75 lines
2.7 KiB
C
75 lines
2.7 KiB
C
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/**
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* \file
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* <!--
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* This file is part of BeRTOS.
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*
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* Bertos is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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* As a special exception, you may use this file as part of a free software
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* library without restriction. Specifically, if other files instantiate
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* templates or use macros or inline functions from this file, or you compile
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* this file and link it with other files to produce an executable, this
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* file does not by itself cause the resulting executable to be covered by
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* the GNU General Public License. This exception does not however
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* invalidate any other reasons why the executable file might be covered by
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* the GNU General Public License.
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*
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* Copyright 2007 Develer S.r.l. (http://www.develer.com/)
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*
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* -->
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*
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* \brief MD2 Message-Digest algorithm.
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*
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* The algorithm takes as input a message of arbitrary length and produces
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* as output a 128-bit message digest of the input.
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* It is conjectured that it is computationally infeasible to produce
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* two messages having the same message digest, or to produce any
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* message having a given prespecified target message digest.
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*
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*
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* \author Daniele Basile <asterix@develer.com>
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*
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* $WIZ$ module_name = "md2"
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* $WIZ$ module_configuration = "bertos/cfg/cfg_md2.h"
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*/
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#ifndef ALGO_MD2_H
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#define ALGO_MD2_H
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#include "cfg/cfg_md2.h"
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#include <cfg/compiler.h>
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#define NUM_COMPUTE_ROUNDS 18 ///< Number of compute rounds.
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#define COMPUTE_ARRAY_LEN CONFIG_MD2_BLOCK_LEN * 3 ///< Lenght of compute array.
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#define MD2_DIGEST_LEN CONFIG_MD2_BLOCK_LEN
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/**
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* Context for MD2 computation.
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*/
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typedef struct Md2Context
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{
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uint8_t buffer[CONFIG_MD2_BLOCK_LEN]; ///< Input buffer.
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uint8_t state[CONFIG_MD2_BLOCK_LEN]; ///< Current state buffer.
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uint8_t checksum[CONFIG_MD2_BLOCK_LEN]; ///< Checksum.
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size_t counter; ///< Counter of remaining bytes.
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} Md2Context;
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void md2_init(Md2Context *context);
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void md2_update(Md2Context *context, const void *block_in, size_t block_len);
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uint8_t *md2_end(Md2Context *context);
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bool md2_test(void);
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#endif /* ALGO_MD2_H */
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