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/*************************************************
* Buffered EntropySource Header File *
* (C) 1999-2007 Jack Lloyd *
*************************************************/
#ifndef BOTAN_BUFFERED_ES_H__
#define BOTAN_BUFFERED_ES_H__
#include <botan/rng.h>
#include <botan/secmem.h>
namespace Botan {
/*************************************************
* Buffered EntropySource *
*************************************************/
class BOTAN_DLL Buffered_EntropySource : public EntropySource
{
public:
u32bit slow_poll(byte[], u32bit);
u32bit fast_poll(byte[], u32bit);
protected:
Buffered_EntropySource();
u32bit copy_out(byte[], u32bit, u32bit);
void add_bytes(const void*, u32bit);
void add_bytes(u64bit);
virtual void do_slow_poll() = 0;
virtual void do_fast_poll();
private:
SecureVector<byte> buffer;
u32bit write_pos, read_pos;
bool done_slow_poll;
};
}
#endif
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