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authorChristophe Grenier <grenier@cgsecurity.org>2010-07-23 08:55:16 +0200
committerChristophe Grenier <grenier@cgsecurity.org>2010-07-23 08:55:16 +0200
commitfd3025598e6b252a41cfccdc024de9651ff3df2e (patch)
tree44ee57afaad61cf1935a821023cbf3f1a480f22b /src/file_vdi.c
parent431dc0ed086e7f05d7ae9f2af3a1b33db2e80617 (diff)
PhotoRec: recover Virtual desktop infrastructure 1.1 .vdi files
Diffstat (limited to 'src/file_vdi.c')
-rw-r--r--src/file_vdi.c106
1 files changed, 106 insertions, 0 deletions
diff --git a/src/file_vdi.c b/src/file_vdi.c
new file mode 100644
index 0000000..06ad421
--- /dev/null
+++ b/src/file_vdi.c
@@ -0,0 +1,106 @@
+/*
+
+ File: file_vdi.c
+
+ Copyright (C) 2010 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"
+#include "common.h"
+
+static void register_header_check_vdi(file_stat_t *file_stat);
+static int header_check_vdi(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_vdi= {
+ .extension="vdi",
+ .description="Virtual desktop infrastructure 1.1",
+ .min_header_distance=0,
+ .max_filesize=PHOTOREC_MAX_FILE_SIZE,
+ .recover=1,
+ .enable_by_default=1,
+ .register_header_check=&register_header_check_vdi
+};
+
+static const unsigned char vdi_header[4]= {0x7f, 0x10, 0xda, 0xbe};
+
+static void register_header_check_vdi(file_stat_t *file_stat)
+{
+ register_header_check(0x40, vdi_header,sizeof(vdi_header), &header_check_vdi, file_stat);
+}
+
+/* Image version. */
+#define VDI_VERSION_1_1 0x00010001
+
+/* Image type. */
+#define VDI_TYPE_DYNAMIC 1
+#define VDI_TYPE_STATIC 2
+
+typedef unsigned char uuid_t[16];
+
+typedef struct {
+ char text[0x40];
+ uint32_t signature;
+ uint32_t version;
+ uint32_t header_size;
+ uint32_t image_type;
+ uint32_t image_flags;
+ char description[256];
+ uint32_t offset_bmap;
+ uint32_t offset_data;
+ uint32_t cylinders; /* disk geometry, unused here */
+ uint32_t heads; /* disk geometry, unused here */
+ uint32_t sectors; /* disk geometry, unused here */
+ uint32_t sector_size;
+ uint32_t unused1;
+ uint64_t disk_size;
+ uint32_t block_size;
+ uint32_t block_extra; /* unused here */
+ uint32_t blocks_in_image;
+ uint32_t blocks_allocated;
+ uuid_t uuid_image;
+ uuid_t uuid_last_snap;
+ uuid_t uuid_link;
+ uuid_t uuid_parent;
+ uint64_t unused2[7];
+} VdiHeader;
+
+static int header_check_vdi(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 VdiHeader *header=(const VdiHeader *)buffer;
+ if(memcmp(&buffer[0x40], vdi_header, sizeof(vdi_header))==0 && le32(header->version) == VDI_VERSION_1_1)
+ {
+ reset_file_recovery(file_recovery_new);
+ file_recovery_new->extension=file_hint_vdi.extension;
+ if(le32(header->image_type) == VDI_TYPE_STATIC)
+ {
+ file_recovery_new->calculated_file_size=(uint64_t) le32(header->offset_data) + le32(header->blocks_in_image) * le32(header->block_size);
+ file_recovery_new->data_check=&data_check_size;
+ file_recovery_new->file_check=&file_check_size;
+ }
+ return 1;
+ }
+ return 0;
+}