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 void 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->ks->deslong; 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 } 158 159 void 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->ks->deslong; 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 } 249 250 void DES_encrypt3(DES_LONG *data, DES_key_schedule *ks1, 251 DES_key_schedule *ks2, 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 } 269 270 void DES_decrypt3(DES_LONG *data, DES_key_schedule *ks1, 271 DES_key_schedule *ks2, 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 "ncbc_enc.c" /* DES_ncbc_encrypt */ 294 295 void DES_ede3_cbc_encrypt(const unsigned char *input, unsigned char *output, 296 long length, DES_key_schedule *ks1, 297 DES_key_schedule *ks2, DES_key_schedule *ks3, 298 DES_cblock *ivec, int enc) 299 { 300 register DES_LONG tin0,tin1; 301 register DES_LONG tout0,tout1,xor0,xor1; 302 register const unsigned char *in; 303 unsigned char *out; 304 register long l=length; 305 DES_LONG tin[2]; 306 unsigned char *iv; 307 308 in=input; 309 out=output; 310 iv = &(*ivec)[0]; 311 312 if (enc) 313 { 314 c2l(iv,tout0); 315 c2l(iv,tout1); 316 for (l-=8; l>=0; l-=8) 317 { 318 c2l(in,tin0); 319 c2l(in,tin1); 320 tin0^=tout0; 321 tin1^=tout1; 322 323 tin[0]=tin0; 324 tin[1]=tin1; 325 DES_encrypt3((DES_LONG *)tin,ks1,ks2,ks3); 326 tout0=tin[0]; 327 tout1=tin[1]; 328 329 l2c(tout0,out); 330 l2c(tout1,out); 331 } 332 if (l != -8) 333 { 334 c2ln(in,tin0,tin1,l+8); 335 tin0^=tout0; 336 tin1^=tout1; 337 338 tin[0]=tin0; 339 tin[1]=tin1; 340 DES_encrypt3((DES_LONG *)tin,ks1,ks2,ks3); 341 tout0=tin[0]; 342 tout1=tin[1]; 343 344 l2c(tout0,out); 345 l2c(tout1,out); 346 } 347 iv = &(*ivec)[0]; 348 l2c(tout0,iv); 349 l2c(tout1,iv); 350 } 351 else 352 { 353 register DES_LONG t0,t1; 354 355 c2l(iv,xor0); 356 c2l(iv,xor1); 357 for (l-=8; l>=0; l-=8) 358 { 359 c2l(in,tin0); 360 c2l(in,tin1); 361 362 t0=tin0; 363 t1=tin1; 364 365 tin[0]=tin0; 366 tin[1]=tin1; 367 DES_decrypt3((DES_LONG *)tin,ks1,ks2,ks3); 368 tout0=tin[0]; 369 tout1=tin[1]; 370 371 tout0^=xor0; 372 tout1^=xor1; 373 l2c(tout0,out); 374 l2c(tout1,out); 375 xor0=t0; 376 xor1=t1; 377 } 378 if (l != -8) 379 { 380 c2l(in,tin0); 381 c2l(in,tin1); 382 383 t0=tin0; 384 t1=tin1; 385 386 tin[0]=tin0; 387 tin[1]=tin1; 388 DES_decrypt3((DES_LONG *)tin,ks1,ks2,ks3); 389 tout0=tin[0]; 390 tout1=tin[1]; 391 392 tout0^=xor0; 393 tout1^=xor1; 394 l2cn(tout0,tout1,out,l+8); 395 xor0=t0; 396 xor1=t1; 397 } 398 399 iv = &(*ivec)[0]; 400 l2c(xor0,iv); 401 l2c(xor1,iv); 402 } 403 tin0=tin1=tout0=tout1=xor0=xor1=0; 404 tin[0]=tin[1]=0; 405 } 406 407 #endif /* DES_DEFAULT_OPTIONS */ 408