/mandos/release : revision 237.7.751

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#!/usr/bin/python

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# -*- mode: python; coding: utf-8 -*-

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#

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#!/usr/bin/python3 -bI

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# -*- mode: python; after-save-hook: (lambda () (let ((command (if (fboundp 'file-local-name) (file-local-name (buffer-file-name)) (or (file-remote-p (buffer-file-name) 'localname) (buffer-file-name))))) (if (= (progn (if (get-buffer "*Test*") (kill-buffer "*Test*")) (process-file-shell-command (format "%s --check" (shell-quote-argument command)) nil "*Test*")) 0) (let ((w (get-buffer-window "*Test*"))) (if w (delete-window w))) (progn (with-current-buffer "*Test*" (compilation-mode)) (display-buffer "*Test*" '(display-buffer-in-side-window)))))); coding: utf-8 -*-

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#

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# Mandos server - give out binary blobs to connecting clients.

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#

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#

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# This program is partly derived from an example program for an Avahi

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# service publisher, downloaded from

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# <http://avahi.org/wiki/PythonPublishExample>. This includes the

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# methods "add", "remove", "server_state_changed",

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# "entry_group_state_changed", "cleanup", and "activate" in the

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# "AvahiService" class, and some lines in "main".

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#

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#

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# Everything else is

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#

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# This program is free software: you can redistribute it and/or modify

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# it under the terms of the GNU General Public License as published by

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#

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# This file is part of Mandos.

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#

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# Mandos is free software: you can redistribute it and/or modify it

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# under the terms of the GNU General Public License as published by

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# the Free Software Foundation, either version 3 of the License, or

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# (at your option) any later version.

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#

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# This program is distributed in the hope that it will be useful,

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# but WITHOUT ANY WARRANTY; without even the implied warranty of

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# Mandos is distributed in the hope that it will be useful, but

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# WITHOUT ANY WARRANTY; without even the implied warranty of

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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# GNU General Public License for more details.

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#

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#

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# You should have received a copy of the GNU General Public License

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# along with this program. If not, see

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# <http://www.gnu.org/licenses/>.

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#

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# along with Mandos. If not, see <http://www.gnu.org/licenses/>.

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#

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# Contact the authors at <mandos@recompile.se>.

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#

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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try:

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from future_builtins import *

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except ImportError:

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pass

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import SocketServer as socketserver

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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66

import struct

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import fcntl

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import functools

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import cPickle as pickle

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import unittest

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import random

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import dbus

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import dbus.service

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import gobject

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import avahi

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import gi

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from gi.repository import GLib

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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import GnuPGInterface

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try:

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if sys.version_info.major == 2:

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__metaclass__ = type

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str = unicode

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# Add collections.abc.Callable if it does not exist

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try:

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collections.abc.Callable

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except AttributeError:

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class abc:

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Callable = collections.Callable

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collections.abc = abc

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del abc

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# Show warnings by default

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if not sys.warnoptions:

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import warnings

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warnings.simplefilter("default")

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# Try to find the value of SO_BINDTODEVICE:

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try:

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# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and

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# newer, and it is also the most natural place for it:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except AttributeError:

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try:

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# This is where SO_BINDTODEVICE was up to and including Python

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# 2.6, and also 3.2:

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from IN import SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.6.0"

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# In Python 2.7 it seems to have been removed entirely.

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# Try running the C preprocessor:

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try:

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cc = subprocess.Popen(["cc", "--language=c", "-E",

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"/dev/stdin"],

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE)

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stdout = cc.communicate(

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"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]

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SO_BINDTODEVICE = int(stdout.splitlines()[-1])

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except (OSError, ValueError, IndexError):

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# No value found

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SO_BINDTODEVICE = None

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if sys.version_info < (3, 2):

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configparser.Configparser = configparser.SafeConfigParser

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version = "1.8.9"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = str("/dev/log")))

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logging.captureWarnings(True) # Show warnings via the logging system

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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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(ctypes.util.find_library("c"))

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.if_nametoindex)

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if_nametoindex = ctypes.cdll.LoadLibrary(

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ctypes.util.find_library("c")).if_nametoindex

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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"Get an interface index the hard way, i.e. using fcntl()"

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SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h

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with contextlib.closing(socket.socket()) as s:

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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struct.pack(str("16s16x"),

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interface))

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interface_index = struct.unpack(str("I"),

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ifreq[16:20])[0]

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struct.pack(b"16s16x", interface))

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interface_index = struct.unpack("I", ifreq[16:20])[0]

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return interface_index

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def copy_function(func):

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"""Make a copy of a function"""

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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def initlogger(debug, level=logging.WARNING):

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility=logging.handlers.SysLogHandler.LOG_DAEMON,

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address="/dev/log"))

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syslogger.setFormatter(logging.Formatter

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('Mandos [%(process)d]: %(levelname)s:'

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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console.setFormatter(logging.Formatter('%(asctime)s %(name)s'

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pass

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203

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class PGPEngine(object):

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class PGPEngine:

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"""A simple class for OpenPGP symmetric encryption & decryption"""

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def __init__(self):

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self.gnupg = GnuPGInterface.GnuPG()

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self.tempdir = tempfile.mkdtemp(prefix="mandos-")

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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self.gnupg.options.extra_args.extend(['--force-mdc',

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'--quiet',

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'--no-use-agent'])

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self.gpg = "gpg"

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try:

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output = subprocess.check_output(["gpgconf"])

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for line in output.splitlines():

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name, text, path = line.split(b":")

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if name == b"gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet']

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# Only GPG version 1 has the --no-use-agent option.

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if self.gpg == b"gpg" or self.gpg.endswith(b"/gpg"):

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self.gnupgargs.append("--no-use-agent")

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def __enter__(self):

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229

return self

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230

154

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def __exit__(self, exc_type, exc_value, traceback):

155

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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237

161

238

def _cleanup(self):

162

239

if self.tempdir is not None:

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# Delete contents of tempdir

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for root, dirs, files in os.walk(self.tempdir,

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topdown = False):

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topdown=False):

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for filename in files:

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os.remove(os.path.join(root, filename))

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for dirname in dirs:

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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250

174

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def password_encode(self, password):

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# Passphrase can not be empty and can not contain newlines or

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# NUL bytes. So we prefix it and hex encode it.

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return b"mandos" + binascii.hexlify(password)

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encoded = b"mandos" + binascii.hexlify(password)

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if len(encoded) > 2048:

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# GnuPG can't handle long passwords, so encode differently

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encoded = (b"mandos" + password.replace(b"\\", b"\\\\")

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.replace(b"\n", b"\\n")

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.replace(b"\0", b"\\x00"))

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return encoded

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def encrypt(self, data, password):

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self.gnupg.passphrase = self.password_encode(password)

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with open(os.devnull, "w") as devnull:

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try:

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proc = self.gnupg.run(['--symmetric'],

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create_fhs=['stdin', 'stdout'],

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attach_fhs={'stderr': devnull})

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with contextlib.closing(proc.handles['stdin']) as f:

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f.write(data)

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with contextlib.closing(proc.handles['stdout']) as f:

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ciphertext = f.read()

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proc.wait()

191

except IOError as e:

192

raise PGPError(e)

193

self.gnupg.passphrase = None

263

passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen([self.gpg, '--symmetric',

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

275

ciphertext, err = proc.communicate(input=data)

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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279

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def decrypt(self, data, password):

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self.gnupg.passphrase = self.password_encode(password)

198

with open(os.devnull, "w") as devnull:

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try:

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proc = self.gnupg.run(['--decrypt'],

201

create_fhs=['stdin', 'stdout'],

202

attach_fhs={'stderr': devnull})

203

with contextlib.closing(proc.handles['stdin']) as f:

204

f.write(data)

205

with contextlib.closing(proc.handles['stdout']) as f:

206

decrypted_plaintext = f.read()

207

proc.wait()

208

except IOError as e:

209

raise PGPError(e)

210

self.gnupg.passphrase = None

281

passphrase = self.password_encode(password)

282

with tempfile.NamedTemporaryFile(

283

dir=self.tempdir) as passfile:

284

passfile.write(passphrase)

285

passfile.flush()

286

proc = subprocess.Popen([self.gpg, '--decrypt',

287

'--passphrase-file',

288

passfile.name]

289

+ self.gnupgargs,

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

292

stderr=subprocess.PIPE)

293

decrypted_plaintext, err = proc.communicate(input=data)

294

if proc.returncode != 0:

295

raise PGPError(err)

211

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return decrypted_plaintext

212

297

213

298

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# Pretend that we have an Avahi module

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class avahi:

301

"""This isn't so much a class as it is a module-like namespace."""

302

IF_UNSPEC = -1 # avahi-common/address.h

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PROTO_UNSPEC = -1 # avahi-common/address.h

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

307

DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

308

DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

309

DBUS_PATH_SERVER = "/"

310

311

@staticmethod

312

def string_array_to_txt_array(t):

313

return dbus.Array((dbus.ByteArray(s.encode("utf-8"))

314

for s in t), signature="ay")

315

ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

317

ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

318

SERVER_INVALID = 0 # avahi-common/defs.h

319

SERVER_REGISTERING = 1 # avahi-common/defs.h

320

SERVER_RUNNING = 2 # avahi-common/defs.h

321

SERVER_COLLISION = 3 # avahi-common/defs.h

322

SERVER_FAILURE = 4 # avahi-common/defs.h

323

324

214

325

class AvahiError(Exception):

215

326

def __init__(self, value, *args, **kwargs):

216

327

self.value = value

217

super(AvahiError, self).__init__(value, *args, **kwargs)

218

def __unicode__(self):

219

return unicode(repr(self.value))

328

return super(AvahiError, self).__init__(value, *args,

329

**kwargs)

330

220

331

221

332

class AvahiServiceError(AvahiError):

222

333

pass

223

334

335

224

336

class AvahiGroupError(AvahiError):

225

337

pass

226

338

227

339

228

class AvahiService(object):

340

class AvahiService:

229

341

"""An Avahi (Zeroconf) service.

230

342

231

343

Attributes:

232

344

interface: integer; avahi.IF_UNSPEC or an interface index.

233

345

Used to optionally bind to the specified interface.

234

346

name: string; Example: 'Mandos'

235

347

type: string; Example: '_mandos._tcp'.

236

See <http://www.dns-sd.org/ServiceTypes.html>

348

See <https://www.iana.org/assignments/service-names-port-numbers>

237

349

port: integer; what port to announce

238

350

TXT: list of strings; TXT record for the service

239

351

domain: string; Domain to publish on, default to .local if empty.

245

357

server: D-Bus Server

246

358

bus: dbus.SystemBus()

247

359

"""

248

249

def __init__(self, interface = avahi.IF_UNSPEC, name = None,

250

servicetype = None, port = None, TXT = None,

251

domain = "", host = "", max_renames = 32768,

252

protocol = avahi.PROTO_UNSPEC, bus = None):

360

361

def __init__(self,

362

interface=avahi.IF_UNSPEC,

363

name=None,

364

servicetype=None,

365

port=None,

366

TXT=None,

367

domain="",

368

host="",

369

max_renames=32768,

370

protocol=avahi.PROTO_UNSPEC,

371

bus=None):

253

372

self.interface = interface

254

373

self.name = name

255

374

self.type = servicetype

264

383

self.server = None

265

384

self.bus = bus

266

385

self.entry_group_state_changed_match = None

267

268

def rename(self):

386

387

def rename(self, remove=True):

269

388

"""Derived from the Avahi example code"""

270

389

if self.rename_count >= self.max_renames:

271

390

logger.critical("No suitable Zeroconf service name found"

272

391

" after %i retries, exiting.",

273

392

self.rename_count)

274

393

raise AvahiServiceError("Too many renames")

275

self.name = unicode(self.server

276

.GetAlternativeServiceName(self.name))

394

self.name = str(

395

self.server.GetAlternativeServiceName(self.name))

396

self.rename_count += 1

277

397

logger.info("Changing Zeroconf service name to %r ...",

278

398

self.name)

279

self.remove()

399

if remove:

400

self.remove()

280

401

try:

281

402

self.add()

282

403

except dbus.exceptions.DBusException as error:

283

logger.critical("D-Bus Exception", exc_info=error)

284

self.cleanup()

285

os._exit(1)

286

self.rename_count += 1

287

404

if (error.get_dbus_name()

405

== "org.freedesktop.Avahi.CollisionError"):

406

logger.info("Local Zeroconf service name collision.")

407

return self.rename(remove=False)

408

else:

409

logger.critical("D-Bus Exception", exc_info=error)

410

self.cleanup()

411

os._exit(1)

412

288

413

def remove(self):

289

414

"""Derived from the Avahi example code"""

290

415

if self.entry_group_state_changed_match is not None:

292

417

self.entry_group_state_changed_match = None

293

418

if self.group is not None:

294

419

self.group.Reset()

295

420

296

421

def add(self):

297

422

"""Derived from the Avahi example code"""

298

423

self.remove()

315

440

dbus.UInt16(self.port),

316

441

avahi.string_array_to_txt_array(self.TXT))

317

442

self.group.Commit()

318

443

319

444

def entry_group_state_changed(self, state, error):

320

445

"""Derived from the Avahi example code"""

321

446

logger.debug("Avahi entry group state change: %i", state)

322

447

323

448

if state == avahi.ENTRY_GROUP_ESTABLISHED:

324

449

logger.debug("Zeroconf service established.")

325

450

elif state == avahi.ENTRY_GROUP_COLLISION:

327

452

self.rename()

328

453

elif state == avahi.ENTRY_GROUP_FAILURE:

329

454

logger.critical("Avahi: Error in group state changed %s",

330

unicode(error))

331

raise AvahiGroupError("State changed: {0!s}"

332

.format(error))

333

455

str(error))

456

raise AvahiGroupError("State changed: {!s}".format(error))

457

334

458

def cleanup(self):

335

459

"""Derived from the Avahi example code"""

336

460

if self.group is not None:

341

465

pass

342

466

self.group = None

343

467

self.remove()

344

468

345

469

def server_state_changed(self, state, error=None):

346

470

"""Derived from the Avahi example code"""

347

471

logger.debug("Avahi server state change: %i", state)

348

bad_states = { avahi.SERVER_INVALID:

349

"Zeroconf server invalid",

350

avahi.SERVER_REGISTERING: None,

351

avahi.SERVER_COLLISION:

352

"Zeroconf server name collision",

353

avahi.SERVER_FAILURE:

354

"Zeroconf server failure" }

472

bad_states = {

473

avahi.SERVER_INVALID: "Zeroconf server invalid",

474

avahi.SERVER_REGISTERING: None,

475

avahi.SERVER_COLLISION: "Zeroconf server name collision",

476

avahi.SERVER_FAILURE: "Zeroconf server failure",

477

}

355

478

if state in bad_states:

356

479

if bad_states[state] is not None:

357

480

if error is None:

360

483

logger.error(bad_states[state] + ": %r", error)

361

484

self.cleanup()

362

485

elif state == avahi.SERVER_RUNNING:

363

self.add()

486

try:

487

self.add()

488

except dbus.exceptions.DBusException as error:

489

if (error.get_dbus_name()

490

== "org.freedesktop.Avahi.CollisionError"):

491

logger.info("Local Zeroconf service name"

492

" collision.")

493

return self.rename(remove=False)

494

else:

495

logger.critical("D-Bus Exception", exc_info=error)

496

self.cleanup()

497

os._exit(1)

364

498

else:

365

499

if error is None:

366

500

logger.debug("Unknown state: %r", state)

367

501

else:

368

502

logger.debug("Unknown state: %r: %r", state, error)

369

503

370

504

def activate(self):

371

505

"""Derived from the Avahi example code"""

372

506

if self.server is None:

376

510

follow_name_owner_changes=True),

377

511

avahi.DBUS_INTERFACE_SERVER)

378

512

self.server.connect_to_signal("StateChanged",

379

self.server_state_changed)

513

self.server_state_changed)

380

514

self.server_state_changed(self.server.GetState())

381

515

382

516

383

517

class AvahiServiceToSyslog(AvahiService):

384

def rename(self):

518

def rename(self, *args, **kwargs):

385

519

"""Add the new name to the syslog messages"""

386

ret = AvahiService.rename(self)

387

syslogger.setFormatter(logging.Formatter

388

('Mandos ({0}) [%(process)d]:'

389

' %(levelname)s: %(message)s'

390

.format(self.name)))

520

ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)

521

syslogger.setFormatter(logging.Formatter(

522

'Mandos ({}) [%(process)d]: %(levelname)s: %(message)s'

523

.format(self.name)))

391

524

return ret

392

525

393

526

394

def timedelta_to_milliseconds(td):

395

"Convert a datetime.timedelta() to milliseconds"

396

return ((td.days * 24 * 60 * 60 * 1000)

397

+ (td.seconds * 1000)

398

+ (td.microseconds // 1000))

399

400

401

class Client(object):

527

# Pretend that we have a GnuTLS module

528

class gnutls:

529

"""This isn't so much a class as it is a module-like namespace."""

530

531

library = ctypes.util.find_library("gnutls")

532

if library is None:

533

library = ctypes.util.find_library("gnutls-deb0")

534

_library = ctypes.cdll.LoadLibrary(library)

535

del library

536

537

# Unless otherwise indicated, the constants and types below are

538

# all from the gnutls/gnutls.h C header file.

539

540

# Constants

541

E_SUCCESS = 0

542

E_INTERRUPTED = -52

543

E_AGAIN = -28

544

CRT_OPENPGP = 2

545

CRT_RAWPK = 3

546

CLIENT = 2

547

SHUT_RDWR = 0

548

CRD_CERTIFICATE = 1

549

E_NO_CERTIFICATE_FOUND = -49

550

X509_FMT_DER = 0

551

NO_TICKETS = 1<<10

552

ENABLE_RAWPK = 1<<18

553

CTYPE_PEERS = 3

554

KEYID_USE_SHA256 = 1 # gnutls/x509.h

555

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

556

557

# Types

558

class session_int(ctypes.Structure):

559

_fields_ = []

560

session_t = ctypes.POINTER(session_int)

561

562

class certificate_credentials_st(ctypes.Structure):

563

_fields_ = []

564

certificate_credentials_t = ctypes.POINTER(

565

certificate_credentials_st)

566

certificate_type_t = ctypes.c_int

567

568

class datum_t(ctypes.Structure):

569

_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),

570

('size', ctypes.c_uint)]

571

572

class openpgp_crt_int(ctypes.Structure):

573

_fields_ = []

574

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

575

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

576

log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)

577

credentials_type_t = ctypes.c_int

578

transport_ptr_t = ctypes.c_void_p

579

close_request_t = ctypes.c_int

580

581

# Exceptions

582

class Error(Exception):

583

def __init__(self, message=None, code=None, args=()):

584

# Default usage is by a message string, but if a return

585

# code is passed, convert it to a string with

586

# gnutls.strerror()

587

self.code = code

588

if message is None and code is not None:

589

message = gnutls.strerror(code)

590

return super(gnutls.Error, self).__init__(

591

message, *args)

592

593

class CertificateSecurityError(Error):

594

pass

595

596

# Classes

597

class Credentials:

598

def __init__(self):

599

self._c_object = gnutls.certificate_credentials_t()

600

gnutls.certificate_allocate_credentials(

601

ctypes.byref(self._c_object))

602

self.type = gnutls.CRD_CERTIFICATE

603

604

def __del__(self):

605

gnutls.certificate_free_credentials(self._c_object)

606

607

class ClientSession:

608

def __init__(self, socket, credentials=None):

609

self._c_object = gnutls.session_t()

610

gnutls_flags = gnutls.CLIENT

611

if gnutls.check_version(b"3.5.6"):

612

gnutls_flags |= gnutls.NO_TICKETS

613

if gnutls.has_rawpk:

614

gnutls_flags |= gnutls.ENABLE_RAWPK

615

gnutls.init(ctypes.byref(self._c_object), gnutls_flags)

616

del gnutls_flags

617

gnutls.set_default_priority(self._c_object)

618

gnutls.transport_set_ptr(self._c_object, socket.fileno())

619

gnutls.handshake_set_private_extensions(self._c_object,

620

True)

621

self.socket = socket

622

if credentials is None:

623

credentials = gnutls.Credentials()

624

gnutls.credentials_set(self._c_object, credentials.type,

625

ctypes.cast(credentials._c_object,

626

ctypes.c_void_p))

627

self.credentials = credentials

628

629

def __del__(self):

630

gnutls.deinit(self._c_object)

631

632

def handshake(self):

633

return gnutls.handshake(self._c_object)

634

635

def send(self, data):

636

data = bytes(data)

637

data_len = len(data)

638

while data_len > 0:

639

data_len -= gnutls.record_send(self._c_object,

640

data[-data_len:],

641

data_len)

642

643

def bye(self):

644

return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)

645

646

# Error handling functions

647

def _error_code(result):

648

"""A function to raise exceptions on errors, suitable

649

for the 'restype' attribute on ctypes functions"""

650

if result >= 0:

651

return result

652

if result == gnutls.E_NO_CERTIFICATE_FOUND:

653

raise gnutls.CertificateSecurityError(code=result)

654

raise gnutls.Error(code=result)

655

656

def _retry_on_error(result, func, arguments):

657

"""A function to retry on some errors, suitable

658

for the 'errcheck' attribute on ctypes functions"""

659

while result < 0:

660

if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):

661

return _error_code(result)

662

result = func(*arguments)

663

return result

664

665

# Unless otherwise indicated, the function declarations below are

666

# all from the gnutls/gnutls.h C header file.

667

668

# Functions

669

priority_set_direct = _library.gnutls_priority_set_direct

670

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

671

ctypes.POINTER(ctypes.c_char_p)]

672

priority_set_direct.restype = _error_code

673

674

init = _library.gnutls_init

675

init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]

676

init.restype = _error_code

677

678

set_default_priority = _library.gnutls_set_default_priority

679

set_default_priority.argtypes = [session_t]

680

set_default_priority.restype = _error_code

681

682

record_send = _library.gnutls_record_send

683

record_send.argtypes = [session_t, ctypes.c_void_p,

684

ctypes.c_size_t]

685

record_send.restype = ctypes.c_ssize_t

686

record_send.errcheck = _retry_on_error

687

688

certificate_allocate_credentials = (

689

_library.gnutls_certificate_allocate_credentials)

690

certificate_allocate_credentials.argtypes = [

691

ctypes.POINTER(certificate_credentials_t)]

692

certificate_allocate_credentials.restype = _error_code

693

694

certificate_free_credentials = (

695

_library.gnutls_certificate_free_credentials)

696

certificate_free_credentials.argtypes = [

697

certificate_credentials_t]

698

certificate_free_credentials.restype = None

699

700

handshake_set_private_extensions = (

701

_library.gnutls_handshake_set_private_extensions)

702

handshake_set_private_extensions.argtypes = [session_t,

703

ctypes.c_int]

704

handshake_set_private_extensions.restype = None

705

706

credentials_set = _library.gnutls_credentials_set

707

credentials_set.argtypes = [session_t, credentials_type_t,

708

ctypes.c_void_p]

709

credentials_set.restype = _error_code

710

711

strerror = _library.gnutls_strerror

712

strerror.argtypes = [ctypes.c_int]

713

strerror.restype = ctypes.c_char_p

714

715

certificate_type_get = _library.gnutls_certificate_type_get

716

certificate_type_get.argtypes = [session_t]

717

certificate_type_get.restype = _error_code

718

719

certificate_get_peers = _library.gnutls_certificate_get_peers

720

certificate_get_peers.argtypes = [session_t,

721

ctypes.POINTER(ctypes.c_uint)]

722

certificate_get_peers.restype = ctypes.POINTER(datum_t)

723

724

global_set_log_level = _library.gnutls_global_set_log_level

725

global_set_log_level.argtypes = [ctypes.c_int]

726

global_set_log_level.restype = None

727

728

global_set_log_function = _library.gnutls_global_set_log_function

729

global_set_log_function.argtypes = [log_func]

730

global_set_log_function.restype = None

731

732

deinit = _library.gnutls_deinit

733

deinit.argtypes = [session_t]

734

deinit.restype = None

735

736

handshake = _library.gnutls_handshake

737

handshake.argtypes = [session_t]

738

handshake.restype = _error_code

739

handshake.errcheck = _retry_on_error

740

741

transport_set_ptr = _library.gnutls_transport_set_ptr

742

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

743

transport_set_ptr.restype = None

744

745

bye = _library.gnutls_bye

746

bye.argtypes = [session_t, close_request_t]

747

bye.restype = _error_code

748

bye.errcheck = _retry_on_error

749

750

check_version = _library.gnutls_check_version

751

check_version.argtypes = [ctypes.c_char_p]

752

check_version.restype = ctypes.c_char_p

753

754

_need_version = b"3.3.0"

755

if check_version(_need_version) is None:

756

raise self.Error("Needs GnuTLS {} or later"

757

.format(_need_version))

758

759

_tls_rawpk_version = b"3.6.6"

760

has_rawpk = bool(check_version(_tls_rawpk_version))

761

762

if has_rawpk:

763

# Types

764

class pubkey_st(ctypes.Structure):

765

_fields = []

766

pubkey_t = ctypes.POINTER(pubkey_st)

767

768

x509_crt_fmt_t = ctypes.c_int

769

770

# All the function declarations below are from gnutls/abstract.h

771

pubkey_init = _library.gnutls_pubkey_init

772

pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]

773

pubkey_init.restype = _error_code

774

775

pubkey_import = _library.gnutls_pubkey_import

776

pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),

777

x509_crt_fmt_t]

778

pubkey_import.restype = _error_code

779

780

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

781

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

782

ctypes.POINTER(ctypes.c_ubyte),

783

ctypes.POINTER(ctypes.c_size_t)]

784

pubkey_get_key_id.restype = _error_code

785

786

pubkey_deinit = _library.gnutls_pubkey_deinit

787

pubkey_deinit.argtypes = [pubkey_t]

788

pubkey_deinit.restype = None

789

else:

790

# All the function declarations below are from gnutls/openpgp.h

791

792

openpgp_crt_init = _library.gnutls_openpgp_crt_init

793

openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]

794

openpgp_crt_init.restype = _error_code

795

796

openpgp_crt_import = _library.gnutls_openpgp_crt_import

797

openpgp_crt_import.argtypes = [openpgp_crt_t,

798

ctypes.POINTER(datum_t),

799

openpgp_crt_fmt_t]

800

openpgp_crt_import.restype = _error_code

801

802

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

803

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

804

ctypes.POINTER(ctypes.c_uint)]

805

openpgp_crt_verify_self.restype = _error_code

806

807

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

808

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

809

openpgp_crt_deinit.restype = None

810

811

openpgp_crt_get_fingerprint = (

812

_library.gnutls_openpgp_crt_get_fingerprint)

813

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

814

ctypes.c_void_p,

815

ctypes.POINTER(

816

ctypes.c_size_t)]

817

openpgp_crt_get_fingerprint.restype = _error_code

818

819

if check_version(b"3.6.4"):

820

certificate_type_get2 = _library.gnutls_certificate_type_get2

821

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

822

certificate_type_get2.restype = _error_code

823

824

# Remove non-public functions

825

del _error_code, _retry_on_error

826

827

828

def call_pipe(connection, # : multiprocessing.Connection

829

func, *args, **kwargs):

830

"""This function is meant to be called by multiprocessing.Process

831

832

This function runs func(*args, **kwargs), and writes the resulting

833

return value on the provided multiprocessing.Connection.

834

"""

835

connection.send(func(*args, **kwargs))

836

connection.close()

837

838

839

class Client:

402

840

"""A representation of a client host served by this server.

403

841

404

842

Attributes:

405

843

approved: bool(); 'None' if not yet approved/disapproved

406

844

approval_delay: datetime.timedelta(); Time to wait for approval

407

845

approval_duration: datetime.timedelta(); Duration of one approval

408

checker: subprocess.Popen(); a running checker process used

409

to see if the client lives.

410

'None' if no process is running.

411

checker_callback_tag: a gobject event source tag, or None

846

checker: multiprocessing.Process(); a running checker process used

847

to see if the client lives. 'None' if no process is

848

running.

849

checker_callback_tag: a GLib event source tag, or None

412

850

checker_command: string; External command which is run to check

413

851

if client lives. %() expansions are done at

414

852

runtime with vars(self) as dict, so that for

415

853

instance %(name)s can be used in the command.

416

checker_initiator_tag: a gobject event source tag, or None

854

checker_initiator_tag: a GLib event source tag, or None

417

855

created: datetime.datetime(); (UTC) object creation

418

856

client_structure: Object describing what attributes a client has

419

857

and is used for storing the client at exit

420

858

current_checker_command: string; current running checker_command

421

disable_initiator_tag: a gobject event source tag, or None

859

disable_initiator_tag: a GLib event source tag, or None

422

860

enabled: bool()

423

861

fingerprint: string (40 or 32 hexadecimal digits); used to

424

uniquely identify the client

862

uniquely identify an OpenPGP client

863

key_id: string (64 hexadecimal digits); used to uniquely identify

864

a client using raw public keys

425

865

host: string; available for use by the checker command

426

866

interval: datetime.timedelta(); How often to start a new checker

427

867

last_approval_request: datetime.datetime(); (UTC) or None

429

869

last_checker_status: integer between 0 and 255 reflecting exit

430

870

status of last checker. -1 reflects crashed

431

871

checker, -2 means no checker completed yet.

872

last_checker_signal: The signal which killed the last checker, if

873

last_checker_status is -1

432

874

last_enabled: datetime.datetime(); (UTC) or None

433

875

name: string; from the config file, used in log messages and

434

876

D-Bus identifiers

439

881

runtime_expansions: Allowed attributes for runtime expansion.

440

882

expires: datetime.datetime(); time (UTC) when a client will be

441

883

disabled, or None

884

server_settings: The server_settings dict from main()

442

885

"""

443

886

444

887

runtime_expansions = ("approval_delay", "approval_duration",

445

"created", "enabled", "expires",

888

"created", "enabled", "expires", "key_id",

446

889

"fingerprint", "host", "interval",

447

890

"last_approval_request", "last_checked_ok",

448

891

"last_enabled", "name", "timeout")

449

client_defaults = { "timeout": "5m",

450

"extended_timeout": "15m",

451

"interval": "2m",

452

"checker": "fping -q -- %%(host)s",

453

"host": "",

454

"approval_delay": "0s",

455

"approval_duration": "1s",

456

"approved_by_default": "True",

457

"enabled": "True",

458

}

459

460

def timeout_milliseconds(self):

461

"Return the 'timeout' attribute in milliseconds"

462

return timedelta_to_milliseconds(self.timeout)

463

464

def extended_timeout_milliseconds(self):

465

"Return the 'extended_timeout' attribute in milliseconds"

466

return timedelta_to_milliseconds(self.extended_timeout)

467

468

def interval_milliseconds(self):

469

"Return the 'interval' attribute in milliseconds"

470

return timedelta_to_milliseconds(self.interval)

471

472

def approval_delay_milliseconds(self):

473

return timedelta_to_milliseconds(self.approval_delay)

474

892

client_defaults = {

893

"timeout": "PT5M",

894

"extended_timeout": "PT15M",

895

"interval": "PT2M",

896

"checker": "fping -q -- %%(host)s",

897

"host": "",

898

"approval_delay": "PT0S",

899

"approval_duration": "PT1S",

900

"approved_by_default": "True",

901

"enabled": "True",

902

}

903

475

904

@staticmethod

476

905

def config_parser(config):

477

906

"""Construct a new dict of client settings of this form:

484

913

for client_name in config.sections():

485

914

section = dict(config.items(client_name))

486

915

client = settings[client_name] = {}

487

916

488

917

client["host"] = section["host"]

489

918

# Reformat values from string types to Python types

490

919

client["approved_by_default"] = config.getboolean(

491

920

client_name, "approved_by_default")

492

921

client["enabled"] = config.getboolean(client_name,

493

922

"enabled")

494

923

924

# Uppercase and remove spaces from key_id and fingerprint

925

# for later comparison purposes with return value from the

926

# key_id() and fingerprint() functions

927

client["key_id"] = (section.get("key_id", "").upper()

928

.replace(" ", ""))

495

929

client["fingerprint"] = (section["fingerprint"].upper()

496

930

.replace(" ", ""))

497

931

if "secret" in section:

498

client["secret"] = section["secret"].decode("base64")

932

client["secret"] = codecs.decode(section["secret"]

933

.encode("utf-8"),

934

"base64")

499

935

elif "secfile" in section:

500

936

with open(os.path.expanduser(os.path.expandvars

501

937

(section["secfile"])),

502

938

"rb") as secfile:

503

939

client["secret"] = secfile.read()

504

940

else:

505

raise TypeError("No secret or secfile for section {0}"

941

raise TypeError("No secret or secfile for section {}"

506

942

.format(section))

507

943

client["timeout"] = string_to_delta(section["timeout"])

508

944

client["extended_timeout"] = string_to_delta(

516

952

client["last_approval_request"] = None

517

953

client["last_checked_ok"] = None

518

954

client["last_checker_status"] = -2

519

955

520

956

return settings

521

522

def __init__(self, settings, name = None):

957

958

def __init__(self, settings, name=None, server_settings=None):

523

959

self.name = name

960

if server_settings is None:

961

server_settings = {}

962

self.server_settings = server_settings

524

963

# adding all client settings

525

for setting, value in settings.iteritems():

964

for setting, value in settings.items():

526

965

setattr(self, setting, value)

527

966

528

967

if self.enabled:

529

968

if not hasattr(self, "last_enabled"):

530

969

self.last_enabled = datetime.datetime.utcnow()

534

973

else:

535

974

self.last_enabled = None

536

975

self.expires = None

537

976

538

977

logger.debug("Creating client %r", self.name)

539

# Uppercase and remove spaces from fingerprint for later

540

# comparison purposes with return value from the fingerprint()

541

# function

978

logger.debug(" Key ID: %s", self.key_id)

542

979

logger.debug(" Fingerprint: %s", self.fingerprint)

543

980

self.created = settings.get("created",

544

981

datetime.datetime.utcnow())

545

982

546

983

# attributes specific for this server instance

547

984

self.checker = None

548

985

self.checker_initiator_tag = None

551

988

self.current_checker_command = None

552

989

self.approved = None

553

990

self.approvals_pending = 0

554

self.changedstate = (multiprocessing_manager

555

.Condition(multiprocessing_manager

556

.Lock()))

557

self.client_structure = [attr for attr in

558

self.__dict__.iterkeys()

991

self.changedstate = multiprocessing_manager.Condition(

992

multiprocessing_manager.Lock())

993

self.client_structure = [attr

994

for attr in self.__dict__.keys()

559

995

if not attr.startswith("_")]

560

996

self.client_structure.append("client_structure")

561

562

for name, t in inspect.getmembers(type(self),

563

lambda obj:

564

isinstance(obj,

565

property)):

997

998

for name, t in inspect.getmembers(

999

type(self), lambda obj: isinstance(obj, property)):

566

1000

if not name.startswith("_"):

567

1001

self.client_structure.append(name)

568

1002

569

1003

# Send notice to process children that client state has changed

570

1004

def send_changedstate(self):

571

1005

with self.changedstate:

572

1006

self.changedstate.notify_all()

573

1007

574

1008

def enable(self):

575

1009

"""Start this client's checker and timeout hooks"""

576

1010

if getattr(self, "enabled", False):

581

1015

self.last_enabled = datetime.datetime.utcnow()

582

1016

self.init_checker()

583

1017

self.send_changedstate()

584

1018

585

1019

def disable(self, quiet=True):

586

1020

"""Disable this client."""

587

1021

if not getattr(self, "enabled", False):

589

1023

if not quiet:

590

1024

logger.info("Disabling client %s", self.name)

591

1025

if getattr(self, "disable_initiator_tag", None) is not None:

592

gobject.source_remove(self.disable_initiator_tag)

1026

GLib.source_remove(self.disable_initiator_tag)

593

1027

self.disable_initiator_tag = None

594

1028

self.expires = None

595

1029

if getattr(self, "checker_initiator_tag", None) is not None:

596

gobject.source_remove(self.checker_initiator_tag)

1030

GLib.source_remove(self.checker_initiator_tag)

597

1031

self.checker_initiator_tag = None

598

1032

self.stop_checker()

599

1033

self.enabled = False

600

1034

if not quiet:

601

1035

self.send_changedstate()

602

# Do not run this again if called by a gobject.timeout_add

1036

# Do not run this again if called by a GLib.timeout_add

603

1037

return False

604

1038

605

1039

def __del__(self):

606

1040

self.disable()

607

1041

608

1042

def init_checker(self):

609

1043

# Schedule a new checker to be started an 'interval' from now,

610

1044

# and every interval from then on.

611

1045

if self.checker_initiator_tag is not None:

612

gobject.source_remove(self.checker_initiator_tag)

613

self.checker_initiator_tag = (gobject.timeout_add

614

(self.interval_milliseconds(),

615

self.start_checker))

1046

GLib.source_remove(self.checker_initiator_tag)

1047

self.checker_initiator_tag = GLib.timeout_add(

1048

random.randrange(int(self.interval.total_seconds() * 1000

1049

+ 1)),

1050

self.start_checker)

616

1051

# Schedule a disable() when 'timeout' has passed

617

1052

if self.disable_initiator_tag is not None:

618

gobject.source_remove(self.disable_initiator_tag)

619

self.disable_initiator_tag = (gobject.timeout_add

620

(self.timeout_milliseconds(),

621

self.disable))

1053

GLib.source_remove(self.disable_initiator_tag)

1054

self.disable_initiator_tag = GLib.timeout_add(

1055

int(self.timeout.total_seconds() * 1000), self.disable)

622

1056

# Also start a new checker *right now*.

623

1057

self.start_checker()

624

625

def checker_callback(self, pid, condition, command):

1058

1059

def checker_callback(self, source, condition, connection,

1060

command):

626

1061

"""The checker has completed, so take appropriate actions."""

1062

# Read return code from connection (see call_pipe)

1063

returncode = connection.recv()

1064

connection.close()

1065

if self.checker is not None:

1066

self.checker.join()

627

1067

self.checker_callback_tag = None

628

1068

self.checker = None

629

if os.WIFEXITED(condition):

630

self.last_checker_status = os.WEXITSTATUS(condition)

1069

1070

if returncode >= 0:

1071

self.last_checker_status = returncode

1072

self.last_checker_signal = None

631

1073

if self.last_checker_status == 0:

632

1074

logger.info("Checker for %(name)s succeeded",

633

1075

vars(self))

634

1076

self.checked_ok()

635

1077

else:

636

logger.info("Checker for %(name)s failed",

637

vars(self))

1078

logger.info("Checker for %(name)s failed", vars(self))

638

1079

else:

639

1080

self.last_checker_status = -1

1081

self.last_checker_signal = -returncode

640

1082

logger.warning("Checker for %(name)s crashed?",

641

1083

vars(self))

642

1084

return False

1085

643

1086

def checked_ok(self):

644

1087

"""Assert that the client has been seen, alive and well."""

645

1088

self.last_checked_ok = datetime.datetime.utcnow()

646

1089

self.last_checker_status = 0

1090

self.last_checker_signal = None

647

1091

self.bump_timeout()

648

1092

649

1093

def bump_timeout(self, timeout=None):

650

1094

"""Bump up the timeout for this client."""

651

1095

if timeout is None:

652

1096

timeout = self.timeout

653

1097

if self.disable_initiator_tag is not None:

654

gobject.source_remove(self.disable_initiator_tag)

1098

GLib.source_remove(self.disable_initiator_tag)

655

1099

self.disable_initiator_tag = None

656

1100

if getattr(self, "enabled", False):

657

self.disable_initiator_tag = (gobject.timeout_add

658

(timedelta_to_milliseconds

659

(timeout), self.disable))

1101

self.disable_initiator_tag = GLib.timeout_add(

1102

int(timeout.total_seconds() * 1000), self.disable)

660

1103

self.expires = datetime.datetime.utcnow() + timeout

661

1104

662

1105

def need_approval(self):

663

1106

self.last_approval_request = datetime.datetime.utcnow()

664

1107

665

1108

def start_checker(self):

666

1109

"""Start a new checker subprocess if one is not running.

667

1110

668

1111

If a checker already exists, leave it running and do

669

1112

nothing."""

670

1113

# The reason for not killing a running checker is that if we

675

1118

# checkers alone, the checker would have to take more time

676

1119

# than 'timeout' for the client to be disabled, which is as it

677

1120

# should be.

678

679

# If a checker exists, make sure it is not a zombie

680

try:

681

pid, status = os.waitpid(self.checker.pid, os.WNOHANG)

682

except (AttributeError, OSError) as error:

683

if (isinstance(error, OSError)

684

and error.errno != errno.ECHILD):

685

raise error

686

else:

687

if pid:

688

logger.warning("Checker was a zombie")

689

gobject.source_remove(self.checker_callback_tag)

690

self.checker_callback(pid, status,

691

self.current_checker_command)

1121

1122

if self.checker is not None and not self.checker.is_alive():

1123

logger.warning("Checker was not alive; joining")

1124

self.checker.join()

1125

self.checker = None

692

1126

# Start a new checker if needed

693

1127

if self.checker is None:

694

1128

# Escape attributes for the shell

695

escaped_attrs = dict(

696

(attr, re.escape(unicode(getattr(self, attr))))

697

for attr in

698

self.runtime_expansions)

1129

escaped_attrs = {

1130

attr: re.escape(str(getattr(self, attr)))

1131

for attr in self.runtime_expansions}

699

1132

try:

700

1133

command = self.checker_command % escaped_attrs

701

1134

except TypeError as error:

702

1135

logger.error('Could not format string "%s"',

703

self.checker_command, exc_info=error)

704

return True # Try again later

1136

self.checker_command,

1137

exc_info=error)

1138

return True # Try again later

705

1139

self.current_checker_command = command

706

try:

707

logger.info("Starting checker %r for %s",

708

command, self.name)

709

# We don't need to redirect stdout and stderr, since

710

# in normal mode, that is already done by daemon(),

711

# and in debug mode we don't want to. (Stdin is

712

# always replaced by /dev/null.)

713

self.checker = subprocess.Popen(command,

714

close_fds=True,

715

shell=True, cwd="/")

716

except OSError as error:

717

logger.error("Failed to start subprocess",

718

exc_info=error)

719

self.checker_callback_tag = (gobject.child_watch_add

720

(self.checker.pid,

721

self.checker_callback,

722

data=command))

723

# The checker may have completed before the gobject

724

# watch was added. Check for this.

725

pid, status = os.waitpid(self.checker.pid, os.WNOHANG)

726

if pid:

727

gobject.source_remove(self.checker_callback_tag)

728

self.checker_callback(pid, status, command)

729

# Re-run this periodically if run by gobject.timeout_add

1140

logger.info("Starting checker %r for %s", command,

1141

self.name)

1142

# We don't need to redirect stdout and stderr, since

1143

# in normal mode, that is already done by daemon(),

1144

# and in debug mode we don't want to. (Stdin is

1145

# always replaced by /dev/null.)

1146

# The exception is when not debugging but nevertheless

1147

# running in the foreground; use the previously

1148

# created wnull.

1149

popen_args = {"close_fds": True,

1150

"shell": True,

1151

"cwd": "/"}

1152

if (not self.server_settings["debug"]

1153

and self.server_settings["foreground"]):

1154

popen_args.update({"stdout": wnull,

1155

"stderr": wnull})

1156

pipe = multiprocessing.Pipe(duplex=False)

1157

self.checker = multiprocessing.Process(

1158

target=call_pipe,

1159

args=(pipe[1], subprocess.call, command),

1160

kwargs=popen_args)

1161

self.checker.start()

1162

self.checker_callback_tag = GLib.io_add_watch(

1163

GLib.IOChannel.unix_new(pipe[0].fileno()),

1164

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

1165

self.checker_callback, pipe[0], command)

1166

# Re-run this periodically if run by GLib.timeout_add

730

1167

return True

731

1168

732

1169

def stop_checker(self):

733

1170

"""Force the checker process, if any, to stop."""

734

1171

if self.checker_callback_tag:

735

gobject.source_remove(self.checker_callback_tag)

1172

GLib.source_remove(self.checker_callback_tag)

736

1173

self.checker_callback_tag = None

737

1174

if getattr(self, "checker", None) is None:

738

1175

return

739

1176

logger.debug("Stopping checker for %(name)s", vars(self))

740

try:

741

self.checker.terminate()

742

#time.sleep(0.5)

743

#if self.checker.poll() is None:

744

# self.checker.kill()

745

except OSError as error:

746

if error.errno != errno.ESRCH: # No such process

747

raise

1177

self.checker.terminate()

748

1178

self.checker = None

749

1179

750

1180

751

def dbus_service_property(dbus_interface, signature="v",

752

access="readwrite", byte_arrays=False):

1181

def dbus_service_property(dbus_interface,

1182

signature="v",

1183

access="readwrite",

1184

byte_arrays=False):

753

1185

"""Decorators for marking methods of a DBusObjectWithProperties to

754

1186

become properties on the D-Bus.

755

1187

756

1188

The decorated method will be called with no arguments by "Get"

757

1189

and with one argument by "Set".

758

1190

759

1191

The parameters, where they are supported, are the same as

760

1192

dbus.service.method, except there is only "signature", since the

761

1193

type from Get() and the type sent to Set() is the same.

764

1196

# "Set" method, so we fail early here:

765

1197

if byte_arrays and signature != "ay":

766

1198

raise ValueError("Byte arrays not supported for non-'ay'"

767

" signature {0!r}".format(signature))

1199

" signature {!r}".format(signature))

1200

768

1201

def decorator(func):

769

1202

func._dbus_is_property = True

770

1203

func._dbus_interface = dbus_interface

773

1206

func._dbus_name = func.__name__

774

1207

if func._dbus_name.endswith("_dbus_property"):

775

1208

func._dbus_name = func._dbus_name[:-14]

776

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1209

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

777

1210

return func

1211

778

1212

return decorator

779

1213

780

1214

781

1215

def dbus_interface_annotations(dbus_interface):

782

1216

"""Decorator for marking functions returning interface annotations

783

1217

784

1218

Usage:

785

1219

786

1220

@dbus_interface_annotations("org.example.Interface")

787

1221

def _foo(self): # Function name does not matter

788

1222

return {"org.freedesktop.DBus.Deprecated": "true",

789

1223

"org.freedesktop.DBus.Property.EmitsChangedSignal":

790

1224

"false"}

791

1225

"""

1226

792

1227

def decorator(func):

793

1228

func._dbus_is_interface = True

794

1229

func._dbus_interface = dbus_interface

795

1230

func._dbus_name = dbus_interface

796

1231

return func

1232

797

1233

return decorator

798

1234

799

1235

800

1236

def dbus_annotations(annotations):

801

1237

"""Decorator to annotate D-Bus methods, signals or properties

802

1238

Usage:

803

1239

1240

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",

1241

"org.freedesktop.DBus.Property."

1242

"EmitsChangedSignal": "false"})

804

1243

@dbus_service_property("org.example.Interface", signature="b",

805

1244

access="r")

806

@dbus_annotations({{"org.freedesktop.DBus.Deprecated": "true",

807

"org.freedesktop.DBus.Property."

808

"EmitsChangedSignal": "false"})

809

1245

def Property_dbus_property(self):

810

1246

return dbus.Boolean(False)

1247

1248

See also the DBusObjectWithAnnotations class.

811

1249

"""

1250

812

1251

def decorator(func):

813

1252

func._dbus_annotations = annotations

814

1253

return func

1254

815

1255

return decorator

816

1256

817

1257

818

1258

class DBusPropertyException(dbus.exceptions.DBusException):

819

1259

"""A base class for D-Bus property-related exceptions

820

1260

"""

821

def __unicode__(self):

822

return unicode(str(self))

1261

pass

823

1262

824

1263

825

1264

class DBusPropertyAccessException(DBusPropertyException):

834

1273

pass

835

1274

836

1275

837

class DBusObjectWithProperties(dbus.service.Object):

838

"""A D-Bus object with properties.

839

840

Classes inheriting from this can use the dbus_service_property

841

decorator to expose methods as D-Bus properties. It exposes the

842

standard Get(), Set(), and GetAll() methods on the D-Bus.

1276

class DBusObjectWithAnnotations(dbus.service.Object):

1277

"""A D-Bus object with annotations.

1278

1279

Classes inheriting from this can use the dbus_annotations

1280

decorator to add annotations to methods or signals.

843

1281

"""

844

1282

845

1283

@staticmethod

846

1284

def _is_dbus_thing(thing):

847

1285

"""Returns a function testing if an attribute is a D-Bus thing

848

1286

849

1287

If called like _is_dbus_thing("method") it returns a function

850

1288

suitable for use as predicate to inspect.getmembers().

851

1289

"""

852

return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),

1290

return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),

853

1291

False)

854

1292

855

1293

def _get_all_dbus_things(self, thing):

856

1294

"""Returns a generator of (name, attribute) pairs

857

1295

"""

858

return ((getattr(athing.__get__(self), "_dbus_name",

859

name),

1296

return ((getattr(athing.__get__(self), "_dbus_name", name),

860

1297

athing.__get__(self))

861

1298

for cls in self.__class__.__mro__

862

1299

for name, athing in

863

inspect.getmembers(cls,

864

self._is_dbus_thing(thing)))

865

1300

inspect.getmembers(cls, self._is_dbus_thing(thing)))

1301

1302

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1303

out_signature="s",

1304

path_keyword='object_path',

1305

connection_keyword='connection')

1306

def Introspect(self, object_path, connection):

1307

"""Overloading of standard D-Bus method.

1308

1309

Inserts annotation tags on methods and signals.

1310

"""

1311

xmlstring = dbus.service.Object.Introspect(self, object_path,

1312

connection)

1313

try:

1314

document = xml.dom.minidom.parseString(xmlstring)

1315

1316

for if_tag in document.getElementsByTagName("interface"):

1317

# Add annotation tags

1318

for typ in ("method", "signal"):

1319

for tag in if_tag.getElementsByTagName(typ):

1320

annots = dict()

1321

for name, prop in (self.

1322

_get_all_dbus_things(typ)):

1323

if (name == tag.getAttribute("name")

1324

and prop._dbus_interface

1325

== if_tag.getAttribute("name")):

1326

annots.update(getattr(

1327

prop, "_dbus_annotations", {}))

1328

for name, value in annots.items():

1329

ann_tag = document.createElement(

1330

"annotation")

1331

ann_tag.setAttribute("name", name)

1332

ann_tag.setAttribute("value", value)

1333

tag.appendChild(ann_tag)

1334

# Add interface annotation tags

1335

for annotation, value in dict(

1336

itertools.chain.from_iterable(

1337

annotations().items()

1338

for name, annotations

1339

in self._get_all_dbus_things("interface")

1340

if name == if_tag.getAttribute("name")

1341

)).items():

1342

ann_tag = document.createElement("annotation")

1343

ann_tag.setAttribute("name", annotation)

1344

ann_tag.setAttribute("value", value)

1345

if_tag.appendChild(ann_tag)

1346

# Fix argument name for the Introspect method itself

1347

if (if_tag.getAttribute("name")

1348

== dbus.INTROSPECTABLE_IFACE):

1349

for cn in if_tag.getElementsByTagName("method"):

1350

if cn.getAttribute("name") == "Introspect":

1351

for arg in cn.getElementsByTagName("arg"):

1352

if (arg.getAttribute("direction")

1353

== "out"):

1354

arg.setAttribute("name",

1355

"xml_data")

1356

xmlstring = document.toxml("utf-8")

1357

document.unlink()

1358

except (AttributeError, xml.dom.DOMException,

1359

xml.parsers.expat.ExpatError) as error:

1360

logger.error("Failed to override Introspection method",

1361

exc_info=error)

1362

return xmlstring

1363

1364

1365

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1366

"""A D-Bus object with properties.

1367

1368

Classes inheriting from this can use the dbus_service_property

1369

decorator to expose methods as D-Bus properties. It exposes the

1370

standard Get(), Set(), and GetAll() methods on the D-Bus.

1371

"""

1372

866

1373

def _get_dbus_property(self, interface_name, property_name):

867

1374

"""Returns a bound method if one exists which is a D-Bus

868

1375

property with the specified name and interface.

869

1376

"""

870

for cls in self.__class__.__mro__:

871

for name, value in (inspect.getmembers

872

(cls,

873

self._is_dbus_thing("property"))):

1377

for cls in self.__class__.__mro__:

1378

for name, value in inspect.getmembers(

1379

cls, self._is_dbus_thing("property")):

874

1380

if (value._dbus_name == property_name

875

1381

and value._dbus_interface == interface_name):

876

1382

return value.__get__(self)

877

1383

878

1384

# No such property

879

raise DBusPropertyNotFound(self.dbus_object_path + ":"

880

+ interface_name + "."

881

+ property_name)

882

883

@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ss",

1385

raise DBusPropertyNotFound("{}:{}.{}".format(

1386

self.dbus_object_path, interface_name, property_name))

1387

1388

@classmethod

1389

def _get_all_interface_names(cls):

1390

"""Get a sequence of all interfaces supported by an object"""

1391

return (name for name in set(getattr(getattr(x, attr),

1392

"_dbus_interface", None)

1393

for x in (inspect.getmro(cls))

1394

for attr in dir(x))

1395

if name is not None)

1396

1397

@dbus.service.method(dbus.PROPERTIES_IFACE,

1398

in_signature="ss",

884

1399

out_signature="v")

885

1400

def Get(self, interface_name, property_name):

886

1401

"""Standard D-Bus property Get() method, see D-Bus standard.

892

1407

if not hasattr(value, "variant_level"):

893

1408

return value

894

1409

return type(value)(value, variant_level=value.variant_level+1)

895

1410

896

1411

@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")

897

1412

def Set(self, interface_name, property_name, value):

898

1413

"""Standard D-Bus property Set() method, see D-Bus standard.

904

1419

# The byte_arrays option is not supported yet on

905

1420

# signatures other than "ay".

906

1421

if prop._dbus_signature != "ay":

907

raise ValueError

908

value = dbus.ByteArray(b''.join(chr(byte)

909

for byte in value))

1422

raise ValueError("Byte arrays not supported for non-"

1423

"'ay' signature {!r}"

1424

.format(prop._dbus_signature))

1425

value = dbus.ByteArray(bytes(value))

910

1426

prop(value)

911

912

@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="s",

1427

1428

@dbus.service.method(dbus.PROPERTIES_IFACE,

1429

in_signature="s",

913

1430

out_signature="a{sv}")

914

1431

def GetAll(self, interface_name):

915

1432

"""Standard D-Bus property GetAll() method, see D-Bus

916

1433

standard.

917

1434

918

1435

Note: Will not include properties with access="write".

919

1436

"""

920

1437

properties = {}

930

1447

if not hasattr(value, "variant_level"):

931

1448

properties[name] = value

932

1449

continue

933

properties[name] = type(value)(value, variant_level=

934

value.variant_level+1)

1450

properties[name] = type(value)(

1451

value, variant_level=value.variant_level + 1)

935

1452

return dbus.Dictionary(properties, signature="sv")

936

1453

1454

@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")

1455

def PropertiesChanged(self, interface_name, changed_properties,

1456

invalidated_properties):

1457

"""Standard D-Bus PropertiesChanged() signal, see D-Bus

1458

standard.

1459

"""

1460

pass

1461

937

1462

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

938

1463

out_signature="s",

939

1464

path_keyword='object_path',

940

1465

connection_keyword='connection')

941

1466

def Introspect(self, object_path, connection):

942

1467

"""Overloading of standard D-Bus method.

943

1468

944

1469

Inserts property tags and interface annotation tags.

945

1470

"""

946

xmlstring = dbus.service.Object.Introspect(self, object_path,

947

connection)

1471

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1472

object_path,

1473

connection)

948

1474

try:

949

1475

document = xml.dom.minidom.parseString(xmlstring)

1476

950

1477

def make_tag(document, name, prop):

951

1478

e = document.createElement("property")

952

1479

e.setAttribute("name", name)

953

1480

e.setAttribute("type", prop._dbus_signature)

954

1481

e.setAttribute("access", prop._dbus_access)

955

1482

return e

1483

956

1484

for if_tag in document.getElementsByTagName("interface"):

957

1485

# Add property tags

958

1486

for tag in (make_tag(document, name, prop)

961

1489

if prop._dbus_interface

962

1490

== if_tag.getAttribute("name")):

963

1491

if_tag.appendChild(tag)

964

# Add annotation tags

965

for typ in ("method", "signal", "property"):

966

for tag in if_tag.getElementsByTagName(typ):

967

annots = dict()

968

for name, prop in (self.

969

_get_all_dbus_things(typ)):

970

if (name == tag.getAttribute("name")

971

and prop._dbus_interface

972

== if_tag.getAttribute("name")):

973

annots.update(getattr

974

(prop,

975

"_dbus_annotations",

976

{}))

977

for name, value in annots.iteritems():

978

ann_tag = document.createElement(

979

"annotation")

980

ann_tag.setAttribute("name", name)

981

ann_tag.setAttribute("value", value)

982

tag.appendChild(ann_tag)

983

# Add interface annotation tags

984

for annotation, value in dict(

985

itertools.chain.from_iterable(

986

annotations().iteritems()

987

for name, annotations in

988

self._get_all_dbus_things("interface")

989

if name == if_tag.getAttribute("name")

990

)).iteritems():

991

ann_tag = document.createElement("annotation")

992

ann_tag.setAttribute("name", annotation)

993

ann_tag.setAttribute("value", value)

994

if_tag.appendChild(ann_tag)

1492

# Add annotation tags for properties

1493

for tag in if_tag.getElementsByTagName("property"):

1494

annots = dict()

1495

for name, prop in self._get_all_dbus_things(

1496

"property"):

1497

if (name == tag.getAttribute("name")

1498

and prop._dbus_interface

1499

== if_tag.getAttribute("name")):

1500

annots.update(getattr(

1501

prop, "_dbus_annotations", {}))

1502

for name, value in annots.items():

1503

ann_tag = document.createElement(

1504

"annotation")

1505

ann_tag.setAttribute("name", name)

1506

ann_tag.setAttribute("value", value)

1507

tag.appendChild(ann_tag)

995

1508

# Add the names to the return values for the

996

1509

# "org.freedesktop.DBus.Properties" methods

997

1510

if (if_tag.getAttribute("name")

1016

1529

return xmlstring

1017

1530

1018

1531

1532

try:

1533

dbus.OBJECT_MANAGER_IFACE

1534

except AttributeError:

1535

dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"

1536

1537

1538

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1539

"""A D-Bus object with an ObjectManager.

1540

1541

Classes inheriting from this exposes the standard

1542

GetManagedObjects call and the InterfacesAdded and

1543

InterfacesRemoved signals on the standard

1544

"org.freedesktop.DBus.ObjectManager" interface.

1545

1546

Note: No signals are sent automatically; they must be sent

1547

manually.

1548

"""

1549

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1550

out_signature="a{oa{sa{sv}}}")

1551

def GetManagedObjects(self):

1552

"""This function must be overridden"""

1553

raise NotImplementedError()

1554

1555

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1556

signature="oa{sa{sv}}")

1557

def InterfacesAdded(self, object_path, interfaces_and_properties):

1558

pass

1559

1560

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature="oas")

1561

def InterfacesRemoved(self, object_path, interfaces):

1562

pass

1563

1564

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1565

out_signature="s",

1566

path_keyword='object_path',

1567

connection_keyword='connection')

1568

def Introspect(self, object_path, connection):

1569

"""Overloading of standard D-Bus method.

1570

1571

Override return argument name of GetManagedObjects to be

1572

"objpath_interfaces_and_properties"

1573

"""

1574

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1575

object_path,

1576

connection)

1577

try:

1578

document = xml.dom.minidom.parseString(xmlstring)

1579

1580

for if_tag in document.getElementsByTagName("interface"):

1581

# Fix argument name for the GetManagedObjects method

1582

if (if_tag.getAttribute("name")

1583

== dbus.OBJECT_MANAGER_IFACE):

1584

for cn in if_tag.getElementsByTagName("method"):

1585

if (cn.getAttribute("name")

1586

== "GetManagedObjects"):

1587

for arg in cn.getElementsByTagName("arg"):

1588

if (arg.getAttribute("direction")

1589

== "out"):

1590

arg.setAttribute(

1591

"name",

1592

"objpath_interfaces"

1593

"_and_properties")

1594

xmlstring = document.toxml("utf-8")

1595

document.unlink()

1596

except (AttributeError, xml.dom.DOMException,

1597

xml.parsers.expat.ExpatError) as error:

1598

logger.error("Failed to override Introspection method",

1599

exc_info=error)

1600

return xmlstring

1601

1602

1019

1603

def datetime_to_dbus(dt, variant_level=0):

1020

1604

"""Convert a UTC datetime.datetime() to a D-Bus type."""

1021

1605

if dt is None:

1022

return dbus.String("", variant_level = variant_level)

1023

return dbus.String(dt.isoformat(),

1024

variant_level=variant_level)

1606

return dbus.String("", variant_level=variant_level)

1607

return dbus.String(dt.isoformat(), variant_level=variant_level)

1025

1608

1026

1609

1027

1610

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1029

1612

dbus.service.Object, it will add alternate D-Bus attributes with

1030

1613

interface names according to the "alt_interface_names" mapping.

1031

1614

Usage:

1032

1615

1033

1616

@alternate_dbus_interfaces({"org.example.Interface":

1034

1617

"net.example.AlternateInterface"})

1035

1618

class SampleDBusObject(dbus.service.Object):

1036

1619

@dbus.service.method("org.example.Interface")

1037

1620

def SampleDBusMethod():

1038

1621

pass

1039

1622

1040

1623

The above "SampleDBusMethod" on "SampleDBusObject" will be

1041

1624

reachable via two interfaces: "org.example.Interface" and

1042

1625

"net.example.AlternateInterface", the latter of which will have

1043

1626

its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to

1044

1627

"true", unless "deprecate" is passed with a False value.

1045

1628

1046

1629

This works for methods and signals, and also for D-Bus properties

1047

1630

(from DBusObjectWithProperties) and interfaces (from the

1048

1631

dbus_interface_annotations decorator).

1049

1632

"""

1633

1050

1634

def wrapper(cls):

1051

1635

for orig_interface_name, alt_interface_name in (

1052

alt_interface_names.iteritems()):

1636

alt_interface_names.items()):

1053

1637

attr = {}

1054

1638

interface_names = set()

1055

1639

# Go though all attributes of the class

1057

1641

# Ignore non-D-Bus attributes, and D-Bus attributes

1058

1642

# with the wrong interface name

1059

1643

if (not hasattr(attribute, "_dbus_interface")

1060

or not attribute._dbus_interface

1061

.startswith(orig_interface_name)):

1644

or not attribute._dbus_interface.startswith(

1645

orig_interface_name)):

1062

1646

continue

1063

1647

# Create an alternate D-Bus interface name based on

1064

1648

# the current name

1065

alt_interface = (attribute._dbus_interface

1066

.replace(orig_interface_name,

1067

alt_interface_name))

1649

alt_interface = attribute._dbus_interface.replace(

1650

orig_interface_name, alt_interface_name)

1068

1651

interface_names.add(alt_interface)

1069

1652

# Is this a D-Bus signal?

1070

1653

if getattr(attribute, "_dbus_is_signal", False):

1071

# Extract the original non-method function by

1072

# black magic

1073

nonmethod_func = (dict(

1654

# Extract the original non-method undecorated

1655

# function by black magic

1656

if sys.version_info.major == 2:

1657

nonmethod_func = (dict(

1074

1658

zip(attribute.func_code.co_freevars,

1075

attribute.__closure__))["func"]

1076

.cell_contents)

1659

attribute.__closure__))

1660

["func"].cell_contents)

1661

else:

1662

nonmethod_func = (dict(

1663

zip(attribute.__code__.co_freevars,

1664

attribute.__closure__))

1665

["func"].cell_contents)

1077

1666

# Create a new, but exactly alike, function

1078

1667

# object, and decorate it to be a new D-Bus signal

1079

1668

# with the alternate D-Bus interface name

1080

new_function = (dbus.service.signal

1081

(alt_interface,

1082

attribute._dbus_signature)

1083

(types.FunctionType(

1084

nonmethod_func.func_code,

1085

nonmethod_func.func_globals,

1086

nonmethod_func.func_name,

1087

nonmethod_func.func_defaults,

1088

nonmethod_func.func_closure)))

1669

new_function = copy_function(nonmethod_func)

1670

new_function = (dbus.service.signal(

1671

alt_interface,

1672

attribute._dbus_signature)(new_function))

1089

1673

# Copy annotations, if any

1090

1674

try:

1091

new_function._dbus_annotations = (

1092

dict(attribute._dbus_annotations))

1675

new_function._dbus_annotations = dict(

1676

attribute._dbus_annotations)

1093

1677

except AttributeError:

1094

1678

pass

1679

1095

1680

# Define a creator of a function to call both the

1096

1681

# original and alternate functions, so both the

1097

1682

# original and alternate signals gets sent when

1100

1685

"""This function is a scope container to pass

1101

1686

func1 and func2 to the "call_both" function

1102

1687

outside of its arguments"""

1688

1689

@functools.wraps(func2)

1103

1690

def call_both(*args, **kwargs):

1104

1691

"""This function will emit two D-Bus

1105

1692

signals by calling func1 and func2"""

1106

1693

func1(*args, **kwargs)

1107

1694

func2(*args, **kwargs)

1695

# Make wrapper function look like a D-Bus

1696

# signal

1697

for name, attr in inspect.getmembers(func2):

1698

if name.startswith("_dbus_"):

1699

setattr(call_both, name, attr)

1700

1108

1701

return call_both

1109

1702

# Create the "call_both" function and add it to

1110

1703

# the class

1115

1708

# object. Decorate it to be a new D-Bus method

1116

1709

# with the alternate D-Bus interface name. Add it

1117

1710

# to the class.

1118

attr[attrname] = (dbus.service.method

1119

(alt_interface,

1120

attribute._dbus_in_signature,

1121

attribute._dbus_out_signature)

1122

(types.FunctionType

1123

(attribute.func_code,

1124

attribute.func_globals,

1125

attribute.func_name,

1126

attribute.func_defaults,

1127

attribute.func_closure)))

1711

attr[attrname] = (

1712

dbus.service.method(

1713

alt_interface,

1714

attribute._dbus_in_signature,

1715

attribute._dbus_out_signature)

1716

(copy_function(attribute)))

1128

1717

# Copy annotations, if any

1129

1718

try:

1130

attr[attrname]._dbus_annotations = (

1131

dict(attribute._dbus_annotations))

1719

attr[attrname]._dbus_annotations = dict(

1720

attribute._dbus_annotations)

1132

1721

except AttributeError:

1133

1722

pass

1134

1723

# Is this a D-Bus property?

1137

1726

# object, and decorate it to be a new D-Bus

1138

1727

# property with the alternate D-Bus interface

1139

1728

# name. Add it to the class.

1140

attr[attrname] = (dbus_service_property

1141

(alt_interface,

1142

attribute._dbus_signature,

1143

attribute._dbus_access,

1144

attribute

1145

._dbus_get_args_options

1146

["byte_arrays"])

1147

(types.FunctionType

1148

(attribute.func_code,

1149

attribute.func_globals,

1150

attribute.func_name,

1151

attribute.func_defaults,

1152

attribute.func_closure)))

1729

attr[attrname] = (dbus_service_property(

1730

alt_interface, attribute._dbus_signature,

1731

attribute._dbus_access,

1732

attribute._dbus_get_args_options

1733

["byte_arrays"])

1734

(copy_function(attribute)))

1153

1735

# Copy annotations, if any

1154

1736

try:

1155

attr[attrname]._dbus_annotations = (

1156

dict(attribute._dbus_annotations))

1737

attr[attrname]._dbus_annotations = dict(

1738

attribute._dbus_annotations)

1157

1739

except AttributeError:

1158

1740

pass

1159

1741

# Is this a D-Bus interface?

1162

1744

# object. Decorate it to be a new D-Bus interface

1163

1745

# with the alternate D-Bus interface name. Add it

1164

1746

# to the class.

1165

attr[attrname] = (dbus_interface_annotations

1166

(alt_interface)

1167

(types.FunctionType

1168

(attribute.func_code,

1169

attribute.func_globals,

1170

attribute.func_name,

1171

attribute.func_defaults,

1172

attribute.func_closure)))

1747

attr[attrname] = (

1748

dbus_interface_annotations(alt_interface)

1749

(copy_function(attribute)))

1173

1750

if deprecate:

1174

1751

# Deprecate all alternate interfaces

1175

iname="_AlternateDBusNames_interface_annotation{0}"

1752

iname = "_AlternateDBusNames_interface_annotation{}"

1176

1753

for interface_name in interface_names:

1754

1177

1755

@dbus_interface_annotations(interface_name)

1178

1756

def func(self):

1179

return { "org.freedesktop.DBus.Deprecated":

1180

"true" }

1757

return {"org.freedesktop.DBus.Deprecated":

1758

"true"}

1181

1759

# Find an unused name

1182

1760

for aname in (iname.format(i)

1183

1761

for i in itertools.count()):

1187

1765

if interface_names:

1188

1766

# Replace the class with a new subclass of it with

1189

1767

# methods, signals, etc. as created above.

1190

cls = type(b"{0}Alternate".format(cls.__name__),

1191

(cls,), attr)

1768

if sys.version_info.major == 2:

1769

cls = type(b"{}Alternate".format(cls.__name__),

1770

(cls, ), attr)

1771

else:

1772

cls = type("{}Alternate".format(cls.__name__),

1773

(cls, ), attr)

1192

1774

return cls

1775

1193

1776

return wrapper

1194

1777

1195

1778

1196

1779

@alternate_dbus_interfaces({"se.recompile.Mandos":

1197

"se.bsnet.fukt.Mandos"})

1780

"se.bsnet.fukt.Mandos"})

1198

1781

class ClientDBus(Client, DBusObjectWithProperties):

1199

1782

"""A Client class using D-Bus

1200

1783

1201

1784

Attributes:

1202

1785

dbus_object_path: dbus.ObjectPath

1203

1786

bus: dbus.SystemBus()

1204

1787

"""

1205

1788

1206

1789

runtime_expansions = (Client.runtime_expansions

1207

+ ("dbus_object_path",))

1208

1790

+ ("dbus_object_path", ))

1791

1792

_interface = "se.recompile.Mandos.Client"

1793

1209

1794

# dbus.service.Object doesn't use super(), so we can't either.

1210

1211

def __init__(self, bus = None, *args, **kwargs):

1795

1796

def __init__(self, bus=None, *args, **kwargs):

1212

1797

self.bus = bus

1213

1798

Client.__init__(self, *args, **kwargs)

1214

1799

# Only now, when this client is initialized, can it show up on

1215

1800

# the D-Bus

1216

client_object_name = unicode(self.name).translate(

1801

client_object_name = str(self.name).translate(

1217

1802

{ord("."): ord("_"),

1218

1803

ord("-"): ord("_")})

1219

self.dbus_object_path = (dbus.ObjectPath

1220

("/clients/" + client_object_name))

1804

self.dbus_object_path = dbus.ObjectPath(

1805

"/clients/" + client_object_name)

1221

1806

DBusObjectWithProperties.__init__(self, self.bus,

1222

1807

self.dbus_object_path)

1223

1224

def notifychangeproperty(transform_func,

1225

dbus_name, type_func=lambda x: x,

1226

variant_level=1):

1808

1809

def notifychangeproperty(transform_func, dbus_name,

1810

type_func=lambda x: x,

1811

variant_level=1,

1812

invalidate_only=False,

1813

_interface=_interface):

1227

1814

""" Modify a variable so that it's a property which announces

1228

1815

its changes to DBus.

1229

1816

1230

1817

transform_fun: Function that takes a value and a variant_level

1231

1818

and transforms it to a D-Bus type.

1232

1819

dbus_name: D-Bus name of the variable

1234

1821

to the D-Bus. Default: no transform

1235

1822

variant_level: D-Bus variant level. Default: 1

1236

1823

"""

1237

attrname = "_{0}".format(dbus_name)

1824

attrname = "_{}".format(dbus_name)

1825

1238

1826

def setter(self, value):

1239

1827

if hasattr(self, "dbus_object_path"):

1240

1828

if (not hasattr(self, attrname) or

1241

1829

type_func(getattr(self, attrname, None))

1242

1830

!= type_func(value)):

1243

dbus_value = transform_func(type_func(value),

1244

variant_level

1245

=variant_level)

1246

self.PropertyChanged(dbus.String(dbus_name),

1247

dbus_value)

1831

if invalidate_only:

1832

self.PropertiesChanged(

1833

_interface, dbus.Dictionary(),

1834

dbus.Array((dbus_name, )))

1835

else:

1836

dbus_value = transform_func(

1837

type_func(value),

1838

variant_level=variant_level)

1839

self.PropertyChanged(dbus.String(dbus_name),

1840

dbus_value)

1841

self.PropertiesChanged(

1842

_interface,

1843

dbus.Dictionary({dbus.String(dbus_name):

1844

dbus_value}),

1845

dbus.Array())

1248

1846

setattr(self, attrname, value)

1249

1847

1250

1848

return property(lambda self: getattr(self, attrname), setter)

1251

1849

1252

1850

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1253

1851

approvals_pending = notifychangeproperty(dbus.Boolean,

1254

1852

"ApprovalPending",

1255

type_func = bool)

1853

type_func=bool)

1256

1854

enabled = notifychangeproperty(dbus.Boolean, "Enabled")

1257

1855

last_enabled = notifychangeproperty(datetime_to_dbus,

1258

1856

"LastEnabled")

1259

checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",

1260

type_func = lambda checker:

1261

checker is not None)

1857

checker = notifychangeproperty(

1858

dbus.Boolean, "CheckerRunning",

1859

type_func=lambda checker: checker is not None)

1262

1860

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1263

1861

"LastCheckedOK")

1264

1862

last_checker_status = notifychangeproperty(dbus.Int16,

1267

1865

datetime_to_dbus, "LastApprovalRequest")

1268

1866

approved_by_default = notifychangeproperty(dbus.Boolean,

1269

1867

"ApprovedByDefault")

1270

approval_delay = notifychangeproperty(dbus.UInt64,

1271

"ApprovalDelay",

1272

type_func =

1273

timedelta_to_milliseconds)

1868

approval_delay = notifychangeproperty(

1869

dbus.UInt64, "ApprovalDelay",

1870

type_func=lambda td: td.total_seconds() * 1000)

1274

1871

approval_duration = notifychangeproperty(

1275

1872

dbus.UInt64, "ApprovalDuration",

1276

type_func = timedelta_to_milliseconds)

1873

type_func=lambda td: td.total_seconds() * 1000)

1277

1874

host = notifychangeproperty(dbus.String, "Host")

1278

timeout = notifychangeproperty(dbus.UInt64, "Timeout",

1279

type_func =

1280

timedelta_to_milliseconds)

1875

timeout = notifychangeproperty(

1876

dbus.UInt64, "Timeout",

1877

type_func=lambda td: td.total_seconds() * 1000)

1281

1878

extended_timeout = notifychangeproperty(

1282

1879

dbus.UInt64, "ExtendedTimeout",

1283

type_func = timedelta_to_milliseconds)

1284

interval = notifychangeproperty(dbus.UInt64,

1285

"Interval",

1286

type_func =

1287

timedelta_to_milliseconds)

1880

type_func=lambda td: td.total_seconds() * 1000)

1881

interval = notifychangeproperty(

1882

dbus.UInt64, "Interval",

1883

type_func=lambda td: td.total_seconds() * 1000)

1288

1884

checker_command = notifychangeproperty(dbus.String, "Checker")

1289

1885

secret = notifychangeproperty(dbus.ByteArray, "Secret",

1886

invalidate_only=True)

1887

1290

1888

del notifychangeproperty

1291

1889

1292

1890

def __del__(self, *args, **kwargs):

1293

1891

try:

1294

1892

self.remove_from_connection()

1297

1895

if hasattr(DBusObjectWithProperties, "__del__"):

1298

1896

DBusObjectWithProperties.__del__(self, *args, **kwargs)

1299

1897

Client.__del__(self, *args, **kwargs)

1300

1301

def checker_callback(self, pid, condition, command,

1302

*args, **kwargs):

1303

self.checker_callback_tag = None

1304

self.checker = None

1305

if os.WIFEXITED(condition):

1306

exitstatus = os.WEXITSTATUS(condition)

1898

1899

def checker_callback(self, source, condition,

1900

connection, command, *args, **kwargs):

1901

ret = Client.checker_callback(self, source, condition,

1902

connection, command, *args,

1903

**kwargs)

1904

exitstatus = self.last_checker_status

1905

if exitstatus >= 0:

1307

1906

# Emit D-Bus signal

1308

1907

self.CheckerCompleted(dbus.Int16(exitstatus),

1309

dbus.Int64(condition),

1908

# This is specific to GNU libC

1909

dbus.Int64(exitstatus << 8),

1310

1910

dbus.String(command))

1311

1911

else:

1312

1912

# Emit D-Bus signal

1313

1913

self.CheckerCompleted(dbus.Int16(-1),

1314

dbus.Int64(condition),

1914

dbus.Int64(

1915

# This is specific to GNU libC

1916

(exitstatus << 8)

1917

| self.last_checker_signal),

1315

1918

dbus.String(command))

1316

1317

return Client.checker_callback(self, pid, condition, command,

1318

*args, **kwargs)

1319

1919

return ret

1920

1320

1921

def start_checker(self, *args, **kwargs):

1321

old_checker = self.checker

1322

if self.checker is not None:

1323

old_checker_pid = self.checker.pid

1324

else:

1325

old_checker_pid = None

1922

old_checker_pid = getattr(self.checker, "pid", None)

1326

1923

r = Client.start_checker(self, *args, **kwargs)

1327

1924

# Only if new checker process was started

1328

1925

if (self.checker is not None

1330

1927

# Emit D-Bus signal

1331

1928

self.CheckerStarted(self.current_checker_command)

1332

1929

return r

1333

1930

1334

1931

def _reset_approved(self):

1335

1932

self.approved = None

1336

1933

return False

1337

1934

1338

1935

def approve(self, value=True):

1339

1936

self.approved = value

1340

gobject.timeout_add(timedelta_to_milliseconds

1341

(self.approval_duration),

1342

self._reset_approved)

1937

GLib.timeout_add(int(self.approval_duration.total_seconds()

1938

* 1000), self._reset_approved)

1343

1939

self.send_changedstate()

1344

1345

## D-Bus methods, signals & properties

1346

_interface = "se.recompile.Mandos.Client"

1347

1348

## Interfaces

1349

1350

@dbus_interface_annotations(_interface)

1351

def _foo(self):

1352

return { "org.freedesktop.DBus.Property.EmitsChangedSignal":

1353

"false"}

1354

1355

## Signals

1356

1940

1941

# D-Bus methods, signals & properties

1942

1943

# Interfaces

1944

1945

# Signals

1946

1357

1947

# CheckerCompleted - signal

1358

1948

@dbus.service.signal(_interface, signature="nxs")

1359

1949

def CheckerCompleted(self, exitcode, waitstatus, command):

1360

1950

"D-Bus signal"

1361

1951

pass

1362

1952

1363

1953

# CheckerStarted - signal

1364

1954

@dbus.service.signal(_interface, signature="s")

1365

1955

def CheckerStarted(self, command):

1366

1956

"D-Bus signal"

1367

1957

pass

1368

1958

1369

1959

# PropertyChanged - signal

1960

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

1370

1961

@dbus.service.signal(_interface, signature="sv")

1371

1962

def PropertyChanged(self, property, value):

1372

1963

"D-Bus signal"

1373

1964

pass

1374

1965

1375

1966

# GotSecret - signal

1376

1967

@dbus.service.signal(_interface)

1377

1968

def GotSecret(self):

1380

1971

server to mandos-client

1381

1972

"""

1382

1973

pass

1383

1974

1384

1975

# Rejected - signal

1385

1976

@dbus.service.signal(_interface, signature="s")

1386

1977

def Rejected(self, reason):

1387

1978

"D-Bus signal"

1388

1979

pass

1389

1980

1390

1981

# NeedApproval - signal

1391

1982

@dbus.service.signal(_interface, signature="tb")

1392

1983

def NeedApproval(self, timeout, default):

1393

1984

"D-Bus signal"

1394

1985

return self.need_approval()

1395

1396

## Methods

1397

1986

1987

# Methods

1988

1398

1989

# Approve - method

1399

1990

@dbus.service.method(_interface, in_signature="b")

1400

1991

def Approve(self, value):

1401

1992

self.approve(value)

1402

1993

1403

1994

# CheckedOK - method

1404

1995

@dbus.service.method(_interface)

1405

1996

def CheckedOK(self):

1406

1997

self.checked_ok()

1407

1998

1408

1999

# Enable - method

2000

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

1409

2001

@dbus.service.method(_interface)

1410

2002

def Enable(self):

1411

2003

"D-Bus method"

1412

2004

self.enable()

1413

2005

1414

2006

# StartChecker - method

2007

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

1415

2008

@dbus.service.method(_interface)

1416

2009

def StartChecker(self):

1417

2010

"D-Bus method"

1418

2011

self.start_checker()

1419

2012

1420

2013

# Disable - method

2014

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

1421

2015

@dbus.service.method(_interface)

1422

2016

def Disable(self):

1423

2017

"D-Bus method"

1424

2018

self.disable()

1425

2019

1426

2020

# StopChecker - method

2021

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

1427

2022

@dbus.service.method(_interface)

1428

2023

def StopChecker(self):

1429

2024

self.stop_checker()

1430

1431

## Properties

1432

2025

2026

# Properties

2027

1433

2028

# ApprovalPending - property

1434

2029

@dbus_service_property(_interface, signature="b", access="read")

1435

2030

def ApprovalPending_dbus_property(self):

1436

2031

return dbus.Boolean(bool(self.approvals_pending))

1437

2032

1438

2033

# ApprovedByDefault - property

1439

@dbus_service_property(_interface, signature="b",

2034

@dbus_service_property(_interface,

2035

signature="b",

1440

2036

access="readwrite")

1441

2037

def ApprovedByDefault_dbus_property(self, value=None):

1442

2038

if value is None: # get

1443

2039

return dbus.Boolean(self.approved_by_default)

1444

2040

self.approved_by_default = bool(value)

1445

2041

1446

2042

# ApprovalDelay - property

1447

@dbus_service_property(_interface, signature="t",

2043

@dbus_service_property(_interface,

2044

signature="t",

1448

2045

access="readwrite")

1449

2046

def ApprovalDelay_dbus_property(self, value=None):

1450

2047

if value is None: # get

1451

return dbus.UInt64(self.approval_delay_milliseconds())

2048

return dbus.UInt64(self.approval_delay.total_seconds()

2049

* 1000)

1452

2050

self.approval_delay = datetime.timedelta(0, 0, 0, value)

1453

2051

1454

2052

# ApprovalDuration - property

1455

@dbus_service_property(_interface, signature="t",

2053

@dbus_service_property(_interface,

2054

signature="t",

1456

2055

access="readwrite")

1457

2056

def ApprovalDuration_dbus_property(self, value=None):

1458

2057

if value is None: # get

1459

return dbus.UInt64(timedelta_to_milliseconds(

1460

self.approval_duration))

2058

return dbus.UInt64(self.approval_duration.total_seconds()

2059

* 1000)

1461

2060

self.approval_duration = datetime.timedelta(0, 0, 0, value)

1462

2061

1463

2062

# Name - property

2063

@dbus_annotations(

2064

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1464

2065

@dbus_service_property(_interface, signature="s", access="read")

1465

2066

def Name_dbus_property(self):

1466

2067

return dbus.String(self.name)

1467

2068

2069

# KeyID - property

2070

@dbus_annotations(

2071

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

2072

@dbus_service_property(_interface, signature="s", access="read")

2073

def KeyID_dbus_property(self):

2074

return dbus.String(self.key_id)

2075

1468

2076

# Fingerprint - property

2077

@dbus_annotations(

2078

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1469

2079

@dbus_service_property(_interface, signature="s", access="read")

1470

2080

def Fingerprint_dbus_property(self):

1471

2081

return dbus.String(self.fingerprint)

1472

2082

1473

2083

# Host - property

1474

@dbus_service_property(_interface, signature="s",

2084

@dbus_service_property(_interface,

2085

signature="s",

1475

2086

access="readwrite")

1476

2087

def Host_dbus_property(self, value=None):

1477

2088

if value is None: # get

1478

2089

return dbus.String(self.host)

1479

self.host = unicode(value)

1480

2090

self.host = str(value)

2091

1481

2092

# Created - property

2093

@dbus_annotations(

2094

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1482

2095

@dbus_service_property(_interface, signature="s", access="read")

1483

2096

def Created_dbus_property(self):

1484

2097

return datetime_to_dbus(self.created)

1485

2098

1486

2099

# LastEnabled - property

1487

2100

@dbus_service_property(_interface, signature="s", access="read")

1488

2101

def LastEnabled_dbus_property(self):

1489

2102

return datetime_to_dbus(self.last_enabled)

1490

2103

1491

2104

# Enabled - property

1492

@dbus_service_property(_interface, signature="b",

2105

@dbus_service_property(_interface,

2106

signature="b",

1493

2107

access="readwrite")

1494

2108

def Enabled_dbus_property(self, value=None):

1495

2109

if value is None: # get

1498

2112

self.enable()

1499

2113

else:

1500

2114

self.disable()

1501

2115

1502

2116

# LastCheckedOK - property

1503

@dbus_service_property(_interface, signature="s",

2117

@dbus_service_property(_interface,

2118

signature="s",

1504

2119

access="readwrite")

1505

2120

def LastCheckedOK_dbus_property(self, value=None):

1506

2121

if value is not None:

1507

2122

self.checked_ok()

1508

2123

return

1509

2124

return datetime_to_dbus(self.last_checked_ok)

1510

2125

1511

2126

# LastCheckerStatus - property

1512

@dbus_service_property(_interface, signature="n",

1513

access="read")

2127

@dbus_service_property(_interface, signature="n", access="read")

1514

2128

def LastCheckerStatus_dbus_property(self):

1515

2129

return dbus.Int16(self.last_checker_status)

1516

2130

1517

2131

# Expires - property

1518

2132

@dbus_service_property(_interface, signature="s", access="read")

1519

2133

def Expires_dbus_property(self):

1520

2134

return datetime_to_dbus(self.expires)

1521

2135

1522

2136

# LastApprovalRequest - property

1523

2137

@dbus_service_property(_interface, signature="s", access="read")

1524

2138

def LastApprovalRequest_dbus_property(self):

1525

2139

return datetime_to_dbus(self.last_approval_request)

1526

2140

1527

2141

# Timeout - property

1528

@dbus_service_property(_interface, signature="t",

2142

@dbus_service_property(_interface,

2143

signature="t",

1529

2144

access="readwrite")

1530

2145

def Timeout_dbus_property(self, value=None):

1531

2146

if value is None: # get

1532

return dbus.UInt64(self.timeout_milliseconds())

2147

return dbus.UInt64(self.timeout.total_seconds() * 1000)

1533

2148

old_timeout = self.timeout

1534

2149

self.timeout = datetime.timedelta(0, 0, 0, value)

1535

2150

# Reschedule disabling

1543

2158

if (getattr(self, "disable_initiator_tag", None)

1544

2159

is None):

1545

2160

return

1546

gobject.source_remove(self.disable_initiator_tag)

1547

self.disable_initiator_tag = (

1548

gobject.timeout_add(

1549

timedelta_to_milliseconds(self.expires - now),

1550

self.disable))

1551

2161

GLib.source_remove(self.disable_initiator_tag)

2162

self.disable_initiator_tag = GLib.timeout_add(

2163

int((self.expires - now).total_seconds() * 1000),

2164

self.disable)

2165

1552

2166

# ExtendedTimeout - property

1553

@dbus_service_property(_interface, signature="t",

2167

@dbus_service_property(_interface,

2168

signature="t",

1554

2169

access="readwrite")

1555

2170

def ExtendedTimeout_dbus_property(self, value=None):

1556

2171

if value is None: # get

1557

return dbus.UInt64(self.extended_timeout_milliseconds())

2172

return dbus.UInt64(self.extended_timeout.total_seconds()

2173

* 1000)

1558

2174

self.extended_timeout = datetime.timedelta(0, 0, 0, value)

1559

2175

1560

2176

# Interval - property

1561

@dbus_service_property(_interface, signature="t",

2177

@dbus_service_property(_interface,

2178

signature="t",

1562

2179

access="readwrite")

1563

2180

def Interval_dbus_property(self, value=None):

1564

2181

if value is None: # get

1565

return dbus.UInt64(self.interval_milliseconds())

2182

return dbus.UInt64(self.interval.total_seconds() * 1000)

1566

2183

self.interval = datetime.timedelta(0, 0, 0, value)

1567

2184

if getattr(self, "checker_initiator_tag", None) is None:

1568

2185

return

1569

2186

if self.enabled:

1570

2187

# Reschedule checker run

1571

gobject.source_remove(self.checker_initiator_tag)

1572

self.checker_initiator_tag = (gobject.timeout_add

1573

(value, self.start_checker))

1574

self.start_checker() # Start one now, too

1575

2188

GLib.source_remove(self.checker_initiator_tag)

2189

self.checker_initiator_tag = GLib.timeout_add(

2190

value, self.start_checker)

2191

self.start_checker() # Start one now, too

2192

1576

2193

# Checker - property

1577

@dbus_service_property(_interface, signature="s",

2194

@dbus_service_property(_interface,

2195

signature="s",

1578

2196

access="readwrite")

1579

2197

def Checker_dbus_property(self, value=None):

1580

2198

if value is None: # get

1581

2199

return dbus.String(self.checker_command)

1582

self.checker_command = unicode(value)

1583

2200

self.checker_command = str(value)

2201

1584

2202

# CheckerRunning - property

1585

@dbus_service_property(_interface, signature="b",

2203

@dbus_service_property(_interface,

2204

signature="b",

1586

2205

access="readwrite")

1587

2206

def CheckerRunning_dbus_property(self, value=None):

1588

2207

if value is None: # get

1591

2210

self.start_checker()

1592

2211

else:

1593

2212

self.stop_checker()

1594

2213

1595

2214

# ObjectPath - property

2215

@dbus_annotations(

2216

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",

2217

"org.freedesktop.DBus.Deprecated": "true"})

1596

2218

@dbus_service_property(_interface, signature="o", access="read")

1597

2219

def ObjectPath_dbus_property(self):

1598

return self.dbus_object_path # is already a dbus.ObjectPath

1599

2220

return self.dbus_object_path # is already a dbus.ObjectPath

2221

1600

2222

# Secret = property

1601

@dbus_service_property(_interface, signature="ay",

1602

access="write", byte_arrays=True)

2223

@dbus_annotations(

2224

{"org.freedesktop.DBus.Property.EmitsChangedSignal":

2225

"invalidates"})

2226

@dbus_service_property(_interface,

2227

signature="ay",

2228

access="write",

2229

byte_arrays=True)

1603

2230

def Secret_dbus_property(self, value):

1604

self.secret = str(value)

1605

2231

self.secret = bytes(value)

2232

1606

2233

del _interface

1607

2234

1608

2235

1609

class ProxyClient(object):

1610

def __init__(self, child_pipe, fpr, address):

2236

class ProxyClient:

2237

def __init__(self, child_pipe, key_id, fpr, address):

1611

2238

self._pipe = child_pipe

1612

self._pipe.send(('init', fpr, address))

2239

self._pipe.send(('init', key_id, fpr, address))

1613

2240

if not self._pipe.recv():

1614

raise KeyError()

1615

2241

raise KeyError(key_id or fpr)

2242

1616

2243

def __getattribute__(self, name):

1617

2244

if name == '_pipe':

1618

2245

return super(ProxyClient, self).__getattribute__(name)

1621

2248

if data[0] == 'data':

1622

2249

return data[1]

1623

2250

if data[0] == 'function':

2251

1624

2252

def func(*args, **kwargs):

1625

2253

self._pipe.send(('funcall', name, args, kwargs))

1626

2254

return self._pipe.recv()[1]

2255

1627

2256

return func

1628

2257

1629

2258

def __setattr__(self, name, value):

1630

2259

if name == '_pipe':

1631

2260

return super(ProxyClient, self).__setattr__(name, value)

1634

2263

1635

2264

class ClientHandler(socketserver.BaseRequestHandler, object):

1636

2265

"""A class to handle client connections.

1637

2266

1638

2267

Instantiated once for each connection to handle it.

1639

2268

Note: This will run in its own forked process."""

1640

2269

1641

2270

def handle(self):

1642

2271

with contextlib.closing(self.server.child_pipe) as child_pipe:

1643

2272

logger.info("TCP connection from: %s",

1644

unicode(self.client_address))

2273

str(self.client_address))

1645

2274

logger.debug("Pipe FD: %d",

1646

2275

self.server.child_pipe.fileno())

1647

1648

session = (gnutls.connection

1649

.ClientSession(self.request,

1650

gnutls.connection

1651

.X509Credentials()))

1652

1653

# Note: gnutls.connection.X509Credentials is really a

1654

# generic GnuTLS certificate credentials object so long as

1655

# no X.509 keys are added to it. Therefore, we can use it

1656

# here despite using OpenPGP certificates.

1657

1658

#priority = ':'.join(("NONE", "+VERS-TLS1.1",

1659

# "+AES-256-CBC", "+SHA1",

1660

# "+COMP-NULL", "+CTYPE-OPENPGP",

1661

# "+DHE-DSS"))

2276

2277

session = gnutls.ClientSession(self.request)

2278

2279

# priority = ':'.join(("NONE", "+VERS-TLS1.1",

2280

# "+AES-256-CBC", "+SHA1",

2281

# "+COMP-NULL", "+CTYPE-OPENPGP",

2282

# "+DHE-DSS"))

1662

2283

# Use a fallback default, since this MUST be set.

1663

2284

priority = self.server.gnutls_priority

1664

2285

if priority is None:

1665

2286

priority = "NORMAL"

1666

(gnutls.library.functions

1667

.gnutls_priority_set_direct(session._c_object,

1668

priority, None))

1669

2287

gnutls.priority_set_direct(session._c_object,

2288

priority.encode("utf-8"),

2289

None)

2290

1670

2291

# Start communication using the Mandos protocol

1671

2292

# Get protocol number

1672

2293

line = self.request.makefile().readline()

1673

2294

logger.debug("Protocol version: %r", line)

1674

2295

try:

1675

2296

if int(line.strip().split()[0]) > 1:

1676

raise RuntimeError

2297

raise RuntimeError(line)

1677

2298

except (ValueError, IndexError, RuntimeError) as error:

1678

2299

logger.error("Unknown protocol version: %s", error)

1679

2300

return

1680

2301

1681

2302

# Start GnuTLS connection

1682

2303

try:

1683

2304

session.handshake()

1684

except gnutls.errors.GNUTLSError as error:

2305

except gnutls.Error as error:

1685

2306

logger.warning("Handshake failed: %s", error)

1686

2307

# Do not run session.bye() here: the session is not

1687

2308

# established. Just abandon the request.

1688

2309

return

1689

2310

logger.debug("Handshake succeeded")

1690

2311

1691

2312

approval_required = False

1692

2313

try:

1693

try:

1694

fpr = self.fingerprint(self.peer_certificate

1695

(session))

1696

except (TypeError,

1697

gnutls.errors.GNUTLSError) as error:

1698

logger.warning("Bad certificate: %s", error)

1699

return

1700

logger.debug("Fingerprint: %s", fpr)

1701

1702

try:

1703

client = ProxyClient(child_pipe, fpr,

2314

if gnutls.has_rawpk:

2315

fpr = b""

2316

try:

2317

key_id = self.key_id(

2318

self.peer_certificate(session))

2319

except (TypeError, gnutls.Error) as error:

2320

logger.warning("Bad certificate: %s", error)

2321

return

2322

logger.debug("Key ID: %s", key_id)

2323

2324

else:

2325

key_id = b""

2326

try:

2327

fpr = self.fingerprint(

2328

self.peer_certificate(session))

2329

except (TypeError, gnutls.Error) as error:

2330

logger.warning("Bad certificate: %s", error)

2331

return

2332

logger.debug("Fingerprint: %s", fpr)

2333

2334

try:

2335

client = ProxyClient(child_pipe, key_id, fpr,

1704

2336

self.client_address)

1705

2337

except KeyError:

1706

2338

return

1707

2339

1708

2340

if client.approval_delay:

1709

2341

delay = client.approval_delay

1710

2342

client.approvals_pending += 1

1711

2343

approval_required = True

1712

2344

1713

2345

while True:

1714

2346

if not client.enabled:

1715

2347

logger.info("Client %s is disabled",

1716

client.name)

2348

client.name)

1717

2349

if self.server.use_dbus:

1718

2350

# Emit D-Bus signal

1719

2351

client.Rejected("Disabled")

1720

2352

return

1721

2353

1722

2354

if client.approved or not client.approval_delay:

1723

#We are approved or approval is disabled

2355

# We are approved or approval is disabled

1724

2356

break

1725

2357

elif client.approved is None:

1726

2358

logger.info("Client %s needs approval",

1728

2360

if self.server.use_dbus:

1729

2361

# Emit D-Bus signal

1730

2362

client.NeedApproval(

1731

client.approval_delay_milliseconds(),

1732

client.approved_by_default)

2363

client.approval_delay.total_seconds()

2364

* 1000, client.approved_by_default)

1733

2365

else:

1734

2366

logger.warning("Client %s was not approved",

1735

2367

client.name)

1737

2369

# Emit D-Bus signal

1738

2370

client.Rejected("Denied")

1739

2371

return

1740

1741

#wait until timeout or approved

2372

2373

# wait until timeout or approved

1742

2374

time = datetime.datetime.now()

1743

2375

client.changedstate.acquire()

1744

client.changedstate.wait(

1745

float(timedelta_to_milliseconds(delay)

1746

/ 1000))

2376

client.changedstate.wait(delay.total_seconds())

1747

2377

client.changedstate.release()

1748

2378

time2 = datetime.datetime.now()

1749

2379

if (time2 - time) >= delay:

1759

2389

break

1760

2390

else:

1761

2391

delay -= time2 - time

1762

1763

sent_size = 0

1764

while sent_size < len(client.secret):

1765

try:

1766

sent = session.send(client.secret[sent_size:])

1767

except gnutls.errors.GNUTLSError as error:

1768

logger.warning("gnutls send failed",

1769

exc_info=error)

1770

return

1771

logger.debug("Sent: %d, remaining: %d",

1772

sent, len(client.secret)

1773

- (sent_size + sent))

1774

sent_size += sent

1775

2392

2393

try:

2394

session.send(client.secret)

2395

except gnutls.Error as error:

2396

logger.warning("gnutls send failed",

2397

exc_info=error)

2398

return

2399

1776

2400

logger.info("Sending secret to %s", client.name)

1777

2401

# bump the timeout using extended_timeout

1778

2402

client.bump_timeout(client.extended_timeout)

1779

2403

if self.server.use_dbus:

1780

2404

# Emit D-Bus signal

1781

2405

client.GotSecret()

1782

2406

1783

2407

finally:

1784

2408

if approval_required:

1785

2409

client.approvals_pending -= 1

1786

2410

try:

1787

2411

session.bye()

1788

except gnutls.errors.GNUTLSError as error:

2412

except gnutls.Error as error:

1789

2413

logger.warning("GnuTLS bye failed",

1790

2414

exc_info=error)

1791

2415

1792

2416

@staticmethod

1793

2417

def peer_certificate(session):

1794

"Return the peer's OpenPGP certificate as a bytestring"

1795

# If not an OpenPGP certificate...

1796

if (gnutls.library.functions

1797

.gnutls_certificate_type_get(session._c_object)

1798

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1799

# ...do the normal thing

1800

return session.peer_certificate

2418

"Return the peer's certificate as a bytestring"

2419

try:

2420

cert_type = gnutls.certificate_type_get2(session._c_object,

2421

gnutls.CTYPE_PEERS)

2422

except AttributeError:

2423

cert_type = gnutls.certificate_type_get(session._c_object)

2424

if gnutls.has_rawpk:

2425

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2426

else:

2427

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2428

# If not a valid certificate type...

2429

if cert_type not in valid_cert_types:

2430

logger.info("Cert type %r not in %r", cert_type,

2431

valid_cert_types)

2432

# ...return invalid data

2433

return b""

1801

2434

list_size = ctypes.c_uint(1)

1802

cert_list = (gnutls.library.functions

1803

.gnutls_certificate_get_peers

2435

cert_list = (gnutls.certificate_get_peers

1804

2436

(session._c_object, ctypes.byref(list_size)))

1805

2437

if not bool(cert_list) and list_size.value != 0:

1806

raise gnutls.errors.GNUTLSError("error getting peer"

1807

" certificate")

2438

raise gnutls.Error("error getting peer certificate")

1808

2439

if list_size.value == 0:

1809

2440

return None

1810

2441

cert = cert_list[0]

1811

2442

return ctypes.string_at(cert.data, cert.size)

1812

2443

2444

@staticmethod

2445

def key_id(certificate):

2446

"Convert a certificate bytestring to a hexdigit key ID"

2447

# New GnuTLS "datum" with the public key

2448

datum = gnutls.datum_t(

2449

ctypes.cast(ctypes.c_char_p(certificate),

2450

ctypes.POINTER(ctypes.c_ubyte)),

2451

ctypes.c_uint(len(certificate)))

2452

# XXX all these need to be created in the gnutls "module"

2453

# New empty GnuTLS certificate

2454

pubkey = gnutls.pubkey_t()

2455

gnutls.pubkey_init(ctypes.byref(pubkey))

2456

# Import the raw public key into the certificate

2457

gnutls.pubkey_import(pubkey,

2458

ctypes.byref(datum),

2459

gnutls.X509_FMT_DER)

2460

# New buffer for the key ID

2461

buf = ctypes.create_string_buffer(32)

2462

buf_len = ctypes.c_size_t(len(buf))

2463

# Get the key ID from the raw public key into the buffer

2464

gnutls.pubkey_get_key_id(pubkey,

2465

gnutls.KEYID_USE_SHA256,

2466

ctypes.cast(ctypes.byref(buf),

2467

ctypes.POINTER(ctypes.c_ubyte)),

2468

ctypes.byref(buf_len))

2469

# Deinit the certificate

2470

gnutls.pubkey_deinit(pubkey)

2471

2472

# Convert the buffer to a Python bytestring

2473

key_id = ctypes.string_at(buf, buf_len.value)

2474

# Convert the bytestring to hexadecimal notation

2475

hex_key_id = binascii.hexlify(key_id).upper()

2476

return hex_key_id

2477

1813

2478

@staticmethod

1814

2479

def fingerprint(openpgp):

1815

2480

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1816

2481

# New GnuTLS "datum" with the OpenPGP public key

1817

datum = (gnutls.library.types

1818

.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),

1819

ctypes.POINTER

1820

(ctypes.c_ubyte)),

1821

ctypes.c_uint(len(openpgp))))

2482

datum = gnutls.datum_t(

2483

ctypes.cast(ctypes.c_char_p(openpgp),

2484

ctypes.POINTER(ctypes.c_ubyte)),

2485

ctypes.c_uint(len(openpgp)))

1822

2486

# New empty GnuTLS certificate

1823

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1824

(gnutls.library.functions

1825

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2487

crt = gnutls.openpgp_crt_t()

2488

gnutls.openpgp_crt_init(ctypes.byref(crt))

1826

2489

# Import the OpenPGP public key into the certificate

1827

(gnutls.library.functions

1828

.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),

1829

gnutls.library.constants

1830

.GNUTLS_OPENPGP_FMT_RAW))

2490

gnutls.openpgp_crt_import(crt, ctypes.byref(datum),

2491

gnutls.OPENPGP_FMT_RAW)

1831

2492

# Verify the self signature in the key

1832

2493

crtverify = ctypes.c_uint()

1833

(gnutls.library.functions

1834

.gnutls_openpgp_crt_verify_self(crt, 0,

1835

ctypes.byref(crtverify)))

2494

gnutls.openpgp_crt_verify_self(crt, 0,

2495

ctypes.byref(crtverify))

1836

2496

if crtverify.value != 0:

1837

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1838

raise (gnutls.errors.CertificateSecurityError

1839

("Verify failed"))

2497

gnutls.openpgp_crt_deinit(crt)

2498

raise gnutls.CertificateSecurityError(code

2499

=crtverify.value)

1840

2500

# New buffer for the fingerprint

1841

2501

buf = ctypes.create_string_buffer(20)

1842

2502

buf_len = ctypes.c_size_t()

1843

2503

# Get the fingerprint from the certificate into the buffer

1844

(gnutls.library.functions

1845

.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),

1846

ctypes.byref(buf_len)))

2504

gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),

2505

ctypes.byref(buf_len))

1847

2506

# Deinit the certificate

1848

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2507

gnutls.openpgp_crt_deinit(crt)

1849

2508

# Convert the buffer to a Python bytestring

1850

2509

fpr = ctypes.string_at(buf, buf_len.value)

1851

2510

# Convert the bytestring to hexadecimal notation

1853

2512

return hex_fpr

1854

2513

1855

2514

1856

class MultiprocessingMixIn(object):

2515

class MultiprocessingMixIn:

1857

2516

"""Like socketserver.ThreadingMixIn, but with multiprocessing"""

2517

1858

2518

def sub_process_main(self, request, address):

1859

2519

try:

1860

2520

self.finish_request(request, address)

1861

2521

except Exception:

1862

2522

self.handle_error(request, address)

1863

2523

self.close_request(request)

1864

2524

1865

2525

def process_request(self, request, address):

1866

2526

"""Start a new process to process the request."""

1867

proc = multiprocessing.Process(target = self.sub_process_main,

1868

args = (request, address))

2527

proc = multiprocessing.Process(target=self.sub_process_main,

2528

args=(request, address))

1869

2529

proc.start()

1870

2530

return proc

1871

2531

1872

2532

1873

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2533

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

1874

2534

""" adds a pipe to the MixIn """

2535

1875

2536

def process_request(self, request, client_address):

1876

2537

"""Overrides and wraps the original process_request().

1877

2538

1878

2539

This function creates a new pipe in self.pipe

1879

2540

"""

1880

2541

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1881

2542

1882

2543

proc = MultiprocessingMixIn.process_request(self, request,

1883

2544

client_address)

1884

2545

self.child_pipe.close()

1885

2546

self.add_pipe(parent_pipe, proc)

1886

2547

1887

2548

def add_pipe(self, parent_pipe, proc):

1888

2549

"""Dummy function; override as necessary"""

1889

raise NotImplementedError

2550

raise NotImplementedError()

1890

2551

1891

2552

1892

2553

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1893

socketserver.TCPServer, object):

2554

socketserver.TCPServer):

1894

2555

"""IPv6-capable TCP server. Accepts 'None' as address and/or port

1895

2556

1896

2557

Attributes:

1897

2558

enabled: Boolean; whether this server is activated yet

1898

2559

interface: None or a network interface name (string)

1899

2560

use_ipv6: Boolean; to use IPv6 or not

1900

2561

"""

2562

1901

2563

def __init__(self, server_address, RequestHandlerClass,

1902

interface=None, use_ipv6=True, socketfd=None):

2564

interface=None,

2565

use_ipv6=True,

2566

socketfd=None):

1903

2567

"""If socketfd is set, use that file descriptor instead of

1904

2568

creating a new one with socket.socket().

1905

2569

"""

1911

2575

self.socketfd = socketfd

1912

2576

# Save the original socket.socket() function

1913

2577

self.socket_socket = socket.socket

2578

1914

2579

# To implement --socket, we monkey patch socket.socket.

1915

#

2580

#

1916

2581

# (When socketserver.TCPServer is a new-style class, we

1917

2582

# could make self.socket into a property instead of monkey

1918

2583

# patching socket.socket.)

1919

#

2584

#

1920

2585

# Create a one-time-only replacement for socket.socket()

1921

2586

@functools.wraps(socket.socket)

1922

2587

def socket_wrapper(*args, **kwargs):

1934

2599

# socket_wrapper(), if socketfd was set.

1935

2600

socketserver.TCPServer.__init__(self, server_address,

1936

2601

RequestHandlerClass)

1937

2602

1938

2603

def server_bind(self):

1939

2604

"""This overrides the normal server_bind() function

1940

2605

to bind to an interface if one was specified, and also NOT to

1941

2606

bind to an address or port if they were not specified."""

2607

global SO_BINDTODEVICE

1942

2608

if self.interface is not None:

1943

2609

if SO_BINDTODEVICE is None:

1944

logger.error("SO_BINDTODEVICE does not exist;"

1945

" cannot bind to interface %s",

1946

self.interface)

1947

else:

1948

try:

1949

self.socket.setsockopt(socket.SOL_SOCKET,

1950

SO_BINDTODEVICE,

1951

str(self.interface + '\0'))

1952

except socket.error as error:

1953

if error.errno == errno.EPERM:

1954

logger.error("No permission to bind to"

1955

" interface %s", self.interface)

1956

elif error.errno == errno.ENOPROTOOPT:

1957

logger.error("SO_BINDTODEVICE not available;"

1958

" cannot bind to interface %s",

1959

self.interface)

1960

elif error.errno == errno.ENODEV:

1961

logger.error("Interface %s does not exist,"

1962

" cannot bind", self.interface)

1963

else:

1964

raise

2610

# Fall back to a hard-coded value which seems to be

2611

# common enough.

2612

logger.warning("SO_BINDTODEVICE not found, trying 25")

2613

SO_BINDTODEVICE = 25

2614

try:

2615

self.socket.setsockopt(

2616

socket.SOL_SOCKET, SO_BINDTODEVICE,

2617

(self.interface + "\0").encode("utf-8"))

2618

except socket.error as error:

2619

if error.errno == errno.EPERM:

2620

logger.error("No permission to bind to"

2621

" interface %s", self.interface)

2622

elif error.errno == errno.ENOPROTOOPT:

2623

logger.error("SO_BINDTODEVICE not available;"

2624

" cannot bind to interface %s",

2625

self.interface)

2626

elif error.errno == errno.ENODEV:

2627

logger.error("Interface %s does not exist,"

2628

" cannot bind", self.interface)

2629

else:

2630

raise

1965

2631

# Only bind(2) the socket if we really need to.

1966

2632

if self.server_address[0] or self.server_address[1]:

2633

if self.server_address[1]:

2634

self.allow_reuse_address = True

1967

2635

if not self.server_address[0]:

1968

2636

if self.address_family == socket.AF_INET6:

1969

any_address = "::" # in6addr_any

2637

any_address = "::" # in6addr_any

1970

2638

else:

1971

any_address = socket.INADDR_ANY

2639

any_address = "0.0.0.0" # INADDR_ANY

1972

2640

self.server_address = (any_address,

1973

2641

self.server_address[1])

1974

2642

elif not self.server_address[1]:

1975

self.server_address = (self.server_address[0],

1976

0)

2643

self.server_address = (self.server_address[0], 0)

1977

2644

# if self.interface:

1978

2645

# self.server_address = (self.server_address[0],

1979

2646

# 0, # port

1985

2652

1986

2653

class MandosServer(IPv6_TCPServer):

1987

2654

"""Mandos server.

1988

2655

1989

2656

Attributes:

1990

2657

clients: set of Client objects

1991

2658

gnutls_priority GnuTLS priority string

1992

2659

use_dbus: Boolean; to emit D-Bus signals or not

1993

1994

Assumes a gobject.MainLoop event loop.

2660

2661

Assumes a GLib.MainLoop event loop.

1995

2662

"""

2663

1996

2664

def __init__(self, server_address, RequestHandlerClass,

1997

interface=None, use_ipv6=True, clients=None,

1998

gnutls_priority=None, use_dbus=True, socketfd=None):

2665

interface=None,

2666

use_ipv6=True,

2667

clients=None,

2668

gnutls_priority=None,

2669

use_dbus=True,

2670

socketfd=None):

1999

2671

self.enabled = False

2000

2672

self.clients = clients

2001

2673

if self.clients is None:

2004

2676

self.gnutls_priority = gnutls_priority

2005

2677

IPv6_TCPServer.__init__(self, server_address,

2006

2678

RequestHandlerClass,

2007

interface = interface,

2008

use_ipv6 = use_ipv6,

2009

socketfd = socketfd)

2679

interface=interface,

2680

use_ipv6=use_ipv6,

2681

socketfd=socketfd)

2682

2010

2683

def server_activate(self):

2011

2684

if self.enabled:

2012

2685

return socketserver.TCPServer.server_activate(self)

2013

2686

2014

2687

def enable(self):

2015

2688

self.enabled = True

2016

2689

2017

2690

def add_pipe(self, parent_pipe, proc):

2018

2691

# Call "handle_ipc" for both data and EOF events

2019

gobject.io_add_watch(parent_pipe.fileno(),

2020

gobject.IO_IN | gobject.IO_HUP,

2021

functools.partial(self.handle_ipc,

2022

parent_pipe =

2023

parent_pipe,

2024

proc = proc))

2025

2026

def handle_ipc(self, source, condition, parent_pipe=None,

2027

proc = None, client_object=None):

2692

GLib.io_add_watch(

2693

GLib.IOChannel.unix_new(parent_pipe.fileno()),

2694

GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,

2695

functools.partial(self.handle_ipc,

2696

parent_pipe=parent_pipe,

2697

proc=proc))

2698

2699

def handle_ipc(self, source, condition,

2700

parent_pipe=None,

2701

proc=None,

2702

client_object=None):

2028

2703

# error, or the other end of multiprocessing.Pipe has closed

2029

if condition & (gobject.IO_ERR | gobject.IO_HUP):

2704

if condition & (GLib.IO_ERR | GLib.IO_HUP):

2030

2705

# Wait for other process to exit

2031

2706

proc.join()

2032

2707

return False

2033

2708

2034

2709

# Read a request from the child

2035

2710

request = parent_pipe.recv()

2036

2711

command = request[0]

2037

2712

2038

2713

if command == 'init':

2039

fpr = request[1]

2040

address = request[2]

2041

2042

for c in self.clients.itervalues():

2043

if c.fingerprint == fpr:

2714

key_id = request[1].decode("ascii")

2715

fpr = request[2].decode("ascii")

2716

address = request[3]

2717

2718

for c in self.clients.values():

2719

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2720

continue

2721

if key_id and c.key_id == key_id:

2722

client = c

2723

break

2724

if fpr and c.fingerprint == fpr:

2044

2725

client = c

2045

2726

break

2046

2727

else:

2047

logger.info("Client not found for fingerprint: %s, ad"

2048

"dress: %s", fpr, address)

2728

logger.info("Client not found for key ID: %s, address"

2729

": %s", key_id or fpr, address)

2049

2730

if self.use_dbus:

2050

2731

# Emit D-Bus signal

2051

mandos_dbus_service.ClientNotFound(fpr,

2732

mandos_dbus_service.ClientNotFound(key_id or fpr,

2052

2733

address[0])

2053

2734

parent_pipe.send(False)

2054

2735

return False

2055

2056

gobject.io_add_watch(parent_pipe.fileno(),

2057

gobject.IO_IN | gobject.IO_HUP,

2058

functools.partial(self.handle_ipc,

2059

parent_pipe =

2060

parent_pipe,

2061

proc = proc,

2062

client_object =

2063

client))

2736

2737

GLib.io_add_watch(

2738

GLib.IOChannel.unix_new(parent_pipe.fileno()),

2739

GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,

2740

functools.partial(self.handle_ipc,

2741

parent_pipe=parent_pipe,

2742

proc=proc,

2743

client_object=client))

2064

2744

parent_pipe.send(True)

2065

2745

# remove the old hook in favor of the new above hook on

2066

2746

# same fileno

2069

2749

funcname = request[1]

2070

2750

args = request[2]

2071

2751

kwargs = request[3]

2072

2752

2073

2753

parent_pipe.send(('data', getattr(client_object,

2074

2754

funcname)(*args,

2075

**kwargs)))

2076

2755

**kwargs)))

2756

2077

2757

if command == 'getattr':

2078

2758

attrname = request[1]

2079

if callable(client_object.__getattribute__(attrname)):

2080

parent_pipe.send(('function',))

2759

if isinstance(client_object.__getattribute__(attrname),

2760

collections.abc.Callable):

2761

parent_pipe.send(('function', ))

2081

2762

else:

2082

parent_pipe.send(('data', client_object

2083

.__getattribute__(attrname)))

2084

2763

parent_pipe.send((

2764

'data', client_object.__getattribute__(attrname)))

2765

2085

2766

if command == 'setattr':

2086

2767

attrname = request[1]

2087

2768

value = request[2]

2088

2769

setattr(client_object, attrname, value)

2089

2770

2090

2771

return True

2091

2772

2092

2773

2774

def rfc3339_duration_to_delta(duration):

2775

"""Parse an RFC 3339 "duration" and return a datetime.timedelta

2776

2777

>>> rfc3339_duration_to_delta("P7D") == datetime.timedelta(7)

2778

True

2779

>>> rfc3339_duration_to_delta("PT60S") == datetime.timedelta(0, 60)

2780

True

2781

>>> rfc3339_duration_to_delta("PT60M") == datetime.timedelta(0, 3600)

2782

True

2783

>>> rfc3339_duration_to_delta("PT24H") == datetime.timedelta(1)

2784

True

2785

>>> rfc3339_duration_to_delta("P1W") == datetime.timedelta(7)

2786

True

2787

>>> rfc3339_duration_to_delta("PT5M30S") == datetime.timedelta(0, 330)

2788

True

2789

>>> rfc3339_duration_to_delta("P1DT3M20S") == datetime.timedelta(1, 200)

2790

True

2791

"""

2792

2793

# Parsing an RFC 3339 duration with regular expressions is not

2794

# possible - there would have to be multiple places for the same

2795

# values, like seconds. The current code, while more esoteric, is

2796

# cleaner without depending on a parsing library. If Python had a

2797

# built-in library for parsing we would use it, but we'd like to

2798

# avoid excessive use of external libraries.

2799

2800

# New type for defining tokens, syntax, and semantics all-in-one

2801

Token = collections.namedtuple("Token", (

2802

"regexp", # To match token; if "value" is not None, must have

2803

# a "group" containing digits

2804

"value", # datetime.timedelta or None

2805

"followers")) # Tokens valid after this token

2806

# RFC 3339 "duration" tokens, syntax, and semantics; taken from

2807

# the "duration" ABNF definition in RFC 3339, Appendix A.

2808

token_end = Token(re.compile(r"$"), None, frozenset())

2809

token_second = Token(re.compile(r"(\d+)S"),

2810

datetime.timedelta(seconds=1),

2811

frozenset((token_end, )))

2812

token_minute = Token(re.compile(r"(\d+)M"),

2813

datetime.timedelta(minutes=1),

2814

frozenset((token_second, token_end)))

2815

token_hour = Token(re.compile(r"(\d+)H"),

2816

datetime.timedelta(hours=1),

2817

frozenset((token_minute, token_end)))

2818

token_time = Token(re.compile(r"T"),

2819

None,

2820

frozenset((token_hour, token_minute,

2821

token_second)))

2822

token_day = Token(re.compile(r"(\d+)D"),

2823

datetime.timedelta(days=1),

2824

frozenset((token_time, token_end)))

2825

token_month = Token(re.compile(r"(\d+)M"),

2826

datetime.timedelta(weeks=4),

2827

frozenset((token_day, token_end)))

2828

token_year = Token(re.compile(r"(\d+)Y"),

2829

datetime.timedelta(weeks=52),

2830

frozenset((token_month, token_end)))

2831

token_week = Token(re.compile(r"(\d+)W"),

2832

datetime.timedelta(weeks=1),

2833

frozenset((token_end, )))

2834

token_duration = Token(re.compile(r"P"), None,

2835

frozenset((token_year, token_month,

2836

token_day, token_time,

2837

token_week)))

2838

# Define starting values:

2839

# Value so far

2840

value = datetime.timedelta()

2841

found_token = None

2842

# Following valid tokens

2843

followers = frozenset((token_duration, ))

2844

# String left to parse

2845

s = duration

2846

# Loop until end token is found

2847

while found_token is not token_end:

2848

# Search for any currently valid tokens

2849

for token in followers:

2850

match = token.regexp.match(s)

2851

if match is not None:

2852

# Token found

2853

if token.value is not None:

2854

# Value found, parse digits

2855

factor = int(match.group(1), 10)

2856

# Add to value so far

2857

value += factor * token.value

2858

# Strip token from string

2859

s = token.regexp.sub("", s, 1)

2860

# Go to found token

2861

found_token = token

2862

# Set valid next tokens

2863

followers = found_token.followers

2864

break

2865

else:

2866

# No currently valid tokens were found

2867

raise ValueError("Invalid RFC 3339 duration: {!r}"

2868

.format(duration))

2869

# End token found

2870

return value

2871

2872

2093

2873

def string_to_delta(interval):

2094

2874

"""Parse a string and return a datetime.timedelta

2095

2096

>>> string_to_delta('7d')

2097

datetime.timedelta(7)

2098

>>> string_to_delta('60s')

2099

datetime.timedelta(0, 60)

2100

>>> string_to_delta('60m')

2101

datetime.timedelta(0, 3600)

2102

>>> string_to_delta('24h')

2103

datetime.timedelta(1)

2104

>>> string_to_delta('1w')

2105

datetime.timedelta(7)

2106

>>> string_to_delta('5m 30s')

2107

datetime.timedelta(0, 330)

2875

2876

>>> string_to_delta('7d') == datetime.timedelta(7)

2877

True

2878

>>> string_to_delta('60s') == datetime.timedelta(0, 60)

2879

True

2880

>>> string_to_delta('60m') == datetime.timedelta(0, 3600)

2881

True

2882

>>> string_to_delta('24h') == datetime.timedelta(1)

2883

True

2884

>>> string_to_delta('1w') == datetime.timedelta(7)

2885

True

2886

>>> string_to_delta('5m 30s') == datetime.timedelta(0, 330)

2887

True

2108

2888

"""

2889

2890

try:

2891

return rfc3339_duration_to_delta(interval)

2892

except ValueError:

2893

pass

2894

2109

2895

timevalue = datetime.timedelta(0)

2110

2896

for s in interval.split():

2111

2897

try:

2112

suffix = unicode(s[-1])

2898

suffix = s[-1]

2113

2899

value = int(s[:-1])

2114

2900

if suffix == "d":

2115

2901

delta = datetime.timedelta(value)

2122

2908

elif suffix == "w":

2123

2909

delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)

2124

2910

else:

2125

raise ValueError("Unknown suffix {0!r}"

2126

.format(suffix))

2127

except (ValueError, IndexError) as e:

2911

raise ValueError("Unknown suffix {!r}".format(suffix))

2912

except IndexError as e:

2128

2913

raise ValueError(*(e.args))

2129

2914

timevalue += delta

2130

2915

return timevalue

2131

2916

2132

2917

2133

def daemon(nochdir = False, noclose = False):

2918

def daemon(nochdir=False, noclose=False):

2134

2919

"""See daemon(3). Standard BSD Unix function.

2135

2920

2136

2921

This should really exist as os.daemon, but it doesn't (yet)."""

2137

2922

if os.fork():

2138

2923

sys.exit()

2146

2931

null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)

2147

2932

if not stat.S_ISCHR(os.fstat(null).st_mode):

2148

2933

raise OSError(errno.ENODEV,

2149

"{0} not a character device"

2934

"{} not a character device"

2150

2935

.format(os.devnull))

2151

2936

os.dup2(null, sys.stdin.fileno())

2152

2937

os.dup2(null, sys.stdout.fileno())

2156

2941

2157

2942

2158

2943

def main():

2159

2944

2160

2945

##################################################################

2161

2946

# Parsing of options, both command line and config file

2162

2947

2163

2948

parser = argparse.ArgumentParser()

2164

2949

parser.add_argument("-v", "--version", action="version",

2165

version = "%(prog)s {0}".format(version),

2950

version="%(prog)s {}".format(version),

2166

2951

help="show version number and exit")

2167

2952

parser.add_argument("-i", "--interface", metavar="IF",

2168

2953

help="Bind to interface IF")

2174

2959

help="Run self-test")

2175

2960

parser.add_argument("--debug", action="store_true",

2176

2961

help="Debug mode; run in foreground and log"

2177

" to terminal")

2962

" to terminal", default=None)

2178

2963

parser.add_argument("--debuglevel", metavar="LEVEL",

2179

2964

help="Debug level for stdout output")

2180

2965

parser.add_argument("--priority", help="GnuTLS"

2187

2972

" files")

2188

2973

parser.add_argument("--no-dbus", action="store_false",

2189

2974

dest="use_dbus", help="Do not provide D-Bus"

2190

" system bus interface")

2975

" system bus interface", default=None)

2191

2976

parser.add_argument("--no-ipv6", action="store_false",

2192

dest="use_ipv6", help="Do not use IPv6")

2977

dest="use_ipv6", help="Do not use IPv6",

2978

default=None)

2193

2979

parser.add_argument("--no-restore", action="store_false",

2194

2980

dest="restore", help="Do not restore stored"

2195

" state")

2981

" state", default=None)

2196

2982

parser.add_argument("--socket", type=int,

2197

2983

help="Specify a file descriptor to a network"

2198

2984

" socket to use instead of creating one")

2199

2985

parser.add_argument("--statedir", metavar="DIR",

2200

2986

help="Directory to save/restore state in")

2201

2987

parser.add_argument("--foreground", action="store_true",

2202

help="Run in foreground")

2203

2988

help="Run in foreground", default=None)

2989

parser.add_argument("--no-zeroconf", action="store_false",

2990

dest="zeroconf", help="Do not use Zeroconf",

2991

default=None)

2992

2204

2993

options = parser.parse_args()

2205

2206

if options.check:

2207

import doctest

2208

doctest.testmod()

2209

sys.exit()

2210

2994

2211

2995

# Default values for config file for server-global settings

2212

server_defaults = { "interface": "",

2213

"address": "",

2214

"port": "",

2215

"debug": "False",

2216

"priority":

2217

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",

2218

"servicename": "Mandos",

2219

"use_dbus": "True",

2220

"use_ipv6": "True",

2221

"debuglevel": "",

2222

"restore": "True",

2223

"socket": "",

2224

"statedir": "/var/lib/mandos",

2225

"foreground": "False",

2226

}

2227

2996

if gnutls.has_rawpk:

2997

priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"

2998

":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")

2999

else:

3000

priority = ("SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:!RSA"

3001

":+SIGN-DSA-SHA256")

3002

server_defaults = {"interface": "",

3003

"address": "",

3004

"port": "",

3005

"debug": "False",

3006

"priority": priority,

3007

"servicename": "Mandos",

3008

"use_dbus": "True",

3009

"use_ipv6": "True",

3010

"debuglevel": "",

3011

"restore": "True",

3012

"socket": "",

3013

"statedir": "/var/lib/mandos",

3014

"foreground": "False",

3015

"zeroconf": "True",

3016

}

3017

del priority

3018

2228

3019

# Parse config file for server-global settings

2229

server_config = configparser.SafeConfigParser(server_defaults)

3020

server_config = configparser.ConfigParser(server_defaults)

2230

3021

del server_defaults

2231

server_config.read(os.path.join(options.configdir,

2232

"mandos.conf"))

2233

# Convert the SafeConfigParser object to a dict

3022

server_config.read(os.path.join(options.configdir, "mandos.conf"))

3023

# Convert the ConfigParser object to a dict

2234

3024

server_settings = server_config.defaults()

2235

3025

# Use the appropriate methods on the non-string config options

2236

for option in ("debug", "use_dbus", "use_ipv6", "foreground"):

3026

for option in ("debug", "use_dbus", "use_ipv6", "restore",

3027

"foreground", "zeroconf"):

2237

3028

server_settings[option] = server_config.getboolean("DEFAULT",

2238

3029

option)

2239

3030

if server_settings["port"]:

2249

3040

server_settings["socket"] = os.dup(server_settings

2250

3041

["socket"])

2251

3042

del server_config

2252

3043

2253

3044

# Override the settings from the config file with command line

2254

3045

# options, if set.

2255

3046

for option in ("interface", "address", "port", "debug",

2256

"priority", "servicename", "configdir",

2257

"use_dbus", "use_ipv6", "debuglevel", "restore",

2258

"statedir", "socket", "foreground"):

3047

"priority", "servicename", "configdir", "use_dbus",

3048

"use_ipv6", "debuglevel", "restore", "statedir",

3049

"socket", "foreground", "zeroconf"):

2259

3050

value = getattr(options, option)

2260

3051

if value is not None:

2261

3052

server_settings[option] = value

2262

3053

del options

2263

3054

# Force all strings to be unicode

2264

3055

for option in server_settings.keys():

2265

if type(server_settings[option]) is str:

2266

server_settings[option] = unicode(server_settings[option])

3056

if isinstance(server_settings[option], bytes):

3057

server_settings[option] = (server_settings[option]

3058

.decode("utf-8"))

3059

# Force all boolean options to be boolean

3060

for option in ("debug", "use_dbus", "use_ipv6", "restore",

3061

"foreground", "zeroconf"):

3062

server_settings[option] = bool(server_settings[option])

2267

3063

# Debug implies foreground

2268

3064

if server_settings["debug"]:

2269

3065

server_settings["foreground"] = True

2270

3066

# Now we have our good server settings in "server_settings"

2271

3067

2272

3068

##################################################################

2273

3069

3070

if (not server_settings["zeroconf"]

3071

and not (server_settings["port"]

3072

or server_settings["socket"] != "")):

3073

parser.error("Needs port or socket to work without Zeroconf")

3074

2274

3075

# For convenience

2275

3076

debug = server_settings["debug"]

2276

3077

debuglevel = server_settings["debuglevel"]

2279

3080

stored_state_path = os.path.join(server_settings["statedir"],

2280

3081

stored_state_file)

2281

3082

foreground = server_settings["foreground"]

2282

3083

zeroconf = server_settings["zeroconf"]

3084

2283

3085

if debug:

2284

3086

initlogger(debug, logging.DEBUG)

2285

3087

else:

2288

3090

else:

2289

3091

level = getattr(logging, debuglevel.upper())

2290

3092

initlogger(debug, level)

2291

3093

2292

3094

if server_settings["servicename"] != "Mandos":

2293

syslogger.setFormatter(logging.Formatter

2294

('Mandos ({0}) [%(process)d]:'

2295

' %(levelname)s: %(message)s'

2296

.format(server_settings

2297

["servicename"])))

2298

3095

syslogger.setFormatter(

3096

logging.Formatter('Mandos ({}) [%(process)d]:'

3097

' %(levelname)s: %(message)s'.format(

3098

server_settings["servicename"])))

3099

2299

3100

# Parse config file with clients

2300

client_config = configparser.SafeConfigParser(Client

2301

.client_defaults)

3101

client_config = configparser.ConfigParser(Client.client_defaults)

2302

3102

client_config.read(os.path.join(server_settings["configdir"],

2303

3103

"clients.conf"))

2304

3104

2305

3105

global mandos_dbus_service

2306

3106

mandos_dbus_service = None

2307

2308

tcp_server = MandosServer((server_settings["address"],

2309

server_settings["port"]),

2310

ClientHandler,

2311

interface=(server_settings["interface"]

2312

or None),

2313

use_ipv6=use_ipv6,

2314

gnutls_priority=

2315

server_settings["priority"],

2316

use_dbus=use_dbus,

2317

socketfd=(server_settings["socket"]

2318

or None))

3107

3108

socketfd = None

3109

if server_settings["socket"] != "":

3110

socketfd = server_settings["socket"]

3111

tcp_server = MandosServer(

3112

(server_settings["address"], server_settings["port"]),

3113

ClientHandler,

3114

interface=(server_settings["interface"] or None),

3115

use_ipv6=use_ipv6,

3116

gnutls_priority=server_settings["priority"],

3117

use_dbus=use_dbus,

3118

socketfd=socketfd)

2319

3119

if not foreground:

2320

pidfilename = "/var/run/mandos.pid"

3120

pidfilename = "/run/mandos.pid"

3121

if not os.path.isdir("/run/."):

3122

pidfilename = "/var/run/mandos.pid"

2321

3123

pidfile = None

2322

3124

try:

2323

pidfile = open(pidfilename, "w")

3125

pidfile = codecs.open(pidfilename, "w", encoding="utf-8")

2324

3126

except IOError as e:

2325

3127

logger.error("Could not open file %r", pidfilename,

2326

3128

exc_info=e)

2327

2328

for name in ("_mandos", "mandos", "nobody"):

3129

3130

for name, group in (("_mandos", "_mandos"),

3131

("mandos", "mandos"),

3132

("nobody", "nogroup")):

2329

3133

try:

2330

3134

uid = pwd.getpwnam(name).pw_uid

2331

gid = pwd.getpwnam(name).pw_gid

3135

gid = pwd.getpwnam(group).pw_gid

2332

3136

break

2333

3137

except KeyError:

2334

3138

continue

2338

3142

try:

2339

3143

os.setgid(gid)

2340

3144

os.setuid(uid)

3145

if debug:

3146

logger.debug("Did setuid/setgid to {}:{}".format(uid,

3147

gid))

2341

3148

except OSError as error:

3149

logger.warning("Failed to setuid/setgid to {}:{}: {}"

3150

.format(uid, gid, os.strerror(error.errno)))

2342

3151

if error.errno != errno.EPERM:

2343

raise error

2344

3152

raise

3153

2345

3154

if debug:

2346

3155

# Enable all possible GnuTLS debugging

2347

3156

2348

3157

# "Use a log level over 10 to enable all debugging options."

2349

3158

# - GnuTLS manual

2350

gnutls.library.functions.gnutls_global_set_log_level(11)

2351

2352

@gnutls.library.types.gnutls_log_func

3159

gnutls.global_set_log_level(11)

3160

3161

@gnutls.log_func

2353

3162

def debug_gnutls(level, string):

2354

3163

logger.debug("GnuTLS: %s", string[:-1])

2355

2356

(gnutls.library.functions

2357

.gnutls_global_set_log_function(debug_gnutls))

2358

3164

3165

gnutls.global_set_log_function(debug_gnutls)

3166

2359

3167

# Redirect stdin so all checkers get /dev/null

2360

3168

null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)

2361

3169

os.dup2(null, sys.stdin.fileno())

2362

3170

if null > 2:

2363

3171

os.close(null)

2364

3172

2365

3173

# Need to fork before connecting to D-Bus

2366

3174

if not foreground:

2367

3175

# Close all input and output, do double fork, etc.

2368

3176

daemon()

2369

2370

# multiprocessing will use threads, so before we use gobject we

2371

# need to inform gobject that threads will be used.

2372

gobject.threads_init()

2373

3177

3178

if gi.version_info < (3, 10, 2):

3179

# multiprocessing will use threads, so before we use GLib we

3180

# need to inform GLib that threads will be used.

3181

GLib.threads_init()

3182

2374

3183

global main_loop

2375

3184

# From the Avahi example code

2376

3185

DBusGMainLoop(set_as_default=True)

2377

main_loop = gobject.MainLoop()

3186

main_loop = GLib.MainLoop()

2378

3187

bus = dbus.SystemBus()

2379

3188

# End of Avahi example code

2380

3189

if use_dbus:

2381

3190

try:

2382

3191

bus_name = dbus.service.BusName("se.recompile.Mandos",

2383

bus, do_not_queue=True)

2384

old_bus_name = (dbus.service.BusName

2385

("se.bsnet.fukt.Mandos", bus,

2386

do_not_queue=True))

2387

except dbus.exceptions.NameExistsException as e:

3192

bus,

3193

do_not_queue=True)

3194

old_bus_name = dbus.service.BusName(

3195

"se.bsnet.fukt.Mandos", bus,

3196

do_not_queue=True)

3197

except dbus.exceptions.DBusException as e:

2388

3198

logger.error("Disabling D-Bus:", exc_info=e)

2389

3199

use_dbus = False

2390

3200

server_settings["use_dbus"] = False

2391

3201

tcp_server.use_dbus = False

2392

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2393

service = AvahiServiceToSyslog(name =

2394

server_settings["servicename"],

2395

servicetype = "_mandos._tcp",

2396

protocol = protocol, bus = bus)

2397

if server_settings["interface"]:

2398

service.interface = (if_nametoindex

2399

(str(server_settings["interface"])))

2400

3202

if zeroconf:

3203

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3204

service = AvahiServiceToSyslog(

3205

name=server_settings["servicename"],

3206

servicetype="_mandos._tcp",

3207

protocol=protocol,

3208

bus=bus)

3209

if server_settings["interface"]:

3210

service.interface = if_nametoindex(

3211

server_settings["interface"].encode("utf-8"))

3212

2401

3213

global multiprocessing_manager

2402

3214

multiprocessing_manager = multiprocessing.Manager()

2403

3215

2404

3216

client_class = Client

2405

3217

if use_dbus:

2406

client_class = functools.partial(ClientDBus, bus = bus)

2407

3218

client_class = functools.partial(ClientDBus, bus=bus)

3219

2408

3220

client_settings = Client.config_parser(client_config)

2409

3221

old_client_settings = {}

2410

3222

clients_data = {}

2411

3223

3224

# This is used to redirect stdout and stderr for checker processes

3225

global wnull

3226

wnull = open(os.devnull, "w") # A writable /dev/null

3227

# Only used if server is running in foreground but not in debug

3228

# mode

3229

if debug or not foreground:

3230

wnull.close()

3231

2412

3232

# Get client data and settings from last running state.

2413

3233

if server_settings["restore"]:

2414

3234

try:

2415

3235

with open(stored_state_path, "rb") as stored_state:

2416

clients_data, old_client_settings = (pickle.load

2417

(stored_state))

3236

if sys.version_info.major == 2:

3237

clients_data, old_client_settings = pickle.load(

3238

stored_state)

3239

else:

3240

bytes_clients_data, bytes_old_client_settings = (

3241

pickle.load(stored_state, encoding="bytes"))

3242

# Fix bytes to strings

3243

# clients_data

3244

# .keys()

3245

clients_data = {(key.decode("utf-8")

3246

if isinstance(key, bytes)

3247

else key): value

3248

for key, value in

3249

bytes_clients_data.items()}

3250

del bytes_clients_data

3251

for key in clients_data:

3252

value = {(k.decode("utf-8")

3253

if isinstance(k, bytes) else k): v

3254

for k, v in

3255

clients_data[key].items()}

3256

clients_data[key] = value

3257

# .client_structure

3258

value["client_structure"] = [

3259

(s.decode("utf-8")

3260

if isinstance(s, bytes)

3261

else s) for s in

3262

value["client_structure"]]

3263

# .name, .host, and .checker_command

3264

for k in ("name", "host", "checker_command"):

3265

if isinstance(value[k], bytes):

3266

value[k] = value[k].decode("utf-8")

3267

if "key_id" not in value:

3268

value["key_id"] = ""

3269

elif "fingerprint" not in value:

3270

value["fingerprint"] = ""

3271

# old_client_settings

3272

# .keys()

3273

old_client_settings = {

3274

(key.decode("utf-8")

3275

if isinstance(key, bytes)

3276

else key): value

3277

for key, value in

3278

bytes_old_client_settings.items()}

3279

del bytes_old_client_settings

3280

# .host and .checker_command

3281

for value in old_client_settings.values():

3282

for attribute in ("host", "checker_command"):

3283

if isinstance(value[attribute], bytes):

3284

value[attribute] = (value[attribute]

3285

.decode("utf-8"))

2418

3286

os.remove(stored_state_path)

2419

3287

except IOError as e:

2420

3288

if e.errno == errno.ENOENT:

2421

logger.warning("Could not load persistent state: {0}"

2422

.format(os.strerror(e.errno)))

3289

logger.warning("Could not load persistent state:"

3290

" {}".format(os.strerror(e.errno)))

2423

3291

else:

2424

3292

logger.critical("Could not load persistent state:",

2425

3293

exc_info=e)

2426

3294

raise

2427

3295

except EOFError as e:

2428

3296

logger.warning("Could not load persistent state: "

2429

"EOFError:", exc_info=e)

2430

3297

"EOFError:",

3298

exc_info=e)

3299

2431

3300

with PGPEngine() as pgp:

2432

for client_name, client in clients_data.iteritems():

3301

for client_name, client in clients_data.items():

3302

# Skip removed clients

3303

if client_name not in client_settings:

3304

continue

3305

2433

3306

# Decide which value to use after restoring saved state.

2434

3307

# We have three different values: Old config file,

2435

3308

# new config file, and saved state.

2440

3313

# For each value in new config, check if it

2441

3314

# differs from the old config value (Except for

2442

3315

# the "secret" attribute)

2443

if (name != "secret" and

2444

value != old_client_settings[client_name]

2445

[name]):

3316

if (name != "secret"

3317

and (value !=

3318

old_client_settings[client_name][name])):

2446

3319

client[name] = value

2447

3320

except KeyError:

2448

3321

pass

2449

3322

2450

3323

# Clients who has passed its expire date can still be

2451

# enabled if its last checker was successful. Clients

3324

# enabled if its last checker was successful. A Client

2452

3325

# whose checker succeeded before we stored its state is

2453

3326

# assumed to have successfully run all checkers during

2454

3327

# downtime.

2456

3329

if datetime.datetime.utcnow() >= client["expires"]:

2457

3330

if not client["last_checked_ok"]:

2458

3331

logger.warning(

2459

"disabling client {0} - Client never "

2460

"performed a successful checker"

2461

.format(client_name))

3332

"disabling client {} - Client never "

3333

"performed a successful checker".format(

3334

client_name))

2462

3335

client["enabled"] = False

2463

3336

elif client["last_checker_status"] != 0:

2464

3337

logger.warning(

2465

"disabling client {0} - Client "

2466

"last checker failed with error code {1}"

2467

.format(client_name,

2468

client["last_checker_status"]))

3338

"disabling client {} - Client last"

3339

" checker failed with error code"

3340

" {}".format(

3341

client_name,

3342

client["last_checker_status"]))

2469

3343

client["enabled"] = False

2470

3344

else:

2471

client["expires"] = (datetime.datetime

2472

.utcnow()

2473

+ client["timeout"])

3345

client["expires"] = (

3346

datetime.datetime.utcnow()

3347

+ client["timeout"])

2474

3348

logger.debug("Last checker succeeded,"

2475

" keeping {0} enabled"

2476

.format(client_name))

3349

" keeping {} enabled".format(

3350

client_name))

2477

3351

try:

2478

client["secret"] = (

2479

pgp.decrypt(client["encrypted_secret"],

2480

client_settings[client_name]

2481

["secret"]))

3352

client["secret"] = pgp.decrypt(

3353

client["encrypted_secret"],

3354

client_settings[client_name]["secret"])

2482

3355

except PGPError:

2483

3356

# If decryption fails, we use secret from new settings

2484

logger.debug("Failed to decrypt {0} old secret"

2485

.format(client_name))

2486

client["secret"] = (

2487

client_settings[client_name]["secret"])

2488

3357

logger.debug("Failed to decrypt {} old secret".format(

3358

client_name))

3359

client["secret"] = (client_settings[client_name]

3360

["secret"])

3361

2489

3362

# Add/remove clients based on new changes made to config

2490

3363

for client_name in (set(old_client_settings)

2491

3364

- set(client_settings)):

2493

3366

for client_name in (set(client_settings)

2494

3367

- set(old_client_settings)):

2495

3368

clients_data[client_name] = client_settings[client_name]

2496

3369

2497

3370

# Create all client objects

2498

for client_name, client in clients_data.iteritems():

3371

for client_name, client in clients_data.items():

2499

3372

tcp_server.clients[client_name] = client_class(

2500

name = client_name, settings = client)

2501

3373

name=client_name,

3374

settings=client,

3375

server_settings=server_settings)

3376

2502

3377

if not tcp_server.clients:

2503

3378

logger.warning("No clients defined")

2504

3379

2505

3380

if not foreground:

2506

3381

if pidfile is not None:

3382

pid = os.getpid()

2507

3383

try:

2508

3384

with pidfile:

2509

pid = os.getpid()

2510

pidfile.write(str(pid) + "\n".encode("utf-8"))

3385

print(pid, file=pidfile)

2511

3386

except IOError:

2512

3387

logger.error("Could not write to file %r with PID %d",

2513

3388

pidfilename, pid)

2514

3389

del pidfile

2515

3390

del pidfilename

2516

2517

signal.signal(signal.SIGHUP, lambda signum, frame: sys.exit())

2518

signal.signal(signal.SIGTERM, lambda signum, frame: sys.exit())

2519

3391

3392

for termsig in (signal.SIGHUP, signal.SIGTERM):

3393

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3394

lambda: main_loop.quit() and False)

3395

2520

3396

if use_dbus:

2521

@alternate_dbus_interfaces({"se.recompile.Mandos":

2522

"se.bsnet.fukt.Mandos"})

2523

class MandosDBusService(DBusObjectWithProperties):

3397

3398

@alternate_dbus_interfaces(

3399

{"se.recompile.Mandos": "se.bsnet.fukt.Mandos"})

3400

class MandosDBusService(DBusObjectWithObjectManager):

2524

3401

"""A D-Bus proxy object"""

3402

2525

3403

def __init__(self):

2526

3404

dbus.service.Object.__init__(self, bus, "/")

3405

2527

3406

_interface = "se.recompile.Mandos"

2528

2529

@dbus_interface_annotations(_interface)

2530

def _foo(self):

2531

return { "org.freedesktop.DBus.Property"

2532

".EmitsChangedSignal":

2533

"false"}

2534

3407

2535

3408

@dbus.service.signal(_interface, signature="o")

2536

3409

def ClientAdded(self, objpath):

2537

3410

"D-Bus signal"

2538

3411

pass

2539

3412

2540

3413

@dbus.service.signal(_interface, signature="ss")

2541

def ClientNotFound(self, fingerprint, address):

3414

def ClientNotFound(self, key_id, address):

2542

3415

"D-Bus signal"

2543

3416

pass

2544

3417

3418

@dbus_annotations({"org.freedesktop.DBus.Deprecated":

3419

"true"})

2545

3420

@dbus.service.signal(_interface, signature="os")

2546

3421

def ClientRemoved(self, objpath, name):

2547

3422

"D-Bus signal"

2548

3423

pass

2549

3424

3425

@dbus_annotations({"org.freedesktop.DBus.Deprecated":

3426

"true"})

2550

3427

@dbus.service.method(_interface, out_signature="ao")

2551

3428

def GetAllClients(self):

2552

3429

"D-Bus method"

2553

return dbus.Array(c.dbus_object_path

2554

for c in

2555

tcp_server.clients.itervalues())

2556

3430

return dbus.Array(c.dbus_object_path for c in

3431

tcp_server.clients.values())

3432

3433

@dbus_annotations({"org.freedesktop.DBus.Deprecated":

3434

"true"})

2557

3435

@dbus.service.method(_interface,

2558

3436

out_signature="a{oa{sv}}")

2559

3437

def GetAllClientsWithProperties(self):

2560

3438

"D-Bus method"

2561

3439

return dbus.Dictionary(

2562

((c.dbus_object_path, c.GetAll(""))

2563

for c in tcp_server.clients.itervalues()),

3440

{c.dbus_object_path: c.GetAll(

3441

"se.recompile.Mandos.Client")

3442

for c in tcp_server.clients.values()},

2564

3443

signature="oa{sv}")

2565

3444

2566

3445

@dbus.service.method(_interface, in_signature="o")

2567

3446

def RemoveClient(self, object_path):

2568

3447

"D-Bus method"

2569

for c in tcp_server.clients.itervalues():

3448

for c in tcp_server.clients.values():

2570

3449

if c.dbus_object_path == object_path:

2571

3450

del tcp_server.clients[c.name]

2572

3451

c.remove_from_connection()

2573

# Don't signal anything except ClientRemoved

3452

# Don't signal the disabling

2574

3453

c.disable(quiet=True)

2575

# Emit D-Bus signal

2576

self.ClientRemoved(object_path, c.name)

3454

# Emit D-Bus signal for removal

3455

self.client_removed_signal(c)

2577

3456

return

2578

3457

raise KeyError(object_path)

2579

3458

2580

3459

del _interface

2581

3460

3461

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3462

out_signature="a{oa{sa{sv}}}")

3463

def GetManagedObjects(self):

3464

"""D-Bus method"""

3465

return dbus.Dictionary(

3466

{client.dbus_object_path:

3467

dbus.Dictionary(

3468

{interface: client.GetAll(interface)

3469

for interface in

3470

client._get_all_interface_names()})

3471

for client in tcp_server.clients.values()})

3472

3473

def client_added_signal(self, client):

3474

"""Send the new standard signal and the old signal"""

3475

if use_dbus:

3476

# New standard signal

3477

self.InterfacesAdded(

3478

client.dbus_object_path,

3479

dbus.Dictionary(

3480

{interface: client.GetAll(interface)

3481

for interface in

3482

client._get_all_interface_names()}))

3483

# Old signal

3484

self.ClientAdded(client.dbus_object_path)

3485

3486

def client_removed_signal(self, client):

3487

"""Send the new standard signal and the old signal"""

3488

if use_dbus:

3489

# New standard signal

3490

self.InterfacesRemoved(

3491

client.dbus_object_path,

3492

client._get_all_interface_names())

3493

# Old signal

3494

self.ClientRemoved(client.dbus_object_path,

3495

client.name)

3496

2582

3497

mandos_dbus_service = MandosDBusService()

2583

3498

3499

# Save modules to variables to exempt the modules from being

3500

# unloaded before the function registered with atexit() is run.

3501

mp = multiprocessing

3502

wn = wnull

3503

2584

3504

def cleanup():

2585

3505

"Cleanup function; run on exit"

2586

service.cleanup()

2587

2588

multiprocessing.active_children()

3506

if zeroconf:

3507

service.cleanup()

3508

3509

mp.active_children()

3510

wn.close()

2589

3511

if not (tcp_server.clients or client_settings):

2590

3512

return

2591

3513

2592

3514

# Store client before exiting. Secrets are encrypted with key

2593

3515

# based on what config file has. If config file is

2594

3516

# removed/edited, old secret will thus be unrecovable.

2595

3517

clients = {}

2596

3518

with PGPEngine() as pgp:

2597

for client in tcp_server.clients.itervalues():

3519

for client in tcp_server.clients.values():

2598

3520

key = client_settings[client.name]["secret"]

2599

3521

client.encrypted_secret = pgp.encrypt(client.secret,

2600

3522

key)

2601

3523

client_dict = {}

2602

3524

2603

3525

# A list of attributes that can not be pickled

2604

3526

# + secret.

2605

exclude = set(("bus", "changedstate", "secret",

2606

"checker"))

2607

for name, typ in (inspect.getmembers

2608

(dbus.service.Object)):

3527

exclude = {"bus", "changedstate", "secret",

3528

"checker", "server_settings"}

3529

for name, typ in inspect.getmembers(dbus.service

3530

.Object):

2609

3531

exclude.add(name)

2610

3532

2611

3533

client_dict["encrypted_secret"] = (client

2612

3534

.encrypted_secret)

2613

3535

for attr in client.client_structure:

2614

3536

if attr not in exclude:

2615

3537

client_dict[attr] = getattr(client, attr)

2616

3538

2617

3539

clients[client.name] = client_dict

2618

3540

del client_settings[client.name]["secret"]

2619

3541

2620

3542

try:

2621

with (tempfile.NamedTemporaryFile

2622

(mode='wb', suffix=".pickle", prefix='clients-',

2623

dir=os.path.dirname(stored_state_path),

2624

delete=False)) as stored_state:

2625

pickle.dump((clients, client_settings), stored_state)

2626

tempname=stored_state.name

3543

with tempfile.NamedTemporaryFile(

3544

mode='wb',

3545

suffix=".pickle",

3546

prefix='clients-',

3547

dir=os.path.dirname(stored_state_path),

3548

delete=False) as stored_state:

3549

pickle.dump((clients, client_settings), stored_state,

3550

protocol=2)

3551

tempname = stored_state.name

2627

3552

os.rename(tempname, stored_state_path)

2628

3553

except (IOError, OSError) as e:

2629

3554

if not debug:

2632

3557

except NameError:

2633

3558

pass

2634

3559

if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):

2635

logger.warning("Could not save persistent state: {0}"

3560

logger.warning("Could not save persistent state: {}"

2636

3561

.format(os.strerror(e.errno)))

2637

3562

else:

2638

3563

logger.warning("Could not save persistent state:",

2639

3564

exc_info=e)

2640

raise e

2641

3565

raise

3566

2642

3567

# Delete all clients, and settings from config

2643

3568

while tcp_server.clients:

2644

3569

name, client = tcp_server.clients.popitem()

2645

3570

if use_dbus:

2646

3571

client.remove_from_connection()

2647

# Don't signal anything except ClientRemoved

3572

# Don't signal the disabling

2648

3573

client.disable(quiet=True)

3574

# Emit D-Bus signal for removal

2649

3575

if use_dbus:

2650

# Emit D-Bus signal

2651

mandos_dbus_service.ClientRemoved(client

2652

.dbus_object_path,

2653

client.name)

3576

mandos_dbus_service.client_removed_signal(client)

2654

3577

client_settings.clear()

2655

3578

2656

3579

atexit.register(cleanup)

2657

2658

for client in tcp_server.clients.itervalues():

3580

3581

for client in tcp_server.clients.values():

2659

3582

if use_dbus:

2660

# Emit D-Bus signal

2661

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3583

# Emit D-Bus signal for adding

3584

mandos_dbus_service.client_added_signal(client)

2662

3585

# Need to initiate checking of clients

2663

3586

if client.enabled:

2664

3587

client.init_checker()

2665

3588

2666

3589

tcp_server.enable()

2667

3590

tcp_server.server_activate()

2668

3591

2669

3592

# Find out what port we got

2670

service.port = tcp_server.socket.getsockname()[1]

3593

if zeroconf:

3594

service.port = tcp_server.socket.getsockname()[1]

2671

3595

if use_ipv6:

2672

3596

logger.info("Now listening on address %r, port %d,"

2673

3597

" flowinfo %d, scope_id %d",

2675

3599

else: # IPv4

2676

3600

logger.info("Now listening on address %r, port %d",

2677

3601

*tcp_server.socket.getsockname())

2678

2679

#service.interface = tcp_server.socket.getsockname()[3]

2680

3602

3603

# service.interface = tcp_server.socket.getsockname()[3]

3604

2681

3605

try:

2682

# From the Avahi example code

2683

try:

2684

service.activate()

2685

except dbus.exceptions.DBusException as error:

2686

logger.critical("D-Bus Exception", exc_info=error)

2687

cleanup()

2688

sys.exit(1)

2689

# End of Avahi example code

2690

2691

gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,

2692

lambda *args, **kwargs:

2693

(tcp_server.handle_request

2694

(*args[2:], **kwargs) or True))

2695

3606

if zeroconf:

3607

# From the Avahi example code

3608

try:

3609

service.activate()

3610

except dbus.exceptions.DBusException as error:

3611

logger.critical("D-Bus Exception", exc_info=error)

3612

cleanup()

3613

sys.exit(1)

3614

# End of Avahi example code

3615

3616

GLib.io_add_watch(

3617

GLib.IOChannel.unix_new(tcp_server.fileno()),

3618

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

3619

lambda *args, **kwargs: (tcp_server.handle_request

3620

(*args[2:], **kwargs) or True))

3621

2696

3622

logger.debug("Starting main loop")

2697

3623

main_loop.run()

2698

3624

except AvahiError as error:

2707

3633

# Must run before the D-Bus bus name gets deregistered

2708

3634

cleanup()

2709

3635

3636

3637

def should_only_run_tests():

3638

parser = argparse.ArgumentParser(add_help=False)

3639

parser.add_argument("--check", action='store_true')

3640

args, unknown_args = parser.parse_known_args()

3641

run_tests = args.check

3642

if run_tests:

3643

# Remove --check argument from sys.argv

3644

sys.argv[1:] = unknown_args

3645

return run_tests

3646

3647

# Add all tests from doctest strings

3648

def load_tests(loader, tests, none):

3649

import doctest

3650

tests.addTests(doctest.DocTestSuite())

3651

return tests

3652

2710

3653

if __name__ == '__main__':

2711

main()

3654

try:

3655

if should_only_run_tests():

3656

# Call using ./mandos --check [--verbose]

3657

unittest.main()

3658

else:

3659

main()

3660

finally:

3661

logging.shutdown()