/* 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 __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