encrypt.h

00001 
00002 /***************************************************************************
00003  *  encrypt.h - WorldInfo encryptio routine
00004  *
00005  *  Created: Thu May 03 15:01:13 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_ENCRYPT_H_
00025 #define __NETCOMM_WORLDINFO_ENCRYPT_H_
00026 
00027 #include <core/exception.h>
00028 #include <cstddef>
00029 
00030 namespace fawkes {
00031 
00032 class MessageEncryptionException : public Exception
00033 {
00034  public:
00035   MessageEncryptionException(const char *msg);
00036 };
00037 
00038 class WorldInfoMessageEncryptor
00039 {
00040  public:
00041   WorldInfoMessageEncryptor(const unsigned char *key, const unsigned char *iv);
00042   ~WorldInfoMessageEncryptor();
00043 
00044   void set_plain_buffer(void *buffer, size_t buffer_length);
00045   void set_crypt_buffer(void *buffer, size_t buffer_length);
00046 
00047   size_t recommended_crypt_buffer_size();
00048 
00049   size_t encrypt();
00050 
00051  private:
00052   void    *plain_buffer;
00053   size_t   plain_buffer_length;
00054   void    *crypt_buffer;
00055   size_t   crypt_buffer_length;
00056 
00057   const unsigned char *key;
00058   const unsigned char *iv;
00059 };
00060 
00061 } // end namespace fawkes
00062 
00063 #endif