func extKeyUsageFromOID(oid asn1.ObjectIdentifier) (eku ExtKeyUsage, ok bool) {
for _, pair := range extKeyUsageOIDs {
if oid.Equal(pair.oid) {
return pair.extKeyUsage, true
}
}
return
}
func namedCurveFromOID(oid asn1.ObjectIdentifier) elliptic.Curve {
switch {
case oid.Equal(oidNamedCurveP224):
return elliptic.P224()
case oid.Equal(oidNamedCurveP256):
return elliptic.P256()
case oid.Equal(oidNamedCurveP384):
return elliptic.P384()
case oid.Equal(oidNamedCurveP521):
return elliptic.P521()
}
return nil
}
func getPublicKeyAlgorithmFromOID(oid asn1.ObjectIdentifier) PublicKeyAlgorithm {
switch {
case oid.Equal(oidPublicKeyRSA):
return RSA
case oid.Equal(oidPublicKeyDSA):
return DSA
case oid.Equal(oidPublicKeyECDSA):
return ECDSA
}
return UnknownPublicKeyAlgorithm
}
func getSignatureAlgorithmFromOID(oid asn1.ObjectIdentifier) SignatureAlgorithm {
switch {
case oid.Equal(oidSignatureMD2WithRSA):
return MD2WithRSA
case oid.Equal(oidSignatureMD5WithRSA):
return MD5WithRSA
case oid.Equal(oidSignatureSHA1WithRSA):
return SHA1WithRSA
case oid.Equal(oidSignatureSHA256WithRSA):
return SHA256WithRSA
case oid.Equal(oidSignatureSHA384WithRSA):
return SHA384WithRSA
case oid.Equal(oidSignatureSHA512WithRSA):
return SHA512WithRSA
case oid.Equal(oidSignatureDSAWithSHA1):
return DSAWithSHA1
case oid.Equal(oidSignatureDSAWithSHA256):
return DSAWithSHA256
case oid.Equal(oidSignatureECDSAWithSHA1):
return ECDSAWithSHA1
case oid.Equal(oidSignatureECDSAWithSHA256):
return ECDSAWithSHA256
case oid.Equal(oidSignatureECDSAWithSHA384):
return ECDSAWithSHA384
case oid.Equal(oidSignatureECDSAWithSHA512):
return ECDSAWithSHA512
}
return UnknownSignatureAlgorithm
}