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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span>&#160;<span class="comment">/*</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span>&#160;<span class="comment"> * Copyright (C) 2015 Southern Storm Software, Pty Ltd.</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span>&#160;<span class="comment"> * Permission is hereby granted, free of charge, to any person obtaining a</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span>&#160;<span class="comment"> * copy of this software and associated documentation files (the &quot;Software&quot;),</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span>&#160;<span class="comment"> * to deal in the Software without restriction, including without limitation</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span>&#160;<span class="comment"> * the rights to use, copy, modify, merge, publish, distribute, sublicense,</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span>&#160;<span class="comment"> * and/or sell copies of the Software, and to permit persons to whom the</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span>&#160;<span class="comment"> * Software is furnished to do so, subject to the following conditions:</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span>&#160;<span class="comment"> * The above copyright notice and this permission notice shall be included</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span>&#160;<span class="comment"> * in all copies or substantial portions of the Software.</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span>&#160;<span class="comment"> * THE SOFTWARE IS PROVIDED &quot;AS IS&quot;, WITHOUT WARRANTY OF ANY KIND, EXPRESS</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span>&#160;<span class="comment"> * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span>&#160;<span class="comment"> * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span>&#160;<span class="comment"> * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span>&#160;<span class="comment"> * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span>&#160;<span class="comment"> * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span>&#160;<span class="comment"> * DEALINGS IN THE SOFTWARE.</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span>&#160;</div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span>&#160;<span class="preprocessor">#ifndef CRYPTO_CFB_h</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define CRYPTO_CFB_h</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span>&#160;<span class="preprocessor">#include &quot;Cipher.h&quot;</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span>&#160;<span class="preprocessor">#include &quot;BlockCipher.h&quot;</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span>&#160;</div>
<div class="line"><a name="l00029"></a><span class="lineno"><a class="line" href="classCFBCommon.html"> 29</a></span>&#160;<span class="keyword">class </span><a class="code" href="classCFBCommon.html">CFBCommon</a> : <span class="keyword">public</span> <a class="code" href="classCipher.html">Cipher</a></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160;{</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160;<span class="keyword">public</span>:</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>&#160; <span class="keyword">virtual</span> <a class="code" href="classCFBCommon.html#ae200d7b876a1f154bcdb1cdf33d3be54">~CFBCommon</a>();</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>&#160;</div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160; <span class="keywordtype">size_t</span> <a class="code" href="classCFBCommon.html#a82899da983bc70bc8152ee67f424552e">keySize</a>() <span class="keyword">const</span>;</div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160; <span class="keywordtype">size_t</span> <a class="code" href="classCFBCommon.html#a55db1be69de87aafe5601d31be918ebb">ivSize</a>() <span class="keyword">const</span>;</div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160;</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160; <span class="keywordtype">bool</span> <a class="code" href="classCFBCommon.html#a45b9be25fb96f0e3ca5211b064e2baea">setKey</a>(<span class="keyword">const</span> uint8_t *key, <span class="keywordtype">size_t</span> len);</div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160; <span class="keywordtype">bool</span> <a class="code" href="classCFBCommon.html#a597040eb7df40adbbef94b4c3975cd80">setIV</a>(<span class="keyword">const</span> uint8_t *iv, <span class="keywordtype">size_t</span> len);</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>&#160;</div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>&#160; <span class="keywordtype">void</span> <a class="code" href="classCFBCommon.html#a57af3692389bed300d3cfdf351351c51">encrypt</a>(uint8_t *output, <span class="keyword">const</span> uint8_t *input, <span class="keywordtype">size_t</span> len);</div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>&#160; <span class="keywordtype">void</span> <a class="code" href="classCFBCommon.html#aaaa3d61c5743e30e355207c193c0b0ef">decrypt</a>(uint8_t *output, <span class="keyword">const</span> uint8_t *input, <span class="keywordtype">size_t</span> len);</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span>&#160;</div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>&#160; <span class="keywordtype">void</span> <a class="code" href="classCFBCommon.html#a847d320b0fe7f329385f26511b42c40d">clear</a>();</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160;</div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>&#160;<span class="keyword">protected</span>:</div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160; <a class="code" href="classCFBCommon.html#adad0210430c83817c993bdca30d562a6">CFBCommon</a>();</div>
<div class="line"><a name="l00047"></a><span class="lineno"><a class="line" href="classCFBCommon.html#a9161530f456efacb64f5008fdb1a460c"> 47</a></span>&#160; <span class="keywordtype">void</span> <a class="code" href="classCFBCommon.html#a9161530f456efacb64f5008fdb1a460c">setBlockCipher</a>(<a class="code" href="classBlockCipher.html">BlockCipher</a> *cipher) { blockCipher = cipher; }</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160;</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160;<span class="keyword">private</span>:</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160; <a class="code" href="classBlockCipher.html">BlockCipher</a> *blockCipher;</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160; uint8_t iv[16];</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>&#160; uint8_t posn;</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>&#160;};</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>&#160;</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160;<span class="keyword">template</span> &lt;<span class="keyword">typename</span> T&gt;</div>
<div class="line"><a name="l00056"></a><span class="lineno"><a class="line" href="classCFB.html"> 56</a></span>&#160;<span class="keyword">class </span><a class="code" href="classCFB.html">CFB</a> : <span class="keyword">public</span> <a class="code" href="classCFBCommon.html">CFBCommon</a></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160;{</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>&#160;<span class="keyword">public</span>:</div>
<div class="line"><a name="l00059"></a><span class="lineno"><a class="line" href="classCFB.html#a26a027614d027162c67085a58b512318"> 59</a></span>&#160; <a class="code" href="classCFB.html#a26a027614d027162c67085a58b512318">CFB</a>() { <a class="code" href="classCFBCommon.html#a9161530f456efacb64f5008fdb1a460c">setBlockCipher</a>(&amp;cipher); }</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>&#160;</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>&#160;<span class="keyword">private</span>:</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>&#160; T cipher;</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>&#160;};</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>&#160;</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>&#160;<span class="preprocessor">#endif</span></div>
<div class="ttc" id="classCipher_html"><div class="ttname"><a href="classCipher.html">Cipher</a></div><div class="ttdoc">Abstract base class for stream ciphers. </div><div class="ttdef"><b>Definition:</b> <a href="Cipher_8h_source.html#l00029">Cipher.h:29</a></div></div>
<div class="ttc" id="classCFBCommon_html_a45b9be25fb96f0e3ca5211b064e2baea"><div class="ttname"><a href="classCFBCommon.html#a45b9be25fb96f0e3ca5211b064e2baea">CFBCommon::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="CFB_8cpp_source.html#l00066">CFB.cpp:66</a></div></div>
<div class="ttc" id="classCFBCommon_html_a82899da983bc70bc8152ee67f424552e"><div class="ttname"><a href="classCFBCommon.html#a82899da983bc70bc8152ee67f424552e">CFBCommon::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="CFB_8cpp_source.html#l00056">CFB.cpp:56</a></div></div>
<div class="ttc" id="classCFB_html_a26a027614d027162c67085a58b512318"><div class="ttname"><a href="classCFB.html#a26a027614d027162c67085a58b512318">CFB::CFB</a></div><div class="ttdeci">CFB()</div><div class="ttdoc">Constructs a new CFB object for the block cipher T. </div><div class="ttdef"><b>Definition:</b> <a href="CFB_8h_source.html#l00059">CFB.h:59</a></div></div>
<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>
<div class="ttc" id="classCFB_html"><div class="ttname"><a href="classCFB.html">CFB</a></div><div class="ttdoc">Implementation of the Cipher Feedback (CFB) mode for 128-bit block ciphers. </div><div class="ttdef"><b>Definition:</b> <a href="CFB_8h_source.html#l00056">CFB.h:56</a></div></div>
<div class="ttc" id="classCFBCommon_html_a55db1be69de87aafe5601d31be918ebb"><div class="ttname"><a href="classCFBCommon.html#a55db1be69de87aafe5601d31be918ebb">CFBCommon::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="CFB_8cpp_source.html#l00061">CFB.cpp:61</a></div></div>
<div class="ttc" id="classCFBCommon_html_ae200d7b876a1f154bcdb1cdf33d3be54"><div class="ttname"><a href="classCFBCommon.html#ae200d7b876a1f154bcdb1cdf33d3be54">CFBCommon::~CFBCommon</a></div><div class="ttdeci">virtual ~CFBCommon()</div><div class="ttdoc">Destroys this cipher object after clearing sensitive information. </div><div class="ttdef"><b>Definition:</b> <a href="CFB_8cpp_source.html#l00051">CFB.cpp:51</a></div></div>
<div class="ttc" id="classCFBCommon_html"><div class="ttname"><a href="classCFBCommon.html">CFBCommon</a></div><div class="ttdoc">Concrete base class to assist with implementing CFB for 128-bit block ciphers. </div><div class="ttdef"><b>Definition:</b> <a href="CFB_8h_source.html#l00029">CFB.h:29</a></div></div>
<div class="ttc" id="classCFBCommon_html_a597040eb7df40adbbef94b4c3975cd80"><div class="ttname"><a href="classCFBCommon.html#a597040eb7df40adbbef94b4c3975cd80">CFBCommon::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="CFB_8cpp_source.html#l00076">CFB.cpp:76</a></div></div>
<div class="ttc" id="classCFBCommon_html_a9161530f456efacb64f5008fdb1a460c"><div class="ttname"><a href="classCFBCommon.html#a9161530f456efacb64f5008fdb1a460c">CFBCommon::setBlockCipher</a></div><div class="ttdeci">void setBlockCipher(BlockCipher *cipher)</div><div class="ttdoc">Sets the block cipher to use for this CFB object. </div><div class="ttdef"><b>Definition:</b> <a href="CFB_8h_source.html#l00047">CFB.h:47</a></div></div>
<div class="ttc" id="classCFBCommon_html_adad0210430c83817c993bdca30d562a6"><div class="ttname"><a href="classCFBCommon.html#adad0210430c83817c993bdca30d562a6">CFBCommon::CFBCommon</a></div><div class="ttdeci">CFBCommon()</div><div class="ttdoc">Constructs a new cipher in CFB mode. </div><div class="ttdef"><b>Definition:</b> <a href="CFB_8cpp_source.html#l00042">CFB.cpp:42</a></div></div>
<div class="ttc" id="classCFBCommon_html_a57af3692389bed300d3cfdf351351c51"><div class="ttname"><a href="classCFBCommon.html#a57af3692389bed300d3cfdf351351c51">CFBCommon::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="CFB_8cpp_source.html#l00085">CFB.cpp:85</a></div></div>
<div class="ttc" id="classCFBCommon_html_a847d320b0fe7f329385f26511b42c40d"><div class="ttname"><a href="classCFBCommon.html#a847d320b0fe7f329385f26511b42c40d">CFBCommon::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="CFB_8cpp_source.html#l00140">CFB.cpp:140</a></div></div>
<div class="ttc" id="classCFBCommon_html_aaaa3d61c5743e30e355207c193c0b0ef"><div class="ttname"><a href="classCFBCommon.html#aaaa3d61c5743e30e355207c193c0b0ef">CFBCommon::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="CFB_8cpp_source.html#l00112">CFB.cpp:112</a></div></div>
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