square_8cpp-source.html

著名的密码库Crypto++的文档 C++语言的杰作。程序员必备。

<a name="l00081"></a>00081 <span class="preprocessor">        temp[1] = T0[SSB (text[0])] \</span>
<a name="l00082"></a>00082 <span class="preprocessor">                        ^ T1[SSB (text[1])] \</span>
<a name="l00083"></a>00083 <span class="preprocessor">                        ^ T2[SSB (text[2])] \</span>
<a name="l00084"></a>00084 <span class="preprocessor">                        ^ T3[SSB (text[3])] \</span>
<a name="l00085"></a>00085 <span class="preprocessor">                        ^ roundkey[1]; \</span>
<a name="l00086"></a>00086 <span class="preprocessor">        temp[2] = T0[TSB (text[0])] \</span>
<a name="l00087"></a>00087 <span class="preprocessor">                        ^ T1[TSB (text[1])] \</span>
<a name="l00088"></a>00088 <span class="preprocessor">                        ^ T2[TSB (text[2])] \</span>
<a name="l00089"></a>00089 <span class="preprocessor">                        ^ T3[TSB (text[3])] \</span>
<a name="l00090"></a>00090 <span class="preprocessor">                        ^ roundkey[2]; \</span>
<a name="l00091"></a>00091 <span class="preprocessor">        temp[3] = T0[LSB (text[0])] \</span>
<a name="l00092"></a>00092 <span class="preprocessor">                        ^ T1[LSB (text[1])] \</span>
<a name="l00093"></a>00093 <span class="preprocessor">                        ^ T2[LSB (text[2])] \</span>
<a name="l00094"></a>00094 <span class="preprocessor">                        ^ T3[LSB (text[3])] \</span>
<a name="l00095"></a>00095 <span class="preprocessor">                        ^ roundkey[3]; \</span>
<a name="l00096"></a>00096 <span class="preprocessor">} </span><span class="comment">/* squareRound */</span>
<a name="l00097"></a>00097 
<a name="l00098"></a>00098 <span class="preprocessor">#define squareFinal(text, temp, S, roundkey) \</span>
<a name="l00099"></a>00099 <span class="preprocessor">{ \</span>
<a name="l00100"></a>00100 <span class="preprocessor">        text[0] = ((word32) (S[MSB (temp[0])]) &lt;&lt; 24) \</span>
<a name="l00101"></a>00101 <span class="preprocessor">                        ^ ((word32) (S[MSB (temp[1])]) &lt;&lt; 16) \</span>
<a name="l00102"></a>00102 <span class="preprocessor">                        ^ ((word32) (S[MSB (temp[2])]) &lt;&lt;  8) \</span>
<a name="l00103"></a>00103 <span class="preprocessor">                        ^  (word32) (S[MSB (temp[3])]) \</span>
<a name="l00104"></a>00104 <span class="preprocessor">                        ^ roundkey[0]; \</span>
<a name="l00105"></a>00105 <span class="preprocessor">        text[1] = ((word32) (S[SSB (temp[0])]) &lt;&lt; 24) \</span>
<a name="l00106"></a>00106 <span class="preprocessor">                        ^ ((word32) (S[SSB (temp[1])]) &lt;&lt; 16) \</span>
<a name="l00107"></a>00107 <span class="preprocessor">                        ^ ((word32) (S[SSB (temp[2])]) &lt;&lt;  8) \</span>
<a name="l00108"></a>00108 <span class="preprocessor">                        ^  (word32) (S[SSB (temp[3])]) \</span>
<a name="l00109"></a>00109 <span class="preprocessor">                        ^ roundkey[1]; \</span>
<a name="l00110"></a>00110 <span class="preprocessor">        text[2] = ((word32) (S[TSB (temp[0])]) &lt;&lt; 24) \</span>
<a name="l00111"></a>00111 <span class="preprocessor">                        ^ ((word32) (S[TSB (temp[1])]) &lt;&lt; 16) \</span>
<a name="l00112"></a>00112 <span class="preprocessor">                        ^ ((word32) (S[TSB (temp[2])]) &lt;&lt;  8) \</span>
<a name="l00113"></a>00113 <span class="preprocessor">                        ^  (word32) (S[TSB (temp[3])]) \</span>
<a name="l00114"></a>00114 <span class="preprocessor">                        ^ roundkey[2]; \</span>
<a name="l00115"></a>00115 <span class="preprocessor">        text[3] = ((word32) (S[LSB (temp[0])]) &lt;&lt; 24) \</span>
<a name="l00116"></a>00116 <span class="preprocessor">                        ^ ((word32) (S[LSB (temp[1])]) &lt;&lt; 16) \</span>
<a name="l00117"></a>00117 <span class="preprocessor">                        ^ ((word32) (S[LSB (temp[2])]) &lt;&lt;  8) \</span>
<a name="l00118"></a>00118 <span class="preprocessor">                        ^  (word32) (S[LSB (temp[3])]) \</span>
<a name="l00119"></a>00119 <span class="preprocessor">                        ^ roundkey[3]; \</span>
<a name="l00120"></a>00120 <span class="preprocessor">} </span><span class="comment">/* squareFinal */</span>
<a name="l00121"></a>00121 
<a name="l00122"></a>00122 <span class="keyword">typedef</span> <a class="code" href="struct_block_get_and_put.html">BlockGetAndPut&lt;word32, BigEndian&gt;</a> <a class="code" href="struct_block_get_and_put.html">Block</a>;
<a name="l00123"></a>00123 
<a name="l00124"></a>00124 <span class="keywordtype">void</span> Square::Enc::ProcessAndXorBlock(<span class="keyword">const</span> byte *inBlock, <span class="keyword">const</span> byte *xorBlock, byte *outBlock)<span class="keyword"> const</span>
<a name="l00125"></a>00125 <span class="keyword"></span>{
<a name="l00126"></a>00126         word32 text[4], temp[4];
<a name="l00127"></a>00127         <a class="code" href="struct_block_get_and_put.html#07781cc0817613fe47e8070999cf4b95">Block::Get</a>(inBlock)(text[0])(text[1])(text[2])(text[3]);
<a name="l00128"></a>00128    
<a name="l00129"></a>00129         <span class="comment">/* initial key addition */</span>
<a name="l00130"></a>00130         text[0] ^= roundkeys[0][0];
<a name="l00131"></a>00131         text[1] ^= roundkeys[0][1];
<a name="l00132"></a>00132         text[2] ^= roundkeys[0][2];
<a name="l00133"></a>00133         text[3] ^= roundkeys[0][3];
<a name="l00134"></a>00134  
<a name="l00135"></a>00135         <span class="comment">/* ROUNDS - 1 full rounds */</span>
<a name="l00136"></a>00136         <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i=1; i+1&lt;ROUNDS; i+=2)
<a name="l00137"></a>00137         {
<a name="l00138"></a>00138                 squareRound (text, temp, Te[0], Te[1], Te[2], Te[3], roundkeys[i]);
<a name="l00139"></a>00139                 squareRound (temp, text, Te[0], Te[1], Te[2], Te[3], roundkeys[i+1]);
<a name="l00140"></a>00140         }
<a name="l00141"></a>00141         squareRound (text, temp, Te[0], Te[1], Te[2], Te[3], roundkeys[ROUNDS-1]);
<a name="l00142"></a>00142 
<a name="l00143"></a>00143         <span class="comment">/* last round (diffusion becomes only transposition) */</span>
<a name="l00144"></a>00144         squareFinal (text, temp, Se, roundkeys[ROUNDS]);
<a name="l00145"></a>00145 
<a name="l00146"></a>00146         <a class="code" href="struct_block_get_and_put.html#63d96a17e8118407e02896d0b0f8d92d">Block::Put</a>(xorBlock, outBlock)(text[0])(text[1])(text[2])(text[3]);
<a name="l00147"></a>00147 }
<a name="l00148"></a>00148 
<a name="l00149"></a>00149 <span class="keywordtype">void</span> Square::Dec::ProcessAndXorBlock(<span class="keyword">const</span> byte *inBlock, <span class="keyword">const</span> byte *xorBlock, byte *outBlock)<span class="keyword"> const</span>
<a name="l00150"></a>00150 <span class="keyword"></span>{
<a name="l00151"></a>00151         word32 text[4], temp[4];
<a name="l00152"></a>00152         <a class="code" href="struct_block_get_and_put.html#07781cc0817613fe47e8070999cf4b95">Block::Get</a>(inBlock)(text[0])(text[1])(text[2])(text[3]);
<a name="l00153"></a>00153    
<a name="l00154"></a>00154         <span class="comment">/* initial key addition */</span>
<a name="l00155"></a>00155         text[0] ^= roundkeys[0][0];
<a name="l00156"></a>00156         text[1] ^= roundkeys[0][1];
<a name="l00157"></a>00157         text[2] ^= roundkeys[0][2];
<a name="l00158"></a>00158         text[3] ^= roundkeys[0][3];
<a name="l00159"></a>00159  
<a name="l00160"></a>00160         <span class="comment">/* ROUNDS - 1 full rounds */</span>
<a name="l00161"></a>00161         <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i=1; i+1&lt;ROUNDS; i+=2)
<a name="l00162"></a>00162         {
<a name="l00163"></a>00163                 squareRound (text, temp, Td[0], Td[1], Td[2], Td[3], roundkeys[i]);
<a name="l00164"></a>00164                 squareRound (temp, text, Td[0], Td[1], Td[2], Td[3], roundkeys[i+1]);
<a name="l00165"></a>00165         }
<a name="l00166"></a>00166         squareRound (text, temp, Td[0], Td[1], Td[2], Td[3], roundkeys[ROUNDS-1]);
<a name="l00167"></a>00167 
<a name="l00168"></a>00168         <span class="comment">/* last round (diffusion becomes only transposition) */</span>
<a name="l00169"></a>00169         squareFinal (text, temp, Sd, roundkeys[ROUNDS]);
<a name="l00170"></a>00170 
<a name="l00171"></a>00171         <a class="code" href="struct_block_get_and_put.html#63d96a17e8118407e02896d0b0f8d92d">Block::Put</a>(xorBlock, outBlock)(text[0])(text[1])(text[2])(text[3]);
<a name="l00172"></a>00172 }
<a name="l00173"></a>00173 
<a name="l00174"></a>00174 NAMESPACE_END
</pre></div><hr size="1"><address style="text-align: right;"><small>Generated on Fri Jun 1 11:11:25 2007 for Crypto++ by&nbsp;
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