1 /* crypto/des/des_enc.c */ 2 /* Copyright (C) 1995-1998 Eric Young (eay (at) cryptsoft.com) 3 * All rights reserved. 4 * 5 * This package is an SSL implementation written 6 * by Eric Young (eay (at) 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 (at) 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 (at) 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 (at) 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 void DES_encrypt1(DES_LONG *data, DES_key_schedule *ks, int enc) 63 { 64 register DES_LONG l,r,t,u; 65 #ifdef DES_PTR 66 register const unsigned char *des_SP=(const unsigned char *)DES_SPtrans; 67 #endif 68 #ifndef DES_UNROLL 69 register int i; 70 #endif 71 register DES_LONG *s; 72 73 r=data[0]; 74 l=data[1]; 75 76 IP(r,l); 77 /* Things have been modified so that the initial rotate is 78 * done outside the loop. This required the 79 * DES_SPtrans values in sp.h to be rotated 1 bit to the right. 80 * One perl script later and things have a 5% speed up on a sparc2. 81 * Thanks to Richard Outerbridge <71755.204 (at) CompuServe.COM> 82 * for pointing this out. */ 83 /* clear the top bits on machines with 8byte longs */ 84 /* shift left by 2 */ 85 r=ROTATE(r,29)&0xffffffffL; 86 l=ROTATE(l,29)&0xffffffffL; 87 88 s=ks->ks->deslong; 89 /* I don't know if it is worth the effort of loop unrolling the 90 * inner loop */ 91 if (enc) 92 { 93 #ifdef DES_UNROLL 94 D_ENCRYPT(l,r, 0); /* 1 */ 95 D_ENCRYPT(r,l, 2); /* 2 */ 96 D_ENCRYPT(l,r, 4); /* 3 */ 97 D_ENCRYPT(r,l, 6); /* 4 */ 98 D_ENCRYPT(l,r, 8); /* 5 */ 99 D_ENCRYPT(r,l,10); /* 6 */ 100 D_ENCRYPT(l,r,12); /* 7 */ 101 D_ENCRYPT(r,l,14); /* 8 */ 102 D_ENCRYPT(l,r,16); /* 9 */ 103 D_ENCRYPT(r,l,18); /* 10 */ 104 D_ENCRYPT(l,r,20); /* 11 */ 105 D_ENCRYPT(r,l,22); /* 12 */ 106 D_ENCRYPT(l,r,24); /* 13 */ 107 D_ENCRYPT(r,l,26); /* 14 */ 108 D_ENCRYPT(l,r,28); /* 15 */ 109 D_ENCRYPT(r,l,30); /* 16 */ 110 #else 111 for (i=0; i<32; i+=4) 112 { 113 D_ENCRYPT(l,r,i+0); /* 1 */ 114 D_ENCRYPT(r,l,i+2); /* 2 */ 115 } 116 #endif 117 } 118 else 119 { 120 #ifdef DES_UNROLL 121 D_ENCRYPT(l,r,30); /* 16 */ 122 D_ENCRYPT(r,l,28); /* 15 */ 123 D_ENCRYPT(l,r,26); /* 14 */ 124 D_ENCRYPT(r,l,24); /* 13 */ 125 D_ENCRYPT(l,r,22); /* 12 */ 126 D_ENCRYPT(r,l,20); /* 11 */ 127 D_ENCRYPT(l,r,18); /* 10 */ 128 D_ENCRYPT(r,l,16); /* 9 */ 129 D_ENCRYPT(l,r,14); /* 8 */ 130 D_ENCRYPT(r,l,12); /* 7 */ 131 D_ENCRYPT(l,r,10); /* 6 */ 132 D_ENCRYPT(r,l, 8); /* 5 */ 133 D_ENCRYPT(l,r, 6); /* 4 */ 134 D_ENCRYPT(r,l, 4); /* 3 */ 135 D_ENCRYPT(l,r, 2); /* 2 */ 136 D_ENCRYPT(r,l, 0); /* 1 */ 137 #else 138 for (i=30; i>0; i-=4) 139 { 140 D_ENCRYPT(l,r,i-0); /* 16 */ 141 D_ENCRYPT(r,l,i-2); /* 15 */ 142 } 143 #endif 144 } 145 146 /* rotate and clear the top bits on machines with 8byte longs */ 147 l=ROTATE(l,3)&0xffffffffL; 148 r=ROTATE(r,3)&0xffffffffL; 149 150 FP(r,l); 151 data[0]=l; 152 data[1]=r; 153 l=r=t=u=0; 154 } 155 156 void DES_encrypt2(DES_LONG *data, DES_key_schedule *ks, int enc) 157 { 158 register DES_LONG l,r,t,u; 159 #ifdef DES_PTR 160 register const unsigned char *des_SP=(const unsigned char *)DES_SPtrans; 161 #endif 162 #ifndef DES_UNROLL 163 register int i; 164 #endif 165 register 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 (at) 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 { 185 #ifdef DES_UNROLL 186 D_ENCRYPT(l,r, 0); /* 1 */ 187 D_ENCRYPT(r,l, 2); /* 2 */ 188 D_ENCRYPT(l,r, 4); /* 3 */ 189 D_ENCRYPT(r,l, 6); /* 4 */ 190 D_ENCRYPT(l,r, 8); /* 5 */ 191 D_ENCRYPT(r,l,10); /* 6 */ 192 D_ENCRYPT(l,r,12); /* 7 */ 193 D_ENCRYPT(r,l,14); /* 8 */ 194 D_ENCRYPT(l,r,16); /* 9 */ 195 D_ENCRYPT(r,l,18); /* 10 */ 196 D_ENCRYPT(l,r,20); /* 11 */ 197 D_ENCRYPT(r,l,22); /* 12 */ 198 D_ENCRYPT(l,r,24); /* 13 */ 199 D_ENCRYPT(r,l,26); /* 14 */ 200 D_ENCRYPT(l,r,28); /* 15 */ 201 D_ENCRYPT(r,l,30); /* 16 */ 202 #else 203 for (i=0; i<32; i+=4) 204 { 205 D_ENCRYPT(l,r,i+0); /* 1 */ 206 D_ENCRYPT(r,l,i+2); /* 2 */ 207 } 208 #endif 209 } 210 else 211 { 212 #ifdef DES_UNROLL 213 D_ENCRYPT(l,r,30); /* 16 */ 214 D_ENCRYPT(r,l,28); /* 15 */ 215 D_ENCRYPT(l,r,26); /* 14 */ 216 D_ENCRYPT(r,l,24); /* 13 */ 217 D_ENCRYPT(l,r,22); /* 12 */ 218 D_ENCRYPT(r,l,20); /* 11 */ 219 D_ENCRYPT(l,r,18); /* 10 */ 220 D_ENCRYPT(r,l,16); /* 9 */ 221 D_ENCRYPT(l,r,14); /* 8 */ 222 D_ENCRYPT(r,l,12); /* 7 */ 223 D_ENCRYPT(l,r,10); /* 6 */ 224 D_ENCRYPT(r,l, 8); /* 5 */ 225 D_ENCRYPT(l,r, 6); /* 4 */ 226 D_ENCRYPT(r,l, 4); /* 3 */ 227 D_ENCRYPT(l,r, 2); /* 2 */ 228 D_ENCRYPT(r,l, 0); /* 1 */ 229 #else 230 for (i=30; i>0; i-=4) 231 { 232 D_ENCRYPT(l,r,i-0); /* 16 */ 233 D_ENCRYPT(r,l,i-2); /* 15 */ 234 } 235 #endif 236 } 237 /* rotate and clear the top bits on machines with 8byte longs */ 238 data[0]=ROTATE(l,3)&0xffffffffL; 239 data[1]=ROTATE(r,3)&0xffffffffL; 240 l=r=t=u=0; 241 } 242 243 void DES_encrypt3(DES_LONG *data, DES_key_schedule *ks1, 244 DES_key_schedule *ks2, DES_key_schedule *ks3) 245 { 246 register DES_LONG l,r; 247 248 l=data[0]; 249 r=data[1]; 250 IP(l,r); 251 data[0]=l; 252 data[1]=r; 253 DES_encrypt2((DES_LONG *)data,ks1,DES_ENCRYPT); 254 DES_encrypt2((DES_LONG *)data,ks2,DES_DECRYPT); 255 DES_encrypt2((DES_LONG *)data,ks3,DES_ENCRYPT); 256 l=data[0]; 257 r=data[1]; 258 FP(r,l); 259 data[0]=l; 260 data[1]=r; 261 } 262 263 void DES_decrypt3(DES_LONG *data, DES_key_schedule *ks1, 264 DES_key_schedule *ks2, DES_key_schedule *ks3) 265 { 266 register DES_LONG l,r; 267 268 l=data[0]; 269 r=data[1]; 270 IP(l,r); 271 data[0]=l; 272 data[1]=r; 273 DES_encrypt2((DES_LONG *)data,ks3,DES_DECRYPT); 274 DES_encrypt2((DES_LONG *)data,ks2,DES_ENCRYPT); 275 DES_encrypt2((DES_LONG *)data,ks1,DES_DECRYPT); 276 l=data[0]; 277 r=data[1]; 278 FP(r,l); 279 data[0]=l; 280 data[1]=r; 281 } 282 283 #ifndef DES_DEFAULT_OPTIONS 284 285 #undef CBC_ENC_C__DONT_UPDATE_IV 286 #include "ncbc_enc.c" /* DES_ncbc_encrypt */ 287 288 void DES_ede3_cbc_encrypt(const unsigned char *input, unsigned char *output, 289 long length, DES_key_schedule *ks1, 290 DES_key_schedule *ks2, DES_key_schedule *ks3, 291 DES_cblock *ivec, int enc) 292 { 293 register DES_LONG tin0,tin1; 294 register DES_LONG tout0,tout1,xor0,xor1; 295 register const unsigned char *in; 296 unsigned char *out; 297 register long l=length; 298 DES_LONG tin[2]; 299 unsigned char *iv; 300 301 in=input; 302 out=output; 303 iv = &(*ivec)[0]; 304 305 if (enc) 306 { 307 c2l(iv,tout0); 308 c2l(iv,tout1); 309 for (l-=8; l>=0; l-=8) 310 { 311 c2l(in,tin0); 312 c2l(in,tin1); 313 tin0^=tout0; 314 tin1^=tout1; 315 316 tin[0]=tin0; 317 tin[1]=tin1; 318 DES_encrypt3((DES_LONG *)tin,ks1,ks2,ks3); 319 tout0=tin[0]; 320 tout1=tin[1]; 321 322 l2c(tout0,out); 323 l2c(tout1,out); 324 } 325 if (l != -8) 326 { 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 } 344 else 345 { 346 register DES_LONG t0,t1; 347 348 c2l(iv,xor0); 349 c2l(iv,xor1); 350 for (l-=8; l>=0; l-=8) 351 { 352 c2l(in,tin0); 353 c2l(in,tin1); 354 355 t0=tin0; 356 t1=tin1; 357 358 tin[0]=tin0; 359 tin[1]=tin1; 360 DES_decrypt3((DES_LONG *)tin,ks1,ks2,ks3); 361 tout0=tin[0]; 362 tout1=tin[1]; 363 364 tout0^=xor0; 365 tout1^=xor1; 366 l2c(tout0,out); 367 l2c(tout1,out); 368 xor0=t0; 369 xor1=t1; 370 } 371 if (l != -8) 372 { 373 c2l(in,tin0); 374 c2l(in,tin1); 375 376 t0=tin0; 377 t1=tin1; 378 379 tin[0]=tin0; 380 tin[1]=tin1; 381 DES_decrypt3((DES_LONG *)tin,ks1,ks2,ks3); 382 tout0=tin[0]; 383 tout1=tin[1]; 384 385 tout0^=xor0; 386 tout1^=xor1; 387 l2cn(tout0,tout1,out,l+8); 388 xor0=t0; 389 xor1=t1; 390 } 391 392 iv = &(*ivec)[0]; 393 l2c(xor0,iv); 394 l2c(xor1,iv); 395 } 396 tin0=tin1=tout0=tout1=xor0=xor1=0; 397 tin[0]=tin[1]=0; 398 } 399 400 #endif /* DES_DEFAULT_OPTIONS */ 401
