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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">XTS.cpp</div> </div>
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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) 2016 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 "XTS.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 "GF128.h"</span></div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include <string.h></span></div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> </div>
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<div class="line"><a name="l00041"></a><span class="lineno"><a class="line" href="classXTSCommon.html#ae3ce2a2a72eb839f8ccde4a166ad40e6"> 41</a></span> <a class="code" href="classXTSCommon.html#ae3ce2a2a72eb839f8ccde4a166ad40e6">XTSCommon::XTSCommon</a>()</div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  : sectSize(512)</div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> {</div>
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<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> }</div>
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<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> </div>
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<div class="line"><a name="l00049"></a><span class="lineno"><a class="line" href="classXTSCommon.html#ac5398f0bd2201e7d3fa335899fb3c6f3"> 49</a></span> <a class="code" href="classXTSCommon.html#ac5398f0bd2201e7d3fa335899fb3c6f3">XTSCommon::~XTSCommon</a>()</div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> {</div>
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<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  clean(twk);</div>
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<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> }</div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> </div>
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<div class="line"><a name="l00062"></a><span class="lineno"><a class="line" href="classXTSCommon.html#a2da350825a438355665683ab9eb57aa7"> 62</a></span> <span class="keywordtype">size_t</span> <a class="code" href="classXTSCommon.html#a2da350825a438355665683ab9eb57aa7">XTSCommon::keySize</a>()<span class="keyword"> const</span></div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="keyword"></span>{</div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keywordflow">return</span> blockCipher1-><a class="code" href="classBlockCipher.html#afde6004a859e015d877eab3c37042a0f">keySize</a>() * 2;</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="l00066"></a><span class="lineno"> 66</span> </div>
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<div class="line"><a name="l00073"></a><span class="lineno"><a class="line" href="classXTSCommon.html#afb3ebf14c7879bcbc92e3d6cc70b19a9"> 73</a></span> <span class="keywordtype">size_t</span> <a class="code" href="classXTSCommon.html#afb3ebf14c7879bcbc92e3d6cc70b19a9">XTSCommon::tweakSize</a>()<span class="keyword"> const</span></div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="keyword"></span>{</div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="keywordflow">return</span> 16;</div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> }</div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> </div>
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<div class="line"><a name="l00097"></a><span class="lineno"><a class="line" href="classXTSCommon.html#a7e0aa61628285073545a8f8e0b0d981d"> 97</a></span> <span class="keywordtype">bool</span> <a class="code" href="classXTSCommon.html#a7e0aa61628285073545a8f8e0b0d981d">XTSCommon::setSectorSize</a>(<span class="keywordtype">size_t</span> size)</div>
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<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> {</div>
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<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keywordflow">if</span> (size < 16)</div>
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<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  sectSize = size;</div>
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<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00103"></a><span class="lineno"> 103</span> }</div>
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<div class="line"><a name="l00104"></a><span class="lineno"> 104</span> </div>
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<div class="line"><a name="l00119"></a><span class="lineno"><a class="line" href="classXTSCommon.html#a68b1ad6bad0b29aeb97dea80e4e03170"> 119</a></span> <span class="keywordtype">bool</span> <a class="code" href="classXTSCommon.html#a68b1ad6bad0b29aeb97dea80e4e03170">XTSCommon::setKey</a>(<span class="keyword">const</span> uint8_t *key, <span class="keywordtype">size_t</span> len)</div>
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<div class="line"><a name="l00120"></a><span class="lineno"> 120</span> {</div>
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<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <span class="keywordflow">if</span> (!blockCipher1-><a class="code" href="classBlockCipher.html#a9a05307664469777592799c8f77397c4">setKey</a>(key, len / 2))</div>
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<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="keywordflow">return</span> blockCipher2-><a class="code" href="classBlockCipher.html#a9a05307664469777592799c8f77397c4">setKey</a>(key + len / 2, len - (len / 2));</div>
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<div class="line"><a name="l00124"></a><span class="lineno"> 124</span> }</div>
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<div class="line"><a name="l00125"></a><span class="lineno"> 125</span> </div>
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<div class="line"><a name="l00142"></a><span class="lineno"><a class="line" href="classXTSCommon.html#a744a533d46078de5ea9723139f74bcdb"> 142</a></span> <span class="keywordtype">bool</span> <a class="code" href="classXTSCommon.html#a744a533d46078de5ea9723139f74bcdb">XTSCommon::setTweak</a>(<span class="keyword">const</span> uint8_t *tweak, <span class="keywordtype">size_t</span> len)</div>
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<div class="line"><a name="l00143"></a><span class="lineno"> 143</span> {</div>
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<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <span class="keywordflow">if</span> (len > 16)</div>
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<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  memcpy(twk, tweak, len);</div>
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<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  memset(((uint8_t *)twk) + len, 0, 16 - len);</div>
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<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  blockCipher2-><a class="code" href="classBlockCipher.html#aed0788b25f6bb2f1bd47d5a5f0c5db33">encryptBlock</a>((uint8_t *)twk, (uint8_t *)twk);</div>
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<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a name="l00150"></a><span class="lineno"> 150</span> }</div>
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<div class="line"><a name="l00151"></a><span class="lineno"> 151</span> </div>
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<div class="line"><a name="l00152"></a><span class="lineno"> 152</span> <span class="preprocessor">#define xorTweak(output, input, tweak) \</span></div>
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<div class="line"><a name="l00153"></a><span class="lineno"> 153</span> <span class="preprocessor"> do { \</span></div>
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<div class="line"><a name="l00154"></a><span class="lineno"> 154</span> <span class="preprocessor"> for (uint8_t i = 0; i < 16; ++i) \</span></div>
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<div class="line"><a name="l00155"></a><span class="lineno"> 155</span> <span class="preprocessor"> (output)[i] = (input)[i] ^ ((const uint8_t *)(tweak))[i]; \</span></div>
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<div class="line"><a name="l00156"></a><span class="lineno"> 156</span> <span class="preprocessor"> } while (0)</span></div>
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<div class="line"><a name="l00157"></a><span class="lineno"> 157</span> <span class="preprocessor"></span></div>
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<div class="line"><a name="l00170"></a><span class="lineno"><a class="line" href="classXTSCommon.html#a8bf1cbd4c1a5422a3cf285fe995fe0e7"> 170</a></span> <span class="keywordtype">void</span> <a class="code" href="classXTSCommon.html#a8bf1cbd4c1a5422a3cf285fe995fe0e7">XTSCommon::encryptSector</a>(uint8_t *output, <span class="keyword">const</span> uint8_t *input)</div>
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<div class="line"><a name="l00171"></a><span class="lineno"> 171</span> {</div>
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<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  <span class="keywordtype">size_t</span> sectLast = sectSize & ~15;</div>
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<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="keywordtype">size_t</span> posn = 0;</div>
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<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  uint32_t t[4];</div>
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<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  memcpy(t, twk, <span class="keyword">sizeof</span>(t));</div>
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<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  <span class="keywordflow">while</span> (posn < sectLast) {</div>
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<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <span class="comment">// Process all complete 16-byte blocks.</span></div>
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<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  xorTweak(output, input, t);</div>
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<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  blockCipher1-><a class="code" href="classBlockCipher.html#aed0788b25f6bb2f1bd47d5a5f0c5db33">encryptBlock</a>(output, output);</div>
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<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  xorTweak(output, output, t);</div>
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<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  <a class="code" href="classGF128.html#a3732c9471771c36ac1b518e974d46b3e">GF128::dblXTS</a>(t);</div>
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<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  input += 16;</div>
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<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  output += 16;</div>
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<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  posn += 16;</div>
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<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  }</div>
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<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  <span class="keywordflow">if</span> (posn < sectSize) {</div>
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<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  <span class="comment">// Perform ciphertext stealing on the final partial block.</span></div>
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<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  uint8_t leftOver = sectSize - posn;</div>
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<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  output -= 16;</div>
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<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  <span class="keywordflow">while</span> (leftOver > 0) {</div>
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<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  <span class="comment">// Swap the left-over bytes in the last two blocks.</span></div>
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<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  --leftOver;</div>
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<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  uint8_t temp = input[leftOver];</div>
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<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  output[leftOver + 16] = output[leftOver];</div>
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<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  output[leftOver] = temp;</div>
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<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  }</div>
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<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  xorTweak(output, output, t);</div>
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<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  blockCipher1-><a class="code" href="classBlockCipher.html#aed0788b25f6bb2f1bd47d5a5f0c5db33">encryptBlock</a>(output, output);</div>
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<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  xorTweak(output, output, t);</div>
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<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  }</div>
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<div class="line"><a name="l00201"></a><span class="lineno"> 201</span> }</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="l00215"></a><span class="lineno"><a class="line" href="classXTSCommon.html#a7dd21d5a994724e2af433872ecc3a90b"> 215</a></span> <span class="keywordtype">void</span> <a class="code" href="classXTSCommon.html#a7dd21d5a994724e2af433872ecc3a90b">XTSCommon::decryptSector</a>(uint8_t *output, <span class="keyword">const</span> uint8_t *input)</div>
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<div class="line"><a name="l00216"></a><span class="lineno"> 216</span> {</div>
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<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  <span class="keywordtype">size_t</span> sectLast = sectSize & ~15;</div>
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<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  <span class="keywordtype">size_t</span> posn = 0;</div>
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<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  uint32_t t[4];</div>
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<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  memcpy(t, twk, <span class="keyword">sizeof</span>(t));</div>
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<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <span class="keywordflow">if</span> (sectLast != sectSize)</div>
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<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  sectLast -= 16;</div>
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<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  <span class="keywordflow">while</span> (posn < sectLast) {</div>
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<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  <span class="comment">// Process all complete 16-byte blocks.</span></div>
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<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  xorTweak(output, input, t);</div>
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<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  blockCipher1-><a class="code" href="classBlockCipher.html#ac3ba2450222aa1ea804ae4881ab6440c">decryptBlock</a>(output, output);</div>
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<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  xorTweak(output, output, t);</div>
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<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  <a class="code" href="classGF128.html#a3732c9471771c36ac1b518e974d46b3e">GF128::dblXTS</a>(t);</div>
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<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  input += 16;</div>
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<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  output += 16;</div>
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<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  posn += 16;</div>
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<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  }</div>
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<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  <span class="keywordflow">if</span> (posn < sectSize) {</div>
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<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  <span class="comment">// Perform ciphertext stealing on the final two blocks.</span></div>
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<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  uint8_t leftOver = sectSize - 16 - posn;</div>
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<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  uint32_t u[4];</div>
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<div class="line"><a name="l00237"></a><span class="lineno"> 237</span> </div>
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<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  <span class="comment">// Decrypt the second-last block of ciphertext to recover</span></div>
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<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  <span class="comment">// the last partial block of plaintext. We need to use</span></div>
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<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  <span class="comment">// dblXTS(t) as the tweak for this block. Save the current</span></div>
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<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  <span class="comment">// tweak in "u" for use later.</span></div>
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<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  memcpy(u, t, <span class="keyword">sizeof</span>(t));</div>
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<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  <a class="code" href="classGF128.html#a3732c9471771c36ac1b518e974d46b3e">GF128::dblXTS</a>(t);</div>
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<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  xorTweak(output, input, t);</div>
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<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  blockCipher1-><a class="code" href="classBlockCipher.html#ac3ba2450222aa1ea804ae4881ab6440c">decryptBlock</a>(output, output);</div>
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<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  xorTweak(output, output, t);</div>
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<div class="line"><a name="l00247"></a><span class="lineno"> 247</span> </div>
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<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  <span class="comment">// Swap the left-over bytes in the last two blocks.</span></div>
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<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  <span class="keywordflow">while</span> (leftOver > 0) {</div>
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<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  --leftOver;</div>
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<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  uint8_t temp = input[leftOver + 16];</div>
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<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  output[leftOver + 16] = output[leftOver];</div>
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<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  output[leftOver] = temp;</div>
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<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  }</div>
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<div class="line"><a name="l00255"></a><span class="lineno"> 255</span> </div>
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<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  <span class="comment">// Decrypt the second-last block using the second-last tweak.</span></div>
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<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  xorTweak(output, output, u);</div>
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<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  blockCipher1-><a class="code" href="classBlockCipher.html#ac3ba2450222aa1ea804ae4881ab6440c">decryptBlock</a>(output, output);</div>
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<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  xorTweak(output, output, u);</div>
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<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  }</div>
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<div class="line"><a name="l00261"></a><span class="lineno"> 261</span> }</div>
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<div class="line"><a name="l00262"></a><span class="lineno"> 262</span> </div>
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<div class="line"><a name="l00266"></a><span class="lineno"><a class="line" href="classXTSCommon.html#a96e3cb4a3d35dc4e3a5acbae19b4465b"> 266</a></span> <span class="keywordtype">void</span> <a class="code" href="classXTSCommon.html#a96e3cb4a3d35dc4e3a5acbae19b4465b">XTSCommon::clear</a>()</div>
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<div class="line"><a name="l00267"></a><span class="lineno"> 267</span> {</div>
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<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  clean(twk);</div>
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<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  blockCipher1-><a class="code" href="classBlockCipher.html#a6f27d46e9dfa7761d014d828ad5f955b">clear</a>();</div>
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<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  blockCipher2-><a class="code" href="classBlockCipher.html#a6f27d46e9dfa7761d014d828ad5f955b">clear</a>();</div>
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<div class="line"><a name="l00271"></a><span class="lineno"> 271</span> }</div>
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<div class="line"><a name="l00272"></a><span class="lineno"> 272</span> </div>
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<div class="line"><a name="l00303"></a><span class="lineno"><a class="line" href="classXTSSingleKeyCommon.html#a0ab819b391d6e783d2dde4006440444c"> 303</a></span> <a class="code" href="classXTSSingleKeyCommon.html#a0ab819b391d6e783d2dde4006440444c">XTSSingleKeyCommon::~XTSSingleKeyCommon</a>()</div>
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<div class="line"><a name="l00304"></a><span class="lineno"> 304</span> {</div>
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<div class="line"><a name="l00305"></a><span class="lineno"> 305</span> }</div>
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<div class="line"><a name="l00306"></a><span class="lineno"> 306</span> </div>
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<div class="line"><a name="l00315"></a><span class="lineno"><a class="line" href="classXTSSingleKeyCommon.html#ac017d457a08001a3ea44a9900dee2b64"> 315</a></span> <span class="keywordtype">size_t</span> <a class="code" href="classXTSSingleKeyCommon.html#ac017d457a08001a3ea44a9900dee2b64">XTSSingleKeyCommon::keySize</a>()<span class="keyword"> const</span></div>
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<div class="line"><a name="l00316"></a><span class="lineno"> 316</span> <span class="keyword"></span>{</div>
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<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  <span class="keywordflow">return</span> blockCipher1->keySize();</div>
|
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<div class="line"><a name="l00318"></a><span class="lineno"> 318</span> }</div>
|
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<div class="line"><a name="l00319"></a><span class="lineno"> 319</span> </div>
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<div class="line"><a name="l00334"></a><span class="lineno"><a class="line" href="classXTSSingleKeyCommon.html#af150ada65640d0dcd1f5e09817f63769"> 334</a></span> <span class="keywordtype">bool</span> <a class="code" href="classXTSSingleKeyCommon.html#af150ada65640d0dcd1f5e09817f63769">XTSSingleKeyCommon::setKey</a>(<span class="keyword">const</span> uint8_t *key, <span class="keywordtype">size_t</span> len)</div>
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<div class="line"><a name="l00335"></a><span class="lineno"> 335</span> {</div>
|
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<div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  <span class="keywordflow">return</span> blockCipher1->setKey(key, len);</div>
|
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<div class="line"><a name="l00337"></a><span class="lineno"> 337</span> }</div>
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<div class="line"><a name="l00338"></a><span class="lineno"> 338</span> </div>
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<div class="ttc" id="classGF128_html_a3732c9471771c36ac1b518e974d46b3e"><div class="ttname"><a href="classGF128.html#a3732c9471771c36ac1b518e974d46b3e">GF128::dblXTS</a></div><div class="ttdeci">static void dblXTS(uint32_t V[4])</div><div class="ttdoc">Doubles a value in the GF(2^128) field using XTS conventions. </div><div class="ttdef"><b>Definition:</b> <a href="GF128_8cpp_source.html#l00497">GF128.cpp:497</a></div></div>
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<div class="ttc" id="classBlockCipher_html_ac3ba2450222aa1ea804ae4881ab6440c"><div class="ttname"><a href="classBlockCipher.html#ac3ba2450222aa1ea804ae4881ab6440c">BlockCipher::decryptBlock</a></div><div class="ttdeci">virtual void decryptBlock(uint8_t *output, const uint8_t *input)=0</div><div class="ttdoc">Decrypts a single block using this cipher. </div></div>
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<div class="ttc" id="classBlockCipher_html_aed0788b25f6bb2f1bd47d5a5f0c5db33"><div class="ttname"><a href="classBlockCipher.html#aed0788b25f6bb2f1bd47d5a5f0c5db33">BlockCipher::encryptBlock</a></div><div class="ttdeci">virtual void encryptBlock(uint8_t *output, const uint8_t *input)=0</div><div class="ttdoc">Encrypts a single block using this cipher. </div></div>
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<div class="ttc" id="classXTSSingleKeyCommon_html_af150ada65640d0dcd1f5e09817f63769"><div class="ttname"><a href="classXTSSingleKeyCommon.html#af150ada65640d0dcd1f5e09817f63769">XTSSingleKeyCommon::setKey</a></div><div class="ttdeci">bool setKey(const uint8_t *key, size_t len)</div><div class="ttdoc">Sets the key to use for single-keyh XTS mode. </div><div class="ttdef"><b>Definition:</b> <a href="XTS_8cpp_source.html#l00334">XTS.cpp:334</a></div></div>
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<div class="ttc" id="classXTSCommon_html_a744a533d46078de5ea9723139f74bcdb"><div class="ttname"><a href="classXTSCommon.html#a744a533d46078de5ea9723139f74bcdb">XTSCommon::setTweak</a></div><div class="ttdeci">bool setTweak(const uint8_t *tweak, size_t len)</div><div class="ttdoc">Sets the tweak value for the current sector to encrypt or decrypt. </div><div class="ttdef"><b>Definition:</b> <a href="XTS_8cpp_source.html#l00142">XTS.cpp:142</a></div></div>
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<div class="ttc" id="classXTSCommon_html_a7e0aa61628285073545a8f8e0b0d981d"><div class="ttname"><a href="classXTSCommon.html#a7e0aa61628285073545a8f8e0b0d981d">XTSCommon::setSectorSize</a></div><div class="ttdeci">bool setSectorSize(size_t size)</div><div class="ttdoc">Sets the size of sectors encrypted or decrypted by this class. </div><div class="ttdef"><b>Definition:</b> <a href="XTS_8cpp_source.html#l00097">XTS.cpp:97</a></div></div>
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<div class="ttc" id="classXTSCommon_html_a8bf1cbd4c1a5422a3cf285fe995fe0e7"><div class="ttname"><a href="classXTSCommon.html#a8bf1cbd4c1a5422a3cf285fe995fe0e7">XTSCommon::encryptSector</a></div><div class="ttdeci">void encryptSector(uint8_t *output, const uint8_t *input)</div><div class="ttdoc">Encrypts an entire sector of data. </div><div class="ttdef"><b>Definition:</b> <a href="XTS_8cpp_source.html#l00170">XTS.cpp:170</a></div></div>
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<div class="ttc" id="classXTSCommon_html_a96e3cb4a3d35dc4e3a5acbae19b4465b"><div class="ttname"><a href="classXTSCommon.html#a96e3cb4a3d35dc4e3a5acbae19b4465b">XTSCommon::clear</a></div><div class="ttdeci">void clear()</div><div class="ttdoc">Clears all security-sensitive state from this XTS object. </div><div class="ttdef"><b>Definition:</b> <a href="XTS_8cpp_source.html#l00266">XTS.cpp:266</a></div></div>
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<div class="ttc" id="classXTSCommon_html_afb3ebf14c7879bcbc92e3d6cc70b19a9"><div class="ttname"><a href="classXTSCommon.html#afb3ebf14c7879bcbc92e3d6cc70b19a9">XTSCommon::tweakSize</a></div><div class="ttdeci">size_t tweakSize() const </div><div class="ttdoc">Gets the maximum supported size for the tweak. </div><div class="ttdef"><b>Definition:</b> <a href="XTS_8cpp_source.html#l00073">XTS.cpp:73</a></div></div>
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<div class="ttc" id="classXTSCommon_html_a7dd21d5a994724e2af433872ecc3a90b"><div class="ttname"><a href="classXTSCommon.html#a7dd21d5a994724e2af433872ecc3a90b">XTSCommon::decryptSector</a></div><div class="ttdeci">void decryptSector(uint8_t *output, const uint8_t *input)</div><div class="ttdoc">Decrypts an entire sector of data. </div><div class="ttdef"><b>Definition:</b> <a href="XTS_8cpp_source.html#l00215">XTS.cpp:215</a></div></div>
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<div class="ttc" id="classXTSCommon_html_ae3ce2a2a72eb839f8ccde4a166ad40e6"><div class="ttname"><a href="classXTSCommon.html#ae3ce2a2a72eb839f8ccde4a166ad40e6">XTSCommon::XTSCommon</a></div><div class="ttdeci">XTSCommon()</div><div class="ttdoc">Constructs an XTS object with a default sector size of 512 bytes. </div><div class="ttdef"><b>Definition:</b> <a href="XTS_8cpp_source.html#l00041">XTS.cpp:41</a></div></div>
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<div class="ttc" id="classBlockCipher_html_a9a05307664469777592799c8f77397c4"><div class="ttname"><a href="classBlockCipher.html#a9a05307664469777592799c8f77397c4">BlockCipher::setKey</a></div><div class="ttdeci">virtual bool setKey(const uint8_t *key, size_t len)=0</div><div class="ttdoc">Sets the key to use for future encryption and decryption operations. </div></div>
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<div class="ttc" id="classXTSSingleKeyCommon_html_a0ab819b391d6e783d2dde4006440444c"><div class="ttname"><a href="classXTSSingleKeyCommon.html#a0ab819b391d6e783d2dde4006440444c">XTSSingleKeyCommon::~XTSSingleKeyCommon</a></div><div class="ttdeci">virtual ~XTSSingleKeyCommon()</div><div class="ttdoc">Clears all sensitive information and destroys this object. </div><div class="ttdef"><b>Definition:</b> <a href="XTS_8cpp_source.html#l00303">XTS.cpp:303</a></div></div>
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<div class="ttc" id="classXTSCommon_html_a68b1ad6bad0b29aeb97dea80e4e03170"><div class="ttname"><a href="classXTSCommon.html#a68b1ad6bad0b29aeb97dea80e4e03170">XTSCommon::setKey</a></div><div class="ttdeci">virtual bool setKey(const uint8_t *key, size_t len)</div><div class="ttdoc">Sets the key to use for XTS mode. </div><div class="ttdef"><b>Definition:</b> <a href="XTS_8cpp_source.html#l00119">XTS.cpp:119</a></div></div>
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<div class="ttc" id="classXTSCommon_html_a2da350825a438355665683ab9eb57aa7"><div class="ttname"><a href="classXTSCommon.html#a2da350825a438355665683ab9eb57aa7">XTSCommon::keySize</a></div><div class="ttdeci">virtual size_t keySize() const </div><div class="ttdoc">Gets the size of the key for XTS mode. </div><div class="ttdef"><b>Definition:</b> <a href="XTS_8cpp_source.html#l00062">XTS.cpp:62</a></div></div>
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<div class="ttc" id="classXTSCommon_html_ac5398f0bd2201e7d3fa335899fb3c6f3"><div class="ttname"><a href="classXTSCommon.html#ac5398f0bd2201e7d3fa335899fb3c6f3">XTSCommon::~XTSCommon</a></div><div class="ttdeci">virtual ~XTSCommon()</div><div class="ttdoc">Clears all sensitive information and destroys this object. </div><div class="ttdef"><b>Definition:</b> <a href="XTS_8cpp_source.html#l00049">XTS.cpp:49</a></div></div>
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<div class="ttc" id="classXTSSingleKeyCommon_html_ac017d457a08001a3ea44a9900dee2b64"><div class="ttname"><a href="classXTSSingleKeyCommon.html#ac017d457a08001a3ea44a9900dee2b64">XTSSingleKeyCommon::keySize</a></div><div class="ttdeci">size_t keySize() const </div><div class="ttdoc">Gets the size of the key for single-pkey XTS mode. </div><div class="ttdef"><b>Definition:</b> <a href="XTS_8cpp_source.html#l00315">XTS.cpp:315</a></div></div>
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<div class="ttc" id="classBlockCipher_html_a6f27d46e9dfa7761d014d828ad5f955b"><div class="ttname"><a href="classBlockCipher.html#a6f27d46e9dfa7761d014d828ad5f955b">BlockCipher::clear</a></div><div class="ttdeci">virtual void clear()=0</div><div class="ttdoc">Clears all security-sensitive state from this block cipher. </div></div>
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<div class="ttc" id="classBlockCipher_html_afde6004a859e015d877eab3c37042a0f"><div class="ttname"><a href="classBlockCipher.html#afde6004a859e015d877eab3c37042a0f">BlockCipher::keySize</a></div><div class="ttdeci">virtual size_t keySize() const =0</div><div class="ttdoc">Default size of the key for this block cipher, in bytes. </div></div>
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