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| author | marha <marha@users.sourceforge.net> | 2009-06-28 22:07:26 +0000 |
|---|---|---|
| committer | marha <marha@users.sourceforge.net> | 2009-06-28 22:07:26 +0000 |
| commit | 3562e78743202e43aec8727005182a2558117eca (patch) | |
| tree | 8f9113a77d12470c5c851a2a8e4cb02e89df7d43 /openssl/crypto/aes/asm/aes-586.pl | |
| download | vcxsrv-3562e78743202e43aec8727005182a2558117eca.tar.gz vcxsrv-3562e78743202e43aec8727005182a2558117eca.tar.bz2 vcxsrv-3562e78743202e43aec8727005182a2558117eca.zip | |
Checked in the following released items:
xkeyboard-config-1.4.tar.gz
ttf-bitstream-vera-1.10.tar.gz
font-alias-1.0.1.tar.gz
font-sun-misc-1.0.0.tar.gz
font-sun-misc-1.0.0.tar.gz
font-sony-misc-1.0.0.tar.gz
font-schumacher-misc-1.0.0.tar.gz
font-mutt-misc-1.0.0.tar.gz
font-misc-misc-1.0.0.tar.gz
font-misc-meltho-1.0.0.tar.gz
font-micro-misc-1.0.0.tar.gz
font-jis-misc-1.0.0.tar.gz
font-isas-misc-1.0.0.tar.gz
font-dec-misc-1.0.0.tar.gz
font-daewoo-misc-1.0.0.tar.gz
font-cursor-misc-1.0.0.tar.gz
font-arabic-misc-1.0.0.tar.gz
font-winitzki-cyrillic-1.0.0.tar.gz
font-misc-cyrillic-1.0.0.tar.gz
font-cronyx-cyrillic-1.0.0.tar.gz
font-screen-cyrillic-1.0.1.tar.gz
font-xfree86-type1-1.0.1.tar.gz
font-adobe-utopia-type1-1.0.1.tar.gz
font-ibm-type1-1.0.0.tar.gz
font-bitstream-type1-1.0.0.tar.gz
font-bitstream-speedo-1.0.0.tar.gz
font-bh-ttf-1.0.0.tar.gz
font-bh-type1-1.0.0.tar.gz
font-bitstream-100dpi-1.0.0.tar.gz
font-bh-lucidatypewriter-100dpi-1.0.0.tar.gz
font-bh-100dpi-1.0.0.tar.gz
font-adobe-utopia-100dpi-1.0.1.tar.gz
font-adobe-100dpi-1.0.0.tar.gz
font-util-1.0.1.tar.gz
font-bitstream-75dpi-1.0.0.tar.gz
font-bh-lucidatypewriter-75dpi-1.0.0.tar.gz
font-adobe-utopia-75dpi-1.0.1.tar.gz
font-bh-75dpi-1.0.0.tar.gz
bdftopcf-1.0.1.tar.gz
font-adobe-75dpi-1.0.0.tar.gz
mkfontscale-1.0.6.tar.gz
openssl-0.9.8k.tar.gz
bigreqsproto-1.0.2.tar.gz
xtrans-1.2.2.tar.gz
resourceproto-1.0.2.tar.gz
inputproto-1.4.4.tar.gz
compositeproto-0.4.tar.gz
damageproto-1.1.0.tar.gz
zlib-1.2.3.tar.gz
xkbcomp-1.0.5.tar.gz
freetype-2.3.9.tar.gz
pthreads-w32-2-8-0-release.tar.gz
pixman-0.12.0.tar.gz
kbproto-1.0.3.tar.gz
evieext-1.0.2.tar.gz
fixesproto-4.0.tar.gz
recordproto-1.13.2.tar.gz
randrproto-1.2.2.tar.gz
scrnsaverproto-1.1.0.tar.gz
renderproto-0.9.3.tar.gz
xcmiscproto-1.1.2.tar.gz
fontsproto-2.0.2.tar.gz
xextproto-7.0.3.tar.gz
xproto-7.0.14.tar.gz
libXdmcp-1.0.2.tar.gz
libxkbfile-1.0.5.tar.gz
libfontenc-1.0.4.tar.gz
libXfont-1.3.4.tar.gz
libX11-1.1.5.tar.gz
libXau-1.0.4.tar.gz
libxcb-1.1.tar.gz
xorg-server-1.5.3.tar.gz
Diffstat (limited to 'openssl/crypto/aes/asm/aes-586.pl')
| -rw-r--r-- | openssl/crypto/aes/asm/aes-586.pl | 1533 |
1 files changed, 1533 insertions, 0 deletions
diff --git a/openssl/crypto/aes/asm/aes-586.pl b/openssl/crypto/aes/asm/aes-586.pl new file mode 100644 index 000000000..3bc46a968 --- /dev/null +++ b/openssl/crypto/aes/asm/aes-586.pl @@ -0,0 +1,1533 @@ +#!/usr/bin/env perl +# +# ==================================================================== +# Written by Andy Polyakov <appro@fy.chalmers.se> for the OpenSSL +# project. Rights for redistribution and usage in source and binary +# forms are granted according to the OpenSSL license. +# ==================================================================== +# +# Version 3.6. +# +# You might fail to appreciate this module performance from the first +# try. If compared to "vanilla" linux-ia32-icc target, i.e. considered +# to be *the* best Intel C compiler without -KPIC, performance appears +# to be virtually identical... But try to re-configure with shared +# library support... Aha! Intel compiler "suddenly" lags behind by 30% +# [on P4, more on others]:-) And if compared to position-independent +# code generated by GNU C, this code performs *more* than *twice* as +# fast! Yes, all this buzz about PIC means that unlike other hand- +# coded implementations, this one was explicitly designed to be safe +# to use even in shared library context... This also means that this +# code isn't necessarily absolutely fastest "ever," because in order +# to achieve position independence an extra register has to be +# off-loaded to stack, which affects the benchmark result. +# +# Special note about instruction choice. Do you recall RC4_INT code +# performing poorly on P4? It might be the time to figure out why. +# RC4_INT code implies effective address calculations in base+offset*4 +# form. Trouble is that it seems that offset scaling turned to be +# critical path... At least eliminating scaling resulted in 2.8x RC4 +# performance improvement [as you might recall]. As AES code is hungry +# for scaling too, I [try to] avoid the latter by favoring off-by-2 +# shifts and masking the result with 0xFF<<2 instead of "boring" 0xFF. +# +# As was shown by Dean Gaudet <dean@arctic.org>, the above note turned +# void. Performance improvement with off-by-2 shifts was observed on +# intermediate implementation, which was spilling yet another register +# to stack... Final offset*4 code below runs just a tad faster on P4, +# but exhibits up to 10% improvement on other cores. +# +# Second version is "monolithic" replacement for aes_core.c, which in +# addition to AES_[de|en]crypt implements AES_set_[de|en]cryption_key. +# This made it possible to implement little-endian variant of the +# algorithm without modifying the base C code. Motivating factor for +# the undertaken effort was that it appeared that in tight IA-32 +# register window little-endian flavor could achieve slightly higher +# Instruction Level Parallelism, and it indeed resulted in up to 15% +# better performance on most recent µ-archs... +# +# Third version adds AES_cbc_encrypt implementation, which resulted in +# up to 40% performance imrovement of CBC benchmark results. 40% was +# observed on P4 core, where "overall" imrovement coefficient, i.e. if +# compared to PIC generated by GCC and in CBC mode, was observed to be +# as large as 4x:-) CBC performance is virtually identical to ECB now +# and on some platforms even better, e.g. 17.6 "small" cycles/byte on +# Opteron, because certain function prologues and epilogues are +# effectively taken out of the loop... +# +# Version 3.2 implements compressed tables and prefetch of these tables +# in CBC[!] mode. Former means that 3/4 of table references are now +# misaligned, which unfortunately has negative impact on elder IA-32 +# implementations, Pentium suffered 30% penalty, PIII - 10%. +# +# Version 3.3 avoids L1 cache aliasing between stack frame and +# S-boxes, and 3.4 - L1 cache aliasing even between key schedule. The +# latter is achieved by copying the key schedule to controlled place in +# stack. This unfortunately has rather strong impact on small block CBC +# performance, ~2x deterioration on 16-byte block if compared to 3.3. +# +# Version 3.5 checks if there is L1 cache aliasing between user-supplied +# key schedule and S-boxes and abstains from copying the former if +# there is no. This allows end-user to consciously retain small block +# performance by aligning key schedule in specific manner. +# +# Version 3.6 compresses Td4 to 256 bytes and prefetches it in ECB. +# +# Current ECB performance numbers for 128-bit key in CPU cycles per +# processed byte [measure commonly used by AES benchmarkers] are: +# +# small footprint fully unrolled +# P4 24 22 +# AMD K8 20 19 +# PIII 25 23 +# Pentium 81 78 + +push(@INC,"perlasm","../../perlasm"); +require "x86asm.pl"; + +&asm_init($ARGV[0],"aes-586.pl",$ARGV[$#ARGV] eq "386"); + +$s0="eax"; +$s1="ebx"; +$s2="ecx"; +$s3="edx"; +$key="edi"; +$acc="esi"; + +$compromise=0; # $compromise=128 abstains from copying key + # schedule to stack when encrypting inputs + # shorter than 128 bytes at the cost of + # risksing aliasing with S-boxes. In return + # you get way better, up to +70%, small block + # performance. +$small_footprint=1; # $small_footprint=1 code is ~5% slower [on + # recent µ-archs], but ~5 times smaller! + # I favor compact code to minimize cache + # contention and in hope to "collect" 5% back + # in real-life applications... +$vertical_spin=0; # shift "verticaly" defaults to 0, because of + # its proof-of-concept status... + +# Note that there is no decvert(), as well as last encryption round is +# performed with "horizontal" shifts. This is because this "vertical" +# implementation [one which groups shifts on a given $s[i] to form a +# "column," unlike "horizontal" one, which groups shifts on different +# $s[i] to form a "row"] is work in progress. It was observed to run +# few percents faster on Intel cores, but not AMD. On AMD K8 core it's +# whole 12% slower:-( So we face a trade-off... Shall it be resolved +# some day? Till then the code is considered experimental and by +# default remains dormant... + +sub encvert() +{ my ($te,@s) = @_; + my $v0 = $acc, $v1 = $key; + + &mov ($v0,$s[3]); # copy s3 + &mov (&DWP(4,"esp"),$s[2]); # save s2 + &mov ($v1,$s[0]); # copy s0 + &mov (&DWP(8,"esp"),$s[1]); # save s1 + + &movz ($s[2],&HB($s[0])); + &and ($s[0],0xFF); + &mov ($s[0],&DWP(0,$te,$s[0],8)); # s0>>0 + &shr ($v1,16); + &mov ($s[3],&DWP(3,$te,$s[2],8)); # s0>>8 + &movz ($s[1],&HB($v1)); + &and ($v1,0xFF); + &mov ($s[2],&DWP(2,$te,$v1,8)); # s0>>16 + &mov ($v1,$v0); + &mov ($s[1],&DWP(1,$te,$s[1],8)); # s0>>24 + + &and ($v0,0xFF); + &xor ($s[3],&DWP(0,$te,$v0,8)); # s3>>0 + &movz ($v0,&HB($v1)); + &shr ($v1,16); + &xor ($s[2],&DWP(3,$te,$v0,8)); # s3>>8 + &movz ($v0,&HB($v1)); + &and ($v1,0xFF); + &xor ($s[1],&DWP(2,$te,$v1,8)); # s3>>16 + &mov ($v1,&DWP(4,"esp")); # restore s2 + &xor ($s[0],&DWP(1,$te,$v0,8)); # s3>>24 + + &mov ($v0,$v1); + &and ($v1,0xFF); + &xor ($s[2],&DWP(0,$te,$v1,8)); # s2>>0 + &movz ($v1,&HB($v0)); + &shr ($v0,16); + &xor ($s[1],&DWP(3,$te,$v1,8)); # s2>>8 + &movz ($v1,&HB($v0)); + &and ($v0,0xFF); + &xor ($s[0],&DWP(2,$te,$v0,8)); # s2>>16 + &mov ($v0,&DWP(8,"esp")); # restore s1 + &xor ($s[3],&DWP(1,$te,$v1,8)); # s2>>24 + + &mov ($v1,$v0); + &and ($v0,0xFF); + &xor ($s[1],&DWP(0,$te,$v0,8)); # s1>>0 + &movz ($v0,&HB($v1)); + &shr ($v1,16); + &xor ($s[0],&DWP(3,$te,$v0,8)); # s1>>8 + &movz ($v0,&HB($v1)); + &and ($v1,0xFF); + &xor ($s[3],&DWP(2,$te,$v1,8)); # s1>>16 + &mov ($key,&DWP(12,"esp")); # reincarnate v1 as key + &xor ($s[2],&DWP(1,$te,$v0,8)); # s1>>24 +} + +sub encstep() +{ my ($i,$te,@s) = @_; + my $tmp = $key; + my $out = $i==3?$s[0]:$acc; + + # lines marked with #%e?x[i] denote "reordered" instructions... + if ($i==3) { &mov ($key,&DWP(12,"esp")); }##%edx + else { &mov ($out,$s[0]); + &and ($out,0xFF); } + if ($i==1) { &shr ($s[0],16); }#%ebx[1] + if ($i==2) { &shr ($s[0],24); }#%ecx[2] + &mov ($out,&DWP(0,$te,$out,8)); + + if ($i==3) { $tmp=$s[1]; }##%eax + &movz ($tmp,&HB($s[1])); + &xor ($out,&DWP(3,$te,$tmp,8)); + + if ($i==3) { $tmp=$s[2]; &mov ($s[1],&DWP(4,"esp")); }##%ebx + else { &mov ($tmp,$s[2]); + &shr ($tmp,16); } + if ($i==2) { &and ($s[1],0xFF); }#%edx[2] + &and ($tmp,0xFF); + &xor ($out,&DWP(2,$te,$tmp,8)); + + if ($i==3) { $tmp=$s[3]; &mov ($s[2],&DWP(8,"esp")); }##%ecx + elsif($i==2){ &movz ($tmp,&HB($s[3])); }#%ebx[2] + else { &mov ($tmp,$s[3]); + &shr ($tmp,24) } + &xor ($out,&DWP(1,$te,$tmp,8)); + if ($i<2) { &mov (&DWP(4+4*$i,"esp"),$out); } + if ($i==3) { &mov ($s[3],$acc); } + &comment(); +} + +sub enclast() +{ my ($i,$te,@s)=@_; + my $tmp = $key; + my $out = $i==3?$s[0]:$acc; + + if ($i==3) { &mov ($key,&DWP(12,"esp")); }##%edx + else { &mov ($out,$s[0]); } + &and ($out,0xFF); + if ($i==1) { &shr ($s[0],16); }#%ebx[1] + if ($i==2) { &shr ($s[0],24); }#%ecx[2] + &mov ($out,&DWP(2,$te,$out,8)); + &and ($out,0x000000ff); + + if ($i==3) { $tmp=$s[1]; }##%eax + &movz ($tmp,&HB($s[1])); + &mov ($tmp,&DWP(0,$te,$tmp,8)); + &and ($tmp,0x0000ff00); + &xor ($out,$tmp); + + if ($i==3) { $tmp=$s[2]; &mov ($s[1],&DWP(4,"esp")); }##%ebx + else { mov ($tmp,$s[2]); + &shr ($tmp,16); } + if ($i==2) { &and ($s[1],0xFF); }#%edx[2] + &and ($tmp,0xFF); + &mov ($tmp,&DWP(0,$te,$tmp,8)); + &and ($tmp,0x00ff0000); + &xor ($out,$tmp); + + if ($i==3) { $tmp=$s[3]; &mov ($s[2],&DWP(8,"esp")); }##%ecx + elsif($i==2){ &movz ($tmp,&HB($s[3])); }#%ebx[2] + else { &mov ($tmp,$s[3]); + &shr ($tmp,24); } + &mov ($tmp,&DWP(2,$te,$tmp,8)); + &and ($tmp,0xff000000); + &xor ($out,$tmp); + if ($i<2) { &mov (&DWP(4+4*$i,"esp"),$out); } + if ($i==3) { &mov ($s[3],$acc); } +} + +sub _data_word() { my $i; while(defined($i=shift)) { &data_word($i,$i); } } + +&public_label("AES_Te"); +&function_begin_B("_x86_AES_encrypt"); + if ($vertical_spin) { + # I need high parts of volatile registers to be accessible... + &exch ($s1="edi",$key="ebx"); + &mov ($s2="esi",$acc="ecx"); + } + + # note that caller is expected to allocate stack frame for me! + &mov (&DWP(12,"esp"),$key); # save key + + &xor ($s0,&DWP(0,$key)); # xor with key + &xor ($s1,&DWP(4,$key)); + &xor ($s2,&DWP(8,$key)); + &xor ($s3,&DWP(12,$key)); + + &mov ($acc,&DWP(240,$key)); # load key->rounds + + if ($small_footprint) { + &lea ($acc,&DWP(-2,$acc,$acc)); + &lea ($acc,&DWP(0,$key,$acc,8)); + &mov (&DWP(16,"esp"),$acc); # end of key schedule + &align (4); + &set_label("loop"); + if ($vertical_spin) { + &encvert("ebp",$s0,$s1,$s2,$s3); + } else { + &encstep(0,"ebp",$s0,$s1,$s2,$s3); + &encstep(1,"ebp",$s1,$s2,$s3,$s0); + &encstep(2,"ebp",$s2,$s3,$s0,$s1); + &encstep(3,"ebp",$s3,$s0,$s1,$s2); + } + &add ($key,16); # advance rd_key + &xor ($s0,&DWP(0,$key)); + &xor ($s1,&DWP(4,$key)); + &xor ($s2,&DWP(8,$key)); + &xor ($s3,&DWP(12,$key)); + &cmp ($key,&DWP(16,"esp")); + &mov (&DWP(12,"esp"),$key); + &jb (&label("loop")); + } + else { + &cmp ($acc,10); + &jle (&label("10rounds")); + &cmp ($acc,12); + &jle (&label("12rounds")); + + &set_label("14rounds"); + for ($i=1;$i<3;$i++) { + if ($vertical_spin) { + &encvert("ebp",$s0,$s1,$s2,$s3); + } else { + &encstep(0,"ebp",$s0,$s1,$s2,$s3); + &encstep(1,"ebp",$s1,$s2,$s3,$s0); + &encstep(2,"ebp",$s2,$s3,$s0,$s1); + &encstep(3,"ebp",$s3,$s0,$s1,$s2); + } + &xor ($s0,&DWP(16*$i+0,$key)); + &xor ($s1,&DWP(16*$i+4,$key)); + &xor ($s2,&DWP(16*$i+8,$key)); + &xor ($s3,&DWP(16*$i+12,$key)); + } + &add ($key,32); + &mov (&DWP(12,"esp"),$key); # advance rd_key + &set_label("12rounds"); + for ($i=1;$i<3;$i++) { + if ($vertical_spin) { + &encvert("ebp",$s0,$s1,$s2,$s3); + } else { + &encstep(0,"ebp",$s0,$s1,$s2,$s3); + &encstep(1,"ebp",$s1,$s2,$s3,$s0); + &encstep(2,"ebp",$s2,$s3,$s0,$s1); + &encstep(3,"ebp",$s3,$s0,$s1,$s2); + } + &xor ($s0,&DWP(16*$i+0,$key)); + &xor ($s1,&DWP(16*$i+4,$key)); + &xor ($s2,&DWP(16*$i+8,$key)); + &xor ($s3,&DWP(16*$i+12,$key)); + } + &add ($key,32); + &mov (&DWP(12,"esp"),$key); # advance rd_key + &set_label("10rounds"); + for ($i=1;$i<10;$i++) { + if ($vertical_spin) { + &encvert("ebp",$s0,$s1,$s2,$s3); + } else { + &encstep(0,"ebp",$s0,$s1,$s2,$s3); + &encstep(1,"ebp",$s1,$s2,$s3,$s0); + &encstep(2,"ebp",$s2,$s3,$s0,$s1); + &encstep(3,"ebp",$s3,$s0,$s1,$s2); + } + &xor ($s0,&DWP(16*$i+0,$key)); + &xor ($s1,&DWP(16*$i+4,$key)); + &xor ($s2,&DWP(16*$i+8,$key)); + &xor ($s3,&DWP(16*$i+12,$key)); + } + } + + if ($vertical_spin) { + # "reincarnate" some registers for "horizontal" spin... + &mov ($s1="ebx",$key="edi"); + &mov ($s2="ecx",$acc="esi"); + } + &enclast(0,"ebp",$s0,$s1,$s2,$s3); + &enclast(1,"ebp",$s1,$s2,$s3,$s0); + &enclast(2,"ebp",$s2,$s3,$s0,$s1); + &enclast(3,"ebp",$s3,$s0,$s1,$s2); + + &add ($key,$small_footprint?16:160); + &xor ($s0,&DWP(0,$key)); + &xor ($s1,&DWP(4,$key)); + &xor ($s2,&DWP(8,$key)); + &xor ($s3,&DWP(12,$key)); + + &ret (); + +&set_label("AES_Te",64); # Yes! I keep it in the code segment! + &_data_word(0xa56363c6, 0x847c7cf8, 0x997777ee, 0x8d7b7bf6); + &_data_word(0x0df2f2ff, 0xbd6b6bd6, 0xb16f6fde, 0x54c5c591); + &_data_word(0x50303060, 0x03010102, 0xa96767ce, 0x7d2b2b56); + &_data_word(0x19fefee7, 0x62d7d7b5, 0xe6abab4d, 0x9a7676ec); + &_data_word(0x45caca8f, 0x9d82821f, 0x40c9c989, 0x877d7dfa); + &_data_word(0x15fafaef, 0xeb5959b2, 0xc947478e, 0x0bf0f0fb); + &_data_word(0xecadad41, 0x67d4d4b3, 0xfda2a25f, 0xeaafaf45); + &_data_word(0xbf9c9c23, 0xf7a4a453, 0x967272e4, 0x5bc0c09b); + &_data_word(0xc2b7b775, 0x1cfdfde1, 0xae93933d, 0x6a26264c); + &_data_word(0x5a36366c, 0x413f3f7e, 0x02f7f7f5, 0x4fcccc83); + &_data_word(0x5c343468, 0xf4a5a551, 0x34e5e5d1, 0x08f1f1f9); + &_data_word(0x937171e2, 0x73d8d8ab, 0x53313162, 0x3f15152a); + &_data_word(0x0c040408, 0x52c7c795, 0x65232346, 0x5ec3c39d); + &_data_word(0x28181830, 0xa1969637, 0x0f05050a, 0xb59a9a2f); + &_data_word(0x0907070e, 0x36121224, 0x9b80801b, 0x3de2e2df); + &_data_word(0x26ebebcd, 0x6927274e, 0xcdb2b27f, 0x9f7575ea); + &_data_word(0x1b090912, 0x9e83831d, 0x742c2c58, 0x2e1a1a34); + &_data_word(0x2d1b1b36, 0xb26e6edc, 0xee5a5ab4, 0xfba0a05b); + &_data_word(0xf65252a4, 0x4d3b3b76, 0x61d6d6b7, 0xceb3b37d); + &_data_word(0x7b292952, 0x3ee3e3dd, 0x712f2f5e, 0x97848413); + &_data_word(0xf55353a6, 0x68d1d1b9, 0x00000000, 0x2cededc1); + &_data_word(0x60202040, 0x1ffcfce3, 0xc8b1b179, 0xed5b5bb6); + &_data_word(0xbe6a6ad4, 0x46cbcb8d, 0xd9bebe67, 0x4b393972); + &_data_word(0xde4a4a94, 0xd44c4c98, 0xe85858b0, 0x4acfcf85); + &_data_word(0x6bd0d0bb, 0x2aefefc5, 0xe5aaaa4f, 0x16fbfbed); + &_data_word(0xc5434386, 0xd74d4d9a, 0x55333366, 0x94858511); + &_data_word(0xcf45458a, 0x10f9f9e9, 0x06020204, 0x817f7ffe); + &_data_word(0xf05050a0, 0x443c3c78, 0xba9f9f25, 0xe3a8a84b); + &_data_word(0xf35151a2, 0xfea3a35d, 0xc0404080, 0x8a8f8f05); + &_data_word(0xad92923f, 0xbc9d9d21, 0x48383870, 0x04f5f5f1); + &_data_word(0xdfbcbc63, 0xc1b6b677, 0x75dadaaf, 0x63212142); + &_data_word(0x30101020, 0x1affffe5, 0x0ef3f3fd, 0x6dd2d2bf); + &_data_word(0x4ccdcd81, 0x140c0c18, 0x35131326, 0x2fececc3); + &_data_word(0xe15f5fbe, 0xa2979735, 0xcc444488, 0x3917172e); + &_data_word(0x57c4c493, 0xf2a7a755, 0x827e7efc, 0x473d3d7a); + &_data_word(0xac6464c8, 0xe75d5dba, 0x2b191932, 0x957373e6); + &_data_word(0xa06060c0, 0x98818119, 0xd14f4f9e, 0x7fdcdca3); + &_data_word(0x66222244, 0x7e2a2a54, 0xab90903b, 0x8388880b); + &_data_word(0xca46468c, 0x29eeeec7, 0xd3b8b86b, 0x3c141428); + &_data_word(0x79dedea7, 0xe25e5ebc, 0x1d0b0b16, 0x76dbdbad); + &_data_word(0x3be0e0db, 0x56323264, 0x4e3a3a74, 0x1e0a0a14); + &_data_word(0xdb494992, 0x0a06060c, 0x6c242448, 0xe45c5cb8); + &_data_word(0x5dc2c29f, 0x6ed3d3bd, 0xefacac43, 0xa66262c4); + &_data_word(0xa8919139, 0xa4959531, 0x37e4e4d3, 0x8b7979f2); + &_data_word(0x32e7e7d5, 0x43c8c88b, 0x5937376e, 0xb76d6dda); + &_data_word(0x8c8d8d01, 0x64d5d5b1, 0xd24e4e9c, 0xe0a9a949); + &_data_word(0xb46c6cd8, 0xfa5656ac, 0x07f4f4f3, 0x25eaeacf); + &_data_word(0xaf6565ca, 0x8e7a7af4, 0xe9aeae47, 0x18080810); + &_data_word(0xd5baba6f, 0x887878f0, 0x6f25254a, 0x722e2e5c); + &_data_word(0x241c1c38, 0xf1a6a657, 0xc7b4b473, 0x51c6c697); + &_data_word(0x23e8e8cb, 0x7cdddda1, 0x9c7474e8, 0x211f1f3e); + &_data_word(0xdd4b4b96, 0xdcbdbd61, 0x868b8b0d, 0x858a8a0f); + &_data_word(0x907070e0, 0x423e3e7c, 0xc4b5b571, 0xaa6666cc); + &_data_word(0xd8484890, 0x05030306, 0x01f6f6f7, 0x120e0e1c); + &_data_word(0xa36161c2, 0x5f35356a, 0xf95757ae, 0xd0b9b969); + &_data_word(0x91868617, 0x58c1c199, 0x271d1d3a, 0xb99e9e27); + &_data_word(0x38e1e1d9, 0x13f8f8eb, 0xb398982b, 0x33111122); + &_data_word(0xbb6969d2, 0x70d9d9a9, 0x898e8e07, 0xa7949433); + &_data_word(0xb69b9b2d, 0x221e1e3c, 0x92878715, 0x20e9e9c9); + &_data_word(0x49cece87, 0xff5555aa, 0x78282850, 0x7adfdfa5); + &_data_word(0x8f8c8c03, 0xf8a1a159, 0x80898909, 0x170d0d1a); + &_data_word(0xdabfbf65, 0x31e6e6d7, 0xc6424284, 0xb86868d0); + &_data_word(0xc3414182, 0xb0999929, 0x772d2d5a, 0x110f0f1e); + &_data_word(0xcbb0b07b, 0xfc5454a8, 0xd6bbbb6d, 0x3a16162c); +#rcon: + &data_word(0x00000001, 0x00000002, 0x00000004, 0x00000008); + &data_word(0x00000010, 0x00000020, 0x00000040, 0x00000080); + &data_word(0x0000001b, 0x00000036, 0, 0, 0, 0, 0, 0); +&function_end_B("_x86_AES_encrypt"); + +# void AES_encrypt (const void *inp,void *out,const AES_KEY *key); +&public_label("AES_Te"); +&function_begin("AES_encrypt"); + &mov ($acc,&wparam(0)); # load inp + &mov ($key,&wparam(2)); # load key + + &mov ($s0,"esp"); + &sub ("esp",24); + &and ("esp",-64); + &add ("esp",4); + &mov (&DWP(16,"esp"),$s0); + + &call (&label("pic_point")); # make it PIC! + &set_label("pic_point"); + &blindpop("ebp"); + &lea ("ebp",&DWP(&label("AES_Te")."-".&label("pic_point"),"ebp")); + + &mov ($s0,&DWP(0,$acc)); # load input data + &mov ($s1,&DWP(4,$acc)); + &mov ($s2,&DWP(8,$acc)); + &mov ($s3,&DWP(12,$acc)); + + &call ("_x86_AES_encrypt"); + + &mov ("esp",&DWP(16,"esp")); + + &mov ($acc,&wparam(1)); # load out + &mov (&DWP(0,$acc),$s0); # write output data + &mov (&DWP(4,$acc),$s1); + &mov (&DWP(8,$acc),$s2); + &mov (&DWP(12,$acc),$s3); +&function_end("AES_encrypt"); + +#------------------------------------------------------------------# + +sub decstep() +{ my ($i,$td,@s) = @_; + my $tmp = $key; + my $out = $i==3?$s[0]:$acc; + + # no instructions are reordered, as performance appears + # optimal... or rather that all attempts to reorder didn't + # result in better performance [which by the way is not a + # bit lower than ecryption]. + if($i==3) { &mov ($key,&DWP(12,"esp")); } + else { &mov ($out,$s[0]); } + &and ($out,0xFF); + &mov ($out,&DWP(0,$td,$out,8)); + + if ($i==3) { $tmp=$s[1]; } + &movz ($tmp,&HB($s[1])); + &xor ($out,&DWP(3,$td,$tmp,8)); + + if ($i==3) { $tmp=$s[2]; &mov ($s[1],$acc); } + else { &mov ($tmp,$s[2]); } + &shr ($tmp,16); + &and ($tmp,0xFF); + &xor ($out,&DWP(2,$td,$tmp,8)); + + if ($i==3) { $tmp=$s[3]; &mov ($s[2],&DWP(8,"esp")); } + else { &mov ($tmp,$s[3]); } + &shr ($tmp,24); + &xor ($out,&DWP(1,$td,$tmp,8)); + if ($i<2) { &mov (&DWP(4+4*$i,"esp"),$out); } + if ($i==3) { &mov ($s[3],&DWP(4,"esp")); } + &comment(); +} + +sub declast() +{ my ($i,$td,@s)=@_; + my $tmp = $key; + my $out = $i==3?$s[0]:$acc; + + if($i==3) { &mov ($key,&DWP(12,"esp")); } + else { &mov ($out,$s[0]); } + &and ($out,0xFF); + &movz ($out,&BP(2048,$td,$out,1)); + + if ($i==3) { $tmp=$s[1]; } + &movz ($tmp,&HB($s[1])); + &movz ($tmp,&BP(2048,$td,$tmp,1)); + &shl ($tmp,8); + &xor ($out,$tmp); + + if ($i==3) { $tmp=$s[2]; &mov ($s[1],$acc); } + else { mov ($tmp,$s[2]); } + &shr ($tmp,16); + &and ($tmp,0xFF); + &movz ($tmp,&BP(2048,$td,$tmp,1)); + &shl ($tmp,16); + &xor ($out,$tmp); + + if ($i==3) { $tmp=$s[3]; &mov ($s[2],&DWP(8,"esp")); } + else { &mov ($tmp,$s[3]); } + &shr ($tmp,24); + &movz ($tmp,&BP(2048,$td,$tmp,1)); + &shl ($tmp,24); + &xor ($out,$tmp); + if ($i<2) { &mov (&DWP(4+4*$i,"esp"),$out); } + if ($i==3) { &mov ($s[3],&DWP(4,"esp")); } +} + +&public_label("AES_Td"); +&function_begin_B("_x86_AES_decrypt"); + # note that caller is expected to allocate stack frame for me! + &mov (&DWP(12,"esp"),$key); # save key + + &xor ($s0,&DWP(0,$key)); # xor with key + &xor ($s1,&DWP(4,$key)); + &xor ($s2,&DWP(8,$key)); + &xor ($s3,&DWP(12,$key)); + + &mov ($acc,&DWP(240,$key)); # load key->rounds + + if ($small_footprint) { + &lea ($acc,&DWP(-2,$acc,$acc)); + &lea ($acc,&DWP(0,$key,$acc,8)); + &mov (&DWP(16,"esp"),$acc); # end of key schedule + &align (4); + &set_label("loop"); + &decstep(0,"ebp",$s0,$s3,$s2,$s1); + &decstep(1,"ebp",$s1,$s0,$s3,$s2); + &decstep(2,"ebp",$s2,$s1,$s0,$s3); + &decstep(3,"ebp",$s3,$s2,$s1,$s0); + &add ($key,16); # advance rd_key + &xor ($s0,&DWP(0,$key)); + &xor ($s1,&DWP(4,$key)); + &xor ($s2,&DWP(8,$key)); + &xor ($s3,&DWP(12,$key)); + &cmp ($key,&DWP(16,"esp")); + &mov (&DWP(12,"esp"),$key); + &jb (&label("loop")); + } + else { + &cmp ($acc,10); + &jle (&label("10rounds")); + &cmp ($acc,12); + &jle (&label("12rounds")); + + &set_label("14rounds"); + for ($i=1;$i<3;$i++) { + &decstep(0,"ebp",$s0,$s3,$s2,$s1); + &decstep(1,"ebp",$s1,$s0,$s3,$s2); + &decstep(2,"ebp",$s2,$s1,$s0,$s3); + &decstep(3,"ebp",$s3,$s2,$s1,$s0); + &xor ($s0,&DWP(16*$i+0,$key)); + &xor ($s1,&DWP(16*$i+4,$key)); + &xor ($s2,&DWP(16*$i+8,$key)); + &xor ($s3,&DWP(16*$i+12,$key)); + } + &add ($key,32); + &mov (&DWP(12,"esp"),$key); # advance rd_key + &set_label("12rounds"); + for ($i=1;$i<3;$i++) { + &decstep(0,"ebp",$s0,$s3,$s2,$s1); + &decstep(1,"ebp",$s1,$s0,$s3,$s2); + &decstep(2,"ebp",$s2,$s1,$s0,$s3); + &decstep(3,"ebp",$s3,$s2,$s1,$s0); + &xor ($s0,&DWP(16*$i+0,$key)); + &xor ($s1,&DWP(16*$i+4,$key)); + &xor ($s2,&DWP(16*$i+8,$key)); + &xor ($s3,&DWP(16*$i+12,$key)); + } + &add ($key,32); + &mov (&DWP(12,"esp"),$key); # advance rd_key + &set_label("10rounds"); + for ($i=1;$i<10;$i++) { + &decstep(0,"ebp",$s0,$s3,$s2,$s1); + &decstep(1,"ebp",$s1,$s0,$s3,$s2); + &decstep(2,"ebp",$s2,$s1,$s0,$s3); + &decstep(3,"ebp",$s3,$s2,$s1,$s0); + &xor ($s0,&DWP(16*$i+0,$key)); + &xor ($s1,&DWP(16*$i+4,$key)); + &xor ($s2,&DWP(16*$i+8,$key)); + &xor ($s3,&DWP(16*$i+12,$key)); + } + } + + &declast(0,"ebp",$s0,$s3,$s2,$s1); + &declast(1,"ebp",$s1,$s0,$s3,$s2); + &declast(2,"ebp",$s2,$s1,$s0,$s3); + &declast(3,"ebp",$s3,$s2,$s1,$s0); + + &add ($key,$small_footprint?16:160); + &xor ($s0,&DWP(0,$key)); + &xor ($s1,&DWP(4,$key)); + &xor ($s2,&DWP(8,$key)); + &xor ($s3,&DWP(12,$key)); + + &ret (); + +&set_label("AES_Td",64); # Yes! I keep it in the code segment! + &_data_word(0x50a7f451, 0x5365417e, 0xc3a4171a, 0x965e273a); + &_data_word(0xcb6bab3b, 0xf1459d1f, 0xab58faac, 0x9303e34b); + &_data_word(0x55fa3020, 0xf66d76ad, 0x9176cc88, 0x254c02f5); + &_data_word(0xfcd7e54f, 0xd7cb2ac5, 0x80443526, 0x8fa362b5); + &_data_word(0x495ab1de, 0x671bba25, 0x980eea45, 0xe1c0fe5d); + &_data_word(0x02752fc3, 0x12f04c81, 0xa397468d, 0xc6f9d36b); + &_data_word(0xe75f8f03, 0x959c9215, 0xeb7a6dbf, 0xda595295); + &_data_word(0x2d83bed4, 0xd3217458, 0x2969e049, 0x44c8c98e); + &_data_word(0x6a89c275, 0x78798ef4, 0x6b3e5899, 0xdd71b927); + &_data_word(0xb64fe1be, 0x17ad88f0, 0x66ac20c9, 0xb43ace7d); + &_data_word(0x184adf63, 0x82311ae5, 0x60335197, 0x457f5362); + &_data_word(0xe07764b1, 0x84ae6bbb, 0x1ca081fe, 0x942b08f9); + &_data_word(0x58684870, 0x19fd458f, 0x876cde94, 0xb7f87b52); + &_data_word(0x23d373ab, 0xe2024b72, 0x578f1fe3, 0x2aab5566); + &_data_word(0x0728ebb2, 0x03c2b52f, 0x9a7bc586, 0xa50837d3); + &_data_word(0xf2872830, 0xb2a5bf23, 0xba6a0302, 0x5c8216ed); + &_data_word(0x2b1ccf8a, 0x92b479a7, 0xf0f207f3, 0xa1e2694e); + &_data_word(0xcdf4da65, 0xd5be0506, 0x1f6234d1, 0x8afea6c4); + &_data_word(0x9d532e34, 0xa055f3a2, 0x32e18a05, 0x75ebf6a4); + &_data_word(0x39ec830b, 0xaaef6040, 0x069f715e, 0x51106ebd); + &_data_word(0xf98a213e, 0x3d06dd96, 0xae053edd, 0x46bde64d); + &_data_word(0xb58d5491, 0x055dc471, 0x6fd40604, 0xff155060); + &_data_word(0x24fb9819, 0x97e9bdd6, 0xcc434089, 0x779ed967); + &_data_word(0xbd42e8b0, 0x888b8907, 0x385b19e7, 0xdbeec879); + &_data_word(0x470a7ca1, 0xe90f427c, 0xc91e84f8, 0x00000000); + &_data_word(0x83868009, 0x48ed2b32, 0xac70111e, 0x4e725a6c); + &_data_word(0xfbff0efd, 0x5638850f, 0x1ed5ae3d, 0x27392d36); + &_data_word(0x64d90f0a, 0x21a65c68, 0xd1545b9b, 0x3a2e3624); + &_data_word(0xb1670a0c, 0x0fe75793, 0xd296eeb4, 0x9e919b1b); + &_data_word(0x4fc5c080, 0xa220dc61, 0x694b775a, 0x161a121c); + &_data_word(0x0aba93e2, 0xe52aa0c0, 0x43e0223c, 0x1d171b12); + &_data_word(0x0b0d090e, 0xadc78bf2, 0xb9a8b62d, 0xc8a91e14); + &_data_word(0x8519f157, 0x4c0775af, 0xbbdd99ee, 0xfd607fa3); + &_data_word(0x9f2601f7, 0xbcf5725c, 0xc53b6644, 0x347efb5b); + &_data_word(0x7629438b, 0xdcc623cb, 0x68fcedb6, 0x63f1e4b8); + &_data_word(0xcadc31d7, 0x10856342, 0x40229713, 0x2011c684); + &_data_word(0x7d244a85, 0xf83dbbd2, 0x1132f9ae, 0x6da129c7); + &_data_word(0x4b2f9e1d, 0xf330b2dc, 0xec52860d, 0xd0e3c177); + &_data_word(0x6c16b32b, 0x99b970a9, 0xfa489411, 0x2264e947); + &_data_word(0xc48cfca8, 0x1a3ff0a0, 0xd82c7d56, 0xef903322); + &_data_word(0xc74e4987, 0xc1d138d9, 0xfea2ca8c, 0x360bd498); + &_data_word(0xcf81f5a6, 0x28de7aa5, 0x268eb7da, 0xa4bfad3f); + &_data_word(0xe49d3a2c, 0x0d927850, 0x9bcc5f6a, 0x62467e54); + &_data_word(0xc2138df6, 0xe8b8d890, 0x5ef7392e, 0xf5afc382); + &_data_word(0xbe805d9f, 0x7c93d069, 0xa92dd56f, 0xb31225cf); + &_data_word(0x3b99acc8, 0xa77d1810, 0x6e639ce8, 0x7bbb3bdb); + &_data_word(0x097826cd, 0xf418596e, 0x01b79aec, 0xa89a4f83); + &_data_word(0x656e95e6, 0x7ee6ffaa, 0x08cfbc21, 0xe6e815ef); + &_data_word(0xd99be7ba, 0xce366f4a, 0xd4099fea, 0xd67cb029); + &_data_word(0xafb2a431, 0x31233f2a, 0x3094a5c6, 0xc066a235); + &_data_word(0x37bc4e74, 0xa6ca82fc, 0xb0d090e0, 0x15d8a733); + &_data_word(0x4a9804f1, 0xf7daec41, 0x0e50cd7f, 0x2ff69117); + &_data_word(0x8dd64d76, 0x4db0ef43, 0x544daacc, 0xdf0496e4); + &_data_word(0xe3b5d19e, 0x1b886a4c, 0xb81f2cc1, 0x7f516546); + &_data_word(0x04ea5e9d, 0x5d358c01, 0x737487fa, 0x2e410bfb); + &_data_word(0x5a1d67b3, 0x52d2db92, 0x335610e9, 0x1347d66d); + &_data_word(0x8c61d79a, 0x7a0ca137, 0x8e14f859, 0x893c13eb); + &_data_word(0xee27a9ce, 0x35c961b7, 0xede51ce1, 0x3cb1477a); + &_data_word(0x59dfd29c, 0x3f73f255, 0x79ce1418, 0xbf37c773); + &_data_word(0xeacdf753, 0x5baafd5f, 0x146f3ddf, 0x86db4478); + &_data_word(0x81f3afca, 0x3ec468b9, 0x2c342438, 0x5f40a3c2); + &_data_word(0x72c31d16, 0x0c25e2bc, 0x8b493c28, 0x41950dff); + &_data_word(0x7101a839, 0xdeb30c08, 0x9ce4b4d8, 0x90c15664); + &_data_word(0x6184cb7b, 0x70b632d5, 0x745c6c48, 0x4257b8d0); +#Td4: + &data_byte(0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38); + &data_byte(0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb); + &data_byte(0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87); + &data_byte(0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb); + &data_byte(0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d); + &data_byte(0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e); + &data_byte(0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2); + &data_byte(0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25); + &data_byte(0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16); + &data_byte(0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92); + &data_byte(0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda); + &data_byte(0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84); + &data_byte(0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a); + &data_byte(0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06); + &data_byte(0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02); + &data_byte(0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b); + &data_byte(0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea); + &data_byte(0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73); + &data_byte(0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85); + &data_byte(0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e); + &data_byte(0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89); + &data_byte(0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b); + &data_byte(0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20); + &data_byte(0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4); + &data_byte(0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31); + &data_byte(0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f); + &data_byte(0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d); + &data_byte(0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef); + &data_byte(0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0); + &data_byte(0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61); + &data_byte(0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26); + &data_byte(0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d); +&function_end_B("_x86_AES_decrypt"); + +# void AES_decrypt (const void *inp,void *out,const AES_KEY *key); +&public_label("AES_Td"); +&function_begin("AES_decrypt"); + &mov ($acc,&wparam(0)); # load inp + &mov ($key,&wparam(2)); # load key + + &mov ($s0,"esp"); + &sub ("esp",24); + &and ("esp",-64); + &add ("esp",4); + &mov (&DWP(16,"esp"),$s0); + + &call (&label("pic_point")); # make it PIC! + &set_label("pic_point"); + &blindpop("ebp"); + &lea ("ebp",&DWP(&label("AES_Td")."-".&label("pic_point"),"ebp")); + + # prefetch Td4 + &lea ("ebp",&DWP(2048+128,"ebp")); + &mov ($s0,&DWP(0-128,"ebp")); + &mov ($s1,&DWP(32-128,"ebp")); + &mov ($s2,&DWP(64-128,"ebp")); + &mov ($s3,&DWP(96-128,"ebp")); + &mov ($s0,&DWP(128-128,"ebp")); + &mov ($s1,&DWP(160-128,"ebp")); + &mov ($s2,&DWP(192-128,"ebp")); + &mov ($s3,&DWP(224-128,"ebp")); + &lea ("ebp",&DWP(-2048-128,"ebp")); + + &mov ($s0,&DWP(0,$acc)); # load input data + &mov ($s1,&DWP(4,$acc)); + &mov ($s2,&DWP(8,$acc)); + &mov ($s3,&DWP(12,$acc)); + + &call ("_x86_AES_decrypt"); + + &mov ("esp",&DWP(16,"esp")); + + &mov ($acc,&wparam(1)); # load out + &mov (&DWP(0,$acc),$s0); # write output data + &mov (&DWP(4,$acc),$s1); + &mov (&DWP(8,$acc),$s2); + &mov (&DWP(12,$acc),$s3); +&function_end("AES_decrypt"); + +# void AES_cbc_encrypt (const void char *inp, unsigned char *out, +# size_t length, const AES_KEY *key, +# unsigned char *ivp,const int enc); +{ +# stack frame layout +# -4(%esp) 0(%esp) return address +# 0(%esp) 4(%esp) tmp1 +# 4(%esp) 8(%esp) tmp2 +# 8(%esp) 12(%esp) key +# 12(%esp) 16(%esp) end of key schedule +my $_esp=&DWP(16,"esp"); #saved %esp +my $_inp=&DWP(20,"esp"); #copy of wparam(0) +my $_out=&DWP(24,"esp"); #copy of wparam(1) +my $_len=&DWP(28,"esp"); #copy of wparam(2) +my $_key=&DWP(32,"esp"); #copy of wparam(3) +my $_ivp=&DWP(36,"esp"); #copy of wparam(4) +my $_tmp=&DWP(40,"esp"); #volatile variable +my $ivec=&DWP(44,"esp"); #ivec[16] +my $aes_key=&DWP(60,"esp"); #copy of aes_key +my $mark=&DWP(60+240,"esp"); #copy of aes_key->rounds + +&public_label("AES_Te"); +&public_label("AES_Td"); +&function_begin("AES_cbc_encrypt"); + &mov ($s2 eq "ecx"? $s2 : "",&wparam(2)); # load len + &cmp ($s2,0); + &je (&label("enc_out")); + + &call (&label("pic_point")); # make it PIC! + &set_label("pic_point"); + &blindpop("ebp"); + + &pushf (); + &cld (); + + &cmp (&wparam(5),0); + &je (&label("DECRYPT")); + + &lea ("ebp",&DWP(&label("AES_Te")."-".&label("pic_point"),"ebp")); + + # allocate aligned stack frame... + &lea ($key,&DWP(-64-244,"esp")); + &and ($key,-64); + + # ... and make sure it doesn't alias with AES_Te modulo 4096 + &mov ($s0,"ebp"); + &lea ($s1,&DWP(2048,"ebp")); + &mov ($s3,$key); + &and ($s0,0xfff); # s = %ebp&0xfff + &and ($s1,0xfff); # e = (%ebp+2048)&0xfff + &and ($s3,0xfff); # p = %esp&0xfff + + &cmp ($s3,$s1); # if (p>=e) %esp =- (p-e); + &jb (&label("te_break_out")); + &sub ($s3,$s1); + &sub ($key,$s3); + &jmp (&label("te_ok")); + &set_label("te_break_out"); # else %esp -= (p-s)&0xfff + framesz; + &sub ($s3,$s0); + &and ($s3,0xfff); + &add ($s3,64+256); + &sub ($key,$s3); + &align (4); + &set_label("te_ok"); + + &mov ($s0,&wparam(0)); # load inp + &mov ($s1,&wparam(1)); # load out + &mov ($s3,&wparam(3)); # load key + &mov ($acc,&wparam(4)); # load ivp + + &exch ("esp",$key); + &add ("esp",4); # reserve for return address! + &mov ($_esp,$key); # save %esp + + &mov ($_inp,$s0); # save copy of inp + &mov ($_out,$s1); # save copy of out + &mov ($_len,$s2); # save copy of len + &mov ($_key,$s3); # save copy of key + &mov ($_ivp,$acc); # save copy of ivp + + &mov ($mark,0); # copy of aes_key->rounds = 0; + if ($compromise) { + &cmp ($s2,$compromise); + &jb (&label("skip_ecopy")); + } + # do we copy key schedule to stack? + &mov ($s1 eq "ebx" ? $s1 : "",$s3); + &mov ($s2 eq "ecx" ? $s2 : "",244/4); + &sub ($s1,"ebp"); + &mov ("esi",$s3); + &and ($s1,0xfff); + &lea ("edi",$aes_key); + &cmp ($s1,2048); + &jb (&label("do_ecopy")); + &cmp ($s1,4096-244); + &jb (&label("skip_ecopy")); + &align (4); + &set_label("do_ecopy"); + &mov ($_key,"edi"); + &data_word(0xA5F3F689); # rep movsd + &set_label("skip_ecopy"); + + &mov ($acc,$s0); + &mov ($key,16); + &align (4); + &set_label("prefetch_te"); + &mov ($s0,&DWP(0,"ebp")); + &mov ($s1,&DWP(32,"ebp")); + &mov ($s2,&DWP(64,"ebp")); + &mov ($s3,&DWP(96,"ebp")); + &lea ("ebp",&DWP(128,"ebp")); + &dec ($key); + &jnz (&label("prefetch_te")); + &sub ("ebp",2048); + + &mov ($s2,$_len); + &mov ($key,$_ivp); + &test ($s2,0xFFFFFFF0); + &jz (&label("enc_tail")); # short input... + + &mov ($s0,&DWP(0,$key)); # load iv + &mov ($s1,&DWP(4,$key)); + + &align (4); + &set_label("enc_loop"); + &mov ($s2,&DWP(8,$key)); + &mov ($s3,&DWP(12,$key)); + + &xor ($s0,&DWP(0,$acc)); # xor input data + &xor ($s1,&DWP(4,$acc)); + &xor ($s2,&DWP(8,$acc)); + &xor ($s3,&DWP(12,$acc)); + + &mov ($key,$_key); # load key + &call ("_x86_AES_encrypt"); + + &mov ($acc,$_inp); # load inp + &mov ($key,$_out); # load out + + &mov (&DWP(0,$key),$s0); # save output data + &mov (&DWP(4,$key),$s1); + &mov (&DWP(8,$key),$s2); + &mov (&DWP(12,$key),$s3); + + &mov ($s2,$_len); # load len + + &lea ($acc,&DWP(16,$acc)); + &mov ($_inp,$acc); # save inp + + &lea ($s3,&DWP(16,$key)); + &mov ($_out,$s3); # save out + + &sub ($s2,16); + &test ($s2,0xFFFFFFF0); + &mov ($_len,$s2); # save len + &jnz (&label("enc_loop")); + &test ($s2,15); + &jnz (&label("enc_tail")); + &mov ($acc,$_ivp); # load ivp + &mov ($s2,&DWP(8,$key)); # restore last dwords + &mov ($s3,&DWP(12,$key)); + &mov (&DWP(0,$acc),$s0); # save ivec + &mov (&DWP(4,$acc),$s1); + &mov (&DWP(8,$acc),$s2); + &mov (&DWP(12,$acc),$s3); + + &cmp ($mark,0); # was the key schedule copied? + &mov ("edi",$_key); + &je (&label("skip_ezero")); + # zero copy of key schedule + &mov ("ecx",240/4); + &xor ("eax","eax"); + &align (4); + &data_word(0xABF3F689); # rep stosd + &set_label("skip_ezero") + &mov ("esp",$_esp); + &popf (); + &set_label("enc_out"); + &function_end_A(); + &pushf (); # kludge, never executed + + &align (4); + &set_label("enc_tail"); + &mov ($s0,$key eq "edi" ? $key : ""); + &mov ($key,$_out); # load out + &push ($s0); # push ivp + &mov ($s1,16); + &sub ($s1,$s2); + &cmp ($key,$acc); # compare with inp + &je (&label("enc_in_place")); + &align (4); + &data_word(0xA4F3F689); # rep movsb # copy input + &jmp (&label("enc_skip_in_place")); + &set_label("enc_in_place"); + &lea ($key,&DWP(0,$key,$s2)); + &set_label("enc_skip_in_place"); + &mov ($s2,$s1); + &xor ($s0,$s0); + &align (4); + &data_word(0xAAF3F689); # rep stosb # zero tail + &pop ($key); # pop ivp + + &mov ($acc,$_out); # output as input + &mov ($s0,&DWP(0,$key)); + &mov ($s1,&DWP(4,$key)); + &mov ($_len,16); # len=16 + &jmp (&label("enc_loop")); # one more spin... + +#----------------------------- DECRYPT -----------------------------# +&align (4); +&set_label("DECRYPT"); + &lea ("ebp",&DWP(&label("AES_Td")."-".&label("pic_point"),"ebp")); + + # allocate aligned stack frame... + &lea ($key,&DWP(-64-244,"esp")); + &and ($key,-64); + + # ... and make sure it doesn't alias with AES_Td modulo 4096 + &mov ($s0,"ebp"); + &lea ($s1,&DWP(2048+256,"ebp")); + &mov ($s3,$key); + &and ($s0,0xfff); # s = %ebp&0xfff + &and ($s1,0xfff); # e = (%ebp+2048+256)&0xfff + &and ($s3,0xfff); # p = %esp&0xfff + + &cmp ($s3,$s1); # if (p>=e) %esp =- (p-e); + &jb (&label("td_break_out")); + &sub ($s3,$s1); + &sub ($key,$s3); + &jmp (&label("td_ok")); + &set_label("td_break_out"); # else %esp -= (p-s)&0xfff + framesz; + &sub ($s3,$s0); + &and ($s3,0xfff); + &add ($s3,64+256); + &sub ($key,$s3); + &align (4); + &set_label("td_ok"); + + &mov ($s0,&wparam(0)); # load inp + &mov ($s1,&wparam(1)); # load out + &mov ($s3,&wparam(3)); # load key + &mov ($acc,&wparam(4)); # load ivp + + &exch ("esp",$key); + &add ("esp",4); # reserve for return address! + &mov ($_esp,$key); # save %esp + + &mov ($_inp,$s0); # save copy of inp + &mov ($_out,$s1); # save copy of out + &mov ($_len,$s2); # save copy of len + &mov ($_key,$s3); # save copy of key + &mov ($_ivp,$acc); # save copy of ivp + + &mov ($mark,0); # copy of aes_key->rounds = 0; + if ($compromise) { + &cmp ($s2,$compromise); + &jb (&label("skip_dcopy")); + } + # do we copy key schedule to stack? + &mov ($s1 eq "ebx" ? $s1 : "",$s3); + &mov ($s2 eq "ecx" ? $s2 : "",244/4); + &sub ($s1,"ebp"); + &mov ("esi",$s3); + &and ($s1,0xfff); + &lea ("edi",$aes_key); + &cmp ($s1,2048+256); + &jb (&label("do_dcopy")); + &cmp ($s1,4096-244); + &jb (&label("skip_dcopy")); + &align (4); + &set_label("do_dcopy"); + &mov ($_key,"edi"); + &data_word(0xA5F3F689); # rep movsd + &set_label("skip_dcopy"); + + &mov ($acc,$s0); + &mov ($key,18); + &align (4); + &set_label("prefetch_td"); + &mov ($s0,&DWP(0,"ebp")); + &mov ($s1,&DWP(32,"ebp")); + &mov ($s2,&DWP(64,"ebp")); + &mov ($s3,&DWP(96,"ebp")); + &lea ("ebp",&DWP(128,"ebp")); + &dec ($key); + &jnz (&label("prefetch_td")); + &sub ("ebp",2048+256); + + &cmp ($acc,$_out); + &je (&label("dec_in_place")); # in-place processing... + + &mov ($key,$_ivp); # load ivp + &mov ($_tmp,$key); + + &align (4); + &set_label("dec_loop"); + &mov ($s0,&DWP(0,$acc)); # read input + &mov ($s1,&DWP(4,$acc)); + &mov ($s2,&DWP(8,$acc)); + &mov ($s3,&DWP(12,$acc)); + + &mov ($key,$_key); # load key + &call ("_x86_AES_decrypt"); + + &mov ($key,$_tmp); # load ivp + &mov ($acc,$_len); # load len + &xor ($s0,&DWP(0,$key)); # xor iv + &xor ($s1,&DWP(4,$key)); + &xor ($s2,&DWP(8,$key)); + &xor ($s3,&DWP(12,$key)); + + &sub ($acc,16); + &jc (&label("dec_partial")); + &mov ($_len,$acc); # save len + &mov ($acc,$_inp); # load inp + &mov ($key,$_out); # load out + + &mov (&DWP(0,$key),$s0); # write output + &mov (&DWP(4,$key),$s1); + &mov (&DWP(8,$key),$s2); + &mov (&DWP(12,$key),$s3); + + &mov ($_tmp,$acc); # save ivp + &lea ($acc,&DWP(16,$acc)); + &mov ($_inp,$acc); # save inp + + &lea ($key,&DWP(16,$key)); + &mov ($_out,$key); # save out + + &jnz (&label("dec_loop")); + &mov ($key,$_tmp); # load temp ivp + &set_label("dec_end"); + &mov ($acc,$_ivp); # load user ivp + &mov ($s0,&DWP(0,$key)); # load iv + &mov ($s1,&DWP(4,$key)); + &mov ($s2,&DWP(8,$key)); + &mov ($s3,&DWP(12,$key)); + &mov (&DWP(0,$acc),$s0); # copy back to user + &mov (&DWP(4,$acc),$s1); + &mov (&DWP(8,$acc),$s2); + &mov (&DWP(12,$acc),$s3); + &jmp (&label("dec_out")); + + &align (4); + &set_label("dec_partial"); + &lea ($key,$ivec); + &mov (&DWP(0,$key),$s0); # dump output to stack + &mov (&DWP(4,$key),$s1); + &mov (&DWP(8,$key),$s2); + &mov (&DWP(12,$key),$s3); + &lea ($s2 eq "ecx" ? $s2 : "",&DWP(16,$acc)); + &mov ($acc eq "esi" ? $acc : "",$key); + &mov ($key eq "edi" ? $key : "",$_out); # load out + &data_word(0xA4F3F689); # rep movsb # copy output + &mov ($key,$_inp); # use inp as temp ivp + &jmp (&label("dec_end")); + + &align (4); + &set_label("dec_in_place"); + &set_label("dec_in_place_loop"); + &lea ($key,$ivec); + &mov ($s0,&DWP(0,$acc)); # read input + &mov ($s1,&DWP(4,$acc)); + &mov ($s2,&DWP(8,$acc)); + &mov ($s3,&DWP(12,$acc)); + + &mov (&DWP(0,$key),$s0); # copy to temp + &mov (&DWP(4,$key),$s1); + &mov (&DWP(8,$key),$s2); + &mov (&DWP(12,$key),$s3); + + &mov ($key,$_key); # load key + &call ("_x86_AES_decrypt"); + + &mov ($key,$_ivp); # load ivp + &mov ($acc,$_out); # load out + &xor ($s0,&DWP(0,$key)); # xor iv + &xor ($s1,&DWP(4,$key)); + &xor ($s2,&DWP(8,$key)); + &xor ($s3,&DWP(12,$key)); + + &mov (&DWP(0,$acc),$s0); # write output + &mov (&DWP(4,$acc),$s1); + &mov (&DWP(8,$acc),$s2); + &mov (&DWP(12,$acc),$s3); + + &lea ($acc,&DWP(16,$acc)); + &mov ($_out,$acc); # save out + + &lea ($acc,$ivec); + &mov ($s0,&DWP(0,$acc)); # read temp + &mov ($s1,&DWP(4,$acc)); + &mov ($s2,&DWP(8,$acc)); + &mov ($s3,&DWP(12,$acc)); + + &mov (&DWP(0,$key),$s0); # copy iv + &mov (&DWP(4,$key),$s1); + &mov (&DWP(8,$key),$s2); + &mov (&DWP(12,$key),$s3); + + &mov ($acc,$_inp); # load inp + + &lea ($acc,&DWP(16,$acc)); + &mov ($_inp,$acc); # save inp + + &mov ($s2,$_len); # load len + &sub ($s2,16); + &jc (&label("dec_in_place_partial")); + &mov ($_len,$s2); # save len + &jnz (&label("dec_in_place_loop")); + &jmp (&label("dec_out")); + + &align (4); + &set_label("dec_in_place_partial"); + # one can argue if this is actually required... + &mov ($key eq "edi" ? $key : "",$_out); + &lea ($acc eq "esi" ? $acc : "",$ivec); + &lea ($key,&DWP(0,$key,$s2)); + &lea ($acc,&DWP(16,$acc,$s2)); + &neg ($s2 eq "ecx" ? $s2 : ""); + &data_word(0xA4F3F689); # rep movsb # restore tail + + &align (4); + &set_label("dec_out"); + &cmp ($mark,0); # was the key schedule copied? + &mov ("edi",$_key); + &je (&label("skip_dzero")); + # zero copy of key schedule + &mov ("ecx",240/4); + &xor ("eax","eax"); + &align (4); + &data_word(0xABF3F689); # rep stosd + &set_label("skip_dzero") + &mov ("esp",$_esp); + &popf (); +&function_end("AES_cbc_encrypt"); +} + +#------------------------------------------------------------------# + +sub enckey() +{ + &movz ("esi",&LB("edx")); # rk[i]>>0 + &mov ("ebx",&DWP(2,"ebp","esi",8)); + &movz ("esi",&HB("edx")); # rk[i]>>8 + &and ("ebx",0xFF000000); + &xor ("eax","ebx"); + + &mov ("ebx",&DWP(2,"ebp","esi",8)); + &shr ("edx",16); + &and ("ebx",0x000000FF); + &movz ("esi",&LB("edx")); # rk[i]>>16 + &xor ("eax","ebx"); + + &mov ("ebx",&DWP(0,"ebp","esi",8)); + &movz ("esi",&HB("edx")); # rk[i]>>24 + &and ("ebx",0x0000FF00); + &xor ("eax","ebx"); + + &mov ("ebx",&DWP(0,"ebp","esi",8)); + &and ("ebx",0x00FF0000); + &xor ("eax","ebx"); + + &xor ("eax",&DWP(2048,"ebp","ecx",4)); # rcon +} + +# int AES_set_encrypt_key(const unsigned char *userKey, const int bits, +# AES_KEY *key) +&public_label("AES_Te"); +&function_begin("AES_set_encrypt_key"); + &mov ("esi",&wparam(0)); # user supplied key + &mov ("edi",&wparam(2)); # private key schedule + + &test ("esi",-1); + &jz (&label("badpointer")); + &test ("edi",-1); + &jz (&label("badpointer")); + + &call (&label("pic_point")); + &set_label("pic_point"); + &blindpop("ebp"); + &lea ("ebp",&DWP(&label("AES_Te")."-".&label("pic_point"),"ebp")); + + &mov ("ecx",&wparam(1)); # number of bits in key + &cmp ("ecx",128); + &je (&label("10rounds")); + &cmp ("ecx",192); + &je (&label("12rounds")); + &cmp ("ecx",256); + &je (&label("14rounds")); + &mov ("eax",-2); # invalid number of bits + &jmp (&label("exit")); + + &set_label("10rounds"); + &mov ("eax",&DWP(0,"esi")); # copy first 4 dwords + &mov ("ebx",&DWP(4,"esi")); + &mov ("ecx",&DWP(8,"esi")); + &mov ("edx",&DWP(12,"esi")); + &mov (&DWP(0,"edi"),"eax"); + &mov (&DWP(4,"edi"),"ebx"); + &mov (&DWP(8,"edi"),"ecx"); + &mov (&DWP(12,"edi"),"edx"); + + &xor ("ecx","ecx"); + &jmp (&label("10shortcut")); + + &align (4); + &set_label("10loop"); + &mov ("eax",&DWP(0,"edi")); # rk[0] + &mov ("edx",&DWP(12,"edi")); # rk[3] + &set_label("10shortcut"); + &enckey (); + + &mov (&DWP(16,"edi"),"eax"); # rk[4] + &xor ("eax",&DWP(4,"edi")); + &mov (&DWP(20,"edi"),"eax"); # rk[5] + &xor ("eax",&DWP(8,"edi")); + &mov (&DWP(24,"edi"),"eax"); # rk[6] + &xor ("eax",&DWP(12,"edi")); + &mov (&DWP(28,"edi"),"eax"); # rk[7] + &inc ("ecx"); + &add ("edi",16); + &cmp ("ecx",10); + &jl (&label("10loop")); + + &mov (&DWP(80,"edi"),10); # setup number of rounds + &xor ("eax","eax"); + &jmp (&label("exit")); + + &set_label("12rounds"); + &mov ("eax",&DWP(0,"esi")); # copy first 6 dwords + &mov ("ebx",&DWP(4,"esi")); + &mov ("ecx",&DWP(8,"esi")); + &mov ("edx",&DWP(12,"esi")); + &mov (&DWP(0,"edi"),"eax"); + &mov (&DWP(4,"edi"),"ebx"); + &mov (&DWP(8,"edi"),"ecx"); + &mov (&DWP(12,"edi"),"edx"); + &mov ("ecx",&DWP(16,"esi")); + &mov ("edx",&DWP(20,"esi")); + &mov (&DWP(16,"edi"),"ecx"); + &mov (&DWP(20,"edi"),"edx"); + + &xor ("ecx","ecx"); + &jmp (&label("12shortcut")); + + &align (4); + &set_label("12loop"); + &mov ("eax",&DWP(0,"edi")); # rk[0] + &mov ("edx",&DWP(20,"edi")); # rk[5] + &set_label("12shortcut"); + &enckey (); + + &mov (&DWP(24,"edi"),"eax"); # rk[6] + &xor ("eax",&DWP(4,"edi")); + &mov (&DWP(28,"edi"),"eax"); # rk[7] + &xor ("eax",&DWP(8,"edi")); + &mov (&DWP(32,"edi"),"eax"); # rk[8] + &xor ("eax",&DWP(12,"edi")); + &mov (&DWP(36,"edi"),"eax"); # rk[9] + + &cmp ("ecx",7); + &je (&label("12break")); + &inc ("ecx"); + + &xor ("eax",&DWP(16,"edi")); + &mov (&DWP(40,"edi"),"eax"); # rk[10] + &xor ("eax",&DWP(20,"edi")); + &mov (&DWP(44,"edi"),"eax"); # rk[11] + + &add ("edi",24); + &jmp (&label("12loop")); + + &set_label("12break"); + &mov (&DWP(72,"edi"),12); # setup number of rounds + &xor ("eax","eax"); + &jmp (&label("exit")); + + &set_label("14rounds"); + &mov ("eax",&DWP(0,"esi")); # copy first 8 dwords + &mov ("ebx",&DWP(4,"esi")); + &mov ("ecx",&DWP(8,"esi")); + &mov ("edx",&DWP(12,"esi")); + &mov (&DWP(0,"edi"),"eax"); + &mov (&DWP(4,"edi"),"ebx"); + &mov (&DWP(8,"edi"),"ecx"); + &mov (&DWP(12,"edi"),"edx"); + &mov ("eax",&DWP(16,"esi")); + &mov ("ebx",&DWP(20,"esi")); + &mov ("ecx",&DWP(24,"esi")); + &mov ("edx",&DWP(28,"esi")); + &mov (&DWP(16,"edi"),"eax"); + &mov (&DWP(20,"edi"),"ebx"); + &mov (&DWP(24,"edi"),"ecx"); + &mov (&DWP(28,"edi"),"edx"); + + &xor ("ecx","ecx"); + &jmp (&label("14shortcut")); + + &align (4); + &set_label("14loop"); + &mov ("edx",&DWP(28,"edi")); # rk[7] + &set_label("14shortcut"); + &mov ("eax",&DWP(0,"edi")); # rk[0] + + &enckey (); + + &mov (&DWP(32,"edi"),"eax"); # rk[8] + &xor ("eax",&DWP(4,"edi")); + &mov (&DWP(36,"edi"),"eax"); # rk[9] + &xor ("eax",&DWP(8,"edi")); + &mov (&DWP(40,"edi"),"eax"); # rk[10] + &xor ("eax",&DWP(12,"edi")); + &mov (&DWP(44,"edi"),"eax"); # rk[11] + + &cmp ("ecx",6); + &je (&label("14break")); + &inc ("ecx"); + + &mov ("edx","eax"); + &mov ("eax",&DWP(16,"edi")); # rk[4] + &movz ("esi",&LB("edx")); # rk[11]>>0 + &mov ("ebx",&DWP(2,"ebp","esi",8)); + &movz ("esi",&HB("edx")); # rk[11]>>8 + &and ("ebx",0x000000FF); + &xor ("eax","ebx"); + + &mov ("ebx",&DWP(0,"ebp","esi",8)); + &shr ("edx",16); + &and ("ebx",0x0000FF00); + &movz ("esi",&LB("edx")); # rk[11]>>16 + &xor ("eax","ebx"); + + &mov ("ebx",&DWP(0,"ebp","esi",8)); + &movz ("esi",&HB("edx")); # rk[11]>>24 + &and ("ebx",0x00FF0000); + &xor ("eax","ebx"); + + &mov ("ebx",&DWP(2,"ebp","esi",8)); + &and ("ebx",0xFF000000); + &xor ("eax","ebx"); + + &mov (&DWP(48,"edi"),"eax"); # rk[12] + &xor ("eax",&DWP(20,"edi")); + &mov (&DWP(52,"edi"),"eax"); # rk[13] + &xor ("eax",&DWP(24,"edi")); + &mov (&DWP(56,"edi"),"eax"); # rk[14] + &xor ("eax",&DWP(28,"edi")); + &mov (&DWP(60,"edi"),"eax"); # rk[15] + + &add ("edi",32); + &jmp (&label("14loop")); + + &set_label("14break"); + &mov (&DWP(48,"edi"),14); # setup number of rounds + &xor ("eax","eax"); + &jmp (&label("exit")); + + &set_label("badpointer"); + &mov ("eax",-1); + &set_label("exit"); +&function_end("AES_set_encrypt_key"); + +sub deckey() +{ my ($i,$ptr,$te,$td) = @_; + + &mov ("eax",&DWP($i,$ptr)); + &mov ("edx","eax"); + &movz ("ebx",&HB("eax")); + &shr ("edx",16); + &and ("eax",0xFF); + &movz ("eax",&BP(2,$te,"eax",8)); + &movz ("ebx",&BP(2,$te,"ebx",8)); + &mov ("eax",&DWP(0,$td,"eax",8)); + &xor ("eax",&DWP(3,$td,"ebx",8)); + &movz ("ebx",&HB("edx")); + &and ("edx",0xFF); + &movz ("edx",&BP(2,$te,"edx",8)); + &movz ("ebx",&BP(2,$te,"ebx",8)); + &xor ("eax",&DWP(2,$td,"edx",8)); + &xor ("eax",&DWP(1,$td,"ebx",8)); + &mov (&DWP($i,$ptr),"eax"); +} + +# int AES_set_decrypt_key(const unsigned char *userKey, const int bits, +# AES_KEY *key) +&public_label("AES_Td"); +&public_label("AES_Te"); +&function_begin_B("AES_set_decrypt_key"); + &mov ("eax",&wparam(0)); + &mov ("ecx",&wparam(1)); + &mov ("edx",&wparam(2)); + &sub ("esp",12); + &mov (&DWP(0,"esp"),"eax"); + &mov (&DWP(4,"esp"),"ecx"); + &mov (&DWP(8,"esp"),"edx"); + &call ("AES_set_encrypt_key"); + &add ("esp",12); + &cmp ("eax",0); + &je (&label("proceed")); + &ret (); + + &set_label("proceed"); + &push ("ebp"); + &push ("ebx"); + &push ("esi"); + &push ("edi"); + + &mov ("esi",&wparam(2)); + &mov ("ecx",&DWP(240,"esi")); # pull number of rounds + &lea ("ecx",&DWP(0,"","ecx",4)); + &lea ("edi",&DWP(0,"esi","ecx",4)); # pointer to last chunk + + &align (4); + &set_label("invert"); # invert order of chunks + &mov ("eax",&DWP(0,"esi")); + &mov ("ebx",&DWP(4,"esi")); + &mov ("ecx",&DWP(0,"edi")); + &mov ("edx",&DWP(4,"edi")); + &mov (&DWP(0,"edi"),"eax"); + &mov (&DWP(4,"edi"),"ebx"); + &mov (&DWP(0,"esi"),"ecx"); + &mov (&DWP(4,"esi"),"edx"); + &mov ("eax",&DWP(8,"esi")); + &mov ("ebx",&DWP(12,"esi")); + &mov ("ecx",&DWP(8,"edi")); + &mov ("edx",&DWP(12,"edi")); + &mov (&DWP(8,"edi"),"eax"); + &mov (&DWP(12,"edi"),"ebx"); + &mov (&DWP(8,"esi"),"ecx"); + &mov (&DWP(12,"esi"),"edx"); + &add ("esi",16); + &sub ("edi",16); + &cmp ("esi","edi"); + &jne (&label("invert")); + + &call (&label("pic_point")); + &set_label("pic_point"); + blindpop("ebp"); + &lea ("edi",&DWP(&label("AES_Td")."-".&label("pic_point"),"ebp")); + &lea ("ebp",&DWP(&label("AES_Te")."-".&label("pic_point"),"ebp")); + + &mov ("esi",&wparam(2)); + &mov ("ecx",&DWP(240,"esi")); # pull number of rounds + &dec ("ecx"); + &align (4); + &set_label("permute"); # permute the key schedule + &add ("esi",16); + &deckey (0,"esi","ebp","edi"); + &deckey (4,"esi","ebp","edi"); + &deckey (8,"esi","ebp","edi"); + &deckey (12,"esi","ebp","edi"); + &dec ("ecx"); + &jnz (&label("permute")); + + &xor ("eax","eax"); # return success +&function_end("AES_set_decrypt_key"); + +&asm_finish(); |