#!/usr/local/bin/perl$prog="des686.pl";# base code is in microsft# op dest, source# format.## WILL NOT WORK ANYMORE WITH desboth.plrequire "desboth.pl";if (	($ARGV[0] eq "elf"))	{ require "x86unix.pl"; }elsif (	($ARGV[0] eq "a.out"))	{ $aout=1; require "x86unix.pl"; }elsif (	($ARGV[0] eq "sol"))	{ $sol=1; require "x86unix.pl"; }elsif ( ($ARGV[0] eq "cpp"))	{ $cpp=1; require "x86unix.pl"; }elsif (	($ARGV[0] eq "win32"))	{ require "x86ms.pl"; }else	{	print STDERR <<"EOF";Pick one target type from	elf	- linux, FreeBSD etc	a.out	- old linux	sol	- x86 solaris	cpp	- format so x86unix.cpp can be used	win32	- Windows 95/Windows NTEOF	exit(1);	}&comment("Don't even think of reading this code");&comment("It was automatically generated by $prog");&comment("Which is a perl program used to generate the x86 assember for");&comment("any of elf, a.out, Win32, or Solaris");&comment("It can be found in SSLeay 0.6.5+ or in libdes 3.26+");&comment("eric <eay\@cryptsoft.com>");&comment("");&file("dx86xxxx");$L="edi";$R="esi";&DES_encrypt("DES_encrypt1",1);&DES_encrypt("DES_encrypt2",0);&DES_encrypt3("DES_encrypt3",1);&DES_encrypt3("DES_decrypt3",0);&file_end();sub DES_encrypt	{	local($name,$do_ip)=@_;	&function_begin($name,"EXTRN   _DES_SPtrans:DWORD");	&comment("");	&comment("Load the 2 words");	&mov("eax",&wparam(0));	&mov($L,&DWP(0,"eax","",0));	&mov($R,&DWP(4,"eax","",0));	$ksp=&wparam(1);	if ($do_ip)		{		&comment("");		&comment("IP");		&IP_new($L,$R,"eax");		}	&comment("");	&comment("fixup rotate");	&rotl($R,3);	&rotl($L,3);	&exch($L,$R);	&comment("");	&comment("load counter, key_schedule and enc flag");	&mov("eax",&wparam(2));	# get encrypt flag	&mov("ebp",&wparam(1));	# get ks	&cmp("eax","0");	&je(&label("start_decrypt"));	# encrypting part	for ($i=0; $i<16; $i+=2)		{		&comment("");		&comment("Round $i");		&D_ENCRYPT($L,$R,$i*2,"ebp","DES_SPtrans","ecx","edx","eax","ebx");		&comment("");		&comment("Round ".sprintf("%d",$i+1));		&D_ENCRYPT($R,$L,($i+1)*2,"ebp","DES_SPtrans","ecx","edx","eax","ebx");		}	&jmp(&label("end"));	&set_label("start_decrypt");	for ($i=15; $i>0; $i-=2)		{		&comment("");		&comment("Round $i");		&D_ENCRYPT($L,$R,$i*2,"ebp","DES_SPtrans","ecx","edx","eax","ebx");		&comment("");		&comment("Round ".sprintf("%d",$i-1));		&D_ENCRYPT($R,$L,($i-1)*2,"ebp","DES_SPtrans","ecx","edx","eax","ebx");		}	&set_label("end");	&comment("");	&comment("Fixup");	&rotr($L,3);		# r	&rotr($R,3);		# l	if ($do_ip)		{		&comment("");		&comment("FP");		&FP_new($R,$L,"eax");		}	&mov("eax",&wparam(0));	&mov(&DWP(0,"eax","",0),$L);	&mov(&DWP(4,"eax","",0),$R);	&function_end($name);	}# The logic is to load R into 2 registers and operate on both at the same time.# We also load the 2 R's into 2 more registers so we can do the 'move word down a byte'# while also masking the other copy and doing a lookup.  We then also accumulate the# L value in 2 registers then combine them at the end.sub D_ENCRYPT	{	local($L,$R,$S,$ks,$desSP,$u,$t,$tmp1,$tmp2,$tmp3)=@_;	&mov(	$u,		&DWP(&n2a($S*4),$ks,"",0));	&mov(	$t,		&DWP(&n2a(($S+1)*4),$ks,"",0));	&xor(	$u,		$R		);	&xor(	$t,		$R		);	&rotr(	$t,		4		);	# the numbers at the end of the line are origional instruction order	&mov(	$tmp2,		$u		);			# 1 2	&mov(	$tmp1,		$t		);			# 1 1	&and(	$tmp2,		"0xfc"		);			# 1 4	&and(	$tmp1,		"0xfc"		);			# 1 3	&shr(	$t,		8		);			# 1 5	&xor(	$L,		&DWP("0x100+$desSP",$tmp1,"",0));	# 1 7	&shr(	$u,		8		);			# 1 6	&mov(	$tmp1,		&DWP("      $desSP",$tmp2,"",0));	# 1 8	&mov(	$tmp2,		$u		);			# 2 2	&xor(	$L,		$tmp1		);			# 1 9	&and(	$tmp2,		"0xfc"		);			# 2 4	&mov(	$tmp1,		$t		);			# 2 1	&and(	$tmp1,		"0xfc"		);			# 2 3	&shr(	$t,		8		);			# 2 5	&xor(	$L,		&DWP("0x300+$desSP",$tmp1,"",0));	# 2 7	&shr(	$u,		8		);			# 2 6	&mov(	$tmp1,		&DWP("0x200+$desSP",$tmp2,"",0));	# 2 8	&mov(	$tmp2,		$u		);			# 3 2	&xor(	$L,		$tmp1		);			# 2 9	&and(	$tmp2,		"0xfc"		);			# 3 4	&mov(	$tmp1,		$t		);			# 3 1 	&shr(	$u,		8		);			# 3 6	&and(	$tmp1,		"0xfc"		);			# 3 3	&shr(	$t,		8		);			# 3 5	&xor(	$L,		&DWP("0x500+$desSP",$tmp1,"",0));	# 3 7	&mov(	$tmp1,		&DWP("0x400+$desSP",$tmp2,"",0));	# 3 8	&and(	$t,		"0xfc"		);			# 4 1	&xor(	$L,		$tmp1		);			# 3 9	&and(	$u,		"0xfc"		);			# 4 2	&xor(	$L,		&DWP("0x700+$desSP",$t,"",0));		# 4 3	&xor(	$L,		&DWP("0x600+$desSP",$u,"",0));		# 4 4	}sub PERM_OP	{	local($a,$b,$tt,$shift,$mask)=@_;	&mov(	$tt,		$a		);	&shr(	$tt,		$shift		);	&xor(	$tt,		$b		);	&and(	$tt,		$mask		);	&xor(	$b,		$tt		);	&shl(	$tt,		$shift		);	&xor(	$a,		$tt		);	}sub IP_new	{	local($l,$r,$tt)=@_;	&PERM_OP($r,$l,$tt, 4,"0x0f0f0f0f");	&PERM_OP($l,$r,$tt,16,"0x0000ffff");	&PERM_OP($r,$l,$tt, 2,"0x33333333");	&PERM_OP($l,$r,$tt, 8,"0x00ff00ff");	&PERM_OP($r,$l,$tt, 1,"0x55555555");	}sub FP_new	{	local($l,$r,$tt)=@_;	&PERM_OP($l,$r,$tt, 1,"0x55555555");        &PERM_OP($r,$l,$tt, 8,"0x00ff00ff");        &PERM_OP($l,$r,$tt, 2,"0x33333333");        &PERM_OP($r,$l,$tt,16,"0x0000ffff");        &PERM_OP($l,$r,$tt, 4,"0x0f0f0f0f");	}sub n2a	{	sprintf("%d",$_[0]);	}