String password15 = "ABCDEFGHIJKLMNO"; // 15 chars, same first 14
        byte[] challenge = hex("0102030405060708");

        // Act
        byte[] r14 = NtlmUtil.getPreNTLMResponse(cifsContext, password14, challenge);
        byte[] r15 = NtlmUtil.getPreNTLMResponse(cifsContext, password15, challenge);

        // Assert: equal because only first 14 OEM bytes are used

        assertEquals(auth1.hashCode(), auth2.hashCode());
    }

    // Test getPreNTLMResponse
    @Test
    void testGetPreNTLMResponse() {
        byte[] challenge = { 1, 2, 3, 4, 5, 6, 7, 8 };
        byte[] response = NtlmPasswordAuthentication.getPreNTLMResponse("password", challenge);
        assertNotNull(response);
        assertEquals(24, response.length);
    }

     * @param challenge the server challenge bytes
     * @return the calculated response
     * @throws GeneralSecurityException if a cryptographic error occurs
     */
    static public byte[] getPreNTLMResponse(final CIFSContext tc, final String password, final byte[] challenge)
            throws GeneralSecurityException {
        final byte[] p14 = new byte[14];
        final byte[] p21 = new byte[21];

     *
     * @param password the password to hash
     * @param challenge the server challenge bytes
     * @return the ANSI DES hash response
     */
    static public byte[] getPreNTLMResponse(final String password, final byte[] challenge) {
        final byte[] p14 = new byte[14];
        final byte[] p21 = new byte[21];
        final byte[] p24 = new byte[24];
        byte[] passwordBytes;

        case 0:
        case 1:
            // NTLMv1 - deprecated and insecure
            log.warn("NTLMv1 LM response is deprecated and insecure. Consider using NTLMv2.");
            return NtlmUtil.getPreNTLMResponse(tc, getPasswordAsCharArray(), chlng);
        case 2:
            // NTLMv1 with NTLM response - still insecure
            log.warn("NTLMv1 NTLM response is deprecated and insecure. Consider using NTLMv2.");

    public static byte[] getLMResponse(final Type2Message type2, final String password) {
        if (type2 == null || password == null) {
            return null;
        }
        return NtlmPasswordAuthentication.getPreNTLMResponse(password, type2.getChallenge());
    }

    /**
     * Calculates the LMv2 response for NTLM authentication.
     *
     * @param type2 the Type-2 message containing the server challenge

            throws GeneralSecurityException {
        if (type2 == null || password == null) {
            return null;
        }
        return NtlmUtil.getPreNTLMResponse(tc, password, type2.getChallenge());
    }

    /**
     * Calculates the LMv2 response for NTLM authentication.
     *
     * @param tc the CIFS context