Merge branch 'feature/ca-pinning' of https://github.com/seccubus/testssl.sh into seccubus-feature/ca-pinning
This commit is contained in:
Dirk Wetter
commit
535c37fbb3
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@ -0,0 +1,79 @@
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#!/usr/bin/env perl
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use strict;
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use Test::More;
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use Data::Dumper;
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use JSON;
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my $tests = 0;
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my (
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$out,
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$json,
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$found,
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);
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# OK
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pass("Running testssl.sh against ssl.sectionzero.org"); $tests++;
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$out = `./testssl.sh -H --jsonfile tmp.json --color 0 ssl.sectionzero.org`;
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$json = json('tmp.json');
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# It is better to have findings in a hash
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# Look for a leaf cert match in the process.
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my $found = 0;
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my %findings;
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foreach my $f ( @$json ) {
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$findings{$f->{id}} = $f;
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if ( $f->{finding} =~ /matches the leaf certificate/ ) {
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$found++;
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}
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}
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is($found,1,"We found 1 'matches the leaf certificate' finding"); $tests++;
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like($out,'/Leaf cert match/',"There is a 'Leaf cert match' in the text output"); $tests++;
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# Sub CA match
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ok( exists $findings{"hpkp_YLh1dUR9y6Kja30RrAn7JKnbQG/uEtLMkBgFF2Fuihg"},"We have a finding for key YLh1dUR9y6Kja30RrAn7JKnbQG/uEtLMkBgFF2Fuihg"); $tests++;
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like($findings{"hpkp_YLh1dUR9y6Kja30RrAn7JKnbQG/uEtLMkBgFF2Fuihg"}->{finding},'/Intermediate CA key matches a key pinned in the HPKP header/',"We have our Sub CA finding"); $tests++;
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is($findings{"hpkp_YLh1dUR9y6Kja30RrAn7JKnbQG/uEtLMkBgFF2Fuihg"}->{severity}, "OK", "The finding is ok"); $tests++;
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like($out,'/Sub CA match \: YLh1dUR9y6Kja30RrAn7JKnbQG\/uEtLMkBgFF2Fuihg/',"There is a 'Sub CA match' in the text output"); $tests++;
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# Root CA match Lets encrypt
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ok( exists $findings{"hpkp_Vjs8r4z+80wjNcr1YKepWQboSIRi63WsWXhIMN+eWys"},"We have a finding for key Vjs8r4z+80wjNcr1YKepWQboSIRi63WsWXhIMN+eWys"); $tests++;
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like($findings{"hpkp_Vjs8r4z+80wjNcr1YKepWQboSIRi63WsWXhIMN+eWys"}->{finding},'/Root CA key matches a key pinned in the HPKP header/',"This is a Root CA finding"); $tests++;
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like($findings{"hpkp_Vjs8r4z+80wjNcr1YKepWQboSIRi63WsWXhIMN+eWys"}->{finding},'/DST Root CA X3/',"Correct Root CA"); $tests++;
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like($findings{"hpkp_Vjs8r4z+80wjNcr1YKepWQboSIRi63WsWXhIMN+eWys"}->{finding},'/The CA is part of the chain/',"CA is indeed part of chain"); $tests++;
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is($findings{"hpkp_Vjs8r4z+80wjNcr1YKepWQboSIRi63WsWXhIMN+eWys"}->{severity}, "OK", "The finding is ok"); $tests++;
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like($out,'/Root CA match \: Vjs8r4z\+80wjNcr1YKepWQboSIRi63WsWXhIMN\+eWys/',"There is a 'Root CA match' in the text output"); $tests++;
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# Root CA StartCom
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ok( exists $findings{"hpkp_5C8kvU039KouVrl52D0eZSGf4Onjo4Khs8tmyTlV3nU"},"We have a finding for key 5C8kvU039KouVrl52D0eZSGf4Onjo4Khs8tmyTlV3nU"); $tests++;
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like($findings{"hpkp_5C8kvU039KouVrl52D0eZSGf4Onjo4Khs8tmyTlV3nU"}->{finding},'/Root CA key matches a key pinned in the HPKP header/',"This is a Root CA finding"); $tests++;
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like($findings{"hpkp_5C8kvU039KouVrl52D0eZSGf4Onjo4Khs8tmyTlV3nU"}->{finding},'/StartCom Certification Authority/',"Correct Root CA"); $tests++;
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like($findings{"hpkp_5C8kvU039KouVrl52D0eZSGf4Onjo4Khs8tmyTlV3nU"}->{finding},'/The CA is not part of the chain/',"CA is indeed NOT part of chain"); $tests++;
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is($findings{"hpkp_5C8kvU039KouVrl52D0eZSGf4Onjo4Khs8tmyTlV3nU"}->{severity}, "OK", "The finding is ok"); $tests++;
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like($out,'/Root CA match \: 5C8kvU039KouVrl52D0eZSGf4Onjo4Khs8tmyTlV3nU/',"There is a 'Root CA match' in the text output"); $tests++;
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# Bad PIN
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ok( exists $findings{"hpkp_123bad123bad123bad123bad123bad123bd123bad12"},"We have a finding for key 123bad123bad123bad123bad123bad123bd123bad12"); $tests++;
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like($findings{"hpkp_123bad123bad123bad123bad123bad123bd123bad12"}->{finding},'/doesn\'t match anything/',"It doesn't match indeed"); $tests++;
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is($findings{"hpkp_123bad123bad123bad123bad123bad123bd123bad12"}->{severity}, "WARN", "The finding is ok"); $tests++;
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like($out,'/Unmatched key : 123bad123bad123bad123bad123bad123bd123bad12/',"There is an 'unmatched key' in the text output"); $tests++;
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like($findings{hpkp_keys}->{finding},'/5 keys pinned/',"5 keys pinned in json"); $tests++;
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like($out,'/\# of keys: 5/',"5 keys pinned in text output"); $tests++;
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like($findings{hpkp_age}->{finding},'/90 days/',"90 days in json"); $tests++;
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like($out,'/90 days/',"90 days in text output"); $tests++;
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like($findings{hpkp_subdomains}->{finding},'/this domain only/',"this domain only in json"); $tests++;
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like($out,'/just this domain/',"just this domain text output"); $tests++;
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like($findings{hpkp_preload}->{finding},'/NOT marked for/',"no preloading in json"); $tests++;
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done_testing($tests);
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sub json($) {
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my $file = shift;
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$file = `cat $file`;
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unlink $file;
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return from_json($file);
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}
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131
testssl.sh
131
testssl.sh
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@ -483,7 +483,7 @@ fileout() { # ID, SEVERITY, FINDING
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if "$do_json"; then
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"$FIRST_FINDING" || echo -n "," >> $JSONFILE
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echo -e " {
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echo " {
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\"id\" : \"$1\",
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\"ip\" : \"$NODE/$NODEIP\",
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\"port\" : \"$PORT\",
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@ -963,6 +963,7 @@ run_hpkp() {
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local i
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local hpkp_headers
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local first_hpkp_header
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local ca_bundles="$INSTALL_DIR/etc/*.pem"
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if [[ ! -s $HEADERFILE ]]; then
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run_http_header "$1" || return 3
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@ -1029,27 +1030,135 @@ run_hpkp() {
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fileout "hpkp_preload" "INFO" "HPKP header is NOT marked for browser preloading"
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fi
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# Get the pins first
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pins=$(tr ';' '\n' < $TMPFILE | tr -d ' ' | tr -d '\"' | awk -F'=' '/pin.*=/ { print $2 }')
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# Look at the host certificate first
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# get the key fingerprint from the host certificate
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if [[ ! -s "$HOSTCERT" ]]; then
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get_host_cert || return 1
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fi
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# get the key fingerprint from the host certificate
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hpkp_key_hostcert="$($OPENSSL x509 -in $HOSTCERT -pubkey -noout | grep -v PUBLIC | \
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$OPENSSL base64 -d | $OPENSSL dgst -sha256 -binary | $OPENSSL base64)"
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# compare it with the ones provided in the header
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while read hpkp_key; do
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hpkp_ca="$($OPENSSL x509 -in $HOSTCERT -issuer -noout|sed 's/^.*CN=//' | sed 's/\/.*$//')"
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# Get keys/hashes from intermediate certificates
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$OPENSSL s_client -showcerts $STARTTLS $BUGS $PROXY -showcerts -connect $NODEIP:$PORT ${sni[i]} </dev/null >$TMPFILE 2>$ERRFILE
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# Place the server's certificate in $HOSTCERT and any intermediate
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# certificates that were provided in $TEMPDIR/intermediatecerts.pem
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# http://backreference.org/2010/05/09/ocsp-verification-with-openssl/
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awk -v n=-1 "/Certificate chain/ {start=1}
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/-----BEGIN CERTIFICATE-----/{ if (start) {inc=1; n++} }
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inc { print > (\"$TEMPDIR/level\" n \".crt\") }
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/---END CERTIFICATE-----/{ inc=0 }" $TMPFILE
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nrsaved=$(count_words "$(echo $TEMPDIR/level?.crt 2>/dev/null)")
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rm $TEMPDIR/level0.crt
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if [[ nrsaved -ge 2 ]]; then
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echo -n "" > "$TEMPDIR/intermediate.hashes"
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for cert_fname in $TEMPDIR/level?.crt; do
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hpkp_key_ca="$($OPENSSL x509 -in "$cert_fname" -pubkey -noout | grep -v PUBLIC | $OPENSSL base64 -d |
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$OPENSSL dgst -sha256 -binary | $OPENSSL enc -base64)"
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hpkp_name="$(get_cn_from_cert $cert_fname)"
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hpkp_ca="$($OPENSSL x509 -in $cert_fname -issuer -noout|sed 's/^.*CN=//' | sed 's/\/.*$//')"
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[[ -n $hpkp_name ]] || hpkp_name=$($OPENSSL x509 -in "$cert_fname" -subject -noout | sed 's/^subject= //')
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echo "$hpkp_key_ca $hpkp_name" >> "$TEMPDIR/intermediate.hashes"
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done
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fi
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rm $TEMPDIR/level*.crt
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# Get keys from Root CAs
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# Clear temp file
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echo -n "" > "$TEMPDIR/cahashes"
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for bundle_fname in $ca_bundles; do
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if [[ ! -r $bundle_fname ]]; then
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pr_warningln "\"$bundle_fname\" cannot be found / not readable"
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return 7
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fi
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# Split up the certificate bundle
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awk -v n=-1 "BEGIN {start=1}
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/-----BEGIN CERTIFICATE-----/{ if (start) {inc=1; n++} }
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inc { print >> (\"$TEMPDIR/$bundle_name.\" n \".crt\") ; close (\"$TEMPDIR/$bundle_name.\" n \".crt\") }
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/---END CERTIFICATE-----/{ inc=0 }" $bundle_fname
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for cert_fname in $TEMPDIR/$bundle_name.*.crt; do
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hpkp_key_ca="$($OPENSSL x509 -in "$cert_fname" -pubkey -noout | grep -v PUBLIC | $OPENSSL base64 -d |
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$OPENSSL dgst -sha256 -binary | $OPENSSL enc -base64)"
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issuer=$(get_cn_from_cert $cert_fname)
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[[ -n $hpkp_name ]] || hpkp_name=$($OPENSSL x509 -in "$cert_fname" -subject -noout| sed "s/^subject= //")
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echo "$hpkp_key_ca $issuer" >> "$TEMPDIR/cahashes"
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done
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done
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pins_match=false
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for hpkp_key in $(echo $pins); do
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key_found=false
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# compare pin against the leaf certificate
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if [[ "$hpkp_key_hostcert" == "$hpkp_key" ]] || [[ "$hpkp_key_hostcert" == "$hpkp_key=" ]]; then
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out "\n$spaces matching host key: "
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out "\n\n$spaces Leaf cert match : "
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pr_done_good "$hpkp_key"
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fileout "hpkp_keymatch" "OK" "Key matches a key pinned in the HPKP header"
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fileout "hpkp_$hpkp_key" "OK" "PIN $hpkp_key matches the leaf certificate"
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key_found=true
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pins_match=true
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fi
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debugme out "\n $hpkp_key | $hpkp_key_hostcert"
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done < <(tr ';' '\n' < $TMPFILE | tr -d ' ' | tr -d '\"' | awk -F'=' '/pin.*=/ { print $2 }')
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# Check for intermediate match
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if ! $key_found ; then
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out "\n$spaces"
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hpkp_matches=$(grep "$hpkp_key" $TEMPDIR/intermediate.hashes)
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if [[ -n $hpkp_matches ]]; then
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# We have a winner!
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key_found=true
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pins_match=true
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out "\n\n$spaces Sub CA match : "
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pr_done_good "$hpkp_key"
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out "\n$spaces $(echo $hpkp_matches|sed "s/^[a-zA-Z0-9\+\/]*=* *//")"
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fileout "hpkp_$hpkp_key" "OK" "Intermediate CA key matches a key pinned in the HPKP header.\\nKey/CA: $hpkp_matches"
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fi
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fi
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if ! $key_found ; then
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hpkp_matches=$(grep -h "$hpkp_key" $TEMPDIR/cahashes | sort -u)
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if [[ -n $hpkp_matches ]]; then
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# We have a winner!
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key_found=true
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pins_match=true
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if [[ $(count_lines "$hpkp_matches") -eq 1 ]]; then
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match_ca=$(echo "$hpkp_matches" | sed "s/[a-zA-Z0-9\+\/]*=* *//")
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else
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match_ca=""
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fi
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out "\n\n$spaces Root CA match : "
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pr_done_good "$hpkp_key"
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echo "$hpkp_matches"|sort -u|while read line; do
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out "\n$spaces $(echo $line |sed "s/^[a-zA-Z0-9\+\/]*=* *//")"
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done
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if [[ $match_ca == $hpkp_ca ]]; then
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pr_done_good "\n$spaces This CA is part of the chain"
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fileout "hpkp_$hpkp_key" "OK" "Root CA key matches a key pinned in the HPKP header\\nKey/OS/CA: $hpkp_matches\\nThe CA is part of the chain"
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else
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out "\n$spaces This CA is not part of the chain and likely a backup PIN"
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fileout "hpkp_$hpkp_key" "OK" "Root CA key matches a key pinned in the HPKP header\\nKey/OS/CA: $hpkp_matches\\nThe CA is not part of the chain, this is a backup PIN"
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fi
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fi
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fi
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if ! $key_found ; then
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# Houston we may have a problem
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out "\n\n$spaces Unmatched key : "
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pr_warning "$hpkp_key"
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out "\n$spaces ( This is OK for a backup pin of a leaf cert )"
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fileout "hpkp_$hpkp_key" "WARN" "PIN $hpkp_key doesn't match anything.\nThis could be ok if it is a backup pin for a leaf certificate"
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fi
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done
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# If all else fails...
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if ! $pins_match ; then
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pr_svrty_high " No matching key for pins found "
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out "(CAs pinned? -- not checked for yet)"
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fileout "hpkp_keymatch" "DEBUG" "The TLS key does not match any key pinned in the HPKP header. If you pinned a CA key you can ignore this"
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fileout "hpkp_keymatch" "NOT ok" "None of the HPKP PINS match your leaf certificate, intermediate CA or known root CAs. You may have bricked this site"
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fi
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else
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out "--"
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@ -6809,7 +6918,6 @@ check4openssl_oldfarts() {
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outln
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}
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# FreeBSD needs to have /dev/fd mounted. This is a friendly hint, see #258
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check_bsd_mount() {
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if [[ "$(uname)" == FreeBSD ]]; then
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@ -6823,7 +6931,6 @@ check_bsd_mount() {
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fi
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}
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help() {
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cat << EOF
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