crypto/external/bsd/openssl/lib/libdes/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 #include <stdio.h>
  63 #include <stdlib.h>
  64 #include <unistd.h>
  65 #include <math.h>
  66 #include <des.h>
  67 #include <string.h>
  68
  69 #define ITERATIONS 16
  70 #define HALF_ITERATIONS 8
  71
  72 /* used in des_read and des_write */
  73 #define MAXWRITE        (1024*16)
  74 #define BSIZE           (MAXWRITE+4)
  75
  76 #define c2l(c,l)        (l =((DES_LONG)(*((c)++)))    , \
  77                          l|=((DES_LONG)(*((c)++)))<< 8L, \
  78                          l|=((DES_LONG)(*((c)++)))<<16L, \
  79                          l|=((DES_LONG)(*((c)++)))<<24L)
  80
  81 /* NOTE - c is not incremented as per c2l */
  82 #define c2ln(c,l1,l2,n) { \
  83                         c+=n; \
  84                         l1=l2=0; \
  85                         switch (n) { \
  86                         case 8: l2 =((DES_LONG)(*(--(c))))<<24L; \
  87                         case 7: l2|=((DES_LONG)(*(--(c))))<<16L; \
  88                         case 6: l2|=((DES_LONG)(*(--(c))))<< 8L; \
  89                         case 5: l2|=((DES_LONG)(*(--(c))));     \
  90                         case 4: l1 =((DES_LONG)(*(--(c))))<<24L; \
  91                         case 3: l1|=((DES_LONG)(*(--(c))))<<16L; \
  92                         case 2: l1|=((DES_LONG)(*(--(c))))<< 8L; \
  93                         case 1: l1|=((DES_LONG)(*(--(c))));     \
  94                                 } \
  95                         }
  96
  97 #define l2c(l,c)        (*((c)++)=(unsigned char)(((l)     )&0xff), \
  98                          *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
  99                          *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
 100                          *((c)++)=(unsigned char)(((l)>>24L)&0xff))
 101
 102 /* replacements for htonl and ntohl since I have no idea what to do
 103  * when faced with machines with 8 byte longs. */
 104 #define HDRSIZE 4
 105
 106 #define n2l(c,l)        (l =((DES_LONG)(*((c)++)))<<24L, \
 107                          l|=((DES_LONG)(*((c)++)))<<16L, \
 108                          l|=((DES_LONG)(*((c)++)))<< 8L, \
 109                          l|=((DES_LONG)(*((c)++))))
 110
 111 #define l2n(l,c)        (*((c)++)=(unsigned char)(((l)>>24L)&0xff), \
 112                          *((c)++)=(unsigned char)(((l)>>16L)&0xff), \
 113                          *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \
 114                          *((c)++)=(unsigned char)(((l)     )&0xff))
 115
 116 /* NOTE - c is not incremented as per l2c */
 117 #define l2cn(l1,l2,c,n) { \
 118                         c+=n; \
 119                         switch (n) { \
 120                         case 8: *(--(c))=(unsigned char)(((l2)>>24L)&0xff); \
 121                         case 7: *(--(c))=(unsigned char)(((l2)>>16L)&0xff); \
 122                         case 6: *(--(c))=(unsigned char)(((l2)>> 8L)&0xff); \
 123                         case 5: *(--(c))=(unsigned char)(((l2)     )&0xff); \
 124                         case 4: *(--(c))=(unsigned char)(((l1)>>24L)&0xff); \
 125                         case 3: *(--(c))=(unsigned char)(((l1)>>16L)&0xff); \
 126                         case 2: *(--(c))=(unsigned char)(((l1)>> 8L)&0xff); \
 127                         case 1: *(--(c))=(unsigned char)(((l1)     )&0xff); \
 128                                 } \
 129                         }
 130
 131 #define ROTATE(a,n)     (((a)>>(n))+((a)<<(32-(n))))
 132
 133 /* Don't worry about the LOAD_DATA() stuff, that is used by
 134  * fcrypt() to add it's little bit to the front */
 135
 136 #ifdef DES_FCRYPT
 137
 138 #define LOAD_DATA_tmp(R,S,u,t,E0,E1) \
 139         { DES_LONG tmp; LOAD_DATA(R,S,u,t,E0,E1,tmp); }
 140
 141 #define LOAD_DATA(R,S,u,t,E0,E1,tmp) \
 142         t=R^(R>>16L); \
 143         u=t&E0; t&=E1; \
 144         tmp=(u<<16); u^=R^s[S  ]; u^=tmp; \
 145         tmp=(t<<16); t^=R^s[S+1]; t^=tmp
 146 #else
 147 #define LOAD_DATA_tmp(a,b,c,d,e,f) LOAD_DATA(a,b,c,d,e,f,g)
 148 #define LOAD_DATA(R,S,u,t,E0,E1,tmp) \
 149         u=R^s[S  ]; \
 150         t=R^s[S+1]
 151 #endif
 152
 153 /* The changes to this macro may help or hinder, depending on the
 154  * compiler and the architecture.  gcc2 always seems to do well :-).
 155  * Inspired by Dana How <how@isl.stanford.edu>
 156  * DO NOT use the alternative version on machines with 8 byte longs.
 157  * It does not seem to work on the Alpha, even when DES_LONG is 4
 158  * bytes, probably an issue of accessing non-word aligned objects :-( */
 159 #ifdef DES_PTR
 160
 161 /* It recently occurred to me that 0^0^0^0^0^0^0 == 0, so there
 162  * is no reason to not xor all the sub items together.  This potentially
 163  * saves a register since things can be xored directly into L */
 164
 165 #if defined(DES_RISC1) || defined(DES_RISC2)
 166 #ifdef DES_RISC1
 167 #define D_ENCRYPT(LL,R,S) { \
 168         unsigned int u1,u2,u3; \
 169         LOAD_DATA(R,S,u,t,E0,E1,u1); \
 170         u2=(int)u>>8L; \
 171         u1=(int)u&0xfc; \
 172         u2&=0xfc; \
 173         t=ROTATE(t,4); \
 174         u>>=16L; \
 175         LL^= *(const DES_LONG *)(des_SP      +u1); \
 176         LL^= *(const DES_LONG *)(des_SP+0x200+u2); \
 177         u3=(int)(u>>8L); \
 178         u1=(int)u&0xfc; \
 179         u3&=0xfc; \
 180         LL^= *(const DES_LONG *)(des_SP+0x400+u1); \
 181         LL^= *(const DES_LONG *)(des_SP+0x600+u3); \
 182         u2=(int)t>>8L; \
 183         u1=(int)t&0xfc; \
 184         u2&=0xfc; \
 185         t>>=16L; \
 186         LL^= *(const DES_LONG *)(des_SP+0x100+u1); \
 187         LL^= *(const DES_LONG *)(des_SP+0x300+u2); \
 188         u3=(int)t>>8L; \
 189         u1=(int)t&0xfc; \
 190         u3&=0xfc; \
 191         LL^= *(const DES_LONG *)(des_SP+0x500+u1); \
 192         LL^= *(const DES_LONG *)(des_SP+0x700+u3); }
 193 #endif
 194 #ifdef DES_RISC2
 195 #define D_ENCRYPT(LL,R,S) { \
 196         unsigned int u1,u2,s1,s2; \
 197         LOAD_DATA(R,S,u,t,E0,E1,u1); \
 198         u2=(int)u>>8L; \
 199         u1=(int)u&0xfc; \
 200         u2&=0xfc; \
 201         t=ROTATE(t,4); \
 202         LL^= *(const DES_LONG *)(des_SP      +u1); \
 203         LL^= *(const DES_LONG *)(des_SP+0x200+u2); \
 204         s1=(int)(u>>16L); \
 205         s2=(int)(u>>24L); \
 206         s1&=0xfc; \
 207         s2&=0xfc; \
 208         LL^= *(const DES_LONG *)(des_SP+0x400+s1); \
 209         LL^= *(const DES_LONG *)(des_SP+0x600+s2); \
 210         u2=(int)t>>8L; \
 211         u1=(int)t&0xfc; \
 212         u2&=0xfc; \
 213         LL^= *(const DES_LONG *)(des_SP+0x100+u1); \
 214         LL^= *(const DES_LONG *)(des_SP+0x300+u2); \
 215         s1=(int)(t>>16L); \
 216         s2=(int)(t>>24L); \
 217         s1&=0xfc; \
 218         s2&=0xfc; \
 219         LL^= *(const DES_LONG *)(des_SP+0x500+s1); \
 220         LL^= *(const DES_LONG *)(des_SP+0x700+s2); }
 221 #endif
 222 #else
 223 #define D_ENCRYPT(LL,R,S) { \
 224         LOAD_DATA_tmp(R,S,u,t,E0,E1); \
 225         t=ROTATE(t,4); \
 226         LL^= \
 227         *(const DES_LONG *)(des_SP      +((u     )&0xfc))^ \
 228         *(const DES_LONG *)(des_SP+0x200+((u>> 8L)&0xfc))^ \
 229         *(const DES_LONG *)(des_SP+0x400+((u>>16L)&0xfc))^ \
 230         *(const DES_LONG *)(des_SP+0x600+((u>>24L)&0xfc))^ \
 231         *(const DES_LONG *)(des_SP+0x100+((t     )&0xfc))^ \
 232         *(const DES_LONG *)(des_SP+0x300+((t>> 8L)&0xfc))^ \
 233         *(const DES_LONG *)(des_SP+0x500+((t>>16L)&0xfc))^ \
 234         *(const DES_LONG *)(des_SP+0x700+((t>>24L)&0xfc)); }
 235 #endif
 236
 237 #else /* original version */
 238
 239 #if defined(DES_RISC1) || defined(DES_RISC2)
 240 #ifdef DES_RISC1
 241 #define D_ENCRYPT(LL,R,S) {\
 242         unsigned int u1,u2,u3; \
 243         LOAD_DATA(R,S,u,t,E0,E1,u1); \
 244         u>>=2L; \
 245         t=ROTATE(t,6); \
 246         u2=(int)u>>8L; \
 247         u1=(int)u&0x3f; \
 248         u2&=0x3f; \
 249         u>>=16L; \
 250         LL^=des_SPtrans[0][u1]; \
 251         LL^=des_SPtrans[2][u2]; \
 252         u3=(int)u>>8L; \
 253         u1=(int)u&0x3f; \
 254         u3&=0x3f; \
 255         LL^=des_SPtrans[4][u1]; \
 256         LL^=des_SPtrans[6][u3]; \
 257         u2=(int)t>>8L; \
 258         u1=(int)t&0x3f; \
 259         u2&=0x3f; \
 260         t>>=16L; \
 261         LL^=des_SPtrans[1][u1]; \
 262         LL^=des_SPtrans[3][u2]; \
 263         u3=(int)t>>8L; \
 264         u1=(int)t&0x3f; \
 265         u3&=0x3f; \
 266         LL^=des_SPtrans[5][u1]; \
 267         LL^=des_SPtrans[7][u3]; }
 268 #endif
 269 #ifdef DES_RISC2
 270 #define D_ENCRYPT(LL,R,S) {\
 271         unsigned int u1,u2,s1,s2; \
 272         LOAD_DATA(R,S,u,t,E0,E1,u1); \
 273         u>>=2L; \
 274         t=ROTATE(t,6); \
 275         u2=(int)u>>8L; \
 276         u1=(int)u&0x3f; \
 277         u2&=0x3f; \
 278         LL^=des_SPtrans[0][u1]; \
 279         LL^=des_SPtrans[2][u2]; \
 280         s1=(int)u>>16L; \
 281         s2=(int)u>>24L; \
 282         s1&=0x3f; \
 283         s2&=0x3f; \
 284         LL^=des_SPtrans[4][s1]; \
 285         LL^=des_SPtrans[6][s2]; \
 286         u2=(int)t>>8L; \
 287         u1=(int)t&0x3f; \
 288         u2&=0x3f; \
 289         LL^=des_SPtrans[1][u1]; \
 290         LL^=des_SPtrans[3][u2]; \
 291         s1=(int)t>>16; \
 292         s2=(int)t>>24L; \
 293         s1&=0x3f; \
 294         s2&=0x3f; \
 295         LL^=des_SPtrans[5][s1]; \
 296         LL^=des_SPtrans[7][s2]; }
 297 #endif
 298
 299 #else
 300
 301 #define D_ENCRYPT(LL,R,S) {\
 302         LOAD_DATA_tmp(R,S,u,t,E0,E1); \
 303         t=ROTATE(t,4); \
 304         LL^=\
 305                 des_SPtrans[0][(u>> 2L)&0x3f]^ \
 306                 des_SPtrans[2][(u>>10L)&0x3f]^ \
 307                 des_SPtrans[4][(u>>18L)&0x3f]^ \
 308                 des_SPtrans[6][(u>>26L)&0x3f]^ \
 309                 des_SPtrans[1][(t>> 2L)&0x3f]^ \
 310                 des_SPtrans[3][(t>>10L)&0x3f]^ \
 311                 des_SPtrans[5][(t>>18L)&0x3f]^ \
 312                 des_SPtrans[7][(t>>26L)&0x3f]; }
 313 #endif
 314 #endif
 315
 316         /* IP and FP
 317          * The problem is more of a geometric problem that random bit fiddling.
 318          0  1  2  3  4  5  6  7      62 54 46 38 30 22 14  6
 319          8  9 10 11 12 13 14 15      60 52 44 36 28 20 12  4
 320         16 17 18 19 20 21 22 23      58 50 42 34 26 18 10  2
 321         24 25 26 27 28 29 30 31  to  56 48 40 32 24 16  8  0
 322
 323         32 33 34 35 36 37 38 39      63 55 47 39 31 23 15  7
 324         40 41 42 43 44 45 46 47      61 53 45 37 29 21 13  5
 325         48 49 50 51 52 53 54 55      59 51 43 35 27 19 11  3
 326         56 57 58 59 60 61 62 63      57 49 41 33 25 17  9  1
 327
 328         The output has been subject to swaps of the form
 329         0 1 -> 3 1 but the odd and even bits have been put into
 330         2 3    2 0
 331         different words.  The main trick is to remember that
 332         t=((l>>size)^r)&(mask);
 333         r^=t;
 334         l^=(t<<size);
 335         can be used to swap and move bits between words.
 336
 337         So l =  0  1  2  3  r = 16 17 18 19
 338                 4  5  6  7      20 21 22 23
 339                 8  9 10 11      24 25 26 27
 340                12 13 14 15      28 29 30 31
 341         becomes (for size == 2 and mask == 0x3333)
 342            t =   2^16  3^17 -- --   l =  0  1 16 17  r =  2  3 18 19
 343                  6^20  7^21 -- --        4  5 20 21       6  7 22 23
 344                 10^24 11^25 -- --        8  9 24 25      10 11 24 25
 345                 14^28 15^29 -- --       12 13 28 29      14 15 28 29
 346
 347         Thanks for hints from Richard Outerbridge - he told me IP&FP
 348         could be done in 15 xor, 10 shifts and 5 ands.
 349         When I finally started to think of the problem in 2D
 350         I first got ~42 operations without xors.  When I remembered
 351         how to use xors :-) I got it to its final state.
 352         */
 353 #define PERM_OP(a,b,t,n,m) ((t)=((((a)>>(n))^(b))&(m)),\
 354         (b)^=(t),\
 355         (a)^=((t)<<(n)))
 356
 357 #define IP(l,r) \
 358         { \
 359         register DES_LONG tt; \
 360         PERM_OP(r,l,tt, 4,0x0f0f0f0fL); \
 361         PERM_OP(l,r,tt,16,0x0000ffffL); \
 362         PERM_OP(r,l,tt, 2,0x33333333L); \
 363         PERM_OP(l,r,tt, 8,0x00ff00ffL); \
 364         PERM_OP(r,l,tt, 1,0x55555555L); \
 365         }
 366
 367 #define FP(l,r) \
 368         { \
 369         register DES_LONG tt; \
 370         PERM_OP(l,r,tt, 1,0x55555555L); \
 371         PERM_OP(r,l,tt, 8,0x00ff00ffL); \
 372         PERM_OP(l,r,tt, 2,0x33333333L); \
 373         PERM_OP(r,l,tt,16,0x0000ffffL); \
 374         PERM_OP(l,r,tt, 4,0x0f0f0f0fL); \
 375         }
 376
 377 extern const DES_LONG des_SPtrans[8][64];
 378
 379 void fcrypt_body(DES_LONG *out,des_key_schedule ks,
 380         DES_LONG Eswap0, DES_LONG Eswap1);
 381 #endif