/*!
	\file DigestImplFactory.h
	\author yangde
	\date 24/6/2006
*/

#ifndef _LUCID_ENCRYPTION_DIGESTIMPLFACTORY_H_
#define _LUCID_ENCRYPTION_DUGESTIMPLFACTORY_H_

#include "ShareLib.h"

#include "EncodeAlgorithm.h"

namespace Lucid {

namespace Encryption {

class TDigestImplBase;

//! \class TDImplFactory
/*!
	\brief Factory class create encoder implementation
*/
class TEncoderImplFactory {
public:

	/*!
		\brief get encoder implementation factory singleton
	*/
	static TEncoderImplFactory& GetSingleton() {
		static TEncoderImplFactory factory;
		return factory;
	}

	/*!
		\brief create encoder implementation
		\param key key for encryption
		\param key_length length of key
		\param iv initial vector encryption
		\param iv_length length of initial vector
		\param algorithm encode algorithm used
	*/
	TEncoderImplBase* CreateEncoderImpl(const unsigned char* key, unsigned int key_length, const unsigned char* iv = 0, unsigned int iv_length = 0, TEncodeAlgorithm algorithm = NO_ENCODE);

private:
	TEncoderImplFactory() {}
	TEncoderImplFactory(const TEncoderImplFactory&);
	TEncoderImplFactory& operator=(const TEncoderImplFactory&);
	~TEncoderImplFactory() {}
};

#define ENCODER_IMPL_FACTORY TEncoderImplFactory::GetSingleton()

}

}

#endif	// _LUCID_ENCRYPTION_ENCODERIMPLFACTORY_H_