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