runtime/kwalletd/backend/blowfish.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 #ifndef _BLOWFISH_H
  21 #define _BLOWFISH_H
  22
  23 #include <config-kwalletbackend.h>
  24
  25 #ifdef HAVE_STDINT_H
  26 #include <stdint.h>
  27 #endif
  28 #include <sys/types.h>
  29 #ifdef HAVE_SYS_BITYPES_H
  30 #include <sys/bitypes.h> /* For uintXX_t on Tru64 */
  31 #endif
  32
  33 #include "blockcipher.h"
  34 #include <kwallet_export.h>
  35
  36 /* @internal
  37  */
  38 class KWALLETBACKEND_EXPORT BlowFish : public BlockCipher {
  39         public:
  40                 BlowFish();
  41                 virtual ~BlowFish();
  42
  43                 virtual bool setKey(void *key, int bitlength);
  44
  45                 virtual int keyLen() const;
  46
  47                 virtual bool variableKeyLen() const;
  48
  49                 virtual bool readyToGo() const;
  50
  51                 virtual int encrypt(void *block, int len);
  52
  53                 virtual int decrypt(void *block, int len);
  54
  55         private:
  56                 uint32_t _S[4][256];
  57                 uint32_t _P[18];
  58
  59                 void *_key;
  60                 int _keylen;  // in bits
  61
  62                 bool _init;
  63
  64                 bool init();
  65                 uint32_t F(uint32_t x);
  66                 void encipher(uint32_t *xl, uint32_t *xr);
  67                 void decipher(uint32_t *xl, uint32_t *xr);
  68 };
  69
  70 #endif
  71