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=$1; 8push(@INC,"${dir}","${dir}../../perlasm"); 9require "x86asm.pl"; 10require "cbc.pl"; 11require "desboth.pl"; 12 13# base code is in microsft 14# op dest, source 15# format. 16# 17 18&asm_init($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 42sub 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 79sub 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 116sub 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 204sub 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,$t,0)); 236 } 237 238sub n2a 239 { 240 sprintf("%d",$_[0]); 241 } 242 243# now has a side affect of rotating $a by $shift 244sub R_PERM_OP 245 { 246 local($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, $a ); 263 } 264 &comment(""); 265 } 266 267sub IP_new 268 { 269 local($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, $lr-2); } 288 } 289 } 290 291sub FP_new 292 { 293 local($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 316sub 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 } 456