/usr/lib/python2.7/dist-packages/rekall/plugins/filesystems/tsk.py is in python-rekall-core 1.6.0+dfsg-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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from rekall import addrspace
from rekall import plugin
from rekall import obj
from rekall import utils
from rekall.plugins import guess_profile
from rekall.plugins.overlays import basic
class FSEntry(object):
def __init__(self, tsk_file):
self.tsk_file = tsk_file
@property
def type(self):
return str(self.tsk_file.info.meta.type)[17:]
@property
def name(self):
return self.tsk_file.info.name.name
@property
def size(self):
return self.tsk_file.info.meta.size
def read(self, start, size):
if self.size > 0:
return self.tsk_file.read_random(start, size)
else:
return ""
def __iter__(self):
if self.type == "DIR":
for directory_entry in self.tsk_file.as_directory():
if directory_entry.info.meta is None:
continue
name = directory_entry.info.name.name
if name in [".", ".."]:
continue
yield FSEntry(directory_entry)
class FS(object):
def __init__(self, tsk_fs):
self.tsk_fs = tsk_fs
def get_fs_entry_by_path(self, path):
path = path.replace('\\', '/')
tsk_file = self.tsk_fs.open(path)
return FSEntry(tsk_file)
class VolumeSystem(object):
"""Wrap a TSK_VS_INFO struct."""
def __init__(self, disk, tsk_vs, session=None):
self.session = session
self._disk = disk
self.tsk_vs = tsk_vs
self.type = str(self.tsk_vs.info.vstype)[12:]
@utils.safe_property
def partitions(self):
return [Partition(self._disk, x, session=self.session, id=i)
for i, x in enumerate(self.tsk_vs)]
class PartitionAddressSpace(addrspace.RunBasedAddressSpace):
"""Create a mapping into the partition."""
def __init__(self, partition, **kwargs):
super(PartitionAddressSpace, self).__init__(**kwargs)
self.partition = partition
self.add_run(0, partition.start, partition.length,
partition.disk.address_space)
def __repr__(self):
return "<Partition %s @ %#x>" % (self.partition.id,
self.partition.start)
class Partition(object):
"""Wrap a TSK_VS_PART_INFO object."""
def __init__(self, disk, partition=None, id=0, session=None,
filesystem=None):
self.tsk_part = partition or obj.NoneObject()
self.id = id
self.disk = disk
self.session = session
self.filesystem = filesystem or obj.NoneObject("No filesystem")
if (filesystem == None and
self.tsk_part.flags == pytsk3.TSK_VS_PART_FLAG_ALLOC):
try:
address_space = self.get_partition_address_space()
filesystem = pytsk3.FS_Info(AS_Img_Info(address_space))
self.filesystem = FS(filesystem)
except IOError:
pass
def get_partition_address_space(self):
return PartitionAddressSpace(
session=self.session, partition=self)
@utils.safe_property
def start(self):
return (self.tsk_part.start * self.disk.block_size)
@utils.safe_property
def length(self):
return (self.tsk_part.len * self.disk.block_size)
class Disk(object):
def __init__(self, address_space, session=None):
self.session = session
self.block_size = 512
# The address space of the entire disk.
self.address_space = address_space
self._img_info = AS_Img_Info(address_space)
try:
# open as disk image
tsk_vs = pytsk3.Volume_Info(self._img_info)
self.volume_system = VolumeSystem(
self, tsk_vs, session=self.session)
self.block_size = tsk_vs.info.block_size
self.partitions = self.volume_system.partitions
except IOError:
# open as partition image
self.volume_system = obj.NoneObject("No Volume")
self.partitions = []
try:
fake_partition = Partition(
self, filesystem=FS(pytsk3.FS_Info(self._img_info)),
session=self.session)
self.partitions.append(fake_partition)
except IOError:
pass
def read(self, offset, size):
return self._img_info.read(offset, size)
class AS_Img_Info(pytsk3.Img_Info):
def __init__(self, address_space):
self._as = address_space
pytsk3.Img_Info.__init__(self, "")
def close(self):
self._as.close()
def read(self, offset, size):
return self._as.read(offset, size)
def get_size(self):
return self._as.end()
class TSKProfile(obj.Profile):
pass
class TSKDetector(guess_profile.DetectionMethod):
name = "tsk"
def Offsets(self):
return [0]
def DetectFromHit(self, hit, offset, address_space):
_ = offset
disk = Disk(address_space, session=self.session)
if len(disk.partitions) > 0:
# Select a partition to make the default. Users can change
# partitions using the cc plugin.
self.session.SetParameter("disk", disk)
profile = TSKProfile(session=self.session)
for partition in disk.partitions:
if partition.filesystem.tsk_fs.info.ftype:
self.session.logging.debug(
"Switching to first partition with filesystem.")
cc = SetPartitionContext(session=self.session,
profile=profile)
cc.SwitchPartition(partition)
break
return profile
return None
class AbstractTSKCommandPlugin(plugin.PhysicalASMixin,
plugin.TypedProfileCommand,
plugin.ProfileCommand):
"""Baseclass for all TSK related plugins."""
__abstract = True
mode = "mode_tsk"
class SetPartitionContext(AbstractTSKCommandPlugin):
name = "cc"
interactive = True
__args = [
dict(name="partition_number", type="IntParser", positional=True,
help="The partition to switch to.")
]
table_header = [
dict(name="message"),
]
suppress_headers = True
def __enter__(self):
self.partition_context = self.session.GetParameter("partition_context")
return self
def __exit__(self, unused_type, unused_value, unused_traceback):
self.SwitchPartition(self.partition_context)
def SwitchPartition(self, partition=None):
disk = self.session.GetParameter("disk")
if isinstance(partition, (int, long)):
partition = disk.partitions[partition]
message = ("Switching to partition context: {0} "
"(Starts at {1:#x})").format(
partition.id, partition.start)
self.session.SetCache(
"default_address_space",
partition.get_partition_address_space(),
volatile=False)
# Reset the address resolver for the new context.
self.session.SetCache("partition_context", partition,
volatile=False)
self.session.logging.debug(message)
return message
def collect(self):
yield dict(
message=self.SwitchPartition(self.plugin_args.partition_number))
class TskMmls(AbstractTSKCommandPlugin):
name = "mmls"
table_header = [
dict(name="Partition", hidden=True),
dict(name="PartId"),
dict(name="Type", width=20),
dict(name="Filesystem", width=20),
dict(name="Offset", style="address"),
dict(name="Size", style="address"),
]
def collect(self):
disk = self.session.GetParameter("disk")
block_size = disk.block_size
for i, partition in enumerate(disk.partitions):
yield dict(Partition=partition,
PartId=i,
Type=partition.tsk_part.desc,
Filesystem=partition.filesystem.tsk_fs.info.ftype,
Offset=partition.tsk_part.start * block_size,
Size=partition.tsk_part.len * block_size,
)
class TSKFls(AbstractTSKCommandPlugin):
name = "fls"
__args = [
dict(name="dir_path", default="/", positional=True,
help="Directory path to print content of")
]
table_header = [
dict(name="name", width=50),
dict(name="inode", width=20),
dict(name="type", width=10),
dict(name="size", width=10),
dict(name="mtime", hidden=True, width=20),
dict(name="atime", hidden=True, width=20),
dict(name="ctime"),
]
def collect(self):
dir_path = self.plugin_args.dir_path
partition = self.session.GetParameter("partition_context")
try:
for entry in partition.filesystem.get_fs_entry_by_path(dir_path):
yield dict(name=entry.name,
inode=entry.tsk_file.info.meta.addr,
type=entry.type,
size=entry.size,
ctime=basic.UnixTimeStamp(
session=self.session,
name="ctime",
value=entry.tsk_file.info.meta.ctime),
mtime=basic.UnixTimeStamp(
session=self.session,
name="mtime",
value=entry.tsk_file.info.meta.mtime),
atime=basic.UnixTimeStamp(
session=self.session,
name="atime",
value=entry.tsk_file.info.meta.atime),
)
except IOError as e:
raise plugin.PluginError(e)
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