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1/*****************************************************************************
2 * WARNING
3 *
4 * THIS CODE IS CREATED FOR EXPERIMENTATION AND EDUCATIONAL USE ONLY.
5 *
6 * USAGE OF THIS CODE IN OTHER WAYS MAY INFRINGE UPON THE INTELLECTUAL
7 * PROPERTY OF OTHER PARTIES, SUCH AS INSIDE SECURE AND HID GLOBAL,
8 * AND MAY EXPOSE YOU TO AN INFRINGEMENT ACTION FROM THOSE PARTIES.
9 *
10 * THIS CODE SHOULD NEVER BE USED TO INFRINGE PATENTS OR INTELLECTUAL PROPERTY RIGHTS.
11 *
12 *****************************************************************************
13 *
14 * This file is part of loclass. It is a reconstructon of the cipher engine
15 * used in iClass, and RFID techology.
16 *
17 * The implementation is based on the work performed by
18 * Flavio D. Garcia, Gerhard de Koning Gans, Roel Verdult and
19 * Milosch Meriac in the paper "Dismantling IClass".
20 *
21 * Copyright (C) 2014 Martin Holst Swende
22 *
23 * This is free software: you can redistribute it and/or modify
24 * it under the terms of the GNU General Public License version 2 as published
25 * by the Free Software Foundation, or, at your option, any later version.
26 *
27 * This file is distributed in the hope that it will be useful,
28 * but WITHOUT ANY WARRANTY; without even the implied warranty of
29 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
30 * GNU General Public License for more details.
31 *
32 * You should have received a copy of the GNU General Public License
33 * along with loclass. If not, see <http://www.gnu.org/licenses/>.
34 *
35 *
36 ****************************************************************************/
37
38
39#ifndef CIPHERUTILS_H
40#define CIPHERUTILS_H
41#include <stdint.h>
42#include <stdbool.h>
43#include <stdlib.h>
44
45typedef struct {
46 uint8_t * buffer;
47 uint8_t numbits;
48 uint8_t position;
49} BitstreamIn;
50
51typedef struct {
52 uint8_t * buffer;
53 uint8_t numbits;
54 uint8_t position;
55}BitstreamOut;
56
57bool headBit( BitstreamIn *stream);
58bool tailBit( BitstreamIn *stream);
59void pushBit( BitstreamOut *stream, bool bit);
60int bitsLeft( BitstreamIn *stream);
61#ifndef ON_DEVICE
62int testCipherUtils(void);
63int testMAC();
64#endif
65void push6bits( BitstreamOut* stream, uint8_t bits);
66void EncryptDES(bool key[56], bool outBlk[64], bool inBlk[64], int verbose) ;
67void x_num_to_bytes(uint64_t n, size_t len, uint8_t* dest);
68uint64_t x_bytes_to_num(uint8_t* src, size_t len);
69uint8_t reversebytes(uint8_t b);
70void reverse_arraybytes(uint8_t* arr, size_t len);
71void reverse_arraycopy(uint8_t* arr, uint8_t* dest, size_t len);
72void printarr(char * name, uint8_t* arr, int len);
73void printvar(char * name, uint8_t* arr, int len);
74void printarr_human_readable(char * title, uint8_t* arr, int len);
75#endif // CIPHERUTILS_H
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