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<a name="l00332"></a>00332 AS2( mov edi, [K_REG+4*4])<a name="l00333"></a>00333 AS2( mov eax, [K_REG+5*4])<a name="l00334"></a>00334 AS2( mov ebx, [K_REG+6*4])<a name="l00335"></a>00335 AS2( mov edx, [K_REG+7*4])<a name="l00336"></a>00336 <a name="l00337"></a>00337 QUARTER_ROUND(c, t0, t1, t2, t3)<a name="l00338"></a>00338 RESTORE_2(ecx)<a name="l00339"></a>00339 QUARTER_ROUND(c, t3, t0, t1, t2)<a name="l00340"></a>00340 RESTORE_1(ecx)<a name="l00341"></a>00341 QUARTER_ROUND(c, t2, t3, t0, t1)<a name="l00342"></a>00342 RESTORE_0(ecx)<a name="l00343"></a>00343 QUARTER_ROUND(c, t1, t2, t3, t0)<a name="l00344"></a>00344 SAVE_2(ebx)<a name="l00345"></a>00345 SAVE_1(eax)<a name="l00346"></a>00346 SAVE_0(edi)<a name="l00347"></a>00347 <a name="l00348"></a>00348 RESTORE_K<a name="l00349"></a>00349 RESTORE_K_END<a name="l00350"></a>00350 AS2( add K_REG, 8*4)<a name="l00351"></a>00351 SAVE_K<a name="l00352"></a>00352 AS2( cmp K_END_REG, K_REG)<a name="l00353"></a>00353 ASJ( jne, 0, b)<a name="l00354"></a>00354 <a name="l00355"></a>00355 <span class="preprocessor">#undef QUARTER_ROUND</span><a name="l00356"></a>00356 <span class="preprocessor"></span><span class="preprocessor">#undef s0</span><a name="l00357"></a>00357 <span class="preprocessor"></span><span class="preprocessor">#undef s1</span><a name="l00358"></a>00358 <span class="preprocessor"></span><span class="preprocessor">#undef s2</span><a name="l00359"></a>00359 <span class="preprocessor"></span><span class="preprocessor">#undef s3</span><a name="l00360"></a>00360 <span class="preprocessor"></span><span class="preprocessor">#undef t0</span><a name="l00361"></a>00361 <span class="preprocessor"></span><span class="preprocessor">#undef t1</span><a name="l00362"></a>00362 <span class="preprocessor"></span><span class="preprocessor">#undef t2</span><a name="l00363"></a>00363 <span class="preprocessor"></span><span class="preprocessor">#undef t3</span><a name="l00364"></a>00364 <span class="preprocessor"></span><a name="l00365"></a>00365 AS2( mov eax, [K_END_REG+0*4])<a name="l00366"></a>00366 AS2( mov ecx, [K_END_REG+1*4])<a name="l00367"></a>00367 AS2( mov esi, [K_END_REG+2*4])<a name="l00368"></a>00368 AS2( mov edi, [K_END_REG+3*4])<a name="l00369"></a>00369 <a name="l00370"></a>00370 <span class="preprocessor">#define QUARTER_ROUND(a, b, c, d) \</span><a name="l00371"></a>00371 <span class="preprocessor"> AS2( movzx ebx, dl)\</span><a name="l00372"></a>00372 <span class="preprocessor"> AS2( movzx ebx, BYTE PTR [WORD_REG(bp)+1+4*WORD_REG(bx)])\</span><a name="l00373"></a>00373 <span class="preprocessor"> AS2( shl ebx, 3*8)\</span><a name="l00374"></a>00374 <span class="preprocessor"> AS2( xor a, ebx)\</span><a name="l00375"></a>00375 <span class="preprocessor"> AS2( movzx ebx, dh)\</span><a name="l00376"></a>00376 <span class="preprocessor"> AS2( movzx ebx, BYTE PTR [WORD_REG(bp)+1+4*WORD_REG(bx)])\</span><a name="l00377"></a>00377 <span class="preprocessor"> AS2( shl ebx, 2*8)\</span><a name="l00378"></a>00378 <span class="preprocessor"> AS2( xor b, ebx)\</span><a name="l00379"></a>00379 <span class="preprocessor"> AS2( shr edx, 16)\</span><a name="l00380"></a>00380 <span class="preprocessor"> AS2( movzx ebx, dl)\</span><a name="l00381"></a>00381 <span class="preprocessor"> AS2( shr edx, 8)\</span><a name="l00382"></a>00382 <span class="preprocessor"> AS2( movzx ebx, BYTE PTR [WORD_REG(bp)+1+4*WORD_REG(bx)])\</span><a name="l00383"></a>00383 <span class="preprocessor"> AS2( shl ebx, 1*8)\</span><a name="l00384"></a>00384 <span class="preprocessor"> AS2( xor c, ebx)\</span><a name="l00385"></a>00385 <span class="preprocessor"> AS2( movzx ebx, BYTE PTR [WORD_REG(bp)+1+4*WORD_REG(dx)])\</span><a name="l00386"></a>00386 <span class="preprocessor"> AS2( xor d, ebx)</span><a name="l00387"></a>00387 <span class="preprocessor"></span><a name="l00388"></a>00388 QUARTER_ROUND(eax, ecx, esi, edi)<a name="l00389"></a>00389 RESTORE_2(edx)<a name="l00390"></a>00390 QUARTER_ROUND(edi, eax, ecx, esi)<a name="l00391"></a>00391 RESTORE_1(edx)<a name="l00392"></a>00392 QUARTER_ROUND(esi, edi, eax, ecx)<a name="l00393"></a>00393 RESTORE_0(edx)<a name="l00394"></a>00394 QUARTER_ROUND(ecx, esi, edi, eax)<a name="l00395"></a>00395 <a name="l00396"></a>00396 <span class="preprocessor">#undef QUARTER_ROUND</span><a name="l00397"></a>00397 <span class="preprocessor"></span><a name="l00398"></a>00398 <span class="preprocessor">#if CRYPTOPP_BOOL_X64</span><a name="l00399"></a>00399 <span class="preprocessor"></span> AS1(popq r12)<a name="l00400"></a>00400 AS1(popq r11)<a name="l00401"></a>00401 AS1(popq r10)<a name="l00402"></a>00402 AS1(popq K_END_REG)<a name="l00403"></a>00403 AS1(popq K_REG)<a name="l00404"></a>00404 <span class="preprocessor">#else</span><a name="l00405"></a>00405 <span class="preprocessor"></span> AS1(emms)<a name="l00406"></a>00406 <span class="preprocessor">#endif</span><a name="l00407"></a>00407 <span class="preprocessor"></span> AS_POP( bp)<a name="l00408"></a>00408 <a name="l00409"></a>00409 <span class="preprocessor">#if defined(__GNUC__) || (defined(_MSC_VER) && _MSC_VER < 1300)</span><a name="l00410"></a>00410 <span class="preprocessor"></span> AS_POP( bx)<a name="l00411"></a>00411 <span class="preprocessor">#endif</span><a name="l00412"></a>00412 <span class="preprocessor"></span><span class="preprocessor">#ifdef __GNUC__</span><a name="l00413"></a>00413 <span class="preprocessor"></span> <span class="stringliteral">".att_syntax prefix;"</span><a name="l00414"></a>00414 : <span class="stringliteral">"=a"</span> (t0), <span class="stringliteral">"=c"</span> (t1), <span class="stringliteral">"=S"</span> (t2), <span class="stringliteral">"=D"</span> (t3)<a name="l00415"></a>00415 : <span class="stringliteral">"a"</span> (Te), <span class="stringliteral">"D"</span> (inBlock), <span class="stringliteral">"S"</span> (k), <span class="stringliteral">"c"</span> (kLoopEnd), <span class="stringliteral">"d"</span> (g_cacheLineSize)<a name="l00416"></a>00416 : <span class="stringliteral">"memory"</span>, <span class="stringliteral">"cc"</span><a name="l00417"></a>00417 );<a name="l00418"></a>00418 <a name="l00419"></a>00419 <span class="keywordflow">if</span> (xorBlock)<a name="l00420"></a>00420 {<a name="l00421"></a>00421 t0 ^= ((<span class="keyword">const</span> word32 *)xorBlock)[0];<a name="l00422"></a>00422 t1 ^= ((<span class="keyword">const</span> word32 *)xorBlock)[1];<a name="l00423"></a>00423 t2 ^= ((<span class="keyword">const</span> word32 *)xorBlock)[2];<a name="l00424"></a>00424 t3 ^= ((<span class="keyword">const</span> word32 *)xorBlock)[3];<a name="l00425"></a>00425 }<a name="l00426"></a>00426 ((word32 *)outBlock)[0] = t0;<a name="l00427"></a>00427 ((word32 *)outBlock)[1] = t1;<a name="l00428"></a>00428 ((word32 *)outBlock)[2] = t2;<a name="l00429"></a>00429 ((word32 *)outBlock)[3] = t3;<a name="l00430"></a>00430 <span class="preprocessor">#else</span><a name="l00431"></a>00431 <span class="preprocessor"></span> AS2( mov WORD_REG(bx), xorBlock)<a name="l00432"></a>00432 AS2( test WORD_REG(bx), WORD_REG(bx))<a name="l00433"></a>00433 ASJ( jz, 1, f)<a name="l00434"></a>00434 AS2( xor eax, [WORD_REG(bx)+0*4])<a name="l00435"></a>00435 AS2( xor ecx, [WORD_REG(bx)+1*4])<a name="l00436"></a>00436 AS2( xor esi, [WORD_REG(bx)+2*4])<a name="l00437"></a>00437 AS2( xor edi, [WORD_REG(bx)+3*4])<a name="l00438"></a>00438 ASL(1)<a name="l00439"></a>00439 AS2( mov WORD_REG(bx), outBlock)<a name="l00440"></a>00440 AS2( mov [WORD_REG(bx)+0*4], eax)<a name="l00441"></a>00441 AS2( mov [WORD_REG(bx)+1*4], ecx)<a name="l00442"></a>00442 AS2( mov [WORD_REG(bx)+2*4], esi)<a name="l00443"></a>00443 AS2( mov [WORD_REG(bx)+3*4], edi)<a name="l00444"></a>00444 <span class="preprocessor">#endif</span><a name="l00445"></a>00445 <span class="preprocessor"></span> }<a name="l00446"></a>00446 <span class="keywordflow">else</span><a name="l00447"></a>00447 <span class="preprocessor">#endif // #ifdef CRYPTOPP_X86_ASM_AVAILABLE</span><a name="l00448"></a>00448 <span class="preprocessor"></span> {<a name="l00449"></a>00449 word32 s0, s1, s2, s3, t0, t1, t2, t3;<a name="l00450"></a>00450 <span class="keyword">const</span> word32 *rk = m_key;<a name="l00451"></a>00451 <a name="l00452"></a>00452 s0 = ((<span class="keyword">const</span> word32 *)inBlock)[0] ^ rk[0];<a name="l00453"></a>00453 s1 = ((<span class="keyword">const</span> word32 *)inBlock)[1] ^ rk[1];<a name="l00454"></a>00454 s2 = ((<span class="keyword">const</span> word32 *)inBlock)[2] ^ rk[2];<a name="l00455"></a>00455 s3 = ((<span class="keyword">const</span> word32 *)inBlock)[3] ^ rk[3];<a name="l00456"></a>00456 t0 = rk[4];<a name="l00457"></a>00457 t1 = rk[5];<a name="l00458"></a>00458 t2 = rk[6];<a name="l00459"></a>00459 t3 = rk[7];<a name="l00460"></a>00460 rk += 8;<a name="l00461"></a>00461 <a name="l00462"></a>00462 <span class="comment">// timing attack countermeasure. see comments at top for more details</span><a name="l00463"></a>00463 <span class="keyword">const</span> <span class="keywordtype">int</span> cacheLineSize = GetCacheLineSize();<a name="l00464"></a>00464 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i;<a name="l00465"></a>00465 word32 u = 0;<a name="l00466"></a>00466 <span class="keywordflow">for</span> (i=0; i<1024; i+=cacheLineSize)<a name="l00467"></a>00467 u &= *(<span class="keyword">const</span> word32 *)(((<span class="keyword">const</span> byte *)Te)+i);<a name="l00468"></a>00468 u &= Te[255];<a name="l00469"></a>00469 s0 |= u; s1 |= u; s2 |= u; s3 |= u;<a name="l00470"></a>00470 <a name="l00471"></a>00471 <span class="comment">// first round</span><a name="l00472"></a>00472 <span class="preprocessor">#ifdef IS_BIG_ENDIAN</span><a name="l00473"></a>00473 <span class="preprocessor"></span><span class="preprocessor">#define QUARTER_ROUND(t, a, b, c, d) \</span><a name="l00474"></a>00474 <span class="preprocessor"> a ^= rotrFixed(Te[byte(t)], 24); t >>= 8;\</span><a name="l00475"></a>00475 <span class="preprocessor"> b ^= rotrFixed(Te[byte(t)], 16); t >>= 8;\</span><a name="l00476"></a>00476 <span class="preprocessor"> c ^= rotrFixed(Te[byte(t)], 8); t >>= 8;\</span><a name="l00477"></a>00477 <span class="preprocessor"> d ^= Te[t];</span><a name="l00478"></a>00478 <span class="preprocessor"></span><span class="preprocessor">#else</span><a name="l00479"></a>00479 <span class="preprocessor"></span><span class="preprocessor">#define QUARTER_ROUND(t, a, b, c, d) \</span><a name="l00480"></a>00480 <span class="preprocessor"> d ^= Te[byte(t)]; t >>= 8;\</span><a name="l00481"></a>00481 <span class="preprocessor"> c ^= rotrFixed(Te[byte(t)], 8); t >>= 8;\</span><a name="l00482"></a>00482 <span class="preprocessor"> b ^= rotrFixed(Te[byte(t)], 16); t >>= 8;\</span><a name="l00483"></a>00483 <span class="preprocessor"> a ^= rotrFixed(Te[t], 24);</span><a name="l00484"></a>00484 <span class="preprocessor"></span><span class="preprocessor">#endif</span><a name="l00485"></a>00485 <span class="preprocessor"></span><a name="l00486"></a>00486 QUARTER_ROUND(s3, t0, t1, t2, t3)<a name="l00487"></a>00487 QUARTER_ROUND(s2, t3, t0, t1, t2)<a name="l00488"></a>00488 QUARTER_ROUND(s1, t2, t3, t0, t1)<a name="l00489"></a>00489 QUARTER_ROUND(s0, t1, t2, t3, t0)<a name="l00490"></a>00490 <span class="preprocessor">#undef QUARTER_ROUND</span><a name="l00491"></a>00491 <span class="preprocessor"></span><a name="l00492"></a>00492 <span class="comment">// Nr - 2 full rounds:</span><a name="l00493"></a>00493 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> r = m_rounds/2 - 1;<a name="l00494"></a>00494 <span class="keywordflow">do</span><a name="l00495"></a>00495 {<a name="l00496"></a>00496 <span class="preprocessor">#define QUARTER_ROUND(t, a, b, c, d) \</span><a name="l00497"></a>00497 <span class="preprocessor"> a ^= Te[3*256+byte(t)]; t >>= 8;\</span><a name="l00498"></a>00498 <span class="preprocessor"> b ^= Te[2*256+byte(t)]; t >>= 8;\</span><a name="l00499"></a>00499 <span class="preprocessor"> c ^= Te[1*256+byte(t)]; t >>= 8;\</span><a name="l00500"></a>00500 <span class="preprocessor"> d ^= Te[t];</span><a name="l00501"></a>00501 <span class="preprocessor"></span><a name="l00502"></a>00502 s0 = rk[0]; s1 = rk[1]; s2 = rk[2]; s3 = rk[3];<a name="l00503"></a>00503 <a name="l00504"></a>00504 QUARTER_ROUND(t3, s0, s1, s2, s3)<a name="l00505"></a>00505 QUARTER_ROUND(t2, s3, s0, s1, s2)<a name="l00506"></a>00506 QUARTER_ROUND(t1, s2, s3, s0, s1)<a name="l00507"></a>00507 QUARTER_ROUND(t0, s1, s2, s3, s0)⌨️ 快捷键说明
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