public static Byte[] ToByteArray(String s, out Byte version) { SHA256 sha256 = SHA256.Create(); Byte[] b = Base58String.ToByteArray(s); Byte[] hash = sha256.ComputeHash(sha256.ComputeHash(b.Take(b.Length - 4).ToArray())); if (!hash.Take(4).SequenceEqual(b.Skip(b.Length - 4).Take(4))) { throw new ArgumentException("Invalid Base58Check String"); } version = b.First(); return(b.Skip(1).Take(b.Length - 5).ToArray()); }
private byte[] parseKey(string key) { SHA256 sha = SHA256.Create(); byte[] decoded = Base58String.ToByteArray(key); if (decoded.Length != 82) throw new Exception("Not enough data"); byte[] checksum = decoded.Skip(78).Take(4).ToArray(); byte[] bytes = decoded.Take(78).ToArray(); byte[] hash = sha.ComputeHash(sha.ComputeHash(bytes)); if (hash[0] != checksum[0] || hash[1] != checksum[1] || hash[2] != checksum[2] || hash[3] != checksum[3]) { throw new Exception("Invalid checksum"); } return bytes; }
public string ExtendedPrivateKeyString(string format) { SHA256 sha = SHA256.Create(); if (format == null || format == "base58") { byte[] hash = sha.ComputeHash(sha.ComputeHash(this.extended_private_key)); byte[] checksum = hash.Take(4).ToArray(); byte[] data = this.extended_private_key.Concat(checksum).ToArray(); return Base58String.FromByteArray(data); } else if (format == "hex") { return HexString.FromByteArray(this.extended_private_key); } else { throw new Exception("bad format"); } }
public BIP32(string sKey, secp256k1Wrap psecp256k1 ) { secp256k1 = psecp256k1; SHA256 sha = SHA256.Create(); byte[] decoded = Base58String.ToByteArray(sKey); if (decoded.Length != 82) throw new Exception("Not enough data"); byte[] checksum = decoded.Skip(78).Take(4).ToArray(); byte[] bytes = decoded.Take(78).ToArray(); byte[] hash = sha.ComputeHash(sha.ComputeHash(bytes)); if (hash[0] != checksum[0] || hash[1] != checksum[1] || hash[2] != checksum[2] || hash[3] != checksum[3]) { throw new Exception("Invalid checksum"); } Initialise(bytes); }
public static string MultiSig2Of3TransactionForTesting(string publickey1, string publickey2, string publickey3, string privKey1, string privKey2, string transactionid, uint prevoutIndex, string toAddress, ulong amount) { TxIn[] txins = new TxIn[1]; TxOut[] txouts = new TxOut[1]; byte version = 0; //PayToAddress HashType hashType = HashType.SIGHASH_ALL; PublicKey pk = new PublicKey(HexString.ToByteArray(toAddress)); //Address add = new Address(pk.); //address to send coins to // string dec = HexString.FromByteArray(Base58CheckString.ToByteArray(add.ToString(), out version)); //create address //create script to pay to address Script sc = ScriptTemplate.PayToAddress(pk.address); //create transaction output TxOut tout = new TxOut(amount - 5, sc.ToBytes()); txouts[0] = tout; object[] addresses = new object[3]; addresses[0] = publickey1; addresses[1] = publickey2; addresses[2] = publickey3; string mscript = MultSigScript(addresses); //create input based on previous output to spend //and the redeem script for the multi-sig address TxIn tin = new TxIn(HexString.ToByteArrayReversed(transactionid), prevoutIndex, HexString.ToByteArray(mscript)); txins[0] = tin; //basically the redeem script Script subScript = new Script(tin.scriptSig); //create the new transaction to spend the coins at the multisig address Transaction tx = new Transaction(1, txins, txouts, 0); //clone the transaction Transaction txCopy = new Transaction(tx.ToBytes()); SHA256 sha256 = SHA256.Create(); //hash the transaction with some leading bytes Byte[] txHash = txCopy.ToBytes().Concat(new Byte[] { (Byte)hashType, 0x00, 0x00, 0x00 }).ToArray(); txHash = sha256.ComputeHash(sha256.ComputeHash(txHash)); //get the private keys bytes 1-33 and base58 byte[] test58 = Base58String.ToByteArray(privKey1).Skip(1).Take(32).ToArray(); ECKeyPair key1 = new ECKeyPair(test58, null, false); PrivateKey pk1 = new PrivateKey(key1); byte[] test582 = Base58String.ToByteArray(privKey2).Skip(1).Take(32).ToArray(); ECKeyPair key2 = new ECKeyPair(test582, null, false); PrivateKey pk2 = new PrivateKey(key2); //Script scriptSig = new Script(tin.scriptSig); //sign the transaction hash Byte[] sig = pk1.Sign(txHash).Concat(new Byte[] { (Byte)hashType }).ToArray(); Byte[] sig2 = pk2.Sign(txHash).Concat(new Byte[] { (Byte)hashType }).ToArray(); //create a new script to sign Script s = new Script(new Byte[] { 0x00 }); //add the signatures to the script s.elements.Add(new ScriptElement(sig)); s.elements.Add(new ScriptElement(sig2)); //txtResult.Text = HexString.FromByteArray(tx.ToBytes()); //add the original multisig script s.elements.Add(new ScriptElement(tin.scriptSig)); //overwrite the script on the transaction with the new signatures + script tin.scriptSig = s.ToBytes(); return(HexString.FromByteArray(tx.ToBytes())); }