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// dh2.h - written and placed in the public domain by Wei Dai
//! \file
//! \headerfile dh2.h
//! \brief Classes for Diffie-Hellman authenticated key exchange
#ifndef CRYPTOPP_DH2_H
#define CRYPTOPP_DH2_H
#include "cryptlib.h"
NAMESPACE_BEGIN(CryptoPP)
/// <a href="http://www.weidai.com/scan-mirror/ka.html#DH2">Unified Diffie-Hellman</a>
class DH2 : public AuthenticatedKeyAgreementDomain{public: DH2(SimpleKeyAgreementDomain &domain) : d1(domain), d2(domain) {} DH2(SimpleKeyAgreementDomain &staticDomain, SimpleKeyAgreementDomain &ephemeralDomain) : d1(staticDomain), d2(ephemeralDomain) {}
CryptoParameters & AccessCryptoParameters() {return d1.AccessCryptoParameters();}
unsigned int AgreedValueLength() const {return d1.AgreedValueLength() + d2.AgreedValueLength();}
unsigned int StaticPrivateKeyLength() const {return d1.PrivateKeyLength();} unsigned int StaticPublicKeyLength() const {return d1.PublicKeyLength();} void GenerateStaticPrivateKey(RandomNumberGenerator &rng, byte *privateKey) const {d1.GeneratePrivateKey(rng, privateKey);} void GenerateStaticPublicKey(RandomNumberGenerator &rng, const byte *privateKey, byte *publicKey) const {d1.GeneratePublicKey(rng, privateKey, publicKey);} void GenerateStaticKeyPair(RandomNumberGenerator &rng, byte *privateKey, byte *publicKey) const {d1.GenerateKeyPair(rng, privateKey, publicKey);}
unsigned int EphemeralPrivateKeyLength() const {return d2.PrivateKeyLength();} unsigned int EphemeralPublicKeyLength() const {return d2.PublicKeyLength();} void GenerateEphemeralPrivateKey(RandomNumberGenerator &rng, byte *privateKey) const {d2.GeneratePrivateKey(rng, privateKey);} void GenerateEphemeralPublicKey(RandomNumberGenerator &rng, const byte *privateKey, byte *publicKey) const {d2.GeneratePublicKey(rng, privateKey, publicKey);} void GenerateEphemeralKeyPair(RandomNumberGenerator &rng, byte *privateKey, byte *publicKey) const {d2.GenerateKeyPair(rng, privateKey, publicKey);}
bool Agree(byte *agreedValue, const byte *staticPrivateKey, const byte *ephemeralPrivateKey, const byte *staticOtherPublicKey, const byte *ephemeralOtherPublicKey, bool validateStaticOtherPublicKey=true) const;
#ifndef CRYPTOPP_MAINTAIN_BACKWARDS_COMPATIBILITY_562
virtual ~DH2() {}#endif
protected: SimpleKeyAgreementDomain &d1, &d2;};
NAMESPACE_END
#endif
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