/mandos/trunk : revision 472

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# along with this program. If not, see

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

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#

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

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# Contact the authors at <mandos@fukt.bsnet.se>.

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#

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from __future__ import (division, absolute_import, print_function,

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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 optparse

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import datetime

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import errno

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import gnutls.crypto

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import functools

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import 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 = "1.4.1"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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version = "1.2.3"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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def initlogger(level=logging.WARNING):

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"""init logger and add loglevel"""

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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

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pass

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class PGPEngine(object):

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

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def __init__(self):

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self.gnupg = GnuPGInterface.GnuPG()

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

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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

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'--quiet'])

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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def encrypt(self, data, password):

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

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with open(os.devnull) as devnull:

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return ciphertext

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def decrypt(self, data, password):

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

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with open(os.devnull) as devnull:

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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decrypted_plaintext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return decrypted_plaintext

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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class AvahiError(Exception):

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

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self.group = None # our entry group

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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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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

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self.name = unicode(self.server.GetAlternativeServiceName(self.name))

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

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self.name)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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except dbus.exceptions.DBusException, 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.remove()

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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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if self.group is None:

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self.group = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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self.server.EntryGroupNew()),

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self.entry_group_state_changed))

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self.group.connect_to_signal('StateChanged',

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self

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.entry_group_state_changed)

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

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self.name, self.type)

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self.group.AddService(

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def cleanup(self):

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

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if self.group is not None:

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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException):

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pass

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self.group.Free()

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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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def server_state_changed(self, state):

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

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

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bad_states = { avahi.SERVER_INVALID:

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"Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION:

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"Zeroconf server name collision",

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avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

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if state in bad_states:

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if bad_states[state] is not None:

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if error is None:

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logger.error(bad_states[state])

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else:

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

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self.cleanup()

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if state == avahi.SERVER_COLLISION:

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logger.error("Zeroconf server name collision")

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self.remove()

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elif state == avahi.SERVER_RUNNING:

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self.add()

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else:

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if error is None:

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

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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 = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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avahi.DBUS_PATH_SERVER,

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follow_name_owner_changes=True),

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avahi.DBUS_PATH_SERVER),

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avahi.DBUS_INTERFACE_SERVER)

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self.server.connect_to_signal("StateChanged",

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self.server_state_changed)

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self.server_state_changed(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 (%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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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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class Client(object):

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

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Attributes:

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

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

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

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

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

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

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checker_initiator_tag: a gobject event source tag, or None

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

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client_structure: Object describing what attributes a client has

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and is used for storing the client at exit

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current_checker_command: string; current running checker_command

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

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disable_initiator_tag: a gobject event source tag, or None

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enabled: bool()

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

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

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

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

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last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, or None.

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

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last_enabled: datetime.datetime(); (UTC)

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

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D-Bus identifiers

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

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

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until this client is disabled

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extended_timeout: extra long timeout when password has been sent

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runtime_expansions: Allowed attributes for runtime expansion.

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

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disabled, or None

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"""

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runtime_expansions = ("approval_delay", "approval_duration",

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

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

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

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

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"extended_timeout": "15m",

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"interval": "2m",

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

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"host": "",

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"approval_delay": "0s",

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"approval_duration": "1s",

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"approved_by_default": "True",

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"enabled": "True",

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}

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@staticmethod

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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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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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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)

290

return self._timedelta_to_milliseconds(self.timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

454

return timedelta_to_milliseconds(self.interval)

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return self._timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

457

return timedelta_to_milliseconds(self.approval_delay)

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459

@staticmethod

460

def config_parser(config):

461

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

462

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

463

with exceptions for any special settings as defined above"""

464

settings = {}

465

for client_name in config.sections():

466

section = dict(config.items(client_name))

467

client = settings[client_name] = {}

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

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# Reformat values from string types to Python types

471

client["approved_by_default"] = config.getboolean(

472

client_name, "approved_by_default")

473

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

474

475

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

476

.replace(" ", ""))

477

if "secret" in section:

478

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

479

elif "secfile" in section:

480

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

481

(section["secfile"])),

482

"rb") as secfile:

483

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

484

else:

485

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

486

% section)

487

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

488

client["extended_timeout"] = string_to_delta(

489

section["extended_timeout"])

490

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

491

client["approval_delay"] = string_to_delta(

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section["approval_delay"])

493

client["approval_duration"] = string_to_delta(

494

section["approval_duration"])

495

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

496

client["last_approval_request"] = None

497

client["last_checked_ok"] = None

498

client["last_checker_status"] = None

499

if client["enabled"]:

500

client["last_enabled"] = datetime.datetime.utcnow()

501

client["expires"] = (datetime.datetime.utcnow()

502

+ client["timeout"])

503

else:

504

client["last_enabled"] = None

505

client["expires"] = None

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507

return settings

508

509

510

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

297

return self._timedelta_to_milliseconds(self.approval_delay)

298

299

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

511

300

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

512

301

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

513

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attribute."""

514

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self.name = name

515

# adding all client settings

516

for setting, value in settings.iteritems():

517

setattr(self, setting, value)

518

304

if config is None:

305

config = {}

519

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

520

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# Uppercase and remove spaces from fingerprint for later

521

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# comparison purposes with return value from the fingerprint()

522

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# function

310

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

311

.replace(" ", ""))

523

312

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

524

self.created = settings.get("created", datetime.datetime.utcnow())

525

526

# attributes specific for this server instance

313

if "secret" in config:

314

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

315

elif "secfile" in config:

316

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

317

(config["secfile"])),

318

"rb") as secfile:

319

self.secret = secfile.read()

320

else:

321

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

322

% self.name)

323

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

324

self.created = datetime.datetime.utcnow()

325

self.enabled = False

326

self.last_approval_request = None

327

self.last_enabled = None

328

self.last_checked_ok = None

329

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

330

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

331

self.disable_hook = disable_hook

527

332

self.checker = None

528

333

self.checker_initiator_tag = None

529

334

self.disable_initiator_tag = None

530

335

self.checker_callback_tag = None

336

self.checker_command = config["checker"]

531

337

self.current_checker_command = None

532

self.approved = None

338

self.last_connect = None

339

self._approved = None

340

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

341

True)

533

342

self.approvals_pending = 0

534

self.changedstate = (multiprocessing_manager

535

.Condition(multiprocessing_manager

536

.Lock()))

537

self.client_structure = [attr for attr in

538

self.__dict__.iterkeys()

539

if not attr.startswith("_")]

540

self.client_structure.append("client_structure")

541

542

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

543

lambda obj:

544

isinstance(obj,

545

property)):

546

if not name.startswith("_"):

547

self.client_structure.append(name)

343

self.approval_delay = string_to_delta(

344

config["approval_delay"])

345

self.approval_duration = string_to_delta(

346

config["approval_duration"])

347

self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())

548

348

549

# Send notice to process children that client state has changed

550

349

def send_changedstate(self):

551

with self.changedstate:

552

self.changedstate.notify_all()

553

350

self.changedstate.acquire()

351

self.changedstate.notify_all()

352

self.changedstate.release()

353

554

354

def enable(self):

555

355

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

556

356

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

557

357

# Already enabled

558

358

return

559

359

self.send_changedstate()

560

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

561

self.enabled = True

562

360

self.last_enabled = datetime.datetime.utcnow()

563

self.init_checker()

361

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

362

# and every interval from then on.

363

self.checker_initiator_tag = (gobject.timeout_add

364

(self.interval_milliseconds(),

365

self.start_checker))

366

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

367

self.disable_initiator_tag = (gobject.timeout_add

368

(self.timeout_milliseconds(),

369

self.disable))

370

self.enabled = True

371

# Also start a new checker *right now*.

372

self.start_checker()

564

373

565

374

def disable(self, quiet=True):

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375

"""Disable this client."""

573

382

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

574

383

gobject.source_remove(self.disable_initiator_tag)

575

384

self.disable_initiator_tag = None

576

self.expires = None

577

385

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

578

386

gobject.source_remove(self.checker_initiator_tag)

579

387

self.checker_initiator_tag = None

580

388

self.stop_checker()

389

if self.disable_hook:

390

self.disable_hook(self)

581

391

self.enabled = False

582

392

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

583

393

return False

584

394

585

395

def __del__(self):

396

self.disable_hook = None

586

397

self.disable()

587

398

588

def init_checker(self):

589

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

590

# and every interval from then on.

591

self.checker_initiator_tag = (gobject.timeout_add

592

(self.interval_milliseconds(),

593

self.start_checker))

594

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

595

self.disable_initiator_tag = (gobject.timeout_add

596

(self.timeout_milliseconds(),

597

self.disable))

598

# Also start a new checker *right now*.

599

self.start_checker()

600

601

399

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

602

400

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

603

401

self.checker_callback_tag = None

604

402

self.checker = None

605

403

if os.WIFEXITED(condition):

606

self.last_checker_status = os.WEXITSTATUS(condition)

607

if self.last_checker_status == 0:

404

exitstatus = os.WEXITSTATUS(condition)

405

if exitstatus == 0:

608

406

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

609

407

vars(self))

610

408

self.checked_ok()

612

410

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

613

411

vars(self))

614

412

else:

615

self.last_checker_status = -1

616

413

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

617

414

vars(self))

618

415

619

def checked_ok(self, timeout=None):

416

def checked_ok(self):

620

417

"""Bump up the timeout for this client.

621

418

622

419

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

623

420

alive and well.

624

421

"""

625

if timeout is None:

626

timeout = self.timeout

627

422

self.last_checked_ok = datetime.datetime.utcnow()

628

if self.disable_initiator_tag is not None:

629

gobject.source_remove(self.disable_initiator_tag)

630

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

631

self.disable_initiator_tag = (gobject.timeout_add

632

(timedelta_to_milliseconds

633

(timeout), self.disable))

634

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

423

gobject.source_remove(self.disable_initiator_tag)

424

self.disable_initiator_tag = (gobject.timeout_add

425

(self.timeout_milliseconds(),

426

self.disable))

635

427

636

428

def need_approval(self):

637

429

self.last_approval_request = datetime.datetime.utcnow()

653

445

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

654

446

try:

655

447

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

656

except (AttributeError, OSError) as error:

448

except (AttributeError, OSError), error:

657

449

if (isinstance(error, OSError)

658

450

and error.errno != errno.ECHILD):

659

451

raise error

677

469

'replace')))

678

470

for attr in

679

471

self.runtime_expansions)

680

472

681

473

try:

682

474

command = self.checker_command % escaped_attrs

683

except TypeError as error:

475

except TypeError, error:

684

476

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

685

477

' %s', self.checker_command, error)

686

478

return True # Try again later

705

497

if pid:

706

498

gobject.source_remove(self.checker_callback_tag)

707

499

self.checker_callback(pid, status, command)

708

except OSError as error:

500

except OSError, error:

709

501

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

710

502

error)

711

503

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

724

516

#time.sleep(0.5)

725

517

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

726

518

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

727

except OSError as error:

519

except OSError, error:

728

520

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

729

521

raise

730

522

self.checker = None

731

523

732

733

524

def dbus_service_property(dbus_interface, signature="v",

734

525

access="readwrite", byte_arrays=False):

735

526

"""Decorators for marking methods of a DBusObjectWithProperties to

781

572

782

573

class DBusObjectWithProperties(dbus.service.Object):

783

574

"""A D-Bus object with properties.

784

575

785

576

Classes inheriting from this can use the dbus_service_property

786

577

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

787

578

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

794

585

def _get_all_dbus_properties(self):

795

586

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

796

587

"""

797

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

798

for cls in self.__class__.__mro__

588

return ((prop._dbus_name, prop)

799

589

for name, prop in

800

inspect.getmembers(cls, self._is_dbus_property))

590

inspect.getmembers(self, self._is_dbus_property))

801

591

802

592

def _get_dbus_property(self, interface_name, property_name):

803

593

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

804

594

property with the specified name and interface.

805

595

"""

806

for cls in self.__class__.__mro__:

807

for name, value in (inspect.getmembers

808

(cls, self._is_dbus_property)):

809

if (value._dbus_name == property_name

810

and value._dbus_interface == interface_name):

811

return value.__get__(self)

812

596

for name in (property_name,

597

property_name + "_dbus_property"):

598

prop = getattr(self, name, None)

599

if (prop is None

600

or not self._is_dbus_property(prop)

601

or prop._dbus_name != property_name

602

or (interface_name and prop._dbus_interface

603

and interface_name != prop._dbus_interface)):

604

continue

605

return prop

813

606

# No such property

814

607

raise DBusPropertyNotFound(self.dbus_object_path + ":"

815

608

+ interface_name + "."

849

642

def GetAll(self, interface_name):

850

643

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

851

644

standard.

852

645

853

646

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

854

647

"""

855

properties = {}

648

all = {}

856

649

for name, prop in self._get_all_dbus_properties():

857

650

if (interface_name

858

651

and interface_name != prop._dbus_interface):

863

656

continue

864

657

value = prop()

865

658

if not hasattr(value, "variant_level"):

866

properties[name] = value

659

all[name] = value

867

660

continue

868

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

869

value.variant_level+1)

870

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

661

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

662

value.variant_level+1)

663

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

871

664

872

665

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

873

666

out_signature="s",

911

704

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

912

705

document.unlink()

913

706

except (AttributeError, xml.dom.DOMException,

914

xml.parsers.expat.ExpatError) as error:

707

xml.parsers.expat.ExpatError), error:

915

708

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

916

709

error)

917

710

return xmlstring

918

711

919

712

920

def datetime_to_dbus (dt, variant_level=0):

921

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

922

if dt is None:

923

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

924

return dbus.String(dt.isoformat(),

925

variant_level=variant_level)

926

927

928

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

929

.__metaclass__):

930

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

931

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

932

"""

933

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

934

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

935

# methods, signals, or properties in them

936

for base in (b for b in bases

937

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

938

# Go though all attributes of the base class

939

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

940

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

941

# with the wrong interface name

942

if (not hasattr(attribute, "_dbus_interface")

943

or not attribute._dbus_interface

944

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

945

continue

946

# Create an alternate D-Bus interface name based on

947

# the current name

948

alt_interface = (attribute._dbus_interface

949

.replace("se.recompile.Mandos",

950

"se.bsnet.fukt.Mandos"))

951

# Is this a D-Bus signal?

952

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

953

# Extract the original non-method function by

954

# black magic

955

nonmethod_func = (dict(

956

zip(attribute.func_code.co_freevars,

957

attribute.__closure__))["func"]

958

.cell_contents)

959

# Create a new, but exactly alike, function

960

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

961

# with the alternate D-Bus interface name

962

new_function = (dbus.service.signal

963

(alt_interface,

964

attribute._dbus_signature)

965

(types.FunctionType(

966

nonmethod_func.func_code,

967

nonmethod_func.func_globals,

968

nonmethod_func.func_name,

969

nonmethod_func.func_defaults,

970

nonmethod_func.func_closure)))

971

# Define a creator of a function to call both the

972

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

973

# signals gets sent when the function is called

974

def fixscope(func1, func2):

975

"""This function is a scope container to pass

976

func1 and func2 to the "call_both" function

977

outside of its arguments"""

978

def call_both(*args, **kwargs):

979

"""This function will emit two D-Bus

980

signals by calling func1 and func2"""

981

func1(*args, **kwargs)

982

func2(*args, **kwargs)

983

return call_both

984

# Create the "call_both" function and add it to

985

# the class

986

attr[attrname] = fixscope(attribute,

987

new_function)

988

# Is this a D-Bus method?

989

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

990

# Create a new, but exactly alike, function

991

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

992

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

993

# to the class.

994

attr[attrname] = (dbus.service.method

995

(alt_interface,

996

attribute._dbus_in_signature,

997

attribute._dbus_out_signature)

998

(types.FunctionType

999

(attribute.func_code,

1000

attribute.func_globals,

1001

attribute.func_name,

1002

attribute.func_defaults,

1003

attribute.func_closure)))

1004

# Is this a D-Bus property?

1005

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

1006

# Create a new, but exactly alike, function

1007

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

1008

# property with the alternate D-Bus interface

1009

# name. Add it to the class.

1010

attr[attrname] = (dbus_service_property

1011

(alt_interface,

1012

attribute._dbus_signature,

1013

attribute._dbus_access,

1014

attribute

1015

._dbus_get_args_options

1016

["byte_arrays"])

1017

(types.FunctionType

1018

(attribute.func_code,

1019

attribute.func_globals,

1020

attribute.func_name,

1021

attribute.func_defaults,

1022

attribute.func_closure)))

1023

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

1024

1025

1026

713

class ClientDBus(Client, DBusObjectWithProperties):

1027

714

"""A Client class using D-Bus

1028

715

1037

724

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

1038

725

1039

726

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

727

self._approvals_pending = 0

1040

728

self.bus = bus

1041

729

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

1042

self._approvals_pending = 0

1043

1044

self._approvals_pending = 0

1045

730

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

1046

731

# the D-Bus

1047

732

client_object_name = unicode(self.name).translate(

1052

737

DBusObjectWithProperties.__init__(self, self.bus,

1053

738

self.dbus_object_path)

1054

739

1055

def notifychangeproperty(transform_func,

1056

dbus_name, type_func=lambda x: x,

1057

variant_level=1):

1058

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

1059

its changes to DBus.

1060

1061

transform_fun: Function that takes a value and a variant_level

1062

and transforms it to a D-Bus type.

1063

dbus_name: D-Bus name of the variable

1064

type_func: Function that transform the value before sending it

1065

to the D-Bus. Default: no transform

1066

variant_level: D-Bus variant level. Default: 1

1067

"""

1068

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

1069

def setter(self, value):

1070

if hasattr(self, "dbus_object_path"):

1071

if (not hasattr(self, attrname) or

1072

type_func(getattr(self, attrname, None))

1073

!= type_func(value)):

1074

dbus_value = transform_func(type_func(value),

1075

variant_level

1076

=variant_level)

1077

self.PropertyChanged(dbus.String(dbus_name),

1078

dbus_value)

1079

setattr(self, attrname, value)

1080

1081

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

1082

1083

1084

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1085

approvals_pending = notifychangeproperty(dbus.Boolean,

1086

"ApprovalPending",

1087

type_func = bool)

1088

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

1089

last_enabled = notifychangeproperty(datetime_to_dbus,

1090

"LastEnabled")

1091

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

1092

type_func = lambda checker:

1093

checker is not None)

1094

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1095

"LastCheckedOK")

1096

last_approval_request = notifychangeproperty(

1097

datetime_to_dbus, "LastApprovalRequest")

1098

approved_by_default = notifychangeproperty(dbus.Boolean,

1099

"ApprovedByDefault")

1100

approval_delay = notifychangeproperty(dbus.UInt64,

1101

"ApprovalDelay",

1102

type_func =

1103

timedelta_to_milliseconds)

1104

approval_duration = notifychangeproperty(

1105

dbus.UInt64, "ApprovalDuration",

1106

type_func = timedelta_to_milliseconds)

1107

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

1108

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

1109

type_func =

1110

timedelta_to_milliseconds)

1111

extended_timeout = notifychangeproperty(

1112

dbus.UInt64, "ExtendedTimeout",

1113

type_func = timedelta_to_milliseconds)

1114

interval = notifychangeproperty(dbus.UInt64,

1115

"Interval",

1116

type_func =

1117

timedelta_to_milliseconds)

1118

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

1119

1120

del notifychangeproperty

740

def _get_approvals_pending(self):

741

return self._approvals_pending

742

def _set_approvals_pending(self, value):

743

old_value = self._approvals_pending

744

self._approvals_pending = value

745

bval = bool(value)

746

if (hasattr(self, "dbus_object_path")

747

and bval is not bool(old_value)):

748

dbus_bool = dbus.Boolean(bval, variant_level=1)

749

self.PropertyChanged(dbus.String("ApprovalPending"),

750

dbus_bool)

751

752

approvals_pending = property(_get_approvals_pending,

753

_set_approvals_pending)

754

del _get_approvals_pending, _set_approvals_pending

755

756

@staticmethod

757

def _datetime_to_dbus(dt, variant_level=0):

758

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

759

return dbus.String(dt.isoformat(),

760

variant_level=variant_level)

761

762

def enable(self):

763

oldstate = getattr(self, "enabled", False)

764

r = Client.enable(self)

765

if oldstate != self.enabled:

766

# Emit D-Bus signals

767

self.PropertyChanged(dbus.String("Enabled"),

768

dbus.Boolean(True, variant_level=1))

769

self.PropertyChanged(

770

dbus.String("LastEnabled"),

771

self._datetime_to_dbus(self.last_enabled,

772

variant_level=1))

773

return r

774

775

def disable(self, quiet = False):

776

oldstate = getattr(self, "enabled", False)

777

r = Client.disable(self, quiet=quiet)

778

if not quiet and oldstate != self.enabled:

779

# Emit D-Bus signal

780

self.PropertyChanged(dbus.String("Enabled"),

781

dbus.Boolean(False, variant_level=1))

782

return r

1121

783

1122

784

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

1123

785

try:

1132

794

*args, **kwargs):

1133

795

self.checker_callback_tag = None

1134

796

self.checker = None

797

# Emit D-Bus signal

798

self.PropertyChanged(dbus.String("CheckerRunning"),

799

dbus.Boolean(False, variant_level=1))

1135

800

if os.WIFEXITED(condition):

1136

801

exitstatus = os.WEXITSTATUS(condition)

1137

802

# Emit D-Bus signal

1147

812

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

1148

813

*args, **kwargs)

1149

814

815

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

816

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

817

# Emit D-Bus signal

818

self.PropertyChanged(

819

dbus.String("LastCheckedOK"),

820

(self._datetime_to_dbus(self.last_checked_ok,

821

variant_level=1)))

822

return r

823

824

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

825

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

826

# Emit D-Bus signal

827

self.PropertyChanged(

828

dbus.String("LastApprovalRequest"),

829

(self._datetime_to_dbus(self.last_approval_request,

830

variant_level=1)))

831

return r

832

1150

833

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

1151

834

old_checker = self.checker

1152

835

if self.checker is not None:

1159

842

and old_checker_pid != self.checker.pid):

1160

843

# Emit D-Bus signal

1161

844

self.CheckerStarted(self.current_checker_command)

845

self.PropertyChanged(

846

dbus.String("CheckerRunning"),

847

dbus.Boolean(True, variant_level=1))

1162

848

return r

1163

849

850

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

851

old_checker = getattr(self, "checker", None)

852

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

853

if (old_checker is not None

854

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

855

self.PropertyChanged(dbus.String("CheckerRunning"),

856

dbus.Boolean(False, variant_level=1))

857

return r

858

1164

859

def _reset_approved(self):

1165

self.approved = None

860

self._approved = None

1166

861

return False

1167

862

1168

863

def approve(self, value=True):

1169

864

self.send_changedstate()

1170

self.approved = value

1171

gobject.timeout_add(timedelta_to_milliseconds

865

self._approved = value

866

gobject.timeout_add(self._timedelta_to_milliseconds

1172

867

(self.approval_duration),

1173

868

self._reset_approved)

1174

869

1175

870

1176

871

## D-Bus methods, signals & properties

1177

_interface = "se.recompile.Mandos.Client"

872

_interface = "se.bsnet.fukt.Mandos.Client"

1178

873

1179

874

## Signals

1180

875

1217

912

"D-Bus signal"

1218

913

return self.need_approval()

1219

914

1220

# NeRwequest - signal

1221

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

1222

def NewRequest(self, ip):

1223

"""D-Bus signal

1224

Is sent after a client request a password.

1225

"""

1226

pass

1227

1228

915

## Methods

1229

916

1230

917

# Approve - method

1235

922

# CheckedOK - method

1236

923

@dbus.service.method(_interface)

1237

924

def CheckedOK(self):

1238

self.checked_ok()

925

return self.checked_ok()

1239

926

1240

927

# Enable - method

1241

928

@dbus.service.method(_interface)

1274

961

if value is None: # get

1275

962

return dbus.Boolean(self.approved_by_default)

1276

963

self.approved_by_default = bool(value)

964

# Emit D-Bus signal

965

self.PropertyChanged(dbus.String("ApprovedByDefault"),

966

dbus.Boolean(value, variant_level=1))

1277

967

1278

968

# ApprovalDelay - property

1279

969

@dbus_service_property(_interface, signature="t",

1282

972

if value is None: # get

1283

973

return dbus.UInt64(self.approval_delay_milliseconds())

1284

974

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

975

# Emit D-Bus signal

976

self.PropertyChanged(dbus.String("ApprovalDelay"),

977

dbus.UInt64(value, variant_level=1))

1285

978

1286

979

# ApprovalDuration - property

1287

980

@dbus_service_property(_interface, signature="t",

1288

981

access="readwrite")

1289

982

def ApprovalDuration_dbus_property(self, value=None):

1290

983

if value is None: # get

1291

return dbus.UInt64(timedelta_to_milliseconds(

984

return dbus.UInt64(self._timedelta_to_milliseconds(

1292

985

self.approval_duration))

1293

986

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

987

# Emit D-Bus signal

988

self.PropertyChanged(dbus.String("ApprovalDuration"),

989

dbus.UInt64(value, variant_level=1))

1294

990

1295

991

# Name - property

1296

992

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

1308

1004

def Host_dbus_property(self, value=None):

1309

1005

if value is None: # get

1310

1006

return dbus.String(self.host)

1311

self.host = unicode(value)

1007

self.host = value

1008

# Emit D-Bus signal

1009

self.PropertyChanged(dbus.String("Host"),

1010

dbus.String(value, variant_level=1))

1312

1011

1313

1012

# Created - property

1314

1013

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

1315

1014

def Created_dbus_property(self):

1316

return datetime_to_dbus(self.created)

1015

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

1317

1016

1318

1017

# LastEnabled - property

1319

1018

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

1320

1019

def LastEnabled_dbus_property(self):

1321

return datetime_to_dbus(self.last_enabled)

1020

if self.last_enabled is None:

1021

return dbus.String("")

1022

return dbus.String(self._datetime_to_dbus(self.last_enabled))

1322

1023

1323

1024

# Enabled - property

1324

1025

@dbus_service_property(_interface, signature="b",

1338

1039

if value is not None:

1339

1040

self.checked_ok()

1340

1041

return

1341

return datetime_to_dbus(self.last_checked_ok)

1342

1343

# Expires - property

1344

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

1345

def Expires_dbus_property(self):

1346

return datetime_to_dbus(self.expires)

1042

if self.last_checked_ok is None:

1043

return dbus.String("")

1044

return dbus.String(self._datetime_to_dbus(self

1045

.last_checked_ok))

1347

1046

1348

1047

# LastApprovalRequest - property

1349

1048

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

1350

1049

def LastApprovalRequest_dbus_property(self):

1351

return datetime_to_dbus(self.last_approval_request)

1050

if self.last_approval_request is None:

1051

return dbus.String("")

1052

return dbus.String(self.

1053

_datetime_to_dbus(self

1054

.last_approval_request))

1352

1055

1353

1056

# Timeout - property

1354

1057

@dbus_service_property(_interface, signature="t",

1357

1060

if value is None: # get

1358

1061

return dbus.UInt64(self.timeout_milliseconds())

1359

1062

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

1063

# Emit D-Bus signal

1064

self.PropertyChanged(dbus.String("Timeout"),

1065

dbus.UInt64(value, variant_level=1))

1360

1066

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

1361

1067

return

1362

1068

# Reschedule timeout

1363

1069

gobject.source_remove(self.disable_initiator_tag)

1364

1070

self.disable_initiator_tag = None

1365

self.expires = None

1366

time_to_die = timedelta_to_milliseconds((self

1367

.last_checked_ok

1368

+ self.timeout)

1369

- datetime.datetime

1370

.utcnow())

1071

time_to_die = (self.

1072

_timedelta_to_milliseconds((self

1073

.last_checked_ok

1074

+ self.timeout)

1075

- datetime.datetime

1076

.utcnow()))

1371

1077

if time_to_die <= 0:

1372

1078

# The timeout has passed

1373

1079

self.disable()

1374

1080

else:

1375

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

1376

+ datetime.timedelta(milliseconds =

1377

time_to_die))

1378

1081

self.disable_initiator_tag = (gobject.timeout_add

1379

1082

(time_to_die, self.disable))

1380

1083

1381

# ExtendedTimeout - property

1382

@dbus_service_property(_interface, signature="t",

1383

access="readwrite")

1384

def ExtendedTimeout_dbus_property(self, value=None):

1385

if value is None: # get

1386

return dbus.UInt64(self.extended_timeout_milliseconds())

1387

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

1388

1389

1084

# Interval - property

1390

1085

@dbus_service_property(_interface, signature="t",

1391

1086

access="readwrite")

1393

1088

if value is None: # get

1394

1089

return dbus.UInt64(self.interval_milliseconds())

1395

1090

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

1091

# Emit D-Bus signal

1092

self.PropertyChanged(dbus.String("Interval"),

1093

dbus.UInt64(value, variant_level=1))

1396

1094

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

1397

1095

return

1398

if self.enabled:

1399

# Reschedule checker run

1400

gobject.source_remove(self.checker_initiator_tag)

1401

self.checker_initiator_tag = (gobject.timeout_add

1402

(value, self.start_checker))

1403

self.start_checker() # Start one now, too

1404

1096

# Reschedule checker run

1097

gobject.source_remove(self.checker_initiator_tag)

1098

self.checker_initiator_tag = (gobject.timeout_add

1099

(value, self.start_checker))

1100

self.start_checker() # Start one now, too

1101

1405

1102

# Checker - property

1406

1103

@dbus_service_property(_interface, signature="s",

1407

1104

access="readwrite")

1408

1105

def Checker_dbus_property(self, value=None):

1409

1106

if value is None: # get

1410

1107

return dbus.String(self.checker_command)

1411

self.checker_command = unicode(value)

1108

self.checker_command = value

1109

# Emit D-Bus signal

1110

self.PropertyChanged(dbus.String("Checker"),

1111

dbus.String(self.checker_command,

1112

variant_level=1))

1412

1113

1413

1114

# CheckerRunning - property

1414

1115

@dbus_service_property(_interface, signature="b",

1441

1142

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

1442

1143

if not self._pipe.recv():

1443

1144

raise KeyError()

1444

1145

1445

1146

def __getattribute__(self, name):

1446

if name == '_pipe':

1147

if(name == '_pipe'):

1447

1148

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

1448

1149

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

1449

1150

data = self._pipe.recv()

1454

1155

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

1455

1156

return self._pipe.recv()[1]

1456

1157

return func

1457

1158

1458

1159

def __setattr__(self, name, value):

1459

if name == '_pipe':

1160

if(name == '_pipe'):

1460

1161

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

1461

1162

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

1462

1163

1463

1164

1464

class ClientDBusTransitional(ClientDBus):

1465

__metaclass__ = AlternateDBusNamesMetaclass

1466

1467

1468

1165

class ClientHandler(socketserver.BaseRequestHandler, object):

1469

1166

"""A class to handle client connections.

1470

1167

1477

1174

unicode(self.client_address))

1478

1175

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

1479

1176

self.server.child_pipe.fileno())

1480

1177

1481

1178

session = (gnutls.connection

1482

1179

.ClientSession(self.request,

1483

1180

gnutls.connection

1484

1181

.X509Credentials()))

1485

1182

1486

1183

# Note: gnutls.connection.X509Credentials is really a

1487

1184

# generic GnuTLS certificate credentials object so long as

1488

1185

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

1489

1186

# here despite using OpenPGP certificates.

1490

1187

1491

1188

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

1492

1189

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

1493

1190

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

1499

1196

(gnutls.library.functions

1500

1197

.gnutls_priority_set_direct(session._c_object,

1501

1198

priority, None))

1502

1199

1503

1200

# Start communication using the Mandos protocol

1504

1201

# Get protocol number

1505

1202

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

1507

1204

try:

1508

1205

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

1509

1206

raise RuntimeError

1510

except (ValueError, IndexError, RuntimeError) as error:

1207

except (ValueError, IndexError, RuntimeError), error:

1511

1208

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

1512

1209

return

1513

1210

1514

1211

# Start GnuTLS connection

1515

1212

try:

1516

1213

session.handshake()

1517

except gnutls.errors.GNUTLSError as error:

1214

except gnutls.errors.GNUTLSError, error:

1518

1215

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

1519

1216

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

1520

1217

# established. Just abandon the request.

1521

1218

return

1522

1219

logger.debug("Handshake succeeded")

1523

1220

1524

1221

approval_required = False

1525

1222

try:

1526

1223

try:

1527

1224

fpr = self.fingerprint(self.peer_certificate

1528

1225

(session))

1529

except (TypeError,

1530

gnutls.errors.GNUTLSError) as error:

1226

except (TypeError, gnutls.errors.GNUTLSError), error:

1531

1227

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

1532

1228

return

1533

1229

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

1534

1230

1535

1231

try:

1536

1232

client = ProxyClient(child_pipe, fpr,

1537

1233

self.client_address)

1538

1234

except KeyError:

1539

1235

return

1540

1236

1541

if self.server.use_dbus:

1542

# Emit D-Bus signal

1543

client.NewRequest(str(self.client_address))

1544

1545

1237

if client.approval_delay:

1546

1238

delay = client.approval_delay

1547

1239

client.approvals_pending += 1

1549

1241

1550

1242

while True:

1551

1243

if not client.enabled:

1552

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

1244

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

1553

1245

client.name)

1554

1246

if self.server.use_dbus:

1555

1247

# Emit D-Bus signal

1556

client.Rejected("Disabled")

1248

client.Rejected("Disabled")

1557

1249

return

1558

1250

1559

if client.approved or not client.approval_delay:

1251

if client._approved or not client.approval_delay:

1560

1252

#We are approved or approval is disabled

1561

1253

break

1562

elif client.approved is None:

1254

elif client._approved is None:

1563

1255

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

1564

1256

client.name)

1565

1257

if self.server.use_dbus:

1576

1268

return

1577

1269

1578

1270

#wait until timeout or approved

1271

#x = float(client._timedelta_to_milliseconds(delay))

1579

1272

time = datetime.datetime.now()

1580

1273

client.changedstate.acquire()

1581

(client.changedstate.wait

1582

(float(client.timedelta_to_milliseconds(delay)

1583

/ 1000)))

1274

client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))

1584

1275

client.changedstate.release()

1585

1276

time2 = datetime.datetime.now()

1586

1277

if (time2 - time) >= delay:

1601

1292

while sent_size < len(client.secret):

1602

1293

try:

1603

1294

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

1604

except gnutls.errors.GNUTLSError as error:

1295

except (gnutls.errors.GNUTLSError), error:

1605

1296

logger.warning("gnutls send failed")

1606

1297

return

1607

1298

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

1608

1299

sent, len(client.secret)

1609

1300

- (sent_size + sent))

1610

1301

sent_size += sent

1611

1302

1612

1303

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

1613

# bump the timeout using extended_timeout

1614

client.checked_ok(client.extended_timeout)

1304

# bump the timeout as if seen

1305

client.checked_ok()

1615

1306

if self.server.use_dbus:

1616

1307

# Emit D-Bus signal

1617

1308

client.GotSecret()

1621

1312

client.approvals_pending -= 1

1622

1313

try:

1623

1314

session.bye()

1624

except gnutls.errors.GNUTLSError as error:

1315

except (gnutls.errors.GNUTLSError), error:

1625

1316

logger.warning("GnuTLS bye failed")

1626

1317

1627

1318

@staticmethod

1684

1375

# Convert the buffer to a Python bytestring

1685

1376

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

1686

1377

# Convert the bytestring to hexadecimal notation

1687

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

1378

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

1688

1379

return hex_fpr

1689

1380

1690

1381

1693

1384

def sub_process_main(self, request, address):

1694

1385

try:

1695

1386

self.finish_request(request, address)

1696

except Exception:

1387

except:

1697

1388

self.handle_error(request, address)

1698

1389

self.close_request(request)

1699

1390

1700

1391

def process_request(self, request, address):

1701

1392

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

1702

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

1703

args = (request,

1704

address))

1705

proc.start()

1706

return proc

1707

1393

multiprocessing.Process(target = self.sub_process_main,

1394

args = (request, address)).start()

1708

1395

1709

1396

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1710

1397

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

1714

1401

This function creates a new pipe in self.pipe

1715

1402

"""

1716

1403

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1717

1718

proc = MultiprocessingMixIn.process_request(self, request,

1719

client_address)

1404

1405

super(MultiprocessingMixInWithPipe,

1406

self).process_request(request, client_address)

1720

1407

self.child_pipe.close()

1721

self.add_pipe(parent_pipe, proc)

1722

1723

def add_pipe(self, parent_pipe, proc):

1408

self.add_pipe(parent_pipe)

1409

1410

def add_pipe(self, parent_pipe):

1724

1411

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

1725

1412

raise NotImplementedError

1726

1413

1727

1728

1414

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1729

1415

socketserver.TCPServer, object):

1730

1416

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

1756

1442

SO_BINDTODEVICE,

1757

1443

str(self.interface

1758

1444

+ '\0'))

1759

except socket.error as error:

1445

except socket.error, error:

1760

1446

if error[0] == errno.EPERM:

1761

1447

logger.error("No permission to"

1762

1448

" bind to interface %s",

1804

1490

self.enabled = False

1805

1491

self.clients = clients

1806

1492

if self.clients is None:

1807

self.clients = {}

1493

self.clients = set()

1808

1494

self.use_dbus = use_dbus

1809

1495

self.gnutls_priority = gnutls_priority

1810

1496

IPv6_TCPServer.__init__(self, server_address,

1814

1500

def server_activate(self):

1815

1501

if self.enabled:

1816

1502

return socketserver.TCPServer.server_activate(self)

1817

1818

1503

def enable(self):

1819

1504

self.enabled = True

1820

1821

def add_pipe(self, parent_pipe, proc):

1505

def add_pipe(self, parent_pipe):

1822

1506

# Call "handle_ipc" for both data and EOF events

1823

1507

gobject.io_add_watch(parent_pipe.fileno(),

1824

1508

gobject.IO_IN | gobject.IO_HUP,

1825

1509

functools.partial(self.handle_ipc,

1826

parent_pipe =

1827

parent_pipe,

1828

proc = proc))

1829

1510

parent_pipe = parent_pipe))

1511

1830

1512

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

1831

proc = None, client_object=None):

1513

client_object=None):

1832

1514

condition_names = {

1833

1515

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

1834

1516

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

1843

1525

for cond, name in

1844

1526

condition_names.iteritems()

1845

1527

if cond & condition)

1846

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

1528

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

1847

1529

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

1848

# Wait for other process to exit

1849

proc.join()

1850

1530

return False

1851

1531

1852

1532

# Read a request from the child

1857

1537

fpr = request[1]

1858

1538

address = request[2]

1859

1539

1860

for c in self.clients.itervalues():

1540

for c in self.clients:

1861

1541

if c.fingerprint == fpr:

1862

1542

client = c

1863

1543

break

1864

1544

else:

1865

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

1866

"dress: %s", fpr, address)

1545

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

1546

"dress: %s", fpr, address)

1867

1547

if self.use_dbus:

1868

1548

# Emit D-Bus signal

1869

mandos_dbus_service.ClientNotFound(fpr,

1870

address[0])

1549

mandos_dbus_service.ClientNotFound(fpr, address[0])

1871

1550

parent_pipe.send(False)

1872

1551

return False

1873

1552

1874

1553

gobject.io_add_watch(parent_pipe.fileno(),

1875

1554

gobject.IO_IN | gobject.IO_HUP,

1876

1555

functools.partial(self.handle_ipc,

1877

parent_pipe =

1878

parent_pipe,

1879

proc = proc,

1880

client_object =

1881

client))

1556

parent_pipe = parent_pipe,

1557

client_object = client))

1882

1558

parent_pipe.send(True)

1883

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

1884

# same fileno

1559

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

1885

1560

return False

1886

1561

if command == 'funcall':

1887

1562

funcname = request[1]

1888

1563

args = request[2]

1889

1564

kwargs = request[3]

1890

1565

1891

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

1892

funcname)(*args,

1893

**kwargs)))

1894

1566

parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))

1567

1895

1568

if command == 'getattr':

1896

1569

attrname = request[1]

1897

1570

if callable(client_object.__getattribute__(attrname)):

1898

1571

parent_pipe.send(('function',))

1899

1572

else:

1900

parent_pipe.send(('data', client_object

1901

.__getattribute__(attrname)))

1573

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

1902

1574

1903

1575

if command == 'setattr':

1904

1576

attrname = request[1]

1905

1577

value = request[2]

1906

1578

setattr(client_object, attrname, value)

1907

1579

1908

1580

return True

1909

1581

1910

1582

1941

1613

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

1942

1614

else:

1943

1615

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

1944

except (ValueError, IndexError) as e:

1616

except (ValueError, IndexError), e:

1945

1617

raise ValueError(*(e.args))

1946

1618

timevalue += delta

1947

1619

return timevalue

1948

1620

1949

1621

1622

def if_nametoindex(interface):

1623

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

1624

1625

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

1626

global if_nametoindex

1627

try:

1628

if_nametoindex = (ctypes.cdll.LoadLibrary

1629

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

1630

.if_nametoindex)

1631

except (OSError, AttributeError):

1632

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

1633

def if_nametoindex(interface):

1634

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

1635

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

1636

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

1637

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1638

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

1639

interface))

1640

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

1641

ifreq[16:20])[0]

1642

return interface_index

1643

return if_nametoindex(interface)

1644

1645

1950

1646

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

1951

1647

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

1952

1648

1977

1673

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

1978

1674

# Parsing of options, both command line and config file

1979

1675

1980

parser = argparse.ArgumentParser()

1981

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

1982

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

1983

help="show version number and exit")

1984

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

1985

help="Bind to interface IF")

1986

parser.add_argument("-a", "--address",

1987

help="Address to listen for requests on")

1988

parser.add_argument("-p", "--port", type=int,

1989

help="Port number to receive requests on")

1990

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

1991

help="Run self-test")

1992

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

1993

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

1994

" to terminal")

1995

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

1996

help="Debug level for stdout output")

1997

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

1998

" priority string (see GnuTLS documentation)")

1999

parser.add_argument("--servicename",

2000

metavar="NAME", help="Zeroconf service name")

2001

parser.add_argument("--configdir",

2002

default="/etc/mandos", metavar="DIR",

2003

help="Directory to search for configuration"

2004

" files")

2005

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

2006

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

2007

" system bus interface")

2008

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

2009

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

2010

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

2011

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

2012

" state")

2013

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

2014

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

2015

2016

options = parser.parse_args()

1676

parser = optparse.OptionParser(version = "%%prog %s" % version)

1677

parser.add_option("-i", "--interface", type="string",

1678

metavar="IF", help="Bind to interface IF")

1679

parser.add_option("-a", "--address", type="string",

1680

help="Address to listen for requests on")

1681

parser.add_option("-p", "--port", type="int",

1682

help="Port number to receive requests on")

1683

parser.add_option("--check", action="store_true",

1684

help="Run self-test")

1685

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

1686

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

1687

" terminal")

1688

parser.add_option("--debuglevel", type="string", metavar="LEVEL",

1689

help="Debug level for stdout output")

1690

parser.add_option("--priority", type="string", help="GnuTLS"

1691

" priority string (see GnuTLS documentation)")

1692

parser.add_option("--servicename", type="string",

1693

metavar="NAME", help="Zeroconf service name")

1694

parser.add_option("--configdir", type="string",

1695

default="/etc/mandos", metavar="DIR",

1696

help="Directory to search for configuration"

1697

" files")

1698

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

1699

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

1700

" system bus interface")

1701

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

1702

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

1703

options = parser.parse_args()[0]

2017

1704

2018

1705

if options.check:

2019

1706

import doctest

2031

1718

"use_dbus": "True",

2032

1719

"use_ipv6": "True",

2033

1720

"debuglevel": "",

2034

"restore": "True",

2035

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

2036

1721

}

2037

1722

2038

1723

# Parse config file for server-global settings

2055

1740

# options, if set.

2056

1741

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

2057

1742

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

2058

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

2059

"statedir"):

1743

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

2060

1744

value = getattr(options, option)

2061

1745

if value is not None:

2062

1746

server_settings[option] = value

2074

1758

debuglevel = server_settings["debuglevel"]

2075

1759

use_dbus = server_settings["use_dbus"]

2076

1760

use_ipv6 = server_settings["use_ipv6"]

2077

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

2078

stored_state_file)

2079

2080

if debug:

2081

initlogger(logging.DEBUG)

2082

else:

2083

if not debuglevel:

2084

initlogger()

2085

else:

2086

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

2087

initlogger(level)

2088

1761

2089

1762

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

2090

1763

syslogger.setFormatter(logging.Formatter

2091

1764

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

2093

1766

% server_settings["servicename"]))

2094

1767

2095

1768

# Parse config file with clients

2096

client_config = configparser.SafeConfigParser(Client.client_defaults)

1769

client_defaults = { "timeout": "1h",

1770

"interval": "5m",

1771

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

1772

"host": "",

1773

"approval_delay": "0s",

1774

"approval_duration": "1s",

1775

}

1776

client_config = configparser.SafeConfigParser(client_defaults)

2097

1777

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

2098

1778

"clients.conf"))

2099

1779

2133

1813

try:

2134

1814

os.setgid(gid)

2135

1815

os.setuid(uid)

2136

except OSError as error:

1816

except OSError, error:

2137

1817

if error[0] != errno.EPERM:

2138

1818

raise error

2139

1819

1820

if not debug and not debuglevel:

1821

syslogger.setLevel(logging.WARNING)

1822

console.setLevel(logging.WARNING)

1823

if debuglevel:

1824

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

1825

syslogger.setLevel(level)

1826

console.setLevel(level)

1827

2140

1828

if debug:

2141

1829

# Enable all possible GnuTLS debugging

2142

1830

2173

1861

# End of Avahi example code

2174

1862

if use_dbus:

2175

1863

try:

2176

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

1864

bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",

2177

1865

bus, do_not_queue=True)

2178

old_bus_name = (dbus.service.BusName

2179

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

2180

do_not_queue=True))

2181

except dbus.exceptions.NameExistsException as e:

1866

except dbus.exceptions.NameExistsException, e:

2182

1867

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

2183

1868

use_dbus = False

2184

1869

server_settings["use_dbus"] = False

2185

1870

tcp_server.use_dbus = False

2186

1871

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2187

service = AvahiServiceToSyslog(name =

2188

server_settings["servicename"],

2189

servicetype = "_mandos._tcp",

2190

protocol = protocol, bus = bus)

1872

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

1873

servicetype = "_mandos._tcp",

1874

protocol = protocol, bus = bus)

2191

1875

if server_settings["interface"]:

2192

1876

service.interface = (if_nametoindex

2193

1877

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

2197

1881

2198

1882

client_class = Client

2199

1883

if use_dbus:

2200

client_class = functools.partial(ClientDBusTransitional,

2201

bus = bus)

2202

2203

client_settings = Client.config_parser(client_config)

2204

old_client_settings = {}

2205

clients_data = {}

2206

2207

# Get client data and settings from last running state.

2208

if server_settings["restore"]:

2209

try:

2210

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

2211

clients_data, old_client_settings = (pickle.load

2212

(stored_state))

2213

os.remove(stored_state_path)

2214

except IOError as e:

2215

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

2216

.format(e))

2217

if e.errno != errno.ENOENT:

2218

raise

2219

2220

with PGPEngine() as pgp:

2221

for client_name, client in clients_data.iteritems():

2222

# Decide which value to use after restoring saved state.

2223

# We have three different values: Old config file,

2224

# new config file, and saved state.

2225

# New config value takes precedence if it differs from old

2226

# config value, otherwise use saved state.

2227

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

2228

try:

2229

# For each value in new config, check if it

2230

# differs from the old config value (Except for

2231

# the "secret" attribute)

2232

if (name != "secret" and

2233

value != old_client_settings[client_name]

2234

[name]):

2235

client[name] = value

2236

except KeyError:

2237

pass

2238

2239

# Clients who has passed its expire date can still be

2240

# enabled if its last checker was successful. Clients

2241

# whose checker failed before we stored its state is

2242

# assumed to have failed all checkers during downtime.

2243

if client["enabled"]:

2244

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

2245

if not client["last_checked_ok"]:

2246

logger.warning(

2247

"disabling client {0} - Client never "

2248

"performed a successfull checker"

2249

.format(client["name"]))

2250

client["enabled"] = False

2251

elif client["last_checker_status"] != 0:

2252

logger.warning(

2253

"disabling client {0} - Client "

2254

"last checker failed with error code {1}"

2255

.format(client["name"],

2256

client["last_checker_status"]))

2257

client["enabled"] = False

2258

else:

2259

client["expires"] = (datetime.datetime

2260

.utcnow()

2261

+ client["timeout"])

2262

1884

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

1885

def client_config_items(config, section):

1886

special_settings = {

1887

"approved_by_default":

1888

lambda: config.getboolean(section,

1889

"approved_by_default"),

1890

}

1891

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

2263

1892

try:

2264

client["secret"] = (

2265

pgp.decrypt(client["encrypted_secret"],

2266

client_settings[client_name]

2267

["secret"]))

2268

except PGPError:

2269

# If decryption fails, we use secret from new settings

2270

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

2271

.format(client_name))

2272

client["secret"] = (

2273

client_settings[client_name]["secret"])

2274

2275

2276

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

2277

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

2278

del clients_data[client_name]

2279

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

2280

clients_data[client_name] = client_settings[client_name]

2281

2282

# Create clients all clients

2283

for client_name, client in clients_data.iteritems():

2284

tcp_server.clients[client_name] = client_class(

2285

name = client_name, settings = client)

2286

1893

yield (name, special_settings[name]())

1894

except KeyError:

1895

yield (name, value)

1896

1897

tcp_server.clients.update(set(

1898

client_class(name = section,

1899

config= dict(client_config_items(

1900

client_config, section)))

1901

for section in client_config.sections()))

2287

1902

if not tcp_server.clients:

2288

1903

logger.warning("No clients defined")

2289

1904

2300

1915

# "pidfile" was never created

2301

1916

pass

2302

1917

del pidfilename

1918

2303

1919

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

2304

1920

2305

1921

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

2306

1922

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

2307

1923

2310

1926

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

2311

1927

def __init__(self):

2312

1928

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

2313

_interface = "se.recompile.Mandos"

1929

_interface = "se.bsnet.fukt.Mandos"

2314

1930

2315

1931

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

2316

1932

def ClientAdded(self, objpath):

2331

1947

def GetAllClients(self):

2332

1948

"D-Bus method"

2333

1949

return dbus.Array(c.dbus_object_path

2334

for c in

2335

tcp_server.clients.itervalues())

1950

for c in tcp_server.clients)

2336

1951

2337

1952

@dbus.service.method(_interface,

2338

1953

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

2340

1955

"D-Bus method"

2341

1956

return dbus.Dictionary(

2342

1957

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

2343

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

1958

for c in tcp_server.clients),

2344

1959

signature="oa{sv}")

2345

1960

2346

1961

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

2347

1962

def RemoveClient(self, object_path):

2348

1963

"D-Bus method"

2349

for c in tcp_server.clients.itervalues():

1964

for c in tcp_server.clients:

2350

1965

if c.dbus_object_path == object_path:

2351

del tcp_server.clients[c.name]

1966

tcp_server.clients.remove(c)

2352

1967

c.remove_from_connection()

2353

1968

# Don't signal anything except ClientRemoved

2354

1969

c.disable(quiet=True)

2359

1974

2360

1975

del _interface

2361

1976

2362

class MandosDBusServiceTransitional(MandosDBusService):

2363

__metaclass__ = AlternateDBusNamesMetaclass

2364

mandos_dbus_service = MandosDBusServiceTransitional()

1977

mandos_dbus_service = MandosDBusService()

2365

1978

2366

1979

def cleanup():

2367

1980

"Cleanup function; run on exit"

2368

1981

service.cleanup()

2369

1982

2370

multiprocessing.active_children()

2371

if not (tcp_server.clients or client_settings):

2372

return

2373

2374

# Store client before exiting. Secrets are encrypted with key

2375

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

2376

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

2377

clients = {}

2378

with PGPEngine() as pgp:

2379

for client in tcp_server.clients.itervalues():

2380

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

2381

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

2382

key)

2383

client_dict = {}

2384

2385

# A list of attributes that can not be pickled

2386

# + secret.

2387

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

2388

"checker"))

2389

for name, typ in (inspect.getmembers

2390

(dbus.service.Object)):

2391

exclude.add(name)

2392

2393

client_dict["encrypted_secret"] = (client

2394

.encrypted_secret)

2395

for attr in client.client_structure:

2396

if attr not in exclude:

2397

client_dict[attr] = getattr(client, attr)

2398

2399

clients[client.name] = client_dict

2400

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

2401

2402

try:

2403

with os.fdopen(os.open(stored_state_path,

2404

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

2405

0600), "wb") as stored_state:

2406

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

2407

except (IOError, OSError) as e:

2408

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

2409

.format(e))

2410

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

2411

raise

2412

2413

# Delete all clients, and settings from config

2414

1983

while tcp_server.clients:

2415

name, client = tcp_server.clients.popitem()

1984

client = tcp_server.clients.pop()

2416

1985

if use_dbus:

2417

1986

client.remove_from_connection()

1987

client.disable_hook = None

2418

1988

# Don't signal anything except ClientRemoved

2419

1989

client.disable(quiet=True)

2420

1990

if use_dbus:

2421

1991

# Emit D-Bus signal

2422

mandos_dbus_service.ClientRemoved(client

2423

.dbus_object_path,

1992

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2424

1993

client.name)

2425

client_settings.clear()

2426

1994

2427

1995

atexit.register(cleanup)

2428

1996

2429

for client in tcp_server.clients.itervalues():

1997

for client in tcp_server.clients:

2430

1998

if use_dbus:

2431

1999

# Emit D-Bus signal

2432

2000

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2433

# Need to initiate checking of clients

2434

if client.enabled:

2435

client.init_checker()

2001

client.enable()

2436

2002

2437

2003

tcp_server.enable()

2438

2004

tcp_server.server_activate()

2453

2019

# From the Avahi example code

2454

2020

try:

2455

2021

service.activate()

2456

except dbus.exceptions.DBusException as error:

2022

except dbus.exceptions.DBusException, error:

2457

2023

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

2458

2024

cleanup()

2459

2025

sys.exit(1)

2466

2032

2467

2033

logger.debug("Starting main loop")

2468

2034

main_loop.run()

2469

except AvahiError as error:

2035

except AvahiError, error:

2470

2036

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

2471

2037

cleanup()

2472

2038

sys.exit(1)