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  1. /*
  2.  * DES encryption/decryption
  3.  * Copyright (c) 2007 Reimar Doeffinger
  4.  *
  5.  * This file is part of FFmpeg.
  6.  *
  7.  * FFmpeg is free software; you can redistribute it and/or
  8.  * modify it under the terms of the GNU Lesser General Public
  9.  * License as published by the Free Software Foundation; either
  10.  * version 2.1 of the License, or (at your option) any later version.
  11.  *
  12.  * FFmpeg is distributed in the hope that it will be useful,
  13.  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15.  * Lesser General Public License for more details.
  16.  *
  17.  * You should have received a copy of the GNU Lesser General Public
  18.  * License along with FFmpeg; if not, write to the Free Software
  19.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  20.  */
  21. #include <inttypes.h>
  22. #include "avutil.h"
  23. #include "common.h"
  24. #include "intreadwrite.h"
  25. #include "des.h"
  26.  
  27. typedef struct AVDES AVDES;
  28.  
  29. #define T(a, b, c, d, e, f, g, h) 64-a,64-b,64-c,64-d,64-e,64-f,64-g,64-h
  30. static const uint8_t IP_shuffle[] = {
  31.     T(58, 50, 42, 34, 26, 18, 10, 2),
  32.     T(60, 52, 44, 36, 28, 20, 12, 4),
  33.     T(62, 54, 46, 38, 30, 22, 14, 6),
  34.     T(64, 56, 48, 40, 32, 24, 16, 8),
  35.     T(57, 49, 41, 33, 25, 17,  9, 1),
  36.     T(59, 51, 43, 35, 27, 19, 11, 3),
  37.     T(61, 53, 45, 37, 29, 21, 13, 5),
  38.     T(63, 55, 47, 39, 31, 23, 15, 7)
  39. };
  40. #undef T
  41.  
  42. #if CONFIG_SMALL || defined(GENTABLES)
  43. #define T(a, b, c, d) 32-a,32-b,32-c,32-d
  44. static const uint8_t P_shuffle[] = {
  45.     T(16,  7, 20, 21),
  46.     T(29, 12, 28, 17),
  47.     T( 1, 15, 23, 26),
  48.     T( 5, 18, 31, 10),
  49.     T( 2,  8, 24, 14),
  50.     T(32, 27,  3,  9),
  51.     T(19, 13, 30,  6),
  52.     T(22, 11,  4, 25)
  53. };
  54. #undef T
  55. #endif
  56.  
  57. #define T(a, b, c, d, e, f, g) 64-a,64-b,64-c,64-d,64-e,64-f,64-g
  58. static const uint8_t PC1_shuffle[] = {
  59.     T(57, 49, 41, 33, 25, 17,  9),
  60.     T( 1, 58, 50, 42, 34, 26, 18),
  61.     T(10,  2, 59, 51, 43, 35, 27),
  62.     T(19, 11,  3, 60, 52, 44, 36),
  63.     T(63, 55, 47, 39, 31, 23, 15),
  64.     T( 7, 62, 54, 46, 38, 30, 22),
  65.     T(14,  6, 61, 53, 45, 37, 29),
  66.     T(21, 13,  5, 28, 20, 12,  4)
  67. };
  68. #undef T
  69.  
  70. #define T(a, b, c, d, e, f) 56-a,56-b,56-c,56-d,56-e,56-f
  71. static const uint8_t PC2_shuffle[] = {
  72.     T(14, 17, 11, 24,  1,  5),
  73.     T( 3, 28, 15,  6, 21, 10),
  74.     T(23, 19, 12,  4, 26,  8),
  75.     T(16,  7, 27, 20, 13,  2),
  76.     T(41, 52, 31, 37, 47, 55),
  77.     T(30, 40, 51, 45, 33, 48),
  78.     T(44, 49, 39, 56, 34, 53),
  79.     T(46, 42, 50, 36, 29, 32)
  80. };
  81. #undef T
  82.  
  83. #if CONFIG_SMALL
  84. static const uint8_t S_boxes[8][32] = {
  85.     {
  86.     0x0e, 0xf4, 0x7d, 0x41, 0xe2, 0x2f, 0xdb, 0x18, 0xa3, 0x6a, 0xc6, 0xbc, 0x95, 0x59, 0x30, 0x87,
  87.     0xf4, 0xc1, 0x8e, 0x28, 0x4d, 0x96, 0x12, 0x7b, 0x5f, 0xbc, 0x39, 0xe7, 0xa3, 0x0a, 0x65, 0xd0,
  88.     }, {
  89.     0x3f, 0xd1, 0x48, 0x7e, 0xf6, 0x2b, 0x83, 0xe4, 0xc9, 0x07, 0x12, 0xad, 0x6c, 0x90, 0xb5, 0x5a,
  90.     0xd0, 0x8e, 0xa7, 0x1b, 0x3a, 0xf4, 0x4d, 0x21, 0xb5, 0x68, 0x7c, 0xc6, 0x09, 0x53, 0xe2, 0x9f,
  91.     }, {
  92.     0xda, 0x70, 0x09, 0x9e, 0x36, 0x43, 0x6f, 0xa5, 0x21, 0x8d, 0x5c, 0xe7, 0xcb, 0xb4, 0xf2, 0x18,
  93.     0x1d, 0xa6, 0xd4, 0x09, 0x68, 0x9f, 0x83, 0x70, 0x4b, 0xf1, 0xe2, 0x3c, 0xb5, 0x5a, 0x2e, 0xc7,
  94.     }, {
  95.     0xd7, 0x8d, 0xbe, 0x53, 0x60, 0xf6, 0x09, 0x3a, 0x41, 0x72, 0x28, 0xc5, 0x1b, 0xac, 0xe4, 0x9f,
  96.     0x3a, 0xf6, 0x09, 0x60, 0xac, 0x1b, 0xd7, 0x8d, 0x9f, 0x41, 0x53, 0xbe, 0xc5, 0x72, 0x28, 0xe4,
  97.     }, {
  98.     0xe2, 0xbc, 0x24, 0xc1, 0x47, 0x7a, 0xdb, 0x16, 0x58, 0x05, 0xf3, 0xaf, 0x3d, 0x90, 0x8e, 0x69,
  99.     0xb4, 0x82, 0xc1, 0x7b, 0x1a, 0xed, 0x27, 0xd8, 0x6f, 0xf9, 0x0c, 0x95, 0xa6, 0x43, 0x50, 0x3e,
  100.     }, {
  101.     0xac, 0xf1, 0x4a, 0x2f, 0x79, 0xc2, 0x96, 0x58, 0x60, 0x1d, 0xd3, 0xe4, 0x0e, 0xb7, 0x35, 0x8b,
  102.     0x49, 0x3e, 0x2f, 0xc5, 0x92, 0x58, 0xfc, 0xa3, 0xb7, 0xe0, 0x14, 0x7a, 0x61, 0x0d, 0x8b, 0xd6,
  103.     }, {
  104.     0xd4, 0x0b, 0xb2, 0x7e, 0x4f, 0x90, 0x18, 0xad, 0xe3, 0x3c, 0x59, 0xc7, 0x25, 0xfa, 0x86, 0x61,
  105.     0x61, 0xb4, 0xdb, 0x8d, 0x1c, 0x43, 0xa7, 0x7e, 0x9a, 0x5f, 0x06, 0xf8, 0xe0, 0x25, 0x39, 0xc2,
  106.     }, {
  107.     0x1d, 0xf2, 0xd8, 0x84, 0xa6, 0x3f, 0x7b, 0x41, 0xca, 0x59, 0x63, 0xbe, 0x05, 0xe0, 0x9c, 0x27,
  108.     0x27, 0x1b, 0xe4, 0x71, 0x49, 0xac, 0x8e, 0xd2, 0xf0, 0xc6, 0x9a, 0x0d, 0x3f, 0x53, 0x65, 0xb8,
  109.     }
  110. };
  111. #else
  112. /**
  113.  * This table contains the results of applying both the S-box and P-shuffle.
  114.  * It can be regenerated by compiling this file with -DCONFIG_SMALL -DTEST -DGENTABLES
  115.  */
  116. static const uint32_t S_boxes_P_shuffle[8][64] = {
  117.     {
  118.     0x00808200, 0x00000000, 0x00008000, 0x00808202, 0x00808002, 0x00008202, 0x00000002, 0x00008000,
  119.     0x00000200, 0x00808200, 0x00808202, 0x00000200, 0x00800202, 0x00808002, 0x00800000, 0x00000002,
  120.     0x00000202, 0x00800200, 0x00800200, 0x00008200, 0x00008200, 0x00808000, 0x00808000, 0x00800202,
  121.     0x00008002, 0x00800002, 0x00800002, 0x00008002, 0x00000000, 0x00000202, 0x00008202, 0x00800000,
  122.     0x00008000, 0x00808202, 0x00000002, 0x00808000, 0x00808200, 0x00800000, 0x00800000, 0x00000200,
  123.     0x00808002, 0x00008000, 0x00008200, 0x00800002, 0x00000200, 0x00000002, 0x00800202, 0x00008202,
  124.     0x00808202, 0x00008002, 0x00808000, 0x00800202, 0x00800002, 0x00000202, 0x00008202, 0x00808200,
  125.     0x00000202, 0x00800200, 0x00800200, 0x00000000, 0x00008002, 0x00008200, 0x00000000, 0x00808002,
  126.     },
  127.     {
  128.     0x40084010, 0x40004000, 0x00004000, 0x00084010, 0x00080000, 0x00000010, 0x40080010, 0x40004010,
  129.     0x40000010, 0x40084010, 0x40084000, 0x40000000, 0x40004000, 0x00080000, 0x00000010, 0x40080010,
  130.     0x00084000, 0x00080010, 0x40004010, 0x00000000, 0x40000000, 0x00004000, 0x00084010, 0x40080000,
  131.     0x00080010, 0x40000010, 0x00000000, 0x00084000, 0x00004010, 0x40084000, 0x40080000, 0x00004010,
  132.     0x00000000, 0x00084010, 0x40080010, 0x00080000, 0x40004010, 0x40080000, 0x40084000, 0x00004000,
  133.     0x40080000, 0x40004000, 0x00000010, 0x40084010, 0x00084010, 0x00000010, 0x00004000, 0x40000000,
  134.     0x00004010, 0x40084000, 0x00080000, 0x40000010, 0x00080010, 0x40004010, 0x40000010, 0x00080010,
  135.     0x00084000, 0x00000000, 0x40004000, 0x00004010, 0x40000000, 0x40080010, 0x40084010, 0x00084000,
  136.     },
  137.     {
  138.     0x00000104, 0x04010100, 0x00000000, 0x04010004, 0x04000100, 0x00000000, 0x00010104, 0x04000100,
  139.     0x00010004, 0x04000004, 0x04000004, 0x00010000, 0x04010104, 0x00010004, 0x04010000, 0x00000104,
  140.     0x04000000, 0x00000004, 0x04010100, 0x00000100, 0x00010100, 0x04010000, 0x04010004, 0x00010104,
  141.     0x04000104, 0x00010100, 0x00010000, 0x04000104, 0x00000004, 0x04010104, 0x00000100, 0x04000000,
  142.     0x04010100, 0x04000000, 0x00010004, 0x00000104, 0x00010000, 0x04010100, 0x04000100, 0x00000000,
  143.     0x00000100, 0x00010004, 0x04010104, 0x04000100, 0x04000004, 0x00000100, 0x00000000, 0x04010004,
  144.     0x04000104, 0x00010000, 0x04000000, 0x04010104, 0x00000004, 0x00010104, 0x00010100, 0x04000004,
  145.     0x04010000, 0x04000104, 0x00000104, 0x04010000, 0x00010104, 0x00000004, 0x04010004, 0x00010100,
  146.     },
  147.     {
  148.     0x80401000, 0x80001040, 0x80001040, 0x00000040, 0x00401040, 0x80400040, 0x80400000, 0x80001000,
  149.     0x00000000, 0x00401000, 0x00401000, 0x80401040, 0x80000040, 0x00000000, 0x00400040, 0x80400000,
  150.     0x80000000, 0x00001000, 0x00400000, 0x80401000, 0x00000040, 0x00400000, 0x80001000, 0x00001040,
  151.     0x80400040, 0x80000000, 0x00001040, 0x00400040, 0x00001000, 0x00401040, 0x80401040, 0x80000040,
  152.     0x00400040, 0x80400000, 0x00401000, 0x80401040, 0x80000040, 0x00000000, 0x00000000, 0x00401000,
  153.     0x00001040, 0x00400040, 0x80400040, 0x80000000, 0x80401000, 0x80001040, 0x80001040, 0x00000040,
  154.     0x80401040, 0x80000040, 0x80000000, 0x00001000, 0x80400000, 0x80001000, 0x00401040, 0x80400040,
  155.     0x80001000, 0x00001040, 0x00400000, 0x80401000, 0x00000040, 0x00400000, 0x00001000, 0x00401040,
  156.     },
  157.     {
  158.     0x00000080, 0x01040080, 0x01040000, 0x21000080, 0x00040000, 0x00000080, 0x20000000, 0x01040000,
  159.     0x20040080, 0x00040000, 0x01000080, 0x20040080, 0x21000080, 0x21040000, 0x00040080, 0x20000000,
  160.     0x01000000, 0x20040000, 0x20040000, 0x00000000, 0x20000080, 0x21040080, 0x21040080, 0x01000080,
  161.     0x21040000, 0x20000080, 0x00000000, 0x21000000, 0x01040080, 0x01000000, 0x21000000, 0x00040080,
  162.     0x00040000, 0x21000080, 0x00000080, 0x01000000, 0x20000000, 0x01040000, 0x21000080, 0x20040080,
  163.     0x01000080, 0x20000000, 0x21040000, 0x01040080, 0x20040080, 0x00000080, 0x01000000, 0x21040000,
  164.     0x21040080, 0x00040080, 0x21000000, 0x21040080, 0x01040000, 0x00000000, 0x20040000, 0x21000000,
  165.     0x00040080, 0x01000080, 0x20000080, 0x00040000, 0x00000000, 0x20040000, 0x01040080, 0x20000080,
  166.     },
  167.     {
  168.     0x10000008, 0x10200000, 0x00002000, 0x10202008, 0x10200000, 0x00000008, 0x10202008, 0x00200000,
  169.     0x10002000, 0x00202008, 0x00200000, 0x10000008, 0x00200008, 0x10002000, 0x10000000, 0x00002008,
  170.     0x00000000, 0x00200008, 0x10002008, 0x00002000, 0x00202000, 0x10002008, 0x00000008, 0x10200008,
  171.     0x10200008, 0x00000000, 0x00202008, 0x10202000, 0x00002008, 0x00202000, 0x10202000, 0x10000000,
  172.     0x10002000, 0x00000008, 0x10200008, 0x00202000, 0x10202008, 0x00200000, 0x00002008, 0x10000008,
  173.     0x00200000, 0x10002000, 0x10000000, 0x00002008, 0x10000008, 0x10202008, 0x00202000, 0x10200000,
  174.     0x00202008, 0x10202000, 0x00000000, 0x10200008, 0x00000008, 0x00002000, 0x10200000, 0x00202008,
  175.     0x00002000, 0x00200008, 0x10002008, 0x00000000, 0x10202000, 0x10000000, 0x00200008, 0x10002008,
  176.     },
  177.     {
  178.     0x00100000, 0x02100001, 0x02000401, 0x00000000, 0x00000400, 0x02000401, 0x00100401, 0x02100400,
  179.     0x02100401, 0x00100000, 0x00000000, 0x02000001, 0x00000001, 0x02000000, 0x02100001, 0x00000401,
  180.     0x02000400, 0x00100401, 0x00100001, 0x02000400, 0x02000001, 0x02100000, 0x02100400, 0x00100001,
  181.     0x02100000, 0x00000400, 0x00000401, 0x02100401, 0x00100400, 0x00000001, 0x02000000, 0x00100400,
  182.     0x02000000, 0x00100400, 0x00100000, 0x02000401, 0x02000401, 0x02100001, 0x02100001, 0x00000001,
  183.     0x00100001, 0x02000000, 0x02000400, 0x00100000, 0x02100400, 0x00000401, 0x00100401, 0x02100400,
  184.     0x00000401, 0x02000001, 0x02100401, 0x02100000, 0x00100400, 0x00000000, 0x00000001, 0x02100401,
  185.     0x00000000, 0x00100401, 0x02100000, 0x00000400, 0x02000001, 0x02000400, 0x00000400, 0x00100001,
  186.     },
  187.     {
  188.     0x08000820, 0x00000800, 0x00020000, 0x08020820, 0x08000000, 0x08000820, 0x00000020, 0x08000000,
  189.     0x00020020, 0x08020000, 0x08020820, 0x00020800, 0x08020800, 0x00020820, 0x00000800, 0x00000020,
  190.     0x08020000, 0x08000020, 0x08000800, 0x00000820, 0x00020800, 0x00020020, 0x08020020, 0x08020800,
  191.     0x00000820, 0x00000000, 0x00000000, 0x08020020, 0x08000020, 0x08000800, 0x00020820, 0x00020000,
  192.     0x00020820, 0x00020000, 0x08020800, 0x00000800, 0x00000020, 0x08020020, 0x00000800, 0x00020820,
  193.     0x08000800, 0x00000020, 0x08000020, 0x08020000, 0x08020020, 0x08000000, 0x00020000, 0x08000820,
  194.     0x00000000, 0x08020820, 0x00020020, 0x08000020, 0x08020000, 0x08000800, 0x08000820, 0x00000000,
  195.     0x08020820, 0x00020800, 0x00020800, 0x00000820, 0x00000820, 0x00020020, 0x08000000, 0x08020800,
  196.     },
  197. };
  198. #endif
  199.  
  200. static uint64_t shuffle(uint64_t in, const uint8_t *shuffle, int shuffle_len) {
  201.     int i;
  202.     uint64_t res = 0;
  203.     for (i = 0; i < shuffle_len; i++)
  204.         res += res + ((in >> *shuffle++) & 1);
  205.     return res;
  206. }
  207.  
  208. static uint64_t shuffle_inv(uint64_t in, const uint8_t *shuffle, int shuffle_len) {
  209.     int i;
  210.     uint64_t res = 0;
  211.     shuffle += shuffle_len - 1;
  212.     for (i = 0; i < shuffle_len; i++) {
  213.         res |= (in & 1) << *shuffle--;
  214.         in >>= 1;
  215.     }
  216.     return res;
  217. }
  218.  
  219. static uint32_t f_func(uint32_t r, uint64_t k) {
  220.     int i;
  221.     uint32_t out = 0;
  222.     // rotate to get first part of E-shuffle in the lowest 6 bits
  223.     r = (r << 1) | (r >> 31);
  224.     // apply S-boxes, those compress the data again from 8 * 6 to 8 * 4 bits
  225.     for (i = 7; i >= 0; i--) {
  226.         uint8_t tmp = (r ^ k) & 0x3f;
  227. #if CONFIG_SMALL
  228.         uint8_t v = S_boxes[i][tmp >> 1];
  229.         if (tmp & 1) v >>= 4;
  230.         out = (out >> 4) | (v << 28);
  231. #else
  232.         out |= S_boxes_P_shuffle[i][tmp];
  233. #endif
  234.         // get next 6 bits of E-shuffle and round key k into the lowest bits
  235.         r = (r >> 4) | (r << 28);
  236.         k >>= 6;
  237.     }
  238. #if CONFIG_SMALL
  239.     out = shuffle(out, P_shuffle, sizeof(P_shuffle));
  240. #endif
  241.     return out;
  242. }
  243.  
  244. /**
  245.  * @brief rotate the two halves of the expanded 56 bit key each 1 bit left
  246.  *
  247.  * Note: the specification calls this "shift", so I kept it although
  248.  * it is confusing.
  249.  */
  250. static uint64_t key_shift_left(uint64_t CDn) {
  251.     uint64_t carries = (CDn >> 27) & 0x10000001;
  252.     CDn <<= 1;
  253.     CDn &= ~0x10000001;
  254.     CDn |= carries;
  255.     return CDn;
  256. }
  257.  
  258. static void gen_roundkeys(uint64_t K[16], uint64_t key) {
  259.     int i;
  260.     // discard parity bits from key and shuffle it into C and D parts
  261.     uint64_t CDn = shuffle(key, PC1_shuffle, sizeof(PC1_shuffle));
  262.     // generate round keys
  263.     for (i = 0; i < 16; i++) {
  264.         CDn = key_shift_left(CDn);
  265.         if (i > 1 && i != 8 && i != 15)
  266.             CDn = key_shift_left(CDn);
  267.         K[i] = shuffle(CDn, PC2_shuffle, sizeof(PC2_shuffle));
  268.     }
  269. }
  270.  
  271. static uint64_t des_encdec(uint64_t in, uint64_t K[16], int decrypt) {
  272.     int i;
  273.     // used to apply round keys in reverse order for decryption
  274.     decrypt = decrypt ? 15 : 0;
  275.     // shuffle irrelevant to security but to ease hardware implementations
  276.     in = shuffle(in, IP_shuffle, sizeof(IP_shuffle));
  277.     for (i = 0; i < 16; i++) {
  278.         uint32_t f_res;
  279.         f_res = f_func(in, K[decrypt ^ i]);
  280.         in = (in << 32) | (in >> 32);
  281.         in ^= f_res;
  282.     }
  283.     in = (in << 32) | (in >> 32);
  284.     // reverse shuffle used to ease hardware implementations
  285.     in = shuffle_inv(in, IP_shuffle, sizeof(IP_shuffle));
  286.     return in;
  287. }
  288.  
  289. int av_des_init(AVDES *d, const uint8_t *key, int key_bits, av_unused int decrypt) {
  290.     if (key_bits != 64 && key_bits != 192)
  291.         return -1;
  292.     d->triple_des = key_bits > 64;
  293.     gen_roundkeys(d->round_keys[0], AV_RB64(key));
  294.     if (d->triple_des) {
  295.         gen_roundkeys(d->round_keys[1], AV_RB64(key +  8));
  296.         gen_roundkeys(d->round_keys[2], AV_RB64(key + 16));
  297.     }
  298.     return 0;
  299. }
  300.  
  301. static void av_des_crypt_mac(AVDES *d, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt, int mac) {
  302.     uint64_t iv_val = iv ? AV_RB64(iv) : 0;
  303.     while (count-- > 0) {
  304.         uint64_t dst_val;
  305.         uint64_t src_val = src ? AV_RB64(src) : 0;
  306.         if (decrypt) {
  307.             uint64_t tmp = src_val;
  308.             if (d->triple_des) {
  309.                 src_val = des_encdec(src_val, d->round_keys[2], 1);
  310.                 src_val = des_encdec(src_val, d->round_keys[1], 0);
  311.             }
  312.             dst_val = des_encdec(src_val, d->round_keys[0], 1) ^ iv_val;
  313.             iv_val = iv ? tmp : 0;
  314.         } else {
  315.             dst_val = des_encdec(src_val ^ iv_val, d->round_keys[0], 0);
  316.             if (d->triple_des) {
  317.                 dst_val = des_encdec(dst_val, d->round_keys[1], 1);
  318.                 dst_val = des_encdec(dst_val, d->round_keys[2], 0);
  319.             }
  320.             iv_val = iv ? dst_val : 0;
  321.         }
  322.         AV_WB64(dst, dst_val);
  323.         src += 8;
  324.         if (!mac)
  325.             dst += 8;
  326.     }
  327.     if (iv)
  328.         AV_WB64(iv, iv_val);
  329. }
  330.  
  331. void av_des_crypt(AVDES *d, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt) {
  332.     av_des_crypt_mac(d, dst, src, count, iv, decrypt, 0);
  333. }
  334.  
  335. void av_des_mac(AVDES *d, uint8_t *dst, const uint8_t *src, int count) {
  336.     av_des_crypt_mac(d, dst, src, count, (uint8_t[8]){0}, 0, 1);
  337. }
  338.  
  339. #ifdef TEST
  340. #include <stdlib.h>
  341. #include <stdio.h>
  342.  
  343. #include "time.h"
  344.  
  345. static uint64_t rand64(void) {
  346.     uint64_t r = rand();
  347.     r = (r << 32) | rand();
  348.     return r;
  349. }
  350.  
  351. static const uint8_t test_key[] = {0x12, 0x34, 0x56, 0x78, 0x9a, 0xbc, 0xde, 0xf0};
  352. static const DECLARE_ALIGNED(8, uint8_t, plain)[] = {0xfe, 0xdc, 0xba, 0x98, 0x76, 0x54, 0x32, 0x10};
  353. static const DECLARE_ALIGNED(8, uint8_t, crypt)[] = {0x4a, 0xb6, 0x5b, 0x3d, 0x4b, 0x06, 0x15, 0x18};
  354. static DECLARE_ALIGNED(8, uint8_t, tmp)[8];
  355. static DECLARE_ALIGNED(8, uint8_t, large_buffer)[10002][8];
  356. static const uint8_t cbc_key[] = {
  357.     0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef,
  358.     0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, 0x01,
  359.     0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, 0x01, 0x23
  360. };
  361.  
  362. static int run_test(int cbc, int decrypt) {
  363.     AVDES d;
  364.     int delay = cbc && !decrypt ? 2 : 1;
  365.     uint64_t res;
  366.     AV_WB64(large_buffer[0], 0x4e6f772069732074ULL);
  367.     AV_WB64(large_buffer[1], 0x1234567890abcdefULL);
  368.     AV_WB64(tmp,             0x1234567890abcdefULL);
  369.     av_des_init(&d, cbc_key, 192, decrypt);
  370.     av_des_crypt(&d, large_buffer[delay], large_buffer[0], 10000, cbc ? tmp : NULL, decrypt);
  371.     res = AV_RB64(large_buffer[9999 + delay]);
  372.     if (cbc) {
  373.         if (decrypt)
  374.             return res == 0xc5cecf63ecec514cULL;
  375.         else
  376.             return res == 0xcb191f85d1ed8439ULL;
  377.     } else {
  378.         if (decrypt)
  379.             return res == 0x8325397644091a0aULL;
  380.         else
  381.             return res == 0xdd17e8b8b437d232ULL;
  382.     }
  383. }
  384.  
  385. int main(void) {
  386.     AVDES d;
  387.     int i;
  388. #ifdef GENTABLES
  389.     int j;
  390. #endif
  391.     uint64_t key[3];
  392.     uint64_t data;
  393.     uint64_t ct;
  394.     uint64_t roundkeys[16];
  395.     srand(av_gettime());
  396.     key[0] = AV_RB64(test_key);
  397.     data = AV_RB64(plain);
  398.     gen_roundkeys(roundkeys, key[0]);
  399.     if (des_encdec(data, roundkeys, 0) != AV_RB64(crypt)) {
  400.         printf("Test 1 failed\n");
  401.         return 1;
  402.     }
  403.     av_des_init(&d, test_key, 64, 0);
  404.     av_des_crypt(&d, tmp, plain, 1, NULL, 0);
  405.     if (memcmp(tmp, crypt, sizeof(crypt))) {
  406.         printf("Public API decryption failed\n");
  407.         return 1;
  408.     }
  409.     if (!run_test(0, 0) || !run_test(0, 1) || !run_test(1, 0) || !run_test(1, 1)) {
  410.         printf("Partial Monte-Carlo test failed\n");
  411.         return 1;
  412.     }
  413.     for (i = 0; i < 1000; i++) {
  414.         key[0] = rand64(); key[1] = rand64(); key[2] = rand64();
  415.         data = rand64();
  416.         av_des_init(&d, (uint8_t*)key, 192, 0);
  417.         av_des_crypt(&d, (uint8_t*)&ct, (uint8_t*)&data, 1, NULL, 0);
  418.         av_des_init(&d, (uint8_t*)key, 192, 1);
  419.         av_des_crypt(&d, (uint8_t*)&ct, (uint8_t*)&ct, 1, NULL, 1);
  420.         if (ct != data) {
  421.             printf("Test 2 failed\n");
  422.             return 1;
  423.         }
  424.     }
  425. #ifdef GENTABLES
  426.     printf("static const uint32_t S_boxes_P_shuffle[8][64] = {\n");
  427.     for (i = 0; i < 8; i++) {
  428.         printf("    {");
  429.         for (j = 0; j < 64; j++) {
  430.             uint32_t v = S_boxes[i][j >> 1];
  431.             v = j & 1 ? v >> 4 : v & 0xf;
  432.             v <<= 28 - 4 * i;
  433.             v = shuffle(v, P_shuffle, sizeof(P_shuffle));
  434.             printf((j & 7) == 0 ? "\n    " : " ");
  435.             printf("0x%08X,", v);
  436.         }
  437.         printf("\n    },\n");
  438.     }
  439.     printf("};\n");
  440. #endif
  441.     return 0;
  442. }
  443. #endif
  444.