#ifndef CRYPTOPP_MODEXPPC_H

#define CRYPTOPP_MODEXPPC_H

#include "cryptlib.h"

#include "modarith.h"

#include "integer.h"

#include "algebra.h"

#include "eprecomp.h"

#include "smartptr.h"

#include "pubkey.h"

#if CRYPTOPP_MSC_VERSION

# pragma warning(push)

# pragma warning(disable: 4231 4275)

#endif

NAMESPACE_BEGIN(CryptoPP)

CRYPTOPP_DLL_TEMPLATE_CLASS DL_FixedBasePrecomputationImpl<Integer>;

class ModExpPrecomputation : public DL_GroupPrecomputation<Integer>

{

public:

  virtual ~ModExpPrecomputation() {}

  // DL_GroupPrecomputation

  bool NeedConversions() const {return true;}

  Element ConvertIn(const Element &v) const {return m_mr->ConvertIn(v);}

  virtual Element ConvertOut(const Element &v) const {return m_mr->ConvertOut(v);}

  const AbstractGroup<Element> & GetGroup() const {return m_mr->MultiplicativeGroup();}

  Element BERDecodeElement(BufferedTransformation &bt) const {return Integer(bt);}

  void DEREncodeElement(BufferedTransformation &bt, const Element &v) const {v.DEREncode(bt);}

  // non-inherited

  void SetModulus(const Integer &v) {m_mr.reset(new MontgomeryRepresentation(v));}

  const Integer & GetModulus() const {return m_mr->GetModulus();}

private:

  value_ptr<MontgomeryRepresentation> m_mr;

};

NAMESPACE_END

#if CRYPTOPP_MSC_VERSION

# pragma warning(pop)

#endif

#endif