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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">EAX.h</div> </div>
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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">#ifndef CRYPTO_EAX_h</span></div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor"></span><span class="preprocessor">#define CRYPTO_EAX_h</span></div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor"></span></div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include "AuthenticatedCipher.h"</span></div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor">#include "BlockCipher.h"</span></div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#include "OMAC.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="l00030"></a><span class="lineno"><a class="line" href="classEAXCommon.html"> 30</a></span> <span class="keyword">class </span><a class="code" href="classEAXCommon.html">EAXCommon</a> : <span class="keyword">public</span> <a class="code" href="classAuthenticatedCipher.html">AuthenticatedCipher</a></div>
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<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> {</div>
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<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="keyword">public</span>:</div>
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<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  <span class="keyword">virtual</span> ~<a class="code" href="classEAXCommon.html">EAXCommon</a>();</div>
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<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> </div>
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<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <span class="keywordtype">size_t</span> <a class="code" href="classEAXCommon.html#a027956913eecfa0bc760f20f3b62df29">keySize</a>() <span class="keyword">const</span>;</div>
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<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  <span class="keywordtype">size_t</span> <a class="code" href="classEAXCommon.html#abc6ccfb9338c94699458723f669513bf">ivSize</a>() <span class="keyword">const</span>;</div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="keywordtype">size_t</span> <a class="code" href="classEAXCommon.html#a8804341b21f752a5b8178a3bdb123fd9">tagSize</a>() <span class="keyword">const</span>;</div>
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<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> </div>
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<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <span class="keywordtype">bool</span> <a class="code" href="classEAXCommon.html#af5be5115c119610abb351028263d28de">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="l00040"></a><span class="lineno"> 40</span>  <span class="keywordtype">bool</span> <a class="code" href="classEAXCommon.html#a33a5da1f210f01c3622fbf27208f3d45">setIV</a>(<span class="keyword">const</span> uint8_t *iv, <span class="keywordtype">size_t</span> len);</div>
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<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> </div>
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<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <span class="keywordtype">void</span> <a class="code" href="classEAXCommon.html#aad2c563f749535f539b8efbd74b09099">encrypt</a>(uint8_t *output, <span class="keyword">const</span> uint8_t *input, <span class="keywordtype">size_t</span> len);</div>
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<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="keywordtype">void</span> <a class="code" href="classEAXCommon.html#a63ce8ae45db137ec9d447216b84245c2">decrypt</a>(uint8_t *output, <span class="keyword">const</span> uint8_t *input, <span class="keywordtype">size_t</span> len);</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>  <span class="keywordtype">void</span> <a class="code" href="classEAXCommon.html#acdf2c51fb11c068202311b5c95767db8">addAuthData</a>(<span class="keyword">const</span> <span class="keywordtype">void</span> *data, <span class="keywordtype">size_t</span> len);</div>
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<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> </div>
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<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  <span class="keywordtype">void</span> <a class="code" href="classEAXCommon.html#ab5a61bba48561d6e7e6b8bafc51d91e3">computeTag</a>(<span class="keywordtype">void</span> *tag, <span class="keywordtype">size_t</span> len);</div>
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<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keywordtype">bool</span> <a class="code" href="classEAXCommon.html#a72c403f52cefab57566bc5f634c1b963">checkTag</a>(<span class="keyword">const</span> <span class="keywordtype">void</span> *tag, <span class="keywordtype">size_t</span> len);</div>
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<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> </div>
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<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keywordtype">void</span> <a class="code" href="classEAXCommon.html#afa88b0f589e09103e9c69ace081db0af">clear</a>();</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> <span class="keyword">protected</span>:</div>
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<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <a class="code" href="classEAXCommon.html#ae09c9df956bf87cde02ca36c26c32f79">EAXCommon</a>();</div>
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<div class="line"><a name="l00054"></a><span class="lineno"><a class="line" href="classEAXCommon.html#a7db44040163b33f818cfaf47185251ca"> 54</a></span>  <span class="keywordtype">void</span> <a class="code" href="classEAXCommon.html#a7db44040163b33f818cfaf47185251ca">setBlockCipher</a>(<a class="code" href="classBlockCipher.html">BlockCipher</a> *cipher)</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>  omac.<a class="code" href="classOMAC.html#a8ae86bc629cca60cebb995d092ba06b4">setBlockCipher</a>(cipher);</div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  }</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> </div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="keyword">private</span>:</div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <span class="keyword">struct </span>{</div>
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<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  uint8_t counter[16];</div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  uint8_t stream[16];</div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  uint8_t tag[16];</div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  uint8_t hash[16];</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  uint8_t encPosn;</div>
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<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  uint8_t authMode;</div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  } state;</div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <a class="code" href="classOMAC.html">OMAC</a> omac;</div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> </div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keywordtype">void</span> closeAuthData();</div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="keywordtype">void</span> encryptCTR(uint8_t *output, <span class="keyword">const</span> uint8_t *input, <span class="keywordtype">size_t</span> len);</div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keywordtype">void</span> closeTag();</div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> };</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> <span class="keyword">template</span> <<span class="keyword">typename</span> T></div>
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<div class="line"><a name="l00076"></a><span class="lineno"><a class="line" href="classEAX.html"> 76</a></span> <span class="keyword">class </span><a class="code" href="classEAX.html">EAX</a> : <span class="keyword">public</span> <a class="code" href="classEAXCommon.html">EAXCommon</a></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="l00078"></a><span class="lineno"> 78</span> <span class="keyword">public</span>:</div>
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<div class="line"><a name="l00079"></a><span class="lineno"><a class="line" href="classEAX.html#a7a1f89270e885a1ca245ca978b66e09b"> 79</a></span>  <a class="code" href="classEAX.html#a7a1f89270e885a1ca245ca978b66e09b">EAX</a>() { <a class="code" href="classEAXCommon.html#a7db44040163b33f818cfaf47185251ca">setBlockCipher</a>(&cipher); }</div>
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<div class="line"><a name="l00080"></a><span class="lineno"> 80</span> </div>
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<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="keyword">private</span>:</div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  T cipher;</div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> };</div>
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<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> </div>
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<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="preprocessor">#endif</span></div>
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<div class="ttc" id="classOMAC_html"><div class="ttname"><a href="classOMAC.html">OMAC</a></div><div class="ttdoc">Implementation of the OMAC message authenticator. </div><div class="ttdef"><b>Definition:</b> <a href="OMAC_8h_source.html#l00028">OMAC.h:28</a></div></div>
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<div class="ttc" id="classEAXCommon_html_a33a5da1f210f01c3622fbf27208f3d45"><div class="ttname"><a href="classEAXCommon.html#a33a5da1f210f01c3622fbf27208f3d45">EAXCommon::setIV</a></div><div class="ttdeci">bool setIV(const uint8_t *iv, size_t len)</div><div class="ttdoc">Sets the initialization vector to use for future encryption and decryption operations. </div><div class="ttdef"><b>Definition:</b> <a href="EAX_8cpp_source.html#l00076">EAX.cpp:76</a></div></div>
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<div class="ttc" id="classBlockCipher_html"><div class="ttname"><a href="classBlockCipher.html">BlockCipher</a></div><div class="ttdoc">Abstract base class for block ciphers. </div><div class="ttdef"><b>Definition:</b> <a href="BlockCipher_8h_source.html#l00029">BlockCipher.h:29</a></div></div>
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<div class="ttc" id="classEAXCommon_html_a63ce8ae45db137ec9d447216b84245c2"><div class="ttname"><a href="classEAXCommon.html#a63ce8ae45db137ec9d447216b84245c2">EAXCommon::decrypt</a></div><div class="ttdeci">void decrypt(uint8_t *output, const uint8_t *input, size_t len)</div><div class="ttdoc">Decrypts an input buffer and writes the plaintext to an output buffer. </div><div class="ttdef"><b>Definition:</b> <a href="EAX_8cpp_source.html#l00108">EAX.cpp:108</a></div></div>
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<div class="ttc" id="classAuthenticatedCipher_html"><div class="ttname"><a href="classAuthenticatedCipher.html">AuthenticatedCipher</a></div><div class="ttdoc">Abstract base class for authenticated ciphers. </div><div class="ttdef"><b>Definition:</b> <a href="AuthenticatedCipher_8h_source.html#l00028">AuthenticatedCipher.h:28</a></div></div>
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<div class="ttc" id="classEAXCommon_html_a8804341b21f752a5b8178a3bdb123fd9"><div class="ttname"><a href="classEAXCommon.html#a8804341b21f752a5b8178a3bdb123fd9">EAXCommon::tagSize</a></div><div class="ttdeci">size_t tagSize() const </div><div class="ttdoc">Returns the size of the authentication tag. </div><div class="ttdef"><b>Definition:</b> <a href="EAX_8cpp_source.html#l00065">EAX.cpp:65</a></div></div>
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<div class="ttc" id="classEAXCommon_html_ae09c9df956bf87cde02ca36c26c32f79"><div class="ttname"><a href="classEAXCommon.html#ae09c9df956bf87cde02ca36c26c32f79">EAXCommon::EAXCommon</a></div><div class="ttdeci">EAXCommon()</div><div class="ttdoc">Constructs a new cipher in EAX mode. </div><div class="ttdef"><b>Definition:</b> <a href="EAX_8cpp_source.html#l00043">EAX.cpp:43</a></div></div>
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<div class="ttc" id="classOMAC_html_a8ae86bc629cca60cebb995d092ba06b4"><div class="ttname"><a href="classOMAC.html#a8ae86bc629cca60cebb995d092ba06b4">OMAC::setBlockCipher</a></div><div class="ttdeci">void setBlockCipher(BlockCipher *cipher)</div><div class="ttdoc">Sets the block cipher to use for this OMAC object. </div><div class="ttdef"><b>Definition:</b> <a href="OMAC_8h_source.html#l00035">OMAC.h:35</a></div></div>
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<div class="ttc" id="classEAXCommon_html_a72c403f52cefab57566bc5f634c1b963"><div class="ttname"><a href="classEAXCommon.html#a72c403f52cefab57566bc5f634c1b963">EAXCommon::checkTag</a></div><div class="ttdeci">bool checkTag(const void *tag, size_t len)</div><div class="ttdoc">Finalizes the decryption process and checks the authentication tag. </div><div class="ttdef"><b>Definition:</b> <a href="EAX_8cpp_source.html#l00130">EAX.cpp:130</a></div></div>
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<div class="ttc" id="classEAXCommon_html"><div class="ttname"><a href="classEAXCommon.html">EAXCommon</a></div><div class="ttdoc">Concrete base class to assist with implementing EAX for 128-bit block ciphers. </div><div class="ttdef"><b>Definition:</b> <a href="EAX_8h_source.html#l00030">EAX.h:30</a></div></div>
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<div class="ttc" id="classEAX_html_a7a1f89270e885a1ca245ca978b66e09b"><div class="ttname"><a href="classEAX.html#a7a1f89270e885a1ca245ca978b66e09b">EAX::EAX</a></div><div class="ttdeci">EAX()</div><div class="ttdoc">Constructs a new EAX object for the block cipher T. </div><div class="ttdef"><b>Definition:</b> <a href="EAX_8h_source.html#l00079">EAX.h:79</a></div></div>
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<div class="ttc" id="classEAXCommon_html_aad2c563f749535f539b8efbd74b09099"><div class="ttname"><a href="classEAXCommon.html#aad2c563f749535f539b8efbd74b09099">EAXCommon::encrypt</a></div><div class="ttdeci">void encrypt(uint8_t *output, const uint8_t *input, size_t len)</div><div class="ttdoc">Encrypts an input buffer and writes the ciphertext to an output buffer. </div><div class="ttdef"><b>Definition:</b> <a href="EAX_8cpp_source.html#l00100">EAX.cpp:100</a></div></div>
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<div class="ttc" id="classEAXCommon_html_afa88b0f589e09103e9c69ace081db0af"><div class="ttname"><a href="classEAXCommon.html#afa88b0f589e09103e9c69ace081db0af">EAXCommon::clear</a></div><div class="ttdeci">void clear()</div><div class="ttdoc">Clears all security-sensitive state from this cipher. </div><div class="ttdef"><b>Definition:</b> <a href="EAX_8cpp_source.html#l00141">EAX.cpp:141</a></div></div>
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<div class="ttc" id="classEAXCommon_html_af5be5115c119610abb351028263d28de"><div class="ttname"><a href="classEAXCommon.html#af5be5115c119610abb351028263d28de">EAXCommon::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 future encryption and decryption operations. </div><div class="ttdef"><b>Definition:</b> <a href="EAX_8cpp_source.html#l00071">EAX.cpp:71</a></div></div>
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<div class="ttc" id="classEAXCommon_html_ab5a61bba48561d6e7e6b8bafc51d91e3"><div class="ttname"><a href="classEAXCommon.html#ab5a61bba48561d6e7e6b8bafc51d91e3">EAXCommon::computeTag</a></div><div class="ttdeci">void computeTag(void *tag, size_t len)</div><div class="ttdoc">Finalizes the encryption process and computes the authentication tag. </div><div class="ttdef"><b>Definition:</b> <a href="EAX_8cpp_source.html#l00122">EAX.cpp:122</a></div></div>
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<div class="ttc" id="classEAX_html"><div class="ttname"><a href="classEAX.html">EAX</a></div><div class="ttdoc">Implementation of the EAX authenticated cipher. </div><div class="ttdef"><b>Definition:</b> <a href="EAX_8h_source.html#l00076">EAX.h:76</a></div></div>
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<div class="ttc" id="classEAXCommon_html_a7db44040163b33f818cfaf47185251ca"><div class="ttname"><a href="classEAXCommon.html#a7db44040163b33f818cfaf47185251ca">EAXCommon::setBlockCipher</a></div><div class="ttdeci">void setBlockCipher(BlockCipher *cipher)</div><div class="ttdoc">Sets the block cipher to use for this EAX object. </div><div class="ttdef"><b>Definition:</b> <a href="EAX_8h_source.html#l00054">EAX.h:54</a></div></div>
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<div class="ttc" id="classEAXCommon_html_abc6ccfb9338c94699458723f669513bf"><div class="ttname"><a href="classEAXCommon.html#abc6ccfb9338c94699458723f669513bf">EAXCommon::ivSize</a></div><div class="ttdeci">size_t ivSize() const </div><div class="ttdoc">Size of the initialization vector for this cipher, in bytes. </div><div class="ttdef"><b>Definition:</b> <a href="EAX_8cpp_source.html#l00059">EAX.cpp:59</a></div></div>
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<div class="ttc" id="classEAXCommon_html_acdf2c51fb11c068202311b5c95767db8"><div class="ttname"><a href="classEAXCommon.html#acdf2c51fb11c068202311b5c95767db8">EAXCommon::addAuthData</a></div><div class="ttdeci">void addAuthData(const void *data, size_t len)</div><div class="ttdoc">Adds extra data that will be authenticated but not encrypted. </div><div class="ttdef"><b>Definition:</b> <a href="EAX_8cpp_source.html#l00116">EAX.cpp:116</a></div></div>
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<div class="ttc" id="classEAXCommon_html_a027956913eecfa0bc760f20f3b62df29"><div class="ttname"><a href="classEAXCommon.html#a027956913eecfa0bc760f20f3b62df29">EAXCommon::keySize</a></div><div class="ttdeci">size_t keySize() const </div><div class="ttdoc">Default size of the key for this cipher, in bytes. </div><div class="ttdef"><b>Definition:</b> <a href="EAX_8cpp_source.html#l00054">EAX.cpp:54</a></div></div>
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