runtime/kwalletd/backend/cbc.h

   1 /* This file is part of the KDE project
   2    Copyright (C) 2001 George Staikos <staikos@kde.org>
   3
   4    This library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Library General Public
   6    License as published by the Free Software Foundation; either
   7    version 2 of the License, or (at your option) any later version.
   8
   9    This library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public License
  15    along with this library; see the file COPYING.LIB.  If not, write to
  16    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  17    Boston, MA 02110-1301, USA.
  18 */
  19
  20
  21
  22 #ifndef __CBC__KO__H
  23 #define __CBC__KO__H
  24
  25 #include "blockcipher.h"
  26
  27 /* @internal
  28  *   Initialize this class with a pointer to a valid, uninitialized BlockCipher
  29  *   and it will apply that cipher using CBC.  You may want to make the
  30  *   initial block a full block of random data.  Do not change the block size
  31  *   at any time!!  You must pad it yourself.  Also, you can only encrypt or
  32  *   decrypt.  You can't do both with a given instance.  After you call one,
  33  *   calls to the other will fail in this instance.
  34  */
  35
  36 class CipherBlockChain : public BlockCipher {
  37         public:
  38                 CipherBlockChain(BlockCipher *cipher);
  39                 virtual ~CipherBlockChain();
  40
  41                 virtual bool setKey(void *key, int bitlength);
  42
  43                 virtual int keyLen() const;
  44
  45                 virtual bool variableKeyLen() const;
  46
  47                 virtual bool readyToGo() const;
  48
  49                 virtual int encrypt(void *block, int len);
  50
  51                 virtual int decrypt(void *block, int len);
  52
  53         private:
  54                 BlockCipher *_cipher;
  55                 void *_register;
  56                 void *_next;
  57                 int _len;
  58                 int _reader, _writer;
  59
  60 };
  61
  62 #endif