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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 __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