mirror of
https://github.com/DrKLO/Telegram.git
synced 2024-12-23 15:00:50 +01:00
48 lines
1.7 KiB
C
48 lines
1.7 KiB
C
/* 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;
|
|
|
|
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];
|
|
|
|
uint8_t nonce[12];
|
|
OPENSSL_memset(nonce, 0, sizeof(nonce));
|
|
OPENSSL_memcpy(nonce, &g_num_calls, sizeof(g_num_calls));
|
|
|
|
OPENSSL_memset(out, 0, requested);
|
|
CRYPTO_chacha_20(out, out, requested, kZeroKey, nonce, 0);
|
|
g_num_calls++;
|
|
}
|
|
|
|
#endif // BORINGSSL_UNSAFE_DETERMINISTIC_MODE
|