blob: 345ee3ca9742ca1e5894e09aeec700b3fdc26706 (
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
|
/*
* ANSI X9.31 RNG
* (C) 1999-2009 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#ifndef BOTAN_ANSI_X931_RNG_H__
#define BOTAN_ANSI_X931_RNG_H__
#include <botan/rng.h>
#include <botan/block_cipher.h>
namespace Botan {
/**
* ANSI X9.31 RNG
*/
class BOTAN_DLL ANSI_X931_RNG : public RandomNumberGenerator
{
public:
void randomize(byte[], u32bit);
bool is_seeded() const;
void clear();
std::string name() const;
void reseed(u32bit poll_bits);
void add_entropy_source(EntropySource*);
void add_entropy(const byte[], u32bit);
/**
* @param cipher the block cipher to use in this PRNG
* @param rng the underlying PRNG for generating inputs
* (eg, an HMAC_RNG)
*/
ANSI_X931_RNG(BlockCipher* cipher,
RandomNumberGenerator* rng);
~ANSI_X931_RNG();
private:
void rekey();
void update_buffer();
BlockCipher* cipher;
RandomNumberGenerator* prng;
SecureVector<byte> V, R;
u32bit position;
};
}
#endif
|
