Skip to content
This repository

HTTPS clone URL

Subversion checkout URL

You can clone with HTTPS or Subversion.

Download ZIP
branch: ics
Fetching contributors…

Octocat-spinner-32-eaf2f5

Cannot retrieve contributors at this time

file 477 lines (413 sloc) 14.839 kb
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476
/*
* DES and 3DES-EDE ciphers
*
* Modifications to LibTomCrypt implementation:
* Copyright (c) 2006, Jouni Malinen <j@w1.fi>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Alternatively, this software may be distributed under the terms of BSD
* license.
*
* See README and COPYING for more details.
*/

#include "includes.h"

#include "common.h"
#include "crypto.h"


#ifdef INTERNAL_DES

/*
* This implementation is based on a DES implementation included in
* LibTomCrypt. The version here is modified to fit in wpa_supplicant/hostapd
* coding style.
*/

/* LibTomCrypt, modular cryptographic library -- Tom St Denis
*
* LibTomCrypt is a library that provides various cryptographic
* algorithms in a highly modular and flexible manner.
*
* The library is free for all purposes without any express
* guarantee it works.
*
* Tom St Denis, tomstdenis@gmail.com, http://libtomcrypt.com
*/

/**
DES code submitted by Dobes Vandermeer
*/

#define ROLc(x, y) \
((((unsigned long) (x) << (unsigned long) ((y) & 31)) | \
(((unsigned long) (x) & 0xFFFFFFFFUL) >> \
(unsigned long) (32 - ((y) & 31)))) & 0xFFFFFFFFUL)
#define RORc(x, y) \
(((((unsigned long) (x) & 0xFFFFFFFFUL) >> \
(unsigned long) ((y) & 31)) | \
((unsigned long) (x) << (unsigned long) (32 - ((y) & 31)))) & \
0xFFFFFFFFUL)


static const u32 bytebit[8] =
{
0200, 0100, 040, 020, 010, 04, 02, 01
};

static const u32 bigbyte[24] =
{
0x800000UL, 0x400000UL, 0x200000UL, 0x100000UL,
0x80000UL, 0x40000UL, 0x20000UL, 0x10000UL,
0x8000UL, 0x4000UL, 0x2000UL, 0x1000UL,
0x800UL, 0x400UL, 0x200UL, 0x100UL,
0x80UL, 0x40UL, 0x20UL, 0x10UL,
0x8UL, 0x4UL, 0x2UL, 0x1L
};

/* Use the key schedule specific in the standard (ANSI X3.92-1981) */

static const u8 pc1[56] = {
56, 48, 40, 32, 24, 16, 8, 0, 57, 49, 41, 33, 25, 17,
9, 1, 58, 50, 42, 34, 26, 18, 10, 2, 59, 51, 43, 35,
62, 54, 46, 38, 30, 22, 14, 6, 61, 53, 45, 37, 29, 21,
13, 5, 60, 52, 44, 36, 28, 20, 12, 4, 27, 19, 11, 3
};

static const u8 totrot[16] = {
1, 2, 4, 6,
8, 10, 12, 14,
15, 17, 19, 21,
23, 25, 27, 28
};

static const u8 pc2[48] = {
13, 16, 10, 23, 0, 4, 2, 27, 14, 5, 20, 9,
22, 18, 11, 3, 25, 7, 15, 6, 26, 19, 12, 1,
40, 51, 30, 36, 46, 54, 29, 39, 50, 44, 32, 47,
43, 48, 38, 55, 33, 52, 45, 41, 49, 35, 28, 31
};


static const u32 SP1[64] =
{
0x01010400UL, 0x00000000UL, 0x00010000UL, 0x01010404UL,
0x01010004UL, 0x00010404UL, 0x00000004UL, 0x00010000UL,
0x00000400UL, 0x01010400UL, 0x01010404UL, 0x00000400UL,
0x01000404UL, 0x01010004UL, 0x01000000UL, 0x00000004UL,
0x00000404UL, 0x01000400UL, 0x01000400UL, 0x00010400UL,
0x00010400UL, 0x01010000UL, 0x01010000UL, 0x01000404UL,
0x00010004UL, 0x01000004UL, 0x01000004UL, 0x00010004UL,
0x00000000UL, 0x00000404UL, 0x00010404UL, 0x01000000UL,
0x00010000UL, 0x01010404UL, 0x00000004UL, 0x01010000UL,
0x01010400UL, 0x01000000UL, 0x01000000UL, 0x00000400UL,
0x01010004UL, 0x00010000UL, 0x00010400UL, 0x01000004UL,
0x00000400UL, 0x00000004UL, 0x01000404UL, 0x00010404UL,
0x01010404UL, 0x00010004UL, 0x01010000UL, 0x01000404UL,
0x01000004UL, 0x00000404UL, 0x00010404UL, 0x01010400UL,
0x00000404UL, 0x01000400UL, 0x01000400UL, 0x00000000UL,
0x00010004UL, 0x00010400UL, 0x00000000UL, 0x01010004UL
};

static const u32 SP2[64] =
{
0x80108020UL, 0x80008000UL, 0x00008000UL, 0x00108020UL,
0x00100000UL, 0x00000020UL, 0x80100020UL, 0x80008020UL,
0x80000020UL, 0x80108020UL, 0x80108000UL, 0x80000000UL,
0x80008000UL, 0x00100000UL, 0x00000020UL, 0x80100020UL,
0x00108000UL, 0x00100020UL, 0x80008020UL, 0x00000000UL,
0x80000000UL, 0x00008000UL, 0x00108020UL, 0x80100000UL,
0x00100020UL, 0x80000020UL, 0x00000000UL, 0x00108000UL,
0x00008020UL, 0x80108000UL, 0x80100000UL, 0x00008020UL,
0x00000000UL, 0x00108020UL, 0x80100020UL, 0x00100000UL,
0x80008020UL, 0x80100000UL, 0x80108000UL, 0x00008000UL,
0x80100000UL, 0x80008000UL, 0x00000020UL, 0x80108020UL,
0x00108020UL, 0x00000020UL, 0x00008000UL, 0x80000000UL,
0x00008020UL, 0x80108000UL, 0x00100000UL, 0x80000020UL,
0x00100020UL, 0x80008020UL, 0x80000020UL, 0x00100020UL,
0x00108000UL, 0x00000000UL, 0x80008000UL, 0x00008020UL,
0x80000000UL, 0x80100020UL, 0x80108020UL, 0x00108000UL
};

static const u32 SP3[64] =
{
0x00000208UL, 0x08020200UL, 0x00000000UL, 0x08020008UL,
0x08000200UL, 0x00000000UL, 0x00020208UL, 0x08000200UL,
0x00020008UL, 0x08000008UL, 0x08000008UL, 0x00020000UL,
0x08020208UL, 0x00020008UL, 0x08020000UL, 0x00000208UL,
0x08000000UL, 0x00000008UL, 0x08020200UL, 0x00000200UL,
0x00020200UL, 0x08020000UL, 0x08020008UL, 0x00020208UL,
0x08000208UL, 0x00020200UL, 0x00020000UL, 0x08000208UL,
0x00000008UL, 0x08020208UL, 0x00000200UL, 0x08000000UL,
0x08020200UL, 0x08000000UL, 0x00020008UL, 0x00000208UL,
0x00020000UL, 0x08020200UL, 0x08000200UL, 0x00000000UL,
0x00000200UL, 0x00020008UL, 0x08020208UL, 0x08000200UL,
0x08000008UL, 0x00000200UL, 0x00000000UL, 0x08020008UL,
0x08000208UL, 0x00020000UL, 0x08000000UL, 0x08020208UL,
0x00000008UL, 0x00020208UL, 0x00020200UL, 0x08000008UL,
0x08020000UL, 0x08000208UL, 0x00000208UL, 0x08020000UL,
0x00020208UL, 0x00000008UL, 0x08020008UL, 0x00020200UL
};

static const u32 SP4[64] =
{
0x00802001UL, 0x00002081UL, 0x00002081UL, 0x00000080UL,
0x00802080UL, 0x00800081UL, 0x00800001UL, 0x00002001UL,
0x00000000UL, 0x00802000UL, 0x00802000UL, 0x00802081UL,
0x00000081UL, 0x00000000UL, 0x00800080UL, 0x00800001UL,
0x00000001UL, 0x00002000UL, 0x00800000UL, 0x00802001UL,
0x00000080UL, 0x00800000UL, 0x00002001UL, 0x00002080UL,
0x00800081UL, 0x00000001UL, 0x00002080UL, 0x00800080UL,
0x00002000UL, 0x00802080UL, 0x00802081UL, 0x00000081UL,
0x00800080UL, 0x00800001UL, 0x00802000UL, 0x00802081UL,
0x00000081UL, 0x00000000UL, 0x00000000UL, 0x00802000UL,
0x00002080UL, 0x00800080UL, 0x00800081UL, 0x00000001UL,
0x00802001UL, 0x00002081UL, 0x00002081UL, 0x00000080UL,
0x00802081UL, 0x00000081UL, 0x00000001UL, 0x00002000UL,
0x00800001UL, 0x00002001UL, 0x00802080UL, 0x00800081UL,
0x00002001UL, 0x00002080UL, 0x00800000UL, 0x00802001UL,
0x00000080UL, 0x00800000UL, 0x00002000UL, 0x00802080UL
};

static const u32 SP5[64] =
{
0x00000100UL, 0x02080100UL, 0x02080000UL, 0x42000100UL,
0x00080000UL, 0x00000100UL, 0x40000000UL, 0x02080000UL,
0x40080100UL, 0x00080000UL, 0x02000100UL, 0x40080100UL,
0x42000100UL, 0x42080000UL, 0x00080100UL, 0x40000000UL,
0x02000000UL, 0x40080000UL, 0x40080000UL, 0x00000000UL,
0x40000100UL, 0x42080100UL, 0x42080100UL, 0x02000100UL,
0x42080000UL, 0x40000100UL, 0x00000000UL, 0x42000000UL,
0x02080100UL, 0x02000000UL, 0x42000000UL, 0x00080100UL,
0x00080000UL, 0x42000100UL, 0x00000100UL, 0x02000000UL,
0x40000000UL, 0x02080000UL, 0x42000100UL, 0x40080100UL,
0x02000100UL, 0x40000000UL, 0x42080000UL, 0x02080100UL,
0x40080100UL, 0x00000100UL, 0x02000000UL, 0x42080000UL,
0x42080100UL, 0x00080100UL, 0x42000000UL, 0x42080100UL,
0x02080000UL, 0x00000000UL, 0x40080000UL, 0x42000000UL,
0x00080100UL, 0x02000100UL, 0x40000100UL, 0x00080000UL,
0x00000000UL, 0x40080000UL, 0x02080100UL, 0x40000100UL
};

static const u32 SP6[64] =
{
0x20000010UL, 0x20400000UL, 0x00004000UL, 0x20404010UL,
0x20400000UL, 0x00000010UL, 0x20404010UL, 0x00400000UL,
0x20004000UL, 0x00404010UL, 0x00400000UL, 0x20000010UL,
0x00400010UL, 0x20004000UL, 0x20000000UL, 0x00004010UL,
0x00000000UL, 0x00400010UL, 0x20004010UL, 0x00004000UL,
0x00404000UL, 0x20004010UL, 0x00000010UL, 0x20400010UL,
0x20400010UL, 0x00000000UL, 0x00404010UL, 0x20404000UL,
0x00004010UL, 0x00404000UL, 0x20404000UL, 0x20000000UL,
0x20004000UL, 0x00000010UL, 0x20400010UL, 0x00404000UL,
0x20404010UL, 0x00400000UL, 0x00004010UL, 0x20000010UL,
0x00400000UL, 0x20004000UL, 0x20000000UL, 0x00004010UL,
0x20000010UL, 0x20404010UL, 0x00404000UL, 0x20400000UL,
0x00404010UL, 0x20404000UL, 0x00000000UL, 0x20400010UL,
0x00000010UL, 0x00004000UL, 0x20400000UL, 0x00404010UL,
0x00004000UL, 0x00400010UL, 0x20004010UL, 0x00000000UL,
0x20404000UL, 0x20000000UL, 0x00400010UL, 0x20004010UL
};

static const u32 SP7[64] =
{
0x00200000UL, 0x04200002UL, 0x04000802UL, 0x00000000UL,
0x00000800UL, 0x04000802UL, 0x00200802UL, 0x04200800UL,
0x04200802UL, 0x00200000UL, 0x00000000UL, 0x04000002UL,
0x00000002UL, 0x04000000UL, 0x04200002UL, 0x00000802UL,
0x04000800UL, 0x00200802UL, 0x00200002UL, 0x04000800UL,
0x04000002UL, 0x04200000UL, 0x04200800UL, 0x00200002UL,
0x04200000UL, 0x00000800UL, 0x00000802UL, 0x04200802UL,
0x00200800UL, 0x00000002UL, 0x04000000UL, 0x00200800UL,
0x04000000UL, 0x00200800UL, 0x00200000UL, 0x04000802UL,
0x04000802UL, 0x04200002UL, 0x04200002UL, 0x00000002UL,
0x00200002UL, 0x04000000UL, 0x04000800UL, 0x00200000UL,
0x04200800UL, 0x00000802UL, 0x00200802UL, 0x04200800UL,
0x00000802UL, 0x04000002UL, 0x04200802UL, 0x04200000UL,
0x00200800UL, 0x00000000UL, 0x00000002UL, 0x04200802UL,
0x00000000UL, 0x00200802UL, 0x04200000UL, 0x00000800UL,
0x04000002UL, 0x04000800UL, 0x00000800UL, 0x00200002UL
};

static const u32 SP8[64] =
{
0x10001040UL, 0x00001000UL, 0x00040000UL, 0x10041040UL,
0x10000000UL, 0x10001040UL, 0x00000040UL, 0x10000000UL,
0x00040040UL, 0x10040000UL, 0x10041040UL, 0x00041000UL,
0x10041000UL, 0x00041040UL, 0x00001000UL, 0x00000040UL,
0x10040000UL, 0x10000040UL, 0x10001000UL, 0x00001040UL,
0x00041000UL, 0x00040040UL, 0x10040040UL, 0x10041000UL,
0x00001040UL, 0x00000000UL, 0x00000000UL, 0x10040040UL,
0x10000040UL, 0x10001000UL, 0x00041040UL, 0x00040000UL,
0x00041040UL, 0x00040000UL, 0x10041000UL, 0x00001000UL,
0x00000040UL, 0x10040040UL, 0x00001000UL, 0x00041040UL,
0x10001000UL, 0x00000040UL, 0x10000040UL, 0x10040000UL,
0x10040040UL, 0x10000000UL, 0x00040000UL, 0x10001040UL,
0x00000000UL, 0x10041040UL, 0x00040040UL, 0x10000040UL,
0x10040000UL, 0x10001000UL, 0x10001040UL, 0x00000000UL,
0x10041040UL, 0x00041000UL, 0x00041000UL, 0x00001040UL,
0x00001040UL, 0x00040040UL, 0x10000000UL, 0x10041000UL
};


static void cookey(const u32 *raw1, u32 *keyout)
{
u32 *cook;
const u32 *raw0;
u32 dough[32];
int i;

cook = dough;
for (i = 0; i < 16; i++, raw1++) {
raw0 = raw1++;
*cook = (*raw0 & 0x00fc0000L) << 6;
*cook |= (*raw0 & 0x00000fc0L) << 10;
*cook |= (*raw1 & 0x00fc0000L) >> 10;
*cook++ |= (*raw1 & 0x00000fc0L) >> 6;
*cook = (*raw0 & 0x0003f000L) << 12;
*cook |= (*raw0 & 0x0000003fL) << 16;
*cook |= (*raw1 & 0x0003f000L) >> 4;
*cook++ |= (*raw1 & 0x0000003fL);
}

os_memcpy(keyout, dough, sizeof(dough));
}


static void deskey(const u8 *key, int decrypt, u32 *keyout)
{
u32 i, j, l, m, n, kn[32];
u8 pc1m[56], pcr[56];

for (j = 0; j < 56; j++) {
l = (u32) pc1[j];
m = l & 7;
pc1m[j] = (u8)
((key[l >> 3U] & bytebit[m]) == bytebit[m] ? 1 : 0);
}

for (i = 0; i < 16; i++) {
if (decrypt)
m = (15 - i) << 1;
else
m = i << 1;
n = m + 1;
kn[m] = kn[n] = 0L;
for (j = 0; j < 28; j++) {
l = j + (u32) totrot[i];
if (l < 28)
pcr[j] = pc1m[l];
else
pcr[j] = pc1m[l - 28];
}
for (/* j = 28 */; j < 56; j++) {
l = j + (u32) totrot[i];
if (l < 56)
pcr[j] = pc1m[l];
else
pcr[j] = pc1m[l - 28];
}
for (j = 0; j < 24; j++) {
if ((int) pcr[(int) pc2[j]] != 0)
kn[m] |= bigbyte[j];
if ((int) pcr[(int) pc2[j + 24]] != 0)
kn[n] |= bigbyte[j];
}
}

cookey(kn, keyout);
}


static void desfunc(u32 *block, const u32 *keys)
{
u32 work, right, leftt;
int cur_round;

leftt = block[0];
right = block[1];

work = ((leftt >> 4) ^ right) & 0x0f0f0f0fL;
right ^= work;
leftt ^= (work << 4);

work = ((leftt >> 16) ^ right) & 0x0000ffffL;
right ^= work;
leftt ^= (work << 16);

work = ((right >> 2) ^ leftt) & 0x33333333L;
leftt ^= work;
right ^= (work << 2);

work = ((right >> 8) ^ leftt) & 0x00ff00ffL;
leftt ^= work;
right ^= (work << 8);

right = ROLc(right, 1);
work = (leftt ^ right) & 0xaaaaaaaaL;

leftt ^= work;
right ^= work;
leftt = ROLc(leftt, 1);

for (cur_round = 0; cur_round < 8; cur_round++) {
work = RORc(right, 4) ^ *keys++;
leftt ^= SP7[work & 0x3fL]
^ SP5[(work >> 8) & 0x3fL]
^ SP3[(work >> 16) & 0x3fL]
^ SP1[(work >> 24) & 0x3fL];
work = right ^ *keys++;
leftt ^= SP8[ work & 0x3fL]
^ SP6[(work >> 8) & 0x3fL]
^ SP4[(work >> 16) & 0x3fL]
^ SP2[(work >> 24) & 0x3fL];

work = RORc(leftt, 4) ^ *keys++;
right ^= SP7[ work & 0x3fL]
^ SP5[(work >> 8) & 0x3fL]
^ SP3[(work >> 16) & 0x3fL]
^ SP1[(work >> 24) & 0x3fL];
work = leftt ^ *keys++;
right ^= SP8[ work & 0x3fL]
^ SP6[(work >> 8) & 0x3fL]
^ SP4[(work >> 16) & 0x3fL]
^ SP2[(work >> 24) & 0x3fL];
}

right = RORc(right, 1);
work = (leftt ^ right) & 0xaaaaaaaaL;
leftt ^= work;
right ^= work;
leftt = RORc(leftt, 1);
work = ((leftt >> 8) ^ right) & 0x00ff00ffL;
right ^= work;
leftt ^= (work << 8);
/* -- */
work = ((leftt >> 2) ^ right) & 0x33333333L;
right ^= work;
leftt ^= (work << 2);
work = ((right >> 16) ^ leftt) & 0x0000ffffL;
leftt ^= work;
right ^= (work << 16);
work = ((right >> 4) ^ leftt) & 0x0f0f0f0fL;
leftt ^= work;
right ^= (work << 4);

block[0] = right;
block[1] = leftt;
}


/* wpa_supplicant/hostapd specific wrapper */

void des_encrypt(const u8 *clear, const u8 *key, u8 *cypher)
{
u8 pkey[8], next, tmp;
int i;
u32 ek[32], work[2];

/* Add parity bits to the key */
next = 0;
for (i = 0; i < 7; i++) {
tmp = key[i];
pkey[i] = (tmp >> i) | next | 1;
next = tmp << (7 - i);
}
pkey[i] = next | 1;

deskey(pkey, 0, ek);

work[0] = WPA_GET_BE32(clear);
work[1] = WPA_GET_BE32(clear + 4);
desfunc(work, ek);
WPA_PUT_BE32(cypher, work[0]);
WPA_PUT_BE32(cypher + 4, work[1]);
}


struct des3_key_s {
u32 ek[3][32];
u32 dk[3][32];
};

void des3_key_setup(const u8 *key, struct des3_key_s *dkey)
{
deskey(key, 0, dkey->ek[0]);
deskey(key + 8, 1, dkey->ek[1]);
deskey(key + 16, 0, dkey->ek[2]);

deskey(key, 1, dkey->dk[2]);
deskey(key + 8, 0, dkey->dk[1]);
deskey(key + 16, 1, dkey->dk[0]);
}


void des3_encrypt(const u8 *plain, const struct des3_key_s *key, u8 *crypt)
{
u32 work[2];

work[0] = WPA_GET_BE32(plain);
work[1] = WPA_GET_BE32(plain + 4);
desfunc(work, key->ek[0]);
desfunc(work, key->ek[1]);
desfunc(work, key->ek[2]);
WPA_PUT_BE32(crypt, work[0]);
WPA_PUT_BE32(crypt + 4, work[1]);
}


void des3_decrypt(const u8 *crypt, const struct des3_key_s *key, u8 *plain)
{
u32 work[2];

work[0] = WPA_GET_BE32(crypt);
work[1] = WPA_GET_BE32(crypt + 4);
desfunc(work, key->dk[0]);
desfunc(work, key->dk[1]);
desfunc(work, key->dk[2]);
WPA_PUT_BE32(plain, work[0]);
WPA_PUT_BE32(plain + 4, work[1]);
}

#endif /* INTERNAL_DES */
Something went wrong with that request. Please try again.