/************************************************* * Diffie-Hellman Header File * * (C) 1999-2007 Jack Lloyd * *************************************************/ #ifndef BOTAN_DIFFIE_HELLMAN_H__ #define BOTAN_DIFFIE_HELLMAN_H__ #include <botan/dl_algo.h> #include <botan/dh_core.h> namespace Botan { /** * This class represents Diffie-Hellman public keys. */ class BOTAN_DLL DH_PublicKey : public virtual DL_Scheme_PublicKey { public: std::string algo_name() const { return "DH"; } MemoryVector<byte> public_value() const; u32bit max_input_bits() const; DL_Group::Format group_format() const { return DL_Group::ANSI_X9_42; } /** * Construct an uninitialized key. Use this constructor if you wish * to decode an encoded key into the new instance. */ DH_PublicKey() {} /** * Construct a public key with the specified parameters. * @param grp the DL group to use in the key * @param y the public value y */ DH_PublicKey(const DL_Group& grp, const BigInt& y); private: void X509_load_hook(); }; /** * This class represents Diffie-Hellman private keys. */ class BOTAN_DLL DH_PrivateKey : public DH_PublicKey, public PK_Key_Agreement_Key, public virtual DL_Scheme_PrivateKey { public: SecureVector<byte> derive_key(const byte other[], u32bit length) const; SecureVector<byte> derive_key(const DH_PublicKey& other) const; SecureVector<byte> derive_key(const BigInt& other) const; MemoryVector<byte> public_value() const; /** * Construct an uninitialized key. Use this constructor if you wish * to decode an encoded key into the new instance. */ DH_PrivateKey() {} /** * Construct a private key with predetermined value. * @param rng random number generator to use * @param grp the group to be used in the key * @param x the key's secret value (or if zero, generate a new key) */ DH_PrivateKey(RandomNumberGenerator& rng, const DL_Group& grp, const BigInt& x = 0); private: void PKCS8_load_hook(RandomNumberGenerator& rng, bool = false); DH_Core core; }; } #endif