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