/* * DL Scheme * (C) 1999-2007 Jack Lloyd * * Distributed under the terms of the Botan license */ #ifndef BOTAN_DL_ALGO_H__ #define BOTAN_DL_ALGO_H__ #include #include #include #include namespace Botan { /** * This class represents discrete logarithm (DL) public keys. */ class BOTAN_DLL DL_Scheme_PublicKey : public virtual Public_Key { public: bool check_key(RandomNumberGenerator& rng, bool) const; AlgorithmIdentifier algorithm_identifier() const; MemoryVector x509_subject_public_key() const; /** * Get the DL domain parameters of this key. * @return the DL domain parameters of this key */ const DL_Group& get_domain() const { return group; } /** * Get the public value y with y = g^x mod p where x is the secret key. */ const BigInt& get_y() const { return y; } /** * Get the prime p of the underlying DL group. * @return the prime p */ const BigInt& group_p() const { return group.get_p(); } /** * Get the prime q of the underlying DL group. * @return the prime q */ const BigInt& group_q() const { return group.get_q(); } /** * Get the generator g of the underlying DL group. * @return the generator g */ const BigInt& group_g() const { return group.get_g(); } /** * Get the underlying groups encoding format. * @return the encoding format */ virtual DL_Group::Format group_format() const = 0; DL_Scheme_PublicKey(const AlgorithmIdentifier& alg_id, const MemoryRegion& key_bits, DL_Group::Format group_format); protected: DL_Scheme_PublicKey() {} BigInt y; DL_Group group; private: virtual void X509_load_hook() {} }; /** * This class represents discrete logarithm (DL) private keys. */ class BOTAN_DLL DL_Scheme_PrivateKey : public virtual DL_Scheme_PublicKey, public virtual Private_Key { public: bool check_key(RandomNumberGenerator& rng, bool) const; /** * Get the secret key x. * @return the secret key */ const BigInt& get_x() const { return x; } MemoryVector pkcs8_private_key() const; DL_Scheme_PrivateKey(const AlgorithmIdentifier& alg_id, const MemoryRegion& key_bits, DL_Group::Format group_format); protected: DL_Scheme_PrivateKey() {} BigInt x; private: virtual void PKCS8_load_hook(RandomNumberGenerator&, bool = false) {} }; } #endif