1 /* LibTomCrypt, modular cryptographic library -- Tom St Denis 2 * 3 * LibTomCrypt is a library that provides various cryptographic 4 * algorithms in a highly modular and flexible manner. 5 * 6 * The library is free for all purposes without any express 7 * guarantee it works. 8 * 9 * Tom St Denis, tomstdenis (at) gmail.com, http://libtomcrypt.com 10 */ 11 12 /* AES implementation by Tom St Denis 13 * 14 * Derived from the Public Domain source code by 15 16 --- 17 * rijndael-alg-fst.c 18 * 19 * @version 3.0 (December 2000) 20 * 21 * Optimised ANSI C code for the Rijndael cipher (now AES) 22 * 23 * @author Vincent Rijmen <vincent.rijmen (at) esat.kuleuven.ac.be> 24 * @author Antoon Bosselaers <antoon.bosselaers (at) esat.kuleuven.ac.be> 25 * @author Paulo Barreto <paulo.barreto (at) terra.com.br> 26 --- 27 */ 28 /** 29 @file aes.c 30 Implementation of AES 31 */ 32 33 #include "tomcrypt.h" 34 35 #ifdef RIJNDAEL 36 37 #ifndef ENCRYPT_ONLY 38 39 #define SETUP rijndael_setup 40 #define ECB_ENC rijndael_ecb_encrypt 41 #define ECB_DEC rijndael_ecb_decrypt 42 #define ECB_DONE rijndael_done 43 #define ECB_TEST rijndael_test 44 #define ECB_KS rijndael_keysize 45 46 #if 0 47 const struct ltc_cipher_descriptor rijndael_desc = 48 { 49 "rijndael", 50 6, 51 16, 32, 16, 10, 52 SETUP, ECB_ENC, ECB_DEC, ECB_TEST, ECB_DONE, ECB_KS, 53 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL 54 }; 55 #endif 56 57 const struct ltc_cipher_descriptor aes_desc = 58 { 59 "aes", 60 6, 61 16, 32, 16, 10, 62 SETUP, ECB_ENC, ECB_DEC, ECB_TEST, ECB_DONE, ECB_KS, 63 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL 64 }; 65 66 #else 67 68 #define SETUP rijndael_enc_setup 69 #define ECB_ENC rijndael_enc_ecb_encrypt 70 #define ECB_KS rijndael_enc_keysize 71 #define ECB_DONE rijndael_enc_done 72 73 const struct ltc_cipher_descriptor rijndael_enc_desc = 74 { 75 "rijndael", 76 6, 77 16, 32, 16, 10, 78 SETUP, ECB_ENC, NULL, NULL, ECB_DONE, ECB_KS, 79 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL 80 }; 81 82 const struct ltc_cipher_descriptor aes_enc_desc = 83 { 84 "aes", 85 6, 86 16, 32, 16, 10, 87 SETUP, ECB_ENC, NULL, NULL, ECB_DONE, ECB_KS, 88 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL 89 }; 90 91 #endif 92 93 #include "aes_tab.c" 94 95 static ulong32 setup_mix(ulong32 temp) 96 { 97 return (Te4_3[byte(temp, 2)]) ^ 98 (Te4_2[byte(temp, 1)]) ^ 99 (Te4_1[byte(temp, 0)]) ^ 100 (Te4_0[byte(temp, 3)]); 101 } 102 103 #ifndef ENCRYPT_ONLY 104 #ifdef LTC_SMALL_CODE 105 static ulong32 setup_mix2(ulong32 temp) 106 { 107 return Td0(255 & Te4[byte(temp, 3)]) ^ 108 Td1(255 & Te4[byte(temp, 2)]) ^ 109 Td2(255 & Te4[byte(temp, 1)]) ^ 110 Td3(255 & Te4[byte(temp, 0)]); 111 } 112 #endif 113 #endif 114 115 /** 116 Initialize the AES (Rijndael) block cipher 117 @param key The symmetric key you wish to pass 118 @param keylen The key length in bytes 119 @param num_rounds The number of rounds desired (0 for default) 120 @param skey The key in as scheduled by this function. 121 @return CRYPT_OK if successful 122 */ 123 int SETUP(const unsigned char *key, int keylen, int num_rounds, symmetric_key *skey) 124 { 125 int i, j; 126 ulong32 temp, *rk; 127 #ifndef ENCRYPT_ONLY 128 ulong32 *rrk; 129 #endif 130 LTC_ARGCHK(key != NULL); 131 LTC_ARGCHK(skey != NULL); 132 133 if (keylen != 16 && keylen != 24 && keylen != 32) { 134 return CRYPT_INVALID_KEYSIZE; 135 } 136 137 if (num_rounds != 0 && num_rounds != (10 + ((keylen/8)-2)*2)) { 138 return CRYPT_INVALID_ROUNDS; 139 } 140 141 skey->rijndael.Nr = 10 + ((keylen/8)-2)*2; 142 143 /* setup the forward key */ 144 i = 0; 145 rk = skey->rijndael.eK; 146 LOAD32H(rk[0], key ); 147 LOAD32H(rk[1], key + 4); 148 LOAD32H(rk[2], key + 8); 149 LOAD32H(rk[3], key + 12); 150 if (keylen == 16) { 151 j = 44; 152 for (;;) { 153 temp = rk[3]; 154 rk[4] = rk[0] ^ setup_mix(temp) ^ rcon[i]; 155 rk[5] = rk[1] ^ rk[4]; 156 rk[6] = rk[2] ^ rk[5]; 157 rk[7] = rk[3] ^ rk[6]; 158 if (++i == 10) { 159 break; 160 } 161 rk += 4; 162 } 163 } else if (keylen == 24) { 164 j = 52; 165 LOAD32H(rk[4], key + 16); 166 LOAD32H(rk[5], key + 20); 167 for (;;) { 168 #ifdef _MSC_VER 169 temp = skey->rijndael.eK[rk - skey->rijndael.eK + 5]; 170 #else 171 temp = rk[5]; 172 #endif 173 rk[ 6] = rk[ 0] ^ setup_mix(temp) ^ rcon[i]; 174 rk[ 7] = rk[ 1] ^ rk[ 6]; 175 rk[ 8] = rk[ 2] ^ rk[ 7]; 176 rk[ 9] = rk[ 3] ^ rk[ 8]; 177 if (++i == 8) { 178 break; 179 } 180 rk[10] = rk[ 4] ^ rk[ 9]; 181 rk[11] = rk[ 5] ^ rk[10]; 182 rk += 6; 183 } 184 } else if (keylen == 32) { 185 j = 60; 186 LOAD32H(rk[4], key + 16); 187 LOAD32H(rk[5], key + 20); 188 LOAD32H(rk[6], key + 24); 189 LOAD32H(rk[7], key + 28); 190 for (;;) { 191 #ifdef _MSC_VER 192 temp = skey->rijndael.eK[rk - skey->rijndael.eK + 7]; 193 #else 194 temp = rk[7]; 195 #endif 196 rk[ 8] = rk[ 0] ^ setup_mix(temp) ^ rcon[i]; 197 rk[ 9] = rk[ 1] ^ rk[ 8]; 198 rk[10] = rk[ 2] ^ rk[ 9]; 199 rk[11] = rk[ 3] ^ rk[10]; 200 if (++i == 7) { 201 break; 202 } 203 temp = rk[11]; 204 rk[12] = rk[ 4] ^ setup_mix(RORc(temp, 8)); 205 rk[13] = rk[ 5] ^ rk[12]; 206 rk[14] = rk[ 6] ^ rk[13]; 207 rk[15] = rk[ 7] ^ rk[14]; 208 rk += 8; 209 } 210 } else { 211 /* this can't happen */ 212 return CRYPT_ERROR; 213 } 214 215 #ifndef ENCRYPT_ONLY 216 /* setup the inverse key now */ 217 rk = skey->rijndael.dK; 218 rrk = skey->rijndael.eK + j - 4; 219 220 /* apply the inverse MixColumn transform to all round keys but the first and the last: */ 221 /* copy first */ 222 *rk++ = *rrk++; 223 *rk++ = *rrk++; 224 *rk++ = *rrk++; 225 *rk = *rrk; 226 rk -= 3; rrk -= 3; 227 228 for (i = 1; i < skey->rijndael.Nr; i++) { 229 rrk -= 4; 230 rk += 4; 231 #ifdef LTC_SMALL_CODE 232 temp = rrk[0]; 233 rk[0] = setup_mix2(temp); 234 temp = rrk[1]; 235 rk[1] = setup_mix2(temp); 236 temp = rrk[2]; 237 rk[2] = setup_mix2(temp); 238 temp = rrk[3]; 239 rk[3] = setup_mix2(temp); 240 #else 241 temp = rrk[0]; 242 rk[0] = 243 Tks0[byte(temp, 3)] ^ 244 Tks1[byte(temp, 2)] ^ 245 Tks2[byte(temp, 1)] ^ 246 Tks3[byte(temp, 0)]; 247 temp = rrk[1]; 248 rk[1] = 249 Tks0[byte(temp, 3)] ^ 250 Tks1[byte(temp, 2)] ^ 251 Tks2[byte(temp, 1)] ^ 252 Tks3[byte(temp, 0)]; 253 temp = rrk[2]; 254 rk[2] = 255 Tks0[byte(temp, 3)] ^ 256 Tks1[byte(temp, 2)] ^ 257 Tks2[byte(temp, 1)] ^ 258 Tks3[byte(temp, 0)]; 259 temp = rrk[3]; 260 rk[3] = 261 Tks0[byte(temp, 3)] ^ 262 Tks1[byte(temp, 2)] ^ 263 Tks2[byte(temp, 1)] ^ 264 Tks3[byte(temp, 0)]; 265 #endif 266 267 } 268 269 /* copy last */ 270 rrk -= 4; 271 rk += 4; 272 *rk++ = *rrk++; 273 *rk++ = *rrk++; 274 *rk++ = *rrk++; 275 *rk = *rrk; 276 #endif /* ENCRYPT_ONLY */ 277 278 return CRYPT_OK; 279 } 280 281 /** 282 Encrypts a block of text with AES 283 @param pt The input plaintext (16 bytes) 284 @param ct The output ciphertext (16 bytes) 285 @param skey The key as scheduled 286 @return CRYPT_OK if successful 287 */ 288 #ifdef LTC_CLEAN_STACK 289 static int _rijndael_ecb_encrypt(const unsigned char *pt, unsigned char *ct, symmetric_key *skey) 290 #else 291 int ECB_ENC(const unsigned char *pt, unsigned char *ct, symmetric_key *skey) 292 #endif 293 { 294 ulong32 s0, s1, s2, s3, t0, t1, t2, t3, *rk; 295 int Nr, r; 296 297 LTC_ARGCHK(pt != NULL); 298 LTC_ARGCHK(ct != NULL); 299 LTC_ARGCHK(skey != NULL); 300 301 Nr = skey->rijndael.Nr; 302 rk = skey->rijndael.eK; 303 304 /* 305 * map byte array block to cipher state 306 * and add initial round key: 307 */ 308 LOAD32H(s0, pt ); s0 ^= rk[0]; 309 LOAD32H(s1, pt + 4); s1 ^= rk[1]; 310 LOAD32H(s2, pt + 8); s2 ^= rk[2]; 311 LOAD32H(s3, pt + 12); s3 ^= rk[3]; 312 313 #ifdef LTC_SMALL_CODE 314 315 for (r = 0; ; r++) { 316 rk += 4; 317 t0 = 318 Te0(byte(s0, 3)) ^ 319 Te1(byte(s1, 2)) ^ 320 Te2(byte(s2, 1)) ^ 321 Te3(byte(s3, 0)) ^ 322 rk[0]; 323 t1 = 324 Te0(byte(s1, 3)) ^ 325 Te1(byte(s2, 2)) ^ 326 Te2(byte(s3, 1)) ^ 327 Te3(byte(s0, 0)) ^ 328 rk[1]; 329 t2 = 330 Te0(byte(s2, 3)) ^ 331 Te1(byte(s3, 2)) ^ 332 Te2(byte(s0, 1)) ^ 333 Te3(byte(s1, 0)) ^ 334 rk[2]; 335 t3 = 336 Te0(byte(s3, 3)) ^ 337 Te1(byte(s0, 2)) ^ 338 Te2(byte(s1, 1)) ^ 339 Te3(byte(s2, 0)) ^ 340 rk[3]; 341 if (r == Nr-2) { 342 break; 343 } 344 s0 = t0; s1 = t1; s2 = t2; s3 = t3; 345 } 346 rk += 4; 347 348 #else 349 350 /* 351 * Nr - 1 full rounds: 352 */ 353 r = Nr >> 1; 354 for (;;) { 355 t0 = 356 Te0(byte(s0, 3)) ^ 357 Te1(byte(s1, 2)) ^ 358 Te2(byte(s2, 1)) ^ 359 Te3(byte(s3, 0)) ^ 360 rk[4]; 361 t1 = 362 Te0(byte(s1, 3)) ^ 363 Te1(byte(s2, 2)) ^ 364 Te2(byte(s3, 1)) ^ 365 Te3(byte(s0, 0)) ^ 366 rk[5]; 367 t2 = 368 Te0(byte(s2, 3)) ^ 369 Te1(byte(s3, 2)) ^ 370 Te2(byte(s0, 1)) ^ 371 Te3(byte(s1, 0)) ^ 372 rk[6]; 373 t3 = 374 Te0(byte(s3, 3)) ^ 375 Te1(byte(s0, 2)) ^ 376 Te2(byte(s1, 1)) ^ 377 Te3(byte(s2, 0)) ^ 378 rk[7]; 379 380 rk += 8; 381 if (--r == 0) { 382 break; 383 } 384 385 s0 = 386 Te0(byte(t0, 3)) ^ 387 Te1(byte(t1, 2)) ^ 388 Te2(byte(t2, 1)) ^ 389 Te3(byte(t3, 0)) ^ 390 rk[0]; 391 s1 = 392 Te0(byte(t1, 3)) ^ 393 Te1(byte(t2, 2)) ^ 394 Te2(byte(t3, 1)) ^ 395 Te3(byte(t0, 0)) ^ 396 rk[1]; 397 s2 = 398 Te0(byte(t2, 3)) ^ 399 Te1(byte(t3, 2)) ^ 400 Te2(byte(t0, 1)) ^ 401 Te3(byte(t1, 0)) ^ 402 rk[2]; 403 s3 = 404 Te0(byte(t3, 3)) ^ 405 Te1(byte(t0, 2)) ^ 406 Te2(byte(t1, 1)) ^ 407 Te3(byte(t2, 0)) ^ 408 rk[3]; 409 } 410 411 #endif 412 413 /* 414 * apply last round and 415 * map cipher state to byte array block: 416 */ 417 s0 = 418 (Te4_3[byte(t0, 3)]) ^ 419 (Te4_2[byte(t1, 2)]) ^ 420 (Te4_1[byte(t2, 1)]) ^ 421 (Te4_0[byte(t3, 0)]) ^ 422 rk[0]; 423 STORE32H(s0, ct); 424 s1 = 425 (Te4_3[byte(t1, 3)]) ^ 426 (Te4_2[byte(t2, 2)]) ^ 427 (Te4_1[byte(t3, 1)]) ^ 428 (Te4_0[byte(t0, 0)]) ^ 429 rk[1]; 430 STORE32H(s1, ct+4); 431 s2 = 432 (Te4_3[byte(t2, 3)]) ^ 433 (Te4_2[byte(t3, 2)]) ^ 434 (Te4_1[byte(t0, 1)]) ^ 435 (Te4_0[byte(t1, 0)]) ^ 436 rk[2]; 437 STORE32H(s2, ct+8); 438 s3 = 439 (Te4_3[byte(t3, 3)]) ^ 440 (Te4_2[byte(t0, 2)]) ^ 441 (Te4_1[byte(t1, 1)]) ^ 442 (Te4_0[byte(t2, 0)]) ^ 443 rk[3]; 444 STORE32H(s3, ct+12); 445 446 return CRYPT_OK; 447 } 448 449 #ifdef LTC_CLEAN_STACK 450 int ECB_ENC(const unsigned char *pt, unsigned char *ct, symmetric_key *skey) 451 { 452 int err = _rijndael_ecb_encrypt(pt, ct, skey); 453 burn_stack(sizeof(unsigned long)*8 + sizeof(unsigned long*) + sizeof(int)*2); 454 return err; 455 } 456 #endif 457 458 #ifndef ENCRYPT_ONLY 459 460 /** 461 Decrypts a block of text with AES 462 @param ct The input ciphertext (16 bytes) 463 @param pt The output plaintext (16 bytes) 464 @param skey The key as scheduled 465 @return CRYPT_OK if successful 466 */ 467 #ifdef LTC_CLEAN_STACK 468 static int _rijndael_ecb_decrypt(const unsigned char *ct, unsigned char *pt, symmetric_key *skey) 469 #else 470 int ECB_DEC(const unsigned char *ct, unsigned char *pt, symmetric_key *skey) 471 #endif 472 { 473 ulong32 s0, s1, s2, s3, t0, t1, t2, t3, *rk; 474 int Nr, r; 475 476 LTC_ARGCHK(pt != NULL); 477 LTC_ARGCHK(ct != NULL); 478 LTC_ARGCHK(skey != NULL); 479 480 Nr = skey->rijndael.Nr; 481 rk = skey->rijndael.dK; 482 483 /* 484 * map byte array block to cipher state 485 * and add initial round key: 486 */ 487 LOAD32H(s0, ct ); s0 ^= rk[0]; 488 LOAD32H(s1, ct + 4); s1 ^= rk[1]; 489 LOAD32H(s2, ct + 8); s2 ^= rk[2]; 490 LOAD32H(s3, ct + 12); s3 ^= rk[3]; 491 492 #ifdef LTC_SMALL_CODE 493 for (r = 0; ; r++) { 494 rk += 4; 495 t0 = 496 Td0(byte(s0, 3)) ^ 497 Td1(byte(s3, 2)) ^ 498 Td2(byte(s2, 1)) ^ 499 Td3(byte(s1, 0)) ^ 500 rk[0]; 501 t1 = 502 Td0(byte(s1, 3)) ^ 503 Td1(byte(s0, 2)) ^ 504 Td2(byte(s3, 1)) ^ 505 Td3(byte(s2, 0)) ^ 506 rk[1]; 507 t2 = 508 Td0(byte(s2, 3)) ^ 509 Td1(byte(s1, 2)) ^ 510 Td2(byte(s0, 1)) ^ 511 Td3(byte(s3, 0)) ^ 512 rk[2]; 513 t3 = 514 Td0(byte(s3, 3)) ^ 515 Td1(byte(s2, 2)) ^ 516 Td2(byte(s1, 1)) ^ 517 Td3(byte(s0, 0)) ^ 518 rk[3]; 519 if (r == Nr-2) { 520 break; 521 } 522 s0 = t0; s1 = t1; s2 = t2; s3 = t3; 523 } 524 rk += 4; 525 526 #else 527 528 /* 529 * Nr - 1 full rounds: 530 */ 531 r = Nr >> 1; 532 for (;;) { 533 534 t0 = 535 Td0(byte(s0, 3)) ^ 536 Td1(byte(s3, 2)) ^ 537 Td2(byte(s2, 1)) ^ 538 Td3(byte(s1, 0)) ^ 539 rk[4]; 540 t1 = 541 Td0(byte(s1, 3)) ^ 542 Td1(byte(s0, 2)) ^ 543 Td2(byte(s3, 1)) ^ 544 Td3(byte(s2, 0)) ^ 545 rk[5]; 546 t2 = 547 Td0(byte(s2, 3)) ^ 548 Td1(byte(s1, 2)) ^ 549 Td2(byte(s0, 1)) ^ 550 Td3(byte(s3, 0)) ^ 551 rk[6]; 552 t3 = 553 Td0(byte(s3, 3)) ^ 554 Td1(byte(s2, 2)) ^ 555 Td2(byte(s1, 1)) ^ 556 Td3(byte(s0, 0)) ^ 557 rk[7]; 558 559 rk += 8; 560 if (--r == 0) { 561 break; 562 } 563 564 565 s0 = 566 Td0(byte(t0, 3)) ^ 567 Td1(byte(t3, 2)) ^ 568 Td2(byte(t2, 1)) ^ 569 Td3(byte(t1, 0)) ^ 570 rk[0]; 571 s1 = 572 Td0(byte(t1, 3)) ^ 573 Td1(byte(t0, 2)) ^ 574 Td2(byte(t3, 1)) ^ 575 Td3(byte(t2, 0)) ^ 576 rk[1]; 577 s2 = 578 Td0(byte(t2, 3)) ^ 579 Td1(byte(t1, 2)) ^ 580 Td2(byte(t0, 1)) ^ 581 Td3(byte(t3, 0)) ^ 582 rk[2]; 583 s3 = 584 Td0(byte(t3, 3)) ^ 585 Td1(byte(t2, 2)) ^ 586 Td2(byte(t1, 1)) ^ 587 Td3(byte(t0, 0)) ^ 588 rk[3]; 589 } 590 #endif 591 592 /* 593 * apply last round and 594 * map cipher state to byte array block: 595 */ 596 s0 = 597 (Td4[byte(t0, 3)] & 0xff000000) ^ 598 (Td4[byte(t3, 2)] & 0x00ff0000) ^ 599 (Td4[byte(t2, 1)] & 0x0000ff00) ^ 600 (Td4[byte(t1, 0)] & 0x000000ff) ^ 601 rk[0]; 602 STORE32H(s0, pt); 603 s1 = 604 (Td4[byte(t1, 3)] & 0xff000000) ^ 605 (Td4[byte(t0, 2)] & 0x00ff0000) ^ 606 (Td4[byte(t3, 1)] & 0x0000ff00) ^ 607 (Td4[byte(t2, 0)] & 0x000000ff) ^ 608 rk[1]; 609 STORE32H(s1, pt+4); 610 s2 = 611 (Td4[byte(t2, 3)] & 0xff000000) ^ 612 (Td4[byte(t1, 2)] & 0x00ff0000) ^ 613 (Td4[byte(t0, 1)] & 0x0000ff00) ^ 614 (Td4[byte(t3, 0)] & 0x000000ff) ^ 615 rk[2]; 616 STORE32H(s2, pt+8); 617 s3 = 618 (Td4[byte(t3, 3)] & 0xff000000) ^ 619 (Td4[byte(t2, 2)] & 0x00ff0000) ^ 620 (Td4[byte(t1, 1)] & 0x0000ff00) ^ 621 (Td4[byte(t0, 0)] & 0x000000ff) ^ 622 rk[3]; 623 STORE32H(s3, pt+12); 624 625 return CRYPT_OK; 626 } 627 628 629 #ifdef LTC_CLEAN_STACK 630 int ECB_DEC(const unsigned char *ct, unsigned char *pt, symmetric_key *skey) 631 { 632 int err = _rijndael_ecb_decrypt(ct, pt, skey); 633 burn_stack(sizeof(unsigned long)*8 + sizeof(unsigned long*) + sizeof(int)*2); 634 return err; 635 } 636 #endif 637 638 /** 639 Performs a self-test of the AES block cipher 640 @return CRYPT_OK if functional, CRYPT_NOP if self-test has been disabled 641 */ 642 int ECB_TEST(void) 643 { 644 #ifndef LTC_TEST 645 return CRYPT_NOP; 646 #else 647 int err; 648 static const struct { 649 int keylen; 650 unsigned char key[32], pt[16], ct[16]; 651 } tests[] = { 652 { 16, 653 { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 654 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f }, 655 { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 656 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff }, 657 { 0x69, 0xc4, 0xe0, 0xd8, 0x6a, 0x7b, 0x04, 0x30, 658 0xd8, 0xcd, 0xb7, 0x80, 0x70, 0xb4, 0xc5, 0x5a } 659 }, { 660 24, 661 { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 662 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 663 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17 }, 664 { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 665 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff }, 666 { 0xdd, 0xa9, 0x7c, 0xa4, 0x86, 0x4c, 0xdf, 0xe0, 667 0x6e, 0xaf, 0x70, 0xa0, 0xec, 0x0d, 0x71, 0x91 } 668 }, { 669 32, 670 { 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 671 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 672 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 673 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f }, 674 { 0x00, 0x11, 0x22, 0x33, 0x44, 0x55, 0x66, 0x77, 675 0x88, 0x99, 0xaa, 0xbb, 0xcc, 0xdd, 0xee, 0xff }, 676 { 0x8e, 0xa2, 0xb7, 0xca, 0x51, 0x67, 0x45, 0xbf, 677 0xea, 0xfc, 0x49, 0x90, 0x4b, 0x49, 0x60, 0x89 } 678 } 679 }; 680 681 symmetric_key key; 682 unsigned char tmp[2][16]; 683 int i, y; 684 685 for (i = 0; i < (int)(sizeof(tests)/sizeof(tests[0])); i++) { 686 zeromem(&key, sizeof(key)); 687 if ((err = rijndael_setup(tests[i].key, tests[i].keylen, 0, &key)) != CRYPT_OK) { 688 return err; 689 } 690 691 rijndael_ecb_encrypt(tests[i].pt, tmp[0], &key); 692 rijndael_ecb_decrypt(tmp[0], tmp[1], &key); 693 if (XMEMCMP(tmp[0], tests[i].ct, 16) || XMEMCMP(tmp[1], tests[i].pt, 16)) { 694 #if 0 695 printf("\n\nTest %d failed\n", i); 696 if (XMEMCMP(tmp[0], tests[i].ct, 16)) { 697 printf("CT: "); 698 for (i = 0; i < 16; i++) { 699 printf("%02x ", tmp[0][i]); 700 } 701 printf("\n"); 702 } else { 703 printf("PT: "); 704 for (i = 0; i < 16; i++) { 705 printf("%02x ", tmp[1][i]); 706 } 707 printf("\n"); 708 } 709 #endif 710 return CRYPT_FAIL_TESTVECTOR; 711 } 712 713 /* now see if we can encrypt all zero bytes 1000 times, decrypt and come back where we started */ 714 for (y = 0; y < 16; y++) tmp[0][y] = 0; 715 for (y = 0; y < 1000; y++) rijndael_ecb_encrypt(tmp[0], tmp[0], &key); 716 for (y = 0; y < 1000; y++) rijndael_ecb_decrypt(tmp[0], tmp[0], &key); 717 for (y = 0; y < 16; y++) if (tmp[0][y] != 0) return CRYPT_FAIL_TESTVECTOR; 718 } 719 return CRYPT_OK; 720 #endif 721 } 722 723 #endif /* ENCRYPT_ONLY */ 724 725 726 /** Terminate the context 727 @param skey The scheduled key 728 */ 729 void ECB_DONE(symmetric_key *skey) 730 { 731 } 732 733 734 /** 735 Gets suitable key size 736 @param keysize [in/out] The length of the recommended key (in bytes). This function will store the suitable size back in this variable. 737 @return CRYPT_OK if the input key size is acceptable. 738 */ 739 int ECB_KS(int *keysize) 740 { 741 LTC_ARGCHK(keysize != NULL); 742 743 if (*keysize < 16) 744 return CRYPT_INVALID_KEYSIZE; 745 if (*keysize < 24) { 746 *keysize = 16; 747 return CRYPT_OK; 748 } else if (*keysize < 32) { 749 *keysize = 24; 750 return CRYPT_OK; 751 } else { 752 *keysize = 32; 753 return CRYPT_OK; 754 } 755 } 756 757 #endif 758 759 760 /* $Source: /cvs/libtom/libtomcrypt/src/ciphers/aes/aes.c,v $ */ 761 /* $Revision: 1.14 $ */ 762 /* $Date: 2006/11/08 23:01:06 $ */ 763
