<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=9"/>
<meta name="generator" content="Doxygen 1.8.5"/>
<title>PolarSSL v1.3.8: ctr_drbg.c Source File</title>
<link href="tabs.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="dynsections.js"></script>
<link href="doxygen.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
<div id="titlearea">
<table cellspacing="0" cellpadding="0">
<tbody>
<tr style="height: 56px;">
<td style="padding-left: 0.5em;">
<div id="projectname">PolarSSL v1.3.8
</div>
</td>
</tr>
</tbody>
</table>
</div>
<!-- end header part -->
<!-- Generated by Doxygen 1.8.5 -->
<div id="navrow1" class="tabs">
<ul class="tablist">
<li><a href="index.html"><span>Main Page</span></a></li>
<li><a href="modules.html"><span>Modules</span></a></li>
<li><a href="annotated.html"><span>Data Structures</span></a></li>
<li class="current"><a href="files.html"><span>Files</span></a></li>
</ul>
</div>
<div id="navrow2" class="tabs2">
<ul class="tablist">
<li><a href="files.html"><span>File List</span></a></li>
<li><a href="globals.html"><span>Globals</span></a></li>
</ul>
</div>
<div id="nav-path" class="navpath">
<ul>
<li class="navelem"><a class="el" href="dir_4478130ea462cc4195c75f9e6ba20061.html">library</a></li> </ul>
</div>
</div><!-- top -->
<div class="header">
<div class="headertitle">
<div class="title">ctr_drbg.c</div> </div>
</div><!--header-->
<div class="contents">
<a href="ctr__drbg_8c.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"> * CTR_DRBG implementation based on AES-256 (NIST SP 800-90)</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * Copyright (C) 2006-2014, Brainspark B.V.</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * This file is part of PolarSSL (http://www.polarssl.org)</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * Lead Maintainer: Paul Bakker <polarssl_maintainer at polarssl.org></span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * All rights reserved.</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * This program is free software; you can redistribute it and/or modify</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * it under the terms of the GNU General Public License as published by</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * the Free Software Foundation; either version 2 of the License, or</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * (at your option) any later version.</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * This program is distributed in the hope that it will be useful,</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> * GNU General Public License for more details.</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> <span class="comment"> * You should have received a copy of the GNU General Public License along</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"> * with this program; if not, write to the Free Software Foundation, Inc.,</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> * The NIST SP 800-90 DRBGs are described in the following publucation.</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"> * http://csrc.nist.gov/publications/nistpubs/800-90/SP800-90revised_March2007.pdf</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> </div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#if !defined(POLARSSL_CONFIG_FILE)</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor"></span><span class="preprocessor">#include "<a class="code" href="config_8h.html">polarssl/config.h</a>"</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor"></span><span class="preprocessor">#include POLARSSL_CONFIG_FILE</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor"></span><span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="preprocessor">#if defined(POLARSSL_CTR_DRBG_C)</span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="preprocessor">#include "<a class="code" href="ctr__drbg_8h.html">polarssl/ctr_drbg.h</a>"</span></div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> </div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="preprocessor">#if defined(POLARSSL_FS_IO)</span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="preprocessor"></span><span class="preprocessor">#include <stdio.h></span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="preprocessor">#if defined(POLARSSL_PLATFORM_C)</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="preprocessor"></span><span class="preprocessor">#include "<a class="code" href="platform_8h.html">polarssl/platform.h</a>"</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="preprocessor"></span><span class="preprocessor">#define polarssl_printf printf</span></div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="preprocessor"></span><span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment">/* Implementation that should never be optimized out by the compiler */</span></div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="keyword">static</span> <span class="keywordtype">void</span> polarssl_zeroize( <span class="keywordtype">void</span> *v, <span class="keywordtype">size_t</span> n ) {</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keyword">volatile</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *p = v; <span class="keywordflow">while</span>( n-- ) *p++ = 0;</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> }</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> </div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"> * Non-public function wrapped by ctr_crbg_init(). Necessary to allow NIST</span></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment"> * tests to succeed (which require known length fixed entropy)</span></div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="keywordtype">int</span> <a class="code" href="ctr__drbg_8h.html#a15775822b651b6201d796fab79ce7fd5">ctr_drbg_init_entropy_len</a>(</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <a class="code" href="structctr__drbg__context.html">ctr_drbg_context</a> *ctx,</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="keywordtype">int</span> (*f_entropy)(<span class="keywordtype">void</span> *, <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *, <span class="keywordtype">size_t</span>),</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keywordtype">void</span> *p_entropy,</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *custom,</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <span class="keywordtype">size_t</span> len,</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keywordtype">size_t</span> entropy_len )</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> {</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="keywordtype">int</span> ret;</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> key[<a class="code" href="ctr__drbg_8h.html#a7e724588e94f73bd3fb7623e3f191913">CTR_DRBG_KEYSIZE</a>];</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> </div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  memset( ctx, 0, <span class="keyword">sizeof</span>(<a class="code" href="structctr__drbg__context.html">ctr_drbg_context</a>) );</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  memset( key, 0, <a class="code" href="ctr__drbg_8h.html#a7e724588e94f73bd3fb7623e3f191913">CTR_DRBG_KEYSIZE</a> );</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> </div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <a class="code" href="aes_8h.html#afd6a37a98051a30f74418beb908d0ecd">aes_init</a>( &ctx-><a class="code" href="structctr__drbg__context.html#a73bb2a2ded8df0ac180fb308ac628671">aes_ctx</a> );</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> </div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  ctx-><a class="code" href="structctr__drbg__context.html#afa8f09f491d90d9a6d9cfc61e521d457">f_entropy</a> = f_entropy;</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  ctx-><a class="code" href="structctr__drbg__context.html#ab4a8f86eedb85daf0ffcbe8b5aae86a4">p_entropy</a> = p_entropy;</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> </div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  ctx-><a class="code" href="structctr__drbg__context.html#a65a0be04e3bdad14d9b89244afde1d98">entropy_len</a> = entropy_len;</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  ctx-><a class="code" href="structctr__drbg__context.html#af6a62a0ef862fe4abcd7c580736e5c23">reseed_interval</a> = <a class="code" href="ctr__drbg_8h.html#aada2905e3923ac30ff08869396fa715a">CTR_DRBG_RESEED_INTERVAL</a>;</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> </div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="comment"> * Initialize with an empty key</span></div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <a class="code" href="aes_8h.html#a10f4e5fcaa4c08daf9c7a165a59c7969">aes_setkey_enc</a>( &ctx-><a class="code" href="structctr__drbg__context.html#a73bb2a2ded8df0ac180fb308ac628671">aes_ctx</a>, key, <a class="code" href="ctr__drbg_8h.html#ad7fddfff369d259329ff0f7c64063da0">CTR_DRBG_KEYBITS</a> );</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> </div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keywordflow">if</span>( ( ret = <a class="code" href="ctr__drbg_8h.html#af958b326a8a3f7c168867d999a9b6b55">ctr_drbg_reseed</a>( ctx, custom, len ) ) != 0 )</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keywordflow">return</span>( ret );</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> </div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="keywordflow">return</span>( 0 );</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> }</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> </div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="keywordtype">int</span> <a class="code" href="ctr__drbg_8h.html#a0e27d989ba78d2a5a40166d68a1b7bdb">ctr_drbg_init</a>( <a class="code" href="structctr__drbg__context.html">ctr_drbg_context</a> *ctx,</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keywordtype">int</span> (*f_entropy)(<span class="keywordtype">void</span> *, <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *, <span class="keywordtype">size_t</span>),</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keywordtype">void</span> *p_entropy,</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *custom,</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="keywordtype">size_t</span> len )</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> {</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keywordflow">return</span>( <a class="code" href="ctr__drbg_8h.html#a15775822b651b6201d796fab79ce7fd5">ctr_drbg_init_entropy_len</a>( ctx, f_entropy, p_entropy, custom, len,</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <a class="code" href="ctr__drbg_8h.html#aad464fda72b082db273843523b6de363">CTR_DRBG_ENTROPY_LEN</a> ) );</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span> }</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> </div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="keywordtype">void</span> <a class="code" href="ctr__drbg_8h.html#af58c0660e33c9f98a934e01e1e9a9d0b">ctr_drbg_free</a>( <a class="code" href="structctr__drbg__context.html">ctr_drbg_context</a> *ctx )</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span> {</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="keywordflow">if</span>( ctx == NULL )</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span> </div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <a class="code" href="aes_8h.html#a9ae37ee8cfabac5da5df9a573c34850f">aes_free</a>( &ctx-><a class="code" href="structctr__drbg__context.html#a73bb2a2ded8df0ac180fb308ac628671">aes_ctx</a> );</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  polarssl_zeroize( ctx, <span class="keyword">sizeof</span>( <a class="code" href="structctr__drbg__context.html">ctr_drbg_context</a> ) );</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span> }</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span> </div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span> <span class="keywordtype">void</span> <a class="code" href="ctr__drbg_8h.html#a0a4b47f2f9c153ca84ff3f27193dcfec">ctr_drbg_set_prediction_resistance</a>( <a class="code" href="structctr__drbg__context.html">ctr_drbg_context</a> *ctx, <span class="keywordtype">int</span> resistance )</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span> {</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  ctx-><a class="code" href="structctr__drbg__context.html#a73bfaff58a084d6903e2bfdf09255216">prediction_resistance</a> = resistance;</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> }</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span> </div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span> <span class="keywordtype">void</span> <a class="code" href="ctr__drbg_8h.html#a48c1d04815d90f4d191e848209483ffd">ctr_drbg_set_entropy_len</a>( <a class="code" href="structctr__drbg__context.html">ctr_drbg_context</a> *ctx, <span class="keywordtype">size_t</span> len )</div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span> {</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  ctx-><a class="code" href="structctr__drbg__context.html#a65a0be04e3bdad14d9b89244afde1d98">entropy_len</a> = len;</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span> }</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span> </div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span> <span class="keywordtype">void</span> <a class="code" href="ctr__drbg_8h.html#a2ce2d084b5c2a25d7dafb912c73b24a6">ctr_drbg_set_reseed_interval</a>( <a class="code" href="structctr__drbg__context.html">ctr_drbg_context</a> *ctx, <span class="keywordtype">int</span> interval )</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span> {</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  ctx-><a class="code" href="structctr__drbg__context.html#af6a62a0ef862fe4abcd7c580736e5c23">reseed_interval</a> = interval;</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span> }</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span> </div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span> <span class="keyword">static</span> <span class="keywordtype">int</span> block_cipher_df( <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *output,</div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *data, <span class="keywordtype">size_t</span> data_len )</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span> {</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> buf[<a class="code" href="ctr__drbg_8h.html#aeeb6d3716faa516c3b90d6587de119dc">CTR_DRBG_MAX_SEED_INPUT</a> + <a class="code" href="ctr__drbg_8h.html#a907251d56e7adb3d795bfe04e1f36865">CTR_DRBG_BLOCKSIZE</a> + 16];</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> tmp[<a class="code" href="ctr__drbg_8h.html#ab2109628bba8f8548bf5f0d18bf18cd8">CTR_DRBG_SEEDLEN</a>];</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> key[<a class="code" href="ctr__drbg_8h.html#a7e724588e94f73bd3fb7623e3f191913">CTR_DRBG_KEYSIZE</a>];</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> chain[<a class="code" href="ctr__drbg_8h.html#a907251d56e7adb3d795bfe04e1f36865">CTR_DRBG_BLOCKSIZE</a>];</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *p, *iv;</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <a class="code" href="structaes__context.html">aes_context</a> aes_ctx;</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span> </div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="keywordtype">int</span> i, j;</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  <span class="keywordtype">size_t</span> buf_len, use_len;</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span> </div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  memset( buf, 0, <a class="code" href="ctr__drbg_8h.html#aeeb6d3716faa516c3b90d6587de119dc">CTR_DRBG_MAX_SEED_INPUT</a> + <a class="code" href="ctr__drbg_8h.html#a907251d56e7adb3d795bfe04e1f36865">CTR_DRBG_BLOCKSIZE</a> + 16 );</div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <a class="code" href="aes_8h.html#afd6a37a98051a30f74418beb908d0ecd">aes_init</a>( &aes_ctx );</div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span> </div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span> <span class="comment"> * Construct IV (16 bytes) and S in buffer</span></div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span> <span class="comment"> * IV = Counter (in 32-bits) padded to 16 with zeroes</span></div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span> <span class="comment"> * S = Length input string (in 32-bits) || Length of output (in 32-bits) ||</span></div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span> <span class="comment"> * data || 0x80</span></div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span> <span class="comment"> * (Total is padded to a multiple of 16-bytes with zeroes)</span></div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  p = buf + <a class="code" href="ctr__drbg_8h.html#a907251d56e7adb3d795bfe04e1f36865">CTR_DRBG_BLOCKSIZE</a>;</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  *p++ = ( data_len >> 24 ) & 0xff;</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  *p++ = ( data_len >> 16 ) & 0xff;</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  *p++ = ( data_len >> 8 ) & 0xff;</div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  *p++ = ( data_len ) & 0xff;</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  p += 3;</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  *p++ = <a class="code" href="ctr__drbg_8h.html#ab2109628bba8f8548bf5f0d18bf18cd8">CTR_DRBG_SEEDLEN</a>;</div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  memcpy( p, data, data_len );</div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  p[data_len] = 0x80;</div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span> </div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  buf_len = CTR_DRBG_BLOCKSIZE + 8 + data_len + 1;</div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span> </div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <span class="keywordflow">for</span>( i = 0; i < <a class="code" href="ctr__drbg_8h.html#a7e724588e94f73bd3fb7623e3f191913">CTR_DRBG_KEYSIZE</a>; i++ )</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  key[i] = i;</div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span> </div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  <a class="code" href="aes_8h.html#a10f4e5fcaa4c08daf9c7a165a59c7969">aes_setkey_enc</a>( &aes_ctx, key, <a class="code" href="ctr__drbg_8h.html#ad7fddfff369d259329ff0f7c64063da0">CTR_DRBG_KEYBITS</a> );</div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span> </div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span> <span class="comment"> * Reduce data to POLARSSL_CTR_DRBG_SEEDLEN bytes of data</span></div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  <span class="keywordflow">for</span>( j = 0; j < <a class="code" href="ctr__drbg_8h.html#ab2109628bba8f8548bf5f0d18bf18cd8">CTR_DRBG_SEEDLEN</a>; j += <a class="code" href="ctr__drbg_8h.html#a907251d56e7adb3d795bfe04e1f36865">CTR_DRBG_BLOCKSIZE</a> )</div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  {</div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  p = buf;</div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  memset( chain, 0, CTR_DRBG_BLOCKSIZE );</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  use_len = buf_len;</div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span> </div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  <span class="keywordflow">while</span>( use_len > 0 )</div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  {</div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  <span class="keywordflow">for</span>( i = 0; i < <a class="code" href="ctr__drbg_8h.html#a907251d56e7adb3d795bfe04e1f36865">CTR_DRBG_BLOCKSIZE</a>; i++ )</div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  chain[i] ^= p[i];</div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  p += <a class="code" href="ctr__drbg_8h.html#a907251d56e7adb3d795bfe04e1f36865">CTR_DRBG_BLOCKSIZE</a>;</div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  use_len -= ( use_len >= <a class="code" href="ctr__drbg_8h.html#a907251d56e7adb3d795bfe04e1f36865">CTR_DRBG_BLOCKSIZE</a> ) ?</div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  CTR_DRBG_BLOCKSIZE : use_len;</div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span> </div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <a class="code" href="aes_8h.html#a0c80313f1e98a573f0876366c35f0445">aes_crypt_ecb</a>( &aes_ctx, <a class="code" href="aes_8h.html#a91e721bca5c6db6402fc3a4781d69b10">AES_ENCRYPT</a>, chain, chain );</div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  }</div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span> </div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  memcpy( tmp + j, chain, CTR_DRBG_BLOCKSIZE );</div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span> </div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span> <span class="comment"> * Update IV</span></div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  buf[3]++;</div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  }</div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span> </div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span> <span class="comment"> * Do final encryption with reduced data</span></div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <a class="code" href="aes_8h.html#a10f4e5fcaa4c08daf9c7a165a59c7969">aes_setkey_enc</a>( &aes_ctx, tmp, <a class="code" href="ctr__drbg_8h.html#ad7fddfff369d259329ff0f7c64063da0">CTR_DRBG_KEYBITS</a> );</div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  iv = tmp + <a class="code" href="ctr__drbg_8h.html#a7e724588e94f73bd3fb7623e3f191913">CTR_DRBG_KEYSIZE</a>;</div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  p = output;</div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span> </div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  <span class="keywordflow">for</span>( j = 0; j < <a class="code" href="ctr__drbg_8h.html#ab2109628bba8f8548bf5f0d18bf18cd8">CTR_DRBG_SEEDLEN</a>; j += <a class="code" href="ctr__drbg_8h.html#a907251d56e7adb3d795bfe04e1f36865">CTR_DRBG_BLOCKSIZE</a> )</div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  {</div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  <a class="code" href="aes_8h.html#a0c80313f1e98a573f0876366c35f0445">aes_crypt_ecb</a>( &aes_ctx, <a class="code" href="aes_8h.html#a91e721bca5c6db6402fc3a4781d69b10">AES_ENCRYPT</a>, iv, iv );</div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  memcpy( p, iv, CTR_DRBG_BLOCKSIZE );</div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  p += <a class="code" href="ctr__drbg_8h.html#a907251d56e7adb3d795bfe04e1f36865">CTR_DRBG_BLOCKSIZE</a>;</div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  }</div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span> </div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  <a class="code" href="aes_8h.html#a9ae37ee8cfabac5da5df9a573c34850f">aes_free</a>( &aes_ctx );</div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span> </div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <span class="keywordflow">return</span>( 0 );</div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span> }</div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span> </div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span> <span class="keyword">static</span> <span class="keywordtype">int</span> ctr_drbg_update_internal( <a class="code" href="structctr__drbg__context.html">ctr_drbg_context</a> *ctx,</div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> data[CTR_DRBG_SEEDLEN] )</div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span> {</div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> tmp[<a class="code" href="ctr__drbg_8h.html#ab2109628bba8f8548bf5f0d18bf18cd8">CTR_DRBG_SEEDLEN</a>];</div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *p = tmp;</div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  <span class="keywordtype">int</span> i, j;</div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span> </div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  memset( tmp, 0, CTR_DRBG_SEEDLEN );</div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span> </div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  <span class="keywordflow">for</span>( j = 0; j < <a class="code" href="ctr__drbg_8h.html#ab2109628bba8f8548bf5f0d18bf18cd8">CTR_DRBG_SEEDLEN</a>; j += <a class="code" href="ctr__drbg_8h.html#a907251d56e7adb3d795bfe04e1f36865">CTR_DRBG_BLOCKSIZE</a> )</div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  {</div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span> <span class="comment"> * Increase counter</span></div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  <span class="keywordflow">for</span>( i = CTR_DRBG_BLOCKSIZE; i > 0; i-- )</div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  <span class="keywordflow">if</span>( ++ctx-><a class="code" href="structctr__drbg__context.html#ab7a56989db1a28061fcf59330fd5ebab">counter</a>[i - 1] != 0 )</div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span> </div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span> <span class="comment"> * Crypt counter block</span></div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  <a class="code" href="aes_8h.html#a0c80313f1e98a573f0876366c35f0445">aes_crypt_ecb</a>( &ctx-><a class="code" href="structctr__drbg__context.html#a73bb2a2ded8df0ac180fb308ac628671">aes_ctx</a>, <a class="code" href="aes_8h.html#a91e721bca5c6db6402fc3a4781d69b10">AES_ENCRYPT</a>, ctx-><a class="code" href="structctr__drbg__context.html#ab7a56989db1a28061fcf59330fd5ebab">counter</a>, p );</div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span> </div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  p += <a class="code" href="ctr__drbg_8h.html#a907251d56e7adb3d795bfe04e1f36865">CTR_DRBG_BLOCKSIZE</a>;</div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  }</div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span> </div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  <span class="keywordflow">for</span>( i = 0; i < <a class="code" href="ctr__drbg_8h.html#ab2109628bba8f8548bf5f0d18bf18cd8">CTR_DRBG_SEEDLEN</a>; i++ )</div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  tmp[i] ^= data[i];</div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span> </div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span> <span class="comment"> * Update key and counter</span></div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  <a class="code" href="aes_8h.html#a10f4e5fcaa4c08daf9c7a165a59c7969">aes_setkey_enc</a>( &ctx-><a class="code" href="structctr__drbg__context.html#a73bb2a2ded8df0ac180fb308ac628671">aes_ctx</a>, tmp, <a class="code" href="ctr__drbg_8h.html#ad7fddfff369d259329ff0f7c64063da0">CTR_DRBG_KEYBITS</a> );</div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  memcpy( ctx-><a class="code" href="structctr__drbg__context.html#ab7a56989db1a28061fcf59330fd5ebab">counter</a>, tmp + CTR_DRBG_KEYSIZE, CTR_DRBG_BLOCKSIZE );</div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span> </div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  <span class="keywordflow">return</span>( 0 );</div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span> }</div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span> </div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span> <span class="keywordtype">void</span> <a class="code" href="ctr__drbg_8h.html#a62b4daaff672263de0827dbe150f21fe">ctr_drbg_update</a>( <a class="code" href="structctr__drbg__context.html">ctr_drbg_context</a> *ctx,</div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *additional, <span class="keywordtype">size_t</span> add_len )</div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span> {</div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> add_input[<a class="code" href="ctr__drbg_8h.html#ab2109628bba8f8548bf5f0d18bf18cd8">CTR_DRBG_SEEDLEN</a>];</div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span> </div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  <span class="keywordflow">if</span>( add_len > 0 )</div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  {</div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  block_cipher_df( add_input, additional, add_len );</div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  ctr_drbg_update_internal( ctx, add_input );</div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  }</div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span> }</div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span> </div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span> <span class="keywordtype">int</span> <a class="code" href="ctr__drbg_8h.html#af958b326a8a3f7c168867d999a9b6b55">ctr_drbg_reseed</a>( <a class="code" href="structctr__drbg__context.html">ctr_drbg_context</a> *ctx,</div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *additional, <span class="keywordtype">size_t</span> len )</div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span> {</div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> seed[<a class="code" href="ctr__drbg_8h.html#aeeb6d3716faa516c3b90d6587de119dc">CTR_DRBG_MAX_SEED_INPUT</a>];</div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  <span class="keywordtype">size_t</span> seedlen = 0;</div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span> </div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  <span class="keywordflow">if</span>( ctx-><a class="code" href="structctr__drbg__context.html#a65a0be04e3bdad14d9b89244afde1d98">entropy_len</a> + len > <a class="code" href="ctr__drbg_8h.html#aeeb6d3716faa516c3b90d6587de119dc">CTR_DRBG_MAX_SEED_INPUT</a> )</div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  <span class="keywordflow">return</span>( <a class="code" href="ctr__drbg_8h.html#ad2ebdb67b7c42e990590e1b5d6cbadf4">POLARSSL_ERR_CTR_DRBG_INPUT_TOO_BIG</a> );</div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span> </div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  memset( seed, 0, <a class="code" href="ctr__drbg_8h.html#aeeb6d3716faa516c3b90d6587de119dc">CTR_DRBG_MAX_SEED_INPUT</a> );</div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span> </div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span> <span class="comment"> * Gather entropy_len bytes of entropy to seed state</span></div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  <span class="keywordflow">if</span>( 0 != ctx-><a class="code" href="structctr__drbg__context.html#afa8f09f491d90d9a6d9cfc61e521d457">f_entropy</a>( ctx-><a class="code" href="structctr__drbg__context.html#ab4a8f86eedb85daf0ffcbe8b5aae86a4">p_entropy</a>, seed,</div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  ctx-><a class="code" href="structctr__drbg__context.html#a65a0be04e3bdad14d9b89244afde1d98">entropy_len</a> ) )</div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  {</div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  <span class="keywordflow">return</span>( <a class="code" href="ctr__drbg_8h.html#a29337787324ee83801279c2bb3debfb3">POLARSSL_ERR_CTR_DRBG_ENTROPY_SOURCE_FAILED</a> );</div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  }</div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span> </div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  seedlen += ctx-><a class="code" href="structctr__drbg__context.html#a65a0be04e3bdad14d9b89244afde1d98">entropy_len</a>;</div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span> </div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span> <span class="comment"> * Add additional data</span></div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  <span class="keywordflow">if</span>( additional && len )</div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  {</div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  memcpy( seed + seedlen, additional, len );</div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  seedlen += len;</div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  }</div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span> </div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span> <span class="comment"> * Reduce to 384 bits</span></div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  block_cipher_df( seed, seed, seedlen );</div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span> </div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span> <span class="comment"> * Update state</span></div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  ctr_drbg_update_internal( ctx, seed );</div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  ctx-><a class="code" href="structctr__drbg__context.html#aec37b4eec92c064eb61e404d6d506419">reseed_counter</a> = 1;</div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span> </div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  <span class="keywordflow">return</span>( 0 );</div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span> }</div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span> </div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span> <span class="keywordtype">int</span> <a class="code" href="ctr__drbg_8h.html#a7484335f1f0e7460c06e0e949e6a5a95">ctr_drbg_random_with_add</a>( <span class="keywordtype">void</span> *p_rng,</div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *output, <span class="keywordtype">size_t</span> output_len,</div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *additional, <span class="keywordtype">size_t</span> add_len )</div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span> {</div>
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  <span class="keywordtype">int</span> ret = 0;</div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  <a class="code" href="structctr__drbg__context.html">ctr_drbg_context</a> *ctx = (<a class="code" href="structctr__drbg__context.html">ctr_drbg_context</a> *) p_rng;</div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> add_input[<a class="code" href="ctr__drbg_8h.html#ab2109628bba8f8548bf5f0d18bf18cd8">CTR_DRBG_SEEDLEN</a>];</div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *p = output;</div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> tmp[<a class="code" href="ctr__drbg_8h.html#a907251d56e7adb3d795bfe04e1f36865">CTR_DRBG_BLOCKSIZE</a>];</div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  <span class="keywordtype">int</span> i;</div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  <span class="keywordtype">size_t</span> use_len;</div>
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span> </div>
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  <span class="keywordflow">if</span>( output_len > <a class="code" href="ctr__drbg_8h.html#a97273e0c80ab6111bf79f05834f174bf">CTR_DRBG_MAX_REQUEST</a> )</div>
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  <span class="keywordflow">return</span>( <a class="code" href="ctr__drbg_8h.html#a4ec9724247956f9b2004beb3998cbf4b">POLARSSL_ERR_CTR_DRBG_REQUEST_TOO_BIG</a> );</div>
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span> </div>
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  <span class="keywordflow">if</span>( add_len > <a class="code" href="ctr__drbg_8h.html#aa422ee06cd5836113c0068996fa9560c">CTR_DRBG_MAX_INPUT</a> )</div>
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  <span class="keywordflow">return</span>( <a class="code" href="ctr__drbg_8h.html#ad2ebdb67b7c42e990590e1b5d6cbadf4">POLARSSL_ERR_CTR_DRBG_INPUT_TOO_BIG</a> );</div>
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span> </div>
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  memset( add_input, 0, CTR_DRBG_SEEDLEN );</div>
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span> </div>
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  <span class="keywordflow">if</span>( ctx-><a class="code" href="structctr__drbg__context.html#aec37b4eec92c064eb61e404d6d506419">reseed_counter</a> > ctx-><a class="code" href="structctr__drbg__context.html#af6a62a0ef862fe4abcd7c580736e5c23">reseed_interval</a> ||</div>
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  ctx-><a class="code" href="structctr__drbg__context.html#a73bfaff58a084d6903e2bfdf09255216">prediction_resistance</a> )</div>
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  {</div>
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  <span class="keywordflow">if</span>( ( ret = <a class="code" href="ctr__drbg_8h.html#af958b326a8a3f7c168867d999a9b6b55">ctr_drbg_reseed</a>( ctx, additional, add_len ) ) != 0 )</div>
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  <span class="keywordflow">return</span>( ret );</div>
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span> </div>
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  add_len = 0;</div>
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  }</div>
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span> </div>
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  <span class="keywordflow">if</span>( add_len > 0 )</div>
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  {</div>
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  block_cipher_df( add_input, additional, add_len );</div>
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  ctr_drbg_update_internal( ctx, add_input );</div>
<div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  }</div>
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span> </div>
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  <span class="keywordflow">while</span>( output_len > 0 )</div>
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  {</div>
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00347"></a><span class="lineno"> 347</span> <span class="comment"> * Increase counter</span></div>
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  <span class="keywordflow">for</span>( i = CTR_DRBG_BLOCKSIZE; i > 0; i-- )</div>
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span>  <span class="keywordflow">if</span>( ++ctx-><a class="code" href="structctr__drbg__context.html#ab7a56989db1a28061fcf59330fd5ebab">counter</a>[i - 1] != 0 )</div>
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span> </div>
<div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00354"></a><span class="lineno"> 354</span> <span class="comment"> * Crypt counter block</span></div>
<div class="line"><a name="l00355"></a><span class="lineno"> 355</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  <a class="code" href="aes_8h.html#a0c80313f1e98a573f0876366c35f0445">aes_crypt_ecb</a>( &ctx-><a class="code" href="structctr__drbg__context.html#a73bb2a2ded8df0ac180fb308ac628671">aes_ctx</a>, <a class="code" href="aes_8h.html#a91e721bca5c6db6402fc3a4781d69b10">AES_ENCRYPT</a>, ctx-><a class="code" href="structctr__drbg__context.html#ab7a56989db1a28061fcf59330fd5ebab">counter</a>, tmp );</div>
<div class="line"><a name="l00357"></a><span class="lineno"> 357</span> </div>
<div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  use_len = ( output_len > <a class="code" href="ctr__drbg_8h.html#a907251d56e7adb3d795bfe04e1f36865">CTR_DRBG_BLOCKSIZE</a> ) ? CTR_DRBG_BLOCKSIZE :</div>
<div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  output_len;</div>
<div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00361"></a><span class="lineno"> 361</span> <span class="comment"> * Copy random block to destination</span></div>
<div class="line"><a name="l00362"></a><span class="lineno"> 362</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  memcpy( p, tmp, use_len );</div>
<div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  p += use_len;</div>
<div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  output_len -= use_len;</div>
<div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  }</div>
<div class="line"><a name="l00367"></a><span class="lineno"> 367</span> </div>
<div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  ctr_drbg_update_internal( ctx, add_input );</div>
<div class="line"><a name="l00369"></a><span class="lineno"> 369</span> </div>
<div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  ctx-><a class="code" href="structctr__drbg__context.html#aec37b4eec92c064eb61e404d6d506419">reseed_counter</a>++;</div>
<div class="line"><a name="l00371"></a><span class="lineno"> 371</span> </div>
<div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  <span class="keywordflow">return</span>( 0 );</div>
<div class="line"><a name="l00373"></a><span class="lineno"> 373</span> }</div>
<div class="line"><a name="l00374"></a><span class="lineno"> 374</span> </div>
<div class="line"><a name="l00375"></a><span class="lineno"> 375</span> <span class="keywordtype">int</span> <a class="code" href="ctr__drbg_8h.html#a2625d0bebed2f8e1d9f4257e4ed3a02c">ctr_drbg_random</a>( <span class="keywordtype">void</span> *p_rng, <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *output, <span class="keywordtype">size_t</span> output_len )</div>
<div class="line"><a name="l00376"></a><span class="lineno"> 376</span> {</div>
<div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  <span class="keywordflow">return</span> <a class="code" href="ctr__drbg_8h.html#a7484335f1f0e7460c06e0e949e6a5a95">ctr_drbg_random_with_add</a>( p_rng, output, output_len, NULL, 0 );</div>
<div class="line"><a name="l00378"></a><span class="lineno"> 378</span> }</div>
<div class="line"><a name="l00379"></a><span class="lineno"> 379</span> </div>
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span> <span class="preprocessor">#if defined(POLARSSL_FS_IO)</span></div>
<div class="line"><a name="l00381"></a><span class="lineno"> 381</span> <span class="preprocessor"></span><span class="keywordtype">int</span> <a class="code" href="ctr__drbg_8h.html#a1fbf41eb924ef6d0cabfdf586696ccd0">ctr_drbg_write_seed_file</a>( <a class="code" href="structctr__drbg__context.html">ctr_drbg_context</a> *ctx, <span class="keyword">const</span> <span class="keywordtype">char</span> *path )</div>
<div class="line"><a name="l00382"></a><span class="lineno"> 382</span> {</div>
<div class="line"><a name="l00383"></a><span class="lineno"> 383</span>  <span class="keywordtype">int</span> ret = <a class="code" href="ctr__drbg_8h.html#ac24b26db879708ddef6840f37a1c94aa">POLARSSL_ERR_CTR_DRBG_FILE_IO_ERROR</a>;</div>
<div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  FILE *f;</div>
<div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> buf[ <a class="code" href="ctr__drbg_8h.html#aa422ee06cd5836113c0068996fa9560c">CTR_DRBG_MAX_INPUT</a> ];</div>
<div class="line"><a name="l00386"></a><span class="lineno"> 386</span> </div>
<div class="line"><a name="l00387"></a><span class="lineno"> 387</span>  <span class="keywordflow">if</span>( ( f = fopen( path, <span class="stringliteral">"wb"</span> ) ) == NULL )</div>
<div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  <span class="keywordflow">return</span>( <a class="code" href="ctr__drbg_8h.html#ac24b26db879708ddef6840f37a1c94aa">POLARSSL_ERR_CTR_DRBG_FILE_IO_ERROR</a> );</div>
<div class="line"><a name="l00389"></a><span class="lineno"> 389</span> </div>
<div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  <span class="keywordflow">if</span>( ( ret = <a class="code" href="ctr__drbg_8h.html#a2625d0bebed2f8e1d9f4257e4ed3a02c">ctr_drbg_random</a>( ctx, buf, <a class="code" href="ctr__drbg_8h.html#aa422ee06cd5836113c0068996fa9560c">CTR_DRBG_MAX_INPUT</a> ) ) != 0 )</div>
<div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  <span class="keywordflow">goto</span> exit;</div>
<div class="line"><a name="l00392"></a><span class="lineno"> 392</span> </div>
<div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  <span class="keywordflow">if</span>( fwrite( buf, 1, <a class="code" href="ctr__drbg_8h.html#aa422ee06cd5836113c0068996fa9560c">CTR_DRBG_MAX_INPUT</a>, f ) != <a class="code" href="ctr__drbg_8h.html#aa422ee06cd5836113c0068996fa9560c">CTR_DRBG_MAX_INPUT</a> )</div>
<div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  {</div>
<div class="line"><a name="l00395"></a><span class="lineno"> 395</span>  ret = <a class="code" href="ctr__drbg_8h.html#ac24b26db879708ddef6840f37a1c94aa">POLARSSL_ERR_CTR_DRBG_FILE_IO_ERROR</a>;</div>
<div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  <span class="keywordflow">goto</span> exit;</div>
<div class="line"><a name="l00397"></a><span class="lineno"> 397</span>  }</div>
<div class="line"><a name="l00398"></a><span class="lineno"> 398</span> </div>
<div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  ret = 0;</div>
<div class="line"><a name="l00400"></a><span class="lineno"> 400</span> </div>
<div class="line"><a name="l00401"></a><span class="lineno"> 401</span> exit:</div>
<div class="line"><a name="l00402"></a><span class="lineno"> 402</span>  fclose( f );</div>
<div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  <span class="keywordflow">return</span>( ret );</div>
<div class="line"><a name="l00404"></a><span class="lineno"> 404</span> }</div>
<div class="line"><a name="l00405"></a><span class="lineno"> 405</span> </div>
<div class="line"><a name="l00406"></a><span class="lineno"> 406</span> <span class="keywordtype">int</span> <a class="code" href="ctr__drbg_8h.html#a0aaede25b684a60113dd1d0dc86b0267">ctr_drbg_update_seed_file</a>( <a class="code" href="structctr__drbg__context.html">ctr_drbg_context</a> *ctx, <span class="keyword">const</span> <span class="keywordtype">char</span> *path )</div>
<div class="line"><a name="l00407"></a><span class="lineno"> 407</span> {</div>
<div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  FILE *f;</div>
<div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  <span class="keywordtype">size_t</span> n;</div>
<div class="line"><a name="l00410"></a><span class="lineno"> 410</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> buf[ <a class="code" href="ctr__drbg_8h.html#aa422ee06cd5836113c0068996fa9560c">CTR_DRBG_MAX_INPUT</a> ];</div>
<div class="line"><a name="l00411"></a><span class="lineno"> 411</span> </div>
<div class="line"><a name="l00412"></a><span class="lineno"> 412</span>  <span class="keywordflow">if</span>( ( f = fopen( path, <span class="stringliteral">"rb"</span> ) ) == NULL )</div>
<div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  <span class="keywordflow">return</span>( <a class="code" href="ctr__drbg_8h.html#ac24b26db879708ddef6840f37a1c94aa">POLARSSL_ERR_CTR_DRBG_FILE_IO_ERROR</a> );</div>
<div class="line"><a name="l00414"></a><span class="lineno"> 414</span> </div>
<div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  fseek( f, 0, SEEK_END );</div>
<div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  n = (size_t) ftell( f );</div>
<div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  fseek( f, 0, SEEK_SET );</div>
<div class="line"><a name="l00418"></a><span class="lineno"> 418</span> </div>
<div class="line"><a name="l00419"></a><span class="lineno"> 419</span>  <span class="keywordflow">if</span>( n > <a class="code" href="ctr__drbg_8h.html#aa422ee06cd5836113c0068996fa9560c">CTR_DRBG_MAX_INPUT</a> )</div>
<div class="line"><a name="l00420"></a><span class="lineno"> 420</span>  {</div>
<div class="line"><a name="l00421"></a><span class="lineno"> 421</span>  fclose( f );</div>
<div class="line"><a name="l00422"></a><span class="lineno"> 422</span>  <span class="keywordflow">return</span>( <a class="code" href="ctr__drbg_8h.html#ad2ebdb67b7c42e990590e1b5d6cbadf4">POLARSSL_ERR_CTR_DRBG_INPUT_TOO_BIG</a> );</div>
<div class="line"><a name="l00423"></a><span class="lineno"> 423</span>  }</div>
<div class="line"><a name="l00424"></a><span class="lineno"> 424</span> </div>
<div class="line"><a name="l00425"></a><span class="lineno"> 425</span>  <span class="keywordflow">if</span>( fread( buf, 1, n, f ) != n )</div>
<div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  {</div>
<div class="line"><a name="l00427"></a><span class="lineno"> 427</span>  fclose( f );</div>
<div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  <span class="keywordflow">return</span>( <a class="code" href="ctr__drbg_8h.html#ac24b26db879708ddef6840f37a1c94aa">POLARSSL_ERR_CTR_DRBG_FILE_IO_ERROR</a> );</div>
<div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  }</div>
<div class="line"><a name="l00430"></a><span class="lineno"> 430</span> </div>
<div class="line"><a name="l00431"></a><span class="lineno"> 431</span>  fclose( f );</div>
<div class="line"><a name="l00432"></a><span class="lineno"> 432</span> </div>
<div class="line"><a name="l00433"></a><span class="lineno"> 433</span>  <a class="code" href="ctr__drbg_8h.html#a62b4daaff672263de0827dbe150f21fe">ctr_drbg_update</a>( ctx, buf, n );</div>
<div class="line"><a name="l00434"></a><span class="lineno"> 434</span> </div>
<div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  <span class="keywordflow">return</span>( <a class="code" href="ctr__drbg_8h.html#a1fbf41eb924ef6d0cabfdf586696ccd0">ctr_drbg_write_seed_file</a>( ctx, path ) );</div>
<div class="line"><a name="l00436"></a><span class="lineno"> 436</span> }</div>
<div class="line"><a name="l00437"></a><span class="lineno"> 437</span> <span class="preprocessor">#endif </span><span class="comment">/* POLARSSL_FS_IO */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00438"></a><span class="lineno"> 438</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00439"></a><span class="lineno"> 439</span> <span class="preprocessor">#if defined(POLARSSL_SELF_TEST)</span></div>
<div class="line"><a name="l00440"></a><span class="lineno"> 440</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00441"></a><span class="lineno"> 441</span> <span class="preprocessor">#include <stdio.h></span></div>
<div class="line"><a name="l00442"></a><span class="lineno"> 442</span> </div>
<div class="line"><a name="l00443"></a><span class="lineno"> 443</span> <span class="keyword">static</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> entropy_source_pr[96] =</div>
<div class="line"><a name="l00444"></a><span class="lineno"> 444</span>  { 0xc1, 0x80, 0x81, 0xa6, 0x5d, 0x44, 0x02, 0x16,</div>
<div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  0x19, 0xb3, 0xf1, 0x80, 0xb1, 0xc9, 0x20, 0x02,</div>
<div class="line"><a name="l00446"></a><span class="lineno"> 446</span>  0x6a, 0x54, 0x6f, 0x0c, 0x70, 0x81, 0x49, 0x8b,</div>
<div class="line"><a name="l00447"></a><span class="lineno"> 447</span>  0x6e, 0xa6, 0x62, 0x52, 0x6d, 0x51, 0xb1, 0xcb,</div>
<div class="line"><a name="l00448"></a><span class="lineno"> 448</span>  0x58, 0x3b, 0xfa, 0xd5, 0x37, 0x5f, 0xfb, 0xc9,</div>
<div class="line"><a name="l00449"></a><span class="lineno"> 449</span>  0xff, 0x46, 0xd2, 0x19, 0xc7, 0x22, 0x3e, 0x95,</div>
<div class="line"><a name="l00450"></a><span class="lineno"> 450</span>  0x45, 0x9d, 0x82, 0xe1, 0xe7, 0x22, 0x9f, 0x63,</div>
<div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  0x31, 0x69, 0xd2, 0x6b, 0x57, 0x47, 0x4f, 0xa3,</div>
<div class="line"><a name="l00452"></a><span class="lineno"> 452</span>  0x37, 0xc9, 0x98, 0x1c, 0x0b, 0xfb, 0x91, 0x31,</div>
<div class="line"><a name="l00453"></a><span class="lineno"> 453</span>  0x4d, 0x55, 0xb9, 0xe9, 0x1c, 0x5a, 0x5e, 0xe4,</div>
<div class="line"><a name="l00454"></a><span class="lineno"> 454</span>  0x93, 0x92, 0xcf, 0xc5, 0x23, 0x12, 0xd5, 0x56,</div>
<div class="line"><a name="l00455"></a><span class="lineno"> 455</span>  0x2c, 0x4a, 0x6e, 0xff, 0xdc, 0x10, 0xd0, 0x68 };</div>
<div class="line"><a name="l00456"></a><span class="lineno"> 456</span> </div>
<div class="line"><a name="l00457"></a><span class="lineno"> 457</span> <span class="keyword">static</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> entropy_source_nopr[64] =</div>
<div class="line"><a name="l00458"></a><span class="lineno"> 458</span>  { 0x5a, 0x19, 0x4d, 0x5e, 0x2b, 0x31, 0x58, 0x14,</div>
<div class="line"><a name="l00459"></a><span class="lineno"> 459</span>  0x54, 0xde, 0xf6, 0x75, 0xfb, 0x79, 0x58, 0xfe,</div>
<div class="line"><a name="l00460"></a><span class="lineno"> 460</span>  0xc7, 0xdb, 0x87, 0x3e, 0x56, 0x89, 0xfc, 0x9d,</div>
<div class="line"><a name="l00461"></a><span class="lineno"> 461</span>  0x03, 0x21, 0x7c, 0x68, 0xd8, 0x03, 0x38, 0x20,</div>
<div class="line"><a name="l00462"></a><span class="lineno"> 462</span>  0xf9, 0xe6, 0x5e, 0x04, 0xd8, 0x56, 0xf3, 0xa9,</div>
<div class="line"><a name="l00463"></a><span class="lineno"> 463</span>  0xc4, 0x4a, 0x4c, 0xbd, 0xc1, 0xd0, 0x08, 0x46,</div>
<div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  0xf5, 0x98, 0x3d, 0x77, 0x1c, 0x1b, 0x13, 0x7e,</div>
<div class="line"><a name="l00465"></a><span class="lineno"> 465</span>  0x4e, 0x0f, 0x9d, 0x8e, 0xf4, 0x09, 0xf9, 0x2e };</div>
<div class="line"><a name="l00466"></a><span class="lineno"> 466</span> </div>
<div class="line"><a name="l00467"></a><span class="lineno"> 467</span> <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> nonce_pers_pr[16] =</div>
<div class="line"><a name="l00468"></a><span class="lineno"> 468</span>  { 0xd2, 0x54, 0xfc, 0xff, 0x02, 0x1e, 0x69, 0xd2,</div>
<div class="line"><a name="l00469"></a><span class="lineno"> 469</span>  0x29, 0xc9, 0xcf, 0xad, 0x85, 0xfa, 0x48, 0x6c };</div>
<div class="line"><a name="l00470"></a><span class="lineno"> 470</span> </div>
<div class="line"><a name="l00471"></a><span class="lineno"> 471</span> <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> nonce_pers_nopr[16] =</div>
<div class="line"><a name="l00472"></a><span class="lineno"> 472</span>  { 0x1b, 0x54, 0xb8, 0xff, 0x06, 0x42, 0xbf, 0xf5,</div>
<div class="line"><a name="l00473"></a><span class="lineno"> 473</span>  0x21, 0xf1, 0x5c, 0x1c, 0x0b, 0x66, 0x5f, 0x3f };</div>
<div class="line"><a name="l00474"></a><span class="lineno"> 474</span> </div>
<div class="line"><a name="l00475"></a><span class="lineno"> 475</span> <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> result_pr[16] =</div>
<div class="line"><a name="l00476"></a><span class="lineno"> 476</span>  { 0x34, 0x01, 0x16, 0x56, 0xb4, 0x29, 0x00, 0x8f,</div>
<div class="line"><a name="l00477"></a><span class="lineno"> 477</span>  0x35, 0x63, 0xec, 0xb5, 0xf2, 0x59, 0x07, 0x23 };</div>
<div class="line"><a name="l00478"></a><span class="lineno"> 478</span> </div>
<div class="line"><a name="l00479"></a><span class="lineno"> 479</span> <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> result_nopr[16] =</div>
<div class="line"><a name="l00480"></a><span class="lineno"> 480</span>  { 0xa0, 0x54, 0x30, 0x3d, 0x8a, 0x7e, 0xa9, 0x88,</div>
<div class="line"><a name="l00481"></a><span class="lineno"> 481</span>  0x9d, 0x90, 0x3e, 0x07, 0x7c, 0x6f, 0x21, 0x8f };</div>
<div class="line"><a name="l00482"></a><span class="lineno"> 482</span> </div>
<div class="line"><a name="l00483"></a><span class="lineno"> 483</span> <span class="keyword">static</span> <span class="keywordtype">size_t</span> test_offset;</div>
<div class="line"><a name="l00484"></a><span class="lineno"> 484</span> <span class="keyword">static</span> <span class="keywordtype">int</span> ctr_drbg_self_test_entropy( <span class="keywordtype">void</span> *data, <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *buf,</div>
<div class="line"><a name="l00485"></a><span class="lineno"> 485</span>  <span class="keywordtype">size_t</span> len )</div>
<div class="line"><a name="l00486"></a><span class="lineno"> 486</span> {</div>
<div class="line"><a name="l00487"></a><span class="lineno"> 487</span>  <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *p = data;</div>
<div class="line"><a name="l00488"></a><span class="lineno"> 488</span>  memcpy( buf, p + test_offset, len );</div>
<div class="line"><a name="l00489"></a><span class="lineno"> 489</span>  test_offset += len;</div>
<div class="line"><a name="l00490"></a><span class="lineno"> 490</span>  <span class="keywordflow">return</span>( 0 );</div>
<div class="line"><a name="l00491"></a><span class="lineno"> 491</span> }</div>
<div class="line"><a name="l00492"></a><span class="lineno"> 492</span> </div>
<div class="line"><a name="l00493"></a><span class="lineno"> 493</span> <span class="preprocessor">#define CHK( c ) if( (c) != 0 ) \</span></div>
<div class="line"><a name="l00494"></a><span class="lineno"> 494</span> <span class="preprocessor"> { \</span></div>
<div class="line"><a name="l00495"></a><span class="lineno"> 495</span> <span class="preprocessor"> if( verbose != 0 ) \</span></div>
<div class="line"><a name="l00496"></a><span class="lineno"> 496</span> <span class="preprocessor"> polarssl_printf( "failed\n" ); \</span></div>
<div class="line"><a name="l00497"></a><span class="lineno"> 497</span> <span class="preprocessor"> return( 1 ); \</span></div>
<div class="line"><a name="l00498"></a><span class="lineno"> 498</span> <span class="preprocessor"> }</span></div>
<div class="line"><a name="l00499"></a><span class="lineno"> 499</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00500"></a><span class="lineno"> 500</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00501"></a><span class="lineno"> 501</span> <span class="comment"> * Checkup routine</span></div>
<div class="line"><a name="l00502"></a><span class="lineno"> 502</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00503"></a><span class="lineno"> 503</span> <span class="keywordtype">int</span> <a class="code" href="ctr__drbg_8h.html#aa1bdc01be25861d3b5f51565a7604c6a">ctr_drbg_self_test</a>( <span class="keywordtype">int</span> verbose )</div>
<div class="line"><a name="l00504"></a><span class="lineno"> 504</span> {</div>
<div class="line"><a name="l00505"></a><span class="lineno"> 505</span>  <a class="code" href="structctr__drbg__context.html">ctr_drbg_context</a> ctx;</div>
<div class="line"><a name="l00506"></a><span class="lineno"> 506</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> buf[16];</div>
<div class="line"><a name="l00507"></a><span class="lineno"> 507</span> </div>
<div class="line"><a name="l00508"></a><span class="lineno"> 508</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00509"></a><span class="lineno"> 509</span> <span class="comment"> * Based on a NIST CTR_DRBG test vector (PR = True)</span></div>
<div class="line"><a name="l00510"></a><span class="lineno"> 510</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00511"></a><span class="lineno"> 511</span>  <span class="keywordflow">if</span>( verbose != 0 )</div>
<div class="line"><a name="l00512"></a><span class="lineno"> 512</span>  <a class="code" href="test__suite__aes_8cbc_8c.html#afc6a7362c0f0c9cfa8fc76b3281e2b37">polarssl_printf</a>( <span class="stringliteral">" CTR_DRBG (PR = TRUE) : "</span> );</div>
<div class="line"><a name="l00513"></a><span class="lineno"> 513</span> </div>
<div class="line"><a name="l00514"></a><span class="lineno"> 514</span>  test_offset = 0;</div>
<div class="line"><a name="l00515"></a><span class="lineno"> 515</span>  CHK( <a class="code" href="ctr__drbg_8h.html#a15775822b651b6201d796fab79ce7fd5">ctr_drbg_init_entropy_len</a>( &ctx, ctr_drbg_self_test_entropy,</div>
<div class="line"><a name="l00516"></a><span class="lineno"> 516</span>  entropy_source_pr, nonce_pers_pr, 16, 32 ) );</div>
<div class="line"><a name="l00517"></a><span class="lineno"> 517</span>  <a class="code" href="ctr__drbg_8h.html#a0a4b47f2f9c153ca84ff3f27193dcfec">ctr_drbg_set_prediction_resistance</a>( &ctx, <a class="code" href="ctr__drbg_8h.html#ac689b93ae32164241a48cee742a8fc74">CTR_DRBG_PR_ON</a> );</div>
<div class="line"><a name="l00518"></a><span class="lineno"> 518</span>  CHK( <a class="code" href="ctr__drbg_8h.html#a2625d0bebed2f8e1d9f4257e4ed3a02c">ctr_drbg_random</a>( &ctx, buf, CTR_DRBG_BLOCKSIZE ) );</div>
<div class="line"><a name="l00519"></a><span class="lineno"> 519</span>  CHK( <a class="code" href="ctr__drbg_8h.html#a2625d0bebed2f8e1d9f4257e4ed3a02c">ctr_drbg_random</a>( &ctx, buf, CTR_DRBG_BLOCKSIZE ) );</div>
<div class="line"><a name="l00520"></a><span class="lineno"> 520</span>  CHK( memcmp( buf, result_pr, CTR_DRBG_BLOCKSIZE ) );</div>
<div class="line"><a name="l00521"></a><span class="lineno"> 521</span> </div>
<div class="line"><a name="l00522"></a><span class="lineno"> 522</span>  <span class="keywordflow">if</span>( verbose != 0 )</div>
<div class="line"><a name="l00523"></a><span class="lineno"> 523</span>  <a class="code" href="test__suite__aes_8cbc_8c.html#afc6a7362c0f0c9cfa8fc76b3281e2b37">polarssl_printf</a>( <span class="stringliteral">"passed\n"</span> );</div>
<div class="line"><a name="l00524"></a><span class="lineno"> 524</span> </div>
<div class="line"><a name="l00525"></a><span class="lineno"> 525</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00526"></a><span class="lineno"> 526</span> <span class="comment"> * Based on a NIST CTR_DRBG test vector (PR = FALSE)</span></div>
<div class="line"><a name="l00527"></a><span class="lineno"> 527</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00528"></a><span class="lineno"> 528</span>  <span class="keywordflow">if</span>( verbose != 0 )</div>
<div class="line"><a name="l00529"></a><span class="lineno"> 529</span>  <a class="code" href="test__suite__aes_8cbc_8c.html#afc6a7362c0f0c9cfa8fc76b3281e2b37">polarssl_printf</a>( <span class="stringliteral">" CTR_DRBG (PR = FALSE): "</span> );</div>
<div class="line"><a name="l00530"></a><span class="lineno"> 530</span> </div>
<div class="line"><a name="l00531"></a><span class="lineno"> 531</span>  test_offset = 0;</div>
<div class="line"><a name="l00532"></a><span class="lineno"> 532</span>  CHK( <a class="code" href="ctr__drbg_8h.html#a15775822b651b6201d796fab79ce7fd5">ctr_drbg_init_entropy_len</a>( &ctx, ctr_drbg_self_test_entropy,</div>
<div class="line"><a name="l00533"></a><span class="lineno"> 533</span>  entropy_source_nopr, nonce_pers_nopr, 16, 32 ) );</div>
<div class="line"><a name="l00534"></a><span class="lineno"> 534</span>  CHK( <a class="code" href="ctr__drbg_8h.html#a2625d0bebed2f8e1d9f4257e4ed3a02c">ctr_drbg_random</a>( &ctx, buf, 16 ) );</div>
<div class="line"><a name="l00535"></a><span class="lineno"> 535</span>  CHK( <a class="code" href="ctr__drbg_8h.html#af958b326a8a3f7c168867d999a9b6b55">ctr_drbg_reseed</a>( &ctx, NULL, 0 ) );</div>
<div class="line"><a name="l00536"></a><span class="lineno"> 536</span>  CHK( <a class="code" href="ctr__drbg_8h.html#a2625d0bebed2f8e1d9f4257e4ed3a02c">ctr_drbg_random</a>( &ctx, buf, 16 ) );</div>
<div class="line"><a name="l00537"></a><span class="lineno"> 537</span>  CHK( memcmp( buf, result_nopr, 16 ) );</div>
<div class="line"><a name="l00538"></a><span class="lineno"> 538</span> </div>
<div class="line"><a name="l00539"></a><span class="lineno"> 539</span>  <span class="keywordflow">if</span>( verbose != 0 )</div>
<div class="line"><a name="l00540"></a><span class="lineno"> 540</span>  <a class="code" href="test__suite__aes_8cbc_8c.html#afc6a7362c0f0c9cfa8fc76b3281e2b37">polarssl_printf</a>( <span class="stringliteral">"passed\n"</span> );</div>
<div class="line"><a name="l00541"></a><span class="lineno"> 541</span> </div>
<div class="line"><a name="l00542"></a><span class="lineno"> 542</span>  <span class="keywordflow">if</span>( verbose != 0 )</div>
<div class="line"><a name="l00543"></a><span class="lineno"> 543</span>  <a class="code" href="test__suite__aes_8cbc_8c.html#afc6a7362c0f0c9cfa8fc76b3281e2b37">polarssl_printf</a>( <span class="stringliteral">"\n"</span> );</div>
<div class="line"><a name="l00544"></a><span class="lineno"> 544</span> </div>
<div class="line"><a name="l00545"></a><span class="lineno"> 545</span>  <span class="keywordflow">return</span>( 0 );</div>
<div class="line"><a name="l00546"></a><span class="lineno"> 546</span> }</div>
<div class="line"><a name="l00547"></a><span class="lineno"> 547</span> <span class="preprocessor">#endif </span><span class="comment">/* POLARSSL_SELF_TEST */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00548"></a><span class="lineno"> 548</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00549"></a><span class="lineno"> 549</span> <span class="preprocessor">#endif </span><span class="comment">/* POLARSSL_CTR_DRBG_C */</span><span class="preprocessor"></span></div>
<div class="ttc" id="ctr__drbg_8h_html_a29337787324ee83801279c2bb3debfb3"><div class="ttname"><a href="ctr__drbg_8h.html#a29337787324ee83801279c2bb3debfb3">POLARSSL_ERR_CTR_DRBG_ENTROPY_SOURCE_FAILED</a></div><div class="ttdeci">#define POLARSSL_ERR_CTR_DRBG_ENTROPY_SOURCE_FAILED</div><div class="ttdoc">The entropy source failed. </div><div class="ttdef"><b>Definition:</b> <a href="ctr__drbg_8h_source.html#l00034">ctr_drbg.h:34</a></div></div>
<div class="ttc" id="ctr__drbg_8h_html_a2625d0bebed2f8e1d9f4257e4ed3a02c"><div class="ttname"><a href="ctr__drbg_8h.html#a2625d0bebed2f8e1d9f4257e4ed3a02c">ctr_drbg_random</a></div><div class="ttdeci">int ctr_drbg_random(void *p_rng, unsigned char *output, size_t output_len)</div><div class="ttdoc">CTR_DRBG generate random. </div></div>
<div class="ttc" id="ctr__drbg_8h_html_a0a4b47f2f9c153ca84ff3f27193dcfec"><div class="ttname"><a href="ctr__drbg_8h.html#a0a4b47f2f9c153ca84ff3f27193dcfec">ctr_drbg_set_prediction_resistance</a></div><div class="ttdeci">void ctr_drbg_set_prediction_resistance(ctr_drbg_context *ctx, int resistance)</div><div class="ttdoc">Enable / disable prediction resistance (Default: Off) </div></div>
<div class="ttc" id="test__suite__aes_8cbc_8c_html_afc6a7362c0f0c9cfa8fc76b3281e2b37"><div class="ttname"><a href="test__suite__aes_8cbc_8c.html#afc6a7362c0f0c9cfa8fc76b3281e2b37">polarssl_printf</a></div><div class="ttdeci">#define polarssl_printf</div><div class="ttdef"><b>Definition:</b> <a href="test__suite__aes_8cbc_8c_source.html#l00309">test_suite_aes.cbc.c:309</a></div></div>
<div class="ttc" id="ctr__drbg_8h_html_ac689b93ae32164241a48cee742a8fc74"><div class="ttname"><a href="ctr__drbg_8h.html#ac689b93ae32164241a48cee742a8fc74">CTR_DRBG_PR_ON</a></div><div class="ttdeci">#define CTR_DRBG_PR_ON</div><div class="ttdoc">Prediction resistance enabled. </div><div class="ttdef"><b>Definition:</b> <a href="ctr__drbg_8h_source.html#l00080">ctr_drbg.h:80</a></div></div>
<div class="ttc" id="ctr__drbg_8h_html_aa422ee06cd5836113c0068996fa9560c"><div class="ttname"><a href="ctr__drbg_8h.html#aa422ee06cd5836113c0068996fa9560c">CTR_DRBG_MAX_INPUT</a></div><div class="ttdeci">#define CTR_DRBG_MAX_INPUT</div><div class="ttdoc">Maximum number of additional input bytes. </div><div class="ttdef"><b>Definition:</b> <a href="ctr__drbg_8h_source.html#l00066">ctr_drbg.h:66</a></div></div>
<div class="ttc" id="ctr__drbg_8h_html_aeeb6d3716faa516c3b90d6587de119dc"><div class="ttname"><a href="ctr__drbg_8h.html#aeeb6d3716faa516c3b90d6587de119dc">CTR_DRBG_MAX_SEED_INPUT</a></div><div class="ttdeci">#define CTR_DRBG_MAX_SEED_INPUT</div><div class="ttdoc">Maximum size of (re)seed buffer. </div><div class="ttdef"><b>Definition:</b> <a href="ctr__drbg_8h_source.html#l00074">ctr_drbg.h:74</a></div></div>
<div class="ttc" id="ctr__drbg_8h_html_aada2905e3923ac30ff08869396fa715a"><div class="ttname"><a href="ctr__drbg_8h.html#aada2905e3923ac30ff08869396fa715a">CTR_DRBG_RESEED_INTERVAL</a></div><div class="ttdeci">#define CTR_DRBG_RESEED_INTERVAL</div><div class="ttdoc">Interval before reseed is performed by default. </div><div class="ttdef"><b>Definition:</b> <a href="ctr__drbg_8h_source.html#l00062">ctr_drbg.h:62</a></div></div>
<div class="ttc" id="structctr__drbg__context_html_aec37b4eec92c064eb61e404d6d506419"><div class="ttname"><a href="structctr__drbg__context.html#aec37b4eec92c064eb61e404d6d506419">ctr_drbg_context::reseed_counter</a></div><div class="ttdeci">int reseed_counter</div><div class="ttdef"><b>Definition:</b> <a href="ctr__drbg_8h_source.html#l00092">ctr_drbg.h:92</a></div></div>
<div class="ttc" id="structaes__context_html"><div class="ttname"><a href="structaes__context.html">aes_context</a></div><div class="ttdoc">AES context structure. </div><div class="ttdef"><b>Definition:</b> <a href="aes_8h_source.html#l00068">aes.h:68</a></div></div>
<div class="ttc" id="config_8h_html"><div class="ttname"><a href="config_8h.html">config.h</a></div><div class="ttdoc">Configuration options (set of defines) </div></div>
<div class="ttc" id="ctr__drbg_8h_html_af58c0660e33c9f98a934e01e1e9a9d0b"><div class="ttname"><a href="ctr__drbg_8h.html#af58c0660e33c9f98a934e01e1e9a9d0b">ctr_drbg_free</a></div><div class="ttdeci">void ctr_drbg_free(ctr_drbg_context *ctx)</div><div class="ttdoc">Clear CTR_CRBG context data. </div></div>
<div class="ttc" id="platform_8h_html"><div class="ttname"><a href="platform_8h.html">platform.h</a></div><div class="ttdoc">PolarSSL Platform abstraction layer. </div></div>
<div class="ttc" id="ctr__drbg_8h_html_a15775822b651b6201d796fab79ce7fd5"><div class="ttname"><a href="ctr__drbg_8h.html#a15775822b651b6201d796fab79ce7fd5">ctr_drbg_init_entropy_len</a></div><div class="ttdeci">int ctr_drbg_init_entropy_len(ctr_drbg_context *, int(*)(void *, unsigned char *, size_t), void *, const unsigned char *, size_t, size_t)</div></div>
<div class="ttc" id="ctr__drbg_8h_html_a7e724588e94f73bd3fb7623e3f191913"><div class="ttname"><a href="ctr__drbg_8h.html#a7e724588e94f73bd3fb7623e3f191913">CTR_DRBG_KEYSIZE</a></div><div class="ttdeci">#define CTR_DRBG_KEYSIZE</div><div class="ttdoc">Key size used by the cipher. </div><div class="ttdef"><b>Definition:</b> <a href="ctr__drbg_8h_source.html#l00040">ctr_drbg.h:40</a></div></div>
<div class="ttc" id="ctr__drbg_8h_html_a907251d56e7adb3d795bfe04e1f36865"><div class="ttname"><a href="ctr__drbg_8h.html#a907251d56e7adb3d795bfe04e1f36865">CTR_DRBG_BLOCKSIZE</a></div><div class="ttdeci">#define CTR_DRBG_BLOCKSIZE</div><div class="ttdoc">Block size used by the cipher. </div><div class="ttdef"><b>Definition:</b> <a href="ctr__drbg_8h_source.html#l00039">ctr_drbg.h:39</a></div></div>
<div class="ttc" id="ctr__drbg_8h_html_aad464fda72b082db273843523b6de363"><div class="ttname"><a href="ctr__drbg_8h.html#aad464fda72b082db273843523b6de363">CTR_DRBG_ENTROPY_LEN</a></div><div class="ttdeci">#define CTR_DRBG_ENTROPY_LEN</div><div class="ttdoc">Amount of entropy used per seed by default (48 with SHA-512, 32 with SHA-256) </div><div class="ttdef"><b>Definition:</b> <a href="ctr__drbg_8h_source.html#l00055">ctr_drbg.h:55</a></div></div>
<div class="ttc" id="structctr__drbg__context_html_a73bfaff58a084d6903e2bfdf09255216"><div class="ttname"><a href="structctr__drbg__context.html#a73bfaff58a084d6903e2bfdf09255216">ctr_drbg_context::prediction_resistance</a></div><div class="ttdeci">int prediction_resistance</div><div class="ttdef"><b>Definition:</b> <a href="ctr__drbg_8h_source.html#l00093">ctr_drbg.h:93</a></div></div>
<div class="ttc" id="ctr__drbg_8h_html_a4ec9724247956f9b2004beb3998cbf4b"><div class="ttname"><a href="ctr__drbg_8h.html#a4ec9724247956f9b2004beb3998cbf4b">POLARSSL_ERR_CTR_DRBG_REQUEST_TOO_BIG</a></div><div class="ttdeci">#define POLARSSL_ERR_CTR_DRBG_REQUEST_TOO_BIG</div><div class="ttdoc">Too many random requested in single call. </div><div class="ttdef"><b>Definition:</b> <a href="ctr__drbg_8h_source.html#l00035">ctr_drbg.h:35</a></div></div>
<div class="ttc" id="ctr__drbg_8h_html_a7484335f1f0e7460c06e0e949e6a5a95"><div class="ttname"><a href="ctr__drbg_8h.html#a7484335f1f0e7460c06e0e949e6a5a95">ctr_drbg_random_with_add</a></div><div class="ttdeci">int ctr_drbg_random_with_add(void *p_rng, unsigned char *output, size_t output_len, const unsigned char *additional, size_t add_len)</div><div class="ttdoc">CTR_DRBG generate random with additional update input. </div></div>
<div class="ttc" id="structctr__drbg__context_html_a65a0be04e3bdad14d9b89244afde1d98"><div class="ttname"><a href="structctr__drbg__context.html#a65a0be04e3bdad14d9b89244afde1d98">ctr_drbg_context::entropy_len</a></div><div class="ttdeci">size_t entropy_len</div><div class="ttdef"><b>Definition:</b> <a href="ctr__drbg_8h_source.html#l00095">ctr_drbg.h:95</a></div></div>
<div class="ttc" id="ctr__drbg_8h_html_ac24b26db879708ddef6840f37a1c94aa"><div class="ttname"><a href="ctr__drbg_8h.html#ac24b26db879708ddef6840f37a1c94aa">POLARSSL_ERR_CTR_DRBG_FILE_IO_ERROR</a></div><div class="ttdeci">#define POLARSSL_ERR_CTR_DRBG_FILE_IO_ERROR</div><div class="ttdoc">Read/write error in file. </div><div class="ttdef"><b>Definition:</b> <a href="ctr__drbg_8h_source.html#l00037">ctr_drbg.h:37</a></div></div>
<div class="ttc" id="structctr__drbg__context_html_ab7a56989db1a28061fcf59330fd5ebab"><div class="ttname"><a href="structctr__drbg__context.html#ab7a56989db1a28061fcf59330fd5ebab">ctr_drbg_context::counter</a></div><div class="ttdeci">unsigned char counter[16]</div><div class="ttdef"><b>Definition:</b> <a href="ctr__drbg_8h_source.html#l00091">ctr_drbg.h:91</a></div></div>
<div class="ttc" id="ctr__drbg_8h_html_af958b326a8a3f7c168867d999a9b6b55"><div class="ttname"><a href="ctr__drbg_8h.html#af958b326a8a3f7c168867d999a9b6b55">ctr_drbg_reseed</a></div><div class="ttdeci">int ctr_drbg_reseed(ctr_drbg_context *ctx, const unsigned char *additional, size_t len)</div><div class="ttdoc">CTR_DRBG reseeding (extracts data from entropy source) </div></div>
<div class="ttc" id="structctr__drbg__context_html_af6a62a0ef862fe4abcd7c580736e5c23"><div class="ttname"><a href="structctr__drbg__context.html#af6a62a0ef862fe4abcd7c580736e5c23">ctr_drbg_context::reseed_interval</a></div><div class="ttdeci">int reseed_interval</div><div class="ttdef"><b>Definition:</b> <a href="ctr__drbg_8h_source.html#l00097">ctr_drbg.h:97</a></div></div>
<div class="ttc" id="ctr__drbg_8h_html_ad2ebdb67b7c42e990590e1b5d6cbadf4"><div class="ttname"><a href="ctr__drbg_8h.html#ad2ebdb67b7c42e990590e1b5d6cbadf4">POLARSSL_ERR_CTR_DRBG_INPUT_TOO_BIG</a></div><div class="ttdeci">#define POLARSSL_ERR_CTR_DRBG_INPUT_TOO_BIG</div><div class="ttdoc">Input too large (Entropy + additional). </div><div class="ttdef"><b>Definition:</b> <a href="ctr__drbg_8h_source.html#l00036">ctr_drbg.h:36</a></div></div>
<div class="ttc" id="aes_8h_html_a91e721bca5c6db6402fc3a4781d69b10"><div class="ttname"><a href="aes_8h.html#a91e721bca5c6db6402fc3a4781d69b10">AES_ENCRYPT</a></div><div class="ttdeci">#define AES_ENCRYPT</div><div class="ttdef"><b>Definition:</b> <a href="aes_8h_source.html#l00046">aes.h:46</a></div></div>
<div class="ttc" id="structctr__drbg__context_html"><div class="ttname"><a href="structctr__drbg__context.html">ctr_drbg_context</a></div><div class="ttdoc">CTR_DRBG context structure. </div><div class="ttdef"><b>Definition:</b> <a href="ctr__drbg_8h_source.html#l00089">ctr_drbg.h:89</a></div></div>
<div class="ttc" id="ctr__drbg_8h_html_ad7fddfff369d259329ff0f7c64063da0"><div class="ttname"><a href="ctr__drbg_8h.html#ad7fddfff369d259329ff0f7c64063da0">CTR_DRBG_KEYBITS</a></div><div class="ttdeci">#define CTR_DRBG_KEYBITS</div><div class="ttdef"><b>Definition:</b> <a href="ctr__drbg_8h_source.html#l00041">ctr_drbg.h:41</a></div></div>
<div class="ttc" id="structctr__drbg__context_html_ab4a8f86eedb85daf0ffcbe8b5aae86a4"><div class="ttname"><a href="structctr__drbg__context.html#ab4a8f86eedb85daf0ffcbe8b5aae86a4">ctr_drbg_context::p_entropy</a></div><div class="ttdeci">void * p_entropy</div><div class="ttdef"><b>Definition:</b> <a href="ctr__drbg_8h_source.html#l00106">ctr_drbg.h:106</a></div></div>
<div class="ttc" id="ctr__drbg_8h_html_ab2109628bba8f8548bf5f0d18bf18cd8"><div class="ttname"><a href="ctr__drbg_8h.html#ab2109628bba8f8548bf5f0d18bf18cd8">CTR_DRBG_SEEDLEN</a></div><div class="ttdeci">#define CTR_DRBG_SEEDLEN</div><div class="ttdoc">The seed length (counter + AES key) </div><div class="ttdef"><b>Definition:</b> <a href="ctr__drbg_8h_source.html#l00042">ctr_drbg.h:42</a></div></div>
<div class="ttc" id="ctr__drbg_8h_html_a2ce2d084b5c2a25d7dafb912c73b24a6"><div class="ttname"><a href="ctr__drbg_8h.html#a2ce2d084b5c2a25d7dafb912c73b24a6">ctr_drbg_set_reseed_interval</a></div><div class="ttdeci">void ctr_drbg_set_reseed_interval(ctr_drbg_context *ctx, int interval)</div><div class="ttdoc">Set the reseed interval (Default: CTR_DRBG_RESEED_INTERVAL) </div></div>
<div class="ttc" id="ctr__drbg_8h_html_a0aaede25b684a60113dd1d0dc86b0267"><div class="ttname"><a href="ctr__drbg_8h.html#a0aaede25b684a60113dd1d0dc86b0267">ctr_drbg_update_seed_file</a></div><div class="ttdeci">int ctr_drbg_update_seed_file(ctr_drbg_context *ctx, const char *path)</div><div class="ttdoc">Read and update a seed file. </div></div>
<div class="ttc" id="aes_8h_html_a9ae37ee8cfabac5da5df9a573c34850f"><div class="ttname"><a href="aes_8h.html#a9ae37ee8cfabac5da5df9a573c34850f">aes_free</a></div><div class="ttdeci">void aes_free(aes_context *ctx)</div><div class="ttdoc">Clear AES context. </div></div>
<div class="ttc" id="ctr__drbg_8h_html_a48c1d04815d90f4d191e848209483ffd"><div class="ttname"><a href="ctr__drbg_8h.html#a48c1d04815d90f4d191e848209483ffd">ctr_drbg_set_entropy_len</a></div><div class="ttdeci">void ctr_drbg_set_entropy_len(ctr_drbg_context *ctx, size_t len)</div><div class="ttdoc">Set the amount of entropy grabbed on each (re)seed (Default: CTR_DRBG_ENTROPY_LEN) ...</div></div>
<div class="ttc" id="ctr__drbg_8h_html_aa1bdc01be25861d3b5f51565a7604c6a"><div class="ttname"><a href="ctr__drbg_8h.html#aa1bdc01be25861d3b5f51565a7604c6a">ctr_drbg_self_test</a></div><div class="ttdeci">int ctr_drbg_self_test(int verbose)</div><div class="ttdoc">Checkup routine. </div></div>
<div class="ttc" id="ctr__drbg_8h_html_a0e27d989ba78d2a5a40166d68a1b7bdb"><div class="ttname"><a href="ctr__drbg_8h.html#a0e27d989ba78d2a5a40166d68a1b7bdb">ctr_drbg_init</a></div><div class="ttdeci">int ctr_drbg_init(ctr_drbg_context *ctx, int(*f_entropy)(void *, unsigned char *, size_t), void *p_entropy, const unsigned char *custom, size_t len)</div><div class="ttdoc">CTR_DRBG initialization. </div></div>
<div class="ttc" id="structctr__drbg__context_html_a73bb2a2ded8df0ac180fb308ac628671"><div class="ttname"><a href="structctr__drbg__context.html#a73bb2a2ded8df0ac180fb308ac628671">ctr_drbg_context::aes_ctx</a></div><div class="ttdeci">aes_context aes_ctx</div><div class="ttdef"><b>Definition:</b> <a href="ctr__drbg_8h_source.html#l00099">ctr_drbg.h:99</a></div></div>
<div class="ttc" id="structctr__drbg__context_html_afa8f09f491d90d9a6d9cfc61e521d457"><div class="ttname"><a href="structctr__drbg__context.html#afa8f09f491d90d9a6d9cfc61e521d457">ctr_drbg_context::f_entropy</a></div><div class="ttdeci">int(* f_entropy)(void *, unsigned char *, size_t)</div><div class="ttdef"><b>Definition:</b> <a href="ctr__drbg_8h_source.html#l00104">ctr_drbg.h:104</a></div></div>
<div class="ttc" id="ctr__drbg_8h_html_a1fbf41eb924ef6d0cabfdf586696ccd0"><div class="ttname"><a href="ctr__drbg_8h.html#a1fbf41eb924ef6d0cabfdf586696ccd0">ctr_drbg_write_seed_file</a></div><div class="ttdeci">int ctr_drbg_write_seed_file(ctr_drbg_context *ctx, const char *path)</div><div class="ttdoc">Write a seed file. </div></div>
<div class="ttc" id="ctr__drbg_8h_html_a97273e0c80ab6111bf79f05834f174bf"><div class="ttname"><a href="ctr__drbg_8h.html#a97273e0c80ab6111bf79f05834f174bf">CTR_DRBG_MAX_REQUEST</a></div><div class="ttdeci">#define CTR_DRBG_MAX_REQUEST</div><div class="ttdoc">Maximum number of requested bytes per call. </div><div class="ttdef"><b>Definition:</b> <a href="ctr__drbg_8h_source.html#l00070">ctr_drbg.h:70</a></div></div>
<div class="ttc" id="ctr__drbg_8h_html_a62b4daaff672263de0827dbe150f21fe"><div class="ttname"><a href="ctr__drbg_8h.html#a62b4daaff672263de0827dbe150f21fe">ctr_drbg_update</a></div><div class="ttdeci">void ctr_drbg_update(ctr_drbg_context *ctx, const unsigned char *additional, size_t add_len)</div><div class="ttdoc">CTR_DRBG update state. </div></div>
<div class="ttc" id="aes_8h_html_a10f4e5fcaa4c08daf9c7a165a59c7969"><div class="ttname"><a href="aes_8h.html#a10f4e5fcaa4c08daf9c7a165a59c7969">aes_setkey_enc</a></div><div class="ttdeci">int aes_setkey_enc(aes_context *ctx, const unsigned char *key, unsigned int keysize)</div><div class="ttdoc">AES key schedule (encryption) </div></div>
<div class="ttc" id="aes_8h_html_a0c80313f1e98a573f0876366c35f0445"><div class="ttname"><a href="aes_8h.html#a0c80313f1e98a573f0876366c35f0445">aes_crypt_ecb</a></div><div class="ttdeci">int aes_crypt_ecb(aes_context *ctx, int mode, const unsigned char input[16], unsigned char output[16])</div><div class="ttdoc">AES-ECB block encryption/decryption. </div></div>
<div class="ttc" id="aes_8h_html_afd6a37a98051a30f74418beb908d0ecd"><div class="ttname"><a href="aes_8h.html#afd6a37a98051a30f74418beb908d0ecd">aes_init</a></div><div class="ttdeci">void aes_init(aes_context *ctx)</div><div class="ttdoc">Initialize AES context. </div></div>
<div class="ttc" id="ctr__drbg_8h_html"><div class="ttname"><a href="ctr__drbg_8h.html">ctr_drbg.h</a></div><div class="ttdoc">CTR_DRBG based on AES-256 (NIST SP 800-90) </div></div>
</div><!-- fragment --></div><!-- contents -->
<!-- start footer part -->
<hr class="footer"/><address class="footer"><small>
Generated on Thu Jul 31 2014 11:35:51 for PolarSSL v1.3.8 by  <a href="http://www.doxygen.org/index.html">
<img class="footer" src="doxygen.png" alt="doxygen"/>
</a> 1.8.5
</small></address>
</body>
</html>
