package io.bitsquare.crypto;
import com.google.protobuf.ByteString;
import io.bitsquare.common.UserThread;
import io.bitsquare.common.util.Utilities;
import org.bitcoinj.crypto.KeyCrypterScrypt;
import org.bitcoinj.wallet.Protos;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.spongycastle.crypto.params.KeyParameter;
//TODO: Borrowed form BitcoinJ/Lighthouse. Remove Protos dependency, check complete code logic.
public class ScryptUtil {
private static final Logger log = LoggerFactory.getLogger(ScryptUtil.class);
public interface DeriveKeyResultHandler {
void handleResult(KeyParameter aesKey);
}
public static KeyCrypterScrypt getKeyCrypterScrypt() {
Protos.ScryptParameters scryptParameters = Protos.ScryptParameters.newBuilder()
.setP(6)
.setR(8)
.setN(32768)
.setSalt(ByteString.copyFrom(KeyCrypterScrypt.randomSalt()))
.build();
return new KeyCrypterScrypt(scryptParameters);
}
public static void deriveKeyWithScrypt(KeyCrypterScrypt keyCrypterScrypt, String password, DeriveKeyResultHandler resultHandler) {
Utilities.getThreadPoolExecutor("ScryptUtil:deriveKeyWithScrypt-%d", 1, 2, 5L).submit(() -> {
try {
log.debug("Doing key derivation");
long start = System.currentTimeMillis();
KeyParameter aesKey = keyCrypterScrypt.deriveKey(password);
long duration = System.currentTimeMillis() - start;
log.debug("Key derivation took {} msec", duration);
UserThread.execute(() -> {
try {
resultHandler.handleResult(aesKey);
} catch (Throwable t) {
t.printStackTrace();
log.error("Executing task failed. " + t.getMessage());
}
});
} catch (Throwable t) {
t.printStackTrace();
log.error("Executing task failed. " + t.getMessage());
}
});
}
}