mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
58 lines
1.8 KiB
C
58 lines
1.8 KiB
C
/*
|
|
* Copyright (c) 2009 Baptiste Coudurier <baptiste.coudurier@gmail.com>
|
|
*
|
|
* This file is part of FFmpeg.
|
|
*
|
|
* FFmpeg is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* FFmpeg 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
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with FFmpeg; if not, write to the Free Software
|
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#ifndef AVUTIL_RANDOM_SEED_H
|
|
#define AVUTIL_RANDOM_SEED_H
|
|
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
/**
|
|
* @addtogroup lavu_crypto
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* Get a seed to use in conjunction with random functions.
|
|
* This function tries to provide a good seed at a best effort bases.
|
|
* Its possible to call this function multiple times if more bits are needed.
|
|
* It can be quite slow, which is why it should only be used as seed for a faster
|
|
* PRNG. The quality of the seed depends on the platform.
|
|
*/
|
|
uint32_t av_get_random_seed(void);
|
|
|
|
/**
|
|
* Generate cryptographically secure random data, i.e. suitable for use as
|
|
* encryption keys and similar.
|
|
*
|
|
* @param buf buffer into which the random data will be written
|
|
* @param len size of buf in bytes
|
|
*
|
|
* @retval 0 success, len bytes of random data was written
|
|
* into buf
|
|
* @retval "a negative AVERROR code" random data could not be generated
|
|
*/
|
|
int av_random_bytes(uint8_t *buf, size_t len);
|
|
|
|
/**
|
|
* @}
|
|
*/
|
|
|
|
#endif /* AVUTIL_RANDOM_SEED_H */
|