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/*
File: file_vmdk.c
Copyright (C) 2007 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_vmdk(file_stat_t *file_stat);
static int header_check_vmdk(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_vmdk= {
.extension="vmdk",
.description="VMWare",
.min_header_distance=0,
.max_filesize=(uint64_t)2048*1024*1024*1024,
.recover=1,
.header_check=&header_check_vmdk,
.register_header_check=®ister_header_check_vmdk
};
static const unsigned char vmdk_header4[4]= { 'K','D','M','V'};
static const unsigned char vmdk_header3[4]= { 'C','O','W','D'};
typedef struct {
uint32_t version;
uint32_t flags;
uint32_t disk_sectors;
uint32_t granularity;
uint32_t l1dir_offset;
uint32_t l1dir_size;
uint32_t file_sectors;
uint32_t cylinders;
uint32_t heads;
uint32_t sectors_per_track;
} VMDK3Header;
typedef struct {
uint32_t version;
uint32_t flags;
int64_t capacity;
int64_t granularity;
int64_t desc_offset;
int64_t desc_size;
int32_t num_gtes_per_gte;
int64_t rgd_offset;
int64_t gd_offset;
int64_t grain_offset;
char filler[1];
char check_bytes[4];
} __attribute__((packed)) VMDK4Header;
static void register_header_check_vmdk(file_stat_t *file_stat)
{
register_header_check(0, vmdk_header3,sizeof(vmdk_header3), &header_check_vmdk, file_stat);
register_header_check(0, vmdk_header4,sizeof(vmdk_header4), &header_check_vmdk, file_stat);
}
static int header_check_vmdk(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,vmdk_header3, sizeof(vmdk_header3))==0 ||
memcmp(buffer,vmdk_header4, sizeof(vmdk_header4))==0)
{
reset_file_recovery(file_recovery_new);
file_recovery_new->extension=file_hint_vmdk.extension;
return 1;
}
return 0;
}
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