mirror of
https://github.com/RfidResearchGroup/proxmark3.git
synced 2024-12-31 04:39:49 +08:00
94 lines
3 KiB
C
94 lines
3 KiB
C
/* crapto1.h
|
|
|
|
This program is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public License
|
|
as published by the Free Software Foundation; either version 2
|
|
of the License, or (at your option) any later version.
|
|
|
|
This program 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 General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
|
|
MA 02110-1301, US$
|
|
|
|
Copyright (C) 2008-2008 bla <blapost@gmail.com>
|
|
*/
|
|
#ifndef CRAPTO1_INCLUDED
|
|
#define CRAPTO1_INCLUDED
|
|
#include <stdint.h>
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
struct Crypto1State {uint32_t odd, even;};
|
|
struct Crypto1State* crypto1_create(uint64_t);
|
|
void crypto1_destroy(struct Crypto1State*);
|
|
void crypto1_get_lfsr(struct Crypto1State*, uint64_t*);
|
|
uint8_t crypto1_bit(struct Crypto1State*, uint8_t, int);
|
|
uint8_t crypto1_byte(struct Crypto1State*, uint8_t, int);
|
|
uint32_t crypto1_word(struct Crypto1State*, uint32_t, int);
|
|
uint32_t prng_successor(uint32_t x, uint32_t n);
|
|
|
|
struct Crypto1State* lfsr_recovery32(uint32_t ks2, uint32_t in);
|
|
struct Crypto1State* lfsr_recovery64(uint32_t ks2, uint32_t ks3);
|
|
uint32_t *lfsr_prefix_ks(uint8_t ks[8], int isodd);
|
|
struct Crypto1State*
|
|
lfsr_common_prefix(uint32_t pfx, uint32_t rr, uint8_t ks[8], uint8_t par[8][8]);
|
|
|
|
|
|
void lfsr_rollback_bit(struct Crypto1State* s, uint32_t in, int fb);
|
|
void lfsr_rollback_byte(struct Crypto1State* s, uint32_t in, int fb);
|
|
void lfsr_rollback_word(struct Crypto1State* s, uint32_t in, int fb);
|
|
int nonce_distance(uint32_t from, uint32_t to);
|
|
#define FOREACH_VALID_NONCE(N, FILTER, FSIZE)\
|
|
uint32_t __n = 0,__M = 0, N = 0;\
|
|
int __i;\
|
|
for(; __n < 1 << 16; N = prng_successor(__M = ++__n, 16))\
|
|
for(__i = FSIZE - 1; __i >= 0; __i--)\
|
|
if(BIT(FILTER, __i) ^ parity(__M & 0xFF01))\
|
|
break;\
|
|
else if(__i)\
|
|
__M = prng_successor(__M, (__i == 7) ? 48 : 8);\
|
|
else
|
|
|
|
#define LF_POLY_ODD (0x29CE5C)
|
|
#define LF_POLY_EVEN (0x870804)
|
|
#define BIT(x, n) ((x) >> (n) & 1)
|
|
#define BEBIT(x, n) BIT(x, (n) ^ 24)
|
|
static inline int parity(uint32_t x)
|
|
{
|
|
#if !defined __i386__ || !defined __GNUC__
|
|
x ^= x >> 16;
|
|
x ^= x >> 8;
|
|
x ^= x >> 4;
|
|
return BIT(0x6996, x & 0xf);
|
|
#else
|
|
asm( "movl %1, %%eax\n"
|
|
"mov %%ax, %%cx\n"
|
|
"shrl $0x10, %%eax\n"
|
|
"xor %%ax, %%cx\n"
|
|
"xor %%ch, %%cl\n"
|
|
"setpo %%al\n"
|
|
"movzx %%al, %0\n": "=r"(x) : "r"(x): "eax","ecx");
|
|
return x;
|
|
#endif
|
|
}
|
|
static inline int filter(uint32_t const x)
|
|
{
|
|
uint32_t f;
|
|
|
|
f = 0xf22c0 >> (x & 0xf) & 16;
|
|
f |= 0x6c9c0 >> (x >> 4 & 0xf) & 8;
|
|
f |= 0x3c8b0 >> (x >> 8 & 0xf) & 4;
|
|
f |= 0x1e458 >> (x >> 12 & 0xf) & 2;
|
|
f |= 0x0d938 >> (x >> 16 & 0xf) & 1;
|
|
return BIT(0xEC57E80A, f);
|
|
}
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
#endif
|