/mandos/trunk : revision 821

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

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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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from future_builtins import *

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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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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 dbus

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import dbus.service

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import gobject

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try:

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from gi.repository import GObject

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except ImportError:

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import gobject as GObject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.6.5"

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if sys.version_info.major == 2:

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str = unicode

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version = "1.7.3"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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

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

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return interface_index

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"""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 = str("/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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class PGPEngine(object):

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

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def __init__(self):

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

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == "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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'--home', self.tempdir,

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir=self.tempdir

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) as passfile:

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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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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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir = self.tempdir

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) as passfile:

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with tempfile.NamedTemporaryFile(

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dir = self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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decrypted_plaintext, err = proc.communicate(input

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= data)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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class AvahiError(Exception):

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

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self.value = value

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

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def __unicode__(self):

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return unicode(repr(self.value))

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

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**kwargs)

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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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pass

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bus: dbus.SystemBus()

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"""

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

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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def __init__(self,

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interface = avahi.IF_UNSPEC,

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name = None,

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servicetype = None,

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port = None,

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TXT = None,

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domain = "",

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host = "",

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max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

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self.interface = interface

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self.name = name

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self.type = servicetype

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self):

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def rename(self, remove=True):

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

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if self.rename_count >= self.max_renames:

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

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

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self.name = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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

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self.name)

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self.remove()

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if remove:

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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if (error.get_dbus_name()

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

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

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return self.rename(remove=False)

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else:

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

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self.cleanup()

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os._exit(1)

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def remove(self):

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

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self.rename()

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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unicode(error))

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

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.format(error))

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str(error))

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

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def cleanup(self):

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

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

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

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

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bad_states = { avahi.SERVER_INVALID:

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"Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION:

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"Zeroconf server name collision",

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avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

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bad_states = {

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avahi.SERVER_INVALID: "Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION: "Zeroconf server name collision",

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avahi.SERVER_FAILURE: "Zeroconf server failure",

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}

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if state in bad_states:

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if bad_states[state] is not None:

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if error is None:

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

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self.cleanup()

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elif state == avahi.SERVER_RUNNING:

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self.add()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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if (error.get_dbus_name()

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

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logger.info("Local Zeroconf service name"

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" collision.")

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return self.rename(remove=False)

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else:

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

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self.cleanup()

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os._exit(1)

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else:

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if error is None:

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

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follow_name_owner_changes=True),

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avahi.DBUS_INTERFACE_SERVER)

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self.server.connect_to_signal("StateChanged",

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self.server_state_changed)

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self.server_state_changed)

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

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class AvahiServiceToSyslog(AvahiService):

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def rename(self):

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

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

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ret = AvahiService.rename(self)

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syslogger.setFormatter(logging.Formatter

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

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

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.format(self.name)))

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ret = AvahiService.rename(self, *args, **kwargs)

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syslogger.setFormatter(logging.Formatter(

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

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.format(self.name)))

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return ret

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def timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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# Pretend that we have a GnuTLS module

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class GnuTLS(object):

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

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It is instantiated once, and simulates having a GnuTLS module."""

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_library = ctypes.cdll.LoadLibrary(

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ctypes.util.find_library("gnutls"))

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_need_version = "3.3.0"

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def __init__(self):

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# Need to use class name "GnuTLS" here, since this method is

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# called before the assignment to the "gnutls" global variable

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# happens.

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if GnuTLS.check_version(self._need_version) is None:

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

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.format(self._need_version))

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# Unless otherwise indicated, the constants and types below are

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

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# Constants

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E_SUCCESS = 0

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E_INTERRUPTED = -52

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E_AGAIN = -28

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CRT_OPENPGP = 2

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CLIENT = 2

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SHUT_RDWR = 0

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CRD_CERTIFICATE = 1

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E_NO_CERTIFICATE_FOUND = -49

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OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

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# Types

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class session_int(ctypes.Structure):

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_fields_ = []

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session_t = ctypes.POINTER(session_int)

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class certificate_credentials_st(ctypes.Structure):

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_fields_ = []

479

certificate_credentials_t = ctypes.POINTER(

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certificate_credentials_st)

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certificate_type_t = ctypes.c_int

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class datum_t(ctypes.Structure):

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

484

('size', ctypes.c_uint)]

485

class openpgp_crt_int(ctypes.Structure):

486

_fields_ = []

487

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

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openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

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

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credentials_type_t = ctypes.c_int #

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transport_ptr_t = ctypes.c_void_p

492

close_request_t = ctypes.c_int

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494

# Exceptions

495

class Error(Exception):

496

# We need to use the class name "GnuTLS" here, since this

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# exception might be raised from within GnuTLS.__init__,

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# which is called before the assignment to the "gnutls"

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# global variable has happened.

500

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

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

502

# code is passed, convert it to a string with

503

# gnutls.strerror()

504

self.code = code

505

if message is None and code is not None:

506

message = GnuTLS.strerror(code)

507

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

508

message, *args)

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510

class CertificateSecurityError(Error):

511

pass

512

513

# Classes

514

class Credentials(object):

515

def __init__(self):

516

self._c_object = gnutls.certificate_credentials_t()

517

gnutls.certificate_allocate_credentials(

518

ctypes.byref(self._c_object))

519

self.type = gnutls.CRD_CERTIFICATE

520

521

def __del__(self):

522

gnutls.certificate_free_credentials(self._c_object)

523

524

class ClientSession(object):

525

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

526

self._c_object = gnutls.session_t()

527

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

528

gnutls.set_default_priority(self._c_object)

529

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

530

gnutls.handshake_set_private_extensions(self._c_object,

531

True)

532

self.socket = socket

533

if credentials is None:

534

credentials = gnutls.Credentials()

535

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

536

ctypes.cast(credentials._c_object,

537

ctypes.c_void_p))

538

self.credentials = credentials

539

540

def __del__(self):

541

gnutls.deinit(self._c_object)

542

543

def handshake(self):

544

return gnutls.handshake(self._c_object)

545

546

def send(self, data):

547

data = bytes(data)

548

data_len = len(data)

549

while data_len > 0:

550

data_len -= gnutls.record_send(self._c_object,

551

data[-data_len:],

552

data_len)

553

554

def bye(self):

555

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

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557

# Error handling functions

558

def _error_code(result):

559

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

560

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

561

if result >= 0:

562

return result

563

if result == gnutls.E_NO_CERTIFICATE_FOUND:

564

raise gnutls.CertificateSecurityError(code = result)

565

raise gnutls.Error(code = result)

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567

def _retry_on_error(result, func, arguments):

568

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

569

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

570

while result < 0:

571

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

572

return _error_code(result)

573

result = func(*arguments)

574

return result

575

576

# Unless otherwise indicated, the function declarations below are

577

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

578

579

# Functions

580

priority_set_direct = _library.gnutls_priority_set_direct

581

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

582

ctypes.POINTER(ctypes.c_char_p)]

583

priority_set_direct.restype = _error_code

584

585

init = _library.gnutls_init

586

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

587

init.restype = _error_code

588

589

set_default_priority = _library.gnutls_set_default_priority

590

set_default_priority.argtypes = [session_t]

591

set_default_priority.restype = _error_code

592

593

record_send = _library.gnutls_record_send

594

record_send.argtypes = [session_t, ctypes.c_void_p,

595

ctypes.c_size_t]

596

record_send.restype = ctypes.c_ssize_t

597

record_send.errcheck = _retry_on_error

598

599

certificate_allocate_credentials = (

600

_library.gnutls_certificate_allocate_credentials)

601

certificate_allocate_credentials.argtypes = [

602

ctypes.POINTER(certificate_credentials_t)]

603

certificate_allocate_credentials.restype = _error_code

604

605

certificate_free_credentials = (

606

_library.gnutls_certificate_free_credentials)

607

certificate_free_credentials.argtypes = [certificate_credentials_t]

608

certificate_free_credentials.restype = None

609

610

handshake_set_private_extensions = (

611

_library.gnutls_handshake_set_private_extensions)

612

handshake_set_private_extensions.argtypes = [session_t,

613

ctypes.c_int]

614

handshake_set_private_extensions.restype = None

615

616

credentials_set = _library.gnutls_credentials_set

617

credentials_set.argtypes = [session_t, credentials_type_t,

618

ctypes.c_void_p]

619

credentials_set.restype = _error_code

620

621

strerror = _library.gnutls_strerror

622

strerror.argtypes = [ctypes.c_int]

623

strerror.restype = ctypes.c_char_p

624

625

certificate_type_get = _library.gnutls_certificate_type_get

626

certificate_type_get.argtypes = [session_t]

627

certificate_type_get.restype = _error_code

628

629

certificate_get_peers = _library.gnutls_certificate_get_peers

630

certificate_get_peers.argtypes = [session_t,

631

ctypes.POINTER(ctypes.c_uint)]

632

certificate_get_peers.restype = ctypes.POINTER(datum_t)

633

634

global_set_log_level = _library.gnutls_global_set_log_level

635

global_set_log_level.argtypes = [ctypes.c_int]

636

global_set_log_level.restype = None

637

638

global_set_log_function = _library.gnutls_global_set_log_function

639

global_set_log_function.argtypes = [log_func]

640

global_set_log_function.restype = None

641

642

deinit = _library.gnutls_deinit

643

deinit.argtypes = [session_t]

644

deinit.restype = None

645

646

handshake = _library.gnutls_handshake

647

handshake.argtypes = [session_t]

648

handshake.restype = _error_code

649

handshake.errcheck = _retry_on_error

650

651

transport_set_ptr = _library.gnutls_transport_set_ptr

652

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

653

transport_set_ptr.restype = None

654

655

bye = _library.gnutls_bye

656

bye.argtypes = [session_t, close_request_t]

657

bye.restype = _error_code

658

bye.errcheck = _retry_on_error

659

660

check_version = _library.gnutls_check_version

661

check_version.argtypes = [ctypes.c_char_p]

662

check_version.restype = ctypes.c_char_p

663

664

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

665

666

openpgp_crt_init = _library.gnutls_openpgp_crt_init

667

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

668

openpgp_crt_init.restype = _error_code

669

670

openpgp_crt_import = _library.gnutls_openpgp_crt_import

671

openpgp_crt_import.argtypes = [openpgp_crt_t,

672

ctypes.POINTER(datum_t),

673

openpgp_crt_fmt_t]

674

openpgp_crt_import.restype = _error_code

675

676

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

677

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

678

ctypes.POINTER(ctypes.c_uint)]

679

openpgp_crt_verify_self.restype = _error_code

680

681

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

682

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

683

openpgp_crt_deinit.restype = None

684

685

openpgp_crt_get_fingerprint = (

686

_library.gnutls_openpgp_crt_get_fingerprint)

687

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

688

ctypes.c_void_p,

689

ctypes.POINTER(

690

ctypes.c_size_t)]

691

openpgp_crt_get_fingerprint.restype = _error_code

692

693

# Remove non-public functions

694

del _error_code, _retry_on_error

695

# Create the global "gnutls" object, simulating a module

696

gnutls = GnuTLS()

697

698

def call_pipe(connection, # : multiprocessing.Connection

699

func, *args, **kwargs):

700

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

701

702

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

703

return value on the provided multiprocessing.Connection.

704

"""

705

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

706

connection.close()

410

707

411

708

class Client(object):

412

709

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

418

715

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

419

716

to see if the client lives.

420

717

'None' if no process is running.

421

checker_callback_tag: a gobject event source tag, or None

718

checker_callback_tag: a GObject event source tag, or None

422

719

checker_command: string; External command which is run to check

423

720

if client lives. %() expansions are done at

424

721

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

425

722

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

426

checker_initiator_tag: a gobject event source tag, or None

723

checker_initiator_tag: a GObject event source tag, or None

427

724

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

428

725

client_structure: Object describing what attributes a client has

429

726

and is used for storing the client at exit

430

727

current_checker_command: string; current running checker_command

431

disable_initiator_tag: a gobject event source tag, or None

728

disable_initiator_tag: a GObject event source tag, or None

432

729

enabled: bool()

433

730

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

434

731

uniquely identify the client

439

736

last_checker_status: integer between 0 and 255 reflecting exit

440

737

status of last checker. -1 reflects crashed

441

738

checker, -2 means no checker completed yet.

739

last_checker_signal: The signal which killed the last checker, if

740

last_checker_status is -1

442

741

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

443

742

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

444

743

D-Bus identifiers

457

756

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

458

757

"last_approval_request", "last_checked_ok",

459

758

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

460

client_defaults = { "timeout": "PT5M",

461

"extended_timeout": "PT15M",

462

"interval": "PT2M",

463

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

464

"host": "",

465

"approval_delay": "PT0S",

466

"approval_duration": "PT1S",

467

"approved_by_default": "True",

468

"enabled": "True",

469

}

470

471

def timeout_milliseconds(self):

472

"Return the 'timeout' attribute in milliseconds"

473

return timedelta_to_milliseconds(self.timeout)

474

475

def extended_timeout_milliseconds(self):

476

"Return the 'extended_timeout' attribute in milliseconds"

477

return timedelta_to_milliseconds(self.extended_timeout)

478

479

def interval_milliseconds(self):

480

"Return the 'interval' attribute in milliseconds"

481

return timedelta_to_milliseconds(self.interval)

482

483

def approval_delay_milliseconds(self):

484

return timedelta_to_milliseconds(self.approval_delay)

759

client_defaults = {

760

"timeout": "PT5M",

761

"extended_timeout": "PT15M",

762

"interval": "PT2M",

763

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

764

"host": "",

765

"approval_delay": "PT0S",

766

"approval_duration": "PT1S",

767

"approved_by_default": "True",

768

"enabled": "True",

769

}

485

770

486

771

@staticmethod

487

772

def config_parser(config):

503

788

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

504

789

"enabled")

505

790

791

# Uppercase and remove spaces from fingerprint for later

792

# comparison purposes with return value from the

793

# fingerprint() function

506

794

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

507

795

.replace(" ", ""))

508

796

if "secret" in section:

513

801

"rb") as secfile:

514

802

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

515

803

else:

516

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

804

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

517

805

.format(section))

518

806

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

519

807

client["extended_timeout"] = string_to_delta(

536

824

server_settings = {}

537

825

self.server_settings = server_settings

538

826

# adding all client settings

539

for setting, value in settings.iteritems():

827

for setting, value in settings.items():

540

828

setattr(self, setting, value)

541

829

542

830

if self.enabled:

550

838

self.expires = None

551

839

552

840

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

553

# Uppercase and remove spaces from fingerprint for later

554

# comparison purposes with return value from the fingerprint()

555

# function

556

841

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

557

842

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

558

843

datetime.datetime.utcnow())

565

850

self.current_checker_command = None

566

851

self.approved = None

567

852

self.approvals_pending = 0

568

self.changedstate = (multiprocessing_manager

569

.Condition(multiprocessing_manager

570

.Lock()))

571

self.client_structure = [attr for attr in

572

self.__dict__.iterkeys()

853

self.changedstate = multiprocessing_manager.Condition(

854

multiprocessing_manager.Lock())

855

self.client_structure = [attr

856

for attr in self.__dict__.iterkeys()

573

857

if not attr.startswith("_")]

574

858

self.client_structure.append("client_structure")

575

859

576

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

577

lambda obj:

578

isinstance(obj,

579

property)):

860

for name, t in inspect.getmembers(

861

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

580

862

if not name.startswith("_"):

581

863

self.client_structure.append(name)

582

864

603

885

if not quiet:

604

886

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

605

887

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

606

gobject.source_remove(self.disable_initiator_tag)

888

GObject.source_remove(self.disable_initiator_tag)

607

889

self.disable_initiator_tag = None

608

890

self.expires = None

609

891

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

610

gobject.source_remove(self.checker_initiator_tag)

892

GObject.source_remove(self.checker_initiator_tag)

611

893

self.checker_initiator_tag = None

612

894

self.stop_checker()

613

895

self.enabled = False

614

896

if not quiet:

615

897

self.send_changedstate()

616

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

898

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

617

899

return False

618

900

619

901

def __del__(self):

623

905

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

624

906

# and every interval from then on.

625

907

if self.checker_initiator_tag is not None:

626

gobject.source_remove(self.checker_initiator_tag)

627

self.checker_initiator_tag = (gobject.timeout_add

628

(self.interval_milliseconds(),

629

self.start_checker))

908

GObject.source_remove(self.checker_initiator_tag)

909

self.checker_initiator_tag = GObject.timeout_add(

910

int(self.interval.total_seconds() * 1000),

911

self.start_checker)

630

912

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

631

913

if self.disable_initiator_tag is not None:

632

gobject.source_remove(self.disable_initiator_tag)

633

self.disable_initiator_tag = (gobject.timeout_add

634

(self.timeout_milliseconds(),

635

self.disable))

914

GObject.source_remove(self.disable_initiator_tag)

915

self.disable_initiator_tag = GObject.timeout_add(

916

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

636

917

# Also start a new checker *right now*.

637

918

self.start_checker()

638

919

639

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

920

def checker_callback(self, source, condition, connection,

921

command):

640

922

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

641

923

self.checker_callback_tag = None

642

924

self.checker = None

643

if os.WIFEXITED(condition):

644

self.last_checker_status = os.WEXITSTATUS(condition)

925

# Read return code from connection (see call_pipe)

926

returncode = connection.recv()

927

connection.close()

928

929

if returncode >= 0:

930

self.last_checker_status = returncode

931

self.last_checker_signal = None

645

932

if self.last_checker_status == 0:

646

933

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

647

934

vars(self))

648

935

self.checked_ok()

649

936

else:

650

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

651

vars(self))

937

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

652

938

else:

653

939

self.last_checker_status = -1

940

self.last_checker_signal = -returncode

654

941

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

655

942

vars(self))

943

return False

656

944

657

945

def checked_ok(self):

658

946

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

659

947

self.last_checked_ok = datetime.datetime.utcnow()

660

948

self.last_checker_status = 0

949

self.last_checker_signal = None

661

950

self.bump_timeout()

662

951

663

952

def bump_timeout(self, timeout=None):

665

954

if timeout is None:

666

955

timeout = self.timeout

667

956

if self.disable_initiator_tag is not None:

668

gobject.source_remove(self.disable_initiator_tag)

957

GObject.source_remove(self.disable_initiator_tag)

669

958

self.disable_initiator_tag = None

670

959

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

671

self.disable_initiator_tag = (gobject.timeout_add

672

(timedelta_to_milliseconds

673

(timeout), self.disable))

960

self.disable_initiator_tag = GObject.timeout_add(

961

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

674

962

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

675

963

676

964

def need_approval(self):

690

978

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

691

979

# should be.

692

980

693

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

694

try:

695

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

696

except AttributeError:

697

pass

698

except OSError as error:

699

if error.errno != errno.ECHILD:

700

raise

701

else:

702

if pid:

703

logger.warning("Checker was a zombie")

704

gobject.source_remove(self.checker_callback_tag)

705

self.checker_callback(pid, status,

706

self.current_checker_command)

981

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

982

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

983

self.checker.join()

984

self.checker = None

707

985

# Start a new checker if needed

708

986

if self.checker is None:

709

987

# Escape attributes for the shell

710

escaped_attrs = dict(

711

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

712

for attr in

713

self.runtime_expansions)

988

escaped_attrs = {

989

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

990

for attr in self.runtime_expansions }

714

991

try:

715

992

command = self.checker_command % escaped_attrs

716

993

except TypeError as error:

717

994

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

718

self.checker_command, exc_info=error)

719

return True # Try again later

995

self.checker_command,

996

exc_info=error)

997

return True # Try again later

720

998

self.current_checker_command = command

721

try:

722

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

723

command, self.name)

724

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

725

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

726

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

727

# always replaced by /dev/null.)

728

# The exception is when not debugging but nevertheless

729

# running in the foreground; use the previously

730

# created wnull.

731

popen_args = {}

732

if (not self.server_settings["debug"]

733

and self.server_settings["foreground"]):

734

popen_args.update({"stdout": wnull,

735

"stderr": wnull })

736

self.checker = subprocess.Popen(command,

737

close_fds=True,

738

shell=True, cwd="/",

739

**popen_args)

740

except OSError as error:

741

logger.error("Failed to start subprocess",

742

exc_info=error)

743

return True

744

self.checker_callback_tag = (gobject.child_watch_add

745

(self.checker.pid,

746

self.checker_callback,

747

data=command))

748

# The checker may have completed before the gobject

749

# watch was added. Check for this.

750

try:

751

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

752

except OSError as error:

753

if error.errno == errno.ECHILD:

754

# This should never happen

755

logger.error("Child process vanished",

756

exc_info=error)

757

return True

758

raise

759

if pid:

760

gobject.source_remove(self.checker_callback_tag)

761

self.checker_callback(pid, status, command)

762

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

999

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

1000

self.name)

1001

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

1002

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

1003

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

1004

# always replaced by /dev/null.)

1005

# The exception is when not debugging but nevertheless

1006

# running in the foreground; use the previously

1007

# created wnull.

1008

popen_args = { "close_fds": True,

1009

"shell": True,

1010

"cwd": "/" }

1011

if (not self.server_settings["debug"]

1012

and self.server_settings["foreground"]):

1013

popen_args.update({"stdout": wnull,

1014

"stderr": wnull })

1015

pipe = multiprocessing.Pipe(duplex = False)

1016

self.checker = multiprocessing.Process(

1017

target = call_pipe,

1018

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

1019

kwargs = popen_args)

1020

self.checker.start()

1021

self.checker_callback_tag = GObject.io_add_watch(

1022

pipe[0].fileno(), GObject.IO_IN,

1023

self.checker_callback, pipe[0], command)

1024

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

763

1025

return True

764

1026

765

1027

def stop_checker(self):

766

1028

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

767

1029

if self.checker_callback_tag:

768

gobject.source_remove(self.checker_callback_tag)

1030

GObject.source_remove(self.checker_callback_tag)

769

1031

self.checker_callback_tag = None

770

1032

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

771

1033

return

772

1034

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

773

try:

774

self.checker.terminate()

775

#time.sleep(0.5)

776

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

777

# self.checker.kill()

778

except OSError as error:

779

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

780

raise

1035

self.checker.terminate()

781

1036

self.checker = None

782

1037

783

1038

784

def dbus_service_property(dbus_interface, signature="v",

785

access="readwrite", byte_arrays=False):

1039

def dbus_service_property(dbus_interface,

1040

signature="v",

1041

access="readwrite",

1042

byte_arrays=False):

786

1043

"""Decorators for marking methods of a DBusObjectWithProperties to

787

1044

become properties on the D-Bus.

788

1045

797

1054

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

798

1055

if byte_arrays and signature != "ay":

799

1056

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

800

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

1057

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

1058

801

1059

def decorator(func):

802

1060

func._dbus_is_property = True

803

1061

func._dbus_interface = dbus_interface

808

1066

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

809

1067

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

810

1068

return func

1069

811

1070

return decorator

812

1071

813

1072

822

1081

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

823

1082

"false"}

824

1083

"""

1084

825

1085

def decorator(func):

826

1086

func._dbus_is_interface = True

827

1087

func._dbus_interface = dbus_interface

828

1088

func._dbus_name = dbus_interface

829

1089

return func

1090

830

1091

return decorator

831

1092

832

1093

834

1095

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

835

1096

Usage:

836

1097

1098

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

1099

"org.freedesktop.DBus.Property."

1100

"EmitsChangedSignal": "false"})

837

1101

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

838

1102

access="r")

839

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

840

"org.freedesktop.DBus.Property."

841

"EmitsChangedSignal": "false"})

842

1103

def Property_dbus_property(self):

843

1104

return dbus.Boolean(False)

1105

1106

See also the DBusObjectWithAnnotations class.

844

1107

"""

1108

845

1109

def decorator(func):

846

1110

func._dbus_annotations = annotations

847

1111

return func

1112

848

1113

return decorator

849

1114

850

1115

851

1116

class DBusPropertyException(dbus.exceptions.DBusException):

852

1117

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

853

1118

"""

854

def __unicode__(self):

855

return unicode(str(self))

1119

pass

856

1120

857

1121

858

1122

class DBusPropertyAccessException(DBusPropertyException):

867

1131

pass

868

1132

869

1133

870

class DBusObjectWithProperties(dbus.service.Object):

871

"""A D-Bus object with properties.

1134

class DBusObjectWithAnnotations(dbus.service.Object):

1135

"""A D-Bus object with annotations.

872

1136

873

Classes inheriting from this can use the dbus_service_property

874

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

875

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

1137

Classes inheriting from this can use the dbus_annotations

1138

decorator to add annotations to methods or signals.

876

1139

"""

877

1140

878

1141

@staticmethod

882

1145

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

883

1146

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

884

1147

"""

885

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

1148

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

886

1149

False)

887

1150

888

1151

def _get_all_dbus_things(self, thing):

889

1152

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

890

1153

"""

891

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

892

name),

1154

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

893

1155

athing.__get__(self))

894

1156

for cls in self.__class__.__mro__

895

1157

for name, athing in

896

inspect.getmembers(cls,

897

self._is_dbus_thing(thing)))

1158

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

1159

1160

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1161

out_signature = "s",

1162

path_keyword = 'object_path',

1163

connection_keyword = 'connection')

1164

def Introspect(self, object_path, connection):

1165

"""Overloading of standard D-Bus method.

1166

1167

Inserts annotation tags on methods and signals.

1168

"""

1169

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

1170

connection)

1171

try:

1172

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

1173

1174

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

1175

# Add annotation tags

1176

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

1177

for tag in if_tag.getElementsByTagName(typ):

1178

annots = dict()

1179

for name, prop in (self.

1180

_get_all_dbus_things(typ)):

1181

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

1182

and prop._dbus_interface

1183

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

1184

annots.update(getattr(

1185

prop, "_dbus_annotations", {}))

1186

for name, value in annots.items():

1187

ann_tag = document.createElement(

1188

"annotation")

1189

ann_tag.setAttribute("name", name)

1190

ann_tag.setAttribute("value", value)

1191

tag.appendChild(ann_tag)

1192

# Add interface annotation tags

1193

for annotation, value in dict(

1194

itertools.chain.from_iterable(

1195

annotations().items()

1196

for name, annotations

1197

in self._get_all_dbus_things("interface")

1198

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

1199

)).items():

1200

ann_tag = document.createElement("annotation")

1201

ann_tag.setAttribute("name", annotation)

1202

ann_tag.setAttribute("value", value)

1203

if_tag.appendChild(ann_tag)

1204

# Fix argument name for the Introspect method itself

1205

if (if_tag.getAttribute("name")

1206

== dbus.INTROSPECTABLE_IFACE):

1207

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

1208

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

1209

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

1210

if (arg.getAttribute("direction")

1211

== "out"):

1212

arg.setAttribute("name",

1213

"xml_data")

1214

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

1215

document.unlink()

1216

except (AttributeError, xml.dom.DOMException,

1217

xml.parsers.expat.ExpatError) as error:

1218

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

1219

exc_info=error)

1220

return xmlstring

1221

1222

1223

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1224

"""A D-Bus object with properties.

1225

1226

Classes inheriting from this can use the dbus_service_property

1227

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

1228

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

1229

"""

898

1230

899

1231

def _get_dbus_property(self, interface_name, property_name):

900

1232

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

901

1233

property with the specified name and interface.

902

1234

"""

903

for cls in self.__class__.__mro__:

904

for name, value in (inspect.getmembers

905

(cls,

906

self._is_dbus_thing("property"))):

1235

for cls in self.__class__.__mro__:

1236

for name, value in inspect.getmembers(

1237

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

907

1238

if (value._dbus_name == property_name

908

1239

and value._dbus_interface == interface_name):

909

1240

return value.__get__(self)

910

1241

911

1242

# No such property

912

raise DBusPropertyNotFound(self.dbus_object_path + ":"

913

+ interface_name + "."

914

+ property_name)

915

916

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

1243

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

1244

self.dbus_object_path, interface_name, property_name))

1245

1246

@classmethod

1247

def _get_all_interface_names(cls):

1248

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

1249

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

1250

"_dbus_interface", None)

1251

for x in (inspect.getmro(cls))

1252

for attr in dir(x))

1253

if name is not None)

1254

1255

@dbus.service.method(dbus.PROPERTIES_IFACE,

1256

in_signature="ss",

917

1257

out_signature="v")

918

1258

def Get(self, interface_name, property_name):

919

1259

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

938

1278

# signatures other than "ay".

939

1279

if prop._dbus_signature != "ay":

940

1280

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

941

"'ay' signature {0!r}"

1281

"'ay' signature {!r}"

942

1282

.format(prop._dbus_signature))

943

1283

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

944

1284

for byte in value))

945

1285

prop(value)

946

1286

947

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

1287

@dbus.service.method(dbus.PROPERTIES_IFACE,

1288

in_signature="s",

948

1289

out_signature="a{sv}")

949

1290

def GetAll(self, interface_name):

950

1291

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

965

1306

if not hasattr(value, "variant_level"):

966

1307

properties[name] = value

967

1308

continue

968

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

969

value.variant_level+1)

1309

properties[name] = type(value)(

1310

value, variant_level = value.variant_level + 1)

970

1311

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

971

1312

1313

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

1314

def PropertiesChanged(self, interface_name, changed_properties,

1315

invalidated_properties):

1316

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

1317

standard.

1318

"""

1319

pass

1320

972

1321

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

973

1322

out_signature="s",

974

1323

path_keyword='object_path',

978

1327

979

1328

Inserts property tags and interface annotation tags.

980

1329

"""

981

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

982

connection)

1330

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1331

object_path,

1332

connection)

983

1333

try:

984

1334

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

1335

985

1336

def make_tag(document, name, prop):

986

1337

e = document.createElement("property")

987

1338

e.setAttribute("name", name)

988

1339

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

989

1340

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

990

1341

return e

1342

991

1343

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

992

1344

# Add property tags

993

1345

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

996

1348

if prop._dbus_interface

997

1349

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

998

1350

if_tag.appendChild(tag)

999

# Add annotation tags

1000

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

1001

for tag in if_tag.getElementsByTagName(typ):

1002

annots = dict()

1003

for name, prop in (self.

1004

_get_all_dbus_things(typ)):

1005

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

1006

and prop._dbus_interface

1007

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

1008

annots.update(getattr

1009

(prop,

1010

"_dbus_annotations",

1011

{}))

1012

for name, value in annots.iteritems():

1013

ann_tag = document.createElement(

1014

"annotation")

1015

ann_tag.setAttribute("name", name)

1016

ann_tag.setAttribute("value", value)

1017

tag.appendChild(ann_tag)

1018

# Add interface annotation tags

1019

for annotation, value in dict(

1020

itertools.chain.from_iterable(

1021

annotations().iteritems()

1022

for name, annotations in

1023

self._get_all_dbus_things("interface")

1024

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

1025

)).iteritems():

1026

ann_tag = document.createElement("annotation")

1027

ann_tag.setAttribute("name", annotation)

1028

ann_tag.setAttribute("value", value)

1029

if_tag.appendChild(ann_tag)

1351

# Add annotation tags for properties

1352

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

1353

annots = dict()

1354

for name, prop in self._get_all_dbus_things(

1355

"property"):

1356

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

1357

and prop._dbus_interface

1358

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

1359

annots.update(getattr(

1360

prop, "_dbus_annotations", {}))

1361

for name, value in annots.items():

1362

ann_tag = document.createElement(

1363

"annotation")

1364

ann_tag.setAttribute("name", name)

1365

ann_tag.setAttribute("value", value)

1366

tag.appendChild(ann_tag)

1030

1367

# Add the names to the return values for the

1031

1368

# "org.freedesktop.DBus.Properties" methods

1032

1369

if (if_tag.getAttribute("name")

1050

1387

exc_info=error)

1051

1388

return xmlstring

1052

1389

1390

try:

1391

dbus.OBJECT_MANAGER_IFACE

1392

except AttributeError:

1393

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

1394

1395

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1396

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

1397

1398

Classes inheriting from this exposes the standard

1399

GetManagedObjects call and the InterfacesAdded and

1400

InterfacesRemoved signals on the standard

1401

"org.freedesktop.DBus.ObjectManager" interface.

1402

1403

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

1404

manually.

1405

"""

1406

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1407

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

1408

def GetManagedObjects(self):

1409

"""This function must be overridden"""

1410

raise NotImplementedError()

1411

1412

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1413

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

1414

def InterfacesAdded(self, object_path, interfaces_and_properties):

1415

pass

1416

1417

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

1418

def InterfacesRemoved(self, object_path, interfaces):

1419

pass

1420

1421

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1422

out_signature = "s",

1423

path_keyword = 'object_path',

1424

connection_keyword = 'connection')

1425

def Introspect(self, object_path, connection):

1426

"""Overloading of standard D-Bus method.

1427

1428

Override return argument name of GetManagedObjects to be

1429

"objpath_interfaces_and_properties"

1430

"""

1431

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1432

object_path,

1433

connection)

1434

try:

1435

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

1436

1437

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

1438

# Fix argument name for the GetManagedObjects method

1439

if (if_tag.getAttribute("name")

1440

== dbus.OBJECT_MANAGER_IFACE):

1441

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

1442

if (cn.getAttribute("name")

1443

== "GetManagedObjects"):

1444

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

1445

if (arg.getAttribute("direction")

1446

== "out"):

1447

arg.setAttribute(

1448

"name",

1449

"objpath_interfaces"

1450

"_and_properties")

1451

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

1452

document.unlink()

1453

except (AttributeError, xml.dom.DOMException,

1454

xml.parsers.expat.ExpatError) as error:

1455

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

1456

exc_info = error)

1457

return xmlstring

1053

1458

1054

1459

def datetime_to_dbus(dt, variant_level=0):

1055

1460

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

1056

1461

if dt is None:

1057

1462

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

1058

return dbus.String(dt.isoformat(),

1059

variant_level=variant_level)

1463

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

1060

1464

1061

1465

1062

1466

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1082

1486

(from DBusObjectWithProperties) and interfaces (from the

1083

1487

dbus_interface_annotations decorator).

1084

1488

"""

1489

1085

1490

def wrapper(cls):

1086

1491

for orig_interface_name, alt_interface_name in (

1087

alt_interface_names.iteritems()):

1492

alt_interface_names.items()):

1088

1493

attr = {}

1089

1494

interface_names = set()

1090

1495

# Go though all attributes of the class

1092

1497

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

1093

1498

# with the wrong interface name

1094

1499

if (not hasattr(attribute, "_dbus_interface")

1095

or not attribute._dbus_interface

1096

.startswith(orig_interface_name)):

1500

or not attribute._dbus_interface.startswith(

1501

orig_interface_name)):

1097

1502

continue

1098

1503

# Create an alternate D-Bus interface name based on

1099

1504

# the current name

1100

alt_interface = (attribute._dbus_interface

1101

.replace(orig_interface_name,

1102

alt_interface_name))

1505

alt_interface = attribute._dbus_interface.replace(

1506

orig_interface_name, alt_interface_name)

1103

1507

interface_names.add(alt_interface)

1104

1508

# Is this a D-Bus signal?

1105

1509

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

1106

# Extract the original non-method undecorated

1107

# function by black magic

1108

nonmethod_func = (dict(

1510

if sys.version_info.major == 2:

1511

# Extract the original non-method undecorated

1512

# function by black magic

1513

nonmethod_func = (dict(

1109

1514

zip(attribute.func_code.co_freevars,

1110

attribute.__closure__))["func"]

1111

.cell_contents)

1515

attribute.__closure__))

1516

["func"].cell_contents)

1517

else:

1518

nonmethod_func = attribute

1112

1519

# Create a new, but exactly alike, function

1113

1520

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

1114

1521

# with the alternate D-Bus interface name

1115

new_function = (dbus.service.signal

1116

(alt_interface,

1117

attribute._dbus_signature)

1118

(types.FunctionType(

1119

nonmethod_func.func_code,

1120

nonmethod_func.func_globals,

1121

nonmethod_func.func_name,

1122

nonmethod_func.func_defaults,

1123

nonmethod_func.func_closure)))

1522

if sys.version_info.major == 2:

1523

new_function = types.FunctionType(

1524

nonmethod_func.func_code,

1525

nonmethod_func.func_globals,

1526

nonmethod_func.func_name,

1527

nonmethod_func.func_defaults,

1528

nonmethod_func.func_closure)

1529

else:

1530

new_function = types.FunctionType(

1531

nonmethod_func.__code__,

1532

nonmethod_func.__globals__,

1533

nonmethod_func.__name__,

1534

nonmethod_func.__defaults__,

1535

nonmethod_func.__closure__)

1536

new_function = (dbus.service.signal(

1537

alt_interface,

1538

attribute._dbus_signature)(new_function))

1124

1539

# Copy annotations, if any

1125

1540

try:

1126

new_function._dbus_annotations = (

1127

dict(attribute._dbus_annotations))

1541

new_function._dbus_annotations = dict(

1542

attribute._dbus_annotations)

1128

1543

except AttributeError:

1129

1544

pass

1130

1545

# Define a creator of a function to call both the

1135

1550

"""This function is a scope container to pass

1136

1551

func1 and func2 to the "call_both" function

1137

1552

outside of its arguments"""

1553

1554

@functools.wraps(func2)

1138

1555

def call_both(*args, **kwargs):

1139

1556

"""This function will emit two D-Bus

1140

1557

signals by calling func1 and func2"""

1141

1558

func1(*args, **kwargs)

1142

1559

func2(*args, **kwargs)

1560

# Make wrapper function look like a D-Bus signal

1561

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

1562

if name.startswith("_dbus_"):

1563

setattr(call_both, name, attr)

1564

1143

1565

return call_both

1144

1566

# Create the "call_both" function and add it to

1145

1567

# the class

1150

1572

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

1151

1573

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

1152

1574

# to the class.

1153

attr[attrname] = (dbus.service.method

1154

(alt_interface,

1155

attribute._dbus_in_signature,

1156

attribute._dbus_out_signature)

1157

(types.FunctionType

1158

(attribute.func_code,

1159

attribute.func_globals,

1160

attribute.func_name,

1161

attribute.func_defaults,

1162

attribute.func_closure)))

1575

attr[attrname] = (

1576

dbus.service.method(

1577

alt_interface,

1578

attribute._dbus_in_signature,

1579

attribute._dbus_out_signature)

1580

(types.FunctionType(attribute.func_code,

1581

attribute.func_globals,

1582

attribute.func_name,

1583

attribute.func_defaults,

1584

attribute.func_closure)))

1163

1585

# Copy annotations, if any

1164

1586

try:

1165

attr[attrname]._dbus_annotations = (

1166

dict(attribute._dbus_annotations))

1587

attr[attrname]._dbus_annotations = dict(

1588

attribute._dbus_annotations)

1167

1589

except AttributeError:

1168

1590

pass

1169

1591

# Is this a D-Bus property?

1172

1594

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

1173

1595

# property with the alternate D-Bus interface

1174

1596

# name. Add it to the class.

1175

attr[attrname] = (dbus_service_property

1176

(alt_interface,

1177

attribute._dbus_signature,

1178

attribute._dbus_access,

1179

attribute

1180

._dbus_get_args_options

1181

["byte_arrays"])

1182

(types.FunctionType

1183

(attribute.func_code,

1184

attribute.func_globals,

1185

attribute.func_name,

1186

attribute.func_defaults,

1187

attribute.func_closure)))

1597

attr[attrname] = (dbus_service_property(

1598

alt_interface, attribute._dbus_signature,

1599

attribute._dbus_access,

1600

attribute._dbus_get_args_options

1601

["byte_arrays"])

1602

(types.FunctionType(

1603

attribute.func_code,

1604

attribute.func_globals,

1605

attribute.func_name,

1606

attribute.func_defaults,

1607

attribute.func_closure)))

1188

1608

# Copy annotations, if any

1189

1609

try:

1190

attr[attrname]._dbus_annotations = (

1191

dict(attribute._dbus_annotations))

1610

attr[attrname]._dbus_annotations = dict(

1611

attribute._dbus_annotations)

1192

1612

except AttributeError:

1193

1613

pass

1194

1614

# Is this a D-Bus interface?

1197

1617

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

1198

1618

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

1199

1619

# to the class.

1200

attr[attrname] = (dbus_interface_annotations

1201

(alt_interface)

1202

(types.FunctionType

1203

(attribute.func_code,

1204

attribute.func_globals,

1205

attribute.func_name,

1206

attribute.func_defaults,

1207

attribute.func_closure)))

1620

attr[attrname] = (

1621

dbus_interface_annotations(alt_interface)

1622

(types.FunctionType(attribute.func_code,

1623

attribute.func_globals,

1624

attribute.func_name,

1625

attribute.func_defaults,

1626

attribute.func_closure)))

1208

1627

if deprecate:

1209

1628

# Deprecate all alternate interfaces

1210

iname="_AlternateDBusNames_interface_annotation{0}"

1629

iname="_AlternateDBusNames_interface_annotation{}"

1211

1630

for interface_name in interface_names:

1631

1212

1632

@dbus_interface_annotations(interface_name)

1213

1633

def func(self):

1214

1634

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

1215

"true" }

1635

"true" }

1216

1636

# Find an unused name

1217

1637

for aname in (iname.format(i)

1218

1638

for i in itertools.count()):

1222

1642

if interface_names:

1223

1643

# Replace the class with a new subclass of it with

1224

1644

# methods, signals, etc. as created above.

1225

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

1226

(cls,), attr)

1645

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

1646

(cls, ), attr)

1227

1647

return cls

1648

1228

1649

return wrapper

1229

1650

1230

1651

1231

1652

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

1232

"se.bsnet.fukt.Mandos"})

1653

"se.bsnet.fukt.Mandos"})

1233

1654

class ClientDBus(Client, DBusObjectWithProperties):

1234

1655

"""A Client class using D-Bus

1235

1656

1239

1660

"""

1240

1661

1241

1662

runtime_expansions = (Client.runtime_expansions

1242

+ ("dbus_object_path",))

1663

+ ("dbus_object_path", ))

1664

1665

_interface = "se.recompile.Mandos.Client"

1243

1666

1244

1667

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

1245

1668

1248

1671

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

1249

1672

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

1250

1673

# the D-Bus

1251

client_object_name = unicode(self.name).translate(

1674

client_object_name = str(self.name).translate(

1252

1675

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

1253

1676

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

1254

self.dbus_object_path = (dbus.ObjectPath

1255

("/clients/" + client_object_name))

1677

self.dbus_object_path = dbus.ObjectPath(

1678

"/clients/" + client_object_name)

1256

1679

DBusObjectWithProperties.__init__(self, self.bus,

1257

1680

self.dbus_object_path)

1258

1681

1259

def notifychangeproperty(transform_func,

1260

dbus_name, type_func=lambda x: x,

1261

variant_level=1):

1682

def notifychangeproperty(transform_func, dbus_name,

1683

type_func=lambda x: x,

1684

variant_level=1,

1685

invalidate_only=False,

1686

_interface=_interface):

1262

1687

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

1263

1688

its changes to DBus.

1264

1689

1269

1694

to the D-Bus. Default: no transform

1270

1695

variant_level: D-Bus variant level. Default: 1

1271

1696

"""

1272

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

1697

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

1698

1273

1699

def setter(self, value):

1274

1700

if hasattr(self, "dbus_object_path"):

1275

1701

if (not hasattr(self, attrname) or

1276

1702

type_func(getattr(self, attrname, None))

1277

1703

!= type_func(value)):

1278

dbus_value = transform_func(type_func(value),

1279

variant_level

1280

=variant_level)

1281

self.PropertyChanged(dbus.String(dbus_name),

1282

dbus_value)

1704

if invalidate_only:

1705

self.PropertiesChanged(

1706

_interface, dbus.Dictionary(),

1707

dbus.Array((dbus_name, )))

1708

else:

1709

dbus_value = transform_func(

1710

type_func(value),

1711

variant_level = variant_level)

1712

self.PropertyChanged(dbus.String(dbus_name),

1713

dbus_value)

1714

self.PropertiesChanged(

1715

_interface,

1716

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

1717

dbus_value }),

1718

dbus.Array())

1283

1719

setattr(self, attrname, value)

1284

1720

1285

1721

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

1291

1727

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

1292

1728

last_enabled = notifychangeproperty(datetime_to_dbus,

1293

1729

"LastEnabled")

1294

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

1295

type_func = lambda checker:

1296

checker is not None)

1730

checker = notifychangeproperty(

1731

dbus.Boolean, "CheckerRunning",

1732

type_func = lambda checker: checker is not None)

1297

1733

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1298

1734

"LastCheckedOK")

1299

1735

last_checker_status = notifychangeproperty(dbus.Int16,

1302

1738

datetime_to_dbus, "LastApprovalRequest")

1303

1739

approved_by_default = notifychangeproperty(dbus.Boolean,

1304

1740

"ApprovedByDefault")

1305

approval_delay = notifychangeproperty(dbus.UInt64,

1306

"ApprovalDelay",

1307

type_func =

1308

timedelta_to_milliseconds)

1741

approval_delay = notifychangeproperty(

1742

dbus.UInt64, "ApprovalDelay",

1743

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

1309

1744

approval_duration = notifychangeproperty(

1310

1745

dbus.UInt64, "ApprovalDuration",

1311

type_func = timedelta_to_milliseconds)

1746

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

1312

1747

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

1313

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

1314

type_func =

1315

timedelta_to_milliseconds)

1748

timeout = notifychangeproperty(

1749

dbus.UInt64, "Timeout",

1750

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

1316

1751

extended_timeout = notifychangeproperty(

1317

1752

dbus.UInt64, "ExtendedTimeout",

1318

type_func = timedelta_to_milliseconds)

1319

interval = notifychangeproperty(dbus.UInt64,

1320

"Interval",

1321

type_func =

1322

timedelta_to_milliseconds)

1753

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

1754

interval = notifychangeproperty(

1755

dbus.UInt64, "Interval",

1756

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

1323

1757

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

1758

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

1759

invalidate_only=True)

1324

1760

1325

1761

del notifychangeproperty

1326

1762

1333

1769

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

1334

1770

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

1335

1771

1336

def checker_callback(self, pid, condition, command,

1337

*args, **kwargs):

1338

self.checker_callback_tag = None

1339

self.checker = None

1340

if os.WIFEXITED(condition):

1341

exitstatus = os.WEXITSTATUS(condition)

1772

def checker_callback(self, source, condition,

1773

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

1774

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

1775

connection, command, *args,

1776

**kwargs)

1777

exitstatus = self.last_checker_status

1778

if exitstatus >= 0:

1342

1779

# Emit D-Bus signal

1343

1780

self.CheckerCompleted(dbus.Int16(exitstatus),

1344

dbus.Int64(condition),

1781

# This is specific to GNU libC

1782

dbus.Int64(exitstatus << 8),

1345

1783

dbus.String(command))

1346

1784

else:

1347

1785

# Emit D-Bus signal

1348

1786

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

1349

dbus.Int64(condition),

1787

dbus.Int64(

1788

# This is specific to GNU libC

1789

(exitstatus << 8)

1790

| self.last_checker_signal),

1350

1791

dbus.String(command))

1351

1352

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

1353

*args, **kwargs)

1792

return ret

1354

1793

1355

1794

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

1356

1795

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

1368

1807

1369

1808

def approve(self, value=True):

1370

1809

self.approved = value

1371

gobject.timeout_add(timedelta_to_milliseconds

1372

(self.approval_duration),

1373

self._reset_approved)

1810

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

1811

* 1000), self._reset_approved)

1374

1812

self.send_changedstate()

1375

1813

1376

1814

## D-Bus methods, signals & properties

1377

_interface = "se.recompile.Mandos.Client"

1378

1815

1379

1816

## Interfaces

1380

1817

1381

@dbus_interface_annotations(_interface)

1382

def _foo(self):

1383

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

1384

"false"}

1385

1386

1818

## Signals

1387

1819

1388

1820

# CheckerCompleted - signal

1398

1830

pass

1399

1831

1400

1832

# PropertyChanged - signal

1833

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

1401

1834

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

1402

1835

def PropertyChanged(self, property, value):

1403

1836

"D-Bus signal"

1437

1870

self.checked_ok()

1438

1871

1439

1872

# Enable - method

1873

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

1440

1874

@dbus.service.method(_interface)

1441

1875

def Enable(self):

1442

1876

"D-Bus method"

1443

1877

self.enable()

1444

1878

1445

1879

# StartChecker - method

1880

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

1446

1881

@dbus.service.method(_interface)

1447

1882

def StartChecker(self):

1448

1883

"D-Bus method"

1449

1884

self.start_checker()

1450

1885

1451

1886

# Disable - method

1887

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

1452

1888

@dbus.service.method(_interface)

1453

1889

def Disable(self):

1454

1890

"D-Bus method"

1455

1891

self.disable()

1456

1892

1457

1893

# StopChecker - method

1894

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

1458

1895

@dbus.service.method(_interface)

1459

1896

def StopChecker(self):

1460

1897

self.stop_checker()

1467

1904

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

1468

1905

1469

1906

# ApprovedByDefault - property

1470

@dbus_service_property(_interface, signature="b",

1907

@dbus_service_property(_interface,

1908

signature="b",

1471

1909

access="readwrite")

1472

1910

def ApprovedByDefault_dbus_property(self, value=None):

1473

1911

if value is None: # get

1475

1913

self.approved_by_default = bool(value)

1476

1914

1477

1915

# ApprovalDelay - property

1478

@dbus_service_property(_interface, signature="t",

1916

@dbus_service_property(_interface,

1917

signature="t",

1479

1918

access="readwrite")

1480

1919

def ApprovalDelay_dbus_property(self, value=None):

1481

1920

if value is None: # get

1482

return dbus.UInt64(self.approval_delay_milliseconds())

1921

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

1922

* 1000)

1483

1923

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

1484

1924

1485

1925

# ApprovalDuration - property

1486

@dbus_service_property(_interface, signature="t",

1926

@dbus_service_property(_interface,

1927

signature="t",

1487

1928

access="readwrite")

1488

1929

def ApprovalDuration_dbus_property(self, value=None):

1489

1930

if value is None: # get

1490

return dbus.UInt64(timedelta_to_milliseconds(

1491

self.approval_duration))

1931

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

1932

* 1000)

1492

1933

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

1493

1934

1494

1935

# Name - property

1936

@dbus_annotations(

1937

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

1495

1938

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

1496

1939

def Name_dbus_property(self):

1497

1940

return dbus.String(self.name)

1498

1941

1499

1942

# Fingerprint - property

1943

@dbus_annotations(

1944

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

1500

1945

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

1501

1946

def Fingerprint_dbus_property(self):

1502

1947

return dbus.String(self.fingerprint)

1503

1948

1504

1949

# Host - property

1505

@dbus_service_property(_interface, signature="s",

1950

@dbus_service_property(_interface,

1951

signature="s",

1506

1952

access="readwrite")

1507

1953

def Host_dbus_property(self, value=None):

1508

1954

if value is None: # get

1509

1955

return dbus.String(self.host)

1510

self.host = unicode(value)

1956

self.host = str(value)

1511

1957

1512

1958

# Created - property

1959

@dbus_annotations(

1960

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

1513

1961

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

1514

1962

def Created_dbus_property(self):

1515

1963

return datetime_to_dbus(self.created)

1520

1968

return datetime_to_dbus(self.last_enabled)

1521

1969

1522

1970

# Enabled - property

1523

@dbus_service_property(_interface, signature="b",

1971

@dbus_service_property(_interface,

1972

signature="b",

1524

1973

access="readwrite")

1525

1974

def Enabled_dbus_property(self, value=None):

1526

1975

if value is None: # get

1531

1980

self.disable()

1532

1981

1533

1982

# LastCheckedOK - property

1534

@dbus_service_property(_interface, signature="s",

1983

@dbus_service_property(_interface,

1984

signature="s",

1535

1985

access="readwrite")

1536

1986

def LastCheckedOK_dbus_property(self, value=None):

1537

1987

if value is not None:

1540

1990

return datetime_to_dbus(self.last_checked_ok)

1541

1991

1542

1992

# LastCheckerStatus - property

1543

@dbus_service_property(_interface, signature="n",

1544

access="read")

1993

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

1545

1994

def LastCheckerStatus_dbus_property(self):

1546

1995

return dbus.Int16(self.last_checker_status)

1547

1996

1556

2005

return datetime_to_dbus(self.last_approval_request)

1557

2006

1558

2007

# Timeout - property

1559

@dbus_service_property(_interface, signature="t",

2008

@dbus_service_property(_interface,

2009

signature="t",

1560

2010

access="readwrite")

1561

2011

def Timeout_dbus_property(self, value=None):

1562

2012

if value is None: # get

1563

return dbus.UInt64(self.timeout_milliseconds())

2013

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

1564

2014

old_timeout = self.timeout

1565

2015

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

1566

2016

# Reschedule disabling

1574

2024

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

1575

2025

is None):

1576

2026

return

1577

gobject.source_remove(self.disable_initiator_tag)

1578

self.disable_initiator_tag = (

1579

gobject.timeout_add(

1580

timedelta_to_milliseconds(self.expires - now),

1581

self.disable))

2027

GObject.source_remove(self.disable_initiator_tag)

2028

self.disable_initiator_tag = GObject.timeout_add(

2029

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

2030

self.disable)

1582

2031

1583

2032

# ExtendedTimeout - property

1584

@dbus_service_property(_interface, signature="t",

2033

@dbus_service_property(_interface,

2034

signature="t",

1585

2035

access="readwrite")

1586

2036

def ExtendedTimeout_dbus_property(self, value=None):

1587

2037

if value is None: # get

1588

return dbus.UInt64(self.extended_timeout_milliseconds())

2038

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

2039

* 1000)

1589

2040

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

1590

2041

1591

2042

# Interval - property

1592

@dbus_service_property(_interface, signature="t",

2043

@dbus_service_property(_interface,

2044

signature="t",

1593

2045

access="readwrite")

1594

2046

def Interval_dbus_property(self, value=None):

1595

2047

if value is None: # get

1596

return dbus.UInt64(self.interval_milliseconds())

2048

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

1597

2049

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

1598

2050

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

1599

2051

return

1600

2052

if self.enabled:

1601

2053

# Reschedule checker run

1602

gobject.source_remove(self.checker_initiator_tag)

1603

self.checker_initiator_tag = (gobject.timeout_add

1604

(value, self.start_checker))

1605

self.start_checker() # Start one now, too

2054

GObject.source_remove(self.checker_initiator_tag)

2055

self.checker_initiator_tag = GObject.timeout_add(

2056

value, self.start_checker)

2057

self.start_checker() # Start one now, too

1606

2058

1607

2059

# Checker - property

1608

@dbus_service_property(_interface, signature="s",

2060

@dbus_service_property(_interface,

2061

signature="s",

1609

2062

access="readwrite")

1610

2063

def Checker_dbus_property(self, value=None):

1611

2064

if value is None: # get

1612

2065

return dbus.String(self.checker_command)

1613

self.checker_command = unicode(value)

2066

self.checker_command = str(value)

1614

2067

1615

2068

# CheckerRunning - property

1616

@dbus_service_property(_interface, signature="b",

2069

@dbus_service_property(_interface,

2070

signature="b",

1617

2071

access="readwrite")

1618

2072

def CheckerRunning_dbus_property(self, value=None):

1619

2073

if value is None: # get

1624

2078

self.stop_checker()

1625

2079

1626

2080

# ObjectPath - property

2081

@dbus_annotations(

2082

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

2083

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

1627

2084

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

1628

2085

def ObjectPath_dbus_property(self):

1629

2086

return self.dbus_object_path # is already a dbus.ObjectPath

1630

2087

1631

2088

# Secret = property

1632

@dbus_service_property(_interface, signature="ay",

1633

access="write", byte_arrays=True)

2089

@dbus_annotations(

2090

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

2091

"invalidates"})

2092

@dbus_service_property(_interface,

2093

signature="ay",

2094

access="write",

2095

byte_arrays=True)

1634

2096

def Secret_dbus_property(self, value):

1635

self.secret = str(value)

2097

self.secret = bytes(value)

1636

2098

1637

2099

del _interface

1638

2100

1642

2104

self._pipe = child_pipe

1643

2105

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

1644

2106

if not self._pipe.recv():

1645

raise KeyError()

2107

raise KeyError(fpr)

1646

2108

1647

2109

def __getattribute__(self, name):

1648

2110

if name == '_pipe':

1652

2114

if data[0] == 'data':

1653

2115

return data[1]

1654

2116

if data[0] == 'function':

2117

1655

2118

def func(*args, **kwargs):

1656

2119

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

1657

2120

return self._pipe.recv()[1]

2121

1658

2122

return func

1659

2123

1660

2124

def __setattr__(self, name, value):

1672

2136

def handle(self):

1673

2137

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

1674

2138

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

1675

unicode(self.client_address))

2139

str(self.client_address))

1676

2140

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

1677

2141

self.server.child_pipe.fileno())

1678

2142

1679

session = (gnutls.connection

1680

.ClientSession(self.request,

1681

gnutls.connection

1682

.X509Credentials()))

1683

1684

# Note: gnutls.connection.X509Credentials is really a

1685

# generic GnuTLS certificate credentials object so long as

1686

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

1687

# here despite using OpenPGP certificates.

2143

session = gnutls.ClientSession(self.request)

1688

2144

1689

2145

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

1690

2146

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

1694

2150

priority = self.server.gnutls_priority

1695

2151

if priority is None:

1696

2152

priority = "NORMAL"

1697

(gnutls.library.functions

1698

.gnutls_priority_set_direct(session._c_object,

1699

priority, None))

2153

gnutls.priority_set_direct(session._c_object, priority,

2154

None)

1700

2155

1701

2156

# Start communication using the Mandos protocol

1702

2157

# Get protocol number

1712

2167

# Start GnuTLS connection

1713

2168

try:

1714

2169

session.handshake()

1715

except gnutls.errors.GNUTLSError as error:

2170

except gnutls.Error as error:

1716

2171

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

1717

2172

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

1718

2173

# established. Just abandon the request.

1722

2177

approval_required = False

1723

2178

try:

1724

2179

try:

1725

fpr = self.fingerprint(self.peer_certificate

1726

(session))

1727

except (TypeError,

1728

gnutls.errors.GNUTLSError) as error:

2180

fpr = self.fingerprint(

2181

self.peer_certificate(session))

2182

except (TypeError, gnutls.Error) as error:

1729

2183

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

1730

2184

return

1731

2185

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

1744

2198

while True:

1745

2199

if not client.enabled:

1746

2200

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

1747

client.name)

2201

client.name)

1748

2202

if self.server.use_dbus:

1749

2203

# Emit D-Bus signal

1750

2204

client.Rejected("Disabled")

1759

2213

if self.server.use_dbus:

1760

2214

# Emit D-Bus signal

1761

2215

client.NeedApproval(

1762

client.approval_delay_milliseconds(),

1763

client.approved_by_default)

2216

client.approval_delay.total_seconds()

2217

* 1000, client.approved_by_default)

1764

2218

else:

1765

2219

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

1766

2220

client.name)

1772

2226

#wait until timeout or approved

1773

2227

time = datetime.datetime.now()

1774

2228

client.changedstate.acquire()

1775

client.changedstate.wait(

1776

float(timedelta_to_milliseconds(delay)

1777

/ 1000))

2229

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

1778

2230

client.changedstate.release()

1779

2231

time2 = datetime.datetime.now()

1780

2232

if (time2 - time) >= delay:

1791

2243

else:

1792

2244

delay -= time2 - time

1793

2245

1794

sent_size = 0

1795

while sent_size < len(client.secret):

1796

try:

1797

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

1798

except gnutls.errors.GNUTLSError as error:

1799

logger.warning("gnutls send failed",

1800

exc_info=error)

1801

return

1802

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

1803

sent, len(client.secret)

1804

- (sent_size + sent))

1805

sent_size += sent

2246

try:

2247

session.send(client.secret)

2248

except gnutls.Error as error:

2249

logger.warning("gnutls send failed",

2250

exc_info = error)

2251

return

1806

2252

1807

2253

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

1808

2254

# bump the timeout using extended_timeout

1816

2262

client.approvals_pending -= 1

1817

2263

try:

1818

2264

session.bye()

1819

except gnutls.errors.GNUTLSError as error:

2265

except gnutls.Error as error:

1820

2266

logger.warning("GnuTLS bye failed",

1821

2267

exc_info=error)

1822

2268

1824

2270

def peer_certificate(session):

1825

2271

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

1826

2272

# If not an OpenPGP certificate...

1827

if (gnutls.library.functions

1828

.gnutls_certificate_type_get(session._c_object)

1829

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1830

# ...do the normal thing

1831

return session.peer_certificate

2273

if (gnutls.certificate_type_get(session._c_object)

2274

!= gnutls.CRT_OPENPGP):

2275

# ...return invalid data

2276

return b""

1832

2277

list_size = ctypes.c_uint(1)

1833

cert_list = (gnutls.library.functions

1834

.gnutls_certificate_get_peers

2278

cert_list = (gnutls.certificate_get_peers

1835

2279

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

1836

2280

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

1837

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

1838

" certificate")

2281

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

1839

2282

if list_size.value == 0:

1840

2283

return None

1841

2284

cert = cert_list[0]

1845

2288

def fingerprint(openpgp):

1846

2289

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1847

2290

# New GnuTLS "datum" with the OpenPGP public key

1848

datum = (gnutls.library.types

1849

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

1850

ctypes.POINTER

1851

(ctypes.c_ubyte)),

1852

ctypes.c_uint(len(openpgp))))

2291

datum = gnutls.datum_t(

2292

ctypes.cast(ctypes.c_char_p(openpgp),

2293

ctypes.POINTER(ctypes.c_ubyte)),

2294

ctypes.c_uint(len(openpgp)))

1853

2295

# New empty GnuTLS certificate

1854

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1855

(gnutls.library.functions

1856

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2296

crt = gnutls.openpgp_crt_t()

2297

gnutls.openpgp_crt_init(ctypes.byref(crt))

1857

2298

# Import the OpenPGP public key into the certificate

1858

(gnutls.library.functions

1859

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

1860

gnutls.library.constants

1861

.GNUTLS_OPENPGP_FMT_RAW))

2299

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

2300

gnutls.OPENPGP_FMT_RAW)

1862

2301

# Verify the self signature in the key

1863

2302

crtverify = ctypes.c_uint()

1864

(gnutls.library.functions

1865

.gnutls_openpgp_crt_verify_self(crt, 0,

1866

ctypes.byref(crtverify)))

2303

gnutls.openpgp_crt_verify_self(crt, 0,

2304

ctypes.byref(crtverify))

1867

2305

if crtverify.value != 0:

1868

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1869

raise (gnutls.errors.CertificateSecurityError

1870

("Verify failed"))

2306

gnutls.openpgp_crt_deinit(crt)

2307

raise gnutls.CertificateSecurityError("Verify failed")

1871

2308

# New buffer for the fingerprint

1872

2309

buf = ctypes.create_string_buffer(20)

1873

2310

buf_len = ctypes.c_size_t()

1874

2311

# Get the fingerprint from the certificate into the buffer

1875

(gnutls.library.functions

1876

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

1877

ctypes.byref(buf_len)))

2312

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

2313

ctypes.byref(buf_len))

1878

2314

# Deinit the certificate

1879

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2315

gnutls.openpgp_crt_deinit(crt)

1880

2316

# Convert the buffer to a Python bytestring

1881

2317

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

1882

2318

# Convert the bytestring to hexadecimal notation

1886

2322

1887

2323

class MultiprocessingMixIn(object):

1888

2324

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

2325

1889

2326

def sub_process_main(self, request, address):

1890

2327

try:

1891

2328

self.finish_request(request, address)

1903

2340

1904

2341

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1905

2342

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

2343

1906

2344

def process_request(self, request, client_address):

1907

2345

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

1908

2346

1929

2367

interface: None or a network interface name (string)

1930

2368

use_ipv6: Boolean; to use IPv6 or not

1931

2369

"""

2370

1932

2371

def __init__(self, server_address, RequestHandlerClass,

1933

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

2372

interface=None,

2373

use_ipv6=True,

2374

socketfd=None):

1934

2375

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

1935

2376

creating a new one with socket.socket().

1936

2377

"""

1977

2418

self.interface)

1978

2419

else:

1979

2420

try:

1980

self.socket.setsockopt(socket.SOL_SOCKET,

1981

SO_BINDTODEVICE,

1982

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

2421

self.socket.setsockopt(

2422

socket.SOL_SOCKET, SO_BINDTODEVICE,

2423

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

1983

2424

except socket.error as error:

1984

2425

if error.errno == errno.EPERM:

1985

2426

logger.error("No permission to bind to"

2003

2444

self.server_address = (any_address,

2004

2445

self.server_address[1])

2005

2446

elif not self.server_address[1]:

2006

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

2007

0)

2447

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

2008

2448

# if self.interface:

2009

2449

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

2010

2450

# 0, # port

2022

2462

gnutls_priority GnuTLS priority string

2023

2463

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

2024

2464

2025

Assumes a gobject.MainLoop event loop.

2465

Assumes a GObject.MainLoop event loop.

2026

2466

"""

2467

2027

2468

def __init__(self, server_address, RequestHandlerClass,

2028

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

2029

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

2469

interface=None,

2470

use_ipv6=True,

2471

clients=None,

2472

gnutls_priority=None,

2473

use_dbus=True,

2474

socketfd=None):

2030

2475

self.enabled = False

2031

2476

self.clients = clients

2032

2477

if self.clients is None:

2038

2483

interface = interface,

2039

2484

use_ipv6 = use_ipv6,

2040

2485

socketfd = socketfd)

2486

2041

2487

def server_activate(self):

2042

2488

if self.enabled:

2043

2489

return socketserver.TCPServer.server_activate(self)

2047

2493

2048

2494

def add_pipe(self, parent_pipe, proc):

2049

2495

# Call "handle_ipc" for both data and EOF events

2050

gobject.io_add_watch(parent_pipe.fileno(),

2051

gobject.IO_IN | gobject.IO_HUP,

2052

functools.partial(self.handle_ipc,

2053

parent_pipe =

2054

parent_pipe,

2055

proc = proc))

2496

GObject.io_add_watch(

2497

parent_pipe.fileno(),

2498

GObject.IO_IN | GObject.IO_HUP,

2499

functools.partial(self.handle_ipc,

2500

parent_pipe = parent_pipe,

2501

proc = proc))

2056

2502

2057

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

2058

proc = None, client_object=None):

2503

def handle_ipc(self, source, condition,

2504

parent_pipe=None,

2505

proc = None,

2506

client_object=None):

2059

2507

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

2060

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

2508

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

2061

2509

# Wait for other process to exit

2062

2510

proc.join()

2063

2511

return False

2084

2532

parent_pipe.send(False)

2085

2533

return False

2086

2534

2087

gobject.io_add_watch(parent_pipe.fileno(),

2088

gobject.IO_IN | gobject.IO_HUP,

2089

functools.partial(self.handle_ipc,

2090

parent_pipe =

2091

parent_pipe,

2092

proc = proc,

2093

client_object =

2094

client))

2535

GObject.io_add_watch(

2536

parent_pipe.fileno(),

2537

GObject.IO_IN | GObject.IO_HUP,

2538

functools.partial(self.handle_ipc,

2539

parent_pipe = parent_pipe,

2540

proc = proc,

2541

client_object = client))

2095

2542

parent_pipe.send(True)

2096

2543

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

2097

2544

# same fileno

2103

2550

2104

2551

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

2105

2552

funcname)(*args,

2106

**kwargs)))

2553

**kwargs)))

2107

2554

2108

2555

if command == 'getattr':

2109

2556

attrname = request[1]

2110

if callable(client_object.__getattribute__(attrname)):

2111

parent_pipe.send(('function',))

2557

if isinstance(client_object.__getattribute__(attrname),

2558

collections.Callable):

2559

parent_pipe.send(('function', ))

2112

2560

else:

2113

parent_pipe.send(('data', client_object

2114

.__getattribute__(attrname)))

2561

parent_pipe.send((

2562

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

2115

2563

2116

2564

if command == 'setattr':

2117

2565

attrname = request[1]

2148

2596

# avoid excessive use of external libraries.

2149

2597

2150

2598

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

2151

Token = collections.namedtuple("Token",

2152

("regexp", # To match token; if

2153

# "value" is not None,

2154

# must have a "group"

2155

# containing digits

2156

"value", # datetime.timedelta or

2157

# None

2158

"followers")) # Tokens valid after

2159

# this token

2599

Token = collections.namedtuple("Token", (

2600

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

2601

# a "group" containing digits

2602

"value", # datetime.timedelta or None

2603

"followers")) # Tokens valid after this token

2160

2604

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

2161

2605

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

2162

2606

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

2163

2607

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

2164

2608

datetime.timedelta(seconds=1),

2165

frozenset((token_end,)))

2609

frozenset((token_end, )))

2166

2610

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

2167

2611

datetime.timedelta(minutes=1),

2168

2612

frozenset((token_second, token_end)))

2184

2628

frozenset((token_month, token_end)))

2185

2629

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

2186

2630

datetime.timedelta(weeks=1),

2187

frozenset((token_end,)))

2631

frozenset((token_end, )))

2188

2632

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

2189

2633

frozenset((token_year, token_month,

2190

2634

token_day, token_time,

2191

token_week))),

2635

token_week)))

2192

2636

# Define starting values

2193

2637

value = datetime.timedelta() # Value so far

2194

2638

found_token = None

2195

followers = frozenset(token_duration,) # Following valid tokens

2639

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

2196

2640

s = duration # String left to parse

2197

2641

# Loop until end token is found

2198

2642

while found_token is not token_end:

2215

2659

break

2216

2660

else:

2217

2661

# No currently valid tokens were found

2218

raise ValueError("Invalid RFC 3339 duration")

2662

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

2663

.format(duration))

2219

2664

# End token found

2220

2665

return value

2221

2666

2245

2690

timevalue = datetime.timedelta(0)

2246

2691

for s in interval.split():

2247

2692

try:

2248

suffix = unicode(s[-1])

2693

suffix = s[-1]

2249

2694

value = int(s[:-1])

2250

2695

if suffix == "d":

2251

2696

delta = datetime.timedelta(value)

2258

2703

elif suffix == "w":

2259

2704

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

2260

2705

else:

2261

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

2262

.format(suffix))

2706

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

2263

2707

except IndexError as e:

2264

2708

raise ValueError(*(e.args))

2265

2709

timevalue += delta

2282

2726

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

2283

2727

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

2284

2728

raise OSError(errno.ENODEV,

2285

"{0} not a character device"

2729

"{} not a character device"

2286

2730

.format(os.devnull))

2287

2731

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

2288

2732

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

2298

2742

2299

2743

parser = argparse.ArgumentParser()

2300

2744

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

2301

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

2745

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

2302

2746

help="show version number and exit")

2303

2747

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

2304

2748

help="Bind to interface IF")

2354

2798

"port": "",

2355

2799

"debug": "False",

2356

2800

"priority":

2357

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

2801

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

2802

":+SIGN-DSA-SHA256",

2358

2803

"servicename": "Mandos",

2359

2804

"use_dbus": "True",

2360

2805

"use_ipv6": "True",

2364

2809

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

2365

2810

"foreground": "False",

2366

2811

"zeroconf": "True",

2367

}

2812

}

2368

2813

2369

2814

# Parse config file for server-global settings

2370

2815

server_config = configparser.SafeConfigParser(server_defaults)

2371

2816

del server_defaults

2372

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

2373

"mandos.conf"))

2817

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

2374

2818

# Convert the SafeConfigParser object to a dict

2375

2819

server_settings = server_config.defaults()

2376

2820

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

2394

2838

# Override the settings from the config file with command line

2395

2839

# options, if set.

2396

2840

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

2397

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

2398

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

2399

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

2841

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

2842

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

2843

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

2400

2844

value = getattr(options, option)

2401

2845

if value is not None:

2402

2846

server_settings[option] = value

2403

2847

del options

2404

2848

# Force all strings to be unicode

2405

2849

for option in server_settings.keys():

2406

if type(server_settings[option]) is str:

2407

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

2850

if isinstance(server_settings[option], bytes):

2851

server_settings[option] = (server_settings[option]

2852

.decode("utf-8"))

2408

2853

# Force all boolean options to be boolean

2409

2854

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

2410

2855

"foreground", "zeroconf"):

2416

2861

2417

2862

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

2418

2863

2419

if (not server_settings["zeroconf"] and

2420

not (server_settings["port"]

2421

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

2422

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

2423

" Zeroconf")

2864

if (not server_settings["zeroconf"]

2865

and not (server_settings["port"]

2866

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

2867

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

2424

2868

2425

2869

# For convenience

2426

2870

debug = server_settings["debug"]

2442

2886

initlogger(debug, level)

2443

2887

2444

2888

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

2445

syslogger.setFormatter(logging.Formatter

2446

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

2447

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

2448

.format(server_settings

2449

["servicename"])))

2889

syslogger.setFormatter(

2890

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

2891

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

2892

server_settings["servicename"])))

2450

2893

2451

2894

# Parse config file with clients

2452

2895

client_config = configparser.SafeConfigParser(Client

2460

2903

socketfd = None

2461

2904

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

2462

2905

socketfd = server_settings["socket"]

2463

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

2464

server_settings["port"]),

2465

ClientHandler,

2466

interface=(server_settings["interface"]

2467

or None),

2468

use_ipv6=use_ipv6,

2469

gnutls_priority=

2470

server_settings["priority"],

2471

use_dbus=use_dbus,

2472

socketfd=socketfd)

2906

tcp_server = MandosServer(

2907

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

2908

ClientHandler,

2909

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

2910

use_ipv6=use_ipv6,

2911

gnutls_priority=server_settings["priority"],

2912

use_dbus=use_dbus,

2913

socketfd=socketfd)

2473

2914

if not foreground:

2474

2915

pidfilename = "/run/mandos.pid"

2475

2916

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

2476

2917

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

2477

2918

pidfile = None

2478

2919

try:

2479

pidfile = open(pidfilename, "w")

2920

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

2480

2921

except IOError as e:

2481

2922

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

2482

2923

exc_info=e)

2483

2924

2484

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

2925

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

2926

("mandos", "mandos"),

2927

("nobody", "nogroup")):

2485

2928

try:

2486

2929

uid = pwd.getpwnam(name).pw_uid

2487

gid = pwd.getpwnam(name).pw_gid

2930

gid = pwd.getpwnam(group).pw_gid

2488

2931

break

2489

2932

except KeyError:

2490

2933

continue

2503

2946

2504

2947

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

2505

2948

# - GnuTLS manual

2506

gnutls.library.functions.gnutls_global_set_log_level(11)

2949

gnutls.global_set_log_level(11)

2507

2950

2508

@gnutls.library.types.gnutls_log_func

2951

@gnutls.log_func

2509

2952

def debug_gnutls(level, string):

2510

2953

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

2511

2954

2512

(gnutls.library.functions

2513

.gnutls_global_set_log_function(debug_gnutls))

2955

gnutls.global_set_log_function(debug_gnutls)

2514

2956

2515

2957

# Redirect stdin so all checkers get /dev/null

2516

2958

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

2523

2965

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

2524

2966

daemon()

2525

2967

2526

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

2527

# need to inform gobject that threads will be used.

2528

gobject.threads_init()

2968

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

2969

# need to inform GObject that threads will be used.

2970

GObject.threads_init()

2529

2971

2530

2972

global main_loop

2531

2973

# From the Avahi example code

2532

2974

DBusGMainLoop(set_as_default=True)

2533

main_loop = gobject.MainLoop()

2975

main_loop = GObject.MainLoop()

2534

2976

bus = dbus.SystemBus()

2535

2977

# End of Avahi example code

2536

2978

if use_dbus:

2537

2979

try:

2538

2980

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

2539

bus, do_not_queue=True)

2540

old_bus_name = (dbus.service.BusName

2541

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

2542

do_not_queue=True))

2543

except dbus.exceptions.NameExistsException as e:

2981

bus,

2982

do_not_queue=True)

2983

old_bus_name = dbus.service.BusName(

2984

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

2985

do_not_queue=True)

2986

except dbus.exceptions.DBusException as e:

2544

2987

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

2545

2988

use_dbus = False

2546

2989

server_settings["use_dbus"] = False

2547

2990

tcp_server.use_dbus = False

2548

2991

if zeroconf:

2549

2992

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2550

service = AvahiServiceToSyslog(name =

2551

server_settings["servicename"],

2552

servicetype = "_mandos._tcp",

2553

protocol = protocol, bus = bus)

2993

service = AvahiServiceToSyslog(

2994

name = server_settings["servicename"],

2995

servicetype = "_mandos._tcp",

2996

protocol = protocol,

2997

bus = bus)

2554

2998

if server_settings["interface"]:

2555

service.interface = (if_nametoindex

2556

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

2999

service.interface = if_nametoindex(

3000

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

2557

3001

2558

3002

global multiprocessing_manager

2559

3003

multiprocessing_manager = multiprocessing.Manager()

2578

3022

if server_settings["restore"]:

2579

3023

try:

2580

3024

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

2581

clients_data, old_client_settings = (pickle.load

2582

(stored_state))

3025

clients_data, old_client_settings = pickle.load(

3026

stored_state)

2583

3027

os.remove(stored_state_path)

2584

3028

except IOError as e:

2585

3029

if e.errno == errno.ENOENT:

2586

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

2587

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

3030

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

3031

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

2588

3032

else:

2589

3033

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

2590

3034

exc_info=e)

2591

3035

raise

2592

3036

except EOFError as e:

2593

3037

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

2594

"EOFError:", exc_info=e)

3038

"EOFError:",

3039

exc_info=e)

2595

3040

2596

3041

with PGPEngine() as pgp:

2597

for client_name, client in clients_data.iteritems():

3042

for client_name, client in clients_data.items():

2598

3043

# Skip removed clients

2599

3044

if client_name not in client_settings:

2600

3045

continue

2609

3054

# For each value in new config, check if it

2610

3055

# differs from the old config value (Except for

2611

3056

# the "secret" attribute)

2612

if (name != "secret" and

2613

value != old_client_settings[client_name]

2614

[name]):

3057

if (name != "secret"

3058

and (value !=

3059

old_client_settings[client_name][name])):

2615

3060

client[name] = value

2616

3061

except KeyError:

2617

3062

pass

2618

3063

2619

3064

# Clients who has passed its expire date can still be

2620

# enabled if its last checker was successful. Clients

3065

# enabled if its last checker was successful. A Client

2621

3066

# whose checker succeeded before we stored its state is

2622

3067

# assumed to have successfully run all checkers during

2623

3068

# downtime.

2625

3070

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

2626

3071

if not client["last_checked_ok"]:

2627

3072

logger.warning(

2628

"disabling client {0} - Client never "

2629

"performed a successful checker"

2630

.format(client_name))

3073

"disabling client {} - Client never "

3074

"performed a successful checker".format(

3075

client_name))

2631

3076

client["enabled"] = False

2632

3077

elif client["last_checker_status"] != 0:

2633

3078

logger.warning(

2634

"disabling client {0} - Client "

2635

"last checker failed with error code {1}"

2636

.format(client_name,

2637

client["last_checker_status"]))

3079

"disabling client {} - Client last"

3080

" checker failed with error code"

3081

" {}".format(

3082

client_name,

3083

client["last_checker_status"]))

2638

3084

client["enabled"] = False

2639

3085

else:

2640

client["expires"] = (datetime.datetime

2641

.utcnow()

2642

+ client["timeout"])

3086

client["expires"] = (

3087

datetime.datetime.utcnow()

3088

+ client["timeout"])

2643

3089

logger.debug("Last checker succeeded,"

2644

" keeping {0} enabled"

2645

.format(client_name))

3090

" keeping {} enabled".format(

3091

client_name))

2646

3092

try:

2647

client["secret"] = (

2648

pgp.decrypt(client["encrypted_secret"],

2649

client_settings[client_name]

2650

["secret"]))

3093

client["secret"] = pgp.decrypt(

3094

client["encrypted_secret"],

3095

client_settings[client_name]["secret"])

2651

3096

except PGPError:

2652

3097

# If decryption fails, we use secret from new settings

2653

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

2654

.format(client_name))

2655

client["secret"] = (

2656

client_settings[client_name]["secret"])

3098

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

3099

client_name))

3100

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

3101

["secret"])

2657

3102

2658

3103

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

2659

3104

for client_name in (set(old_client_settings)

2664

3109

clients_data[client_name] = client_settings[client_name]

2665

3110

2666

3111

# Create all client objects

2667

for client_name, client in clients_data.iteritems():

3112

for client_name, client in clients_data.items():

2668

3113

tcp_server.clients[client_name] = client_class(

2669

name = client_name, settings = client,

3114

name = client_name,

3115

settings = client,

2670

3116

server_settings = server_settings)

2671

3117

2672

3118

if not tcp_server.clients:

2674

3120

2675

3121

if not foreground:

2676

3122

if pidfile is not None:

3123

pid = os.getpid()

2677

3124

try:

2678

3125

with pidfile:

2679

pid = os.getpid()

2680

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

3126

print(pid, file=pidfile)

2681

3127

except IOError:

2682

3128

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

2683

3129

pidfilename, pid)

2688

3134

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

2689

3135

2690

3136

if use_dbus:

2691

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

2692

"se.bsnet.fukt.Mandos"})

2693

class MandosDBusService(DBusObjectWithProperties):

3137

3138

@alternate_dbus_interfaces(

3139

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

3140

class MandosDBusService(DBusObjectWithObjectManager):

2694

3141

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

3142

2695

3143

def __init__(self):

2696

3144

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

3145

2697

3146

_interface = "se.recompile.Mandos"

2698

3147

2699

@dbus_interface_annotations(_interface)

2700

def _foo(self):

2701

return { "org.freedesktop.DBus.Property"

2702

".EmitsChangedSignal":

2703

"false"}

2704

2705

3148

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

2706

3149

def ClientAdded(self, objpath):

2707

3150

"D-Bus signal"

2712

3155

"D-Bus signal"

2713

3156

pass

2714

3157

3158

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

3159

"true"})

2715

3160

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

2716

3161

def ClientRemoved(self, objpath, name):

2717

3162

"D-Bus signal"

2718

3163

pass

2719

3164

3165

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

3166

"true"})

2720

3167

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

2721

3168

def GetAllClients(self):

2722

3169

"D-Bus method"

2723

return dbus.Array(c.dbus_object_path

2724

for c in

3170

return dbus.Array(c.dbus_object_path for c in

2725

3171

tcp_server.clients.itervalues())

2726

3172

3173

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

3174

"true"})

2727

3175

@dbus.service.method(_interface,

2728

3176

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

2729

3177

def GetAllClientsWithProperties(self):

2730

3178

"D-Bus method"

2731

3179

return dbus.Dictionary(

2732

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

2733

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

3180

{ c.dbus_object_path: c.GetAll(

3181

"se.recompile.Mandos.Client")

3182

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

2734

3183

signature="oa{sv}")

2735

3184

2736

3185

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

2740

3189

if c.dbus_object_path == object_path:

2741

3190

del tcp_server.clients[c.name]

2742

3191

c.remove_from_connection()

2743

# Don't signal anything except ClientRemoved

3192

# Don't signal the disabling

2744

3193

c.disable(quiet=True)

2745

# Emit D-Bus signal

2746

self.ClientRemoved(object_path, c.name)

3194

# Emit D-Bus signal for removal

3195

self.client_removed_signal(c)

2747

3196

return

2748

3197

raise KeyError(object_path)

2749

3198

2750

3199

del _interface

3200

3201

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3202

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

3203

def GetManagedObjects(self):

3204

"""D-Bus method"""

3205

return dbus.Dictionary(

3206

{ client.dbus_object_path:

3207

dbus.Dictionary(

3208

{ interface: client.GetAll(interface)

3209

for interface in

3210

client._get_all_interface_names()})

3211

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

3212

3213

def client_added_signal(self, client):

3214

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

3215

if use_dbus:

3216

# New standard signal

3217

self.InterfacesAdded(

3218

client.dbus_object_path,

3219

dbus.Dictionary(

3220

{ interface: client.GetAll(interface)

3221

for interface in

3222

client._get_all_interface_names()}))

3223

# Old signal

3224

self.ClientAdded(client.dbus_object_path)

3225

3226

def client_removed_signal(self, client):

3227

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

3228

if use_dbus:

3229

# New standard signal

3230

self.InterfacesRemoved(

3231

client.dbus_object_path,

3232

client._get_all_interface_names())

3233

# Old signal

3234

self.ClientRemoved(client.dbus_object_path,

3235

client.name)

2751

3236

2752

3237

mandos_dbus_service = MandosDBusService()

2753

3238

2774

3259

2775

3260

# A list of attributes that can not be pickled

2776

3261

# + secret.

2777

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

2778

"checker", "server_settings"))

2779

for name, typ in (inspect.getmembers

2780

(dbus.service.Object)):

3262

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

3263

"checker", "server_settings" }

3264

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

3265

.Object):

2781

3266

exclude.add(name)

2782

3267

2783

3268

client_dict["encrypted_secret"] = (client

2790

3275

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

2791

3276

2792

3277

try:

2793

with (tempfile.NamedTemporaryFile

2794

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

2795

dir=os.path.dirname(stored_state_path),

2796

delete=False)) as stored_state:

3278

with tempfile.NamedTemporaryFile(

3279

mode='wb',

3280

suffix=".pickle",

3281

prefix='clients-',

3282

dir=os.path.dirname(stored_state_path),

3283

delete=False) as stored_state:

2797

3284

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

2798

tempname=stored_state.name

3285

tempname = stored_state.name

2799

3286

os.rename(tempname, stored_state_path)

2800

3287

except (IOError, OSError) as e:

2801

3288

if not debug:

2804

3291

except NameError:

2805

3292

pass

2806

3293

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

2807

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

3294

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

2808

3295

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

2809

3296

else:

2810

3297

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

2816

3303

name, client = tcp_server.clients.popitem()

2817

3304

if use_dbus:

2818

3305

client.remove_from_connection()

2819

# Don't signal anything except ClientRemoved

3306

# Don't signal the disabling

2820

3307

client.disable(quiet=True)

3308

# Emit D-Bus signal for removal

2821

3309

if use_dbus:

2822

# Emit D-Bus signal

2823

mandos_dbus_service.ClientRemoved(client

2824

.dbus_object_path,

2825

client.name)

3310

mandos_dbus_service.client_removed_signal(client)

2826

3311

client_settings.clear()

2827

3312

2828

3313

atexit.register(cleanup)

2829

3314

2830

3315

for client in tcp_server.clients.itervalues():

2831

3316

if use_dbus:

2832

# Emit D-Bus signal

2833

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3317

# Emit D-Bus signal for adding

3318

mandos_dbus_service.client_added_signal(client)

2834

3319

# Need to initiate checking of clients

2835

3320

if client.enabled:

2836

3321

client.init_checker()

2862

3347

sys.exit(1)

2863

3348

# End of Avahi example code

2864

3349

2865

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

3350

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

2866

3351

lambda *args, **kwargs:

2867

3352

(tcp_server.handle_request

2868

3353

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

2881

3366

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

2882

3367

cleanup()

2883

3368

3369

2884

3370

if __name__ == '__main__':

2885

3371

main()