71 lines
2.7 KiB
C++
71 lines
2.7 KiB
C++
// dh2.h - originally written and placed in the public domain by Wei Dai
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/// \file dh2.h
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/// \brief Classes for Unified Diffie-Hellman key exchange
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/// \since Crypto++ 3.0
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#ifndef CRYPTOPP_DH2_H
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#define CRYPTOPP_DH2_H
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#include "cryptlib.h"
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NAMESPACE_BEGIN(CryptoPP)
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/// \brief Unified Diffie-Hellman in GF(p)
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/// \details A Diffie-Hellman domain is a set of parameters that must be shared
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/// by two parties in a key agreement protocol, along with the algorithms
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/// for generating key pairs and deriving agreed values.
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/// \sa AuthenticatedKeyAgreementDomain, <a href="http://www.weidai.com/scan-mirror/ka.html#DH2">Unified Diffie-Hellman</a>
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/// \since Crypto++ 3.0
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class DH2 : public AuthenticatedKeyAgreementDomain
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{
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public:
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virtual ~DH2() {}
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/// \brief Construct a DH2
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DH2(SimpleKeyAgreementDomain &domain)
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: d1(domain), d2(domain) {}
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/// \brief Construct a DH2
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DH2(SimpleKeyAgreementDomain &staticDomain, SimpleKeyAgreementDomain &ephemeralDomain)
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: d1(staticDomain), d2(ephemeralDomain) {}
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CryptoParameters & AccessCryptoParameters() {return d1.AccessCryptoParameters();}
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unsigned int AgreedValueLength() const
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{return d1.AgreedValueLength() + d2.AgreedValueLength();}
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unsigned int StaticPrivateKeyLength() const
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{return d1.PrivateKeyLength();}
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unsigned int StaticPublicKeyLength() const
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{return d1.PublicKeyLength();}
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void GenerateStaticPrivateKey(RandomNumberGenerator &rng, byte *privateKey) const
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{d1.GeneratePrivateKey(rng, privateKey);}
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void GenerateStaticPublicKey(RandomNumberGenerator &rng, const byte *privateKey, byte *publicKey) const
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{d1.GeneratePublicKey(rng, privateKey, publicKey);}
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void GenerateStaticKeyPair(RandomNumberGenerator &rng, byte *privateKey, byte *publicKey) const
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{d1.GenerateKeyPair(rng, privateKey, publicKey);}
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unsigned int EphemeralPrivateKeyLength() const
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{return d2.PrivateKeyLength();}
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unsigned int EphemeralPublicKeyLength() const
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{return d2.PublicKeyLength();}
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void GenerateEphemeralPrivateKey(RandomNumberGenerator &rng, byte *privateKey) const
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{d2.GeneratePrivateKey(rng, privateKey);}
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void GenerateEphemeralPublicKey(RandomNumberGenerator &rng, const byte *privateKey, byte *publicKey) const
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{d2.GeneratePublicKey(rng, privateKey, publicKey);}
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void GenerateEphemeralKeyPair(RandomNumberGenerator &rng, byte *privateKey, byte *publicKey) const
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{d2.GenerateKeyPair(rng, privateKey, publicKey);}
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bool Agree(byte *agreedValue,
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const byte *staticPrivateKey, const byte *ephemeralPrivateKey,
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const byte *staticOtherPublicKey, const byte *ephemeralOtherPublicKey,
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bool validateStaticOtherPublicKey=true) const;
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protected:
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SimpleKeyAgreementDomain &d1, &d2;
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};
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NAMESPACE_END
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#endif
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