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SerializedFile.py
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503 lines (420 loc) · 17.7 KB
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from __future__ import annotations
from ntpath import basename
from typing import TYPE_CHECKING, Dict, List, Optional, Tuple
from attrs import define
from .. import config
from ..enums import BuildTarget, ClassIDType, CommonString
from ..helpers.ContainerHelper import ContainerHelper
from ..helpers.TypeTreeHelper import TypeTreeNode
from ..helpers.UnityVersion import UnityVersion
from ..streams import EndianBinaryWriter
from . import BundleFile, File
from .ObjectReader import ObjectReader
if TYPE_CHECKING:
from ..classes import AssetBundle, Object
from ..files import ObjectReader
from ..streams.EndianBinaryReader import EndianBinaryReader
@define(slots=True)
class SerializedFileHeader:
metadata_size: int
file_size: int
version: int
data_offset: int
endian: str
reserved: bytes
def __init__(self, reader: EndianBinaryReader):
(
self.metadata_size,
self.file_size,
self.version,
self.data_offset,
) = reader.read_u_int_array(4)
@define(slots=True)
class LocalSerializedObjectIdentifier: # script type
local_serialized_file_index: int
local_identifier_in_file: int
def __init__(self, header: SerializedFileHeader, reader: EndianBinaryReader):
self.local_serialized_file_index = reader.read_int()
if header.version < 14:
self.local_identifier_in_file = reader.read_int()
else:
reader.align_stream()
self.local_identifier_in_file = reader.read_long()
def write(self, header: SerializedFileHeader, writer: EndianBinaryWriter):
writer.write_int(self.local_serialized_file_index)
if header.version < 14:
writer.write_int(self.local_identifier_in_file)
else:
writer.align_stream()
writer.write_long(self.local_identifier_in_file)
@define(slots=True)
class FileIdentifier: # external
path: str
temp_empty: Optional[str] = None
guid: Optional[bytes] = None
type: Optional[int] = None
# enum { kNonAssetType = 0, kDeprecatedCachedAssetType = 1, kSerializedAssetType = 2, kMetaAssetType = 3 };
@property
def name(self):
return basename(self.path)
def __repr__(self):
return f"<{self.__class__.__name__}({self.path})>"
def __init__(self, header: SerializedFileHeader, reader: EndianBinaryReader):
if header.version >= 6:
self.temp_empty = reader.read_string_to_null()
if header.version >= 5:
self.guid = reader.read_bytes(16)
self.type = reader.read_int()
self.path = reader.read_string_to_null()
def write(self, header: SerializedFileHeader, writer: EndianBinaryWriter):
if header.version >= 6:
assert self.temp_empty is not None
writer.write_string_to_null(self.temp_empty)
if header.version >= 5:
assert self.guid is not None and self.type is not None
writer.write_bytes(self.guid)
writer.write_int(self.type)
writer.write_string_to_null(self.path)
@define(slots=True, init=False)
class SerializedType:
class_id: int
is_stripped_type: Optional[bool] = None
script_type_index: int = -1
script_id: Optional[bytes] = None # Hash128
old_type_hash: Optional[bytes] = None # Hash128
node: Optional[TypeTreeNode] = None
# ref type
m_ClassName: Optional[str] = None
m_NameSpace: Optional[str] = None
m_AssemblyName: Optional[str] = None
# 21+
type_dependencies: Optional[Tuple[int, ...]] = None
def __init__(
self,
reader: EndianBinaryReader,
serialized_file: SerializedFile,
is_ref_type: bool,
):
version = serialized_file.header.version
self.class_id = reader.read_int()
self.__attrs_init__(self.class_id)
if version >= 16:
self.is_stripped_type = reader.read_boolean()
if version >= 17:
self.script_type_index = reader.read_short()
if version >= 13:
if (
(is_ref_type and self.script_type_index >= 0)
or (version < 16 and self.class_id < 0)
or (version >= 16 and self.class_id == 114)
):
self.script_id = reader.read_bytes(16)
self.old_type_hash = reader.read_bytes(16)
if serialized_file._enable_type_tree:
if version >= 12 or version == 10:
self.node = TypeTreeNode.parse_blob(reader, version)
else:
self.node = TypeTreeNode.parse(reader, version)
if version >= 21:
if is_ref_type:
self.m_ClassName = reader.read_string_to_null()
self.m_NameSpace = reader.read_string_to_null()
self.m_AssemblyName = reader.read_string_to_null()
else:
self.type_dependencies = reader.read_int_array()
def write(
self,
serialized_file: SerializedFile,
writer: EndianBinaryWriter,
is_ref_type: bool,
):
version = serialized_file.header.version
writer.write_int(self.class_id)
if version >= 16:
assert self.is_stripped_type is not None
writer.write_boolean(self.is_stripped_type)
if version >= 17:
assert self.script_type_index is not None
writer.write_short(self.script_type_index)
if version >= 13:
if (
(is_ref_type and self.script_type_index >= 0)
or (version < 16 and self.class_id < 0)
or (version >= 16 and self.class_id == 114)
):
assert self.script_id is not None
writer.write_bytes(self.script_id) # Hash128
assert self.old_type_hash is not None
writer.write_bytes(self.old_type_hash) # Hash128
if serialized_file._enable_type_tree:
assert self.node is not None
if version >= 12 or version == 10:
self.node.dump_blob(writer, version)
else:
serialized_file.dump(writer, version)
if version >= 21:
if is_ref_type:
assert (
self.m_ClassName is not None
and self.m_NameSpace is not None
and self.m_AssemblyName is not None
)
writer.write_string_to_null(self.m_ClassName)
writer.write_string_to_null(self.m_NameSpace)
writer.write_string_to_null(self.m_AssemblyName)
else:
assert self.type_dependencies is not None
writer.write_int_array(self.type_dependencies, True)
@property
def nodes(self) -> Optional[TypeTreeNode]:
# for compatibility with old versions
return self.node
class SerializedFile(File.File):
reader: EndianBinaryReader
version: UnityVersion
unity_version: str
target_platform: BuildTarget
_enable_type_tree: bool
types: List[SerializedType]
script_types: List[LocalSerializedObjectIdentifier]
externals: List[FileIdentifier]
ref_types: Optional[List[SerializedType]]
objects: Dict[int, ObjectReader]
unknown: int
header: SerializedFileHeader
_m_target_platform: int
big_id_enabled: int
userInformation: Optional[str]
assetbundle: Optional[AssetBundle]
_cache: Dict[str, Object]
@property
def files(self):
if self.objects:
return self.objects
return {}
@files.setter
def files(self, value):
self.objects = value
def __init__(self, reader: EndianBinaryReader, parent=None, name=None, **kwargs):
super().__init__(parent=parent, name=name, **kwargs)
self.reader = reader
self.unity_version = "2.5.0f5"
self.target_platform = BuildTarget.UnknownPlatform
self._enable_type_tree = True
self.types = []
self.script_types = []
self.externals = []
self.objects = {}
# used to speed up mass asset extraction
# some assets refer to each other, so by keeping the result
# of specific assets cached the extraction can be speed up by a lot.
# used by: Sprite (Texture2D (with alpha) cached),
self._cache = {}
self.unknown = 0
# ReadHeader
header = SerializedFileHeader(reader)
self.header = header
if header.version >= 9:
header.endian = ">" if reader.read_boolean() else "<"
header.reserved = reader.read_bytes(3)
if header.version >= 22:
header.metadata_size = reader.read_u_int()
header.file_size = reader.read_long()
header.data_offset = reader.read_long()
self.unknown = reader.read_long() # unknown
else:
reader.Position = header.file_size - header.metadata_size
header.endian = ">" if reader.read_boolean() else "<"
reader.endian = header.endian
if header.version >= 7:
unity_version = reader.read_string_to_null()
self.set_version(unity_version)
if header.version >= 8:
self._m_target_platform = reader.read_int()
self.target_platform = BuildTarget(self._m_target_platform)
if header.version >= 13:
self._enable_type_tree = reader.read_boolean()
# ReadTypes
type_count = reader.read_int()
self.types = [SerializedType(reader, self, False) for _ in range(type_count)]
self.big_id_enabled = 0
if 7 <= header.version < 14:
self.big_id_enabled = reader.read_int()
# ReadObjects
object_count = reader.read_int()
self.objects = {}
for _ in range(object_count):
obj = ObjectReader.from_reader(self, reader)
self.objects[obj.path_id] = obj
# Read Scripts
if header.version >= 11:
script_count = reader.read_int()
self.script_types = [LocalSerializedObjectIdentifier(header, reader) for _ in range(script_count)]
# Read Externals
externals_count = reader.read_int()
self.externals = [FileIdentifier(header, reader) for _ in range(externals_count)]
if header.version >= 20:
ref_type_count = reader.read_int()
self.ref_types = [SerializedType(reader, self, True) for _ in range(ref_type_count)]
if config.SERIALIZED_FILE_PARSE_TYPETREE is False:
self._enable_type_tree = False
if header.version >= 5:
self.userInformation = reader.read_string_to_null()
# read the asset_bundles to get the containers
for obj in self.objects.values():
if obj.type == ClassIDType.AssetBundle:
self.assetbundle = obj.parse_as_object()
self._container = ContainerHelper(self.assetbundle)
break
else:
self.assetbundle = None
self._container = ContainerHelper([])
@property
def container(self):
return self._container
def load_dependencies(self, possible_dependencies: Optional[list] = None):
"""Load all external dependencies.
Parameters
----------
possible_dependencies : list
List of possible dependencies for cases
where the target file is not listed as external.
"""
for file_id in self.externals:
self.environment.load_file(file_id.path, True)
if possible_dependencies is None:
return
for dependency in possible_dependencies:
try:
self.environment.load_file(dependency, True)
except FileNotFoundError:
pass
def set_version(self, string_version: str):
self.unity_version = string_version
if not string_version or string_version == "0.0.0":
# weird case, but apparently can happen?
# check "cant read Texture2D by 2020.3.13 f1 AssetBundle #77" for details
if isinstance(self.parent, BundleFile.BundleFile):
string_version = self.parent.version_engine
if not string_version or string_version == "0.0.0":
string_version = config.get_fallback_version()
self.version = UnityVersion.from_str(string_version)
def get_writeable_cab(self, name: str = "CAB-UnityPy_Mod.resS"):
"""
Creates a new cab file in the bundle that contains the given data.
This is usefull for asset types that use resource files.
"""
if not isinstance(self.parent, (File.BundleFile.BundleFile, File.WebFile.WebFile)):
return None
cab = self.parent.get_writeable_cab(name)
cab.path = f"archive:/{self.name}/{name}"
if not any(cab.path == x.path for x in self.externals):
# register as external
class FileIdentifierFake:
pass
file_identifier = FileIdentifierFake()
file_identifier.__class__ = FileIdentifier
file_identifier.temp_empty = ""
import uuid
file_identifier.guid = uuid.uuid1().urn[-16:].encode("ascii")
file_identifier.path = cab.path
file_identifier.type = 0
self.externals.append(file_identifier)
return cab
def save(self, packer: Optional[str] = None) -> bytes:
# 1. header -> has to be delayed until the very end
# 2. data -> types, objects, scripts, ...
# so write the data first
header = self.header
meta_writer = EndianBinaryWriter(endian=header.endian)
data_writer = EndianBinaryWriter(endian=header.endian)
if header.version >= 7:
meta_writer.write_string_to_null(self.unity_version)
if header.version >= 8:
meta_writer.write_int(self._m_target_platform)
if header.version >= 13:
meta_writer.write_boolean(self._enable_type_tree)
# ReadTypes
meta_writer.write_int(len(self.types))
for typ in self.types:
typ.write(self, meta_writer, False)
if 7 <= header.version < 14:
meta_writer.write_int(self.big_id_enabled)
# ReadObjects
meta_writer.write_int(len(self.objects))
for obj in sorted(self.objects.values(), key=lambda x: x.path_id):
obj.write(header, meta_writer, data_writer)
data_writer.align_stream(8)
# Read Scripts
if header.version >= 11:
meta_writer.write_int(len(self.script_types))
for script_type in self.script_types:
script_type.write(header, meta_writer)
# Read Externals
meta_writer.write_int(len(self.externals))
for external in self.externals:
external.write(header, meta_writer)
if header.version >= 20:
assert self.ref_types is not None
meta_writer.write_int(len(self.ref_types))
for ref_type in self.ref_types:
ref_type.write(self, meta_writer, True)
if header.version >= 5:
assert self.userInformation is not None
meta_writer.write_string_to_null(self.userInformation)
# prepare header
writer = EndianBinaryWriter()
header_size = 16 # 4*4
metadata_size = meta_writer.Length
data_size = data_writer.Length
if header.version >= 9:
# 1 bool + 3 reserved + extra header 4 + 3*8
header_size += 4 if header.version < 22 else 4 + 28
data_offset = header_size + metadata_size
# align data_offset
data_offset += (16 - data_offset % 16) % 16
file_size = data_offset + data_size
if header.version < 22:
writer.write_u_int(metadata_size)
writer.write_u_int(file_size)
writer.write_u_int(header.version)
# reader.Position = header.file_size - header.metadata_size
# so data follows right after this header -> after 32
writer.write_u_int(data_offset)
writer.write_boolean(">" == header.endian)
writer.write_bytes(header.reserved)
else:
# old header
writer.write_u_int(0)
writer.write_u_int(0)
writer.write_u_int(header.version)
writer.write_u_int(0)
writer.write_boolean(">" == header.endian)
writer.write_bytes(header.reserved)
writer.write_u_int(metadata_size)
writer.write_long(file_size)
writer.write_long(data_offset)
writer.write_long(self.unknown)
writer.write_bytes(meta_writer.bytes)
writer.align_stream(16)
writer.write_bytes(data_writer.bytes)
else:
metadata_size += 1 # endian boolean
file_size = header_size + metadata_size + data_size
writer.write_u_int(metadata_size)
writer.write_u_int(file_size)
writer.write_u_int(header.version)
# reader.Position = header.file_size - header.metadata_size
# so data follows right after this header -> after 32
writer.write_u_int(32)
writer.write_bytes(data_writer.bytes)
writer.write_boolean(">" == header.endian)
writer.write_bytes(meta_writer.bytes)
return writer.bytes
def read_string(string_buffer_reader: EndianBinaryReader, value: int) -> str:
is_offset = (value & 0x80000000) == 0
if is_offset:
string_buffer_reader.Position = value
return string_buffer_reader.read_string_to_null()
offset = value & 0x7FFFFFFF
return CommonString.get(offset, str(offset))