309 lines
6.2 KiB
Raku
309 lines
6.2 KiB
Raku
#!/usr/local/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 <svolaf@inet.uni-c.dk>
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#
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$prog="des-som2.pl";
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# base code is in microsft
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# op dest, source
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# format.
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#
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require "desboth.pl";
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if ( ($ARGV[0] eq "elf"))
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{ require "x86unix.pl"; }
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elsif ( ($ARGV[0] eq "a.out"))
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{ $aout=1; require "x86unix.pl"; }
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elsif ( ($ARGV[0] eq "sol"))
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{ $sol=1; require "x86unix.pl"; }
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elsif ( ($ARGV[0] eq "cpp"))
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{ $cpp=1; require "x86unix.pl"; }
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elsif ( ($ARGV[0] eq "win32"))
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{ require "x86ms.pl"; }
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else
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{
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print STDERR <<"EOF";
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Pick one target type from
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elf - linux, FreeBSD etc
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a.out - old linux
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sol - x86 solaris
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cpp - format so x86unix.cpp can be used
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win32 - Windows 95/Windows NT
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EOF
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exit(1);
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}
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&comment("Don't even think of reading this code");
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&comment("It was automatically generated by $prog");
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&comment("Which is a perl program used to generate the x86 assember for");
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&comment("any of elf, a.out, Win32, or Solaris");
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&comment("It can be found in SSLeay 0.6.5+ or in libdes 3.26+");
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&comment("eric <eay\@mincom.oz.au>");
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&comment("The inner loop instruction sequence and the IP/FP modifications");
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&comment("are from Svend Olaf Mikkelsen <svolaf\@inet.uni-c.dk>");
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&comment("");
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&file("dx86xxxx");
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$L="edi";
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$R="esi";
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&des_encrypt("des_encrypt",1);
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&des_encrypt("des_encrypt2",0);
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&des_encrypt3("des_encrypt3",1);
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&des_encrypt3("des_decrypt3",0);
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&file_end();
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sub des_encrypt
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{
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local($name,$do_ip)=@_;
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&function_begin($name,3);
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&comment("");
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&comment("Load the 2 words");
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&mov("eax",&wparam(0));
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&mov($R,&DWP(0,"eax","",0));
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&mov($L,&DWP(4,"eax","",0));
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if ($do_ip)
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{
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&comment("");
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&comment("IP");
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&IP_new($R,$L,"eax",3);
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# &comment("");
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# &comment("fixup rotate");
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# &rotl($R,3);
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# &rotl($L,3);
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}
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else
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{
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&comment("");
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&comment("fixup rotate");
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&rotl($R,3);
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&rotl($L,3);
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}
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&comment("");
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&comment("load counter, key_schedule and enc flag");
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# encrypting part
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$ks="ebp";
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# &xor( "ebx", "ebx" );
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&mov("eax",&wparam(2)); # get encrypt flag
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&xor( "ecx", "ecx" );
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&cmp("eax","0");
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&mov( $ks, &wparam(1) );
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&je(&label("start_decrypt"));
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for ($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 ($do_ip)
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{
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# &comment("");
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# &comment("Fixup");
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# &rotr($L,3); # r
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# &rotr($R,3); # l
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&comment("");
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&comment("FP");
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&FP_new($R,$L,"eax",3);
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}
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else
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{
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&comment("");
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&comment("Fixup");
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&rotr($L,3); # r
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&rotr($R,3); # l
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}
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&mov("eax",&wparam(0));
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&mov(&DWP(0,"eax","",0),$L);
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&mov(&DWP(4,"eax","",0),$R);
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&function_end($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( $u, &DWP(&n2a($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( $ks, &DWP(24,"esp","",0)); ####
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&movb( &LB($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, $tmp1);
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}
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sub PERM_OP
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{
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local($a,$b,$tt,$shift,$mask)=@_;
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&mov( $tt, $a );
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&shr( $tt, $shift );
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&xor( $tt, $b );
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&and( $tt, $mask );
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&xor( $b, $tt );
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&shl( $tt, $shift );
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&xor( $a, $tt );
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}
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sub IP
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{
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local($l,$r,$tt)=@_;
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&PERM_OP($r,$l,$tt, 4,"0x0f0f0f0f");
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&PERM_OP($l,$r,$tt,16,"0x0000ffff");
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&PERM_OP($r,$l,$tt, 2,"0x33333333");
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&PERM_OP($l,$r,$tt, 8,"0x00ff00ff");
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&PERM_OP($r,$l,$tt, 1,"0x55555555");
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}
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sub FP
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{
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local($l,$r,$tt)=@_;
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&PERM_OP($l,$r,$tt, 1,"0x55555555");
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&PERM_OP($r,$l,$tt, 8,"0x00ff00ff");
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&PERM_OP($l,$r,$tt, 2,"0x33333333");
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&PERM_OP($r,$l,$tt,16,"0x0000ffff");
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&PERM_OP($l,$r,$tt, 4,"0x0f0f0f0f");
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}
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sub n2a
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{
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sprintf("%d",$_[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, $b );
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&xor( $tt, $a );
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&and( $tt, $mask );
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if ($last eq $b)
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{
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&xor( $a, $tt );
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&xor( $b, $tt );
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}
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else
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{
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&xor( $b, $tt );
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&xor( $a, $tt );
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}
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&comment("");
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}
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sub IP_new
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{
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local($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,$l,$tt,20,"0xfff0000f",$l);
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&R_PERM_OP($r,$l,$tt,14,"0x33333333",$r);
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&R_PERM_OP($l,$r,$tt,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 (($lr-3) < 0)
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{ &rotr($l, 3-$lr); }
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else { &rotl($l, $lr-3); }
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}
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if ($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, $lr-2); }
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}
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}
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sub FP_new
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{
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local($r,$l,$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",$r);
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&R_PERM_OP($l,$r,$tt,23,"0x03fc03fc",$r);
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&R_PERM_OP($l,$r,$tt,10,"0x33333333",$l);
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&R_PERM_OP($r,$l,$tt,18,"0xfff0000f",$l);
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&R_PERM_OP($r,$l,$tt,12,"0xf0f0f0f0",$r);
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&rotr($l , 4);
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}
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