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<a href="siphash_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">// siphash.h - written and placed in public domain by Jeffrey Walton.</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 siphash.h</span></div><div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">/// \brief Classes for SipHash message authentication code</span></div><div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">/// \details SipHash computes a 64-bit or 128-bit message authentication code from a variable-length</span></div><div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">/// message and 128-bit secret key. It was designed to be efficient even for short inputs, with</span></div><div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">/// performance comparable to non-cryptographic hash functions.</span></div><div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">/// \details To create a SipHash-2-4 object with a 64-bit MAC use code similar to the following.</span></div><div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">/// <pre> SecByteBlock key(16);</span></div><div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment">/// prng.GenerateBlock(key, key.size());</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">/// SipHash<2,4,false> hash(key, key.size());</span></div><div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment">/// hash.Update(...);</span></div><div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment">/// hash.Final(...);</pre></span></div><div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment">/// \details To create a SipHash-2-4 object with a 128-bit MAC use code similar to the following.</span></div><div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment">/// <pre> SecByteBlock key(16);</span></div><div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment">/// prng.GenerateBlock(key, key.size());</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">/// SipHash<2,4,true> hash(key, key.size());</span></div><div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment">/// hash.Update(...);</span></div><div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment">/// hash.Final(...);</pre></span></div><div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment">/// \sa Jean-Philippe Aumasson and Daniel J. Bernstein <A HREF="http://131002.net/siphash/siphash.pdf">SipHash:</span></div><div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment">/// a fast short-input PRF</A></span></div><div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment">/// \since Crypto++ 6.0</span></div><div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"></span></div><div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#ifndef CRYPTOPP_SIPHASH_H</span></div><div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor">#define CRYPTOPP_SIPHASH_H</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="preprocessor">#include "<a class="code" href="cryptlib_8h.html">cryptlib.h</a>"</span></div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#include "<a class="code" href="secblock_8h.html">secblock.h</a>"</span></div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#include "<a class="code" href="misc_8h.html">misc.h</a>"</span></div><div class="line"><a name="l00032"></a><span class="lineno"> 32</span> </div><div class="line"><a name="l00033"></a><span class="lineno"> 33</span> NAMESPACE_BEGIN(<a class="code" href="namespace_crypto_p_p.html">CryptoPP</a>)</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="comment">/// \brief SipHash message authentication code information</span></div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment"></span><span class="comment">/// \tparam T_128bit flag indicating 128-bit (true) versus 64-bit (false) digest size</span></div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment"></span><span class="keyword">template</span> <<span class="keywordtype">bool</span> T_128bit></div><div class="line"><a name="l00038"></a><span class="lineno"><a class="line" href="class_sip_hash___info.html"> 38</a></span> <span class="keyword">class </span><a class="code" href="class_sip_hash___info.html">SipHash_Info</a> : <span class="keyword">public</span> <a class="code" href="class_fixed_key_length.html">FixedKeyLength</a><16></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> <span class="keyword">public</span>:</div><div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  CRYPTOPP_STATIC_CONSTEXPR <span class="keyword">const</span> <span class="keywordtype">char</span>* StaticAlgorithmName() {<span class="keywordflow">return</span> <span class="stringliteral">"SipHash"</span>;}</div><div class="line"><a name="l00042"></a><span class="lineno"> 42</span>  CRYPTOPP_CONSTANT(DIGESTSIZE = (T_128bit ? 16 : 8))</div><div class="line"><a name="l00043"></a><span class="lineno"> 43</span> };</div><div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment"></span></div><div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment">/// \brief SipHash message authentication code base class</span></div><div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment">/// \tparam C the number of compression rounds</span></div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment">/// \tparam D the number of finalization rounds</span></div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment">/// \tparam T_128bit flag indicating 128-bit (true) versus 64-bit (false) digest size</span></div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment"></span><span class="keyword">template</span> <<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> C, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> D, <span class="keywordtype">bool</span> T_128bit></div><div class="line"><a name="l00050"></a><span class="lineno"><a class="line" href="class_sip_hash___base.html"> 50</a></span> <span class="keyword">class </span><a class="code" href="class_sip_hash___base.html">SipHash_Base</a> : <span class="keyword">public</span> <a class="code" href="class_message_authentication_code.html">MessageAuthenticationCode</a>, <span class="keyword">public</span> <a class="code" href="class_sip_hash___info.html">SipHash_Info</a><T_128bit></div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span> {</div><div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="keyword">public</span>:</div><div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keyword">static</span> std::string StaticAlgorithmName() {</div><div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keywordflow">return</span> std::string(<a class="code" href="class_sip_hash___info.html">SipHash_Info<T_128bit>::StaticAlgorithmName</a>())+<span class="stringliteral">"-"</span>+<a class="code" href="misc_8h.html#a6cd7decd035cc4e144cd3d395e834106">IntToString</a>(C)+<span class="stringliteral">"-"</span>+<a class="code" href="misc_8h.html#a6cd7decd035cc4e144cd3d395e834106">IntToString</a>(D);</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="keyword">virtual</span> ~<a class="code" href="class_sip_hash___base.html">SipHash_Base</a>() {}</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>  <a class="code" href="class_sip_hash___base.html">SipHash_Base</a>() : m_idx(0) {}</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_sip_hash___base.html#ac97ba8f34aed91ab3eb1a66dad3c0471"> 61</a></span>  <span class="keyword">virtual</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="class_sip_hash___base.html#ac97ba8f34aed91ab3eb1a66dad3c0471">DigestSize</a>()<span class="keyword"> const</span></div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="keyword"> </span>{<span class="keywordflow">return</span> <a class="code" href="class_sip_hash___info.html">SipHash_Info<T_128bit>::DIGESTSIZE</a>;}</div><div class="line"><a name="l00063"></a><span class="lineno"><a class="line" href="class_sip_hash___base.html#a7159b984bca8bc816b0ff0377ebaa319"> 63</a></span>  <span class="keyword">virtual</span> <span class="keywordtype">size_t</span> <a class="code" href="class_sip_hash___base.html#a7159b984bca8bc816b0ff0377ebaa319">MinKeyLength</a>()<span class="keyword"> const</span></div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="keyword"> </span>{<span class="keywordflow">return</span> <a class="code" href="class_sip_hash___info.html">SipHash_Info<T_128bit>::MIN_KEYLENGTH</a>;}</div><div class="line"><a name="l00065"></a><span class="lineno"><a class="line" href="class_sip_hash___base.html#add4d714a7b48484b93133fc29f4b99d9"> 65</a></span>  <span class="keyword">virtual</span> <span class="keywordtype">size_t</span> <a class="code" href="class_sip_hash___base.html#add4d714a7b48484b93133fc29f4b99d9">MaxKeyLength</a>()<span class="keyword"> const</span></div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="keyword"> </span>{<span class="keywordflow">return</span> <a class="code" href="class_sip_hash___info.html">SipHash_Info<T_128bit>::MAX_KEYLENGTH</a>;}</div><div class="line"><a name="l00067"></a><span class="lineno"><a class="line" href="class_sip_hash___base.html#ad60daf12e6e57c05d5d0f91253715b55"> 67</a></span>  <span class="keyword">virtual</span> <span class="keywordtype">size_t</span> <a class="code" href="class_sip_hash___base.html#ad60daf12e6e57c05d5d0f91253715b55">DefaultKeyLength</a>()<span class="keyword"> const</span></div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="keyword"> </span>{<span class="keywordflow">return</span> <a class="code" href="class_sip_hash___info.html">SipHash_Info<T_128bit>::DEFAULT_KEYLENGTH</a>;}</div><div class="line"><a name="l00069"></a><span class="lineno"><a class="line" href="class_sip_hash___base.html#af84df4a4ae080dff7f1e530e1eaddf68"> 69</a></span>  <span class="keyword">virtual</span> <span class="keywordtype">size_t</span> <a class="code" href="class_sip_hash___base.html#af84df4a4ae080dff7f1e530e1eaddf68">GetValidKeyLength</a>(<span class="keywordtype">size_t</span> keylength)<span class="keyword"> const</span></div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="keyword"> </span>{CRYPTOPP_UNUSED(keylength); <span class="keywordflow">return</span> <a class="code" href="class_sip_hash___info.html">SipHash_Info<T_128bit>::DEFAULT_KEYLENGTH</a>;}</div><div class="line"><a name="l00071"></a><span class="lineno"><a class="line" href="class_sip_hash___base.html#a1378d073c146b84c910f7df406e2726a"> 71</a></span>  <span class="keyword">virtual</span> <a class="code" href="class_simple_keying_interface.html#a88201c180fbfaa9fef2715252546ad6e">IV_Requirement</a> <a class="code" href="class_sip_hash___base.html#a1378d073c146b84c910f7df406e2726a">IVRequirement</a>()<span class="keyword"> const</span></div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="keyword"> </span>{<span class="keywordflow">return</span> <a class="code" href="class_simple_keying_interface.html#a88201c180fbfaa9fef2715252546ad6eac1d24de3dedd05c28516f452d3ace417">SimpleKeyingInterface::NOT_RESYNCHRONIZABLE</a>;}</div><div class="line"><a name="l00073"></a><span class="lineno"><a class="line" href="class_sip_hash___base.html#a6e021574291e10fd7b00c030ec550fef"> 73</a></span>  <span class="keyword">virtual</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="class_sip_hash___base.html#a6e021574291e10fd7b00c030ec550fef">IVSize</a>()<span class="keyword"> const</span></div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="keyword"> </span>{<span class="keywordflow">return</span> 0;}</div><div class="line"><a name="l00075"></a><span class="lineno"><a class="line" href="class_sip_hash___base.html#ac4e905e41adc5de41680b6ae5bb4de59"> 75</a></span>  <span class="keyword">virtual</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="class_sip_hash___base.html#ac4e905e41adc5de41680b6ae5bb4de59">OptimalBlockSize</a>()<span class="keyword"> const</span></div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="keyword"> </span>{<span class="keywordflow">return</span> <span class="keyword">sizeof</span>(word64);}</div><div class="line"><a name="l00077"></a><span class="lineno"><a class="line" href="class_sip_hash___base.html#afabeb04484b01c81a02efa314f98cc45"> 77</a></span>  <span class="keyword">virtual</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="class_sip_hash___base.html#afabeb04484b01c81a02efa314f98cc45">OptimalDataAlignment</a> ()<span class="keyword"> const</span></div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="keyword"> </span>{<span class="keywordflow">return</span> GetAlignmentOf<word64>();}</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="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="class_sip_hash___base.html#ac51d4218a3f9638725d6c461077030f6">Update</a>(<span class="keyword">const</span> <span class="keywordtype">byte</span> *input, <span class="keywordtype">size_t</span> length);</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="class_sip_hash___base.html#a28a0acaffcc0aeeb7fe78731d54102dd">TruncatedFinal</a>(<span class="keywordtype">byte</span> *digest, <span class="keywordtype">size_t</span> digestSize);</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="keyword">protected</span>:</div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span> </div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keyword">virtual</span> <span class="keywordtype">void</span> UncheckedSetKey(<span class="keyword">const</span> <span class="keywordtype">byte</span> *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="l00086"></a><span class="lineno"> 86</span>  <span class="keyword">virtual</span> <span class="keywordtype">void</span> Restart();</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="keyword">inline</span> <span class="keywordtype">void</span> SIPROUND()</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>  m_v[0] += m_v[1];</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  m_v[1] = rotlConstant<13>(m_v[1]);</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  m_v[1] ^= m_v[0];</div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  m_v[0] = rotlConstant<32>(m_v[0]);</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  m_v[2] += m_v[3];</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  m_v[3] = rotlConstant<16>(m_v[3]);</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  m_v[3] ^= m_v[2];</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  m_v[0] += m_v[3];</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  m_v[3] = rotlConstant<21>(m_v[3]);</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  m_v[3] ^= m_v[0];</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  m_v[2] += m_v[1];</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  m_v[1] = rotlConstant<17>(m_v[1]);</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  m_v[1] ^= m_v[2];</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  m_v[2] = rotlConstant<32>(m_v[2]);</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> </div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="keyword">private</span>:</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <a class="code" href="class_fixed_size_sec_block.html">FixedSizeSecBlock<word64, 4></a> m_v;</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <a class="code" href="class_fixed_size_sec_block.html">FixedSizeSecBlock<word64, 2></a> m_k;</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <a class="code" href="class_fixed_size_sec_block.html">FixedSizeSecBlock<word64, 2></a> m_b;</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>  <span class="comment">// Tail bytes</span></div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <a class="code" href="class_fixed_size_sec_block.html">FixedSizeSecBlock<byte, 8></a> m_acc;</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <span class="keywordtype">size_t</span> m_idx;</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">/// \brief SipHash message authentication code</span></div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span> <span class="comment">/// \tparam C the number of compression rounds</span></div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <span class="comment">/// \tparam D the number of finalization rounds</span></div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span> <span class="comment">/// \tparam T_128bit flag indicating 128-bit (true) versus 64-bit (false) digest size</span></div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span> <span class="comment">/// \details SipHash computes a 64-bit or 128-bit message authentication code from a variable-length</span></div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span> <span class="comment">/// message and 128-bit secret key. It was designed to be efficient even for short inputs, with</span></div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span> <span class="comment">/// performance comparable to non-cryptographic hash functions.</span></div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span> <span class="comment">/// \details To create a SipHash-2-4 object with a 64-bit MAC use code similar to the following.</span></div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span> <span class="comment">/// <pre> SecByteBlock key(16);</span></div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span> <span class="comment">/// prng.GenerateBlock(key, key.size());</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">/// SipHash<2,4,false> hash(key, key.size());</span></div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span> <span class="comment">/// hash.Update(...);</span></div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span> <span class="comment">/// hash.Final(...);</pre></span></div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span> <span class="comment">/// \details To create a SipHash-2-4 object with a 128-bit MAC use code similar to the following.</span></div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span> <span class="comment">/// <pre> SecByteBlock key(16);</span></div><div class="line"><a name="l00132"></a><span class="lineno"> 132</span> <span class="comment">/// prng.GenerateBlock(key, key.size());</span></div><div class="line"><a name="l00133"></a><span class="lineno"> 133</span> <span class="comment">///</span></div><div class="line"><a name="l00134"></a><span class="lineno"> 134</span> <span class="comment">/// SipHash<2,4,true> hash(key, key.size());</span></div><div class="line"><a name="l00135"></a><span class="lineno"> 135</span> <span class="comment">/// hash.Update(...);</span></div><div class="line"><a name="l00136"></a><span class="lineno"> 136</span> <span class="comment">/// hash.Final(...);</pre></span></div><div class="line"><a name="l00137"></a><span class="lineno"> 137</span> <span class="comment">/// \sa Jean-Philippe Aumasson and Daniel J. Bernstein <A HREF="http://131002.net/siphash/siphash.pdf">SipHash:</span></div><div class="line"><a name="l00138"></a><span class="lineno"> 138</span> <span class="comment">/// a fast short-input PRF</A></span></div><div class="line"><a name="l00139"></a><span class="lineno"> 139</span> <span class="comment">/// \since Crypto++ 6.0</span></div><div class="line"><a name="l00140"></a><span class="lineno"> 140</span> <span class="comment"></span><span class="keyword">template</span> <<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> C=2, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> D=4, <span class="keywordtype">bool</span> T_128bit=false></div><div class="line"><a name="l00141"></a><span class="lineno"><a class="line" href="class_sip_hash.html"> 141</a></span> <span class="keyword">class </span><a class="code" href="class_sip_hash.html">SipHash</a> : <span class="keyword">public</span> <a class="code" href="class_sip_hash___base.html">SipHash_Base</a><C, D, T_128bit></div><div class="line"><a name="l00142"></a><span class="lineno"> 142</span> {</div><div class="line"><a name="l00143"></a><span class="lineno"> 143</span> <span class="keyword">public</span>:<span class="comment"></span></div><div class="line"><a name="l00144"></a><span class="lineno"> 144</span> <span class="comment"> /// \brief Create a SipHash</span></div><div class="line"><a name="l00145"></a><span class="lineno"><a class="line" href="class_sip_hash.html#afed7c9813d47f45264d1ba4362652db4"> 145</a></span> <span class="comment"></span> <a class="code" href="class_sip_hash.html#afed7c9813d47f45264d1ba4362652db4">SipHash</a>()</div><div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  {this->UncheckedSetKey(NULLPTR, 0, <a class="code" href="cryptlib_8h.html#a04be65ada92ccb1e6aac0d94b4cc394b">g_nullNameValuePairs</a>);}<span class="comment"></span></div><div class="line"><a name="l00147"></a><span class="lineno"> 147</span> <span class="comment"> /// \brief Create a SipHash</span></div><div class="line"><a name="l00148"></a><span class="lineno"> 148</span> <span class="comment"> /// \param key a byte array used to key the cipher</span></div><div class="line"><a name="l00149"></a><span class="lineno"> 149</span> <span class="comment"> /// \param length the size of the byte array, in bytes</span></div><div class="line"><a name="l00150"></a><span class="lineno"><a class="line" href="class_sip_hash.html#ae4dcbb0f9895a9470475153a21775f4f"> 150</a></span> <span class="comment"></span> <a class="code" href="class_sip_hash.html#ae4dcbb0f9895a9470475153a21775f4f">SipHash</a>(<span class="keyword">const</span> <span class="keywordtype">byte</span> *key, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> length)</div><div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  {this->UncheckedSetKey(key, length, <a class="code" href="cryptlib_8h.html#a04be65ada92ccb1e6aac0d94b4cc394b">g_nullNameValuePairs</a>);}</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> </div><div class="line"><a name="l00154"></a><span class="lineno"> 154</span> <span class="keyword">template</span> <<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> C, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> D, <span class="keywordtype">bool</span> T_128bit></div><div class="line"><a name="l00155"></a><span class="lineno"><a class="line" href="class_sip_hash___base.html#ac51d4218a3f9638725d6c461077030f6"> 155</a></span> <span class="keywordtype">void</span> <a class="code" href="class_sip_hash___base.html#ac51d4218a3f9638725d6c461077030f6">SipHash_Base<C,D,T_128bit>::Update</a>(<span class="keyword">const</span> <span class="keywordtype">byte</span> *input, <span class="keywordtype">size_t</span> length)</div><div class="line"><a name="l00156"></a><span class="lineno"> 156</span> {</div><div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  <a class="code" href="trap_8h.html#adf3b392588bc94cbeae9f415a78c7b95">CRYPTOPP_ASSERT</a>((input && length) || !length);</div><div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="keywordflow">if</span> (!length) <span class="keywordflow">return</span>;</div><div class="line"><a name="l00159"></a><span class="lineno"> 159</span> </div><div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <span class="keywordflow">if</span> (m_idx)</div><div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  {</div><div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <span class="keywordtype">size_t</span> head = <a class="code" href="misc_8h.html#abe412b0409249cb54899e97bc7d86424">STDMIN</a>(<span class="keywordtype">size_t</span>(8U-m_idx), length);</div><div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  memcpy(m_acc+m_idx, input, head);</div><div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  m_idx += head; input += head; length -= head;</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>  <span class="keywordflow">if</span> (m_idx == 8)</div><div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  {</div><div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  word64 m = GetWord<word64>(<span class="keyword">true</span>, <a class="code" href="cryptlib_8h.html#aaeb92d42f5a6e27b8ba19f18d69d142baccd5b3585bd07d6bdae383aa8271b9d2">LITTLE_ENDIAN_ORDER</a>, m_acc);</div><div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  m_v[3] ^= m;</div><div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i = 0; i < C; ++i)</div><div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  SIPROUND();</div><div class="line"><a name="l00172"></a><span class="lineno"> 172</span> </div><div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  m_v[0] ^= m;</div><div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  m_b[0] += 8;</div><div class="line"><a name="l00175"></a><span class="lineno"> 175</span> </div><div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  m_idx = 0;</div><div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  }</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> </div><div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  <span class="keywordflow">while</span> (length >= 8)</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>  word64 m = GetWord<word64>(<span class="keyword">false</span>, <a class="code" href="cryptlib_8h.html#aaeb92d42f5a6e27b8ba19f18d69d142baccd5b3585bd07d6bdae383aa8271b9d2">LITTLE_ENDIAN_ORDER</a>, input);</div><div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  m_v[3] ^= m;</div><div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i = 0; i < C; ++i)</div><div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  SIPROUND();</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>  m_v[0] ^= m;</div><div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  m_b[0] += 8;</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>  input += 8;</div><div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  length -= 8;</div><div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  }</div><div class="line"><a name="l00193"></a><span class="lineno"> 193</span> </div><div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  <a class="code" href="trap_8h.html#adf3b392588bc94cbeae9f415a78c7b95">CRYPTOPP_ASSERT</a>(length < 8);</div><div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  <span class="keywordtype">size_t</span> tail = length % 8;</div><div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  <span class="keywordflow">if</span> (tail)</div><div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  {</div><div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  memcpy(m_acc+m_idx, input, tail);</div><div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  m_idx += tail;</div><div class="line"><a name="l00200"></a><span class="lineno"> 200</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> <span class="keyword">template</span> <<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> C, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> D, <span class="keywordtype">bool</span> T_128bit></div><div class="line"><a name="l00204"></a><span class="lineno"><a class="line" href="class_sip_hash___base.html#a28a0acaffcc0aeeb7fe78731d54102dd"> 204</a></span> <span class="keywordtype">void</span> <a class="code" href="class_sip_hash___base.html#a28a0acaffcc0aeeb7fe78731d54102dd">SipHash_Base<C,D,T_128bit>::TruncatedFinal</a>(<span class="keywordtype">byte</span> *digest, <span class="keywordtype">size_t</span> digestSize)</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>  <a class="code" href="trap_8h.html#adf3b392588bc94cbeae9f415a78c7b95">CRYPTOPP_ASSERT</a>(digest); <span class="comment">// Pointer is valid</span></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>  ThrowIfInvalidTruncatedSize(digestSize);</div><div class="line"><a name="l00209"></a><span class="lineno"> 209</span> </div><div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  <span class="comment">// The high octet holds length and is digested mod 256</span></div><div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  m_b[0] += m_idx; m_b[0] <<= 56U;</div><div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  <span class="keywordflow">switch</span> (m_idx)</div><div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  {</div><div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  <span class="keywordflow">case</span> 7:</div><div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  m_b[0] |= ((word64)m_acc[6]) << 48;</div><div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  <span class="comment">// fall through</span></div><div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  <span class="keywordflow">case</span> 6:</div><div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  m_b[0] |= ((word64)m_acc[5]) << 40;</div><div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  <span class="comment">// fall through</span></div><div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  <span class="keywordflow">case</span> 5:</div><div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  m_b[0] |= ((word64)m_acc[4]) << 32;</div><div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  <span class="comment">// fall through</span></div><div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  <span class="keywordflow">case</span> 4:</div><div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  m_b[0] |= ((word64)m_acc[3]) << 24;</div><div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  <span class="comment">// fall through</span></div><div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  <span class="keywordflow">case</span> 3:</div><div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  m_b[0] |= ((word64)m_acc[2]) << 16;</div><div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  <span class="comment">// fall through</span></div><div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  <span class="keywordflow">case</span> 2:</div><div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  m_b[0] |= ((word64)m_acc[1]) << 8;</div><div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  <span class="comment">// fall through</span></div><div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  <span class="keywordflow">case</span> 1:</div><div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  m_b[0] |= ((word64)m_acc[0]);</div><div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  <span class="comment">// fall through</span></div><div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  <span class="keywordflow">case</span> 0:</div><div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  <span class="keywordflow">break</span>;</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>  m_v[3] ^= m_b[0];</div><div class="line"><a name="l00240"></a><span class="lineno"> 240</span> </div><div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i=0; i<C; i++)</div><div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  SIPROUND();</div><div class="line"><a name="l00243"></a><span class="lineno"> 243</span> </div><div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  m_v[0] ^= m_b[0];</div><div class="line"><a name="l00245"></a><span class="lineno"> 245</span> </div><div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  <span class="keywordflow">if</span> (T_128bit)</div><div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  m_v[2] ^= 0xee;</div><div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  <span class="keywordflow">else</span></div><div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  m_v[2] ^= 0xff;</div><div class="line"><a name="l00250"></a><span class="lineno"> 250</span> </div><div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i=0; i<D; i++)</div><div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  SIPROUND();</div><div class="line"><a name="l00253"></a><span class="lineno"> 253</span> </div><div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  m_b[0] = m_v[0] ^ m_v[1] ^ m_v[2] ^ m_v[3];</div><div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  m_b[0] = <a class="code" href="misc_8h.html#a8e499ded4f2e7e7705c3cfd39cdf137f">ConditionalByteReverse</a>(<a class="code" href="cryptlib_8h.html#aaeb92d42f5a6e27b8ba19f18d69d142baccd5b3585bd07d6bdae383aa8271b9d2">LITTLE_ENDIAN_ORDER</a>, m_b[0]);</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>  <span class="keywordflow">if</span> (T_128bit)</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>  m_v[1] ^= 0xdd;</div><div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  <span class="keywordflow">for</span> (<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i = 0; i<D; ++i)</div><div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  SIPROUND();</div><div class="line"><a name="l00262"></a><span class="lineno"> 262</span> </div><div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  m_b[1] = m_v[0] ^ m_v[1] ^ m_v[2] ^ m_v[3];</div><div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  m_b[1] = <a class="code" href="misc_8h.html#a8e499ded4f2e7e7705c3cfd39cdf137f">ConditionalByteReverse</a>(<a class="code" href="cryptlib_8h.html#aaeb92d42f5a6e27b8ba19f18d69d142baccd5b3585bd07d6bdae383aa8271b9d2">LITTLE_ENDIAN_ORDER</a>, m_b[1]);</div><div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  }</div><div class="line"><a name="l00266"></a><span class="lineno"> 266</span> </div><div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  <a class="code" href="misc_8h.html#a5f6fcbaaf6f72fe46a6d911b033dfea0">memcpy_s</a>(digest, digestSize, m_b.begin(), <a class="code" href="misc_8h.html#abe412b0409249cb54899e97bc7d86424">STDMIN</a>(digestSize, (<span class="keywordtype">size_t</span>)<a class="code" href="class_sip_hash___info.html">SipHash_Info<T_128bit>::DIGESTSIZE</a>));</div><div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  Restart();</div><div class="line"><a name="l00269"></a><span class="lineno"> 269</span> }</div><div class="line"><a name="l00270"></a><span class="lineno"> 270</span> </div><div class="line"><a name="l00271"></a><span class="lineno"> 271</span> <span class="keyword">template</span> <<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> C, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> D, <span class="keywordtype">bool</span> T_128bit></div><div class="line"><a name="l00272"></a><span class="lineno"> 272</span> <span class="keywordtype">void</span> <a class="code" href="class_sip_hash___base.html">SipHash_Base<C,D,T_128bit>::UncheckedSetKey</a>(<span class="keyword">const</span> <span class="keywordtype">byte</span> *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="l00273"></a><span class="lineno"> 273</span> {</div><div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  CRYPTOPP_UNUSED(params);</div><div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  <span class="keywordflow">if</span> (key && length)</div><div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  {</div><div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  m_k[0] = GetWord<word64>(<span class="keyword">false</span>, <a class="code" href="cryptlib_8h.html#aaeb92d42f5a6e27b8ba19f18d69d142baccd5b3585bd07d6bdae383aa8271b9d2">LITTLE_ENDIAN_ORDER</a>, key);</div><div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  m_k[1] = GetWord<word64>(<span class="keyword">false</span>, <a class="code" href="cryptlib_8h.html#aaeb92d42f5a6e27b8ba19f18d69d142baccd5b3585bd07d6bdae383aa8271b9d2">LITTLE_ENDIAN_ORDER</a>, key+8);</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>  <span class="keywordflow">else</span></div><div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  {</div><div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  <span class="comment">// Avoid Coverity finding</span></div><div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  m_k[0] = m_k[1] = 0;</div><div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  }</div><div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  Restart();</div><div class="line"><a name="l00286"></a><span class="lineno"> 286</span> }</div><div class="line"><a name="l00287"></a><span class="lineno"> 287</span> </div><div class="line"><a name="l00288"></a><span class="lineno"> 288</span> <span class="keyword">template</span> <<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> C, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> D, <span class="keywordtype">bool</span> T_128bit></div><div class="line"><a name="l00289"></a><span class="lineno"> 289</span> <span class="keywordtype">void</span> <a class="code" href="class_sip_hash___base.html">SipHash_Base<C,D,T_128bit>::Restart</a> ()</div><div class="line"><a name="l00290"></a><span class="lineno"> 290</span> {</div><div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  m_v[0] = W64LIT(0x736f6d6570736575);</div><div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  m_v[1] = W64LIT(0x646f72616e646f6d);</div><div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  m_v[2] = W64LIT(0x6c7967656e657261);</div><div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  m_v[3] = W64LIT(0x7465646279746573);</div><div class="line"><a name="l00295"></a><span class="lineno"> 295</span> </div><div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  m_v[3] ^= m_k[1];</div><div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  m_v[2] ^= m_k[0];</div><div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  m_v[1] ^= m_k[1];</div><div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  m_v[0] ^= m_k[0];</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="keywordflow">if</span> (T_128bit)</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>  m_v[1] ^= 0xee;</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> </div><div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  m_idx = 0;</div><div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  m_b[0] = 0;</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> </div><div class="line"><a name="l00310"></a><span class="lineno"> 310</span> NAMESPACE_END</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="preprocessor">#endif // CRYPTOPP_SIPHASH_H</span></div><div class="ttc" id="class_sip_hash___base_html_a6e021574291e10fd7b00c030ec550fef"><div class="ttname"><a href="class_sip_hash___base.html#a6e021574291e10fd7b00c030ec550fef">SipHash_Base::IVSize</a></div><div class="ttdeci">virtual unsigned int IVSize() const</div><div class="ttdoc">Returns length of the IV accepted by this object.</div><div class="ttdef"><b>Definition:</b> <a href="siphash_8h_source.html#l00073">siphash.h:73</a></div></div>
<div class="ttc" id="class_sip_hash___info_html"><div class="ttname"><a href="class_sip_hash___info.html">SipHash_Info</a></div><div class="ttdoc">SipHash message authentication code information.</div><div class="ttdef"><b>Definition:</b> <a href="siphash_8h_source.html#l00038">siphash.h:38</a></div></div>
<div class="ttc" id="class_message_authentication_code_html"><div class="ttname"><a href="class_message_authentication_code.html">MessageAuthenticationCode</a></div><div class="ttdoc">Interface for message authentication codes.</div><div class="ttdef"><b>Definition:</b> <a href="cryptlib_8h_source.html#l01245">cryptlib.h:1245</a></div></div>
<div class="ttc" id="class_fixed_key_length_html"><div class="ttname"><a href="class_fixed_key_length.html">FixedKeyLength</a></div><div class="ttdoc">Inherited by keyed algorithms with fixed key length.</div><div class="ttdef"><b>Definition:</b> <a href="seckey_8h_source.html#l00147">seckey.h:147</a></div></div>
<div class="ttc" id="class_sip_hash___base_html"><div class="ttname"><a href="class_sip_hash___base.html">SipHash_Base</a></div><div class="ttdoc">SipHash message authentication code base class.</div><div class="ttdef"><b>Definition:</b> <a href="siphash_8h_source.html#l00050">siphash.h:50</a></div></div>
<div class="ttc" id="misc_8h_html"><div class="ttname"><a href="misc_8h.html">misc.h</a></div><div class="ttdoc">Utility functions for the Crypto++ library.</div></div>
<div class="ttc" id="class_sip_hash_html"><div class="ttname"><a href="class_sip_hash.html">SipHash</a></div><div class="ttdoc">SipHash message authentication code.</div><div class="ttdef"><b>Definition:</b> <a href="siphash_8h_source.html#l00141">siphash.h:141</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="misc_8h_html_a5f6fcbaaf6f72fe46a6d911b033dfea0"><div class="ttname"><a href="misc_8h.html#a5f6fcbaaf6f72fe46a6d911b033dfea0">memcpy_s</a></div><div class="ttdeci">void memcpy_s(void *dest, size_t sizeInBytes, const void *src, size_t count)</div><div class="ttdoc">Bounds checking replacement for memcpy()</div><div class="ttdef"><b>Definition:</b> <a href="misc_8h_source.html#l00383">misc.h:383</a></div></div>
<div class="ttc" id="class_sip_hash___base_html_ac51d4218a3f9638725d6c461077030f6"><div class="ttname"><a href="class_sip_hash___base.html#ac51d4218a3f9638725d6c461077030f6">SipHash_Base::Update</a></div><div class="ttdeci">virtual void Update(const byte *input, size_t length)</div><div class="ttdoc">Updates a hash with additional input.</div><div class="ttdef"><b>Definition:</b> <a href="siphash_8h_source.html#l00155">siphash.h:155</a></div></div>
<div class="ttc" id="class_sip_hash___base_html_afabeb04484b01c81a02efa314f98cc45"><div class="ttname"><a href="class_sip_hash___base.html#afabeb04484b01c81a02efa314f98cc45">SipHash_Base::OptimalDataAlignment</a></div><div class="ttdeci">virtual unsigned int OptimalDataAlignment() const</div><div class="ttdoc">Provides input and output data alignment for optimal performance.</div><div class="ttdef"><b>Definition:</b> <a href="siphash_8h_source.html#l00077">siphash.h:77</a></div></div>
<div class="ttc" id="class_simple_keying_interface_html_a88201c180fbfaa9fef2715252546ad6eac1d24de3dedd05c28516f452d3ace417"><div class="ttname"><a href="class_simple_keying_interface.html#a88201c180fbfaa9fef2715252546ad6eac1d24de3dedd05c28516f452d3ace417">SimpleKeyingInterface::NOT_RESYNCHRONIZABLE</a></div><div class="ttdoc">The object does not use an IV.</div><div class="ttdef"><b>Definition:</b> <a href="cryptlib_8h_source.html#l00682">cryptlib.h:682</a></div></div>
<div class="ttc" id="class_sip_hash___base_html_ac97ba8f34aed91ab3eb1a66dad3c0471"><div class="ttname"><a href="class_sip_hash___base.html#ac97ba8f34aed91ab3eb1a66dad3c0471">SipHash_Base::DigestSize</a></div><div class="ttdeci">virtual unsigned int DigestSize() const</div><div class="ttdoc">Provides the digest size of the hash.</div><div class="ttdef"><b>Definition:</b> <a href="siphash_8h_source.html#l00061">siphash.h:61</a></div></div>
<div class="ttc" id="class_sip_hash___base_html_a7159b984bca8bc816b0ff0377ebaa319"><div class="ttname"><a href="class_sip_hash___base.html#a7159b984bca8bc816b0ff0377ebaa319">SipHash_Base::MinKeyLength</a></div><div class="ttdeci">virtual size_t MinKeyLength() const</div><div class="ttdoc">Returns smallest valid key length.</div><div class="ttdef"><b>Definition:</b> <a href="siphash_8h_source.html#l00063">siphash.h:63</a></div></div>
<div class="ttc" id="class_sip_hash___base_html_a1378d073c146b84c910f7df406e2726a"><div class="ttname"><a href="class_sip_hash___base.html#a1378d073c146b84c910f7df406e2726a">SipHash_Base::IVRequirement</a></div><div class="ttdeci">virtual IV_Requirement IVRequirement() const</div><div class="ttdoc">Minimal requirement for secure IVs.</div><div class="ttdef"><b>Definition:</b> <a href="siphash_8h_source.html#l00071">siphash.h:71</a></div></div>
<div class="ttc" id="cryptlib_8h_html_aaeb92d42f5a6e27b8ba19f18d69d142baccd5b3585bd07d6bdae383aa8271b9d2"><div class="ttname"><a href="cryptlib_8h.html#aaeb92d42f5a6e27b8ba19f18d69d142baccd5b3585bd07d6bdae383aa8271b9d2">LITTLE_ENDIAN_ORDER</a></div><div class="ttdoc">byte order is little-endian</div><div class="ttdef"><b>Definition:</b> <a href="cryptlib_8h_source.html#l00142">cryptlib.h:142</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_sip_hash_html_ae4dcbb0f9895a9470475153a21775f4f"><div class="ttname"><a href="class_sip_hash.html#ae4dcbb0f9895a9470475153a21775f4f">SipHash::SipHash</a></div><div class="ttdeci">SipHash(const byte *key, unsigned int length)</div><div class="ttdoc">Create a SipHash.</div><div class="ttdef"><b>Definition:</b> <a href="siphash_8h_source.html#l00150">siphash.h:150</a></div></div>
<div class="ttc" id="misc_8h_html_a8e499ded4f2e7e7705c3cfd39cdf137f"><div class="ttname"><a href="misc_8h.html#a8e499ded4f2e7e7705c3cfd39cdf137f">ConditionalByteReverse</a></div><div class="ttdeci">T ConditionalByteReverse(ByteOrder order, T value)</div><div class="ttdoc">Reverses bytes in a value depending upon endianness.</div><div class="ttdef"><b>Definition:</b> <a href="misc_8h_source.html#l01979">misc.h:1979</a></div></div>
<div class="ttc" id="class_sip_hash___base_html_ad60daf12e6e57c05d5d0f91253715b55"><div class="ttname"><a href="class_sip_hash___base.html#ad60daf12e6e57c05d5d0f91253715b55">SipHash_Base::DefaultKeyLength</a></div><div class="ttdeci">virtual size_t DefaultKeyLength() const</div><div class="ttdoc">Returns default key length.</div><div class="ttdef"><b>Definition:</b> <a href="siphash_8h_source.html#l00067">siphash.h:67</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< word64, 4 ></a></div></div>
<div class="ttc" id="misc_8h_html_abe412b0409249cb54899e97bc7d86424"><div class="ttname"><a href="misc_8h.html#abe412b0409249cb54899e97bc7d86424">STDMIN</a></div><div class="ttdeci">const T & STDMIN(const T &a, const T &b)</div><div class="ttdoc">Replacement function for std::min.</div><div class="ttdef"><b>Definition:</b> <a href="misc_8h_source.html#l00507">misc.h:507</a></div></div>
<div class="ttc" id="trap_8h_html_adf3b392588bc94cbeae9f415a78c7b95"><div class="ttname"><a href="trap_8h.html#adf3b392588bc94cbeae9f415a78c7b95">CRYPTOPP_ASSERT</a></div><div class="ttdeci">#define CRYPTOPP_ASSERT(exp)</div><div class="ttdoc">Debugging and diagnostic assertion.</div><div class="ttdef"><b>Definition:</b> <a href="trap_8h_source.html#l00060">trap.h:60</a></div></div>
<div class="ttc" id="class_sip_hash___base_html_ac4e905e41adc5de41680b6ae5bb4de59"><div class="ttname"><a href="class_sip_hash___base.html#ac4e905e41adc5de41680b6ae5bb4de59">SipHash_Base::OptimalBlockSize</a></div><div class="ttdeci">virtual unsigned int OptimalBlockSize() const</div><div class="ttdoc">Provides the input block size most efficient for this hash.</div><div class="ttdef"><b>Definition:</b> <a href="siphash_8h_source.html#l00075">siphash.h:75</a></div></div>
<div class="ttc" id="cryptlib_8h_html_a04be65ada92ccb1e6aac0d94b4cc394b"><div class="ttname"><a href="cryptlib_8h.html#a04be65ada92ccb1e6aac0d94b4cc394b">g_nullNameValuePairs</a></div><div class="ttdeci">const NameValuePairs g_nullNameValuePairs</div><div class="ttdoc">An empty set of name-value pairs.</div><div class="ttdef"><b>Definition:</b> <a href="cryptlib_8h_source.html#l00494">cryptlib.h:494</a></div></div>
<div class="ttc" id="class_simple_keying_interface_html_a88201c180fbfaa9fef2715252546ad6e"><div class="ttname"><a href="class_simple_keying_interface.html#a88201c180fbfaa9fef2715252546ad6e">SimpleKeyingInterface::IV_Requirement</a></div><div class="ttdeci">IV_Requirement</div><div class="ttdoc">Secure IVs requirements as enumerated values.</div><div class="ttdef"><b>Definition:</b> <a href="cryptlib_8h_source.html#l00672">cryptlib.h:672</a></div></div>
<div class="ttc" id="class_sip_hash___base_html_af84df4a4ae080dff7f1e530e1eaddf68"><div class="ttname"><a href="class_sip_hash___base.html#af84df4a4ae080dff7f1e530e1eaddf68">SipHash_Base::GetValidKeyLength</a></div><div class="ttdeci">virtual size_t GetValidKeyLength(size_t keylength) const</div><div class="ttdoc">Returns a valid key length for the algorithm.</div><div class="ttdef"><b>Definition:</b> <a href="siphash_8h_source.html#l00069">siphash.h:69</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="class_sip_hash_html_afed7c9813d47f45264d1ba4362652db4"><div class="ttname"><a href="class_sip_hash.html#afed7c9813d47f45264d1ba4362652db4">SipHash::SipHash</a></div><div class="ttdeci">SipHash()</div><div class="ttdoc">Create a SipHash.</div><div class="ttdef"><b>Definition:</b> <a href="siphash_8h_source.html#l00145">siphash.h:145</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_sip_hash___base_html_add4d714a7b48484b93133fc29f4b99d9"><div class="ttname"><a href="class_sip_hash___base.html#add4d714a7b48484b93133fc29f4b99d9">SipHash_Base::MaxKeyLength</a></div><div class="ttdeci">virtual size_t MaxKeyLength() const</div><div class="ttdoc">Returns largest valid key length.</div><div class="ttdef"><b>Definition:</b> <a href="siphash_8h_source.html#l00065">siphash.h:65</a></div></div>
<div class="ttc" id="class_sip_hash___base_html_a28a0acaffcc0aeeb7fe78731d54102dd"><div class="ttname"><a href="class_sip_hash___base.html#a28a0acaffcc0aeeb7fe78731d54102dd">SipHash_Base::TruncatedFinal</a></div><div class="ttdeci">virtual void TruncatedFinal(byte *digest, size_t digestSize)</div><div class="ttdoc">Computes the hash of the current message.</div><div class="ttdef"><b>Definition:</b> <a href="siphash_8h_source.html#l00204">siphash.h:204</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>
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