// Test constructor with a normal length key
        HMACT64 hmac = new HMACT64(TEST_KEY);
        assertNotNull(hmac);
    }

    @Test
    void testConstructorWithLongKey() {
        // Test constructor with a key longer than BLOCK_LENGTH (64 bytes)
        // HMACT64 truncates keys at 64 bytes
        HMACT64 hmac = new HMACT64(LONG_TEST_KEY);
        assertNotNull(hmac);
    }

    @Test

            mockedCrypto.when(Crypto::getMD5).thenReturn(mockMd5);
            HMACT64 originalHmac = new HMACT64(TEST_KEY);

            // Mock the clone behavior of the internal MessageDigest
            MessageDigest clonedMd5 = mock(MessageDigest.class);
            when(mockMd5.clone()).thenReturn(clonedMd5);

            HMACT64 clonedHmac = (HMACT64) originalHmac.clone();

            assertNotNull(clonedHmac);

            md4.update(password.getBytes(SmbConstants.UNI_ENCODING));
            HMACT64 hmac = new HMACT64(md4.digest());
            hmac.update(user.toUpperCase().getBytes(SmbConstants.UNI_ENCODING));
            hmac.update(domain.toUpperCase().getBytes(SmbConstants.UNI_ENCODING));
            hmac = new HMACT64(hmac.digest());
            hmac.update(challenge);
            hmac.update(clientChallenge);

                    final MD4 md4 = new MD4();
                    md4.update(responseKeyNT);
                    final byte[] userSessionKey = md4.digest();

                    final HMACT64 hmac = new HMACT64(userSessionKey);
                    hmac.update(sessionNonce);
                    final byte[] ntlm2SessionKey = hmac.digest();

                    if ((getFlags() & NTLMSSP_NEGOTIATE_KEY_EXCH) != 0) {