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_type_tree(self, fs: FileStream):
type_index = -1
node_count = fs.read_uint32()
char_count = fs.read_uint32()
for _ in range(node_count):
node = TypeField()
node.decode(fs)
if type_index >= 0: assert node.index == type_index + 1
self.nodes.append(node)
type_index += 1
if char_count > 0:
string_offset = fs.position
string_size = 0
while string_size + 1 < char_count:
offset = fs.position - string_offset
position = fs.position
self.strings[offset] = fs.read_string()
string_size += fs.position - position
assert fs.position - string_offset == char_count
for node in self.nodes: # type: TypeField
node.name = get_caculate_string(offset=node.name_str_offset,
strings=self.strings)
node.type = get_caculate_string(offset=node.type_str_offset,
strings=self.strings)
self.name = self.nodes[0].type
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.offset = fs.read_uint64()
self.size = fs.read_uint64()
self.flags = fs.read_uint32()
self.path = fs.read_string()