des_enc.c revision 280297
1/* crypto/des/des_enc.c */ 2/* Copyright (C) 1995-1998 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#include "des_locl.h" 60#include "spr.h" 61 62void DES_encrypt1(DES_LONG *data, DES_key_schedule *ks, int enc) 63{ 64 register DES_LONG l, r, t, u; 65#ifdef DES_PTR 66 register const unsigned char *des_SP = (const unsigned char *)DES_SPtrans; 67#endif 68#ifndef DES_UNROLL 69 register int i; 70#endif 71 register DES_LONG *s; 72 73 r = data[0]; 74 l = data[1]; 75 76 IP(r, l); 77 /* 78 * Things have been modified so that the initial rotate is done outside 79 * the loop. This required the DES_SPtrans values in sp.h to be rotated 80 * 1 bit to the right. One perl script later and things have a 5% speed 81 * up on a sparc2. Thanks to Richard Outerbridge 82 * <71755.204@CompuServe.COM> for pointing this out. 83 */ 84 /* clear the top bits on machines with 8byte longs */ 85 /* shift left by 2 */ 86 r = ROTATE(r, 29) & 0xffffffffL; 87 l = ROTATE(l, 29) & 0xffffffffL; 88 89 s = ks->ks->deslong; 90 /* 91 * I don't know if it is worth the effort of loop unrolling the inner 92 * loop 93 */ 94 if (enc) { 95#ifdef DES_UNROLL 96 D_ENCRYPT(l, r, 0); /* 1 */ 97 D_ENCRYPT(r, l, 2); /* 2 */ 98 D_ENCRYPT(l, r, 4); /* 3 */ 99 D_ENCRYPT(r, l, 6); /* 4 */ 100 D_ENCRYPT(l, r, 8); /* 5 */ 101 D_ENCRYPT(r, l, 10); /* 6 */ 102 D_ENCRYPT(l, r, 12); /* 7 */ 103 D_ENCRYPT(r, l, 14); /* 8 */ 104 D_ENCRYPT(l, r, 16); /* 9 */ 105 D_ENCRYPT(r, l, 18); /* 10 */ 106 D_ENCRYPT(l, r, 20); /* 11 */ 107 D_ENCRYPT(r, l, 22); /* 12 */ 108 D_ENCRYPT(l, r, 24); /* 13 */ 109 D_ENCRYPT(r, l, 26); /* 14 */ 110 D_ENCRYPT(l, r, 28); /* 15 */ 111 D_ENCRYPT(r, l, 30); /* 16 */ 112#else 113 for (i = 0; i < 32; i += 4) { 114 D_ENCRYPT(l, r, i + 0); /* 1 */ 115 D_ENCRYPT(r, l, i + 2); /* 2 */ 116 } 117#endif 118 } else { 119#ifdef DES_UNROLL 120 D_ENCRYPT(l, r, 30); /* 16 */ 121 D_ENCRYPT(r, l, 28); /* 15 */ 122 D_ENCRYPT(l, r, 26); /* 14 */ 123 D_ENCRYPT(r, l, 24); /* 13 */ 124 D_ENCRYPT(l, r, 22); /* 12 */ 125 D_ENCRYPT(r, l, 20); /* 11 */ 126 D_ENCRYPT(l, r, 18); /* 10 */ 127 D_ENCRYPT(r, l, 16); /* 9 */ 128 D_ENCRYPT(l, r, 14); /* 8 */ 129 D_ENCRYPT(r, l, 12); /* 7 */ 130 D_ENCRYPT(l, r, 10); /* 6 */ 131 D_ENCRYPT(r, l, 8); /* 5 */ 132 D_ENCRYPT(l, r, 6); /* 4 */ 133 D_ENCRYPT(r, l, 4); /* 3 */ 134 D_ENCRYPT(l, r, 2); /* 2 */ 135 D_ENCRYPT(r, l, 0); /* 1 */ 136#else 137 for (i = 30; i > 0; i -= 4) { 138 D_ENCRYPT(l, r, i - 0); /* 16 */ 139 D_ENCRYPT(r, l, i - 2); /* 15 */ 140 } 141#endif 142 } 143 144 /* rotate and clear the top bits on machines with 8byte longs */ 145 l = ROTATE(l, 3) & 0xffffffffL; 146 r = ROTATE(r, 3) & 0xffffffffL; 147 148 FP(r, l); 149 data[0] = l; 150 data[1] = r; 151 l = r = t = u = 0; 152} 153 154void DES_encrypt2(DES_LONG *data, DES_key_schedule *ks, int enc) 155{ 156 register DES_LONG l, r, t, u; 157#ifdef DES_PTR 158 register const unsigned char *des_SP = (const unsigned char *)DES_SPtrans; 159#endif 160#ifndef DES_UNROLL 161 register int i; 162#endif 163 register DES_LONG *s; 164 165 r = data[0]; 166 l = data[1]; 167 168 /* 169 * Things have been modified so that the initial rotate is done outside 170 * the loop. This required the DES_SPtrans values in sp.h to be rotated 171 * 1 bit to the right. One perl script later and things have a 5% speed 172 * up on a sparc2. Thanks to Richard Outerbridge 173 * <71755.204@CompuServe.COM> for pointing this out. 174 */ 175 /* clear the top bits on machines with 8byte longs */ 176 r = ROTATE(r, 29) & 0xffffffffL; 177 l = ROTATE(l, 29) & 0xffffffffL; 178 179 s = ks->ks->deslong; 180 /* 181 * I don't know if it is worth the effort of loop unrolling the inner 182 * loop 183 */ 184 if (enc) { 185#ifdef DES_UNROLL 186 D_ENCRYPT(l, r, 0); /* 1 */ 187 D_ENCRYPT(r, l, 2); /* 2 */ 188 D_ENCRYPT(l, r, 4); /* 3 */ 189 D_ENCRYPT(r, l, 6); /* 4 */ 190 D_ENCRYPT(l, r, 8); /* 5 */ 191 D_ENCRYPT(r, l, 10); /* 6 */ 192 D_ENCRYPT(l, r, 12); /* 7 */ 193 D_ENCRYPT(r, l, 14); /* 8 */ 194 D_ENCRYPT(l, r, 16); /* 9 */ 195 D_ENCRYPT(r, l, 18); /* 10 */ 196 D_ENCRYPT(l, r, 20); /* 11 */ 197 D_ENCRYPT(r, l, 22); /* 12 */ 198 D_ENCRYPT(l, r, 24); /* 13 */ 199 D_ENCRYPT(r, l, 26); /* 14 */ 200 D_ENCRYPT(l, r, 28); /* 15 */ 201 D_ENCRYPT(r, l, 30); /* 16 */ 202#else 203 for (i = 0; i < 32; i += 4) { 204 D_ENCRYPT(l, r, i + 0); /* 1 */ 205 D_ENCRYPT(r, l, i + 2); /* 2 */ 206 } 207#endif 208 } else { 209#ifdef DES_UNROLL 210 D_ENCRYPT(l, r, 30); /* 16 */ 211 D_ENCRYPT(r, l, 28); /* 15 */ 212 D_ENCRYPT(l, r, 26); /* 14 */ 213 D_ENCRYPT(r, l, 24); /* 13 */ 214 D_ENCRYPT(l, r, 22); /* 12 */ 215 D_ENCRYPT(r, l, 20); /* 11 */ 216 D_ENCRYPT(l, r, 18); /* 10 */ 217 D_ENCRYPT(r, l, 16); /* 9 */ 218 D_ENCRYPT(l, r, 14); /* 8 */ 219 D_ENCRYPT(r, l, 12); /* 7 */ 220 D_ENCRYPT(l, r, 10); /* 6 */ 221 D_ENCRYPT(r, l, 8); /* 5 */ 222 D_ENCRYPT(l, r, 6); /* 4 */ 223 D_ENCRYPT(r, l, 4); /* 3 */ 224 D_ENCRYPT(l, r, 2); /* 2 */ 225 D_ENCRYPT(r, l, 0); /* 1 */ 226#else 227 for (i = 30; i > 0; i -= 4) { 228 D_ENCRYPT(l, r, i - 0); /* 16 */ 229 D_ENCRYPT(r, l, i - 2); /* 15 */ 230 } 231#endif 232 } 233 /* rotate and clear the top bits on machines with 8byte longs */ 234 data[0] = ROTATE(l, 3) & 0xffffffffL; 235 data[1] = ROTATE(r, 3) & 0xffffffffL; 236 l = r = t = u = 0; 237} 238 239void DES_encrypt3(DES_LONG *data, DES_key_schedule *ks1, 240 DES_key_schedule *ks2, DES_key_schedule *ks3) 241{ 242 register DES_LONG l, r; 243 244 l = data[0]; 245 r = data[1]; 246 IP(l, r); 247 data[0] = l; 248 data[1] = r; 249 DES_encrypt2((DES_LONG *)data, ks1, DES_ENCRYPT); 250 DES_encrypt2((DES_LONG *)data, ks2, DES_DECRYPT); 251 DES_encrypt2((DES_LONG *)data, ks3, DES_ENCRYPT); 252 l = data[0]; 253 r = data[1]; 254 FP(r, l); 255 data[0] = l; 256 data[1] = r; 257} 258 259void DES_decrypt3(DES_LONG *data, DES_key_schedule *ks1, 260 DES_key_schedule *ks2, DES_key_schedule *ks3) 261{ 262 register DES_LONG l, r; 263 264 l = data[0]; 265 r = data[1]; 266 IP(l, r); 267 data[0] = l; 268 data[1] = r; 269 DES_encrypt2((DES_LONG *)data, ks3, DES_DECRYPT); 270 DES_encrypt2((DES_LONG *)data, ks2, DES_ENCRYPT); 271 DES_encrypt2((DES_LONG *)data, ks1, DES_DECRYPT); 272 l = data[0]; 273 r = data[1]; 274 FP(r, l); 275 data[0] = l; 276 data[1] = r; 277} 278 279#ifndef DES_DEFAULT_OPTIONS 280 281# undef CBC_ENC_C__DONT_UPDATE_IV 282# include "ncbc_enc.c" /* DES_ncbc_encrypt */ 283 284void DES_ede3_cbc_encrypt(const unsigned char *input, unsigned char *output, 285 long length, DES_key_schedule *ks1, 286 DES_key_schedule *ks2, DES_key_schedule *ks3, 287 DES_cblock *ivec, int enc) 288{ 289 register DES_LONG tin0, tin1; 290 register DES_LONG tout0, tout1, xor0, xor1; 291 register const unsigned char *in; 292 unsigned char *out; 293 register long l = length; 294 DES_LONG tin[2]; 295 unsigned char *iv; 296 297 in = input; 298 out = output; 299 iv = &(*ivec)[0]; 300 301 if (enc) { 302 c2l(iv, tout0); 303 c2l(iv, tout1); 304 for (l -= 8; l >= 0; l -= 8) { 305 c2l(in, tin0); 306 c2l(in, tin1); 307 tin0 ^= tout0; 308 tin1 ^= tout1; 309 310 tin[0] = tin0; 311 tin[1] = tin1; 312 DES_encrypt3((DES_LONG *)tin, ks1, ks2, ks3); 313 tout0 = tin[0]; 314 tout1 = tin[1]; 315 316 l2c(tout0, out); 317 l2c(tout1, out); 318 } 319 if (l != -8) { 320 c2ln(in, tin0, tin1, l + 8); 321 tin0 ^= tout0; 322 tin1 ^= tout1; 323 324 tin[0] = tin0; 325 tin[1] = tin1; 326 DES_encrypt3((DES_LONG *)tin, ks1, ks2, ks3); 327 tout0 = tin[0]; 328 tout1 = tin[1]; 329 330 l2c(tout0, out); 331 l2c(tout1, out); 332 } 333 iv = &(*ivec)[0]; 334 l2c(tout0, iv); 335 l2c(tout1, iv); 336 } else { 337 register DES_LONG t0, t1; 338 339 c2l(iv, xor0); 340 c2l(iv, xor1); 341 for (l -= 8; l >= 0; l -= 8) { 342 c2l(in, tin0); 343 c2l(in, tin1); 344 345 t0 = tin0; 346 t1 = tin1; 347 348 tin[0] = tin0; 349 tin[1] = tin1; 350 DES_decrypt3((DES_LONG *)tin, ks1, ks2, ks3); 351 tout0 = tin[0]; 352 tout1 = tin[1]; 353 354 tout0 ^= xor0; 355 tout1 ^= xor1; 356 l2c(tout0, out); 357 l2c(tout1, out); 358 xor0 = t0; 359 xor1 = t1; 360 } 361 if (l != -8) { 362 c2l(in, tin0); 363 c2l(in, tin1); 364 365 t0 = tin0; 366 t1 = tin1; 367 368 tin[0] = tin0; 369 tin[1] = tin1; 370 DES_decrypt3((DES_LONG *)tin, ks1, ks2, ks3); 371 tout0 = tin[0]; 372 tout1 = tin[1]; 373 374 tout0 ^= xor0; 375 tout1 ^= xor1; 376 l2cn(tout0, tout1, out, l + 8); 377 xor0 = t0; 378 xor1 = t1; 379 } 380 381 iv = &(*ivec)[0]; 382 l2c(xor0, iv); 383 l2c(xor1, iv); 384 } 385 tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0; 386 tin[0] = tin[1] = 0; 387} 388 389#endif /* DES_DEFAULT_OPTIONS */ 390