| | 1 | /* crapto1.h |
| | 2 | |
| | 3 | This program is free software; you can redistribute it and/or |
| | 4 | modify it under the terms of the GNU General Public License |
| | 5 | as published by the Free Software Foundation; either version 2 |
| | 6 | of the License, or (at your option) any later version. |
| | 7 | |
| | 8 | This program is distributed in the hope that it will be useful, |
| | 9 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| | 10 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| | 11 | GNU General Public License for more details. |
| | 12 | |
| | 13 | You should have received a copy of the GNU General Public License |
| | 14 | along with this program; if not, write to the Free Software |
| | 15 | Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, |
| | 16 | MA 02110-1301, US$ |
| | 17 | |
| | 18 | Copyright (C) 2008-2008 bla <blapost@gmail.com> |
| | 19 | */ |
| | 20 | #ifndef CRAPTO1_INCLUDED |
| | 21 | #define CRAPTO1_INCLUDED |
| | 22 | #include <stdint.h> |
| | 23 | #ifdef __cplusplus |
| | 24 | extern "C" { |
| | 25 | #endif |
| | 26 | |
| | 27 | struct Crypto1State {uint32_t odd, even;}; |
| | 28 | struct Crypto1State* crypto1_create(uint64_t); |
| | 29 | void crypto1_destroy(struct Crypto1State*); |
| | 30 | void crypto1_get_lfsr(struct Crypto1State*, uint64_t*); |
| | 31 | uint8_t crypto1_bit(struct Crypto1State*, uint8_t, int); |
| | 32 | uint8_t crypto1_byte(struct Crypto1State*, uint8_t, int); |
| | 33 | uint32_t crypto1_word(struct Crypto1State*, uint32_t, int); |
| | 34 | uint32_t prng_successor(uint32_t x, uint32_t n); |
| | 35 | |
| | 36 | struct Crypto1State* lfsr_recovery32(uint32_t ks2, uint32_t in); |
| | 37 | struct Crypto1State* lfsr_recovery64(uint32_t ks2, uint32_t ks3); |
| | 38 | uint32_t *lfsr_prefix_ks(uint8_t ks[8], int isodd); |
| | 39 | struct Crypto1State* |
| | 40 | lfsr_common_prefix(uint32_t pfx, uint32_t rr, uint8_t ks[8], uint8_t par[8][8]); |
| | 41 | |
| | 42 | uint8_t lfsr_rollback_bit(struct Crypto1State* s, uint32_t in, int fb); |
| | 43 | uint8_t lfsr_rollback_byte(struct Crypto1State* s, uint32_t in, int fb); |
| | 44 | uint32_t lfsr_rollback_word(struct Crypto1State* s, uint32_t in, int fb); |
| | 45 | int nonce_distance(uint32_t from, uint32_t to); |
| | 46 | #define FOREACH_VALID_NONCE(N, FILTER, FSIZE)\ |
| | 47 | uint32_t __n = 0,__M = 0, N = 0;\ |
| | 48 | int __i;\ |
| | 49 | for(; __n < 1 << 16; N = prng_successor(__M = ++__n, 16))\ |
| | 50 | for(__i = FSIZE - 1; __i >= 0; __i--)\ |
| | 51 | if(BIT(FILTER, __i) ^ parity(__M & 0xFF01))\ |
| | 52 | break;\ |
| | 53 | else if(__i)\ |
| | 54 | __M = prng_successor(__M, (__i == 7) ? 48 : 8);\ |
| | 55 | else |
| | 56 | |
| | 57 | #define LF_POLY_ODD (0x29CE5C) |
| | 58 | #define LF_POLY_EVEN (0x870804) |
| | 59 | #define BIT(x, n) ((x) >> (n) & 1) |
| | 60 | #define BEBIT(x, n) BIT(x, (n) ^ 24) |
| | 61 | static inline int parity(uint32_t x) |
| | 62 | { |
| | 63 | #if !defined __i386__ || !defined __GNUC__ |
| | 64 | x ^= x >> 16; |
| | 65 | x ^= x >> 8; |
| | 66 | x ^= x >> 4; |
| | 67 | return BIT(0x6996, x & 0xf); |
| | 68 | #else |
| | 69 | asm( "movl %1, %%eax\n" |
| | 70 | "mov %%ax, %%cx\n" |
| | 71 | "shrl $0x10, %%eax\n" |
| | 72 | "xor %%ax, %%cx\n" |
| | 73 | "xor %%ch, %%cl\n" |
| | 74 | "setpo %%al\n" |
| | 75 | "movzx %%al, %0\n": "=r"(x) : "r"(x): "eax","ecx"); |
| | 76 | return x; |
| | 77 | #endif |
| | 78 | } |
| | 79 | static inline int filter(uint32_t const x) |
| | 80 | { |
| | 81 | uint32_t f; |
| | 82 | |
| | 83 | f = 0xf22c0 >> (x & 0xf) & 16; |
| | 84 | f |= 0x6c9c0 >> (x >> 4 & 0xf) & 8; |
| | 85 | f |= 0x3c8b0 >> (x >> 8 & 0xf) & 4; |
| | 86 | f |= 0x1e458 >> (x >> 12 & 0xf) & 2; |
| | 87 | f |= 0x0d938 >> (x >> 16 & 0xf) & 1; |
| | 88 | return BIT(0xEC57E80A, f); |
| | 89 | } |
| | 90 | #ifdef __cplusplus |
| | 91 | } |
| | 92 | #endif |
| | 93 | #endif |
projects / proxmark3-svn / blame_incremental