@Test
 public void testEncryptLongArrayAes258Twofish256UnlimitedStrength() throws Exception {
   testEncrypt(
       TestFileUtil.createRandomArray(1024 * 1024),
       Arrays.asList(
           new CipherSpec[] {
             CipherSpecs.getCipherSpec(CipherSpecs.AES_256_GCM),
             CipherSpecs.getCipherSpec(CipherSpecs.TWOFISH_256_GCM)
           }));
 }
 @Test
 public void testEncryptShortArrayAes128Twofish128() throws Exception {
   testEncrypt(
       new byte[] {1, 2, 3, 4},
       Arrays.asList(
           new CipherSpec[] {
             CipherSpecs.getCipherSpec(CipherSpecs.AES_128_GCM),
             CipherSpecs.getCipherSpec(CipherSpecs.TWOFISH_128_GCM)
           }));
 }
 @Test
 public void testEncryptLongArrayAes128Twofish128() throws Exception {
   testEncrypt(
       TestFileUtil.createRandomArray(1024 * 1024),
       Arrays.asList(
           new CipherSpec[] {
             CipherSpecs.getCipherSpec(CipherSpecs.AES_128_GCM),
             CipherSpecs.getCipherSpec(CipherSpecs.TWOFISH_128_GCM)
           }));
 }
  @Test
  public void testCreateDerivedKeys()
      throws InvalidKeySpecException, NoSuchAlgorithmException, NoSuchProviderException {
    SaltedSecretKey masterKey = createDummyMasterKey();
    CipherSpec cipherSpec = CipherSpecs.getCipherSpec(CipherSpecs.AES_128_GCM);

    byte[] derivedKeySalt1 = new byte[] {1, 2, 3};
    byte[] derivedKeySalt2 = new byte[] {1, 2, 3, 4};

    SaltedSecretKey derivedKey1 =
        CipherUtil.createDerivedKey(masterKey, derivedKeySalt1, cipherSpec);
    SaltedSecretKey derivedKey2 =
        CipherUtil.createDerivedKey(masterKey, derivedKeySalt2, cipherSpec);

    logger.log(Level.INFO, "- Derived key 1: " + StringUtil.toHex(derivedKey1.getEncoded()));
    logger.log(Level.INFO, "      with salt: " + StringUtil.toHex(derivedKey1.getSalt()));
    logger.log(Level.INFO, "- Derived key 2: " + StringUtil.toHex(derivedKey2.getEncoded()));
    logger.log(Level.INFO, "      with salt: " + StringUtil.toHex(derivedKey2.getSalt()));

    assertEquals(128 / 8, derivedKey1.getEncoded().length);
    assertEquals(128 / 8, derivedKey2.getEncoded().length);
    assertFalse(Arrays.equals(derivedKey1.getSalt(), derivedKey2.getSalt()));
    assertFalse(Arrays.equals(derivedKey1.getEncoded(), derivedKey2.getEncoded()));
  }