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<a href="xtea_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> * A 32-bit implementation of the XTEA algorithm</span>
<a name="l00003"></a>00003 <span class="comment"> * Copyright (c) 2012 Samuel Pitoiset</span>
<a name="l00004"></a>00004 <span class="comment"> *</span>
<a name="l00005"></a>00005 <span class="comment"> * This file is part of FFmpeg.</span>
<a name="l00006"></a>00006 <span class="comment"> *</span>
<a name="l00007"></a>00007 <span class="comment"> * FFmpeg is free software; you can redistribute it and/or</span>
<a name="l00008"></a>00008 <span class="comment"> * modify it under the terms of the GNU Lesser General Public</span>
<a name="l00009"></a>00009 <span class="comment"> * License as published by the Free Software Foundation; either</span>
<a name="l00010"></a>00010 <span class="comment"> * version 2.1 of the License, or (at your option) any later version.</span>
<a name="l00011"></a>00011 <span class="comment"> *</span>
<a name="l00012"></a>00012 <span class="comment"> * FFmpeg is distributed in the hope that it will be useful,</span>
<a name="l00013"></a>00013 <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00014"></a>00014 <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span>
<a name="l00015"></a>00015 <span class="comment"> * Lesser General Public License for more details.</span>
<a name="l00016"></a>00016 <span class="comment"> *</span>
<a name="l00017"></a>00017 <span class="comment"> * You should have received a copy of the GNU Lesser General Public</span>
<a name="l00018"></a>00018 <span class="comment"> * License along with FFmpeg; if not, write to the Free Software</span>
<a name="l00019"></a>00019 <span class="comment"> * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA</span>
<a name="l00020"></a>00020 <span class="comment"> */</span>
<a name="l00021"></a>00021
<a name="l00022"></a>00022 <span class="preprocessor">#ifndef AVUTIL_XTEA_H</span>
<a name="l00023"></a>00023 <span class="preprocessor"></span><span class="preprocessor">#define AVUTIL_XTEA_H</span>
<a name="l00024"></a>00024 <span class="preprocessor"></span>
<a name="l00025"></a>00025 <span class="preprocessor">#include <stdint.h></span>
<a name="l00026"></a>00026 <span class="comment"></span>
<a name="l00027"></a>00027 <span class="comment">/**</span>
<a name="l00028"></a>00028 <span class="comment"> * @file</span>
<a name="l00029"></a>00029 <span class="comment"> * @brief Public header for libavutil XTEA algorithm</span>
<a name="l00030"></a>00030 <span class="comment"> * @defgroup lavu_xtea XTEA</span>
<a name="l00031"></a>00031 <span class="comment"> * @ingroup lavu_crypto</span>
<a name="l00032"></a>00032 <span class="comment"> * @{</span>
<a name="l00033"></a>00033 <span class="comment"> */</span>
<a name="l00034"></a>00034
<a name="l00035"></a><a class="code" href="structAVXTEA.html">00035</a> <span class="keyword">typedef</span> <span class="keyword">struct </span><a class="code" href="structAVXTEA.html">AVXTEA</a> {
<a name="l00036"></a><a class="code" href="structAVXTEA.html#a18f428a5b5e2f2d0afb754df292d06e3">00036</a> uint32_t <a class="code" href="structAVXTEA.html#a18f428a5b5e2f2d0afb754df292d06e3">key</a>[16];
<a name="l00037"></a>00037 } <a class="code" href="structAVXTEA.html">AVXTEA</a>;
<a name="l00038"></a>00038 <span class="comment"></span>
<a name="l00039"></a>00039 <span class="comment">/**</span>
<a name="l00040"></a>00040 <span class="comment"> * Initialize an AVXTEA context.</span>
<a name="l00041"></a>00041 <span class="comment"> *</span>
<a name="l00042"></a>00042 <span class="comment"> * @param ctx an AVXTEA context</span>
<a name="l00043"></a>00043 <span class="comment"> * @param key a key of 16 bytes used for encryption/decryption</span>
<a name="l00044"></a>00044 <span class="comment"> */</span>
<a name="l00045"></a>00045 <span class="keywordtype">void</span> <a class="code" href="group__lavu__xtea.html#ga015fbc7f1062f11900dcf1c6352f2156" title="Initialize an AVXTEA context.">av_xtea_init</a>(<span class="keyword">struct</span> <a class="code" href="structAVXTEA.html">AVXTEA</a> *ctx, <span class="keyword">const</span> uint8_t key[16]);
<a name="l00046"></a>00046 <span class="comment"></span>
<a name="l00047"></a>00047 <span class="comment">/**</span>
<a name="l00048"></a>00048 <span class="comment"> * Encrypt or decrypt a buffer using a previously initialized context.</span>
<a name="l00049"></a>00049 <span class="comment"> *</span>
<a name="l00050"></a>00050 <span class="comment"> * @param ctx an AVXTEA context</span>
<a name="l00051"></a>00051 <span class="comment"> * @param dst destination array, can be equal to src</span>
<a name="l00052"></a>00052 <span class="comment"> * @param src source array, can be equal to dst</span>
<a name="l00053"></a>00053 <span class="comment"> * @param count number of 8 byte blocks</span>
<a name="l00054"></a>00054 <span class="comment"> * @param iv initialization vector for CBC mode, if NULL then ECB will be used</span>
<a name="l00055"></a>00055 <span class="comment"> * @param decrypt 0 for encryption, 1 for decryption</span>
<a name="l00056"></a>00056 <span class="comment"> */</span>
<a name="l00057"></a>00057 <span class="keywordtype">void</span> <a class="code" href="group__lavu__xtea.html#gaeaf213c9d74ba6d6b3769bda4ce283fc" title="Encrypt or decrypt a buffer using a previously initialized context.">av_xtea_crypt</a>(<span class="keyword">struct</span> <a class="code" href="structAVXTEA.html">AVXTEA</a> *ctx, uint8_t *dst, <span class="keyword">const</span> uint8_t *src,
<a name="l00058"></a>00058 <span class="keywordtype">int</span> count, uint8_t *iv, <span class="keywordtype">int</span> decrypt);
<a name="l00059"></a>00059 <span class="comment"></span>
<a name="l00060"></a>00060 <span class="comment">/**</span>
<a name="l00061"></a>00061 <span class="comment"> * @}</span>
<a name="l00062"></a>00062 <span class="comment"> */</span>
<a name="l00063"></a>00063
<a name="l00064"></a>00064 <span class="preprocessor">#endif </span><span class="comment">/* AVUTIL_XTEA_H */</span>
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