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/*************************************************
* Library Internal/Global State Source File *
* (C) 1999-2008 Jack Lloyd *
*************************************************/
#include <botan/libstate.h>
#include <botan/modules.h>
#include <botan/engine.h>
#include <botan/stl_util.h>
#include <botan/mutex.h>
#include <botan/charset.h>
#include <algorithm>
#if defined(BOTAN_HAS_SELFTEST)
#include <botan/selftest.h>
#endif
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;
}
/*************************************************
* 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 = this->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)
{
Mutex_Holder lock(allocator_lock);
if(type == "")
return;
this->set("conf", "base/default_allocator", type);
cached_default_allocator = 0;
}
/*************************************************
* Get a configuration value *
*************************************************/
std::string Library_State::get(const std::string& section,
const std::string& key) const
{
Mutex_Holder lock(config_lock);
return search_map<std::string, std::string>(config,
section + "/" + key, "");
}
/*************************************************
* See if a particular option has been set *
*************************************************/
bool Library_State::is_set(const std::string& section,
const std::string& key) const
{
Mutex_Holder lock(config_lock);
return search_map(config, section + "/" + key, false, true);
}
/*************************************************
* Set a configuration value *
*************************************************/
void Library_State::set(const std::string& section, const std::string& key,
const std::string& value, bool overwrite)
{
Mutex_Holder lock(config_lock);
std::string full_key = section + "/" + key;
std::map<std::string, std::string>::const_iterator i =
config.find(full_key);
if(overwrite || i == config.end() || i->second == "")
config[full_key] = value;
}
/*************************************************
* Add an alias *
*************************************************/
void Library_State::add_alias(const std::string& key, const std::string& value)
{
set("alias", key, value);
}
/*************************************************
* Dereference an alias to a fixed name *
*************************************************/
std::string Library_State::deref_alias(const std::string& key) const
{
std::string result = key;
while(is_set("alias", result))
result = get("alias", result);
return result;
}
/*************************************************
* Set/Add an option *
*************************************************/
void Library_State::set_option(const std::string key,
const std::string& value)
{
set("conf", key, value);
}
/*************************************************
* Get an option value *
*************************************************/
std::string Library_State::option(const std::string& key) const
{
return get("conf", key);
}
/**
Return a reference to the Algorithm_Factory
*/
Algorithm_Factory& Library_State::algo_factory()
{
if(!algorithm_factory)
throw Invalid_State("Uninitialized in Library_State::algo_factory");
return *algorithm_factory;
}
/*************************************************
* 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");
mutex_factory = modules.mutex_factory(args.thread_safe());
if(!mutex_factory)
throw Invalid_State("Could not acquire a mutex module at init");
allocator_lock = get_mutex();
config_lock = get_mutex();
cached_default_allocator = 0;
std::vector<Allocator*> mod_allocs = modules.allocators(mutex_factory);
for(u32bit j = 0; j != mod_allocs.size(); ++j)
add_allocator(mod_allocs[j]);
set_default_allocator(modules.default_allocator());
load_default_config();
algorithm_factory = new Algorithm_Factory;
std::vector<Engine*> mod_engines = modules.engines();
for(u32bit j = 0; j != mod_engines.size(); ++j)
algorithm_factory->add_engine(mod_engines[j]);
#if defined(BOTAN_HAS_SELFTEST)
if(args.fips_mode() || args.self_test())
{
if(!passes_self_tests())
throw Self_Test_Failure("Initialization self-tests");
}
#endif
}
/*************************************************
* Library_State Constructor *
*************************************************/
Library_State::Library_State()
{
mutex_factory = 0;
allocator_lock = config_lock = 0;
cached_default_allocator = 0;
algorithm_factory = 0;
}
/*************************************************
* Library_State Destructor *
*************************************************/
Library_State::~Library_State()
{
delete algorithm_factory;
cached_default_allocator = 0;
for(u32bit j = 0; j != allocators.size(); ++j)
{
allocators[j]->destroy();
delete allocators[j];
}
delete allocator_lock;
delete mutex_factory;
delete config_lock;
}
}
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