private static bool VerifySignature(string message, byte[] public_key_bytes, string signature)
{
var curve = SecNamedCurves.GetByName("secp256r1");
var domain = new ECDomainParameters(curve.Curve, curve.G, curve.N, curve.H);
//var publicKeyBytes = Base58Encoding.Decode(publicKey);
//var publicKeyBytes = Base58Encoding.DecodeWithCheckSum(publicKey);
//var publicKeyBytes = Base58Encoding.DecodePublicKey(publicKey);
var q = curve.Curve.DecodePoint(public_key_bytes);
var keyParameters = new
Org.BouncyCastle.Crypto.Parameters.ECPublicKeyParameters(q,
domain);
ISigner signer = SignerUtilities.GetSigner("SHA-256withECDSA");
signer.Init(false, keyParameters);
signer.BlockUpdate(Encoding.UTF8.GetBytes(message), 0, message.Length);
var signatureBytes = Base58Encoding.Decode(signature);
var derSign = SignatureHelper.derSign(signatureBytes);
return(signer.VerifySignature(derSign));
}
public SignatureHolder(string signature)
{
var buff = Base58Encoding.Decode(signature);
var b1 = new byte[buff[0]];
var b2 = new byte[buff[1]];
Buffer.BlockCopy(buff, 2, b1, 0, b1.Length);
Buffer.BlockCopy(buff, 2 + b1.Length, b2, 0, b2.Length);
R = new BigInteger(b1);
S = new BigInteger(b2);
}
private static bool VerifySignature(string message, string AccountId, string signature)
{
try
{
var signatureBytes = Base58Encoding.Decode(signature);
var publicKeyBytes = Base58Encoding.DecodeAccountId(AccountId);
var result = Neo.Cryptography.Crypto.Default.VerifySignature(Encoding.UTF8.GetBytes(message), signatureBytes, publicKeyBytes);
return(result);
}
catch (Exception ex)
{
_log?.LogError("VerifySignature failed: " + ex.Message);
return(false);
}
}
private static bool VerifySignature(string message, string AccountId, string signature)
{
try
{
var signatureBytes = Base58Encoding.Decode(signature);
var publicKeyBytes = Base58Encoding.DecodeAccountId(AccountId);
//return Neo.Cryptography.Crypto.Default.VerifySignature(Encoding.UTF8.GetBytes(message), signatureBytes, publicKeyBytes);
Neo.Cryptography.ECC.ECDsa sa = new Neo.Cryptography.ECC.ECDsa(Neo.Cryptography.ECC.ECPoint.FromBytes(publicKeyBytes, Neo.Cryptography.ECC.ECCurve.Secp256r1));
var sh = new SignatureHolder(signature);
return(sa.VerifySignature(Encoding.ASCII.GetBytes(message), sh.R, sh.S));
}
catch (Exception ex)
{
_log.LogError("VerifySignature failed: " + ex.Message);
return(false);
}
}