public static byte[] CreatePrivateKeyScript(Transaction tx, int inputIndex, byte hashType, ECPrivateKeyParameters privateKey, ECPublicKeyParameters publicKey) { //TODO var scriptEngine = new ScriptEngine(); var publicAddress = CreatePublicAddress(publicKey); var publicKeyScript = CreatePublicKeyScript(publicAddress); var txSignature = scriptEngine.TxSignature(publicKeyScript.ToImmutableArray(), tx, inputIndex, hashType); var txSignatureHash = Crypto.DoubleSHA256(txSignature); //Debug.WriteLine("Signing Tx: {0}".Format2(txSignature.ToHexDataString())); //Debug.WriteLine("Signing Tx Hash: {0}".Format2(txSignatureHash.ToHexDataString())); var signer = new ECDsaSigner(); signer.Init(forSigning: true, parameters: privateKey); var signature = signer.GenerateSignature(txSignatureHash); var r = signature[0]; var s = signature[1]; byte[] sigEncoded; using (var stream = new MemoryStream()) { using (var asn1Stream = new Asn1OutputStream(stream)) { asn1Stream.WriteObject(new DerSequence(new DerInteger(r), new DerInteger(s))); } sigEncoded = stream.ToArray().Concat(hashType); } //Debug.WriteLine("Sig R: {0}".Format2(r.ToHexNumberStringUnsigned())); //Debug.WriteLine("Sig S: {0}".Format2(s.ToHexNumberStringUnsigned())); //Debug.WriteLine("Sig Encoded: {0}".Format2(sigEncoded.ToHexDataString())); var privateKeyScript = new ScriptBuilder(); privateKeyScript.WritePushData(sigEncoded); privateKeyScript.WritePushData(publicAddress); //Debug.WriteLine("Private Script: {0}".Format2(privateKeyScript.GetScript().ToHexDataString())); return privateKeyScript.GetScript(); }
private void TestTransactionSignature(byte[][] expectedSignatures, Transaction tx, IDictionary<UInt256, Transaction> txLookup) { var scriptEngine = new ScriptEngine(); for (var inputIndex = 0; inputIndex < tx.Inputs.Length; inputIndex++) { var input = tx.Inputs[inputIndex]; var prevOutput = txLookup[input.PreviousTxOutputKey.TxHash].Outputs[input.PreviousTxOutputKey.TxOutputIndex.ToIntChecked()]; var hashType = GetHashTypeFromScriptSig(input.ScriptSignature); var actual = scriptEngine.TxSignature(prevOutput.ScriptPublicKey, tx, inputIndex, hashType); CollectionAssert.AreEqual(expectedSignatures[inputIndex].ToList(), actual.ToList()); } }