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KCTF2022第三题 石像病毒
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2022-5-14 11:48
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第三题 石像病毒
flag{db5c6a8dfec4d0ec5569899640}
流程
魔改AES-128-ECB加密操作
int __cdecl AES_EN_402070(char key, size_t keySize, char indata, char *outdata, int datasize)
S盒有变动
对应修改
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | static const int S[16][16] = {0x63, 0x7C, 0x77, 0x7B, 0xF2, 0x6B, 0x6F, 0xC5, 0x30, 0x01, 0x67, 0x2B, 0xFE, 0xD7, 0xAB, 0x76,0xCA, 0x82, 0xC9, 0x7D, 0xFA, 0x59, 0x47, 0xF0, 0xAD, 0xD4, 0xA2, 0xAF, 0x9C, 0xA4, 0x72, 0xC0,0xB7, 0xFD, 0x93, 0x26, 0x36, 0x3F, 0xF7, 0xCC, 0x34, 0xA5, 0xE5, 0xF1, 0x71, 0xD8, 0x31, 0x15,0x04, 0xC7, 0x23, 0xC3, 0x18, 0x96, 0x05, 0x9A, 0x07, 0x12, 0x80, 0xE2, 0xEB, 0x27, 0xB2, 0x75,0x09, 0x83, 0x2C, 0x1A, 0x1B, 0x6E, 0x5A, 0xA0, 0x52, 0x3B, 0xD6, 0xB3, 0x29, 0xE3, 0x2F, 0x84,0x53, 0xD1, 0x00, 0xED, 0x20, 0xFC, 0xB1, 0x5B, 0x6A, 0xCB, 0xBE, 0x39, 0x4A, 0x4C, 0x58, 0xCF,0xD0, 0xEF, 0xAA, 0xFB, 0x43, 0x4D, 0x33, 0x85, 0x45, 0xF9, 0x02, 0x7F, 0x50, 0x3C, 0x9F, 0xA8,0x51, 0x0A, 0x40, 0x8F, 0x92, 0x9D, 0x38, 0xF5, 0xBC, 0xB6, 0xDA, 0x21, 0x10, 0xFF, 0xF3, 0xD2,0xCD, 0x0C, 0x13, 0xEC, 0x5F, 0x97, 0x44, 0x17, 0xC4, 0xA7, 0x7E, 0x3D, 0x64, 0x5D, 0x19, 0x73,0x60, 0x81, 0x4F, 0xDC, 0x22, 0x2A, 0x90, 0x88, 0x46, 0xEE, 0xB8, 0x14, 0xDE, 0x5E, 0x0B, 0xDB,0xE0, 0x32, 0x3A, 0xA3, 0x49, 0x06, 0x24, 0x5C, 0xC2, 0xD3, 0xAC, 0x62, 0x91, 0x95, 0xE4, 0x79,0xE7, 0xC8, 0x37, 0x6D, 0x8D, 0xD5, 0x4E, 0xA9, 0x6C, 0x56, 0xF4, 0xEA, 0x65, 0x7A, 0xAE, 0x08,0xBA, 0x78, 0x25, 0x2E, 0x1C, 0xA6, 0xB4, 0xC6, 0xE8, 0xDD, 0x74, 0x1F, 0x4B, 0xBD, 0x8B, 0x8A,0x70, 0x3E, 0xB5, 0x66, 0x48, 0x03, 0xF6, 0x0E, 0x61, 0x35, 0x57, 0xB9, 0x86, 0xC1, 0x1D, 0x9E,0xE1, 0xF8, 0x98, 0x11, 0x69, 0xD9, 0x8E, 0x94, 0x9B, 0x1E, 0x87, 0xE9, 0xCE, 0x55, 0x28, 0xDF,0x8C, 0xA1, 0x89, 0x0D, 0xBF, 0xE6, 0x42, 0x68, 0x41, 0x99, 0x2D, 0x0F, 0xB0, 0x54, 0xBB, 0x16}; |
逆s盒
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | static const int S2[16][16]{ 0x52, 0x09, 0x6A, 0xD5, 0x30, 0x36, 0xA5, 0x38, 0xBF, 0x40, 0x71, 0x9E, 0x81, 0xF3, 0xD7, 0xFB, 0x7C, 0xE3, 0x39, 0x82, 0x9B, 0x2F, 0xFF, 0x87, 0x34, 0x8E, 0x43, 0x44, 0xC4, 0xDE, 0xE9, 0xCB, 0x54, 0x7B, 0x94, 0x32, 0xA6, 0xC2, 0x23, 0x3D, 0xEE, 0x4C, 0x95, 0x0B, 0x42, 0xFA, 0xC3, 0x4E, 0x08, 0x2E, 0xA1, 0x66, 0x28, 0xD9, 0x24, 0xB2, 0x76, 0x5B, 0xA2, 0x49, 0x6D, 0x8B, 0xD1, 0x25, 0x72, 0xF8, 0xF6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xD4, 0xA4, 0x5C, 0xCC, 0x5D, 0x65, 0xB6, 0x92, 0x6C, 0x70, 0x48, 0x50, 0xFD, 0xED, 0xB9, 0xDA, 0x5E, 0x15, 0x46, 0x57, 0xA7, 0x8D, 0x9D, 0x84, 0x90, 0xD8, 0xAB, 0x00, 0x8C, 0xBC, 0xD3, 0x0A, 0xF7, 0xE4, 0x58, 0x05, 0xB8, 0xB3, 0x45, 0x06, 0xD0, 0x2C, 0x1E, 0x8F, 0xCA, 0x3F, 0x0F, 0x02, 0xC1, 0xAF, 0xBD, 0x03, 0x01, 0x13, 0x8A, 0x6B, 0x3A, 0x91, 0x11, 0x41, 0x4F, 0x67, 0xDC, 0xEA, 0x97, 0xF2, 0xCF, 0xCE, 0xF0, 0xB4, 0xE6, 0x73, 0x96, 0xAC, 0x74, 0x22, 0xE7, 0xAD, 0x35, 0x85, 0xE2, 0xF9, 0x37, 0xE8, 0x1C, 0x75, 0xDF, 0x6E, 0x47, 0xF1, 0x1A, 0xA3, 0x1D, 0x29, 0xC5, 0x89, 0x6F, 0xB7, 0x62, 0x0E, 0xAA, 0x18, 0xBE, 0x1B, 0xFC, 0x56, 0x3E, 0x4B, 0xC6, 0xD2, 0x79, 0x20, 0x9A, 0xDB, 0xC0, 0xFE, 0x78, 0xCD, 0x5A, 0xF4, 0x1F, 0xDD, 0xA8, 0x33, 0x88, 0x07, 0xC7, 0x31, 0xB1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xEC, 0x5F, 0x60, 0x51, 0x7F, 0xA9, 0x19, 0xB5, 0x4A, 0x0D, 0x2D, 0xE5, 0x7A, 0x9F, 0x93, 0xC9, 0x9C, 0xEF, 0xA0, 0xE0, 0x3B, 0x4D, 0xAE, 0x2A, 0xF5, 0xB0, 0xC8, 0xEB, 0xBB, 0x3C, 0x83, 0x53, 0x99, 0x61, 0x17, 0x2B, 0x04, 0x7E, 0xBA, 0x77, 0xD6, 0x26, 0xE1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0C, 0x7D,}; |
m_shiftRows函数，
对应修改shiftRows操作
AES加解密源码参考
https://blog.csdn.net/qq_28205153/article/details/55798628
aes.h
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 | #pragma once#ifndef MY_AES_H#define MY_AES_H/** * 参数 p: 明文的字符串数组。 * 参数 plen: 明文的长度,长度必须为16的倍数。 * 参数 key: 密钥的字符串数组。 */void aes(char* p, int plen, char* key);/** * 参数 c: 密文的字符串数组。 * 参数 clen: 密文的长度,长度必须为16的倍数。 * 参数 key: 密钥的字符串数组。 */void deAes(char* c, int clen, char* key);void AES_EN_402070(char* key, size_t keylen, char* p, char* outdata, int plen);void AES_DE_402070(char* key, size_t keylen, char* c, char* outdata, int clen);#endif |
aes.cpp
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 | #include <stdio.h>#include <stdlib.h>#include <string.h>#include "aes.h"/** * S盒 *///static const int S[16][16] = { 0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76,// 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0,// 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15,// 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75,// 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84,// 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf,// 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8,// 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2,// 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73,// 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb,// 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79,// 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08,// 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a,// 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e,// 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf,// 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16 };static const int S[16][16] = {0x63, 0x7C, 0x77, 0x7B, 0xF2, 0x6B, 0x6F, 0xC5, 0x30, 0x01, 0x67, 0x2B, 0xFE, 0xD7, 0xAB, 0x76,0xCA, 0x82, 0xC9, 0x7D, 0xFA, 0x59, 0x47, 0xF0, 0xAD, 0xD4, 0xA2, 0xAF, 0x9C, 0xA4, 0x72, 0xC0,0xB7, 0xFD, 0x93, 0x26, 0x36, 0x3F, 0xF7, 0xCC, 0x34, 0xA5, 0xE5, 0xF1, 0x71, 0xD8, 0x31, 0x15,0x04, 0xC7, 0x23, 0xC3, 0x18, 0x96, 0x05, 0x9A, 0x07, 0x12, 0x80, 0xE2, 0xEB, 0x27, 0xB2, 0x75,0x09, 0x83, 0x2C, 0x1A, 0x1B, 0x6E, 0x5A, 0xA0, 0x52, 0x3B, 0xD6, 0xB3, 0x29, 0xE3, 0x2F, 0x84,0x53, 0xD1, 0x00, 0xED, 0x20, 0xFC, 0xB1, 0x5B, 0x6A, 0xCB, 0xBE, 0x39, 0x4A, 0x4C, 0x58, 0xCF,0xD0, 0xEF, 0xAA, 0xFB, 0x43, 0x4D, 0x33, 0x85, 0x45, 0xF9, 0x02, 0x7F, 0x50, 0x3C, 0x9F, 0xA8,0x51, 0x0A, 0x40, 0x8F, 0x92, 0x9D, 0x38, 0xF5, 0xBC, 0xB6, 0xDA, 0x21, 0x10, 0xFF, 0xF3, 0xD2,0xCD, 0x0C, 0x13, 0xEC, 0x5F, 0x97, 0x44, 0x17, 0xC4, 0xA7, 0x7E, 0x3D, 0x64, 0x5D, 0x19, 0x73,0x60, 0x81, 0x4F, 0xDC, 0x22, 0x2A, 0x90, 0x88, 0x46, 0xEE, 0xB8, 0x14, 0xDE, 0x5E, 0x0B, 0xDB,0xE0, 0x32, 0x3A, 0xA3, 0x49, 0x06, 0x24, 0x5C, 0xC2, 0xD3, 0xAC, 0x62, 0x91, 0x95, 0xE4, 0x79,0xE7, 0xC8, 0x37, 0x6D, 0x8D, 0xD5, 0x4E, 0xA9, 0x6C, 0x56, 0xF4, 0xEA, 0x65, 0x7A, 0xAE, 0x08,0xBA, 0x78, 0x25, 0x2E, 0x1C, 0xA6, 0xB4, 0xC6, 0xE8, 0xDD, 0x74, 0x1F, 0x4B, 0xBD, 0x8B, 0x8A,0x70, 0x3E, 0xB5, 0x66, 0x48, 0x03, 0xF6, 0x0E, 0x61, 0x35, 0x57, 0xB9, 0x86, 0xC1, 0x1D, 0x9E,0xE1, 0xF8, 0x98, 0x11, 0x69, 0xD9, 0x8E, 0x94, 0x9B, 0x1E, 0x87, 0xE9, 0xCE, 0x55, 0x28, 0xDF,0x8C, 0xA1, 0x89, 0x0D, 0xBF, 0xE6, 0x42, 0x68, 0x41, 0x99, 0x2D, 0x0F, 0xB0, 0x54, 0xBB, 0x16};/** * 逆S盒 *///static const int S2[16][16] = { 0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb,// 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb,// 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e,// 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25,// 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92,// 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84,// 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06,// 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b,// 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73,// 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e,// 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b,// 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4,// 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f,// 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef,// 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61,// 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d };static const int S2[16][16]{ 0x52, 0x09, 0x6A, 0xD5, 0x30, 0x36, 0xA5, 0x38, 0xBF, 0x40, 0x71, 0x9E, 0x81, 0xF3, 0xD7, 0xFB, 0x7C, 0xE3, 0x39, 0x82, 0x9B, 0x2F, 0xFF, 0x87, 0x34, 0x8E, 0x43, 0x44, 0xC4, 0xDE, 0xE9, 0xCB, 0x54, 0x7B, 0x94, 0x32, 0xA6, 0xC2, 0x23, 0x3D, 0xEE, 0x4C, 0x95, 0x0B, 0x42, 0xFA, 0xC3, 0x4E, 0x08, 0x2E, 0xA1, 0x66, 0x28, 0xD9, 0x24, 0xB2, 0x76, 0x5B, 0xA2, 0x49, 0x6D, 0x8B, 0xD1, 0x25, 0x72, 0xF8, 0xF6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xD4, 0xA4, 0x5C, 0xCC, 0x5D, 0x65, 0xB6, 0x92, 0x6C, 0x70, 0x48, 0x50, 0xFD, 0xED, 0xB9, 0xDA, 0x5E, 0x15, 0x46, 0x57, 0xA7, 0x8D, 0x9D, 0x84, 0x90, 0xD8, 0xAB, 0x00, 0x8C, 0xBC, 0xD3, 0x0A, 0xF7, 0xE4, 0x58, 0x05, 0xB8, 0xB3, 0x45, 0x06, 0xD0, 0x2C, 0x1E, 0x8F, 0xCA, 0x3F, 0x0F, 0x02, 0xC1, 0xAF, 0xBD, 0x03, 0x01, 0x13, 0x8A, 0x6B, 0x3A, 0x91, 0x11, 0x41, 0x4F, 0x67, 0xDC, 0xEA, 0x97, 0xF2, 0xCF, 0xCE, 0xF0, 0xB4, 0xE6, 0x73, 0x96, 0xAC, 0x74, 0x22, 0xE7, 0xAD, 0x35, 0x85, 0xE2, 0xF9, 0x37, 0xE8, 0x1C, 0x75, 0xDF, 0x6E, 0x47, 0xF1, 0x1A, 0xA3, 0x1D, 0x29, 0xC5, 0x89, 0x6F, 0xB7, 0x62, 0x0E, 0xAA, 0x18, 0xBE, 0x1B, 0xFC, 0x56, 0x3E, 0x4B, 0xC6, 0xD2, 0x79, 0x20, 0x9A, 0xDB, 0xC0, 0xFE, 0x78, 0xCD, 0x5A, 0xF4, 0x1F, 0xDD, 0xA8, 0x33, 0x88, 0x07, 0xC7, 0x31, 0xB1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xEC, 0x5F, 0x60, 0x51, 0x7F, 0xA9, 0x19, 0xB5, 0x4A, 0x0D, 0x2D, 0xE5, 0x7A, 0x9F, 0x93, 0xC9, 0x9C, 0xEF, 0xA0, 0xE0, 0x3B, 0x4D, 0xAE, 0x2A, 0xF5, 0xB0, 0xC8, 0xEB, 0xBB, 0x3C, 0x83, 0x53, 0x99, 0x61, 0x17, 0x2B, 0x04, 0x7E, 0xBA, 0x77, 0xD6, 0x26, 0xE1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0C, 0x7D,};/** * 获取整形数据的低8位的左4个位 */static int getLeft4Bit(int num) { int left = num & 0x000000f0; return left >> 4;}/** * 获取整形数据的低8位的右4个位 */static int getRight4Bit(int num) { return num & 0x0000000f;}/** * 根据索引，从S盒中获得元素 */static int getNumFromSBox(int index) { int row = getLeft4Bit(index); int col = getRight4Bit(index); return S[row][col];}/** * 把一个字符转变成整型 */static int getIntFromChar(char c) { int result = (int)c; return result & 0x000000ff;}/** * 把16个字符转变成4X4的数组， * 该矩阵中字节的排列顺序为从上到下， * 从左到右依次排列。 */static void convertToIntArray(char* str, int pa[4][4]) { int k = 0; int i, j; for (i = 0; i < 4; i++) for (j = 0; j < 4; j++) { pa[j][i] = getIntFromChar(str[k]); k++; }}/** * 打印4X4的数组 */static void printArray(int a[4][4]) { int i, j; for (i = 0; i < 4; i++) { for (j = 0; j < 4; j++) printf("a[%d][%d] = 0x%x ", i, j, a[i][j]); printf("\n"); } printf("\n");}/** * 打印字符串的ASSCI， * 以十六进制显示。 */static void printASSCI(char* str, int len) { int i; for (i = 0; i < len; i++) printf("0x%x ", getIntFromChar(str[i])); printf("\n");}/** * 把连续的4个字符合并成一个4字节的整型 */static int getWordFromStr(char* str) { int one, two, three, four; one = getIntFromChar(str[0]); one = one << 24; two = getIntFromChar(str[1]); two = two << 16; three = getIntFromChar(str[2]); three = three << 8; four = getIntFromChar(str[3]); return one | two | three | four;}/** * 把一个4字节的数的第一、二、三、四个字节取出， * 入进一个4个元素的整型数组里面。 */static void splitIntToArray(int num, int array[4]) { int one, two, three; one = num >> 24; array[0] = one & 0x000000ff; two = num >> 16; array[1] = two & 0x000000ff; three = num >> 8; array[2] = three & 0x000000ff; array[3] = num & 0x000000ff;}/** * 将数组中的元素循环左移step位 */static void leftLoop4int(int array[4], int step) { int temp[4]; int i; int index; for (i = 0; i < 4; i++) temp[i] = array[i]; index = step % 4 == 0 ? 0 : step % 4; for (i = 0; i < 4; i++) { array[i] = temp[index]; index++; index = index % 4; }}/** * 把数组中的第一、二、三和四元素分别作为 * 4字节整型的第一、二、三和四字节，合并成一个4字节整型 */static int mergeArrayToInt(int array[4]) { int one = array[0] << 24; int two = array[1] << 16; int three = array[2] << 8; int four = array[3]; return one | two | three | four;}/** * 常量轮值表 */static const int Rcon[10] = { 0x01000000, 0x02000000, 0x04000000, 0x08000000, 0x10000000, 0x20000000, 0x40000000, 0x80000000, 0x1b000000, 0x36000000 };/** * 密钥扩展中的T函数 */static int T(int num, int round) { int numArray[4]; int i; int result; splitIntToArray(num, numArray); leftLoop4int(numArray, 1);//字循环 //字节代换 for (i = 0; i < 4; i++) numArray[i] = getNumFromSBox(numArray[i]); result = mergeArrayToInt(numArray); return result ^ Rcon[round];}//密钥对应的扩展数组static int w[44];/** * 打印W数组 */static void printW() { int i, j; for (i = 0, j = 1; i < 44; i++, j++) { printf("w[%d] = 0x%x ", i, w[i]); if (j % 4 == 0) printf("\n"); } printf("\n");}/** * 扩展密钥，结果是把w[44]中的每个元素初始化 */static void extendKey(char* key) { int i, j; for (i = 0; i < 4; i++) w[i] = getWordFromStr(key + i * 4); for (i = 4, j = 0; i < 44; i++) { if (i % 4 == 0) { w[i] = w[i - 4] ^ T(w[i - 1], j); j++;//下一轮 } else { w[i] = w[i - 4] ^ w[i - 1]; } }}/** * 轮密钥加 */static void addRoundKey(int array[4][4], int round) { int warray[4]; int i, j; for (i = 0; i < 4; i++) { splitIntToArray(w[round * 4 + i], warray); for (j = 0; j < 4; j++) { array[j][i] = array[j][i] ^ warray[j]; } }}/** * 字节代换 */static void subBytes(int array[4][4]) { int i, j; for (i = 0; i < 4; i++) for (j = 0; j < 4; j++) array[i][j] = getNumFromSBox(array[i][j]);}/** * 行移位 */static void shiftRows(int array[4][4]) { int rowTwo[4], rowThree[4], rowFour[4]; int i; for (i = 0; i < 4; i++) { rowTwo[i] = array[1][i]; rowThree[i] = array[2][i]; rowFour[i] = array[3][i]; }/* leftLoop4int(rowTwo, 1); leftLoop4int(rowThree, 2); leftLoop4int(rowFour, 3);*/ leftLoop4int(rowTwo, 3); leftLoop4int(rowThree, 2); leftLoop4int(rowFour, 1); for (i = 0; i < 4; i++) { array[1][i] = rowTwo[i]; array[2][i] = rowThree[i]; array[3][i] = rowFour[i]; }}/** * 列混合要用到的矩阵 */static const int colM[4][4] = { 2, 3, 1, 1, 1, 2, 3, 1, 1, 1, 2, 3, 3, 1, 1, 2 };static int GFMul2(int s) { int result = s << 1; int a7 = result & 0x00000100; if (a7 != 0) { result = result & 0x000000ff; result = result ^ 0x1b; } return result;}static int GFMul3(int s) { return GFMul2(s) ^ s;}static int GFMul4(int s) { return GFMul2(GFMul2(s));}static int GFMul8(int s) { return GFMul2(GFMul4(s));}static int GFMul9(int s) { return GFMul8(s) ^ s;}static int GFMul11(int s) { return GFMul9(s) ^ GFMul2(s);}static int GFMul12(int s) { return GFMul8(s) ^ GFMul4(s);}static int GFMul13(int s) { return GFMul12(s) ^ s;}static int GFMul14(int s) { return GFMul12(s) ^ GFMul2(s);}/** * GF上的二元运算 */static int GFMul(int n, int s) { int result; if (n == 1) result = s; else if (n == 2) result = GFMul2(s); else if (n == 3) result = GFMul3(s); else if (n == 0x9) result = GFMul9(s); else if (n == 0xb)//11 result = GFMul11(s); else if (n == 0xd)//13 result = GFMul13(s); else if (n == 0xe)//14 result = GFMul14(s); return result;}/** * 列混合 */static void mixColumns(int array[4][4]) { int tempArray[4][4]; int i, j; for (i = 0; i < 4; i++) for (j = 0; j < 4; j++) tempArray[i][j] = array[i][j]; for (i = 0; i < 4; i++) for (j = 0; j < 4; j++) { array[i][j] = GFMul(colM[i][0], tempArray[0][j]) ^ GFMul(colM[i][1], tempArray[1][j]) ^ GFMul(colM[i][2], tempArray[2][j]) ^ GFMul(colM[i][3], tempArray[3][j]); }}/** * 把4X4数组转回字符串 */static void convertArrayToStr(int array[4][4], char* str) { int i, j; for (i = 0; i < 4; i++) for (j = 0; j < 4; j++) *str++ = (char)array[j][i];}/** * 检查密钥长度 */static int checkKeyLen(int len) { if (len == 16) return 1; else return 0;}void AES_EN_402070(char* key, size_t keylen, char* p, char* outdata, int plen) { //int keylen = strlen(key); int pArray[4][4]; int k, i; if (plen == 0 || plen % 16 != 0) { printf("明文字符长度必须为16的倍数！\n"); exit(0); } if (!checkKeyLen(keylen)) { printf("密钥字符长度错误！长度必须为16。当前长度为%d\n", keylen); exit(0); } extendKey(key);//扩展密钥 for (k = 0; k < plen; k += 16) { convertToIntArray(p + k, pArray); addRoundKey(pArray, 0);//一开始的轮密钥加 for (i = 1; i < 10; i++) { subBytes(pArray);//字节代换 shiftRows(pArray);//行移位 mixColumns(pArray);//列混合 addRoundKey(pArray, i); } subBytes(pArray);//字节代换 shiftRows(pArray);//行移位 addRoundKey(pArray, 10); convertArrayToStr(pArray, outdata + k); }}/** * 参数 p: 明文的字符串数组。 * 参数 plen: 明文的长度。 * 参数 key: 密钥的字符串数组。 */void aes(char* p, int plen, char* key) { int keylen = strlen(key); int pArray[4][4]; int k, i; if (plen == 0 || plen % 16 != 0) { printf("明文字符长度必须为16的倍数！\n"); exit(0); } if (!checkKeyLen(keylen)) { printf("密钥字符长度错误！长度必须为16。当前长度为%d\n", keylen); exit(0); } extendKey(key);//扩展密钥 for (k = 0; k < plen; k += 16) { convertToIntArray(p + k, pArray); addRoundKey(pArray, 0);//一开始的轮密钥加 for (i = 1; i < 10; i++) { subBytes(pArray);//字节代换 shiftRows(pArray);//行移位 mixColumns(pArray);//列混合 addRoundKey(pArray, i); } subBytes(pArray);//字节代换 shiftRows(pArray);//行移位 addRoundKey(pArray, 10); convertArrayToStr(pArray, p + k); }}/** * 根据索引从逆S盒中获取值 */static int getNumFromS1Box(int index) { int row = getLeft4Bit(index); int col = getRight4Bit(index); return S2[row][col];}/** * 逆字节变换 */static void deSubBytes(int array[4][4]) { int i, j; for (i = 0; i < 4; i++) for (j = 0; j < 4; j++) array[i][j] = getNumFromS1Box(array[i][j]);}/** * 把4个元素的数组循环右移step位 */static void rightLoop4int(int array[4], int step) { int temp[4]; int i; int index; for (i = 0; i < 4; i++) temp[i] = array[i]; index = step % 4 == 0 ? 0 : step % 4; index = 3 - index; for (i = 3; i >= 0; i--) { array[i] = temp[index]; index--; index = index == -1 ? 3 : index; }}/** * 逆行移位 */static void deShiftRows(int array[4][4]) { int rowTwo[4], rowThree[4], rowFour[4]; int i; for (i = 0; i < 4; i++) { rowTwo[i] = array[1][i]; rowThree[i] = array[2][i]; rowFour[i] = array[3][i]; } /* rightLoop4int(rowTwo, 1); rightLoop4int(rowThree, 2); rightLoop4int(rowFour, 3); */ rightLoop4int(rowTwo, 3); rightLoop4int(rowThree, 2); rightLoop4int(rowFour, 1); for (i = 0; i < 4; i++) { array[1][i] = rowTwo[i]; array[2][i] = rowThree[i]; array[3][i] = rowFour[i]; }}/** * 逆列混合用到的矩阵 */static const int deColM[4][4] = { 0xe, 0xb, 0xd, 0x9, 0x9, 0xe, 0xb, 0xd, 0xd, 0x9, 0xe, 0xb, 0xb, 0xd, 0x9, 0xe };/** * 逆列混合 */static void deMixColumns(int array[4][4]) { int tempArray[4][4]; int i, j; for (i = 0; i < 4; i++) for (j = 0; j < 4; j++) tempArray[i][j] = array[i][j]; for (i = 0; i < 4; i++) for (j = 0; j < 4; j++) { array[i][j] = GFMul(deColM[i][0], tempArray[0][j]) ^ GFMul(deColM[i][1], tempArray[1][j]) ^ GFMul(deColM[i][2], tempArray[2][j]) ^ GFMul(deColM[i][3], tempArray[3][j]); }}/** * 把两个4X4数组进行异或 */static void addRoundTowArray(int aArray[4][4], int bArray[4][4]) { int i, j; for (i = 0; i < 4; i++) for (j = 0; j < 4; j++) aArray[i][j] = aArray[i][j] ^ bArray[i][j];}/** * 从4个32位的密钥字中获得4X4数组， * 用于进行逆列混合 */static void getArrayFrom4W(int i, int array[4][4]) { int index, j; int colOne[4], colTwo[4], colThree[4], colFour[4]; index = i * 4; splitIntToArray(w[index], colOne); splitIntToArray(w[index + 1], colTwo); splitIntToArray(w[index + 2], colThree); splitIntToArray(w[index + 3], colFour); for (j = 0; j < 4; j++) { array[j][0] = colOne[j]; array[j][1] = colTwo[j]; array[j][2] = colThree[j]; array[j][3] = colFour[j]; }}void AES_DE_402070(char* key, size_t keylen, char* c, char* outdata, int clen) { //(char* c, int clen, char* key) //(char* p, int plen, char* key) int cArray[4][4]; int k; // int keylen, k; //keylen = strlen(key); if (clen == 0 || clen % 16 != 0) { printf("密文字符长度必须为16的倍数！现在的长度为%d\n", clen); exit(0); } if (!checkKeyLen(keylen)) { printf("密钥字符长度错误！长度必须为16、24和32。当前长度为%d\n", keylen); exit(0); } extendKey(key);//扩展密钥 for (k = 0; k < clen; k += 16) { int i; int wArray[4][4]; convertToIntArray(c + k, cArray); addRoundKey(cArray, 10); for (i = 9; i >= 1; i--) { deSubBytes(cArray); deShiftRows(cArray); deMixColumns(cArray); getArrayFrom4W(i, wArray); deMixColumns(wArray); addRoundTowArray(cArray, wArray); } deSubBytes(cArray); deShiftRows(cArray); addRoundKey(cArray, 0); convertArrayToStr(cArray, outdata + k); }}/** * 参数 c: 密文的字符串数组。 * 参数 clen: 密文的长度。 * 参数 key: 密钥的字符串数组。 */void deAes(char* c, int clen, char* key) { int cArray[4][4]; int keylen, k; keylen = strlen(key); if (clen == 0 || clen % 16 != 0) { printf("密文字符长度必须为16的倍数！现在的长度为%d\n", clen); exit(0); } if (!checkKeyLen(keylen)) { printf("密钥字符长度错误！长度必须为16、24和32。当前长度为%d\n", keylen); exit(0); } extendKey(key);//扩展密钥 for (k = 0; k < clen; k += 16) { int i; int wArray[4][4]; convertToIntArray(c + k, cArray); addRoundKey(cArray, 10); for (i = 9; i >= 1; i--) { deSubBytes(cArray); deShiftRows(cArray); deMixColumns(cArray); getArrayFrom4W(i, wArray); deMixColumns(wArray); addRoundTowArray(cArray, wArray); } deSubBytes(cArray); deShiftRows(cArray); addRoundKey(cArray, 0); convertArrayToStr(cArray, c + k); }} |
test
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 | #include <iostream>#include "aes.h"int main(){ char target[] = { 0x57, 0x7C, 0xF5, 0x6D, 0x56, 0x96, 0x77, 0x45, 0xB0, 0xBD, 0xA1, 0xC7, 0x89, 0xA5, 0xAB, 0xDC,0xF4, 0xF2, 0x4B, 0xFE, 0xBE, 0xF5, 0xF5, 0x5C, 0x4D, 0x30, 0x42, 0x0F, 0x2B, 0x3B, 0xE6, 0xCB }; char key[] = {0x2F, 0x65, 0xB1, 0xFF, 0x31, 0xED, 0x86, 0xD0, 0x9A, 0x28, 0x5C, 0x0F, 0x40, 0x48, 0x05, 0x9D }; char flag[33] = { 0 }; AES_DE_402070(key, 16, target, flag, 32); for (int i = 0; i < 32; ++i) { printf("%02x ", (unsigned char)flag[i]); if (!((i + 1) % 16)) { printf("\n"); } } printf("\n"); printf("%s\n", flag); return 0;} |
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