assertNotNull(cryptographer);

        String plainText = "Hello, World!";
        String encrypted = cryptographer.encrypt(plainText);
        assertNotNull(encrypted);
        assertFalse(plainText.equals(encrypted));

        String decrypted = cryptographer.decrypt(encrypted);
        assertEquals(plainText, decrypted);
    }

    public void test_invertibleCryptography_withEmptyString() {

        byte[] encrypted = storage.encryptCredentials(plaintext);
        assertNotNull(encrypted, "Encrypted long password should not be null");
        assertTrue(encrypted.length > plaintext.length, "Encrypted data should be larger due to IV and auth tag");

        char[] decrypted = storage.decryptCredentials(encrypted);
        assertArrayEquals(plaintext, decrypted, "Decrypted long password should match original");

        long sessionId = 0x123456789ABCDEF0L;

        // When - Encrypt
        byte[] encrypted = context.encryptMessage(plaintext, sessionId);

        // Then - Verify encrypted message structure
        assertNotNull(encrypted, "Encrypted message should not be null");
        assertTrue(encrypted.length > plaintext.length, "Encrypted message should be larger than plaintext");

        Set<String> roleSet;
        boolean encrypted;
        String value;

        encrypted = false;
        value = "";
        roleSet = decodedRoleList(roleQueryHelperImpl, value, encrypted);
        assertEquals(0, roleSet.size());

        encrypted = false;
        value = "role1";
        roleSet = decodedRoleList(roleQueryHelperImpl, value, encrypted);
        assertEquals(0, roleSet.size());

    }

    /**
     * Gets the signature or authentication tag for the encrypted message
     *
     * @return the signature/authentication tag
     */
    public byte[] getSignature() {
        return this.signature;
    }

    /**
     * Sets the signature or authentication tag for the encrypted message
     *
     * @param signature
     *            the signature/authentication tag to set

        final int tagLength = getAuthTagLength();
        final byte[] ciphertext = new byte[encrypted.length - tagLength];
        final byte[] authTag = new byte[tagLength];

        // Use constant-time copy operations
        constantTimeCopy(encrypted, 0, ciphertext, 0, ciphertext.length);
        constantTimeCopy(encrypted, ciphertext.length, authTag, 0, tagLength);

        return new EncryptionResult(ciphertext, authTag);

    /**
     * Encrypts the given data.
     *
     * @param data
     *            the data to encrypt
     * @return the encrypted data
     */
    public byte[] encrypto(final byte[] data) {
        final Cipher cipher = pollEncryptoCipher();
        byte[] encrypted;
        try {
            encrypted = cipher.doFinal(data);
        } catch (final IllegalBlockSizeException e) {

        for (String testStr : testStrings) {
            String encrypted = cipher.encrypt(testStr);
            String decrypted = cipher.decrypt(encrypted);
            assertEquals("Failed for: " + testStr, testStr, decrypted);
        }
    }

    // Test provider as CookieResourceProvider interface
    public void test_asInterface() {

        }

        final boolean encrypted = (this.ntlmsspFlags & NtlmFlags.NTLMSSP_NEGOTIATE_KEY_EXCH) != 0;
        if (encrypted) {
            try {
                trunc = this.sealServerHandle.doFinal(trunc);
                if (log.isDebugEnabled()) {
                    log.debug("Decrypted " + Hexdump.toHexString(trunc));
                }

                }

                try {
                    byte[] decrypted = KerberosEncData.decrypt(crypt, serverKey, serverKey.getKeyType());
                    this.encData = new KerberosEncData(decrypted, keysByAlgo);
                } catch (GeneralSecurityException e) {