CryptedInputStream.h
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00001 /***************************************************************************** 00002 * Copyright (C) 2011 by Benjamin Hadorn (b_hadorn@bluewin.ch) 00003 ***************************************************************************** 00004 * Project : Zeus Base Library 00005 * Module : CryptedInputStream 00006 * Package : Zeus.ZeusBase.Security 00007 * Author : Benjamin Hadorn 00008 * Date : 27.12.2011 00009 * System : Zeus-Framework 00010 ***************************************************************************** 00011 * Licence: * 00012 * This library is free software; you can redistribute it and/or modify * 00013 * it under the terms of the GNU Lesser General Public License as * 00014 * published by the Free Software Foundation; either version * 00015 * 2.1 of the License, or (at your option) any later version. * 00016 * * 00017 * This library is distributed in the hope that it will be useful, * 00018 * but WITHOUT ANY WARRANTY; without even the implied warranty of * 00019 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * 00020 * GNU Lesser General Public License for more details. * 00021 * * 00022 * You should have received a copy of the GNU Lesser General Public * 00023 * License along with this library; if not, write to the Free Software * 00024 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110, USA * 00025 *****************************************************************************/ 00026 00027 /***************************************************************************** 00028 * Changes: 00029 * 27.12.2011 bha: created zeus 2.0 00030 *****************************************************************************/ 00031 00032 #ifndef CryptedInputStreamH 00033 #define CryptedInputStreamH 00034 00035 #include <zeusbase/System/FilterInputStream.h> 00036 #include <zeusbase/System/ByteArray.hpp> 00037 #include <zeusbase/Security/SecurityDefines.hpp> 00038 00039 BEGIN_NAMESPACE_Zeus 00040 00041 class TAbstractCrypter; 00042 00043 /***************************************************************************/ 00047 /***************************************************************************/ 00048 zeusbase_class TCryptedInputStream : public TFilterInputStream 00049 { 00050 public: 00051 TCryptedInputStream(IInputStream& rParentStream, ECryptType eType); 00052 00053 virtual Retval MQUALIFIER read(char* pBuffer, Int iBufferSize, Int& rValidSize) const; 00054 virtual Int MQUALIFIER readItem() const; 00055 virtual void MQUALIFIER reset(); 00056 00057 void setKey(Uint64 uldKey); 00058 void setKey(const IByteArray& rKey); 00059 00060 protected: 00061 virtual ~TCryptedInputStream(); 00062 00063 private: 00064 static TAbstractCrypter& getCryptingObject(ECryptType eType); 00066 TAbstractCrypter& m_rCrypting; 00068 mutable TByteArray m_aBufferedData; 00070 mutable Int m_iDataIndex; 00071 }; 00072 00073 /***************************************************************************/ 00076 /***************************************************************************/ 00077 inline Retval MQUALIFIER TCryptedInputStream::read(char* pBuffer, Int iBufferSize, Int& rValidSize) const 00078 { 00079 return delegateReadBlockToReadItem(pBuffer, iBufferSize, rValidSize); 00080 } 00081 00082 /***************************************************************************/ 00085 /***************************************************************************/ 00086 inline void MQUALIFIER TCryptedInputStream::reset() 00087 { 00088 m_aBufferedData.clear(); 00089 m_iDataIndex = 0; 00090 TFilterInputStream::reset(); 00091 } 00092 00093 00094 END_NAMESPACE_Zeus 00095 00096 00097 #endif