]> cvs.zerfleddert.de Git - proxmark3-svn/blame - client/nonce2key/crapto1.h
FIX: Forget that the prng was 0x8000 length and not 0xFFFF. Sorry. Also returned...
[proxmark3-svn] / client / nonce2key / crapto1.h
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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
a0f33b66 18 Copyright (C) 2008-2014 bla <blapost@gmail.com>
f89c7050 19*/
a0f33b66 20#ifndef CRAPTO1_H__
21#define CRAPTO1_H__
c827ffb0 22
f89c7050 23#include <stdint.h>
089d061f 24#include "bucketsort.h"
c827ffb0 25
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26#ifdef __cplusplus
27extern "C" {
28#endif
29
30struct Crypto1State {uint32_t odd, even;};
31struct Crypto1State* crypto1_create(uint64_t);
32void crypto1_destroy(struct Crypto1State*);
33void crypto1_get_lfsr(struct Crypto1State*, uint64_t*);
34uint8_t crypto1_bit(struct Crypto1State*, uint8_t, int);
35uint8_t crypto1_byte(struct Crypto1State*, uint8_t, int);
36uint32_t crypto1_word(struct Crypto1State*, uint32_t, int);
37uint32_t prng_successor(uint32_t x, uint32_t n);
38
39struct Crypto1State* lfsr_recovery32(uint32_t ks2, uint32_t in);
40struct Crypto1State* lfsr_recovery64(uint32_t ks2, uint32_t ks3);
41uint32_t *lfsr_prefix_ks(uint8_t ks[8], int isodd);
a0f33b66 42struct Crypto1State* lfsr_common_prefix(uint32_t pfx, uint32_t rr, uint8_t ks[8], uint8_t par[8][8]);
f89c7050 43
cd91e41c 44// douvan's no-parity function
45struct Crypto1State* lfsr_common_prefix_ex(uint32_t pfx, uint8_t ks[8]);
46
47
a0f33b66 48uint8_t lfsr_rollback_bit(struct Crypto1State* s, uint32_t in, int fb);
49uint8_t lfsr_rollback_byte(struct Crypto1State* s, uint32_t in, int fb);
50uint32_t lfsr_rollback_word(struct Crypto1State* s, uint32_t in, int fb);
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51int nonce_distance(uint32_t from, uint32_t to);
52#define SWAPENDIAN(x)\
53 (x = (x >> 8 & 0xff00ff) | (x & 0xff00ff) << 8, x = x >> 16 | x << 16)
a0f33b66 54
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55#define FOREACH_VALID_NONCE(N, FILTER, FSIZE)\
56 uint32_t __n = 0,__M = 0, N = 0;\
57 int __i;\
58 for(; __n < 1 << 16; N = prng_successor(__M = ++__n, 16))\
59 for(__i = FSIZE - 1; __i >= 0; __i--)\
60 if(BIT(FILTER, __i) ^ parity(__M & 0xFF01))\
61 break;\
62 else if(__i)\
63 __M = prng_successor(__M, (__i == 7) ? 48 : 8);\
64 else
65
66#define LF_POLY_ODD (0x29CE5C)
67#define LF_POLY_EVEN (0x870804)
68#define BIT(x, n) ((x) >> (n) & 1)
69#define BEBIT(x, n) BIT(x, (n) ^ 24)
70static inline int parity(uint32_t x)
71{
72#if !defined __i386__ || !defined __GNUC__
73 x ^= x >> 16;
74 x ^= x >> 8;
75 x ^= x >> 4;
76 return BIT(0x6996, x & 0xf);
77#else
8130eba4 78 __asm__( "movl %1, %%eax\n"
a0f33b66 79 "mov %%ax, %%cx\n"
80 "shrl $0x10, %%eax\n"
81 "xor %%ax, %%cx\n"
82 "xor %%ch, %%cl\n"
83 "setpo %%al\n"
84 "movzx %%al, %0\n": "=r"(x) : "r"(x): "eax","ecx");
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85 return x;
86#endif
87}
88static inline int filter(uint32_t const x)
89{
90 uint32_t f;
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91 f = 0xf22c0 >> (x & 0xf) & 16;
92 f |= 0x6c9c0 >> (x >> 4 & 0xf) & 8;
93 f |= 0x3c8b0 >> (x >> 8 & 0xf) & 4;
94 f |= 0x1e458 >> (x >> 12 & 0xf) & 2;
95 f |= 0x0d938 >> (x >> 16 & 0xf) & 1;
96 return BIT(0xEC57E80A, f);
97}
98#ifdef __cplusplus
99}
100#endif
101#endif
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