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# This is a generated file! Please edit source .ksy file and use kaitai-struct-compiler to rebuild
from pkg_resources import parse_version
from .kaitaistruct import __version__ as ks_version, KaitaiStruct, KaitaiStream, BytesIO
import collections
from enum import Enum
if parse_version(ks_version) < parse_version('0.7'):
raise Exception("Incompatible Kaitai Struct Python API: 0.7 or later is required, but you have %s" % (ks_version))
class Luks(KaitaiStruct):
"""Linux Unified Key Setup (LUKS) is a format specification for storing disk
encryption parameters and up to 8 user keys (which can unlock the master key).
.. seealso::
Source - https://gitlab.com/cryptsetup/cryptsetup/wikis/LUKS-standard/on-disk-format.pdf
"""
SEQ_FIELDS = ["partition_header"]
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._debug = collections.defaultdict(dict)
def _read(self):
self._debug['partition_header']['start'] = self._io.pos()
self.partition_header = self._root.PartitionHeader(self._io, self, self._root)
self.partition_header._read()
self._debug['partition_header']['end'] = self._io.pos()
class PartitionHeader(KaitaiStruct):
SEQ_FIELDS = ["magic", "version", "cipher_name_specification", "cipher_mode_specification", "hash_specification", "payload_offset", "number_of_key_bytes", "master_key_checksum", "master_key_salt_parameter", "master_key_iterations_parameter", "uuid", "key_slots"]
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._debug = collections.defaultdict(dict)
def _read(self):
self._debug['magic']['start'] = self._io.pos()
self.magic = self._io.ensure_fixed_contents(b"\x4C\x55\x4B\x53\xBA\xBE")
self._debug['magic']['end'] = self._io.pos()
self._debug['version']['start'] = self._io.pos()
self.version = self._io.ensure_fixed_contents(b"\x00\x01")
self._debug['version']['end'] = self._io.pos()
self._debug['cipher_name_specification']['start'] = self._io.pos()
self.cipher_name_specification = (self._io.read_bytes(32)).decode(u"ASCII")
self._debug['cipher_name_specification']['end'] = self._io.pos()
self._debug['cipher_mode_specification']['start'] = self._io.pos()
self.cipher_mode_specification = (self._io.read_bytes(32)).decode(u"ASCII")
self._debug['cipher_mode_specification']['end'] = self._io.pos()
self._debug['hash_specification']['start'] = self._io.pos()
self.hash_specification = (self._io.read_bytes(32)).decode(u"ASCII")
self._debug['hash_specification']['end'] = self._io.pos()
self._debug['payload_offset']['start'] = self._io.pos()
self.payload_offset = self._io.read_u4be()
self._debug['payload_offset']['end'] = self._io.pos()
self._debug['number_of_key_bytes']['start'] = self._io.pos()
self.number_of_key_bytes = self._io.read_u4be()
self._debug['number_of_key_bytes']['end'] = self._io.pos()
self._debug['master_key_checksum']['start'] = self._io.pos()
self.master_key_checksum = self._io.read_bytes(20)
self._debug['master_key_checksum']['end'] = self._io.pos()
self._debug['master_key_salt_parameter']['start'] = self._io.pos()
self.master_key_salt_parameter = self._io.read_bytes(32)
self._debug['master_key_salt_parameter']['end'] = self._io.pos()
self._debug['master_key_iterations_parameter']['start'] = self._io.pos()
self.master_key_iterations_parameter = self._io.read_u4be()
self._debug['master_key_iterations_parameter']['end'] = self._io.pos()
self._debug['uuid']['start'] = self._io.pos()
self.uuid = (self._io.read_bytes(40)).decode(u"ASCII")
self._debug['uuid']['end'] = self._io.pos()
self._debug['key_slots']['start'] = self._io.pos()
self.key_slots = [None] * (8)
for i in range(8):
if not 'arr' in self._debug['key_slots']:
self._debug['key_slots']['arr'] = []
self._debug['key_slots']['arr'].append({'start': self._io.pos()})
_t_key_slots = self._root.PartitionHeader.KeySlot(self._io, self, self._root)
_t_key_slots._read()
self.key_slots[i] = _t_key_slots
self._debug['key_slots']['arr'][i]['end'] = self._io.pos()
self._debug['key_slots']['end'] = self._io.pos()
class KeySlot(KaitaiStruct):
class KeySlotStates(Enum):
disabled_key_slot = 57005
enabled_key_slot = 11301363
SEQ_FIELDS = ["state_of_key_slot", "iteration_parameter", "salt_parameter", "start_sector_of_key_material", "number_of_anti_forensic_stripes"]
def __init__(self, _io, _parent=None, _root=None):
self._io = _io
self._parent = _parent
self._root = _root if _root else self
self._debug = collections.defaultdict(dict)
def _read(self):
self._debug['state_of_key_slot']['start'] = self._io.pos()
self.state_of_key_slot = KaitaiStream.resolve_enum(self._root.PartitionHeader.KeySlot.KeySlotStates, self._io.read_u4be())
self._debug['state_of_key_slot']['end'] = self._io.pos()
self._debug['iteration_parameter']['start'] = self._io.pos()
self.iteration_parameter = self._io.read_u4be()
self._debug['iteration_parameter']['end'] = self._io.pos()
self._debug['salt_parameter']['start'] = self._io.pos()
self.salt_parameter = self._io.read_bytes(32)
self._debug['salt_parameter']['end'] = self._io.pos()
self._debug['start_sector_of_key_material']['start'] = self._io.pos()
self.start_sector_of_key_material = self._io.read_u4be()
self._debug['start_sector_of_key_material']['end'] = self._io.pos()
self._debug['number_of_anti_forensic_stripes']['start'] = self._io.pos()
self.number_of_anti_forensic_stripes = self._io.read_u4be()
self._debug['number_of_anti_forensic_stripes']['end'] = self._io.pos()
@property
def key_material(self):
if hasattr(self, '_m_key_material'):
return self._m_key_material if hasattr(self, '_m_key_material') else None
_pos = self._io.pos()
self._io.seek((self.start_sector_of_key_material * 512))
self._debug['_m_key_material']['start'] = self._io.pos()
self._m_key_material = self._io.read_bytes((self._parent.number_of_key_bytes * self.number_of_anti_forensic_stripes))
self._debug['_m_key_material']['end'] = self._io.pos()
self._io.seek(_pos)
return self._m_key_material if hasattr(self, '_m_key_material') else None
@property
def payload(self):
if hasattr(self, '_m_payload'):
return self._m_payload if hasattr(self, '_m_payload') else None
_pos = self._io.pos()
self._io.seek((self.partition_header.payload_offset * 512))
self._debug['_m_payload']['start'] = self._io.pos()
self._m_payload = self._io.read_bytes_full()
self._debug['_m_payload']['end'] = self._io.pos()
self._io.seek(_pos)
return self._m_payload if hasattr(self, '_m_payload') else None
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