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<li class="navelem"><a class="el" href="dir_bc0718b08fb2015b8e59c47b2805f60c.html">libraries</a></li><li class="navelem"><a class="el" href="dir_e2ce51835550ba18edf07a8311722290.html">Crypto</a></li> </ul>
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<div class="title">KeccakCore.cpp</div> </div>
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</div><!--header-->
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<div class="contents">
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/*</span></div>
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<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Copyright (C) 2015 Southern Storm Software, Pty Ltd.</span></div>
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<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> *</span></div>
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<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * Permission is hereby granted, free of charge, to any person obtaining a</span></div>
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<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * copy of this software and associated documentation files (the "Software"),</span></div>
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<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * to deal in the Software without restriction, including without limitation</span></div>
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<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * the rights to use, copy, modify, merge, publish, distribute, sublicense,</span></div>
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<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * and/or sell copies of the Software, and to permit persons to whom the</span></div>
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<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * Software is furnished to do so, subject to the following conditions:</span></div>
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<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> *</span></div>
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<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * The above copyright notice and this permission notice shall be included</span></div>
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<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * in all copies or substantial portions of the Software.</span></div>
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<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> *</span></div>
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<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS</span></div>
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<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,</span></div>
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<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE</span></div>
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<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER</span></div>
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<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING</span></div>
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<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER</span></div>
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<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> * DEALINGS IN THE SOFTWARE.</span></div>
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<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> */</span></div>
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<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> </div>
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<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor">#include "KeccakCore.h"</span></div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include "Crypto.h"</span></div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include "utility/EndianUtil.h"</span></div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include "utility/RotateUtil.h"</span></div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor">#include "utility/ProgMemUtil.h"</span></div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#include <string.h></span></div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> </div>
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<div class="line"><a name="l00049"></a><span class="lineno"><a class="line" href="classKeccakCore.html#a850c8e85bdb6b347411239716535d9c9"> 49</a></span> <a class="code" href="classKeccakCore.html#a850c8e85bdb6b347411239716535d9c9">KeccakCore::KeccakCore</a>()</div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  : _blockSize(8)</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> {</div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  memset(state.A, 0, <span class="keyword">sizeof</span>(state.A));</div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  state.inputSize = 0;</div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  state.outputSize = 0;</div>
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<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> }</div>
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<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> </div>
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<div class="line"><a name="l00061"></a><span class="lineno"><a class="line" href="classKeccakCore.html#a4579e3a9b24f1d615fa8d660c23e77a4"> 61</a></span> <a class="code" href="classKeccakCore.html#a4579e3a9b24f1d615fa8d660c23e77a4">KeccakCore::~KeccakCore</a>()</div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> {</div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  clean(state);</div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> }</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> </div>
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<div class="line"><a name="l00071"></a><span class="lineno"><a class="line" href="classKeccakCore.html#a804b895121a4e04bc491f41a5821a13e"> 71</a></span> <span class="keywordtype">size_t</span> <a class="code" href="classKeccakCore.html#a804b895121a4e04bc491f41a5821a13e">KeccakCore::capacity</a>()<span class="keyword"> const</span></div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="keyword"></span>{</div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <span class="keywordflow">return</span> 1600 - ((size_t)_blockSize) * 8;</div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> }</div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> </div>
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<div class="line"><a name="l00089"></a><span class="lineno"><a class="line" href="classKeccakCore.html#ab3c1905f2002e49aca085d6f0b5546f7"> 89</a></span> <span class="keywordtype">void</span> <a class="code" href="classKeccakCore.html#ab3c1905f2002e49aca085d6f0b5546f7">KeccakCore::setCapacity</a>(<span class="keywordtype">size_t</span> capacity)</div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> {</div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  _blockSize = (1600 - <a class="code" href="classKeccakCore.html#a804b895121a4e04bc491f41a5821a13e">capacity</a>) / 8;</div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <a class="code" href="classKeccakCore.html#a5a322eb7e3b5c1eaad127c9c6e6a529b">reset</a>();</div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span> }</div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span> </div>
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<div class="line"><a name="l00109"></a><span class="lineno"><a class="line" href="classKeccakCore.html#a5a322eb7e3b5c1eaad127c9c6e6a529b"> 109</a></span> <span class="keywordtype">void</span> <a class="code" href="classKeccakCore.html#a5a322eb7e3b5c1eaad127c9c6e6a529b">KeccakCore::reset</a>()</div>
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<div class="line"><a name="l00110"></a><span class="lineno"> 110</span> {</div>
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<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  memset(state.A, 0, <span class="keyword">sizeof</span>(state.A));</div>
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<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  state.inputSize = 0;</div>
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<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  state.outputSize = 0;</div>
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<div class="line"><a name="l00114"></a><span class="lineno"> 114</span> }</div>
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<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> </div>
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<div class="line"><a name="l00128"></a><span class="lineno"><a class="line" href="classKeccakCore.html#aaaa0355ccec0f469ac8eb577bdf853ed"> 128</a></span> <span class="keywordtype">void</span> <a class="code" href="classKeccakCore.html#aaaa0355ccec0f469ac8eb577bdf853ed">KeccakCore::update</a>(<span class="keyword">const</span> <span class="keywordtype">void</span> *data, <span class="keywordtype">size_t</span> size)</div>
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<div class="line"><a name="l00129"></a><span class="lineno"> 129</span> {</div>
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<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <span class="comment">// Stop generating output while we incorporate the new data.</span></div>
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<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  state.outputSize = 0;</div>
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<div class="line"><a name="l00132"></a><span class="lineno"> 132</span> </div>
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<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="comment">// Break the input up into chunks and process each in turn.</span></div>
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<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  <span class="keyword">const</span> uint8_t *d = (<span class="keyword">const</span> uint8_t *)data;</div>
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<div class="line"><a name="l00135"></a><span class="lineno"> 135</span> <span class="preprocessor">#if !defined(CRYPTO_LITTLE_ENDIAN)</span></div>
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<div class="line"><a name="l00136"></a><span class="lineno"> 136</span> <span class="preprocessor"></span> uint64_t *Awords = &(state.A[0][0]);</div>
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<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  uint8_t index, index2;</div>
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<div class="line"><a name="l00138"></a><span class="lineno"> 138</span> <span class="preprocessor">#endif</span></div>
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<div class="line"><a name="l00139"></a><span class="lineno"> 139</span> <span class="preprocessor"></span> <span class="keywordflow">while</span> (size > 0) {</div>
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<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  uint8_t len = _blockSize - state.inputSize;</div>
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<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <span class="keywordflow">if</span> (len > size)</div>
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<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  len = size;</div>
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<div class="line"><a name="l00143"></a><span class="lineno"> 143</span> <span class="preprocessor">#if defined(CRYPTO_LITTLE_ENDIAN)</span></div>
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<div class="line"><a name="l00144"></a><span class="lineno"> 144</span> <span class="preprocessor"></span> uint8_t *Abytes = ((uint8_t *)state.A) + state.inputSize;</div>
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<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <span class="keywordflow">for</span> (uint8_t posn = 0; posn < len; ++posn)</div>
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<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  Abytes[posn] ^= d[posn];</div>
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<div class="line"><a name="l00147"></a><span class="lineno"> 147</span> <span class="preprocessor">#else</span></div>
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<div class="line"><a name="l00148"></a><span class="lineno"> 148</span> <span class="preprocessor"></span> index2 = state.inputSize;</div>
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<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <span class="keywordflow">for</span> (index = 0; index < len; ++index) {</div>
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<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  Awords[index2 / 8] ^= (((uint64_t)d[index]) << ((index2 % 8) * 8));</div>
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<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  ++index2;</div>
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<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  }</div>
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<div class="line"><a name="l00153"></a><span class="lineno"> 153</span> <span class="preprocessor">#endif</span></div>
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<div class="line"><a name="l00154"></a><span class="lineno"> 154</span> <span class="preprocessor"></span> state.inputSize += len;</div>
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<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  size -= len;</div>
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<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  d += len;</div>
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<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  <span class="keywordflow">if</span> (state.inputSize == _blockSize) {</div>
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<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  keccakp();</div>
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<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  state.inputSize = 0;</div>
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<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  }</div>
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<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  }</div>
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<div class="line"><a name="l00162"></a><span class="lineno"> 162</span> }</div>
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<div class="line"><a name="l00163"></a><span class="lineno"> 163</span> </div>
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<div class="line"><a name="l00174"></a><span class="lineno"><a class="line" href="classKeccakCore.html#a97852ee4381ced17ee6d21704cf0b4d7"> 174</a></span> <span class="keywordtype">void</span> <a class="code" href="classKeccakCore.html#a97852ee4381ced17ee6d21704cf0b4d7">KeccakCore::pad</a>(uint8_t tag)</div>
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<div class="line"><a name="l00175"></a><span class="lineno"> 175</span> {</div>
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<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  <span class="comment">// Padding for SHA3-NNN variants according to FIPS 202 appends "01",</span></div>
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<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <span class="comment">// then another "1", then many zero bits, followed by a final "1".</span></div>
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<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  <span class="comment">// SHAKE appends "1111" first instead of "01". Note that SHA-3 numbers</span></div>
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<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="comment">// bits from the least significant, so appending "01" is equivalent</span></div>
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<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <span class="comment">// to 0x02 for byte-aligned data, not 0x40.</span></div>
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<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  uint8_t size = state.inputSize;</div>
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<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  uint64_t *Awords = &(state.A[0][0]);</div>
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|
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  Awords[size / 8] ^= (((uint64_t)tag) << ((size % 8) * 8));</div>
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|
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  Awords[(_blockSize - 1) / 8] ^= 0x8000000000000000ULL;</div>
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|
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  keccakp();</div>
|
|
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  state.inputSize = 0;</div>
|
|
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  state.outputSize = 0;</div>
|
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<div class="line"><a name="l00188"></a><span class="lineno"> 188</span> }</div>
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<div class="line"><a name="l00189"></a><span class="lineno"> 189</span> </div>
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<div class="line"><a name="l00201"></a><span class="lineno"><a class="line" href="classKeccakCore.html#aad83ece853c0cc15fcab947fdcba924f"> 201</a></span> <span class="keywordtype">void</span> <a class="code" href="classKeccakCore.html#aad83ece853c0cc15fcab947fdcba924f">KeccakCore::extract</a>(<span class="keywordtype">void</span> *data, <span class="keywordtype">size_t</span> size)</div>
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<div class="line"><a name="l00202"></a><span class="lineno"> 202</span> {</div>
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<div class="line"><a name="l00203"></a><span class="lineno"> 203</span> <span class="preprocessor">#if !defined(CRYPTO_LITTLE_ENDIAN)</span></div>
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<div class="line"><a name="l00204"></a><span class="lineno"> 204</span> <span class="preprocessor"></span> uint8_t index, index2;</div>
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|
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  <span class="keyword">const</span> uint64_t *Awords = &(state.A[0][0]);</div>
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|
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span> <span class="preprocessor">#endif</span></div>
|
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<div class="line"><a name="l00207"></a><span class="lineno"> 207</span> <span class="preprocessor"></span></div>
|
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<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <span class="comment">// Stop accepting input while we are generating output.</span></div>
|
|
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  state.inputSize = 0;</div>
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<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="comment">// Copy the output data into the caller's return buffer.</span></div>
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|
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  uint8_t *d = (uint8_t *)data;</div>
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<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  uint8_t tempSize;</div>
|
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<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  <span class="keywordflow">while</span> (size > 0) {</div>
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|
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  <span class="comment">// Generate another output block if the current one has been exhausted.</span></div>
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<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  <span class="keywordflow">if</span> (state.outputSize >= _blockSize) {</div>
|
|
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  keccakp();</div>
|
|
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  state.outputSize = 0;</div>
|
|
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  }</div>
|
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<div class="line"><a name="l00220"></a><span class="lineno"> 220</span> </div>
|
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<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <span class="comment">// How many bytes can we copy this time around?</span></div>
|
|
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  tempSize = _blockSize - state.outputSize;</div>
|
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<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  <span class="keywordflow">if</span> (tempSize > size)</div>
|
|
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  tempSize = size;</div>
|
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<div class="line"><a name="l00225"></a><span class="lineno"> 225</span> </div>
|
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<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  <span class="comment">// Copy the partial output data into the caller's return buffer.</span></div>
|
|
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span> <span class="preprocessor">#if defined(CRYPTO_LITTLE_ENDIAN)</span></div>
|
|
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span> <span class="preprocessor"></span> memcpy(d, ((uint8_t *)(state.A)) + state.outputSize, tempSize);</div>
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<div class="line"><a name="l00229"></a><span class="lineno"> 229</span> <span class="preprocessor">#else</span></div>
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<div class="line"><a name="l00230"></a><span class="lineno"> 230</span> <span class="preprocessor"></span> index2 = state.outputSize;</div>
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<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  <span class="keywordflow">for</span> (index = 0; index < tempSize; ++index) {</div>
|
|
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  d[index] = (uint8_t)(Awords[index2 / 8] >> ((index2 % 8) * 8));</div>
|
|
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  ++index2;</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">#endif</span></div>
|
|
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span> <span class="preprocessor"></span> state.outputSize += tempSize;</div>
|
|
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  size -= tempSize;</div>
|
|
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  d += tempSize;</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> }</div>
|
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<div class="line"><a name="l00241"></a><span class="lineno"> 241</span> </div>
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<div class="line"><a name="l00245"></a><span class="lineno"><a class="line" href="classKeccakCore.html#aeff1df56e4a3103c99c1fe4307e60c66"> 245</a></span> <span class="keywordtype">void</span> <a class="code" href="classKeccakCore.html#aeff1df56e4a3103c99c1fe4307e60c66">KeccakCore::clear</a>()</div>
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<div class="line"><a name="l00246"></a><span class="lineno"> 246</span> {</div>
|
|
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  clean(state);</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> </div>
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<div class="line"><a name="l00263"></a><span class="lineno"><a class="line" href="classKeccakCore.html#aeff6b3357916bf426b60d3629db52628"> 263</a></span> <span class="keywordtype">void</span> <a class="code" href="classKeccakCore.html#aeff6b3357916bf426b60d3629db52628">KeccakCore::setHMACKey</a>(<span class="keyword">const</span> <span class="keywordtype">void</span> *key, <span class="keywordtype">size_t</span> len, uint8_t pad, <span class="keywordtype">size_t</span> hashSize)</div>
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<div class="line"><a name="l00264"></a><span class="lineno"> 264</span> {</div>
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<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  uint8_t *b = (uint8_t *)state.B;</div>
|
|
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  <span class="keywordtype">size_t</span> size = <a class="code" href="classKeccakCore.html#a3742ed39151811b5d1c263c75ee5b20a">blockSize</a>();</div>
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<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  <a class="code" href="classKeccakCore.html#a5a322eb7e3b5c1eaad127c9c6e6a529b">reset</a>();</div>
|
|
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  <span class="keywordflow">if</span> (len <= size) {</div>
|
|
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  memcpy(b, key, len);</div>
|
|
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  } <span class="keywordflow">else</span> {</div>
|
|
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  <a class="code" href="classKeccakCore.html#aaaa0355ccec0f469ac8eb577bdf853ed">update</a>(key, len);</div>
|
|
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  this-><a class="code" href="classKeccakCore.html#a97852ee4381ced17ee6d21704cf0b4d7">pad</a>(0x06);</div>
|
|
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  <a class="code" href="classKeccakCore.html#aad83ece853c0cc15fcab947fdcba924f">extract</a>(b, hashSize);</div>
|
|
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  len = hashSize;</div>
|
|
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  <a class="code" href="classKeccakCore.html#a5a322eb7e3b5c1eaad127c9c6e6a529b">reset</a>();</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>  memset(b + len, pad, size - len);</div>
|
|
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  <span class="keywordflow">while</span> (len > 0) {</div>
|
|
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  *b++ ^= <a class="code" href="classKeccakCore.html#a97852ee4381ced17ee6d21704cf0b4d7">pad</a>;</div>
|
|
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  --len;</div>
|
|
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  }</div>
|
|
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  <a class="code" href="classKeccakCore.html#aaaa0355ccec0f469ac8eb577bdf853ed">update</a>(state.B, size);</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> </div>
|
|
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span> <span class="keywordtype">void</span> KeccakCore::keccakp()</div>
|
|
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span> {</div>
|
|
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  <span class="keyword">static</span> <span class="keyword">const</span> uint8_t addMod5Table[9] PROGMEM = {</div>
|
|
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  0, 1, 2, 3, 4, 0, 1, 2, 3</div>
|
|
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  };</div>
|
|
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span> <span class="preprocessor"> #define addMod5(x, y) (pgm_read_byte(&(addMod5Table[(x) + (y)])))</span></div>
|
|
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span> <span class="preprocessor"></span> uint64_t D;</div>
|
|
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  uint8_t index, index2;</div>
|
|
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  <span class="keywordflow">for</span> (uint8_t round = 0; round < 24; ++round) {</div>
|
|
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  <span class="comment">// Step mapping theta. The specification mentions two temporary</span></div>
|
|
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  <span class="comment">// arrays of size 5 called C and D. To save a bit of memory,</span></div>
|
|
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  <span class="comment">// we use the first row of B to store C and compute D on the fly.</span></div>
|
|
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  <span class="keywordflow">for</span> (index = 0; index < 5; ++index) {</div>
|
|
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  state.B[0][index] = state.A[0][index] ^ state.A[1][index] ^</div>
|
|
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  state.A[2][index] ^ state.A[3][index] ^</div>
|
|
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  state.A[4][index];</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="keywordflow">for</span> (index = 0; index < 5; ++index) {</div>
|
|
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  D = state.B[0][addMod5(index, 4)] ^</div>
|
|
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  leftRotate1_64(state.B[0][addMod5(index, 1)]);</div>
|
|
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  <span class="keywordflow">for</span> (index2 = 0; index2 < 5; ++index2)</div>
|
|
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  state.A[index2][index] ^= D;</div>
|
|
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  }</div>
|
|
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span> </div>
|
|
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  <span class="comment">// Step mapping rho and pi combined into a single step.</span></div>
|
|
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  <span class="comment">// Rotate all lanes by a specific offset and rearrange.</span></div>
|
|
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  state.B[0][0] = state.A[0][0];</div>
|
|
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  state.B[1][0] = leftRotate28_64(state.A[0][3]);</div>
|
|
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  state.B[2][0] = leftRotate1_64 (state.A[0][1]);</div>
|
|
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  state.B[3][0] = leftRotate27_64(state.A[0][4]);</div>
|
|
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  state.B[4][0] = leftRotate62_64(state.A[0][2]);</div>
|
|
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  state.B[0][1] = leftRotate44_64(state.A[1][1]);</div>
|
|
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  state.B[1][1] = leftRotate20_64(state.A[1][4]);</div>
|
|
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  state.B[2][1] = leftRotate6_64 (state.A[1][2]);</div>
|
|
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  state.B[3][1] = leftRotate36_64(state.A[1][0]);</div>
|
|
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  state.B[4][1] = leftRotate55_64(state.A[1][3]);</div>
|
|
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  state.B[0][2] = leftRotate43_64(state.A[2][2]);</div>
|
|
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  state.B[1][2] = leftRotate3_64 (state.A[2][0]);</div>
|
|
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  state.B[2][2] = leftRotate25_64(state.A[2][3]);</div>
|
|
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  state.B[3][2] = leftRotate10_64(state.A[2][1]);</div>
|
|
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  state.B[4][2] = leftRotate39_64(state.A[2][4]);</div>
|
|
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  state.B[0][3] = leftRotate21_64(state.A[3][3]);</div>
|
|
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  state.B[1][3] = leftRotate45_64(state.A[3][1]);</div>
|
|
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  state.B[2][3] = leftRotate8_64 (state.A[3][4]);</div>
|
|
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  state.B[3][3] = leftRotate15_64(state.A[3][2]);</div>
|
|
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  state.B[4][3] = leftRotate41_64(state.A[3][0]);</div>
|
|
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  state.B[0][4] = leftRotate14_64(state.A[4][4]);</div>
|
|
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  state.B[1][4] = leftRotate61_64(state.A[4][2]);</div>
|
|
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  state.B[2][4] = leftRotate18_64(state.A[4][0]);</div>
|
|
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  state.B[3][4] = leftRotate56_64(state.A[4][3]);</div>
|
|
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  state.B[4][4] = leftRotate2_64 (state.A[4][1]);</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="comment">// Step mapping chi. Combine each lane with two other lanes in its row.</span></div>
|
|
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  <span class="keywordflow">for</span> (index = 0; index < 5; ++index) {</div>
|
|
<div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  <span class="keywordflow">for</span> (index2 = 0; index2 < 5; ++index2) {</div>
|
|
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span>  state.A[index2][index] =</div>
|
|
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  state.B[index2][index] ^</div>
|
|
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  ((~state.B[index2][addMod5(index, 1)]) &</div>
|
|
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  state.B[index2][addMod5(index, 2)]);</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>  }</div>
|
|
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span> </div>
|
|
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span>  <span class="comment">// Step mapping iota. XOR A[0][0] with the round constant.</span></div>
|
|
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  <span class="keyword">static</span> uint64_t <span class="keyword">const</span> RC[24] PROGMEM = {</div>
|
|
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  0x0000000000000001ULL, 0x0000000000008082ULL, 0x800000000000808AULL,</div>
|
|
<div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  0x8000000080008000ULL, 0x000000000000808BULL, 0x0000000080000001ULL,</div>
|
|
<div class="line"><a name="l00354"></a><span class="lineno"> 354</span>  0x8000000080008081ULL, 0x8000000000008009ULL, 0x000000000000008AULL,</div>
|
|
<div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  0x0000000000000088ULL, 0x0000000080008009ULL, 0x000000008000000AULL,</div>
|
|
<div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  0x000000008000808BULL, 0x800000000000008BULL, 0x8000000000008089ULL,</div>
|
|
<div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  0x8000000000008003ULL, 0x8000000000008002ULL, 0x8000000000000080ULL,</div>
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<div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  0x000000000000800AULL, 0x800000008000000AULL, 0x8000000080008081ULL,</div>
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<div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  0x8000000000008080ULL, 0x0000000080000001ULL, 0x8000000080008008ULL</div>
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<div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  };</div>
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<div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  state.A[0][0] ^= pgm_read_qword(RC + round);</div>
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<div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  }</div>
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<div class="line"><a name="l00363"></a><span class="lineno"> 363</span> }</div>
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<div class="ttc" id="classKeccakCore_html_a3742ed39151811b5d1c263c75ee5b20a"><div class="ttname"><a href="classKeccakCore.html#a3742ed39151811b5d1c263c75ee5b20a">KeccakCore::blockSize</a></div><div class="ttdeci">size_t blockSize() const </div><div class="ttdoc">Returns the input block size for the sponge function in bytes. </div><div class="ttdef"><b>Definition:</b> <a href="KeccakCore_8h_source.html#l00038">KeccakCore.h:38</a></div></div>
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<div class="ttc" id="classKeccakCore_html_aeff6b3357916bf426b60d3629db52628"><div class="ttname"><a href="classKeccakCore.html#aeff6b3357916bf426b60d3629db52628">KeccakCore::setHMACKey</a></div><div class="ttdeci">void setHMACKey(const void *key, size_t len, uint8_t pad, size_t hashSize)</div><div class="ttdoc">Sets a HMAC key for a Keccak-based hash algorithm. </div><div class="ttdef"><b>Definition:</b> <a href="KeccakCore_8cpp_source.html#l00263">KeccakCore.cpp:263</a></div></div>
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<div class="ttc" id="classKeccakCore_html_ab3c1905f2002e49aca085d6f0b5546f7"><div class="ttname"><a href="classKeccakCore.html#ab3c1905f2002e49aca085d6f0b5546f7">KeccakCore::setCapacity</a></div><div class="ttdeci">void setCapacity(size_t capacity)</div><div class="ttdoc">Sets the capacity of the Keccak sponge function in bits. </div><div class="ttdef"><b>Definition:</b> <a href="KeccakCore_8cpp_source.html#l00089">KeccakCore.cpp:89</a></div></div>
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<div class="ttc" id="classKeccakCore_html_a4579e3a9b24f1d615fa8d660c23e77a4"><div class="ttname"><a href="classKeccakCore.html#a4579e3a9b24f1d615fa8d660c23e77a4">KeccakCore::~KeccakCore</a></div><div class="ttdeci">~KeccakCore()</div><div class="ttdoc">Destroys this Keccak sponge function after clearing all sensitive information. </div><div class="ttdef"><b>Definition:</b> <a href="KeccakCore_8cpp_source.html#l00061">KeccakCore.cpp:61</a></div></div>
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<div class="ttc" id="classKeccakCore_html_aad83ece853c0cc15fcab947fdcba924f"><div class="ttname"><a href="classKeccakCore.html#aad83ece853c0cc15fcab947fdcba924f">KeccakCore::extract</a></div><div class="ttdeci">void extract(void *data, size_t size)</div><div class="ttdoc">Extracts data from the Keccak sponge function. </div><div class="ttdef"><b>Definition:</b> <a href="KeccakCore_8cpp_source.html#l00201">KeccakCore.cpp:201</a></div></div>
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<div class="ttc" id="classKeccakCore_html_a97852ee4381ced17ee6d21704cf0b4d7"><div class="ttname"><a href="classKeccakCore.html#a97852ee4381ced17ee6d21704cf0b4d7">KeccakCore::pad</a></div><div class="ttdeci">void pad(uint8_t tag)</div><div class="ttdoc">Pads the last block of input data to blockSize(). </div><div class="ttdef"><b>Definition:</b> <a href="KeccakCore_8cpp_source.html#l00174">KeccakCore.cpp:174</a></div></div>
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<div class="ttc" id="classKeccakCore_html_a804b895121a4e04bc491f41a5821a13e"><div class="ttname"><a href="classKeccakCore.html#a804b895121a4e04bc491f41a5821a13e">KeccakCore::capacity</a></div><div class="ttdeci">size_t capacity() const </div><div class="ttdoc">Returns the capacity of the sponge function in bits. </div><div class="ttdef"><b>Definition:</b> <a href="KeccakCore_8cpp_source.html#l00071">KeccakCore.cpp:71</a></div></div>
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<div class="ttc" id="classKeccakCore_html_a850c8e85bdb6b347411239716535d9c9"><div class="ttname"><a href="classKeccakCore.html#a850c8e85bdb6b347411239716535d9c9">KeccakCore::KeccakCore</a></div><div class="ttdeci">KeccakCore()</div><div class="ttdoc">Constructs a new Keccak sponge function. </div><div class="ttdef"><b>Definition:</b> <a href="KeccakCore_8cpp_source.html#l00049">KeccakCore.cpp:49</a></div></div>
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<div class="ttc" id="classKeccakCore_html_aaaa0355ccec0f469ac8eb577bdf853ed"><div class="ttname"><a href="classKeccakCore.html#aaaa0355ccec0f469ac8eb577bdf853ed">KeccakCore::update</a></div><div class="ttdeci">void update(const void *data, size_t size)</div><div class="ttdoc">Updates the Keccak sponge function with more input data. </div><div class="ttdef"><b>Definition:</b> <a href="KeccakCore_8cpp_source.html#l00128">KeccakCore.cpp:128</a></div></div>
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<div class="ttc" id="classKeccakCore_html_aeff1df56e4a3103c99c1fe4307e60c66"><div class="ttname"><a href="classKeccakCore.html#aeff1df56e4a3103c99c1fe4307e60c66">KeccakCore::clear</a></div><div class="ttdeci">void clear()</div><div class="ttdoc">Clears all sensitive data from this object. </div><div class="ttdef"><b>Definition:</b> <a href="KeccakCore_8cpp_source.html#l00245">KeccakCore.cpp:245</a></div></div>
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<div class="ttc" id="classKeccakCore_html_a5a322eb7e3b5c1eaad127c9c6e6a529b"><div class="ttname"><a href="classKeccakCore.html#a5a322eb7e3b5c1eaad127c9c6e6a529b">KeccakCore::reset</a></div><div class="ttdeci">void reset()</div><div class="ttdoc">Resets the Keccak sponge function ready for a new session. </div><div class="ttdef"><b>Definition:</b> <a href="KeccakCore_8cpp_source.html#l00109">KeccakCore.cpp:109</a></div></div>
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