def from_address(cls, address: int, view: BinaryView): if address == 0: return None property_t_type = view.types['property_t'] property_t = Type.named_type_from_type( 'property_t', property_t_type ) if view.get_data_var_at(address) is None: view.define_user_data_var( address, property_t ) members = get_structure_members(address, property_t_type, view) members['name'] = ( view.get_ascii_string_at(members['name'], 1).value if members['name'] else '' ) members['attributes'] = ( view.get_ascii_string_at(members['attributes'], 1).value if members['attributes'] else '' ) return cls(address, **members)
def from_address(cls, address: int, class_name: str, view: BinaryView): if address == 0: return None from_bytes = get_from_bytes(view) ivar_list_t_type = view.types['ivar_list_t'] ivar_list_t = Type.named_type_from_type( 'ivar_list_t', ivar_list_t_type ) ivar_t = view.types['ivar_t'] members = get_structure_members(address, ivar_list_t_type, view) view.define_user_data_var(address, ivar_list_t) ivars = {} start = address + ivar_list_t_type.width end = start + members['count'] * ivar_t.width step = ivar_t.width for ivar in range(start, end, step): new_ivar = Ivar.from_address(ivar, class_name, view) ivars[new_ivar.name] = new_ivar return cls(address, **members, ivars=ivars)
def _define_classes(view: BinaryView, class_t: Type): __objc_data = view.sections.get('__objc_data') if __objc_data is None: raise KeyError('This binary has no __objc_data section') for addr in range(__objc_data.start, __objc_data.end, class_t.width): current_class = Class.from_address(addr, view) log_debug(f"Created {current_class}") __objc_classrefs = view.sections.get('__objc_classrefs') if __objc_classrefs is None: raise KeyError('This binary has no __objc_classrefs section') for addr in range(__objc_classrefs.start, __objc_classrefs.end, view.address_size): view.define_user_data_var(addr, Type.pointer(view.arch, class_t)) class_addr = int.from_bytes( view.read(addr, view.address_size), "little" if view.endianness is Endianness.LittleEndian else "big") class_ = view.session_data['ClassList'].get( class_addr) if class_addr else None if class_ is not None: log_debug(f"{addr:x} points to {class_!r}") view.define_user_symbol( Symbol(SymbolType.DataSymbol, addr, f"_OBJC_CLASS_$_{class_.vtable.name}@GOT"))
def from_address(cls, address: int, self_type: str, view: BinaryView, is_class=False): if address == 0: return None method_list_t_type = view.get_type_by_name('method_list_t') method_list_t = Type.named_type_from_type('method_list_t', method_list_t_type) method_t = view.get_type_by_name('method_t') if view.get_data_var_at(address) is None: view.define_user_data_var(address, method_list_t) members = get_structure_members(address, method_list_t_type, view) methods = dict() start = address + method_list_t_type.width end = start + members['count'] * method_t.width step = method_t.width for method_addr in range(start, end, step): method = Method.from_address(method_addr, self_type, view, is_class) if method is not None: methods[method.name] = method return cls(address, **members, methods=methods)
def __create_class_name_type(bv: BinaryView, vmt: DelphiVMT, out_struct: types.Structure) -> bool: vmt_offsets = vmt.vmt_offsets if not vmt.seek_to_vmt_offset(vmt_offsets.cVmtClassName): return False class_name_ptr = vmt.read_ptr() if class_name_ptr is None: return False if not vmt.seek_to_code(class_name_ptr): return False class_name_len = vmt.read8() if class_name_len is None: return False class_name_struct = types.Structure() class_name_struct.append(Type.int(1, False), 'length') class_name_struct.append(Type.array(Type.char(), class_name_len), 'value') struct_type = Type.structure_type(class_name_struct) bv.define_user_data_var(class_name_ptr, struct_type) out_struct.append(Type.pointer(bv.arch, struct_type), 'cVmtClassName') # Create Symbole for class name class_name_sym = Symbol(SymbolType.DataSymbol, class_name_ptr, f'{vmt.class_name}Name') bv.define_user_symbol(class_name_sym) return True
def from_address(cls, address: int, view: BinaryView): if address == 0: return None property_list_t_type = view.types['property_list_t'] property_list_t = Type.named_type_from_type( 'property_list_t', property_list_t_type ) property_t = view.types['property_t'] if view.get_data_var_at(address) is None: view.define_user_data_var(address, property_list_t) members = get_structure_members(address, property_list_t_type, view) properties = dict() start = address + property_list_t_type.width end = start + members['count'] * property_t.width step = property_t.width for property_addr in range(start, end, step): property_ = Property.from_address(property_addr, view) if property_ is not None: properties[property_.name] = property_ return cls(address, **members, properties=properties)
def from_address(cls, address: int, view: BinaryView): if address == 0: return None from_bytes = get_from_bytes(view) protocol_list_t_type = view.get_type_by_name('protocol_list_t') protocol_list_t = Type.named_type_from_type('protocol_list_t', protocol_list_t_type) protocol_t = view.get_type_by_name('protocol_t') members = get_structure_members(address, protocol_list_t_type, view) view.define_user_data_var(address, protocol_list_t) protocols = {} start = address + protocol_list_t_type.width end = start + members['count'] * view.address_size step = view.address_size for protocol_ptr in range(start, end, step): if not view.get_data_var_at(protocol_ptr): view.define_user_data_var(protocol_ptr, Type.pointer(view.arch, protocol_t)) protocol = Protocol.from_address( from_bytes(view.read(protocol_ptr, view.address_size)), view) protocols[protocol.name] = protocol return cls(address, **members, protocols=protocols)
def from_address(cls, address: int, class_name: str, view: BinaryView): if address == 0: return None from_bytes = get_from_bytes(view) ivar_t_type = view.types['ivar_t'] ivar_t = Type.named_type_from_type( 'ivar_t', ivar_t_type ) members = get_structure_members(address, ivar_t_type, view) member_dict = {m.name: m for m in ivar_t_type.structure.members} # x64 uses uint64_t for offset, but everything else # uses uint32_t ivar_offset_type = ( member_dict['offset'].type.target if view.arch != Architecture['x86_64'] else Type.int(8, False) ) ivar_offset_type.const = True if view.get_data_var_at(address) is None: view.define_user_data_var(address, ivar_t) if members['name'] != 0: name_string = view.get_ascii_string_at(members['name'], 1) if name_string is not None: members['name'] = name_string.value else: members['name'] = '' if members['type']: type_string = view.get_ascii_string_at(members['type'], 1).value members['type'] = _lookup_type(type_string, view) if not members['type']: members['type'] = Type.pointer(view.arch, Type.void()) if members['offset']: view.define_user_data_var(members['offset'], ivar_offset_type) view.define_user_symbol( Symbol( SymbolType.DataSymbol, members['offset'], f'{members["name"]}_offset', namespace=class_name ) ) members['offset'] = from_bytes( view.read(members['offset'], member_dict['offset'].type.target.width) ) else: members['offset'] = None return cls(address, **members)
def from_address(cls, address: int, view: BinaryView) -> Category: if address == 0: return None from .class_t import Class, ClassRO category_t_type = view.types['category_t'] category_t = Type.named_type_from_type('category_t', category_t_type) if view.get_data_var_at(address) is None: view.define_user_data_var(address, category_t) members = get_structure_members(address, category_t_type, view) members['name'] = (view.get_ascii_string_at(members['name'], 1).value if members['name'] else '') members['cls'] = Class.from_address(members['cls'], view) if members['cls'] is None: cls_offset = next(m.offset for m in category_t_type.structure.members if m.name == 'cls') cls_name = view.get_symbol_at(address + cls_offset) cls_name = cls_name.name if cls_name is not None else members[ 'name'] class_match = re.match( r'_OBJC_(META)?CLASS_\$_(?P<classname>[_A-Za-z0-9=/]+)(@GOT)?', cls_name) if class_match is not None: cls_name = class_match.group('classname') cls_ = view.session_data['ClassNames'].get(cls_name) if cls_ is None: cls_ = Class(None, view, None, None, None, {}, {}) cls_.vtable = ClassRO(address, *([None] * 11)) cls_.vtable.name = cls_name view.session_data['ClassNames'][cls_name] = cls_ members['cls'] = cls_ else: cls_name = members['cls'].vtable.name members['instanceMethods'] = MethodList.from_address( members['instanceMethods'], cls_name, view) if members['cls'] is not None and not members['cls'].methods: members['cls']._methods = members['instanceMethods'].methods elif members['cls'] is not None: members['cls']._methods.update(members['instanceMethods'].methods) members['protocols'] = ProtocolList.from_address( members['protocols'], view) return cls(address, **members)
def from_address(cls, address: int, view: BinaryView) -> Class: if address == 0: return None elif address in view.session_data['ClassList']: return view.session_data['ClassList'][address] else: new_class = cls(address, view, None, None, None, {}, {}) view.session_data['ClassList'][address] = new_class from_bytes = get_from_bytes(view) members = get_structure_members(address, view.get_type_by_name('class_t'), view) isa = Class.from_address(members['isa'], view) new_class.isa = isa superclass = Class.from_address(members['superclass'], view) new_class.superclass = superclass vtable = ClassRO.from_address(members['vtable'], view, new_class.is_meta) new_class.vtable = vtable class_t = Type.named_type_from_type('class_t', view.get_type_by_name('class_t')) view.define_user_data_var(address, class_t) if not new_class.is_meta: view.session_data['ClassNames'][vtable.name] = new_class else: view.session_data['ClassNames'][f"{vtable.name}_meta"] = new_class if not new_class.is_meta: new_class.define_type() symbol_name = f'_OBJC_CLASS_$_{vtable.name}' else: symbol_name = f'_OBJC_METACLASS_$_{vtable.name}' view.define_user_symbol( Symbol(SymbolType.DataSymbol, address, symbol_name)) if vtable and vtable.baseMethods is not None: new_class._methods = vtable.baseMethods.methods if vtable and vtable.baseProtocols is not None: new_class._protocols = vtable.baseProtocols.protocols return new_class
def from_address(cls, address: int, self_type: str, view: BinaryView, is_class=False): if address == 0: return None if self_type not in view.types: view.define_user_type(self_type, Type.structure_type(Structure())) method_t_type = view.get_type_by_name('method_t') method_t = Type.named_type_from_type('method_t', method_t_type) if view.get_data_var_at(address) is None: view.define_user_data_var(address, method_t) members = get_structure_members(address, method_t_type, view) members['name'] = (view.get_ascii_string_at(members['name'], 1).value if members['name'] else '') members['types'] = parse_function_type( view.get_ascii_string_at(members['types'], 1).value if members['types'] else '', self_type, view, is_class) members['imp'] = view.get_function_at(members['imp']) if members['imp'] is not None: if not is_class: method_name = f'-[{self_type} {members["name"]}]' else: method_name = f'+[{self_type} {members["name"]}]' if view.symbols.get(method_name): namespace = f'{members["imp"].start}' else: namespace = None view.define_user_symbol( Symbol(SymbolType.FunctionSymbol, members['imp'].start, method_name, namespace=namespace)) if members['types'] is not None: members['imp'].function_type = members['types'] return cls(address, **members)
def from_address(cls, address: int, view: BinaryView, is_meta=False): from .protocol_t import ProtocolList if address == 0: return None elif address in view.session_data['ClassROList']: return view.session_data['ClassROList'] from_bytes = partial(int.from_bytes, byteorder=("little" if view.endianness == Endianness.LittleEndian else "big")) class_ro_t = Type.named_type_from_type('class_ro_t', view.types['class_ro_t']) if view.get_data_var_at(address) is None: view.define_user_data_var(address, class_ro_t) members = { m.name: from_bytes(view.read(address + m.offset, m.type.width)) for m in view.types['class_ro_t'].structure.members } members['name'] = (view.get_ascii_string_at(members['name'], 1).value if members['name'] != 0 else '') members['ivarLayout'] = (view.get_ascii_string_at( members['ivarLayout'], 1).value if members['ivarLayout'] != 0 else '') members['ivars'] = IvarList.from_address(members['ivars'], members['name'], view) members['baseMethods'] = MethodList.from_address( members['baseMethods'], members['name'], view, is_meta) members['baseProtocols'] = ProtocolList.from_address( members['baseProtocols'], view) members['baseProperties'] = PropertyList.from_address( members['baseProperties'], view) new_class_ro = cls(address, **members) view.session_data['ClassROList'][address] = new_class_ro return new_class_ro
def _define_protocols(view: BinaryView): __objc_protorefs = view.get_section_by_name('__objc_protorefs') if __objc_protorefs is None: return protocol_t = Type.named_type_from_type('protocol_t', view.get_type_by_name('protocol_t')) for address in range(__objc_protorefs.start, __objc_protorefs.end, view.address_size): view.define_user_data_var(address, Type.pointer(view.arch, protocol_t)) protocol_ptr = int.from_bytes( view.read(address, view.address_size), "little" if view.endianness is Endianness.LittleEndian else "big") new_protocol = Protocol.from_address(protocol_ptr, view)
def _define_categories(view: BinaryView): __objc_catlist = view.sections.get('__objc_catlist') if __objc_catlist is None: return category_t = Type.named_type_from_type('category_t', view.types['category_t']) for address in range(__objc_catlist.start, __objc_catlist.end, view.address_size): view.define_user_data_var(address, Type.pointer(view.arch, category_t)) category_ptr = int.from_bytes( view.read(address, view.address_size), "little" if view.endianness is Endianness.LittleEndian else "big") new_category = Category.from_address(category_ptr, view)
def _define_selectors(view: BinaryView): __objc_selrefs = view.sections.get('__objc_selrefs') if __objc_selrefs is None: raise KeyError('This binary has no __objc_selrefs section') SEL = view.get_type_by_name('SEL') if SEL is None: raise TypeError('The SEL type is not defined!') for addr in range(__objc_selrefs.start, __objc_selrefs.end, SEL.width): view.define_user_data_var(addr, SEL) selector = int.from_bytes(view.read(addr, SEL.width), "little") if selector != 0: name = view.get_ascii_string_at(selector, 3) if name is not None: view.define_user_data_var( name.start, Type.array(Type.char(), name.length + 1))
def make_struct_here(view: BinaryView, address: int, length: int): structure_name = f"struct_{address:x}" structure = StructureBuilder() structure.width = length add_members(view, structure, address, length) structure_type = Type.structure_type(structure) view.begin_undo_actions() view.define_user_type(structure_name, structure_type) named_type = Type.named_type_from_type(structure_name, structure_type) view.define_user_data_var(address, named_type) view.commit_undo_actions()
def from_address(cls, address: int, view: BinaryView) -> Protocol: if address == 0: return None from .class_t import Class from_bytes = partial(int.from_bytes, byteorder=("little" if view.endianness == Endianness.LittleEndian else "big")) protocol_t = Type.named_type_from_type( 'protocol_t', view.get_type_by_name('protocol_t')) if not view.get_data_var_at(address): view.define_user_data_var(address, protocol_t) members = { m.name: from_bytes(view.read(address + m.offset, m.type.width)) for m in view.get_type_by_name('protocol_t').structure.members } members['isa'] = Class.from_address(members['isa'], view) members['name'] = (view.get_ascii_string_at(members['name'], 1).value if members['name'] != 0 else '') if members['name'] not in view.types: view.define_user_type(members['name'], Type.structure_type(Structure())) members['protocols'] = ProtocolList.from_address( members['protocols'], view) members['instanceMethods'] = MethodList.from_address( members['instanceMethods'], members['name'], view) members['optionalInstanceMethods'] = MethodList.from_address( members['optionalInstanceMethods'], members['name'], view) new_protocol = cls(address, **members) view.session_data['Protocols'][new_protocol.name] = new_protocol return new_protocol
def create_vmt_struct(bv: BinaryView, vmt: DelphiVMT) -> bool: if not vmt.is_valid: return False vmt_struct = types.Structure() if not BNHelpers._add_vmt_fields(bv, vmt, vmt_struct): return False if not BNHelpers._add_vmt_methods(bv, vmt, vmt_struct): return False struct_type = Type.structure_type(vmt_struct) bv.define_user_data_var(vmt.start, struct_type) # bv.define_user_type(f'vmt{vmt.class_name}', struct_type) # Create Symbole for VMT vmt_sym = Symbol(SymbolType.DataSymbol, vmt.start, f'vmt{vmt.class_name}') bv.define_user_symbol(vmt_sym) return True
def define_cfstrings_plugin(view: BinaryView): log_debug("define_cfstrings_plugin") from_bytes = _get_from_bytes(view) cfstring_type = view.get_type_by_name('CFString') if cfstring_type is None: cfstring_type = view.platform.parse_types_from_source( _cfstring_definition).types['CFString'] view.define_user_type('CFString', cfstring_type) wchar_type = view.platform.parse_types_from_source( _wchar_definition).types['wchar'] cfstring = Type.named_type_from_type('CFString', cfstring_type) __cfstring = view.get_section_by_name('__cfstring') if __cfstring is None: return buffer = cfstring_type.structure['buffer'] length = cfstring_type.structure['length'] for addr in range(__cfstring.start, __cfstring.end, cfstring_type.width): view.define_user_data_var(addr, cfstring) for xref in view.get_data_refs(addr): view.define_user_data_var(xref, Type.pointer(view.arch, cfstring)) string_pointer = from_bytes( view.read(addr + buffer.offset, buffer.type.width)) string_length = from_bytes( view.read(addr + length.offset, length.type.width), ) + 1 string_section = view.get_sections_at(string_pointer) if not string_section: return if string_section[0].name == '__ustring': char_type = wchar_type else: char_type = Type.char() view.define_user_data_var(string_pointer, Type.array(char_type, string_length))