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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 #ifndef IKEYS_H
39 #define IKEYS_H
40
41
42 /**
43 * @brief
44 *Definition 11. Let the function hash0 : F 82 × F 82 × (F 62 ) 8 → (F 82 ) 8 be defined as
45 * hash0(x, y, z [0] . . . z [7] ) = k [0] . . . k [7] where
46 * z'[i] = (z[i] mod (63-i)) + i i = 0...3
47 * z'[i+4] = (z[i+4] mod (64-i)) + i i = 0...3
48 * ẑ = check(z');
49 * @param c
50 * @param k this is where the diversified key is put (should be 8 bytes)
51 * @return
52 */
53 void hash0(uint64_t c, uint8_t k[8]);
54 int doKeyTests(uint8_t debuglevel);
55 /**
56 * @brief Performs Elite-class key diversification
57 * @param csn
58 * @param key
59 * @param div_key
60 */
61
62 void diversifyKey(uint8_t csn[8], uint8_t key[8], uint8_t div_key[8]);
63 /**
64 * @brief Permutes a key from standard NIST format to Iclass specific format
65 * @param key
66 * @param dest
67 */
68
69 #endif // IKEYS_H
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