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 61 #ifndef OPENBSD_DES_ASM 62 63 void DES_encrypt1(DES_LONG *data, DES_key_schedule *ks, int enc) 64 { 65 register DES_LONG l,r,t,u; 66 #ifdef DES_PTR 67 register const unsigned char *des_SP=(const unsigned char *)DES_SPtrans; 68 #endif 69 #ifndef DES_UNROLL 70 register int i; 71 #endif 72 register DES_LONG *s; 73 74 r=data[0]; 75 l=data[1]; 76 77 IP(r,l); 78 /* Things have been modified so that the initial rotate is 79 * done outside the loop. This required the 80 * DES_SPtrans values in sp.h to be rotated 1 bit to the right. 81 * One perl script later and things have a 5% speed up on a sparc2. 82 * Thanks to Richard Outerbridge <71755.204@CompuServe.COM> 83 * for pointing this out. */ 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 /* I don't know if it is worth the effort of loop unrolling the 91 * inner loop */ 92 if (enc) 93 { 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 { 114 D_ENCRYPT(l,r,i+0); /* 1 */ 115 D_ENCRYPT(r,l,i+2); /* 2 */ 116 D_ENCRYPT(l,r,i+4); /* 3 */ 117 D_ENCRYPT(r,l,i+6); /* 4 */ 118 } 119 #endif 120 } 121 else 122 { 123 #ifdef DES_UNROLL 124 D_ENCRYPT(l,r,30); /* 16 */ 125 D_ENCRYPT(r,l,28); /* 15 */ 126 D_ENCRYPT(l,r,26); /* 14 */ 127 D_ENCRYPT(r,l,24); /* 13 */ 128 D_ENCRYPT(l,r,22); /* 12 */ 129 D_ENCRYPT(r,l,20); /* 11 */ 130 D_ENCRYPT(l,r,18); /* 10 */ 131 D_ENCRYPT(r,l,16); /* 9 */ 132 D_ENCRYPT(l,r,14); /* 8 */ 133 D_ENCRYPT(r,l,12); /* 7 */ 134 D_ENCRYPT(l,r,10); /* 6 */ 135 D_ENCRYPT(r,l, 8); /* 5 */ 136 D_ENCRYPT(l,r, 6); /* 4 */ 137 D_ENCRYPT(r,l, 4); /* 3 */ 138 D_ENCRYPT(l,r, 2); /* 2 */ 139 D_ENCRYPT(r,l, 0); /* 1 */ 140 #else 141 for (i=30; i>0; i-=8) 142 { 143 D_ENCRYPT(l,r,i-0); /* 16 */ 144 D_ENCRYPT(r,l,i-2); /* 15 */ 145 D_ENCRYPT(l,r,i-4); /* 14 */ 146 D_ENCRYPT(r,l,i-6); /* 13 */ 147 } 148 #endif 149 } 150 151 /* rotate and clear the top bits on machines with 8byte longs */ 152 l=ROTATE(l,3)&0xffffffffL; 153 r=ROTATE(r,3)&0xffffffffL; 154 155 FP(r,l); 156 data[0]=l; 157 data[1]=r; 158 l=r=t=u=0; 159 } 160 161 void DES_encrypt2(DES_LONG *data, DES_key_schedule *ks, int enc) 162 { 163 register DES_LONG l,r,t,u; 164 #ifdef DES_PTR 165 register const unsigned char *des_SP=(const unsigned char *)DES_SPtrans; 166 #endif 167 #ifndef DES_UNROLL 168 register int i; 169 #endif 170 register DES_LONG *s; 171 172 r=data[0]; 173 l=data[1]; 174 175 /* Things have been modified so that the initial rotate is 176 * done outside the loop. This required the 177 * DES_SPtrans values in sp.h to be rotated 1 bit to the right. 178 * One perl script later and things have a 5% speed up on a sparc2. 179 * Thanks to Richard Outerbridge <71755.204@CompuServe.COM> 180 * for pointing this out. */ 181 /* clear the top bits on machines with 8byte longs */ 182 r=ROTATE(r,29)&0xffffffffL; 183 l=ROTATE(l,29)&0xffffffffL; 184 185 s=ks->ks->deslong; 186 /* I don't know if it is worth the effort of loop unrolling the 187 * inner loop */ 188 if (enc) 189 { 190 #ifdef DES_UNROLL 191 D_ENCRYPT(l,r, 0); /* 1 */ 192 D_ENCRYPT(r,l, 2); /* 2 */ 193 D_ENCRYPT(l,r, 4); /* 3 */ 194 D_ENCRYPT(r,l, 6); /* 4 */ 195 D_ENCRYPT(l,r, 8); /* 5 */ 196 D_ENCRYPT(r,l,10); /* 6 */ 197 D_ENCRYPT(l,r,12); /* 7 */ 198 D_ENCRYPT(r,l,14); /* 8 */ 199 D_ENCRYPT(l,r,16); /* 9 */ 200 D_ENCRYPT(r,l,18); /* 10 */ 201 D_ENCRYPT(l,r,20); /* 11 */ 202 D_ENCRYPT(r,l,22); /* 12 */ 203 D_ENCRYPT(l,r,24); /* 13 */ 204 D_ENCRYPT(r,l,26); /* 14 */ 205 D_ENCRYPT(l,r,28); /* 15 */ 206 D_ENCRYPT(r,l,30); /* 16 */ 207 #else 208 for (i=0; i<32; i+=8) 209 { 210 D_ENCRYPT(l,r,i+0); /* 1 */ 211 D_ENCRYPT(r,l,i+2); /* 2 */ 212 D_ENCRYPT(l,r,i+4); /* 3 */ 213 D_ENCRYPT(r,l,i+6); /* 4 */ 214 } 215 #endif 216 } 217 else 218 { 219 #ifdef DES_UNROLL 220 D_ENCRYPT(l,r,30); /* 16 */ 221 D_ENCRYPT(r,l,28); /* 15 */ 222 D_ENCRYPT(l,r,26); /* 14 */ 223 D_ENCRYPT(r,l,24); /* 13 */ 224 D_ENCRYPT(l,r,22); /* 12 */ 225 D_ENCRYPT(r,l,20); /* 11 */ 226 D_ENCRYPT(l,r,18); /* 10 */ 227 D_ENCRYPT(r,l,16); /* 9 */ 228 D_ENCRYPT(l,r,14); /* 8 */ 229 D_ENCRYPT(r,l,12); /* 7 */ 230 D_ENCRYPT(l,r,10); /* 6 */ 231 D_ENCRYPT(r,l, 8); /* 5 */ 232 D_ENCRYPT(l,r, 6); /* 4 */ 233 D_ENCRYPT(r,l, 4); /* 3 */ 234 D_ENCRYPT(l,r, 2); /* 2 */ 235 D_ENCRYPT(r,l, 0); /* 1 */ 236 #else 237 for (i=30; i>0; i-=8) 238 { 239 D_ENCRYPT(l,r,i-0); /* 16 */ 240 D_ENCRYPT(r,l,i-2); /* 15 */ 241 D_ENCRYPT(l,r,i-4); /* 14 */ 242 D_ENCRYPT(r,l,i-6); /* 13 */ 243 } 244 #endif 245 } 246 /* rotate and clear the top bits on machines with 8byte longs */ 247 data[0]=ROTATE(l,3)&0xffffffffL; 248 data[1]=ROTATE(r,3)&0xffffffffL; 249 l=r=t=u=0; 250 } 251 252 #endif /* OPENBSD_DES_ASM */ 253 254 void DES_encrypt3(DES_LONG *data, DES_key_schedule *ks1, 255 DES_key_schedule *ks2, DES_key_schedule *ks3) 256 { 257 register DES_LONG l,r; 258 259 l=data[0]; 260 r=data[1]; 261 IP(l,r); 262 data[0]=l; 263 data[1]=r; 264 DES_encrypt2((DES_LONG *)data,ks1,DES_ENCRYPT); 265 DES_encrypt2((DES_LONG *)data,ks2,DES_DECRYPT); 266 DES_encrypt2((DES_LONG *)data,ks3,DES_ENCRYPT); 267 l=data[0]; 268 r=data[1]; 269 FP(r,l); 270 data[0]=l; 271 data[1]=r; 272 } 273 274 void DES_decrypt3(DES_LONG *data, DES_key_schedule *ks1, 275 DES_key_schedule *ks2, DES_key_schedule *ks3) 276 { 277 register DES_LONG l,r; 278 279 l=data[0]; 280 r=data[1]; 281 IP(l,r); 282 data[0]=l; 283 data[1]=r; 284 DES_encrypt2((DES_LONG *)data,ks3,DES_DECRYPT); 285 DES_encrypt2((DES_LONG *)data,ks2,DES_ENCRYPT); 286 DES_encrypt2((DES_LONG *)data,ks1,DES_DECRYPT); 287 l=data[0]; 288 r=data[1]; 289 FP(r,l); 290 data[0]=l; 291 data[1]=r; 292 } 293 294 #ifndef DES_DEFAULT_OPTIONS 295 296 #if !defined(OPENSSL_FIPS_DES_ASM) 297 298 #undef CBC_ENC_C__DONT_UPDATE_IV 299 #include "ncbc_enc.c" /* DES_ncbc_encrypt */ 300 301 void DES_ede3_cbc_encrypt(const unsigned char *input, unsigned char *output, 302 long length, DES_key_schedule *ks1, 303 DES_key_schedule *ks2, DES_key_schedule *ks3, 304 DES_cblock *ivec, int enc) 305 { 306 register DES_LONG tin0,tin1; 307 register DES_LONG tout0,tout1,xor0,xor1; 308 register const unsigned char *in; 309 unsigned char *out; 310 register long l=length; 311 DES_LONG tin[2]; 312 unsigned char *iv; 313 314 in=input; 315 out=output; 316 iv = &(*ivec)[0]; 317 318 if (enc) 319 { 320 c2l(iv,tout0); 321 c2l(iv,tout1); 322 for (l-=8; l>=0; l-=8) 323 { 324 c2l(in,tin0); 325 c2l(in,tin1); 326 tin0^=tout0; 327 tin1^=tout1; 328 329 tin[0]=tin0; 330 tin[1]=tin1; 331 DES_encrypt3((DES_LONG *)tin,ks1,ks2,ks3); 332 tout0=tin[0]; 333 tout1=tin[1]; 334 335 l2c(tout0,out); 336 l2c(tout1,out); 337 } 338 if (l != -8) 339 { 340 c2ln(in,tin0,tin1,l+8); 341 tin0^=tout0; 342 tin1^=tout1; 343 344 tin[0]=tin0; 345 tin[1]=tin1; 346 DES_encrypt3((DES_LONG *)tin,ks1,ks2,ks3); 347 tout0=tin[0]; 348 tout1=tin[1]; 349 350 l2c(tout0,out); 351 l2c(tout1,out); 352 } 353 iv = &(*ivec)[0]; 354 l2c(tout0,iv); 355 l2c(tout1,iv); 356 } 357 else 358 { 359 register DES_LONG t0,t1; 360 361 c2l(iv,xor0); 362 c2l(iv,xor1); 363 for (l-=8; l>=0; l-=8) 364 { 365 c2l(in,tin0); 366 c2l(in,tin1); 367 368 t0=tin0; 369 t1=tin1; 370 371 tin[0]=tin0; 372 tin[1]=tin1; 373 DES_decrypt3((DES_LONG *)tin,ks1,ks2,ks3); 374 tout0=tin[0]; 375 tout1=tin[1]; 376 377 tout0^=xor0; 378 tout1^=xor1; 379 l2c(tout0,out); 380 l2c(tout1,out); 381 xor0=t0; 382 xor1=t1; 383 } 384 if (l != -8) 385 { 386 c2l(in,tin0); 387 c2l(in,tin1); 388 389 t0=tin0; 390 t1=tin1; 391 392 tin[0]=tin0; 393 tin[1]=tin1; 394 DES_decrypt3((DES_LONG *)tin,ks1,ks2,ks3); 395 tout0=tin[0]; 396 tout1=tin[1]; 397 398 tout0^=xor0; 399 tout1^=xor1; 400 l2cn(tout0,tout1,out,l+8); 401 xor0=t0; 402 xor1=t1; 403 } 404 405 iv = &(*ivec)[0]; 406 l2c(xor0,iv); 407 l2c(xor1,iv); 408 } 409 tin0=tin1=tout0=tout1=xor0=xor1=0; 410 tin[0]=tin[1]=0; 411 } 412 413 #endif 414 415 #endif /* DES_DEFAULT_OPTIONS */ 416