Move most of the Default_Engine code into engine/def_engine, and the

engine base classes into src/engine

1 files changed, 212 insertions, 0 deletions

diff --git a/src/engine/engine.h b/src/engine/engine.h
new file mode 100644
index 000000000..d7fae2348
--- /dev/null
+++ b/src/engine/engine.h
@@ -0,0 +1,212 @@
+/*************************************************
+* Engine Header File                             *
+* (C) 1999-2007 Jack Lloyd                       *
+*************************************************/
+
+#ifndef BOTAN_ENGINE_H__
+#define BOTAN_ENGINE_H__
+
+#include <botan/block_cipher.h>
+#include <botan/stream_cipher.h>
+#include <botan/hash.h>
+#include <botan/mac.h>
+
+#include <botan/mutex.h>
+#include <botan/pow_mod.h>
+#include <botan/basefilt.h>
+#include <utility>
+#include <map>
+
+#if defined(BOTAN_HAS_IF_PUBLIC_KEY_FAMILY)
+  #include <botan/if_op.h>
+#endif
+
+#if defined(BOTAN_HAS_DSA)
+  #include <botan/dsa_op.h>
+#endif
+
+#if defined(BOTAN_HAS_DIFFIE_HELLMAN)
+  #include <botan/dh_op.h>
+#endif
+
+#if defined(BOTAN_HAS_NYBERG_RUEPPEL)
+  #include <botan/nr_op.h>
+#endif
+
+#if defined(BOTAN_HAS_ELGAMAL)
+  #include <botan/elg_op.h>
+#endif
+
+#if defined(BOTAN_HAS_ECDSA)
+  #include <botan/ecdsa_op.h>
+  #include <botan/ec_dompar.h>
+#endif
+
+#if defined(BOTAN_HAS_ECKAEG)
+  #include <botan/eckaeg_op.h>
+  #include <botan/ec_dompar.h>
+#endif
+
+namespace Botan {
+
+/*************************************************
+* Engine Base Class                              *
+*************************************************/
+class BOTAN_DLL Engine
+   {
+   public:
+      template<typename T>
+      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() {}
+         };
+
+#if defined(BOTAN_HAS_IF_PUBLIC_KEY_FAMILY)
+      virtual IF_Operation* if_op(const BigInt&, const BigInt&, const BigInt&,
+                                  const BigInt&, const BigInt&, const BigInt&,
+                                  const BigInt&, const BigInt&) const
+         { return 0; }
+#endif
+
+#if defined(BOTAN_HAS_DSA)
+      virtual DSA_Operation* dsa_op(const DL_Group&, const BigInt&,
+                                    const BigInt&) const
+         { return 0; }
+#endif
+
+#if defined(BOTAN_HAS_NYBERG_RUEPPEL)
+      virtual NR_Operation* nr_op(const DL_Group&, const BigInt&,
+                                  const BigInt&) const
+         { return 0; }
+#endif
+
+#if defined(BOTAN_HAS_ELGAMAL)
+      virtual ELG_Operation* elg_op(const DL_Group&, const BigInt&,
+                                    const BigInt&) const
+         { return 0; }
+#endif
+
+#if defined(BOTAN_HAS_DIFFIE_HELLMAN)
+      virtual DH_Operation* dh_op(const DL_Group&, const BigInt&) const
+         { return 0; }
+#endif
+
+#if defined(BOTAN_HAS_ECDSA)
+      virtual ECDSA_Operation* ecdsa_op(const EC_Domain_Params&,
+                                        const BigInt&,
+                                        const PointGFp&) const
+         { return 0; }
+#endif
+
+#if defined(BOTAN_HAS_ECKAEG)
+      virtual ECKAEG_Operation* eckaeg_op(const EC_Domain_Params&,
+                                          const BigInt&,
+                                          const PointGFp&) const
+         { return 0; }
+#endif
+
+      virtual Modular_Exponentiator* mod_exp(const BigInt&,
+                                             Power_Mod::Usage_Hints) const
+         { return 0; }
+
+      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<typename T>
+      const T* lookup_algo(const Algorithm_Cache<T>* 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<BlockCipher>* cache_of_bc;
+      Algorithm_Cache<StreamCipher>* cache_of_sc;
+      Algorithm_Cache<HashFunction>* cache_of_hf;
+      Algorithm_Cache<MessageAuthenticationCode>* cache_of_mac;
+      Algorithm_Cache<BlockCipherModePaddingMethod>* cache_of_bc_pad;
+      Algorithm_Cache<S2K>* cache_of_s2k;
+   };
+
+namespace Engine_Core {
+
+/*************************************************
+* Get an operation from an Engine                *
+*************************************************/
+Modular_Exponentiator* mod_exp(const BigInt&, Power_Mod::Usage_Hints);
+
+#if defined(BOTAN_HAS_IF_PUBLIC_KEY_FAMILY)
+IF_Operation* if_op(const BigInt&, const BigInt&, const BigInt&,
+                    const BigInt&, const BigInt&, const BigInt&,
+                    const BigInt&, const BigInt&);
+#endif
+
+#if defined(BOTAN_HAS_DSA)
+DSA_Operation* dsa_op(const DL_Group&, const BigInt&, const BigInt&);
+#endif
+
+#if defined(BOTAN_HAS_NYBERG_RUEPPEL)
+NR_Operation* nr_op(const DL_Group&, const BigInt&, const BigInt&);
+#endif
+
+#if defined(BOTAN_HAS_ELGAMAL)
+ELG_Operation* elg_op(const DL_Group&, const BigInt&, const BigInt&);
+#endif
+
+#if defined(BOTAN_HAS_DIFFIE_HELLMAN)
+DH_Operation* dh_op(const DL_Group&, const BigInt&);
+#endif
+
+#if defined(BOTAN_HAS_ECDSA)
+ECDSA_Operation* ecdsa_op(const EC_Domain_Params& dom_pars,
+                          const BigInt& priv_key,
+                          const PointGFp& pub_key);
+#endif
+
+#if defined(BOTAN_HAS_ECKAEG)
+ECKAEG_Operation* eckaeg_op(const EC_Domain_Params& dom_pars,
+                            const BigInt& priv_key,
+                            const PointGFp& pub_key);
+#endif
+
+}
+
+}
+
+#endif