crypto/des/asm/des-586.pl

   1 #!/usr/local/bin/perl
   2 #
   3 # The inner loop instruction sequence and the IP/FP modifications are from
   4 # Svend Olaf Mikkelsen <svolaf@inet.uni-c.dk>
   5 #
   6
   7 $0 =~ m/(.*[\/\\])[^\/\\]+$/; $dir=$1;
   8 push(@INC,"${dir}","${dir}../../perlasm");
   9 require "x86asm.pl";
  10 require "cbc.pl";
  11 require "desboth.pl";
  12
  13 # base code is in microsft
  14 # op dest, source
  15 # format.
  16 #
  17
  18 $output=pop;
  19 open STDOUT,">$output";
  20
  21 &asm_init($ARGV[0],"des-586.pl");
  22
  23 $L="edi";
  24 $R="esi";
  25 $trans="ebp";
  26 $small_footprint=1 if (grep(/\-DOPENSSL_SMALL_FOOTPRINT/,@ARGV));
  27 # one can discuss setting this variable to 1 unconditionally, as
  28 # the folded loop is only 3% slower than unrolled, but >7 times smaller
  29
  30 &public_label("DES_SPtrans");
  31 &static_label("des_sptrans");
  32
  33 &DES_encrypt_internal();
  34 &DES_decrypt_internal();
  35 &DES_encrypt("DES_encrypt1",1);
  36 &DES_encrypt("DES_encrypt2",0);
  37 &DES_encrypt3("DES_encrypt3",1);
  38 &DES_encrypt3("DES_decrypt3",0);
  39 &cbc("DES_ncbc_encrypt","DES_encrypt1","DES_encrypt1",0,4,5,3,5,-1);
  40 &cbc("DES_ede3_cbc_encrypt","DES_encrypt3","DES_decrypt3",0,6,7,3,4,5);
  41 &DES_SPtrans();
  42
  43 &asm_finish();
  44
  45 close STDOUT;
  46
  47 sub DES_encrypt_internal()
  48         {
  49         &function_begin_B("_x86_DES_encrypt");
  50
  51         if ($small_footprint)
  52             {
  53             &lea("edx",&DWP(128,"ecx"));
  54             &push("edx");
  55             &push("ecx");
  56             &set_label("eloop");
  57                 &D_ENCRYPT(0,$L,$R,0,$trans,"eax","ebx","ecx","edx",&swtmp(0));
  58                 &comment("");
  59                 &D_ENCRYPT(1,$R,$L,2,$trans,"eax","ebx","ecx","edx",&swtmp(0));
  60                 &comment("");
  61                 &add("ecx",16);
  62                 &cmp("ecx",&swtmp(1));
  63                 &mov(&swtmp(0),"ecx");
  64                 &jb(&label("eloop"));
  65             &add("esp",8);
  66             }
  67         else
  68             {
  69             &push("ecx");
  70             for ($i=0; $i<16; $i+=2)
  71                 {
  72                 &comment("Round $i");
  73                 &D_ENCRYPT($i,$L,$R,$i*2,$trans,"eax","ebx","ecx","edx",&swtmp(0));
  74                 &comment("Round ".sprintf("%d",$i+1));
  75                 &D_ENCRYPT($i+1,$R,$L,($i+1)*2,$trans,"eax","ebx","ecx","edx",&swtmp(0));
  76                 }
  77             &add("esp",4);
  78         }
  79         &ret();
  80
  81         &function_end_B("_x86_DES_encrypt");
  82         }
  83
  84 sub DES_decrypt_internal()
  85         {
  86         &function_begin_B("_x86_DES_decrypt");
  87
  88         if ($small_footprint)
  89             {
  90             &push("ecx");
  91             &lea("ecx",&DWP(128,"ecx"));
  92             &push("ecx");
  93             &set_label("dloop");
  94                 &D_ENCRYPT(0,$L,$R,-2,$trans,"eax","ebx","ecx","edx",&swtmp(0));
  95                 &comment("");
  96                 &D_ENCRYPT(1,$R,$L,-4,$trans,"eax","ebx","ecx","edx",&swtmp(0));
  97                 &comment("");
  98                 &sub("ecx",16);
  99                 &cmp("ecx",&swtmp(1));
 100                 &mov(&swtmp(0),"ecx");
 101                 &ja(&label("dloop"));
 102             &add("esp",8);
 103             }
 104         else
 105             {
 106             &push("ecx");
 107             for ($i=15; $i>0; $i-=2)
 108                 {
 109                 &comment("Round $i");
 110                 &D_ENCRYPT(15-$i,$L,$R,$i*2,$trans,"eax","ebx","ecx","edx",&swtmp(0));
 111                 &comment("Round ".sprintf("%d",$i-1));
 112                 &D_ENCRYPT(15-$i+1,$R,$L,($i-1)*2,$trans,"eax","ebx","ecx","edx",&swtmp(0));
 113                 }
 114             &add("esp",4);
 115             }
 116         &ret();
 117
 118         &function_end_B("_x86_DES_decrypt");
 119         }
 120
 121 sub DES_encrypt
 122         {
 123         local($name,$do_ip)=@_;
 124
 125         &function_begin_B($name);
 126
 127         &push("esi");
 128         &push("edi");
 129
 130         &comment("");
 131         &comment("Load the 2 words");
 132
 133         if ($do_ip)
 134                 {
 135                 &mov($R,&wparam(0));
 136                  &xor(  "ecx",          "ecx"           );
 137
 138                 &push("ebx");
 139                 &push("ebp");
 140
 141                 &mov("eax",&DWP(0,$R,"",0));
 142                  &mov("ebx",&wparam(2));        # get encrypt flag
 143                 &mov($L,&DWP(4,$R,"",0));
 144                 &comment("");
 145                 &comment("IP");
 146                 &IP_new("eax",$L,$R,3);
 147                 }
 148         else
 149                 {
 150                 &mov("eax",&wparam(0));
 151                  &xor(  "ecx",          "ecx"           );
 152
 153                 &push("ebx");
 154                 &push("ebp");
 155
 156                 &mov($R,&DWP(0,"eax","",0));
 157                  &mov("ebx",&wparam(2));        # get encrypt flag
 158                 &rotl($R,3);
 159                 &mov($L,&DWP(4,"eax","",0));
 160                 &rotl($L,3);
 161                 }
 162
 163         # PIC-ification:-)
 164         &call   (&label("pic_point"));
 165         &set_label("pic_point");
 166         &blindpop($trans);
 167         &lea    ($trans,&DWP(&label("des_sptrans")."-".&label("pic_point"),$trans));
 168
 169         &mov(   "ecx",  &wparam(1)      );
 170
 171         &cmp("ebx","0");
 172         &je(&label("decrypt"));
 173         &call("_x86_DES_encrypt");
 174         &jmp(&label("done"));
 175         &set_label("decrypt");
 176         &call("_x86_DES_decrypt");
 177         &set_label("done");
 178
 179         if ($do_ip)
 180                 {
 181                 &comment("");
 182                 &comment("FP");
 183                 &mov("edx",&wparam(0));
 184                 &FP_new($L,$R,"eax",3);
 185
 186                 &mov(&DWP(0,"edx","",0),"eax");
 187                 &mov(&DWP(4,"edx","",0),$R);
 188                 }
 189         else
 190                 {
 191                 &comment("");
 192                 &comment("Fixup");
 193                 &rotr($L,3);            # r
 194                  &mov("eax",&wparam(0));
 195                 &rotr($R,3);            # l
 196                  &mov(&DWP(0,"eax","",0),$L);
 197                  &mov(&DWP(4,"eax","",0),$R);
 198                 }
 199
 200         &pop("ebp");
 201         &pop("ebx");
 202         &pop("edi");
 203         &pop("esi");
 204         &ret();
 205
 206         &function_end_B($name);
 207         }
 208
 209 sub D_ENCRYPT
 210         {
 211         local($r,$L,$R,$S,$trans,$u,$tmp1,$tmp2,$t,$wp1)=@_;
 212
 213          &mov(  $u,             &DWP(&n2a($S*4),$tmp2,"",0));
 214         &xor(   $tmp1,          $tmp1);
 215          &mov(  $t,             &DWP(&n2a(($S+1)*4),$tmp2,"",0));
 216         &xor(   $u,             $R);
 217         &xor(   $tmp2,          $tmp2);
 218          &xor(  $t,             $R);
 219         &and(   $u,             "0xfcfcfcfc"    );
 220          &and(  $t,             "0xcfcfcfcf"    );
 221         &movb(  &LB($tmp1),     &LB($u) );
 222          &movb( &LB($tmp2),     &HB($u) );
 223         &rotr(  $t,             4               );
 224         &xor(   $L,             &DWP("     ",$trans,$tmp1,0));
 225          &movb( &LB($tmp1),     &LB($t) );
 226          &xor(  $L,             &DWP("0x200",$trans,$tmp2,0));
 227          &movb( &LB($tmp2),     &HB($t) );
 228         &shr(   $u,             16);
 229          &xor(  $L,             &DWP("0x100",$trans,$tmp1,0));
 230          &movb( &LB($tmp1),     &HB($u) );
 231         &shr(   $t,             16);
 232          &xor(  $L,             &DWP("0x300",$trans,$tmp2,0));
 233         &movb(  &LB($tmp2),     &HB($t) );
 234          &and(  $u,             "0xff"  );
 235         &and(   $t,             "0xff"  );
 236          &xor(  $L,             &DWP("0x600",$trans,$tmp1,0));
 237          &xor(  $L,             &DWP("0x700",$trans,$tmp2,0));
 238         &mov(   $tmp2,          $wp1    );
 239          &xor(  $L,             &DWP("0x400",$trans,$u,0));
 240          &xor(  $L,             &DWP("0x500",$trans,$t,0));
 241         }
 242
 243 sub n2a
 244         {
 245         sprintf("%d",$_[0]);
 246         }
 247
 248 # now has a side affect of rotating $a by $shift
 249 sub R_PERM_OP
 250         {
 251         local($a,$b,$tt,$shift,$mask,$last)=@_;
 252
 253         &rotl(  $a,             $shift          ) if ($shift != 0);
 254         &mov(   $tt,            $a              );
 255         &xor(   $a,             $b              );
 256         &and(   $a,             $mask           );
 257         # This can never succeed, and besides it is difficult to see what the
 258         # idea was - Ben 13 Feb 99
 259         if (!$last eq $b)
 260                 {
 261                 &xor(   $b,             $a              );
 262                 &xor(   $tt,            $a              );
 263                 }
 264         else
 265                 {
 266                 &xor(   $tt,            $a              );
 267                 &xor(   $b,             $a              );
 268                 }
 269         &comment("");
 270         }
 271
 272 sub IP_new
 273         {
 274         local($l,$r,$tt,$lr)=@_;
 275
 276         &R_PERM_OP($l,$r,$tt, 4,"0xf0f0f0f0",$l);
 277         &R_PERM_OP($r,$tt,$l,20,"0xfff0000f",$l);
 278         &R_PERM_OP($l,$tt,$r,14,"0x33333333",$r);
 279         &R_PERM_OP($tt,$r,$l,22,"0x03fc03fc",$r);
 280         &R_PERM_OP($l,$r,$tt, 9,"0xaaaaaaaa",$r);
 281
 282         if ($lr != 3)
 283                 {
 284                 if (($lr-3) < 0)
 285                         { &rotr($tt,    3-$lr); }
 286                 else    { &rotl($tt,    $lr-3); }
 287                 }
 288         if ($lr != 2)
 289                 {
 290                 if (($lr-2) < 0)
 291                         { &rotr($r,     2-$lr); }
 292                 else    { &rotl($r,     $lr-2); }
 293                 }
 294         }
 295
 296 sub FP_new
 297         {
 298         local($l,$r,$tt,$lr)=@_;
 299
 300         if ($lr != 2)
 301                 {
 302                 if (($lr-2) < 0)
 303                         { &rotl($r,     2-$lr); }
 304                 else    { &rotr($r,     $lr-2); }
 305                 }
 306         if ($lr != 3)
 307                 {
 308                 if (($lr-3) < 0)
 309                         { &rotl($l,     3-$lr); }
 310                 else    { &rotr($l,     $lr-3); }
 311                 }
 312
 313         &R_PERM_OP($l,$r,$tt, 0,"0xaaaaaaaa",$r);
 314         &R_PERM_OP($tt,$r,$l,23,"0x03fc03fc",$r);
 315         &R_PERM_OP($l,$r,$tt,10,"0x33333333",$l);
 316         &R_PERM_OP($r,$tt,$l,18,"0xfff0000f",$l);
 317         &R_PERM_OP($l,$tt,$r,12,"0xf0f0f0f0",$r);
 318         &rotr($tt       , 4);
 319         }
 320
 321 sub DES_SPtrans
 322         {
 323         &set_label("DES_SPtrans",64);
 324         &set_label("des_sptrans");
 325         &data_word(0x02080800, 0x00080000, 0x02000002, 0x02080802);
 326         &data_word(0x02000000, 0x00080802, 0x00080002, 0x02000002);
 327         &data_word(0x00080802, 0x02080800, 0x02080000, 0x00000802);
 328         &data_word(0x02000802, 0x02000000, 0x00000000, 0x00080002);
 329         &data_word(0x00080000, 0x00000002, 0x02000800, 0x00080800);
 330         &data_word(0x02080802, 0x02080000, 0x00000802, 0x02000800);
 331         &data_word(0x00000002, 0x00000800, 0x00080800, 0x02080002);
 332         &data_word(0x00000800, 0x02000802, 0x02080002, 0x00000000);
 333         &data_word(0x00000000, 0x02080802, 0x02000800, 0x00080002);
 334         &data_word(0x02080800, 0x00080000, 0x00000802, 0x02000800);
 335         &data_word(0x02080002, 0x00000800, 0x00080800, 0x02000002);
 336         &data_word(0x00080802, 0x00000002, 0x02000002, 0x02080000);
 337         &data_word(0x02080802, 0x00080800, 0x02080000, 0x02000802);
 338         &data_word(0x02000000, 0x00000802, 0x00080002, 0x00000000);
 339         &data_word(0x00080000, 0x02000000, 0x02000802, 0x02080800);
 340         &data_word(0x00000002, 0x02080002, 0x00000800, 0x00080802);
 341         # nibble 1
 342         &data_word(0x40108010, 0x00000000, 0x00108000, 0x40100000);
 343         &data_word(0x40000010, 0x00008010, 0x40008000, 0x00108000);
 344         &data_word(0x00008000, 0x40100010, 0x00000010, 0x40008000);
 345         &data_word(0x00100010, 0x40108000, 0x40100000, 0x00000010);
 346         &data_word(0x00100000, 0x40008010, 0x40100010, 0x00008000);
 347         &data_word(0x00108010, 0x40000000, 0x00000000, 0x00100010);
 348         &data_word(0x40008010, 0x00108010, 0x40108000, 0x40000010);
 349         &data_word(0x40000000, 0x00100000, 0x00008010, 0x40108010);
 350         &data_word(0x00100010, 0x40108000, 0x40008000, 0x00108010);
 351         &data_word(0x40108010, 0x00100010, 0x40000010, 0x00000000);
 352         &data_word(0x40000000, 0x00008010, 0x00100000, 0x40100010);
 353         &data_word(0x00008000, 0x40000000, 0x00108010, 0x40008010);
 354         &data_word(0x40108000, 0x00008000, 0x00000000, 0x40000010);
 355         &data_word(0x00000010, 0x40108010, 0x00108000, 0x40100000);
 356         &data_word(0x40100010, 0x00100000, 0x00008010, 0x40008000);
 357         &data_word(0x40008010, 0x00000010, 0x40100000, 0x00108000);
 358         # nibble 2
 359         &data_word(0x04000001, 0x04040100, 0x00000100, 0x04000101);
 360         &data_word(0x00040001, 0x04000000, 0x04000101, 0x00040100);
 361         &data_word(0x04000100, 0x00040000, 0x04040000, 0x00000001);
 362         &data_word(0x04040101, 0x00000101, 0x00000001, 0x04040001);
 363         &data_word(0x00000000, 0x00040001, 0x04040100, 0x00000100);
 364         &data_word(0x00000101, 0x04040101, 0x00040000, 0x04000001);
 365         &data_word(0x04040001, 0x04000100, 0x00040101, 0x04040000);
 366         &data_word(0x00040100, 0x00000000, 0x04000000, 0x00040101);
 367         &data_word(0x04040100, 0x00000100, 0x00000001, 0x00040000);
 368         &data_word(0x00000101, 0x00040001, 0x04040000, 0x04000101);
 369         &data_word(0x00000000, 0x04040100, 0x00040100, 0x04040001);
 370         &data_word(0x00040001, 0x04000000, 0x04040101, 0x00000001);
 371         &data_word(0x00040101, 0x04000001, 0x04000000, 0x04040101);
 372         &data_word(0x00040000, 0x04000100, 0x04000101, 0x00040100);
 373         &data_word(0x04000100, 0x00000000, 0x04040001, 0x00000101);
 374         &data_word(0x04000001, 0x00040101, 0x00000100, 0x04040000);
 375         # nibble 3
 376         &data_word(0x00401008, 0x10001000, 0x00000008, 0x10401008);
 377         &data_word(0x00000000, 0x10400000, 0x10001008, 0x00400008);
 378         &data_word(0x10401000, 0x10000008, 0x10000000, 0x00001008);
 379         &data_word(0x10000008, 0x00401008, 0x00400000, 0x10000000);
 380         &data_word(0x10400008, 0x00401000, 0x00001000, 0x00000008);
 381         &data_word(0x00401000, 0x10001008, 0x10400000, 0x00001000);
 382         &data_word(0x00001008, 0x00000000, 0x00400008, 0x10401000);
 383         &data_word(0x10001000, 0x10400008, 0x10401008, 0x00400000);
 384         &data_word(0x10400008, 0x00001008, 0x00400000, 0x10000008);
 385         &data_word(0x00401000, 0x10001000, 0x00000008, 0x10400000);
 386         &data_word(0x10001008, 0x00000000, 0x00001000, 0x00400008);
 387         &data_word(0x00000000, 0x10400008, 0x10401000, 0x00001000);
 388         &data_word(0x10000000, 0x10401008, 0x00401008, 0x00400000);
 389         &data_word(0x10401008, 0x00000008, 0x10001000, 0x00401008);
 390         &data_word(0x00400008, 0x00401000, 0x10400000, 0x10001008);
 391         &data_word(0x00001008, 0x10000000, 0x10000008, 0x10401000);
 392         # nibble 4
 393         &data_word(0x08000000, 0x00010000, 0x00000400, 0x08010420);
 394         &data_word(0x08010020, 0x08000400, 0x00010420, 0x08010000);
 395         &data_word(0x00010000, 0x00000020, 0x08000020, 0x00010400);
 396         &data_word(0x08000420, 0x08010020, 0x08010400, 0x00000000);
 397         &data_word(0x00010400, 0x08000000, 0x00010020, 0x00000420);
 398         &data_word(0x08000400, 0x00010420, 0x00000000, 0x08000020);
 399         &data_word(0x00000020, 0x08000420, 0x08010420, 0x00010020);
 400         &data_word(0x08010000, 0x00000400, 0x00000420, 0x08010400);
 401         &data_word(0x08010400, 0x08000420, 0x00010020, 0x08010000);
 402         &data_word(0x00010000, 0x00000020, 0x08000020, 0x08000400);
 403         &data_word(0x08000000, 0x00010400, 0x08010420, 0x00000000);
 404         &data_word(0x00010420, 0x08000000, 0x00000400, 0x00010020);
 405         &data_word(0x08000420, 0x00000400, 0x00000000, 0x08010420);
 406         &data_word(0x08010020, 0x08010400, 0x00000420, 0x00010000);
 407         &data_word(0x00010400, 0x08010020, 0x08000400, 0x00000420);
 408         &data_word(0x00000020, 0x00010420, 0x08010000, 0x08000020);
 409         # nibble 5
 410         &data_word(0x80000040, 0x00200040, 0x00000000, 0x80202000);
 411         &data_word(0x00200040, 0x00002000, 0x80002040, 0x00200000);
 412         &data_word(0x00002040, 0x80202040, 0x00202000, 0x80000000);
 413         &data_word(0x80002000, 0x80000040, 0x80200000, 0x00202040);
 414         &data_word(0x00200000, 0x80002040, 0x80200040, 0x00000000);
 415         &data_word(0x00002000, 0x00000040, 0x80202000, 0x80200040);
 416         &data_word(0x80202040, 0x80200000, 0x80000000, 0x00002040);
 417         &data_word(0x00000040, 0x00202000, 0x00202040, 0x80002000);
 418         &data_word(0x00002040, 0x80000000, 0x80002000, 0x00202040);
 419         &data_word(0x80202000, 0x00200040, 0x00000000, 0x80002000);
 420         &data_word(0x80000000, 0x00002000, 0x80200040, 0x00200000);
 421         &data_word(0x00200040, 0x80202040, 0x00202000, 0x00000040);
 422         &data_word(0x80202040, 0x00202000, 0x00200000, 0x80002040);
 423         &data_word(0x80000040, 0x80200000, 0x00202040, 0x00000000);
 424         &data_word(0x00002000, 0x80000040, 0x80002040, 0x80202000);
 425         &data_word(0x80200000, 0x00002040, 0x00000040, 0x80200040);
 426         # nibble 6
 427         &data_word(0x00004000, 0x00000200, 0x01000200, 0x01000004);
 428         &data_word(0x01004204, 0x00004004, 0x00004200, 0x00000000);
 429         &data_word(0x01000000, 0x01000204, 0x00000204, 0x01004000);
 430         &data_word(0x00000004, 0x01004200, 0x01004000, 0x00000204);
 431         &data_word(0x01000204, 0x00004000, 0x00004004, 0x01004204);
 432         &data_word(0x00000000, 0x01000200, 0x01000004, 0x00004200);
 433         &data_word(0x01004004, 0x00004204, 0x01004200, 0x00000004);
 434         &data_word(0x00004204, 0x01004004, 0x00000200, 0x01000000);
 435         &data_word(0x00004204, 0x01004000, 0x01004004, 0x00000204);
 436         &data_word(0x00004000, 0x00000200, 0x01000000, 0x01004004);
 437         &data_word(0x01000204, 0x00004204, 0x00004200, 0x00000000);
 438         &data_word(0x00000200, 0x01000004, 0x00000004, 0x01000200);
 439         &data_word(0x00000000, 0x01000204, 0x01000200, 0x00004200);
 440         &data_word(0x00000204, 0x00004000, 0x01004204, 0x01000000);
 441         &data_word(0x01004200, 0x00000004, 0x00004004, 0x01004204);
 442         &data_word(0x01000004, 0x01004200, 0x01004000, 0x00004004);
 443         # nibble 7
 444         &data_word(0x20800080, 0x20820000, 0x00020080, 0x00000000);
 445         &data_word(0x20020000, 0x00800080, 0x20800000, 0x20820080);
 446         &data_word(0x00000080, 0x20000000, 0x00820000, 0x00020080);
 447         &data_word(0x00820080, 0x20020080, 0x20000080, 0x20800000);
 448         &data_word(0x00020000, 0x00820080, 0x00800080, 0x20020000);
 449         &data_word(0x20820080, 0x20000080, 0x00000000, 0x00820000);
 450         &data_word(0x20000000, 0x00800000, 0x20020080, 0x20800080);
 451         &data_word(0x00800000, 0x00020000, 0x20820000, 0x00000080);
 452         &data_word(0x00800000, 0x00020000, 0x20000080, 0x20820080);
 453         &data_word(0x00020080, 0x20000000, 0x00000000, 0x00820000);
 454         &data_word(0x20800080, 0x20020080, 0x20020000, 0x00800080);
 455         &data_word(0x20820000, 0x00000080, 0x00800080, 0x20020000);
 456         &data_word(0x20820080, 0x00800000, 0x20800000, 0x20000080);
 457         &data_word(0x00820000, 0x00020080, 0x20020080, 0x20800000);
 458         &data_word(0x00000080, 0x20820000, 0x00820080, 0x00000000);
 459         &data_word(0x20000000, 0x20800080, 0x00020000, 0x00820080);
 460         }