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来自「Crypto++是一个非常强大的密码学库,主要是功能全」· HTML 代码 · 共 176 行 · 第 1/2 页

00082 <span class="comment">//! .</span>
<a name="l00083"></a><a class="code" href="class_e_m_s_a2_pad.html">00083</a> <span class="comment"></span><span class="keyword">class </span><a class="code" href="class_e_m_s_a2_pad.html">EMSA2Pad</a> : <span class="keyword">public</span> <a class="code" href="class_p_k___padding_algorithm.html">PK_PaddingAlgorithm</a>
00084 {
00085 <span class="keyword">public</span>:
00086         <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">char</span> *StaticAlgorithmName() {<span class="keywordflow">return</span> <span class="stringliteral">"EMSA2"</span>;}
00087         
00088         <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> MaxUnpaddedLength(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> paddedLength)<span class="keyword"> const </span>{<span class="keywordflow">return</span> (paddedLength+1)/8-2;}
00089 
00090         <span class="keywordtype">void</span> Pad(<a class="code" href="class_random_number_generator.html">RandomNumberGenerator</a> &amp;rng, <span class="keyword">const</span> byte *raw, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> inputLength, byte *padded, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> paddedLength) <span class="keyword">const</span>;
00091         <a class="code" href="struct_decoding_result.html">DecodingResult</a> Unpad(<span class="keyword">const</span> byte *padded, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> paddedLength, byte *raw) <span class="keyword">const</span>;
00092 };
00093 <span class="comment"></span>
00094 <span class="comment">//! .</span>
00095 <span class="comment"></span><span class="keyword">template</span> &lt;<span class="keyword">class</span> H&gt;
<a name="l00096"></a><a class="code" href="class_e_m_s_a2_decorated_hash_module.html">00096</a> <span class="keyword">class </span><a class="code" href="class_e_m_s_a2_decorated_hash_module.html">EMSA2DecoratedHashModule</a> : <span class="keyword">public</span> HashTransformationWithDefaultTruncation
00097 {
00098 <span class="keyword">public</span>:
00099         <a class="code" href="class_e_m_s_a2_decorated_hash_module.html">EMSA2DecoratedHashModule</a>() : empty(<span class="keyword">true</span>) {}
<a name="l00100"></a><a class="code" href="class_e_m_s_a2_decorated_hash_module.html#_e_m_s_a2_decorated_hash_modulea1">00100</a>         <span class="keywordtype">void</span> <a class="code" href="class_e_m_s_a2_decorated_hash_module.html#_e_m_s_a2_decorated_hash_modulea1">Update</a>(<span class="keyword">const</span> byte *input, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> length)
00101                 {h.Update(input, length); empty = empty &amp;&amp; length==0;}
00102         <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="class_e_m_s_a2_decorated_hash_module.html#_e_m_s_a2_decorated_hash_modulea2">DigestSize</a>() <span class="keyword">const</span>;
00103         <span class="keywordtype">void</span> <a class="code" href="class_e_m_s_a2_decorated_hash_module.html#_e_m_s_a2_decorated_hash_modulea3">Final</a>(byte *digest);
<a name="l00104"></a><a class="code" href="class_e_m_s_a2_decorated_hash_module.html#_e_m_s_a2_decorated_hash_modulea4">00104</a>         <span class="keywordtype">void</span> <a class="code" href="class_e_m_s_a2_decorated_hash_module.html#_e_m_s_a2_decorated_hash_modulea4">Restart</a>() {h.Restart(); empty=<span class="keyword">true</span>;}
00105 
00106 <span class="keyword">private</span>:
00107         H h;
00108         <span class="keywordtype">bool</span> empty;
00109 };
00110 
00111 <span class="keyword">template</span> &lt;<span class="keyword">class</span> H&gt; <span class="keyword">struct </span>EMSA2DigestDecoration
00112 {
00113         <span class="keyword">static</span> <span class="keyword">const</span> byte decoration;
00114 };
00115 <span class="comment"></span>
00116 <span class="comment">//! EMSA2, for use with RW</span>
00117 <span class="comment"></span><span class="comment">/*! The following hash functions are supported: SHA, RIPEMD160. */</span>
<a name="l00118"></a><a class="code" href="struct_p1363___e_m_s_a2.html">00118</a> <span class="keyword">struct </span><a class="code" href="struct_p1363___e_m_s_a2.html">P1363_EMSA2</a> : <span class="keyword">public</span> <a class="code" href="struct_signature_standard.html">SignatureStandard</a>
00119 {
00120         <span class="keyword">template</span> &lt;<span class="keyword">class</span> H&gt; <span class="keyword">struct </span>SignaturePaddingAlgorithm {<span class="keyword">typedef</span> <a class="code" href="class_e_m_s_a2_pad.html">EMSA2Pad</a> <a class="code" href="class_e_m_s_a2_decorated_hash_module.html">type</a>;};
00121         <span class="keyword">template</span> &lt;<span class="keyword">class</span> H&gt; <span class="keyword">struct </span>DecoratedHashingAlgorithm {<span class="keyword">typedef</span> <a class="code" href="class_e_m_s_a2_decorated_hash_module.html">EMSA2DecoratedHashModule&lt;H&gt;</a> <a class="code" href="class_e_m_s_a2_decorated_hash_module.html">type</a>;};
00122 };
00123 
00124 <span class="keyword">template</span>&lt;&gt; <span class="keyword">struct </span>CryptoStandardTraits&lt;P1363_EMSA2&gt; : <span class="keyword">public</span> P1363_EMSA2 {};
00125 
00126 <span class="comment">// EMSA2DecoratedHashModule can be instantiated with the following two classes.</span>
00127 <span class="keyword">class </span><a class="code" href="class_s_h_a.html">SHA</a>;
00128 <span class="keyword">class </span><a class="code" href="class_r_i_p_e_m_d160.html">RIPEMD160</a>;
00129 
00130 <span class="keyword">template</span> &lt;<span class="keyword">class</span> H&gt;
<a name="l00131"></a><a class="code" href="class_e_m_s_a2_decorated_hash_module.html#_e_m_s_a2_decorated_hash_modulea3">00131</a> <span class="keywordtype">void</span> <a class="code" href="class_e_m_s_a2_decorated_hash_module.html#_e_m_s_a2_decorated_hash_modulea3">EMSA2DecoratedHashModule&lt;H&gt;::Final</a>(byte *digest)
00132 {
00133         digest[0] = empty ? 0x4b : 0x6b;
00134         h.Final(digest+1);
00135         digest[<a class="code" href="class_e_m_s_a2_decorated_hash_module.html#_e_m_s_a2_decorated_hash_modulea2">DigestSize</a>()-1] = EMSA2DigestDecoration&lt;H&gt;::decoration;
00136         empty=<span class="keyword">true</span>;
00137 }
00138 
00139 <span class="keyword">template</span> &lt;<span class="keyword">class</span> H&gt;
<a name="l00140"></a><a class="code" href="class_e_m_s_a2_decorated_hash_module.html#_e_m_s_a2_decorated_hash_modulea2">00140</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="class_e_m_s_a2_decorated_hash_module.html#_e_m_s_a2_decorated_hash_modulea2">EMSA2DecoratedHashModule&lt;H&gt;::DigestSize</a>()<span class="keyword"> const</span>
00141 <span class="keyword"></span>{
00142         <span class="keywordflow">return</span> h.DigestSize() + 2;
00143 }
00144 <span class="comment"></span>
00145 <span class="comment">//! .</span>
00146 <span class="comment"></span><span class="keyword">template</span> &lt;word r&gt;
<a name="l00147"></a><a class="code" href="struct_r_w.html">00147</a> <span class="keyword">struct </span><a class="code" href="struct_r_w.html">RW</a>
00148 {
00149         <span class="keyword">static</span> std::string StaticAlgorithmName() {<span class="keywordflow">return</span> <span class="stringliteral">"RW"</span>;}
00150         <span class="keyword">typedef</span> <a class="code" href="class_r_w_function.html">RWFunction&lt;r&gt;</a> <a class="code" href="class_r_w_function.html">PublicKey</a>;
00151         <span class="keyword">typedef</span> <a class="code" href="class_invertible_r_w_function.html">InvertibleRWFunction&lt;r&gt;</a> <a class="code" href="class_invertible_r_w_function.html">PrivateKey</a>;
00152 };
00153 <span class="comment"></span>
00154 <span class="comment">//! RW</span>
<a name="l00155"></a><a class="code" href="struct_r_w_s_s_a.html">00155</a> <span class="comment"></span><span class="keyword">template</span> &lt;<span class="keyword">class</span> H, <span class="keyword">class</span> STANDARD = P1363_EMSA2&gt;
00156 <span class="keyword">struct </span><a class="code" href="struct_r_w_s_s_a.html">RWSSA</a> : <span class="keyword">public</span> <a class="code" href="class_t_f___s_s_a.html">TF_SSA</a>&lt;STANDARD, H, RW&lt;IFSSA_R&gt; &gt;
00157 {
00158 };
00159 
00160 NAMESPACE_END
00161 
00162 <span class="preprocessor">#endif</span>
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