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<div class="title">Hash.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) 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 "Hash.h"</span></div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include <string.h></span></div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> </div>
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<div class="line"><a name="l00036"></a><span class="lineno"><a class="line" href="classHash.html#af482880ad75b67a09d2dcb5e86244d80"> 36</a></span> <a class="code" href="classHash.html#af482880ad75b67a09d2dcb5e86244d80">Hash::Hash</a>()</div>
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<div class="line"><a name="l00037"></a><span class="lineno"> 37</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> </div>
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<div class="line"><a name="l00048"></a><span class="lineno"><a class="line" href="classHash.html#a4e4b4797dda8678aaed058bae155813e"> 48</a></span> <a class="code" href="classHash.html#a4e4b4797dda8678aaed058bae155813e">Hash::~Hash</a>()</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> }</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="l00162"></a><span class="lineno"><a class="line" href="classHash.html#ab6f40c9af91dc3d738d9fcce59af63cc"> 162</a></span> <span class="keywordtype">void</span> <a class="code" href="classHash.html#ab6f40c9af91dc3d738d9fcce59af63cc">Hash::formatHMACKey</a>(<span class="keywordtype">void</span> *block, <span class="keyword">const</span> <span class="keywordtype">void</span> *key, <span class="keywordtype">size_t</span> len, uint8_t pad)</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="l00164"></a><span class="lineno"> 164</span>  <span class="keywordtype">size_t</span> size = <a class="code" href="classHash.html#a4e4297812e3483410556830fe5d47bdf">blockSize</a>();</div>
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<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  <a class="code" href="classHash.html#a7b94309acaa5f52386785fb780e5be61">reset</a>();</div>
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<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  <span class="keywordflow">if</span> (len <= size) {</div>
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<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  memcpy(block, key, len);</div>
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<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  <a class="code" href="classHash.html#aec9761ee427d122e7450de8df200265c">update</a>(key, len);</div>
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<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  len = <a class="code" href="classHash.html#adcdd30de3e5ecaa2f798c0c5644d9ef8">hashSize</a>();</div>
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<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  <a class="code" href="classHash.html#a09b3ccec22763fc86b1415695862977c">finalize</a>(block, len);</div>
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<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  <a class="code" href="classHash.html#a7b94309acaa5f52386785fb780e5be61">reset</a>();</div>
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<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  }</div>
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<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  uint8_t *b = (uint8_t *)block;</div>
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<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  memset(b + len, pad, size - len);</div>
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<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  <span class="keywordflow">while</span> (len > 0) {</div>
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<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  *b++ ^= pad;</div>
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<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  --len;</div>
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<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  }</div>
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<div class="line"><a name="l00180"></a><span class="lineno"> 180</span> }</div>
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<div class="ttc" id="classHash_html_a4e4297812e3483410556830fe5d47bdf"><div class="ttname"><a href="classHash.html#a4e4297812e3483410556830fe5d47bdf">Hash::blockSize</a></div><div class="ttdeci">virtual size_t blockSize() const =0</div><div class="ttdoc">Size of the internal block used by the hash algorithm. </div></div>
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<div class="ttc" id="classHash_html_af482880ad75b67a09d2dcb5e86244d80"><div class="ttname"><a href="classHash.html#af482880ad75b67a09d2dcb5e86244d80">Hash::Hash</a></div><div class="ttdeci">Hash()</div><div class="ttdoc">Constructs a new hash object. </div><div class="ttdef"><b>Definition:</b> <a href="Hash_8cpp_source.html#l00036">Hash.cpp:36</a></div></div>
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<div class="ttc" id="classHash_html_a7b94309acaa5f52386785fb780e5be61"><div class="ttname"><a href="classHash.html#a7b94309acaa5f52386785fb780e5be61">Hash::reset</a></div><div class="ttdeci">virtual void reset()=0</div><div class="ttdoc">Resets the hash ready for a new hashing process. </div></div>
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<div class="ttc" id="classHash_html_adcdd30de3e5ecaa2f798c0c5644d9ef8"><div class="ttname"><a href="classHash.html#adcdd30de3e5ecaa2f798c0c5644d9ef8">Hash::hashSize</a></div><div class="ttdeci">virtual size_t hashSize() const =0</div><div class="ttdoc">Size of the hash result from finalize(). </div></div>
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<div class="ttc" id="classHash_html_a4e4b4797dda8678aaed058bae155813e"><div class="ttname"><a href="classHash.html#a4e4b4797dda8678aaed058bae155813e">Hash::~Hash</a></div><div class="ttdeci">virtual ~Hash()</div><div class="ttdoc">Destroys this hash object. </div><div class="ttdef"><b>Definition:</b> <a href="Hash_8cpp_source.html#l00048">Hash.cpp:48</a></div></div>
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<div class="ttc" id="classHash_html_aec9761ee427d122e7450de8df200265c"><div class="ttname"><a href="classHash.html#aec9761ee427d122e7450de8df200265c">Hash::update</a></div><div class="ttdeci">virtual void update(const void *data, size_t len)=0</div><div class="ttdoc">Updates the hash with more data. </div></div>
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<div class="ttc" id="classHash_html_ab6f40c9af91dc3d738d9fcce59af63cc"><div class="ttname"><a href="classHash.html#ab6f40c9af91dc3d738d9fcce59af63cc">Hash::formatHMACKey</a></div><div class="ttdeci">void formatHMACKey(void *block, const void *key, size_t len, uint8_t pad)</div><div class="ttdoc">Formats a HMAC key into a block. </div><div class="ttdef"><b>Definition:</b> <a href="Hash_8cpp_source.html#l00162">Hash.cpp:162</a></div></div>
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<div class="ttc" id="classHash_html_a09b3ccec22763fc86b1415695862977c"><div class="ttname"><a href="classHash.html#a09b3ccec22763fc86b1415695862977c">Hash::finalize</a></div><div class="ttdeci">virtual void finalize(void *hash, size_t len)=0</div><div class="ttdoc">Finalizes the hashing process and returns the hash. </div></div>
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