crypto/des/asm/crypt.pl

   1 #!/usr/local/bin/perl
   2 #\r
   3 # The inner loop instruction sequence and the IP/FP modifications are from\r
   4 # Svend Olaf Mikkelsen <svolaf@inet.uni-c.dk>\r
   5 # I've added the stuff needed for crypt() but I've not worried about making\r
   6 # things perfect.\r
   7 #\r
   8 \r
   9 $prog="crypt.pl";\r
  10 \r
  11 # base code is in microsft\r
  12 # op dest, source\r
  13 # format.\r
  14 #\r
  15 \r
  16 require "desboth.pl";\r
  17 \r
  18 if (    ($ARGV[0] eq "elf"))\r
  19         { require "x86unix.pl"; }\r
  20 elsif ( ($ARGV[0] eq "a.out"))\r
  21         { $aout=1; require "x86unix.pl"; }\r
  22 elsif ( ($ARGV[0] eq "sol"))\r
  23         { $sol=1; require "x86unix.pl"; }\r
  24 elsif ( ($ARGV[0] eq "cpp"))\r
  25         { $cpp=1; require "x86unix.pl"; }\r
  26 elsif ( ($ARGV[0] eq "win32"))\r
  27         { require "x86ms.pl"; }\r
  28 else\r
  29         {\r
  30         print STDERR <<"EOF";\r
  31 Pick one target type from\r
  32         elf     - linux, FreeBSD etc\r
  33         a.out   - old linux\r
  34         sol     - x86 solaris\r
  35         cpp     - format so x86unix.cpp can be used\r
  36         win32   - Windows 95/Windows NT\r
  37 EOF\r
  38         exit(1);\r
  39         }\r
  40 \r
  41 &comment("Don't even think of reading this code");\r
  42 &comment("It was automatically generated by $prog");\r
  43 &comment("Which is a perl program used to generate the x86 assember for");\r
  44 &comment("any of elf, a.out, Win32, or Solaris");\r
  45 &comment("It can be found in SSLeay 0.6.5+ or in libdes 3.26+");\r
  46 &comment("eric <eay\@cryptsoft.com>");\r
  47 &comment("The inner loop instruction sequence and the IP/FP modifications");\r
  48 &comment("are from Svend Olaf Mikkelsen <svolaf\@inet.uni-c.dk>");\r
  49 \r
  50 &comment("");\r
  51 \r
  52 &file("dx86xxxx");\r
  53 \r
  54 $L="edi";\r
  55 $R="esi";\r
  56 \r
  57 &fcrypt_body("fcrypt_body");\r
  58 \r
  59 &file_end();\r
  60 \r
  61 sub fcrypt_body\r
  62         {\r
  63         local($name,$do_ip)=@_;\r
  64 \r
  65         &function_begin($name,3,"EXTRN   _des_SPtrans:DWORD");\r
  66 \r
  67         &comment("");\r
  68         &comment("Load the 2 words");\r
  69         $ks="ebp";\r
  70 \r
  71         &xor(   $L,     $L);\r
  72         &xor(   $R,     $R);\r
  73         &mov($ks,&wparam(1));\r
  74 \r
  75         &mov(&wtmp(1),  25);\r
  76 \r
  77         &set_label("start");\r
  78         for ($i=0; $i<16; $i+=2)\r
  79                 {\r
  80                 &comment("");\r
  81                 &comment("Round $i");\r
  82                 &D_ENCRYPT($i,$L,$R,$i*2,$ks,"des_SPtrans","eax","ebx","ecx","edx");\r
  83 \r
  84                 &comment("");\r
  85                 &comment("Round ".sprintf("%d",$i+1));\r
  86                 &D_ENCRYPT($i+1,$R,$L,($i+1)*2,$ks,"des_SPtrans","eax","ebx","ecx","edx");\r
  87                 }\r
  88         &mov("eax",     $L);\r
  89         &dec(&wtmp(1));\r
  90         &mov($L,        $R);\r
  91         &mov($R,        "eax");\r
  92         &jnz(&label("start"));\r
  93 \r
  94         &comment("");\r
  95         &comment("FP");\r
  96         &mov("edx",&wparam(0));\r
  97 \r
  98         &FP_new($R,$L,"eax",3);\r
  99         &mov(&DWP(0,"edx","",0),"eax");\r
 100         &mov(&DWP(4,"edx","",0),$L);\r
 101 \r
 102         &function_end($name);\r
 103         }\r
 104 \r
 105 sub D_ENCRYPT\r
 106         {\r
 107         local($r,$L,$R,$S,$ks,$desSP,$u,$tmp1,$tmp2,$t)=@_;\r
 108 \r
 109         &mov(   $u,             &wparam(2));                    # 2\r
 110         &mov(   $t,             $R);\r
 111         &shr(   $t,             16);                            # 1\r
 112         &mov(   $tmp2,          &wparam(3));                    # 2\r
 113         &xor(   $t,             $R);                            # 1\r
 114 \r
 115         &and(   $u,             $t);                            # 2\r
 116         &and(   $t,             $tmp2);                         # 2\r
 117 \r
 118         &mov(   $tmp1,          $u);\r
 119         &shl(   $tmp1,          16);                            # 1\r
 120         &mov(   $tmp2,          $t);\r
 121         &shl(   $tmp2,          16);                            # 1\r
 122         &xor(   $u,             $tmp1);                         # 2\r
 123         &xor(   $t,             $tmp2);                         # 2\r
 124         &mov(   $tmp1,          &DWP(&n2a($S*4),$ks,"",0));     # 2\r
 125         &xor(   $u,             $tmp1);\r
 126         &mov(   $tmp2,          &DWP(&n2a(($S+1)*4),$ks,"",0)); # 2\r
 127         &xor(   $u,             $R);\r
 128         &xor(   $t,             $R);\r
 129         &xor(   $t,             $tmp2);\r
 130 \r
 131         &and(   $u,             "0xfcfcfcfc"    );              # 2\r
 132         &xor(   $tmp1,          $tmp1);                         # 1\r
 133         &and(   $t,             "0xcfcfcfcf"    );              # 2\r
 134         &xor(   $tmp2,          $tmp2); \r
 135         &movb(  &LB($tmp1),     &LB($u) );\r
 136         &movb(  &LB($tmp2),     &HB($u) );\r
 137         &rotr(  $t,             4               );\r
 138         &mov(   $ks,            &DWP("      $desSP",$tmp1,"",0));\r
 139         &movb(  &LB($tmp1),     &LB($t) );\r
 140         &xor(   $L,             $ks);\r
 141         &mov(   $ks,            &DWP("0x200+$desSP",$tmp2,"",0));\r
 142         &xor(   $L,             $ks);\r
 143         &movb(  &LB($tmp2),     &HB($t) );\r
 144         &shr(   $u,             16);\r
 145         &mov(   $ks,            &DWP("0x100+$desSP",$tmp1,"",0));\r
 146         &xor(   $L,             $ks); \r
 147         &movb(  &LB($tmp1),     &HB($u) );\r
 148         &shr(   $t,             16);\r
 149         &mov(   $ks,            &DWP("0x300+$desSP",$tmp2,"",0));\r
 150         &xor(   $L,             $ks);\r
 151         &mov(   $ks,            &DWP(24,"esp","",0));\r
 152         &movb(  &LB($tmp2),     &HB($t) );\r
 153         &and(   $u,             "0xff"  );\r
 154         &and(   $t,             "0xff"  );\r
 155         &mov(   $tmp1,          &DWP("0x600+$desSP",$tmp1,"",0));\r
 156         &xor(   $L,             $tmp1);\r
 157         &mov(   $tmp1,          &DWP("0x700+$desSP",$tmp2,"",0));\r
 158         &xor(   $L,             $tmp1);\r
 159         &mov(   $tmp1,          &DWP("0x400+$desSP",$u,"",0));\r
 160         &xor(   $L,             $tmp1);\r
 161         &mov(   $tmp1,          &DWP("0x500+$desSP",$t,"",0));\r
 162         &xor(   $L,             $tmp1);\r
 163         }\r
 164 \r
 165 sub n2a\r
 166         {\r
 167         sprintf("%d",$_[0]);\r
 168         }\r
 169 \r
 170 # now has a side affect of rotating $a by $shift\r
 171 sub R_PERM_OP\r
 172         {\r
 173         local($a,$b,$tt,$shift,$mask,$last)=@_;\r
 174 \r
 175         &rotl(  $a,             $shift          ) if ($shift != 0);\r
 176         &mov(   $tt,            $a              );\r
 177         &xor(   $a,             $b              );\r
 178         &and(   $a,             $mask           );\r
 179         if ($notlast eq $b)\r
 180                 {\r
 181                 &xor(   $b,             $a              );\r
 182                 &xor(   $tt,            $a              );\r
 183                 }\r
 184         else\r
 185                 {\r
 186                 &xor(   $tt,            $a              );\r
 187                 &xor(   $b,             $a              );\r
 188                 }\r
 189         &comment("");\r
 190         }\r
 191 \r
 192 sub IP_new\r
 193         {\r
 194         local($l,$r,$tt,$lr)=@_;\r
 195 \r
 196         &R_PERM_OP($l,$r,$tt, 4,"0xf0f0f0f0",$l);\r
 197         &R_PERM_OP($r,$tt,$l,20,"0xfff0000f",$l);\r
 198         &R_PERM_OP($l,$tt,$r,14,"0x33333333",$r);\r
 199         &R_PERM_OP($tt,$r,$l,22,"0x03fc03fc",$r);\r
 200         &R_PERM_OP($l,$r,$tt, 9,"0xaaaaaaaa",$r);\r
 201         \r
 202         if ($lr != 3)\r
 203                 {\r
 204                 if (($lr-3) < 0)\r
 205                         { &rotr($tt,    3-$lr); }\r
 206                 else    { &rotl($tt,    $lr-3); }\r
 207                 }\r
 208         if ($lr != 2)\r
 209                 {\r
 210                 if (($lr-2) < 0)\r
 211                         { &rotr($r,     2-$lr); }\r
 212                 else    { &rotl($r,     $lr-2); }\r
 213                 }\r
 214         }\r
 215 \r
 216 sub FP_new\r
 217         {\r
 218         local($l,$r,$tt,$lr)=@_;\r
 219 \r
 220         if ($lr != 2)\r
 221                 {\r
 222                 if (($lr-2) < 0)\r
 223                         { &rotl($r,     2-$lr); }\r
 224                 else    { &rotr($r,     $lr-2); }\r
 225                 }\r
 226         if ($lr != 3)\r
 227                 {\r
 228                 if (($lr-3) < 0)\r
 229                         { &rotl($l,     3-$lr); }\r
 230                 else    { &rotr($l,     $lr-3); }\r
 231                 }\r
 232 \r
 233         &R_PERM_OP($l,$r,$tt, 0,"0xaaaaaaaa",$r);\r
 234         &R_PERM_OP($tt,$r,$l,23,"0x03fc03fc",$r);\r
 235         &R_PERM_OP($l,$r,$tt,10,"0x33333333",$l);\r
 236         &R_PERM_OP($r,$tt,$l,18,"0xfff0000f",$l);\r
 237         &R_PERM_OP($l,$tt,$r,12,"0xf0f0f0f0",$r);\r
 238         &rotr($tt       , 4);\r
 239         }\r
 240 \r