randpool.h

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// randpool.h - written and placed in the public domain by Wei Dai


#ifndef CRYPTOPP_RANDPOOL_H
#define CRYPTOPP_RANDPOOL_H

#include "cryptlib.h"
#include "filters.h"
#include "secblock.h"
#include "smartptr.h"
#include "aes.h"

NAMESPACE_BEGIN(CryptoPP)

class CRYPTOPP_DLL RandomPool : public RandomNumberGenerator, public NotCopyable
{
public:
        RandomPool();

        bool CanIncorporateEntropy() const {return true;}
        void IncorporateEntropy(const byte *input, size_t length);
        void GenerateIntoBufferedTransformation(BufferedTransformation &target, const std::string &channel, lword size);

        // for backwards compatibility. use RandomNumberSource, RandomNumberStore, and RandomNumberSink for other BufferTransformation functionality
        void Put(const byte *input, size_t length) {IncorporateEntropy(input, length);}

private:
        FixedSizeAlignedSecBlock<byte, 16, true> m_seed;
        FixedSizeAlignedSecBlock<byte, 32> m_key;
        member_ptr<BlockCipher> m_pCipher;
        bool m_keySet;
};

NAMESPACE_END

#endif