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/* Utilities used by mobile */
/* (C) 2018 by Holger Hans Peter Freyther
*
* All Rights Reserved
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
*/
#include <osmocom/bb/common/utils.h>
#include <osmocom/gsm/gsm_utils.h>
#include <stdlib.h>
#include <stdint.h>
/**
* A secure replacement for random(3).
*
* \return a secure random number using osmo_get_rand_id between
* 0 and RAND_MAX.
*/
int layer23_random(void)
{
unsigned int r;
if (osmo_get_rand_id((uint8_t *) &r, sizeof(r)) != 0)
return random();
r &= ~(1U << 31);
r %= RAND_MAX;
return (int) r;
}
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