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Commit	Line	Data
	1	/*****************************************************************************
	2	* This file is part of iClassCipher. It is a reconstructon of the cipher engine
	3	* used in iClass, and RFID techology.
	4	*
	5	* The implementation is based on the work performed by
	6	* Flavio D. Garcia, Gerhard de Koning Gans, Roel Verdult and
	7	* Milosch Meriac in the paper "Dismantling IClass".
	8	*
	9	* Copyright (C) 2014 Martin Holst Swende
	10	*
	11	* This is free software: you can redistribute it and/or modify
	12	* it under the terms of the GNU General Public License version 2 as published
	13	* by the Free Software Foundation.
	14	*
	15	* This file is distributed in the hope that it will be useful,
	16	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	17	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	18	* GNU General Public License for more details.
	19	*
	20	* You should have received a copy of the GNU General Public License
	21	* along with IClassCipher. If not, see <http://www.gnu.org/licenses/>.
	22	****************************************************************************/
	23
	24	#ifndef CIPHER_H
	25	#define CIPHER_H
	26	#include <stdint.h>
	27
	28	/**
	29	* Definition 1 (Cipher state). A cipher state of iClass s is an element of F 40/2
	30	* consisting of the following four components:
	31	* 1. the left register l = (l 0 . . . l 7 ) ∈ F 8/2 ;
	32	* 2. the right register r = (r 0 . . . r 7 ) ∈ F 8/2 ;
	33	* 3. the top register t = (t 0 . . . t 15 ) ∈ F 16/2 .
	34	* 4. the bottom register b = (b 0 . . . b 7 ) ∈ F 8/2 .
	35	**/
	36	typedef struct {
	37	uint8_t l;
	38	uint8_t r;
	39	uint8_t b;
	40	uint16_t t;
	41	} State;
	42
	43	void printarr(char * name, uint8_t* arr, int len);
	44	int calc_iclass_mac(uint8_t cc_nr_p, int length, uint8_t div_key_p, uint8_t *mac);
	45
	46	#endif // CIPHER_H