crypto/des/asm/des-som3.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 #\r
   6 \r
   7 $prog="des-som3.pl";\r
   8 \r
   9 # base code is in microsft\r
  10 # op dest, source\r
  11 # format.\r
  12 #\r
  13 \r
  14 require "desboth.pl";\r
  15 \r
  16 if (    ($ARGV[0] eq "elf"))\r
  17         { require "x86unix.pl"; }\r
  18 elsif ( ($ARGV[0] eq "a.out"))\r
  19         { $aout=1; require "x86unix.pl"; }\r
  20 elsif ( ($ARGV[0] eq "sol"))\r
  21         { $sol=1; require "x86unix.pl"; }\r
  22 elsif ( ($ARGV[0] eq "cpp"))\r
  23         { $cpp=1; require "x86unix.pl"; }\r
  24 elsif ( ($ARGV[0] eq "win32"))\r
  25         { require "x86ms.pl"; }\r
  26 else\r
  27         {\r
  28         print STDERR <<"EOF";\r
  29 Pick one target type from\r
  30         elf     - linux, FreeBSD etc\r
  31         a.out   - old linux\r
  32         sol     - x86 solaris\r
  33         cpp     - format so x86unix.cpp can be used\r
  34         win32   - Windows 95/Windows NT\r
  35 EOF\r
  36         exit(1);\r
  37         }\r
  38 \r
  39 &comment("Don't even think of reading this code");\r
  40 &comment("It was automatically generated by $prog");\r
  41 &comment("Which is a perl program used to generate the x86 assember for");\r
  42 &comment("any of elf, a.out, Win32, or Solaris");\r
  43 &comment("It can be found in SSLeay 0.6.5+ or in libdes 3.26+");\r
  44 &comment("eric <eay\@cryptsoft.com>");\r
  45 &comment("The inner loop instruction sequence and the IP/FP modifications");\r
  46 &comment("are from Svend Olaf Mikkelsen <svolaf\@inet.uni-c.dk>");\r
  47 \r
  48 &comment("");\r
  49 \r
  50 &file("dx86xxxx");\r
  51 \r
  52 $L="edi";\r
  53 $R="esi";\r
  54 \r
  55 &des_encrypt("des_encrypt",1);\r
  56 &des_encrypt("des_encrypt2",0);\r
  57 \r
  58 &des_encrypt3("des_encrypt3",1);\r
  59 &des_encrypt3("des_decrypt3",0);\r
  60 \r
  61 &file_end();\r
  62 \r
  63 sub des_encrypt\r
  64         {\r
  65         local($name,$do_ip)=@_;\r
  66 \r
  67         &function_begin($name,3,EXTRN   _des_SPtrans:DWORD");\r
  68 \r
  69         &comment("");\r
  70         &comment("Load the 2 words");\r
  71         $ks="ebp";\r
  72 \r
  73         if ($do_ip)\r
  74                 {\r
  75                 &mov($R,&wparam(0));\r
  76                  &xor(  "ecx",          "ecx"           );\r
  77                 &mov("eax",&DWP(0,$R,"",0));\r
  78                  &mov("ebx",&wparam(2));        # get encrypt flag\r
  79                 &mov($L,&DWP(4,$R,"",0));\r
  80                 &comment("");\r
  81                 &comment("IP");\r
  82                 &IP_new("eax",$L,$R,3);\r
  83                 }\r
  84         else\r
  85                 {\r
  86                 &mov("eax",&wparam(0));\r
  87                  &xor(  "ecx",          "ecx"           );\r
  88                 &mov($R,&DWP(0,"eax","",0));\r
  89                  &mov("ebx",&wparam(2));        # get encrypt flag\r
  90                 &rotl($R,3);\r
  91                 &mov($L,&DWP(4,"eax","",0));\r
  92                 &rotl($L,3);\r
  93                 }\r
  94 \r
  95         &cmp("ebx","0");\r
  96         &mov(   $ks,            &wparam(1)      );\r
  97         &je(&label("start_decrypt"));\r
  98 \r
  99         for ($i=0; $i<16; $i+=2)\r
 100                 {\r
 101                 &comment("");\r
 102                 &comment("Round $i");\r
 103                 &D_ENCRYPT($i,$L,$R,$i*2,$ks,"des_SPtrans","eax","ebx","ecx","edx");\r
 104 \r
 105                 &comment("");\r
 106                 &comment("Round ".sprintf("%d",$i+1));\r
 107                 &D_ENCRYPT($i+1,$R,$L,($i+1)*2,$ks,"des_SPtrans","eax","ebx","ecx","edx");\r
 108                 }\r
 109         &jmp(&label("end"));\r
 110 \r
 111         &set_label("start_decrypt");\r
 112 \r
 113         for ($i=15; $i>0; $i-=2)\r
 114                 {\r
 115                 &comment("");\r
 116                 &comment("Round $i");\r
 117                 &D_ENCRYPT(15-$i,$L,$R,$i*2,$ks,"des_SPtrans","eax","ebx","ecx","edx");\r
 118                 &comment("");\r
 119                 &comment("Round ".sprintf("%d",$i-1));\r
 120                 &D_ENCRYPT(15-$i+1,$R,$L,($i-1)*2,$ks,"des_SPtrans","eax","ebx","ecx","edx");\r
 121                 }\r
 122 \r
 123         &set_label("end");\r
 124 \r
 125         if ($do_ip)\r
 126                 {\r
 127                 &comment("");\r
 128                 &comment("FP");\r
 129                 &mov("edx",&wparam(0));\r
 130                 &FP_new($L,$R,"eax",3);\r
 131 \r
 132                 &mov(&DWP(0,"edx","",0),"eax");\r
 133                 &mov(&DWP(4,"edx","",0),$R);\r
 134                 }\r
 135         else\r
 136                 {\r
 137                 &comment("");\r
 138                 &comment("Fixup");\r
 139                 &rotr($L,3);            # r\r
 140                  &mov("eax",&wparam(0));\r
 141                 &rotr($R,3);            # l\r
 142                  &mov(&DWP(0,"eax","",0),$L);\r
 143                  &mov(&DWP(4,"eax","",0),$R);\r
 144                 }\r
 145 \r
 146 \r
 147         &function_end($name);\r
 148         }\r
 149 \r
 150 sub D_ENCRYPT\r
 151         {\r
 152         local($r,$L,$R,$S,$ks,$desSP,$u,$tmp1,$tmp2,$t)=@_;\r
 153 \r
 154         &mov(   $u,             &DWP(&n2a($S*4),$ks,"",0));\r
 155         &xor(   $tmp1,          $tmp1);\r
 156         &mov(   $t,             &DWP(&n2a(($S+1)*4),$ks,"",0));\r
 157         &xor(   $u,             $R);\r
 158         &xor(   $t,             $R);\r
 159         &and(   $u,             "0xfcfcfcfc"    );\r
 160         &and(   $t,             "0xcfcfcfcf"    );\r
 161         &movb(  &LB($tmp1),     &LB($u) );\r
 162         &movb(  &LB($tmp2),     &HB($u) );\r
 163         &rotr(  $t,             4               );\r
 164         &mov(   $ks,            &DWP("      $desSP",$tmp1,"",0));\r
 165         &movb(  &LB($tmp1),     &LB($t) );\r
 166         &xor(   $L,             $ks);\r
 167         &mov(   $ks,            &DWP("0x200+$desSP",$tmp2,"",0));\r
 168         &xor(   $L,             $ks); ######\r
 169         &movb(  &LB($tmp2),     &HB($t) );\r
 170         &shr(   $u,             16);\r
 171         &mov(   $ks,            &DWP("0x100+$desSP",$tmp1,"",0));\r
 172         &xor(   $L,             $ks); ######\r
 173         &movb(  &LB($tmp1),     &HB($u) );\r
 174         &shr(   $t,             16);\r
 175         &mov(   $ks,            &DWP("0x300+$desSP",$tmp2,"",0));\r
 176         &xor(   $L,             $ks);\r
 177         &mov(   $ks,            &DWP(24,"esp","",0)); ####\r
 178         &movb(  &LB($tmp2),     &HB($t) );\r
 179         &and(   $u,             "0xff"  );\r
 180         &and(   $t,             "0xff"  );\r
 181         &mov(   $tmp1,          &DWP("0x600+$desSP",$tmp1,"",0));\r
 182         &xor(   $L,             $tmp1);\r
 183         &mov(   $tmp1,          &DWP("0x700+$desSP",$tmp2,"",0));\r
 184         &xor(   $L,             $tmp1);\r
 185         &mov(   $tmp1,          &DWP("0x400+$desSP",$u,"",0));\r
 186         &xor(   $L,             $tmp1);\r
 187         &mov(   $tmp1,          &DWP("0x500+$desSP",$t,"",0));\r
 188         &xor(   $L,             $tmp1);\r
 189         }\r
 190 \r
 191 sub n2a\r
 192         {\r
 193         sprintf("%d",$_[0]);\r
 194         }\r
 195 \r
 196 # now has a side affect of rotating $a by $shift\r
 197 sub R_PERM_OP\r
 198         {\r
 199         local($a,$b,$tt,$shift,$mask,$last)=@_;\r
 200 \r
 201         &rotl(  $a,             $shift          ) if ($shift != 0);\r
 202         &mov(   $tt,            $a              );\r
 203         &xor(   $a,             $b              );\r
 204         &and(   $a,             $mask           );\r
 205         if ($notlast eq $b)\r
 206                 {\r
 207                 &xor(   $b,             $a              );\r
 208                 &xor(   $tt,            $a              );\r
 209                 }\r
 210         else\r
 211                 {\r
 212                 &xor(   $tt,            $a              );\r
 213                 &xor(   $b,             $a              );\r
 214                 }\r
 215         &comment("");\r
 216         }\r
 217 \r
 218 sub IP_new\r
 219         {\r
 220         local($l,$r,$tt,$lr)=@_;\r
 221 \r
 222         &R_PERM_OP($l,$r,$tt, 4,"0xf0f0f0f0",$l);\r
 223         &R_PERM_OP($r,$tt,$l,20,"0xfff0000f",$l);\r
 224         &R_PERM_OP($l,$tt,$r,14,"0x33333333",$r);\r
 225         &R_PERM_OP($tt,$r,$l,22,"0x03fc03fc",$r);\r
 226         &R_PERM_OP($l,$r,$tt, 9,"0xaaaaaaaa",$r);\r
 227         \r
 228         if ($lr != 3)\r
 229                 {\r
 230                 if (($lr-3) < 0)\r
 231                         { &rotr($tt,    3-$lr); }\r
 232                 else    { &rotl($tt,    $lr-3); }\r
 233                 }\r
 234         if ($lr != 2)\r
 235                 {\r
 236                 if (($lr-2) < 0)\r
 237                         { &rotr($r,     2-$lr); }\r
 238                 else    { &rotl($r,     $lr-2); }\r
 239                 }\r
 240         }\r
 241 \r
 242 sub FP_new\r
 243         {\r
 244         local($l,$r,$tt,$lr)=@_;\r
 245 \r
 246         if ($lr != 2)\r
 247                 {\r
 248                 if (($lr-2) < 0)\r
 249                         { &rotl($r,     2-$lr); }\r
 250                 else    { &rotr($r,     $lr-2); }\r
 251                 }\r
 252         if ($lr != 3)\r
 253                 {\r
 254                 if (($lr-3) < 0)\r
 255                         { &rotl($l,     3-$lr); }\r
 256                 else    { &rotr($l,     $lr-3); }\r
 257                 }\r
 258 \r
 259         &R_PERM_OP($l,$r,$tt, 0,"0xaaaaaaaa",$r);\r
 260         &R_PERM_OP($tt,$r,$l,23,"0x03fc03fc",$r);\r
 261         &R_PERM_OP($l,$r,$tt,10,"0x33333333",$l);\r
 262         &R_PERM_OP($r,$tt,$l,18,"0xfff0000f",$l);\r
 263         &R_PERM_OP($l,$tt,$r,12,"0xf0f0f0f0",$r);\r
 264         &rotr($tt       , 4);\r
 265         }\r
 266 \r