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<li class="navelem"><a class="el" href="dir_8d855866ba5d436d839c7fc557836cd9.html">libavutil</a></li> </ul>
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<a href="cast5_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * An implementation of the CAST128 algorithm as mentioned in RFC2144</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * Copyright (c) 2014 Supraja Meedinti</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * This file is part of FFmpeg.</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * FFmpeg is free software; you can redistribute it and/or</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * modify it under the terms of the GNU Lesser General Public</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * License as published by the Free Software Foundation; either</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * version 2.1 of the License, or (at your option) any later version.</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * FFmpeg is distributed in the hope that it will be useful,</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * Lesser General Public License for more details.</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * You should have received a copy of the GNU Lesser General Public</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * License along with FFmpeg; if not, write to the Free Software</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> </div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor">#ifndef AVUTIL_CAST5_H</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor"></span><span class="preprocessor">#define AVUTIL_CAST5_H</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include <stdint.h></span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> </div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"></span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment"> * @file</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment"> * @brief Public header for libavutil CAST5 algorithm</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment"> * @defgroup lavu_cast5 CAST5</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment"> * @ingroup lavu_crypto</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment"> * @{</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> </div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="keyword">extern</span> <span class="keyword">const</span> <span class="keywordtype">int</span> <a class="code" href="group__lavu__cast5.html#ga00f0cc05aeee06257fb27eb6247d8092">av_cast5_size</a>;</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> </div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="keyword">struct </span>AVCAST5;</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment"></span></div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment"> * Allocate an AVCAST5 context</span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment"> * To free the struct: av_free(ptr)</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="keyword">struct </span>AVCAST5 *<a class="code" href="group__lavu__cast5.html#gafacaf78689bf9500adc0e15c9a273f30">av_cast5_alloc</a>(<span class="keywordtype">void</span>);<span class="comment"></span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment"> * Initialize an AVCAST5 context.</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment"> * @param ctx an AVCAST5 context</span></div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment"> * @param key a key of 5,6,...16 bytes used for encryption/decryption</span></div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment"> * @param key_bits number of keybits: possible are 40,48,...,128</span></div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment"> * @return 0 on success, less than 0 on failure</span></div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="keywordtype">int</span> <a class="code" href="group__lavu__cast5.html#ga604b7f58779a1c41c9c6c5a1016ecc72">av_cast5_init</a>(<span class="keyword">struct</span> AVCAST5 *ctx, <span class="keyword">const</span> uint8_t *key, <span class="keywordtype">int</span> key_bits);</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment"></span></div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment"> * Encrypt or decrypt a buffer using a previously initialized context, ECB mode only</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment"> * @param ctx an AVCAST5 context</span></div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment"> * @param dst destination array, can be equal to src</span></div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment"> * @param src source array, can be equal to dst</span></div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="comment"> * @param count number of 8 byte blocks</span></div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment"> * @param decrypt 0 for encryption, 1 for decryption</span></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="keywordtype">void</span> <a class="code" href="group__lavu__cast5.html#ga2097b4a332bd12e51674788a3008a53e">av_cast5_crypt</a>(<span class="keyword">struct</span> AVCAST5 *ctx, uint8_t *dst, <span class="keyword">const</span> uint8_t *src, <span class="keywordtype">int</span> count, <span class="keywordtype">int</span> decrypt);</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="comment"></span></div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="comment"> * Encrypt or decrypt a buffer using a previously initialized context</span></div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="comment"> * @param ctx an AVCAST5 context</span></div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="comment"> * @param dst destination array, can be equal to src</span></div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="comment"> * @param src source array, can be equal to dst</span></div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="comment"> * @param count number of 8 byte blocks</span></div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="comment"> * @param iv initialization vector for CBC mode, NULL for ECB mode</span></div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="comment"> * @param decrypt 0 for encryption, 1 for decryption</span></div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="keywordtype">void</span> <a class="code" href="group__lavu__cast5.html#gad7f20dd3446e711c8fcc8c2e57c2c7d8">av_cast5_crypt2</a>(<span class="keyword">struct</span> AVCAST5 *ctx, uint8_t *dst, <span class="keyword">const</span> uint8_t *src, <span class="keywordtype">int</span> count, uint8_t *iv, <span class="keywordtype">int</span> decrypt);<span class="comment"></span></div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="comment"> * @}</span></div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="preprocessor">#endif </span><span class="comment">/* AVUTIL_CAST5_H */</span><span class="preprocessor"></span></div>
<div class="ttc" id="group__lavu__cast5_html_ga2097b4a332bd12e51674788a3008a53e"><div class="ttname"><a href="group__lavu__cast5.html#ga2097b4a332bd12e51674788a3008a53e">av_cast5_crypt</a></div><div class="ttdeci">void av_cast5_crypt(struct AVCAST5 *ctx, uint8_t *dst, const uint8_t *src, int count, int decrypt)</div><div class="ttdoc">Encrypt or decrypt a buffer using a previously initialized context, ECB mode only. </div></div>
<div class="ttc" id="group__lavu__cast5_html_ga604b7f58779a1c41c9c6c5a1016ecc72"><div class="ttname"><a href="group__lavu__cast5.html#ga604b7f58779a1c41c9c6c5a1016ecc72">av_cast5_init</a></div><div class="ttdeci">int av_cast5_init(struct AVCAST5 *ctx, const uint8_t *key, int key_bits)</div><div class="ttdoc">Initialize an AVCAST5 context. </div></div>
<div class="ttc" id="group__lavu__cast5_html_gad7f20dd3446e711c8fcc8c2e57c2c7d8"><div class="ttname"><a href="group__lavu__cast5.html#gad7f20dd3446e711c8fcc8c2e57c2c7d8">av_cast5_crypt2</a></div><div class="ttdeci">void av_cast5_crypt2(struct AVCAST5 *ctx, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt)</div><div class="ttdoc">Encrypt or decrypt a buffer using a previously initialized context. </div></div>
<div class="ttc" id="group__lavu__cast5_html_gafacaf78689bf9500adc0e15c9a273f30"><div class="ttname"><a href="group__lavu__cast5.html#gafacaf78689bf9500adc0e15c9a273f30">av_cast5_alloc</a></div><div class="ttdeci">struct AVCAST5 * av_cast5_alloc(void)</div><div class="ttdoc">Allocate an AVCAST5 context To free the struct: av_free(ptr) </div></div>
<div class="ttc" id="group__lavu__cast5_html_ga00f0cc05aeee06257fb27eb6247d8092"><div class="ttname"><a href="group__lavu__cast5.html#ga00f0cc05aeee06257fb27eb6247d8092">av_cast5_size</a></div><div class="ttdeci">const int av_cast5_size</div></div>
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