rng.c File Reference

#include "rng.h"
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <stdio.h>

Include dependency graph for rng.c:

Go to the source code of this file.

Functions
void	randombytes (void *x, size_t l)

Function Documentation

randombytes()

void randombytes	(	void *	x,
		size_t	l )

Definition at line 13 of file rng.c.

{
    static __thread int fd = -1;
    ssize_t n;
    if (fd < 0 && 0 > (fd = open("/dev/urandom", O_RDONLY)))
        exit(1);
    for (size_t i = 0; i < l; i += n)
        if (0 >= (n = read(fd, (char *) x + i, l - i)))
            exit(2);
#ifdef ENABLE_CT_TESTING
    VALGRIND_MAKE_MEM_UNDEFINED(x, l);
#endif
}

References i.