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|
/*
* The Sleuth Kit
*
* Brian Carrier [carrier <at> sleuthkit [dot] org]
* Copyright (c) 2006-2011 Brian Carrier, Basis Technology. All rights reserved
* Copyright (c) 2003-2005 Brian Carrier. All rights reserved
*
* This software is distributed under the Common Public License 1.0
*/
/** \file dos.c
* Contains the internal functions to process DOS Partition tables
*/
#include "tsk_vs_i.h"
#include "tsk_dos.h"
/* Check the extended partition flags */
#define dos_is_ext(x) \
((((x) == 0x05) || ((x) == 0x0F) || ((x) == 0x85)) ? 1 : 0)
/*
* dos_get_desc
*
* Return a buffer with a string description of the partition type
*
* From: http://www.win.tue.nl/~aeb/partitions/partition_types-1.html
*/
static char *
dos_get_desc(uint8_t ptype)
{
#define DESC_LEN 64
char *str = tsk_malloc(DESC_LEN);
if (str == NULL)
return "";
switch (ptype) {
case 0x00:
snprintf(str, DESC_LEN, "Empty (0x00)");
break;
case 0x01:
snprintf(str, DESC_LEN, "DOS FAT12 (0x01)");
break;
case 0x02:
snprintf(str, DESC_LEN, "XENIX root (0x02)");
break;
case 0x03:
snprintf(str, DESC_LEN, "XENIX /usr (0x03)");
break;
case 0x04:
case 0x06:
snprintf(str, DESC_LEN, "DOS FAT16 (0x%.2x)", ptype);
break;
case 0x05:
snprintf(str, DESC_LEN, "DOS Extended (0x05)");
break;
case 0x07:
snprintf(str, DESC_LEN, "NTFS / exFAT (0x07)");
break;
case 0x08:
snprintf(str, DESC_LEN, "AIX Boot (0x08)");
break;
case 0x09:
snprintf(str, DESC_LEN, "AIX Data (0x09)");
break;
case 0x0a:
snprintf(str, DESC_LEN, "OS/2 Boot Manager (0x0a)");
break;
/*
case 0x0a:
snprintf(str, DESC_LEN, "Coherent swap (0x0a)");
break;
case 0x0a:
snprintf(str, DESC_LEN, "OPUS (0x0a)");
break;
*/
case 0x0b:
case 0x0c:
snprintf(str, DESC_LEN, "Win95 FAT32 (0x%.2x)", ptype);
break;
case 0x0e:
snprintf(str, DESC_LEN, "Win95 FAT16 (0x0e)");
break;
case 0x0f:
snprintf(str, DESC_LEN, "Win95 Extended (0x0f)");
break;
case 0x10:
snprintf(str, DESC_LEN, "OPUS (0x10)");
break;
case 0x11:
snprintf(str, DESC_LEN, "DOS FAT12 Hidden (0x11)");
break;
case 0x12:
snprintf(str, DESC_LEN, "Hibernation (0x12)");
break;
case 0x14:
case 0x16:
snprintf(str, DESC_LEN, "DOS FAT16 Hidden (0x%.2x)", ptype);
break;
case 0x17:
snprintf(str, DESC_LEN, "Hidden IFS/HPFS (0x17)");
break;
case 0x18:
snprintf(str, DESC_LEN, "AST SmartSleep (0x18)");
break;
case 0x19:
case 0x1b:
case 0x1c:
snprintf(str, DESC_LEN, "Win95 FAT32 Hidden (0x%.2x)", ptype);
break;
case 0x1e:
snprintf(str, DESC_LEN, "Win95 FAT16 Hidden (0x1e)");
break;
case 0x20:
case 0x22:
case 0x7e:
case 0x7f:
case 0xed:
case 0xf7:
snprintf(str, DESC_LEN, "Unused (0x%.2x)", ptype);
break;
case 0x21:
case 0x23:
case 0x26:
case 0x31:
case 0x33:
case 0x34:
case 0x36:
case 0x71:
case 0x73:
case 0x76:
case 0xf3:
snprintf(str, DESC_LEN, "Reserved (0x%.2x)", ptype);
break;
case 0x24:
snprintf(str, DESC_LEN, "NEC DOS 3.x (0x24)");
break;
case 0x32:
snprintf(str, DESC_LEN, "NOS (0x32)");
break;
case 0x35:
snprintf(str, DESC_LEN, "JFS on OS/2 or eCS (0x35)");
break;
case 0x38:
snprintf(str, DESC_LEN, "THEOS v3.2 2gb (0x38)");
break;
case 0x39:
snprintf(str, DESC_LEN, "THEOS v4 Spanned (0x39)");
break;
/*
case 0x39:
snprintf(str, DESC_LEN, "Plan 9 (0x39)");
break;
*/
case 0x3a:
snprintf(str, DESC_LEN, "THEOS v4 4gb (0x3a)");
break;
case 0x3b:
snprintf(str, DESC_LEN, "THEOS v4 Extended (0x3b)");
break;
case 0x3c:
snprintf(str, DESC_LEN, "PartitionMagic Recovery (0x3c)");
break;
case 0x3d:
snprintf(str, DESC_LEN, "Hidden NetWare (0x3d)");
break;
case 0x40:
snprintf(str, DESC_LEN, "Venix 80286 (0x40)");
break;
case 0x41:
snprintf(str, DESC_LEN,
"Linux/MINIX (Sharing Disk with DR-DOS) (0x41)");
break;
/*
case 0x41:
snprintf(str, DESC_LEN, "Personal RISC Boot (0x41)");
break;
case 0x41:
snprintf(str, DESC_LEN, "PPC PReP Boot (0x41)");
break;
*/
case 0x42:
snprintf(str, DESC_LEN, "Win LVM / Secure FS (0x42)");
break;
case 0x43:
snprintf(str, DESC_LEN,
"Linux Native (Sharing Disk with DR-DOS) (0x43)");
break;
case 0x44:
snprintf(str, DESC_LEN, "GoBack (0x44)");
break;
case 0x45:
snprintf(str, DESC_LEN, "Boot-US Boot Manager (0x45)");
break;
/*
case 0x45:
snprintf(str, DESC_LEN, "Priam (0x45)");
break;
case 0x45:
snprintf(str, DESC_LEN, "EUMEL/Elan (0x45)");
break;
*/
case 0x46:
snprintf(str, DESC_LEN, "EUMEL/Elan (0x46)");
break;
case 0x47:
snprintf(str, DESC_LEN, "EUMEL/Elan (0x47)");
break;
case 0x48:
snprintf(str, DESC_LEN, "EUMEL/Elan (0x48)");
break;
case 0x4a:
snprintf(str, DESC_LEN,
"Mark Aitchison's ALFS/THIN Lightweight Filesystem (0x4a)");
break;
/*case 0x4a:
snprintf(str, DESC_LEN, "AdaOS Aquila (0x4a)");
break; */
case 0x4c:
snprintf(str, DESC_LEN, "Oberon (0x4c)");
break;
case 0x4d:
case 0x4e:
case 0x4f:
snprintf(str, DESC_LEN, "QNX 4.x (0x%.2x)", ptype);
break;
/*case 0x4f:
snprintf(str, DESC_LEN, "Oberon (0x4f)");
break; */
/*case 0x52:
snprintf(str, DESC_LEN, "CP/M (0x52)");
break; */
case 0x50:
case 0x51:
case 0x53:
case 0x54:
snprintf(str, DESC_LEN, "OnTrack Disk Manager (0x%.2x)", ptype);
break;
case 0x52:
snprintf(str, DESC_LEN, "Microport SysV/AT (0x52)");
break;
case 0x55:
snprintf(str, DESC_LEN, "EZ-Drive (0x55)");
break;
case 0x56:
snprintf(str, DESC_LEN,
"AT&T MS-DOS 3.x Logically Sectored FAT (0x56)");
break;
/*case 0x56:
snprintf(str, DESC_LEN, "Golden Bow VFeature Partitioned Volume (0x56)");
break; */
/*case 0x56:
snprintf(str, DESC_LEN, "DM Converted to EZ-BIOS (0x56)");
break; */
case 0x57:
snprintf(str, DESC_LEN, "DrivePro (0x57)");
break;
case 0x5c:
snprintf(str, DESC_LEN, "Priam EDisk (0x5c)");
break;
case 0x61:
snprintf(str, DESC_LEN, "SpeedStor (0x61)");
break;
case 0x63:
snprintf(str, DESC_LEN, "UNIX System V (0x63)");
break;
case 0x64:
case 0x65:
case 0x66:
case 0x67:
case 0x68:
case 0x69:
snprintf(str, DESC_LEN, "Novell Netware (0x%.2x)", ptype);
break;
case 0x70:
snprintf(str, DESC_LEN, "DiskSecure Multi-Boot (0x70)");
break;
case 0x74:
snprintf(str, DESC_LEN, "Scramdisk (0x74)");
break;
case 0x75:
snprintf(str, DESC_LEN, "IBM PC/IX (0x75)");
break;
case 0x77:
snprintf(str, DESC_LEN, "VNDI (0x77)");
break;
/*case 0x77:
snprintf(str, DESC_LEN, "M2FS/M2CS (0x77)");
break; */
case 0x78:
snprintf(str, DESC_LEN, "XOSL FS (0x78)");
break;
case 0x80:
snprintf(str, DESC_LEN, "MINIX <=v1.4a (0x80)");
break;
case 0x81:
snprintf(str, DESC_LEN, "MINIX >=v1.4b, Early Linux (0x81)");
break;
/*case 0x81:
snprintf(str, DESC_LEN, "Mitac Disk Manager (0x81)");
break; */
case 0x82:
snprintf(str, DESC_LEN, "Linux Swap / Solaris x86 (0x82)");
break;
case 0x83:
snprintf(str, DESC_LEN, "Linux (0x83)");
break;
case 0x84:
snprintf(str, DESC_LEN, "Hibernation (0x84)");
break;
case 0x85:
snprintf(str, DESC_LEN, "Linux Extended (0x85)");
break;
case 0x86:
snprintf(str, DESC_LEN, "NTFS Volume Set (0x86)");
break;
case 0x87:
snprintf(str, DESC_LEN, "NTFS Volume Set (0x87)");
break;
case 0x8a:
snprintf(str, DESC_LEN, "Linux Kernel (0x8a)");
break;
case 0x8b:
snprintf(str, DESC_LEN, "Legacy Fault Tolerant FAT32 (0x8b)");
break;
case 0x8c:
snprintf(str, DESC_LEN,
"Legacy Fault Tolerant FAT32 using BIOS extd INT 13h (0x8c)");
break;
case 0x8d:
snprintf(str, DESC_LEN,
"Free FDISK Hidden Primary DOS FAT12 (0x8d)");
break;
case 0x8e:
snprintf(str, DESC_LEN, "Linux Logical Volume Manager (0x8e)");
break;
case 0x90:
snprintf(str, DESC_LEN,
"Free FDISK Hidden Primary DOS FAT16 (0x90)");
break;
case 0x91:
snprintf(str, DESC_LEN, "Free FDISK Hidden DOS Extended (0x91)");
break;
case 0x92:
snprintf(str, DESC_LEN,
"Free FDISK Hidden Primary DOS Large FAT16 (0x92)");
break;
case 0x93:
snprintf(str, DESC_LEN, "Linux Hidden (0x93)");
break;
case 0x94:
snprintf(str, DESC_LEN, "Amoeba Bad Block Table (0x94)");
break;
case 0x95:
snprintf(str, DESC_LEN, "MIT EXOPC (0x95)");
break;
case 0x97:
snprintf(str, DESC_LEN,
"Free FDISK Hidden Primary DOS FAT32 (0x97)");
break;
case 0x98:
snprintf(str, DESC_LEN,
"Free FDISK Hidden Primary DOS FAT32 LBA (0x98)");
break;
/*case 0x98:
snprintf(str, DESC_LEN, "Datalight ROM-DOS Super-Boot (0x98)");
break; */
case 0x99:
snprintf(str, DESC_LEN, "DCE376 Logical Drive (0x99)");
break;
case 0x9a:
snprintf(str, DESC_LEN,
"Free FDISK Hidden Primary DOS FAT16 LBA (0x9a)");
break;
case 0x9b:
snprintf(str, DESC_LEN,
"Free FDISK Hidden DOS Extended LBA (0x9b)");
break;
case 0x9f:
snprintf(str, DESC_LEN, "BSD/OS (0x9f)");
break;
case 0xa0:
case 0xa1:
snprintf(str, DESC_LEN, "Hibernation (0x%.2x)", ptype);
break;
case 0xa3:
snprintf(str, DESC_LEN,
"HP Volume Expansion (SpeedStor Variant) (0xa3)");
break;
case 0xa4:
snprintf(str, DESC_LEN,
"HP Volume Expansion (SpeedStor Variant) (0xa4)");
break;
case 0xa5:
snprintf(str, DESC_LEN, "BSD/386, 386BSD, NetBSD, FreeBSD (0xa5)");
break;
case 0xa6:
snprintf(str, DESC_LEN, "OpenBSD (0xa6)");
break;
case 0xa7:
snprintf(str, DESC_LEN, "NeXTSTEP (0xa7)");
break;
case 0xa8:
snprintf(str, DESC_LEN, "Mac OS X (0xa8)");
break;
case 0xa9:
snprintf(str, DESC_LEN, "NetBSD (0xa9)");
break;
case 0xaa:
snprintf(str, DESC_LEN, "Olivetti Fat 12 1.44MB Service (0xaa)");
break;
case 0xab:
snprintf(str, DESC_LEN, "Mac OS X Boot Partition (0xab)");
break;
case 0xae:
snprintf(str, DESC_LEN, "ShagOS Filesystem (0xae)");
break;
case 0xaf:
snprintf(str, DESC_LEN, "Mac OS X HFS (0xaf)");
break;
case 0xb0:
snprintf(str, DESC_LEN, "BootStar Dummy (0xb0)");
break;
case 0xb1:
snprintf(str, DESC_LEN,
"HP Volume Expansion (SpeedStor Variant) (0xb1)");
break;
case 0xb3:
snprintf(str, DESC_LEN,
"HP Volume Expansion (SpeedStor Variant) (0xb3)");
break;
case 0xb4:
snprintf(str, DESC_LEN,
"HP Volume Expansion (SpeedStor Variant) (0xb4)");
break;
case 0xb6:
snprintf(str, DESC_LEN,
"Corrupted Windows NT Mirror Set Master FAT16 (0xb6)");
break;
/*case 0xb6:
snprintf(str, DESC_LEN, "HP Volume Expansion (SpeedStor Variant) (0xb6)");
break; */
case 0xb7:
snprintf(str, DESC_LEN, "BSDI (0xb7)");
break;
case 0xb8:
snprintf(str, DESC_LEN, "BSDI Swap (0xb8)");
break;
case 0xbb:
snprintf(str, DESC_LEN, "Boot Wizard Hidden (0xbb)");
break;
case 0xbe:
snprintf(str, DESC_LEN, "Solaris 8 Boot (0xbe)");
break;
case 0xc0:
snprintf(str, DESC_LEN, "DR-DOS Secured (0xc0)");
break;
/*case 0xc0:
snprintf(str, DESC_LEN, "CTOS (0xc0)");
break; */
/*case 0xc0:
snprintf(str, DESC_LEN, "REAL/32 Secure Small (0xc0)");
break; */
/*case 0xc0:
snprintf(str, DESC_LEN, "NTFT (0xc0)");
break; */
case 0xc1:
snprintf(str, DESC_LEN, "DR-DOS Secured FAT12 (0xc1)");
break;
case 0xc2:
snprintf(str, DESC_LEN, "Hidden Linux (0xc2)");
break;
case 0xc3:
snprintf(str, DESC_LEN, "Hidden Linux Swap (0xc3)");
break;
case 0xc4:
snprintf(str, DESC_LEN, "DR-DOS Secured FAT16 <32M (0xc4)");
break;
case 0xc5:
snprintf(str, DESC_LEN, "DR-DOS Secured Extended (0xc5)");
break;
case 0xc6:
case 0xc7:
snprintf(str, DESC_LEN,
"Corrupted Windows NT Volume / Stripe Set (0x%.2x)", ptype);
break;
case 0xc8:
snprintf(str, DESC_LEN, "Reserved for DR-DOS 8.0+ (0xc8)");
break;
case 0xc9:
snprintf(str, DESC_LEN, "Reserved for DR-DOS 8.0+ (0xc9)");
break;
case 0xca:
snprintf(str, DESC_LEN, "Reserved for DR-DOS 8.0+ (0xca)");
break;
case 0xcb:
snprintf(str, DESC_LEN, "DR-DOS 7.04+ Secured FAT32 CHS (0xcb)");
break;
case 0xcc:
snprintf(str, DESC_LEN, "DR-DOS 7.04+ Secured FAT32 LBA (0xcc)");
break;
case 0xcd:
snprintf(str, DESC_LEN, "CTOS Memdump? (0xcd)");
break;
case 0xce:
snprintf(str, DESC_LEN, "DR-DOS 7.04+ FAT16X LBA (0xce)");
break;
case 0xcf:
snprintf(str, DESC_LEN, "DR-DOS 7.04+ Secured EXT DOS LBA (0xcf)");
break;
case 0xd0:
snprintf(str, DESC_LEN, "Multiuser DOS Secured (0xd0)");
break;
/*case 0xd0:
snprintf(str, DESC_LEN, "REAL/32 Secure Big (0xd0)");
break; */
case 0xd1:
snprintf(str, DESC_LEN, "Old Multiuser DOS Secured FAT12 (0xd1)");
break;
case 0xd4:
snprintf(str, DESC_LEN,
"Old Multiuser DOS Secured FAT16 <32M (0xd4)");
break;
case 0xd5:
snprintf(str, DESC_LEN,
"Old Multiuser DOS Secured extended (0xd5)");
break;
case 0xd6:
snprintf(str, DESC_LEN,
"Old Multiuser DOS Secured FAT16 >=32M (0xd6)");
break;
case 0xd8:
snprintf(str, DESC_LEN, "CP/M-86 (0xd8)");
break;
case 0xda:
snprintf(str, DESC_LEN, "Non-FS Data (0xda)");
break;
case 0xdb:
snprintf(str, DESC_LEN,
"Digital Research CP/M, Concurrent CP/M, Concurrent DOS (0xdb)");
break;
/*case 0xdb:
snprintf(str, DESC_LEN, "Unisys CTOS (0xdb)");
break; */
/*case 0xdb:
snprintf(str, DESC_LEN, "KDG Telemetry SCPU boot (0xdb)");
break; */
case 0xdd:
snprintf(str, DESC_LEN, "Hidden CTOS Memdump? (0xdd)");
break;
case 0xde:
snprintf(str, DESC_LEN, "Dell Utilities FAT (0xde)");
break;
/*case 0xdf:
snprintf(str, DESC_LEN, "DG/UX Virtual Disk Manager (0xdf)");
break; */
/*case 0xdf:
snprintf(str, DESC_LEN, "BootIt EMBRM (0xdf)");
break; */
case 0xe0:
snprintf(str, DESC_LEN,
"Reserved by STMicroelectronics for ST AVFS. (0xe0)");
break;
case 0xe1:
snprintf(str, DESC_LEN,
"DOS Access or SpeedStor 12-bit FAT Extended (0xe1)");
break;
case 0xe3:
snprintf(str, DESC_LEN, "DOS R/O or SpeedStor (0xe3)");
break;
case 0xe4:
snprintf(str, DESC_LEN,
"SpeedStor 16-bit FAT Extended <1024 cyl. (0xe4)");
break;
case 0xe5:
snprintf(str, DESC_LEN,
"Tandy MS-DOS with Logically Sectored FAT (0xe5)");
break;
case 0xe6:
snprintf(str, DESC_LEN, "Storage Dimensions SpeedStor (0xe6)");
break;
case 0xeb:
snprintf(str, DESC_LEN, "BeOS BFS (0xeb)");
break;
case 0xee:
snprintf(str, DESC_LEN, "GPT Safety Partition (0xee)");
break;
case 0xef:
snprintf(str, DESC_LEN, "EFI File System (0xef)");
break;
case 0xf0:
snprintf(str, DESC_LEN, "Linux/PA-RISC Boot Loader (0xf0)");
break;
case 0xf1:
snprintf(str, DESC_LEN, "Storage Dimensions SpeedStor (0xf1)");
break;
case 0xf2:
snprintf(str, DESC_LEN, "DOS 3.3+ Secondary (0xf2)");
break;
case 0xf4:
snprintf(str, DESC_LEN, "SpeedStor Large (0xf4)");
break;
/*case 0xf4:
snprintf(str, DESC_LEN, "Prologue Single-Volume (0xf4)");
break; */
case 0xf5:
snprintf(str, DESC_LEN, "Prologue Multi-Volume (0xf5)");
break;
case 0xf6:
snprintf(str, DESC_LEN, "Storage Dimensions SpeedStor (0xf6)");
break;
case 0xf9:
snprintf(str, DESC_LEN, "pCache (0xf9)");
break;
case 0xfa:
snprintf(str, DESC_LEN, "Bochs (0xfa)");
break;
case 0xfb:
snprintf(str, DESC_LEN, "VMWare File System (0xfb)");
break;
case 0xfc:
snprintf(str, DESC_LEN, "VMWare Swap (0xfc)");
break;
case 0xfd:
snprintf(str, DESC_LEN, "Linux RAID (0xfd)");
break;
case 0xfe:
snprintf(str, DESC_LEN,
"Windows NT Disk Administrator Hidden (0xfe)");
break;
/*case 0xfe:
snprintf(str, DESC_LEN, "SpeedStor >1024 cyl. (0xfe)");
break; */
/*case 0xfe:
snprintf(str, DESC_LEN, "LANstep (0xfe)");
break; */
/*case 0xfe:
snprintf(str, DESC_LEN, "IBM PS/2 IML (0xfe)");
break; */
/*case 0xfe:
snprintf(str, DESC_LEN, "Old Linux Logical Volume Manager (0xfe)");
break; */
case 0xff:
snprintf(str, DESC_LEN, "Xenix Bad Block Table (0xff)");
break;
default:
snprintf(str, DESC_LEN, "Unknown Type (0x%.2x)", ptype);
break;
}
return str;
}
/*
* Load an extended partition table into the structure in TSK_VS_INFO.
*
* sect_cur: The sector where the extended table is located
* sect_ext_base: The sector of the primary extended table (this does
* not change for recursive calls)
* table: a counter that identifies the table depth
* (increases by 1 for each recursive call)
*
* For the primary extended table, sect_cur == sect_ext_base
*
* Return 1 on error and 0 on success
*
*/
static uint8_t
dos_load_ext_table(TSK_VS_INFO * vs, TSK_DADDR_T sect_cur,
TSK_DADDR_T sect_ext_base, int table)
{
dos_sect *sect;
char *sect_buf;
int i;
char *table_str;
ssize_t cnt;
TSK_DADDR_T max_addr = (vs->img_info->size - vs->offset) / vs->block_size; // max sector
if (tsk_verbose)
tsk_fprintf(stderr,
"dos_load_ext: Table Sector: %" PRIuDADDR
", Primary Base Sector: %" PRIuDADDR "\n", sect_cur,
sect_ext_base);
if ((sect_buf = tsk_malloc(vs->block_size)) == NULL)
return 1;
sect = (dos_sect *) sect_buf;
/* Read the partition table sector */
cnt = tsk_vs_read_block(vs, sect_cur, sect_buf, vs->block_size);
if (cnt != vs->block_size) {
if (cnt >= 0) {
tsk_error_reset();
tsk_error_set_errno(TSK_ERR_VS_READ);
}
tsk_error_set_errstr2("Extended DOS table sector %" PRIuDADDR,
sect_cur);
free(sect_buf);
return 1;
}
/* Sanity Check */
if (tsk_getu16(vs->endian, sect->magic) != DOS_MAGIC) {
tsk_error_reset();
tsk_error_set_errno(TSK_ERR_VS_MAGIC);
tsk_error_set_errstr("Extended DOS partition table in sector %"
PRIuDADDR, sect_cur);
free(sect_buf);
return 1;
}
/* Add an entry of 1 length for the table to the internal structure */
if ((table_str = tsk_malloc(32)) == NULL) {
free(sect_buf);
return 1;
}
snprintf(table_str, 32, "Extended Table (#%d)", table);
if (NULL == tsk_vs_part_add(vs, (TSK_DADDR_T) sect_cur,
(TSK_DADDR_T) 1, TSK_VS_PART_FLAG_META, table_str, table,
-1)) {
free(sect_buf);
return 1;
}
/* Cycle through the four partitions in the table
*
* When another extended partition is found, it is processed
* inside of the loop
*/
for (i = 0; i < 4; i++) {
dos_part *part = §->ptable[i];
/* Get the starting sector and size, we currently
* ignore CHS */
uint32_t part_start = tsk_getu32(vs->endian, part->start_sec);
uint32_t part_size = tsk_getu32(vs->endian, part->size_sec);
if (tsk_verbose)
tsk_fprintf(stderr,
"load_ext: %d:%d Start: %" PRIu32 " Size: %"
PRIu32 " Type: %d\n", table, i, part_start, part_size,
part->ptype);
/* part_start == 0 would cause infinite recursion */
if (part_size == 0 || part_start == 0)
continue;
/* partitions are addressed differently
* in extended partitions */
if (dos_is_ext(part->ptype)) {
TSK_VS_PART_INFO *part_info;
/* Sanity check to prevent infinite recursion in dos_load_ext_table.
* If we already have a partition with this starting address then
* return an error. This will prevent any more partitions from being
* added but will leave any existing partitions alone. */
part_info = vs->part_list;
while (part_info != NULL) {
if (part_info->start == (TSK_DADDR_T)(sect_ext_base + part_start)) {
if (tsk_verbose)
tsk_fprintf(stderr,
"Starting sector %" PRIuDADDR
" of extended partition has already been used\n",
(TSK_DADDR_T)(sect_ext_base + part_start));
tsk_error_reset();
tsk_error_set_errno(TSK_ERR_VS_BLK_NUM);
tsk_error_set_errstr
("dos_load_ext_table: Loop in partition table detected");
free(sect_buf);
return 1;
}
part_info = part_info->next;
}
/* part start is added to the start of the
* first extended partition (the primary
* extended partition) */
if (NULL == tsk_vs_part_add(vs,
(TSK_DADDR_T) (sect_ext_base + part_start),
(TSK_DADDR_T) part_size, TSK_VS_PART_FLAG_META,
dos_get_desc(part->ptype), table, i)) {
free(sect_buf);
return 1;
}
if (sect_ext_base + part_start > max_addr) {
if (tsk_verbose)
tsk_fprintf(stderr,
"Starting sector %" PRIuDADDR
" of extended partition too large for image\n",
sect_ext_base + part_start);
}
/* Process the extended partition */
else if (dos_load_ext_table(vs, sect_ext_base + part_start,
sect_ext_base, table + 1)) {
free(sect_buf);
return 1;
}
}
else {
/* part_start is added to the start of the
* current partition for the actual
* starting location */
// we ignore the max_addr checks on extended partitions...
if (NULL == tsk_vs_part_add(vs,
(TSK_DADDR_T) (sect_cur + part_start),
(TSK_DADDR_T) part_size, TSK_VS_PART_FLAG_ALLOC,
dos_get_desc(part->ptype), table, i)) {
free(sect_buf);
return 1;
}
}
}
free(sect_buf);
return 0;
}
/*
* Load the primary partition table (MBR) into the internal
* data structures in TSK_VS_INFO
*
* This will automatically call load_ext_table for extended
* partitions
*
* sect_cur is the address of the table to load
*
* 0 is returned if the load is successful and 1 if error
*/
static uint8_t
dos_load_prim_table(TSK_VS_INFO * vs, uint8_t test)
{
dos_sect *sect;
char *sect_buf;
int i, added = 0;
char *table_str;
ssize_t cnt;
TSK_DADDR_T taddr = vs->offset / vs->block_size + DOS_PART_SOFFSET;
TSK_DADDR_T max_addr = (vs->img_info->size - vs->offset) / vs->block_size; // max sector
if (tsk_verbose)
tsk_fprintf(stderr,
"dos_load_prim: Table Sector: %" PRIuDADDR "\n", taddr);
if ((sect_buf = tsk_malloc(vs->block_size)) == NULL)
return 1;
sect = (dos_sect *) sect_buf;
/* Read the table */
cnt = tsk_vs_read_block
(vs, DOS_PART_SOFFSET, sect_buf, vs->block_size);
if (cnt != vs->block_size) {
if (cnt >= 0) {
tsk_error_reset();
tsk_error_set_errno(TSK_ERR_VS_READ);
}
tsk_error_set_errstr2("Primary DOS table sector %" PRIuDADDR,
taddr);
free(sect_buf);
return 1;
}
/* Sanity Check */
if (tsk_vs_guessu16(vs, sect->magic, DOS_MAGIC)) {
tsk_error_reset();
tsk_error_set_errno(TSK_ERR_VS_MAGIC);
tsk_error_set_errstr
("File is not a DOS partition (invalid primary magic) (Sector: %"
PRIuDADDR ")", taddr);
if (tsk_verbose)
fprintf(stderr,
"File is not a DOS partition (invalid primary magic) (Sector: %"
PRIuDADDR ")", taddr);
free(sect_buf);
return 1;
}
/* Because FAT and NTFS use the same magic - check for a
* standard MS OEM name and sizes. Not a great check, but we can't
* really test the table entries.
*/
if (test) {
if (tsk_verbose)
tsk_fprintf(stderr,
"dos_load_prim_table: Testing FAT/NTFS conditions\n");
if (strncmp("MSDOS", sect->oemname, 5) == 0) {
tsk_error_reset();
tsk_error_set_errno(TSK_ERR_VS_MAGIC);
tsk_error_set_errstr
("dos_load_prim_table: MSDOS OEM name exists");
if (tsk_verbose)
tsk_fprintf(stderr,
"dos_load_prim_table: MSDOS OEM name exists\n");
free(sect_buf);
return 1;
}
else if (strncmp("MSWIN", sect->oemname, 5) == 0) {
tsk_error_reset();
tsk_error_set_errno(TSK_ERR_VS_MAGIC);
tsk_error_set_errstr
("dos_load_prim_table: MSWIN OEM name exists");
if (tsk_verbose)
tsk_fprintf(stderr,
"dos_load_prim_table: MSWIN OEM name exists\n");
free(sect_buf);
return 1;
}
else if (strncmp("NTFS", sect->oemname, 4) == 0) {
tsk_error_reset();
tsk_error_set_errno(TSK_ERR_VS_MAGIC);
tsk_error_set_errstr
("dos_load_prim_table: NTFS OEM name exists");
if (tsk_verbose)
tsk_fprintf(stderr,
"dos_load_prim_table: NTFS OEM name exists\n");
free(sect_buf);
return 1;
}
else if (strncmp("FAT", sect->oemname, 4) == 0) {
tsk_error_reset();
tsk_error_set_errno(TSK_ERR_VS_MAGIC);
tsk_error_set_errstr
("dos_load_prim_table: FAT OEM name exists");
if (tsk_verbose)
tsk_fprintf(stderr,
"dos_load_prim_table: FAT OEM name exists\n");
free(sect_buf);
return 1;
}
}
/* Add an entry of 1 sector for the table to the internal structure */
if ((table_str = tsk_malloc(32)) == NULL) {
free(sect_buf);
return 1;
}
snprintf(table_str, 32, "Primary Table (#0)");
if (NULL == tsk_vs_part_add(vs, DOS_PART_SOFFSET, (TSK_DADDR_T) 1,
TSK_VS_PART_FLAG_META, table_str, -1, -1)) {
free(sect_buf);
return 1;
}
/* Cycle through the partition table */
for (i = 0; i < 4; i++) {
dos_part *part = §->ptable[i];
/* We currently ignore CHS */
uint32_t part_start = tsk_getu32(vs->endian, part->start_sec);
uint32_t part_size = tsk_getu32(vs->endian, part->size_sec);
if (tsk_verbose)
tsk_fprintf(stderr,
"load_pri:0:%d Start: %" PRIu32 " Size: %" PRIu32
" Type: %d\n", i, part_start, part_size, part->ptype);
if (part_size == 0)
continue;
// make sure the first couple are in the image bounds
if ((i < 2) && (part_start > max_addr)) {
tsk_error_reset();
tsk_error_set_errno(TSK_ERR_VS_BLK_NUM);
tsk_error_set_errstr
("dos_load_prim_table: Starting sector too large for image");
if (tsk_verbose)
tsk_fprintf(stderr,
"Starting sector %" PRIu32 " too large for image\n",
part_start);
free(sect_buf);
return 1;
}
#if 0
// I'm not sure if this is too strict ...
else if ((part_start + part_size) > max_addr) {
tsk_error_reset();
tsk_error_set_errno(TSK_ERR_VS_BLK_NUM);
tsk_error_set_errstr
("dos_load_prim_table: Partition ends after image");
return 1;
}
#endif
added = 1;
/* Add the partition to the internal structure
* If it is an extended partition, process it now */
if (dos_is_ext(part->ptype)) {
if (NULL == tsk_vs_part_add(vs, (TSK_DADDR_T) part_start,
(TSK_DADDR_T) part_size, TSK_VS_PART_FLAG_META,
dos_get_desc(part->ptype), 0, i)) {
free(sect_buf);
return 1;
}
if (dos_load_ext_table(vs, part_start, part_start, 1)) {
if (tsk_verbose) {
fprintf(stderr,
"Error loading extended table, moving on");
tsk_error_print(stderr);
}
tsk_error_reset();
}
}
else {
if (NULL == tsk_vs_part_add(vs, (TSK_DADDR_T) part_start,
(TSK_DADDR_T) part_size, TSK_VS_PART_FLAG_ALLOC,
dos_get_desc(part->ptype), 0, i)) {
free(sect_buf);
return 1;
}
}
}
free(sect_buf);
if (added == 0) {
if (tsk_verbose)
tsk_fprintf(stderr, "dos_load_prim: No valid entries\n");
tsk_error_reset();
tsk_error_set_errno(TSK_ERR_VS_MAGIC);
tsk_error_set_errstr
("dos_load_prim_table: No valid entries in primary table");
return 1;
}
return 0;
}
static void
dos_close(TSK_VS_INFO * vs)
{
vs->tag = 0;
tsk_vs_part_free(vs);
free(vs);
}
/*
* Given the path to the file, open it and load the internal
* partition table structure
*
* offset is the byte offset to the start of the volume system
*
* If test is 1 then additional tests are performed to make sure
* it isn't a FAT or NTFS file system. This is used when autodetection
* is being used to detect the volume system type.
*/
TSK_VS_INFO *
tsk_vs_dos_open(TSK_IMG_INFO * img_info, TSK_DADDR_T offset, uint8_t test)
{
TSK_VS_INFO *vs;
// clean up any errors that are lying around
tsk_error_reset();
if (img_info->sector_size == 0) {
tsk_error_reset();
tsk_error_set_errno(TSK_ERR_VS_ARG);
tsk_error_set_errstr("tsk_vs_dos_open: sector size is 0");
return NULL;
}
vs = (TSK_VS_INFO *) tsk_malloc(sizeof(*vs));
if (vs == NULL)
return NULL;
vs->vstype = TSK_VS_TYPE_DOS;
vs->tag = TSK_VS_INFO_TAG;
vs->img_info = img_info;
vs->offset = offset;
/* initialize settings */
vs->part_list = NULL;
vs->part_count = 0;
vs->endian = 0;
vs->block_size = img_info->sector_size;
/* Assign functions */
vs->close = dos_close;
/* Load the partitions into the sorted list */
if (dos_load_prim_table(vs, test)) {
dos_close(vs);
return NULL;
}
/* fill in the sorted list with the 'unknown' values */
if (tsk_vs_part_unused(vs)) {
dos_close(vs);
return NULL;
}
return vs;
}
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