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/* This file is part of the KDE project
Copyright (C) 2001 George Staikos <[email protected]>
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 __bcipher__ko__h
#define __bcipher__ko__h
/* @internal
*/
class BlockCipher {
public:
BlockCipher();
virtual ~BlockCipher();
/*
* Return the current blocksize in bytes.
*/
int blockSize() const;
/*
* Set the encryption key to key. Return true on success.
*/
virtual bool setKey(void *key, int bitlength) = 0;
/*
* Get the required (or if it's variable, then the maximum) key
* length for this cipher in bits.
*/
virtual int keyLen() const = 0;
/*
* True if the key is of a variable length. In this case,
* getKeyLen() will return the maximum length.
*/
virtual bool variableKeyLen() const = 0;
/*
* True if all settings are good and we are ready to encrypt.
*/
virtual bool readyToGo() const = 0;
/*
* Encrypt the block. Returns the number of bytes successfully
* encrypted. Can return -1 on error.
*/
virtual int encrypt(void *block, int len) = 0;
/*
* Decrypt the block. Returns as does encrypt();
*/
virtual int decrypt(void *block, int len) = 0;
protected:
int _blksz;
int _keylen; // in bits
};
#endif
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