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
|
/*
* Copyright (c) 1996, David Mazieres <dm@uun.org>
* Copyright (c) 2008, Damien Miller <djm@openbsd.org>
*
* Permission to use, copy, modify, and 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 "wtf/CryptographicallyRandomNumber.h"
#include "base/rand_util.h"
#include <string.h>
namespace WTF {
static bool s_shouldUseAlwaysZeroRandomSourceForTesting = false;
void setAlwaysZeroRandomSourceForTesting() {
s_shouldUseAlwaysZeroRandomSourceForTesting = true;
}
uint32_t cryptographicallyRandomNumber() {
uint32_t result;
cryptographicallyRandomValues(&result, sizeof(result));
return result;
}
void cryptographicallyRandomValues(void* buffer, size_t length) {
if (s_shouldUseAlwaysZeroRandomSourceForTesting) {
memset(buffer, '\0', length);
return;
}
// This should really be crypto::RandBytes(), but WTF can't depend on crypto.
// The implementation of crypto::RandBytes() is just calling
// base::RandBytes(), so both are actually same.
base::RandBytes(buffer, length);
}
} // namespace WTF
|
