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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/conf.h>
#include <botan/parsing.h>
#include <botan/defalloc.h>
#include <botan/eng_def.h>
#include <botan/fips140.h>
#include <botan/x931_rng.h>
namespace Botan {
/*************************************************
* Library Initialization *
*************************************************/
LibraryInitializer::LibraryInitializer(const std::string& arg_string)
{
Init::initialize(arg_string);
}
/*************************************************
* Library Shutdown *
*************************************************/
LibraryInitializer::~LibraryInitializer()
{
Init::deinitialize();
}
namespace Init {
namespace {
/*************************************************
* Parse the options string *
*************************************************/
std::map<std::string, std::string> parse_args(const std::string& arg_string)
{
std::map<std::string, std::string> arg_map;
std::vector<std::string> args = split_on(arg_string, ' ');
for(u32bit j = 0; j != args.size(); ++j)
{
if(args[j].find('=') == std::string::npos)
arg_map[args[j]] = "";
else
{
std::vector<std::string> name_and_value = split_on(args[j], '=');
arg_map[name_and_value[0]] = name_and_value[1];
}
}
return arg_map;
}
/*************************************************
* Check if an option is set in the argument *
*************************************************/
bool arg_set(const std::map<std::string, std::string>& args,
const std::string& option)
{
return (args.find(option) != args.end());
}
}
/*************************************************
* Library Initialization *
*************************************************/
void initialize(const std::string& arg_string)
{
std::map<std::string, std::string> args = parse_args(arg_string);
Mutex_Factory* mutex_factory = 0;
if(arg_set(args, "thread_safe"))
{
mutex_factory = Modules::get_mutex_factory();
if(!mutex_factory)
throw Exception("LibraryInitializer: thread safety impossible");
}
set_global_state(new Library_State(mutex_factory,
Modules::get_timer()));
global_state().add_allocator("malloc", new Malloc_Allocator);
global_state().add_allocator("locking", new Locking_Allocator);
if(arg_set(args, "secure_memory"))
{
std::map<std::string, Allocator*> allocators = Modules::get_allocators();
for(std::map<std::string, Allocator*>::iterator i = allocators.begin();
i != allocators.end(); ++i)
global_state().add_allocator(i->first, i->second);
}
if(arg_set(args, "config") && args["config"] != "")
Config::load(args["config"], global_state());
if(arg_set(args, "use_engines"))
{
std::vector<Engine*> engines = Modules::get_engines();
for(u32bit j = 0; j != engines.size(); ++j)
global_state().add_engine(engines[j]);
}
global_state().add_engine(new Default_Engine);
global_state().set_prng(new ANSI_X931_RNG);
std::vector<EntropySource*> sources = Modules::get_entropy_sources();
for(u32bit j = 0; j != sources.size(); ++j)
global_state().add_entropy_source(sources[j], true);
const u32bit min_entropy = Config::get_u32bit("rng/min_entropy");
if(min_entropy != 0 && !arg_set(args, "no_rng_seed"))
{
u32bit total_bits = 0;
for(u32bit j = 0; j != 4; ++j)
{
total_bits += global_state().seed_prng(true,
min_entropy - total_bits);
if(total_bits >= min_entropy)
break;
}
if(total_bits < min_entropy)
throw PRNG_Unseeded("Unable to collect sufficient entropy");
}
if(!FIPS140::passes_self_tests())
{
set_global_state(0);
throw Self_Test_Failure("FIPS-140 startup tests");
}
}
/*************************************************
* Library Shutdown *
*************************************************/
void deinitialize()
{
set_global_state(0);
}
}
}
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