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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