Mirror of BoringSSL (grpc依赖)
https://boringssl.googlesource.com/boringssl
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
53 lines
1.9 KiB
53 lines
1.9 KiB
5 years ago
|
/* Copyright (c) 2016, 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>
|
||
|
|
|
||
|
|
#if defined(BORINGSSL_UNSAFE_DETERMINISTIC_MODE)
|
||
|
|
|
||
|
|
#include <string.h>
|
||
|
|
|
||
|
|
#include <openssl/chacha.h>
|
||
|
|
|
||
|
|
#include "../internal.h"
|
||
|
|
#include "../fipsmodule/rand/internal.h"
|
||
|
|
|
||
|
|
|
||
|
|
// g_num_calls is the number of calls to |CRYPTO_sysrand| that have occurred.
|
||
|
|
//
|
||
|
|
// This is intentionally not thread-safe. If the fuzzer mode is ever used in a
|
||
|
|
// multi-threaded program, replace this with a thread-local. (A mutex would not
|
||
|
|
// be deterministic.)
|
||
|
|
static uint64_t g_num_calls = 0;
|
||
|
|
static struct CRYPTO_STATIC_MUTEX g_num_calls_lock = CRYPTO_STATIC_MUTEX_INIT;
|
||
|
|
|
||
|
|
void RAND_reset_for_fuzzing(void) { g_num_calls = 0; }
|
||
|
|
|
||
|
|
void CRYPTO_sysrand(uint8_t *out, size_t requested) {
|
||
|
|
static const uint8_t kZeroKey[32];
|
||
|
|
|
||
|
|
CRYPTO_STATIC_MUTEX_lock_write(&g_num_calls_lock);
|
||
|
|
uint64_t num_calls = g_num_calls++;
|
||
|
|
CRYPTO_STATIC_MUTEX_unlock_write(&g_num_calls_lock);
|
||
|
|
|
||
|
|
uint8_t nonce[12];
|
||
|
|
OPENSSL_memset(nonce, 0, sizeof(nonce));
|
||
|
|
OPENSSL_memcpy(nonce, &num_calls, sizeof(num_calls));
|
||
|
|
|
||
|
|
OPENSSL_memset(out, 0, requested);
|
||
|
|
CRYPTO_chacha_20(out, out, requested, kZeroKey, nonce, 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif // BORINGSSL_UNSAFE_DETERMINISTIC_MODE
|