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[X509] simplify ParsePKIXPublicKey

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This commit is contained in:
徐胖 2022-02-09 09:33:19 +08:00
parent bb11c68327
commit 40159e6542
1 changed files with 4 additions and 28 deletions
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32
smx509/x509.go
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@ -52,35 +52,11 @@ func ParsePKIXPublicKey(derBytes []byte) (interface{}, error) {
} else if len(rest) != 0 {
return nil, errors.New("x509: trailing data after ASN.1 of public-key")
}
if !pki.Algorithm.Algorithm.Equal(oidPublicKeyECDSA) {
return x509.ParsePKIXPublicKey(derBytes)
algo := getPublicKeyAlgorithmFromOID(pki.Algorithm.Algorithm)
if algo == UnknownPublicKeyAlgorithm {
return nil, errors.New("x509: unknown public key algorithm")
}
keyData := &pki
asn1Data := keyData.PublicKey.RightAlign()
paramsData := keyData.Algorithm.Parameters.FullBytes
namedCurveOID := new(asn1.ObjectIdentifier)
rest, err := asn1.Unmarshal(paramsData, namedCurveOID)
if err != nil {
return nil, errors.New("x509: failed to parse ECDSA parameters as named curve")
}
if len(rest) != 0 {
return nil, errors.New("x509: trailing data after ECDSA parameters")
}
if !namedCurveOID.Equal(oidNamedCurveP256SM2) {
return x509.ParsePKIXPublicKey(derBytes)
}
namedCurve := sm2.P256()
x, y := elliptic.Unmarshal(namedCurve, asn1Data)
if x == nil {
return nil, errors.New("x509: failed to unmarshal elliptic curve point")
}
pub := &ecdsa.PublicKey{
Curve: namedCurve,
X: x,
Y: y,
}
return pub, nil
return parsePublicKey(algo, &pki)
}
func marshalPublicKey(pub interface{}) (publicKeyBytes []byte, publicKeyAlgorithm pkix.AlgorithmIdentifier, err error) {