68 lines
2.5 KiB
C
68 lines
2.5 KiB
C
/*
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File: file_dbf.c
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Copyright (C) 2006-2007 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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#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 "filegen.h"
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static void register_header_check_dbf(file_stat_t *file_stat);
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static int header_check_dbf(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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const file_hint_t file_hint_dbf= {
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.extension="dbf",
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.description="DBase 3, prone to false positive",
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.max_filesize=PHOTOREC_MAX_FILE_SIZE,
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.recover=1,
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.enable_by_default=0,
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.register_header_check=®ister_header_check_dbf
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};
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static const unsigned char dbf_header[1]= {0x3};
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static void register_header_check_dbf(file_stat_t *file_stat)
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{
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register_header_check(0, dbf_header,sizeof(dbf_header), &header_check_dbf, file_stat);
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}
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static int header_check_dbf(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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/* 0x03 YY MM DD reserved=0 */
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if(buffer[0]==0x3 && ((buffer[1]>80 && buffer[1]<120) || buffer[1]<20) &&
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(buffer[2]>=1 && buffer[2]<=12) && (buffer[3]>=1 && buffer[3]<=31) &&
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buffer[12]==0 && buffer[13]==0 && buffer[14]==0 && buffer[15]==0 &&
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buffer[16]==0 && buffer[17]==0 && buffer[18]==0 && buffer[19]==0 &&
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buffer[20]==0 && buffer[21]==0 && buffer[22]==0 && buffer[23]==0 &&
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buffer[24]==0 && buffer[25]==0 && buffer[26]==0 && buffer[27]==0 &&
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buffer[30]==0 && buffer[31]==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_dbf.extension;
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return 1;
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}
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return 0;
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}
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