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Crypto++是一个非常强大的密码学库,主要是功能全

00072                 params.<a class="code" href="class_d_l___group_parameters.html#_d_l___group_parametersa19">EncodeElement</a>(<span class="keyword">true</span>, y, privateKey+<a class="code" href="class_m_q_v___domain.html#_m_q_v___domaina10">StaticPrivateKeyLength</a>());
00073         }
00074 
<a name="l00075"></a><a class="code" href="class_m_q_v___domain.html#_m_q_v___domaina17">00075</a>         <span class="keywordtype">void</span> <a class="code" href="class_m_q_v___domain.html#_m_q_v___domaina17">GenerateEphemeralPublicKey</a>(<a class="code" href="class_random_number_generator.html">RandomNumberGenerator</a> &amp;rng, <span class="keyword">const</span> byte *privateKey, byte *publicKey)<span class="keyword"> const</span>
00076 <span class="keyword">        </span>{
00077                 memcpy(publicKey, privateKey+<a class="code" href="class_m_q_v___domain.html#_m_q_v___domaina10">StaticPrivateKeyLength</a>(), <a class="code" href="class_m_q_v___domain.html#_m_q_v___domaina15">EphemeralPublicKeyLength</a>());
00078         }
00079 
<a name="l00080"></a><a class="code" href="class_m_q_v___domain.html#_m_q_v___domaina18">00080</a>         <span class="keywordtype">bool</span> <a class="code" href="class_m_q_v___domain.html#_m_q_v___domaina18">Agree</a>(byte *agreedValue,
00081                 <span class="keyword">const</span> byte *staticPrivateKey, <span class="keyword">const</span> byte *ephemeralPrivateKey, 
00082                 <span class="keyword">const</span> byte *staticOtherPublicKey, <span class="keyword">const</span> byte *ephemeralOtherPublicKey,
00083                 <span class="keywordtype">bool</span> validateStaticOtherPublicKey=<span class="keyword">true</span>)<span class="keyword"> const</span>
00084 <span class="keyword">        </span>{
00085                 <span class="keywordflow">try</span>
00086                 {
00087                         <span class="keyword">const</span> <a class="code" href="class_d_l___group_parameters.html">DL_GroupParameters&lt;Element&gt;</a> &amp;params = GetAbstractGroupParameters();
00088                         Element WW = params.<a class="code" href="class_d_l___group_parameters.html#_d_l___group_parametersa20">DecodeElement</a>(staticOtherPublicKey, validateStaticOtherPublicKey);
00089                         Element VV = params.<a class="code" href="class_d_l___group_parameters.html#_d_l___group_parametersa20">DecodeElement</a>(ephemeralOtherPublicKey, <span class="keyword">true</span>);
00090 
00091                         <a class="code" href="class_integer.html">Integer</a> s(staticPrivateKey, <a class="code" href="class_m_q_v___domain.html#_m_q_v___domaina10">StaticPrivateKeyLength</a>());
00092                         <a class="code" href="class_integer.html">Integer</a> u(ephemeralPrivateKey, <a class="code" href="class_m_q_v___domain.html#_m_q_v___domaina10">StaticPrivateKeyLength</a>());
00093                         Element V = params.<a class="code" href="class_d_l___group_parameters.html#_d_l___group_parametersa20">DecodeElement</a>(ephemeralPrivateKey+<a class="code" href="class_m_q_v___domain.html#_m_q_v___domaina10">StaticPrivateKeyLength</a>(), <span class="keyword">false</span>);
00094 
00095                         <span class="keyword">const</span> <a class="code" href="class_integer.html">Integer</a> &amp;r = params.<a class="code" href="class_d_l___group_parameters.html#_d_l___group_parametersa14">GetSubgroupOrder</a>();
00096                         <a class="code" href="class_integer.html">Integer</a> h2 = <a class="code" href="class_integer.html#_integerz37_13">Integer::Power2</a>((r.<a class="code" href="class_integer.html#_integerz41_2">BitCount</a>()+1)/2);
00097                         <a class="code" href="class_integer.html">Integer</a> e = ((h2+params.<a class="code" href="class_d_l___group_parameters.html#_d_l___group_parametersa21">ConvertElementToInteger</a>(V)%h2)*s+u) % r;
00098                         <a class="code" href="class_integer.html">Integer</a> tt = h2 + params.<a class="code" href="class_d_l___group_parameters.html#_d_l___group_parametersa21">ConvertElementToInteger</a>(VV) % h2;
00099 
00100                         <span class="keywordflow">if</span> (COFACTOR_OPTION::ToEnum() == NO_COFACTOR_MULTIPLICTION)
00101                         {
00102                                 Element P = params.<a class="code" href="class_d_l___group_parameters.html#_d_l___group_parametersa10">ExponentiateElement</a>(WW, tt);
00103                                 P = m_groupParameters.MultiplyElements(P, VV);
00104                                 Element R[2];
00105                                 <span class="keyword">const</span> <a class="code" href="class_integer.html">Integer</a> e2[2] = {r, e};
00106                                 params.<a class="code" href="class_d_l___group_parameters.html#_d_l___group_parametersa26">SimultaneousExponentiate</a>(R, P, e2, 2);
00107                                 <span class="keywordflow">if</span> (!params.<a class="code" href="class_d_l___group_parameters.html#_d_l___group_parametersa25">IsIdentity</a>(R[0]) || params.<a class="code" href="class_d_l___group_parameters.html#_d_l___group_parametersa25">IsIdentity</a>(R[1]))
00108                                         <span class="keywordflow">return</span> <span class="keyword">false</span>;
00109                                 params.<a class="code" href="class_d_l___group_parameters.html#_d_l___group_parametersa19">EncodeElement</a>(<span class="keyword">false</span>, R[1], agreedValue);
00110                         }
00111                         <span class="keywordflow">else</span>
00112                         {
00113                                 <span class="keyword">const</span> <a class="code" href="class_integer.html">Integer</a> &amp;k = params.<a class="code" href="class_d_l___group_parameters.html#_d_l___group_parametersa17">GetCofactor</a>();
00114                                 <span class="keywordflow">if</span> (COFACTOR_OPTION::ToEnum() == COMPATIBLE_COFACTOR_MULTIPLICTION)
00115                                         e = <a class="code" href="class_modular_arithmetic.html">ModularArithmetic</a>(r).Divide(e, k);
00116                                 Element P = m_groupParameters.CascadeExponentiate(VV, k*e, WW, k*(e*tt%r));
00117                                 <span class="keywordflow">if</span> (params.<a class="code" href="class_d_l___group_parameters.html#_d_l___group_parametersa25">IsIdentity</a>(P))
00118                                         <span class="keywordflow">return</span> <span class="keyword">false</span>;
00119                                 params.<a class="code" href="class_d_l___group_parameters.html#_d_l___group_parametersa19">EncodeElement</a>(<span class="keyword">false</span>, P, agreedValue);
00120                         }
00121                 }
00122                 <span class="keywordflow">catch</span> (DL_BadElement &amp;)
00123                 {
00124                         <span class="keywordflow">return</span> <span class="keyword">false</span>;
00125                 }
00126                 <span class="keywordflow">return</span> <span class="keyword">true</span>;
00127         }
00128 
00129 <span class="keyword">private</span>:
00130         <a class="code" href="class_d_l___group_parameters.html">DL_GroupParameters&lt;Element&gt;</a> &amp; AccessAbstractGroupParameters() {<span class="keywordflow">return</span> m_groupParameters;}
00131         <span class="keyword">const</span> <a class="code" href="class_d_l___group_parameters.html">DL_GroupParameters&lt;Element&gt;</a> &amp; GetAbstractGroupParameters()<span class="keyword"> const </span>{<span class="keywordflow">return</span> m_groupParameters;}
00132 
00133         GroupParameters m_groupParameters;
00134 };
00135 <span class="comment"></span>
00136 <span class="comment">//! Menezes-Qu-Vanstone in GF(p) with key validation, AKA &lt;a href="http://www.weidai.com/scan-mirror/ka.html#MQV"&gt;MQV&lt;/a&gt;</span>
<a name="l00137"></a><a class="code" href="mqv_8h.html#a0">00137</a> <span class="comment"></span><span class="keyword">typedef</span> <a class="code" href="class_m_q_v___domain.html">MQV_Domain&lt;DL_GroupParameters_GFP_DefaultSafePrime&gt;</a> <a class="code" href="class_m_q_v___domain.html">MQV</a>;
00138 
00139 NAMESPACE_END
00140 
00141 <span class="preprocessor">#endif</span>
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