diff options
Diffstat (limited to 'external/libevent_files/evutil_rand.c')
| -rw-r--r-- | external/libevent_files/evutil_rand.c | 182 |
1 files changed, 0 insertions, 182 deletions
diff --git a/external/libevent_files/evutil_rand.c b/external/libevent_files/evutil_rand.c deleted file mode 100644 index ed557d27..00000000 --- a/external/libevent_files/evutil_rand.c +++ /dev/null @@ -1,182 +0,0 @@ -/* - * Copyright (c) 2007-2012 Niels Provos and Nick Mathewson - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. The name of the author may not be used to endorse or promote products - * derived from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR - * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES - * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. - * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, - * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY - * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT - * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF - * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - */ - -/* This file has our secure PRNG code. On platforms that have arc4random(), - * we just use that. Otherwise, we include arc4random.c as a bunch of static - * functions, and wrap it lightly. We don't expose the arc4random*() APIs - * because A) they aren't in our namespace, and B) it's not nice to name your - * APIs after their implementations. We keep them in a separate file - * so that other people can rip it out and use it for whatever. - */ - -#include "event2/event-config.h" - -#include <limits.h> - -#include "util-internal.h" -#include "evthread-internal.h" - -#ifdef _EVENT_HAVE_ARC4RANDOM -#include <stdlib.h> -#include <string.h> -int -evutil_secure_rng_set_urandom_device_file(char *fname) -{ - (void) fname; - return -1; -} -int -evutil_secure_rng_init(void) -{ - /* call arc4random() now to force it to self-initialize */ - (void) arc4random(); - return 0; -} -int -evutil_secure_rng_global_setup_locks_(const int enable_locks) -{ - return 0; -} - -static void -ev_arc4random_buf(void *buf, size_t n) -{ -#if defined(_EVENT_HAVE_ARC4RANDOM_BUF) && !defined(__APPLE__) - return arc4random_buf(buf, n); -#else - unsigned char *b = buf; - -#if defined(_EVENT_HAVE_ARC4RANDOM_BUF) - /* OSX 10.7 introducd arc4random_buf, so if you build your program - * there, you'll get surprised when older versions of OSX fail to run. - * To solve this, we can check whether the function pointer is set, - * and fall back otherwise. (OSX does this using some linker - * trickery.) - */ - { - void (*tptr)(void *,size_t) = - (void (*)(void*,size_t))arc4random_buf; - if (tptr != NULL) { - return arc4random_buf(buf, n); - } - } -#endif - /* Make sure that we start out with b at a 4-byte alignment; plenty - * of CPUs care about this for 32-bit access. */ - if (n >= 4 && ((ev_uintptr_t)b) & 3) { - ev_uint32_t u = arc4random(); - int n_bytes = 4 - (((ev_uintptr_t)b) & 3); - memcpy(b, &u, n_bytes); - b += n_bytes; - n -= n_bytes; - } - while (n >= 4) { - *(ev_uint32_t*)b = arc4random(); - b += 4; - n -= 4; - } - if (n) { - ev_uint32_t u = arc4random(); - memcpy(b, &u, n); - } -#endif -} - -#else /* !_EVENT_HAVE_ARC4RANDOM { */ - -#ifdef _EVENT_ssize_t -#define ssize_t _EVENT_SSIZE_t -#endif -#define ARC4RANDOM_EXPORT static -#define _ARC4_LOCK() EVLOCK_LOCK(arc4rand_lock, 0) -#define _ARC4_UNLOCK() EVLOCK_UNLOCK(arc4rand_lock, 0) -#ifndef _EVENT_DISABLE_THREAD_SUPPORT -static void *arc4rand_lock; -#endif - -#define ARC4RANDOM_UINT32 ev_uint32_t -#define ARC4RANDOM_NOSTIR -#define ARC4RANDOM_NORANDOM -#define ARC4RANDOM_NOUNIFORM - -#include "./arc4random.c" - -#ifndef _EVENT_DISABLE_THREAD_SUPPORT -int -evutil_secure_rng_global_setup_locks_(const int enable_locks) -{ - EVTHREAD_SETUP_GLOBAL_LOCK(arc4rand_lock, 0); - return 0; -} -#endif - -int -evutil_secure_rng_set_urandom_device_file(char *fname) -{ -#ifdef TRY_SEED_URANDOM - //_ARC4_LOCK(); - arc4random_urandom_filename = fname; - //_ARC4_UNLOCK(); -#endif - return 0; -} - -int -evutil_secure_rng_init(void) -{ - int val; - - //_ARC4_LOCK(); - if (!arc4_seeded_ok) - arc4_stir(); - val = arc4_seeded_ok ? 0 : -1; - //_ARC4_UNLOCK(); - return val; -} - -static void -ev_arc4random_buf(void *buf, size_t n) -{ - arc4random_buf(buf, n); -} - -#endif /* } !_EVENT_HAVE_ARC4RANDOM */ - -void -evutil_secure_rng_get_bytes(void *buf, size_t n) -{ - ev_arc4random_buf(buf, n); -} - -void -evutil_secure_rng_add_bytes(const char *buf, size_t n) -{ -#if !defined(__BIONIC__) /* bionic and OpenBSD removed this; it's a no-op in their current implementation. */ - arc4random_addrandom((unsigned char*)buf, - n>(size_t)INT_MAX ? INT_MAX : (int)n); -#endif -} - |