1/*
2 * Copyright 2002-2016 The OpenSSL Project Authors. All Rights Reserved.
3 *
4 * Licensed under the Apache License 2.0 (the "License").  You may not use
5 * this file except in compliance with the License.  You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
8 */
9
10#include <string.h>
11#include <openssl/crypto.h>
12
13/*
14 * Pointer to memset is volatile so that compiler must de-reference
15 * the pointer and can't assume that it points to any function in
16 * particular (such as memset, which it then might further "optimize")
17 */
18typedef void *(*memset_t)(void *, int, size_t);
19
20static volatile memset_t memset_func = memset;
21
22void OPENSSL_cleanse(void *ptr, size_t len)
23{
24    memset_func(ptr, 0, len);
25}
26