use of org.spongycastle.crypto.AsymmetricCipherKeyPair in project rskj by rsksmart.
the class CryptoTest method test15.
// ECIES_AES128_SHA256 + Ephemeral Key + IV(all zeroes)
@Test
public void test15() throws Throwable {
byte[] privKey = Hex.decode("a4627abc2a3c25315bff732cb22bc128f203912dd2a840f31e66efb27a47d2b1");
ECKey ecKey = ECKey.fromPrivate(privKey);
ECPrivateKeyParameters ecPrivKey = new ECPrivateKeyParameters(ecKey.getPrivKey(), ECKey.CURVE);
ECPublicKeyParameters ecPubKey = new ECPublicKeyParameters(ecKey.getPubKeyPoint(), ECKey.CURVE);
AsymmetricCipherKeyPair myKey = new AsymmetricCipherKeyPair(ecPubKey, ecPrivKey);
AESFastEngine aesFastEngine = new AESFastEngine();
IESEngine iesEngine = new IESEngine(new ECDHBasicAgreement(), new KDF2BytesGenerator(new SHA256Digest()), new HMac(new SHA256Digest()), new BufferedBlockCipher(new SICBlockCipher(aesFastEngine)));
byte[] d = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8 };
byte[] e = new byte[] { 8, 7, 6, 5, 4, 3, 2, 1 };
IESParameters p = new IESWithCipherParameters(d, e, 64, 128);
ParametersWithIV parametersWithIV = new ParametersWithIV(p, new byte[16]);
ECKeyPairGenerator eGen = new ECKeyPairGenerator();
KeyGenerationParameters gParam = new ECKeyGenerationParameters(ECKey.CURVE, new SecureRandom());
eGen.init(gParam);
ECKeyGenerationParameters keygenParams = new ECKeyGenerationParameters(ECKey.CURVE, new SecureRandom());
ECKeyPairGenerator generator = new ECKeyPairGenerator();
generator.init(keygenParams);
EphemeralKeyPairGenerator kGen = new EphemeralKeyPairGenerator(generator, new KeyEncoder() {
public byte[] getEncoded(AsymmetricKeyParameter keyParameter) {
return ((ECPublicKeyParameters) keyParameter).getQ().getEncoded();
}
});
ECKeyPairGenerator gen = new ECKeyPairGenerator();
gen.init(new ECKeyGenerationParameters(ECKey.CURVE, new SecureRandom()));
iesEngine.init(myKey.getPublic(), parametersWithIV, kGen);
byte[] message = Hex.decode("010101");
log.info("payload: {}", Hex.toHexString(message));
byte[] cipher = iesEngine.processBlock(message, 0, message.length);
log.info("cipher: {}", Hex.toHexString(cipher));
IESEngine decryptorIES_Engine = new IESEngine(new ECDHBasicAgreement(), new KDF2BytesGenerator(new SHA256Digest()), new HMac(new SHA256Digest()), new BufferedBlockCipher(new SICBlockCipher(aesFastEngine)));
decryptorIES_Engine.init(myKey.getPrivate(), parametersWithIV, new ECIESPublicKeyParser(ECKey.CURVE));
byte[] orig = decryptorIES_Engine.processBlock(cipher, 0, cipher.length);
log.info("orig: " + Hex.toHexString(orig));
}
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