blob: f456b978d99c9da4832730122777c8347d10e954 [file] [log] [blame]
/*
* Copyright (c) 2024 Nordic Semiconductor ASA
*
* SPDX-License-Identifier: Apache-2.0
*
* Bottom/Linux side of the pseudo-random entropy generator for
* ARCH_POSIX architecture
*/
#undef _XOPEN_SOURCE
#define _XOPEN_SOURCE 700
#include <stdbool.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/random.h>
#include "nsi_tracing.h"
void entropy_native_seed(unsigned int seed, bool seed_random)
{
if (seed_random == false) {
srandom(seed);
} else {
unsigned int buf;
int err = getrandom(&buf, sizeof(buf), 0);
if (err != sizeof(buf)) {
nsi_print_error_and_exit("Could not get random number (%i, %s)\n",
err, strerror(errno));
}
srandom(buf);
/* Let's print the seed so users can still reproduce the run if they need to */
nsi_print_trace("Random generator seeded with 0x%X\n", buf);
}
}