#!/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($D));@xo=( 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,	# R0 1, 6, 11, 0, 5, 10, 15, 4, 9, 14, 3, 8, 13, 2, 7, 12,	# R1 5, 8, 11, 14, 1, 4, 7, 10, 13, 0, 3, 6, 9, 12, 15, 2,	# R2 0, 7, 14, 5, 12, 3, 10, 1, 8, 15, 6, 13, 4, 11, 2, 9,	# R3 );&md5_block("md5_block_asm_host_order");&asm_finish();sub Np	{	local($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,$t)=@_;	# This one is different, only 3 logical operationsif (($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 $ki");	# &not($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);	}