des_locl.h revision 296465
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 <openssl/e_os2.h> 63 64# if defined(OPENSSL_SYS_WIN32) || defined(OPENSSL_SYS_WIN16) 65# ifndef OPENSSL_SYS_MSDOS 66# define OPENSSL_SYS_MSDOS 67# endif 68# endif 69 70# include <stdio.h> 71# include <stdlib.h> 72 73# ifndef OPENSSL_SYS_MSDOS 74# if !defined(OPENSSL_SYS_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 OPENSSL_SYS_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(OPENSSL_SYS_VMS) || defined(M_XENIX) || defined(OPENSSL_SYS_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/* 135 * replacements for htonl and ntohl since I have no idea what to do when 136 * faced with machines with 8 byte longs. 137 */ 138# define HDRSIZE 4 139 140# define n2l(c,l) (l =((DES_LONG)(*((c)++)))<<24L, \ 141 l|=((DES_LONG)(*((c)++)))<<16L, \ 142 l|=((DES_LONG)(*((c)++)))<< 8L, \ 143 l|=((DES_LONG)(*((c)++)))) 144 145# define l2n(l,c) (*((c)++)=(unsigned char)(((l)>>24L)&0xff), \ 146 *((c)++)=(unsigned char)(((l)>>16L)&0xff), \ 147 *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \ 148 *((c)++)=(unsigned char)(((l) )&0xff)) 149 150/* NOTE - c is not incremented as per l2c */ 151# define l2cn(l1,l2,c,n) { \ 152 c+=n; \ 153 switch (n) { \ 154 case 8: *(--(c))=(unsigned char)(((l2)>>24L)&0xff); \ 155 case 7: *(--(c))=(unsigned char)(((l2)>>16L)&0xff); \ 156 case 6: *(--(c))=(unsigned char)(((l2)>> 8L)&0xff); \ 157 case 5: *(--(c))=(unsigned char)(((l2) )&0xff); \ 158 case 4: *(--(c))=(unsigned char)(((l1)>>24L)&0xff); \ 159 case 3: *(--(c))=(unsigned char)(((l1)>>16L)&0xff); \ 160 case 2: *(--(c))=(unsigned char)(((l1)>> 8L)&0xff); \ 161 case 1: *(--(c))=(unsigned char)(((l1) )&0xff); \ 162 } \ 163 } 164 165# if (defined(OPENSSL_SYS_WIN32) && defined(_MSC_VER)) || defined(__ICC) 166# define ROTATE(a,n) (_lrotr(a,n)) 167# elif defined(__GNUC__) && __GNUC__>=2 && !defined(__STRICT_ANSI__) && !defined(OPENSSL_NO_ASM) && !defined(OPENSSL_NO_INLINE_ASM) && !defined(PEDANTIC) 168# if defined(__i386) || defined(__i386__) || defined(__x86_64) || defined(__x86_64__) 169# define ROTATE(a,n) ({ register unsigned int ret; \ 170 asm ("rorl %1,%0" \ 171 : "=r"(ret) \ 172 : "I"(n),"0"(a) \ 173 : "cc"); \ 174 ret; \ 175 }) 176# endif 177# endif 178# ifndef ROTATE 179# define ROTATE(a,n) (((a)>>(n))+((a)<<(32-(n)))) 180# endif 181 182/* 183 * Don't worry about the LOAD_DATA() stuff, that is used by fcrypt() to add 184 * it's little bit to the front 185 */ 186 187# ifdef DES_FCRYPT 188 189# define LOAD_DATA_tmp(R,S,u,t,E0,E1) \ 190 { DES_LONG tmp; LOAD_DATA(R,S,u,t,E0,E1,tmp); } 191 192# define LOAD_DATA(R,S,u,t,E0,E1,tmp) \ 193 t=R^(R>>16L); \ 194 u=t&E0; t&=E1; \ 195 tmp=(u<<16); u^=R^s[S ]; u^=tmp; \ 196 tmp=(t<<16); t^=R^s[S+1]; t^=tmp 197# else 198# define LOAD_DATA_tmp(a,b,c,d,e,f) LOAD_DATA(a,b,c,d,e,f,g) 199# define LOAD_DATA(R,S,u,t,E0,E1,tmp) \ 200 u=R^s[S ]; \ 201 t=R^s[S+1] 202# endif 203 204/* 205 * The changes to this macro may help or hinder, depending on the compiler 206 * and the architecture. gcc2 always seems to do well :-). Inspired by Dana 207 * How <how@isl.stanford.edu> DO NOT use the alternative version on machines 208 * with 8 byte longs. It does not seem to work on the Alpha, even when 209 * DES_LONG is 4 bytes, probably an issue of accessing non-word aligned 210 * objects :-( 211 */ 212# ifdef DES_PTR 213 214/* 215 * It recently occurred to me that 0^0^0^0^0^0^0 == 0, so there is no reason 216 * to not xor all the sub items together. This potentially saves a register 217 * since things can be xored directly into L 218 */ 219 220# if defined(DES_RISC1) || defined(DES_RISC2) 221# ifdef DES_RISC1 222# define D_ENCRYPT(LL,R,S) { \ 223 unsigned int u1,u2,u3; \ 224 LOAD_DATA(R,S,u,t,E0,E1,u1); \ 225 u2=(int)u>>8L; \ 226 u1=(int)u&0xfc; \ 227 u2&=0xfc; \ 228 t=ROTATE(t,4); \ 229 u>>=16L; \ 230 LL^= *(const DES_LONG *)(des_SP +u1); \ 231 LL^= *(const DES_LONG *)(des_SP+0x200+u2); \ 232 u3=(int)(u>>8L); \ 233 u1=(int)u&0xfc; \ 234 u3&=0xfc; \ 235 LL^= *(const DES_LONG *)(des_SP+0x400+u1); \ 236 LL^= *(const DES_LONG *)(des_SP+0x600+u3); \ 237 u2=(int)t>>8L; \ 238 u1=(int)t&0xfc; \ 239 u2&=0xfc; \ 240 t>>=16L; \ 241 LL^= *(const DES_LONG *)(des_SP+0x100+u1); \ 242 LL^= *(const DES_LONG *)(des_SP+0x300+u2); \ 243 u3=(int)t>>8L; \ 244 u1=(int)t&0xfc; \ 245 u3&=0xfc; \ 246 LL^= *(const DES_LONG *)(des_SP+0x500+u1); \ 247 LL^= *(const DES_LONG *)(des_SP+0x700+u3); } 248# endif 249# ifdef DES_RISC2 250# define D_ENCRYPT(LL,R,S) { \ 251 unsigned int u1,u2,s1,s2; \ 252 LOAD_DATA(R,S,u,t,E0,E1,u1); \ 253 u2=(int)u>>8L; \ 254 u1=(int)u&0xfc; \ 255 u2&=0xfc; \ 256 t=ROTATE(t,4); \ 257 LL^= *(const DES_LONG *)(des_SP +u1); \ 258 LL^= *(const DES_LONG *)(des_SP+0x200+u2); \ 259 s1=(int)(u>>16L); \ 260 s2=(int)(u>>24L); \ 261 s1&=0xfc; \ 262 s2&=0xfc; \ 263 LL^= *(const DES_LONG *)(des_SP+0x400+s1); \ 264 LL^= *(const DES_LONG *)(des_SP+0x600+s2); \ 265 u2=(int)t>>8L; \ 266 u1=(int)t&0xfc; \ 267 u2&=0xfc; \ 268 LL^= *(const DES_LONG *)(des_SP+0x100+u1); \ 269 LL^= *(const DES_LONG *)(des_SP+0x300+u2); \ 270 s1=(int)(t>>16L); \ 271 s2=(int)(t>>24L); \ 272 s1&=0xfc; \ 273 s2&=0xfc; \ 274 LL^= *(const DES_LONG *)(des_SP+0x500+s1); \ 275 LL^= *(const DES_LONG *)(des_SP+0x700+s2); } 276# endif 277# else 278# define D_ENCRYPT(LL,R,S) { \ 279 LOAD_DATA_tmp(R,S,u,t,E0,E1); \ 280 t=ROTATE(t,4); \ 281 LL^= \ 282 *(const DES_LONG *)(des_SP +((u )&0xfc))^ \ 283 *(const DES_LONG *)(des_SP+0x200+((u>> 8L)&0xfc))^ \ 284 *(const DES_LONG *)(des_SP+0x400+((u>>16L)&0xfc))^ \ 285 *(const DES_LONG *)(des_SP+0x600+((u>>24L)&0xfc))^ \ 286 *(const DES_LONG *)(des_SP+0x100+((t )&0xfc))^ \ 287 *(const DES_LONG *)(des_SP+0x300+((t>> 8L)&0xfc))^ \ 288 *(const DES_LONG *)(des_SP+0x500+((t>>16L)&0xfc))^ \ 289 *(const DES_LONG *)(des_SP+0x700+((t>>24L)&0xfc)); } 290# endif 291 292# else /* original version */ 293 294# if defined(DES_RISC1) || defined(DES_RISC2) 295# ifdef DES_RISC1 296# define D_ENCRYPT(LL,R,S) {\ 297 unsigned int u1,u2,u3; \ 298 LOAD_DATA(R,S,u,t,E0,E1,u1); \ 299 u>>=2L; \ 300 t=ROTATE(t,6); \ 301 u2=(int)u>>8L; \ 302 u1=(int)u&0x3f; \ 303 u2&=0x3f; \ 304 u>>=16L; \ 305 LL^=DES_SPtrans[0][u1]; \ 306 LL^=DES_SPtrans[2][u2]; \ 307 u3=(int)u>>8L; \ 308 u1=(int)u&0x3f; \ 309 u3&=0x3f; \ 310 LL^=DES_SPtrans[4][u1]; \ 311 LL^=DES_SPtrans[6][u3]; \ 312 u2=(int)t>>8L; \ 313 u1=(int)t&0x3f; \ 314 u2&=0x3f; \ 315 t>>=16L; \ 316 LL^=DES_SPtrans[1][u1]; \ 317 LL^=DES_SPtrans[3][u2]; \ 318 u3=(int)t>>8L; \ 319 u1=(int)t&0x3f; \ 320 u3&=0x3f; \ 321 LL^=DES_SPtrans[5][u1]; \ 322 LL^=DES_SPtrans[7][u3]; } 323# endif 324# ifdef DES_RISC2 325# define D_ENCRYPT(LL,R,S) {\ 326 unsigned int u1,u2,s1,s2; \ 327 LOAD_DATA(R,S,u,t,E0,E1,u1); \ 328 u>>=2L; \ 329 t=ROTATE(t,6); \ 330 u2=(int)u>>8L; \ 331 u1=(int)u&0x3f; \ 332 u2&=0x3f; \ 333 LL^=DES_SPtrans[0][u1]; \ 334 LL^=DES_SPtrans[2][u2]; \ 335 s1=(int)u>>16L; \ 336 s2=(int)u>>24L; \ 337 s1&=0x3f; \ 338 s2&=0x3f; \ 339 LL^=DES_SPtrans[4][s1]; \ 340 LL^=DES_SPtrans[6][s2]; \ 341 u2=(int)t>>8L; \ 342 u1=(int)t&0x3f; \ 343 u2&=0x3f; \ 344 LL^=DES_SPtrans[1][u1]; \ 345 LL^=DES_SPtrans[3][u2]; \ 346 s1=(int)t>>16; \ 347 s2=(int)t>>24L; \ 348 s1&=0x3f; \ 349 s2&=0x3f; \ 350 LL^=DES_SPtrans[5][s1]; \ 351 LL^=DES_SPtrans[7][s2]; } 352# endif 353 354# else 355 356# define D_ENCRYPT(LL,R,S) {\ 357 LOAD_DATA_tmp(R,S,u,t,E0,E1); \ 358 t=ROTATE(t,4); \ 359 LL^=\ 360 DES_SPtrans[0][(u>> 2L)&0x3f]^ \ 361 DES_SPtrans[2][(u>>10L)&0x3f]^ \ 362 DES_SPtrans[4][(u>>18L)&0x3f]^ \ 363 DES_SPtrans[6][(u>>26L)&0x3f]^ \ 364 DES_SPtrans[1][(t>> 2L)&0x3f]^ \ 365 DES_SPtrans[3][(t>>10L)&0x3f]^ \ 366 DES_SPtrans[5][(t>>18L)&0x3f]^ \ 367 DES_SPtrans[7][(t>>26L)&0x3f]; } 368# endif 369# endif 370 371 /*- 372 * IP and FP 373 * The problem is more of a geometric problem that random bit fiddling. 374 0 1 2 3 4 5 6 7 62 54 46 38 30 22 14 6 375 8 9 10 11 12 13 14 15 60 52 44 36 28 20 12 4 376 16 17 18 19 20 21 22 23 58 50 42 34 26 18 10 2 377 24 25 26 27 28 29 30 31 to 56 48 40 32 24 16 8 0 378 379 32 33 34 35 36 37 38 39 63 55 47 39 31 23 15 7 380 40 41 42 43 44 45 46 47 61 53 45 37 29 21 13 5 381 48 49 50 51 52 53 54 55 59 51 43 35 27 19 11 3 382 56 57 58 59 60 61 62 63 57 49 41 33 25 17 9 1 383 384 The output has been subject to swaps of the form 385 0 1 -> 3 1 but the odd and even bits have been put into 386 2 3 2 0 387 different words. The main trick is to remember that 388 t=((l>>size)^r)&(mask); 389 r^=t; 390 l^=(t<<size); 391 can be used to swap and move bits between words. 392 393 So l = 0 1 2 3 r = 16 17 18 19 394 4 5 6 7 20 21 22 23 395 8 9 10 11 24 25 26 27 396 12 13 14 15 28 29 30 31 397 becomes (for size == 2 and mask == 0x3333) 398 t = 2^16 3^17 -- -- l = 0 1 16 17 r = 2 3 18 19 399 6^20 7^21 -- -- 4 5 20 21 6 7 22 23 400 10^24 11^25 -- -- 8 9 24 25 10 11 24 25 401 14^28 15^29 -- -- 12 13 28 29 14 15 28 29 402 403 Thanks for hints from Richard Outerbridge - he told me IP&FP 404 could be done in 15 xor, 10 shifts and 5 ands. 405 When I finally started to think of the problem in 2D 406 I first got ~42 operations without xors. When I remembered 407 how to use xors :-) I got it to its final state. 408 */ 409# define PERM_OP(a,b,t,n,m) ((t)=((((a)>>(n))^(b))&(m)),\ 410 (b)^=(t),\ 411 (a)^=((t)<<(n))) 412 413# define IP(l,r) \ 414 { \ 415 register DES_LONG tt; \ 416 PERM_OP(r,l,tt, 4,0x0f0f0f0fL); \ 417 PERM_OP(l,r,tt,16,0x0000ffffL); \ 418 PERM_OP(r,l,tt, 2,0x33333333L); \ 419 PERM_OP(l,r,tt, 8,0x00ff00ffL); \ 420 PERM_OP(r,l,tt, 1,0x55555555L); \ 421 } 422 423# define FP(l,r) \ 424 { \ 425 register DES_LONG tt; \ 426 PERM_OP(l,r,tt, 1,0x55555555L); \ 427 PERM_OP(r,l,tt, 8,0x00ff00ffL); \ 428 PERM_OP(l,r,tt, 2,0x33333333L); \ 429 PERM_OP(r,l,tt,16,0x0000ffffL); \ 430 PERM_OP(l,r,tt, 4,0x0f0f0f0fL); \ 431 } 432 433extern const DES_LONG DES_SPtrans[8][64]; 434 435void fcrypt_body(DES_LONG *out, DES_key_schedule *ks, 436 DES_LONG Eswap0, DES_LONG Eswap1); 437#endif 438