/**
     * Checks if the specified modifier is final.
     *
     * @param modifier
     *            the modifier to check
     * @return true if final, false otherwise
     */
    public static boolean isFinal(final int modifier) {
        return Modifier.isFinal(modifier);
    }

    /**
     * Checks if the specified method is final.
     *
     * @param method
     *            the method to check

    private static final Logger log = LoggerFactory.getLogger(SecureCredentialStorage.class);

    private static final String ENCRYPTION_ALGORITHM = "AES/GCM/NoPadding";
    private static final String KEY_ALGORITHM = "AES";
    private static final String KEY_DERIVATION_ALGORITHM = "PBKDF2WithHmacSHA256";
    private static final int KEY_SIZE = 256;
    private static final int GCM_TAG_SIZE = 128;

     */
    public byte[] encrypto(final byte[] data, final Key key) {
        final Cipher cipher = pollEncryptoCipher(key);
        byte[] encrypted;
        try {
            encrypted = cipher.doFinal(data);
        } catch (final IllegalBlockSizeException e) {
            throw new IllegalBlockSizeRuntimeException(e);
        } catch (final BadPaddingException e) {

            assertTrue(Modifier.isStatic(modifiers), "Field " + field.getName() + " should be static");
            assertTrue(Modifier.isFinal(modifiers), "Field " + field.getName() + " should be final");
        }
    }

    @Test
    @DisplayName("Test constant values are unique")
    void testConstantValuesAreUnique() throws IllegalAccessException {

    private static final Logger log = LoggerFactory.getLogger(Smb2SigningDigest.class);

    /**
     *
     */
    private static final int SIGNATURE_OFFSET = 48;
    private static final int SIGNATURE_LENGTH = 16;
    private final Mac digest;
    private final ReentrantLock signingLock = new ReentrantLock();
    private byte[] signingKey;
    private final String algorithmName;

        assertTrue("ACCESS_CONTROL_ALLOW_HEADERS should be final", Modifier.isFinal(headersField.getModifiers()));

        Field methodsField = CorsHandler.class.getDeclaredField("ACCESS_CONTROL_ALLOW_METHODS");
        assertTrue("ACCESS_CONTROL_ALLOW_METHODS should be final", Modifier.isFinal(methodsField.getModifiers()));

        Field privateNetworkField = CorsHandler.class.getDeclaredField("ACCESS_CONTROL_ALLOW_PRIVATE_NETWORK");

     * @param preauthHash
     *            preauth integrity hash for SMB 3.1.1 (optional)
     */
    public Smb2EncryptionContext(final int cipherId, final DialectVersion dialect, final byte[] encryptionKey, final byte[] decryptionKey,
            final SecureKeyManager keyManager, final byte[] sessionKey, final byte[] preauthHash) {
        this.cipherId = cipherId;
        this.dialect = dialect;
        this.keyManager = keyManager;

    public static <T> T invoke(final Method method, final Object target, final Object... args)
            throws InvocationTargetRuntimeException, IllegalAccessRuntimeException {
        assertArgumentNotNull("method", method);

        try {
            return (T) method.invoke(target, args);
        } catch (final InvocationTargetException ex) {
            final Throwable t = ex.getCause();

        }
    }

    private final NtlmPasswordAuthenticator auth;
    private int ntlmsspFlags;
    private final String workstation;
    private boolean isEstablished = false;
    private byte[] serverChallenge = null;
    private byte[] masterKey = null;
    private final String netbiosName = null;

    private final boolean requireKeyExchange;
    private final AtomicInteger signSequence = new AtomicInteger(0);

     */
    private PacMac() {
        // Utility class
    }

    /**
     *
     */
    private static final String HMAC_KEY = "HMAC";
    private static final byte[] MD5_CONSTANT = "signaturekey\0".getBytes(StandardCharsets.US_ASCII);
    private static final byte[] ZERO_IV = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

    /**
     * Calculates a MAC using the ARCFOUR-HMAC-MD5 algorithm.