public static string SignHash(string privateKeyString, byte[] hash)
{
try
{
ECPrivateKeyParameters privateKeyParameters = EosKeyHelper.GetECPrivateKeyParametersFromString(privateKeyString);
ISigner signer = SignerUtilities.GetSigner("NONEwithECDSA");
signer.Init(true, privateKeyParameters);
signer.BlockUpdate(hash, 0, hash.Length);
byte[] sigBytes = signer.GenerateSignature();
var check = new List <byte[]>()
{
sigBytes, KEY_TYPE_BYTES
};
var checksum = Ripemd160Manager.GetHash(SerializationHelper.Combine(check)).Take(CHECKSUM_LENGHT).ToArray();
var signAndChecksum = new List <byte[]>()
{
sigBytes, checksum
};
var finalSig = SIG_PREFIX + Base58.Encode(SerializationHelper.Combine(signAndChecksum));
return(finalSig);
}
catch (Exception exc)
{
Console.WriteLine("Signing Failed: " + exc.ToString());
return(null);
}
}
public static bool VerifySignature(string publicKeyString, string signature, byte[] hash)
{
try
{
byte[] sigBytes = GetSignatureBytesWithoutCheckSum(signature);
var publicKeyParameters = EosKeyHelper.GetECPublicKeyParametersFromString(publicKeyString);
ISigner signer = SignerUtilities.GetSigner("NONEwithECDSA");
signer.Init(false, publicKeyParameters);
signer.BlockUpdate(hash, 0, hash.Length);
return(signer.VerifySignature(sigBytes));
}
catch (Exception exc)
{
Console.WriteLine("Verification failed with the error: " + exc.ToString());
return(false);
}
}