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/*
* Library Internal/Global State
* (C) 1999-2008 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#ifndef BOTAN_LIB_STATE_H__
#define BOTAN_LIB_STATE_H__
#include <botan/global_state.h>
#include <botan/algo_factory.h>
#include <botan/rng.h>
#include <mutex>
#include <string>
#include <vector>
#include <map>
#include <memory>
namespace Botan {
/**
* Global Library State
*/
class BOTAN_DLL Library_State
{
public:
Library_State() {}
Library_State(const Library_State&) = delete;
Library_State& operator=(const Library_State&) = delete;
void initialize();
/**
* @return global Algorithm_Factory
*/
Algorithm_Factory& algorithm_factory() const;
/**
* @return global RandomNumberGenerator
*/
RandomNumberGenerator& global_rng();
void poll_available_sources(class Entropy_Accumulator& accum);
/**
* Get a parameter value as std::string.
* @param section the section of the desired key
* @param key the desired keys name
* @result the value of the parameter
*/
std::string get(const std::string& section,
const std::string& key);
/**
* Check whether a certain parameter is set or not.
* @param section the section of the desired key
* @param key the desired keys name
* @result true if the parameters value is set,
* false otherwise
*/
bool is_set(const std::string& section,
const std::string& key);
/**
* Set a configuration parameter.
* @param section the section of the desired key
* @param key the desired keys name
* @param value the new value
* @param overwrite if set to true, the parameters value
* will be overwritten even if it is already set, otherwise
* no existing values will be overwritten.
*/
void set(const std::string& section,
const std::string& key,
const std::string& value,
bool overwrite = true);
/**
* Add a parameter value to the "alias" section.
* @param key the name of the parameter which shall have a new alias
* @param value the new alias
*/
void add_alias(const std::string& key,
const std::string& value);
/**
* Resolve an alias.
* @param alias the alias to resolve.
* @return what the alias stands for
*/
std::string deref_alias(const std::string& alias);
private:
static std::vector<std::unique_ptr<EntropySource>> entropy_sources();
void load_default_config();
std::unique_ptr<Serialized_RNG> m_global_prng;
std::mutex m_entropy_src_mutex;
std::vector<std::unique_ptr<EntropySource>> m_sources;
std::mutex config_lock;
std::map<std::string, std::string> config;
std::unique_ptr<Algorithm_Factory> m_algorithm_factory;
};
}
#endif
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