aes-586.pl revision 162912
1#!/usr/bin/env perl 2# 3# ==================================================================== 4# Written by Andy Polyakov <appro@fy.chalmers.se> for the OpenSSL 5# project. Rights for redistribution and usage in source and binary 6# forms are granted according to the OpenSSL license. 7# ==================================================================== 8# 9# Version 3.6. 10# 11# You might fail to appreciate this module performance from the first 12# try. If compared to "vanilla" linux-ia32-icc target, i.e. considered 13# to be *the* best Intel C compiler without -KPIC, performance appears 14# to be virtually identical... But try to re-configure with shared 15# library support... Aha! Intel compiler "suddenly" lags behind by 30% 16# [on P4, more on others]:-) And if compared to position-independent 17# code generated by GNU C, this code performs *more* than *twice* as 18# fast! Yes, all this buzz about PIC means that unlike other hand- 19# coded implementations, this one was explicitly designed to be safe 20# to use even in shared library context... This also means that this 21# code isn't necessarily absolutely fastest "ever," because in order 22# to achieve position independence an extra register has to be 23# off-loaded to stack, which affects the benchmark result. 24# 25# Special note about instruction choice. Do you recall RC4_INT code 26# performing poorly on P4? It might be the time to figure out why. 27# RC4_INT code implies effective address calculations in base+offset*4 28# form. Trouble is that it seems that offset scaling turned to be 29# critical path... At least eliminating scaling resulted in 2.8x RC4 30# performance improvement [as you might recall]. As AES code is hungry 31# for scaling too, I [try to] avoid the latter by favoring off-by-2 32# shifts and masking the result with 0xFF<<2 instead of "boring" 0xFF. 33# 34# As was shown by Dean Gaudet <dean@arctic.org>, the above note turned 35# void. Performance improvement with off-by-2 shifts was observed on 36# intermediate implementation, which was spilling yet another register 37# to stack... Final offset*4 code below runs just a tad faster on P4, 38# but exhibits up to 10% improvement on other cores. 39# 40# Second version is "monolithic" replacement for aes_core.c, which in 41# addition to AES_[de|en]crypt implements AES_set_[de|en]cryption_key. 42# This made it possible to implement little-endian variant of the 43# algorithm without modifying the base C code. Motivating factor for 44# the undertaken effort was that it appeared that in tight IA-32 45# register window little-endian flavor could achieve slightly higher 46# Instruction Level Parallelism, and it indeed resulted in up to 15% 47# better performance on most recent �-archs... 48# 49# Third version adds AES_cbc_encrypt implementation, which resulted in 50# up to 40% performance imrovement of CBC benchmark results. 40% was 51# observed on P4 core, where "overall" imrovement coefficient, i.e. if 52# compared to PIC generated by GCC and in CBC mode, was observed to be 53# as large as 4x:-) CBC performance is virtually identical to ECB now 54# and on some platforms even better, e.g. 17.6 "small" cycles/byte on 55# Opteron, because certain function prologues and epilogues are 56# effectively taken out of the loop... 57# 58# Version 3.2 implements compressed tables and prefetch of these tables 59# in CBC[!] mode. Former means that 3/4 of table references are now 60# misaligned, which unfortunately has negative impact on elder IA-32 61# implementations, Pentium suffered 30% penalty, PIII - 10%. 62# 63# Version 3.3 avoids L1 cache aliasing between stack frame and 64# S-boxes, and 3.4 - L1 cache aliasing even between key schedule. The 65# latter is achieved by copying the key schedule to controlled place in 66# stack. This unfortunately has rather strong impact on small block CBC 67# performance, ~2x deterioration on 16-byte block if compared to 3.3. 68# 69# Version 3.5 checks if there is L1 cache aliasing between user-supplied 70# key schedule and S-boxes and abstains from copying the former if 71# there is no. This allows end-user to consciously retain small block 72# performance by aligning key schedule in specific manner. 73# 74# Version 3.6 compresses Td4 to 256 bytes and prefetches it in ECB. 75# 76# Current ECB performance numbers for 128-bit key in CPU cycles per 77# processed byte [measure commonly used by AES benchmarkers] are: 78# 79# small footprint fully unrolled 80# P4 24 22 81# AMD K8 20 19 82# PIII 25 23 83# Pentium 81 78 84 85push(@INC,"perlasm","../../perlasm"); 86require "x86asm.pl"; 87 88&asm_init($ARGV[0],"aes-586.pl",$ARGV[$#ARGV] eq "386"); 89 90$s0="eax"; 91$s1="ebx"; 92$s2="ecx"; 93$s3="edx"; 94$key="edi"; 95$acc="esi"; 96 97$compromise=0; # $compromise=128 abstains from copying key 98 # schedule to stack when encrypting inputs 99 # shorter than 128 bytes at the cost of 100 # risksing aliasing with S-boxes. In return 101 # you get way better, up to +70%, small block 102 # performance. 103$small_footprint=1; # $small_footprint=1 code is ~5% slower [on 104 # recent �-archs], but ~5 times smaller! 105 # I favor compact code to minimize cache 106 # contention and in hope to "collect" 5% back 107 # in real-life applications... 108$vertical_spin=0; # shift "verticaly" defaults to 0, because of 109 # its proof-of-concept status... 110 111# Note that there is no decvert(), as well as last encryption round is 112# performed with "horizontal" shifts. This is because this "vertical" 113# implementation [one which groups shifts on a given $s[i] to form a 114# "column," unlike "horizontal" one, which groups shifts on different 115# $s[i] to form a "row"] is work in progress. It was observed to run 116# few percents faster on Intel cores, but not AMD. On AMD K8 core it's 117# whole 12% slower:-( So we face a trade-off... Shall it be resolved 118# some day? Till then the code is considered experimental and by 119# default remains dormant... 120 121sub encvert() 122{ my ($te,@s) = @_; 123 my $v0 = $acc, $v1 = $key; 124 125 &mov ($v0,$s[3]); # copy s3 126 &mov (&DWP(4,"esp"),$s[2]); # save s2 127 &mov ($v1,$s[0]); # copy s0 128 &mov (&DWP(8,"esp"),$s[1]); # save s1 129 130 &movz ($s[2],&HB($s[0])); 131 &and ($s[0],0xFF); 132 &mov ($s[0],&DWP(0,$te,$s[0],8)); # s0>>0 133 &shr ($v1,16); 134 &mov ($s[3],&DWP(3,$te,$s[2],8)); # s0>>8 135 &movz ($s[1],&HB($v1)); 136 &and ($v1,0xFF); 137 &mov ($s[2],&DWP(2,$te,$v1,8)); # s0>>16 138 &mov ($v1,$v0); 139 &mov ($s[1],&DWP(1,$te,$s[1],8)); # s0>>24 140 141 &and ($v0,0xFF); 142 &xor ($s[3],&DWP(0,$te,$v0,8)); # s3>>0 143 &movz ($v0,&HB($v1)); 144 &shr ($v1,16); 145 &xor ($s[2],&DWP(3,$te,$v0,8)); # s3>>8 146 &movz ($v0,&HB($v1)); 147 &and ($v1,0xFF); 148 &xor ($s[1],&DWP(2,$te,$v1,8)); # s3>>16 149 &mov ($v1,&DWP(4,"esp")); # restore s2 150 &xor ($s[0],&DWP(1,$te,$v0,8)); # s3>>24 151 152 &mov ($v0,$v1); 153 &and ($v1,0xFF); 154 &xor ($s[2],&DWP(0,$te,$v1,8)); # s2>>0 155 &movz ($v1,&HB($v0)); 156 &shr ($v0,16); 157 &xor ($s[1],&DWP(3,$te,$v1,8)); # s2>>8 158 &movz ($v1,&HB($v0)); 159 &and ($v0,0xFF); 160 &xor ($s[0],&DWP(2,$te,$v0,8)); # s2>>16 161 &mov ($v0,&DWP(8,"esp")); # restore s1 162 &xor ($s[3],&DWP(1,$te,$v1,8)); # s2>>24 163 164 &mov ($v1,$v0); 165 &and ($v0,0xFF); 166 &xor ($s[1],&DWP(0,$te,$v0,8)); # s1>>0 167 &movz ($v0,&HB($v1)); 168 &shr ($v1,16); 169 &xor ($s[0],&DWP(3,$te,$v0,8)); # s1>>8 170 &movz ($v0,&HB($v1)); 171 &and ($v1,0xFF); 172 &xor ($s[3],&DWP(2,$te,$v1,8)); # s1>>16 173 &mov ($key,&DWP(12,"esp")); # reincarnate v1 as key 174 &xor ($s[2],&DWP(1,$te,$v0,8)); # s1>>24 175} 176 177sub encstep() 178{ my ($i,$te,@s) = @_; 179 my $tmp = $key; 180 my $out = $i==3?$s[0]:$acc; 181 182 # lines marked with #%e?x[i] denote "reordered" instructions... 183 if ($i==3) { &mov ($key,&DWP(12,"esp")); }##%edx 184 else { &mov ($out,$s[0]); 185 &and ($out,0xFF); } 186 if ($i==1) { &shr ($s[0],16); }#%ebx[1] 187 if ($i==2) { &shr ($s[0],24); }#%ecx[2] 188 &mov ($out,&DWP(0,$te,$out,8)); 189 190 if ($i==3) { $tmp=$s[1]; }##%eax 191 &movz ($tmp,&HB($s[1])); 192 &xor ($out,&DWP(3,$te,$tmp,8)); 193 194 if ($i==3) { $tmp=$s[2]; &mov ($s[1],&DWP(4,"esp")); }##%ebx 195 else { &mov ($tmp,$s[2]); 196 &shr ($tmp,16); } 197 if ($i==2) { &and ($s[1],0xFF); }#%edx[2] 198 &and ($tmp,0xFF); 199 &xor ($out,&DWP(2,$te,$tmp,8)); 200 201 if ($i==3) { $tmp=$s[3]; &mov ($s[2],&DWP(8,"esp")); }##%ecx 202 elsif($i==2){ &movz ($tmp,&HB($s[3])); }#%ebx[2] 203 else { &mov ($tmp,$s[3]); 204 &shr ($tmp,24) } 205 &xor ($out,&DWP(1,$te,$tmp,8)); 206 if ($i<2) { &mov (&DWP(4+4*$i,"esp"),$out); } 207 if ($i==3) { &mov ($s[3],$acc); } 208 &comment(); 209} 210 211sub enclast() 212{ my ($i,$te,@s)=@_; 213 my $tmp = $key; 214 my $out = $i==3?$s[0]:$acc; 215 216 if ($i==3) { &mov ($key,&DWP(12,"esp")); }##%edx 217 else { &mov ($out,$s[0]); } 218 &and ($out,0xFF); 219 if ($i==1) { &shr ($s[0],16); }#%ebx[1] 220 if ($i==2) { &shr ($s[0],24); }#%ecx[2] 221 &mov ($out,&DWP(2,$te,$out,8)); 222 &and ($out,0x000000ff); 223 224 if ($i==3) { $tmp=$s[1]; }##%eax 225 &movz ($tmp,&HB($s[1])); 226 &mov ($tmp,&DWP(0,$te,$tmp,8)); 227 &and ($tmp,0x0000ff00); 228 &xor ($out,$tmp); 229 230 if ($i==3) { $tmp=$s[2]; &mov ($s[1],&DWP(4,"esp")); }##%ebx 231 else { mov ($tmp,$s[2]); 232 &shr ($tmp,16); } 233 if ($i==2) { &and ($s[1],0xFF); }#%edx[2] 234 &and ($tmp,0xFF); 235 &mov ($tmp,&DWP(0,$te,$tmp,8)); 236 &and ($tmp,0x00ff0000); 237 &xor ($out,$tmp); 238 239 if ($i==3) { $tmp=$s[3]; &mov ($s[2],&DWP(8,"esp")); }##%ecx 240 elsif($i==2){ &movz ($tmp,&HB($s[3])); }#%ebx[2] 241 else { &mov ($tmp,$s[3]); 242 &shr ($tmp,24); } 243 &mov ($tmp,&DWP(2,$te,$tmp,8)); 244 &and ($tmp,0xff000000); 245 &xor ($out,$tmp); 246 if ($i<2) { &mov (&DWP(4+4*$i,"esp"),$out); } 247 if ($i==3) { &mov ($s[3],$acc); } 248} 249 250sub _data_word() { my $i; while(defined($i=shift)) { &data_word($i,$i); } } 251 252&public_label("AES_Te"); 253&function_begin_B("_x86_AES_encrypt"); 254 if ($vertical_spin) { 255 # I need high parts of volatile registers to be accessible... 256 &exch ($s1="edi",$key="ebx"); 257 &mov ($s2="esi",$acc="ecx"); 258 } 259 260 # note that caller is expected to allocate stack frame for me! 261 &mov (&DWP(12,"esp"),$key); # save key 262 263 &xor ($s0,&DWP(0,$key)); # xor with key 264 &xor ($s1,&DWP(4,$key)); 265 &xor ($s2,&DWP(8,$key)); 266 &xor ($s3,&DWP(12,$key)); 267 268 &mov ($acc,&DWP(240,$key)); # load key->rounds 269 270 if ($small_footprint) { 271 &lea ($acc,&DWP(-2,$acc,$acc)); 272 &lea ($acc,&DWP(0,$key,$acc,8)); 273 &mov (&DWP(16,"esp"),$acc); # end of key schedule 274 &align (4); 275 &set_label("loop"); 276 if ($vertical_spin) { 277 &encvert("ebp",$s0,$s1,$s2,$s3); 278 } else { 279 &encstep(0,"ebp",$s0,$s1,$s2,$s3); 280 &encstep(1,"ebp",$s1,$s2,$s3,$s0); 281 &encstep(2,"ebp",$s2,$s3,$s0,$s1); 282 &encstep(3,"ebp",$s3,$s0,$s1,$s2); 283 } 284 &add ($key,16); # advance rd_key 285 &xor ($s0,&DWP(0,$key)); 286 &xor ($s1,&DWP(4,$key)); 287 &xor ($s2,&DWP(8,$key)); 288 &xor ($s3,&DWP(12,$key)); 289 &cmp ($key,&DWP(16,"esp")); 290 &mov (&DWP(12,"esp"),$key); 291 &jb (&label("loop")); 292 } 293 else { 294 &cmp ($acc,10); 295 &jle (&label("10rounds")); 296 &cmp ($acc,12); 297 &jle (&label("12rounds")); 298 299 &set_label("14rounds"); 300 for ($i=1;$i<3;$i++) { 301 if ($vertical_spin) { 302 &encvert("ebp",$s0,$s1,$s2,$s3); 303 } else { 304 &encstep(0,"ebp",$s0,$s1,$s2,$s3); 305 &encstep(1,"ebp",$s1,$s2,$s3,$s0); 306 &encstep(2,"ebp",$s2,$s3,$s0,$s1); 307 &encstep(3,"ebp",$s3,$s0,$s1,$s2); 308 } 309 &xor ($s0,&DWP(16*$i+0,$key)); 310 &xor ($s1,&DWP(16*$i+4,$key)); 311 &xor ($s2,&DWP(16*$i+8,$key)); 312 &xor ($s3,&DWP(16*$i+12,$key)); 313 } 314 &add ($key,32); 315 &mov (&DWP(12,"esp"),$key); # advance rd_key 316 &set_label("12rounds"); 317 for ($i=1;$i<3;$i++) { 318 if ($vertical_spin) { 319 &encvert("ebp",$s0,$s1,$s2,$s3); 320 } else { 321 &encstep(0,"ebp",$s0,$s1,$s2,$s3); 322 &encstep(1,"ebp",$s1,$s2,$s3,$s0); 323 &encstep(2,"ebp",$s2,$s3,$s0,$s1); 324 &encstep(3,"ebp",$s3,$s0,$s1,$s2); 325 } 326 &xor ($s0,&DWP(16*$i+0,$key)); 327 &xor ($s1,&DWP(16*$i+4,$key)); 328 &xor ($s2,&DWP(16*$i+8,$key)); 329 &xor ($s3,&DWP(16*$i+12,$key)); 330 } 331 &add ($key,32); 332 &mov (&DWP(12,"esp"),$key); # advance rd_key 333 &set_label("10rounds"); 334 for ($i=1;$i<10;$i++) { 335 if ($vertical_spin) { 336 &encvert("ebp",$s0,$s1,$s2,$s3); 337 } else { 338 &encstep(0,"ebp",$s0,$s1,$s2,$s3); 339 &encstep(1,"ebp",$s1,$s2,$s3,$s0); 340 &encstep(2,"ebp",$s2,$s3,$s0,$s1); 341 &encstep(3,"ebp",$s3,$s0,$s1,$s2); 342 } 343 &xor ($s0,&DWP(16*$i+0,$key)); 344 &xor ($s1,&DWP(16*$i+4,$key)); 345 &xor ($s2,&DWP(16*$i+8,$key)); 346 &xor ($s3,&DWP(16*$i+12,$key)); 347 } 348 } 349 350 if ($vertical_spin) { 351 # "reincarnate" some registers for "horizontal" spin... 352 &mov ($s1="ebx",$key="edi"); 353 &mov ($s2="ecx",$acc="esi"); 354 } 355 &enclast(0,"ebp",$s0,$s1,$s2,$s3); 356 &enclast(1,"ebp",$s1,$s2,$s3,$s0); 357 &enclast(2,"ebp",$s2,$s3,$s0,$s1); 358 &enclast(3,"ebp",$s3,$s0,$s1,$s2); 359 360 &add ($key,$small_footprint?16:160); 361 &xor ($s0,&DWP(0,$key)); 362 &xor ($s1,&DWP(4,$key)); 363 &xor ($s2,&DWP(8,$key)); 364 &xor ($s3,&DWP(12,$key)); 365 366 &ret (); 367 368&set_label("AES_Te",64); # Yes! I keep it in the code segment! 369 &_data_word(0xa56363c6, 0x847c7cf8, 0x997777ee, 0x8d7b7bf6); 370 &_data_word(0x0df2f2ff, 0xbd6b6bd6, 0xb16f6fde, 0x54c5c591); 371 &_data_word(0x50303060, 0x03010102, 0xa96767ce, 0x7d2b2b56); 372 &_data_word(0x19fefee7, 0x62d7d7b5, 0xe6abab4d, 0x9a7676ec); 373 &_data_word(0x45caca8f, 0x9d82821f, 0x40c9c989, 0x877d7dfa); 374 &_data_word(0x15fafaef, 0xeb5959b2, 0xc947478e, 0x0bf0f0fb); 375 &_data_word(0xecadad41, 0x67d4d4b3, 0xfda2a25f, 0xeaafaf45); 376 &_data_word(0xbf9c9c23, 0xf7a4a453, 0x967272e4, 0x5bc0c09b); 377 &_data_word(0xc2b7b775, 0x1cfdfde1, 0xae93933d, 0x6a26264c); 378 &_data_word(0x5a36366c, 0x413f3f7e, 0x02f7f7f5, 0x4fcccc83); 379 &_data_word(0x5c343468, 0xf4a5a551, 0x34e5e5d1, 0x08f1f1f9); 380 &_data_word(0x937171e2, 0x73d8d8ab, 0x53313162, 0x3f15152a); 381 &_data_word(0x0c040408, 0x52c7c795, 0x65232346, 0x5ec3c39d); 382 &_data_word(0x28181830, 0xa1969637, 0x0f05050a, 0xb59a9a2f); 383 &_data_word(0x0907070e, 0x36121224, 0x9b80801b, 0x3de2e2df); 384 &_data_word(0x26ebebcd, 0x6927274e, 0xcdb2b27f, 0x9f7575ea); 385 &_data_word(0x1b090912, 0x9e83831d, 0x742c2c58, 0x2e1a1a34); 386 &_data_word(0x2d1b1b36, 0xb26e6edc, 0xee5a5ab4, 0xfba0a05b); 387 &_data_word(0xf65252a4, 0x4d3b3b76, 0x61d6d6b7, 0xceb3b37d); 388 &_data_word(0x7b292952, 0x3ee3e3dd, 0x712f2f5e, 0x97848413); 389 &_data_word(0xf55353a6, 0x68d1d1b9, 0x00000000, 0x2cededc1); 390 &_data_word(0x60202040, 0x1ffcfce3, 0xc8b1b179, 0xed5b5bb6); 391 &_data_word(0xbe6a6ad4, 0x46cbcb8d, 0xd9bebe67, 0x4b393972); 392 &_data_word(0xde4a4a94, 0xd44c4c98, 0xe85858b0, 0x4acfcf85); 393 &_data_word(0x6bd0d0bb, 0x2aefefc5, 0xe5aaaa4f, 0x16fbfbed); 394 &_data_word(0xc5434386, 0xd74d4d9a, 0x55333366, 0x94858511); 395 &_data_word(0xcf45458a, 0x10f9f9e9, 0x06020204, 0x817f7ffe); 396 &_data_word(0xf05050a0, 0x443c3c78, 0xba9f9f25, 0xe3a8a84b); 397 &_data_word(0xf35151a2, 0xfea3a35d, 0xc0404080, 0x8a8f8f05); 398 &_data_word(0xad92923f, 0xbc9d9d21, 0x48383870, 0x04f5f5f1); 399 &_data_word(0xdfbcbc63, 0xc1b6b677, 0x75dadaaf, 0x63212142); 400 &_data_word(0x30101020, 0x1affffe5, 0x0ef3f3fd, 0x6dd2d2bf); 401 &_data_word(0x4ccdcd81, 0x140c0c18, 0x35131326, 0x2fececc3); 402 &_data_word(0xe15f5fbe, 0xa2979735, 0xcc444488, 0x3917172e); 403 &_data_word(0x57c4c493, 0xf2a7a755, 0x827e7efc, 0x473d3d7a); 404 &_data_word(0xac6464c8, 0xe75d5dba, 0x2b191932, 0x957373e6); 405 &_data_word(0xa06060c0, 0x98818119, 0xd14f4f9e, 0x7fdcdca3); 406 &_data_word(0x66222244, 0x7e2a2a54, 0xab90903b, 0x8388880b); 407 &_data_word(0xca46468c, 0x29eeeec7, 0xd3b8b86b, 0x3c141428); 408 &_data_word(0x79dedea7, 0xe25e5ebc, 0x1d0b0b16, 0x76dbdbad); 409 &_data_word(0x3be0e0db, 0x56323264, 0x4e3a3a74, 0x1e0a0a14); 410 &_data_word(0xdb494992, 0x0a06060c, 0x6c242448, 0xe45c5cb8); 411 &_data_word(0x5dc2c29f, 0x6ed3d3bd, 0xefacac43, 0xa66262c4); 412 &_data_word(0xa8919139, 0xa4959531, 0x37e4e4d3, 0x8b7979f2); 413 &_data_word(0x32e7e7d5, 0x43c8c88b, 0x5937376e, 0xb76d6dda); 414 &_data_word(0x8c8d8d01, 0x64d5d5b1, 0xd24e4e9c, 0xe0a9a949); 415 &_data_word(0xb46c6cd8, 0xfa5656ac, 0x07f4f4f3, 0x25eaeacf); 416 &_data_word(0xaf6565ca, 0x8e7a7af4, 0xe9aeae47, 0x18080810); 417 &_data_word(0xd5baba6f, 0x887878f0, 0x6f25254a, 0x722e2e5c); 418 &_data_word(0x241c1c38, 0xf1a6a657, 0xc7b4b473, 0x51c6c697); 419 &_data_word(0x23e8e8cb, 0x7cdddda1, 0x9c7474e8, 0x211f1f3e); 420 &_data_word(0xdd4b4b96, 0xdcbdbd61, 0x868b8b0d, 0x858a8a0f); 421 &_data_word(0x907070e0, 0x423e3e7c, 0xc4b5b571, 0xaa6666cc); 422 &_data_word(0xd8484890, 0x05030306, 0x01f6f6f7, 0x120e0e1c); 423 &_data_word(0xa36161c2, 0x5f35356a, 0xf95757ae, 0xd0b9b969); 424 &_data_word(0x91868617, 0x58c1c199, 0x271d1d3a, 0xb99e9e27); 425 &_data_word(0x38e1e1d9, 0x13f8f8eb, 0xb398982b, 0x33111122); 426 &_data_word(0xbb6969d2, 0x70d9d9a9, 0x898e8e07, 0xa7949433); 427 &_data_word(0xb69b9b2d, 0x221e1e3c, 0x92878715, 0x20e9e9c9); 428 &_data_word(0x49cece87, 0xff5555aa, 0x78282850, 0x7adfdfa5); 429 &_data_word(0x8f8c8c03, 0xf8a1a159, 0x80898909, 0x170d0d1a); 430 &_data_word(0xdabfbf65, 0x31e6e6d7, 0xc6424284, 0xb86868d0); 431 &_data_word(0xc3414182, 0xb0999929, 0x772d2d5a, 0x110f0f1e); 432 &_data_word(0xcbb0b07b, 0xfc5454a8, 0xd6bbbb6d, 0x3a16162c); 433#rcon: 434 &data_word(0x00000001, 0x00000002, 0x00000004, 0x00000008); 435 &data_word(0x00000010, 0x00000020, 0x00000040, 0x00000080); 436 &data_word(0x0000001b, 0x00000036, 0, 0, 0, 0, 0, 0); 437&function_end_B("_x86_AES_encrypt"); 438 439# void AES_encrypt (const void *inp,void *out,const AES_KEY *key); 440&public_label("AES_Te"); 441&function_begin("AES_encrypt"); 442 &mov ($acc,&wparam(0)); # load inp 443 &mov ($key,&wparam(2)); # load key 444 445 &mov ($s0,"esp"); 446 &sub ("esp",24); 447 &and ("esp",-64); 448 &add ("esp",4); 449 &mov (&DWP(16,"esp"),$s0); 450 451 &call (&label("pic_point")); # make it PIC! 452 &set_label("pic_point"); 453 &blindpop("ebp"); 454 &lea ("ebp",&DWP(&label("AES_Te")."-".&label("pic_point"),"ebp")); 455 456 &mov ($s0,&DWP(0,$acc)); # load input data 457 &mov ($s1,&DWP(4,$acc)); 458 &mov ($s2,&DWP(8,$acc)); 459 &mov ($s3,&DWP(12,$acc)); 460 461 &call ("_x86_AES_encrypt"); 462 463 &mov ("esp",&DWP(16,"esp")); 464 465 &mov ($acc,&wparam(1)); # load out 466 &mov (&DWP(0,$acc),$s0); # write output data 467 &mov (&DWP(4,$acc),$s1); 468 &mov (&DWP(8,$acc),$s2); 469 &mov (&DWP(12,$acc),$s3); 470&function_end("AES_encrypt"); 471 472#------------------------------------------------------------------# 473 474sub decstep() 475{ my ($i,$td,@s) = @_; 476 my $tmp = $key; 477 my $out = $i==3?$s[0]:$acc; 478 479 # no instructions are reordered, as performance appears 480 # optimal... or rather that all attempts to reorder didn't 481 # result in better performance [which by the way is not a 482 # bit lower than ecryption]. 483 if($i==3) { &mov ($key,&DWP(12,"esp")); } 484 else { &mov ($out,$s[0]); } 485 &and ($out,0xFF); 486 &mov ($out,&DWP(0,$td,$out,8)); 487 488 if ($i==3) { $tmp=$s[1]; } 489 &movz ($tmp,&HB($s[1])); 490 &xor ($out,&DWP(3,$td,$tmp,8)); 491 492 if ($i==3) { $tmp=$s[2]; &mov ($s[1],$acc); } 493 else { &mov ($tmp,$s[2]); } 494 &shr ($tmp,16); 495 &and ($tmp,0xFF); 496 &xor ($out,&DWP(2,$td,$tmp,8)); 497 498 if ($i==3) { $tmp=$s[3]; &mov ($s[2],&DWP(8,"esp")); } 499 else { &mov ($tmp,$s[3]); } 500 &shr ($tmp,24); 501 &xor ($out,&DWP(1,$td,$tmp,8)); 502 if ($i<2) { &mov (&DWP(4+4*$i,"esp"),$out); } 503 if ($i==3) { &mov ($s[3],&DWP(4,"esp")); } 504 &comment(); 505} 506 507sub declast() 508{ my ($i,$td,@s)=@_; 509 my $tmp = $key; 510 my $out = $i==3?$s[0]:$acc; 511 512 if($i==3) { &mov ($key,&DWP(12,"esp")); } 513 else { &mov ($out,$s[0]); } 514 &and ($out,0xFF); 515 &movz ($out,&DWP(2048,$td,$out,1)); 516 517 if ($i==3) { $tmp=$s[1]; } 518 &movz ($tmp,&HB($s[1])); 519 &movz ($tmp,&DWP(2048,$td,$tmp,1)); 520 &shl ($tmp,8); 521 &xor ($out,$tmp); 522 523 if ($i==3) { $tmp=$s[2]; &mov ($s[1],$acc); } 524 else { mov ($tmp,$s[2]); } 525 &shr ($tmp,16); 526 &and ($tmp,0xFF); 527 &movz ($tmp,&DWP(2048,$td,$tmp,1)); 528 &shl ($tmp,16); 529 &xor ($out,$tmp); 530 531 if ($i==3) { $tmp=$s[3]; &mov ($s[2],&DWP(8,"esp")); } 532 else { &mov ($tmp,$s[3]); } 533 &shr ($tmp,24); 534 &movz ($tmp,&DWP(2048,$td,$tmp,1)); 535 &shl ($tmp,24); 536 &xor ($out,$tmp); 537 if ($i<2) { &mov (&DWP(4+4*$i,"esp"),$out); } 538 if ($i==3) { &mov ($s[3],&DWP(4,"esp")); } 539} 540 541&public_label("AES_Td"); 542&function_begin_B("_x86_AES_decrypt"); 543 # note that caller is expected to allocate stack frame for me! 544 &mov (&DWP(12,"esp"),$key); # save key 545 546 &xor ($s0,&DWP(0,$key)); # xor with key 547 &xor ($s1,&DWP(4,$key)); 548 &xor ($s2,&DWP(8,$key)); 549 &xor ($s3,&DWP(12,$key)); 550 551 &mov ($acc,&DWP(240,$key)); # load key->rounds 552 553 if ($small_footprint) { 554 &lea ($acc,&DWP(-2,$acc,$acc)); 555 &lea ($acc,&DWP(0,$key,$acc,8)); 556 &mov (&DWP(16,"esp"),$acc); # end of key schedule 557 &align (4); 558 &set_label("loop"); 559 &decstep(0,"ebp",$s0,$s3,$s2,$s1); 560 &decstep(1,"ebp",$s1,$s0,$s3,$s2); 561 &decstep(2,"ebp",$s2,$s1,$s0,$s3); 562 &decstep(3,"ebp",$s3,$s2,$s1,$s0); 563 &add ($key,16); # advance rd_key 564 &xor ($s0,&DWP(0,$key)); 565 &xor ($s1,&DWP(4,$key)); 566 &xor ($s2,&DWP(8,$key)); 567 &xor ($s3,&DWP(12,$key)); 568 &cmp ($key,&DWP(16,"esp")); 569 &mov (&DWP(12,"esp"),$key); 570 &jb (&label("loop")); 571 } 572 else { 573 &cmp ($acc,10); 574 &jle (&label("10rounds")); 575 &cmp ($acc,12); 576 &jle (&label("12rounds")); 577 578 &set_label("14rounds"); 579 for ($i=1;$i<3;$i++) { 580 &decstep(0,"ebp",$s0,$s3,$s2,$s1); 581 &decstep(1,"ebp",$s1,$s0,$s3,$s2); 582 &decstep(2,"ebp",$s2,$s1,$s0,$s3); 583 &decstep(3,"ebp",$s3,$s2,$s1,$s0); 584 &xor ($s0,&DWP(16*$i+0,$key)); 585 &xor ($s1,&DWP(16*$i+4,$key)); 586 &xor ($s2,&DWP(16*$i+8,$key)); 587 &xor ($s3,&DWP(16*$i+12,$key)); 588 } 589 &add ($key,32); 590 &mov (&DWP(12,"esp"),$key); # advance rd_key 591 &set_label("12rounds"); 592 for ($i=1;$i<3;$i++) { 593 &decstep(0,"ebp",$s0,$s3,$s2,$s1); 594 &decstep(1,"ebp",$s1,$s0,$s3,$s2); 595 &decstep(2,"ebp",$s2,$s1,$s0,$s3); 596 &decstep(3,"ebp",$s3,$s2,$s1,$s0); 597 &xor ($s0,&DWP(16*$i+0,$key)); 598 &xor ($s1,&DWP(16*$i+4,$key)); 599 &xor ($s2,&DWP(16*$i+8,$key)); 600 &xor ($s3,&DWP(16*$i+12,$key)); 601 } 602 &add ($key,32); 603 &mov (&DWP(12,"esp"),$key); # advance rd_key 604 &set_label("10rounds"); 605 for ($i=1;$i<10;$i++) { 606 &decstep(0,"ebp",$s0,$s3,$s2,$s1); 607 &decstep(1,"ebp",$s1,$s0,$s3,$s2); 608 &decstep(2,"ebp",$s2,$s1,$s0,$s3); 609 &decstep(3,"ebp",$s3,$s2,$s1,$s0); 610 &xor ($s0,&DWP(16*$i+0,$key)); 611 &xor ($s1,&DWP(16*$i+4,$key)); 612 &xor ($s2,&DWP(16*$i+8,$key)); 613 &xor ($s3,&DWP(16*$i+12,$key)); 614 } 615 } 616 617 &declast(0,"ebp",$s0,$s3,$s2,$s1); 618 &declast(1,"ebp",$s1,$s0,$s3,$s2); 619 &declast(2,"ebp",$s2,$s1,$s0,$s3); 620 &declast(3,"ebp",$s3,$s2,$s1,$s0); 621 622 &add ($key,$small_footprint?16:160); 623 &xor ($s0,&DWP(0,$key)); 624 &xor ($s1,&DWP(4,$key)); 625 &xor ($s2,&DWP(8,$key)); 626 &xor ($s3,&DWP(12,$key)); 627 628 &ret (); 629 630&set_label("AES_Td",64); # Yes! I keep it in the code segment! 631 &_data_word(0x50a7f451, 0x5365417e, 0xc3a4171a, 0x965e273a); 632 &_data_word(0xcb6bab3b, 0xf1459d1f, 0xab58faac, 0x9303e34b); 633 &_data_word(0x55fa3020, 0xf66d76ad, 0x9176cc88, 0x254c02f5); 634 &_data_word(0xfcd7e54f, 0xd7cb2ac5, 0x80443526, 0x8fa362b5); 635 &_data_word(0x495ab1de, 0x671bba25, 0x980eea45, 0xe1c0fe5d); 636 &_data_word(0x02752fc3, 0x12f04c81, 0xa397468d, 0xc6f9d36b); 637 &_data_word(0xe75f8f03, 0x959c9215, 0xeb7a6dbf, 0xda595295); 638 &_data_word(0x2d83bed4, 0xd3217458, 0x2969e049, 0x44c8c98e); 639 &_data_word(0x6a89c275, 0x78798ef4, 0x6b3e5899, 0xdd71b927); 640 &_data_word(0xb64fe1be, 0x17ad88f0, 0x66ac20c9, 0xb43ace7d); 641 &_data_word(0x184adf63, 0x82311ae5, 0x60335197, 0x457f5362); 642 &_data_word(0xe07764b1, 0x84ae6bbb, 0x1ca081fe, 0x942b08f9); 643 &_data_word(0x58684870, 0x19fd458f, 0x876cde94, 0xb7f87b52); 644 &_data_word(0x23d373ab, 0xe2024b72, 0x578f1fe3, 0x2aab5566); 645 &_data_word(0x0728ebb2, 0x03c2b52f, 0x9a7bc586, 0xa50837d3); 646 &_data_word(0xf2872830, 0xb2a5bf23, 0xba6a0302, 0x5c8216ed); 647 &_data_word(0x2b1ccf8a, 0x92b479a7, 0xf0f207f3, 0xa1e2694e); 648 &_data_word(0xcdf4da65, 0xd5be0506, 0x1f6234d1, 0x8afea6c4); 649 &_data_word(0x9d532e34, 0xa055f3a2, 0x32e18a05, 0x75ebf6a4); 650 &_data_word(0x39ec830b, 0xaaef6040, 0x069f715e, 0x51106ebd); 651 &_data_word(0xf98a213e, 0x3d06dd96, 0xae053edd, 0x46bde64d); 652 &_data_word(0xb58d5491, 0x055dc471, 0x6fd40604, 0xff155060); 653 &_data_word(0x24fb9819, 0x97e9bdd6, 0xcc434089, 0x779ed967); 654 &_data_word(0xbd42e8b0, 0x888b8907, 0x385b19e7, 0xdbeec879); 655 &_data_word(0x470a7ca1, 0xe90f427c, 0xc91e84f8, 0x00000000); 656 &_data_word(0x83868009, 0x48ed2b32, 0xac70111e, 0x4e725a6c); 657 &_data_word(0xfbff0efd, 0x5638850f, 0x1ed5ae3d, 0x27392d36); 658 &_data_word(0x64d90f0a, 0x21a65c68, 0xd1545b9b, 0x3a2e3624); 659 &_data_word(0xb1670a0c, 0x0fe75793, 0xd296eeb4, 0x9e919b1b); 660 &_data_word(0x4fc5c080, 0xa220dc61, 0x694b775a, 0x161a121c); 661 &_data_word(0x0aba93e2, 0xe52aa0c0, 0x43e0223c, 0x1d171b12); 662 &_data_word(0x0b0d090e, 0xadc78bf2, 0xb9a8b62d, 0xc8a91e14); 663 &_data_word(0x8519f157, 0x4c0775af, 0xbbdd99ee, 0xfd607fa3); 664 &_data_word(0x9f2601f7, 0xbcf5725c, 0xc53b6644, 0x347efb5b); 665 &_data_word(0x7629438b, 0xdcc623cb, 0x68fcedb6, 0x63f1e4b8); 666 &_data_word(0xcadc31d7, 0x10856342, 0x40229713, 0x2011c684); 667 &_data_word(0x7d244a85, 0xf83dbbd2, 0x1132f9ae, 0x6da129c7); 668 &_data_word(0x4b2f9e1d, 0xf330b2dc, 0xec52860d, 0xd0e3c177); 669 &_data_word(0x6c16b32b, 0x99b970a9, 0xfa489411, 0x2264e947); 670 &_data_word(0xc48cfca8, 0x1a3ff0a0, 0xd82c7d56, 0xef903322); 671 &_data_word(0xc74e4987, 0xc1d138d9, 0xfea2ca8c, 0x360bd498); 672 &_data_word(0xcf81f5a6, 0x28de7aa5, 0x268eb7da, 0xa4bfad3f); 673 &_data_word(0xe49d3a2c, 0x0d927850, 0x9bcc5f6a, 0x62467e54); 674 &_data_word(0xc2138df6, 0xe8b8d890, 0x5ef7392e, 0xf5afc382); 675 &_data_word(0xbe805d9f, 0x7c93d069, 0xa92dd56f, 0xb31225cf); 676 &_data_word(0x3b99acc8, 0xa77d1810, 0x6e639ce8, 0x7bbb3bdb); 677 &_data_word(0x097826cd, 0xf418596e, 0x01b79aec, 0xa89a4f83); 678 &_data_word(0x656e95e6, 0x7ee6ffaa, 0x08cfbc21, 0xe6e815ef); 679 &_data_word(0xd99be7ba, 0xce366f4a, 0xd4099fea, 0xd67cb029); 680 &_data_word(0xafb2a431, 0x31233f2a, 0x3094a5c6, 0xc066a235); 681 &_data_word(0x37bc4e74, 0xa6ca82fc, 0xb0d090e0, 0x15d8a733); 682 &_data_word(0x4a9804f1, 0xf7daec41, 0x0e50cd7f, 0x2ff69117); 683 &_data_word(0x8dd64d76, 0x4db0ef43, 0x544daacc, 0xdf0496e4); 684 &_data_word(0xe3b5d19e, 0x1b886a4c, 0xb81f2cc1, 0x7f516546); 685 &_data_word(0x04ea5e9d, 0x5d358c01, 0x737487fa, 0x2e410bfb); 686 &_data_word(0x5a1d67b3, 0x52d2db92, 0x335610e9, 0x1347d66d); 687 &_data_word(0x8c61d79a, 0x7a0ca137, 0x8e14f859, 0x893c13eb); 688 &_data_word(0xee27a9ce, 0x35c961b7, 0xede51ce1, 0x3cb1477a); 689 &_data_word(0x59dfd29c, 0x3f73f255, 0x79ce1418, 0xbf37c773); 690 &_data_word(0xeacdf753, 0x5baafd5f, 0x146f3ddf, 0x86db4478); 691 &_data_word(0x81f3afca, 0x3ec468b9, 0x2c342438, 0x5f40a3c2); 692 &_data_word(0x72c31d16, 0x0c25e2bc, 0x8b493c28, 0x41950dff); 693 &_data_word(0x7101a839, 0xdeb30c08, 0x9ce4b4d8, 0x90c15664); 694 &_data_word(0x6184cb7b, 0x70b632d5, 0x745c6c48, 0x4257b8d0); 695#Td4: 696 &data_byte(0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38); 697 &data_byte(0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb); 698 &data_byte(0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87); 699 &data_byte(0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb); 700 &data_byte(0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d); 701 &data_byte(0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e); 702 &data_byte(0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2); 703 &data_byte(0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25); 704 &data_byte(0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16); 705 &data_byte(0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92); 706 &data_byte(0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda); 707 &data_byte(0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84); 708 &data_byte(0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a); 709 &data_byte(0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06); 710 &data_byte(0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02); 711 &data_byte(0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b); 712 &data_byte(0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea); 713 &data_byte(0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73); 714 &data_byte(0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85); 715 &data_byte(0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e); 716 &data_byte(0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89); 717 &data_byte(0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b); 718 &data_byte(0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20); 719 &data_byte(0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4); 720 &data_byte(0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31); 721 &data_byte(0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f); 722 &data_byte(0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d); 723 &data_byte(0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef); 724 &data_byte(0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0); 725 &data_byte(0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61); 726 &data_byte(0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26); 727 &data_byte(0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d); 728&function_end_B("_x86_AES_decrypt"); 729 730# void AES_decrypt (const void *inp,void *out,const AES_KEY *key); 731&public_label("AES_Td"); 732&function_begin("AES_decrypt"); 733 &mov ($acc,&wparam(0)); # load inp 734 &mov ($key,&wparam(2)); # load key 735 736 &mov ($s0,"esp"); 737 &sub ("esp",24); 738 &and ("esp",-64); 739 &add ("esp",4); 740 &mov (&DWP(16,"esp"),$s0); 741 742 &call (&label("pic_point")); # make it PIC! 743 &set_label("pic_point"); 744 &blindpop("ebp"); 745 &lea ("ebp",&DWP(&label("AES_Td")."-".&label("pic_point"),"ebp")); 746 747 # prefetch Td4 748 &lea ("ebp",&DWP(2048+128,"ebp")); 749 &mov ($s0,&DWP(0-128,"ebp")); 750 &mov ($s1,&DWP(32-128,"ebp")); 751 &mov ($s2,&DWP(64-128,"ebp")); 752 &mov ($s3,&DWP(96-128,"ebp")); 753 &mov ($s0,&DWP(128-128,"ebp")); 754 &mov ($s1,&DWP(160-128,"ebp")); 755 &mov ($s2,&DWP(192-128,"ebp")); 756 &mov ($s3,&DWP(224-128,"ebp")); 757 &lea ("ebp",&DWP(-2048-128,"ebp")); 758 759 &mov ($s0,&DWP(0,$acc)); # load input data 760 &mov ($s1,&DWP(4,$acc)); 761 &mov ($s2,&DWP(8,$acc)); 762 &mov ($s3,&DWP(12,$acc)); 763 764 &call ("_x86_AES_decrypt"); 765 766 &mov ("esp",&DWP(16,"esp")); 767 768 &mov ($acc,&wparam(1)); # load out 769 &mov (&DWP(0,$acc),$s0); # write output data 770 &mov (&DWP(4,$acc),$s1); 771 &mov (&DWP(8,$acc),$s2); 772 &mov (&DWP(12,$acc),$s3); 773&function_end("AES_decrypt"); 774 775# void AES_cbc_encrypt (const void char *inp, unsigned char *out, 776# size_t length, const AES_KEY *key, 777# unsigned char *ivp,const int enc); 778{ 779# stack frame layout 780# -4(%esp) 0(%esp) return address 781# 0(%esp) 4(%esp) tmp1 782# 4(%esp) 8(%esp) tmp2 783# 8(%esp) 12(%esp) key 784# 12(%esp) 16(%esp) end of key schedule 785my $_esp=&DWP(16,"esp"); #saved %esp 786my $_inp=&DWP(20,"esp"); #copy of wparam(0) 787my $_out=&DWP(24,"esp"); #copy of wparam(1) 788my $_len=&DWP(28,"esp"); #copy of wparam(2) 789my $_key=&DWP(32,"esp"); #copy of wparam(3) 790my $_ivp=&DWP(36,"esp"); #copy of wparam(4) 791my $_tmp=&DWP(40,"esp"); #volatile variable 792my $ivec=&DWP(44,"esp"); #ivec[16] 793my $aes_key=&DWP(60,"esp"); #copy of aes_key 794my $mark=&DWP(60+240,"esp"); #copy of aes_key->rounds 795 796&public_label("AES_Te"); 797&public_label("AES_Td"); 798&function_begin("AES_cbc_encrypt"); 799 &mov ($s2 eq "ecx"? $s2 : "",&wparam(2)); # load len 800 &cmp ($s2,0); 801 &je (&label("enc_out")); 802 803 &call (&label("pic_point")); # make it PIC! 804 &set_label("pic_point"); 805 &blindpop("ebp"); 806 807 &pushf (); 808 &cld (); 809 810 &cmp (&wparam(5),0); 811 &je (&label("DECRYPT")); 812 813 &lea ("ebp",&DWP(&label("AES_Te")."-".&label("pic_point"),"ebp")); 814 815 # allocate aligned stack frame... 816 &lea ($key,&DWP(-64-244,"esp")); 817 &and ($key,-64); 818 819 # ... and make sure it doesn't alias with AES_Te modulo 4096 820 &mov ($s0,"ebp"); 821 &lea ($s1,&DWP(2048,"ebp")); 822 &mov ($s3,$key); 823 &and ($s0,0xfff); # s = %ebp&0xfff 824 &and ($s1,0xfff); # e = (%ebp+2048)&0xfff 825 &and ($s3,0xfff); # p = %esp&0xfff 826 827 &cmp ($s3,$s1); # if (p>=e) %esp =- (p-e); 828 &jb (&label("te_break_out")); 829 &sub ($s3,$s1); 830 &sub ($key,$s3); 831 &jmp (&label("te_ok")); 832 &set_label("te_break_out"); # else %esp -= (p-s)&0xfff + framesz; 833 &sub ($s3,$s0); 834 &and ($s3,0xfff); 835 &add ($s3,64+256); 836 &sub ($key,$s3); 837 &align (4); 838 &set_label("te_ok"); 839 840 &mov ($s0,&wparam(0)); # load inp 841 &mov ($s1,&wparam(1)); # load out 842 &mov ($s3,&wparam(3)); # load key 843 &mov ($acc,&wparam(4)); # load ivp 844 845 &exch ("esp",$key); 846 &add ("esp",4); # reserve for return address! 847 &mov ($_esp,$key); # save %esp 848 849 &mov ($_inp,$s0); # save copy of inp 850 &mov ($_out,$s1); # save copy of out 851 &mov ($_len,$s2); # save copy of len 852 &mov ($_key,$s3); # save copy of key 853 &mov ($_ivp,$acc); # save copy of ivp 854 855 &mov ($mark,0); # copy of aes_key->rounds = 0; 856 if ($compromise) { 857 &cmp ($s2,$compromise); 858 &jb (&label("skip_ecopy")); 859 } 860 # do we copy key schedule to stack? 861 &mov ($s1 eq "ebx" ? $s1 : "",$s3); 862 &mov ($s2 eq "ecx" ? $s2 : "",244/4); 863 &sub ($s1,"ebp"); 864 &mov ("esi",$s3); 865 &and ($s1,0xfff); 866 &lea ("edi",$aes_key); 867 &cmp ($s1,2048); 868 &jb (&label("do_ecopy")); 869 &cmp ($s1,4096-244); 870 &jb (&label("skip_ecopy")); 871 &align (4); 872 &set_label("do_ecopy"); 873 &mov ($_key,"edi"); 874 &data_word(0xA5F3F689); # rep movsd 875 &set_label("skip_ecopy"); 876 877 &mov ($acc,$s0); 878 &mov ($key,16); 879 &align (4); 880 &set_label("prefetch_te"); 881 &mov ($s0,&DWP(0,"ebp")); 882 &mov ($s1,&DWP(32,"ebp")); 883 &mov ($s2,&DWP(64,"ebp")); 884 &mov ($s3,&DWP(96,"ebp")); 885 &lea ("ebp",&DWP(128,"ebp")); 886 &dec ($key); 887 &jnz (&label("prefetch_te")); 888 &sub ("ebp",2048); 889 890 &mov ($s2,$_len); 891 &mov ($key,$_ivp); 892 &test ($s2,0xFFFFFFF0); 893 &jz (&label("enc_tail")); # short input... 894 895 &mov ($s0,&DWP(0,$key)); # load iv 896 &mov ($s1,&DWP(4,$key)); 897 898 &align (4); 899 &set_label("enc_loop"); 900 &mov ($s2,&DWP(8,$key)); 901 &mov ($s3,&DWP(12,$key)); 902 903 &xor ($s0,&DWP(0,$acc)); # xor input data 904 &xor ($s1,&DWP(4,$acc)); 905 &xor ($s2,&DWP(8,$acc)); 906 &xor ($s3,&DWP(12,$acc)); 907 908 &mov ($key,$_key); # load key 909 &call ("_x86_AES_encrypt"); 910 911 &mov ($acc,$_inp); # load inp 912 &mov ($key,$_out); # load out 913 914 &mov (&DWP(0,$key),$s0); # save output data 915 &mov (&DWP(4,$key),$s1); 916 &mov (&DWP(8,$key),$s2); 917 &mov (&DWP(12,$key),$s3); 918 919 &mov ($s2,$_len); # load len 920 921 &lea ($acc,&DWP(16,$acc)); 922 &mov ($_inp,$acc); # save inp 923 924 &lea ($s3,&DWP(16,$key)); 925 &mov ($_out,$s3); # save out 926 927 &sub ($s2,16); 928 &test ($s2,0xFFFFFFF0); 929 &mov ($_len,$s2); # save len 930 &jnz (&label("enc_loop")); 931 &test ($s2,15); 932 &jnz (&label("enc_tail")); 933 &mov ($acc,$_ivp); # load ivp 934 &mov ($s2,&DWP(8,$key)); # restore last dwords 935 &mov ($s3,&DWP(12,$key)); 936 &mov (&DWP(0,$acc),$s0); # save ivec 937 &mov (&DWP(4,$acc),$s1); 938 &mov (&DWP(8,$acc),$s2); 939 &mov (&DWP(12,$acc),$s3); 940 941 &cmp ($mark,0); # was the key schedule copied? 942 &mov ("edi",$_key); 943 &mov ("esp",$_esp); 944 &je (&label("skip_ezero")); 945 # zero copy of key schedule 946 &mov ("ecx",240/4); 947 &xor ("eax","eax"); 948 &align (4); 949 &data_word(0xABF3F689); # rep stosd 950 &set_label("skip_ezero") 951 &popf (); 952 &set_label("enc_out"); 953 &function_end_A(); 954 &pushf (); # kludge, never executed 955 956 &align (4); 957 &set_label("enc_tail"); 958 &push ($key eq "edi" ? $key : ""); # push ivp 959 &mov ($key,$_out); # load out 960 &mov ($s1,16); 961 &sub ($s1,$s2); 962 &cmp ($key,$acc); # compare with inp 963 &je (&label("enc_in_place")); 964 &align (4); 965 &data_word(0xA4F3F689); # rep movsb # copy input 966 &jmp (&label("enc_skip_in_place")); 967 &set_label("enc_in_place"); 968 &lea ($key,&DWP(0,$key,$s2)); 969 &set_label("enc_skip_in_place"); 970 &mov ($s2,$s1); 971 &xor ($s0,$s0); 972 &align (4); 973 &data_word(0xAAF3F689); # rep stosb # zero tail 974 &pop ($key); # pop ivp 975 976 &mov ($acc,$_out); # output as input 977 &mov ($s0,&DWP(0,$key)); 978 &mov ($s1,&DWP(4,$key)); 979 &mov ($_len,16); # len=16 980 &jmp (&label("enc_loop")); # one more spin... 981 982#----------------------------- DECRYPT -----------------------------# 983&align (4); 984&set_label("DECRYPT"); 985 &lea ("ebp",&DWP(&label("AES_Td")."-".&label("pic_point"),"ebp")); 986 987 # allocate aligned stack frame... 988 &lea ($key,&DWP(-64-244,"esp")); 989 &and ($key,-64); 990 991 # ... and make sure it doesn't alias with AES_Td modulo 4096 992 &mov ($s0,"ebp"); 993 &lea ($s1,&DWP(2048+256,"ebp")); 994 &mov ($s3,$key); 995 &and ($s0,0xfff); # s = %ebp&0xfff 996 &and ($s1,0xfff); # e = (%ebp+2048+256)&0xfff 997 &and ($s3,0xfff); # p = %esp&0xfff 998 999 &cmp ($s3,$s1); # if (p>=e) %esp =- (p-e); 1000 &jb (&label("td_break_out")); 1001 &sub ($s3,$s1); 1002 &sub ($key,$s3); 1003 &jmp (&label("td_ok")); 1004 &set_label("td_break_out"); # else %esp -= (p-s)&0xfff + framesz; 1005 &sub ($s3,$s0); 1006 &and ($s3,0xfff); 1007 &add ($s3,64+256); 1008 &sub ($key,$s3); 1009 &align (4); 1010 &set_label("td_ok"); 1011 1012 &mov ($s0,&wparam(0)); # load inp 1013 &mov ($s1,&wparam(1)); # load out 1014 &mov ($s3,&wparam(3)); # load key 1015 &mov ($acc,&wparam(4)); # load ivp 1016 1017 &exch ("esp",$key); 1018 &add ("esp",4); # reserve for return address! 1019 &mov ($_esp,$key); # save %esp 1020 1021 &mov ($_inp,$s0); # save copy of inp 1022 &mov ($_out,$s1); # save copy of out 1023 &mov ($_len,$s2); # save copy of len 1024 &mov ($_key,$s3); # save copy of key 1025 &mov ($_ivp,$acc); # save copy of ivp 1026 1027 &mov ($mark,0); # copy of aes_key->rounds = 0; 1028 if ($compromise) { 1029 &cmp ($s2,$compromise); 1030 &jb (&label("skip_dcopy")); 1031 } 1032 # do we copy key schedule to stack? 1033 &mov ($s1 eq "ebx" ? $s1 : "",$s3); 1034 &mov ($s2 eq "ecx" ? $s2 : "",244/4); 1035 &sub ($s1,"ebp"); 1036 &mov ("esi",$s3); 1037 &and ($s1,0xfff); 1038 &lea ("edi",$aes_key); 1039 &cmp ($s1,2048+256); 1040 &jb (&label("do_dcopy")); 1041 &cmp ($s1,4096-244); 1042 &jb (&label("skip_dcopy")); 1043 &align (4); 1044 &set_label("do_dcopy"); 1045 &mov ($_key,"edi"); 1046 &data_word(0xA5F3F689); # rep movsd 1047 &set_label("skip_dcopy"); 1048 1049 &mov ($acc,$s0); 1050 &mov ($key,18); 1051 &align (4); 1052 &set_label("prefetch_td"); 1053 &mov ($s0,&DWP(0,"ebp")); 1054 &mov ($s1,&DWP(32,"ebp")); 1055 &mov ($s2,&DWP(64,"ebp")); 1056 &mov ($s3,&DWP(96,"ebp")); 1057 &lea ("ebp",&DWP(128,"ebp")); 1058 &dec ($key); 1059 &jnz (&label("prefetch_td")); 1060 &sub ("ebp",2048+256); 1061 1062 &cmp ($acc,$_out); 1063 &je (&label("dec_in_place")); # in-place processing... 1064 1065 &mov ($key,$_ivp); # load ivp 1066 &mov ($_tmp,$key); 1067 1068 &align (4); 1069 &set_label("dec_loop"); 1070 &mov ($s0,&DWP(0,$acc)); # read input 1071 &mov ($s1,&DWP(4,$acc)); 1072 &mov ($s2,&DWP(8,$acc)); 1073 &mov ($s3,&DWP(12,$acc)); 1074 1075 &mov ($key,$_key); # load key 1076 &call ("_x86_AES_decrypt"); 1077 1078 &mov ($key,$_tmp); # load ivp 1079 &mov ($acc,$_len); # load len 1080 &xor ($s0,&DWP(0,$key)); # xor iv 1081 &xor ($s1,&DWP(4,$key)); 1082 &xor ($s2,&DWP(8,$key)); 1083 &xor ($s3,&DWP(12,$key)); 1084 1085 &sub ($acc,16); 1086 &jc (&label("dec_partial")); 1087 &mov ($_len,$acc); # save len 1088 &mov ($acc,$_inp); # load inp 1089 &mov ($key,$_out); # load out 1090 1091 &mov (&DWP(0,$key),$s0); # write output 1092 &mov (&DWP(4,$key),$s1); 1093 &mov (&DWP(8,$key),$s2); 1094 &mov (&DWP(12,$key),$s3); 1095 1096 &mov ($_tmp,$acc); # save ivp 1097 &lea ($acc,&DWP(16,$acc)); 1098 &mov ($_inp,$acc); # save inp 1099 1100 &lea ($key,&DWP(16,$key)); 1101 &mov ($_out,$key); # save out 1102 1103 &jnz (&label("dec_loop")); 1104 &mov ($key,$_tmp); # load temp ivp 1105 &set_label("dec_end"); 1106 &mov ($acc,$_ivp); # load user ivp 1107 &mov ($s0,&DWP(0,$key)); # load iv 1108 &mov ($s1,&DWP(4,$key)); 1109 &mov ($s2,&DWP(8,$key)); 1110 &mov ($s3,&DWP(12,$key)); 1111 &mov (&DWP(0,$acc),$s0); # copy back to user 1112 &mov (&DWP(4,$acc),$s1); 1113 &mov (&DWP(8,$acc),$s2); 1114 &mov (&DWP(12,$acc),$s3); 1115 &jmp (&label("dec_out")); 1116 1117 &align (4); 1118 &set_label("dec_partial"); 1119 &lea ($key,$ivec); 1120 &mov (&DWP(0,$key),$s0); # dump output to stack 1121 &mov (&DWP(4,$key),$s1); 1122 &mov (&DWP(8,$key),$s2); 1123 &mov (&DWP(12,$key),$s3); 1124 &lea ($s2 eq "ecx" ? $s2 : "",&DWP(16,$acc)); 1125 &mov ($acc eq "esi" ? $acc : "",$key); 1126 &mov ($key eq "edi" ? $key : "",$_out); # load out 1127 &data_word(0xA4F3F689); # rep movsb # copy output 1128 &mov ($key,$_inp); # use inp as temp ivp 1129 &jmp (&label("dec_end")); 1130 1131 &align (4); 1132 &set_label("dec_in_place"); 1133 &set_label("dec_in_place_loop"); 1134 &lea ($key,$ivec); 1135 &mov ($s0,&DWP(0,$acc)); # read input 1136 &mov ($s1,&DWP(4,$acc)); 1137 &mov ($s2,&DWP(8,$acc)); 1138 &mov ($s3,&DWP(12,$acc)); 1139 1140 &mov (&DWP(0,$key),$s0); # copy to temp 1141 &mov (&DWP(4,$key),$s1); 1142 &mov (&DWP(8,$key),$s2); 1143 &mov (&DWP(12,$key),$s3); 1144 1145 &mov ($key,$_key); # load key 1146 &call ("_x86_AES_decrypt"); 1147 1148 &mov ($key,$_ivp); # load ivp 1149 &mov ($acc,$_out); # load out 1150 &xor ($s0,&DWP(0,$key)); # xor iv 1151 &xor ($s1,&DWP(4,$key)); 1152 &xor ($s2,&DWP(8,$key)); 1153 &xor ($s3,&DWP(12,$key)); 1154 1155 &mov (&DWP(0,$acc),$s0); # write output 1156 &mov (&DWP(4,$acc),$s1); 1157 &mov (&DWP(8,$acc),$s2); 1158 &mov (&DWP(12,$acc),$s3); 1159 1160 &lea ($acc,&DWP(16,$acc)); 1161 &mov ($_out,$acc); # save out 1162 1163 &lea ($acc,$ivec); 1164 &mov ($s0,&DWP(0,$acc)); # read temp 1165 &mov ($s1,&DWP(4,$acc)); 1166 &mov ($s2,&DWP(8,$acc)); 1167 &mov ($s3,&DWP(12,$acc)); 1168 1169 &mov (&DWP(0,$key),$s0); # copy iv 1170 &mov (&DWP(4,$key),$s1); 1171 &mov (&DWP(8,$key),$s2); 1172 &mov (&DWP(12,$key),$s3); 1173 1174 &mov ($acc,$_inp); # load inp 1175 1176 &lea ($acc,&DWP(16,$acc)); 1177 &mov ($_inp,$acc); # save inp 1178 1179 &mov ($s2,$_len); # load len 1180 &sub ($s2,16); 1181 &jc (&label("dec_in_place_partial")); 1182 &mov ($_len,$s2); # save len 1183 &jnz (&label("dec_in_place_loop")); 1184 &jmp (&label("dec_out")); 1185 1186 &align (4); 1187 &set_label("dec_in_place_partial"); 1188 # one can argue if this is actually required... 1189 &mov ($key eq "edi" ? $key : "",$_out); 1190 &lea ($acc eq "esi" ? $acc : "",$ivec); 1191 &lea ($key,&DWP(0,$key,$s2)); 1192 &lea ($acc,&DWP(16,$acc,$s2)); 1193 &neg ($s2 eq "ecx" ? $s2 : ""); 1194 &data_word(0xA4F3F689); # rep movsb # restore tail 1195 1196 &align (4); 1197 &set_label("dec_out"); 1198 &cmp ($mark,0); # was the key schedule copied? 1199 &mov ("edi",$_key); 1200 &mov ("esp",$_esp); 1201 &je (&label("skip_dzero")); 1202 # zero copy of key schedule 1203 &mov ("ecx",240/4); 1204 &xor ("eax","eax"); 1205 &align (4); 1206 &data_word(0xABF3F689); # rep stosd 1207 &set_label("skip_dzero") 1208 &popf (); 1209&function_end("AES_cbc_encrypt"); 1210} 1211 1212#------------------------------------------------------------------# 1213 1214sub enckey() 1215{ 1216 &movz ("esi",&LB("edx")); # rk[i]>>0 1217 &mov ("ebx",&DWP(2,"ebp","esi",8)); 1218 &movz ("esi",&HB("edx")); # rk[i]>>8 1219 &and ("ebx",0xFF000000); 1220 &xor ("eax","ebx"); 1221 1222 &mov ("ebx",&DWP(2,"ebp","esi",8)); 1223 &shr ("edx",16); 1224 &and ("ebx",0x000000FF); 1225 &movz ("esi",&LB("edx")); # rk[i]>>16 1226 &xor ("eax","ebx"); 1227 1228 &mov ("ebx",&DWP(0,"ebp","esi",8)); 1229 &movz ("esi",&HB("edx")); # rk[i]>>24 1230 &and ("ebx",0x0000FF00); 1231 &xor ("eax","ebx"); 1232 1233 &mov ("ebx",&DWP(0,"ebp","esi",8)); 1234 &and ("ebx",0x00FF0000); 1235 &xor ("eax","ebx"); 1236 1237 &xor ("eax",&DWP(2048,"ebp","ecx",4)); # rcon 1238} 1239 1240# int AES_set_encrypt_key(const unsigned char *userKey, const int bits, 1241# AES_KEY *key) 1242&public_label("AES_Te"); 1243&function_begin("AES_set_encrypt_key"); 1244 &mov ("esi",&wparam(0)); # user supplied key 1245 &mov ("edi",&wparam(2)); # private key schedule 1246 1247 &test ("esi",-1); 1248 &jz (&label("badpointer")); 1249 &test ("edi",-1); 1250 &jz (&label("badpointer")); 1251 1252 &call (&label("pic_point")); 1253 &set_label("pic_point"); 1254 &blindpop("ebp"); 1255 &lea ("ebp",&DWP(&label("AES_Te")."-".&label("pic_point"),"ebp")); 1256 1257 &mov ("ecx",&wparam(1)); # number of bits in key 1258 &cmp ("ecx",128); 1259 &je (&label("10rounds")); 1260 &cmp ("ecx",192); 1261 &je (&label("12rounds")); 1262 &cmp ("ecx",256); 1263 &je (&label("14rounds")); 1264 &mov ("eax",-2); # invalid number of bits 1265 &jmp (&label("exit")); 1266 1267 &set_label("10rounds"); 1268 &mov ("eax",&DWP(0,"esi")); # copy first 4 dwords 1269 &mov ("ebx",&DWP(4,"esi")); 1270 &mov ("ecx",&DWP(8,"esi")); 1271 &mov ("edx",&DWP(12,"esi")); 1272 &mov (&DWP(0,"edi"),"eax"); 1273 &mov (&DWP(4,"edi"),"ebx"); 1274 &mov (&DWP(8,"edi"),"ecx"); 1275 &mov (&DWP(12,"edi"),"edx"); 1276 1277 &xor ("ecx","ecx"); 1278 &jmp (&label("10shortcut")); 1279 1280 &align (4); 1281 &set_label("10loop"); 1282 &mov ("eax",&DWP(0,"edi")); # rk[0] 1283 &mov ("edx",&DWP(12,"edi")); # rk[3] 1284 &set_label("10shortcut"); 1285 &enckey (); 1286 1287 &mov (&DWP(16,"edi"),"eax"); # rk[4] 1288 &xor ("eax",&DWP(4,"edi")); 1289 &mov (&DWP(20,"edi"),"eax"); # rk[5] 1290 &xor ("eax",&DWP(8,"edi")); 1291 &mov (&DWP(24,"edi"),"eax"); # rk[6] 1292 &xor ("eax",&DWP(12,"edi")); 1293 &mov (&DWP(28,"edi"),"eax"); # rk[7] 1294 &inc ("ecx"); 1295 &add ("edi",16); 1296 &cmp ("ecx",10); 1297 &jl (&label("10loop")); 1298 1299 &mov (&DWP(80,"edi"),10); # setup number of rounds 1300 &xor ("eax","eax"); 1301 &jmp (&label("exit")); 1302 1303 &set_label("12rounds"); 1304 &mov ("eax",&DWP(0,"esi")); # copy first 6 dwords 1305 &mov ("ebx",&DWP(4,"esi")); 1306 &mov ("ecx",&DWP(8,"esi")); 1307 &mov ("edx",&DWP(12,"esi")); 1308 &mov (&DWP(0,"edi"),"eax"); 1309 &mov (&DWP(4,"edi"),"ebx"); 1310 &mov (&DWP(8,"edi"),"ecx"); 1311 &mov (&DWP(12,"edi"),"edx"); 1312 &mov ("ecx",&DWP(16,"esi")); 1313 &mov ("edx",&DWP(20,"esi")); 1314 &mov (&DWP(16,"edi"),"ecx"); 1315 &mov (&DWP(20,"edi"),"edx"); 1316 1317 &xor ("ecx","ecx"); 1318 &jmp (&label("12shortcut")); 1319 1320 &align (4); 1321 &set_label("12loop"); 1322 &mov ("eax",&DWP(0,"edi")); # rk[0] 1323 &mov ("edx",&DWP(20,"edi")); # rk[5] 1324 &set_label("12shortcut"); 1325 &enckey (); 1326 1327 &mov (&DWP(24,"edi"),"eax"); # rk[6] 1328 &xor ("eax",&DWP(4,"edi")); 1329 &mov (&DWP(28,"edi"),"eax"); # rk[7] 1330 &xor ("eax",&DWP(8,"edi")); 1331 &mov (&DWP(32,"edi"),"eax"); # rk[8] 1332 &xor ("eax",&DWP(12,"edi")); 1333 &mov (&DWP(36,"edi"),"eax"); # rk[9] 1334 1335 &cmp ("ecx",7); 1336 &je (&label("12break")); 1337 &inc ("ecx"); 1338 1339 &xor ("eax",&DWP(16,"edi")); 1340 &mov (&DWP(40,"edi"),"eax"); # rk[10] 1341 &xor ("eax",&DWP(20,"edi")); 1342 &mov (&DWP(44,"edi"),"eax"); # rk[11] 1343 1344 &add ("edi",24); 1345 &jmp (&label("12loop")); 1346 1347 &set_label("12break"); 1348 &mov (&DWP(72,"edi"),12); # setup number of rounds 1349 &xor ("eax","eax"); 1350 &jmp (&label("exit")); 1351 1352 &set_label("14rounds"); 1353 &mov ("eax",&DWP(0,"esi")); # copy first 8 dwords 1354 &mov ("ebx",&DWP(4,"esi")); 1355 &mov ("ecx",&DWP(8,"esi")); 1356 &mov ("edx",&DWP(12,"esi")); 1357 &mov (&DWP(0,"edi"),"eax"); 1358 &mov (&DWP(4,"edi"),"ebx"); 1359 &mov (&DWP(8,"edi"),"ecx"); 1360 &mov (&DWP(12,"edi"),"edx"); 1361 &mov ("eax",&DWP(16,"esi")); 1362 &mov ("ebx",&DWP(20,"esi")); 1363 &mov ("ecx",&DWP(24,"esi")); 1364 &mov ("edx",&DWP(28,"esi")); 1365 &mov (&DWP(16,"edi"),"eax"); 1366 &mov (&DWP(20,"edi"),"ebx"); 1367 &mov (&DWP(24,"edi"),"ecx"); 1368 &mov (&DWP(28,"edi"),"edx"); 1369 1370 &xor ("ecx","ecx"); 1371 &jmp (&label("14shortcut")); 1372 1373 &align (4); 1374 &set_label("14loop"); 1375 &mov ("edx",&DWP(28,"edi")); # rk[7] 1376 &set_label("14shortcut"); 1377 &mov ("eax",&DWP(0,"edi")); # rk[0] 1378 1379 &enckey (); 1380 1381 &mov (&DWP(32,"edi"),"eax"); # rk[8] 1382 &xor ("eax",&DWP(4,"edi")); 1383 &mov (&DWP(36,"edi"),"eax"); # rk[9] 1384 &xor ("eax",&DWP(8,"edi")); 1385 &mov (&DWP(40,"edi"),"eax"); # rk[10] 1386 &xor ("eax",&DWP(12,"edi")); 1387 &mov (&DWP(44,"edi"),"eax"); # rk[11] 1388 1389 &cmp ("ecx",6); 1390 &je (&label("14break")); 1391 &inc ("ecx"); 1392 1393 &mov ("edx","eax"); 1394 &mov ("eax",&DWP(16,"edi")); # rk[4] 1395 &movz ("esi",&LB("edx")); # rk[11]>>0 1396 &mov ("ebx",&DWP(2,"ebp","esi",8)); 1397 &movz ("esi",&HB("edx")); # rk[11]>>8 1398 &and ("ebx",0x000000FF); 1399 &xor ("eax","ebx"); 1400 1401 &mov ("ebx",&DWP(0,"ebp","esi",8)); 1402 &shr ("edx",16); 1403 &and ("ebx",0x0000FF00); 1404 &movz ("esi",&LB("edx")); # rk[11]>>16 1405 &xor ("eax","ebx"); 1406 1407 &mov ("ebx",&DWP(0,"ebp","esi",8)); 1408 &movz ("esi",&HB("edx")); # rk[11]>>24 1409 &and ("ebx",0x00FF0000); 1410 &xor ("eax","ebx"); 1411 1412 &mov ("ebx",&DWP(2,"ebp","esi",8)); 1413 &and ("ebx",0xFF000000); 1414 &xor ("eax","ebx"); 1415 1416 &mov (&DWP(48,"edi"),"eax"); # rk[12] 1417 &xor ("eax",&DWP(20,"edi")); 1418 &mov (&DWP(52,"edi"),"eax"); # rk[13] 1419 &xor ("eax",&DWP(24,"edi")); 1420 &mov (&DWP(56,"edi"),"eax"); # rk[14] 1421 &xor ("eax",&DWP(28,"edi")); 1422 &mov (&DWP(60,"edi"),"eax"); # rk[15] 1423 1424 &add ("edi",32); 1425 &jmp (&label("14loop")); 1426 1427 &set_label("14break"); 1428 &mov (&DWP(48,"edi"),14); # setup number of rounds 1429 &xor ("eax","eax"); 1430 &jmp (&label("exit")); 1431 1432 &set_label("badpointer"); 1433 &mov ("eax",-1); 1434 &set_label("exit"); 1435&function_end("AES_set_encrypt_key"); 1436 1437sub deckey() 1438{ my ($i,$ptr,$te,$td) = @_; 1439 1440 &mov ("eax",&DWP($i,$ptr)); 1441 &mov ("edx","eax"); 1442 &movz ("ebx",&HB("eax")); 1443 &shr ("edx",16); 1444 &and ("eax",0xFF); 1445 &movz ("eax",&BP(2,$te,"eax",8)); 1446 &movz ("ebx",&BP(2,$te,"ebx",8)); 1447 &mov ("eax",&DWP(0,$td,"eax",8)); 1448 &xor ("eax",&DWP(3,$td,"ebx",8)); 1449 &movz ("ebx",&HB("edx")); 1450 &and ("edx",0xFF); 1451 &movz ("edx",&BP(2,$te,"edx",8)); 1452 &movz ("ebx",&BP(2,$te,"ebx",8)); 1453 &xor ("eax",&DWP(2,$td,"edx",8)); 1454 &xor ("eax",&DWP(1,$td,"ebx",8)); 1455 &mov (&DWP($i,$ptr),"eax"); 1456} 1457 1458# int AES_set_decrypt_key(const unsigned char *userKey, const int bits, 1459# AES_KEY *key) 1460&public_label("AES_Td"); 1461&public_label("AES_Te"); 1462&function_begin_B("AES_set_decrypt_key"); 1463 &mov ("eax",&wparam(0)); 1464 &mov ("ecx",&wparam(1)); 1465 &mov ("edx",&wparam(2)); 1466 &sub ("esp",12); 1467 &mov (&DWP(0,"esp"),"eax"); 1468 &mov (&DWP(4,"esp"),"ecx"); 1469 &mov (&DWP(8,"esp"),"edx"); 1470 &call ("AES_set_encrypt_key"); 1471 &add ("esp",12); 1472 &cmp ("eax",0); 1473 &je (&label("proceed")); 1474 &ret (); 1475 1476 &set_label("proceed"); 1477 &push ("ebp"); 1478 &push ("ebx"); 1479 &push ("esi"); 1480 &push ("edi"); 1481 1482 &mov ("esi",&wparam(2)); 1483 &mov ("ecx",&DWP(240,"esi")); # pull number of rounds 1484 &lea ("ecx",&DWP(0,"","ecx",4)); 1485 &lea ("edi",&DWP(0,"esi","ecx",4)); # pointer to last chunk 1486 1487 &align (4); 1488 &set_label("invert"); # invert order of chunks 1489 &mov ("eax",&DWP(0,"esi")); 1490 &mov ("ebx",&DWP(4,"esi")); 1491 &mov ("ecx",&DWP(0,"edi")); 1492 &mov ("edx",&DWP(4,"edi")); 1493 &mov (&DWP(0,"edi"),"eax"); 1494 &mov (&DWP(4,"edi"),"ebx"); 1495 &mov (&DWP(0,"esi"),"ecx"); 1496 &mov (&DWP(4,"esi"),"edx"); 1497 &mov ("eax",&DWP(8,"esi")); 1498 &mov ("ebx",&DWP(12,"esi")); 1499 &mov ("ecx",&DWP(8,"edi")); 1500 &mov ("edx",&DWP(12,"edi")); 1501 &mov (&DWP(8,"edi"),"eax"); 1502 &mov (&DWP(12,"edi"),"ebx"); 1503 &mov (&DWP(8,"esi"),"ecx"); 1504 &mov (&DWP(12,"esi"),"edx"); 1505 &add ("esi",16); 1506 &sub ("edi",16); 1507 &cmp ("esi","edi"); 1508 &jne (&label("invert")); 1509 1510 &call (&label("pic_point")); 1511 &set_label("pic_point"); 1512 blindpop("ebp"); 1513 &lea ("edi",&DWP(&label("AES_Td")."-".&label("pic_point"),"ebp")); 1514 &lea ("ebp",&DWP(&label("AES_Te")."-".&label("pic_point"),"ebp")); 1515 1516 &mov ("esi",&wparam(2)); 1517 &mov ("ecx",&DWP(240,"esi")); # pull number of rounds 1518 &dec ("ecx"); 1519 &align (4); 1520 &set_label("permute"); # permute the key schedule 1521 &add ("esi",16); 1522 &deckey (0,"esi","ebp","edi"); 1523 &deckey (4,"esi","ebp","edi"); 1524 &deckey (8,"esi","ebp","edi"); 1525 &deckey (12,"esi","ebp","edi"); 1526 &dec ("ecx"); 1527 &jnz (&label("permute")); 1528 1529 &xor ("eax","eax"); # return success 1530&function_end("AES_set_decrypt_key"); 1531 1532&asm_finish(); 1533