mirror of
https://github.com/SickGear/SickGear.git
synced 2024-11-22 21:05:05 +00:00
397 lines
15 KiB
Python
397 lines
15 KiB
Python
"""
|
|
New Technology File System (NTFS) file system parser.
|
|
|
|
Sources:
|
|
- The NTFS documentation
|
|
http://www.linux-ntfs.org/
|
|
- NTFS-3G driver
|
|
http://www.ntfs-3g.org/
|
|
|
|
Creation date: 3rd january 2007
|
|
Author: Victor Stinner
|
|
"""
|
|
|
|
from hachoir.parser import Parser
|
|
from hachoir.field import (FieldSet, Enum,
|
|
UInt8, UInt16, UInt32, UInt64, TimestampWin64,
|
|
String, Bytes, Bit, Bits,
|
|
NullBits, NullBytes, PaddingBytes, RawBytes)
|
|
from hachoir.core.endian import LITTLE_ENDIAN
|
|
from hachoir.core.text_handler import textHandler, hexadecimal, filesizeHandler
|
|
from hachoir.core.tools import humanFilesize, createDict
|
|
from hachoir.parser.common.msdos import MSDOSFileAttr32
|
|
|
|
SECTOR_SIZE = 512
|
|
|
|
|
|
class BiosParameterBlock(FieldSet):
|
|
"""
|
|
BIOS parameter block (bpb) structure
|
|
"""
|
|
static_size = 25 * 8
|
|
MEDIA_TYPE = {0xf8: "Hard disk"}
|
|
|
|
def createFields(self):
|
|
yield UInt16(self, "bytes_per_sector", "Size of a sector in bytes")
|
|
yield UInt8(self, "sectors_per_cluster", "Size of a cluster in sectors")
|
|
yield NullBytes(self, "reserved_sectors", 2)
|
|
yield NullBytes(self, "fats", 1)
|
|
yield NullBytes(self, "root_entries", 2)
|
|
yield NullBytes(self, "sectors", 2)
|
|
yield Enum(UInt8(self, "media_type"), self.MEDIA_TYPE)
|
|
yield NullBytes(self, "sectors_per_fat", 2)
|
|
yield UInt16(self, "sectors_per_track")
|
|
yield UInt16(self, "heads")
|
|
yield UInt32(self, "hidden_sectors")
|
|
yield NullBytes(self, "large_sectors", 4)
|
|
|
|
def validate(self):
|
|
if self["bytes_per_sector"].value not in (256, 512, 1024, 2048, 4096):
|
|
return "Invalid sector size (%u bytes)" % \
|
|
self["bytes_per_sector"].value
|
|
if self["sectors_per_cluster"].value not in (1, 2, 4, 8, 16, 32, 64, 128):
|
|
return "Invalid cluster size (%u sectors)" % \
|
|
self["sectors_per_cluster"].value
|
|
return ""
|
|
|
|
|
|
class MasterBootRecord(FieldSet):
|
|
static_size = 512 * 8
|
|
|
|
def createFields(self):
|
|
yield Bytes(self, "jump", 3, "Intel x86 jump instruction")
|
|
yield String(self, "name", 8)
|
|
yield BiosParameterBlock(self, "bios", "BIOS parameters")
|
|
|
|
yield textHandler(UInt8(self, "physical_drive", "(0x80)"), hexadecimal)
|
|
yield NullBytes(self, "current_head", 1)
|
|
yield textHandler(UInt8(self, "ext_boot_sig", "Extended boot signature (0x80)"), hexadecimal)
|
|
yield NullBytes(self, "unused", 1)
|
|
|
|
yield UInt64(self, "nb_sectors")
|
|
yield UInt64(self, "mft_cluster", "Cluster location of MFT data")
|
|
yield UInt64(self, "mftmirr_cluster", "Cluster location of copy of MFT")
|
|
yield UInt8(self, "cluster_per_mft", "MFT record size in clusters")
|
|
yield NullBytes(self, "reserved[]", 3)
|
|
yield UInt8(self, "cluster_per_index", "Index block size in clusters")
|
|
yield NullBytes(self, "reserved[]", 3)
|
|
yield textHandler(UInt64(self, "serial_number"), hexadecimal)
|
|
yield textHandler(UInt32(self, "checksum", "Boot sector checksum"), hexadecimal)
|
|
yield Bytes(self, "boot_code", 426)
|
|
yield Bytes(self, "mbr_magic", 2, r"Master boot record magic number (\x55\xAA)")
|
|
|
|
def createDescription(self):
|
|
size = self["nb_sectors"].value * self["bios/bytes_per_sector"].value
|
|
return "NTFS Master Boot Record (%s)" % humanFilesize(size)
|
|
|
|
|
|
class MFT_Flags(FieldSet):
|
|
static_size = 16
|
|
|
|
def createFields(self):
|
|
yield Bit(self, "in_use")
|
|
yield Bit(self, "is_directory")
|
|
yield NullBits(self, "padding", 14)
|
|
|
|
|
|
class RunListEntry(FieldSet):
|
|
def createFields(self):
|
|
header = UInt8(self, "header")
|
|
yield header
|
|
if header.value == 0:
|
|
return
|
|
|
|
offlen = header.value >> 4
|
|
lenlen = header.value & 0xf
|
|
|
|
if lenlen:
|
|
yield Bits(self, "length", lenlen * 8)
|
|
if offlen:
|
|
yield Bits(self, "offset", offlen * 8)
|
|
|
|
def createValue(self):
|
|
if 'length' in self:
|
|
length = self['length'].value
|
|
else:
|
|
length = 0
|
|
|
|
if 'offset' in self:
|
|
offset = self['offset'].value
|
|
offlen = self['offset'].size
|
|
if offset & (1 << (offlen - 1)):
|
|
offset -= 1 << offlen
|
|
else:
|
|
offset = 0
|
|
|
|
return (length, offset)
|
|
|
|
|
|
class RunList(FieldSet):
|
|
def createFields(self):
|
|
while 1:
|
|
entry = RunListEntry(self, "entry[]")
|
|
yield entry
|
|
if entry['header'].value == 0:
|
|
break
|
|
|
|
def createValue(self):
|
|
runs = []
|
|
curoff = 0
|
|
for entry in self.array('entry'):
|
|
length, offset = entry.value
|
|
curoff += offset
|
|
if entry['header'].value != 0:
|
|
runs.append((length, curoff))
|
|
return runs
|
|
|
|
|
|
class Attribute(FieldSet):
|
|
# --- Common code ---
|
|
|
|
def __init__(self, *args):
|
|
FieldSet.__init__(self, *args)
|
|
self._size = self["size"].value * 8
|
|
type = self["type"].value
|
|
if type in self.ATTR_INFO:
|
|
self._name = self.ATTR_INFO[type][0]
|
|
self._parser = self.ATTR_INFO[type][2]
|
|
|
|
def createFields(self):
|
|
yield Enum(textHandler(UInt32(self, "type"), hexadecimal), self.ATTR_NAME)
|
|
yield UInt32(self, "size")
|
|
yield UInt8(self, "non_resident", "Non-resident flag")
|
|
yield UInt8(self, "name_length", "Name length in bytes")
|
|
yield UInt16(self, "name_offset", "Name offset")
|
|
yield UInt16(self, "flags")
|
|
yield textHandler(UInt16(self, "attribute_id"), hexadecimal)
|
|
if self['non_resident'].value:
|
|
yield UInt64(self, "runlist_start", "Starting Virtual Cluster Number of the runlist")
|
|
yield UInt64(self, "runlist_stop", "Ending Virtual Cluster Number of the runlist")
|
|
yield UInt16(self, "runlist_offset", "Offset to the runlist")
|
|
yield UInt16(self, "compression_unit", "Compression unit size")
|
|
yield UInt32(self, "unused[]")
|
|
yield UInt64(self, "size_allocated", "Allocated size of the attribute content")
|
|
yield UInt64(self, "size_actual", "Actual size of the attribute content")
|
|
yield UInt64(self, "size_initialized", "Initialized size of the attribute content")
|
|
|
|
if self['name_length'].value:
|
|
padding = self.seekByte(self['name_offset'].value)
|
|
if padding:
|
|
yield padding
|
|
yield String(self, "name", self['name_length'].value * 2, charset="UTF-16-LE")
|
|
|
|
padding = self.seekByte(self['runlist_offset'].value)
|
|
if padding:
|
|
yield padding
|
|
yield RunList(self, "runlist")
|
|
|
|
else:
|
|
yield UInt32(self, "length_attr", "Length of the Attribute")
|
|
yield UInt16(self, "offset_attr", "Offset of the Attribute")
|
|
yield UInt8(self, "indexed_flag")
|
|
|
|
if self['name_length'].value:
|
|
padding = self.seekByte(self['name_offset'].value)
|
|
if padding:
|
|
yield padding
|
|
yield String(self, "name", self['name_length'].value * 2, charset="UTF-16-LE")
|
|
|
|
padding = self.seekByte(self['offset_attr'].value)
|
|
if padding:
|
|
yield padding
|
|
|
|
if self._parser:
|
|
yield from self._parser(self)
|
|
else:
|
|
size = self["length_attr"].value
|
|
if size:
|
|
yield RawBytes(self, "data", size)
|
|
|
|
size = (self.size - self.current_size) // 8
|
|
if size:
|
|
yield PaddingBytes(self, "end_padding", size)
|
|
|
|
def createDescription(self):
|
|
return "Attribute %s" % self["type"].display
|
|
FILENAME_NAMESPACE = {
|
|
0: "POSIX",
|
|
1: "Win32",
|
|
2: "DOS",
|
|
3: "Win32 & DOS",
|
|
}
|
|
|
|
# --- Parser specific to a type ---
|
|
def parseStandardInfo(self):
|
|
yield TimestampWin64(self, "ctime", "File Creation")
|
|
yield TimestampWin64(self, "atime", "File Altered")
|
|
yield TimestampWin64(self, "mtime", "MFT Changed")
|
|
yield TimestampWin64(self, "rtime", "File Read")
|
|
yield MSDOSFileAttr32(self, "file_attr", "DOS File Permissions")
|
|
yield UInt32(self, "max_version", "Maximum Number of Versions")
|
|
yield UInt32(self, "version", "Version Number")
|
|
yield UInt32(self, "class_id")
|
|
yield UInt32(self, "owner_id")
|
|
yield UInt32(self, "security_id")
|
|
yield filesizeHandler(UInt64(self, "quota_charged", "Quota Charged"))
|
|
yield UInt64(self, "usn", "Update Sequence Number (USN)")
|
|
|
|
def parseFilename(self):
|
|
yield UInt64(self, "ref", "File reference to the parent directory")
|
|
yield TimestampWin64(self, "ctime", "File Creation")
|
|
yield TimestampWin64(self, "atime", "File Altered")
|
|
yield TimestampWin64(self, "mtime", "MFT Changed")
|
|
yield TimestampWin64(self, "rtime", "File Read")
|
|
yield filesizeHandler(UInt64(self, "alloc_size", "Allocated size of the file"))
|
|
yield filesizeHandler(UInt64(self, "real_size", "Real size of the file"))
|
|
yield UInt32(self, "file_flags")
|
|
yield UInt32(self, "file_flags2", "Used by EAs and Reparse")
|
|
yield UInt8(self, "filename_length", "Filename length in characters")
|
|
yield Enum(UInt8(self, "filename_namespace"), self.FILENAME_NAMESPACE)
|
|
size = self["filename_length"].value * 2
|
|
if size:
|
|
yield String(self, "filename", size, charset="UTF-16-LE")
|
|
|
|
def parseData(self):
|
|
size = (self.size - self.current_size) // 8
|
|
if size:
|
|
yield Bytes(self, "data", size)
|
|
|
|
def parseBitmap(self):
|
|
size = (self.size - self.current_size)
|
|
for index in range(size):
|
|
yield Bit(self, "bit[]")
|
|
|
|
# --- Type information ---
|
|
ATTR_INFO = {
|
|
0x10: ('standard_info', 'STANDARD_INFORMATION ', parseStandardInfo),
|
|
0x20: ('attr_list', 'ATTRIBUTE_LIST ', None),
|
|
0x30: ('filename[]', 'FILE_NAME ', parseFilename),
|
|
0x40: ('vol_ver', 'VOLUME_VERSION', None),
|
|
0x50: ('security', 'SECURITY_DESCRIPTOR ', None),
|
|
0x60: ('vol_name', 'VOLUME_NAME ', None),
|
|
0x70: ('vol_info', 'VOLUME_INFORMATION ', None),
|
|
0x80: ('data', 'DATA ', parseData),
|
|
0x90: ('index_root', 'INDEX_ROOT ', None),
|
|
0xA0: ('index_alloc', 'INDEX_ALLOCATION ', None),
|
|
0xB0: ('bitmap', 'BITMAP ', parseBitmap),
|
|
0xC0: ('reparse', 'REPARSE_POINT ', None),
|
|
0xD0: ('ea_info', 'EA_INFORMATION ', None),
|
|
0xE0: ('ea', 'EA ', None),
|
|
0xF0: ('prop_set', 'PROPERTY_SET', None),
|
|
0x100: ('log_util', 'LOGGED_UTILITY_STREAM', None),
|
|
}
|
|
ATTR_NAME = createDict(ATTR_INFO, 1)
|
|
|
|
|
|
class File(FieldSet):
|
|
# static_size = 48*8
|
|
|
|
def __init__(self, *args):
|
|
FieldSet.__init__(self, *args)
|
|
self._size = self["bytes_allocated"].value * 8
|
|
|
|
def createFields(self):
|
|
yield Bytes(self, "signature", 4, "Usually the magic is 'FILE'")
|
|
yield UInt16(self, "usa_offset", "Update Sequence Array offset")
|
|
yield UInt16(self, "usa_count", "Update Sequence Array count")
|
|
yield UInt64(self, "lsn", "$LogFile sequence number for this record")
|
|
yield UInt16(self, "sequence_number", "Number of times this mft record has been reused")
|
|
yield UInt16(self, "link_count", "Number of hard links")
|
|
yield UInt16(self, "attrs_offset", "Byte offset to the first attribute")
|
|
yield MFT_Flags(self, "flags")
|
|
yield UInt32(self, "bytes_in_use", "Number of bytes used in this record")
|
|
yield UInt32(self, "bytes_allocated", "Number of bytes allocated for this record")
|
|
yield UInt64(self, "base_mft_record")
|
|
yield UInt16(self, "next_attr_instance")
|
|
|
|
# The below fields are specific to NTFS 3.1+ (Windows XP and above)
|
|
yield NullBytes(self, "reserved", 2)
|
|
yield UInt32(self, "mft_record_number", "Number of this mft record")
|
|
|
|
if self["usa_offset"].value:
|
|
padding = self.seekByte(self["usa_offset"].value, relative=True)
|
|
if padding:
|
|
yield padding
|
|
|
|
yield UInt16(self, "usa_number")
|
|
for i in range(self["usa_count"].value):
|
|
yield UInt16(self, "usa_value[]")
|
|
|
|
padding = self.seekByte(self["attrs_offset"].value, relative=True)
|
|
if padding:
|
|
yield padding
|
|
|
|
while not self.eof:
|
|
addr = self.absolute_address + self.current_size
|
|
if self.stream.readBytes(addr, 4) == b"\xFF\xFF\xFF\xFF":
|
|
yield Bytes(self, "attr_end_marker", 8)
|
|
break
|
|
yield Attribute(self, "attr[]")
|
|
|
|
size = self["bytes_in_use"].value - self.current_size // 8
|
|
if size:
|
|
yield RawBytes(self, "end_rawdata", size)
|
|
|
|
size = (self.size - self.current_size) // 8
|
|
if size:
|
|
yield RawBytes(self, "end_padding", size, "Unused but allocated bytes")
|
|
|
|
def createDescription(self):
|
|
text = "File"
|
|
fileattr = None
|
|
for fn in self.array('filename'):
|
|
if 'filename' not in fn and fileattr is not None:
|
|
# Prefer file attributes with filenames
|
|
continue
|
|
if 'Win32' in fn['filename_namespace'].display:
|
|
# Prefer Win32 filename
|
|
fileattr = fn
|
|
break
|
|
else:
|
|
fileattr = fn
|
|
|
|
if fileattr:
|
|
if 'filename' in fileattr:
|
|
text += ' "%s"' % fileattr["filename"].value
|
|
text += ' (%s)' % fileattr["real_size"].display
|
|
if "standard_info/file_attr" in self:
|
|
text += ', %s' % self["standard_info/file_attr"].display
|
|
return text
|
|
|
|
|
|
class NTFS(Parser):
|
|
MAGIC = b"\xEB\x52\x90NTFS "
|
|
PARSER_TAGS = {
|
|
"id": "ntfs",
|
|
"category": "file_system",
|
|
"description": "NTFS file system",
|
|
"min_size": 1024 * 8,
|
|
"magic": ((MAGIC, 0),),
|
|
}
|
|
endian = LITTLE_ENDIAN
|
|
_cluster_size = None
|
|
|
|
def validate(self):
|
|
if self.stream.readBytes(0, len(self.MAGIC)) != self.MAGIC:
|
|
return "Invalid magic string"
|
|
err = self["mbr/bios"].validate()
|
|
if err:
|
|
return err
|
|
return True
|
|
|
|
def createFields(self):
|
|
yield MasterBootRecord(self, "mbr")
|
|
|
|
bios = self["mbr/bios"]
|
|
cluster_size = bios["sectors_per_cluster"].value * \
|
|
bios["bytes_per_sector"].value
|
|
offset = self["mbr/mft_cluster"].value * cluster_size
|
|
padding = self.seekByte(offset, relative=False)
|
|
if padding:
|
|
yield padding
|
|
for index in range(1000):
|
|
yield File(self, "file[]")
|
|
|
|
size = (self.size - self.current_size) // 8
|
|
if size:
|
|
yield RawBytes(self, "end", size)
|