108 lines
2.4 KiB
C++
108 lines
2.4 KiB
C++
/*
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* steghide 0.5.1 - a steganography program
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* Copyright (C) 1999-2003 Stefan Hetzl <shetzl@chello.at>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*
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*/
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#include "common.h"
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#include "EncryptionMode.h"
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EncryptionMode::EncryptionMode ()
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{
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setValue (ECB) ;
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}
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EncryptionMode::EncryptionMode (EncryptionMode::IRep irep)
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{
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setValue (irep) ;
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}
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EncryptionMode::EncryptionMode (std::string srep)
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{
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setValue (translate (srep)) ;
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}
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void EncryptionMode::setValue (EncryptionMode::IRep irep)
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{
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Value = irep ;
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}
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std::string EncryptionMode::getStringRep () const
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{
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return translate(Value) ;
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}
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EncryptionMode::IRep EncryptionMode::getIntegerRep () const
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{
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return Value ;
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}
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bool EncryptionMode::isValidStringRep (std::string srep)
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{
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bool retval = false ;
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for (unsigned int i = 0 ; i < NumValues ; i++) {
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if (Translations[i].srep == srep) {
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retval = true ;
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}
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}
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return retval ;
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}
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bool EncryptionMode::isValidIntegerRep (unsigned int irep)
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{
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return (irep < NumValues) ;
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}
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std::string EncryptionMode::translate (EncryptionMode::IRep irep)
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{
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std::string retval ;
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bool found = false ;
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for (unsigned int i = 0 ; i < NumValues ; i++) {
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if (Translations[i].irep == irep) {
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retval = std::string (Translations[i].srep) ;
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found = true ;
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}
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}
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myassert (found) ;
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return retval ;
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}
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EncryptionMode::IRep EncryptionMode::translate (std::string srep)
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{
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IRep retval = ECB ;
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bool found = false ;
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for (unsigned int i = 0 ; i < NumValues ; i++) {
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if (Translations[i].srep == srep) {
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retval = Translations[i].irep ;
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found = true ;
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}
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}
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myassert (found) ;
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return retval ;
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}
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const EncryptionMode::Translation EncryptionMode::Translations[] = {
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{ ECB, "ecb" },
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{ CBC, "cbc" },
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{ OFB, "ofb" },
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{ CFB, "cfb" },
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{ NOFB, "nofb" },
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{ NCFB, "ncfb" },
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{ CTR, "ctr" },
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{ STREAM, "stream" }
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} ;
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