/mandos/trunk : revision 482

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# "AvahiService" class, and some lines in "main".

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#

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# Everything else is

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#

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# This program is free software: you can redistribute it and/or modify

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# it under the terms of the GNU General Public License as published by

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# along with this program. If not, see

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

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#

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

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

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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import SocketServer as socketserver

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import socket

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import argparse

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import 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 collections

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import dbus

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import dbus.service

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.6.3"

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

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self.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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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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encoded = b"mandos" + binascii.hexlify(password)

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if len(encoded) > 2048:

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# GnuPG can't handle long passwords, so encode differently

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encoded = (b"mandos" + password.replace(b"\\", b"\\\\")

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.replace(b"\n", b"\\n")

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.replace(b"\0", b"\\x00"))

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir=self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir = self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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decrypted_plaintext, err = proc.communicate(input

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= data)

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if proc.returncode != 0:

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raise PGPError(err)

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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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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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def __init__(self, interface = avahi.IF_UNSPEC, name = None,

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servicetype = None, port = None, TXT = None,

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domain = "", host = "", max_renames = 32768,

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

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

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

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self.name)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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def remove(self):

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

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if self.group is not None:

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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException) as e:

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pass

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self.group = None

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match.remove()

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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if self.group is None:

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self.group = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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self.server.EntryGroupNew()),

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.group = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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self.server.EntryGroupNew(),

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follow_name_owner_changes=True),

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self.entry_group_state_changed))

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'StateChanged', self .entry_group_state_changed))

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

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self.name, self.type)

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self.group.AddService(

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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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

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elif state == avahi.ENTRY_GROUP_FAILURE:

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logger.critical("Avahi: Error in group state changed %s",

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unicode(error))

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raise AvahiGroupError("State changed: {0!s}"

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.format(error))

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raise AvahiGroupError("State changed: %s"

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% unicode(error))

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def cleanup(self):

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

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if self.group is not None:

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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException):

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pass

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self.group = None

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self.remove()

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

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

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

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avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

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if state in bad_states:

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if bad_states[state] is not None:

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if error is None:

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logger.error(bad_states[state])

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else:

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

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self.cleanup()

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if bad_states[state]:

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logger.error(bad_states[state])

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self.remove()

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elif state == avahi.SERVER_RUNNING:

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self.add()

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else:

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if error is None:

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

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else:

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

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

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def activate(self):

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

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if self.server is None:

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

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class AvahiServiceToSyslog(AvahiService):

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def rename(self):

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

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ret = AvahiService.rename(self)

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syslogger.setFormatter(logging.Formatter

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

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

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.format(self.name)))

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return ret

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def timedelta_to_milliseconds(td):

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"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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server_settings: The server_settings dict from main()

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"""

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runtime_expansions = ("approval_delay", "approval_duration",

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

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

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"last_approval_request", "last_checked_ok",

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

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

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

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client_defaults = { "timeout": "PT5M",

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"extended_timeout": "PT15M",

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"interval": "PT2M",

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

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"host": "",

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"approval_delay": "PT0S",

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"approval_duration": "PT1S",

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"approved_by_default": "True",

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"enabled": "True",

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}

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@staticmethod

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def _timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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def timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.timeout)

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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.extended_timeout)

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return self._timedelta_to_milliseconds(self.timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return timedelta_to_milliseconds(self.interval)

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return self._timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

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return timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

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def config_parser(config):

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

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

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with exceptions for any special settings as defined above.

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

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value given the same arguments.

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"""

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settings = {}

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for client_name in config.sections():

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section = dict(config.items(client_name))

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client = settings[client_name] = {}

495

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

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# Reformat values from string types to Python types

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client["approved_by_default"] = config.getboolean(

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client_name, "approved_by_default")

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

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"enabled")

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

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.replace(" ", ""))

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if "secret" in section:

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

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elif "secfile" in section:

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

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(section["secfile"])),

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"rb") as secfile:

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

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else:

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

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.format(section))

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

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client["extended_timeout"] = string_to_delta(

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section["extended_timeout"])

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

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client["approval_delay"] = string_to_delta(

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section["approval_delay"])

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client["approval_duration"] = string_to_delta(

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section["approval_duration"])

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

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client["last_approval_request"] = None

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client["last_checked_ok"] = None

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client["last_checker_status"] = -2

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return settings

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

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return self._timedelta_to_milliseconds(self.approval_delay)

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

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

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

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attribute."""

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self.name = name

532

if server_settings is None:

533

server_settings = {}

534

self.server_settings = server_settings

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# adding all client settings

536

for setting, value in settings.iteritems():

537

setattr(self, setting, value)

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if self.enabled:

540

if not hasattr(self, "last_enabled"):

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self.last_enabled = datetime.datetime.utcnow()

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if not hasattr(self, "expires"):

543

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

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+ self.timeout)

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else:

546

self.last_enabled = None

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self.expires = None

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if config is None:

324

config = {}

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

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# Uppercase and remove spaces from fingerprint for later

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# comparison purposes with return value from the fingerprint()

552

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# function

329

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

330

.replace(" ", ""))

553

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

554

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

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datetime.datetime.utcnow())

556

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# attributes specific for this server instance

332

if "secret" in config:

333

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

334

elif "secfile" in config:

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

336

(config["secfile"])),

337

"rb") as secfile:

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self.secret = secfile.read()

339

else:

340

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

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% self.name)

342

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

343

self.created = datetime.datetime.utcnow()

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self.enabled = False

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self.last_approval_request = None

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self.last_enabled = None

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self.last_checked_ok = None

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

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

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self.disable_hook = disable_hook

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self.checker = None

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self.checker_initiator_tag = None

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self.disable_initiator_tag = None

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self.checker_callback_tag = None

355

self.checker_command = config["checker"]

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self.current_checker_command = None

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self.approved = None

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self.last_connect = None

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self._approved = None

359

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

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True)

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self.approvals_pending = 0

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self.changedstate = (multiprocessing_manager

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.Condition(multiprocessing_manager

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.Lock()))

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self.client_structure = [attr for attr in

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self.__dict__.iterkeys()

570

if not attr.startswith("_")]

571

self.client_structure.append("client_structure")

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

574

lambda obj:

575

isinstance(obj,

576

property)):

577

if not name.startswith("_"):

578

self.client_structure.append(name)

362

self.approval_delay = string_to_delta(

363

config["approval_delay"])

364

self.approval_duration = string_to_delta(

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config["approval_duration"])

366

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

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# Send notice to process children that client state has changed

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368

def send_changedstate(self):

582

with self.changedstate:

583

self.changedstate.notify_all()

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369

self.changedstate.acquire()

370

self.changedstate.notify_all()

371

self.changedstate.release()

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def enable(self):

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

587

375

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

588

376

# Already enabled

589

377

return

590

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

591

self.enabled = True

378

self.send_changedstate()

592

379

self.last_enabled = datetime.datetime.utcnow()

593

self.init_checker()

594

self.send_changedstate()

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def disable(self, quiet=True):

597

"""Disable this client."""

598

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

599

return False

600

if not quiet:

601

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

602

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

603

gobject.source_remove(self.disable_initiator_tag)

604

self.disable_initiator_tag = None

605

self.expires = None

606

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

607

gobject.source_remove(self.checker_initiator_tag)

608

self.checker_initiator_tag = None

609

self.stop_checker()

610

self.enabled = False

611

if not quiet:

612

self.send_changedstate()

613

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

614

return False

615

616

def __del__(self):

617

self.disable()

618

619

def init_checker(self):

620

380

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

621

381

# and every interval from then on.

622

if self.checker_initiator_tag is not None:

623

gobject.source_remove(self.checker_initiator_tag)

624

382

self.checker_initiator_tag = (gobject.timeout_add

625

383

(self.interval_milliseconds(),

626

384

self.start_checker))

627

385

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

628

if self.disable_initiator_tag is not None:

629

gobject.source_remove(self.disable_initiator_tag)

630

386

self.disable_initiator_tag = (gobject.timeout_add

631

387

(self.timeout_milliseconds(),

632

388

self.disable))

389

self.enabled = True

633

390

# Also start a new checker *right now*.

634

391

self.start_checker()

635

392

393

def disable(self, quiet=True):

394

"""Disable this client."""

395

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

396

return False

397

if not quiet:

398

self.send_changedstate()

399

if not quiet:

400

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

401

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

402

gobject.source_remove(self.disable_initiator_tag)

403

self.disable_initiator_tag = None

404

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

405

gobject.source_remove(self.checker_initiator_tag)

406

self.checker_initiator_tag = None

407

self.stop_checker()

408

if self.disable_hook:

409

self.disable_hook(self)

410

self.enabled = False

411

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

412

return False

413

414

def __del__(self):

415

self.disable_hook = None

416

self.disable()

417

636

418

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

637

419

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

638

420

self.checker_callback_tag = None

639

421

self.checker = None

640

422

if os.WIFEXITED(condition):

641

self.last_checker_status = os.WEXITSTATUS(condition)

642

if self.last_checker_status == 0:

423

exitstatus = os.WEXITSTATUS(condition)

424

if exitstatus == 0:

643

425

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

644

426

vars(self))

645

427

self.checked_ok()

647

429

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

648

430

vars(self))

649

431

else:

650

self.last_checker_status = -1

651

432

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

652

433

vars(self))

653

434

654

435

def checked_ok(self):

655

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

436

"""Bump up the timeout for this client.

437

438

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

439

alive and well.

440

"""

656

441

self.last_checked_ok = datetime.datetime.utcnow()

657

self.last_checker_status = 0

658

self.bump_timeout()

659

660

def bump_timeout(self, timeout=None):

661

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

662

if timeout is None:

663

timeout = self.timeout

664

if self.disable_initiator_tag is not None:

665

gobject.source_remove(self.disable_initiator_tag)

666

self.disable_initiator_tag = None

667

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

668

self.disable_initiator_tag = (gobject.timeout_add

669

(timedelta_to_milliseconds

670

(timeout), self.disable))

671

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

442

gobject.source_remove(self.disable_initiator_tag)

443

self.disable_initiator_tag = (gobject.timeout_add

444

(self.timeout_milliseconds(),

445

self.disable))

672

446

673

447

def need_approval(self):

674

448

self.last_approval_request = datetime.datetime.utcnow()

679

453

If a checker already exists, leave it running and do

680

454

nothing."""

681

455

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

682

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

683

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

684

# would inevitably timeout, since no checker would get a

685

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

456

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

457

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

458

# client would inevitably timeout, since no checker would get

459

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

686

460

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

687

461

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

688

462

# should be.

690

464

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

691

465

try:

692

466

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

693

except AttributeError:

694

pass

695

except OSError as error:

696

if error.errno != errno.ECHILD:

697

raise

467

except (AttributeError, OSError) as error:

468

if (isinstance(error, OSError)

469

and error.errno != errno.ECHILD):

470

raise error

698

471

else:

699

472

if pid:

700

473

logger.warning("Checker was a zombie")

703

476

self.current_checker_command)

704

477

# Start a new checker if needed

705

478

if self.checker is None:

706

# Escape attributes for the shell

707

escaped_attrs = dict(

708

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

709

for attr in

710

self.runtime_expansions)

711

479

try:

712

command = self.checker_command % escaped_attrs

713

except TypeError as error:

714

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

715

self.checker_command, exc_info=error)

716

return True # Try again later

480

# In case checker_command has exactly one % operator

481

command = self.checker_command % self.host

482

except TypeError:

483

# Escape attributes for the shell

484

escaped_attrs = dict(

485

(attr,

486

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

487

errors=

488

'replace')))

489

for attr in

490

self.runtime_expansions)

491

492

try:

493

command = self.checker_command % escaped_attrs

494

except TypeError as error:

495

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

496

' %s', self.checker_command, error)

497

return True # Try again later

717

498

self.current_checker_command = command

718

499

try:

719

500

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

722

503

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

723

504

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

724

505

# always replaced by /dev/null.)

725

# The exception is when not debugging but nevertheless

726

# running in the foreground; use the previously

727

# created wnull.

728

popen_args = {}

729

if (not self.server_settings["debug"]

730

and self.server_settings["foreground"]):

731

popen_args.update({"stdout": wnull,

732

"stderr": wnull })

733

506

self.checker = subprocess.Popen(command,

734

507

close_fds=True,

735

shell=True, cwd="/",

736

**popen_args)

737

except OSError as error:

738

logger.error("Failed to start subprocess",

739

exc_info=error)

740

return True

741

self.checker_callback_tag = (gobject.child_watch_add

742

(self.checker.pid,

743

self.checker_callback,

744

data=command))

745

# The checker may have completed before the gobject

746

# watch was added. Check for this.

747

try:

508

shell=True, cwd="/")

509

self.checker_callback_tag = (gobject.child_watch_add

510

(self.checker.pid,

511

self.checker_callback,

512

data=command))

513

# The checker may have completed before the gobject

514

# watch was added. Check for this.

748

515

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

516

if pid:

517

gobject.source_remove(self.checker_callback_tag)

518

self.checker_callback(pid, status, command)

749

519

except OSError as error:

750

if error.errno == errno.ECHILD:

751

# This should never happen

752

logger.error("Child process vanished",

753

exc_info=error)

754

return True

755

raise

756

if pid:

757

gobject.source_remove(self.checker_callback_tag)

758

self.checker_callback(pid, status, command)

520

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

521

error)

759

522

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

760

523

return True

761

524

768

531

return

769

532

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

770

533

try:

771

self.checker.terminate()

534

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

772

535

#time.sleep(0.5)

773

536

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

774

# self.checker.kill()

537

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

775

538

except OSError as error:

776

539

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

777

540

raise

778

541

self.checker = None

779

542

780

781

543

def dbus_service_property(dbus_interface, signature="v",

782

544

access="readwrite", byte_arrays=False):

783

545

"""Decorators for marking methods of a DBusObjectWithProperties to

794

556

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

795

557

if byte_arrays and signature != "ay":

796

558

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

797

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

559

" signature %r" % signature)

798

560

def decorator(func):

799

561

func._dbus_is_property = True

800

562

func._dbus_interface = dbus_interface

808

570

return decorator

809

571

810

572

811

def dbus_interface_annotations(dbus_interface):

812

"""Decorator for marking functions returning interface annotations

813

814

Usage:

815

816

@dbus_interface_annotations("org.example.Interface")

817

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

818

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

819

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

820

"false"}

821

"""

822

def decorator(func):

823

func._dbus_is_interface = True

824

func._dbus_interface = dbus_interface

825

func._dbus_name = dbus_interface

826

return func

827

return decorator

828

829

830

def dbus_annotations(annotations):

831

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

832

Usage:

833

834

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

835

access="r")

836

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

837

"org.freedesktop.DBus.Property."

838

"EmitsChangedSignal": "false"})

839

def Property_dbus_property(self):

840

return dbus.Boolean(False)

841

"""

842

def decorator(func):

843

func._dbus_annotations = annotations

844

return func

845

return decorator

846

847

848

573

class DBusPropertyException(dbus.exceptions.DBusException):

849

574

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

850

575

"""

866

591

867

592

class DBusObjectWithProperties(dbus.service.Object):

868

593

"""A D-Bus object with properties.

869

594

870

595

Classes inheriting from this can use the dbus_service_property

871

596

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

872

597

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

873

598

"""

874

599

875

600

@staticmethod

876

def _is_dbus_thing(thing):

877

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

878

879

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

880

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

881

"""

882

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

883

False)

601

def _is_dbus_property(obj):

602

return getattr(obj, "_dbus_is_property", False)

884

603

885

def _get_all_dbus_things(self, thing):

604

def _get_all_dbus_properties(self):

886

605

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

887

606

"""

888

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

889

name),

890

athing.__get__(self))

891

for cls in self.__class__.__mro__

892

for name, athing in

893

inspect.getmembers(cls,

894

self._is_dbus_thing(thing)))

607

return ((prop._dbus_name, prop)

608

for name, prop in

609

inspect.getmembers(self, self._is_dbus_property))

895

610

896

611

def _get_dbus_property(self, interface_name, property_name):

897

612

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

898

613

property with the specified name and interface.

899

614

"""

900

for cls in self.__class__.__mro__:

901

for name, value in (inspect.getmembers

902

(cls,

903

self._is_dbus_thing("property"))):

904

if (value._dbus_name == property_name

905

and value._dbus_interface == interface_name):

906

return value.__get__(self)

907

615

for name in (property_name,

616

property_name + "_dbus_property"):

617

prop = getattr(self, name, None)

618

if (prop is None

619

or not self._is_dbus_property(prop)

620

or prop._dbus_name != property_name

621

or (interface_name and prop._dbus_interface

622

and interface_name != prop._dbus_interface)):

623

continue

624

return prop

908

625

# No such property

909

626

raise DBusPropertyNotFound(self.dbus_object_path + ":"

910

627

+ interface_name + "."

934

651

# The byte_arrays option is not supported yet on

935

652

# signatures other than "ay".

936

653

if prop._dbus_signature != "ay":

937

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

938

"'ay' signature {0!r}"

939

.format(prop._dbus_signature))

940

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

941

for byte in value))

654

raise ValueError

655

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

656

for byte in value))

942

657

prop(value)

943

658

944

659

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

946

661

def GetAll(self, interface_name):

947

662

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

948

663

standard.

949

664

950

665

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

951

666

"""

952

properties = {}

953

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

667

all = {}

668

for name, prop in self._get_all_dbus_properties():

954

669

if (interface_name

955

670

and interface_name != prop._dbus_interface):

956

671

# Interface non-empty but did not match

960

675

continue

961

676

value = prop()

962

677

if not hasattr(value, "variant_level"):

963

properties[name] = value

678

all[name] = value

964

679

continue

965

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

966

value.variant_level+1)

967

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

680

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

681

value.variant_level+1)

682

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

968

683

969

684

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

970

685

out_signature="s",

971

686

path_keyword='object_path',

972

687

connection_keyword='connection')

973

688

def Introspect(self, object_path, connection):

974

"""Overloading of standard D-Bus method.

975

976

Inserts property tags and interface annotation tags.

689

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

977

690

"""

978

691

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

979

692

connection)

986

699

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

987

700

return e

988

701

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

989

# Add property tags

990

702

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

991

703

for name, prop

992

in self._get_all_dbus_things("property")

704

in self._get_all_dbus_properties()

993

705

if prop._dbus_interface

994

706

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

995

707

if_tag.appendChild(tag)

996

# Add annotation tags

997

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

998

for tag in if_tag.getElementsByTagName(typ):

999

annots = dict()

1000

for name, prop in (self.

1001

_get_all_dbus_things(typ)):

1002

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

1003

and prop._dbus_interface

1004

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

1005

annots.update(getattr

1006

(prop,

1007

"_dbus_annotations",

1008

{}))

1009

for name, value in annots.iteritems():

1010

ann_tag = document.createElement(

1011

"annotation")

1012

ann_tag.setAttribute("name", name)

1013

ann_tag.setAttribute("value", value)

1014

tag.appendChild(ann_tag)

1015

# Add interface annotation tags

1016

for annotation, value in dict(

1017

itertools.chain.from_iterable(

1018

annotations().iteritems()

1019

for name, annotations in

1020

self._get_all_dbus_things("interface")

1021

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

1022

)).iteritems():

1023

ann_tag = document.createElement("annotation")

1024

ann_tag.setAttribute("name", annotation)

1025

ann_tag.setAttribute("value", value)

1026

if_tag.appendChild(ann_tag)

1027

708

# Add the names to the return values for the

1028

709

# "org.freedesktop.DBus.Properties" methods

1029

710

if (if_tag.getAttribute("name")

1044

725

except (AttributeError, xml.dom.DOMException,

1045

726

xml.parsers.expat.ExpatError) as error:

1046

727

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

1047

exc_info=error)

728

error)

1048

729

return xmlstring

1049

730

1050

731

1051

def datetime_to_dbus(dt, variant_level=0):

1052

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

1053

if dt is None:

1054

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

1055

return dbus.String(dt.isoformat(),

1056

variant_level=variant_level)

1057

1058

1059

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1060

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

1061

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

1062

interface names according to the "alt_interface_names" mapping.

1063

Usage:

1064

1065

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

1066

"net.example.AlternateInterface"})

1067

class SampleDBusObject(dbus.service.Object):

1068

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

1069

def SampleDBusMethod():

1070

pass

1071

1072

The above "SampleDBusMethod" on "SampleDBusObject" will be

1073

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

1074

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

1075

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

1076

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

1077

1078

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

1079

(from DBusObjectWithProperties) and interfaces (from the

1080

dbus_interface_annotations decorator).

1081

"""

1082

def wrapper(cls):

1083

for orig_interface_name, alt_interface_name in (

1084

alt_interface_names.iteritems()):

1085

attr = {}

1086

interface_names = set()

1087

# Go though all attributes of the class

1088

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

1089

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

1090

# with the wrong interface name

1091

if (not hasattr(attribute, "_dbus_interface")

1092

or not attribute._dbus_interface

1093

.startswith(orig_interface_name)):

1094

continue

1095

# Create an alternate D-Bus interface name based on

1096

# the current name

1097

alt_interface = (attribute._dbus_interface

1098

.replace(orig_interface_name,

1099

alt_interface_name))

1100

interface_names.add(alt_interface)

1101

# Is this a D-Bus signal?

1102

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

1103

# Extract the original non-method undecorated

1104

# function by black magic

1105

nonmethod_func = (dict(

1106

zip(attribute.func_code.co_freevars,

1107

attribute.__closure__))["func"]

1108

.cell_contents)

1109

# Create a new, but exactly alike, function

1110

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

1111

# with the alternate D-Bus interface name

1112

new_function = (dbus.service.signal

1113

(alt_interface,

1114

attribute._dbus_signature)

1115

(types.FunctionType(

1116

nonmethod_func.func_code,

1117

nonmethod_func.func_globals,

1118

nonmethod_func.func_name,

1119

nonmethod_func.func_defaults,

1120

nonmethod_func.func_closure)))

1121

# Copy annotations, if any

1122

try:

1123

new_function._dbus_annotations = (

1124

dict(attribute._dbus_annotations))

1125

except AttributeError:

1126

pass

1127

# Define a creator of a function to call both the

1128

# original and alternate functions, so both the

1129

# original and alternate signals gets sent when

1130

# the function is called

1131

def fixscope(func1, func2):

1132

"""This function is a scope container to pass

1133

func1 and func2 to the "call_both" function

1134

outside of its arguments"""

1135

def call_both(*args, **kwargs):

1136

"""This function will emit two D-Bus

1137

signals by calling func1 and func2"""

1138

func1(*args, **kwargs)

1139

func2(*args, **kwargs)

1140

return call_both

1141

# Create the "call_both" function and add it to

1142

# the class

1143

attr[attrname] = fixscope(attribute, new_function)

1144

# Is this a D-Bus method?

1145

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

1146

# Create a new, but exactly alike, function

1147

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

1148

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

1149

# to the class.

1150

attr[attrname] = (dbus.service.method

1151

(alt_interface,

1152

attribute._dbus_in_signature,

1153

attribute._dbus_out_signature)

1154

(types.FunctionType

1155

(attribute.func_code,

1156

attribute.func_globals,

1157

attribute.func_name,

1158

attribute.func_defaults,

1159

attribute.func_closure)))

1160

# Copy annotations, if any

1161

try:

1162

attr[attrname]._dbus_annotations = (

1163

dict(attribute._dbus_annotations))

1164

except AttributeError:

1165

pass

1166

# Is this a D-Bus property?

1167

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

1168

# Create a new, but exactly alike, function

1169

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

1170

# property with the alternate D-Bus interface

1171

# name. Add it to the class.

1172

attr[attrname] = (dbus_service_property

1173

(alt_interface,

1174

attribute._dbus_signature,

1175

attribute._dbus_access,

1176

attribute

1177

._dbus_get_args_options

1178

["byte_arrays"])

1179

(types.FunctionType

1180

(attribute.func_code,

1181

attribute.func_globals,

1182

attribute.func_name,

1183

attribute.func_defaults,

1184

attribute.func_closure)))

1185

# Copy annotations, if any

1186

try:

1187

attr[attrname]._dbus_annotations = (

1188

dict(attribute._dbus_annotations))

1189

except AttributeError:

1190

pass

1191

# Is this a D-Bus interface?

1192

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

1193

# Create a new, but exactly alike, function

1194

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

1195

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

1196

# to the class.

1197

attr[attrname] = (dbus_interface_annotations

1198

(alt_interface)

1199

(types.FunctionType

1200

(attribute.func_code,

1201

attribute.func_globals,

1202

attribute.func_name,

1203

attribute.func_defaults,

1204

attribute.func_closure)))

1205

if deprecate:

1206

# Deprecate all alternate interfaces

1207

iname="_AlternateDBusNames_interface_annotation{0}"

1208

for interface_name in interface_names:

1209

@dbus_interface_annotations(interface_name)

1210

def func(self):

1211

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

1212

"true" }

1213

# Find an unused name

1214

for aname in (iname.format(i)

1215

for i in itertools.count()):

1216

if aname not in attr:

1217

attr[aname] = func

1218

break

1219

if interface_names:

1220

# Replace the class with a new subclass of it with

1221

# methods, signals, etc. as created above.

1222

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

1223

(cls,), attr)

1224

return cls

1225

return wrapper

1226

1227

1228

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

1229

"se.bsnet.fukt.Mandos"})

1230

732

class ClientDBus(Client, DBusObjectWithProperties):

1231

733

"""A Client class using D-Bus

1232

734

1241

743

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

1242

744

1243

745

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

746

self._approvals_pending = 0

1244

747

self.bus = bus

1245

748

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

1246

749

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

1252

755

("/clients/" + client_object_name))

1253

756

DBusObjectWithProperties.__init__(self, self.bus,

1254

757

self.dbus_object_path)

1255

1256

def notifychangeproperty(transform_func,

1257

dbus_name, type_func=lambda x: x,

1258

variant_level=1):

1259

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

1260

its changes to DBus.

1261

1262

transform_fun: Function that takes a value and a variant_level

1263

and transforms it to a D-Bus type.

1264

dbus_name: D-Bus name of the variable

1265

type_func: Function that transform the value before sending it

1266

to the D-Bus. Default: no transform

1267

variant_level: D-Bus variant level. Default: 1

1268

"""

1269

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

1270

def setter(self, value):

1271

if hasattr(self, "dbus_object_path"):

1272

if (not hasattr(self, attrname) or

1273

type_func(getattr(self, attrname, None))

1274

!= type_func(value)):

1275

dbus_value = transform_func(type_func(value),

1276

variant_level

1277

=variant_level)

1278

self.PropertyChanged(dbus.String(dbus_name),

1279

dbus_value)

1280

setattr(self, attrname, value)

1281

1282

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

1283

1284

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1285

approvals_pending = notifychangeproperty(dbus.Boolean,

1286

"ApprovalPending",

1287

type_func = bool)

1288

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

1289

last_enabled = notifychangeproperty(datetime_to_dbus,

1290

"LastEnabled")

1291

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

1292

type_func = lambda checker:

1293

checker is not None)

1294

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1295

"LastCheckedOK")

1296

last_checker_status = notifychangeproperty(dbus.Int16,

1297

"LastCheckerStatus")

1298

last_approval_request = notifychangeproperty(

1299

datetime_to_dbus, "LastApprovalRequest")

1300

approved_by_default = notifychangeproperty(dbus.Boolean,

1301

"ApprovedByDefault")

1302

approval_delay = notifychangeproperty(dbus.UInt64,

1303

"ApprovalDelay",

1304

type_func =

1305

timedelta_to_milliseconds)

1306

approval_duration = notifychangeproperty(

1307

dbus.UInt64, "ApprovalDuration",

1308

type_func = timedelta_to_milliseconds)

1309

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

1310

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

1311

type_func =

1312

timedelta_to_milliseconds)

1313

extended_timeout = notifychangeproperty(

1314

dbus.UInt64, "ExtendedTimeout",

1315

type_func = timedelta_to_milliseconds)

1316

interval = notifychangeproperty(dbus.UInt64,

1317

"Interval",

1318

type_func =

1319

timedelta_to_milliseconds)

1320

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

1321

1322

del notifychangeproperty

758

759

def _get_approvals_pending(self):

760

return self._approvals_pending

761

def _set_approvals_pending(self, value):

762

old_value = self._approvals_pending

763

self._approvals_pending = value

764

bval = bool(value)

765

if (hasattr(self, "dbus_object_path")

766

and bval is not bool(old_value)):

767

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

768

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

769

dbus_bool)

770

771

approvals_pending = property(_get_approvals_pending,

772

_set_approvals_pending)

773

del _get_approvals_pending, _set_approvals_pending

774

775

@staticmethod

776

def _datetime_to_dbus(dt, variant_level=0):

777

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

778

return dbus.String(dt.isoformat(),

779

variant_level=variant_level)

780

781

def enable(self):

782

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

783

r = Client.enable(self)

784

if oldstate != self.enabled:

785

# Emit D-Bus signals

786

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

787

dbus.Boolean(True, variant_level=1))

788

self.PropertyChanged(

789

dbus.String("LastEnabled"),

790

self._datetime_to_dbus(self.last_enabled,

791

variant_level=1))

792

return r

793

794

def disable(self, quiet = False):

795

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

796

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

797

if not quiet and oldstate != self.enabled:

798

# Emit D-Bus signal

799

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

800

dbus.Boolean(False, variant_level=1))

801

return r

1323

802

1324

803

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

1325

804

try:

1334

813

*args, **kwargs):

1335

814

self.checker_callback_tag = None

1336

815

self.checker = None

816

# Emit D-Bus signal

817

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

818

dbus.Boolean(False, variant_level=1))

1337

819

if os.WIFEXITED(condition):

1338

820

exitstatus = os.WEXITSTATUS(condition)

1339

821

# Emit D-Bus signal

1349

831

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

1350

832

*args, **kwargs)

1351

833

834

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

835

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

836

# Emit D-Bus signal

837

self.PropertyChanged(

838

dbus.String("LastCheckedOK"),

839

(self._datetime_to_dbus(self.last_checked_ok,

840

variant_level=1)))

841

842

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

843

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

844

# Emit D-Bus signal

845

self.PropertyChanged(

846

dbus.String("LastApprovalRequest"),

847

(self._datetime_to_dbus(self.last_approval_request,

848

variant_level=1)))

849

return r

850

1352

851

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

1353

852

old_checker = self.checker

1354

853

if self.checker is not None:

1361

860

and old_checker_pid != self.checker.pid):

1362

861

# Emit D-Bus signal

1363

862

self.CheckerStarted(self.current_checker_command)

863

self.PropertyChanged(

864

dbus.String("CheckerRunning"),

865

dbus.Boolean(True, variant_level=1))

1364

866

return r

1365

867

868

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

869

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

870

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

871

if (old_checker is not None

872

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

873

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

874

dbus.Boolean(False, variant_level=1))

875

return r

876

1366

877

def _reset_approved(self):

1367

self.approved = None

878

self._approved = None

1368

879

return False

1369

880

1370

881

def approve(self, value=True):

1371

self.approved = value

1372

gobject.timeout_add(timedelta_to_milliseconds

882

self.send_changedstate()

883

self._approved = value

884

gobject.timeout_add(self._timedelta_to_milliseconds

1373

885

(self.approval_duration),

1374

886

self._reset_approved)

1375

self.send_changedstate()

887

1376

888

1377

889

## D-Bus methods, signals & properties

1378

_interface = "se.recompile.Mandos.Client"

1379

1380

## Interfaces

1381

1382

@dbus_interface_annotations(_interface)

1383

def _foo(self):

1384

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

1385

"false"}

890

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

1386

891

1387

892

## Signals

1388

893

1474

979

if value is None: # get

1475

980

return dbus.Boolean(self.approved_by_default)

1476

981

self.approved_by_default = bool(value)

982

# Emit D-Bus signal

983

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

984

dbus.Boolean(value, variant_level=1))

1477

985

1478

986

# ApprovalDelay - property

1479

987

@dbus_service_property(_interface, signature="t",

1482

990

if value is None: # get

1483

991

return dbus.UInt64(self.approval_delay_milliseconds())

1484

992

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

993

# Emit D-Bus signal

994

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

995

dbus.UInt64(value, variant_level=1))

1485

996

1486

997

# ApprovalDuration - property

1487

998

@dbus_service_property(_interface, signature="t",

1488

999

access="readwrite")

1489

1000

def ApprovalDuration_dbus_property(self, value=None):

1490

1001

if value is None: # get

1491

return dbus.UInt64(timedelta_to_milliseconds(

1002

return dbus.UInt64(self._timedelta_to_milliseconds(

1492

1003

self.approval_duration))

1493

1004

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

1005

# Emit D-Bus signal

1006

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

1007

dbus.UInt64(value, variant_level=1))

1494

1008

1495

1009

# Name - property

1496

1010

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

1508

1022

def Host_dbus_property(self, value=None):

1509

1023

if value is None: # get

1510

1024

return dbus.String(self.host)

1511

self.host = unicode(value)

1025

self.host = value

1026

# Emit D-Bus signal

1027

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

1028

dbus.String(value, variant_level=1))

1512

1029

1513

1030

# Created - property

1514

1031

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

1515

1032

def Created_dbus_property(self):

1516

return datetime_to_dbus(self.created)

1033

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

1517

1034

1518

1035

# LastEnabled - property

1519

1036

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

1520

1037

def LastEnabled_dbus_property(self):

1521

return datetime_to_dbus(self.last_enabled)

1038

if self.last_enabled is None:

1039

return dbus.String("")

1040

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

1522

1041

1523

1042

# Enabled - property

1524

1043

@dbus_service_property(_interface, signature="b",

1538

1057

if value is not None:

1539

1058

self.checked_ok()

1540

1059

return

1541

return datetime_to_dbus(self.last_checked_ok)

1542

1543

# LastCheckerStatus - property

1544

@dbus_service_property(_interface, signature="n",

1545

access="read")

1546

def LastCheckerStatus_dbus_property(self):

1547

return dbus.Int16(self.last_checker_status)

1548

1549

# Expires - property

1550

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

1551

def Expires_dbus_property(self):

1552

return datetime_to_dbus(self.expires)

1060

if self.last_checked_ok is None:

1061

return dbus.String("")

1062

return dbus.String(self._datetime_to_dbus(self

1063

.last_checked_ok))

1553

1064

1554

1065

# LastApprovalRequest - property

1555

1066

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

1556

1067

def LastApprovalRequest_dbus_property(self):

1557

return datetime_to_dbus(self.last_approval_request)

1068

if self.last_approval_request is None:

1069

return dbus.String("")

1070

return dbus.String(self.

1071

_datetime_to_dbus(self

1072

.last_approval_request))

1558

1073

1559

1074

# Timeout - property

1560

1075

@dbus_service_property(_interface, signature="t",

1562

1077

def Timeout_dbus_property(self, value=None):

1563

1078

if value is None: # get

1564

1079

return dbus.UInt64(self.timeout_milliseconds())

1565

old_timeout = self.timeout

1566

1080

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

1567

# Reschedule disabling

1568

if self.enabled:

1569

now = datetime.datetime.utcnow()

1570

self.expires += self.timeout - old_timeout

1571

if self.expires <= now:

1572

# The timeout has passed

1573

self.disable()

1574

else:

1575

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

1576

is None):

1577

return

1578

gobject.source_remove(self.disable_initiator_tag)

1579

self.disable_initiator_tag = (

1580

gobject.timeout_add(

1581

timedelta_to_milliseconds(self.expires - now),

1582

self.disable))

1583

1584

# ExtendedTimeout - property

1585

@dbus_service_property(_interface, signature="t",

1586

access="readwrite")

1587

def ExtendedTimeout_dbus_property(self, value=None):

1588

if value is None: # get

1589

return dbus.UInt64(self.extended_timeout_milliseconds())

1590

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

1081

# Emit D-Bus signal

1082

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

1083

dbus.UInt64(value, variant_level=1))

1084

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

1085

return

1086

# Reschedule timeout

1087

gobject.source_remove(self.disable_initiator_tag)

1088

self.disable_initiator_tag = None

1089

time_to_die = (self.

1090

_timedelta_to_milliseconds((self

1091

.last_checked_ok

1092

+ self.timeout)

1093

- datetime.datetime

1094

.utcnow()))

1095

if time_to_die <= 0:

1096

# The timeout has passed

1097

self.disable()

1098

else:

1099

self.disable_initiator_tag = (gobject.timeout_add

1100

(time_to_die, self.disable))

1591

1101

1592

1102

# Interval - property

1593

1103

@dbus_service_property(_interface, signature="t",

1596

1106

if value is None: # get

1597

1107

return dbus.UInt64(self.interval_milliseconds())

1598

1108

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

1109

# Emit D-Bus signal

1110

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

1111

dbus.UInt64(value, variant_level=1))

1599

1112

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

1600

1113

return

1601

if self.enabled:

1602

# Reschedule checker run

1603

gobject.source_remove(self.checker_initiator_tag)

1604

self.checker_initiator_tag = (gobject.timeout_add

1605

(value, self.start_checker))

1606

self.start_checker() # Start one now, too

1607

1114

# Reschedule checker run

1115

gobject.source_remove(self.checker_initiator_tag)

1116

self.checker_initiator_tag = (gobject.timeout_add

1117

(value, self.start_checker))

1118

self.start_checker() # Start one now, too

1119

1608

1120

# Checker - property

1609

1121

@dbus_service_property(_interface, signature="s",

1610

1122

access="readwrite")

1611

1123

def Checker_dbus_property(self, value=None):

1612

1124

if value is None: # get

1613

1125

return dbus.String(self.checker_command)

1614

self.checker_command = unicode(value)

1126

self.checker_command = value

1127

# Emit D-Bus signal

1128

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

1129

dbus.String(self.checker_command,

1130

variant_level=1))

1615

1131

1616

1132

# CheckerRunning - property

1617

1133

@dbus_service_property(_interface, signature="b",

1644

1160

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

1645

1161

if not self._pipe.recv():

1646

1162

raise KeyError()

1647

1163

1648

1164

def __getattribute__(self, name):

1649

if name == '_pipe':

1165

if(name == '_pipe'):

1650

1166

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

1651

1167

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

1652

1168

data = self._pipe.recv()

1657

1173

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

1658

1174

return self._pipe.recv()[1]

1659

1175

return func

1660

1176

1661

1177

def __setattr__(self, name, value):

1662

if name == '_pipe':

1178

if(name == '_pipe'):

1663

1179

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

1664

1180

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

1665

1181

1676

1192

unicode(self.client_address))

1677

1193

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

1678

1194

self.server.child_pipe.fileno())

1679

1195

1680

1196

session = (gnutls.connection

1681

1197

.ClientSession(self.request,

1682

1198

gnutls.connection

1683

1199

.X509Credentials()))

1684

1200

1685

1201

# Note: gnutls.connection.X509Credentials is really a

1686

1202

# generic GnuTLS certificate credentials object so long as

1687

1203

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

1688

1204

# here despite using OpenPGP certificates.

1689

1205

1690

1206

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

1691

1207

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

1692

1208

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

1698

1214

(gnutls.library.functions

1699

1215

.gnutls_priority_set_direct(session._c_object,

1700

1216

priority, None))

1701

1217

1702

1218

# Start communication using the Mandos protocol

1703

1219

# Get protocol number

1704

1220

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

1705

1221

logger.debug("Protocol version: %r", line)

1706

1222

try:

1707

1223

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

1708

raise RuntimeError(line)

1224

raise RuntimeError

1709

1225

except (ValueError, IndexError, RuntimeError) as error:

1710

1226

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

1711

1227

return

1712

1228

1713

1229

# Start GnuTLS connection

1714

1230

try:

1715

1231

session.handshake()

1719

1235

# established. Just abandon the request.

1720

1236

return

1721

1237

logger.debug("Handshake succeeded")

1722

1238

1723

1239

approval_required = False

1724

1240

try:

1725

1241

try:

1730

1246

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

1731

1247

return

1732

1248

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

1733

1249

1734

1250

try:

1735

1251

client = ProxyClient(child_pipe, fpr,

1736

1252

self.client_address)

1744

1260

1745

1261

while True:

1746

1262

if not client.enabled:

1747

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

1263

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

1748

1264

client.name)

1749

1265

if self.server.use_dbus:

1750

1266

# Emit D-Bus signal

1751

client.Rejected("Disabled")

1267

client.Rejected("Disabled")

1752

1268

return

1753

1269

1754

if client.approved or not client.approval_delay:

1270

if client._approved or not client.approval_delay:

1755

1271

#We are approved or approval is disabled

1756

1272

break

1757

elif client.approved is None:

1273

elif client._approved is None:

1758

1274

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

1759

1275

client.name)

1760

1276

if self.server.use_dbus:

1771

1287

return

1772

1288

1773

1289

#wait until timeout or approved

1290

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

1774

1291

time = datetime.datetime.now()

1775

1292

client.changedstate.acquire()

1776

client.changedstate.wait(

1777

float(timedelta_to_milliseconds(delay)

1778

/ 1000))

1293

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

1779

1294

client.changedstate.release()

1780

1295

time2 = datetime.datetime.now()

1781

1296

if (time2 - time) >= delay:

1797

1312

try:

1798

1313

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

1799

1314

except gnutls.errors.GNUTLSError as error:

1800

logger.warning("gnutls send failed",

1801

exc_info=error)

1315

logger.warning("gnutls send failed")

1802

1316

return

1803

1317

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

1804

1318

sent, len(client.secret)

1805

1319

- (sent_size + sent))

1806

1320

sent_size += sent

1807

1321

1808

1322

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

1809

# bump the timeout using extended_timeout

1810

client.bump_timeout(client.extended_timeout)

1323

# bump the timeout as if seen

1324

client.checked_ok()

1811

1325

if self.server.use_dbus:

1812

1326

# Emit D-Bus signal

1813

1327

client.GotSecret()

1818

1332

try:

1819

1333

session.bye()

1820

1334

except gnutls.errors.GNUTLSError as error:

1821

logger.warning("GnuTLS bye failed",

1822

exc_info=error)

1335

logger.warning("GnuTLS bye failed")

1823

1336

1824

1337

@staticmethod

1825

1338

def peer_certificate(session):

1881

1394

# Convert the buffer to a Python bytestring

1882

1395

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

1883

1396

# Convert the bytestring to hexadecimal notation

1884

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

1397

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

1885

1398

return hex_fpr

1886

1399

1887

1400

1890

1403

def sub_process_main(self, request, address):

1891

1404

try:

1892

1405

self.finish_request(request, address)

1893

except Exception:

1406

except:

1894

1407

self.handle_error(request, address)

1895

1408

self.close_request(request)

1896

1409

1897

1410

def process_request(self, request, address):

1898

1411

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

1899

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

1900

args = (request, address))

1901

proc.start()

1902

return proc

1903

1412

multiprocessing.Process(target = self.sub_process_main,

1413

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

1904

1414

1905

1415

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1906

1416

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

1910

1420

This function creates a new pipe in self.pipe

1911

1421

"""

1912

1422

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1913

1914

proc = MultiprocessingMixIn.process_request(self, request,

1915

client_address)

1423

1424

super(MultiprocessingMixInWithPipe,

1425

self).process_request(request, client_address)

1916

1426

self.child_pipe.close()

1917

self.add_pipe(parent_pipe, proc)

1918

1919

def add_pipe(self, parent_pipe, proc):

1427

self.add_pipe(parent_pipe)

1428

1429

def add_pipe(self, parent_pipe):

1920

1430

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

1921

raise NotImplementedError()

1922

1431

raise NotImplementedError

1923

1432

1924

1433

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1925

1434

socketserver.TCPServer, object):

1931

1440

use_ipv6: Boolean; to use IPv6 or not

1932

1441

"""

1933

1442

def __init__(self, server_address, RequestHandlerClass,

1934

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

1935

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

1936

creating a new one with socket.socket().

1937

"""

1443

interface=None, use_ipv6=True):

1938

1444

self.interface = interface

1939

1445

if use_ipv6:

1940

1446

self.address_family = socket.AF_INET6

1941

if socketfd is not None:

1942

# Save the file descriptor

1943

self.socketfd = socketfd

1944

# Save the original socket.socket() function

1945

self.socket_socket = socket.socket

1946

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

1947

#

1948

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

1949

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

1950

# patching socket.socket.)

1951

#

1952

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

1953

@functools.wraps(socket.socket)

1954

def socket_wrapper(*args, **kwargs):

1955

# Restore original function so subsequent calls are

1956

# not affected.

1957

socket.socket = self.socket_socket

1958

del self.socket_socket

1959

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

1960

# saved file descriptor.

1961

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

1962

# Replace socket.socket() function with wrapper

1963

socket.socket = socket_wrapper

1964

# The socketserver.TCPServer.__init__ will call

1965

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

1966

# socket_wrapper(), if socketfd was set.

1967

1447

socketserver.TCPServer.__init__(self, server_address,

1968

1448

RequestHandlerClass)

1969

1970

1449

def server_bind(self):

1971

1450

"""This overrides the normal server_bind() function

1972

1451

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

1980

1459

try:

1981

1460

self.socket.setsockopt(socket.SOL_SOCKET,

1982

1461

SO_BINDTODEVICE,

1983

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

1462

str(self.interface

1463

+ '\0'))

1984

1464

except socket.error as error:

1985

if error.errno == errno.EPERM:

1986

logger.error("No permission to bind to"

1987

" interface %s", self.interface)

1988

elif error.errno == errno.ENOPROTOOPT:

1465

if error[0] == errno.EPERM:

1466

logger.error("No permission to"

1467

" bind to interface %s",

1468

self.interface)

1469

elif error[0] == errno.ENOPROTOOPT:

1989

1470

logger.error("SO_BINDTODEVICE not available;"

1990

1471

" cannot bind to interface %s",

1991

1472

self.interface)

1992

elif error.errno == errno.ENODEV:

1993

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

1994

" cannot bind", self.interface)

1995

1473

else:

1996

1474

raise

1997

1475

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

2000

1478

if self.address_family == socket.AF_INET6:

2001

1479

any_address = "::" # in6addr_any

2002

1480

else:

2003

any_address = "0.0.0.0" # INADDR_ANY

1481

any_address = socket.INADDR_ANY

2004

1482

self.server_address = (any_address,

2005

1483

self.server_address[1])

2006

1484

elif not self.server_address[1]:

2027

1505

"""

2028

1506

def __init__(self, server_address, RequestHandlerClass,

2029

1507

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

2030

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

1508

gnutls_priority=None, use_dbus=True):

2031

1509

self.enabled = False

2032

1510

self.clients = clients

2033

1511

if self.clients is None:

2034

self.clients = {}

1512

self.clients = set()

2035

1513

self.use_dbus = use_dbus

2036

1514

self.gnutls_priority = gnutls_priority

2037

1515

IPv6_TCPServer.__init__(self, server_address,

2038

1516

RequestHandlerClass,

2039

1517

interface = interface,

2040

use_ipv6 = use_ipv6,

2041

socketfd = socketfd)

1518

use_ipv6 = use_ipv6)

2042

1519

def server_activate(self):

2043

1520

if self.enabled:

2044

1521

return socketserver.TCPServer.server_activate(self)

2045

2046

1522

def enable(self):

2047

1523

self.enabled = True

2048

2049

def add_pipe(self, parent_pipe, proc):

1524

def add_pipe(self, parent_pipe):

2050

1525

# Call "handle_ipc" for both data and EOF events

2051

1526

gobject.io_add_watch(parent_pipe.fileno(),

2052

1527

gobject.IO_IN | gobject.IO_HUP,

2053

1528

functools.partial(self.handle_ipc,

2054

parent_pipe =

2055

parent_pipe,

2056

proc = proc))

2057

1529

parent_pipe = parent_pipe))

1530

2058

1531

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

2059

proc = None, client_object=None):

2060

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

2061

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

2062

# Wait for other process to exit

2063

proc.join()

1532

client_object=None):

1533

condition_names = {

1534

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

1535

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

1536

# blocking).

1537

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

1538

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

1539

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

1540

# broken, usually for pipes and

1541

# sockets).

1542

}

1543

conditions_string = ' | '.join(name

1544

for cond, name in

1545

condition_names.iteritems()

1546

if cond & condition)

1547

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

1548

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

2064

1549

return False

2065

1550

2066

1551

# Read a request from the child

2071

1556

fpr = request[1]

2072

1557

address = request[2]

2073

1558

2074

for c in self.clients.itervalues():

1559

for c in self.clients:

2075

1560

if c.fingerprint == fpr:

2076

1561

client = c

2077

1562

break

2078

1563

else:

2079

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

2080

"dress: %s", fpr, address)

1564

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

1565

"dress: %s", fpr, address)

2081

1566

if self.use_dbus:

2082

1567

# Emit D-Bus signal

2083

mandos_dbus_service.ClientNotFound(fpr,

2084

address[0])

1568

mandos_dbus_service.ClientNotFound(fpr, address[0])

2085

1569

parent_pipe.send(False)

2086

1570

return False

2087

1571

2088

1572

gobject.io_add_watch(parent_pipe.fileno(),

2089

1573

gobject.IO_IN | gobject.IO_HUP,

2090

1574

functools.partial(self.handle_ipc,

2091

parent_pipe =

2092

parent_pipe,

2093

proc = proc,

2094

client_object =

2095

client))

1575

parent_pipe = parent_pipe,

1576

client_object = client))

2096

1577

parent_pipe.send(True)

2097

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

2098

# same fileno

1578

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

2099

1579

return False

2100

1580

if command == 'funcall':

2101

1581

funcname = request[1]

2102

1582

args = request[2]

2103

1583

kwargs = request[3]

2104

1584

2105

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

2106

funcname)(*args,

2107

**kwargs)))

2108

1585

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

1586

2109

1587

if command == 'getattr':

2110

1588

attrname = request[1]

2111

1589

if callable(client_object.__getattribute__(attrname)):

2112

1590

parent_pipe.send(('function',))

2113

1591

else:

2114

parent_pipe.send(('data', client_object

2115

.__getattribute__(attrname)))

1592

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

2116

1593

2117

1594

if command == 'setattr':

2118

1595

attrname = request[1]

2119

1596

value = request[2]

2120

1597

setattr(client_object, attrname, value)

2121

1598

2122

1599

return True

2123

1600

2124

1601

2125

def rfc3339_duration_to_delta(duration):

2126

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

2127

2128

>>> rfc3339_duration_to_delta("P7D")

2129

datetime.timedelta(7)

2130

>>> rfc3339_duration_to_delta("PT60S")

2131

datetime.timedelta(0, 60)

2132

>>> rfc3339_duration_to_delta("PT60M")

2133

datetime.timedelta(0, 3600)

2134

>>> rfc3339_duration_to_delta("PT24H")

2135

datetime.timedelta(1)

2136

>>> rfc3339_duration_to_delta("P1W")

2137

datetime.timedelta(7)

2138

>>> rfc3339_duration_to_delta("PT5M30S")

2139

datetime.timedelta(0, 330)

2140

>>> rfc3339_duration_to_delta("P1DT3M20S")

2141

datetime.timedelta(1, 200)

2142

"""

2143

2144

# Parsing an RFC 3339 duration with regular expressions is not

2145

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

2146

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

2147

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

2148

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

2149

# avoid excessive use of external libraries.

2150

2151

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

2152

Token = collections.namedtuple("Token",

2153

("regexp", # To match token; if

2154

# "value" is not None,

2155

# must have a "group"

2156

# containing digits

2157

"value", # datetime.timedelta or

2158

# None

2159

"followers")) # Tokens valid after

2160

# this token

2161

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

2162

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

2163

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

2164

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

2165

datetime.timedelta(seconds=1),

2166

frozenset((token_end,)))

2167

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

2168

datetime.timedelta(minutes=1),

2169

frozenset((token_second, token_end)))

2170

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

2171

datetime.timedelta(hours=1),

2172

frozenset((token_minute, token_end)))

2173

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

2174

None,

2175

frozenset((token_hour, token_minute,

2176

token_second)))

2177

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

2178

datetime.timedelta(days=1),

2179

frozenset((token_time, token_end)))

2180

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

2181

datetime.timedelta(weeks=4),

2182

frozenset((token_day, token_end)))

2183

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

2184

datetime.timedelta(weeks=52),

2185

frozenset((token_month, token_end)))

2186

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

2187

datetime.timedelta(weeks=1),

2188

frozenset((token_end,)))

2189

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

2190

frozenset((token_year, token_month,

2191

token_day, token_time,

2192

token_week))),

2193

# Define starting values

2194

value = datetime.timedelta() # Value so far

2195

found_token = None

2196

followers = frozenset(token_duration,) # Following valid tokens

2197

s = duration # String left to parse

2198

# Loop until end token is found

2199

while found_token is not token_end:

2200

# Search for any currently valid tokens

2201

for token in followers:

2202

match = token.regexp.match(s)

2203

if match is not None:

2204

# Token found

2205

if token.value is not None:

2206

# Value found, parse digits

2207

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

2208

# Add to value so far

2209

value += factor * token.value

2210

# Strip token from string

2211

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

2212

# Go to found token

2213

found_token = token

2214

# Set valid next tokens

2215

followers = found_token.followers

2216

break

2217

else:

2218

# No currently valid tokens were found

2219

raise ValueError("Invalid RFC 3339 duration")

2220

# End token found

2221

return value

2222

2223

2224

1602

def string_to_delta(interval):

2225

1603

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

2226

1604

2237

1615

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

2238

1616

datetime.timedelta(0, 330)

2239

1617

"""

2240

2241

try:

2242

return rfc3339_duration_to_delta(interval)

2243

except ValueError:

2244

pass

2245

2246

1618

timevalue = datetime.timedelta(0)

2247

1619

for s in interval.split():

2248

1620

try:

2259

1631

elif suffix == "w":

2260

1632

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

2261

1633

else:

2262

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

2263

.format(suffix))

2264

except IndexError as e:

1634

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

1635

except (ValueError, IndexError) as e:

2265

1636

raise ValueError(*(e.args))

2266

1637

timevalue += delta

2267

1638

return timevalue

2268

1639

2269

1640

1641

def if_nametoindex(interface):

1642

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

1643

1644

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

1645

global if_nametoindex

1646

try:

1647

if_nametoindex = (ctypes.cdll.LoadLibrary

1648

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

1649

.if_nametoindex)

1650

except (OSError, AttributeError):

1651

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

1652

def if_nametoindex(interface):

1653

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

1654

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

1655

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

1656

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1657

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

1658

interface))

1659

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

1660

ifreq[16:20])[0]

1661

return interface_index

1662

return if_nametoindex(interface)

1663

1664

2270

1665

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

2271

1666

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

2272

1667

2280

1675

sys.exit()

2281

1676

if not noclose:

2282

1677

# Close all standard open file descriptors

2283

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

1678

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

2284

1679

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

2285

1680

raise OSError(errno.ENODEV,

2286

"{0} not a character device"

2287

.format(os.devnull))

1681

"%s not a character device"

1682

% os.path.devnull)

2288

1683

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

2289

1684

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

2290

1685

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

2299

1694

2300

1695

parser = argparse.ArgumentParser()

2301

1696

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

2302

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

1697

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

2303

1698

help="show version number and exit")

2304

1699

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

2305

1700

help="Bind to interface IF")

2311

1706

help="Run self-test")

2312

1707

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

2313

1708

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

2314

" to terminal", default=None)

1709

" to terminal")

2315

1710

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

2316

1711

help="Debug level for stdout output")

2317

1712

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

2324

1719

" files")

2325

1720

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

2326

1721

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

2327

" system bus interface", default=None)

1722

" system bus interface")

2328

1723

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

2329

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

2330

default=None)

2331

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

2332

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

2333

" state", default=None)

2334

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

2335

help="Specify a file descriptor to a network"

2336

" socket to use instead of creating one")

2337

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

2338

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

2339

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

2340

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

2341

1724

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

2342

1725

options = parser.parse_args()

2343

1726

2344

1727

if options.check:

2345

1728

import doctest

2346

fail_count, test_count = doctest.testmod()

2347

sys.exit(os.EX_OK if fail_count == 0 else 1)

1729

doctest.testmod()

1730

sys.exit()

2348

1731

2349

1732

# Default values for config file for server-global settings

2350

1733

server_defaults = { "interface": "",

2352

1735

"port": "",

2353

1736

"debug": "False",

2354

1737

"priority":

2355

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",

1738

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

2356

1739

"servicename": "Mandos",

2357

1740

"use_dbus": "True",

2358

1741

"use_ipv6": "True",

2359

1742

"debuglevel": "",

2360

"restore": "True",

2361

"socket": "",

2362

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

2363

"foreground": "False",

2364

1743

}

2365

1744

2366

1745

# Parse config file for server-global settings

2371

1750

# Convert the SafeConfigParser object to a dict

2372

1751

server_settings = server_config.defaults()

2373

1752

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

2374

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

1753

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

2375

1754

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

2376

1755

option)

2377

1756

if server_settings["port"]:

2378

1757

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

2379

1758

"port")

2380

if server_settings["socket"]:

2381

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

2382

"socket")

2383

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

2384

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

2385

# happen with a supplied network socket.

2386

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

2387

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

2388

["socket"])

2389

1759

del server_config

2390

1760

2391

1761

# Override the settings from the config file with command line

2392

1762

# options, if set.

2393

1763

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

2394

1764

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

2395

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

2396

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

1765

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

2397

1766

value = getattr(options, option)

2398

1767

if value is not None:

2399

1768

server_settings[option] = value

2402

1771

for option in server_settings.keys():

2403

1772

if type(server_settings[option]) is str:

2404

1773

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

2405

# Force all boolean options to be boolean

2406

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

2407

"foreground"):

2408

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

2409

# Debug implies foreground

2410

if server_settings["debug"]:

2411

server_settings["foreground"] = True

2412

1774

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

2413

1775

2414

1776

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

2418

1780

debuglevel = server_settings["debuglevel"]

2419

1781

use_dbus = server_settings["use_dbus"]

2420

1782

use_ipv6 = server_settings["use_ipv6"]

2421

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

2422

stored_state_file)

2423

foreground = server_settings["foreground"]

2424

2425

if debug:

2426

initlogger(debug, logging.DEBUG)

2427

else:

2428

if not debuglevel:

2429

initlogger(debug)

2430

else:

2431

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

2432

initlogger(debug, level)

2433

1783

2434

1784

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

2435

1785

syslogger.setFormatter(logging.Formatter

2436

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

2437

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

2438

.format(server_settings

2439

["servicename"])))

1786

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

1787

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

1788

% server_settings["servicename"]))

2440

1789

2441

1790

# Parse config file with clients

2442

client_config = configparser.SafeConfigParser(Client

2443

.client_defaults)

1791

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

1792

"interval": "5m",

1793

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

1794

"host": "",

1795

"approval_delay": "0s",

1796

"approval_duration": "1s",

1797

}

1798

client_config = configparser.SafeConfigParser(client_defaults)

2444

1799

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

2445

1800

"clients.conf"))

2446

1801

2455

1810

use_ipv6=use_ipv6,

2456

1811

gnutls_priority=

2457

1812

server_settings["priority"],

2458

use_dbus=use_dbus,

2459

socketfd=(server_settings["socket"]

2460

or None))

2461

if not foreground:

2462

pidfilename = "/run/mandos.pid"

2463

if not os.path.isdir("/run/."):

2464

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

2465

pidfile = None

1813

use_dbus=use_dbus)

1814

if not debug:

1815

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

2466

1816

try:

2467

1817

pidfile = open(pidfilename, "w")

2468

except IOError as e:

2469

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

2470

exc_info=e)

1818

except IOError:

1819

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

2471

1820

2472

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

1821

try:

1822

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

1823

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

1824

except KeyError:

2473

1825

try:

2474

uid = pwd.getpwnam(name).pw_uid

2475

gid = pwd.getpwnam(name).pw_gid

2476

break

1826

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

1827

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

2477

1828

except KeyError:

2478

continue

2479

else:

2480

uid = 65534

2481

gid = 65534

1829

try:

1830

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

1831

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

1832

except KeyError:

1833

uid = 65534

1834

gid = 65534

2482

1835

try:

2483

1836

os.setgid(gid)

2484

1837

os.setuid(uid)

2485

1838

except OSError as error:

2486

if error.errno != errno.EPERM:

2487

raise

1839

if error[0] != errno.EPERM:

1840

raise error

2488

1841

1842

if not debug and not debuglevel:

1843

syslogger.setLevel(logging.WARNING)

1844

console.setLevel(logging.WARNING)

1845

if debuglevel:

1846

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

1847

syslogger.setLevel(level)

1848

console.setLevel(level)

1849

2489

1850

if debug:

2490

1851

# Enable all possible GnuTLS debugging

2491

1852

2501

1862

.gnutls_global_set_log_function(debug_gnutls))

2502

1863

2503

1864

# Redirect stdin so all checkers get /dev/null

2504

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

1865

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

2505

1866

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

2506

1867

if null > 2:

2507

1868

os.close(null)

1869

else:

1870

# No console logging

1871

logger.removeHandler(console)

2508

1872

2509

1873

# Need to fork before connecting to D-Bus

2510

if not foreground:

1874

if not debug:

2511

1875

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

2512

1876

daemon()

2513

1877

2514

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

2515

# need to inform gobject that threads will be used.

2516

gobject.threads_init()

2517

2518

1878

global main_loop

2519

1879

# From the Avahi example code

2520

DBusGMainLoop(set_as_default=True)

1880

DBusGMainLoop(set_as_default=True )

2521

1881

main_loop = gobject.MainLoop()

2522

1882

bus = dbus.SystemBus()

2523

1883

# End of Avahi example code

2524

1884

if use_dbus:

2525

1885

try:

2526

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

1886

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

2527

1887

bus, do_not_queue=True)

2528

old_bus_name = (dbus.service.BusName

2529

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

2530

do_not_queue=True))

2531

1888

except dbus.exceptions.NameExistsException as e:

2532

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

1889

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

2533

1890

use_dbus = False

2534

1891

server_settings["use_dbus"] = False

2535

1892

tcp_server.use_dbus = False

2536

1893

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2537

service = AvahiServiceToSyslog(name =

2538

server_settings["servicename"],

2539

servicetype = "_mandos._tcp",

2540

protocol = protocol, bus = bus)

1894

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

1895

servicetype = "_mandos._tcp",

1896

protocol = protocol, bus = bus)

2541

1897

if server_settings["interface"]:

2542

1898

service.interface = (if_nametoindex

2543

1899

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

2548

1904

client_class = Client

2549

1905

if use_dbus:

2550

1906

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

2551

2552

client_settings = Client.config_parser(client_config)

2553

old_client_settings = {}

2554

clients_data = {}

2555

2556

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

2557

global wnull

2558

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

2559

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

2560

# mode

2561

if debug or not foreground:

2562

wnull.close()

2563

2564

# Get client data and settings from last running state.

2565

if server_settings["restore"]:

2566

try:

2567

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

2568

clients_data, old_client_settings = (pickle.load

2569

(stored_state))

2570

os.remove(stored_state_path)

2571

except IOError as e:

2572

if e.errno == errno.ENOENT:

2573

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

2574

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

2575

else:

2576

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

2577

exc_info=e)

2578

raise

2579

except EOFError as e:

2580

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

2581

"EOFError:", exc_info=e)

2582

2583

with PGPEngine() as pgp:

2584

for client_name, client in clients_data.iteritems():

2585

# Skip removed clients

2586

if client_name not in client_settings:

2587

continue

2588

2589

# Decide which value to use after restoring saved state.

2590

# We have three different values: Old config file,

2591

# new config file, and saved state.

2592

# New config value takes precedence if it differs from old

2593

# config value, otherwise use saved state.

2594

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

2595

try:

2596

# For each value in new config, check if it

2597

# differs from the old config value (Except for

2598

# the "secret" attribute)

2599

if (name != "secret" and

2600

value != old_client_settings[client_name]

2601

[name]):

2602

client[name] = value

2603

except KeyError:

2604

pass

2605

2606

# Clients who has passed its expire date can still be

2607

# enabled if its last checker was successful. Clients

2608

# whose checker succeeded before we stored its state is

2609

# assumed to have successfully run all checkers during

2610

# downtime.

2611

if client["enabled"]:

2612

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

2613

if not client["last_checked_ok"]:

2614

logger.warning(

2615

"disabling client {0} - Client never "

2616

"performed a successful checker"

2617

.format(client_name))

2618

client["enabled"] = False

2619

elif client["last_checker_status"] != 0:

2620

logger.warning(

2621

"disabling client {0} - Client "

2622

"last checker failed with error code {1}"

2623

.format(client_name,

2624

client["last_checker_status"]))

2625

client["enabled"] = False

2626

else:

2627

client["expires"] = (datetime.datetime

2628

.utcnow()

2629

+ client["timeout"])

2630

logger.debug("Last checker succeeded,"

2631

" keeping {0} enabled"

2632

.format(client_name))

1907

def client_config_items(config, section):

1908

special_settings = {

1909

"approved_by_default":

1910

lambda: config.getboolean(section,

1911

"approved_by_default"),

1912

}

1913

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

2633

1914

try:

2634

client["secret"] = (

2635

pgp.decrypt(client["encrypted_secret"],

2636

client_settings[client_name]

2637

["secret"]))

2638

except PGPError:

2639

# If decryption fails, we use secret from new settings

2640

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

2641

.format(client_name))

2642

client["secret"] = (

2643

client_settings[client_name]["secret"])

2644

2645

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

2646

for client_name in (set(old_client_settings)

2647

- set(client_settings)):

2648

del clients_data[client_name]

2649

for client_name in (set(client_settings)

2650

- set(old_client_settings)):

2651

clients_data[client_name] = client_settings[client_name]

2652

2653

# Create all client objects

2654

for client_name, client in clients_data.iteritems():

2655

tcp_server.clients[client_name] = client_class(

2656

name = client_name, settings = client,

2657

server_settings = server_settings)

2658

1915

yield (name, special_settings[name]())

1916

except KeyError:

1917

yield (name, value)

1918

1919

tcp_server.clients.update(set(

1920

client_class(name = section,

1921

config= dict(client_config_items(

1922

client_config, section)))

1923

for section in client_config.sections()))

2659

1924

if not tcp_server.clients:

2660

1925

logger.warning("No clients defined")

2661

2662

if not foreground:

2663

if pidfile is not None:

2664

try:

2665

with pidfile:

2666

pid = os.getpid()

2667

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

2668

except IOError:

2669

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

2670

pidfilename, pid)

2671

del pidfile

1926

1927

if not debug:

1928

try:

1929

with pidfile:

1930

pid = os.getpid()

1931

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

1932

del pidfile

1933

except IOError:

1934

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

1935

pidfilename, pid)

1936

except NameError:

1937

# "pidfile" was never created

1938

pass

2672

1939

del pidfilename

2673

1940

1941

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

1942

2674

1943

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

2675

1944

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

2676

1945

2677

1946

if use_dbus:

2678

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

2679

"se.bsnet.fukt.Mandos"})

2680

class MandosDBusService(DBusObjectWithProperties):

1947

class MandosDBusService(dbus.service.Object):

2681

1948

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

2682

1949

def __init__(self):

2683

1950

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

2684

_interface = "se.recompile.Mandos"

2685

2686

@dbus_interface_annotations(_interface)

2687

def _foo(self):

2688

return { "org.freedesktop.DBus.Property"

2689

".EmitsChangedSignal":

2690

"false"}

1951

_interface = "se.bsnet.fukt.Mandos"

2691

1952

2692

1953

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

2693

1954

def ClientAdded(self, objpath):

2708

1969

def GetAllClients(self):

2709

1970

"D-Bus method"

2710

1971

return dbus.Array(c.dbus_object_path

2711

for c in

2712

tcp_server.clients.itervalues())

1972

for c in tcp_server.clients)

2713

1973

2714

1974

@dbus.service.method(_interface,

2715

1975

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

2717

1977

"D-Bus method"

2718

1978

return dbus.Dictionary(

2719

1979

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

2720

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

1980

for c in tcp_server.clients),

2721

1981

signature="oa{sv}")

2722

1982

2723

1983

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

2724

1984

def RemoveClient(self, object_path):

2725

1985

"D-Bus method"

2726

for c in tcp_server.clients.itervalues():

1986

for c in tcp_server.clients:

2727

1987

if c.dbus_object_path == object_path:

2728

del tcp_server.clients[c.name]

1988

tcp_server.clients.remove(c)

2729

1989

c.remove_from_connection()

2730

1990

# Don't signal anything except ClientRemoved

2731

1991

c.disable(quiet=True)

2742

2002

"Cleanup function; run on exit"

2743

2003

service.cleanup()

2744

2004

2745

multiprocessing.active_children()

2746

wnull.close()

2747

if not (tcp_server.clients or client_settings):

2748

return

2749

2750

# Store client before exiting. Secrets are encrypted with key

2751

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

2752

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

2753

clients = {}

2754

with PGPEngine() as pgp:

2755

for client in tcp_server.clients.itervalues():

2756

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

2757

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

2758

key)

2759

client_dict = {}

2760

2761

# A list of attributes that can not be pickled

2762

# + secret.

2763

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

2764

"checker", "server_settings"))

2765

for name, typ in (inspect.getmembers

2766

(dbus.service.Object)):

2767

exclude.add(name)

2768

2769

client_dict["encrypted_secret"] = (client

2770

.encrypted_secret)

2771

for attr in client.client_structure:

2772

if attr not in exclude:

2773

client_dict[attr] = getattr(client, attr)

2774

2775

clients[client.name] = client_dict

2776

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

2777

2778

try:

2779

with (tempfile.NamedTemporaryFile

2780

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

2781

dir=os.path.dirname(stored_state_path),

2782

delete=False)) as stored_state:

2783

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

2784

tempname=stored_state.name

2785

os.rename(tempname, stored_state_path)

2786

except (IOError, OSError) as e:

2787

if not debug:

2788

try:

2789

os.remove(tempname)

2790

except NameError:

2791

pass

2792

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

2793

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

2794

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

2795

else:

2796

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

2797

exc_info=e)

2798

raise

2799

2800

# Delete all clients, and settings from config

2801

2005

while tcp_server.clients:

2802

name, client = tcp_server.clients.popitem()

2006

client = tcp_server.clients.pop()

2803

2007

if use_dbus:

2804

2008

client.remove_from_connection()

2009

client.disable_hook = None

2805

2010

# Don't signal anything except ClientRemoved

2806

2011

client.disable(quiet=True)

2807

2012

if use_dbus:

2808

2013

# Emit D-Bus signal

2809

mandos_dbus_service.ClientRemoved(client

2810

.dbus_object_path,

2014

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2811

2015

client.name)

2812

client_settings.clear()

2813

2016

2814

2017

atexit.register(cleanup)

2815

2018

2816

for client in tcp_server.clients.itervalues():

2019

for client in tcp_server.clients:

2817

2020

if use_dbus:

2818

2021

# Emit D-Bus signal

2819

2022

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2820

# Need to initiate checking of clients

2821

if client.enabled:

2822

client.init_checker()

2023

client.enable()

2823

2024

2824

2025

tcp_server.enable()

2825

2026

tcp_server.server_activate()

2828

2029

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

2829

2030

if use_ipv6:

2830

2031

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

2831

" flowinfo %d, scope_id %d",

2832

*tcp_server.socket.getsockname())

2032

" flowinfo %d, scope_id %d"

2033

% tcp_server.socket.getsockname())

2833

2034

else: # IPv4

2834

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

2835

*tcp_server.socket.getsockname())

2035

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

2036

% tcp_server.socket.getsockname())

2836

2037

2837

2038

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

2838

2039

2841

2042

try:

2842

2043

service.activate()

2843

2044

except dbus.exceptions.DBusException as error:

2844

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

2045

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

2845

2046

cleanup()

2846

2047

sys.exit(1)

2847

2048

# End of Avahi example code

2854

2055

logger.debug("Starting main loop")

2855

2056

main_loop.run()

2856

2057

except AvahiError as error:

2857

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

2058

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

2858

2059

cleanup()

2859

2060

sys.exit(1)

2860

2061

except KeyboardInterrupt: