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<div class="headertitle"><div class="title">sha1.cpp</div></div>
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<a href="../../d8/d7a/sha1_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span></div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span> </div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span><span class="preprocessor">#include &lt;algorithm&gt;</span> </div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span><span class="preprocessor">#include &lt;array&gt;</span> </div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span><span class="preprocessor">#include &lt;cassert&gt;</span> </div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span><span class="preprocessor">#include &lt;cstdint&gt;</span></div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span><span class="preprocessor">#include &lt;cstring&gt;</span> </div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span><span class="preprocessor">#include &lt;iostream&gt;</span> </div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span><span class="preprocessor">#include &lt;string&gt;</span> </div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span><span class="preprocessor">#include &lt;vector&gt;</span> </div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span></div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span><span class="keyword">namespace </span><a class="code hl_namespace" href="../../d6/d0c/namespacehashing.html">hashing</a> {</div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span><span class="keyword">namespace </span>sha1 {</div>
<div class="foldopen" id="foldopen00058" data-start="{" data-end="}">
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"><a class="line" href="../../d8/d7a/sha1_8cpp.html#acf6bd970f29a68702bdbdfe8338e45e0"> 58</a></span>uint32_t <a class="code hl_function" href="../../d8/d7a/sha1_8cpp.html#acf6bd970f29a68702bdbdfe8338e45e0">leftRotate32bits</a>(uint32_t n, std::size_t rotate) {</div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span> <span class="keywordflow">return</span> (n &lt;&lt; rotate) | (n &gt;&gt; (32 - rotate));</div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span>}</div>
</div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span></div>
<div class="foldopen" id="foldopen00067" data-start="{" data-end="}">
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"><a class="line" href="../../d8/d7a/sha1_8cpp.html#aada0803ef851d831b7a290a924e3c228"> 67</a></span>std::string <a class="code hl_function" href="../../d8/d7a/sha1_8cpp.html#aada0803ef851d831b7a290a924e3c228">sig2hex</a>(<span class="keywordtype">void</span>* sig) {</div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> <span class="keyword">const</span> <span class="keywordtype">char</span>* hexChars = <span class="stringliteral">&quot;0123456789abcdef&quot;</span>;</div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> <span class="keyword">auto</span>* intsig = <span class="keyword">static_cast&lt;</span>uint8_t*<span class="keyword">&gt;</span>(sig);</div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span> std::string hex = <span class="stringliteral">&quot;&quot;</span>;</div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> <span class="keywordflow">for</span> (uint8_t i = 0; i &lt; 20; i++) {</div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> hex.push_back(hexChars[(intsig[i] &gt;&gt; 4) &amp; 0xF]);</div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> hex.push_back(hexChars[(intsig[i]) &amp; 0xF]);</div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span> }</div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span> <span class="keywordflow">return</span> hex;</div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span>}</div>
</div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span></div>
<div class="foldopen" id="foldopen00084" data-start="{" data-end="}">
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"><a class="line" href="../../d8/d7a/sha1_8cpp.html#a7be3471f7e489d7d0df42b97a48bf141"> 84</a></span><span class="keywordtype">void</span>* <a class="code hl_function" href="../../d8/d7a/sha1_8cpp.html#a7be3471f7e489d7d0df42b97a48bf141">hash_bs</a>(<span class="keyword">const</span> <span class="keywordtype">void</span>* input_bs, uint64_t input_size) {</div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span> <span class="keyword">auto</span>* input = <span class="keyword">static_cast&lt;</span><span class="keyword">const </span>uint8_t*<span class="keyword">&gt;</span>(input_bs);</div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span> </div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span> <span class="comment">// Step 0: The initial 160-bit state</span></div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span> uint32_t h0 = 0x67452301, a = 0;</div>
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno"> 89</span> uint32_t h1 = 0xEFCDAB89, b = 0;</div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span> uint32_t h2 = 0x98BADCFE, c = 0;</div>
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno"> 91</span> uint32_t h3 = 0x10325476, d = 0;</div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno"> 92</span> uint32_t h4 = 0xC3D2E1F0, e = 0;</div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno"> 93</span> </div>
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno"> 94</span> <span class="comment">// Step 1: Processing the bytestring</span></div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno"> 95</span> <span class="comment">// First compute the size the padded message will have</span></div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno"> 96</span> <span class="comment">// so it is possible to allocate the right amount of memory</span></div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno"> 97</span> uint64_t padded_message_size = 0;</div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno"> 98</span> <span class="keywordflow">if</span> (input_size % 64 &lt; 56) {</div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno"> 99</span> padded_message_size = input_size + 64 - (input_size % 64);</div>
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno"> 100</span> } <span class="keywordflow">else</span> {</div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno"> 101</span> padded_message_size = input_size + 128 - (input_size % 64);</div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno"> 102</span> }</div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno"> 103</span> </div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno"> 104</span> <span class="comment">// Allocate the memory for the padded message</span></div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno"> 105</span> std::vector&lt;uint8_t&gt; padded_message(padded_message_size);</div>
<div class="line"><a id="l00106" name="l00106"></a><span class="lineno"> 106</span> </div>
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno"> 107</span> <span class="comment">// Beginning of the padded message is the original message</span></div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno"> 108</span> std::copy(input, input + input_size, padded_message.begin());</div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno"> 109</span> </div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno"> 110</span> <span class="comment">// Afterwards comes a single 1 bit and then only zeroes</span></div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno"> 111</span> padded_message[input_size] = 1 &lt;&lt; 7; <span class="comment">// 10000000</span></div>
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno"> 112</span> <span class="keywordflow">for</span> (uint64_t i = input_size; i % 64 != 56; i++) {</div>
<div class="line"><a id="l00113" name="l00113"></a><span class="lineno"> 113</span> <span class="keywordflow">if</span> (i == input_size) {</div>
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno"> 114</span> <span class="keywordflow">continue</span>; <span class="comment">// pass first iteration</span></div>
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno"> 115</span> }</div>
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno"> 116</span> padded_message[i] = 0;</div>
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno"> 117</span> }</div>
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno"> 118</span> </div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno"> 119</span> <span class="comment">// We then have to add the 64-bit size of the message in bits (hence the</span></div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno"> 120</span> <span class="comment">// times 8) in the last 8 bytes</span></div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno"> 121</span> uint64_t input_bitsize = input_size * 8;</div>
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno"> 122</span> <span class="keywordflow">for</span> (uint8_t i = 0; i &lt; 8; i++) {</div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno"> 123</span> padded_message[padded_message_size - 8 + i] =</div>
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno"> 124</span> (input_bitsize &gt;&gt; (56 - 8 * i)) &amp; 0xFF;</div>
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno"> 125</span> }</div>
<div class="line"><a id="l00126" name="l00126"></a><span class="lineno"> 126</span> </div>
<div class="line"><a id="l00127" name="l00127"></a><span class="lineno"> 127</span> <span class="comment">// Already allocate memory for blocks</span></div>
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno"> 128</span> std::array&lt;uint32_t, 80&gt; blocks{};</div>
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno"> 129</span> </div>
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno"> 130</span> <span class="comment">// Rounds</span></div>
<div class="line"><a id="l00131" name="l00131"></a><span class="lineno"> 131</span> <span class="keywordflow">for</span> (uint64_t chunk = 0; chunk * 64 &lt; padded_message_size; chunk++) {</div>
<div class="line"><a id="l00132" name="l00132"></a><span class="lineno"> 132</span> <span class="comment">// First, build 16 32-bits blocks from the chunk</span></div>
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno"> 133</span> <span class="keywordflow">for</span> (uint8_t bid = 0; bid &lt; 16; bid++) {</div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno"> 134</span> blocks[bid] = 0;</div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno"> 135</span> </div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno"> 136</span> <span class="comment">// Having to build a 32-bit word from 4-bit words</span></div>
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno"> 137</span> <span class="comment">// Add each and shift them to the left</span></div>
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno"> 138</span> <span class="keywordflow">for</span> (uint8_t cid = 0; cid &lt; 4; cid++) {</div>
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno"> 139</span> blocks[bid] = (blocks[bid] &lt;&lt; 8) +</div>
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno"> 140</span> padded_message[chunk * 64 + bid * 4 + cid];</div>
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno"> 141</span> }</div>
<div class="line"><a id="l00142" name="l00142"></a><span class="lineno"> 142</span> </div>
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno"> 143</span> <span class="comment">// Extend the 16 32-bit words into 80 32-bit words</span></div>
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno"> 144</span> <span class="keywordflow">for</span> (uint8_t i = 16; i &lt; 80; i++) {</div>
<div class="line"><a id="l00145" name="l00145"></a><span class="lineno"> 145</span> blocks[i] =</div>
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno"> 146</span> <a class="code hl_function" href="../../d8/d7a/sha1_8cpp.html#acf6bd970f29a68702bdbdfe8338e45e0">leftRotate32bits</a>(blocks[i - 3] ^ blocks[i - 8] ^</div>
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno"> 147</span> blocks[i - 14] ^ blocks[i - 16],</div>
<div class="line"><a id="l00148" name="l00148"></a><span class="lineno"> 148</span> 1);</div>
<div class="line"><a id="l00149" name="l00149"></a><span class="lineno"> 149</span> }</div>
<div class="line"><a id="l00150" name="l00150"></a><span class="lineno"> 150</span> }</div>
<div class="line"><a id="l00151" name="l00151"></a><span class="lineno"> 151</span> </div>
<div class="line"><a id="l00152" name="l00152"></a><span class="lineno"> 152</span> a = h0;</div>
<div class="line"><a id="l00153" name="l00153"></a><span class="lineno"> 153</span> b = h1;</div>
<div class="line"><a id="l00154" name="l00154"></a><span class="lineno"> 154</span> c = h2;</div>
<div class="line"><a id="l00155" name="l00155"></a><span class="lineno"> 155</span> d = h3;</div>
<div class="line"><a id="l00156" name="l00156"></a><span class="lineno"> 156</span> e = h4;</div>
<div class="line"><a id="l00157" name="l00157"></a><span class="lineno"> 157</span> </div>
<div class="line"><a id="l00158" name="l00158"></a><span class="lineno"> 158</span> <span class="comment">// Main &quot;hashing&quot; loop</span></div>
<div class="line"><a id="l00159" name="l00159"></a><span class="lineno"> 159</span> <span class="keywordflow">for</span> (uint8_t i = 0; i &lt; 80; i++) {</div>
<div class="line"><a id="l00160" name="l00160"></a><span class="lineno"> 160</span> uint32_t F = 0, g = 0;</div>
<div class="line"><a id="l00161" name="l00161"></a><span class="lineno"> 161</span> <span class="keywordflow">if</span> (i &lt; 20) {</div>
<div class="line"><a id="l00162" name="l00162"></a><span class="lineno"> 162</span> F = (b &amp; c) | ((~b) &amp; d);</div>
<div class="line"><a id="l00163" name="l00163"></a><span class="lineno"> 163</span> g = 0x5A827999;</div>
<div class="line"><a id="l00164" name="l00164"></a><span class="lineno"> 164</span> } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (i &lt; 40) {</div>
<div class="line"><a id="l00165" name="l00165"></a><span class="lineno"> 165</span> F = b ^ c ^ d;</div>
<div class="line"><a id="l00166" name="l00166"></a><span class="lineno"> 166</span> g = 0x6ED9EBA1;</div>
<div class="line"><a id="l00167" name="l00167"></a><span class="lineno"> 167</span> } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (i &lt; 60) {</div>
<div class="line"><a id="l00168" name="l00168"></a><span class="lineno"> 168</span> F = (b &amp; c) | (b &amp; d) | (c &amp; d);</div>
<div class="line"><a id="l00169" name="l00169"></a><span class="lineno"> 169</span> g = 0x8F1BBCDC;</div>
<div class="line"><a id="l00170" name="l00170"></a><span class="lineno"> 170</span> } <span class="keywordflow">else</span> {</div>
<div class="line"><a id="l00171" name="l00171"></a><span class="lineno"> 171</span> F = b ^ c ^ d;</div>
<div class="line"><a id="l00172" name="l00172"></a><span class="lineno"> 172</span> g = 0xCA62C1D6;</div>
<div class="line"><a id="l00173" name="l00173"></a><span class="lineno"> 173</span> }</div>
<div class="line"><a id="l00174" name="l00174"></a><span class="lineno"> 174</span> </div>
<div class="line"><a id="l00175" name="l00175"></a><span class="lineno"> 175</span> <span class="comment">// Update the accumulators</span></div>
<div class="line"><a id="l00176" name="l00176"></a><span class="lineno"> 176</span> uint32_t temp = <a class="code hl_function" href="../../d8/d7a/sha1_8cpp.html#acf6bd970f29a68702bdbdfe8338e45e0">leftRotate32bits</a>(a, 5) + F + e + g + blocks[i];</div>
<div class="line"><a id="l00177" name="l00177"></a><span class="lineno"> 177</span> e = d;</div>
<div class="line"><a id="l00178" name="l00178"></a><span class="lineno"> 178</span> d = c;</div>
<div class="line"><a id="l00179" name="l00179"></a><span class="lineno"> 179</span> c = <a class="code hl_function" href="../../d8/d7a/sha1_8cpp.html#acf6bd970f29a68702bdbdfe8338e45e0">leftRotate32bits</a>(b, 30);</div>
<div class="line"><a id="l00180" name="l00180"></a><span class="lineno"> 180</span> b = a;</div>
<div class="line"><a id="l00181" name="l00181"></a><span class="lineno"> 181</span> a = temp;</div>
<div class="line"><a id="l00182" name="l00182"></a><span class="lineno"> 182</span> }</div>
<div class="line"><a id="l00183" name="l00183"></a><span class="lineno"> 183</span> <span class="comment">// Update the state with this chunk&#39;s hash</span></div>
<div class="line"><a id="l00184" name="l00184"></a><span class="lineno"> 184</span> h0 += a;</div>
<div class="line"><a id="l00185" name="l00185"></a><span class="lineno"> 185</span> h1 += b;</div>
<div class="line"><a id="l00186" name="l00186"></a><span class="lineno"> 186</span> h2 += c;</div>
<div class="line"><a id="l00187" name="l00187"></a><span class="lineno"> 187</span> h3 += d;</div>
<div class="line"><a id="l00188" name="l00188"></a><span class="lineno"> 188</span> h4 += e;</div>
<div class="line"><a id="l00189" name="l00189"></a><span class="lineno"> 189</span> }</div>
<div class="line"><a id="l00190" name="l00190"></a><span class="lineno"> 190</span> </div>
<div class="line"><a id="l00191" name="l00191"></a><span class="lineno"> 191</span> <span class="comment">// Build signature from state</span></div>
<div class="line"><a id="l00192" name="l00192"></a><span class="lineno"> 192</span> <span class="comment">// Note, any type could be used for the signature</span></div>
<div class="line"><a id="l00193" name="l00193"></a><span class="lineno"> 193</span> <span class="comment">// uint8_t was used to make the 20 bytes obvious</span></div>
<div class="line"><a id="l00194" name="l00194"></a><span class="lineno"> 194</span> <span class="keyword">auto</span>* sig = <span class="keyword">new</span> uint8_t[20];</div>
<div class="line"><a id="l00195" name="l00195"></a><span class="lineno"> 195</span> <span class="keywordflow">for</span> (uint8_t i = 0; i &lt; 4; i++) {</div>
<div class="line"><a id="l00196" name="l00196"></a><span class="lineno"> 196</span> sig[i] = (h0 &gt;&gt; (24 - 8 * i)) &amp; 0xFF;</div>
<div class="line"><a id="l00197" name="l00197"></a><span class="lineno"> 197</span> sig[i + 4] = (h1 &gt;&gt; (24 - 8 * i)) &amp; 0xFF;</div>
<div class="line"><a id="l00198" name="l00198"></a><span class="lineno"> 198</span> sig[i + 8] = (h2 &gt;&gt; (24 - 8 * i)) &amp; 0xFF;</div>
<div class="line"><a id="l00199" name="l00199"></a><span class="lineno"> 199</span> sig[i + 12] = (h3 &gt;&gt; (24 - 8 * i)) &amp; 0xFF;</div>
<div class="line"><a id="l00200" name="l00200"></a><span class="lineno"> 200</span> sig[i + 16] = (h4 &gt;&gt; (24 - 8 * i)) &amp; 0xFF;</div>
<div class="line"><a id="l00201" name="l00201"></a><span class="lineno"> 201</span> }</div>
<div class="line"><a id="l00202" name="l00202"></a><span class="lineno"> 202</span> </div>
<div class="line"><a id="l00203" name="l00203"></a><span class="lineno"> 203</span> <span class="keywordflow">return</span> sig;</div>
<div class="line"><a id="l00204" name="l00204"></a><span class="lineno"> 204</span>}</div>
</div>
<div class="line"><a id="l00205" name="l00205"></a><span class="lineno"> 205</span></div>
<div class="foldopen" id="foldopen00211" data-start="{" data-end="}">
<div class="line"><a id="l00211" name="l00211"></a><span class="lineno"><a class="line" href="../../d8/d7a/sha1_8cpp.html#a2397f2444a05e4d1487c67e215410d3c"> 211</a></span><span class="keywordtype">void</span>* <a class="code hl_function" href="../../d8/d7a/sha1_8cpp.html#a2397f2444a05e4d1487c67e215410d3c">hash</a>(<span class="keyword">const</span> std::string&amp; message) {</div>
<div class="line"><a id="l00212" name="l00212"></a><span class="lineno"> 212</span> <span class="keywordflow">return</span> <a class="code hl_function" href="../../d8/d7a/sha1_8cpp.html#a7be3471f7e489d7d0df42b97a48bf141">hash_bs</a>(&amp;message[0], message.size());</div>
<div class="line"><a id="l00213" name="l00213"></a><span class="lineno"> 213</span>}</div>
</div>
<div class="line"><a id="l00214" name="l00214"></a><span class="lineno"> 214</span>} <span class="comment">// namespace sha1</span></div>
<div class="line"><a id="l00215" name="l00215"></a><span class="lineno"> 215</span>} <span class="comment">// namespace hashing</span></div>
<div class="line"><a id="l00216" name="l00216"></a><span class="lineno"> 216</span></div>
<div class="foldopen" id="foldopen00221" data-start="{" data-end="}">
<div class="line"><a id="l00221" name="l00221"></a><span class="lineno"><a class="line" href="../../d8/d7a/sha1_8cpp.html#aa8dca7b867074164d5f45b0f3851269d"> 221</a></span><span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code hl_function" href="../../d8/d7a/sha1_8cpp.html#aa8dca7b867074164d5f45b0f3851269d">test</a>() {</div>
<div class="line"><a id="l00222" name="l00222"></a><span class="lineno"> 222</span> <span class="comment">// Hashes empty string and stores signature</span></div>
<div class="line"><a id="l00223" name="l00223"></a><span class="lineno"> 223</span> <span class="keywordtype">void</span>* sig = <a class="code hl_function" href="../../d8/d7a/sha1_8cpp.html#a2397f2444a05e4d1487c67e215410d3c">hashing::sha1::hash</a>(<span class="stringliteral">&quot;&quot;</span>);</div>
<div class="line"><a id="l00224" name="l00224"></a><span class="lineno"> 224</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Hashing empty string&quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><a id="l00225" name="l00225"></a><span class="lineno"> 225</span> <span class="comment">// Prints signature hex representation</span></div>
<div class="line"><a id="l00226" name="l00226"></a><span class="lineno"> 226</span> std::cout &lt;&lt; <a class="code hl_function" href="../../d8/d7a/sha1_8cpp.html#aada0803ef851d831b7a290a924e3c228">hashing::sha1::sig2hex</a>(sig) &lt;&lt; std::endl &lt;&lt; std::endl;</div>
<div class="line"><a id="l00227" name="l00227"></a><span class="lineno"> 227</span> <span class="comment">// Test with cassert wether sig is correct from expected value</span></div>
<div class="line"><a id="l00228" name="l00228"></a><span class="lineno"> 228</span> assert(<a class="code hl_function" href="../../d8/d7a/sha1_8cpp.html#aada0803ef851d831b7a290a924e3c228">hashing::sha1::sig2hex</a>(sig).<a class="code hl_function" href="../../d4/d7a/shell__sort2_8cpp.html#a7eb77daed2cf1513f6d68c47a1c2db1c">compare</a>(</div>
<div class="line"><a id="l00229" name="l00229"></a><span class="lineno"> 229</span> <span class="stringliteral">&quot;da39a3ee5e6b4b0d3255bfef95601890afd80709&quot;</span>) == 0);</div>
<div class="line"><a id="l00230" name="l00230"></a><span class="lineno"> 230</span> </div>
<div class="line"><a id="l00231" name="l00231"></a><span class="lineno"> 231</span> <span class="comment">// Hashes &quot;The quick brown fox jumps over the lazy dog&quot; and stores signature</span></div>
<div class="line"><a id="l00232" name="l00232"></a><span class="lineno"> 232</span> <span class="keywordtype">void</span>* sig2 =</div>
<div class="line"><a id="l00233" name="l00233"></a><span class="lineno"> 233</span> <a class="code hl_function" href="../../d8/d7a/sha1_8cpp.html#a2397f2444a05e4d1487c67e215410d3c">hashing::sha1::hash</a>(<span class="stringliteral">&quot;The quick brown fox jumps over the lazy dog&quot;</span>);</div>
<div class="line"><a id="l00234" name="l00234"></a><span class="lineno"> 234</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Hashing The quick brown fox jumps over the lazy dog&quot;</span></div>
<div class="line"><a id="l00235" name="l00235"></a><span class="lineno"> 235</span> &lt;&lt; std::endl;</div>
<div class="line"><a id="l00236" name="l00236"></a><span class="lineno"> 236</span> <span class="comment">// Prints signature hex representation</span></div>
<div class="line"><a id="l00237" name="l00237"></a><span class="lineno"> 237</span> std::cout &lt;&lt; <a class="code hl_function" href="../../d8/d7a/sha1_8cpp.html#aada0803ef851d831b7a290a924e3c228">hashing::sha1::sig2hex</a>(sig2) &lt;&lt; std::endl &lt;&lt; std::endl;</div>
<div class="line"><a id="l00238" name="l00238"></a><span class="lineno"> 238</span> <span class="comment">// Test with cassert wether sig is correct from expected value</span></div>
<div class="line"><a id="l00239" name="l00239"></a><span class="lineno"> 239</span> assert(<a class="code hl_function" href="../../d8/d7a/sha1_8cpp.html#aada0803ef851d831b7a290a924e3c228">hashing::sha1::sig2hex</a>(sig2).<a class="code hl_function" href="../../d4/d7a/shell__sort2_8cpp.html#a7eb77daed2cf1513f6d68c47a1c2db1c">compare</a>(</div>
<div class="line"><a id="l00240" name="l00240"></a><span class="lineno"> 240</span> <span class="stringliteral">&quot;2fd4e1c67a2d28fced849ee1bb76e7391b93eb12&quot;</span>) == 0);</div>
<div class="line"><a id="l00241" name="l00241"></a><span class="lineno"> 241</span> </div>
<div class="line"><a id="l00242" name="l00242"></a><span class="lineno"> 242</span> <span class="comment">// Hashes &quot;The quick brown fox jumps over the lazy dog.&quot; (notice the</span></div>
<div class="line"><a id="l00243" name="l00243"></a><span class="lineno"> 243</span> <span class="comment">// additional period) and stores signature</span></div>
<div class="line"><a id="l00244" name="l00244"></a><span class="lineno"> 244</span> <span class="keywordtype">void</span>* sig3 =</div>
<div class="line"><a id="l00245" name="l00245"></a><span class="lineno"> 245</span> <a class="code hl_function" href="../../d8/d7a/sha1_8cpp.html#a2397f2444a05e4d1487c67e215410d3c">hashing::sha1::hash</a>(<span class="stringliteral">&quot;The quick brown fox jumps over the lazy dog.&quot;</span>);</div>
<div class="line"><a id="l00246" name="l00246"></a><span class="lineno"> 246</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Hashing &quot;</span></div>
<div class="line"><a id="l00247" name="l00247"></a><span class="lineno"> 247</span> <span class="stringliteral">&quot;The quick brown fox jumps over the lazy dog.&quot;</span></div>
<div class="line"><a id="l00248" name="l00248"></a><span class="lineno"> 248</span> &lt;&lt; std::endl;</div>
<div class="line"><a id="l00249" name="l00249"></a><span class="lineno"> 249</span> <span class="comment">// Prints signature hex representation</span></div>
<div class="line"><a id="l00250" name="l00250"></a><span class="lineno"> 250</span> std::cout &lt;&lt; <a class="code hl_function" href="../../d8/d7a/sha1_8cpp.html#aada0803ef851d831b7a290a924e3c228">hashing::sha1::sig2hex</a>(sig3) &lt;&lt; std::endl &lt;&lt; std::endl;</div>
<div class="line"><a id="l00251" name="l00251"></a><span class="lineno"> 251</span> <span class="comment">// Test with cassert wether sig is correct from expected value</span></div>
<div class="line"><a id="l00252" name="l00252"></a><span class="lineno"> 252</span> assert(<a class="code hl_function" href="../../d8/d7a/sha1_8cpp.html#aada0803ef851d831b7a290a924e3c228">hashing::sha1::sig2hex</a>(sig3).<a class="code hl_function" href="../../d4/d7a/shell__sort2_8cpp.html#a7eb77daed2cf1513f6d68c47a1c2db1c">compare</a>(</div>
<div class="line"><a id="l00253" name="l00253"></a><span class="lineno"> 253</span> <span class="stringliteral">&quot;408d94384216f890ff7a0c3528e8bed1e0b01621&quot;</span>) == 0);</div>
<div class="line"><a id="l00254" name="l00254"></a><span class="lineno"> 254</span> </div>
<div class="line"><a id="l00255" name="l00255"></a><span class="lineno"> 255</span> <span class="comment">// Hashes &quot;ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789&quot;</span></div>
<div class="line"><a id="l00256" name="l00256"></a><span class="lineno"> 256</span> <span class="comment">// and stores signature</span></div>
<div class="line"><a id="l00257" name="l00257"></a><span class="lineno"> 257</span> <span class="keywordtype">void</span>* sig4 = <a class="code hl_function" href="../../d8/d7a/sha1_8cpp.html#a2397f2444a05e4d1487c67e215410d3c">hashing::sha1::hash</a>(</div>
<div class="line"><a id="l00258" name="l00258"></a><span class="lineno"> 258</span> <span class="stringliteral">&quot;ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789&quot;</span>);</div>
<div class="line"><a id="l00259" name="l00259"></a><span class="lineno"> 259</span> std::cout</div>
<div class="line"><a id="l00260" name="l00260"></a><span class="lineno"> 260</span> &lt;&lt; <span class="stringliteral">&quot;Hashing &quot;</span></div>
<div class="line"><a id="l00261" name="l00261"></a><span class="lineno"> 261</span> <span class="stringliteral">&quot;ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789&quot;</span></div>
<div class="line"><a id="l00262" name="l00262"></a><span class="lineno"> 262</span> &lt;&lt; std::endl;</div>
<div class="line"><a id="l00263" name="l00263"></a><span class="lineno"> 263</span> <span class="comment">// Prints signature hex representation</span></div>
<div class="line"><a id="l00264" name="l00264"></a><span class="lineno"> 264</span> std::cout &lt;&lt; <a class="code hl_function" href="../../d8/d7a/sha1_8cpp.html#aada0803ef851d831b7a290a924e3c228">hashing::sha1::sig2hex</a>(sig4) &lt;&lt; std::endl &lt;&lt; std::endl;</div>
<div class="line"><a id="l00265" name="l00265"></a><span class="lineno"> 265</span> <span class="comment">// Test with cassert wether sig is correct from expected value</span></div>
<div class="line"><a id="l00266" name="l00266"></a><span class="lineno"> 266</span> assert(<a class="code hl_function" href="../../d8/d7a/sha1_8cpp.html#aada0803ef851d831b7a290a924e3c228">hashing::sha1::sig2hex</a>(sig4).<a class="code hl_function" href="../../d4/d7a/shell__sort2_8cpp.html#a7eb77daed2cf1513f6d68c47a1c2db1c">compare</a>(</div>
<div class="line"><a id="l00267" name="l00267"></a><span class="lineno"> 267</span> <span class="stringliteral">&quot;761c457bf73b14d27e9e9265c46f4b4dda11f940&quot;</span>) == 0);</div>
<div class="line"><a id="l00268" name="l00268"></a><span class="lineno"> 268</span>}</div>
</div>
<div class="line"><a id="l00269" name="l00269"></a><span class="lineno"> 269</span></div>
<div class="foldopen" id="foldopen00275" data-start="{" data-end="}">
<div class="line"><a id="l00275" name="l00275"></a><span class="lineno"><a class="line" href="../../d8/d7a/sha1_8cpp.html#ac9e1a11f44135b890dd10a00e73b5661"> 275</a></span><span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code hl_function" href="../../d8/d7a/sha1_8cpp.html#ac9e1a11f44135b890dd10a00e73b5661">interactive</a>() {</div>
<div class="line"><a id="l00276" name="l00276"></a><span class="lineno"> 276</span> <span class="keywordflow">while</span> (<span class="keyword">true</span>) {</div>
<div class="line"><a id="l00277" name="l00277"></a><span class="lineno"> 277</span> std::string input;</div>
<div class="line"><a id="l00278" name="l00278"></a><span class="lineno"> 278</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Enter a message to be hashed (Ctrl-C to exit): &quot;</span></div>
<div class="line"><a id="l00279" name="l00279"></a><span class="lineno"> 279</span> &lt;&lt; std::endl;</div>
<div class="line"><a id="l00280" name="l00280"></a><span class="lineno"> 280</span> std::getline(std::cin, input);</div>
<div class="line"><a id="l00281" name="l00281"></a><span class="lineno"> 281</span> <span class="keywordtype">void</span>* sig = <a class="code hl_function" href="../../d8/d7a/sha1_8cpp.html#a2397f2444a05e4d1487c67e215410d3c">hashing::sha1::hash</a>(input);</div>
<div class="line"><a id="l00282" name="l00282"></a><span class="lineno"> 282</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Hash is: &quot;</span> &lt;&lt; <a class="code hl_function" href="../../d8/d7a/sha1_8cpp.html#aada0803ef851d831b7a290a924e3c228">hashing::sha1::sig2hex</a>(sig) &lt;&lt; std::endl;</div>
<div class="line"><a id="l00283" name="l00283"></a><span class="lineno"> 283</span> </div>
<div class="line"><a id="l00284" name="l00284"></a><span class="lineno"> 284</span> <span class="keywordflow">while</span> (<span class="keyword">true</span>) {</div>
<div class="line"><a id="l00285" name="l00285"></a><span class="lineno"> 285</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Want to enter another message? (y/n) &quot;</span>;</div>
<div class="line"><a id="l00286" name="l00286"></a><span class="lineno"> 286</span> std::getline(std::cin, input);</div>
<div class="line"><a id="l00287" name="l00287"></a><span class="lineno"> 287</span> <span class="keywordflow">if</span> (input.compare(<span class="stringliteral">&quot;y&quot;</span>) == 0) {</div>
<div class="line"><a id="l00288" name="l00288"></a><span class="lineno"> 288</span> <span class="keywordflow">break</span>;</div>
<div class="line"><a id="l00289" name="l00289"></a><span class="lineno"> 289</span> } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (input.compare(<span class="stringliteral">&quot;n&quot;</span>) == 0) {</div>
<div class="line"><a id="l00290" name="l00290"></a><span class="lineno"> 290</span> <span class="keywordflow">return</span>;</div>
<div class="line"><a id="l00291" name="l00291"></a><span class="lineno"> 291</span> }</div>
<div class="line"><a id="l00292" name="l00292"></a><span class="lineno"> 292</span> }</div>
<div class="line"><a id="l00293" name="l00293"></a><span class="lineno"> 293</span> }</div>
<div class="line"><a id="l00294" name="l00294"></a><span class="lineno"> 294</span>}</div>
</div>
<div class="line"><a id="l00295" name="l00295"></a><span class="lineno"> 295</span></div>
<div class="foldopen" id="foldopen00300" data-start="{" data-end="}">
<div class="line"><a id="l00300" name="l00300"></a><span class="lineno"><a class="line" href="../../d8/d7a/sha1_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4"> 300</a></span><span class="keywordtype">int</span> <a class="code hl_function" href="../../d8/d7a/sha1_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4">main</a>() {</div>
<div class="line"><a id="l00301" name="l00301"></a><span class="lineno"> 301</span> <a class="code hl_function" href="../../d8/d7a/sha1_8cpp.html#aa8dca7b867074164d5f45b0f3851269d">test</a>(); <span class="comment">// run self-test implementations</span></div>
<div class="line"><a id="l00302" name="l00302"></a><span class="lineno"> 302</span> </div>
<div class="line"><a id="l00303" name="l00303"></a><span class="lineno"> 303</span> <span class="comment">// Launch interactive mode where user can input messages and see</span></div>
<div class="line"><a id="l00304" name="l00304"></a><span class="lineno"> 304</span> <span class="comment">// their hash</span></div>
<div class="line"><a id="l00305" name="l00305"></a><span class="lineno"> 305</span> <a class="code hl_function" href="../../d8/d7a/sha1_8cpp.html#ac9e1a11f44135b890dd10a00e73b5661">interactive</a>();</div>
<div class="line"><a id="l00306" name="l00306"></a><span class="lineno"> 306</span> <span class="keywordflow">return</span> 0;</div>
<div class="line"><a id="l00307" name="l00307"></a><span class="lineno"> 307</span>}</div>
</div>
<div class="ttc" id="anamespacehashing_html"><div class="ttname"><a href="../../d6/d0c/namespacehashing.html">hashing</a></div><div class="ttdoc">Used for assert.</div></div>
<div class="ttc" id="asha1_8cpp_html_a2397f2444a05e4d1487c67e215410d3c"><div class="ttname"><a href="../../d8/d7a/sha1_8cpp.html#a2397f2444a05e4d1487c67e215410d3c">hashing::sha1::hash</a></div><div class="ttdeci">void * hash(const std::string &amp;message)</div><div class="ttdoc">Converts the string to bytestring and calls the main algorithm.</div><div class="ttdef"><b>Definition</b> <a href="#l00211">sha1.cpp:211</a></div></div>
<div class="ttc" id="asha1_8cpp_html_a7be3471f7e489d7d0df42b97a48bf141"><div class="ttname"><a href="../../d8/d7a/sha1_8cpp.html#a7be3471f7e489d7d0df42b97a48bf141">hashing::sha1::hash_bs</a></div><div class="ttdeci">void * hash_bs(const void *input_bs, uint64_t input_size)</div><div class="ttdoc">The SHA-1 algorithm itself, taking in a bytestring.</div><div class="ttdef"><b>Definition</b> <a href="#l00084">sha1.cpp:84</a></div></div>
<div class="ttc" id="asha1_8cpp_html_aa8dca7b867074164d5f45b0f3851269d"><div class="ttname"><a href="../../d8/d7a/sha1_8cpp.html#aa8dca7b867074164d5f45b0f3851269d">test</a></div><div class="ttdeci">static void test()</div><div class="ttdoc">Self-test implementations of well-known SHA-1 hashes.</div><div class="ttdef"><b>Definition</b> <a href="#l00221">sha1.cpp:221</a></div></div>
<div class="ttc" id="asha1_8cpp_html_aada0803ef851d831b7a290a924e3c228"><div class="ttname"><a href="../../d8/d7a/sha1_8cpp.html#aada0803ef851d831b7a290a924e3c228">hashing::sha1::sig2hex</a></div><div class="ttdeci">std::string sig2hex(void *sig)</div><div class="ttdoc">Transforms the 160-bit SHA-1 signature into a 40 char hex string.</div><div class="ttdef"><b>Definition</b> <a href="#l00067">sha1.cpp:67</a></div></div>
<div class="ttc" id="asha1_8cpp_html_ac9e1a11f44135b890dd10a00e73b5661"><div class="ttname"><a href="../../d8/d7a/sha1_8cpp.html#ac9e1a11f44135b890dd10a00e73b5661">interactive</a></div><div class="ttdeci">static void interactive()</div><div class="ttdoc">Puts user in a loop where inputs can be given and SHA-1 hash will be computed and printed.</div><div class="ttdef"><b>Definition</b> <a href="#l00275">sha1.cpp:275</a></div></div>
<div class="ttc" id="asha1_8cpp_html_acf6bd970f29a68702bdbdfe8338e45e0"><div class="ttname"><a href="../../d8/d7a/sha1_8cpp.html#acf6bd970f29a68702bdbdfe8338e45e0">hashing::sha1::leftRotate32bits</a></div><div class="ttdeci">uint32_t leftRotate32bits(uint32_t n, std::size_t rotate)</div><div class="ttdoc">Rotates the bits of a 32-bit unsigned integer.</div><div class="ttdef"><b>Definition</b> <a href="#l00058">sha1.cpp:58</a></div></div>
<div class="ttc" id="asha1_8cpp_html_ae66f6b31b5ad750f1fe042a706a4e3d4"><div class="ttname"><a href="../../d8/d7a/sha1_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4">main</a></div><div class="ttdeci">int main()</div><div class="ttdoc">Main function.</div><div class="ttdef"><b>Definition</b> <a href="#l00300">sha1.cpp:300</a></div></div>
<div class="ttc" id="ashell__sort2_8cpp_html_a7eb77daed2cf1513f6d68c47a1c2db1c"><div class="ttname"><a href="../../d4/d7a/shell__sort2_8cpp.html#a7eb77daed2cf1513f6d68c47a1c2db1c">compare</a></div><div class="ttdeci">int compare(const void *a, const void *b)</div><div class="ttdef"><b>Definition</b> <a href="../../d4/d7a/shell__sort2_8cpp_source.html#l00087">shell_sort2.cpp:87</a></div></div>
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