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著名的密码库Crypto++的文档 C++语言的杰作。程序员必备。

<a name="l00059"></a>00059         <span class="keywordflow">return</span> GetValueHelper(<span class="keyword">this</span>, name, valueType, pValue).Assignable()
<a name="l00060"></a>00060                 CRYPTOPP_GET_FUNCTION_ENTRY(Modulus)
<a name="l00061"></a>00061                 CRYPTOPP_GET_FUNCTION_ENTRY(PublicExponent)
<a name="l00062"></a>00062                 ;
<a name="l00063"></a>00063 }
<a name="l00064"></a>00064 
<a name="l00065"></a><a class="code" href="class_e_s_i_g_n_function.html#1ff8229ed7786a13a69d15e5a64e4d21">00065</a> <span class="keywordtype">void</span> <a class="code" href="class_e_s_i_g_n_function.html#1ff8229ed7786a13a69d15e5a64e4d21" title="assign values from source to this object">ESIGNFunction::AssignFrom</a>(<span class="keyword">const</span> <a class="code" href="class_name_value_pairs.html" title="interface for retrieving values given their names">NameValuePairs</a> &amp;source)
<a name="l00066"></a>00066 {
<a name="l00067"></a>00067         AssignFromHelper(<span class="keyword">this</span>, source)
<a name="l00068"></a>00068                 CRYPTOPP_SET_FUNCTION_ENTRY(Modulus)
<a name="l00069"></a>00069                 CRYPTOPP_SET_FUNCTION_ENTRY(PublicExponent)
<a name="l00070"></a>00070                 ;
<a name="l00071"></a>00071 }
<a name="l00072"></a>00072 
<a name="l00073"></a>00073 <span class="comment">// *****************************************************************************</span>
<a name="l00074"></a>00074 
<a name="l00075"></a><a class="code" href="class_invertible_e_s_i_g_n_function.html#241b733193f9f420f188ca6f57d49c27">00075</a> <span class="keywordtype">void</span> <a class="code" href="class_invertible_e_s_i_g_n_function.html#241b733193f9f420f188ca6f57d49c27">InvertibleESIGNFunction::GenerateRandom</a>(<a class="code" href="class_random_number_generator.html" title="interface for random number generators">RandomNumberGenerator</a> &amp;rng, <span class="keyword">const</span> <a class="code" href="class_name_value_pairs.html" title="interface for retrieving values given their names">NameValuePairs</a> &amp;param)
<a name="l00076"></a>00076 {
<a name="l00077"></a>00077         <span class="keywordtype">int</span> modulusSize = 1023*2;
<a name="l00078"></a>00078         param.<a class="code" href="class_name_value_pairs.html#39b6daefcabcdd07f5ae482a075e1728" title="get a named value with type int">GetIntValue</a>(<span class="stringliteral">"ModulusSize"</span>, modulusSize) || param.<a class="code" href="class_name_value_pairs.html#39b6daefcabcdd07f5ae482a075e1728" title="get a named value with type int">GetIntValue</a>(<span class="stringliteral">"KeySize"</span>, modulusSize);
<a name="l00079"></a>00079 
<a name="l00080"></a>00080         <span class="keywordflow">if</span> (modulusSize &lt; 24)
<a name="l00081"></a>00081                 <span class="keywordflow">throw</span> <a class="code" href="class_invalid_argument.html" title="exception thrown when an invalid argument is detected">InvalidArgument</a>(<span class="stringliteral">"InvertibleESIGNFunction: specified modulus size is too small"</span>);
<a name="l00082"></a>00082 
<a name="l00083"></a>00083         <span class="keywordflow">if</span> (modulusSize % 3 != 0)
<a name="l00084"></a>00084                 <span class="keywordflow">throw</span> <a class="code" href="class_invalid_argument.html" title="exception thrown when an invalid argument is detected">InvalidArgument</a>(<span class="stringliteral">"InvertibleESIGNFunction: modulus size must be divisible by 3"</span>);
<a name="l00085"></a>00085 
<a name="l00086"></a>00086         <a class="code" href="class_e_s_i_g_n_function.html#086e17e8047753768b22c6b59faebf60">m_e</a> = param.<a class="code" href="class_name_value_pairs.html#943b2009297783f1c35bae46efc3b5f7" title="get a named value, returns the default if the name doesn't exist">GetValueWithDefault</a>(<span class="stringliteral">"PublicExponent"</span>, <a class="code" href="class_integer.html" title="multiple precision integer and basic arithmetics">Integer</a>(32));
<a name="l00087"></a>00087 
<a name="l00088"></a>00088         <span class="keywordflow">if</span> (<a class="code" href="class_e_s_i_g_n_function.html#086e17e8047753768b22c6b59faebf60">m_e</a> &lt; 8)
<a name="l00089"></a>00089                 <span class="keywordflow">throw</span> <a class="code" href="class_invalid_argument.html" title="exception thrown when an invalid argument is detected">InvalidArgument</a>(<span class="stringliteral">"InvertibleESIGNFunction: public exponents less than 8 may not be secure"</span>);
<a name="l00090"></a>00090 
<a name="l00091"></a>00091         <span class="comment">// VC70 workaround: putting these after primeParam causes overlapped stack allocation</span>
<a name="l00092"></a>00092         <a class="code" href="class_const_byte_array_parameter.html" title="used to pass byte array input as part of a NameValuePairs object">ConstByteArrayParameter</a> seedParam;
<a name="l00093"></a>00093         <a class="code" href="class_sec_block.html" title="a block of memory allocated using A">SecByteBlock</a> seed;
<a name="l00094"></a>00094 
<a name="l00095"></a>00095         <span class="keyword">const</span> <a class="code" href="class_integer.html" title="multiple precision integer and basic arithmetics">Integer</a> minP = <a class="code" href="class_integer.html" title="multiple precision integer and basic arithmetics">Integer</a>(204) &lt;&lt; (modulusSize/3-8);
<a name="l00096"></a>00096         <span class="keyword">const</span> <a class="code" href="class_integer.html" title="multiple precision integer and basic arithmetics">Integer</a> maxP = <a class="code" href="class_integer.html#de53248f5dbb520273a70856b975417c" title="return the integer 2**e">Integer::Power2</a>(modulusSize/3)-1;
<a name="l00097"></a>00097         <span class="keyword">const</span> <a class="code" href="class_name_value_pairs.html" title="interface for retrieving values given their names">NameValuePairs</a> &amp;primeParam = MakeParameters(<span class="stringliteral">"Min"</span>, minP)(<span class="stringliteral">"Max"</span>, maxP)(<span class="stringliteral">"RandomNumberType"</span>, <a class="code" href="class_integer.html#9b4088ac01abf76b9ba60060abccb7a3fe686f55e5b6768b20009a12522bd0d9">Integer::PRIME</a>);
<a name="l00098"></a>00098 
<a name="l00099"></a>00099         <span class="keywordflow">if</span> (param.<a class="code" href="class_name_value_pairs.html#96686e9f8d6ce3ab870e516fb72b608e" title="get a named value, returns true if the name exists">GetValue</a>(<span class="stringliteral">"Seed"</span>, seedParam))
<a name="l00100"></a>00100         {
<a name="l00101"></a>00101                 seed.<a class="code" href="class_sec_block.html#f9e98d3f4a7af1156fcf3e6e68f4ae5a" title="change size and preserve contents">resize</a>(seedParam.<a class="code" href="class_const_byte_array_parameter.html#b83dbf7e4d80c0304917a3cc1d3cf144">size</a>() + 4);
<a name="l00102"></a>00102                 memcpy(seed + 4, seedParam.<a class="code" href="class_const_byte_array_parameter.html#b89acc8dae383f2663dd3864651e8ef1">begin</a>(), seedParam.<a class="code" href="class_const_byte_array_parameter.html#b83dbf7e4d80c0304917a3cc1d3cf144">size</a>());
<a name="l00103"></a>00103 
<a name="l00104"></a>00104                 PutWord(<span class="keyword">false</span>, <a class="code" href="cryptlib_8h.html#aeb92d42f5a6e27b8ba19f18d69d142bf0c3bb6c718cc7ff0bffef4e8f178c57">BIG_ENDIAN_ORDER</a>, seed, (word32)0);
<a name="l00105"></a>00105                 <a class="code" href="class_invertible_e_s_i_g_n_function.html#d743ae7fe10fbff6c9dddd88e76fc7fd">m_p</a>.<a class="code" href="class_integer.html#0d9a427fe64a454b11b24fe61c10dbeb">GenerateRandom</a>(rng, <a class="code" href="class_combined_name_value_pairs.html">CombinedNameValuePairs</a>(primeParam, MakeParameters(<span class="stringliteral">"Seed"</span>, <a class="code" href="class_const_byte_array_parameter.html" title="used to pass byte array input as part of a NameValuePairs object">ConstByteArrayParameter</a>(seed))));
<a name="l00106"></a>00106                 PutWord(<span class="keyword">false</span>, <a class="code" href="cryptlib_8h.html#aeb92d42f5a6e27b8ba19f18d69d142bf0c3bb6c718cc7ff0bffef4e8f178c57">BIG_ENDIAN_ORDER</a>, seed, (word32)1);
<a name="l00107"></a>00107                 <a class="code" href="class_invertible_e_s_i_g_n_function.html#dc2b3dc52e2421e408f0e1bb607da135">m_q</a>.<a class="code" href="class_integer.html#0d9a427fe64a454b11b24fe61c10dbeb">GenerateRandom</a>(rng, <a class="code" href="class_combined_name_value_pairs.html">CombinedNameValuePairs</a>(primeParam, MakeParameters(<span class="stringliteral">"Seed"</span>, <a class="code" href="class_const_byte_array_parameter.html" title="used to pass byte array input as part of a NameValuePairs object">ConstByteArrayParameter</a>(seed))));
<a name="l00108"></a>00108         }
<a name="l00109"></a>00109         <span class="keywordflow">else</span>
<a name="l00110"></a>00110         {
<a name="l00111"></a>00111                 <a class="code" href="class_invertible_e_s_i_g_n_function.html#d743ae7fe10fbff6c9dddd88e76fc7fd">m_p</a>.<a class="code" href="class_integer.html#0d9a427fe64a454b11b24fe61c10dbeb">GenerateRandom</a>(rng, primeParam);
<a name="l00112"></a>00112                 <a class="code" href="class_invertible_e_s_i_g_n_function.html#dc2b3dc52e2421e408f0e1bb607da135">m_q</a>.<a class="code" href="class_integer.html#0d9a427fe64a454b11b24fe61c10dbeb">GenerateRandom</a>(rng, primeParam);
<a name="l00113"></a>00113         }
<a name="l00114"></a>00114 
<a name="l00115"></a>00115         <a class="code" href="class_e_s_i_g_n_function.html#74695389e40c412ff0a1e34ebb797678">m_n</a> = <a class="code" href="class_invertible_e_s_i_g_n_function.html#d743ae7fe10fbff6c9dddd88e76fc7fd">m_p</a> * <a class="code" href="class_invertible_e_s_i_g_n_function.html#d743ae7fe10fbff6c9dddd88e76fc7fd">m_p</a> * <a class="code" href="class_invertible_e_s_i_g_n_function.html#dc2b3dc52e2421e408f0e1bb607da135">m_q</a>;
<a name="l00116"></a>00116 
<a name="l00117"></a>00117         assert(<a class="code" href="class_e_s_i_g_n_function.html#74695389e40c412ff0a1e34ebb797678">m_n</a>.<a class="code" href="class_integer.html#867356d88074424328d0ebb9bea63254" title="number of significant bits = floor(log2(abs(*this))) + 1">BitCount</a>() == modulusSize);
<a name="l00118"></a>00118 }
<a name="l00119"></a>00119 
<a name="l00120"></a><a class="code" href="class_invertible_e_s_i_g_n_function.html#7e63d8fe66a25af6611f37bdaac982c4">00120</a> <span class="keywordtype">void</span> <a class="code" href="class_invertible_e_s_i_g_n_function.html#7e63d8fe66a25af6611f37bdaac982c4" title="decode this object from a BufferedTransformation, using BER (Basic Encoding Rules)...">InvertibleESIGNFunction::BERDecode</a>(<a class="code" href="class_buffered_transformation.html" title="interface for buffered transformations">BufferedTransformation</a> &amp;bt)
<a name="l00121"></a>00121 {
<a name="l00122"></a>00122         <a class="code" href="class_b_e_r_sequence_decoder.html" title="BER Sequence Decoder.">BERSequenceDecoder</a> privateKey(bt);
<a name="l00123"></a>00123                 <a class="code" href="class_e_s_i_g_n_function.html#74695389e40c412ff0a1e34ebb797678">m_n</a>.<a class="code" href="class_integer.html#810fc0382f8928893fe192ab79b1972c">BERDecode</a>(privateKey);
<a name="l00124"></a>00124                 <a class="code" href="class_e_s_i_g_n_function.html#086e17e8047753768b22c6b59faebf60">m_e</a>.<a class="code" href="class_integer.html#810fc0382f8928893fe192ab79b1972c">BERDecode</a>(privateKey);
<a name="l00125"></a>00125                 <a class="code" href="class_invertible_e_s_i_g_n_function.html#d743ae7fe10fbff6c9dddd88e76fc7fd">m_p</a>.<a class="code" href="class_integer.html#810fc0382f8928893fe192ab79b1972c">BERDecode</a>(privateKey);
<a name="l00126"></a>00126                 <a class="code" href="class_invertible_e_s_i_g_n_function.html#dc2b3dc52e2421e408f0e1bb607da135">m_q</a>.<a class="code" href="class_integer.html#810fc0382f8928893fe192ab79b1972c">BERDecode</a>(privateKey);
<a name="l00127"></a>00127         privateKey.<a class="code" href="class_b_e_r_general_decoder.html#40b14625c98ac7febb8ca218d02358ad">MessageEnd</a>();
<a name="l00128"></a>00128 }
<a name="l00129"></a>00129 
<a name="l00130"></a><a class="code" href="class_invertible_e_s_i_g_n_function.html#7c12cab3cb37c52da87672ef1bc33f13">00130</a> <span class="keywordtype">void</span> <a class="code" href="class_invertible_e_s_i_g_n_function.html#7c12cab3cb37c52da87672ef1bc33f13" title="encode this object into a BufferedTransformation, using DER (Distinguished Encoding...">InvertibleESIGNFunction::DEREncode</a>(<a class="code" href="class_buffered_transformation.html" title="interface for buffered transformations">BufferedTransformation</a> &amp;bt)<span class="keyword"> const</span>
<a name="l00131"></a>00131 <span class="keyword"></span>{
<a name="l00132"></a>00132         <a class="code" href="class_d_e_r_sequence_encoder.html" title="DER Sequence Encoder.">DERSequenceEncoder</a> privateKey(bt);
<a name="l00133"></a>00133                 <a class="code" href="class_e_s_i_g_n_function.html#74695389e40c412ff0a1e34ebb797678">m_n</a>.<a class="code" href="class_integer.html#6ab51a05bee88cfa690179611e8a084e" title="encode using Distinguished Encoding Rules, put result into a BufferedTransformation...">DEREncode</a>(privateKey);
<a name="l00134"></a>00134                 <a class="code" href="class_e_s_i_g_n_function.html#086e17e8047753768b22c6b59faebf60">m_e</a>.<a class="code" href="class_integer.html#6ab51a05bee88cfa690179611e8a084e" title="encode using Distinguished Encoding Rules, put result into a BufferedTransformation...">DEREncode</a>(privateKey);
<a name="l00135"></a>00135                 <a class="code" href="class_invertible_e_s_i_g_n_function.html#d743ae7fe10fbff6c9dddd88e76fc7fd">m_p</a>.<a class="code" href="class_integer.html#6ab51a05bee88cfa690179611e8a084e" title="encode using Distinguished Encoding Rules, put result into a BufferedTransformation...">DEREncode</a>(privateKey);
<a name="l00136"></a>00136                 <a class="code" href="class_invertible_e_s_i_g_n_function.html#dc2b3dc52e2421e408f0e1bb607da135">m_q</a>.<a class="code" href="class_integer.html#6ab51a05bee88cfa690179611e8a084e" title="encode using Distinguished Encoding Rules, put result into a BufferedTransformation...">DEREncode</a>(privateKey);
<a name="l00137"></a>00137         privateKey.<a class="code" href="class_d_e_r_general_encoder.html#cb5f1a94ba97027c603b019bd5228510">MessageEnd</a>();