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/*************************************************
* Default Initialization Function Source File *
* (C) 1999-2006 The Botan Project *
*************************************************/
#include <botan/init.h>
#include <botan/libstate.h>
#include <botan/modules.h>
#include <botan/config.h>
#include <botan/defalloc.h>
#include <botan/fips140.h>
#include <botan/x931_rng.h>
#include <botan/def_char.h>
namespace Botan {
/*************************************************
* Library Initialization *
*************************************************/
LibraryInitializer::LibraryInitializer(const std::string& arg_string)
{
Init::initialize(arg_string);
}
/*************************************************
* Library Shutdown *
*************************************************/
LibraryInitializer::~LibraryInitializer()
{
Init::deinitialize();
}
namespace Init {
/*************************************************
* Library Initialization *
*************************************************/
void initialize(const std::string& arg_string)
{
InitializerOptions args(arg_string);
Builtin_Modules modules(false);
Mutex_Factory* mutex_factory = 0;
if(args.thread_safe())
{
mutex_factory = modules.mutex_factory();
if(!mutex_factory)
throw Exception("LibraryInitializer: thread safety impossible");
}
set_global_state(new Library_State(mutex_factory));
global_state().config().load_defaults();
if(args.config_file() != "")
global_config().load_inifile(args.config_file());
global_state().load(modules);
global_state().set_prng(new ANSI_X931_RNG);
const u32bit min_entropy =
global_config().option_as_u32bit("rng/min_entropy");
if(min_entropy != 0 && args.seed_rng())
{
u32bit bits_so_far = 0;
for(u32bit j = 0; j != 4; ++j)
{
u32bit to_get = min_entropy - bits_so_far;
bits_so_far += global_state().seed_prng(true, to_get);
if(bits_so_far >= min_entropy)
break;
}
if(bits_so_far < min_entropy)
throw PRNG_Unseeded("Unable to collect sufficient entropy");
}
if(!FIPS140::passes_self_tests())
{
deinitialize();
throw Self_Test_Failure("FIPS-140 startup tests");
}
}
/*************************************************
* Library Shutdown *
*************************************************/
void deinitialize()
{
set_global_state(0);
}
}
}
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