1 files changed, 63 insertions, 0 deletions
diff --git a/lib/engine/dyn_engine/dyn_engine.cpp b/lib/engine/dyn_engine/dyn_engine.cpp
new file mode 100644
index 000000000..078ec4b83
--- /dev/null
+++ b/lib/engine/dyn_engine/dyn_engine.cpp
@@ -0,0 +1,63 @@
+/**
+* Dynamically Loaded Engine
+* (C) 2010 Jack Lloyd
+*
+* Distributed under the terms of the Botan license
+*/
+
+#include <botan/dyn_engine.h>
+#include <botan/internal/dyn_load.h>
+
+namespace Botan {
+
+namespace {
+
+extern "C" {
+   typedef Engine* (*creator_func)(void);
+   typedef u32bit (*module_version_func)(void);
+}
+
+}
+
+Dynamically_Loaded_Engine::Dynamically_Loaded_Engine(
+   const std::string& library_path) :
+   engine(nullptr)
+   {
+   lib = new Dynamically_Loaded_Library(library_path);
+
+   try
+      {
+      module_version_func get_version =
+         lib->resolve<module_version_func>("module_version");
+
+      const u32bit mod_version = get_version();
+
+      if(mod_version != 20101003)
+         throw std::runtime_error("Incompatible version in " +
+                                  library_path + " of " +
+                                  std::to_string(mod_version));
+
+      creator_func creator =
+         lib->resolve<creator_func>("create_engine");
+
+      engine = creator();
+
+      if(!engine)
+         throw std::runtime_error("Creator function in " +
+                                  library_path + " failed");
+      }
+   catch(...)
+      {
+      delete lib;
+      lib = nullptr;
+      throw;
+      }
+   }
+
+Dynamically_Loaded_Engine::~Dynamically_Loaded_Engine()
+   {
+   delete engine;
+   delete lib;
+   }
+
+}