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/*************************************************
* Library Internal/Global State Source File *
* (C) 1999-2008 Jack Lloyd *
*************************************************/
#include <botan/libstate.h>
#include <botan/config.h>
#include <botan/modules.h>
#include <botan/engine.h>
#include <botan/stl_util.h>
#include <botan/mutex.h>
#include <botan/charset.h>
#include <botan/x931_rng.h>
#include <botan/randpool.h>
#include <botan/selftest.h>
#include <algorithm>
namespace Botan {
/*************************************************
* Botan's global state *
*************************************************/
namespace {
Library_State* global_lib_state = 0;
}
/*************************************************
* Access the global state object *
*************************************************/
Library_State& global_state()
{
if(!global_lib_state)
LibraryInitializer::initialize();
return (*global_lib_state);
}
/*************************************************
* Set a new global state object *
*************************************************/
void set_global_state(Library_State* new_state)
{
delete swap_global_state(new_state);
}
/*************************************************
* Swap two global state objects *
*************************************************/
Library_State* swap_global_state(Library_State* new_state)
{
Library_State* old_state = global_lib_state;
global_lib_state = new_state;
return old_state;
}
/*************************************************
* Increment the Engine iterator *
*************************************************/
Engine* Library_State::Engine_Iterator::next()
{
return lib.get_engine_n(n++);
}
/*************************************************
* Get a new mutex object *
*************************************************/
Mutex* Library_State::get_mutex() const
{
return mutex_factory->make();
}
/*************************************************
* Get an allocator by its name *
*************************************************/
Allocator* Library_State::get_allocator(const std::string& type) const
{
Mutex_Holder lock(allocator_lock);
if(type != "")
return search_map<std::string, Allocator*>(alloc_factory, type, 0);
if(!cached_default_allocator)
{
std::string chosen = config().option("base/default_allocator");
if(chosen == "")
chosen = "malloc";
cached_default_allocator =
search_map<std::string, Allocator*>(alloc_factory, chosen, 0);
}
return cached_default_allocator;
}
/*************************************************
* Create a new name to object mapping *
*************************************************/
void Library_State::add_allocator(Allocator* allocator)
{
Mutex_Holder lock(allocator_lock);
allocator->init();
allocators.push_back(allocator);
alloc_factory[allocator->type()] = allocator;
}
/*************************************************
* Set the default allocator type *
*************************************************/
void Library_State::set_default_allocator(const std::string& type) const
{
Mutex_Holder lock(allocator_lock);
if(type == "")
return;
config().set("conf", "base/default_allocator", type);
cached_default_allocator = 0;
}
/*************************************************
* Get an engine out of the list *
*************************************************/
Engine* Library_State::get_engine_n(u32bit n) const
{
Mutex_Holder lock(engine_lock);
if(n >= engines.size())
return 0;
return engines[n];
}
/*************************************************
* Add a new engine to the list *
*************************************************/
void Library_State::add_engine(Engine* engine)
{
Mutex_Holder lock(engine_lock);
engines.insert(engines.begin(), engine);
}
/*************************************************
* Get the configuration object *
*************************************************/
Config& Library_State::config() const
{
if(!config_obj)
{
config_obj = new Config();
config_obj->load_defaults();
}
return (*config_obj);
}
/*************************************************
* Set the configuration object *
*************************************************/
std::string Library_State::option(const std::string& name) const
{
return config().option(name);
}
/*************************************************
* Load a set of modules *
*************************************************/
void Library_State::initialize(const InitializerOptions& args,
Modules& modules)
{
if(mutex_factory)
throw Invalid_State("Library_State has already been initialized");
if(args.thread_safe())
mutex_factory = modules.mutex_factory();
else
mutex_factory = new Default_Mutex_Factory;
allocator_lock = get_mutex();
engine_lock = get_mutex();
cached_default_allocator = 0;
std::vector<Allocator*> mod_allocs = modules.allocators();
for(u32bit j = 0; j != mod_allocs.size(); ++j)
add_allocator(mod_allocs[j]);
set_default_allocator(modules.default_allocator());
std::vector<Engine*> mod_engines = modules.engines();
for(u32bit j = 0; j != mod_engines.size(); ++j)
engines.push_back(mod_engines[j]);
if(args.fips_mode() || args.self_test())
{
if(!passes_self_tests())
throw Self_Test_Failure("Initialization self-tests");
}
}
/*************************************************
* Library_State Constructor *
*************************************************/
Library_State::Library_State()
{
mutex_factory = 0;
allocator_lock = engine_lock = 0;
config_obj = 0;
cached_default_allocator = 0;
}
/*************************************************
* Library_State Destructor *
*************************************************/
Library_State::~Library_State()
{
delete config_obj;
std::for_each(engines.begin(), engines.end(), del_fun<Engine>());
cached_default_allocator = 0;
for(u32bit j = 0; j != allocators.size(); ++j)
{
allocators[j]->destroy();
delete allocators[j];
}
delete allocator_lock;
delete engine_lock;
delete mutex_factory;
}
}
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