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/*************************************************
* Randpool Header File *
* (C) 1999-2008 Jack Lloyd *
*************************************************/
#ifndef BOTAN_RANDPOOL_H__
#define BOTAN_RANDPOOL_H__
#include <botan/rng.h>
#include <botan/base.h>
#include <vector>
namespace Botan {
/*************************************************
* Randpool *
*************************************************/
class BOTAN_DLL Randpool : public RandomNumberGenerator
{
public:
void randomize(byte[], u32bit);
bool is_seeded() const;
void clear() throw();
std::string name() const;
void reseed();
void add_entropy_source(EntropySource*);
void add_entropy(const byte[], u32bit);
Randpool(BlockCipher*, MessageAuthenticationCode*,
u32bit pool_blocks = 32,
u32bit iterations_before_reseed = 128);
~Randpool();
private:
void update_buffer();
void mix_pool();
u32bit ITERATIONS_BEFORE_RESEED, POOL_BLOCKS;
BlockCipher* cipher;
MessageAuthenticationCode* mac;
std::vector<EntropySource*> entropy_sources;
SecureVector<byte> pool, buffer, counter;
u32bit entropy;
};
}
#endif
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