Return to curl_des.c CVS log

Up to [ELWIX - Embedded LightWeight unIX -] / embedaddon / curl / lib

Annotation of embedaddon/curl/lib/curl_des.c, revision 1.1.1.1

1.1       misho       1: /***************************************************************************
                      2:  *                                  _   _ ____  _
                      3:  *  Project                     ___| | | |  _ \| |
                      4:  *                             / __| | | | |_) | |
                      5:  *                            | (__| |_| |  _ <| |___
                      6:  *                             \___|\___/|_| \_\_____|
                      7:  *
                      8:  * Copyright (C) 2015 - 2019, Steve Holme, <steve_holme@hotmail.com>.
                      9:  *
                     10:  * This software is licensed as described in the file COPYING, which
                     11:  * you should have received as part of this distribution. The terms
                     12:  * are also available at https://curl.haxx.se/docs/copyright.html.
                     13:  *
                     14:  * You may opt to use, copy, modify, merge, publish, distribute and/or sell
                     15:  * copies of the Software, and permit persons to whom the Software is
                     16:  * furnished to do so, under the terms of the COPYING file.
                     17:  *
                     18:  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
                     19:  * KIND, either express or implied.
                     20:  *
                     21:  ***************************************************************************/
                     22: 
                     23: #include "curl_setup.h"
                     24: 
                     25: #if defined(USE_NTLM) && !defined(USE_OPENSSL)
                     26: 
                     27: #include "curl_des.h"
                     28: 
                     29: /*
                     30:  * Curl_des_set_odd_parity()
                     31:  *
                     32:  * This is used to apply odd parity to the given byte array. It is typically
                     33:  * used by when a cryptography engines doesn't have it's own version.
                     34:  *
                     35:  * The function is a port of the Java based oddParity() function over at:
                     36:  *
                     37:  * https://davenport.sourceforge.io/ntlm.html
                     38:  *
                     39:  * Parameters:
                     40:  *
                     41:  * bytes       [in/out] - The data whose parity bits are to be adjusted for
                     42:  *                        odd parity.
                     43:  * len         [out]    - The length of the data.
                     44:  */
                     45: void Curl_des_set_odd_parity(unsigned char *bytes, size_t len)
                     46: {
                     47:   size_t i;
                     48: 
                     49:   for(i = 0; i < len; i++) {
                     50:     unsigned char b = bytes[i];
                     51: 
                     52:     bool needs_parity = (((b >> 7) ^ (b >> 6) ^ (b >> 5) ^
                     53:                           (b >> 4) ^ (b >> 3) ^ (b >> 2) ^
                     54:                           (b >> 1)) & 0x01) == 0;
                     55: 
                     56:     if(needs_parity)
                     57:       bytes[i] |= 0x01;
                     58:     else
                     59:       bytes[i] &= 0xfe;
                     60:   }
                     61: }
                     62: 
                     63: #endif /* USE_NTLM && !USE_OPENSSL */