4 * This file is part of BeRTOS.
6 * Bertos is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 * As a special exception, you may use this file as part of a free software
21 * library without restriction. Specifically, if other files instantiate
22 * templates or use macros or inline functions from this file, or you compile
23 * this file and link it with other files to produce an executable, this
24 * file does not by itself cause the resulting executable to be covered by
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29 * Copyright 2007 Develer S.r.l. (http://www.develer.com/)
33 * \brief MD2 Message-Digest algorithm.
35 * The algorithm takes as input a message of arbitrary length and produces
36 * as output a 128-bit message digest of the input.
37 * It is conjectured that it is computationally infeasible to produce
38 * two messages having the same message digest, or to produce any
39 * message having a given prespecified target message digest.
43 * \author Daniele Basile <asterix@develer.com>
45 * $WIZ$ module_name = "md2"
46 * $WIZ$ module_configuration = "bertos/cfg/cfg_md2.h"
52 #include "cfg/cfg_md2.h"
53 #include <cfg/compiler.h>
55 #define NUM_COMPUTE_ROUNDS 18 ///< Number of compute rounds.
56 #define COMPUTE_ARRAY_LEN CONFIG_MD2_BLOCK_LEN * 3 ///< Lenght of compute array.
57 #define MD2_DIGEST_LEN CONFIG_MD2_BLOCK_LEN
59 * Context for MD2 computation.
61 typedef struct Md2Context
63 uint8_t buffer[CONFIG_MD2_BLOCK_LEN]; ///< Input buffer.
64 uint8_t state[CONFIG_MD2_BLOCK_LEN]; ///< Current state buffer.
65 uint8_t checksum[CONFIG_MD2_BLOCK_LEN]; ///< Checksum.
66 size_t counter; ///< Counter of remaining bytes.
70 void md2_init(Md2Context *context);
71 void md2_update(Md2Context *context, const void *block_in, size_t block_len);
72 uint8_t *md2_end(Md2Context *context);
75 #endif /* ALGO_MD2_H */