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/*
* Algorithm Factory
* (C) 2008 Jack Lloyd
*
* Botan is released under the Simplified BSD License (see license.txt)
*/
#ifndef BOTAN_ALGORITHM_FACTORY_H__
#define BOTAN_ALGORITHM_FACTORY_H__
#include <botan/types.h>
#include <string>
#include <vector>
namespace Botan {
/**
* Forward declarations (don't need full definitions here)
*/
class BlockCipher;
class StreamCipher;
class HashFunction;
class MessageAuthenticationCode;
class PBKDF;
template<typename T> class Algorithm_Cache;
class Engine;
/**
* Algorithm Factory
*/
class BOTAN_DLL Algorithm_Factory
{
public:
/**
* Constructor
*/
Algorithm_Factory();
/**
* Destructor
*/
~Algorithm_Factory();
/**
* @param engine to add (Algorithm_Factory takes ownership)
*/
void add_engine(Engine* engine);
/**
* Clear out any cached objects
*/
void clear_caches();
/**
* @param algo_spec the algorithm we are querying
* @returns list of providers of this algorithm
*/
std::vector<std::string> providers_of(const std::string& algo_spec);
/**
* @param algo_spec the algorithm we are setting a provider for
* @param provider the provider we would like to use
*/
void set_preferred_provider(const std::string& algo_spec,
const std::string& provider);
/**
* @param algo_spec the algorithm we want
* @param provider the provider we would like to use
* @returns pointer to const prototype object, ready to clone(), or NULL
*/
const BlockCipher*
prototype_block_cipher(const std::string& algo_spec,
const std::string& provider = "");
/**
* @param algo_spec the algorithm we want
* @param provider the provider we would like to use
* @returns pointer to freshly created instance of the request algorithm
*/
BlockCipher* make_block_cipher(const std::string& algo_spec,
const std::string& provider = "");
/**
* @param algo_spec the algorithm we want
* @param provider the provider we would like to use
* @returns pointer to const prototype object, ready to clone(), or NULL
*/
const StreamCipher*
prototype_stream_cipher(const std::string& algo_spec,
const std::string& provider = "");
/**
* @param algo_spec the algorithm we want
* @param provider the provider we would like to use
* @returns pointer to freshly created instance of the request algorithm
*/
StreamCipher* make_stream_cipher(const std::string& algo_spec,
const std::string& provider = "");
/**
* @param algo_spec the algorithm we want
* @param provider the provider we would like to use
* @returns pointer to const prototype object, ready to clone(), or NULL
*/
const HashFunction*
prototype_hash_function(const std::string& algo_spec,
const std::string& provider = "");
/**
* @param algo_spec the algorithm we want
* @param provider the provider we would like to use
* @returns pointer to freshly created instance of the request algorithm
*/
HashFunction* make_hash_function(const std::string& algo_spec,
const std::string& provider = "");
/**
* @param algo_spec the algorithm we want
* @param provider the provider we would like to use
* @returns pointer to const prototype object, ready to clone(), or NULL
*/
const MessageAuthenticationCode*
prototype_mac(const std::string& algo_spec,
const std::string& provider = "");
/**
* @param algo_spec the algorithm we want
* @param provider the provider we would like to use
* @returns pointer to freshly created instance of the request algorithm
*/
MessageAuthenticationCode* make_mac(const std::string& algo_spec,
const std::string& provider = "");
/**
* @param algo_spec the algorithm we want
* @param provider the provider we would like to use
* @returns pointer to const prototype object, ready to clone(), or NULL
*/
const PBKDF* prototype_pbkdf(const std::string& algo_spec,
const std::string& provider = "");
/**
* @param algo_spec the algorithm we want
* @param provider the provider we would like to use
* @returns pointer to freshly created instance of the request algorithm
*/
PBKDF* make_pbkdf(const std::string& algo_spec,
const std::string& provider = "");
private:
std::vector<Engine*> engines;
std::unique_ptr<Algorithm_Cache<BlockCipher>> block_cipher_cache;
std::unique_ptr<Algorithm_Cache<StreamCipher>> stream_cipher_cache;
std::unique_ptr<Algorithm_Cache<HashFunction>> hash_cache;
std::unique_ptr<Algorithm_Cache<MessageAuthenticationCode>> mac_cache;
std::unique_ptr<Algorithm_Cache<PBKDF>> pbkdf_cache;
};
}
#endif
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