def decode(self, fs: FileStream):
self.version = fs.read_sint16()
self.level = fs.read_uint8()
self.is_array = fs.read_boolean()
self.type_str_offset = fs.read_uint32()
self.name_str_offset = fs.read_uint32()
self.byte_size = fs.read_sint32()
self.index = fs.read_sint32()
self.meta_flags = fs.read_uint32()
def deserialize(self, fs: FileStream, meta_type: MetadataType):
result = {}
if not meta_type: return result
type_map = meta_type.type_tree.type_dict
for n in range(len(meta_type.fields)):
node = meta_type.fields[n]
if node.is_array:
element_type = meta_type.type_tree.nodes[node.index + 2]
element_count = fs.read_sint32()
array = result[node.name] = {'size': element_count}
if element_count == 0: continue
if element_type.byte_size == 1:
array['data'] = fs.read(
element_count) if element_count > 0 else b''
fs.align()
else:
items = []
if element_type.type in self.__premitive_decoders:
decode = self.__premitive_decoders.get(
element_type.type)
for _ in range(element_count):
items.append(decode(fs))
elif element_type.type == 'string':
for _ in range(element_count):
size = fs.read_sint32()
items.append(fs.read(size) if size > 0 else b'')
fs.align()
else:
for m in range(element_count):
it = self.deserialize(fs,
meta_type=type_map.get(
element_type.index))
items.append(it)
fs.align()
array['data'] = items
elif node.type == 'string':
size = fs.read_sint32()
result[node.name] = fs.read(size) if size > 0 else b''
fs.align()
elif node.type in self.__premitive_decoders:
result[node.name] = self.__premitive_decoders.get(
node.type)(fs)
if node.meta_flags & 0x4000 != 0: fs.align()
elif node.byte_size == 0: continue
else:
result[node.name] = self.deserialize(fs,
meta_type=type_map.get(
node.index))
return result
def decode(self, fs: FileStream):
offset = fs.position
self.persistent_type_id = fs.read_sint32()
self.is_stripped = fs.read_boolean()
self.script_index = fs.read_sint16()
if self.persistent_type_id == MONO_BEHAVIOUR_PERSISTENT_ID:
self.mono_hash = fs.read(16)
self.type_hash = fs.read(16)
self.nodes = []
self.strings = {}
if self.type_tree_enabled:
self.decode_type_tree(fs)
else:
cache_path = self.get_cache_path()
if p.exists(cache_path):
tmp = FileStream(file_path=cache_path)
tmp.endian = '<'
persistent_type_id = tmp.read_sint32()
assert persistent_type_id == self.persistent_type_id, '{} != {}'.format(
persistent_type_id, self.persistent_type_id)
tmp.seek(fs.position - offset)
self.decode_type_tree(fs=tmp)
def decode(self, fs: FileStream):
offset = fs.position
self.signature = fs.read_string()
assert self.signature == UnitySignature.UnityFS
self.version = fs.read_sint32()
assert self.version != 5
self.unity_web_bundle_version = fs.read_string()
self.unity_web_minimum_revision = fs.read_string()
self.size = fs.read_uint64()
self.compressed_blocks_info_size = fs.read_uint32()
self.uncompressed_blocks_info_size = fs.read_uint32()
assert self.compressed_blocks_info_size < self.uncompressed_blocks_info_size, vars(
self)
self.flags = fs.read_uint32()
self.header_size = fs.position - offset
def decode(self, fs: FileStream):
fs.seek(self.node.offset)
header = self.header
header.metadata_size = fs.read_sint32()
header.file_size = fs.read_sint32()
assert self.node.size == header.file_size, '{} != {}'.format(
self.node.size, header.file_size)
header.version = fs.read_sint32()
header.data_offset = fs.read_sint32()
header.endianess = fs.read_boolean()
fs.read(3) # reserved bytes
fs.endian = '>' if header.endianess else '<'
self.print(vars(header))
self.version = fs.read_string()
self.platform = fs.read_uint32()
self.type_tree_enabled = fs.read_boolean()
self.print('version={} platform={} type_tree_enabled={}'.format(
self.version, self.platform, self.type_tree_enabled))
self.type_trees = []
type_count = fs.read_uint32()
self.print('type', type_count)
for _ in range(type_count):
offset = fs.position
type_tree = MetadataTypeTree(
type_tree_enabled=self.type_tree_enabled)
type_tree.decode(fs)
if self.type_tree_enabled:
position = fs.position
fs.seek(offset)
type_data = fs.read(position - offset)
with open(type_tree.get_cache_path(auto_create=True),
'wb') as fp:
fp.write(type_data)
self.type_trees.append(type_tree)
self.register_type_tree(type_tree=type_tree)
self.print(type_tree)
object_count = fs.read_sint32()
self.print('object', object_count)
for _ in range(object_count):
fs.align(4)
obj = ObjectInfo()
obj.decode(fs)
type_tree = self.type_trees[obj.type_id]
obj.name = type_tree.name
self.objects.append(obj)
self.print(vars(obj))
script_type_count = fs.read_sint32()
self.print('typeinfo', script_type_count)
for _ in range(script_type_count):
st = ScriptTypeInfo()
st.decode(fs)
self.typeinfos.append(st)
self.print(vars(st))
external_count = fs.read_sint32()
self.print('external', external_count)
for _ in range(external_count):
ext = ExternalInfo()
ext.decode(fs)
self.externals.append(ext)
self.print(ext)
fs.read_string()
def decode(self, fs: FileStream):
fs.read_string()
self.guid = fs.read(16)
self.type = fs.read_sint32()
self.path = fs.read_string()
def decode(self, fs: FileStream):
self.local_serialized_file_index = fs.read_sint32()
fs.align(4)
self.local_identifier_in_file = fs.read_sint64()
