dh2.h

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// dh2.h - written and placed in the public domain by Wei Dai


#ifndef CRYPTOPP_DH2_H
#define CRYPTOPP_DH2_H

#include "cryptlib.h"

NAMESPACE_BEGIN(CryptoPP)

class DH2 : public AuthenticatedKeyAgreementDomain
{
public:
        virtual ~DH2() {}

        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;

protected:
        SimpleKeyAgreementDomain &d1, &d2;
};

NAMESPACE_END

#endif