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