Function ParseSm2PrivateKey

x509/pkcs8.go:188–213

(der []byte)

}

func ParseSm2PrivateKey(der []byte) (*sm2.PrivateKey, error) {
	var privKey sm2PrivateKey

	if _, err := asn1.Unmarshal(der, &privKey); err != nil {
		return nil, errors.New("x509: failed to parse SM2 private key: " + err.Error())
	}
	curve := sm2.P256Sm2()
	k := new(big.Int).SetBytes(privKey.PrivateKey)
	curveOrder := curve.Params().N
	if k.Cmp(curveOrder) >= 0 {
		return nil, errors.New("x509: invalid elliptic curve private key value")
	}
	priv := new(sm2.PrivateKey)
	priv.Curve = curve
	priv.D = k
	privateKey := make([]byte, (curveOrder.BitLen()+7)/8)
	for len(privKey.PrivateKey) > len(privateKey) {
		if privKey.PrivateKey[0] != 0 {
			return nil, errors.New("x509: invalid private key length")
		}
		privKey.PrivateKey = privKey.PrivateKey[1:]
	}
	copy(privateKey[len(privateKey)-len(privKey.PrivateKey):], privKey.PrivateKey)
	priv.X, priv.Y = curve.ScalarBaseMult(privateKey)
	return priv, nil
}

func ParsePKCS8UnecryptedPrivateKey(der []byte) (*sm2.PrivateKey, error) {
	var privKey pkcs8