Disk ARchive
2.4.5
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00001 /*********************************************************************/ 00002 // dar - disk archive - a backup/restoration program 00003 // Copyright (C) 2002-2052 Denis Corbin 00004 // 00005 // This program is free software; you can redistribute it and/or 00006 // modify it under the terms of the GNU General Public License 00007 // as published by the Free Software Foundation; either version 2 00008 // of the License, or (at your option) any later version. 00009 // 00010 // This program is distributed in the hope that it will be useful, 00011 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00012 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00013 // GNU General Public License for more details. 00014 // 00015 // You should have received a copy of the GNU General Public License 00016 // along with this program; if not, write to the Free Software 00017 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 00018 // 00019 // to contact the author : dar.linux@free.fr 00020 /*********************************************************************/ 00021 // $Id$ 00022 // 00023 /*********************************************************************/ 00024 00025 #ifndef SCRAMBLER_HPP 00026 #define SCRAMBLER_HPP 00027 00028 #include "generic_file.hpp" 00029 #include "erreurs.hpp" 00030 #include "infinint.hpp" 00031 00032 class scrambler : public generic_file 00033 { 00034 public: 00035 scrambler(const string & pass, generic_file & hidden_side); 00036 ~scrambler() { if(buffer != NULL) delete buffer; }; 00037 00038 bool skip(const infinint & pos) { if(ref == NULL) throw SRC_BUG; return ref->skip(pos); }; 00039 bool skip_to_eof() { if(ref==NULL) throw SRC_BUG; return ref->skip_to_eof(); }; 00040 bool skip_relative(S_I x) { if(ref == NULL) throw SRC_BUG; return ref->skip_relative(x); }; 00041 infinint get_position() { if(ref == NULL) throw SRC_BUG; return ref->get_position(); }; 00042 00043 protected: 00044 S_I inherited_read(char *a, size_t size); 00045 S_I inherited_write(char *a, size_t size); 00046 00047 private: 00048 string key; 00049 U_32 len; 00050 generic_file *ref; 00051 unsigned char *buffer; 00052 size_t buf_size; 00053 }; 00054 00055 #endif