crypto/des/des_locl.h

   1 /* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com)
   2  * All rights reserved.
   3  *
   4  * This package is an SSL implementation written
   5  * by Eric Young (eay@cryptsoft.com).
   6  * The implementation was written so as to conform with Netscapes SSL.
   7  *
   8  * This library is free for commercial and non-commercial use as long as
   9  * the following conditions are aheared to.  The following conditions
  10  * apply to all code found in this distribution, be it the RC4, RSA,
  11  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  12  * included with this distribution is covered by the same copyright terms
  13  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  14  *
  15  * Copyright remains Eric Young's, and as such any Copyright notices in
  16  * the code are not to be removed.
  17  * If this package is used in a product, Eric Young should be given attribution
  18  * as the author of the parts of the library used.
  19  * This can be in the form of a textual message at program startup or
  20  * in documentation (online or textual) provided with the package.
  21  *
  22  * Redistribution and use in source and binary forms, with or without
  23  * modification, are permitted provided that the following conditions
  24  * are met:
  25  * 1. Redistributions of source code must retain the copyright
  26  *    notice, this list of conditions and the following disclaimer.
  27  * 2. Redistributions in binary form must reproduce the above copyright
  28  *    notice, this list of conditions and the following disclaimer in the
  29  *    documentation and/or other materials provided with the distribution.
  30  * 3. All advertising materials mentioning features or use of this software
  31  *    must display the following acknowledgement:
  32  *    "This product includes cryptographic software written by
  33  *     Eric Young (eay@cryptsoft.com)"
  34  *    The word 'cryptographic' can be left out if the rouines from the library
  35  *    being used are not cryptographic related :-).
  36  * 4. If you include any Windows specific code (or a derivative thereof) from
  37  *    the apps directory (application code) you must include an acknowledgement:
  38  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  41  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  43  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  44  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  45  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  46  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  48  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  49  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  50  * SUCH DAMAGE.
  51  *
  52  * The licence and distribution terms for any publically available version or
  53  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  54  * copied and put under another distribution licence
  55  * [including the GNU Public Licence.]
  56  */
  57
  58 #ifndef HEADER_DES_LOCL_H
  59 # define HEADER_DES_LOCL_H
  60
  61 # include <openssl/e_os2.h>
  62
  63 # include "internal/des_conf.h"
  64
  65 # if defined(OPENSSL_SYS_WIN32)
  66 #  ifndef OPENSSL_SYS_MSDOS
  67 #   define OPENSSL_SYS_MSDOS
  68 #  endif
  69 # endif
  70
  71 # include <stdio.h>
  72 # include <stdlib.h>
  73
  74 # ifndef OPENSSL_SYS_MSDOS
  75 #  if !defined(OPENSSL_SYS_VMS) || defined(__DECC)
  76 #   ifdef OPENSSL_UNISTD
  77 #    include OPENSSL_UNISTD
  78 #   else
  79 #    include <unistd.h>
  80 #   endif
  81 #   include <math.h>
  82 #  endif
  83 # endif
  84 # include <openssl/des.h>
  85
  86 # ifdef OPENSSL_SYS_MSDOS       /* Visual C++ 2.1 (Windows NT/95) */
  87 #  include <stdlib.h>
  88 #  include <errno.h>
  89 #  include <time.h>
  90 #  include <io.h>
  91 # endif
  92
  93 # if defined(__STDC__) || defined(OPENSSL_SYS_VMS) || defined(M_XENIX) || defined(OPENSSL_SYS_MSDOS)
  94 #  include <string.h>
  95 # endif
  96
  97 # ifdef OPENSSL_BUILD_SHLIBCRYPTO
  98 #  undef OPENSSL_EXTERN
  99 #  define OPENSSL_EXTERN OPENSSL_EXPORT
 100 # endif
 101
 102 # define ITERATIONS 16
 103 # define HALF_ITERATIONS 8
 104
 105 /* used in des_read and des_write */
 106 # define MAXWRITE        (1024*16)
 107 # define BSIZE           (MAXWRITE+4)
 108
 109 # define c2l(c,l)        (l =((DES_LONG)(*((c)++)))    , \
 110                          l|=((DES_LONG)(*((c)++)))<< 8L, \
 111                          l|=((DES_LONG)(*((c)++)))<<16L, \
 112                          l|=((DES_LONG)(*((c)++)))<<24L)
 113
 114 /* NOTE - c is not incremented as per c2l */
 115 # define c2ln(c,l1,l2,n) { \
 116                         c+=n; \
 117                         l1=l2=0; \
 118                         switch (n) { \
 119                         case 8: l2 =((DES_LONG)(*(--(c))))<<24L; \
 120                         case 7: l2|=((DES_LONG)(*(--(c))))<<16L; \
 121                         case 6: l2|=((DES_LONG)(*(--(c))))<< 8L; \
 122                         case 5: l2|=((DES_LONG)(*(--(c))));     \
 123                         case 4: l1 =((DES_LONG)(*(--(c))))<<24L; \
 124                         case 3: l1|=((DES_LONG)(*(--(c))))<<16L; \
 125                         case 2: l1|=((DES_LONG)(*(--(c))))<< 8L; \
 126                         case 1: l1|=((DES_LONG)(*(--(c))));     \
 127                                 } \
 128                         }
 129
 130 # define l2c(l,c)        (*((c)++)=(unsigned char)(((l)     )&0xff), \
 131                          *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
 132                          *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
 133                          *((c)++)=(unsigned char)(((l)>>24L)&0xff))
 134
 135 /*
 136  * replacements for htonl and ntohl since I have no idea what to do when
 137  * faced with machines with 8 byte longs.
 138  */
 139 # define HDRSIZE 4
 140
 141 # define n2l(c,l)        (l =((DES_LONG)(*((c)++)))<<24L, \
 142                          l|=((DES_LONG)(*((c)++)))<<16L, \
 143                          l|=((DES_LONG)(*((c)++)))<< 8L, \
 144                          l|=((DES_LONG)(*((c)++))))
 145
 146 # define l2n(l,c)        (*((c)++)=(unsigned char)(((l)>>24L)&0xff), \
 147                          *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
 148                          *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
 149                          *((c)++)=(unsigned char)(((l)     )&0xff))
 150
 151 /* NOTE - c is not incremented as per l2c */
 152 # define l2cn(l1,l2,c,n) { \
 153                         c+=n; \
 154                         switch (n) { \
 155                         case 8: *(--(c))=(unsigned char)(((l2)>>24L)&0xff); \
 156                         case 7: *(--(c))=(unsigned char)(((l2)>>16L)&0xff); \
 157                         case 6: *(--(c))=(unsigned char)(((l2)>> 8L)&0xff); \
 158                         case 5: *(--(c))=(unsigned char)(((l2)     )&0xff); \
 159                         case 4: *(--(c))=(unsigned char)(((l1)>>24L)&0xff); \
 160                         case 3: *(--(c))=(unsigned char)(((l1)>>16L)&0xff); \
 161                         case 2: *(--(c))=(unsigned char)(((l1)>> 8L)&0xff); \
 162                         case 1: *(--(c))=(unsigned char)(((l1)     )&0xff); \
 163                                 } \
 164                         }
 165
 166 # if (defined(OPENSSL_SYS_WIN32) && defined(_MSC_VER))
 167 #  define ROTATE(a,n)     (_lrotr(a,n))
 168 # elif defined(__ICC)
 169 #  define ROTATE(a,n)     (_rotr(a,n))
 170 # elif defined(__GNUC__) && __GNUC__>=2 && !defined(__STRICT_ANSI__) && !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_NO_INLINE_ASM) && !defined(PEDANTIC)
 171 #  if defined(__i386) || defined(__i386__) || defined(__x86_64) || defined(__x86_64__)
 172 #   define ROTATE(a,n)   ({ register unsigned int ret;   \
 173                                 asm ("rorl %1,%0"       \
 174                                         : "=r"(ret)     \
 175                                         : "I"(n),"0"(a) \
 176                                         : "cc");        \
 177                            ret;                         \
 178                         })
 179 #  endif
 180 # endif
 181 # ifndef ROTATE
 182 #  define ROTATE(a,n)     (((a)>>(n))+((a)<<(32-(n))))
 183 # endif
 184
 185 /*
 186  * Don't worry about the LOAD_DATA() stuff, that is used by fcrypt() to add
 187  * it's little bit to the front
 188  */
 189
 190 # ifdef DES_FCRYPT
 191
 192 #  define LOAD_DATA_tmp(R,S,u,t,E0,E1) \
 193         { DES_LONG tmp; LOAD_DATA(R,S,u,t,E0,E1,tmp); }
 194
 195 #  define LOAD_DATA(R,S,u,t,E0,E1,tmp) \
 196         t=R^(R>>16L); \
 197         u=t&E0; t&=E1; \
 198         tmp=(u<<16); u^=R^s[S  ]; u^=tmp; \
 199         tmp=(t<<16); t^=R^s[S+1]; t^=tmp
 200 # else
 201 #  define LOAD_DATA_tmp(a,b,c,d,e,f) LOAD_DATA(a,b,c,d,e,f,g)
 202 #  define LOAD_DATA(R,S,u,t,E0,E1,tmp) \
 203         u=R^s[S  ]; \
 204         t=R^s[S+1]
 205 # endif
 206
 207 /*
 208  * The changes to this macro may help or hinder, depending on the compiler
 209  * and the architecture.  gcc2 always seems to do well :-). Inspired by Dana
 210  * How <how@isl.stanford.edu> DO NOT use the alternative version on machines
 211  * with 8 byte longs. It does not seem to work on the Alpha, even when
 212  * DES_LONG is 4 bytes, probably an issue of accessing non-word aligned
 213  * objects :-(
 214  */
 215 # ifdef DES_PTR
 216
 217 /*
 218  * It recently occurred to me that 0^0^0^0^0^0^0 == 0, so there is no reason
 219  * to not xor all the sub items together.  This potentially saves a register
 220  * since things can be xored directly into L
 221  */
 222
 223 #  if defined(DES_RISC1) || defined(DES_RISC2)
 224 #   ifdef DES_RISC1
 225 #    define D_ENCRYPT(LL,R,S) { \
 226         unsigned int u1,u2,u3; \
 227         LOAD_DATA(R,S,u,t,E0,E1,u1); \
 228         u2=(int)u>>8L; \
 229         u1=(int)u&0xfc; \
 230         u2&=0xfc; \
 231         t=ROTATE(t,4); \
 232         u>>=16L; \
 233         LL^= *(const DES_LONG *)(des_SP      +u1); \
 234         LL^= *(const DES_LONG *)(des_SP+0x200+u2); \
 235         u3=(int)(u>>8L); \
 236         u1=(int)u&0xfc; \
 237         u3&=0xfc; \
 238         LL^= *(const DES_LONG *)(des_SP+0x400+u1); \
 239         LL^= *(const DES_LONG *)(des_SP+0x600+u3); \
 240         u2=(int)t>>8L; \
 241         u1=(int)t&0xfc; \
 242         u2&=0xfc; \
 243         t>>=16L; \
 244         LL^= *(const DES_LONG *)(des_SP+0x100+u1); \
 245         LL^= *(const DES_LONG *)(des_SP+0x300+u2); \
 246         u3=(int)t>>8L; \
 247         u1=(int)t&0xfc; \
 248         u3&=0xfc; \
 249         LL^= *(const DES_LONG *)(des_SP+0x500+u1); \
 250         LL^= *(const DES_LONG *)(des_SP+0x700+u3); }
 251 #   endif
 252 #   ifdef DES_RISC2
 253 #    define D_ENCRYPT(LL,R,S) { \
 254         unsigned int u1,u2,s1,s2; \
 255         LOAD_DATA(R,S,u,t,E0,E1,u1); \
 256         u2=(int)u>>8L; \
 257         u1=(int)u&0xfc; \
 258         u2&=0xfc; \
 259         t=ROTATE(t,4); \
 260         LL^= *(const DES_LONG *)(des_SP      +u1); \
 261         LL^= *(const DES_LONG *)(des_SP+0x200+u2); \
 262         s1=(int)(u>>16L); \
 263         s2=(int)(u>>24L); \
 264         s1&=0xfc; \
 265         s2&=0xfc; \
 266         LL^= *(const DES_LONG *)(des_SP+0x400+s1); \
 267         LL^= *(const DES_LONG *)(des_SP+0x600+s2); \
 268         u2=(int)t>>8L; \
 269         u1=(int)t&0xfc; \
 270         u2&=0xfc; \
 271         LL^= *(const DES_LONG *)(des_SP+0x100+u1); \
 272         LL^= *(const DES_LONG *)(des_SP+0x300+u2); \
 273         s1=(int)(t>>16L); \
 274         s2=(int)(t>>24L); \
 275         s1&=0xfc; \
 276         s2&=0xfc; \
 277         LL^= *(const DES_LONG *)(des_SP+0x500+s1); \
 278         LL^= *(const DES_LONG *)(des_SP+0x700+s2); }
 279 #   endif
 280 #  else
 281 #   define D_ENCRYPT(LL,R,S) { \
 282         LOAD_DATA_tmp(R,S,u,t,E0,E1); \
 283         t=ROTATE(t,4); \
 284         LL^= \
 285         *(const DES_LONG *)(des_SP      +((u     )&0xfc))^ \
 286         *(const DES_LONG *)(des_SP+0x200+((u>> 8L)&0xfc))^ \
 287         *(const DES_LONG *)(des_SP+0x400+((u>>16L)&0xfc))^ \
 288         *(const DES_LONG *)(des_SP+0x600+((u>>24L)&0xfc))^ \
 289         *(const DES_LONG *)(des_SP+0x100+((t     )&0xfc))^ \
 290         *(const DES_LONG *)(des_SP+0x300+((t>> 8L)&0xfc))^ \
 291         *(const DES_LONG *)(des_SP+0x500+((t>>16L)&0xfc))^ \
 292         *(const DES_LONG *)(des_SP+0x700+((t>>24L)&0xfc)); }
 293 #  endif
 294
 295 # else                          /* original version */
 296
 297 #  if defined(DES_RISC1) || defined(DES_RISC2)
 298 #   ifdef DES_RISC1
 299 #    define D_ENCRYPT(LL,R,S) {\
 300         unsigned int u1,u2,u3; \
 301         LOAD_DATA(R,S,u,t,E0,E1,u1); \
 302         u>>=2L; \
 303         t=ROTATE(t,6); \
 304         u2=(int)u>>8L; \
 305         u1=(int)u&0x3f; \
 306         u2&=0x3f; \
 307         u>>=16L; \
 308         LL^=DES_SPtrans[0][u1]; \
 309         LL^=DES_SPtrans[2][u2]; \
 310         u3=(int)u>>8L; \
 311         u1=(int)u&0x3f; \
 312         u3&=0x3f; \
 313         LL^=DES_SPtrans[4][u1]; \
 314         LL^=DES_SPtrans[6][u3]; \
 315         u2=(int)t>>8L; \
 316         u1=(int)t&0x3f; \
 317         u2&=0x3f; \
 318         t>>=16L; \
 319         LL^=DES_SPtrans[1][u1]; \
 320         LL^=DES_SPtrans[3][u2]; \
 321         u3=(int)t>>8L; \
 322         u1=(int)t&0x3f; \
 323         u3&=0x3f; \
 324         LL^=DES_SPtrans[5][u1]; \
 325         LL^=DES_SPtrans[7][u3]; }
 326 #   endif
 327 #   ifdef DES_RISC2
 328 #    define D_ENCRYPT(LL,R,S) {\
 329         unsigned int u1,u2,s1,s2; \
 330         LOAD_DATA(R,S,u,t,E0,E1,u1); \
 331         u>>=2L; \
 332         t=ROTATE(t,6); \
 333         u2=(int)u>>8L; \
 334         u1=(int)u&0x3f; \
 335         u2&=0x3f; \
 336         LL^=DES_SPtrans[0][u1]; \
 337         LL^=DES_SPtrans[2][u2]; \
 338         s1=(int)u>>16L; \
 339         s2=(int)u>>24L; \
 340         s1&=0x3f; \
 341         s2&=0x3f; \
 342         LL^=DES_SPtrans[4][s1]; \
 343         LL^=DES_SPtrans[6][s2]; \
 344         u2=(int)t>>8L; \
 345         u1=(int)t&0x3f; \
 346         u2&=0x3f; \
 347         LL^=DES_SPtrans[1][u1]; \
 348         LL^=DES_SPtrans[3][u2]; \
 349         s1=(int)t>>16; \
 350         s2=(int)t>>24L; \
 351         s1&=0x3f; \
 352         s2&=0x3f; \
 353         LL^=DES_SPtrans[5][s1]; \
 354         LL^=DES_SPtrans[7][s2]; }
 355 #   endif
 356
 357 #  else
 358
 359 #   define D_ENCRYPT(LL,R,S) {\
 360         LOAD_DATA_tmp(R,S,u,t,E0,E1); \
 361         t=ROTATE(t,4); \
 362         LL^=\
 363                 DES_SPtrans[0][(u>> 2L)&0x3f]^ \
 364                 DES_SPtrans[2][(u>>10L)&0x3f]^ \
 365                 DES_SPtrans[4][(u>>18L)&0x3f]^ \
 366                 DES_SPtrans[6][(u>>26L)&0x3f]^ \
 367                 DES_SPtrans[1][(t>> 2L)&0x3f]^ \
 368                 DES_SPtrans[3][(t>>10L)&0x3f]^ \
 369                 DES_SPtrans[5][(t>>18L)&0x3f]^ \
 370                 DES_SPtrans[7][(t>>26L)&0x3f]; }
 371 #  endif
 372 # endif
 373
 374         /*-
 375          * IP and FP
 376          * The problem is more of a geometric problem that random bit fiddling.
 377          0  1  2  3  4  5  6  7      62 54 46 38 30 22 14  6
 378          8  9 10 11 12 13 14 15      60 52 44 36 28 20 12  4
 379         16 17 18 19 20 21 22 23      58 50 42 34 26 18 10  2
 380         24 25 26 27 28 29 30 31  to  56 48 40 32 24 16  8  0
 381
 382         32 33 34 35 36 37 38 39      63 55 47 39 31 23 15  7
 383         40 41 42 43 44 45 46 47      61 53 45 37 29 21 13  5
 384         48 49 50 51 52 53 54 55      59 51 43 35 27 19 11  3
 385         56 57 58 59 60 61 62 63      57 49 41 33 25 17  9  1
 386
 387         The output has been subject to swaps of the form
 388         0 1 -> 3 1 but the odd and even bits have been put into
 389         2 3    2 0
 390         different words.  The main trick is to remember that
 391         t=((l>>size)^r)&(mask);
 392         r^=t;
 393         l^=(t<<size);
 394         can be used to swap and move bits between words.
 395
 396         So l =  0  1  2  3  r = 16 17 18 19
 397                 4  5  6  7      20 21 22 23
 398                 8  9 10 11      24 25 26 27
 399                12 13 14 15      28 29 30 31
 400         becomes (for size == 2 and mask == 0x3333)
 401            t =   2^16  3^17 -- --   l =  0  1 16 17  r =  2  3 18 19
 402                  6^20  7^21 -- --        4  5 20 21       6  7 22 23
 403                 10^24 11^25 -- --        8  9 24 25      10 11 24 25
 404                 14^28 15^29 -- --       12 13 28 29      14 15 28 29
 405
 406         Thanks for hints from Richard Outerbridge - he told me IP&FP
 407         could be done in 15 xor, 10 shifts and 5 ands.
 408         When I finally started to think of the problem in 2D
 409         I first got ~42 operations without xors.  When I remembered
 410         how to use xors :-) I got it to its final state.
 411         */
 412 # define PERM_OP(a,b,t,n,m) ((t)=((((a)>>(n))^(b))&(m)),\
 413         (b)^=(t),\
 414         (a)^=((t)<<(n)))
 415
 416 # define IP(l,r) \
 417         { \
 418         register DES_LONG tt; \
 419         PERM_OP(r,l,tt, 4,0x0f0f0f0fL); \
 420         PERM_OP(l,r,tt,16,0x0000ffffL); \
 421         PERM_OP(r,l,tt, 2,0x33333333L); \
 422         PERM_OP(l,r,tt, 8,0x00ff00ffL); \
 423         PERM_OP(r,l,tt, 1,0x55555555L); \
 424         }
 425
 426 # define FP(l,r) \
 427         { \
 428         register DES_LONG tt; \
 429         PERM_OP(l,r,tt, 1,0x55555555L); \
 430         PERM_OP(r,l,tt, 8,0x00ff00ffL); \
 431         PERM_OP(l,r,tt, 2,0x33333333L); \
 432         PERM_OP(r,l,tt,16,0x0000ffffL); \
 433         PERM_OP(l,r,tt, 4,0x0f0f0f0fL); \
 434         }
 435
 436 extern const DES_LONG DES_SPtrans[8][64];
 437
 438 void fcrypt_body(DES_LONG *out, DES_key_schedule *ks,
 439                  DES_LONG Eswap0, DES_LONG Eswap1);
 440
 441 # ifdef OPENSSL_SMALL_FOOTPRINT
 442 #  undef DES_UNROLL
 443 # endif
 444 #endif