libavutil/des.c

   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 #define T(a, b, c, d) 32-a,32-b,32-c,32-d
  43 static const uint8_t P_shuffle[] = {
  44     T(16,  7, 20, 21),
  45     T(29, 12, 28, 17),
  46     T( 1, 15, 23, 26),
  47     T( 5, 18, 31, 10),
  48     T( 2,  8, 24, 14),
  49     T(32, 27,  3,  9),
  50     T(19, 13, 30,  6),
  51     T(22, 11,  4, 25)
  52 };
  53 #undef T
  54
  55 #define T(a, b, c, d, e, f, g) 64-a,64-b,64-c,64-d,64-e,64-f,64-g
  56 static const uint8_t PC1_shuffle[] = {
  57     T(57, 49, 41, 33, 25, 17,  9),
  58     T( 1, 58, 50, 42, 34, 26, 18),
  59     T(10,  2, 59, 51, 43, 35, 27),
  60     T(19, 11,  3, 60, 52, 44, 36),
  61     T(63, 55, 47, 39, 31, 23, 15),
  62     T( 7, 62, 54, 46, 38, 30, 22),
  63     T(14,  6, 61, 53, 45, 37, 29),
  64     T(21, 13,  5, 28, 20, 12,  4)
  65 };
  66 #undef T
  67
  68 #define T(a, b, c, d, e, f) 56-a,56-b,56-c,56-d,56-e,56-f
  69 static const uint8_t PC2_shuffle[] = {
  70     T(14, 17, 11, 24,  1,  5),
  71     T( 3, 28, 15,  6, 21, 10),
  72     T(23, 19, 12,  4, 26,  8),
  73     T(16,  7, 27, 20, 13,  2),
  74     T(41, 52, 31, 37, 47, 55),
  75     T(30, 40, 51, 45, 33, 48),
  76     T(44, 49, 39, 56, 34, 53),
  77     T(46, 42, 50, 36, 29, 32)
  78 };
  79 #undef T
  80
  81 #if CONFIG_SMALL
  82 static const uint8_t S_boxes[8][32] = {
  83     {
  84     0x0e, 0xf4, 0x7d, 0x41, 0xe2, 0x2f, 0xdb, 0x18, 0xa3, 0x6a, 0xc6, 0xbc, 0x95, 0x59, 0x30, 0x87,
  85     0xf4, 0xc1, 0x8e, 0x28, 0x4d, 0x96, 0x12, 0x7b, 0x5f, 0xbc, 0x39, 0xe7, 0xa3, 0x0a, 0x65, 0xd0,
  86     }, {
  87     0x3f, 0xd1, 0x48, 0x7e, 0xf6, 0x2b, 0x83, 0xe4, 0xc9, 0x07, 0x12, 0xad, 0x6c, 0x90, 0xb5, 0x5a,
  88     0xd0, 0x8e, 0xa7, 0x1b, 0x3a, 0xf4, 0x4d, 0x21, 0xb5, 0x68, 0x7c, 0xc6, 0x09, 0x53, 0xe2, 0x9f,
  89     }, {
  90     0xda, 0x70, 0x09, 0x9e, 0x36, 0x43, 0x6f, 0xa5, 0x21, 0x8d, 0x5c, 0xe7, 0xcb, 0xb4, 0xf2, 0x18,
  91     0x1d, 0xa6, 0xd4, 0x09, 0x68, 0x9f, 0x83, 0x70, 0x4b, 0xf1, 0xe2, 0x3c, 0xb5, 0x5a, 0x2e, 0xc7,
  92     }, {
  93     0xd7, 0x8d, 0xbe, 0x53, 0x60, 0xf6, 0x09, 0x3a, 0x41, 0x72, 0x28, 0xc5, 0x1b, 0xac, 0xe4, 0x9f,
  94     0x3a, 0xf6, 0x09, 0x60, 0xac, 0x1b, 0xd7, 0x8d, 0x9f, 0x41, 0x53, 0xbe, 0xc5, 0x72, 0x28, 0xe4,
  95     }, {
  96     0xe2, 0xbc, 0x24, 0xc1, 0x47, 0x7a, 0xdb, 0x16, 0x58, 0x05, 0xf3, 0xaf, 0x3d, 0x90, 0x8e, 0x69,
  97     0xb4, 0x82, 0xc1, 0x7b, 0x1a, 0xed, 0x27, 0xd8, 0x6f, 0xf9, 0x0c, 0x95, 0xa6, 0x43, 0x50, 0x3e,
  98     }, {
  99     0xac, 0xf1, 0x4a, 0x2f, 0x79, 0xc2, 0x96, 0x58, 0x60, 0x1d, 0xd3, 0xe4, 0x0e, 0xb7, 0x35, 0x8b,
 100     0x49, 0x3e, 0x2f, 0xc5, 0x92, 0x58, 0xfc, 0xa3, 0xb7, 0xe0, 0x14, 0x7a, 0x61, 0x0d, 0x8b, 0xd6,
 101     }, {
 102     0xd4, 0x0b, 0xb2, 0x7e, 0x4f, 0x90, 0x18, 0xad, 0xe3, 0x3c, 0x59, 0xc7, 0x25, 0xfa, 0x86, 0x61,
 103     0x61, 0xb4, 0xdb, 0x8d, 0x1c, 0x43, 0xa7, 0x7e, 0x9a, 0x5f, 0x06, 0xf8, 0xe0, 0x25, 0x39, 0xc2,
 104     }, {
 105     0x1d, 0xf2, 0xd8, 0x84, 0xa6, 0x3f, 0x7b, 0x41, 0xca, 0x59, 0x63, 0xbe, 0x05, 0xe0, 0x9c, 0x27,
 106     0x27, 0x1b, 0xe4, 0x71, 0x49, 0xac, 0x8e, 0xd2, 0xf0, 0xc6, 0x9a, 0x0d, 0x3f, 0x53, 0x65, 0xb8,
 107     }
 108 };
 109 #else
 110 /**
 111  * This table contains the results of applying both the S-box and P-shuffle.
 112  * It can be regenerated by compiling this file with -DCONFIG_SMALL -DTEST -DGENTABLES
 113  */
 114 static const uint32_t S_boxes_P_shuffle[8][64] = {
 115     {
 116     0x00808200, 0x00000000, 0x00008000, 0x00808202, 0x00808002, 0x00008202, 0x00000002, 0x00008000,
 117     0x00000200, 0x00808200, 0x00808202, 0x00000200, 0x00800202, 0x00808002, 0x00800000, 0x00000002,
 118     0x00000202, 0x00800200, 0x00800200, 0x00008200, 0x00008200, 0x00808000, 0x00808000, 0x00800202,
 119     0x00008002, 0x00800002, 0x00800002, 0x00008002, 0x00000000, 0x00000202, 0x00008202, 0x00800000,
 120     0x00008000, 0x00808202, 0x00000002, 0x00808000, 0x00808200, 0x00800000, 0x00800000, 0x00000200,
 121     0x00808002, 0x00008000, 0x00008200, 0x00800002, 0x00000200, 0x00000002, 0x00800202, 0x00008202,
 122     0x00808202, 0x00008002, 0x00808000, 0x00800202, 0x00800002, 0x00000202, 0x00008202, 0x00808200,
 123     0x00000202, 0x00800200, 0x00800200, 0x00000000, 0x00008002, 0x00008200, 0x00000000, 0x00808002,
 124     },
 125     {
 126     0x40084010, 0x40004000, 0x00004000, 0x00084010, 0x00080000, 0x00000010, 0x40080010, 0x40004010,
 127     0x40000010, 0x40084010, 0x40084000, 0x40000000, 0x40004000, 0x00080000, 0x00000010, 0x40080010,
 128     0x00084000, 0x00080010, 0x40004010, 0x00000000, 0x40000000, 0x00004000, 0x00084010, 0x40080000,
 129     0x00080010, 0x40000010, 0x00000000, 0x00084000, 0x00004010, 0x40084000, 0x40080000, 0x00004010,
 130     0x00000000, 0x00084010, 0x40080010, 0x00080000, 0x40004010, 0x40080000, 0x40084000, 0x00004000,
 131     0x40080000, 0x40004000, 0x00000010, 0x40084010, 0x00084010, 0x00000010, 0x00004000, 0x40000000,
 132     0x00004010, 0x40084000, 0x00080000, 0x40000010, 0x00080010, 0x40004010, 0x40000010, 0x00080010,
 133     0x00084000, 0x00000000, 0x40004000, 0x00004010, 0x40000000, 0x40080010, 0x40084010, 0x00084000,
 134     },
 135     {
 136     0x00000104, 0x04010100, 0x00000000, 0x04010004, 0x04000100, 0x00000000, 0x00010104, 0x04000100,
 137     0x00010004, 0x04000004, 0x04000004, 0x00010000, 0x04010104, 0x00010004, 0x04010000, 0x00000104,
 138     0x04000000, 0x00000004, 0x04010100, 0x00000100, 0x00010100, 0x04010000, 0x04010004, 0x00010104,
 139     0x04000104, 0x00010100, 0x00010000, 0x04000104, 0x00000004, 0x04010104, 0x00000100, 0x04000000,
 140     0x04010100, 0x04000000, 0x00010004, 0x00000104, 0x00010000, 0x04010100, 0x04000100, 0x00000000,
 141     0x00000100, 0x00010004, 0x04010104, 0x04000100, 0x04000004, 0x00000100, 0x00000000, 0x04010004,
 142     0x04000104, 0x00010000, 0x04000000, 0x04010104, 0x00000004, 0x00010104, 0x00010100, 0x04000004,
 143     0x04010000, 0x04000104, 0x00000104, 0x04010000, 0x00010104, 0x00000004, 0x04010004, 0x00010100,
 144     },
 145     {
 146     0x80401000, 0x80001040, 0x80001040, 0x00000040, 0x00401040, 0x80400040, 0x80400000, 0x80001000,
 147     0x00000000, 0x00401000, 0x00401000, 0x80401040, 0x80000040, 0x00000000, 0x00400040, 0x80400000,
 148     0x80000000, 0x00001000, 0x00400000, 0x80401000, 0x00000040, 0x00400000, 0x80001000, 0x00001040,
 149     0x80400040, 0x80000000, 0x00001040, 0x00400040, 0x00001000, 0x00401040, 0x80401040, 0x80000040,
 150     0x00400040, 0x80400000, 0x00401000, 0x80401040, 0x80000040, 0x00000000, 0x00000000, 0x00401000,
 151     0x00001040, 0x00400040, 0x80400040, 0x80000000, 0x80401000, 0x80001040, 0x80001040, 0x00000040,
 152     0x80401040, 0x80000040, 0x80000000, 0x00001000, 0x80400000, 0x80001000, 0x00401040, 0x80400040,
 153     0x80001000, 0x00001040, 0x00400000, 0x80401000, 0x00000040, 0x00400000, 0x00001000, 0x00401040,
 154     },
 155     {
 156     0x00000080, 0x01040080, 0x01040000, 0x21000080, 0x00040000, 0x00000080, 0x20000000, 0x01040000,
 157     0x20040080, 0x00040000, 0x01000080, 0x20040080, 0x21000080, 0x21040000, 0x00040080, 0x20000000,
 158     0x01000000, 0x20040000, 0x20040000, 0x00000000, 0x20000080, 0x21040080, 0x21040080, 0x01000080,
 159     0x21040000, 0x20000080, 0x00000000, 0x21000000, 0x01040080, 0x01000000, 0x21000000, 0x00040080,
 160     0x00040000, 0x21000080, 0x00000080, 0x01000000, 0x20000000, 0x01040000, 0x21000080, 0x20040080,
 161     0x01000080, 0x20000000, 0x21040000, 0x01040080, 0x20040080, 0x00000080, 0x01000000, 0x21040000,
 162     0x21040080, 0x00040080, 0x21000000, 0x21040080, 0x01040000, 0x00000000, 0x20040000, 0x21000000,
 163     0x00040080, 0x01000080, 0x20000080, 0x00040000, 0x00000000, 0x20040000, 0x01040080, 0x20000080,
 164     },
 165     {
 166     0x10000008, 0x10200000, 0x00002000, 0x10202008, 0x10200000, 0x00000008, 0x10202008, 0x00200000,
 167     0x10002000, 0x00202008, 0x00200000, 0x10000008, 0x00200008, 0x10002000, 0x10000000, 0x00002008,
 168     0x00000000, 0x00200008, 0x10002008, 0x00002000, 0x00202000, 0x10002008, 0x00000008, 0x10200008,
 169     0x10200008, 0x00000000, 0x00202008, 0x10202000, 0x00002008, 0x00202000, 0x10202000, 0x10000000,
 170     0x10002000, 0x00000008, 0x10200008, 0x00202000, 0x10202008, 0x00200000, 0x00002008, 0x10000008,
 171     0x00200000, 0x10002000, 0x10000000, 0x00002008, 0x10000008, 0x10202008, 0x00202000, 0x10200000,
 172     0x00202008, 0x10202000, 0x00000000, 0x10200008, 0x00000008, 0x00002000, 0x10200000, 0x00202008,
 173     0x00002000, 0x00200008, 0x10002008, 0x00000000, 0x10202000, 0x10000000, 0x00200008, 0x10002008,
 174     },
 175     {
 176     0x00100000, 0x02100001, 0x02000401, 0x00000000, 0x00000400, 0x02000401, 0x00100401, 0x02100400,
 177     0x02100401, 0x00100000, 0x00000000, 0x02000001, 0x00000001, 0x02000000, 0x02100001, 0x00000401,
 178     0x02000400, 0x00100401, 0x00100001, 0x02000400, 0x02000001, 0x02100000, 0x02100400, 0x00100001,
 179     0x02100000, 0x00000400, 0x00000401, 0x02100401, 0x00100400, 0x00000001, 0x02000000, 0x00100400,
 180     0x02000000, 0x00100400, 0x00100000, 0x02000401, 0x02000401, 0x02100001, 0x02100001, 0x00000001,
 181     0x00100001, 0x02000000, 0x02000400, 0x00100000, 0x02100400, 0x00000401, 0x00100401, 0x02100400,
 182     0x00000401, 0x02000001, 0x02100401, 0x02100000, 0x00100400, 0x00000000, 0x00000001, 0x02100401,
 183     0x00000000, 0x00100401, 0x02100000, 0x00000400, 0x02000001, 0x02000400, 0x00000400, 0x00100001,
 184     },
 185     {
 186     0x08000820, 0x00000800, 0x00020000, 0x08020820, 0x08000000, 0x08000820, 0x00000020, 0x08000000,
 187     0x00020020, 0x08020000, 0x08020820, 0x00020800, 0x08020800, 0x00020820, 0x00000800, 0x00000020,
 188     0x08020000, 0x08000020, 0x08000800, 0x00000820, 0x00020800, 0x00020020, 0x08020020, 0x08020800,
 189     0x00000820, 0x00000000, 0x00000000, 0x08020020, 0x08000020, 0x08000800, 0x00020820, 0x00020000,
 190     0x00020820, 0x00020000, 0x08020800, 0x00000800, 0x00000020, 0x08020020, 0x00000800, 0x00020820,
 191     0x08000800, 0x00000020, 0x08000020, 0x08020000, 0x08020020, 0x08000000, 0x00020000, 0x08000820,
 192     0x00000000, 0x08020820, 0x00020020, 0x08000020, 0x08020000, 0x08000800, 0x08000820, 0x00000000,
 193     0x08020820, 0x00020800, 0x00020800, 0x00000820, 0x00000820, 0x00020020, 0x08000000, 0x08020800,
 194     },
 195 };
 196 #endif
 197
 198 static uint64_t shuffle(uint64_t in, const uint8_t *shuffle, int shuffle_len) {
 199     int i;
 200     uint64_t res = 0;
 201     for (i = 0; i < shuffle_len; i++)
 202         res += res + ((in >> *shuffle++) & 1);
 203     return res;
 204 }
 205
 206 static uint64_t shuffle_inv(uint64_t in, const uint8_t *shuffle, int shuffle_len) {
 207     int i;
 208     uint64_t res = 0;
 209     shuffle += shuffle_len - 1;
 210     for (i = 0; i < shuffle_len; i++) {
 211         res |= (in & 1) << *shuffle--;
 212         in >>= 1;
 213     }
 214     return res;
 215 }
 216
 217 static uint32_t f_func(uint32_t r, uint64_t k) {
 218     int i;
 219     uint32_t out = 0;
 220     // rotate to get first part of E-shuffle in the lowest 6 bits
 221     r = (r << 1) | (r >> 31);
 222     // apply S-boxes, those compress the data again from 8 * 6 to 8 * 4 bits
 223     for (i = 7; i >= 0; i--) {
 224         uint8_t tmp = (r ^ k) & 0x3f;
 225 #if CONFIG_SMALL
 226         uint8_t v = S_boxes[i][tmp >> 1];
 227         if (tmp & 1) v >>= 4;
 228         out = (out >> 4) | (v << 28);
 229 #else
 230         out |= S_boxes_P_shuffle[i][tmp];
 231 #endif
 232         // get next 6 bits of E-shuffle and round key k into the lowest bits
 233         r = (r >> 4) | (r << 28);
 234         k >>= 6;
 235     }
 236 #if CONFIG_SMALL
 237     out = shuffle(out, P_shuffle, sizeof(P_shuffle));
 238 #endif
 239     return out;
 240 }
 241
 242 /**
 243  * \brief rotate the two halves of the expanded 56 bit key each 1 bit left
 244  *
 245  * Note: the specification calls this "shift", so I kept it although
 246  * it is confusing.
 247  */
 248 static uint64_t key_shift_left(uint64_t CDn) {
 249     uint64_t carries = (CDn >> 27) & 0x10000001;
 250     CDn <<= 1;
 251     CDn &= ~0x10000001;
 252     CDn |= carries;
 253     return CDn;
 254 }
 255
 256 static void gen_roundkeys(uint64_t K[16], uint64_t key) {
 257     int i;
 258     // discard parity bits from key and shuffle it into C and D parts
 259     uint64_t CDn = shuffle(key, PC1_shuffle, sizeof(PC1_shuffle));
 260     // generate round keys
 261     for (i = 0; i < 16; i++) {
 262         CDn = key_shift_left(CDn);
 263         if (i > 1 && i != 8 && i != 15)
 264             CDn = key_shift_left(CDn);
 265         K[i] = shuffle(CDn, PC2_shuffle, sizeof(PC2_shuffle));
 266     }
 267 }
 268
 269 static uint64_t des_encdec(uint64_t in, uint64_t K[16], int decrypt) {
 270     int i;
 271     // used to apply round keys in reverse order for decryption
 272     decrypt = decrypt ? 15 : 0;
 273     // shuffle irrelevant to security but to ease hardware implementations
 274     in = shuffle(in, IP_shuffle, sizeof(IP_shuffle));
 275     for (i = 0; i < 16; i++) {
 276         uint32_t f_res;
 277         f_res = f_func(in, K[decrypt ^ i]);
 278         in = (in << 32) | (in >> 32);
 279         in ^= f_res;
 280     }
 281     in = (in << 32) | (in >> 32);
 282     // reverse shuffle used to ease hardware implementations
 283     in = shuffle_inv(in, IP_shuffle, sizeof(IP_shuffle));
 284     return in;
 285 }
 286
 287 int av_des_init(AVDES *d, const uint8_t *key, int key_bits, int decrypt) {
 288     if (key_bits != 64 && key_bits != 192)
 289         return -1;
 290     d->triple_des = key_bits > 64;
 291     gen_roundkeys(d->round_keys[0], AV_RB64(key));
 292     if (d->triple_des) {
 293         gen_roundkeys(d->round_keys[1], AV_RB64(key +  8));
 294         gen_roundkeys(d->round_keys[2], AV_RB64(key + 16));
 295     }
 296     return 0;
 297 }
 298
 299 void av_des_crypt(AVDES *d, uint8_t *dst, const uint8_t *src, int count, uint8_t *iv, int decrypt) {
 300     uint64_t iv_val = iv ? be2me_64(*(uint64_t *)iv) : 0;
 301     while (count-- > 0) {
 302         uint64_t dst_val;
 303         uint64_t src_val = src ? be2me_64(*(const uint64_t *)src) : 0;
 304         if (decrypt) {
 305             uint64_t tmp = src_val;
 306             if (d->triple_des) {
 307                 src_val = des_encdec(src_val, d->round_keys[2], 1);
 308                 src_val = des_encdec(src_val, d->round_keys[1], 0);
 309             }
 310             dst_val = des_encdec(src_val, d->round_keys[0], 1) ^ iv_val;
 311             iv_val = iv ? tmp : 0;
 312         } else {
 313             dst_val = des_encdec(src_val ^ iv_val, d->round_keys[0], 0);
 314             if (d->triple_des) {
 315                 dst_val = des_encdec(dst_val, d->round_keys[1], 1);
 316                 dst_val = des_encdec(dst_val, d->round_keys[2], 0);
 317             }
 318             iv_val = iv ? dst_val : 0;
 319         }
 320         *(uint64_t *)dst = be2me_64(dst_val);
 321         src += 8;
 322         dst += 8;
 323     }
 324     if (iv)
 325         *(uint64_t *)iv = be2me_64(iv_val);
 326 }
 327
 328 #ifdef TEST
 329 #undef printf
 330 #undef rand
 331 #undef srand
 332 #include <stdlib.h>
 333 #include <stdio.h>
 334 #include <sys/time.h>
 335 static uint64_t rand64(void) {
 336     uint64_t r = rand();
 337     r = (r << 32) | rand();
 338     return r;
 339 }
 340
 341 static const uint8_t test_key[] = {0x12, 0x34, 0x56, 0x78, 0x9a, 0xbc, 0xde, 0xf0};
 342 static const DECLARE_ALIGNED(8, uint8_t, plain[]) = {0xfe, 0xdc, 0xba, 0x98, 0x76, 0x54, 0x32, 0x10};
 343 static const DECLARE_ALIGNED(8, uint8_t, crypt[]) = {0x4a, 0xb6, 0x5b, 0x3d, 0x4b, 0x06, 0x15, 0x18};
 344 static DECLARE_ALIGNED(8, uint8_t, tmp[8]);
 345 static DECLARE_ALIGNED(8, uint8_t, large_buffer[10002][8]);
 346 static const uint8_t cbc_key[] = {
 347     0x01, 0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef,
 348     0x23, 0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, 0x01,
 349     0x45, 0x67, 0x89, 0xab, 0xcd, 0xef, 0x01, 0x23
 350 };
 351
 352 static int run_test(int cbc, int decrypt) {
 353     AVDES d;
 354     int delay = cbc && !decrypt ? 2 : 1;
 355     uint64_t res;
 356     AV_WB64(large_buffer[0], 0x4e6f772069732074ULL);
 357     AV_WB64(large_buffer[1], 0x1234567890abcdefULL);
 358     AV_WB64(tmp,             0x1234567890abcdefULL);
 359     av_des_init(&d, cbc_key, 192, decrypt);
 360     av_des_crypt(&d, large_buffer[delay], large_buffer[0], 10000, cbc ? tmp : NULL, decrypt);
 361     res = AV_RB64(large_buffer[9999 + delay]);
 362     if (cbc) {
 363         if (decrypt)
 364             return res == 0xc5cecf63ecec514cULL;
 365         else
 366             return res == 0xcb191f85d1ed8439ULL;
 367     } else {
 368         if (decrypt)
 369             return res == 0x8325397644091a0aULL;
 370         else
 371             return res == 0xdd17e8b8b437d232ULL;
 372     }
 373 }
 374
 375 int main(void) {
 376     AVDES d;
 377     int i;
 378 #ifdef GENTABLES
 379     int j;
 380 #endif
 381     struct timeval tv;
 382     uint64_t key[3];
 383     uint64_t data;
 384     uint64_t ct;
 385     uint64_t roundkeys[16];
 386     gettimeofday(&tv, NULL);
 387     srand(tv.tv_sec * 1000 * 1000 + tv.tv_usec);
 388     key[0] = AV_RB64(test_key);
 389     data = AV_RB64(plain);
 390     gen_roundkeys(roundkeys, key[0]);
 391     if (des_encdec(data, roundkeys, 0) != AV_RB64(crypt)) {
 392         printf("Test 1 failed\n");
 393         return 1;
 394     }
 395     av_des_init(&d, test_key, 64, 0);
 396     av_des_crypt(&d, tmp, plain, 1, NULL, 0);
 397     if (memcmp(tmp, crypt, sizeof(crypt))) {
 398         printf("Public API decryption failed\n");
 399         return 1;
 400     }
 401     if (!run_test(0, 0) || !run_test(0, 1) || !run_test(1, 0) || !run_test(1, 1)) {
 402         printf("Partial Monte-Carlo test failed\n");
 403         return 1;
 404     }
 405     for (i = 0; i < 1000000; i++) {
 406         key[0] = rand64(); key[1] = rand64(); key[2] = rand64();
 407         data = rand64();
 408         av_des_init(&d, key, 192, 0);
 409         av_des_crypt(&d, &ct, &data, 1, NULL, 0);
 410         av_des_init(&d, key, 192, 1);
 411         av_des_crypt(&d, &ct, &ct, 1, NULL, 1);
 412         if (ct != data) {
 413             printf("Test 2 failed\n");
 414             return 1;
 415         }
 416     }
 417 #ifdef GENTABLES
 418     printf("static const uint32_t S_boxes_P_shuffle[8][64] = {\n");
 419     for (i = 0; i < 8; i++) {
 420         printf("    {");
 421         for (j = 0; j < 64; j++) {
 422             uint32_t v = S_boxes[i][j >> 1];
 423             v = j & 1 ? v >> 4 : v & 0xf;
 424             v <<= 28 - 4 * i;
 425             v = shuffle(v, P_shuffle, sizeof(P_shuffle));
 426             printf((j & 7) == 0 ? "\n    " : " ");
 427             printf("0x%08X,", v);
 428         }
 429         printf("\n    },\n");
 430     }
 431     printf("};\n");
 432 #endif
 433     return 0;
 434 }
 435 #endif