| /* 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; |
| } |