/mandos/trunk : revision 474

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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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self.group = None # our entry group

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

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

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

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self.name)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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

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except dbus.exceptions.DBusException, error:

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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def remove(self):

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

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match.remove()

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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if self.group is None:

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self.group = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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self.server.EntryGroupNew()),

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self.entry_group_state_changed))

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self.group.connect_to_signal('StateChanged',

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self

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.entry_group_state_changed)

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

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self.name, self.type)

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self.group.AddService(

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def cleanup(self):

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

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if self.group is not None:

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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException):

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pass

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self.group.Free()

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self.group = None

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self.remove()

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

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def server_state_changed(self, state):

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

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

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bad_states = { avahi.SERVER_INVALID:

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"Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION:

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"Zeroconf server name collision",

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avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

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if state in bad_states:

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if bad_states[state] is not None:

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if error is None:

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logger.error(bad_states[state])

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else:

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

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self.cleanup()

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if state == avahi.SERVER_COLLISION:

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logger.error("Zeroconf server name collision")

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self.remove()

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elif state == avahi.SERVER_RUNNING:

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self.add()

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else:

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if error is None:

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

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else:

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

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def activate(self):

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

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if self.server is None:

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self.server = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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avahi.DBUS_PATH_SERVER,

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follow_name_owner_changes=True),

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avahi.DBUS_PATH_SERVER),

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avahi.DBUS_INTERFACE_SERVER)

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self.server.connect_to_signal("StateChanged",

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self.server_state_changed)

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

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class AvahiServiceToSyslog(AvahiService):

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def rename(self):

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

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ret = AvahiService.rename(self)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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return ret

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def timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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class Client(object):

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

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Attributes:

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

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

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

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

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

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

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checker_initiator_tag: a gobject event source tag, or None

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

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client_structure: Object describing what attributes a client has

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and is used for storing the client at exit

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current_checker_command: string; current running checker_command

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

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disable_initiator_tag: a gobject event source tag, or None

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enabled: bool()

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

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

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

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

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last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, -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):

460

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

468

value given the same arguments.

469

"""

470

settings = {}

471

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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475

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

476

# Reformat values from string types to Python types

477

client["approved_by_default"] = config.getboolean(

478

client_name, "approved_by_default")

479

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

480

"enabled")

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

483

.replace(" ", ""))

484

if "secret" in section:

485

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

486

elif "secfile" in section:

487

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

488

(section["secfile"])),

489

"rb") as secfile:

490

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

491

else:

492

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

493

% section)

494

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

495

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

504

client["last_checked_ok"] = None

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client["last_checker_status"] = -2

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return settings

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509

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

297

return self._timedelta_to_milliseconds(self.approval_delay)

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299

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

511

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

512

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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():

517

setattr(self, setting, value)

518

519

if self.enabled:

520

if not hasattr(self, "last_enabled"):

521

self.last_enabled = datetime.datetime.utcnow()

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if not hasattr(self, "expires"):

523

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

524

+ self.timeout)

525

else:

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self.last_enabled = None

527

self.expires = None

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304

if config is None:

305

config = {}

529

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

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307

# 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

310

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

311

.replace(" ", ""))

533

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

534

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

535

datetime.datetime.utcnow())

536

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# attributes specific for this server instance

313

if "secret" in config:

314

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

315

elif "secfile" in config:

316

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

317

(config["secfile"])),

318

"rb") as secfile:

319

self.secret = secfile.read()

320

else:

321

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

322

% self.name)

323

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

324

self.created = datetime.datetime.utcnow()

325

self.enabled = False

326

self.last_approval_request = None

327

self.last_enabled = None

328

self.last_checked_ok = None

329

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

330

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

331

self.disable_hook = disable_hook

538

332

self.checker = None

539

333

self.checker_initiator_tag = None

540

334

self.disable_initiator_tag = None

541

335

self.checker_callback_tag = None

336

self.checker_command = config["checker"]

542

337

self.current_checker_command = None

543

self.approved = None

338

self.last_connect = None

339

self._approved = None

340

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

341

True)

544

342

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

553

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)

343

self.approval_delay = string_to_delta(

344

config["approval_delay"])

345

self.approval_duration = string_to_delta(

346

config["approval_duration"])

347

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

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348

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# Send notice to process children that client state has changed

561

349

def send_changedstate(self):

562

with self.changedstate:

563

self.changedstate.notify_all()

564

350

self.changedstate.acquire()

351

self.changedstate.notify_all()

352

self.changedstate.release()

353

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def enable(self):

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

567

356

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

568

357

# 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

360

self.last_enabled = datetime.datetime.utcnow()

574

self.init_checker()

361

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

362

# and every interval from then on.

363

self.checker_initiator_tag = (gobject.timeout_add

364

(self.interval_milliseconds(),

365

self.start_checker))

366

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

367

self.disable_initiator_tag = (gobject.timeout_add

368

(self.timeout_milliseconds(),

369

self.disable))

370

self.enabled = True

371

# Also start a new checker *right now*.

372

self.start_checker()

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373

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def disable(self, quiet=True):

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375

"""Disable this client."""

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382

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

585

383

gobject.source_remove(self.disable_initiator_tag)

586

384

self.disable_initiator_tag = None

587

self.expires = None

588

385

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

589

386

gobject.source_remove(self.checker_initiator_tag)

590

387

self.checker_initiator_tag = None

591

388

self.stop_checker()

389

if self.disable_hook:

390

self.disable_hook(self)

592

391

self.enabled = False

593

392

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

594

393

return False

595

394

596

395

def __del__(self):

396

self.disable_hook = None

597

397

self.disable()

598

398

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(),

608

self.disable))

609

# Also start a new checker *right now*.

610

self.start_checker()

611

612

399

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

613

400

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

614

401

self.checker_callback_tag = None

615

402

self.checker = None

616

403

if os.WIFEXITED(condition):

617

self.last_checker_status = os.WEXITSTATUS(condition)

618

if self.last_checker_status == 0:

404

exitstatus = os.WEXITSTATUS(condition)

405

if exitstatus == 0:

619

406

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

620

407

vars(self))

621

408

self.checked_ok()

623

410

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

624

411

vars(self))

625

412

else:

626

self.last_checker_status = -1

627

413

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

628

414

vars(self))

629

415

630

416

def checked_ok(self):

631

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

417

"""Bump up the timeout for this client.

418

419

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

420

alive and well.

421

"""

632

422

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

423

gobject.source_remove(self.disable_initiator_tag)

424

self.disable_initiator_tag = (gobject.timeout_add

425

(self.timeout_milliseconds(),

426

self.disable))

647

427

648

428

def need_approval(self):

649

429

self.last_approval_request = datetime.datetime.utcnow()

665

445

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

666

446

try:

667

447

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

668

except (AttributeError, OSError) as error:

448

except (AttributeError, OSError), error:

669

449

if (isinstance(error, OSError)

670

450

and error.errno != errno.ECHILD):

671

451

raise error

689

469

'replace')))

690

470

for attr in

691

471

self.runtime_expansions)

692

472

693

473

try:

694

474

command = self.checker_command % escaped_attrs

695

except TypeError as error:

696

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

697

self.checker_command, exc_info=error)

475

except TypeError, error:

476

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

477

' %s', self.checker_command, error)

698

478

return True # Try again later

699

479

self.current_checker_command = command

700

480

try:

717

497

if pid:

718

498

gobject.source_remove(self.checker_callback_tag)

719

499

self.checker_callback(pid, status, command)

720

except OSError as error:

721

logger.error("Failed to start subprocess",

722

exc_info=error)

500

except OSError, error:

501

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

502

error)

723

503

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

724

504

return True

725

505

732

512

return

733

513

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

734

514

try:

735

self.checker.terminate()

515

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

736

516

#time.sleep(0.5)

737

517

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

738

# self.checker.kill()

739

except OSError as error:

518

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

519

except OSError, error:

740

520

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

741

521

raise

742

522

self.checker = None

743

523

744

745

524

def dbus_service_property(dbus_interface, signature="v",

746

525

access="readwrite", byte_arrays=False):

747

526

"""Decorators for marking methods of a DBusObjectWithProperties to

772

551

return decorator

773

552

774

553

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

554

class DBusPropertyException(dbus.exceptions.DBusException):

813

555

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

814

556

"""

830

572

831

573

class DBusObjectWithProperties(dbus.service.Object):

832

574

"""A D-Bus object with properties.

833

575

834

576

Classes inheriting from this can use the dbus_service_property

835

577

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

836

578

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

837

579

"""

838

580

839

581

@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)

582

def _is_dbus_property(obj):

583

return getattr(obj, "_dbus_is_property", False)

848

584

849

def _get_all_dbus_things(self, thing):

585

def _get_all_dbus_properties(self):

850

586

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

851

587

"""

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)))

588

return ((prop._dbus_name, prop)

589

for name, prop in

590

inspect.getmembers(self, self._is_dbus_property))

859

591

860

592

def _get_dbus_property(self, interface_name, property_name):

861

593

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

862

594

property with the specified name and interface.

863

595

"""

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

596

for name in (property_name,

597

property_name + "_dbus_property"):

598

prop = getattr(self, name, None)

599

if (prop is None

600

or not self._is_dbus_property(prop)

601

or prop._dbus_name != property_name

602

or (interface_name and prop._dbus_interface

603

and interface_name != prop._dbus_interface)):

604

continue

605

return prop

872

606

# No such property

873

607

raise DBusPropertyNotFound(self.dbus_object_path + ":"

874

608

+ interface_name + "."

899

633

# signatures other than "ay".

900

634

if prop._dbus_signature != "ay":

901

635

raise ValueError

902

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

903

for byte in value))

636

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

637

for byte in value))

904

638

prop(value)

905

639

906

640

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

908

642

def GetAll(self, interface_name):

909

643

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

910

644

standard.

911

645

912

646

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

913

647

"""

914

properties = {}

915

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

648

all = {}

649

for name, prop in self._get_all_dbus_properties():

916

650

if (interface_name

917

651

and interface_name != prop._dbus_interface):

918

652

# Interface non-empty but did not match

922

656

continue

923

657

value = prop()

924

658

if not hasattr(value, "variant_level"):

925

properties[name] = value

659

all[name] = value

926

660

continue

927

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

928

value.variant_level+1)

929

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

661

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

662

value.variant_level+1)

663

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

930

664

931

665

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

932

666

out_signature="s",

933

667

path_keyword='object_path',

934

668

connection_keyword='connection')

935

669

def Introspect(self, object_path, connection):

936

"""Overloading of standard D-Bus method.

937

938

Inserts property tags and interface annotation tags.

670

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

939

671

"""

940

672

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

941

673

connection)

948

680

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

949

681

return e

950

682

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

951

# Add property tags

952

683

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

953

684

for name, prop

954

in self._get_all_dbus_things("property")

685

in self._get_all_dbus_properties()

955

686

if prop._dbus_interface

956

687

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

957

688

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

689

# Add the names to the return values for the

990

690

# "org.freedesktop.DBus.Properties" methods

991

691

if (if_tag.getAttribute("name")

1004

704

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

1005

705

document.unlink()

1006

706

except (AttributeError, xml.dom.DOMException,

1007

xml.parsers.expat.ExpatError) as error:

707

xml.parsers.expat.ExpatError), error:

1008

708

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

1009

exc_info=error)

709

error)

1010

710

return xmlstring

1011

711

1012

712

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

713

class ClientDBus(Client, DBusObjectWithProperties):

1167

714

"""A Client class using D-Bus

1168

715

1177

724

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

1178

725

1179

726

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

727

self._approvals_pending = 0

1180

728

self.bus = bus

1181

729

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

1182

730

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

1189

737

DBusObjectWithProperties.__init__(self, self.bus,

1190

738

self.dbus_object_path)

1191

739

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

740

def _get_approvals_pending(self):

741

return self._approvals_pending

742

def _set_approvals_pending(self, value):

743

old_value = self._approvals_pending

744

self._approvals_pending = value

745

bval = bool(value)

746

if (hasattr(self, "dbus_object_path")

747

and bval is not bool(old_value)):

748

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

749

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

750

dbus_bool)

751

752

approvals_pending = property(_get_approvals_pending,

753

_set_approvals_pending)

754

del _get_approvals_pending, _set_approvals_pending

755

756

@staticmethod

757

def _datetime_to_dbus(dt, variant_level=0):

758

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

759

return dbus.String(dt.isoformat(),

760

variant_level=variant_level)

761

762

def enable(self):

763

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

764

r = Client.enable(self)

765

if oldstate != self.enabled:

766

# Emit D-Bus signals

767

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

768

dbus.Boolean(True, variant_level=1))

769

self.PropertyChanged(

770

dbus.String("LastEnabled"),

771

self._datetime_to_dbus(self.last_enabled,

772

variant_level=1))

773

return r

774

775

def disable(self, quiet = False):

776

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

777

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

778

if not quiet and oldstate != self.enabled:

779

# Emit D-Bus signal

780

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

781

dbus.Boolean(False, variant_level=1))

782

return r

1260

783

1261

784

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

1262

785

try:

1271

794

*args, **kwargs):

1272

795

self.checker_callback_tag = None

1273

796

self.checker = None

797

# Emit D-Bus signal

798

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

799

dbus.Boolean(False, variant_level=1))

1274

800

if os.WIFEXITED(condition):

1275

801

exitstatus = os.WEXITSTATUS(condition)

1276

802

# Emit D-Bus signal

1286

812

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

1287

813

*args, **kwargs)

1288

814

815

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

816

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

817

# Emit D-Bus signal

818

self.PropertyChanged(

819

dbus.String("LastCheckedOK"),

820

(self._datetime_to_dbus(self.last_checked_ok,

821

variant_level=1)))

822

return r

823

824

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

825

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

826

# Emit D-Bus signal

827

self.PropertyChanged(

828

dbus.String("LastApprovalRequest"),

829

(self._datetime_to_dbus(self.last_approval_request,

830

variant_level=1)))

831

return r

832

1289

833

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

1290

834

old_checker = self.checker

1291

835

if self.checker is not None:

1298

842

and old_checker_pid != self.checker.pid):

1299

843

# Emit D-Bus signal

1300

844

self.CheckerStarted(self.current_checker_command)

845

self.PropertyChanged(

846

dbus.String("CheckerRunning"),

847

dbus.Boolean(True, variant_level=1))

1301

848

return r

1302

849

850

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

851

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

852

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

853

if (old_checker is not None

854

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

855

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

856

dbus.Boolean(False, variant_level=1))

857

return r

858

1303

859

def _reset_approved(self):

1304

self.approved = None

860

self._approved = None

1305

861

return False

1306

862

1307

863

def approve(self, value=True):

1308

864

self.send_changedstate()

1309

self.approved = value

1310

gobject.timeout_add(timedelta_to_milliseconds

865

self._approved = value

866

gobject.timeout_add(self._timedelta_to_milliseconds

1311

867

(self.approval_duration),

1312

868

self._reset_approved)

1313

869

1314

870

1315

871

## 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"}

872

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

1324

873

1325

874

## Signals

1326

875

1373

922

# CheckedOK - method

1374

923

@dbus.service.method(_interface)

1375

924

def CheckedOK(self):

1376

self.checked_ok()

925

return self.checked_ok()

1377

926

1378

927

# Enable - method

1379

928

@dbus.service.method(_interface)

1412

961

if value is None: # get

1413

962

return dbus.Boolean(self.approved_by_default)

1414

963

self.approved_by_default = bool(value)

964

# Emit D-Bus signal

965

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

966

dbus.Boolean(value, variant_level=1))

1415

967

1416

968

# ApprovalDelay - property

1417

969

@dbus_service_property(_interface, signature="t",

1420

972

if value is None: # get

1421

973

return dbus.UInt64(self.approval_delay_milliseconds())

1422

974

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

975

# Emit D-Bus signal

976

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

977

dbus.UInt64(value, variant_level=1))

1423

978

1424

979

# ApprovalDuration - property

1425

980

@dbus_service_property(_interface, signature="t",

1426

981

access="readwrite")

1427

982

def ApprovalDuration_dbus_property(self, value=None):

1428

983

if value is None: # get

1429

return dbus.UInt64(timedelta_to_milliseconds(

984

return dbus.UInt64(self._timedelta_to_milliseconds(

1430

985

self.approval_duration))

1431

986

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

987

# Emit D-Bus signal

988

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

989

dbus.UInt64(value, variant_level=1))

1432

990

1433

991

# Name - property

1434

992

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

1446

1004

def Host_dbus_property(self, value=None):

1447

1005

if value is None: # get

1448

1006

return dbus.String(self.host)

1449

self.host = unicode(value)

1007

self.host = value

1008

# Emit D-Bus signal

1009

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

1010

dbus.String(value, variant_level=1))

1450

1011

1451

1012

# Created - property

1452

1013

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

1453

1014

def Created_dbus_property(self):

1454

return datetime_to_dbus(self.created)

1015

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

1455

1016

1456

1017

# LastEnabled - property

1457

1018

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

1458

1019

def LastEnabled_dbus_property(self):

1459

return datetime_to_dbus(self.last_enabled)

1020

if self.last_enabled is None:

1021

return dbus.String("")

1022

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

1460

1023

1461

1024

# Enabled - property

1462

1025

@dbus_service_property(_interface, signature="b",

1476

1039

if value is not None:

1477

1040

self.checked_ok()

1478

1041

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)

1042

if self.last_checked_ok is None:

1043

return dbus.String("")

1044

return dbus.String(self._datetime_to_dbus(self

1045

.last_checked_ok))

1491

1046

1492

1047

# LastApprovalRequest - property

1493

1048

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

1494

1049

def LastApprovalRequest_dbus_property(self):

1495

return datetime_to_dbus(self.last_approval_request)

1050

if self.last_approval_request is None:

1051

return dbus.String("")

1052

return dbus.String(self.

1053

_datetime_to_dbus(self

1054

.last_approval_request))

1496

1055

1497

1056

# Timeout - property

1498

1057

@dbus_service_property(_interface, signature="t",

1501

1060

if value is None: # get

1502

1061

return dbus.UInt64(self.timeout_milliseconds())

1503

1062

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

1063

# Emit D-Bus signal

1064

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

1065

dbus.UInt64(value, variant_level=1))

1066

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

1067

return

1504

1068

# 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)

1069

gobject.source_remove(self.disable_initiator_tag)

1070

self.disable_initiator_tag = None

1071

time_to_die = (self.

1072

_timedelta_to_milliseconds((self

1073

.last_checked_ok

1074

+ self.timeout)

1075

- datetime.datetime

1076

.utcnow()))

1077

if time_to_die <= 0:

1078

# The timeout has passed

1079

self.disable()

1080

else:

1081

self.disable_initiator_tag = (gobject.timeout_add

1082

(time_to_die, self.disable))

1531

1083

1532

1084

# Interval - property

1533

1085

@dbus_service_property(_interface, signature="t",

1536

1088

if value is None: # get

1537

1089

return dbus.UInt64(self.interval_milliseconds())

1538

1090

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

1091

# Emit D-Bus signal

1092

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

1093

dbus.UInt64(value, variant_level=1))

1539

1094

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

1540

1095

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

1096

# Reschedule checker run

1097

gobject.source_remove(self.checker_initiator_tag)

1098

self.checker_initiator_tag = (gobject.timeout_add

1099

(value, self.start_checker))

1100

self.start_checker() # Start one now, too

1101

1548

1102

# Checker - property

1549

1103

@dbus_service_property(_interface, signature="s",

1550

1104

access="readwrite")

1551

1105

def Checker_dbus_property(self, value=None):

1552

1106

if value is None: # get

1553

1107

return dbus.String(self.checker_command)

1554

self.checker_command = unicode(value)

1108

self.checker_command = value

1109

# Emit D-Bus signal

1110

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

1111

dbus.String(self.checker_command,

1112

variant_level=1))

1555

1113

1556

1114

# CheckerRunning - property

1557

1115

@dbus_service_property(_interface, signature="b",

1584

1142

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

1585

1143

if not self._pipe.recv():

1586

1144

raise KeyError()

1587

1145

1588

1146

def __getattribute__(self, name):

1589

if name == '_pipe':

1147

if(name == '_pipe'):

1590

1148

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

1591

1149

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

1592

1150

data = self._pipe.recv()

1597

1155

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

1598

1156

return self._pipe.recv()[1]

1599

1157

return func

1600

1158

1601

1159

def __setattr__(self, name, value):

1602

if name == '_pipe':

1160

if(name == '_pipe'):

1603

1161

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

1604

1162

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

1605

1163

1606

1164

1607

class ClientDBusTransitional(ClientDBus):

1608

__metaclass__ = AlternateDBusNamesMetaclass

1609

1610

1611

1165

class ClientHandler(socketserver.BaseRequestHandler, object):

1612

1166

"""A class to handle client connections.

1613

1167

1620

1174

unicode(self.client_address))

1621

1175

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

1622

1176

self.server.child_pipe.fileno())

1623

1177

1624

1178

session = (gnutls.connection

1625

1179

.ClientSession(self.request,

1626

1180

gnutls.connection

1627

1181

.X509Credentials()))

1628

1182

1629

1183

# Note: gnutls.connection.X509Credentials is really a

1630

1184

# generic GnuTLS certificate credentials object so long as

1631

1185

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

1632

1186

# here despite using OpenPGP certificates.

1633

1187

1634

1188

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

1635

1189

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

1636

1190

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

1642

1196

(gnutls.library.functions

1643

1197

.gnutls_priority_set_direct(session._c_object,

1644

1198

priority, None))

1645

1199

1646

1200

# Start communication using the Mandos protocol

1647

1201

# Get protocol number

1648

1202

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

1650

1204

try:

1651

1205

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

1652

1206

raise RuntimeError

1653

except (ValueError, IndexError, RuntimeError) as error:

1207

except (ValueError, IndexError, RuntimeError), error:

1654

1208

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

1655

1209

return

1656

1210

1657

1211

# Start GnuTLS connection

1658

1212

try:

1659

1213

session.handshake()

1660

except gnutls.errors.GNUTLSError as error:

1214

except gnutls.errors.GNUTLSError, error:

1661

1215

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

1662

1216

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

1663

1217

# established. Just abandon the request.

1664

1218

return

1665

1219

logger.debug("Handshake succeeded")

1666

1220

1667

1221

approval_required = False

1668

1222

try:

1669

1223

try:

1670

1224

fpr = self.fingerprint(self.peer_certificate

1671

1225

(session))

1672

except (TypeError,

1673

gnutls.errors.GNUTLSError) as error:

1226

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

1674

1227

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

1675

1228

return

1676

1229

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

1677

1230

1678

1231

try:

1679

1232

client = ProxyClient(child_pipe, fpr,

1680

1233

self.client_address)

1688

1241

1689

1242

while True:

1690

1243

if not client.enabled:

1691

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

1244

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

1692

1245

client.name)

1693

1246

if self.server.use_dbus:

1694

1247

# Emit D-Bus signal

1695

client.Rejected("Disabled")

1248

client.Rejected("Disabled")

1696

1249

return

1697

1250

1698

if client.approved or not client.approval_delay:

1251

if client._approved or not client.approval_delay:

1699

1252

#We are approved or approval is disabled

1700

1253

break

1701

elif client.approved is None:

1254

elif client._approved is None:

1702

1255

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

1703

1256

client.name)

1704

1257

if self.server.use_dbus:

1715

1268

return

1716

1269

1717

1270

#wait until timeout or approved

1271

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

1718

1272

time = datetime.datetime.now()

1719

1273

client.changedstate.acquire()

1720

(client.changedstate.wait

1721

(float(client.timedelta_to_milliseconds(delay)

1722

/ 1000)))

1274

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

1723

1275

client.changedstate.release()

1724

1276

time2 = datetime.datetime.now()

1725

1277

if (time2 - time) >= delay:

1740

1292

while sent_size < len(client.secret):

1741

1293

try:

1742

1294

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

1743

except gnutls.errors.GNUTLSError as error:

1295

except (gnutls.errors.GNUTLSError), error:

1744

1296

logger.warning("gnutls send failed")

1745

1297

return

1746

1298

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

1747

1299

sent, len(client.secret)

1748

1300

- (sent_size + sent))

1749

1301

sent_size += sent

1750

1302

1751

1303

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

1752

# bump the timeout using extended_timeout

1753

client.bump_timeout(client.extended_timeout)

1304

# bump the timeout as if seen

1305

client.checked_ok()

1754

1306

if self.server.use_dbus:

1755

1307

# Emit D-Bus signal

1756

1308

client.GotSecret()

1760

1312

client.approvals_pending -= 1

1761

1313

try:

1762

1314

session.bye()

1763

except gnutls.errors.GNUTLSError as error:

1315

except (gnutls.errors.GNUTLSError), error:

1764

1316

logger.warning("GnuTLS bye failed")

1765

1317

1766

1318

@staticmethod

1823

1375

# Convert the buffer to a Python bytestring

1824

1376

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

1825

1377

# Convert the bytestring to hexadecimal notation

1826

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

1378

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

1827

1379

return hex_fpr

1828

1380

1829

1381

1832

1384

def sub_process_main(self, request, address):

1833

1385

try:

1834

1386

self.finish_request(request, address)

1835

except Exception:

1387

except:

1836

1388

self.handle_error(request, address)

1837

1389

self.close_request(request)

1838

1390

1839

1391

def process_request(self, request, address):

1840

1392

"""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

1393

multiprocessing.Process(target = self.sub_process_main,

1394

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

1847

1395

1848

1396

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1849

1397

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

1853

1401

This function creates a new pipe in self.pipe

1854

1402

"""

1855

1403

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1856

1857

proc = MultiprocessingMixIn.process_request(self, request,

1858

client_address)

1404

1405

super(MultiprocessingMixInWithPipe,

1406

self).process_request(request, client_address)

1859

1407

self.child_pipe.close()

1860

self.add_pipe(parent_pipe, proc)

1861

1862

def add_pipe(self, parent_pipe, proc):

1408

self.add_pipe(parent_pipe)

1409

1410

def add_pipe(self, parent_pipe):

1863

1411

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

1864

1412

raise NotImplementedError

1865

1413

1866

1867

1414

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1868

1415

socketserver.TCPServer, object):

1869

1416

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

1895

1442

SO_BINDTODEVICE,

1896

1443

str(self.interface

1897

1444

+ '\0'))

1898

except socket.error as error:

1445

except socket.error, error:

1899

1446

if error[0] == errno.EPERM:

1900

1447

logger.error("No permission to"

1901

1448

" bind to interface %s",

1943

1490

self.enabled = False

1944

1491

self.clients = clients

1945

1492

if self.clients is None:

1946

self.clients = {}

1493

self.clients = set()

1947

1494

self.use_dbus = use_dbus

1948

1495

self.gnutls_priority = gnutls_priority

1949

1496

IPv6_TCPServer.__init__(self, server_address,

1953

1500

def server_activate(self):

1954

1501

if self.enabled:

1955

1502

return socketserver.TCPServer.server_activate(self)

1956

1957

1503

def enable(self):

1958

1504

self.enabled = True

1959

1960

def add_pipe(self, parent_pipe, proc):

1505

def add_pipe(self, parent_pipe):

1961

1506

# Call "handle_ipc" for both data and EOF events

1962

1507

gobject.io_add_watch(parent_pipe.fileno(),

1963

1508

gobject.IO_IN | gobject.IO_HUP,

1964

1509

functools.partial(self.handle_ipc,

1965

parent_pipe =

1966

parent_pipe,

1967

proc = proc))

1968

1510

parent_pipe = parent_pipe))

1511

1969

1512

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

1970

proc = None, client_object=None):

1513

client_object=None):

1971

1514

condition_names = {

1972

1515

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

1973

1516

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

1982

1525

for cond, name in

1983

1526

condition_names.iteritems()

1984

1527

if cond & condition)

1985

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

1528

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

1986

1529

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

1987

# Wait for other process to exit

1988

proc.join()

1989

1530

return False

1990

1531

1991

1532

# Read a request from the child

1996

1537

fpr = request[1]

1997

1538

address = request[2]

1998

1539

1999

for c in self.clients.itervalues():

1540

for c in self.clients:

2000

1541

if c.fingerprint == fpr:

2001

1542

client = c

2002

1543

break

2003

1544

else:

2004

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

2005

"dress: %s", fpr, address)

1545

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

1546

"dress: %s", fpr, address)

2006

1547

if self.use_dbus:

2007

1548

# Emit D-Bus signal

2008

mandos_dbus_service.ClientNotFound(fpr,

2009

address[0])

1549

mandos_dbus_service.ClientNotFound(fpr, address[0])

2010

1550

parent_pipe.send(False)

2011

1551

return False

2012

1552

2013

1553

gobject.io_add_watch(parent_pipe.fileno(),

2014

1554

gobject.IO_IN | gobject.IO_HUP,

2015

1555

functools.partial(self.handle_ipc,

2016

parent_pipe =

2017

parent_pipe,

2018

proc = proc,

2019

client_object =

2020

client))

1556

parent_pipe = parent_pipe,

1557

client_object = client))

2021

1558

parent_pipe.send(True)

2022

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

2023

# same fileno

1559

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

2024

1560

return False

2025

1561

if command == 'funcall':

2026

1562

funcname = request[1]

2027

1563

args = request[2]

2028

1564

kwargs = request[3]

2029

1565

2030

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

2031

funcname)(*args,

2032

**kwargs)))

2033

1566

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

1567

2034

1568

if command == 'getattr':

2035

1569

attrname = request[1]

2036

1570

if callable(client_object.__getattribute__(attrname)):

2037

1571

parent_pipe.send(('function',))

2038

1572

else:

2039

parent_pipe.send(('data', client_object

2040

.__getattribute__(attrname)))

1573

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

2041

1574

2042

1575

if command == 'setattr':

2043

1576

attrname = request[1]

2044

1577

value = request[2]

2045

1578

setattr(client_object, attrname, value)

2046

1579

2047

1580

return True

2048

1581

2049

1582

2080

1613

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

2081

1614

else:

2082

1615

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

2083

except (ValueError, IndexError) as e:

1616

except (ValueError, IndexError), e:

2084

1617

raise ValueError(*(e.args))

2085

1618

timevalue += delta

2086

1619

return timevalue

2087

1620

2088

1621

1622

def if_nametoindex(interface):

1623

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

1624

1625

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

1626

global if_nametoindex

1627

try:

1628

if_nametoindex = (ctypes.cdll.LoadLibrary

1629

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

1630

.if_nametoindex)

1631

except (OSError, AttributeError):

1632

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

1633

def if_nametoindex(interface):

1634

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

1635

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

1636

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

1637

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1638

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

1639

interface))

1640

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

1641

ifreq[16:20])[0]

1642

return interface_index

1643

return if_nametoindex(interface)

1644

1645

2089

1646

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

2090

1647

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

2091

1648

2099

1656

sys.exit()

2100

1657

if not noclose:

2101

1658

# Close all standard open file descriptors

2102

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

1659

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

2103

1660

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

2104

1661

raise OSError(errno.ENODEV,

2105

1662

"%s not a character device"

2106

% os.devnull)

1663

% os.path.devnull)

2107

1664

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

2108

1665

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

2109

1666

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

2146

1703

" system bus interface")

2147

1704

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

2148

1705

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

1706

options = parser.parse_args()

2156

1707

2157

1708

if options.check:

2170

1721

"use_dbus": "True",

2171

1722

"use_ipv6": "True",

2172

1723

"debuglevel": "",

2173

"restore": "True",

2174

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

2175

1724

}

2176

1725

2177

1726

# Parse config file for server-global settings

2194

1743

# options, if set.

2195

1744

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

2196

1745

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

2197

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

2198

"statedir"):

1746

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

2199

1747

value = getattr(options, option)

2200

1748

if value is not None:

2201

1749

server_settings[option] = value

2213

1761

debuglevel = server_settings["debuglevel"]

2214

1762

use_dbus = server_settings["use_dbus"]

2215

1763

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

1764

2228

1765

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

2229

1766

syslogger.setFormatter(logging.Formatter

2230

1767

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

2232

1769

% server_settings["servicename"]))

2233

1770

2234

1771

# Parse config file with clients

2235

client_config = configparser.SafeConfigParser(Client

2236

.client_defaults)

1772

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

1773

"interval": "5m",

1774

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

1775

"host": "",

1776

"approval_delay": "0s",

1777

"approval_duration": "1s",

1778

}

1779

client_config = configparser.SafeConfigParser(client_defaults)

2237

1780

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

2238

1781

"clients.conf"))

2239

1782

2273

1816

try:

2274

1817

os.setgid(gid)

2275

1818

os.setuid(uid)

2276

except OSError as error:

1819

except OSError, error:

2277

1820

if error[0] != errno.EPERM:

2278

1821

raise error

2279

1822

1823

if not debug and not debuglevel:

1824

syslogger.setLevel(logging.WARNING)

1825

console.setLevel(logging.WARNING)

1826

if debuglevel:

1827

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

1828

syslogger.setLevel(level)

1829

console.setLevel(level)

1830

2280

1831

if debug:

2281

1832

# Enable all possible GnuTLS debugging

2282

1833

2292

1843

.gnutls_global_set_log_function(debug_gnutls))

2293

1844

2294

1845

# Redirect stdin so all checkers get /dev/null

2295

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

1846

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

2296

1847

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

2297

1848

if null > 2:

2298

1849

os.close(null)

1850

else:

1851

# No console logging

1852

logger.removeHandler(console)

2299

1853

2300

1854

# Need to fork before connecting to D-Bus

2301

1855

if not debug:

2302

1856

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

2303

1857

daemon()

2304

1858

2305

gobject.threads_init()

2306

2307

1859

global main_loop

2308

1860

# From the Avahi example code

2309

DBusGMainLoop(set_as_default=True)

1861

DBusGMainLoop(set_as_default=True )

2310

1862

main_loop = gobject.MainLoop()

2311

1863

bus = dbus.SystemBus()

2312

1864

# End of Avahi example code

2313

1865

if use_dbus:

2314

1866

try:

2315

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

1867

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

2316

1868

bus, do_not_queue=True)

2317

old_bus_name = (dbus.service.BusName

2318

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

2319

do_not_queue=True))

2320

except dbus.exceptions.NameExistsException as e:

1869

except dbus.exceptions.NameExistsException, e:

2321

1870

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

2322

1871

use_dbus = False

2323

1872

server_settings["use_dbus"] = False

2324

1873

tcp_server.use_dbus = False

2325

1874

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2326

service = AvahiServiceToSyslog(name =

2327

server_settings["servicename"],

2328

servicetype = "_mandos._tcp",

2329

protocol = protocol, bus = bus)

1875

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

1876

servicetype = "_mandos._tcp",

1877

protocol = protocol, bus = bus)

2330

1878

if server_settings["interface"]:

2331

1879

service.interface = (if_nametoindex

2332

1880

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

2336

1884

2337

1885

client_class = Client

2338

1886

if use_dbus:

2339

client_class = functools.partial(ClientDBusTransitional,

2340

bus = bus)

2341

2342

client_settings = Client.config_parser(client_config)

2343

old_client_settings = {}

2344

clients_data = {}

2345

2346

# Get client data and settings from last running state.

2347

if server_settings["restore"]:

2348

try:

2349

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

2350

clients_data, old_client_settings = (pickle.load

2351

(stored_state))

2352

os.remove(stored_state_path)

2353

except IOError as e:

2354

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

2355

.format(e))

2356

if e.errno != errno.ENOENT:

2357

raise

2358

except EOFError as e:

2359

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

2360

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

2361

2362

with PGPEngine() as pgp:

2363

for client_name, client in clients_data.iteritems():

2364

# Decide which value to use after restoring saved state.

2365

# We have three different values: Old config file,

2366

# new config file, and saved state.

2367

# New config value takes precedence if it differs from old

2368

# config value, otherwise use saved state.

2369

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

2370

try:

2371

# For each value in new config, check if it

2372

# differs from the old config value (Except for

2373

# the "secret" attribute)

2374

if (name != "secret" and

2375

value != old_client_settings[client_name]

2376

[name]):

2377

client[name] = value

2378

except KeyError:

2379

pass

2380

2381

# Clients who has passed its expire date can still be

2382

# enabled if its last checker was successful. Clients

2383

# whose checker succeeded before we stored its state is

2384

# assumed to have successfully run all checkers during

2385

# downtime.

2386

if client["enabled"]:

2387

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

2388

if not client["last_checked_ok"]:

2389

logger.warning(

2390

"disabling client {0} - Client never "

2391

"performed a successful checker"

2392

.format(client_name))

2393

client["enabled"] = False

2394

elif client["last_checker_status"] != 0:

2395

logger.warning(

2396

"disabling client {0} - Client "

2397

"last checker failed with error code {1}"

2398

.format(client_name,

2399

client["last_checker_status"]))

2400

client["enabled"] = False

2401

else:

2402

client["expires"] = (datetime.datetime

2403

.utcnow()

2404

+ client["timeout"])

2405

logger.debug("Last checker succeeded,"

2406

" keeping {0} enabled"

2407

.format(client_name))

1887

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

1888

def client_config_items(config, section):

1889

special_settings = {

1890

"approved_by_default":

1891

lambda: config.getboolean(section,

1892

"approved_by_default"),

1893

}

1894

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

2408

1895

try:

2409

client["secret"] = (

2410

pgp.decrypt(client["encrypted_secret"],

2411

client_settings[client_name]

2412

["secret"]))

2413

except PGPError:

2414

# If decryption fails, we use secret from new settings

2415

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

2416

.format(client_name))

2417

client["secret"] = (

2418

client_settings[client_name]["secret"])

2419

2420

2421

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

2422

for client_name in (set(old_client_settings)

2423

- set(client_settings)):

2424

del clients_data[client_name]

2425

for client_name in (set(client_settings)

2426

- set(old_client_settings)):

2427

clients_data[client_name] = client_settings[client_name]

2428

2429

# Create all client objects

2430

for client_name, client in clients_data.iteritems():

2431

tcp_server.clients[client_name] = client_class(

2432

name = client_name, settings = client)

2433

1896

yield (name, special_settings[name]())

1897

except KeyError:

1898

yield (name, value)

1899

1900

tcp_server.clients.update(set(

1901

client_class(name = section,

1902

config= dict(client_config_items(

1903

client_config, section)))

1904

for section in client_config.sections()))

2434

1905

if not tcp_server.clients:

2435

1906

logger.warning("No clients defined")

2436

1907

2447

1918

# "pidfile" was never created

2448

1919

pass

2449

1920

del pidfilename

1921

2450

1922

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

2451

1923

2452

1924

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

2453

1925

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

2454

1926

2455

1927

if use_dbus:

2456

class MandosDBusService(DBusObjectWithProperties):

1928

class MandosDBusService(dbus.service.Object):

2457

1929

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

2458

1930

def __init__(self):

2459

1931

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

2460

_interface = "se.recompile.Mandos"

2461

2462

@dbus_interface_annotations(_interface)

2463

def _foo(self):

2464

return { "org.freedesktop.DBus.Property"

2465

".EmitsChangedSignal":

2466

"false"}

1932

_interface = "se.bsnet.fukt.Mandos"

2467

1933

2468

1934

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

2469

1935

def ClientAdded(self, objpath):

2484

1950

def GetAllClients(self):

2485

1951

"D-Bus method"

2486

1952

return dbus.Array(c.dbus_object_path

2487

for c in

2488

tcp_server.clients.itervalues())

1953

for c in tcp_server.clients)

2489

1954

2490

1955

@dbus.service.method(_interface,

2491

1956

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

2493

1958

"D-Bus method"

2494

1959

return dbus.Dictionary(

2495

1960

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

2496

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

1961

for c in tcp_server.clients),

2497

1962

signature="oa{sv}")

2498

1963

2499

1964

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

2500

1965

def RemoveClient(self, object_path):

2501

1966

"D-Bus method"

2502

for c in tcp_server.clients.itervalues():

1967

for c in tcp_server.clients:

2503

1968

if c.dbus_object_path == object_path:

2504

del tcp_server.clients[c.name]

1969

tcp_server.clients.remove(c)

2505

1970

c.remove_from_connection()

2506

1971

# Don't signal anything except ClientRemoved

2507

1972

c.disable(quiet=True)

2512

1977

2513

1978

del _interface

2514

1979

2515

class MandosDBusServiceTransitional(MandosDBusService):

2516

__metaclass__ = AlternateDBusNamesMetaclass

2517

mandos_dbus_service = MandosDBusServiceTransitional()

1980

mandos_dbus_service = MandosDBusService()

2518

1981

2519

1982

def cleanup():

2520

1983

"Cleanup function; run on exit"

2521

1984

service.cleanup()

2522

1985

2523

multiprocessing.active_children()

2524

if not (tcp_server.clients or client_settings):

2525

return

2526

2527

# Store client before exiting. Secrets are encrypted with key

2528

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

2529

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

2530

clients = {}

2531

with PGPEngine() as pgp:

2532

for client in tcp_server.clients.itervalues():

2533

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

2534

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

2535

key)

2536

client_dict = {}

2537

2538

# A list of attributes that can not be pickled

2539

# + secret.

2540

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

2541

"checker"))

2542

for name, typ in (inspect.getmembers

2543

(dbus.service.Object)):

2544

exclude.add(name)

2545

2546

client_dict["encrypted_secret"] = (client

2547

.encrypted_secret)

2548

for attr in client.client_structure:

2549

if attr not in exclude:

2550

client_dict[attr] = getattr(client, attr)

2551

2552

clients[client.name] = client_dict

2553

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

2554

2555

try:

2556

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

2557

prefix="clients-",

2558

dir=os.path.dirname

2559

(stored_state_path))

2560

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

2561

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

2562

os.rename(tempname, stored_state_path)

2563

except (IOError, OSError) as e:

2564

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

2565

.format(e))

2566

if not debug:

2567

try:

2568

os.remove(tempname)

2569

except NameError:

2570

pass

2571

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

2572

errno.EEXIST)):

2573

raise e

2574

2575

# Delete all clients, and settings from config

2576

1986

while tcp_server.clients:

2577

name, client = tcp_server.clients.popitem()

1987

client = tcp_server.clients.pop()

2578

1988

if use_dbus:

2579

1989

client.remove_from_connection()

1990

client.disable_hook = None

2580

1991

# Don't signal anything except ClientRemoved

2581

1992

client.disable(quiet=True)

2582

1993

if use_dbus:

2583

1994

# Emit D-Bus signal

2584

mandos_dbus_service.ClientRemoved(client

2585

.dbus_object_path,

1995

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2586

1996

client.name)

2587

client_settings.clear()

2588

1997

2589

1998

atexit.register(cleanup)

2590

1999

2591

for client in tcp_server.clients.itervalues():

2000

for client in tcp_server.clients:

2592

2001

if use_dbus:

2593

2002

# Emit D-Bus signal

2594

2003

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2595

# Need to initiate checking of clients

2596

if client.enabled:

2597

client.init_checker()

2004

client.enable()

2598

2005

2599

2006

tcp_server.enable()

2600

2007

tcp_server.server_activate()

2615

2022

# From the Avahi example code

2616

2023

try:

2617

2024

service.activate()

2618

except dbus.exceptions.DBusException as error:

2619

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

2025

except dbus.exceptions.DBusException, error:

2026

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

2620

2027

cleanup()

2621

2028

sys.exit(1)

2622

2029

# End of Avahi example code

2628

2035

2629

2036

logger.debug("Starting main loop")

2630

2037

main_loop.run()

2631

except AvahiError as error:

2632

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

2038

except AvahiError, error:

2039

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

2633

2040

cleanup()

2634

2041

sys.exit(1)

2635

2042

except KeyboardInterrupt: