1 /* $OpenBSD: des_enc.c,v 1.16 2024/03/29 01:47:29 joshua Exp $ */ 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_local.h" 60 #include "spr.h" 61 62 #ifndef OPENBSD_DES_ASM 63 64 void 65 DES_encrypt1(DES_LONG *data, DES_key_schedule *ks, int enc) 66 { 67 DES_LONG l, r, t, u; 68 #ifdef DES_PTR 69 const unsigned char *des_SP = (const unsigned char *)DES_SPtrans; 70 #endif 71 #ifndef DES_UNROLL 72 int i; 73 #endif 74 DES_LONG *s; 75 76 r = data[0]; 77 l = data[1]; 78 79 IP(r, l); 80 /* Things have been modified so that the initial rotate is 81 * done outside the loop. This required the 82 * DES_SPtrans values in sp.h to be rotated 1 bit to the right. 83 * One perl script later and things have a 5% speed up on a sparc2. 84 * Thanks to Richard Outerbridge <71755.204@CompuServe.COM> 85 * for pointing this out. */ 86 /* clear the top bits on machines with 8byte longs */ 87 /* shift left by 2 */ 88 r = ROTATE(r, 29) & 0xffffffffL; 89 l = ROTATE(l, 29) & 0xffffffffL; 90 91 s = ks->ks->deslong; 92 /* I don't know if it is worth the effort of loop unrolling the 93 * inner loop */ 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 LCRYPTO_ALIAS(DES_encrypt1); 154 155 void 156 DES_encrypt2(DES_LONG *data, DES_key_schedule *ks, int enc) 157 { 158 DES_LONG l, r, t, u; 159 #ifdef DES_PTR 160 const unsigned char *des_SP = (const unsigned char *)DES_SPtrans; 161 #endif 162 #ifndef DES_UNROLL 163 int i; 164 #endif 165 DES_LONG *s; 166 167 r = data[0]; 168 l = data[1]; 169 170 /* Things have been modified so that the initial rotate is 171 * done outside the loop. This required the 172 * DES_SPtrans values in sp.h to be rotated 1 bit to the right. 173 * One perl script later and things have a 5% speed up on a sparc2. 174 * Thanks to Richard Outerbridge <71755.204@CompuServe.COM> 175 * for pointing this out. */ 176 /* clear the top bits on machines with 8byte longs */ 177 r = ROTATE(r, 29) & 0xffffffffL; 178 l = ROTATE(l, 29) & 0xffffffffL; 179 180 s = ks->ks->deslong; 181 /* I don't know if it is worth the effort of loop unrolling the 182 * inner loop */ 183 if (enc) { 184 #ifdef DES_UNROLL 185 D_ENCRYPT(l, r, 0); /* 1 */ 186 D_ENCRYPT(r, l, 2); /* 2 */ 187 D_ENCRYPT(l, r, 4); /* 3 */ 188 D_ENCRYPT(r, l, 6); /* 4 */ 189 D_ENCRYPT(l, r, 8); /* 5 */ 190 D_ENCRYPT(r, l, 10); /* 6 */ 191 D_ENCRYPT(l, r, 12); /* 7 */ 192 D_ENCRYPT(r, l, 14); /* 8 */ 193 D_ENCRYPT(l, r, 16); /* 9 */ 194 D_ENCRYPT(r, l, 18); /* 10 */ 195 D_ENCRYPT(l, r, 20); /* 11 */ 196 D_ENCRYPT(r, l, 22); /* 12 */ 197 D_ENCRYPT(l, r, 24); /* 13 */ 198 D_ENCRYPT(r, l, 26); /* 14 */ 199 D_ENCRYPT(l, r, 28); /* 15 */ 200 D_ENCRYPT(r, l, 30); /* 16 */ 201 #else 202 for (i = 0; i < 32; i += 4) { 203 D_ENCRYPT(l, r, i + 0); /* 1 */ 204 D_ENCRYPT(r, l, i + 2); /* 2 */ 205 } 206 #endif 207 } else { 208 #ifdef DES_UNROLL 209 D_ENCRYPT(l, r, 30); /* 16 */ 210 D_ENCRYPT(r, l, 28); /* 15 */ 211 D_ENCRYPT(l, r, 26); /* 14 */ 212 D_ENCRYPT(r, l, 24); /* 13 */ 213 D_ENCRYPT(l, r, 22); /* 12 */ 214 D_ENCRYPT(r, l, 20); /* 11 */ 215 D_ENCRYPT(l, r, 18); /* 10 */ 216 D_ENCRYPT(r, l, 16); /* 9 */ 217 D_ENCRYPT(l, r, 14); /* 8 */ 218 D_ENCRYPT(r, l, 12); /* 7 */ 219 D_ENCRYPT(l, r, 10); /* 6 */ 220 D_ENCRYPT(r, l, 8); /* 5 */ 221 D_ENCRYPT(l, r, 6); /* 4 */ 222 D_ENCRYPT(r, l, 4); /* 3 */ 223 D_ENCRYPT(l, r, 2); /* 2 */ 224 D_ENCRYPT(r, l, 0); /* 1 */ 225 #else 226 for (i = 30; i > 0; i -= 4) { 227 D_ENCRYPT(l, r, i - 0); /* 16 */ 228 D_ENCRYPT(r, l, i - 2); /* 15 */ 229 } 230 #endif 231 } 232 /* rotate and clear the top bits on machines with 8byte longs */ 233 data[0] = ROTATE(l, 3) & 0xffffffffL; 234 data[1] = ROTATE(r, 3) & 0xffffffffL; 235 l = r = t = u = 0; 236 } 237 LCRYPTO_ALIAS(DES_encrypt2); 238 239 #endif /* OPENBSD_DES_ASM */ 240 241 void 242 DES_encrypt3(DES_LONG *data, DES_key_schedule *ks1, 243 DES_key_schedule *ks2, DES_key_schedule *ks3) 244 { 245 DES_LONG l, r; 246 247 l = data[0]; 248 r = data[1]; 249 IP(l, r); 250 data[0] = l; 251 data[1] = r; 252 DES_encrypt2((DES_LONG *)data, ks1, DES_ENCRYPT); 253 DES_encrypt2((DES_LONG *)data, ks2, DES_DECRYPT); 254 DES_encrypt2((DES_LONG *)data, ks3, DES_ENCRYPT); 255 l = data[0]; 256 r = data[1]; 257 FP(r, l); 258 data[0] = l; 259 data[1] = r; 260 } 261 LCRYPTO_ALIAS(DES_encrypt3); 262 263 void 264 DES_decrypt3(DES_LONG *data, DES_key_schedule *ks1, 265 DES_key_schedule *ks2, DES_key_schedule *ks3) 266 { 267 DES_LONG l, r; 268 269 l = data[0]; 270 r = data[1]; 271 IP(l, r); 272 data[0] = l; 273 data[1] = r; 274 DES_encrypt2((DES_LONG *)data, ks3, DES_DECRYPT); 275 DES_encrypt2((DES_LONG *)data, ks2, DES_ENCRYPT); 276 DES_encrypt2((DES_LONG *)data, ks1, DES_DECRYPT); 277 l = data[0]; 278 r = data[1]; 279 FP(r, l); 280 data[0] = l; 281 data[1] = r; 282 } 283 LCRYPTO_ALIAS(DES_decrypt3); 284 285 #ifndef DES_DEFAULT_OPTIONS 286 287 #undef CBC_ENC_C__DONT_UPDATE_IV 288 #include "ncbc_enc.c" /* DES_ncbc_encrypt */ 289 290 void 291 DES_ede3_cbc_encrypt(const unsigned char *input, unsigned char *output, 292 long length, DES_key_schedule *ks1, 293 DES_key_schedule *ks2, DES_key_schedule *ks3, 294 DES_cblock *ivec, int enc) 295 { 296 DES_LONG tin0, tin1; 297 DES_LONG tout0, tout1, xor0, xor1; 298 const unsigned char *in; 299 unsigned char *out; 300 long l = length; 301 DES_LONG tin[2]; 302 unsigned char *iv; 303 304 in = input; 305 out = output; 306 iv = &(*ivec)[0]; 307 308 if (enc) { 309 c2l(iv, tout0); 310 c2l(iv, tout1); 311 for (l -= 8; l >= 0; l -= 8) { 312 c2l(in, tin0); 313 c2l(in, tin1); 314 tin0 ^= tout0; 315 tin1 ^= tout1; 316 317 tin[0] = tin0; 318 tin[1] = tin1; 319 DES_encrypt3((DES_LONG *)tin, ks1, ks2, ks3); 320 tout0 = tin[0]; 321 tout1 = tin[1]; 322 323 l2c(tout0, out); 324 l2c(tout1, out); 325 } 326 if (l != -8) { 327 c2ln(in, tin0, tin1, l + 8); 328 tin0 ^= tout0; 329 tin1 ^= tout1; 330 331 tin[0] = tin0; 332 tin[1] = tin1; 333 DES_encrypt3((DES_LONG *)tin, ks1, ks2, ks3); 334 tout0 = tin[0]; 335 tout1 = tin[1]; 336 337 l2c(tout0, out); 338 l2c(tout1, out); 339 } 340 iv = &(*ivec)[0]; 341 l2c(tout0, iv); 342 l2c(tout1, iv); 343 } else { 344 DES_LONG t0, t1; 345 346 c2l(iv, xor0); 347 c2l(iv, xor1); 348 for (l -= 8; l >= 0; l -= 8) { 349 c2l(in, tin0); 350 c2l(in, tin1); 351 352 t0 = tin0; 353 t1 = tin1; 354 355 tin[0] = tin0; 356 tin[1] = tin1; 357 DES_decrypt3((DES_LONG *)tin, ks1, ks2, ks3); 358 tout0 = tin[0]; 359 tout1 = tin[1]; 360 361 tout0 ^= xor0; 362 tout1 ^= xor1; 363 l2c(tout0, out); 364 l2c(tout1, out); 365 xor0 = t0; 366 xor1 = t1; 367 } 368 if (l != -8) { 369 c2l(in, tin0); 370 c2l(in, tin1); 371 372 t0 = tin0; 373 t1 = tin1; 374 375 tin[0] = tin0; 376 tin[1] = tin1; 377 DES_decrypt3((DES_LONG *)tin, ks1, ks2, ks3); 378 tout0 = tin[0]; 379 tout1 = tin[1]; 380 381 tout0 ^= xor0; 382 tout1 ^= xor1; 383 l2cn(tout0, tout1, out, l + 8); 384 xor0 = t0; 385 xor1 = t1; 386 } 387 388 iv = &(*ivec)[0]; 389 l2c(xor0, iv); 390 l2c(xor1, iv); 391 } 392 tin0 = tin1 = tout0 = tout1 = xor0 = xor1 = 0; 393 tin[0] = tin[1] = 0; 394 } 395 LCRYPTO_ALIAS(DES_ede3_cbc_encrypt); 396 397 #endif /* DES_DEFAULT_OPTIONS */ 398