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 CRYPTOPP_DLL_TEMPLATE_CLASS DL_FixedBasePrecomputationImpl<Integer>; 00012 00013 class ModExpPrecomputation : public DL_GroupPrecomputation<Integer> 00014 { 00015 public: 00016 // DL_GroupPrecomputation 00017 bool NeedConversions() const {return true;} 00018 Element ConvertIn(const Element &v) const {return m_mr->ConvertIn(v);} 00019 virtual Element ConvertOut(const Element &v) const {return m_mr->ConvertOut(v);} 00020 const AbstractGroup<Element> & GetGroup() const {return m_mr->MultiplicativeGroup();} 00021 Element BERDecodeElement(BufferedTransformation &bt) const {return Integer(bt);} 00022 void DEREncodeElement(BufferedTransformation &bt, const Element &v) const {v.DEREncode(bt);} 00023 00024 // non-inherited 00025 void SetModulus(const Integer &v) {m_mr.reset(new MontgomeryRepresentation(v));} 00026 const Integer & GetModulus() const {return m_mr->GetModulus();} 00027 00028 private: 00029 value_ptr<MontgomeryRepresentation> m_mr; 00030 }; 00031 00032 NAMESPACE_END 00033 00034 #endif