File indexing completed on 2024-06-16 03:53:04

 /*
     This file is part of the KDE project
     SPDX-FileCopyrightText: 2001 George Staikos <staikos@kde.org>
 
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 #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, bool useECBforReading = false);
     ~CipherBlockChain() override;
 
     bool setKey(void *key, int bitlength) override;
 
     int keyLen() const override;
 
     bool variableKeyLen() const override;
 
     bool readyToGo() const override;
 
     int encrypt(void *block, int len) override;
 
     int decrypt(void *block, int len) override;
 
 private:
     void initRegister();
     int decryptECB(void *block, int len);
 
     BlockCipher *_cipher;
     void *_register;
     void *_next;
     int _len;
     int _reader, _writer;
     bool _useECBforReading;
 };
 
 #endif