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/*
* Library Internal/Global State
* (C) 1999-2010 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#include <botan/libstate.h>
#include <botan/charset.h>
#include <botan/engine.h>
#include <botan/cpuid.h>
#include <botan/internal/core_engine.h>
#include <botan/internal/stl_util.h>
#include <botan/internal/mlock.h>
#include <algorithm>
#if defined(BOTAN_HAS_SELFTESTS)
#include <botan/selftest.h>
#endif
#if defined(BOTAN_HAS_ENGINE_ASSEMBLER)
#include <botan/internal/asm_engine.h>
#endif
#if defined(BOTAN_HAS_ENGINE_AES_ISA)
#include <botan/internal/aes_isa_engine.h>
#endif
#if defined(BOTAN_HAS_ENGINE_SIMD)
#include <botan/internal/simd_engine.h>
#endif
#if defined(BOTAN_HAS_ENGINE_GNU_MP)
#include <botan/internal/gnump_engine.h>
#endif
#if defined(BOTAN_HAS_ENGINE_OPENSSL)
#include <botan/internal/openssl_engine.h>
#endif
namespace Botan {
/*
* Get a configuration value
*/
std::string Library_State::get(const std::string& section,
const std::string& key)
{
std::lock_guard<std::mutex> 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)
{
std::lock_guard<std::mutex> lock(config_lock);
return config.count(section + "/" + key) != 0;
}
/*
* Set a configuration value
*/
void Library_State::set(const std::string& section, const std::string& key,
const std::string& value, bool overwrite)
{
std::lock_guard<std::mutex> lock(config_lock);
std::string full_key = section + "/" + key;
auto 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)
{
std::string result = key;
while(is_set("alias", result))
result = get("alias", result);
return result;
}
/*
* Return a reference to the Algorithm_Factory
*/
Algorithm_Factory& Library_State::algorithm_factory() const
{
if(!m_algorithm_factory)
throw Invalid_State("Uninitialized in Library_State::algorithm_factory");
return *m_algorithm_factory;
}
/*
* Return a reference to the global PRNG
*/
RandomNumberGenerator& Library_State::global_rng()
{
std::lock_guard<std::mutex> lock(global_rng_lock);
if(!global_rng_ptr)
global_rng_ptr = make_global_rng(algorithm_factory(),
global_rng_lock);
return *global_rng_ptr;
}
/*
* Load a set of modules
*/
void Library_State::initialize()
{
CPUID::initialize();
if(m_algorithm_factory)
throw Invalid_State("Library_State has already been initialized");
load_default_config();
m_algorithm_factory = new Algorithm_Factory();
#if defined(BOTAN_HAS_ENGINE_GNU_MP)
algorithm_factory().add_engine(new GMP_Engine);
#endif
#if defined(BOTAN_HAS_ENGINE_OPENSSL)
algorithm_factory().add_engine(new OpenSSL_Engine);
#endif
#if defined(BOTAN_HAS_ENGINE_AES_ISA)
algorithm_factory().add_engine(new AES_ISA_Engine);
#endif
#if defined(BOTAN_HAS_ENGINE_SIMD)
algorithm_factory().add_engine(new SIMD_Engine);
#endif
#if defined(BOTAN_HAS_ENGINE_ASSEMBLER)
algorithm_factory().add_engine(new Assembler_Engine);
#endif
algorithm_factory().add_engine(new Core_Engine);
#if defined(BOTAN_HAS_SELFTESTS)
confirm_startup_self_tests(algorithm_factory());
#endif
}
/*
* Library_State Constructor
*/
Library_State::Library_State()
{
m_algorithm_factory = 0;
global_rng_ptr = 0;
}
/*
* Library_State Destructor
*/
Library_State::~Library_State()
{
delete m_algorithm_factory;
m_algorithm_factory = 0;
delete global_rng_ptr;
global_rng_ptr = 0;
}
}
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