/// <summary>
/// 验证签名
/// </summary>
/// <param name="content"></param>
/// <param name="signHex">签名字符串</param>
/// <param name="publicAddress">公钥（eth地址的表达形式）</param>
/// <param name="getVFunc">对V值进行自定义处理，默认V加上27</param>
/// <returns></returns>
public static bool Verify(byte[] content, string signHex, string publicAddress, Func <byte, byte> getVFunc = null)
{
byte[] md = new byte[32];
md = SHA256Hash(content);
var bs = signHex.HexToByteArray();
var r_bs = new byte[32];
Array.Copy(bs, r_bs, 32);
var s_bs = new byte[32];
Array.Copy(bs, 32, s_bs, 0, 32);
if (getVFunc != null)
{
bs[64] = getVFunc(bs[64]);
}
else
{
bs[64] = (byte)(bs[64] + 27);
}
var signature = new EthECDSASignature(new Org.BouncyCastle.Math.BigInteger(1, r_bs), new Org.BouncyCastle.Math.BigInteger(1, s_bs), new byte[] { bs[64] });
var pubKeyObj = EthECKey.RecoverFromSignature(signature, md);
var addr = pubKeyObj.GetPublicAddress();
var verifyret = pubKeyObj.Verify(md, signature);
return(verifyret && string.Equals(pubKeyObj.GetPublicAddress(), publicAddress, StringComparison.OrdinalIgnoreCase));
}
public bool VerifyAllowingOnlyLowS(byte[] hash, EthECDSASignature sig)
{
if (!sig.IsLowS)
{
return(false);
}
return(_ecKey.Verify(hash, sig.ECDSASignature));
}
public bool Verify(byte[] hash, EthECDSASignature sig)
{
return(_ecKey.Verify(hash, sig.ECDSASignature));
}
public static EthECKey RecoverFromSignature(EthECDSASignature signature, byte[] hash, BigInteger chainId)
{
return(new EthECKey(ECKey.RecoverFromSignature(GetRecIdFromVChain(signature.V, chainId),
signature.ECDSASignature, hash, false)));
}
public static EthECKey RecoverFromSignature(EthECDSASignature signature, int recId, byte[] hash)
{
return(new EthECKey(ECKey.RecoverFromSignature(recId, signature.ECDSASignature, hash, false)));
}
public static EthECKey RecoverFromSignature(EthECDSASignature signature, byte[] hash)
{
return(new EthECKey(ECKey.RecoverFromSignature(GetRecIdFromV(signature.V), signature.ECDSASignature, hash,
false)));
}
