blob: 00542da99db929731a45476cb407560bf916815c (
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
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
|
/*
* virsecureerase.c: Secure clearing of memory
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*
*/
#include <config.h>
#include <string.h>
#include "virsecureerase.h"
/**
* virSecureErase:
* @ptr: pointer to memory to clear
* @size: size of memory to clear
*
* Clear @size bytes of memory at @ptr.
*
* Note that for now this is implemented using memset which is not secure as
* it can be optimized out.
*
* Also note that there are possible leftover direct uses of memset.
*/
void
virSecureErase(void *ptr,
size_t size)
{
if (!ptr || size == 0)
return;
#ifdef WITH_EXPLICIT_BZERO
explicit_bzero(ptr, size);
#else
memset(ptr, 0, size);
#endif
}
/**
* virSecureEraseString:
* @str: String to securely erase
*/
void
virSecureEraseString(char *str)
{
if (!str)
return;
virSecureErase(str, strlen(str));
}
|
