# 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 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 Vfat(KaitaiStruct): SEQ_FIELDS = ["boot_sector"] 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['boot_sector']['start'] = self._io.pos() self.boot_sector = self._root.BootSector(self._io, self, self._root) self.boot_sector._read() self._debug['boot_sector']['end'] = self._io.pos() class ExtBiosParamBlockFat32(KaitaiStruct): """Extended BIOS Parameter Block for FAT32.""" SEQ_FIELDS = ["ls_per_fat", "has_active_fat", "reserved1", "active_fat_id", "reserved2", "fat_version", "root_dir_start_clus", "ls_fs_info", "boot_sectors_copy_start_ls", "reserved3", "phys_drive_num", "reserved4", "ext_boot_sign", "volume_id", "partition_volume_label", "fs_type_str"] 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['ls_per_fat']['start'] = self._io.pos() self.ls_per_fat = self._io.read_u4le() self._debug['ls_per_fat']['end'] = self._io.pos() self._debug['has_active_fat']['start'] = self._io.pos() self.has_active_fat = self._io.read_bits_int(1) != 0 self._debug['has_active_fat']['end'] = self._io.pos() self._debug['reserved1']['start'] = self._io.pos() self.reserved1 = self._io.read_bits_int(3) self._debug['reserved1']['end'] = self._io.pos() self._debug['active_fat_id']['start'] = self._io.pos() self.active_fat_id = self._io.read_bits_int(4) self._debug['active_fat_id']['end'] = self._io.pos() self._io.align_to_byte() self._debug['reserved2']['start'] = self._io.pos() self.reserved2 = self._io.ensure_fixed_contents(b"\x00") self._debug['reserved2']['end'] = self._io.pos() self._debug['fat_version']['start'] = self._io.pos() self.fat_version = self._io.read_u2le() self._debug['fat_version']['end'] = self._io.pos() self._debug['root_dir_start_clus']['start'] = self._io.pos() self.root_dir_start_clus = self._io.read_u4le() self._debug['root_dir_start_clus']['end'] = self._io.pos() self._debug['ls_fs_info']['start'] = self._io.pos() self.ls_fs_info = self._io.read_u2le() self._debug['ls_fs_info']['end'] = self._io.pos() self._debug['boot_sectors_copy_start_ls']['start'] = self._io.pos() self.boot_sectors_copy_start_ls = self._io.read_u2le() self._debug['boot_sectors_copy_start_ls']['end'] = self._io.pos() self._debug['reserved3']['start'] = self._io.pos() self.reserved3 = self._io.read_bytes(12) self._debug['reserved3']['end'] = self._io.pos() self._debug['phys_drive_num']['start'] = self._io.pos() self.phys_drive_num = self._io.read_u1() self._debug['phys_drive_num']['end'] = self._io.pos() self._debug['reserved4']['start'] = self._io.pos() self.reserved4 = self._io.read_u1() self._debug['reserved4']['end'] = self._io.pos() self._debug['ext_boot_sign']['start'] = self._io.pos() self.ext_boot_sign = self._io.read_u1() self._debug['ext_boot_sign']['end'] = self._io.pos() self._debug['volume_id']['start'] = self._io.pos() self.volume_id = self._io.read_bytes(4) self._debug['volume_id']['end'] = self._io.pos() self._debug['partition_volume_label']['start'] = self._io.pos() self.partition_volume_label = (KaitaiStream.bytes_strip_right(self._io.read_bytes(11), 32)).decode(u"ASCII") self._debug['partition_volume_label']['end'] = self._io.pos() self._debug['fs_type_str']['start'] = self._io.pos() self.fs_type_str = (KaitaiStream.bytes_strip_right(self._io.read_bytes(8), 32)).decode(u"ASCII") self._debug['fs_type_str']['end'] = self._io.pos() class BootSector(KaitaiStruct): SEQ_FIELDS = ["jmp_instruction", "oem_name", "bpb", "ebpb_fat16", "ebpb_fat32"] 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['jmp_instruction']['start'] = self._io.pos() self.jmp_instruction = self._io.read_bytes(3) self._debug['jmp_instruction']['end'] = self._io.pos() self._debug['oem_name']['start'] = self._io.pos() self.oem_name = (KaitaiStream.bytes_strip_right(self._io.read_bytes(8), 32)).decode(u"ASCII") self._debug['oem_name']['end'] = self._io.pos() self._debug['bpb']['start'] = self._io.pos() self.bpb = self._root.BiosParamBlock(self._io, self, self._root) self.bpb._read() self._debug['bpb']['end'] = self._io.pos() if not (self.is_fat32): self._debug['ebpb_fat16']['start'] = self._io.pos() self.ebpb_fat16 = self._root.ExtBiosParamBlockFat16(self._io, self, self._root) self.ebpb_fat16._read() self._debug['ebpb_fat16']['end'] = self._io.pos() if self.is_fat32: self._debug['ebpb_fat32']['start'] = self._io.pos() self.ebpb_fat32 = self._root.ExtBiosParamBlockFat32(self._io, self, self._root) self.ebpb_fat32._read() self._debug['ebpb_fat32']['end'] = self._io.pos() @property def pos_fats(self): """Offset of FATs in bytes from start of filesystem.""" if hasattr(self, '_m_pos_fats'): return self._m_pos_fats if hasattr(self, '_m_pos_fats') else None self._m_pos_fats = (self.bpb.bytes_per_ls * self.bpb.num_reserved_ls) return self._m_pos_fats if hasattr(self, '_m_pos_fats') else None @property def ls_per_fat(self): if hasattr(self, '_m_ls_per_fat'): return self._m_ls_per_fat if hasattr(self, '_m_ls_per_fat') else None self._m_ls_per_fat = (self.ebpb_fat32.ls_per_fat if self.is_fat32 else self.bpb.ls_per_fat) return self._m_ls_per_fat if hasattr(self, '_m_ls_per_fat') else None @property def ls_per_root_dir(self): """Size of root directory in logical sectors. .. seealso:: FAT: General Overview of On-Disk Format, section "FAT Data Structure" """ if hasattr(self, '_m_ls_per_root_dir'): return self._m_ls_per_root_dir if hasattr(self, '_m_ls_per_root_dir') else None self._m_ls_per_root_dir = (((self.bpb.max_root_dir_rec * 32) + self.bpb.bytes_per_ls) - 1) // self.bpb.bytes_per_ls return self._m_ls_per_root_dir if hasattr(self, '_m_ls_per_root_dir') else None @property def is_fat32(self): """Determines if filesystem is FAT32 (true) or FAT12/16 (false) by analyzing some preliminary conditions in BPB. Used to determine whether we should parse post-BPB data as `ext_bios_param_block_fat16` or `ext_bios_param_block_fat32`. """ if hasattr(self, '_m_is_fat32'): return self._m_is_fat32 if hasattr(self, '_m_is_fat32') else None self._m_is_fat32 = self.bpb.max_root_dir_rec == 0 return self._m_is_fat32 if hasattr(self, '_m_is_fat32') else None @property def size_fat(self): """Size of one FAT in bytes.""" if hasattr(self, '_m_size_fat'): return self._m_size_fat if hasattr(self, '_m_size_fat') else None self._m_size_fat = (self.bpb.bytes_per_ls * self.ls_per_fat) return self._m_size_fat if hasattr(self, '_m_size_fat') else None @property def pos_root_dir(self): """Offset of root directory in bytes from start of filesystem.""" if hasattr(self, '_m_pos_root_dir'): return self._m_pos_root_dir if hasattr(self, '_m_pos_root_dir') else None self._m_pos_root_dir = (self.bpb.bytes_per_ls * (self.bpb.num_reserved_ls + (self.ls_per_fat * self.bpb.num_fats))) return self._m_pos_root_dir if hasattr(self, '_m_pos_root_dir') else None @property def size_root_dir(self): """Size of root directory in bytes.""" if hasattr(self, '_m_size_root_dir'): return self._m_size_root_dir if hasattr(self, '_m_size_root_dir') else None self._m_size_root_dir = (self.ls_per_root_dir * self.bpb.bytes_per_ls) return self._m_size_root_dir if hasattr(self, '_m_size_root_dir') else None class BiosParamBlock(KaitaiStruct): SEQ_FIELDS = ["bytes_per_ls", "ls_per_clus", "num_reserved_ls", "num_fats", "max_root_dir_rec", "total_ls_2", "media_code", "ls_per_fat", "ps_per_track", "num_heads", "num_hidden_sectors", "total_ls_4"] 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['bytes_per_ls']['start'] = self._io.pos() self.bytes_per_ls = self._io.read_u2le() self._debug['bytes_per_ls']['end'] = self._io.pos() self._debug['ls_per_clus']['start'] = self._io.pos() self.ls_per_clus = self._io.read_u1() self._debug['ls_per_clus']['end'] = self._io.pos() self._debug['num_reserved_ls']['start'] = self._io.pos() self.num_reserved_ls = self._io.read_u2le() self._debug['num_reserved_ls']['end'] = self._io.pos() self._debug['num_fats']['start'] = self._io.pos() self.num_fats = self._io.read_u1() self._debug['num_fats']['end'] = self._io.pos() self._debug['max_root_dir_rec']['start'] = self._io.pos() self.max_root_dir_rec = self._io.read_u2le() self._debug['max_root_dir_rec']['end'] = self._io.pos() self._debug['total_ls_2']['start'] = self._io.pos() self.total_ls_2 = self._io.read_u2le() self._debug['total_ls_2']['end'] = self._io.pos() self._debug['media_code']['start'] = self._io.pos() self.media_code = self._io.read_u1() self._debug['media_code']['end'] = self._io.pos() self._debug['ls_per_fat']['start'] = self._io.pos() self.ls_per_fat = self._io.read_u2le() self._debug['ls_per_fat']['end'] = self._io.pos() self._debug['ps_per_track']['start'] = self._io.pos() self.ps_per_track = self._io.read_u2le() self._debug['ps_per_track']['end'] = self._io.pos() self._debug['num_heads']['start'] = self._io.pos() self.num_heads = self._io.read_u2le() self._debug['num_heads']['end'] = self._io.pos() self._debug['num_hidden_sectors']['start'] = self._io.pos() self.num_hidden_sectors = self._io.read_u4le() self._debug['num_hidden_sectors']['end'] = self._io.pos() self._debug['total_ls_4']['start'] = self._io.pos() self.total_ls_4 = self._io.read_u4le() self._debug['total_ls_4']['end'] = self._io.pos() class RootDirectoryRec(KaitaiStruct): SEQ_FIELDS = ["file_name", "attribute", "reserved", "time", "date", "start_clus", "file_size"] 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['file_name']['start'] = self._io.pos() self.file_name = self._io.read_bytes(11) self._debug['file_name']['end'] = self._io.pos() self._debug['attribute']['start'] = self._io.pos() self.attribute = self._io.read_u1() self._debug['attribute']['end'] = self._io.pos() self._debug['reserved']['start'] = self._io.pos() self.reserved = self._io.read_bytes(10) self._debug['reserved']['end'] = self._io.pos() self._debug['time']['start'] = self._io.pos() self.time = self._io.read_u2le() self._debug['time']['end'] = self._io.pos() self._debug['date']['start'] = self._io.pos() self.date = self._io.read_u2le() self._debug['date']['end'] = self._io.pos() self._debug['start_clus']['start'] = self._io.pos() self.start_clus = self._io.read_u2le() self._debug['start_clus']['end'] = self._io.pos() self._debug['file_size']['start'] = self._io.pos() self.file_size = self._io.read_u4le() self._debug['file_size']['end'] = self._io.pos() class RootDirectory(KaitaiStruct): SEQ_FIELDS = ["records"] 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['records']['start'] = self._io.pos() self.records = [None] * (self._root.boot_sector.bpb.max_root_dir_rec) for i in range(self._root.boot_sector.bpb.max_root_dir_rec): if not 'arr' in self._debug['records']: self._debug['records']['arr'] = [] self._debug['records']['arr'].append({'start': self._io.pos()}) _t_records = self._root.RootDirectoryRec(self._io, self, self._root) _t_records._read() self.records[i] = _t_records self._debug['records']['arr'][i]['end'] = self._io.pos() self._debug['records']['end'] = self._io.pos() class ExtBiosParamBlockFat16(KaitaiStruct): """Extended BIOS Parameter Block (DOS 4.0+, OS/2 1.0+). Used only for FAT12 and FAT16. """ SEQ_FIELDS = ["phys_drive_num", "reserved1", "ext_boot_sign", "volume_id", "partition_volume_label", "fs_type_str"] 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['phys_drive_num']['start'] = self._io.pos() self.phys_drive_num = self._io.read_u1() self._debug['phys_drive_num']['end'] = self._io.pos() self._debug['reserved1']['start'] = self._io.pos() self.reserved1 = self._io.read_u1() self._debug['reserved1']['end'] = self._io.pos() self._debug['ext_boot_sign']['start'] = self._io.pos() self.ext_boot_sign = self._io.read_u1() self._debug['ext_boot_sign']['end'] = self._io.pos() self._debug['volume_id']['start'] = self._io.pos() self.volume_id = self._io.read_bytes(4) self._debug['volume_id']['end'] = self._io.pos() self._debug['partition_volume_label']['start'] = self._io.pos() self.partition_volume_label = (KaitaiStream.bytes_strip_right(self._io.read_bytes(11), 32)).decode(u"ASCII") self._debug['partition_volume_label']['end'] = self._io.pos() self._debug['fs_type_str']['start'] = self._io.pos() self.fs_type_str = (KaitaiStream.bytes_strip_right(self._io.read_bytes(8), 32)).decode(u"ASCII") self._debug['fs_type_str']['end'] = self._io.pos() @property def fats(self): if hasattr(self, '_m_fats'): return self._m_fats if hasattr(self, '_m_fats') else None _pos = self._io.pos() self._io.seek(self.boot_sector.pos_fats) self._debug['_m_fats']['start'] = self._io.pos() self._m_fats = [None] * (self.boot_sector.bpb.num_fats) for i in range(self.boot_sector.bpb.num_fats): if not 'arr' in self._debug['_m_fats']: self._debug['_m_fats']['arr'] = [] self._debug['_m_fats']['arr'].append({'start': self._io.pos()}) self._m_fats[i] = self._io.read_bytes(self.boot_sector.size_fat) self._debug['_m_fats']['arr'][i]['end'] = self._io.pos() self._debug['_m_fats']['end'] = self._io.pos() self._io.seek(_pos) return self._m_fats if hasattr(self, '_m_fats') else None @property def root_dir(self): if hasattr(self, '_m_root_dir'): return self._m_root_dir if hasattr(self, '_m_root_dir') else None _pos = self._io.pos() self._io.seek(self.boot_sector.pos_root_dir) self._debug['_m_root_dir']['start'] = self._io.pos() self._raw__m_root_dir = self._io.read_bytes(self.boot_sector.size_root_dir) io = KaitaiStream(BytesIO(self._raw__m_root_dir)) self._m_root_dir = self._root.RootDirectory(io, self, self._root) self._m_root_dir._read() self._debug['_m_root_dir']['end'] = self._io.pos() self._io.seek(_pos) return self._m_root_dir if hasattr(self, '_m_root_dir') else None