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Implementing public key derivation for both compressed and uncompressed public keys

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This commit is contained in:
Chris Stewart 2017-02-21 15:10:42 -06:00
parent 32109fba4d
commit 486d652814
2 changed files with 5 additions and 5 deletions
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6
src/main/java/org/bitcoin/NativeSecp256k1.java
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@ -153,7 +153,7 @@ public class NativeSecp256k1 {
* @param pubkey ECDSA Public key, 33 or 65 bytes * @param pubkey ECDSA Public key, 33 or 65 bytes
*/ */
//TODO add a 'compressed' arg //TODO add a 'compressed' arg
public static byte[] computePubkey(byte[] seckey) throws AssertFailException{ public static byte[] computePubkey(byte[] seckey, boolean fCompressed) throws AssertFailException{
checkInvariant(seckey.length == 32); checkInvariant(seckey.length == 32);
ByteBuffer byteBuff = nativeECDSABuffer.get(); ByteBuffer byteBuff = nativeECDSABuffer.get();
@ -169,7 +169,7 @@ public class NativeSecp256k1 {
r.lock(); r.lock();
try { try {
retByteArray = secp256k1_ec_pubkey_create(byteBuff, Secp256k1Context.getContext()); retByteArray = secp256k1_ec_pubkey_create(byteBuff, Secp256k1Context.getContext(), fCompressed);
} finally { } finally {
r.unlock(); r.unlock();
} }
@ -440,7 +440,7 @@ public class NativeSecp256k1 {
private static native int secp256k1_ec_seckey_verify(ByteBuffer byteBuff, long context); private static native int secp256k1_ec_seckey_verify(ByteBuffer byteBuff, long context);
private static native byte[][] secp256k1_ec_pubkey_create(ByteBuffer byteBuff, long context); private static native byte[][] secp256k1_ec_pubkey_create(ByteBuffer byteBuff, long context, boolean fCompressed);
private static native byte[][] secp256k1_ec_pubkey_parse(ByteBuffer byteBuff, long context, int inputLen); private static native byte[][] secp256k1_ec_pubkey_parse(ByteBuffer byteBuff, long context, int inputLen);

4
src/test/java/org/bitcoin/NativeSecp256k1Test.java
View file

@ -74,7 +74,7 @@ public class NativeSecp256k1Test {
public void testPubKeyCreatePos() throws AssertFailException{ public void testPubKeyCreatePos() throws AssertFailException{
byte[] sec = BaseEncoding.base16().lowerCase().decode("67E56582298859DDAE725F972992A07C6C4FB9F62A8FFF58CE3CA926A1063530".toLowerCase()); byte[] sec = BaseEncoding.base16().lowerCase().decode("67E56582298859DDAE725F972992A07C6C4FB9F62A8FFF58CE3CA926A1063530".toLowerCase());
byte[] resultArr = NativeSecp256k1.computePubkey( sec); byte[] resultArr = NativeSecp256k1.computePubkey( sec, true);
String pubkeyString = javax.xml.bind.DatatypeConverter.printHexBinary(resultArr); String pubkeyString = javax.xml.bind.DatatypeConverter.printHexBinary(resultArr);
assertEquals( pubkeyString , "02C591A8FF19AC9C4E4E5793673B83123437E975285E7B442F4EE2654DFFCA5E2D" , "testPubKeyCreatePos"); assertEquals( pubkeyString , "02C591A8FF19AC9C4E4E5793673B83123437E975285E7B442F4EE2654DFFCA5E2D" , "testPubKeyCreatePos");
} }
@ -86,7 +86,7 @@ public class NativeSecp256k1Test {
public void testPubKeyCreateNeg() throws AssertFailException{ public void testPubKeyCreateNeg() throws AssertFailException{
byte[] sec = BaseEncoding.base16().lowerCase().decode("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF".toLowerCase()); byte[] sec = BaseEncoding.base16().lowerCase().decode("FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF".toLowerCase());
byte[] resultArr = NativeSecp256k1.computePubkey( sec); byte[] resultArr = NativeSecp256k1.computePubkey( sec, true);
String pubkeyString = javax.xml.bind.DatatypeConverter.printHexBinary(resultArr); String pubkeyString = javax.xml.bind.DatatypeConverter.printHexBinary(resultArr);
assertEquals( pubkeyString, "" , "testPubKeyCreateNeg"); assertEquals( pubkeyString, "" , "testPubKeyCreateNeg");
} }