public static ECDSA_SIG ECDSASign(ECPrivateKeyInfo keyInfo, byte[] digest)
{
ECDSA_SIG result = default;
CryptoLibHelper.DoECDSASign(keyInfo.EC_OpenSSL_NID, keyInfo.RAW_PrivKey, digest, ref result);
return(result);
}
public static byte[] EncodeSignature(ECDSA_SIG signature)
{
byte[] result;
using (var ms = new MemoryStream())
{
StreamOp.WriteBytes(ms, ref signature.R);
StreamOp.WriteBytes(ms, ref signature.S);
result = StreamOp.SaveStreamToRaw(ms);
}
return(result);
}
public static bool DecodeSignature(byte[] rawSignature, out ECDSA_SIG signature)
{
signature = CT_TECDSA_SIG_Nul;
using (var ms = new MemoryStream())
{
StreamOp.LoadStreamFromRaw(ms, rawSignature);
ms.Position = 0;
if (StreamOp.ReadBytes(ms, ref signature.R) < 0)
{
return(false);
}
if (StreamOp.ReadBytes(ms, ref signature.S) < 0)
{
return(false);
}
if (ms.Position < ms.Length)
{
return(false); // Invalid position
}
}
return(true);
}
public static bool ECDSAVerify(ECDSA_Public pubKey, byte[] digest, ECDSA_SIG signature) => CryptoLibHelper.DoECDSAVerify(pubKey, digest, signature);
