crypto/des/des_locl.h

   1 /* crypto/des/des_locl.h */
   2 /* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com)
   3  * All rights reserved.
   4  *
   5  * This package is an SSL implementation written
   6  * by Eric Young (eay@cryptsoft.com).
   7  * The implementation was written so as to conform with Netscapes SSL.
   8  *
   9  * This library is free for commercial and non-commercial use as long as
  10  * the following conditions are aheared to.  The following conditions
  11  * apply to all code found in this distribution, be it the RC4, RSA,
  12  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  13  * included with this distribution is covered by the same copyright terms
  14  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  15  *
  16  * Copyright remains Eric Young's, and as such any Copyright notices in
  17  * the code are not to be removed.
  18  * If this package is used in a product, Eric Young should be given attribution
  19  * as the author of the parts of the library used.
  20  * This can be in the form of a textual message at program startup or
  21  * in documentation (online or textual) provided with the package.
  22  *
  23  * Redistribution and use in source and binary forms, with or without
  24  * modification, are permitted provided that the following conditions
  25  * are met:
  26  * 1. Redistributions of source code must retain the copyright
  27  *    notice, this list of conditions and the following disclaimer.
  28  * 2. Redistributions in binary form must reproduce the above copyright
  29  *    notice, this list of conditions and the following disclaimer in the
  30  *    documentation and/or other materials provided with the distribution.
  31  * 3. All advertising materials mentioning features or use of this software
  32  *    must display the following acknowledgement:
  33  *    "This product includes cryptographic software written by
  34  *     Eric Young (eay@cryptsoft.com)"
  35  *    The word 'cryptographic' can be left out if the rouines from the library
  36  *    being used are not cryptographic related :-).
  37  * 4. If you include any Windows specific code (or a derivative thereof) from
  38  *    the apps directory (application code) you must include an acknowledgement:
  39  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  40  *
  41  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  42  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  43  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  44  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  45  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  46  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  47  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  48  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  49  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  50  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  51  * SUCH DAMAGE.
  52  *
  53  * The licence and distribution terms for any publically available version or
  54  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  55  * copied and put under another distribution licence
  56  * [including the GNU Public Licence.]
  57  */
  58
  59 #ifndef HEADER_DES_LOCL_H
  60 #define HEADER_DES_LOCL_H
  61
  62 #if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_WIN16)
  63 #ifndef MSDOS
  64 #define MSDOS
  65 #endif
  66 #endif
  67
  68 #include <stdio.h>
  69 #include <stdlib.h>
  70
  71 #include <openssl/opensslconf.h>
  72
  73 #ifndef MSDOS
  74 #if !defined(VMS) || defined(__DECC)
  75 #ifdef OPENSSL_UNISTD
  76 # include OPENSSL_UNISTD
  77 #else
  78 # include <unistd.h>
  79 #endif
  80 #include <math.h>
  81 #endif
  82 #endif
  83 #include <openssl/des.h>
  84
  85 #ifdef MSDOS            /* Visual C++ 2.1 (Windows NT/95) */
  86 #include <stdlib.h>
  87 #include <errno.h>
  88 #include <time.h>
  89 #include <io.h>
  90 #endif
  91
  92 #if defined(__STDC__) || defined(VMS) || defined(M_XENIX) || defined(MSDOS)
  93 #include <string.h>
  94 #endif
  95
  96 #ifdef OPENSSL_BUILD_SHLIBCRYPTO
  97 # undef OPENSSL_EXTERN
  98 # define OPENSSL_EXTERN OPENSSL_EXPORT
  99 #endif
 100
 101 #define ITERATIONS 16
 102 #define HALF_ITERATIONS 8
 103
 104 /* used in des_read and des_write */
 105 #define MAXWRITE        (1024*16)
 106 #define BSIZE           (MAXWRITE+4)
 107
 108 #define c2l(c,l)        (l =((DES_LONG)(*((c)++)))    , \
 109                          l|=((DES_LONG)(*((c)++)))<< 8L, \
 110                          l|=((DES_LONG)(*((c)++)))<<16L, \
 111                          l|=((DES_LONG)(*((c)++)))<<24L)
 112
 113 /* NOTE - c is not incremented as per c2l */
 114 #define c2ln(c,l1,l2,n) { \
 115                         c+=n; \
 116                         l1=l2=0; \
 117                         switch (n) { \
 118                         case 8: l2 =((DES_LONG)(*(--(c))))<<24L; \
 119                         case 7: l2|=((DES_LONG)(*(--(c))))<<16L; \
 120                         case 6: l2|=((DES_LONG)(*(--(c))))<< 8L; \
 121                         case 5: l2|=((DES_LONG)(*(--(c))));     \
 122                         case 4: l1 =((DES_LONG)(*(--(c))))<<24L; \
 123                         case 3: l1|=((DES_LONG)(*(--(c))))<<16L; \
 124                         case 2: l1|=((DES_LONG)(*(--(c))))<< 8L; \
 125                         case 1: l1|=((DES_LONG)(*(--(c))));     \
 126                                 } \
 127                         }
 128
 129 #define l2c(l,c)        (*((c)++)=(unsigned char)(((l)     )&0xff), \
 130                          *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
 131                          *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
 132                          *((c)++)=(unsigned char)(((l)>>24L)&0xff))
 133
 134 /* replacements for htonl and ntohl since I have no idea what to do
 135  * when faced with machines with 8 byte longs. */
 136 #define HDRSIZE 4
 137
 138 #define n2l(c,l)        (l =((DES_LONG)(*((c)++)))<<24L, \
 139                          l|=((DES_LONG)(*((c)++)))<<16L, \
 140                          l|=((DES_LONG)(*((c)++)))<< 8L, \
 141                          l|=((DES_LONG)(*((c)++))))
 142
 143 #define l2n(l,c)        (*((c)++)=(unsigned char)(((l)>>24L)&0xff), \
 144                          *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
 145                          *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
 146                          *((c)++)=(unsigned char)(((l)     )&0xff))
 147
 148 /* NOTE - c is not incremented as per l2c */
 149 #define l2cn(l1,l2,c,n) { \
 150                         c+=n; \
 151                         switch (n) { \
 152                         case 8: *(--(c))=(unsigned char)(((l2)>>24L)&0xff); \
 153                         case 7: *(--(c))=(unsigned char)(((l2)>>16L)&0xff); \
 154                         case 6: *(--(c))=(unsigned char)(((l2)>> 8L)&0xff); \
 155                         case 5: *(--(c))=(unsigned char)(((l2)     )&0xff); \
 156                         case 4: *(--(c))=(unsigned char)(((l1)>>24L)&0xff); \
 157                         case 3: *(--(c))=(unsigned char)(((l1)>>16L)&0xff); \
 158                         case 2: *(--(c))=(unsigned char)(((l1)>> 8L)&0xff); \
 159                         case 1: *(--(c))=(unsigned char)(((l1)     )&0xff); \
 160                                 } \
 161                         }
 162
 163 #if defined(OPENSSL_SYS_WIN32) && defined(_MSC_VER)
 164 #define ROTATE(a,n)     (_lrotr(a,n))
 165 #else
 166 #define ROTATE(a,n)     (((a)>>(n))+((a)<<(32-(n))))
 167 #endif
 168
 169 /* Don't worry about the LOAD_DATA() stuff, that is used by
 170  * fcrypt() to add it's little bit to the front */
 171
 172 #ifdef DES_FCRYPT
 173
 174 #define LOAD_DATA_tmp(R,S,u,t,E0,E1) \
 175         { DES_LONG tmp; LOAD_DATA(R,S,u,t,E0,E1,tmp); }
 176
 177 #define LOAD_DATA(R,S,u,t,E0,E1,tmp) \
 178         t=R^(R>>16L); \
 179         u=t&E0; t&=E1; \
 180         tmp=(u<<16); u^=R^s[S  ]; u^=tmp; \
 181         tmp=(t<<16); t^=R^s[S+1]; t^=tmp
 182 #else
 183 #define LOAD_DATA_tmp(a,b,c,d,e,f) LOAD_DATA(a,b,c,d,e,f,g)
 184 #define LOAD_DATA(R,S,u,t,E0,E1,tmp) \
 185         u=R^s[S  ]; \
 186         t=R^s[S+1]
 187 #endif
 188
 189 /* The changes to this macro may help or hinder, depending on the
 190  * compiler and the architecture.  gcc2 always seems to do well :-).
 191  * Inspired by Dana How <how@isl.stanford.edu>
 192  * DO NOT use the alternative version on machines with 8 byte longs.
 193  * It does not seem to work on the Alpha, even when DES_LONG is 4
 194  * bytes, probably an issue of accessing non-word aligned objects :-( */
 195 #ifdef DES_PTR
 196
 197 /* It recently occurred to me that 0^0^0^0^0^0^0 == 0, so there
 198  * is no reason to not xor all the sub items together.  This potentially
 199  * saves a register since things can be xored directly into L */
 200
 201 #if defined(DES_RISC1) || defined(DES_RISC2)
 202 #ifdef DES_RISC1
 203 #define D_ENCRYPT(LL,R,S) { \
 204         unsigned int u1,u2,u3; \
 205         LOAD_DATA(R,S,u,t,E0,E1,u1); \
 206         u2=(int)u>>8L; \
 207         u1=(int)u&0xfc; \
 208         u2&=0xfc; \
 209         t=ROTATE(t,4); \
 210         u>>=16L; \
 211         LL^= *(const DES_LONG *)(des_SP      +u1); \
 212         LL^= *(const DES_LONG *)(des_SP+0x200+u2); \
 213         u3=(int)(u>>8L); \
 214         u1=(int)u&0xfc; \
 215         u3&=0xfc; \
 216         LL^= *(const DES_LONG *)(des_SP+0x400+u1); \
 217         LL^= *(const DES_LONG *)(des_SP+0x600+u3); \
 218         u2=(int)t>>8L; \
 219         u1=(int)t&0xfc; \
 220         u2&=0xfc; \
 221         t>>=16L; \
 222         LL^= *(const DES_LONG *)(des_SP+0x100+u1); \
 223         LL^= *(const DES_LONG *)(des_SP+0x300+u2); \
 224         u3=(int)t>>8L; \
 225         u1=(int)t&0xfc; \
 226         u3&=0xfc; \
 227         LL^= *(const DES_LONG *)(des_SP+0x500+u1); \
 228         LL^= *(const DES_LONG *)(des_SP+0x700+u3); }
 229 #endif
 230 #ifdef DES_RISC2
 231 #define D_ENCRYPT(LL,R,S) { \
 232         unsigned int u1,u2,s1,s2; \
 233         LOAD_DATA(R,S,u,t,E0,E1,u1); \
 234         u2=(int)u>>8L; \
 235         u1=(int)u&0xfc; \
 236         u2&=0xfc; \
 237         t=ROTATE(t,4); \
 238         LL^= *(const DES_LONG *)(des_SP      +u1); \
 239         LL^= *(const DES_LONG *)(des_SP+0x200+u2); \
 240         s1=(int)(u>>16L); \
 241         s2=(int)(u>>24L); \
 242         s1&=0xfc; \
 243         s2&=0xfc; \
 244         LL^= *(const DES_LONG *)(des_SP+0x400+s1); \
 245         LL^= *(const DES_LONG *)(des_SP+0x600+s2); \
 246         u2=(int)t>>8L; \
 247         u1=(int)t&0xfc; \
 248         u2&=0xfc; \
 249         LL^= *(const DES_LONG *)(des_SP+0x100+u1); \
 250         LL^= *(const DES_LONG *)(des_SP+0x300+u2); \
 251         s1=(int)(t>>16L); \
 252         s2=(int)(t>>24L); \
 253         s1&=0xfc; \
 254         s2&=0xfc; \
 255         LL^= *(const DES_LONG *)(des_SP+0x500+s1); \
 256         LL^= *(const DES_LONG *)(des_SP+0x700+s2); }
 257 #endif
 258 #else
 259 #define D_ENCRYPT(LL,R,S) { \
 260         LOAD_DATA_tmp(R,S,u,t,E0,E1); \
 261         t=ROTATE(t,4); \
 262         LL^= \
 263         *(const DES_LONG *)(des_SP      +((u     )&0xfc))^ \
 264         *(const DES_LONG *)(des_SP+0x200+((u>> 8L)&0xfc))^ \
 265         *(const DES_LONG *)(des_SP+0x400+((u>>16L)&0xfc))^ \
 266         *(const DES_LONG *)(des_SP+0x600+((u>>24L)&0xfc))^ \
 267         *(const DES_LONG *)(des_SP+0x100+((t     )&0xfc))^ \
 268         *(const DES_LONG *)(des_SP+0x300+((t>> 8L)&0xfc))^ \
 269         *(const DES_LONG *)(des_SP+0x500+((t>>16L)&0xfc))^ \
 270         *(const DES_LONG *)(des_SP+0x700+((t>>24L)&0xfc)); }
 271 #endif
 272
 273 #else /* original version */
 274
 275 #if defined(DES_RISC1) || defined(DES_RISC2)
 276 #ifdef DES_RISC1
 277 #define D_ENCRYPT(LL,R,S) {\
 278         unsigned int u1,u2,u3; \
 279         LOAD_DATA(R,S,u,t,E0,E1,u1); \
 280         u>>=2L; \
 281         t=ROTATE(t,6); \
 282         u2=(int)u>>8L; \
 283         u1=(int)u&0x3f; \
 284         u2&=0x3f; \
 285         u>>=16L; \
 286         LL^=des_SPtrans[0][u1]; \
 287         LL^=des_SPtrans[2][u2]; \
 288         u3=(int)u>>8L; \
 289         u1=(int)u&0x3f; \
 290         u3&=0x3f; \
 291         LL^=des_SPtrans[4][u1]; \
 292         LL^=des_SPtrans[6][u3]; \
 293         u2=(int)t>>8L; \
 294         u1=(int)t&0x3f; \
 295         u2&=0x3f; \
 296         t>>=16L; \
 297         LL^=des_SPtrans[1][u1]; \
 298         LL^=des_SPtrans[3][u2]; \
 299         u3=(int)t>>8L; \
 300         u1=(int)t&0x3f; \
 301         u3&=0x3f; \
 302         LL^=des_SPtrans[5][u1]; \
 303         LL^=des_SPtrans[7][u3]; }
 304 #endif
 305 #ifdef DES_RISC2
 306 #define D_ENCRYPT(LL,R,S) {\
 307         unsigned int u1,u2,s1,s2; \
 308         LOAD_DATA(R,S,u,t,E0,E1,u1); \
 309         u>>=2L; \
 310         t=ROTATE(t,6); \
 311         u2=(int)u>>8L; \
 312         u1=(int)u&0x3f; \
 313         u2&=0x3f; \
 314         LL^=des_SPtrans[0][u1]; \
 315         LL^=des_SPtrans[2][u2]; \
 316         s1=(int)u>>16L; \
 317         s2=(int)u>>24L; \
 318         s1&=0x3f; \
 319         s2&=0x3f; \
 320         LL^=des_SPtrans[4][s1]; \
 321         LL^=des_SPtrans[6][s2]; \
 322         u2=(int)t>>8L; \
 323         u1=(int)t&0x3f; \
 324         u2&=0x3f; \
 325         LL^=des_SPtrans[1][u1]; \
 326         LL^=des_SPtrans[3][u2]; \
 327         s1=(int)t>>16; \
 328         s2=(int)t>>24L; \
 329         s1&=0x3f; \
 330         s2&=0x3f; \
 331         LL^=des_SPtrans[5][s1]; \
 332         LL^=des_SPtrans[7][s2]; }
 333 #endif
 334
 335 #else
 336
 337 #define D_ENCRYPT(LL,R,S) {\
 338         LOAD_DATA_tmp(R,S,u,t,E0,E1); \
 339         t=ROTATE(t,4); \
 340         LL^=\
 341                 des_SPtrans[0][(u>> 2L)&0x3f]^ \
 342                 des_SPtrans[2][(u>>10L)&0x3f]^ \
 343                 des_SPtrans[4][(u>>18L)&0x3f]^ \
 344                 des_SPtrans[6][(u>>26L)&0x3f]^ \
 345                 des_SPtrans[1][(t>> 2L)&0x3f]^ \
 346                 des_SPtrans[3][(t>>10L)&0x3f]^ \
 347                 des_SPtrans[5][(t>>18L)&0x3f]^ \
 348                 des_SPtrans[7][(t>>26L)&0x3f]; }
 349 #endif
 350 #endif
 351
 352         /* IP and FP
 353          * The problem is more of a geometric problem that random bit fiddling.
 354          0  1  2  3  4  5  6  7      62 54 46 38 30 22 14  6
 355          8  9 10 11 12 13 14 15      60 52 44 36 28 20 12  4
 356         16 17 18 19 20 21 22 23      58 50 42 34 26 18 10  2
 357         24 25 26 27 28 29 30 31  to  56 48 40 32 24 16  8  0
 358
 359         32 33 34 35 36 37 38 39      63 55 47 39 31 23 15  7
 360         40 41 42 43 44 45 46 47      61 53 45 37 29 21 13  5
 361         48 49 50 51 52 53 54 55      59 51 43 35 27 19 11  3
 362         56 57 58 59 60 61 62 63      57 49 41 33 25 17  9  1
 363
 364         The output has been subject to swaps of the form
 365         0 1 -> 3 1 but the odd and even bits have been put into
 366         2 3    2 0
 367         different words.  The main trick is to remember that
 368         t=((l>>size)^r)&(mask);
 369         r^=t;
 370         l^=(t<<size);
 371         can be used to swap and move bits between words.
 372
 373         So l =  0  1  2  3  r = 16 17 18 19
 374                 4  5  6  7      20 21 22 23
 375                 8  9 10 11      24 25 26 27
 376                12 13 14 15      28 29 30 31
 377         becomes (for size == 2 and mask == 0x3333)
 378            t =   2^16  3^17 -- --   l =  0  1 16 17  r =  2  3 18 19
 379                  6^20  7^21 -- --        4  5 20 21       6  7 22 23
 380                 10^24 11^25 -- --        8  9 24 25      10 11 24 25
 381                 14^28 15^29 -- --       12 13 28 29      14 15 28 29
 382
 383         Thanks for hints from Richard Outerbridge - he told me IP&FP
 384         could be done in 15 xor, 10 shifts and 5 ands.
 385         When I finally started to think of the problem in 2D
 386         I first got ~42 operations without xors.  When I remembered
 387         how to use xors :-) I got it to its final state.
 388         */
 389 #define PERM_OP(a,b,t,n,m) ((t)=((((a)>>(n))^(b))&(m)),\
 390         (b)^=(t),\
 391         (a)^=((t)<<(n)))
 392
 393 #define IP(l,r) \
 394         { \
 395         register DES_LONG tt; \
 396         PERM_OP(r,l,tt, 4,0x0f0f0f0fL); \
 397         PERM_OP(l,r,tt,16,0x0000ffffL); \
 398         PERM_OP(r,l,tt, 2,0x33333333L); \
 399         PERM_OP(l,r,tt, 8,0x00ff00ffL); \
 400         PERM_OP(r,l,tt, 1,0x55555555L); \
 401         }
 402
 403 #define FP(l,r) \
 404         { \
 405         register DES_LONG tt; \
 406         PERM_OP(l,r,tt, 1,0x55555555L); \
 407         PERM_OP(r,l,tt, 8,0x00ff00ffL); \
 408         PERM_OP(l,r,tt, 2,0x33333333L); \
 409         PERM_OP(r,l,tt,16,0x0000ffffL); \
 410         PERM_OP(l,r,tt, 4,0x0f0f0f0fL); \
 411         }
 412
 413 OPENSSL_EXTERN const DES_LONG des_SPtrans[8][64];
 414
 415 void fcrypt_body(DES_LONG *out,des_key_schedule ks,
 416         DES_LONG Eswap0, DES_LONG Eswap1);
 417 #endif