1/* $FreeBSD$ */ 2/* $KAME: des_locl.h,v 1.7 2001/09/10 04:03:58 itojun Exp $ */ 3 4/* crypto/des/des_locl.h */ 5/* Copyright (C) 1995-1997 Eric Young (eay@mincom.oz.au) 6 * All rights reserved. 7 * 8 * This file is part of an SSL implementation written 9 * by Eric Young (eay@mincom.oz.au). 10 * The implementation was written so as to conform with Netscapes SSL 11 * specification. This library and applications are 12 * FREE FOR COMMERCIAL AND NON-COMMERCIAL USE 13 * as long as the following conditions are aheared to. 14 * 15 * Copyright remains Eric Young's, and as such any Copyright notices in 16 * the code are not to be removed. If this code is used in a product, 17 * Eric Young should be given attribution as the author of the parts used. 18 * This can be in the form of a textual message at program startup or 19 * in documentation (online or textual) provided with the package. 20 * 21 * Redistribution and use in source and binary forms, with or without 22 * modification, are permitted provided that the following conditions 23 * are met: 24 * 1. Redistributions of source code must retain the copyright 25 * notice, this list of conditions and the following disclaimer. 26 * 2. Redistributions in binary form must reproduce the above copyright 27 * notice, this list of conditions and the following disclaimer in the 28 * documentation and/or other materials provided with the distribution. 29 * 3. All advertising materials mentioning features or use of this software 30 * must display the following acknowledgement: 31 * This product includes software developed by Eric Young (eay@mincom.oz.au) 32 * 33 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND 34 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 35 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 36 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 37 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 38 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 39 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 40 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 41 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 42 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 43 * SUCH DAMAGE. 44 * 45 * The licence and distribution terms for any publically available version or 46 * derivative of this code cannot be changed. i.e. this code cannot simply be 47 * copied and put under another distribution licence 48 * [including the GNU Public Licence.] 49 */ 50 51#ifndef HEADER_DES_LOCL_H 52#define HEADER_DES_LOCL_H 53 54#include <crypto/des/des.h> 55 56#undef DES_PTR 57 58#ifdef __STDC__ 59#undef NOPROTO 60#endif 61 62#define ITERATIONS 16 63#define HALF_ITERATIONS 8 64 65/* used in des_read and des_write */ 66#define MAXWRITE (1024*16) 67#define BSIZE (MAXWRITE+4) 68 69#define c2l(c,l) (l =((DES_LONG)(*((c)++))) , \ 70 l|=((DES_LONG)(*((c)++)))<< 8L, \ 71 l|=((DES_LONG)(*((c)++)))<<16L, \ 72 l|=((DES_LONG)(*((c)++)))<<24L) 73 74/* NOTE - c is not incremented as per c2l */ 75#define c2ln(c,l1,l2,n) { \ 76 c+=n; \ 77 l1=l2=0; \ 78 switch (n) { \ 79 case 8: l2 =((DES_LONG)(*(--(c))))<<24L; \ 80 case 7: l2|=((DES_LONG)(*(--(c))))<<16L; \ 81 case 6: l2|=((DES_LONG)(*(--(c))))<< 8L; \ 82 case 5: l2|=((DES_LONG)(*(--(c)))); \ 83 case 4: l1 =((DES_LONG)(*(--(c))))<<24L; \ 84 case 3: l1|=((DES_LONG)(*(--(c))))<<16L; \ 85 case 2: l1|=((DES_LONG)(*(--(c))))<< 8L; \ 86 case 1: l1|=((DES_LONG)(*(--(c)))); \ 87 } \ 88 } 89 90#define l2c(l,c) (*((c)++)=(unsigned char)(((l) )&0xff), \ 91 *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \ 92 *((c)++)=(unsigned char)(((l)>>16L)&0xff), \ 93 *((c)++)=(unsigned char)(((l)>>24L)&0xff)) 94 95/* replacements for htonl and ntohl since I have no idea what to do 96 * when faced with machines with 8 byte longs. */ 97#define HDRSIZE 4 98 99#define n2l(c,l) (l =((DES_LONG)(*((c)++)))<<24L, \ 100 l|=((DES_LONG)(*((c)++)))<<16L, \ 101 l|=((DES_LONG)(*((c)++)))<< 8L, \ 102 l|=((DES_LONG)(*((c)++)))) 103 104#define l2n(l,c) (*((c)++)=(unsigned char)(((l)>>24L)&0xff), \ 105 *((c)++)=(unsigned char)(((l)>>16L)&0xff), \ 106 *((c)++)=(unsigned char)(((l)>> 8L)&0xff), \ 107 *((c)++)=(unsigned char)(((l) )&0xff)) 108 109/* NOTE - c is not incremented as per l2c */ 110#define l2cn(l1,l2,c,n) { \ 111 c+=n; \ 112 switch (n) { \ 113 case 8: *(--(c))=(unsigned char)(((l2)>>24L)&0xff); \ 114 case 7: *(--(c))=(unsigned char)(((l2)>>16L)&0xff); \ 115 case 6: *(--(c))=(unsigned char)(((l2)>> 8L)&0xff); \ 116 case 5: *(--(c))=(unsigned char)(((l2) )&0xff); \ 117 case 4: *(--(c))=(unsigned char)(((l1)>>24L)&0xff); \ 118 case 3: *(--(c))=(unsigned char)(((l1)>>16L)&0xff); \ 119 case 2: *(--(c))=(unsigned char)(((l1)>> 8L)&0xff); \ 120 case 1: *(--(c))=(unsigned char)(((l1) )&0xff); \ 121 } \ 122 } 123 124#define ROTATE(a,n) (((a)>>(n))+((a)<<(32-(n)))) 125 126#define LOAD_DATA_tmp(a,b,c,d,e,f) LOAD_DATA(a,b,c,d,e,f,g) 127#define LOAD_DATA(R,S,u,t,E0,E1,tmp) \ 128 u=R^s[S ]; \ 129 t=R^s[S+1] 130 131/* The changes to this macro may help or hinder, depending on the 132 * compiler and the achitecture. gcc2 always seems to do well :-). 133 * Inspired by Dana How <how@isl.stanford.edu> 134 * DO NOT use the alternative version on machines with 8 byte longs. 135 * It does not seem to work on the Alpha, even when DES_LONG is 4 136 * bytes, probably an issue of accessing non-word aligned objects :-( */ 137#ifdef DES_PTR 138 139/* It recently occurred to me that 0^0^0^0^0^0^0 == 0, so there 140 * is no reason to not xor all the sub items together. This potentially 141 * saves a register since things can be xored directly into L */ 142 143#if defined(DES_RISC1) || defined(DES_RISC2) 144#ifdef DES_RISC1 145#define D_ENCRYPT(LL,R,S) { \ 146 unsigned int u1,u2,u3; \ 147 LOAD_DATA(R,S,u,t,E0,E1,u1); \ 148 u2=(int)u>>8L; \ 149 u1=(int)u&0xfc; \ 150 u2&=0xfc; \ 151 t=ROTATE(t,4); \ 152 u>>=16L; \ 153 LL^= *(const DES_LONG *)(des_SP +u1); \ 154 LL^= *(const DES_LONG *)(des_SP+0x200+u2); \ 155 u3=(int)(u>>8L); \ 156 u1=(int)u&0xfc; \ 157 u3&=0xfc; \ 158 LL^= *(const DES_LONG *)(des_SP+0x400+u1); \ 159 LL^= *(const DES_LONG *)(des_SP+0x600+u3); \ 160 u2=(int)t>>8L; \ 161 u1=(int)t&0xfc; \ 162 u2&=0xfc; \ 163 t>>=16L; \ 164 LL^= *(const DES_LONG *)(des_SP+0x100+u1); \ 165 LL^= *(const DES_LONG *)(des_SP+0x300+u2); \ 166 u3=(int)t>>8L; \ 167 u1=(int)t&0xfc; \ 168 u3&=0xfc; \ 169 LL^= *(const DES_LONG *)(des_SP+0x500+u1); \ 170 LL^= *(const DES_LONG *)(des_SP+0x700+u3); } 171#endif /* DES_RISC1 */ 172#ifdef DES_RISC2 173#define D_ENCRYPT(LL,R,S) { \ 174 unsigned int u1,u2,s1,s2; \ 175 LOAD_DATA(R,S,u,t,E0,E1,u1); \ 176 u2=(int)u>>8L; \ 177 u1=(int)u&0xfc; \ 178 u2&=0xfc; \ 179 t=ROTATE(t,4); \ 180 LL^= *(const DES_LONG *)(des_SP +u1); \ 181 LL^= *(const DES_LONG *)(des_SP+0x200+u2); \ 182 s1=(int)(u>>16L); \ 183 s2=(int)(u>>24L); \ 184 s1&=0xfc; \ 185 s2&=0xfc; \ 186 LL^= *(const DES_LONG *)(des_SP+0x400+s1); \ 187 LL^= *(const DES_LONG *)(des_SP+0x600+s2); \ 188 u2=(int)t>>8L; \ 189 u1=(int)t&0xfc; \ 190 u2&=0xfc; \ 191 LL^= *(const DES_LONG *)(des_SP+0x100+u1); \ 192 LL^= *(const DES_LONG *)(des_SP+0x300+u2); \ 193 s1=(int)(t>>16L); \ 194 s2=(int)(t>>24L); \ 195 s1&=0xfc; \ 196 s2&=0xfc; \ 197 LL^= *(const DES_LONG *)(des_SP+0x400+s1); \ 198 LL^= *(const DES_LONG *)(des_SP+0x600+s2); \ 199 u2=(int)t>>8L; \ 200 u1=(int)t&0xfc; \ 201 u2&=0xfc; \ 202 LL^= *(const DES_LONG *)(des_SP+0x100+u1); \ 203 LL^= *(const DES_LONG *)(des_SP+0x300+u2); \ 204 s1=(int)(t>>16L); \ 205 s2=(int)(t>>24L); \ 206 s1&=0xfc; \ 207 s2&=0xfc; \ 208 LL^= *(const DES_LONG *)(des_SP+0x500+s1); \ 209 LL^= *(const DES_LONG *)(des_SP+0x700+s2); } 210#endif /* DES_RISC2 */ 211#else /* DES_RISC1 || DES_RISC2 */ 212#define D_ENCRYPT(LL,R,S) { \ 213 LOAD_DATA_tmp(R,S,u,t,E0,E1); \ 214 t=ROTATE(t,4); \ 215 LL^= \ 216 *(const DES_LONG *)(des_SP +((u )&0xfc))^ \ 217 *(const DES_LONG *)(des_SP+0x200+((u>> 8L)&0xfc))^ \ 218 *(const DES_LONG *)(des_SP+0x400+((u>>16L)&0xfc))^ \ 219 *(const DES_LONG *)(des_SP+0x600+((u>>24L)&0xfc))^ \ 220 *(const DES_LONG *)(des_SP+0x100+((t )&0xfc))^ \ 221 *(const DES_LONG *)(des_SP+0x300+((t>> 8L)&0xfc))^ \ 222 *(const DES_LONG *)(des_SP+0x500+((t>>16L)&0xfc))^ \ 223 *(const DES_LONG *)(des_SP+0x700+((t>>24L)&0xfc)); } 224#endif /* DES_RISC1 || DES_RISC2 */ 225#else /* original version */ 226 227#if defined(DES_RISC1) || defined(DES_RISC2) 228#ifdef DES_RISC1 229#define D_ENCRYPT(LL,R,S) {\ 230 unsigned int u1,u2,u3; \ 231 LOAD_DATA(R,S,u,t,E0,E1,u1); \ 232 u>>=2L; \ 233 t=ROTATE(t,6); \ 234 u2=(int)u>>8L; \ 235 u1=(int)u&0x3f; \ 236 u2&=0x3f; \ 237 u>>=16L; \ 238 LL^=des_SPtrans[0][u1]; \ 239 LL^=des_SPtrans[2][u2]; \ 240 u3=(int)u>>8L; \ 241 u1=(int)u&0x3f; \ 242 u3&=0x3f; \ 243 LL^=des_SPtrans[4][u1]; \ 244 LL^=des_SPtrans[6][u3]; \ 245 u2=(int)t>>8L; \ 246 u1=(int)t&0x3f; \ 247 u2&=0x3f; \ 248 t>>=16L; \ 249 LL^=des_SPtrans[1][u1]; \ 250 LL^=des_SPtrans[3][u2]; \ 251 u3=(int)t>>8L; \ 252 u1=(int)t&0x3f; \ 253 u3&=0x3f; \ 254 LL^=des_SPtrans[5][u1]; \ 255 LL^=des_SPtrans[7][u3]; } 256#endif /* DES_RISC1 */ 257#ifdef DES_RISC2 258#define D_ENCRYPT(LL,R,S) {\ 259 unsigned int u1,u2,s1,s2; \ 260 LOAD_DATA(R,S,u,t,E0,E1,u1); \ 261 u>>=2L; \ 262 t=ROTATE(t,6); \ 263 u2=(int)u>>8L; \ 264 u1=(int)u&0x3f; \ 265 u2&=0x3f; \ 266 LL^=des_SPtrans[0][u1]; \ 267 LL^=des_SPtrans[2][u2]; \ 268 s1=(int)u>>16L; \ 269 s2=(int)u>>24L; \ 270 s1&=0x3f; \ 271 s2&=0x3f; \ 272 LL^=des_SPtrans[4][s1]; \ 273 LL^=des_SPtrans[6][s2]; \ 274 u2=(int)t>>8L; \ 275 u1=(int)t&0x3f; \ 276 u2&=0x3f; \ 277 LL^=des_SPtrans[1][u1]; \ 278 LL^=des_SPtrans[3][u2]; \ 279 s1=(int)t>>16; \ 280 s2=(int)t>>24L; \ 281 s1&=0x3f; \ 282 s2&=0x3f; \ 283 LL^=des_SPtrans[5][s1]; \ 284 LL^=des_SPtrans[7][s2]; } 285#endif /* DES_RISC2 */ 286 287#else /* DES_RISC1 || DES_RISC2 */ 288 289#define D_ENCRYPT(LL,R,S) {\ 290 LOAD_DATA_tmp(R,S,u,t,E0,E1); \ 291 t=ROTATE(t,4); \ 292 LL^=\ 293 des_SPtrans[0][(u>> 2L)&0x3f]^ \ 294 des_SPtrans[2][(u>>10L)&0x3f]^ \ 295 des_SPtrans[4][(u>>18L)&0x3f]^ \ 296 des_SPtrans[6][(u>>26L)&0x3f]^ \ 297 des_SPtrans[1][(t>> 2L)&0x3f]^ \ 298 des_SPtrans[3][(t>>10L)&0x3f]^ \ 299 des_SPtrans[5][(t>>18L)&0x3f]^ \ 300 des_SPtrans[7][(t>>26L)&0x3f]; } 301#endif /* DES_RISC1 || DES_RISC2 */ 302#endif /* DES_PTR */ 303 304 /* IP and FP 305 * The problem is more of a geometric problem that random bit fiddling. 306 0 1 2 3 4 5 6 7 62 54 46 38 30 22 14 6 307 8 9 10 11 12 13 14 15 60 52 44 36 28 20 12 4 308 16 17 18 19 20 21 22 23 58 50 42 34 26 18 10 2 309 24 25 26 27 28 29 30 31 to 56 48 40 32 24 16 8 0 310 311 32 33 34 35 36 37 38 39 63 55 47 39 31 23 15 7 312 40 41 42 43 44 45 46 47 61 53 45 37 29 21 13 5 313 48 49 50 51 52 53 54 55 59 51 43 35 27 19 11 3 314 56 57 58 59 60 61 62 63 57 49 41 33 25 17 9 1 315 316 The output has been subject to swaps of the form 317 0 1 -> 3 1 but the odd and even bits have been put into 318 2 3 2 0 319 different words. The main trick is to remember that 320 t=((l>>size)^r)&(mask); 321 r^=t; 322 l^=(t<<size); 323 can be used to swap and move bits between words. 324 325 So l = 0 1 2 3 r = 16 17 18 19 326 4 5 6 7 20 21 22 23 327 8 9 10 11 24 25 26 27 328 12 13 14 15 28 29 30 31 329 becomes (for size == 2 and mask == 0x3333) 330 t = 2^16 3^17 -- -- l = 0 1 16 17 r = 2 3 18 19 331 6^20 7^21 -- -- 4 5 20 21 6 7 22 23 332 10^24 11^25 -- -- 8 9 24 25 10 11 24 25 333 14^28 15^29 -- -- 12 13 28 29 14 15 28 29 334 335 Thanks for hints from Richard Outerbridge - he told me IP&FP 336 could be done in 15 xor, 10 shifts and 5 ands. 337 When I finally started to think of the problem in 2D 338 I first got ~42 operations without xors. When I remembered 339 how to use xors :-) I got it to its final state. 340 */ 341#define PERM_OP(a,b,t,n,m) ((t)=((((a)>>(n))^(b))&(m)),\ 342 (b)^=(t),\ 343 (a)^=((t)<<(n))) 344 345#define IP(l,r) \ 346 { \ 347 register DES_LONG tt; \ 348 PERM_OP(r,l,tt, 4,0x0f0f0f0fL); \ 349 PERM_OP(l,r,tt,16,0x0000ffffL); \ 350 PERM_OP(r,l,tt, 2,0x33333333L); \ 351 PERM_OP(l,r,tt, 8,0x00ff00ffL); \ 352 PERM_OP(r,l,tt, 1,0x55555555L); \ 353 } 354 355#define FP(l,r) \ 356 { \ 357 register DES_LONG tt; \ 358 PERM_OP(l,r,tt, 1,0x55555555L); \ 359 PERM_OP(r,l,tt, 8,0x00ff00ffL); \ 360 PERM_OP(l,r,tt, 2,0x33333333L); \ 361 PERM_OP(r,l,tt,16,0x0000ffffL); \ 362 PERM_OP(l,r,tt, 4,0x0f0f0f0fL); \ 363 } 364#endif 365