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reduce parameter

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This commit is contained in:
Emman 2021-12-15 10:33:57 +08:00
parent 0cd7f73183
commit b45441f0ed
1 changed files with 4 additions and 4 deletions
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8
sm2/sm2.go
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@ -606,12 +606,12 @@ func Sign(rand io.Reader, priv *ecdsa.PrivateKey, hash []byte) (r, s *big.Int, e
S: cipher.NewCTR(block, []byte(aesIV)), S: cipher.NewCTR(block, []byte(aesIV)),
} }
// See [NSA] 3.4.1 return signGeneric(priv, &csprng, hash)
c := priv.PublicKey.Curve
return signGeneric(priv, &csprng, c, hash)
} }
func signGeneric(priv *ecdsa.PrivateKey, csprng *cipher.StreamReader, c elliptic.Curve, hash []byte) (r, s *big.Int, err error) { func signGeneric(priv *ecdsa.PrivateKey, csprng *cipher.StreamReader, hash []byte) (r, s *big.Int, err error) {
// See [NSA] 3.4.1
c := priv.PublicKey.Curve
N := c.Params().N N := c.Params().N
if N.Sign() == 0 { if N.Sign() == 0 {
return nil, nil, errZeroParam return nil, nil, errZeroParam