public static byte[] Sign(byte[] bytes, BigInteger secret)
{
EcdsaSignature sig = CreateEcdsaSignature(bytes, secret);
byte[] der = sig.EncodeToDer();
if (!IsStrictlyCanonical(der))
{
throw new InvalidOperationException("Signature is not strictly canonical.");
}
return(der);
}
public static bool Verify(byte[] data, byte[] sigBytes, BigInteger pub)
{
EcdsaSignature signature = EcdsaSignature.DecodeFromDer(sigBytes);
var signer = new ECDsaSigner();
ECPoint pubPoint = Secp256K1.Curve().DecodePoint(pub.ToByteArray());
var parameters = new ECPublicKeyParameters(pubPoint, Secp256K1.Params());
signer.Init(false, parameters);
try
{
return(signer.VerifySignature(data, signature.R, signature.S));
}
catch (Exception)
{
return(false);
}
}