/mandos/release : revision 237.7.801

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#!/usr/bin/python2.7

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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 shlex

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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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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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# Add shlex.quote if it does not exist

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try:

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shlex.quote

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except AttributeError:

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shlex.quote = re.escape

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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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if sys.version_info.major == 2:

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str = unicode

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version = "1.6.8"

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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 = "1.8.14"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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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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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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183

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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 =

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logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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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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("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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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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

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" [%(process)d]:"

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" %(levelname)s:"

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" %(message)s"))

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logger.addHandler(console)

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logger.setLevel(level)

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204

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pass

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143

class PGPEngine(object):

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class PGPEngine:

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

213

145

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def __init__(self):

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215

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

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self.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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216

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"):

233

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

234

153

235

def __enter__(self):

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return self

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237

156

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

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self._cleanup()

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return False

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241

160

242

def __del__(self):

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self._cleanup()

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def _cleanup(self):

164

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if self.tempdir is not None:

165

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# Delete contents of tempdir

166

248

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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257

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

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

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return encoded

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268

187

269

def encrypt(self, data, password):

188

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir=self.tempdir

190

) as passfile:

271

with tempfile.NamedTemporaryFile(

272

dir=self.tempdir) as passfile:

191

273

passfile.write(passphrase)

192

274

passfile.flush()

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

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'--passphrase-file',

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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,

199

stderr = subprocess.PIPE)

200

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

279

stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

282

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

201

283

if proc.returncode != 0:

202

284

raise PGPError(err)

203

285

return ciphertext

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286

205

287

def decrypt(self, data, password):

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288

passphrase = self.password_encode(password)

207

with tempfile.NamedTemporaryFile(dir = self.tempdir

208

) as passfile:

289

with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

209

291

passfile.write(passphrase)

210

292

passfile.flush()

211

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

212

'--passphrase-file',

293

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

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"--passphrase-file",

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295

passfile.name]

214

296

+ self.gnupgargs,

215

stdin = subprocess.PIPE,

216

stdout = subprocess.PIPE,

217

stderr = subprocess.PIPE)

218

decrypted_plaintext, err = proc.communicate(input

219

= data)

297

stdin=subprocess.PIPE,

298

stdout=subprocess.PIPE,

299

stderr=subprocess.PIPE)

300

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

220

301

if proc.returncode != 0:

221

302

raise PGPError(err)

222

303

return decrypted_plaintext

223

304

224

305

306

# Pretend that we have an Avahi module

307

class avahi:

308

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

309

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

310

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

311

PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

313

DBUS_NAME = "org.freedesktop.Avahi"

314

DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

315

DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

316

DBUS_PATH_SERVER = "/"

317

318

@staticmethod

319

def string_array_to_txt_array(t):

320

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

321

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

322

ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

323

ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

324

ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

325

SERVER_INVALID = 0 # avahi-common/defs.h

326

SERVER_REGISTERING = 1 # avahi-common/defs.h

327

SERVER_RUNNING = 2 # avahi-common/defs.h

328

SERVER_COLLISION = 3 # avahi-common/defs.h

329

SERVER_FAILURE = 4 # avahi-common/defs.h

330

331

225

332

class AvahiError(Exception):

226

333

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

227

334

self.value = value

228

335

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

229

336

**kwargs)

230

337

338

231

339

class AvahiServiceError(AvahiError):

232

340

pass

233

341

342

234

343

class AvahiGroupError(AvahiError):

235

344

pass

236

345

237

346

238

class AvahiService(object):

347

class AvahiService:

239

348

"""An Avahi (Zeroconf) service.

240

349

241

350

Attributes:

242

351

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

243

352

Used to optionally bind to the specified interface.

244

245

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

353

354

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

246

355

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

247

356

port: integer; what port to announce

248

357

TXT: list of strings; TXT record for the service

255

364

server: D-Bus Server

256

365

bus: dbus.SystemBus()

257

366

"""

258

259

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

260

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

261

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

262

protocol = avahi.PROTO_UNSPEC, bus = None):

367

368

def __init__(self,

369

interface=avahi.IF_UNSPEC,

370

name=None,

371

servicetype=None,

372

port=None,

373

TXT=None,

374

domain="",

375

host="",

376

max_renames=32768,

377

protocol=avahi.PROTO_UNSPEC,

378

bus=None):

263

379

self.interface = interface

264

380

self.name = name

265

381

self.type = servicetype

274

390

self.server = None

275

391

self.bus = bus

276

392

self.entry_group_state_changed_match = None

277

278

def rename(self):

393

394

def rename(self, remove=True):

279

395

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

280

396

if self.rename_count >= self.max_renames:

281

397

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

282

398

" after %i retries, exiting.",

283

399

self.rename_count)

284

400

raise AvahiServiceError("Too many renames")

285

self.name = str(self.server

286

.GetAlternativeServiceName(self.name))

401

self.name = str(

402

self.server.GetAlternativeServiceName(self.name))

403

self.rename_count += 1

287

404

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

288

405

self.name)

289

self.remove()

406

if remove:

407

self.remove()

290

408

try:

291

409

self.add()

292

410

except dbus.exceptions.DBusException as error:

293

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

294

self.cleanup()

295

os._exit(1)

296

self.rename_count += 1

297

411

if (error.get_dbus_name()

412

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

413

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

414

return self.rename(remove=False)

415

else:

416

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

417

self.cleanup()

418

os._exit(1)

419

298

420

def remove(self):

299

421

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

300

422

if self.entry_group_state_changed_match is not None:

302

424

self.entry_group_state_changed_match = None

303

425

if self.group is not None:

304

426

self.group.Reset()

305

427

306

428

def add(self):

307

429

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

308

430

self.remove()

313

435

avahi.DBUS_INTERFACE_ENTRY_GROUP)

314

436

self.entry_group_state_changed_match = (

315

437

self.group.connect_to_signal(

316

'StateChanged', self.entry_group_state_changed))

438

"StateChanged", self.entry_group_state_changed))

317

439

logger.debug("Adding Zeroconf service '%s' of type '%s' ...",

318

440

self.name, self.type)

319

441

self.group.AddService(

325

447

dbus.UInt16(self.port),

326

448

avahi.string_array_to_txt_array(self.TXT))

327

449

self.group.Commit()

328

450

329

451

def entry_group_state_changed(self, state, error):

330

452

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

331

453

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

332

454

333

455

if state == avahi.ENTRY_GROUP_ESTABLISHED:

334

456

logger.debug("Zeroconf service established.")

335

457

elif state == avahi.ENTRY_GROUP_COLLISION:

338

460

elif state == avahi.ENTRY_GROUP_FAILURE:

339

461

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

340

462

str(error))

341

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

342

.format(error))

343

463

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

464

344

465

def cleanup(self):

345

466

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

346

467

if self.group is not None:

351

472

pass

352

473

self.group = None

353

474

self.remove()

354

475

355

476

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

356

477

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

357

478

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

358

bad_states = { avahi.SERVER_INVALID:

359

"Zeroconf server invalid",

360

avahi.SERVER_REGISTERING: None,

361

avahi.SERVER_COLLISION:

362

"Zeroconf server name collision",

363

avahi.SERVER_FAILURE:

364

"Zeroconf server failure" }

479

bad_states = {

480

avahi.SERVER_INVALID: "Zeroconf server invalid",

481

avahi.SERVER_REGISTERING: None,

482

avahi.SERVER_COLLISION: "Zeroconf server name collision",

483

avahi.SERVER_FAILURE: "Zeroconf server failure",

484

}

365

485

if state in bad_states:

366

486

if bad_states[state] is not None:

367

487

if error is None:

370

490

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

371

491

self.cleanup()

372

492

elif state == avahi.SERVER_RUNNING:

373

self.add()

493

try:

494

self.add()

495

except dbus.exceptions.DBusException as error:

496

if (error.get_dbus_name()

497

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

498

logger.info("Local Zeroconf service name"

499

" collision.")

500

return self.rename(remove=False)

501

else:

502

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

503

self.cleanup()

504

os._exit(1)

374

505

else:

375

506

if error is None:

376

507

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

377

508

else:

378

509

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

379

510

380

511

def activate(self):

381

512

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

382

513

if self.server is None:

386

517

follow_name_owner_changes=True),

387

518

avahi.DBUS_INTERFACE_SERVER)

388

519

self.server.connect_to_signal("StateChanged",

389

self.server_state_changed)

520

self.server_state_changed)

390

521

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

391

522

392

523

393

524

class AvahiServiceToSyslog(AvahiService):

394

def rename(self):

525

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

395

526

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

396

ret = AvahiService.rename(self)

397

syslogger.setFormatter(logging.Formatter

398

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

399

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

400

.format(self.name)))

527

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

528

**kwargs)

529

syslogger.setFormatter(logging.Formatter(

530

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

531

.format(self.name)))

401

532

return ret

402

533

403

534

404

class Client(object):

535

# Pretend that we have a GnuTLS module

536

class gnutls:

537

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

538

539

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

540

if library is None:

541

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

542

_library = ctypes.cdll.LoadLibrary(library)

543

del library

544

545

# Unless otherwise indicated, the constants and types below are

546

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

547

548

# Constants

549

E_SUCCESS = 0

550

E_INTERRUPTED = -52

551

E_AGAIN = -28

552

CRT_OPENPGP = 2

553

CRT_RAWPK = 3

554

CLIENT = 2

555

SHUT_RDWR = 0

556

CRD_CERTIFICATE = 1

557

E_NO_CERTIFICATE_FOUND = -49

558

X509_FMT_DER = 0

559

NO_TICKETS = 1<<10

560

ENABLE_RAWPK = 1<<18

561

CTYPE_PEERS = 3

562

KEYID_USE_SHA256 = 1 # gnutls/x509.h

563

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

564

565

# Types

566

class _session_int(ctypes.Structure):

567

_fields_ = []

568

session_t = ctypes.POINTER(_session_int)

569

570

class certificate_credentials_st(ctypes.Structure):

571

_fields_ = []

572

certificate_credentials_t = ctypes.POINTER(

573

certificate_credentials_st)

574

certificate_type_t = ctypes.c_int

575

576

class datum_t(ctypes.Structure):

577

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

578

("size", ctypes.c_uint)]

579

580

class _openpgp_crt_int(ctypes.Structure):

581

_fields_ = []

582

openpgp_crt_t = ctypes.POINTER(_openpgp_crt_int)

583

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

584

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

585

credentials_type_t = ctypes.c_int

586

transport_ptr_t = ctypes.c_void_p

587

close_request_t = ctypes.c_int

588

589

# Exceptions

590

class Error(Exception):

591

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

592

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

593

# code is passed, convert it to a string with

594

# gnutls.strerror()

595

self.code = code

596

if message is None and code is not None:

597

message = gnutls.strerror(code).decode(

598

"utf-8", errors="replace")

599

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

600

message, *args)

601

602

class CertificateSecurityError(Error):

603

pass

604

605

class PointerTo:

606

def __init__(self, cls):

607

self.cls = cls

608

609

def from_param(self, obj):

610

if not isinstance(obj, self.cls):

611

raise TypeError("Not of type {}: {!r}"

612

.format(self.cls.__name__, obj))

613

return ctypes.byref(obj.from_param(obj))

614

615

class CastToVoidPointer:

616

def __init__(self, cls):

617

self.cls = cls

618

619

def from_param(self, obj):

620

if not isinstance(obj, self.cls):

621

raise TypeError("Not of type {}: {!r}"

622

.format(self.cls.__name__, obj))

623

return ctypes.cast(obj.from_param(obj), ctypes.c_void_p)

624

625

class With_from_param:

626

@classmethod

627

def from_param(cls, obj):

628

return obj._as_parameter_

629

630

# Classes

631

class Credentials(With_from_param):

632

def __init__(self):

633

self._as_parameter_ = gnutls.certificate_credentials_t()

634

gnutls.certificate_allocate_credentials(self)

635

self.type = gnutls.CRD_CERTIFICATE

636

637

def __del__(self):

638

gnutls.certificate_free_credentials(self)

639

640

class ClientSession(With_from_param):

641

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

642

self._as_parameter_ = gnutls.session_t()

643

gnutls_flags = gnutls.CLIENT

644

if gnutls.check_version(b"3.5.6"):

645

gnutls_flags |= gnutls.NO_TICKETS

646

if gnutls.has_rawpk:

647

gnutls_flags |= gnutls.ENABLE_RAWPK

648

gnutls.init(self, gnutls_flags)

649

del gnutls_flags

650

gnutls.set_default_priority(self)

651

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

652

gnutls.handshake_set_private_extensions(self, True)

653

self.socket = socket

654

if credentials is None:

655

credentials = gnutls.Credentials()

656

gnutls.credentials_set(self, credentials.type,

657

credentials)

658

self.credentials = credentials

659

660

def __del__(self):

661

gnutls.deinit(self)

662

663

def handshake(self):

664

return gnutls.handshake(self)

665

666

def send(self, data):

667

data = bytes(data)

668

data_len = len(data)

669

while data_len > 0:

670

data_len -= gnutls.record_send(self, data[-data_len:],

671

data_len)

672

673

def bye(self):

674

return gnutls.bye(self, gnutls.SHUT_RDWR)

675

676

# Error handling functions

677

def _error_code(result):

678

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

679

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

680

if result >= gnutls.E_SUCCESS:

681

return result

682

if result == gnutls.E_NO_CERTIFICATE_FOUND:

683

raise gnutls.CertificateSecurityError(code=result)

684

raise gnutls.Error(code=result)

685

686

def _retry_on_error(result, func, arguments,

687

_error_code=_error_code):

688

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

689

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

690

while result < gnutls.E_SUCCESS:

691

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

692

return _error_code(result)

693

result = func(*arguments)

694

return result

695

696

# Unless otherwise indicated, the function declarations below are

697

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

698

699

# Functions

700

priority_set_direct = _library.gnutls_priority_set_direct

701

priority_set_direct.argtypes = [ClientSession, ctypes.c_char_p,

702

ctypes.POINTER(ctypes.c_char_p)]

703

priority_set_direct.restype = _error_code

704

705

init = _library.gnutls_init

706

init.argtypes = [PointerTo(ClientSession), ctypes.c_int]

707

init.restype = _error_code

708

709

set_default_priority = _library.gnutls_set_default_priority

710

set_default_priority.argtypes = [ClientSession]

711

set_default_priority.restype = _error_code

712

713

record_send = _library.gnutls_record_send

714

record_send.argtypes = [ClientSession, ctypes.c_void_p,

715

ctypes.c_size_t]

716

record_send.restype = ctypes.c_ssize_t

717

record_send.errcheck = _retry_on_error

718

719

certificate_allocate_credentials = (

720

_library.gnutls_certificate_allocate_credentials)

721

certificate_allocate_credentials.argtypes = [

722

PointerTo(Credentials)]

723

certificate_allocate_credentials.restype = _error_code

724

725

certificate_free_credentials = (

726

_library.gnutls_certificate_free_credentials)

727

certificate_free_credentials.argtypes = [Credentials]

728

certificate_free_credentials.restype = None

729

730

handshake_set_private_extensions = (

731

_library.gnutls_handshake_set_private_extensions)

732

handshake_set_private_extensions.argtypes = [ClientSession,

733

ctypes.c_int]

734

handshake_set_private_extensions.restype = None

735

736

credentials_set = _library.gnutls_credentials_set

737

credentials_set.argtypes = [ClientSession, credentials_type_t,

738

CastToVoidPointer(Credentials)]

739

credentials_set.restype = _error_code

740

741

strerror = _library.gnutls_strerror

742

strerror.argtypes = [ctypes.c_int]

743

strerror.restype = ctypes.c_char_p

744

745

certificate_type_get = _library.gnutls_certificate_type_get

746

certificate_type_get.argtypes = [ClientSession]

747

certificate_type_get.restype = _error_code

748

749

certificate_get_peers = _library.gnutls_certificate_get_peers

750

certificate_get_peers.argtypes = [ClientSession,

751

ctypes.POINTER(ctypes.c_uint)]

752

certificate_get_peers.restype = ctypes.POINTER(datum_t)

753

754

global_set_log_level = _library.gnutls_global_set_log_level

755

global_set_log_level.argtypes = [ctypes.c_int]

756

global_set_log_level.restype = None

757

758

global_set_log_function = _library.gnutls_global_set_log_function

759

global_set_log_function.argtypes = [log_func]

760

global_set_log_function.restype = None

761

762

deinit = _library.gnutls_deinit

763

deinit.argtypes = [ClientSession]

764

deinit.restype = None

765

766

handshake = _library.gnutls_handshake

767

handshake.argtypes = [ClientSession]

768

handshake.restype = ctypes.c_int

769

handshake.errcheck = _retry_on_error

770

771

transport_set_ptr = _library.gnutls_transport_set_ptr

772

transport_set_ptr.argtypes = [ClientSession, transport_ptr_t]

773

transport_set_ptr.restype = None

774

775

bye = _library.gnutls_bye

776

bye.argtypes = [ClientSession, close_request_t]

777

bye.restype = ctypes.c_int

778

bye.errcheck = _retry_on_error

779

780

check_version = _library.gnutls_check_version

781

check_version.argtypes = [ctypes.c_char_p]

782

check_version.restype = ctypes.c_char_p

783

784

_need_version = b"3.3.0"

785

if check_version(_need_version) is None:

786

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

787

.format(_need_version))

788

789

_tls_rawpk_version = b"3.6.6"

790

has_rawpk = bool(check_version(_tls_rawpk_version))

791

792

if has_rawpk:

793

# Types

794

class pubkey_st(ctypes.Structure):

795

_fields = []

796

pubkey_t = ctypes.POINTER(pubkey_st)

797

798

x509_crt_fmt_t = ctypes.c_int

799

800

# All the function declarations below are from

801

# gnutls/abstract.h

802

pubkey_init = _library.gnutls_pubkey_init

803

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

804

pubkey_init.restype = _error_code

805

806

pubkey_import = _library.gnutls_pubkey_import

807

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

808

x509_crt_fmt_t]

809

pubkey_import.restype = _error_code

810

811

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

812

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

813

ctypes.POINTER(ctypes.c_ubyte),

814

ctypes.POINTER(ctypes.c_size_t)]

815

pubkey_get_key_id.restype = _error_code

816

817

pubkey_deinit = _library.gnutls_pubkey_deinit

818

pubkey_deinit.argtypes = [pubkey_t]

819

pubkey_deinit.restype = None

820

else:

821

# All the function declarations below are from

822

# gnutls/openpgp.h

823

824

openpgp_crt_init = _library.gnutls_openpgp_crt_init

825

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

826

openpgp_crt_init.restype = _error_code

827

828

openpgp_crt_import = _library.gnutls_openpgp_crt_import

829

openpgp_crt_import.argtypes = [openpgp_crt_t,

830

ctypes.POINTER(datum_t),

831

openpgp_crt_fmt_t]

832

openpgp_crt_import.restype = _error_code

833

834

openpgp_crt_verify_self = \

835

_library.gnutls_openpgp_crt_verify_self

836

openpgp_crt_verify_self.argtypes = [

837

openpgp_crt_t,

838

ctypes.c_uint,

839

ctypes.POINTER(ctypes.c_uint),

840

]

841

openpgp_crt_verify_self.restype = _error_code

842

843

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

844

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

845

openpgp_crt_deinit.restype = None

846

847

openpgp_crt_get_fingerprint = (

848

_library.gnutls_openpgp_crt_get_fingerprint)

849

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

850

ctypes.c_void_p,

851

ctypes.POINTER(

852

ctypes.c_size_t)]

853

openpgp_crt_get_fingerprint.restype = _error_code

854

855

if check_version(b"3.6.4"):

856

certificate_type_get2 = _library.gnutls_certificate_type_get2

857

certificate_type_get2.argtypes = [ClientSession, ctypes.c_int]

858

certificate_type_get2.restype = _error_code

859

860

# Remove non-public functions

861

del _error_code, _retry_on_error

862

863

864

def call_pipe(connection, # : multiprocessing.Connection

865

func, *args, **kwargs):

866

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

867

868

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

869

return value on the provided multiprocessing.Connection.

870

"""

871

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

872

connection.close()

873

874

875

class Client:

405

876

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

406

877

407

878

Attributes:

408

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

879

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

409

880

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

410

881

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

411

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

412

to see if the client lives.

413

'None' if no process is running.

414

checker_callback_tag: a gobject event source tag, or None

882

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

883

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

884

running.

885

checker_callback_tag: a GLib event source tag, or None

415

886

checker_command: string; External command which is run to check

416

887

if client lives. %() expansions are done at

417

888

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

418

889

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

419

checker_initiator_tag: a gobject event source tag, or None

890

checker_initiator_tag: a GLib event source tag, or None

420

891

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

421

892

client_structure: Object describing what attributes a client has

422

893

and is used for storing the client at exit

423

894

current_checker_command: string; current running checker_command

424

disable_initiator_tag: a gobject event source tag, or None

895

disable_initiator_tag: a GLib event source tag, or None

425

896

enabled: bool()

426

897

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

427

uniquely identify the client

898

uniquely identify an OpenPGP client

899

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

900

a client using raw public keys

428

901

host: string; available for use by the checker command

429

902

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

430

903

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

432

905

last_checker_status: integer between 0 and 255 reflecting exit

433

906

status of last checker. -1 reflects crashed

434

907

checker, -2 means no checker completed yet.

908

last_checker_signal: The signal which killed the last checker, if

909

last_checker_status is -1

435

910

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

436

911

437

912

D-Bus identifiers

444

919

disabled, or None

445

920

server_settings: The server_settings dict from main()

446

921

"""

447

922

448

923

runtime_expansions = ("approval_delay", "approval_duration",

449

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

924

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

450

925

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

451

926

"last_approval_request", "last_checked_ok",

452

927

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

453

client_defaults = { "timeout": "PT5M",

454

"extended_timeout": "PT15M",

455

"interval": "PT2M",

456

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

457

"host": "",

458

"approval_delay": "PT0S",

459

"approval_duration": "PT1S",

460

"approved_by_default": "True",

461

"enabled": "True",

462

}

463

928

client_defaults = {

929

"timeout": "PT5M",

930

"extended_timeout": "PT15M",

931

"interval": "PT2M",

932

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

933

"host": "",

934

"approval_delay": "PT0S",

935

"approval_duration": "PT1S",

936

"approved_by_default": "True",

937

"enabled": "True",

938

}

939

464

940

@staticmethod

465

941

def config_parser(config):

466

942

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

473

949

for client_name in config.sections():

474

950

section = dict(config.items(client_name))

475

951

client = settings[client_name] = {}

476

952

477

953

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

478

954

# Reformat values from string types to Python types

479

955

client["approved_by_default"] = config.getboolean(

480

956

client_name, "approved_by_default")

481

957

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

482

958

"enabled")

483

959

960

# Uppercase and remove spaces from key_id and fingerprint

961

# for later comparison purposes with return value from the

962

# key_id() and fingerprint() functions

963

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

964

.replace(" ", ""))

484

965

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

485

966

.replace(" ", ""))

486

967

if "secret" in section:

487

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

968

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

969

.encode("utf-8"),

970

"base64")

488

971

elif "secfile" in section:

489

972

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

490

973

(section["secfile"])),

505

988

client["last_approval_request"] = None

506

989

client["last_checked_ok"] = None

507

990

client["last_checker_status"] = -2

508

991

509

992

return settings

510

511

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

993

994

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

512

995

self.name = name

513

996

if server_settings is None:

514

997

server_settings = {}

516

999

# adding all client settings

517

1000

for setting, value in settings.items():

518

1001

setattr(self, setting, value)

519

1002

520

1003

if self.enabled:

521

1004

if not hasattr(self, "last_enabled"):

522

1005

self.last_enabled = datetime.datetime.utcnow()

526

1009

else:

527

1010

self.last_enabled = None

528

1011

self.expires = None

529

1012

530

1013

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

531

# Uppercase and remove spaces from fingerprint for later

532

# comparison purposes with return value from the fingerprint()

533

# function

1014

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

534

1015

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

535

1016

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

536

1017

datetime.datetime.utcnow())

537

1018

538

1019

# attributes specific for this server instance

539

1020

self.checker = None

540

1021

self.checker_initiator_tag = None

543

1024

self.current_checker_command = None

544

1025

self.approved = None

545

1026

self.approvals_pending = 0

546

self.changedstate = (multiprocessing_manager

547

.Condition(multiprocessing_manager

548

.Lock()))

549

self.client_structure = [attr for attr in

550

self.__dict__.iterkeys()

1027

self.changedstate = multiprocessing_manager.Condition(

1028

multiprocessing_manager.Lock())

1029

self.client_structure = [attr

1030

for attr in self.__dict__.keys()

551

1031

if not attr.startswith("_")]

552

1032

self.client_structure.append("client_structure")

553

554

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

555

lambda obj:

556

isinstance(obj,

557

property)):

1033

1034

for name, t in inspect.getmembers(

1035

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

558

1036

if not name.startswith("_"):

559

1037

self.client_structure.append(name)

560

1038

561

1039

# Send notice to process children that client state has changed

562

1040

def send_changedstate(self):

563

1041

with self.changedstate:

564

1042

self.changedstate.notify_all()

565

1043

566

1044

def enable(self):

567

1045

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

568

1046

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

573

1051

self.last_enabled = datetime.datetime.utcnow()

574

1052

self.init_checker()

575

1053

self.send_changedstate()

576

1054

577

1055

def disable(self, quiet=True):

578

1056

"""Disable this client."""

579

1057

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

581

1059

if not quiet:

582

1060

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

583

1061

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

584

gobject.source_remove(self.disable_initiator_tag)

1062

GLib.source_remove(self.disable_initiator_tag)

585

1063

self.disable_initiator_tag = None

586

1064

self.expires = None

587

1065

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

588

gobject.source_remove(self.checker_initiator_tag)

1066

GLib.source_remove(self.checker_initiator_tag)

589

1067

self.checker_initiator_tag = None

590

1068

self.stop_checker()

591

1069

self.enabled = False

592

1070

if not quiet:

593

1071

self.send_changedstate()

594

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

1072

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

595

1073

return False

596

1074

597

1075

def __del__(self):

598

1076

self.disable()

599

1077

600

1078

def init_checker(self):

601

1079

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

602

1080

# and every interval from then on.

603

1081

if self.checker_initiator_tag is not None:

604

gobject.source_remove(self.checker_initiator_tag)

605

self.checker_initiator_tag = (gobject.timeout_add

606

(int(self.interval

607

.total_seconds() * 1000),

608

self.start_checker))

1082

GLib.source_remove(self.checker_initiator_tag)

1083

self.checker_initiator_tag = GLib.timeout_add(

1084

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

1085

+ 1)),

1086

self.start_checker)

609

1087

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

610

1088

if self.disable_initiator_tag is not None:

611

gobject.source_remove(self.disable_initiator_tag)

612

self.disable_initiator_tag = (gobject.timeout_add

613

(int(self.timeout

614

.total_seconds() * 1000),

615

self.disable))

1089

GLib.source_remove(self.disable_initiator_tag)

1090

self.disable_initiator_tag = GLib.timeout_add(

1091

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

616

1092

# Also start a new checker *right now*.

617

1093

self.start_checker()

618

619

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

1094

1095

def checker_callback(self, source, condition, connection,

1096

command):

620

1097

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

1098

# Read return code from connection (see call_pipe)

1099

returncode = connection.recv()

1100

connection.close()

1101

if self.checker is not None:

1102

self.checker.join()

621

1103

self.checker_callback_tag = None

622

1104

self.checker = None

623

if os.WIFEXITED(condition):

624

self.last_checker_status = os.WEXITSTATUS(condition)

1105

1106

if returncode >= 0:

1107

self.last_checker_status = returncode

1108

self.last_checker_signal = None

625

1109

if self.last_checker_status == 0:

626

1110

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

627

1111

vars(self))

628

1112

self.checked_ok()

629

1113

else:

630

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

631

vars(self))

1114

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

632

1115

else:

633

1116

self.last_checker_status = -1

1117

self.last_checker_signal = -returncode

634

1118

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

635

1119

vars(self))

636

1120

return False

1121

637

1122

def checked_ok(self):

638

1123

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

639

1124

self.last_checked_ok = datetime.datetime.utcnow()

640

1125

self.last_checker_status = 0

1126

self.last_checker_signal = None

641

1127

self.bump_timeout()

642

1128

643

1129

def bump_timeout(self, timeout=None):

644

1130

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

645

1131

if timeout is None:

646

1132

timeout = self.timeout

647

1133

if self.disable_initiator_tag is not None:

648

gobject.source_remove(self.disable_initiator_tag)

1134

GLib.source_remove(self.disable_initiator_tag)

649

1135

self.disable_initiator_tag = None

650

1136

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

651

self.disable_initiator_tag = (gobject.timeout_add

652

(int(timeout.total_seconds()

653

* 1000), self.disable))

1137

self.disable_initiator_tag = GLib.timeout_add(

1138

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

654

1139

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

655

1140

656

1141

def need_approval(self):

657

1142

self.last_approval_request = datetime.datetime.utcnow()

658

1143

659

1144

def start_checker(self):

660

1145

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

661

1146

662

1147

If a checker already exists, leave it running and do

663

1148

nothing."""

664

1149

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

669

1154

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

670

1155

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

671

1156

# should be.

672

673

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

674

try:

675

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

676

except AttributeError:

677

pass

678

except OSError as error:

679

if error.errno != errno.ECHILD:

680

raise

681

else:

682

if pid:

683

logger.warning("Checker was a zombie")

684

gobject.source_remove(self.checker_callback_tag)

685

self.checker_callback(pid, status,

686

self.current_checker_command)

1157

1158

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

1159

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

1160

self.checker.join()

1161

self.checker = None

687

1162

# Start a new checker if needed

688

1163

if self.checker is None:

689

1164

# Escape attributes for the shell

690

escaped_attrs = { attr:

691

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

692

for attr in self.runtime_expansions }

1165

escaped_attrs = {

1166

attr: shlex.quote(str(getattr(self, attr)))

1167

for attr in self.runtime_expansions}

693

1168

try:

694

1169

command = self.checker_command % escaped_attrs

695

1170

except TypeError as error:

696

1171

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

697

self.checker_command, exc_info=error)

698

return True # Try again later

1172

self.checker_command,

1173

exc_info=error)

1174

return True # Try again later

699

1175

self.current_checker_command = command

700

try:

701

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

702

command, self.name)

703

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

704

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

705

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

706

# always replaced by /dev/null.)

707

# The exception is when not debugging but nevertheless

708

# running in the foreground; use the previously

709

# created wnull.

710

popen_args = {}

711

if (not self.server_settings["debug"]

712

and self.server_settings["foreground"]):

713

popen_args.update({"stdout": wnull,

714

"stderr": wnull })

715

self.checker = subprocess.Popen(command,

716

close_fds=True,

717

shell=True, cwd="/",

718

**popen_args)

719

except OSError as error:

720

logger.error("Failed to start subprocess",

721

exc_info=error)

722

return True

723

self.checker_callback_tag = (gobject.child_watch_add

724

(self.checker.pid,

725

self.checker_callback,

726

data=command))

727

# The checker may have completed before the gobject

728

# watch was added. Check for this.

729

try:

730

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

731

except OSError as error:

732

if error.errno == errno.ECHILD:

733

# This should never happen

734

logger.error("Child process vanished",

735

exc_info=error)

736

return True

737

raise

738

if pid:

739

gobject.source_remove(self.checker_callback_tag)

740

self.checker_callback(pid, status, command)

741

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

1176

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

1177

self.name)

1178

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

1179

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

1180

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

1181

# always replaced by /dev/null.)

1182

# The exception is when not debugging but nevertheless

1183

# running in the foreground; use the previously

1184

# created wnull.

1185

popen_args = {"close_fds": True,

1186

"shell": True,

1187

"cwd": "/"}

1188

if (not self.server_settings["debug"]

1189

and self.server_settings["foreground"]):

1190

popen_args.update({"stdout": wnull,

1191

"stderr": wnull})

1192

pipe = multiprocessing.Pipe(duplex=False)

1193

self.checker = multiprocessing.Process(

1194

target=call_pipe,

1195

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

1196

kwargs=popen_args)

1197

self.checker.start()

1198

self.checker_callback_tag = GLib.io_add_watch(

1199

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

1200

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

1201

self.checker_callback, pipe[0], command)

1202

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

742

1203

return True

743

1204

744

1205

def stop_checker(self):

745

1206

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

746

1207

if self.checker_callback_tag:

747

gobject.source_remove(self.checker_callback_tag)

1208

GLib.source_remove(self.checker_callback_tag)

748

1209

self.checker_callback_tag = None

749

1210

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

750

1211

return

751

1212

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

752

try:

753

self.checker.terminate()

754

#time.sleep(0.5)

755

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

756

# self.checker.kill()

757

except OSError as error:

758

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

759

raise

1213

self.checker.terminate()

760

1214

self.checker = None

761

1215

762

1216

763

def dbus_service_property(dbus_interface, signature="v",

764

access="readwrite", byte_arrays=False):

1217

def dbus_service_property(dbus_interface,

1218

signature="v",

1219

access="readwrite",

1220

byte_arrays=False):

765

1221

"""Decorators for marking methods of a DBusObjectWithProperties to

766

1222

become properties on the D-Bus.

767

1223

768

1224

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

769

1225

and with one argument by "Set".

770

1226

771

1227

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

772

1228

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

773

1229

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

777

1233

if byte_arrays and signature != "ay":

778

1234

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

779

1235

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

1236

780

1237

def decorator(func):

781

1238

func._dbus_is_property = True

782

1239

func._dbus_interface = dbus_interface

785

1242

func._dbus_name = func.__name__

786

1243

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

787

1244

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

788

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1245

func._dbus_get_args_options = {"byte_arrays": byte_arrays}

789

1246

return func

1247

790

1248

return decorator

791

1249

792

1250

793

1251

def dbus_interface_annotations(dbus_interface):

794

1252

"""Decorator for marking functions returning interface annotations

795

1253

796

1254

Usage:

797

1255

798

1256

@dbus_interface_annotations("org.example.Interface")

799

1257

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

800

1258

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

801

1259

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

802

1260

"false"}

803

1261

"""

1262

804

1263

def decorator(func):

805

1264

func._dbus_is_interface = True

806

1265

func._dbus_interface = dbus_interface

807

1266

func._dbus_name = dbus_interface

808

1267

return func

1268

809

1269

return decorator

810

1270

811

1271

812

1272

def dbus_annotations(annotations):

813

1273

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

814

1274

Usage:

815

1275

1276

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

1277

"org.freedesktop.DBus.Property."

1278

"EmitsChangedSignal": "false"})

816

1279

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

817

1280

access="r")

818

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

819

"org.freedesktop.DBus.Property."

820

"EmitsChangedSignal": "false"})

821

1281

def Property_dbus_property(self):

822

1282

return dbus.Boolean(False)

1283

1284

See also the DBusObjectWithAnnotations class.

823

1285

"""

1286

824

1287

def decorator(func):

825

1288

func._dbus_annotations = annotations

826

1289

return func

1290

827

1291

return decorator

828

1292

829

1293

832

1296

"""

833

1297

pass

834

1298

1299

835

1300

class DBusPropertyAccessException(DBusPropertyException):

836

1301

"""A property's access permissions disallows an operation.

837

1302

"""

844

1309

pass

845

1310

846

1311

847

class DBusObjectWithProperties(dbus.service.Object):

848

"""A D-Bus object with properties.

849

850

Classes inheriting from this can use the dbus_service_property

851

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

852

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

1312

class DBusObjectWithAnnotations(dbus.service.Object):

1313

"""A D-Bus object with annotations.

1314

1315

Classes inheriting from this can use the dbus_annotations

1316

decorator to add annotations to methods or signals.

853

1317

"""

854

1318

855

1319

@staticmethod

856

1320

def _is_dbus_thing(thing):

857

1321

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

858

1322

859

1323

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

860

1324

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

861

1325

"""

862

1326

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

863

1327

False)

864

1328

865

1329

def _get_all_dbus_things(self, thing):

866

1330

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

867

1331

"""

868

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

869

name),

1332

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

870

1333

athing.__get__(self))

871

1334

for cls in self.__class__.__mro__

872

1335

for name, athing in

873

inspect.getmembers(cls,

874

self._is_dbus_thing(thing)))

875

1336

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

1337

1338

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1339

out_signature="s",

1340

path_keyword="object_path",

1341

connection_keyword="connection")

1342

def Introspect(self, object_path, connection):

1343

"""Overloading of standard D-Bus method.

1344

1345

Inserts annotation tags on methods and signals.

1346

"""

1347

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

1348

connection)

1349

try:

1350

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

1351

1352

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

1353

# Add annotation tags

1354

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

1355

for tag in if_tag.getElementsByTagName(typ):

1356

annots = dict()

1357

for name, prop in (self.

1358

_get_all_dbus_things(typ)):

1359

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

1360

and prop._dbus_interface

1361

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

1362

annots.update(getattr(

1363

prop, "_dbus_annotations", {}))

1364

for name, value in annots.items():

1365

ann_tag = document.createElement(

1366

"annotation")

1367

ann_tag.setAttribute("name", name)

1368

ann_tag.setAttribute("value", value)

1369

tag.appendChild(ann_tag)

1370

# Add interface annotation tags

1371

for annotation, value in dict(

1372

itertools.chain.from_iterable(

1373

annotations().items()

1374

for name, annotations

1375

in self._get_all_dbus_things("interface")

1376

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

1377

)).items():

1378

ann_tag = document.createElement("annotation")

1379

ann_tag.setAttribute("name", annotation)

1380

ann_tag.setAttribute("value", value)

1381

if_tag.appendChild(ann_tag)

1382

# Fix argument name for the Introspect method itself

1383

if (if_tag.getAttribute("name")

1384

== dbus.INTROSPECTABLE_IFACE):

1385

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

1386

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

1387

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

1388

if (arg.getAttribute("direction")

1389

== "out"):

1390

arg.setAttribute("name",

1391

"xml_data")

1392

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

1393

document.unlink()

1394

except (AttributeError, xml.dom.DOMException,

1395

xml.parsers.expat.ExpatError) as error:

1396

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

1397

exc_info=error)

1398

return xmlstring

1399

1400

1401

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1402

"""A D-Bus object with properties.

1403

1404

Classes inheriting from this can use the dbus_service_property

1405

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

1406

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

1407

"""

1408

876

1409

def _get_dbus_property(self, interface_name, property_name):

877

1410

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

878

1411

property with the specified name and interface.

879

1412

"""

880

for cls in self.__class__.__mro__:

881

for name, value in (inspect.getmembers

882

(cls,

883

self._is_dbus_thing("property"))):

1413

for cls in self.__class__.__mro__:

1414

for name, value in inspect.getmembers(

1415

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

884

1416

if (value._dbus_name == property_name

885

1417

and value._dbus_interface == interface_name):

886

1418

return value.__get__(self)

887

1419

888

1420

# No such property

889

raise DBusPropertyNotFound(self.dbus_object_path + ":"

890

+ interface_name + "."

891

+ property_name)

892

893

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

1421

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

1422

self.dbus_object_path, interface_name, property_name))

1423

1424

@classmethod

1425

def _get_all_interface_names(cls):

1426

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

1427

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

1428

"_dbus_interface", None)

1429

for x in (inspect.getmro(cls))

1430

for attr in dir(x))

1431

if name is not None)

1432

1433

@dbus.service.method(dbus.PROPERTIES_IFACE,

1434

in_signature="ss",

894

1435

out_signature="v")

895

1436

def Get(self, interface_name, property_name):

896

1437

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

902

1443

if not hasattr(value, "variant_level"):

903

1444

return value

904

1445

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

905

1446

906

1447

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

907

1448

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

908

1449

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

917

1458

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

918

1459

"'ay' signature {!r}"

919

1460

.format(prop._dbus_signature))

920

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

921

for byte in value))

1461

value = dbus.ByteArray(bytes(value))

922

1462

prop(value)

923

924

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

1463

1464

@dbus.service.method(dbus.PROPERTIES_IFACE,

1465

in_signature="s",

925

1466

out_signature="a{sv}")

926

1467

def GetAll(self, interface_name):

927

1468

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

928

1469

standard.

929

1470

930

1471

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

931

1472

"""

932

1473

properties = {}

942

1483

if not hasattr(value, "variant_level"):

943

1484

properties[name] = value

944

1485

continue

945

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

946

value.variant_level+1)

1486

properties[name] = type(value)(

1487

value, variant_level=value.variant_level + 1)

947

1488

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

948

1489

1490

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

1491

def PropertiesChanged(self, interface_name, changed_properties,

1492

invalidated_properties):

1493

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

1494

standard.

1495

"""

1496

pass

1497

949

1498

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

950

1499

out_signature="s",

951

path_keyword='object_path',

952

connection_keyword='connection')

1500

path_keyword="object_path",

1501

connection_keyword="connection")

953

1502

def Introspect(self, object_path, connection):

954

1503

"""Overloading of standard D-Bus method.

955

1504

956

1505

Inserts property tags and interface annotation tags.

957

1506

"""

958

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

959

connection)

1507

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1508

object_path,

1509

connection)

960

1510

try:

961

1511

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

1512

962

1513

def make_tag(document, name, prop):

963

1514

e = document.createElement("property")

964

1515

e.setAttribute("name", name)

965

1516

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

966

1517

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

967

1518

return e

1519

968

1520

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

969

1521

# Add property tags

970

1522

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

973

1525

if prop._dbus_interface

974

1526

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

975

1527

if_tag.appendChild(tag)

976

# Add annotation tags

977

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

978

for tag in if_tag.getElementsByTagName(typ):

979

annots = dict()

980

for name, prop in (self.

981

_get_all_dbus_things(typ)):

982

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

983

and prop._dbus_interface

984

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

985

annots.update(getattr

986

(prop,

987

"_dbus_annotations",

988

{}))

989

for name, value in annots.items():

990

ann_tag = document.createElement(

991

"annotation")

992

ann_tag.setAttribute("name", name)

993

ann_tag.setAttribute("value", value)

994

tag.appendChild(ann_tag)

995

# Add interface annotation tags

996

for annotation, value in dict(

997

itertools.chain.from_iterable(

998

annotations().items()

999

for name, annotations in

1000

self._get_all_dbus_things("interface")

1001

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

1002

)).items():

1003

ann_tag = document.createElement("annotation")

1004

ann_tag.setAttribute("name", annotation)

1005

ann_tag.setAttribute("value", value)

1006

if_tag.appendChild(ann_tag)

1528

# Add annotation tags for properties

1529

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

1530

annots = dict()

1531

for name, prop in self._get_all_dbus_things(

1532

"property"):

1533

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

1534

and prop._dbus_interface

1535

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

1536

annots.update(getattr(

1537

prop, "_dbus_annotations", {}))

1538

for name, value in annots.items():

1539

ann_tag = document.createElement(

1540

"annotation")

1541

ann_tag.setAttribute("name", name)

1542

ann_tag.setAttribute("value", value)

1543

tag.appendChild(ann_tag)

1007

1544

# Add the names to the return values for the

1008

1545

# "org.freedesktop.DBus.Properties" methods

1009

1546

if (if_tag.getAttribute("name")

1028

1565

return xmlstring

1029

1566

1030

1567

1568

try:

1569

dbus.OBJECT_MANAGER_IFACE

1570

except AttributeError:

1571

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

1572

1573

1574

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1575

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

1576

1577

Classes inheriting from this exposes the standard

1578

GetManagedObjects call and the InterfacesAdded and

1579

InterfacesRemoved signals on the standard

1580

"org.freedesktop.DBus.ObjectManager" interface.

1581

1582

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

1583

manually.

1584

"""

1585

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1586

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

1587

def GetManagedObjects(self):

1588

"""This function must be overridden"""

1589

raise NotImplementedError()

1590

1591

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1592

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

1593

def InterfacesAdded(self, object_path, interfaces_and_properties):

1594

pass

1595

1596

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

1597

def InterfacesRemoved(self, object_path, interfaces):

1598

pass

1599

1600

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1601

out_signature="s",

1602

path_keyword="object_path",

1603

connection_keyword="connection")

1604

def Introspect(self, object_path, connection):

1605

"""Overloading of standard D-Bus method.

1606

1607

Override return argument name of GetManagedObjects to be

1608

"objpath_interfaces_and_properties"

1609

"""

1610

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1611

object_path,

1612

connection)

1613

try:

1614

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

1615

1616

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

1617

# Fix argument name for the GetManagedObjects method

1618

if (if_tag.getAttribute("name")

1619

== dbus.OBJECT_MANAGER_IFACE):

1620

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

1621

if (cn.getAttribute("name")

1622

== "GetManagedObjects"):

1623

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

1624

if (arg.getAttribute("direction")

1625

== "out"):

1626

arg.setAttribute(

1627

"name",

1628

"objpath_interfaces"

1629

"_and_properties")

1630

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

1631

document.unlink()

1632

except (AttributeError, xml.dom.DOMException,

1633

xml.parsers.expat.ExpatError) as error:

1634

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

1635

exc_info=error)

1636

return xmlstring

1637

1638

1031

1639

def datetime_to_dbus(dt, variant_level=0):

1032

1640

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

1033

1641

if dt is None:

1034

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

1035

return dbus.String(dt.isoformat(),

1036

variant_level=variant_level)

1642

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

1643

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

1037

1644

1038

1645

1039

1646

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1041

1648

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

1042

1649

interface names according to the "alt_interface_names" mapping.

1043

1650

Usage:

1044

1651

1045

1652

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

1046

1653

"net.example.AlternateInterface"})

1047

1654

class SampleDBusObject(dbus.service.Object):

1048

1655

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

1049

1656

def SampleDBusMethod():

1050

1657

pass

1051

1658

1052

1659

The above "SampleDBusMethod" on "SampleDBusObject" will be

1053

1660

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

1054

1661

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

1055

1662

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

1056

1663

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

1057

1664

1058

1665

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

1059

1666

(from DBusObjectWithProperties) and interfaces (from the

1060

1667

dbus_interface_annotations decorator).

1061

1668

"""

1669

1062

1670

def wrapper(cls):

1063

1671

for orig_interface_name, alt_interface_name in (

1064

alt_interface_names.items()):

1672

alt_interface_names.items()):

1065

1673

attr = {}

1066

1674

interface_names = set()

1067

1675

# Go though all attributes of the class

1069

1677

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

1070

1678

# with the wrong interface name

1071

1679

if (not hasattr(attribute, "_dbus_interface")

1072

or not attribute._dbus_interface

1073

.startswith(orig_interface_name)):

1680

or not attribute._dbus_interface.startswith(

1681

orig_interface_name)):

1074

1682

continue

1075

1683

# Create an alternate D-Bus interface name based on

1076

1684

# the current name

1077

alt_interface = (attribute._dbus_interface

1078

.replace(orig_interface_name,

1079

alt_interface_name))

1685

alt_interface = attribute._dbus_interface.replace(

1686

orig_interface_name, alt_interface_name)

1080

1687

interface_names.add(alt_interface)

1081

1688

# Is this a D-Bus signal?

1082

1689

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

1083

1690

# Extract the original non-method undecorated

1084

1691

# function by black magic

1085

nonmethod_func = (dict(

1692

if sys.version_info.major == 2:

1693

nonmethod_func = (dict(

1086

1694

zip(attribute.func_code.co_freevars,

1087

attribute.__closure__))["func"]

1088

.cell_contents)

1695

attribute.__closure__))

1696

["func"].cell_contents)

1697

else:

1698

nonmethod_func = (dict(

1699

zip(attribute.__code__.co_freevars,

1700

attribute.__closure__))

1701

["func"].cell_contents)

1089

1702

# Create a new, but exactly alike, function

1090

1703

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

1091

1704

# with the alternate D-Bus interface name

1092

new_function = (dbus.service.signal

1093

(alt_interface,

1094

attribute._dbus_signature)

1095

(types.FunctionType(

1096

nonmethod_func.func_code,

1097

nonmethod_func.func_globals,

1098

nonmethod_func.func_name,

1099

nonmethod_func.func_defaults,

1100

nonmethod_func.func_closure)))

1705

new_function = copy_function(nonmethod_func)

1706

new_function = (dbus.service.signal(

1707

alt_interface,

1708

attribute._dbus_signature)(new_function))

1101

1709

# Copy annotations, if any

1102

1710

try:

1103

new_function._dbus_annotations = (

1104

dict(attribute._dbus_annotations))

1711

new_function._dbus_annotations = dict(

1712

attribute._dbus_annotations)

1105

1713

except AttributeError:

1106

1714

pass

1715

1107

1716

# Define a creator of a function to call both the

1108

1717

# original and alternate functions, so both the

1109

1718

# original and alternate signals gets sent when

1112

1721

"""This function is a scope container to pass

1113

1722

func1 and func2 to the "call_both" function

1114

1723

outside of its arguments"""

1724

1725

@functools.wraps(func2)

1115

1726

def call_both(*args, **kwargs):

1116

1727

"""This function will emit two D-Bus

1117

1728

signals by calling func1 and func2"""

1118

1729

func1(*args, **kwargs)

1119

1730

func2(*args, **kwargs)

1731

# Make wrapper function look like a D-Bus

1732

# signal

1733

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

1734

if name.startswith("_dbus_"):

1735

setattr(call_both, name, attr)

1736

1120

1737

return call_both

1121

1738

# Create the "call_both" function and add it to

1122

1739

# the class

1127

1744

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

1128

1745

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

1129

1746

# to the class.

1130

attr[attrname] = (dbus.service.method

1131

(alt_interface,

1132

attribute._dbus_in_signature,

1133

attribute._dbus_out_signature)

1134

(types.FunctionType

1135

(attribute.func_code,

1136

attribute.func_globals,

1137

attribute.func_name,

1138

attribute.func_defaults,

1139

attribute.func_closure)))

1747

attr[attrname] = (

1748

dbus.service.method(

1749

alt_interface,

1750

attribute._dbus_in_signature,

1751

attribute._dbus_out_signature)

1752

(copy_function(attribute)))

1140

1753

# Copy annotations, if any

1141

1754

try:

1142

attr[attrname]._dbus_annotations = (

1143

dict(attribute._dbus_annotations))

1755

attr[attrname]._dbus_annotations = dict(

1756

attribute._dbus_annotations)

1144

1757

except AttributeError:

1145

1758

pass

1146

1759

# Is this a D-Bus property?

1149

1762

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

1150

1763

# property with the alternate D-Bus interface

1151

1764

# name. Add it to the class.

1152

attr[attrname] = (dbus_service_property

1153

(alt_interface,

1154

attribute._dbus_signature,

1155

attribute._dbus_access,

1156

attribute

1157

._dbus_get_args_options

1158

["byte_arrays"])

1159

(types.FunctionType

1160

(attribute.func_code,

1161

attribute.func_globals,

1162

attribute.func_name,

1163

attribute.func_defaults,

1164

attribute.func_closure)))

1765

attr[attrname] = (dbus_service_property(

1766

alt_interface, attribute._dbus_signature,

1767

attribute._dbus_access,

1768

attribute._dbus_get_args_options

1769

["byte_arrays"])

1770

(copy_function(attribute)))

1165

1771

# Copy annotations, if any

1166

1772

try:

1167

attr[attrname]._dbus_annotations = (

1168

dict(attribute._dbus_annotations))

1773

attr[attrname]._dbus_annotations = dict(

1774

attribute._dbus_annotations)

1169

1775

except AttributeError:

1170

1776

pass

1171

1777

# Is this a D-Bus interface?

1174

1780

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

1175

1781

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

1176

1782

# to the class.

1177

attr[attrname] = (dbus_interface_annotations

1178

(alt_interface)

1179

(types.FunctionType

1180

(attribute.func_code,

1181

attribute.func_globals,

1182

attribute.func_name,

1183

attribute.func_defaults,

1184

attribute.func_closure)))

1783

attr[attrname] = (

1784

dbus_interface_annotations(alt_interface)

1785

(copy_function(attribute)))

1185

1786

if deprecate:

1186

1787

# Deprecate all alternate interfaces

1187

iname="_AlternateDBusNames_interface_annotation{}"

1788

iname = "_AlternateDBusNames_interface_annotation{}"

1188

1789

for interface_name in interface_names:

1790

1189

1791

@dbus_interface_annotations(interface_name)

1190

1792

def func(self):

1191

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

1192

"true" }

1793

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

1794

"true"}

1193

1795

# Find an unused name

1194

1796

for aname in (iname.format(i)

1195

1797

for i in itertools.count()):

1199

1801

if interface_names:

1200

1802

# Replace the class with a new subclass of it with

1201

1803

# methods, signals, etc. as created above.

1202

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

1203

(cls,), attr)

1804

if sys.version_info.major == 2:

1805

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

1806

(cls, ), attr)

1807

else:

1808

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

1809

(cls, ), attr)

1204

1810

return cls

1811

1205

1812

return wrapper

1206

1813

1207

1814

1208

1815

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

1209

"se.bsnet.fukt.Mandos"})

1816

"se.bsnet.fukt.Mandos"})

1210

1817

class ClientDBus(Client, DBusObjectWithProperties):

1211

1818

"""A Client class using D-Bus

1212

1819

1213

1820

Attributes:

1214

1821

dbus_object_path: dbus.ObjectPath

1215

1822

bus: dbus.SystemBus()

1216

1823

"""

1217

1824

1218

1825

runtime_expansions = (Client.runtime_expansions

1219

+ ("dbus_object_path",))

1220

1826

+ ("dbus_object_path", ))

1827

1828

_interface = "se.recompile.Mandos.Client"

1829

1221

1830

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

1222

1223

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

1831

1832

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

1224

1833

self.bus = bus

1225

1834

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

1226

1835

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

1228

1837

client_object_name = str(self.name).translate(

1229

1838

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

1230

1839

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

1231

self.dbus_object_path = (dbus.ObjectPath

1232

("/clients/" + client_object_name))

1840

self.dbus_object_path = dbus.ObjectPath(

1841

"/clients/" + client_object_name)

1233

1842

DBusObjectWithProperties.__init__(self, self.bus,

1234

1843

self.dbus_object_path)

1235

1236

def notifychangeproperty(transform_func,

1237

dbus_name, type_func=lambda x: x,

1238

variant_level=1):

1844

1845

def notifychangeproperty(transform_func, dbus_name,

1846

type_func=lambda x: x,

1847

variant_level=1,

1848

invalidate_only=False,

1849

_interface=_interface):

1239

1850

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

1240

1851

its changes to DBus.

1241

1852

1242

1853

transform_fun: Function that takes a value and a variant_level

1243

1854

and transforms it to a D-Bus type.

1244

1855

dbus_name: D-Bus name of the variable

1247

1858

variant_level: D-Bus variant level. Default: 1

1248

1859

"""

1249

1860

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

1861

1250

1862

def setter(self, value):

1251

1863

if hasattr(self, "dbus_object_path"):

1252

1864

if (not hasattr(self, attrname) or

1253

1865

type_func(getattr(self, attrname, None))

1254

1866

!= type_func(value)):

1255

dbus_value = transform_func(type_func(value),

1256

variant_level

1257

=variant_level)

1258

self.PropertyChanged(dbus.String(dbus_name),

1259

dbus_value)

1867

if invalidate_only:

1868

self.PropertiesChanged(

1869

_interface, dbus.Dictionary(),

1870

dbus.Array((dbus_name, )))

1871

else:

1872

dbus_value = transform_func(

1873

type_func(value),

1874

variant_level=variant_level)

1875

self.PropertyChanged(dbus.String(dbus_name),

1876

dbus_value)

1877

self.PropertiesChanged(

1878

_interface,

1879

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

1880

dbus_value}),

1881

dbus.Array())

1260

1882

setattr(self, attrname, value)

1261

1883

1262

1884

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

1263

1885

1264

1886

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1265

1887

approvals_pending = notifychangeproperty(dbus.Boolean,

1266

1888

"ApprovalPending",

1267

type_func = bool)

1889

type_func=bool)

1268

1890

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

1269

1891

last_enabled = notifychangeproperty(datetime_to_dbus,

1270

1892

"LastEnabled")

1271

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

1272

type_func = lambda checker:

1273

checker is not None)

1893

checker = notifychangeproperty(

1894

dbus.Boolean, "CheckerRunning",

1895

type_func=lambda checker: checker is not None)

1274

1896

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1275

1897

"LastCheckedOK")

1276

1898

last_checker_status = notifychangeproperty(dbus.Int16,

1279

1901

datetime_to_dbus, "LastApprovalRequest")

1280

1902

approved_by_default = notifychangeproperty(dbus.Boolean,

1281

1903

"ApprovedByDefault")

1282

approval_delay = notifychangeproperty(dbus.UInt64,

1283

"ApprovalDelay",

1284

type_func =

1285

lambda td: td.total_seconds()

1286

* 1000)

1904

approval_delay = notifychangeproperty(

1905

dbus.UInt64, "ApprovalDelay",

1906

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

1287

1907

approval_duration = notifychangeproperty(

1288

1908

dbus.UInt64, "ApprovalDuration",

1289

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

1909

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

1290

1910

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

1291

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

1292

type_func = lambda td:

1293

td.total_seconds() * 1000)

1911

timeout = notifychangeproperty(

1912

dbus.UInt64, "Timeout",

1913

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

1294

1914

extended_timeout = notifychangeproperty(

1295

1915

dbus.UInt64, "ExtendedTimeout",

1296

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

1297

interval = notifychangeproperty(dbus.UInt64,

1298

"Interval",

1299

type_func =

1300

lambda td: td.total_seconds()

1301

* 1000)

1916

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

1917

interval = notifychangeproperty(

1918

dbus.UInt64, "Interval",

1919

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

1302

1920

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

1303

1921

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

1922

invalidate_only=True)

1923

1304

1924

del notifychangeproperty

1305

1925

1306

1926

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

1307

1927

try:

1308

1928

self.remove_from_connection()

1311

1931

if hasattr(DBusObjectWithProperties, "__del__"):

1312

1932

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

1313

1933

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

1314

1315

def checker_callback(self, pid, condition, command,

1316

*args, **kwargs):

1317

self.checker_callback_tag = None

1318

self.checker = None

1319

if os.WIFEXITED(condition):

1320

exitstatus = os.WEXITSTATUS(condition)

1934

1935

def checker_callback(self, source, condition,

1936

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

1937

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

1938

connection, command, *args,

1939

**kwargs)

1940

exitstatus = self.last_checker_status

1941

if exitstatus >= 0:

1321

1942

# Emit D-Bus signal

1322

1943

self.CheckerCompleted(dbus.Int16(exitstatus),

1323

dbus.Int64(condition),

1944

# This is specific to GNU libC

1945

dbus.Int64(exitstatus << 8),

1324

1946

dbus.String(command))

1325

1947

else:

1326

1948

# Emit D-Bus signal

1327

1949

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

1328

dbus.Int64(condition),

1950

dbus.Int64(

1951

# This is specific to GNU libC

1952

(exitstatus << 8)

1953

| self.last_checker_signal),

1329

1954

dbus.String(command))

1330

1331

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

1332

*args, **kwargs)

1333

1955

return ret

1956

1334

1957

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

1335

1958

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

1336

1959

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

1340

1963

# Emit D-Bus signal

1341

1964

self.CheckerStarted(self.current_checker_command)

1342

1965

return r

1343

1966

1344

1967

def _reset_approved(self):

1345

1968

self.approved = None

1346

1969

return False

1347

1970

1348

1971

def approve(self, value=True):

1349

1972

self.approved = value

1350

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

1351

* 1000), self._reset_approved)

1973

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

1974

* 1000), self._reset_approved)

1352

1975

self.send_changedstate()

1353

1354

## D-Bus methods, signals & properties

1355

_interface = "se.recompile.Mandos.Client"

1356

1357

## Interfaces

1358

1359

@dbus_interface_annotations(_interface)

1360

def _foo(self):

1361

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

1362

"false"}

1363

1364

## Signals

1365

1976

1977

# D-Bus methods, signals & properties

1978

1979

# Interfaces

1980

1981

# Signals

1982

1366

1983

# CheckerCompleted - signal

1367

1984

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

1368

1985

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

1369

1986

"D-Bus signal"

1370

1987

pass

1371

1988

1372

1989

# CheckerStarted - signal

1373

1990

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

1374

1991

def CheckerStarted(self, command):

1375

1992

"D-Bus signal"

1376

1993

pass

1377

1994

1378

1995

# PropertyChanged - signal

1996

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

1379

1997

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

1380

1998

def PropertyChanged(self, property, value):

1381

1999

"D-Bus signal"

1382

2000

pass

1383

2001

1384

2002

# GotSecret - signal

1385

2003

@dbus.service.signal(_interface)

1386

2004

def GotSecret(self):

1389

2007

server to mandos-client

1390

2008

"""

1391

2009

pass

1392

2010

1393

2011

# Rejected - signal

1394

2012

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

1395

2013

def Rejected(self, reason):

1396

2014

"D-Bus signal"

1397

2015

pass

1398

2016

1399

2017

# NeedApproval - signal

1400

2018

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

1401

2019

def NeedApproval(self, timeout, default):

1402

2020

"D-Bus signal"

1403

2021

return self.need_approval()

1404

1405

## Methods

1406

2022

2023

# Methods

2024

1407

2025

# Approve - method

1408

2026

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

1409

2027

def Approve(self, value):

1410

2028

self.approve(value)

1411

2029

1412

2030

# CheckedOK - method

1413

2031

@dbus.service.method(_interface)

1414

2032

def CheckedOK(self):

1415

2033

self.checked_ok()

1416

2034

1417

2035

# Enable - method

2036

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

1418

2037

@dbus.service.method(_interface)

1419

2038

def Enable(self):

1420

2039

"D-Bus method"

1421

2040

self.enable()

1422

2041

1423

2042

# StartChecker - method

2043

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

1424

2044

@dbus.service.method(_interface)

1425

2045

def StartChecker(self):

1426

2046

"D-Bus method"

1427

2047

self.start_checker()

1428

2048

1429

2049

# Disable - method

2050

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

1430

2051

@dbus.service.method(_interface)

1431

2052

def Disable(self):

1432

2053

"D-Bus method"

1433

2054

self.disable()

1434

2055

1435

2056

# StopChecker - method

2057

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

1436

2058

@dbus.service.method(_interface)

1437

2059

def StopChecker(self):

1438

2060

self.stop_checker()

1439

1440

## Properties

1441

2061

2062

# Properties

2063

1442

2064

# ApprovalPending - property

1443

2065

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

1444

2066

def ApprovalPending_dbus_property(self):

1445

2067

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

1446

2068

1447

2069

# ApprovedByDefault - property

1448

@dbus_service_property(_interface, signature="b",

2070

@dbus_service_property(_interface,

2071

signature="b",

1449

2072

access="readwrite")

1450

2073

def ApprovedByDefault_dbus_property(self, value=None):

1451

2074

if value is None: # get

1452

2075

return dbus.Boolean(self.approved_by_default)

1453

2076

self.approved_by_default = bool(value)

1454

2077

1455

2078

# ApprovalDelay - property

1456

@dbus_service_property(_interface, signature="t",

2079

@dbus_service_property(_interface,

2080

signature="t",

1457

2081

access="readwrite")

1458

2082

def ApprovalDelay_dbus_property(self, value=None):

1459

2083

if value is None: # get

1460

2084

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

1461

2085

* 1000)

1462

2086

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

1463

2087

1464

2088

# ApprovalDuration - property

1465

@dbus_service_property(_interface, signature="t",

2089

@dbus_service_property(_interface,

2090

signature="t",

1466

2091

access="readwrite")

1467

2092

def ApprovalDuration_dbus_property(self, value=None):

1468

2093

if value is None: # get

1469

2094

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

1470

2095

* 1000)

1471

2096

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

1472

2097

1473

2098

# Name - property

2099

@dbus_annotations(

2100

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

1474

2101

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

1475

2102

def Name_dbus_property(self):

1476

2103

return dbus.String(self.name)

1477

2104

2105

# KeyID - property

2106

@dbus_annotations(

2107

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

2108

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

2109

def KeyID_dbus_property(self):

2110

return dbus.String(self.key_id)

2111

1478

2112

# Fingerprint - property

2113

@dbus_annotations(

2114

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

1479

2115

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

1480

2116

def Fingerprint_dbus_property(self):

1481

2117

return dbus.String(self.fingerprint)

1482

2118

1483

2119

# Host - property

1484

@dbus_service_property(_interface, signature="s",

2120

@dbus_service_property(_interface,

2121

signature="s",

1485

2122

access="readwrite")

1486

2123

def Host_dbus_property(self, value=None):

1487

2124

if value is None: # get

1488

2125

return dbus.String(self.host)

1489

2126

self.host = str(value)

1490

2127

1491

2128

# Created - property

2129

@dbus_annotations(

2130

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

1492

2131

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

1493

2132

def Created_dbus_property(self):

1494

2133

return datetime_to_dbus(self.created)

1495

2134

1496

2135

# LastEnabled - property

1497

2136

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

1498

2137

def LastEnabled_dbus_property(self):

1499

2138

return datetime_to_dbus(self.last_enabled)

1500

2139

1501

2140

# Enabled - property

1502

@dbus_service_property(_interface, signature="b",

2141

@dbus_service_property(_interface,

2142

signature="b",

1503

2143

access="readwrite")

1504

2144

def Enabled_dbus_property(self, value=None):

1505

2145

if value is None: # get

1508

2148

self.enable()

1509

2149

else:

1510

2150

self.disable()

1511

2151

1512

2152

# LastCheckedOK - property

1513

@dbus_service_property(_interface, signature="s",

2153

@dbus_service_property(_interface,

2154

signature="s",

1514

2155

access="readwrite")

1515

2156

def LastCheckedOK_dbus_property(self, value=None):

1516

2157

if value is not None:

1517

2158

self.checked_ok()

1518

2159

return

1519

2160

return datetime_to_dbus(self.last_checked_ok)

1520

2161

1521

2162

# LastCheckerStatus - property

1522

@dbus_service_property(_interface, signature="n",

1523

access="read")

2163

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

1524

2164

def LastCheckerStatus_dbus_property(self):

1525

2165

return dbus.Int16(self.last_checker_status)

1526

2166

1527

2167

# Expires - property

1528

2168

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

1529

2169

def Expires_dbus_property(self):

1530

2170

return datetime_to_dbus(self.expires)

1531

2171

1532

2172

# LastApprovalRequest - property

1533

2173

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

1534

2174

def LastApprovalRequest_dbus_property(self):

1535

2175

return datetime_to_dbus(self.last_approval_request)

1536

2176

1537

2177

# Timeout - property

1538

@dbus_service_property(_interface, signature="t",

2178

@dbus_service_property(_interface,

2179

signature="t",

1539

2180

access="readwrite")

1540

2181

def Timeout_dbus_property(self, value=None):

1541

2182

if value is None: # get

1553

2194

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

1554

2195

is None):

1555

2196

return

1556

gobject.source_remove(self.disable_initiator_tag)

1557

self.disable_initiator_tag = (

1558

gobject.timeout_add(

1559

int((self.expires - now).total_seconds()

1560

* 1000), self.disable))

1561

2197

GLib.source_remove(self.disable_initiator_tag)

2198

self.disable_initiator_tag = GLib.timeout_add(

2199

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

2200

self.disable)

2201

1562

2202

# ExtendedTimeout - property

1563

@dbus_service_property(_interface, signature="t",

2203

@dbus_service_property(_interface,

2204

signature="t",

1564

2205

access="readwrite")

1565

2206

def ExtendedTimeout_dbus_property(self, value=None):

1566

2207

if value is None: # get

1567

2208

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

1568

2209

* 1000)

1569

2210

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

1570

2211

1571

2212

# Interval - property

1572

@dbus_service_property(_interface, signature="t",

2213

@dbus_service_property(_interface,

2214

signature="t",

1573

2215

access="readwrite")

1574

2216

def Interval_dbus_property(self, value=None):

1575

2217

if value is None: # get

1579

2221

return

1580

2222

if self.enabled:

1581

2223

# Reschedule checker run

1582

gobject.source_remove(self.checker_initiator_tag)

1583

self.checker_initiator_tag = (gobject.timeout_add

1584

(value, self.start_checker))

1585

self.start_checker() # Start one now, too

1586

2224

GLib.source_remove(self.checker_initiator_tag)

2225

self.checker_initiator_tag = GLib.timeout_add(

2226

value, self.start_checker)

2227

self.start_checker() # Start one now, too

2228

1587

2229

# Checker - property

1588

@dbus_service_property(_interface, signature="s",

2230

@dbus_service_property(_interface,

2231

signature="s",

1589

2232

access="readwrite")

1590

2233

def Checker_dbus_property(self, value=None):

1591

2234

if value is None: # get

1592

2235

return dbus.String(self.checker_command)

1593

2236

self.checker_command = str(value)

1594

2237

1595

2238

# CheckerRunning - property

1596

@dbus_service_property(_interface, signature="b",

2239

@dbus_service_property(_interface,

2240

signature="b",

1597

2241

access="readwrite")

1598

2242

def CheckerRunning_dbus_property(self, value=None):

1599

2243

if value is None: # get

1602

2246

self.start_checker()

1603

2247

else:

1604

2248

self.stop_checker()

1605

2249

1606

2250

# ObjectPath - property

2251

@dbus_annotations(

2252

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

2253

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

1607

2254

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

1608

2255

def ObjectPath_dbus_property(self):

1609

return self.dbus_object_path # is already a dbus.ObjectPath

1610

2256

return self.dbus_object_path # is already a dbus.ObjectPath

2257

1611

2258

# Secret = property

1612

@dbus_service_property(_interface, signature="ay",

1613

access="write", byte_arrays=True)

2259

@dbus_annotations(

2260

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

2261

"invalidates"})

2262

@dbus_service_property(_interface,

2263

signature="ay",

2264

access="write",

2265

byte_arrays=True)

1614

2266

def Secret_dbus_property(self, value):

1615

2267

self.secret = bytes(value)

1616

2268

1617

2269

del _interface

1618

2270

1619

2271

1620

class ProxyClient(object):

1621

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

2272

class ProxyClient:

2273

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

1622

2274

self._pipe = child_pipe

1623

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

2275

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

1624

2276

if not self._pipe.recv():

1625

raise KeyError()

1626

2277

raise KeyError(key_id or fpr)

2278

1627

2279

def __getattribute__(self, name):

1628

if name == '_pipe':

2280

if name == "_pipe":

1629

2281

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

1630

self._pipe.send(('getattr', name))

2282

self._pipe.send(("getattr", name))

1631

2283

data = self._pipe.recv()

1632

if data[0] == 'data':

2284

if data[0] == "data":

1633

2285

return data[1]

1634

if data[0] == 'function':

2286

if data[0] == "function":

2287

1635

2288

def func(*args, **kwargs):

1636

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

2289

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

1637

2290

return self._pipe.recv()[1]

2291

1638

2292

return func

1639

2293

1640

2294

def __setattr__(self, name, value):

1641

if name == '_pipe':

2295

if name == "_pipe":

1642

2296

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

1643

self._pipe.send(('setattr', name, value))

2297

self._pipe.send(("setattr", name, value))

1644

2298

1645

2299

1646

2300

class ClientHandler(socketserver.BaseRequestHandler, object):

1647

2301

"""A class to handle client connections.

1648

2302

1649

2303

Instantiated once for each connection to handle it.

1650

2304

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

1651

2305

1652

2306

def handle(self):

1653

2307

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

1654

2308

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

1655

2309

str(self.client_address))

1656

2310

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

1657

2311

self.server.child_pipe.fileno())

1658

1659

session = (gnutls.connection

1660

.ClientSession(self.request,

1661

gnutls.connection

1662

.X509Credentials()))

1663

1664

# Note: gnutls.connection.X509Credentials is really a

1665

# generic GnuTLS certificate credentials object so long as

1666

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

1667

# here despite using OpenPGP certificates.

1668

1669

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

1670

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

1671

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

1672

# "+DHE-DSS"))

2312

2313

session = gnutls.ClientSession(self.request)

2314

2315

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

2316

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

2317

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

2318

# "+DHE-DSS"))

1673

2319

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

1674

2320

priority = self.server.gnutls_priority

1675

2321

if priority is None:

1676

2322

priority = "NORMAL"

1677

(gnutls.library.functions

1678

.gnutls_priority_set_direct(session._c_object,

1679

priority, None))

1680

2323

gnutls.priority_set_direct(session,

2324

priority.encode("utf-8"), None)

2325

1681

2326

# Start communication using the Mandos protocol

1682

2327

# Get protocol number

1683

2328

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

1688

2333

except (ValueError, IndexError, RuntimeError) as error:

1689

2334

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

1690

2335

return

1691

2336

1692

2337

# Start GnuTLS connection

1693

2338

try:

1694

2339

session.handshake()

1695

except gnutls.errors.GNUTLSError as error:

2340

except gnutls.Error as error:

1696

2341

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

1697

2342

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

1698

2343

# established. Just abandon the request.

1699

2344

return

1700

2345

logger.debug("Handshake succeeded")

1701

2346

1702

2347

approval_required = False

1703

2348

try:

1704

try:

1705

fpr = self.fingerprint(self.peer_certificate

1706

(session))

1707

except (TypeError,

1708

gnutls.errors.GNUTLSError) as error:

1709

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

1710

return

1711

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

1712

1713

try:

1714

client = ProxyClient(child_pipe, fpr,

2349

if gnutls.has_rawpk:

2350

fpr = b""

2351

try:

2352

key_id = self.key_id(

2353

self.peer_certificate(session))

2354

except (TypeError, gnutls.Error) as error:

2355

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

2356

return

2357

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

2358

key_id.decode("utf-8",

2359

errors="replace"))

2360

2361

else:

2362

key_id = b""

2363

try:

2364

fpr = self.fingerprint(

2365

self.peer_certificate(session))

2366

except (TypeError, gnutls.Error) as error:

2367

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

2368

return

2369

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

2370

2371

try:

2372

client = ProxyClient(child_pipe, key_id, fpr,

1715

2373

self.client_address)

1716

2374

except KeyError:

1717

2375

return

1718

2376

1719

2377

if client.approval_delay:

1720

2378

delay = client.approval_delay

1721

2379

client.approvals_pending += 1

1722

2380

approval_required = True

1723

2381

1724

2382

while True:

1725

2383

if not client.enabled:

1726

2384

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

1727

client.name)

2385

client.name)

1728

2386

if self.server.use_dbus:

1729

2387

# Emit D-Bus signal

1730

2388

client.Rejected("Disabled")

1731

2389

return

1732

2390

1733

2391

if client.approved or not client.approval_delay:

1734

#We are approved or approval is disabled

2392

# We are approved or approval is disabled

1735

2393

break

1736

2394

elif client.approved is None:

1737

2395

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

1748

2406

# Emit D-Bus signal

1749

2407

client.Rejected("Denied")

1750

2408

return

1751

1752

#wait until timeout or approved

2409

2410

# wait until timeout or approved

1753

2411

time = datetime.datetime.now()

1754

2412

client.changedstate.acquire()

1755

2413

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

1768

2426

break

1769

2427

else:

1770

2428

delay -= time2 - time

1771

1772

sent_size = 0

1773

while sent_size < len(client.secret):

1774

try:

1775

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

1776

except gnutls.errors.GNUTLSError as error:

1777

logger.warning("gnutls send failed",

1778

exc_info=error)

1779

return

1780

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

1781

sent, len(client.secret)

1782

- (sent_size + sent))

1783

sent_size += sent

1784

2429

2430

try:

2431

session.send(client.secret)

2432

except gnutls.Error as error:

2433

logger.warning("gnutls send failed",

2434

exc_info=error)

2435

return

2436

1785

2437

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

1786

2438

# bump the timeout using extended_timeout

1787

2439

client.bump_timeout(client.extended_timeout)

1788

2440

if self.server.use_dbus:

1789

2441

# Emit D-Bus signal

1790

2442

client.GotSecret()

1791

2443

1792

2444

finally:

1793

2445

if approval_required:

1794

2446

client.approvals_pending -= 1

1795

2447

try:

1796

2448

session.bye()

1797

except gnutls.errors.GNUTLSError as error:

2449

except gnutls.Error as error:

1798

2450

logger.warning("GnuTLS bye failed",

1799

2451

exc_info=error)

1800

2452

1801

2453

@staticmethod

1802

2454

def peer_certificate(session):

1803

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

1804

# If not an OpenPGP certificate...

1805

if (gnutls.library.functions

1806

.gnutls_certificate_type_get(session._c_object)

1807

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1808

# ...do the normal thing

1809

return session.peer_certificate

2455

"Return the peer's certificate as a bytestring"

2456

try:

2457

cert_type = gnutls.certificate_type_get2(

2458

session, gnutls.CTYPE_PEERS)

2459

except AttributeError:

2460

cert_type = gnutls.certificate_type_get(session)

2461

if gnutls.has_rawpk:

2462

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2463

else:

2464

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2465

# If not a valid certificate type...

2466

if cert_type not in valid_cert_types:

2467

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

2468

valid_cert_types)

2469

# ...return invalid data

2470

return b""

1810

2471

list_size = ctypes.c_uint(1)

1811

cert_list = (gnutls.library.functions

1812

.gnutls_certificate_get_peers

1813

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

2472

cert_list = (gnutls.certificate_get_peers

2473

(session, ctypes.byref(list_size)))

1814

2474

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

1815

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

1816

" certificate")

2475

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

1817

2476

if list_size.value == 0:

1818

2477

return None

1819

2478

cert = cert_list[0]

1820

2479

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

1821

2480

2481

@staticmethod

2482

def key_id(certificate):

2483

"Convert a certificate bytestring to a hexdigit key ID"

2484

# New GnuTLS "datum" with the public key

2485

datum = gnutls.datum_t(

2486

ctypes.cast(ctypes.c_char_p(certificate),

2487

ctypes.POINTER(ctypes.c_ubyte)),

2488

ctypes.c_uint(len(certificate)))

2489

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

2490

# New empty GnuTLS certificate

2491

pubkey = gnutls.pubkey_t()

2492

gnutls.pubkey_init(ctypes.byref(pubkey))

2493

# Import the raw public key into the certificate

2494

gnutls.pubkey_import(pubkey,

2495

ctypes.byref(datum),

2496

gnutls.X509_FMT_DER)

2497

# New buffer for the key ID

2498

buf = ctypes.create_string_buffer(32)

2499

buf_len = ctypes.c_size_t(len(buf))

2500

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

2501

gnutls.pubkey_get_key_id(

2502

pubkey,

2503

gnutls.KEYID_USE_SHA256,

2504

ctypes.cast(ctypes.byref(buf),

2505

ctypes.POINTER(ctypes.c_ubyte)),

2506

ctypes.byref(buf_len))

2507

# Deinit the certificate

2508

gnutls.pubkey_deinit(pubkey)

2509

2510

# Convert the buffer to a Python bytestring

2511

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

2512

# Convert the bytestring to hexadecimal notation

2513

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

2514

return hex_key_id

2515

1822

2516

@staticmethod

1823

2517

def fingerprint(openpgp):

1824

2518

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1825

2519

# New GnuTLS "datum" with the OpenPGP public key

1826

datum = (gnutls.library.types

1827

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

1828

ctypes.POINTER

1829

(ctypes.c_ubyte)),

1830

ctypes.c_uint(len(openpgp))))

2520

datum = gnutls.datum_t(

2521

ctypes.cast(ctypes.c_char_p(openpgp),

2522

ctypes.POINTER(ctypes.c_ubyte)),

2523

ctypes.c_uint(len(openpgp)))

1831

2524

# New empty GnuTLS certificate

1832

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1833

(gnutls.library.functions

1834

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2525

crt = gnutls.openpgp_crt_t()

2526

gnutls.openpgp_crt_init(ctypes.byref(crt))

1835

2527

# Import the OpenPGP public key into the certificate

1836

(gnutls.library.functions

1837

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

1838

gnutls.library.constants

1839

.GNUTLS_OPENPGP_FMT_RAW))

2528

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

2529

gnutls.OPENPGP_FMT_RAW)

1840

2530

# Verify the self signature in the key

1841

2531

crtverify = ctypes.c_uint()

1842

(gnutls.library.functions

1843

.gnutls_openpgp_crt_verify_self(crt, 0,

1844

ctypes.byref(crtverify)))

2532

gnutls.openpgp_crt_verify_self(crt, 0,

2533

ctypes.byref(crtverify))

1845

2534

if crtverify.value != 0:

1846

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1847

raise (gnutls.errors.CertificateSecurityError

1848

("Verify failed"))

2535

gnutls.openpgp_crt_deinit(crt)

2536

raise gnutls.CertificateSecurityError(code

2537

=crtverify.value)

1849

2538

# New buffer for the fingerprint

1850

2539

buf = ctypes.create_string_buffer(20)

1851

2540

buf_len = ctypes.c_size_t()

1852

2541

# Get the fingerprint from the certificate into the buffer

1853

(gnutls.library.functions

1854

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

1855

ctypes.byref(buf_len)))

2542

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

2543

ctypes.byref(buf_len))

1856

2544

# Deinit the certificate

1857

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2545

gnutls.openpgp_crt_deinit(crt)

1858

2546

# Convert the buffer to a Python bytestring

1859

2547

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

1860

2548

# Convert the bytestring to hexadecimal notation

1862

2550

return hex_fpr

1863

2551

1864

2552

1865

class MultiprocessingMixIn(object):

2553

class MultiprocessingMixIn:

1866

2554

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

2555

1867

2556

def sub_process_main(self, request, address):

1868

2557

try:

1869

2558

self.finish_request(request, address)

1870

2559

except Exception:

1871

2560

self.handle_error(request, address)

1872

2561

self.close_request(request)

1873

2562

1874

2563

def process_request(self, request, address):

1875

2564

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

1876

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

1877

args = (request, address))

2565

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

2566

args=(request, address))

1878

2567

proc.start()

1879

2568

return proc

1880

2569

1881

2570

1882

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2571

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

1883

2572

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

2573

1884

2574

def process_request(self, request, client_address):

1885

2575

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

1886

2576

1887

2577

This function creates a new pipe in self.pipe

1888

2578

"""

1889

2579

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1890

2580

1891

2581

proc = MultiprocessingMixIn.process_request(self, request,

1892

2582

client_address)

1893

2583

self.child_pipe.close()

1894

2584

self.add_pipe(parent_pipe, proc)

1895

2585

1896

2586

def add_pipe(self, parent_pipe, proc):

1897

2587

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

1898

2588

raise NotImplementedError()

1899

2589

1900

2590

1901

2591

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1902

socketserver.TCPServer, object):

1903

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

1904

2592

socketserver.TCPServer):

2593

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

2594

1905

2595

Attributes:

1906

2596

enabled: Boolean; whether this server is activated yet

1907

2597

interface: None or a network interface name (string)

1908

2598

use_ipv6: Boolean; to use IPv6 or not

1909

2599

"""

2600

1910

2601

def __init__(self, server_address, RequestHandlerClass,

1911

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

2602

interface=None,

2603

use_ipv6=True,

2604

socketfd=None):

1912

2605

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

1913

2606

creating a new one with socket.socket().

1914

2607

"""

1920

2613

self.socketfd = socketfd

1921

2614

# Save the original socket.socket() function

1922

2615

self.socket_socket = socket.socket

2616

1923

2617

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

1924

#

2618

#

1925

2619

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

1926

2620

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

1927

2621

# patching socket.socket.)

1928

#

2622

#

1929

2623

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

1930

2624

@functools.wraps(socket.socket)

1931

2625

def socket_wrapper(*args, **kwargs):

1943

2637

# socket_wrapper(), if socketfd was set.

1944

2638

socketserver.TCPServer.__init__(self, server_address,

1945

2639

RequestHandlerClass)

1946

2640

1947

2641

def server_bind(self):

1948

2642

"""This overrides the normal server_bind() function

1949

2643

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

1950

2644

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

2645

global SO_BINDTODEVICE

1951

2646

if self.interface is not None:

1952

2647

if SO_BINDTODEVICE is None:

1953

logger.error("SO_BINDTODEVICE does not exist;"

1954

" cannot bind to interface %s",

1955

self.interface)

1956

else:

1957

try:

1958

self.socket.setsockopt(socket.SOL_SOCKET,

1959

SO_BINDTODEVICE,

1960

(self.interface + "\0")

1961

.encode("utf-8"))

1962

except socket.error as error:

1963

if error.errno == errno.EPERM:

1964

logger.error("No permission to bind to"

1965

" interface %s", self.interface)

1966

elif error.errno == errno.ENOPROTOOPT:

1967

logger.error("SO_BINDTODEVICE not available;"

1968

" cannot bind to interface %s",

1969

self.interface)

1970

elif error.errno == errno.ENODEV:

1971

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

1972

" cannot bind", self.interface)

1973

else:

1974

raise

2648

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

2649

# common enough.

2650

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

2651

SO_BINDTODEVICE = 25

2652

try:

2653

self.socket.setsockopt(

2654

socket.SOL_SOCKET, SO_BINDTODEVICE,

2655

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

2656

except socket.error as error:

2657

if error.errno == errno.EPERM:

2658

logger.error("No permission to bind to"

2659

" interface %s", self.interface)

2660

elif error.errno == errno.ENOPROTOOPT:

2661

logger.error("SO_BINDTODEVICE not available;"

2662

" cannot bind to interface %s",

2663

self.interface)

2664

elif error.errno == errno.ENODEV:

2665

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

2666

" cannot bind", self.interface)

2667

else:

2668

raise

1975

2669

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

1976

2670

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

2671

if self.server_address[1]:

2672

self.allow_reuse_address = True

1977

2673

if not self.server_address[0]:

1978

2674

if self.address_family == socket.AF_INET6:

1979

any_address = "::" # in6addr_any

2675

any_address = "::" # in6addr_any

1980

2676

else:

1981

any_address = "0.0.0.0" # INADDR_ANY

2677

any_address = "0.0.0.0" # INADDR_ANY

1982

2678

self.server_address = (any_address,

1983

2679

self.server_address[1])

1984

2680

elif not self.server_address[1]:

1985

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

1986

0)

2681

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

1987

2682

# if self.interface:

1988

2683

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

1989

2684

# 0, # port

1995

2690

1996

2691

class MandosServer(IPv6_TCPServer):

1997

2692

"""Mandos server.

1998

2693

1999

2694

Attributes:

2000

2695

clients: set of Client objects

2001

2696

gnutls_priority GnuTLS priority string

2002

2697

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

2003

2004

Assumes a gobject.MainLoop event loop.

2698

2699

Assumes a GLib.MainLoop event loop.

2005

2700

"""

2701

2006

2702

def __init__(self, server_address, RequestHandlerClass,

2007

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

2008

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

2703

interface=None,

2704

use_ipv6=True,

2705

clients=None,

2706

gnutls_priority=None,

2707

use_dbus=True,

2708

socketfd=None):

2009

2709

self.enabled = False

2010

2710

self.clients = clients

2011

2711

if self.clients is None:

2014

2714

self.gnutls_priority = gnutls_priority

2015

2715

IPv6_TCPServer.__init__(self, server_address,

2016

2716

RequestHandlerClass,

2017

interface = interface,

2018

use_ipv6 = use_ipv6,

2019

socketfd = socketfd)

2717

interface=interface,

2718

use_ipv6=use_ipv6,

2719

socketfd=socketfd)

2720

2020

2721

def server_activate(self):

2021

2722

if self.enabled:

2022

2723

return socketserver.TCPServer.server_activate(self)

2023

2724

2024

2725

def enable(self):

2025

2726

self.enabled = True

2026

2727

2027

2728

def add_pipe(self, parent_pipe, proc):

2028

2729

# Call "handle_ipc" for both data and EOF events

2029

gobject.io_add_watch(parent_pipe.fileno(),

2030

gobject.IO_IN | gobject.IO_HUP,

2031

functools.partial(self.handle_ipc,

2032

parent_pipe =

2033

parent_pipe,

2034

proc = proc))

2035

2036

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

2037

proc = None, client_object=None):

2730

GLib.io_add_watch(

2731

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

2732

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

2733

functools.partial(self.handle_ipc,

2734

parent_pipe=parent_pipe,

2735

proc=proc))

2736

2737

def handle_ipc(self, source, condition,

2738

parent_pipe=None,

2739

proc=None,

2740

client_object=None):

2038

2741

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

2039

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

2742

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

2040

2743

# Wait for other process to exit

2041

2744

proc.join()

2042

2745

return False

2043

2746

2044

2747

# Read a request from the child

2045

2748

request = parent_pipe.recv()

2046

2749

command = request[0]

2047

2048

if command == 'init':

2049

fpr = request[1]

2050

address = request[2]

2051

2052

for c in self.clients.itervalues():

2053

if c.fingerprint == fpr:

2750

2751

if command == "init":

2752

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

2753

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

2754

address = request[3]

2755

2756

for c in self.clients.values():

2757

if key_id == ("E3B0C44298FC1C149AFBF4C8996FB924"

2758

"27AE41E4649B934CA495991B7852B855"):

2759

continue

2760

if key_id and c.key_id == key_id:

2761

client = c

2762

break

2763

if fpr and c.fingerprint == fpr:

2054

2764

client = c

2055

2765

break

2056

2766

else:

2057

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

2058

"dress: %s", fpr, address)

2767

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

2768

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

2059

2769

if self.use_dbus:

2060

2770

# Emit D-Bus signal

2061

mandos_dbus_service.ClientNotFound(fpr,

2771

mandos_dbus_service.ClientNotFound(key_id or fpr,

2062

2772

address[0])

2063

2773

parent_pipe.send(False)

2064

2774

return False

2065

2066

gobject.io_add_watch(parent_pipe.fileno(),

2067

gobject.IO_IN | gobject.IO_HUP,

2068

functools.partial(self.handle_ipc,

2069

parent_pipe =

2070

parent_pipe,

2071

proc = proc,

2072

client_object =

2073

client))

2775

2776

GLib.io_add_watch(

2777

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

2778

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

2779

functools.partial(self.handle_ipc,

2780

parent_pipe=parent_pipe,

2781

proc=proc,

2782

client_object=client))

2074

2783

parent_pipe.send(True)

2075

2784

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

2076

2785

# same fileno

2077

2786

return False

2078

if command == 'funcall':

2787

if command == "funcall":

2079

2788

funcname = request[1]

2080

2789

args = request[2]

2081

2790

kwargs = request[3]

2082

2083

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

2791

2792

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

2084

2793

funcname)(*args,

2085

**kwargs)))

2086

2087

if command == 'getattr':

2794

**kwargs)))

2795

2796

if command == "getattr":

2088

2797

attrname = request[1]

2089

if callable(client_object.__getattribute__(attrname)):

2090

parent_pipe.send(('function',))

2798

if isinstance(client_object.__getattribute__(attrname),

2799

collections.abc.Callable):

2800

parent_pipe.send(("function", ))

2091

2801

else:

2092

parent_pipe.send(('data', client_object

2093

.__getattribute__(attrname)))

2094

2095

if command == 'setattr':

2802

parent_pipe.send((

2803

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

2804

2805

if command == "setattr":

2096

2806

attrname = request[1]

2097

2807

value = request[2]

2098

2808

setattr(client_object, attrname, value)

2099

2809

2100

2810

return True

2101

2811

2102

2812

2103

2813

def rfc3339_duration_to_delta(duration):

2104

2814

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

2105

2106

>>> rfc3339_duration_to_delta("P7D")

2107

datetime.timedelta(7)

2108

>>> rfc3339_duration_to_delta("PT60S")

2109

datetime.timedelta(0, 60)

2110

>>> rfc3339_duration_to_delta("PT60M")

2111

datetime.timedelta(0, 3600)

2112

>>> rfc3339_duration_to_delta("PT24H")

2113

datetime.timedelta(1)

2114

>>> rfc3339_duration_to_delta("P1W")

2115

datetime.timedelta(7)

2116

>>> rfc3339_duration_to_delta("PT5M30S")

2117

datetime.timedelta(0, 330)

2118

>>> rfc3339_duration_to_delta("P1DT3M20S")

2119

datetime.timedelta(1, 200)

2815

2816

>>> timedelta = datetime.timedelta

2817

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

2818

True

2819

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

2820

True

2821

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

2822

True

2823

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

2824

True

2825

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

2826

True

2827

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

2828

True

2829

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

2830

True

2831

>>> del timedelta

2120

2832

"""

2121

2833

2122

2834

# Parsing an RFC 3339 duration with regular expressions is not

2123

2835

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

2124

2836

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

2125

2837

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

2126

2838

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

2127

2839

# avoid excessive use of external libraries.

2128

2840

2129

2841

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

2130

Token = collections.namedtuple("Token",

2131

("regexp", # To match token; if

2132

# "value" is not None,

2133

# must have a "group"

2134

# containing digits

2135

"value", # datetime.timedelta or

2136

# None

2137

"followers")) # Tokens valid after

2138

# this token

2842

Token = collections.namedtuple("Token", (

2843

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

2844

# a "group" containing digits

2845

"value", # datetime.timedelta or None

2846

"followers")) # Tokens valid after this token

2139

2847

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

2140

2848

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

2141

2849

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

2142

2850

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

2143

2851

datetime.timedelta(seconds=1),

2144

frozenset((token_end,)))

2852

frozenset((token_end, )))

2145

2853

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

2146

2854

datetime.timedelta(minutes=1),

2147

2855

frozenset((token_second, token_end)))

2163

2871

frozenset((token_month, token_end)))

2164

2872

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

2165

2873

datetime.timedelta(weeks=1),

2166

frozenset((token_end,)))

2874

frozenset((token_end, )))

2167

2875

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

2168

2876

frozenset((token_year, token_month,

2169

2877

token_day, token_time,

2170

2878

token_week)))

2171

# Define starting values

2172

value = datetime.timedelta() # Value so far

2879

# Define starting values:

2880

# Value so far

2881

value = datetime.timedelta()

2173

2882

found_token = None

2174

followers = frozenset((token_duration,)) # Following valid tokens

2175

s = duration # String left to parse

2883

# Following valid tokens

2884

followers = frozenset((token_duration, ))

2885

# String left to parse

2886

s = duration

2176

2887

# Loop until end token is found

2177

2888

while found_token is not token_end:

2178

2889

# Search for any currently valid tokens

2194

2905

break

2195

2906

else:

2196

2907

# No currently valid tokens were found

2197

raise ValueError("Invalid RFC 3339 duration")

2908

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

2909

.format(duration))

2198

2910

# End token found

2199

2911

return value

2200

2912

2201

2913

2202

2914

def string_to_delta(interval):

2203

2915

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

2204

2205

>>> string_to_delta('7d')

2206

datetime.timedelta(7)

2207

>>> string_to_delta('60s')

2208

datetime.timedelta(0, 60)

2209

>>> string_to_delta('60m')

2210

datetime.timedelta(0, 3600)

2211

>>> string_to_delta('24h')

2212

datetime.timedelta(1)

2213

>>> string_to_delta('1w')

2214

datetime.timedelta(7)

2215

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

2216

datetime.timedelta(0, 330)

2916

2917

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

2918

True

2919

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

2920

True

2921

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

2922

True

2923

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

2924

True

2925

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

2926

True

2927

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

2928

True

2217

2929

"""

2218

2930

2219

2931

try:

2220

2932

return rfc3339_duration_to_delta(interval)

2221

2933

except ValueError:

2222

2934

pass

2223

2935

2224

2936

timevalue = datetime.timedelta(0)

2225

2937

for s in interval.split():

2226

2938

try:

2237

2949

elif suffix == "w":

2238

2950

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

2239

2951

else:

2240

raise ValueError("Unknown suffix {!r}"

2241

.format(suffix))

2952

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

2242

2953

except IndexError as e:

2243

2954

raise ValueError(*(e.args))

2244

2955

timevalue += delta

2245

2956

return timevalue

2246

2957

2247

2958

2248

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

2959

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

2249

2960

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

2250

2961

2251

2962

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

2252

2963

if os.fork():

2253

2964

sys.exit()

2260

2971

# Close all standard open file descriptors

2261

2972

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

2262

2973

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

2263

raise OSError(errno.ENODEV, "{} not a character device"

2974

raise OSError(errno.ENODEV,

2975

"{} not a character device"

2264

2976

.format(os.devnull))

2265

2977

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

2266

2978

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

2270

2982

2271

2983

2272

2984

def main():

2273

2985

2274

2986

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

2275

2987

# Parsing of options, both command line and config file

2276

2988

2277

2989

parser = argparse.ArgumentParser()

2278

2990

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

2279

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

2991

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

2280

2992

help="show version number and exit")

2281

2993

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

2282

2994

help="Bind to interface IF")

2318

3030

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

2319

3031

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

2320

3032

default=None)

2321

3033

2322

3034

options = parser.parse_args()

2323

2324

if options.check:

2325

import doctest

2326

fail_count, test_count = doctest.testmod()

2327

sys.exit(os.EX_OK if fail_count == 0 else 1)

2328

3035

2329

3036

# Default values for config file for server-global settings

2330

server_defaults = { "interface": "",

2331

"address": "",

2332

"port": "",

2333

"debug": "False",

2334

"priority":

2335

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",

2336

"servicename": "Mandos",

2337

"use_dbus": "True",

2338

"use_ipv6": "True",

2339

"debuglevel": "",

2340

"restore": "True",

2341

"socket": "",

2342

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

2343

"foreground": "False",

2344

"zeroconf": "True",

2345

}

2346

3037

if gnutls.has_rawpk:

3038

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

3039

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

3040

else:

3041

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

3042

":+SIGN-DSA-SHA256")

3043

server_defaults = {"interface": "",

3044

"address": "",

3045

"port": "",

3046

"debug": "False",

3047

"priority": priority,

3048

"servicename": "Mandos",

3049

"use_dbus": "True",

3050

"use_ipv6": "True",

3051

"debuglevel": "",

3052

"restore": "True",

3053

"socket": "",

3054

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

3055

"foreground": "False",

3056

"zeroconf": "True",

3057

}

3058

del priority

3059

2347

3060

# Parse config file for server-global settings

2348

server_config = configparser.SafeConfigParser(server_defaults)

3061

server_config = configparser.ConfigParser(server_defaults)

2349

3062

del server_defaults

2350

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

2351

"mandos.conf"))

2352

# Convert the SafeConfigParser object to a dict

3063

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

3064

# Convert the ConfigParser object to a dict

2353

3065

server_settings = server_config.defaults()

2354

3066

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

2355

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

3067

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

3068

"foreground", "zeroconf"):

2356

3069

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

2357

3070

option)

2358

3071

if server_settings["port"]:

2368

3081

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

2369

3082

["socket"])

2370

3083

del server_config

2371

3084

2372

3085

# Override the settings from the config file with command line

2373

3086

# options, if set.

2374

3087

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

2375

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

2376

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

2377

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

3088

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

3089

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

3090

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

2378

3091

value = getattr(options, option)

2379

3092

if value is not None:

2380

3093

server_settings[option] = value

2392

3105

if server_settings["debug"]:

2393

3106

server_settings["foreground"] = True

2394

3107

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

2395

3108

2396

3109

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

2397

2398

if (not server_settings["zeroconf"] and

2399

not (server_settings["port"]

2400

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

2401

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

2402

" Zeroconf")

2403

3110

3111

if (not server_settings["zeroconf"]

3112

and not (server_settings["port"]

3113

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

3114

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

3115

2404

3116

# For convenience

2405

3117

debug = server_settings["debug"]

2406

3118

debuglevel = server_settings["debuglevel"]

2410

3122

stored_state_file)

2411

3123

foreground = server_settings["foreground"]

2412

3124

zeroconf = server_settings["zeroconf"]

2413

3125

2414

3126

if debug:

2415

3127

initlogger(debug, logging.DEBUG)

2416

3128

else:

2419

3131

else:

2420

3132

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

2421

3133

initlogger(debug, level)

2422

3134

2423

3135

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

2424

syslogger.setFormatter(logging.Formatter

2425

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

2426

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

2427

.format(server_settings

2428

["servicename"])))

2429

3136

syslogger.setFormatter(

3137

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

3138

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

3139

server_settings["servicename"])))

3140

2430

3141

# Parse config file with clients

2431

client_config = configparser.SafeConfigParser(Client

2432

.client_defaults)

3142

client_config = configparser.ConfigParser(Client.client_defaults)

2433

3143

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

2434

3144

"clients.conf"))

2435

3145

2436

3146

global mandos_dbus_service

2437

3147

mandos_dbus_service = None

2438

3148

2439

3149

socketfd = None

2440

3150

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

2441

3151

socketfd = server_settings["socket"]

2442

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

2443

server_settings["port"]),

2444

ClientHandler,

2445

interface=(server_settings["interface"]

2446

or None),

2447

use_ipv6=use_ipv6,

2448

gnutls_priority=

2449

server_settings["priority"],

2450

use_dbus=use_dbus,

2451

socketfd=socketfd)

3152

tcp_server = MandosServer(

3153

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

3154

ClientHandler,

3155

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

3156

use_ipv6=use_ipv6,

3157

gnutls_priority=server_settings["priority"],

3158

use_dbus=use_dbus,

3159

socketfd=socketfd)

2452

3160

if not foreground:

2453

3161

pidfilename = "/run/mandos.pid"

2454

3162

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

2455

3163

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

2456

3164

pidfile = None

2457

3165

try:

2458

pidfile = open(pidfilename, "w")

3166

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

2459

3167

except IOError as e:

2460

3168

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

2461

3169

exc_info=e)

2462

2463

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

3170

3171

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

3172

("mandos", "mandos"),

3173

("nobody", "nogroup")):

2464

3174

try:

2465

3175

uid = pwd.getpwnam(name).pw_uid

2466

gid = pwd.getpwnam(name).pw_gid

3176

gid = pwd.getpwnam(group).pw_gid

2467

3177

break

2468

3178

except KeyError:

2469

3179

continue

2473

3183

try:

2474

3184

os.setgid(gid)

2475

3185

os.setuid(uid)

3186

if debug:

3187

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

3188

gid))

2476

3189

except OSError as error:

3190

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

3191

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

2477

3192

if error.errno != errno.EPERM:

2478

3193

raise

2479

3194

2480

3195

if debug:

2481

3196

# Enable all possible GnuTLS debugging

2482

3197

2483

3198

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

2484

3199

# - GnuTLS manual

2485

gnutls.library.functions.gnutls_global_set_log_level(11)

2486

2487

@gnutls.library.types.gnutls_log_func

3200

gnutls.global_set_log_level(11)

3201

3202

@gnutls.log_func

2488

3203

def debug_gnutls(level, string):

2489

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

2490

2491

(gnutls.library.functions

2492

.gnutls_global_set_log_function(debug_gnutls))

2493

3204

logger.debug("GnuTLS: %s",

3205

string[:-1].decode("utf-8",

3206

errors="replace"))

3207

3208

gnutls.global_set_log_function(debug_gnutls)

3209

2494

3210

# Redirect stdin so all checkers get /dev/null

2495

3211

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

2496

3212

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

2497

3213

if null > 2:

2498

3214

os.close(null)

2499

3215

2500

3216

# Need to fork before connecting to D-Bus

2501

3217

if not foreground:

2502

3218

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

2503

3219

daemon()

2504

2505

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

2506

# need to inform gobject that threads will be used.

2507

gobject.threads_init()

2508

3220

3221

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

3222

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

3223

# need to inform GLib that threads will be used.

3224

GLib.threads_init()

3225

2509

3226

global main_loop

2510

3227

# From the Avahi example code

2511

3228

DBusGMainLoop(set_as_default=True)

2512

main_loop = gobject.MainLoop()

3229

main_loop = GLib.MainLoop()

2513

3230

bus = dbus.SystemBus()

2514

3231

# End of Avahi example code

2515

3232

if use_dbus:

2516

3233

try:

2517

3234

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

2518

bus, do_not_queue=True)

2519

old_bus_name = (dbus.service.BusName

2520

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

2521

do_not_queue=True))

2522

except dbus.exceptions.NameExistsException as e:

3235

bus,

3236

do_not_queue=True)

3237

old_bus_name = dbus.service.BusName(

3238

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

3239

do_not_queue=True)

3240

except dbus.exceptions.DBusException as e:

2523

3241

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

2524

3242

use_dbus = False

2525

3243

server_settings["use_dbus"] = False

2526

3244

tcp_server.use_dbus = False

2527

3245

if zeroconf:

2528

3246

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2529

service = AvahiServiceToSyslog(name =

2530

server_settings["servicename"],

2531

servicetype = "_mandos._tcp",

2532

protocol = protocol, bus = bus)

3247

service = AvahiServiceToSyslog(

3248

name=server_settings["servicename"],

3249

servicetype="_mandos._tcp",

3250

protocol=protocol,

3251

bus=bus)

2533

3252

if server_settings["interface"]:

2534

service.interface = (if_nametoindex

2535

(server_settings["interface"]

2536

.encode("utf-8")))

2537

3253

service.interface = if_nametoindex(

3254

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

3255

2538

3256

global multiprocessing_manager

2539

3257

multiprocessing_manager = multiprocessing.Manager()

2540

3258

2541

3259

client_class = Client

2542

3260

if use_dbus:

2543

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

2544

3261

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

3262

2545

3263

client_settings = Client.config_parser(client_config)

2546

3264

old_client_settings = {}

2547

3265

clients_data = {}

2548

3266

2549

3267

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

2550

3268

global wnull

2551

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

3269

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

2552

3270

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

2553

3271

# mode

2554

3272

if debug or not foreground:

2555

3273

wnull.close()

2556

3274

2557

3275

# Get client data and settings from last running state.

2558

3276

if server_settings["restore"]:

2559

3277

try:

2560

3278

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

2561

clients_data, old_client_settings = (pickle.load

2562

(stored_state))

3279

if sys.version_info.major == 2:

3280

clients_data, old_client_settings = pickle.load(

3281

stored_state)

3282

else:

3283

bytes_clients_data, bytes_old_client_settings = (

3284

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

3285

# Fix bytes to strings

3286

# clients_data

3287

# .keys()

3288

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

3289

if isinstance(key, bytes)

3290

else key): value

3291

for key, value in

3292

bytes_clients_data.items()}

3293

del bytes_clients_data

3294

for key in clients_data:

3295

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

3296

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

3297

for k, v in

3298

clients_data[key].items()}

3299

clients_data[key] = value

3300

# .client_structure

3301

value["client_structure"] = [

3302

(s.decode("utf-8")

3303

if isinstance(s, bytes)

3304

else s) for s in

3305

value["client_structure"]]

3306

# .name, .host, and .checker_command

3307

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

3308

if isinstance(value[k], bytes):

3309

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

3310

if "key_id" not in value:

3311

value["key_id"] = ""

3312

elif "fingerprint" not in value:

3313

value["fingerprint"] = ""

3314

# old_client_settings

3315

# .keys()

3316

old_client_settings = {

3317

(key.decode("utf-8")

3318

if isinstance(key, bytes)

3319

else key): value

3320

for key, value in

3321

bytes_old_client_settings.items()}

3322

del bytes_old_client_settings

3323

# .host and .checker_command

3324

for value in old_client_settings.values():

3325

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

3326

if isinstance(value[attribute], bytes):

3327

value[attribute] = (value[attribute]

3328

.decode("utf-8"))

2563

3329

os.remove(stored_state_path)

2564

3330

except IOError as e:

2565

3331

if e.errno == errno.ENOENT:

2566

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

2567

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

3332

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

3333

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

2568

3334

else:

2569

3335

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

2570

3336

exc_info=e)

2571

3337

raise

2572

3338

except EOFError as e:

2573

3339

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

2574

"EOFError:", exc_info=e)

2575

3340

"EOFError:",

3341

exc_info=e)

3342

2576

3343

with PGPEngine() as pgp:

2577

3344

for client_name, client in clients_data.items():

2578

3345

# Skip removed clients

2579

3346

if client_name not in client_settings:

2580

3347

continue

2581

3348

2582

3349

# Decide which value to use after restoring saved state.

2583

3350

# We have three different values: Old config file,

2584

3351

# new config file, and saved state.

2589

3356

# For each value in new config, check if it

2590

3357

# differs from the old config value (Except for

2591

3358

# the "secret" attribute)

2592

if (name != "secret" and

2593

value != old_client_settings[client_name]

2594

[name]):

3359

if (name != "secret"

3360

and (value !=

3361

old_client_settings[client_name][name])):

2595

3362

client[name] = value

2596

3363

except KeyError:

2597

3364

pass

2598

3365

2599

3366

# Clients who has passed its expire date can still be

2600

# enabled if its last checker was successful. Clients

3367

# enabled if its last checker was successful. A Client

2601

3368

# whose checker succeeded before we stored its state is

2602

3369

# assumed to have successfully run all checkers during

2603

3370

# downtime.

2606

3373

if not client["last_checked_ok"]:

2607

3374

logger.warning(

2608

3375

"disabling client {} - Client never "

2609

"performed a successful checker"

2610

.format(client_name))

3376

"performed a successful checker".format(

3377

client_name))

2611

3378

client["enabled"] = False

2612

3379

elif client["last_checker_status"] != 0:

2613

3380

logger.warning(

2614

3381

"disabling client {} - Client last"

2615

" checker failed with error code {}"

2616

.format(client_name,

2617

client["last_checker_status"]))

3382

" checker failed with error code"

3383

" {}".format(

3384

client_name,

3385

client["last_checker_status"]))

2618

3386

client["enabled"] = False

2619

3387

else:

2620

client["expires"] = (datetime.datetime

2621

.utcnow()

2622

+ client["timeout"])

3388

client["expires"] = (

3389

datetime.datetime.utcnow()

3390

+ client["timeout"])

2623

3391

logger.debug("Last checker succeeded,"

2624

" keeping {} enabled"

2625

.format(client_name))

3392

" keeping {} enabled".format(

3393

client_name))

2626

3394

try:

2627

client["secret"] = (

2628

pgp.decrypt(client["encrypted_secret"],

2629

client_settings[client_name]

2630

["secret"]))

3395

client["secret"] = pgp.decrypt(

3396

client["encrypted_secret"],

3397

client_settings[client_name]["secret"])

2631

3398

except PGPError:

2632

3399

# If decryption fails, we use secret from new settings

2633

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

2634

.format(client_name))

2635

client["secret"] = (

2636

client_settings[client_name]["secret"])

2637

3400

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

3401

client_name))

3402

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

3403

["secret"])

3404

2638

3405

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

2639

3406

for client_name in (set(old_client_settings)

2640

3407

- set(client_settings)):

2642

3409

for client_name in (set(client_settings)

2643

3410

- set(old_client_settings)):

2644

3411

clients_data[client_name] = client_settings[client_name]

2645

3412

2646

3413

# Create all client objects

2647

3414

for client_name, client in clients_data.items():

2648

3415

tcp_server.clients[client_name] = client_class(

2649

name = client_name, settings = client,

2650

server_settings = server_settings)

2651

3416

name=client_name,

3417

settings=client,

3418

server_settings=server_settings)

3419

2652

3420

if not tcp_server.clients:

2653

3421

logger.warning("No clients defined")

2654

3422

2655

3423

if not foreground:

2656

3424

if pidfile is not None:

3425

pid = os.getpid()

2657

3426

try:

2658

3427

with pidfile:

2659

pid = os.getpid()

2660

pidfile.write("{}\n".format(pid).encode("utf-8"))

3428

print(pid, file=pidfile)

2661

3429

except IOError:

2662

3430

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

2663

3431

pidfilename, pid)

2664

3432

del pidfile

2665

3433

del pidfilename

2666

2667

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

2668

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

2669

3434

3435

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

3436

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3437

lambda: main_loop.quit() and False)

3438

2670

3439

if use_dbus:

2671

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

2672

"se.bsnet.fukt.Mandos"})

2673

class MandosDBusService(DBusObjectWithProperties):

3440

3441

@alternate_dbus_interfaces(

3442

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

3443

class MandosDBusService(DBusObjectWithObjectManager):

2674

3444

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

3445

2675

3446

def __init__(self):

2676

3447

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

3448

2677

3449

_interface = "se.recompile.Mandos"

2678

2679

@dbus_interface_annotations(_interface)

2680

def _foo(self):

2681

return { "org.freedesktop.DBus.Property"

2682

".EmitsChangedSignal":

2683

"false"}

2684

3450

2685

3451

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

2686

3452

def ClientAdded(self, objpath):

2687

3453

"D-Bus signal"

2688

3454

pass

2689

3455

2690

3456

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

2691

def ClientNotFound(self, fingerprint, address):

3457

def ClientNotFound(self, key_id, address):

2692

3458

"D-Bus signal"

2693

3459

pass

2694

3460

3461

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

3462

"true"})

2695

3463

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

2696

3464

def ClientRemoved(self, objpath, name):

2697

3465

"D-Bus signal"

2698

3466

pass

2699

3467

3468

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

3469

"true"})

2700

3470

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

2701

3471

def GetAllClients(self):

2702

3472

"D-Bus method"

2703

return dbus.Array(c.dbus_object_path

2704

for c in

2705

tcp_server.clients.itervalues())

2706

3473

return dbus.Array(c.dbus_object_path for c in

3474

tcp_server.clients.values())

3475

3476

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

3477

"true"})

2707

3478

@dbus.service.method(_interface,

2708

3479

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

2709

3480

def GetAllClientsWithProperties(self):

2710

3481

"D-Bus method"

2711

3482

return dbus.Dictionary(

2712

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

2713

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

3483

{c.dbus_object_path: c.GetAll(

3484

"se.recompile.Mandos.Client")

3485

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

2714

3486

signature="oa{sv}")

2715

3487

2716

3488

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

2717

3489

def RemoveClient(self, object_path):

2718

3490

"D-Bus method"

2719

for c in tcp_server.clients.itervalues():

3491

for c in tcp_server.clients.values():

2720

3492

if c.dbus_object_path == object_path:

2721

3493

del tcp_server.clients[c.name]

2722

3494

c.remove_from_connection()

2723

# Don't signal anything except ClientRemoved

3495

# Don't signal the disabling

2724

3496

c.disable(quiet=True)

2725

# Emit D-Bus signal

2726

self.ClientRemoved(object_path, c.name)

3497

# Emit D-Bus signal for removal

3498

self.client_removed_signal(c)

2727

3499

return

2728

3500

raise KeyError(object_path)

2729

3501

2730

3502

del _interface

2731

3503

3504

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3505

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

3506

def GetManagedObjects(self):

3507

"""D-Bus method"""

3508

return dbus.Dictionary(

3509

{client.dbus_object_path:

3510

dbus.Dictionary(

3511

{interface: client.GetAll(interface)

3512

for interface in

3513

client._get_all_interface_names()})

3514

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

3515

3516

def client_added_signal(self, client):

3517

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

3518

if use_dbus:

3519

# New standard signal

3520

self.InterfacesAdded(

3521

client.dbus_object_path,

3522

dbus.Dictionary(

3523

{interface: client.GetAll(interface)

3524

for interface in

3525

client._get_all_interface_names()}))

3526

# Old signal

3527

self.ClientAdded(client.dbus_object_path)

3528

3529

def client_removed_signal(self, client):

3530

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

3531

if use_dbus:

3532

# New standard signal

3533

self.InterfacesRemoved(

3534

client.dbus_object_path,

3535

client._get_all_interface_names())

3536

# Old signal

3537

self.ClientRemoved(client.dbus_object_path,

3538

client.name)

3539

2732

3540

mandos_dbus_service = MandosDBusService()

2733

3541

3542

# Save modules to variables to exempt the modules from being

3543

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

3544

mp = multiprocessing

3545

wn = wnull

3546

2734

3547

def cleanup():

2735

3548

"Cleanup function; run on exit"

2736

3549

if zeroconf:

2737

3550

service.cleanup()

2738

2739

multiprocessing.active_children()

2740

wnull.close()

3551

3552

mp.active_children()

3553

wn.close()

2741

3554

if not (tcp_server.clients or client_settings):

2742

3555

return

2743

3556

2744

3557

# Store client before exiting. Secrets are encrypted with key

2745

3558

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

2746

3559

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

2747

3560

clients = {}

2748

3561

with PGPEngine() as pgp:

2749

for client in tcp_server.clients.itervalues():

3562

for client in tcp_server.clients.values():

2750

3563

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

2751

3564

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

2752

3565

key)

2753

3566

client_dict = {}

2754

3567

2755

3568

# A list of attributes that can not be pickled

2756

3569

# + secret.

2757

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

2758

"checker", "server_settings" }

2759

for name, typ in (inspect.getmembers

2760

(dbus.service.Object)):

3570

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

3571

"checker", "server_settings"}

3572

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

3573

.Object):

2761

3574

exclude.add(name)

2762

3575

2763

3576

client_dict["encrypted_secret"] = (client

2764

3577

.encrypted_secret)

2765

3578

for attr in client.client_structure:

2766

3579

if attr not in exclude:

2767

3580

client_dict[attr] = getattr(client, attr)

2768

3581

2769

3582

clients[client.name] = client_dict

2770

3583

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

2771

3584

2772

3585

try:

2773

with (tempfile.NamedTemporaryFile

2774

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

2775

dir=os.path.dirname(stored_state_path),

2776

delete=False)) as stored_state:

2777

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

2778

tempname=stored_state.name

3586

with tempfile.NamedTemporaryFile(

3587

mode="wb",

3588

suffix=".pickle",

3589

prefix="clients-",

3590

dir=os.path.dirname(stored_state_path),

3591

delete=False) as stored_state:

3592

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

3593

protocol=2)

3594

tempname = stored_state.name

2779

3595

os.rename(tempname, stored_state_path)

2780

3596

except (IOError, OSError) as e:

2781

3597

if not debug:

2790

3606

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

2791

3607

exc_info=e)

2792

3608

raise

2793

3609

2794

3610

# Delete all clients, and settings from config

2795

3611

while tcp_server.clients:

2796

3612

name, client = tcp_server.clients.popitem()

2797

3613

if use_dbus:

2798

3614

client.remove_from_connection()

2799

# Don't signal anything except ClientRemoved

3615

# Don't signal the disabling

2800

3616

client.disable(quiet=True)

3617

# Emit D-Bus signal for removal

2801

3618

if use_dbus:

2802

# Emit D-Bus signal

2803

mandos_dbus_service.ClientRemoved(client

2804

.dbus_object_path,

2805

client.name)

3619

mandos_dbus_service.client_removed_signal(client)

2806

3620

client_settings.clear()

2807

3621

2808

3622

atexit.register(cleanup)

2809

2810

for client in tcp_server.clients.itervalues():

3623

3624

for client in tcp_server.clients.values():

2811

3625

if use_dbus:

2812

# Emit D-Bus signal

2813

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3626

# Emit D-Bus signal for adding

3627

mandos_dbus_service.client_added_signal(client)

2814

3628

# Need to initiate checking of clients

2815

3629

if client.enabled:

2816

3630

client.init_checker()

2817

3631

2818

3632

tcp_server.enable()

2819

3633

tcp_server.server_activate()

2820

3634

2821

3635

# Find out what port we got

2822

3636

if zeroconf:

2823

3637

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

2828

3642

else: # IPv4

2829

3643

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

2830

3644

*tcp_server.socket.getsockname())

2831

2832

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

2833

3645

3646

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

3647

2834

3648

try:

2835

3649

if zeroconf:

2836

3650

# From the Avahi example code

2841

3655

cleanup()

2842

3656

sys.exit(1)

2843

3657

# End of Avahi example code

2844

2845

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

2846

lambda *args, **kwargs:

2847

(tcp_server.handle_request

2848

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

2849

3658

3659

GLib.io_add_watch(

3660

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

3661

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

3662

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

3663

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

3664

2850

3665

logger.debug("Starting main loop")

2851

3666

main_loop.run()

2852

3667

except AvahiError as error:

2861

3676

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

2862

3677

cleanup()

2863

3678

2864

if __name__ == '__main__':

2865

main()

3679

3680

def should_only_run_tests():

3681

parser = argparse.ArgumentParser(add_help=False)

3682

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

3683

args, unknown_args = parser.parse_known_args()

3684

run_tests = args.check

3685

if run_tests:

3686

# Remove --check argument from sys.argv

3687

sys.argv[1:] = unknown_args

3688

return run_tests

3689

3690

# Add all tests from doctest strings

3691

def load_tests(loader, tests, none):

3692

import doctest

3693

tests.addTests(doctest.DocTestSuite())

3694

return tests

3695

3696

if __name__ == "__main__":

3697

try:

3698

if should_only_run_tests():

3699

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

3700

unittest.main()

3701

else:

3702

main()

3703

finally:

3704

logging.shutdown()