/** * \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 Collection of functions to manage entropy pool. * * * \author Daniele Basile <asterix@develer.com> * * $WIZ$ module_name = "randpool" * $WIZ$ module_depends = "timer", "sprintf" * $WIZ$ module_configuration = "bertos/cfg/cfg_randpool.h" */ #ifndef ALGO_RANDPOOL_H #define ALGO_RANDPOOL_H #include "cfg/cfg_randpool.h" #include <cfg/compiler.h> /** * Sturct data of entropy pool. */ typedef struct EntropyPool { size_t entropy; ///< Actual value of entropy (byte). size_t pos_add; ///< Number of byte added in entropy pool. size_t pos_get; ///< Number of byte got in entropy pool. size_t counter; ///< Counter. #if CONFIG_RANDPOOL_TIMER size_t last_counter; ///< Last timer value. #endif uint8_t pool_entropy[CONFIG_SIZE_ENTROPY_POOL]; ///< Entropy pool. } EntropyPool; void randpool_add(EntropyPool *pool, void *data, size_t entropy); void randpool_init(EntropyPool *pool, void *_data, size_t len); size_t randpool_size(EntropyPool *pool); void randpool_get(EntropyPool *pool, void *data, size_t n_byte); uint8_t *randpool_pool(EntropyPool *pool); #endif /* ALGO_RANDPOOL_H */