/mandos/trunk : revision 482

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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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# 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 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 itertools

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import dbus

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import dbus.service

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import ctypes.util

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import xml.dom.minidom

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import inspect

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import GnuPGInterface

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.5.3"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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version = "1.3.0"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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

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"""init logger and add loglevel"""

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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

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pass

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class PGPEngine(object):

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

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def __init__(self):

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self.gnupg = GnuPGInterface.GnuPG()

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

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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

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'--quiet',

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'--no-use-agent'])

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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def encrypt(self, data, password):

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

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

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return ciphertext

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def decrypt(self, data, password):

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

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

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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decrypted_plaintext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return decrypted_plaintext

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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class AvahiError(Exception):

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

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" 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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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.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) as e:

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pass

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self.group = None

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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.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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follow_name_owner_changes=True),

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self.entry_group_state_changed))

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'StateChanged', self .entry_group_state_changed))

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

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self.name, self.type)

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self.group.AddService(

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% unicode(error))

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def cleanup(self):

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

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if self.group is not None:

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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException):

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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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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 bad_states[state]:

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logger.error(bad_states[state])

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

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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 (%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, -2 means no checker completed yet.

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

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last_enabled: datetime.datetime(); (UTC)

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

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D-Bus identifiers

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

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

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until this client is disabled

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extended_timeout: extra long timeout when secret has been sent

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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)

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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"

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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):

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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")

486

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:

492

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

493

% 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):

316

return self._timedelta_to_milliseconds(self.approval_delay)

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def __init__(self, name = None, disable_hook=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'

513

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attribute."""

514

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self.name = name

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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:

520

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"):

523

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()

532

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# function

329

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

330

.replace(" ", ""))

533

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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

332

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

336

(config["secfile"])),

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"rb") as secfile:

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self.secret = secfile.read()

339

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", "")

343

self.created = datetime.datetime.utcnow()

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self.enabled = False

345

self.last_approval_request = None

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self.last_enabled = None

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self.last_checked_ok = None

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

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

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self.disable_hook = disable_hook

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self.checker = None

539

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self.checker_initiator_tag = None

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self.disable_initiator_tag = 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

543

self.approved = None

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self.last_connect = None

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self._approved = None

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

360

True)

544

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self.approvals_pending = 0

545

self.changedstate = (multiprocessing_manager

546

.Condition(multiprocessing_manager

547

.Lock()))

548

self.client_structure = [attr for attr in

549

self.__dict__.iterkeys()

550

if not attr.startswith("_")]

551

self.client_structure.append("client_structure")

552

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

554

lambda obj:

555

isinstance(obj,

556

property)):

557

if not name.startswith("_"):

558

self.client_structure.append(name)

362

self.approval_delay = string_to_delta(

363

config["approval_delay"])

364

self.approval_duration = string_to_delta(

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config["approval_duration"])

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

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# Send notice to process children that client state has changed

561

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def send_changedstate(self):

562

with self.changedstate:

563

self.changedstate.notify_all()

564

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self.changedstate.acquire()

370

self.changedstate.notify_all()

371

self.changedstate.release()

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def enable(self):

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

567

375

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

568

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# Already enabled

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return

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self.send_changedstate()

571

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

572

self.enabled = True

573

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self.last_enabled = datetime.datetime.utcnow()

574

self.init_checker()

380

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

381

# and every interval from then on.

382

self.checker_initiator_tag = (gobject.timeout_add

383

(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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self.disable_initiator_tag = (gobject.timeout_add

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(self.timeout_milliseconds(),

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self.disable))

389

self.enabled = True

390

# Also start a new checker *right now*.

391

self.start_checker()

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def disable(self, quiet=True):

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"""Disable this client."""

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401

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", False):

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gobject.source_remove(self.checker_initiator_tag)

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406

self.checker_initiator_tag = None

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407

self.stop_checker()

408

if self.disable_hook:

409

self.disable_hook(self)

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self.enabled = False

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411

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

594

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return False

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def __del__(self):

415

self.disable_hook = None

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self.disable()

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417

599

def init_checker(self):

600

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

601

# and every interval from then on.

602

self.checker_initiator_tag = (gobject.timeout_add

603

(self.interval_milliseconds(),

604

self.start_checker))

605

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

606

self.disable_initiator_tag = (gobject.timeout_add

607

(self.timeout_milliseconds(),

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self.disable))

609

# Also start a new checker *right now*.

610

self.start_checker()

611

612

418

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

613

419

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

614

420

self.checker_callback_tag = None

615

421

self.checker = None

616

422

if os.WIFEXITED(condition):

617

self.last_checker_status = os.WEXITSTATUS(condition)

618

if self.last_checker_status == 0:

423

exitstatus = os.WEXITSTATUS(condition)

424

if exitstatus == 0:

619

425

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

620

426

vars(self))

621

427

self.checked_ok()

623

429

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

624

430

vars(self))

625

431

else:

626

self.last_checker_status = -1

627

432

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

628

433

vars(self))

629

434

630

435

def checked_ok(self):

631

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

436

"""Bump up the timeout for this client.

437

438

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

439

alive and well.

440

"""

632

441

self.last_checked_ok = datetime.datetime.utcnow()

633

self.last_checker_status = 0

634

self.bump_timeout()

635

636

def bump_timeout(self, timeout=None):

637

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

638

if timeout is None:

639

timeout = self.timeout

640

if self.disable_initiator_tag is not None:

641

gobject.source_remove(self.disable_initiator_tag)

642

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

643

self.disable_initiator_tag = (gobject.timeout_add

644

(timedelta_to_milliseconds

645

(timeout), self.disable))

646

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

442

gobject.source_remove(self.disable_initiator_tag)

443

self.disable_initiator_tag = (gobject.timeout_add

444

(self.timeout_milliseconds(),

445

self.disable))

647

446

648

447

def need_approval(self):

649

448

self.last_approval_request = datetime.datetime.utcnow()

689

488

'replace')))

690

489

for attr in

691

490

self.runtime_expansions)

692

491

693

492

try:

694

493

command = self.checker_command % escaped_attrs

695

494

except TypeError as error:

696

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

697

self.checker_command, exc_info=error)

495

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

496

' %s', self.checker_command, error)

698

497

return True # Try again later

699

498

self.current_checker_command = command

700

499

try:

718

517

gobject.source_remove(self.checker_callback_tag)

719

518

self.checker_callback(pid, status, command)

720

519

except OSError as error:

721

logger.error("Failed to start subprocess",

722

exc_info=error)

520

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

521

error)

723

522

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

724

523

return True

725

524

732

531

return

733

532

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

734

533

try:

735

self.checker.terminate()

534

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

736

535

#time.sleep(0.5)

737

536

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

738

# self.checker.kill()

537

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

739

538

except OSError as error:

740

539

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

741

540

raise

742

541

self.checker = None

743

542

744

745

543

def dbus_service_property(dbus_interface, signature="v",

746

544

access="readwrite", byte_arrays=False):

747

545

"""Decorators for marking methods of a DBusObjectWithProperties to

772

570

return decorator

773

571

774

572

775

def dbus_interface_annotations(dbus_interface):

776

"""Decorator for marking functions returning interface annotations.

777

778

Usage:

779

780

@dbus_interface_annotations("org.example.Interface")

781

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

782

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

783

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

784

"false"}

785

"""

786

def decorator(func):

787

func._dbus_is_interface = True

788

func._dbus_interface = dbus_interface

789

func._dbus_name = dbus_interface

790

return func

791

return decorator

792

793

794

def dbus_annotations(annotations):

795

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

796

Usage:

797

798

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

799

access="r")

800

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

801

"org.freedesktop.DBus.Property."

802

"EmitsChangedSignal": "false"})

803

def Property_dbus_property(self):

804

return dbus.Boolean(False)

805

"""

806

def decorator(func):

807

func._dbus_annotations = annotations

808

return func

809

return decorator

810

811

812

573

class DBusPropertyException(dbus.exceptions.DBusException):

813

574

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

814

575

"""

830

591

831

592

class DBusObjectWithProperties(dbus.service.Object):

832

593

"""A D-Bus object with properties.

833

594

834

595

Classes inheriting from this can use the dbus_service_property

835

596

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

836

597

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

837

598

"""

838

599

839

600

@staticmethod

840

def _is_dbus_thing(thing):

841

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

842

843

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

844

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

845

"""

846

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

847

False)

601

def _is_dbus_property(obj):

602

return getattr(obj, "_dbus_is_property", False)

848

603

849

def _get_all_dbus_things(self, thing):

604

def _get_all_dbus_properties(self):

850

605

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

851

606

"""

852

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

853

name),

854

athing.__get__(self))

855

for cls in self.__class__.__mro__

856

for name, athing in

857

inspect.getmembers(cls,

858

self._is_dbus_thing(thing)))

607

return ((prop._dbus_name, prop)

608

for name, prop in

609

inspect.getmembers(self, self._is_dbus_property))

859

610

860

611

def _get_dbus_property(self, interface_name, property_name):

861

612

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

862

613

property with the specified name and interface.

863

614

"""

864

for cls in self.__class__.__mro__:

865

for name, value in (inspect.getmembers

866

(cls,

867

self._is_dbus_thing("property"))):

868

if (value._dbus_name == property_name

869

and value._dbus_interface == interface_name):

870

return value.__get__(self)

871

615

for name in (property_name,

616

property_name + "_dbus_property"):

617

prop = getattr(self, name, None)

618

if (prop is None

619

or not self._is_dbus_property(prop)

620

or prop._dbus_name != property_name

621

or (interface_name and prop._dbus_interface

622

and interface_name != prop._dbus_interface)):

623

continue

624

return prop

872

625

# No such property

873

626

raise DBusPropertyNotFound(self.dbus_object_path + ":"

874

627

+ interface_name + "."

899

652

# signatures other than "ay".

900

653

if prop._dbus_signature != "ay":

901

654

raise ValueError

902

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

903

for byte in value))

655

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

656

for byte in value))

904

657

prop(value)

905

658

906

659

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

908

661

def GetAll(self, interface_name):

909

662

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

910

663

standard.

911

664

912

665

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

913

666

"""

914

properties = {}

915

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

667

all = {}

668

for name, prop in self._get_all_dbus_properties():

916

669

if (interface_name

917

670

and interface_name != prop._dbus_interface):

918

671

# Interface non-empty but did not match

922

675

continue

923

676

value = prop()

924

677

if not hasattr(value, "variant_level"):

925

properties[name] = value

678

all[name] = value

926

679

continue

927

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

928

value.variant_level+1)

929

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

680

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

681

value.variant_level+1)

682

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

930

683

931

684

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

932

685

out_signature="s",

933

686

path_keyword='object_path',

934

687

connection_keyword='connection')

935

688

def Introspect(self, object_path, connection):

936

"""Overloading of standard D-Bus method.

937

938

Inserts property tags and interface annotation tags.

689

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

939

690

"""

940

691

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

941

692

connection)

948

699

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

949

700

return e

950

701

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

951

# Add property tags

952

702

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

953

703

for name, prop

954

in self._get_all_dbus_things("property")

704

in self._get_all_dbus_properties()

955

705

if prop._dbus_interface

956

706

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

957

707

if_tag.appendChild(tag)

958

# Add annotation tags

959

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

960

for tag in if_tag.getElementsByTagName(typ):

961

annots = dict()

962

for name, prop in (self.

963

_get_all_dbus_things(typ)):

964

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

965

and prop._dbus_interface

966

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

967

annots.update(getattr

968

(prop,

969

"_dbus_annotations",

970

{}))

971

for name, value in annots.iteritems():

972

ann_tag = document.createElement(

973

"annotation")

974

ann_tag.setAttribute("name", name)

975

ann_tag.setAttribute("value", value)

976

tag.appendChild(ann_tag)

977

# Add interface annotation tags

978

for annotation, value in dict(

979

itertools.chain(

980

*(annotations().iteritems()

981

for name, annotations in

982

self._get_all_dbus_things("interface")

983

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

984

))).iteritems():

985

ann_tag = document.createElement("annotation")

986

ann_tag.setAttribute("name", annotation)

987

ann_tag.setAttribute("value", value)

988

if_tag.appendChild(ann_tag)

989

708

# Add the names to the return values for the

990

709

# "org.freedesktop.DBus.Properties" methods

991

710

if (if_tag.getAttribute("name")

1006

725

except (AttributeError, xml.dom.DOMException,

1007

726

xml.parsers.expat.ExpatError) as error:

1008

727

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

1009

exc_info=error)

728

error)

1010

729

return xmlstring

1011

730

1012

731

1013

def datetime_to_dbus (dt, variant_level=0):

1014

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

1015

if dt is None:

1016

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

1017

return dbus.String(dt.isoformat(),

1018

variant_level=variant_level)

1019

1020

1021

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

1022

.__metaclass__):

1023

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

1024

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

1025

"""

1026

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

1027

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

1028

# methods, signals, or properties in them

1029

old_interface_names = []

1030

for base in (b for b in bases

1031

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

1032

# Go though all attributes of the base class

1033

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

1034

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

1035

# with the wrong interface name

1036

if (not hasattr(attribute, "_dbus_interface")

1037

or not attribute._dbus_interface

1038

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

1039

continue

1040

# Create an alternate D-Bus interface name based on

1041

# the current name

1042

alt_interface = (attribute._dbus_interface

1043

.replace("se.recompile.Mandos",

1044

"se.bsnet.fukt.Mandos"))

1045

if alt_interface != attribute._dbus_interface:

1046

old_interface_names.append(alt_interface)

1047

# Is this a D-Bus signal?

1048

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

1049

# Extract the original non-method function by

1050

# black magic

1051

nonmethod_func = (dict(

1052

zip(attribute.func_code.co_freevars,

1053

attribute.__closure__))["func"]

1054

.cell_contents)

1055

# Create a new, but exactly alike, function

1056

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

1057

# with the alternate D-Bus interface name

1058

new_function = (dbus.service.signal

1059

(alt_interface,

1060

attribute._dbus_signature)

1061

(types.FunctionType(

1062

nonmethod_func.func_code,

1063

nonmethod_func.func_globals,

1064

nonmethod_func.func_name,

1065

nonmethod_func.func_defaults,

1066

nonmethod_func.func_closure)))

1067

# Copy annotations, if any

1068

try:

1069

new_function._dbus_annotations = (

1070

dict(attribute._dbus_annotations))

1071

except AttributeError:

1072

pass

1073

# Define a creator of a function to call both the

1074

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

1075

# signals gets sent when the function is called

1076

def fixscope(func1, func2):

1077

"""This function is a scope container to pass

1078

func1 and func2 to the "call_both" function

1079

outside of its arguments"""

1080

def call_both(*args, **kwargs):

1081

"""This function will emit two D-Bus

1082

signals by calling func1 and func2"""

1083

func1(*args, **kwargs)

1084

func2(*args, **kwargs)

1085

return call_both

1086

# Create the "call_both" function and add it to

1087

# the class

1088

attr[attrname] = fixscope(attribute,

1089

new_function)

1090

# Is this a D-Bus method?

1091

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

1092

# Create a new, but exactly alike, function

1093

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

1094

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

1095

# to the class.

1096

attr[attrname] = (dbus.service.method

1097

(alt_interface,

1098

attribute._dbus_in_signature,

1099

attribute._dbus_out_signature)

1100

(types.FunctionType

1101

(attribute.func_code,

1102

attribute.func_globals,

1103

attribute.func_name,

1104

attribute.func_defaults,

1105

attribute.func_closure)))

1106

# Copy annotations, if any

1107

try:

1108

attr[attrname]._dbus_annotations = (

1109

dict(attribute._dbus_annotations))

1110

except AttributeError:

1111

pass

1112

# Is this a D-Bus property?

1113

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

1114

# Create a new, but exactly alike, function

1115

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

1116

# property with the alternate D-Bus interface

1117

# name. Add it to the class.

1118

attr[attrname] = (dbus_service_property

1119

(alt_interface,

1120

attribute._dbus_signature,

1121

attribute._dbus_access,

1122

attribute

1123

._dbus_get_args_options

1124

["byte_arrays"])

1125

(types.FunctionType

1126

(attribute.func_code,

1127

attribute.func_globals,

1128

attribute.func_name,

1129

attribute.func_defaults,

1130

attribute.func_closure)))

1131

# Copy annotations, if any

1132

try:

1133

attr[attrname]._dbus_annotations = (

1134

dict(attribute._dbus_annotations))

1135

except AttributeError:

1136

pass

1137

# Is this a D-Bus interface?

1138

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

1139

# Create a new, but exactly alike, function

1140

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

1141

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

1142

# to the class.

1143

attr[attrname] = (dbus_interface_annotations

1144

(alt_interface)

1145

(types.FunctionType

1146

(attribute.func_code,

1147

attribute.func_globals,

1148

attribute.func_name,

1149

attribute.func_defaults,

1150

attribute.func_closure)))

1151

# Deprecate all old interfaces

1152

basename="_AlternateDBusNamesMetaclass_interface_annotation{0}"

1153

for old_interface_name in old_interface_names:

1154

@dbus_interface_annotations(old_interface_name)

1155

def func(self):

1156

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

1157

# Find an unused name

1158

for aname in (basename.format(i) for i in

1159

itertools.count()):

1160

if aname not in attr:

1161

attr[aname] = func

1162

break

1163

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

1164

1165

1166

732

class ClientDBus(Client, DBusObjectWithProperties):

1167

733

"""A Client class using D-Bus

1168

734

1177

743

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

1178

744

1179

745

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

746

self._approvals_pending = 0

1180

747

self.bus = bus

1181

748

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

1182

749

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

1189

756

DBusObjectWithProperties.__init__(self, self.bus,

1190

757

self.dbus_object_path)

1191

758

1192

def notifychangeproperty(transform_func,

1193

dbus_name, type_func=lambda x: x,

1194

variant_level=1):

1195

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

1196

its changes to DBus.

1197

1198

transform_fun: Function that takes a value and a variant_level

1199

and transforms it to a D-Bus type.

1200

dbus_name: D-Bus name of the variable

1201

type_func: Function that transform the value before sending it

1202

to the D-Bus. Default: no transform

1203

variant_level: D-Bus variant level. Default: 1

1204

"""

1205

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

1206

def setter(self, value):

1207

if hasattr(self, "dbus_object_path"):

1208

if (not hasattr(self, attrname) or

1209

type_func(getattr(self, attrname, None))

1210

!= type_func(value)):

1211

dbus_value = transform_func(type_func(value),

1212

variant_level

1213

=variant_level)

1214

self.PropertyChanged(dbus.String(dbus_name),

1215

dbus_value)

1216

setattr(self, attrname, value)

1217

1218

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

1219

1220

1221

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1222

approvals_pending = notifychangeproperty(dbus.Boolean,

1223

"ApprovalPending",

1224

type_func = bool)

1225

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

1226

last_enabled = notifychangeproperty(datetime_to_dbus,

1227

"LastEnabled")

1228

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

1229

type_func = lambda checker:

1230

checker is not None)

1231

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1232

"LastCheckedOK")

1233

last_checker_status = notifychangeproperty(dbus.Int16,

1234

"LastCheckerStatus")

1235

last_approval_request = notifychangeproperty(

1236

datetime_to_dbus, "LastApprovalRequest")

1237

approved_by_default = notifychangeproperty(dbus.Boolean,

1238

"ApprovedByDefault")

1239

approval_delay = notifychangeproperty(dbus.UInt64,

1240

"ApprovalDelay",

1241

type_func =

1242

timedelta_to_milliseconds)

1243

approval_duration = notifychangeproperty(

1244

dbus.UInt64, "ApprovalDuration",

1245

type_func = timedelta_to_milliseconds)

1246

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

1247

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

1248

type_func =

1249

timedelta_to_milliseconds)

1250

extended_timeout = notifychangeproperty(

1251

dbus.UInt64, "ExtendedTimeout",

1252

type_func = timedelta_to_milliseconds)

1253

interval = notifychangeproperty(dbus.UInt64,

1254

"Interval",

1255

type_func =

1256

timedelta_to_milliseconds)

1257

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

1258

1259

del notifychangeproperty

759

def _get_approvals_pending(self):

760

return self._approvals_pending

761

def _set_approvals_pending(self, value):

762

old_value = self._approvals_pending

763

self._approvals_pending = value

764

bval = bool(value)

765

if (hasattr(self, "dbus_object_path")

766

and bval is not bool(old_value)):

767

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

768

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

769

dbus_bool)

770

771

approvals_pending = property(_get_approvals_pending,

772

_set_approvals_pending)

773

del _get_approvals_pending, _set_approvals_pending

774

775

@staticmethod

776

def _datetime_to_dbus(dt, variant_level=0):

777

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

778

return dbus.String(dt.isoformat(),

779

variant_level=variant_level)

780

781

def enable(self):

782

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

783

r = Client.enable(self)

784

if oldstate != self.enabled:

785

# Emit D-Bus signals

786

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

787

dbus.Boolean(True, variant_level=1))

788

self.PropertyChanged(

789

dbus.String("LastEnabled"),

790

self._datetime_to_dbus(self.last_enabled,

791

variant_level=1))

792

return r

793

794

def disable(self, quiet = False):

795

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

796

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

797

if not quiet and oldstate != self.enabled:

798

# Emit D-Bus signal

799

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

800

dbus.Boolean(False, variant_level=1))

801

return r

1260

802

1261

803

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

1262

804

try:

1271

813

*args, **kwargs):

1272

814

self.checker_callback_tag = None

1273

815

self.checker = None

816

# Emit D-Bus signal

817

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

818

dbus.Boolean(False, variant_level=1))

1274

819

if os.WIFEXITED(condition):

1275

820

exitstatus = os.WEXITSTATUS(condition)

1276

821

# Emit D-Bus signal

1286

831

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

1287

832

*args, **kwargs)

1288

833

834

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

835

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

836

# Emit D-Bus signal

837

self.PropertyChanged(

838

dbus.String("LastCheckedOK"),

839

(self._datetime_to_dbus(self.last_checked_ok,

840

variant_level=1)))

841

842

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

843

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

844

# Emit D-Bus signal

845

self.PropertyChanged(

846

dbus.String("LastApprovalRequest"),

847

(self._datetime_to_dbus(self.last_approval_request,

848

variant_level=1)))

849

return r

850

1289

851

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

1290

852

old_checker = self.checker

1291

853

if self.checker is not None:

1298

860

and old_checker_pid != self.checker.pid):

1299

861

# Emit D-Bus signal

1300

862

self.CheckerStarted(self.current_checker_command)

863

self.PropertyChanged(

864

dbus.String("CheckerRunning"),

865

dbus.Boolean(True, variant_level=1))

1301

866

return r

1302

867

868

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

869

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

870

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

871

if (old_checker is not None

872

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

873

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

874

dbus.Boolean(False, variant_level=1))

875

return r

876

1303

877

def _reset_approved(self):

1304

self.approved = None

878

self._approved = None

1305

879

return False

1306

880

1307

881

def approve(self, value=True):

1308

882

self.send_changedstate()

1309

self.approved = value

1310

gobject.timeout_add(timedelta_to_milliseconds

883

self._approved = value

884

gobject.timeout_add(self._timedelta_to_milliseconds

1311

885

(self.approval_duration),

1312

886

self._reset_approved)

1313

887

1314

888

1315

889

## D-Bus methods, signals & properties

1316

_interface = "se.recompile.Mandos.Client"

1317

1318

## Interfaces

1319

1320

@dbus_interface_annotations(_interface)

1321

def _foo(self):

1322

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

1323

"false"}

890

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

1324

891

1325

892

## Signals

1326

893

1412

979

if value is None: # get

1413

980

return dbus.Boolean(self.approved_by_default)

1414

981

self.approved_by_default = bool(value)

982

# Emit D-Bus signal

983

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

984

dbus.Boolean(value, variant_level=1))

1415

985

1416

986

# ApprovalDelay - property

1417

987

@dbus_service_property(_interface, signature="t",

1420

990

if value is None: # get

1421

991

return dbus.UInt64(self.approval_delay_milliseconds())

1422

992

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

993

# Emit D-Bus signal

994

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

995

dbus.UInt64(value, variant_level=1))

1423

996

1424

997

# ApprovalDuration - property

1425

998

@dbus_service_property(_interface, signature="t",

1426

999

access="readwrite")

1427

1000

def ApprovalDuration_dbus_property(self, value=None):

1428

1001

if value is None: # get

1429

return dbus.UInt64(timedelta_to_milliseconds(

1002

return dbus.UInt64(self._timedelta_to_milliseconds(

1430

1003

self.approval_duration))

1431

1004

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

1005

# Emit D-Bus signal

1006

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

1007

dbus.UInt64(value, variant_level=1))

1432

1008

1433

1009

# Name - property

1434

1010

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

1446

1022

def Host_dbus_property(self, value=None):

1447

1023

if value is None: # get

1448

1024

return dbus.String(self.host)

1449

self.host = unicode(value)

1025

self.host = value

1026

# Emit D-Bus signal

1027

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

1028

dbus.String(value, variant_level=1))

1450

1029

1451

1030

# Created - property

1452

1031

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

1453

1032

def Created_dbus_property(self):

1454

return datetime_to_dbus(self.created)

1033

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

1455

1034

1456

1035

# LastEnabled - property

1457

1036

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

1458

1037

def LastEnabled_dbus_property(self):

1459

return datetime_to_dbus(self.last_enabled)

1038

if self.last_enabled is None:

1039

return dbus.String("")

1040

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

1460

1041

1461

1042

# Enabled - property

1462

1043

@dbus_service_property(_interface, signature="b",

1476

1057

if value is not None:

1477

1058

self.checked_ok()

1478

1059

return

1479

return datetime_to_dbus(self.last_checked_ok)

1480

1481

# LastCheckerStatus - property

1482

@dbus_service_property(_interface, signature="n",

1483

access="read")

1484

def LastCheckerStatus_dbus_property(self):

1485

return dbus.Int16(self.last_checker_status)

1486

1487

# Expires - property

1488

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

1489

def Expires_dbus_property(self):

1490

return datetime_to_dbus(self.expires)

1060

if self.last_checked_ok is None:

1061

return dbus.String("")

1062

return dbus.String(self._datetime_to_dbus(self

1063

.last_checked_ok))

1491

1064

1492

1065

# LastApprovalRequest - property

1493

1066

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

1494

1067

def LastApprovalRequest_dbus_property(self):

1495

return datetime_to_dbus(self.last_approval_request)

1068

if self.last_approval_request is None:

1069

return dbus.String("")

1070

return dbus.String(self.

1071

_datetime_to_dbus(self

1072

.last_approval_request))

1496

1073

1497

1074

# Timeout - property

1498

1075

@dbus_service_property(_interface, signature="t",

1501

1078

if value is None: # get

1502

1079

return dbus.UInt64(self.timeout_milliseconds())

1503

1080

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

1081

# Emit D-Bus signal

1082

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

1083

dbus.UInt64(value, variant_level=1))

1084

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

1085

return

1504

1086

# Reschedule timeout

1505

if self.enabled:

1506

now = datetime.datetime.utcnow()

1507

time_to_die = timedelta_to_milliseconds(

1508

(self.last_checked_ok + self.timeout) - now)

1509

if time_to_die <= 0:

1510

# The timeout has passed

1511

self.disable()

1512

else:

1513

self.expires = (now +

1514

datetime.timedelta(milliseconds =

1515

time_to_die))

1516

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

1517

is None):

1518

return

1519

gobject.source_remove(self.disable_initiator_tag)

1520

self.disable_initiator_tag = (gobject.timeout_add

1521

(time_to_die,

1522

self.disable))

1523

1524

# ExtendedTimeout - property

1525

@dbus_service_property(_interface, signature="t",

1526

access="readwrite")

1527

def ExtendedTimeout_dbus_property(self, value=None):

1528

if value is None: # get

1529

return dbus.UInt64(self.extended_timeout_milliseconds())

1530

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

1087

gobject.source_remove(self.disable_initiator_tag)

1088

self.disable_initiator_tag = None

1089

time_to_die = (self.

1090

_timedelta_to_milliseconds((self

1091

.last_checked_ok

1092

+ self.timeout)

1093

- datetime.datetime

1094

.utcnow()))

1095

if time_to_die <= 0:

1096

# The timeout has passed

1097

self.disable()

1098

else:

1099

self.disable_initiator_tag = (gobject.timeout_add

1100

(time_to_die, self.disable))

1531

1101

1532

1102

# Interval - property

1533

1103

@dbus_service_property(_interface, signature="t",

1536

1106

if value is None: # get

1537

1107

return dbus.UInt64(self.interval_milliseconds())

1538

1108

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

1109

# Emit D-Bus signal

1110

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

1111

dbus.UInt64(value, variant_level=1))

1539

1112

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

1540

1113

return

1541

if self.enabled:

1542

# Reschedule checker run

1543

gobject.source_remove(self.checker_initiator_tag)

1544

self.checker_initiator_tag = (gobject.timeout_add

1545

(value, self.start_checker))

1546

self.start_checker() # Start one now, too

1547

1114

# Reschedule checker run

1115

gobject.source_remove(self.checker_initiator_tag)

1116

self.checker_initiator_tag = (gobject.timeout_add

1117

(value, self.start_checker))

1118

self.start_checker() # Start one now, too

1119

1548

1120

# Checker - property

1549

1121

@dbus_service_property(_interface, signature="s",

1550

1122

access="readwrite")

1551

1123

def Checker_dbus_property(self, value=None):

1552

1124

if value is None: # get

1553

1125

return dbus.String(self.checker_command)

1554

self.checker_command = unicode(value)

1126

self.checker_command = value

1127

# Emit D-Bus signal

1128

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

1129

dbus.String(self.checker_command,

1130

variant_level=1))

1555

1131

1556

1132

# CheckerRunning - property

1557

1133

@dbus_service_property(_interface, signature="b",

1584

1160

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

1585

1161

if not self._pipe.recv():

1586

1162

raise KeyError()

1587

1163

1588

1164

def __getattribute__(self, name):

1589

if name == '_pipe':

1165

if(name == '_pipe'):

1590

1166

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

1591

1167

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

1592

1168

data = self._pipe.recv()

1597

1173

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

1598

1174

return self._pipe.recv()[1]

1599

1175

return func

1600

1176

1601

1177

def __setattr__(self, name, value):

1602

if name == '_pipe':

1178

if(name == '_pipe'):

1603

1179

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

1604

1180

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

1605

1181

1606

1182

1607

class ClientDBusTransitional(ClientDBus):

1608

__metaclass__ = AlternateDBusNamesMetaclass

1609

1610

1611

1183

class ClientHandler(socketserver.BaseRequestHandler, object):

1612

1184

"""A class to handle client connections.

1613

1185

1620

1192

unicode(self.client_address))

1621

1193

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

1622

1194

self.server.child_pipe.fileno())

1623

1195

1624

1196

session = (gnutls.connection

1625

1197

.ClientSession(self.request,

1626

1198

gnutls.connection

1627

1199

.X509Credentials()))

1628

1200

1629

1201

# Note: gnutls.connection.X509Credentials is really a

1630

1202

# generic GnuTLS certificate credentials object so long as

1631

1203

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

1632

1204

# here despite using OpenPGP certificates.

1633

1205

1634

1206

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

1635

1207

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

1636

1208

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

1642

1214

(gnutls.library.functions

1643

1215

.gnutls_priority_set_direct(session._c_object,

1644

1216

priority, None))

1645

1217

1646

1218

# Start communication using the Mandos protocol

1647

1219

# Get protocol number

1648

1220

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

1653

1225

except (ValueError, IndexError, RuntimeError) as error:

1654

1226

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

1655

1227

return

1656

1228

1657

1229

# Start GnuTLS connection

1658

1230

try:

1659

1231

session.handshake()

1663

1235

# established. Just abandon the request.

1664

1236

return

1665

1237

logger.debug("Handshake succeeded")

1666

1238

1667

1239

approval_required = False

1668

1240

try:

1669

1241

try:

1674

1246

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

1675

1247

return

1676

1248

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

1677

1249

1678

1250

try:

1679

1251

client = ProxyClient(child_pipe, fpr,

1680

1252

self.client_address)

1688

1260

1689

1261

while True:

1690

1262

if not client.enabled:

1691

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

1263

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

1692

1264

client.name)

1693

1265

if self.server.use_dbus:

1694

1266

# Emit D-Bus signal

1695

client.Rejected("Disabled")

1267

client.Rejected("Disabled")

1696

1268

return

1697

1269

1698

if client.approved or not client.approval_delay:

1270

if client._approved or not client.approval_delay:

1699

1271

#We are approved or approval is disabled

1700

1272

break

1701

elif client.approved is None:

1273

elif client._approved is None:

1702

1274

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

1703

1275

client.name)

1704

1276

if self.server.use_dbus:

1715

1287

return

1716

1288

1717

1289

#wait until timeout or approved

1290

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

1718

1291

time = datetime.datetime.now()

1719

1292

client.changedstate.acquire()

1720

(client.changedstate.wait

1721

(float(client.timedelta_to_milliseconds(delay)

1722

/ 1000)))

1293

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

1723

1294

client.changedstate.release()

1724

1295

time2 = datetime.datetime.now()

1725

1296

if (time2 - time) >= delay:

1747

1318

sent, len(client.secret)

1748

1319

- (sent_size + sent))

1749

1320

sent_size += sent

1750

1321

1751

1322

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

1752

# bump the timeout using extended_timeout

1753

client.bump_timeout(client.extended_timeout)

1323

# bump the timeout as if seen

1324

client.checked_ok()

1754

1325

if self.server.use_dbus:

1755

1326

# Emit D-Bus signal

1756

1327

client.GotSecret()

1823

1394

# Convert the buffer to a Python bytestring

1824

1395

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

1825

1396

# Convert the bytestring to hexadecimal notation

1826

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

1397

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

1827

1398

return hex_fpr

1828

1399

1829

1400

1832

1403

def sub_process_main(self, request, address):

1833

1404

try:

1834

1405

self.finish_request(request, address)

1835

except Exception:

1406

except:

1836

1407

self.handle_error(request, address)

1837

1408

self.close_request(request)

1838

1409

1839

1410

def process_request(self, request, address):

1840

1411

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

1841

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

1842

args = (request,

1843

address))

1844

proc.start()

1845

return proc

1846

1412

multiprocessing.Process(target = self.sub_process_main,

1413

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

1847

1414

1848

1415

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1849

1416

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

1853

1420

This function creates a new pipe in self.pipe

1854

1421

"""

1855

1422

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1856

1857

proc = MultiprocessingMixIn.process_request(self, request,

1858

client_address)

1423

1424

super(MultiprocessingMixInWithPipe,

1425

self).process_request(request, client_address)

1859

1426

self.child_pipe.close()

1860

self.add_pipe(parent_pipe, proc)

1861

1862

def add_pipe(self, parent_pipe, proc):

1427

self.add_pipe(parent_pipe)

1428

1429

def add_pipe(self, parent_pipe):

1863

1430

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

1864

1431

raise NotImplementedError

1865

1432

1866

1867

1433

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1868

1434

socketserver.TCPServer, object):

1869

1435

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

1943

1509

self.enabled = False

1944

1510

self.clients = clients

1945

1511

if self.clients is None:

1946

self.clients = {}

1512

self.clients = set()

1947

1513

self.use_dbus = use_dbus

1948

1514

self.gnutls_priority = gnutls_priority

1949

1515

IPv6_TCPServer.__init__(self, server_address,

1953

1519

def server_activate(self):

1954

1520

if self.enabled:

1955

1521

return socketserver.TCPServer.server_activate(self)

1956

1957

1522

def enable(self):

1958

1523

self.enabled = True

1959

1960

def add_pipe(self, parent_pipe, proc):

1524

def add_pipe(self, parent_pipe):

1961

1525

# Call "handle_ipc" for both data and EOF events

1962

1526

gobject.io_add_watch(parent_pipe.fileno(),

1963

1527

gobject.IO_IN | gobject.IO_HUP,

1964

1528

functools.partial(self.handle_ipc,

1965

parent_pipe =

1966

parent_pipe,

1967

proc = proc))

1968

1529

parent_pipe = parent_pipe))

1530

1969

1531

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

1970

proc = None, client_object=None):

1532

client_object=None):

1971

1533

condition_names = {

1972

1534

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

1973

1535

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

1982

1544

for cond, name in

1983

1545

condition_names.iteritems()

1984

1546

if cond & condition)

1985

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

1547

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

1986

1548

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

1987

# Wait for other process to exit

1988

proc.join()

1989

1549

return False

1990

1550

1991

1551

# Read a request from the child

1996

1556

fpr = request[1]

1997

1557

address = request[2]

1998

1558

1999

for c in self.clients.itervalues():

1559

for c in self.clients:

2000

1560

if c.fingerprint == fpr:

2001

1561

client = c

2002

1562

break

2003

1563

else:

2004

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

2005

"dress: %s", fpr, address)

1564

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

1565

"dress: %s", fpr, address)

2006

1566

if self.use_dbus:

2007

1567

# Emit D-Bus signal

2008

mandos_dbus_service.ClientNotFound(fpr,

2009

address[0])

1568

mandos_dbus_service.ClientNotFound(fpr, address[0])

2010

1569

parent_pipe.send(False)

2011

1570

return False

2012

1571

2013

1572

gobject.io_add_watch(parent_pipe.fileno(),

2014

1573

gobject.IO_IN | gobject.IO_HUP,

2015

1574

functools.partial(self.handle_ipc,

2016

parent_pipe =

2017

parent_pipe,

2018

proc = proc,

2019

client_object =

2020

client))

1575

parent_pipe = parent_pipe,

1576

client_object = client))

2021

1577

parent_pipe.send(True)

2022

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

2023

# same fileno

1578

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

2024

1579

return False

2025

1580

if command == 'funcall':

2026

1581

funcname = request[1]

2027

1582

args = request[2]

2028

1583

kwargs = request[3]

2029

1584

2030

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

2031

funcname)(*args,

2032

**kwargs)))

2033

1585

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

1586

2034

1587

if command == 'getattr':

2035

1588

attrname = request[1]

2036

1589

if callable(client_object.__getattribute__(attrname)):

2037

1590

parent_pipe.send(('function',))

2038

1591

else:

2039

parent_pipe.send(('data', client_object

2040

.__getattribute__(attrname)))

1592

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

2041

1593

2042

1594

if command == 'setattr':

2043

1595

attrname = request[1]

2044

1596

value = request[2]

2045

1597

setattr(client_object, attrname, value)

2046

1598

2047

1599

return True

2048

1600

2049

1601

2086

1638

return timevalue

2087

1639

2088

1640

1641

def if_nametoindex(interface):

1642

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

1643

1644

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

1645

global if_nametoindex

1646

try:

1647

if_nametoindex = (ctypes.cdll.LoadLibrary

1648

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

1649

.if_nametoindex)

1650

except (OSError, AttributeError):

1651

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

1652

def if_nametoindex(interface):

1653

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

1654

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

1655

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

1656

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1657

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

1658

interface))

1659

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

1660

ifreq[16:20])[0]

1661

return interface_index

1662

return if_nametoindex(interface)

1663

1664

2089

1665

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

2090

1666

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

2091

1667

2099

1675

sys.exit()

2100

1676

if not noclose:

2101

1677

# Close all standard open file descriptors

2102

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

1678

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

2103

1679

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

2104

1680

raise OSError(errno.ENODEV,

2105

1681

"%s not a character device"

2106

% os.devnull)

1682

% os.path.devnull)

2107

1683

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

2108

1684

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

2109

1685

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

2146

1722

" system bus interface")

2147

1723

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

2148

1724

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

2149

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

2150

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

2151

" state")

2152

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

2153

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

2154

2155

1725

options = parser.parse_args()

2156

1726

2157

1727

if options.check:

2170

1740

"use_dbus": "True",

2171

1741

"use_ipv6": "True",

2172

1742

"debuglevel": "",

2173

"restore": "True",

2174

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

2175

1743

}

2176

1744

2177

1745

# Parse config file for server-global settings

2194

1762

# options, if set.

2195

1763

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

2196

1764

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

2197

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

2198

"statedir"):

1765

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

2199

1766

value = getattr(options, option)

2200

1767

if value is not None:

2201

1768

server_settings[option] = value

2213

1780

debuglevel = server_settings["debuglevel"]

2214

1781

use_dbus = server_settings["use_dbus"]

2215

1782

use_ipv6 = server_settings["use_ipv6"]

2216

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

2217

stored_state_file)

2218

2219

if debug:

2220

initlogger(debug, logging.DEBUG)

2221

else:

2222

if not debuglevel:

2223

initlogger(debug)

2224

else:

2225

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

2226

initlogger(debug, level)

2227

1783

2228

1784

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

2229

1785

syslogger.setFormatter(logging.Formatter

2230

1786

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

2232

1788

% server_settings["servicename"]))

2233

1789

2234

1790

# Parse config file with clients

2235

client_config = configparser.SafeConfigParser(Client

2236

.client_defaults)

1791

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

1792

"interval": "5m",

1793

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

1794

"host": "",

1795

"approval_delay": "0s",

1796

"approval_duration": "1s",

1797

}

1798

client_config = configparser.SafeConfigParser(client_defaults)

2237

1799

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

2238

1800

"clients.conf"))

2239

1801

2256

1818

except IOError:

2257

1819

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

2258

1820

2259

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

1821

try:

1822

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

1823

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

1824

except KeyError:

2260

1825

try:

2261

uid = pwd.getpwnam(name).pw_uid

2262

gid = pwd.getpwnam(name).pw_gid

2263

break

1826

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

1827

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

2264

1828

except KeyError:

2265

continue

2266

else:

2267

uid = 65534

2268

gid = 65534

1829

try:

1830

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

1831

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

1832

except KeyError:

1833

uid = 65534

1834

gid = 65534

2269

1835

try:

2270

1836

os.setgid(gid)

2271

1837

os.setuid(uid)

2273

1839

if error[0] != errno.EPERM:

2274

1840

raise error

2275

1841

1842

if not debug and not debuglevel:

1843

syslogger.setLevel(logging.WARNING)

1844

console.setLevel(logging.WARNING)

1845

if debuglevel:

1846

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

1847

syslogger.setLevel(level)

1848

console.setLevel(level)

1849

2276

1850

if debug:

2277

1851

# Enable all possible GnuTLS debugging

2278

1852

2288

1862

.gnutls_global_set_log_function(debug_gnutls))

2289

1863

2290

1864

# Redirect stdin so all checkers get /dev/null

2291

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

1865

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

2292

1866

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

2293

1867

if null > 2:

2294

1868

os.close(null)

1869

else:

1870

# No console logging

1871

logger.removeHandler(console)

2295

1872

2296

1873

# Need to fork before connecting to D-Bus

2297

1874

if not debug:

2298

1875

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

2299

1876

daemon()

2300

1877

2301

gobject.threads_init()

2302

2303

1878

global main_loop

2304

1879

# From the Avahi example code

2305

DBusGMainLoop(set_as_default=True)

1880

DBusGMainLoop(set_as_default=True )

2306

1881

main_loop = gobject.MainLoop()

2307

1882

bus = dbus.SystemBus()

2308

1883

# End of Avahi example code

2309

1884

if use_dbus:

2310

1885

try:

2311

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

1886

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

2312

1887

bus, do_not_queue=True)

2313

old_bus_name = (dbus.service.BusName

2314

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

2315

do_not_queue=True))

2316

1888

except dbus.exceptions.NameExistsException as e:

2317

1889

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

2318

1890

use_dbus = False

2319

1891

server_settings["use_dbus"] = False

2320

1892

tcp_server.use_dbus = False

2321

1893

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2322

service = AvahiServiceToSyslog(name =

2323

server_settings["servicename"],

2324

servicetype = "_mandos._tcp",

2325

protocol = protocol, bus = bus)

1894

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

1895

servicetype = "_mandos._tcp",

1896

protocol = protocol, bus = bus)

2326

1897

if server_settings["interface"]:

2327

1898

service.interface = (if_nametoindex

2328

1899

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

2332

1903

2333

1904

client_class = Client

2334

1905

if use_dbus:

2335

client_class = functools.partial(ClientDBusTransitional,

2336

bus = bus)

2337

2338

client_settings = Client.config_parser(client_config)

2339

old_client_settings = {}

2340

clients_data = {}

2341

2342

# Get client data and settings from last running state.

2343

if server_settings["restore"]:

2344

try:

2345

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

2346

clients_data, old_client_settings = (pickle.load

2347

(stored_state))

2348

os.remove(stored_state_path)

2349

except IOError as e:

2350

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

2351

.format(e))

2352

if e.errno != errno.ENOENT:

2353

raise

2354

except EOFError as e:

2355

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

2356

"EOFError: {0}".format(e))

2357

2358

with PGPEngine() as pgp:

2359

for client_name, client in clients_data.iteritems():

2360

# Decide which value to use after restoring saved state.

2361

# We have three different values: Old config file,

2362

# new config file, and saved state.

2363

# New config value takes precedence if it differs from old

2364

# config value, otherwise use saved state.

2365

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

2366

try:

2367

# For each value in new config, check if it

2368

# differs from the old config value (Except for

2369

# the "secret" attribute)

2370

if (name != "secret" and

2371

value != old_client_settings[client_name]

2372

[name]):

2373

client[name] = value

2374

except KeyError:

2375

pass

2376

2377

# Clients who has passed its expire date can still be

2378

# enabled if its last checker was successful. Clients

2379

# whose checker succeeded before we stored its state is

2380

# assumed to have successfully run all checkers during

2381

# downtime.

2382

if client["enabled"]:

2383

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

2384

if not client["last_checked_ok"]:

2385

logger.warning(

2386

"disabling client {0} - Client never "

2387

"performed a successful checker"

2388

.format(client_name))

2389

client["enabled"] = False

2390

elif client["last_checker_status"] != 0:

2391

logger.warning(

2392

"disabling client {0} - Client "

2393

"last checker failed with error code {1}"

2394

.format(client_name,

2395

client["last_checker_status"]))

2396

client["enabled"] = False

2397

else:

2398

client["expires"] = (datetime.datetime

2399

.utcnow()

2400

+ client["timeout"])

2401

logger.debug("Last checker succeeded,"

2402

" keeping {0} enabled"

2403

.format(client_name))

1906

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

1907

def client_config_items(config, section):

1908

special_settings = {

1909

"approved_by_default":

1910

lambda: config.getboolean(section,

1911

"approved_by_default"),

1912

}

1913

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

2404

1914

try:

2405

client["secret"] = (

2406

pgp.decrypt(client["encrypted_secret"],

2407

client_settings[client_name]

2408

["secret"]))

2409

except PGPError:

2410

# If decryption fails, we use secret from new settings

2411

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

2412

.format(client_name))

2413

client["secret"] = (

2414

client_settings[client_name]["secret"])

2415

2416

2417

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

2418

for client_name in (set(old_client_settings)

2419

- set(client_settings)):

2420

del clients_data[client_name]

2421

for client_name in (set(client_settings)

2422

- set(old_client_settings)):

2423

clients_data[client_name] = client_settings[client_name]

2424

2425

# Create all client objects

2426

for client_name, client in clients_data.iteritems():

2427

tcp_server.clients[client_name] = client_class(

2428

name = client_name, settings = client)

2429

1915

yield (name, special_settings[name]())

1916

except KeyError:

1917

yield (name, value)

1918

1919

tcp_server.clients.update(set(

1920

client_class(name = section,

1921

config= dict(client_config_items(

1922

client_config, section)))

1923

for section in client_config.sections()))

2430

1924

if not tcp_server.clients:

2431

1925

logger.warning("No clients defined")

2432

1926

2443

1937

# "pidfile" was never created

2444

1938

pass

2445

1939

del pidfilename

1940

2446

1941

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

2447

1942

2448

1943

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

2449

1944

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

2450

1945

2451

1946

if use_dbus:

2452

class MandosDBusService(DBusObjectWithProperties):

1947

class MandosDBusService(dbus.service.Object):

2453

1948

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

2454

1949

def __init__(self):

2455

1950

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

2456

_interface = "se.recompile.Mandos"

2457

2458

@dbus_interface_annotations(_interface)

2459

def _foo(self):

2460

return { "org.freedesktop.DBus.Property"

2461

".EmitsChangedSignal":

2462

"false"}

1951

_interface = "se.bsnet.fukt.Mandos"

2463

1952

2464

1953

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

2465

1954

def ClientAdded(self, objpath):

2480

1969

def GetAllClients(self):

2481

1970

"D-Bus method"

2482

1971

return dbus.Array(c.dbus_object_path

2483

for c in

2484

tcp_server.clients.itervalues())

1972

for c in tcp_server.clients)

2485

1973

2486

1974

@dbus.service.method(_interface,

2487

1975

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

2489

1977

"D-Bus method"

2490

1978

return dbus.Dictionary(

2491

1979

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

2492

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

1980

for c in tcp_server.clients),

2493

1981

signature="oa{sv}")

2494

1982

2495

1983

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

2496

1984

def RemoveClient(self, object_path):

2497

1985

"D-Bus method"

2498

for c in tcp_server.clients.itervalues():

1986

for c in tcp_server.clients:

2499

1987

if c.dbus_object_path == object_path:

2500

del tcp_server.clients[c.name]

1988

tcp_server.clients.remove(c)

2501

1989

c.remove_from_connection()

2502

1990

# Don't signal anything except ClientRemoved

2503

1991

c.disable(quiet=True)

2508

1996

2509

1997

del _interface

2510

1998

2511

class MandosDBusServiceTransitional(MandosDBusService):

2512

__metaclass__ = AlternateDBusNamesMetaclass

2513

mandos_dbus_service = MandosDBusServiceTransitional()

1999

mandos_dbus_service = MandosDBusService()

2514

2000

2515

2001

def cleanup():

2516

2002

"Cleanup function; run on exit"

2517

2003

service.cleanup()

2518

2004

2519

multiprocessing.active_children()

2520

if not (tcp_server.clients or client_settings):

2521

return

2522

2523

# Store client before exiting. Secrets are encrypted with key

2524

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

2525

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

2526

clients = {}

2527

with PGPEngine() as pgp:

2528

for client in tcp_server.clients.itervalues():

2529

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

2530

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

2531

key)

2532

client_dict = {}

2533

2534

# A list of attributes that can not be pickled

2535

# + secret.

2536

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

2537

"checker"))

2538

for name, typ in (inspect.getmembers

2539

(dbus.service.Object)):

2540

exclude.add(name)

2541

2542

client_dict["encrypted_secret"] = (client

2543

.encrypted_secret)

2544

for attr in client.client_structure:

2545

if attr not in exclude:

2546

client_dict[attr] = getattr(client, attr)

2547

2548

clients[client.name] = client_dict

2549

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

2550

2551

try:

2552

tempfd, tempname = tempfile.mkstemp(suffix=".pickle",

2553

prefix="clients-",

2554

dir=os.path.dirname

2555

(stored_state_path))

2556

with os.fdopen(tempfd, "wb") as stored_state:

2557

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

2558

os.rename(tempname, stored_state_path)

2559

except (IOError, OSError) as e:

2560

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

2561

.format(e))

2562

if not debug:

2563

try:

2564

os.remove(tempname)

2565

except NameError:

2566

pass

2567

if e.errno not in set((errno.ENOENT, errno.EACCES,

2568

errno.EEXIST)):

2569

raise e

2570

2571

# Delete all clients, and settings from config

2572

2005

while tcp_server.clients:

2573

name, client = tcp_server.clients.popitem()

2006

client = tcp_server.clients.pop()

2574

2007

if use_dbus:

2575

2008

client.remove_from_connection()

2009

client.disable_hook = None

2576

2010

# Don't signal anything except ClientRemoved

2577

2011

client.disable(quiet=True)

2578

2012

if use_dbus:

2579

2013

# Emit D-Bus signal

2580

mandos_dbus_service.ClientRemoved(client

2581

.dbus_object_path,

2014

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2582

2015

client.name)

2583

client_settings.clear()

2584

2016

2585

2017

atexit.register(cleanup)

2586

2018

2587

for client in tcp_server.clients.itervalues():

2019

for client in tcp_server.clients:

2588

2020

if use_dbus:

2589

2021

# Emit D-Bus signal

2590

2022

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2591

# Need to initiate checking of clients

2592

if client.enabled:

2593

client.init_checker()

2023

client.enable()

2594

2024

2595

2025

tcp_server.enable()

2596

2026

tcp_server.server_activate()

2612

2042

try:

2613

2043

service.activate()

2614

2044

except dbus.exceptions.DBusException as error:

2615

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

2045

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

2616

2046

cleanup()

2617

2047

sys.exit(1)

2618

2048

# End of Avahi example code

2625

2055

logger.debug("Starting main loop")

2626

2056

main_loop.run()

2627

2057

except AvahiError as error:

2628

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

2058

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

2629

2059

cleanup()

2630

2060

sys.exit(1)

2631

2061

except KeyboardInterrupt: