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<li class="navelem"><a class="el" href="dir_8d855866ba5d436d839c7fc557836cd9.html">libavutil</a></li> </ul>
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<div class="title">des.h</div> </div>
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<a href="des_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"> * DES encryption/decryption</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * Copyright (c) 2007 Reimar Doeffinger</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_DES_H</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor"></span><span class="preprocessor">#define AVUTIL_DES_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> <span class="comment"></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"> * @defgroup lavu_des DES</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment"> * @ingroup lavu_crypto</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment"> * @{</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> </div>
<div class="line"><a name="l00033"></a><span class="lineno"><a class="line" href="structAVDES.html"> 33</a></span> <span class="keyword">typedef</span> <span class="keyword">struct </span><a class="code" href="structAVDES.html">AVDES</a> {</div>
<div class="line"><a name="l00034"></a><span class="lineno"><a class="line" href="structAVDES.html#ae0d51db80fe86440f2fa2dfb56486100"> 34</a></span>  uint64_t <a class="code" href="structAVDES.html#ae0d51db80fe86440f2fa2dfb56486100">round_keys</a>[3][16];</div>
<div class="line"><a name="l00035"></a><span class="lineno"><a class="line" href="structAVDES.html#adb9478aad8ff0ed1adfa4a49ccc1e59c"> 35</a></span>  <span class="keywordtype">int</span> <a class="code" href="structAVDES.html#adb9478aad8ff0ed1adfa4a49ccc1e59c">triple_des</a>;</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> } <a class="code" href="structAVDES.html">AVDES</a>;</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment"></span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment"> * Allocate an AVDES context.</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> <a class="code" href="structAVDES.html">AVDES</a> *<a class="code" href="group__lavu__des.html#gabe865f33a24b647fa5b7852c98387d4c">av_des_alloc</a>(<span class="keywordtype">void</span>);</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment"></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="comment"> * @brief Initializes an AVDES context.</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"> * @param key_bits must be 64 or 192</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment"> * @param decrypt 0 for encryption/CBC-MAC, 1 for decryption</span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment"> * @return zero on success, negative value otherwise</span></div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="keywordtype">int</span> <a class="code" href="group__lavu__des.html#gae8ebc22ff06f4624f4ff9a60b974eb27">av_des_init</a>(<span class="keyword">struct</span> <a class="code" href="structAVDES.html">AVDES</a> *d, <span class="keyword">const</span> uint8_t *key, <span class="keywordtype">int</span> key_bits, <span class="keywordtype">int</span> decrypt);</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment"></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="comment"> * @brief Encrypts / decrypts using the DES algorithm.</span></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"> * @param count number of 8 byte blocks</span></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment"> * @param dst destination array, can be equal to src, must be 8-byte aligned</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"> * @param src source array, can be equal to dst, must be 8-byte aligned, may be NULL</span></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment"> * @param iv initialization vector for CBC mode, if NULL then ECB will be used,</span></div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment"> * must be 8-byte aligned</span></div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment"> * @param decrypt 0 for encryption, 1 for decryption</span></div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="keywordtype">void</span> <a class="code" href="group__lavu__des.html#gaf728cddab7963246ec519c8c123b5412">av_des_crypt</a>(<span class="keyword">struct</span> <a class="code" href="structAVDES.html">AVDES</a> *d, 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);</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="comment">/**</span></div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="comment"> * @brief Calculates CBC-MAC using the DES algorithm.</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"> * @param count number of 8 byte blocks</span></div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="comment"> * @param dst destination array, can be equal to src, must be 8-byte aligned</span></div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="comment"> * @param src source array, can be equal to dst, must be 8-byte aligned, may be NULL</span></div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="keywordtype">void</span> <a class="code" href="group__lavu__des.html#gada639d868e744c18622f4e89b1e5833e">av_des_mac</a>(<span class="keyword">struct</span> <a class="code" href="structAVDES.html">AVDES</a> *d, uint8_t *dst, <span class="keyword">const</span> uint8_t *src, <span class="keywordtype">int</span> count);</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="comment"></span></div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="comment"> * @}</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> </div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="preprocessor">#endif </span><span class="comment">/* AVUTIL_DES_H */</span><span class="preprocessor"></span></div>
<div class="ttc" id="group__lavu__des_html_gaf728cddab7963246ec519c8c123b5412"><div class="ttname"><a href="group__lavu__des.html#gaf728cddab7963246ec519c8c123b5412">av_des_crypt</a></div><div class="ttdeci">void av_des_crypt(struct AVDES *d, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt)</div><div class="ttdoc">Encrypts / decrypts using the DES algorithm. </div></div>
<div class="ttc" id="structAVDES_html_ae0d51db80fe86440f2fa2dfb56486100"><div class="ttname"><a href="structAVDES.html#ae0d51db80fe86440f2fa2dfb56486100">AVDES::round_keys</a></div><div class="ttdeci">uint64_t round_keys[3][16]</div><div class="ttdef"><b>Definition:</b> <a href="des_8h_source.html#l00034">des.h:34</a></div></div>
<div class="ttc" id="group__lavu__des_html_gabe865f33a24b647fa5b7852c98387d4c"><div class="ttname"><a href="group__lavu__des.html#gabe865f33a24b647fa5b7852c98387d4c">av_des_alloc</a></div><div class="ttdeci">AVDES * av_des_alloc(void)</div><div class="ttdoc">Allocate an AVDES context. </div></div>
<div class="ttc" id="group__lavu__des_html_gae8ebc22ff06f4624f4ff9a60b974eb27"><div class="ttname"><a href="group__lavu__des.html#gae8ebc22ff06f4624f4ff9a60b974eb27">av_des_init</a></div><div class="ttdeci">int av_des_init(struct AVDES *d, const uint8_t *key, int key_bits, int decrypt)</div><div class="ttdoc">Initializes an AVDES context. </div></div>
<div class="ttc" id="group__lavu__des_html_gada639d868e744c18622f4e89b1e5833e"><div class="ttname"><a href="group__lavu__des.html#gada639d868e744c18622f4e89b1e5833e">av_des_mac</a></div><div class="ttdeci">void av_des_mac(struct AVDES *d, uint8_t *dst, const uint8_t *src, int count)</div><div class="ttdoc">Calculates CBC-MAC using the DES algorithm. </div></div>
<div class="ttc" id="structAVDES_html_adb9478aad8ff0ed1adfa4a49ccc1e59c"><div class="ttname"><a href="structAVDES.html#adb9478aad8ff0ed1adfa4a49ccc1e59c">AVDES::triple_des</a></div><div class="ttdeci">int triple_des</div><div class="ttdef"><b>Definition:</b> <a href="des_8h_source.html#l00035">des.h:35</a></div></div>
<div class="ttc" id="structAVDES_html"><div class="ttname"><a href="structAVDES.html">AVDES</a></div><div class="ttdef"><b>Definition:</b> <a href="des_8h_source.html#l00033">des.h:33</a></div></div>
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