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<div class="title">entropy.c</div> </div>
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<a href="entropy_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"> * Entropy accumulator implementation</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> </div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#if !defined(POLARSSL_CONFIG_FILE)</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</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="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor"></span><span class="preprocessor">#include POLARSSL_CONFIG_FILE</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor"></span><span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#if defined(POLARSSL_ENTROPY_C)</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#include "<a class="code" href="entropy_8h.html">polarssl/entropy.h</a>"</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor">#include "<a class="code" href="entropy__poll_8h.html">polarssl/entropy_poll.h</a>"</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> </div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="preprocessor">#if defined(POLARSSL_FS_IO)</span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="preprocessor"></span><span class="preprocessor">#include <stdio.h></span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="preprocessor">#if defined(POLARSSL_HAVEGE_C)</span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="preprocessor"></span><span class="preprocessor">#include "<a class="code" href="havege_8h.html">polarssl/havege.h</a>"</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="comment">/* Implementation that should never be optimized out by the compiler */</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</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="l00047"></a><span class="lineno"> 47</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="l00048"></a><span class="lineno"> 48</span> }</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> </div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="preprocessor">#define ENTROPY_MAX_LOOP 256 </span></div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="preprocessor">void entropy_init( entropy_context *ctx )</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="preprocessor"></span>{</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  memset( ctx, 0, <span class="keyword">sizeof</span>(<a class="code" href="structentropy__context.html">entropy_context</a>) );</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="preprocessor">#if defined(POLARSSL_THREADING_C)</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="preprocessor"></span> <a class="code" href="threading_8h.html#aa6c63dc2e1bfeab14346ded406410603">polarssl_mutex_init</a>( &ctx->mutex );</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="preprocessor">#if defined(POLARSSL_ENTROPY_SHA512_ACCUMULATOR)</span></div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="preprocessor"></span> <a class="code" href="sha512_8h.html#a6079e154daa986d2e8b0be61c21063ef">sha512_starts</a>( &ctx->accumulator, 0 );</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="preprocessor"></span> <a class="code" href="sha256_8h.html#ae8e12a0ae383d163ed4d5ead3b96c4de">sha256_starts</a>( &ctx->accumulator, 0 );</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="preprocessor"></span><span class="preprocessor">#if defined(POLARSSL_HAVEGE_C)</span></div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="preprocessor"></span> <a class="code" href="havege_8h.html#a86f553a34ca010f502beada3729f202b">havege_init</a>( &ctx->havege_data );</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="preprocessor">#if !defined(POLARSSL_NO_DEFAULT_ENTROPY_SOURCES)</span></div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="preprocessor"></span><span class="preprocessor">#if !defined(POLARSSL_NO_PLATFORM_ENTROPY)</span></div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="preprocessor"></span> <a class="code" href="entropy_8h.html#a5a9c269e560537d59a4730faaa835fd5">entropy_add_source</a>( ctx, <a class="code" href="entropy__poll_8h.html#a44ba03df3585a31c6c8395e3893486d0">platform_entropy_poll</a>, NULL,</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <a class="code" href="entropy__poll_8h.html#ac9a6394d9503c8045054a048b0d7cc0d">ENTROPY_MIN_PLATFORM</a> );</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="preprocessor"></span><span class="preprocessor">#if defined(POLARSSL_TIMING_C)</span></div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="preprocessor"></span> <a class="code" href="entropy_8h.html#a5a9c269e560537d59a4730faaa835fd5">entropy_add_source</a>( ctx, <a class="code" href="entropy__poll_8h.html#a3f46bcbc1d77975860af4690b7af9630">hardclock_poll</a>, NULL, <a class="code" href="entropy__poll_8h.html#a790c9f23655a9bbe05053276e91ad093">ENTROPY_MIN_HARDCLOCK</a> );</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="preprocessor"></span><span class="preprocessor">#if defined(POLARSSL_HAVEGE_C)</span></div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="preprocessor"></span> <a class="code" href="entropy_8h.html#a5a9c269e560537d59a4730faaa835fd5">entropy_add_source</a>( ctx, havege_poll, &ctx->havege_data,</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  <a class="code" href="entropy__poll_8h.html#a99bec0aa7de17714859f1d2c2e547c64">ENTROPY_MIN_HAVEGE</a> );</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="preprocessor"></span><span class="preprocessor">#endif </span><span class="comment">/* POLARSSL_NO_DEFAULT_ENTROPY_SOURCES */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="preprocessor"></span>}</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> </div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="keywordtype">void</span> <a class="code" href="entropy_8h.html#ace26c056043473a7f12be97117262fd4">entropy_free</a>( <a class="code" href="structentropy__context.html">entropy_context</a> *ctx )</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> {</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="preprocessor">#if defined(POLARSSL_HAVEGE_C)</span></div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="preprocessor"></span> <a class="code" href="havege_8h.html#af7432cd400b6f89ec3b4b14e9b0fe4f9">havege_free</a>( &ctx->havege_data );</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="preprocessor"></span> polarssl_zeroize( ctx, <span class="keyword">sizeof</span>( <a class="code" href="structentropy__context.html">entropy_context</a> ) );</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="preprocessor">#if defined(POLARSSL_THREADING_C)</span></div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="preprocessor"></span> <a class="code" href="threading_8h.html#aaf60b0265d71e36e1429c513e2890a0f">polarssl_mutex_free</a>( &ctx->mutex );</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="preprocessor"></span>}</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span> </div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="keywordtype">int</span> <a class="code" href="entropy_8h.html#a5a9c269e560537d59a4730faaa835fd5">entropy_add_source</a>( <a class="code" href="structentropy__context.html">entropy_context</a> *ctx,</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <a class="code" href="entropy_8h.html#a4267ff128fbe2ca4da2584359821d09d">f_source_ptr</a> f_source, <span class="keywordtype">void</span> *p_source,</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="keywordtype">size_t</span> threshold )</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="keywordtype">int</span> index, ret = 0;</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span> </div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="preprocessor">#if defined(POLARSSL_THREADING_C)</span></div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="preprocessor"></span> <span class="keywordflow">if</span>( ( ret = <a class="code" href="threading_8h.html#a20d968ec5d48ea16cfab980204e3cb90">polarssl_mutex_lock</a>( &ctx->mutex ) ) != 0 )</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="keywordflow">return</span>( ret );</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  index = ctx-><a class="code" href="structentropy__context.html#a7af60cf36a02db4971577d1da52040bb">source_count</a>;</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <span class="keywordflow">if</span>( index >= <a class="code" href="config-ccm-psk-tls1__2_8h.html#a5e9ba2c083acc78efc758deca62d162d">ENTROPY_MAX_SOURCES</a> )</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  {</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  ret = <a class="code" href="entropy_8h.html#a91eeab75dbfc3730efdc415f57e9f4ac">POLARSSL_ERR_ENTROPY_MAX_SOURCES</a>;</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="keywordflow">goto</span> exit;</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> </div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  ctx-><a class="code" href="structentropy__context.html#a386078ac574665c242900d1215dc900b">source</a>[index].<a class="code" href="structsource__state.html#a1ce2b87d8ba2a9df5e75705eeee155a2">f_source</a> = f_source;</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  ctx-><a class="code" href="structentropy__context.html#a386078ac574665c242900d1215dc900b">source</a>[index].<a class="code" href="structsource__state.html#a2dbfe60df6a2808b1347990651287758">p_source</a> = p_source;</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  ctx-><a class="code" href="structentropy__context.html#a386078ac574665c242900d1215dc900b">source</a>[index].<a class="code" href="structsource__state.html#a58050b25725620cafe76c9c1d2b0ecf1">threshold</a> = threshold;</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>  ctx-><a class="code" href="structentropy__context.html#a7af60cf36a02db4971577d1da52040bb">source_count</a>++;</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> exit:</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span> <span class="preprocessor">#if defined(POLARSSL_THREADING_C)</span></div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span> <span class="preprocessor"></span> <span class="keywordflow">if</span>( <a class="code" href="threading_8h.html#a3f71f2d457fdf4f03268eb731abf3a98">polarssl_mutex_unlock</a>( &ctx->mutex ) != 0 )</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="keywordflow">return</span>( <a class="code" href="threading_8h.html#afea02eb560c790911a89035bbcc909ad">POLARSSL_ERR_THREADING_MUTEX_ERROR</a> );</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <span class="keywordflow">return</span>( ret );</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> </div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span> <span class="comment"> * Entropy accumulator update</span></div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span> <span class="keyword">static</span> <span class="keywordtype">int</span> entropy_update( <a class="code" href="structentropy__context.html">entropy_context</a> *ctx, <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> source_id,</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *data, <span class="keywordtype">size_t</span> len )</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span> {</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> header[2];</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> tmp[<a class="code" href="entropy_8h.html#a4610ce6582323b8906b9e05ae6253dfb">ENTROPY_BLOCK_SIZE</a>];</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <span class="keywordtype">size_t</span> use_len = len;</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *p = data;</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span> </div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <span class="keywordflow">if</span>( use_len > <a class="code" href="entropy_8h.html#a4610ce6582323b8906b9e05ae6253dfb">ENTROPY_BLOCK_SIZE</a> )</div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  {</div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span> <span class="preprocessor">#if defined(POLARSSL_ENTROPY_SHA512_ACCUMULATOR)</span></div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span> <span class="preprocessor"></span> <a class="code" href="sha512_8h.html#a84e277fd84a8cbacceabcd0909610681">sha512</a>( data, len, tmp, 0 );</div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span> <span class="preprocessor"></span> <a class="code" href="sha256_8h.html#a67457fa83af0439e80538d99426eb39a">sha256</a>( data, len, tmp, 0 );</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span> <span class="preprocessor"></span> p = tmp;</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  use_len = <a class="code" href="entropy_8h.html#a4610ce6582323b8906b9e05ae6253dfb">ENTROPY_BLOCK_SIZE</a>;</div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  }</div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span> </div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  header[0] = source_id;</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  header[1] = use_len & 0xFF;</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span> </div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span> <span class="preprocessor">#if defined(POLARSSL_ENTROPY_SHA512_ACCUMULATOR)</span></div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span> <span class="preprocessor"></span> <a class="code" href="sha512_8h.html#afaa574d01d7d92bbd637a9a2b30ab1ad">sha512_update</a>( &ctx-><a class="code" href="structentropy__context.html#aefbbd08781221ef60ca9c901398e008f">accumulator</a>, header, 2 );</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <a class="code" href="sha512_8h.html#afaa574d01d7d92bbd637a9a2b30ab1ad">sha512_update</a>( &ctx-><a class="code" href="structentropy__context.html#aefbbd08781221ef60ca9c901398e008f">accumulator</a>, p, use_len );</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span> <span class="preprocessor"></span> <a class="code" href="sha256_8h.html#ad6a332874701f3170d35dc42dec89428">sha256_update</a>( &ctx-><a class="code" href="structentropy__context.html#aefbbd08781221ef60ca9c901398e008f">accumulator</a>, header, 2 );</div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <a class="code" href="sha256_8h.html#ad6a332874701f3170d35dc42dec89428">sha256_update</a>( &ctx-><a class="code" href="structentropy__context.html#aefbbd08781221ef60ca9c901398e008f">accumulator</a>, p, use_len );</div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <span class="keywordflow">return</span>( 0 );</div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span> }</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span> </div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span> <span class="keywordtype">int</span> <a class="code" href="entropy_8h.html#a474ff02ff7707ebffd00672d8e46ddf3">entropy_update_manual</a>( <a class="code" href="structentropy__context.html">entropy_context</a> *ctx,</div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *data, <span class="keywordtype">size_t</span> len )</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="keywordtype">int</span> ret;</div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span> </div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span> <span class="preprocessor">#if defined(POLARSSL_THREADING_C)</span></div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span> <span class="preprocessor"></span> <span class="keywordflow">if</span>( ( ret = <a class="code" href="threading_8h.html#a20d968ec5d48ea16cfab980204e3cb90">polarssl_mutex_lock</a>( &ctx->mutex ) ) != 0 )</div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  <span class="keywordflow">return</span>( ret );</div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  ret = entropy_update( ctx, <a class="code" href="entropy_8h.html#a8c3a8b8e81c2b4e3c03d3704029bca39">ENTROPY_SOURCE_MANUAL</a>, data, 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="preprocessor">#if defined(POLARSSL_THREADING_C)</span></div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span> <span class="preprocessor"></span> <span class="keywordflow">if</span>( <a class="code" href="threading_8h.html#a3f71f2d457fdf4f03268eb731abf3a98">polarssl_mutex_unlock</a>( &ctx->mutex ) != 0 )</div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  <span class="keywordflow">return</span>( <a class="code" href="threading_8h.html#afea02eb560c790911a89035bbcc909ad">POLARSSL_ERR_THREADING_MUTEX_ERROR</a> );</div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  <span class="keywordflow">return</span>( ret );</div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span> }</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> <span class="comment">/*</span></div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span> <span class="comment"> * Run through the different sources to add entropy to our accumulator</span></div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span> <span class="keyword">static</span> <span class="keywordtype">int</span> entropy_gather_internal( <a class="code" href="structentropy__context.html">entropy_context</a> *ctx )</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="keywordtype">int</span> ret, i;</div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> buf[<a class="code" href="entropy_8h.html#acc7f201066c056a514433c5a6224b720">ENTROPY_MAX_GATHER</a>];</div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  <span class="keywordtype">size_t</span> olen;</div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span> </div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  <span class="keywordflow">if</span>( ctx-><a class="code" href="structentropy__context.html#a7af60cf36a02db4971577d1da52040bb">source_count</a> == 0 )</div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  <span class="keywordflow">return</span>( <a class="code" href="entropy_8h.html#a0b3765116f6d9d1cbdd5d2c4faee5d33">POLARSSL_ERR_ENTROPY_NO_SOURCES_DEFINED</a> );</div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span> </div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span> <span class="comment"> * Run through our entropy sources</span></div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  <span class="keywordflow">for</span>( i = 0; i < ctx-><a class="code" href="structentropy__context.html#a7af60cf36a02db4971577d1da52040bb">source_count</a>; i++ )</div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  {</div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  olen = 0;</div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  <span class="keywordflow">if</span>( ( ret = ctx-><a class="code" href="structentropy__context.html#a386078ac574665c242900d1215dc900b">source</a>[i].<a class="code" href="structsource__state.html#a1ce2b87d8ba2a9df5e75705eeee155a2">f_source</a>( ctx-><a class="code" href="structentropy__context.html#a386078ac574665c242900d1215dc900b">source</a>[i].<a class="code" href="structsource__state.html#a2dbfe60df6a2808b1347990651287758">p_source</a>,</div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  buf, <a class="code" href="entropy_8h.html#acc7f201066c056a514433c5a6224b720">ENTROPY_MAX_GATHER</a>, &olen ) ) != 0 )</div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  {</div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  <span class="keywordflow">return</span>( ret );</div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  }</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>  <span class="comment">/*</span></div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span> <span class="comment"> * Add if we actually gathered something</span></div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <span class="keywordflow">if</span>( olen > 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>  entropy_update( ctx, (<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span>) i, buf, olen );</div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  ctx-><a class="code" href="structentropy__context.html#a386078ac574665c242900d1215dc900b">source</a>[i].<a class="code" href="structsource__state.html#a645e64c552b6515b0c65685321189d24">size</a> += olen;</div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  }</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> </div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  <span class="keywordflow">return</span>( 0 );</div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span> }</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> <span class="comment">/*</span></div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span> <span class="comment"> * Thread-safe wrapper for entropy_gather_internal()</span></div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span> <span class="keywordtype">int</span> <a class="code" href="entropy_8h.html#abe16e67991416febc3144c0c8888e792">entropy_gather</a>( <a class="code" href="structentropy__context.html">entropy_context</a> *ctx )</div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span> {</div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  <span class="keywordtype">int</span> ret;</div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span> </div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span> <span class="preprocessor">#if defined(POLARSSL_THREADING_C)</span></div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span> <span class="preprocessor"></span> <span class="keywordflow">if</span>( ( ret = <a class="code" href="threading_8h.html#a20d968ec5d48ea16cfab980204e3cb90">polarssl_mutex_lock</a>( &ctx->mutex ) ) != 0 )</div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  <span class="keywordflow">return</span>( ret );</div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  ret = entropy_gather_internal( ctx );</div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span> </div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span> <span class="preprocessor">#if defined(POLARSSL_THREADING_C)</span></div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span> <span class="preprocessor"></span> <span class="keywordflow">if</span>( <a class="code" href="threading_8h.html#a3f71f2d457fdf4f03268eb731abf3a98">polarssl_mutex_unlock</a>( &ctx->mutex ) != 0 )</div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  <span class="keywordflow">return</span>( <a class="code" href="threading_8h.html#afea02eb560c790911a89035bbcc909ad">POLARSSL_ERR_THREADING_MUTEX_ERROR</a> );</div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  <span class="keywordflow">return</span>( ret );</div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span> }</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="keywordtype">int</span> <a class="code" href="entropy_8h.html#a2b7d7123b31b42902364989975740fe2">entropy_func</a>( <span class="keywordtype">void</span> *data, <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *output, <span class="keywordtype">size_t</span> len )</div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span> {</div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  <span class="keywordtype">int</span> ret, count = 0, i, reached;</div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  <a class="code" href="structentropy__context.html">entropy_context</a> *ctx = (<a class="code" href="structentropy__context.html">entropy_context</a> *) data;</div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> buf[<a class="code" href="entropy_8h.html#a4610ce6582323b8906b9e05ae6253dfb">ENTROPY_BLOCK_SIZE</a>];</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">if</span>( len > <a class="code" href="entropy_8h.html#a4610ce6582323b8906b9e05ae6253dfb">ENTROPY_BLOCK_SIZE</a> )</div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  <span class="keywordflow">return</span>( <a class="code" href="entropy_8h.html#ab9ff2b3b04c80aa19556ed9676bf35e2">POLARSSL_ERR_ENTROPY_SOURCE_FAILED</a> );</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="preprocessor">#if defined(POLARSSL_THREADING_C)</span></div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span> <span class="preprocessor"></span> <span class="keywordflow">if</span>( ( ret = <a class="code" href="threading_8h.html#a20d968ec5d48ea16cfab980204e3cb90">polarssl_mutex_lock</a>( &ctx->mutex ) ) != 0 )</div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  <span class="keywordflow">return</span>( ret );</div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span> <span class="comment"> * Always gather extra entropy before a call</span></div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  <span class="keywordflow">do</span></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>  <span class="keywordflow">if</span>( count++ > ENTROPY_MAX_LOOP )</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>  ret = <a class="code" href="entropy_8h.html#ab9ff2b3b04c80aa19556ed9676bf35e2">POLARSSL_ERR_ENTROPY_SOURCE_FAILED</a>;</div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  <span class="keywordflow">goto</span> exit;</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> </div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  <span class="keywordflow">if</span>( ( ret = entropy_gather_internal( ctx ) ) != 0 )</div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  <span class="keywordflow">goto</span> exit;</div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span> </div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  reached = 0;</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>  <span class="keywordflow">for</span>( i = 0; i < ctx-><a class="code" href="structentropy__context.html#a7af60cf36a02db4971577d1da52040bb">source_count</a>; i++ )</div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  <span class="keywordflow">if</span>( ctx-><a class="code" href="structentropy__context.html#a386078ac574665c242900d1215dc900b">source</a>[i].<a class="code" href="structsource__state.html#a645e64c552b6515b0c65685321189d24">size</a> >= ctx-><a class="code" href="structentropy__context.html#a386078ac574665c242900d1215dc900b">source</a>[i].<a class="code" href="structsource__state.html#a58050b25725620cafe76c9c1d2b0ecf1">threshold</a> )</div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  reached++;</div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  }</div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  <span class="keywordflow">while</span>( reached != ctx-><a class="code" href="structentropy__context.html#a7af60cf36a02db4971577d1da52040bb">source_count</a> );</div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span> </div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  memset( buf, 0, <a class="code" href="entropy_8h.html#a4610ce6582323b8906b9e05ae6253dfb">ENTROPY_BLOCK_SIZE</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="preprocessor">#if defined(POLARSSL_ENTROPY_SHA512_ACCUMULATOR)</span></div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span> <span class="preprocessor"></span> <a class="code" href="sha512_8h.html#abbbcba6e6c1a9c6b098be20418d81305">sha512_finish</a>( &ctx-><a class="code" href="structentropy__context.html#aefbbd08781221ef60ca9c901398e008f">accumulator</a>, buf );</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>  <span class="comment">/*</span></div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span> <span class="comment"> * Reset accumulator and counters and recycle existing entropy</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>  memset( &ctx-><a class="code" href="structentropy__context.html#aefbbd08781221ef60ca9c901398e008f">accumulator</a>, 0, <span class="keyword">sizeof</span>( <a class="code" href="structsha512__context.html">sha512_context</a> ) );</div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  <a class="code" href="sha512_8h.html#a6079e154daa986d2e8b0be61c21063ef">sha512_starts</a>( &ctx-><a class="code" href="structentropy__context.html#aefbbd08781221ef60ca9c901398e008f">accumulator</a>, 0 );</div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  <a class="code" href="sha512_8h.html#afaa574d01d7d92bbd637a9a2b30ab1ad">sha512_update</a>( &ctx-><a class="code" href="structentropy__context.html#aefbbd08781221ef60ca9c901398e008f">accumulator</a>, buf, <a class="code" href="entropy_8h.html#a4610ce6582323b8906b9e05ae6253dfb">ENTROPY_BLOCK_SIZE</a> );</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>  <span class="comment">/*</span></div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span> <span class="comment"> * Perform second SHA-512 on entropy</span></div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  <a class="code" href="sha512_8h.html#a84e277fd84a8cbacceabcd0909610681">sha512</a>( buf, <a class="code" href="entropy_8h.html#a4610ce6582323b8906b9e05ae6253dfb">ENTROPY_BLOCK_SIZE</a>, buf, 0 );</div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span> <span class="preprocessor">#else </span><span class="comment">/* POLARSSL_ENTROPY_SHA512_ACCUMULATOR */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span> <span class="preprocessor"></span> <a class="code" href="sha256_8h.html#a2336e05cf0778065a128557c3e69fe53">sha256_finish</a>( &ctx-><a class="code" href="structentropy__context.html#aefbbd08781221ef60ca9c901398e008f">accumulator</a>, buf );</div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span> </div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span> <span class="comment"> * Reset accumulator and counters and recycle existing entropy</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>  memset( &ctx-><a class="code" href="structentropy__context.html#aefbbd08781221ef60ca9c901398e008f">accumulator</a>, 0, <span class="keyword">sizeof</span>( <a class="code" href="structsha256__context.html">sha256_context</a> ) );</div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  <a class="code" href="sha256_8h.html#ae8e12a0ae383d163ed4d5ead3b96c4de">sha256_starts</a>( &ctx-><a class="code" href="structentropy__context.html#aefbbd08781221ef60ca9c901398e008f">accumulator</a>, 0 );</div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  <a class="code" href="sha256_8h.html#ad6a332874701f3170d35dc42dec89428">sha256_update</a>( &ctx-><a class="code" href="structentropy__context.html#aefbbd08781221ef60ca9c901398e008f">accumulator</a>, buf, <a class="code" href="entropy_8h.html#a4610ce6582323b8906b9e05ae6253dfb">ENTROPY_BLOCK_SIZE</a> );</div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span> </div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span> <span class="comment"> * Perform second SHA-256 on entropy</span></div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  <a class="code" href="sha256_8h.html#a67457fa83af0439e80538d99426eb39a">sha256</a>( buf, <a class="code" href="entropy_8h.html#a4610ce6582323b8906b9e05ae6253dfb">ENTROPY_BLOCK_SIZE</a>, buf, 0 );</div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span> <span class="preprocessor">#endif </span><span class="comment">/* POLARSSL_ENTROPY_SHA512_ACCUMULATOR */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  <span class="keywordflow">for</span>( i = 0; i < ctx-><a class="code" href="structentropy__context.html#a7af60cf36a02db4971577d1da52040bb">source_count</a>; i++ )</div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  ctx-><a class="code" href="structentropy__context.html#a386078ac574665c242900d1215dc900b">source</a>[i].<a class="code" href="structsource__state.html#a645e64c552b6515b0c65685321189d24">size</a> = 0;</div>
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span> </div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  memcpy( output, buf, len );</div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span> </div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  ret = 0;</div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span> </div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span> exit:</div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span> <span class="preprocessor">#if defined(POLARSSL_THREADING_C)</span></div>
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span> <span class="preprocessor"></span> <span class="keywordflow">if</span>( <a class="code" href="threading_8h.html#a3f71f2d457fdf4f03268eb731abf3a98">polarssl_mutex_unlock</a>( &ctx->mutex ) != 0 )</div>
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  <span class="keywordflow">return</span>( <a class="code" href="threading_8h.html#afea02eb560c790911a89035bbcc909ad">POLARSSL_ERR_THREADING_MUTEX_ERROR</a> );</div>
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  <span class="keywordflow">return</span>( ret );</div>
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span> }</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> <span class="preprocessor">#if defined(POLARSSL_FS_IO)</span></div>
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span> <span class="preprocessor"></span><span class="keywordtype">int</span> <a class="code" href="entropy_8h.html#aeec06418558ccfd52a9967ad54f197c4">entropy_write_seed_file</a>( <a class="code" href="structentropy__context.html">entropy_context</a> *ctx, <span class="keyword">const</span> <span class="keywordtype">char</span> *path )</div>
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span> {</div>
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  <span class="keywordtype">int</span> ret = <a class="code" href="entropy_8h.html#a348fa499b6e890de696df6b23d9cce39">POLARSSL_ERR_ENTROPY_FILE_IO_ERROR</a>;</div>
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  FILE *f;</div>
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> buf[<a class="code" href="entropy_8h.html#a4610ce6582323b8906b9e05ae6253dfb">ENTROPY_BLOCK_SIZE</a>];</div>
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span> </div>
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  <span class="keywordflow">if</span>( ( f = fopen( path, <span class="stringliteral">"wb"</span> ) ) == NULL )</div>
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  <span class="keywordflow">return</span>( <a class="code" href="entropy_8h.html#a348fa499b6e890de696df6b23d9cce39">POLARSSL_ERR_ENTROPY_FILE_IO_ERROR</a> );</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>  <span class="keywordflow">if</span>( ( ret = <a class="code" href="entropy_8h.html#a2b7d7123b31b42902364989975740fe2">entropy_func</a>( ctx, buf, <a class="code" href="entropy_8h.html#a4610ce6582323b8906b9e05ae6253dfb">ENTROPY_BLOCK_SIZE</a> ) ) != 0 )</div>
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  <span class="keywordflow">goto</span> exit;</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>  <span class="keywordflow">if</span>( fwrite( buf, 1, <a class="code" href="entropy_8h.html#a4610ce6582323b8906b9e05ae6253dfb">ENTROPY_BLOCK_SIZE</a>, f ) != <a class="code" href="entropy_8h.html#a4610ce6582323b8906b9e05ae6253dfb">ENTROPY_BLOCK_SIZE</a> )</div>
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  {</div>
<div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  ret = <a class="code" href="entropy_8h.html#a348fa499b6e890de696df6b23d9cce39">POLARSSL_ERR_ENTROPY_FILE_IO_ERROR</a>;</div>
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span>  <span class="keywordflow">goto</span> exit;</div>
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  }</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>  ret = 0;</div>
<div class="line"><a name="l00347"></a><span class="lineno"> 347</span> </div>
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span> exit:</div>
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  fclose( f );</div>
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span>  <span class="keywordflow">return</span>( ret );</div>
<div class="line"><a name="l00351"></a><span class="lineno"> 351</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="keywordtype">int</span> <a class="code" href="entropy_8h.html#a5d16f198ece9ccdfe5f80780bf5cee33">entropy_update_seed_file</a>( <a class="code" href="structentropy__context.html">entropy_context</a> *ctx, <span class="keyword">const</span> <span class="keywordtype">char</span> *path )</div>
<div class="line"><a name="l00354"></a><span class="lineno"> 354</span> {</div>
<div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  FILE *f;</div>
<div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  <span class="keywordtype">size_t</span> n;</div>
<div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> buf[ <a class="code" href="entropy_8h.html#a23cd05df3838590ba3b1688290c9c1fa">ENTROPY_MAX_SEED_SIZE</a> ];</div>
<div class="line"><a name="l00358"></a><span class="lineno"> 358</span> </div>
<div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  <span class="keywordflow">if</span>( ( f = fopen( path, <span class="stringliteral">"rb"</span> ) ) == NULL )</div>
<div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  <span class="keywordflow">return</span>( <a class="code" href="entropy_8h.html#a348fa499b6e890de696df6b23d9cce39">POLARSSL_ERR_ENTROPY_FILE_IO_ERROR</a> );</div>
<div class="line"><a name="l00361"></a><span class="lineno"> 361</span> </div>
<div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  fseek( f, 0, SEEK_END );</div>
<div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  n = (size_t) ftell( f );</div>
<div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  fseek( f, 0, SEEK_SET );</div>
<div class="line"><a name="l00365"></a><span class="lineno"> 365</span> </div>
<div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  <span class="keywordflow">if</span>( n > <a class="code" href="entropy_8h.html#a23cd05df3838590ba3b1688290c9c1fa">ENTROPY_MAX_SEED_SIZE</a> )</div>
<div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  n = <a class="code" href="entropy_8h.html#a23cd05df3838590ba3b1688290c9c1fa">ENTROPY_MAX_SEED_SIZE</a>;</div>
<div class="line"><a name="l00368"></a><span class="lineno"> 368</span> </div>
<div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  <span class="keywordflow">if</span>( fread( buf, 1, n, f ) != n )</div>
<div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  {</div>
<div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  fclose( f );</div>
<div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  <span class="keywordflow">return</span>( <a class="code" href="entropy_8h.html#a348fa499b6e890de696df6b23d9cce39">POLARSSL_ERR_ENTROPY_FILE_IO_ERROR</a> );</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>  fclose( f );</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>  <a class="code" href="entropy_8h.html#a474ff02ff7707ebffd00672d8e46ddf3">entropy_update_manual</a>( ctx, buf, n );</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>  <span class="keywordflow">return</span>( <a class="code" href="entropy_8h.html#aeec06418558ccfd52a9967ad54f197c4">entropy_write_seed_file</a>( ctx, path ) );</div>
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span> }</div>
<div class="line"><a name="l00381"></a><span class="lineno"> 381</span> <span class="preprocessor">#endif </span><span class="comment">/* POLARSSL_FS_IO */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00382"></a><span class="lineno"> 382</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00383"></a><span class="lineno"> 383</span> <span class="preprocessor">#if defined(POLARSSL_SELF_TEST)</span></div>
<div class="line"><a name="l00384"></a><span class="lineno"> 384</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00385"></a><span class="lineno"> 385</span> <span class="preprocessor">#if defined(POLARSSL_PLATFORM_C)</span></div>
<div class="line"><a name="l00386"></a><span class="lineno"> 386</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="l00387"></a><span class="lineno"> 387</span> <span class="preprocessor">#else</span></div>
<div class="line"><a name="l00388"></a><span class="lineno"> 388</span> <span class="preprocessor"></span><span class="preprocessor">#include <stdio.h></span></div>
<div class="line"><a name="l00389"></a><span class="lineno"> 389</span> <span class="preprocessor">#define polarssl_printf printf</span></div>
<div class="line"><a name="l00390"></a><span class="lineno"> 390</span> <span class="preprocessor"></span><span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00391"></a><span class="lineno"> 391</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00392"></a><span class="lineno"> 392</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00393"></a><span class="lineno"> 393</span> <span class="comment"> * Dummy source function</span></div>
<div class="line"><a name="l00394"></a><span class="lineno"> 394</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00395"></a><span class="lineno"> 395</span> <span class="keyword">static</span> <span class="keywordtype">int</span> entropy_dummy_source( <span class="keywordtype">void</span> *data, <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *output,</div>
<div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  <span class="keywordtype">size_t</span> len, <span class="keywordtype">size_t</span> *olen )</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>  ((void) data);</div>
<div class="line"><a name="l00399"></a><span class="lineno"> 399</span> </div>
<div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  memset( output, 0x2a, len );</div>
<div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  *olen = len;</div>
<div class="line"><a name="l00402"></a><span class="lineno"> 402</span> </div>
<div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  <span class="keywordflow">return</span>( 0 );</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="comment">/*</span></div>
<div class="line"><a name="l00407"></a><span class="lineno"> 407</span> <span class="comment"> * The actual entropy quality is hard to test, but we can at least</span></div>
<div class="line"><a name="l00408"></a><span class="lineno"> 408</span> <span class="comment"> * test that the functions don't cause errors and write the correct</span></div>
<div class="line"><a name="l00409"></a><span class="lineno"> 409</span> <span class="comment"> * amount of data to buffers.</span></div>
<div class="line"><a name="l00410"></a><span class="lineno"> 410</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00411"></a><span class="lineno"> 411</span> <span class="keywordtype">int</span> <a class="code" href="entropy_8h.html#aee40647ce61215ca2765e9ab3c84a47c">entropy_self_test</a>( <span class="keywordtype">int</span> verbose )</div>
<div class="line"><a name="l00412"></a><span class="lineno"> 412</span> {</div>
<div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  <span class="keywordtype">int</span> ret = 0;</div>
<div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  <a class="code" href="structentropy__context.html">entropy_context</a> ctx;</div>
<div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> buf[<a class="code" href="entropy_8h.html#a4610ce6582323b8906b9e05ae6253dfb">ENTROPY_BLOCK_SIZE</a>] = { 0 };</div>
<div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> acc[<a class="code" href="entropy_8h.html#a4610ce6582323b8906b9e05ae6253dfb">ENTROPY_BLOCK_SIZE</a>] = { 0 };</div>
<div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  <span class="keywordtype">size_t</span> i, j;</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>( verbose != 0 )</div>
<div class="line"><a name="l00420"></a><span class="lineno"> 420</span>  <a class="code" href="test__suite__aes_8cbc_8c.html#afc6a7362c0f0c9cfa8fc76b3281e2b37">polarssl_printf</a>( <span class="stringliteral">" ENTROPY test: "</span> );</div>
<div class="line"><a name="l00421"></a><span class="lineno"> 421</span> </div>
<div class="line"><a name="l00422"></a><span class="lineno"> 422</span>  <a class="code" href="entropy_8h.html#a07cc14e42768b04bbcc48a632ad8c442">entropy_init</a>( &ctx );</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>  ret = <a class="code" href="entropy_8h.html#a5a9c269e560537d59a4730faaa835fd5">entropy_add_source</a>( &ctx, entropy_dummy_source, NULL, 16 );</div>
<div class="line"><a name="l00425"></a><span class="lineno"> 425</span>  <span class="keywordflow">if</span>( ret != 0 )</div>
<div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  <span class="keywordflow">goto</span> cleanup;</div>
<div class="line"><a name="l00427"></a><span class="lineno"> 427</span> </div>
<div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  <span class="keywordflow">if</span>( ( ret = <a class="code" href="entropy_8h.html#abe16e67991416febc3144c0c8888e792">entropy_gather</a>( &ctx ) ) != 0 )</div>
<div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  <span class="keywordflow">goto</span> cleanup;</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>  <span class="keywordflow">if</span>( ( ret = <a class="code" href="entropy_8h.html#a474ff02ff7707ebffd00672d8e46ddf3">entropy_update_manual</a>( &ctx, buf, <span class="keyword">sizeof</span> buf ) ) != 0 )</div>
<div class="line"><a name="l00432"></a><span class="lineno"> 432</span>  <span class="keywordflow">goto</span> cleanup;</div>
<div class="line"><a name="l00433"></a><span class="lineno"> 433</span> </div>
<div class="line"><a name="l00434"></a><span class="lineno"> 434</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00435"></a><span class="lineno"> 435</span> <span class="comment"> * To test that entropy_func writes correct number of bytes:</span></div>
<div class="line"><a name="l00436"></a><span class="lineno"> 436</span> <span class="comment"> * - use the whole buffer and rely on ASan to detect overruns</span></div>
<div class="line"><a name="l00437"></a><span class="lineno"> 437</span> <span class="comment"> * - collect entropy 8 times and OR the result in an accumulator:</span></div>
<div class="line"><a name="l00438"></a><span class="lineno"> 438</span> <span class="comment"> * any byte should then be 0 with probably 2^(-64), so requiring</span></div>
<div class="line"><a name="l00439"></a><span class="lineno"> 439</span> <span class="comment"> * each of the 32 or 64 bytes to be non-zero has a false failure rate</span></div>
<div class="line"><a name="l00440"></a><span class="lineno"> 440</span> <span class="comment"> * of at most 2^(-58) which is acceptable.</span></div>
<div class="line"><a name="l00441"></a><span class="lineno"> 441</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00442"></a><span class="lineno"> 442</span>  <span class="keywordflow">for</span>( i = 0; i < 8; i++ )</div>
<div class="line"><a name="l00443"></a><span class="lineno"> 443</span>  {</div>
<div class="line"><a name="l00444"></a><span class="lineno"> 444</span>  <span class="keywordflow">if</span>( ( ret = <a class="code" href="entropy_8h.html#a2b7d7123b31b42902364989975740fe2">entropy_func</a>( &ctx, buf, <span class="keyword">sizeof</span>( buf ) ) ) != 0 )</div>
<div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  <span class="keywordflow">goto</span> cleanup;</div>
<div class="line"><a name="l00446"></a><span class="lineno"> 446</span> </div>
<div class="line"><a name="l00447"></a><span class="lineno"> 447</span>  <span class="keywordflow">for</span>( j = 0; j < <span class="keyword">sizeof</span>( buf ); j++ )</div>
<div class="line"><a name="l00448"></a><span class="lineno"> 448</span>  acc[j] |= buf[j];</div>
<div class="line"><a name="l00449"></a><span class="lineno"> 449</span>  }</div>
<div class="line"><a name="l00450"></a><span class="lineno"> 450</span> </div>
<div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  <span class="keywordflow">for</span>( j = 0; j < <span class="keyword">sizeof</span>( buf ); j++ )</div>
<div class="line"><a name="l00452"></a><span class="lineno"> 452</span>  {</div>
<div class="line"><a name="l00453"></a><span class="lineno"> 453</span>  <span class="keywordflow">if</span>( acc[j] == 0 )</div>
<div class="line"><a name="l00454"></a><span class="lineno"> 454</span>  {</div>
<div class="line"><a name="l00455"></a><span class="lineno"> 455</span>  ret = 1;</div>
<div class="line"><a name="l00456"></a><span class="lineno"> 456</span>  <span class="keywordflow">goto</span> cleanup;</div>
<div class="line"><a name="l00457"></a><span class="lineno"> 457</span>  }</div>
<div class="line"><a name="l00458"></a><span class="lineno"> 458</span>  }</div>
<div class="line"><a name="l00459"></a><span class="lineno"> 459</span> </div>
<div class="line"><a name="l00460"></a><span class="lineno"> 460</span> cleanup:</div>
<div class="line"><a name="l00461"></a><span class="lineno"> 461</span>  <a class="code" href="entropy_8h.html#ace26c056043473a7f12be97117262fd4">entropy_free</a>( &ctx );</div>
<div class="line"><a name="l00462"></a><span class="lineno"> 462</span> </div>
<div class="line"><a name="l00463"></a><span class="lineno"> 463</span>  <span class="keywordflow">if</span>( verbose != 0 )</div>
<div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  {</div>
<div class="line"><a name="l00465"></a><span class="lineno"> 465</span>  <span class="keywordflow">if</span>( ret != 0 )</div>
<div class="line"><a name="l00466"></a><span class="lineno"> 466</span>  <a class="code" href="test__suite__aes_8cbc_8c.html#afc6a7362c0f0c9cfa8fc76b3281e2b37">polarssl_printf</a>( <span class="stringliteral">"failed\n"</span> );</div>
<div class="line"><a name="l00467"></a><span class="lineno"> 467</span>  <span class="keywordflow">else</span></div>
<div class="line"><a name="l00468"></a><span class="lineno"> 468</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="l00469"></a><span class="lineno"> 469</span> </div>
<div class="line"><a name="l00470"></a><span class="lineno"> 470</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="l00471"></a><span class="lineno"> 471</span>  }</div>
<div class="line"><a name="l00472"></a><span class="lineno"> 472</span> </div>
<div class="line"><a name="l00473"></a><span class="lineno"> 473</span>  <span class="keywordflow">return</span>( ret != 0 );</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="preprocessor">#endif </span><span class="comment">/* POLARSSL_SELF_TEST */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00476"></a><span class="lineno"> 476</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00477"></a><span class="lineno"> 477</span> <span class="preprocessor">#endif </span><span class="comment">/* POLARSSL_ENTROPY_C */</span><span class="preprocessor"></span></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="threading_8h_html_a20d968ec5d48ea16cfab980204e3cb90"><div class="ttname"><a href="threading_8h.html#a20d968ec5d48ea16cfab980204e3cb90">polarssl_mutex_lock</a></div><div class="ttdeci">int(* polarssl_mutex_lock)(threading_mutex_t *mutex)</div></div>
<div class="ttc" id="entropy_8h_html_a5a9c269e560537d59a4730faaa835fd5"><div class="ttname"><a href="entropy_8h.html#a5a9c269e560537d59a4730faaa835fd5">entropy_add_source</a></div><div class="ttdeci">int entropy_add_source(entropy_context *ctx, f_source_ptr f_source, void *p_source, size_t threshold)</div><div class="ttdoc">Adds an entropy source to poll (Thread-safe if POLARSSL_THREADING_C is enabled) </div></div>
<div class="ttc" id="sha256_8h_html_ad6a332874701f3170d35dc42dec89428"><div class="ttname"><a href="sha256_8h.html#ad6a332874701f3170d35dc42dec89428">sha256_update</a></div><div class="ttdeci">void sha256_update(sha256_context *ctx, const unsigned char *input, size_t ilen)</div><div class="ttdoc">SHA-256 process buffer. </div></div>
<div class="ttc" id="sha256_8h_html_a67457fa83af0439e80538d99426eb39a"><div class="ttname"><a href="sha256_8h.html#a67457fa83af0439e80538d99426eb39a">sha256</a></div><div class="ttdeci">void sha256(const unsigned char *input, size_t ilen, unsigned char output[32], int is224)</div><div class="ttdoc">Output = SHA-256( input buffer ) </div></div>
<div class="ttc" id="entropy__poll_8h_html_ac9a6394d9503c8045054a048b0d7cc0d"><div class="ttname"><a href="entropy__poll_8h.html#ac9a6394d9503c8045054a048b0d7cc0d">ENTROPY_MIN_PLATFORM</a></div><div class="ttdeci">#define ENTROPY_MIN_PLATFORM</div><div class="ttdoc">Minimum for platform source. </div><div class="ttdef"><b>Definition:</b> <a href="entropy__poll_8h_source.html#l00045">entropy_poll.h:45</a></div></div>
<div class="ttc" id="entropy_8h_html_a474ff02ff7707ebffd00672d8e46ddf3"><div class="ttname"><a href="entropy_8h.html#a474ff02ff7707ebffd00672d8e46ddf3">entropy_update_manual</a></div><div class="ttdeci">int entropy_update_manual(entropy_context *ctx, const unsigned char *data, size_t len)</div><div class="ttdoc">Add data to the accumulator manually (Thread-safe if POLARSSL_THREADING_C is enabled) ...</div></div>
<div class="ttc" id="entropy_8h_html_a91eeab75dbfc3730efdc415f57e9f4ac"><div class="ttname"><a href="entropy_8h.html#a91eeab75dbfc3730efdc415f57e9f4ac">POLARSSL_ERR_ENTROPY_MAX_SOURCES</a></div><div class="ttdeci">#define POLARSSL_ERR_ENTROPY_MAX_SOURCES</div><div class="ttdoc">No more sources can be added. </div><div class="ttdef"><b>Definition:</b> <a href="entropy_8h_source.html#l00057">entropy.h:57</a></div></div>
<div class="ttc" id="structentropy__context_html_aefbbd08781221ef60ca9c901398e008f"><div class="ttname"><a href="structentropy__context.html#aefbbd08781221ef60ca9c901398e008f">entropy_context::accumulator</a></div><div class="ttdeci">sha512_context accumulator</div><div class="ttdef"><b>Definition:</b> <a href="entropy_8h_source.html#l00124">entropy.h:124</a></div></div>
<div class="ttc" id="havege_8h_html_af7432cd400b6f89ec3b4b14e9b0fe4f9"><div class="ttname"><a href="havege_8h.html#af7432cd400b6f89ec3b4b14e9b0fe4f9">havege_free</a></div><div class="ttdeci">void havege_free(havege_state *hs)</div><div class="ttdoc">Clear HAVEGE state. </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="entropy_8h_html_abe16e67991416febc3144c0c8888e792"><div class="ttname"><a href="entropy_8h.html#abe16e67991416febc3144c0c8888e792">entropy_gather</a></div><div class="ttdeci">int entropy_gather(entropy_context *ctx)</div><div class="ttdoc">Trigger an extra gather poll for the accumulator (Thread-safe if POLARSSL_THREADING_C is enabled) ...</div></div>
<div class="ttc" id="entropy__poll_8h_html_a790c9f23655a9bbe05053276e91ad093"><div class="ttname"><a href="entropy__poll_8h.html#a790c9f23655a9bbe05053276e91ad093">ENTROPY_MIN_HARDCLOCK</a></div><div class="ttdeci">#define ENTROPY_MIN_HARDCLOCK</div><div class="ttdoc">Minimum for hardclock() </div><div class="ttdef"><b>Definition:</b> <a href="entropy__poll_8h_source.html#l00047">entropy_poll.h:47</a></div></div>
<div class="ttc" id="structentropy__context_html"><div class="ttname"><a href="structentropy__context.html">entropy_context</a></div><div class="ttdoc">Entropy context structure. </div><div class="ttdef"><b>Definition:</b> <a href="entropy_8h_source.html#l00121">entropy.h:121</a></div></div>
<div class="ttc" id="structentropy__context_html_a7af60cf36a02db4971577d1da52040bb"><div class="ttname"><a href="structentropy__context.html#a7af60cf36a02db4971577d1da52040bb">entropy_context::source_count</a></div><div class="ttdeci">int source_count</div><div class="ttdef"><b>Definition:</b> <a href="entropy_8h_source.html#l00128">entropy.h:128</a></div></div>
<div class="ttc" id="entropy_8h_html_acc7f201066c056a514433c5a6224b720"><div class="ttname"><a href="entropy_8h.html#acc7f201066c056a514433c5a6224b720">ENTROPY_MAX_GATHER</a></div><div class="ttdeci">#define ENTROPY_MAX_GATHER</div><div class="ttdoc">Maximum amount requested from entropy sources. </div><div class="ttdef"><b>Definition:</b> <a href="entropy_8h_source.html#l00074">entropy.h:74</a></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="structsource__state_html_a2dbfe60df6a2808b1347990651287758"><div class="ttname"><a href="structsource__state.html#a2dbfe60df6a2808b1347990651287758">source_state::p_source</a></div><div class="ttdeci">void * p_source</div><div class="ttdoc">The callback data pointer. </div><div class="ttdef"><b>Definition:</b> <a href="entropy_8h_source.html#l00112">entropy.h:112</a></div></div>
<div class="ttc" id="entropy__poll_8h_html"><div class="ttname"><a href="entropy__poll_8h.html">entropy_poll.h</a></div><div class="ttdoc">Platform-specific and custom entropy polling functions. </div></div>
<div class="ttc" id="entropy_8h_html"><div class="ttname"><a href="entropy_8h.html">entropy.h</a></div><div class="ttdoc">Entropy accumulator implementation. </div></div>
<div class="ttc" id="entropy_8h_html_a8c3a8b8e81c2b4e3c03d3704029bca39"><div class="ttname"><a href="entropy_8h.html#a8c3a8b8e81c2b4e3c03d3704029bca39">ENTROPY_SOURCE_MANUAL</a></div><div class="ttdeci">#define ENTROPY_SOURCE_MANUAL</div><div class="ttdef"><b>Definition:</b> <a href="entropy_8h_source.html#l00086">entropy.h:86</a></div></div>
<div class="ttc" id="entropy_8h_html_a4267ff128fbe2ca4da2584359821d09d"><div class="ttname"><a href="entropy_8h.html#a4267ff128fbe2ca4da2584359821d09d">f_source_ptr</a></div><div class="ttdeci">int(* f_source_ptr)(void *data, unsigned char *output, size_t len, size_t *olen)</div><div class="ttdoc">Entropy poll callback pointer. </div><div class="ttdef"><b>Definition:</b> <a href="entropy_8h_source.html#l00103">entropy.h:103</a></div></div>
<div class="ttc" id="structentropy__context_html_a386078ac574665c242900d1215dc900b"><div class="ttname"><a href="structentropy__context.html#a386078ac574665c242900d1215dc900b">entropy_context::source</a></div><div class="ttdeci">source_state source[ENTROPY_MAX_SOURCES]</div><div class="ttdef"><b>Definition:</b> <a href="entropy_8h_source.html#l00129">entropy.h:129</a></div></div>
<div class="ttc" id="entropy_8h_html_a4610ce6582323b8906b9e05ae6253dfb"><div class="ttname"><a href="entropy_8h.html#a4610ce6582323b8906b9e05ae6253dfb">ENTROPY_BLOCK_SIZE</a></div><div class="ttdeci">#define ENTROPY_BLOCK_SIZE</div><div class="ttdoc">Block size of entropy accumulator (SHA-512) </div><div class="ttdef"><b>Definition:</b> <a href="entropy_8h_source.html#l00080">entropy.h:80</a></div></div>
<div class="ttc" id="entropy_8h_html_aeec06418558ccfd52a9967ad54f197c4"><div class="ttname"><a href="entropy_8h.html#aeec06418558ccfd52a9967ad54f197c4">entropy_write_seed_file</a></div><div class="ttdeci">int entropy_write_seed_file(entropy_context *ctx, const char *path)</div><div class="ttdoc">Write a seed file. </div></div>
<div class="ttc" id="entropy__poll_8h_html_a99bec0aa7de17714859f1d2c2e547c64"><div class="ttname"><a href="entropy__poll_8h.html#a99bec0aa7de17714859f1d2c2e547c64">ENTROPY_MIN_HAVEGE</a></div><div class="ttdeci">#define ENTROPY_MIN_HAVEGE</div><div class="ttdoc">Minimum for HAVEGE. </div><div class="ttdef"><b>Definition:</b> <a href="entropy__poll_8h_source.html#l00046">entropy_poll.h:46</a></div></div>
<div class="ttc" id="structsource__state_html_a645e64c552b6515b0c65685321189d24"><div class="ttname"><a href="structsource__state.html#a645e64c552b6515b0c65685321189d24">source_state::size</a></div><div class="ttdeci">size_t size</div><div class="ttdoc">Amount received. </div><div class="ttdef"><b>Definition:</b> <a href="entropy_8h_source.html#l00113">entropy.h:113</a></div></div>
<div class="ttc" id="structsource__state_html_a1ce2b87d8ba2a9df5e75705eeee155a2"><div class="ttname"><a href="structsource__state.html#a1ce2b87d8ba2a9df5e75705eeee155a2">source_state::f_source</a></div><div class="ttdeci">f_source_ptr f_source</div><div class="ttdoc">The entropy source callback. </div><div class="ttdef"><b>Definition:</b> <a href="entropy_8h_source.html#l00111">entropy.h:111</a></div></div>
<div class="ttc" id="sha256_8h_html_ae8e12a0ae383d163ed4d5ead3b96c4de"><div class="ttname"><a href="sha256_8h.html#ae8e12a0ae383d163ed4d5ead3b96c4de">sha256_starts</a></div><div class="ttdeci">void sha256_starts(sha256_context *ctx, int is224)</div><div class="ttdoc">SHA-256 context setup. </div></div>
<div class="ttc" id="structsha512__context_html"><div class="ttname"><a href="structsha512__context.html">sha512_context</a></div><div class="ttdoc">SHA-512 context structure. </div><div class="ttdef"><b>Definition:</b> <a href="sha512_8h_source.html#l00059">sha512.h:59</a></div></div>
<div class="ttc" id="entropy_8h_html_a23cd05df3838590ba3b1688290c9c1fa"><div class="ttname"><a href="entropy_8h.html#a23cd05df3838590ba3b1688290c9c1fa">ENTROPY_MAX_SEED_SIZE</a></div><div class="ttdeci">#define ENTROPY_MAX_SEED_SIZE</div><div class="ttdoc">Maximum size of seed we read from seed file. </div><div class="ttdef"><b>Definition:</b> <a href="entropy_8h_source.html#l00085">entropy.h:85</a></div></div>
<div class="ttc" id="sha512_8h_html_a6079e154daa986d2e8b0be61c21063ef"><div class="ttname"><a href="sha512_8h.html#a6079e154daa986d2e8b0be61c21063ef">sha512_starts</a></div><div class="ttdeci">void sha512_starts(sha512_context *ctx, int is384)</div><div class="ttdoc">SHA-512 context setup. </div></div>
<div class="ttc" id="sha512_8h_html_a84e277fd84a8cbacceabcd0909610681"><div class="ttname"><a href="sha512_8h.html#a84e277fd84a8cbacceabcd0909610681">sha512</a></div><div class="ttdeci">void sha512(const unsigned char *input, size_t ilen, unsigned char output[64], int is384)</div><div class="ttdoc">Output = SHA-512( input buffer ) </div></div>
<div class="ttc" id="havege_8h_html"><div class="ttname"><a href="havege_8h.html">havege.h</a></div><div class="ttdoc">HAVEGE: HArdware Volatile Entropy Gathering and Expansion. </div></div>
<div class="ttc" id="entropy__poll_8h_html_a44ba03df3585a31c6c8395e3893486d0"><div class="ttname"><a href="entropy__poll_8h.html#a44ba03df3585a31c6c8395e3893486d0">platform_entropy_poll</a></div><div class="ttdeci">int platform_entropy_poll(void *data, unsigned char *output, size_t len, size_t *olen)</div><div class="ttdoc">Platform-specific entropy poll callback. </div></div>
<div class="ttc" id="threading_8h_html_aaf60b0265d71e36e1429c513e2890a0f"><div class="ttname"><a href="threading_8h.html#aaf60b0265d71e36e1429c513e2890a0f">polarssl_mutex_free</a></div><div class="ttdeci">int(* polarssl_mutex_free)(threading_mutex_t *mutex)</div></div>
<div class="ttc" id="entropy_8h_html_aee40647ce61215ca2765e9ab3c84a47c"><div class="ttname"><a href="entropy_8h.html#aee40647ce61215ca2765e9ab3c84a47c">entropy_self_test</a></div><div class="ttdeci">int entropy_self_test(int verbose)</div><div class="ttdoc">Checkup routine. </div></div>
<div class="ttc" id="sha512_8h_html_abbbcba6e6c1a9c6b098be20418d81305"><div class="ttname"><a href="sha512_8h.html#abbbcba6e6c1a9c6b098be20418d81305">sha512_finish</a></div><div class="ttdeci">void sha512_finish(sha512_context *ctx, unsigned char output[64])</div><div class="ttdoc">SHA-512 final digest. </div></div>
<div class="ttc" id="havege_8h_html_a86f553a34ca010f502beada3729f202b"><div class="ttname"><a href="havege_8h.html#a86f553a34ca010f502beada3729f202b">havege_init</a></div><div class="ttdeci">void havege_init(havege_state *hs)</div><div class="ttdoc">HAVEGE initialization. </div></div>
<div class="ttc" id="structsource__state_html_a58050b25725620cafe76c9c1d2b0ecf1"><div class="ttname"><a href="structsource__state.html#a58050b25725620cafe76c9c1d2b0ecf1">source_state::threshold</a></div><div class="ttdeci">size_t threshold</div><div class="ttdoc">Minimum level required before release. </div><div class="ttdef"><b>Definition:</b> <a href="entropy_8h_source.html#l00114">entropy.h:114</a></div></div>
<div class="ttc" id="threading_8h_html_a3f71f2d457fdf4f03268eb731abf3a98"><div class="ttname"><a href="threading_8h.html#a3f71f2d457fdf4f03268eb731abf3a98">polarssl_mutex_unlock</a></div><div class="ttdeci">int(* polarssl_mutex_unlock)(threading_mutex_t *mutex)</div></div>
<div class="ttc" id="entropy_8h_html_a0b3765116f6d9d1cbdd5d2c4faee5d33"><div class="ttname"><a href="entropy_8h.html#a0b3765116f6d9d1cbdd5d2c4faee5d33">POLARSSL_ERR_ENTROPY_NO_SOURCES_DEFINED</a></div><div class="ttdeci">#define POLARSSL_ERR_ENTROPY_NO_SOURCES_DEFINED</div><div class="ttdoc">No sources have been added to poll. </div><div class="ttdef"><b>Definition:</b> <a href="entropy_8h_source.html#l00058">entropy.h:58</a></div></div>
<div class="ttc" id="threading_8h_html_aa6c63dc2e1bfeab14346ded406410603"><div class="ttname"><a href="threading_8h.html#aa6c63dc2e1bfeab14346ded406410603">polarssl_mutex_init</a></div><div class="ttdeci">int(* polarssl_mutex_init)(threading_mutex_t *mutex)</div></div>
<div class="ttc" id="threading_8h_html_afea02eb560c790911a89035bbcc909ad"><div class="ttname"><a href="threading_8h.html#afea02eb560c790911a89035bbcc909ad">POLARSSL_ERR_THREADING_MUTEX_ERROR</a></div><div class="ttdeci">#define POLARSSL_ERR_THREADING_MUTEX_ERROR</div><div class="ttdoc">Locking / unlocking / free failed with error code. </div><div class="ttdef"><b>Definition:</b> <a href="threading_8h_source.html#l00044">threading.h:44</a></div></div>
<div class="ttc" id="entropy_8h_html_a5d16f198ece9ccdfe5f80780bf5cee33"><div class="ttname"><a href="entropy_8h.html#a5d16f198ece9ccdfe5f80780bf5cee33">entropy_update_seed_file</a></div><div class="ttdeci">int entropy_update_seed_file(entropy_context *ctx, const char *path)</div><div class="ttdoc">Read and update a seed file. </div></div>
<div class="ttc" id="sha256_8h_html_a2336e05cf0778065a128557c3e69fe53"><div class="ttname"><a href="sha256_8h.html#a2336e05cf0778065a128557c3e69fe53">sha256_finish</a></div><div class="ttdeci">void sha256_finish(sha256_context *ctx, unsigned char output[32])</div><div class="ttdoc">SHA-256 final digest. </div></div>
<div class="ttc" id="entropy_8h_html_a348fa499b6e890de696df6b23d9cce39"><div class="ttname"><a href="entropy_8h.html#a348fa499b6e890de696df6b23d9cce39">POLARSSL_ERR_ENTROPY_FILE_IO_ERROR</a></div><div class="ttdeci">#define POLARSSL_ERR_ENTROPY_FILE_IO_ERROR</div><div class="ttdoc">Read/write error in file. </div><div class="ttdef"><b>Definition:</b> <a href="entropy_8h_source.html#l00059">entropy.h:59</a></div></div>
<div class="ttc" id="config-ccm-psk-tls1__2_8h_html_a5e9ba2c083acc78efc758deca62d162d"><div class="ttname"><a href="config-ccm-psk-tls1__2_8h.html#a5e9ba2c083acc78efc758deca62d162d">ENTROPY_MAX_SOURCES</a></div><div class="ttdeci">#define ENTROPY_MAX_SOURCES</div><div class="ttdef"><b>Definition:</b> <a href="config-ccm-psk-tls1__2_8h_source.html#l00047">config-ccm-psk-tls1_2.h:47</a></div></div>
<div class="ttc" id="structsha256__context_html"><div class="ttname"><a href="structsha256__context.html">sha256_context</a></div><div class="ttdoc">SHA-256 context structure. </div><div class="ttdef"><b>Definition:</b> <a href="sha256_8h_source.html#l00058">sha256.h:58</a></div></div>
<div class="ttc" id="entropy_8h_html_a07cc14e42768b04bbcc48a632ad8c442"><div class="ttname"><a href="entropy_8h.html#a07cc14e42768b04bbcc48a632ad8c442">entropy_init</a></div><div class="ttdeci">void entropy_init(entropy_context *ctx)</div><div class="ttdoc">Initialize the context. </div></div>
<div class="ttc" id="entropy_8h_html_ab9ff2b3b04c80aa19556ed9676bf35e2"><div class="ttname"><a href="entropy_8h.html#ab9ff2b3b04c80aa19556ed9676bf35e2">POLARSSL_ERR_ENTROPY_SOURCE_FAILED</a></div><div class="ttdeci">#define POLARSSL_ERR_ENTROPY_SOURCE_FAILED</div><div class="ttdoc">Critical entropy source failure. </div><div class="ttdef"><b>Definition:</b> <a href="entropy_8h_source.html#l00056">entropy.h:56</a></div></div>
<div class="ttc" id="entropy__poll_8h_html_a3f46bcbc1d77975860af4690b7af9630"><div class="ttname"><a href="entropy__poll_8h.html#a3f46bcbc1d77975860af4690b7af9630">hardclock_poll</a></div><div class="ttdeci">int hardclock_poll(void *data, unsigned char *output, size_t len, size_t *olen)</div><div class="ttdoc">hardclock-based entropy poll callback </div></div>
<div class="ttc" id="sha512_8h_html_afaa574d01d7d92bbd637a9a2b30ab1ad"><div class="ttname"><a href="sha512_8h.html#afaa574d01d7d92bbd637a9a2b30ab1ad">sha512_update</a></div><div class="ttdeci">void sha512_update(sha512_context *ctx, const unsigned char *input, size_t ilen)</div><div class="ttdoc">SHA-512 process buffer. </div></div>
<div class="ttc" id="entropy_8h_html_a2b7d7123b31b42902364989975740fe2"><div class="ttname"><a href="entropy_8h.html#a2b7d7123b31b42902364989975740fe2">entropy_func</a></div><div class="ttdeci">int entropy_func(void *data, unsigned char *output, size_t len)</div><div class="ttdoc">Retrieve entropy from the accumulator (Maximum length: ENTROPY_BLOCK_SIZE) (Thread-safe if POLARSSL_T...</div></div>
<div class="ttc" id="entropy_8h_html_ace26c056043473a7f12be97117262fd4"><div class="ttname"><a href="entropy_8h.html#ace26c056043473a7f12be97117262fd4">entropy_free</a></div><div class="ttdeci">void entropy_free(entropy_context *ctx)</div><div class="ttdoc">Free the data in the context. </div></div>
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