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/*
* The Mana World Server
* Copyright 2004 The Mana World Development Team
*
* This file is part of The Mana World.
*
* The Mana World is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or any later version.
*
* The Mana World is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with The Mana World; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* $Id$
*/
#ifndef _TMWSERV_CIPHER_H_
#define _TMWSERV_CIPHER_H_
#include <string>
#include "singleton.h"
namespace tmwserv
{
namespace utils
{
/**
* A helper class for the encoding of strings using different algorithms.
*
* Notes:
* - this class implements the Meyer's singleton design pattern.
* - this class uses the OpenSSL's crypto library.
*/
class Cipher: public Singleton<Cipher>
{
// friend so that Singleton can call the constructor.
friend class Singleton<Cipher>;
public:
/**
* Encode using the MD5 digest algorithm.
*
* @param str the string to encode.
*
* @return the MD5 digest hash string.
*/
std::string
md5(const std::string& str);
/**
* Add encryption algorithms here.
*/
private:
/**
* Default constructor.
*/
Cipher(void)
throw();
/**
* Destructor.
*/
~Cipher(void)
throw();
/**
* Copy constructor.
*/
Cipher(const Cipher& rhs);
/**
* Assignment operator.
*/
Cipher&
operator=(const Cipher& rhs);
/**
* Convert a string into hexadecimal.
*
* @param str the string to convert.
* @param length the string length.
*
* @return the hexadecimal string.
*/
std::string
toHex(const unsigned char* str,
const unsigned short length);
};
} // namespace utils
} // namespace tmwserv
#endif // _TMWSERV_CIPHER_H_
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