Contiki-NG
cc2538-sram-seeder.h
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1/*
2 * Copyright (c) 2015, Hasso-Plattner-Institut.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the Institute nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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28 *
29 * This file is part of the Contiki operating system.
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31 */
32
33/**
34 * \addtogroup csprng
35 * @{
36 *
37 * \file
38 * SRAM-based CSPRNG seeder.
39 * \author
40 * Konrad Krentz <konrad.krentz@gmail.com>
41 */
42
43#ifndef CC2538_SRAM_SEEDER_H_
44#define CC2538_SRAM_SEEDER_H_
45
46#include "lib/csprng.h"
47
48/**
49 * \brief This function will feed the CSPRNG with a new seed.
50 *
51 * Its implementation leverages the fact that SRAM cells are partly
52 * random due to manufacturing variations. For randomness extraction,
53 * this function uses the well-known von Neumann extractor. Note that
54 * this function can only be called at start up and only if
55 * LPM_CONF_MAX_PM >= LPM_PM2.
56 */
57void cc2538_sram_seeder_seed(void);
58
59#endif /* CC2538_SRAM_SEEDER_H_ */
60
61/** @} */
csprng.h
An OFB-AES-128-based CSPRNG.
cc2538_sram_seeder_seed
void cc2538_sram_seeder_seed(void)
This function will feed the CSPRNG with a new seed.
Definition: cc2538-sram-seeder.c:66