2015-11-05 06:59:46 +00:00
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#ifndef CRYPTOPP_XTRCRYPT_H
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#define CRYPTOPP_XTRCRYPT_H
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/** \file
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"The XTR public key system" by Arjen K. Lenstra and Eric R. Verheul
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*/
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#include "cryptlib.h"
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#include "xtr.h"
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#include "integer.h"
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NAMESPACE_BEGIN(CryptoPP)
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//! XTR-DH with key validation
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class XTR_DH : public SimpleKeyAgreementDomain, public CryptoParameters
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{
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typedef XTR_DH ThisClass;
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2016-09-10 08:57:48 +00:00
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2015-11-05 06:59:46 +00:00
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public:
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XTR_DH(const Integer &p, const Integer &q, const GFP2Element &g);
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XTR_DH(RandomNumberGenerator &rng, unsigned int pbits, unsigned int qbits);
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XTR_DH(BufferedTransformation &domainParams);
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void DEREncode(BufferedTransformation &domainParams) const;
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bool Validate(RandomNumberGenerator &rng, unsigned int level) const;
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bool GetVoidValue(const char *name, const std::type_info &valueType, void *pValue) const;
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void AssignFrom(const NameValuePairs &source);
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CryptoParameters & AccessCryptoParameters() {return *this;}
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unsigned int AgreedValueLength() const {return 2*m_p.ByteCount();}
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unsigned int PrivateKeyLength() const {return m_q.ByteCount();}
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unsigned int PublicKeyLength() const {return 2*m_p.ByteCount();}
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void GeneratePrivateKey(RandomNumberGenerator &rng, byte *privateKey) const;
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void GeneratePublicKey(RandomNumberGenerator &rng, const byte *privateKey, byte *publicKey) const;
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bool Agree(byte *agreedValue, const byte *privateKey, const byte *otherPublicKey, bool validateOtherPublicKey=true) const;
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const Integer &GetModulus() const {return m_p;}
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const Integer &GetSubgroupOrder() const {return m_q;}
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const GFP2Element &GetSubgroupGenerator() const {return m_g;}
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void SetModulus(const Integer &p) {m_p = p;}
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void SetSubgroupOrder(const Integer &q) {m_q = q;}
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void SetSubgroupGenerator(const GFP2Element &g) {m_g = g;}
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private:
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unsigned int ExponentBitLength() const;
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Integer m_p, m_q;
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GFP2Element m_g;
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};
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NAMESPACE_END
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#endif
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