1 /* $OpenBSD: des_enc.c,v 1.11 2014/06/12 15:49:28 deraadt 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_locl.h" 60 #include "spr.h" 61 62 #ifndef OPENBSD_DES_ASM 63 64 void DES_encrypt1(DES_LONG *data, DES_key_schedule *ks, int enc) 65 { 66 DES_LONG l,r,t,u; 67 #ifdef DES_PTR 68 const unsigned char *des_SP=(const unsigned char *)DES_SPtrans; 69 #endif 70 #ifndef DES_UNROLL 71 int i; 72 #endif 73 DES_LONG *s; 74 75 r=data[0]; 76 l=data[1]; 77 78 IP(r,l); 79 /* Things have been modified so that the initial rotate is 80 * done outside the loop. This required the 81 * DES_SPtrans values in sp.h to be rotated 1 bit to the right. 82 * One perl script later and things have a 5% speed up on a sparc2. 83 * Thanks to Richard Outerbridge <71755.204@CompuServe.COM> 84 * for pointing this out. */ 85 /* clear the top bits on machines with 8byte longs */ 86 /* shift left by 2 */ 87 r=ROTATE(r,29)&0xffffffffL; 88 l=ROTATE(l,29)&0xffffffffL; 89 90 s=ks->ks->deslong; 91 /* I don't know if it is worth the effort of loop unrolling the 92 * inner loop */ 93 if (enc) 94 { 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 { 115 D_ENCRYPT(l,r,i+0); /* 1 */ 116 D_ENCRYPT(r,l,i+2); /* 2 */ 117 } 118 #endif 119 } 120 else 121 { 122 #ifdef DES_UNROLL 123 D_ENCRYPT(l,r,30); /* 16 */ 124 D_ENCRYPT(r,l,28); /* 15 */ 125 D_ENCRYPT(l,r,26); /* 14 */ 126 D_ENCRYPT(r,l,24); /* 13 */ 127 D_ENCRYPT(l,r,22); /* 12 */ 128 D_ENCRYPT(r,l,20); /* 11 */ 129 D_ENCRYPT(l,r,18); /* 10 */ 130 D_ENCRYPT(r,l,16); /* 9 */ 131 D_ENCRYPT(l,r,14); /* 8 */ 132 D_ENCRYPT(r,l,12); /* 7 */ 133 D_ENCRYPT(l,r,10); /* 6 */ 134 D_ENCRYPT(r,l, 8); /* 5 */ 135 D_ENCRYPT(l,r, 6); /* 4 */ 136 D_ENCRYPT(r,l, 4); /* 3 */ 137 D_ENCRYPT(l,r, 2); /* 2 */ 138 D_ENCRYPT(r,l, 0); /* 1 */ 139 #else 140 for (i=30; i>0; i-=4) 141 { 142 D_ENCRYPT(l,r,i-0); /* 16 */ 143 D_ENCRYPT(r,l,i-2); /* 15 */ 144 } 145 #endif 146 } 147 148 /* rotate and clear the top bits on machines with 8byte longs */ 149 l=ROTATE(l,3)&0xffffffffL; 150 r=ROTATE(r,3)&0xffffffffL; 151 152 FP(r,l); 153 data[0]=l; 154 data[1]=r; 155 l=r=t=u=0; 156 } 157 158 void DES_encrypt2(DES_LONG *data, DES_key_schedule *ks, int enc) 159 { 160 DES_LONG l,r,t,u; 161 #ifdef DES_PTR 162 const unsigned char *des_SP=(const unsigned char *)DES_SPtrans; 163 #endif 164 #ifndef DES_UNROLL 165 int i; 166 #endif 167 DES_LONG *s; 168 169 r=data[0]; 170 l=data[1]; 171 172 /* Things have been modified so that the initial rotate is 173 * done outside the loop. This required the 174 * DES_SPtrans values in sp.h to be rotated 1 bit to the right. 175 * One perl script later and things have a 5% speed up on a sparc2. 176 * Thanks to Richard Outerbridge <71755.204@CompuServe.COM> 177 * for pointing this out. */ 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 /* I don't know if it is worth the effort of loop unrolling the 184 * inner loop */ 185 if (enc) 186 { 187 #ifdef DES_UNROLL 188 D_ENCRYPT(l,r, 0); /* 1 */ 189 D_ENCRYPT(r,l, 2); /* 2 */ 190 D_ENCRYPT(l,r, 4); /* 3 */ 191 D_ENCRYPT(r,l, 6); /* 4 */ 192 D_ENCRYPT(l,r, 8); /* 5 */ 193 D_ENCRYPT(r,l,10); /* 6 */ 194 D_ENCRYPT(l,r,12); /* 7 */ 195 D_ENCRYPT(r,l,14); /* 8 */ 196 D_ENCRYPT(l,r,16); /* 9 */ 197 D_ENCRYPT(r,l,18); /* 10 */ 198 D_ENCRYPT(l,r,20); /* 11 */ 199 D_ENCRYPT(r,l,22); /* 12 */ 200 D_ENCRYPT(l,r,24); /* 13 */ 201 D_ENCRYPT(r,l,26); /* 14 */ 202 D_ENCRYPT(l,r,28); /* 15 */ 203 D_ENCRYPT(r,l,30); /* 16 */ 204 #else 205 for (i=0; i<32; i+=4) 206 { 207 D_ENCRYPT(l,r,i+0); /* 1 */ 208 D_ENCRYPT(r,l,i+2); /* 2 */ 209 } 210 #endif 211 } 212 else 213 { 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-=4) 233 { 234 D_ENCRYPT(l,r,i-0); /* 16 */ 235 D_ENCRYPT(r,l,i-2); /* 15 */ 236 } 237 #endif 238 } 239 /* rotate and clear the top bits on machines with 8byte longs */ 240 data[0]=ROTATE(l,3)&0xffffffffL; 241 data[1]=ROTATE(r,3)&0xffffffffL; 242 l=r=t=u=0; 243 } 244 245 #endif /* OPENBSD_DES_ASM */ 246 247 void DES_encrypt3(DES_LONG *data, DES_key_schedule *ks1, 248 DES_key_schedule *ks2, DES_key_schedule *ks3) 249 { 250 DES_LONG l,r; 251 252 l=data[0]; 253 r=data[1]; 254 IP(l,r); 255 data[0]=l; 256 data[1]=r; 257 DES_encrypt2((DES_LONG *)data,ks1,DES_ENCRYPT); 258 DES_encrypt2((DES_LONG *)data,ks2,DES_DECRYPT); 259 DES_encrypt2((DES_LONG *)data,ks3,DES_ENCRYPT); 260 l=data[0]; 261 r=data[1]; 262 FP(r,l); 263 data[0]=l; 264 data[1]=r; 265 } 266 267 void DES_decrypt3(DES_LONG *data, DES_key_schedule *ks1, 268 DES_key_schedule *ks2, DES_key_schedule *ks3) 269 { 270 DES_LONG l,r; 271 272 l=data[0]; 273 r=data[1]; 274 IP(l,r); 275 data[0]=l; 276 data[1]=r; 277 DES_encrypt2((DES_LONG *)data,ks3,DES_DECRYPT); 278 DES_encrypt2((DES_LONG *)data,ks2,DES_ENCRYPT); 279 DES_encrypt2((DES_LONG *)data,ks1,DES_DECRYPT); 280 l=data[0]; 281 r=data[1]; 282 FP(r,l); 283 data[0]=l; 284 data[1]=r; 285 } 286 287 #ifndef DES_DEFAULT_OPTIONS 288 289 #undef CBC_ENC_C__DONT_UPDATE_IV 290 #include "ncbc_enc.c" /* DES_ncbc_encrypt */ 291 292 void DES_ede3_cbc_encrypt(const unsigned char *input, unsigned char *output, 293 long length, DES_key_schedule *ks1, 294 DES_key_schedule *ks2, DES_key_schedule *ks3, 295 DES_cblock *ivec, int enc) 296 { 297 DES_LONG tin0,tin1; 298 DES_LONG tout0,tout1,xor0,xor1; 299 const unsigned char *in; 300 unsigned char *out; 301 long l=length; 302 DES_LONG tin[2]; 303 unsigned char *iv; 304 305 in=input; 306 out=output; 307 iv = &(*ivec)[0]; 308 309 if (enc) 310 { 311 c2l(iv,tout0); 312 c2l(iv,tout1); 313 for (l-=8; l>=0; l-=8) 314 { 315 c2l(in,tin0); 316 c2l(in,tin1); 317 tin0^=tout0; 318 tin1^=tout1; 319 320 tin[0]=tin0; 321 tin[1]=tin1; 322 DES_encrypt3((DES_LONG *)tin,ks1,ks2,ks3); 323 tout0=tin[0]; 324 tout1=tin[1]; 325 326 l2c(tout0,out); 327 l2c(tout1,out); 328 } 329 if (l != -8) 330 { 331 c2ln(in,tin0,tin1,l+8); 332 tin0^=tout0; 333 tin1^=tout1; 334 335 tin[0]=tin0; 336 tin[1]=tin1; 337 DES_encrypt3((DES_LONG *)tin,ks1,ks2,ks3); 338 tout0=tin[0]; 339 tout1=tin[1]; 340 341 l2c(tout0,out); 342 l2c(tout1,out); 343 } 344 iv = &(*ivec)[0]; 345 l2c(tout0,iv); 346 l2c(tout1,iv); 347 } 348 else 349 { 350 DES_LONG t0,t1; 351 352 c2l(iv,xor0); 353 c2l(iv,xor1); 354 for (l-=8; l>=0; l-=8) 355 { 356 c2l(in,tin0); 357 c2l(in,tin1); 358 359 t0=tin0; 360 t1=tin1; 361 362 tin[0]=tin0; 363 tin[1]=tin1; 364 DES_decrypt3((DES_LONG *)tin,ks1,ks2,ks3); 365 tout0=tin[0]; 366 tout1=tin[1]; 367 368 tout0^=xor0; 369 tout1^=xor1; 370 l2c(tout0,out); 371 l2c(tout1,out); 372 xor0=t0; 373 xor1=t1; 374 } 375 if (l != -8) 376 { 377 c2l(in,tin0); 378 c2l(in,tin1); 379 380 t0=tin0; 381 t1=tin1; 382 383 tin[0]=tin0; 384 tin[1]=tin1; 385 DES_decrypt3((DES_LONG *)tin,ks1,ks2,ks3); 386 tout0=tin[0]; 387 tout1=tin[1]; 388 389 tout0^=xor0; 390 tout1^=xor1; 391 l2cn(tout0,tout1,out,l+8); 392 xor0=t0; 393 xor1=t1; 394 } 395 396 iv = &(*ivec)[0]; 397 l2c(xor0,iv); 398 l2c(xor1,iv); 399 } 400 tin0=tin1=tout0=tout1=xor0=xor1=0; 401 tin[0]=tin[1]=0; 402 } 403 404 #endif /* DES_DEFAULT_OPTIONS */ 405