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authorChristophe Grenier <grenier@cgsecurity.org>2008-06-01 17:28:19 +0200
committerChristophe Grenier <grenier@cgsecurity.org>2008-06-01 17:28:19 +0200
commitce4ccdf9679a48372304923019403f3afa74be79 (patch)
tree7ee7c0cf722208449561e2fc24ee691f72b76f95 /src/file_ds2.c
parent68a7ac1d3915b22a8d44355809721b456d39d147 (diff)
PhotoRec: recover Digital Speech Standard v2 .ds2 files
Diffstat (limited to 'src/file_ds2.c')
-rw-r--r--src/file_ds2.c89
1 files changed, 89 insertions, 0 deletions
diff --git a/src/file_ds2.c b/src/file_ds2.c
new file mode 100644
index 0000000..1bbc94a
--- /dev/null
+++ b/src/file_ds2.c
@@ -0,0 +1,89 @@
+/*
+
+ File: file_ds2.c
+
+ Copyright (C) 2008 Christophe GRENIER <grenier@cgsecurity.org>
+
+ This software is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License along
+ with this program; if not, write the Free Software Foundation, Inc., 51
+ Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+ */
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+#ifdef HAVE_TIME_H
+#include <time.h>
+#endif
+#include <stdio.h>
+#include "types.h"
+#include "filegen.h"
+#include "log.h"
+
+static void register_header_check_ds2(file_stat_t *file_stat);
+static int header_check_ds2(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);
+
+const file_hint_t file_hint_ds2= {
+ .extension="ds2",
+ .description="Digital Speech Standard v2",
+ .min_header_distance=0,
+ .max_filesize=PHOTOREC_MAX_FILE_SIZE,
+ .recover=1,
+ .enable_by_default=1,
+ .register_header_check=&register_header_check_ds2
+};
+
+static const unsigned char ds2_header[4]= { 0x03, 'd','s','2'};
+/*
+ Digital Speech Standard (.ds2) is a digital speech recording format
+ that is an evolution from dss standard which was jointly developed
+ and introduced by Olympus, Grundig and Phillips in 1994.
+ 0x00 char magic[4];
+ 0x26 char create_date[12];
+ 0x32 char complete_date[12];
+
+ Filesize is always a multiple of 512
+*/
+
+static void register_header_check_ds2(file_stat_t *file_stat)
+{
+ register_header_check(0, ds2_header,sizeof(ds2_header), &header_check_ds2, file_stat);
+}
+
+static int header_check_ds2(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)
+{
+ if(memcmp(buffer,ds2_header,sizeof(ds2_header))==0)
+ {
+ struct tm tm_time;
+ const unsigned char *date_asc=&buffer[0x26];
+ reset_file_recovery(file_recovery_new);
+ file_recovery_new->extension=file_hint_ds2.extension;
+ file_recovery_new->min_filesize=0x200;
+ memset(&tm_time, 0, sizeof(tm_time));
+ tm_time.tm_sec=(date_asc[10]-'0')*10+(date_asc[11]-'0'); /* seconds 0-59 */
+ tm_time.tm_min=(date_asc[8]-'0')*10+(date_asc[9]-'0'); /* minutes 0-59 */
+ tm_time.tm_hour=(date_asc[6]-'0')*10+(date_asc[7]-'0'); /* hours 0-23*/
+ tm_time.tm_mday=(date_asc[4]-'0')*10+(date_asc[5]-'0'); /* day of the month 1-31 */
+ tm_time.tm_mon=(date_asc[2]-'0')*10+(date_asc[3]-'0')-1; /* month 1-12 */
+ tm_time.tm_year=(date_asc[0]-'0')*10+(date_asc[1]-'0'); /* year */
+ if(tm_time.tm_year<80)
+ tm_time.tm_year+=100; /* year 2000 - 2079 */
+ tm_time.tm_isdst=-1; /* unknown daylight saving time */
+ file_recovery_new->time=mktime(&tm_time);
+ return 1;
+ }
+ return 0;
+}