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
25 * the GNU General Public License. This exception does not however
26 * invalidate any other reasons why the executable file might be covered by
27 * the GNU General Public License.
29 * Copyright 2007 Develer S.r.l. (http://www.develer.com/);
33 * \brief API function for to manage entropy pool.
37 * \author Daniele Basile <asterix@develer.com>
40 #ifndef ALGO_RANDPOOL_H
41 #define ALGO_RANDPOOL_H
43 #include "cfg/cfg_randpool.h"
44 #include <cfg/compiler.h>
48 * Sturct data of entropy pool.
50 typedef struct EntropyPool
52 size_t entropy; ///< Actual value of entropy (byte).
53 size_t pos_add; ///< Number of byte idd in entropy pool.
54 size_t pos_get; ///< Number of byte get in entropy pool.
55 size_t counter; ///< Counter.
57 #if CONFIG_RANDPOOL_TIMER
58 size_t last_counter; ///< Last timer value.
61 uint8_t pool_entropy[CONFIG_SIZE_ENTROPY_POOL]; ///< Entropy pool.
66 void randpool_add(EntropyPool *pool, void *data, size_t entropy);
67 void randpool_init(EntropyPool *pool, void *_data, size_t len);
68 size_t randpool_size(EntropyPool *pool);
69 void randpool_get(EntropyPool *pool, void *data, size_t n_byte);
70 uint8_t *randpool_pool(EntropyPool *pool);
72 #endif /* ALGO_RANDPOOL_H */