/mandos/trunk : revision 518.2.3

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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 types

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import binascii

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import tempfile

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import itertools

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import collections

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import 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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version = "1.4.1"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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return interface_index

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

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def initlogger(level=logging.WARNING):

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"""init logger and add loglevel"""

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syslogger.setFormatter(logging.Formatter

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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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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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class CryptoError(Exception):

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pass

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class PGPEngine(object):

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class Crypto(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.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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

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self._cleanup()

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return False

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

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir=self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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

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with open(os.devnull) 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 CryptoError(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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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir = self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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decrypted_plaintext, err = proc.communicate(input

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= data)

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if proc.returncode != 0:

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raise PGPError(err)

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

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with open(os.devnull) 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 CryptoError(e)

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self.gnupg.passphrase = None

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return decrypted_plaintext

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class AvahiError(Exception):

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

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self.value = value

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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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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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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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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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)

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

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

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% 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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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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checker, or None.

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

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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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server_settings: The server_settings dict from main()

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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": "PT5M",

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"extended_timeout": "PT15M",

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"interval": "PT2M",

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

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"host": "",

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"approval_delay": "PT0S",

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"approval_duration": "PT1S",

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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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"""

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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")

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elif "secfile" in section:

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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()

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else:

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

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.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"])

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

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client["approval_delay"] = string_to_delta(

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section["approval_delay"])

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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

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client["last_checked_ok"] = None

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client["last_checker_status"] = -2

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return settings

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

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return _timedelta_to_milliseconds(self.approval_delay)

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

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

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

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attribute."""

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self.name = name

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if server_settings is None:

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server_settings = {}

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self.server_settings = server_settings

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# adding all client settings

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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"):

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self.last_enabled = datetime.datetime.utcnow()

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if not hasattr(self, "expires"):

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

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+ self.timeout)

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else:

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self.last_enabled = None

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self.expires = None

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if config is None:

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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(" ", ""))

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

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

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datetime.datetime.utcnow())

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# attributes specific for this server instance

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if "secret" in config:

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

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elif "secfile" in config:

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

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(config["secfile"])),

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"rb") as secfile:

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self.secret = secfile.read()

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else:

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

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% self.name)

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

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self.created = datetime.datetime.utcnow()

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self.enabled = config.get("enabled", True)

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self.last_approval_request = None

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if self.enabled:

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self.last_enabled = datetime.datetime.utcnow()

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else:

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self.last_enabled = None

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self.last_checked_ok = None

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self.last_checker_status = None

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

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self.extended_timeout = string_to_delta(config

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["extended_timeout"])

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

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self.checker = None

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self.checker_initiator_tag = None

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self.disable_initiator_tag = None

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if self.enabled:

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

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else:

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self.expires = None

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self.checker_callback_tag = None

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self.checker_command = config["checker"]

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self.current_checker_command = None

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self.approved = None

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self._approved = None

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

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True)

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self.approvals_pending = 0

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self.approval_delay = string_to_delta(

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config["approval_delay"])

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self.approval_duration = string_to_delta(

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config["approval_duration"])

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self.changedstate = (multiprocessing_manager

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.Condition(multiprocessing_manager

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.Lock()))

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

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# Already enabled

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return

531

self.send_changedstate()

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

585

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self.enabled = True

586

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self.last_enabled = datetime.datetime.utcnow()

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self.init_checker()

588

self.send_changedstate()

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def disable(self, quiet=True):

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"""Disable this client."""

592

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

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return False

594

541

if not quiet:

542

self.send_changedstate()

543

if not quiet:

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

596

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

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

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gobject.source_remove(self.disable_initiator_tag)

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self.disable_initiator_tag = None

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self.expires = None

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

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

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gobject.source_remove(self.checker_initiator_tag)

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self.checker_initiator_tag = None

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self.stop_checker()

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self.enabled = False

605

if not quiet:

606

self.send_changedstate()

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

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return False

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def init_checker(self):

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

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# and every interval from then on.

616

if self.checker_initiator_tag is not None:

617

gobject.source_remove(self.checker_initiator_tag)

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self.checker_initiator_tag = (gobject.timeout_add

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(self.interval_milliseconds(),

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self.start_checker))

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

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if self.disable_initiator_tag is not None:

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gobject.source_remove(self.disable_initiator_tag)

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self.disable_initiator_tag = (gobject.timeout_add

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(self.timeout_milliseconds(),

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self.disable))

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self.checker_callback_tag = None

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self.checker = None

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if os.WIFEXITED(condition):

635

self.last_checker_status = os.WEXITSTATUS(condition)

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self.last_checker_status = os.WEXITSTATUS(condition)

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if self.last_checker_status == 0:

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

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vars(self))

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

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vars(self))

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def checked_ok(self):

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

650

self.last_checked_ok = datetime.datetime.utcnow()

651

self.last_checker_status = 0

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self.bump_timeout()

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def bump_timeout(self, timeout=None):

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

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def checked_ok(self, timeout=None):

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"""Bump up the timeout for this client.

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

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alive and well.

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"""

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if timeout is None:

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timeout = self.timeout

599

self.last_checked_ok = datetime.datetime.utcnow()

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if self.disable_initiator_tag is not None:

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gobject.source_remove(self.disable_initiator_tag)

660

self.disable_initiator_tag = None

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

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self.disable_initiator_tag = (gobject.timeout_add

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(timedelta_to_milliseconds

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(_timedelta_to_milliseconds

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(timeout), self.disable))

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

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If a checker already exists, leave it running and do

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nothing."""

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

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

677

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

678

# would inevitably timeout, since no checker would get a

679

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

617

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

618

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

619

# client would inevitably timeout, since no checker would get

620

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

680

621

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

681

622

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

682

623

# should be.

696

637

self.current_checker_command)

697

638

# Start a new checker if needed

698

639

if self.checker is None:

699

# Escape attributes for the shell

700

escaped_attrs = dict(

701

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

702

for attr in

703

self.runtime_expansions)

704

640

try:

705

command = self.checker_command % escaped_attrs

706

except TypeError as error:

707

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

708

self.checker_command, exc_info=error)

709

return True # Try again later

641

# In case checker_command has exactly one % operator

642

command = self.checker_command % self.host

643

except TypeError:

644

# Escape attributes for the shell

645

escaped_attrs = dict(

646

(attr,

647

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

648

errors=

649

'replace')))

650

for attr in

651

self.runtime_expansions)

652

653

try:

654

command = self.checker_command % escaped_attrs

655

except TypeError as error:

656

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

657

' %s', self.checker_command, error)

658

return True # Try again later

710

659

self.current_checker_command = command

711

660

try:

712

661

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

715

664

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

716

665

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

717

666

# always replaced by /dev/null.)

718

# The exception is when not debugging but nevertheless

719

# running in the foreground; use the previously

720

# created wnull.

721

popen_args = {}

722

if (not self.server_settings["debug"]

723

and self.server_settings["foreground"]):

724

popen_args.update({"stdout": wnull,

725

"stderr": wnull })

726

667

self.checker = subprocess.Popen(command,

727

668

close_fds=True,

728

shell=True, cwd="/",

729

**popen_args)

730

except OSError as error:

731

logger.error("Failed to start subprocess",

732

exc_info=error)

733

return True

734

self.checker_callback_tag = (gobject.child_watch_add

735

(self.checker.pid,

736

self.checker_callback,

737

data=command))

738

# The checker may have completed before the gobject

739

# watch was added. Check for this.

740

try:

669

shell=True, cwd="/")

670

self.checker_callback_tag = (gobject.child_watch_add

671

(self.checker.pid,

672

self.checker_callback,

673

data=command))

674

# The checker may have completed before the gobject

675

# watch was added. Check for this.

741

676

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

677

if pid:

678

gobject.source_remove(self.checker_callback_tag)

679

self.checker_callback(pid, status, command)

742

680

except OSError as error:

743

if error.errno == errno.ECHILD:

744

# This should never happen

745

logger.error("Child process vanished",

746

exc_info=error)

747

return True

748

raise

749

if pid:

750

gobject.source_remove(self.checker_callback_tag)

751

self.checker_callback(pid, status, command)

681

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

682

error)

752

683

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

753

684

return True

754

685

761

692

return

762

693

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

763

694

try:

764

self.checker.terminate()

695

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

765

696

#time.sleep(0.5)

766

697

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

767

# self.checker.kill()

698

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

768

699

except OSError as error:

769

700

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

770

701

raise

787

718

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

788

719

if byte_arrays and signature != "ay":

789

720

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

790

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

721

" signature %r" % signature)

791

722

def decorator(func):

792

723

func._dbus_is_property = True

793

724

func._dbus_interface = dbus_interface

801

732

return decorator

802

733

803

734

804

def dbus_interface_annotations(dbus_interface):

805

"""Decorator for marking functions returning interface annotations

806

807

Usage:

808

809

@dbus_interface_annotations("org.example.Interface")

810

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

811

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

812

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

813

"false"}

814

"""

815

def decorator(func):

816

func._dbus_is_interface = True

817

func._dbus_interface = dbus_interface

818

func._dbus_name = dbus_interface

819

return func

820

return decorator

821

822

823

def dbus_annotations(annotations):

824

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

825

Usage:

826

827

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

828

access="r")

829

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

830

"org.freedesktop.DBus.Property."

831

"EmitsChangedSignal": "false"})

832

def Property_dbus_property(self):

833

return dbus.Boolean(False)

834

"""

835

def decorator(func):

836

func._dbus_annotations = annotations

837

return func

838

return decorator

839

840

841

735

class DBusPropertyException(dbus.exceptions.DBusException):

842

736

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

843

737

"""

866

760

"""

867

761

868

762

@staticmethod

869

def _is_dbus_thing(thing):

870

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

871

872

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

873

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

874

"""

875

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

876

False)

763

def _is_dbus_property(obj):

764

return getattr(obj, "_dbus_is_property", False)

877

765

878

def _get_all_dbus_things(self, thing):

766

def _get_all_dbus_properties(self):

879

767

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

880

768

"""

881

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

882

name),

883

athing.__get__(self))

769

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

884

770

for cls in self.__class__.__mro__

885

for name, athing in

886

inspect.getmembers(cls,

887

self._is_dbus_thing(thing)))

771

for name, prop in

772

inspect.getmembers(cls, self._is_dbus_property))

888

773

889

774

def _get_dbus_property(self, interface_name, property_name):

890

775

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

892

777

"""

893

778

for cls in self.__class__.__mro__:

894

779

for name, value in (inspect.getmembers

895

(cls,

896

self._is_dbus_thing("property"))):

780

(cls, self._is_dbus_property)):

897

781

if (value._dbus_name == property_name

898

782

and value._dbus_interface == interface_name):

899

783

return value.__get__(self)

928

812

# signatures other than "ay".

929

813

if prop._dbus_signature != "ay":

930

814

raise ValueError

931

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

932

for byte in value))

815

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

816

for byte in value))

933

817

prop(value)

934

818

935

819

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

941

825

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

942

826

"""

943

827

properties = {}

944

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

828

for name, prop in self._get_all_dbus_properties():

945

829

if (interface_name

946

830

and interface_name != prop._dbus_interface):

947

831

# Interface non-empty but did not match

962

846

path_keyword='object_path',

963

847

connection_keyword='connection')

964

848

def Introspect(self, object_path, connection):

965

"""Overloading of standard D-Bus method.

966

967

Inserts property tags and interface annotation tags.

849

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

968

850

"""

969

851

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

970

852

connection)

977

859

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

978

860

return e

979

861

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

980

# Add property tags

981

862

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

982

863

for name, prop

983

in self._get_all_dbus_things("property")

864

in self._get_all_dbus_properties()

984

865

if prop._dbus_interface

985

866

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

986

867

if_tag.appendChild(tag)

987

# Add annotation tags

988

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

989

for tag in if_tag.getElementsByTagName(typ):

990

annots = dict()

991

for name, prop in (self.

992

_get_all_dbus_things(typ)):

993

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

994

and prop._dbus_interface

995

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

996

annots.update(getattr

997

(prop,

998

"_dbus_annotations",

999

{}))

1000

for name, value in annots.iteritems():

1001

ann_tag = document.createElement(

1002

"annotation")

1003

ann_tag.setAttribute("name", name)

1004

ann_tag.setAttribute("value", value)

1005

tag.appendChild(ann_tag)

1006

# Add interface annotation tags

1007

for annotation, value in dict(

1008

itertools.chain.from_iterable(

1009

annotations().iteritems()

1010

for name, annotations in

1011

self._get_all_dbus_things("interface")

1012

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

1013

)).iteritems():

1014

ann_tag = document.createElement("annotation")

1015

ann_tag.setAttribute("name", annotation)

1016

ann_tag.setAttribute("value", value)

1017

if_tag.appendChild(ann_tag)

1018

868

# Add the names to the return values for the

1019

869

# "org.freedesktop.DBus.Properties" methods

1020

870

if (if_tag.getAttribute("name")

1035

885

except (AttributeError, xml.dom.DOMException,

1036

886

xml.parsers.expat.ExpatError) as error:

1037

887

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

1038

exc_info=error)

888

error)

1039

889

return xmlstring

1040

890

1041

891

1042

def datetime_to_dbus(dt, variant_level=0):

892

def datetime_to_dbus (dt, variant_level=0):

1043

893

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

1044

894

if dt is None:

1045

895

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

1047

897

variant_level=variant_level)

1048

898

1049

899

1050

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1051

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

1052

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

1053

interface names according to the "alt_interface_names" mapping.

1054

Usage:

1055

1056

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

1057

"net.example.AlternateInterface"})

1058

class SampleDBusObject(dbus.service.Object):

1059

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

1060

def SampleDBusMethod():

1061

pass

1062

1063

The above "SampleDBusMethod" on "SampleDBusObject" will be

1064

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

1065

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

1066

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

1067

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

1068

1069

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

1070

(from DBusObjectWithProperties) and interfaces (from the

1071

dbus_interface_annotations decorator).

900

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

901

.__metaclass__):

902

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

903

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

1072

904

"""

1073

def wrapper(cls):

1074

for orig_interface_name, alt_interface_name in (

1075

alt_interface_names.iteritems()):

1076

attr = {}

1077

interface_names = set()

1078

# Go though all attributes of the class

1079

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

905

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

906

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

907

# methods, signals, or properties in them

908

for base in (b for b in bases

909

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

910

# Go though all attributes of the base class

911

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

1080

912

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

1081

913

# with the wrong interface name

1082

914

if (not hasattr(attribute, "_dbus_interface")

1083

915

or not attribute._dbus_interface

1084

.startswith(orig_interface_name)):

916

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

1085

917

continue

1086

918

# Create an alternate D-Bus interface name based on

1087

919

# the current name

1088

920

alt_interface = (attribute._dbus_interface

1089

.replace(orig_interface_name,

1090

alt_interface_name))

1091

interface_names.add(alt_interface)

921

.replace("se.recompile.Mandos",

922

"se.bsnet.fukt.Mandos"))

1092

923

# Is this a D-Bus signal?

1093

924

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

1094

# Extract the original non-method undecorated

1095

# function by black magic

925

# Extract the original non-method function by

926

# black magic

1096

927

nonmethod_func = (dict(

1097

928

zip(attribute.func_code.co_freevars,

1098

929

attribute.__closure__))["func"]

1109

940

nonmethod_func.func_name,

1110

941

nonmethod_func.func_defaults,

1111

942

nonmethod_func.func_closure)))

1112

# Copy annotations, if any

1113

try:

1114

new_function._dbus_annotations = (

1115

dict(attribute._dbus_annotations))

1116

except AttributeError:

1117

pass

1118

943

# Define a creator of a function to call both the

1119

# original and alternate functions, so both the

1120

# original and alternate signals gets sent when

1121

# the function is called

944

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

945

# signals gets sent when the function is called

1122

946

def fixscope(func1, func2):

1123

947

"""This function is a scope container to pass

1124

948

func1 and func2 to the "call_both" function

1131

955

return call_both

1132

956

# Create the "call_both" function and add it to

1133

957

# the class

1134

attr[attrname] = fixscope(attribute, new_function)

958

attr[attrname] = fixscope(attribute,

959

new_function)

1135

960

# Is this a D-Bus method?

1136

961

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

1137

962

# Create a new, but exactly alike, function

1148

973

attribute.func_name,

1149

974

attribute.func_defaults,

1150

975

attribute.func_closure)))

1151

# Copy annotations, if any

1152

try:

1153

attr[attrname]._dbus_annotations = (

1154

dict(attribute._dbus_annotations))

1155

except AttributeError:

1156

pass

1157

976

# Is this a D-Bus property?

1158

977

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

1159

978

# Create a new, but exactly alike, function

1173

992

attribute.func_name,

1174

993

attribute.func_defaults,

1175

994

attribute.func_closure)))

1176

# Copy annotations, if any

1177

try:

1178

attr[attrname]._dbus_annotations = (

1179

dict(attribute._dbus_annotations))

1180

except AttributeError:

1181

pass

1182

# Is this a D-Bus interface?

1183

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

1184

# Create a new, but exactly alike, function

1185

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

1186

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

1187

# to the class.

1188

attr[attrname] = (dbus_interface_annotations

1189

(alt_interface)

1190

(types.FunctionType

1191

(attribute.func_code,

1192

attribute.func_globals,

1193

attribute.func_name,

1194

attribute.func_defaults,

1195

attribute.func_closure)))

1196

if deprecate:

1197

# Deprecate all alternate interfaces

1198

iname="_AlternateDBusNames_interface_annotation{0}"

1199

for interface_name in interface_names:

1200

@dbus_interface_annotations(interface_name)

1201

def func(self):

1202

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

1203

"true" }

1204

# Find an unused name

1205

for aname in (iname.format(i)

1206

for i in itertools.count()):

1207

if aname not in attr:

1208

attr[aname] = func

1209

break

1210

if interface_names:

1211

# Replace the class with a new subclass of it with

1212

# methods, signals, etc. as created above.

1213

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

1214

(cls,), attr)

1215

return cls

1216

return wrapper

1217

1218

1219

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

1220

"se.bsnet.fukt.Mandos"})

995

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

996

997

1221

998

class ClientDBus(Client, DBusObjectWithProperties):

1222

999

"""A Client class using D-Bus

1223

1000

1234

1011

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

1235

1012

self.bus = bus

1236

1013

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

1014

1015

self._approvals_pending = 0

1237

1016

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

1238

1017

# the D-Bus

1239

1018

client_object_name = unicode(self.name).translate(

1243

1022

("/clients/" + client_object_name))

1244

1023

DBusObjectWithProperties.__init__(self, self.bus,

1245

1024

self.dbus_object_path)

1246

1025

1247

1026

def notifychangeproperty(transform_func,

1248

1027

dbus_name, type_func=lambda x: x,

1249

1028

variant_level=1):

1272

1051

1273

1052

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

1274

1053

1054

1275

1055

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1276

1056

approvals_pending = notifychangeproperty(dbus.Boolean,

1277

1057

"ApprovalPending",

1284

1064

checker is not None)

1285

1065

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1286

1066

"LastCheckedOK")

1287

last_checker_status = notifychangeproperty(dbus.Int16,

1288

"LastCheckerStatus")

1289

1067

last_approval_request = notifychangeproperty(

1290

1068

datetime_to_dbus, "LastApprovalRequest")

1291

1069

approved_by_default = notifychangeproperty(dbus.Boolean,

1292

1070

"ApprovedByDefault")

1293

approval_delay = notifychangeproperty(dbus.UInt64,

1071

approval_delay = notifychangeproperty(dbus.UInt16,

1294

1072

"ApprovalDelay",

1295

1073

type_func =

1296

timedelta_to_milliseconds)

1074

_timedelta_to_milliseconds)

1297

1075

approval_duration = notifychangeproperty(

1298

dbus.UInt64, "ApprovalDuration",

1299

type_func = timedelta_to_milliseconds)

1076

dbus.UInt16, "ApprovalDuration",

1077

type_func = _timedelta_to_milliseconds)

1300

1078

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

1301

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

1079

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

1302

1080

type_func =

1303

timedelta_to_milliseconds)

1081

_timedelta_to_milliseconds)

1304

1082

extended_timeout = notifychangeproperty(

1305

dbus.UInt64, "ExtendedTimeout",

1306

type_func = timedelta_to_milliseconds)

1307

interval = notifychangeproperty(dbus.UInt64,

1083

dbus.UInt16, "ExtendedTimeout",

1084

type_func = _timedelta_to_milliseconds)

1085

interval = notifychangeproperty(dbus.UInt16,

1308

1086

"Interval",

1309

1087

type_func =

1310

timedelta_to_milliseconds)

1088

_timedelta_to_milliseconds)

1311

1089

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

1312

1090

1313

1091

del notifychangeproperty

1355

1133

return r

1356

1134

1357

1135

def _reset_approved(self):

1358

self.approved = None

1136

self._approved = None

1359

1137

return False

1360

1138

1361

1139

def approve(self, value=True):

1362

self.approved = value

1363

gobject.timeout_add(timedelta_to_milliseconds

1140

self.send_changedstate()

1141

self._approved = value

1142

gobject.timeout_add(_timedelta_to_milliseconds

1364

1143

(self.approval_duration),

1365

1144

self._reset_approved)

1366

self.send_changedstate()

1145

1367

1146

1368

1147

## D-Bus methods, signals & properties

1369

1148

_interface = "se.recompile.Mandos.Client"

1370

1149

1371

## Interfaces

1372

1373

@dbus_interface_annotations(_interface)

1374

def _foo(self):

1375

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

1376

"false"}

1377

1378

1150

## Signals

1379

1151

1380

1152

# CheckerCompleted - signal

1416

1188

"D-Bus signal"

1417

1189

return self.need_approval()

1418

1190

1191

# NeRwequest - signal

1192

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

1193

def NewRequest(self, ip):

1194

"""D-Bus signal

1195

Is sent after a client request a password.

1196

"""

1197

pass

1198

1419

1199

## Methods

1420

1200

1421

1201

# Approve - method

1479

1259

access="readwrite")

1480

1260

def ApprovalDuration_dbus_property(self, value=None):

1481

1261

if value is None: # get

1482

return dbus.UInt64(timedelta_to_milliseconds(

1262

return dbus.UInt64(_timedelta_to_milliseconds(

1483

1263

self.approval_duration))

1484

1264

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

1485

1265

1499

1279

def Host_dbus_property(self, value=None):

1500

1280

if value is None: # get

1501

1281

return dbus.String(self.host)

1502

self.host = unicode(value)

1282

self.host = value

1503

1283

1504

1284

# Created - property

1505

1285

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

1531

1311

return

1532

1312

return datetime_to_dbus(self.last_checked_ok)

1533

1313

1534

# LastCheckerStatus - property

1535

@dbus_service_property(_interface, signature="n",

1536

access="read")

1537

def LastCheckerStatus_dbus_property(self):

1538

return dbus.Int16(self.last_checker_status)

1539

1540

1314

# Expires - property

1541

1315

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

1542

1316

def Expires_dbus_property(self):

1553

1327

def Timeout_dbus_property(self, value=None):

1554

1328

if value is None: # get

1555

1329

return dbus.UInt64(self.timeout_milliseconds())

1556

old_timeout = self.timeout

1557

1330

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

1558

# Reschedule disabling

1559

if self.enabled:

1560

now = datetime.datetime.utcnow()

1561

self.expires += self.timeout - old_timeout

1562

if self.expires <= now:

1563

# The timeout has passed

1564

self.disable()

1565

else:

1566

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

1567

is None):

1568

return

1569

gobject.source_remove(self.disable_initiator_tag)

1570

self.disable_initiator_tag = (

1571

gobject.timeout_add(

1572

timedelta_to_milliseconds(self.expires - now),

1573

self.disable))

1331

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

1332

return

1333

# Reschedule timeout

1334

gobject.source_remove(self.disable_initiator_tag)

1335

self.disable_initiator_tag = None

1336

self.expires = None

1337

time_to_die = _timedelta_to_milliseconds((self

1338

.last_checked_ok

1339

+ self.timeout)

1340

- datetime.datetime

1341

.utcnow())

1342

if time_to_die <= 0:

1343

# The timeout has passed

1344

self.disable()

1345

else:

1346

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

1347

+ datetime.timedelta(milliseconds =

1348

time_to_die))

1349

self.disable_initiator_tag = (gobject.timeout_add

1350

(time_to_die, self.disable))

1574

1351

1575

1352

# ExtendedTimeout - property

1576

1353

@dbus_service_property(_interface, signature="t",

1602

1379

def Checker_dbus_property(self, value=None):

1603

1380

if value is None: # get

1604

1381

return dbus.String(self.checker_command)

1605

self.checker_command = unicode(value)

1382

self.checker_command = value

1606

1383

1607

1384

# CheckerRunning - property

1608

1385

@dbus_service_property(_interface, signature="b",

1637

1414

raise KeyError()

1638

1415

1639

1416

def __getattribute__(self, name):

1640

if name == '_pipe':

1417

if(name == '_pipe'):

1641

1418

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

1642

1419

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

1643

1420

data = self._pipe.recv()

1650

1427

return func

1651

1428

1652

1429

def __setattr__(self, name, value):

1653

if name == '_pipe':

1430

if(name == '_pipe'):

1654

1431

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

1655

1432

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

1656

1433

1657

1434

1435

class ClientDBusTransitional(ClientDBus):

1436

__metaclass__ = AlternateDBusNamesMetaclass

1437

1438

1658

1439

class ClientHandler(socketserver.BaseRequestHandler, object):

1659

1440

"""A class to handle client connections.

1660

1441

1721

1502

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

1722

1503

return

1723

1504

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

1505

if self.server.use_dbus:

1506

# Emit D-Bus signal

1507

client.NewRequest(str(self.client_address))

1724

1508

1725

1509

try:

1726

1510

client = ProxyClient(child_pipe, fpr,

1742

1526

client.Rejected("Disabled")

1743

1527

return

1744

1528

1745

if client.approved or not client.approval_delay:

1529

if client._approved or not client.approval_delay:

1746

1530

#We are approved or approval is disabled

1747

1531

break

1748

elif client.approved is None:

1532

elif client._approved is None:

1749

1533

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

1750

1534

client.name)

1751

1535

if self.server.use_dbus:

1764

1548

#wait until timeout or approved

1765

1549

time = datetime.datetime.now()

1766

1550

client.changedstate.acquire()

1767

client.changedstate.wait(

1768

float(timedelta_to_milliseconds(delay)

1769

/ 1000))

1551

(client.changedstate.wait

1552

(float(client._timedelta_to_milliseconds(delay)

1553

/ 1000)))

1770

1554

client.changedstate.release()

1771

1555

time2 = datetime.datetime.now()

1772

1556

if (time2 - time) >= delay:

1788

1572

try:

1789

1573

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

1790

1574

except gnutls.errors.GNUTLSError as error:

1791

logger.warning("gnutls send failed",

1792

exc_info=error)

1575

logger.warning("gnutls send failed")

1793

1576

return

1794

1577

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

1795

1578

sent, len(client.secret)

1798

1581

1799

1582

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

1800

1583

# bump the timeout using extended_timeout

1801

client.bump_timeout(client.extended_timeout)

1584

client.checked_ok(client.extended_timeout)

1802

1585

if self.server.use_dbus:

1803

1586

# Emit D-Bus signal

1804

1587

client.GotSecret()

1809

1592

try:

1810

1593

session.bye()

1811

1594

except gnutls.errors.GNUTLSError as error:

1812

logger.warning("GnuTLS bye failed",

1813

exc_info=error)

1595

logger.warning("GnuTLS bye failed")

1814

1596

1815

1597

@staticmethod

1816

1598

def peer_certificate(session):

1881

1663

def sub_process_main(self, request, address):

1882

1664

try:

1883

1665

self.finish_request(request, address)

1884

except Exception:

1666

except:

1885

1667

self.handle_error(request, address)

1886

1668

self.close_request(request)

1887

1669

1888

1670

def process_request(self, request, address):

1889

1671

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

1890

1672

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

1891

args = (request, address))

1673

args = (request,

1674

address))

1892

1675

proc.start()

1893

1676

return proc

1894

1677

1922

1705

use_ipv6: Boolean; to use IPv6 or not

1923

1706

"""

1924

1707

def __init__(self, server_address, RequestHandlerClass,

1925

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

1926

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

1927

creating a new one with socket.socket().

1928

"""

1708

interface=None, use_ipv6=True):

1929

1709

self.interface = interface

1930

1710

if use_ipv6:

1931

1711

self.address_family = socket.AF_INET6

1932

if socketfd is not None:

1933

# Save the file descriptor

1934

self.socketfd = socketfd

1935

# Save the original socket.socket() function

1936

self.socket_socket = socket.socket

1937

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

1938

#

1939

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

1940

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

1941

# patching socket.socket.)

1942

#

1943

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

1944

@functools.wraps(socket.socket)

1945

def socket_wrapper(*args, **kwargs):

1946

# Restore original function so subsequent calls are

1947

# not affected.

1948

socket.socket = self.socket_socket

1949

del self.socket_socket

1950

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

1951

# saved file descriptor.

1952

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

1953

# Replace socket.socket() function with wrapper

1954

socket.socket = socket_wrapper

1955

# The socketserver.TCPServer.__init__ will call

1956

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

1957

# socket_wrapper(), if socketfd was set.

1958

1712

socketserver.TCPServer.__init__(self, server_address,

1959

1713

RequestHandlerClass)

1960

1961

1714

def server_bind(self):

1962

1715

"""This overrides the normal server_bind() function

1963

1716

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

1971

1724

try:

1972

1725

self.socket.setsockopt(socket.SOL_SOCKET,

1973

1726

SO_BINDTODEVICE,

1974

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

1727

str(self.interface

1728

+ '\0'))

1975

1729

except socket.error as error:

1976

if error.errno == errno.EPERM:

1977

logger.error("No permission to bind to"

1978

" interface %s", self.interface)

1979

elif error.errno == errno.ENOPROTOOPT:

1730

if error[0] == errno.EPERM:

1731

logger.error("No permission to"

1732

" bind to interface %s",

1733

self.interface)

1734

elif error[0] == errno.ENOPROTOOPT:

1980

1735

logger.error("SO_BINDTODEVICE not available;"

1981

1736

" cannot bind to interface %s",

1982

1737

self.interface)

1983

elif error.errno == errno.ENODEV:

1984

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

1985

" cannot bind", self.interface)

1986

1738

else:

1987

1739

raise

1988

1740

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

1991

1743

if self.address_family == socket.AF_INET6:

1992

1744

any_address = "::" # in6addr_any

1993

1745

else:

1994

any_address = "0.0.0.0" # INADDR_ANY

1746

any_address = socket.INADDR_ANY

1995

1747

self.server_address = (any_address,

1996

1748

self.server_address[1])

1997

1749

elif not self.server_address[1]:

2018

1770

"""

2019

1771

def __init__(self, server_address, RequestHandlerClass,

2020

1772

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

2021

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

1773

gnutls_priority=None, use_dbus=True):

2022

1774

self.enabled = False

2023

1775

self.clients = clients

2024

1776

if self.clients is None:

2028

1780

IPv6_TCPServer.__init__(self, server_address,

2029

1781

RequestHandlerClass,

2030

1782

interface = interface,

2031

use_ipv6 = use_ipv6,

2032

socketfd = socketfd)

1783

use_ipv6 = use_ipv6)

2033

1784

def server_activate(self):

2034

1785

if self.enabled:

2035

1786

return socketserver.TCPServer.server_activate(self)

2048

1799

2049

1800

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

2050

1801

proc = None, client_object=None):

1802

condition_names = {

1803

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

1804

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

1805

# blocking).

1806

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

1807

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

1808

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

1809

# broken, usually for pipes and

1810

# sockets).

1811

}

1812

conditions_string = ' | '.join(name

1813

for cond, name in

1814

condition_names.iteritems()

1815

if cond & condition)

2051

1816

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

2052

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

1817

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

2053

1818

# Wait for other process to exit

2054

1819

proc.join()

2055

1820

return False

2113

1878

return True

2114

1879

2115

1880

2116

def rfc3339_duration_to_delta(duration):

2117

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

2118

2119

>>> rfc3339_duration_to_delta("P7D")

2120

datetime.timedelta(7)

2121

>>> rfc3339_duration_to_delta("PT60S")

2122

datetime.timedelta(0, 60)

2123

>>> rfc3339_duration_to_delta("PT60M")

2124

datetime.timedelta(0, 3600)

2125

>>> rfc3339_duration_to_delta("PT24H")

2126

datetime.timedelta(1)

2127

>>> rfc3339_duration_to_delta("P1W")

2128

datetime.timedelta(7)

2129

>>> rfc3339_duration_to_delta("PT5M30S")

2130

datetime.timedelta(0, 330)

2131

>>> rfc3339_duration_to_delta("P1DT3M20S")

2132

datetime.timedelta(1, 200)

2133

"""

2134

2135

# Parsing an RFC 3339 duration with regular expressions is not

2136

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

2137

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

2138

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

2139

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

2140

# avoid excessive use of external libraries.

2141

2142

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

2143

Token = collections.namedtuple("Token",

2144

("regexp", # To match token; if

2145

# "value" is not None,

2146

# must have a "group"

2147

# containing digits

2148

"value", # datetime.timedelta or

2149

# None

2150

"followers")) # Tokens valid after

2151

# this token

2152

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

2153

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

2154

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

2155

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

2156

datetime.timedelta(seconds=1),

2157

frozenset((token_end,)))

2158

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

2159

datetime.timedelta(minutes=1),

2160

frozenset((token_second, token_end)))

2161

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

2162

datetime.timedelta(hours=1),

2163

frozenset((token_minute, token_end)))

2164

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

2165

None,

2166

frozenset((token_hour, token_minute,

2167

token_second)))

2168

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

2169

datetime.timedelta(days=1),

2170

frozenset((token_time, token_end)))

2171

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

2172

datetime.timedelta(weeks=4),

2173

frozenset((token_day, token_end)))

2174

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

2175

datetime.timedelta(weeks=52),

2176

frozenset((token_month, token_end)))

2177

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

2178

datetime.timedelta(weeks=1),

2179

frozenset((token_end,)))

2180

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

2181

frozenset((token_year, token_month,

2182

token_day, token_time,

2183

token_week))),

2184

# Define starting values

2185

value = datetime.timedelta() # Value so far

2186

found_token = None

2187

followers = frozenset(token_duration,) # Following valid tokens

2188

s = duration # String left to parse

2189

# Loop until end token is found

2190

while found_token is not token_end:

2191

# Search for any currently valid tokens

2192

for token in followers:

2193

match = token.regexp.match(s)

2194

if match is not None:

2195

# Token found

2196

if token.value is not None:

2197

# Value found, parse digits

2198

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

2199

# Add to value so far

2200

value += factor * token.value

2201

# Strip token from string

2202

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

2203

# Go to found token

2204

found_token = token

2205

# Set valid next tokens

2206

followers = found_token.followers

2207

break

2208

else:

2209

# No currently valid tokens were found

2210

raise ValueError("Invalid RFC 3339 duration")

2211

# End token found

2212

return value

2213

2214

2215

1881

def string_to_delta(interval):

2216

1882

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

2217

1883

2228

1894

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

2229

1895

datetime.timedelta(0, 330)

2230

1896

"""

2231

2232

try:

2233

return rfc3339_duration_to_delta(interval)

2234

except ValueError:

2235

pass

2236

2237

1897

timevalue = datetime.timedelta(0)

2238

1898

for s in interval.split():

2239

1899

try:

2250

1910

elif suffix == "w":

2251

1911

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

2252

1912

else:

2253

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

2254

.format(suffix))

1913

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

2255

1914

except (ValueError, IndexError) as e:

2256

1915

raise ValueError(*(e.args))

2257

1916

timevalue += delta

2271

1930

sys.exit()

2272

1931

if not noclose:

2273

1932

# Close all standard open file descriptors

2274

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

1933

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

2275

1934

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

2276

1935

raise OSError(errno.ENODEV,

2277

"{0} not a character device"

2278

.format(os.devnull))

1936

"%s not a character device"

1937

% os.path.devnull)

2279

1938

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

2280

1939

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

2281

1940

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

2290

1949

2291

1950

parser = argparse.ArgumentParser()

2292

1951

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

2293

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

1952

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

2294

1953

help="show version number and exit")

2295

1954

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

2296

1955

help="Bind to interface IF")

2302

1961

help="Run self-test")

2303

1962

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

2304

1963

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

2305

" to terminal", default=None)

1964

" to terminal")

2306

1965

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

2307

1966

help="Debug level for stdout output")

2308

1967

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

2315

1974

" files")

2316

1975

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

2317

1976

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

2318

" system bus interface", default=None)

1977

" system bus interface")

2319

1978

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

2320

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

2321

default=None)

1979

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

2322

1980

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

2323

1981

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

2324

" state", default=None)

2325

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

2326

help="Specify a file descriptor to a network"

2327

" socket to use instead of creating one")

1982

" state")

2328

1983

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

2329

1984

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

2330

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

2331

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

2332

1985

2333

1986

options = parser.parse_args()

2334

1987

2343

1996

"port": "",

2344

1997

"debug": "False",

2345

1998

"priority":

2346

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

1999

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

2347

2000

"servicename": "Mandos",

2348

2001

"use_dbus": "True",

2349

2002

"use_ipv6": "True",

2350

2003

"debuglevel": "",

2351

2004

"restore": "True",

2352

"socket": "",

2353

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

2354

"foreground": "False",

2005

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

2355

2006

}

2356

2007

2357

2008

# Parse config file for server-global settings

2362

2013

# Convert the SafeConfigParser object to a dict

2363

2014

server_settings = server_config.defaults()

2364

2015

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

2365

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

2016

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

2366

2017

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

2367

2018

option)

2368

2019

if server_settings["port"]:

2369

2020

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

2370

2021

"port")

2371

if server_settings["socket"]:

2372

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

2373

"socket")

2374

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

2375

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

2376

# happen with a supplied network socket.

2377

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

2378

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

2379

["socket"])

2380

2022

del server_config

2381

2023

2382

2024

# Override the settings from the config file with command line

2384

2026

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

2385

2027

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

2386

2028

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

2387

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

2029

"statedir"):

2388

2030

value = getattr(options, option)

2389

2031

if value is not None:

2390

2032

server_settings[option] = value

2393

2035

for option in server_settings.keys():

2394

2036

if type(server_settings[option]) is str:

2395

2037

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

2396

# Force all boolean options to be boolean

2397

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

2398

"foreground"):

2399

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

2400

# Debug implies foreground

2401

if server_settings["debug"]:

2402

server_settings["foreground"] = True

2403

2038

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

2404

2039

2405

2040

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

2411

2046

use_ipv6 = server_settings["use_ipv6"]

2412

2047

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

2413

2048

stored_state_file)

2414

foreground = server_settings["foreground"]

2415

2049

2416

2050

if debug:

2417

initlogger(debug, logging.DEBUG)

2051

initlogger(logging.DEBUG)

2418

2052

else:

2419

2053

if not debuglevel:

2420

initlogger(debug)

2054

initlogger()

2421

2055

else:

2422

2056

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

2423

initlogger(debug, level)

2057

initlogger(level)

2424

2058

2425

2059

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

2426

2060

syslogger.setFormatter(logging.Formatter

2427

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

2428

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

2429

.format(server_settings

2430

["servicename"])))

2061

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

2062

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

2063

% server_settings["servicename"]))

2431

2064

2432

2065

# Parse config file with clients

2433

client_config = configparser.SafeConfigParser(Client

2434

.client_defaults)

2066

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

2067

"extended_timeout": "15m",

2068

"interval": "2m",

2069

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

2070

"host": "",

2071

"approval_delay": "0s",

2072

"approval_duration": "1s",

2073

}

2074

client_config = configparser.SafeConfigParser(client_defaults)

2435

2075

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

2436

2076

"clients.conf"))

2437

2077

2446

2086

use_ipv6=use_ipv6,

2447

2087

gnutls_priority=

2448

2088

server_settings["priority"],

2449

use_dbus=use_dbus,

2450

socketfd=(server_settings["socket"]

2451

or None))

2452

if not foreground:

2089

use_dbus=use_dbus)

2090

if not debug:

2453

2091

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

2454

pidfile = None

2455

2092

try:

2456

2093

pidfile = open(pidfilename, "w")

2457

except IOError as e:

2458

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

2459

exc_info=e)

2094

except IOError:

2095

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

2460

2096

2461

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

2097

try:

2098

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

2099

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

2100

except KeyError:

2462

2101

try:

2463

uid = pwd.getpwnam(name).pw_uid

2464

gid = pwd.getpwnam(name).pw_gid

2465

break

2102

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

2103

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

2466

2104

except KeyError:

2467

continue

2468

else:

2469

uid = 65534

2470

gid = 65534

2105

try:

2106

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

2107

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

2108

except KeyError:

2109

uid = 65534

2110

gid = 65534

2471

2111

try:

2472

2112

os.setgid(gid)

2473

2113

os.setuid(uid)

2474

2114

except OSError as error:

2475

if error.errno != errno.EPERM:

2115

if error[0] != errno.EPERM:

2476

2116

raise error

2477

2117

2478

2118

if debug:

2490

2130

.gnutls_global_set_log_function(debug_gnutls))

2491

2131

2492

2132

# Redirect stdin so all checkers get /dev/null

2493

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

2133

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

2494

2134

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

2495

2135

if null > 2:

2496

2136

os.close(null)

2137

else:

2138

# No console logging

2139

logger.removeHandler(console)

2497

2140

2498

2141

# Need to fork before connecting to D-Bus

2499

if not foreground:

2142

if not debug:

2500

2143

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

2501

2144

daemon()

2502

2145

2503

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

2504

# need to inform gobject that threads will be used.

2505

gobject.threads_init()

2506

2507

2146

global main_loop

2508

2147

# From the Avahi example code

2509

DBusGMainLoop(set_as_default=True)

2148

DBusGMainLoop(set_as_default=True )

2510

2149

main_loop = gobject.MainLoop()

2511

2150

bus = dbus.SystemBus()

2512

2151

# End of Avahi example code

2518

2157

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

2519

2158

do_not_queue=True))

2520

2159

except dbus.exceptions.NameExistsException as e:

2521

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

2160

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

2522

2161

use_dbus = False

2523

2162

server_settings["use_dbus"] = False

2524

2163

tcp_server.use_dbus = False

2536

2175

2537

2176

client_class = Client

2538

2177

if use_dbus:

2539

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

2540

2541

client_settings = Client.config_parser(client_config)

2178

client_class = functools.partial(ClientDBusTransitional,

2179

bus = bus)

2180

2181

special_settings = {

2182

# Some settings need to be accessd by special methods;

2183

# booleans need .getboolean(), etc. Here is a list of them:

2184

"approved_by_default":

2185

lambda section:

2186

client_config.getboolean(section, "approved_by_default"),

2187

"enabled":

2188

lambda section:

2189

client_config.getboolean(section, "enabled"),

2190

}

2191

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

2192

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

2193

# with exceptions for any special settings as defined above

2194

client_settings = dict((clientname,

2195

dict((setting,

2196

(value

2197

if setting not in special_settings

2198

else special_settings[setting]

2199

(clientname)))

2200

for setting, value in

2201

client_config.items(clientname)))

2202

for clientname in client_config.sections())

2203

2542

2204

old_client_settings = {}

2543

clients_data = {}

2544

2545

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

2546

global wnull

2547

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

2548

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

2549

# mode

2550

if debug or not foreground:

2551

wnull.close()

2205

clients_data = []

2552

2206

2553

2207

# Get client data and settings from last running state.

2554

2208

if server_settings["restore"]:

2558

2212

(stored_state))

2559

2213

os.remove(stored_state_path)

2560

2214

except IOError as e:

2561

if e.errno == errno.ENOENT:

2562

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

2563

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

2564

else:

2565

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

2566

exc_info=e)

2215

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

2216

.format(e))

2217

if e.errno != errno.ENOENT:

2567

2218

raise

2568

except EOFError as e:

2569

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

2570

"EOFError:", exc_info=e)

2571

2219

2572

with PGPEngine() as pgp:

2573

for client_name, client in clients_data.iteritems():

2574

# Skip removed clients

2575

if client_name not in client_settings:

2576

continue

2220

with Crypto() as crypt:

2221

for client in clients_data:

2222

client_name = client["name"]

2577

2223

2578

2224

# Decide which value to use after restoring saved state.

2579

2225

# We have three different values: Old config file,

2588

2234

if (name != "secret" and

2589

2235

value != old_client_settings[client_name]

2590

2236

[name]):

2591

client[name] = value

2237

setattr(client, name, value)

2592

2238

except KeyError:

2593

2239

pass

2594

2240

2595

2241

# Clients who has passed its expire date can still be

2596

# enabled if its last checker was successful. Clients

2597

# whose checker succeeded before we stored its state is

2598

# assumed to have successfully run all checkers during

2599

# downtime.

2600

if client["enabled"]:

2601

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

2602

if not client["last_checked_ok"]:

2603

logger.warning(

2604

"disabling client {0} - Client never "

2605

"performed a successful checker"

2606

.format(client_name))

2607

client["enabled"] = False

2608

elif client["last_checker_status"] != 0:

2609

logger.warning(

2610

"disabling client {0} - Client "

2611

"last checker failed with error code {1}"

2612

.format(client_name,

2613

client["last_checker_status"]))

2242

# enabled if its last checker was sucessful. Clients

2243

# whose checker failed before we stored its state is

2244

# assumed to have failed all checkers during downtime.

2245

if client["enabled"] and client["last_checked_ok"]:

2246

if ((datetime.datetime.utcnow()

2247

- client["last_checked_ok"])

2248

> client["interval"]):

2249

if client["last_checker_status"] != 0:

2614

2250

client["enabled"] = False

2615

2251

else:

2616

2252

client["expires"] = (datetime.datetime

2617

2253

.utcnow()

2618

2254

+ client["timeout"])

2619

logger.debug("Last checker succeeded,"

2620

" keeping {0} enabled"

2621

.format(client_name))

2255

2256

client["changedstate"] = (multiprocessing_manager

2257

.Condition

2258

(multiprocessing_manager

2259

.Lock()))

2260

if use_dbus:

2261

new_client = (ClientDBusTransitional.__new__

2262

(ClientDBusTransitional))

2263

tcp_server.clients[client_name] = new_client

2264

new_client.bus = bus

2265

for name, value in client.iteritems():

2266

setattr(new_client, name, value)

2267

client_object_name = unicode(client_name).translate(

2268

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

2269

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

2270

new_client.dbus_object_path = (dbus.ObjectPath

2271

("/clients/"

2272

+ client_object_name))

2273

DBusObjectWithProperties.__init__(new_client,

2274

new_client.bus,

2275

new_client

2276

.dbus_object_path)

2277

else:

2278

tcp_server.clients[client_name] = (Client.__new__

2279

(Client))

2280

for name, value in client.iteritems():

2281

setattr(tcp_server.clients[client_name],

2282

name, value)

2283

2622

2284

try:

2623

client["secret"] = (

2624

pgp.decrypt(client["encrypted_secret"],

2625

client_settings[client_name]

2626

["secret"]))

2627

except PGPError:

2285

tcp_server.clients[client_name].secret = (

2286

crypt.decrypt(tcp_server.clients[client_name]

2287

.encrypted_secret,

2288

client_settings[client_name]

2289

["secret"]))

2290

except CryptoError:

2628

2291

# If decryption fails, we use secret from new settings

2629

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

2630

.format(client_name))

2631

client["secret"] = (

2292

tcp_server.clients[client_name].secret = (

2632

2293

client_settings[client_name]["secret"])

2633

2294

2634

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

2635

for client_name in (set(old_client_settings)

2636

- set(client_settings)):

2637

del clients_data[client_name]

2638

for client_name in (set(client_settings)

2639

- set(old_client_settings)):

2640

clients_data[client_name] = client_settings[client_name]

2641

2642

# Create all client objects

2643

for client_name, client in clients_data.iteritems():

2644

tcp_server.clients[client_name] = client_class(

2645

name = client_name, settings = client,

2646

server_settings = server_settings)

2295

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

2296

for clientname in set(old_client_settings) - set(client_settings):

2297

del tcp_server.clients[clientname]

2298

for clientname in set(client_settings) - set(old_client_settings):

2299

tcp_server.clients[clientname] = (client_class(name

2300

= clientname,

2301

config =

2302

client_settings

2303

[clientname]))

2647

2304

2648

2305

if not tcp_server.clients:

2649

2306

logger.warning("No clients defined")

2650

2651

if not foreground:

2652

if pidfile is not None:

2653

try:

2654

with pidfile:

2655

pid = os.getpid()

2656

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

2657

except IOError:

2658

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

2659

pidfilename, pid)

2660

del pidfile

2307

2308

if not debug:

2309

try:

2310

with pidfile:

2311

pid = os.getpid()

2312

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

2313

del pidfile

2314

except IOError:

2315

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

2316

pidfilename, pid)

2317

except NameError:

2318

# "pidfile" was never created

2319

pass

2661

2320

del pidfilename

2321

2322

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

2662

2323

2663

2324

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

2664

2325

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

2665

2326

2666

2327

if use_dbus:

2667

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

2668

"se.bsnet.fukt.Mandos"})

2669

class MandosDBusService(DBusObjectWithProperties):

2328

class MandosDBusService(dbus.service.Object):

2670

2329

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

2671

2330

def __init__(self):

2672

2331

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

2673

2332

_interface = "se.recompile.Mandos"

2674

2333

2675

@dbus_interface_annotations(_interface)

2676

def _foo(self):

2677

return { "org.freedesktop.DBus.Property"

2678

".EmitsChangedSignal":

2679

"false"}

2680

2681

2334

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

2682

2335

def ClientAdded(self, objpath):

2683

2336

"D-Bus signal"

2725

2378

2726

2379

del _interface

2727

2380

2728

mandos_dbus_service = MandosDBusService()

2381

class MandosDBusServiceTransitional(MandosDBusService):

2382

__metaclass__ = AlternateDBusNamesMetaclass

2383

mandos_dbus_service = MandosDBusServiceTransitional()

2729

2384

2730

2385

def cleanup():

2731

2386

"Cleanup function; run on exit"

2732

2387

service.cleanup()

2733

2388

2734

2389

multiprocessing.active_children()

2735

wnull.close()

2736

2390

if not (tcp_server.clients or client_settings):

2737

2391

return

2738

2392

2739

2393

# Store client before exiting. Secrets are encrypted with key

2740

2394

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

2741

2395

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

2742

clients = {}

2743

with PGPEngine() as pgp:

2396

clients = []

2397

with Crypto() as crypt:

2744

2398

for client in tcp_server.clients.itervalues():

2745

2399

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

2746

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

2747

key)

2400

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

2401

key)

2748

2402

client_dict = {}

2749

2403

2750

# A list of attributes that can not be pickled

2751

# + secret.

2752

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

2753

"checker", "server_settings"))

2404

# A list of attributes that will not be stored when

2405

# shutting down.

2406

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

2754

2407

for name, typ in (inspect.getmembers

2755

2408

(dbus.service.Object)):

2756

2409

exclude.add(name)

2761

2414

if attr not in exclude:

2762

2415

client_dict[attr] = getattr(client, attr)

2763

2416

2764

clients[client.name] = client_dict

2417

clients.append(client_dict)

2765

2418

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

2766

2419

2767

2420

try:

2768

with (tempfile.NamedTemporaryFile

2769

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

2770

dir=os.path.dirname(stored_state_path),

2771

delete=False)) as stored_state:

2421

with os.fdopen(os.open(stored_state_path,

2422

os.O_CREAT|os.O_WRONLY|os.O_TRUNC,

2423

0600), "wb") as stored_state:

2772

2424

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

2773

tempname=stored_state.name

2774

os.rename(tempname, stored_state_path)

2775

2425

except (IOError, OSError) as e:

2776

if not debug:

2777

try:

2778

os.remove(tempname)

2779

except NameError:

2780

pass

2781

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

2782

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

2783

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

2784

else:

2785

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

2786

exc_info=e)

2787

raise e

2426

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

2427

.format(e))

2428

if e.errno not in (errno.ENOENT, errno.EACCES):

2429

raise

2788

2430

2789

2431

# Delete all clients, and settings from config

2790

2432

while tcp_server.clients:

2817

2459

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

2818

2460

if use_ipv6:

2819

2461

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

2820

" flowinfo %d, scope_id %d",

2821

*tcp_server.socket.getsockname())

2462

" flowinfo %d, scope_id %d"

2463

% tcp_server.socket.getsockname())

2822

2464

else: # IPv4

2823

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

2824

*tcp_server.socket.getsockname())

2465

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

2466

% tcp_server.socket.getsockname())

2825

2467

2826

2468

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

2827

2469

2830

2472

try:

2831

2473

service.activate()

2832

2474

except dbus.exceptions.DBusException as error:

2833

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

2475

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

2834

2476

cleanup()

2835

2477

sys.exit(1)

2836

2478

# End of Avahi example code

2843

2485

logger.debug("Starting main loop")

2844

2486

main_loop.run()

2845

2487

except AvahiError as error:

2846

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

2488

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

2847

2489

cleanup()

2848

2490

sys.exit(1)

2849

2491

except KeyboardInterrupt:

2854

2496

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

2855

2497

cleanup()

2856

2498

2499

2857

2500

if __name__ == '__main__':

2858

2501

main()