summaryrefslogtreecommitdiffstats
path: root/crypto/mem_clr.c
blob: 35bfb74eaebd0a4ecbcc80ad6d69e0e774b3a0c8 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
/*
 * Copyright 2002-2016 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the OpenSSL license (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

#include <string.h>
#include <openssl/crypto.h>

/*
 * Pointer to memset is volatile so that compiler must de-reference
 * the pointer and can't assume that it points to any function in
 * particular (such as memset, which it then might further "optimize")
 */
typedef void *(*memset_t)(void *, int, size_t);

static volatile memset_t memset_func = memset;

void OPENSSL_cleanse(void *ptr, size_t len)
{
    memset_func(ptr, 0, len);
}