91 lines
3.1 KiB
C
91 lines
3.1 KiB
C
/*
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File: file_dss.c
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Copyright (C) 2008 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_dss)
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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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#ifdef HAVE_TIME_H
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#include <time.h>
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#endif
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#include <stdio.h>
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#include <ctype.h>
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#include "types.h"
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#include "filegen.h"
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/*@ requires valid_register_header_check(file_stat); */
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static void register_header_check_dss(file_stat_t *file_stat);
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const file_hint_t file_hint_dss = {
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.extension = "dss",
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.description = "Digital Speech Standard",
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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_dss
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};
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/*
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Digital Speech Standard (.dss) is a digital speech recording standard
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which was jointly developed and introduced by Olympus, Grundig and
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Phillips in 1994.
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0x00 char magic[4];
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0x26 char create_date[12];
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0x32 char complete_date[12];
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0x3e char length[6];
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0x31e char comments[100];
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Filesize is always a multiple of 512
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*/
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/*@
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@ requires buffer_size >= 0x26+24;
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@ requires separation: \separated(&file_hint_dss, buffer+(..), file_recovery, file_recovery_new);
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@ requires valid_header_check_param(buffer, buffer_size, safe_header_only, file_recovery, file_recovery_new);
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@ ensures valid_header_check_result(\result, file_recovery_new);
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@ assigns *file_recovery_new;
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@*/
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static int header_check_dss(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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const unsigned char *udate_asc = (const unsigned char *)&buffer[0x26];
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const char *date_asc = (const char *)&buffer[0x26];
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unsigned int i;
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/*@ loop assigns i; */
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for(i = 0; i < 24; i++)
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if(!isdigit(udate_asc[i]))
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return 0;
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reset_file_recovery(file_recovery_new);
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file_recovery_new->extension = file_hint_dss.extension;
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/* File should be big enough to hold the comments */
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file_recovery_new->min_filesize = 1024;
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file_recovery_new->time = get_time_from_YYMMDDHHMMSS(date_asc);
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return 1;
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}
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static void register_header_check_dss(file_stat_t *file_stat)
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{
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static const unsigned char dss_header[4] = { 0x02, 'd', 's', 's' };
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register_header_check(0, dss_header, sizeof(dss_header), &header_check_dss, file_stat);
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}
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#endif
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