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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">SHA256.cpp</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">#include "SHA256.h"</span></div>
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<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include "Crypto.h"</span></div>
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<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include "utility/RotateUtil.h"</span></div>
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<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#include "utility/EndianUtil.h"</span></div>
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<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor">#include "utility/ProgMemUtil.h"</span></div>
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<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#include <string.h></span></div>
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<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> </div>
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<div class="line"><a name="l00042"></a><span class="lineno"><a class="line" href="classSHA256.html#ab672831c542df07ff03ded25760feec2"> 42</a></span> <a class="code" href="classSHA256.html#ab672831c542df07ff03ded25760feec2">SHA256::SHA256</a>()</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>  <a class="code" href="classSHA256.html#ad9d80d8fdccffb15497bd36285afce65">reset</a>();</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="l00046"></a><span class="lineno"> 46</span> </div>
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<div class="line"><a name="l00051"></a><span class="lineno"><a class="line" href="classSHA256.html#ad82f2925b612de315b289017e023a73b"> 51</a></span> <a class="code" href="classSHA256.html#ad82f2925b612de315b289017e023a73b">SHA256::~SHA256</a>()</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>  clean(state);</div>
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<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> }</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"><a class="line" href="classSHA256.html#a103d5bc5ced792464a82cb1d7986de94"> 56</a></span> <span class="keywordtype">size_t</span> <a class="code" href="classSHA256.html#a103d5bc5ced792464a82cb1d7986de94">SHA256::hashSize</a>()<span class="keyword"> const</span></div>
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<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="keyword"></span>{</div>
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<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  <span class="keywordflow">return</span> 32;</div>
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<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> }</div>
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<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> </div>
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<div class="line"><a name="l00061"></a><span class="lineno"><a class="line" href="classSHA256.html#a71bbd9064f9d6191d0647f867953a858"> 61</a></span> <span class="keywordtype">size_t</span> <a class="code" href="classSHA256.html#a71bbd9064f9d6191d0647f867953a858">SHA256::blockSize</a>()<span class="keyword"> const</span></div>
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<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="keyword"></span>{</div>
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<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keywordflow">return</span> 64;</div>
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<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> }</div>
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<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> </div>
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<div class="line"><a name="l00066"></a><span class="lineno"><a class="line" href="classSHA256.html#ad9d80d8fdccffb15497bd36285afce65"> 66</a></span> <span class="keywordtype">void</span> <a class="code" href="classSHA256.html#ad9d80d8fdccffb15497bd36285afce65">SHA256::reset</a>()</div>
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<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> {</div>
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<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  state.h[0] = 0x6a09e667;</div>
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<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  state.h[1] = 0xbb67ae85;</div>
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<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  state.h[2] = 0x3c6ef372;</div>
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<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  state.h[3] = 0xa54ff53a,</div>
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<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  state.h[4] = 0x510e527f;</div>
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<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  state.h[5] = 0x9b05688c;</div>
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<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  state.h[6] = 0x1f83d9ab;</div>
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<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  state.h[7] = 0x5be0cd19;</div>
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<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  state.chunkSize = 0;</div>
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<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  state.length = 0;</div>
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<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> }</div>
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<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> </div>
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<div class="line"><a name="l00080"></a><span class="lineno"><a class="line" href="classSHA256.html#a555bf8efb17afd4842d2e55a1f39f27b"> 80</a></span> <span class="keywordtype">void</span> <a class="code" href="classSHA256.html#a555bf8efb17afd4842d2e55a1f39f27b">SHA256::update</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="l00081"></a><span class="lineno"> 81</span> {</div>
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<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="comment">// Update the total length (in bits, not bytes).</span></div>
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<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  state.length += ((uint64_t)len) << 3;</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="comment">// Break the input up into 512-bit chunks and process each in turn.</span></div>
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<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="keyword">const</span> uint8_t *d = (<span class="keyword">const</span> uint8_t *)data;</div>
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<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keywordflow">while</span> (len > 0) {</div>
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<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  uint8_t size = 64 - state.chunkSize;</div>
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<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="keywordflow">if</span> (size > len)</div>
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<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  size = len;</div>
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<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  memcpy(((uint8_t *)state.w) + state.chunkSize, d, size);</div>
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<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  state.chunkSize += size;</div>
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<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  len -= size;</div>
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<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  d += size;</div>
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<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  <span class="keywordflow">if</span> (state.chunkSize == 64) {</div>
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<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  processChunk();</div>
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<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  state.chunkSize = 0;</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>  }</div>
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<div class="line"><a name="l00100"></a><span class="lineno"> 100</span> }</div>
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<div class="line"><a name="l00101"></a><span class="lineno"> 101</span> </div>
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<div class="line"><a name="l00102"></a><span class="lineno"><a class="line" href="classSHA256.html#a695157bcdf5495ba892ebac309f3abd6"> 102</a></span> <span class="keywordtype">void</span> <a class="code" href="classSHA256.html#a695157bcdf5495ba892ebac309f3abd6">SHA256::finalize</a>(<span class="keywordtype">void</span> *hash, <span class="keywordtype">size_t</span> len)</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>  <span class="comment">// Pad the last chunk. We may need two padding chunks if there</span></div>
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<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="comment">// isn't enough room in the first for the padding and length.</span></div>
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<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  uint8_t *wbytes = (uint8_t *)state.w;</div>
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<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  if (state.chunkSize <= (64 - 9)) {</div>
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<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  wbytes[state.chunkSize] = 0x80;</div>
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<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  memset(wbytes + state.chunkSize + 1, 0x00, 64 - 8 - (state.chunkSize + 1));</div>
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<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  state.w[14] = htobe32((uint32_t)(state.length >> 32));</div>
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<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  state.w[15] = htobe32((uint32_t)state.length);</div>
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<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  processChunk();</div>
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<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  } <span class="keywordflow">else</span> {</div>
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<div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  wbytes[state.chunkSize] = 0x80;</div>
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<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  memset(wbytes + state.chunkSize + 1, 0x00, 64 - (state.chunkSize + 1));</div>
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<div class="line"><a name="l00116"></a><span class="lineno"> 116</span>  processChunk();</div>
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<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  memset(wbytes, 0x00, 64 - 8);</div>
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<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  state.w[14] = htobe32((uint32_t)(state.length >> 32));</div>
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<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  state.w[15] = htobe32((uint32_t)state.length);</div>
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<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  processChunk();</div>
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<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  }</div>
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<div class="line"><a name="l00122"></a><span class="lineno"> 122</span> </div>
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<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="comment">// Convert the result into big endian and return it.</span></div>
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<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="keywordflow">for</span> (uint8_t posn = 0; posn < 8; ++posn)</div>
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<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  state.w[posn] = htobe32(state.h[posn]);</div>
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<div class="line"><a name="l00126"></a><span class="lineno"> 126</span> </div>
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<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <span class="comment">// Copy the hash to the caller's return buffer.</span></div>
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<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="keywordflow">if</span> (len > 32)</div>
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<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  len = 32;</div>
|
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<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  memcpy(hash, state.w, len);</div>
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<div class="line"><a name="l00131"></a><span class="lineno"> 131</span> }</div>
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<div class="line"><a name="l00132"></a><span class="lineno"> 132</span> </div>
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<div class="line"><a name="l00133"></a><span class="lineno"><a class="line" href="classSHA256.html#add0d1649d533b27005ccd8508398c689"> 133</a></span> <span class="keywordtype">void</span> <a class="code" href="classSHA256.html#add0d1649d533b27005ccd8508398c689">SHA256::clear</a>()</div>
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|
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span> {</div>
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<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  clean(state);</div>
|
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<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  <a class="code" href="classSHA256.html#ad9d80d8fdccffb15497bd36285afce65">reset</a>();</div>
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<div class="line"><a name="l00137"></a><span class="lineno"> 137</span> }</div>
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<div class="line"><a name="l00138"></a><span class="lineno"> 138</span> </div>
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<div class="line"><a name="l00139"></a><span class="lineno"><a class="line" href="classSHA256.html#a2271683d6f1c7c103272f1dec55a6871"> 139</a></span> <span class="keywordtype">void</span> <a class="code" href="classSHA256.html#a2271683d6f1c7c103272f1dec55a6871">SHA256::resetHMAC</a>(<span class="keyword">const</span> <span class="keywordtype">void</span> *key, <span class="keywordtype">size_t</span> keyLen)</div>
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<div class="line"><a name="l00140"></a><span class="lineno"> 140</span> {</div>
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<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <a class="code" href="classHash.html#ab6f40c9af91dc3d738d9fcce59af63cc">formatHMACKey</a>(state.w, key, keyLen, 0x36);</div>
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<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  state.length += 64 * 8;</div>
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<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  processChunk();</div>
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<div class="line"><a name="l00144"></a><span class="lineno"> 144</span> }</div>
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<div class="line"><a name="l00145"></a><span class="lineno"> 145</span> </div>
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<div class="line"><a name="l00146"></a><span class="lineno"><a class="line" href="classSHA256.html#a28bc2510c5bdaf210a012f9f21a753cd"> 146</a></span> <span class="keywordtype">void</span> <a class="code" href="classSHA256.html#a28bc2510c5bdaf210a012f9f21a753cd">SHA256::finalizeHMAC</a>(<span class="keyword">const</span> <span class="keywordtype">void</span> *key, <span class="keywordtype">size_t</span> keyLen, <span class="keywordtype">void</span> *hash, <span class="keywordtype">size_t</span> hashLen)</div>
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<div class="line"><a name="l00147"></a><span class="lineno"> 147</span> {</div>
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<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  uint8_t temp[32];</div>
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<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <a class="code" href="classSHA256.html#a695157bcdf5495ba892ebac309f3abd6">finalize</a>(temp, <span class="keyword">sizeof</span>(temp));</div>
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<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <a class="code" href="classHash.html#ab6f40c9af91dc3d738d9fcce59af63cc">formatHMACKey</a>(state.w, key, keyLen, 0x5C);</div>
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<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  state.length += 64 * 8;</div>
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<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  processChunk();</div>
|
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<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  <a class="code" href="classSHA256.html#a555bf8efb17afd4842d2e55a1f39f27b">update</a>(temp, <span class="keyword">sizeof</span>(temp));</div>
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<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <a class="code" href="classSHA256.html#a695157bcdf5495ba892ebac309f3abd6">finalize</a>(hash, hashLen);</div>
|
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<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  clean(temp);</div>
|
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<div class="line"><a name="l00156"></a><span class="lineno"> 156</span> }</div>
|
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<div class="line"><a name="l00157"></a><span class="lineno"> 157</span> </div>
|
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<div class="line"><a name="l00163"></a><span class="lineno"> 163</span> <span class="keywordtype">void</span> SHA256::processChunk()</div>
|
|
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span> {</div>
|
|
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  <span class="comment">// Round constants for SHA-256.</span></div>
|
|
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  <span class="keyword">static</span> uint32_t <span class="keyword">const</span> k[64] PROGMEM = {</div>
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<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  0x428a2f98, 0x71374491, 0xb5c0fbcf, 0xe9b5dba5,</div>
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<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  0x3956c25b, 0x59f111f1, 0x923f82a4, 0xab1c5ed5,</div>
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<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  0xd807aa98, 0x12835b01, 0x243185be, 0x550c7dc3,</div>
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<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  0x72be5d74, 0x80deb1fe, 0x9bdc06a7, 0xc19bf174,</div>
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<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  0xe49b69c1, 0xefbe4786, 0x0fc19dc6, 0x240ca1cc,</div>
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<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  0x2de92c6f, 0x4a7484aa, 0x5cb0a9dc, 0x76f988da,</div>
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<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  0x983e5152, 0xa831c66d, 0xb00327c8, 0xbf597fc7,</div>
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<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  0xc6e00bf3, 0xd5a79147, 0x06ca6351, 0x14292967,</div>
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|
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  0x27b70a85, 0x2e1b2138, 0x4d2c6dfc, 0x53380d13,</div>
|
|
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  0x650a7354, 0x766a0abb, 0x81c2c92e, 0x92722c85,</div>
|
|
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  0xa2bfe8a1, 0xa81a664b, 0xc24b8b70, 0xc76c51a3,</div>
|
|
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  0xd192e819, 0xd6990624, 0xf40e3585, 0x106aa070,</div>
|
|
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  0x19a4c116, 0x1e376c08, 0x2748774c, 0x34b0bcb5,</div>
|
|
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  0x391c0cb3, 0x4ed8aa4a, 0x5b9cca4f, 0x682e6ff3,</div>
|
|
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  0x748f82ee, 0x78a5636f, 0x84c87814, 0x8cc70208,</div>
|
|
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  0x90befffa, 0xa4506ceb, 0xbef9a3f7, 0xc67178f2</div>
|
|
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  };</div>
|
|
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span> </div>
|
|
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  <span class="comment">// Convert the first 16 words from big endian to host byte order.</span></div>
|
|
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  uint8_t index;</div>
|
|
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  <span class="keywordflow">for</span> (index = 0; index < 16; ++index)</div>
|
|
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  state.w[index] = be32toh(state.w[index]);</div>
|
|
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span> </div>
|
|
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  <span class="comment">// Initialise working variables to the current hash value.</span></div>
|
|
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  uint32_t a = state.h[0];</div>
|
|
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  uint32_t b = state.h[1];</div>
|
|
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  uint32_t c = state.h[2];</div>
|
|
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  uint32_t d = state.h[3];</div>
|
|
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  uint32_t e = state.h[4];</div>
|
|
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  uint32_t f = state.h[5];</div>
|
|
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  uint32_t g = state.h[6];</div>
|
|
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  uint32_t h = state.h[7];</div>
|
|
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span> </div>
|
|
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  <span class="comment">// Perform the first 16 rounds of the compression function main loop.</span></div>
|
|
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  uint32_t temp1, temp2;</div>
|
|
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  <span class="keywordflow">for</span> (index = 0; index < 16; ++index) {</div>
|
|
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  temp1 = h + pgm_read_dword(k + index) + state.w[index] +</div>
|
|
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  (rightRotate6(e) ^ rightRotate11(e) ^ rightRotate25(e)) +</div>
|
|
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  ((e & f) ^ ((~e) & g));</div>
|
|
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  temp2 = (rightRotate2(a) ^ rightRotate13(a) ^ rightRotate22(a)) +</div>
|
|
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  ((a & b) ^ (a & c) ^ (b & c));</div>
|
|
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  h = g;</div>
|
|
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  g = f;</div>
|
|
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  f = e;</div>
|
|
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  e = d + temp1;</div>
|
|
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  d = c;</div>
|
|
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  c = b;</div>
|
|
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  b = a;</div>
|
|
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  a = temp1 + temp2;</div>
|
|
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  }</div>
|
|
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span> </div>
|
|
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  <span class="comment">// Perform the 48 remaining rounds. We expand the first 16 words to</span></div>
|
|
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  <span class="comment">// 64 in-place in the "w" array. This saves 192 bytes of memory</span></div>
|
|
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  <span class="comment">// that would have otherwise need to be allocated to the "w" array.</span></div>
|
|
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <span class="keywordflow">for</span> (; index < 64; ++index) {</div>
|
|
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <span class="comment">// Expand the next word.</span></div>
|
|
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  temp1 = state.w[(index - 15) & 0x0F];</div>
|
|
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  temp2 = state.w[(index - 2) & 0x0F];</div>
|
|
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  temp1 = state.w[index & 0x0F] =</div>
|
|
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  state.w[(index - 16) & 0x0F] + state.w[(index - 7) & 0x0F] +</div>
|
|
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  (rightRotate7(temp1) ^ rightRotate18(temp1) ^ (temp1 >> 3)) +</div>
|
|
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  (rightRotate17(temp2) ^ rightRotate19(temp2) ^ (temp2 >> 10));</div>
|
|
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span> </div>
|
|
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  <span class="comment">// Perform the round.</span></div>
|
|
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  temp1 = h + pgm_read_dword(k + index) + temp1 +</div>
|
|
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  (rightRotate6(e) ^ rightRotate11(e) ^ rightRotate25(e)) +</div>
|
|
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  ((e & f) ^ ((~e) & g));</div>
|
|
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  temp2 = (rightRotate2(a) ^ rightRotate13(a) ^ rightRotate22(a)) +</div>
|
|
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  ((a & b) ^ (a & c) ^ (b & c));</div>
|
|
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  h = g;</div>
|
|
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span>  g = f;</div>
|
|
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  f = e;</div>
|
|
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  e = d + temp1;</div>
|
|
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  d = c;</div>
|
|
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  c = b;</div>
|
|
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  b = a;</div>
|
|
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  a = temp1 + temp2;</div>
|
|
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  }</div>
|
|
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span> </div>
|
|
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  <span class="comment">// Add the compressed chunk to the current hash value.</span></div>
|
|
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  state.h[0] += a;</div>
|
|
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  state.h[1] += b;</div>
|
|
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  state.h[2] += c;</div>
|
|
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  state.h[3] += d;</div>
|
|
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  state.h[4] += e;</div>
|
|
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  state.h[5] += f;</div>
|
|
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  state.h[6] += g;</div>
|
|
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  state.h[7] += h;</div>
|
|
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span> </div>
|
|
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  <span class="comment">// Attempt to clean up the stack.</span></div>
|
|
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  a = b = c = d = e = f = g = h = temp1 = temp2 = 0;</div>
|
|
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span> }</div>
|
|
<div class="ttc" id="classSHA256_html_ad9d80d8fdccffb15497bd36285afce65"><div class="ttname"><a href="classSHA256.html#ad9d80d8fdccffb15497bd36285afce65">SHA256::reset</a></div><div class="ttdeci">void reset()</div><div class="ttdoc">Resets the hash ready for a new hashing process. </div><div class="ttdef"><b>Definition:</b> <a href="SHA256_8cpp_source.html#l00066">SHA256.cpp:66</a></div></div>
|
|
<div class="ttc" id="classSHA256_html_ab672831c542df07ff03ded25760feec2"><div class="ttname"><a href="classSHA256.html#ab672831c542df07ff03ded25760feec2">SHA256::SHA256</a></div><div class="ttdeci">SHA256()</div><div class="ttdoc">Constructs a SHA-256 hash object. </div><div class="ttdef"><b>Definition:</b> <a href="SHA256_8cpp_source.html#l00042">SHA256.cpp:42</a></div></div>
|
|
<div class="ttc" id="classSHA256_html_a695157bcdf5495ba892ebac309f3abd6"><div class="ttname"><a href="classSHA256.html#a695157bcdf5495ba892ebac309f3abd6">SHA256::finalize</a></div><div class="ttdeci">void finalize(void *hash, size_t len)</div><div class="ttdoc">Finalizes the hashing process and returns the hash. </div><div class="ttdef"><b>Definition:</b> <a href="SHA256_8cpp_source.html#l00102">SHA256.cpp:102</a></div></div>
|
|
<div class="ttc" id="classSHA256_html_ad82f2925b612de315b289017e023a73b"><div class="ttname"><a href="classSHA256.html#ad82f2925b612de315b289017e023a73b">SHA256::~SHA256</a></div><div class="ttdeci">virtual ~SHA256()</div><div class="ttdoc">Destroys this SHA-256 hash object after clearing sensitive information. </div><div class="ttdef"><b>Definition:</b> <a href="SHA256_8cpp_source.html#l00051">SHA256.cpp:51</a></div></div>
|
|
<div class="ttc" id="classSHA256_html_a71bbd9064f9d6191d0647f867953a858"><div class="ttname"><a href="classSHA256.html#a71bbd9064f9d6191d0647f867953a858">SHA256::blockSize</a></div><div class="ttdeci">size_t blockSize() const </div><div class="ttdoc">Size of the internal block used by the hash algorithm. </div><div class="ttdef"><b>Definition:</b> <a href="SHA256_8cpp_source.html#l00061">SHA256.cpp:61</a></div></div>
|
|
<div class="ttc" id="classSHA256_html_a28bc2510c5bdaf210a012f9f21a753cd"><div class="ttname"><a href="classSHA256.html#a28bc2510c5bdaf210a012f9f21a753cd">SHA256::finalizeHMAC</a></div><div class="ttdeci">void finalizeHMAC(const void *key, size_t keyLen, void *hash, size_t hashLen)</div><div class="ttdoc">Finalizes the HMAC hashing process and returns the hash. </div><div class="ttdef"><b>Definition:</b> <a href="SHA256_8cpp_source.html#l00146">SHA256.cpp:146</a></div></div>
|
|
<div class="ttc" id="classSHA256_html_a555bf8efb17afd4842d2e55a1f39f27b"><div class="ttname"><a href="classSHA256.html#a555bf8efb17afd4842d2e55a1f39f27b">SHA256::update</a></div><div class="ttdeci">void update(const void *data, size_t len)</div><div class="ttdoc">Updates the hash with more data. </div><div class="ttdef"><b>Definition:</b> <a href="SHA256_8cpp_source.html#l00080">SHA256.cpp:80</a></div></div>
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<div class="ttc" id="classSHA256_html_a103d5bc5ced792464a82cb1d7986de94"><div class="ttname"><a href="classSHA256.html#a103d5bc5ced792464a82cb1d7986de94">SHA256::hashSize</a></div><div class="ttdeci">size_t hashSize() const </div><div class="ttdoc">Size of the hash result from finalize(). </div><div class="ttdef"><b>Definition:</b> <a href="SHA256_8cpp_source.html#l00056">SHA256.cpp:56</a></div></div>
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<div class="ttc" id="classSHA256_html_add0d1649d533b27005ccd8508398c689"><div class="ttname"><a href="classSHA256.html#add0d1649d533b27005ccd8508398c689">SHA256::clear</a></div><div class="ttdeci">void clear()</div><div class="ttdoc">Clears the hash state, removing all sensitive data, and then resets the hash ready for a new hashing ...</div><div class="ttdef"><b>Definition:</b> <a href="SHA256_8cpp_source.html#l00133">SHA256.cpp:133</a></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="classSHA256_html_a2271683d6f1c7c103272f1dec55a6871"><div class="ttname"><a href="classSHA256.html#a2271683d6f1c7c103272f1dec55a6871">SHA256::resetHMAC</a></div><div class="ttdeci">void resetHMAC(const void *key, size_t keyLen)</div><div class="ttdoc">Resets the hash ready for a new HMAC hashing process. </div><div class="ttdef"><b>Definition:</b> <a href="SHA256_8cpp_source.html#l00139">SHA256.cpp:139</a></div></div>
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