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xtrcrypt.h

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00001 #ifndef CRYPTOPP_XTRCRYPT_H 00002 #define CRYPTOPP_XTRCRYPT_H 00003 00004 /** \file 00005 "The XTR public key system" by Arjen K. Lenstra and Eric R. Verheul 00006 */ 00007 00008 #include "xtr.h" 00009 00010 NAMESPACE_BEGIN(CryptoPP) 00011 00012 //! XTR-DH with key validation 00013 00014 class XTR_DH : public SimpleKeyAgreementDomain, public CryptoParameters 00015 { 00016 typedef XTR_DH ThisClass; 00017 00018 public: 00019 XTR_DH(const Integer &p, const Integer &q, const GFP2Element &g); 00020 XTR_DH(RandomNumberGenerator &rng, unsigned int pbits, unsigned int qbits); 00021 XTR_DH(BufferedTransformation &domainParams); 00022 00023 void DEREncode(BufferedTransformation &domainParams) const; 00024 00025 bool Validate(RandomNumberGenerator &rng, unsigned int level) const; 00026 bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const; 00027 void AssignFrom(const NameValuePairs &source); 00028 CryptoParameters & AccessCryptoParameters() {return *this;} 00029 unsigned int AgreedValueLength() const {return 2*m_p.ByteCount();} 00030 unsigned int PrivateKeyLength() const {return m_q.ByteCount();} 00031 unsigned int PublicKeyLength() const {return 2*m_p.ByteCount();} 00032 00033 void GeneratePrivateKey(RandomNumberGenerator &rng, byte *privateKey) const; 00034 void GeneratePublicKey(RandomNumberGenerator &rng, const byte *privateKey, byte *publicKey) const; 00035 bool Agree(byte *agreedValue, const byte *privateKey, const byte *otherPublicKey, bool validateOtherPublicKey=true) const; 00036 00037 const Integer &GetModulus() const {return m_p;} 00038 const Integer &GetSubgroupOrder() const {return m_q;} 00039 const GFP2Element &GetSubgroupGenerator() const {return m_g;} 00040 00041 void SetModulus(const Integer &p) {m_p = p;} 00042 void SetSubgroupOrder(const Integer &q) {m_q = q;} 00043 void SetSubgroupGenerator(const GFP2Element &g) {m_g = g;} 00044 00045 private: 00046 unsigned int ExponentBitLength() const; 00047 00048 Integer m_p, m_q; 00049 GFP2Element m_g; 00050 }; 00051 00052 NAMESPACE_END 00053 00054 #endif

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