private string GetDelegator()
{
if (!this.GetDelegated())
{
return("");
}
if (!this.GetSignatureValid())
{
return("");
}
try
{
byte[] signingHash = this.SigningHash(this.Origin);
byte[] delegatorSignature = new byte[65];
Array.Copy(this.Signature, 65, delegatorSignature, 0, 65);
byte[] delegatorpubKey = Secp256k1.RecoverPublickey(signingHash, delegatorSignature);
return(SimpleWallet.PublicKeyToAddress(delegatorpubKey));
}
catch
{
return("");
}
}
public void TestSecp256k1()
{
var priKey = Secp256k1.GeneratePrivateKey();
var pubKey = Secp256k1.DerivePublicKey(priKey);
var msgHash = Keccack256.CalculateHash("hello world");
var signature = Secp256k1.Sign(msgHash, priKey);
var recoveredPubKey = Secp256k1.RecoverPublickey(Keccack256.CalculateHash("hello world"), signature);
Assert.True(pubKey.SequenceEqual(recoveredPubKey));
}
private string GetOrigin()
{
if (!this.GetSignatureValid())
{
return("");
}
try
{
byte[] signingHash = this.SigningHash();
byte[] originSigh = new byte[65];
Array.Copy(this.Signature, 0, originSigh, 0, 65);
byte[] pubKey = Secp256k1.RecoverPublickey(signingHash, originSigh);
return(SimpleWallet.PublicKeyToAddress(pubKey));
}
catch
{
return("");
}
}
/// <summary>
/// verify certificate signture
/// </summary>
/// <param name="certificate"></param>
/// <returns></returns>
public static bool Verify(ICertificate certificate)
{
const bool result = false;
if (certificate.Signer == null || certificate.Signature.Length != 65)
{
throw new ArgumentException("invalid signature");
}
try
{
byte[] msgHash = SigningHash(certificate);
byte[] publicKey = Secp256k1.RecoverPublickey(msgHash, certificate.Signature);
return(certificate.Signer.Equals(SimpleWallet.PublicKeyToAddress(publicKey)));
}
catch
{
}
return(result);
}
