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https://github.com/sparrowwallet/drongo.git
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implement bip322 for p2wpkh and p2tr singlesig addresses
This commit is contained in:
Craig Raw
parent
4341973acd
commit
c0555c3fb0
3 changed files with 241 additions and 1 deletions
122
src/main/java/com/sparrowwallet/drongo/crypto/Bip322.java
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122
src/main/java/com/sparrowwallet/drongo/crypto/Bip322.java
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package com.sparrowwallet.drongo.crypto;
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import com.sparrowwallet.drongo.Utils;
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import com.sparrowwallet.drongo.address.Address;
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import com.sparrowwallet.drongo.protocol.*;
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import com.sparrowwallet.drongo.psbt.PSBT;
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import com.sparrowwallet.drongo.psbt.PSBTInput;
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import com.sparrowwallet.drongo.psbt.PSBTInputSigner;
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import com.sparrowwallet.drongo.psbt.PSBTSignatureException;
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import java.nio.charset.StandardCharsets;
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import java.security.SignatureException;
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import java.util.*;
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import static com.sparrowwallet.drongo.protocol.ScriptType.P2TR;
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public class Bip322 {
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public static String signMessageBip322(Address address, String message, PSBTInputSigner psbtInputSigner) {
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Transaction toSpend = getBip322ToSpend(address, message);
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Transaction toSign = getBip322ToSign(toSpend);
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TransactionOutput utxoOutput = toSpend.getOutputs().get(0);
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PSBT psbt = new PSBT(toSign);
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PSBTInput psbtInput = psbt.getPsbtInputs().get(0);
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psbtInput.setWitnessUtxo(utxoOutput);
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psbtInput.setSigHash(SigHash.ALL);
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psbtInput.sign(psbtInputSigner);
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ECKey pubKey = psbtInputSigner.getPubKey();
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TransactionSignature signature = psbtInput.isTaproot() ? psbtInput.getTapKeyPathSignature() : psbtInput.getPartialSignature(pubKey);
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Transaction finalizeTransaction = new Transaction();
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TransactionInput finalizedTxInput = address.getScriptType().addSpendingInput(finalizeTransaction, utxoOutput, pubKey, signature);
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return Base64.getEncoder().encodeToString(finalizedTxInput.getWitness().toByteArray());
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}
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public static void verifyMessageBip322(Address address, String message, String signatureBase64) throws SignatureException {
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byte[] signatureEncoded;
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try {
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signatureEncoded = Base64.getDecoder().decode(signatureBase64);
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} catch(IllegalArgumentException e) {
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throw new SignatureException("Could not decode base64 signature", e);
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}
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TransactionWitness witness = new TransactionWitness(null, signatureEncoded, 0);
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TransactionSignature signature;
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ECKey pubKey;
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if(address.getScriptType() == ScriptType.P2WPKH) {
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signature = witness.getSignatures().get(0);
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pubKey = ECKey.fromPublicOnly(witness.getPushes().get(1));
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if(!address.equals(address.getScriptType().getAddress(pubKey))) {
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throw new SignatureException("Provided address does not match pubkey in signature");
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}
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} else if(address.getScriptType() == ScriptType.P2TR) {
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signature = witness.getSignatures().get(0);
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pubKey = P2TR.getPublicKeyFromScript(address.getOutputScript());
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} else {
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throw new IllegalArgumentException(address.getScriptType() + " addresses are not supported");
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}
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Transaction toSpend = getBip322ToSpend(address, message);
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Transaction toSign = getBip322ToSign(toSpend);
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PSBT psbt = new PSBT(toSign);
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PSBTInput psbtInput = psbt.getPsbtInputs().get(0);
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psbtInput.setWitnessUtxo(toSpend.getOutputs().get(0));
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psbtInput.setSigHash(SigHash.ALL);
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if(address.getScriptType() == ScriptType.P2WPKH) {
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psbtInput.getPartialSignatures().put(pubKey, signature);
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} else if(address.getScriptType() == ScriptType.P2TR) {
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psbtInput.setTapKeyPathSignature(signature);
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}
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try {
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psbt.verifySignatures();
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} catch(PSBTSignatureException e) {
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throw new SignatureException("Signature did not match for message", e);
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}
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}
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public static Transaction getBip322ToSpend(Address address, String message) {
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Transaction toSpend = new Transaction();
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toSpend.setVersion(0);
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toSpend.setLocktime(0);
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List<ScriptChunk> scriptSigChunks = new ArrayList<>();
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scriptSigChunks.add(ScriptChunk.fromOpcode(ScriptOpCodes.OP_0));
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scriptSigChunks.add(ScriptChunk.fromData(getBip322MessageHash(message)));
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Script scriptSig = new Script(scriptSigChunks);
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toSpend.addInput(Sha256Hash.ZERO_HASH, 0xFFFFFFFFL, scriptSig, new TransactionWitness(toSpend, Collections.emptyList()));
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toSpend.getInputs().get(0).setSequenceNumber(0L);
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toSpend.addOutput(0L, address.getOutputScript());
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return toSpend;
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}
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public static Transaction getBip322ToSign(Transaction toSpend) {
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Transaction toSign = new Transaction();
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toSign.setVersion(0);
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toSign.setLocktime(0);
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TransactionWitness witness = new TransactionWitness(toSign);
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toSign.addInput(toSpend.getTxId(), 0L, new Script(new byte[0]), witness);
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toSign.getInputs().get(0).setSequenceNumber(0L);
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toSign.addOutput(0, new Script(List.of(ScriptChunk.fromOpcode(ScriptOpCodes.OP_RETURN))));
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return toSign;
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}
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public static byte[] getBip322MessageHash(String message) {
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if(message == null) {
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throw new IllegalArgumentException("Message cannot be null");
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}
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return Utils.taggedHash("BIP0322-signed-message", message.getBytes(StandardCharsets.UTF_8));
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}
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}
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@ -103,7 +103,7 @@ public class TransactionSignature {
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}
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public static TransactionSignature decodeFromBitcoin(byte[] bytes, boolean requireCanonicalEncoding) throws SignatureDecodeException {
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if(bytes.length == 64) {
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if(bytes.length == 64 || bytes.length == 65) {
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return decodeFromBitcoin(Type.SCHNORR, bytes, requireCanonicalEncoding);
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}
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118
src/test/java/com/sparrowwallet/drongo/crypto/Bip322Test.java
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118
src/test/java/com/sparrowwallet/drongo/crypto/Bip322Test.java
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@ -0,0 +1,118 @@
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package com.sparrowwallet.drongo.crypto;
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import com.sparrowwallet.drongo.Utils;
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import com.sparrowwallet.drongo.address.Address;
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import com.sparrowwallet.drongo.address.InvalidAddressException;
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import com.sparrowwallet.drongo.protocol.ScriptType;
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import com.sparrowwallet.drongo.protocol.Sha256Hash;
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import com.sparrowwallet.drongo.protocol.SigHash;
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import com.sparrowwallet.drongo.protocol.TransactionSignature;
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import com.sparrowwallet.drongo.psbt.PSBTInputSigner;
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import org.junit.Assert;
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import org.junit.Test;
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import java.security.SignatureException;
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public class Bip322Test {
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@Test
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public void getBip322TaggedHash() {
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byte[] empty = Bip322.getBip322MessageHash("");
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Assert.assertArrayEquals(Utils.hexToBytes("c90c269c4f8fcbe6880f72a721ddfbf1914268a794cbb21cfafee13770ae19f1"), empty);
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byte[] hello = Bip322.getBip322MessageHash("Hello World");
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Assert.assertArrayEquals(Utils.hexToBytes("f0eb03b1a75ac6d9847f55c624a99169b5dccba2a31f5b23bea77ba270de0a7a"), hello);
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}
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@Test
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public void signMessageBip322() {
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ECKey privKey = DumpedPrivateKey.fromBase58("L3VFeEujGtevx9w18HD1fhRbCH67Az2dpCymeRE1SoPK6XQtaN2k").getKey();
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Address address = ScriptType.P2WPKH.getAddress(privKey);
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Assert.assertEquals("bc1q9vza2e8x573nczrlzms0wvx3gsqjx7vavgkx0l", address.toString());
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String signature = Bip322.signMessageBip322(address, "", new PSBTInputSigner() {
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@Override
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public TransactionSignature sign(Sha256Hash hash, SigHash sigHash, TransactionSignature.Type signatureType) {
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return privKey.sign(hash, sigHash, signatureType);
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}
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@Override
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public ECKey getPubKey() {
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return ECKey.fromPublicOnly(privKey);
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}
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});
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Assert.assertEquals("AkcwRAIgM2gBAQqvZX15ZiysmKmQpDrG83avLIT492QBzLnQIxYCIBaTpOaD20qRlEylyxFSeEA2ba9YOixpX8z46TSDtS40ASECx/EgAxlkQpQ9hYjgGu6EBCPMVPwVIVJqO4XCsMvViHI=", signature);
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String signature2 = Bip322.signMessageBip322(address, "Hello World", new PSBTInputSigner() {
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@Override
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public TransactionSignature sign(Sha256Hash hash, SigHash sigHash, TransactionSignature.Type signatureType) {
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return privKey.sign(hash, sigHash, signatureType);
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}
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@Override
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public ECKey getPubKey() {
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return ECKey.fromPublicOnly(privKey);
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}
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});
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Assert.assertEquals("AkcwRAIgZRfIY3p7/DoVTty6YZbWS71bc5Vct9p9Fia83eRmw2QCICK/ENGfwLtptFluMGs2KsqoNSk89pO7F29zJLUx9a/sASECx/EgAxlkQpQ9hYjgGu6EBCPMVPwVIVJqO4XCsMvViHI=", signature2);
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}
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@Test(expected = SignatureException.class)
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public void verifyMessageBip322Fail() throws InvalidAddressException, SignatureException {
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Address address = Address.fromString("bc1q9vza2e8x573nczrlzms0wvx3gsqjx7vavgkx0l");
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String message1 = "";
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String signature2 = "AkcwRAIgZRfIY3p7/DoVTty6YZbWS71bc5Vct9p9Fia83eRmw2QCICK/ENGfwLtptFluMGs2KsqoNSk89pO7F29zJLUx9a/sASECx/EgAxlkQpQ9hYjgGu6EBCPMVPwVIVJqO4XCsMvViHI=";
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Bip322.verifyMessageBip322(address, message1, signature2);
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}
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@Test
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public void verifyMessageBip322() throws InvalidAddressException, SignatureException {
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Address address = Address.fromString("bc1q9vza2e8x573nczrlzms0wvx3gsqjx7vavgkx0l");
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String message1 = "";
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String signature1 = "AkcwRAIgM2gBAQqvZX15ZiysmKmQpDrG83avLIT492QBzLnQIxYCIBaTpOaD20qRlEylyxFSeEA2ba9YOixpX8z46TSDtS40ASECx/EgAxlkQpQ9hYjgGu6EBCPMVPwVIVJqO4XCsMvViHI=";
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Bip322.verifyMessageBip322(address, message1, signature1);
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String message2 = "Hello World";
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String signature2 = "AkcwRAIgZRfIY3p7/DoVTty6YZbWS71bc5Vct9p9Fia83eRmw2QCICK/ENGfwLtptFluMGs2KsqoNSk89pO7F29zJLUx9a/sASECx/EgAxlkQpQ9hYjgGu6EBCPMVPwVIVJqO4XCsMvViHI=";
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Bip322.verifyMessageBip322(address, message2, signature2);
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String signature3 = "AkgwRQIhAOzyynlqt93lOKJr+wmmxIens//zPzl9tqIOua93wO6MAiBi5n5EyAcPScOjf1lAqIUIQtr3zKNeavYabHyR8eGhowEhAsfxIAMZZEKUPYWI4BruhAQjzFT8FSFSajuFwrDL1Yhy";
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Bip322.verifyMessageBip322(address, message2, signature3);
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}
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@Test
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public void signMessageBip322Taproot() {
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ECKey privKey = DumpedPrivateKey.fromBase58("L3VFeEujGtevx9w18HD1fhRbCH67Az2dpCymeRE1SoPK6XQtaN2k").getKey();
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Address address = ScriptType.P2TR.getAddress(privKey);
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Assert.assertEquals("bc1ppv609nr0vr25u07u95waq5lucwfm6tde4nydujnu8npg4q75mr5sxq8lt3", address.toString());
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String signature = Bip322.signMessageBip322(address, "Hello World", new PSBTInputSigner() {
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@Override
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public TransactionSignature sign(Sha256Hash hash, SigHash sigHash, TransactionSignature.Type signatureType) {
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return address.getScriptType().getOutputKey(privKey).sign(hash, sigHash, signatureType);
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}
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@Override
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public ECKey getPubKey() {
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return ECKey.fromPublicOnly(privKey);
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}
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});
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Assert.assertEquals("AUHd69PrJQEv+oKTfZ8l+WROBHuy9HKrbFCJu7U1iK2iiEy1vMU5EfMtjc+VSHM7aU0SDbak5IUZRVno2P5mjSafAQ==", signature);
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}
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@Test
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public void verifyMessageBip322Taproot() throws SignatureException {
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ECKey privKey = DumpedPrivateKey.fromBase58("L3VFeEujGtevx9w18HD1fhRbCH67Az2dpCymeRE1SoPK6XQtaN2k").getKey();
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Address address = ScriptType.P2TR.getAddress(privKey);
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Assert.assertEquals("bc1ppv609nr0vr25u07u95waq5lucwfm6tde4nydujnu8npg4q75mr5sxq8lt3", address.toString());
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String message1 = "Hello World";
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String signature1 = "AUHd69PrJQEv+oKTfZ8l+WROBHuy9HKrbFCJu7U1iK2iiEy1vMU5EfMtjc+VSHM7aU0SDbak5IUZRVno2P5mjSafAQ==";
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Bip322.verifyMessageBip322(address, message1, signature1);
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}
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}
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