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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