00001 #ifndef CRYPTOPP_MODEXPPC_H
00002 #define CRYPTOPP_MODEXPPC_H
00003
00004 #include "modarith.h"
00005 #include "eprecomp.h"
00006 #include "smartptr.h"
00007 #include "pubkey.h"
00008
00009 NAMESPACE_BEGIN(CryptoPP)
00010
00011 #ifndef SKIP_EXPLICIT_INSTANTIATION
00012 CRYPTOPP_DLL_TEMPLATE_CLASS DL_FixedBasePrecomputationImpl<Integer>;
00013 #endif // SKIP_EXPLICIT_INSTANTIATION
00014
00015 class ModExpPrecomputation : public DL_GroupPrecomputation<Integer>
00016 {
00017 public:
00018
00019 bool NeedConversions() const {return true;}
00020 Element ConvertIn(const Element &v) const {return m_mr->ConvertIn(v);}
00021 virtual Element ConvertOut(const Element &v) const {return m_mr->ConvertOut(v);}
00022 const AbstractGroup<Element> & GetGroup() const {return m_mr->MultiplicativeGroup();}
00023 Element BERDecodeElement(BufferedTransformation &bt) const {return Integer(bt);}
00024 void DEREncodeElement(BufferedTransformation &bt, const Element &v) const {v.DEREncode(bt);}
00025
00026
00027 void SetModulus(const Integer &v) {m_mr.reset(new MontgomeryRepresentation(v));}
00028 const Integer & GetModulus() const {return m_mr->GetModulus();}
00029
00030 private:
00031 value_ptr<MontgomeryRepresentation> m_mr;
00032 };
00033
00034 NAMESPACE_END
00035
00036 #endif