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Merge pull request #700 from chrisallenlane/4.3.3

Browse Source 
4.3.3
This commit is contained in:
Chris Allen Lane
2022-08-27 22:07:19 -04:00
committed by GitHub
parent db3d7e53a4 bb85e611f4
commit bd9fa1ba70
596 changed files with 118071 additions and 110 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
INSTALLING.md
View File

@@ -9,13 +9,13 @@ On Unix-like systems, you may simply paste the following snippet into your termi
```sh
cd /tmp \
&& wget https://github.com/cheat/cheat/releases/download/4.3.2/cheat-linux-amd64.gz \
&& wget https://github.com/cheat/cheat/releases/download/4.3.3/cheat-linux-amd64.gz \
&& gunzip cheat-linux-amd64.gz \
&& chmod +x cheat-linux-amd64 \
&& sudo mv cheat-linux-amd64 /usr/local/bin/cheat
```
You may need to need to change the version number (`4.3.2`) and the archive
You may need to need to change the version number (`4.3.3`) and the archive
(`cheat-linux-amd64.gz`) depending on your platform.
See the [releases page][releases] for a list of supported platforms.

2
cmd/cheat/main.go
View File

@@ -16,7 +16,7 @@ import (
"github.com/cheat/cheat/internal/installer"
)
const version = "4.3.2"
const version = "4.3.3"
func main() {

19
go.mod
View File

@@ -6,6 +6,7 @@ require (
github.com/alecthomas/chroma v0.10.0
github.com/davecgh/go-spew v1.1.1
github.com/docopt/docopt-go v0.0.0-20180111231733-ee0de3bc6815
github.com/go-git/go-git/v5 v5.4.2
github.com/mattn/go-isatty v0.0.16
github.com/mitchellh/go-homedir v1.1.0
gopkg.in/yaml.v1 v1.0.0-20140924161607-9f9df34309c0
@@ -13,9 +14,21 @@ require (
)
require (
github.com/Microsoft/go-winio v0.5.2 // indirect
github.com/ProtonMail/go-crypto v0.0.0-20220824120805-4b6e5c587895 // indirect
github.com/acomagu/bufpipe v1.0.3 // indirect
github.com/cloudflare/circl v1.2.0 // indirect
github.com/dlclark/regexp2 v1.7.0 // indirect
github.com/kr/text v0.2.0 // indirect
github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e // indirect
github.com/emirpasic/gods v1.18.1 // indirect
github.com/go-git/gcfg v1.5.0 // indirect
github.com/go-git/go-billy/v5 v5.3.1 // indirect
github.com/imdario/mergo v0.3.13 // indirect
github.com/jbenet/go-context v0.0.0-20150711004518-d14ea06fba99 // indirect
github.com/kevinburke/ssh_config v1.2.0 // indirect
github.com/sergi/go-diff v1.2.0 // indirect
github.com/xanzy/ssh-agent v0.3.2 // indirect
golang.org/x/crypto v0.0.0-20220826181053-bd7e27e6170d // indirect
golang.org/x/net v0.0.0-20220826154423-83b083e8dc8b // indirect
golang.org/x/sys v0.0.0-20220825204002-c680a09ffe64 // indirect
gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f // indirect
gopkg.in/warnings.v0 v0.1.2 // indirect
)

111
go.sum
View File

@@ -1,5 +1,23 @@
github.com/Microsoft/go-winio v0.4.14/go.mod h1:qXqCSQ3Xa7+6tgxaGTIe4Kpcdsi+P8jBhyzoq1bpyYA=
github.com/Microsoft/go-winio v0.4.16/go.mod h1:XB6nPKklQyQ7GC9LdcBEcBl8PF76WugXOPRXwdLnMv0=
github.com/Microsoft/go-winio v0.5.2 h1:a9IhgEQBCUEk6QCdml9CiJGhAws+YwffDHEMp1VMrpA=
github.com/Microsoft/go-winio v0.5.2/go.mod h1:WpS1mjBmmwHBEWmogvA2mj8546UReBk4v8QkMxJ6pZY=
github.com/ProtonMail/go-crypto v0.0.0-20210428141323-04723f9f07d7/go.mod h1:z4/9nQmJSSwwds7ejkxaJwO37dru3geImFUdJlaLzQo=
github.com/ProtonMail/go-crypto v0.0.0-20220824120805-4b6e5c587895 h1:NsReiLpErIPzRrnogAXYwSoU7txA977LjDGrbkewJbg=
github.com/ProtonMail/go-crypto v0.0.0-20220824120805-4b6e5c587895/go.mod h1:UBYPn8k0D56RtnR8RFQMjmh4KrZzWJ5o7Z9SYjossQ8=
github.com/acomagu/bufpipe v1.0.3 h1:fxAGrHZTgQ9w5QqVItgzwj235/uYZYgbXitB+dLupOk=
github.com/acomagu/bufpipe v1.0.3/go.mod h1:mxdxdup/WdsKVreO5GpW4+M/1CE2sMG4jeGJ2sYmHc4=
github.com/alecthomas/chroma v0.10.0 h1:7XDcGkCQopCNKjZHfYrNLraA+M7e0fMiJ/Mfikbfjek=
github.com/alecthomas/chroma v0.10.0/go.mod h1:jtJATyUxlIORhUOFNA9NZDWGAQ8wpxQQqNSB4rjA/1s=
github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239 h1:kFOfPq6dUM1hTo4JG6LR5AXSUEsOjtdm0kw0FtQtMJA=
github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239/go.mod h1:2FmKhYUyUczH0OGQWaF5ceTx0UBShxjsH6f8oGKYe2c=
github.com/armon/go-socks5 v0.0.0-20160902184237-e75332964ef5 h1:0CwZNZbxp69SHPdPJAN/hZIm0C4OItdklCFmMRWYpio=
github.com/armon/go-socks5 v0.0.0-20160902184237-e75332964ef5/go.mod h1:wHh0iHkYZB8zMSxRWpUBQtwG5a7fFgvEO+odwuTv2gs=
github.com/bwesterb/go-ristretto v1.2.0/go.mod h1:fUIoIZaG73pV5biE2Blr2xEzDoMj7NFEuV9ekS419A0=
github.com/bwesterb/go-ristretto v1.2.1/go.mod h1:fUIoIZaG73pV5biE2Blr2xEzDoMj7NFEuV9ekS419A0=
github.com/cloudflare/circl v1.1.0/go.mod h1:prBCrKB9DV4poKZY1l9zBXg2QJY7mvgRvtMxxK7fi4I=
github.com/cloudflare/circl v1.2.0 h1:NheeISPSUcYftKlfrLuOo4T62FkmD4t4jviLfFFYaec=
github.com/cloudflare/circl v1.2.0/go.mod h1:Ch2UgYr6ti2KTtlejELlROl0YIYj7SLjAC8M+INXlMk=
github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
@@ -9,30 +27,117 @@ github.com/dlclark/regexp2 v1.7.0 h1:7lJfhqlPssTb1WQx4yvTHN0uElPEv52sbaECrAQxjAo
github.com/dlclark/regexp2 v1.7.0/go.mod h1:DHkYz0B9wPfa6wondMfaivmHpzrQ3v9q8cnmRbL6yW8=
github.com/docopt/docopt-go v0.0.0-20180111231733-ee0de3bc6815 h1:bWDMxwH3px2JBh6AyO7hdCn/PkvCZXii8TGj7sbtEbQ=
github.com/docopt/docopt-go v0.0.0-20180111231733-ee0de3bc6815/go.mod h1:WwZ+bS3ebgob9U8Nd0kOddGdZWjyMGR8Wziv+TBNwSE=
github.com/emirpasic/gods v1.12.0/go.mod h1:YfzfFFoVP/catgzJb4IKIqXjX78Ha8FMSDh3ymbK86o=
github.com/emirpasic/gods v1.18.1 h1:FXtiHYKDGKCW2KzwZKx0iC0PQmdlorYgdFG9jPXJ1Bc=
github.com/emirpasic/gods v1.18.1/go.mod h1:8tpGGwCnJ5H4r6BWwaV6OrWmMoPhUl5jm/FMNAnJvWQ=
github.com/flynn/go-shlex v0.0.0-20150515145356-3f9db97f8568/go.mod h1:xEzjJPgXI435gkrCt3MPfRiAkVrwSbHsst4LCFVfpJc=
github.com/gliderlabs/ssh v0.2.2 h1:6zsha5zo/TWhRhwqCD3+EarCAgZ2yN28ipRnGPnwkI0=
github.com/gliderlabs/ssh v0.2.2/go.mod h1:U7qILu1NlMHj9FlMhZLlkCdDnU1DBEAqr0aevW3Awn0=
github.com/go-git/gcfg v1.5.0 h1:Q5ViNfGF8zFgyJWPqYwA7qGFoMTEiBmdlkcfRmpIMa4=
github.com/go-git/gcfg v1.5.0/go.mod h1:5m20vg6GwYabIxaOonVkTdrILxQMpEShl1xiMF4ua+E=
github.com/go-git/go-billy/v5 v5.2.0/go.mod h1:pmpqyWchKfYfrkb/UVH4otLvyi/5gJlGI4Hb3ZqZ3W0=
github.com/go-git/go-billy/v5 v5.3.1 h1:CPiOUAzKtMRvolEKw+bG1PLRpT7D3LIs3/3ey4Aiu34=
github.com/go-git/go-billy/v5 v5.3.1/go.mod h1:pmpqyWchKfYfrkb/UVH4otLvyi/5gJlGI4Hb3ZqZ3W0=
github.com/go-git/go-git-fixtures/v4 v4.2.1 h1:n9gGL1Ct/yIw+nfsfr8s4+sbhT+Ncu2SubfXjIWgci8=
github.com/go-git/go-git-fixtures/v4 v4.2.1/go.mod h1:K8zd3kDUAykwTdDCr+I0per6Y6vMiRR/nnVTBtavnB0=
github.com/go-git/go-git/v5 v5.4.2 h1:BXyZu9t0VkbiHtqrsvdq39UDhGJTl1h55VW6CSC4aY4=
github.com/go-git/go-git/v5 v5.4.2/go.mod h1:gQ1kArt6d+n+BGd+/B/I74HwRTLhth2+zti4ihgckDc=
github.com/google/go-cmp v0.3.0 h1:crn/baboCvb5fXaQ0IJ1SGTsTVrWpDsCWC8EGETZijY=
github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
github.com/imdario/mergo v0.3.12/go.mod h1:jmQim1M+e3UYxmgPu/WyfjB3N3VflVyUjjjwH0dnCYA=
github.com/imdario/mergo v0.3.13 h1:lFzP57bqS/wsqKssCGmtLAb8A0wKjLGrve2q3PPVcBk=
github.com/imdario/mergo v0.3.13/go.mod h1:4lJ1jqUDcsbIECGy0RUJAXNIhg+6ocWgb1ALK2O4oXg=
github.com/jbenet/go-context v0.0.0-20150711004518-d14ea06fba99 h1:BQSFePA1RWJOlocH6Fxy8MmwDt+yVQYULKfN0RoTN8A=
github.com/jbenet/go-context v0.0.0-20150711004518-d14ea06fba99/go.mod h1:1lJo3i6rXxKeerYnT8Nvf0QmHCRC1n8sfWVwXF2Frvo=
github.com/jessevdk/go-flags v1.5.0/go.mod h1:Fw0T6WPc1dYxT4mKEZRfG5kJhaTDP9pj1c2EWnYs/m4=
github.com/kevinburke/ssh_config v0.0.0-20201106050909-4977a11b4351/go.mod h1:CT57kijsi8u/K/BOFA39wgDQJ9CxiF4nAY/ojJ6r6mM=
github.com/kevinburke/ssh_config v1.2.0 h1:x584FjTGwHzMwvHx18PXxbBVzfnxogHaAReU4gf13a4=
github.com/kevinburke/ssh_config v1.2.0/go.mod h1:CT57kijsi8u/K/BOFA39wgDQJ9CxiF4nAY/ojJ6r6mM=
github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
github.com/kr/pretty v0.2.1 h1:Fmg33tUaq4/8ym9TJN1x7sLJnHVwhP33CNkpYV/7rwI=
github.com/kr/pretty v0.2.1/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfnI=
github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
github.com/kr/text v0.2.0 h1:5Nx0Ya0ZqY2ygV366QzturHI13Jq95ApcVaJBhpS+AY=
github.com/kr/text v0.2.0/go.mod h1:eLer722TekiGuMkidMxC/pM04lWEeraHUUmBw8l2grE=
github.com/matryer/is v1.2.0 h1:92UTHpy8CDwaJ08GqLDzhhuixiBUUD1p3AU6PHddz4A=
github.com/matryer/is v1.2.0/go.mod h1:2fLPjFQM9rhQ15aVEtbuwhJinnOqrmgXPNdZsdwlWXA=
github.com/mattn/go-isatty v0.0.16 h1:bq3VjFmv/sOjHtdEhmkEV4x1AJtvUvOJ2PFAZ5+peKQ=
github.com/mattn/go-isatty v0.0.16/go.mod h1:kYGgaQfpe5nmfYZH+SKPsOc2e4SrIfOl2e/yFXSvRLM=
github.com/mitchellh/go-homedir v1.1.0 h1:lukF9ziXFxDFPkA1vsr5zpc1XuPDn/wFntq5mG+4E0Y=
github.com/mitchellh/go-homedir v1.1.0/go.mod h1:SfyaCUpYCn1Vlf4IUYiD9fPX4A5wJrkLzIz1N1q0pr0=
github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e h1:fD57ERR4JtEqsWbfPhv4DMiApHyliiK5xCTNVSPiaAs=
github.com/niemeyer/pretty v0.0.0-20200227124842-a10e7caefd8e/go.mod h1:zD1mROLANZcx1PVRCS0qkT7pwLkGfwJo4zjcN/Tysno=
github.com/pkg/errors v0.8.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
github.com/pkg/errors v0.9.1 h1:FEBLx1zS214owpjy7qsBeixbURkuhQAwrK5UwLGTwt4=
github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
github.com/sergi/go-diff v1.1.0/go.mod h1:STckp+ISIX8hZLjrqAeVduY0gWCT9IjLuqbuNXdaHfM=
github.com/sergi/go-diff v1.2.0 h1:XU+rvMAioB0UC3q1MFrIQy4Vo5/4VsRDQQXHsEya6xQ=
github.com/sergi/go-diff v1.2.0/go.mod h1:STckp+ISIX8hZLjrqAeVduY0gWCT9IjLuqbuNXdaHfM=
github.com/sirupsen/logrus v1.4.1/go.mod h1:ni0Sbl8bgC9z8RoU9G6nDWqqs/fq4eDPysMBDgk/93Q=
github.com/sirupsen/logrus v1.7.0/go.mod h1:yWOB1SBYBC5VeMP7gHvWumXLIWorT60ONWic61uBYv0=
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/objx v0.1.1/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
github.com/stretchr/testify v1.4.0/go.mod h1:j7eGeouHqKxXV5pUuKE4zz7dFj8WfuZ+81PSLYec5m4=
github.com/stretchr/testify v1.7.0 h1:nwc3DEeHmmLAfoZucVR881uASk0Mfjw8xYJ99tb5CcY=
github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
github.com/xanzy/ssh-agent v0.3.0/go.mod h1:3s9xbODqPuuhK9JV1R321M/FlMZSBvE5aY6eAcqrDh0=
github.com/xanzy/ssh-agent v0.3.2 h1:eKj4SX2Fe7mui28ZgnFW5fmTz1EIr7ugo5s6wDxdHBM=
github.com/xanzy/ssh-agent v0.3.2/go.mod h1:6dzNDKs0J9rVPHPhaGCukekBHKqfl+L3KghI1Bc68Uw=
golang.org/x/crypto v0.0.0-20190219172222-a4c6cb3142f2/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
golang.org/x/crypto v0.0.0-20210322153248-0c34fe9e7dc2/go.mod h1:T9bdIzuCu7OtxOm1hfPfRQxPLYneinmdGuTeoZ9dtd4=
golang.org/x/crypto v0.0.0-20210421170649-83a5a9bb288b/go.mod h1:T9bdIzuCu7OtxOm1hfPfRQxPLYneinmdGuTeoZ9dtd4=
golang.org/x/crypto v0.0.0-20210921155107-089bfa567519/go.mod h1:GvvjBRRGRdwPK5ydBHafDWAxML/pGHZbMvKqRZ5+Abc=
golang.org/x/crypto v0.0.0-20220315160706-3147a52a75dd/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
golang.org/x/crypto v0.0.0-20220622213112-05595931fe9d/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
golang.org/x/crypto v0.0.0-20220826181053-bd7e27e6170d h1:3qF+Z8Hkrw9sOhrFHti9TlB1Hkac1x+DNRkv0XQiFjo=
golang.org/x/crypto v0.0.0-20220826181053-bd7e27e6170d/go.mod h1:IxCIyHEi3zRg3s0A5j5BB6A9Jmi73HwBIUl50j+osU4=
golang.org/x/net v0.0.0-20210226172049-e18ecbb05110/go.mod h1:m0MpNAwzfU5UDzcl9v0D8zg8gWTRqZa9RBIspLL5mdg=
golang.org/x/net v0.0.0-20210326060303-6b1517762897/go.mod h1:uSPa2vr4CLtc/ILN5odXGNXS6mhrKVzTaCXzk9m6W3k=
golang.org/x/net v0.0.0-20211112202133-69e39bad7dc2/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
golang.org/x/net v0.0.0-20220826154423-83b083e8dc8b h1:ZmngSVLe/wycRns9MKikG9OWIEjGcGAkacif7oYQaUY=
golang.org/x/net v0.0.0-20220826154423-83b083e8dc8b/go.mod h1:YDH+HFinaLZZlnHAfSS6ZXJJ9M9t4Dl22yv3iI2vPwk=
golang.org/x/sys v0.0.0-20180905080454-ebe1bf3edb33/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
golang.org/x/sys v0.0.0-20190507160741-ecd444e8653b/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20190916202348-b4ddaad3f8a3/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20191026070338-33540a1f6037/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20200302150141-5c8b2ff67527/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210124154548-22da62e12c0c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210320140829-1e4c9ba3b0c4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210324051608-47abb6519492/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210502180810-71e4cd670f79/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
golang.org/x/sys v0.0.0-20210615035016-665e8c7367d1/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20211007075335-d3039528d8ac/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20220315194320-039c03cc5b86/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/sys v0.0.0-20220825204002-c680a09ffe64 h1:UiNENfZ8gDvpiWw7IpOMQ27spWmThO1RwwdQVbJahJM=
golang.org/x/sys v0.0.0-20220825204002-c680a09ffe64/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
golang.org/x/term v0.0.0-20210927222741-03fcf44c2211 h1:JGgROgKl9N8DuW20oFS5gxc+lE67/N3FcwmBPMe7ArY=
golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/text v0.3.6/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
golang.org/x/text v0.3.7 h1:olpwvP2KacW1ZWvsR7uQhoyTYvKAupfQrRGBFM352Gk=
golang.org/x/tools v0.0.0-20180917221912-90fa682c2a6e/go.mod h1:n7NCudcB/nEzxVGmLbDWY5pfWTLqBcC2KZ6jyYvM4mQ=
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f h1:BLraFXnmrev5lT+xlilqcH8XK9/i0At2xKjWk4p6zsU=
gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c h1:Hei/4ADfdWqJk1ZMxUNpqntNwaWcugrBjAiHlqqRiVk=
gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
gopkg.in/warnings.v0 v0.1.2 h1:wFXVbFY8DY5/xOe1ECiWdKCzZlxgshcYVNkBHstARME=
gopkg.in/warnings.v0 v0.1.2/go.mod h1:jksf8JmL6Qr/oQM2OXTHunEvvTAsrWBLb6OOjuVWRNI=
gopkg.in/yaml.v1 v1.0.0-20140924161607-9f9df34309c0 h1:POO/ycCATvegFmVuPpQzZFJ+pGZeX22Ufu6fibxDVjU=
gopkg.in/yaml.v1 v1.0.0-20140924161607-9f9df34309c0/go.mod h1:WDnlLJ4WF5VGsH/HVa3CI79GS0ol3YnhVnKP89i0kNg=
gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.2.4/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
gopkg.in/yaml.v3 v3.0.0 h1:hjy8E9ON/egN1tAYqKb61G10WtihqetD4sz2H+8nIeA=
gopkg.in/yaml.v3 v3.0.0/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

24
internal/installer/clone.go
View File

@@ -1,24 +0,0 @@
package installer
import (
"fmt"
"os"
"os/exec"
)
const cloneURL = "https://github.com/cheat/cheatsheets.git"
// clone clones the community cheatsheets
func clone(path string) error {
// perform the clone in a shell
cmd := exec.Command("git", "clone", cloneURL, path)
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
err := cmd.Run()
if err != nil {
return fmt.Errorf("failed to clone cheatsheets: %v", err)
}
return nil
}

3
internal/installer/run.go
View File

@@ -7,6 +7,7 @@ import (
"strings"
"github.com/cheat/cheat/internal/config"
"github.com/cheat/cheat/internal/repo"
)
// Run runs the installer
@@ -45,7 +46,7 @@ func Run(configs string, confpath string) error {
if yes {
// clone the community cheatsheets
fmt.Printf("Cloning community cheatsheets to %s.\n", community)
if err := clone(community); err != nil {
if err := repo.Clone(community); err != nil {
return fmt.Errorf("failed to clone cheatsheets: %v", err)
}

25
internal/repo/clone.go Normal file
View File

@@ -0,0 +1,25 @@
package repo
import (
"fmt"
"os"
"github.com/go-git/go-git/v5"
)
// Clone clones the repo available at `url`
func Clone(url string) error {
// clone the community cheatsheets
_, err := git.PlainClone(url, false, &git.CloneOptions{
URL: "https://github.com/cheat/cheatsheets.git",
Depth: 1,
Progress: os.Stdout,
})
if err != nil {
return fmt.Errorf("failed to clone cheatsheets: %v", err)
}
return nil
}

109
internal/repo/gitdir.go Normal file
View File

@@ -0,0 +1,109 @@
package repo
import (
"fmt"
"os"
"strings"
)
// GitDir returns `true` if we are iterating over a directory contained within
// a repositories `.git` directory.
func GitDir(path string) (bool, error) {
/*
A bit of context is called for here, because this functionality has
previously caused a number of tricky, subtle bugs.
Fundamentally, here we are simply trying to avoid walking over the
contents of the `.git` directory. Doing so potentially makes
hundreds/thousands of needless syscalls, and can noticeably harm
performance on machines with slow disks.
The earliest effort to solve this problem involved simply returning
`fs.SkipDir` when the cheatsheet file path began with `.`, signifying a
hidden directory. This, however, caused two problems:
1. The `.cheat` directory was ignored
2. Cheatsheets installed by `brew` (which were by default installed to
`~/.config/cheat`) were ignored
See: https://github.com/cheat/cheat/issues/690
To remedy this, the exclusion criteria were narrowed, and the search
for a literal `.` was replaced with a search for a literal `.git`.
This, however, broke user installations that stored cheatsheets in
`git` submodules, because such an installation would contain a `.git`
file that pointed to the upstream repository.
See: https://github.com/cheat/cheat/issues/694
The next attempt at solving this was to search for a `.git` literal
string in the cheatsheet file path. If a match was not found, we would
continue to walk the directory, as before.
If a match *was* found, we determined whether `.git` referred to a file
or directory, and would only stop walking the path in the latter case.
This, however, caused crashes if a cheatpath contained a `.gitignore`
file. (Presumably, a crash would likewise occur on the presence of
`.gitattributes`, `.gitmodules`, etc.)
See: https://github.com/cheat/cheat/issues/699
Accounting for all of the above (hopefully?), the current solution is
not to search for `.git`, but `.git/` (including the directory
separator), and then only ceasing to walk the directory on a match.
To summarize, this code must account for the following possibilities:
1. A cheatpath is not a repository
2. A cheatpath is a repository
3. A cheatpath is a repository, and contains a `.git*` file
4. A cheatpath is a submodule
Care must be taken to support the above on both Unix and Windows
systems, which have different directory separators and line-endings.
There is a lot of nuance to all of this, and it would be worthwhile to
do two things to stop writing bugs here:
1. Build integration tests around all of this
2. Discard string-matching solutions entirely, and use `go-git` instead
NB: A reasonable smoke-test for ensuring that skipping is being applied
correctly is to run the following command:
make && strace ./dist/cheat -l | wc -l
That check should be run twice: once normally, and once after
commenting out the "skip" check in `sheets.Load`.
The specific line counts don't matter; what matters is that the number
of syscalls should be significantly lower with the skip check enabled.
*/
// determine if the literal string `.git` appears within `path`
pos := strings.Index(path, fmt.Sprintf(".git%s", string(os.PathSeparator)))
// if it does not, we know for certain that we are not within a `.git`
// directory.
if pos == -1 {
return false, nil
}
// If `path` does contain the string `.git`, we need to determine if we're
// inside of a `.git` directory, or if `path` points to a cheatsheet that's
// stored within a `git` submodule.
//
// See: https://github.com/cheat/cheat/issues/694
// truncate `path` to the occurrence of `.git`
f, err := os.Stat(path[:pos+5])
if err != nil {
return false, fmt.Errorf("failed to stat path %s: %v", path, err)
}
// return true or false depending on whether the truncated path is a
// directory
return f.Mode().IsDir(), nil
}

1
internal/repo/update.go Normal file
View File

@@ -0,0 +1 @@
package repo

72
internal/sheets/gitdir.go
View File

@@ -1,72 +0,0 @@
package sheets
import (
"fmt"
"os"
"strings"
)
// isGitDir returns `true` if `path` is within a `.git` directory, or `false`
// otherwise
func isGitDir(path string) (bool, error) {
/*
A bit of context is called for here, because this functionality has
previously caused a number of tricky, subtle bugs.
Fundamentally, here we are simply trying to avoid walking over the
contents of the `.git` directory. Doing so potentially makes
hundreds/thousands of needless syscalls, and can noticeably harm
performance on machines with slow disks.
The earliest effort to solve this problem involved simply returning
`fs.SkipDir` when the cheatsheet file path began with `.`, signifying a
hidden directory. This, however, caused two problems:
1. The `.cheat` directory was ignored
2. Cheatsheets installed by `brew` (which were by default installed to
`~/.config/cheat`) were ignored
See: https://github.com/cheat/cheat/issues/690
To remedy this, the exclusion criteria were narrowed, and the search
for a literal `.` was replaced with a search for a literal `.git`.
This, however, broke user installations that stored cheatsheets in
`git` submodules, because such an installation would contain a `.git`
file that pointed to the upstream repository.
See: https://github.com/cheat/cheat/issues/694
Accounting for all of the above, we are now searching for the presence
of a `.git` literal string in the cheatsheet file path. If it is not
found, we continue to walk the directory, as before.
If it *is* found, we determine if `.git` refers to a file or directory,
and only stop walking the path in the latter case.
*/
// determine if the literal string `.git` appears within `path`
pos := strings.Index(path, ".git")
// if it does not, we know for certain that we are not within a `.git`
// directory.
if pos == -1 {
return false, nil
}
// If `path` does contain the string `.git`, we need to determine if we're
// inside of a `.git` directory, or if `path` points to a cheatsheet that's
// stored within a `git` submodule.
//
// See: https://github.com/cheat/cheat/issues/694
// truncate `path` to the occurrence of `.git`
f, err := os.Stat(path[:pos+4])
if err != nil {
return false, fmt.Errorf("failed to stat path %s: %v", path, err)
}
// return true or false depending on whether the truncated path is a
// directory
return f.Mode().IsDir(), nil
}

3
internal/sheets/load.go
View File

@@ -8,6 +8,7 @@ import (
"strings"
cp "github.com/cheat/cheat/internal/cheatpath"
"github.com/cheat/cheat/internal/repo"
"github.com/cheat/cheat/internal/sheet"
)
@@ -52,7 +53,7 @@ func Load(cheatpaths []cp.Cheatpath) ([]map[string]sheet.Sheet, error) {
// Don't walk the `.git` directory. Doing so creates
// hundreds/thousands of needless syscalls and could
// potentially harm performance on machines with slow disks.
skip, err := isGitDir(path)
skip, err := repo.GitDir(path)
if err != nil {
return fmt.Errorf("failed to identify .git directory: %v", err)
}

1
vendor/github.com/Microsoft/go-winio/.gitignore generated vendored Normal file
View File

@@ -0,0 +1 @@
*.exe

1
vendor/github.com/Microsoft/go-winio/CODEOWNERS generated vendored Normal file
View File

@@ -0,0 +1 @@
* @microsoft/containerplat

22
vendor/github.com/Microsoft/go-winio/LICENSE generated vendored Normal file
View File

@@ -0,0 +1,22 @@
The MIT License (MIT)
Copyright (c) 2015 Microsoft
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

37
vendor/github.com/Microsoft/go-winio/README.md generated vendored Normal file
View File

@@ -0,0 +1,37 @@
# go-winio [![Build Status](https://github.com/microsoft/go-winio/actions/workflows/ci.yml/badge.svg)](https://github.com/microsoft/go-winio/actions/workflows/ci.yml)
This repository contains utilities for efficiently performing Win32 IO operations in
Go. Currently, this is focused on accessing named pipes and other file handles, and
for using named pipes as a net transport.
This code relies on IO completion ports to avoid blocking IO on system threads, allowing Go
to reuse the thread to schedule another goroutine. This limits support to Windows Vista and
newer operating systems. This is similar to the implementation of network sockets in Go's net
package.
Please see the LICENSE file for licensing information.
## Contributing
This project welcomes contributions and suggestions. Most contributions require you to agree to a Contributor License Agreement (CLA)
declaring that you have the right to, and actually do, grant us the rights to use your contribution. For details, visit https://cla.microsoft.com.
When you submit a pull request, a CLA-bot will automatically determine whether you need to provide a CLA and decorate the PR
appropriately (e.g., label, comment). Simply follow the instructions provided by the bot. You will only need to do this once across all repos using our CLA.
We also require that contributors sign their commits using git commit -s or git commit --signoff to certify they either authored the work themselves
or otherwise have permission to use it in this project. Please see https://developercertificate.org/ for more info, as well as to make sure that you can
attest to the rules listed. Our CI uses the DCO Github app to ensure that all commits in a given PR are signed-off.
## Code of Conduct
This project has adopted the [Microsoft Open Source Code of Conduct](https://opensource.microsoft.com/codeofconduct/).
For more information see the [Code of Conduct FAQ](https://opensource.microsoft.com/codeofconduct/faq/) or
contact [opencode@microsoft.com](mailto:opencode@microsoft.com) with any additional questions or comments.
## Special Thanks
Thanks to natefinch for the inspiration for this library. See https://github.com/natefinch/npipe
for another named pipe implementation.

280
vendor/github.com/Microsoft/go-winio/backup.go generated vendored Normal file
View File

@@ -0,0 +1,280 @@
// +build windows
package winio
import (
"encoding/binary"
"errors"
"fmt"
"io"
"io/ioutil"
"os"
"runtime"
"syscall"
"unicode/utf16"
)
//sys backupRead(h syscall.Handle, b []byte, bytesRead *uint32, abort bool, processSecurity bool, context *uintptr) (err error) = BackupRead
//sys backupWrite(h syscall.Handle, b []byte, bytesWritten *uint32, abort bool, processSecurity bool, context *uintptr) (err error) = BackupWrite
const (
BackupData = uint32(iota + 1)
BackupEaData
BackupSecurity
BackupAlternateData
BackupLink
BackupPropertyData
BackupObjectId
BackupReparseData
BackupSparseBlock
BackupTxfsData
)
const (
StreamSparseAttributes = uint32(8)
)
const (
WRITE_DAC = 0x40000
WRITE_OWNER = 0x80000
ACCESS_SYSTEM_SECURITY = 0x1000000
)
// BackupHeader represents a backup stream of a file.
type BackupHeader struct {
Id uint32 // The backup stream ID
Attributes uint32 // Stream attributes
Size int64 // The size of the stream in bytes
Name string // The name of the stream (for BackupAlternateData only).
Offset int64 // The offset of the stream in the file (for BackupSparseBlock only).
}
type win32StreamId struct {
StreamId uint32
Attributes uint32
Size uint64
NameSize uint32
}
// BackupStreamReader reads from a stream produced by the BackupRead Win32 API and produces a series
// of BackupHeader values.
type BackupStreamReader struct {
r io.Reader
bytesLeft int64
}
// NewBackupStreamReader produces a BackupStreamReader from any io.Reader.
func NewBackupStreamReader(r io.Reader) *BackupStreamReader {
return &BackupStreamReader{r, 0}
}
// Next returns the next backup stream and prepares for calls to Read(). It skips the remainder of the current stream if
// it was not completely read.
func (r *BackupStreamReader) Next() (*BackupHeader, error) {
if r.bytesLeft > 0 {
if s, ok := r.r.(io.Seeker); ok {
// Make sure Seek on io.SeekCurrent sometimes succeeds
// before trying the actual seek.
if _, err := s.Seek(0, io.SeekCurrent); err == nil {
if _, err = s.Seek(r.bytesLeft, io.SeekCurrent); err != nil {
return nil, err
}
r.bytesLeft = 0
}
}
if _, err := io.Copy(ioutil.Discard, r); err != nil {
return nil, err
}
}
var wsi win32StreamId
if err := binary.Read(r.r, binary.LittleEndian, &wsi); err != nil {
return nil, err
}
hdr := &BackupHeader{
Id: wsi.StreamId,
Attributes: wsi.Attributes,
Size: int64(wsi.Size),
}
if wsi.NameSize != 0 {
name := make([]uint16, int(wsi.NameSize/2))
if err := binary.Read(r.r, binary.LittleEndian, name); err != nil {
return nil, err
}
hdr.Name = syscall.UTF16ToString(name)
}
if wsi.StreamId == BackupSparseBlock {
if err := binary.Read(r.r, binary.LittleEndian, &hdr.Offset); err != nil {
return nil, err
}
hdr.Size -= 8
}
r.bytesLeft = hdr.Size
return hdr, nil
}
// Read reads from the current backup stream.
func (r *BackupStreamReader) Read(b []byte) (int, error) {
if r.bytesLeft == 0 {
return 0, io.EOF
}
if int64(len(b)) > r.bytesLeft {
b = b[:r.bytesLeft]
}
n, err := r.r.Read(b)
r.bytesLeft -= int64(n)
if err == io.EOF {
err = io.ErrUnexpectedEOF
} else if r.bytesLeft == 0 && err == nil {
err = io.EOF
}
return n, err
}
// BackupStreamWriter writes a stream compatible with the BackupWrite Win32 API.
type BackupStreamWriter struct {
w io.Writer
bytesLeft int64
}
// NewBackupStreamWriter produces a BackupStreamWriter on top of an io.Writer.
func NewBackupStreamWriter(w io.Writer) *BackupStreamWriter {
return &BackupStreamWriter{w, 0}
}
// WriteHeader writes the next backup stream header and prepares for calls to Write().
func (w *BackupStreamWriter) WriteHeader(hdr *BackupHeader) error {
if w.bytesLeft != 0 {
return fmt.Errorf("missing %d bytes", w.bytesLeft)
}
name := utf16.Encode([]rune(hdr.Name))
wsi := win32StreamId{
StreamId: hdr.Id,
Attributes: hdr.Attributes,
Size: uint64(hdr.Size),
NameSize: uint32(len(name) * 2),
}
if hdr.Id == BackupSparseBlock {
// Include space for the int64 block offset
wsi.Size += 8
}
if err := binary.Write(w.w, binary.LittleEndian, &wsi); err != nil {
return err
}
if len(name) != 0 {
if err := binary.Write(w.w, binary.LittleEndian, name); err != nil {
return err
}
}
if hdr.Id == BackupSparseBlock {
if err := binary.Write(w.w, binary.LittleEndian, hdr.Offset); err != nil {
return err
}
}
w.bytesLeft = hdr.Size
return nil
}
// Write writes to the current backup stream.
func (w *BackupStreamWriter) Write(b []byte) (int, error) {
if w.bytesLeft < int64(len(b)) {
return 0, fmt.Errorf("too many bytes by %d", int64(len(b))-w.bytesLeft)
}
n, err := w.w.Write(b)
w.bytesLeft -= int64(n)
return n, err
}
// BackupFileReader provides an io.ReadCloser interface on top of the BackupRead Win32 API.
type BackupFileReader struct {
f *os.File
includeSecurity bool
ctx uintptr
}
// NewBackupFileReader returns a new BackupFileReader from a file handle. If includeSecurity is true,
// Read will attempt to read the security descriptor of the file.
func NewBackupFileReader(f *os.File, includeSecurity bool) *BackupFileReader {
r := &BackupFileReader{f, includeSecurity, 0}
return r
}
// Read reads a backup stream from the file by calling the Win32 API BackupRead().
func (r *BackupFileReader) Read(b []byte) (int, error) {
var bytesRead uint32
err := backupRead(syscall.Handle(r.f.Fd()), b, &bytesRead, false, r.includeSecurity, &r.ctx)
if err != nil {
return 0, &os.PathError{"BackupRead", r.f.Name(), err}
}
runtime.KeepAlive(r.f)
if bytesRead == 0 {
return 0, io.EOF
}
return int(bytesRead), nil
}
// Close frees Win32 resources associated with the BackupFileReader. It does not close
// the underlying file.
func (r *BackupFileReader) Close() error {
if r.ctx != 0 {
backupRead(syscall.Handle(r.f.Fd()), nil, nil, true, false, &r.ctx)
runtime.KeepAlive(r.f)
r.ctx = 0
}
return nil
}
// BackupFileWriter provides an io.WriteCloser interface on top of the BackupWrite Win32 API.
type BackupFileWriter struct {
f *os.File
includeSecurity bool
ctx uintptr
}
// NewBackupFileWriter returns a new BackupFileWriter from a file handle. If includeSecurity is true,
// Write() will attempt to restore the security descriptor from the stream.
func NewBackupFileWriter(f *os.File, includeSecurity bool) *BackupFileWriter {
w := &BackupFileWriter{f, includeSecurity, 0}
return w
}
// Write restores a portion of the file using the provided backup stream.
func (w *BackupFileWriter) Write(b []byte) (int, error) {
var bytesWritten uint32
err := backupWrite(syscall.Handle(w.f.Fd()), b, &bytesWritten, false, w.includeSecurity, &w.ctx)
if err != nil {
return 0, &os.PathError{"BackupWrite", w.f.Name(), err}
}
runtime.KeepAlive(w.f)
if int(bytesWritten) != len(b) {
return int(bytesWritten), errors.New("not all bytes could be written")
}
return len(b), nil
}
// Close frees Win32 resources associated with the BackupFileWriter. It does not
// close the underlying file.
func (w *BackupFileWriter) Close() error {
if w.ctx != 0 {
backupWrite(syscall.Handle(w.f.Fd()), nil, nil, true, false, &w.ctx)
runtime.KeepAlive(w.f)
w.ctx = 0
}
return nil
}
// OpenForBackup opens a file or directory, potentially skipping access checks if the backup
// or restore privileges have been acquired.
//
// If the file opened was a directory, it cannot be used with Readdir().
func OpenForBackup(path string, access uint32, share uint32, createmode uint32) (*os.File, error) {
winPath, err := syscall.UTF16FromString(path)
if err != nil {
return nil, err
}
h, err := syscall.CreateFile(&winPath[0], access, share, nil, createmode, syscall.FILE_FLAG_BACKUP_SEMANTICS|syscall.FILE_FLAG_OPEN_REPARSE_POINT, 0)
if err != nil {
err = &os.PathError{Op: "open", Path: path, Err: err}
return nil, err
}
return os.NewFile(uintptr(h), path), nil
}

137
vendor/github.com/Microsoft/go-winio/ea.go generated vendored Normal file
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package winio
import (
"bytes"
"encoding/binary"
"errors"
)
type fileFullEaInformation struct {
NextEntryOffset uint32
Flags uint8
NameLength uint8
ValueLength uint16
}
var (
fileFullEaInformationSize = binary.Size(&fileFullEaInformation{})
errInvalidEaBuffer = errors.New("invalid extended attribute buffer")
errEaNameTooLarge = errors.New("extended attribute name too large")
errEaValueTooLarge = errors.New("extended attribute value too large")
)
// ExtendedAttribute represents a single Windows EA.
type ExtendedAttribute struct {
Name string
Value []byte
Flags uint8
}
func parseEa(b []byte) (ea ExtendedAttribute, nb []byte, err error) {
var info fileFullEaInformation
err = binary.Read(bytes.NewReader(b), binary.LittleEndian, &info)
if err != nil {
err = errInvalidEaBuffer
return
}
nameOffset := fileFullEaInformationSize
nameLen := int(info.NameLength)
valueOffset := nameOffset + int(info.NameLength) + 1
valueLen := int(info.ValueLength)
nextOffset := int(info.NextEntryOffset)
if valueLen+valueOffset > len(b) || nextOffset < 0 || nextOffset > len(b) {
err = errInvalidEaBuffer
return
}
ea.Name = string(b[nameOffset : nameOffset+nameLen])
ea.Value = b[valueOffset : valueOffset+valueLen]
ea.Flags = info.Flags
if info.NextEntryOffset != 0 {
nb = b[info.NextEntryOffset:]
}
return
}
// DecodeExtendedAttributes decodes a list of EAs from a FILE_FULL_EA_INFORMATION
// buffer retrieved from BackupRead, ZwQueryEaFile, etc.
func DecodeExtendedAttributes(b []byte) (eas []ExtendedAttribute, err error) {
for len(b) != 0 {
ea, nb, err := parseEa(b)
if err != nil {
return nil, err
}
eas = append(eas, ea)
b = nb
}
return
}
func writeEa(buf *bytes.Buffer, ea *ExtendedAttribute, last bool) error {
if int(uint8(len(ea.Name))) != len(ea.Name) {
return errEaNameTooLarge
}
if int(uint16(len(ea.Value))) != len(ea.Value) {
return errEaValueTooLarge
}
entrySize := uint32(fileFullEaInformationSize + len(ea.Name) + 1 + len(ea.Value))
withPadding := (entrySize + 3) &^ 3
nextOffset := uint32(0)
if !last {
nextOffset = withPadding
}
info := fileFullEaInformation{
NextEntryOffset: nextOffset,
Flags: ea.Flags,
NameLength: uint8(len(ea.Name)),
ValueLength: uint16(len(ea.Value)),
}
err := binary.Write(buf, binary.LittleEndian, &info)
if err != nil {
return err
}
_, err = buf.Write([]byte(ea.Name))
if err != nil {
return err
}
err = buf.WriteByte(0)
if err != nil {
return err
}
_, err = buf.Write(ea.Value)
if err != nil {
return err
}
_, err = buf.Write([]byte{0, 0, 0}[0 : withPadding-entrySize])
if err != nil {
return err
}
return nil
}
// EncodeExtendedAttributes encodes a list of EAs into a FILE_FULL_EA_INFORMATION
// buffer for use with BackupWrite, ZwSetEaFile, etc.
func EncodeExtendedAttributes(eas []ExtendedAttribute) ([]byte, error) {
var buf bytes.Buffer
for i := range eas {
last := false
if i == len(eas)-1 {
last = true
}
err := writeEa(&buf, &eas[i], last)
if err != nil {
return nil, err
}
}
return buf.Bytes(), nil
}

329
vendor/github.com/Microsoft/go-winio/file.go generated vendored Normal file
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@@ -0,0 +1,329 @@
//go:build windows
// +build windows
package winio
import (
"errors"
"io"
"runtime"
"sync"
"sync/atomic"
"syscall"
"time"
)
//sys cancelIoEx(file syscall.Handle, o *syscall.Overlapped) (err error) = CancelIoEx
//sys createIoCompletionPort(file syscall.Handle, port syscall.Handle, key uintptr, threadCount uint32) (newport syscall.Handle, err error) = CreateIoCompletionPort
//sys getQueuedCompletionStatus(port syscall.Handle, bytes *uint32, key *uintptr, o **ioOperation, timeout uint32) (err error) = GetQueuedCompletionStatus
//sys setFileCompletionNotificationModes(h syscall.Handle, flags uint8) (err error) = SetFileCompletionNotificationModes
//sys wsaGetOverlappedResult(h syscall.Handle, o *syscall.Overlapped, bytes *uint32, wait bool, flags *uint32) (err error) = ws2_32.WSAGetOverlappedResult
type atomicBool int32
func (b *atomicBool) isSet() bool { return atomic.LoadInt32((*int32)(b)) != 0 }
func (b *atomicBool) setFalse() { atomic.StoreInt32((*int32)(b), 0) }
func (b *atomicBool) setTrue() { atomic.StoreInt32((*int32)(b), 1) }
func (b *atomicBool) swap(new bool) bool {
var newInt int32
if new {
newInt = 1
}
return atomic.SwapInt32((*int32)(b), newInt) == 1
}
const (
cFILE_SKIP_COMPLETION_PORT_ON_SUCCESS = 1
cFILE_SKIP_SET_EVENT_ON_HANDLE = 2
)
var (
ErrFileClosed = errors.New("file has already been closed")
ErrTimeout = &timeoutError{}
)
type timeoutError struct{}
func (e *timeoutError) Error() string { return "i/o timeout" }
func (e *timeoutError) Timeout() bool { return true }
func (e *timeoutError) Temporary() bool { return true }
type timeoutChan chan struct{}
var ioInitOnce sync.Once
var ioCompletionPort syscall.Handle
// ioResult contains the result of an asynchronous IO operation
type ioResult struct {
bytes uint32
err error
}
// ioOperation represents an outstanding asynchronous Win32 IO
type ioOperation struct {
o syscall.Overlapped
ch chan ioResult
}
func initIo() {
h, err := createIoCompletionPort(syscall.InvalidHandle, 0, 0, 0xffffffff)
if err != nil {
panic(err)
}
ioCompletionPort = h
go ioCompletionProcessor(h)
}
// win32File implements Reader, Writer, and Closer on a Win32 handle without blocking in a syscall.
// It takes ownership of this handle and will close it if it is garbage collected.
type win32File struct {
handle syscall.Handle
wg sync.WaitGroup
wgLock sync.RWMutex
closing atomicBool
socket bool
readDeadline deadlineHandler
writeDeadline deadlineHandler
}
type deadlineHandler struct {
setLock sync.Mutex
channel timeoutChan
channelLock sync.RWMutex
timer *time.Timer
timedout atomicBool
}
// makeWin32File makes a new win32File from an existing file handle
func makeWin32File(h syscall.Handle) (*win32File, error) {
f := &win32File{handle: h}
ioInitOnce.Do(initIo)
_, err := createIoCompletionPort(h, ioCompletionPort, 0, 0xffffffff)
if err != nil {
return nil, err
}
err = setFileCompletionNotificationModes(h, cFILE_SKIP_COMPLETION_PORT_ON_SUCCESS|cFILE_SKIP_SET_EVENT_ON_HANDLE)
if err != nil {
return nil, err
}
f.readDeadline.channel = make(timeoutChan)
f.writeDeadline.channel = make(timeoutChan)
return f, nil
}
func MakeOpenFile(h syscall.Handle) (io.ReadWriteCloser, error) {
// If we return the result of makeWin32File directly, it can result in an
// interface-wrapped nil, rather than a nil interface value.
f, err := makeWin32File(h)
if err != nil {
return nil, err
}
return f, nil
}
// closeHandle closes the resources associated with a Win32 handle
func (f *win32File) closeHandle() {
f.wgLock.Lock()
// Atomically set that we are closing, releasing the resources only once.
if !f.closing.swap(true) {
f.wgLock.Unlock()
// cancel all IO and wait for it to complete
cancelIoEx(f.handle, nil)
f.wg.Wait()
// at this point, no new IO can start
syscall.Close(f.handle)
f.handle = 0
} else {
f.wgLock.Unlock()
}
}
// Close closes a win32File.
func (f *win32File) Close() error {
f.closeHandle()
return nil
}
// IsClosed checks if the file has been closed
func (f *win32File) IsClosed() bool {
return f.closing.isSet()
}
// prepareIo prepares for a new IO operation.
// The caller must call f.wg.Done() when the IO is finished, prior to Close() returning.
func (f *win32File) prepareIo() (*ioOperation, error) {
f.wgLock.RLock()
if f.closing.isSet() {
f.wgLock.RUnlock()
return nil, ErrFileClosed
}
f.wg.Add(1)
f.wgLock.RUnlock()
c := &ioOperation{}
c.ch = make(chan ioResult)
return c, nil
}
// ioCompletionProcessor processes completed async IOs forever
func ioCompletionProcessor(h syscall.Handle) {
for {
var bytes uint32
var key uintptr
var op *ioOperation
err := getQueuedCompletionStatus(h, &bytes, &key, &op, syscall.INFINITE)
if op == nil {
panic(err)
}
op.ch <- ioResult{bytes, err}
}
}
// asyncIo processes the return value from ReadFile or WriteFile, blocking until
// the operation has actually completed.
func (f *win32File) asyncIo(c *ioOperation, d *deadlineHandler, bytes uint32, err error) (int, error) {
if err != syscall.ERROR_IO_PENDING {
return int(bytes), err
}
if f.closing.isSet() {
cancelIoEx(f.handle, &c.o)
}
var timeout timeoutChan
if d != nil {
d.channelLock.Lock()
timeout = d.channel
d.channelLock.Unlock()
}
var r ioResult
select {
case r = <-c.ch:
err = r.err
if err == syscall.ERROR_OPERATION_ABORTED {
if f.closing.isSet() {
err = ErrFileClosed
}
} else if err != nil && f.socket {
// err is from Win32. Query the overlapped structure to get the winsock error.
var bytes, flags uint32
err = wsaGetOverlappedResult(f.handle, &c.o, &bytes, false, &flags)
}
case <-timeout:
cancelIoEx(f.handle, &c.o)
r = <-c.ch
err = r.err
if err == syscall.ERROR_OPERATION_ABORTED {
err = ErrTimeout
}
}
// runtime.KeepAlive is needed, as c is passed via native
// code to ioCompletionProcessor, c must remain alive
// until the channel read is complete.
runtime.KeepAlive(c)
return int(r.bytes), err
}
// Read reads from a file handle.
func (f *win32File) Read(b []byte) (int, error) {
c, err := f.prepareIo()
if err != nil {
return 0, err
}
defer f.wg.Done()
if f.readDeadline.timedout.isSet() {
return 0, ErrTimeout
}
var bytes uint32
err = syscall.ReadFile(f.handle, b, &bytes, &c.o)
n, err := f.asyncIo(c, &f.readDeadline, bytes, err)
runtime.KeepAlive(b)
// Handle EOF conditions.
if err == nil && n == 0 && len(b) != 0 {
return 0, io.EOF
} else if err == syscall.ERROR_BROKEN_PIPE {
return 0, io.EOF
} else {
return n, err
}
}
// Write writes to a file handle.
func (f *win32File) Write(b []byte) (int, error) {
c, err := f.prepareIo()
if err != nil {
return 0, err
}
defer f.wg.Done()
if f.writeDeadline.timedout.isSet() {
return 0, ErrTimeout
}
var bytes uint32
err = syscall.WriteFile(f.handle, b, &bytes, &c.o)
n, err := f.asyncIo(c, &f.writeDeadline, bytes, err)
runtime.KeepAlive(b)
return n, err
}
func (f *win32File) SetReadDeadline(deadline time.Time) error {
return f.readDeadline.set(deadline)
}
func (f *win32File) SetWriteDeadline(deadline time.Time) error {
return f.writeDeadline.set(deadline)
}
func (f *win32File) Flush() error {
return syscall.FlushFileBuffers(f.handle)
}
func (f *win32File) Fd() uintptr {
return uintptr(f.handle)
}
func (d *deadlineHandler) set(deadline time.Time) error {
d.setLock.Lock()
defer d.setLock.Unlock()
if d.timer != nil {
if !d.timer.Stop() {
<-d.channel
}
d.timer = nil
}
d.timedout.setFalse()
select {
case <-d.channel:
d.channelLock.Lock()
d.channel = make(chan struct{})
d.channelLock.Unlock()
default:
}
if deadline.IsZero() {
return nil
}
timeoutIO := func() {
d.timedout.setTrue()
close(d.channel)
}
now := time.Now()
duration := deadline.Sub(now)
if deadline.After(now) {
// Deadline is in the future, set a timer to wait
d.timer = time.AfterFunc(duration, timeoutIO)
} else {
// Deadline is in the past. Cancel all pending IO now.
timeoutIO()
}
return nil
}

73
vendor/github.com/Microsoft/go-winio/fileinfo.go generated vendored Normal file
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@@ -0,0 +1,73 @@
// +build windows
package winio
import (
"os"
"runtime"
"unsafe"
"golang.org/x/sys/windows"
)
// FileBasicInfo contains file access time and file attributes information.
type FileBasicInfo struct {
CreationTime, LastAccessTime, LastWriteTime, ChangeTime windows.Filetime
FileAttributes uint32
pad uint32 // padding
}
// GetFileBasicInfo retrieves times and attributes for a file.
func GetFileBasicInfo(f *os.File) (*FileBasicInfo, error) {
bi := &FileBasicInfo{}
if err := windows.GetFileInformationByHandleEx(windows.Handle(f.Fd()), windows.FileBasicInfo, (*byte)(unsafe.Pointer(bi)), uint32(unsafe.Sizeof(*bi))); err != nil {
return nil, &os.PathError{Op: "GetFileInformationByHandleEx", Path: f.Name(), Err: err}
}
runtime.KeepAlive(f)
return bi, nil
}
// SetFileBasicInfo sets times and attributes for a file.
func SetFileBasicInfo(f *os.File, bi *FileBasicInfo) error {
if err := windows.SetFileInformationByHandle(windows.Handle(f.Fd()), windows.FileBasicInfo, (*byte)(unsafe.Pointer(bi)), uint32(unsafe.Sizeof(*bi))); err != nil {
return &os.PathError{Op: "SetFileInformationByHandle", Path: f.Name(), Err: err}
}
runtime.KeepAlive(f)
return nil
}
// FileStandardInfo contains extended information for the file.
// FILE_STANDARD_INFO in WinBase.h
// https://docs.microsoft.com/en-us/windows/win32/api/winbase/ns-winbase-file_standard_info
type FileStandardInfo struct {
AllocationSize, EndOfFile int64
NumberOfLinks uint32
DeletePending, Directory bool
}
// GetFileStandardInfo retrieves ended information for the file.
func GetFileStandardInfo(f *os.File) (*FileStandardInfo, error) {
si := &FileStandardInfo{}
if err := windows.GetFileInformationByHandleEx(windows.Handle(f.Fd()), windows.FileStandardInfo, (*byte)(unsafe.Pointer(si)), uint32(unsafe.Sizeof(*si))); err != nil {
return nil, &os.PathError{Op: "GetFileInformationByHandleEx", Path: f.Name(), Err: err}
}
runtime.KeepAlive(f)
return si, nil
}
// FileIDInfo contains the volume serial number and file ID for a file. This pair should be
// unique on a system.
type FileIDInfo struct {
VolumeSerialNumber uint64
FileID [16]byte
}
// GetFileID retrieves the unique (volume, file ID) pair for a file.
func GetFileID(f *os.File) (*FileIDInfo, error) {
fileID := &FileIDInfo{}
if err := windows.GetFileInformationByHandleEx(windows.Handle(f.Fd()), windows.FileIdInfo, (*byte)(unsafe.Pointer(fileID)), uint32(unsafe.Sizeof(*fileID))); err != nil {
return nil, &os.PathError{Op: "GetFileInformationByHandleEx", Path: f.Name(), Err: err}
}
runtime.KeepAlive(f)
return fileID, nil
}

316
vendor/github.com/Microsoft/go-winio/hvsock.go generated vendored Normal file
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@@ -0,0 +1,316 @@
//go:build windows
// +build windows
package winio
import (
"fmt"
"io"
"net"
"os"
"syscall"
"time"
"unsafe"
"github.com/Microsoft/go-winio/pkg/guid"
)
//sys bind(s syscall.Handle, name unsafe.Pointer, namelen int32) (err error) [failretval==socketError] = ws2_32.bind
const (
afHvSock = 34 // AF_HYPERV
socketError = ^uintptr(0)
)
// An HvsockAddr is an address for a AF_HYPERV socket.
type HvsockAddr struct {
VMID guid.GUID
ServiceID guid.GUID
}
type rawHvsockAddr struct {
Family uint16
_ uint16
VMID guid.GUID
ServiceID guid.GUID
}
// Network returns the address's network name, "hvsock".
func (addr *HvsockAddr) Network() string {
return "hvsock"
}
func (addr *HvsockAddr) String() string {
return fmt.Sprintf("%s:%s", &addr.VMID, &addr.ServiceID)
}
// VsockServiceID returns an hvsock service ID corresponding to the specified AF_VSOCK port.
func VsockServiceID(port uint32) guid.GUID {
g, _ := guid.FromString("00000000-facb-11e6-bd58-64006a7986d3")
g.Data1 = port
return g
}
func (addr *HvsockAddr) raw() rawHvsockAddr {
return rawHvsockAddr{
Family: afHvSock,
VMID: addr.VMID,
ServiceID: addr.ServiceID,
}
}
func (addr *HvsockAddr) fromRaw(raw *rawHvsockAddr) {
addr.VMID = raw.VMID
addr.ServiceID = raw.ServiceID
}
// HvsockListener is a socket listener for the AF_HYPERV address family.
type HvsockListener struct {
sock *win32File
addr HvsockAddr
}
// HvsockConn is a connected socket of the AF_HYPERV address family.
type HvsockConn struct {
sock *win32File
local, remote HvsockAddr
}
func newHvSocket() (*win32File, error) {
fd, err := syscall.Socket(afHvSock, syscall.SOCK_STREAM, 1)
if err != nil {
return nil, os.NewSyscallError("socket", err)
}
f, err := makeWin32File(fd)
if err != nil {
syscall.Close(fd)
return nil, err
}
f.socket = true
return f, nil
}
// ListenHvsock listens for connections on the specified hvsock address.
func ListenHvsock(addr *HvsockAddr) (_ *HvsockListener, err error) {
l := &HvsockListener{addr: *addr}
sock, err := newHvSocket()
if err != nil {
return nil, l.opErr("listen", err)
}
sa := addr.raw()
err = bind(sock.handle, unsafe.Pointer(&sa), int32(unsafe.Sizeof(sa)))
if err != nil {
return nil, l.opErr("listen", os.NewSyscallError("socket", err))
}
err = syscall.Listen(sock.handle, 16)
if err != nil {
return nil, l.opErr("listen", os.NewSyscallError("listen", err))
}
return &HvsockListener{sock: sock, addr: *addr}, nil
}
func (l *HvsockListener) opErr(op string, err error) error {
return &net.OpError{Op: op, Net: "hvsock", Addr: &l.addr, Err: err}
}
// Addr returns the listener's network address.
func (l *HvsockListener) Addr() net.Addr {
return &l.addr
}
// Accept waits for the next connection and returns it.
func (l *HvsockListener) Accept() (_ net.Conn, err error) {
sock, err := newHvSocket()
if err != nil {
return nil, l.opErr("accept", err)
}
defer func() {
if sock != nil {
sock.Close()
}
}()
c, err := l.sock.prepareIo()
if err != nil {
return nil, l.opErr("accept", err)
}
defer l.sock.wg.Done()
// AcceptEx, per documentation, requires an extra 16 bytes per address.
const addrlen = uint32(16 + unsafe.Sizeof(rawHvsockAddr{}))
var addrbuf [addrlen * 2]byte
var bytes uint32
err = syscall.AcceptEx(l.sock.handle, sock.handle, &addrbuf[0], 0, addrlen, addrlen, &bytes, &c.o)
_, err = l.sock.asyncIo(c, nil, bytes, err)
if err != nil {
return nil, l.opErr("accept", os.NewSyscallError("acceptex", err))
}
conn := &HvsockConn{
sock: sock,
}
conn.local.fromRaw((*rawHvsockAddr)(unsafe.Pointer(&addrbuf[0])))
conn.remote.fromRaw((*rawHvsockAddr)(unsafe.Pointer(&addrbuf[addrlen])))
sock = nil
return conn, nil
}
// Close closes the listener, causing any pending Accept calls to fail.
func (l *HvsockListener) Close() error {
return l.sock.Close()
}
/* Need to finish ConnectEx handling
func DialHvsock(ctx context.Context, addr *HvsockAddr) (*HvsockConn, error) {
sock, err := newHvSocket()
if err != nil {
return nil, err
}
defer func() {
if sock != nil {
sock.Close()
}
}()
c, err := sock.prepareIo()
if err != nil {
return nil, err
}
defer sock.wg.Done()
var bytes uint32
err = windows.ConnectEx(windows.Handle(sock.handle), sa, nil, 0, &bytes, &c.o)
_, err = sock.asyncIo(ctx, c, nil, bytes, err)
if err != nil {
return nil, err
}
conn := &HvsockConn{
sock: sock,
remote: *addr,
}
sock = nil
return conn, nil
}
*/
func (conn *HvsockConn) opErr(op string, err error) error {
return &net.OpError{Op: op, Net: "hvsock", Source: &conn.local, Addr: &conn.remote, Err: err}
}
func (conn *HvsockConn) Read(b []byte) (int, error) {
c, err := conn.sock.prepareIo()
if err != nil {
return 0, conn.opErr("read", err)
}
defer conn.sock.wg.Done()
buf := syscall.WSABuf{Buf: &b[0], Len: uint32(len(b))}
var flags, bytes uint32
err = syscall.WSARecv(conn.sock.handle, &buf, 1, &bytes, &flags, &c.o, nil)
n, err := conn.sock.asyncIo(c, &conn.sock.readDeadline, bytes, err)
if err != nil {
if _, ok := err.(syscall.Errno); ok {
err = os.NewSyscallError("wsarecv", err)
}
return 0, conn.opErr("read", err)
} else if n == 0 {
err = io.EOF
}
return n, err
}
func (conn *HvsockConn) Write(b []byte) (int, error) {
t := 0
for len(b) != 0 {
n, err := conn.write(b)
if err != nil {
return t + n, err
}
t += n
b = b[n:]
}
return t, nil
}
func (conn *HvsockConn) write(b []byte) (int, error) {
c, err := conn.sock.prepareIo()
if err != nil {
return 0, conn.opErr("write", err)
}
defer conn.sock.wg.Done()
buf := syscall.WSABuf{Buf: &b[0], Len: uint32(len(b))}
var bytes uint32
err = syscall.WSASend(conn.sock.handle, &buf, 1, &bytes, 0, &c.o, nil)
n, err := conn.sock.asyncIo(c, &conn.sock.writeDeadline, bytes, err)
if err != nil {
if _, ok := err.(syscall.Errno); ok {
err = os.NewSyscallError("wsasend", err)
}
return 0, conn.opErr("write", err)
}
return n, err
}
// Close closes the socket connection, failing any pending read or write calls.
func (conn *HvsockConn) Close() error {
return conn.sock.Close()
}
func (conn *HvsockConn) IsClosed() bool {
return conn.sock.IsClosed()
}
func (conn *HvsockConn) shutdown(how int) error {
if conn.IsClosed() {
return ErrFileClosed
}
err := syscall.Shutdown(conn.sock.handle, how)
if err != nil {
return os.NewSyscallError("shutdown", err)
}
return nil
}
// CloseRead shuts down the read end of the socket, preventing future read operations.
func (conn *HvsockConn) CloseRead() error {
err := conn.shutdown(syscall.SHUT_RD)
if err != nil {
return conn.opErr("close", err)
}
return nil
}
// CloseWrite shuts down the write end of the socket, preventing future write operations and
// notifying the other endpoint that no more data will be written.
func (conn *HvsockConn) CloseWrite() error {
err := conn.shutdown(syscall.SHUT_WR)
if err != nil {
return conn.opErr("close", err)
}
return nil
}
// LocalAddr returns the local address of the connection.
func (conn *HvsockConn) LocalAddr() net.Addr {
return &conn.local
}
// RemoteAddr returns the remote address of the connection.
func (conn *HvsockConn) RemoteAddr() net.Addr {
return &conn.remote
}
// SetDeadline implements the net.Conn SetDeadline method.
func (conn *HvsockConn) SetDeadline(t time.Time) error {
conn.SetReadDeadline(t)
conn.SetWriteDeadline(t)
return nil
}
// SetReadDeadline implements the net.Conn SetReadDeadline method.
func (conn *HvsockConn) SetReadDeadline(t time.Time) error {
return conn.sock.SetReadDeadline(t)
}
// SetWriteDeadline implements the net.Conn SetWriteDeadline method.
func (conn *HvsockConn) SetWriteDeadline(t time.Time) error {
return conn.sock.SetWriteDeadline(t)
}

517
vendor/github.com/Microsoft/go-winio/pipe.go generated vendored Normal file
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@@ -0,0 +1,517 @@
// +build windows
package winio
import (
"context"
"errors"
"fmt"
"io"
"net"
"os"
"runtime"
"syscall"
"time"
"unsafe"
)
//sys connectNamedPipe(pipe syscall.Handle, o *syscall.Overlapped) (err error) = ConnectNamedPipe
//sys createNamedPipe(name string, flags uint32, pipeMode uint32, maxInstances uint32, outSize uint32, inSize uint32, defaultTimeout uint32, sa *syscall.SecurityAttributes) (handle syscall.Handle, err error) [failretval==syscall.InvalidHandle] = CreateNamedPipeW
//sys createFile(name string, access uint32, mode uint32, sa *syscall.SecurityAttributes, createmode uint32, attrs uint32, templatefile syscall.Handle) (handle syscall.Handle, err error) [failretval==syscall.InvalidHandle] = CreateFileW
//sys getNamedPipeInfo(pipe syscall.Handle, flags *uint32, outSize *uint32, inSize *uint32, maxInstances *uint32) (err error) = GetNamedPipeInfo
//sys getNamedPipeHandleState(pipe syscall.Handle, state *uint32, curInstances *uint32, maxCollectionCount *uint32, collectDataTimeout *uint32, userName *uint16, maxUserNameSize uint32) (err error) = GetNamedPipeHandleStateW
//sys localAlloc(uFlags uint32, length uint32) (ptr uintptr) = LocalAlloc
//sys ntCreateNamedPipeFile(pipe *syscall.Handle, access uint32, oa *objectAttributes, iosb *ioStatusBlock, share uint32, disposition uint32, options uint32, typ uint32, readMode uint32, completionMode uint32, maxInstances uint32, inboundQuota uint32, outputQuota uint32, timeout *int64) (status ntstatus) = ntdll.NtCreateNamedPipeFile
//sys rtlNtStatusToDosError(status ntstatus) (winerr error) = ntdll.RtlNtStatusToDosErrorNoTeb
//sys rtlDosPathNameToNtPathName(name *uint16, ntName *unicodeString, filePart uintptr, reserved uintptr) (status ntstatus) = ntdll.RtlDosPathNameToNtPathName_U
//sys rtlDefaultNpAcl(dacl *uintptr) (status ntstatus) = ntdll.RtlDefaultNpAcl
type ioStatusBlock struct {
Status, Information uintptr
}
type objectAttributes struct {
Length uintptr
RootDirectory uintptr
ObjectName *unicodeString
Attributes uintptr
SecurityDescriptor *securityDescriptor
SecurityQoS uintptr
}
type unicodeString struct {
Length uint16
MaximumLength uint16
Buffer uintptr
}
type securityDescriptor struct {
Revision byte
Sbz1 byte
Control uint16
Owner uintptr
Group uintptr
Sacl uintptr
Dacl uintptr
}
type ntstatus int32
func (status ntstatus) Err() error {
if status >= 0 {
return nil
}
return rtlNtStatusToDosError(status)
}
const (
cERROR_PIPE_BUSY = syscall.Errno(231)
cERROR_NO_DATA = syscall.Errno(232)
cERROR_PIPE_CONNECTED = syscall.Errno(535)
cERROR_SEM_TIMEOUT = syscall.Errno(121)
cSECURITY_SQOS_PRESENT = 0x100000
cSECURITY_ANONYMOUS = 0
cPIPE_TYPE_MESSAGE = 4
cPIPE_READMODE_MESSAGE = 2
cFILE_OPEN = 1
cFILE_CREATE = 2
cFILE_PIPE_MESSAGE_TYPE = 1
cFILE_PIPE_REJECT_REMOTE_CLIENTS = 2
cSE_DACL_PRESENT = 4
)
var (
// ErrPipeListenerClosed is returned for pipe operations on listeners that have been closed.
// This error should match net.errClosing since docker takes a dependency on its text.
ErrPipeListenerClosed = errors.New("use of closed network connection")
errPipeWriteClosed = errors.New("pipe has been closed for write")
)
type win32Pipe struct {
*win32File
path string
}
type win32MessageBytePipe struct {
win32Pipe
writeClosed bool
readEOF bool
}
type pipeAddress string
func (f *win32Pipe) LocalAddr() net.Addr {
return pipeAddress(f.path)
}
func (f *win32Pipe) RemoteAddr() net.Addr {
return pipeAddress(f.path)
}
func (f *win32Pipe) SetDeadline(t time.Time) error {
f.SetReadDeadline(t)
f.SetWriteDeadline(t)
return nil
}
// CloseWrite closes the write side of a message pipe in byte mode.
func (f *win32MessageBytePipe) CloseWrite() error {
if f.writeClosed {
return errPipeWriteClosed
}
err := f.win32File.Flush()
if err != nil {
return err
}
_, err = f.win32File.Write(nil)
if err != nil {
return err
}
f.writeClosed = true
return nil
}
// Write writes bytes to a message pipe in byte mode. Zero-byte writes are ignored, since
// they are used to implement CloseWrite().
func (f *win32MessageBytePipe) Write(b []byte) (int, error) {
if f.writeClosed {
return 0, errPipeWriteClosed
}
if len(b) == 0 {
return 0, nil
}
return f.win32File.Write(b)
}
// Read reads bytes from a message pipe in byte mode. A read of a zero-byte message on a message
// mode pipe will return io.EOF, as will all subsequent reads.
func (f *win32MessageBytePipe) Read(b []byte) (int, error) {
if f.readEOF {
return 0, io.EOF
}
n, err := f.win32File.Read(b)
if err == io.EOF {
// If this was the result of a zero-byte read, then
// it is possible that the read was due to a zero-size
// message. Since we are simulating CloseWrite with a
// zero-byte message, ensure that all future Read() calls
// also return EOF.
f.readEOF = true
} else if err == syscall.ERROR_MORE_DATA {
// ERROR_MORE_DATA indicates that the pipe's read mode is message mode
// and the message still has more bytes. Treat this as a success, since
// this package presents all named pipes as byte streams.
err = nil
}
return n, err
}
func (s pipeAddress) Network() string {
return "pipe"
}
func (s pipeAddress) String() string {
return string(s)
}
// tryDialPipe attempts to dial the pipe at `path` until `ctx` cancellation or timeout.
func tryDialPipe(ctx context.Context, path *string, access uint32) (syscall.Handle, error) {
for {
select {
case <-ctx.Done():
return syscall.Handle(0), ctx.Err()
default:
h, err := createFile(*path, access, 0, nil, syscall.OPEN_EXISTING, syscall.FILE_FLAG_OVERLAPPED|cSECURITY_SQOS_PRESENT|cSECURITY_ANONYMOUS, 0)
if err == nil {
return h, nil
}
if err != cERROR_PIPE_BUSY {
return h, &os.PathError{Err: err, Op: "open", Path: *path}
}
// Wait 10 msec and try again. This is a rather simplistic
// view, as we always try each 10 milliseconds.
time.Sleep(10 * time.Millisecond)
}
}
}
// DialPipe connects to a named pipe by path, timing out if the connection
// takes longer than the specified duration. If timeout is nil, then we use
// a default timeout of 2 seconds. (We do not use WaitNamedPipe.)
func DialPipe(path string, timeout *time.Duration) (net.Conn, error) {
var absTimeout time.Time
if timeout != nil {
absTimeout = time.Now().Add(*timeout)
} else {
absTimeout = time.Now().Add(2 * time.Second)
}
ctx, _ := context.WithDeadline(context.Background(), absTimeout)
conn, err := DialPipeContext(ctx, path)
if err == context.DeadlineExceeded {
return nil, ErrTimeout
}
return conn, err
}
// DialPipeContext attempts to connect to a named pipe by `path` until `ctx`
// cancellation or timeout.
func DialPipeContext(ctx context.Context, path string) (net.Conn, error) {
return DialPipeAccess(ctx, path, syscall.GENERIC_READ|syscall.GENERIC_WRITE)
}
// DialPipeAccess attempts to connect to a named pipe by `path` with `access` until `ctx`
// cancellation or timeout.
func DialPipeAccess(ctx context.Context, path string, access uint32) (net.Conn, error) {
var err error
var h syscall.Handle
h, err = tryDialPipe(ctx, &path, access)
if err != nil {
return nil, err
}
var flags uint32
err = getNamedPipeInfo(h, &flags, nil, nil, nil)
if err != nil {
return nil, err
}
f, err := makeWin32File(h)
if err != nil {
syscall.Close(h)
return nil, err
}
// If the pipe is in message mode, return a message byte pipe, which
// supports CloseWrite().
if flags&cPIPE_TYPE_MESSAGE != 0 {
return &win32MessageBytePipe{
win32Pipe: win32Pipe{win32File: f, path: path},
}, nil
}
return &win32Pipe{win32File: f, path: path}, nil
}
type acceptResponse struct {
f *win32File
err error
}
type win32PipeListener struct {
firstHandle syscall.Handle
path string
config PipeConfig
acceptCh chan (chan acceptResponse)
closeCh chan int
doneCh chan int
}
func makeServerPipeHandle(path string, sd []byte, c *PipeConfig, first bool) (syscall.Handle, error) {
path16, err := syscall.UTF16FromString(path)
if err != nil {
return 0, &os.PathError{Op: "open", Path: path, Err: err}
}
var oa objectAttributes
oa.Length = unsafe.Sizeof(oa)
var ntPath unicodeString
if err := rtlDosPathNameToNtPathName(&path16[0], &ntPath, 0, 0).Err(); err != nil {
return 0, &os.PathError{Op: "open", Path: path, Err: err}
}
defer localFree(ntPath.Buffer)
oa.ObjectName = &ntPath
// The security descriptor is only needed for the first pipe.
if first {
if sd != nil {
len := uint32(len(sd))
sdb := localAlloc(0, len)
defer localFree(sdb)
copy((*[0xffff]byte)(unsafe.Pointer(sdb))[:], sd)
oa.SecurityDescriptor = (*securityDescriptor)(unsafe.Pointer(sdb))
} else {
// Construct the default named pipe security descriptor.
var dacl uintptr
if err := rtlDefaultNpAcl(&dacl).Err(); err != nil {
return 0, fmt.Errorf("getting default named pipe ACL: %s", err)
}
defer localFree(dacl)
sdb := &securityDescriptor{
Revision: 1,
Control: cSE_DACL_PRESENT,
Dacl: dacl,
}
oa.SecurityDescriptor = sdb
}
}
typ := uint32(cFILE_PIPE_REJECT_REMOTE_CLIENTS)
if c.MessageMode {
typ |= cFILE_PIPE_MESSAGE_TYPE
}
disposition := uint32(cFILE_OPEN)
access := uint32(syscall.GENERIC_READ | syscall.GENERIC_WRITE | syscall.SYNCHRONIZE)
if first {
disposition = cFILE_CREATE
// By not asking for read or write access, the named pipe file system
// will put this pipe into an initially disconnected state, blocking
// client connections until the next call with first == false.
access = syscall.SYNCHRONIZE
}
timeout := int64(-50 * 10000) // 50ms
var (
h syscall.Handle
iosb ioStatusBlock
)
err = ntCreateNamedPipeFile(&h, access, &oa, &iosb, syscall.FILE_SHARE_READ|syscall.FILE_SHARE_WRITE, disposition, 0, typ, 0, 0, 0xffffffff, uint32(c.InputBufferSize), uint32(c.OutputBufferSize), &timeout).Err()
if err != nil {
return 0, &os.PathError{Op: "open", Path: path, Err: err}
}
runtime.KeepAlive(ntPath)
return h, nil
}
func (l *win32PipeListener) makeServerPipe() (*win32File, error) {
h, err := makeServerPipeHandle(l.path, nil, &l.config, false)
if err != nil {
return nil, err
}
f, err := makeWin32File(h)
if err != nil {
syscall.Close(h)
return nil, err
}
return f, nil
}
func (l *win32PipeListener) makeConnectedServerPipe() (*win32File, error) {
p, err := l.makeServerPipe()
if err != nil {
return nil, err
}
// Wait for the client to connect.
ch := make(chan error)
go func(p *win32File) {
ch <- connectPipe(p)
}(p)
select {
case err = <-ch:
if err != nil {
p.Close()
p = nil
}
case <-l.closeCh:
// Abort the connect request by closing the handle.
p.Close()
p = nil
err = <-ch
if err == nil || err == ErrFileClosed {
err = ErrPipeListenerClosed
}
}
return p, err
}
func (l *win32PipeListener) listenerRoutine() {
closed := false
for !closed {
select {
case <-l.closeCh:
closed = true
case responseCh := <-l.acceptCh:
var (
p *win32File
err error
)
for {
p, err = l.makeConnectedServerPipe()
// If the connection was immediately closed by the client, try
// again.
if err != cERROR_NO_DATA {
break
}
}
responseCh <- acceptResponse{p, err}
closed = err == ErrPipeListenerClosed
}
}
syscall.Close(l.firstHandle)
l.firstHandle = 0
// Notify Close() and Accept() callers that the handle has been closed.
close(l.doneCh)
}
// PipeConfig contain configuration for the pipe listener.
type PipeConfig struct {
// SecurityDescriptor contains a Windows security descriptor in SDDL format.
SecurityDescriptor string
// MessageMode determines whether the pipe is in byte or message mode. In either
// case the pipe is read in byte mode by default. The only practical difference in
// this implementation is that CloseWrite() is only supported for message mode pipes;
// CloseWrite() is implemented as a zero-byte write, but zero-byte writes are only
// transferred to the reader (and returned as io.EOF in this implementation)
// when the pipe is in message mode.
MessageMode bool
// InputBufferSize specifies the size of the input buffer, in bytes.
InputBufferSize int32
// OutputBufferSize specifies the size of the output buffer, in bytes.
OutputBufferSize int32
}
// ListenPipe creates a listener on a Windows named pipe path, e.g. \\.\pipe\mypipe.
// The pipe must not already exist.
func ListenPipe(path string, c *PipeConfig) (net.Listener, error) {
var (
sd []byte
err error
)
if c == nil {
c = &PipeConfig{}
}
if c.SecurityDescriptor != "" {
sd, err = SddlToSecurityDescriptor(c.SecurityDescriptor)
if err != nil {
return nil, err
}
}
h, err := makeServerPipeHandle(path, sd, c, true)
if err != nil {
return nil, err
}
l := &win32PipeListener{
firstHandle: h,
path: path,
config: *c,
acceptCh: make(chan (chan acceptResponse)),
closeCh: make(chan int),
doneCh: make(chan int),
}
go l.listenerRoutine()
return l, nil
}
func connectPipe(p *win32File) error {
c, err := p.prepareIo()
if err != nil {
return err
}
defer p.wg.Done()
err = connectNamedPipe(p.handle, &c.o)
_, err = p.asyncIo(c, nil, 0, err)
if err != nil && err != cERROR_PIPE_CONNECTED {
return err
}
return nil
}
func (l *win32PipeListener) Accept() (net.Conn, error) {
ch := make(chan acceptResponse)
select {
case l.acceptCh <- ch:
response := <-ch
err := response.err
if err != nil {
return nil, err
}
if l.config.MessageMode {
return &win32MessageBytePipe{
win32Pipe: win32Pipe{win32File: response.f, path: l.path},
}, nil
}
return &win32Pipe{win32File: response.f, path: l.path}, nil
case <-l.doneCh:
return nil, ErrPipeListenerClosed
}
}
func (l *win32PipeListener) Close() error {
select {
case l.closeCh <- 1:
<-l.doneCh
case <-l.doneCh:
}
return nil
}
func (l *win32PipeListener) Addr() net.Addr {
return pipeAddress(l.path)
}

228
vendor/github.com/Microsoft/go-winio/pkg/guid/guid.go generated vendored Normal file
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@@ -0,0 +1,228 @@
// +build windows
// Package guid provides a GUID type. The backing structure for a GUID is
// identical to that used by the golang.org/x/sys/windows GUID type.
// There are two main binary encodings used for a GUID, the big-endian encoding,
// and the Windows (mixed-endian) encoding. See here for details:
// https://en.wikipedia.org/wiki/Universally_unique_identifier#Encoding
package guid
import (
"crypto/rand"
"crypto/sha1"
"encoding"
"encoding/binary"
"fmt"
"strconv"
)
// Variant specifies which GUID variant (or "type") of the GUID. It determines
// how the entirety of the rest of the GUID is interpreted.
type Variant uint8
// The variants specified by RFC 4122.
const (
// VariantUnknown specifies a GUID variant which does not conform to one of
// the variant encodings specified in RFC 4122.
VariantUnknown Variant = iota
VariantNCS
VariantRFC4122
VariantMicrosoft
VariantFuture
)
// Version specifies how the bits in the GUID were generated. For instance, a
// version 4 GUID is randomly generated, and a version 5 is generated from the
// hash of an input string.
type Version uint8
var _ = (encoding.TextMarshaler)(GUID{})
var _ = (encoding.TextUnmarshaler)(&GUID{})
// NewV4 returns a new version 4 (pseudorandom) GUID, as defined by RFC 4122.
func NewV4() (GUID, error) {
var b [16]byte
if _, err := rand.Read(b[:]); err != nil {
return GUID{}, err
}
g := FromArray(b)
g.setVersion(4) // Version 4 means randomly generated.
g.setVariant(VariantRFC4122)
return g, nil
}
// NewV5 returns a new version 5 (generated from a string via SHA-1 hashing)
// GUID, as defined by RFC 4122. The RFC is unclear on the encoding of the name,
// and the sample code treats it as a series of bytes, so we do the same here.
//
// Some implementations, such as those found on Windows, treat the name as a
// big-endian UTF16 stream of bytes. If that is desired, the string can be
// encoded as such before being passed to this function.
func NewV5(namespace GUID, name []byte) (GUID, error) {
b := sha1.New()
namespaceBytes := namespace.ToArray()
b.Write(namespaceBytes[:])
b.Write(name)
a := [16]byte{}
copy(a[:], b.Sum(nil))
g := FromArray(a)
g.setVersion(5) // Version 5 means generated from a string.
g.setVariant(VariantRFC4122)
return g, nil
}
func fromArray(b [16]byte, order binary.ByteOrder) GUID {
var g GUID
g.Data1 = order.Uint32(b[0:4])
g.Data2 = order.Uint16(b[4:6])
g.Data3 = order.Uint16(b[6:8])
copy(g.Data4[:], b[8:16])
return g
}
func (g GUID) toArray(order binary.ByteOrder) [16]byte {
b := [16]byte{}
order.PutUint32(b[0:4], g.Data1)
order.PutUint16(b[4:6], g.Data2)
order.PutUint16(b[6:8], g.Data3)
copy(b[8:16], g.Data4[:])
return b
}
// FromArray constructs a GUID from a big-endian encoding array of 16 bytes.
func FromArray(b [16]byte) GUID {
return fromArray(b, binary.BigEndian)
}
// ToArray returns an array of 16 bytes representing the GUID in big-endian
// encoding.
func (g GUID) ToArray() [16]byte {
return g.toArray(binary.BigEndian)
}
// FromWindowsArray constructs a GUID from a Windows encoding array of bytes.
func FromWindowsArray(b [16]byte) GUID {
return fromArray(b, binary.LittleEndian)
}
// ToWindowsArray returns an array of 16 bytes representing the GUID in Windows
// encoding.
func (g GUID) ToWindowsArray() [16]byte {
return g.toArray(binary.LittleEndian)
}
func (g GUID) String() string {
return fmt.Sprintf(
"%08x-%04x-%04x-%04x-%012x",
g.Data1,
g.Data2,
g.Data3,
g.Data4[:2],
g.Data4[2:])
}
// FromString parses a string containing a GUID and returns the GUID. The only
// format currently supported is the `xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx`
// format.
func FromString(s string) (GUID, error) {
if len(s) != 36 {
return GUID{}, fmt.Errorf("invalid GUID %q", s)
}
if s[8] != '-' || s[13] != '-' || s[18] != '-' || s[23] != '-' {
return GUID{}, fmt.Errorf("invalid GUID %q", s)
}
var g GUID
data1, err := strconv.ParseUint(s[0:8], 16, 32)
if err != nil {
return GUID{}, fmt.Errorf("invalid GUID %q", s)
}
g.Data1 = uint32(data1)
data2, err := strconv.ParseUint(s[9:13], 16, 16)
if err != nil {
return GUID{}, fmt.Errorf("invalid GUID %q", s)
}
g.Data2 = uint16(data2)
data3, err := strconv.ParseUint(s[14:18], 16, 16)
if err != nil {
return GUID{}, fmt.Errorf("invalid GUID %q", s)
}
g.Data3 = uint16(data3)
for i, x := range []int{19, 21, 24, 26, 28, 30, 32, 34} {
v, err := strconv.ParseUint(s[x:x+2], 16, 8)
if err != nil {
return GUID{}, fmt.Errorf("invalid GUID %q", s)
}
g.Data4[i] = uint8(v)
}
return g, nil
}
func (g *GUID) setVariant(v Variant) {
d := g.Data4[0]
switch v {
case VariantNCS:
d = (d & 0x7f)
case VariantRFC4122:
d = (d & 0x3f) | 0x80
case VariantMicrosoft:
d = (d & 0x1f) | 0xc0
case VariantFuture:
d = (d & 0x0f) | 0xe0
case VariantUnknown:
fallthrough
default:
panic(fmt.Sprintf("invalid variant: %d", v))
}
g.Data4[0] = d
}
// Variant returns the GUID variant, as defined in RFC 4122.
func (g GUID) Variant() Variant {
b := g.Data4[0]
if b&0x80 == 0 {
return VariantNCS
} else if b&0xc0 == 0x80 {
return VariantRFC4122
} else if b&0xe0 == 0xc0 {
return VariantMicrosoft
} else if b&0xe0 == 0xe0 {
return VariantFuture
}
return VariantUnknown
}
func (g *GUID) setVersion(v Version) {
g.Data3 = (g.Data3 & 0x0fff) | (uint16(v) << 12)
}
// Version returns the GUID version, as defined in RFC 4122.
func (g GUID) Version() Version {
return Version((g.Data3 & 0xF000) >> 12)
}
// MarshalText returns the textual representation of the GUID.
func (g GUID) MarshalText() ([]byte, error) {
return []byte(g.String()), nil
}
// UnmarshalText takes the textual representation of a GUID, and unmarhals it
// into this GUID.
func (g *GUID) UnmarshalText(text []byte) error {
g2, err := FromString(string(text))
if err != nil {
return err
}
*g = g2
return nil
}

15
vendor/github.com/Microsoft/go-winio/pkg/guid/guid_nonwindows.go generated vendored Normal file
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@@ -0,0 +1,15 @@
// +build !windows
package guid
// GUID represents a GUID/UUID. It has the same structure as
// golang.org/x/sys/windows.GUID so that it can be used with functions expecting
// that type. It is defined as its own type as that is only available to builds
// targeted at `windows`. The representation matches that used by native Windows
// code.
type GUID struct {
Data1 uint32
Data2 uint16
Data3 uint16
Data4 [8]byte
}

10
vendor/github.com/Microsoft/go-winio/pkg/guid/guid_windows.go generated vendored Normal file
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@@ -0,0 +1,10 @@
package guid
import "golang.org/x/sys/windows"
// GUID represents a GUID/UUID. It has the same structure as
// golang.org/x/sys/windows.GUID so that it can be used with functions expecting
// that type. It is defined as its own type so that stringification and
// marshaling can be supported. The representation matches that used by native
// Windows code.
type GUID windows.GUID

203
vendor/github.com/Microsoft/go-winio/privilege.go generated vendored Normal file
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@@ -0,0 +1,203 @@
// +build windows
package winio
import (
"bytes"
"encoding/binary"
"fmt"
"runtime"
"sync"
"syscall"
"unicode/utf16"
"golang.org/x/sys/windows"
)
//sys adjustTokenPrivileges(token windows.Token, releaseAll bool, input *byte, outputSize uint32, output *byte, requiredSize *uint32) (success bool, err error) [true] = advapi32.AdjustTokenPrivileges
//sys impersonateSelf(level uint32) (err error) = advapi32.ImpersonateSelf
//sys revertToSelf() (err error) = advapi32.RevertToSelf
//sys openThreadToken(thread syscall.Handle, accessMask uint32, openAsSelf bool, token *windows.Token) (err error) = advapi32.OpenThreadToken
//sys getCurrentThread() (h syscall.Handle) = GetCurrentThread
//sys lookupPrivilegeValue(systemName string, name string, luid *uint64) (err error) = advapi32.LookupPrivilegeValueW
//sys lookupPrivilegeName(systemName string, luid *uint64, buffer *uint16, size *uint32) (err error) = advapi32.LookupPrivilegeNameW
//sys lookupPrivilegeDisplayName(systemName string, name *uint16, buffer *uint16, size *uint32, languageId *uint32) (err error) = advapi32.LookupPrivilegeDisplayNameW
const (
SE_PRIVILEGE_ENABLED = 2
ERROR_NOT_ALL_ASSIGNED syscall.Errno = 1300
SeBackupPrivilege = "SeBackupPrivilege"
SeRestorePrivilege = "SeRestorePrivilege"
SeSecurityPrivilege = "SeSecurityPrivilege"
)
const (
securityAnonymous = iota
securityIdentification
securityImpersonation
securityDelegation
)
var (
privNames = make(map[string]uint64)
privNameMutex sync.Mutex
)
// PrivilegeError represents an error enabling privileges.
type PrivilegeError struct {
privileges []uint64
}
func (e *PrivilegeError) Error() string {
s := ""
if len(e.privileges) > 1 {
s = "Could not enable privileges "
} else {
s = "Could not enable privilege "
}
for i, p := range e.privileges {
if i != 0 {
s += ", "
}
s += `"`
s += getPrivilegeName(p)
s += `"`
}
return s
}
// RunWithPrivilege enables a single privilege for a function call.
func RunWithPrivilege(name string, fn func() error) error {
return RunWithPrivileges([]string{name}, fn)
}
// RunWithPrivileges enables privileges for a function call.
func RunWithPrivileges(names []string, fn func() error) error {
privileges, err := mapPrivileges(names)
if err != nil {
return err
}
runtime.LockOSThread()
defer runtime.UnlockOSThread()
token, err := newThreadToken()
if err != nil {
return err
}
defer releaseThreadToken(token)
err = adjustPrivileges(token, privileges, SE_PRIVILEGE_ENABLED)
if err != nil {
return err
}
return fn()
}
func mapPrivileges(names []string) ([]uint64, error) {
var privileges []uint64
privNameMutex.Lock()
defer privNameMutex.Unlock()
for _, name := range names {
p, ok := privNames[name]
if !ok {
err := lookupPrivilegeValue("", name, &p)
if err != nil {
return nil, err
}
privNames[name] = p
}
privileges = append(privileges, p)
}
return privileges, nil
}
// EnableProcessPrivileges enables privileges globally for the process.
func EnableProcessPrivileges(names []string) error {
return enableDisableProcessPrivilege(names, SE_PRIVILEGE_ENABLED)
}
// DisableProcessPrivileges disables privileges globally for the process.
func DisableProcessPrivileges(names []string) error {
return enableDisableProcessPrivilege(names, 0)
}
func enableDisableProcessPrivilege(names []string, action uint32) error {
privileges, err := mapPrivileges(names)
if err != nil {
return err
}
p, _ := windows.GetCurrentProcess()
var token windows.Token
err = windows.OpenProcessToken(p, windows.TOKEN_ADJUST_PRIVILEGES|windows.TOKEN_QUERY, &token)
if err != nil {
return err
}
defer token.Close()
return adjustPrivileges(token, privileges, action)
}
func adjustPrivileges(token windows.Token, privileges []uint64, action uint32) error {
var b bytes.Buffer
binary.Write(&b, binary.LittleEndian, uint32(len(privileges)))
for _, p := range privileges {
binary.Write(&b, binary.LittleEndian, p)
binary.Write(&b, binary.LittleEndian, action)
}
prevState := make([]byte, b.Len())
reqSize := uint32(0)
success, err := adjustTokenPrivileges(token, false, &b.Bytes()[0], uint32(len(prevState)), &prevState[0], &reqSize)
if !success {
return err
}
if err == ERROR_NOT_ALL_ASSIGNED {
return &PrivilegeError{privileges}
}
return nil
}
func getPrivilegeName(luid uint64) string {
var nameBuffer [256]uint16
bufSize := uint32(len(nameBuffer))
err := lookupPrivilegeName("", &luid, &nameBuffer[0], &bufSize)
if err != nil {
return fmt.Sprintf("<unknown privilege %d>", luid)
}
var displayNameBuffer [256]uint16
displayBufSize := uint32(len(displayNameBuffer))
var langID uint32
err = lookupPrivilegeDisplayName("", &nameBuffer[0], &displayNameBuffer[0], &displayBufSize, &langID)
if err != nil {
return fmt.Sprintf("<unknown privilege %s>", string(utf16.Decode(nameBuffer[:bufSize])))
}
return string(utf16.Decode(displayNameBuffer[:displayBufSize]))
}
func newThreadToken() (windows.Token, error) {
err := impersonateSelf(securityImpersonation)
if err != nil {
return 0, err
}
var token windows.Token
err = openThreadToken(getCurrentThread(), syscall.TOKEN_ADJUST_PRIVILEGES|syscall.TOKEN_QUERY, false, &token)
if err != nil {
rerr := revertToSelf()
if rerr != nil {
panic(rerr)
}
return 0, err
}
return token, nil
}
func releaseThreadToken(h windows.Token) {
err := revertToSelf()
if err != nil {
panic(err)
}
h.Close()
}

128
vendor/github.com/Microsoft/go-winio/reparse.go generated vendored Normal file
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package winio
import (
"bytes"
"encoding/binary"
"fmt"
"strings"
"unicode/utf16"
"unsafe"
)
const (
reparseTagMountPoint = 0xA0000003
reparseTagSymlink = 0xA000000C
)
type reparseDataBuffer struct {
ReparseTag uint32
ReparseDataLength uint16
Reserved uint16
SubstituteNameOffset uint16
SubstituteNameLength uint16
PrintNameOffset uint16
PrintNameLength uint16
}
// ReparsePoint describes a Win32 symlink or mount point.
type ReparsePoint struct {
Target string
IsMountPoint bool
}
// UnsupportedReparsePointError is returned when trying to decode a non-symlink or
// mount point reparse point.
type UnsupportedReparsePointError struct {
Tag uint32
}
func (e *UnsupportedReparsePointError) Error() string {
return fmt.Sprintf("unsupported reparse point %x", e.Tag)
}
// DecodeReparsePoint decodes a Win32 REPARSE_DATA_BUFFER structure containing either a symlink
// or a mount point.
func DecodeReparsePoint(b []byte) (*ReparsePoint, error) {
tag := binary.LittleEndian.Uint32(b[0:4])
return DecodeReparsePointData(tag, b[8:])
}
func DecodeReparsePointData(tag uint32, b []byte) (*ReparsePoint, error) {
isMountPoint := false
switch tag {
case reparseTagMountPoint:
isMountPoint = true
case reparseTagSymlink:
default:
return nil, &UnsupportedReparsePointError{tag}
}
nameOffset := 8 + binary.LittleEndian.Uint16(b[4:6])
if !isMountPoint {
nameOffset += 4
}
nameLength := binary.LittleEndian.Uint16(b[6:8])
name := make([]uint16, nameLength/2)
err := binary.Read(bytes.NewReader(b[nameOffset:nameOffset+nameLength]), binary.LittleEndian, &name)
if err != nil {
return nil, err
}
return &ReparsePoint{string(utf16.Decode(name)), isMountPoint}, nil
}
func isDriveLetter(c byte) bool {
return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z')
}
// EncodeReparsePoint encodes a Win32 REPARSE_DATA_BUFFER structure describing a symlink or
// mount point.
func EncodeReparsePoint(rp *ReparsePoint) []byte {
// Generate an NT path and determine if this is a relative path.
var ntTarget string
relative := false
if strings.HasPrefix(rp.Target, `\\?\`) {
ntTarget = `\??\` + rp.Target[4:]
} else if strings.HasPrefix(rp.Target, `\\`) {
ntTarget = `\??\UNC\` + rp.Target[2:]
} else if len(rp.Target) >= 2 && isDriveLetter(rp.Target[0]) && rp.Target[1] == ':' {
ntTarget = `\??\` + rp.Target
} else {
ntTarget = rp.Target
relative = true
}
// The paths must be NUL-terminated even though they are counted strings.
target16 := utf16.Encode([]rune(rp.Target + "\x00"))
ntTarget16 := utf16.Encode([]rune(ntTarget + "\x00"))
size := int(unsafe.Sizeof(reparseDataBuffer{})) - 8
size += len(ntTarget16)*2 + len(target16)*2
tag := uint32(reparseTagMountPoint)
if !rp.IsMountPoint {
tag = reparseTagSymlink
size += 4 // Add room for symlink flags
}
data := reparseDataBuffer{
ReparseTag: tag,
ReparseDataLength: uint16(size),
SubstituteNameOffset: 0,
SubstituteNameLength: uint16((len(ntTarget16) - 1) * 2),
PrintNameOffset: uint16(len(ntTarget16) * 2),
PrintNameLength: uint16((len(target16) - 1) * 2),
}
var b bytes.Buffer
binary.Write(&b, binary.LittleEndian, &data)
if !rp.IsMountPoint {
flags := uint32(0)
if relative {
flags |= 1
}
binary.Write(&b, binary.LittleEndian, flags)
}
binary.Write(&b, binary.LittleEndian, ntTarget16)
binary.Write(&b, binary.LittleEndian, target16)
return b.Bytes()
}

98
vendor/github.com/Microsoft/go-winio/sd.go generated vendored Normal file
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// +build windows
package winio
import (
"syscall"
"unsafe"
)
//sys lookupAccountName(systemName *uint16, accountName string, sid *byte, sidSize *uint32, refDomain *uint16, refDomainSize *uint32, sidNameUse *uint32) (err error) = advapi32.LookupAccountNameW
//sys convertSidToStringSid(sid *byte, str **uint16) (err error) = advapi32.ConvertSidToStringSidW
//sys convertStringSecurityDescriptorToSecurityDescriptor(str string, revision uint32, sd *uintptr, size *uint32) (err error) = advapi32.ConvertStringSecurityDescriptorToSecurityDescriptorW
//sys convertSecurityDescriptorToStringSecurityDescriptor(sd *byte, revision uint32, secInfo uint32, sddl **uint16, sddlSize *uint32) (err error) = advapi32.ConvertSecurityDescriptorToStringSecurityDescriptorW
//sys localFree(mem uintptr) = LocalFree
//sys getSecurityDescriptorLength(sd uintptr) (len uint32) = advapi32.GetSecurityDescriptorLength
const (
cERROR_NONE_MAPPED = syscall.Errno(1332)
)
type AccountLookupError struct {
Name string
Err error
}
func (e *AccountLookupError) Error() string {
if e.Name == "" {
return "lookup account: empty account name specified"
}
var s string
switch e.Err {
case cERROR_NONE_MAPPED:
s = "not found"
default:
s = e.Err.Error()
}
return "lookup account " + e.Name + ": " + s
}
type SddlConversionError struct {
Sddl string
Err error
}
func (e *SddlConversionError) Error() string {
return "convert " + e.Sddl + ": " + e.Err.Error()
}
// LookupSidByName looks up the SID of an account by name
func LookupSidByName(name string) (sid string, err error) {
if name == "" {
return "", &AccountLookupError{name, cERROR_NONE_MAPPED}
}
var sidSize, sidNameUse, refDomainSize uint32
err = lookupAccountName(nil, name, nil, &sidSize, nil, &refDomainSize, &sidNameUse)
if err != nil && err != syscall.ERROR_INSUFFICIENT_BUFFER {
return "", &AccountLookupError{name, err}
}
sidBuffer := make([]byte, sidSize)
refDomainBuffer := make([]uint16, refDomainSize)
err = lookupAccountName(nil, name, &sidBuffer[0], &sidSize, &refDomainBuffer[0], &refDomainSize, &sidNameUse)
if err != nil {
return "", &AccountLookupError{name, err}
}
var strBuffer *uint16
err = convertSidToStringSid(&sidBuffer[0], &strBuffer)
if err != nil {
return "", &AccountLookupError{name, err}
}
sid = syscall.UTF16ToString((*[0xffff]uint16)(unsafe.Pointer(strBuffer))[:])
localFree(uintptr(unsafe.Pointer(strBuffer)))
return sid, nil
}
func SddlToSecurityDescriptor(sddl string) ([]byte, error) {
var sdBuffer uintptr
err := convertStringSecurityDescriptorToSecurityDescriptor(sddl, 1, &sdBuffer, nil)
if err != nil {
return nil, &SddlConversionError{sddl, err}
}
defer localFree(sdBuffer)
sd := make([]byte, getSecurityDescriptorLength(sdBuffer))
copy(sd, (*[0xffff]byte)(unsafe.Pointer(sdBuffer))[:len(sd)])
return sd, nil
}
func SecurityDescriptorToSddl(sd []byte) (string, error) {
var sddl *uint16
// The returned string length seems to including an aribtrary number of terminating NULs.
// Don't use it.
err := convertSecurityDescriptorToStringSecurityDescriptor(&sd[0], 1, 0xff, &sddl, nil)
if err != nil {
return "", err
}
defer localFree(uintptr(unsafe.Pointer(sddl)))
return syscall.UTF16ToString((*[0xffff]uint16)(unsafe.Pointer(sddl))[:]), nil
}

3
vendor/github.com/Microsoft/go-winio/syscall.go generated vendored Normal file
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@@ -0,0 +1,3 @@
package winio
//go:generate go run golang.org/x/sys/windows/mkwinsyscall -output zsyscall_windows.go file.go pipe.go sd.go fileinfo.go privilege.go backup.go hvsock.go

427
vendor/github.com/Microsoft/go-winio/zsyscall_windows.go generated vendored Normal file
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@@ -0,0 +1,427 @@
// Code generated by 'go generate'; DO NOT EDIT.
package winio
import (
"syscall"
"unsafe"
"golang.org/x/sys/windows"
)
var _ unsafe.Pointer
// Do the interface allocations only once for common
// Errno values.
const (
errnoERROR_IO_PENDING = 997
)
var (
errERROR_IO_PENDING error = syscall.Errno(errnoERROR_IO_PENDING)
errERROR_EINVAL error = syscall.EINVAL
)
// errnoErr returns common boxed Errno values, to prevent
// allocations at runtime.
func errnoErr(e syscall.Errno) error {
switch e {
case 0:
return errERROR_EINVAL
case errnoERROR_IO_PENDING:
return errERROR_IO_PENDING
}
// TODO: add more here, after collecting data on the common
// error values see on Windows. (perhaps when running
// all.bat?)
return e
}
var (
modadvapi32 = windows.NewLazySystemDLL("advapi32.dll")
modkernel32 = windows.NewLazySystemDLL("kernel32.dll")
modntdll = windows.NewLazySystemDLL("ntdll.dll")
modws2_32 = windows.NewLazySystemDLL("ws2_32.dll")
procAdjustTokenPrivileges = modadvapi32.NewProc("AdjustTokenPrivileges")
procConvertSecurityDescriptorToStringSecurityDescriptorW = modadvapi32.NewProc("ConvertSecurityDescriptorToStringSecurityDescriptorW")
procConvertSidToStringSidW = modadvapi32.NewProc("ConvertSidToStringSidW")
procConvertStringSecurityDescriptorToSecurityDescriptorW = modadvapi32.NewProc("ConvertStringSecurityDescriptorToSecurityDescriptorW")
procGetSecurityDescriptorLength = modadvapi32.NewProc("GetSecurityDescriptorLength")
procImpersonateSelf = modadvapi32.NewProc("ImpersonateSelf")
procLookupAccountNameW = modadvapi32.NewProc("LookupAccountNameW")
procLookupPrivilegeDisplayNameW = modadvapi32.NewProc("LookupPrivilegeDisplayNameW")
procLookupPrivilegeNameW = modadvapi32.NewProc("LookupPrivilegeNameW")
procLookupPrivilegeValueW = modadvapi32.NewProc("LookupPrivilegeValueW")
procOpenThreadToken = modadvapi32.NewProc("OpenThreadToken")
procRevertToSelf = modadvapi32.NewProc("RevertToSelf")
procBackupRead = modkernel32.NewProc("BackupRead")
procBackupWrite = modkernel32.NewProc("BackupWrite")
procCancelIoEx = modkernel32.NewProc("CancelIoEx")
procConnectNamedPipe = modkernel32.NewProc("ConnectNamedPipe")
procCreateFileW = modkernel32.NewProc("CreateFileW")
procCreateIoCompletionPort = modkernel32.NewProc("CreateIoCompletionPort")
procCreateNamedPipeW = modkernel32.NewProc("CreateNamedPipeW")
procGetCurrentThread = modkernel32.NewProc("GetCurrentThread")
procGetNamedPipeHandleStateW = modkernel32.NewProc("GetNamedPipeHandleStateW")
procGetNamedPipeInfo = modkernel32.NewProc("GetNamedPipeInfo")
procGetQueuedCompletionStatus = modkernel32.NewProc("GetQueuedCompletionStatus")
procLocalAlloc = modkernel32.NewProc("LocalAlloc")
procLocalFree = modkernel32.NewProc("LocalFree")
procSetFileCompletionNotificationModes = modkernel32.NewProc("SetFileCompletionNotificationModes")
procNtCreateNamedPipeFile = modntdll.NewProc("NtCreateNamedPipeFile")
procRtlDefaultNpAcl = modntdll.NewProc("RtlDefaultNpAcl")
procRtlDosPathNameToNtPathName_U = modntdll.NewProc("RtlDosPathNameToNtPathName_U")
procRtlNtStatusToDosErrorNoTeb = modntdll.NewProc("RtlNtStatusToDosErrorNoTeb")
procWSAGetOverlappedResult = modws2_32.NewProc("WSAGetOverlappedResult")
procbind = modws2_32.NewProc("bind")
)
func adjustTokenPrivileges(token windows.Token, releaseAll bool, input *byte, outputSize uint32, output *byte, requiredSize *uint32) (success bool, err error) {
var _p0 uint32
if releaseAll {
_p0 = 1
}
r0, _, e1 := syscall.Syscall6(procAdjustTokenPrivileges.Addr(), 6, uintptr(token), uintptr(_p0), uintptr(unsafe.Pointer(input)), uintptr(outputSize), uintptr(unsafe.Pointer(output)), uintptr(unsafe.Pointer(requiredSize)))
success = r0 != 0
if true {
err = errnoErr(e1)
}
return
}
func convertSecurityDescriptorToStringSecurityDescriptor(sd *byte, revision uint32, secInfo uint32, sddl **uint16, sddlSize *uint32) (err error) {
r1, _, e1 := syscall.Syscall6(procConvertSecurityDescriptorToStringSecurityDescriptorW.Addr(), 5, uintptr(unsafe.Pointer(sd)), uintptr(revision), uintptr(secInfo), uintptr(unsafe.Pointer(sddl)), uintptr(unsafe.Pointer(sddlSize)), 0)
if r1 == 0 {
err = errnoErr(e1)
}
return
}
func convertSidToStringSid(sid *byte, str **uint16) (err error) {
r1, _, e1 := syscall.Syscall(procConvertSidToStringSidW.Addr(), 2, uintptr(unsafe.Pointer(sid)), uintptr(unsafe.Pointer(str)), 0)
if r1 == 0 {
err = errnoErr(e1)
}
return
}
func convertStringSecurityDescriptorToSecurityDescriptor(str string, revision uint32, sd *uintptr, size *uint32) (err error) {
var _p0 *uint16
_p0, err = syscall.UTF16PtrFromString(str)
if err != nil {
return
}
return _convertStringSecurityDescriptorToSecurityDescriptor(_p0, revision, sd, size)
}
func _convertStringSecurityDescriptorToSecurityDescriptor(str *uint16, revision uint32, sd *uintptr, size *uint32) (err error) {
r1, _, e1 := syscall.Syscall6(procConvertStringSecurityDescriptorToSecurityDescriptorW.Addr(), 4, uintptr(unsafe.Pointer(str)), uintptr(revision), uintptr(unsafe.Pointer(sd)), uintptr(unsafe.Pointer(size)), 0, 0)
if r1 == 0 {
err = errnoErr(e1)
}
return
}
func getSecurityDescriptorLength(sd uintptr) (len uint32) {
r0, _, _ := syscall.Syscall(procGetSecurityDescriptorLength.Addr(), 1, uintptr(sd), 0, 0)
len = uint32(r0)
return
}
func impersonateSelf(level uint32) (err error) {
r1, _, e1 := syscall.Syscall(procImpersonateSelf.Addr(), 1, uintptr(level), 0, 0)
if r1 == 0 {
err = errnoErr(e1)
}
return
}
func lookupAccountName(systemName *uint16, accountName string, sid *byte, sidSize *uint32, refDomain *uint16, refDomainSize *uint32, sidNameUse *uint32) (err error) {
var _p0 *uint16
_p0, err = syscall.UTF16PtrFromString(accountName)
if err != nil {
return
}
return _lookupAccountName(systemName, _p0, sid, sidSize, refDomain, refDomainSize, sidNameUse)
}
func _lookupAccountName(systemName *uint16, accountName *uint16, sid *byte, sidSize *uint32, refDomain *uint16, refDomainSize *uint32, sidNameUse *uint32) (err error) {
r1, _, e1 := syscall.Syscall9(procLookupAccountNameW.Addr(), 7, uintptr(unsafe.Pointer(systemName)), uintptr(unsafe.Pointer(accountName)), uintptr(unsafe.Pointer(sid)), uintptr(unsafe.Pointer(sidSize)), uintptr(unsafe.Pointer(refDomain)), uintptr(unsafe.Pointer(refDomainSize)), uintptr(unsafe.Pointer(sidNameUse)), 0, 0)
if r1 == 0 {
err = errnoErr(e1)
}
return
}
func lookupPrivilegeDisplayName(systemName string, name *uint16, buffer *uint16, size *uint32, languageId *uint32) (err error) {
var _p0 *uint16
_p0, err = syscall.UTF16PtrFromString(systemName)
if err != nil {
return
}
return _lookupPrivilegeDisplayName(_p0, name, buffer, size, languageId)
}
func _lookupPrivilegeDisplayName(systemName *uint16, name *uint16, buffer *uint16, size *uint32, languageId *uint32) (err error) {
r1, _, e1 := syscall.Syscall6(procLookupPrivilegeDisplayNameW.Addr(), 5, uintptr(unsafe.Pointer(systemName)), uintptr(unsafe.Pointer(name)), uintptr(unsafe.Pointer(buffer)), uintptr(unsafe.Pointer(size)), uintptr(unsafe.Pointer(languageId)), 0)
if r1 == 0 {
err = errnoErr(e1)
}
return
}
func lookupPrivilegeName(systemName string, luid *uint64, buffer *uint16, size *uint32) (err error) {
var _p0 *uint16
_p0, err = syscall.UTF16PtrFromString(systemName)
if err != nil {
return
}
return _lookupPrivilegeName(_p0, luid, buffer, size)
}
func _lookupPrivilegeName(systemName *uint16, luid *uint64, buffer *uint16, size *uint32) (err error) {
r1, _, e1 := syscall.Syscall6(procLookupPrivilegeNameW.Addr(), 4, uintptr(unsafe.Pointer(systemName)), uintptr(unsafe.Pointer(luid)), uintptr(unsafe.Pointer(buffer)), uintptr(unsafe.Pointer(size)), 0, 0)
if r1 == 0 {
err = errnoErr(e1)
}
return
}
func lookupPrivilegeValue(systemName string, name string, luid *uint64) (err error) {
var _p0 *uint16
_p0, err = syscall.UTF16PtrFromString(systemName)
if err != nil {
return
}
var _p1 *uint16
_p1, err = syscall.UTF16PtrFromString(name)
if err != nil {
return
}
return _lookupPrivilegeValue(_p0, _p1, luid)
}
func _lookupPrivilegeValue(systemName *uint16, name *uint16, luid *uint64) (err error) {
r1, _, e1 := syscall.Syscall(procLookupPrivilegeValueW.Addr(), 3, uintptr(unsafe.Pointer(systemName)), uintptr(unsafe.Pointer(name)), uintptr(unsafe.Pointer(luid)))
if r1 == 0 {
err = errnoErr(e1)
}
return
}
func openThreadToken(thread syscall.Handle, accessMask uint32, openAsSelf bool, token *windows.Token) (err error) {
var _p0 uint32
if openAsSelf {
_p0 = 1
}
r1, _, e1 := syscall.Syscall6(procOpenThreadToken.Addr(), 4, uintptr(thread), uintptr(accessMask), uintptr(_p0), uintptr(unsafe.Pointer(token)), 0, 0)
if r1 == 0 {
err = errnoErr(e1)
}
return
}
func revertToSelf() (err error) {
r1, _, e1 := syscall.Syscall(procRevertToSelf.Addr(), 0, 0, 0, 0)
if r1 == 0 {
err = errnoErr(e1)
}
return
}
func backupRead(h syscall.Handle, b []byte, bytesRead *uint32, abort bool, processSecurity bool, context *uintptr) (err error) {
var _p0 *byte
if len(b) > 0 {
_p0 = &b[0]
}
var _p1 uint32
if abort {
_p1 = 1
}
var _p2 uint32
if processSecurity {
_p2 = 1
}
r1, _, e1 := syscall.Syscall9(procBackupRead.Addr(), 7, uintptr(h), uintptr(unsafe.Pointer(_p0)), uintptr(len(b)), uintptr(unsafe.Pointer(bytesRead)), uintptr(_p1), uintptr(_p2), uintptr(unsafe.Pointer(context)), 0, 0)
if r1 == 0 {
err = errnoErr(e1)
}
return
}
func backupWrite(h syscall.Handle, b []byte, bytesWritten *uint32, abort bool, processSecurity bool, context *uintptr) (err error) {
var _p0 *byte
if len(b) > 0 {
_p0 = &b[0]
}
var _p1 uint32
if abort {
_p1 = 1
}
var _p2 uint32
if processSecurity {
_p2 = 1
}
r1, _, e1 := syscall.Syscall9(procBackupWrite.Addr(), 7, uintptr(h), uintptr(unsafe.Pointer(_p0)), uintptr(len(b)), uintptr(unsafe.Pointer(bytesWritten)), uintptr(_p1), uintptr(_p2), uintptr(unsafe.Pointer(context)), 0, 0)
if r1 == 0 {
err = errnoErr(e1)
}
return
}
func cancelIoEx(file syscall.Handle, o *syscall.Overlapped) (err error) {
r1, _, e1 := syscall.Syscall(procCancelIoEx.Addr(), 2, uintptr(file), uintptr(unsafe.Pointer(o)), 0)
if r1 == 0 {
err = errnoErr(e1)
}
return
}
func connectNamedPipe(pipe syscall.Handle, o *syscall.Overlapped) (err error) {
r1, _, e1 := syscall.Syscall(procConnectNamedPipe.Addr(), 2, uintptr(pipe), uintptr(unsafe.Pointer(o)), 0)
if r1 == 0 {
err = errnoErr(e1)
}
return
}
func createFile(name string, access uint32, mode uint32, sa *syscall.SecurityAttributes, createmode uint32, attrs uint32, templatefile syscall.Handle) (handle syscall.Handle, err error) {
var _p0 *uint16
_p0, err = syscall.UTF16PtrFromString(name)
if err != nil {
return
}
return _createFile(_p0, access, mode, sa, createmode, attrs, templatefile)
}
func _createFile(name *uint16, access uint32, mode uint32, sa *syscall.SecurityAttributes, createmode uint32, attrs uint32, templatefile syscall.Handle) (handle syscall.Handle, err error) {
r0, _, e1 := syscall.Syscall9(procCreateFileW.Addr(), 7, uintptr(unsafe.Pointer(name)), uintptr(access), uintptr(mode), uintptr(unsafe.Pointer(sa)), uintptr(createmode), uintptr(attrs), uintptr(templatefile), 0, 0)
handle = syscall.Handle(r0)
if handle == syscall.InvalidHandle {
err = errnoErr(e1)
}
return
}
func createIoCompletionPort(file syscall.Handle, port syscall.Handle, key uintptr, threadCount uint32) (newport syscall.Handle, err error) {
r0, _, e1 := syscall.Syscall6(procCreateIoCompletionPort.Addr(), 4, uintptr(file), uintptr(port), uintptr(key), uintptr(threadCount), 0, 0)
newport = syscall.Handle(r0)
if newport == 0 {
err = errnoErr(e1)
}
return
}
func createNamedPipe(name string, flags uint32, pipeMode uint32, maxInstances uint32, outSize uint32, inSize uint32, defaultTimeout uint32, sa *syscall.SecurityAttributes) (handle syscall.Handle, err error) {
var _p0 *uint16
_p0, err = syscall.UTF16PtrFromString(name)
if err != nil {
return
}
return _createNamedPipe(_p0, flags, pipeMode, maxInstances, outSize, inSize, defaultTimeout, sa)
}
func _createNamedPipe(name *uint16, flags uint32, pipeMode uint32, maxInstances uint32, outSize uint32, inSize uint32, defaultTimeout uint32, sa *syscall.SecurityAttributes) (handle syscall.Handle, err error) {
r0, _, e1 := syscall.Syscall9(procCreateNamedPipeW.Addr(), 8, uintptr(unsafe.Pointer(name)), uintptr(flags), uintptr(pipeMode), uintptr(maxInstances), uintptr(outSize), uintptr(inSize), uintptr(defaultTimeout), uintptr(unsafe.Pointer(sa)), 0)
handle = syscall.Handle(r0)
if handle == syscall.InvalidHandle {
err = errnoErr(e1)
}
return
}
func getCurrentThread() (h syscall.Handle) {
r0, _, _ := syscall.Syscall(procGetCurrentThread.Addr(), 0, 0, 0, 0)
h = syscall.Handle(r0)
return
}
func getNamedPipeHandleState(pipe syscall.Handle, state *uint32, curInstances *uint32, maxCollectionCount *uint32, collectDataTimeout *uint32, userName *uint16, maxUserNameSize uint32) (err error) {
r1, _, e1 := syscall.Syscall9(procGetNamedPipeHandleStateW.Addr(), 7, uintptr(pipe), uintptr(unsafe.Pointer(state)), uintptr(unsafe.Pointer(curInstances)), uintptr(unsafe.Pointer(maxCollectionCount)), uintptr(unsafe.Pointer(collectDataTimeout)), uintptr(unsafe.Pointer(userName)), uintptr(maxUserNameSize), 0, 0)
if r1 == 0 {
err = errnoErr(e1)
}
return
}
func getNamedPipeInfo(pipe syscall.Handle, flags *uint32, outSize *uint32, inSize *uint32, maxInstances *uint32) (err error) {
r1, _, e1 := syscall.Syscall6(procGetNamedPipeInfo.Addr(), 5, uintptr(pipe), uintptr(unsafe.Pointer(flags)), uintptr(unsafe.Pointer(outSize)), uintptr(unsafe.Pointer(inSize)), uintptr(unsafe.Pointer(maxInstances)), 0)
if r1 == 0 {
err = errnoErr(e1)
}
return
}
func getQueuedCompletionStatus(port syscall.Handle, bytes *uint32, key *uintptr, o **ioOperation, timeout uint32) (err error) {
r1, _, e1 := syscall.Syscall6(procGetQueuedCompletionStatus.Addr(), 5, uintptr(port), uintptr(unsafe.Pointer(bytes)), uintptr(unsafe.Pointer(key)), uintptr(unsafe.Pointer(o)), uintptr(timeout), 0)
if r1 == 0 {
err = errnoErr(e1)
}
return
}
func localAlloc(uFlags uint32, length uint32) (ptr uintptr) {
r0, _, _ := syscall.Syscall(procLocalAlloc.Addr(), 2, uintptr(uFlags), uintptr(length), 0)
ptr = uintptr(r0)
return
}
func localFree(mem uintptr) {
syscall.Syscall(procLocalFree.Addr(), 1, uintptr(mem), 0, 0)
return
}
func setFileCompletionNotificationModes(h syscall.Handle, flags uint8) (err error) {
r1, _, e1 := syscall.Syscall(procSetFileCompletionNotificationModes.Addr(), 2, uintptr(h), uintptr(flags), 0)
if r1 == 0 {
err = errnoErr(e1)
}
return
}
func ntCreateNamedPipeFile(pipe *syscall.Handle, access uint32, oa *objectAttributes, iosb *ioStatusBlock, share uint32, disposition uint32, options uint32, typ uint32, readMode uint32, completionMode uint32, maxInstances uint32, inboundQuota uint32, outputQuota uint32, timeout *int64) (status ntstatus) {
r0, _, _ := syscall.Syscall15(procNtCreateNamedPipeFile.Addr(), 14, uintptr(unsafe.Pointer(pipe)), uintptr(access), uintptr(unsafe.Pointer(oa)), uintptr(unsafe.Pointer(iosb)), uintptr(share), uintptr(disposition), uintptr(options), uintptr(typ), uintptr(readMode), uintptr(completionMode), uintptr(maxInstances), uintptr(inboundQuota), uintptr(outputQuota), uintptr(unsafe.Pointer(timeout)), 0)
status = ntstatus(r0)
return
}
func rtlDefaultNpAcl(dacl *uintptr) (status ntstatus) {
r0, _, _ := syscall.Syscall(procRtlDefaultNpAcl.Addr(), 1, uintptr(unsafe.Pointer(dacl)), 0, 0)
status = ntstatus(r0)
return
}
func rtlDosPathNameToNtPathName(name *uint16, ntName *unicodeString, filePart uintptr, reserved uintptr) (status ntstatus) {
r0, _, _ := syscall.Syscall6(procRtlDosPathNameToNtPathName_U.Addr(), 4, uintptr(unsafe.Pointer(name)), uintptr(unsafe.Pointer(ntName)), uintptr(filePart), uintptr(reserved), 0, 0)
status = ntstatus(r0)
return
}
func rtlNtStatusToDosError(status ntstatus) (winerr error) {
r0, _, _ := syscall.Syscall(procRtlNtStatusToDosErrorNoTeb.Addr(), 1, uintptr(status), 0, 0)
if r0 != 0 {
winerr = syscall.Errno(r0)
}
return
}
func wsaGetOverlappedResult(h syscall.Handle, o *syscall.Overlapped, bytes *uint32, wait bool, flags *uint32) (err error) {
var _p0 uint32
if wait {
_p0 = 1
}
r1, _, e1 := syscall.Syscall6(procWSAGetOverlappedResult.Addr(), 5, uintptr(h), uintptr(unsafe.Pointer(o)), uintptr(unsafe.Pointer(bytes)), uintptr(_p0), uintptr(unsafe.Pointer(flags)), 0)
if r1 == 0 {
err = errnoErr(e1)
}
return
}
func bind(s syscall.Handle, name unsafe.Pointer, namelen int32) (err error) {
r1, _, e1 := syscall.Syscall(procbind.Addr(), 3, uintptr(s), uintptr(name), uintptr(namelen))
if r1 == socketError {
err = errnoErr(e1)
}
return
}

3
vendor/github.com/ProtonMail/go-crypto/AUTHORS generated vendored Normal file
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@@ -0,0 +1,3 @@
# This source code refers to The Go Authors for copyright purposes.
# The master list of authors is in the main Go distribution,
# visible at https://tip.golang.org/AUTHORS.

3
vendor/github.com/ProtonMail/go-crypto/CONTRIBUTORS generated vendored Normal file
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@@ -0,0 +1,3 @@
# This source code was written by the Go contributors.
# The master list of contributors is in the main Go distribution,
# visible at https://tip.golang.org/CONTRIBUTORS.

27
vendor/github.com/ProtonMail/go-crypto/LICENSE generated vendored Normal file
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@@ -0,0 +1,27 @@
Copyright (c) 2009 The Go Authors. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following disclaimer
in the documentation and/or other materials provided with the
distribution.
* Neither the name of Google Inc. nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

22
vendor/github.com/ProtonMail/go-crypto/PATENTS generated vendored Normal file
View File

@@ -0,0 +1,22 @@
Additional IP Rights Grant (Patents)
"This implementation" means the copyrightable works distributed by
Google as part of the Go project.
Google hereby grants to You a perpetual, worldwide, non-exclusive,
no-charge, royalty-free, irrevocable (except as stated in this section)
patent license to make, have made, use, offer to sell, sell, import,
transfer and otherwise run, modify and propagate the contents of this
implementation of Go, where such license applies only to those patent
claims, both currently owned or controlled by Google and acquired in
the future, licensable by Google that are necessarily infringed by this
implementation of Go. This grant does not include claims that would be
infringed only as a consequence of further modification of this
implementation. If you or your agent or exclusive licensee institute or
order or agree to the institution of patent litigation against any
entity (including a cross-claim or counterclaim in a lawsuit) alleging
that this implementation of Go or any code incorporated within this
implementation of Go constitutes direct or contributory patent
infringement, or inducement of patent infringement, then any patent
rights granted to you under this License for this implementation of Go
shall terminate as of the date such litigation is filed.

381
vendor/github.com/ProtonMail/go-crypto/bitcurves/bitcurve.go generated vendored Normal file
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@@ -0,0 +1,381 @@
package bitcurves
// Copyright 2010 The Go Authors. All rights reserved.
// Copyright 2011 ThePiachu. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package bitelliptic implements several Koblitz elliptic curves over prime
// fields.
// This package operates, internally, on Jacobian coordinates. For a given
// (x, y) position on the curve, the Jacobian coordinates are (x1, y1, z1)
// where x = x1/z1² and y = y1/z1³. The greatest speedups come when the whole
// calculation can be performed within the transform (as in ScalarMult and
// ScalarBaseMult). But even for Add and Double, it's faster to apply and
// reverse the transform than to operate in affine coordinates.
import (
"crypto/elliptic"
"io"
"math/big"
"sync"
)
// A BitCurve represents a Koblitz Curve with a=0.
// See http://www.hyperelliptic.org/EFD/g1p/auto-shortw.html
type BitCurve struct {
Name string
P *big.Int // the order of the underlying field
N *big.Int // the order of the base point
B *big.Int // the constant of the BitCurve equation
Gx, Gy *big.Int // (x,y) of the base point
BitSize int // the size of the underlying field
}
// Params returns the parameters of the given BitCurve (see BitCurve struct)
func (bitCurve *BitCurve) Params() (cp *elliptic.CurveParams) {
cp = new(elliptic.CurveParams)
cp.Name = bitCurve.Name
cp.P = bitCurve.P
cp.N = bitCurve.N
cp.Gx = bitCurve.Gx
cp.Gy = bitCurve.Gy
cp.BitSize = bitCurve.BitSize
return cp
}
// IsOnCurve returns true if the given (x,y) lies on the BitCurve.
func (bitCurve *BitCurve) IsOnCurve(x, y *big.Int) bool {
// y² = x³ + b
y2 := new(big.Int).Mul(y, y) //y²
y2.Mod(y2, bitCurve.P) //y²%P
x3 := new(big.Int).Mul(x, x) //x²
x3.Mul(x3, x) //x³
x3.Add(x3, bitCurve.B) //x³+B
x3.Mod(x3, bitCurve.P) //(x³+B)%P
return x3.Cmp(y2) == 0
}
// affineFromJacobian reverses the Jacobian transform. See the comment at the
// top of the file.
func (bitCurve *BitCurve) affineFromJacobian(x, y, z *big.Int) (xOut, yOut *big.Int) {
if z.Cmp(big.NewInt(0)) == 0 {
panic("bitcurve: Can't convert to affine with Jacobian Z = 0")
}
// x = YZ^2 mod P
zinv := new(big.Int).ModInverse(z, bitCurve.P)
zinvsq := new(big.Int).Mul(zinv, zinv)
xOut = new(big.Int).Mul(x, zinvsq)
xOut.Mod(xOut, bitCurve.P)
// y = YZ^3 mod P
zinvsq.Mul(zinvsq, zinv)
yOut = new(big.Int).Mul(y, zinvsq)
yOut.Mod(yOut, bitCurve.P)
return xOut, yOut
}
// Add returns the sum of (x1,y1) and (x2,y2)
func (bitCurve *BitCurve) Add(x1, y1, x2, y2 *big.Int) (*big.Int, *big.Int) {
z := new(big.Int).SetInt64(1)
x, y, z := bitCurve.addJacobian(x1, y1, z, x2, y2, z)
return bitCurve.affineFromJacobian(x, y, z)
}
// addJacobian takes two points in Jacobian coordinates, (x1, y1, z1) and
// (x2, y2, z2) and returns their sum, also in Jacobian form.
func (bitCurve *BitCurve) addJacobian(x1, y1, z1, x2, y2, z2 *big.Int) (*big.Int, *big.Int, *big.Int) {
// See http://hyperelliptic.org/EFD/g1p/auto-shortw-jacobian-0.html#addition-add-2007-bl
z1z1 := new(big.Int).Mul(z1, z1)
z1z1.Mod(z1z1, bitCurve.P)
z2z2 := new(big.Int).Mul(z2, z2)
z2z2.Mod(z2z2, bitCurve.P)
u1 := new(big.Int).Mul(x1, z2z2)
u1.Mod(u1, bitCurve.P)
u2 := new(big.Int).Mul(x2, z1z1)
u2.Mod(u2, bitCurve.P)
h := new(big.Int).Sub(u2, u1)
if h.Sign() == -1 {
h.Add(h, bitCurve.P)
}
i := new(big.Int).Lsh(h, 1)
i.Mul(i, i)
j := new(big.Int).Mul(h, i)
s1 := new(big.Int).Mul(y1, z2)
s1.Mul(s1, z2z2)
s1.Mod(s1, bitCurve.P)
s2 := new(big.Int).Mul(y2, z1)
s2.Mul(s2, z1z1)
s2.Mod(s2, bitCurve.P)
r := new(big.Int).Sub(s2, s1)
if r.Sign() == -1 {
r.Add(r, bitCurve.P)
}
r.Lsh(r, 1)
v := new(big.Int).Mul(u1, i)
x3 := new(big.Int).Set(r)
x3.Mul(x3, x3)
x3.Sub(x3, j)
x3.Sub(x3, v)
x3.Sub(x3, v)
x3.Mod(x3, bitCurve.P)
y3 := new(big.Int).Set(r)
v.Sub(v, x3)
y3.Mul(y3, v)
s1.Mul(s1, j)
s1.Lsh(s1, 1)
y3.Sub(y3, s1)
y3.Mod(y3, bitCurve.P)
z3 := new(big.Int).Add(z1, z2)
z3.Mul(z3, z3)
z3.Sub(z3, z1z1)
if z3.Sign() == -1 {
z3.Add(z3, bitCurve.P)
}
z3.Sub(z3, z2z2)
if z3.Sign() == -1 {
z3.Add(z3, bitCurve.P)
}
z3.Mul(z3, h)
z3.Mod(z3, bitCurve.P)
return x3, y3, z3
}
// Double returns 2*(x,y)
func (bitCurve *BitCurve) Double(x1, y1 *big.Int) (*big.Int, *big.Int) {
z1 := new(big.Int).SetInt64(1)
return bitCurve.affineFromJacobian(bitCurve.doubleJacobian(x1, y1, z1))
}
// doubleJacobian takes a point in Jacobian coordinates, (x, y, z), and
// returns its double, also in Jacobian form.
func (bitCurve *BitCurve) doubleJacobian(x, y, z *big.Int) (*big.Int, *big.Int, *big.Int) {
// See http://hyperelliptic.org/EFD/g1p/auto-shortw-jacobian-0.html#doubling-dbl-2009-l
a := new(big.Int).Mul(x, x) //X1²
b := new(big.Int).Mul(y, y) //Y1²
c := new(big.Int).Mul(b, b) //B²
d := new(big.Int).Add(x, b) //X1+B
d.Mul(d, d) //(X1+B)²
d.Sub(d, a) //(X1+B)²-A
d.Sub(d, c) //(X1+B)²-A-C
d.Mul(d, big.NewInt(2)) //2*((X1+B)²-A-C)
e := new(big.Int).Mul(big.NewInt(3), a) //3*A
f := new(big.Int).Mul(e, e) //E²
x3 := new(big.Int).Mul(big.NewInt(2), d) //2*D
x3.Sub(f, x3) //F-2*D
x3.Mod(x3, bitCurve.P)
y3 := new(big.Int).Sub(d, x3) //D-X3
y3.Mul(e, y3) //E*(D-X3)
y3.Sub(y3, new(big.Int).Mul(big.NewInt(8), c)) //E*(D-X3)-8*C
y3.Mod(y3, bitCurve.P)
z3 := new(big.Int).Mul(y, z) //Y1*Z1
z3.Mul(big.NewInt(2), z3) //3*Y1*Z1
z3.Mod(z3, bitCurve.P)
return x3, y3, z3
}
//TODO: double check if it is okay
// ScalarMult returns k*(Bx,By) where k is a number in big-endian form.
func (bitCurve *BitCurve) ScalarMult(Bx, By *big.Int, k []byte) (*big.Int, *big.Int) {
// We have a slight problem in that the identity of the group (the
// point at infinity) cannot be represented in (x, y) form on a finite
// machine. Thus the standard add/double algorithm has to be tweaked
// slightly: our initial state is not the identity, but x, and we
// ignore the first true bit in |k|. If we don't find any true bits in
// |k|, then we return nil, nil, because we cannot return the identity
// element.
Bz := new(big.Int).SetInt64(1)
x := Bx
y := By
z := Bz
seenFirstTrue := false
for _, byte := range k {
for bitNum := 0; bitNum < 8; bitNum++ {
if seenFirstTrue {
x, y, z = bitCurve.doubleJacobian(x, y, z)
}
if byte&0x80 == 0x80 {
if !seenFirstTrue {
seenFirstTrue = true
} else {
x, y, z = bitCurve.addJacobian(Bx, By, Bz, x, y, z)
}
}
byte <<= 1
}
}
if !seenFirstTrue {
return nil, nil
}
return bitCurve.affineFromJacobian(x, y, z)
}
// ScalarBaseMult returns k*G, where G is the base point of the group and k is
// an integer in big-endian form.
func (bitCurve *BitCurve) ScalarBaseMult(k []byte) (*big.Int, *big.Int) {
return bitCurve.ScalarMult(bitCurve.Gx, bitCurve.Gy, k)
}
var mask = []byte{0xff, 0x1, 0x3, 0x7, 0xf, 0x1f, 0x3f, 0x7f}
//TODO: double check if it is okay
// GenerateKey returns a public/private key pair. The private key is generated
// using the given reader, which must return random data.
func (bitCurve *BitCurve) GenerateKey(rand io.Reader) (priv []byte, x, y *big.Int, err error) {
byteLen := (bitCurve.BitSize + 7) >> 3
priv = make([]byte, byteLen)
for x == nil {
_, err = io.ReadFull(rand, priv)
if err != nil {
return
}
// We have to mask off any excess bits in the case that the size of the
// underlying field is not a whole number of bytes.
priv[0] &= mask[bitCurve.BitSize%8]
// This is because, in tests, rand will return all zeros and we don't
// want to get the point at infinity and loop forever.
priv[1] ^= 0x42
x, y = bitCurve.ScalarBaseMult(priv)
}
return
}
// Marshal converts a point into the form specified in section 4.3.6 of ANSI
// X9.62.
func (bitCurve *BitCurve) Marshal(x, y *big.Int) []byte {
byteLen := (bitCurve.BitSize + 7) >> 3
ret := make([]byte, 1+2*byteLen)
ret[0] = 4 // uncompressed point
xBytes := x.Bytes()
copy(ret[1+byteLen-len(xBytes):], xBytes)
yBytes := y.Bytes()
copy(ret[1+2*byteLen-len(yBytes):], yBytes)
return ret
}
// Unmarshal converts a point, serialised by Marshal, into an x, y pair. On
// error, x = nil.
func (bitCurve *BitCurve) Unmarshal(data []byte) (x, y *big.Int) {
byteLen := (bitCurve.BitSize + 7) >> 3
if len(data) != 1+2*byteLen {
return
}
if data[0] != 4 { // uncompressed form
return
}
x = new(big.Int).SetBytes(data[1 : 1+byteLen])
y = new(big.Int).SetBytes(data[1+byteLen:])
return
}
//curve parameters taken from:
//http://www.secg.org/collateral/sec2_final.pdf
var initonce sync.Once
var secp160k1 *BitCurve
var secp192k1 *BitCurve
var secp224k1 *BitCurve
var secp256k1 *BitCurve
func initAll() {
initS160()
initS192()
initS224()
initS256()
}
func initS160() {
// See SEC 2 section 2.4.1
secp160k1 = new(BitCurve)
secp160k1.Name = "secp160k1"
secp160k1.P, _ = new(big.Int).SetString("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFAC73", 16)
secp160k1.N, _ = new(big.Int).SetString("0100000000000000000001B8FA16DFAB9ACA16B6B3", 16)
secp160k1.B, _ = new(big.Int).SetString("0000000000000000000000000000000000000007", 16)
secp160k1.Gx, _ = new(big.Int).SetString("3B4C382CE37AA192A4019E763036F4F5DD4D7EBB", 16)
secp160k1.Gy, _ = new(big.Int).SetString("938CF935318FDCED6BC28286531733C3F03C4FEE", 16)
secp160k1.BitSize = 160
}
func initS192() {
// See SEC 2 section 2.5.1
secp192k1 = new(BitCurve)
secp192k1.Name = "secp192k1"
secp192k1.P, _ = new(big.Int).SetString("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFEE37", 16)
secp192k1.N, _ = new(big.Int).SetString("FFFFFFFFFFFFFFFFFFFFFFFE26F2FC170F69466A74DEFD8D", 16)
secp192k1.B, _ = new(big.Int).SetString("000000000000000000000000000000000000000000000003", 16)
secp192k1.Gx, _ = new(big.Int).SetString("DB4FF10EC057E9AE26B07D0280B7F4341DA5D1B1EAE06C7D", 16)
secp192k1.Gy, _ = new(big.Int).SetString("9B2F2F6D9C5628A7844163D015BE86344082AA88D95E2F9D", 16)
secp192k1.BitSize = 192
}
func initS224() {
// See SEC 2 section 2.6.1
secp224k1 = new(BitCurve)
secp224k1.Name = "secp224k1"
secp224k1.P, _ = new(big.Int).SetString("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFE56D", 16)
secp224k1.N, _ = new(big.Int).SetString("010000000000000000000000000001DCE8D2EC6184CAF0A971769FB1F7", 16)
secp224k1.B, _ = new(big.Int).SetString("00000000000000000000000000000000000000000000000000000005", 16)
secp224k1.Gx, _ = new(big.Int).SetString("A1455B334DF099DF30FC28A169A467E9E47075A90F7E650EB6B7A45C", 16)
secp224k1.Gy, _ = new(big.Int).SetString("7E089FED7FBA344282CAFBD6F7E319F7C0B0BD59E2CA4BDB556D61A5", 16)
secp224k1.BitSize = 224
}
func initS256() {
// See SEC 2 section 2.7.1
secp256k1 = new(BitCurve)
secp256k1.Name = "secp256k1"
secp256k1.P, _ = new(big.Int).SetString("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2F", 16)
secp256k1.N, _ = new(big.Int).SetString("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141", 16)
secp256k1.B, _ = new(big.Int).SetString("0000000000000000000000000000000000000000000000000000000000000007", 16)
secp256k1.Gx, _ = new(big.Int).SetString("79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798", 16)
secp256k1.Gy, _ = new(big.Int).SetString("483ADA7726A3C4655DA4FBFC0E1108A8FD17B448A68554199C47D08FFB10D4B8", 16)
secp256k1.BitSize = 256
}
// S160 returns a BitCurve which implements secp160k1 (see SEC 2 section 2.4.1)
func S160() *BitCurve {
initonce.Do(initAll)
return secp160k1
}
// S192 returns a BitCurve which implements secp192k1 (see SEC 2 section 2.5.1)
func S192() *BitCurve {
initonce.Do(initAll)
return secp192k1
}
// S224 returns a BitCurve which implements secp224k1 (see SEC 2 section 2.6.1)
func S224() *BitCurve {
initonce.Do(initAll)
return secp224k1
}
// S256 returns a BitCurve which implements bitcurves (see SEC 2 section 2.7.1)
func S256() *BitCurve {
initonce.Do(initAll)
return secp256k1
}

134
vendor/github.com/ProtonMail/go-crypto/brainpool/brainpool.go generated vendored Normal file
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// Package brainpool implements Brainpool elliptic curves.
// Implementation of rcurves is from github.com/ebfe/brainpool
// Note that these curves are implemented with naive, non-constant time operations
// and are likely not suitable for environments where timing attacks are a concern.
package brainpool
import (
"crypto/elliptic"
"math/big"
"sync"
)
var (
once sync.Once
p256t1, p384t1, p512t1 *elliptic.CurveParams
p256r1, p384r1, p512r1 *rcurve
)
func initAll() {
initP256t1()
initP384t1()
initP512t1()
initP256r1()
initP384r1()
initP512r1()
}
func initP256t1() {
p256t1 = &elliptic.CurveParams{Name: "brainpoolP256t1"}
p256t1.P, _ = new(big.Int).SetString("A9FB57DBA1EEA9BC3E660A909D838D726E3BF623D52620282013481D1F6E5377", 16)
p256t1.N, _ = new(big.Int).SetString("A9FB57DBA1EEA9BC3E660A909D838D718C397AA3B561A6F7901E0E82974856A7", 16)
p256t1.B, _ = new(big.Int).SetString("662C61C430D84EA4FE66A7733D0B76B7BF93EBC4AF2F49256AE58101FEE92B04", 16)
p256t1.Gx, _ = new(big.Int).SetString("A3E8EB3CC1CFE7B7732213B23A656149AFA142C47AAFBC2B79A191562E1305F4", 16)
p256t1.Gy, _ = new(big.Int).SetString("2D996C823439C56D7F7B22E14644417E69BCB6DE39D027001DABE8F35B25C9BE", 16)
p256t1.BitSize = 256
}
func initP256r1() {
twisted := p256t1
params := &elliptic.CurveParams{
Name: "brainpoolP256r1",
P: twisted.P,
N: twisted.N,
BitSize: twisted.BitSize,
}
params.Gx, _ = new(big.Int).SetString("8BD2AEB9CB7E57CB2C4B482FFC81B7AFB9DE27E1E3BD23C23A4453BD9ACE3262", 16)
params.Gy, _ = new(big.Int).SetString("547EF835C3DAC4FD97F8461A14611DC9C27745132DED8E545C1D54C72F046997", 16)
z, _ := new(big.Int).SetString("3E2D4BD9597B58639AE7AA669CAB9837CF5CF20A2C852D10F655668DFC150EF0", 16)
p256r1 = newrcurve(twisted, params, z)
}
func initP384t1() {
p384t1 = &elliptic.CurveParams{Name: "brainpoolP384t1"}
p384t1.P, _ = new(big.Int).SetString("8CB91E82A3386D280F5D6F7E50E641DF152F7109ED5456B412B1DA197FB71123ACD3A729901D1A71874700133107EC53", 16)
p384t1.N, _ = new(big.Int).SetString("8CB91E82A3386D280F5D6F7E50E641DF152F7109ED5456B31F166E6CAC0425A7CF3AB6AF6B7FC3103B883202E9046565", 16)
p384t1.B, _ = new(big.Int).SetString("7F519EADA7BDA81BD826DBA647910F8C4B9346ED8CCDC64E4B1ABD11756DCE1D2074AA263B88805CED70355A33B471EE", 16)
p384t1.Gx, _ = new(big.Int).SetString("18DE98B02DB9A306F2AFCD7235F72A819B80AB12EBD653172476FECD462AABFFC4FF191B946A5F54D8D0AA2F418808CC", 16)
p384t1.Gy, _ = new(big.Int).SetString("25AB056962D30651A114AFD2755AD336747F93475B7A1FCA3B88F2B6A208CCFE469408584DC2B2912675BF5B9E582928", 16)
p384t1.BitSize = 384
}
func initP384r1() {
twisted := p384t1
params := &elliptic.CurveParams{
Name: "brainpoolP384r1",
P: twisted.P,
N: twisted.N,
BitSize: twisted.BitSize,
}
params.Gx, _ = new(big.Int).SetString("1D1C64F068CF45FFA2A63A81B7C13F6B8847A3E77EF14FE3DB7FCAFE0CBD10E8E826E03436D646AAEF87B2E247D4AF1E", 16)
params.Gy, _ = new(big.Int).SetString("8ABE1D7520F9C2A45CB1EB8E95CFD55262B70B29FEEC5864E19C054FF99129280E4646217791811142820341263C5315", 16)
z, _ := new(big.Int).SetString("41DFE8DD399331F7166A66076734A89CD0D2BCDB7D068E44E1F378F41ECBAE97D2D63DBC87BCCDDCCC5DA39E8589291C", 16)
p384r1 = newrcurve(twisted, params, z)
}
func initP512t1() {
p512t1 = &elliptic.CurveParams{Name: "brainpoolP512t1"}
p512t1.P, _ = new(big.Int).SetString("AADD9DB8DBE9C48B3FD4E6AE33C9FC07CB308DB3B3C9D20ED6639CCA703308717D4D9B009BC66842AECDA12AE6A380E62881FF2F2D82C68528AA6056583A48F3", 16)
p512t1.N, _ = new(big.Int).SetString("AADD9DB8DBE9C48B3FD4E6AE33C9FC07CB308DB3B3C9D20ED6639CCA70330870553E5C414CA92619418661197FAC10471DB1D381085DDADDB58796829CA90069", 16)
p512t1.B, _ = new(big.Int).SetString("7CBBBCF9441CFAB76E1890E46884EAE321F70C0BCB4981527897504BEC3E36A62BCDFA2304976540F6450085F2DAE145C22553B465763689180EA2571867423E", 16)
p512t1.Gx, _ = new(big.Int).SetString("640ECE5C12788717B9C1BA06CBC2A6FEBA85842458C56DDE9DB1758D39C0313D82BA51735CDB3EA499AA77A7D6943A64F7A3F25FE26F06B51BAA2696FA9035DA", 16)
p512t1.Gy, _ = new(big.Int).SetString("5B534BD595F5AF0FA2C892376C84ACE1BB4E3019B71634C01131159CAE03CEE9D9932184BEEF216BD71DF2DADF86A627306ECFF96DBB8BACE198B61E00F8B332", 16)
p512t1.BitSize = 512
}
func initP512r1() {
twisted := p512t1
params := &elliptic.CurveParams{
Name: "brainpoolP512r1",
P: twisted.P,
N: twisted.N,
BitSize: twisted.BitSize,
}
params.Gx, _ = new(big.Int).SetString("81AEE4BDD82ED9645A21322E9C4C6A9385ED9F70B5D916C1B43B62EEF4D0098EFF3B1F78E2D0D48D50D1687B93B97D5F7C6D5047406A5E688B352209BCB9F822", 16)
params.Gy, _ = new(big.Int).SetString("7DDE385D566332ECC0EABFA9CF7822FDF209F70024A57B1AA000C55B881F8111B2DCDE494A5F485E5BCA4BD88A2763AED1CA2B2FA8F0540678CD1E0F3AD80892", 16)
z, _ := new(big.Int).SetString("12EE58E6764838B69782136F0F2D3BA06E27695716054092E60A80BEDB212B64E585D90BCE13761F85C3F1D2A64E3BE8FEA2220F01EBA5EEB0F35DBD29D922AB", 16)
p512r1 = newrcurve(twisted, params, z)
}
// P256t1 returns a Curve which implements Brainpool P256t1 (see RFC 5639, section 3.4)
func P256t1() elliptic.Curve {
once.Do(initAll)
return p256t1
}
// P256r1 returns a Curve which implements Brainpool P256r1 (see RFC 5639, section 3.4)
func P256r1() elliptic.Curve {
once.Do(initAll)
return p256r1
}
// P384t1 returns a Curve which implements Brainpool P384t1 (see RFC 5639, section 3.6)
func P384t1() elliptic.Curve {
once.Do(initAll)
return p384t1
}
// P384r1 returns a Curve which implements Brainpool P384r1 (see RFC 5639, section 3.6)
func P384r1() elliptic.Curve {
once.Do(initAll)
return p384r1
}
// P512t1 returns a Curve which implements Brainpool P512t1 (see RFC 5639, section 3.7)
func P512t1() elliptic.Curve {
once.Do(initAll)
return p512t1
}
// P512r1 returns a Curve which implements Brainpool P512r1 (see RFC 5639, section 3.7)
func P512r1() elliptic.Curve {
once.Do(initAll)
return p512r1
}

83
vendor/github.com/ProtonMail/go-crypto/brainpool/rcurve.go generated vendored Normal file
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package brainpool
import (
"crypto/elliptic"
"math/big"
)
var _ elliptic.Curve = (*rcurve)(nil)
type rcurve struct {
twisted elliptic.Curve
params *elliptic.CurveParams
z *big.Int
zinv *big.Int
z2 *big.Int
z3 *big.Int
zinv2 *big.Int
zinv3 *big.Int
}
var (
two = big.NewInt(2)
three = big.NewInt(3)
)
func newrcurve(twisted elliptic.Curve, params *elliptic.CurveParams, z *big.Int) *rcurve {
zinv := new(big.Int).ModInverse(z, params.P)
return &rcurve{
twisted: twisted,
params: params,
z: z,
zinv: zinv,
z2: new(big.Int).Exp(z, two, params.P),
z3: new(big.Int).Exp(z, three, params.P),
zinv2: new(big.Int).Exp(zinv, two, params.P),
zinv3: new(big.Int).Exp(zinv, three, params.P),
}
}
func (curve *rcurve) toTwisted(x, y *big.Int) (*big.Int, *big.Int) {
var tx, ty big.Int
tx.Mul(x, curve.z2)
tx.Mod(&tx, curve.params.P)
ty.Mul(y, curve.z3)
ty.Mod(&ty, curve.params.P)
return &tx, &ty
}
func (curve *rcurve) fromTwisted(tx, ty *big.Int) (*big.Int, *big.Int) {
var x, y big.Int
x.Mul(tx, curve.zinv2)
x.Mod(&x, curve.params.P)
y.Mul(ty, curve.zinv3)
y.Mod(&y, curve.params.P)
return &x, &y
}
func (curve *rcurve) Params() *elliptic.CurveParams {
return curve.params
}
func (curve *rcurve) IsOnCurve(x, y *big.Int) bool {
return curve.twisted.IsOnCurve(curve.toTwisted(x, y))
}
func (curve *rcurve) Add(x1, y1, x2, y2 *big.Int) (x, y *big.Int) {
tx1, ty1 := curve.toTwisted(x1, y1)
tx2, ty2 := curve.toTwisted(x2, y2)
return curve.fromTwisted(curve.twisted.Add(tx1, ty1, tx2, ty2))
}
func (curve *rcurve) Double(x1, y1 *big.Int) (x, y *big.Int) {
return curve.fromTwisted(curve.twisted.Double(curve.toTwisted(x1, y1)))
}
func (curve *rcurve) ScalarMult(x1, y1 *big.Int, scalar []byte) (x, y *big.Int) {
tx1, ty1 := curve.toTwisted(x1, y1)
return curve.fromTwisted(curve.twisted.ScalarMult(tx1, ty1, scalar))
}
func (curve *rcurve) ScalarBaseMult(scalar []byte) (x, y *big.Int) {
return curve.fromTwisted(curve.twisted.ScalarBaseMult(scalar))
}

162
vendor/github.com/ProtonMail/go-crypto/eax/eax.go generated vendored Normal file
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// Copyright (C) 2019 ProtonTech AG
// Package eax provides an implementation of the EAX
// (encrypt-authenticate-translate) mode of operation, as described in
// Bellare, Rogaway, and Wagner "THE EAX MODE OF OPERATION: A TWO-PASS
// AUTHENTICATED-ENCRYPTION SCHEME OPTIMIZED FOR SIMPLICITY AND EFFICIENCY."
// In FSE'04, volume 3017 of LNCS, 2004
package eax
import (
"crypto/cipher"
"crypto/subtle"
"errors"
"github.com/ProtonMail/go-crypto/internal/byteutil"
)
const (
defaultTagSize = 16
defaultNonceSize = 16
)
type eax struct {
block cipher.Block // Only AES-{128, 192, 256} supported
tagSize int // At least 12 bytes recommended
nonceSize int
}
func (e *eax) NonceSize() int {
return e.nonceSize
}
func (e *eax) Overhead() int {
return e.tagSize
}
// NewEAX returns an EAX instance with AES-{KEYLENGTH} and default nonce and
// tag lengths. Supports {128, 192, 256}- bit key length.
func NewEAX(block cipher.Block) (cipher.AEAD, error) {
return NewEAXWithNonceAndTagSize(block, defaultNonceSize, defaultTagSize)
}
// NewEAXWithNonceAndTagSize returns an EAX instance with AES-{keyLength} and
// given nonce and tag lengths in bytes. Panics on zero nonceSize and
// exceedingly long tags.
//
// It is recommended to use at least 12 bytes as tag length (see, for instance,
// NIST SP 800-38D).
//
// Only to be used for compatibility with existing cryptosystems with
// non-standard parameters. For all other cases, prefer NewEAX.
func NewEAXWithNonceAndTagSize(
block cipher.Block, nonceSize, tagSize int) (cipher.AEAD, error) {
if nonceSize < 1 {
return nil, eaxError("Cannot initialize EAX with nonceSize = 0")
}
if tagSize > block.BlockSize() {
return nil, eaxError("Custom tag length exceeds blocksize")
}
return &eax{
block: block,
tagSize: tagSize,
nonceSize: nonceSize,
}, nil
}
func (e *eax) Seal(dst, nonce, plaintext, adata []byte) []byte {
if len(nonce) > e.nonceSize {
panic("crypto/eax: Nonce too long for this instance")
}
ret, out := byteutil.SliceForAppend(dst, len(plaintext) + e.tagSize)
omacNonce := e.omacT(0, nonce)
omacAdata := e.omacT(1, adata)
// Encrypt message using CTR mode and omacNonce as IV
ctr := cipher.NewCTR(e.block, omacNonce)
ciphertextData := out[:len(plaintext)]
ctr.XORKeyStream(ciphertextData, plaintext)
omacCiphertext := e.omacT(2, ciphertextData)
tag := out[len(plaintext):]
for i := 0; i < e.tagSize; i++ {
tag[i] = omacCiphertext[i] ^ omacNonce[i] ^ omacAdata[i]
}
return ret
}
func (e* eax) Open(dst, nonce, ciphertext, adata []byte) ([]byte, error) {
if len(nonce) > e.nonceSize {
panic("crypto/eax: Nonce too long for this instance")
}
if len(ciphertext) < e.tagSize {
return nil, eaxError("Ciphertext shorter than tag length")
}
sep := len(ciphertext) - e.tagSize
// Compute tag
omacNonce := e.omacT(0, nonce)
omacAdata := e.omacT(1, adata)
omacCiphertext := e.omacT(2, ciphertext[:sep])
tag := make([]byte, e.tagSize)
for i := 0; i < e.tagSize; i++ {
tag[i] = omacCiphertext[i] ^ omacNonce[i] ^ omacAdata[i]
}
// Compare tags
if subtle.ConstantTimeCompare(ciphertext[sep:], tag) != 1 {
return nil, eaxError("Tag authentication failed")
}
// Decrypt ciphertext
ret, out := byteutil.SliceForAppend(dst, len(ciphertext))
ctr := cipher.NewCTR(e.block, omacNonce)
ctr.XORKeyStream(out, ciphertext[:sep])
return ret[:sep], nil
}
// Tweakable OMAC - Calls OMAC_K([t]_n || plaintext)
func (e *eax) omacT(t byte, plaintext []byte) []byte {
blockSize := e.block.BlockSize()
byteT := make([]byte, blockSize)
byteT[blockSize-1] = t
concat := append(byteT, plaintext...)
return e.omac(concat)
}
func (e *eax) omac(plaintext []byte) []byte {
blockSize := e.block.BlockSize()
// L ← E_K(0^n); B ← 2L; P ← 4L
L := make([]byte, blockSize)
e.block.Encrypt(L, L)
B := byteutil.GfnDouble(L)
P := byteutil.GfnDouble(B)
// CBC with IV = 0
cbc := cipher.NewCBCEncrypter(e.block, make([]byte, blockSize))
padded := e.pad(plaintext, B, P)
cbcCiphertext := make([]byte, len(padded))
cbc.CryptBlocks(cbcCiphertext, padded)
return cbcCiphertext[len(cbcCiphertext)-blockSize:]
}
func (e *eax) pad(plaintext, B, P []byte) []byte {
// if |M| in {n, 2n, 3n, ...}
blockSize := e.block.BlockSize()
if len(plaintext) != 0 && len(plaintext)%blockSize == 0 {
return byteutil.RightXor(plaintext, B)
}
// else return (M || 1 || 0^(n−1−(|M| % n))) xor→ P
ending := make([]byte, blockSize-len(plaintext)%blockSize)
ending[0] = 0x80
padded := append(plaintext, ending...)
return byteutil.RightXor(padded, P)
}
func eaxError(err string) error {
return errors.New("crypto/eax: " + err)
}

58
vendor/github.com/ProtonMail/go-crypto/eax/eax_test_vectors.go generated vendored Normal file
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package eax
// Test vectors from
// https://web.cs.ucdavis.edu/~rogaway/papers/eax.pdf
var testVectors = []struct {
msg, key, nonce, header, ciphertext string
}{
{"",
"233952DEE4D5ED5F9B9C6D6FF80FF478",
"62EC67F9C3A4A407FCB2A8C49031A8B3",
"6BFB914FD07EAE6B",
"E037830E8389F27B025A2D6527E79D01"},
{"F7FB",
"91945D3F4DCBEE0BF45EF52255F095A4",
"BECAF043B0A23D843194BA972C66DEBD",
"FA3BFD4806EB53FA",
"19DD5C4C9331049D0BDAB0277408F67967E5"},
{"1A47CB4933",
"01F74AD64077F2E704C0F60ADA3DD523",
"70C3DB4F0D26368400A10ED05D2BFF5E",
"234A3463C1264AC6",
"D851D5BAE03A59F238A23E39199DC9266626C40F80"},
{"481C9E39B1",
"D07CF6CBB7F313BDDE66B727AFD3C5E8",
"8408DFFF3C1A2B1292DC199E46B7D617",
"33CCE2EABFF5A79D",
"632A9D131AD4C168A4225D8E1FF755939974A7BEDE"},
{"40D0C07DA5E4",
"35B6D0580005BBC12B0587124557D2C2",
"FDB6B06676EEDC5C61D74276E1F8E816",
"AEB96EAEBE2970E9",
"071DFE16C675CB0677E536F73AFE6A14B74EE49844DD"},
{"4DE3B35C3FC039245BD1FB7D",
"BD8E6E11475E60B268784C38C62FEB22",
"6EAC5C93072D8E8513F750935E46DA1B",
"D4482D1CA78DCE0F",
"835BB4F15D743E350E728414ABB8644FD6CCB86947C5E10590210A4F"},
{"8B0A79306C9CE7ED99DAE4F87F8DD61636",
"7C77D6E813BED5AC98BAA417477A2E7D",
"1A8C98DCD73D38393B2BF1569DEEFC19",
"65D2017990D62528",
"02083E3979DA014812F59F11D52630DA30137327D10649B0AA6E1C181DB617D7F2"},
{"1BDA122BCE8A8DBAF1877D962B8592DD2D56",
"5FFF20CAFAB119CA2FC73549E20F5B0D",
"DDE59B97D722156D4D9AFF2BC7559826",
"54B9F04E6A09189A",
"2EC47B2C4954A489AFC7BA4897EDCDAE8CC33B60450599BD02C96382902AEF7F832A"},
{"6CF36720872B8513F6EAB1A8A44438D5EF11",
"A4A4782BCFFD3EC5E7EF6D8C34A56123",
"B781FCF2F75FA5A8DE97A9CA48E522EC",
"899A175897561D7E",
"0DE18FD0FDD91E7AF19F1D8EE8733938B1E8E7F6D2231618102FDB7FE55FF1991700"},
{"CA40D7446E545FFAED3BD12A740A659FFBBB3CEAB7",
"8395FCF1E95BEBD697BD010BC766AAC3",
"22E7ADD93CFC6393C57EC0B3C17D6B44",
"126735FCC320D25A",
"CB8920F87A6C75CFF39627B56E3ED197C552D295A7CFC46AFC253B4652B1AF3795B124AB6E"},
}

131
vendor/github.com/ProtonMail/go-crypto/eax/random_vectors.go generated vendored Normal file
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// These vectors include key length in {128, 192, 256}, tag size 128, and
// random nonce, header, and plaintext lengths.
// This file was automatically generated.
package eax
var randomVectors = []struct {
key, nonce, header, plaintext, ciphertext string
}{
{"DFDE093F36B0356E5A81F609786982E3",
"1D8AC604419001816905BA72B14CED7E",
"152A1517A998D7A24163FCDD146DE81AC347C8B97088F502093C1ABB8F6E33D9A219C34D7603A18B1F5ABE02E56661B7D7F67E81EC08C1302EF38D80A859486D450E94A4F26AD9E68EEBBC0C857A0FC5CF9E641D63D565A7E361BC8908F5A8DC8FD6",
"1C8EAAB71077FE18B39730A3156ADE29C5EE824C7EE86ED2A253B775603FB237116E654F6FEC588DD27F523A0E01246FE73FE348491F2A8E9ABC6CA58D663F71CDBCF4AD798BE46C42AE6EE8B599DB44A1A48D7BBBBA0F7D2750181E1C5E66967F7D57CBD30AFBDA5727",
"79E7E150934BBEBF7013F61C60462A14D8B15AF7A248AFB8A344EF021C1500E16666891D6E973D8BB56B71A371F12CA34660C4410C016982B20F547E3762A58B7BF4F20236CADCF559E2BE7D783B13723B2741FC7CDC8997D839E39A3DDD2BADB96743DD7049F1BDB0516A262869915B3F70498AFB7B191BF960"},
{"F10619EF02E5D94D7550EB84ED364A21",
"8DC0D4F2F745BBAE835CC5574B942D20",
"FE561358F2E8DF7E1024FF1AE9A8D36EBD01352214505CB99D644777A8A1F6027FA2BDBFC529A9B91136D5F2416CFC5F0F4EC3A1AFD32BDDA23CA504C5A5CB451785FABF4DFE4CD50D817491991A60615B30286361C100A95D1712F2A45F8E374461F4CA2B",
"D7B5A971FC219631D30EFC3664AE3127D9CF3097DAD9C24AC7905D15E8D9B25B026B31D68CAE00975CDB81EB1FD96FD5E1A12E2BB83FA25F1B1D91363457657FC03875C27F2946C5",
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}

92
vendor/github.com/ProtonMail/go-crypto/internal/byteutil/byteutil.go generated vendored Normal file
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// Copyright (C) 2019 ProtonTech AG
// This file contains necessary tools for the aex and ocb packages.
//
// These functions SHOULD NOT be used elsewhere, since they are optimized for
// specific input nature in the EAX and OCB modes of operation.
package byteutil
// GfnDouble computes 2 * input in the field of 2^n elements.
// The irreducible polynomial in the finite field for n=128 is
// x^128 + x^7 + x^2 + x + 1 (equals 0x87)
// Constant-time execution in order to avoid side-channel attacks
func GfnDouble(input []byte) []byte {
if len(input) != 16 {
panic("Doubling in GFn only implemented for n = 128")
}
// If the first bit is zero, return 2L = L << 1
// Else return (L << 1) xor 0^120 10000111
shifted := ShiftBytesLeft(input)
shifted[15] ^= ((input[0] >> 7) * 0x87)
return shifted
}
// ShiftBytesLeft outputs the byte array corresponding to x << 1 in binary.
func ShiftBytesLeft(x []byte) []byte {
l := len(x)
dst := make([]byte, l)
for i := 0; i < l-1; i++ {
dst[i] = (x[i] << 1) | (x[i+1] >> 7)
}
dst[l-1] = x[l-1] << 1
return dst
}
// ShiftNBytesLeft puts in dst the byte array corresponding to x << n in binary.
func ShiftNBytesLeft(dst, x []byte, n int) {
// Erase first n / 8 bytes
copy(dst, x[n/8:])
// Shift the remaining n % 8 bits
bits := uint(n % 8)
l := len(dst)
for i := 0; i < l-1; i++ {
dst[i] = (dst[i] << bits) | (dst[i+1] >> uint(8 - bits))
}
dst[l-1] = dst[l-1] << bits
// Append trailing zeroes
dst = append(dst, make([]byte, n/8)...)
}
// XorBytesMut assumes equal input length, replaces X with X XOR Y
func XorBytesMut(X, Y []byte) {
for i := 0; i < len(X); i++ {
X[i] ^= Y[i]
}
}
// XorBytes assumes equal input length, puts X XOR Y into Z
func XorBytes(Z, X, Y []byte) {
for i := 0; i < len(X); i++ {
Z[i] = X[i] ^ Y[i]
}
}
// RightXor XORs smaller input (assumed Y) at the right of the larger input (assumed X)
func RightXor(X, Y []byte) []byte {
offset := len(X) - len(Y)
xored := make([]byte, len(X));
copy(xored, X)
for i := 0; i < len(Y); i++ {
xored[offset + i] ^= Y[i]
}
return xored
}
// SliceForAppend takes a slice and a requested number of bytes. It returns a
// slice with the contents of the given slice followed by that many bytes and a
// second slice that aliases into it and contains only the extra bytes. If the
// original slice has sufficient capacity then no allocation is performed.
func SliceForAppend(in []byte, n int) (head, tail []byte) {
if total := len(in) + n; cap(in) >= total {
head = in[:total]
} else {
head = make([]byte, total)
copy(head, in)
}
tail = head[len(in):]
return
}

317
vendor/github.com/ProtonMail/go-crypto/ocb/ocb.go generated vendored Normal file
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// Copyright (C) 2019 ProtonTech AG
// Package ocb provides an implementation of the OCB (offset codebook) mode of
// operation, as described in RFC-7253 of the IRTF and in Rogaway, Bellare,
// Black and Krovetz - OCB: A BLOCK-CIPHER MODE OF OPERATION FOR EFFICIENT
// AUTHENTICATED ENCRYPTION (2003).
// Security considerations (from RFC-7253): A private key MUST NOT be used to
// encrypt more than 2^48 blocks. Tag length should be at least 12 bytes (a
// brute-force forging adversary succeeds after 2^{tag length} attempts). A
// single key SHOULD NOT be used to decrypt ciphertext with different tag
// lengths. Nonces need not be secret, but MUST NOT be reused.
// This package only supports underlying block ciphers with 128-bit blocks,
// such as AES-{128, 192, 256}, but may be extended to other sizes.
package ocb
import (
"bytes"
"crypto/cipher"
"crypto/subtle"
"errors"
"github.com/ProtonMail/go-crypto/internal/byteutil"
"math/bits"
)
type ocb struct {
block cipher.Block
tagSize int
nonceSize int
mask mask
// Optimized en/decrypt: For each nonce N used to en/decrypt, the 'Ktop'
// internal variable can be reused for en/decrypting with nonces sharing
// all but the last 6 bits with N. The prefix of the first nonce used to
// compute the new Ktop, and the Ktop value itself, are stored in
// reusableKtop. If using incremental nonces, this saves one block cipher
// call every 63 out of 64 OCB encryptions, and stores one nonce and one
// output of the block cipher in memory only.
reusableKtop reusableKtop
}
type mask struct {
// L_*, L_$, (L_i)_{i ∈ N}
lAst []byte
lDol []byte
L [][]byte
}
type reusableKtop struct {
noncePrefix []byte
Ktop []byte
}
const (
defaultTagSize = 16
defaultNonceSize = 15
)
const (
enc = iota
dec
)
func (o *ocb) NonceSize() int {
return o.nonceSize
}
func (o *ocb) Overhead() int {
return o.tagSize
}
// NewOCB returns an OCB instance with the given block cipher and default
// tag and nonce sizes.
func NewOCB(block cipher.Block) (cipher.AEAD, error) {
return NewOCBWithNonceAndTagSize(block, defaultNonceSize, defaultTagSize)
}
// NewOCBWithNonceAndTagSize returns an OCB instance with the given block
// cipher, nonce length, and tag length. Panics on zero nonceSize and
// exceedingly long tag size.
//
// It is recommended to use at least 12 bytes as tag length.
func NewOCBWithNonceAndTagSize(
block cipher.Block, nonceSize, tagSize int) (cipher.AEAD, error) {
if block.BlockSize() != 16 {
return nil, ocbError("Block cipher must have 128-bit blocks")
}
if nonceSize < 1 {
return nil, ocbError("Incorrect nonce length")
}
if nonceSize >= block.BlockSize() {
return nil, ocbError("Nonce length exceeds blocksize - 1")
}
if tagSize > block.BlockSize() {
return nil, ocbError("Custom tag length exceeds blocksize")
}
return &ocb{
block: block,
tagSize: tagSize,
nonceSize: nonceSize,
mask: initializeMaskTable(block),
reusableKtop: reusableKtop{
noncePrefix: nil,
Ktop: nil,
},
}, nil
}
func (o *ocb) Seal(dst, nonce, plaintext, adata []byte) []byte {
if len(nonce) > o.nonceSize {
panic("crypto/ocb: Incorrect nonce length given to OCB")
}
ret, out := byteutil.SliceForAppend(dst, len(plaintext)+o.tagSize)
o.crypt(enc, out, nonce, adata, plaintext)
return ret
}
func (o *ocb) Open(dst, nonce, ciphertext, adata []byte) ([]byte, error) {
if len(nonce) > o.nonceSize {
panic("Nonce too long for this instance")
}
if len(ciphertext) < o.tagSize {
return nil, ocbError("Ciphertext shorter than tag length")
}
sep := len(ciphertext) - o.tagSize
ret, out := byteutil.SliceForAppend(dst, len(ciphertext))
ciphertextData := ciphertext[:sep]
tag := ciphertext[sep:]
o.crypt(dec, out, nonce, adata, ciphertextData)
if subtle.ConstantTimeCompare(ret[sep:], tag) == 1 {
ret = ret[:sep]
return ret, nil
}
for i := range out {
out[i] = 0
}
return nil, ocbError("Tag authentication failed")
}
// On instruction enc (resp. dec), crypt is the encrypt (resp. decrypt)
// function. It returns the resulting plain/ciphertext with the tag appended.
func (o *ocb) crypt(instruction int, Y, nonce, adata, X []byte) []byte {
//
// Consider X as a sequence of 128-bit blocks
//
// Note: For encryption (resp. decryption), X is the plaintext (resp., the
// ciphertext without the tag).
blockSize := o.block.BlockSize()
//
// Nonce-dependent and per-encryption variables
//
// Zero out the last 6 bits of the nonce into truncatedNonce to see if Ktop
// is already computed.
truncatedNonce := make([]byte, len(nonce))
copy(truncatedNonce, nonce)
truncatedNonce[len(truncatedNonce)-1] &= 192
Ktop := make([]byte, blockSize)
if bytes.Equal(truncatedNonce, o.reusableKtop.noncePrefix) {
Ktop = o.reusableKtop.Ktop
} else {
// Nonce = num2str(TAGLEN mod 128, 7) || zeros(120 - bitlen(N)) || 1 || N
paddedNonce := append(make([]byte, blockSize-1-len(nonce)), 1)
paddedNonce = append(paddedNonce, truncatedNonce...)
paddedNonce[0] |= byte(((8 * o.tagSize) % (8 * blockSize)) << 1)
// Last 6 bits of paddedNonce are already zero. Encrypt into Ktop
paddedNonce[blockSize-1] &= 192
Ktop = paddedNonce
o.block.Encrypt(Ktop, Ktop)
o.reusableKtop.noncePrefix = truncatedNonce
o.reusableKtop.Ktop = Ktop
}
// Stretch = Ktop || ((lower half of Ktop) XOR (lower half of Ktop << 8))
xorHalves := make([]byte, blockSize/2)
byteutil.XorBytes(xorHalves, Ktop[:blockSize/2], Ktop[1:1+blockSize/2])
stretch := append(Ktop, xorHalves...)
bottom := int(nonce[len(nonce)-1] & 63)
offset := make([]byte, len(stretch))
byteutil.ShiftNBytesLeft(offset, stretch, bottom)
offset = offset[:blockSize]
//
// Process any whole blocks
//
// Note: For encryption Y is ciphertext || tag, for decryption Y is
// plaintext || tag.
checksum := make([]byte, blockSize)
m := len(X) / blockSize
for i := 0; i < m; i++ {
index := bits.TrailingZeros(uint(i + 1))
if len(o.mask.L)-1 < index {
o.mask.extendTable(index)
}
byteutil.XorBytesMut(offset, o.mask.L[bits.TrailingZeros(uint(i+1))])
blockX := X[i*blockSize : (i+1)*blockSize]
blockY := Y[i*blockSize : (i+1)*blockSize]
byteutil.XorBytes(blockY, blockX, offset)
switch instruction {
case enc:
o.block.Encrypt(blockY, blockY)
byteutil.XorBytesMut(blockY, offset)
byteutil.XorBytesMut(checksum, blockX)
case dec:
o.block.Decrypt(blockY, blockY)
byteutil.XorBytesMut(blockY, offset)
byteutil.XorBytesMut(checksum, blockY)
}
}
//
// Process any final partial block and compute raw tag
//
tag := make([]byte, blockSize)
if len(X)%blockSize != 0 {
byteutil.XorBytesMut(offset, o.mask.lAst)
pad := make([]byte, blockSize)
o.block.Encrypt(pad, offset)
chunkX := X[blockSize*m:]
chunkY := Y[blockSize*m : len(X)]
byteutil.XorBytes(chunkY, chunkX, pad[:len(chunkX)])
// P_* || bit(1) || zeroes(127) - len(P_*)
switch instruction {
case enc:
paddedY := append(chunkX, byte(128))
paddedY = append(paddedY, make([]byte, blockSize-len(chunkX)-1)...)
byteutil.XorBytesMut(checksum, paddedY)
case dec:
paddedX := append(chunkY, byte(128))
paddedX = append(paddedX, make([]byte, blockSize-len(chunkY)-1)...)
byteutil.XorBytesMut(checksum, paddedX)
}
byteutil.XorBytes(tag, checksum, offset)
byteutil.XorBytesMut(tag, o.mask.lDol)
o.block.Encrypt(tag, tag)
byteutil.XorBytesMut(tag, o.hash(adata))
copy(Y[blockSize*m+len(chunkY):], tag[:o.tagSize])
} else {
byteutil.XorBytes(tag, checksum, offset)
byteutil.XorBytesMut(tag, o.mask.lDol)
o.block.Encrypt(tag, tag)
byteutil.XorBytesMut(tag, o.hash(adata))
copy(Y[blockSize*m:], tag[:o.tagSize])
}
return Y
}
// This hash function is used to compute the tag. Per design, on empty input it
// returns a slice of zeros, of the same length as the underlying block cipher
// block size.
func (o *ocb) hash(adata []byte) []byte {
//
// Consider A as a sequence of 128-bit blocks
//
A := make([]byte, len(adata))
copy(A, adata)
blockSize := o.block.BlockSize()
//
// Process any whole blocks
//
sum := make([]byte, blockSize)
offset := make([]byte, blockSize)
m := len(A) / blockSize
for i := 0; i < m; i++ {
chunk := A[blockSize*i : blockSize*(i+1)]
index := bits.TrailingZeros(uint(i + 1))
// If the mask table is too short
if len(o.mask.L)-1 < index {
o.mask.extendTable(index)
}
byteutil.XorBytesMut(offset, o.mask.L[index])
byteutil.XorBytesMut(chunk, offset)
o.block.Encrypt(chunk, chunk)
byteutil.XorBytesMut(sum, chunk)
}
//
// Process any final partial block; compute final hash value
//
if len(A)%blockSize != 0 {
byteutil.XorBytesMut(offset, o.mask.lAst)
// Pad block with 1 || 0 ^ 127 - bitlength(a)
ending := make([]byte, blockSize-len(A)%blockSize)
ending[0] = 0x80
encrypted := append(A[blockSize*m:], ending...)
byteutil.XorBytesMut(encrypted, offset)
o.block.Encrypt(encrypted, encrypted)
byteutil.XorBytesMut(sum, encrypted)
}
return sum
}
func initializeMaskTable(block cipher.Block) mask {
//
// Key-dependent variables
//
lAst := make([]byte, block.BlockSize())
block.Encrypt(lAst, lAst)
lDol := byteutil.GfnDouble(lAst)
L := make([][]byte, 1)
L[0] = byteutil.GfnDouble(lDol)
return mask{
lAst: lAst,
lDol: lDol,
L: L,
}
}
// Extends the L array of mask m up to L[limit], with L[i] = GfnDouble(L[i-1])
func (m *mask) extendTable(limit int) {
for i := len(m.L); i <= limit; i++ {
m.L = append(m.L, byteutil.GfnDouble(m.L[i-1]))
}
}
func ocbError(err string) error {
return errors.New("crypto/ocb: " + err)
}

136
vendor/github.com/ProtonMail/go-crypto/ocb/random_vectors.go generated vendored Normal file
View File

@@ -0,0 +1,136 @@
// In the test vectors provided by RFC 7253, the "bottom"
// internal variable, which defines "offset" for the first time, does not
// exceed 15. However, it can attain values up to 63.
// These vectors include key length in {128, 192, 256}, tag size 128, and
// random nonce, header, and plaintext lengths.
// This file was automatically generated.
package ocb
var randomVectors = []struct {
key, nonce, header, plaintext, ciphertext string
}{
{"9438C5D599308EAF13F800D2D31EA7F0",
"C38EE4801BEBFFA1CD8635BE",
"0E507B7DADD8A98CDFE272D3CB6B3E8332B56AE583FB049C0874D4200BED16BD1A044182434E9DA0E841F182DFD5B3016B34641CED0784F1745F63AB3D0DA22D3351C9EF9A658B8081E24498EBF61FCE40DA6D8E184536",
"962D227786FB8913A8BAD5DC3250",
"EEDEF5FFA5986D1E3BF86DDD33EF9ADC79DCA06E215FA772CCBA814F63AD"},
{"BA7DE631C7D6712167C6724F5B9A2B1D",
"35263EBDA05765DC0E71F1F5",
"0103257B4224507C0242FEFE821EA7FA42E0A82863E5F8B68F7D881B4B44FA428A2B6B21D2F591260802D8AB6D83",
"9D6D1FC93AE8A64E7889B7B2E3521EFA9B920A8DDB692E6F833DDC4A38AFA535E5E2A3ED82CB7E26404AB86C54D01C4668F28398C2DF33D5D561CBA1C8DCFA7A912F5048E545B59483C0E3221F54B14DAA2E4EB657B3BEF9554F34CAD69B2724AE962D3D8A",
"E93852D1985C5E775655E937FA79CE5BF28A585F2AF53A5018853B9634BE3C84499AC0081918FDCE0624494D60E25F76ACD6853AC7576E3C350F332249BFCABD4E73CEABC36BE4EDDA40914E598AE74174A0D7442149B26990899491BDDFE8FC54D6C18E83AE9E9A6FFBF5D376565633862EEAD88D"},
{"2E74B25289F6FD3E578C24866E9C72A5",
"FD912F15025AF8414642BA1D1D",
"FB5FB8C26F365EEDAB5FE260C6E3CCD27806729C8335F146063A7F9EA93290E56CF84576EB446350D22AD730547C267B1F0BBB97EB34E1E2C41A",
"6C092EBF78F76EE8C1C6E592277D9545BA16EDB67BC7D8480B9827702DC2F8A129E2B08A2CE710CA7E1DA45CE162BB6CD4B512E632116E2211D3C90871EFB06B8D4B902681C7FB",
"6AC0A77F26531BF4F354A1737F99E49BE32ECD909A7A71AD69352906F54B08A9CE9B8CA5D724CBFFC5673437F23F630697F3B84117A1431D6FA8CC13A974FB4AD360300522E09511B99E71065D5AC4BBCB1D791E864EF4"},
{"E7EC507C802528F790AFF5303A017B17",
"4B97A7A568940A9E3CE7A99E93031E",
"28349BDC5A09390C480F9B8AA3EDEA3DDB8B9D64BCA322C570B8225DF0E31190DAB25A4014BA39519E02ABFB12B89AA28BBFD29E486E7FB28734258C817B63CED9912DBAFEBB93E2798AB2890DE3B0ACFCFF906AB15563EF7823CE83D27CDB251195E22BD1337BCBDE65E7C2C427321C463C2777BFE5AEAA",
"9455B3EA706B74",
"7F33BA3EA848D48A96B9530E26888F43EBD4463C9399B6"},
{"6C928AA3224736F28EE7378DE0090191",
"8936138E2E4C6A13280017A1622D",
"6202717F2631565BDCDC57C6584543E72A7C8BD444D0D108ED35069819633C",
"DA0691439E5F035F3E455269D14FE5C201C8C9B0A3FE2D3F86BCC59387C868FE65733D388360B31E3CE28B4BF6A8BE636706B536D5720DB66B47CF1C7A5AFD6F61E0EF90F1726D6B0E169F9A768B2B7AE4EE00A17F630AC905FCAAA1B707FFF25B3A1AAE83B504837C64A5639B2A34002B300EC035C9B43654DA55",
"B8804D182AB0F0EEB464FA7BD1329AD6154F982013F3765FEDFE09E26DAC078C9C1439BFC1159D6C02A25E3FF83EF852570117B315852AD5EE20E0FA3AA0A626B0E43BC0CEA38B44579DD36803455FB46989B90E6D229F513FD727AF8372517E9488384C515D6067704119C931299A0982EDDFB9C2E86A90C450C077EB222511EC9CCABC9FCFDB19F70088"},
{"ECEA315CA4B3F425B0C9957A17805EA4",
"664CDAE18403F4F9BA13015A44FC",
"642AFB090D6C6DB46783F08B01A3EF2A8FEB5736B531EAC226E7888FCC8505F396818F83105065FACB3267485B9E5E4A0261F621041C08FCCB2A809A49AB5252A91D0971BCC620B9D614BD77E57A0EED2FA5",
"6852C31F8083E20E364CEA21BB7854D67CEE812FE1C9ED2425C0932A90D3780728D1BB",
"2ECEF962A9695A463ADABB275BDA9FF8B2BA57AEC2F52EFFB700CD9271A74D2A011C24AEA946051BD6291776429B7E681BA33E"},
{"4EE616C4A58AAA380878F71A373461F6",
"91B8C9C176D9C385E9C47E52",
"CDA440B7F9762C572A718AC754EDEECC119E5EE0CCB9FEA4FFB22EEE75087C032EBF3DA9CDD8A28CC010B99ED45143B41A4BA50EA2A005473F89639237838867A57F23B0F0ED3BF22490E4501DAC9C658A9B9F",
"D6E645FA9AE410D15B8123FD757FA356A8DBE9258DDB5BE88832E615910993F497EC",
"B70ED7BF959FB2AAED4F36174A2A99BFB16992C8CDF369C782C4DB9C73DE78C5DB8E0615F647243B97ACDB24503BC9CADC48"},
{"DCD475773136C830D5E3D0C5FE05B7FF",
"BB8E1FBB483BE7616A922C4A",
"36FEF2E1CB29E76A6EA663FC3AF66ECD7404F466382F7B040AABED62293302B56E8783EF7EBC21B4A16C3E78A7483A0A403F253A2CDC5BBF79DC3DAE6C73F39A961D8FBBE8D41B",
"441E886EA38322B2437ECA7DEB5282518865A66780A454E510878E61BFEC3106A3CD93D2A02052E6F9E1832F9791053E3B76BF4C07EFDD6D4106E3027FABB752E60C1AA425416A87D53938163817A1051EBA1D1DEEB4B9B25C7E97368B52E5911A31810B0EC5AF547559B6142D9F4C4A6EF24A4CF75271BF9D48F62B",
"1BE4DD2F4E25A6512C2CC71D24BBB07368589A94C2714962CD0ACE5605688F06342587521E75F0ACAFFD86212FB5C34327D238DB36CF2B787794B9A4412E7CD1410EA5DDD2450C265F29CF96013CD213FD2880657694D718558964BC189B4A84AFCF47EB012935483052399DBA5B088B0A0477F20DFE0E85DCB735E21F22A439FB837DD365A93116D063E607"},
{"3FBA2B3D30177FFE15C1C59ED2148BB2C091F5615FBA7C07",
"FACF804A4BEBF998505FF9DE",
"8213B9263B2971A5BDA18DBD02208EE1",
"15B323926993B326EA19F892D704439FC478828322AF72118748284A1FD8A6D814E641F70512FD706980337379F31DC63355974738D7FEA87AD2858C0C2EBBFBE74371C21450072373C7B651B334D7C4D43260B9D7CCD3AF9EDB",
"6D35DC1469B26E6AAB26272A41B46916397C24C485B61162E640A062D9275BC33DDCFD3D9E1A53B6C8F51AC89B66A41D59B3574197A40D9B6DCF8A4E2A001409C8112F16B9C389E0096179DB914E05D6D11ED0005AD17E1CE105A2F0BAB8F6B1540DEB968B7A5428FF44"},
{"53B52B8D4D748BCDF1DDE68857832FA46227FA6E2F32EFA1",
"0B0EF53D4606B28D1398355F",
"F23882436349094AF98BCACA8218E81581A043B19009E28EFBF2DE37883E04864148CC01D240552CA8844EC1456F42034653067DA67E80F87105FD06E14FF771246C9612867BE4D215F6D761",
"F15030679BD4088D42CAC9BF2E9606EAD4798782FA3ED8C57EBE7F84A53236F51B25967C6489D0CD20C9EEA752F9BC",
"67B96E2D67C3729C96DAEAEDF821D61C17E648643A2134C5621FEC621186915AD80864BFD1EB5B238BF526A679385E012A457F583AFA78134242E9D9C1B4E4"},
{"0272DD80F23399F49BFC320381A5CD8225867245A49A7D41",
"5C83F4896D0738E1366B1836",
"69B0337289B19F73A12BAEEA857CCAF396C11113715D9500CCCF48BA08CFF12BC8B4BADB3084E63B85719DB5058FA7C2C11DEB096D7943CFA7CAF5",
"C01AD10FC8B562CD17C7BC2FAB3E26CBDFF8D7F4DEA816794BBCC12336991712972F52816AABAB244EB43B0137E2BAC1DD413CE79531E78BEF782E6B439612BB3AEF154DE3502784F287958EBC159419F9EBA27916A28D6307324129F506B1DE80C1755A929F87",
"FEFE52DD7159C8DD6E8EC2D3D3C0F37AB6CB471A75A071D17EC4ACDD8F3AA4D7D4F7BB559F3C09099E3D9003E5E8AA1F556B79CECDE66F85B08FA5955E6976BF2695EA076388A62D2AD5BAB7CBF1A7F3F4C8D5CDF37CDE99BD3E30B685D9E5EEE48C7C89118EF4878EB89747F28271FA2CC45F8E9E7601"},
{"3EEAED04A455D6E5E5AB53CFD5AFD2F2BC625C7BF4BE49A5",
"36B88F63ADBB5668588181D774",
"D367E3CB3703E762D23C6533188EF7028EFF9D935A3977150361997EC9DEAF1E4794BDE26AA8B53C124980B1362EC86FCDDFC7A90073171C1BAEE351A53234B86C66E8AB92FAE99EC6967A6D3428892D80",
"573454C719A9A55E04437BF7CBAAF27563CCCD92ADD5E515CD63305DFF0687E5EEF790C5DCA5C0033E9AB129505E2775438D92B38F08F3B0356BA142C6F694",
"E9F79A5B432D9E682C9AAA5661CFC2E49A0FCB81A431E54B42EB73DD3BED3F377FEC556ABA81624BA64A5D739AD41467460088F8D4F442180A9382CA635745473794C382FCDDC49BA4EB6D8A44AE3C"},
{"B695C691538F8CBD60F039D0E28894E3693CC7C36D92D79D",
"BC099AEB637361BAC536B57618",
"BFFF1A65AE38D1DC142C71637319F5F6508E2CB33C9DCB94202B359ED5A5ED8042E7F4F09231D32A7242976677E6F4C549BF65FADC99E5AF43F7A46FD95E16C2",
"081DF3FD85B415D803F0BE5AC58CFF0023FDDED99788296C3731D8",
"E50C64E3614D94FE69C47092E46ACC9957C6FEA2CCBF96BC62FBABE7424753C75F9C147C42AE26FE171531"},
{"C9ACBD2718F0689A1BE9802A551B6B8D9CF5614DAF5E65ED",
"B1B0AAF373B8B026EB80422051D8",
"6648C0E61AC733C76119D23FB24548D637751387AA2EAE9D80E912B7BD486CAAD9EAF4D7A5FE2B54AAD481E8EC94BB4D558000896E2010462B70C9FED1E7273080D1",
"189F591F6CB6D59AFEDD14C341741A8F1037DC0DF00FC57CE65C30F49E860255CEA5DC6019380CC0FE8880BC1A9E685F41C239C38F36E3F2A1388865C5C311059C0A",
"922A5E949B61D03BE34AB5F4E58607D4504EA14017BB363DAE3C873059EA7A1C77A746FB78981671D26C2CF6D9F24952D510044CE02A10177E9DB42D0145211DFE6E84369C5E3BC2669EAB4147B2822895F9"},
{"7A832BD2CF5BF4919F353CE2A8C86A5E406DA2D52BE16A72",
"2F2F17CECF7E5A756D10785A3CB9DB",
"61DA05E3788CC2D8405DBA70C7A28E5AF699863C9F72E6C6770126929F5D6FA267F005EBCF49495CB46400958A3AE80D1289D1C671",
"44E91121195A41AF14E8CFDBD39A4B517BE0DF1A72977ED8A3EEF8EEDA1166B2EB6DB2C4AE2E74FA0F0C74537F659BFBD141E5DDEC67E64EDA85AABD3F52C85A785B9FB3CECD70E7DF",
"BEDF596EA21288D2B84901E188F6EE1468B14D5161D3802DBFE00D60203A24E2AB62714BF272A45551489838C3A7FEAADC177B591836E73684867CCF4E12901DCF2064058726BBA554E84ADC5136F507E961188D4AF06943D3"},
{"1508E8AE9079AA15F1CEC4F776B4D11BCCB061B58AA56C18",
"BCA625674F41D1E3AB47672DC0C3",
"8B12CF84F16360F0EAD2A41BC021530FFCEC7F3579CAE658E10E2D3D81870F65AFCED0C77C6C4C6E6BA424FF23088C796BA6195ABA35094BF1829E089662E7A95FC90750AE16D0C8AFA55DAC789D7735B970B58D4BE7CEC7341DA82A0179A01929C27A59C5063215B859EA43",
"E525422519ECE070E82C",
"B47BC07C3ED1C0A43BA52C43CBACBCDBB29CAF1001E09FDF7107"},
{"7550C2761644E911FE9ADD119BAC07376BEA442845FEAD876D7E7AC1B713E464",
"36D2EC25ADD33CDEDF495205BBC923",
"7FCFE81A3790DE97FFC3DE160C470847EA7E841177C2F759571CBD837EA004A6CA8C6F4AEBFF2E9FD552D73EB8A30705D58D70C0B67AEEA280CBBF0A477358ACEF1E7508F2735CD9A0E4F9AC92B8C008F575D3B6278F1C18BD01227E3502E5255F3AB1893632AD00C717C588EF652A51A43209E7EE90",
"2B1A62F8FDFAA3C16470A21AD307C9A7D03ADE8EF72C69B06F8D738CDE578D7AEFD0D40BD9C022FB9F580DF5394C998ACCCEFC5471A3996FB8F1045A81FDC6F32D13502EA65A211390C8D882B8E0BEFD8DD8CBEF51D1597B124E9F7F",
"C873E02A22DB89EB0787DB6A60B99F7E4A0A085D5C4232A81ADCE2D60AA36F92DDC33F93DD8640AC0E08416B187FB382B3EC3EE85A64B0E6EE41C1366A5AD2A282F66605E87031CCBA2FA7B2DA201D975994AADE3DD1EE122AE09604AD489B84BF0C1AB7129EE16C6934850E"},
{"A51300285E554FDBDE7F771A9A9A80955639DD87129FAEF74987C91FB9687C71",
"81691D5D20EC818FCFF24B33DECC",
"C948093218AA9EB2A8E44A87EEA73FC8B6B75A196819A14BD83709EA323E8DF8B491045220E1D88729A38DBCFFB60D3056DAD4564498FD6574F74512945DEB34B69329ACED9FFC05D5D59DFCD5B973E2ACAFE6AD1EF8BBBC49351A2DD12508ED89ED",
"EB861165DAF7625F827C6B574ED703F03215",
"C6CD1CE76D2B3679C1B5AA1CFD67CCB55444B6BFD3E22C81CBC9BB738796B83E54E3"},
{"8CE0156D26FAEB7E0B9B800BBB2E9D4075B5EAC5C62358B0E7F6FCE610223282",
"D2A7B94DD12CDACA909D3AD7",
"E021A78F374FC271389AB9A3E97077D755",
"7C26000B58929F5095E1CEE154F76C2A299248E299F9B5ADE6C403AA1FD4A67FD4E0232F214CE7B919EE7A1027D2B76C57475715CD078461",
"C556FB38DF069B56F337B5FF5775CE6EAA16824DFA754F20B78819028EA635C3BB7AA731DE8776B2DCB67DCA2D33EEDF3C7E52EA450013722A41755A0752433ED17BDD5991AAE77A"},
{"1E8000A2CE00A561C9920A30BF0D7B983FEF8A1014C8F04C35CA6970E6BA02BD",
"65ED3D63F79F90BBFD19775E",
"336A8C0B7243582A46B221AA677647FCAE91",
"134A8B34824A290E7B",
"914FBEF80D0E6E17F8BDBB6097EBF5FBB0554952DC2B9E5151"},
{"53D5607BBE690B6E8D8F6D97F3DF2BA853B682597A214B8AA0EA6E598650AF15",
"C391A856B9FE234E14BA1AC7BB40FF",
"479682BC21349C4BE1641D5E78FE2C79EC1B9CF5470936DCAD9967A4DCD7C4EFADA593BC9EDE71E6A08829B8580901B61E274227E9D918502DE3",
"EAD154DC09C5E26C5D26FF33ED148B27120C7F2C23225CC0D0631B03E1F6C6D96FEB88C1A4052ACB4CE746B884B6502931F407021126C6AAB8C514C077A5A38438AE88EE",
"938821286EBB671D999B87C032E1D6055392EB564E57970D55E545FC5E8BAB90E6E3E3C0913F6320995FC636D72CD9919657CC38BD51552F4A502D8D1FE56DB33EBAC5092630E69EBB986F0E15CEE9FC8C052501"},
{"294362FCC984F440CEA3E9F7D2C06AF20C53AAC1B3738CA2186C914A6E193ABB",
"B15B61C8BB39261A8F55AB178EC3",
"D0729B6B75BB",
"2BD089ADCE9F334BAE3B065996C7D616DD0C27DF4218DCEEA0FBCA0F968837CE26B0876083327E25681FDDD620A32EC0DA12F73FAE826CC94BFF2B90A54D2651",
"AC94B25E4E21DE2437B806966CCD5D9385EF0CD4A51AB9FA6DE675C7B8952D67802E9FEC1FDE9F5D1EAB06057498BC0EEA454804FC9D2068982A3E24182D9AC2E7AB9994DDC899A604264583F63D066B"},
{"959DBFEB039B1A5B8CE6A44649B602AAA5F98A906DB96143D202CD2024F749D9",
"01D7BDB1133E9C347486C1EFA6",
"F3843955BD741F379DD750585EDC55E2CDA05CCBA8C1F4622AC2FE35214BC3A019B8BD12C4CC42D9213D1E1556941E8D8450830287FFB3B763A13722DD4140ED9846FB5FFF745D7B0B967D810A068222E10B259AF1D392035B0D83DC1498A6830B11B2418A840212599171E0258A1C203B05362978",
"A21811232C950FA8B12237C2EBD6A7CD2C3A155905E9E0C7C120",
"63C1CE397B22F1A03F1FA549B43178BC405B152D3C95E977426D519B3DFCA28498823240592B6EEE7A14"},
{"096AE499F5294173F34FF2B375F0E5D5AB79D0D03B33B1A74D7D576826345DF4",
"0C52B3D11D636E5910A4DD76D32C",
"229E9ECA3053789E937447BC719467075B6138A142DA528DA8F0CF8DDF022FD9AF8E74779BA3AC306609",
"8B7A00038783E8BAF6EDEAE0C4EAB48FC8FD501A588C7E4A4DB71E3604F2155A97687D3D2FFF8569261375A513CF4398CE0F87CA1658A1050F6EF6C4EA3E25",
"C20B6CF8D3C8241825FD90B2EDAC7593600646E579A8D8DAAE9E2E40C3835FE801B2BE4379131452BC5182C90307B176DFBE2049544222FE7783147B690774F6D9D7CEF52A91E61E298E9AA15464AC"},
}

78
vendor/github.com/ProtonMail/go-crypto/ocb/rfc7253_test_vectors_suite_a.go generated vendored Normal file
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package ocb
import (
"encoding/hex"
)
// Test vectors from https://tools.ietf.org/html/rfc7253. Note that key is
// shared across tests.
var testKey, _ = hex.DecodeString("000102030405060708090A0B0C0D0E0F")
var rfc7253testVectors = []struct {
nonce, header, plaintext, ciphertext string
}{
{"BBAA99887766554433221100",
"",
"",
"785407BFFFC8AD9EDCC5520AC9111EE6"},
{"BBAA99887766554433221101",
"0001020304050607",
"0001020304050607",
"6820B3657B6F615A5725BDA0D3B4EB3A257C9AF1F8F03009"},
{"BBAA99887766554433221102",
"0001020304050607",
"",
"81017F8203F081277152FADE694A0A00"},
{"BBAA99887766554433221103",
"",
"0001020304050607",
"45DD69F8F5AAE72414054CD1F35D82760B2CD00D2F99BFA9"},
{"BBAA99887766554433221104",
"000102030405060708090A0B0C0D0E0F",
"000102030405060708090A0B0C0D0E0F",
"571D535B60B277188BE5147170A9A22C3AD7A4FF3835B8C5701C1CCEC8FC3358"},
{"BBAA99887766554433221105",
"000102030405060708090A0B0C0D0E0F",
"",
"8CF761B6902EF764462AD86498CA6B97"},
{"BBAA99887766554433221106",
"",
"000102030405060708090A0B0C0D0E0F",
"5CE88EC2E0692706A915C00AEB8B2396F40E1C743F52436BDF06D8FA1ECA343D"},
{"BBAA99887766554433221107",
"000102030405060708090A0B0C0D0E0F1011121314151617",
"000102030405060708090A0B0C0D0E0F1011121314151617",
"1CA2207308C87C010756104D8840CE1952F09673A448A122C92C62241051F57356D7F3C90BB0E07F"},
{"BBAA99887766554433221108",
"000102030405060708090A0B0C0D0E0F1011121314151617",
"",
"6DC225A071FC1B9F7C69F93B0F1E10DE"},
{"BBAA99887766554433221109",
"",
"000102030405060708090A0B0C0D0E0F1011121314151617",
"221BD0DE7FA6FE993ECCD769460A0AF2D6CDED0C395B1C3CE725F32494B9F914D85C0B1EB38357FF"},
{"BBAA9988776655443322110A",
"000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F",
"000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F",
"BD6F6C496201C69296C11EFD138A467ABD3C707924B964DEAFFC40319AF5A48540FBBA186C5553C68AD9F592A79A4240"},
{"BBAA9988776655443322110B",
"000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F",
"",
"FE80690BEE8A485D11F32965BC9D2A32"},
{"BBAA9988776655443322110C",
"",
"000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F",
"2942BFC773BDA23CABC6ACFD9BFD5835BD300F0973792EF46040C53F1432BCDFB5E1DDE3BC18A5F840B52E653444D5DF"},
{"BBAA9988776655443322110D",
"000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F2021222324252627",
"000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F2021222324252627",
"D5CA91748410C1751FF8A2F618255B68A0A12E093FF454606E59F9C1D0DDC54B65E8628E568BAD7AED07BA06A4A69483A7035490C5769E60"},
{"BBAA9988776655443322110E",
"000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F2021222324252627",
"",
"C5CD9D1850C141E358649994EE701B68"},
{"BBAA9988776655443322110F",
"",
"000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F2021222324252627",
"4412923493C57D5DE0D700F753CCE0D1D2D95060122E9F15A5DDBFC5787E50B5CC55EE507BCB084E479AD363AC366B95A98CA5F3000B1479"},
}

24
vendor/github.com/ProtonMail/go-crypto/ocb/rfc7253_test_vectors_suite_b.go generated vendored Normal file
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package ocb
// Second set of test vectors from https://tools.ietf.org/html/rfc7253
var rfc7253TestVectorTaglen96 = struct {
key, nonce, header, plaintext, ciphertext string
}{"0F0E0D0C0B0A09080706050403020100",
"BBAA9988776655443322110D",
"000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F2021222324252627",
"000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F2021222324252627",
"1792A4E31E0755FB03E31B22116E6C2DDF9EFD6E33D536F1A0124B0A55BAE884ED93481529C76B6AD0C515F4D1CDD4FDAC4F02AA"}
var rfc7253AlgorithmTest = []struct {
KEYLEN, TAGLEN int
OUTPUT string }{
{128, 128, "67E944D23256C5E0B6C61FA22FDF1EA2"},
{192, 128, "F673F2C3E7174AAE7BAE986CA9F29E17"},
{256, 128, "D90EB8E9C977C88B79DD793D7FFA161C"},
{128, 96, "77A3D8E73589158D25D01209"},
{192, 96, "05D56EAD2752C86BE6932C5E"},
{256, 96, "5458359AC23B0CBA9E6330DD"},
{128, 64, "192C9B7BD90BA06A"},
{192, 64, "0066BC6E0EF34E24"},
{256, 64, "7D4EA5D445501CBE"},
}

153
vendor/github.com/ProtonMail/go-crypto/openpgp/aes/keywrap/keywrap.go generated vendored Normal file
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@@ -0,0 +1,153 @@
// Copyright 2014 Matthew Endsley
// All rights reserved
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted providing that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
// STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
// IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
// Package keywrap is an implementation of the RFC 3394 AES key wrapping
// algorithm. This is used in OpenPGP with elliptic curve keys.
package keywrap
import (
"crypto/aes"
"encoding/binary"
"errors"
)
var (
// ErrWrapPlaintext is returned if the plaintext is not a multiple
// of 64 bits.
ErrWrapPlaintext = errors.New("keywrap: plainText must be a multiple of 64 bits")
// ErrUnwrapCiphertext is returned if the ciphertext is not a
// multiple of 64 bits.
ErrUnwrapCiphertext = errors.New("keywrap: cipherText must by a multiple of 64 bits")
// ErrUnwrapFailed is returned if unwrapping a key fails.
ErrUnwrapFailed = errors.New("keywrap: failed to unwrap key")
// NB: the AES NewCipher call only fails if the key is an invalid length.
// ErrInvalidKey is returned when the AES key is invalid.
ErrInvalidKey = errors.New("keywrap: invalid AES key")
)
// Wrap a key using the RFC 3394 AES Key Wrap Algorithm.
func Wrap(key, plainText []byte) ([]byte, error) {
if len(plainText)%8 != 0 {
return nil, ErrWrapPlaintext
}
c, err := aes.NewCipher(key)
if err != nil {
return nil, ErrInvalidKey
}
nblocks := len(plainText) / 8
// 1) Initialize variables.
var block [aes.BlockSize]byte
// - Set A = IV, an initial value (see 2.2.3)
for ii := 0; ii < 8; ii++ {
block[ii] = 0xA6
}
// - For i = 1 to n
// - Set R[i] = P[i]
intermediate := make([]byte, len(plainText))
copy(intermediate, plainText)
// 2) Calculate intermediate values.
for ii := 0; ii < 6; ii++ {
for jj := 0; jj < nblocks; jj++ {
// - B = AES(K, A | R[i])
copy(block[8:], intermediate[jj*8:jj*8+8])
c.Encrypt(block[:], block[:])
// - A = MSB(64, B) ^ t where t = (n*j)+1
t := uint64(ii*nblocks + jj + 1)
val := binary.BigEndian.Uint64(block[:8]) ^ t
binary.BigEndian.PutUint64(block[:8], val)
// - R[i] = LSB(64, B)
copy(intermediate[jj*8:jj*8+8], block[8:])
}
}
// 3) Output results.
// - Set C[0] = A
// - For i = 1 to n
// - C[i] = R[i]
return append(block[:8], intermediate...), nil
}
// Unwrap a key using the RFC 3394 AES Key Wrap Algorithm.
func Unwrap(key, cipherText []byte) ([]byte, error) {
if len(cipherText)%8 != 0 {
return nil, ErrUnwrapCiphertext
}
c, err := aes.NewCipher(key)
if err != nil {
return nil, ErrInvalidKey
}
nblocks := len(cipherText)/8 - 1
// 1) Initialize variables.
var block [aes.BlockSize]byte
// - Set A = C[0]
copy(block[:8], cipherText[:8])
// - For i = 1 to n
// - Set R[i] = C[i]
intermediate := make([]byte, len(cipherText)-8)
copy(intermediate, cipherText[8:])
// 2) Compute intermediate values.
for jj := 5; jj >= 0; jj-- {
for ii := nblocks - 1; ii >= 0; ii-- {
// - B = AES-1(K, (A ^ t) | R[i]) where t = n*j+1
// - A = MSB(64, B)
t := uint64(jj*nblocks + ii + 1)
val := binary.BigEndian.Uint64(block[:8]) ^ t
binary.BigEndian.PutUint64(block[:8], val)
copy(block[8:], intermediate[ii*8:ii*8+8])
c.Decrypt(block[:], block[:])
// - R[i] = LSB(B, 64)
copy(intermediate[ii*8:ii*8+8], block[8:])
}
}
// 3) Output results.
// - If A is an appropriate initial value (see 2.2.3),
for ii := 0; ii < 8; ii++ {
if block[ii] != 0xA6 {
return nil, ErrUnwrapFailed
}
}
// - For i = 1 to n
// - P[i] = R[i]
return intermediate, nil
}

224
vendor/github.com/ProtonMail/go-crypto/openpgp/armor/armor.go generated vendored Normal file
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@@ -0,0 +1,224 @@
// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package armor implements OpenPGP ASCII Armor, see RFC 4880. OpenPGP Armor is
// very similar to PEM except that it has an additional CRC checksum.
package armor // import "github.com/ProtonMail/go-crypto/openpgp/armor"
import (
"bufio"
"bytes"
"encoding/base64"
"github.com/ProtonMail/go-crypto/openpgp/errors"
"io"
)
// A Block represents an OpenPGP armored structure.
//
// The encoded form is:
// -----BEGIN Type-----
// Headers
//
// base64-encoded Bytes
// '=' base64 encoded checksum
// -----END Type-----
// where Headers is a possibly empty sequence of Key: Value lines.
//
// Since the armored data can be very large, this package presents a streaming
// interface.
type Block struct {
Type string // The type, taken from the preamble (i.e. "PGP SIGNATURE").
Header map[string]string // Optional headers.
Body io.Reader // A Reader from which the contents can be read
lReader lineReader
oReader openpgpReader
}
var ArmorCorrupt error = errors.StructuralError("armor invalid")
const crc24Init = 0xb704ce
const crc24Poly = 0x1864cfb
const crc24Mask = 0xffffff
// crc24 calculates the OpenPGP checksum as specified in RFC 4880, section 6.1
func crc24(crc uint32, d []byte) uint32 {
for _, b := range d {
crc ^= uint32(b) << 16
for i := 0; i < 8; i++ {
crc <<= 1
if crc&0x1000000 != 0 {
crc ^= crc24Poly
}
}
}
return crc
}
var armorStart = []byte("-----BEGIN ")
var armorEnd = []byte("-----END ")
var armorEndOfLine = []byte("-----")
// lineReader wraps a line based reader. It watches for the end of an armor
// block and records the expected CRC value.
type lineReader struct {
in *bufio.Reader
buf []byte
eof bool
crc uint32
crcSet bool
}
func (l *lineReader) Read(p []byte) (n int, err error) {
if l.eof {
return 0, io.EOF
}
if len(l.buf) > 0 {
n = copy(p, l.buf)
l.buf = l.buf[n:]
return
}
line, isPrefix, err := l.in.ReadLine()
if err != nil {
return
}
if isPrefix {
return 0, ArmorCorrupt
}
if bytes.HasPrefix(line, armorEnd) {
l.eof = true
return 0, io.EOF
}
if len(line) == 5 && line[0] == '=' {
// This is the checksum line
var expectedBytes [3]byte
var m int
m, err = base64.StdEncoding.Decode(expectedBytes[0:], line[1:])
if m != 3 || err != nil {
return
}
l.crc = uint32(expectedBytes[0])<<16 |
uint32(expectedBytes[1])<<8 |
uint32(expectedBytes[2])
line, _, err = l.in.ReadLine()
if err != nil && err != io.EOF {
return
}
if !bytes.HasPrefix(line, armorEnd) {
return 0, ArmorCorrupt
}
l.eof = true
l.crcSet = true
return 0, io.EOF
}
if len(line) > 96 {
return 0, ArmorCorrupt
}
n = copy(p, line)
bytesToSave := len(line) - n
if bytesToSave > 0 {
if cap(l.buf) < bytesToSave {
l.buf = make([]byte, 0, bytesToSave)
}
l.buf = l.buf[0:bytesToSave]
copy(l.buf, line[n:])
}
return
}
// openpgpReader passes Read calls to the underlying base64 decoder, but keeps
// a running CRC of the resulting data and checks the CRC against the value
// found by the lineReader at EOF.
type openpgpReader struct {
lReader *lineReader
b64Reader io.Reader
currentCRC uint32
}
func (r *openpgpReader) Read(p []byte) (n int, err error) {
n, err = r.b64Reader.Read(p)
r.currentCRC = crc24(r.currentCRC, p[:n])
if err == io.EOF && r.lReader.crcSet && r.lReader.crc != uint32(r.currentCRC&crc24Mask) {
return 0, ArmorCorrupt
}
return
}
// Decode reads a PGP armored block from the given Reader. It will ignore
// leading garbage. If it doesn't find a block, it will return nil, io.EOF. The
// given Reader is not usable after calling this function: an arbitrary amount
// of data may have been read past the end of the block.
func Decode(in io.Reader) (p *Block, err error) {
r := bufio.NewReaderSize(in, 100)
var line []byte
ignoreNext := false
TryNextBlock:
p = nil
// Skip leading garbage
for {
ignoreThis := ignoreNext
line, ignoreNext, err = r.ReadLine()
if err != nil {
return
}
if ignoreNext || ignoreThis {
continue
}
line = bytes.TrimSpace(line)
if len(line) > len(armorStart)+len(armorEndOfLine) && bytes.HasPrefix(line, armorStart) {
break
}
}
p = new(Block)
p.Type = string(line[len(armorStart) : len(line)-len(armorEndOfLine)])
p.Header = make(map[string]string)
nextIsContinuation := false
var lastKey string
// Read headers
for {
isContinuation := nextIsContinuation
line, nextIsContinuation, err = r.ReadLine()
if err != nil {
p = nil
return
}
if isContinuation {
p.Header[lastKey] += string(line)
continue
}
line = bytes.TrimSpace(line)
if len(line) == 0 {
break
}
i := bytes.Index(line, []byte(": "))
if i == -1 {
goto TryNextBlock
}
lastKey = string(line[:i])
p.Header[lastKey] = string(line[i+2:])
}
p.lReader.in = r
p.oReader.currentCRC = crc24Init
p.oReader.lReader = &p.lReader
p.oReader.b64Reader = base64.NewDecoder(base64.StdEncoding, &p.lReader)
p.Body = &p.oReader
return
}

160
vendor/github.com/ProtonMail/go-crypto/openpgp/armor/encode.go generated vendored Normal file
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// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package armor
import (
"encoding/base64"
"io"
)
var armorHeaderSep = []byte(": ")
var blockEnd = []byte("\n=")
var newline = []byte("\n")
var armorEndOfLineOut = []byte("-----\n")
// writeSlices writes its arguments to the given Writer.
func writeSlices(out io.Writer, slices ...[]byte) (err error) {
for _, s := range slices {
_, err = out.Write(s)
if err != nil {
return err
}
}
return
}
// lineBreaker breaks data across several lines, all of the same byte length
// (except possibly the last). Lines are broken with a single '\n'.
type lineBreaker struct {
lineLength int
line []byte
used int
out io.Writer
haveWritten bool
}
func newLineBreaker(out io.Writer, lineLength int) *lineBreaker {
return &lineBreaker{
lineLength: lineLength,
line: make([]byte, lineLength),
used: 0,
out: out,
}
}
func (l *lineBreaker) Write(b []byte) (n int, err error) {
n = len(b)
if n == 0 {
return
}
if l.used == 0 && l.haveWritten {
_, err = l.out.Write([]byte{'\n'})
if err != nil {
return
}
}
if l.used+len(b) < l.lineLength {
l.used += copy(l.line[l.used:], b)
return
}
l.haveWritten = true
_, err = l.out.Write(l.line[0:l.used])
if err != nil {
return
}
excess := l.lineLength - l.used
l.used = 0
_, err = l.out.Write(b[0:excess])
if err != nil {
return
}
_, err = l.Write(b[excess:])
return
}
func (l *lineBreaker) Close() (err error) {
if l.used > 0 {
_, err = l.out.Write(l.line[0:l.used])
if err != nil {
return
}
}
return
}
// encoding keeps track of a running CRC24 over the data which has been written
// to it and outputs a OpenPGP checksum when closed, followed by an armor
// trailer.
//
// It's built into a stack of io.Writers:
// encoding -> base64 encoder -> lineBreaker -> out
type encoding struct {
out io.Writer
breaker *lineBreaker
b64 io.WriteCloser
crc uint32
blockType []byte
}
func (e *encoding) Write(data []byte) (n int, err error) {
e.crc = crc24(e.crc, data)
return e.b64.Write(data)
}
func (e *encoding) Close() (err error) {
err = e.b64.Close()
if err != nil {
return
}
e.breaker.Close()
var checksumBytes [3]byte
checksumBytes[0] = byte(e.crc >> 16)
checksumBytes[1] = byte(e.crc >> 8)
checksumBytes[2] = byte(e.crc)
var b64ChecksumBytes [4]byte
base64.StdEncoding.Encode(b64ChecksumBytes[:], checksumBytes[:])
return writeSlices(e.out, blockEnd, b64ChecksumBytes[:], newline, armorEnd, e.blockType, armorEndOfLine)
}
// Encode returns a WriteCloser which will encode the data written to it in
// OpenPGP armor.
func Encode(out io.Writer, blockType string, headers map[string]string) (w io.WriteCloser, err error) {
bType := []byte(blockType)
err = writeSlices(out, armorStart, bType, armorEndOfLineOut)
if err != nil {
return
}
for k, v := range headers {
err = writeSlices(out, []byte(k), armorHeaderSep, []byte(v), newline)
if err != nil {
return
}
}
_, err = out.Write(newline)
if err != nil {
return
}
e := &encoding{
out: out,
breaker: newLineBreaker(out, 64),
crc: crc24Init,
blockType: bType,
}
e.b64 = base64.NewEncoder(base64.StdEncoding, e.breaker)
return e, nil
}

65
vendor/github.com/ProtonMail/go-crypto/openpgp/canonical_text.go generated vendored Normal file
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// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package openpgp
import (
"hash"
"io"
)
// NewCanonicalTextHash reformats text written to it into the canonical
// form and then applies the hash h. See RFC 4880, section 5.2.1.
func NewCanonicalTextHash(h hash.Hash) hash.Hash {
return &canonicalTextHash{h, 0}
}
type canonicalTextHash struct {
h hash.Hash
s int
}
var newline = []byte{'\r', '\n'}
func writeCanonical(cw io.Writer, buf []byte, s *int) (int, error) {
start := 0
for i, c := range buf {
switch *s {
case 0:
if c == '\r' {
*s = 1
} else if c == '\n' {
cw.Write(buf[start:i])
cw.Write(newline)
start = i + 1
}
case 1:
*s = 0
}
}
cw.Write(buf[start:])
return len(buf), nil
}
func (cth *canonicalTextHash) Write(buf []byte) (int, error) {
return writeCanonical(cth.h, buf, &cth.s)
}
func (cth *canonicalTextHash) Sum(in []byte) []byte {
return cth.h.Sum(in)
}
func (cth *canonicalTextHash) Reset() {
cth.h.Reset()
cth.s = 0
}
func (cth *canonicalTextHash) Size() int {
return cth.h.Size()
}
func (cth *canonicalTextHash) BlockSize() int {
return cth.h.BlockSize()
}

206
vendor/github.com/ProtonMail/go-crypto/openpgp/ecdh/ecdh.go generated vendored Normal file
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// Copyright 2017 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package ecdh implements ECDH encryption, suitable for OpenPGP,
// as specified in RFC 6637, section 8.
package ecdh
import (
"bytes"
"errors"
"io"
"github.com/ProtonMail/go-crypto/openpgp/aes/keywrap"
"github.com/ProtonMail/go-crypto/openpgp/internal/algorithm"
"github.com/ProtonMail/go-crypto/openpgp/internal/ecc"
)
type KDF struct {
Hash algorithm.Hash
Cipher algorithm.Cipher
}
type PublicKey struct {
curve ecc.ECDHCurve
Point []byte
KDF
}
type PrivateKey struct {
PublicKey
D []byte
}
func NewPublicKey(curve ecc.ECDHCurve, kdfHash algorithm.Hash, kdfCipher algorithm.Cipher) *PublicKey {
return &PublicKey{
curve: curve,
KDF: KDF{
Hash: kdfHash,
Cipher: kdfCipher,
},
}
}
func NewPrivateKey(key PublicKey) *PrivateKey {
return &PrivateKey{
PublicKey: key,
}
}
func (pk *PublicKey) GetCurve() ecc.ECDHCurve {
return pk.curve
}
func (pk *PublicKey) MarshalPoint() []byte {
return pk.curve.MarshalBytePoint(pk.Point)
}
func (pk *PublicKey) UnmarshalPoint(p []byte) error {
pk.Point = pk.curve.UnmarshalBytePoint(p)
if pk.Point == nil {
return errors.New("ecdh: failed to parse EC point")
}
return nil
}
func (sk *PrivateKey) MarshalByteSecret() []byte {
return sk.curve.MarshalByteSecret(sk.D)
}
func (sk *PrivateKey) UnmarshalByteSecret(d []byte) error {
sk.D = sk.curve.UnmarshalByteSecret(d)
if sk.D == nil {
return errors.New("ecdh: failed to parse scalar")
}
return nil
}
func GenerateKey(rand io.Reader, c ecc.ECDHCurve, kdf KDF) (priv *PrivateKey, err error) {
priv = new(PrivateKey)
priv.PublicKey.curve = c
priv.PublicKey.KDF = kdf
priv.PublicKey.Point, priv.D, err = c.GenerateECDH(rand)
return
}
func Encrypt(random io.Reader, pub *PublicKey, msg, curveOID, fingerprint []byte) (vsG, c []byte, err error) {
if len(msg) > 40 {
return nil, nil, errors.New("ecdh: message too long")
}
// the sender MAY use 21, 13, and 5 bytes of padding for AES-128,
// AES-192, and AES-256, respectively, to provide the same number of
// octets, 40 total, as an input to the key wrapping method.
padding := make([]byte, 40-len(msg))
for i := range padding {
padding[i] = byte(40 - len(msg))
}
m := append(msg, padding...)
ephemeral, zb, err := pub.curve.Encaps(random, pub.Point)
if err != nil {
return nil, nil, err
}
vsG = pub.curve.MarshalBytePoint(ephemeral)
z, err := buildKey(pub, zb, curveOID, fingerprint, false, false)
if err != nil {
return nil, nil, err
}
if c, err = keywrap.Wrap(z, m); err != nil {
return nil, nil, err
}
return vsG, c, nil
}
func Decrypt(priv *PrivateKey, vsG, c, curveOID, fingerprint []byte) (msg []byte, err error) {
var m []byte
zb, err := priv.PublicKey.curve.Decaps(priv.curve.UnmarshalBytePoint(vsG), priv.D)
// Try buildKey three times to workaround an old bug, see comments in buildKey.
for i := 0; i < 3; i++ {
var z []byte
// RFC6637 §8: "Compute Z = KDF( S, Z_len, Param );"
z, err = buildKey(&priv.PublicKey, zb, curveOID, fingerprint, i == 1, i == 2)
if err != nil {
return nil, err
}
// RFC6637 §8: "Compute C = AESKeyWrap( Z, c ) as per [RFC3394]"
m, err = keywrap.Unwrap(z, c)
if err == nil {
break
}
}
// Only return an error after we've tried all (required) variants of buildKey.
if err != nil {
return nil, err
}
// RFC6637 §8: "m = symm_alg_ID || session key || checksum || pkcs5_padding"
// The last byte should be the length of the padding, as per PKCS5; strip it off.
return m[:len(m)-int(m[len(m)-1])], nil
}
func buildKey(pub *PublicKey, zb []byte, curveOID, fingerprint []byte, stripLeading, stripTrailing bool) ([]byte, error) {
// Param = curve_OID_len || curve_OID || public_key_alg_ID || 03
// || 01 || KDF_hash_ID || KEK_alg_ID for AESKeyWrap
// || "Anonymous Sender " || recipient_fingerprint;
param := new(bytes.Buffer)
if _, err := param.Write(curveOID); err != nil {
return nil, err
}
algKDF := []byte{18, 3, 1, pub.KDF.Hash.Id(), pub.KDF.Cipher.Id()}
if _, err := param.Write(algKDF); err != nil {
return nil, err
}
if _, err := param.Write([]byte("Anonymous Sender ")); err != nil {
return nil, err
}
// For v5 keys, the 20 leftmost octets of the fingerprint are used.
if _, err := param.Write(fingerprint[:20]); err != nil {
return nil, err
}
if param.Len() - len(curveOID) != 45 {
return nil, errors.New("ecdh: malformed KDF Param")
}
// MB = Hash ( 00 || 00 || 00 || 01 || ZB || Param );
h := pub.KDF.Hash.New()
if _, err := h.Write([]byte{0x0, 0x0, 0x0, 0x1}); err != nil {
return nil, err
}
zbLen := len(zb)
i := 0
j := zbLen - 1
if stripLeading {
// Work around old go crypto bug where the leading zeros are missing.
for ; i < zbLen && zb[i] == 0; i++ {}
}
if stripTrailing {
// Work around old OpenPGP.js bug where insignificant trailing zeros in
// this little-endian number are missing.
// (See https://github.com/openpgpjs/openpgpjs/pull/853.)
for ; j >= 0 && zb[j] == 0; j-- {}
}
if _, err := h.Write(zb[i:j+1]); err != nil {
return nil, err
}
if _, err := h.Write(param.Bytes()); err != nil {
return nil, err
}
mb := h.Sum(nil)
return mb[:pub.KDF.Cipher.KeySize()], nil // return oBits leftmost bits of MB.
}
func Validate(priv *PrivateKey) error {
return priv.curve.ValidateECDH(priv.Point, priv.D)
}

80
vendor/github.com/ProtonMail/go-crypto/openpgp/ecdsa/ecdsa.go generated vendored Normal file
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// Package ecdsa implements ECDSA signature, suitable for OpenPGP,
// as specified in RFC 6637, section 5.
package ecdsa
import (
"errors"
"github.com/ProtonMail/go-crypto/openpgp/internal/ecc"
"io"
"math/big"
)
type PublicKey struct {
X, Y *big.Int
curve ecc.ECDSACurve
}
type PrivateKey struct {
PublicKey
D *big.Int
}
func NewPublicKey(curve ecc.ECDSACurve) *PublicKey {
return &PublicKey{
curve: curve,
}
}
func NewPrivateKey(key PublicKey) *PrivateKey {
return &PrivateKey{
PublicKey: key,
}
}
func (pk *PublicKey) GetCurve() ecc.ECDSACurve {
return pk.curve
}
func (pk *PublicKey) MarshalPoint() []byte {
return pk.curve.MarshalIntegerPoint(pk.X, pk.Y)
}
func (pk *PublicKey) UnmarshalPoint(p []byte) error {
pk.X, pk.Y = pk.curve.UnmarshalIntegerPoint(p)
if pk.X == nil {
return errors.New("ecdsa: failed to parse EC point")
}
return nil
}
func (sk *PrivateKey) MarshalIntegerSecret() []byte {
return sk.curve.MarshalIntegerSecret(sk.D)
}
func (sk *PrivateKey) UnmarshalIntegerSecret(d []byte) error {
sk.D = sk.curve.UnmarshalIntegerSecret(d)
if sk.D == nil {
return errors.New("ecdsa: failed to parse scalar")
}
return nil
}
func GenerateKey(rand io.Reader, c ecc.ECDSACurve) (priv *PrivateKey, err error) {
priv = new(PrivateKey)
priv.PublicKey.curve = c
priv.PublicKey.X, priv.PublicKey.Y, priv.D, err = c.GenerateECDSA(rand)
return
}
func Sign(rand io.Reader, priv *PrivateKey, hash []byte) (r, s *big.Int, err error) {
return priv.PublicKey.curve.Sign(rand, priv.X, priv.Y, priv.D, hash)
}
func Verify(pub *PublicKey, hash []byte, r, s *big.Int) bool {
return pub.curve.Verify(pub.X, pub.Y, hash, r, s)
}
func Validate(priv *PrivateKey) error {
return priv.curve.ValidateECDSA(priv.X, priv.Y, priv.D.Bytes())
}

91
vendor/github.com/ProtonMail/go-crypto/openpgp/eddsa/eddsa.go generated vendored Normal file
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// Package eddsa implements EdDSA signature, suitable for OpenPGP, as specified in
// https://datatracker.ietf.org/doc/html/draft-ietf-openpgp-crypto-refresh-06#section-13.7
package eddsa
import (
"errors"
"github.com/ProtonMail/go-crypto/openpgp/internal/ecc"
"io"
)
type PublicKey struct {
X []byte
curve ecc.EdDSACurve
}
type PrivateKey struct {
PublicKey
D []byte
}
func NewPublicKey(curve ecc.EdDSACurve) *PublicKey {
return &PublicKey{
curve: curve,
}
}
func NewPrivateKey(key PublicKey) *PrivateKey {
return &PrivateKey{
PublicKey: key,
}
}
func (pk *PublicKey) GetCurve() ecc.EdDSACurve {
return pk.curve
}
func (pk *PublicKey) MarshalPoint() []byte {
return pk.curve.MarshalBytePoint(pk.X)
}
func (pk *PublicKey) UnmarshalPoint(x []byte) error {
pk.X = pk.curve.UnmarshalBytePoint(x)
if pk.X == nil {
return errors.New("eddsa: failed to parse EC point")
}
return nil
}
func (sk *PrivateKey) MarshalByteSecret() []byte {
return sk.curve.MarshalByteSecret(sk.D)
}
func (sk *PrivateKey) UnmarshalByteSecret(d []byte) error {
sk.D = sk.curve.UnmarshalByteSecret(d)
if sk.D == nil {
return errors.New("eddsa: failed to parse scalar")
}
return nil
}
func GenerateKey(rand io.Reader, c ecc.EdDSACurve) (priv *PrivateKey, err error) {
priv = new(PrivateKey)
priv.PublicKey.curve = c
priv.PublicKey.X, priv.D, err = c.GenerateEdDSA(rand)
return
}
func Sign(priv *PrivateKey, message []byte) (r, s []byte, err error) {
sig, err := priv.PublicKey.curve.Sign(priv.PublicKey.X, priv.D, message)
if err != nil {
return nil, nil, err
}
r, s = priv.PublicKey.curve.MarshalSignature(sig)
return
}
func Verify(pub *PublicKey, message, r, s []byte) bool {
sig := pub.curve.UnmarshalSignature(r, s)
if sig == nil {
return false
}
return pub.curve.Verify(pub.X, message, sig)
}
func Validate(priv *PrivateKey) error {
return priv.curve.ValidateEdDSA(priv.PublicKey.X, priv.D)
}

124
vendor/github.com/ProtonMail/go-crypto/openpgp/elgamal/elgamal.go generated vendored Normal file
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// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package elgamal implements ElGamal encryption, suitable for OpenPGP,
// as specified in "A Public-Key Cryptosystem and a Signature Scheme Based on
// Discrete Logarithms," IEEE Transactions on Information Theory, v. IT-31,
// n. 4, 1985, pp. 469-472.
//
// This form of ElGamal embeds PKCS#1 v1.5 padding, which may make it
// unsuitable for other protocols. RSA should be used in preference in any
// case.
package elgamal // import "github.com/ProtonMail/go-crypto/openpgp/elgamal"
import (
"crypto/rand"
"crypto/subtle"
"errors"
"io"
"math/big"
)
// PublicKey represents an ElGamal public key.
type PublicKey struct {
G, P, Y *big.Int
}
// PrivateKey represents an ElGamal private key.
type PrivateKey struct {
PublicKey
X *big.Int
}
// Encrypt encrypts the given message to the given public key. The result is a
// pair of integers. Errors can result from reading random, or because msg is
// too large to be encrypted to the public key.
func Encrypt(random io.Reader, pub *PublicKey, msg []byte) (c1, c2 *big.Int, err error) {
pLen := (pub.P.BitLen() + 7) / 8
if len(msg) > pLen-11 {
err = errors.New("elgamal: message too long")
return
}
// EM = 0x02 || PS || 0x00 || M
em := make([]byte, pLen-1)
em[0] = 2
ps, mm := em[1:len(em)-len(msg)-1], em[len(em)-len(msg):]
err = nonZeroRandomBytes(ps, random)
if err != nil {
return
}
em[len(em)-len(msg)-1] = 0
copy(mm, msg)
m := new(big.Int).SetBytes(em)
k, err := rand.Int(random, pub.P)
if err != nil {
return
}
c1 = new(big.Int).Exp(pub.G, k, pub.P)
s := new(big.Int).Exp(pub.Y, k, pub.P)
c2 = s.Mul(s, m)
c2.Mod(c2, pub.P)
return
}
// Decrypt takes two integers, resulting from an ElGamal encryption, and
// returns the plaintext of the message. An error can result only if the
// ciphertext is invalid. Users should keep in mind that this is a padding
// oracle and thus, if exposed to an adaptive chosen ciphertext attack, can
// be used to break the cryptosystem. See ``Chosen Ciphertext Attacks
// Against Protocols Based on the RSA Encryption Standard PKCS #1'', Daniel
// Bleichenbacher, Advances in Cryptology (Crypto '98),
func Decrypt(priv *PrivateKey, c1, c2 *big.Int) (msg []byte, err error) {
s := new(big.Int).Exp(c1, priv.X, priv.P)
if s.ModInverse(s, priv.P) == nil {
return nil, errors.New("elgamal: invalid private key")
}
s.Mul(s, c2)
s.Mod(s, priv.P)
em := s.Bytes()
firstByteIsTwo := subtle.ConstantTimeByteEq(em[0], 2)
// The remainder of the plaintext must be a string of non-zero random
// octets, followed by a 0, followed by the message.
// lookingForIndex: 1 iff we are still looking for the zero.
// index: the offset of the first zero byte.
var lookingForIndex, index int
lookingForIndex = 1
for i := 1; i < len(em); i++ {
equals0 := subtle.ConstantTimeByteEq(em[i], 0)
index = subtle.ConstantTimeSelect(lookingForIndex&equals0, i, index)
lookingForIndex = subtle.ConstantTimeSelect(equals0, 0, lookingForIndex)
}
if firstByteIsTwo != 1 || lookingForIndex != 0 || index < 9 {
return nil, errors.New("elgamal: decryption error")
}
return em[index+1:], nil
}
// nonZeroRandomBytes fills the given slice with non-zero random octets.
func nonZeroRandomBytes(s []byte, rand io.Reader) (err error) {
_, err = io.ReadFull(rand, s)
if err != nil {
return
}
for i := 0; i < len(s); i++ {
for s[i] == 0 {
_, err = io.ReadFull(rand, s[i:i+1])
if err != nil {
return
}
}
}
return
}

116
vendor/github.com/ProtonMail/go-crypto/openpgp/errors/errors.go generated vendored Normal file
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// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package errors contains common error types for the OpenPGP packages.
package errors // import "github.com/ProtonMail/go-crypto/openpgp/errors"
import (
"strconv"
)
// A StructuralError is returned when OpenPGP data is found to be syntactically
// invalid.
type StructuralError string
func (s StructuralError) Error() string {
return "openpgp: invalid data: " + string(s)
}
// UnsupportedError indicates that, although the OpenPGP data is valid, it
// makes use of currently unimplemented features.
type UnsupportedError string
func (s UnsupportedError) Error() string {
return "openpgp: unsupported feature: " + string(s)
}
// InvalidArgumentError indicates that the caller is in error and passed an
// incorrect value.
type InvalidArgumentError string
func (i InvalidArgumentError) Error() string {
return "openpgp: invalid argument: " + string(i)
}
// SignatureError indicates that a syntactically valid signature failed to
// validate.
type SignatureError string
func (b SignatureError) Error() string {
return "openpgp: invalid signature: " + string(b)
}
var ErrMDCHashMismatch error = SignatureError("MDC hash mismatch")
var ErrMDCMissing error = SignatureError("MDC packet not found")
type signatureExpiredError int
func (se signatureExpiredError) Error() string {
return "openpgp: signature expired"
}
var ErrSignatureExpired error = signatureExpiredError(0)
type keyExpiredError int
func (ke keyExpiredError) Error() string {
return "openpgp: key expired"
}
var ErrKeyExpired error = keyExpiredError(0)
type keyIncorrectError int
func (ki keyIncorrectError) Error() string {
return "openpgp: incorrect key"
}
var ErrKeyIncorrect error = keyIncorrectError(0)
// KeyInvalidError indicates that the public key parameters are invalid
// as they do not match the private ones
type KeyInvalidError string
func (e KeyInvalidError) Error() string {
return "openpgp: invalid key: " + string(e)
}
type unknownIssuerError int
func (unknownIssuerError) Error() string {
return "openpgp: signature made by unknown entity"
}
var ErrUnknownIssuer error = unknownIssuerError(0)
type keyRevokedError int
func (keyRevokedError) Error() string {
return "openpgp: signature made by revoked key"
}
var ErrKeyRevoked error = keyRevokedError(0)
type UnknownPacketTypeError uint8
func (upte UnknownPacketTypeError) Error() string {
return "openpgp: unknown packet type: " + strconv.Itoa(int(upte))
}
// AEADError indicates that there is a problem when initializing or using a
// AEAD instance, configuration struct, nonces or index values.
type AEADError string
func (ae AEADError) Error() string {
return "openpgp: aead error: " + string(ae)
}
// ErrDummyPrivateKey results when operations are attempted on a private key
// that is just a dummy key. See
// https://git.gnupg.org/cgi-bin/gitweb.cgi?p=gnupg.git;a=blob;f=doc/DETAILS;h=fe55ae16ab4e26d8356dc574c9e8bc935e71aef1;hb=23191d7851eae2217ecdac6484349849a24fd94a#l1109
type ErrDummyPrivateKey string
func (dke ErrDummyPrivateKey) Error() string {
return "openpgp: s2k GNU dummy key: " + string(dke)
}

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vendor/github.com/ProtonMail/go-crypto/openpgp/internal/algorithm/aead.go generated vendored Normal file
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// Copyright (C) 2019 ProtonTech AG
package algorithm
import (
"crypto/cipher"
"github.com/ProtonMail/go-crypto/eax"
"github.com/ProtonMail/go-crypto/ocb"
)
// AEADMode defines the Authenticated Encryption with Associated Data mode of
// operation.
type AEADMode uint8
// Supported modes of operation (see RFC4880bis [EAX] and RFC7253)
const (
AEADModeEAX = AEADMode(1)
AEADModeOCB = AEADMode(2)
AEADModeGCM = AEADMode(100)
)
// TagLength returns the length in bytes of authentication tags.
func (mode AEADMode) TagLength() int {
switch mode {
case AEADModeEAX:
return 16
case AEADModeOCB:
return 16
case AEADModeGCM:
return 16
default:
return 0
}
}
// NonceLength returns the length in bytes of nonces.
func (mode AEADMode) NonceLength() int {
switch mode {
case AEADModeEAX:
return 16
case AEADModeOCB:
return 15
case AEADModeGCM:
return 12
default:
return 0
}
}
// New returns a fresh instance of the given mode
func (mode AEADMode) New(block cipher.Block) (alg cipher.AEAD) {
var err error
switch mode {
case AEADModeEAX:
alg, err = eax.NewEAX(block)
case AEADModeOCB:
alg, err = ocb.NewOCB(block)
case AEADModeGCM:
alg, err = cipher.NewGCM(block)
}
if err != nil {
panic(err.Error())
}
return alg
}

107
vendor/github.com/ProtonMail/go-crypto/openpgp/internal/algorithm/cipher.go generated vendored Normal file
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// Copyright 2017 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package algorithm
import (
"crypto/aes"
"crypto/cipher"
"crypto/des"
"golang.org/x/crypto/cast5"
)
// Cipher is an official symmetric key cipher algorithm. See RFC 4880,
// section 9.2.
type Cipher interface {
// Id returns the algorithm ID, as a byte, of the cipher.
Id() uint8
// KeySize returns the key size, in bytes, of the cipher.
KeySize() int
// BlockSize returns the block size, in bytes, of the cipher.
BlockSize() int
// New returns a fresh instance of the given cipher.
New(key []byte) cipher.Block
}
// The following constants mirror the OpenPGP standard (RFC 4880).
const (
TripleDES = CipherFunction(2)
CAST5 = CipherFunction(3)
AES128 = CipherFunction(7)
AES192 = CipherFunction(8)
AES256 = CipherFunction(9)
)
// CipherById represents the different block ciphers specified for OpenPGP. See
// http://www.iana.org/assignments/pgp-parameters/pgp-parameters.xhtml#pgp-parameters-13
var CipherById = map[uint8]Cipher{
TripleDES.Id(): TripleDES,
CAST5.Id(): CAST5,
AES128.Id(): AES128,
AES192.Id(): AES192,
AES256.Id(): AES256,
}
type CipherFunction uint8
// ID returns the algorithm Id, as a byte, of cipher.
func (sk CipherFunction) Id() uint8 {
return uint8(sk)
}
var keySizeByID = map[uint8]int{
TripleDES.Id(): 24,
CAST5.Id(): cast5.KeySize,
AES128.Id(): 16,
AES192.Id(): 24,
AES256.Id(): 32,
}
// KeySize returns the key size, in bytes, of cipher.
func (cipher CipherFunction) KeySize() int {
switch cipher {
case TripleDES:
return 24
case CAST5:
return cast5.KeySize
case AES128:
return 16
case AES192:
return 24
case AES256:
return 32
}
return 0
}
// BlockSize returns the block size, in bytes, of cipher.
func (cipher CipherFunction) BlockSize() int {
switch cipher {
case TripleDES:
return des.BlockSize
case CAST5:
return 8
case AES128, AES192, AES256:
return 16
}
return 0
}
// New returns a fresh instance of the given cipher.
func (cipher CipherFunction) New(key []byte) (block cipher.Block) {
var err error
switch cipher {
case TripleDES:
block, err = des.NewTripleDESCipher(key)
case CAST5:
block, err = cast5.NewCipher(key)
case AES128, AES192, AES256:
block, err = aes.NewCipher(key)
}
if err != nil {
panic(err.Error())
}
return
}

86
vendor/github.com/ProtonMail/go-crypto/openpgp/internal/algorithm/hash.go generated vendored Normal file
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// Copyright 2017 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package algorithm
import (
"crypto"
"fmt"
"hash"
)
// Hash is an official hash function algorithm. See RFC 4880, section 9.4.
type Hash interface {
// Id returns the algorithm ID, as a byte, of Hash.
Id() uint8
// Available reports whether the given hash function is linked into the binary.
Available() bool
// HashFunc simply returns the value of h so that Hash implements SignerOpts.
HashFunc() crypto.Hash
// New returns a new hash.Hash calculating the given hash function. New
// panics if the hash function is not linked into the binary.
New() hash.Hash
// Size returns the length, in bytes, of a digest resulting from the given
// hash function. It doesn't require that the hash function in question be
// linked into the program.
Size() int
// String is the name of the hash function corresponding to the given
// OpenPGP hash id.
String() string
}
// The following vars mirror the crypto/Hash supported hash functions.
var (
MD5 Hash = cryptoHash{1, crypto.MD5}
SHA1 Hash = cryptoHash{2, crypto.SHA1}
RIPEMD160 Hash = cryptoHash{3, crypto.RIPEMD160}
SHA256 Hash = cryptoHash{8, crypto.SHA256}
SHA384 Hash = cryptoHash{9, crypto.SHA384}
SHA512 Hash = cryptoHash{10, crypto.SHA512}
SHA224 Hash = cryptoHash{11, crypto.SHA224}
)
// HashById represents the different hash functions specified for OpenPGP. See
// http://www.iana.org/assignments/pgp-parameters/pgp-parameters.xhtml#pgp-parameters-14
var (
HashById = map[uint8]Hash{
MD5.Id(): MD5,
SHA1.Id(): SHA1,
RIPEMD160.Id(): RIPEMD160,
SHA256.Id(): SHA256,
SHA384.Id(): SHA384,
SHA512.Id(): SHA512,
SHA224.Id(): SHA224,
}
)
// cryptoHash contains pairs relating OpenPGP's hash identifier with
// Go's crypto.Hash type. See RFC 4880, section 9.4.
type cryptoHash struct {
id uint8
crypto.Hash
}
// Id returns the algorithm ID, as a byte, of cryptoHash.
func (h cryptoHash) Id() uint8 {
return h.id
}
var hashNames = map[uint8]string{
MD5.Id(): "MD5",
SHA1.Id(): "SHA1",
RIPEMD160.Id(): "RIPEMD160",
SHA256.Id(): "SHA256",
SHA384.Id(): "SHA384",
SHA512.Id(): "SHA512",
SHA224.Id(): "SHA224",
}
func (h cryptoHash) String() string {
s, ok := hashNames[h.id]
if !ok {
panic(fmt.Sprintf("Unsupported hash function %d", h.id))
}
return s
}

171
vendor/github.com/ProtonMail/go-crypto/openpgp/internal/ecc/curve25519.go generated vendored Normal file
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// Package ecc implements a generic interface for ECDH, ECDSA, and EdDSA.
package ecc
import (
"crypto/subtle"
"io"
"github.com/ProtonMail/go-crypto/openpgp/errors"
x25519lib "github.com/cloudflare/circl/dh/x25519"
)
type curve25519 struct {}
func NewCurve25519() *curve25519 {
return &curve25519{}
}
func (c *curve25519) GetCurveName() string {
return "curve25519"
}
// MarshalBytePoint encodes the public point from native format, adding the prefix.
// See https://datatracker.ietf.org/doc/html/draft-ietf-openpgp-crypto-refresh-06#section-5.5.5.6
func (c *curve25519) MarshalBytePoint(point [] byte) []byte {
return append([]byte{0x40}, point...)
}
// UnmarshalBytePoint decodes the public point to native format, removing the prefix.
// See https://datatracker.ietf.org/doc/html/draft-ietf-openpgp-crypto-refresh-06#section-5.5.5.6
func (c *curve25519) UnmarshalBytePoint(point []byte) []byte {
if len(point) != x25519lib.Size + 1 {
return nil
}
// Remove prefix
return point[1:]
}
// MarshalByteSecret encodes the secret scalar from native format.
// Note that the EC secret scalar differs from the definition of public keys in
// [Curve25519] in two ways: (1) the byte-ordering is big-endian, which is
// more uniform with how big integers are represented in OpenPGP, and (2) the
// leading zeros are truncated.
// See https://datatracker.ietf.org/doc/html/draft-ietf-openpgp-crypto-refresh-06#section-5.5.5.6.1.1
// Note that leading zero bytes are stripped later when encoding as an MPI.
func (c *curve25519) MarshalByteSecret(secret []byte) []byte {
d := make([]byte, x25519lib.Size)
copyReversed(d, secret)
// The following ensures that the private key is a number of the form
// 2^{254} + 8 * [0, 2^{251}), in order to avoid the small subgroup of
// the curve.
//
// This masking is done internally in the underlying lib and so is unnecessary
// for security, but OpenPGP implementations require that private keys be
// pre-masked.
d[0] &= 127
d[0] |= 64
d[31] &= 248
return d
}
// UnmarshalByteSecret decodes the secret scalar from native format.
// Note that the EC secret scalar differs from the definition of public keys in
// [Curve25519] in two ways: (1) the byte-ordering is big-endian, which is
// more uniform with how big integers are represented in OpenPGP, and (2) the
// leading zeros are truncated.
// See https://datatracker.ietf.org/doc/html/draft-ietf-openpgp-crypto-refresh-06#section-5.5.5.6.1.1
func (c *curve25519) UnmarshalByteSecret(d []byte) []byte {
if len(d) > x25519lib.Size {
return nil
}
// Ensure truncated leading bytes are re-added
secret := make([]byte, x25519lib.Size)
copyReversed(secret, d)
return secret
}
// generateKeyPairBytes Generates a private-public key-pair.
// 'priv' is a private key; a little-endian scalar belonging to the set
// 2^{254} + 8 * [0, 2^{251}), in order to avoid the small subgroup of the
// curve. 'pub' is simply 'priv' * G where G is the base point.
// See https://cr.yp.to/ecdh.html and RFC7748, sec 5.
func (c *curve25519) generateKeyPairBytes(rand io.Reader) (priv, pub x25519lib.Key, err error) {
_, err = io.ReadFull(rand, priv[:])
if err != nil {
return
}
x25519lib.KeyGen(&pub, &priv)
return
}
func (c *curve25519) GenerateECDH(rand io.Reader) (point []byte, secret []byte, err error) {
priv, pub, err := c.generateKeyPairBytes(rand)
if err != nil {
return
}
return pub[:], priv[:], nil
}
func (c *genericCurve) MaskSecret(secret []byte) []byte {
return secret
}
func (c *curve25519) Encaps(rand io.Reader, point []byte) (ephemeral, sharedSecret []byte, err error) {
// RFC6637 §8: "Generate an ephemeral key pair {v, V=vG}"
// ephemeralPrivate corresponds to `v`.
// ephemeralPublic corresponds to `V`.
ephemeralPrivate, ephemeralPublic, err := c.generateKeyPairBytes(rand)
if err != nil {
return nil, nil, err
}
// RFC6637 §8: "Obtain the authenticated recipient public key R"
// pubKey corresponds to `R`.
var pubKey x25519lib.Key
copy(pubKey[:], point)
// RFC6637 §8: "Compute the shared point S = vR"
// "VB = convert point V to the octet string"
// sharedPoint corresponds to `VB`.
var sharedPoint x25519lib.Key
x25519lib.Shared(&sharedPoint, &ephemeralPrivate, &pubKey)
return ephemeralPublic[:], sharedPoint[:], nil
}
func (c *curve25519) Decaps(vsG, secret []byte) (sharedSecret []byte, err error) {
var ephemeralPublic, decodedPrivate, sharedPoint x25519lib.Key
// RFC6637 §8: "The decryption is the inverse of the method given."
// All quoted descriptions in comments below describe encryption, and
// the reverse is performed.
// vsG corresponds to `VB` in RFC6637 §8 .
// RFC6637 §8: "VB = convert point V to the octet string"
copy(ephemeralPublic[:], vsG)
// decodedPrivate corresponds to `r` in RFC6637 §8 .
copy(decodedPrivate[:], secret)
// RFC6637 §8: "Note that the recipient obtains the shared secret by calculating
// S = rV = rvG, where (r,R) is the recipient's key pair."
// sharedPoint corresponds to `S`.
x25519lib.Shared(&sharedPoint, &decodedPrivate, &ephemeralPublic)
return sharedPoint[:], nil
}
func (c *curve25519) ValidateECDH(point []byte, secret []byte) (err error) {
var pk, sk x25519lib.Key
copy(sk[:], secret)
x25519lib.KeyGen(&pk, &sk)
if subtle.ConstantTimeCompare(point, pk[:]) == 0 {
return errors.KeyInvalidError("ecc: invalid curve25519 public point")
}
return nil
}
func copyReversed(out []byte, in []byte) {
l := len(in)
for i := 0; i < l; i++ {
out[i] = in[l-i-1]
}
}

140
vendor/github.com/ProtonMail/go-crypto/openpgp/internal/ecc/curve_info.go generated vendored Normal file
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// Package ecc implements a generic interface for ECDH, ECDSA, and EdDSA.
package ecc
import (
"bytes"
"crypto/elliptic"
"github.com/ProtonMail/go-crypto/bitcurves"
"github.com/ProtonMail/go-crypto/brainpool"
"github.com/ProtonMail/go-crypto/openpgp/internal/encoding"
)
type CurveInfo struct {
GenName string
Oid *encoding.OID
Curve Curve
}
var Curves = []CurveInfo{
{
// NIST P-256
GenName: "P256",
Oid: encoding.NewOID([]byte{0x2A, 0x86, 0x48, 0xCE, 0x3D, 0x03, 0x01, 0x07}),
Curve: NewGenericCurve(elliptic.P256()),
},
{
// NIST P-384
GenName: "P384",
Oid: encoding.NewOID([]byte{0x2B, 0x81, 0x04, 0x00, 0x22}),
Curve: NewGenericCurve(elliptic.P384()),
},
{
// NIST P-521
GenName: "P521",
Oid: encoding.NewOID([]byte{0x2B, 0x81, 0x04, 0x00, 0x23}),
Curve: NewGenericCurve(elliptic.P521()),
},
{
// SecP256k1
GenName: "SecP256k1",
Oid: encoding.NewOID([]byte{0x2B, 0x81, 0x04, 0x00, 0x0A}),
Curve: NewGenericCurve(bitcurves.S256()),
},
{
// Curve25519
GenName: "Curve25519",
Oid: encoding.NewOID([]byte{0x2B, 0x06, 0x01, 0x04, 0x01, 0x97, 0x55, 0x01, 0x05, 0x01}),
Curve: NewCurve25519(),
},
{
// X448
GenName: "Curve448",
Oid: encoding.NewOID([]byte{0x2B, 0x65, 0x6F}),
Curve: NewX448(),
},
{
// Ed25519
GenName: "Curve25519",
Oid: encoding.NewOID([]byte{0x2B, 0x06, 0x01, 0x04, 0x01, 0xDA, 0x47, 0x0F, 0x01}),
Curve: NewEd25519(),
},
{
// Ed448
GenName: "Curve448",
Oid: encoding.NewOID([]byte{0x2B, 0x65, 0x71}),
Curve: NewEd448(),
},
{
// BrainpoolP256r1
GenName: "BrainpoolP256",
Oid: encoding.NewOID([]byte{0x2B, 0x24, 0x03, 0x03, 0x02, 0x08, 0x01, 0x01, 0x07}),
Curve: NewGenericCurve(brainpool.P256r1()),
},
{
// BrainpoolP384r1
GenName: "BrainpoolP384",
Oid: encoding.NewOID([]byte{0x2B, 0x24, 0x03, 0x03, 0x02, 0x08, 0x01, 0x01, 0x0B}),
Curve: NewGenericCurve(brainpool.P384r1()),
},
{
// BrainpoolP512r1
GenName: "BrainpoolP512",
Oid: encoding.NewOID([]byte{0x2B, 0x24, 0x03, 0x03, 0x02, 0x08, 0x01, 0x01, 0x0D}),
Curve: NewGenericCurve(brainpool.P512r1()),
},
}
func FindByCurve(curve Curve) *CurveInfo {
for _, curveInfo := range Curves {
if curveInfo.Curve.GetCurveName() == curve.GetCurveName() {
return &curveInfo
}
}
return nil
}
func FindByOid(oid encoding.Field) *CurveInfo {
var rawBytes = oid.Bytes()
for _, curveInfo := range Curves {
if bytes.Equal(curveInfo.Oid.Bytes(), rawBytes) {
return &curveInfo
}
}
return nil
}
func FindEdDSAByGenName(curveGenName string) EdDSACurve {
for _, curveInfo := range Curves {
if curveInfo.GenName == curveGenName {
curve, ok := curveInfo.Curve.(EdDSACurve)
if ok {
return curve
}
}
}
return nil
}
func FindECDSAByGenName(curveGenName string) ECDSACurve {
for _, curveInfo := range Curves {
if curveInfo.GenName == curveGenName {
curve, ok := curveInfo.Curve.(ECDSACurve)
if ok {
return curve
}
}
}
return nil
}
func FindECDHByGenName(curveGenName string) ECDHCurve {
for _, curveInfo := range Curves {
if curveInfo.GenName == curveGenName {
curve, ok := curveInfo.Curve.(ECDHCurve)
if ok {
return curve
}
}
}
return nil
}

48
vendor/github.com/ProtonMail/go-crypto/openpgp/internal/ecc/curves.go generated vendored Normal file
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// Package ecc implements a generic interface for ECDH, ECDSA, and EdDSA.
package ecc
import (
"io"
"math/big"
)
type Curve interface {
GetCurveName() string
}
type ECDSACurve interface {
Curve
MarshalIntegerPoint(x, y *big.Int) []byte
UnmarshalIntegerPoint([]byte) (x, y *big.Int)
MarshalIntegerSecret(d *big.Int) []byte
UnmarshalIntegerSecret(d []byte) *big.Int
GenerateECDSA(rand io.Reader) (x, y, secret *big.Int, err error)
Sign(rand io.Reader, x, y, d *big.Int, hash []byte) (r, s *big.Int, err error)
Verify(x, y *big.Int, hash []byte, r, s *big.Int) bool
ValidateECDSA(x, y *big.Int, secret []byte) error
}
type EdDSACurve interface {
Curve
MarshalBytePoint(x []byte) []byte
UnmarshalBytePoint([]byte) (x []byte)
MarshalByteSecret(d []byte) []byte
UnmarshalByteSecret(d []byte) []byte
MarshalSignature(sig []byte) (r, s []byte)
UnmarshalSignature(r, s []byte) (sig []byte)
GenerateEdDSA(rand io.Reader) (pub, priv []byte, err error)
Sign(publicKey, privateKey, message []byte) (sig []byte, err error)
Verify(publicKey, message, sig []byte) bool
ValidateEdDSA(publicKey, privateKey []byte) (err error)
}
type ECDHCurve interface {
Curve
MarshalBytePoint([]byte) (encoded []byte)
UnmarshalBytePoint(encoded []byte) ([]byte)
MarshalByteSecret(d []byte) []byte
UnmarshalByteSecret(d []byte) []byte
GenerateECDH(rand io.Reader) (point []byte, secret []byte, err error)
Encaps(rand io.Reader, point []byte) (ephemeral, sharedSecret []byte, err error)
Decaps(ephemeral, secret []byte) (sharedSecret []byte, err error)
ValidateECDH(public []byte, secret []byte) error
}

111
vendor/github.com/ProtonMail/go-crypto/openpgp/internal/ecc/ed25519.go generated vendored Normal file
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// Package ecc implements a generic interface for ECDH, ECDSA, and EdDSA.
package ecc
import (
"crypto/subtle"
"io"
"github.com/ProtonMail/go-crypto/openpgp/errors"
ed25519lib "github.com/cloudflare/circl/sign/ed25519"
)
const ed25519Size = 32
type ed25519 struct {}
func NewEd25519() *ed25519 {
return &ed25519{}
}
func (c *ed25519) GetCurveName() string {
return "ed25519"
}
// MarshalBytePoint encodes the public point from native format, adding the prefix.
// See https://datatracker.ietf.org/doc/html/draft-ietf-openpgp-crypto-refresh-06#section-5.5.5.5
func (c *ed25519) MarshalBytePoint(x []byte) []byte {
return append([]byte{0x40}, x...)
}
// UnmarshalBytePoint decodes a point from prefixed format to native.
// See https://datatracker.ietf.org/doc/html/draft-ietf-openpgp-crypto-refresh-06#section-5.5.5.5
func (c *ed25519) UnmarshalBytePoint(point []byte) (x []byte) {
if len(point) != ed25519lib.PublicKeySize + 1 {
return nil
}
// Return unprefixed
return point[1:]
}
// MarshalByteSecret encodes a scalar in native format.
// See https://datatracker.ietf.org/doc/html/draft-ietf-openpgp-crypto-refresh-06#section-5.5.5.5
func (c *ed25519) MarshalByteSecret(d []byte) []byte {
return d
}
// UnmarshalByteSecret decodes a scalar in native format and re-adds the stripped leading zeroes
// See https://datatracker.ietf.org/doc/html/draft-ietf-openpgp-crypto-refresh-06#section-5.5.5.5
func (c *ed25519) UnmarshalByteSecret(s []byte) (d []byte) {
if len(s) > ed25519lib.SeedSize {
return nil
}
// Handle stripped leading zeroes
d = make([]byte, ed25519lib.SeedSize)
copy(d[ed25519lib.SeedSize - len(s):], s)
return
}
// MarshalSignature splits a signature in R and S.
// See https://datatracker.ietf.org/doc/html/draft-ietf-openpgp-crypto-refresh-06#section-5.2.3.3.1
func (c *ed25519) MarshalSignature(sig []byte) (r, s []byte) {
return sig[:ed25519Size], sig[ed25519Size:]
}
// UnmarshalSignature decodes R and S in the native format, re-adding the stripped leading zeroes
// See https://datatracker.ietf.org/doc/html/draft-ietf-openpgp-crypto-refresh-06#section-5.2.3.3.1
func (c *ed25519) UnmarshalSignature(r, s []byte) (sig []byte) {
// Check size
if len(r) > 32 || len(s) > 32 {
return nil
}
sig = make([]byte, ed25519lib.SignatureSize)
// Handle stripped leading zeroes
copy(sig[ed25519Size-len(r):ed25519Size], r)
copy(sig[ed25519lib.SignatureSize-len(s):], s)
return sig
}
func (c *ed25519) GenerateEdDSA(rand io.Reader) (pub, priv []byte, err error) {
pk, sk, err := ed25519lib.GenerateKey(rand)
if err != nil {
return nil, nil, err
}
return pk, sk[:ed25519lib.SeedSize], nil
}
func getEd25519Sk(publicKey, privateKey []byte) ed25519lib.PrivateKey {
return append(privateKey, publicKey...)
}
func (c *ed25519) Sign(publicKey, privateKey, message []byte) (sig []byte, err error) {
sig = ed25519lib.Sign(getEd25519Sk(publicKey, privateKey), message)
return sig, nil
}
func (c *ed25519) Verify(publicKey, message, sig []byte) bool {
return ed25519lib.Verify(publicKey, message, sig)
}
func (c *ed25519) ValidateEdDSA(publicKey, privateKey []byte) (err error) {
priv := getEd25519Sk(publicKey, privateKey)
expectedPriv := ed25519lib.NewKeyFromSeed(priv.Seed())
if subtle.ConstantTimeCompare(priv, expectedPriv) == 0 {
return errors.KeyInvalidError("ecc: invalid ed25519 secret")
}
return nil
}

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vendor/github.com/ProtonMail/go-crypto/openpgp/internal/ecc/ed448.go generated vendored Normal file
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// Package ecc implements a generic interface for ECDH, ECDSA, and EdDSA.
package ecc
import (
"crypto/subtle"
"io"
"github.com/ProtonMail/go-crypto/openpgp/errors"
ed448lib "github.com/cloudflare/circl/sign/ed448"
)
type ed448 struct {}
func NewEd448() *ed448 {
return &ed448{}
}
func (c *ed448) GetCurveName() string {
return "ed448"
}
// MarshalBytePoint encodes the public point from native format, adding the prefix.
// See https://datatracker.ietf.org/doc/html/draft-ietf-openpgp-crypto-refresh-06#section-5.5.5.5
func (c *ed448) MarshalBytePoint(x []byte) []byte {
// Return prefixed
return append([]byte{0x40}, x...)
}
// UnmarshalBytePoint decodes a point from prefixed format to native.
// See https://datatracker.ietf.org/doc/html/draft-ietf-openpgp-crypto-refresh-06#section-5.5.5.5
func (c *ed448) UnmarshalBytePoint(point []byte) (x []byte) {
if len(point) != ed448lib.PublicKeySize + 1 {
return nil
}
// Strip prefix
return point[1:]
}
// MarshalByteSecret encoded a scalar from native format to prefixed.
// See https://datatracker.ietf.org/doc/html/draft-ietf-openpgp-crypto-refresh-06#section-5.5.5.5
func (c *ed448) MarshalByteSecret(d []byte) []byte {
// Return prefixed
return append([]byte{0x40}, d...)
}
// UnmarshalByteSecret decodes a scalar from prefixed format to native.
// See https://datatracker.ietf.org/doc/html/draft-ietf-openpgp-crypto-refresh-06#section-5.5.5.5
func (c *ed448) UnmarshalByteSecret(s []byte) (d []byte) {
// Check prefixed size
if len(s) != ed448lib.SeedSize + 1 {
return nil
}
// Strip prefix
return s[1:]
}
// MarshalSignature splits a signature in R and S, where R is in prefixed native format and
// S is an MPI with value zero.
// See https://datatracker.ietf.org/doc/html/draft-ietf-openpgp-crypto-refresh-06#section-5.2.3.3.2
func (c *ed448) MarshalSignature(sig []byte) (r, s []byte) {
return append([]byte{0x40}, sig...), []byte{}
}
// UnmarshalSignature decodes R and S in the native format. Only R is used, in prefixed native format.
// See https://datatracker.ietf.org/doc/html/draft-ietf-openpgp-crypto-refresh-06#section-5.2.3.3.2
func (c *ed448) UnmarshalSignature(r, s []byte) (sig []byte) {
if len(r) != ed448lib.SignatureSize + 1 {
return nil
}
return r[1:]
}
func (c *ed448) GenerateEdDSA(rand io.Reader) (pub, priv []byte, err error) {
pk, sk, err := ed448lib.GenerateKey(rand)
if err != nil {
return nil, nil, err
}
return pk, sk[:ed448lib.SeedSize], nil
}
func getEd448Sk(publicKey, privateKey []byte) ed448lib.PrivateKey {
return append(privateKey, publicKey...)
}
func (c *ed448) Sign(publicKey, privateKey, message []byte) (sig []byte, err error) {
// Ed448 is used with the empty string as a context string.
// See https://datatracker.ietf.org/doc/html/draft-ietf-openpgp-crypto-refresh-06#section-13.7
sig = ed448lib.Sign(getEd448Sk(publicKey, privateKey), message, "")
return sig, nil
}
func (c *ed448) Verify(publicKey, message, sig []byte) bool {
// Ed448 is used with the empty string as a context string.
// See https://datatracker.ietf.org/doc/html/draft-ietf-openpgp-crypto-refresh-06#section-13.7
return ed448lib.Verify(publicKey, message, sig, "")
}
func (c *ed448) ValidateEdDSA(publicKey, privateKey []byte) (err error) {
priv := getEd448Sk(publicKey, privateKey)
expectedPriv := ed448lib.NewKeyFromSeed(priv.Seed())
if subtle.ConstantTimeCompare(priv, expectedPriv) == 0 {
return errors.KeyInvalidError("ecc: invalid ed448 secret")
}
return nil
}

149
vendor/github.com/ProtonMail/go-crypto/openpgp/internal/ecc/generic.go generated vendored Normal file
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// Package ecc implements a generic interface for ECDH, ECDSA, and EdDSA.
package ecc
import (
"crypto/ecdsa"
"crypto/elliptic"
"fmt"
"github.com/ProtonMail/go-crypto/openpgp/errors"
"io"
"math/big"
)
type genericCurve struct {
Curve elliptic.Curve
}
func NewGenericCurve(c elliptic.Curve) *genericCurve {
return &genericCurve{
Curve: c,
}
}
func (c *genericCurve) GetCurveName() string {
return c.Curve.Params().Name
}
func (c *genericCurve) MarshalBytePoint(point []byte) []byte {
return point
}
func (c *genericCurve) UnmarshalBytePoint(point []byte) []byte {
return point
}
func (c *genericCurve) MarshalIntegerPoint(x, y *big.Int) []byte {
return elliptic.Marshal(c.Curve, x, y)
}
func (c *genericCurve) UnmarshalIntegerPoint(point []byte) (x, y *big.Int) {
return elliptic.Unmarshal(c.Curve, point)
}
func (c *genericCurve) MarshalByteSecret(d []byte) []byte {
return d
}
func (c *genericCurve) UnmarshalByteSecret(d []byte) []byte {
return d
}
func (c *genericCurve) MarshalIntegerSecret(d *big.Int) []byte {
return d.Bytes()
}
func (c *genericCurve) UnmarshalIntegerSecret(d []byte) *big.Int {
return new(big.Int).SetBytes(d)
}
func (c *genericCurve) GenerateECDH(rand io.Reader) (point, secret []byte, err error) {
secret, x, y, err := elliptic.GenerateKey(c.Curve, rand)
if err != nil {
return nil, nil, err
}
point = elliptic.Marshal(c.Curve, x, y)
return point, secret, nil
}
func (c *genericCurve) GenerateECDSA(rand io.Reader) (x, y, secret *big.Int, err error) {
priv, err := ecdsa.GenerateKey(c.Curve, rand)
if err != nil {
return
}
return priv.X, priv.Y, priv.D, nil
}
func (c *genericCurve) Encaps(rand io.Reader, point []byte) (ephemeral, sharedSecret []byte, err error) {
xP, yP := elliptic.Unmarshal(c.Curve, point)
if xP == nil {
panic("invalid point")
}
d, x, y, err := elliptic.GenerateKey(c.Curve, rand)
if err != nil {
return nil, nil, err
}
vsG := elliptic.Marshal(c.Curve, x, y)
zbBig, _ := c.Curve.ScalarMult(xP, yP, d)
byteLen := (c.Curve.Params().BitSize + 7) >> 3
zb := make([]byte, byteLen)
zbBytes := zbBig.Bytes()
copy(zb[byteLen-len(zbBytes):], zbBytes)
return vsG, zb, nil
}
func (c *genericCurve) Decaps(ephemeral, secret []byte) (sharedSecret []byte, err error) {
x, y := elliptic.Unmarshal(c.Curve, ephemeral)
zbBig, _ := c.Curve.ScalarMult(x, y, secret)
byteLen := (c.Curve.Params().BitSize + 7) >> 3
zb := make([]byte, byteLen)
zbBytes := zbBig.Bytes()
copy(zb[byteLen-len(zbBytes):], zbBytes)
return zb, nil
}
func (c *genericCurve) Sign(rand io.Reader, x, y, d *big.Int, hash []byte) (r, s *big.Int, err error) {
priv := &ecdsa.PrivateKey{D: d, PublicKey: ecdsa.PublicKey{X: x, Y: y, Curve: c.Curve}}
return ecdsa.Sign(rand, priv, hash)
}
func (c *genericCurve) Verify(x, y *big.Int, hash []byte, r, s *big.Int) bool {
pub := &ecdsa.PublicKey{X: x, Y: y, Curve: c.Curve}
return ecdsa.Verify(pub, hash, r, s)
}
func (c *genericCurve) validate(xP, yP *big.Int, secret []byte) error {
// the public point should not be at infinity (0,0)
zero := new(big.Int)
if xP.Cmp(zero) == 0 && yP.Cmp(zero) == 0 {
return errors.KeyInvalidError(fmt.Sprintf("ecc (%s): infinity point", c.Curve.Params().Name))
}
// re-derive the public point Q' = (X,Y) = dG
// to compare to declared Q in public key
expectedX, expectedY := c.Curve.ScalarBaseMult(secret)
if xP.Cmp(expectedX) != 0 || yP.Cmp(expectedY) != 0 {
return errors.KeyInvalidError(fmt.Sprintf("ecc (%s): invalid point", c.Curve.Params().Name))
}
return nil
}
func (c *genericCurve) ValidateECDSA(xP, yP *big.Int, secret []byte) error {
return c.validate(xP, yP, secret)
}
func (c *genericCurve) ValidateECDH(point []byte, secret []byte) error {
xP, yP := elliptic.Unmarshal(c.Curve, point)
if xP == nil {
return errors.KeyInvalidError(fmt.Sprintf("ecc (%s): invalid point", c.Curve.Params().Name))
}
return c.validate(xP, yP, secret)
}

105
vendor/github.com/ProtonMail/go-crypto/openpgp/internal/ecc/x448.go generated vendored Normal file
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// Package ecc implements a generic interface for ECDH, ECDSA, and EdDSA.
package ecc
import (
"crypto/subtle"
"io"
"github.com/ProtonMail/go-crypto/openpgp/errors"
x448lib "github.com/cloudflare/circl/dh/x448"
)
type x448 struct {}
func NewX448() *x448 {
return &x448{}
}
func (c *x448) GetCurveName() string {
return "x448"
}
// MarshalBytePoint encodes the public point from native format, adding the prefix.
// See https://datatracker.ietf.org/doc/html/draft-ietf-openpgp-crypto-refresh-06#section-5.5.5.6
func (c *x448) MarshalBytePoint(point []byte) []byte {
return append([]byte{0x40}, point...)
}
// UnmarshalBytePoint decodes a point from prefixed format to native.
// See https://datatracker.ietf.org/doc/html/draft-ietf-openpgp-crypto-refresh-06#section-5.5.5.6
func (c *x448) UnmarshalBytePoint(point []byte) []byte {
if len(point) != x448lib.Size + 1 {
return nil
}
return point[1:]
}
// MarshalByteSecret encoded a scalar from native format to prefixed.
// See https://datatracker.ietf.org/doc/html/draft-ietf-openpgp-crypto-refresh-06#section-5.5.5.6.1.2
func (c *x448) MarshalByteSecret(d []byte) []byte {
return append([]byte{0x40}, d...)
}
// UnmarshalByteSecret decodes a scalar from prefixed format to native.
// See https://datatracker.ietf.org/doc/html/draft-ietf-openpgp-crypto-refresh-06#section-5.5.5.6.1.2
func (c *x448) UnmarshalByteSecret(d []byte) []byte {
if len(d) != x448lib.Size + 1 {
return nil
}
// Store without prefix
return d[1:]
}
func (c *x448) generateKeyPairBytes(rand io.Reader) (sk, pk x448lib.Key, err error) {
if _, err = rand.Read(sk[:]); err != nil {
return
}
x448lib.KeyGen(&pk, &sk)
return
}
func (c *x448) GenerateECDH(rand io.Reader) (point []byte, secret []byte, err error) {
priv, pub, err := c.generateKeyPairBytes(rand)
if err != nil {
return
}
return pub[:], priv[:], nil
}
func (c *x448) Encaps(rand io.Reader, point []byte) (ephemeral, sharedSecret []byte, err error) {
var pk, ss x448lib.Key
seed, e, err := c.generateKeyPairBytes(rand)
copy(pk[:], point)
x448lib.Shared(&ss, &seed, &pk)
return e[:], ss[:], nil
}
func (c *x448) Decaps(ephemeral, secret []byte) (sharedSecret []byte, err error) {
var ss, sk, e x448lib.Key
copy(sk[:], secret)
copy(e[:], ephemeral)
x448lib.Shared(&ss, &sk, &e)
return ss[:], nil
}
func (c *x448) ValidateECDH(point []byte, secret []byte) error {
var sk, pk, expectedPk x448lib.Key
copy(pk[:], point)
copy(sk[:], secret)
x448lib.KeyGen(&expectedPk, &sk)
if subtle.ConstantTimeCompare(expectedPk[:], pk[:]) == 0 {
return errors.KeyInvalidError("ecc: invalid curve25519 public point")
}
return nil
}

27
vendor/github.com/ProtonMail/go-crypto/openpgp/internal/encoding/encoding.go generated vendored Normal file
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// Copyright 2017 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package encoding implements openpgp packet field encodings as specified in
// RFC 4880 and 6637.
package encoding
import "io"
// Field is an encoded field of an openpgp packet.
type Field interface {
// Bytes returns the decoded data.
Bytes() []byte
// BitLength is the size in bits of the decoded data.
BitLength() uint16
// EncodedBytes returns the encoded data.
EncodedBytes() []byte
// EncodedLength is the size in bytes of the encoded data.
EncodedLength() uint16
// ReadFrom reads the next Field from r.
ReadFrom(r io.Reader) (int64, error)
}

91
vendor/github.com/ProtonMail/go-crypto/openpgp/internal/encoding/mpi.go generated vendored Normal file
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// Copyright 2017 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package encoding
import (
"io"
"math/big"
"math/bits"
)
// An MPI is used to store the contents of a big integer, along with the bit
// length that was specified in the original input. This allows the MPI to be
// reserialized exactly.
type MPI struct {
bytes []byte
bitLength uint16
}
// NewMPI returns a MPI initialized with bytes.
func NewMPI(bytes []byte) *MPI {
for len(bytes) != 0 && bytes[0] == 0 {
bytes = bytes[1:]
}
if len(bytes) == 0 {
bitLength := uint16(0)
return &MPI{bytes, bitLength}
}
bitLength := 8*uint16(len(bytes)-1) + uint16(bits.Len8(bytes[0]))
return &MPI{bytes, bitLength}
}
// Bytes returns the decoded data.
func (m *MPI) Bytes() []byte {
return m.bytes
}
// BitLength is the size in bits of the decoded data.
func (m *MPI) BitLength() uint16 {
return m.bitLength
}
// EncodedBytes returns the encoded data.
func (m *MPI) EncodedBytes() []byte {
return append([]byte{byte(m.bitLength >> 8), byte(m.bitLength)}, m.bytes...)
}
// EncodedLength is the size in bytes of the encoded data.
func (m *MPI) EncodedLength() uint16 {
return uint16(2 + len(m.bytes))
}
// ReadFrom reads into m the next MPI from r.
func (m *MPI) ReadFrom(r io.Reader) (int64, error) {
var buf [2]byte
n, err := io.ReadFull(r, buf[0:])
if err != nil {
if err == io.EOF {
err = io.ErrUnexpectedEOF
}
return int64(n), err
}
m.bitLength = uint16(buf[0])<<8 | uint16(buf[1])
m.bytes = make([]byte, (int(m.bitLength)+7)/8)
nn, err := io.ReadFull(r, m.bytes)
if err == io.EOF {
err = io.ErrUnexpectedEOF
}
// remove leading zero bytes from malformed GnuPG encoded MPIs:
// https://bugs.gnupg.org/gnupg/issue1853
// for _, b := range m.bytes {
// if b != 0 {
// break
// }
// m.bytes = m.bytes[1:]
// m.bitLength -= 8
// }
return int64(n) + int64(nn), err
}
// SetBig initializes m with the bits from n.
func (m *MPI) SetBig(n *big.Int) *MPI {
m.bytes = n.Bytes()
m.bitLength = uint16(n.BitLen())
return m
}

88
vendor/github.com/ProtonMail/go-crypto/openpgp/internal/encoding/oid.go generated vendored Normal file
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// Copyright 2017 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package encoding
import (
"io"
"github.com/ProtonMail/go-crypto/openpgp/errors"
)
// OID is used to store a variable-length field with a one-octet size
// prefix. See https://tools.ietf.org/html/rfc6637#section-9.
type OID struct {
bytes []byte
}
const (
// maxOID is the maximum number of bytes in a OID.
maxOID = 254
// reservedOIDLength1 and reservedOIDLength2 are OID lengths that the RFC
// specifies are reserved.
reservedOIDLength1 = 0
reservedOIDLength2 = 0xff
)
// NewOID returns a OID initialized with bytes.
func NewOID(bytes []byte) *OID {
switch len(bytes) {
case reservedOIDLength1, reservedOIDLength2:
panic("encoding: NewOID argument length is reserved")
default:
if len(bytes) > maxOID {
panic("encoding: NewOID argument too large")
}
}
return &OID{
bytes: bytes,
}
}
// Bytes returns the decoded data.
func (o *OID) Bytes() []byte {
return o.bytes
}
// BitLength is the size in bits of the decoded data.
func (o *OID) BitLength() uint16 {
return uint16(len(o.bytes) * 8)
}
// EncodedBytes returns the encoded data.
func (o *OID) EncodedBytes() []byte {
return append([]byte{byte(len(o.bytes))}, o.bytes...)
}
// EncodedLength is the size in bytes of the encoded data.
func (o *OID) EncodedLength() uint16 {
return uint16(1 + len(o.bytes))
}
// ReadFrom reads into b the next OID from r.
func (o *OID) ReadFrom(r io.Reader) (int64, error) {
var buf [1]byte
n, err := io.ReadFull(r, buf[:])
if err != nil {
if err == io.EOF {
err = io.ErrUnexpectedEOF
}
return int64(n), err
}
switch buf[0] {
case reservedOIDLength1, reservedOIDLength2:
return int64(n), errors.UnsupportedError("reserved for future extensions")
}
o.bytes = make([]byte, buf[0])
nn, err := io.ReadFull(r, o.bytes)
if err == io.EOF {
err = io.ErrUnexpectedEOF
}
return int64(n) + int64(nn), err
}

403
vendor/github.com/ProtonMail/go-crypto/openpgp/key_generation.go generated vendored Normal file
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// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package openpgp
import (
"crypto"
"crypto/rand"
"crypto/rsa"
goerrors "errors"
"io"
"math/big"
"time"
"github.com/ProtonMail/go-crypto/openpgp/ecdh"
"github.com/ProtonMail/go-crypto/openpgp/ecdsa"
"github.com/ProtonMail/go-crypto/openpgp/eddsa"
"github.com/ProtonMail/go-crypto/openpgp/errors"
"github.com/ProtonMail/go-crypto/openpgp/internal/algorithm"
"github.com/ProtonMail/go-crypto/openpgp/internal/ecc"
"github.com/ProtonMail/go-crypto/openpgp/packet"
)
// NewEntity returns an Entity that contains a fresh RSA/RSA keypair with a
// single identity composed of the given full name, comment and email, any of
// which may be empty but must not contain any of "()<>\x00".
// If config is nil, sensible defaults will be used.
func NewEntity(name, comment, email string, config *packet.Config) (*Entity, error) {
creationTime := config.Now()
keyLifetimeSecs := config.KeyLifetime()
// Generate a primary signing key
primaryPrivRaw, err := newSigner(config)
if err != nil {
return nil, err
}
primary := packet.NewSignerPrivateKey(creationTime, primaryPrivRaw)
if config != nil && config.V5Keys {
primary.UpgradeToV5()
}
e := &Entity{
PrimaryKey: &primary.PublicKey,
PrivateKey: primary,
Identities: make(map[string]*Identity),
Subkeys: []Subkey{},
}
err = e.addUserId(name, comment, email, config, creationTime, keyLifetimeSecs)
if err != nil {
return nil, err
}
// NOTE: No key expiry here, but we will not return this subkey in EncryptionKey()
// if the primary/master key has expired.
err = e.addEncryptionSubkey(config, creationTime, 0)
if err != nil {
return nil, err
}
return e, nil
}
func (t *Entity) AddUserId(name, comment, email string, config *packet.Config) error {
creationTime := config.Now()
keyLifetimeSecs := config.KeyLifetime()
return t.addUserId(name, comment, email, config, creationTime, keyLifetimeSecs)
}
func (t *Entity) addUserId(name, comment, email string, config *packet.Config, creationTime time.Time, keyLifetimeSecs uint32) error {
uid := packet.NewUserId(name, comment, email)
if uid == nil {
return errors.InvalidArgumentError("user id field contained invalid characters")
}
if _, ok := t.Identities[uid.Id]; ok {
return errors.InvalidArgumentError("user id exist")
}
primary := t.PrivateKey
isPrimaryId := len(t.Identities) == 0
selfSignature := &packet.Signature{
Version: primary.PublicKey.Version,
SigType: packet.SigTypePositiveCert,
PubKeyAlgo: primary.PublicKey.PubKeyAlgo,
Hash: config.Hash(),
CreationTime: creationTime,
KeyLifetimeSecs: &keyLifetimeSecs,
IssuerKeyId: &primary.PublicKey.KeyId,
IssuerFingerprint: primary.PublicKey.Fingerprint,
IsPrimaryId: &isPrimaryId,
FlagsValid: true,
FlagSign: true,
FlagCertify: true,
MDC: true, // true by default, see 5.8 vs. 5.14
AEAD: config.AEAD() != nil,
V5Keys: config != nil && config.V5Keys,
}
// Set the PreferredHash for the SelfSignature from the packet.Config.
// If it is not the must-implement algorithm from rfc4880bis, append that.
selfSignature.PreferredHash = []uint8{hashToHashId(config.Hash())}
if config.Hash() != crypto.SHA256 {
selfSignature.PreferredHash = append(selfSignature.PreferredHash, hashToHashId(crypto.SHA256))
}
// Likewise for DefaultCipher.
selfSignature.PreferredSymmetric = []uint8{uint8(config.Cipher())}
if config.Cipher() != packet.CipherAES128 {
selfSignature.PreferredSymmetric = append(selfSignature.PreferredSymmetric, uint8(packet.CipherAES128))
}
// We set CompressionNone as the preferred compression algorithm because
// of compression side channel attacks, then append the configured
// DefaultCompressionAlgo if any is set (to signal support for cases
// where the application knows that using compression is safe).
selfSignature.PreferredCompression = []uint8{uint8(packet.CompressionNone)}
if config.Compression() != packet.CompressionNone {
selfSignature.PreferredCompression = append(selfSignature.PreferredCompression, uint8(config.Compression()))
}
// And for DefaultMode.
selfSignature.PreferredAEAD = []uint8{uint8(config.AEAD().Mode())}
if config.AEAD().Mode() != packet.AEADModeEAX {
selfSignature.PreferredAEAD = append(selfSignature.PreferredAEAD, uint8(packet.AEADModeEAX))
}
// User ID binding signature
err := selfSignature.SignUserId(uid.Id, &primary.PublicKey, primary, config)
if err != nil {
return err
}
t.Identities[uid.Id] = &Identity{
Name: uid.Id,
UserId: uid,
SelfSignature: selfSignature,
Signatures: []*packet.Signature{selfSignature},
}
return nil
}
// AddSigningSubkey adds a signing keypair as a subkey to the Entity.
// If config is nil, sensible defaults will be used.
func (e *Entity) AddSigningSubkey(config *packet.Config) error {
creationTime := config.Now()
keyLifetimeSecs := config.KeyLifetime()
subPrivRaw, err := newSigner(config)
if err != nil {
return err
}
sub := packet.NewSignerPrivateKey(creationTime, subPrivRaw)
subkey := Subkey{
PublicKey: &sub.PublicKey,
PrivateKey: sub,
Sig: &packet.Signature{
Version: e.PrimaryKey.Version,
CreationTime: creationTime,
KeyLifetimeSecs: &keyLifetimeSecs,
SigType: packet.SigTypeSubkeyBinding,
PubKeyAlgo: e.PrimaryKey.PubKeyAlgo,
Hash: config.Hash(),
FlagsValid: true,
FlagSign: true,
IssuerKeyId: &e.PrimaryKey.KeyId,
EmbeddedSignature: &packet.Signature{
Version: e.PrimaryKey.Version,
CreationTime: creationTime,
SigType: packet.SigTypePrimaryKeyBinding,
PubKeyAlgo: sub.PublicKey.PubKeyAlgo,
Hash: config.Hash(),
IssuerKeyId: &e.PrimaryKey.KeyId,
},
},
}
if config != nil && config.V5Keys {
subkey.PublicKey.UpgradeToV5()
}
err = subkey.Sig.EmbeddedSignature.CrossSignKey(subkey.PublicKey, e.PrimaryKey, subkey.PrivateKey, config)
if err != nil {
return err
}
subkey.PublicKey.IsSubkey = true
subkey.PrivateKey.IsSubkey = true
if err = subkey.Sig.SignKey(subkey.PublicKey, e.PrivateKey, config); err != nil {
return err
}
e.Subkeys = append(e.Subkeys, subkey)
return nil
}
// AddEncryptionSubkey adds an encryption keypair as a subkey to the Entity.
// If config is nil, sensible defaults will be used.
func (e *Entity) AddEncryptionSubkey(config *packet.Config) error {
creationTime := config.Now()
keyLifetimeSecs := config.KeyLifetime()
return e.addEncryptionSubkey(config, creationTime, keyLifetimeSecs)
}
func (e *Entity) addEncryptionSubkey(config *packet.Config, creationTime time.Time, keyLifetimeSecs uint32) error {
subPrivRaw, err := newDecrypter(config)
if err != nil {
return err
}
sub := packet.NewDecrypterPrivateKey(creationTime, subPrivRaw)
subkey := Subkey{
PublicKey: &sub.PublicKey,
PrivateKey: sub,
Sig: &packet.Signature{
Version: e.PrimaryKey.Version,
CreationTime: creationTime,
KeyLifetimeSecs: &keyLifetimeSecs,
SigType: packet.SigTypeSubkeyBinding,
PubKeyAlgo: e.PrimaryKey.PubKeyAlgo,
Hash: config.Hash(),
FlagsValid: true,
FlagEncryptStorage: true,
FlagEncryptCommunications: true,
IssuerKeyId: &e.PrimaryKey.KeyId,
},
}
if config != nil && config.V5Keys {
subkey.PublicKey.UpgradeToV5()
}
subkey.PublicKey.IsSubkey = true
subkey.PrivateKey.IsSubkey = true
if err = subkey.Sig.SignKey(subkey.PublicKey, e.PrivateKey, config); err != nil {
return err
}
e.Subkeys = append(e.Subkeys, subkey)
return nil
}
// Generates a signing key
func newSigner(config *packet.Config) (signer interface{}, err error) {
switch config.PublicKeyAlgorithm() {
case packet.PubKeyAlgoRSA:
bits := config.RSAModulusBits()
if bits < 1024 {
return nil, errors.InvalidArgumentError("bits must be >= 1024")
}
if config != nil && len(config.RSAPrimes) >= 2 {
primes := config.RSAPrimes[0:2]
config.RSAPrimes = config.RSAPrimes[2:]
return generateRSAKeyWithPrimes(config.Random(), 2, bits, primes)
}
return rsa.GenerateKey(config.Random(), bits)
case packet.PubKeyAlgoEdDSA:
curve := ecc.FindEdDSAByGenName(string(config.CurveName()))
if curve == nil {
return nil, errors.InvalidArgumentError("unsupported curve")
}
priv, err := eddsa.GenerateKey(config.Random(), curve)
if err != nil {
return nil, err
}
return priv, nil
case packet.PubKeyAlgoECDSA:
curve := ecc.FindECDSAByGenName(string(config.CurveName()))
if curve == nil {
return nil, errors.InvalidArgumentError("unsupported curve")
}
priv, err := ecdsa.GenerateKey(config.Random(), curve)
if err != nil {
return nil, err
}
return priv, nil
default:
return nil, errors.InvalidArgumentError("unsupported public key algorithm")
}
}
// Generates an encryption/decryption key
func newDecrypter(config *packet.Config) (decrypter interface{}, err error) {
switch config.PublicKeyAlgorithm() {
case packet.PubKeyAlgoRSA:
bits := config.RSAModulusBits()
if bits < 1024 {
return nil, errors.InvalidArgumentError("bits must be >= 1024")
}
if config != nil && len(config.RSAPrimes) >= 2 {
primes := config.RSAPrimes[0:2]
config.RSAPrimes = config.RSAPrimes[2:]
return generateRSAKeyWithPrimes(config.Random(), 2, bits, primes)
}
return rsa.GenerateKey(config.Random(), bits)
case packet.PubKeyAlgoEdDSA, packet.PubKeyAlgoECDSA:
fallthrough // When passing EdDSA or ECDSA, we generate an ECDH subkey
case packet.PubKeyAlgoECDH:
var kdf = ecdh.KDF{
Hash: algorithm.SHA512,
Cipher: algorithm.AES256,
}
curve := ecc.FindECDHByGenName(string(config.CurveName()))
if curve == nil {
return nil, errors.InvalidArgumentError("unsupported curve")
}
return ecdh.GenerateKey(config.Random(), curve, kdf)
default:
return nil, errors.InvalidArgumentError("unsupported public key algorithm")
}
}
var bigOne = big.NewInt(1)
// generateRSAKeyWithPrimes generates a multi-prime RSA keypair of the
// given bit size, using the given random source and prepopulated primes.
func generateRSAKeyWithPrimes(random io.Reader, nprimes int, bits int, prepopulatedPrimes []*big.Int) (*rsa.PrivateKey, error) {
priv := new(rsa.PrivateKey)
priv.E = 65537
if nprimes < 2 {
return nil, goerrors.New("generateRSAKeyWithPrimes: nprimes must be >= 2")
}
if bits < 1024 {
return nil, goerrors.New("generateRSAKeyWithPrimes: bits must be >= 1024")
}
primes := make([]*big.Int, nprimes)
NextSetOfPrimes:
for {
todo := bits
// crypto/rand should set the top two bits in each prime.
// Thus each prime has the form
// p_i = 2^bitlen(p_i) × 0.11... (in base 2).
// And the product is:
// P = 2^todo × α
// where α is the product of nprimes numbers of the form 0.11...
//
// If α < 1/2 (which can happen for nprimes > 2), we need to
// shift todo to compensate for lost bits: the mean value of 0.11...
// is 7/8, so todo + shift - nprimes * log2(7/8) ~= bits - 1/2
// will give good results.
if nprimes >= 7 {
todo += (nprimes - 2) / 5
}
for i := 0; i < nprimes; i++ {
var err error
if len(prepopulatedPrimes) == 0 {
primes[i], err = rand.Prime(random, todo/(nprimes-i))
if err != nil {
return nil, err
}
} else {
primes[i] = prepopulatedPrimes[0]
prepopulatedPrimes = prepopulatedPrimes[1:]
}
todo -= primes[i].BitLen()
}
// Make sure that primes is pairwise unequal.
for i, prime := range primes {
for j := 0; j < i; j++ {
if prime.Cmp(primes[j]) == 0 {
continue NextSetOfPrimes
}
}
}
n := new(big.Int).Set(bigOne)
totient := new(big.Int).Set(bigOne)
pminus1 := new(big.Int)
for _, prime := range primes {
n.Mul(n, prime)
pminus1.Sub(prime, bigOne)
totient.Mul(totient, pminus1)
}
if n.BitLen() != bits {
// This should never happen for nprimes == 2 because
// crypto/rand should set the top two bits in each prime.
// For nprimes > 2 we hope it does not happen often.
continue NextSetOfPrimes
}
priv.D = new(big.Int)
e := big.NewInt(int64(priv.E))
ok := priv.D.ModInverse(e, totient)
if ok != nil {
priv.Primes = primes
priv.N = n
break
}
}
priv.Precompute()
return priv, nil
}

829
vendor/github.com/ProtonMail/go-crypto/openpgp/keys.go generated vendored Normal file
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@@ -0,0 +1,829 @@
// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package openpgp
import (
goerrors "errors"
"io"
"time"
"github.com/ProtonMail/go-crypto/openpgp/armor"
"github.com/ProtonMail/go-crypto/openpgp/errors"
"github.com/ProtonMail/go-crypto/openpgp/packet"
)
// PublicKeyType is the armor type for a PGP public key.
var PublicKeyType = "PGP PUBLIC KEY BLOCK"
// PrivateKeyType is the armor type for a PGP private key.
var PrivateKeyType = "PGP PRIVATE KEY BLOCK"
// An Entity represents the components of an OpenPGP key: a primary public key
// (which must be a signing key), one or more identities claimed by that key,
// and zero or more subkeys, which may be encryption keys.
type Entity struct {
PrimaryKey *packet.PublicKey
PrivateKey *packet.PrivateKey
Identities map[string]*Identity // indexed by Identity.Name
Revocations []*packet.Signature
Subkeys []Subkey
}
// An Identity represents an identity claimed by an Entity and zero or more
// assertions by other entities about that claim.
type Identity struct {
Name string // by convention, has the form "Full Name (comment) <email@example.com>"
UserId *packet.UserId
SelfSignature *packet.Signature
Revocations []*packet.Signature
Signatures []*packet.Signature // all (potentially unverified) self-signatures, revocations, and third-party signatures
}
// A Subkey is an additional public key in an Entity. Subkeys can be used for
// encryption.
type Subkey struct {
PublicKey *packet.PublicKey
PrivateKey *packet.PrivateKey
Sig *packet.Signature
Revocations []*packet.Signature
}
// A Key identifies a specific public key in an Entity. This is either the
// Entity's primary key or a subkey.
type Key struct {
Entity *Entity
PublicKey *packet.PublicKey
PrivateKey *packet.PrivateKey
SelfSignature *packet.Signature
Revocations []*packet.Signature
}
// A KeyRing provides access to public and private keys.
type KeyRing interface {
// KeysById returns the set of keys that have the given key id.
KeysById(id uint64) []Key
// KeysByIdAndUsage returns the set of keys with the given id
// that also meet the key usage given by requiredUsage.
// The requiredUsage is expressed as the bitwise-OR of
// packet.KeyFlag* values.
KeysByIdUsage(id uint64, requiredUsage byte) []Key
// DecryptionKeys returns all private keys that are valid for
// decryption.
DecryptionKeys() []Key
}
// PrimaryIdentity returns an Identity, preferring non-revoked identities,
// identities marked as primary, or the latest-created identity, in that order.
func (e *Entity) PrimaryIdentity() *Identity {
var primaryIdentity *Identity
for _, ident := range e.Identities {
if shouldPreferIdentity(primaryIdentity, ident) {
primaryIdentity = ident
}
}
return primaryIdentity
}
func shouldPreferIdentity(existingId, potentialNewId *Identity) bool {
if existingId == nil {
return true
}
if len(existingId.Revocations) > len(potentialNewId.Revocations) {
return true
}
if len(existingId.Revocations) < len(potentialNewId.Revocations) {
return false
}
if existingId.SelfSignature == nil {
return true
}
if existingId.SelfSignature.IsPrimaryId != nil && *existingId.SelfSignature.IsPrimaryId &&
!(potentialNewId.SelfSignature.IsPrimaryId != nil && *potentialNewId.SelfSignature.IsPrimaryId) {
return false
}
if !(existingId.SelfSignature.IsPrimaryId != nil && *existingId.SelfSignature.IsPrimaryId) &&
potentialNewId.SelfSignature.IsPrimaryId != nil && *potentialNewId.SelfSignature.IsPrimaryId {
return true
}
return potentialNewId.SelfSignature.CreationTime.After(existingId.SelfSignature.CreationTime)
}
// EncryptionKey returns the best candidate Key for encrypting a message to the
// given Entity.
func (e *Entity) EncryptionKey(now time.Time) (Key, bool) {
// Fail to find any encryption key if the...
i := e.PrimaryIdentity()
if e.PrimaryKey.KeyExpired(i.SelfSignature, now) || // primary key has expired
i.SelfSignature == nil || // user ID has no self-signature
i.SelfSignature.SigExpired(now) || // user ID self-signature has expired
e.Revoked(now) || // primary key has been revoked
i.Revoked(now) { // user ID has been revoked
return Key{}, false
}
// Iterate the keys to find the newest, unexpired one
candidateSubkey := -1
var maxTime time.Time
for i, subkey := range e.Subkeys {
if subkey.Sig.FlagsValid &&
subkey.Sig.FlagEncryptCommunications &&
subkey.PublicKey.PubKeyAlgo.CanEncrypt() &&
!subkey.PublicKey.KeyExpired(subkey.Sig, now) &&
!subkey.Sig.SigExpired(now) &&
!subkey.Revoked(now) &&
(maxTime.IsZero() || subkey.Sig.CreationTime.After(maxTime)) {
candidateSubkey = i
maxTime = subkey.Sig.CreationTime
}
}
if candidateSubkey != -1 {
subkey := e.Subkeys[candidateSubkey]
return Key{e, subkey.PublicKey, subkey.PrivateKey, subkey.Sig, subkey.Revocations}, true
}
// If we don't have any candidate subkeys for encryption and
// the primary key doesn't have any usage metadata then we
// assume that the primary key is ok. Or, if the primary key is
// marked as ok to encrypt with, then we can obviously use it.
if !i.SelfSignature.FlagsValid || i.SelfSignature.FlagEncryptCommunications &&
e.PrimaryKey.PubKeyAlgo.CanEncrypt() {
return Key{e, e.PrimaryKey, e.PrivateKey, i.SelfSignature, e.Revocations}, true
}
return Key{}, false
}
// CertificationKey return the best candidate Key for certifying a key with this
// Entity.
func (e *Entity) CertificationKey(now time.Time) (Key, bool) {
return e.CertificationKeyById(now, 0)
}
// CertificationKeyById return the Key for key certification with this
// Entity and keyID.
func (e *Entity) CertificationKeyById(now time.Time, id uint64) (Key, bool) {
return e.signingKeyByIdUsage(now, id, packet.KeyFlagCertify)
}
// SigningKey return the best candidate Key for signing a message with this
// Entity.
func (e *Entity) SigningKey(now time.Time) (Key, bool) {
return e.SigningKeyById(now, 0)
}
// SigningKeyById return the Key for signing a message with this
// Entity and keyID.
func (e *Entity) SigningKeyById(now time.Time, id uint64) (Key, bool) {
return e.signingKeyByIdUsage(now, id, packet.KeyFlagSign)
}
func (e *Entity) signingKeyByIdUsage(now time.Time, id uint64, flags int) (Key, bool) {
// Fail to find any signing key if the...
i := e.PrimaryIdentity()
if e.PrimaryKey.KeyExpired(i.SelfSignature, now) || // primary key has expired
i.SelfSignature == nil || // user ID has no self-signature
i.SelfSignature.SigExpired(now) || // user ID self-signature has expired
e.Revoked(now) || // primary key has been revoked
i.Revoked(now) { // user ID has been revoked
return Key{}, false
}
// Iterate the keys to find the newest, unexpired one
candidateSubkey := -1
var maxTime time.Time
for idx, subkey := range e.Subkeys {
if subkey.Sig.FlagsValid &&
(flags & packet.KeyFlagCertify == 0 || subkey.Sig.FlagCertify) &&
(flags & packet.KeyFlagSign == 0 || subkey.Sig.FlagSign) &&
subkey.PublicKey.PubKeyAlgo.CanSign() &&
!subkey.PublicKey.KeyExpired(subkey.Sig, now) &&
!subkey.Sig.SigExpired(now) &&
!subkey.Revoked(now) &&
(maxTime.IsZero() || subkey.Sig.CreationTime.After(maxTime)) &&
(id == 0 || subkey.PublicKey.KeyId == id) {
candidateSubkey = idx
maxTime = subkey.Sig.CreationTime
}
}
if candidateSubkey != -1 {
subkey := e.Subkeys[candidateSubkey]
return Key{e, subkey.PublicKey, subkey.PrivateKey, subkey.Sig, subkey.Revocations}, true
}
// If we have no candidate subkey then we assume that it's ok to sign
// with the primary key. Or, if the primary key is marked as ok to
// sign with, then we can use it.
if !i.SelfSignature.FlagsValid || (
(flags & packet.KeyFlagCertify == 0 || i.SelfSignature.FlagCertify) &&
(flags & packet.KeyFlagSign == 0 || i.SelfSignature.FlagSign)) &&
e.PrimaryKey.PubKeyAlgo.CanSign() &&
(id == 0 || e.PrimaryKey.KeyId == id) {
return Key{e, e.PrimaryKey, e.PrivateKey, i.SelfSignature, e.Revocations}, true
}
// No keys with a valid Signing Flag or no keys matched the id passed in
return Key{}, false
}
func revoked(revocations []*packet.Signature, now time.Time) bool {
for _, revocation := range revocations {
if revocation.RevocationReason != nil && *revocation.RevocationReason == packet.KeyCompromised {
// If the key is compromised, the key is considered revoked even before the revocation date.
return true
}
if !revocation.SigExpired(now) {
return true
}
}
return false
}
// Revoked returns whether the entity has any direct key revocation signatures.
// Note that third-party revocation signatures are not supported.
// Note also that Identity and Subkey revocation should be checked separately.
func (e *Entity) Revoked(now time.Time) bool {
return revoked(e.Revocations, now)
}
// Revoked returns whether the identity has been revoked by a self-signature.
// Note that third-party revocation signatures are not supported.
func (i *Identity) Revoked(now time.Time) bool {
return revoked(i.Revocations, now)
}
// Revoked returns whether the subkey has been revoked by a self-signature.
// Note that third-party revocation signatures are not supported.
func (s *Subkey) Revoked(now time.Time) bool {
return revoked(s.Revocations, now)
}
// Revoked returns whether the key or subkey has been revoked by a self-signature.
// Note that third-party revocation signatures are not supported.
// Note also that Identity revocation should be checked separately.
// Normally, it's not necessary to call this function, except on keys returned by
// KeysById or KeysByIdUsage.
func (key *Key) Revoked(now time.Time) bool {
return revoked(key.Revocations, now)
}
// An EntityList contains one or more Entities.
type EntityList []*Entity
// KeysById returns the set of keys that have the given key id.
func (el EntityList) KeysById(id uint64) (keys []Key) {
for _, e := range el {
if e.PrimaryKey.KeyId == id {
ident := e.PrimaryIdentity()
selfSig := ident.SelfSignature
keys = append(keys, Key{e, e.PrimaryKey, e.PrivateKey, selfSig, e.Revocations})
}
for _, subKey := range e.Subkeys {
if subKey.PublicKey.KeyId == id {
keys = append(keys, Key{e, subKey.PublicKey, subKey.PrivateKey, subKey.Sig, subKey.Revocations})
}
}
}
return
}
// KeysByIdAndUsage returns the set of keys with the given id that also meet
// the key usage given by requiredUsage. The requiredUsage is expressed as
// the bitwise-OR of packet.KeyFlag* values.
func (el EntityList) KeysByIdUsage(id uint64, requiredUsage byte) (keys []Key) {
for _, key := range el.KeysById(id) {
if key.SelfSignature != nil && key.SelfSignature.FlagsValid && requiredUsage != 0 {
var usage byte
if key.SelfSignature.FlagCertify {
usage |= packet.KeyFlagCertify
}
if key.SelfSignature.FlagSign {
usage |= packet.KeyFlagSign
}
if key.SelfSignature.FlagEncryptCommunications {
usage |= packet.KeyFlagEncryptCommunications
}
if key.SelfSignature.FlagEncryptStorage {
usage |= packet.KeyFlagEncryptStorage
}
if usage&requiredUsage != requiredUsage {
continue
}
}
keys = append(keys, key)
}
return
}
// DecryptionKeys returns all private keys that are valid for decryption.
func (el EntityList) DecryptionKeys() (keys []Key) {
for _, e := range el {
for _, subKey := range e.Subkeys {
if subKey.PrivateKey != nil && (!subKey.Sig.FlagsValid || subKey.Sig.FlagEncryptStorage || subKey.Sig.FlagEncryptCommunications) {
keys = append(keys, Key{e, subKey.PublicKey, subKey.PrivateKey, subKey.Sig, subKey.Revocations})
}
}
}
return
}
// ReadArmoredKeyRing reads one or more public/private keys from an armor keyring file.
func ReadArmoredKeyRing(r io.Reader) (EntityList, error) {
block, err := armor.Decode(r)
if err == io.EOF {
return nil, errors.InvalidArgumentError("no armored data found")
}
if err != nil {
return nil, err
}
if block.Type != PublicKeyType && block.Type != PrivateKeyType {
return nil, errors.InvalidArgumentError("expected public or private key block, got: " + block.Type)
}
return ReadKeyRing(block.Body)
}
// ReadKeyRing reads one or more public/private keys. Unsupported keys are
// ignored as long as at least a single valid key is found.
func ReadKeyRing(r io.Reader) (el EntityList, err error) {
packets := packet.NewReader(r)
var lastUnsupportedError error
for {
var e *Entity
e, err = ReadEntity(packets)
if err != nil {
// TODO: warn about skipped unsupported/unreadable keys
if _, ok := err.(errors.UnsupportedError); ok {
lastUnsupportedError = err
err = readToNextPublicKey(packets)
} else if _, ok := err.(errors.StructuralError); ok {
// Skip unreadable, badly-formatted keys
lastUnsupportedError = err
err = readToNextPublicKey(packets)
}
if err == io.EOF {
err = nil
break
}
if err != nil {
el = nil
break
}
} else {
el = append(el, e)
}
}
if len(el) == 0 && err == nil {
err = lastUnsupportedError
}
return
}
// readToNextPublicKey reads packets until the start of the entity and leaves
// the first packet of the new entity in the Reader.
func readToNextPublicKey(packets *packet.Reader) (err error) {
var p packet.Packet
for {
p, err = packets.Next()
if err == io.EOF {
return
} else if err != nil {
if _, ok := err.(errors.UnsupportedError); ok {
err = nil
continue
}
return
}
if pk, ok := p.(*packet.PublicKey); ok && !pk.IsSubkey {
packets.Unread(p)
return
}
}
}
// ReadEntity reads an entity (public key, identities, subkeys etc) from the
// given Reader.
func ReadEntity(packets *packet.Reader) (*Entity, error) {
e := new(Entity)
e.Identities = make(map[string]*Identity)
p, err := packets.Next()
if err != nil {
return nil, err
}
var ok bool
if e.PrimaryKey, ok = p.(*packet.PublicKey); !ok {
if e.PrivateKey, ok = p.(*packet.PrivateKey); !ok {
packets.Unread(p)
return nil, errors.StructuralError("first packet was not a public/private key")
}
e.PrimaryKey = &e.PrivateKey.PublicKey
}
if !e.PrimaryKey.PubKeyAlgo.CanSign() {
return nil, errors.StructuralError("primary key cannot be used for signatures")
}
var revocations []*packet.Signature
EachPacket:
for {
p, err := packets.Next()
if err == io.EOF {
break
} else if err != nil {
return nil, err
}
switch pkt := p.(type) {
case *packet.UserId:
if err := addUserID(e, packets, pkt); err != nil {
return nil, err
}
case *packet.Signature:
if pkt.SigType == packet.SigTypeKeyRevocation {
revocations = append(revocations, pkt)
} else if pkt.SigType == packet.SigTypeDirectSignature {
// TODO: RFC4880 5.2.1 permits signatures
// directly on keys (eg. to bind additional
// revocation keys).
}
// Else, ignoring the signature as it does not follow anything
// we would know to attach it to.
case *packet.PrivateKey:
if pkt.IsSubkey == false {
packets.Unread(p)
break EachPacket
}
err = addSubkey(e, packets, &pkt.PublicKey, pkt)
if err != nil {
return nil, err
}
case *packet.PublicKey:
if pkt.IsSubkey == false {
packets.Unread(p)
break EachPacket
}
err = addSubkey(e, packets, pkt, nil)
if err != nil {
return nil, err
}
default:
// we ignore unknown packets
}
}
if len(e.Identities) == 0 {
return nil, errors.StructuralError("entity without any identities")
}
for _, revocation := range revocations {
err = e.PrimaryKey.VerifyRevocationSignature(revocation)
if err == nil {
e.Revocations = append(e.Revocations, revocation)
} else {
// TODO: RFC 4880 5.2.3.15 defines revocation keys.
return nil, errors.StructuralError("revocation signature signed by alternate key")
}
}
return e, nil
}
func addUserID(e *Entity, packets *packet.Reader, pkt *packet.UserId) error {
// Make a new Identity object, that we might wind up throwing away.
// We'll only add it if we get a valid self-signature over this
// userID.
identity := new(Identity)
identity.Name = pkt.Id
identity.UserId = pkt
for {
p, err := packets.Next()
if err == io.EOF {
break
} else if err != nil {
return err
}
sig, ok := p.(*packet.Signature)
if !ok {
packets.Unread(p)
break
}
if sig.SigType != packet.SigTypeGenericCert &&
sig.SigType != packet.SigTypePersonaCert &&
sig.SigType != packet.SigTypeCasualCert &&
sig.SigType != packet.SigTypePositiveCert &&
sig.SigType != packet.SigTypeCertificationRevocation {
return errors.StructuralError("user ID signature with wrong type")
}
if sig.CheckKeyIdOrFingerprint(e.PrimaryKey) {
if err = e.PrimaryKey.VerifyUserIdSignature(pkt.Id, e.PrimaryKey, sig); err != nil {
return errors.StructuralError("user ID self-signature invalid: " + err.Error())
}
if sig.SigType == packet.SigTypeCertificationRevocation {
identity.Revocations = append(identity.Revocations, sig)
} else if identity.SelfSignature == nil || sig.CreationTime.After(identity.SelfSignature.CreationTime) {
identity.SelfSignature = sig
}
identity.Signatures = append(identity.Signatures, sig)
e.Identities[pkt.Id] = identity
} else {
identity.Signatures = append(identity.Signatures, sig)
}
}
return nil
}
func addSubkey(e *Entity, packets *packet.Reader, pub *packet.PublicKey, priv *packet.PrivateKey) error {
var subKey Subkey
subKey.PublicKey = pub
subKey.PrivateKey = priv
for {
p, err := packets.Next()
if err == io.EOF {
break
} else if err != nil {
return errors.StructuralError("subkey signature invalid: " + err.Error())
}
sig, ok := p.(*packet.Signature)
if !ok {
packets.Unread(p)
break
}
if sig.SigType != packet.SigTypeSubkeyBinding && sig.SigType != packet.SigTypeSubkeyRevocation {
return errors.StructuralError("subkey signature with wrong type")
}
if err := e.PrimaryKey.VerifyKeySignature(subKey.PublicKey, sig); err != nil {
return errors.StructuralError("subkey signature invalid: " + err.Error())
}
switch sig.SigType {
case packet.SigTypeSubkeyRevocation:
subKey.Revocations = append(subKey.Revocations, sig)
case packet.SigTypeSubkeyBinding:
if subKey.Sig == nil || sig.CreationTime.After(subKey.Sig.CreationTime) {
subKey.Sig = sig
}
}
}
if subKey.Sig == nil {
return errors.StructuralError("subkey packet not followed by signature")
}
e.Subkeys = append(e.Subkeys, subKey)
return nil
}
// SerializePrivate serializes an Entity, including private key material, but
// excluding signatures from other entities, to the given Writer.
// Identities and subkeys are re-signed in case they changed since NewEntry.
// If config is nil, sensible defaults will be used.
func (e *Entity) SerializePrivate(w io.Writer, config *packet.Config) (err error) {
if e.PrivateKey.Dummy() {
return errors.ErrDummyPrivateKey("dummy private key cannot re-sign identities")
}
return e.serializePrivate(w, config, true)
}
// SerializePrivateWithoutSigning serializes an Entity, including private key
// material, but excluding signatures from other entities, to the given Writer.
// Self-signatures of identities and subkeys are not re-signed. This is useful
// when serializing GNU dummy keys, among other things.
// If config is nil, sensible defaults will be used.
func (e *Entity) SerializePrivateWithoutSigning(w io.Writer, config *packet.Config) (err error) {
return e.serializePrivate(w, config, false)
}
func (e *Entity) serializePrivate(w io.Writer, config *packet.Config, reSign bool) (err error) {
if e.PrivateKey == nil {
return goerrors.New("openpgp: private key is missing")
}
err = e.PrivateKey.Serialize(w)
if err != nil {
return
}
for _, revocation := range e.Revocations {
err := revocation.Serialize(w)
if err != nil {
return err
}
}
for _, ident := range e.Identities {
err = ident.UserId.Serialize(w)
if err != nil {
return
}
if reSign {
if ident.SelfSignature == nil {
return goerrors.New("openpgp: can't re-sign identity without valid self-signature")
}
err = ident.SelfSignature.SignUserId(ident.UserId.Id, e.PrimaryKey, e.PrivateKey, config)
if err != nil {
return
}
}
for _, sig := range ident.Signatures {
err = sig.Serialize(w)
if err != nil {
return err
}
}
}
for _, subkey := range e.Subkeys {
err = subkey.PrivateKey.Serialize(w)
if err != nil {
return
}
if reSign {
err = subkey.Sig.SignKey(subkey.PublicKey, e.PrivateKey, config)
if err != nil {
return
}
if subkey.Sig.EmbeddedSignature != nil {
err = subkey.Sig.EmbeddedSignature.CrossSignKey(subkey.PublicKey, e.PrimaryKey,
subkey.PrivateKey, config)
if err != nil {
return
}
}
}
for _, revocation := range subkey.Revocations {
err := revocation.Serialize(w)
if err != nil {
return err
}
}
err = subkey.Sig.Serialize(w)
if err != nil {
return
}
}
return nil
}
// Serialize writes the public part of the given Entity to w, including
// signatures from other entities. No private key material will be output.
func (e *Entity) Serialize(w io.Writer) error {
err := e.PrimaryKey.Serialize(w)
if err != nil {
return err
}
for _, revocation := range e.Revocations {
err := revocation.Serialize(w)
if err != nil {
return err
}
}
for _, ident := range e.Identities {
err = ident.UserId.Serialize(w)
if err != nil {
return err
}
for _, sig := range ident.Signatures {
err = sig.Serialize(w)
if err != nil {
return err
}
}
}
for _, subkey := range e.Subkeys {
err = subkey.PublicKey.Serialize(w)
if err != nil {
return err
}
for _, revocation := range subkey.Revocations {
err := revocation.Serialize(w)
if err != nil {
return err
}
}
err = subkey.Sig.Serialize(w)
if err != nil {
return err
}
}
return nil
}
// SignIdentity adds a signature to e, from signer, attesting that identity is
// associated with e. The provided identity must already be an element of
// e.Identities and the private key of signer must have been decrypted if
// necessary.
// If config is nil, sensible defaults will be used.
func (e *Entity) SignIdentity(identity string, signer *Entity, config *packet.Config) error {
certificationKey, ok := signer.CertificationKey(config.Now())
if !ok {
return errors.InvalidArgumentError("no valid certification key found")
}
if certificationKey.PrivateKey.Encrypted {
return errors.InvalidArgumentError("signing Entity's private key must be decrypted")
}
ident, ok := e.Identities[identity]
if !ok {
return errors.InvalidArgumentError("given identity string not found in Entity")
}
sig := &packet.Signature{
Version: certificationKey.PrivateKey.Version,
SigType: packet.SigTypeGenericCert,
PubKeyAlgo: certificationKey.PrivateKey.PubKeyAlgo,
Hash: config.Hash(),
CreationTime: config.Now(),
IssuerKeyId: &certificationKey.PrivateKey.KeyId,
}
if config.SigLifetime() != 0 {
sig.SigLifetimeSecs = &config.SigLifetimeSecs
}
signingUserID := config.SigningUserId()
if signingUserID != "" {
if _, ok := signer.Identities[signingUserID]; !ok {
return errors.InvalidArgumentError("signer identity string not found in signer Entity")
}
sig.SignerUserId = &signingUserID
}
if err := sig.SignUserId(identity, e.PrimaryKey, certificationKey.PrivateKey, config); err != nil {
return err
}
ident.Signatures = append(ident.Signatures, sig)
return nil
}
// RevokeKey generates a key revocation signature (packet.SigTypeKeyRevocation) with the
// specified reason code and text (RFC4880 section-5.2.3.23).
// If config is nil, sensible defaults will be used.
func (e *Entity) RevokeKey(reason packet.ReasonForRevocation, reasonText string, config *packet.Config) error {
revSig := &packet.Signature{
Version: e.PrimaryKey.Version,
CreationTime: config.Now(),
SigType: packet.SigTypeKeyRevocation,
PubKeyAlgo: e.PrimaryKey.PubKeyAlgo,
Hash: config.Hash(),
RevocationReason: &reason,
RevocationReasonText: reasonText,
IssuerKeyId: &e.PrimaryKey.KeyId,
}
if err := revSig.RevokeKey(e.PrimaryKey, e.PrivateKey, config); err != nil {
return err
}
e.Revocations = append(e.Revocations, revSig)
return nil
}
// RevokeSubkey generates a subkey revocation signature (packet.SigTypeSubkeyRevocation) for
// a subkey with the specified reason code and text (RFC4880 section-5.2.3.23).
// If config is nil, sensible defaults will be used.
func (e *Entity) RevokeSubkey(sk *Subkey, reason packet.ReasonForRevocation, reasonText string, config *packet.Config) error {
if err := e.PrimaryKey.VerifyKeySignature(sk.PublicKey, sk.Sig); err != nil {
return errors.InvalidArgumentError("given subkey is not associated with this key")
}
revSig := &packet.Signature{
Version: e.PrimaryKey.Version,
CreationTime: config.Now(),
SigType: packet.SigTypeSubkeyRevocation,
PubKeyAlgo: e.PrimaryKey.PubKeyAlgo,
Hash: config.Hash(),
RevocationReason: &reason,
RevocationReasonText: reasonText,
IssuerKeyId: &e.PrimaryKey.KeyId,
}
if err := revSig.RevokeSubkey(sk.PublicKey, e.PrivateKey, config); err != nil {
return err
}
sk.Revocations = append(sk.Revocations, revSig)
return nil
}

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vendor/github.com/ProtonMail/go-crypto/openpgp/packet/aead_config.go generated vendored Normal file
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// Copyright (C) 2019 ProtonTech AG
package packet
import "math/bits"
// AEADConfig collects a number of AEAD parameters along with sensible defaults.
// A nil AEADConfig is valid and results in all default values.
type AEADConfig struct {
// The AEAD mode of operation.
DefaultMode AEADMode
// Amount of octets in each chunk of data
ChunkSize uint64
}
// Mode returns the AEAD mode of operation.
func (conf *AEADConfig) Mode() AEADMode {
if conf == nil || conf.DefaultMode == 0 {
return AEADModeEAX
}
mode := conf.DefaultMode
if mode != AEADModeEAX && mode != AEADModeOCB &&
mode != AEADModeExperimentalGCM {
panic("AEAD mode unsupported")
}
return mode
}
// ChunkSizeByte returns the byte indicating the chunk size. The effective
// chunk size is computed with the formula uint64(1) << (chunkSizeByte + 6)
func (conf *AEADConfig) ChunkSizeByte() byte {
if conf == nil || conf.ChunkSize == 0 {
return 12 // 1 << (12 + 6) == 262144 bytes
}
chunkSize := conf.ChunkSize
exponent := bits.Len64(chunkSize) - 1
switch {
case exponent < 6:
exponent = 6
case exponent > 27:
exponent = 27
}
return byte(exponent - 6)
}
// decodeAEADChunkSize returns the effective chunk size. In 32-bit systems, the
// maximum returned value is 1 << 30.
func decodeAEADChunkSize(c byte) int {
size := uint64(1 << (c + 6))
if size != uint64(int(size)) {
return 1 << 30
}
return int(size)
}

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// Copyright (C) 2019 ProtonTech AG
package packet
import (
"bytes"
"crypto/cipher"
"crypto/rand"
"encoding/binary"
"io"
"github.com/ProtonMail/go-crypto/openpgp/errors"
"github.com/ProtonMail/go-crypto/openpgp/internal/algorithm"
)
// AEADEncrypted represents an AEAD Encrypted Packet (tag 20, RFC4880bis-5.16).
type AEADEncrypted struct {
cipher CipherFunction
mode AEADMode
chunkSizeByte byte
Contents io.Reader // Encrypted chunks and tags
initialNonce []byte // Referred to as IV in RFC4880-bis
}
// Only currently defined version
const aeadEncryptedVersion = 1
// An AEAD opener/sealer, its configuration, and data for en/decryption.
type aeadCrypter struct {
aead cipher.AEAD
chunkSize int
initialNonce []byte
associatedData []byte // Chunk-independent associated data
chunkIndex []byte // Chunk counter
bytesProcessed int // Amount of plaintext bytes encrypted/decrypted
buffer bytes.Buffer // Buffered bytes across chunks
}
// aeadEncrypter encrypts and writes bytes. It encrypts when necessary according
// to the AEAD block size, and buffers the extra encrypted bytes for next write.
type aeadEncrypter struct {
aeadCrypter // Embedded plaintext sealer
writer io.WriteCloser // 'writer' is a partialLengthWriter
}
// aeadDecrypter reads and decrypts bytes. It buffers extra decrypted bytes when
// necessary, similar to aeadEncrypter.
type aeadDecrypter struct {
aeadCrypter // Embedded ciphertext opener
reader io.Reader // 'reader' is a partialLengthReader
peekedBytes []byte // Used to detect last chunk
eof bool
}
func (ae *AEADEncrypted) parse(buf io.Reader) error {
headerData := make([]byte, 4)
if n, err := io.ReadFull(buf, headerData); n < 4 {
return errors.AEADError("could not read aead header:" + err.Error())
}
// Read initial nonce
mode := AEADMode(headerData[2])
nonceLen := mode.NonceLength()
if nonceLen == 0 {
return errors.AEADError("unknown mode")
}
initialNonce := make([]byte, nonceLen)
if n, err := io.ReadFull(buf, initialNonce); n < nonceLen {
return errors.AEADError("could not read aead nonce:" + err.Error())
}
ae.Contents = buf
ae.initialNonce = initialNonce
c := headerData[1]
if _, ok := algorithm.CipherById[c]; !ok {
return errors.UnsupportedError("unknown cipher: " + string(c))
}
ae.cipher = CipherFunction(c)
ae.mode = mode
ae.chunkSizeByte = byte(headerData[3])
return nil
}
// Decrypt returns a io.ReadCloser from which decrypted bytes can be read, or
// an error.
func (ae *AEADEncrypted) Decrypt(ciph CipherFunction, key []byte) (io.ReadCloser, error) {
return ae.decrypt(key)
}
// decrypt prepares an aeadCrypter and returns a ReadCloser from which
// decrypted bytes can be read (see aeadDecrypter.Read()).
func (ae *AEADEncrypted) decrypt(key []byte) (io.ReadCloser, error) {
blockCipher := ae.cipher.new(key)
aead := ae.mode.new(blockCipher)
// Carry the first tagLen bytes
tagLen := ae.mode.TagLength()
peekedBytes := make([]byte, tagLen)
n, err := io.ReadFull(ae.Contents, peekedBytes)
if n < tagLen || (err != nil && err != io.EOF) {
return nil, errors.AEADError("Not enough data to decrypt:" + err.Error())
}
chunkSize := decodeAEADChunkSize(ae.chunkSizeByte)
return &aeadDecrypter{
aeadCrypter: aeadCrypter{
aead: aead,
chunkSize: chunkSize,
initialNonce: ae.initialNonce,
associatedData: ae.associatedData(),
chunkIndex: make([]byte, 8),
},
reader: ae.Contents,
peekedBytes: peekedBytes}, nil
}
// Read decrypts bytes and reads them into dst. It decrypts when necessary and
// buffers extra decrypted bytes. It returns the number of bytes copied into dst
// and an error.
func (ar *aeadDecrypter) Read(dst []byte) (n int, err error) {
// Return buffered plaintext bytes from previous calls
if ar.buffer.Len() > 0 {
return ar.buffer.Read(dst)
}
// Return EOF if we've previously validated the final tag
if ar.eof {
return 0, io.EOF
}
// Read a chunk
tagLen := ar.aead.Overhead()
cipherChunkBuf := new(bytes.Buffer)
_, errRead := io.CopyN(cipherChunkBuf, ar.reader, int64(ar.chunkSize + tagLen))
cipherChunk := cipherChunkBuf.Bytes()
if errRead != nil && errRead != io.EOF {
return 0, errRead
}
decrypted, errChunk := ar.openChunk(cipherChunk)
if errChunk != nil {
return 0, errChunk
}
// Return decrypted bytes, buffering if necessary
if len(dst) < len(decrypted) {
n = copy(dst, decrypted[:len(dst)])
ar.buffer.Write(decrypted[len(dst):])
} else {
n = copy(dst, decrypted)
}
// Check final authentication tag
if errRead == io.EOF {
errChunk := ar.validateFinalTag(ar.peekedBytes)
if errChunk != nil {
return n, errChunk
}
ar.eof = true // Mark EOF for when we've returned all buffered data
}
return
}
// Close is noOp. The final authentication tag of the stream was already
// checked in the last Read call. In the future, this function could be used to
// wipe the reader and peeked, decrypted bytes, if necessary.
func (ar *aeadDecrypter) Close() (err error) {
return nil
}
// SerializeAEADEncrypted initializes the aeadCrypter and returns a writer.
// This writer encrypts and writes bytes (see aeadEncrypter.Write()).
func SerializeAEADEncrypted(w io.Writer, key []byte, cipher CipherFunction, mode AEADMode, config *Config) (io.WriteCloser, error) {
writeCloser := noOpCloser{w}
writer, err := serializeStreamHeader(writeCloser, packetTypeAEADEncrypted)
if err != nil {
return nil, err
}
// Data for en/decryption: tag, version, cipher, aead mode, chunk size
aeadConf := config.AEAD()
prefix := []byte{
0xD4,
aeadEncryptedVersion,
byte(config.Cipher()),
byte(aeadConf.Mode()),
aeadConf.ChunkSizeByte(),
}
n, err := writer.Write(prefix[1:])
if err != nil || n < 4 {
return nil, errors.AEADError("could not write AEAD headers")
}
// Sample nonce
nonceLen := aeadConf.Mode().NonceLength()
nonce := make([]byte, nonceLen)
n, err = rand.Read(nonce)
if err != nil {
panic("Could not sample random nonce")
}
_, err = writer.Write(nonce)
if err != nil {
return nil, err
}
blockCipher := CipherFunction(config.Cipher()).new(key)
alg := AEADMode(aeadConf.Mode()).new(blockCipher)
chunkSize := decodeAEADChunkSize(aeadConf.ChunkSizeByte())
return &aeadEncrypter{
aeadCrypter: aeadCrypter{
aead: alg,
chunkSize: chunkSize,
associatedData: prefix,
chunkIndex: make([]byte, 8),
initialNonce: nonce,
},
writer: writer}, nil
}
// Write encrypts and writes bytes. It encrypts when necessary and buffers extra
// plaintext bytes for next call. When the stream is finished, Close() MUST be
// called to append the final tag.
func (aw *aeadEncrypter) Write(plaintextBytes []byte) (n int, err error) {
// Append plaintextBytes to existing buffered bytes
n, err = aw.buffer.Write(plaintextBytes)
if err != nil {
return n, err
}
// Encrypt and write chunks
for aw.buffer.Len() >= aw.chunkSize {
plainChunk := aw.buffer.Next(aw.chunkSize)
encryptedChunk, err := aw.sealChunk(plainChunk)
if err != nil {
return n, err
}
_, err = aw.writer.Write(encryptedChunk)
if err != nil {
return n, err
}
}
return
}
// Close encrypts and writes the remaining buffered plaintext if any, appends
// the final authentication tag, and closes the embedded writer. This function
// MUST be called at the end of a stream.
func (aw *aeadEncrypter) Close() (err error) {
// Encrypt and write a chunk if there's buffered data left, or if we haven't
// written any chunks yet.
if aw.buffer.Len() > 0 || aw.bytesProcessed == 0 {
plainChunk := aw.buffer.Bytes()
lastEncryptedChunk, err := aw.sealChunk(plainChunk)
if err != nil {
return err
}
_, err = aw.writer.Write(lastEncryptedChunk)
if err != nil {
return err
}
}
// Compute final tag (associated data: packet tag, version, cipher, aead,
// chunk size, index, total number of encrypted octets).
adata := append(aw.associatedData[:], aw.chunkIndex[:]...)
adata = append(adata, make([]byte, 8)...)
binary.BigEndian.PutUint64(adata[13:], uint64(aw.bytesProcessed))
nonce := aw.computeNextNonce()
finalTag := aw.aead.Seal(nil, nonce, nil, adata)
_, err = aw.writer.Write(finalTag)
if err != nil {
return err
}
return aw.writer.Close()
}
// sealChunk Encrypts and authenticates the given chunk.
func (aw *aeadEncrypter) sealChunk(data []byte) ([]byte, error) {
if len(data) > aw.chunkSize {
return nil, errors.AEADError("chunk exceeds maximum length")
}
if aw.associatedData == nil {
return nil, errors.AEADError("can't seal without headers")
}
adata := append(aw.associatedData, aw.chunkIndex...)
nonce := aw.computeNextNonce()
encrypted := aw.aead.Seal(nil, nonce, data, adata)
aw.bytesProcessed += len(data)
if err := aw.aeadCrypter.incrementIndex(); err != nil {
return nil, err
}
return encrypted, nil
}
// openChunk decrypts and checks integrity of an encrypted chunk, returning
// the underlying plaintext and an error. It access peeked bytes from next
// chunk, to identify the last chunk and decrypt/validate accordingly.
func (ar *aeadDecrypter) openChunk(data []byte) ([]byte, error) {
tagLen := ar.aead.Overhead()
// Restore carried bytes from last call
chunkExtra := append(ar.peekedBytes, data...)
// 'chunk' contains encrypted bytes, followed by an authentication tag.
chunk := chunkExtra[:len(chunkExtra)-tagLen]
ar.peekedBytes = chunkExtra[len(chunkExtra)-tagLen:]
adata := append(ar.associatedData, ar.chunkIndex...)
nonce := ar.computeNextNonce()
plainChunk, err := ar.aead.Open(nil, nonce, chunk, adata)
if err != nil {
return nil, err
}
ar.bytesProcessed += len(plainChunk)
if err = ar.aeadCrypter.incrementIndex(); err != nil {
return nil, err
}
return plainChunk, nil
}
// Checks the summary tag. It takes into account the total decrypted bytes into
// the associated data. It returns an error, or nil if the tag is valid.
func (ar *aeadDecrypter) validateFinalTag(tag []byte) error {
// Associated: tag, version, cipher, aead, chunk size, index, and octets
amountBytes := make([]byte, 8)
binary.BigEndian.PutUint64(amountBytes, uint64(ar.bytesProcessed))
adata := append(ar.associatedData, ar.chunkIndex...)
adata = append(adata, amountBytes...)
nonce := ar.computeNextNonce()
_, err := ar.aead.Open(nil, nonce, tag, adata)
if err != nil {
return err
}
return nil
}
// Associated data for chunks: tag, version, cipher, mode, chunk size byte
func (ae *AEADEncrypted) associatedData() []byte {
return []byte{
0xD4,
aeadEncryptedVersion,
byte(ae.cipher),
byte(ae.mode),
ae.chunkSizeByte}
}
// computeNonce takes the incremental index and computes an eXclusive OR with
// the least significant 8 bytes of the receivers' initial nonce (see sec.
// 5.16.1 and 5.16.2). It returns the resulting nonce.
func (wo *aeadCrypter) computeNextNonce() (nonce []byte) {
nonce = make([]byte, len(wo.initialNonce))
copy(nonce, wo.initialNonce)
offset := len(wo.initialNonce) - 8
for i := 0; i < 8; i++ {
nonce[i+offset] ^= wo.chunkIndex[i]
}
return
}
// incrementIndex performs an integer increment by 1 of the integer represented by the
// slice, modifying it accordingly.
func (wo *aeadCrypter) incrementIndex() error {
index := wo.chunkIndex
if len(index) == 0 {
return errors.AEADError("Index has length 0")
}
for i := len(index) - 1; i >= 0; i-- {
if index[i] < 255 {
index[i]++
return nil
}
index[i] = 0
}
return errors.AEADError("cannot further increment index")
}

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vendor/github.com/ProtonMail/go-crypto/openpgp/packet/compressed.go generated vendored Normal file
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// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package packet
import (
"compress/bzip2"
"compress/flate"
"compress/zlib"
"github.com/ProtonMail/go-crypto/openpgp/errors"
"io"
"strconv"
)
// Compressed represents a compressed OpenPGP packet. The decompressed contents
// will contain more OpenPGP packets. See RFC 4880, section 5.6.
type Compressed struct {
Body io.Reader
}
const (
NoCompression = flate.NoCompression
BestSpeed = flate.BestSpeed
BestCompression = flate.BestCompression
DefaultCompression = flate.DefaultCompression
)
// CompressionConfig contains compressor configuration settings.
type CompressionConfig struct {
// Level is the compression level to use. It must be set to
// between -1 and 9, with -1 causing the compressor to use the
// default compression level, 0 causing the compressor to use
// no compression and 1 to 9 representing increasing (better,
// slower) compression levels. If Level is less than -1 or
// more then 9, a non-nil error will be returned during
// encryption. See the constants above for convenient common
// settings for Level.
Level int
}
func (c *Compressed) parse(r io.Reader) error {
var buf [1]byte
_, err := readFull(r, buf[:])
if err != nil {
return err
}
switch buf[0] {
case 0:
c.Body = r
case 1:
c.Body = flate.NewReader(r)
case 2:
c.Body, err = zlib.NewReader(r)
case 3:
c.Body = bzip2.NewReader(r)
default:
err = errors.UnsupportedError("unknown compression algorithm: " + strconv.Itoa(int(buf[0])))
}
return err
}
// compressedWriterCloser represents the serialized compression stream
// header and the compressor. Its Close() method ensures that both the
// compressor and serialized stream header are closed. Its Write()
// method writes to the compressor.
type compressedWriteCloser struct {
sh io.Closer // Stream Header
c io.WriteCloser // Compressor
}
func (cwc compressedWriteCloser) Write(p []byte) (int, error) {
return cwc.c.Write(p)
}
func (cwc compressedWriteCloser) Close() (err error) {
err = cwc.c.Close()
if err != nil {
return err
}
return cwc.sh.Close()
}
// SerializeCompressed serializes a compressed data packet to w and
// returns a WriteCloser to which the literal data packets themselves
// can be written and which MUST be closed on completion. If cc is
// nil, sensible defaults will be used to configure the compression
// algorithm.
func SerializeCompressed(w io.WriteCloser, algo CompressionAlgo, cc *CompressionConfig) (literaldata io.WriteCloser, err error) {
compressed, err := serializeStreamHeader(w, packetTypeCompressed)
if err != nil {
return
}
_, err = compressed.Write([]byte{uint8(algo)})
if err != nil {
return
}
level := DefaultCompression
if cc != nil {
level = cc.Level
}
var compressor io.WriteCloser
switch algo {
case CompressionZIP:
compressor, err = flate.NewWriter(compressed, level)
case CompressionZLIB:
compressor, err = zlib.NewWriterLevel(compressed, level)
default:
s := strconv.Itoa(int(algo))
err = errors.UnsupportedError("Unsupported compression algorithm: " + s)
}
if err != nil {
return
}
literaldata = compressedWriteCloser{compressed, compressor}
return
}

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vendor/github.com/ProtonMail/go-crypto/openpgp/packet/config.go generated vendored Normal file
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// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package packet
import (
"crypto"
"crypto/rand"
"io"
"math/big"
"time"
)
// Config collects a number of parameters along with sensible defaults.
// A nil *Config is valid and results in all default values.
type Config struct {
// Rand provides the source of entropy.
// If nil, the crypto/rand Reader is used.
Rand io.Reader
// DefaultHash is the default hash function to be used.
// If zero, SHA-256 is used.
DefaultHash crypto.Hash
// DefaultCipher is the cipher to be used.
// If zero, AES-128 is used.
DefaultCipher CipherFunction
// Time returns the current time as the number of seconds since the
// epoch. If Time is nil, time.Now is used.
Time func() time.Time
// DefaultCompressionAlgo is the compression algorithm to be
// applied to the plaintext before encryption. If zero, no
// compression is done.
DefaultCompressionAlgo CompressionAlgo
// CompressionConfig configures the compression settings.
CompressionConfig *CompressionConfig
// S2KCount is only used for symmetric encryption. It
// determines the strength of the passphrase stretching when
// the said passphrase is hashed to produce a key. S2KCount
// should be between 1024 and 65011712, inclusive. If Config
// is nil or S2KCount is 0, the value 65536 used. Not all
// values in the above range can be represented. S2KCount will
// be rounded up to the next representable value if it cannot
// be encoded exactly. When set, it is strongly encrouraged to
// use a value that is at least 65536. See RFC 4880 Section
// 3.7.1.3.
S2KCount int
// RSABits is the number of bits in new RSA keys made with NewEntity.
// If zero, then 2048 bit keys are created.
RSABits int
// The public key algorithm to use - will always create a signing primary
// key and encryption subkey.
Algorithm PublicKeyAlgorithm
// Some known primes that are optionally prepopulated by the caller
RSAPrimes []*big.Int
// Curve configures the desired packet.Curve if the Algorithm is PubKeyAlgoECDSA,
// PubKeyAlgoEdDSA, or PubKeyAlgoECDH. If empty Curve25519 is used.
Curve Curve
// AEADConfig configures the use of the new AEAD Encrypted Data Packet,
// defined in the draft of the next version of the OpenPGP specification.
// If a non-nil AEADConfig is passed, usage of this packet is enabled. By
// default, it is disabled. See the documentation of AEADConfig for more
// configuration options related to AEAD.
// **Note: using this option may break compatibility with other OpenPGP
// implementations, as well as future versions of this library.**
AEADConfig *AEADConfig
// V5Keys configures version 5 key generation. If false, this package still
// supports version 5 keys, but produces version 4 keys.
V5Keys bool
// "The validity period of the key. This is the number of seconds after
// the key creation time that the key expires. If this is not present
// or has a value of zero, the key never expires. This is found only on
// a self-signature.""
// https://tools.ietf.org/html/rfc4880#section-5.2.3.6
KeyLifetimeSecs uint32
// "The validity period of the signature. This is the number of seconds
// after the signature creation time that the signature expires. If
// this is not present or has a value of zero, it never expires."
// https://tools.ietf.org/html/rfc4880#section-5.2.3.10
SigLifetimeSecs uint32
// SigningKeyId is used to specify the signing key to use (by Key ID).
// By default, the signing key is selected automatically, preferring
// signing subkeys if available.
SigningKeyId uint64
// SigningIdentity is used to specify a user ID (packet Signer's User ID, type 28)
// when producing a generic certification signature onto an existing user ID.
// The identity must be present in the signer Entity.
SigningIdentity string
}
func (c *Config) Random() io.Reader {
if c == nil || c.Rand == nil {
return rand.Reader
}
return c.Rand
}
func (c *Config) Hash() crypto.Hash {
if c == nil || uint(c.DefaultHash) == 0 {
return crypto.SHA256
}
return c.DefaultHash
}
func (c *Config) Cipher() CipherFunction {
if c == nil || uint8(c.DefaultCipher) == 0 {
return CipherAES128
}
return c.DefaultCipher
}
func (c *Config) Now() time.Time {
if c == nil || c.Time == nil {
return time.Now()
}
return c.Time()
}
// KeyLifetime returns the validity period of the key.
func (c *Config) KeyLifetime() uint32 {
if c == nil {
return 0
}
return c.KeyLifetimeSecs
}
// SigLifetime returns the validity period of the signature.
func (c *Config) SigLifetime() uint32 {
if c == nil {
return 0
}
return c.SigLifetimeSecs
}
func (c *Config) Compression() CompressionAlgo {
if c == nil {
return CompressionNone
}
return c.DefaultCompressionAlgo
}
func (c *Config) PasswordHashIterations() int {
if c == nil || c.S2KCount == 0 {
return 0
}
return c.S2KCount
}
func (c *Config) RSAModulusBits() int {
if c == nil || c.RSABits == 0 {
return 2048
}
return c.RSABits
}
func (c *Config) PublicKeyAlgorithm() PublicKeyAlgorithm {
if c == nil || c.Algorithm == 0 {
return PubKeyAlgoRSA
}
return c.Algorithm
}
func (c *Config) CurveName() Curve {
if c == nil || c.Curve == "" {
return Curve25519
}
return c.Curve
}
func (c *Config) AEAD() *AEADConfig {
if c == nil {
return nil
}
return c.AEADConfig
}
func (c *Config) SigningKey() uint64 {
if c == nil {
return 0
}
return c.SigningKeyId
}
func (c *Config) SigningUserId() string {
if c == nil {
return ""
}
return c.SigningIdentity
}

282
vendor/github.com/ProtonMail/go-crypto/openpgp/packet/encrypted_key.go generated vendored Normal file
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@@ -0,0 +1,282 @@
// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package packet
import (
"crypto"
"crypto/rsa"
"encoding/binary"
"io"
"math/big"
"strconv"
"github.com/ProtonMail/go-crypto/openpgp/ecdh"
"github.com/ProtonMail/go-crypto/openpgp/elgamal"
"github.com/ProtonMail/go-crypto/openpgp/errors"
"github.com/ProtonMail/go-crypto/openpgp/internal/encoding"
)
const encryptedKeyVersion = 3
// EncryptedKey represents a public-key encrypted session key. See RFC 4880,
// section 5.1.
type EncryptedKey struct {
KeyId uint64
Algo PublicKeyAlgorithm
CipherFunc CipherFunction // only valid after a successful Decrypt
Key []byte // only valid after a successful Decrypt
encryptedMPI1, encryptedMPI2 encoding.Field
}
func (e *EncryptedKey) parse(r io.Reader) (err error) {
var buf [10]byte
_, err = readFull(r, buf[:])
if err != nil {
return
}
if buf[0] != encryptedKeyVersion {
return errors.UnsupportedError("unknown EncryptedKey version " + strconv.Itoa(int(buf[0])))
}
e.KeyId = binary.BigEndian.Uint64(buf[1:9])
e.Algo = PublicKeyAlgorithm(buf[9])
switch e.Algo {
case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly:
e.encryptedMPI1 = new(encoding.MPI)
if _, err = e.encryptedMPI1.ReadFrom(r); err != nil {
return
}
case PubKeyAlgoElGamal:
e.encryptedMPI1 = new(encoding.MPI)
if _, err = e.encryptedMPI1.ReadFrom(r); err != nil {
return
}
e.encryptedMPI2 = new(encoding.MPI)
if _, err = e.encryptedMPI2.ReadFrom(r); err != nil {
return
}
case PubKeyAlgoECDH:
e.encryptedMPI1 = new(encoding.MPI)
if _, err = e.encryptedMPI1.ReadFrom(r); err != nil {
return
}
e.encryptedMPI2 = new(encoding.OID)
if _, err = e.encryptedMPI2.ReadFrom(r); err != nil {
return
}
}
_, err = consumeAll(r)
return
}
func checksumKeyMaterial(key []byte) uint16 {
var checksum uint16
for _, v := range key {
checksum += uint16(v)
}
return checksum
}
// Decrypt decrypts an encrypted session key with the given private key. The
// private key must have been decrypted first.
// If config is nil, sensible defaults will be used.
func (e *EncryptedKey) Decrypt(priv *PrivateKey, config *Config) error {
if e.KeyId != 0 && e.KeyId != priv.KeyId {
return errors.InvalidArgumentError("cannot decrypt encrypted session key for key id " + strconv.FormatUint(e.KeyId, 16) + " with private key id " + strconv.FormatUint(priv.KeyId, 16))
}
if e.Algo != priv.PubKeyAlgo {
return errors.InvalidArgumentError("cannot decrypt encrypted session key of type " + strconv.Itoa(int(e.Algo)) + " with private key of type " + strconv.Itoa(int(priv.PubKeyAlgo)))
}
if priv.Dummy() {
return errors.ErrDummyPrivateKey("dummy key found")
}
var err error
var b []byte
// TODO(agl): use session key decryption routines here to avoid
// padding oracle attacks.
switch priv.PubKeyAlgo {
case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly:
// Supports both *rsa.PrivateKey and crypto.Decrypter
k := priv.PrivateKey.(crypto.Decrypter)
b, err = k.Decrypt(config.Random(), padToKeySize(k.Public().(*rsa.PublicKey), e.encryptedMPI1.Bytes()), nil)
case PubKeyAlgoElGamal:
c1 := new(big.Int).SetBytes(e.encryptedMPI1.Bytes())
c2 := new(big.Int).SetBytes(e.encryptedMPI2.Bytes())
b, err = elgamal.Decrypt(priv.PrivateKey.(*elgamal.PrivateKey), c1, c2)
case PubKeyAlgoECDH:
vsG := e.encryptedMPI1.Bytes()
m := e.encryptedMPI2.Bytes()
oid := priv.PublicKey.oid.EncodedBytes()
b, err = ecdh.Decrypt(priv.PrivateKey.(*ecdh.PrivateKey), vsG, m, oid, priv.PublicKey.Fingerprint[:])
default:
err = errors.InvalidArgumentError("cannot decrypt encrypted session key with private key of type " + strconv.Itoa(int(priv.PubKeyAlgo)))
}
if err != nil {
return err
}
e.CipherFunc = CipherFunction(b[0])
e.Key = b[1 : len(b)-2]
expectedChecksum := uint16(b[len(b)-2])<<8 | uint16(b[len(b)-1])
checksum := checksumKeyMaterial(e.Key)
if checksum != expectedChecksum {
return errors.StructuralError("EncryptedKey checksum incorrect")
}
return nil
}
// Serialize writes the encrypted key packet, e, to w.
func (e *EncryptedKey) Serialize(w io.Writer) error {
var mpiLen int
switch e.Algo {
case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly:
mpiLen = int(e.encryptedMPI1.EncodedLength())
case PubKeyAlgoElGamal:
mpiLen = int(e.encryptedMPI1.EncodedLength()) + int(e.encryptedMPI2.EncodedLength())
case PubKeyAlgoECDH:
mpiLen = int(e.encryptedMPI1.EncodedLength()) + int(e.encryptedMPI2.EncodedLength())
default:
return errors.InvalidArgumentError("don't know how to serialize encrypted key type " + strconv.Itoa(int(e.Algo)))
}
err := serializeHeader(w, packetTypeEncryptedKey, 1 /* version */ +8 /* key id */ +1 /* algo */ +mpiLen)
if err != nil {
return err
}
w.Write([]byte{encryptedKeyVersion})
binary.Write(w, binary.BigEndian, e.KeyId)
w.Write([]byte{byte(e.Algo)})
switch e.Algo {
case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly:
_, err := w.Write(e.encryptedMPI1.EncodedBytes())
return err
case PubKeyAlgoElGamal:
if _, err := w.Write(e.encryptedMPI1.EncodedBytes()); err != nil {
return err
}
_, err := w.Write(e.encryptedMPI2.EncodedBytes())
return err
case PubKeyAlgoECDH:
if _, err := w.Write(e.encryptedMPI1.EncodedBytes()); err != nil {
return err
}
_, err := w.Write(e.encryptedMPI2.EncodedBytes())
return err
default:
panic("internal error")
}
}
// SerializeEncryptedKey serializes an encrypted key packet to w that contains
// key, encrypted to pub.
// If config is nil, sensible defaults will be used.
func SerializeEncryptedKey(w io.Writer, pub *PublicKey, cipherFunc CipherFunction, key []byte, config *Config) error {
var buf [10]byte
buf[0] = encryptedKeyVersion
binary.BigEndian.PutUint64(buf[1:9], pub.KeyId)
buf[9] = byte(pub.PubKeyAlgo)
keyBlock := make([]byte, 1 /* cipher type */ +len(key)+2 /* checksum */)
keyBlock[0] = byte(cipherFunc)
copy(keyBlock[1:], key)
checksum := checksumKeyMaterial(key)
keyBlock[1+len(key)] = byte(checksum >> 8)
keyBlock[1+len(key)+1] = byte(checksum)
switch pub.PubKeyAlgo {
case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly:
return serializeEncryptedKeyRSA(w, config.Random(), buf, pub.PublicKey.(*rsa.PublicKey), keyBlock)
case PubKeyAlgoElGamal:
return serializeEncryptedKeyElGamal(w, config.Random(), buf, pub.PublicKey.(*elgamal.PublicKey), keyBlock)
case PubKeyAlgoECDH:
return serializeEncryptedKeyECDH(w, config.Random(), buf, pub.PublicKey.(*ecdh.PublicKey), keyBlock, pub.oid, pub.Fingerprint)
case PubKeyAlgoDSA, PubKeyAlgoRSASignOnly:
return errors.InvalidArgumentError("cannot encrypt to public key of type " + strconv.Itoa(int(pub.PubKeyAlgo)))
}
return errors.UnsupportedError("encrypting a key to public key of type " + strconv.Itoa(int(pub.PubKeyAlgo)))
}
func serializeEncryptedKeyRSA(w io.Writer, rand io.Reader, header [10]byte, pub *rsa.PublicKey, keyBlock []byte) error {
cipherText, err := rsa.EncryptPKCS1v15(rand, pub, keyBlock)
if err != nil {
return errors.InvalidArgumentError("RSA encryption failed: " + err.Error())
}
cipherMPI := encoding.NewMPI(cipherText)
packetLen := 10 /* header length */ + int(cipherMPI.EncodedLength())
err = serializeHeader(w, packetTypeEncryptedKey, packetLen)
if err != nil {
return err
}
_, err = w.Write(header[:])
if err != nil {
return err
}
_, err = w.Write(cipherMPI.EncodedBytes())
return err
}
func serializeEncryptedKeyElGamal(w io.Writer, rand io.Reader, header [10]byte, pub *elgamal.PublicKey, keyBlock []byte) error {
c1, c2, err := elgamal.Encrypt(rand, pub, keyBlock)
if err != nil {
return errors.InvalidArgumentError("ElGamal encryption failed: " + err.Error())
}
packetLen := 10 /* header length */
packetLen += 2 /* mpi size */ + (c1.BitLen()+7)/8
packetLen += 2 /* mpi size */ + (c2.BitLen()+7)/8
err = serializeHeader(w, packetTypeEncryptedKey, packetLen)
if err != nil {
return err
}
_, err = w.Write(header[:])
if err != nil {
return err
}
if _, err = w.Write(new(encoding.MPI).SetBig(c1).EncodedBytes()); err != nil {
return err
}
_, err = w.Write(new(encoding.MPI).SetBig(c2).EncodedBytes())
return err
}
func serializeEncryptedKeyECDH(w io.Writer, rand io.Reader, header [10]byte, pub *ecdh.PublicKey, keyBlock []byte, oid encoding.Field, fingerprint []byte) error {
vsG, c, err := ecdh.Encrypt(rand, pub, keyBlock, oid.EncodedBytes(), fingerprint)
if err != nil {
return errors.InvalidArgumentError("ECDH encryption failed: " + err.Error())
}
g := encoding.NewMPI(vsG)
m := encoding.NewOID(c)
packetLen := 10 /* header length */
packetLen += int(g.EncodedLength()) + int(m.EncodedLength())
err = serializeHeader(w, packetTypeEncryptedKey, packetLen)
if err != nil {
return err
}
_, err = w.Write(header[:])
if err != nil {
return err
}
if _, err = w.Write(g.EncodedBytes()); err != nil {
return err
}
_, err = w.Write(m.EncodedBytes())
return err
}

91
vendor/github.com/ProtonMail/go-crypto/openpgp/packet/literal.go generated vendored Normal file
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// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package packet
import (
"encoding/binary"
"io"
)
// LiteralData represents an encrypted file. See RFC 4880, section 5.9.
type LiteralData struct {
Format uint8
IsBinary bool
FileName string
Time uint32 // Unix epoch time. Either creation time or modification time. 0 means undefined.
Body io.Reader
}
// ForEyesOnly returns whether the contents of the LiteralData have been marked
// as especially sensitive.
func (l *LiteralData) ForEyesOnly() bool {
return l.FileName == "_CONSOLE"
}
func (l *LiteralData) parse(r io.Reader) (err error) {
var buf [256]byte
_, err = readFull(r, buf[:2])
if err != nil {
return
}
l.Format = buf[0]
l.IsBinary = l.Format == 'b'
fileNameLen := int(buf[1])
_, err = readFull(r, buf[:fileNameLen])
if err != nil {
return
}
l.FileName = string(buf[:fileNameLen])
_, err = readFull(r, buf[:4])
if err != nil {
return
}
l.Time = binary.BigEndian.Uint32(buf[:4])
l.Body = r
return
}
// SerializeLiteral serializes a literal data packet to w and returns a
// WriteCloser to which the data itself can be written and which MUST be closed
// on completion. The fileName is truncated to 255 bytes.
func SerializeLiteral(w io.WriteCloser, isBinary bool, fileName string, time uint32) (plaintext io.WriteCloser, err error) {
var buf [4]byte
buf[0] = 't'
if isBinary {
buf[0] = 'b'
}
if len(fileName) > 255 {
fileName = fileName[:255]
}
buf[1] = byte(len(fileName))
inner, err := serializeStreamHeader(w, packetTypeLiteralData)
if err != nil {
return
}
_, err = inner.Write(buf[:2])
if err != nil {
return
}
_, err = inner.Write([]byte(fileName))
if err != nil {
return
}
binary.BigEndian.PutUint32(buf[:], time)
_, err = inner.Write(buf[:])
if err != nil {
return
}
plaintext = inner
return
}

137
vendor/github.com/ProtonMail/go-crypto/openpgp/packet/ocfb.go generated vendored Normal file
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// Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// OpenPGP CFB Mode. http://tools.ietf.org/html/rfc4880#section-13.9
package packet
import (
"crypto/cipher"
)
type ocfbEncrypter struct {
b cipher.Block
fre []byte
outUsed int
}
// An OCFBResyncOption determines if the "resynchronization step" of OCFB is
// performed.
type OCFBResyncOption bool
const (
OCFBResync OCFBResyncOption = true
OCFBNoResync OCFBResyncOption = false
)
// NewOCFBEncrypter returns a cipher.Stream which encrypts data with OpenPGP's
// cipher feedback mode using the given cipher.Block, and an initial amount of
// ciphertext. randData must be random bytes and be the same length as the
// cipher.Block's block size. Resync determines if the "resynchronization step"
// from RFC 4880, 13.9 step 7 is performed. Different parts of OpenPGP vary on
// this point.
func NewOCFBEncrypter(block cipher.Block, randData []byte, resync OCFBResyncOption) (cipher.Stream, []byte) {
blockSize := block.BlockSize()
if len(randData) != blockSize {
return nil, nil
}
x := &ocfbEncrypter{
b: block,
fre: make([]byte, blockSize),
outUsed: 0,
}
prefix := make([]byte, blockSize+2)
block.Encrypt(x.fre, x.fre)
for i := 0; i < blockSize; i++ {
prefix[i] = randData[i] ^ x.fre[i]
}
block.Encrypt(x.fre, prefix[:blockSize])
prefix[blockSize] = x.fre[0] ^ randData[blockSize-2]
prefix[blockSize+1] = x.fre[1] ^ randData[blockSize-1]
if resync {
block.Encrypt(x.fre, prefix[2:])
} else {
x.fre[0] = prefix[blockSize]
x.fre[1] = prefix[blockSize+1]
x.outUsed = 2
}
return x, prefix
}
func (x *ocfbEncrypter) XORKeyStream(dst, src []byte) {
for i := 0; i < len(src); i++ {
if x.outUsed == len(x.fre) {
x.b.Encrypt(x.fre, x.fre)
x.outUsed = 0
}
x.fre[x.outUsed] ^= src[i]
dst[i] = x.fre[x.outUsed]
x.outUsed++
}
}
type ocfbDecrypter struct {
b cipher.Block
fre []byte
outUsed int
}
// NewOCFBDecrypter returns a cipher.Stream which decrypts data with OpenPGP's
// cipher feedback mode using the given cipher.Block. Prefix must be the first
// blockSize + 2 bytes of the ciphertext, where blockSize is the cipher.Block's
// block size. On successful exit, blockSize+2 bytes of decrypted data are written into
// prefix. Resync determines if the "resynchronization step" from RFC 4880,
// 13.9 step 7 is performed. Different parts of OpenPGP vary on this point.
func NewOCFBDecrypter(block cipher.Block, prefix []byte, resync OCFBResyncOption) cipher.Stream {
blockSize := block.BlockSize()
if len(prefix) != blockSize+2 {
return nil
}
x := &ocfbDecrypter{
b: block,
fre: make([]byte, blockSize),
outUsed: 0,
}
prefixCopy := make([]byte, len(prefix))
copy(prefixCopy, prefix)
block.Encrypt(x.fre, x.fre)
for i := 0; i < blockSize; i++ {
prefixCopy[i] ^= x.fre[i]
}
block.Encrypt(x.fre, prefix[:blockSize])
prefixCopy[blockSize] ^= x.fre[0]
prefixCopy[blockSize+1] ^= x.fre[1]
if resync {
block.Encrypt(x.fre, prefix[2:])
} else {
x.fre[0] = prefix[blockSize]
x.fre[1] = prefix[blockSize+1]
x.outUsed = 2
}
copy(prefix, prefixCopy)
return x
}
func (x *ocfbDecrypter) XORKeyStream(dst, src []byte) {
for i := 0; i < len(src); i++ {
if x.outUsed == len(x.fre) {
x.b.Encrypt(x.fre, x.fre)
x.outUsed = 0
}
c := src[i]
dst[i] = x.fre[x.outUsed] ^ src[i]
x.fre[x.outUsed] = c
x.outUsed++
}
}

73
vendor/github.com/ProtonMail/go-crypto/openpgp/packet/one_pass_signature.go generated vendored Normal file
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// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package packet
import (
"crypto"
"encoding/binary"
"github.com/ProtonMail/go-crypto/openpgp/errors"
"github.com/ProtonMail/go-crypto/openpgp/s2k"
"io"
"strconv"
)
// OnePassSignature represents a one-pass signature packet. See RFC 4880,
// section 5.4.
type OnePassSignature struct {
SigType SignatureType
Hash crypto.Hash
PubKeyAlgo PublicKeyAlgorithm
KeyId uint64
IsLast bool
}
const onePassSignatureVersion = 3
func (ops *OnePassSignature) parse(r io.Reader) (err error) {
var buf [13]byte
_, err = readFull(r, buf[:])
if err != nil {
return
}
if buf[0] != onePassSignatureVersion {
err = errors.UnsupportedError("one-pass-signature packet version " + strconv.Itoa(int(buf[0])))
}
var ok bool
ops.Hash, ok = s2k.HashIdToHash(buf[2])
if !ok {
return errors.UnsupportedError("hash function: " + strconv.Itoa(int(buf[2])))
}
ops.SigType = SignatureType(buf[1])
ops.PubKeyAlgo = PublicKeyAlgorithm(buf[3])
ops.KeyId = binary.BigEndian.Uint64(buf[4:12])
ops.IsLast = buf[12] != 0
return
}
// Serialize marshals the given OnePassSignature to w.
func (ops *OnePassSignature) Serialize(w io.Writer) error {
var buf [13]byte
buf[0] = onePassSignatureVersion
buf[1] = uint8(ops.SigType)
var ok bool
buf[2], ok = s2k.HashToHashId(ops.Hash)
if !ok {
return errors.UnsupportedError("hash type: " + strconv.Itoa(int(ops.Hash)))
}
buf[3] = uint8(ops.PubKeyAlgo)
binary.BigEndian.PutUint64(buf[4:12], ops.KeyId)
if ops.IsLast {
buf[12] = 1
}
if err := serializeHeader(w, packetTypeOnePassSignature, len(buf)); err != nil {
return err
}
_, err := w.Write(buf[:])
return err
}

162
vendor/github.com/ProtonMail/go-crypto/openpgp/packet/opaque.go generated vendored Normal file
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@@ -0,0 +1,162 @@
// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package packet
import (
"bytes"
"io"
"io/ioutil"
"github.com/ProtonMail/go-crypto/openpgp/errors"
)
// OpaquePacket represents an OpenPGP packet as raw, unparsed data. This is
// useful for splitting and storing the original packet contents separately,
// handling unsupported packet types or accessing parts of the packet not yet
// implemented by this package.
type OpaquePacket struct {
// Packet type
Tag uint8
// Reason why the packet was parsed opaquely
Reason error
// Binary contents of the packet data
Contents []byte
}
func (op *OpaquePacket) parse(r io.Reader) (err error) {
op.Contents, err = ioutil.ReadAll(r)
return
}
// Serialize marshals the packet to a writer in its original form, including
// the packet header.
func (op *OpaquePacket) Serialize(w io.Writer) (err error) {
err = serializeHeader(w, packetType(op.Tag), len(op.Contents))
if err == nil {
_, err = w.Write(op.Contents)
}
return
}
// Parse attempts to parse the opaque contents into a structure supported by
// this package. If the packet is not known then the result will be another
// OpaquePacket.
func (op *OpaquePacket) Parse() (p Packet, err error) {
hdr := bytes.NewBuffer(nil)
err = serializeHeader(hdr, packetType(op.Tag), len(op.Contents))
if err != nil {
op.Reason = err
return op, err
}
p, err = Read(io.MultiReader(hdr, bytes.NewBuffer(op.Contents)))
if err != nil {
op.Reason = err
p = op
}
return
}
// OpaqueReader reads OpaquePackets from an io.Reader.
type OpaqueReader struct {
r io.Reader
}
func NewOpaqueReader(r io.Reader) *OpaqueReader {
return &OpaqueReader{r: r}
}
// Read the next OpaquePacket.
func (or *OpaqueReader) Next() (op *OpaquePacket, err error) {
tag, _, contents, err := readHeader(or.r)
if err != nil {
return
}
op = &OpaquePacket{Tag: uint8(tag), Reason: err}
err = op.parse(contents)
if err != nil {
consumeAll(contents)
}
return
}
// OpaqueSubpacket represents an unparsed OpenPGP subpacket,
// as found in signature and user attribute packets.
type OpaqueSubpacket struct {
SubType uint8
Contents []byte
}
// OpaqueSubpackets extracts opaque, unparsed OpenPGP subpackets from
// their byte representation.
func OpaqueSubpackets(contents []byte) (result []*OpaqueSubpacket, err error) {
var (
subHeaderLen int
subPacket *OpaqueSubpacket
)
for len(contents) > 0 {
subHeaderLen, subPacket, err = nextSubpacket(contents)
if err != nil {
break
}
result = append(result, subPacket)
contents = contents[subHeaderLen+len(subPacket.Contents):]
}
return
}
func nextSubpacket(contents []byte) (subHeaderLen int, subPacket *OpaqueSubpacket, err error) {
// RFC 4880, section 5.2.3.1
var subLen uint32
if len(contents) < 1 {
goto Truncated
}
subPacket = &OpaqueSubpacket{}
switch {
case contents[0] < 192:
subHeaderLen = 2 // 1 length byte, 1 subtype byte
if len(contents) < subHeaderLen {
goto Truncated
}
subLen = uint32(contents[0])
contents = contents[1:]
case contents[0] < 255:
subHeaderLen = 3 // 2 length bytes, 1 subtype
if len(contents) < subHeaderLen {
goto Truncated
}
subLen = uint32(contents[0]-192)<<8 + uint32(contents[1]) + 192
contents = contents[2:]
default:
subHeaderLen = 6 // 5 length bytes, 1 subtype
if len(contents) < subHeaderLen {
goto Truncated
}
subLen = uint32(contents[1])<<24 |
uint32(contents[2])<<16 |
uint32(contents[3])<<8 |
uint32(contents[4])
contents = contents[5:]
}
if subLen > uint32(len(contents)) || subLen == 0 {
goto Truncated
}
subPacket.SubType = contents[0]
subPacket.Contents = contents[1:subLen]
return
Truncated:
err = errors.StructuralError("subpacket truncated")
return
}
func (osp *OpaqueSubpacket) Serialize(w io.Writer) (err error) {
buf := make([]byte, 6)
n := serializeSubpacketLength(buf, len(osp.Contents)+1)
buf[n] = osp.SubType
if _, err = w.Write(buf[:n+1]); err != nil {
return
}
_, err = w.Write(osp.Contents)
return
}

539
vendor/github.com/ProtonMail/go-crypto/openpgp/packet/packet.go generated vendored Normal file
View File

@@ -0,0 +1,539 @@
// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package packet implements parsing and serialization of OpenPGP packets, as
// specified in RFC 4880.
package packet // import "github.com/ProtonMail/go-crypto/openpgp/packet"
import (
"bytes"
"crypto/cipher"
"crypto/rsa"
"io"
"github.com/ProtonMail/go-crypto/openpgp/errors"
"github.com/ProtonMail/go-crypto/openpgp/internal/algorithm"
)
// readFull is the same as io.ReadFull except that reading zero bytes returns
// ErrUnexpectedEOF rather than EOF.
func readFull(r io.Reader, buf []byte) (n int, err error) {
n, err = io.ReadFull(r, buf)
if err == io.EOF {
err = io.ErrUnexpectedEOF
}
return
}
// readLength reads an OpenPGP length from r. See RFC 4880, section 4.2.2.
func readLength(r io.Reader) (length int64, isPartial bool, err error) {
var buf [4]byte
_, err = readFull(r, buf[:1])
if err != nil {
return
}
switch {
case buf[0] < 192:
length = int64(buf[0])
case buf[0] < 224:
length = int64(buf[0]-192) << 8
_, err = readFull(r, buf[0:1])
if err != nil {
return
}
length += int64(buf[0]) + 192
case buf[0] < 255:
length = int64(1) << (buf[0] & 0x1f)
isPartial = true
default:
_, err = readFull(r, buf[0:4])
if err != nil {
return
}
length = int64(buf[0])<<24 |
int64(buf[1])<<16 |
int64(buf[2])<<8 |
int64(buf[3])
}
return
}
// partialLengthReader wraps an io.Reader and handles OpenPGP partial lengths.
// The continuation lengths are parsed and removed from the stream and EOF is
// returned at the end of the packet. See RFC 4880, section 4.2.2.4.
type partialLengthReader struct {
r io.Reader
remaining int64
isPartial bool
}
func (r *partialLengthReader) Read(p []byte) (n int, err error) {
for r.remaining == 0 {
if !r.isPartial {
return 0, io.EOF
}
r.remaining, r.isPartial, err = readLength(r.r)
if err != nil {
return 0, err
}
}
toRead := int64(len(p))
if toRead > r.remaining {
toRead = r.remaining
}
n, err = r.r.Read(p[:int(toRead)])
r.remaining -= int64(n)
if n < int(toRead) && err == io.EOF {
err = io.ErrUnexpectedEOF
}
return
}
// partialLengthWriter writes a stream of data using OpenPGP partial lengths.
// See RFC 4880, section 4.2.2.4.
type partialLengthWriter struct {
w io.WriteCloser
buf bytes.Buffer
lengthByte [1]byte
}
func (w *partialLengthWriter) Write(p []byte) (n int, err error) {
bufLen := w.buf.Len()
if bufLen > 512 {
for power := uint(30); ; power-- {
l := 1 << power
if bufLen >= l {
w.lengthByte[0] = 224 + uint8(power)
_, err = w.w.Write(w.lengthByte[:])
if err != nil {
return
}
var m int
m, err = w.w.Write(w.buf.Next(l))
if err != nil {
return
}
if m != l {
return 0, io.ErrShortWrite
}
break
}
}
}
return w.buf.Write(p)
}
func (w *partialLengthWriter) Close() (err error) {
len := w.buf.Len()
err = serializeLength(w.w, len)
if err != nil {
return err
}
_, err = w.buf.WriteTo(w.w)
if err != nil {
return err
}
return w.w.Close()
}
// A spanReader is an io.LimitReader, but it returns ErrUnexpectedEOF if the
// underlying Reader returns EOF before the limit has been reached.
type spanReader struct {
r io.Reader
n int64
}
func (l *spanReader) Read(p []byte) (n int, err error) {
if l.n <= 0 {
return 0, io.EOF
}
if int64(len(p)) > l.n {
p = p[0:l.n]
}
n, err = l.r.Read(p)
l.n -= int64(n)
if l.n > 0 && err == io.EOF {
err = io.ErrUnexpectedEOF
}
return
}
// readHeader parses a packet header and returns an io.Reader which will return
// the contents of the packet. See RFC 4880, section 4.2.
func readHeader(r io.Reader) (tag packetType, length int64, contents io.Reader, err error) {
var buf [4]byte
_, err = io.ReadFull(r, buf[:1])
if err != nil {
return
}
if buf[0]&0x80 == 0 {
err = errors.StructuralError("tag byte does not have MSB set")
return
}
if buf[0]&0x40 == 0 {
// Old format packet
tag = packetType((buf[0] & 0x3f) >> 2)
lengthType := buf[0] & 3
if lengthType == 3 {
length = -1
contents = r
return
}
lengthBytes := 1 << lengthType
_, err = readFull(r, buf[0:lengthBytes])
if err != nil {
return
}
for i := 0; i < lengthBytes; i++ {
length <<= 8
length |= int64(buf[i])
}
contents = &spanReader{r, length}
return
}
// New format packet
tag = packetType(buf[0] & 0x3f)
length, isPartial, err := readLength(r)
if err != nil {
return
}
if isPartial {
contents = &partialLengthReader{
remaining: length,
isPartial: true,
r: r,
}
length = -1
} else {
contents = &spanReader{r, length}
}
return
}
// serializeHeader writes an OpenPGP packet header to w. See RFC 4880, section
// 4.2.
func serializeHeader(w io.Writer, ptype packetType, length int) (err error) {
err = serializeType(w, ptype)
if err != nil {
return
}
return serializeLength(w, length)
}
// serializeType writes an OpenPGP packet type to w. See RFC 4880, section
// 4.2.
func serializeType(w io.Writer, ptype packetType) (err error) {
var buf [1]byte
buf[0] = 0x80 | 0x40 | byte(ptype)
_, err = w.Write(buf[:])
return
}
// serializeLength writes an OpenPGP packet length to w. See RFC 4880, section
// 4.2.2.
func serializeLength(w io.Writer, length int) (err error) {
var buf [5]byte
var n int
if length < 192 {
buf[0] = byte(length)
n = 1
} else if length < 8384 {
length -= 192
buf[0] = 192 + byte(length>>8)
buf[1] = byte(length)
n = 2
} else {
buf[0] = 255
buf[1] = byte(length >> 24)
buf[2] = byte(length >> 16)
buf[3] = byte(length >> 8)
buf[4] = byte(length)
n = 5
}
_, err = w.Write(buf[:n])
return
}
// serializeStreamHeader writes an OpenPGP packet header to w where the
// length of the packet is unknown. It returns a io.WriteCloser which can be
// used to write the contents of the packet. See RFC 4880, section 4.2.
func serializeStreamHeader(w io.WriteCloser, ptype packetType) (out io.WriteCloser, err error) {
err = serializeType(w, ptype)
if err != nil {
return
}
out = &partialLengthWriter{w: w}
return
}
// Packet represents an OpenPGP packet. Users are expected to try casting
// instances of this interface to specific packet types.
type Packet interface {
parse(io.Reader) error
}
// consumeAll reads from the given Reader until error, returning the number of
// bytes read.
func consumeAll(r io.Reader) (n int64, err error) {
var m int
var buf [1024]byte
for {
m, err = r.Read(buf[:])
n += int64(m)
if err == io.EOF {
err = nil
return
}
if err != nil {
return
}
}
}
// packetType represents the numeric ids of the different OpenPGP packet types. See
// http://www.iana.org/assignments/pgp-parameters/pgp-parameters.xhtml#pgp-parameters-2
type packetType uint8
const (
packetTypeEncryptedKey packetType = 1
packetTypeSignature packetType = 2
packetTypeSymmetricKeyEncrypted packetType = 3
packetTypeOnePassSignature packetType = 4
packetTypePrivateKey packetType = 5
packetTypePublicKey packetType = 6
packetTypePrivateSubkey packetType = 7
packetTypeCompressed packetType = 8
packetTypeSymmetricallyEncrypted packetType = 9
packetTypeLiteralData packetType = 11
packetTypeUserId packetType = 13
packetTypePublicSubkey packetType = 14
packetTypeUserAttribute packetType = 17
packetTypeSymmetricallyEncryptedMDC packetType = 18
packetTypeAEADEncrypted packetType = 20
)
// EncryptedDataPacket holds encrypted data. It is currently implemented by
// SymmetricallyEncrypted and AEADEncrypted.
type EncryptedDataPacket interface {
Decrypt(CipherFunction, []byte) (io.ReadCloser, error)
}
// Read reads a single OpenPGP packet from the given io.Reader. If there is an
// error parsing a packet, the whole packet is consumed from the input.
func Read(r io.Reader) (p Packet, err error) {
tag, _, contents, err := readHeader(r)
if err != nil {
return
}
switch tag {
case packetTypeEncryptedKey:
p = new(EncryptedKey)
case packetTypeSignature:
p = new(Signature)
case packetTypeSymmetricKeyEncrypted:
p = new(SymmetricKeyEncrypted)
case packetTypeOnePassSignature:
p = new(OnePassSignature)
case packetTypePrivateKey, packetTypePrivateSubkey:
pk := new(PrivateKey)
if tag == packetTypePrivateSubkey {
pk.IsSubkey = true
}
p = pk
case packetTypePublicKey, packetTypePublicSubkey:
isSubkey := tag == packetTypePublicSubkey
p = &PublicKey{IsSubkey: isSubkey}
case packetTypeCompressed:
p = new(Compressed)
case packetTypeSymmetricallyEncrypted:
p = new(SymmetricallyEncrypted)
case packetTypeLiteralData:
p = new(LiteralData)
case packetTypeUserId:
p = new(UserId)
case packetTypeUserAttribute:
p = new(UserAttribute)
case packetTypeSymmetricallyEncryptedMDC:
se := new(SymmetricallyEncrypted)
se.MDC = true
p = se
case packetTypeAEADEncrypted:
p = new(AEADEncrypted)
default:
err = errors.UnknownPacketTypeError(tag)
}
if p != nil {
err = p.parse(contents)
}
if err != nil {
consumeAll(contents)
}
return
}
// SignatureType represents the different semantic meanings of an OpenPGP
// signature. See RFC 4880, section 5.2.1.
type SignatureType uint8
const (
SigTypeBinary SignatureType = 0x00
SigTypeText = 0x01
SigTypeGenericCert = 0x10
SigTypePersonaCert = 0x11
SigTypeCasualCert = 0x12
SigTypePositiveCert = 0x13
SigTypeSubkeyBinding = 0x18
SigTypePrimaryKeyBinding = 0x19
SigTypeDirectSignature = 0x1F
SigTypeKeyRevocation = 0x20
SigTypeSubkeyRevocation = 0x28
SigTypeCertificationRevocation = 0x30
)
// PublicKeyAlgorithm represents the different public key system specified for
// OpenPGP. See
// http://www.iana.org/assignments/pgp-parameters/pgp-parameters.xhtml#pgp-parameters-12
type PublicKeyAlgorithm uint8
const (
PubKeyAlgoRSA PublicKeyAlgorithm = 1
PubKeyAlgoElGamal PublicKeyAlgorithm = 16
PubKeyAlgoDSA PublicKeyAlgorithm = 17
// RFC 6637, Section 5.
PubKeyAlgoECDH PublicKeyAlgorithm = 18
PubKeyAlgoECDSA PublicKeyAlgorithm = 19
// https://www.ietf.org/archive/id/draft-koch-eddsa-for-openpgp-04.txt
PubKeyAlgoEdDSA PublicKeyAlgorithm = 22
// Deprecated in RFC 4880, Section 13.5. Use key flags instead.
PubKeyAlgoRSAEncryptOnly PublicKeyAlgorithm = 2
PubKeyAlgoRSASignOnly PublicKeyAlgorithm = 3
)
// CanEncrypt returns true if it's possible to encrypt a message to a public
// key of the given type.
func (pka PublicKeyAlgorithm) CanEncrypt() bool {
switch pka {
case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly, PubKeyAlgoElGamal, PubKeyAlgoECDH:
return true
}
return false
}
// CanSign returns true if it's possible for a public key of the given type to
// sign a message.
func (pka PublicKeyAlgorithm) CanSign() bool {
switch pka {
case PubKeyAlgoRSA, PubKeyAlgoRSASignOnly, PubKeyAlgoDSA, PubKeyAlgoECDSA, PubKeyAlgoEdDSA:
return true
}
return false
}
// CipherFunction represents the different block ciphers specified for OpenPGP. See
// http://www.iana.org/assignments/pgp-parameters/pgp-parameters.xhtml#pgp-parameters-13
type CipherFunction algorithm.CipherFunction
const (
Cipher3DES CipherFunction = 2
CipherCAST5 CipherFunction = 3
CipherAES128 CipherFunction = 7
CipherAES192 CipherFunction = 8
CipherAES256 CipherFunction = 9
)
// KeySize returns the key size, in bytes, of cipher.
func (cipher CipherFunction) KeySize() int {
return algorithm.CipherFunction(cipher).KeySize()
}
// blockSize returns the block size, in bytes, of cipher.
func (cipher CipherFunction) blockSize() int {
return algorithm.CipherFunction(cipher).BlockSize()
}
// new returns a fresh instance of the given cipher.
func (cipher CipherFunction) new(key []byte) (block cipher.Block) {
return algorithm.CipherFunction(cipher).New(key)
}
// padToKeySize left-pads a MPI with zeroes to match the length of the
// specified RSA public.
func padToKeySize(pub *rsa.PublicKey, b []byte) []byte {
k := (pub.N.BitLen() + 7) / 8
if len(b) >= k {
return b
}
bb := make([]byte, k)
copy(bb[len(bb)-len(b):], b)
return bb
}
// CompressionAlgo Represents the different compression algorithms
// supported by OpenPGP (except for BZIP2, which is not currently
// supported). See Section 9.3 of RFC 4880.
type CompressionAlgo uint8
const (
CompressionNone CompressionAlgo = 0
CompressionZIP CompressionAlgo = 1
CompressionZLIB CompressionAlgo = 2
)
// AEADMode represents the different Authenticated Encryption with Associated
// Data specified for OpenPGP.
type AEADMode algorithm.AEADMode
const (
AEADModeEAX AEADMode = 1
AEADModeOCB AEADMode = 2
AEADModeExperimentalGCM AEADMode = 100
)
func (mode AEADMode) NonceLength() int {
return algorithm.AEADMode(mode).NonceLength()
}
func (mode AEADMode) TagLength() int {
return algorithm.AEADMode(mode).TagLength()
}
// new returns a fresh instance of the given mode.
func (mode AEADMode) new(block cipher.Block) cipher.AEAD {
return algorithm.AEADMode(mode).New(block)
}
// ReasonForRevocation represents a revocation reason code as per RFC4880
// section 5.2.3.23.
type ReasonForRevocation uint8
const (
NoReason ReasonForRevocation = 0
KeySuperseded ReasonForRevocation = 1
KeyCompromised ReasonForRevocation = 2
KeyRetired ReasonForRevocation = 3
)
// Curve is a mapping to supported ECC curves for key generation.
// See https://www.ietf.org/archive/id/draft-ietf-openpgp-crypto-refresh-06.html#name-curve-specific-wire-formats
type Curve string
const (
Curve25519 Curve = "Curve25519"
Curve448 Curve = "Curve448"
CurveNistP256 Curve = "P256"
CurveNistP384 Curve = "P384"
CurveNistP521 Curve = "P521"
CurveSecP256k1 Curve = "SecP256k1"
CurveBrainpoolP256 Curve = "BrainpoolP256"
CurveBrainpoolP384 Curve = "BrainpoolP384"
CurveBrainpoolP512 Curve = "BrainpoolP512"
)

736
vendor/github.com/ProtonMail/go-crypto/openpgp/packet/private_key.go generated vendored Normal file
View File

@@ -0,0 +1,736 @@
// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package packet
import (
"bytes"
"crypto"
"crypto/cipher"
"crypto/dsa"
"crypto/rand"
"crypto/rsa"
"crypto/sha1"
"io"
"io/ioutil"
"math/big"
"strconv"
"time"
"github.com/ProtonMail/go-crypto/openpgp/ecdh"
"github.com/ProtonMail/go-crypto/openpgp/ecdsa"
"github.com/ProtonMail/go-crypto/openpgp/eddsa"
"github.com/ProtonMail/go-crypto/openpgp/elgamal"
"github.com/ProtonMail/go-crypto/openpgp/errors"
"github.com/ProtonMail/go-crypto/openpgp/internal/encoding"
"github.com/ProtonMail/go-crypto/openpgp/s2k"
)
// PrivateKey represents a possibly encrypted private key. See RFC 4880,
// section 5.5.3.
type PrivateKey struct {
PublicKey
Encrypted bool // if true then the private key is unavailable until Decrypt has been called.
encryptedData []byte
cipher CipherFunction
s2k func(out, in []byte)
// An *{rsa|dsa|elgamal|ecdh|ecdsa|ed25519}.PrivateKey or
// crypto.Signer/crypto.Decrypter (Decryptor RSA only).
PrivateKey interface{}
sha1Checksum bool
iv []byte
// Type of encryption of the S2K packet
// Allowed values are 0 (Not encrypted), 254 (SHA1), or
// 255 (2-byte checksum)
s2kType S2KType
// Full parameters of the S2K packet
s2kParams *s2k.Params
}
//S2KType s2k packet type
type S2KType uint8
const (
// S2KNON unencrypt
S2KNON S2KType = 0
// S2KSHA1 sha1 sum check
S2KSHA1 S2KType = 254
// S2KCHECKSUM sum check
S2KCHECKSUM S2KType = 255
)
func NewRSAPrivateKey(creationTime time.Time, priv *rsa.PrivateKey) *PrivateKey {
pk := new(PrivateKey)
pk.PublicKey = *NewRSAPublicKey(creationTime, &priv.PublicKey)
pk.PrivateKey = priv
return pk
}
func NewDSAPrivateKey(creationTime time.Time, priv *dsa.PrivateKey) *PrivateKey {
pk := new(PrivateKey)
pk.PublicKey = *NewDSAPublicKey(creationTime, &priv.PublicKey)
pk.PrivateKey = priv
return pk
}
func NewElGamalPrivateKey(creationTime time.Time, priv *elgamal.PrivateKey) *PrivateKey {
pk := new(PrivateKey)
pk.PublicKey = *NewElGamalPublicKey(creationTime, &priv.PublicKey)
pk.PrivateKey = priv
return pk
}
func NewECDSAPrivateKey(creationTime time.Time, priv *ecdsa.PrivateKey) *PrivateKey {
pk := new(PrivateKey)
pk.PublicKey = *NewECDSAPublicKey(creationTime, &priv.PublicKey)
pk.PrivateKey = priv
return pk
}
func NewEdDSAPrivateKey(creationTime time.Time, priv *eddsa.PrivateKey) *PrivateKey {
pk := new(PrivateKey)
pk.PublicKey = *NewEdDSAPublicKey(creationTime, &priv.PublicKey)
pk.PrivateKey = priv
return pk
}
func NewECDHPrivateKey(creationTime time.Time, priv *ecdh.PrivateKey) *PrivateKey {
pk := new(PrivateKey)
pk.PublicKey = *NewECDHPublicKey(creationTime, &priv.PublicKey)
pk.PrivateKey = priv
return pk
}
// NewSignerPrivateKey creates a PrivateKey from a crypto.Signer that
// implements RSA, ECDSA or EdDSA.
func NewSignerPrivateKey(creationTime time.Time, signer interface{}) *PrivateKey {
pk := new(PrivateKey)
// In general, the public Keys should be used as pointers. We still
// type-switch on the values, for backwards-compatibility.
switch pubkey := signer.(type) {
case *rsa.PrivateKey:
pk.PublicKey = *NewRSAPublicKey(creationTime, &pubkey.PublicKey)
case rsa.PrivateKey:
pk.PublicKey = *NewRSAPublicKey(creationTime, &pubkey.PublicKey)
case *ecdsa.PrivateKey:
pk.PublicKey = *NewECDSAPublicKey(creationTime, &pubkey.PublicKey)
case ecdsa.PrivateKey:
pk.PublicKey = *NewECDSAPublicKey(creationTime, &pubkey.PublicKey)
case *eddsa.PrivateKey:
pk.PublicKey = *NewEdDSAPublicKey(creationTime, &pubkey.PublicKey)
case eddsa.PrivateKey:
pk.PublicKey = *NewEdDSAPublicKey(creationTime, &pubkey.PublicKey)
default:
panic("openpgp: unknown signer type in NewSignerPrivateKey")
}
pk.PrivateKey = signer
return pk
}
// NewDecrypterPrivateKey creates a PrivateKey from a *{rsa|elgamal|ecdh}.PrivateKey.
func NewDecrypterPrivateKey(creationTime time.Time, decrypter interface{}) *PrivateKey {
pk := new(PrivateKey)
switch priv := decrypter.(type) {
case *rsa.PrivateKey:
pk.PublicKey = *NewRSAPublicKey(creationTime, &priv.PublicKey)
case *elgamal.PrivateKey:
pk.PublicKey = *NewElGamalPublicKey(creationTime, &priv.PublicKey)
case *ecdh.PrivateKey:
pk.PublicKey = *NewECDHPublicKey(creationTime, &priv.PublicKey)
default:
panic("openpgp: unknown decrypter type in NewDecrypterPrivateKey")
}
pk.PrivateKey = decrypter
return pk
}
func (pk *PrivateKey) parse(r io.Reader) (err error) {
err = (&pk.PublicKey).parse(r)
if err != nil {
return
}
v5 := pk.PublicKey.Version == 5
var buf [1]byte
_, err = readFull(r, buf[:])
if err != nil {
return
}
pk.s2kType = S2KType(buf[0])
var optCount [1]byte
if v5 {
if _, err = readFull(r, optCount[:]); err != nil {
return
}
}
switch pk.s2kType {
case S2KNON:
pk.s2k = nil
pk.Encrypted = false
case S2KSHA1, S2KCHECKSUM:
if v5 && pk.s2kType == S2KCHECKSUM {
return errors.StructuralError("wrong s2k identifier for version 5")
}
_, err = readFull(r, buf[:])
if err != nil {
return
}
pk.cipher = CipherFunction(buf[0])
pk.s2kParams, err = s2k.ParseIntoParams(r)
if err != nil {
return
}
if pk.s2kParams.Dummy() {
return
}
pk.s2k, err = pk.s2kParams.Function()
if err != nil {
return
}
pk.Encrypted = true
if pk.s2kType == S2KSHA1 {
pk.sha1Checksum = true
}
default:
return errors.UnsupportedError("deprecated s2k function in private key")
}
if pk.Encrypted {
blockSize := pk.cipher.blockSize()
if blockSize == 0 {
return errors.UnsupportedError("unsupported cipher in private key: " + strconv.Itoa(int(pk.cipher)))
}
pk.iv = make([]byte, blockSize)
_, err = readFull(r, pk.iv)
if err != nil {
return
}
}
var privateKeyData []byte
if v5 {
var n [4]byte /* secret material four octet count */
_, err = readFull(r, n[:])
if err != nil {
return
}
count := uint32(uint32(n[0])<<24 | uint32(n[1])<<16 | uint32(n[2])<<8 | uint32(n[3]))
if !pk.Encrypted {
count = count + 2 /* two octet checksum */
}
privateKeyData = make([]byte, count)
_, err = readFull(r, privateKeyData)
if err != nil {
return
}
} else {
privateKeyData, err = ioutil.ReadAll(r)
if err != nil {
return
}
}
if !pk.Encrypted {
if len(privateKeyData) < 2 {
return errors.StructuralError("truncated private key data")
}
var sum uint16
for i := 0; i < len(privateKeyData)-2; i++ {
sum += uint16(privateKeyData[i])
}
if privateKeyData[len(privateKeyData)-2] != uint8(sum>>8) ||
privateKeyData[len(privateKeyData)-1] != uint8(sum) {
return errors.StructuralError("private key checksum failure")
}
privateKeyData = privateKeyData[:len(privateKeyData)-2]
return pk.parsePrivateKey(privateKeyData)
}
pk.encryptedData = privateKeyData
return
}
// Dummy returns true if the private key is a dummy key. This is a GNU extension.
func (pk *PrivateKey) Dummy() bool {
return pk.s2kParams.Dummy()
}
func mod64kHash(d []byte) uint16 {
var h uint16
for _, b := range d {
h += uint16(b)
}
return h
}
func (pk *PrivateKey) Serialize(w io.Writer) (err error) {
contents := bytes.NewBuffer(nil)
err = pk.PublicKey.serializeWithoutHeaders(contents)
if err != nil {
return
}
if _, err = contents.Write([]byte{uint8(pk.s2kType)}); err != nil {
return
}
optional := bytes.NewBuffer(nil)
if pk.Encrypted || pk.Dummy() {
optional.Write([]byte{uint8(pk.cipher)})
if err := pk.s2kParams.Serialize(optional); err != nil {
return err
}
if pk.Encrypted {
optional.Write(pk.iv)
}
}
if pk.Version == 5 {
contents.Write([]byte{uint8(optional.Len())})
}
io.Copy(contents, optional)
if !pk.Dummy() {
l := 0
var priv []byte
if !pk.Encrypted {
buf := bytes.NewBuffer(nil)
err = pk.serializePrivateKey(buf)
if err != nil {
return err
}
l = buf.Len()
checksum := mod64kHash(buf.Bytes())
buf.Write([]byte{byte(checksum >> 8), byte(checksum)})
priv = buf.Bytes()
} else {
priv, l = pk.encryptedData, len(pk.encryptedData)
}
if pk.Version == 5 {
contents.Write([]byte{byte(l >> 24), byte(l >> 16), byte(l >> 8), byte(l)})
}
contents.Write(priv)
}
ptype := packetTypePrivateKey
if pk.IsSubkey {
ptype = packetTypePrivateSubkey
}
err = serializeHeader(w, ptype, contents.Len())
if err != nil {
return
}
_, err = io.Copy(w, contents)
if err != nil {
return
}
return
}
func serializeRSAPrivateKey(w io.Writer, priv *rsa.PrivateKey) error {
if _, err := w.Write(new(encoding.MPI).SetBig(priv.D).EncodedBytes()); err != nil {
return err
}
if _, err := w.Write(new(encoding.MPI).SetBig(priv.Primes[1]).EncodedBytes()); err != nil {
return err
}
if _, err := w.Write(new(encoding.MPI).SetBig(priv.Primes[0]).EncodedBytes()); err != nil {
return err
}
_, err := w.Write(new(encoding.MPI).SetBig(priv.Precomputed.Qinv).EncodedBytes())
return err
}
func serializeDSAPrivateKey(w io.Writer, priv *dsa.PrivateKey) error {
_, err := w.Write(new(encoding.MPI).SetBig(priv.X).EncodedBytes())
return err
}
func serializeElGamalPrivateKey(w io.Writer, priv *elgamal.PrivateKey) error {
_, err := w.Write(new(encoding.MPI).SetBig(priv.X).EncodedBytes())
return err
}
func serializeECDSAPrivateKey(w io.Writer, priv *ecdsa.PrivateKey) error {
_, err := w.Write(encoding.NewMPI(priv.MarshalIntegerSecret()).EncodedBytes())
return err
}
func serializeEdDSAPrivateKey(w io.Writer, priv *eddsa.PrivateKey) error {
_, err := w.Write(encoding.NewMPI(priv.MarshalByteSecret()).EncodedBytes())
return err
}
func serializeECDHPrivateKey(w io.Writer, priv *ecdh.PrivateKey) error {
_, err := w.Write(encoding.NewMPI(priv.MarshalByteSecret()).EncodedBytes())
return err
}
// Decrypt decrypts an encrypted private key using a passphrase.
func (pk *PrivateKey) Decrypt(passphrase []byte) error {
if pk.Dummy() {
return errors.ErrDummyPrivateKey("dummy key found")
}
if !pk.Encrypted {
return nil
}
key := make([]byte, pk.cipher.KeySize())
pk.s2k(key, passphrase)
block := pk.cipher.new(key)
cfb := cipher.NewCFBDecrypter(block, pk.iv)
data := make([]byte, len(pk.encryptedData))
cfb.XORKeyStream(data, pk.encryptedData)
if pk.sha1Checksum {
if len(data) < sha1.Size {
return errors.StructuralError("truncated private key data")
}
h := sha1.New()
h.Write(data[:len(data)-sha1.Size])
sum := h.Sum(nil)
if !bytes.Equal(sum, data[len(data)-sha1.Size:]) {
return errors.StructuralError("private key checksum failure")
}
data = data[:len(data)-sha1.Size]
} else {
if len(data) < 2 {
return errors.StructuralError("truncated private key data")
}
var sum uint16
for i := 0; i < len(data)-2; i++ {
sum += uint16(data[i])
}
if data[len(data)-2] != uint8(sum>>8) ||
data[len(data)-1] != uint8(sum) {
return errors.StructuralError("private key checksum failure")
}
data = data[:len(data)-2]
}
err := pk.parsePrivateKey(data)
if _, ok := err.(errors.KeyInvalidError); ok {
return errors.KeyInvalidError("invalid key parameters")
}
if err != nil {
return err
}
// Mark key as unencrypted
pk.s2kType = S2KNON
pk.s2k = nil
pk.Encrypted = false
pk.encryptedData = nil
return nil
}
// Encrypt encrypts an unencrypted private key using a passphrase.
func (pk *PrivateKey) Encrypt(passphrase []byte) error {
priv := bytes.NewBuffer(nil)
err := pk.serializePrivateKey(priv)
if err != nil {
return err
}
//Default config of private key encryption
pk.cipher = CipherAES256
s2kConfig := &s2k.Config{
S2KMode: 3, //Iterated
S2KCount: 65536,
Hash: crypto.SHA256,
}
pk.s2kParams, err = s2k.Generate(rand.Reader, s2kConfig)
if err != nil {
return err
}
privateKeyBytes := priv.Bytes()
key := make([]byte, pk.cipher.KeySize())
pk.sha1Checksum = true
pk.s2k, err = pk.s2kParams.Function()
if err != nil {
return err
}
pk.s2k(key, passphrase)
block := pk.cipher.new(key)
pk.iv = make([]byte, pk.cipher.blockSize())
_, err = rand.Read(pk.iv)
if err != nil {
return err
}
cfb := cipher.NewCFBEncrypter(block, pk.iv)
if pk.sha1Checksum {
pk.s2kType = S2KSHA1
h := sha1.New()
h.Write(privateKeyBytes)
sum := h.Sum(nil)
privateKeyBytes = append(privateKeyBytes, sum...)
} else {
pk.s2kType = S2KCHECKSUM
var sum uint16
for _, b := range privateKeyBytes {
sum += uint16(b)
}
priv.Write([]byte{uint8(sum >> 8), uint8(sum)})
}
pk.encryptedData = make([]byte, len(privateKeyBytes))
cfb.XORKeyStream(pk.encryptedData, privateKeyBytes)
pk.Encrypted = true
pk.PrivateKey = nil
return err
}
func (pk *PrivateKey) serializePrivateKey(w io.Writer) (err error) {
switch priv := pk.PrivateKey.(type) {
case *rsa.PrivateKey:
err = serializeRSAPrivateKey(w, priv)
case *dsa.PrivateKey:
err = serializeDSAPrivateKey(w, priv)
case *elgamal.PrivateKey:
err = serializeElGamalPrivateKey(w, priv)
case *ecdsa.PrivateKey:
err = serializeECDSAPrivateKey(w, priv)
case *eddsa.PrivateKey:
err = serializeEdDSAPrivateKey(w, priv)
case *ecdh.PrivateKey:
err = serializeECDHPrivateKey(w, priv)
default:
err = errors.InvalidArgumentError("unknown private key type")
}
return
}
func (pk *PrivateKey) parsePrivateKey(data []byte) (err error) {
switch pk.PublicKey.PubKeyAlgo {
case PubKeyAlgoRSA, PubKeyAlgoRSASignOnly, PubKeyAlgoRSAEncryptOnly:
return pk.parseRSAPrivateKey(data)
case PubKeyAlgoDSA:
return pk.parseDSAPrivateKey(data)
case PubKeyAlgoElGamal:
return pk.parseElGamalPrivateKey(data)
case PubKeyAlgoECDSA:
return pk.parseECDSAPrivateKey(data)
case PubKeyAlgoECDH:
return pk.parseECDHPrivateKey(data)
case PubKeyAlgoEdDSA:
return pk.parseEdDSAPrivateKey(data)
}
panic("impossible")
}
func (pk *PrivateKey) parseRSAPrivateKey(data []byte) (err error) {
rsaPub := pk.PublicKey.PublicKey.(*rsa.PublicKey)
rsaPriv := new(rsa.PrivateKey)
rsaPriv.PublicKey = *rsaPub
buf := bytes.NewBuffer(data)
d := new(encoding.MPI)
if _, err := d.ReadFrom(buf); err != nil {
return err
}
p := new(encoding.MPI)
if _, err := p.ReadFrom(buf); err != nil {
return err
}
q := new(encoding.MPI)
if _, err := q.ReadFrom(buf); err != nil {
return err
}
rsaPriv.D = new(big.Int).SetBytes(d.Bytes())
rsaPriv.Primes = make([]*big.Int, 2)
rsaPriv.Primes[0] = new(big.Int).SetBytes(p.Bytes())
rsaPriv.Primes[1] = new(big.Int).SetBytes(q.Bytes())
if err := rsaPriv.Validate(); err != nil {
return errors.KeyInvalidError(err.Error())
}
rsaPriv.Precompute()
pk.PrivateKey = rsaPriv
return nil
}
func (pk *PrivateKey) parseDSAPrivateKey(data []byte) (err error) {
dsaPub := pk.PublicKey.PublicKey.(*dsa.PublicKey)
dsaPriv := new(dsa.PrivateKey)
dsaPriv.PublicKey = *dsaPub
buf := bytes.NewBuffer(data)
x := new(encoding.MPI)
if _, err := x.ReadFrom(buf); err != nil {
return err
}
dsaPriv.X = new(big.Int).SetBytes(x.Bytes())
if err := validateDSAParameters(dsaPriv); err != nil {
return err
}
pk.PrivateKey = dsaPriv
return nil
}
func (pk *PrivateKey) parseElGamalPrivateKey(data []byte) (err error) {
pub := pk.PublicKey.PublicKey.(*elgamal.PublicKey)
priv := new(elgamal.PrivateKey)
priv.PublicKey = *pub
buf := bytes.NewBuffer(data)
x := new(encoding.MPI)
if _, err := x.ReadFrom(buf); err != nil {
return err
}
priv.X = new(big.Int).SetBytes(x.Bytes())
if err := validateElGamalParameters(priv); err != nil {
return err
}
pk.PrivateKey = priv
return nil
}
func (pk *PrivateKey) parseECDSAPrivateKey(data []byte) (err error) {
ecdsaPub := pk.PublicKey.PublicKey.(*ecdsa.PublicKey)
ecdsaPriv := ecdsa.NewPrivateKey(*ecdsaPub)
buf := bytes.NewBuffer(data)
d := new(encoding.MPI)
if _, err := d.ReadFrom(buf); err != nil {
return err
}
if err := ecdsaPriv.UnmarshalIntegerSecret(d.Bytes()); err != nil {
return err
}
if err := ecdsa.Validate(ecdsaPriv); err != nil {
return err
}
pk.PrivateKey = ecdsaPriv
return nil
}
func (pk *PrivateKey) parseECDHPrivateKey(data []byte) (err error) {
ecdhPub := pk.PublicKey.PublicKey.(*ecdh.PublicKey)
ecdhPriv := ecdh.NewPrivateKey(*ecdhPub)
buf := bytes.NewBuffer(data)
d := new(encoding.MPI)
if _, err := d.ReadFrom(buf); err != nil {
return err
}
if err := ecdhPriv.UnmarshalByteSecret(d.Bytes()); err != nil {
return err
}
if err := ecdh.Validate(ecdhPriv); err != nil {
return err
}
pk.PrivateKey = ecdhPriv
return nil
}
func (pk *PrivateKey) parseEdDSAPrivateKey(data []byte) (err error) {
eddsaPub := pk.PublicKey.PublicKey.(*eddsa.PublicKey)
eddsaPriv := eddsa.NewPrivateKey(*eddsaPub)
eddsaPriv.PublicKey = *eddsaPub
buf := bytes.NewBuffer(data)
d := new(encoding.MPI)
if _, err := d.ReadFrom(buf); err != nil {
return err
}
if err = eddsaPriv.UnmarshalByteSecret(d.Bytes()); err != nil {
return err
}
if err := eddsa.Validate(eddsaPriv); err != nil {
return err
}
pk.PrivateKey = eddsaPriv
return nil
}
func validateDSAParameters(priv *dsa.PrivateKey) error {
p := priv.P // group prime
q := priv.Q // subgroup order
g := priv.G // g has order q mod p
x := priv.X // secret
y := priv.Y // y == g**x mod p
one := big.NewInt(1)
// expect g, y >= 2 and g < p
if g.Cmp(one) <= 0 || y.Cmp(one) <= 0 || g.Cmp(p) > 0 {
return errors.KeyInvalidError("dsa: invalid group")
}
// expect p > q
if p.Cmp(q) <= 0 {
return errors.KeyInvalidError("dsa: invalid group prime")
}
// q should be large enough and divide p-1
pSub1 := new(big.Int).Sub(p, one)
if q.BitLen() < 150 || new(big.Int).Mod(pSub1, q).Cmp(big.NewInt(0)) != 0 {
return errors.KeyInvalidError("dsa: invalid order")
}
// confirm that g has order q mod p
if !q.ProbablyPrime(32) || new(big.Int).Exp(g, q, p).Cmp(one) != 0 {
return errors.KeyInvalidError("dsa: invalid order")
}
// check y
if new(big.Int).Exp(g, x, p).Cmp(y) != 0 {
return errors.KeyInvalidError("dsa: mismatching values")
}
return nil
}
func validateElGamalParameters(priv *elgamal.PrivateKey) error {
p := priv.P // group prime
g := priv.G // g has order p-1 mod p
x := priv.X // secret
y := priv.Y // y == g**x mod p
one := big.NewInt(1)
// Expect g, y >= 2 and g < p
if g.Cmp(one) <= 0 || y.Cmp(one) <= 0 || g.Cmp(p) > 0 {
return errors.KeyInvalidError("elgamal: invalid group")
}
if p.BitLen() < 1024 {
return errors.KeyInvalidError("elgamal: group order too small")
}
pSub1 := new(big.Int).Sub(p, one)
if new(big.Int).Exp(g, pSub1, p).Cmp(one) != 0 {
return errors.KeyInvalidError("elgamal: invalid group")
}
// Since p-1 is not prime, g might have a smaller order that divides p-1.
// We cannot confirm the exact order of g, but we make sure it is not too small.
gExpI := new(big.Int).Set(g)
i := 1
threshold := 2 << 17 // we want order > threshold
for i < threshold {
i++ // we check every order to make sure key validation is not easily bypassed by guessing y'
gExpI.Mod(new(big.Int).Mul(gExpI, g), p)
if gExpI.Cmp(one) == 0 {
return errors.KeyInvalidError("elgamal: order too small")
}
}
// Check y
if new(big.Int).Exp(g, x, p).Cmp(y) != 0 {
return errors.KeyInvalidError("elgamal: mismatching values")
}
return nil
}

12
vendor/github.com/ProtonMail/go-crypto/openpgp/packet/private_key_test_data.go generated vendored Normal file
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package packet
// Generated with `gpg --export-secret-keys "Test Key 2"`
const privKeyRSAHex = "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"
// Generated by `gpg --export-secret-keys` followed by a manual extraction of
// the ElGamal subkey from the packets.
const privKeyElGamalHex = "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"
// pkcs1PrivKeyHex is a PKCS#1, RSA private key.
// Generated by `openssl genrsa 1024 | openssl rsa -outform DER | xxd -p`
const pkcs1PrivKeyHex = "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"

802
vendor/github.com/ProtonMail/go-crypto/openpgp/packet/public_key.go generated vendored Normal file
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@@ -0,0 +1,802 @@
// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package packet
import (
"crypto"
"crypto/dsa"
"crypto/rsa"
"crypto/sha1"
"crypto/sha256"
_ "crypto/sha512"
"encoding/binary"
"fmt"
"hash"
"io"
"math/big"
"strconv"
"time"
"github.com/ProtonMail/go-crypto/openpgp/ecdh"
"github.com/ProtonMail/go-crypto/openpgp/ecdsa"
"github.com/ProtonMail/go-crypto/openpgp/eddsa"
"github.com/ProtonMail/go-crypto/openpgp/elgamal"
"github.com/ProtonMail/go-crypto/openpgp/errors"
"github.com/ProtonMail/go-crypto/openpgp/internal/algorithm"
"github.com/ProtonMail/go-crypto/openpgp/internal/ecc"
"github.com/ProtonMail/go-crypto/openpgp/internal/encoding"
)
type kdfHashFunction byte
type kdfAlgorithm byte
// PublicKey represents an OpenPGP public key. See RFC 4880, section 5.5.2.
type PublicKey struct {
Version int
CreationTime time.Time
PubKeyAlgo PublicKeyAlgorithm
PublicKey interface{} // *rsa.PublicKey, *dsa.PublicKey, *ecdsa.PublicKey or *eddsa.PublicKey
Fingerprint []byte
KeyId uint64
IsSubkey bool
// RFC 4880 fields
n, e, p, q, g, y encoding.Field
// RFC 6637 fields
// oid contains the OID byte sequence identifying the elliptic curve used
oid encoding.Field
// kdf stores key derivation function parameters
// used for ECDH encryption. See RFC 6637, Section 9.
kdf encoding.Field
}
// UpgradeToV5 updates the version of the key to v5, and updates all necessary
// fields.
func (pk *PublicKey) UpgradeToV5() {
pk.Version = 5
pk.setFingerprintAndKeyId()
}
// signingKey provides a convenient abstraction over signature verification
// for v3 and v4 public keys.
type signingKey interface {
SerializeForHash(io.Writer) error
SerializeSignaturePrefix(io.Writer)
serializeWithoutHeaders(io.Writer) error
}
// NewRSAPublicKey returns a PublicKey that wraps the given rsa.PublicKey.
func NewRSAPublicKey(creationTime time.Time, pub *rsa.PublicKey) *PublicKey {
pk := &PublicKey{
Version: 4,
CreationTime: creationTime,
PubKeyAlgo: PubKeyAlgoRSA,
PublicKey: pub,
n: new(encoding.MPI).SetBig(pub.N),
e: new(encoding.MPI).SetBig(big.NewInt(int64(pub.E))),
}
pk.setFingerprintAndKeyId()
return pk
}
// NewDSAPublicKey returns a PublicKey that wraps the given dsa.PublicKey.
func NewDSAPublicKey(creationTime time.Time, pub *dsa.PublicKey) *PublicKey {
pk := &PublicKey{
Version: 4,
CreationTime: creationTime,
PubKeyAlgo: PubKeyAlgoDSA,
PublicKey: pub,
p: new(encoding.MPI).SetBig(pub.P),
q: new(encoding.MPI).SetBig(pub.Q),
g: new(encoding.MPI).SetBig(pub.G),
y: new(encoding.MPI).SetBig(pub.Y),
}
pk.setFingerprintAndKeyId()
return pk
}
// NewElGamalPublicKey returns a PublicKey that wraps the given elgamal.PublicKey.
func NewElGamalPublicKey(creationTime time.Time, pub *elgamal.PublicKey) *PublicKey {
pk := &PublicKey{
Version: 4,
CreationTime: creationTime,
PubKeyAlgo: PubKeyAlgoElGamal,
PublicKey: pub,
p: new(encoding.MPI).SetBig(pub.P),
g: new(encoding.MPI).SetBig(pub.G),
y: new(encoding.MPI).SetBig(pub.Y),
}
pk.setFingerprintAndKeyId()
return pk
}
func NewECDSAPublicKey(creationTime time.Time, pub *ecdsa.PublicKey) *PublicKey {
pk := &PublicKey{
Version: 4,
CreationTime: creationTime,
PubKeyAlgo: PubKeyAlgoECDSA,
PublicKey: pub,
p: encoding.NewMPI(pub.MarshalPoint()),
}
curveInfo := ecc.FindByCurve(pub.GetCurve())
if curveInfo == nil {
panic("unknown elliptic curve")
}
pk.oid = curveInfo.Oid
pk.setFingerprintAndKeyId()
return pk
}
func NewECDHPublicKey(creationTime time.Time, pub *ecdh.PublicKey) *PublicKey {
var pk *PublicKey
var kdf = encoding.NewOID([]byte{0x1, pub.Hash.Id(), pub.Cipher.Id()})
pk = &PublicKey{
Version: 4,
CreationTime: creationTime,
PubKeyAlgo: PubKeyAlgoECDH,
PublicKey: pub,
p: encoding.NewMPI(pub.MarshalPoint()),
kdf: kdf,
}
curveInfo := ecc.FindByCurve(pub.GetCurve())
if curveInfo == nil {
panic("unknown elliptic curve")
}
pk.oid = curveInfo.Oid
pk.setFingerprintAndKeyId()
return pk
}
func NewEdDSAPublicKey(creationTime time.Time, pub *eddsa.PublicKey) *PublicKey {
curveInfo := ecc.FindByCurve(pub.GetCurve())
pk := &PublicKey{
Version: 4,
CreationTime: creationTime,
PubKeyAlgo: PubKeyAlgoEdDSA,
PublicKey: pub,
oid: curveInfo.Oid,
// Native point format, see draft-koch-eddsa-for-openpgp-04, Appendix B
p: encoding.NewMPI(pub.MarshalPoint()),
}
pk.setFingerprintAndKeyId()
return pk
}
func (pk *PublicKey) parse(r io.Reader) (err error) {
// RFC 4880, section 5.5.2
var buf [6]byte
_, err = readFull(r, buf[:])
if err != nil {
return
}
if buf[0] != 4 && buf[0] != 5 {
return errors.UnsupportedError("public key version " + strconv.Itoa(int(buf[0])))
}
pk.Version = int(buf[0])
if pk.Version == 5 {
var n [4]byte
_, err = readFull(r, n[:])
if err != nil {
return
}
}
pk.CreationTime = time.Unix(int64(uint32(buf[1])<<24|uint32(buf[2])<<16|uint32(buf[3])<<8|uint32(buf[4])), 0)
pk.PubKeyAlgo = PublicKeyAlgorithm(buf[5])
switch pk.PubKeyAlgo {
case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly, PubKeyAlgoRSASignOnly:
err = pk.parseRSA(r)
case PubKeyAlgoDSA:
err = pk.parseDSA(r)
case PubKeyAlgoElGamal:
err = pk.parseElGamal(r)
case PubKeyAlgoECDSA:
err = pk.parseECDSA(r)
case PubKeyAlgoECDH:
err = pk.parseECDH(r)
case PubKeyAlgoEdDSA:
err = pk.parseEdDSA(r)
default:
err = errors.UnsupportedError("public key type: " + strconv.Itoa(int(pk.PubKeyAlgo)))
}
if err != nil {
return
}
pk.setFingerprintAndKeyId()
return
}
func (pk *PublicKey) setFingerprintAndKeyId() {
// RFC 4880, section 12.2
if pk.Version == 5 {
fingerprint := sha256.New()
pk.SerializeForHash(fingerprint)
pk.Fingerprint = make([]byte, 32)
copy(pk.Fingerprint, fingerprint.Sum(nil))
pk.KeyId = binary.BigEndian.Uint64(pk.Fingerprint[:8])
} else {
fingerprint := sha1.New()
pk.SerializeForHash(fingerprint)
pk.Fingerprint = make([]byte, 20)
copy(pk.Fingerprint, fingerprint.Sum(nil))
pk.KeyId = binary.BigEndian.Uint64(pk.Fingerprint[12:20])
}
}
// parseRSA parses RSA public key material from the given Reader. See RFC 4880,
// section 5.5.2.
func (pk *PublicKey) parseRSA(r io.Reader) (err error) {
pk.n = new(encoding.MPI)
if _, err = pk.n.ReadFrom(r); err != nil {
return
}
pk.e = new(encoding.MPI)
if _, err = pk.e.ReadFrom(r); err != nil {
return
}
if len(pk.e.Bytes()) > 3 {
err = errors.UnsupportedError("large public exponent")
return
}
rsa := &rsa.PublicKey{
N: new(big.Int).SetBytes(pk.n.Bytes()),
E: 0,
}
for i := 0; i < len(pk.e.Bytes()); i++ {
rsa.E <<= 8
rsa.E |= int(pk.e.Bytes()[i])
}
pk.PublicKey = rsa
return
}
// parseDSA parses DSA public key material from the given Reader. See RFC 4880,
// section 5.5.2.
func (pk *PublicKey) parseDSA(r io.Reader) (err error) {
pk.p = new(encoding.MPI)
if _, err = pk.p.ReadFrom(r); err != nil {
return
}
pk.q = new(encoding.MPI)
if _, err = pk.q.ReadFrom(r); err != nil {
return
}
pk.g = new(encoding.MPI)
if _, err = pk.g.ReadFrom(r); err != nil {
return
}
pk.y = new(encoding.MPI)
if _, err = pk.y.ReadFrom(r); err != nil {
return
}
dsa := new(dsa.PublicKey)
dsa.P = new(big.Int).SetBytes(pk.p.Bytes())
dsa.Q = new(big.Int).SetBytes(pk.q.Bytes())
dsa.G = new(big.Int).SetBytes(pk.g.Bytes())
dsa.Y = new(big.Int).SetBytes(pk.y.Bytes())
pk.PublicKey = dsa
return
}
// parseElGamal parses ElGamal public key material from the given Reader. See
// RFC 4880, section 5.5.2.
func (pk *PublicKey) parseElGamal(r io.Reader) (err error) {
pk.p = new(encoding.MPI)
if _, err = pk.p.ReadFrom(r); err != nil {
return
}
pk.g = new(encoding.MPI)
if _, err = pk.g.ReadFrom(r); err != nil {
return
}
pk.y = new(encoding.MPI)
if _, err = pk.y.ReadFrom(r); err != nil {
return
}
elgamal := new(elgamal.PublicKey)
elgamal.P = new(big.Int).SetBytes(pk.p.Bytes())
elgamal.G = new(big.Int).SetBytes(pk.g.Bytes())
elgamal.Y = new(big.Int).SetBytes(pk.y.Bytes())
pk.PublicKey = elgamal
return
}
// parseECDSA parses ECDSA public key material from the given Reader. See
// RFC 6637, Section 9.
func (pk *PublicKey) parseECDSA(r io.Reader) (err error) {
pk.oid = new(encoding.OID)
if _, err = pk.oid.ReadFrom(r); err != nil {
return
}
pk.p = new(encoding.MPI)
if _, err = pk.p.ReadFrom(r); err != nil {
return
}
curveInfo := ecc.FindByOid(pk.oid)
if curveInfo == nil {
return errors.UnsupportedError(fmt.Sprintf("unknown oid: %x", pk.oid))
}
c, ok := curveInfo.Curve.(ecc.ECDSACurve)
if !ok {
return errors.UnsupportedError(fmt.Sprintf("unsupported oid: %x", pk.oid))
}
ecdsaKey := ecdsa.NewPublicKey(c)
err = ecdsaKey.UnmarshalPoint(pk.p.Bytes())
pk.PublicKey = ecdsaKey
return
}
// parseECDH parses ECDH public key material from the given Reader. See
// RFC 6637, Section 9.
func (pk *PublicKey) parseECDH(r io.Reader) (err error) {
pk.oid = new(encoding.OID)
if _, err = pk.oid.ReadFrom(r); err != nil {
return
}
pk.p = new(encoding.MPI)
if _, err = pk.p.ReadFrom(r); err != nil {
return
}
pk.kdf = new(encoding.OID)
if _, err = pk.kdf.ReadFrom(r); err != nil {
return
}
curveInfo := ecc.FindByOid(pk.oid)
if curveInfo == nil {
return errors.UnsupportedError(fmt.Sprintf("unknown oid: %x", pk.oid))
}
c, ok := curveInfo.Curve.(ecc.ECDHCurve)
if !ok {
return errors.UnsupportedError(fmt.Sprintf("unsupported oid: %x", pk.oid))
}
if kdfLen := len(pk.kdf.Bytes()); kdfLen < 3 {
return errors.UnsupportedError("unsupported ECDH KDF length: " + strconv.Itoa(kdfLen))
}
if reserved := pk.kdf.Bytes()[0]; reserved != 0x01 {
return errors.UnsupportedError("unsupported KDF reserved field: " + strconv.Itoa(int(reserved)))
}
kdfHash, ok := algorithm.HashById[pk.kdf.Bytes()[1]]
if !ok {
return errors.UnsupportedError("unsupported ECDH KDF hash: " + strconv.Itoa(int(pk.kdf.Bytes()[1])))
}
kdfCipher, ok := algorithm.CipherById[pk.kdf.Bytes()[2]]
if !ok {
return errors.UnsupportedError("unsupported ECDH KDF cipher: " + strconv.Itoa(int(pk.kdf.Bytes()[2])))
}
ecdhKey := ecdh.NewPublicKey(c, kdfHash, kdfCipher)
err = ecdhKey.UnmarshalPoint(pk.p.Bytes())
pk.PublicKey = ecdhKey
return
}
func (pk *PublicKey) parseEdDSA(r io.Reader) (err error) {
pk.oid = new(encoding.OID)
if _, err = pk.oid.ReadFrom(r); err != nil {
return
}
curveInfo := ecc.FindByOid(pk.oid)
if curveInfo == nil {
return errors.UnsupportedError(fmt.Sprintf("unknown oid: %x", pk.oid))
}
c, ok := curveInfo.Curve.(ecc.EdDSACurve)
if !ok {
return errors.UnsupportedError(fmt.Sprintf("unsupported oid: %x", pk.oid))
}
pk.p = new(encoding.MPI)
if _, err = pk.p.ReadFrom(r); err != nil {
return
}
pub := eddsa.NewPublicKey(c)
switch flag := pk.p.Bytes()[0]; flag {
case 0x04:
// TODO: see _grcy_ecc_eddsa_ensure_compact in grcypt
return errors.UnsupportedError("unsupported EdDSA compression: " + strconv.Itoa(int(flag)))
case 0x40:
err = pub.UnmarshalPoint(pk.p.Bytes())
default:
return errors.UnsupportedError("unsupported EdDSA compression: " + strconv.Itoa(int(flag)))
}
pk.PublicKey = pub
return
}
// SerializeForHash serializes the PublicKey to w with the special packet
// header format needed for hashing.
func (pk *PublicKey) SerializeForHash(w io.Writer) error {
pk.SerializeSignaturePrefix(w)
return pk.serializeWithoutHeaders(w)
}
// SerializeSignaturePrefix writes the prefix for this public key to the given Writer.
// The prefix is used when calculating a signature over this public key. See
// RFC 4880, section 5.2.4.
func (pk *PublicKey) SerializeSignaturePrefix(w io.Writer) {
var pLength = pk.algorithmSpecificByteCount()
if pk.Version == 5 {
pLength += 10 // version, timestamp (4), algorithm, key octet count (4).
w.Write([]byte{
0x9A,
byte(pLength >> 24),
byte(pLength >> 16),
byte(pLength >> 8),
byte(pLength),
})
return
}
pLength += 6
w.Write([]byte{0x99, byte(pLength >> 8), byte(pLength)})
}
func (pk *PublicKey) Serialize(w io.Writer) (err error) {
length := 6 // 6 byte header
length += pk.algorithmSpecificByteCount()
if pk.Version == 5 {
length += 4 // octet key count
}
packetType := packetTypePublicKey
if pk.IsSubkey {
packetType = packetTypePublicSubkey
}
err = serializeHeader(w, packetType, length)
if err != nil {
return
}
return pk.serializeWithoutHeaders(w)
}
func (pk *PublicKey) algorithmSpecificByteCount() int {
length := 0
switch pk.PubKeyAlgo {
case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly, PubKeyAlgoRSASignOnly:
length += int(pk.n.EncodedLength())
length += int(pk.e.EncodedLength())
case PubKeyAlgoDSA:
length += int(pk.p.EncodedLength())
length += int(pk.q.EncodedLength())
length += int(pk.g.EncodedLength())
length += int(pk.y.EncodedLength())
case PubKeyAlgoElGamal:
length += int(pk.p.EncodedLength())
length += int(pk.g.EncodedLength())
length += int(pk.y.EncodedLength())
case PubKeyAlgoECDSA:
length += int(pk.oid.EncodedLength())
length += int(pk.p.EncodedLength())
case PubKeyAlgoECDH:
length += int(pk.oid.EncodedLength())
length += int(pk.p.EncodedLength())
length += int(pk.kdf.EncodedLength())
case PubKeyAlgoEdDSA:
length += int(pk.oid.EncodedLength())
length += int(pk.p.EncodedLength())
default:
panic("unknown public key algorithm")
}
return length
}
// serializeWithoutHeaders marshals the PublicKey to w in the form of an
// OpenPGP public key packet, not including the packet header.
func (pk *PublicKey) serializeWithoutHeaders(w io.Writer) (err error) {
t := uint32(pk.CreationTime.Unix())
if _, err = w.Write([]byte{
byte(pk.Version),
byte(t >> 24), byte(t >> 16), byte(t >> 8), byte(t),
byte(pk.PubKeyAlgo),
}); err != nil {
return
}
if pk.Version == 5 {
n := pk.algorithmSpecificByteCount()
if _, err = w.Write([]byte{
byte(n >> 24), byte(n >> 16), byte(n >> 8), byte(n),
}); err != nil {
return
}
}
switch pk.PubKeyAlgo {
case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly, PubKeyAlgoRSASignOnly:
if _, err = w.Write(pk.n.EncodedBytes()); err != nil {
return
}
_, err = w.Write(pk.e.EncodedBytes())
return
case PubKeyAlgoDSA:
if _, err = w.Write(pk.p.EncodedBytes()); err != nil {
return
}
if _, err = w.Write(pk.q.EncodedBytes()); err != nil {
return
}
if _, err = w.Write(pk.g.EncodedBytes()); err != nil {
return
}
_, err = w.Write(pk.y.EncodedBytes())
return
case PubKeyAlgoElGamal:
if _, err = w.Write(pk.p.EncodedBytes()); err != nil {
return
}
if _, err = w.Write(pk.g.EncodedBytes()); err != nil {
return
}
_, err = w.Write(pk.y.EncodedBytes())
return
case PubKeyAlgoECDSA:
if _, err = w.Write(pk.oid.EncodedBytes()); err != nil {
return
}
_, err = w.Write(pk.p.EncodedBytes())
return
case PubKeyAlgoECDH:
if _, err = w.Write(pk.oid.EncodedBytes()); err != nil {
return
}
if _, err = w.Write(pk.p.EncodedBytes()); err != nil {
return
}
_, err = w.Write(pk.kdf.EncodedBytes())
return
case PubKeyAlgoEdDSA:
if _, err = w.Write(pk.oid.EncodedBytes()); err != nil {
return
}
_, err = w.Write(pk.p.EncodedBytes())
return
}
return errors.InvalidArgumentError("bad public-key algorithm")
}
// CanSign returns true iff this public key can generate signatures
func (pk *PublicKey) CanSign() bool {
return pk.PubKeyAlgo != PubKeyAlgoRSAEncryptOnly && pk.PubKeyAlgo != PubKeyAlgoElGamal && pk.PubKeyAlgo != PubKeyAlgoECDH
}
// VerifySignature returns nil iff sig is a valid signature, made by this
// public key, of the data hashed into signed. signed is mutated by this call.
func (pk *PublicKey) VerifySignature(signed hash.Hash, sig *Signature) (err error) {
if !pk.CanSign() {
return errors.InvalidArgumentError("public key cannot generate signatures")
}
if sig.Version == 5 && (sig.SigType == 0x00 || sig.SigType == 0x01) {
sig.AddMetadataToHashSuffix()
}
signed.Write(sig.HashSuffix)
hashBytes := signed.Sum(nil)
if hashBytes[0] != sig.HashTag[0] || hashBytes[1] != sig.HashTag[1] {
return errors.SignatureError("hash tag doesn't match")
}
if pk.PubKeyAlgo != sig.PubKeyAlgo {
return errors.InvalidArgumentError("public key and signature use different algorithms")
}
switch pk.PubKeyAlgo {
case PubKeyAlgoRSA, PubKeyAlgoRSASignOnly:
rsaPublicKey, _ := pk.PublicKey.(*rsa.PublicKey)
err = rsa.VerifyPKCS1v15(rsaPublicKey, sig.Hash, hashBytes, padToKeySize(rsaPublicKey, sig.RSASignature.Bytes()))
if err != nil {
return errors.SignatureError("RSA verification failure")
}
return nil
case PubKeyAlgoDSA:
dsaPublicKey, _ := pk.PublicKey.(*dsa.PublicKey)
// Need to truncate hashBytes to match FIPS 186-3 section 4.6.
subgroupSize := (dsaPublicKey.Q.BitLen() + 7) / 8
if len(hashBytes) > subgroupSize {
hashBytes = hashBytes[:subgroupSize]
}
if !dsa.Verify(dsaPublicKey, hashBytes, new(big.Int).SetBytes(sig.DSASigR.Bytes()), new(big.Int).SetBytes(sig.DSASigS.Bytes())) {
return errors.SignatureError("DSA verification failure")
}
return nil
case PubKeyAlgoECDSA:
ecdsaPublicKey := pk.PublicKey.(*ecdsa.PublicKey)
if !ecdsa.Verify(ecdsaPublicKey, hashBytes, new(big.Int).SetBytes(sig.ECDSASigR.Bytes()), new(big.Int).SetBytes(sig.ECDSASigS.Bytes())) {
return errors.SignatureError("ECDSA verification failure")
}
return nil
case PubKeyAlgoEdDSA:
eddsaPublicKey := pk.PublicKey.(*eddsa.PublicKey)
if !eddsa.Verify(eddsaPublicKey, hashBytes, sig.EdDSASigR.Bytes(), sig.EdDSASigS.Bytes()) {
return errors.SignatureError("EdDSA verification failure")
}
return nil
default:
return errors.SignatureError("Unsupported public key algorithm used in signature")
}
}
// keySignatureHash returns a Hash of the message that needs to be signed for
// pk to assert a subkey relationship to signed.
func keySignatureHash(pk, signed signingKey, hashFunc crypto.Hash) (h hash.Hash, err error) {
if !hashFunc.Available() {
return nil, errors.UnsupportedError("hash function")
}
h = hashFunc.New()
// RFC 4880, section 5.2.4
err = pk.SerializeForHash(h)
if err != nil {
return nil, err
}
err = signed.SerializeForHash(h)
return
}
// VerifyKeySignature returns nil iff sig is a valid signature, made by this
// public key, of signed.
func (pk *PublicKey) VerifyKeySignature(signed *PublicKey, sig *Signature) error {
h, err := keySignatureHash(pk, signed, sig.Hash)
if err != nil {
return err
}
if err = pk.VerifySignature(h, sig); err != nil {
return err
}
if sig.FlagSign {
// Signing subkeys must be cross-signed. See
// https://www.gnupg.org/faq/subkey-cross-certify.html.
if sig.EmbeddedSignature == nil {
return errors.StructuralError("signing subkey is missing cross-signature")
}
// Verify the cross-signature. This is calculated over the same
// data as the main signature, so we cannot just recursively
// call signed.VerifyKeySignature(...)
if h, err = keySignatureHash(pk, signed, sig.EmbeddedSignature.Hash); err != nil {
return errors.StructuralError("error while hashing for cross-signature: " + err.Error())
}
if err := signed.VerifySignature(h, sig.EmbeddedSignature); err != nil {
return errors.StructuralError("error while verifying cross-signature: " + err.Error())
}
}
return nil
}
func keyRevocationHash(pk signingKey, hashFunc crypto.Hash) (h hash.Hash, err error) {
if !hashFunc.Available() {
return nil, errors.UnsupportedError("hash function")
}
h = hashFunc.New()
// RFC 4880, section 5.2.4
err = pk.SerializeForHash(h)
return
}
// VerifyRevocationSignature returns nil iff sig is a valid signature, made by this
// public key.
func (pk *PublicKey) VerifyRevocationSignature(sig *Signature) (err error) {
h, err := keyRevocationHash(pk, sig.Hash)
if err != nil {
return err
}
return pk.VerifySignature(h, sig)
}
// VerifySubkeyRevocationSignature returns nil iff sig is a valid subkey revocation signature,
// made by this public key, of signed.
func (pk *PublicKey) VerifySubkeyRevocationSignature(sig *Signature, signed *PublicKey) (err error) {
h, err := keySignatureHash(pk, signed, sig.Hash)
if err != nil {
return err
}
return pk.VerifySignature(h, sig)
}
// userIdSignatureHash returns a Hash of the message that needs to be signed
// to assert that pk is a valid key for id.
func userIdSignatureHash(id string, pk *PublicKey, hashFunc crypto.Hash) (h hash.Hash, err error) {
if !hashFunc.Available() {
return nil, errors.UnsupportedError("hash function")
}
h = hashFunc.New()
// RFC 4880, section 5.2.4
pk.SerializeSignaturePrefix(h)
pk.serializeWithoutHeaders(h)
var buf [5]byte
buf[0] = 0xb4
buf[1] = byte(len(id) >> 24)
buf[2] = byte(len(id) >> 16)
buf[3] = byte(len(id) >> 8)
buf[4] = byte(len(id))
h.Write(buf[:])
h.Write([]byte(id))
return
}
// VerifyUserIdSignature returns nil iff sig is a valid signature, made by this
// public key, that id is the identity of pub.
func (pk *PublicKey) VerifyUserIdSignature(id string, pub *PublicKey, sig *Signature) (err error) {
h, err := userIdSignatureHash(id, pub, sig.Hash)
if err != nil {
return err
}
return pk.VerifySignature(h, sig)
}
// KeyIdString returns the public key's fingerprint in capital hex
// (e.g. "6C7EE1B8621CC013").
func (pk *PublicKey) KeyIdString() string {
return fmt.Sprintf("%X", pk.Fingerprint[12:20])
}
// KeyIdShortString returns the short form of public key's fingerprint
// in capital hex, as shown by gpg --list-keys (e.g. "621CC013").
func (pk *PublicKey) KeyIdShortString() string {
return fmt.Sprintf("%X", pk.Fingerprint[16:20])
}
// BitLength returns the bit length for the given public key.
func (pk *PublicKey) BitLength() (bitLength uint16, err error) {
switch pk.PubKeyAlgo {
case PubKeyAlgoRSA, PubKeyAlgoRSAEncryptOnly, PubKeyAlgoRSASignOnly:
bitLength = pk.n.BitLength()
case PubKeyAlgoDSA:
bitLength = pk.p.BitLength()
case PubKeyAlgoElGamal:
bitLength = pk.p.BitLength()
case PubKeyAlgoECDSA:
bitLength = pk.p.BitLength()
case PubKeyAlgoECDH:
bitLength = pk.p.BitLength()
case PubKeyAlgoEdDSA:
bitLength = pk.p.BitLength()
default:
err = errors.InvalidArgumentError("bad public-key algorithm")
}
return
}
// KeyExpired returns whether sig is a self-signature of a key that has
// expired or is created in the future.
func (pk *PublicKey) KeyExpired(sig *Signature, currentTime time.Time) bool {
if pk.CreationTime.After(currentTime) {
return true
}
if sig.KeyLifetimeSecs == nil || *sig.KeyLifetimeSecs == 0 {
return false
}
expiry := pk.CreationTime.Add(time.Duration(*sig.KeyLifetimeSecs) * time.Second)
return currentTime.After(expiry)
}

24
vendor/github.com/ProtonMail/go-crypto/openpgp/packet/public_key_test_data.go generated vendored Normal file
View File

@@ -0,0 +1,24 @@
package packet
const rsaFingerprintHex = "5fb74b1d03b1e3cb31bc2f8aa34d7e18c20c31bb"
const rsaPkDataHex = "988d044d3c5c10010400b1d13382944bd5aba23a4312968b5095d14f947f600eb478e14a6fcb16b0e0cac764884909c020bc495cfcc39a935387c661507bdb236a0612fb582cac3af9b29cc2c8c70090616c41b662f4da4c1201e195472eb7f4ae1ccbcbf9940fe21d985e379a5563dde5b9a23d35f1cfaa5790da3b79db26f23695107bfaca8e7b5bcd0011010001"
const dsaFingerprintHex = "eece4c094db002103714c63c8e8fbe54062f19ed"
const dsaPkDataHex = "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"
const ecdsaFingerprintHex = "9892270b38b8980b05c8d56d43fe956c542ca00b"
const ecdsaPkDataHex = "9893045071c29413052b8104002304230401f4867769cedfa52c325018896245443968e52e51d0c2df8d939949cb5b330f2921711fbee1c9b9dddb95d15cb0255e99badeddda7cc23d9ddcaacbc290969b9f24019375d61c2e4e3b36953a28d8b2bc95f78c3f1d592fb24499be348656a7b17e3963187b4361afe497bc5f9f81213f04069f8e1fb9e6a6290ae295ca1a92b894396cb4"
const ecdhFingerprintHex = "722354df2475a42164d1d49faa8b938f9a201946"
const ecdhPkDataHex = "b90073044d53059212052b810400220303042faa84024a20b6735c4897efa5bfb41bf85b7eefeab5ca0cb9ffc8ea04a46acb25534a577694f9e25340a4ab5223a9dd1eda530c8aa2e6718db10d7e672558c7736fe09369ea5739a2a3554bf16d41faa50562f11c6d39bbd5dffb6b9a9ec91803010909"
const eddsaFingerprintHex = "b2d5e5ec0e6deca6bc8eeeb00907e75e1dd99ad8"
const eddsaPkDataHex = "98330456e2132b16092b06010401da470f01010740bbda39266affa511a8c2d02edf690fb784b0499c4406185811a163539ef11dc1b41d74657374696e67203c74657374696e674074657374696e672e636f6d3e8879041316080021050256e2132b021b03050b09080702061508090a0b020416020301021e01021780000a09100907e75e1dd99ad86d0c00fe39d2008359352782bc9b61ac382584cd8eff3f57a18c2287e3afeeb05d1f04ba00fe2d0bc1ddf3ff8adb9afa3e7d9287244b4ec567f3db4d60b74a9b5465ed528203"
// Source: https://sites.google.com/site/brainhub/pgpecckeys#TOC-ECC-NIST-P-384-key
const ecc384PubHex = `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`

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vendor/github.com/ProtonMail/go-crypto/openpgp/packet/reader.go generated vendored Normal file
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// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package packet
import (
"io"
"github.com/ProtonMail/go-crypto/openpgp/errors"
)
// Reader reads packets from an io.Reader and allows packets to be 'unread' so
// that they result from the next call to Next.
type Reader struct {
q []Packet
readers []io.Reader
}
// New io.Readers are pushed when a compressed or encrypted packet is processed
// and recursively treated as a new source of packets. However, a carefully
// crafted packet can trigger an infinite recursive sequence of packets. See
// http://mumble.net/~campbell/misc/pgp-quine
// https://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2013-4402
// This constant limits the number of recursive packets that may be pushed.
const maxReaders = 32
// Next returns the most recently unread Packet, or reads another packet from
// the top-most io.Reader. Unknown packet types are skipped.
func (r *Reader) Next() (p Packet, err error) {
if len(r.q) > 0 {
p = r.q[len(r.q)-1]
r.q = r.q[:len(r.q)-1]
return
}
for len(r.readers) > 0 {
p, err = Read(r.readers[len(r.readers)-1])
if err == nil {
return
}
if err == io.EOF {
r.readers = r.readers[:len(r.readers)-1]
continue
}
// TODO: Add strict mode that rejects unknown packets, instead of ignoring them.
if _, ok := err.(errors.UnknownPacketTypeError); ok {
continue
}
if _, ok := err.(errors.UnsupportedError); ok {
switch p.(type) {
case *SymmetricallyEncrypted, *AEADEncrypted, *Compressed, *LiteralData:
return nil, err
}
continue
}
return nil, err
}
return nil, io.EOF
}
// Push causes the Reader to start reading from a new io.Reader. When an EOF
// error is seen from the new io.Reader, it is popped and the Reader continues
// to read from the next most recent io.Reader. Push returns a StructuralError
// if pushing the reader would exceed the maximum recursion level, otherwise it
// returns nil.
func (r *Reader) Push(reader io.Reader) (err error) {
if len(r.readers) >= maxReaders {
return errors.StructuralError("too many layers of packets")
}
r.readers = append(r.readers, reader)
return nil
}
// Unread causes the given Packet to be returned from the next call to Next.
func (r *Reader) Unread(p Packet) {
r.q = append(r.q, p)
}
func NewReader(r io.Reader) *Reader {
return &Reader{
q: nil,
readers: []io.Reader{r},
}
}

1000
vendor/github.com/ProtonMail/go-crypto/openpgp/packet/signature.go generated vendored Normal file
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267
vendor/github.com/ProtonMail/go-crypto/openpgp/packet/symmetric_key_encrypted.go generated vendored Normal file
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// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package packet
import (
"bytes"
"crypto/cipher"
"io"
"strconv"
"github.com/ProtonMail/go-crypto/openpgp/errors"
"github.com/ProtonMail/go-crypto/openpgp/s2k"
)
// This is the largest session key that we'll support. Since no 512-bit cipher
// has even been seriously used, this is comfortably large.
const maxSessionKeySizeInBytes = 64
// SymmetricKeyEncrypted represents a passphrase protected session key. See RFC
// 4880, section 5.3.
type SymmetricKeyEncrypted struct {
Version int
CipherFunc CipherFunction
Mode AEADMode
s2k func(out, in []byte)
aeadNonce []byte
encryptedKey []byte
}
func (ske *SymmetricKeyEncrypted) parse(r io.Reader) error {
// RFC 4880, section 5.3.
var buf [2]byte
if _, err := readFull(r, buf[:]); err != nil {
return err
}
ske.Version = int(buf[0])
if ske.Version != 4 && ske.Version != 5 {
return errors.UnsupportedError("unknown SymmetricKeyEncrypted version")
}
ske.CipherFunc = CipherFunction(buf[1])
if ske.CipherFunc.KeySize() == 0 {
return errors.UnsupportedError("unknown cipher: " + strconv.Itoa(int(buf[1])))
}
if ske.Version == 5 {
mode := make([]byte, 1)
if _, err := r.Read(mode); err != nil {
return errors.StructuralError("cannot read AEAD octet from packet")
}
ske.Mode = AEADMode(mode[0])
}
var err error
if ske.s2k, err = s2k.Parse(r); err != nil {
if _, ok := err.(errors.ErrDummyPrivateKey); ok {
return errors.UnsupportedError("missing key GNU extension in session key")
}
return err
}
if ske.Version == 5 {
// AEAD nonce
nonce := make([]byte, ske.Mode.NonceLength())
_, err := readFull(r, nonce)
if err != nil && err != io.ErrUnexpectedEOF {
return err
}
ske.aeadNonce = nonce
}
encryptedKey := make([]byte, maxSessionKeySizeInBytes)
// The session key may follow. We just have to try and read to find
// out. If it exists then we limit it to maxSessionKeySizeInBytes.
n, err := readFull(r, encryptedKey)
if err != nil && err != io.ErrUnexpectedEOF {
return err
}
if n != 0 {
if n == maxSessionKeySizeInBytes {
return errors.UnsupportedError("oversized encrypted session key")
}
ske.encryptedKey = encryptedKey[:n]
}
return nil
}
// Decrypt attempts to decrypt an encrypted session key and returns the key and
// the cipher to use when decrypting a subsequent Symmetrically Encrypted Data
// packet.
func (ske *SymmetricKeyEncrypted) Decrypt(passphrase []byte) ([]byte, CipherFunction, error) {
key := make([]byte, ske.CipherFunc.KeySize())
ske.s2k(key, passphrase)
if len(ske.encryptedKey) == 0 {
return key, ske.CipherFunc, nil
}
switch ske.Version {
case 4:
plaintextKey, cipherFunc, err := ske.decryptV4(key)
return plaintextKey, cipherFunc, err
case 5:
plaintextKey, err := ske.decryptV5(key)
return plaintextKey, CipherFunction(0), err
}
err := errors.UnsupportedError("unknown SymmetricKeyEncrypted version")
return nil, CipherFunction(0), err
}
func (ske *SymmetricKeyEncrypted) decryptV4(key []byte) ([]byte, CipherFunction, error) {
// the IV is all zeros
iv := make([]byte, ske.CipherFunc.blockSize())
c := cipher.NewCFBDecrypter(ske.CipherFunc.new(key), iv)
plaintextKey := make([]byte, len(ske.encryptedKey))
c.XORKeyStream(plaintextKey, ske.encryptedKey)
cipherFunc := CipherFunction(plaintextKey[0])
if cipherFunc.blockSize() == 0 {
return nil, ske.CipherFunc, errors.UnsupportedError(
"unknown cipher: " + strconv.Itoa(int(cipherFunc)))
}
plaintextKey = plaintextKey[1:]
if len(plaintextKey) != cipherFunc.KeySize() {
return nil, cipherFunc, errors.StructuralError(
"length of decrypted key not equal to cipher keysize")
}
return plaintextKey, cipherFunc, nil
}
func (ske *SymmetricKeyEncrypted) decryptV5(key []byte) ([]byte, error) {
blockCipher := CipherFunction(ske.CipherFunc).new(key)
aead := ske.Mode.new(blockCipher)
adata := []byte{0xc3, byte(5), byte(ske.CipherFunc), byte(ske.Mode)}
plaintextKey, err := aead.Open(nil, ske.aeadNonce, ske.encryptedKey, adata)
if err != nil {
return nil, err
}
return plaintextKey, nil
}
// SerializeSymmetricKeyEncrypted serializes a symmetric key packet to w.
// The packet contains a random session key, encrypted by a key derived from
// the given passphrase. The session key is returned and must be passed to
// SerializeSymmetricallyEncrypted or SerializeAEADEncrypted, depending on
// whether config.AEADConfig != nil.
// If config is nil, sensible defaults will be used.
func SerializeSymmetricKeyEncrypted(w io.Writer, passphrase []byte, config *Config) (key []byte, err error) {
cipherFunc := config.Cipher()
keySize := cipherFunc.KeySize()
if keySize == 0 {
return nil, errors.UnsupportedError("unknown cipher: " + strconv.Itoa(int(cipherFunc)))
}
sessionKey := make([]byte, keySize)
_, err = io.ReadFull(config.Random(), sessionKey)
if err != nil {
return
}
err = SerializeSymmetricKeyEncryptedReuseKey(w, sessionKey, passphrase, config)
if err != nil {
return
}
key = sessionKey
return
}
// SerializeSymmetricKeyEncryptedReuseKey serializes a symmetric key packet to w.
// The packet contains the given session key, encrypted by a key derived from
// the given passphrase. The session key must be passed to
// SerializeSymmetricallyEncrypted or SerializeAEADEncrypted, depending on
// whether config.AEADConfig != nil.
// If config is nil, sensible defaults will be used.
func SerializeSymmetricKeyEncryptedReuseKey(w io.Writer, sessionKey []byte, passphrase []byte, config *Config) (err error) {
var version int
if config.AEAD() != nil {
version = 5
} else {
version = 4
}
cipherFunc := config.Cipher()
keySize := cipherFunc.KeySize()
if keySize == 0 {
return errors.UnsupportedError("unknown cipher: " + strconv.Itoa(int(cipherFunc)))
}
s2kBuf := new(bytes.Buffer)
keyEncryptingKey := make([]byte, keySize)
// s2k.Serialize salts and stretches the passphrase, and writes the
// resulting key to keyEncryptingKey and the s2k descriptor to s2kBuf.
err = s2k.Serialize(s2kBuf, keyEncryptingKey, config.Random(), passphrase, &s2k.Config{Hash: config.Hash(), S2KCount: config.PasswordHashIterations()})
if err != nil {
return
}
s2kBytes := s2kBuf.Bytes()
var packetLength int
switch version {
case 4:
packetLength = 2 /* header */ + len(s2kBytes) + 1 /* cipher type */ + keySize
case 5:
nonceLen := config.AEAD().Mode().NonceLength()
tagLen := config.AEAD().Mode().TagLength()
packetLength = 3 + len(s2kBytes) + nonceLen + keySize + tagLen
}
err = serializeHeader(w, packetTypeSymmetricKeyEncrypted, packetLength)
if err != nil {
return
}
buf := make([]byte, 2)
// Symmetric Key Encrypted Version
buf[0] = byte(version)
// Cipher function
buf[1] = byte(cipherFunc)
if version == 5 {
// AEAD mode
buf = append(buf, byte(config.AEAD().Mode()))
}
_, err = w.Write(buf)
if err != nil {
return
}
_, err = w.Write(s2kBytes)
if err != nil {
return
}
switch version {
case 4:
iv := make([]byte, cipherFunc.blockSize())
c := cipher.NewCFBEncrypter(cipherFunc.new(keyEncryptingKey), iv)
encryptedCipherAndKey := make([]byte, keySize+1)
c.XORKeyStream(encryptedCipherAndKey, buf[1:])
c.XORKeyStream(encryptedCipherAndKey[1:], sessionKey)
_, err = w.Write(encryptedCipherAndKey)
if err != nil {
return
}
case 5:
blockCipher := cipherFunc.new(keyEncryptingKey)
mode := config.AEAD().Mode()
aead := mode.new(blockCipher)
// Sample nonce using random reader
nonce := make([]byte, config.AEAD().Mode().NonceLength())
_, err = io.ReadFull(config.Random(), nonce)
if err != nil {
return
}
// Seal and write (encryptedData includes auth. tag)
adata := []byte{0xc3, byte(5), byte(cipherFunc), byte(mode)}
encryptedData := aead.Seal(nil, nonce, sessionKey, adata)
_, err = w.Write(nonce)
if err != nil {
return
}
_, err = w.Write(encryptedData)
if err != nil {
return
}
}
return
}

292
vendor/github.com/ProtonMail/go-crypto/openpgp/packet/symmetrically_encrypted.go generated vendored Normal file
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// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package packet
import (
"crypto/cipher"
"crypto/sha1"
"crypto/subtle"
"hash"
"io"
"strconv"
"github.com/ProtonMail/go-crypto/openpgp/errors"
)
// SymmetricallyEncrypted represents a symmetrically encrypted byte string. The
// encrypted Contents will consist of more OpenPGP packets. See RFC 4880,
// sections 5.7 and 5.13.
type SymmetricallyEncrypted struct {
MDC bool // true iff this is a type 18 packet and thus has an embedded MAC.
Contents io.Reader
prefix []byte
}
const symmetricallyEncryptedVersion = 1
func (se *SymmetricallyEncrypted) parse(r io.Reader) error {
if se.MDC {
// See RFC 4880, section 5.13.
var buf [1]byte
_, err := readFull(r, buf[:])
if err != nil {
return err
}
if buf[0] != symmetricallyEncryptedVersion {
return errors.UnsupportedError("unknown SymmetricallyEncrypted version")
}
} else {
return errors.UnsupportedError("Symmetrically encrypted packets without MDC are not supported")
}
se.Contents = r
return nil
}
// Decrypt returns a ReadCloser, from which the decrypted Contents of the
// packet can be read. An incorrect key will only be detected after trying
// to decrypt the entire data.
func (se *SymmetricallyEncrypted) Decrypt(c CipherFunction, key []byte) (io.ReadCloser, error) {
keySize := c.KeySize()
if keySize == 0 {
return nil, errors.UnsupportedError("unknown cipher: " + strconv.Itoa(int(c)))
}
if len(key) != keySize {
return nil, errors.InvalidArgumentError("SymmetricallyEncrypted: incorrect key length")
}
if se.prefix == nil {
se.prefix = make([]byte, c.blockSize()+2)
_, err := readFull(se.Contents, se.prefix)
if err != nil {
return nil, err
}
} else if len(se.prefix) != c.blockSize()+2 {
return nil, errors.InvalidArgumentError("can't try ciphers with different block lengths")
}
ocfbResync := OCFBResync
if se.MDC {
// MDC packets use a different form of OCFB mode.
ocfbResync = OCFBNoResync
}
s := NewOCFBDecrypter(c.new(key), se.prefix, ocfbResync)
plaintext := cipher.StreamReader{S: s, R: se.Contents}
if se.MDC {
// MDC packets have an embedded hash that we need to check.
h := sha1.New()
h.Write(se.prefix)
return &seMDCReader{in: plaintext, h: h}, nil
}
// Otherwise, we just need to wrap plaintext so that it's a valid ReadCloser.
return seReader{plaintext}, nil
}
// seReader wraps an io.Reader with a no-op Close method.
type seReader struct {
in io.Reader
}
func (ser seReader) Read(buf []byte) (int, error) {
return ser.in.Read(buf)
}
func (ser seReader) Close() error {
return nil
}
const mdcTrailerSize = 1 /* tag byte */ + 1 /* length byte */ + sha1.Size
// An seMDCReader wraps an io.Reader, maintains a running hash and keeps hold
// of the most recent 22 bytes (mdcTrailerSize). Upon EOF, those bytes form an
// MDC packet containing a hash of the previous Contents which is checked
// against the running hash. See RFC 4880, section 5.13.
type seMDCReader struct {
in io.Reader
h hash.Hash
trailer [mdcTrailerSize]byte
scratch [mdcTrailerSize]byte
trailerUsed int
error bool
eof bool
}
func (ser *seMDCReader) Read(buf []byte) (n int, err error) {
if ser.error {
err = io.ErrUnexpectedEOF
return
}
if ser.eof {
err = io.EOF
return
}
// If we haven't yet filled the trailer buffer then we must do that
// first.
for ser.trailerUsed < mdcTrailerSize {
n, err = ser.in.Read(ser.trailer[ser.trailerUsed:])
ser.trailerUsed += n
if err == io.EOF {
if ser.trailerUsed != mdcTrailerSize {
n = 0
err = io.ErrUnexpectedEOF
ser.error = true
return
}
ser.eof = true
n = 0
return
}
if err != nil {
n = 0
return
}
}
// If it's a short read then we read into a temporary buffer and shift
// the data into the caller's buffer.
if len(buf) <= mdcTrailerSize {
n, err = readFull(ser.in, ser.scratch[:len(buf)])
copy(buf, ser.trailer[:n])
ser.h.Write(buf[:n])
copy(ser.trailer[:], ser.trailer[n:])
copy(ser.trailer[mdcTrailerSize-n:], ser.scratch[:])
if n < len(buf) {
ser.eof = true
err = io.EOF
}
return
}
n, err = ser.in.Read(buf[mdcTrailerSize:])
copy(buf, ser.trailer[:])
ser.h.Write(buf[:n])
copy(ser.trailer[:], buf[n:])
if err == io.EOF {
ser.eof = true
}
return
}
// This is a new-format packet tag byte for a type 19 (MDC) packet.
const mdcPacketTagByte = byte(0x80) | 0x40 | 19
func (ser *seMDCReader) Close() error {
if ser.error {
return errors.ErrMDCMissing
}
for !ser.eof {
// We haven't seen EOF so we need to read to the end
var buf [1024]byte
_, err := ser.Read(buf[:])
if err == io.EOF {
break
}
if err != nil {
return errors.ErrMDCMissing
}
}
ser.h.Write(ser.trailer[:2])
final := ser.h.Sum(nil)
if subtle.ConstantTimeCompare(final, ser.trailer[2:]) != 1 {
return errors.ErrMDCHashMismatch
}
// The hash already includes the MDC header, but we still check its value
// to confirm encryption correctness
if ser.trailer[0] != mdcPacketTagByte || ser.trailer[1] != sha1.Size {
return errors.ErrMDCMissing
}
return nil
}
// An seMDCWriter writes through to an io.WriteCloser while maintains a running
// hash of the data written. On close, it emits an MDC packet containing the
// running hash.
type seMDCWriter struct {
w io.WriteCloser
h hash.Hash
}
func (w *seMDCWriter) Write(buf []byte) (n int, err error) {
w.h.Write(buf)
return w.w.Write(buf)
}
func (w *seMDCWriter) Close() (err error) {
var buf [mdcTrailerSize]byte
buf[0] = mdcPacketTagByte
buf[1] = sha1.Size
w.h.Write(buf[:2])
digest := w.h.Sum(nil)
copy(buf[2:], digest)
_, err = w.w.Write(buf[:])
if err != nil {
return
}
return w.w.Close()
}
// noOpCloser is like an ioutil.NopCloser, but for an io.Writer.
type noOpCloser struct {
w io.Writer
}
func (c noOpCloser) Write(data []byte) (n int, err error) {
return c.w.Write(data)
}
func (c noOpCloser) Close() error {
return nil
}
// SerializeSymmetricallyEncrypted serializes a symmetrically encrypted packet
// to w and returns a WriteCloser to which the to-be-encrypted packets can be
// written.
// If config is nil, sensible defaults will be used.
func SerializeSymmetricallyEncrypted(w io.Writer, c CipherFunction, key []byte, config *Config) (Contents io.WriteCloser, err error) {
if c.KeySize() != len(key) {
return nil, errors.InvalidArgumentError("SymmetricallyEncrypted.Serialize: bad key length")
}
writeCloser := noOpCloser{w}
ciphertext, err := serializeStreamHeader(writeCloser, packetTypeSymmetricallyEncryptedMDC)
if err != nil {
return
}
_, err = ciphertext.Write([]byte{symmetricallyEncryptedVersion})
if err != nil {
return
}
block := c.new(key)
blockSize := block.BlockSize()
iv := make([]byte, blockSize)
_, err = config.Random().Read(iv)
if err != nil {
return
}
s, prefix := NewOCFBEncrypter(block, iv, OCFBNoResync)
_, err = ciphertext.Write(prefix)
if err != nil {
return
}
plaintext := cipher.StreamWriter{S: s, W: ciphertext}
h := sha1.New()
h.Write(iv)
h.Write(iv[blockSize-2:])
Contents = &seMDCWriter{w: plaintext, h: h}
return
}

94
vendor/github.com/ProtonMail/go-crypto/openpgp/packet/userattribute.go generated vendored Normal file
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// Copyright 2013 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package packet
import (
"bytes"
"image"
"image/jpeg"
"io"
"io/ioutil"
)
const UserAttrImageSubpacket = 1
// UserAttribute is capable of storing other types of data about a user
// beyond name, email and a text comment. In practice, user attributes are typically used
// to store a signed thumbnail photo JPEG image of the user.
// See RFC 4880, section 5.12.
type UserAttribute struct {
Contents []*OpaqueSubpacket
}
// NewUserAttributePhoto creates a user attribute packet
// containing the given images.
func NewUserAttributePhoto(photos ...image.Image) (uat *UserAttribute, err error) {
uat = new(UserAttribute)
for _, photo := range photos {
var buf bytes.Buffer
// RFC 4880, Section 5.12.1.
data := []byte{
0x10, 0x00, // Little-endian image header length (16 bytes)
0x01, // Image header version 1
0x01, // JPEG
0, 0, 0, 0, // 12 reserved octets, must be all zero.
0, 0, 0, 0,
0, 0, 0, 0}
if _, err = buf.Write(data); err != nil {
return
}
if err = jpeg.Encode(&buf, photo, nil); err != nil {
return
}
uat.Contents = append(uat.Contents, &OpaqueSubpacket{
SubType: UserAttrImageSubpacket,
Contents: buf.Bytes()})
}
return
}
// NewUserAttribute creates a new user attribute packet containing the given subpackets.
func NewUserAttribute(contents ...*OpaqueSubpacket) *UserAttribute {
return &UserAttribute{Contents: contents}
}
func (uat *UserAttribute) parse(r io.Reader) (err error) {
// RFC 4880, section 5.13
b, err := ioutil.ReadAll(r)
if err != nil {
return
}
uat.Contents, err = OpaqueSubpackets(b)
return
}
// Serialize marshals the user attribute to w in the form of an OpenPGP packet, including
// header.
func (uat *UserAttribute) Serialize(w io.Writer) (err error) {
var buf bytes.Buffer
for _, sp := range uat.Contents {
err = sp.Serialize(&buf)
if err != nil {
return err
}
}
if err = serializeHeader(w, packetTypeUserAttribute, buf.Len()); err != nil {
return err
}
_, err = w.Write(buf.Bytes())
return
}
// ImageData returns zero or more byte slices, each containing
// JPEG File Interchange Format (JFIF), for each photo in the
// user attribute packet.
func (uat *UserAttribute) ImageData() (imageData [][]byte) {
for _, sp := range uat.Contents {
if sp.SubType == UserAttrImageSubpacket && len(sp.Contents) > 16 {
imageData = append(imageData, sp.Contents[16:])
}
}
return
}

167
vendor/github.com/ProtonMail/go-crypto/openpgp/packet/userid.go generated vendored Normal file
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// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package packet
import (
"io"
"io/ioutil"
"strings"
)
// UserId contains text that is intended to represent the name and email
// address of the key holder. See RFC 4880, section 5.11. By convention, this
// takes the form "Full Name (Comment) <email@example.com>"
type UserId struct {
Id string // By convention, this takes the form "Full Name (Comment) <email@example.com>" which is split out in the fields below.
Name, Comment, Email string
}
func hasInvalidCharacters(s string) bool {
for _, c := range s {
switch c {
case '(', ')', '<', '>', 0:
return true
}
}
return false
}
// NewUserId returns a UserId or nil if any of the arguments contain invalid
// characters. The invalid characters are '\x00', '(', ')', '<' and '>'
func NewUserId(name, comment, email string) *UserId {
// RFC 4880 doesn't deal with the structure of userid strings; the
// name, comment and email form is just a convention. However, there's
// no convention about escaping the metacharacters and GPG just refuses
// to create user ids where, say, the name contains a '('. We mirror
// this behaviour.
if hasInvalidCharacters(name) || hasInvalidCharacters(comment) || hasInvalidCharacters(email) {
return nil
}
uid := new(UserId)
uid.Name, uid.Comment, uid.Email = name, comment, email
uid.Id = name
if len(comment) > 0 {
if len(uid.Id) > 0 {
uid.Id += " "
}
uid.Id += "("
uid.Id += comment
uid.Id += ")"
}
if len(email) > 0 {
if len(uid.Id) > 0 {
uid.Id += " "
}
uid.Id += "<"
uid.Id += email
uid.Id += ">"
}
return uid
}
func (uid *UserId) parse(r io.Reader) (err error) {
// RFC 4880, section 5.11
b, err := ioutil.ReadAll(r)
if err != nil {
return
}
uid.Id = string(b)
uid.Name, uid.Comment, uid.Email = parseUserId(uid.Id)
return
}
// Serialize marshals uid to w in the form of an OpenPGP packet, including
// header.
func (uid *UserId) Serialize(w io.Writer) error {
err := serializeHeader(w, packetTypeUserId, len(uid.Id))
if err != nil {
return err
}
_, err = w.Write([]byte(uid.Id))
return err
}
// parseUserId extracts the name, comment and email from a user id string that
// is formatted as "Full Name (Comment) <email@example.com>".
func parseUserId(id string) (name, comment, email string) {
var n, c, e struct {
start, end int
}
var state int
for offset, rune := range id {
switch state {
case 0:
// Entering name
n.start = offset
state = 1
fallthrough
case 1:
// In name
if rune == '(' {
state = 2
n.end = offset
} else if rune == '<' {
state = 5
n.end = offset
}
case 2:
// Entering comment
c.start = offset
state = 3
fallthrough
case 3:
// In comment
if rune == ')' {
state = 4
c.end = offset
}
case 4:
// Between comment and email
if rune == '<' {
state = 5
}
case 5:
// Entering email
e.start = offset
state = 6
fallthrough
case 6:
// In email
if rune == '>' {
state = 7
e.end = offset
}
default:
// After email
}
}
switch state {
case 1:
// ended in the name
n.end = len(id)
case 3:
// ended in comment
c.end = len(id)
case 6:
// ended in email
e.end = len(id)
}
name = strings.TrimSpace(id[n.start:n.end])
comment = strings.TrimSpace(id[c.start:c.end])
email = strings.TrimSpace(id[e.start:e.end])
// RFC 2822 3.4: alternate simple form of a mailbox
if email == "" && strings.ContainsRune(name, '@') {
email = name
name = ""
}
return
}

532
vendor/github.com/ProtonMail/go-crypto/openpgp/read.go generated vendored Normal file
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// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package openpgp implements high level operations on OpenPGP messages.
package openpgp // import "github.com/ProtonMail/go-crypto/openpgp"
import (
"crypto"
_ "crypto/sha256"
"hash"
"io"
"strconv"
"github.com/ProtonMail/go-crypto/openpgp/armor"
"github.com/ProtonMail/go-crypto/openpgp/errors"
"github.com/ProtonMail/go-crypto/openpgp/packet"
)
// SignatureType is the armor type for a PGP signature.
var SignatureType = "PGP SIGNATURE"
// readArmored reads an armored block with the given type.
func readArmored(r io.Reader, expectedType string) (body io.Reader, err error) {
block, err := armor.Decode(r)
if err != nil {
return
}
if block.Type != expectedType {
return nil, errors.InvalidArgumentError("expected '" + expectedType + "', got: " + block.Type)
}
return block.Body, nil
}
// MessageDetails contains the result of parsing an OpenPGP encrypted and/or
// signed message.
type MessageDetails struct {
IsEncrypted bool // true if the message was encrypted.
EncryptedToKeyIds []uint64 // the list of recipient key ids.
IsSymmetricallyEncrypted bool // true if a passphrase could have decrypted the message.
DecryptedWith Key // the private key used to decrypt the message, if any.
IsSigned bool // true if the message is signed.
SignedByKeyId uint64 // the key id of the signer, if any.
SignedBy *Key // the key of the signer, if available.
LiteralData *packet.LiteralData // the metadata of the contents
UnverifiedBody io.Reader // the contents of the message.
// If IsSigned is true and SignedBy is non-zero then the signature will
// be verified as UnverifiedBody is read. The signature cannot be
// checked until the whole of UnverifiedBody is read so UnverifiedBody
// must be consumed until EOF before the data can be trusted. Even if a
// message isn't signed (or the signer is unknown) the data may contain
// an authentication code that is only checked once UnverifiedBody has
// been consumed. Once EOF has been seen, the following fields are
// valid. (An authentication code failure is reported as a
// SignatureError error when reading from UnverifiedBody.)
Signature *packet.Signature // the signature packet itself.
SignatureError error // nil if the signature is good.
UnverifiedSignatures []*packet.Signature // all other unverified signature packets.
decrypted io.ReadCloser
}
// A PromptFunction is used as a callback by functions that may need to decrypt
// a private key, or prompt for a passphrase. It is called with a list of
// acceptable, encrypted private keys and a boolean that indicates whether a
// passphrase is usable. It should either decrypt a private key or return a
// passphrase to try. If the decrypted private key or given passphrase isn't
// correct, the function will be called again, forever. Any error returned will
// be passed up.
type PromptFunction func(keys []Key, symmetric bool) ([]byte, error)
// A keyEnvelopePair is used to store a private key with the envelope that
// contains a symmetric key, encrypted with that key.
type keyEnvelopePair struct {
key Key
encryptedKey *packet.EncryptedKey
}
// ReadMessage parses an OpenPGP message that may be signed and/or encrypted.
// The given KeyRing should contain both public keys (for signature
// verification) and, possibly encrypted, private keys for decrypting.
// If config is nil, sensible defaults will be used.
func ReadMessage(r io.Reader, keyring KeyRing, prompt PromptFunction, config *packet.Config) (md *MessageDetails, err error) {
var p packet.Packet
var symKeys []*packet.SymmetricKeyEncrypted
var pubKeys []keyEnvelopePair
// Integrity protected encrypted packet: SymmetricallyEncrypted or AEADEncrypted
var edp packet.EncryptedDataPacket
packets := packet.NewReader(r)
md = new(MessageDetails)
md.IsEncrypted = true
// The message, if encrypted, starts with a number of packets
// containing an encrypted decryption key. The decryption key is either
// encrypted to a public key, or with a passphrase. This loop
// collects these packets.
ParsePackets:
for {
p, err = packets.Next()
if err != nil {
return nil, err
}
switch p := p.(type) {
case *packet.SymmetricKeyEncrypted:
// This packet contains the decryption key encrypted with a passphrase.
md.IsSymmetricallyEncrypted = true
symKeys = append(symKeys, p)
case *packet.EncryptedKey:
// This packet contains the decryption key encrypted to a public key.
md.EncryptedToKeyIds = append(md.EncryptedToKeyIds, p.KeyId)
switch p.Algo {
case packet.PubKeyAlgoRSA, packet.PubKeyAlgoRSAEncryptOnly, packet.PubKeyAlgoElGamal, packet.PubKeyAlgoECDH:
break
default:
continue
}
if keyring != nil {
var keys []Key
if p.KeyId == 0 {
keys = keyring.DecryptionKeys()
} else {
keys = keyring.KeysById(p.KeyId)
}
for _, k := range keys {
pubKeys = append(pubKeys, keyEnvelopePair{k, p})
}
}
case *packet.SymmetricallyEncrypted, *packet.AEADEncrypted:
edp = p.(packet.EncryptedDataPacket)
break ParsePackets
case *packet.Compressed, *packet.LiteralData, *packet.OnePassSignature:
// This message isn't encrypted.
if len(symKeys) != 0 || len(pubKeys) != 0 {
return nil, errors.StructuralError("key material not followed by encrypted message")
}
packets.Unread(p)
return readSignedMessage(packets, nil, keyring, config)
}
}
var candidates []Key
var decrypted io.ReadCloser
// Now that we have the list of encrypted keys we need to decrypt at
// least one of them or, if we cannot, we need to call the prompt
// function so that it can decrypt a key or give us a passphrase.
FindKey:
for {
// See if any of the keys already have a private key available
candidates = candidates[:0]
candidateFingerprints := make(map[string]bool)
for _, pk := range pubKeys {
if pk.key.PrivateKey == nil {
continue
}
if !pk.key.PrivateKey.Encrypted {
if len(pk.encryptedKey.Key) == 0 {
errDec := pk.encryptedKey.Decrypt(pk.key.PrivateKey, config)
if errDec != nil {
continue
}
}
// Try to decrypt symmetrically encrypted
decrypted, err = edp.Decrypt(pk.encryptedKey.CipherFunc, pk.encryptedKey.Key)
if err != nil && err != errors.ErrKeyIncorrect {
return nil, err
}
if decrypted != nil {
md.DecryptedWith = pk.key
break FindKey
}
} else {
fpr := string(pk.key.PublicKey.Fingerprint[:])
if v := candidateFingerprints[fpr]; v {
continue
}
candidates = append(candidates, pk.key)
candidateFingerprints[fpr] = true
}
}
if len(candidates) == 0 && len(symKeys) == 0 {
return nil, errors.ErrKeyIncorrect
}
if prompt == nil {
return nil, errors.ErrKeyIncorrect
}
passphrase, err := prompt(candidates, len(symKeys) != 0)
if err != nil {
return nil, err
}
// Try the symmetric passphrase first
if len(symKeys) != 0 && passphrase != nil {
for _, s := range symKeys {
key, cipherFunc, err := s.Decrypt(passphrase)
// On wrong passphrase, session key decryption is very likely to result in an invalid cipherFunc:
// only for < 5% of cases we will proceed to decrypt the data
if err == nil {
decrypted, err = edp.Decrypt(cipherFunc, key)
// TODO: ErrKeyIncorrect is no longer thrown on SEIP decryption,
// but it might still be relevant for when we implement AEAD decryption (otherwise, remove?)
if err != nil && err != errors.ErrKeyIncorrect {
return nil, err
}
if decrypted != nil {
break FindKey
}
}
}
}
}
md.decrypted = decrypted
if err := packets.Push(decrypted); err != nil {
return nil, err
}
mdFinal, sensitiveParsingErr := readSignedMessage(packets, md, keyring, config)
if sensitiveParsingErr != nil {
return nil, errors.StructuralError("parsing error")
}
return mdFinal, nil
}
// readSignedMessage reads a possibly signed message if mdin is non-zero then
// that structure is updated and returned. Otherwise a fresh MessageDetails is
// used.
func readSignedMessage(packets *packet.Reader, mdin *MessageDetails, keyring KeyRing, config *packet.Config) (md *MessageDetails, err error) {
if mdin == nil {
mdin = new(MessageDetails)
}
md = mdin
var p packet.Packet
var h hash.Hash
var wrappedHash hash.Hash
var prevLast bool
FindLiteralData:
for {
p, err = packets.Next()
if err != nil {
return nil, err
}
switch p := p.(type) {
case *packet.Compressed:
if err := packets.Push(p.Body); err != nil {
return nil, err
}
case *packet.OnePassSignature:
if prevLast {
return nil, errors.UnsupportedError("nested signature packets")
}
if p.IsLast {
prevLast = true
}
h, wrappedHash, err = hashForSignature(p.Hash, p.SigType)
if err != nil {
md.SignatureError = err
}
md.IsSigned = true
md.SignedByKeyId = p.KeyId
if keyring != nil {
keys := keyring.KeysByIdUsage(p.KeyId, packet.KeyFlagSign)
if len(keys) > 0 {
md.SignedBy = &keys[0]
}
}
case *packet.LiteralData:
md.LiteralData = p
break FindLiteralData
}
}
if md.IsSigned && md.SignatureError == nil {
md.UnverifiedBody = &signatureCheckReader{packets, h, wrappedHash, md, config}
} else if md.decrypted != nil {
md.UnverifiedBody = checkReader{md}
} else {
md.UnverifiedBody = md.LiteralData.Body
}
return md, nil
}
// hashForSignature returns a pair of hashes that can be used to verify a
// signature. The signature may specify that the contents of the signed message
// should be preprocessed (i.e. to normalize line endings). Thus this function
// returns two hashes. The second should be used to hash the message itself and
// performs any needed preprocessing.
func hashForSignature(hashId crypto.Hash, sigType packet.SignatureType) (hash.Hash, hash.Hash, error) {
if hashId == crypto.MD5 {
return nil, nil, errors.UnsupportedError("insecure hash algorithm: MD5")
}
if !hashId.Available() {
return nil, nil, errors.UnsupportedError("hash not available: " + strconv.Itoa(int(hashId)))
}
h := hashId.New()
switch sigType {
case packet.SigTypeBinary:
return h, h, nil
case packet.SigTypeText:
return h, NewCanonicalTextHash(h), nil
}
return nil, nil, errors.UnsupportedError("unsupported signature type: " + strconv.Itoa(int(sigType)))
}
// checkReader wraps an io.Reader from a LiteralData packet. When it sees EOF
// it closes the ReadCloser from any SymmetricallyEncrypted packet to trigger
// MDC checks.
type checkReader struct {
md *MessageDetails
}
func (cr checkReader) Read(buf []byte) (int, error) {
n, sensitiveParsingError := cr.md.LiteralData.Body.Read(buf)
if sensitiveParsingError == io.EOF {
mdcErr := cr.md.decrypted.Close()
if mdcErr != nil {
return n, mdcErr
}
return n, io.EOF
}
if sensitiveParsingError != nil {
return n, errors.StructuralError("parsing error")
}
return n, nil
}
// signatureCheckReader wraps an io.Reader from a LiteralData packet and hashes
// the data as it is read. When it sees an EOF from the underlying io.Reader
// it parses and checks a trailing Signature packet and triggers any MDC checks.
type signatureCheckReader struct {
packets *packet.Reader
h, wrappedHash hash.Hash
md *MessageDetails
config *packet.Config
}
func (scr *signatureCheckReader) Read(buf []byte) (int, error) {
n, sensitiveParsingError := scr.md.LiteralData.Body.Read(buf)
// Hash only if required
if scr.md.SignedBy != nil {
scr.wrappedHash.Write(buf[:n])
}
if sensitiveParsingError == io.EOF {
var p packet.Packet
var readError error
var sig *packet.Signature
p, readError = scr.packets.Next()
for readError == nil {
var ok bool
if sig, ok = p.(*packet.Signature); ok {
if sig.Version == 5 && (sig.SigType == 0x00 || sig.SigType == 0x01) {
sig.Metadata = scr.md.LiteralData
}
// If signature KeyID matches
if scr.md.SignedBy != nil && *sig.IssuerKeyId == scr.md.SignedByKeyId {
key := scr.md.SignedBy
signatureError := key.PublicKey.VerifySignature(scr.h, sig)
if signatureError == nil {
now := scr.config.Now()
if key.Revoked(now) ||
key.Entity.Revoked(now) || // primary key is revoked (redundant if key is the primary key)
key.Entity.PrimaryIdentity().Revoked(now) {
signatureError = errors.ErrKeyRevoked
}
if sig.SigExpired(now) {
signatureError = errors.ErrSignatureExpired
}
if key.PublicKey.KeyExpired(key.SelfSignature, now) ||
key.SelfSignature.SigExpired(now) {
signatureError = errors.ErrKeyExpired
}
}
scr.md.Signature = sig
scr.md.SignatureError = signatureError
} else {
scr.md.UnverifiedSignatures = append(scr.md.UnverifiedSignatures, sig)
}
}
p, readError = scr.packets.Next()
}
if scr.md.SignedBy != nil && scr.md.Signature == nil {
if scr.md.UnverifiedSignatures == nil {
scr.md.SignatureError = errors.StructuralError("LiteralData not followed by signature")
} else {
scr.md.SignatureError = errors.StructuralError("No matching signature found")
}
}
// The SymmetricallyEncrypted packet, if any, might have an
// unsigned hash of its own. In order to check this we need to
// close that Reader.
if scr.md.decrypted != nil {
mdcErr := scr.md.decrypted.Close()
if mdcErr != nil {
return n, mdcErr
}
}
return n, io.EOF
}
if sensitiveParsingError != nil {
return n, errors.StructuralError("parsing error")
}
return n, nil
}
// CheckDetachedSignature takes a signed file and a detached signature and
// returns the signer if the signature is valid. If the signer isn't known,
// ErrUnknownIssuer is returned.
func CheckDetachedSignature(keyring KeyRing, signed, signature io.Reader, config *packet.Config) (signer *Entity, err error) {
var expectedHashes []crypto.Hash
return CheckDetachedSignatureAndHash(keyring, signed, signature, expectedHashes, config)
}
// CheckDetachedSignatureAndHash performs the same actions as
// CheckDetachedSignature and checks that the expected hash functions were used.
func CheckDetachedSignatureAndHash(keyring KeyRing, signed, signature io.Reader, expectedHashes []crypto.Hash, config *packet.Config) (signer *Entity, err error) {
var issuerKeyId uint64
var hashFunc crypto.Hash
var sigType packet.SignatureType
var keys []Key
var p packet.Packet
expectedHashesLen := len(expectedHashes)
packets := packet.NewReader(signature)
var sig *packet.Signature
for {
p, err = packets.Next()
if err == io.EOF {
return nil, errors.ErrUnknownIssuer
}
if err != nil {
return nil, err
}
var ok bool
sig, ok = p.(*packet.Signature)
if !ok {
return nil, errors.StructuralError("non signature packet found")
}
if sig.IssuerKeyId == nil {
return nil, errors.StructuralError("signature doesn't have an issuer")
}
issuerKeyId = *sig.IssuerKeyId
hashFunc = sig.Hash
sigType = sig.SigType
for i, expectedHash := range expectedHashes {
if hashFunc == expectedHash {
break
}
if i+1 == expectedHashesLen {
return nil, errors.StructuralError("hash algorithm mismatch with cleartext message headers")
}
}
keys = keyring.KeysByIdUsage(issuerKeyId, packet.KeyFlagSign)
if len(keys) > 0 {
break
}
}
if len(keys) == 0 {
panic("unreachable")
}
h, wrappedHash, err := hashForSignature(hashFunc, sigType)
if err != nil {
return nil, err
}
if _, err := io.Copy(wrappedHash, signed); err != nil && err != io.EOF {
return nil, err
}
for _, key := range keys {
err = key.PublicKey.VerifySignature(h, sig)
if err == nil {
now := config.Now()
if key.Revoked(now) ||
key.Entity.Revoked(now) || // primary key is revoked (redundant if key is the primary key)
key.Entity.PrimaryIdentity().Revoked(now) {
return key.Entity, errors.ErrKeyRevoked
}
if sig.SigExpired(now) {
return key.Entity, errors.ErrSignatureExpired
}
if key.PublicKey.KeyExpired(key.SelfSignature, now) ||
key.SelfSignature.SigExpired(now) {
return key.Entity, errors.ErrKeyExpired
}
return key.Entity, nil
}
}
return nil, err
}
// CheckArmoredDetachedSignature performs the same actions as
// CheckDetachedSignature but expects the signature to be armored.
func CheckArmoredDetachedSignature(keyring KeyRing, signed, signature io.Reader, config *packet.Config) (signer *Entity, err error) {
body, err := readArmored(signature, SignatureType)
if err != nil {
return
}
return CheckDetachedSignature(keyring, signed, body, config)
}

173
vendor/github.com/ProtonMail/go-crypto/openpgp/read_write_test_data.go generated vendored Normal file
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367
vendor/github.com/ProtonMail/go-crypto/openpgp/s2k/s2k.go generated vendored Normal file
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// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package s2k implements the various OpenPGP string-to-key transforms as
// specified in RFC 4800 section 3.7.1.
package s2k // import "github.com/ProtonMail/go-crypto/openpgp/s2k"
import (
"crypto"
"hash"
"io"
"strconv"
"github.com/ProtonMail/go-crypto/openpgp/errors"
"github.com/ProtonMail/go-crypto/openpgp/internal/algorithm"
)
// Config collects configuration parameters for s2k key-stretching
// transformations. A nil *Config is valid and results in all default
// values. Currently, Config is used only by the Serialize function in
// this package.
type Config struct {
// S2KMode is the mode of s2k function.
// It can be 0 (simple), 1(salted), 3(iterated)
// 2(reserved) 100-110(private/experimental).
S2KMode uint8
// Hash is the default hash function to be used. If
// nil, SHA256 is used.
Hash crypto.Hash
// S2KCount is only used for symmetric encryption. It
// determines the strength of the passphrase stretching when
// the said passphrase is hashed to produce a key. S2KCount
// should be between 65536 and 65011712, inclusive. If Config
// is nil or S2KCount is 0, the value 16777216 used. Not all
// values in the above range can be represented. S2KCount will
// be rounded up to the next representable value if it cannot
// be encoded exactly. See RFC 4880 Section 3.7.1.3.
S2KCount int
}
// Params contains all the parameters of the s2k packet
type Params struct {
// mode is the mode of s2k function.
// It can be 0 (simple), 1(salted), 3(iterated)
// 2(reserved) 100-110(private/experimental).
mode uint8
// hashId is the ID of the hash function used in any of the modes
hashId byte
// salt is a byte array to use as a salt in hashing process
salt []byte
// countByte is used to determine how many rounds of hashing are to
// be performed in s2k mode 3. See RFC 4880 Section 3.7.1.3.
countByte byte
}
func (c *Config) hash() crypto.Hash {
if c == nil || uint(c.Hash) == 0 {
return crypto.SHA256
}
return c.Hash
}
// EncodedCount get encoded count
func (c *Config) EncodedCount() uint8 {
if c == nil || c.S2KCount == 0 {
return 224 // The common case. Corresponding to 16777216
}
i := c.S2KCount
switch {
case i < 65536:
i = 65536
case i > 65011712:
i = 65011712
}
return encodeCount(i)
}
// encodeCount converts an iterative "count" in the range 1024 to
// 65011712, inclusive, to an encoded count. The return value is the
// octet that is actually stored in the GPG file. encodeCount panics
// if i is not in the above range (encodedCount above takes care to
// pass i in the correct range). See RFC 4880 Section 3.7.7.1.
func encodeCount(i int) uint8 {
if i < 65536 || i > 65011712 {
panic("count arg i outside the required range")
}
for encoded := 96; encoded < 256; encoded++ {
count := decodeCount(uint8(encoded))
if count >= i {
return uint8(encoded)
}
}
return 255
}
// decodeCount returns the s2k mode 3 iterative "count" corresponding to
// the encoded octet c.
func decodeCount(c uint8) int {
return (16 + int(c&15)) << (uint32(c>>4) + 6)
}
// Simple writes to out the result of computing the Simple S2K function (RFC
// 4880, section 3.7.1.1) using the given hash and input passphrase.
func Simple(out []byte, h hash.Hash, in []byte) {
Salted(out, h, in, nil)
}
var zero [1]byte
// Salted writes to out the result of computing the Salted S2K function (RFC
// 4880, section 3.7.1.2) using the given hash, input passphrase and salt.
func Salted(out []byte, h hash.Hash, in []byte, salt []byte) {
done := 0
var digest []byte
for i := 0; done < len(out); i++ {
h.Reset()
for j := 0; j < i; j++ {
h.Write(zero[:])
}
h.Write(salt)
h.Write(in)
digest = h.Sum(digest[:0])
n := copy(out[done:], digest)
done += n
}
}
// Iterated writes to out the result of computing the Iterated and Salted S2K
// function (RFC 4880, section 3.7.1.3) using the given hash, input passphrase,
// salt and iteration count.
func Iterated(out []byte, h hash.Hash, in []byte, salt []byte, count int) {
combined := make([]byte, len(in)+len(salt))
copy(combined, salt)
copy(combined[len(salt):], in)
if count < len(combined) {
count = len(combined)
}
done := 0
var digest []byte
for i := 0; done < len(out); i++ {
h.Reset()
for j := 0; j < i; j++ {
h.Write(zero[:])
}
written := 0
for written < count {
if written+len(combined) > count {
todo := count - written
h.Write(combined[:todo])
written = count
} else {
h.Write(combined)
written += len(combined)
}
}
digest = h.Sum(digest[:0])
n := copy(out[done:], digest)
done += n
}
}
// Generate generates valid parameters from given configuration.
// It will enforce salted + hashed s2k method
func Generate(rand io.Reader, c *Config) (*Params, error) {
hashId, ok := HashToHashId(c.Hash)
if !ok {
return nil, errors.UnsupportedError("no such hash")
}
params := &Params{
mode: 3, // Enforce iterared + salted method
hashId: hashId,
salt: make([]byte, 8),
countByte: c.EncodedCount(),
}
if _, err := io.ReadFull(rand, params.salt); err != nil {
return nil, err
}
return params, nil
}
// Parse reads a binary specification for a string-to-key transformation from r
// and returns a function which performs that transform. If the S2K is a special
// GNU extension that indicates that the private key is missing, then the error
// returned is errors.ErrDummyPrivateKey.
func Parse(r io.Reader) (f func(out, in []byte), err error) {
params, err := ParseIntoParams(r)
if err != nil {
return nil, err
}
return params.Function()
}
// ParseIntoParams reads a binary specification for a string-to-key
// transformation from r and returns a struct describing the s2k parameters.
func ParseIntoParams(r io.Reader) (params *Params, err error) {
var buf [9]byte
_, err = io.ReadFull(r, buf[:2])
if err != nil {
return
}
params = &Params{
mode: buf[0],
hashId: buf[1],
}
switch params.mode {
case 0:
return params, nil
case 1:
_, err = io.ReadFull(r, buf[:8])
if err != nil {
return nil, err
}
params.salt = buf[:8]
return params, nil
case 3:
_, err = io.ReadFull(r, buf[:9])
if err != nil {
return nil, err
}
params.salt = buf[:8]
params.countByte = buf[8]
return params, nil
case 101:
// This is a GNU extension. See
// https://git.gnupg.org/cgi-bin/gitweb.cgi?p=gnupg.git;a=blob;f=doc/DETAILS;h=fe55ae16ab4e26d8356dc574c9e8bc935e71aef1;hb=23191d7851eae2217ecdac6484349849a24fd94a#l1109
if _, err = io.ReadFull(r, buf[:4]); err != nil {
return nil, err
}
if buf[0] == 'G' && buf[1] == 'N' && buf[2] == 'U' && buf[3] == 1 {
return params, nil
}
return nil, errors.UnsupportedError("GNU S2K extension")
}
return nil, errors.UnsupportedError("S2K function")
}
func (params *Params) Dummy() bool {
return params != nil && params.mode == 101
}
func (params *Params) Function() (f func(out, in []byte), err error) {
if params.Dummy() {
return nil, errors.ErrDummyPrivateKey("dummy key found")
}
hashObj, ok := HashIdToHash(params.hashId)
if !ok {
return nil, errors.UnsupportedError("hash for S2K function: " + strconv.Itoa(int(params.hashId)))
}
if !hashObj.Available() {
return nil, errors.UnsupportedError("hash not available: " + strconv.Itoa(int(hashObj)))
}
switch params.mode {
case 0:
f := func(out, in []byte) {
Simple(out, hashObj.New(), in)
}
return f, nil
case 1:
f := func(out, in []byte) {
Salted(out, hashObj.New(), in, params.salt)
}
return f, nil
case 3:
f := func(out, in []byte) {
Iterated(out, hashObj.New(), in, params.salt, decodeCount(params.countByte))
}
return f, nil
}
return nil, errors.UnsupportedError("S2K function")
}
func (params *Params) Serialize(w io.Writer) (err error) {
if _, err = w.Write([]byte{params.mode}); err != nil {
return
}
if _, err = w.Write([]byte{params.hashId}); err != nil {
return
}
if params.Dummy() {
_, err = w.Write(append([]byte("GNU"), 1))
return
}
if params.mode > 0 {
if _, err = w.Write(params.salt); err != nil {
return
}
if params.mode == 3 {
_, err = w.Write([]byte{params.countByte})
}
}
return
}
// Serialize salts and stretches the given passphrase and writes the
// resulting key into key. It also serializes an S2K descriptor to
// w. The key stretching can be configured with c, which may be
// nil. In that case, sensible defaults will be used.
func Serialize(w io.Writer, key []byte, rand io.Reader, passphrase []byte, c *Config) error {
params, err := Generate(rand, c)
if err != nil {
return err
}
err = params.Serialize(w)
if err != nil {
return err
}
f, err := params.Function()
if err != nil {
return err
}
f(key, passphrase)
return nil
}
// HashIdToHash returns a crypto.Hash which corresponds to the given OpenPGP
// hash id.
func HashIdToHash(id byte) (h crypto.Hash, ok bool) {
if hash, ok := algorithm.HashById[id]; ok {
return hash.HashFunc(), true
}
return 0, false
}
// HashIdToString returns the name of the hash function corresponding to the
// given OpenPGP hash id.
func HashIdToString(id byte) (name string, ok bool) {
if hash, ok := algorithm.HashById[id]; ok {
return hash.String(), true
}
return "", false
}
// HashIdToHash returns an OpenPGP hash id which corresponds the given Hash.
func HashToHashId(h crypto.Hash) (id byte, ok bool) {
for id, hash := range algorithm.HashById {
if hash.HashFunc() == h {
return id, true
}
}
return 0, false
}

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vendor/github.com/ProtonMail/go-crypto/openpgp/write.go generated vendored Normal file
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@@ -0,0 +1,568 @@
// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package openpgp
import (
"crypto"
"hash"
"io"
"strconv"
"time"
"github.com/ProtonMail/go-crypto/openpgp/armor"
"github.com/ProtonMail/go-crypto/openpgp/errors"
"github.com/ProtonMail/go-crypto/openpgp/packet"
"github.com/ProtonMail/go-crypto/openpgp/s2k"
)
// DetachSign signs message with the private key from signer (which must
// already have been decrypted) and writes the signature to w.
// If config is nil, sensible defaults will be used.
func DetachSign(w io.Writer, signer *Entity, message io.Reader, config *packet.Config) error {
return detachSign(w, signer, message, packet.SigTypeBinary, config)
}
// ArmoredDetachSign signs message with the private key from signer (which
// must already have been decrypted) and writes an armored signature to w.
// If config is nil, sensible defaults will be used.
func ArmoredDetachSign(w io.Writer, signer *Entity, message io.Reader, config *packet.Config) (err error) {
return armoredDetachSign(w, signer, message, packet.SigTypeBinary, config)
}
// DetachSignText signs message (after canonicalising the line endings) with
// the private key from signer (which must already have been decrypted) and
// writes the signature to w.
// If config is nil, sensible defaults will be used.
func DetachSignText(w io.Writer, signer *Entity, message io.Reader, config *packet.Config) error {
return detachSign(w, signer, message, packet.SigTypeText, config)
}
// ArmoredDetachSignText signs message (after canonicalising the line endings)
// with the private key from signer (which must already have been decrypted)
// and writes an armored signature to w.
// If config is nil, sensible defaults will be used.
func ArmoredDetachSignText(w io.Writer, signer *Entity, message io.Reader, config *packet.Config) error {
return armoredDetachSign(w, signer, message, packet.SigTypeText, config)
}
func armoredDetachSign(w io.Writer, signer *Entity, message io.Reader, sigType packet.SignatureType, config *packet.Config) (err error) {
out, err := armor.Encode(w, SignatureType, nil)
if err != nil {
return
}
err = detachSign(out, signer, message, sigType, config)
if err != nil {
return
}
return out.Close()
}
func detachSign(w io.Writer, signer *Entity, message io.Reader, sigType packet.SignatureType, config *packet.Config) (err error) {
signingKey, ok := signer.SigningKeyById(config.Now(), config.SigningKey())
if !ok {
return errors.InvalidArgumentError("no valid signing keys")
}
if signingKey.PrivateKey == nil {
return errors.InvalidArgumentError("signing key doesn't have a private key")
}
if signingKey.PrivateKey.Encrypted {
return errors.InvalidArgumentError("signing key is encrypted")
}
sig := new(packet.Signature)
sig.SigType = sigType
sig.PubKeyAlgo = signingKey.PrivateKey.PubKeyAlgo
sig.Hash = config.Hash()
sig.CreationTime = config.Now()
sigLifetimeSecs := config.SigLifetime()
sig.SigLifetimeSecs = &sigLifetimeSecs
sig.IssuerKeyId = &signingKey.PrivateKey.KeyId
h, wrappedHash, err := hashForSignature(sig.Hash, sig.SigType)
if err != nil {
return
}
if _, err = io.Copy(wrappedHash, message); err != nil {
return err
}
err = sig.Sign(h, signingKey.PrivateKey, config)
if err != nil {
return
}
return sig.Serialize(w)
}
// FileHints contains metadata about encrypted files. This metadata is, itself,
// encrypted.
type FileHints struct {
// IsBinary can be set to hint that the contents are binary data.
IsBinary bool
// FileName hints at the name of the file that should be written. It's
// truncated to 255 bytes if longer. It may be empty to suggest that the
// file should not be written to disk. It may be equal to "_CONSOLE" to
// suggest the data should not be written to disk.
FileName string
// ModTime contains the modification time of the file, or the zero time if not applicable.
ModTime time.Time
}
// SymmetricallyEncrypt acts like gpg -c: it encrypts a file with a passphrase.
// The resulting WriteCloser must be closed after the contents of the file have
// been written.
// If config is nil, sensible defaults will be used.
func SymmetricallyEncrypt(ciphertext io.Writer, passphrase []byte, hints *FileHints, config *packet.Config) (plaintext io.WriteCloser, err error) {
if hints == nil {
hints = &FileHints{}
}
key, err := packet.SerializeSymmetricKeyEncrypted(ciphertext, passphrase, config)
if err != nil {
return
}
var w io.WriteCloser
if config.AEAD() != nil {
w, err = packet.SerializeAEADEncrypted(ciphertext, key, config.Cipher(), config.AEAD().Mode(), config)
if err != nil {
return
}
} else {
w, err = packet.SerializeSymmetricallyEncrypted(ciphertext, config.Cipher(), key, config)
if err != nil {
return
}
}
literalData := w
if algo := config.Compression(); algo != packet.CompressionNone {
var compConfig *packet.CompressionConfig
if config != nil {
compConfig = config.CompressionConfig
}
literalData, err = packet.SerializeCompressed(w, algo, compConfig)
if err != nil {
return
}
}
var epochSeconds uint32
if !hints.ModTime.IsZero() {
epochSeconds = uint32(hints.ModTime.Unix())
}
return packet.SerializeLiteral(literalData, hints.IsBinary, hints.FileName, epochSeconds)
}
// intersectPreferences mutates and returns a prefix of a that contains only
// the values in the intersection of a and b. The order of a is preserved.
func intersectPreferences(a []uint8, b []uint8) (intersection []uint8) {
var j int
for _, v := range a {
for _, v2 := range b {
if v == v2 {
a[j] = v
j++
break
}
}
}
return a[:j]
}
func hashToHashId(h crypto.Hash) uint8 {
v, ok := s2k.HashToHashId(h)
if !ok {
panic("tried to convert unknown hash")
}
return v
}
// EncryptText encrypts a message to a number of recipients and, optionally,
// signs it. Optional information is contained in 'hints', also encrypted, that
// aids the recipients in processing the message. The resulting WriteCloser
// must be closed after the contents of the file have been written. If config
// is nil, sensible defaults will be used. The signing is done in text mode.
func EncryptText(ciphertext io.Writer, to []*Entity, signed *Entity, hints *FileHints, config *packet.Config) (plaintext io.WriteCloser, err error) {
return encrypt(ciphertext, ciphertext, to, signed, hints, packet.SigTypeText, config)
}
// Encrypt encrypts a message to a number of recipients and, optionally, signs
// it. hints contains optional information, that is also encrypted, that aids
// the recipients in processing the message. The resulting WriteCloser must
// be closed after the contents of the file have been written.
// If config is nil, sensible defaults will be used.
func Encrypt(ciphertext io.Writer, to []*Entity, signed *Entity, hints *FileHints, config *packet.Config) (plaintext io.WriteCloser, err error) {
return encrypt(ciphertext, ciphertext, to, signed, hints, packet.SigTypeBinary, config)
}
// EncryptSplit encrypts a message to a number of recipients and, optionally, signs
// it. hints contains optional information, that is also encrypted, that aids
// the recipients in processing the message. The resulting WriteCloser must
// be closed after the contents of the file have been written.
// If config is nil, sensible defaults will be used.
func EncryptSplit(keyWriter io.Writer, dataWriter io.Writer, to []*Entity, signed *Entity, hints *FileHints, config *packet.Config) (plaintext io.WriteCloser, err error) {
return encrypt(keyWriter, dataWriter, to, signed, hints, packet.SigTypeBinary, config)
}
// EncryptTextSplit encrypts a message to a number of recipients and, optionally, signs
// it. hints contains optional information, that is also encrypted, that aids
// the recipients in processing the message. The resulting WriteCloser must
// be closed after the contents of the file have been written.
// If config is nil, sensible defaults will be used.
func EncryptTextSplit(keyWriter io.Writer, dataWriter io.Writer, to []*Entity, signed *Entity, hints *FileHints, config *packet.Config) (plaintext io.WriteCloser, err error) {
return encrypt(keyWriter, dataWriter, to, signed, hints, packet.SigTypeText, config)
}
// writeAndSign writes the data as a payload package and, optionally, signs
// it. hints contains optional information, that is also encrypted,
// that aids the recipients in processing the message. The resulting
// WriteCloser must be closed after the contents of the file have been
// written. If config is nil, sensible defaults will be used.
func writeAndSign(payload io.WriteCloser, candidateHashes []uint8, signed *Entity, hints *FileHints, sigType packet.SignatureType, config *packet.Config) (plaintext io.WriteCloser, err error) {
var signer *packet.PrivateKey
if signed != nil {
signKey, ok := signed.SigningKeyById(config.Now(), config.SigningKey())
if !ok {
return nil, errors.InvalidArgumentError("no valid signing keys")
}
signer = signKey.PrivateKey
if signer == nil {
return nil, errors.InvalidArgumentError("no private key in signing key")
}
if signer.Encrypted {
return nil, errors.InvalidArgumentError("signing key must be decrypted")
}
}
var hash crypto.Hash
for _, hashId := range candidateHashes {
if h, ok := s2k.HashIdToHash(hashId); ok && h.Available() {
hash = h
break
}
}
// If the hash specified by config is a candidate, we'll use that.
if configuredHash := config.Hash(); configuredHash.Available() {
for _, hashId := range candidateHashes {
if h, ok := s2k.HashIdToHash(hashId); ok && h == configuredHash {
hash = h
break
}
}
}
if hash == 0 {
hashId := candidateHashes[0]
name, ok := s2k.HashIdToString(hashId)
if !ok {
name = "#" + strconv.Itoa(int(hashId))
}
return nil, errors.InvalidArgumentError("cannot encrypt because no candidate hash functions are compiled in. (Wanted " + name + " in this case.)")
}
if signer != nil {
ops := &packet.OnePassSignature{
SigType: sigType,
Hash: hash,
PubKeyAlgo: signer.PubKeyAlgo,
KeyId: signer.KeyId,
IsLast: true,
}
if err := ops.Serialize(payload); err != nil {
return nil, err
}
}
if hints == nil {
hints = &FileHints{}
}
w := payload
if signer != nil {
// If we need to write a signature packet after the literal
// data then we need to stop literalData from closing
// encryptedData.
w = noOpCloser{w}
}
var epochSeconds uint32
if !hints.ModTime.IsZero() {
epochSeconds = uint32(hints.ModTime.Unix())
}
literalData, err := packet.SerializeLiteral(w, hints.IsBinary, hints.FileName, epochSeconds)
if err != nil {
return nil, err
}
if signer != nil {
h, wrappedHash, err := hashForSignature(hash, sigType)
if err != nil {
return nil, err
}
metadata := &packet.LiteralData{
Format: 't',
FileName: hints.FileName,
Time: epochSeconds,
}
if hints.IsBinary {
metadata.Format = 'b'
}
return signatureWriter{payload, literalData, hash, wrappedHash, h, signer, sigType, config, metadata}, nil
}
return literalData, nil
}
// encrypt encrypts a message to a number of recipients and, optionally, signs
// it. hints contains optional information, that is also encrypted, that aids
// the recipients in processing the message. The resulting WriteCloser must
// be closed after the contents of the file have been written.
// If config is nil, sensible defaults will be used.
func encrypt(keyWriter io.Writer, dataWriter io.Writer, to []*Entity, signed *Entity, hints *FileHints, sigType packet.SignatureType, config *packet.Config) (plaintext io.WriteCloser, err error) {
if len(to) == 0 {
return nil, errors.InvalidArgumentError("no encryption recipient provided")
}
// These are the possible ciphers that we'll use for the message.
candidateCiphers := []uint8{
uint8(packet.CipherAES128),
uint8(packet.CipherAES256),
uint8(packet.CipherCAST5),
}
// These are the possible hash functions that we'll use for the signature.
candidateHashes := []uint8{
hashToHashId(crypto.SHA256),
hashToHashId(crypto.SHA384),
hashToHashId(crypto.SHA512),
hashToHashId(crypto.SHA1),
hashToHashId(crypto.RIPEMD160),
}
candidateAeadModes := []uint8{
uint8(packet.AEADModeEAX),
uint8(packet.AEADModeOCB),
uint8(packet.AEADModeExperimentalGCM),
}
candidateCompression := []uint8{
uint8(packet.CompressionNone),
uint8(packet.CompressionZIP),
uint8(packet.CompressionZLIB),
}
// In the event that a recipient doesn't specify any supported ciphers
// or hash functions, these are the ones that we assume that every
// implementation supports.
defaultCiphers := candidateCiphers[0:1]
defaultHashes := candidateHashes[0:1]
defaultAeadModes := candidateAeadModes[0:1]
defaultCompression := candidateCompression[0:1]
encryptKeys := make([]Key, len(to))
// AEAD is used only if every key supports it.
aeadSupported := true
for i := range to {
var ok bool
encryptKeys[i], ok = to[i].EncryptionKey(config.Now())
if !ok {
return nil, errors.InvalidArgumentError("cannot encrypt a message to key id " + strconv.FormatUint(to[i].PrimaryKey.KeyId, 16) + " because it has no valid encryption keys")
}
sig := to[i].PrimaryIdentity().SelfSignature
if sig.AEAD == false {
aeadSupported = false
}
preferredSymmetric := sig.PreferredSymmetric
if len(preferredSymmetric) == 0 {
preferredSymmetric = defaultCiphers
}
preferredHashes := sig.PreferredHash
if len(preferredHashes) == 0 {
preferredHashes = defaultHashes
}
preferredAeadModes := sig.PreferredAEAD
if len(preferredAeadModes) == 0 {
preferredAeadModes = defaultAeadModes
}
preferredCompression := sig.PreferredCompression
if len(preferredCompression) == 0 {
preferredCompression = defaultCompression
}
candidateCiphers = intersectPreferences(candidateCiphers, preferredSymmetric)
candidateHashes = intersectPreferences(candidateHashes, preferredHashes)
candidateAeadModes = intersectPreferences(candidateAeadModes, preferredAeadModes)
candidateCompression = intersectPreferences(candidateCompression, preferredCompression)
}
if len(candidateCiphers) == 0 || len(candidateHashes) == 0 || len(candidateAeadModes) == 0 {
return nil, errors.InvalidArgumentError("cannot encrypt because recipient set shares no common algorithms")
}
cipher := packet.CipherFunction(candidateCiphers[0])
mode := packet.AEADMode(candidateAeadModes[0])
// If the cipher specified by config is a candidate, we'll use that.
configuredCipher := config.Cipher()
for _, c := range candidateCiphers {
cipherFunc := packet.CipherFunction(c)
if cipherFunc == configuredCipher {
cipher = cipherFunc
break
}
}
symKey := make([]byte, cipher.KeySize())
if _, err := io.ReadFull(config.Random(), symKey); err != nil {
return nil, err
}
for _, key := range encryptKeys {
if err := packet.SerializeEncryptedKey(keyWriter, key.PublicKey, cipher, symKey, config); err != nil {
return nil, err
}
}
var payload io.WriteCloser
if config.AEAD() != nil && aeadSupported {
payload, err = packet.SerializeAEADEncrypted(dataWriter, symKey, cipher, mode, config)
if err != nil {
return
}
} else {
payload, err = packet.SerializeSymmetricallyEncrypted(dataWriter, cipher, symKey, config)
if err != nil {
return
}
}
payload, err = handleCompression(payload, candidateCompression, config)
if err != nil {
return nil, err
}
return writeAndSign(payload, candidateHashes, signed, hints, sigType, config)
}
// Sign signs a message. The resulting WriteCloser must be closed after the
// contents of the file have been written. hints contains optional information
// that aids the recipients in processing the message.
// If config is nil, sensible defaults will be used.
func Sign(output io.Writer, signed *Entity, hints *FileHints, config *packet.Config) (input io.WriteCloser, err error) {
if signed == nil {
return nil, errors.InvalidArgumentError("no signer provided")
}
// These are the possible hash functions that we'll use for the signature.
candidateHashes := []uint8{
hashToHashId(crypto.SHA256),
hashToHashId(crypto.SHA384),
hashToHashId(crypto.SHA512),
hashToHashId(crypto.SHA1),
hashToHashId(crypto.RIPEMD160),
}
defaultHashes := candidateHashes[0:1]
preferredHashes := signed.PrimaryIdentity().SelfSignature.PreferredHash
if len(preferredHashes) == 0 {
preferredHashes = defaultHashes
}
candidateHashes = intersectPreferences(candidateHashes, preferredHashes)
if len(candidateHashes) == 0 {
return nil, errors.InvalidArgumentError("cannot sign because signing key shares no common algorithms with candidate hashes")
}
return writeAndSign(noOpCloser{output}, candidateHashes, signed, hints, packet.SigTypeBinary, config)
}
// signatureWriter hashes the contents of a message while passing it along to
// literalData. When closed, it closes literalData, writes a signature packet
// to encryptedData and then also closes encryptedData.
type signatureWriter struct {
encryptedData io.WriteCloser
literalData io.WriteCloser
hashType crypto.Hash
wrappedHash hash.Hash
h hash.Hash
signer *packet.PrivateKey
sigType packet.SignatureType
config *packet.Config
metadata *packet.LiteralData // V5 signatures protect document metadata
}
func (s signatureWriter) Write(data []byte) (int, error) {
s.wrappedHash.Write(data)
switch s.sigType {
case packet.SigTypeBinary:
return s.literalData.Write(data)
case packet.SigTypeText:
flag := 0
return writeCanonical(s.literalData, data, &flag)
}
return 0, errors.UnsupportedError("unsupported signature type: " + strconv.Itoa(int(s.sigType)))
}
func (s signatureWriter) Close() error {
sig := &packet.Signature{
Version: s.signer.Version,
SigType: s.sigType,
PubKeyAlgo: s.signer.PubKeyAlgo,
Hash: s.hashType,
CreationTime: s.config.Now(),
IssuerKeyId: &s.signer.KeyId,
Metadata: s.metadata,
}
if err := sig.Sign(s.h, s.signer, s.config); err != nil {
return err
}
if err := s.literalData.Close(); err != nil {
return err
}
if err := sig.Serialize(s.encryptedData); err != nil {
return err
}
return s.encryptedData.Close()
}
// noOpCloser is like an ioutil.NopCloser, but for an io.Writer.
// TODO: we have two of these in OpenPGP packages alone. This probably needs
// to be promoted somewhere more common.
type noOpCloser struct {
w io.Writer
}
func (c noOpCloser) Write(data []byte) (n int, err error) {
return c.w.Write(data)
}
func (c noOpCloser) Close() error {
return nil
}
func handleCompression(compressed io.WriteCloser, candidateCompression []uint8, config *packet.Config) (data io.WriteCloser, err error) {
data = compressed
confAlgo := config.Compression()
if confAlgo == packet.CompressionNone {
return
}
finalAlgo := packet.CompressionNone
// if compression specified by config available we will use it
for _, c := range candidateCompression {
if uint8(confAlgo) == c {
finalAlgo = confAlgo
break
}
}
if finalAlgo != packet.CompressionNone {
var compConfig *packet.CompressionConfig
if config != nil {
compConfig = config.CompressionConfig
}
data, err = packet.SerializeCompressed(compressed, finalAlgo, compConfig)
if err != nil {
return
}
}
return data, nil
}

42
vendor/github.com/acomagu/bufpipe/README.md generated vendored Normal file
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# bufpipe: Buffered Pipe
[![CircleCI](https://img.shields.io/circleci/build/github/acomagu/bufpipe.svg?style=flat-square)](https://circleci.com/gh/acomagu/bufpipe) [![GoDoc](https://img.shields.io/badge/godoc-reference-blue.svg?style=flat-square)](https://godoc.org/github.com/acomagu/bufpipe)
The buffered version of io.Pipe. It's safe for concurrent use.
## How does it differ from io.Pipe?
Writes never block because the pipe has variable-sized buffer.
```Go
r, w := bufpipe.New(nil)
io.WriteString(w, "abc") // No blocking.
io.WriteString(w, "def") // No blocking, too.
w.Close()
io.Copy(os.Stdout, r)
// Output: abcdef
```
[Playground](https://play.golang.org/p/PdyBAS3pVob)
## How does it differ from bytes.Buffer?
Reads block if the internal buffer is empty until the writer is closed.
```Go
r, w := bufpipe.New(nil)
done := make(chan struct{})
go func() {
io.Copy(os.Stdout, r) // The reads block until the writer is closed.
done <- struct{}{}
}()
io.WriteString(w, "abc")
io.WriteString(w, "def")
w.Close()
<-done
// Output: abcdef
```
[Playground](https://play.golang.org/p/UppmyLeRgX6)

128
vendor/github.com/acomagu/bufpipe/bufpipe.go generated vendored Normal file
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package bufpipe
import (
"bytes"
"errors"
"io"
"sync"
)
// ErrClosedPipe is the error used for read or write operations on a closed pipe.
var ErrClosedPipe = errors.New("bufpipe: read/write on closed pipe")
type pipe struct {
cond *sync.Cond
buf *bytes.Buffer
rerr, werr error
}
// A PipeReader is the read half of a pipe.
type PipeReader struct {
*pipe
}
// A PipeWriter is the write half of a pipe.
type PipeWriter struct {
*pipe
}
// New creates a synchronous pipe using buf as its initial contents. It can be
// used to connect code expecting an io.Reader with code expecting an io.Writer.
//
// Unlike io.Pipe, writes never block because the internal buffer has variable
// size. Reads block only when the buffer is empty.
//
// It is safe to call Read and Write in parallel with each other or with Close.
// Parallel calls to Read and parallel calls to Write are also safe: the
// individual calls will be gated sequentially.
//
// The new pipe takes ownership of buf, and the caller should not use buf after
// this call. New is intended to prepare a PipeReader to read existing data. It
// can also be used to set the initial size of the internal buffer for writing.
// To do that, buf should have the desired capacity but a length of zero.
func New(buf []byte) (*PipeReader, *PipeWriter) {
p := &pipe{
buf: bytes.NewBuffer(buf),
cond: sync.NewCond(new(sync.Mutex)),
}
return &PipeReader{
pipe: p,
}, &PipeWriter{
pipe: p,
}
}
// Read implements the standard Read interface: it reads data from the pipe,
// reading from the internal buffer, otherwise blocking until a writer arrives
// or the write end is closed. If the write end is closed with an error, that
// error is returned as err; otherwise err is io.EOF.
func (r *PipeReader) Read(data []byte) (int, error) {
r.cond.L.Lock()
defer r.cond.L.Unlock()
RETRY:
n, err := r.buf.Read(data)
// If not closed and no read, wait for writing.
if err == io.EOF && r.rerr == nil && n == 0 {
r.cond.Wait()
goto RETRY
}
if err == io.EOF {
return n, r.rerr
}
return n, err
}
// Close closes the reader; subsequent writes from the write half of the pipe
// will return error ErrClosedPipe.
func (r *PipeReader) Close() error {
return r.CloseWithError(nil)
}
// CloseWithError closes the reader; subsequent writes to the write half of the
// pipe will return the error err.
func (r *PipeReader) CloseWithError(err error) error {
r.cond.L.Lock()
defer r.cond.L.Unlock()
if err == nil {
err = ErrClosedPipe
}
r.werr = err
return nil
}
// Write implements the standard Write interface: it writes data to the internal
// buffer. If the read end is closed with an error, that err is returned as err;
// otherwise err is ErrClosedPipe.
func (w *PipeWriter) Write(data []byte) (int, error) {
w.cond.L.Lock()
defer w.cond.L.Unlock()
if w.werr != nil {
return 0, w.werr
}
n, err := w.buf.Write(data)
w.cond.Signal()
return n, err
}
// Close closes the writer; subsequent reads from the read half of the pipe will
// return io.EOF once the internal buffer get empty.
func (w *PipeWriter) Close() error {
return w.CloseWithError(nil)
}
// Close closes the writer; subsequent reads from the read half of the pipe will
// return err once the internal buffer get empty.
func (w *PipeWriter) CloseWithError(err error) error {
w.cond.L.Lock()
defer w.cond.L.Unlock()
if err == nil {
err = io.EOF
}
w.rerr = err
return nil
}

2
vendor/github.com/acomagu/bufpipe/doc.go generated vendored Normal file
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@@ -0,0 +1,2 @@
// Package bufpipe provides a IO pipe, has variable-sized buffer.
package bufpipe

57
vendor/github.com/cloudflare/circl/LICENSE generated vendored Normal file
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@@ -0,0 +1,57 @@
Copyright (c) 2019 Cloudflare. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following disclaimer
in the documentation and/or other materials provided with the
distribution.
* Neither the name of Cloudflare nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
========================================================================
Copyright (c) 2009 The Go Authors. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following disclaimer
in the documentation and/or other materials provided with the
distribution.
* Neither the name of Google Inc. nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

96
vendor/github.com/cloudflare/circl/dh/x25519/curve.go generated vendored Normal file
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package x25519
import (
fp "github.com/cloudflare/circl/math/fp25519"
)
// ladderJoye calculates a fixed-point multiplication with the generator point.
// The algorithm is the right-to-left Joye's ladder as described
// in "How to precompute a ladder" in SAC'2017.
func ladderJoye(k *Key) {
w := [5]fp.Elt{} // [mu,x1,z1,x2,z2] order must be preserved.
fp.SetOne(&w[1]) // x1 = 1
fp.SetOne(&w[2]) // z1 = 1
w[3] = fp.Elt{ // x2 = G-S
0xbd, 0xaa, 0x2f, 0xc8, 0xfe, 0xe1, 0x94, 0x7e,
0xf8, 0xed, 0xb2, 0x14, 0xae, 0x95, 0xf0, 0xbb,
0xe2, 0x48, 0x5d, 0x23, 0xb9, 0xa0, 0xc7, 0xad,
0x34, 0xab, 0x7c, 0xe2, 0xee, 0xcd, 0xae, 0x1e,
}
fp.SetOne(&w[4]) // z2 = 1
const n = 255
const h = 3
swap := uint(1)
for s := 0; s < n-h; s++ {
i := (s + h) / 8
j := (s + h) % 8
bit := uint((k[i] >> uint(j)) & 1)
copy(w[0][:], tableGenerator[s*Size:(s+1)*Size])
diffAdd(&w, swap^bit)
swap = bit
}
for s := 0; s < h; s++ {
double(&w[1], &w[2])
}
toAffine((*[fp.Size]byte)(k), &w[1], &w[2])
}
// ladderMontgomery calculates a generic scalar point multiplication
// The algorithm implemented is the left-to-right Montgomery's ladder.
func ladderMontgomery(k, xP *Key) {
w := [5]fp.Elt{} // [x1, x2, z2, x3, z3] order must be preserved.
w[0] = *(*fp.Elt)(xP) // x1 = xP
fp.SetOne(&w[1]) // x2 = 1
w[3] = *(*fp.Elt)(xP) // x3 = xP
fp.SetOne(&w[4]) // z3 = 1
move := uint(0)
for s := 255 - 1; s >= 0; s-- {
i := s / 8
j := s % 8
bit := uint((k[i] >> uint(j)) & 1)
ladderStep(&w, move^bit)
move = bit
}
toAffine((*[fp.Size]byte)(k), &w[1], &w[2])
}
func toAffine(k *[fp.Size]byte, x, z *fp.Elt) {
fp.Inv(z, z)
fp.Mul(x, x, z)
_ = fp.ToBytes(k[:], x)
}
var lowOrderPoints = [5]fp.Elt{
{ /* (0,_,1) point of order 2 on Curve25519 */
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
},
{ /* (1,_,1) point of order 4 on Curve25519 */
0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
},
{ /* (x,_,1) first point of order 8 on Curve25519 */
0xe0, 0xeb, 0x7a, 0x7c, 0x3b, 0x41, 0xb8, 0xae,
0x16, 0x56, 0xe3, 0xfa, 0xf1, 0x9f, 0xc4, 0x6a,
0xda, 0x09, 0x8d, 0xeb, 0x9c, 0x32, 0xb1, 0xfd,
0x86, 0x62, 0x05, 0x16, 0x5f, 0x49, 0xb8, 0x00,
},
{ /* (x,_,1) second point of order 8 on Curve25519 */
0x5f, 0x9c, 0x95, 0xbc, 0xa3, 0x50, 0x8c, 0x24,
0xb1, 0xd0, 0xb1, 0x55, 0x9c, 0x83, 0xef, 0x5b,
0x04, 0x44, 0x5c, 0xc4, 0x58, 0x1c, 0x8e, 0x86,
0xd8, 0x22, 0x4e, 0xdd, 0xd0, 0x9f, 0x11, 0x57,
},
{ /* (-1,_,1) a point of order 4 on the twist of Curve25519 */
0xec, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x7f,
},
}

30
vendor/github.com/cloudflare/circl/dh/x25519/curve_amd64.go generated vendored Normal file
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//go:build amd64 && !purego
// +build amd64,!purego
package x25519
import (
fp "github.com/cloudflare/circl/math/fp25519"
"golang.org/x/sys/cpu"
)
var hasBmi2Adx = cpu.X86.HasBMI2 && cpu.X86.HasADX
var _ = hasBmi2Adx
func double(x, z *fp.Elt) { doubleAmd64(x, z) }
func diffAdd(w *[5]fp.Elt, b uint) { diffAddAmd64(w, b) }
func ladderStep(w *[5]fp.Elt, b uint) { ladderStepAmd64(w, b) }
func mulA24(z, x *fp.Elt) { mulA24Amd64(z, x) }
//go:noescape
func ladderStepAmd64(w *[5]fp.Elt, b uint)
//go:noescape
func diffAddAmd64(w *[5]fp.Elt, b uint)
//go:noescape
func doubleAmd64(x, z *fp.Elt)
//go:noescape
func mulA24Amd64(z, x *fp.Elt)

111
vendor/github.com/cloudflare/circl/dh/x25519/curve_amd64.h generated vendored Normal file
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#define ladderStepLeg \
addSub(x2,z2) \
addSub(x3,z3) \
integerMulLeg(b0,x2,z3) \
integerMulLeg(b1,x3,z2) \
reduceFromDoubleLeg(t0,b0) \
reduceFromDoubleLeg(t1,b1) \
addSub(t0,t1) \
cselect(x2,x3,regMove) \
cselect(z2,z3,regMove) \
integerSqrLeg(b0,t0) \
integerSqrLeg(b1,t1) \
reduceFromDoubleLeg(x3,b0) \
reduceFromDoubleLeg(z3,b1) \
integerMulLeg(b0,x1,z3) \
reduceFromDoubleLeg(z3,b0) \
integerSqrLeg(b0,x2) \
integerSqrLeg(b1,z2) \
reduceFromDoubleLeg(x2,b0) \
reduceFromDoubleLeg(z2,b1) \
subtraction(t0,x2,z2) \
multiplyA24Leg(t1,t0) \
additionLeg(t1,t1,z2) \
integerMulLeg(b0,x2,z2) \
integerMulLeg(b1,t0,t1) \
reduceFromDoubleLeg(x2,b0) \
reduceFromDoubleLeg(z2,b1)
#define ladderStepBmi2Adx \
addSub(x2,z2) \
addSub(x3,z3) \
integerMulAdx(b0,x2,z3) \
integerMulAdx(b1,x3,z2) \
reduceFromDoubleAdx(t0,b0) \
reduceFromDoubleAdx(t1,b1) \
addSub(t0,t1) \
cselect(x2,x3,regMove) \
cselect(z2,z3,regMove) \
integerSqrAdx(b0,t0) \
integerSqrAdx(b1,t1) \
reduceFromDoubleAdx(x3,b0) \
reduceFromDoubleAdx(z3,b1) \
integerMulAdx(b0,x1,z3) \
reduceFromDoubleAdx(z3,b0) \
integerSqrAdx(b0,x2) \
integerSqrAdx(b1,z2) \
reduceFromDoubleAdx(x2,b0) \
reduceFromDoubleAdx(z2,b1) \
subtraction(t0,x2,z2) \
multiplyA24Adx(t1,t0) \
additionAdx(t1,t1,z2) \
integerMulAdx(b0,x2,z2) \
integerMulAdx(b1,t0,t1) \
reduceFromDoubleAdx(x2,b0) \
reduceFromDoubleAdx(z2,b1)
#define difAddLeg \
addSub(x1,z1) \
integerMulLeg(b0,z1,ui) \
reduceFromDoubleLeg(z1,b0) \
addSub(x1,z1) \
integerSqrLeg(b0,x1) \
integerSqrLeg(b1,z1) \
reduceFromDoubleLeg(x1,b0) \
reduceFromDoubleLeg(z1,b1) \
integerMulLeg(b0,x1,z2) \
integerMulLeg(b1,z1,x2) \
reduceFromDoubleLeg(x1,b0) \
reduceFromDoubleLeg(z1,b1)
#define difAddBmi2Adx \
addSub(x1,z1) \
integerMulAdx(b0,z1,ui) \
reduceFromDoubleAdx(z1,b0) \
addSub(x1,z1) \
integerSqrAdx(b0,x1) \
integerSqrAdx(b1,z1) \
reduceFromDoubleAdx(x1,b0) \
reduceFromDoubleAdx(z1,b1) \
integerMulAdx(b0,x1,z2) \
integerMulAdx(b1,z1,x2) \
reduceFromDoubleAdx(x1,b0) \
reduceFromDoubleAdx(z1,b1)
#define doubleLeg \
addSub(x1,z1) \
integerSqrLeg(b0,x1) \
integerSqrLeg(b1,z1) \
reduceFromDoubleLeg(x1,b0) \
reduceFromDoubleLeg(z1,b1) \
subtraction(t0,x1,z1) \
multiplyA24Leg(t1,t0) \
additionLeg(t1,t1,z1) \
integerMulLeg(b0,x1,z1) \
integerMulLeg(b1,t0,t1) \
reduceFromDoubleLeg(x1,b0) \
reduceFromDoubleLeg(z1,b1)
#define doubleBmi2Adx \
addSub(x1,z1) \
integerSqrAdx(b0,x1) \
integerSqrAdx(b1,z1) \
reduceFromDoubleAdx(x1,b0) \
reduceFromDoubleAdx(z1,b1) \
subtraction(t0,x1,z1) \
multiplyA24Adx(t1,t0) \
additionAdx(t1,t1,z1) \
integerMulAdx(b0,x1,z1) \
integerMulAdx(b1,t0,t1) \
reduceFromDoubleAdx(x1,b0) \
reduceFromDoubleAdx(z1,b1)

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