# things perfect.
#
-push(@INC,"perlasm","../../perlasm");
+$0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
+push(@INC,"${dir}","${dir}../../perlasm");
require "x86asm.pl";
&asm_init($ARGV[0],"crypt586.pl");
$L="edi";
$R="esi";
-&external_label("des_SPtrans");
+&external_label("DES_SPtrans");
&fcrypt_body("fcrypt_body");
&asm_finish();
{
local($name,$do_ip)=@_;
- &function_begin($name,"EXTRN _des_SPtrans:DWORD");
+ &function_begin($name);
&comment("");
&comment("Load the 2 words");
- $ks="ebp";
+ $trans="ebp";
&xor( $L, $L);
&xor( $R, $R);
- &mov($ks,&wparam(1));
- &push(25); # add a variable
+ # PIC-ification:-)
+ &picmeup("edx","DES_SPtrans");
+ #if ($cpp) { &picmeup("edx","DES_SPtrans"); }
+ #else { &lea("edx",&DWP("DES_SPtrans")); }
+ &push("edx"); # becomes &swtmp(1)
+ #
+ &mov($trans,&wparam(1)); # reloaded with DES_SPtrans in D_ENCRYPT
+
+ &push(&DWC(25)); # add a variable
&set_label("start");
for ($i=0; $i<16; $i+=2)
{
&comment("");
&comment("Round $i");
- &D_ENCRYPT($i,$L,$R,$i*2,$ks,"des_SPtrans","eax","ebx","ecx","edx");
+ &D_ENCRYPT($i,$L,$R,$i*2,$trans,"eax","ebx","ecx","edx");
&comment("");
&comment("Round ".sprintf("%d",$i+1));
- &D_ENCRYPT($i+1,$R,$L,($i+1)*2,$ks,"des_SPtrans","eax","ebx","ecx","edx");
+ &D_ENCRYPT($i+1,$R,$L,($i+1)*2,$trans,"eax","ebx","ecx","edx");
}
&mov("ebx", &swtmp(0));
&mov("eax", $L);
&mov(&DWP(0,"edx","",0),"eax");
&mov(&DWP(4,"edx","",0),$L);
- &pop("ecx"); # remove variable
+ &add("esp",8); # remove variables
&function_end($name);
}
sub D_ENCRYPT
{
- local($r,$L,$R,$S,$ks,$desSP,$u,$tmp1,$tmp2,$t)=@_;
+ local($r,$L,$R,$S,$trans,$u,$tmp1,$tmp2,$t)=@_;
&mov( $u, &wparam(2)); # 2
&mov( $t, $R);
&shl( $tmp2, 16); # 1
&xor( $u, $tmp1); # 2
&xor( $t, $tmp2); # 2
- &mov( $tmp1, &DWP(&n2a($S*4),$ks,"",0)); # 2
+ &mov( $tmp1, &DWP(&n2a($S*4),$trans,"",0)); # 2
&xor( $u, $tmp1);
- &mov( $tmp2, &DWP(&n2a(($S+1)*4),$ks,"",0)); # 2
+ &mov( $tmp2, &DWP(&n2a(($S+1)*4),$trans,"",0)); # 2
&xor( $u, $R);
&xor( $t, $R);
&xor( $t, $tmp2);
&movb( &LB($tmp1), &LB($u) );
&movb( &LB($tmp2), &HB($u) );
&rotr( $t, 4 );
- &mov( $ks, &DWP(" $desSP",$tmp1,"",0));
+ &mov( $trans, &swtmp(1));
+ &xor( $L, &DWP(" ",$trans,$tmp1,0));
&movb( &LB($tmp1), &LB($t) );
- &xor( $L, $ks);
- &mov( $ks, &DWP("0x200+$desSP",$tmp2,"",0));
- &xor( $L, $ks);
+ &xor( $L, &DWP("0x200",$trans,$tmp2,0));
&movb( &LB($tmp2), &HB($t) );
&shr( $u, 16);
- &mov( $ks, &DWP("0x100+$desSP",$tmp1,"",0));
- &xor( $L, $ks);
+ &xor( $L, &DWP("0x100",$trans,$tmp1,0));
&movb( &LB($tmp1), &HB($u) );
&shr( $t, 16);
- &mov( $ks, &DWP("0x300+$desSP",$tmp2,"",0));
- &xor( $L, $ks);
- &mov( $ks, &wparam(1));
+ &xor( $L, &DWP("0x300",$trans,$tmp2,0));
&movb( &LB($tmp2), &HB($t) );
&and( $u, "0xff" );
&and( $t, "0xff" );
- &mov( $tmp1, &DWP("0x600+$desSP",$tmp1,"",0));
+ &mov( $tmp1, &DWP("0x600",$trans,$tmp1,0));
&xor( $L, $tmp1);
- &mov( $tmp1, &DWP("0x700+$desSP",$tmp2,"",0));
+ &mov( $tmp1, &DWP("0x700",$trans,$tmp2,0));
&xor( $L, $tmp1);
- &mov( $tmp1, &DWP("0x400+$desSP",$u,"",0));
+ &mov( $tmp1, &DWP("0x400",$trans,$u,0));
&xor( $L, $tmp1);
- &mov( $tmp1, &DWP("0x500+$desSP",$t,"",0));
+ &mov( $tmp1, &DWP("0x500",$trans,$t,0));
&xor( $L, $tmp1);
+ &mov( $trans, &wparam(1));
}
sub n2a