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update vendor keybase/go-crypto (#10234)

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6543 2020-02-11 19:58:23 +01:00 • committed by GitHub
parent 86fdba177a
commit bfd62b6f01
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
29 changed files with 1062 additions and 769 deletions
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34
vendor/github.com/keybase/go-crypto/openpgp/ecdh/ecdh.go generated vendored
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@ -280,3 +280,37 @@ func Unmarshal(curve elliptic.Curve, data []byte) (x, y *big.Int) {
return elliptic.Unmarshal(curve, data)
}
func GenerateKey(curve elliptic.Curve, random io.Reader) (priv *PrivateKey, err error) {
var privBytes []byte
var Vx, Vy *big.Int
if _, ok := curve25519.ToCurve25519(curve); ok {
privBytes = make([]byte, 32)
_, err = io.ReadFull(random, privBytes)
if err != nil {
return nil, err
}
// NOTE: PGP expect scalars in reverse order than Curve 25519
// go library. That's why this trimming is backwards compared
// to curve25519.go
privBytes[31] &= 248
privBytes[0] &= 127
privBytes[0] |= 64
Vx,Vy = curve.ScalarBaseMult(privBytes)
} else {
privBytes, Vx, Vy, err = elliptic.GenerateKey(curve, random)
if err != nil {
return nil, err
}
}
priv = &PrivateKey{}
priv.X = new(big.Int).SetBytes(privBytes)
priv.PublicKey.Curve = curve
priv.PublicKey.X = Vx
priv.PublicKey.Y = Vy
return priv, nil
}