1160814Ssimon#!/usr/bin/env perl 2160814Ssimon# 3160814Ssimon# ==================================================================== 4160814Ssimon# Written by Andy Polyakov <appro@fy.chalmers.se> for the OpenSSL 5160814Ssimon# project. Rights for redistribution and usage in source and binary 6160814Ssimon# forms are granted according to the OpenSSL license. 7160814Ssimon# ==================================================================== 8160814Ssimon# 9162911Ssimon# Version 3.6. 10160814Ssimon# 11160814Ssimon# You might fail to appreciate this module performance from the first 12160814Ssimon# try. If compared to "vanilla" linux-ia32-icc target, i.e. considered 13160814Ssimon# to be *the* best Intel C compiler without -KPIC, performance appears 14160814Ssimon# to be virtually identical... But try to re-configure with shared 15160814Ssimon# library support... Aha! Intel compiler "suddenly" lags behind by 30% 16160814Ssimon# [on P4, more on others]:-) And if compared to position-independent 17160814Ssimon# code generated by GNU C, this code performs *more* than *twice* as 18160814Ssimon# fast! Yes, all this buzz about PIC means that unlike other hand- 19160814Ssimon# coded implementations, this one was explicitly designed to be safe 20160814Ssimon# to use even in shared library context... This also means that this 21160814Ssimon# code isn't necessarily absolutely fastest "ever," because in order 22160814Ssimon# to achieve position independence an extra register has to be 23160814Ssimon# off-loaded to stack, which affects the benchmark result. 24160814Ssimon# 25160814Ssimon# Special note about instruction choice. Do you recall RC4_INT code 26160814Ssimon# performing poorly on P4? It might be the time to figure out why. 27160814Ssimon# RC4_INT code implies effective address calculations in base+offset*4 28160814Ssimon# form. Trouble is that it seems that offset scaling turned to be 29160814Ssimon# critical path... At least eliminating scaling resulted in 2.8x RC4 30160814Ssimon# performance improvement [as you might recall]. As AES code is hungry 31160814Ssimon# for scaling too, I [try to] avoid the latter by favoring off-by-2 32160814Ssimon# shifts and masking the result with 0xFF<<2 instead of "boring" 0xFF. 33160814Ssimon# 34160814Ssimon# As was shown by Dean Gaudet <dean@arctic.org>, the above note turned 35160814Ssimon# void. Performance improvement with off-by-2 shifts was observed on 36160814Ssimon# intermediate implementation, which was spilling yet another register 37160814Ssimon# to stack... Final offset*4 code below runs just a tad faster on P4, 38160814Ssimon# but exhibits up to 10% improvement on other cores. 39160814Ssimon# 40160814Ssimon# Second version is "monolithic" replacement for aes_core.c, which in 41160814Ssimon# addition to AES_[de|en]crypt implements AES_set_[de|en]cryption_key. 42160814Ssimon# This made it possible to implement little-endian variant of the 43160814Ssimon# algorithm without modifying the base C code. Motivating factor for 44160814Ssimon# the undertaken effort was that it appeared that in tight IA-32 45160814Ssimon# register window little-endian flavor could achieve slightly higher 46160814Ssimon# Instruction Level Parallelism, and it indeed resulted in up to 15% 47160814Ssimon# better performance on most recent �-archs... 48160814Ssimon# 49160814Ssimon# Third version adds AES_cbc_encrypt implementation, which resulted in 50160814Ssimon# up to 40% performance imrovement of CBC benchmark results. 40% was 51160814Ssimon# observed on P4 core, where "overall" imrovement coefficient, i.e. if 52160814Ssimon# compared to PIC generated by GCC and in CBC mode, was observed to be 53160814Ssimon# as large as 4x:-) CBC performance is virtually identical to ECB now 54160814Ssimon# and on some platforms even better, e.g. 17.6 "small" cycles/byte on 55160814Ssimon# Opteron, because certain function prologues and epilogues are 56160814Ssimon# effectively taken out of the loop... 57160814Ssimon# 58160814Ssimon# Version 3.2 implements compressed tables and prefetch of these tables 59160814Ssimon# in CBC[!] mode. Former means that 3/4 of table references are now 60160814Ssimon# misaligned, which unfortunately has negative impact on elder IA-32 61160814Ssimon# implementations, Pentium suffered 30% penalty, PIII - 10%. 62160814Ssimon# 63160814Ssimon# Version 3.3 avoids L1 cache aliasing between stack frame and 64160814Ssimon# S-boxes, and 3.4 - L1 cache aliasing even between key schedule. The 65160814Ssimon# latter is achieved by copying the key schedule to controlled place in 66160814Ssimon# stack. This unfortunately has rather strong impact on small block CBC 67160814Ssimon# performance, ~2x deterioration on 16-byte block if compared to 3.3. 68160814Ssimon# 69162911Ssimon# Version 3.5 checks if there is L1 cache aliasing between user-supplied 70162911Ssimon# key schedule and S-boxes and abstains from copying the former if 71162911Ssimon# there is no. This allows end-user to consciously retain small block 72162911Ssimon# performance by aligning key schedule in specific manner. 73162911Ssimon# 74162911Ssimon# Version 3.6 compresses Td4 to 256 bytes and prefetches it in ECB. 75162911Ssimon# 76160814Ssimon# Current ECB performance numbers for 128-bit key in CPU cycles per 77160814Ssimon# processed byte [measure commonly used by AES benchmarkers] are: 78160814Ssimon# 79160814Ssimon# small footprint fully unrolled 80160814Ssimon# P4 24 22 81160814Ssimon# AMD K8 20 19 82160814Ssimon# PIII 25 23 83160814Ssimon# Pentium 81 78 84160814Ssimon 85160814Ssimonpush(@INC,"perlasm","../../perlasm"); 86160814Ssimonrequire "x86asm.pl"; 87160814Ssimon 88160814Ssimon&asm_init($ARGV[0],"aes-586.pl",$ARGV[$#ARGV] eq "386"); 89160814Ssimon 90160814Ssimon$s0="eax"; 91160814Ssimon$s1="ebx"; 92160814Ssimon$s2="ecx"; 93160814Ssimon$s3="edx"; 94160814Ssimon$key="edi"; 95160814Ssimon$acc="esi"; 96160814Ssimon 97160814Ssimon$compromise=0; # $compromise=128 abstains from copying key 98160814Ssimon # schedule to stack when encrypting inputs 99160814Ssimon # shorter than 128 bytes at the cost of 100160814Ssimon # risksing aliasing with S-boxes. In return 101160814Ssimon # you get way better, up to +70%, small block 102160814Ssimon # performance. 103160814Ssimon$small_footprint=1; # $small_footprint=1 code is ~5% slower [on 104160814Ssimon # recent �-archs], but ~5 times smaller! 105160814Ssimon # I favor compact code to minimize cache 106160814Ssimon # contention and in hope to "collect" 5% back 107160814Ssimon # in real-life applications... 108160814Ssimon$vertical_spin=0; # shift "verticaly" defaults to 0, because of 109160814Ssimon # its proof-of-concept status... 110160814Ssimon 111160814Ssimon# Note that there is no decvert(), as well as last encryption round is 112160814Ssimon# performed with "horizontal" shifts. This is because this "vertical" 113160814Ssimon# implementation [one which groups shifts on a given $s[i] to form a 114160814Ssimon# "column," unlike "horizontal" one, which groups shifts on different 115160814Ssimon# $s[i] to form a "row"] is work in progress. It was observed to run 116160814Ssimon# few percents faster on Intel cores, but not AMD. On AMD K8 core it's 117160814Ssimon# whole 12% slower:-( So we face a trade-off... Shall it be resolved 118160814Ssimon# some day? Till then the code is considered experimental and by 119160814Ssimon# default remains dormant... 120160814Ssimon 121160814Ssimonsub encvert() 122160814Ssimon{ my ($te,@s) = @_; 123160814Ssimon my $v0 = $acc, $v1 = $key; 124160814Ssimon 125160814Ssimon &mov ($v0,$s[3]); # copy s3 126160814Ssimon &mov (&DWP(4,"esp"),$s[2]); # save s2 127160814Ssimon &mov ($v1,$s[0]); # copy s0 128160814Ssimon &mov (&DWP(8,"esp"),$s[1]); # save s1 129160814Ssimon 130160814Ssimon &movz ($s[2],&HB($s[0])); 131160814Ssimon &and ($s[0],0xFF); 132160814Ssimon &mov ($s[0],&DWP(0,$te,$s[0],8)); # s0>>0 133160814Ssimon &shr ($v1,16); 134160814Ssimon &mov ($s[3],&DWP(3,$te,$s[2],8)); # s0>>8 135160814Ssimon &movz ($s[1],&HB($v1)); 136160814Ssimon &and ($v1,0xFF); 137160814Ssimon &mov ($s[2],&DWP(2,$te,$v1,8)); # s0>>16 138160814Ssimon &mov ($v1,$v0); 139160814Ssimon &mov ($s[1],&DWP(1,$te,$s[1],8)); # s0>>24 140160814Ssimon 141160814Ssimon &and ($v0,0xFF); 142160814Ssimon &xor ($s[3],&DWP(0,$te,$v0,8)); # s3>>0 143160814Ssimon &movz ($v0,&HB($v1)); 144160814Ssimon &shr ($v1,16); 145160814Ssimon &xor ($s[2],&DWP(3,$te,$v0,8)); # s3>>8 146160814Ssimon &movz ($v0,&HB($v1)); 147160814Ssimon &and ($v1,0xFF); 148160814Ssimon &xor ($s[1],&DWP(2,$te,$v1,8)); # s3>>16 149160814Ssimon &mov ($v1,&DWP(4,"esp")); # restore s2 150160814Ssimon &xor ($s[0],&DWP(1,$te,$v0,8)); # s3>>24 151160814Ssimon 152160814Ssimon &mov ($v0,$v1); 153160814Ssimon &and ($v1,0xFF); 154160814Ssimon &xor ($s[2],&DWP(0,$te,$v1,8)); # s2>>0 155160814Ssimon &movz ($v1,&HB($v0)); 156160814Ssimon &shr ($v0,16); 157160814Ssimon &xor ($s[1],&DWP(3,$te,$v1,8)); # s2>>8 158160814Ssimon &movz ($v1,&HB($v0)); 159160814Ssimon &and ($v0,0xFF); 160160814Ssimon &xor ($s[0],&DWP(2,$te,$v0,8)); # s2>>16 161160814Ssimon &mov ($v0,&DWP(8,"esp")); # restore s1 162160814Ssimon &xor ($s[3],&DWP(1,$te,$v1,8)); # s2>>24 163160814Ssimon 164160814Ssimon &mov ($v1,$v0); 165160814Ssimon &and ($v0,0xFF); 166160814Ssimon &xor ($s[1],&DWP(0,$te,$v0,8)); # s1>>0 167160814Ssimon &movz ($v0,&HB($v1)); 168160814Ssimon &shr ($v1,16); 169160814Ssimon &xor ($s[0],&DWP(3,$te,$v0,8)); # s1>>8 170160814Ssimon &movz ($v0,&HB($v1)); 171160814Ssimon &and ($v1,0xFF); 172160814Ssimon &xor ($s[3],&DWP(2,$te,$v1,8)); # s1>>16 173160814Ssimon &mov ($key,&DWP(12,"esp")); # reincarnate v1 as key 174160814Ssimon &xor ($s[2],&DWP(1,$te,$v0,8)); # s1>>24 175160814Ssimon} 176160814Ssimon 177160814Ssimonsub encstep() 178160814Ssimon{ my ($i,$te,@s) = @_; 179160814Ssimon my $tmp = $key; 180160814Ssimon my $out = $i==3?$s[0]:$acc; 181160814Ssimon 182160814Ssimon # lines marked with #%e?x[i] denote "reordered" instructions... 183160814Ssimon if ($i==3) { &mov ($key,&DWP(12,"esp")); }##%edx 184160814Ssimon else { &mov ($out,$s[0]); 185160814Ssimon &and ($out,0xFF); } 186160814Ssimon if ($i==1) { &shr ($s[0],16); }#%ebx[1] 187160814Ssimon if ($i==2) { &shr ($s[0],24); }#%ecx[2] 188160814Ssimon &mov ($out,&DWP(0,$te,$out,8)); 189160814Ssimon 190160814Ssimon if ($i==3) { $tmp=$s[1]; }##%eax 191160814Ssimon &movz ($tmp,&HB($s[1])); 192160814Ssimon &xor ($out,&DWP(3,$te,$tmp,8)); 193160814Ssimon 194160814Ssimon if ($i==3) { $tmp=$s[2]; &mov ($s[1],&DWP(4,"esp")); }##%ebx 195160814Ssimon else { &mov ($tmp,$s[2]); 196160814Ssimon &shr ($tmp,16); } 197160814Ssimon if ($i==2) { &and ($s[1],0xFF); }#%edx[2] 198160814Ssimon &and ($tmp,0xFF); 199160814Ssimon &xor ($out,&DWP(2,$te,$tmp,8)); 200160814Ssimon 201160814Ssimon if ($i==3) { $tmp=$s[3]; &mov ($s[2],&DWP(8,"esp")); }##%ecx 202160814Ssimon elsif($i==2){ &movz ($tmp,&HB($s[3])); }#%ebx[2] 203160814Ssimon else { &mov ($tmp,$s[3]); 204160814Ssimon &shr ($tmp,24) } 205160814Ssimon &xor ($out,&DWP(1,$te,$tmp,8)); 206160814Ssimon if ($i<2) { &mov (&DWP(4+4*$i,"esp"),$out); } 207160814Ssimon if ($i==3) { &mov ($s[3],$acc); } 208160814Ssimon &comment(); 209160814Ssimon} 210160814Ssimon 211160814Ssimonsub enclast() 212160814Ssimon{ my ($i,$te,@s)=@_; 213160814Ssimon my $tmp = $key; 214160814Ssimon my $out = $i==3?$s[0]:$acc; 215160814Ssimon 216160814Ssimon if ($i==3) { &mov ($key,&DWP(12,"esp")); }##%edx 217160814Ssimon else { &mov ($out,$s[0]); } 218160814Ssimon &and ($out,0xFF); 219160814Ssimon if ($i==1) { &shr ($s[0],16); }#%ebx[1] 220160814Ssimon if ($i==2) { &shr ($s[0],24); }#%ecx[2] 221160814Ssimon &mov ($out,&DWP(2,$te,$out,8)); 222160814Ssimon &and ($out,0x000000ff); 223160814Ssimon 224160814Ssimon if ($i==3) { $tmp=$s[1]; }##%eax 225160814Ssimon &movz ($tmp,&HB($s[1])); 226160814Ssimon &mov ($tmp,&DWP(0,$te,$tmp,8)); 227160814Ssimon &and ($tmp,0x0000ff00); 228160814Ssimon &xor ($out,$tmp); 229160814Ssimon 230160814Ssimon if ($i==3) { $tmp=$s[2]; &mov ($s[1],&DWP(4,"esp")); }##%ebx 231160814Ssimon else { mov ($tmp,$s[2]); 232160814Ssimon &shr ($tmp,16); } 233160814Ssimon if ($i==2) { &and ($s[1],0xFF); }#%edx[2] 234160814Ssimon &and ($tmp,0xFF); 235160814Ssimon &mov ($tmp,&DWP(0,$te,$tmp,8)); 236160814Ssimon &and ($tmp,0x00ff0000); 237160814Ssimon &xor ($out,$tmp); 238160814Ssimon 239160814Ssimon if ($i==3) { $tmp=$s[3]; &mov ($s[2],&DWP(8,"esp")); }##%ecx 240160814Ssimon elsif($i==2){ &movz ($tmp,&HB($s[3])); }#%ebx[2] 241160814Ssimon else { &mov ($tmp,$s[3]); 242160814Ssimon &shr ($tmp,24); } 243160814Ssimon &mov ($tmp,&DWP(2,$te,$tmp,8)); 244160814Ssimon &and ($tmp,0xff000000); 245160814Ssimon &xor ($out,$tmp); 246160814Ssimon if ($i<2) { &mov (&DWP(4+4*$i,"esp"),$out); } 247160814Ssimon if ($i==3) { &mov ($s[3],$acc); } 248160814Ssimon} 249160814Ssimon 250160814Ssimonsub _data_word() { my $i; while(defined($i=shift)) { &data_word($i,$i); } } 251160814Ssimon 252160814Ssimon&public_label("AES_Te"); 253160814Ssimon&function_begin_B("_x86_AES_encrypt"); 254160814Ssimon if ($vertical_spin) { 255160814Ssimon # I need high parts of volatile registers to be accessible... 256160814Ssimon &exch ($s1="edi",$key="ebx"); 257160814Ssimon &mov ($s2="esi",$acc="ecx"); 258160814Ssimon } 259160814Ssimon 260160814Ssimon # note that caller is expected to allocate stack frame for me! 261160814Ssimon &mov (&DWP(12,"esp"),$key); # save key 262160814Ssimon 263160814Ssimon &xor ($s0,&DWP(0,$key)); # xor with key 264160814Ssimon &xor ($s1,&DWP(4,$key)); 265160814Ssimon &xor ($s2,&DWP(8,$key)); 266160814Ssimon &xor ($s3,&DWP(12,$key)); 267160814Ssimon 268160814Ssimon &mov ($acc,&DWP(240,$key)); # load key->rounds 269160814Ssimon 270160814Ssimon if ($small_footprint) { 271160814Ssimon &lea ($acc,&DWP(-2,$acc,$acc)); 272160814Ssimon &lea ($acc,&DWP(0,$key,$acc,8)); 273160814Ssimon &mov (&DWP(16,"esp"),$acc); # end of key schedule 274160814Ssimon &align (4); 275160814Ssimon &set_label("loop"); 276160814Ssimon if ($vertical_spin) { 277160814Ssimon &encvert("ebp",$s0,$s1,$s2,$s3); 278160814Ssimon } else { 279160814Ssimon &encstep(0,"ebp",$s0,$s1,$s2,$s3); 280160814Ssimon &encstep(1,"ebp",$s1,$s2,$s3,$s0); 281160814Ssimon &encstep(2,"ebp",$s2,$s3,$s0,$s1); 282160814Ssimon &encstep(3,"ebp",$s3,$s0,$s1,$s2); 283160814Ssimon } 284160814Ssimon &add ($key,16); # advance rd_key 285160814Ssimon &xor ($s0,&DWP(0,$key)); 286160814Ssimon &xor ($s1,&DWP(4,$key)); 287160814Ssimon &xor ($s2,&DWP(8,$key)); 288160814Ssimon &xor ($s3,&DWP(12,$key)); 289160814Ssimon &cmp ($key,&DWP(16,"esp")); 290160814Ssimon &mov (&DWP(12,"esp"),$key); 291160814Ssimon &jb (&label("loop")); 292160814Ssimon } 293160814Ssimon else { 294160814Ssimon &cmp ($acc,10); 295160814Ssimon &jle (&label("10rounds")); 296160814Ssimon &cmp ($acc,12); 297160814Ssimon &jle (&label("12rounds")); 298160814Ssimon 299160814Ssimon &set_label("14rounds"); 300160814Ssimon for ($i=1;$i<3;$i++) { 301160814Ssimon if ($vertical_spin) { 302160814Ssimon &encvert("ebp",$s0,$s1,$s2,$s3); 303160814Ssimon } else { 304160814Ssimon &encstep(0,"ebp",$s0,$s1,$s2,$s3); 305160814Ssimon &encstep(1,"ebp",$s1,$s2,$s3,$s0); 306160814Ssimon &encstep(2,"ebp",$s2,$s3,$s0,$s1); 307160814Ssimon &encstep(3,"ebp",$s3,$s0,$s1,$s2); 308160814Ssimon } 309160814Ssimon &xor ($s0,&DWP(16*$i+0,$key)); 310160814Ssimon &xor ($s1,&DWP(16*$i+4,$key)); 311160814Ssimon &xor ($s2,&DWP(16*$i+8,$key)); 312160814Ssimon &xor ($s3,&DWP(16*$i+12,$key)); 313160814Ssimon } 314160814Ssimon &add ($key,32); 315160814Ssimon &mov (&DWP(12,"esp"),$key); # advance rd_key 316160814Ssimon &set_label("12rounds"); 317160814Ssimon for ($i=1;$i<3;$i++) { 318160814Ssimon if ($vertical_spin) { 319160814Ssimon &encvert("ebp",$s0,$s1,$s2,$s3); 320160814Ssimon } else { 321160814Ssimon &encstep(0,"ebp",$s0,$s1,$s2,$s3); 322160814Ssimon &encstep(1,"ebp",$s1,$s2,$s3,$s0); 323160814Ssimon &encstep(2,"ebp",$s2,$s3,$s0,$s1); 324160814Ssimon &encstep(3,"ebp",$s3,$s0,$s1,$s2); 325160814Ssimon } 326160814Ssimon &xor ($s0,&DWP(16*$i+0,$key)); 327160814Ssimon &xor ($s1,&DWP(16*$i+4,$key)); 328160814Ssimon &xor ($s2,&DWP(16*$i+8,$key)); 329160814Ssimon &xor ($s3,&DWP(16*$i+12,$key)); 330160814Ssimon } 331160814Ssimon &add ($key,32); 332160814Ssimon &mov (&DWP(12,"esp"),$key); # advance rd_key 333160814Ssimon &set_label("10rounds"); 334160814Ssimon for ($i=1;$i<10;$i++) { 335160814Ssimon if ($vertical_spin) { 336160814Ssimon &encvert("ebp",$s0,$s1,$s2,$s3); 337160814Ssimon } else { 338160814Ssimon &encstep(0,"ebp",$s0,$s1,$s2,$s3); 339160814Ssimon &encstep(1,"ebp",$s1,$s2,$s3,$s0); 340160814Ssimon &encstep(2,"ebp",$s2,$s3,$s0,$s1); 341160814Ssimon &encstep(3,"ebp",$s3,$s0,$s1,$s2); 342160814Ssimon } 343160814Ssimon &xor ($s0,&DWP(16*$i+0,$key)); 344160814Ssimon &xor ($s1,&DWP(16*$i+4,$key)); 345160814Ssimon &xor ($s2,&DWP(16*$i+8,$key)); 346160814Ssimon &xor ($s3,&DWP(16*$i+12,$key)); 347160814Ssimon } 348160814Ssimon } 349160814Ssimon 350160814Ssimon if ($vertical_spin) { 351160814Ssimon # "reincarnate" some registers for "horizontal" spin... 352160814Ssimon &mov ($s1="ebx",$key="edi"); 353160814Ssimon &mov ($s2="ecx",$acc="esi"); 354160814Ssimon } 355160814Ssimon &enclast(0,"ebp",$s0,$s1,$s2,$s3); 356160814Ssimon &enclast(1,"ebp",$s1,$s2,$s3,$s0); 357160814Ssimon &enclast(2,"ebp",$s2,$s3,$s0,$s1); 358160814Ssimon &enclast(3,"ebp",$s3,$s0,$s1,$s2); 359160814Ssimon 360160814Ssimon &add ($key,$small_footprint?16:160); 361160814Ssimon &xor ($s0,&DWP(0,$key)); 362160814Ssimon &xor ($s1,&DWP(4,$key)); 363160814Ssimon &xor ($s2,&DWP(8,$key)); 364160814Ssimon &xor ($s3,&DWP(12,$key)); 365160814Ssimon 366160814Ssimon &ret (); 367160814Ssimon 368160814Ssimon&set_label("AES_Te",64); # Yes! I keep it in the code segment! 369160814Ssimon &_data_word(0xa56363c6, 0x847c7cf8, 0x997777ee, 0x8d7b7bf6); 370160814Ssimon &_data_word(0x0df2f2ff, 0xbd6b6bd6, 0xb16f6fde, 0x54c5c591); 371160814Ssimon &_data_word(0x50303060, 0x03010102, 0xa96767ce, 0x7d2b2b56); 372160814Ssimon &_data_word(0x19fefee7, 0x62d7d7b5, 0xe6abab4d, 0x9a7676ec); 373160814Ssimon &_data_word(0x45caca8f, 0x9d82821f, 0x40c9c989, 0x877d7dfa); 374160814Ssimon &_data_word(0x15fafaef, 0xeb5959b2, 0xc947478e, 0x0bf0f0fb); 375160814Ssimon &_data_word(0xecadad41, 0x67d4d4b3, 0xfda2a25f, 0xeaafaf45); 376160814Ssimon &_data_word(0xbf9c9c23, 0xf7a4a453, 0x967272e4, 0x5bc0c09b); 377160814Ssimon &_data_word(0xc2b7b775, 0x1cfdfde1, 0xae93933d, 0x6a26264c); 378160814Ssimon &_data_word(0x5a36366c, 0x413f3f7e, 0x02f7f7f5, 0x4fcccc83); 379160814Ssimon &_data_word(0x5c343468, 0xf4a5a551, 0x34e5e5d1, 0x08f1f1f9); 380160814Ssimon &_data_word(0x937171e2, 0x73d8d8ab, 0x53313162, 0x3f15152a); 381160814Ssimon &_data_word(0x0c040408, 0x52c7c795, 0x65232346, 0x5ec3c39d); 382160814Ssimon &_data_word(0x28181830, 0xa1969637, 0x0f05050a, 0xb59a9a2f); 383160814Ssimon &_data_word(0x0907070e, 0x36121224, 0x9b80801b, 0x3de2e2df); 384160814Ssimon &_data_word(0x26ebebcd, 0x6927274e, 0xcdb2b27f, 0x9f7575ea); 385160814Ssimon &_data_word(0x1b090912, 0x9e83831d, 0x742c2c58, 0x2e1a1a34); 386160814Ssimon &_data_word(0x2d1b1b36, 0xb26e6edc, 0xee5a5ab4, 0xfba0a05b); 387160814Ssimon &_data_word(0xf65252a4, 0x4d3b3b76, 0x61d6d6b7, 0xceb3b37d); 388160814Ssimon &_data_word(0x7b292952, 0x3ee3e3dd, 0x712f2f5e, 0x97848413); 389160814Ssimon &_data_word(0xf55353a6, 0x68d1d1b9, 0x00000000, 0x2cededc1); 390160814Ssimon &_data_word(0x60202040, 0x1ffcfce3, 0xc8b1b179, 0xed5b5bb6); 391160814Ssimon &_data_word(0xbe6a6ad4, 0x46cbcb8d, 0xd9bebe67, 0x4b393972); 392160814Ssimon &_data_word(0xde4a4a94, 0xd44c4c98, 0xe85858b0, 0x4acfcf85); 393160814Ssimon &_data_word(0x6bd0d0bb, 0x2aefefc5, 0xe5aaaa4f, 0x16fbfbed); 394160814Ssimon &_data_word(0xc5434386, 0xd74d4d9a, 0x55333366, 0x94858511); 395160814Ssimon &_data_word(0xcf45458a, 0x10f9f9e9, 0x06020204, 0x817f7ffe); 396160814Ssimon &_data_word(0xf05050a0, 0x443c3c78, 0xba9f9f25, 0xe3a8a84b); 397160814Ssimon &_data_word(0xf35151a2, 0xfea3a35d, 0xc0404080, 0x8a8f8f05); 398160814Ssimon &_data_word(0xad92923f, 0xbc9d9d21, 0x48383870, 0x04f5f5f1); 399160814Ssimon &_data_word(0xdfbcbc63, 0xc1b6b677, 0x75dadaaf, 0x63212142); 400160814Ssimon &_data_word(0x30101020, 0x1affffe5, 0x0ef3f3fd, 0x6dd2d2bf); 401160814Ssimon &_data_word(0x4ccdcd81, 0x140c0c18, 0x35131326, 0x2fececc3); 402160814Ssimon &_data_word(0xe15f5fbe, 0xa2979735, 0xcc444488, 0x3917172e); 403160814Ssimon &_data_word(0x57c4c493, 0xf2a7a755, 0x827e7efc, 0x473d3d7a); 404160814Ssimon &_data_word(0xac6464c8, 0xe75d5dba, 0x2b191932, 0x957373e6); 405160814Ssimon &_data_word(0xa06060c0, 0x98818119, 0xd14f4f9e, 0x7fdcdca3); 406160814Ssimon &_data_word(0x66222244, 0x7e2a2a54, 0xab90903b, 0x8388880b); 407160814Ssimon &_data_word(0xca46468c, 0x29eeeec7, 0xd3b8b86b, 0x3c141428); 408160814Ssimon &_data_word(0x79dedea7, 0xe25e5ebc, 0x1d0b0b16, 0x76dbdbad); 409160814Ssimon &_data_word(0x3be0e0db, 0x56323264, 0x4e3a3a74, 0x1e0a0a14); 410160814Ssimon &_data_word(0xdb494992, 0x0a06060c, 0x6c242448, 0xe45c5cb8); 411160814Ssimon &_data_word(0x5dc2c29f, 0x6ed3d3bd, 0xefacac43, 0xa66262c4); 412160814Ssimon &_data_word(0xa8919139, 0xa4959531, 0x37e4e4d3, 0x8b7979f2); 413160814Ssimon &_data_word(0x32e7e7d5, 0x43c8c88b, 0x5937376e, 0xb76d6dda); 414160814Ssimon &_data_word(0x8c8d8d01, 0x64d5d5b1, 0xd24e4e9c, 0xe0a9a949); 415160814Ssimon &_data_word(0xb46c6cd8, 0xfa5656ac, 0x07f4f4f3, 0x25eaeacf); 416160814Ssimon &_data_word(0xaf6565ca, 0x8e7a7af4, 0xe9aeae47, 0x18080810); 417160814Ssimon &_data_word(0xd5baba6f, 0x887878f0, 0x6f25254a, 0x722e2e5c); 418160814Ssimon &_data_word(0x241c1c38, 0xf1a6a657, 0xc7b4b473, 0x51c6c697); 419160814Ssimon &_data_word(0x23e8e8cb, 0x7cdddda1, 0x9c7474e8, 0x211f1f3e); 420160814Ssimon &_data_word(0xdd4b4b96, 0xdcbdbd61, 0x868b8b0d, 0x858a8a0f); 421160814Ssimon &_data_word(0x907070e0, 0x423e3e7c, 0xc4b5b571, 0xaa6666cc); 422160814Ssimon &_data_word(0xd8484890, 0x05030306, 0x01f6f6f7, 0x120e0e1c); 423160814Ssimon &_data_word(0xa36161c2, 0x5f35356a, 0xf95757ae, 0xd0b9b969); 424160814Ssimon &_data_word(0x91868617, 0x58c1c199, 0x271d1d3a, 0xb99e9e27); 425160814Ssimon &_data_word(0x38e1e1d9, 0x13f8f8eb, 0xb398982b, 0x33111122); 426160814Ssimon &_data_word(0xbb6969d2, 0x70d9d9a9, 0x898e8e07, 0xa7949433); 427160814Ssimon &_data_word(0xb69b9b2d, 0x221e1e3c, 0x92878715, 0x20e9e9c9); 428160814Ssimon &_data_word(0x49cece87, 0xff5555aa, 0x78282850, 0x7adfdfa5); 429160814Ssimon &_data_word(0x8f8c8c03, 0xf8a1a159, 0x80898909, 0x170d0d1a); 430160814Ssimon &_data_word(0xdabfbf65, 0x31e6e6d7, 0xc6424284, 0xb86868d0); 431160814Ssimon &_data_word(0xc3414182, 0xb0999929, 0x772d2d5a, 0x110f0f1e); 432160814Ssimon &_data_word(0xcbb0b07b, 0xfc5454a8, 0xd6bbbb6d, 0x3a16162c); 433160814Ssimon#rcon: 434160814Ssimon &data_word(0x00000001, 0x00000002, 0x00000004, 0x00000008); 435160814Ssimon &data_word(0x00000010, 0x00000020, 0x00000040, 0x00000080); 436160814Ssimon &data_word(0x0000001b, 0x00000036, 0, 0, 0, 0, 0, 0); 437160814Ssimon&function_end_B("_x86_AES_encrypt"); 438160814Ssimon 439160814Ssimon# void AES_encrypt (const void *inp,void *out,const AES_KEY *key); 440160814Ssimon&public_label("AES_Te"); 441160814Ssimon&function_begin("AES_encrypt"); 442160814Ssimon &mov ($acc,&wparam(0)); # load inp 443160814Ssimon &mov ($key,&wparam(2)); # load key 444160814Ssimon 445160814Ssimon &mov ($s0,"esp"); 446160814Ssimon &sub ("esp",24); 447160814Ssimon &and ("esp",-64); 448160814Ssimon &add ("esp",4); 449160814Ssimon &mov (&DWP(16,"esp"),$s0); 450160814Ssimon 451160814Ssimon &call (&label("pic_point")); # make it PIC! 452160814Ssimon &set_label("pic_point"); 453160814Ssimon &blindpop("ebp"); 454160814Ssimon &lea ("ebp",&DWP(&label("AES_Te")."-".&label("pic_point"),"ebp")); 455160814Ssimon 456160814Ssimon &mov ($s0,&DWP(0,$acc)); # load input data 457160814Ssimon &mov ($s1,&DWP(4,$acc)); 458160814Ssimon &mov ($s2,&DWP(8,$acc)); 459160814Ssimon &mov ($s3,&DWP(12,$acc)); 460160814Ssimon 461160814Ssimon &call ("_x86_AES_encrypt"); 462160814Ssimon 463160814Ssimon &mov ("esp",&DWP(16,"esp")); 464160814Ssimon 465160814Ssimon &mov ($acc,&wparam(1)); # load out 466160814Ssimon &mov (&DWP(0,$acc),$s0); # write output data 467160814Ssimon &mov (&DWP(4,$acc),$s1); 468160814Ssimon &mov (&DWP(8,$acc),$s2); 469160814Ssimon &mov (&DWP(12,$acc),$s3); 470160814Ssimon&function_end("AES_encrypt"); 471160814Ssimon 472160814Ssimon#------------------------------------------------------------------# 473160814Ssimon 474160814Ssimonsub decstep() 475160814Ssimon{ my ($i,$td,@s) = @_; 476160814Ssimon my $tmp = $key; 477160814Ssimon my $out = $i==3?$s[0]:$acc; 478160814Ssimon 479160814Ssimon # no instructions are reordered, as performance appears 480160814Ssimon # optimal... or rather that all attempts to reorder didn't 481160814Ssimon # result in better performance [which by the way is not a 482160814Ssimon # bit lower than ecryption]. 483160814Ssimon if($i==3) { &mov ($key,&DWP(12,"esp")); } 484160814Ssimon else { &mov ($out,$s[0]); } 485160814Ssimon &and ($out,0xFF); 486160814Ssimon &mov ($out,&DWP(0,$td,$out,8)); 487160814Ssimon 488160814Ssimon if ($i==3) { $tmp=$s[1]; } 489160814Ssimon &movz ($tmp,&HB($s[1])); 490160814Ssimon &xor ($out,&DWP(3,$td,$tmp,8)); 491160814Ssimon 492160814Ssimon if ($i==3) { $tmp=$s[2]; &mov ($s[1],$acc); } 493160814Ssimon else { &mov ($tmp,$s[2]); } 494160814Ssimon &shr ($tmp,16); 495160814Ssimon &and ($tmp,0xFF); 496160814Ssimon &xor ($out,&DWP(2,$td,$tmp,8)); 497160814Ssimon 498160814Ssimon if ($i==3) { $tmp=$s[3]; &mov ($s[2],&DWP(8,"esp")); } 499160814Ssimon else { &mov ($tmp,$s[3]); } 500160814Ssimon &shr ($tmp,24); 501160814Ssimon &xor ($out,&DWP(1,$td,$tmp,8)); 502160814Ssimon if ($i<2) { &mov (&DWP(4+4*$i,"esp"),$out); } 503160814Ssimon if ($i==3) { &mov ($s[3],&DWP(4,"esp")); } 504160814Ssimon &comment(); 505160814Ssimon} 506160814Ssimon 507160814Ssimonsub declast() 508160814Ssimon{ my ($i,$td,@s)=@_; 509160814Ssimon my $tmp = $key; 510160814Ssimon my $out = $i==3?$s[0]:$acc; 511160814Ssimon 512160814Ssimon if($i==3) { &mov ($key,&DWP(12,"esp")); } 513160814Ssimon else { &mov ($out,$s[0]); } 514160814Ssimon &and ($out,0xFF); 515194206Ssimon &movz ($out,&BP(2048,$td,$out,1)); 516160814Ssimon 517160814Ssimon if ($i==3) { $tmp=$s[1]; } 518160814Ssimon &movz ($tmp,&HB($s[1])); 519194206Ssimon &movz ($tmp,&BP(2048,$td,$tmp,1)); 520162911Ssimon &shl ($tmp,8); 521160814Ssimon &xor ($out,$tmp); 522160814Ssimon 523160814Ssimon if ($i==3) { $tmp=$s[2]; &mov ($s[1],$acc); } 524160814Ssimon else { mov ($tmp,$s[2]); } 525160814Ssimon &shr ($tmp,16); 526160814Ssimon &and ($tmp,0xFF); 527194206Ssimon &movz ($tmp,&BP(2048,$td,$tmp,1)); 528162911Ssimon &shl ($tmp,16); 529160814Ssimon &xor ($out,$tmp); 530160814Ssimon 531160814Ssimon if ($i==3) { $tmp=$s[3]; &mov ($s[2],&DWP(8,"esp")); } 532160814Ssimon else { &mov ($tmp,$s[3]); } 533160814Ssimon &shr ($tmp,24); 534194206Ssimon &movz ($tmp,&BP(2048,$td,$tmp,1)); 535162911Ssimon &shl ($tmp,24); 536160814Ssimon &xor ($out,$tmp); 537160814Ssimon if ($i<2) { &mov (&DWP(4+4*$i,"esp"),$out); } 538160814Ssimon if ($i==3) { &mov ($s[3],&DWP(4,"esp")); } 539160814Ssimon} 540160814Ssimon 541160814Ssimon&public_label("AES_Td"); 542160814Ssimon&function_begin_B("_x86_AES_decrypt"); 543160814Ssimon # note that caller is expected to allocate stack frame for me! 544160814Ssimon &mov (&DWP(12,"esp"),$key); # save key 545160814Ssimon 546160814Ssimon &xor ($s0,&DWP(0,$key)); # xor with key 547160814Ssimon &xor ($s1,&DWP(4,$key)); 548160814Ssimon &xor ($s2,&DWP(8,$key)); 549160814Ssimon &xor ($s3,&DWP(12,$key)); 550160814Ssimon 551160814Ssimon &mov ($acc,&DWP(240,$key)); # load key->rounds 552160814Ssimon 553160814Ssimon if ($small_footprint) { 554160814Ssimon &lea ($acc,&DWP(-2,$acc,$acc)); 555160814Ssimon &lea ($acc,&DWP(0,$key,$acc,8)); 556160814Ssimon &mov (&DWP(16,"esp"),$acc); # end of key schedule 557160814Ssimon &align (4); 558160814Ssimon &set_label("loop"); 559160814Ssimon &decstep(0,"ebp",$s0,$s3,$s2,$s1); 560160814Ssimon &decstep(1,"ebp",$s1,$s0,$s3,$s2); 561160814Ssimon &decstep(2,"ebp",$s2,$s1,$s0,$s3); 562160814Ssimon &decstep(3,"ebp",$s3,$s2,$s1,$s0); 563160814Ssimon &add ($key,16); # advance rd_key 564160814Ssimon &xor ($s0,&DWP(0,$key)); 565160814Ssimon &xor ($s1,&DWP(4,$key)); 566160814Ssimon &xor ($s2,&DWP(8,$key)); 567160814Ssimon &xor ($s3,&DWP(12,$key)); 568160814Ssimon &cmp ($key,&DWP(16,"esp")); 569160814Ssimon &mov (&DWP(12,"esp"),$key); 570160814Ssimon &jb (&label("loop")); 571160814Ssimon } 572160814Ssimon else { 573160814Ssimon &cmp ($acc,10); 574160814Ssimon &jle (&label("10rounds")); 575160814Ssimon &cmp ($acc,12); 576160814Ssimon &jle (&label("12rounds")); 577160814Ssimon 578160814Ssimon &set_label("14rounds"); 579160814Ssimon for ($i=1;$i<3;$i++) { 580160814Ssimon &decstep(0,"ebp",$s0,$s3,$s2,$s1); 581160814Ssimon &decstep(1,"ebp",$s1,$s0,$s3,$s2); 582160814Ssimon &decstep(2,"ebp",$s2,$s1,$s0,$s3); 583160814Ssimon &decstep(3,"ebp",$s3,$s2,$s1,$s0); 584160814Ssimon &xor ($s0,&DWP(16*$i+0,$key)); 585160814Ssimon &xor ($s1,&DWP(16*$i+4,$key)); 586160814Ssimon &xor ($s2,&DWP(16*$i+8,$key)); 587160814Ssimon &xor ($s3,&DWP(16*$i+12,$key)); 588160814Ssimon } 589160814Ssimon &add ($key,32); 590160814Ssimon &mov (&DWP(12,"esp"),$key); # advance rd_key 591160814Ssimon &set_label("12rounds"); 592160814Ssimon for ($i=1;$i<3;$i++) { 593160814Ssimon &decstep(0,"ebp",$s0,$s3,$s2,$s1); 594160814Ssimon &decstep(1,"ebp",$s1,$s0,$s3,$s2); 595160814Ssimon &decstep(2,"ebp",$s2,$s1,$s0,$s3); 596160814Ssimon &decstep(3,"ebp",$s3,$s2,$s1,$s0); 597160814Ssimon &xor ($s0,&DWP(16*$i+0,$key)); 598160814Ssimon &xor ($s1,&DWP(16*$i+4,$key)); 599160814Ssimon &xor ($s2,&DWP(16*$i+8,$key)); 600160814Ssimon &xor ($s3,&DWP(16*$i+12,$key)); 601160814Ssimon } 602160814Ssimon &add ($key,32); 603160814Ssimon &mov (&DWP(12,"esp"),$key); # advance rd_key 604160814Ssimon &set_label("10rounds"); 605160814Ssimon for ($i=1;$i<10;$i++) { 606160814Ssimon &decstep(0,"ebp",$s0,$s3,$s2,$s1); 607160814Ssimon &decstep(1,"ebp",$s1,$s0,$s3,$s2); 608160814Ssimon &decstep(2,"ebp",$s2,$s1,$s0,$s3); 609160814Ssimon &decstep(3,"ebp",$s3,$s2,$s1,$s0); 610160814Ssimon &xor ($s0,&DWP(16*$i+0,$key)); 611160814Ssimon &xor ($s1,&DWP(16*$i+4,$key)); 612160814Ssimon &xor ($s2,&DWP(16*$i+8,$key)); 613160814Ssimon &xor ($s3,&DWP(16*$i+12,$key)); 614160814Ssimon } 615160814Ssimon } 616160814Ssimon 617160814Ssimon &declast(0,"ebp",$s0,$s3,$s2,$s1); 618160814Ssimon &declast(1,"ebp",$s1,$s0,$s3,$s2); 619160814Ssimon &declast(2,"ebp",$s2,$s1,$s0,$s3); 620160814Ssimon &declast(3,"ebp",$s3,$s2,$s1,$s0); 621160814Ssimon 622160814Ssimon &add ($key,$small_footprint?16:160); 623160814Ssimon &xor ($s0,&DWP(0,$key)); 624160814Ssimon &xor ($s1,&DWP(4,$key)); 625160814Ssimon &xor ($s2,&DWP(8,$key)); 626160814Ssimon &xor ($s3,&DWP(12,$key)); 627160814Ssimon 628160814Ssimon &ret (); 629160814Ssimon 630160814Ssimon&set_label("AES_Td",64); # Yes! I keep it in the code segment! 631160814Ssimon &_data_word(0x50a7f451, 0x5365417e, 0xc3a4171a, 0x965e273a); 632160814Ssimon &_data_word(0xcb6bab3b, 0xf1459d1f, 0xab58faac, 0x9303e34b); 633160814Ssimon &_data_word(0x55fa3020, 0xf66d76ad, 0x9176cc88, 0x254c02f5); 634160814Ssimon &_data_word(0xfcd7e54f, 0xd7cb2ac5, 0x80443526, 0x8fa362b5); 635160814Ssimon &_data_word(0x495ab1de, 0x671bba25, 0x980eea45, 0xe1c0fe5d); 636160814Ssimon &_data_word(0x02752fc3, 0x12f04c81, 0xa397468d, 0xc6f9d36b); 637160814Ssimon &_data_word(0xe75f8f03, 0x959c9215, 0xeb7a6dbf, 0xda595295); 638160814Ssimon &_data_word(0x2d83bed4, 0xd3217458, 0x2969e049, 0x44c8c98e); 639160814Ssimon &_data_word(0x6a89c275, 0x78798ef4, 0x6b3e5899, 0xdd71b927); 640160814Ssimon &_data_word(0xb64fe1be, 0x17ad88f0, 0x66ac20c9, 0xb43ace7d); 641160814Ssimon &_data_word(0x184adf63, 0x82311ae5, 0x60335197, 0x457f5362); 642160814Ssimon &_data_word(0xe07764b1, 0x84ae6bbb, 0x1ca081fe, 0x942b08f9); 643160814Ssimon &_data_word(0x58684870, 0x19fd458f, 0x876cde94, 0xb7f87b52); 644160814Ssimon &_data_word(0x23d373ab, 0xe2024b72, 0x578f1fe3, 0x2aab5566); 645160814Ssimon &_data_word(0x0728ebb2, 0x03c2b52f, 0x9a7bc586, 0xa50837d3); 646160814Ssimon &_data_word(0xf2872830, 0xb2a5bf23, 0xba6a0302, 0x5c8216ed); 647160814Ssimon &_data_word(0x2b1ccf8a, 0x92b479a7, 0xf0f207f3, 0xa1e2694e); 648160814Ssimon &_data_word(0xcdf4da65, 0xd5be0506, 0x1f6234d1, 0x8afea6c4); 649160814Ssimon &_data_word(0x9d532e34, 0xa055f3a2, 0x32e18a05, 0x75ebf6a4); 650160814Ssimon &_data_word(0x39ec830b, 0xaaef6040, 0x069f715e, 0x51106ebd); 651160814Ssimon &_data_word(0xf98a213e, 0x3d06dd96, 0xae053edd, 0x46bde64d); 652160814Ssimon &_data_word(0xb58d5491, 0x055dc471, 0x6fd40604, 0xff155060); 653160814Ssimon &_data_word(0x24fb9819, 0x97e9bdd6, 0xcc434089, 0x779ed967); 654160814Ssimon &_data_word(0xbd42e8b0, 0x888b8907, 0x385b19e7, 0xdbeec879); 655160814Ssimon &_data_word(0x470a7ca1, 0xe90f427c, 0xc91e84f8, 0x00000000); 656160814Ssimon &_data_word(0x83868009, 0x48ed2b32, 0xac70111e, 0x4e725a6c); 657160814Ssimon &_data_word(0xfbff0efd, 0x5638850f, 0x1ed5ae3d, 0x27392d36); 658160814Ssimon &_data_word(0x64d90f0a, 0x21a65c68, 0xd1545b9b, 0x3a2e3624); 659160814Ssimon &_data_word(0xb1670a0c, 0x0fe75793, 0xd296eeb4, 0x9e919b1b); 660160814Ssimon &_data_word(0x4fc5c080, 0xa220dc61, 0x694b775a, 0x161a121c); 661160814Ssimon &_data_word(0x0aba93e2, 0xe52aa0c0, 0x43e0223c, 0x1d171b12); 662160814Ssimon &_data_word(0x0b0d090e, 0xadc78bf2, 0xb9a8b62d, 0xc8a91e14); 663160814Ssimon &_data_word(0x8519f157, 0x4c0775af, 0xbbdd99ee, 0xfd607fa3); 664160814Ssimon &_data_word(0x9f2601f7, 0xbcf5725c, 0xc53b6644, 0x347efb5b); 665160814Ssimon &_data_word(0x7629438b, 0xdcc623cb, 0x68fcedb6, 0x63f1e4b8); 666160814Ssimon &_data_word(0xcadc31d7, 0x10856342, 0x40229713, 0x2011c684); 667160814Ssimon &_data_word(0x7d244a85, 0xf83dbbd2, 0x1132f9ae, 0x6da129c7); 668160814Ssimon &_data_word(0x4b2f9e1d, 0xf330b2dc, 0xec52860d, 0xd0e3c177); 669160814Ssimon &_data_word(0x6c16b32b, 0x99b970a9, 0xfa489411, 0x2264e947); 670160814Ssimon &_data_word(0xc48cfca8, 0x1a3ff0a0, 0xd82c7d56, 0xef903322); 671160814Ssimon &_data_word(0xc74e4987, 0xc1d138d9, 0xfea2ca8c, 0x360bd498); 672160814Ssimon &_data_word(0xcf81f5a6, 0x28de7aa5, 0x268eb7da, 0xa4bfad3f); 673160814Ssimon &_data_word(0xe49d3a2c, 0x0d927850, 0x9bcc5f6a, 0x62467e54); 674160814Ssimon &_data_word(0xc2138df6, 0xe8b8d890, 0x5ef7392e, 0xf5afc382); 675160814Ssimon &_data_word(0xbe805d9f, 0x7c93d069, 0xa92dd56f, 0xb31225cf); 676160814Ssimon &_data_word(0x3b99acc8, 0xa77d1810, 0x6e639ce8, 0x7bbb3bdb); 677160814Ssimon &_data_word(0x097826cd, 0xf418596e, 0x01b79aec, 0xa89a4f83); 678160814Ssimon &_data_word(0x656e95e6, 0x7ee6ffaa, 0x08cfbc21, 0xe6e815ef); 679160814Ssimon &_data_word(0xd99be7ba, 0xce366f4a, 0xd4099fea, 0xd67cb029); 680160814Ssimon &_data_word(0xafb2a431, 0x31233f2a, 0x3094a5c6, 0xc066a235); 681160814Ssimon &_data_word(0x37bc4e74, 0xa6ca82fc, 0xb0d090e0, 0x15d8a733); 682160814Ssimon &_data_word(0x4a9804f1, 0xf7daec41, 0x0e50cd7f, 0x2ff69117); 683160814Ssimon &_data_word(0x8dd64d76, 0x4db0ef43, 0x544daacc, 0xdf0496e4); 684160814Ssimon &_data_word(0xe3b5d19e, 0x1b886a4c, 0xb81f2cc1, 0x7f516546); 685160814Ssimon &_data_word(0x04ea5e9d, 0x5d358c01, 0x737487fa, 0x2e410bfb); 686160814Ssimon &_data_word(0x5a1d67b3, 0x52d2db92, 0x335610e9, 0x1347d66d); 687160814Ssimon &_data_word(0x8c61d79a, 0x7a0ca137, 0x8e14f859, 0x893c13eb); 688160814Ssimon &_data_word(0xee27a9ce, 0x35c961b7, 0xede51ce1, 0x3cb1477a); 689160814Ssimon &_data_word(0x59dfd29c, 0x3f73f255, 0x79ce1418, 0xbf37c773); 690160814Ssimon &_data_word(0xeacdf753, 0x5baafd5f, 0x146f3ddf, 0x86db4478); 691160814Ssimon &_data_word(0x81f3afca, 0x3ec468b9, 0x2c342438, 0x5f40a3c2); 692160814Ssimon &_data_word(0x72c31d16, 0x0c25e2bc, 0x8b493c28, 0x41950dff); 693160814Ssimon &_data_word(0x7101a839, 0xdeb30c08, 0x9ce4b4d8, 0x90c15664); 694160814Ssimon &_data_word(0x6184cb7b, 0x70b632d5, 0x745c6c48, 0x4257b8d0); 695160814Ssimon#Td4: 696162911Ssimon &data_byte(0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38); 697162911Ssimon &data_byte(0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb); 698162911Ssimon &data_byte(0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87); 699162911Ssimon &data_byte(0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb); 700162911Ssimon &data_byte(0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d); 701162911Ssimon &data_byte(0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e); 702162911Ssimon &data_byte(0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2); 703162911Ssimon &data_byte(0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25); 704162911Ssimon &data_byte(0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16); 705162911Ssimon &data_byte(0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92); 706162911Ssimon &data_byte(0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda); 707162911Ssimon &data_byte(0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84); 708162911Ssimon &data_byte(0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a); 709162911Ssimon &data_byte(0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06); 710162911Ssimon &data_byte(0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02); 711162911Ssimon &data_byte(0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b); 712162911Ssimon &data_byte(0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea); 713162911Ssimon &data_byte(0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73); 714162911Ssimon &data_byte(0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85); 715162911Ssimon &data_byte(0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e); 716162911Ssimon &data_byte(0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89); 717162911Ssimon &data_byte(0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b); 718162911Ssimon &data_byte(0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20); 719162911Ssimon &data_byte(0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4); 720162911Ssimon &data_byte(0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31); 721162911Ssimon &data_byte(0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f); 722162911Ssimon &data_byte(0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d); 723162911Ssimon &data_byte(0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef); 724162911Ssimon &data_byte(0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0); 725162911Ssimon &data_byte(0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61); 726162911Ssimon &data_byte(0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26); 727162911Ssimon &data_byte(0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d); 728160814Ssimon&function_end_B("_x86_AES_decrypt"); 729160814Ssimon 730160814Ssimon# void AES_decrypt (const void *inp,void *out,const AES_KEY *key); 731160814Ssimon&public_label("AES_Td"); 732160814Ssimon&function_begin("AES_decrypt"); 733160814Ssimon &mov ($acc,&wparam(0)); # load inp 734160814Ssimon &mov ($key,&wparam(2)); # load key 735160814Ssimon 736160814Ssimon &mov ($s0,"esp"); 737160814Ssimon &sub ("esp",24); 738160814Ssimon &and ("esp",-64); 739160814Ssimon &add ("esp",4); 740160814Ssimon &mov (&DWP(16,"esp"),$s0); 741160814Ssimon 742160814Ssimon &call (&label("pic_point")); # make it PIC! 743160814Ssimon &set_label("pic_point"); 744160814Ssimon &blindpop("ebp"); 745160814Ssimon &lea ("ebp",&DWP(&label("AES_Td")."-".&label("pic_point"),"ebp")); 746160814Ssimon 747162911Ssimon # prefetch Td4 748162911Ssimon &lea ("ebp",&DWP(2048+128,"ebp")); 749162911Ssimon &mov ($s0,&DWP(0-128,"ebp")); 750162911Ssimon &mov ($s1,&DWP(32-128,"ebp")); 751162911Ssimon &mov ($s2,&DWP(64-128,"ebp")); 752162911Ssimon &mov ($s3,&DWP(96-128,"ebp")); 753162911Ssimon &mov ($s0,&DWP(128-128,"ebp")); 754162911Ssimon &mov ($s1,&DWP(160-128,"ebp")); 755162911Ssimon &mov ($s2,&DWP(192-128,"ebp")); 756162911Ssimon &mov ($s3,&DWP(224-128,"ebp")); 757162911Ssimon &lea ("ebp",&DWP(-2048-128,"ebp")); 758162911Ssimon 759160814Ssimon &mov ($s0,&DWP(0,$acc)); # load input data 760160814Ssimon &mov ($s1,&DWP(4,$acc)); 761160814Ssimon &mov ($s2,&DWP(8,$acc)); 762160814Ssimon &mov ($s3,&DWP(12,$acc)); 763160814Ssimon 764160814Ssimon &call ("_x86_AES_decrypt"); 765160814Ssimon 766160814Ssimon &mov ("esp",&DWP(16,"esp")); 767160814Ssimon 768160814Ssimon &mov ($acc,&wparam(1)); # load out 769160814Ssimon &mov (&DWP(0,$acc),$s0); # write output data 770160814Ssimon &mov (&DWP(4,$acc),$s1); 771160814Ssimon &mov (&DWP(8,$acc),$s2); 772160814Ssimon &mov (&DWP(12,$acc),$s3); 773160814Ssimon&function_end("AES_decrypt"); 774160814Ssimon 775160814Ssimon# void AES_cbc_encrypt (const void char *inp, unsigned char *out, 776160814Ssimon# size_t length, const AES_KEY *key, 777160814Ssimon# unsigned char *ivp,const int enc); 778160814Ssimon{ 779160814Ssimon# stack frame layout 780160814Ssimon# -4(%esp) 0(%esp) return address 781160814Ssimon# 0(%esp) 4(%esp) tmp1 782160814Ssimon# 4(%esp) 8(%esp) tmp2 783160814Ssimon# 8(%esp) 12(%esp) key 784160814Ssimon# 12(%esp) 16(%esp) end of key schedule 785160814Ssimonmy $_esp=&DWP(16,"esp"); #saved %esp 786160814Ssimonmy $_inp=&DWP(20,"esp"); #copy of wparam(0) 787160814Ssimonmy $_out=&DWP(24,"esp"); #copy of wparam(1) 788160814Ssimonmy $_len=&DWP(28,"esp"); #copy of wparam(2) 789160814Ssimonmy $_key=&DWP(32,"esp"); #copy of wparam(3) 790160814Ssimonmy $_ivp=&DWP(36,"esp"); #copy of wparam(4) 791160814Ssimonmy $_tmp=&DWP(40,"esp"); #volatile variable 792160814Ssimonmy $ivec=&DWP(44,"esp"); #ivec[16] 793160814Ssimonmy $aes_key=&DWP(60,"esp"); #copy of aes_key 794162911Ssimonmy $mark=&DWP(60+240,"esp"); #copy of aes_key->rounds 795160814Ssimon 796160814Ssimon&public_label("AES_Te"); 797160814Ssimon&public_label("AES_Td"); 798160814Ssimon&function_begin("AES_cbc_encrypt"); 799160814Ssimon &mov ($s2 eq "ecx"? $s2 : "",&wparam(2)); # load len 800160814Ssimon &cmp ($s2,0); 801160814Ssimon &je (&label("enc_out")); 802160814Ssimon 803160814Ssimon &call (&label("pic_point")); # make it PIC! 804160814Ssimon &set_label("pic_point"); 805160814Ssimon &blindpop("ebp"); 806160814Ssimon 807160814Ssimon &pushf (); 808160814Ssimon &cld (); 809160814Ssimon 810160814Ssimon &cmp (&wparam(5),0); 811160814Ssimon &je (&label("DECRYPT")); 812160814Ssimon 813160814Ssimon &lea ("ebp",&DWP(&label("AES_Te")."-".&label("pic_point"),"ebp")); 814160814Ssimon 815160814Ssimon # allocate aligned stack frame... 816160814Ssimon &lea ($key,&DWP(-64-244,"esp")); 817160814Ssimon &and ($key,-64); 818160814Ssimon 819160814Ssimon # ... and make sure it doesn't alias with AES_Te modulo 4096 820160814Ssimon &mov ($s0,"ebp"); 821160814Ssimon &lea ($s1,&DWP(2048,"ebp")); 822160814Ssimon &mov ($s3,$key); 823160814Ssimon &and ($s0,0xfff); # s = %ebp&0xfff 824160814Ssimon &and ($s1,0xfff); # e = (%ebp+2048)&0xfff 825160814Ssimon &and ($s3,0xfff); # p = %esp&0xfff 826160814Ssimon 827160814Ssimon &cmp ($s3,$s1); # if (p>=e) %esp =- (p-e); 828160814Ssimon &jb (&label("te_break_out")); 829160814Ssimon &sub ($s3,$s1); 830160814Ssimon &sub ($key,$s3); 831160814Ssimon &jmp (&label("te_ok")); 832160814Ssimon &set_label("te_break_out"); # else %esp -= (p-s)&0xfff + framesz; 833160814Ssimon &sub ($s3,$s0); 834160814Ssimon &and ($s3,0xfff); 835160814Ssimon &add ($s3,64+256); 836160814Ssimon &sub ($key,$s3); 837160814Ssimon &align (4); 838160814Ssimon &set_label("te_ok"); 839160814Ssimon 840160814Ssimon &mov ($s0,&wparam(0)); # load inp 841160814Ssimon &mov ($s1,&wparam(1)); # load out 842160814Ssimon &mov ($s3,&wparam(3)); # load key 843160814Ssimon &mov ($acc,&wparam(4)); # load ivp 844160814Ssimon 845160814Ssimon &exch ("esp",$key); 846160814Ssimon &add ("esp",4); # reserve for return address! 847160814Ssimon &mov ($_esp,$key); # save %esp 848160814Ssimon 849160814Ssimon &mov ($_inp,$s0); # save copy of inp 850160814Ssimon &mov ($_out,$s1); # save copy of out 851160814Ssimon &mov ($_len,$s2); # save copy of len 852160814Ssimon &mov ($_key,$s3); # save copy of key 853160814Ssimon &mov ($_ivp,$acc); # save copy of ivp 854160814Ssimon 855162911Ssimon &mov ($mark,0); # copy of aes_key->rounds = 0; 856160814Ssimon if ($compromise) { 857160814Ssimon &cmp ($s2,$compromise); 858160814Ssimon &jb (&label("skip_ecopy")); 859160814Ssimon } 860162911Ssimon # do we copy key schedule to stack? 861162911Ssimon &mov ($s1 eq "ebx" ? $s1 : "",$s3); 862162911Ssimon &mov ($s2 eq "ecx" ? $s2 : "",244/4); 863162911Ssimon &sub ($s1,"ebp"); 864160814Ssimon &mov ("esi",$s3); 865162911Ssimon &and ($s1,0xfff); 866160814Ssimon &lea ("edi",$aes_key); 867162911Ssimon &cmp ($s1,2048); 868162911Ssimon &jb (&label("do_ecopy")); 869162911Ssimon &cmp ($s1,4096-244); 870162911Ssimon &jb (&label("skip_ecopy")); 871160814Ssimon &align (4); 872162911Ssimon &set_label("do_ecopy"); 873162911Ssimon &mov ($_key,"edi"); 874162911Ssimon &data_word(0xA5F3F689); # rep movsd 875162911Ssimon &set_label("skip_ecopy"); 876160814Ssimon 877160814Ssimon &mov ($acc,$s0); 878160814Ssimon &mov ($key,16); 879160814Ssimon &align (4); 880160814Ssimon &set_label("prefetch_te"); 881160814Ssimon &mov ($s0,&DWP(0,"ebp")); 882160814Ssimon &mov ($s1,&DWP(32,"ebp")); 883160814Ssimon &mov ($s2,&DWP(64,"ebp")); 884160814Ssimon &mov ($s3,&DWP(96,"ebp")); 885160814Ssimon &lea ("ebp",&DWP(128,"ebp")); 886160814Ssimon &dec ($key); 887160814Ssimon &jnz (&label("prefetch_te")); 888160814Ssimon &sub ("ebp",2048); 889160814Ssimon 890160814Ssimon &mov ($s2,$_len); 891160814Ssimon &mov ($key,$_ivp); 892160814Ssimon &test ($s2,0xFFFFFFF0); 893160814Ssimon &jz (&label("enc_tail")); # short input... 894160814Ssimon 895160814Ssimon &mov ($s0,&DWP(0,$key)); # load iv 896160814Ssimon &mov ($s1,&DWP(4,$key)); 897160814Ssimon 898160814Ssimon &align (4); 899160814Ssimon &set_label("enc_loop"); 900160814Ssimon &mov ($s2,&DWP(8,$key)); 901160814Ssimon &mov ($s3,&DWP(12,$key)); 902160814Ssimon 903160814Ssimon &xor ($s0,&DWP(0,$acc)); # xor input data 904160814Ssimon &xor ($s1,&DWP(4,$acc)); 905160814Ssimon &xor ($s2,&DWP(8,$acc)); 906160814Ssimon &xor ($s3,&DWP(12,$acc)); 907160814Ssimon 908160814Ssimon &mov ($key,$_key); # load key 909160814Ssimon &call ("_x86_AES_encrypt"); 910160814Ssimon 911160814Ssimon &mov ($acc,$_inp); # load inp 912160814Ssimon &mov ($key,$_out); # load out 913160814Ssimon 914160814Ssimon &mov (&DWP(0,$key),$s0); # save output data 915160814Ssimon &mov (&DWP(4,$key),$s1); 916160814Ssimon &mov (&DWP(8,$key),$s2); 917160814Ssimon &mov (&DWP(12,$key),$s3); 918160814Ssimon 919160814Ssimon &mov ($s2,$_len); # load len 920160814Ssimon 921160814Ssimon &lea ($acc,&DWP(16,$acc)); 922160814Ssimon &mov ($_inp,$acc); # save inp 923160814Ssimon 924160814Ssimon &lea ($s3,&DWP(16,$key)); 925160814Ssimon &mov ($_out,$s3); # save out 926160814Ssimon 927160814Ssimon &sub ($s2,16); 928160814Ssimon &test ($s2,0xFFFFFFF0); 929160814Ssimon &mov ($_len,$s2); # save len 930160814Ssimon &jnz (&label("enc_loop")); 931160814Ssimon &test ($s2,15); 932160814Ssimon &jnz (&label("enc_tail")); 933160814Ssimon &mov ($acc,$_ivp); # load ivp 934160814Ssimon &mov ($s2,&DWP(8,$key)); # restore last dwords 935160814Ssimon &mov ($s3,&DWP(12,$key)); 936160814Ssimon &mov (&DWP(0,$acc),$s0); # save ivec 937160814Ssimon &mov (&DWP(4,$acc),$s1); 938160814Ssimon &mov (&DWP(8,$acc),$s2); 939160814Ssimon &mov (&DWP(12,$acc),$s3); 940160814Ssimon 941162911Ssimon &cmp ($mark,0); # was the key schedule copied? 942160814Ssimon &mov ("edi",$_key); 943162911Ssimon &je (&label("skip_ezero")); 944160814Ssimon # zero copy of key schedule 945160814Ssimon &mov ("ecx",240/4); 946160814Ssimon &xor ("eax","eax"); 947160814Ssimon &align (4); 948162911Ssimon &data_word(0xABF3F689); # rep stosd 949162911Ssimon &set_label("skip_ezero") 950194206Ssimon &mov ("esp",$_esp); 951160814Ssimon &popf (); 952160814Ssimon &set_label("enc_out"); 953160814Ssimon &function_end_A(); 954160814Ssimon &pushf (); # kludge, never executed 955160814Ssimon 956160814Ssimon &align (4); 957160814Ssimon &set_label("enc_tail"); 958194206Ssimon &mov ($s0,$key eq "edi" ? $key : ""); 959160814Ssimon &mov ($key,$_out); # load out 960194206Ssimon &push ($s0); # push ivp 961160814Ssimon &mov ($s1,16); 962160814Ssimon &sub ($s1,$s2); 963160814Ssimon &cmp ($key,$acc); # compare with inp 964160814Ssimon &je (&label("enc_in_place")); 965160814Ssimon &align (4); 966162911Ssimon &data_word(0xA4F3F689); # rep movsb # copy input 967160814Ssimon &jmp (&label("enc_skip_in_place")); 968160814Ssimon &set_label("enc_in_place"); 969160814Ssimon &lea ($key,&DWP(0,$key,$s2)); 970160814Ssimon &set_label("enc_skip_in_place"); 971160814Ssimon &mov ($s2,$s1); 972160814Ssimon &xor ($s0,$s0); 973160814Ssimon &align (4); 974162911Ssimon &data_word(0xAAF3F689); # rep stosb # zero tail 975160814Ssimon &pop ($key); # pop ivp 976160814Ssimon 977160814Ssimon &mov ($acc,$_out); # output as input 978160814Ssimon &mov ($s0,&DWP(0,$key)); 979160814Ssimon &mov ($s1,&DWP(4,$key)); 980160814Ssimon &mov ($_len,16); # len=16 981160814Ssimon &jmp (&label("enc_loop")); # one more spin... 982160814Ssimon 983160814Ssimon#----------------------------- DECRYPT -----------------------------# 984160814Ssimon&align (4); 985160814Ssimon&set_label("DECRYPT"); 986160814Ssimon &lea ("ebp",&DWP(&label("AES_Td")."-".&label("pic_point"),"ebp")); 987160814Ssimon 988160814Ssimon # allocate aligned stack frame... 989160814Ssimon &lea ($key,&DWP(-64-244,"esp")); 990160814Ssimon &and ($key,-64); 991160814Ssimon 992160814Ssimon # ... and make sure it doesn't alias with AES_Td modulo 4096 993160814Ssimon &mov ($s0,"ebp"); 994162911Ssimon &lea ($s1,&DWP(2048+256,"ebp")); 995160814Ssimon &mov ($s3,$key); 996160814Ssimon &and ($s0,0xfff); # s = %ebp&0xfff 997162911Ssimon &and ($s1,0xfff); # e = (%ebp+2048+256)&0xfff 998160814Ssimon &and ($s3,0xfff); # p = %esp&0xfff 999160814Ssimon 1000160814Ssimon &cmp ($s3,$s1); # if (p>=e) %esp =- (p-e); 1001160814Ssimon &jb (&label("td_break_out")); 1002160814Ssimon &sub ($s3,$s1); 1003160814Ssimon &sub ($key,$s3); 1004160814Ssimon &jmp (&label("td_ok")); 1005160814Ssimon &set_label("td_break_out"); # else %esp -= (p-s)&0xfff + framesz; 1006160814Ssimon &sub ($s3,$s0); 1007160814Ssimon &and ($s3,0xfff); 1008160814Ssimon &add ($s3,64+256); 1009160814Ssimon &sub ($key,$s3); 1010160814Ssimon &align (4); 1011160814Ssimon &set_label("td_ok"); 1012160814Ssimon 1013160814Ssimon &mov ($s0,&wparam(0)); # load inp 1014160814Ssimon &mov ($s1,&wparam(1)); # load out 1015160814Ssimon &mov ($s3,&wparam(3)); # load key 1016160814Ssimon &mov ($acc,&wparam(4)); # load ivp 1017160814Ssimon 1018160814Ssimon &exch ("esp",$key); 1019160814Ssimon &add ("esp",4); # reserve for return address! 1020160814Ssimon &mov ($_esp,$key); # save %esp 1021160814Ssimon 1022160814Ssimon &mov ($_inp,$s0); # save copy of inp 1023160814Ssimon &mov ($_out,$s1); # save copy of out 1024160814Ssimon &mov ($_len,$s2); # save copy of len 1025160814Ssimon &mov ($_key,$s3); # save copy of key 1026160814Ssimon &mov ($_ivp,$acc); # save copy of ivp 1027160814Ssimon 1028162911Ssimon &mov ($mark,0); # copy of aes_key->rounds = 0; 1029160814Ssimon if ($compromise) { 1030160814Ssimon &cmp ($s2,$compromise); 1031160814Ssimon &jb (&label("skip_dcopy")); 1032160814Ssimon } 1033162911Ssimon # do we copy key schedule to stack? 1034162911Ssimon &mov ($s1 eq "ebx" ? $s1 : "",$s3); 1035162911Ssimon &mov ($s2 eq "ecx" ? $s2 : "",244/4); 1036162911Ssimon &sub ($s1,"ebp"); 1037160814Ssimon &mov ("esi",$s3); 1038162911Ssimon &and ($s1,0xfff); 1039160814Ssimon &lea ("edi",$aes_key); 1040162911Ssimon &cmp ($s1,2048+256); 1041162911Ssimon &jb (&label("do_dcopy")); 1042162911Ssimon &cmp ($s1,4096-244); 1043162911Ssimon &jb (&label("skip_dcopy")); 1044160814Ssimon &align (4); 1045162911Ssimon &set_label("do_dcopy"); 1046162911Ssimon &mov ($_key,"edi"); 1047162911Ssimon &data_word(0xA5F3F689); # rep movsd 1048162911Ssimon &set_label("skip_dcopy"); 1049160814Ssimon 1050160814Ssimon &mov ($acc,$s0); 1051162911Ssimon &mov ($key,18); 1052160814Ssimon &align (4); 1053160814Ssimon &set_label("prefetch_td"); 1054160814Ssimon &mov ($s0,&DWP(0,"ebp")); 1055160814Ssimon &mov ($s1,&DWP(32,"ebp")); 1056160814Ssimon &mov ($s2,&DWP(64,"ebp")); 1057160814Ssimon &mov ($s3,&DWP(96,"ebp")); 1058160814Ssimon &lea ("ebp",&DWP(128,"ebp")); 1059160814Ssimon &dec ($key); 1060160814Ssimon &jnz (&label("prefetch_td")); 1061162911Ssimon &sub ("ebp",2048+256); 1062160814Ssimon 1063160814Ssimon &cmp ($acc,$_out); 1064160814Ssimon &je (&label("dec_in_place")); # in-place processing... 1065160814Ssimon 1066160814Ssimon &mov ($key,$_ivp); # load ivp 1067160814Ssimon &mov ($_tmp,$key); 1068160814Ssimon 1069160814Ssimon &align (4); 1070160814Ssimon &set_label("dec_loop"); 1071160814Ssimon &mov ($s0,&DWP(0,$acc)); # read input 1072160814Ssimon &mov ($s1,&DWP(4,$acc)); 1073160814Ssimon &mov ($s2,&DWP(8,$acc)); 1074160814Ssimon &mov ($s3,&DWP(12,$acc)); 1075160814Ssimon 1076160814Ssimon &mov ($key,$_key); # load key 1077160814Ssimon &call ("_x86_AES_decrypt"); 1078160814Ssimon 1079160814Ssimon &mov ($key,$_tmp); # load ivp 1080160814Ssimon &mov ($acc,$_len); # load len 1081160814Ssimon &xor ($s0,&DWP(0,$key)); # xor iv 1082160814Ssimon &xor ($s1,&DWP(4,$key)); 1083160814Ssimon &xor ($s2,&DWP(8,$key)); 1084160814Ssimon &xor ($s3,&DWP(12,$key)); 1085160814Ssimon 1086160814Ssimon &sub ($acc,16); 1087160814Ssimon &jc (&label("dec_partial")); 1088160814Ssimon &mov ($_len,$acc); # save len 1089160814Ssimon &mov ($acc,$_inp); # load inp 1090160814Ssimon &mov ($key,$_out); # load out 1091160814Ssimon 1092160814Ssimon &mov (&DWP(0,$key),$s0); # write output 1093160814Ssimon &mov (&DWP(4,$key),$s1); 1094160814Ssimon &mov (&DWP(8,$key),$s2); 1095160814Ssimon &mov (&DWP(12,$key),$s3); 1096160814Ssimon 1097160814Ssimon &mov ($_tmp,$acc); # save ivp 1098160814Ssimon &lea ($acc,&DWP(16,$acc)); 1099160814Ssimon &mov ($_inp,$acc); # save inp 1100160814Ssimon 1101160814Ssimon &lea ($key,&DWP(16,$key)); 1102160814Ssimon &mov ($_out,$key); # save out 1103160814Ssimon 1104160814Ssimon &jnz (&label("dec_loop")); 1105160814Ssimon &mov ($key,$_tmp); # load temp ivp 1106160814Ssimon &set_label("dec_end"); 1107160814Ssimon &mov ($acc,$_ivp); # load user ivp 1108160814Ssimon &mov ($s0,&DWP(0,$key)); # load iv 1109160814Ssimon &mov ($s1,&DWP(4,$key)); 1110160814Ssimon &mov ($s2,&DWP(8,$key)); 1111160814Ssimon &mov ($s3,&DWP(12,$key)); 1112160814Ssimon &mov (&DWP(0,$acc),$s0); # copy back to user 1113160814Ssimon &mov (&DWP(4,$acc),$s1); 1114160814Ssimon &mov (&DWP(8,$acc),$s2); 1115160814Ssimon &mov (&DWP(12,$acc),$s3); 1116160814Ssimon &jmp (&label("dec_out")); 1117160814Ssimon 1118160814Ssimon &align (4); 1119160814Ssimon &set_label("dec_partial"); 1120160814Ssimon &lea ($key,$ivec); 1121160814Ssimon &mov (&DWP(0,$key),$s0); # dump output to stack 1122160814Ssimon &mov (&DWP(4,$key),$s1); 1123160814Ssimon &mov (&DWP(8,$key),$s2); 1124160814Ssimon &mov (&DWP(12,$key),$s3); 1125160814Ssimon &lea ($s2 eq "ecx" ? $s2 : "",&DWP(16,$acc)); 1126160814Ssimon &mov ($acc eq "esi" ? $acc : "",$key); 1127160814Ssimon &mov ($key eq "edi" ? $key : "",$_out); # load out 1128162911Ssimon &data_word(0xA4F3F689); # rep movsb # copy output 1129160814Ssimon &mov ($key,$_inp); # use inp as temp ivp 1130160814Ssimon &jmp (&label("dec_end")); 1131160814Ssimon 1132160814Ssimon &align (4); 1133160814Ssimon &set_label("dec_in_place"); 1134160814Ssimon &set_label("dec_in_place_loop"); 1135160814Ssimon &lea ($key,$ivec); 1136160814Ssimon &mov ($s0,&DWP(0,$acc)); # read input 1137160814Ssimon &mov ($s1,&DWP(4,$acc)); 1138160814Ssimon &mov ($s2,&DWP(8,$acc)); 1139160814Ssimon &mov ($s3,&DWP(12,$acc)); 1140160814Ssimon 1141160814Ssimon &mov (&DWP(0,$key),$s0); # copy to temp 1142160814Ssimon &mov (&DWP(4,$key),$s1); 1143160814Ssimon &mov (&DWP(8,$key),$s2); 1144160814Ssimon &mov (&DWP(12,$key),$s3); 1145160814Ssimon 1146160814Ssimon &mov ($key,$_key); # load key 1147160814Ssimon &call ("_x86_AES_decrypt"); 1148160814Ssimon 1149160814Ssimon &mov ($key,$_ivp); # load ivp 1150160814Ssimon &mov ($acc,$_out); # load out 1151160814Ssimon &xor ($s0,&DWP(0,$key)); # xor iv 1152160814Ssimon &xor ($s1,&DWP(4,$key)); 1153160814Ssimon &xor ($s2,&DWP(8,$key)); 1154160814Ssimon &xor ($s3,&DWP(12,$key)); 1155160814Ssimon 1156160814Ssimon &mov (&DWP(0,$acc),$s0); # write output 1157160814Ssimon &mov (&DWP(4,$acc),$s1); 1158160814Ssimon &mov (&DWP(8,$acc),$s2); 1159160814Ssimon &mov (&DWP(12,$acc),$s3); 1160160814Ssimon 1161160814Ssimon &lea ($acc,&DWP(16,$acc)); 1162160814Ssimon &mov ($_out,$acc); # save out 1163160814Ssimon 1164160814Ssimon &lea ($acc,$ivec); 1165160814Ssimon &mov ($s0,&DWP(0,$acc)); # read temp 1166160814Ssimon &mov ($s1,&DWP(4,$acc)); 1167160814Ssimon &mov ($s2,&DWP(8,$acc)); 1168160814Ssimon &mov ($s3,&DWP(12,$acc)); 1169160814Ssimon 1170160814Ssimon &mov (&DWP(0,$key),$s0); # copy iv 1171160814Ssimon &mov (&DWP(4,$key),$s1); 1172160814Ssimon &mov (&DWP(8,$key),$s2); 1173160814Ssimon &mov (&DWP(12,$key),$s3); 1174160814Ssimon 1175160814Ssimon &mov ($acc,$_inp); # load inp 1176160814Ssimon 1177160814Ssimon &lea ($acc,&DWP(16,$acc)); 1178160814Ssimon &mov ($_inp,$acc); # save inp 1179160814Ssimon 1180160814Ssimon &mov ($s2,$_len); # load len 1181160814Ssimon &sub ($s2,16); 1182160814Ssimon &jc (&label("dec_in_place_partial")); 1183160814Ssimon &mov ($_len,$s2); # save len 1184160814Ssimon &jnz (&label("dec_in_place_loop")); 1185160814Ssimon &jmp (&label("dec_out")); 1186160814Ssimon 1187160814Ssimon &align (4); 1188160814Ssimon &set_label("dec_in_place_partial"); 1189160814Ssimon # one can argue if this is actually required... 1190160814Ssimon &mov ($key eq "edi" ? $key : "",$_out); 1191160814Ssimon &lea ($acc eq "esi" ? $acc : "",$ivec); 1192160814Ssimon &lea ($key,&DWP(0,$key,$s2)); 1193160814Ssimon &lea ($acc,&DWP(16,$acc,$s2)); 1194160814Ssimon &neg ($s2 eq "ecx" ? $s2 : ""); 1195162911Ssimon &data_word(0xA4F3F689); # rep movsb # restore tail 1196160814Ssimon 1197160814Ssimon &align (4); 1198160814Ssimon &set_label("dec_out"); 1199162911Ssimon &cmp ($mark,0); # was the key schedule copied? 1200160814Ssimon &mov ("edi",$_key); 1201162911Ssimon &je (&label("skip_dzero")); 1202160814Ssimon # zero copy of key schedule 1203160814Ssimon &mov ("ecx",240/4); 1204160814Ssimon &xor ("eax","eax"); 1205160814Ssimon &align (4); 1206162911Ssimon &data_word(0xABF3F689); # rep stosd 1207162911Ssimon &set_label("skip_dzero") 1208194206Ssimon &mov ("esp",$_esp); 1209160814Ssimon &popf (); 1210160814Ssimon&function_end("AES_cbc_encrypt"); 1211160814Ssimon} 1212160814Ssimon 1213160814Ssimon#------------------------------------------------------------------# 1214160814Ssimon 1215160814Ssimonsub enckey() 1216160814Ssimon{ 1217160814Ssimon &movz ("esi",&LB("edx")); # rk[i]>>0 1218160814Ssimon &mov ("ebx",&DWP(2,"ebp","esi",8)); 1219160814Ssimon &movz ("esi",&HB("edx")); # rk[i]>>8 1220160814Ssimon &and ("ebx",0xFF000000); 1221160814Ssimon &xor ("eax","ebx"); 1222160814Ssimon 1223160814Ssimon &mov ("ebx",&DWP(2,"ebp","esi",8)); 1224160814Ssimon &shr ("edx",16); 1225160814Ssimon &and ("ebx",0x000000FF); 1226160814Ssimon &movz ("esi",&LB("edx")); # rk[i]>>16 1227160814Ssimon &xor ("eax","ebx"); 1228160814Ssimon 1229160814Ssimon &mov ("ebx",&DWP(0,"ebp","esi",8)); 1230160814Ssimon &movz ("esi",&HB("edx")); # rk[i]>>24 1231160814Ssimon &and ("ebx",0x0000FF00); 1232160814Ssimon &xor ("eax","ebx"); 1233160814Ssimon 1234160814Ssimon &mov ("ebx",&DWP(0,"ebp","esi",8)); 1235160814Ssimon &and ("ebx",0x00FF0000); 1236160814Ssimon &xor ("eax","ebx"); 1237160814Ssimon 1238160814Ssimon &xor ("eax",&DWP(2048,"ebp","ecx",4)); # rcon 1239160814Ssimon} 1240160814Ssimon 1241160814Ssimon# int AES_set_encrypt_key(const unsigned char *userKey, const int bits, 1242160814Ssimon# AES_KEY *key) 1243160814Ssimon&public_label("AES_Te"); 1244160814Ssimon&function_begin("AES_set_encrypt_key"); 1245160814Ssimon &mov ("esi",&wparam(0)); # user supplied key 1246160814Ssimon &mov ("edi",&wparam(2)); # private key schedule 1247160814Ssimon 1248160814Ssimon &test ("esi",-1); 1249160814Ssimon &jz (&label("badpointer")); 1250160814Ssimon &test ("edi",-1); 1251160814Ssimon &jz (&label("badpointer")); 1252160814Ssimon 1253160814Ssimon &call (&label("pic_point")); 1254160814Ssimon &set_label("pic_point"); 1255160814Ssimon &blindpop("ebp"); 1256160814Ssimon &lea ("ebp",&DWP(&label("AES_Te")."-".&label("pic_point"),"ebp")); 1257160814Ssimon 1258160814Ssimon &mov ("ecx",&wparam(1)); # number of bits in key 1259160814Ssimon &cmp ("ecx",128); 1260160814Ssimon &je (&label("10rounds")); 1261160814Ssimon &cmp ("ecx",192); 1262160814Ssimon &je (&label("12rounds")); 1263160814Ssimon &cmp ("ecx",256); 1264160814Ssimon &je (&label("14rounds")); 1265160814Ssimon &mov ("eax",-2); # invalid number of bits 1266160814Ssimon &jmp (&label("exit")); 1267160814Ssimon 1268160814Ssimon &set_label("10rounds"); 1269160814Ssimon &mov ("eax",&DWP(0,"esi")); # copy first 4 dwords 1270160814Ssimon &mov ("ebx",&DWP(4,"esi")); 1271160814Ssimon &mov ("ecx",&DWP(8,"esi")); 1272160814Ssimon &mov ("edx",&DWP(12,"esi")); 1273160814Ssimon &mov (&DWP(0,"edi"),"eax"); 1274160814Ssimon &mov (&DWP(4,"edi"),"ebx"); 1275160814Ssimon &mov (&DWP(8,"edi"),"ecx"); 1276160814Ssimon &mov (&DWP(12,"edi"),"edx"); 1277160814Ssimon 1278160814Ssimon &xor ("ecx","ecx"); 1279160814Ssimon &jmp (&label("10shortcut")); 1280160814Ssimon 1281160814Ssimon &align (4); 1282160814Ssimon &set_label("10loop"); 1283160814Ssimon &mov ("eax",&DWP(0,"edi")); # rk[0] 1284160814Ssimon &mov ("edx",&DWP(12,"edi")); # rk[3] 1285160814Ssimon &set_label("10shortcut"); 1286160814Ssimon &enckey (); 1287160814Ssimon 1288160814Ssimon &mov (&DWP(16,"edi"),"eax"); # rk[4] 1289160814Ssimon &xor ("eax",&DWP(4,"edi")); 1290160814Ssimon &mov (&DWP(20,"edi"),"eax"); # rk[5] 1291160814Ssimon &xor ("eax",&DWP(8,"edi")); 1292160814Ssimon &mov (&DWP(24,"edi"),"eax"); # rk[6] 1293160814Ssimon &xor ("eax",&DWP(12,"edi")); 1294160814Ssimon &mov (&DWP(28,"edi"),"eax"); # rk[7] 1295160814Ssimon &inc ("ecx"); 1296160814Ssimon &add ("edi",16); 1297160814Ssimon &cmp ("ecx",10); 1298160814Ssimon &jl (&label("10loop")); 1299160814Ssimon 1300160814Ssimon &mov (&DWP(80,"edi"),10); # setup number of rounds 1301160814Ssimon &xor ("eax","eax"); 1302160814Ssimon &jmp (&label("exit")); 1303160814Ssimon 1304160814Ssimon &set_label("12rounds"); 1305160814Ssimon &mov ("eax",&DWP(0,"esi")); # copy first 6 dwords 1306160814Ssimon &mov ("ebx",&DWP(4,"esi")); 1307160814Ssimon &mov ("ecx",&DWP(8,"esi")); 1308160814Ssimon &mov ("edx",&DWP(12,"esi")); 1309160814Ssimon &mov (&DWP(0,"edi"),"eax"); 1310160814Ssimon &mov (&DWP(4,"edi"),"ebx"); 1311160814Ssimon &mov (&DWP(8,"edi"),"ecx"); 1312160814Ssimon &mov (&DWP(12,"edi"),"edx"); 1313160814Ssimon &mov ("ecx",&DWP(16,"esi")); 1314160814Ssimon &mov ("edx",&DWP(20,"esi")); 1315160814Ssimon &mov (&DWP(16,"edi"),"ecx"); 1316160814Ssimon &mov (&DWP(20,"edi"),"edx"); 1317160814Ssimon 1318160814Ssimon &xor ("ecx","ecx"); 1319160814Ssimon &jmp (&label("12shortcut")); 1320160814Ssimon 1321160814Ssimon &align (4); 1322160814Ssimon &set_label("12loop"); 1323160814Ssimon &mov ("eax",&DWP(0,"edi")); # rk[0] 1324160814Ssimon &mov ("edx",&DWP(20,"edi")); # rk[5] 1325160814Ssimon &set_label("12shortcut"); 1326160814Ssimon &enckey (); 1327160814Ssimon 1328160814Ssimon &mov (&DWP(24,"edi"),"eax"); # rk[6] 1329160814Ssimon &xor ("eax",&DWP(4,"edi")); 1330160814Ssimon &mov (&DWP(28,"edi"),"eax"); # rk[7] 1331160814Ssimon &xor ("eax",&DWP(8,"edi")); 1332160814Ssimon &mov (&DWP(32,"edi"),"eax"); # rk[8] 1333160814Ssimon &xor ("eax",&DWP(12,"edi")); 1334160814Ssimon &mov (&DWP(36,"edi"),"eax"); # rk[9] 1335160814Ssimon 1336160814Ssimon &cmp ("ecx",7); 1337160814Ssimon &je (&label("12break")); 1338160814Ssimon &inc ("ecx"); 1339160814Ssimon 1340160814Ssimon &xor ("eax",&DWP(16,"edi")); 1341160814Ssimon &mov (&DWP(40,"edi"),"eax"); # rk[10] 1342160814Ssimon &xor ("eax",&DWP(20,"edi")); 1343160814Ssimon &mov (&DWP(44,"edi"),"eax"); # rk[11] 1344160814Ssimon 1345160814Ssimon &add ("edi",24); 1346160814Ssimon &jmp (&label("12loop")); 1347160814Ssimon 1348160814Ssimon &set_label("12break"); 1349160814Ssimon &mov (&DWP(72,"edi"),12); # setup number of rounds 1350160814Ssimon &xor ("eax","eax"); 1351160814Ssimon &jmp (&label("exit")); 1352160814Ssimon 1353160814Ssimon &set_label("14rounds"); 1354160814Ssimon &mov ("eax",&DWP(0,"esi")); # copy first 8 dwords 1355160814Ssimon &mov ("ebx",&DWP(4,"esi")); 1356160814Ssimon &mov ("ecx",&DWP(8,"esi")); 1357160814Ssimon &mov ("edx",&DWP(12,"esi")); 1358160814Ssimon &mov (&DWP(0,"edi"),"eax"); 1359160814Ssimon &mov (&DWP(4,"edi"),"ebx"); 1360160814Ssimon &mov (&DWP(8,"edi"),"ecx"); 1361160814Ssimon &mov (&DWP(12,"edi"),"edx"); 1362160814Ssimon &mov ("eax",&DWP(16,"esi")); 1363160814Ssimon &mov ("ebx",&DWP(20,"esi")); 1364160814Ssimon &mov ("ecx",&DWP(24,"esi")); 1365160814Ssimon &mov ("edx",&DWP(28,"esi")); 1366160814Ssimon &mov (&DWP(16,"edi"),"eax"); 1367160814Ssimon &mov (&DWP(20,"edi"),"ebx"); 1368160814Ssimon &mov (&DWP(24,"edi"),"ecx"); 1369160814Ssimon &mov (&DWP(28,"edi"),"edx"); 1370160814Ssimon 1371160814Ssimon &xor ("ecx","ecx"); 1372160814Ssimon &jmp (&label("14shortcut")); 1373160814Ssimon 1374160814Ssimon &align (4); 1375160814Ssimon &set_label("14loop"); 1376160814Ssimon &mov ("edx",&DWP(28,"edi")); # rk[7] 1377160814Ssimon &set_label("14shortcut"); 1378160814Ssimon &mov ("eax",&DWP(0,"edi")); # rk[0] 1379160814Ssimon 1380160814Ssimon &enckey (); 1381160814Ssimon 1382160814Ssimon &mov (&DWP(32,"edi"),"eax"); # rk[8] 1383160814Ssimon &xor ("eax",&DWP(4,"edi")); 1384160814Ssimon &mov (&DWP(36,"edi"),"eax"); # rk[9] 1385160814Ssimon &xor ("eax",&DWP(8,"edi")); 1386160814Ssimon &mov (&DWP(40,"edi"),"eax"); # rk[10] 1387160814Ssimon &xor ("eax",&DWP(12,"edi")); 1388160814Ssimon &mov (&DWP(44,"edi"),"eax"); # rk[11] 1389160814Ssimon 1390160814Ssimon &cmp ("ecx",6); 1391160814Ssimon &je (&label("14break")); 1392160814Ssimon &inc ("ecx"); 1393160814Ssimon 1394160814Ssimon &mov ("edx","eax"); 1395160814Ssimon &mov ("eax",&DWP(16,"edi")); # rk[4] 1396160814Ssimon &movz ("esi",&LB("edx")); # rk[11]>>0 1397160814Ssimon &mov ("ebx",&DWP(2,"ebp","esi",8)); 1398160814Ssimon &movz ("esi",&HB("edx")); # rk[11]>>8 1399160814Ssimon &and ("ebx",0x000000FF); 1400160814Ssimon &xor ("eax","ebx"); 1401160814Ssimon 1402160814Ssimon &mov ("ebx",&DWP(0,"ebp","esi",8)); 1403160814Ssimon &shr ("edx",16); 1404160814Ssimon &and ("ebx",0x0000FF00); 1405160814Ssimon &movz ("esi",&LB("edx")); # rk[11]>>16 1406160814Ssimon &xor ("eax","ebx"); 1407160814Ssimon 1408160814Ssimon &mov ("ebx",&DWP(0,"ebp","esi",8)); 1409160814Ssimon &movz ("esi",&HB("edx")); # rk[11]>>24 1410160814Ssimon &and ("ebx",0x00FF0000); 1411160814Ssimon &xor ("eax","ebx"); 1412160814Ssimon 1413160814Ssimon &mov ("ebx",&DWP(2,"ebp","esi",8)); 1414160814Ssimon &and ("ebx",0xFF000000); 1415160814Ssimon &xor ("eax","ebx"); 1416160814Ssimon 1417160814Ssimon &mov (&DWP(48,"edi"),"eax"); # rk[12] 1418160814Ssimon &xor ("eax",&DWP(20,"edi")); 1419160814Ssimon &mov (&DWP(52,"edi"),"eax"); # rk[13] 1420160814Ssimon &xor ("eax",&DWP(24,"edi")); 1421160814Ssimon &mov (&DWP(56,"edi"),"eax"); # rk[14] 1422160814Ssimon &xor ("eax",&DWP(28,"edi")); 1423160814Ssimon &mov (&DWP(60,"edi"),"eax"); # rk[15] 1424160814Ssimon 1425160814Ssimon &add ("edi",32); 1426160814Ssimon &jmp (&label("14loop")); 1427160814Ssimon 1428160814Ssimon &set_label("14break"); 1429160814Ssimon &mov (&DWP(48,"edi"),14); # setup number of rounds 1430160814Ssimon &xor ("eax","eax"); 1431160814Ssimon &jmp (&label("exit")); 1432160814Ssimon 1433160814Ssimon &set_label("badpointer"); 1434160814Ssimon &mov ("eax",-1); 1435160814Ssimon &set_label("exit"); 1436160814Ssimon&function_end("AES_set_encrypt_key"); 1437160814Ssimon 1438160814Ssimonsub deckey() 1439160814Ssimon{ my ($i,$ptr,$te,$td) = @_; 1440160814Ssimon 1441160814Ssimon &mov ("eax",&DWP($i,$ptr)); 1442160814Ssimon &mov ("edx","eax"); 1443160814Ssimon &movz ("ebx",&HB("eax")); 1444160814Ssimon &shr ("edx",16); 1445160814Ssimon &and ("eax",0xFF); 1446160814Ssimon &movz ("eax",&BP(2,$te,"eax",8)); 1447160814Ssimon &movz ("ebx",&BP(2,$te,"ebx",8)); 1448160814Ssimon &mov ("eax",&DWP(0,$td,"eax",8)); 1449160814Ssimon &xor ("eax",&DWP(3,$td,"ebx",8)); 1450160814Ssimon &movz ("ebx",&HB("edx")); 1451160814Ssimon &and ("edx",0xFF); 1452160814Ssimon &movz ("edx",&BP(2,$te,"edx",8)); 1453160814Ssimon &movz ("ebx",&BP(2,$te,"ebx",8)); 1454160814Ssimon &xor ("eax",&DWP(2,$td,"edx",8)); 1455160814Ssimon &xor ("eax",&DWP(1,$td,"ebx",8)); 1456160814Ssimon &mov (&DWP($i,$ptr),"eax"); 1457160814Ssimon} 1458160814Ssimon 1459160814Ssimon# int AES_set_decrypt_key(const unsigned char *userKey, const int bits, 1460160814Ssimon# AES_KEY *key) 1461160814Ssimon&public_label("AES_Td"); 1462160814Ssimon&public_label("AES_Te"); 1463160814Ssimon&function_begin_B("AES_set_decrypt_key"); 1464160814Ssimon &mov ("eax",&wparam(0)); 1465160814Ssimon &mov ("ecx",&wparam(1)); 1466160814Ssimon &mov ("edx",&wparam(2)); 1467160814Ssimon &sub ("esp",12); 1468160814Ssimon &mov (&DWP(0,"esp"),"eax"); 1469160814Ssimon &mov (&DWP(4,"esp"),"ecx"); 1470160814Ssimon &mov (&DWP(8,"esp"),"edx"); 1471160814Ssimon &call ("AES_set_encrypt_key"); 1472160814Ssimon &add ("esp",12); 1473160814Ssimon &cmp ("eax",0); 1474160814Ssimon &je (&label("proceed")); 1475160814Ssimon &ret (); 1476160814Ssimon 1477160814Ssimon &set_label("proceed"); 1478160814Ssimon &push ("ebp"); 1479160814Ssimon &push ("ebx"); 1480160814Ssimon &push ("esi"); 1481160814Ssimon &push ("edi"); 1482160814Ssimon 1483160814Ssimon &mov ("esi",&wparam(2)); 1484160814Ssimon &mov ("ecx",&DWP(240,"esi")); # pull number of rounds 1485160814Ssimon &lea ("ecx",&DWP(0,"","ecx",4)); 1486160814Ssimon &lea ("edi",&DWP(0,"esi","ecx",4)); # pointer to last chunk 1487160814Ssimon 1488160814Ssimon &align (4); 1489160814Ssimon &set_label("invert"); # invert order of chunks 1490160814Ssimon &mov ("eax",&DWP(0,"esi")); 1491160814Ssimon &mov ("ebx",&DWP(4,"esi")); 1492160814Ssimon &mov ("ecx",&DWP(0,"edi")); 1493160814Ssimon &mov ("edx",&DWP(4,"edi")); 1494160814Ssimon &mov (&DWP(0,"edi"),"eax"); 1495160814Ssimon &mov (&DWP(4,"edi"),"ebx"); 1496160814Ssimon &mov (&DWP(0,"esi"),"ecx"); 1497160814Ssimon &mov (&DWP(4,"esi"),"edx"); 1498160814Ssimon &mov ("eax",&DWP(8,"esi")); 1499160814Ssimon &mov ("ebx",&DWP(12,"esi")); 1500160814Ssimon &mov ("ecx",&DWP(8,"edi")); 1501160814Ssimon &mov ("edx",&DWP(12,"edi")); 1502160814Ssimon &mov (&DWP(8,"edi"),"eax"); 1503160814Ssimon &mov (&DWP(12,"edi"),"ebx"); 1504160814Ssimon &mov (&DWP(8,"esi"),"ecx"); 1505160814Ssimon &mov (&DWP(12,"esi"),"edx"); 1506160814Ssimon &add ("esi",16); 1507160814Ssimon &sub ("edi",16); 1508160814Ssimon &cmp ("esi","edi"); 1509160814Ssimon &jne (&label("invert")); 1510160814Ssimon 1511160814Ssimon &call (&label("pic_point")); 1512160814Ssimon &set_label("pic_point"); 1513160814Ssimon blindpop("ebp"); 1514160814Ssimon &lea ("edi",&DWP(&label("AES_Td")."-".&label("pic_point"),"ebp")); 1515160814Ssimon &lea ("ebp",&DWP(&label("AES_Te")."-".&label("pic_point"),"ebp")); 1516160814Ssimon 1517160814Ssimon &mov ("esi",&wparam(2)); 1518160814Ssimon &mov ("ecx",&DWP(240,"esi")); # pull number of rounds 1519160814Ssimon &dec ("ecx"); 1520160814Ssimon &align (4); 1521160814Ssimon &set_label("permute"); # permute the key schedule 1522160814Ssimon &add ("esi",16); 1523160814Ssimon &deckey (0,"esi","ebp","edi"); 1524160814Ssimon &deckey (4,"esi","ebp","edi"); 1525160814Ssimon &deckey (8,"esi","ebp","edi"); 1526160814Ssimon &deckey (12,"esi","ebp","edi"); 1527160814Ssimon &dec ("ecx"); 1528160814Ssimon &jnz (&label("permute")); 1529160814Ssimon 1530160814Ssimon &xor ("eax","eax"); # return success 1531160814Ssimon&function_end("AES_set_decrypt_key"); 1532160814Ssimon 1533160814Ssimon&asm_finish(); 1534