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