80 lines
2.7 KiB
C
80 lines
2.7 KiB
C
/*
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File: file_edb.c
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Copyright (C) 2009 Christophe GRENIER <grenier@cgsecurity.org>
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This software is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write the Free Software Foundation, Inc., 51
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Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#if !defined(SINGLE_FORMAT) || defined(SINGLE_FORMAT_edb)
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif
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#include <stdio.h>
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#include "types.h"
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#include "common.h"
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#include "filegen.h"
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/*@ requires \valid(file_stat); */
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static void register_header_check_edb(file_stat_t *file_stat);
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const file_hint_t file_hint_edb= {
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.extension="edb",
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.description="Exchange Database",
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.max_filesize=PHOTOREC_MAX_FILE_SIZE,
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.recover=1,
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.enable_by_default=1,
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.register_header_check=®ister_header_check_edb
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};
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/*@
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@ requires buffer_size > 0;
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@ requires \valid_read(buffer+(0..buffer_size-1));
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@ requires valid_file_recovery(file_recovery);
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@ requires \valid(file_recovery_new);
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@ requires file_recovery_new->blocksize > 0;
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@ requires separation: \separated(&file_hint_edb, buffer+(..), file_recovery, file_recovery_new);
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@ assigns *file_recovery_new;
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@ ensures \result == 0 || \result == 1;
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@ ensures \result!=0 ==> valid_file_recovery(file_recovery_new);
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@*/
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static int header_check_edb(const unsigned char *buffer, const unsigned int buffer_size, const unsigned int safe_header_only, const file_recovery_t *file_recovery, file_recovery_t *file_recovery_new)
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{
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/* A backup of the header is stored in the second block */
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if(file_recovery->file_stat!=NULL &&
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file_recovery->file_stat->file_hint==&file_hint_edb &&
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file_recovery->file_size==4096)
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{
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/* header_ignored(file_recovery_new); is useless as there is no file check */
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return 0;
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}
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reset_file_recovery(file_recovery_new);
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file_recovery_new->extension=file_hint_edb.extension;
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return 1;
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}
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static void register_header_check_edb(file_stat_t *file_stat)
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{
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static const unsigned char edb_magic[8]= {
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0xef, 0xcd, 0xab, 0x89, 0x20, 0x06, 0x00, 0x00
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};
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register_header_check(4, edb_magic, sizeof(edb_magic), &header_check_edb, file_stat);
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}
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#endif
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