skipjack_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="l00095"></a>00095 
<a name="l00096"></a>00096 <span class="keyword">typedef</span> <a class="code" href="struct_block_get_and_put.html">BlockGetAndPut&lt;word16, LittleEndian&gt;</a> <a class="code" href="struct_block_get_and_put.html">Block</a>;
<a name="l00097"></a>00097 <span class="comment"></span>
<a name="l00098"></a>00098 <span class="comment">/**</span>
<a name="l00099"></a>00099 <span class="comment"> * Encrypt a single block of data.</span>
<a name="l00100"></a>00100 <span class="comment"> */</span>
<a name="l00101"></a>00101 <span class="keywordtype">void</span> SKIPJACK::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="l00102"></a>00102 <span class="keyword"></span>{
<a name="l00103"></a>00103         word16 w1, w2, w3, w4;
<a name="l00104"></a>00104         <a class="code" href="struct_block_get_and_put.html#07781cc0817613fe47e8070999cf4b95">Block::Get</a>(inBlock)(w4)(w3)(w2)(w1);
<a name="l00105"></a>00105 
<a name="l00106"></a>00106         <span class="comment">/* stepping rule A: */</span>
<a name="l00107"></a>00107         g0(tab, w1); w4 ^= w1 ^ 1;
<a name="l00108"></a>00108         g1(tab, w4); w3 ^= w4 ^ 2;
<a name="l00109"></a>00109         g2(tab, w3); w2 ^= w3 ^ 3;
<a name="l00110"></a>00110         g3(tab, w2); w1 ^= w2 ^ 4;
<a name="l00111"></a>00111         g4(tab, w1); w4 ^= w1 ^ 5;
<a name="l00112"></a>00112         g0(tab, w4); w3 ^= w4 ^ 6;
<a name="l00113"></a>00113         g1(tab, w3); w2 ^= w3 ^ 7;
<a name="l00114"></a>00114         g2(tab, w2); w1 ^= w2 ^ 8;
<a name="l00115"></a>00115 
<a name="l00116"></a>00116         <span class="comment">/* stepping rule B: */</span>
<a name="l00117"></a>00117         w2 ^= w1 ^  9; g3(tab, w1);
<a name="l00118"></a>00118         w1 ^= w4 ^ 10; g4(tab, w4);
<a name="l00119"></a>00119         w4 ^= w3 ^ 11; g0(tab, w3);
<a name="l00120"></a>00120         w3 ^= w2 ^ 12; g1(tab, w2);
<a name="l00121"></a>00121         w2 ^= w1 ^ 13; g2(tab, w1);
<a name="l00122"></a>00122         w1 ^= w4 ^ 14; g3(tab, w4);
<a name="l00123"></a>00123         w4 ^= w3 ^ 15; g4(tab, w3);
<a name="l00124"></a>00124         w3 ^= w2 ^ 16; g0(tab, w2);
<a name="l00125"></a>00125 
<a name="l00126"></a>00126         <span class="comment">/* stepping rule A: */</span>
<a name="l00127"></a>00127         g1(tab, w1); w4 ^= w1 ^ 17;
<a name="l00128"></a>00128         g2(tab, w4); w3 ^= w4 ^ 18;
<a name="l00129"></a>00129         g3(tab, w3); w2 ^= w3 ^ 19;
<a name="l00130"></a>00130         g4(tab, w2); w1 ^= w2 ^ 20;
<a name="l00131"></a>00131         g0(tab, w1); w4 ^= w1 ^ 21;
<a name="l00132"></a>00132         g1(tab, w4); w3 ^= w4 ^ 22;
<a name="l00133"></a>00133         g2(tab, w3); w2 ^= w3 ^ 23;
<a name="l00134"></a>00134         g3(tab, w2); w1 ^= w2 ^ 24;
<a name="l00135"></a>00135 
<a name="l00136"></a>00136         <span class="comment">/* stepping rule B: */</span>
<a name="l00137"></a>00137         w2 ^= w1 ^ 25; g4(tab, w1);
<a name="l00138"></a>00138         w1 ^= w4 ^ 26; g0(tab, w4);
<a name="l00139"></a>00139         w4 ^= w3 ^ 27; g1(tab, w3);
<a name="l00140"></a>00140         w3 ^= w2 ^ 28; g2(tab, w2);
<a name="l00141"></a>00141         w2 ^= w1 ^ 29; g3(tab, w1);
<a name="l00142"></a>00142         w1 ^= w4 ^ 30; g4(tab, w4);
<a name="l00143"></a>00143         w4 ^= w3 ^ 31; g0(tab, w3);
<a name="l00144"></a>00144         w3 ^= w2 ^ 32; g1(tab, w2);
<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)(w4)(w3)(w2)(w1);
<a name="l00147"></a>00147 }
<a name="l00148"></a>00148 <span class="comment"></span>
<a name="l00149"></a>00149 <span class="comment">/**</span>
<a name="l00150"></a>00150 <span class="comment"> * Decrypt a single block of data.</span>
<a name="l00151"></a>00151 <span class="comment"> */</span>
<a name="l00152"></a>00152 <span class="keywordtype">void</span> SKIPJACK::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="l00153"></a>00153 <span class="keyword"></span>{
<a name="l00154"></a>00154         word16 w1, w2, w3, w4;
<a name="l00155"></a>00155         <a class="code" href="struct_block_get_and_put.html#07781cc0817613fe47e8070999cf4b95">Block::Get</a>(inBlock)(w4)(w3)(w2)(w1);
<a name="l00156"></a>00156 
<a name="l00157"></a>00157         <span class="comment">/* stepping rule A: */</span>
<a name="l00158"></a>00158         h1(tab, w2); w3 ^= w2 ^ 32;
<a name="l00159"></a>00159         h0(tab, w3); w4 ^= w3 ^ 31;
<a name="l00160"></a>00160         h4(tab, w4); w1 ^= w4 ^ 30;
<a name="l00161"></a>00161         h3(tab, w1); w2 ^= w1 ^ 29;
<a name="l00162"></a>00162         h2(tab, w2); w3 ^= w2 ^ 28;
<a name="l00163"></a>00163         h1(tab, w3); w4 ^= w3 ^ 27;
<a name="l00164"></a>00164         h0(tab, w4); w1 ^= w4 ^ 26;
<a name="l00165"></a>00165         h4(tab, w1); w2 ^= w1 ^ 25;
<a name="l00166"></a>00166 
<a name="l00167"></a>00167         <span class="comment">/* stepping rule B: */</span>
<a name="l00168"></a>00168         w1 ^= w2 ^ 24; h3(tab, w2);
<a name="l00169"></a>00169         w2 ^= w3 ^ 23; h2(tab, w3);
<a name="l00170"></a>00170         w3 ^= w4 ^ 22; h1(tab, w4);
<a name="l00171"></a>00171         w4 ^= w1 ^ 21; h0(tab, w1);
<a name="l00172"></a>00172         w1 ^= w2 ^ 20; h4(tab, w2);
<a name="l00173"></a>00173         w2 ^= w3 ^ 19; h3(tab, w3);
<a name="l00174"></a>00174         w3 ^= w4 ^ 18; h2(tab, w4);
<a name="l00175"></a>00175         w4 ^= w1 ^ 17; h1(tab, w1);
<a name="l00176"></a>00176 
<a name="l00177"></a>00177         <span class="comment">/* stepping rule A: */</span>
<a name="l00178"></a>00178         h0(tab, w2); w3 ^= w2 ^ 16;
<a name="l00179"></a>00179         h4(tab, w3); w4 ^= w3 ^ 15;
<a name="l00180"></a>00180         h3(tab, w4); w1 ^= w4 ^ 14;
<a name="l00181"></a>00181         h2(tab, w1); w2 ^= w1 ^ 13;
<a name="l00182"></a>00182         h1(tab, w2); w3 ^= w2 ^ 12;
<a name="l00183"></a>00183         h0(tab, w3); w4 ^= w3 ^ 11;
<a name="l00184"></a>00184         h4(tab, w4); w1 ^= w4 ^ 10;
<a name="l00185"></a>00185         h3(tab, w1); w2 ^= w1 ^  9;
<a name="l00186"></a>00186 
<a name="l00187"></a>00187         <span class="comment">/* stepping rule B: */</span>
<a name="l00188"></a>00188         w1 ^= w2 ^ 8; h2(tab, w2);
<a name="l00189"></a>00189         w2 ^= w3 ^ 7; h1(tab, w3);
<a name="l00190"></a>00190         w3 ^= w4 ^ 6; h0(tab, w4);
<a name="l00191"></a>00191         w4 ^= w1 ^ 5; h4(tab, w1);
<a name="l00192"></a>00192         w1 ^= w2 ^ 4; h3(tab, w2);
<a name="l00193"></a>00193         w2 ^= w3 ^ 3; h2(tab, w3);
<a name="l00194"></a>00194         w3 ^= w4 ^ 2; h1(tab, w4);
<a name="l00195"></a>00195         w4 ^= w1 ^ 1; h0(tab, w1);
<a name="l00196"></a>00196 
<a name="l00197"></a>00197         <a class="code" href="struct_block_get_and_put.html#63d96a17e8118407e02896d0b0f8d92d">Block::Put</a>(xorBlock, outBlock)(w4)(w3)(w2)(w1);
<a name="l00198"></a>00198 }
<a name="l00199"></a>00199 
<a name="l00200"></a>00200 NAMESPACE_END
<a name="l00201"></a>00201 
<a name="l00202"></a>00202 <span class="preprocessor">#endif</span>
</pre></div><hr size="1"><address style="text-align: right;"><small>Generated on Fri Jun 1 11:11:24 2007 for Crypto++ by&nbsp;
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