des_enc.c revision 296465
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 61void DES_encrypt1(DES_LONG *data, DES_key_schedule *ks, int enc) 62{ 63 register DES_LONG l, r, t, u; 64#ifdef DES_PTR 65 register const unsigned char *des_SP = (const unsigned char *)DES_SPtrans; 66#endif 67#ifndef DES_UNROLL 68 register int i; 69#endif 70 register DES_LONG *s; 71 72 r = data[0]; 73 l = data[1]; 74 75 IP(r, l); 76 /* 77 * Things have been modified so that the initial rotate is done outside 78 * the loop. This required the DES_SPtrans values in sp.h to be rotated 79 * 1 bit to the right. One perl script later and things have a 5% speed 80 * up on a sparc2. Thanks to Richard Outerbridge 81 * <71755.204@CompuServe.COM> for pointing this out. 82 */ 83 /* clear the top bits on machines with 8byte longs */ 84 /* shift left by 2 */ 85 r = ROTATE(r, 29) & 0xffffffffL; 86 l = ROTATE(l, 29) & 0xffffffffL; 87 88 s = ks->ks->deslong; 89 /* 90 * I don't know if it is worth the effort of loop unrolling the inner 91 * loop 92 */ 93 if (enc) { 94#ifdef DES_UNROLL 95 D_ENCRYPT(l, r, 0); /* 1 */ 96 D_ENCRYPT(r, l, 2); /* 2 */ 97 D_ENCRYPT(l, r, 4); /* 3 */ 98 D_ENCRYPT(r, l, 6); /* 4 */ 99 D_ENCRYPT(l, r, 8); /* 5 */ 100 D_ENCRYPT(r, l, 10); /* 6 */ 101 D_ENCRYPT(l, r, 12); /* 7 */ 102 D_ENCRYPT(r, l, 14); /* 8 */ 103 D_ENCRYPT(l, r, 16); /* 9 */ 104 D_ENCRYPT(r, l, 18); /* 10 */ 105 D_ENCRYPT(l, r, 20); /* 11 */ 106 D_ENCRYPT(r, l, 22); /* 12 */ 107 D_ENCRYPT(l, r, 24); /* 13 */ 108 D_ENCRYPT(r, l, 26); /* 14 */ 109 D_ENCRYPT(l, r, 28); /* 15 */ 110 D_ENCRYPT(r, l, 30); /* 16 */ 111#else 112 for (i = 0; i < 32; i += 8) { 113 D_ENCRYPT(l, r, i + 0); /* 1 */ 114 D_ENCRYPT(r, l, i + 2); /* 2 */ 115 D_ENCRYPT(l, r, i + 4); /* 3 */ 116 D_ENCRYPT(r, l, i + 6); /* 4 */ 117 } 118#endif 119 } else { 120#ifdef DES_UNROLL 121 D_ENCRYPT(l, r, 30); /* 16 */ 122 D_ENCRYPT(r, l, 28); /* 15 */ 123 D_ENCRYPT(l, r, 26); /* 14 */ 124 D_ENCRYPT(r, l, 24); /* 13 */ 125 D_ENCRYPT(l, r, 22); /* 12 */ 126 D_ENCRYPT(r, l, 20); /* 11 */ 127 D_ENCRYPT(l, r, 18); /* 10 */ 128 D_ENCRYPT(r, l, 16); /* 9 */ 129 D_ENCRYPT(l, r, 14); /* 8 */ 130 D_ENCRYPT(r, l, 12); /* 7 */ 131 D_ENCRYPT(l, r, 10); /* 6 */ 132 D_ENCRYPT(r, l, 8); /* 5 */ 133 D_ENCRYPT(l, r, 6); /* 4 */ 134 D_ENCRYPT(r, l, 4); /* 3 */ 135 D_ENCRYPT(l, r, 2); /* 2 */ 136 D_ENCRYPT(r, l, 0); /* 1 */ 137#else 138 for (i = 30; i > 0; i -= 8) { 139 D_ENCRYPT(l, r, i - 0); /* 16 */ 140 D_ENCRYPT(r, l, i - 2); /* 15 */ 141 D_ENCRYPT(l, r, i - 4); /* 14 */ 142 D_ENCRYPT(r, l, i - 6); /* 13 */ 143 } 144#endif 145 } 146 147 /* rotate and clear the top bits on machines with 8byte longs */ 148 l = ROTATE(l, 3) & 0xffffffffL; 149 r = ROTATE(r, 3) & 0xffffffffL; 150 151 FP(r, l); 152 data[0] = l; 153 data[1] = r; 154 l = r = t = u = 0; 155} 156 157void DES_encrypt2(DES_LONG *data, DES_key_schedule *ks, int enc) 158{ 159 register DES_LONG l, r, t, u; 160#ifdef DES_PTR 161 register const unsigned char *des_SP = (const unsigned char *)DES_SPtrans; 162#endif 163#ifndef DES_UNROLL 164 register int i; 165#endif 166 register DES_LONG *s; 167 168 r = data[0]; 169 l = data[1]; 170 171 /* 172 * Things have been modified so that the initial rotate is done outside 173 * the loop. This required the DES_SPtrans values in sp.h to be rotated 174 * 1 bit to the right. One perl script later and things have a 5% speed 175 * up on a sparc2. Thanks to Richard Outerbridge 176 * <71755.204@CompuServe.COM> for pointing this out. 177 */ 178 /* clear the top bits on machines with 8byte longs */ 179 r = ROTATE(r, 29) & 0xffffffffL; 180 l = ROTATE(l, 29) & 0xffffffffL; 181 182 s = ks->ks->deslong; 183 /* 184 * I don't know if it is worth the effort of loop unrolling the inner 185 * loop 186 */ 187 if (enc) { 188#ifdef DES_UNROLL 189 D_ENCRYPT(l, r, 0); /* 1 */ 190 D_ENCRYPT(r, l, 2); /* 2 */ 191 D_ENCRYPT(l, r, 4); /* 3 */ 192 D_ENCRYPT(r, l, 6); /* 4 */ 193 D_ENCRYPT(l, r, 8); /* 5 */ 194 D_ENCRYPT(r, l, 10); /* 6 */ 195 D_ENCRYPT(l, r, 12); /* 7 */ 196 D_ENCRYPT(r, l, 14); /* 8 */ 197 D_ENCRYPT(l, r, 16); /* 9 */ 198 D_ENCRYPT(r, l, 18); /* 10 */ 199 D_ENCRYPT(l, r, 20); /* 11 */ 200 D_ENCRYPT(r, l, 22); /* 12 */ 201 D_ENCRYPT(l, r, 24); /* 13 */ 202 D_ENCRYPT(r, l, 26); /* 14 */ 203 D_ENCRYPT(l, r, 28); /* 15 */ 204 D_ENCRYPT(r, l, 30); /* 16 */ 205#else 206 for (i = 0; i < 32; i += 8) { 207 D_ENCRYPT(l, r, i + 0); /* 1 */ 208 D_ENCRYPT(r, l, i + 2); /* 2 */ 209 D_ENCRYPT(l, r, i + 4); /* 3 */ 210 D_ENCRYPT(r, l, i + 6); /* 4 */ 211 } 212#endif 213 } else { 214#ifdef DES_UNROLL 215 D_ENCRYPT(l, r, 30); /* 16 */ 216 D_ENCRYPT(r, l, 28); /* 15 */ 217 D_ENCRYPT(l, r, 26); /* 14 */ 218 D_ENCRYPT(r, l, 24); /* 13 */ 219 D_ENCRYPT(l, r, 22); /* 12 */ 220 D_ENCRYPT(r, l, 20); /* 11 */ 221 D_ENCRYPT(l, r, 18); /* 10 */ 222 D_ENCRYPT(r, l, 16); /* 9 */ 223 D_ENCRYPT(l, r, 14); /* 8 */ 224 D_ENCRYPT(r, l, 12); /* 7 */ 225 D_ENCRYPT(l, r, 10); /* 6 */ 226 D_ENCRYPT(r, l, 8); /* 5 */ 227 D_ENCRYPT(l, r, 6); /* 4 */ 228 D_ENCRYPT(r, l, 4); /* 3 */ 229 D_ENCRYPT(l, r, 2); /* 2 */ 230 D_ENCRYPT(r, l, 0); /* 1 */ 231#else 232 for (i = 30; i > 0; i -= 8) { 233 D_ENCRYPT(l, r, i - 0); /* 16 */ 234 D_ENCRYPT(r, l, i - 2); /* 15 */ 235 D_ENCRYPT(l, r, i - 4); /* 14 */ 236 D_ENCRYPT(r, l, i - 6); /* 13 */ 237 } 238#endif 239 } 240 /* rotate and clear the top bits on machines with 8byte longs */ 241 data[0] = ROTATE(l, 3) & 0xffffffffL; 242 data[1] = ROTATE(r, 3) & 0xffffffffL; 243 l = r = t = u = 0; 244} 245 246void DES_encrypt3(DES_LONG *data, DES_key_schedule *ks1, 247 DES_key_schedule *ks2, DES_key_schedule *ks3) 248{ 249 register DES_LONG l, r; 250 251 l = data[0]; 252 r = data[1]; 253 IP(l, r); 254 data[0] = l; 255 data[1] = r; 256 DES_encrypt2((DES_LONG *)data, ks1, DES_ENCRYPT); 257 DES_encrypt2((DES_LONG *)data, ks2, DES_DECRYPT); 258 DES_encrypt2((DES_LONG *)data, ks3, DES_ENCRYPT); 259 l = data[0]; 260 r = data[1]; 261 FP(r, l); 262 data[0] = l; 263 data[1] = r; 264} 265 266void DES_decrypt3(DES_LONG *data, DES_key_schedule *ks1, 267 DES_key_schedule *ks2, DES_key_schedule *ks3) 268{ 269 register DES_LONG l, r; 270 271 l = data[0]; 272 r = data[1]; 273 IP(l, r); 274 data[0] = l; 275 data[1] = r; 276 DES_encrypt2((DES_LONG *)data, ks3, DES_DECRYPT); 277 DES_encrypt2((DES_LONG *)data, ks2, DES_ENCRYPT); 278 DES_encrypt2((DES_LONG *)data, ks1, DES_DECRYPT); 279 l = data[0]; 280 r = data[1]; 281 FP(r, l); 282 data[0] = l; 283 data[1] = r; 284} 285 286#ifndef DES_DEFAULT_OPTIONS 287 288# if !defined(OPENSSL_FIPS_DES_ASM) 289 290# undef CBC_ENC_C__DONT_UPDATE_IV 291# include "ncbc_enc.c" /* DES_ncbc_encrypt */ 292 293void DES_ede3_cbc_encrypt(const unsigned char *input, unsigned char *output, 294 long length, DES_key_schedule *ks1, 295 DES_key_schedule *ks2, DES_key_schedule *ks3, 296 DES_cblock *ivec, int enc) 297{ 298 register DES_LONG tin0, tin1; 299 register DES_LONG tout0, tout1, xor0, xor1; 300 register const unsigned char *in; 301 unsigned char *out; 302 register long l = length; 303 DES_LONG tin[2]; 304 unsigned char *iv; 305 306 in = input; 307 out = output; 308 iv = &(*ivec)[0]; 309 310 if (enc) { 311 c2l(iv, tout0); 312 c2l(iv, tout1); 313 for (l -= 8; l >= 0; l -= 8) { 314 c2l(in, tin0); 315 c2l(in, tin1); 316 tin0 ^= tout0; 317 tin1 ^= tout1; 318 319 tin[0] = tin0; 320 tin[1] = tin1; 321 DES_encrypt3((DES_LONG *)tin, ks1, ks2, ks3); 322 tout0 = tin[0]; 323 tout1 = tin[1]; 324 325 l2c(tout0, out); 326 l2c(tout1, out); 327 } 328 if (l != -8) { 329 c2ln(in, tin0, tin1, l + 8); 330 tin0 ^= tout0; 331 tin1 ^= tout1; 332 333 tin[0] = tin0; 334 tin[1] = tin1; 335 DES_encrypt3((DES_LONG *)tin, ks1, ks2, ks3); 336 tout0 = tin[0]; 337 tout1 = tin[1]; 338 339 l2c(tout0, out); 340 l2c(tout1, out); 341 } 342 iv = &(*ivec)[0]; 343 l2c(tout0, iv); 344 l2c(tout1, iv); 345 } else { 346 register DES_LONG t0, t1; 347 348 c2l(iv, xor0); 349 c2l(iv, xor1); 350 for (l -= 8; l >= 0; l -= 8) { 351 c2l(in, tin0); 352 c2l(in, tin1); 353 354 t0 = tin0; 355 t1 = tin1; 356 357 tin[0] = tin0; 358 tin[1] = tin1; 359 DES_decrypt3((DES_LONG *)tin, ks1, ks2, ks3); 360 tout0 = tin[0]; 361 tout1 = tin[1]; 362 363 tout0 ^= xor0; 364 tout1 ^= xor1; 365 l2c(tout0, out); 366 l2c(tout1, out); 367 xor0 = t0; 368 xor1 = t1; 369 } 370 if (l != -8) { 371 c2l(in, tin0); 372 c2l(in, tin1); 373 374 t0 = tin0; 375 t1 = tin1; 376 377 tin[0] = tin0; 378 tin[1] = tin1; 379 DES_decrypt3((DES_LONG *)tin, ks1, ks2, ks3); 380 tout0 = tin[0]; 381 tout1 = tin[1]; 382 383 tout0 ^= xor0; 384 tout1 ^= xor1; 385 l2cn(tout0, tout1, out, l + 8); 386 xor0 = t0; 387 xor1 = t1; 388 } 389 390 iv = &(*ivec)[0]; 391 l2c(xor0, iv); 392 l2c(xor1, iv); 393 } 394 tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0; 395 tin[0] = tin[1] = 0; 396} 397 398# endif 399 400#endif /* DES_DEFAULT_OPTIONS */ 401