diff options
Diffstat (limited to 'comm/third_party/botan/src/lib/utils/dyn_load/dyn_load.h')
-rw-r--r-- | comm/third_party/botan/src/lib/utils/dyn_load/dyn_load.h | 68 |
1 files changed, 68 insertions, 0 deletions
diff --git a/comm/third_party/botan/src/lib/utils/dyn_load/dyn_load.h b/comm/third_party/botan/src/lib/utils/dyn_load/dyn_load.h new file mode 100644 index 0000000000..3caf65f277 --- /dev/null +++ b/comm/third_party/botan/src/lib/utils/dyn_load/dyn_load.h @@ -0,0 +1,68 @@ +/* +* Dynamically Loaded Object +* (C) 2010 Jack Lloyd +* +* Botan is released under the Simplified BSD License (see license.txt) +*/ + +#ifndef BOTAN_DYNAMIC_LOADER_H_ +#define BOTAN_DYNAMIC_LOADER_H_ + +#include <botan/types.h> +#include <string> + +namespace Botan { + +/** +* Represents a DLL or shared object +*/ +class BOTAN_PUBLIC_API(2,0) Dynamically_Loaded_Library final + { + public: + /** + * Load a DLL (or fail with an exception) + * @param lib_name name or path to a library + * + * If you don't use a full path, the search order will be defined + * by whatever the system linker does by default. Always using fully + * qualified pathnames can help prevent code injection attacks (eg + * via manipulation of LD_LIBRARY_PATH on Linux) + */ + Dynamically_Loaded_Library(const std::string& lib_name); + + /** + * Unload the DLL + * @warning Any pointers returned by resolve()/resolve_symbol() + * should not be used after this destructor runs. + */ + ~Dynamically_Loaded_Library(); + + /** + * Load a symbol (or fail with an exception) + * @param symbol names the symbol to load + * @return address of the loaded symbol + */ + void* resolve_symbol(const std::string& symbol); + + /** + * Convenience function for casting symbol to the right type + * @param symbol names the symbol to load + * @return address of the loaded symbol + */ + template<typename T> + T resolve(const std::string& symbol) + { + return reinterpret_cast<T>(resolve_symbol(symbol)); + } + + private: + Dynamically_Loaded_Library(const Dynamically_Loaded_Library&); + Dynamically_Loaded_Library& operator=(const Dynamically_Loaded_Library&); + + std::string m_lib_name; + void* m_lib; + }; + +} + +#endif |