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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="l00142"></a>00142                 K[i+13] = S[4][x(0xA)] ^ S[5][x(0xB)] ^ S[6][x(0x5)] ^ S[7][x(0x4)] ^ S[5][x(0x7)];
<a name="l00143"></a>00143                 K[i+14] = S[4][x(0xC)] ^ S[5][x(0xD)] ^ S[6][x(0x3)] ^ S[7][x(0x2)] ^ S[6][x(0x8)];
<a name="l00144"></a>00144                 K[i+15] = S[4][x(0xE)] ^ S[5][x(0xF)] ^ S[6][x(0x1)] ^ S[7][x(0x0)] ^ S[7][x(0xD)];
<a name="l00145"></a>00145         }
<a name="l00146"></a>00146 
<a name="l00147"></a>00147         <span class="keywordflow">for</span> (i=16; i&lt;32; i++)
<a name="l00148"></a>00148                 K[i] &amp;= 0x1f;
<a name="l00149"></a>00149 }
<a name="l00150"></a>00150 
<a name="l00151"></a>00151 <span class="comment">// The following CAST-256 implementation was contributed by Leonard Janke</span>
<a name="l00152"></a>00152 
<a name="l00153"></a>00153 <span class="keyword">const</span> word32 CAST256::Base::t_m[8][24]={
<a name="l00154"></a>00154 {       0x5a827999, 0xd151d6a1, 0x482133a9, 0xbef090b1, 0x35bfedb9, 0xac8f4ac1, 
<a name="l00155"></a>00155         0x235ea7c9, 0x9a2e04d1, 0x10fd61d9, 0x87ccbee1, 0xfe9c1be9, 0x756b78f1, 
<a name="l00156"></a>00156         0xec3ad5f9, 0x630a3301, 0xd9d99009, 0x50a8ed11, 0xc7784a19, 0x3e47a721, 
<a name="l00157"></a>00157         0xb5170429, 0x2be66131, 0xa2b5be39, 0x19851b41, 0x90547849, 0x0723d551}, 
<a name="l00158"></a>00158 {       0xc95c653a, 0x402bc242, 0xb6fb1f4a, 0x2dca7c52, 0xa499d95a, 0x1b693662, 
<a name="l00159"></a>00159         0x9238936a, 0x0907f072, 0x7fd74d7a, 0xf6a6aa82, 0x6d76078a, 0xe4456492, 
<a name="l00160"></a>00160         0x5b14c19a, 0xd1e41ea2, 0x48b37baa, 0xbf82d8b2, 0x365235ba, 0xad2192c2, 
<a name="l00161"></a>00161         0x23f0efca, 0x9ac04cd2, 0x118fa9da, 0x885f06e2, 0xff2e63ea, 0x75fdc0f2}, 
<a name="l00162"></a>00162 {       0x383650db, 0xaf05ade3, 0x25d50aeb, 0x9ca467f3, 0x1373c4fb, 0x8a432203, 
<a name="l00163"></a>00163         0x01127f0b, 0x77e1dc13, 0xeeb1391b, 0x65809623, 0xdc4ff32b, 0x531f5033, 
<a name="l00164"></a>00164         0xc9eead3b, 0x40be0a43, 0xb78d674b, 0x2e5cc453, 0xa52c215b, 0x1bfb7e63, 
<a name="l00165"></a>00165         0x92cadb6b, 0x099a3873, 0x8069957b, 0xf738f283, 0x6e084f8b, 0xe4d7ac93}, 
<a name="l00166"></a>00166 {       0xa7103c7c, 0x1ddf9984, 0x94aef68c, 0x0b7e5394, 0x824db09c, 0xf91d0da4, 
<a name="l00167"></a>00167         0x6fec6aac, 0xe6bbc7b4, 0x5d8b24bc, 0xd45a81c4, 0x4b29decc, 0xc1f93bd4, 
<a name="l00168"></a>00168         0x38c898dc, 0xaf97f5e4, 0x266752ec, 0x9d36aff4, 0x14060cfc, 0x8ad56a04, 
<a name="l00169"></a>00169         0x01a4c70c, 0x78742414, 0xef43811c, 0x6612de24, 0xdce23b2c, 0x53b19834}, 
<a name="l00170"></a>00170 {       0x15ea281d, 0x8cb98525, 0x0388e22d, 0x7a583f35, 0xf1279c3d, 0x67f6f945, 
<a name="l00171"></a>00171         0xdec6564d, 0x5595b355, 0xcc65105d, 0x43346d65, 0xba03ca6d, 0x30d32775, 
<a name="l00172"></a>00172         0xa7a2847d, 0x1e71e185, 0x95413e8d, 0x0c109b95, 0x82dff89d, 0xf9af55a5, 
<a name="l00173"></a>00173         0x707eb2ad, 0xe74e0fb5, 0x5e1d6cbd, 0xd4ecc9c5, 0x4bbc26cd, 0xc28b83d5}, 
<a name="l00174"></a>00174 {       0x84c413be, 0xfb9370c6, 0x7262cdce, 0xe9322ad6, 0x600187de, 0xd6d0e4e6, 
<a name="l00175"></a>00175         0x4da041ee, 0xc46f9ef6, 0x3b3efbfe, 0xb20e5906, 0x28ddb60e, 0x9fad1316, 
<a name="l00176"></a>00176         0x167c701e, 0x8d4bcd26, 0x041b2a2e, 0x7aea8736, 0xf1b9e43e, 0x68894146, 
<a name="l00177"></a>00177         0xdf589e4e, 0x5627fb56, 0xccf7585e, 0x43c6b566, 0xba96126e, 0x31656f76}, 
<a name="l00178"></a>00178 {       0xf39dff5f, 0x6a6d5c67, 0xe13cb96f, 0x580c1677, 0xcedb737f, 0x45aad087, 
<a name="l00179"></a>00179         0xbc7a2d8f, 0x33498a97, 0xaa18e79f, 0x20e844a7, 0x97b7a1af, 0x0e86feb7, 
<a name="l00180"></a>00180         0x85565bbf, 0xfc25b8c7, 0x72f515cf, 0xe9c472d7, 0x6093cfdf, 0xd7632ce7, 
<a name="l00181"></a>00181         0x4e3289ef, 0xc501e6f7, 0x3bd143ff, 0xb2a0a107, 0x296ffe0f, 0xa03f5b17}, 
<a name="l00182"></a>00182 {       0x6277eb00, 0xd9474808, 0x5016a510, 0xc6e60218, 0x3db55f20, 0xb484bc28, 
<a name="l00183"></a>00183         0x2b541930, 0xa2237638, 0x18f2d340, 0x8fc23048, 0x06918d50, 0x7d60ea58, 
<a name="l00184"></a>00184         0xf4304760, 0x6affa468, 0xe1cf0170, 0x589e5e78, 0xcf6dbb80, 0x463d1888, 
<a name="l00185"></a>00185         0xbd0c7590, 0x33dbd298, 0xaaab2fa0, 0x217a8ca8, 0x9849e9b0, 0x0f1946b8} 
<a name="l00186"></a>00186 };
<a name="l00187"></a>00187 
<a name="l00188"></a>00188 <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> CAST256::Base::t_r[8][24]={ 
<a name="l00189"></a>00189         {19, 27, 3, 11, 19, 27, 3, 11, 19, 27, 3, 11, 19, 27, 3, 11, 19, 27, 3, 11, 19, 27, 3, 11}, 
<a name="l00190"></a>00190         {4, 12, 20, 28, 4, 12, 20, 28, 4, 12, 20, 28, 4, 12, 20, 28, 4, 12, 20, 28, 4, 12, 20, 28}, 
<a name="l00191"></a>00191         {21, 29, 5, 13, 21, 29, 5, 13, 21, 29, 5, 13, 21, 29, 5, 13, 21, 29, 5, 13, 21, 29, 5, 13}, 
<a name="l00192"></a>00192         {6, 14, 22, 30, 6, 14, 22, 30, 6, 14, 22, 30, 6, 14, 22, 30, 6, 14, 22, 30, 6, 14, 22, 30}, 
<a name="l00193"></a>00193         {23, 31, 7, 15, 23, 31, 7, 15, 23, 31, 7, 15, 23, 31, 7, 15, 23, 31, 7, 15, 23, 31, 7, 15}, 
<a name="l00194"></a>00194         {8, 16, 24, 0, 8, 16, 24, 0, 8, 16, 24, 0, 8, 16, 24, 0, 8, 16, 24, 0, 8, 16, 24, 0}, 
<a name="l00195"></a>00195         {25, 1, 9, 17, 25, 1, 9, 17, 25, 1, 9, 17, 25, 1, 9, 17, 25, 1, 9, 17, 25, 1, 9, 17}, 
<a name="l00196"></a>00196         {10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2, 10, 18, 26, 2}
<a name="l00197"></a>00197 };
<a name="l00198"></a>00198 
<a name="l00199"></a>00199 <span class="preprocessor">#define Q(i) \</span>
<a name="l00200"></a>00200 <span class="preprocessor">        F1(block[2],block[3],8*i+4,-4); \</span>
<a name="l00201"></a>00201 <span class="preprocessor">        F2(block[1],block[2],8*i+5,-4); \</span>
<a name="l00202"></a>00202 <span class="preprocessor">        F3(block[0],block[1],8*i+6,-4); \</span>
<a name="l00203"></a>00203 <span class="preprocessor">        F1(block[3],block[0],8*i+7,-4);</span>
<a name="l00204"></a>00204 <span class="preprocessor"></span>
<a name="l00205"></a>00205 <span class="preprocessor">#define QBar(i) \</span>
<a name="l00206"></a>00206 <span class="preprocessor">        F1(block[3],block[0],8*i+7,-4); \</span>
<a name="l00207"></a>00207 <span class="preprocessor">        F3(block[0],block[1],8*i+6,-4); \</span>
<a name="l00208"></a>00208 <span class="preprocessor">        F2(block[1],block[2],8*i+5,-4); \</span>
<a name="l00209"></a>00209 <span class="preprocessor">        F1(block[2],block[3],8*i+4,-4);</span>
<a name="l00210"></a>00210 <span class="preprocessor"></span>
<a name="l00211"></a>00211 <span class="comment">/* CAST256's encrypt/decrypt functions  are identical except for the order that</span>
<a name="l00212"></a>00212 <span class="comment">the keys are used */</span>
<a name="l00213"></a>00213 
<a name="l00214"></a>00214 <span class="keywordtype">void</span> CAST256::Base::ProcessAndXorBlock(<span class="keyword">const</span> byte *inBlock, <span class="keyword">const</span> byte *xorBlock, byte *outBlock)<span class="keyword"> const</span>
<a name="l00215"></a>00215 <span class="keyword"></span>{
<a name="l00216"></a>00216         word32 t, block[4];
<a name="l00217"></a>00217         <a class="code" href="struct_block_get_and_put.html#07781cc0817613fe47e8070999cf4b95">Block::Get</a>(inBlock)(block[0])(block[1])(block[2])(block[3]);
<a name="l00218"></a>00218 
<a name="l00219"></a>00219         <span class="comment">// Perform 6 forward quad rounds</span>
<a name="l00220"></a>00220         Q(0);
<a name="l00221"></a>00221         Q(1);
<a name="l00222"></a>00222         Q(2);
<a name="l00223"></a>00223         Q(3);
<a name="l00224"></a>00224         Q(4);
<a name="l00225"></a>00225         Q(5);
<a name="l00226"></a>00226 
<a name="l00227"></a>00227         <span class="comment">// Perform 6 reverse quad rounds</span>
<a name="l00228"></a>00228         QBar(6);
<a name="l00229"></a>00229         QBar(7);
<a name="l00230"></a>00230         QBar(8);
<a name="l00231"></a>00231         QBar(9);
<a name="l00232"></a>00232         QBar(10);
<a name="l00233"></a>00233         QBar(11);
<a name="l00234"></a>00234 
<a name="l00235"></a>00235         <a class="code" href="struct_block_get_and_put.html#63d96a17e8118407e02896d0b0f8d92d">Block::Put</a>(xorBlock, outBlock)(block[0])(block[1])(block[2])(block[3]);
<a name="l00236"></a>00236 }
<a name="l00237"></a>00237 
<a name="l00238"></a>00238 <span class="comment">/* Set up a CAST-256 key */</span>
<a name="l00239"></a>00239 
<a name="l00240"></a>00240 <span class="keywordtype">void</span> CAST256::Base::Omega(<span class="keywordtype">int</span> i, word32 kappa[8])
<a name="l00241"></a>00241 {
<a name="l00242"></a>00242         word32 t;
<a name="l00243"></a>00243 
<a name="l00244"></a>00244         f1(kappa[6],kappa[7],t_m[0][i],t_r[0][i]);
<a name="l00245"></a>00245         f2(kappa[5],kappa[6],t_m[1][i],t_r[1][i]);
<a name="l00246"></a>00246         f3(kappa[4],kappa[5],t_m[2][i],t_r[2][i]);
<a name="l00247"></a>00247         f1(kappa[3],kappa[4],t_m[3][i],t_r[3][i]);
<a name="l00248"></a>00248         f2(kappa[2],kappa[3],t_m[4][i],t_r[4][i]);
<a name="l00249"></a>00249         f3(kappa[1],kappa[2],t_m[5][i],t_r[5][i]);
<a name="l00250"></a>00250         f1(kappa[0],kappa[1],t_m[6][i],t_r[6][i]);
<a name="l00251"></a>00251         f2(kappa[7],kappa[0],t_m[7][i],t_r[7][i]);
<a name="l00252"></a>00252 }
<a name="l00253"></a>00253 
<a name="l00254"></a>00254 <span class="keywordtype">void</span> CAST256::Base::UncheckedSetKey(<span class="keyword">const</span> byte *userKey, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> keylength, <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;)
<a name="l00255"></a>00255 {
<a name="l00256"></a>00256         AssertValidKeyLength(keylength);
<a name="l00257"></a>00257 
<a name="l00258"></a>00258         word32 kappa[8];
<a name="l00259"></a>00259         GetUserKey(<a class="code" href="cryptlib_8h.html#aeb92d42f5a6e27b8ba19f18d69d142bf0c3bb6c718cc7ff0bffef4e8f178c57">BIG_ENDIAN_ORDER</a>, kappa, 8, userKey, keylength);
<a name="l00260"></a>00260 
<a name="l00261"></a>00261         <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=0; i&lt;12; ++i)
<a name="l00262"></a>00262         {
<a name="l00263"></a>00263                 Omega(2*i,kappa);
<a name="l00264"></a>00264                 Omega(2*i+1,kappa);
<a name="l00265"></a>00265                 
<a name="l00266"></a>00266                 K[8*i]=kappa[0] &amp; 31;
<a name="l00267"></a>00267                 K[8*i+1]=kappa[2] &amp; 31;
<a name="l00268"></a>00268                 K[8*i+2]=kappa[4] &amp; 31;
<a name="l00269"></a>00269                 K[8*i+3]=kappa[6] &amp; 31;
<a name="l00270"></a>00270                 K[8*i+4]=kappa[7];
<a name="l00271"></a>00271                 K[8*i+5]=kappa[5];
<a name="l00272"></a>00272                 K[8*i+6]=kappa[3];
<a name="l00273"></a>00273                 K[8*i+7]=kappa[1];
<a name="l00274"></a>00274         }
<a name="l00275"></a>00275 
<a name="l00276"></a>00276         <span class="keywordflow">if</span> (!IsForwardTransformation())
<a name="l00277"></a>00277         {
<a name="l00278"></a>00278                 <span class="keywordflow">for</span>(<span class="keywordtype">int</span> j=0; j&lt;6; ++j)
<a name="l00279"></a>00279                 {
<a name="l00280"></a>00280                         <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=0; i&lt;4; ++i)
<a name="l00281"></a>00281                         {
<a name="l00282"></a>00282                                 <span class="keywordtype">int</span> i1=8*j+i;
<a name="l00283"></a>00283                                 <span class="keywordtype">int</span> i2=8*(11-j)+i;
<a name="l00284"></a>00284 
<a name="l00285"></a>00285                                 assert(i1&lt;i2);
<a name="l00286"></a>00286 
<a name="l00287"></a>00287                                 <a class="code" href="gf2n_8h.html#cd9c045f0b5c2a7595a8a0872dc80f59">std::swap</a>(K[i1],K[i2]); 
<a name="l00288"></a>00288                                 <a class="code" href="gf2n_8h.html#cd9c045f0b5c2a7595a8a0872dc80f59">std::swap</a>(K[i1+4],K[i2+4]); 
<a name="l00289"></a>00289                         }
<a name="l00290"></a>00290                 }
<a name="l00291"></a>00291         }
<a name="l00292"></a>00292 
<a name="l00293"></a>00293         memset(kappa, 0, <span class="keyword">sizeof</span>(kappa));
<a name="l00294"></a>00294 }
<a name="l00295"></a>00295 
<a name="l00296"></a>00296 NAMESPACE_END
</pre></div><hr size="1"><address style="text-align: right;"><small>Generated on Fri Jun 1 11:11:19 2007 for Crypto++ by&nbsp;
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