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authorChristophe Grenier <grenier@cgsecurity.org>2012-08-09 13:08:23 +0200
committerChristophe Grenier <grenier@cgsecurity.org>2012-08-09 13:08:23 +0200
commita0f10fb81fbfd5c7628b522e4446d97ea3e46350 (patch)
treef3c700d91f8f7922751c6ea52de123cda828c580 /src/file_xz.c
parent5c5f3c68450732370248085178dfde00d3688983 (diff)
PhotoRec: recover .xz compressed archive
Diffstat (limited to 'src/file_xz.c')
-rw-r--r--src/file_xz.c72
1 files changed, 72 insertions, 0 deletions
diff --git a/src/file_xz.c b/src/file_xz.c
new file mode 100644
index 0000000..37700d8
--- /dev/null
+++ b/src/file_xz.c
@@ -0,0 +1,72 @@
+/*
+
+ File: file_xz.c
+
+ Copyright (C) 2012 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
+#include <stdio.h>
+#include "types.h"
+#include "filegen.h"
+
+static void register_header_check_xz(file_stat_t *file_stat);
+
+const file_hint_t file_hint_xz= {
+ .extension="xz",
+ .description="xz Archive",
+ .min_header_distance=0,
+ .max_filesize=PHOTOREC_MAX_FILE_SIZE,
+ .recover=1,
+ .enable_by_default=1,
+ .register_header_check=&register_header_check_xz
+};
+
+static void file_check_xz(file_recovery_t *file_recovery)
+{
+ const unsigned char xz_footer[2]= { 'Y' , 'Z' };
+ file_search_footer(file_recovery, xz_footer, sizeof(xz_footer), 0);
+}
+
+/* http://tukaani.org/xz/xz-file-format.txt */
+/* HEADER_MAGIC + Stream Flag[0] */
+static const unsigned char xz_header[7]= {
+ 0xfd, '7' , 'z' , 'X' , 'Z' , 0x00, 0x00
+};
+
+static int header_check_xz(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[0], xz_header, sizeof(xz_header))==0)
+ {
+ reset_file_recovery(file_recovery_new);
+ file_recovery_new->extension=file_hint_xz.extension;
+ file_recovery_new->file_check=&file_check_xz;
+ return 1;
+ }
+ return 0;
+}
+
+static void register_header_check_xz(file_stat_t *file_stat)
+{
+ register_header_check(0, xz_header, sizeof(xz_header), &header_check_xz, file_stat);
+}