78 lines
3.1 KiB
C
78 lines
3.1 KiB
C
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/****************************************************************************
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* include/sys/random.h
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*
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* Copyright (C) 2015-2017 Haltian Ltd. All rights reserved.
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* Authors: Juha Niskanen <juha.niskanen@haltian.com>
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* Jussi Kivilinna <jussi.kivilinna@haltian.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef __INCLUDE_SYS_RANDOM_H
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#define __INCLUDE_SYS_RANDOM_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stddef.h>
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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#ifdef CONFIG_CRYPTO_RANDOM_POOL
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/****************************************************************************
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* Function: getrandom
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*
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* Description:
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* Fill a buffer of arbitrary length with randomness. This is the
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* preferred interface for getting random numbers. The traditional
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* /dev/random approach is susceptible for things like the attacker
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* exhausting file descriptors on purpose.
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*
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* Note that this function cannot fail, other than by asserting.
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*
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* Parameters:
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* bytes - Buffer for returned random bytes
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* nbytes - Number of bytes requested.
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*
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* Returned Value:
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* None
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*
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****************************************************************************/
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void getrandom(FAR void *bytes, size_t nbytes);
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#endif /* CONFIG_CRYPTO_RANDOM_POOL */
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#endif /* __INCLUDE_SYS_RANDOM_H */
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