EncryptionMode.h

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00001 /*
00002  * steghide 0.5.1 - a steganography program
00003  * Copyright (C) 1999-2003 Stefan Hetzl <shetzl@chello.at>
00004  *
00005  * This program is free software; you can redistribute it and/or
00006  * modify it under the terms of the GNU General Public License
00007  * as published by the Free Software Foundation; either version 2
00008  * of the License, or (at your option) any later version.
00009  *
00010  * This program is distributed in the hope that it will be useful,
00011  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00012  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00013  * GNU General Public License for more details.
00014  *
00015  * You should have received a copy of the GNU General Public License
00016  * along with this program; if not, write to the Free Software
00017  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
00018  *
00019  */
00020 
00021 #ifndef SH_ENCMODE_H
00022 #define SH_ENCMODE_H
00023 
00024 #include <string>
00025 
00026 class EncryptionMode {
00027         public:
00029         static const unsigned int IRep_size = 3 ;
00030 
00032         enum IRep {
00033                 ECB = 0,
00034                 CBC = 1,
00035                 OFB = 2,
00036                 CFB = 3,
00037                 NOFB = 4,
00038                 NCFB = 5,
00039                 CTR = 6,
00040                 STREAM = 7
00041         } ;
00042 
00046         EncryptionMode (void) ;
00047         EncryptionMode (IRep irep) ;
00052         EncryptionMode (std::string srep) ;
00053 
00054         void setValue (IRep irep) ;
00055 
00056         std::string getStringRep (void) const ;
00057         IRep getIntegerRep (void) const ;
00058 
00059         bool operator== (const EncryptionMode& mode) const
00060                 { return (Value == mode.Value) ; } ;
00061 
00062         static bool isValidStringRep (std::string srep) ;
00063         static bool isValidIntegerRep (unsigned int irep) ;
00064 
00065         static std::string translate (IRep irep) ;
00066         static IRep translate (std::string srep) ;
00067 
00068         private:
00069         static const unsigned int NumValues = 8 ;
00070         IRep Value ;
00071 
00072         typedef struct struct_Translation {
00073                 IRep    irep ;
00074                 char*   srep ;
00075         } Translation ;
00076         static const Translation Translations[] ;
00077 } ;
00078 
00079 #endif // ndef SH_ENCMODE_H

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