/************************************************* * Engine Header File * * (C) 1999-2007 Jack Lloyd * *************************************************/ #ifndef BOTAN_ENGINE_H__ #define BOTAN_ENGINE_H__ #include #include #include #include #include #include #include #include namespace Botan { /************************************************* * Engine Base Class * *************************************************/ class BOTAN_DLL Engine { public: template class BOTAN_DLL Algorithm_Cache { public: virtual T* get(const std::string&) const = 0; virtual void add(T* algo, const std::string& = "") const = 0; virtual ~Algorithm_Cache() {} }; virtual IF_Operation* if_op(const BigInt&, const BigInt&, const BigInt&, const BigInt&, const BigInt&, const BigInt&, const BigInt&, const BigInt&) const; virtual DSA_Operation* dsa_op(const DL_Group&, const BigInt&, const BigInt&) const; virtual NR_Operation* nr_op(const DL_Group&, const BigInt&, const BigInt&) const; virtual ELG_Operation* elg_op(const DL_Group&, const BigInt&, const BigInt&) const; virtual DH_Operation* dh_op(const DL_Group&, const BigInt&) const; virtual Modular_Exponentiator* mod_exp(const BigInt&, Power_Mod::Usage_Hints) const; virtual Keyed_Filter* get_cipher(const std::string&, Cipher_Dir); const BlockCipher* block_cipher(const std::string&) const; const StreamCipher* stream_cipher(const std::string&) const; const HashFunction* hash(const std::string&) const; const MessageAuthenticationCode* mac(const std::string&) const; const class S2K* s2k(const std::string&) const; const class BlockCipherModePaddingMethod* bc_pad(const std::string&) const; void add_algorithm(BlockCipher*) const; void add_algorithm(StreamCipher*) const; void add_algorithm(HashFunction*) const; void add_algorithm(MessageAuthenticationCode*) const; void add_algorithm(class S2K*) const; void add_algorithm(class BlockCipherModePaddingMethod*) const; Engine(); virtual ~Engine(); private: virtual BlockCipher* find_block_cipher(const std::string&) const; virtual StreamCipher* find_stream_cipher(const std::string&) const; virtual HashFunction* find_hash(const std::string&) const; virtual MessageAuthenticationCode* find_mac(const std::string&) const; virtual class S2K* find_s2k(const std::string&) const; virtual class BlockCipherModePaddingMethod* find_bc_pad(const std::string&) const; template const T* lookup_algo(const Algorithm_Cache* cache, const std::string& name, const Engine* engine, T* (Engine::*find)(const std::string&) const) const { T* algo = cache->get(name); if(!algo) { algo = (engine->*find)(name); if(algo) cache->add(algo, name); } return algo; } Algorithm_Cache* cache_of_bc; Algorithm_Cache* cache_of_sc; Algorithm_Cache* cache_of_hf; Algorithm_Cache* cache_of_mac; Algorithm_Cache* cache_of_bc_pad; Algorithm_Cache* cache_of_s2k; }; namespace Engine_Core { /************************************************* * Get an operation from an Engine * *************************************************/ Modular_Exponentiator* mod_exp(const BigInt&, Power_Mod::Usage_Hints); IF_Operation* if_op(const BigInt&, const BigInt&, const BigInt&, const BigInt&, const BigInt&, const BigInt&, const BigInt&, const BigInt&); DSA_Operation* dsa_op(const DL_Group&, const BigInt&, const BigInt&); NR_Operation* nr_op(const DL_Group&, const BigInt&, const BigInt&); ELG_Operation* elg_op(const DL_Group&, const BigInt&, const BigInt&); DH_Operation* dh_op(const DL_Group&, const BigInt&); } } #endif