diff options
Diffstat (limited to 'contrib/ffmpeg/libavutil/des.c')
| -rw-r--r-- | contrib/ffmpeg/libavutil/des.c | 330 |
1 files changed, 0 insertions, 330 deletions
diff --git a/contrib/ffmpeg/libavutil/des.c b/contrib/ffmpeg/libavutil/des.c deleted file mode 100644 index 36f90ffaa..000000000 --- a/contrib/ffmpeg/libavutil/des.c +++ /dev/null @@ -1,330 +0,0 @@ -/* - * DES encryption/decryption - * Copyright (c) 2007 Reimar Doeffinger - * - * This file is part of FFmpeg. - * - * FFmpeg is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * FFmpeg is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with FFmpeg; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ -#include <inttypes.h> -#include "des.h" - -#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 -static const uint8_t IP_shuffle[] = { - T(58, 50, 42, 34, 26, 18, 10, 2), - T(60, 52, 44, 36, 28, 20, 12, 4), - T(62, 54, 46, 38, 30, 22, 14, 6), - T(64, 56, 48, 40, 32, 24, 16, 8), - T(57, 49, 41, 33, 25, 17, 9, 1), - T(59, 51, 43, 35, 27, 19, 11, 3), - T(61, 53, 45, 37, 29, 21, 13, 5), - T(63, 55, 47, 39, 31, 23, 15, 7) -}; -#undef T - -#define T(a, b, c, d) 32-a,32-b,32-c,32-d -static const uint8_t P_shuffle[] = { - T(16, 7, 20, 21), - T(29, 12, 28, 17), - T( 1, 15, 23, 26), - T( 5, 18, 31, 10), - T( 2, 8, 24, 14), - T(32, 27, 3, 9), - T(19, 13, 30, 6), - T(22, 11, 4, 25) -}; -#undef T - -#define T(a, b, c, d, e, f, g) 64-a,64-b,64-c,64-d,64-e,64-f,64-g -static const uint8_t PC1_shuffle[] = { - T(57, 49, 41, 33, 25, 17, 9), - T( 1, 58, 50, 42, 34, 26, 18), - T(10, 2, 59, 51, 43, 35, 27), - T(19, 11, 3, 60, 52, 44, 36), - T(63, 55, 47, 39, 31, 23, 15), - T( 7, 62, 54, 46, 38, 30, 22), - T(14, 6, 61, 53, 45, 37, 29), - T(21, 13, 5, 28, 20, 12, 4) -}; -#undef T - -#define T(a, b, c, d, e, f) 56-a,56-b,56-c,56-d,56-e,56-f -static const uint8_t PC2_shuffle[] = { - T(14, 17, 11, 24, 1, 5), - T( 3, 28, 15, 6, 21, 10), - T(23, 19, 12, 4, 26, 8), - T(16, 7, 27, 20, 13, 2), - T(41, 52, 31, 37, 47, 55), - T(30, 40, 51, 45, 33, 48), - T(44, 49, 39, 56, 34, 53), - T(46, 42, 50, 36, 29, 32) -}; -#undef T - -#ifdef CONFIG_SMALL -static const uint8_t S_boxes[8][32] = { - { - 0x0e, 0xf4, 0x7d, 0x41, 0xe2, 0x2f, 0xdb, 0x18, 0xa3, 0x6a, 0xc6, 0xbc, 0x95, 0x59, 0x30, 0x87, - 0xf4, 0xc1, 0x8e, 0x28, 0x4d, 0x96, 0x12, 0x7b, 0x5f, 0xbc, 0x39, 0xe7, 0xa3, 0x0a, 0x65, 0xd0, - }, { - 0x3f, 0xd1, 0x48, 0x7e, 0xf6, 0x2b, 0x83, 0xe4, 0xc9, 0x07, 0x12, 0xad, 0x6c, 0x90, 0xb5, 0x5a, - 0xd0, 0x8e, 0xa7, 0x1b, 0x3a, 0xf4, 0x4d, 0x21, 0xb5, 0x68, 0x7c, 0xc6, 0x09, 0x53, 0xe2, 0x9f, - }, { - 0xda, 0x70, 0x09, 0x9e, 0x36, 0x43, 0x6f, 0xa5, 0x21, 0x8d, 0x5c, 0xe7, 0xcb, 0xb4, 0xf2, 0x18, - 0x1d, 0xa6, 0xd4, 0x09, 0x68, 0x9f, 0x83, 0x70, 0x4b, 0xf1, 0xe2, 0x3c, 0xb5, 0x5a, 0x2e, 0xc7, - }, { - 0xd7, 0x8d, 0xbe, 0x53, 0x60, 0xf6, 0x09, 0x3a, 0x41, 0x72, 0x28, 0xc5, 0x1b, 0xac, 0xe4, 0x9f, - 0x3a, 0xf6, 0x09, 0x60, 0xac, 0x1b, 0xd7, 0x8d, 0x9f, 0x41, 0x53, 0xbe, 0xc5, 0x72, 0x28, 0xe4, - }, { - 0xe2, 0xbc, 0x24, 0xc1, 0x47, 0x7a, 0xdb, 0x16, 0x58, 0x05, 0xf3, 0xaf, 0x3d, 0x90, 0x8e, 0x69, - 0xb4, 0x82, 0xc1, 0x7b, 0x1a, 0xed, 0x27, 0xd8, 0x6f, 0xf9, 0x0c, 0x95, 0xa6, 0x43, 0x50, 0x3e, - }, { - 0xac, 0xf1, 0x4a, 0x2f, 0x79, 0xc2, 0x96, 0x58, 0x60, 0x1d, 0xd3, 0xe4, 0x0e, 0xb7, 0x35, 0x8b, - 0x49, 0x3e, 0x2f, 0xc5, 0x92, 0x58, 0xfc, 0xa3, 0xb7, 0xe0, 0x14, 0x7a, 0x61, 0x0d, 0x8b, 0xd6, - }, { - 0xd4, 0x0b, 0xb2, 0x7e, 0x4f, 0x90, 0x18, 0xad, 0xe3, 0x3c, 0x59, 0xc7, 0x25, 0xfa, 0x86, 0x61, - 0x61, 0xb4, 0xdb, 0x8d, 0x1c, 0x43, 0xa7, 0x7e, 0x9a, 0x5f, 0x06, 0xf8, 0xe0, 0x25, 0x39, 0xc2, - }, { - 0x1d, 0xf2, 0xd8, 0x84, 0xa6, 0x3f, 0x7b, 0x41, 0xca, 0x59, 0x63, 0xbe, 0x05, 0xe0, 0x9c, 0x27, - 0x27, 0x1b, 0xe4, 0x71, 0x49, 0xac, 0x8e, 0xd2, 0xf0, 0xc6, 0x9a, 0x0d, 0x3f, 0x53, 0x65, 0xb8, - } -}; -#else -/** - * This table contains the results of applying both the S-box and P-shuffle. - * It can be regenerated by compiling this file with -DCONFIG_SMALL -DTEST -DGENTABLES - */ -static const uint32_t S_boxes_P_shuffle[8][64] = { - { - 0x00808200, 0x00000000, 0x00008000, 0x00808202, 0x00808002, 0x00008202, 0x00000002, 0x00008000, - 0x00000200, 0x00808200, 0x00808202, 0x00000200, 0x00800202, 0x00808002, 0x00800000, 0x00000002, - 0x00000202, 0x00800200, 0x00800200, 0x00008200, 0x00008200, 0x00808000, 0x00808000, 0x00800202, - 0x00008002, 0x00800002, 0x00800002, 0x00008002, 0x00000000, 0x00000202, 0x00008202, 0x00800000, - 0x00008000, 0x00808202, 0x00000002, 0x00808000, 0x00808200, 0x00800000, 0x00800000, 0x00000200, - 0x00808002, 0x00008000, 0x00008200, 0x00800002, 0x00000200, 0x00000002, 0x00800202, 0x00008202, - 0x00808202, 0x00008002, 0x00808000, 0x00800202, 0x00800002, 0x00000202, 0x00008202, 0x00808200, - 0x00000202, 0x00800200, 0x00800200, 0x00000000, 0x00008002, 0x00008200, 0x00000000, 0x00808002, - }, - { - 0x40084010, 0x40004000, 0x00004000, 0x00084010, 0x00080000, 0x00000010, 0x40080010, 0x40004010, - 0x40000010, 0x40084010, 0x40084000, 0x40000000, 0x40004000, 0x00080000, 0x00000010, 0x40080010, - 0x00084000, 0x00080010, 0x40004010, 0x00000000, 0x40000000, 0x00004000, 0x00084010, 0x40080000, - 0x00080010, 0x40000010, 0x00000000, 0x00084000, 0x00004010, 0x40084000, 0x40080000, 0x00004010, - 0x00000000, 0x00084010, 0x40080010, 0x00080000, 0x40004010, 0x40080000, 0x40084000, 0x00004000, - 0x40080000, 0x40004000, 0x00000010, 0x40084010, 0x00084010, 0x00000010, 0x00004000, 0x40000000, - 0x00004010, 0x40084000, 0x00080000, 0x40000010, 0x00080010, 0x40004010, 0x40000010, 0x00080010, - 0x00084000, 0x00000000, 0x40004000, 0x00004010, 0x40000000, 0x40080010, 0x40084010, 0x00084000, - }, - { - 0x00000104, 0x04010100, 0x00000000, 0x04010004, 0x04000100, 0x00000000, 0x00010104, 0x04000100, - 0x00010004, 0x04000004, 0x04000004, 0x00010000, 0x04010104, 0x00010004, 0x04010000, 0x00000104, - 0x04000000, 0x00000004, 0x04010100, 0x00000100, 0x00010100, 0x04010000, 0x04010004, 0x00010104, - 0x04000104, 0x00010100, 0x00010000, 0x04000104, 0x00000004, 0x04010104, 0x00000100, 0x04000000, - 0x04010100, 0x04000000, 0x00010004, 0x00000104, 0x00010000, 0x04010100, 0x04000100, 0x00000000, - 0x00000100, 0x00010004, 0x04010104, 0x04000100, 0x04000004, 0x00000100, 0x00000000, 0x04010004, - 0x04000104, 0x00010000, 0x04000000, 0x04010104, 0x00000004, 0x00010104, 0x00010100, 0x04000004, - 0x04010000, 0x04000104, 0x00000104, 0x04010000, 0x00010104, 0x00000004, 0x04010004, 0x00010100, - }, - { - 0x80401000, 0x80001040, 0x80001040, 0x00000040, 0x00401040, 0x80400040, 0x80400000, 0x80001000, - 0x00000000, 0x00401000, 0x00401000, 0x80401040, 0x80000040, 0x00000000, 0x00400040, 0x80400000, - 0x80000000, 0x00001000, 0x00400000, 0x80401000, 0x00000040, 0x00400000, 0x80001000, 0x00001040, - 0x80400040, 0x80000000, 0x00001040, 0x00400040, 0x00001000, 0x00401040, 0x80401040, 0x80000040, - 0x00400040, 0x80400000, 0x00401000, 0x80401040, 0x80000040, 0x00000000, 0x00000000, 0x00401000, - 0x00001040, 0x00400040, 0x80400040, 0x80000000, 0x80401000, 0x80001040, 0x80001040, 0x00000040, - 0x80401040, 0x80000040, 0x80000000, 0x00001000, 0x80400000, 0x80001000, 0x00401040, 0x80400040, - 0x80001000, 0x00001040, 0x00400000, 0x80401000, 0x00000040, 0x00400000, 0x00001000, 0x00401040, - }, - { - 0x00000080, 0x01040080, 0x01040000, 0x21000080, 0x00040000, 0x00000080, 0x20000000, 0x01040000, - 0x20040080, 0x00040000, 0x01000080, 0x20040080, 0x21000080, 0x21040000, 0x00040080, 0x20000000, - 0x01000000, 0x20040000, 0x20040000, 0x00000000, 0x20000080, 0x21040080, 0x21040080, 0x01000080, - 0x21040000, 0x20000080, 0x00000000, 0x21000000, 0x01040080, 0x01000000, 0x21000000, 0x00040080, - 0x00040000, 0x21000080, 0x00000080, 0x01000000, 0x20000000, 0x01040000, 0x21000080, 0x20040080, - 0x01000080, 0x20000000, 0x21040000, 0x01040080, 0x20040080, 0x00000080, 0x01000000, 0x21040000, - 0x21040080, 0x00040080, 0x21000000, 0x21040080, 0x01040000, 0x00000000, 0x20040000, 0x21000000, - 0x00040080, 0x01000080, 0x20000080, 0x00040000, 0x00000000, 0x20040000, 0x01040080, 0x20000080, - }, - { - 0x10000008, 0x10200000, 0x00002000, 0x10202008, 0x10200000, 0x00000008, 0x10202008, 0x00200000, - 0x10002000, 0x00202008, 0x00200000, 0x10000008, 0x00200008, 0x10002000, 0x10000000, 0x00002008, - 0x00000000, 0x00200008, 0x10002008, 0x00002000, 0x00202000, 0x10002008, 0x00000008, 0x10200008, - 0x10200008, 0x00000000, 0x00202008, 0x10202000, 0x00002008, 0x00202000, 0x10202000, 0x10000000, - 0x10002000, 0x00000008, 0x10200008, 0x00202000, 0x10202008, 0x00200000, 0x00002008, 0x10000008, - 0x00200000, 0x10002000, 0x10000000, 0x00002008, 0x10000008, 0x10202008, 0x00202000, 0x10200000, - 0x00202008, 0x10202000, 0x00000000, 0x10200008, 0x00000008, 0x00002000, 0x10200000, 0x00202008, - 0x00002000, 0x00200008, 0x10002008, 0x00000000, 0x10202000, 0x10000000, 0x00200008, 0x10002008, - }, - { - 0x00100000, 0x02100001, 0x02000401, 0x00000000, 0x00000400, 0x02000401, 0x00100401, 0x02100400, - 0x02100401, 0x00100000, 0x00000000, 0x02000001, 0x00000001, 0x02000000, 0x02100001, 0x00000401, - 0x02000400, 0x00100401, 0x00100001, 0x02000400, 0x02000001, 0x02100000, 0x02100400, 0x00100001, - 0x02100000, 0x00000400, 0x00000401, 0x02100401, 0x00100400, 0x00000001, 0x02000000, 0x00100400, - 0x02000000, 0x00100400, 0x00100000, 0x02000401, 0x02000401, 0x02100001, 0x02100001, 0x00000001, - 0x00100001, 0x02000000, 0x02000400, 0x00100000, 0x02100400, 0x00000401, 0x00100401, 0x02100400, - 0x00000401, 0x02000001, 0x02100401, 0x02100000, 0x00100400, 0x00000000, 0x00000001, 0x02100401, - 0x00000000, 0x00100401, 0x02100000, 0x00000400, 0x02000001, 0x02000400, 0x00000400, 0x00100001, - }, - { - 0x08000820, 0x00000800, 0x00020000, 0x08020820, 0x08000000, 0x08000820, 0x00000020, 0x08000000, - 0x00020020, 0x08020000, 0x08020820, 0x00020800, 0x08020800, 0x00020820, 0x00000800, 0x00000020, - 0x08020000, 0x08000020, 0x08000800, 0x00000820, 0x00020800, 0x00020020, 0x08020020, 0x08020800, - 0x00000820, 0x00000000, 0x00000000, 0x08020020, 0x08000020, 0x08000800, 0x00020820, 0x00020000, - 0x00020820, 0x00020000, 0x08020800, 0x00000800, 0x00000020, 0x08020020, 0x00000800, 0x00020820, - 0x08000800, 0x00000020, 0x08000020, 0x08020000, 0x08020020, 0x08000000, 0x00020000, 0x08000820, - 0x00000000, 0x08020820, 0x00020020, 0x08000020, 0x08020000, 0x08000800, 0x08000820, 0x00000000, - 0x08020820, 0x00020800, 0x00020800, 0x00000820, 0x00000820, 0x00020020, 0x08000000, 0x08020800, - }, -}; -#endif - -static uint64_t shuffle(uint64_t in, const uint8_t *shuffle, int shuffle_len) { - int i; - uint64_t res = 0; - for (i = 0; i < shuffle_len; i++) - res += res + ((in >> *shuffle++) & 1); - return res; -} - -static uint64_t shuffle_inv(uint64_t in, const uint8_t *shuffle, int shuffle_len) { - int i; - uint64_t res = 0; - shuffle += shuffle_len - 1; - for (i = 0; i < shuffle_len; i++) { - res |= (in & 1) << *shuffle--; - in >>= 1; - } - return res; -} - -static uint32_t f_func(uint32_t r, uint64_t k) { - int i; - uint32_t out = 0; - // rotate to get first part of E-shuffle in the lowest 6 bits - r = (r << 1) | (r >> 31); - // apply S-boxes, those compress the data again from 8 * 6 to 8 * 4 bits - for (i = 7; i >= 0; i--) { - uint8_t tmp = (r ^ k) & 0x3f; -#ifdef CONFIG_SMALL - uint8_t v = S_boxes[i][tmp >> 1]; - if (tmp & 1) v >>= 4; - out = (out >> 4) | (v << 28); -#else - out |= S_boxes_P_shuffle[i][tmp]; -#endif - // get next 6 bits of E-shuffle and round key k into the lowest bits - r = (r >> 4) | (r << 28); - k >>= 6; - } -#ifdef CONFIG_SMALL - out = shuffle(out, P_shuffle, sizeof(P_shuffle)); -#endif - return out; -} - -/** - * \brief rotate the two halves of the expanded 56 bit key each 1 bit left - * - * Note: the specification calls this "shift", so I kept it although - * it is confusing. - */ -static uint64_t key_shift_left(uint64_t CDn) { - uint64_t carries = (CDn >> 27) & 0x10000001; - CDn <<= 1; - CDn &= ~0x10000001; - CDn |= carries; - return CDn; -} - -uint64_t ff_des_encdec(uint64_t in, uint64_t key, int decrypt) { - int i; - uint64_t K[16]; - // discard parity bits from key and shuffle it into C and D parts - uint64_t CDn = shuffle(key, PC1_shuffle, sizeof(PC1_shuffle)); - // generate round keys - for (i = 0; i < 16; i++) { - CDn = key_shift_left(CDn); - if (i > 1 && i != 8 && i != 15) - CDn = key_shift_left(CDn); - K[i] = shuffle(CDn, PC2_shuffle, sizeof(PC2_shuffle)); - } - // used to apply round keys in reverse order for decryption - decrypt = decrypt ? 15 : 0; - // shuffle irrelevant to security but to ease hardware implementations - in = shuffle(in, IP_shuffle, sizeof(IP_shuffle)); - for (i = 0; i < 16; i++) { - uint32_t f_res; - f_res = f_func(in, K[decrypt ^ i]); - in = (in << 32) | (in >> 32); - in ^= f_res; - } - in = (in << 32) | (in >> 32); - // reverse shuffle used to ease hardware implementations - in = shuffle_inv(in, IP_shuffle, sizeof(IP_shuffle)); - return in; -} - -#ifdef TEST -#include <stdlib.h> -#include <stdio.h> -#include <sys/time.h> -static uint64_t rand64(void) { - uint64_t r = rand(); - r = (r << 32) | rand(); - return r; -} - -int main(void) { - int i, j; - struct timeval tv; - uint64_t key; - uint64_t data; - uint64_t ct; - gettimeofday(&tv, NULL); - srand(tv.tv_sec * 1000 * 1000 + tv.tv_usec); - key = 0x123456789abcdef0ULL; - data = 0xfedcba9876543210ULL; - if (ff_des_encdec(data, key, 0) != 0x4ab65b3d4b061518ULL) { - printf("Test 1 failed\n"); - return 1; - } - for (i = 0; i < 1000000; i++) { - key = rand64(); - data = rand64(); - ct = ff_des_encdec(data, key, 0); - if (ff_des_encdec(ct, key, 1) != data) { - printf("Test 2 failed\n"); - return 1; - } - } -#ifdef GENTABLES - printf("static const uint32_t S_boxes_P_shuffle[8][64] = {\n"); - for (i = 0; i < 8; i++) { - printf(" {"); - for (j = 0; j < 64; j++) { - uint32_t v = S_boxes[i][j >> 1]; - v = j & 1 ? v >> 4 : v & 0xf; - v <<= 28 - 4 * i; - v = shuffle(v, P_shuffle, sizeof(P_shuffle)); - printf((j & 7) == 0 ? "\n " : " "); - printf("0x%08X,", v); - } - printf("\n },\n"); - } - printf("};\n"); -#endif - return 0; -} -#endif |