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# ====================================================================
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# Written by Andy Polyakov <appro@fy.chalmers.se> for the OpenSSL
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# project. Rights for redistribution and usage in source and binary
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# forms are granted according to the OpenSSL license.
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# ====================================================================
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# You might fail to appreciate this module performance from the first
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# try. If compared to "vanilla" linux-ia32-icc target, i.e. considered
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# to be *the* best Intel C compiler without -KPIC, performance appears
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# to be virtually identical... But try to re-configure with shared
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# library support... Aha! Intel compiler "suddenly" lags behind by 30%
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# [on P4, more on others]:-) And if compared to position-independent
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# code generated by GNU C, this code performs *more* than *twice* as
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# fast! Yes, all this buzz about PIC means that unlike other hand-
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# coded implementations, this one was explicitly designed to be safe
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# to use even in shared library context... This also means that this
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# code isn't necessarily absolutely fastest "ever," because in order
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# to achieve position independence an extra register has to be
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# off-loaded to stack, which affects the benchmark result.
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# Special note about instruction choice. Do you recall RC4_INT code
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# performing poorly on P4? It might be the time to figure out why.
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# RC4_INT code implies effective address calculations in base+offset*4
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# form. Trouble is that it seems that offset scaling turned to be
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# critical path... At least eliminating scaling resulted in 2.8x RC4
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# performance improvement [as you might recall]. As AES code is hungry
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# for scaling too, I [try to] avoid the latter by favoring off-by-2
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# shifts and masking the result with 0xFF<<2 instead of "boring" 0xFF.
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# As was shown by Dean Gaudet <dean@arctic.org>, the above note turned
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# void. Performance improvement with off-by-2 shifts was observed on
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# intermediate implementation, which was spilling yet another register
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# to stack... Final offset*4 code below runs just a tad faster on P4,
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# but exhibits up to 10% improvement on other cores.
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# Second version is "monolithic" replacement for aes_core.c, which in
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# addition to AES_[de|en]crypt implements AES_set_[de|en]cryption_key.
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# This made it possible to implement little-endian variant of the
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# algorithm without modifying the base C code. Motivating factor for
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# the undertaken effort was that it appeared that in tight IA-32
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# register window little-endian flavor could achieve slightly higher
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# Instruction Level Parallelism, and it indeed resulted in up to 15%
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# better performance on most recent �-archs...
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# Third version adds AES_cbc_encrypt implementation, which resulted in
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# up to 40% performance imrovement of CBC benchmark results. 40% was
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# observed on P4 core, where "overall" imrovement coefficient, i.e. if
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# compared to PIC generated by GCC and in CBC mode, was observed to be
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# as large as 4x:-) CBC performance is virtually identical to ECB now
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# and on some platforms even better, e.g. 17.6 "small" cycles/byte on
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# Opteron, because certain function prologues and epilogues are
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# effectively taken out of the loop...
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# Version 3.2 implements compressed tables and prefetch of these tables
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# in CBC[!] mode. Former means that 3/4 of table references are now
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# misaligned, which unfortunately has negative impact on elder IA-32
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# implementations, Pentium suffered 30% penalty, PIII - 10%.
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# Version 3.3 avoids L1 cache aliasing between stack frame and
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# S-boxes, and 3.4 - L1 cache aliasing even between key schedule. The
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# latter is achieved by copying the key schedule to controlled place in
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# stack. This unfortunately has rather strong impact on small block CBC
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# performance, ~2x deterioration on 16-byte block if compared to 3.3.
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# Current ECB performance numbers for 128-bit key in CPU cycles per
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# processed byte [measure commonly used by AES benchmarkers] are:
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# small footprint fully unrolled
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push(@INC,"perlasm","../../perlasm");
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&asm_init($ARGV[0],"aes-586.pl",$ARGV[$#ARGV] eq "386");
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$compromise=0; # $compromise=128 abstains from copying key
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# schedule to stack when encrypting inputs
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# shorter than 128 bytes at the cost of
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# risksing aliasing with S-boxes. In return
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# you get way better, up to +70%, small block
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$small_footprint=1; # $small_footprint=1 code is ~5% slower [on
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# recent �-archs], but ~5 times smaller!
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# I favor compact code to minimize cache
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# contention and in hope to "collect" 5% back
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# in real-life applications...
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$vertical_spin=0; # shift "verticaly" defaults to 0, because of
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# its proof-of-concept status...
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# Note that there is no decvert(), as well as last encryption round is
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# performed with "horizontal" shifts. This is because this "vertical"
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# implementation [one which groups shifts on a given $s[i] to form a
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# "column," unlike "horizontal" one, which groups shifts on different
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# $s[i] to form a "row"] is work in progress. It was observed to run
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# few percents faster on Intel cores, but not AMD. On AMD K8 core it's
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# whole 12% slower:-( So we face a trade-off... Shall it be resolved
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# some day? Till then the code is considered experimental and by
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# default remains dormant...
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my $v0 = $acc, $v1 = $key;
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&mov ($v0,$s[3]); # copy s3
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&mov (&DWP(4,"esp"),$s[2]); # save s2
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&mov ($v1,$s[0]); # copy s0
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&mov (&DWP(8,"esp"),$s[1]); # save s1
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&movz ($s[2],&HB($s[0]));
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&mov ($s[0],&DWP(0,$te,$s[0],8)); # s0>>0
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&mov ($s[3],&DWP(3,$te,$s[2],8)); # s0>>8
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&movz ($s[1],&HB($v1));
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&mov ($s[2],&DWP(2,$te,$v1,8)); # s0>>16
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&mov ($s[1],&DWP(1,$te,$s[1],8)); # s0>>24
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&xor ($s[3],&DWP(0,$te,$v0,8)); # s3>>0
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&movz ($v0,&HB($v1));
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&xor ($s[2],&DWP(3,$te,$v0,8)); # s3>>8
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&movz ($v0,&HB($v1));
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&xor ($s[1],&DWP(2,$te,$v1,8)); # s3>>16
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&mov ($v1,&DWP(4,"esp")); # restore s2
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&xor ($s[0],&DWP(1,$te,$v0,8)); # s3>>24
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&xor ($s[2],&DWP(0,$te,$v1,8)); # s2>>0
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&movz ($v1,&HB($v0));
150
&xor ($s[1],&DWP(3,$te,$v1,8)); # s2>>8
151
&movz ($v1,&HB($v0));
153
&xor ($s[0],&DWP(2,$te,$v0,8)); # s2>>16
154
&mov ($v0,&DWP(8,"esp")); # restore s1
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&xor ($s[3],&DWP(1,$te,$v1,8)); # s2>>24
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&xor ($s[1],&DWP(0,$te,$v0,8)); # s1>>0
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&movz ($v0,&HB($v1));
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&xor ($s[0],&DWP(3,$te,$v0,8)); # s1>>8
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&movz ($v0,&HB($v1));
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&xor ($s[3],&DWP(2,$te,$v1,8)); # s1>>16
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&mov ($key,&DWP(12,"esp")); # reincarnate v1 as key
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&xor ($s[2],&DWP(1,$te,$v0,8)); # s1>>24
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{ my ($i,$te,@s) = @_;
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my $out = $i==3?$s[0]:$acc;
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# lines marked with #%e?x[i] denote "reordered" instructions...
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if ($i==3) { &mov ($key,&DWP(12,"esp")); }##%edx
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else { &mov ($out,$s[0]);
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if ($i==1) { &shr ($s[0],16); }#%ebx[1]
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if ($i==2) { &shr ($s[0],24); }#%ecx[2]
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&mov ($out,&DWP(0,$te,$out,8));
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if ($i==3) { $tmp=$s[1]; }##%eax
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&movz ($tmp,&HB($s[1]));
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&xor ($out,&DWP(3,$te,$tmp,8));
187
if ($i==3) { $tmp=$s[2]; &mov ($s[1],&DWP(4,"esp")); }##%ebx
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else { &mov ($tmp,$s[2]);
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if ($i==2) { &and ($s[1],0xFF); }#%edx[2]
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&xor ($out,&DWP(2,$te,$tmp,8));
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if ($i==3) { $tmp=$s[3]; &mov ($s[2],&DWP(8,"esp")); }##%ecx
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elsif($i==2){ &movz ($tmp,&HB($s[3])); }#%ebx[2]
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else { &mov ($tmp,$s[3]);
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&xor ($out,&DWP(1,$te,$tmp,8));
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if ($i<2) { &mov (&DWP(4+4*$i,"esp"),$out); }
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if ($i==3) { &mov ($s[3],$acc); }
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my $out = $i==3?$s[0]:$acc;
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if ($i==3) { &mov ($key,&DWP(12,"esp")); }##%edx
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else { &mov ($out,$s[0]); }
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if ($i==1) { &shr ($s[0],16); }#%ebx[1]
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if ($i==2) { &shr ($s[0],24); }#%ecx[2]
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&mov ($out,&DWP(2,$te,$out,8));
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&and ($out,0x000000ff);
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if ($i==3) { $tmp=$s[1]; }##%eax
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&movz ($tmp,&HB($s[1]));
219
&mov ($tmp,&DWP(0,$te,$tmp,8));
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&and ($tmp,0x0000ff00);
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if ($i==3) { $tmp=$s[2]; &mov ($s[1],&DWP(4,"esp")); }##%ebx
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else { mov ($tmp,$s[2]);
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if ($i==2) { &and ($s[1],0xFF); }#%edx[2]
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&mov ($tmp,&DWP(0,$te,$tmp,8));
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&and ($tmp,0x00ff0000);
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if ($i==3) { $tmp=$s[3]; &mov ($s[2],&DWP(8,"esp")); }##%ecx
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elsif($i==2){ &movz ($tmp,&HB($s[3])); }#%ebx[2]
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else { &mov ($tmp,$s[3]);
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&mov ($tmp,&DWP(2,$te,$tmp,8));
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&and ($tmp,0xff000000);
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if ($i<2) { &mov (&DWP(4+4*$i,"esp"),$out); }
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if ($i==3) { &mov ($s[3],$acc); }
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sub _data_word() { my $i; while(defined($i=shift)) { &data_word($i,$i); } }
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&public_label("AES_Te");
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&function_begin_B("_x86_AES_encrypt");
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if ($vertical_spin) {
248
# I need high parts of volatile registers to be accessible...
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&exch ($s1="edi",$key="ebx");
250
&mov ($s2="esi",$acc="ecx");
253
# note that caller is expected to allocate stack frame for me!
254
&mov (&DWP(12,"esp"),$key); # save key
256
&xor ($s0,&DWP(0,$key)); # xor with key
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&xor ($s1,&DWP(4,$key));
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&xor ($s2,&DWP(8,$key));
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&xor ($s3,&DWP(12,$key));
261
&mov ($acc,&DWP(240,$key)); # load key->rounds
263
if ($small_footprint) {
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&lea ($acc,&DWP(-2,$acc,$acc));
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&lea ($acc,&DWP(0,$key,$acc,8));
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&mov (&DWP(16,"esp"),$acc); # end of key schedule
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if ($vertical_spin) {
270
&encvert("ebp",$s0,$s1,$s2,$s3);
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&encstep(0,"ebp",$s0,$s1,$s2,$s3);
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&encstep(1,"ebp",$s1,$s2,$s3,$s0);
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&encstep(2,"ebp",$s2,$s3,$s0,$s1);
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&encstep(3,"ebp",$s3,$s0,$s1,$s2);
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&add ($key,16); # advance rd_key
278
&xor ($s0,&DWP(0,$key));
279
&xor ($s1,&DWP(4,$key));
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&xor ($s2,&DWP(8,$key));
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&xor ($s3,&DWP(12,$key));
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&cmp ($key,&DWP(16,"esp"));
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&mov (&DWP(12,"esp"),$key);
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&jb (&label("loop"));
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&jle (&label("10rounds"));
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&jle (&label("12rounds"));
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&set_label("14rounds");
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for ($i=1;$i<3;$i++) {
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if ($vertical_spin) {
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&encvert("ebp",$s0,$s1,$s2,$s3);
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&encstep(0,"ebp",$s0,$s1,$s2,$s3);
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&encstep(1,"ebp",$s1,$s2,$s3,$s0);
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&encstep(2,"ebp",$s2,$s3,$s0,$s1);
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&encstep(3,"ebp",$s3,$s0,$s1,$s2);
302
&xor ($s0,&DWP(16*$i+0,$key));
303
&xor ($s1,&DWP(16*$i+4,$key));
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&xor ($s2,&DWP(16*$i+8,$key));
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&xor ($s3,&DWP(16*$i+12,$key));
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&mov (&DWP(12,"esp"),$key); # advance rd_key
309
&set_label("12rounds");
310
for ($i=1;$i<3;$i++) {
311
if ($vertical_spin) {
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&encvert("ebp",$s0,$s1,$s2,$s3);
314
&encstep(0,"ebp",$s0,$s1,$s2,$s3);
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&encstep(1,"ebp",$s1,$s2,$s3,$s0);
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&encstep(2,"ebp",$s2,$s3,$s0,$s1);
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&encstep(3,"ebp",$s3,$s0,$s1,$s2);
319
&xor ($s0,&DWP(16*$i+0,$key));
320
&xor ($s1,&DWP(16*$i+4,$key));
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&xor ($s2,&DWP(16*$i+8,$key));
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&xor ($s3,&DWP(16*$i+12,$key));
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&mov (&DWP(12,"esp"),$key); # advance rd_key
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&set_label("10rounds");
327
for ($i=1;$i<10;$i++) {
328
if ($vertical_spin) {
329
&encvert("ebp",$s0,$s1,$s2,$s3);
331
&encstep(0,"ebp",$s0,$s1,$s2,$s3);
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&encstep(1,"ebp",$s1,$s2,$s3,$s0);
333
&encstep(2,"ebp",$s2,$s3,$s0,$s1);
334
&encstep(3,"ebp",$s3,$s0,$s1,$s2);
336
&xor ($s0,&DWP(16*$i+0,$key));
337
&xor ($s1,&DWP(16*$i+4,$key));
338
&xor ($s2,&DWP(16*$i+8,$key));
339
&xor ($s3,&DWP(16*$i+12,$key));
343
if ($vertical_spin) {
344
# "reincarnate" some registers for "horizontal" spin...
345
&mov ($s1="ebx",$key="edi");
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&mov ($s2="ecx",$acc="esi");
348
&enclast(0,"ebp",$s0,$s1,$s2,$s3);
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&enclast(1,"ebp",$s1,$s2,$s3,$s0);
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&enclast(2,"ebp",$s2,$s3,$s0,$s1);
351
&enclast(3,"ebp",$s3,$s0,$s1,$s2);
353
&add ($key,$small_footprint?16:160);
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&xor ($s0,&DWP(0,$key));
355
&xor ($s1,&DWP(4,$key));
356
&xor ($s2,&DWP(8,$key));
357
&xor ($s3,&DWP(12,$key));
361
&set_label("AES_Te",64); # Yes! I keep it in the code segment!
362
&_data_word(0xa56363c6, 0x847c7cf8, 0x997777ee, 0x8d7b7bf6);
363
&_data_word(0x0df2f2ff, 0xbd6b6bd6, 0xb16f6fde, 0x54c5c591);
364
&_data_word(0x50303060, 0x03010102, 0xa96767ce, 0x7d2b2b56);
365
&_data_word(0x19fefee7, 0x62d7d7b5, 0xe6abab4d, 0x9a7676ec);
366
&_data_word(0x45caca8f, 0x9d82821f, 0x40c9c989, 0x877d7dfa);
367
&_data_word(0x15fafaef, 0xeb5959b2, 0xc947478e, 0x0bf0f0fb);
368
&_data_word(0xecadad41, 0x67d4d4b3, 0xfda2a25f, 0xeaafaf45);
369
&_data_word(0xbf9c9c23, 0xf7a4a453, 0x967272e4, 0x5bc0c09b);
370
&_data_word(0xc2b7b775, 0x1cfdfde1, 0xae93933d, 0x6a26264c);
371
&_data_word(0x5a36366c, 0x413f3f7e, 0x02f7f7f5, 0x4fcccc83);
372
&_data_word(0x5c343468, 0xf4a5a551, 0x34e5e5d1, 0x08f1f1f9);
373
&_data_word(0x937171e2, 0x73d8d8ab, 0x53313162, 0x3f15152a);
374
&_data_word(0x0c040408, 0x52c7c795, 0x65232346, 0x5ec3c39d);
375
&_data_word(0x28181830, 0xa1969637, 0x0f05050a, 0xb59a9a2f);
376
&_data_word(0x0907070e, 0x36121224, 0x9b80801b, 0x3de2e2df);
377
&_data_word(0x26ebebcd, 0x6927274e, 0xcdb2b27f, 0x9f7575ea);
378
&_data_word(0x1b090912, 0x9e83831d, 0x742c2c58, 0x2e1a1a34);
379
&_data_word(0x2d1b1b36, 0xb26e6edc, 0xee5a5ab4, 0xfba0a05b);
380
&_data_word(0xf65252a4, 0x4d3b3b76, 0x61d6d6b7, 0xceb3b37d);
381
&_data_word(0x7b292952, 0x3ee3e3dd, 0x712f2f5e, 0x97848413);
382
&_data_word(0xf55353a6, 0x68d1d1b9, 0x00000000, 0x2cededc1);
383
&_data_word(0x60202040, 0x1ffcfce3, 0xc8b1b179, 0xed5b5bb6);
384
&_data_word(0xbe6a6ad4, 0x46cbcb8d, 0xd9bebe67, 0x4b393972);
385
&_data_word(0xde4a4a94, 0xd44c4c98, 0xe85858b0, 0x4acfcf85);
386
&_data_word(0x6bd0d0bb, 0x2aefefc5, 0xe5aaaa4f, 0x16fbfbed);
387
&_data_word(0xc5434386, 0xd74d4d9a, 0x55333366, 0x94858511);
388
&_data_word(0xcf45458a, 0x10f9f9e9, 0x06020204, 0x817f7ffe);
389
&_data_word(0xf05050a0, 0x443c3c78, 0xba9f9f25, 0xe3a8a84b);
390
&_data_word(0xf35151a2, 0xfea3a35d, 0xc0404080, 0x8a8f8f05);
391
&_data_word(0xad92923f, 0xbc9d9d21, 0x48383870, 0x04f5f5f1);
392
&_data_word(0xdfbcbc63, 0xc1b6b677, 0x75dadaaf, 0x63212142);
393
&_data_word(0x30101020, 0x1affffe5, 0x0ef3f3fd, 0x6dd2d2bf);
394
&_data_word(0x4ccdcd81, 0x140c0c18, 0x35131326, 0x2fececc3);
395
&_data_word(0xe15f5fbe, 0xa2979735, 0xcc444488, 0x3917172e);
396
&_data_word(0x57c4c493, 0xf2a7a755, 0x827e7efc, 0x473d3d7a);
397
&_data_word(0xac6464c8, 0xe75d5dba, 0x2b191932, 0x957373e6);
398
&_data_word(0xa06060c0, 0x98818119, 0xd14f4f9e, 0x7fdcdca3);
399
&_data_word(0x66222244, 0x7e2a2a54, 0xab90903b, 0x8388880b);
400
&_data_word(0xca46468c, 0x29eeeec7, 0xd3b8b86b, 0x3c141428);
401
&_data_word(0x79dedea7, 0xe25e5ebc, 0x1d0b0b16, 0x76dbdbad);
402
&_data_word(0x3be0e0db, 0x56323264, 0x4e3a3a74, 0x1e0a0a14);
403
&_data_word(0xdb494992, 0x0a06060c, 0x6c242448, 0xe45c5cb8);
404
&_data_word(0x5dc2c29f, 0x6ed3d3bd, 0xefacac43, 0xa66262c4);
405
&_data_word(0xa8919139, 0xa4959531, 0x37e4e4d3, 0x8b7979f2);
406
&_data_word(0x32e7e7d5, 0x43c8c88b, 0x5937376e, 0xb76d6dda);
407
&_data_word(0x8c8d8d01, 0x64d5d5b1, 0xd24e4e9c, 0xe0a9a949);
408
&_data_word(0xb46c6cd8, 0xfa5656ac, 0x07f4f4f3, 0x25eaeacf);
409
&_data_word(0xaf6565ca, 0x8e7a7af4, 0xe9aeae47, 0x18080810);
410
&_data_word(0xd5baba6f, 0x887878f0, 0x6f25254a, 0x722e2e5c);
411
&_data_word(0x241c1c38, 0xf1a6a657, 0xc7b4b473, 0x51c6c697);
412
&_data_word(0x23e8e8cb, 0x7cdddda1, 0x9c7474e8, 0x211f1f3e);
413
&_data_word(0xdd4b4b96, 0xdcbdbd61, 0x868b8b0d, 0x858a8a0f);
414
&_data_word(0x907070e0, 0x423e3e7c, 0xc4b5b571, 0xaa6666cc);
415
&_data_word(0xd8484890, 0x05030306, 0x01f6f6f7, 0x120e0e1c);
416
&_data_word(0xa36161c2, 0x5f35356a, 0xf95757ae, 0xd0b9b969);
417
&_data_word(0x91868617, 0x58c1c199, 0x271d1d3a, 0xb99e9e27);
418
&_data_word(0x38e1e1d9, 0x13f8f8eb, 0xb398982b, 0x33111122);
419
&_data_word(0xbb6969d2, 0x70d9d9a9, 0x898e8e07, 0xa7949433);
420
&_data_word(0xb69b9b2d, 0x221e1e3c, 0x92878715, 0x20e9e9c9);
421
&_data_word(0x49cece87, 0xff5555aa, 0x78282850, 0x7adfdfa5);
422
&_data_word(0x8f8c8c03, 0xf8a1a159, 0x80898909, 0x170d0d1a);
423
&_data_word(0xdabfbf65, 0x31e6e6d7, 0xc6424284, 0xb86868d0);
424
&_data_word(0xc3414182, 0xb0999929, 0x772d2d5a, 0x110f0f1e);
425
&_data_word(0xcbb0b07b, 0xfc5454a8, 0xd6bbbb6d, 0x3a16162c);
427
&data_word(0x00000001, 0x00000002, 0x00000004, 0x00000008);
428
&data_word(0x00000010, 0x00000020, 0x00000040, 0x00000080);
429
&data_word(0x0000001b, 0x00000036, 0, 0, 0, 0, 0, 0);
430
&function_end_B("_x86_AES_encrypt");
432
# void AES_encrypt (const void *inp,void *out,const AES_KEY *key);
433
&public_label("AES_Te");
434
&function_begin("AES_encrypt");
435
&mov ($acc,&wparam(0)); # load inp
436
&mov ($key,&wparam(2)); # load key
442
&mov (&DWP(16,"esp"),$s0);
444
&call (&label("pic_point")); # make it PIC!
445
&set_label("pic_point");
447
&lea ("ebp",&DWP(&label("AES_Te")."-".&label("pic_point"),"ebp"));
449
&mov ($s0,&DWP(0,$acc)); # load input data
450
&mov ($s1,&DWP(4,$acc));
451
&mov ($s2,&DWP(8,$acc));
452
&mov ($s3,&DWP(12,$acc));
454
&call ("_x86_AES_encrypt");
456
&mov ("esp",&DWP(16,"esp"));
458
&mov ($acc,&wparam(1)); # load out
459
&mov (&DWP(0,$acc),$s0); # write output data
460
&mov (&DWP(4,$acc),$s1);
461
&mov (&DWP(8,$acc),$s2);
462
&mov (&DWP(12,$acc),$s3);
463
&function_end("AES_encrypt");
465
#------------------------------------------------------------------#
468
{ my ($i,$td,@s) = @_;
470
my $out = $i==3?$s[0]:$acc;
472
# no instructions are reordered, as performance appears
473
# optimal... or rather that all attempts to reorder didn't
474
# result in better performance [which by the way is not a
475
# bit lower than ecryption].
476
if($i==3) { &mov ($key,&DWP(12,"esp")); }
477
else { &mov ($out,$s[0]); }
479
&mov ($out,&DWP(0,$td,$out,8));
481
if ($i==3) { $tmp=$s[1]; }
482
&movz ($tmp,&HB($s[1]));
483
&xor ($out,&DWP(3,$td,$tmp,8));
485
if ($i==3) { $tmp=$s[2]; &mov ($s[1],$acc); }
486
else { &mov ($tmp,$s[2]); }
489
&xor ($out,&DWP(2,$td,$tmp,8));
491
if ($i==3) { $tmp=$s[3]; &mov ($s[2],&DWP(8,"esp")); }
492
else { &mov ($tmp,$s[3]); }
494
&xor ($out,&DWP(1,$td,$tmp,8));
495
if ($i<2) { &mov (&DWP(4+4*$i,"esp"),$out); }
496
if ($i==3) { &mov ($s[3],&DWP(4,"esp")); }
503
my $out = $i==3?$s[0]:$acc;
505
if($i==3) { &mov ($key,&DWP(12,"esp")); }
506
else { &mov ($out,$s[0]); }
508
&mov ($out,&DWP(2048,$td,$out,4));
509
&and ($out,0x000000ff);
511
if ($i==3) { $tmp=$s[1]; }
512
&movz ($tmp,&HB($s[1]));
513
&mov ($tmp,&DWP(2048,$td,$tmp,4));
514
&and ($tmp,0x0000ff00);
517
if ($i==3) { $tmp=$s[2]; &mov ($s[1],$acc); }
518
else { mov ($tmp,$s[2]); }
521
&mov ($tmp,&DWP(2048,$td,$tmp,4));
522
&and ($tmp,0x00ff0000);
525
if ($i==3) { $tmp=$s[3]; &mov ($s[2],&DWP(8,"esp")); }
526
else { &mov ($tmp,$s[3]); }
528
&mov ($tmp,&DWP(2048,$td,$tmp,4));
529
&and ($tmp,0xff000000);
531
if ($i<2) { &mov (&DWP(4+4*$i,"esp"),$out); }
532
if ($i==3) { &mov ($s[3],&DWP(4,"esp")); }
535
&public_label("AES_Td");
536
&function_begin_B("_x86_AES_decrypt");
537
# note that caller is expected to allocate stack frame for me!
538
&mov (&DWP(12,"esp"),$key); # save key
540
&xor ($s0,&DWP(0,$key)); # xor with key
541
&xor ($s1,&DWP(4,$key));
542
&xor ($s2,&DWP(8,$key));
543
&xor ($s3,&DWP(12,$key));
545
&mov ($acc,&DWP(240,$key)); # load key->rounds
547
if ($small_footprint) {
548
&lea ($acc,&DWP(-2,$acc,$acc));
549
&lea ($acc,&DWP(0,$key,$acc,8));
550
&mov (&DWP(16,"esp"),$acc); # end of key schedule
553
&decstep(0,"ebp",$s0,$s3,$s2,$s1);
554
&decstep(1,"ebp",$s1,$s0,$s3,$s2);
555
&decstep(2,"ebp",$s2,$s1,$s0,$s3);
556
&decstep(3,"ebp",$s3,$s2,$s1,$s0);
557
&add ($key,16); # advance rd_key
558
&xor ($s0,&DWP(0,$key));
559
&xor ($s1,&DWP(4,$key));
560
&xor ($s2,&DWP(8,$key));
561
&xor ($s3,&DWP(12,$key));
562
&cmp ($key,&DWP(16,"esp"));
563
&mov (&DWP(12,"esp"),$key);
564
&jb (&label("loop"));
568
&jle (&label("10rounds"));
570
&jle (&label("12rounds"));
572
&set_label("14rounds");
573
for ($i=1;$i<3;$i++) {
574
&decstep(0,"ebp",$s0,$s3,$s2,$s1);
575
&decstep(1,"ebp",$s1,$s0,$s3,$s2);
576
&decstep(2,"ebp",$s2,$s1,$s0,$s3);
577
&decstep(3,"ebp",$s3,$s2,$s1,$s0);
578
&xor ($s0,&DWP(16*$i+0,$key));
579
&xor ($s1,&DWP(16*$i+4,$key));
580
&xor ($s2,&DWP(16*$i+8,$key));
581
&xor ($s3,&DWP(16*$i+12,$key));
584
&mov (&DWP(12,"esp"),$key); # advance rd_key
585
&set_label("12rounds");
586
for ($i=1;$i<3;$i++) {
587
&decstep(0,"ebp",$s0,$s3,$s2,$s1);
588
&decstep(1,"ebp",$s1,$s0,$s3,$s2);
589
&decstep(2,"ebp",$s2,$s1,$s0,$s3);
590
&decstep(3,"ebp",$s3,$s2,$s1,$s0);
591
&xor ($s0,&DWP(16*$i+0,$key));
592
&xor ($s1,&DWP(16*$i+4,$key));
593
&xor ($s2,&DWP(16*$i+8,$key));
594
&xor ($s3,&DWP(16*$i+12,$key));
597
&mov (&DWP(12,"esp"),$key); # advance rd_key
598
&set_label("10rounds");
599
for ($i=1;$i<10;$i++) {
600
&decstep(0,"ebp",$s0,$s3,$s2,$s1);
601
&decstep(1,"ebp",$s1,$s0,$s3,$s2);
602
&decstep(2,"ebp",$s2,$s1,$s0,$s3);
603
&decstep(3,"ebp",$s3,$s2,$s1,$s0);
604
&xor ($s0,&DWP(16*$i+0,$key));
605
&xor ($s1,&DWP(16*$i+4,$key));
606
&xor ($s2,&DWP(16*$i+8,$key));
607
&xor ($s3,&DWP(16*$i+12,$key));
611
&declast(0,"ebp",$s0,$s3,$s2,$s1);
612
&declast(1,"ebp",$s1,$s0,$s3,$s2);
613
&declast(2,"ebp",$s2,$s1,$s0,$s3);
614
&declast(3,"ebp",$s3,$s2,$s1,$s0);
616
&add ($key,$small_footprint?16:160);
617
&xor ($s0,&DWP(0,$key));
618
&xor ($s1,&DWP(4,$key));
619
&xor ($s2,&DWP(8,$key));
620
&xor ($s3,&DWP(12,$key));
624
&set_label("AES_Td",64); # Yes! I keep it in the code segment!
625
&_data_word(0x50a7f451, 0x5365417e, 0xc3a4171a, 0x965e273a);
626
&_data_word(0xcb6bab3b, 0xf1459d1f, 0xab58faac, 0x9303e34b);
627
&_data_word(0x55fa3020, 0xf66d76ad, 0x9176cc88, 0x254c02f5);
628
&_data_word(0xfcd7e54f, 0xd7cb2ac5, 0x80443526, 0x8fa362b5);
629
&_data_word(0x495ab1de, 0x671bba25, 0x980eea45, 0xe1c0fe5d);
630
&_data_word(0x02752fc3, 0x12f04c81, 0xa397468d, 0xc6f9d36b);
631
&_data_word(0xe75f8f03, 0x959c9215, 0xeb7a6dbf, 0xda595295);
632
&_data_word(0x2d83bed4, 0xd3217458, 0x2969e049, 0x44c8c98e);
633
&_data_word(0x6a89c275, 0x78798ef4, 0x6b3e5899, 0xdd71b927);
634
&_data_word(0xb64fe1be, 0x17ad88f0, 0x66ac20c9, 0xb43ace7d);
635
&_data_word(0x184adf63, 0x82311ae5, 0x60335197, 0x457f5362);
636
&_data_word(0xe07764b1, 0x84ae6bbb, 0x1ca081fe, 0x942b08f9);
637
&_data_word(0x58684870, 0x19fd458f, 0x876cde94, 0xb7f87b52);
638
&_data_word(0x23d373ab, 0xe2024b72, 0x578f1fe3, 0x2aab5566);
639
&_data_word(0x0728ebb2, 0x03c2b52f, 0x9a7bc586, 0xa50837d3);
640
&_data_word(0xf2872830, 0xb2a5bf23, 0xba6a0302, 0x5c8216ed);
641
&_data_word(0x2b1ccf8a, 0x92b479a7, 0xf0f207f3, 0xa1e2694e);
642
&_data_word(0xcdf4da65, 0xd5be0506, 0x1f6234d1, 0x8afea6c4);
643
&_data_word(0x9d532e34, 0xa055f3a2, 0x32e18a05, 0x75ebf6a4);
644
&_data_word(0x39ec830b, 0xaaef6040, 0x069f715e, 0x51106ebd);
645
&_data_word(0xf98a213e, 0x3d06dd96, 0xae053edd, 0x46bde64d);
646
&_data_word(0xb58d5491, 0x055dc471, 0x6fd40604, 0xff155060);
647
&_data_word(0x24fb9819, 0x97e9bdd6, 0xcc434089, 0x779ed967);
648
&_data_word(0xbd42e8b0, 0x888b8907, 0x385b19e7, 0xdbeec879);
649
&_data_word(0x470a7ca1, 0xe90f427c, 0xc91e84f8, 0x00000000);
650
&_data_word(0x83868009, 0x48ed2b32, 0xac70111e, 0x4e725a6c);
651
&_data_word(0xfbff0efd, 0x5638850f, 0x1ed5ae3d, 0x27392d36);
652
&_data_word(0x64d90f0a, 0x21a65c68, 0xd1545b9b, 0x3a2e3624);
653
&_data_word(0xb1670a0c, 0x0fe75793, 0xd296eeb4, 0x9e919b1b);
654
&_data_word(0x4fc5c080, 0xa220dc61, 0x694b775a, 0x161a121c);
655
&_data_word(0x0aba93e2, 0xe52aa0c0, 0x43e0223c, 0x1d171b12);
656
&_data_word(0x0b0d090e, 0xadc78bf2, 0xb9a8b62d, 0xc8a91e14);
657
&_data_word(0x8519f157, 0x4c0775af, 0xbbdd99ee, 0xfd607fa3);
658
&_data_word(0x9f2601f7, 0xbcf5725c, 0xc53b6644, 0x347efb5b);
659
&_data_word(0x7629438b, 0xdcc623cb, 0x68fcedb6, 0x63f1e4b8);
660
&_data_word(0xcadc31d7, 0x10856342, 0x40229713, 0x2011c684);
661
&_data_word(0x7d244a85, 0xf83dbbd2, 0x1132f9ae, 0x6da129c7);
662
&_data_word(0x4b2f9e1d, 0xf330b2dc, 0xec52860d, 0xd0e3c177);
663
&_data_word(0x6c16b32b, 0x99b970a9, 0xfa489411, 0x2264e947);
664
&_data_word(0xc48cfca8, 0x1a3ff0a0, 0xd82c7d56, 0xef903322);
665
&_data_word(0xc74e4987, 0xc1d138d9, 0xfea2ca8c, 0x360bd498);
666
&_data_word(0xcf81f5a6, 0x28de7aa5, 0x268eb7da, 0xa4bfad3f);
667
&_data_word(0xe49d3a2c, 0x0d927850, 0x9bcc5f6a, 0x62467e54);
668
&_data_word(0xc2138df6, 0xe8b8d890, 0x5ef7392e, 0xf5afc382);
669
&_data_word(0xbe805d9f, 0x7c93d069, 0xa92dd56f, 0xb31225cf);
670
&_data_word(0x3b99acc8, 0xa77d1810, 0x6e639ce8, 0x7bbb3bdb);
671
&_data_word(0x097826cd, 0xf418596e, 0x01b79aec, 0xa89a4f83);
672
&_data_word(0x656e95e6, 0x7ee6ffaa, 0x08cfbc21, 0xe6e815ef);
673
&_data_word(0xd99be7ba, 0xce366f4a, 0xd4099fea, 0xd67cb029);
674
&_data_word(0xafb2a431, 0x31233f2a, 0x3094a5c6, 0xc066a235);
675
&_data_word(0x37bc4e74, 0xa6ca82fc, 0xb0d090e0, 0x15d8a733);
676
&_data_word(0x4a9804f1, 0xf7daec41, 0x0e50cd7f, 0x2ff69117);
677
&_data_word(0x8dd64d76, 0x4db0ef43, 0x544daacc, 0xdf0496e4);
678
&_data_word(0xe3b5d19e, 0x1b886a4c, 0xb81f2cc1, 0x7f516546);
679
&_data_word(0x04ea5e9d, 0x5d358c01, 0x737487fa, 0x2e410bfb);
680
&_data_word(0x5a1d67b3, 0x52d2db92, 0x335610e9, 0x1347d66d);
681
&_data_word(0x8c61d79a, 0x7a0ca137, 0x8e14f859, 0x893c13eb);
682
&_data_word(0xee27a9ce, 0x35c961b7, 0xede51ce1, 0x3cb1477a);
683
&_data_word(0x59dfd29c, 0x3f73f255, 0x79ce1418, 0xbf37c773);
684
&_data_word(0xeacdf753, 0x5baafd5f, 0x146f3ddf, 0x86db4478);
685
&_data_word(0x81f3afca, 0x3ec468b9, 0x2c342438, 0x5f40a3c2);
686
&_data_word(0x72c31d16, 0x0c25e2bc, 0x8b493c28, 0x41950dff);
687
&_data_word(0x7101a839, 0xdeb30c08, 0x9ce4b4d8, 0x90c15664);
688
&_data_word(0x6184cb7b, 0x70b632d5, 0x745c6c48, 0x4257b8d0);
690
&data_word(0x52525252, 0x09090909, 0x6a6a6a6a, 0xd5d5d5d5);
691
&data_word(0x30303030, 0x36363636, 0xa5a5a5a5, 0x38383838);
692
&data_word(0xbfbfbfbf, 0x40404040, 0xa3a3a3a3, 0x9e9e9e9e);
693
&data_word(0x81818181, 0xf3f3f3f3, 0xd7d7d7d7, 0xfbfbfbfb);
694
&data_word(0x7c7c7c7c, 0xe3e3e3e3, 0x39393939, 0x82828282);
695
&data_word(0x9b9b9b9b, 0x2f2f2f2f, 0xffffffff, 0x87878787);
696
&data_word(0x34343434, 0x8e8e8e8e, 0x43434343, 0x44444444);
697
&data_word(0xc4c4c4c4, 0xdededede, 0xe9e9e9e9, 0xcbcbcbcb);
698
&data_word(0x54545454, 0x7b7b7b7b, 0x94949494, 0x32323232);
699
&data_word(0xa6a6a6a6, 0xc2c2c2c2, 0x23232323, 0x3d3d3d3d);
700
&data_word(0xeeeeeeee, 0x4c4c4c4c, 0x95959595, 0x0b0b0b0b);
701
&data_word(0x42424242, 0xfafafafa, 0xc3c3c3c3, 0x4e4e4e4e);
702
&data_word(0x08080808, 0x2e2e2e2e, 0xa1a1a1a1, 0x66666666);
703
&data_word(0x28282828, 0xd9d9d9d9, 0x24242424, 0xb2b2b2b2);
704
&data_word(0x76767676, 0x5b5b5b5b, 0xa2a2a2a2, 0x49494949);
705
&data_word(0x6d6d6d6d, 0x8b8b8b8b, 0xd1d1d1d1, 0x25252525);
706
&data_word(0x72727272, 0xf8f8f8f8, 0xf6f6f6f6, 0x64646464);
707
&data_word(0x86868686, 0x68686868, 0x98989898, 0x16161616);
708
&data_word(0xd4d4d4d4, 0xa4a4a4a4, 0x5c5c5c5c, 0xcccccccc);
709
&data_word(0x5d5d5d5d, 0x65656565, 0xb6b6b6b6, 0x92929292);
710
&data_word(0x6c6c6c6c, 0x70707070, 0x48484848, 0x50505050);
711
&data_word(0xfdfdfdfd, 0xedededed, 0xb9b9b9b9, 0xdadadada);
712
&data_word(0x5e5e5e5e, 0x15151515, 0x46464646, 0x57575757);
713
&data_word(0xa7a7a7a7, 0x8d8d8d8d, 0x9d9d9d9d, 0x84848484);
714
&data_word(0x90909090, 0xd8d8d8d8, 0xabababab, 0x00000000);
715
&data_word(0x8c8c8c8c, 0xbcbcbcbc, 0xd3d3d3d3, 0x0a0a0a0a);
716
&data_word(0xf7f7f7f7, 0xe4e4e4e4, 0x58585858, 0x05050505);
717
&data_word(0xb8b8b8b8, 0xb3b3b3b3, 0x45454545, 0x06060606);
718
&data_word(0xd0d0d0d0, 0x2c2c2c2c, 0x1e1e1e1e, 0x8f8f8f8f);
719
&data_word(0xcacacaca, 0x3f3f3f3f, 0x0f0f0f0f, 0x02020202);
720
&data_word(0xc1c1c1c1, 0xafafafaf, 0xbdbdbdbd, 0x03030303);
721
&data_word(0x01010101, 0x13131313, 0x8a8a8a8a, 0x6b6b6b6b);
722
&data_word(0x3a3a3a3a, 0x91919191, 0x11111111, 0x41414141);
723
&data_word(0x4f4f4f4f, 0x67676767, 0xdcdcdcdc, 0xeaeaeaea);
724
&data_word(0x97979797, 0xf2f2f2f2, 0xcfcfcfcf, 0xcececece);
725
&data_word(0xf0f0f0f0, 0xb4b4b4b4, 0xe6e6e6e6, 0x73737373);
726
&data_word(0x96969696, 0xacacacac, 0x74747474, 0x22222222);
727
&data_word(0xe7e7e7e7, 0xadadadad, 0x35353535, 0x85858585);
728
&data_word(0xe2e2e2e2, 0xf9f9f9f9, 0x37373737, 0xe8e8e8e8);
729
&data_word(0x1c1c1c1c, 0x75757575, 0xdfdfdfdf, 0x6e6e6e6e);
730
&data_word(0x47474747, 0xf1f1f1f1, 0x1a1a1a1a, 0x71717171);
731
&data_word(0x1d1d1d1d, 0x29292929, 0xc5c5c5c5, 0x89898989);
732
&data_word(0x6f6f6f6f, 0xb7b7b7b7, 0x62626262, 0x0e0e0e0e);
733
&data_word(0xaaaaaaaa, 0x18181818, 0xbebebebe, 0x1b1b1b1b);
734
&data_word(0xfcfcfcfc, 0x56565656, 0x3e3e3e3e, 0x4b4b4b4b);
735
&data_word(0xc6c6c6c6, 0xd2d2d2d2, 0x79797979, 0x20202020);
736
&data_word(0x9a9a9a9a, 0xdbdbdbdb, 0xc0c0c0c0, 0xfefefefe);
737
&data_word(0x78787878, 0xcdcdcdcd, 0x5a5a5a5a, 0xf4f4f4f4);
738
&data_word(0x1f1f1f1f, 0xdddddddd, 0xa8a8a8a8, 0x33333333);
739
&data_word(0x88888888, 0x07070707, 0xc7c7c7c7, 0x31313131);
740
&data_word(0xb1b1b1b1, 0x12121212, 0x10101010, 0x59595959);
741
&data_word(0x27272727, 0x80808080, 0xecececec, 0x5f5f5f5f);
742
&data_word(0x60606060, 0x51515151, 0x7f7f7f7f, 0xa9a9a9a9);
743
&data_word(0x19191919, 0xb5b5b5b5, 0x4a4a4a4a, 0x0d0d0d0d);
744
&data_word(0x2d2d2d2d, 0xe5e5e5e5, 0x7a7a7a7a, 0x9f9f9f9f);
745
&data_word(0x93939393, 0xc9c9c9c9, 0x9c9c9c9c, 0xefefefef);
746
&data_word(0xa0a0a0a0, 0xe0e0e0e0, 0x3b3b3b3b, 0x4d4d4d4d);
747
&data_word(0xaeaeaeae, 0x2a2a2a2a, 0xf5f5f5f5, 0xb0b0b0b0);
748
&data_word(0xc8c8c8c8, 0xebebebeb, 0xbbbbbbbb, 0x3c3c3c3c);
749
&data_word(0x83838383, 0x53535353, 0x99999999, 0x61616161);
750
&data_word(0x17171717, 0x2b2b2b2b, 0x04040404, 0x7e7e7e7e);
751
&data_word(0xbabababa, 0x77777777, 0xd6d6d6d6, 0x26262626);
752
&data_word(0xe1e1e1e1, 0x69696969, 0x14141414, 0x63636363);
753
&data_word(0x55555555, 0x21212121, 0x0c0c0c0c, 0x7d7d7d7d);
754
&function_end_B("_x86_AES_decrypt");
756
# void AES_decrypt (const void *inp,void *out,const AES_KEY *key);
757
&public_label("AES_Td");
758
&function_begin("AES_decrypt");
759
&mov ($acc,&wparam(0)); # load inp
760
&mov ($key,&wparam(2)); # load key
766
&mov (&DWP(16,"esp"),$s0);
768
&call (&label("pic_point")); # make it PIC!
769
&set_label("pic_point");
771
&lea ("ebp",&DWP(&label("AES_Td")."-".&label("pic_point"),"ebp"));
773
&mov ($s0,&DWP(0,$acc)); # load input data
774
&mov ($s1,&DWP(4,$acc));
775
&mov ($s2,&DWP(8,$acc));
776
&mov ($s3,&DWP(12,$acc));
778
&call ("_x86_AES_decrypt");
780
&mov ("esp",&DWP(16,"esp"));
782
&mov ($acc,&wparam(1)); # load out
783
&mov (&DWP(0,$acc),$s0); # write output data
784
&mov (&DWP(4,$acc),$s1);
785
&mov (&DWP(8,$acc),$s2);
786
&mov (&DWP(12,$acc),$s3);
787
&function_end("AES_decrypt");
789
# void AES_cbc_encrypt (const void char *inp, unsigned char *out,
790
# size_t length, const AES_KEY *key,
791
# unsigned char *ivp,const int enc);
794
# -4(%esp) 0(%esp) return address
795
# 0(%esp) 4(%esp) tmp1
796
# 4(%esp) 8(%esp) tmp2
797
# 8(%esp) 12(%esp) key
798
# 12(%esp) 16(%esp) end of key schedule
799
my $_esp=&DWP(16,"esp"); #saved %esp
800
my $_inp=&DWP(20,"esp"); #copy of wparam(0)
801
my $_out=&DWP(24,"esp"); #copy of wparam(1)
802
my $_len=&DWP(28,"esp"); #copy of wparam(2)
803
my $_key=&DWP(32,"esp"); #copy of wparam(3)
804
my $_ivp=&DWP(36,"esp"); #copy of wparam(4)
805
my $_tmp=&DWP(40,"esp"); #volatile variable
806
my $ivec=&DWP(44,"esp"); #ivec[16]
807
my $aes_key=&DWP(60,"esp"); #copy of aes_key
809
&public_label("AES_Te");
810
&public_label("AES_Td");
811
&function_begin("AES_cbc_encrypt");
812
&mov ($s2 eq "ecx"? $s2 : "",&wparam(2)); # load len
814
&je (&label("enc_out"));
816
&call (&label("pic_point")); # make it PIC!
817
&set_label("pic_point");
824
&je (&label("DECRYPT"));
826
&lea ("ebp",&DWP(&label("AES_Te")."-".&label("pic_point"),"ebp"));
828
# allocate aligned stack frame...
829
&lea ($key,&DWP(-64-244,"esp"));
832
# ... and make sure it doesn't alias with AES_Te modulo 4096
834
&lea ($s1,&DWP(2048,"ebp"));
836
&and ($s0,0xfff); # s = %ebp&0xfff
837
&and ($s1,0xfff); # e = (%ebp+2048)&0xfff
838
&and ($s3,0xfff); # p = %esp&0xfff
840
&cmp ($s3,$s1); # if (p>=e) %esp =- (p-e);
841
&jb (&label("te_break_out"));
844
&jmp (&label("te_ok"));
845
&set_label("te_break_out"); # else %esp -= (p-s)&0xfff + framesz;
853
&mov ($s0,&wparam(0)); # load inp
854
&mov ($s1,&wparam(1)); # load out
855
&mov ($s3,&wparam(3)); # load key
856
&mov ($acc,&wparam(4)); # load ivp
859
&add ("esp",4); # reserve for return address!
860
&mov ($_esp,$key); # save %esp
862
&mov ($_inp,$s0); # save copy of inp
863
&mov ($_out,$s1); # save copy of out
864
&mov ($_len,$s2); # save copy of len
865
&mov ($_key,$s3); # save copy of key
866
&mov ($_ivp,$acc); # save copy of ivp
869
&cmp ($s2,$compromise);
870
&jb (&label("skip_ecopy"));
872
# copy key schedule to stack
875
&lea ("edi",$aes_key);
878
&data_word(0xF689A5F3); # rep movsd
879
&set_label("skip_ecopy") if ($compromise);
884
&set_label("prefetch_te");
885
&mov ($s0,&DWP(0,"ebp"));
886
&mov ($s1,&DWP(32,"ebp"));
887
&mov ($s2,&DWP(64,"ebp"));
888
&mov ($s3,&DWP(96,"ebp"));
889
&lea ("ebp",&DWP(128,"ebp"));
891
&jnz (&label("prefetch_te"));
896
&test ($s2,0xFFFFFFF0);
897
&jz (&label("enc_tail")); # short input...
899
&mov ($s0,&DWP(0,$key)); # load iv
900
&mov ($s1,&DWP(4,$key));
903
&set_label("enc_loop");
904
&mov ($s2,&DWP(8,$key));
905
&mov ($s3,&DWP(12,$key));
907
&xor ($s0,&DWP(0,$acc)); # xor input data
908
&xor ($s1,&DWP(4,$acc));
909
&xor ($s2,&DWP(8,$acc));
910
&xor ($s3,&DWP(12,$acc));
912
&mov ($key,$_key); # load key
913
&call ("_x86_AES_encrypt");
915
&mov ($acc,$_inp); # load inp
916
&mov ($key,$_out); # load out
918
&mov (&DWP(0,$key),$s0); # save output data
919
&mov (&DWP(4,$key),$s1);
920
&mov (&DWP(8,$key),$s2);
921
&mov (&DWP(12,$key),$s3);
923
&mov ($s2,$_len); # load len
925
&lea ($acc,&DWP(16,$acc));
926
&mov ($_inp,$acc); # save inp
928
&lea ($s3,&DWP(16,$key));
929
&mov ($_out,$s3); # save out
932
&test ($s2,0xFFFFFFF0);
933
&mov ($_len,$s2); # save len
934
&jnz (&label("enc_loop"));
936
&jnz (&label("enc_tail"));
937
&mov ($acc,$_ivp); # load ivp
938
&mov ($s2,&DWP(8,$key)); # restore last dwords
939
&mov ($s3,&DWP(12,$key));
940
&mov (&DWP(0,$acc),$s0); # save ivec
941
&mov (&DWP(4,$acc),$s1);
942
&mov (&DWP(8,$acc),$s2);
943
&mov (&DWP(12,$acc),$s3);
948
&cmp (&wparam(2),$compromise);
949
&jb (&label("skip_ezero"));
951
# zero copy of key schedule
955
&data_word(0xF689ABF3); # rep stosd
956
&set_label("skip_ezero") if ($compromise);
958
&set_label("enc_out");
960
&pushf (); # kludge, never executed
963
&set_label("enc_tail");
964
&push ($key eq "edi" ? $key : ""); # push ivp
965
&mov ($key,$_out); # load out
968
&cmp ($key,$acc); # compare with inp
969
&je (&label("enc_in_place"));
971
&data_word(0xF689A4F3); # rep movsb # copy input
972
&jmp (&label("enc_skip_in_place"));
973
&set_label("enc_in_place");
974
&lea ($key,&DWP(0,$key,$s2));
975
&set_label("enc_skip_in_place");
979
&data_word(0xF689AAF3); # rep stosb # zero tail
980
&pop ($key); # pop ivp
982
&mov ($acc,$_out); # output as input
983
&mov ($s0,&DWP(0,$key));
984
&mov ($s1,&DWP(4,$key));
985
&mov ($_len,16); # len=16
986
&jmp (&label("enc_loop")); # one more spin...
988
#----------------------------- DECRYPT -----------------------------#
990
&set_label("DECRYPT");
991
&lea ("ebp",&DWP(&label("AES_Td")."-".&label("pic_point"),"ebp"));
993
# allocate aligned stack frame...
994
&lea ($key,&DWP(-64-244,"esp"));
997
# ... and make sure it doesn't alias with AES_Td modulo 4096
999
&lea ($s1,&DWP(3072,"ebp"));
1001
&and ($s0,0xfff); # s = %ebp&0xfff
1002
&and ($s1,0xfff); # e = (%ebp+3072)&0xfff
1003
&and ($s3,0xfff); # p = %esp&0xfff
1005
&cmp ($s3,$s1); # if (p>=e) %esp =- (p-e);
1006
&jb (&label("td_break_out"));
1009
&jmp (&label("td_ok"));
1010
&set_label("td_break_out"); # else %esp -= (p-s)&0xfff + framesz;
1016
&set_label("td_ok");
1018
&mov ($s0,&wparam(0)); # load inp
1019
&mov ($s1,&wparam(1)); # load out
1020
&mov ($s3,&wparam(3)); # load key
1021
&mov ($acc,&wparam(4)); # load ivp
1024
&add ("esp",4); # reserve for return address!
1025
&mov ($_esp,$key); # save %esp
1027
&mov ($_inp,$s0); # save copy of inp
1028
&mov ($_out,$s1); # save copy of out
1029
&mov ($_len,$s2); # save copy of len
1030
&mov ($_key,$s3); # save copy of key
1031
&mov ($_ivp,$acc); # save copy of ivp
1034
&cmp ($s2,$compromise);
1035
&jb (&label("skip_dcopy"));
1037
# copy key schedule to stack
1040
&lea ("edi",$aes_key);
1043
&data_word(0xF689A5F3); # rep movsd
1044
&set_label("skip_dcopy") if ($compromise);
1049
&set_label("prefetch_td");
1050
&mov ($s0,&DWP(0,"ebp"));
1051
&mov ($s1,&DWP(32,"ebp"));
1052
&mov ($s2,&DWP(64,"ebp"));
1053
&mov ($s3,&DWP(96,"ebp"));
1054
&lea ("ebp",&DWP(128,"ebp"));
1056
&jnz (&label("prefetch_td"));
1060
&je (&label("dec_in_place")); # in-place processing...
1062
&mov ($key,$_ivp); # load ivp
1066
&set_label("dec_loop");
1067
&mov ($s0,&DWP(0,$acc)); # read input
1068
&mov ($s1,&DWP(4,$acc));
1069
&mov ($s2,&DWP(8,$acc));
1070
&mov ($s3,&DWP(12,$acc));
1072
&mov ($key,$_key); # load key
1073
&call ("_x86_AES_decrypt");
1075
&mov ($key,$_tmp); # load ivp
1076
&mov ($acc,$_len); # load len
1077
&xor ($s0,&DWP(0,$key)); # xor iv
1078
&xor ($s1,&DWP(4,$key));
1079
&xor ($s2,&DWP(8,$key));
1080
&xor ($s3,&DWP(12,$key));
1083
&jc (&label("dec_partial"));
1084
&mov ($_len,$acc); # save len
1085
&mov ($acc,$_inp); # load inp
1086
&mov ($key,$_out); # load out
1088
&mov (&DWP(0,$key),$s0); # write output
1089
&mov (&DWP(4,$key),$s1);
1090
&mov (&DWP(8,$key),$s2);
1091
&mov (&DWP(12,$key),$s3);
1093
&mov ($_tmp,$acc); # save ivp
1094
&lea ($acc,&DWP(16,$acc));
1095
&mov ($_inp,$acc); # save inp
1097
&lea ($key,&DWP(16,$key));
1098
&mov ($_out,$key); # save out
1100
&jnz (&label("dec_loop"));
1101
&mov ($key,$_tmp); # load temp ivp
1102
&set_label("dec_end");
1103
&mov ($acc,$_ivp); # load user ivp
1104
&mov ($s0,&DWP(0,$key)); # load iv
1105
&mov ($s1,&DWP(4,$key));
1106
&mov ($s2,&DWP(8,$key));
1107
&mov ($s3,&DWP(12,$key));
1108
&mov (&DWP(0,$acc),$s0); # copy back to user
1109
&mov (&DWP(4,$acc),$s1);
1110
&mov (&DWP(8,$acc),$s2);
1111
&mov (&DWP(12,$acc),$s3);
1112
&jmp (&label("dec_out"));
1115
&set_label("dec_partial");
1117
&mov (&DWP(0,$key),$s0); # dump output to stack
1118
&mov (&DWP(4,$key),$s1);
1119
&mov (&DWP(8,$key),$s2);
1120
&mov (&DWP(12,$key),$s3);
1121
&lea ($s2 eq "ecx" ? $s2 : "",&DWP(16,$acc));
1122
&mov ($acc eq "esi" ? $acc : "",$key);
1123
&mov ($key eq "edi" ? $key : "",$_out); # load out
1124
&data_word(0xF689A4F3); # rep movsb # copy output
1125
&mov ($key,$_inp); # use inp as temp ivp
1126
&jmp (&label("dec_end"));
1129
&set_label("dec_in_place");
1130
&set_label("dec_in_place_loop");
1132
&mov ($s0,&DWP(0,$acc)); # read input
1133
&mov ($s1,&DWP(4,$acc));
1134
&mov ($s2,&DWP(8,$acc));
1135
&mov ($s3,&DWP(12,$acc));
1137
&mov (&DWP(0,$key),$s0); # copy to temp
1138
&mov (&DWP(4,$key),$s1);
1139
&mov (&DWP(8,$key),$s2);
1140
&mov (&DWP(12,$key),$s3);
1142
&mov ($key,$_key); # load key
1143
&call ("_x86_AES_decrypt");
1145
&mov ($key,$_ivp); # load ivp
1146
&mov ($acc,$_out); # load out
1147
&xor ($s0,&DWP(0,$key)); # xor iv
1148
&xor ($s1,&DWP(4,$key));
1149
&xor ($s2,&DWP(8,$key));
1150
&xor ($s3,&DWP(12,$key));
1152
&mov (&DWP(0,$acc),$s0); # write output
1153
&mov (&DWP(4,$acc),$s1);
1154
&mov (&DWP(8,$acc),$s2);
1155
&mov (&DWP(12,$acc),$s3);
1157
&lea ($acc,&DWP(16,$acc));
1158
&mov ($_out,$acc); # save out
1161
&mov ($s0,&DWP(0,$acc)); # read temp
1162
&mov ($s1,&DWP(4,$acc));
1163
&mov ($s2,&DWP(8,$acc));
1164
&mov ($s3,&DWP(12,$acc));
1166
&mov (&DWP(0,$key),$s0); # copy iv
1167
&mov (&DWP(4,$key),$s1);
1168
&mov (&DWP(8,$key),$s2);
1169
&mov (&DWP(12,$key),$s3);
1171
&mov ($acc,$_inp); # load inp
1173
&lea ($acc,&DWP(16,$acc));
1174
&mov ($_inp,$acc); # save inp
1176
&mov ($s2,$_len); # load len
1178
&jc (&label("dec_in_place_partial"));
1179
&mov ($_len,$s2); # save len
1180
&jnz (&label("dec_in_place_loop"));
1181
&jmp (&label("dec_out"));
1184
&set_label("dec_in_place_partial");
1185
# one can argue if this is actually required...
1186
&mov ($key eq "edi" ? $key : "",$_out);
1187
&lea ($acc eq "esi" ? $acc : "",$ivec);
1188
&lea ($key,&DWP(0,$key,$s2));
1189
&lea ($acc,&DWP(16,$acc,$s2));
1190
&neg ($s2 eq "ecx" ? $s2 : "");
1191
&data_word(0xF689A4F3); # rep movsb # restore tail
1194
&set_label("dec_out");
1198
&cmp (&wparam(2),$compromise);
1199
&jb (&label("skip_dzero"));
1201
# zero copy of key schedule
1205
&data_word(0xF689ABF3); # rep stosd
1206
&set_label("skip_dzero") if ($compromise);
1208
&function_end("AES_cbc_encrypt");
1211
#------------------------------------------------------------------#
1215
&movz ("esi",&LB("edx")); # rk[i]>>0
1216
&mov ("ebx",&DWP(2,"ebp","esi",8));
1217
&movz ("esi",&HB("edx")); # rk[i]>>8
1218
&and ("ebx",0xFF000000);
1221
&mov ("ebx",&DWP(2,"ebp","esi",8));
1223
&and ("ebx",0x000000FF);
1224
&movz ("esi",&LB("edx")); # rk[i]>>16
1227
&mov ("ebx",&DWP(0,"ebp","esi",8));
1228
&movz ("esi",&HB("edx")); # rk[i]>>24
1229
&and ("ebx",0x0000FF00);
1232
&mov ("ebx",&DWP(0,"ebp","esi",8));
1233
&and ("ebx",0x00FF0000);
1236
&xor ("eax",&DWP(2048,"ebp","ecx",4)); # rcon
1239
# int AES_set_encrypt_key(const unsigned char *userKey, const int bits,
1241
&public_label("AES_Te");
1242
&function_begin("AES_set_encrypt_key");
1243
&mov ("esi",&wparam(0)); # user supplied key
1244
&mov ("edi",&wparam(2)); # private key schedule
1247
&jz (&label("badpointer"));
1249
&jz (&label("badpointer"));
1251
&call (&label("pic_point"));
1252
&set_label("pic_point");
1254
&lea ("ebp",&DWP(&label("AES_Te")."-".&label("pic_point"),"ebp"));
1256
&mov ("ecx",&wparam(1)); # number of bits in key
1258
&je (&label("10rounds"));
1260
&je (&label("12rounds"));
1262
&je (&label("14rounds"));
1263
&mov ("eax",-2); # invalid number of bits
1264
&jmp (&label("exit"));
1266
&set_label("10rounds");
1267
&mov ("eax",&DWP(0,"esi")); # copy first 4 dwords
1268
&mov ("ebx",&DWP(4,"esi"));
1269
&mov ("ecx",&DWP(8,"esi"));
1270
&mov ("edx",&DWP(12,"esi"));
1271
&mov (&DWP(0,"edi"),"eax");
1272
&mov (&DWP(4,"edi"),"ebx");
1273
&mov (&DWP(8,"edi"),"ecx");
1274
&mov (&DWP(12,"edi"),"edx");
1277
&jmp (&label("10shortcut"));
1280
&set_label("10loop");
1281
&mov ("eax",&DWP(0,"edi")); # rk[0]
1282
&mov ("edx",&DWP(12,"edi")); # rk[3]
1283
&set_label("10shortcut");
1286
&mov (&DWP(16,"edi"),"eax"); # rk[4]
1287
&xor ("eax",&DWP(4,"edi"));
1288
&mov (&DWP(20,"edi"),"eax"); # rk[5]
1289
&xor ("eax",&DWP(8,"edi"));
1290
&mov (&DWP(24,"edi"),"eax"); # rk[6]
1291
&xor ("eax",&DWP(12,"edi"));
1292
&mov (&DWP(28,"edi"),"eax"); # rk[7]
1296
&jl (&label("10loop"));
1298
&mov (&DWP(80,"edi"),10); # setup number of rounds
1300
&jmp (&label("exit"));
1302
&set_label("12rounds");
1303
&mov ("eax",&DWP(0,"esi")); # copy first 6 dwords
1304
&mov ("ebx",&DWP(4,"esi"));
1305
&mov ("ecx",&DWP(8,"esi"));
1306
&mov ("edx",&DWP(12,"esi"));
1307
&mov (&DWP(0,"edi"),"eax");
1308
&mov (&DWP(4,"edi"),"ebx");
1309
&mov (&DWP(8,"edi"),"ecx");
1310
&mov (&DWP(12,"edi"),"edx");
1311
&mov ("ecx",&DWP(16,"esi"));
1312
&mov ("edx",&DWP(20,"esi"));
1313
&mov (&DWP(16,"edi"),"ecx");
1314
&mov (&DWP(20,"edi"),"edx");
1317
&jmp (&label("12shortcut"));
1320
&set_label("12loop");
1321
&mov ("eax",&DWP(0,"edi")); # rk[0]
1322
&mov ("edx",&DWP(20,"edi")); # rk[5]
1323
&set_label("12shortcut");
1326
&mov (&DWP(24,"edi"),"eax"); # rk[6]
1327
&xor ("eax",&DWP(4,"edi"));
1328
&mov (&DWP(28,"edi"),"eax"); # rk[7]
1329
&xor ("eax",&DWP(8,"edi"));
1330
&mov (&DWP(32,"edi"),"eax"); # rk[8]
1331
&xor ("eax",&DWP(12,"edi"));
1332
&mov (&DWP(36,"edi"),"eax"); # rk[9]
1335
&je (&label("12break"));
1338
&xor ("eax",&DWP(16,"edi"));
1339
&mov (&DWP(40,"edi"),"eax"); # rk[10]
1340
&xor ("eax",&DWP(20,"edi"));
1341
&mov (&DWP(44,"edi"),"eax"); # rk[11]
1344
&jmp (&label("12loop"));
1346
&set_label("12break");
1347
&mov (&DWP(72,"edi"),12); # setup number of rounds
1349
&jmp (&label("exit"));
1351
&set_label("14rounds");
1352
&mov ("eax",&DWP(0,"esi")); # copy first 8 dwords
1353
&mov ("ebx",&DWP(4,"esi"));
1354
&mov ("ecx",&DWP(8,"esi"));
1355
&mov ("edx",&DWP(12,"esi"));
1356
&mov (&DWP(0,"edi"),"eax");
1357
&mov (&DWP(4,"edi"),"ebx");
1358
&mov (&DWP(8,"edi"),"ecx");
1359
&mov (&DWP(12,"edi"),"edx");
1360
&mov ("eax",&DWP(16,"esi"));
1361
&mov ("ebx",&DWP(20,"esi"));
1362
&mov ("ecx",&DWP(24,"esi"));
1363
&mov ("edx",&DWP(28,"esi"));
1364
&mov (&DWP(16,"edi"),"eax");
1365
&mov (&DWP(20,"edi"),"ebx");
1366
&mov (&DWP(24,"edi"),"ecx");
1367
&mov (&DWP(28,"edi"),"edx");
1370
&jmp (&label("14shortcut"));
1373
&set_label("14loop");
1374
&mov ("edx",&DWP(28,"edi")); # rk[7]
1375
&set_label("14shortcut");
1376
&mov ("eax",&DWP(0,"edi")); # rk[0]
1380
&mov (&DWP(32,"edi"),"eax"); # rk[8]
1381
&xor ("eax",&DWP(4,"edi"));
1382
&mov (&DWP(36,"edi"),"eax"); # rk[9]
1383
&xor ("eax",&DWP(8,"edi"));
1384
&mov (&DWP(40,"edi"),"eax"); # rk[10]
1385
&xor ("eax",&DWP(12,"edi"));
1386
&mov (&DWP(44,"edi"),"eax"); # rk[11]
1389
&je (&label("14break"));
1393
&mov ("eax",&DWP(16,"edi")); # rk[4]
1394
&movz ("esi",&LB("edx")); # rk[11]>>0
1395
&mov ("ebx",&DWP(2,"ebp","esi",8));
1396
&movz ("esi",&HB("edx")); # rk[11]>>8
1397
&and ("ebx",0x000000FF);
1400
&mov ("ebx",&DWP(0,"ebp","esi",8));
1402
&and ("ebx",0x0000FF00);
1403
&movz ("esi",&LB("edx")); # rk[11]>>16
1406
&mov ("ebx",&DWP(0,"ebp","esi",8));
1407
&movz ("esi",&HB("edx")); # rk[11]>>24
1408
&and ("ebx",0x00FF0000);
1411
&mov ("ebx",&DWP(2,"ebp","esi",8));
1412
&and ("ebx",0xFF000000);
1415
&mov (&DWP(48,"edi"),"eax"); # rk[12]
1416
&xor ("eax",&DWP(20,"edi"));
1417
&mov (&DWP(52,"edi"),"eax"); # rk[13]
1418
&xor ("eax",&DWP(24,"edi"));
1419
&mov (&DWP(56,"edi"),"eax"); # rk[14]
1420
&xor ("eax",&DWP(28,"edi"));
1421
&mov (&DWP(60,"edi"),"eax"); # rk[15]
1424
&jmp (&label("14loop"));
1426
&set_label("14break");
1427
&mov (&DWP(48,"edi"),14); # setup number of rounds
1429
&jmp (&label("exit"));
1431
&set_label("badpointer");
1434
&function_end("AES_set_encrypt_key");
1437
{ my ($i,$ptr,$te,$td) = @_;
1439
&mov ("eax",&DWP($i,$ptr));
1441
&movz ("ebx",&HB("eax"));
1444
&movz ("eax",&BP(2,$te,"eax",8));
1445
&movz ("ebx",&BP(2,$te,"ebx",8));
1446
&mov ("eax",&DWP(0,$td,"eax",8));
1447
&xor ("eax",&DWP(3,$td,"ebx",8));
1448
&movz ("ebx",&HB("edx"));
1450
&movz ("edx",&BP(2,$te,"edx",8));
1451
&movz ("ebx",&BP(2,$te,"ebx",8));
1452
&xor ("eax",&DWP(2,$td,"edx",8));
1453
&xor ("eax",&DWP(1,$td,"ebx",8));
1454
&mov (&DWP($i,$ptr),"eax");
1457
# int AES_set_decrypt_key(const unsigned char *userKey, const int bits,
1459
&public_label("AES_Td");
1460
&public_label("AES_Te");
1461
&function_begin_B("AES_set_decrypt_key");
1462
&mov ("eax",&wparam(0));
1463
&mov ("ecx",&wparam(1));
1464
&mov ("edx",&wparam(2));
1466
&mov (&DWP(0,"esp"),"eax");
1467
&mov (&DWP(4,"esp"),"ecx");
1468
&mov (&DWP(8,"esp"),"edx");
1469
&call ("AES_set_encrypt_key");
1472
&je (&label("proceed"));
1475
&set_label("proceed");
1481
&mov ("esi",&wparam(2));
1482
&mov ("ecx",&DWP(240,"esi")); # pull number of rounds
1483
&lea ("ecx",&DWP(0,"","ecx",4));
1484
&lea ("edi",&DWP(0,"esi","ecx",4)); # pointer to last chunk
1487
&set_label("invert"); # invert order of chunks
1488
&mov ("eax",&DWP(0,"esi"));
1489
&mov ("ebx",&DWP(4,"esi"));
1490
&mov ("ecx",&DWP(0,"edi"));
1491
&mov ("edx",&DWP(4,"edi"));
1492
&mov (&DWP(0,"edi"),"eax");
1493
&mov (&DWP(4,"edi"),"ebx");
1494
&mov (&DWP(0,"esi"),"ecx");
1495
&mov (&DWP(4,"esi"),"edx");
1496
&mov ("eax",&DWP(8,"esi"));
1497
&mov ("ebx",&DWP(12,"esi"));
1498
&mov ("ecx",&DWP(8,"edi"));
1499
&mov ("edx",&DWP(12,"edi"));
1500
&mov (&DWP(8,"edi"),"eax");
1501
&mov (&DWP(12,"edi"),"ebx");
1502
&mov (&DWP(8,"esi"),"ecx");
1503
&mov (&DWP(12,"esi"),"edx");
1507
&jne (&label("invert"));
1509
&call (&label("pic_point"));
1510
&set_label("pic_point");
1512
&lea ("edi",&DWP(&label("AES_Td")."-".&label("pic_point"),"ebp"));
1513
&lea ("ebp",&DWP(&label("AES_Te")."-".&label("pic_point"),"ebp"));
1515
&mov ("esi",&wparam(2));
1516
&mov ("ecx",&DWP(240,"esi")); # pull number of rounds
1519
&set_label("permute"); # permute the key schedule
1521
&deckey (0,"esi","ebp","edi");
1522
&deckey (4,"esi","ebp","edi");
1523
&deckey (8,"esi","ebp","edi");
1524
&deckey (12,"esi","ebp","edi");
1526
&jnz (&label("permute"));
1528
&xor ("eax","eax"); # return success
1529
&function_end("AES_set_decrypt_key");
added
removed
crypto/aes/asm/aes-586.pl
