modexppc.h

#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