public bool IsCertificateSignatureValid()
{
var signer = new EthereumMessageSigner();
var recoveredAddress = signer.EcRecover(ImmunityCertificate.GetHashCertificate(), Signature.ToHex());
return(recoveredAddress.IsTheSameAddress(ImmunityCertificate.SignerAddress));
}
public void ShouldRecover()
{
var signature = "0x0976a177078198a261faf206287b8bb93ebb233347ab09a57c8691733f5772f67f398084b30fc6379ffee2cc72d510fd0f8a7ac2ee0162b95dc5d61146b40ffa1c";
var text = "test";
var hasher = new Sha3Keccack();
var hash = hasher.CalculateHash(text);
var signer = new EthereumMessageSigner();
var account = signer.EcRecover(hash.HexToByteArray(), signature);
Assert.Equal("0x12890d2cce102216644c59dae5baed380d84830c", account.EnsureHexPrefix().ToLower());
signature = signer.Sign(hash.HexToByteArray(),
"0xb5b1870957d373ef0eeffecc6e4812c0fd08f554b37b233526acc331bf1544f7");
account = signer.EcRecover(hash.HexToByteArray(), signature);
Assert.Equal("0x12890d2cce102216644c59dae5baed380d84830c".ToLower(), account.EnsureHexPrefix().ToLower());
}
public EthECDSASignature Sign(string contract, string makerAddress, string makerToken,
string takerToken, string makerAmount, string takerAmount, string expires, string nonce)
{
var plainData = new Object[]
{
contract,
takerToken,
BigInteger.Parse(takerAmount),
makerToken,
BigInteger.Parse(makerAmount),
BigInteger.Parse(expires),
BigInteger.Parse(nonce)
};
var prms = new[] {
new Parameter("address", 1),
new Parameter("address", 1),
new Parameter("uint256", 1),
new Parameter("address", 1),
new Parameter("uint256", 1),
new Parameter("uint256", 1),
new Parameter("uint256", 1)
};
var data = SolidityPack(plainData, prms);
var keystoreCrypto = new KeyStoreCrypto();
//for etherDelta its SHA256, for IDEX just change with SHA3
var hashed = keystoreCrypto.CalculateSha256Hash(data);
var signer = new EthereumMessageSigner();
var newHash = signer.HashPrefixedMessage(hashed);
var signatureRaw = signer.SignAndCalculateV(newHash, _userDataProvider.PrivateKey);
var signature = EthECDSASignature.CreateStringSignature(signatureRaw);
var probe = signer.EcRecover(hashed, signature);
var ethEcdsa = MessageSigner.ExtractEcdsaSignature(signature);
if (probe == makerAddress)
{
return(ethEcdsa);
}
//depending on usage, but it would be better to throw exc here if fails
return(null);
//throw new Exception("Signing failed");
}
public string RecoveryBouncy()
{
EthECKey.SignRecoverable = false;
var signature =
"0x0976a177078198a261faf206287b8bb93ebb233347ab09a57c8691733f5772f67f398084b30fc6379ffee2cc72d510fd0f8a7ac2ee0162b95dc5d61146b40ffa1c";
var text = "test";
var hasher = new Sha3Keccack();
var hash = hasher.CalculateHash(text);
var signer = new EthereumMessageSigner();
var account = signer.EcRecover(hash.HexToByteArray(), signature);
return(account);
}
public RecoverModel EcRecover(Address sender, Signature signature, Hash hash)
{
var ethereumSigner = new EthereumMessageSigner();
var signer = Address.Of(ethereumSigner.EcRecover(hash.GetBytes(), signature));
logger.LogDebug("Hash {0} , Signature {1}, Signer {2}, Sender {3}", hash, signature, signer, sender);
return(new RecoverModel {
Signer = signer,
Hash = hash,
Valid = signer == sender
});
}
public static bool IsSignatureValid(string sentSignature, string sentAddress, string msg)
{
var msgHash = Encoding.UTF8.GetBytes(msg);
var signer = new EthereumMessageSigner();
//var signature = signer.HashAndSign(msg, msg);
var address = signer.EcRecover(msgHash, sentSignature);
if (address.ToLower() == sentAddress.ToLower())
{
return(true);
}
else
{
return(false);
}
}
public void test4()
{
var signature =
"0xdb46c6be4b1ee0ef670625630d38899213ea5d63d749954d82a4651b81f7d44f6d16e2e4903038c022b71d11baa26b08142c6b9f5db106d7b96b57d1836ce10e1b";
var text = "test";
var hasher = new Sha3Keccack();
var hash = hasher.CalculateHash(text);
var signer = new EthereumMessageSigner();
var account = signer.EncodeUTF8AndEcRecover(text, signature);
Assert.Equal("0xe77992311815D6961cBB231CFd2009990203385F".ToLower(), account.EnsureHexPrefix().ToLower());
signature = signer.Sign(hash.HexToByteArray(),
"0xd3a7d42d881a9b59ccefcac0f5bcc69f85e68fdf0bfb6fcbbe42373320de420f");
account = signer.EcRecover(hash.HexToByteArray(), signature);
Assert.Equal("0x12890d2cce102216644c59dae5baed380d84830c".ToLower(), account.EnsureHexPrefix().ToLower());
}
/// <summary>
/// Returns HoardID that signed given message
/// </summary>
/// <param name="message">message</param>
/// <param name="signature">signature string (from Profile.SignMessage)</param>
/// <returns>Signer of the message</returns>
public static HoardID RecoverHoardIdFromMessage(byte[] message, string signature)
{
var msgSigner = new EthereumMessageSigner();
return(new HoardID(msgSigner.EcRecover(message, signature)));
}