| /*************************************************************************** |
| * _ _ ____ _ |
| * Project ___| | | | _ \| | |
| * / __| | | | |_) | | |
| * | (__| |_| | _ <| |___ |
| * \___|\___/|_| \_\_____| |
| * |
| * Copyright (C) 2015 - 2021, Steve Holme, <[email protected]>. |
| * |
| * This software is licensed as described in the file COPYING, which |
| * you should have received as part of this distribution. The terms |
| * are also available at https://curl.se/docs/copyright.html. |
| * |
| * You may opt to use, copy, modify, merge, publish, distribute and/or sell |
| * copies of the Software, and permit persons to whom the Software is |
| * furnished to do so, under the terms of the COPYING file. |
| * |
| * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY |
| * KIND, either express or implied. |
| * |
| ***************************************************************************/ |
| |
| #include "curl_setup.h" |
| |
| #if defined(USE_NTLM) && !defined(USE_OPENSSL) && !defined(USE_WOLFSSL) |
| |
| #include "curl_des.h" |
| |
| /* |
| * Curl_des_set_odd_parity() |
| * |
| * This is used to apply odd parity to the given byte array. It is typically |
| * used by when a cryptography engines doesn't have it's own version. |
| * |
| * The function is a port of the Java based oddParity() function over at: |
| * |
| * https://davenport.sourceforge.io/ntlm.html |
| * |
| * Parameters: |
| * |
| * bytes [in/out] - The data whose parity bits are to be adjusted for |
| * odd parity. |
| * len [out] - The length of the data. |
| */ |
| void Curl_des_set_odd_parity(unsigned char *bytes, size_t len) |
| { |
| size_t i; |
| |
| for(i = 0; i < len; i++) { |
| unsigned char b = bytes[i]; |
| |
| bool needs_parity = (((b >> 7) ^ (b >> 6) ^ (b >> 5) ^ |
| (b >> 4) ^ (b >> 3) ^ (b >> 2) ^ |
| (b >> 1)) & 0x01) == 0; |
| |
| if(needs_parity) |
| bytes[i] |= 0x01; |
| else |
| bytes[i] &= 0xfe; |
| } |
| } |
| |
| #endif /* USE_NTLM && !USE_OPENSSL */ |
