* 
     * @param tc
     * @param password
     * @param challenge
     * @return the calculated response
     * @throws GeneralSecurityException
     */
    static public byte[] getPreNTLMResponse ( CIFSContext tc, String password, byte[] challenge ) throws GeneralSecurityException {
        byte[] p14 = new byte[14];
        byte[] p21 = new byte[21];
        byte[] p24 = new byte[24];