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<div class="title">Sha1.cpp</div> </div>
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<a href="_sha1_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">* Sha1.cpp</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">*</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">* Copyright (C) 1998</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">* Paul E. Jones <paulej@acm.org></span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">* All Rights Reserved.</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">*</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">*****************************************************************************</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">* $Id: sha1.cpp,v 1.6 2001/03/20 06:54:54 paulej Exp $</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment">*****************************************************************************</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">*</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment">* Description:</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment">* This class implements the Secure Hashing Standard as defined</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment">* in FIPS PUB 180-1 published April 17, 1995.</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment">*</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment">* The Secure Hashing Standard, which uses the Secure Hashing</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment">* Algorithm (SHA), produces a 160-bit message digest for a</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment">* given data stream. In theory, it is highly improbable that</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment">* two messages will produce the same message digest. Therefore,</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment">* this algorithm can serve as a means of providing a "fingerprint"</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment">* for a message.</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment">*</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment">* Portability Issues:</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment">* SHA-1 is defined in terms of 32-bit "words". This code was</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment">* written with the expectation that the processor has at least</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment">* a 32-bit machine word size. If the machine word size is larger,</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment">* the code should still function properly. One caveat to that</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment">* is that the input functions taking characters and character arrays</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment">* assume that only 8 bits of information are stored in each character.</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment">*</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment">* Caveats:</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment">* SHA-1 is designed to work with messages less than 2^64 bits long.</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment">* Although SHA-1 allows a message digest to be generated for</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment">* messages of any number of bits less than 2^64, this implementation</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment">* only works with messages with a length that is a multiple of 8</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment">* bits.</span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment">*</span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment">*/</span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> </div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> </div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="preprocessor">#include "<a class="code" href="_sha1_8h.html">Sha1.h</a>"</span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> </div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment">/* </span></div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment">* SHA1</span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment">*</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment">* Description:</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment">* This is the constructor for the sha1 class.</span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment">*</span></div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment">* Parameters:</span></div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment">* None.</span></div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment">*</span></div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment">* Returns:</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment">* Nothing.</span></div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment">*</span></div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="comment">* Comments:</span></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment">*</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment">*/</span></div>
<div class="line"><a name="l00058"></a><span class="lineno"><a class="code" href="class_s_h_a1.html#ad49a5108ffd6996b1133bf41224ff726"> 58</a></span> <a class="code" href="class_s_h_a1.html#ad49a5108ffd6996b1133bf41224ff726">SHA1::SHA1</a>()</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> {</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  <a class="code" href="class_s_h_a1.html#accec3092d91c84d7e71d32c681357119">Reset</a>();</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> }</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> </div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment">/* </span></div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="comment">* ~SHA1</span></div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="comment">*</span></div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="comment">* Description:</span></div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="comment">* This is the destructor for the sha1 class</span></div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="comment">*</span></div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="comment">* Parameters:</span></div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="comment">* None.</span></div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="comment">*</span></div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="comment">* Returns:</span></div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="comment">* Nothing.</span></div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="comment">*</span></div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="comment">* Comments:</span></div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="comment">*</span></div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="comment">*/</span></div>
<div class="line"><a name="l00078"></a><span class="lineno"><a class="code" href="class_s_h_a1.html#a8485d7c14fa29286cd3c7acfe438606d"> 78</a></span> <a class="code" href="class_s_h_a1.html#a8485d7c14fa29286cd3c7acfe438606d">SHA1::~SHA1</a>()</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> {</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="comment">// The destructor does nothing</span></div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> }</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span> </div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="comment">/* </span></div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="comment">* Reset</span></div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="comment">*</span></div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="comment">* Description:</span></div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="comment">* This function will initialize the sha1 class member variables</span></div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="comment">* in preparation for computing a new message digest.</span></div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="comment">*</span></div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="comment">* Parameters:</span></div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="comment">* None.</span></div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="comment">*</span></div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="comment">* Returns:</span></div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span> <span class="comment">* Nothing.</span></div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="comment">*</span></div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="comment">* Comments:</span></div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="comment">*</span></div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="comment">*/</span></div>
<div class="line"><a name="l00099"></a><span class="lineno"><a class="code" href="class_s_h_a1.html#accec3092d91c84d7e71d32c681357119"> 99</a></span> <span class="keywordtype">void</span> <a class="code" href="class_s_h_a1.html#accec3092d91c84d7e71d32c681357119">SHA1::Reset</a>()</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span> {</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  Length_Low = 0;</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  Length_High = 0;</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  Message_Block_Index = 0;</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span> </div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  H[0] = 0x67452301;</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  H[1] = 0xEFCDAB89;</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  H[2] = 0x98BADCFE;</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  H[3] = 0x10325476;</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  H[4] = 0xC3D2E1F0;</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span> </div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  Computed = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  Corrupted = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span> }</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span> </div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> <span class="comment">/* </span></div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span> <span class="comment">* Result</span></div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span> <span class="comment">*</span></div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <span class="comment">* Description:</span></div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span> <span class="comment">* This function will return the 160-bit message digest into the</span></div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span> <span class="comment">* array provided.</span></div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span> <span class="comment">*</span></div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span> <span class="comment">* Parameters:</span></div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span> <span class="comment">* message_digest_array: [out]</span></div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span> <span class="comment">* This is an array of five unsigned integers which will be filled</span></div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span> <span class="comment">* with the message digest that has been computed.</span></div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span> <span class="comment">*</span></div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span> <span class="comment">* Returns:</span></div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span> <span class="comment">* True if successful, false if it failed.</span></div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span> <span class="comment">*</span></div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span> <span class="comment">* Comments:</span></div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span> <span class="comment">*</span></div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span> <span class="comment">*/</span></div>
<div class="line"><a name="l00133"></a><span class="lineno"><a class="code" href="class_s_h_a1.html#ab374ecf64d54cc133805322370f3b0f1"> 133</a></span> <span class="keywordtype">bool</span> <a class="code" href="class_s_h_a1.html#ab374ecf64d54cc133805322370f3b0f1">SHA1::Result</a>(<span class="keywordtype">unsigned</span> *message_digest_array)</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span> {</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="keywordtype">int</span> i; <span class="comment">// Counter</span></div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span> </div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <span class="keywordflow">if</span> (Corrupted)</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  {</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  }</div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span> </div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  <span class="keywordflow">if</span> (!Computed)</div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  {</div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  PadMessage();</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  Computed = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  }</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span> </div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  <span class="keywordflow">for</span>(i = 0; i < 5; i++)</div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  {</div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  message_digest_array[i] = H[i];</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  }</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span> </div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span> }</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span> </div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span> <span class="comment">/* </span></div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span> <span class="comment">* Input</span></div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span> <span class="comment">*</span></div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span> <span class="comment">* Description:</span></div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span> <span class="comment">* This function accepts an array of octets as the next portion of</span></div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span> <span class="comment">* the message.</span></div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span> <span class="comment">*</span></div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span> <span class="comment">* Parameters:</span></div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span> <span class="comment">* message_array: [in]</span></div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span> <span class="comment">* An array of characters representing the next portion of the</span></div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span> <span class="comment">* message.</span></div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span> <span class="comment">*</span></div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span> <span class="comment">* Returns:</span></div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span> <span class="comment">* Nothing.</span></div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span> <span class="comment">*</span></div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span> <span class="comment">* Comments:</span></div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span> <span class="comment">*</span></div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span> <span class="comment">*/</span></div>
<div class="line"><a name="l00174"></a><span class="lineno"><a class="code" href="class_s_h_a1.html#a5612d5feb8202a4930aa271df8cbf102"> 174</a></span> <span class="keywordtype">void</span> <a class="code" href="class_s_h_a1.html#a5612d5feb8202a4930aa271df8cbf102">SHA1::Input</a>( <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *message_array,</div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span> <span class="keywordtype">unsigned</span> length)</div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span> {</div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <span class="keywordflow">if</span> (!length)</div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  {</div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  }</div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span> </div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  <span class="keywordflow">if</span> (Computed || Corrupted)</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>  Corrupted = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  <span class="keywordflow">return</span>;</div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  }</div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span> </div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  <span class="keywordflow">while</span>(length-- && !Corrupted)</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>  Message_Block[Message_Block_Index++] = (*message_array & 0xFF);</div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span> </div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  Length_Low += 8;</div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  Length_Low &= 0xFFFFFFFF; <span class="comment">// Force it to 32 bits</span></div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  <span class="keywordflow">if</span> (Length_Low == 0)</div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  {</div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  Length_High++;</div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  Length_High &= 0xFFFFFFFF; <span class="comment">// Force it to 32 bits</span></div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <span class="keywordflow">if</span> (Length_High == 0)</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>  Corrupted = <span class="keyword">true</span>; <span class="comment">// Message is too long</span></div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  }</div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  }</div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span> </div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  <span class="keywordflow">if</span> (Message_Block_Index == 64)</div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  {</div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  ProcessMessageBlock();</div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  }</div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span> </div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  message_array++;</div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  }</div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span> }</div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span> </div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span> <span class="comment">/* </span></div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span> <span class="comment">* Input</span></div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span> <span class="comment">*</span></div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span> <span class="comment">* Description:</span></div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span> <span class="comment">* This function accepts an array of octets as the next portion of</span></div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span> <span class="comment">* the message.</span></div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span> <span class="comment">*</span></div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span> <span class="comment">* Parameters:</span></div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span> <span class="comment">* message_array: [in]</span></div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span> <span class="comment">* An array of characters representing the next portion of the</span></div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span> <span class="comment">* message.</span></div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span> <span class="comment">* length: [in]</span></div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span> <span class="comment">* The length of the message_array</span></div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span> <span class="comment">*</span></div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span> <span class="comment">* Returns:</span></div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span> <span class="comment">* Nothing.</span></div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span> <span class="comment">*</span></div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span> <span class="comment">* Comments:</span></div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span> <span class="comment">*</span></div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span> <span class="comment">*/</span></div>
<div class="line"><a name="l00233"></a><span class="lineno"><a class="code" href="class_s_h_a1.html#a0c7555ddc781f3834c0a6218d1edc98e"> 233</a></span> <span class="keywordtype">void</span> <a class="code" href="class_s_h_a1.html#a5612d5feb8202a4930aa271df8cbf102">SHA1::Input</a>( <span class="keyword">const</span> <span class="keywordtype">char</span> *message_array,</div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span> <span class="keywordtype">unsigned</span> length)</div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span> {</div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  <a class="code" href="class_s_h_a1.html#a5612d5feb8202a4930aa271df8cbf102">Input</a>((<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *) message_array, length);</div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span> }</div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span> </div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span> <span class="comment">/* </span></div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span> <span class="comment">* Input</span></div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span> <span class="comment">*</span></div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span> <span class="comment">* Description:</span></div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span> <span class="comment">* This function accepts a single octets as the next message element.</span></div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span> <span class="comment">*</span></div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span> <span class="comment">* Parameters:</span></div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span> <span class="comment">* message_element: [in]</span></div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span> <span class="comment">* The next octet in the message.</span></div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span> <span class="comment">*</span></div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span> <span class="comment">* Returns:</span></div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span> <span class="comment">* Nothing.</span></div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span> <span class="comment">*</span></div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span> <span class="comment">* Comments:</span></div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span> <span class="comment">*</span></div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span> <span class="comment">*/</span></div>
<div class="line"><a name="l00255"></a><span class="lineno"><a class="code" href="class_s_h_a1.html#af4d21901eb9ed48d8f8a16d0ec166829"> 255</a></span> <span class="keywordtype">void</span> <a class="code" href="class_s_h_a1.html#a5612d5feb8202a4930aa271df8cbf102">SHA1::Input</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> message_element)</div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span> {</div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  <a class="code" href="class_s_h_a1.html#a5612d5feb8202a4930aa271df8cbf102">Input</a>(&message_element, 1);</div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span> }</div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span> </div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span> <span class="comment">/* </span></div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span> <span class="comment">* Input</span></div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span> <span class="comment">*</span></div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span> <span class="comment">* Description:</span></div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span> <span class="comment">* This function accepts a single octet as the next message element.</span></div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span> <span class="comment">*</span></div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span> <span class="comment">* Parameters:</span></div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span> <span class="comment">* message_element: [in]</span></div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span> <span class="comment">* The next octet in the message.</span></div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span> <span class="comment">*</span></div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span> <span class="comment">* Returns:</span></div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span> <span class="comment">* Nothing.</span></div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span> <span class="comment">*</span></div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span> <span class="comment">* Comments:</span></div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span> <span class="comment">*</span></div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span> <span class="comment">*/</span></div>
<div class="line"><a name="l00276"></a><span class="lineno"><a class="code" href="class_s_h_a1.html#a0fb5a35d1bc54e568d8774f966441c41"> 276</a></span> <span class="keywordtype">void</span> <a class="code" href="class_s_h_a1.html#a5612d5feb8202a4930aa271df8cbf102">SHA1::Input</a>(<span class="keywordtype">char</span> message_element)</div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span> {</div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  <a class="code" href="class_s_h_a1.html#a5612d5feb8202a4930aa271df8cbf102">Input</a>((<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *) &message_element, 1);</div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span> }</div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span> </div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span> <span class="comment">/* </span></div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span> <span class="comment">* operator<<</span></div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span> <span class="comment">*</span></div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span> <span class="comment">* Description:</span></div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span> <span class="comment">* This operator makes it convenient to provide character strings to</span></div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span> <span class="comment">* the SHA1 object for processing.</span></div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span> <span class="comment">*</span></div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span> <span class="comment">* Parameters:</span></div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span> <span class="comment">* message_array: [in]</span></div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span> <span class="comment">* The character array to take as input.</span></div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span> <span class="comment">*</span></div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span> <span class="comment">* Returns:</span></div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span> <span class="comment">* A reference to the SHA1 object.</span></div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span> <span class="comment">*</span></div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span> <span class="comment">* Comments:</span></div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span> <span class="comment">* Each character is assumed to hold 8 bits of information.</span></div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span> <span class="comment">*</span></div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span> <span class="comment">*/</span></div>
<div class="line"><a name="l00299"></a><span class="lineno"><a class="code" href="class_s_h_a1.html#a5d334b9a7847596c51e671ae8fded37b"> 299</a></span> <a class="code" href="class_s_h_a1.html">SHA1</a>& <a class="code" href="class_s_h_a1.html#a5d334b9a7847596c51e671ae8fded37b">SHA1::operator<<</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> *message_array)</div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span> {</div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  <span class="keyword">const</span> <span class="keywordtype">char</span> *p = message_array;</div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span> </div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  <span class="keywordflow">while</span>(*p)</div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  {</div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  <a class="code" href="class_s_h_a1.html#a5612d5feb8202a4930aa271df8cbf102">Input</a>(*p);</div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  p++;</div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  }</div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span> </div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span> }</div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span> </div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span> <span class="comment">/* </span></div>
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span> <span class="comment">* operator<<</span></div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span> <span class="comment">*</span></div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span> <span class="comment">* Description:</span></div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span> <span class="comment">* This operator makes it convenient to provide character strings to</span></div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span> <span class="comment">* the SHA1 object for processing.</span></div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span> <span class="comment">*</span></div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span> <span class="comment">* Parameters:</span></div>
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span> <span class="comment">* message_array: [in]</span></div>
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span> <span class="comment">* The character array to take as input.</span></div>
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span> <span class="comment">*</span></div>
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span> <span class="comment">* Returns:</span></div>
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span> <span class="comment">* A reference to the SHA1 object.</span></div>
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span> <span class="comment">*</span></div>
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span> <span class="comment">* Comments:</span></div>
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span> <span class="comment">* Each character is assumed to hold 8 bits of information.</span></div>
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span> <span class="comment">*</span></div>
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span> <span class="comment">*/</span></div>
<div class="line"><a name="l00330"></a><span class="lineno"><a class="code" href="class_s_h_a1.html#a4debec5cf6b08eb019c5fddb2f2ec68f"> 330</a></span> <a class="code" href="class_s_h_a1.html">SHA1</a>& <a class="code" href="class_s_h_a1.html#a5d334b9a7847596c51e671ae8fded37b">SHA1::operator<<</a>(<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *message_array)</div>
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span> {</div>
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *p = message_array;</div>
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span> </div>
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  <span class="keywordflow">while</span>(*p)</div>
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  {</div>
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  <a class="code" href="class_s_h_a1.html#a5612d5feb8202a4930aa271df8cbf102">Input</a>(*p);</div>
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  p++;</div>
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  }</div>
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span> </div>
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span> }</div>
<div class="line"><a name="l00342"></a><span class="lineno"> 342</span> </div>
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span> <span class="comment">/* </span></div>
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span> <span class="comment">* operator<<</span></div>
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span> <span class="comment">*</span></div>
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span> <span class="comment">* Description:</span></div>
<div class="line"><a name="l00347"></a><span class="lineno"> 347</span> <span class="comment">* This function provides the next octet in the message.</span></div>
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span> <span class="comment">*</span></div>
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span> <span class="comment">* Parameters:</span></div>
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span> <span class="comment">* message_element: [in]</span></div>
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span> <span class="comment">* The next octet in the message</span></div>
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span> <span class="comment">*</span></div>
<div class="line"><a name="l00353"></a><span class="lineno"> 353</span> <span class="comment">* Returns:</span></div>
<div class="line"><a name="l00354"></a><span class="lineno"> 354</span> <span class="comment">* A reference to the SHA1 object.</span></div>
<div class="line"><a name="l00355"></a><span class="lineno"> 355</span> <span class="comment">*</span></div>
<div class="line"><a name="l00356"></a><span class="lineno"> 356</span> <span class="comment">* Comments:</span></div>
<div class="line"><a name="l00357"></a><span class="lineno"> 357</span> <span class="comment">* The character is assumed to hold 8 bits of information.</span></div>
<div class="line"><a name="l00358"></a><span class="lineno"> 358</span> <span class="comment">*</span></div>
<div class="line"><a name="l00359"></a><span class="lineno"> 359</span> <span class="comment">*/</span></div>
<div class="line"><a name="l00360"></a><span class="lineno"><a class="code" href="class_s_h_a1.html#adfbd48831872d9b54bde3cd3963cfed2"> 360</a></span> <a class="code" href="class_s_h_a1.html">SHA1</a>& <a class="code" href="class_s_h_a1.html#a5d334b9a7847596c51e671ae8fded37b">SHA1::operator<<</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> message_element)</div>
<div class="line"><a name="l00361"></a><span class="lineno"> 361</span> {</div>
<div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  <a class="code" href="class_s_h_a1.html#a5612d5feb8202a4930aa271df8cbf102">Input</a>((<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *) &message_element, 1);</div>
<div class="line"><a name="l00363"></a><span class="lineno"> 363</span> </div>
<div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
<div class="line"><a name="l00365"></a><span class="lineno"> 365</span> }</div>
<div class="line"><a name="l00366"></a><span class="lineno"> 366</span> </div>
<div class="line"><a name="l00367"></a><span class="lineno"> 367</span> <span class="comment">/* </span></div>
<div class="line"><a name="l00368"></a><span class="lineno"> 368</span> <span class="comment">* operator<<</span></div>
<div class="line"><a name="l00369"></a><span class="lineno"> 369</span> <span class="comment">*</span></div>
<div class="line"><a name="l00370"></a><span class="lineno"> 370</span> <span class="comment">* Description:</span></div>
<div class="line"><a name="l00371"></a><span class="lineno"> 371</span> <span class="comment">* This function provides the next octet in the message.</span></div>
<div class="line"><a name="l00372"></a><span class="lineno"> 372</span> <span class="comment">*</span></div>
<div class="line"><a name="l00373"></a><span class="lineno"> 373</span> <span class="comment">* Parameters:</span></div>
<div class="line"><a name="l00374"></a><span class="lineno"> 374</span> <span class="comment">* message_element: [in]</span></div>
<div class="line"><a name="l00375"></a><span class="lineno"> 375</span> <span class="comment">* The next octet in the message</span></div>
<div class="line"><a name="l00376"></a><span class="lineno"> 376</span> <span class="comment">*</span></div>
<div class="line"><a name="l00377"></a><span class="lineno"> 377</span> <span class="comment">* Returns:</span></div>
<div class="line"><a name="l00378"></a><span class="lineno"> 378</span> <span class="comment">* A reference to the SHA1 object.</span></div>
<div class="line"><a name="l00379"></a><span class="lineno"> 379</span> <span class="comment">*</span></div>
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span> <span class="comment">* Comments:</span></div>
<div class="line"><a name="l00381"></a><span class="lineno"> 381</span> <span class="comment">* The character is assumed to hold 8 bits of information.</span></div>
<div class="line"><a name="l00382"></a><span class="lineno"> 382</span> <span class="comment">*</span></div>
<div class="line"><a name="l00383"></a><span class="lineno"> 383</span> <span class="comment">*/</span></div>
<div class="line"><a name="l00384"></a><span class="lineno"><a class="code" href="class_s_h_a1.html#a52d73d41b7fc85895aadb8cea3b822ab"> 384</a></span> <a class="code" href="class_s_h_a1.html">SHA1</a>& <a class="code" href="class_s_h_a1.html#a5d334b9a7847596c51e671ae8fded37b">SHA1::operator<<</a>(<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> message_element)</div>
<div class="line"><a name="l00385"></a><span class="lineno"> 385</span> {</div>
<div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  <a class="code" href="class_s_h_a1.html#a5612d5feb8202a4930aa271df8cbf102">Input</a>(&message_element, 1);</div>
<div class="line"><a name="l00387"></a><span class="lineno"> 387</span> </div>
<div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
<div class="line"><a name="l00389"></a><span class="lineno"> 389</span> }</div>
<div class="line"><a name="l00390"></a><span class="lineno"> 390</span> </div>
<div class="line"><a name="l00391"></a><span class="lineno"> 391</span> <span class="comment">/* </span></div>
<div class="line"><a name="l00392"></a><span class="lineno"> 392</span> <span class="comment">* ProcessMessageBlock</span></div>
<div class="line"><a name="l00393"></a><span class="lineno"> 393</span> <span class="comment">*</span></div>
<div class="line"><a name="l00394"></a><span class="lineno"> 394</span> <span class="comment">* Description:</span></div>
<div class="line"><a name="l00395"></a><span class="lineno"> 395</span> <span class="comment">* This function will process the next 512 bits of the message</span></div>
<div class="line"><a name="l00396"></a><span class="lineno"> 396</span> <span class="comment">* stored in the Message_Block array.</span></div>
<div class="line"><a name="l00397"></a><span class="lineno"> 397</span> <span class="comment">*</span></div>
<div class="line"><a name="l00398"></a><span class="lineno"> 398</span> <span class="comment">* Parameters:</span></div>
<div class="line"><a name="l00399"></a><span class="lineno"> 399</span> <span class="comment">* None.</span></div>
<div class="line"><a name="l00400"></a><span class="lineno"> 400</span> <span class="comment">*</span></div>
<div class="line"><a name="l00401"></a><span class="lineno"> 401</span> <span class="comment">* Returns:</span></div>
<div class="line"><a name="l00402"></a><span class="lineno"> 402</span> <span class="comment">* Nothing.</span></div>
<div class="line"><a name="l00403"></a><span class="lineno"> 403</span> <span class="comment">*</span></div>
<div class="line"><a name="l00404"></a><span class="lineno"> 404</span> <span class="comment">* Comments:</span></div>
<div class="line"><a name="l00405"></a><span class="lineno"> 405</span> <span class="comment">* Many of the variable names in this function, especially the single</span></div>
<div class="line"><a name="l00406"></a><span class="lineno"> 406</span> <span class="comment">* character names, were used because those were the names used</span></div>
<div class="line"><a name="l00407"></a><span class="lineno"> 407</span> <span class="comment">* in the publication.</span></div>
<div class="line"><a name="l00408"></a><span class="lineno"> 408</span> <span class="comment">*</span></div>
<div class="line"><a name="l00409"></a><span class="lineno"> 409</span> <span class="comment">*/</span></div>
<div class="line"><a name="l00410"></a><span class="lineno"> 410</span> <span class="keywordtype">void</span> SHA1::ProcessMessageBlock()</div>
<div class="line"><a name="l00411"></a><span class="lineno"> 411</span> {</div>
<div class="line"><a name="l00412"></a><span class="lineno"> 412</span>  <span class="keyword">const</span> <span class="keywordtype">unsigned</span> K[] = { <span class="comment">// Constants defined for SHA-1</span></div>
<div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  0x5A827999,</div>
<div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  0x6ED9EBA1,</div>
<div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  0x8F1BBCDC,</div>
<div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  0xCA62C1D6</div>
<div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  };</div>
<div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  <span class="keywordtype">int</span> t; <span class="comment">// Loop counter</span></div>
<div class="line"><a name="l00419"></a><span class="lineno"> 419</span>  <span class="keywordtype">unsigned</span> temp; <span class="comment">// Temporary word value</span></div>
<div class="line"><a name="l00420"></a><span class="lineno"> 420</span>  <span class="keywordtype">unsigned</span> W[80]; <span class="comment">// Word sequence</span></div>
<div class="line"><a name="l00421"></a><span class="lineno"> 421</span>  <span class="keywordtype">unsigned</span> A, B, C, D, E; <span class="comment">// Word buffers</span></div>
<div class="line"><a name="l00422"></a><span class="lineno"> 422</span> </div>
<div class="line"><a name="l00423"></a><span class="lineno"> 423</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00424"></a><span class="lineno"> 424</span> <span class="comment"> * Initialize the first 16 words in the array W</span></div>
<div class="line"><a name="l00425"></a><span class="lineno"> 425</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  <span class="keywordflow">for</span>(t = 0; t < 16; t++)</div>
<div class="line"><a name="l00427"></a><span class="lineno"> 427</span>  {</div>
<div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  W[t] = Message_Block[t * 4] << 24;</div>
<div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  W[t] |= Message_Block[t * 4 + 1] << 16;</div>
<div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  W[t] |= Message_Block[t * 4 + 2] << 8;</div>
<div class="line"><a name="l00431"></a><span class="lineno"> 431</span>  W[t] |= Message_Block[t * 4 + 3];</div>
<div class="line"><a name="l00432"></a><span class="lineno"> 432</span>  }</div>
<div class="line"><a name="l00433"></a><span class="lineno"> 433</span> </div>
<div class="line"><a name="l00434"></a><span class="lineno"> 434</span>  <span class="keywordflow">for</span>(t = 16; t < 80; t++)</div>
<div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  {</div>
<div class="line"><a name="l00436"></a><span class="lineno"> 436</span>  W[t] = CircularShift(1,W[t-3] ^ W[t-8] ^ W[t-14] ^ W[t-16]);</div>
<div class="line"><a name="l00437"></a><span class="lineno"> 437</span>  }</div>
<div class="line"><a name="l00438"></a><span class="lineno"> 438</span> </div>
<div class="line"><a name="l00439"></a><span class="lineno"> 439</span>  A = H[0];</div>
<div class="line"><a name="l00440"></a><span class="lineno"> 440</span>  B = H[1];</div>
<div class="line"><a name="l00441"></a><span class="lineno"> 441</span>  C = H[2];</div>
<div class="line"><a name="l00442"></a><span class="lineno"> 442</span>  D = H[3];</div>
<div class="line"><a name="l00443"></a><span class="lineno"> 443</span>  E = H[4];</div>
<div class="line"><a name="l00444"></a><span class="lineno"> 444</span> </div>
<div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  <span class="keywordflow">for</span>(t = 0; t < 20; t++)</div>
<div class="line"><a name="l00446"></a><span class="lineno"> 446</span>  {</div>
<div class="line"><a name="l00447"></a><span class="lineno"> 447</span>  temp = CircularShift(5,A) + ((B & C) | ((~B) & D)) + E + W[t] + K[0];</div>
<div class="line"><a name="l00448"></a><span class="lineno"> 448</span>  temp &= 0xFFFFFFFF;</div>
<div class="line"><a name="l00449"></a><span class="lineno"> 449</span>  E = D;</div>
<div class="line"><a name="l00450"></a><span class="lineno"> 450</span>  D = C;</div>
<div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  C = CircularShift(30,B);</div>
<div class="line"><a name="l00452"></a><span class="lineno"> 452</span>  B = A;</div>
<div class="line"><a name="l00453"></a><span class="lineno"> 453</span>  A = temp;</div>
<div class="line"><a name="l00454"></a><span class="lineno"> 454</span>  }</div>
<div class="line"><a name="l00455"></a><span class="lineno"> 455</span> </div>
<div class="line"><a name="l00456"></a><span class="lineno"> 456</span>  <span class="keywordflow">for</span>(t = 20; t < 40; t++)</div>
<div class="line"><a name="l00457"></a><span class="lineno"> 457</span>  {</div>
<div class="line"><a name="l00458"></a><span class="lineno"> 458</span>  temp = CircularShift(5,A) + (B ^ C ^ D) + E + W[t] + K[1];</div>
<div class="line"><a name="l00459"></a><span class="lineno"> 459</span>  temp &= 0xFFFFFFFF;</div>
<div class="line"><a name="l00460"></a><span class="lineno"> 460</span>  E = D;</div>
<div class="line"><a name="l00461"></a><span class="lineno"> 461</span>  D = C;</div>
<div class="line"><a name="l00462"></a><span class="lineno"> 462</span>  C = CircularShift(30,B);</div>
<div class="line"><a name="l00463"></a><span class="lineno"> 463</span>  B = A;</div>
<div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  A = temp;</div>
<div class="line"><a name="l00465"></a><span class="lineno"> 465</span>  }</div>
<div class="line"><a name="l00466"></a><span class="lineno"> 466</span> </div>
<div class="line"><a name="l00467"></a><span class="lineno"> 467</span>  <span class="keywordflow">for</span>(t = 40; t < 60; t++)</div>
<div class="line"><a name="l00468"></a><span class="lineno"> 468</span>  {</div>
<div class="line"><a name="l00469"></a><span class="lineno"> 469</span>  temp = CircularShift(5,A) +</div>
<div class="line"><a name="l00470"></a><span class="lineno"> 470</span>  ((B & C) | (B & D) | (C & D)) + E + W[t] + K[2];</div>
<div class="line"><a name="l00471"></a><span class="lineno"> 471</span>  temp &= 0xFFFFFFFF;</div>
<div class="line"><a name="l00472"></a><span class="lineno"> 472</span>  E = D;</div>
<div class="line"><a name="l00473"></a><span class="lineno"> 473</span>  D = C;</div>
<div class="line"><a name="l00474"></a><span class="lineno"> 474</span>  C = CircularShift(30,B);</div>
<div class="line"><a name="l00475"></a><span class="lineno"> 475</span>  B = A;</div>
<div class="line"><a name="l00476"></a><span class="lineno"> 476</span>  A = temp;</div>
<div class="line"><a name="l00477"></a><span class="lineno"> 477</span>  }</div>
<div class="line"><a name="l00478"></a><span class="lineno"> 478</span> </div>
<div class="line"><a name="l00479"></a><span class="lineno"> 479</span>  <span class="keywordflow">for</span>(t = 60; t < 80; t++)</div>
<div class="line"><a name="l00480"></a><span class="lineno"> 480</span>  {</div>
<div class="line"><a name="l00481"></a><span class="lineno"> 481</span>  temp = CircularShift(5,A) + (B ^ C ^ D) + E + W[t] + K[3];</div>
<div class="line"><a name="l00482"></a><span class="lineno"> 482</span>  temp &= 0xFFFFFFFF;</div>
<div class="line"><a name="l00483"></a><span class="lineno"> 483</span>  E = D;</div>
<div class="line"><a name="l00484"></a><span class="lineno"> 484</span>  D = C;</div>
<div class="line"><a name="l00485"></a><span class="lineno"> 485</span>  C = CircularShift(30,B);</div>
<div class="line"><a name="l00486"></a><span class="lineno"> 486</span>  B = A;</div>
<div class="line"><a name="l00487"></a><span class="lineno"> 487</span>  A = temp;</div>
<div class="line"><a name="l00488"></a><span class="lineno"> 488</span>  }</div>
<div class="line"><a name="l00489"></a><span class="lineno"> 489</span> </div>
<div class="line"><a name="l00490"></a><span class="lineno"> 490</span>  H[0] = (H[0] + A) & 0xFFFFFFFF;</div>
<div class="line"><a name="l00491"></a><span class="lineno"> 491</span>  H[1] = (H[1] + B) & 0xFFFFFFFF;</div>
<div class="line"><a name="l00492"></a><span class="lineno"> 492</span>  H[2] = (H[2] + C) & 0xFFFFFFFF;</div>
<div class="line"><a name="l00493"></a><span class="lineno"> 493</span>  H[3] = (H[3] + D) & 0xFFFFFFFF;</div>
<div class="line"><a name="l00494"></a><span class="lineno"> 494</span>  H[4] = (H[4] + E) & 0xFFFFFFFF;</div>
<div class="line"><a name="l00495"></a><span class="lineno"> 495</span> </div>
<div class="line"><a name="l00496"></a><span class="lineno"> 496</span>  Message_Block_Index = 0;</div>
<div class="line"><a name="l00497"></a><span class="lineno"> 497</span> }</div>
<div class="line"><a name="l00498"></a><span class="lineno"> 498</span> </div>
<div class="line"><a name="l00499"></a><span class="lineno"> 499</span> <span class="comment">/* </span></div>
<div class="line"><a name="l00500"></a><span class="lineno"> 500</span> <span class="comment">* PadMessage</span></div>
<div class="line"><a name="l00501"></a><span class="lineno"> 501</span> <span class="comment">*</span></div>
<div class="line"><a name="l00502"></a><span class="lineno"> 502</span> <span class="comment">* Description:</span></div>
<div class="line"><a name="l00503"></a><span class="lineno"> 503</span> <span class="comment">* According to the standard, the message must be padded to an even</span></div>
<div class="line"><a name="l00504"></a><span class="lineno"> 504</span> <span class="comment">* 512 bits. The first padding bit must be a '1'. The last 64 bits</span></div>
<div class="line"><a name="l00505"></a><span class="lineno"> 505</span> <span class="comment">* represent the length of the original message. All bits in between</span></div>
<div class="line"><a name="l00506"></a><span class="lineno"> 506</span> <span class="comment">* should be 0. This function will pad the message according to those</span></div>
<div class="line"><a name="l00507"></a><span class="lineno"> 507</span> <span class="comment">* rules by filling the message_block array accordingly. It will also</span></div>
<div class="line"><a name="l00508"></a><span class="lineno"> 508</span> <span class="comment">* call ProcessMessageBlock() appropriately. When it returns, it</span></div>
<div class="line"><a name="l00509"></a><span class="lineno"> 509</span> <span class="comment">* can be assumed that the message digest has been computed.</span></div>
<div class="line"><a name="l00510"></a><span class="lineno"> 510</span> <span class="comment">*</span></div>
<div class="line"><a name="l00511"></a><span class="lineno"> 511</span> <span class="comment">* Parameters:</span></div>
<div class="line"><a name="l00512"></a><span class="lineno"> 512</span> <span class="comment">* None.</span></div>
<div class="line"><a name="l00513"></a><span class="lineno"> 513</span> <span class="comment">*</span></div>
<div class="line"><a name="l00514"></a><span class="lineno"> 514</span> <span class="comment">* Returns:</span></div>
<div class="line"><a name="l00515"></a><span class="lineno"> 515</span> <span class="comment">* Nothing.</span></div>
<div class="line"><a name="l00516"></a><span class="lineno"> 516</span> <span class="comment">*</span></div>
<div class="line"><a name="l00517"></a><span class="lineno"> 517</span> <span class="comment">* Comments:</span></div>
<div class="line"><a name="l00518"></a><span class="lineno"> 518</span> <span class="comment">*</span></div>
<div class="line"><a name="l00519"></a><span class="lineno"> 519</span> <span class="comment">*/</span></div>
<div class="line"><a name="l00520"></a><span class="lineno"> 520</span> <span class="keywordtype">void</span> SHA1::PadMessage()</div>
<div class="line"><a name="l00521"></a><span class="lineno"> 521</span> {</div>
<div class="line"><a name="l00522"></a><span class="lineno"> 522</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00523"></a><span class="lineno"> 523</span> <span class="comment"> * Check to see if the current message block is too small to hold</span></div>
<div class="line"><a name="l00524"></a><span class="lineno"> 524</span> <span class="comment"> * the initial padding bits and length. If so, we will pad the</span></div>
<div class="line"><a name="l00525"></a><span class="lineno"> 525</span> <span class="comment"> * block, process it, and then continue padding into a second block.</span></div>
<div class="line"><a name="l00526"></a><span class="lineno"> 526</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00527"></a><span class="lineno"> 527</span>  <span class="keywordflow">if</span> (Message_Block_Index > 55)</div>
<div class="line"><a name="l00528"></a><span class="lineno"> 528</span>  {</div>
<div class="line"><a name="l00529"></a><span class="lineno"> 529</span>  Message_Block[Message_Block_Index++] = 0x80;</div>
<div class="line"><a name="l00530"></a><span class="lineno"> 530</span>  <span class="keywordflow">while</span>(Message_Block_Index < 64)</div>
<div class="line"><a name="l00531"></a><span class="lineno"> 531</span>  {</div>
<div class="line"><a name="l00532"></a><span class="lineno"> 532</span>  Message_Block[Message_Block_Index++] = 0;</div>
<div class="line"><a name="l00533"></a><span class="lineno"> 533</span>  }</div>
<div class="line"><a name="l00534"></a><span class="lineno"> 534</span> </div>
<div class="line"><a name="l00535"></a><span class="lineno"> 535</span>  ProcessMessageBlock();</div>
<div class="line"><a name="l00536"></a><span class="lineno"> 536</span> </div>
<div class="line"><a name="l00537"></a><span class="lineno"> 537</span>  <span class="keywordflow">while</span>(Message_Block_Index < 56)</div>
<div class="line"><a name="l00538"></a><span class="lineno"> 538</span>  {</div>
<div class="line"><a name="l00539"></a><span class="lineno"> 539</span>  Message_Block[Message_Block_Index++] = 0;</div>
<div class="line"><a name="l00540"></a><span class="lineno"> 540</span>  }</div>
<div class="line"><a name="l00541"></a><span class="lineno"> 541</span>  }</div>
<div class="line"><a name="l00542"></a><span class="lineno"> 542</span>  <span class="keywordflow">else</span></div>
<div class="line"><a name="l00543"></a><span class="lineno"> 543</span>  {</div>
<div class="line"><a name="l00544"></a><span class="lineno"> 544</span>  Message_Block[Message_Block_Index++] = 0x80;</div>
<div class="line"><a name="l00545"></a><span class="lineno"> 545</span>  <span class="keywordflow">while</span>(Message_Block_Index < 56)</div>
<div class="line"><a name="l00546"></a><span class="lineno"> 546</span>  {</div>
<div class="line"><a name="l00547"></a><span class="lineno"> 547</span>  Message_Block[Message_Block_Index++] = 0;</div>
<div class="line"><a name="l00548"></a><span class="lineno"> 548</span>  }</div>
<div class="line"><a name="l00549"></a><span class="lineno"> 549</span> </div>
<div class="line"><a name="l00550"></a><span class="lineno"> 550</span>  }</div>
<div class="line"><a name="l00551"></a><span class="lineno"> 551</span> </div>
<div class="line"><a name="l00552"></a><span class="lineno"> 552</span>  <span class="comment">/*</span></div>
<div class="line"><a name="l00553"></a><span class="lineno"> 553</span> <span class="comment"> * Store the message length as the last 8 octets</span></div>
<div class="line"><a name="l00554"></a><span class="lineno"> 554</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00555"></a><span class="lineno"> 555</span>  Message_Block[56] = (Length_High >> 24) & 0xFF;</div>
<div class="line"><a name="l00556"></a><span class="lineno"> 556</span>  Message_Block[57] = (Length_High >> 16) & 0xFF;</div>
<div class="line"><a name="l00557"></a><span class="lineno"> 557</span>  Message_Block[58] = (Length_High >> 8) & 0xFF;</div>
<div class="line"><a name="l00558"></a><span class="lineno"> 558</span>  Message_Block[59] = (Length_High) & 0xFF;</div>
<div class="line"><a name="l00559"></a><span class="lineno"> 559</span>  Message_Block[60] = (Length_Low >> 24) & 0xFF;</div>
<div class="line"><a name="l00560"></a><span class="lineno"> 560</span>  Message_Block[61] = (Length_Low >> 16) & 0xFF;</div>
<div class="line"><a name="l00561"></a><span class="lineno"> 561</span>  Message_Block[62] = (Length_Low >> 8) & 0xFF;</div>
<div class="line"><a name="l00562"></a><span class="lineno"> 562</span>  Message_Block[63] = (Length_Low) & 0xFF;</div>
<div class="line"><a name="l00563"></a><span class="lineno"> 563</span> </div>
<div class="line"><a name="l00564"></a><span class="lineno"> 564</span>  ProcessMessageBlock();</div>
<div class="line"><a name="l00565"></a><span class="lineno"> 565</span> }</div>
<div class="line"><a name="l00566"></a><span class="lineno"> 566</span> </div>
<div class="line"><a name="l00567"></a><span class="lineno"> 567</span> </div>
<div class="line"><a name="l00568"></a><span class="lineno"> 568</span> <span class="comment">/* </span></div>
<div class="line"><a name="l00569"></a><span class="lineno"> 569</span> <span class="comment">* CircularShift</span></div>
<div class="line"><a name="l00570"></a><span class="lineno"> 570</span> <span class="comment">*</span></div>
<div class="line"><a name="l00571"></a><span class="lineno"> 571</span> <span class="comment">* Description:</span></div>
<div class="line"><a name="l00572"></a><span class="lineno"> 572</span> <span class="comment">* This member function will perform a circular shifting operation.</span></div>
<div class="line"><a name="l00573"></a><span class="lineno"> 573</span> <span class="comment">*</span></div>
<div class="line"><a name="l00574"></a><span class="lineno"> 574</span> <span class="comment">* Parameters:</span></div>
<div class="line"><a name="l00575"></a><span class="lineno"> 575</span> <span class="comment">* bits: [in]</span></div>
<div class="line"><a name="l00576"></a><span class="lineno"> 576</span> <span class="comment">* The number of bits to shift (1-31)</span></div>
<div class="line"><a name="l00577"></a><span class="lineno"> 577</span> <span class="comment">* word: [in]</span></div>
<div class="line"><a name="l00578"></a><span class="lineno"> 578</span> <span class="comment">* The value to shift (assumes a 32-bit integer)</span></div>
<div class="line"><a name="l00579"></a><span class="lineno"> 579</span> <span class="comment">*</span></div>
<div class="line"><a name="l00580"></a><span class="lineno"> 580</span> <span class="comment">* Returns:</span></div>
<div class="line"><a name="l00581"></a><span class="lineno"> 581</span> <span class="comment">* The shifted value.</span></div>
<div class="line"><a name="l00582"></a><span class="lineno"> 582</span> <span class="comment">*</span></div>
<div class="line"><a name="l00583"></a><span class="lineno"> 583</span> <span class="comment">* Comments:</span></div>
<div class="line"><a name="l00584"></a><span class="lineno"> 584</span> <span class="comment">*</span></div>
<div class="line"><a name="l00585"></a><span class="lineno"> 585</span> <span class="comment">*/</span></div>
<div class="line"><a name="l00586"></a><span class="lineno"> 586</span> <span class="keywordtype">unsigned</span> SHA1::CircularShift(<span class="keywordtype">int</span> bits, <span class="keywordtype">unsigned</span> word)</div>
<div class="line"><a name="l00587"></a><span class="lineno"> 587</span> {</div>
<div class="line"><a name="l00588"></a><span class="lineno"> 588</span>  <span class="keywordflow">return</span> ((word << bits) & 0xFFFFFFFF) | ((word & 0xFFFFFFFF) >> (32-bits));</div>
<div class="line"><a name="l00589"></a><span class="lineno"> 589</span> }</div>
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