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/* This file is part of the KDE project
Copyright (C) 2001 George Staikos <staikos@kde.org>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to
the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#ifndef __CBC__KO__H
#define __CBC__KO__H
#include "blockcipher.h"
/* @internal
* Initialize this class with a pointer to a valid, uninitialized BlockCipher
* and it will apply that cipher using CBC. You may want to make the
* initial block a full block of random data. Do not change the block size
* at any time!! You must pad it yourself. Also, you can only encrypt or
* decrypt. You can't do both with a given instance. After you call one,
* calls to the other will fail in this instance.
*/
class CipherBlockChain : public BlockCipher {
public:
CipherBlockChain(BlockCipher *cipher);
virtual ~CipherBlockChain();
virtual bool setKey(void *key, int bitlength);
virtual int keyLen() const;
virtual bool variableKeyLen() const;
virtual bool readyToGo() const;
virtual int encrypt(void *block, int len);
virtual int decrypt(void *block, int len);
private:
BlockCipher *_cipher;
void *_register;
void *_next;
int _len;
int _reader, _writer;
};
#endif
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