<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> <meta http-equiv="X-UA-Compatible" content="IE=9"/> <meta name="generator" content="Doxygen 1.8.14"/> <meta name="viewport" content="width=device-width, initial-scale=1"/> <title>Crypto++: arc4.h Source File</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript" src="dynsections.js"></script> <link href="doxygen.css" rel="stylesheet" type="text/css" /> </head> <body> <div id="top"><!-- do not remove this div, it is closed by doxygen! --> <div id="titlearea"> <table cellspacing="0" cellpadding="0"> <tbody> <tr style="height: 56px;"> <td id="projectalign" style="padding-left: 0.5em;"> <div id="projectname">Crypto++  <span id="projectnumber">7.0</span> </div> <div id="projectbrief">Free C++ class library of cryptographic schemes</div> </td> </tr> </tbody> </table> </div> <!-- end header part --> <!-- Generated by Doxygen 1.8.14 --> <script type="text/javascript" src="menudata.js"></script> <script type="text/javascript" src="menu.js"></script> <script type="text/javascript"> /* @license magnet:?xt=urn:btih:cf05388f2679ee054f2beb29a391d25f4e673ac3&dn=gpl-2.0.txt GPL-v2 */ $(function() { initMenu('',false,false,'search.php','Search'); }); /* @license-end */</script> <div id="main-nav"></div> </div><!-- top --> <div class="header"> <div class="headertitle"> <div class="title">arc4.h</div> </div> </div><!--header--> <div class="contents"> <a href="arc4_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">// arc4.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 arc4.h</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">/// \brief Classes for ARC4 cipher</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">/// \since Crypto++ 3.1</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"></span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="preprocessor">#ifndef CRYPTOPP_ARC4_H</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="preprocessor">#define CRYPTOPP_ARC4_H</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> </div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="preprocessor">#include "<a class="code" href="cryptlib_8h.html">cryptlib.h</a>"</span></div><div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="preprocessor">#include "<a class="code" href="strciphr_8h.html">strciphr.h</a>"</span></div><div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="preprocessor">#include "<a class="code" href="secblock_8h.html">secblock.h</a>"</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="preprocessor">#include "<a class="code" href="smartptr_8h.html">smartptr.h</a>"</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> </div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> NAMESPACE_BEGIN(<a class="code" href="namespace_crypto_p_p.html">CryptoPP</a>)</div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> </div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="keyword">namespace </span>Weak1 {</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">/// \brief ARC4 base class</span></div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment">/// \details Implementations and overrides in \p Base apply to both \p ENCRYPTION and \p DECRYPTION directions</span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment">/// \since Crypto++ 3.1</span></div><div class="line"><a name="l00022"></a><span class="lineno"><a class="line" href="class_weak_1_1_a_r_c4___base.html"> 22</a></span> <span class="comment"></span><span class="keyword">class </span>CRYPTOPP_NO_VTABLE <a class="code" href="class_weak_1_1_a_r_c4___base.html">ARC4_Base</a> : <span class="keyword">public</span> <a class="code" href="class_variable_key_length.html">VariableKeyLength</a><16, 1, 256>, <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_symmetric_cipher.html">SymmetricCipher</a>, <span class="keyword">public</span> <a class="code" href="struct_symmetric_cipher_documentation.html">SymmetricCipherDocumentation</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>:</div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span>  ~<a class="code" href="class_weak_1_1_a_r_c4___base.html">ARC4_Base</a>();</div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> </div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span>  CRYPTOPP_STATIC_CONSTEXPR <span class="keyword">const</span> <span class="keywordtype">char</span>* StaticAlgorithmName() {<span class="keywordflow">return</span> <span class="stringliteral">"ARC4"</span>;}</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="keywordtype">void</span> GenerateBlock(byte *output, <span class="keywordtype">size_t</span> size);</div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  <span class="keywordtype">void</span> DiscardBytes(<span class="keywordtype">size_t</span> n);</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>  <span class="keywordtype">void</span> ProcessData(byte *outString, <span class="keyword">const</span> byte *inString, <span class="keywordtype">size_t</span> length);</div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> </div><div class="line"><a name="l00034"></a><span class="lineno"><a class="line" href="class_weak_1_1_a_r_c4___base.html#a398fc19cea2a9a9446bb43743ed019f7"> 34</a></span>  <span class="keywordtype">bool</span> <a class="code" href="class_weak_1_1_a_r_c4___base.html#a398fc19cea2a9a9446bb43743ed019f7">IsRandomAccess</a>()<span class="keyword"> const </span>{<span class="keywordflow">return</span> <span class="keyword">false</span>;}</div><div class="line"><a name="l00035"></a><span class="lineno"><a class="line" href="class_weak_1_1_a_r_c4___base.html#a44b0a2bf3ee9bdf10fb1c517dcc3f09c"> 35</a></span>  <span class="keywordtype">bool</span> <a class="code" href="class_weak_1_1_a_r_c4___base.html#a44b0a2bf3ee9bdf10fb1c517dcc3f09c">IsSelfInverting</a>()<span class="keyword"> const </span>{<span class="keywordflow">return</span> <span class="keyword">true</span>;}</div><div class="line"><a name="l00036"></a><span class="lineno"><a class="line" href="class_weak_1_1_a_r_c4___base.html#a516513034fcdcc17f33d7ad029b9b81e"> 36</a></span>  <span class="keywordtype">bool</span> <a class="code" href="class_weak_1_1_a_r_c4___base.html#a516513034fcdcc17f33d7ad029b9b81e">IsForwardTransformation</a>()<span class="keyword"> const </span>{<span class="keywordflow">return</span> <span class="keyword">true</span>;}</div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> </div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  <span class="keyword">typedef</span> <a class="code" href="class_symmetric_cipher_final.html">SymmetricCipherFinal<ARC4_Base></a> Encryption;</div><div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <span class="keyword">typedef</span> <a class="code" href="class_symmetric_cipher_final.html">SymmetricCipherFinal<ARC4_Base></a> Decryption;</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="keyword">protected</span>:</div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  <span class="keywordtype">void</span> UncheckedSetKey(<span class="keyword">const</span> byte *key, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> length, <span class="keyword">const</span> <a class="code" href="class_name_value_pairs.html">NameValuePairs</a> &params);</div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  <span class="keyword">virtual</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> GetDefaultDiscardBytes()<span class="keyword"> const </span>{<span class="keywordflow">return</span> 0;}</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> </div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <a class="code" href="class_fixed_size_sec_block.html">FixedSizeSecBlock<byte, 256></a> m_state;</div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  byte m_x, m_y;</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="comment"></span></div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment">/// \brief Alleged RC4</span></div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment">/// \sa <a href="http://www.cryptopp.com/wiki/RC4">Alleged RC4</a></span></div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment">/// \since Crypto++ 3.1</span></div><div class="line"><a name="l00052"></a><span class="lineno"><a class="line" href="class_weak_1_1_a_r_c4.html"> 52</a></span> <span class="comment"></span>DOCUMENTED_TYPEDEF(<a class="code" href="class_symmetric_cipher_final.html">SymmetricCipherFinal<ARC4_Base></a>, <a class="code" href="class_weak_1_1_a_r_c4.html">ARC4</a>)</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span> </div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment">/// \brief MARC4 base class</span></div><div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="comment"></span><span class="comment">/// \details Implementations and overrides in \p Base apply to both \p ENCRYPTION and \p DECRYPTION directions</span></div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment"></span><span class="comment">/// \details MARC4 discards the first 256 bytes of keystream, which may be weaker than the rest</span></div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"></span><span class="comment">/// \since Crypto++ 3.1</span></div><div class="line"><a name="l00058"></a><span class="lineno"><a class="line" href="class_weak_1_1_m_a_r_c4___base.html"> 58</a></span> <span class="comment"></span>class CRYPTOPP_NO_VTABLE <a class="code" href="class_weak_1_1_m_a_r_c4___base.html">MARC4_Base</a> : public <a class="code" href="class_weak_1_1_a_r_c4___base.html">ARC4_Base</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> <span class="keyword">public</span>:</div><div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  CRYPTOPP_STATIC_CONSTEXPR <span class="keyword">const</span> <span class="keywordtype">char</span>* StaticAlgorithmName() {<span class="keywordflow">return</span> <span class="stringliteral">"MARC4"</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="keyword">typedef</span> <a class="code" href="class_symmetric_cipher_final.html">SymmetricCipherFinal<MARC4_Base></a> <a class="code" href="class_symmetric_cipher_final.html">Encryption</a>;</div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keyword">typedef</span> <a class="code" href="class_symmetric_cipher_final.html">SymmetricCipherFinal<MARC4_Base></a> <a class="code" href="class_symmetric_cipher_final.html">Decryption</a>;</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span> </div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="keyword">protected</span>:</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> GetDefaultDiscardBytes()<span class="keyword"> const </span>{<span class="keywordflow">return</span> 256;}</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"></span></div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="comment">/// \brief Modified Alleged RC4</span></div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="comment">/// \sa <a href="http://www.cryptopp.com/wiki/RC4">Alleged RC4</a></span></div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="comment">/// \since Crypto++ 3.1</span></div><div class="line"><a name="l00073"></a><span class="lineno"><a class="line" href="class_weak_1_1_m_a_r_c4.html"> 73</a></span> <span class="comment"></span>DOCUMENTED_TYPEDEF(<a class="code" href="class_symmetric_cipher_final.html">SymmetricCipherFinal<MARC4_Base></a>, <a class="code" href="class_weak_1_1_m_a_r_c4.html">MARC4</a>)</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span> </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="preprocessor">#if CRYPTOPP_ENABLE_NAMESPACE_WEAK >= 1</span></div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="keyword">namespace </span><a class="code" href="namespace_weak.html">Weak</a> {<span class="keyword">using namespace </span>Weak1;} <span class="comment">// import Weak1 into CryptoPP::Weak</span></div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="keyword">using namespace </span>Weak1; <span class="comment">// import Weak1 into CryptoPP with warning</span></div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="preprocessor">#ifdef __GNUC__</span></div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="preprocessor">#warning "You may be using a weak algorithm that has been retained for backwards compatibility. Please '#define CRYPTOPP_ENABLE_NAMESPACE_WEAK 1' before including this .h file and prepend the class name with 'Weak::' to remove this warning."</span></div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="preprocessor">#else</span></div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="preprocessor">#pragma message("You may be using a weak algorithm that has been retained for backwards compatibility. Please '#define CRYPTOPP_ENABLE_NAMESPACE_WEAK 1' before including this .h file and prepend the class name with 'Weak::' to remove this warning.")</span></div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="preprocessor">#endif</span></div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="preprocessor">#endif</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> NAMESPACE_END</div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span> </div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="preprocessor">#endif</span></div><div class="ttc" id="class_weak_1_1_m_a_r_c4___base_html"><div class="ttname"><a href="class_weak_1_1_m_a_r_c4___base.html">Weak::MARC4_Base</a></div><div class="ttdoc">MARC4 base class. </div><div class="ttdef"><b>Definition:</b> <a href="arc4_8h_source.html#l00058">arc4.h:58</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="secblock_8h_html"><div class="ttname"><a href="secblock_8h.html">secblock.h</a></div><div class="ttdoc">Classes and functions for secure memory allocations. </div></div> <div class="ttc" id="class_weak_1_1_a_r_c4___base_html_a44b0a2bf3ee9bdf10fb1c517dcc3f09c"><div class="ttname"><a href="class_weak_1_1_a_r_c4___base.html#a44b0a2bf3ee9bdf10fb1c517dcc3f09c">Weak::ARC4_Base::IsSelfInverting</a></div><div class="ttdeci">bool IsSelfInverting() const</div><div class="ttdoc">Determines whether the cipher is self-inverting. </div><div class="ttdef"><b>Definition:</b> <a href="arc4_8h_source.html#l00035">arc4.h:35</a></div></div> <div class="ttc" id="class_weak_1_1_a_r_c4_html"><div class="ttname"><a href="class_weak_1_1_a_r_c4.html">Weak::ARC4</a></div><div class="ttdoc">Alleged RC4. </div><div class="ttdef"><b>Definition:</b> <a href="arc4_8h_source.html#l00052">arc4.h:52</a></div></div> <div class="ttc" id="class_symmetric_cipher_html"><div class="ttname"><a href="class_symmetric_cipher.html">SymmetricCipher</a></div><div class="ttdoc">Interface for one direction (encryption or decryption) of a stream cipher or cipher mode...</div><div class="ttdef"><b>Definition:</b> <a href="cryptlib_8h_source.html#l01237">cryptlib.h:1237</a></div></div> <div class="ttc" id="class_weak_1_1_a_r_c4___base_html"><div class="ttname"><a href="class_weak_1_1_a_r_c4___base.html">Weak::ARC4_Base</a></div><div class="ttdoc">ARC4 base class. </div><div class="ttdef"><b>Definition:</b> <a href="arc4_8h_source.html#l00022">arc4.h:22</a></div></div> <div class="ttc" id="class_fixed_size_sec_block_html"><div class="ttname"><a href="class_fixed_size_sec_block.html">FixedSizeSecBlock< byte, 256 ></a></div></div> <div class="ttc" id="class_variable_key_length_html"><div class="ttname"><a href="class_variable_key_length.html">VariableKeyLength</a></div><div class="ttdoc">Inherited by keyed algorithms with variable key length. </div><div class="ttdef"><b>Definition:</b> <a href="seckey_8h_source.html#l00188">seckey.h:188</a></div></div> <div class="ttc" id="class_weak_1_1_m_a_r_c4_html"><div class="ttname"><a href="class_weak_1_1_m_a_r_c4.html">Weak::MARC4</a></div><div class="ttdoc">Modified Alleged RC4. </div><div class="ttdef"><b>Definition:</b> <a href="arc4_8h_source.html#l00073">arc4.h:73</a></div></div> <div class="ttc" id="strciphr_8h_html"><div class="ttname"><a href="strciphr_8h.html">strciphr.h</a></div><div class="ttdoc">Classes for implementing stream ciphers. </div></div> <div class="ttc" id="struct_symmetric_cipher_documentation_html"><div class="ttname"><a href="struct_symmetric_cipher_documentation.html">SymmetricCipherDocumentation</a></div><div class="ttdoc">Provides Encryption and Decryption typedefs used by derived classes to implement a symmetric cipher...</div><div class="ttdef"><b>Definition:</b> <a href="seckey_8h_source.html#l00435">seckey.h:435</a></div></div> <div class="ttc" id="class_weak_1_1_a_r_c4___base_html_a516513034fcdcc17f33d7ad029b9b81e"><div class="ttname"><a href="class_weak_1_1_a_r_c4___base.html#a516513034fcdcc17f33d7ad029b9b81e">Weak::ARC4_Base::IsForwardTransformation</a></div><div class="ttdeci">bool IsForwardTransformation() const</div><div class="ttdoc">Determines if the cipher is being operated in its forward direction. </div><div class="ttdef"><b>Definition:</b> <a href="arc4_8h_source.html#l00036">arc4.h:36</a></div></div> <div class="ttc" id="class_weak_1_1_a_r_c4___base_html_a398fc19cea2a9a9446bb43743ed019f7"><div class="ttname"><a href="class_weak_1_1_a_r_c4___base.html#a398fc19cea2a9a9446bb43743ed019f7">Weak::ARC4_Base::IsRandomAccess</a></div><div class="ttdeci">bool IsRandomAccess() const</div><div class="ttdoc">Determines whether the cipher supports random access. </div><div class="ttdef"><b>Definition:</b> <a href="arc4_8h_source.html#l00034">arc4.h:34</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_symmetric_cipher_final_html"><div class="ttname"><a href="class_symmetric_cipher_final.html">SymmetricCipherFinal< ARC4_Base ></a></div></div> <div class="ttc" id="namespace_weak_html"><div class="ttname"><a href="namespace_weak.html">Weak</a></div><div class="ttdoc">Namespace containing weak and wounded algorithms. </div><div class="ttdef"><b>Definition:</b> <a href="arc4_8cpp_source.html#l00014">arc4.cpp:14</a></div></div> <div class="ttc" id="class_name_value_pairs_html"><div class="ttname"><a href="class_name_value_pairs.html">NameValuePairs</a></div><div class="ttdoc">Interface for retrieving values given their names. </div><div class="ttdef"><b>Definition:</b> <a href="cryptlib_8h_source.html#l00290">cryptlib.h:290</a></div></div> </div><!-- fragment --></div><!-- contents --> <!-- start footer part --> <hr class="footer"/><address class="footer"><small> Generated on Sun Sep 16 2018 07:57:45 for Crypto++ by  <a href="http://www.doxygen.org/index.html"> <img class="footer" src="doxygen.png" alt="doxygen"/> </a> 1.8.14 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