odes_enc.c revision 1.1
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 /* Things have been modified so that the initial rotate is 77 * done outside the loop. This required the 78 * des_SPtrans values in sp.h to be rotated 1 bit to the right. 79 * One perl script later and things have a 5% speed up on a sparc2. 80 * Thanks to Richard Outerbridge <71755.204@CompuServe.COM> 81 * for pointing this out. */ 82 /* clear the top bits on machines with 8byte longs */ 83 /* shift left by 2 */ 84 r=ROTATE(r,29)&0xffffffffL; 85 l=ROTATE(l,29)&0xffffffffL; 86 87 s=ks; 88 /* I don't know if it is worth the effort of loop unrolling the 89 * inner loop */ 90 if (enc) 91 { 92#ifdef DES_UNROLL 93 D_ENCRYPT(l,r, 0); /* 1 */ 94 D_ENCRYPT(r,l, 2); /* 2 */ 95 D_ENCRYPT(l,r, 4); /* 3 */ 96 D_ENCRYPT(r,l, 6); /* 4 */ 97 D_ENCRYPT(l,r, 8); /* 5 */ 98 D_ENCRYPT(r,l,10); /* 6 */ 99 D_ENCRYPT(l,r,12); /* 7 */ 100 D_ENCRYPT(r,l,14); /* 8 */ 101 D_ENCRYPT(l,r,16); /* 9 */ 102 D_ENCRYPT(r,l,18); /* 10 */ 103 D_ENCRYPT(l,r,20); /* 11 */ 104 D_ENCRYPT(r,l,22); /* 12 */ 105 D_ENCRYPT(l,r,24); /* 13 */ 106 D_ENCRYPT(r,l,26); /* 14 */ 107 D_ENCRYPT(l,r,28); /* 15 */ 108 D_ENCRYPT(r,l,30); /* 16 */ 109#else 110 for (i=0; i<32; i+=8) 111 { 112 D_ENCRYPT(l,r,i+0); /* 1 */ 113 D_ENCRYPT(r,l,i+2); /* 2 */ 114 D_ENCRYPT(l,r,i+4); /* 3 */ 115 D_ENCRYPT(r,l,i+6); /* 4 */ 116 } 117#endif 118 } 119 else 120 { 121#ifdef DES_UNROLL 122 D_ENCRYPT(l,r,30); /* 16 */ 123 D_ENCRYPT(r,l,28); /* 15 */ 124 D_ENCRYPT(l,r,26); /* 14 */ 125 D_ENCRYPT(r,l,24); /* 13 */ 126 D_ENCRYPT(l,r,22); /* 12 */ 127 D_ENCRYPT(r,l,20); /* 11 */ 128 D_ENCRYPT(l,r,18); /* 10 */ 129 D_ENCRYPT(r,l,16); /* 9 */ 130 D_ENCRYPT(l,r,14); /* 8 */ 131 D_ENCRYPT(r,l,12); /* 7 */ 132 D_ENCRYPT(l,r,10); /* 6 */ 133 D_ENCRYPT(r,l, 8); /* 5 */ 134 D_ENCRYPT(l,r, 6); /* 4 */ 135 D_ENCRYPT(r,l, 4); /* 3 */ 136 D_ENCRYPT(l,r, 2); /* 2 */ 137 D_ENCRYPT(r,l, 0); /* 1 */ 138#else 139 for (i=30; i>0; i-=8) 140 { 141 D_ENCRYPT(l,r,i-0); /* 16 */ 142 D_ENCRYPT(r,l,i-2); /* 15 */ 143 D_ENCRYPT(l,r,i-4); /* 14 */ 144 D_ENCRYPT(r,l,i-6); /* 13 */ 145 } 146#endif 147 } 148 149 /* rotate and clear the top bits on machines with 8byte longs */ 150 l=ROTATE(l,3)&0xffffffffL; 151 r=ROTATE(r,3)&0xffffffffL; 152 153 FP(r,l); 154 data[0]=l; 155 data[1]=r; 156 l=r=t=u=0; 157 } 158 159void des_encrypt2(DES_LONG *data, des_key_schedule ks, int enc) 160 { 161 register DES_LONG l,r,t,u; 162#ifdef DES_PTR 163 register const unsigned char *des_SP=(const unsigned char *)des_SPtrans; 164#endif 165#ifndef DES_UNROLL 166 register int i; 167#endif 168 register DES_LONG *s; 169 170 r=data[0]; 171 l=data[1]; 172 173 /* Things have been modified so that the initial rotate is 174 * done outside the loop. This required the 175 * des_SPtrans values in sp.h to be rotated 1 bit to the right. 176 * One perl script later and things have a 5% speed up on a sparc2. 177 * Thanks to Richard Outerbridge <71755.204@CompuServe.COM> 178 * for pointing this out. */ 179 /* clear the top bits on machines with 8byte longs */ 180 r=ROTATE(r,29)&0xffffffffL; 181 l=ROTATE(l,29)&0xffffffffL; 182 183 s=ks; 184 /* I don't know if it is worth the effort of loop unrolling the 185 * inner loop */ 186 if (enc) 187 { 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 { 208 D_ENCRYPT(l,r,i+0); /* 1 */ 209 D_ENCRYPT(r,l,i+2); /* 2 */ 210 D_ENCRYPT(l,r,i+4); /* 3 */ 211 D_ENCRYPT(r,l,i+6); /* 4 */ 212 } 213#endif 214 } 215 else 216 { 217#ifdef DES_UNROLL 218 D_ENCRYPT(l,r,30); /* 16 */ 219 D_ENCRYPT(r,l,28); /* 15 */ 220 D_ENCRYPT(l,r,26); /* 14 */ 221 D_ENCRYPT(r,l,24); /* 13 */ 222 D_ENCRYPT(l,r,22); /* 12 */ 223 D_ENCRYPT(r,l,20); /* 11 */ 224 D_ENCRYPT(l,r,18); /* 10 */ 225 D_ENCRYPT(r,l,16); /* 9 */ 226 D_ENCRYPT(l,r,14); /* 8 */ 227 D_ENCRYPT(r,l,12); /* 7 */ 228 D_ENCRYPT(l,r,10); /* 6 */ 229 D_ENCRYPT(r,l, 8); /* 5 */ 230 D_ENCRYPT(l,r, 6); /* 4 */ 231 D_ENCRYPT(r,l, 4); /* 3 */ 232 D_ENCRYPT(l,r, 2); /* 2 */ 233 D_ENCRYPT(r,l, 0); /* 1 */ 234#else 235 for (i=30; i>0; i-=8) 236 { 237 D_ENCRYPT(l,r,i-0); /* 16 */ 238 D_ENCRYPT(r,l,i-2); /* 15 */ 239 D_ENCRYPT(l,r,i-4); /* 14 */ 240 D_ENCRYPT(r,l,i-6); /* 13 */ 241 } 242#endif 243 } 244 /* rotate and clear the top bits on machines with 8byte longs */ 245 data[0]=ROTATE(l,3)&0xffffffffL; 246 data[1]=ROTATE(r,3)&0xffffffffL; 247 l=r=t=u=0; 248 } 249 250void des_encrypt3(DES_LONG *data, des_key_schedule ks1, des_key_schedule ks2, 251 des_key_schedule ks3) 252 { 253 register DES_LONG l,r; 254 255 l=data[0]; 256 r=data[1]; 257 IP(l,r); 258 data[0]=l; 259 data[1]=r; 260 des_encrypt2((DES_LONG *)data,ks1,DES_ENCRYPT); 261 des_encrypt2((DES_LONG *)data,ks2,DES_DECRYPT); 262 des_encrypt2((DES_LONG *)data,ks3,DES_ENCRYPT); 263 l=data[0]; 264 r=data[1]; 265 FP(r,l); 266 data[0]=l; 267 data[1]=r; 268 } 269 270void des_decrypt3(DES_LONG *data, des_key_schedule ks1, des_key_schedule ks2, 271 des_key_schedule ks3) 272 { 273 register DES_LONG l,r; 274 275 l=data[0]; 276 r=data[1]; 277 IP(l,r); 278 data[0]=l; 279 data[1]=r; 280 des_encrypt2((DES_LONG *)data,ks3,DES_DECRYPT); 281 des_encrypt2((DES_LONG *)data,ks2,DES_ENCRYPT); 282 des_encrypt2((DES_LONG *)data,ks1,DES_DECRYPT); 283 l=data[0]; 284 r=data[1]; 285 FP(r,l); 286 data[0]=l; 287 data[1]=r; 288 } 289 290#ifndef DES_DEFAULT_OPTIONS 291 292#undef CBC_ENC_C__DONT_UPDATE_IV 293#include "oncbc_enc.c" /* des_ncbc_encrypt */ 294 295void des_ede3_cbc_encrypt(const unsigned char *input, unsigned char *output, 296 long length, des_key_schedule ks1, des_key_schedule ks2, 297 des_key_schedule ks3, des_cblock *ivec, int enc) 298 { 299 register DES_LONG tin0,tin1; 300 register DES_LONG tout0,tout1,xor0,xor1; 301 register const unsigned char *in; 302 unsigned char *out; 303 register long l=length; 304 DES_LONG tin[2]; 305 unsigned char *iv; 306 307 in=input; 308 out=output; 309 iv = &(*ivec)[0]; 310 311 if (enc) 312 { 313 c2l(iv,tout0); 314 c2l(iv,tout1); 315 for (l-=8; l>=0; l-=8) 316 { 317 c2l(in,tin0); 318 c2l(in,tin1); 319 tin0^=tout0; 320 tin1^=tout1; 321 322 tin[0]=tin0; 323 tin[1]=tin1; 324 des_encrypt3((DES_LONG *)tin,ks1,ks2,ks3); 325 tout0=tin[0]; 326 tout1=tin[1]; 327 328 l2c(tout0,out); 329 l2c(tout1,out); 330 } 331 if (l != -8) 332 { 333 c2ln(in,tin0,tin1,l+8); 334 tin0^=tout0; 335 tin1^=tout1; 336 337 tin[0]=tin0; 338 tin[1]=tin1; 339 des_encrypt3((DES_LONG *)tin,ks1,ks2,ks3); 340 tout0=tin[0]; 341 tout1=tin[1]; 342 343 l2c(tout0,out); 344 l2c(tout1,out); 345 } 346 iv = &(*ivec)[0]; 347 l2c(tout0,iv); 348 l2c(tout1,iv); 349 } 350 else 351 { 352 register DES_LONG t0,t1; 353 354 c2l(iv,xor0); 355 c2l(iv,xor1); 356 for (l-=8; l>=0; l-=8) 357 { 358 c2l(in,tin0); 359 c2l(in,tin1); 360 361 t0=tin0; 362 t1=tin1; 363 364 tin[0]=tin0; 365 tin[1]=tin1; 366 des_decrypt3((DES_LONG *)tin,ks1,ks2,ks3); 367 tout0=tin[0]; 368 tout1=tin[1]; 369 370 tout0^=xor0; 371 tout1^=xor1; 372 l2c(tout0,out); 373 l2c(tout1,out); 374 xor0=t0; 375 xor1=t1; 376 } 377 if (l != -8) 378 { 379 c2l(in,tin0); 380 c2l(in,tin1); 381 382 t0=tin0; 383 t1=tin1; 384 385 tin[0]=tin0; 386 tin[1]=tin1; 387 des_decrypt3((DES_LONG *)tin,ks1,ks2,ks3); 388 tout0=tin[0]; 389 tout1=tin[1]; 390 391 tout0^=xor0; 392 tout1^=xor1; 393 l2cn(tout0,tout1,out,l+8); 394 xor0=t0; 395 xor1=t1; 396 } 397 398 iv = &(*ivec)[0]; 399 l2c(xor0,iv); 400 l2c(xor1,iv); 401 } 402 tin0=tin1=tout0=tout1=xor0=xor1=0; 403 tin[0]=tin[1]=0; 404 } 405 406#endif /* DES_DEFAULT_OPTIONS */ 407