randombytes.c File Reference

Portable function for generating random data. More...

#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <stdint.h>
#include <string.h>
#include <unistd.h>
#include <stdlib.h>
#include "config.h"
#include "randombytes.h"
#include "debug.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/time.h>

Data Structures
struct	MOBIRandom

Macros
#define	UNUSED(x)   (void)(x)
#define	NEEDS_INIT
#define	NEEDS_CLOSE

Functions
MOBI_RET	mobi_randombytes (void *buf, const size_t size)
	Fill buffer with random bytes. More...

Detailed Description

Portable function for generating random data.

Copyright (c) 2022 Bartek Fabiszewski http://www.fabiszewski.net

This file is part of libmobi. Licensed under LGPL, either version 3, or any later. See http://www.gnu.org/licenses/

This code is based on libsodium's randombytes_buf function We just extract the single function we need from libsodium and adjust it for our use. Most of the code originates from: https://github.com/jedisct1/libsodium/blob/d250858c7445b7de94e912b529b81defe20d4aaa/src/libsodium/randombytes/sysrandom/randombytes_sysrandom.c Original code uses following license:

ISC License

Copyright (c) 2013-2022 Frank Denis <j at pureftpd dot org>

Permission to use, copy, modify, and/or distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies.

THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

Function Documentation

mobi_randombytes()

MOBI_RET mobi_randombytes	(	void *	buf,
		const size_t	size
	)

Fill buffer with random bytes.

Write n random bytes of high quality to buf.

Parameters

[in,out]	buf	Buffer
[in]	size	Buffer size (up to 256 bytes)

Returns

MOBI_RET status code (on success MOBI_SUCCESS)