WPXEncryption.h
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00001 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */
00002 /* libwpd
00003  * Version: MPL 2.0 / LGPLv2.1+
00004  *
00005  * This Source Code Form is subject to the terms of the Mozilla Public
00006  * License, v. 2.0. If a copy of the MPL was not distributed with this
00007  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
00008  *
00009  * Major Contributor(s):
00010  * Copyright (C) 2007 Jaroslav Fojtik (JaFojtik@seznam.cz)
00011  * Copyright (C) 2007 Fridrich Strba (fridrich.strba@bluewin.ch)
00012  *
00013  * For minor contributions see the git repository.
00014  *
00015  * Alternatively, the contents of this file may be used under the terms
00016  * of the GNU Lesser General Public License Version 2.1 or later
00017  * (LGPLv2.1+), in which case the provisions of the LGPLv2.1+ are
00018  * applicable instead of those above.
00019  *
00020  * For further information visit http://libwpd.sourceforge.net
00021  */
00022 
00023 /* "This product is not manufactured, approved, or supported by
00024  * Corel Corporation or Corel Corporation Limited."
00025  */
00026 
00027 #ifndef WPXENCRYPTION_H
00028 #define WPXENCRYPTION_H
00029 
00030 #include "libwpd_types.h"
00031 #include "WPXString.h"
00032 
00033 class WPXInputStream;
00034 
00035 class WPXEncryption
00036 {
00037 public:
00038         WPXEncryption(const char *password, const unsigned long encryptionStartOffset = 0);
00039         ~WPXEncryption();
00040 
00041         const unsigned char *readAndDecrypt(WPXInputStream *input, unsigned long numBytes, unsigned long &numBytesRead);
00042         uint16_t getCheckSum() const;
00043 
00044         void setEncryptionStartOffset(unsigned long encryptionStartOffset)
00045         {
00046                 m_encryptionStartOffset = encryptionStartOffset;
00047         }
00048         unsigned long getEncryptionStartOffset() const
00049         {
00050                 return m_encryptionStartOffset;
00051         }
00052 
00053         void setEncryptionMaskBase(unsigned char encryptionMaskBase)
00054         {
00055                 m_encryptionMaskBase = encryptionMaskBase;
00056         }
00057         unsigned char getEncryptionMaskBase() const
00058         {
00059                 return m_encryptionMaskBase;
00060         }
00061 
00062         const WPXString &getEncryptionPassword() const
00063         {
00064                 return m_password;
00065         }
00066 
00067 private:
00068         unsigned char *m_buffer;
00069         WPXString m_password;
00070         unsigned long m_encryptionStartOffset;
00071         unsigned char m_encryptionMaskBase;
00072         // Unimplemented to prevent compiler from creating crasher ones
00073         WPXEncryption(const WPXEncryption &);
00074         WPXEncryption &operator=(const WPXEncryption &);
00075 };
00076 
00077 #endif /* WPXENCRYPTION_H */
00078 /* vim:set shiftwidth=4 softtabstop=4 noexpandtab: */