* @param username the username to authenticate with
     * @param challenge the server challenge bytes
     * @param ansiHash the ANSI password hash
     * @param unicodeHash the Unicode password hash
     */
    public NtlmPasswordAuthentication(final String domain, final String username, final byte[] challenge, final byte[] ansiHash,
            final byte[] unicodeHash) {

            }
            NtlmPasswordAuthentication ntlm;
            if (msg.startsWith("NTLM ")) {
                final byte[] challenge = SmbSession.getChallenge(dc);
                ntlm = NtlmSsp.authenticate(request, response, challenge);
                if (ntlm == null) {
                    return;
                }
            } else {

        }
        return new NtlmChallenge(trans.server.encryptionKey, dc);
    }

    /**
     * Retrieves an NTLM challenge from a domain controller for the configured domain.
     *
     * @return the NTLM challenge from the domain controller
     * @throws SmbException if an SMB error occurs
     * @throws UnknownHostException if the domain controller cannot be resolved
     */

        NtlmContext context = new NtlmContext(mockAuth, true);

        // State 1: Generate Type 1 message
        context.initSecContext(new byte[0], 0, 0);

        // Create a mock Type 2 message (server challenge)
        byte[] serverChallenge = new byte[] { 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08 };
        int type2Flags = NtlmFlags.NTLMSSP_NEGOTIATE_NTLM | NtlmFlags.NTLMSSP_REQUEST_TARGET | NtlmFlags.NTLMSSP_NEGOTIATE_KEY_EXCH

            assertEquals(expectedFlags, message.getFlags(), "Default flags should be set correctly");
            assertNull(message.getChallenge(), "Challenge should initially be null");
            assertNull(message.getTarget(), "Target should initially be null");
            assertNull(message.getTargetInformation(), "Target information should be null when no target is set");
        }

        // Since we can't mock the internal transport operations easily without real network,
        // we'll test the simpler case where no NTLM negotiation is needed
        when(request.getHeader("Authorization")).thenReturn(null);

        filter.doFilter(request, response, filterChain);

        // Should challenge the client

    }

    /**
     * This constructor used to instance a SigningDigest object for
     * signing/verifying SMB using kerberos session key.
     * The MAC Key = concat(Session Key, Digest of Challenge);
     * Because of Kerberos Authentication don't have challenge,
     * The MAC Key = Session Key
     *
     * @param macSigningKey
     *            The MAC key used to sign or verify SMB.
     */

     * @return true if the context is established, false otherwise
     */
    public boolean isEstablished() {
        return isEstablished;
    }

    /**
     * Gets the server's NTLM challenge bytes.
     * @return the server challenge bytes
     */
    public byte[] getServerChallenge() {
        return serverChallenge;
    }

    /**
     * Gets the signing key for message authentication.

     *
     * @param tc the CIFS context
     * @param type2 the Type-2 message containing the server challenge
     * @param domain the domain name
     * @param user the username
     * @param password the user's password
     * @param clientChallenge the client challenge bytes
     * @return the calculated response
     * @throws GeneralSecurityException if a cryptographic error occurs
     */

    }

    @Override
    public boolean isEstablished() {
        return this.isEstablished;
    }

    /**
     * Gets the server's NTLM challenge bytes.
     * @return the server's challenge
     */
    public byte[] getServerChallenge() {
        return this.serverChallenge;
    }

    @Override
    public byte[] getSigningKey() {
        return this.masterKey;