diff options
Diffstat (limited to 'vendor/golang.org/x/crypto/ssh/kex.go')
| -rw-r--r-- | vendor/golang.org/x/crypto/ssh/kex.go | 24 |
1 files changed, 20 insertions, 4 deletions
diff --git a/vendor/golang.org/x/crypto/ssh/kex.go b/vendor/golang.org/x/crypto/ssh/kex.go index 78aaf0310..5f7fdd851 100644 --- a/vendor/golang.org/x/crypto/ssh/kex.go +++ b/vendor/golang.org/x/crypto/ssh/kex.go @@ -8,12 +8,14 @@ import ( "crypto" "crypto/ecdsa" "crypto/elliptic" + "crypto/fips140" "crypto/rand" "encoding/binary" "errors" "fmt" "io" "math/big" + "slices" "golang.org/x/crypto/curve25519" ) @@ -395,9 +397,27 @@ func ecHash(curve elliptic.Curve) crypto.Hash { return crypto.SHA512 } +// kexAlgoMap defines the supported KEXs. KEXs not included are not supported +// and will not be negotiated, even if explicitly configured. When FIPS mode is +// enabled, only FIPS-approved algorithms are included. var kexAlgoMap = map[string]kexAlgorithm{} func init() { + // mlkem768x25519-sha256 we'll work with fips140=on but not fips140=only + // until Go 1.26. + kexAlgoMap[KeyExchangeMLKEM768X25519] = &mlkem768WithCurve25519sha256{} + kexAlgoMap[KeyExchangeECDHP521] = &ecdh{elliptic.P521()} + kexAlgoMap[KeyExchangeECDHP384] = &ecdh{elliptic.P384()} + kexAlgoMap[KeyExchangeECDHP256] = &ecdh{elliptic.P256()} + + if fips140.Enabled() { + defaultKexAlgos = slices.DeleteFunc(defaultKexAlgos, func(algo string) bool { + _, ok := kexAlgoMap[algo] + return !ok + }) + return + } + p, _ := new(big.Int).SetString(oakleyGroup2, 16) kexAlgoMap[InsecureKeyExchangeDH1SHA1] = &dhGroup{ g: new(big.Int).SetInt64(2), @@ -431,14 +451,10 @@ func init() { hashFunc: crypto.SHA512, } - kexAlgoMap[KeyExchangeECDHP521] = &ecdh{elliptic.P521()} - kexAlgoMap[KeyExchangeECDHP384] = &ecdh{elliptic.P384()} - kexAlgoMap[KeyExchangeECDHP256] = &ecdh{elliptic.P256()} kexAlgoMap[KeyExchangeCurve25519] = &curve25519sha256{} kexAlgoMap[keyExchangeCurve25519LibSSH] = &curve25519sha256{} kexAlgoMap[InsecureKeyExchangeDHGEXSHA1] = &dhGEXSHA{hashFunc: crypto.SHA1} kexAlgoMap[KeyExchangeDHGEXSHA256] = &dhGEXSHA{hashFunc: crypto.SHA256} - kexAlgoMap[KeyExchangeMLKEM768X25519] = &mlkem768WithCurve25519sha256{} } // curve25519sha256 implements the curve25519-sha256 (formerly known as |