/************************************************* * ECKAEG Header File * * (C) 2007 Falko Strenzke, FlexSecure GmbH * * Manuel Hartl, FlexSecure GmbH * * (C) 2008 Jack Lloyd * *************************************************/ #ifndef BOTAN_ECKAEG_KEY_H__ #define BOTAN_ECKAEG_KEY_H__ #include #include namespace Botan { /** * This class represents ECKAEG Public Keys. */ class BOTAN_DLL ECKAEG_PublicKey : public virtual EC_PublicKey { public: /** * Default constructor. Use this one if you want to later fill * this object with data from an encoded key. */ ECKAEG_PublicKey() {} /** * Construct a public key from a given public point. * @param dom_par the domain parameters associated with this key * @param public_point the public point defining this key */ ECKAEG_PublicKey(const EC_Domain_Params& dom_par, const PointGFp& public_point); /** * Get this keys algorithm name. * @result this keys algorithm name */ std::string algo_name() const { return "ECKAEG"; } /** * Get the maximum number of bits allowed to be fed to this key. * This is the bitlength of the order of the base point. * * @result the maximum number of input bits */ u32bit max_input_bits() const { if(!mp_dom_pars.get()) throw Invalid_State("ECKAEG_PublicKey::max_input_bits(): domain parameters not set"); return mp_dom_pars->get_order().bits(); } ECKAEG_PublicKey(ECKAEG_PublicKey const& other); ECKAEG_PublicKey const& operator= (ECKAEG_PublicKey const& rhs); /** * Make sure that the public point and domain parameters of this * key are set. * @throw Invalid_State if either of the two data members is not set */ virtual void affirm_init() const; protected: void X509_load_hook(); virtual void set_all_values(const ECKAEG_PublicKey& other); ECKAEG_Core m_eckaeg_core; }; /** * This class represents ECKAEG Private Keys. */ class BOTAN_DLL ECKAEG_PrivateKey : public ECKAEG_PublicKey, public EC_PrivateKey, public PK_Key_Agreement_Key { public: /** * Generate a new private key * @param the domain parameters to used for this key */ ECKAEG_PrivateKey(RandomNumberGenerator& rng, const EC_Domain_Params& dom_pars) { mp_dom_pars = std::auto_ptr(new EC_Domain_Params(dom_pars)); generate_private_key(rng); mp_public_point->check_invariants(); m_eckaeg_core = ECKAEG_Core(*mp_dom_pars, m_private_value, *mp_public_point); } /** * Default constructor. Use this one if you want to later fill this object with data * from an encoded key. */ ECKAEG_PrivateKey() {} ECKAEG_PrivateKey(ECKAEG_PrivateKey const& other); ECKAEG_PrivateKey const& operator=(ECKAEG_PrivateKey const& rhs); MemoryVector public_value() const; void PKCS8_load_hook(bool = false); /** * Derive a shared key with the other partys public key. * @param key the other partys public key * @param key_len the other partys public key */ SecureVector derive_key(const byte key[], u32bit key_len) const; /** * Derive a shared key with the other partys public key. * @param other the other partys public key */ SecureVector derive_key(const ECKAEG_PublicKey& other) const; /** * Make sure that the public key parts of this object are set * (calls EC_PublicKey::affirm_init()) as well as the private key * value. * @throw Invalid_State if the above conditions are not satisfied */ virtual void affirm_init() const; protected: virtual void set_all_values(const ECKAEG_PrivateKey& other); }; } #endif