public static bool VerifyAccountSignature(string message, string accountId, string signature)
{
if (string.IsNullOrWhiteSpace(message) || !ValidateAccountId(accountId) || string.IsNullOrWhiteSpace(signature))
{
return(false);
}
var publicKeyBytes = Base58Encoding.DecodeAccountId(accountId);
return(VerifySignature(message, publicKeyBytes, signature));
}
public static bool ValidateAccountId(string AccountId)
{
try
{
if (AccountId[0] != 'L')
{
return(false);
}
Base58Encoding.DecodeAccountId(AccountId);
return(true);
}
catch
{
return(false);
}
}
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);
}
}
public static string GetSignature(string privateKey, string message, string AccountId)
{
var publicKeyBytes = Base58Encoding.DecodeAccountId(AccountId);
var privateKeyBytes = Base58Encoding.DecodePrivateKey(privateKey);
//var signature = Neo.Cryptography.Crypto.Default.Sign(Encoding.UTF8.GetBytes(message), privateKeyBytes, publicKeyBytes);
//return Base58Encoding.Encode(signature);
Neo.Cryptography.ECC.ECDsa sa = new Neo.Cryptography.ECC.ECDsa(privateKeyBytes, Neo.Cryptography.ECC.ECCurve.Secp256r1);
var sigInts = sa.GenerateSignature(Encoding.ASCII.GetBytes(message));
var sh = new SignatureHolder(sigInts);
var signature = sh.ToString();
//var vrt = VerifySignature(message, AccountId, signature);
return(signature);
}
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);
}
}