- import of strongswan-2.7.0
- applied patch for charon
This commit is contained in:
Martin Willi
@@ -0,0 +1,204 @@
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#!/usr/bin/perl
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#
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# The inner loop instruction sequence and the IP/FP modifications are from
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# Svend Olaf Mikkelsen <[email protected]>
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# I've added the stuff needed for crypt() but I've not worried about making
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# things perfect.
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#
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push(@INC,"perlasm","../../perlasm");
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require "x86asm.pl";
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&asm_init($ARGV[0],"crypt586.pl");
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$L="edi";
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$R="esi";
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&external_label("des_SPtrans");
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&fcrypt_body("fcrypt_body");
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&asm_finish();
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sub fcrypt_body
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{
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local($name,$do_ip)=@_;
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&function_begin($name,"EXTRN _des_SPtrans:DWORD");
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&comment("");
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&comment("Load the 2 words");
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$ks="ebp";
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&xor( $L, $L);
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&xor( $R, $R);
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&mov($ks,&wparam(1));
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&push(25); # add a variable
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&set_label("start");
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for ($i=0; $i<16; $i+=2)
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{
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&comment("");
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&comment("Round $i");
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&D_ENCRYPT($i,$L,$R,$i*2,$ks,"des_SPtrans","eax","ebx","ecx","edx");
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&comment("");
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&comment("Round ".sprintf("%d",$i+1));
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&D_ENCRYPT($i+1,$R,$L,($i+1)*2,$ks,"des_SPtrans","eax","ebx","ecx","edx");
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}
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&mov("ebx", &swtmp(0));
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&mov("eax", $L);
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&dec("ebx");
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&mov($L, $R);
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&mov($R, "eax");
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&mov(&swtmp(0), "ebx");
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&jnz(&label("start"));
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&comment("");
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&comment("FP");
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&mov("edx",&wparam(0));
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&FP_new($R,$L,"eax",3);
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&mov(&DWP(0,"edx","",0),"eax");
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&mov(&DWP(4,"edx","",0),$L);
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&pop("ecx"); # remove variable
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&function_end($name);
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}
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sub D_ENCRYPT
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{
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local($r,$L,$R,$S,$ks,$desSP,$u,$tmp1,$tmp2,$t)=@_;
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&mov( $u, &wparam(2)); # 2
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&mov( $t, $R);
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&shr( $t, 16); # 1
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&mov( $tmp2, &wparam(3)); # 2
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&xor( $t, $R); # 1
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&and( $u, $t); # 2
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&and( $t, $tmp2); # 2
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&mov( $tmp1, $u);
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&shl( $tmp1, 16); # 1
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&mov( $tmp2, $t);
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&shl( $tmp2, 16); # 1
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&xor( $u, $tmp1); # 2
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&xor( $t, $tmp2); # 2
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&mov( $tmp1, &DWP(&n2a($S*4),$ks,"",0)); # 2
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&xor( $u, $tmp1);
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&mov( $tmp2, &DWP(&n2a(($S+1)*4),$ks,"",0)); # 2
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&xor( $u, $R);
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&xor( $t, $R);
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&xor( $t, $tmp2);
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&and( $u, "0xfcfcfcfc" ); # 2
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&xor( $tmp1, $tmp1); # 1
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&and( $t, "0xcfcfcfcf" ); # 2
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&xor( $tmp2, $tmp2);
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&movb( &LB($tmp1), &LB($u) );
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&movb( &LB($tmp2), &HB($u) );
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&rotr( $t, 4 );
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&mov( $ks, &DWP(" $desSP",$tmp1,"",0));
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&movb( &LB($tmp1), &LB($t) );
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&xor( $L, $ks);
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&mov( $ks, &DWP("0x200+$desSP",$tmp2,"",0));
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&xor( $L, $ks);
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&movb( &LB($tmp2), &HB($t) );
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&shr( $u, 16);
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&mov( $ks, &DWP("0x100+$desSP",$tmp1,"",0));
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&xor( $L, $ks);
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&movb( &LB($tmp1), &HB($u) );
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&shr( $t, 16);
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&mov( $ks, &DWP("0x300+$desSP",$tmp2,"",0));
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&xor( $L, $ks);
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&mov( $ks, &wparam(1));
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&movb( &LB($tmp2), &HB($t) );
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&and( $u, "0xff" );
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&and( $t, "0xff" );
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&mov( $tmp1, &DWP("0x600+$desSP",$tmp1,"",0));
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&xor( $L, $tmp1);
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&mov( $tmp1, &DWP("0x700+$desSP",$tmp2,"",0));
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&xor( $L, $tmp1);
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&mov( $tmp1, &DWP("0x400+$desSP",$u,"",0));
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&xor( $L, $tmp1);
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&mov( $tmp1, &DWP("0x500+$desSP",$t,"",0));
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&xor( $L, $tmp1);
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}
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sub n2a
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{
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sprintf("%d",$_[0]);
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}
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# now has a side affect of rotating $a by $shift
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sub R_PERM_OP
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{
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local($a,$b,$tt,$shift,$mask,$last)=@_;
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&rotl( $a, $shift ) if ($shift != 0);
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&mov( $tt, $a );
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&xor( $a, $b );
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&and( $a, $mask );
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if ($notlast eq $b)
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{
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&xor( $b, $a );
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&xor( $tt, $a );
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}
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else
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{
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&xor( $tt, $a );
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&xor( $b, $a );
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}
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&comment("");
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}
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sub IP_new
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{
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local($l,$r,$tt,$lr)=@_;
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&R_PERM_OP($l,$r,$tt, 4,"0xf0f0f0f0",$l);
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&R_PERM_OP($r,$tt,$l,20,"0xfff0000f",$l);
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&R_PERM_OP($l,$tt,$r,14,"0x33333333",$r);
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&R_PERM_OP($tt,$r,$l,22,"0x03fc03fc",$r);
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&R_PERM_OP($l,$r,$tt, 9,"0xaaaaaaaa",$r);
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if ($lr != 3)
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{
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if (($lr-3) < 0)
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{ &rotr($tt, 3-$lr); }
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else { &rotl($tt, $lr-3); }
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}
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if ($lr != 2)
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{
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if (($lr-2) < 0)
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{ &rotr($r, 2-$lr); }
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else { &rotl($r, $lr-2); }
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}
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}
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sub FP_new
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{
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local($l,$r,$tt,$lr)=@_;
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if ($lr != 2)
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{
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if (($lr-2) < 0)
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{ &rotl($r, 2-$lr); }
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else { &rotr($r, $lr-2); }
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}
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if ($lr != 3)
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{
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if (($lr-3) < 0)
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{ &rotl($l, 3-$lr); }
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else { &rotr($l, $lr-3); }
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}
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&R_PERM_OP($l,$r,$tt, 0,"0xaaaaaaaa",$r);
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&R_PERM_OP($tt,$r,$l,23,"0x03fc03fc",$r);
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&R_PERM_OP($l,$r,$tt,10,"0x33333333",$l);
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&R_PERM_OP($r,$tt,$l,18,"0xfff0000f",$l);
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&R_PERM_OP($l,$tt,$r,12,"0xf0f0f0f0",$r);
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&rotr($tt , 4);
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}
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@@ -0,0 +1,251 @@
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#!/usr/bin/perl
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#
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# The inner loop instruction sequence and the IP/FP modifications are from
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# Svend Olaf Mikkelsen <[email protected]>
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#
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push(@INC,"perlasm","../../perlasm");
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require "x86asm.pl";
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require "cbc.pl";
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require "desboth.pl";
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# base code is in microsft
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# op dest, source
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# format.
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#
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&asm_init($ARGV[0],"des-586.pl");
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$L="edi";
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$R="esi";
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&external_label("des_SPtrans");
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&des_encrypt("des_encrypt",1);
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&des_encrypt("des_encrypt2",0);
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&des_encrypt3("des_encrypt3",1);
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&des_encrypt3("des_decrypt3",0);
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&cbc("des_ncbc_encrypt","des_encrypt","des_encrypt",0,4,5,3,5,-1);
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&cbc("des_ede3_cbc_encrypt","des_encrypt3","des_decrypt3",0,6,7,3,4,5);
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&asm_finish();
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sub des_encrypt
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{
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local($name,$do_ip)=@_;
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&function_begin_B($name,"EXTRN _des_SPtrans:DWORD");
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&push("esi");
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&push("edi");
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&comment("");
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&comment("Load the 2 words");
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$ks="ebp";
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if ($do_ip)
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{
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&mov($R,&wparam(0));
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&xor( "ecx", "ecx" );
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&push("ebx");
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&push("ebp");
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&mov("eax",&DWP(0,$R,"",0));
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&mov("ebx",&wparam(2)); # get encrypt flag
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&mov($L,&DWP(4,$R,"",0));
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&comment("");
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&comment("IP");
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&IP_new("eax",$L,$R,3);
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}
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else
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{
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&mov("eax",&wparam(0));
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&xor( "ecx", "ecx" );
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&push("ebx");
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&push("ebp");
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&mov($R,&DWP(0,"eax","",0));
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&mov("ebx",&wparam(2)); # get encrypt flag
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&rotl($R,3);
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&mov($L,&DWP(4,"eax","",0));
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&rotl($L,3);
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}
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&mov( $ks, &wparam(1) );
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&cmp("ebx","0");
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&je(&label("start_decrypt"));
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for ($i=0; $i<16; $i+=2)
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{
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&comment("");
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&comment("Round $i");
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&D_ENCRYPT($i,$L,$R,$i*2,$ks,"des_SPtrans","eax","ebx","ecx","edx");
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&comment("");
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&comment("Round ".sprintf("%d",$i+1));
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&D_ENCRYPT($i+1,$R,$L,($i+1)*2,$ks,"des_SPtrans","eax","ebx","ecx","edx");
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}
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&jmp(&label("end"));
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&set_label("start_decrypt");
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for ($i=15; $i>0; $i-=2)
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{
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&comment("");
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&comment("Round $i");
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&D_ENCRYPT(15-$i,$L,$R,$i*2,$ks,"des_SPtrans","eax","ebx","ecx","edx");
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&comment("");
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&comment("Round ".sprintf("%d",$i-1));
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&D_ENCRYPT(15-$i+1,$R,$L,($i-1)*2,$ks,"des_SPtrans","eax","ebx","ecx","edx");
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}
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&set_label("end");
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if ($do_ip)
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{
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&comment("");
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&comment("FP");
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&mov("edx",&wparam(0));
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&FP_new($L,$R,"eax",3);
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&mov(&DWP(0,"edx","",0),"eax");
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&mov(&DWP(4,"edx","",0),$R);
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}
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else
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{
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&comment("");
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&comment("Fixup");
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&rotr($L,3); # r
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&mov("eax",&wparam(0));
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&rotr($R,3); # l
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&mov(&DWP(0,"eax","",0),$L);
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&mov(&DWP(4,"eax","",0),$R);
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}
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&pop("ebp");
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&pop("ebx");
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&pop("edi");
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&pop("esi");
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&ret();
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&function_end_B($name);
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}
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sub D_ENCRYPT
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{
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local($r,$L,$R,$S,$ks,$desSP,$u,$tmp1,$tmp2,$t)=@_;
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&mov( $u, &DWP(&n2a($S*4),$ks,"",0));
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&xor( $tmp1, $tmp1);
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&mov( $t, &DWP(&n2a(($S+1)*4),$ks,"",0));
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&xor( $u, $R);
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&xor( $t, $R);
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&and( $u, "0xfcfcfcfc" );
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&and( $t, "0xcfcfcfcf" );
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&movb( &LB($tmp1), &LB($u) );
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&movb( &LB($tmp2), &HB($u) );
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&rotr( $t, 4 );
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&mov( $ks, &DWP(" $desSP",$tmp1,"",0));
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&movb( &LB($tmp1), &LB($t) );
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&xor( $L, $ks);
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&mov( $ks, &DWP("0x200+$desSP",$tmp2,"",0));
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&xor( $L, $ks); ######
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&movb( &LB($tmp2), &HB($t) );
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&shr( $u, 16);
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&mov( $ks, &DWP("0x100+$desSP",$tmp1,"",0));
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&xor( $L, $ks); ######
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&movb( &LB($tmp1), &HB($u) );
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&shr( $t, 16);
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&mov( $ks, &DWP("0x300+$desSP",$tmp2,"",0));
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&xor( $L, $ks);
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&mov( $ks, &wparam(1) );
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&movb( &LB($tmp2), &HB($t) );
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&and( $u, "0xff" );
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&and( $t, "0xff" );
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&mov( $tmp1, &DWP("0x600+$desSP",$tmp1,"",0));
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&xor( $L, $tmp1);
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&mov( $tmp1, &DWP("0x700+$desSP",$tmp2,"",0));
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&xor( $L, $tmp1);
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&mov( $tmp1, &DWP("0x400+$desSP",$u,"",0));
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&xor( $L, $tmp1);
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&mov( $tmp1, &DWP("0x500+$desSP",$t,"",0));
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&xor( $L, $tmp1);
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}
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sub n2a
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{
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sprintf("%d",$_[0]);
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}
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# now has a side affect of rotating $a by $shift
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sub R_PERM_OP
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{
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local($a,$b,$tt,$shift,$mask,$last)=@_;
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&rotl( $a, $shift ) if ($shift != 0);
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&mov( $tt, $a );
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&xor( $a, $b );
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&and( $a, $mask );
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if (!$last eq $b)
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{
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&xor( $b, $a );
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&xor( $tt, $a );
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}
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else
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{
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&xor( $tt, $a );
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&xor( $b, $a );
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}
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&comment("");
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}
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sub IP_new
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{
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local($l,$r,$tt,$lr)=@_;
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&R_PERM_OP($l,$r,$tt, 4,"0xf0f0f0f0",$l);
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&R_PERM_OP($r,$tt,$l,20,"0xfff0000f",$l);
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&R_PERM_OP($l,$tt,$r,14,"0x33333333",$r);
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&R_PERM_OP($tt,$r,$l,22,"0x03fc03fc",$r);
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&R_PERM_OP($l,$r,$tt, 9,"0xaaaaaaaa",$r);
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if ($lr != 3)
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{
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if (($lr-3) < 0)
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{ &rotr($tt, 3-$lr); }
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else { &rotl($tt, $lr-3); }
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}
|
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if ($lr != 2)
|
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{
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if (($lr-2) < 0)
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{ &rotr($r, 2-$lr); }
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else { &rotl($r, $lr-2); }
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}
|
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}
|
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|
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sub FP_new
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||||
{
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local($l,$r,$tt,$lr)=@_;
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||||
|
||||
if ($lr != 2)
|
||||
{
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if (($lr-2) < 0)
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||||
{ &rotl($r, 2-$lr); }
|
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else { &rotr($r, $lr-2); }
|
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}
|
||||
if ($lr != 3)
|
||||
{
|
||||
if (($lr-3) < 0)
|
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{ &rotl($l, 3-$lr); }
|
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else { &rotr($l, $lr-3); }
|
||||
}
|
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|
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&R_PERM_OP($l,$r,$tt, 0,"0xaaaaaaaa",$r);
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&R_PERM_OP($tt,$r,$l,23,"0x03fc03fc",$r);
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&R_PERM_OP($l,$r,$tt,10,"0x33333333",$l);
|
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&R_PERM_OP($r,$tt,$l,18,"0xfff0000f",$l);
|
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&R_PERM_OP($l,$tt,$r,12,"0xf0f0f0f0",$r);
|
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&rotr($tt , 4);
|
||||
}
|
||||
|
||||
@@ -0,0 +1,230 @@
|
||||
#!/usr/bin/perl
|
||||
|
||||
$prog="des686.pl";
|
||||
|
||||
# base code is in microsft
|
||||
# op dest, source
|
||||
# format.
|
||||
#
|
||||
|
||||
# WILL NOT WORK ANYMORE WITH desboth.pl
|
||||
require "desboth.pl";
|
||||
|
||||
if ( ($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 NT
|
||||
EOF
|
||||
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";
|
||||
$R="esi";
|
||||
|
||||
&des_encrypt("des_encrypt",1);
|
||||
&des_encrypt("des_encrypt2",0);
|
||||
|
||||
&des_encrypt3("des_encrypt3",1);
|
||||
&des_encrypt3("des_decrypt3",0);
|
||||
|
||||
&file_end();
|
||||
|
||||
sub des_encrypt
|
||||
{
|
||||
local($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]);
|
||||
}
|
||||
@@ -0,0 +1,79 @@
|
||||
#!/usr/bin/perl
|
||||
|
||||
$L="edi";
|
||||
$R="esi";
|
||||
|
||||
sub des_encrypt3
|
||||
{
|
||||
local($name,$enc)=@_;
|
||||
|
||||
&function_begin_B($name,"");
|
||||
&push("ebx");
|
||||
&mov("ebx",&wparam(0));
|
||||
|
||||
&push("ebp");
|
||||
&push("esi");
|
||||
|
||||
&push("edi");
|
||||
|
||||
&comment("");
|
||||
&comment("Load the data words");
|
||||
&mov($L,&DWP(0,"ebx","",0));
|
||||
&mov($R,&DWP(4,"ebx","",0));
|
||||
&stack_push(3);
|
||||
|
||||
&comment("");
|
||||
&comment("IP");
|
||||
&IP_new($L,$R,"edx",0);
|
||||
|
||||
# put them back
|
||||
|
||||
if ($enc)
|
||||
{
|
||||
&mov(&DWP(4,"ebx","",0),$R);
|
||||
&mov("eax",&wparam(1));
|
||||
&mov(&DWP(0,"ebx","",0),"edx");
|
||||
&mov("edi",&wparam(2));
|
||||
&mov("esi",&wparam(3));
|
||||
}
|
||||
else
|
||||
{
|
||||
&mov(&DWP(4,"ebx","",0),$R);
|
||||
&mov("esi",&wparam(1));
|
||||
&mov(&DWP(0,"ebx","",0),"edx");
|
||||
&mov("edi",&wparam(2));
|
||||
&mov("eax",&wparam(3));
|
||||
}
|
||||
&mov(&swtmp(2), (($enc)?"1":"0"));
|
||||
&mov(&swtmp(1), "eax");
|
||||
&mov(&swtmp(0), "ebx");
|
||||
&call("des_encrypt2");
|
||||
&mov(&swtmp(2), (($enc)?"0":"1"));
|
||||
&mov(&swtmp(1), "edi");
|
||||
&mov(&swtmp(0), "ebx");
|
||||
&call("des_encrypt2");
|
||||
&mov(&swtmp(2), (($enc)?"1":"0"));
|
||||
&mov(&swtmp(1), "esi");
|
||||
&mov(&swtmp(0), "ebx");
|
||||
&call("des_encrypt2");
|
||||
|
||||
&stack_pop(3);
|
||||
&mov($L,&DWP(0,"ebx","",0));
|
||||
&mov($R,&DWP(4,"ebx","",0));
|
||||
|
||||
&comment("");
|
||||
&comment("FP");
|
||||
&FP_new($L,$R,"eax",0);
|
||||
|
||||
&mov(&DWP(0,"ebx","",0),"eax");
|
||||
&mov(&DWP(4,"ebx","",0),$R);
|
||||
|
||||
&pop("edi");
|
||||
&pop("esi");
|
||||
&pop("ebp");
|
||||
&pop("ebx");
|
||||
&ret();
|
||||
&function_end_B($name);
|
||||
}
|
||||
|
||||
|
||||
@@ -0,0 +1,342 @@
|
||||
#!/usr/bin/perl
|
||||
|
||||
# void des_ncbc_encrypt(input, output, length, schedule, ivec, enc)
|
||||
# des_cblock (*input);
|
||||
# des_cblock (*output);
|
||||
# long length;
|
||||
# des_key_schedule schedule;
|
||||
# des_cblock (*ivec);
|
||||
# int enc;
|
||||
#
|
||||
# calls
|
||||
# des_encrypt((DES_LONG *)tin,schedule,DES_ENCRYPT);
|
||||
#
|
||||
|
||||
#&cbc("des_ncbc_encrypt","des_encrypt",0);
|
||||
#&cbc("BF_cbc_encrypt","BF_encrypt","BF_encrypt",
|
||||
# 1,4,5,3,5,-1);
|
||||
#&cbc("des_ncbc_encrypt","des_encrypt","des_encrypt",
|
||||
# 0,4,5,3,5,-1);
|
||||
#&cbc("des_ede3_cbc_encrypt","des_encrypt3","des_decrypt3",
|
||||
# 0,6,7,3,4,5);
|
||||
#
|
||||
# When doing a cipher that needs bigendian order,
|
||||
# for encrypt, the iv is kept in bigendian form,
|
||||
# while for decrypt, it is kept in little endian.
|
||||
sub cbc
|
||||
{
|
||||
local($name,$enc_func,$dec_func,$swap,$iv_off,$enc_off,$p1,$p2,$p3)=@_;
|
||||
# name is the function name
|
||||
# enc_func and dec_func and the functions to call for encrypt/decrypt
|
||||
# swap is true if byte order needs to be reversed
|
||||
# iv_off is parameter number for the iv
|
||||
# enc_off is parameter number for the encrypt/decrypt flag
|
||||
# p1,p2,p3 are the offsets for parameters to be passed to the
|
||||
# underlying calls.
|
||||
|
||||
&function_begin_B($name,"");
|
||||
&comment("");
|
||||
|
||||
$in="esi";
|
||||
$out="edi";
|
||||
$count="ebp";
|
||||
|
||||
&push("ebp");
|
||||
&push("ebx");
|
||||
&push("esi");
|
||||
&push("edi");
|
||||
|
||||
$data_off=4;
|
||||
$data_off+=4 if ($p1 > 0);
|
||||
$data_off+=4 if ($p2 > 0);
|
||||
$data_off+=4 if ($p3 > 0);
|
||||
|
||||
&mov($count, &wparam(2)); # length
|
||||
|
||||
&comment("getting iv ptr from parameter $iv_off");
|
||||
&mov("ebx", &wparam($iv_off)); # Get iv ptr
|
||||
|
||||
&mov($in, &DWP(0,"ebx","",0));# iv[0]
|
||||
&mov($out, &DWP(4,"ebx","",0));# iv[1]
|
||||
|
||||
&push($out);
|
||||
&push($in);
|
||||
&push($out); # used in decrypt for iv[1]
|
||||
&push($in); # used in decrypt for iv[0]
|
||||
|
||||
&mov("ebx", "esp"); # This is the address of tin[2]
|
||||
|
||||
&mov($in, &wparam(0)); # in
|
||||
&mov($out, &wparam(1)); # out
|
||||
|
||||
# We have loaded them all, how lets push things
|
||||
&comment("getting encrypt flag from parameter $enc_off");
|
||||
&mov("ecx", &wparam($enc_off)); # Get enc flag
|
||||
if ($p3 > 0)
|
||||
{
|
||||
&comment("get and push parameter $p3");
|
||||
if ($enc_off != $p3)
|
||||
{ &mov("eax", &wparam($p3)); &push("eax"); }
|
||||
else { &push("ecx"); }
|
||||
}
|
||||
if ($p2 > 0)
|
||||
{
|
||||
&comment("get and push parameter $p2");
|
||||
if ($enc_off != $p2)
|
||||
{ &mov("eax", &wparam($p2)); &push("eax"); }
|
||||
else { &push("ecx"); }
|
||||
}
|
||||
if ($p1 > 0)
|
||||
{
|
||||
&comment("get and push parameter $p1");
|
||||
if ($enc_off != $p1)
|
||||
{ &mov("eax", &wparam($p1)); &push("eax"); }
|
||||
else { &push("ecx"); }
|
||||
}
|
||||
&push("ebx"); # push data/iv
|
||||
|
||||
&cmp("ecx",0);
|
||||
&jz(&label("decrypt"));
|
||||
|
||||
&and($count,0xfffffff8);
|
||||
&mov("eax", &DWP($data_off,"esp","",0)); # load iv[0]
|
||||
&mov("ebx", &DWP($data_off+4,"esp","",0)); # load iv[1]
|
||||
|
||||
&jz(&label("encrypt_finish"));
|
||||
|
||||
#############################################################
|
||||
|
||||
&set_label("encrypt_loop");
|
||||
# encrypt start
|
||||
# "eax" and "ebx" hold iv (or the last cipher text)
|
||||
|
||||
&mov("ecx", &DWP(0,$in,"",0)); # load first 4 bytes
|
||||
&mov("edx", &DWP(4,$in,"",0)); # second 4 bytes
|
||||
|
||||
&xor("eax", "ecx");
|
||||
&xor("ebx", "edx");
|
||||
|
||||
&bswap("eax") if $swap;
|
||||
&bswap("ebx") if $swap;
|
||||
|
||||
&mov(&DWP($data_off,"esp","",0), "eax"); # put in array for call
|
||||
&mov(&DWP($data_off+4,"esp","",0), "ebx"); #
|
||||
|
||||
&call($enc_func);
|
||||
|
||||
&mov("eax", &DWP($data_off,"esp","",0));
|
||||
&mov("ebx", &DWP($data_off+4,"esp","",0));
|
||||
|
||||
&bswap("eax") if $swap;
|
||||
&bswap("ebx") if $swap;
|
||||
|
||||
&mov(&DWP(0,$out,"",0),"eax");
|
||||
&mov(&DWP(4,$out,"",0),"ebx");
|
||||
|
||||
# eax and ebx are the next iv.
|
||||
|
||||
&add($in, 8);
|
||||
&add($out, 8);
|
||||
|
||||
&sub($count, 8);
|
||||
&jnz(&label("encrypt_loop"));
|
||||
|
||||
###################################################################3
|
||||
&set_label("encrypt_finish");
|
||||
&mov($count, &wparam(2)); # length
|
||||
&and($count, 7);
|
||||
&jz(&label("finish"));
|
||||
&xor("ecx","ecx");
|
||||
&xor("edx","edx");
|
||||
&mov($count,&DWP(&label("cbc_enc_jmp_table"),"",$count,4));
|
||||
&jmp_ptr($count);
|
||||
|
||||
&set_label("ej7");
|
||||
&xor("edx", "edx") if $ppro; # ppro friendly
|
||||
&movb(&HB("edx"), &BP(6,$in,"",0));
|
||||
&shl("edx",8);
|
||||
&set_label("ej6");
|
||||
&movb(&HB("edx"), &BP(5,$in,"",0));
|
||||
&set_label("ej5");
|
||||
&movb(&LB("edx"), &BP(4,$in,"",0));
|
||||
&set_label("ej4");
|
||||
&mov("ecx", &DWP(0,$in,"",0));
|
||||
&jmp(&label("ejend"));
|
||||
&set_label("ej3");
|
||||
&movb(&HB("ecx"), &BP(2,$in,"",0));
|
||||
&xor("ecx", "ecx") if $ppro; # ppro friendly
|
||||
&shl("ecx",8);
|
||||
&set_label("ej2");
|
||||
&movb(&HB("ecx"), &BP(1,$in,"",0));
|
||||
&set_label("ej1");
|
||||
&movb(&LB("ecx"), &BP(0,$in,"",0));
|
||||
&set_label("ejend");
|
||||
|
||||
&xor("eax", "ecx");
|
||||
&xor("ebx", "edx");
|
||||
|
||||
&bswap("eax") if $swap;
|
||||
&bswap("ebx") if $swap;
|
||||
|
||||
&mov(&DWP($data_off,"esp","",0), "eax"); # put in array for call
|
||||
&mov(&DWP($data_off+4,"esp","",0), "ebx"); #
|
||||
|
||||
&call($enc_func);
|
||||
|
||||
&mov("eax", &DWP($data_off,"esp","",0));
|
||||
&mov("ebx", &DWP($data_off+4,"esp","",0));
|
||||
|
||||
&bswap("eax") if $swap;
|
||||
&bswap("ebx") if $swap;
|
||||
|
||||
&mov(&DWP(0,$out,"",0),"eax");
|
||||
&mov(&DWP(4,$out,"",0),"ebx");
|
||||
|
||||
&jmp(&label("finish"));
|
||||
|
||||
#############################################################
|
||||
#############################################################
|
||||
&set_label("decrypt",1);
|
||||
# decrypt start
|
||||
&and($count,0xfffffff8);
|
||||
# The next 2 instructions are only for if the jz is taken
|
||||
&mov("eax", &DWP($data_off+8,"esp","",0)); # get iv[0]
|
||||
&mov("ebx", &DWP($data_off+12,"esp","",0)); # get iv[1]
|
||||
&jz(&label("decrypt_finish"));
|
||||
|
||||
&set_label("decrypt_loop");
|
||||
&mov("eax", &DWP(0,$in,"",0)); # load first 4 bytes
|
||||
&mov("ebx", &DWP(4,$in,"",0)); # second 4 bytes
|
||||
|
||||
&bswap("eax") if $swap;
|
||||
&bswap("ebx") if $swap;
|
||||
|
||||
&mov(&DWP($data_off,"esp","",0), "eax"); # put back
|
||||
&mov(&DWP($data_off+4,"esp","",0), "ebx"); #
|
||||
|
||||
&call($dec_func);
|
||||
|
||||
&mov("eax", &DWP($data_off,"esp","",0)); # get return
|
||||
&mov("ebx", &DWP($data_off+4,"esp","",0)); #
|
||||
|
||||
&bswap("eax") if $swap;
|
||||
&bswap("ebx") if $swap;
|
||||
|
||||
&mov("ecx", &DWP($data_off+8,"esp","",0)); # get iv[0]
|
||||
&mov("edx", &DWP($data_off+12,"esp","",0)); # get iv[1]
|
||||
|
||||
&xor("ecx", "eax");
|
||||
&xor("edx", "ebx");
|
||||
|
||||
&mov("eax", &DWP(0,$in,"",0)); # get old cipher text,
|
||||
&mov("ebx", &DWP(4,$in,"",0)); # next iv actually
|
||||
|
||||
&mov(&DWP(0,$out,"",0),"ecx");
|
||||
&mov(&DWP(4,$out,"",0),"edx");
|
||||
|
||||
&mov(&DWP($data_off+8,"esp","",0), "eax"); # save iv
|
||||
&mov(&DWP($data_off+12,"esp","",0), "ebx"); #
|
||||
|
||||
&add($in, 8);
|
||||
&add($out, 8);
|
||||
|
||||
&sub($count, 8);
|
||||
&jnz(&label("decrypt_loop"));
|
||||
############################ ENDIT #######################3
|
||||
&set_label("decrypt_finish");
|
||||
&mov($count, &wparam(2)); # length
|
||||
&and($count, 7);
|
||||
&jz(&label("finish"));
|
||||
|
||||
&mov("eax", &DWP(0,$in,"",0)); # load first 4 bytes
|
||||
&mov("ebx", &DWP(4,$in,"",0)); # second 4 bytes
|
||||
|
||||
&bswap("eax") if $swap;
|
||||
&bswap("ebx") if $swap;
|
||||
|
||||
&mov(&DWP($data_off,"esp","",0), "eax"); # put back
|
||||
&mov(&DWP($data_off+4,"esp","",0), "ebx"); #
|
||||
|
||||
&call($dec_func);
|
||||
|
||||
&mov("eax", &DWP($data_off,"esp","",0)); # get return
|
||||
&mov("ebx", &DWP($data_off+4,"esp","",0)); #
|
||||
|
||||
&bswap("eax") if $swap;
|
||||
&bswap("ebx") if $swap;
|
||||
|
||||
&mov("ecx", &DWP($data_off+8,"esp","",0)); # get iv[0]
|
||||
&mov("edx", &DWP($data_off+12,"esp","",0)); # get iv[1]
|
||||
|
||||
&xor("ecx", "eax");
|
||||
&xor("edx", "ebx");
|
||||
|
||||
# this is for when we exit
|
||||
&mov("eax", &DWP(0,$in,"",0)); # get old cipher text,
|
||||
&mov("ebx", &DWP(4,$in,"",0)); # next iv actually
|
||||
|
||||
&set_label("dj7");
|
||||
&rotr("edx", 16);
|
||||
&movb(&BP(6,$out,"",0), &LB("edx"));
|
||||
&shr("edx",16);
|
||||
&set_label("dj6");
|
||||
&movb(&BP(5,$out,"",0), &HB("edx"));
|
||||
&set_label("dj5");
|
||||
&movb(&BP(4,$out,"",0), &LB("edx"));
|
||||
&set_label("dj4");
|
||||
&mov(&DWP(0,$out,"",0), "ecx");
|
||||
&jmp(&label("djend"));
|
||||
&set_label("dj3");
|
||||
&rotr("ecx", 16);
|
||||
&movb(&BP(2,$out,"",0), &LB("ecx"));
|
||||
&shl("ecx",16);
|
||||
&set_label("dj2");
|
||||
&movb(&BP(1,$in,"",0), &HB("ecx"));
|
||||
&set_label("dj1");
|
||||
&movb(&BP(0,$in,"",0), &LB("ecx"));
|
||||
&set_label("djend");
|
||||
|
||||
# final iv is still in eax:ebx
|
||||
&jmp(&label("finish"));
|
||||
|
||||
|
||||
############################ FINISH #######################3
|
||||
&set_label("finish",1);
|
||||
&mov("ecx", &wparam($iv_off)); # Get iv ptr
|
||||
|
||||
#################################################
|
||||
$total=16+4;
|
||||
$total+=4 if ($p1 > 0);
|
||||
$total+=4 if ($p2 > 0);
|
||||
$total+=4 if ($p3 > 0);
|
||||
&add("esp",$total);
|
||||
|
||||
&mov(&DWP(0,"ecx","",0), "eax"); # save iv
|
||||
&mov(&DWP(4,"ecx","",0), "ebx"); # save iv
|
||||
|
||||
&function_end_A($name);
|
||||
|
||||
&set_label("cbc_enc_jmp_table",1);
|
||||
&data_word("0");
|
||||
&data_word(&label("ej1"));
|
||||
&data_word(&label("ej2"));
|
||||
&data_word(&label("ej3"));
|
||||
&data_word(&label("ej4"));
|
||||
&data_word(&label("ej5"));
|
||||
&data_word(&label("ej6"));
|
||||
&data_word(&label("ej7"));
|
||||
&set_label("cbc_dec_jmp_table",1);
|
||||
&data_word("0");
|
||||
&data_word(&label("dj1"));
|
||||
&data_word(&label("dj2"));
|
||||
&data_word(&label("dj3"));
|
||||
&data_word(&label("dj4"));
|
||||
&data_word(&label("dj5"));
|
||||
&data_word(&label("dj6"));
|
||||
&data_word(&label("dj7"));
|
||||
|
||||
&function_end_B($name);
|
||||
|
||||
}
|
||||
|
||||
1;
|
||||
@@ -0,0 +1,124 @@
|
||||
The perl scripts in this directory are my 'hack' to generate
|
||||
multiple different assembler formats via the one origional script.
|
||||
|
||||
The way to use this library is to start with adding the path to this directory
|
||||
and then include it.
|
||||
|
||||
push(@INC,"perlasm","../../perlasm");
|
||||
require "x86asm.pl";
|
||||
|
||||
The first thing we do is setup the file and type of assember
|
||||
|
||||
&asm_init($ARGV[0],$0);
|
||||
|
||||
The first argument is the 'type'. Currently
|
||||
'cpp', 'sol', 'a.out', 'elf' or 'win32'.
|
||||
Argument 2 is the file name.
|
||||
|
||||
The reciprocal function is
|
||||
&asm_finish() which should be called at the end.
|
||||
|
||||
There are 2 main 'packages'. x86ms.pl, which is the microsoft assembler,
|
||||
and x86unix.pl which is the unix (gas) version.
|
||||
|
||||
Functions of interest are:
|
||||
&external_label("des_SPtrans"); declare and external variable
|
||||
&LB(reg); Low byte for a register
|
||||
&HB(reg); High byte for a register
|
||||
&BP(off,base,index,scale) Byte pointer addressing
|
||||
&DWP(off,base,index,scale) Word pointer addressing
|
||||
&stack_push(num) Basically a 'sub esp, num*4' with extra
|
||||
&stack_pop(num) inverse of stack_push
|
||||
&function_begin(name,extra) Start a function with pushing of
|
||||
edi, esi, ebx and ebp. extra is extra win32
|
||||
external info that may be required.
|
||||
&function_begin_B(name,extra) Same as norma function_begin but no pushing.
|
||||
&function_end(name) Call at end of function.
|
||||
&function_end_A(name) Standard pop and ret, for use inside functions
|
||||
&function_end_B(name) Call at end but with poping or 'ret'.
|
||||
&swtmp(num) Address on stack temp word.
|
||||
&wparam(num) Parameter number num, that was push
|
||||
in C convention. This all works over pushes
|
||||
and pops.
|
||||
&comment("hello there") Put in a comment.
|
||||
&label("loop") Refer to a label, normally a jmp target.
|
||||
&set_label("loop") Set a label at this point.
|
||||
&data_word(word) Put in a word of data.
|
||||
|
||||
So how does this all hold together? Given
|
||||
|
||||
int calc(int len, int *data)
|
||||
{
|
||||
int i,j=0;
|
||||
|
||||
for (i=0; i<len; i++)
|
||||
{
|
||||
j+=other(data[i]);
|
||||
}
|
||||
}
|
||||
|
||||
So a very simple version of this function could be coded as
|
||||
|
||||
push(@INC,"perlasm","../../perlasm");
|
||||
require "x86asm.pl";
|
||||
|
||||
&asm_init($ARGV[0],"cacl.pl");
|
||||
|
||||
&external_label("other");
|
||||
|
||||
$tmp1= "eax";
|
||||
$j= "edi";
|
||||
$data= "esi";
|
||||
$i= "ebp";
|
||||
|
||||
&comment("a simple function");
|
||||
&function_begin("calc");
|
||||
&mov( $data, &wparam(1)); # data
|
||||
&xor( $j, $j);
|
||||
&xor( $i, $i);
|
||||
|
||||
&set_label("loop");
|
||||
&cmp( $i, &wparam(0));
|
||||
&jge( &label("end"));
|
||||
|
||||
&mov( $tmp1, &DWP(0,$data,$i,4));
|
||||
&push( $tmp1);
|
||||
&call( "other");
|
||||
&add( $j, "eax");
|
||||
&pop( $tmp1);
|
||||
&inc( $i);
|
||||
&jmp( &label("loop"));
|
||||
|
||||
&set_label("end");
|
||||
&mov( "eax", $j);
|
||||
|
||||
&function_end("calc");
|
||||
|
||||
&asm_finish();
|
||||
|
||||
The above example is very very unoptimised but gives an idea of how
|
||||
things work.
|
||||
|
||||
There is also a cbc mode function generator in cbc.pl
|
||||
|
||||
&cbc( $name,
|
||||
$encrypt_function_name,
|
||||
$decrypt_function_name,
|
||||
$true_if_byte_swap_needed,
|
||||
$parameter_number_for_iv,
|
||||
$parameter_number_for_encrypt_flag,
|
||||
$first_parameter_to_pass,
|
||||
$second_parameter_to_pass,
|
||||
$third_parameter_to_pass);
|
||||
|
||||
So for example, given
|
||||
void BF_encrypt(BF_LONG *data,BF_KEY *key);
|
||||
void BF_decrypt(BF_LONG *data,BF_KEY *key);
|
||||
void BF_cbc_encrypt(unsigned char *in, unsigned char *out, long length,
|
||||
BF_KEY *ks, unsigned char *iv, int enc);
|
||||
|
||||
&cbc("BF_cbc_encrypt","BF_encrypt","BF_encrypt",1,4,5,3,-1,-1);
|
||||
|
||||
&cbc("des_ncbc_encrypt","des_encrypt","des_encrypt",0,4,5,3,5,-1);
|
||||
&cbc("des_ede3_cbc_encrypt","des_encrypt3","des_decrypt3",0,6,7,3,4,5);
|
||||
|
||||
@@ -0,0 +1,111 @@
|
||||
#!/usr/bin/perl
|
||||
|
||||
# require 'x86asm.pl';
|
||||
# &asm_init("cpp","des-586.pl");
|
||||
# XXX
|
||||
# XXX
|
||||
# main'asm_finish
|
||||
|
||||
sub main'asm_finish
|
||||
{
|
||||
&file_end();
|
||||
&asm_finish_cpp() if $cpp;
|
||||
print &asm_get_output();
|
||||
}
|
||||
|
||||
sub main'asm_init
|
||||
{
|
||||
($type,$fn)=@_;
|
||||
$filename=$fn;
|
||||
|
||||
$cpp=$sol=$aout=$win32=0;
|
||||
if ( ($type eq "elf"))
|
||||
{ require "x86unix.pl"; }
|
||||
elsif ( ($type eq "a.out"))
|
||||
{ $aout=1; require "x86unix.pl"; }
|
||||
elsif ( ($type eq "sol"))
|
||||
{ $sol=1; require "x86unix.pl"; }
|
||||
elsif ( ($type eq "cpp"))
|
||||
{ $cpp=1; require "x86unix.pl"; }
|
||||
elsif ( ($type eq "win32"))
|
||||
{ $win32=1; 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 NT
|
||||
EOF
|
||||
exit(1);
|
||||
}
|
||||
|
||||
&asm_init_output();
|
||||
|
||||
&comment("Don't even think of reading this code");
|
||||
&comment("It was automatically generated by $filename");
|
||||
&comment("Which is a perl program used to generate the x86 assember for");
|
||||
&comment("any of elf, a.out, BSDI,Win32, or Solaris");
|
||||
&comment("eric <eay\@cryptsoft.com>");
|
||||
&comment("");
|
||||
|
||||
$filename =~ s/\.pl$//;
|
||||
&file($filename);
|
||||
}
|
||||
|
||||
sub asm_finish_cpp
|
||||
{
|
||||
return unless $cpp;
|
||||
|
||||
local($tmp,$i);
|
||||
foreach $i (&get_labels())
|
||||
{
|
||||
$tmp.="#define $i _$i\n";
|
||||
}
|
||||
print <<"EOF";
|
||||
/* Run the C pre-processor over this file with one of the following defined
|
||||
* ELF - elf object files,
|
||||
* OUT - a.out object files,
|
||||
* BSDI - BSDI style a.out object files
|
||||
* SOL - Solaris style elf
|
||||
*/
|
||||
|
||||
#define TYPE(a,b) .type a,b
|
||||
#define SIZE(a,b) .size a,b
|
||||
|
||||
#if defined(OUT) || defined(BSDI)
|
||||
$tmp
|
||||
#endif
|
||||
|
||||
#ifdef OUT
|
||||
#define OK 1
|
||||
#define ALIGN 4
|
||||
#endif
|
||||
|
||||
#ifdef BSDI
|
||||
#define OK 1
|
||||
#define ALIGN 4
|
||||
#undef SIZE
|
||||
#undef TYPE
|
||||
#endif
|
||||
|
||||
#if defined(ELF) || defined(SOL)
|
||||
#define OK 1
|
||||
#define ALIGN 16
|
||||
#endif
|
||||
|
||||
#ifndef OK
|
||||
You need to define one of
|
||||
ELF - elf systems - linux-elf, NetBSD and DG-UX
|
||||
OUT - a.out systems - linux-a.out and FreeBSD
|
||||
SOL - solaris systems, which are elf with strange comment lines
|
||||
BSDI - a.out with a very primative version of as.
|
||||
#endif
|
||||
|
||||
/* Let the Assembler begin :-) */
|
||||
EOF
|
||||
}
|
||||
|
||||
1;
|
||||
@@ -0,0 +1,345 @@
|
||||
#!/usr/bin/perl
|
||||
|
||||
package x86ms;
|
||||
|
||||
$label="L000";
|
||||
|
||||
%lb=( 'eax', 'al',
|
||||
'ebx', 'bl',
|
||||
'ecx', 'cl',
|
||||
'edx', 'dl',
|
||||
'ax', 'al',
|
||||
'bx', 'bl',
|
||||
'cx', 'cl',
|
||||
'dx', 'dl',
|
||||
);
|
||||
|
||||
%hb=( 'eax', 'ah',
|
||||
'ebx', 'bh',
|
||||
'ecx', 'ch',
|
||||
'edx', 'dh',
|
||||
'ax', 'ah',
|
||||
'bx', 'bh',
|
||||
'cx', 'ch',
|
||||
'dx', 'dh',
|
||||
);
|
||||
|
||||
sub main'asm_init_output { @out=(); }
|
||||
sub main'asm_get_output { return(@out); }
|
||||
sub main'get_labels { return(@labels); }
|
||||
sub main'external_label { push(@labels,@_); }
|
||||
|
||||
sub main'LB
|
||||
{
|
||||
(defined($lb{$_[0]})) || die "$_[0] does not have a 'low byte'\n";
|
||||
return($lb{$_[0]});
|
||||
}
|
||||
|
||||
sub main'HB
|
||||
{
|
||||
(defined($hb{$_[0]})) || die "$_[0] does not have a 'high byte'\n";
|
||||
return($hb{$_[0]});
|
||||
}
|
||||
|
||||
sub main'BP
|
||||
{
|
||||
&get_mem("BYTE",@_);
|
||||
}
|
||||
|
||||
sub main'DWP
|
||||
{
|
||||
&get_mem("DWORD",@_);
|
||||
}
|
||||
|
||||
sub main'stack_push
|
||||
{
|
||||
local($num)=@_;
|
||||
$stack+=$num*4;
|
||||
&main'sub("esp",$num*4);
|
||||
}
|
||||
|
||||
sub main'stack_pop
|
||||
{
|
||||
local($num)=@_;
|
||||
$stack-=$num*4;
|
||||
&main'add("esp",$num*4);
|
||||
}
|
||||
|
||||
sub get_mem
|
||||
{
|
||||
local($size,$addr,$reg1,$reg2,$idx)=@_;
|
||||
local($t,$post);
|
||||
local($ret)="$size PTR ";
|
||||
|
||||
$addr =~ s/^\s+//;
|
||||
if ($addr =~ /^(.+)\+(.+)$/)
|
||||
{
|
||||
$reg2=&conv($1);
|
||||
$addr="_$2";
|
||||
}
|
||||
elsif ($addr =~ /^[_a-zA-Z]/)
|
||||
{
|
||||
$addr="_$addr";
|
||||
}
|
||||
|
||||
$reg1="$regs{$reg1}" if defined($regs{$reg1});
|
||||
$reg2="$regs{$reg2}" if defined($regs{$reg2});
|
||||
if (($addr ne "") && ($addr ne 0))
|
||||
{
|
||||
if ($addr !~ /^-/)
|
||||
{ $ret.=$addr; }
|
||||
else { $post=$addr; }
|
||||
}
|
||||
if ($reg2 ne "")
|
||||
{
|
||||
$t="";
|
||||
$t="*$idx" if ($idx != 0);
|
||||
$reg1="+".$reg1 if ("$reg1$post" ne "");
|
||||
$ret.="[$reg2$t$reg1$post]";
|
||||
}
|
||||
else
|
||||
{
|
||||
$ret.="[$reg1$post]"
|
||||
}
|
||||
return($ret);
|
||||
}
|
||||
|
||||
sub main'mov { &out2("mov",@_); }
|
||||
sub main'movb { &out2("mov",@_); }
|
||||
sub main'and { &out2("and",@_); }
|
||||
sub main'or { &out2("or",@_); }
|
||||
sub main'shl { &out2("shl",@_); }
|
||||
sub main'shr { &out2("shr",@_); }
|
||||
sub main'xor { &out2("xor",@_); }
|
||||
sub main'xorb { &out2("xor",@_); }
|
||||
sub main'add { &out2("add",@_); }
|
||||
sub main'adc { &out2("adc",@_); }
|
||||
sub main'sub { &out2("sub",@_); }
|
||||
sub main'rotl { &out2("rol",@_); }
|
||||
sub main'rotr { &out2("ror",@_); }
|
||||
sub main'exch { &out2("xchg",@_); }
|
||||
sub main'cmp { &out2("cmp",@_); }
|
||||
sub main'lea { &out2("lea",@_); }
|
||||
sub main'mul { &out1("mul",@_); }
|
||||
sub main'div { &out1("div",@_); }
|
||||
sub main'dec { &out1("dec",@_); }
|
||||
sub main'inc { &out1("inc",@_); }
|
||||
sub main'jmp { &out1("jmp",@_); }
|
||||
sub main'jmp_ptr { &out1p("jmp",@_); }
|
||||
sub main'je { &out1("je",@_); }
|
||||
sub main'jle { &out1("jle",@_); }
|
||||
sub main'jz { &out1("jz",@_); }
|
||||
sub main'jge { &out1("jge",@_); }
|
||||
sub main'jl { &out1("jl",@_); }
|
||||
sub main'jb { &out1("jb",@_); }
|
||||
sub main'jnz { &out1("jnz",@_); }
|
||||
sub main'jne { &out1("jne",@_); }
|
||||
sub main'push { &out1("push",@_); $stack+=4; }
|
||||
sub main'pop { &out1("pop",@_); $stack-=4; }
|
||||
sub main'bswap { &out1("bswap",@_); &using486(); }
|
||||
sub main'not { &out1("not",@_); }
|
||||
sub main'call { &out1("call",'_'.$_[0]); }
|
||||
sub main'ret { &out0("ret"); }
|
||||
sub main'nop { &out0("nop"); }
|
||||
|
||||
sub out2
|
||||
{
|
||||
local($name,$p1,$p2)=@_;
|
||||
local($l,$t);
|
||||
|
||||
push(@out,"\t$name\t");
|
||||
$t=&conv($p1).",";
|
||||
$l=length($t);
|
||||
push(@out,$t);
|
||||
$l=4-($l+9)/8;
|
||||
push(@out,"\t" x $l);
|
||||
push(@out,&conv($p2));
|
||||
push(@out,"\n");
|
||||
}
|
||||
|
||||
sub out0
|
||||
{
|
||||
local($name)=@_;
|
||||
|
||||
push(@out,"\t$name\n");
|
||||
}
|
||||
|
||||
sub out1
|
||||
{
|
||||
local($name,$p1)=@_;
|
||||
local($l,$t);
|
||||
|
||||
push(@out,"\t$name\t".&conv($p1)."\n");
|
||||
}
|
||||
|
||||
sub conv
|
||||
{
|
||||
local($p)=@_;
|
||||
|
||||
$p =~ s/0x([0-9A-Fa-f]+)/0$1h/;
|
||||
return $p;
|
||||
}
|
||||
|
||||
sub using486
|
||||
{
|
||||
return if $using486;
|
||||
$using486++;
|
||||
grep(s/\.386/\.486/,@out);
|
||||
}
|
||||
|
||||
sub main'file
|
||||
{
|
||||
local($file)=@_;
|
||||
|
||||
local($tmp)=<<"EOF";
|
||||
TITLE $file.asm
|
||||
.386
|
||||
.model FLAT
|
||||
EOF
|
||||
push(@out,$tmp);
|
||||
}
|
||||
|
||||
sub main'function_begin
|
||||
{
|
||||
local($func,$extra)=@_;
|
||||
|
||||
push(@labels,$func);
|
||||
|
||||
local($tmp)=<<"EOF";
|
||||
_TEXT SEGMENT
|
||||
PUBLIC _$func
|
||||
$extra
|
||||
_$func PROC NEAR
|
||||
push ebp
|
||||
push ebx
|
||||
push esi
|
||||
push edi
|
||||
EOF
|
||||
push(@out,$tmp);
|
||||
$stack=20;
|
||||
}
|
||||
|
||||
sub main'function_begin_B
|
||||
{
|
||||
local($func,$extra)=@_;
|
||||
|
||||
local($tmp)=<<"EOF";
|
||||
_TEXT SEGMENT
|
||||
PUBLIC _$func
|
||||
$extra
|
||||
_$func PROC NEAR
|
||||
EOF
|
||||
push(@out,$tmp);
|
||||
$stack=4;
|
||||
}
|
||||
|
||||
sub main'function_end
|
||||
{
|
||||
local($func)=@_;
|
||||
|
||||
local($tmp)=<<"EOF";
|
||||
pop edi
|
||||
pop esi
|
||||
pop ebx
|
||||
pop ebp
|
||||
ret
|
||||
_$func ENDP
|
||||
_TEXT ENDS
|
||||
EOF
|
||||
push(@out,$tmp);
|
||||
$stack=0;
|
||||
%label=();
|
||||
}
|
||||
|
||||
sub main'function_end_B
|
||||
{
|
||||
local($func)=@_;
|
||||
|
||||
local($tmp)=<<"EOF";
|
||||
_$func ENDP
|
||||
_TEXT ENDS
|
||||
EOF
|
||||
push(@out,$tmp);
|
||||
$stack=0;
|
||||
%label=();
|
||||
}
|
||||
|
||||
sub main'function_end_A
|
||||
{
|
||||
local($func)=@_;
|
||||
|
||||
local($tmp)=<<"EOF";
|
||||
pop edi
|
||||
pop esi
|
||||
pop ebx
|
||||
pop ebp
|
||||
ret
|
||||
EOF
|
||||
push(@out,$tmp);
|
||||
}
|
||||
|
||||
sub main'file_end
|
||||
{
|
||||
push(@out,"END\n");
|
||||
}
|
||||
|
||||
sub main'wparam
|
||||
{
|
||||
local($num)=@_;
|
||||
|
||||
return(&main'DWP($stack+$num*4,"esp","",0));
|
||||
}
|
||||
|
||||
sub main'swtmp
|
||||
{
|
||||
return(&main'DWP($_[0]*4,"esp","",0));
|
||||
}
|
||||
|
||||
# Should use swtmp, which is above esp. Linix can trash the stack above esp
|
||||
#sub main'wtmp
|
||||
# {
|
||||
# local($num)=@_;
|
||||
#
|
||||
# return(&main'DWP(-(($num+1)*4),"esp","",0));
|
||||
# }
|
||||
|
||||
sub main'comment
|
||||
{
|
||||
foreach (@_)
|
||||
{
|
||||
push(@out,"\t; $_\n");
|
||||
}
|
||||
}
|
||||
|
||||
sub main'label
|
||||
{
|
||||
if (!defined($label{$_[0]}))
|
||||
{
|
||||
$label{$_[0]}="\$${label}${_[0]}";
|
||||
$label++;
|
||||
}
|
||||
return($label{$_[0]});
|
||||
}
|
||||
|
||||
sub main'set_label
|
||||
{
|
||||
if (!defined($label{$_[0]}))
|
||||
{
|
||||
$label{$_[0]}="${label}${_[0]}";
|
||||
$label++;
|
||||
}
|
||||
push(@out,"$label{$_[0]}:\n");
|
||||
}
|
||||
|
||||
sub main'data_word
|
||||
{
|
||||
push(@out,"\tDD\t$_[0]\n");
|
||||
}
|
||||
|
||||
sub out1p
|
||||
{
|
||||
local($name,$p1)=@_;
|
||||
local($l,$t);
|
||||
|
||||
push(@out,"\t$name\t ".&conv($p1)."\n");
|
||||
}
|
||||
@@ -0,0 +1,403 @@
|
||||
#!/usr/bin/perl
|
||||
|
||||
package x86unix;
|
||||
|
||||
$label="L000";
|
||||
|
||||
$align=($main'aout)?"4":"16";
|
||||
$under=($main'aout)?"_":"";
|
||||
$com_start=($main'sol)?"/":"#";
|
||||
|
||||
sub main'asm_init_output { @out=(); }
|
||||
sub main'asm_get_output { return(@out); }
|
||||
sub main'get_labels { return(@labels); }
|
||||
sub main'external_label { push(@labels,@_); }
|
||||
|
||||
if ($main'cpp)
|
||||
{
|
||||
$align="ALIGN";
|
||||
$under="";
|
||||
$com_start='/*';
|
||||
$com_end='*/';
|
||||
}
|
||||
|
||||
%lb=( 'eax', '%al',
|
||||
'ebx', '%bl',
|
||||
'ecx', '%cl',
|
||||
'edx', '%dl',
|
||||
'ax', '%al',
|
||||
'bx', '%bl',
|
||||
'cx', '%cl',
|
||||
'dx', '%dl',
|
||||
);
|
||||
|
||||
%hb=( 'eax', '%ah',
|
||||
'ebx', '%bh',
|
||||
'ecx', '%ch',
|
||||
'edx', '%dh',
|
||||
'ax', '%ah',
|
||||
'bx', '%bh',
|
||||
'cx', '%ch',
|
||||
'dx', '%dh',
|
||||
);
|
||||
|
||||
%regs=( 'eax', '%eax',
|
||||
'ebx', '%ebx',
|
||||
'ecx', '%ecx',
|
||||
'edx', '%edx',
|
||||
'esi', '%esi',
|
||||
'edi', '%edi',
|
||||
'ebp', '%ebp',
|
||||
'esp', '%esp',
|
||||
);
|
||||
|
||||
%reg_val=(
|
||||
'eax', 0x00,
|
||||
'ebx', 0x03,
|
||||
'ecx', 0x01,
|
||||
'edx', 0x02,
|
||||
'esi', 0x06,
|
||||
'edi', 0x07,
|
||||
'ebp', 0x05,
|
||||
'esp', 0x04,
|
||||
);
|
||||
|
||||
sub main'LB
|
||||
{
|
||||
(defined($lb{$_[0]})) || die "$_[0] does not have a 'low byte'\n";
|
||||
return($lb{$_[0]});
|
||||
}
|
||||
|
||||
sub main'HB
|
||||
{
|
||||
(defined($hb{$_[0]})) || die "$_[0] does not have a 'high byte'\n";
|
||||
return($hb{$_[0]});
|
||||
}
|
||||
|
||||
sub main'DWP
|
||||
{
|
||||
local($addr,$reg1,$reg2,$idx)=@_;
|
||||
|
||||
$ret="";
|
||||
$addr =~ s/(^|[+ \t])([A-Za-z_]+)($|[+ \t])/$1$under$2$3/;
|
||||
$reg1="$regs{$reg1}" if defined($regs{$reg1});
|
||||
$reg2="$regs{$reg2}" if defined($regs{$reg2});
|
||||
$ret.=$addr if ($addr ne "") && ($addr ne 0);
|
||||
if ($reg2 ne "")
|
||||
{ $ret.="($reg1,$reg2,$idx)"; }
|
||||
else
|
||||
{ $ret.="($reg1)" }
|
||||
return($ret);
|
||||
}
|
||||
|
||||
sub main'BP
|
||||
{
|
||||
return(&main'DWP(@_));
|
||||
}
|
||||
|
||||
#sub main'BP
|
||||
# {
|
||||
# local($addr,$reg1,$reg2,$idx)=@_;
|
||||
#
|
||||
# $ret="";
|
||||
#
|
||||
# $addr =~ s/(^|[+ \t])([A-Za-z_]+)($|[+ \t])/$1$under$2$3/;
|
||||
# $reg1="$regs{$reg1}" if defined($regs{$reg1});
|
||||
# $reg2="$regs{$reg2}" if defined($regs{$reg2});
|
||||
# $ret.=$addr if ($addr ne "") && ($addr ne 0);
|
||||
# if ($reg2 ne "")
|
||||
# { $ret.="($reg1,$reg2,$idx)"; }
|
||||
# else
|
||||
# { $ret.="($reg1)" }
|
||||
# return($ret);
|
||||
# }
|
||||
|
||||
sub main'mov { &out2("movl",@_); }
|
||||
sub main'movb { &out2("movb",@_); }
|
||||
sub main'and { &out2("andl",@_); }
|
||||
sub main'or { &out2("orl",@_); }
|
||||
sub main'shl { &out2("sall",@_); }
|
||||
sub main'shr { &out2("shrl",@_); }
|
||||
sub main'xor { &out2("xorl",@_); }
|
||||
sub main'xorb { &out2("xorb",@_); }
|
||||
sub main'add { &out2("addl",@_); }
|
||||
sub main'adc { &out2("adcl",@_); }
|
||||
sub main'sub { &out2("subl",@_); }
|
||||
sub main'rotl { &out2("roll",@_); }
|
||||
sub main'rotr { &out2("rorl",@_); }
|
||||
sub main'exch { &out2("xchg",@_); }
|
||||
sub main'cmp { &out2("cmpl",@_); }
|
||||
sub main'lea { &out2("leal",@_); }
|
||||
sub main'mul { &out1("mull",@_); }
|
||||
sub main'div { &out1("divl",@_); }
|
||||
sub main'jmp { &out1("jmp",@_); }
|
||||
sub main'jmp_ptr { &out1p("jmp",@_); }
|
||||
sub main'je { &out1("je",@_); }
|
||||
sub main'jle { &out1("jle",@_); }
|
||||
sub main'jne { &out1("jne",@_); }
|
||||
sub main'jnz { &out1("jnz",@_); }
|
||||
sub main'jz { &out1("jz",@_); }
|
||||
sub main'jge { &out1("jge",@_); }
|
||||
sub main'jl { &out1("jl",@_); }
|
||||
sub main'jb { &out1("jb",@_); }
|
||||
sub main'dec { &out1("decl",@_); }
|
||||
sub main'inc { &out1("incl",@_); }
|
||||
sub main'push { &out1("pushl",@_); $stack+=4; }
|
||||
sub main'pop { &out1("popl",@_); $stack-=4; }
|
||||
sub main'bswap { &out1("bswapl",@_); }
|
||||
sub main'not { &out1("notl",@_); }
|
||||
sub main'call { &out1("call",$under.$_[0]); }
|
||||
sub main'ret { &out0("ret"); }
|
||||
sub main'nop { &out0("nop"); }
|
||||
|
||||
sub out2
|
||||
{
|
||||
local($name,$p1,$p2)=@_;
|
||||
local($l,$ll,$t);
|
||||
local(%special)=( "roll",0xD1C0,"rorl",0xD1C8,
|
||||
"rcll",0xD1D0,"rcrl",0xD1D8,
|
||||
"shll",0xD1E0,"shrl",0xD1E8,
|
||||
"sarl",0xD1F8);
|
||||
|
||||
if ((defined($special{$name})) && defined($regs{$p1}) && ($p2 == 1))
|
||||
{
|
||||
$op=$special{$name}|$reg_val{$p1};
|
||||
$tmp1=sprintf ".byte %d\n",($op>>8)&0xff;
|
||||
$tmp2=sprintf ".byte %d\t",$op &0xff;
|
||||
push(@out,$tmp1);
|
||||
push(@out,$tmp2);
|
||||
|
||||
$p2=&conv($p2);
|
||||
$p1=&conv($p1);
|
||||
&main'comment("$name $p2 $p1");
|
||||
return;
|
||||
}
|
||||
|
||||
push(@out,"\t$name\t");
|
||||
$t=&conv($p2).",";
|
||||
$l=length($t);
|
||||
push(@out,$t);
|
||||
$ll=4-($l+9)/8;
|
||||
$tmp1=sprintf "\t" x $ll;
|
||||
push(@out,$tmp1);
|
||||
push(@out,&conv($p1)."\n");
|
||||
}
|
||||
|
||||
sub out1
|
||||
{
|
||||
local($name,$p1)=@_;
|
||||
local($l,$t);
|
||||
|
||||
push(@out,"\t$name\t".&conv($p1)."\n");
|
||||
}
|
||||
|
||||
sub out1p
|
||||
{
|
||||
local($name,$p1)=@_;
|
||||
local($l,$t);
|
||||
|
||||
push(@out,"\t$name\t*".&conv($p1)."\n");
|
||||
}
|
||||
|
||||
sub out0
|
||||
{
|
||||
push(@out,"\t$_[0]\n");
|
||||
}
|
||||
|
||||
sub conv
|
||||
{
|
||||
local($p)=@_;
|
||||
|
||||
# $p =~ s/0x([0-9A-Fa-f]+)/0$1h/;
|
||||
|
||||
$p=$regs{$p} if (defined($regs{$p}));
|
||||
|
||||
$p =~ s/^(-{0,1}[0-9A-Fa-f]+)$/\$$1/;
|
||||
$p =~ s/^(0x[0-9A-Fa-f]+)$/\$$1/;
|
||||
return $p;
|
||||
}
|
||||
|
||||
sub main'file
|
||||
{
|
||||
local($file)=@_;
|
||||
|
||||
local($tmp)=<<"EOF";
|
||||
.file "$file.s"
|
||||
.version "01.01"
|
||||
gcc2_compiled.:
|
||||
EOF
|
||||
push(@out,$tmp);
|
||||
}
|
||||
|
||||
sub main'function_begin
|
||||
{
|
||||
local($func)=@_;
|
||||
|
||||
$func=$under.$func;
|
||||
|
||||
local($tmp)=<<"EOF";
|
||||
.text
|
||||
.align $align
|
||||
.globl $func
|
||||
EOF
|
||||
push(@out,$tmp);
|
||||
if ($main'cpp)
|
||||
{ $tmp=push(@out,"\tTYPE($func,\@function)\n"); }
|
||||
else { $tmp=push(@out,"\t.type\t$func,\@function\n"); }
|
||||
push(@out,"$func:\n");
|
||||
$tmp=<<"EOF";
|
||||
pushl %ebp
|
||||
pushl %ebx
|
||||
pushl %esi
|
||||
pushl %edi
|
||||
|
||||
EOF
|
||||
push(@out,$tmp);
|
||||
$stack=20;
|
||||
}
|
||||
|
||||
sub main'function_begin_B
|
||||
{
|
||||
local($func,$extra)=@_;
|
||||
|
||||
$func=$under.$func;
|
||||
|
||||
local($tmp)=<<"EOF";
|
||||
.text
|
||||
.align $align
|
||||
.globl $func
|
||||
EOF
|
||||
push(@out,$tmp);
|
||||
if ($main'cpp)
|
||||
{ push(@out,"\tTYPE($func,\@function)\n"); }
|
||||
else { push(@out,"\t.type $func,\@function\n"); }
|
||||
push(@out,"$func:\n");
|
||||
$stack=4;
|
||||
}
|
||||
|
||||
sub main'function_end
|
||||
{
|
||||
local($func)=@_;
|
||||
|
||||
$func=$under.$func;
|
||||
|
||||
local($tmp)=<<"EOF";
|
||||
popl %edi
|
||||
popl %esi
|
||||
popl %ebx
|
||||
popl %ebp
|
||||
ret
|
||||
.${func}_end:
|
||||
EOF
|
||||
push(@out,$tmp);
|
||||
if ($main'cpp)
|
||||
{ push(@out,"\tSIZE($func,.${func}_end-$func)\n"); }
|
||||
else { push(@out,"\t.size\t$func,.${func}_end-$func\n"); }
|
||||
push(@out,".ident \"$func\"\n");
|
||||
$stack=0;
|
||||
%label=();
|
||||
}
|
||||
|
||||
sub main'function_end_A
|
||||
{
|
||||
local($func)=@_;
|
||||
|
||||
local($tmp)=<<"EOF";
|
||||
popl %edi
|
||||
popl %esi
|
||||
popl %ebx
|
||||
popl %ebp
|
||||
ret
|
||||
EOF
|
||||
push(@out,$tmp);
|
||||
}
|
||||
|
||||
sub main'function_end_B
|
||||
{
|
||||
local($func)=@_;
|
||||
|
||||
$func=$under.$func;
|
||||
|
||||
push(@out,".${func}_end:\n");
|
||||
if ($main'cpp)
|
||||
{ push(@out,"\tSIZE($func,.${func}_end-$func)\n"); }
|
||||
else { push(@out,"\t.size\t$func,.${func}_end-$func\n"); }
|
||||
push(@out,".ident \"desasm.pl\"\n");
|
||||
$stack=0;
|
||||
%label=();
|
||||
}
|
||||
|
||||
sub main'wparam
|
||||
{
|
||||
local($num)=@_;
|
||||
|
||||
return(&main'DWP($stack+$num*4,"esp","",0));
|
||||
}
|
||||
|
||||
sub main'stack_push
|
||||
{
|
||||
local($num)=@_;
|
||||
$stack+=$num*4;
|
||||
&main'sub("esp",$num*4);
|
||||
}
|
||||
|
||||
sub main'stack_pop
|
||||
{
|
||||
local($num)=@_;
|
||||
$stack-=$num*4;
|
||||
&main'add("esp",$num*4);
|
||||
}
|
||||
|
||||
sub main'swtmp
|
||||
{
|
||||
return(&main'DWP($_[0]*4,"esp","",0));
|
||||
}
|
||||
|
||||
# Should use swtmp, which is above esp. Linix can trash the stack above esp
|
||||
#sub main'wtmp
|
||||
# {
|
||||
# local($num)=@_;
|
||||
#
|
||||
# return(&main'DWP(-($num+1)*4,"esp","",0));
|
||||
# }
|
||||
|
||||
sub main'comment
|
||||
{
|
||||
foreach (@_)
|
||||
{
|
||||
if (/^\s*$/)
|
||||
{ push(@out,"\n"); }
|
||||
else
|
||||
{ push(@out,"\t$com_start $_ $com_end\n"); }
|
||||
}
|
||||
}
|
||||
|
||||
sub main'label
|
||||
{
|
||||
if (!defined($label{$_[0]}))
|
||||
{
|
||||
$label{$_[0]}=".${label}${_[0]}";
|
||||
$label++;
|
||||
}
|
||||
return($label{$_[0]});
|
||||
}
|
||||
|
||||
sub main'set_label
|
||||
{
|
||||
if (!defined($label{$_[0]}))
|
||||
{
|
||||
$label{$_[0]}=".${label}${_[0]}";
|
||||
$label++;
|
||||
}
|
||||
push(@out,".align $align\n") if ($_[1] != 0);
|
||||
push(@out,"$label{$_[0]}:\n");
|
||||
}
|
||||
|
||||
sub main'file_end
|
||||
{
|
||||
}
|
||||
|
||||
sub main'data_word
|
||||
{
|
||||
push(@out,"\t.long $_[0]\n");
|
||||
}
|
||||
@@ -0,0 +1,131 @@
|
||||
First up, let me say I don't like writing in assembler. It is not portable,
|
||||
dependant on the particular CPU architecture release and is generally a pig
|
||||
to debug and get right. Having said that, the x86 architecture is probably
|
||||
the most important for speed due to number of boxes and since
|
||||
it appears to be the worst architecture to to get
|
||||
good C compilers for. So due to this, I have lowered myself to do
|
||||
assembler for the inner DES routines in libdes :-).
|
||||
|
||||
The file to implement in assembler is des_enc.c. Replace the following
|
||||
4 functions
|
||||
des_encrypt(DES_LONG data[2],des_key_schedule ks, int encrypt);
|
||||
des_encrypt2(DES_LONG data[2],des_key_schedule ks, int encrypt);
|
||||
des_encrypt3(DES_LONG data[2],des_key_schedule ks1,ks2,ks3);
|
||||
des_decrypt3(DES_LONG data[2],des_key_schedule ks1,ks2,ks3);
|
||||
|
||||
They encrypt/decrypt the 64 bits held in 'data' using
|
||||
the 'ks' key schedules. The only difference between the 4 functions is that
|
||||
des_encrypt2() does not perform IP() or FP() on the data (this is an
|
||||
optimization for when doing triple DES and des_encrypt3() and des_decrypt3()
|
||||
perform triple des. The triple DES routines are in here because it does
|
||||
make a big difference to have them located near the des_encrypt2 function
|
||||
at link time..
|
||||
|
||||
Now as we all know, there are lots of different operating systems running on
|
||||
x86 boxes, and unfortunately they normally try to make sure their assembler
|
||||
formating is not the same as the other peoples.
|
||||
The 4 main formats I know of are
|
||||
Microsoft Windows 95/Windows NT
|
||||
Elf Includes Linux and FreeBSD(?).
|
||||
a.out The older Linux.
|
||||
Solaris Same as Elf but different comments :-(.
|
||||
|
||||
Now I was not overly keen to write 4 different copies of the same code,
|
||||
so I wrote a few perl routines to output the correct assembler, given
|
||||
a target assembler type. This code is ugly and is just a hack.
|
||||
The libraries are x86unix.pl and x86ms.pl.
|
||||
des586.pl, des686.pl and des-som[23].pl are the programs to actually
|
||||
generate the assembler.
|
||||
|
||||
So to generate elf assembler
|
||||
perl des-som3.pl elf >dx86-elf.s
|
||||
For Windows 95/NT
|
||||
perl des-som2.pl win32 >win32.asm
|
||||
|
||||
[ update 4 Jan 1996 ]
|
||||
I have added another way to do things.
|
||||
perl des-som3.pl cpp >dx86-cpp.s
|
||||
generates a file that will be included by dx86unix.cpp when it is compiled.
|
||||
To build for elf, a.out, solaris, bsdi etc,
|
||||
cc -E -DELF asm/dx86unix.cpp | as -o asm/dx86-elf.o
|
||||
cc -E -DSOL asm/dx86unix.cpp | as -o asm/dx86-sol.o
|
||||
cc -E -DOUT asm/dx86unix.cpp | as -o asm/dx86-out.o
|
||||
cc -E -DBSDI asm/dx86unix.cpp | as -o asm/dx86bsdi.o
|
||||
This was done to cut down the number of files in the distribution.
|
||||
|
||||
Now the ugly part. I acquired my copy of Intels
|
||||
"Optimization's For Intel's 32-Bit Processors" and found a few interesting
|
||||
things. First, the aim of the exersize is to 'extract' one byte at a time
|
||||
from a word and do an array lookup. This involves getting the byte from
|
||||
the 4 locations in the word and moving it to a new word and doing the lookup.
|
||||
The most obvious way to do this is
|
||||
xor eax, eax # clear word
|
||||
movb al, cl # get low byte
|
||||
xor edi DWORD PTR 0x100+des_SP[eax] # xor in word
|
||||
movb al, ch # get next byte
|
||||
xor edi DWORD PTR 0x300+des_SP[eax] # xor in word
|
||||
shr ecx 16
|
||||
which seems ok. For the pentium, this system appears to be the best.
|
||||
One has to do instruction interleaving to keep both functional units
|
||||
operating, but it is basically very efficient.
|
||||
|
||||
Now the crunch. When a full register is used after a partial write, eg.
|
||||
mov al, cl
|
||||
xor edi, DWORD PTR 0x100+des_SP[eax]
|
||||
386 - 1 cycle stall
|
||||
486 - 1 cycle stall
|
||||
586 - 0 cycle stall
|
||||
686 - at least 7 cycle stall (page 22 of the above mentioned document).
|
||||
|
||||
So the technique that produces the best results on a pentium, according to
|
||||
the documentation, will produce hideous results on a pentium pro.
|
||||
|
||||
To get around this, des686.pl will generate code that is not as fast on
|
||||
a pentium, should be very good on a pentium pro.
|
||||
mov eax, ecx # copy word
|
||||
shr ecx, 8 # line up next byte
|
||||
and eax, 0fch # mask byte
|
||||
xor edi DWORD PTR 0x100+des_SP[eax] # xor in array lookup
|
||||
mov eax, ecx # get word
|
||||
shr ecx 8 # line up next byte
|
||||
and eax, 0fch # mask byte
|
||||
xor edi DWORD PTR 0x300+des_SP[eax] # xor in array lookup
|
||||
|
||||
Due to the execution units in the pentium, this actually works quite well.
|
||||
For a pentium pro it should be very good. This is the type of output
|
||||
Visual C++ generates.
|
||||
|
||||
There is a third option. instead of using
|
||||
mov al, ch
|
||||
which is bad on the pentium pro, one may be able to use
|
||||
movzx eax, ch
|
||||
which may not incur the partial write penalty. On the pentium,
|
||||
this instruction takes 4 cycles so is not worth using but on the
|
||||
pentium pro it appears it may be worth while. I need access to one to
|
||||
experiment :-).
|
||||
|
||||
eric (20 Oct 1996)
|
||||
|
||||
22 Nov 1996 - I have asked people to run the 2 different version on pentium
|
||||
pros and it appears that the intel documentation is wrong. The
|
||||
mov al,bh is still faster on a pentium pro, so just use the des586.pl
|
||||
install des686.pl
|
||||
|
||||
3 Dec 1996 - I added des_encrypt3/des_decrypt3 because I have moved these
|
||||
functions into des_enc.c because it does make a massive performance
|
||||
difference on some boxes to have the functions code located close to
|
||||
the des_encrypt2() function.
|
||||
|
||||
9 Jan 1997 - des-som2.pl is now the correct perl script to use for
|
||||
pentiums. It contains an inner loop from
|
||||
Svend Olaf Mikkelsen <[email protected]> which does raw ecb DES calls at
|
||||
273,000 per second. He had a previous version at 250,000 and the best
|
||||
I was able to get was 203,000. The content has not changed, this is all
|
||||
due to instruction sequencing (and actual instructions choice) which is able
|
||||
to keep both functional units of the pentium going.
|
||||
We may have lost the ugly register usage restrictions when x86 went 32 bit
|
||||
but for the pentium it has been replaced by evil instruction ordering tricks.
|
||||
|
||||
13 Jan 1997 - des-som3.pl, more optimizations from Svend Olaf.
|
||||
raw DES at 281,000 per second on a pentium 100.
|
||||
|
||||
Reference in New Issue
Block a user