Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/curl/lib/curl_des.c @ 2:b50eed0cc0ef upstream

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ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4. The directory name has changed: no version number in the expanded directory now.
author Franz Glasner <fzglas.hg@dom66.de>
date Mon, 15 Sep 2025 11:43:07 +0200
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1 /***************************************************************************
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2 * _ _ ____ _
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3 * Project ___| | | | _ \| |
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4 * / __| | | | |_) | |
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5 * | (__| |_| | _ <| |___
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6 * \___|\___/|_| \_\_____|
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7 *
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8 * Copyright (C) 2015, Steve Holme, <steve_holme@hotmail.com>.
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9 *
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10 * This software is licensed as described in the file COPYING, which
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11 * you should have received as part of this distribution. The terms
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12 * are also available at https://curl.haxx.se/docs/copyright.html.
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13 *
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14 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
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15 * copies of the Software, and permit persons to whom the Software is
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16 * furnished to do so, under the terms of the COPYING file.
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17 *
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18 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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19 * KIND, either express or implied.
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20 *
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21 ***************************************************************************/
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23 #include "curl_setup.h"
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25 #if defined(USE_NTLM) && !defined(USE_OPENSSL)
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27 #include "curl_des.h"
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29 /*
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30 * Curl_des_set_odd_parity()
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31 *
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32 * This is used to apply odd parity to the given byte array. It is typically
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33 * used by when a cryptography engines doesn't have it's own version.
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34 *
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35 * The function is a port of the Java based oddParity() function over at:
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36 *
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37 * https://davenport.sourceforge.io/ntlm.html
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38 *
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39 * Parameters:
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40 *
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41 * bytes [in/out] - The data whose parity bits are to be adjusted for
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42 * odd parity.
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43 * len [out] - The length of the data.
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44 */
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45 void Curl_des_set_odd_parity(unsigned char *bytes, size_t len)
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46 {
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47 size_t i;
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49 for(i = 0; i < len; i++) {
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50 unsigned char b = bytes[i];
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52 bool needs_parity = (((b >> 7) ^ (b >> 6) ^ (b >> 5) ^
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53 (b >> 4) ^ (b >> 3) ^ (b >> 2) ^
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54 (b >> 1)) & 0x01) == 0;
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56 if(needs_parity)
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57 bytes[i] |= 0x01;
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58 else
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59 bytes[i] &= 0xfe;
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60 }
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61 }
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62
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63 #endif /* USE_NTLM && !USE_OPENSSL */