mirror of
https://github.com/cheat/cheat.git
synced 2026-03-07 19:23:34 +01:00
chore: modernize CI and update Go toolchain
- Bump Go from 1.19 to 1.26 and update all dependencies - Rewrite CI workflow with matrix strategy (Linux, macOS, Windows) - Update GitHub Actions to current versions (checkout@v4, setup-go@v5) - Update CodeQL actions from v1 to v3 - Fix cross-platform bug in mock/path.go (path.Join -> filepath.Join) - Clean up dependabot config (weekly schedule, remove stale ignore) Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Christopher Allen Lane
155
vendor/golang.org/x/crypto/ssh/kex.go
generated
vendored
155
vendor/golang.org/x/crypto/ssh/kex.go
generated
vendored
@@ -8,33 +8,31 @@ import (
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"crypto"
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"crypto/ecdsa"
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"crypto/elliptic"
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"crypto/fips140"
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"crypto/rand"
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"crypto/subtle"
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"encoding/binary"
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"errors"
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"fmt"
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"io"
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"math/big"
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"slices"
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"golang.org/x/crypto/curve25519"
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)
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const (
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kexAlgoDH1SHA1 = "diffie-hellman-group1-sha1"
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kexAlgoDH14SHA1 = "diffie-hellman-group14-sha1"
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kexAlgoDH14SHA256 = "diffie-hellman-group14-sha256"
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kexAlgoDH16SHA512 = "diffie-hellman-group16-sha512"
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kexAlgoECDH256 = "ecdh-sha2-nistp256"
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kexAlgoECDH384 = "ecdh-sha2-nistp384"
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kexAlgoECDH521 = "ecdh-sha2-nistp521"
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kexAlgoCurve25519SHA256LibSSH = "curve25519-sha256@libssh.org"
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kexAlgoCurve25519SHA256 = "curve25519-sha256"
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// For the following kex only the client half contains a production
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// ready implementation. The server half only consists of a minimal
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// implementation to satisfy the automated tests.
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kexAlgoDHGEXSHA1 = "diffie-hellman-group-exchange-sha1"
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kexAlgoDHGEXSHA256 = "diffie-hellman-group-exchange-sha256"
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// This is the group called diffie-hellman-group1-sha1 in RFC 4253 and
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// Oakley Group 2 in RFC 2409.
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oakleyGroup2 = "FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E088A67CC74020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7EDEE386BFB5A899FA5AE9F24117C4B1FE649286651ECE65381FFFFFFFFFFFFFFFF"
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// This is the group called diffie-hellman-group14-sha1 in RFC 4253 and
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// Oakley Group 14 in RFC 3526.
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oakleyGroup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// This is the group called diffie-hellman-group15-sha512 in RFC 8268 and
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// Oakley Group 15 in RFC 3526.
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oakleyGroup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// This is the group called diffie-hellman-group16-sha512 in RFC 8268 and
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// Oakley Group 16 in RFC 3526.
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oakleyGroup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)
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// kexResult captures the outcome of a key exchange.
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@@ -399,56 +397,64 @@ func ecHash(curve elliptic.Curve) crypto.Hash {
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return crypto.SHA512
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}
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// kexAlgoMap defines the supported KEXs. KEXs not included are not supported
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// and will not be negotiated, even if explicitly configured. When FIPS mode is
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// enabled, only FIPS-approved algorithms are included.
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var kexAlgoMap = map[string]kexAlgorithm{}
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func init() {
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// This is the group called diffie-hellman-group1-sha1 in
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// RFC 4253 and Oakley Group 2 in RFC 2409.
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p, _ := new(big.Int).SetString("FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E088A67CC74020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7EDEE386BFB5A899FA5AE9F24117C4B1FE649286651ECE65381FFFFFFFFFFFFFFFF", 16)
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kexAlgoMap[kexAlgoDH1SHA1] = &dhGroup{
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// mlkem768x25519-sha256 we'll work with fips140=on but not fips140=only
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// until Go 1.26.
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kexAlgoMap[KeyExchangeMLKEM768X25519] = &mlkem768WithCurve25519sha256{}
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kexAlgoMap[KeyExchangeECDHP521] = &ecdh{elliptic.P521()}
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kexAlgoMap[KeyExchangeECDHP384] = &ecdh{elliptic.P384()}
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kexAlgoMap[KeyExchangeECDHP256] = &ecdh{elliptic.P256()}
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if fips140.Enabled() {
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defaultKexAlgos = slices.DeleteFunc(defaultKexAlgos, func(algo string) bool {
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_, ok := kexAlgoMap[algo]
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return !ok
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})
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return
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}
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p, _ := new(big.Int).SetString(oakleyGroup2, 16)
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kexAlgoMap[InsecureKeyExchangeDH1SHA1] = &dhGroup{
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g: new(big.Int).SetInt64(2),
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p: p,
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pMinus1: new(big.Int).Sub(p, bigOne),
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hashFunc: crypto.SHA1,
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}
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// This are the groups called diffie-hellman-group14-sha1 and
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// diffie-hellman-group14-sha256 in RFC 4253 and RFC 8268,
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// and Oakley Group 14 in RFC 3526.
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p, _ = new(big.Int).SetString("FFFFFFFFFFFFFFFFC90FDAA22168C234C4C6628B80DC1CD129024E088A67CC74020BBEA63B139B22514A08798E3404DDEF9519B3CD3A431B302B0A6DF25F14374FE1356D6D51C245E485B576625E7EC6F44C42E9A637ED6B0BFF5CB6F406B7EDEE386BFB5A899FA5AE9F24117C4B1FE649286651ECE45B3DC2007CB8A163BF0598DA48361C55D39A69163FA8FD24CF5F83655D23DCA3AD961C62F356208552BB9ED529077096966D670C354E4ABC9804F1746C08CA18217C32905E462E36CE3BE39E772C180E86039B2783A2EC07A28FB5C55DF06F4C52C9DE2BCBF6955817183995497CEA956AE515D2261898FA051015728E5A8AACAA68FFFFFFFFFFFFFFFF", 16)
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p, _ = new(big.Int).SetString(oakleyGroup14, 16)
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group14 := &dhGroup{
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g: new(big.Int).SetInt64(2),
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p: p,
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pMinus1: new(big.Int).Sub(p, bigOne),
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}
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kexAlgoMap[kexAlgoDH14SHA1] = &dhGroup{
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kexAlgoMap[InsecureKeyExchangeDH14SHA1] = &dhGroup{
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g: group14.g, p: group14.p, pMinus1: group14.pMinus1,
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hashFunc: crypto.SHA1,
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}
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kexAlgoMap[kexAlgoDH14SHA256] = &dhGroup{
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kexAlgoMap[KeyExchangeDH14SHA256] = &dhGroup{
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g: group14.g, p: group14.p, pMinus1: group14.pMinus1,
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hashFunc: crypto.SHA256,
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}
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// This is the group called diffie-hellman-group16-sha512 in RFC
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// 8268 and Oakley Group 16 in RFC 3526.
|
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p, _ = new(big.Int).SetString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p, _ = new(big.Int).SetString(oakleyGroup16, 16)
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kexAlgoMap[kexAlgoDH16SHA512] = &dhGroup{
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kexAlgoMap[KeyExchangeDH16SHA512] = &dhGroup{
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g: new(big.Int).SetInt64(2),
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p: p,
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pMinus1: new(big.Int).Sub(p, bigOne),
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hashFunc: crypto.SHA512,
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}
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kexAlgoMap[kexAlgoECDH521] = &ecdh{elliptic.P521()}
|
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kexAlgoMap[kexAlgoECDH384] = &ecdh{elliptic.P384()}
|
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kexAlgoMap[kexAlgoECDH256] = &ecdh{elliptic.P256()}
|
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kexAlgoMap[kexAlgoCurve25519SHA256] = &curve25519sha256{}
|
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kexAlgoMap[kexAlgoCurve25519SHA256LibSSH] = &curve25519sha256{}
|
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kexAlgoMap[kexAlgoDHGEXSHA1] = &dhGEXSHA{hashFunc: crypto.SHA1}
|
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kexAlgoMap[kexAlgoDHGEXSHA256] = &dhGEXSHA{hashFunc: crypto.SHA256}
|
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kexAlgoMap[KeyExchangeCurve25519] = &curve25519sha256{}
|
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kexAlgoMap[keyExchangeCurve25519LibSSH] = &curve25519sha256{}
|
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kexAlgoMap[InsecureKeyExchangeDHGEXSHA1] = &dhGEXSHA{hashFunc: crypto.SHA1}
|
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kexAlgoMap[KeyExchangeDHGEXSHA256] = &dhGEXSHA{hashFunc: crypto.SHA256}
|
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}
|
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|
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// curve25519sha256 implements the curve25519-sha256 (formerly known as
|
||||
@@ -464,15 +470,17 @@ func (kp *curve25519KeyPair) generate(rand io.Reader) error {
|
||||
if _, err := io.ReadFull(rand, kp.priv[:]); err != nil {
|
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return err
|
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}
|
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curve25519.ScalarBaseMult(&kp.pub, &kp.priv)
|
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p, err := curve25519.X25519(kp.priv[:], curve25519.Basepoint)
|
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if err != nil {
|
||||
return fmt.Errorf("curve25519: %w", err)
|
||||
}
|
||||
if len(p) != 32 {
|
||||
return fmt.Errorf("curve25519: internal error: X25519 returned %d bytes, expected 32", len(p))
|
||||
}
|
||||
copy(kp.pub[:], p)
|
||||
return nil
|
||||
}
|
||||
|
||||
// curve25519Zeros is just an array of 32 zero bytes so that we have something
|
||||
// convenient to compare against in order to reject curve25519 points with the
|
||||
// wrong order.
|
||||
var curve25519Zeros [32]byte
|
||||
|
||||
func (kex *curve25519sha256) Client(c packetConn, rand io.Reader, magics *handshakeMagics) (*kexResult, error) {
|
||||
var kp curve25519KeyPair
|
||||
if err := kp.generate(rand); err != nil {
|
||||
@@ -495,11 +503,9 @@ func (kex *curve25519sha256) Client(c packetConn, rand io.Reader, magics *handsh
|
||||
return nil, errors.New("ssh: peer's curve25519 public value has wrong length")
|
||||
}
|
||||
|
||||
var servPub, secret [32]byte
|
||||
copy(servPub[:], reply.EphemeralPubKey)
|
||||
curve25519.ScalarMult(&secret, &kp.priv, &servPub)
|
||||
if subtle.ConstantTimeCompare(secret[:], curve25519Zeros[:]) == 1 {
|
||||
return nil, errors.New("ssh: peer's curve25519 public value has wrong order")
|
||||
secret, err := curve25519.X25519(kp.priv[:], reply.EphemeralPubKey)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("ssh: peer's curve25519 public value is not valid: %w", err)
|
||||
}
|
||||
|
||||
h := crypto.SHA256.New()
|
||||
@@ -541,11 +547,9 @@ func (kex *curve25519sha256) Server(c packetConn, rand io.Reader, magics *handsh
|
||||
return nil, err
|
||||
}
|
||||
|
||||
var clientPub, secret [32]byte
|
||||
copy(clientPub[:], kexInit.ClientPubKey)
|
||||
curve25519.ScalarMult(&secret, &kp.priv, &clientPub)
|
||||
if subtle.ConstantTimeCompare(secret[:], curve25519Zeros[:]) == 1 {
|
||||
return nil, errors.New("ssh: peer's curve25519 public value has wrong order")
|
||||
secret, err := curve25519.X25519(kp.priv[:], kexInit.ClientPubKey)
|
||||
if err != nil {
|
||||
return nil, fmt.Errorf("ssh: peer's curve25519 public value is not valid: %w", err)
|
||||
}
|
||||
|
||||
hostKeyBytes := priv.PublicKey().Marshal()
|
||||
@@ -601,9 +605,9 @@ const (
|
||||
func (gex *dhGEXSHA) Client(c packetConn, randSource io.Reader, magics *handshakeMagics) (*kexResult, error) {
|
||||
// Send GexRequest
|
||||
kexDHGexRequest := kexDHGexRequestMsg{
|
||||
MinBits: dhGroupExchangeMinimumBits,
|
||||
PreferedBits: dhGroupExchangePreferredBits,
|
||||
MaxBits: dhGroupExchangeMaximumBits,
|
||||
MinBits: dhGroupExchangeMinimumBits,
|
||||
PreferredBits: dhGroupExchangePreferredBits,
|
||||
MaxBits: dhGroupExchangeMaximumBits,
|
||||
}
|
||||
if err := c.writePacket(Marshal(&kexDHGexRequest)); err != nil {
|
||||
return nil, err
|
||||
@@ -690,9 +694,7 @@ func (gex *dhGEXSHA) Client(c packetConn, randSource io.Reader, magics *handshak
|
||||
}
|
||||
|
||||
// Server half implementation of the Diffie Hellman Key Exchange with SHA1 and SHA256.
|
||||
//
|
||||
// This is a minimal implementation to satisfy the automated tests.
|
||||
func (gex dhGEXSHA) Server(c packetConn, randSource io.Reader, magics *handshakeMagics, priv AlgorithmSigner, algo string) (result *kexResult, err error) {
|
||||
func (gex *dhGEXSHA) Server(c packetConn, randSource io.Reader, magics *handshakeMagics, priv AlgorithmSigner, algo string) (result *kexResult, err error) {
|
||||
// Receive GexRequest
|
||||
packet, err := c.readPacket()
|
||||
if err != nil {
|
||||
@@ -702,13 +704,32 @@ func (gex dhGEXSHA) Server(c packetConn, randSource io.Reader, magics *handshake
|
||||
if err = Unmarshal(packet, &kexDHGexRequest); err != nil {
|
||||
return
|
||||
}
|
||||
// We check that the request received is valid and that the MaxBits
|
||||
// requested are at least equal to our supported minimum. This is the same
|
||||
// check done in OpenSSH:
|
||||
// https://github.com/openssh/openssh-portable/blob/80a2f64b/kexgexs.c#L94
|
||||
//
|
||||
// Furthermore, we also check that the required MinBits are less than or
|
||||
// equal to 4096 because we can use up to Oakley Group 16.
|
||||
if kexDHGexRequest.MaxBits < kexDHGexRequest.MinBits || kexDHGexRequest.PreferredBits < kexDHGexRequest.MinBits ||
|
||||
kexDHGexRequest.MaxBits < kexDHGexRequest.PreferredBits || kexDHGexRequest.MaxBits < dhGroupExchangeMinimumBits ||
|
||||
kexDHGexRequest.MinBits > 4096 {
|
||||
return nil, fmt.Errorf("ssh: DH GEX request out of range, min: %d, max: %d, preferred: %d", kexDHGexRequest.MinBits,
|
||||
kexDHGexRequest.MaxBits, kexDHGexRequest.PreferredBits)
|
||||
}
|
||||
|
||||
var p *big.Int
|
||||
// We hardcode sending Oakley Group 14 (2048 bits), Oakley Group 15 (3072
|
||||
// bits) or Oakley Group 16 (4096 bits), based on the requested max size.
|
||||
if kexDHGexRequest.MaxBits < 3072 {
|
||||
p, _ = new(big.Int).SetString(oakleyGroup14, 16)
|
||||
} else if kexDHGexRequest.MaxBits < 4096 {
|
||||
p, _ = new(big.Int).SetString(oakleyGroup15, 16)
|
||||
} else {
|
||||
p, _ = new(big.Int).SetString(oakleyGroup16, 16)
|
||||
}
|
||||
|
||||
// Send GexGroup
|
||||
// This is the group called diffie-hellman-group14-sha1 in RFC
|
||||
// 4253 and Oakley Group 14 in RFC 3526.
|
||||
p, _ := new(big.Int).SetString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
|
||||
g := big.NewInt(2)
|
||||
|
||||
msg := &kexDHGexGroupMsg{
|
||||
P: p,
|
||||
G: g,
|
||||
@@ -746,9 +767,9 @@ func (gex dhGEXSHA) Server(c packetConn, randSource io.Reader, magics *handshake
|
||||
h := gex.hashFunc.New()
|
||||
magics.write(h)
|
||||
writeString(h, hostKeyBytes)
|
||||
binary.Write(h, binary.BigEndian, uint32(dhGroupExchangeMinimumBits))
|
||||
binary.Write(h, binary.BigEndian, uint32(dhGroupExchangePreferredBits))
|
||||
binary.Write(h, binary.BigEndian, uint32(dhGroupExchangeMaximumBits))
|
||||
binary.Write(h, binary.BigEndian, kexDHGexRequest.MinBits)
|
||||
binary.Write(h, binary.BigEndian, kexDHGexRequest.PreferredBits)
|
||||
binary.Write(h, binary.BigEndian, kexDHGexRequest.MaxBits)
|
||||
writeInt(h, p)
|
||||
writeInt(h, g)
|
||||
writeInt(h, kexDHGexInit.X)
|
||||
|
||||
Reference in New Issue
Block a user