Initial checkin1.5.6

1 files changed, 361 insertions, 0 deletions

diff --git a/src/engine.cpp b/src/engine.cpp
new file mode 100644
index 000000000..ded54cda8
--- /dev/null
+++ b/src/engine.cpp
@@ -0,0 +1,361 @@
+/*************************************************
+* Engine Source File                             *
+* (C) 1999-2006 The Botan Project                *
+*************************************************/
+
+#include <botan/engine.h>
+#include <botan/libstate.h>
+#include <botan/eng_def.h>
+
+namespace Botan {
+
+namespace Engine_Core {
+
+/*************************************************
+* Acquire an IF op                               *
+*************************************************/
+IF_Operation* if_op(const BigInt& e, const BigInt& n, const BigInt& d,
+                    const BigInt& p, const BigInt& q, const BigInt& d1,
+                    const BigInt& d2, const BigInt& c)
+   {
+   Library_State::Engine_Iterator i(global_state());
+
+   while(const Engine* engine = i.next())
+      {
+      IF_Operation* op = engine->if_op(e, n, d, p, q, d1, d2, c);
+      if(op)
+         return op;
+      }
+
+   throw Lookup_Error("Engine_Core::if_op: Unable to find a working engine");
+   }
+
+/*************************************************
+* Acquire a DSA op                               *
+*************************************************/
+DSA_Operation* dsa_op(const DL_Group& group, const BigInt& y, const BigInt& x)
+   {
+   Library_State::Engine_Iterator i(global_state());
+
+   while(const Engine* engine = i.next())
+      {
+      DSA_Operation* op = engine->dsa_op(group, y, x);
+      if(op)
+         return op;
+      }
+
+   throw Lookup_Error("Engine_Core::dsa_op: Unable to find a working engine");
+   }
+
+/*************************************************
+* Acquire a NR op                                *
+*************************************************/
+NR_Operation* nr_op(const DL_Group& group, const BigInt& y, const BigInt& x)
+   {
+   Library_State::Engine_Iterator i(global_state());
+
+   while(const Engine* engine = i.next())
+      {
+      NR_Operation* op = engine->nr_op(group, y, x);
+      if(op)
+         return op;
+      }
+
+   throw Lookup_Error("Engine_Core::nr_op: Unable to find a working engine");
+   }
+
+/*************************************************
+* Acquire an ElGamal op                          *
+*************************************************/
+ELG_Operation* elg_op(const DL_Group& group, const BigInt& y, const BigInt& x)
+   {
+   Library_State::Engine_Iterator i(global_state());
+
+   while(const Engine* engine = i.next())
+      {
+      ELG_Operation* op = engine->elg_op(group, y, x);
+      if(op)
+         return op;
+      }
+
+   throw Lookup_Error("Engine_Core::elg_op: Unable to find a working engine");
+   }
+
+/*************************************************
+* Acquire a DH op                                *
+*************************************************/
+DH_Operation* dh_op(const DL_Group& group, const BigInt& x)
+   {
+   Library_State::Engine_Iterator i(global_state());
+
+   while(const Engine* engine = i.next())
+      {
+      DH_Operation* op = engine->dh_op(group, x);
+      if(op)
+         return op;
+      }
+
+   throw Lookup_Error("Engine_Core::dh_op: Unable to find a working engine");
+   }
+
+/*************************************************
+* Acquire a modular exponentiator                *
+*************************************************/
+Modular_Exponentiator* mod_exp(const BigInt& n, Power_Mod::Usage_Hints hints)
+   {
+   Library_State::Engine_Iterator i(global_state());
+
+   while(const Engine* engine = i.next())
+      {
+      Modular_Exponentiator* op = engine->mod_exp(n, hints);
+
+      if(op)
+         return op;
+      }
+
+   throw Lookup_Error("Engine_Core::mod_exp: Unable to find a working engine");
+   }
+
+}
+
+/*************************************************
+* Acquire a block cipher                         *
+*************************************************/
+const BlockCipher* retrieve_block_cipher(const std::string& name)
+   {
+   Library_State::Engine_Iterator i(global_state());
+
+   while(const Engine* engine = i.next())
+      {
+      const BlockCipher* algo = engine->block_cipher(name);
+      if(algo)
+         return algo;
+      }
+
+   return 0;
+   }
+
+/*************************************************
+* Acquire a stream cipher                        *
+*************************************************/
+const StreamCipher* retrieve_stream_cipher(const std::string& name)
+   {
+   Library_State::Engine_Iterator i(global_state());
+
+   while(const Engine* engine = i.next())
+      {
+      const StreamCipher* algo = engine->stream_cipher(name);
+      if(algo)
+         return algo;
+      }
+
+   return 0;
+   }
+
+/*************************************************
+* Acquire a hash function                        *
+*************************************************/
+const HashFunction* retrieve_hash(const std::string& name)
+   {
+   Library_State::Engine_Iterator i(global_state());
+
+   while(const Engine* engine = i.next())
+      {
+      const HashFunction* algo = engine->hash(name);
+      if(algo)
+         return algo;
+      }
+
+   return 0;
+   }
+
+/*************************************************
+* Acquire an authentication code                 *
+*************************************************/
+const MessageAuthenticationCode* retrieve_mac(const std::string& name)
+   {
+   Library_State::Engine_Iterator i(global_state());
+
+   while(const Engine* engine = i.next())
+      {
+      const MessageAuthenticationCode* algo = engine->mac(name);
+      if(algo)
+         return algo;
+      }
+
+   return 0;
+   }
+
+/*************************************************
+* Acquire a string-to-key algorithm              *
+*************************************************/
+const S2K* retrieve_s2k(const std::string& name)
+   {
+   Library_State::Engine_Iterator i(global_state());
+
+   while(const Engine* engine = i.next())
+      {
+      const S2K* algo = engine->s2k(name);
+      if(algo)
+         return algo;
+      }
+
+   return 0;
+   }
+
+/*************************************************
+* Retrieve a block cipher padding method         *
+*************************************************/
+const BlockCipherModePaddingMethod* retrieve_bc_pad(const std::string& name)
+   {
+   Library_State::Engine_Iterator i(global_state());
+
+   while(const Engine* engine = i.next())
+      {
+      const BlockCipherModePaddingMethod* algo = engine->bc_pad(name);
+      if(algo)
+         return algo;
+      }
+
+   return 0;
+   }
+
+/*************************************************
+* Add a new block cipher                         *
+*************************************************/
+void add_algorithm(BlockCipher* algo)
+   {
+   Library_State::Engine_Iterator i(global_state());
+
+   while(Engine* engine_base = i.next())
+      {
+      Default_Engine* engine = dynamic_cast<Default_Engine*>(engine_base);
+      if(engine)
+         {
+         engine->add_algorithm(algo);
+         return;
+         }
+      }
+
+   throw Invalid_State("add_algorithm: Couldn't find the Default_Engine");
+   }
+
+/*************************************************
+* Add a new stream cipher                        *
+*************************************************/
+void add_algorithm(StreamCipher* algo)
+   {
+   Library_State::Engine_Iterator i(global_state());
+
+   while(Engine* engine_base = i.next())
+      {
+      Default_Engine* engine = dynamic_cast<Default_Engine*>(engine_base);
+      if(engine)
+         {
+         engine->add_algorithm(algo);
+         return;
+         }
+      }
+
+   throw Invalid_State("add_algorithm: Couldn't find the Default_Engine");
+   }
+
+/*************************************************
+* Add a new hash function                        *
+*************************************************/
+void add_algorithm(HashFunction* algo)
+   {
+   Library_State::Engine_Iterator i(global_state());
+
+   while(Engine* engine_base = i.next())
+      {
+      Default_Engine* engine = dynamic_cast<Default_Engine*>(engine_base);
+      if(engine)
+         {
+         engine->add_algorithm(algo);
+         return;
+         }
+      }
+
+   throw Invalid_State("add_algorithm: Couldn't find the Default_Engine");
+   }
+
+/*************************************************
+* Add a new authentication code                  *
+*************************************************/
+void add_algorithm(MessageAuthenticationCode* algo)
+   {
+   Library_State::Engine_Iterator i(global_state());
+
+   while(Engine* engine_base = i.next())
+      {
+      Default_Engine* engine = dynamic_cast<Default_Engine*>(engine_base);
+      if(engine)
+         {
+         engine->add_algorithm(algo);
+         return;
+         }
+      }
+
+   throw Invalid_State("add_algorithm: Couldn't find the Default_Engine");
+   }
+
+/*************************************************
+* Add a padding method to the lookup table       *
+*************************************************/
+void add_algorithm(BlockCipherModePaddingMethod* algo)
+   {
+   Library_State::Engine_Iterator i(global_state());
+
+   while(Engine* engine_base = i.next())
+      {
+      Default_Engine* engine = dynamic_cast<Default_Engine*>(engine_base);
+      if(engine)
+         {
+         engine->add_algorithm(algo);
+         return;
+         }
+      }
+
+   throw Invalid_State("add_algorithm: Couldn't find the Default_Engine");
+   }
+
+/*************************************************
+* Get a cipher object                            *
+*************************************************/
+Keyed_Filter* get_cipher(const std::string& algo_spec, Cipher_Dir direction)
+   {
+   Library_State::Engine_Iterator i(global_state());
+
+   while(Engine* engine = i.next())
+      {
+      Keyed_Filter* algo = engine->get_cipher(algo_spec, direction);
+      if(algo)
+         return algo;
+      }
+
+   throw Algorithm_Not_Found(algo_spec);
+   }
+
+/*************************************************
+* Get a cipher object                            *
+*************************************************/
+Keyed_Filter* get_cipher(const std::string& algo_spec, const SymmetricKey& key,
+                         const InitializationVector& iv, Cipher_Dir direction)
+   {
+   Keyed_Filter* cipher = get_cipher(algo_spec, direction);
+   cipher->set_key(key);
+   cipher->set_iv(iv);
+   return cipher;
+   }
+
+/*************************************************
+* Get a cipher object                            *
+*************************************************/
+Keyed_Filter* get_cipher(const std::string& algo_spec, const SymmetricKey& key,
+                         Cipher_Dir direction)
+   {
+   return get_cipher(algo_spec, key, InitializationVector(), direction);
+   }
+
+}