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<div id="projectname">Crypto++
 <span id="projectnumber">7.0</span>
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<div id="projectbrief">Free C++ class library of cryptographic schemes</div>
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<div class="title">rng.cpp</div> </div>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// rng.cpp - originally written and placed in the public domain by Wei Dai</span></div><div class="line"><a name="l00002"></a><span class="lineno"> 2</span> </div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="preprocessor">#include "<a class="code" href="pch_8h.html">pch.h</a>"</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> </div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="preprocessor">#include "<a class="code" href="rng_8h.html">rng.h</a>"</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="preprocessor">#include "<a class="code" href="fips140_8h.html">fips140.h</a>"</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> </div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="preprocessor">#include <time.h></span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="preprocessor">#include <math.h></span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> </div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> NAMESPACE_BEGIN(<a class="code" href="namespace_crypto_p_p.html">CryptoPP</a>)</div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> </div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment">// linear congruential generator</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment">// originally by William S. England</span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> </div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment">// do not use for cryptographic purposes</span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> </div><div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment">/*</span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment">** Original_numbers are the original published m and q in the</span></div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment">** ACM article above. John Burton has furnished numbers for</span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment">** a reportedly better generator. The new numbers are now</span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment">** used in this program by default.</span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment">*/</span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> </div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#ifndef LCRNG_ORIGINAL_NUMBERS</span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="keyword">const</span> word32 LC_RNG::m=2147483647L;</div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="keyword">const</span> word32 LC_RNG::q=44488L;</div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span> </div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="keyword">const</span> word16 LC_RNG::a=(<span class="keywordtype">unsigned</span> int)48271L;</div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="keyword">const</span> word16 LC_RNG::r=3399;</div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="keyword">const</span> word32 LC_RNG::m=2147483647L;</div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="keyword">const</span> word32 LC_RNG::q=127773L;</div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> </div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="keyword">const</span> word16 LC_RNG::a=16807;</div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="keyword">const</span> word16 LC_RNG::r=2836;</div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span> </div><div class="line"><a name="l00039"></a><span class="lineno"><a class="line" href="class_l_c___r_n_g.html#ab2f22bacb77dab778008f3301daa3ad6"> 39</a></span> <span class="keywordtype">void</span> <a class="code" href="class_l_c___r_n_g.html#ab2f22bacb77dab778008f3301daa3ad6">LC_RNG::GenerateBlock</a>(byte *output, <span class="keywordtype">size_t</span> size)</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="keywordflow">while</span> (size--)</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>  word32 hi = seed/q;</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  word32 lo = seed%q;</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> </div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="keywordtype">long</span> test = a*lo - r*hi;</div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> </div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <span class="keywordflow">if</span> (test > 0)</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  seed = test;</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keywordflow">else</span></div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  seed = test+ m;</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> </div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  *output++ = byte((GETBYTE(seed, 0) ^ GETBYTE(seed, 1) ^ GETBYTE(seed, 2) ^ GETBYTE(seed, 3)));</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  }</div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> }</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</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"> 58</span> </div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="preprocessor">#ifndef CRYPTOPP_IMPORTS</span></div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> </div><div class="line"><a name="l00061"></a><span class="lineno"><a class="line" href="class_x917_r_n_g.html#a8bda7e471e98f94c3dd076a7fdbe5d1c"> 61</a></span> <a class="code" href="class_x917_r_n_g.html#a8bda7e471e98f94c3dd076a7fdbe5d1c">X917RNG::X917RNG</a>(<a class="code" href="class_block_transformation.html">BlockTransformation</a> *c, <span class="keyword">const</span> byte *seed, <span class="keyword">const</span> byte *deterministicTimeVector)</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  : m_cipher(c),</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  m_size(m_cipher-><a class="code" href="namespace_name.html#aa93e40d0259a59959d270e6c82a9f1eb">BlockSize</a>()),</div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  m_datetime(m_size),</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  m_randseed(seed, m_size),</div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  m_lastBlock(m_size),</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  m_deterministicTimeVector(deterministicTimeVector, deterministicTimeVector ? m_size : 0)</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> {</div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="comment">// Valgrind finding, http://github.com/weidai11/cryptopp/issues/105</span></div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="comment">// Garbage in the tail creates a non-conforming X9.17 or X9.31 generator.</span></div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <span class="keywordflow">if</span> (m_size > 8)</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  {</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  memset(m_datetime, 0x00, m_size);</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  memset(m_lastBlock, 0x00, m_size);</div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  }</div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span> </div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  <span class="keywordflow">if</span> (!deterministicTimeVector)</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  {</div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  time_t tstamp1 = ::time(NULLPTR);</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <a class="code" href="misc_8h.html#a6aaae7768600b9d735a5e1b8192035f8">xorbuf</a>(m_datetime, (byte *)&tstamp1, <a class="code" href="misc_8h.html#ac8391e7d9d613a6c401787d2cdab1f51">UnsignedMin</a>(<span class="keyword">sizeof</span>(tstamp1), m_size));</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  m_cipher-><a class="code" href="class_block_transformation.html#a93b18a5b11cd6f61bf19624192575d1d">ProcessBlock</a>(m_datetime);</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  clock_t tstamp2 = clock();</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  <a class="code" href="misc_8h.html#a6aaae7768600b9d735a5e1b8192035f8">xorbuf</a>(m_datetime, (byte *)&tstamp2, <a class="code" href="misc_8h.html#ac8391e7d9d613a6c401787d2cdab1f51">UnsignedMin</a>(<span class="keyword">sizeof</span>(tstamp2), m_size));</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  m_cipher-><a class="code" href="class_block_transformation.html#a93b18a5b11cd6f61bf19624192575d1d">ProcessBlock</a>(m_datetime);</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  }</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span> </div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="comment">// for FIPS 140-2</span></div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="comment">// GenerateBlock(m_lastBlock, m_size);</span></div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span> </div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="comment">// Make explicit call to avoid virtual-dispatch findings in ctor</span></div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <a class="code" href="class_array_sink.html">ArraySink</a> target(m_lastBlock, m_size);</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <a class="code" href="class_x917_r_n_g.html#a5b84223763a1f90ddc55e87769df7bf9">X917RNG::GenerateIntoBufferedTransformation</a>(target, <a class="code" href="cryptlib_8h.html#a9a69ab5a5e0f58279c43f4f51809c84a">DEFAULT_CHANNEL</a>, m_size);</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span> }</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span> </div><div class="line"><a name="l00095"></a><span class="lineno"><a class="line" href="class_x917_r_n_g.html#a5b84223763a1f90ddc55e87769df7bf9"> 95</a></span> <span class="keywordtype">void</span> <a class="code" href="class_x917_r_n_g.html#a5b84223763a1f90ddc55e87769df7bf9">X917RNG::GenerateIntoBufferedTransformation</a>(<a class="code" href="class_buffered_transformation.html">BufferedTransformation</a> &target, <span class="keyword">const</span> std::string &channel, lword size)</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span> {</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="keywordflow">while</span> (size > 0)</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  {</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="comment">// calculate new enciphered timestamp</span></div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  <span class="keywordflow">if</span> (m_deterministicTimeVector.<a class="code" href="class_sec_block.html#af5999bffe3193e62719cc0792b0282a7">size</a>())</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  {</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  m_cipher-><a class="code" href="class_block_transformation.html#a93b18a5b11cd6f61bf19624192575d1d">ProcessBlock</a>(m_deterministicTimeVector, m_datetime);</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <a class="code" href="misc_8h.html#a44fad9d8c25e8aca3a7ee29345516f0a">IncrementCounterByOne</a>(m_deterministicTimeVector, m_size);</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>  <span class="keywordflow">else</span></div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  {</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  clock_t c = clock();</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <a class="code" href="misc_8h.html#a6aaae7768600b9d735a5e1b8192035f8">xorbuf</a>(m_datetime, (byte *)&c, <a class="code" href="misc_8h.html#ac8391e7d9d613a6c401787d2cdab1f51">UnsignedMin</a>(<span class="keyword">sizeof</span>(c), m_size));</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  time_t t = ::time(NULLPTR);</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <a class="code" href="misc_8h.html#a6aaae7768600b9d735a5e1b8192035f8">xorbuf</a>(m_datetime+m_size-<a class="code" href="misc_8h.html#ac8391e7d9d613a6c401787d2cdab1f51">UnsignedMin</a>(<span class="keyword">sizeof</span>(t), m_size), (byte *)&t, <a class="code" href="misc_8h.html#ac8391e7d9d613a6c401787d2cdab1f51">UnsignedMin</a>(<span class="keyword">sizeof</span>(t), m_size));</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  m_cipher-><a class="code" href="class_block_transformation.html#a93b18a5b11cd6f61bf19624192575d1d">ProcessBlock</a>(m_datetime);</div><div class="line"><a name="l00112"></a><span class="lineno"> 112</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>  <span class="comment">// combine enciphered timestamp with seed</span></div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  <a class="code" href="misc_8h.html#a6aaae7768600b9d735a5e1b8192035f8">xorbuf</a>(m_randseed, m_datetime, m_size);</div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span> </div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <span class="comment">// generate a new block of random bytes</span></div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  m_cipher-><a class="code" href="class_block_transformation.html#a93b18a5b11cd6f61bf19624192575d1d">ProcessBlock</a>(m_randseed);</div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keywordflow">if</span> (memcmp(m_lastBlock, m_randseed, m_size) == 0)</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <span class="keywordflow">throw</span> <a class="code" href="class_self_test_failure.html">SelfTestFailure</a>(<span class="stringliteral">"X917RNG: Continuous random number generator test failed."</span>);</div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span> </div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="comment">// output random bytes</span></div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="keywordtype">size_t</span> len = <a class="code" href="misc_8h.html#ac8391e7d9d613a6c401787d2cdab1f51">UnsignedMin</a>(m_size, size);</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  target.<a class="code" href="class_buffered_transformation.html#a97a60b54fafdb3df59e1457ef629fc5f">ChannelPut</a>(channel, m_randseed, len);</div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  size -= len;</div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span> </div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <span class="comment">// compute new seed vector</span></div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  memcpy(m_lastBlock, m_randseed, m_size);</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  <a class="code" href="misc_8h.html#a6aaae7768600b9d735a5e1b8192035f8">xorbuf</a>(m_randseed, m_datetime, m_size);</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  m_cipher-><a class="code" href="class_block_transformation.html#a93b18a5b11cd6f61bf19624192575d1d">ProcessBlock</a>(m_randseed);</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  }</div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span> }</div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span> </div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span> </div><div class="line"><a name="l00136"></a><span class="lineno"><a class="line" href="class_maurer_randomness_test.html#ab7e148c7e8d213b8f77d1336e47857c2"> 136</a></span> <a class="code" href="class_maurer_randomness_test.html#ab7e148c7e8d213b8f77d1336e47857c2">MaurerRandomnessTest::MaurerRandomnessTest</a>()</div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  : sum(0.0), n(0)</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">for</span> (<span class="keywordtype">unsigned</span> i=0; i<V; i++)</div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  tab[i] = 0;</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> </div><div class="line"><a name="l00143"></a><span class="lineno"><a class="line" href="class_maurer_randomness_test.html#ae2629df58de48eafc8b8d9f0b060ff98"> 143</a></span> <span class="keywordtype">size_t</span> <a class="code" href="class_maurer_randomness_test.html#ae2629df58de48eafc8b8d9f0b060ff98">MaurerRandomnessTest::Put2</a>(<span class="keyword">const</span> byte *inString, <span class="keywordtype">size_t</span> length, <span class="keywordtype">int</span> <span class="comment">/*messageEnd*/</span>, <span class="keywordtype">bool</span> <span class="comment">/*blocking*/</span>)</div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span> {</div><div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <span class="keywordflow">while</span> (length--)</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>  byte inByte = *inString++;</div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  <span class="keywordflow">if</span> (n >= Q)</div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  sum += ::log(<span class="keywordtype">double</span>(n - tab[inByte]));</div><div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  tab[inByte] = n;</div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  n++;</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> 0;</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="keywordtype">double</span> MaurerRandomnessTest::GetTestValue()<span class="keyword"> const</span></div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span> <span class="keyword"></span>{</div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="keywordflow">if</span> (<a class="code" href="class_maurer_randomness_test.html#ae243c50c1b8f918b0719b207b699ea58">BytesNeeded</a>() > 0)</div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  <span class="keywordflow">throw</span> <a class="code" href="class_exception.html">Exception</a>(<a class="code" href="class_exception.html#a8e53909d979479380e0274807c074c0aa27d9ee7704100a88e4ae4adcc4072015">Exception::OTHER_ERROR</a>, <span class="stringliteral">"MaurerRandomnessTest: "</span> + <a class="code" href="misc_8h.html#a6cd7decd035cc4e144cd3d395e834106">IntToString</a>(<a class="code" href="class_maurer_randomness_test.html#ae243c50c1b8f918b0719b207b699ea58">BytesNeeded</a>()) + <span class="stringliteral">" more bytes of input needed"</span>);</div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span> </div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <span class="keywordtype">double</span> fTu = (sum/(n-Q))/::log(2.0); <span class="comment">// this is the test value defined by Maurer</span></div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span> </div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <span class="keywordtype">double</span> value = fTu * 0.1392; <span class="comment">// arbitrarily normalize it to</span></div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="keywordflow">return</span> value > 1.0 ? 1.0 : value; <span class="comment">// a number between 0 and 1</span></div><div class="line"><a name="l00165"></a><span class="lineno"> 165</span> }</div><div class="line"><a name="l00166"></a><span class="lineno"> 166</span> </div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span> NAMESPACE_END</div><div class="ttc" id="class_exception_html"><div class="ttname"><a href="class_exception.html">Exception</a></div><div class="ttdoc">Base class for all exceptions thrown by the library. </div><div class="ttdef"><b>Definition:</b> <a href="cryptlib_8h_source.html#l00155">cryptlib.h:155</a></div></div>
<div class="ttc" id="misc_8h_html_a44fad9d8c25e8aca3a7ee29345516f0a"><div class="ttname"><a href="misc_8h.html#a44fad9d8c25e8aca3a7ee29345516f0a">IncrementCounterByOne</a></div><div class="ttdeci">void IncrementCounterByOne(byte *inout, unsigned int size)</div><div class="ttdoc">Performs an addition with carry on a block of bytes. </div><div class="ttdef"><b>Definition:</b> <a href="misc_8h_source.html#l01108">misc.h:1108</a></div></div>
<div class="ttc" id="class_buffered_transformation_html_a97a60b54fafdb3df59e1457ef629fc5f"><div class="ttname"><a href="class_buffered_transformation.html#a97a60b54fafdb3df59e1457ef629fc5f">BufferedTransformation::ChannelPut</a></div><div class="ttdeci">size_t ChannelPut(const std::string &channel, byte inByte, bool blocking=true)</div><div class="ttdoc">Input a byte for processing on a channel. </div><div class="ttdef"><b>Definition:</b> <a href="cryptlib_8h_source.html#l02053">cryptlib.h:2053</a></div></div>
<div class="ttc" id="class_exception_html_a8e53909d979479380e0274807c074c0aa27d9ee7704100a88e4ae4adcc4072015"><div class="ttname"><a href="class_exception.html#a8e53909d979479380e0274807c074c0aa27d9ee7704100a88e4ae4adcc4072015">Exception::OTHER_ERROR</a></div><div class="ttdoc">Some other error occurred not belonging to other categories. </div><div class="ttdef"><b>Definition:</b> <a href="cryptlib_8h_source.html#l00174">cryptlib.h:174</a></div></div>
<div class="ttc" id="class_x917_r_n_g_html_a8bda7e471e98f94c3dd076a7fdbe5d1c"><div class="ttname"><a href="class_x917_r_n_g.html#a8bda7e471e98f94c3dd076a7fdbe5d1c">X917RNG::X917RNG</a></div><div class="ttdeci">X917RNG(BlockTransformation *cipher, const byte *seed, const byte *deterministicTimeVector=NULL)</div><div class="ttdoc">Construct a X917RNG. </div><div class="ttdef"><b>Definition:</b> <a href="rng_8cpp_source.html#l00061">rng.cpp:61</a></div></div>
<div class="ttc" id="class_buffered_transformation_html"><div class="ttname"><a href="class_buffered_transformation.html">BufferedTransformation</a></div><div class="ttdoc">Interface for buffered transformations. </div><div class="ttdef"><b>Definition:</b> <a href="cryptlib_8h_source.html#l01545">cryptlib.h:1545</a></div></div>
<div class="ttc" id="class_array_sink_html"><div class="ttname"><a href="class_array_sink.html">ArraySink</a></div><div class="ttdoc">Copy input to a memory buffer. </div><div class="ttdef"><b>Definition:</b> <a href="filters_8h_source.html#l01132">filters.h:1132</a></div></div>
<div class="ttc" id="class_maurer_randomness_test_html_ae2629df58de48eafc8b8d9f0b060ff98"><div class="ttname"><a href="class_maurer_randomness_test.html#ae2629df58de48eafc8b8d9f0b060ff98">MaurerRandomnessTest::Put2</a></div><div class="ttdeci">size_t Put2(const byte *inString, size_t length, int messageEnd, bool blocking)</div><div class="ttdoc">Input multiple bytes for processing. </div><div class="ttdef"><b>Definition:</b> <a href="rng_8cpp_source.html#l00143">rng.cpp:143</a></div></div>
<div class="ttc" id="cryptlib_8h_html_a9a69ab5a5e0f58279c43f4f51809c84a"><div class="ttname"><a href="cryptlib_8h.html#a9a69ab5a5e0f58279c43f4f51809c84a">DEFAULT_CHANNEL</a></div><div class="ttdeci">const std::string DEFAULT_CHANNEL</div><div class="ttdoc">Default channel for BufferedTransformation. </div><div class="ttdef"><b>Definition:</b> <a href="cryptlib_8h_source.html#l00481">cryptlib.h:481</a></div></div>
<div class="ttc" id="class_self_test_failure_html"><div class="ttname"><a href="class_self_test_failure.html">SelfTestFailure</a></div><div class="ttdoc">Exception thrown when a crypto algorithm is used after a self test fails. </div><div class="ttdef"><b>Definition:</b> <a href="fips140_8h_source.html#l00022">fips140.h:22</a></div></div>
<div class="ttc" id="pch_8h_html"><div class="ttname"><a href="pch_8h.html">pch.h</a></div><div class="ttdoc">Precompiled header file. </div></div>
<div class="ttc" id="class_block_transformation_html_a93b18a5b11cd6f61bf19624192575d1d"><div class="ttname"><a href="class_block_transformation.html#a93b18a5b11cd6f61bf19624192575d1d">BlockTransformation::ProcessBlock</a></div><div class="ttdeci">void ProcessBlock(const byte *inBlock, byte *outBlock) const</div><div class="ttdoc">Encrypt or decrypt a block. </div><div class="ttdef"><b>Definition:</b> <a href="cryptlib_8h_source.html#l00832">cryptlib.h:832</a></div></div>
<div class="ttc" id="misc_8h_html_ac8391e7d9d613a6c401787d2cdab1f51"><div class="ttname"><a href="misc_8h.html#ac8391e7d9d613a6c401787d2cdab1f51">UnsignedMin</a></div><div class="ttdeci">const T1 UnsignedMin(const T1 &a, const T2 &b)</div><div class="ttdoc">Safe comparison of values that could be neagtive and incorrectly promoted. </div><div class="ttdef"><b>Definition:</b> <a href="misc_8h_source.html#l00546">misc.h:546</a></div></div>
<div class="ttc" id="class_l_c___r_n_g_html_ab2f22bacb77dab778008f3301daa3ad6"><div class="ttname"><a href="class_l_c___r_n_g.html#ab2f22bacb77dab778008f3301daa3ad6">LC_RNG::GenerateBlock</a></div><div class="ttdeci">void GenerateBlock(byte *output, size_t size)</div><div class="ttdoc">Generate random array of bytes. </div><div class="ttdef"><b>Definition:</b> <a href="rng_8cpp_source.html#l00039">rng.cpp:39</a></div></div>
<div class="ttc" id="rng_8h_html"><div class="ttname"><a href="rng_8h.html">rng.h</a></div><div class="ttdoc">Miscellaneous classes for RNGs. </div></div>
<div class="ttc" id="class_x917_r_n_g_html_a5b84223763a1f90ddc55e87769df7bf9"><div class="ttname"><a href="class_x917_r_n_g.html#a5b84223763a1f90ddc55e87769df7bf9">X917RNG::GenerateIntoBufferedTransformation</a></div><div class="ttdeci">void GenerateIntoBufferedTransformation(BufferedTransformation &target, const std::string &channel, lword size)</div><div class="ttdoc">Generate random bytes into a BufferedTransformation. </div><div class="ttdef"><b>Definition:</b> <a href="rng_8cpp_source.html#l00095">rng.cpp:95</a></div></div>
<div class="ttc" id="namespace_name_html_aa93e40d0259a59959d270e6c82a9f1eb"><div class="ttname"><a href="namespace_name.html#aa93e40d0259a59959d270e6c82a9f1eb">Name::BlockSize</a></div><div class="ttdeci">const char * BlockSize()</div><div class="ttdoc">int, in bytes </div><div class="ttdef"><b>Definition:</b> <a href="argnames_8h_source.html#l00027">argnames.h:27</a></div></div>
<div class="ttc" id="class_maurer_randomness_test_html_ae243c50c1b8f918b0719b207b699ea58"><div class="ttname"><a href="class_maurer_randomness_test.html#ae243c50c1b8f918b0719b207b699ea58">MaurerRandomnessTest::BytesNeeded</a></div><div class="ttdeci">unsigned int BytesNeeded() const</div><div class="ttdoc">Provides the number of bytes of input is needed by the test. </div><div class="ttdef"><b>Definition:</b> <a href="rng_8h_source.html#l00094">rng.h:94</a></div></div>
<div class="ttc" id="fips140_8h_html"><div class="ttname"><a href="fips140_8h.html">fips140.h</a></div><div class="ttdoc">Classes and functions for the FIPS 140-2 validated library. </div></div>
<div class="ttc" id="misc_8h_html_a6aaae7768600b9d735a5e1b8192035f8"><div class="ttname"><a href="misc_8h.html#a6aaae7768600b9d735a5e1b8192035f8">xorbuf</a></div><div class="ttdeci">void xorbuf(byte *buf, const byte *mask, size_t count)</div><div class="ttdoc">Performs an XOR of a buffer with a mask. </div><div class="ttdef"><b>Definition:</b> <a href="misc_8cpp_source.html#l00032">misc.cpp:32</a></div></div>
<div class="ttc" id="misc_8h_html_a6cd7decd035cc4e144cd3d395e834106"><div class="ttname"><a href="misc_8h.html#a6cd7decd035cc4e144cd3d395e834106">IntToString</a></div><div class="ttdeci">std::string IntToString(T value, unsigned int base=10)</div><div class="ttdoc">Converts a value to a string. </div><div class="ttdef"><b>Definition:</b> <a href="misc_8h_source.html#l00576">misc.h:576</a></div></div>
<div class="ttc" id="namespace_crypto_p_p_html"><div class="ttname"><a href="namespace_crypto_p_p.html">CryptoPP</a></div><div class="ttdoc">Crypto++ library namespace. </div></div>
<div class="ttc" id="class_block_transformation_html"><div class="ttname"><a href="class_block_transformation.html">BlockTransformation</a></div><div class="ttdoc">Interface for the data processing part of block ciphers. </div><div class="ttdef"><b>Definition:</b> <a href="cryptlib_8h_source.html#l00808">cryptlib.h:808</a></div></div>
<div class="ttc" id="class_maurer_randomness_test_html_ab7e148c7e8d213b8f77d1336e47857c2"><div class="ttname"><a href="class_maurer_randomness_test.html#ab7e148c7e8d213b8f77d1336e47857c2">MaurerRandomnessTest::MaurerRandomnessTest</a></div><div class="ttdeci">MaurerRandomnessTest()</div><div class="ttdoc">Construct a MaurerRandomnessTest. </div><div class="ttdef"><b>Definition:</b> <a href="rng_8cpp_source.html#l00136">rng.cpp:136</a></div></div>
<div class="ttc" id="class_sec_block_html_af5999bffe3193e62719cc0792b0282a7"><div class="ttname"><a href="class_sec_block.html#af5999bffe3193e62719cc0792b0282a7">SecBlock::size</a></div><div class="ttdeci">size_type size() const</div><div class="ttdoc">Provides the count of elements in the SecBlock. </div><div class="ttdef"><b>Definition:</b> <a href="secblock_8h_source.html#l00561">secblock.h:561</a></div></div>
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