decrypt.h

00001 
00002 /***************************************************************************
00003  *  decrypt.h - WorldInfo decryption routine
00004  *
00005  *  Created: Thu May 03 15:53:20 2007
00006  *  Copyright  2006-2007  Tim Niemueller [www.niemueller.de]
00007  *
00008  ****************************************************************************/
00009 
00010 /*  This program is free software; you can redistribute it and/or modify
00011  *  it under the terms of the GNU General Public License as published by
00012  *  the Free Software Foundation; either version 2 of the License, or
00013  *  (at your option) any later version. A runtime exception applies to
00014  *  this software (see LICENSE.GPL_WRE file mentioned below for details).
00015  *
00016  *  This program is distributed in the hope that it will be useful,
00017  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00018  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00019  *  GNU Library General Public License for more details.
00020  *
00021  *  Read the full text in the LICENSE.GPL_WRE file in the doc directory.
00022  */
00023 
00024 #ifndef __NETCOMM_WORLDINFO_DECRYPT_H_
00025 #define __NETCOMM_WORLDINFO_DECRYPT_H_
00026 
00027 #include <core/exception.h>
00028 #include <cstddef>
00029 
00030 namespace fawkes {
00031 
00032 class MessageDecryptionException : public Exception
00033 {
00034  public:
00035   MessageDecryptionException(const char *msg);
00036 };
00037 
00038 
00039 class WorldInfoMessageDecryptor
00040 {
00041  public:
00042   WorldInfoMessageDecryptor(const unsigned char *key, const unsigned char *iv);
00043   ~WorldInfoMessageDecryptor();
00044 
00045   void set_plain_buffer(void *buffer, size_t buffer_length);
00046   void set_crypt_buffer(void *buffer, size_t buffer_length);
00047 
00048   size_t decrypt();
00049 
00050  private:
00051   void    *plain_buffer;
00052   size_t   plain_buffer_length;
00053   void    *crypt_buffer;
00054   size_t   crypt_buffer_length;
00055 
00056   const unsigned char *key;
00057   const unsigned char *iv;
00058 };
00059 
00060 } // end namespace fawkes
00061 
00062 
00063 #endif