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