blob: 1a3977f87119379bbdca30b31bfab1401400d52f [file] [log] [blame]
/* Copyright (c) 2017, Google Inc.
*
* 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. */
#include <openssl/rand.h>
#include <stdlib.h>
#include "../fipsmodule/rand/internal.h"
/* g_buffering_enabled is true if fork-unsafe buffering has been enabled. */
static int g_buffering_enabled = 0;
/* g_lock protects |g_buffering_enabled|. */
static struct CRYPTO_STATIC_MUTEX g_lock = CRYPTO_STATIC_MUTEX_INIT;
void RAND_enable_fork_unsafe_buffering(int fd) {
/* We no longer support setting the file-descriptor with this function. */
if (fd != -1) {
abort();
}
CRYPTO_STATIC_MUTEX_lock_write(&g_lock);
g_buffering_enabled = 1;
CRYPTO_STATIC_MUTEX_unlock_write(&g_lock);
}
int rand_fork_unsafe_buffering_enabled(void) {
CRYPTO_STATIC_MUTEX_lock_read(&g_lock);
const int ret = g_buffering_enabled;
CRYPTO_STATIC_MUTEX_unlock_read(&g_lock);
return ret;
}