Пример #1
0
        public bool Verify(SignedMessage message)
        {
            var r = new byte[32];
            var s = new byte[32];

            Buffer.BlockCopy(message.SignatureBytes, 1, r, 0, 32);
            Buffer.BlockCopy(message.SignatureBytes, 33, s, 0, 32);
            var recId = message.SignatureBytes[0] - 27;

            var magicData   = VariableLengthEncoding.GetVariableLengthStringBytes("Bitcoin Signed Message:\n");
            var messageData = VariableLengthEncoding.GetVariableLengthStringBytes(message.Message);

            var data = new byte[magicData.Length + messageData.Length];

            Buffer.BlockCopy(magicData, 0, data, 0, magicData.Length);
            Buffer.BlockCopy(messageData, 0, data, magicData.Length, messageData.Length);

            var hash = SHA256.DoubleHash(data);

            var point = signer.RecoverFromSignature(hash, r.ToBigIntegerUnsigned(true), s.ToBigIntegerUnsigned(true), recId);

            var pubKeyHash   = Hash160.Hash(point.EncodePoint(false));
            var addressBytes = new byte[pubKeyHash.Length + 1];

            Buffer.BlockCopy(pubKeyHash, 0, addressBytes, 1, pubKeyHash.Length);

            var address = Base58.EncodeWithCheckSum(addressBytes);

            if (address == message.Address)
            {
                return(true);
            }
            return(false);
        }
Пример #2
0
        public bool Verify(SignedMessage message)
        {
            var r = new byte[32];
            var s = new byte[32];
            Buffer.BlockCopy(message.SignatureBytes, 1, r, 0, 32);
            Buffer.BlockCopy(message.SignatureBytes, 33, s, 0, 32);
            var recId = message.SignatureBytes[0] - 27;

            var magicData = VariableLengthEncoding.GetVariableLengthStringBytes("Bitcoin Signed Message:\n");
            var messageData = VariableLengthEncoding.GetVariableLengthStringBytes(message.Message);

            var data = new byte[magicData.Length + messageData.Length];
            Buffer.BlockCopy(magicData, 0, data, 0, magicData.Length);
            Buffer.BlockCopy(messageData, 0, data, magicData.Length, messageData.Length);

            var hash = SHA256.DoubleHash(data);

            var point = signer.RecoverFromSignature(hash, r.ToBigIntegerUnsigned(true), s.ToBigIntegerUnsigned(true), recId);

            var pubKeyHash = Hash160.Hash(point.EncodePoint(false));
            var addressBytes = new byte[pubKeyHash.Length + 1];
            Buffer.BlockCopy(pubKeyHash, 0, addressBytes, 1, pubKeyHash.Length);

            var address = Base58.EncodeWithCheckSum(addressBytes);

            if (address == message.Address)
            {
                return true;
            }
            return false;
        }
Пример #3
0
        public SignedMessage Sign(BigInteger privateKey, string message)
        {
            var magicData   = VariableLengthEncoding.GetVariableLengthStringBytes("Bitcoin Signed Message:\n");
            var messageData = VariableLengthEncoding.GetVariableLengthStringBytes(message);

            var data = new byte[magicData.Length + messageData.Length];

            Buffer.BlockCopy(magicData, 0, data, 0, magicData.Length);
            Buffer.BlockCopy(messageData, 0, data, magicData.Length, messageData.Length);

            var hash = SHA256.DoubleHash(data);

            var signature = signer.GenerateSignature(privateKey, hash);//, Hex.HexToBigInteger("49ba5e10448bd527da764f0a388bbc1559cc93ea970f8564ac63a0c5e0e7e8bf"));

            var recId = -1;

            var publicKey = Secp256k1.G.Multiply(privateKey);

            for (var i = 0; i < 4; i++)
            {
                var Q = signer.RecoverFromSignature(hash, signature[0], signature[1], i);

                if (Q.X == publicKey.X && Q.Y == publicKey.Y)
                {
                    recId = i;
                    break;
                }
            }
            if (recId == -1)
            {
                throw new Exception("Did not find proper recid");
            }

            var signatureBytes = new byte[65];

            signatureBytes[0] = (byte)(27 + recId);
            var rByteArray = signature[0].ToByteArrayUnsigned(true);
            var sByteArray = signature[1].ToByteArrayUnsigned(true);

            Buffer.BlockCopy(rByteArray, 0, signatureBytes, 1 + (32 - rByteArray.Length), rByteArray.Length);
            Buffer.BlockCopy(sByteArray, 0, signatureBytes, 33 + (32 - sByteArray.Length), sByteArray.Length);

            var signedMessage = new SignedMessage(message, publicKey.GetBitcoinAddress(), signatureBytes);

            return(signedMessage);
        }
Пример #4
0
        public SignedMessage Sign(BigInteger privateKey, string message)
        {
            var magicData = VariableLengthEncoding.GetVariableLengthStringBytes("Bitcoin Signed Message:\n");
            var messageData = VariableLengthEncoding.GetVariableLengthStringBytes(message);

            var data = new byte[magicData.Length + messageData.Length];
            Buffer.BlockCopy(magicData, 0, data, 0, magicData.Length);
            Buffer.BlockCopy(messageData, 0, data, magicData.Length, messageData.Length);

            var hash = SHA256.DoubleHash(data);

            var signature = signer.GenerateSignature(privateKey, hash);//, Hex.HexToBigInteger("49ba5e10448bd527da764f0a388bbc1559cc93ea970f8564ac63a0c5e0e7e8bf"));

            var recId = -1;

            var publicKey = Secp256k1.G.Multiply(privateKey);

            for (var i = 0; i < 4; i++)
            {
                var Q = signer.RecoverFromSignature(hash, signature[0], signature[1], i);

                if (Q.X == publicKey.X && Q.Y == publicKey.Y)
                {
                    recId = i;
                    break;
                }
            }
            if (recId == -1) throw new Exception("Did not find proper recid");

            var signatureBytes = new byte[65];

            signatureBytes[0] = (byte)(27 + recId);
            var rByteArray = signature[0].ToByteArrayUnsigned(true);
            var sByteArray = signature[1].ToByteArrayUnsigned(true);

            Buffer.BlockCopy(rByteArray, 0, signatureBytes, 1 + (32 - rByteArray.Length), rByteArray.Length);
            Buffer.BlockCopy(sByteArray, 0, signatureBytes, 33 + (32 - sByteArray.Length), sByteArray.Length);

            var signedMessage = new SignedMessage(message, publicKey.GetBitcoinAddress(), signatureBytes);

            return signedMessage;
        }