#!/usr/local/bin/perl
# Normal is the
# md5_block_x86(MD5_CTX *c, ULONG *X);
# version, non-normal is the
# md5_block_x86(MD5_CTX *c, ULONG *X,int blocks);
$normal=0;
push(@INC,"perlasm","../../perlasm");
require "x86asm.pl";
&asm_init($ARGV[0],$0);
$A="eax";
$B="ebx";
$C="ecx";
$D="edx";
$tmp1="edi";
$tmp2="ebp";
$X="esi";
# What we need to load into $tmp for the next round
%Ltmp1=("R0",&Np($C), "R1",&Np($C), "R2",&Np($C), "R3",&Np($D));
@xo=(
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, # R0
1, 6, 11, 0, 5, 10, 15, 4, 9, 14, 3, 8, 13, 2, 7, 12, # R1
5, 8, 11, 14, 1, 4, 7, 10, 13, 0, 3, 6, 9, 12, 15, 2, # R2
0, 7, 14, 5, 12, 3, 10, 1, 8, 15, 6, 13, 4, 11, 2, 9, # R3
);
&md5_block("md5_block_asm_data_order");
&asm_finish();
sub Np
{
local($p)=@_;
local(%n)=($A,$D,$B,$A,$C,$B,$D,$C);
return($n{$p});
}
sub R0
{
local($pos,$a,$b,$c,$d,$K,$ki,$s,$t)=@_;
&mov($tmp1,$C) if $pos < 0;
&mov($tmp2,&DWP($xo[$ki]*4,$K,"",0)) if $pos < 0; # very first one
# body proper
&comment("R0 $ki");
&xor($tmp1,$d); # F function - part 2
&and($tmp1,$b); # F function - part 3
&lea($a,&DWP($t,$a,$tmp2,1));
&xor($tmp1,$d); # F function - part 4
&add($a,$tmp1);
&mov($tmp1,&Np($c)) if $pos < 1; # next tmp1 for R0
&mov($tmp1,&Np($c)) if $pos == 1; # next tmp1 for R1
&rotl($a,$s);
&mov($tmp2,&DWP($xo[$ki+1]*4,$K,"",0)) if ($pos != 2);
&add($a,$b);
}
sub R1
{
local($pos,$a,$b,$c,$d,$K,$ki,$s,$t)=@_;
&comment("R1 $ki");
&lea($a,&DWP($t,$a,$tmp2,1));
&xor($tmp1,$b); # G function - part 2
&and($tmp1,$d); # G function - part 3
&mov($tmp2,&DWP($xo[$ki+1]*4,$K,"",0)) if ($pos != 2);
&xor($tmp1,$c); # G function - part 4
&add($a,$tmp1);
&mov($tmp1,&Np($c)) if $pos < 1; # G function - part 1
&mov($tmp1,&Np($c)) if $pos == 1; # G function - part 1
&rotl($a,$s);
&add($a,$b);
}
sub R2
{
local($n,$pos,$a,$b,$c,$d,$K,$ki,$s,$t)=@_;
# This one is different, only 3 logical operations
if (($n & 1) == 0)
{
&comment("R2 $ki");
# make sure to do 'D' first, not 'B', else we clash with
# the last add from the previous round.
&xor($tmp1,$d); # H function - part 2
&xor($tmp1,$b); # H function - part 3
&lea($a,&DWP($t,$a,$tmp2,1));
&add($a,$tmp1);
&rotl($a,$s);
&mov($tmp2,&DWP($xo[$ki+1]*4,$K,"",0));
&mov($tmp1,&Np($c));
}
else
{
&comment("R2 $ki");
# make sure to do 'D' first, not 'B', else we clash with
# the last add from the previous round.
&lea($a,&DWP($t,$a,$tmp2,1));
&add($b,$c); # MOVED FORWARD
&xor($tmp1,$d); # H function - part 2
&xor($tmp1,$b); # H function - part 3
&mov($tmp2,&DWP($xo[$ki+1]*4,$K,"",0)) if ($pos != 2);
&add($a,$tmp1);
&mov($tmp1,&Np($c)) if $pos < 1; # H function - part 1
&mov($tmp1,-1) if $pos == 1; # I function - part 1
&rotl($a,$s);
&add($a,$b);
}
}
sub R3
{
local($pos,$a,$b,$c,$d,$K,$ki,$s,$t)=@_;
&comment("R3 $ki");
# ¬($tmp1)
&xor($tmp1,$d) if $pos < 0; # I function - part 2
&or($tmp1,$b); # I function - part 3
&lea($a,&DWP($t,$a,$tmp2,1));
&xor($tmp1,$c); # I function - part 4
&mov($tmp2,&DWP($xo[$ki+1]*4,$K,"",0)) if $pos != 2; # load X/k value
&mov($tmp2,&wparam(0)) if $pos == 2;
&add($a,$tmp1);
&mov($tmp1,-1) if $pos < 1; # H function - part 1
&add($K,64) if $pos >=1 && !$normal;
&rotl($a,$s);
&xor($tmp1,&Np($d)) if $pos <= 0; # I function - part = first time
&mov($tmp1,&DWP( 0,$tmp2,"",0)) if $pos > 0;
&add($a,$b);
}
sub md5_block
{
local($name)=@_;
&function_begin_B($name,"",3);
# parameter 1 is the MD5_CTX structure.
# A 0
# B 4
# C 8
# D 12
&push("esi");
&push("edi");
&mov($tmp1, &wparam(0)); # edi
&mov($X, &wparam(1)); # esi
&mov($C, &wparam(2));
&push("ebp");
&shl($C, 6);
&push("ebx");
&add($C, $X); # offset we end at
&sub($C, 64);
&mov($A, &DWP( 0,$tmp1,"",0));
&push($C); # Put on the TOS
&mov($B, &DWP( 4,$tmp1,"",0));
&mov($C, &DWP( 8,$tmp1,"",0));
&mov($D, &DWP(12,$tmp1,"",0));
&set_label("start") unless $normal;
&comment("");
&comment("R0 section");
&R0(-2,$A,$B,$C,$D,$X, 0, 7,0xd76aa478);
&R0( 0,$D,$A,$B,$C,$X, 1,12,0xe8c7b756);
&R0( 0,$C,$D,$A,$B,$X, 2,17,0x242070db);
&R0( 0,$B,$C,$D,$A,$X, 3,22,0xc1bdceee);
&R0( 0,$A,$B,$C,$D,$X, 4, 7,0xf57c0faf);
&R0( 0,$D,$A,$B,$C,$X, 5,12,0x4787c62a);
&R0( 0,$C,$D,$A,$B,$X, 6,17,0xa8304613);
&R0( 0,$B,$C,$D,$A,$X, 7,22,0xfd469501);
&R0( 0,$A,$B,$C,$D,$X, 8, 7,0x698098d8);
&R0( 0,$D,$A,$B,$C,$X, 9,12,0x8b44f7af);
&R0( 0,$C,$D,$A,$B,$X,10,17,0xffff5bb1);
&R0( 0,$B,$C,$D,$A,$X,11,22,0x895cd7be);
&R0( 0,$A,$B,$C,$D,$X,12, 7,0x6b901122);
&R0( 0,$D,$A,$B,$C,$X,13,12,0xfd987193);
&R0( 0,$C,$D,$A,$B,$X,14,17,0xa679438e);
&R0( 1,$B,$C,$D,$A,$X,15,22,0x49b40821);
&comment("");
&comment("R1 section");
&R1(-1,$A,$B,$C,$D,$X,16, 5,0xf61e2562);
&R1( 0,$D,$A,$B,$C,$X,17, 9,0xc040b340);
&R1( 0,$C,$D,$A,$B,$X,18,14,0x265e5a51);
&R1( 0,$B,$C,$D,$A,$X,19,20,0xe9b6c7aa);
&R1( 0,$A,$B,$C,$D,$X,20, 5,0xd62f105d);
&R1( 0,$D,$A,$B,$C,$X,21, 9,0x02441453);
&R1( 0,$C,$D,$A,$B,$X,22,14,0xd8a1e681);
&R1( 0,$B,$C,$D,$A,$X,23,20,0xe7d3fbc8);
&R1( 0,$A,$B,$C,$D,$X,24, 5,0x21e1cde6);
&R1( 0,$D,$A,$B,$C,$X,25, 9,0xc33707d6);
&R1( 0,$C,$D,$A,$B,$X,26,14,0xf4d50d87);
&R1( 0,$B,$C,$D,$A,$X,27,20,0x455a14ed);
&R1( 0,$A,$B,$C,$D,$X,28, 5,0xa9e3e905);
&R1( 0,$D,$A,$B,$C,$X,29, 9,0xfcefa3f8);
&R1( 0,$C,$D,$A,$B,$X,30,14,0x676f02d9);
&R1( 1,$B,$C,$D,$A,$X,31,20,0x8d2a4c8a);
&comment("");
&comment("R2 section");
&R2( 0,-1,$A,$B,$C,$D,$X,32, 4,0xfffa3942);
&R2( 1, 0,$D,$A,$B,$C,$X,33,11,0x8771f681);
&R2( 2, 0,$C,$D,$A,$B,$X,34,16,0x6d9d6122);
&R2( 3, 0,$B,$C,$D,$A,$X,35,23,0xfde5380c);
&R2( 4, 0,$A,$B,$C,$D,$X,36, 4,0xa4beea44);
&R2( 5, 0,$D,$A,$B,$C,$X,37,11,0x4bdecfa9);
&R2( 6, 0,$C,$D,$A,$B,$X,38,16,0xf6bb4b60);
&R2( 7, 0,$B,$C,$D,$A,$X,39,23,0xbebfbc70);
&R2( 8, 0,$A,$B,$C,$D,$X,40, 4,0x289b7ec6);
&R2( 9, 0,$D,$A,$B,$C,$X,41,11,0xeaa127fa);
&R2(10, 0,$C,$D,$A,$B,$X,42,16,0xd4ef3085);
&R2(11, 0,$B,$C,$D,$A,$X,43,23,0x04881d05);
&R2(12, 0,$A,$B,$C,$D,$X,44, 4,0xd9d4d039);
&R2(13, 0,$D,$A,$B,$C,$X,45,11,0xe6db99e5);
&R2(14, 0,$C,$D,$A,$B,$X,46,16,0x1fa27cf8);
&R2(15, 1,$B,$C,$D,$A,$X,47,23,0xc4ac5665);
&comment("");
&comment("R3 section");
&R3(-1,$A,$B,$C,$D,$X,48, 6,0xf4292244);
&R3( 0,$D,$A,$B,$C,$X,49,10,0x432aff97);
&R3( 0,$C,$D,$A,$B,$X,50,15,0xab9423a7);
&R3( 0,$B,$C,$D,$A,$X,51,21,0xfc93a039);
&R3( 0,$A,$B,$C,$D,$X,52, 6,0x655b59c3);
&R3( 0,$D,$A,$B,$C,$X,53,10,0x8f0ccc92);
&R3( 0,$C,$D,$A,$B,$X,54,15,0xffeff47d);
&R3( 0,$B,$C,$D,$A,$X,55,21,0x85845dd1);
&R3( 0,$A,$B,$C,$D,$X,56, 6,0x6fa87e4f);
&R3( 0,$D,$A,$B,$C,$X,57,10,0xfe2ce6e0);
&R3( 0,$C,$D,$A,$B,$X,58,15,0xa3014314);
&R3( 0,$B,$C,$D,$A,$X,59,21,0x4e0811a1);
&R3( 0,$A,$B,$C,$D,$X,60, 6,0xf7537e82);
&R3( 0,$D,$A,$B,$C,$X,61,10,0xbd3af235);
&R3( 0,$C,$D,$A,$B,$X,62,15,0x2ad7d2bb);
&R3( 2,$B,$C,$D,$A,$X,63,21,0xeb86d391);
# &mov($tmp2,&wparam(0)); # done in the last R3
# &mov($tmp1, &DWP( 0,$tmp2,"",0)); # done is the last R3
&add($A,$tmp1);
&mov($tmp1, &DWP( 4,$tmp2,"",0));
&add($B,$tmp1);
&mov($tmp1, &DWP( 8,$tmp2,"",0));
&add($C,$tmp1);
&mov($tmp1, &DWP(12,$tmp2,"",0));
&add($D,$tmp1);
&mov(&DWP( 0,$tmp2,"",0),$A);
&mov(&DWP( 4,$tmp2,"",0),$B);
&mov($tmp1,&swtmp(0)) unless $normal;
&mov(&DWP( 8,$tmp2,"",0),$C);
&mov(&DWP(12,$tmp2,"",0),$D);
&cmp($tmp1,$X) unless $normal; # check count
&jae(&label("start")) unless $normal;
&pop("eax"); # pop the temp variable off the stack
&pop("ebx");
&pop("ebp");
&pop("edi");
&pop("esi");
&ret();
&function_end_B($name);
}