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/*************************************************
* ANSI X9.31 RNG Header File *
* (C) 1999-2008 The Botan Project *
*************************************************/
#ifndef BOTAN_ANSI_X931_RNG_H__
#define BOTAN_ANSI_X931_RNG_H__
#include <botan/base.h>
namespace Botan {
/*************************************************
* ANSI X9.31 RNG *
*************************************************/
class ANSI_X931_RNG : public RandomNumberGenerator
{
public:
void randomize(byte[], u32bit) throw(PRNG_Unseeded);
bool is_seeded() const;
void clear() throw();
std::string name() const;
ANSI_X931_RNG(const std::string& = "", RandomNumberGenerator* = 0);
~ANSI_X931_RNG();
private:
void add_randomness(const byte[], u32bit);
void update_buffer();
BlockCipher* cipher;
RandomNumberGenerator* prng;
SecureVector<byte> V, R;
u32bit position;
};
}
#endif
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