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 <span id="projectnumber">7.0</span>
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<a href="rng_8h.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">// rng.h - 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> <span class="comment"></span></div><div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">/// \file rng.h</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">/// \brief Miscellaneous classes for RNGs</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">/// \details This file contains miscellaneous classes for RNGs, including LC_RNG(),</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">/// X917RNG() and MaurerRandomnessTest()</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">/// \sa osrng.h, randpool.h</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="preprocessor">#ifndef CRYPTOPP_RNG_H</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#define CRYPTOPP_RNG_H</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> </div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include "<a class="code" href="cryptlib_8h.html">cryptlib.h</a>"</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include "<a class="code" href="filters_8h.html">filters.h</a>"</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="preprocessor">#include "<a class="code" href="smartptr_8h.html">smartptr.h</a>"</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> NAMESPACE_BEGIN(<a class="code" href="namespace_crypto_p_p.html">CryptoPP</a>)</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">/// \brief Linear Congruential Generator (LCG)</span></div><div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"></span><span class="comment">/// \details Originally propsed by William S. England.</span></div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"></span><span class="comment">/// \warning LC_RNG is suitable for simulations, where uniformaly distrubuted numbers are</span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"></span><span class="comment">/// required quickly. It should not be used for cryptographic purposes.</span></div><div class="line"><a name="l00022"></a><span class="lineno"><a class="line" href="class_l_c___r_n_g.html"> 22</a></span> <span class="comment"></span>class <a class="code" href="class_l_c___r_n_g.html">LC_RNG</a> : public <a class="code" href="class_random_number_generator.html">RandomNumberGenerator</a></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> {</div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="keyword">public</span>:<span class="comment"></span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"> /// \brief Construct a Linear Congruential Generator (LCG)</span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> /// \param init_seed the initial value for the generator</span></div><div class="line"><a name="l00027"></a><span class="lineno"><a class="line" href="class_l_c___r_n_g.html#a6d7df7fcc2da384b3dd5c9b8ac91cfef"> 27</a></span> <span class="comment"></span> <a class="code" href="class_l_c___r_n_g.html#a6d7df7fcc2da384b3dd5c9b8ac91cfef">LC_RNG</a>(word32 init_seed)</div><div class="line"><a name="l00028"></a><span class="lineno"> 28</span>  : seed(init_seed) {}</div><div class="line"><a name="l00029"></a><span class="lineno"> 29</span> </div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  <span class="keywordtype">void</span> GenerateBlock(byte *output, <span class="keywordtype">size_t</span> size);</div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> </div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  word32 GetSeed() {<span class="keywordflow">return</span> seed;}</div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> </div><div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="keyword">private</span>:</div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  word32 seed;</div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> </div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span>  <span class="keyword">static</span> <span class="keyword">const</span> word32 m;</div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <span class="keyword">static</span> <span class="keyword">const</span> word32 q;</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <span class="keyword">static</span> <span class="keyword">const</span> word16 a;</div><div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <span class="keyword">static</span> <span class="keyword">const</span> word16 r;</div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span> };</div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment"></span></div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment">/// \brief ANSI X9.17 RNG</span></div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment">/// \details X917RNG is from ANSI X9.17 Appendix C, and it uses a 64-bit block cipher, like TripleDES.</span></div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment">/// If you use a 128-bit block cipher, like AES, then you are effectively using an ANSI X9.31 generator.</span></div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment">/// \sa AutoSeededX917RNG, DefaultAutoSeededRNG</span></div><div class="line"><a name="l00047"></a><span class="lineno"><a class="line" href="class_x917_r_n_g.html"> 47</a></span> <span class="comment"></span><span class="keyword">class </span>CRYPTOPP_DLL <a class="code" href="class_x917_r_n_g.html">X917RNG</a> : <span class="keyword">public</span> <a class="code" href="class_random_number_generator.html">RandomNumberGenerator</a>, <span class="keyword">public</span> <a class="code" href="class_not_copyable.html">NotCopyable</a></div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> {</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="keyword">public</span>:<span class="comment"></span></div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment"> /// \brief Construct a X917RNG</span></div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment"> /// \param cipher the block cipher to use for the generator</span></div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment"> /// \param seed a byte buffer to use as a seed</span></div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment"> /// \param deterministicTimeVector additional entropy</span></div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment"> /// \details <tt>cipher</tt> will be deleted by the destructor. <tt>seed</tt> must be at least</span></div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="comment"> /// BlockSize() in length. <tt>deterministicTimeVector = 0</tt> means obtain time vector</span></div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment"> /// from the system.</span></div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"> /// \details When constructing a X917RNG, the generator must be keyed or an access</span></div><div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment"> /// violation will occur because the time vector is encrypted using the block cipher.</span></div><div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment"> /// To key the generator during constructions, perform the following:</span></div><div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment"> /// <pre></span></div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="comment"> /// SecByteBlock key(AES::DEFAULT_KEYLENGTH), seed(AES::BLOCKSIZE);</span></div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment"> /// OS_GenerateRandomBlock(false, key, key.size());</span></div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment"> /// OS_GenerateRandomBlock(false, seed, seed.size());</span></div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="comment"> /// X917RNG prng(new AES::Encryption(key, AES::DEFAULT_KEYLENGTH), seed, NULLPTR);</pre></span></div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="comment"> /// \sa AutoSeededX917RNG</span></div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="comment"></span> <a class="code" href="class_x917_r_n_g.html">X917RNG</a>(<a class="code" href="class_block_transformation.html">BlockTransformation</a> *cipher, <span class="keyword">const</span> byte *seed, <span class="keyword">const</span> byte *deterministicTimeVector = NULLPTR);</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span> </div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="keywordtype">void</span> <a class="code" href="class_random_number_generator.html#a5cc474006e2c7383ec20cc4d0c2abbaf">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="l00069"></a><span class="lineno"> 69</span> </div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="keyword">private</span>:</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  <a class="code" href="classmember__ptr.html">member_ptr<BlockTransformation></a> m_cipher;</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> m_size; <span class="comment">// S, blocksize of cipher</span></div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  <a class="code" href="class_sec_byte_block.html">SecByteBlock</a> m_datetime; <span class="comment">// DT, buffer for enciphered timestamp</span></div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <a class="code" href="class_sec_byte_block.html">SecByteBlock</a> m_randseed, m_lastBlock, m_deterministicTimeVector;</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> <span class="comment"></span></div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="comment">/// \brief Maurer's Universal Statistical Test for Random Bit Generators</span></div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="comment">/// \details This class implements Maurer's Universal Statistical Test for</span></div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="comment">/// Random Bit Generators. It is intended for measuring the randomness of</span></div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="comment">/// *PHYSICAL* RNGs.</span></div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="comment">/// \details For more details see Maurer's paper in Journal of Cryptology, 1992.</span></div><div class="line"><a name="l00082"></a><span class="lineno"><a class="line" href="class_maurer_randomness_test.html"> 82</a></span> <span class="comment"></span><span class="keyword">class </span><a class="code" href="class_maurer_randomness_test.html">MaurerRandomnessTest</a> : <span class="keyword">public</span> <a class="code" href="class_bufferless.html">Bufferless</a><Sink></div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span> {</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="keyword">public</span>:<span class="comment"></span></div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="comment"> /// \brief Construct a MaurerRandomnessTest</span></div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="comment"></span> <a class="code" href="class_maurer_randomness_test.html#ab7e148c7e8d213b8f77d1336e47857c2">MaurerRandomnessTest</a>();</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span> </div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keywordtype">size_t</span> <a class="code" href="class_maurer_randomness_test.html#ae2629df58de48eafc8b8d9f0b060ff98">Put2</a>(<span class="keyword">const</span> byte *inString, <span class="keywordtype">size_t</span> length, <span class="keywordtype">int</span> messageEnd, <span class="keywordtype">bool</span> blocking);</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"> /// \brief Provides the number of bytes of input is needed by the test</span></div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="comment"> /// \returns how many more bytes of input is needed by the test</span></div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="comment"></span> <span class="comment">// BytesNeeded() returns how many more bytes of input is needed by the test</span></div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="comment">// GetTestValue() should not be called before BytesNeeded()==0</span></div><div class="line"><a name="l00094"></a><span class="lineno"><a class="line" href="class_maurer_randomness_test.html#ae243c50c1b8f918b0719b207b699ea58"> 94</a></span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="class_maurer_randomness_test.html#ae243c50c1b8f918b0719b207b699ea58">BytesNeeded</a>()<span class="keyword"> const </span>{<span class="keywordflow">return</span> n >= (Q+K) ? 0 : Q+K-n;}</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span> </div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="comment">// returns a number between 0.0 and 1.0, describing the quality of the</span></div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="comment">// random numbers entered</span></div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="keywordtype">double</span> GetTestValue() <span class="keyword">const</span>;</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span> </div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="keyword">private</span>:</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keyword">enum</span> {L=8, V=256, Q=2000, K=2000};</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="keywordtype">double</span> sum;</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> n;</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> tab[V];</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</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> NAMESPACE_END</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span> </div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="preprocessor">#endif</span></div><div class="ttc" id="class_x917_r_n_g_html"><div class="ttname"><a href="class_x917_r_n_g.html">X917RNG</a></div><div class="ttdoc">ANSI X9.17 RNG. </div><div class="ttdef"><b>Definition:</b> <a href="rng_8h_source.html#l00047">rng.h:47</a></div></div>
<div class="ttc" id="class_l_c___r_n_g_html"><div class="ttname"><a href="class_l_c___r_n_g.html">LC_RNG</a></div><div class="ttdoc">Linear Congruential Generator (LCG) </div><div class="ttdef"><b>Definition:</b> <a href="rng_8h_source.html#l00022">rng.h:22</a></div></div>
<div class="ttc" id="cryptlib_8h_html"><div class="ttname"><a href="cryptlib_8h.html">cryptlib.h</a></div><div class="ttdoc">Abstract base classes that provide a uniform interface to this library. </div></div>
<div class="ttc" id="smartptr_8h_html"><div class="ttname"><a href="smartptr_8h.html">smartptr.h</a></div><div class="ttdoc">Classes for automatic resource management. </div></div>
<div class="ttc" id="class_random_number_generator_html"><div class="ttname"><a href="class_random_number_generator.html">RandomNumberGenerator</a></div><div class="ttdoc">Interface for random number generators. </div><div class="ttdef"><b>Definition:</b> <a href="cryptlib_8h_source.html#l01330">cryptlib.h:1330</a></div></div>
<div class="ttc" id="class_sec_byte_block_html"><div class="ttname"><a href="class_sec_byte_block.html">SecByteBlock</a></div><div class="ttdoc">SecBlock<byte> typedef. </div><div class="ttdef"><b>Definition:</b> <a href="secblock_8h_source.html#l00822">secblock.h:822</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="classmember__ptr_html"><div class="ttname"><a href="classmember__ptr.html">member_ptr< BlockTransformation ></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="class_maurer_randomness_test_html"><div class="ttname"><a href="class_maurer_randomness_test.html">MaurerRandomnessTest</a></div><div class="ttdoc">Maurer&#39;s Universal Statistical Test for Random Bit Generators. </div><div class="ttdef"><b>Definition:</b> <a href="rng_8h_source.html#l00082">rng.h:82</a></div></div>
<div class="ttc" id="class_l_c___r_n_g_html_a6d7df7fcc2da384b3dd5c9b8ac91cfef"><div class="ttname"><a href="class_l_c___r_n_g.html#a6d7df7fcc2da384b3dd5c9b8ac91cfef">LC_RNG::LC_RNG</a></div><div class="ttdeci">LC_RNG(word32 init_seed)</div><div class="ttdoc">Construct a Linear Congruential Generator (LCG) </div><div class="ttdef"><b>Definition:</b> <a href="rng_8h_source.html#l00027">rng.h:27</a></div></div>
<div class="ttc" id="filters_8h_html"><div class="ttname"><a href="filters_8h.html">filters.h</a></div><div class="ttdoc">Implementation of BufferedTransformation&#39;s attachment interface. </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="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_not_copyable_html"><div class="ttname"><a href="class_not_copyable.html">NotCopyable</a></div><div class="ttdoc">Ensures an object is not copyable. </div><div class="ttdef"><b>Definition:</b> <a href="misc_8h_source.html#l00228">misc.h:228</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_random_number_generator_html_a5cc474006e2c7383ec20cc4d0c2abbaf"><div class="ttname"><a href="class_random_number_generator.html#a5cc474006e2c7383ec20cc4d0c2abbaf">RandomNumberGenerator::GenerateIntoBufferedTransformation</a></div><div class="ttdeci">virtual void GenerateIntoBufferedTransformation(BufferedTransformation &target, const std::string &channel, lword length)</div><div class="ttdoc">Generate random bytes into a BufferedTransformation. </div><div class="ttdef"><b>Definition:</b> <a href="cryptlib_8cpp_source.html#l00330">cryptlib.cpp:330</a></div></div>
<div class="ttc" id="class_bufferless_html"><div class="ttname"><a href="class_bufferless.html">Bufferless</a></div><div class="ttdoc">Base class for bufferless filters. </div><div class="ttdef"><b>Definition:</b> <a href="simple_8h_source.html#l00098">simple.h:98</a></div></div>
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