Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame] | 1 | /*************************************************************************** |
| 2 | * _ _ ____ _ |
| 3 | * Project ___| | | | _ \| | |
| 4 | * / __| | | | |_) | | |
| 5 | * | (__| |_| | _ <| |___ |
| 6 | * \___|\___/|_| \_\_____| |
| 7 | * |
| 8 | * Copyright (C) 2015, 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 |
Alex Deymo | 8f1a214 | 2016-06-28 14:49:26 -0700 | [diff] [blame] | 12 | * are also available at https://curl.haxx.se/docs/copyright.html. |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame] | 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 | |
Alex Deymo | 8f1a214 | 2016-06-28 14:49:26 -0700 | [diff] [blame] | 25 | #if defined(USE_NTLM) && !defined(USE_OPENSSL) |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame] | 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 | * |
Elliott Hughes | 82be86d | 2017-09-20 17:00:17 -0700 | [diff] [blame] | 37 | * https://davenport.sourceforge.io/ntlm.html |
Bertrand SIMONNET | e6cd738 | 2015-07-01 15:39:44 -0700 | [diff] [blame] | 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 | |
Alex Deymo | 8f1a214 | 2016-06-28 14:49:26 -0700 | [diff] [blame] | 63 | #endif /* USE_NTLM && !USE_OPENSSL */ |