/mandos/trunk : revision 505.1.11

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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__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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import SocketServer as socketserver

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import socket

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import argparse

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import cPickle as 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 dbus

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import dbus.service

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import ctypes.util

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import xml.dom.minidom

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import inspect

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import GnuPGInterface

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.6.0"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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version = "1.3.1"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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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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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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return interface_index

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

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"""init logger and add loglevel"""

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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"""Exception if encryption/decryption fails"""

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pass

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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.gnupg = GnuPGInterface.GnuPG()

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

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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

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'--quiet',

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'--no-use-agent'])

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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os.rmdir(os.path.join(root, dirname))

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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def encrypt(self, data, password):

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

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

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return ciphertext

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def decrypt(self, data, password):

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

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

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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decrypted_plaintext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return decrypted_plaintext

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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class AvahiError(Exception):

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

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server: D-Bus Server

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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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self.server = None

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

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if self.rename_count >= self.max_renames:

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.GetAlternativeServiceName(self.name))

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

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self.name)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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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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logger.critical("DBusException: %s", 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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def remove(self):

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

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self.entry_group_state_changed))

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'StateChanged', self .entry_group_state_changed))

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

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self.name, self.type)

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self.group.AddService(

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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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

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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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raise AvahiGroupError("State changed: %s"

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% unicode(error))

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def cleanup(self):

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

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if self.group is not None:

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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException):

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dbus.exceptions.DBusException) as e:

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pass

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self.group = None

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self.remove()

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

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else:

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

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def activate(self):

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

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if self.server is None:

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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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"""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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return ret

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def timedelta_to_milliseconds(td):

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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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class Client(object):

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

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Attributes:

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

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

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

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

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

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

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checker_initiator_tag: a gobject event source tag, or None

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

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client_structure: Object describing what attributes a client has

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and is used for storing the client at exit

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current_checker_command: string; current running checker_command

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disable_hook: If set, called by disable() as disable_hook(self)

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disable_initiator_tag: a gobject event source tag, or None

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enabled: bool()

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

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

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

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

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last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, -2 means no checker completed yet.

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

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last_enabled: datetime.datetime(); (UTC)

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

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D-Bus identifiers

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secret: bytestring; sent verbatim (over TLS) to client

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timeout: datetime.timedelta(); How long from last_checked_ok

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until this client is disabled

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extended_timeout: extra long timeout when secret has been sent

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extended_timeout: extra long timeout when password has been sent

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runtime_expansions: Allowed attributes for runtime expansion.

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

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disabled, or None

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"""

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runtime_expansions = ("approval_delay", "approval_duration",

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

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

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"last_approval_request", "last_checked_ok",

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"created", "enabled", "fingerprint",

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"host", "interval", "last_checked_ok",

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

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

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"extended_timeout": "15m",

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"interval": "2m",

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

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"host": "",

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"approval_delay": "0s",

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"approval_duration": "1s",

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"approved_by_default": "True",

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"enabled": "True",

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}

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def timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.timeout)

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return _timedelta_to_milliseconds(self.timeout)

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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.extended_timeout)

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return _timedelta_to_milliseconds(self.extended_timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return timedelta_to_milliseconds(self.interval)

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return _timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

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return timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

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def config_parser(config):

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

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{ client_name: {setting_name: value, ...}, ...}

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with exceptions for any special settings as defined above.

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NOTE: Must be a pure function. Must return the same result

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value given the same arguments.

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"""

483

settings = {}

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for client_name in config.sections():

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section = dict(config.items(client_name))

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client = settings[client_name] = {}

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

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# Reformat values from string types to Python types

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client["approved_by_default"] = config.getboolean(

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client_name, "approved_by_default")

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

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"enabled")

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

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.replace(" ", ""))

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if "secret" in section:

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

499

elif "secfile" in section:

500

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

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(section["secfile"])),

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"rb") as secfile:

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

504

else:

505

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

506

.format(section))

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

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client["extended_timeout"] = string_to_delta(

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section["extended_timeout"])

510

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

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client["approval_delay"] = string_to_delta(

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section["approval_delay"])

513

client["approval_duration"] = string_to_delta(

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section["approval_duration"])

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client["checker_command"] = section["checker"]

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client["last_approval_request"] = None

517

client["last_checked_ok"] = None

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client["last_checker_status"] = -2

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return settings

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522

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

332

return _timedelta_to_milliseconds(self.approval_delay)

333

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def __init__(self, name = None, disable_hook=None, config=None):

335

"""Note: the 'checker' key in 'config' sets the

336

'checker_command' attribute and *not* the 'checker'

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attribute."""

523

338

self.name = name

524

# adding all client settings

525

for setting, value in settings.iteritems():

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setattr(self, setting, value)

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if self.enabled:

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if not hasattr(self, "last_enabled"):

530

self.last_enabled = datetime.datetime.utcnow()

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if not hasattr(self, "expires"):

532

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

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+ self.timeout)

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else:

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self.last_enabled = None

536

self.expires = None

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if config is None:

340

config = {}

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

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# Uppercase and remove spaces from fingerprint for later

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# comparison purposes with return value from the fingerprint()

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# function

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self.fingerprint = (config["fingerprint"].upper()

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.replace(" ", ""))

542

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

543

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

544

datetime.datetime.utcnow())

545

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# attributes specific for this server instance

348

if "secret" in config:

349

self.secret = config["secret"].decode("base64")

350

elif "secfile" in config:

351

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

352

(config["secfile"])),

353

"rb") as secfile:

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self.secret = secfile.read()

355

else:

356

raise TypeError("No secret or secfile for client %s"

357

% self.name)

358

self.host = config.get("host", "")

359

self.created = datetime.datetime.utcnow()

360

self.enabled = False

361

self.last_approval_request = None

362

self.last_enabled = None

363

self.last_checked_ok = None

364

self.timeout = string_to_delta(config["timeout"])

365

self.extended_timeout = string_to_delta(config

366

["extended_timeout"])

367

self.interval = string_to_delta(config["interval"])

368

self.disable_hook = disable_hook

547

369

self.checker = None

548

370

self.checker_initiator_tag = None

549

371

self.disable_initiator_tag = None

372

self.expires = None

550

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self.checker_callback_tag = None

374

self.checker_command = config["checker"]

551

375

self.current_checker_command = None

552

self.approved = None

376

self.last_connect = None

377

self._approved = None

378

self.approved_by_default = config.get("approved_by_default",

379

True)

553

380

self.approvals_pending = 0

381

self.approval_delay = string_to_delta(

382

config["approval_delay"])

383

self.approval_duration = string_to_delta(

384

config["approval_duration"])

554

385

self.changedstate = (multiprocessing_manager

555

386

.Condition(multiprocessing_manager

556

387

.Lock()))

557

self.client_structure = [attr for attr in

558

self.__dict__.iterkeys()

559

if not attr.startswith("_")]

560

self.client_structure.append("client_structure")

561

562

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

563

lambda obj:

564

isinstance(obj,

565

property)):

566

if not name.startswith("_"):

567

self.client_structure.append(name)

568

388

569

# Send notice to process children that client state has changed

570

389

def send_changedstate(self):

571

with self.changedstate:

572

self.changedstate.notify_all()

390

self.changedstate.acquire()

391

self.changedstate.notify_all()

392

self.changedstate.release()

573

393

574

394

def enable(self):

575

395

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

576

396

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

577

397

# Already enabled

578

398

return

399

self.send_changedstate()

400

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

401

# and every interval from then on.

402

self.checker_initiator_tag = (gobject.timeout_add

403

(self.interval_milliseconds(),

404

self.start_checker))

405

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

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406

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

407

self.disable_initiator_tag = (gobject.timeout_add

408

(self.timeout_milliseconds(),

409

self.disable))

580

410

self.enabled = True

581

411

self.last_enabled = datetime.datetime.utcnow()

582

self.init_checker()

583

self.send_changedstate()

412

# Also start a new checker *right now*.

413

self.start_checker()

584

414

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415

def disable(self, quiet=True):

586

416

"""Disable this client."""

587

417

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

588

418

return False

589

419

if not quiet:

420

self.send_changedstate()

421

if not quiet:

590

422

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

591

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

423

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

592

424

gobject.source_remove(self.disable_initiator_tag)

593

425

self.disable_initiator_tag = None

594

426

self.expires = None

595

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

427

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

596

428

gobject.source_remove(self.checker_initiator_tag)

597

429

self.checker_initiator_tag = None

598

430

self.stop_checker()

431

if self.disable_hook:

432

self.disable_hook(self)

599

433

self.enabled = False

600

if not quiet:

601

self.send_changedstate()

602

434

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

603

435

return False

604

436

605

437

def __del__(self):

438

self.disable_hook = None

606

439

self.disable()

607

440

608

def init_checker(self):

609

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

610

# and every interval from then on.

611

if self.checker_initiator_tag is not None:

612

gobject.source_remove(self.checker_initiator_tag)

613

self.checker_initiator_tag = (gobject.timeout_add

614

(self.interval_milliseconds(),

615

self.start_checker))

616

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

617

if self.disable_initiator_tag is not None:

618

gobject.source_remove(self.disable_initiator_tag)

619

self.disable_initiator_tag = (gobject.timeout_add

620

(self.timeout_milliseconds(),

621

self.disable))

622

# Also start a new checker *right now*.

623

self.start_checker()

624

625

441

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

626

442

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

627

443

self.checker_callback_tag = None

628

444

self.checker = None

629

445

if os.WIFEXITED(condition):

630

self.last_checker_status = os.WEXITSTATUS(condition)

631

if self.last_checker_status == 0:

446

exitstatus = os.WEXITSTATUS(condition)

447

if exitstatus == 0:

632

448

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

633

449

vars(self))

634

450

self.checked_ok()

636

452

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

637

453

vars(self))

638

454

else:

639

self.last_checker_status = -1

640

455

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

641

456

vars(self))

642

457

643

def checked_ok(self):

644

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

645

self.last_checked_ok = datetime.datetime.utcnow()

646

self.last_checker_status = 0

647

self.bump_timeout()

648

649

def bump_timeout(self, timeout=None):

650

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

458

def checked_ok(self, timeout=None):

459

"""Bump up the timeout for this client.

460

461

This should only be called when the client has been seen,

462

alive and well.

463

"""

651

464

if timeout is None:

652

465

timeout = self.timeout

653

if self.disable_initiator_tag is not None:

654

gobject.source_remove(self.disable_initiator_tag)

655

self.disable_initiator_tag = None

656

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

657

self.disable_initiator_tag = (gobject.timeout_add

658

(timedelta_to_milliseconds

659

(timeout), self.disable))

660

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

466

self.last_checked_ok = datetime.datetime.utcnow()

467

gobject.source_remove(self.disable_initiator_tag)

468

self.disable_initiator_tag = (gobject.timeout_add

469

(_timedelta_to_milliseconds

470

(timeout), self.disable))

471

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

661

472

662

473

def need_approval(self):

663

474

self.last_approval_request = datetime.datetime.utcnow()

668

479

If a checker already exists, leave it running and do

669

480

nothing."""

670

481

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

671

# did that, and if a checker (for some reason) started running

672

# slowly and taking more than 'interval' time, then the client

673

# would inevitably timeout, since no checker would get a

674

# chance to run to completion. If we instead leave running

482

# did that, then if a checker (for some reason) started

483

# running slowly and taking more than 'interval' time, the

484

# client would inevitably timeout, since no checker would get

485

# a chance to run to completion. If we instead leave running

675

486

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

676

487

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

677

488

# should be.

691

502

self.current_checker_command)

692

503

# Start a new checker if needed

693

504

if self.checker is None:

694

# Escape attributes for the shell

695

escaped_attrs = dict(

696

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

697

for attr in

698

self.runtime_expansions)

699

505

try:

700

command = self.checker_command % escaped_attrs

701

except TypeError as error:

702

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

703

self.checker_command, exc_info=error)

704

return True # Try again later

506

# In case checker_command has exactly one % operator

507

command = self.checker_command % self.host

508

except TypeError:

509

# Escape attributes for the shell

510

escaped_attrs = dict(

511

(attr,

512

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

513

errors=

514

'replace')))

515

for attr in

516

self.runtime_expansions)

517

518

try:

519

command = self.checker_command % escaped_attrs

520

except TypeError as error:

521

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

522

' %s', self.checker_command, error)

523

return True # Try again later

705

524

self.current_checker_command = command

706

525

try:

707

526

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

713

532

self.checker = subprocess.Popen(command,

714

533

close_fds=True,

715

534

shell=True, cwd="/")

535

self.checker_callback_tag = (gobject.child_watch_add

536

(self.checker.pid,

537

self.checker_callback,

538

data=command))

539

# The checker may have completed before the gobject

540

# watch was added. Check for this.

541

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

542

if pid:

543

gobject.source_remove(self.checker_callback_tag)

544

self.checker_callback(pid, status, command)

716

545

except OSError as error:

717

logger.error("Failed to start subprocess",

718

exc_info=error)

719

self.checker_callback_tag = (gobject.child_watch_add

720

(self.checker.pid,

721

self.checker_callback,

722

data=command))

723

# The checker may have completed before the gobject

724

# watch was added. Check for this.

725

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

726

if pid:

727

gobject.source_remove(self.checker_callback_tag)

728

self.checker_callback(pid, status, command)

546

logger.error("Failed to start subprocess: %s",

547

error)

729

548

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

730

549

return True

731

550

738

557

return

739

558

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

740

559

try:

741

self.checker.terminate()

560

os.kill(self.checker.pid, signal.SIGTERM)

742

561

#time.sleep(0.5)

743

562

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

744

# self.checker.kill()

563

# os.kill(self.checker.pid, signal.SIGKILL)

745

564

except OSError as error:

746

565

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

747

566

raise

764

583

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

765

584

if byte_arrays and signature != "ay":

766

585

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

767

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

586

" signature %r" % signature)

768

587

def decorator(func):

769

588

func._dbus_is_property = True

770

589

func._dbus_interface = dbus_interface

778

597

return decorator

779

598

780

599

781

def dbus_interface_annotations(dbus_interface):

782

"""Decorator for marking functions returning interface annotations

783

784

Usage:

785

786

@dbus_interface_annotations("org.example.Interface")

787

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

788

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

789

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

790

"false"}

791

"""

792

def decorator(func):

793

func._dbus_is_interface = True

794

func._dbus_interface = dbus_interface

795

func._dbus_name = dbus_interface

796

return func

797

return decorator

798

799

800

def dbus_annotations(annotations):

801

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

802

Usage:

803

804

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

805

access="r")

806

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

807

"org.freedesktop.DBus.Property."

808

"EmitsChangedSignal": "false"})

809

def Property_dbus_property(self):

810

return dbus.Boolean(False)

811

"""

812

def decorator(func):

813

func._dbus_annotations = annotations

814

return func

815

return decorator

816

817

818

600

class DBusPropertyException(dbus.exceptions.DBusException):

819

601

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

820

602

"""

843

625

"""

844

626

845

627

@staticmethod

846

def _is_dbus_thing(thing):

847

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

848

849

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

850

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

851

"""

852

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

853

False)

628

def _is_dbus_property(obj):

629

return getattr(obj, "_dbus_is_property", False)

854

630

855

def _get_all_dbus_things(self, thing):

631

def _get_all_dbus_properties(self):

856

632

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

857

633

"""

858

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

859

name),

860

athing.__get__(self))

634

return ((prop.__get__(self)._dbus_name, prop.__get__(self))

861

635

for cls in self.__class__.__mro__

862

for name, athing in

863

inspect.getmembers(cls,

864

self._is_dbus_thing(thing)))

636

for name, prop in

637

inspect.getmembers(cls, self._is_dbus_property))

865

638

866

639

def _get_dbus_property(self, interface_name, property_name):

867

640

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

869

642

"""

870

643

for cls in self.__class__.__mro__:

871

644

for name, value in (inspect.getmembers

872

(cls,

873

self._is_dbus_thing("property"))):

645

(cls, self._is_dbus_property)):

874

646

if (value._dbus_name == property_name

875

647

and value._dbus_interface == interface_name):

876

648

return value.__get__(self)

905

677

# signatures other than "ay".

906

678

if prop._dbus_signature != "ay":

907

679

raise ValueError

908

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

909

for byte in value))

680

value = dbus.ByteArray(''.join(unichr(byte)

681

for byte in value))

910

682

prop(value)

911

683

912

684

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

917

689

918

690

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

919

691

"""

920

properties = {}

921

for name, prop in self._get_all_dbus_things("property"):

692

all = {}

693

for name, prop in self._get_all_dbus_properties():

922

694

if (interface_name

923

695

and interface_name != prop._dbus_interface):

924

696

# Interface non-empty but did not match

928

700

continue

929

701

value = prop()

930

702

if not hasattr(value, "variant_level"):

931

properties[name] = value

703

all[name] = value

932

704

continue

933

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

934

value.variant_level+1)

935

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

705

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

706

value.variant_level+1)

707

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

936

708

937

709

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

938

710

out_signature="s",

939

711

path_keyword='object_path',

940

712

connection_keyword='connection')

941

713

def Introspect(self, object_path, connection):

942

"""Overloading of standard D-Bus method.

943

944

Inserts property tags and interface annotation tags.

714

"""Standard D-Bus method, overloaded to insert property tags.

945

715

"""

946

716

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

947

717

connection)

954

724

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

955

725

return e

956

726

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

957

# Add property tags

958

727

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

959

728

for name, prop

960

in self._get_all_dbus_things("property")

729

in self._get_all_dbus_properties()

961

730

if prop._dbus_interface

962

731

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

963

732

if_tag.appendChild(tag)

964

# Add annotation tags

965

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

966

for tag in if_tag.getElementsByTagName(typ):

967

annots = dict()

968

for name, prop in (self.

969

_get_all_dbus_things(typ)):

970

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

971

and prop._dbus_interface

972

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

973

annots.update(getattr

974

(prop,

975

"_dbus_annotations",

976

{}))

977

for name, value in annots.iteritems():

978

ann_tag = document.createElement(

979

"annotation")

980

ann_tag.setAttribute("name", name)

981

ann_tag.setAttribute("value", value)

982

tag.appendChild(ann_tag)

983

# Add interface annotation tags

984

for annotation, value in dict(

985

itertools.chain.from_iterable(

986

annotations().iteritems()

987

for name, annotations in

988

self._get_all_dbus_things("interface")

989

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

990

)).iteritems():

991

ann_tag = document.createElement("annotation")

992

ann_tag.setAttribute("name", annotation)

993

ann_tag.setAttribute("value", value)

994

if_tag.appendChild(ann_tag)

995

733

# Add the names to the return values for the

996

734

# "org.freedesktop.DBus.Properties" methods

997

735

if (if_tag.getAttribute("name")

1012

750

except (AttributeError, xml.dom.DOMException,

1013

751

xml.parsers.expat.ExpatError) as error:

1014

752

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

1015

exc_info=error)

753

error)

1016

754

return xmlstring

1017

755

1018

756

1019

def datetime_to_dbus(dt, variant_level=0):

757

def datetime_to_dbus (dt, variant_level=0):

1020

758

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

1021

759

if dt is None:

1022

760

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

1023

761

return dbus.String(dt.isoformat(),

1024

762

variant_level=variant_level)

1025

763

1026

1027

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1028

"""A class decorator; applied to a subclass of

1029

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

1030

interface names according to the "alt_interface_names" mapping.

1031

Usage:

1032

1033

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

1034

"net.example.AlternateInterface"})

1035

class SampleDBusObject(dbus.service.Object):

1036

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

1037

def SampleDBusMethod():

1038

pass

1039

1040

The above "SampleDBusMethod" on "SampleDBusObject" will be

1041

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

1042

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

1043

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

1044

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

1045

1046

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

1047

(from DBusObjectWithProperties) and interfaces (from the

1048

dbus_interface_annotations decorator).

764

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

765

.__metaclass__):

766

"""Applied to an empty subclass of a D-Bus object, this metaclass

767

will add additional D-Bus attributes matching a certain pattern.

1049

768

"""

1050

def wrapper(cls):

1051

for orig_interface_name, alt_interface_name in (

1052

alt_interface_names.iteritems()):

1053

attr = {}

1054

interface_names = set()

1055

# Go though all attributes of the class

1056

for attrname, attribute in inspect.getmembers(cls):

769

def __new__(mcs, name, bases, attr):

770

# Go through all the base classes which could have D-Bus

771

# methods, signals, or properties in them

772

for base in (b for b in bases

773

if issubclass(b, dbus.service.Object)):

774

# Go though all attributes of the base class

775

for attrname, attribute in inspect.getmembers(base):

1057

776

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

1058

777

# with the wrong interface name

1059

778

if (not hasattr(attribute, "_dbus_interface")

1060

779

or not attribute._dbus_interface

1061

.startswith(orig_interface_name)):

780

.startswith("se.recompile.Mandos")):

1062

781

continue

1063

782

# Create an alternate D-Bus interface name based on

1064

783

# the current name

1065

784

alt_interface = (attribute._dbus_interface

1066

.replace(orig_interface_name,

1067

alt_interface_name))

1068

interface_names.add(alt_interface)

785

.replace("se.recompile.Mandos",

786

"se.bsnet.fukt.Mandos"))

1069

787

# Is this a D-Bus signal?

1070

788

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

1071

789

# Extract the original non-method function by

1086

804

nonmethod_func.func_name,

1087

805

nonmethod_func.func_defaults,

1088

806

nonmethod_func.func_closure)))

1089

# Copy annotations, if any

1090

try:

1091

new_function._dbus_annotations = (

1092

dict(attribute._dbus_annotations))

1093

except AttributeError:

1094

pass

1095

807

# Define a creator of a function to call both the

1096

# original and alternate functions, so both the

1097

# original and alternate signals gets sent when

1098

# the function is called

808

# old and new functions, so both the old and new

809

# signals gets sent when the function is called

1099

810

def fixscope(func1, func2):

1100

811

"""This function is a scope container to pass

1101

812

func1 and func2 to the "call_both" function

1108

819

return call_both

1109

820

# Create the "call_both" function and add it to

1110

821

# the class

1111

attr[attrname] = fixscope(attribute, new_function)

822

attr[attrname] = fixscope(attribute,

823

new_function)

1112

824

# Is this a D-Bus method?

1113

825

elif getattr(attribute, "_dbus_is_method", False):

1114

826

# Create a new, but exactly alike, function

1125

837

attribute.func_name,

1126

838

attribute.func_defaults,

1127

839

attribute.func_closure)))

1128

# Copy annotations, if any

1129

try:

1130

attr[attrname]._dbus_annotations = (

1131

dict(attribute._dbus_annotations))

1132

except AttributeError:

1133

pass

1134

840

# Is this a D-Bus property?

1135

841

elif getattr(attribute, "_dbus_is_property", False):

1136

842

# Create a new, but exactly alike, function

1150

856

attribute.func_name,

1151

857

attribute.func_defaults,

1152

858

attribute.func_closure)))

1153

# Copy annotations, if any

1154

try:

1155

attr[attrname]._dbus_annotations = (

1156

dict(attribute._dbus_annotations))

1157

except AttributeError:

1158

pass

1159

# Is this a D-Bus interface?

1160

elif getattr(attribute, "_dbus_is_interface", False):

1161

# Create a new, but exactly alike, function

1162

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

1163

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

1164

# to the class.

1165

attr[attrname] = (dbus_interface_annotations

1166

(alt_interface)

1167

(types.FunctionType

1168

(attribute.func_code,

1169

attribute.func_globals,

1170

attribute.func_name,

1171

attribute.func_defaults,

1172

attribute.func_closure)))

1173

if deprecate:

1174

# Deprecate all alternate interfaces

1175

iname="_AlternateDBusNames_interface_annotation{0}"

1176

for interface_name in interface_names:

1177

@dbus_interface_annotations(interface_name)

1178

def func(self):

1179

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

1180

"true" }

1181

# Find an unused name

1182

for aname in (iname.format(i)

1183

for i in itertools.count()):

1184

if aname not in attr:

1185

attr[aname] = func

1186

break

1187

if interface_names:

1188

# Replace the class with a new subclass of it with

1189

# methods, signals, etc. as created above.

1190

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

1191

(cls,), attr)

1192

return cls

1193

return wrapper

1194

1195

1196

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

1197

"se.bsnet.fukt.Mandos"})

859

return type.__new__(mcs, name, bases, attr)

860

1198

861

class ClientDBus(Client, DBusObjectWithProperties):

1199

862

"""A Client class using D-Bus

1200

863

1209

872

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

1210

873

1211

874

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

875

self._approvals_pending = 0

1212

876

self.bus = bus

1213

877

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

1214

878

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

1220

884

("/clients/" + client_object_name))

1221

885

DBusObjectWithProperties.__init__(self, self.bus,

1222

886

self.dbus_object_path)

1223

887

1224

888

def notifychangeproperty(transform_func,

1225

889

dbus_name, type_func=lambda x: x,

1226

890

variant_level=1):

1227

891

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

1228

892

its changes to DBus.

1229

1230

transform_fun: Function that takes a value and a variant_level

1231

and transforms it to a D-Bus type.

893

894

transform_fun: Function that takes a value and transforms it

895

to a D-Bus type.

1232

896

dbus_name: D-Bus name of the variable

1233

897

type_func: Function that transform the value before sending it

1234

898

to the D-Bus. Default: no transform

1241

905

type_func(getattr(self, attrname, None))

1242

906

!= type_func(value)):

1243

907

dbus_value = transform_func(type_func(value),

1244

variant_level

1245

=variant_level)

908

variant_level)

1246

909

self.PropertyChanged(dbus.String(dbus_name),

1247

910

dbus_value)

1248

911

setattr(self, attrname, value)

1249

912

1250

913

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

1251

914

915

1252

916

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1253

917

approvals_pending = notifychangeproperty(dbus.Boolean,

1254

918

"ApprovalPending",

1261

925

checker is not None)

1262

926

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1263

927

"LastCheckedOK")

1264

last_checker_status = notifychangeproperty(dbus.Int16,

1265

"LastCheckerStatus")

1266

928

last_approval_request = notifychangeproperty(

1267

929

datetime_to_dbus, "LastApprovalRequest")

1268

930

approved_by_default = notifychangeproperty(dbus.Boolean,

1269

931

"ApprovedByDefault")

1270

approval_delay = notifychangeproperty(dbus.UInt64,

932

approval_delay = notifychangeproperty(dbus.UInt16,

1271

933

"ApprovalDelay",

1272

934

type_func =

1273

timedelta_to_milliseconds)

935

_timedelta_to_milliseconds)

1274

936

approval_duration = notifychangeproperty(

1275

dbus.UInt64, "ApprovalDuration",

1276

type_func = timedelta_to_milliseconds)

937

dbus.UInt16, "ApprovalDuration",

938

type_func = _timedelta_to_milliseconds)

1277

939

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

1278

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

940

timeout = notifychangeproperty(dbus.UInt16, "Timeout",

1279

941

type_func =

1280

timedelta_to_milliseconds)

942

_timedelta_to_milliseconds)

1281

943

extended_timeout = notifychangeproperty(

1282

dbus.UInt64, "ExtendedTimeout",

1283

type_func = timedelta_to_milliseconds)

1284

interval = notifychangeproperty(dbus.UInt64,

944

dbus.UInt16, "ExtendedTimeout",

945

type_func = _timedelta_to_milliseconds)

946

interval = notifychangeproperty(dbus.UInt16,

1285

947

"Interval",

1286

948

type_func =

1287

timedelta_to_milliseconds)

949

_timedelta_to_milliseconds)

1288

950

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

1289

951

1290

952

del notifychangeproperty

1332

994

return r

1333

995

1334

996

def _reset_approved(self):

1335

self.approved = None

997

self._approved = None

1336

998

return False

1337

999

1338

1000

def approve(self, value=True):

1339

self.approved = value

1340

gobject.timeout_add(timedelta_to_milliseconds

1001

self.send_changedstate()

1002

self._approved = value

1003

gobject.timeout_add(_timedelta_to_milliseconds

1341

1004

(self.approval_duration),

1342

1005

self._reset_approved)

1343

self.send_changedstate()

1006

1344

1007

1345

1008

## D-Bus methods, signals & properties

1346

1009

_interface = "se.recompile.Mandos.Client"

1347

1010

1348

## Interfaces

1349

1350

@dbus_interface_annotations(_interface)

1351

def _foo(self):

1352

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

1353

"false"}

1354

1355

1011

## Signals

1356

1012

1357

1013

# CheckerCompleted - signal

1456

1112

access="readwrite")

1457

1113

def ApprovalDuration_dbus_property(self, value=None):

1458

1114

if value is None: # get

1459

return dbus.UInt64(timedelta_to_milliseconds(

1115

return dbus.UInt64(_timedelta_to_milliseconds(

1460

1116

self.approval_duration))

1461

1117

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

1462

1118

1476

1132

def Host_dbus_property(self, value=None):

1477

1133

if value is None: # get

1478

1134

return dbus.String(self.host)

1479

self.host = unicode(value)

1135

self.host = value

1480

1136

1481

1137

# Created - property

1482

1138

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

1483

1139

def Created_dbus_property(self):

1484

return datetime_to_dbus(self.created)

1140

return dbus.String(datetime_to_dbus(self.created))

1485

1141

1486

1142

# LastEnabled - property

1487

1143

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

1508

1164

return

1509

1165

return datetime_to_dbus(self.last_checked_ok)

1510

1166

1511

# LastCheckerStatus - property

1512

@dbus_service_property(_interface, signature="n",

1513

access="read")

1514

def LastCheckerStatus_dbus_property(self):

1515

return dbus.Int16(self.last_checker_status)

1516

1517

1167

# Expires - property

1518

1168

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

1519

1169

def Expires_dbus_property(self):

1530

1180

def Timeout_dbus_property(self, value=None):

1531

1181

if value is None: # get

1532

1182

return dbus.UInt64(self.timeout_milliseconds())

1533

old_timeout = self.timeout

1534

1183

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

1535

# Reschedule disabling

1536

if self.enabled:

1537

now = datetime.datetime.utcnow()

1538

self.expires += self.timeout - old_timeout

1539

if self.expires <= now:

1540

# The timeout has passed

1541

self.disable()

1542

else:

1543

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

1544

is None):

1545

return

1546

gobject.source_remove(self.disable_initiator_tag)

1547

self.disable_initiator_tag = (

1548

gobject.timeout_add(

1549

timedelta_to_milliseconds(self.expires - now),

1550

self.disable))

1184

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

1185

return

1186

# Reschedule timeout

1187

gobject.source_remove(self.disable_initiator_tag)

1188

self.disable_initiator_tag = None

1189

self.expires = None

1190

time_to_die = (self.

1191

_timedelta_to_milliseconds((self

1192

.last_checked_ok

1193

+ self.timeout)

1194

- datetime.datetime

1195

.utcnow()))

1196

if time_to_die <= 0:

1197

# The timeout has passed

1198

self.disable()

1199

else:

1200

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

1201

+ datetime.timedelta(milliseconds =

1202

time_to_die))

1203

self.disable_initiator_tag = (gobject.timeout_add

1204

(time_to_die, self.disable))

1551

1205

1552

1206

# ExtendedTimeout - property

1553

1207

@dbus_service_property(_interface, signature="t",

1566

1220

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

1567

1221

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

1568

1222

return

1569

if self.enabled:

1570

# Reschedule checker run

1571

gobject.source_remove(self.checker_initiator_tag)

1572

self.checker_initiator_tag = (gobject.timeout_add

1573

(value, self.start_checker))

1574

self.start_checker() # Start one now, too

1223

# Reschedule checker run

1224

gobject.source_remove(self.checker_initiator_tag)

1225

self.checker_initiator_tag = (gobject.timeout_add

1226

(value, self.start_checker))

1227

self.start_checker() # Start one now, too

1575

1228

1576

1229

# Checker - property

1577

1230

@dbus_service_property(_interface, signature="s",

1579

1232

def Checker_dbus_property(self, value=None):

1580

1233

if value is None: # get

1581

1234

return dbus.String(self.checker_command)

1582

self.checker_command = unicode(value)

1235

self.checker_command = value

1583

1236

1584

1237

# CheckerRunning - property

1585

1238

@dbus_service_property(_interface, signature="b",

1614

1267

raise KeyError()

1615

1268

1616

1269

def __getattribute__(self, name):

1617

if name == '_pipe':

1270

if(name == '_pipe'):

1618

1271

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

1619

1272

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

1620

1273

data = self._pipe.recv()

1627

1280

return func

1628

1281

1629

1282

def __setattr__(self, name, value):

1630

if name == '_pipe':

1283

if(name == '_pipe'):

1631

1284

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

1632

1285

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

1633

1286

1287

class ClientDBusTransitional(ClientDBus):

1288

__metaclass__ = AlternateDBusNamesMetaclass

1634

1289

1635

1290

class ClientHandler(socketserver.BaseRequestHandler, object):

1636

1291

"""A class to handle client connections.

1719

1374

client.Rejected("Disabled")

1720

1375

return

1721

1376

1722

if client.approved or not client.approval_delay:

1377

if client._approved or not client.approval_delay:

1723

1378

#We are approved or approval is disabled

1724

1379

break

1725

elif client.approved is None:

1380

elif client._approved is None:

1726

1381

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

1727

1382

client.name)

1728

1383

if self.server.use_dbus:

1741

1396

#wait until timeout or approved

1742

1397

time = datetime.datetime.now()

1743

1398

client.changedstate.acquire()

1744

client.changedstate.wait(

1745

float(timedelta_to_milliseconds(delay)

1746

/ 1000))

1399

(client.changedstate.wait

1400

(float(client._timedelta_to_milliseconds(delay)

1401

/ 1000)))

1747

1402

client.changedstate.release()

1748

1403

time2 = datetime.datetime.now()

1749

1404

if (time2 - time) >= delay:

1765

1420

try:

1766

1421

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

1767

1422

except gnutls.errors.GNUTLSError as error:

1768

logger.warning("gnutls send failed",

1769

exc_info=error)

1423

logger.warning("gnutls send failed")

1770

1424

return

1771

1425

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

1772

1426

sent, len(client.secret)

1774

1428

sent_size += sent

1775

1429

1776

1430

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

1777

# bump the timeout using extended_timeout

1778

client.bump_timeout(client.extended_timeout)

1431

# bump the timeout as if seen

1432

client.checked_ok(client.extended_timeout)

1779

1433

if self.server.use_dbus:

1780

1434

# Emit D-Bus signal

1781

1435

client.GotSecret()

1786

1440

try:

1787

1441

session.bye()

1788

1442

except gnutls.errors.GNUTLSError as error:

1789

logger.warning("GnuTLS bye failed",

1790

exc_info=error)

1443

logger.warning("GnuTLS bye failed")

1791

1444

1792

1445

@staticmethod

1793

1446

def peer_certificate(session):

1849

1502

# Convert the buffer to a Python bytestring

1850

1503

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

1851

1504

# Convert the bytestring to hexadecimal notation

1852

hex_fpr = binascii.hexlify(fpr).upper()

1505

hex_fpr = ''.join("%02X" % ord(char) for char in fpr)

1853

1506

return hex_fpr

1854

1507

1855

1508

1858

1511

def sub_process_main(self, request, address):

1859

1512

try:

1860

1513

self.finish_request(request, address)

1861

except Exception:

1514

except:

1862

1515

self.handle_error(request, address)

1863

1516

self.close_request(request)

1864

1517

1865

1518

def process_request(self, request, address):

1866

1519

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

1867

1520

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

1868

args = (request, address))

1521

args = (request,

1522

address))

1869

1523

proc.start()

1870

1524

return proc

1871

1525

1899

1553

use_ipv6: Boolean; to use IPv6 or not

1900

1554

"""

1901

1555

def __init__(self, server_address, RequestHandlerClass,

1902

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

1903

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

1904

creating a new one with socket.socket().

1905

"""

1556

interface=None, use_ipv6=True):

1906

1557

self.interface = interface

1907

1558

if use_ipv6:

1908

1559

self.address_family = socket.AF_INET6

1909

if socketfd is not None:

1910

# Save the file descriptor

1911

self.socketfd = socketfd

1912

# Save the original socket.socket() function

1913

self.socket_socket = socket.socket

1914

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

1915

#

1916

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

1917

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

1918

# patching socket.socket.)

1919

#

1920

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

1921

@functools.wraps(socket.socket)

1922

def socket_wrapper(*args, **kwargs):

1923

# Restore original function so subsequent calls are

1924

# not affected.

1925

socket.socket = self.socket_socket

1926

del self.socket_socket

1927

# This time only, return a new socket object from the

1928

# saved file descriptor.

1929

return socket.fromfd(self.socketfd, *args, **kwargs)

1930

# Replace socket.socket() function with wrapper

1931

socket.socket = socket_wrapper

1932

# The socketserver.TCPServer.__init__ will call

1933

# socket.socket(), which might be our replacement,

1934

# socket_wrapper(), if socketfd was set.

1935

1560

socketserver.TCPServer.__init__(self, server_address,

1936

1561

RequestHandlerClass)

1937

1938

1562

def server_bind(self):

1939

1563

"""This overrides the normal server_bind() function

1940

1564

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

1948

1572

try:

1949

1573

self.socket.setsockopt(socket.SOL_SOCKET,

1950

1574

SO_BINDTODEVICE,

1951

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

1575

str(self.interface

1576

+ '\0'))

1952

1577

except socket.error as error:

1953

if error.errno == errno.EPERM:

1954

logger.error("No permission to bind to"

1955

" interface %s", self.interface)

1956

elif error.errno == errno.ENOPROTOOPT:

1578

if error[0] == errno.EPERM:

1579

logger.error("No permission to"

1580

" bind to interface %s",

1581

self.interface)

1582

elif error[0] == errno.ENOPROTOOPT:

1957

1583

logger.error("SO_BINDTODEVICE not available;"

1958

1584

" cannot bind to interface %s",

1959

1585

self.interface)

1960

elif error.errno == errno.ENODEV:

1961

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

1962

" cannot bind", self.interface)

1963

1586

else:

1964

1587

raise

1965

1588

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

1995

1618

"""

1996

1619

def __init__(self, server_address, RequestHandlerClass,

1997

1620

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

1998

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

1621

gnutls_priority=None, use_dbus=True):

1999

1622

self.enabled = False

2000

1623

self.clients = clients

2001

1624

if self.clients is None:

2002

self.clients = {}

1625

self.clients = set()

2003

1626

self.use_dbus = use_dbus

2004

1627

self.gnutls_priority = gnutls_priority

2005

1628

IPv6_TCPServer.__init__(self, server_address,

2006

1629

RequestHandlerClass,

2007

1630

interface = interface,

2008

use_ipv6 = use_ipv6,

2009

socketfd = socketfd)

1631

use_ipv6 = use_ipv6)

2010

1632

def server_activate(self):

2011

1633

if self.enabled:

2012

1634

return socketserver.TCPServer.server_activate(self)

2025

1647

2026

1648

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

2027

1649

proc = None, client_object=None):

2028

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

2029

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

2030

# Wait for other process to exit

1650

condition_names = {

1651

gobject.IO_IN: "IN", # There is data to read.

1652

gobject.IO_OUT: "OUT", # Data can be written (without

1653

# blocking).

1654

gobject.IO_PRI: "PRI", # There is urgent data to read.

1655

gobject.IO_ERR: "ERR", # Error condition.

1656

gobject.IO_HUP: "HUP" # Hung up (the connection has been

1657

# broken, usually for pipes and

1658

# sockets).

1659

}

1660

conditions_string = ' | '.join(name

1661

for cond, name in

1662

condition_names.iteritems()

1663

if cond & condition)

1664

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

1665

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

2031

1666

proc.join()

2032

1667

return False

2033

1668

2039

1674

fpr = request[1]

2040

1675

address = request[2]

2041

1676

2042

for c in self.clients.itervalues():

1677

for c in self.clients:

2043

1678

if c.fingerprint == fpr:

2044

1679

client = c

2045

1680

break

2122

1757

elif suffix == "w":

2123

1758

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

2124

1759

else:

2125

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

2126

.format(suffix))

1760

raise ValueError("Unknown suffix %r" % suffix)

2127

1761

except (ValueError, IndexError) as e:

2128

1762

raise ValueError(*(e.args))

2129

1763

timevalue += delta

2130

1764

return timevalue

2131

1765

2132

1766

1767

def if_nametoindex(interface):

1768

"""Call the C function if_nametoindex(), or equivalent

1769

1770

Note: This function cannot accept a unicode string."""

1771

global if_nametoindex

1772

try:

1773

if_nametoindex = (ctypes.cdll.LoadLibrary

1774

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

1775

.if_nametoindex)

1776

except (OSError, AttributeError):

1777

logger.warning("Doing if_nametoindex the hard way")

1778

def if_nametoindex(interface):

1779

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

1780

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

1781

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

1782

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1783

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

1784

interface))

1785

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

1786

ifreq[16:20])[0]

1787

return interface_index

1788

return if_nametoindex(interface)

1789

1790

2133

1791

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

2134

1792

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

2135

1793

2143

1801

sys.exit()

2144

1802

if not noclose:

2145

1803

# Close all standard open file descriptors

2146

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

1804

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

2147

1805

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

2148

1806

raise OSError(errno.ENODEV,

2149

"{0} not a character device"

2150

.format(os.devnull))

1807

"%s not a character device"

1808

% os.path.devnull)

2151

1809

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

2152

1810

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

2153

1811

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

2162

1820

2163

1821

parser = argparse.ArgumentParser()

2164

1822

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

2165

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

1823

version = "%%(prog)s %s" % version,

2166

1824

help="show version number and exit")

2167

1825

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

2168

1826

help="Bind to interface IF")

2190

1848

" system bus interface")

2191

1849

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

2192

1850

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

2193

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

2194

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

2195

" state")

2196

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

2197

help="Specify a file descriptor to a network"

2198

" socket to use instead of creating one")

2199

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

2200

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

2201

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

2202

help="Run in foreground")

2203

2204

1851

options = parser.parse_args()

2205

1852

2206

1853

if options.check:

2219

1866

"use_dbus": "True",

2220

1867

"use_ipv6": "True",

2221

1868

"debuglevel": "",

2222

"restore": "True",

2223

"socket": "",

2224

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

2225

"foreground": "False",

2226

1869

}

2227

1870

2228

1871

# Parse config file for server-global settings

2233

1876

# Convert the SafeConfigParser object to a dict

2234

1877

server_settings = server_config.defaults()

2235

1878

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

2236

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

1879

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

2237

1880

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

2238

1881

option)

2239

1882

if server_settings["port"]:

2240

1883

server_settings["port"] = server_config.getint("DEFAULT",

2241

1884

"port")

2242

if server_settings["socket"]:

2243

server_settings["socket"] = server_config.getint("DEFAULT",

2244

"socket")

2245

# Later, stdin will, and stdout and stderr might, be dup'ed

2246

# over with an opened os.devnull. But we don't want this to

2247

# happen with a supplied network socket.

2248

if 0 <= server_settings["socket"] <= 2:

2249

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

2250

["socket"])

2251

1885

del server_config

2252

1886

2253

1887

# Override the settings from the config file with command line

2254

1888

# options, if set.

2255

1889

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

2256

1890

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

2257

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

2258

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

1891

"use_dbus", "use_ipv6", "debuglevel"):

2259

1892

value = getattr(options, option)

2260

1893

if value is not None:

2261

1894

server_settings[option] = value

2264

1897

for option in server_settings.keys():

2265

1898

if type(server_settings[option]) is str:

2266

1899

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

2267

# Debug implies foreground

2268

if server_settings["debug"]:

2269

server_settings["foreground"] = True

2270

1900

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

2271

1901

2272

1902

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

2276

1906

debuglevel = server_settings["debuglevel"]

2277

1907

use_dbus = server_settings["use_dbus"]

2278

1908

use_ipv6 = server_settings["use_ipv6"]

2279

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

2280

stored_state_file)

2281

foreground = server_settings["foreground"]

2282

2283

if debug:

2284

initlogger(debug, logging.DEBUG)

2285

else:

2286

if not debuglevel:

2287

initlogger(debug)

2288

else:

2289

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

2290

initlogger(debug, level)

2291

1909

2292

1910

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

2293

1911

syslogger.setFormatter(logging.Formatter

2294

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

2295

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

2296

.format(server_settings

2297

["servicename"])))

1912

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

1913

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

1914

% server_settings["servicename"]))

2298

1915

2299

1916

# Parse config file with clients

2300

client_config = configparser.SafeConfigParser(Client

2301

.client_defaults)

1917

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

1918

"extended_timeout": "15m",

1919

"interval": "2m",

1920

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

1921

"host": "",

1922

"approval_delay": "0s",

1923

"approval_duration": "1s",

1924

}

1925

client_config = configparser.SafeConfigParser(client_defaults)

2302

1926

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

2303

1927

"clients.conf"))

2304

1928

2313

1937

use_ipv6=use_ipv6,

2314

1938

gnutls_priority=

2315

1939

server_settings["priority"],

2316

use_dbus=use_dbus,

2317

socketfd=(server_settings["socket"]

2318

or None))

2319

if not foreground:

1940

use_dbus=use_dbus)

1941

if not debug:

2320

1942

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

2321

pidfile = None

2322

1943

try:

2323

1944

pidfile = open(pidfilename, "w")

2324

except IOError as e:

2325

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

2326

exc_info=e)

1945

except IOError:

1946

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

2327

1947

2328

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

1948

try:

1949

uid = pwd.getpwnam("_mandos").pw_uid

1950

gid = pwd.getpwnam("_mandos").pw_gid

1951

except KeyError:

2329

1952

try:

2330

uid = pwd.getpwnam(name).pw_uid

2331

gid = pwd.getpwnam(name).pw_gid

2332

break

1953

uid = pwd.getpwnam("mandos").pw_uid

1954

gid = pwd.getpwnam("mandos").pw_gid

2333

1955

except KeyError:

2334

continue

2335

else:

2336

uid = 65534

2337

gid = 65534

1956

try:

1957

uid = pwd.getpwnam("nobody").pw_uid

1958

gid = pwd.getpwnam("nobody").pw_gid

1959

except KeyError:

1960

uid = 65534

1961

gid = 65534

2338

1962

try:

2339

1963

os.setgid(gid)

2340

1964

os.setuid(uid)

2341

1965

except OSError as error:

2342

if error.errno != errno.EPERM:

1966

if error[0] != errno.EPERM:

2343

1967

raise error

2344

1968

1969

if not debug and not debuglevel:

1970

syslogger.setLevel(logging.WARNING)

1971

console.setLevel(logging.WARNING)

1972

if debuglevel:

1973

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

1974

syslogger.setLevel(level)

1975

console.setLevel(level)

1976

2345

1977

if debug:

2346

1978

# Enable all possible GnuTLS debugging

2347

1979

2357

1989

.gnutls_global_set_log_function(debug_gnutls))

2358

1990

2359

1991

# Redirect stdin so all checkers get /dev/null

2360

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

1992

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

2361

1993

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

2362

1994

if null > 2:

2363

1995

os.close(null)

1996

else:

1997

# No console logging

1998

logger.removeHandler(console)

2364

1999

2365

2000

# Need to fork before connecting to D-Bus

2366

if not foreground:

2001

if not debug:

2367

2002

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

2368

2003

daemon()

2369

2004

2370

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

2371

# need to inform gobject that threads will be used.

2372

gobject.threads_init()

2373

2374

2005

global main_loop

2375

2006

# From the Avahi example code

2376

DBusGMainLoop(set_as_default=True)

2007

DBusGMainLoop(set_as_default=True )

2377

2008

main_loop = gobject.MainLoop()

2378

2009

bus = dbus.SystemBus()

2379

2010

# End of Avahi example code

2385

2016

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

2386

2017

do_not_queue=True))

2387

2018

except dbus.exceptions.NameExistsException as e:

2388

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

2019

logger.error(unicode(e) + ", disabling D-Bus")

2389

2020

use_dbus = False

2390

2021

server_settings["use_dbus"] = False

2391

2022

tcp_server.use_dbus = False

2392

2023

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2393

service = AvahiServiceToSyslog(name =

2394

server_settings["servicename"],

2395

servicetype = "_mandos._tcp",

2396

protocol = protocol, bus = bus)

2024

service = AvahiService(name = server_settings["servicename"],

2025

servicetype = "_mandos._tcp",

2026

protocol = protocol, bus = bus)

2397

2027

if server_settings["interface"]:

2398

2028

service.interface = (if_nametoindex

2399

2029

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

2403

2033

2404

2034

client_class = Client

2405

2035

if use_dbus:

2406

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

2407

2408

client_settings = Client.config_parser(client_config)

2409

old_client_settings = {}

2410

clients_data = {}

2411

2412

# Get client data and settings from last running state.

2413

if server_settings["restore"]:

2414

try:

2415

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

2416

clients_data, old_client_settings = (pickle.load

2417

(stored_state))

2418

os.remove(stored_state_path)

2419

except IOError as e:

2420

if e.errno == errno.ENOENT:

2421

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

2422

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

2423

else:

2424

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

2425

exc_info=e)

2426

raise

2427

except EOFError as e:

2428

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

2429

"EOFError:", exc_info=e)

2430

2431

with PGPEngine() as pgp:

2432

for client_name, client in clients_data.iteritems():

2433

# Decide which value to use after restoring saved state.

2434

# We have three different values: Old config file,

2435

# new config file, and saved state.

2436

# New config value takes precedence if it differs from old

2437

# config value, otherwise use saved state.

2438

for name, value in client_settings[client_name].items():

2439

try:

2440

# For each value in new config, check if it

2441

# differs from the old config value (Except for

2442

# the "secret" attribute)

2443

if (name != "secret" and

2444

value != old_client_settings[client_name]

2445

[name]):

2446

client[name] = value

2447

except KeyError:

2448

pass

2449

2450

# Clients who has passed its expire date can still be

2451

# enabled if its last checker was successful. Clients

2452

# whose checker succeeded before we stored its state is

2453

# assumed to have successfully run all checkers during

2454

# downtime.

2455

if client["enabled"]:

2456

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

2457

if not client["last_checked_ok"]:

2458

logger.warning(

2459

"disabling client {0} - Client never "

2460

"performed a successful checker"

2461

.format(client_name))

2462

client["enabled"] = False

2463

elif client["last_checker_status"] != 0:

2464

logger.warning(

2465

"disabling client {0} - Client "

2466

"last checker failed with error code {1}"

2467

.format(client_name,

2468

client["last_checker_status"]))

2469

client["enabled"] = False

2470

else:

2471

client["expires"] = (datetime.datetime

2472

.utcnow()

2473

+ client["timeout"])

2474

logger.debug("Last checker succeeded,"

2475

" keeping {0} enabled"

2476

.format(client_name))

2036

client_class = functools.partial(ClientDBusTransitional,

2037

bus = bus)

2038

def client_config_items(config, section):

2039

special_settings = {

2040

"approved_by_default":

2041

lambda: config.getboolean(section,

2042

"approved_by_default"),

2043

}

2044

for name, value in config.items(section):

2477

2045

try:

2478

client["secret"] = (

2479

pgp.decrypt(client["encrypted_secret"],

2480

client_settings[client_name]

2481

["secret"]))

2482

except PGPError:

2483

# If decryption fails, we use secret from new settings

2484

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

2485

.format(client_name))

2486

client["secret"] = (

2487

client_settings[client_name]["secret"])

2488

2489

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

2490

for client_name in (set(old_client_settings)

2491

- set(client_settings)):

2492

del clients_data[client_name]

2493

for client_name in (set(client_settings)

2494

- set(old_client_settings)):

2495

clients_data[client_name] = client_settings[client_name]

2496

2497

# Create all client objects

2498

for client_name, client in clients_data.iteritems():

2499

tcp_server.clients[client_name] = client_class(

2500

name = client_name, settings = client)

2501

2046

yield (name, special_settings[name]())

2047

except KeyError:

2048

yield (name, value)

2049

2050

tcp_server.clients.update(set(

2051

client_class(name = section,

2052

config= dict(client_config_items(

2053

client_config, section)))

2054

for section in client_config.sections()))

2502

2055

if not tcp_server.clients:

2503

2056

logger.warning("No clients defined")

2504

2505

if not foreground:

2506

if pidfile is not None:

2507

try:

2508

with pidfile:

2509

pid = os.getpid()

2510

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

2511

except IOError:

2512

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

2513

pidfilename, pid)

2514

del pidfile

2057

2058

if not debug:

2059

try:

2060

with pidfile:

2061

pid = os.getpid()

2062

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

2063

del pidfile

2064

except IOError:

2065

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

2066

pidfilename, pid)

2067

except NameError:

2068

# "pidfile" was never created

2069

pass

2515

2070

del pidfilename

2071

2072

signal.signal(signal.SIGINT, signal.SIG_IGN)

2516

2073

2517

2074

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

2518

2075

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

2519

2076

2520

2077

if use_dbus:

2521

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

2522

"se.bsnet.fukt.Mandos"})

2523

class MandosDBusService(DBusObjectWithProperties):

2078

class MandosDBusService(dbus.service.Object):

2524

2079

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

2525

2080

def __init__(self):

2526

2081

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

2527

2082

_interface = "se.recompile.Mandos"

2528

2083

2529

@dbus_interface_annotations(_interface)

2530

def _foo(self):

2531

return { "org.freedesktop.DBus.Property"

2532

".EmitsChangedSignal":

2533

"false"}

2534

2535

2084

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

2536

2085

def ClientAdded(self, objpath):

2537

2086

"D-Bus signal"

2551

2100

def GetAllClients(self):

2552

2101

"D-Bus method"

2553

2102

return dbus.Array(c.dbus_object_path

2554

for c in

2555

tcp_server.clients.itervalues())

2103

for c in tcp_server.clients)

2556

2104

2557

2105

@dbus.service.method(_interface,

2558

2106

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

2560

2108

"D-Bus method"

2561

2109

return dbus.Dictionary(

2562

2110

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

2563

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

2111

for c in tcp_server.clients),

2564

2112

signature="oa{sv}")

2565

2113

2566

2114

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

2567

2115

def RemoveClient(self, object_path):

2568

2116

"D-Bus method"

2569

for c in tcp_server.clients.itervalues():

2117

for c in tcp_server.clients:

2570

2118

if c.dbus_object_path == object_path:

2571

del tcp_server.clients[c.name]

2119

tcp_server.clients.remove(c)

2572

2120

c.remove_from_connection()

2573

2121

# Don't signal anything except ClientRemoved

2574

2122

c.disable(quiet=True)

2579

2127

2580

2128

del _interface

2581

2129

2582

mandos_dbus_service = MandosDBusService()

2130

class MandosDBusServiceTransitional(MandosDBusService):

2131

__metaclass__ = AlternateDBusNamesMetaclass

2132

mandos_dbus_service = MandosDBusServiceTransitional()

2583

2133

2584

2134

def cleanup():

2585

2135

"Cleanup function; run on exit"

2586

2136

service.cleanup()

2587

2137

2588

2138

multiprocessing.active_children()

2589

if not (tcp_server.clients or client_settings):

2590

return

2591

2592

# Store client before exiting. Secrets are encrypted with key

2593

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

2594

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

2595

clients = {}

2596

with PGPEngine() as pgp:

2597

for client in tcp_server.clients.itervalues():

2598

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

2599

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

2600

key)

2601

client_dict = {}

2602

2603

# A list of attributes that can not be pickled

2604

# + secret.

2605

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

2606

"checker"))

2607

for name, typ in (inspect.getmembers

2608

(dbus.service.Object)):

2609

exclude.add(name)

2610

2611

client_dict["encrypted_secret"] = (client

2612

.encrypted_secret)

2613

for attr in client.client_structure:

2614

if attr not in exclude:

2615

client_dict[attr] = getattr(client, attr)

2616

2617

clients[client.name] = client_dict

2618

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

2619

2620

try:

2621

with (tempfile.NamedTemporaryFile

2622

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

2623

dir=os.path.dirname(stored_state_path),

2624

delete=False)) as stored_state:

2625

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

2626

tempname=stored_state.name

2627

os.rename(tempname, stored_state_path)

2628

except (IOError, OSError) as e:

2629

if not debug:

2630

try:

2631

os.remove(tempname)

2632

except NameError:

2633

pass

2634

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

2635

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

2636

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

2637

else:

2638

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

2639

exc_info=e)

2640

raise e

2641

2642

# Delete all clients, and settings from config

2643

2139

while tcp_server.clients:

2644

name, client = tcp_server.clients.popitem()

2140

client = tcp_server.clients.pop()

2645

2141

if use_dbus:

2646

2142

client.remove_from_connection()

2143

client.disable_hook = None

2647

2144

# Don't signal anything except ClientRemoved

2648

2145

client.disable(quiet=True)

2649

2146

if use_dbus:

2651

2148

mandos_dbus_service.ClientRemoved(client

2652

2149

.dbus_object_path,

2653

2150

client.name)

2654

client_settings.clear()

2655

2151

2656

2152

atexit.register(cleanup)

2657

2153

2658

for client in tcp_server.clients.itervalues():

2154

for client in tcp_server.clients:

2659

2155

if use_dbus:

2660

2156

# Emit D-Bus signal

2661

2157

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2662

# Need to initiate checking of clients

2663

if client.enabled:

2664

client.init_checker()

2158

client.enable()

2665

2159

2666

2160

tcp_server.enable()

2667

2161

tcp_server.server_activate()

2670

2164

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

2671

2165

if use_ipv6:

2672

2166

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

2673

" flowinfo %d, scope_id %d",

2674

*tcp_server.socket.getsockname())

2167

" flowinfo %d, scope_id %d"

2168

% tcp_server.socket.getsockname())

2675

2169

else: # IPv4

2676

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

2677

*tcp_server.socket.getsockname())

2170

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

2171

% tcp_server.socket.getsockname())

2678

2172

2679

2173

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

2680

2174

2683

2177

try:

2684

2178

service.activate()

2685

2179

except dbus.exceptions.DBusException as error:

2686

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

2180

logger.critical("DBusException: %s", error)

2687

2181

cleanup()

2688

2182

sys.exit(1)

2689

2183

# End of Avahi example code

2696

2190

logger.debug("Starting main loop")

2697

2191

main_loop.run()

2698

2192

except AvahiError as error:

2699

logger.critical("Avahi Error", exc_info=error)

2193

logger.critical("AvahiError: %s", error)

2700

2194

cleanup()

2701

2195

sys.exit(1)

2702

2196

except KeyboardInterrupt:

2707

2201

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

2708

2202

cleanup()

2709

2203

2204

2710

2205

if __name__ == '__main__':

2711

2206

main()