/mandos/release : revision 237.7.211

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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@fukt.bsnet.se>.

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# Contact the authors at <mandos@recompile.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 = "1.3.0"

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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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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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version = "1.6.4"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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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 = (logging.handlers.SysLogHandler

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(facility =

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logging.handlers.SysLogHandler.LOG_DAEMON,

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

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

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

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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.GetAlternativeServiceName(self.name))

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self.name = unicode(self.server

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.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("DBusException: %s", error)

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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def remove(self):

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

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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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: %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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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) as e:

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

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else:

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

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def activate(self):

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

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if self.server is None:

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self.server_state_changed(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_enabled: datetime.datetime(); (UTC)

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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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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", "fingerprint",

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

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

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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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client_defaults = { "timeout": "PT5M",

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"extended_timeout": "PT15M",

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"interval": "PT2M",

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

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"host": "",

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"approval_delay": "PT0S",

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"approval_duration": "PT1S",

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"approved_by_default": "True",

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"enabled": "True",

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}

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def timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

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return self._timedelta_to_milliseconds(self.timeout)

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return timedelta_to_milliseconds(self.timeout)

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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.extended_timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return self._timedelta_to_milliseconds(self.interval)

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return timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

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return 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

328

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

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attribute."""

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return timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

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def config_parser(config):

487

"""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.

490

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

491

value given the same arguments.

492

"""

493

settings = {}

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for client_name in config.sections():

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section = dict(config.items(client_name))

496

client = settings[client_name] = {}

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

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# Reformat values from string types to Python types

500

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

528

client["last_checker_status"] = -2

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return settings

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532

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

330

533

self.name = name

331

if config is None:

332

config = {}

534

if server_settings is None:

535

server_settings = {}

536

self.server_settings = server_settings

537

# adding all client settings

538

for setting, value in settings.iteritems():

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setattr(self, setting, value)

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if self.enabled:

542

if not hasattr(self, "last_enabled"):

543

self.last_enabled = datetime.datetime.utcnow()

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if not hasattr(self, "expires"):

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

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+ self.timeout)

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else:

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self.last_enabled = None

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self.expires = None

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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()

336

554

# function

337

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

338

.replace(" ", ""))

339

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

340

if "secret" in config:

341

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

342

elif "secfile" in config:

343

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

344

(config["secfile"])),

345

"rb") as secfile:

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self.secret = secfile.read()

347

else:

348

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

349

% self.name)

350

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

351

self.created = datetime.datetime.utcnow()

352

self.enabled = False

353

self.last_approval_request = None

354

self.last_enabled = None

355

self.last_checked_ok = None

356

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

357

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

358

self.disable_hook = disable_hook

556

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

557

datetime.datetime.utcnow())

558

559

# attributes specific for this server instance

359

560

self.checker = None

360

561

self.checker_initiator_tag = None

361

562

self.disable_initiator_tag = None

362

563

self.checker_callback_tag = None

363

self.checker_command = config["checker"]

364

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self.current_checker_command = None

365

self.last_connect = None

366

self._approved = None

367

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

368

True)

565

self.approved = None

369

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self.approvals_pending = 0

370

self.approval_delay = string_to_delta(

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config["approval_delay"])

372

self.approval_duration = string_to_delta(

373

config["approval_duration"])

374

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

567

self.changedstate = (multiprocessing_manager

568

.Condition(multiprocessing_manager

569

.Lock()))

570

self.client_structure = [attr for attr in

571

self.__dict__.iterkeys()

572

if not attr.startswith("_")]

573

self.client_structure.append("client_structure")

574

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

576

lambda obj:

577

isinstance(obj,

578

property)):

579

if not name.startswith("_"):

580

self.client_structure.append(name)

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582

# Send notice to process children that client state has changed

376

583

def send_changedstate(self):

377

self.changedstate.acquire()

378

self.changedstate.notify_all()

379

self.changedstate.release()

380

584

with self.changedstate:

585

self.changedstate.notify_all()

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def enable(self):

382

588

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

383

589

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

384

590

# Already enabled

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591

return

386

self.send_changedstate()

592

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

593

self.enabled = True

387

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self.last_enabled = datetime.datetime.utcnow()

595

self.init_checker()

596

self.send_changedstate()

597

598

def disable(self, quiet=True):

599

"""Disable this client."""

600

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

601

return False

602

if not quiet:

603

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

604

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

605

gobject.source_remove(self.disable_initiator_tag)

606

self.disable_initiator_tag = None

607

self.expires = None

608

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

609

gobject.source_remove(self.checker_initiator_tag)

610

self.checker_initiator_tag = None

611

self.stop_checker()

612

self.enabled = False

613

if not quiet:

614

self.send_changedstate()

615

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

616

return False

617

618

def __del__(self):

619

self.disable()

620

621

def init_checker(self):

388

622

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

389

623

# and every interval from then on.

624

if self.checker_initiator_tag is not None:

625

gobject.source_remove(self.checker_initiator_tag)

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626

self.checker_initiator_tag = (gobject.timeout_add

391

627

(self.interval_milliseconds(),

392

628

self.start_checker))

393

629

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

630

if self.disable_initiator_tag is not None:

631

gobject.source_remove(self.disable_initiator_tag)

394

632

self.disable_initiator_tag = (gobject.timeout_add

395

633

(self.timeout_milliseconds(),

396

634

self.disable))

397

self.enabled = True

398

635

# Also start a new checker *right now*.

399

636

self.start_checker()

400

637

401

def disable(self, quiet=True):

402

"""Disable this client."""

403

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

404

return False

405

if not quiet:

406

self.send_changedstate()

407

if not quiet:

408

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

409

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

410

gobject.source_remove(self.disable_initiator_tag)

411

self.disable_initiator_tag = None

412

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

413

gobject.source_remove(self.checker_initiator_tag)

414

self.checker_initiator_tag = None

415

self.stop_checker()

416

if self.disable_hook:

417

self.disable_hook(self)

418

self.enabled = False

419

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

420

return False

421

422

def __del__(self):

423

self.disable_hook = None

424

self.disable()

425

426

638

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

427

639

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

428

640

self.checker_callback_tag = None

429

641

self.checker = None

430

642

if os.WIFEXITED(condition):

431

exitstatus = os.WEXITSTATUS(condition)

432

if exitstatus == 0:

643

self.last_checker_status = os.WEXITSTATUS(condition)

644

if self.last_checker_status == 0:

433

645

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

434

646

vars(self))

435

647

self.checked_ok()

437

649

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

438

650

vars(self))

439

651

else:

652

self.last_checker_status = -1

440

653

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

441

654

vars(self))

442

655

443

656

def checked_ok(self):

444

"""Bump up the timeout for this client.

445

446

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

447

alive and well.

448

"""

657

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

449

658

self.last_checked_ok = datetime.datetime.utcnow()

450

gobject.source_remove(self.disable_initiator_tag)

451

self.disable_initiator_tag = (gobject.timeout_add

452

(self.timeout_milliseconds(),

453

self.disable))

659

self.last_checker_status = 0

660

self.bump_timeout()

661

662

def bump_timeout(self, timeout=None):

663

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

664

if timeout is None:

665

timeout = self.timeout

666

if self.disable_initiator_tag is not None:

667

gobject.source_remove(self.disable_initiator_tag)

668

self.disable_initiator_tag = None

669

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

670

self.disable_initiator_tag = (gobject.timeout_add

671

(timedelta_to_milliseconds

672

(timeout), self.disable))

673

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

454

674

455

675

def need_approval(self):

456

676

self.last_approval_request = datetime.datetime.utcnow()

461

681

If a checker already exists, leave it running and do

462

682

nothing."""

463

683

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

464

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

465

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

466

# client would inevitably timeout, since no checker would get

467

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

684

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

685

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

686

# would inevitably timeout, since no checker would get a

687

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

468

688

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

469

689

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

470

690

# should be.

472

692

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

473

693

try:

474

694

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

475

except (AttributeError, OSError) as error:

476

if (isinstance(error, OSError)

477

and error.errno != errno.ECHILD):

478

raise error

695

except AttributeError:

696

pass

697

except OSError as error:

698

if error.errno != errno.ECHILD:

699

raise

479

700

else:

480

701

if pid:

481

702

logger.warning("Checker was a zombie")

484

705

self.current_checker_command)

485

706

# Start a new checker if needed

486

707

if self.checker is None:

708

# Escape attributes for the shell

709

escaped_attrs = dict(

710

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

711

for attr in

712

self.runtime_expansions)

487

713

try:

488

# In case checker_command has exactly one % operator

489

command = self.checker_command % self.host

490

except TypeError:

491

# Escape attributes for the shell

492

escaped_attrs = dict(

493

(attr,

494

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

495

errors=

496

'replace')))

497

for attr in

498

self.runtime_expansions)

499

500

try:

501

command = self.checker_command % escaped_attrs

502

except TypeError as error:

503

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

504

' %s', self.checker_command, error)

505

return True # Try again later

714

command = self.checker_command % escaped_attrs

715

except TypeError as error:

716

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

717

self.checker_command, exc_info=error)

718

return True # Try again later

506

719

self.current_checker_command = command

507

720

try:

508

721

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

511

724

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

512

725

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

513

726

# always replaced by /dev/null.)

727

# The exception is when not debugging but nevertheless

728

# running in the foreground; use the previously

729

# created wnull.

730

popen_args = {}

731

if (not self.server_settings["debug"]

732

and self.server_settings["foreground"]):

733

popen_args.update({"stdout": wnull,

734

"stderr": wnull })

514

735

self.checker = subprocess.Popen(command,

515

736

close_fds=True,

516

shell=True, cwd="/")

517

self.checker_callback_tag = (gobject.child_watch_add

518

(self.checker.pid,

519

self.checker_callback,

520

data=command))

521

# The checker may have completed before the gobject

522

# watch was added. Check for this.

737

shell=True, cwd="/",

738

**popen_args)

739

except OSError as error:

740

logger.error("Failed to start subprocess",

741

exc_info=error)

742

return True

743

self.checker_callback_tag = (gobject.child_watch_add

744

(self.checker.pid,

745

self.checker_callback,

746

data=command))

747

# The checker may have completed before the gobject

748

# watch was added. Check for this.

749

try:

523

750

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

524

if pid:

525

gobject.source_remove(self.checker_callback_tag)

526

self.checker_callback(pid, status, command)

527

751

except OSError as error:

528

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

529

error)

752

if error.errno == errno.ECHILD:

753

# This should never happen

754

logger.error("Child process vanished",

755

exc_info=error)

756

return True

757

raise

758

if pid:

759

gobject.source_remove(self.checker_callback_tag)

760

self.checker_callback(pid, status, command)

530

761

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

531

762

return True

532

763

539

770

return

540

771

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

541

772

try:

542

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

773

self.checker.terminate()

543

774

#time.sleep(0.5)

544

775

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

545

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

776

# self.checker.kill()

546

777

except OSError as error:

547

778

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

548

779

raise

549

780

self.checker = None

550

781

782

551

783

def dbus_service_property(dbus_interface, signature="v",

552

784

access="readwrite", byte_arrays=False):

553

785

"""Decorators for marking methods of a DBusObjectWithProperties to

564

796

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

565

797

if byte_arrays and signature != "ay":

566

798

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

567

" signature %r" % signature)

799

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

568

800

def decorator(func):

569

801

func._dbus_is_property = True

570

802

func._dbus_interface = dbus_interface

578

810

return decorator

579

811

580

812

813

def dbus_interface_annotations(dbus_interface):

814

"""Decorator for marking functions returning interface annotations

815

816

Usage:

817

818

@dbus_interface_annotations("org.example.Interface")

819

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

820

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

821

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

822

"false"}

823

"""

824

def decorator(func):

825

func._dbus_is_interface = True

826

func._dbus_interface = dbus_interface

827

func._dbus_name = dbus_interface

828

return func

829

return decorator

830

831

832

def dbus_annotations(annotations):

833

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

834

Usage:

835

836

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

837

access="r")

838

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

839

"org.freedesktop.DBus.Property."

840

"EmitsChangedSignal": "false"})

841

def Property_dbus_property(self):

842

return dbus.Boolean(False)

843

"""

844

def decorator(func):

845

func._dbus_annotations = annotations

846

return func

847

return decorator

848

849

581

850

class DBusPropertyException(dbus.exceptions.DBusException):

582

851

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

583

852

"""

599

868

600

869

class DBusObjectWithProperties(dbus.service.Object):

601

870

"""A D-Bus object with properties.

602

871

603

872

Classes inheriting from this can use the dbus_service_property

604

873

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

605

874

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

606

875

"""

607

876

608

877

@staticmethod

609

def _is_dbus_property(obj):

610

return getattr(obj, "_dbus_is_property", False)

878

def _is_dbus_thing(thing):

879

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

880

881

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

882

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

883

"""

884

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

885

False)

611

886

612

def _get_all_dbus_properties(self):

887

def _get_all_dbus_things(self, thing):

613

888

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

614

889

"""

615

return ((prop._dbus_name, prop)

616

for name, prop in

617

inspect.getmembers(self, self._is_dbus_property))

890

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

891

name),

892

athing.__get__(self))

893

for cls in self.__class__.__mro__

894

for name, athing in

895

inspect.getmembers(cls,

896

self._is_dbus_thing(thing)))

618

897

619

898

def _get_dbus_property(self, interface_name, property_name):

620

899

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

621

900

property with the specified name and interface.

622

901

"""

623

for name in (property_name,

624

property_name + "_dbus_property"):

625

prop = getattr(self, name, None)

626

if (prop is None

627

or not self._is_dbus_property(prop)

628

or prop._dbus_name != property_name

629

or (interface_name and prop._dbus_interface

630

and interface_name != prop._dbus_interface)):

631

continue

632

return prop

902

for cls in self.__class__.__mro__:

903

for name, value in (inspect.getmembers

904

(cls,

905

self._is_dbus_thing("property"))):

906

if (value._dbus_name == property_name

907

and value._dbus_interface == interface_name):

908

return value.__get__(self)

909

633

910

# No such property

634

911

raise DBusPropertyNotFound(self.dbus_object_path + ":"

635

912

+ interface_name + "."

659

936

# The byte_arrays option is not supported yet on

660

937

# signatures other than "ay".

661

938

if prop._dbus_signature != "ay":

662

raise ValueError

663

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

664

for byte in value))

939

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

940

"'ay' signature {0!r}"

941

.format(prop._dbus_signature))

942

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

943

for byte in value))

665

944

prop(value)

666

945

667

946

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

669

948

def GetAll(self, interface_name):

670

949

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

671

950

standard.

672

951

673

952

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

674

953

"""

675

all = {}

676

for name, prop in self._get_all_dbus_properties():

954

properties = {}

955

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

677

956

if (interface_name

678

957

and interface_name != prop._dbus_interface):

679

958

# Interface non-empty but did not match

683

962

continue

684

963

value = prop()

685

964

if not hasattr(value, "variant_level"):

686

all[name] = value

965

properties[name] = value

687

966

continue

688

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

689

value.variant_level+1)

690

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

967

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

968

value.variant_level+1)

969

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

691

970

692

971

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

693

972

out_signature="s",

694

973

path_keyword='object_path',

695

974

connection_keyword='connection')

696

975

def Introspect(self, object_path, connection):

697

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

976

"""Overloading of standard D-Bus method.

977

978

Inserts property tags and interface annotation tags.

698

979

"""

699

980

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

700

981

connection)

707

988

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

708

989

return e

709

990

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

991

# Add property tags

710

992

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

711

993

for name, prop

712

in self._get_all_dbus_properties()

994

in self._get_all_dbus_things("property")

713

995

if prop._dbus_interface

714

996

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

715

997

if_tag.appendChild(tag)

998

# Add annotation tags

999

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

1000

for tag in if_tag.getElementsByTagName(typ):

1001

annots = dict()

1002

for name, prop in (self.

1003

_get_all_dbus_things(typ)):

1004

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

1005

and prop._dbus_interface

1006

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

1007

annots.update(getattr

1008

(prop,

1009

"_dbus_annotations",

1010

{}))

1011

for name, value in annots.iteritems():

1012

ann_tag = document.createElement(

1013

"annotation")

1014

ann_tag.setAttribute("name", name)

1015

ann_tag.setAttribute("value", value)

1016

tag.appendChild(ann_tag)

1017

# Add interface annotation tags

1018

for annotation, value in dict(

1019

itertools.chain.from_iterable(

1020

annotations().iteritems()

1021

for name, annotations in

1022

self._get_all_dbus_things("interface")

1023

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

1024

)).iteritems():

1025

ann_tag = document.createElement("annotation")

1026

ann_tag.setAttribute("name", annotation)

1027

ann_tag.setAttribute("value", value)

1028

if_tag.appendChild(ann_tag)

716

1029

# Add the names to the return values for the

717

1030

# "org.freedesktop.DBus.Properties" methods

718

1031

if (if_tag.getAttribute("name")

733

1046

except (AttributeError, xml.dom.DOMException,

734

1047

xml.parsers.expat.ExpatError) as error:

735

1048

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

736

error)

1049

exc_info=error)

737

1050

return xmlstring

738

1051

739

1052

1053

def datetime_to_dbus(dt, variant_level=0):

1054

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

1055

if dt is None:

1056

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

1057

return dbus.String(dt.isoformat(),

1058

variant_level=variant_level)

1059

1060

1061

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1062

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

1063

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

1064

interface names according to the "alt_interface_names" mapping.

1065

Usage:

1066

1067

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

1068

"net.example.AlternateInterface"})

1069

class SampleDBusObject(dbus.service.Object):

1070

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

1071

def SampleDBusMethod():

1072

pass

1073

1074

The above "SampleDBusMethod" on "SampleDBusObject" will be

1075

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

1076

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

1077

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

1078

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

1079

1080

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

1081

(from DBusObjectWithProperties) and interfaces (from the

1082

dbus_interface_annotations decorator).

1083

"""

1084

def wrapper(cls):

1085

for orig_interface_name, alt_interface_name in (

1086

alt_interface_names.iteritems()):

1087

attr = {}

1088

interface_names = set()

1089

# Go though all attributes of the class

1090

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

1091

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

1092

# with the wrong interface name

1093

if (not hasattr(attribute, "_dbus_interface")

1094

or not attribute._dbus_interface

1095

.startswith(orig_interface_name)):

1096

continue

1097

# Create an alternate D-Bus interface name based on

1098

# the current name

1099

alt_interface = (attribute._dbus_interface

1100

.replace(orig_interface_name,

1101

alt_interface_name))

1102

interface_names.add(alt_interface)

1103

# Is this a D-Bus signal?

1104

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

1105

# Extract the original non-method undecorated

1106

# function by black magic

1107

nonmethod_func = (dict(

1108

zip(attribute.func_code.co_freevars,

1109

attribute.__closure__))["func"]

1110

.cell_contents)

1111

# Create a new, but exactly alike, function

1112

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

1113

# with the alternate D-Bus interface name

1114

new_function = (dbus.service.signal

1115

(alt_interface,

1116

attribute._dbus_signature)

1117

(types.FunctionType(

1118

nonmethod_func.func_code,

1119

nonmethod_func.func_globals,

1120

nonmethod_func.func_name,

1121

nonmethod_func.func_defaults,

1122

nonmethod_func.func_closure)))

1123

# Copy annotations, if any

1124

try:

1125

new_function._dbus_annotations = (

1126

dict(attribute._dbus_annotations))

1127

except AttributeError:

1128

pass

1129

# Define a creator of a function to call both the

1130

# original and alternate functions, so both the

1131

# original and alternate signals gets sent when

1132

# the function is called

1133

def fixscope(func1, func2):

1134

"""This function is a scope container to pass

1135

func1 and func2 to the "call_both" function

1136

outside of its arguments"""

1137

def call_both(*args, **kwargs):

1138

"""This function will emit two D-Bus

1139

signals by calling func1 and func2"""

1140

func1(*args, **kwargs)

1141

func2(*args, **kwargs)

1142

return call_both

1143

# Create the "call_both" function and add it to

1144

# the class

1145

attr[attrname] = fixscope(attribute, new_function)

1146

# Is this a D-Bus method?

1147

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

1148

# Create a new, but exactly alike, function

1149

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

1150

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

1151

# to the class.

1152

attr[attrname] = (dbus.service.method

1153

(alt_interface,

1154

attribute._dbus_in_signature,

1155

attribute._dbus_out_signature)

1156

(types.FunctionType

1157

(attribute.func_code,

1158

attribute.func_globals,

1159

attribute.func_name,

1160

attribute.func_defaults,

1161

attribute.func_closure)))

1162

# Copy annotations, if any

1163

try:

1164

attr[attrname]._dbus_annotations = (

1165

dict(attribute._dbus_annotations))

1166

except AttributeError:

1167

pass

1168

# Is this a D-Bus property?

1169

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

1170

# Create a new, but exactly alike, function

1171

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

1172

# property with the alternate D-Bus interface

1173

# name. Add it to the class.

1174

attr[attrname] = (dbus_service_property

1175

(alt_interface,

1176

attribute._dbus_signature,

1177

attribute._dbus_access,

1178

attribute

1179

._dbus_get_args_options

1180

["byte_arrays"])

1181

(types.FunctionType

1182

(attribute.func_code,

1183

attribute.func_globals,

1184

attribute.func_name,

1185

attribute.func_defaults,

1186

attribute.func_closure)))

1187

# Copy annotations, if any

1188

try:

1189

attr[attrname]._dbus_annotations = (

1190

dict(attribute._dbus_annotations))

1191

except AttributeError:

1192

pass

1193

# Is this a D-Bus interface?

1194

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

1195

# Create a new, but exactly alike, function

1196

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

1197

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

1198

# to the class.

1199

attr[attrname] = (dbus_interface_annotations

1200

(alt_interface)

1201

(types.FunctionType

1202

(attribute.func_code,

1203

attribute.func_globals,

1204

attribute.func_name,

1205

attribute.func_defaults,

1206

attribute.func_closure)))

1207

if deprecate:

1208

# Deprecate all alternate interfaces

1209

iname="_AlternateDBusNames_interface_annotation{0}"

1210

for interface_name in interface_names:

1211

@dbus_interface_annotations(interface_name)

1212

def func(self):

1213

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

1214

"true" }

1215

# Find an unused name

1216

for aname in (iname.format(i)

1217

for i in itertools.count()):

1218

if aname not in attr:

1219

attr[aname] = func

1220

break

1221

if interface_names:

1222

# Replace the class with a new subclass of it with

1223

# methods, signals, etc. as created above.

1224

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

1225

(cls,), attr)

1226

return cls

1227

return wrapper

1228

1229

1230

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

1231

"se.bsnet.fukt.Mandos"})

740

1232

class ClientDBus(Client, DBusObjectWithProperties):

741

1233

"""A Client class using D-Bus

742

1234

751

1243

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

752

1244

753

1245

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

754

self._approvals_pending = 0

755

1246

self.bus = bus

756

1247

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

757

1248

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

763

1254

("/clients/" + client_object_name))

764

1255

DBusObjectWithProperties.__init__(self, self.bus,

765

1256

self.dbus_object_path)

766

767

def _get_approvals_pending(self):

768

return self._approvals_pending

769

def _set_approvals_pending(self, value):

770

old_value = self._approvals_pending

771

self._approvals_pending = value

772

bval = bool(value)

773

if (hasattr(self, "dbus_object_path")

774

and bval is not bool(old_value)):

775

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

776

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

777

dbus_bool)

778

779

approvals_pending = property(_get_approvals_pending,

780

_set_approvals_pending)

781

del _get_approvals_pending, _set_approvals_pending

782

783

@staticmethod

784

def _datetime_to_dbus(dt, variant_level=0):

785

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

786

return dbus.String(dt.isoformat(),

787

variant_level=variant_level)

788

789

def enable(self):

790

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

791

r = Client.enable(self)

792

if oldstate != self.enabled:

793

# Emit D-Bus signals

794

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

795

dbus.Boolean(True, variant_level=1))

796

self.PropertyChanged(

797

dbus.String("LastEnabled"),

798

self._datetime_to_dbus(self.last_enabled,

799

variant_level=1))

800

return r

801

802

def disable(self, quiet = False):

803

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

804

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

805

if not quiet and oldstate != self.enabled:

806

# Emit D-Bus signal

807

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

808

dbus.Boolean(False, variant_level=1))

809

return r

1257

1258

def notifychangeproperty(transform_func,

1259

dbus_name, type_func=lambda x: x,

1260

variant_level=1):

1261

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

1262

its changes to DBus.

1263

1264

transform_fun: Function that takes a value and a variant_level

1265

and transforms it to a D-Bus type.

1266

dbus_name: D-Bus name of the variable

1267

type_func: Function that transform the value before sending it

1268

to the D-Bus. Default: no transform

1269

variant_level: D-Bus variant level. Default: 1

1270

"""

1271

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

1272

def setter(self, value):

1273

if hasattr(self, "dbus_object_path"):

1274

if (not hasattr(self, attrname) or

1275

type_func(getattr(self, attrname, None))

1276

!= type_func(value)):

1277

dbus_value = transform_func(type_func(value),

1278

variant_level

1279

=variant_level)

1280

self.PropertyChanged(dbus.String(dbus_name),

1281

dbus_value)

1282

setattr(self, attrname, value)

1283

1284

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

1285

1286

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1287

approvals_pending = notifychangeproperty(dbus.Boolean,

1288

"ApprovalPending",

1289

type_func = bool)

1290

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

1291

last_enabled = notifychangeproperty(datetime_to_dbus,

1292

"LastEnabled")

1293

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

1294

type_func = lambda checker:

1295

checker is not None)

1296

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1297

"LastCheckedOK")

1298

last_checker_status = notifychangeproperty(dbus.Int16,

1299

"LastCheckerStatus")

1300

last_approval_request = notifychangeproperty(

1301

datetime_to_dbus, "LastApprovalRequest")

1302

approved_by_default = notifychangeproperty(dbus.Boolean,

1303

"ApprovedByDefault")

1304

approval_delay = notifychangeproperty(dbus.UInt64,

1305

"ApprovalDelay",

1306

type_func =

1307

timedelta_to_milliseconds)

1308

approval_duration = notifychangeproperty(

1309

dbus.UInt64, "ApprovalDuration",

1310

type_func = timedelta_to_milliseconds)

1311

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

1312

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

1313

type_func =

1314

timedelta_to_milliseconds)

1315

extended_timeout = notifychangeproperty(

1316

dbus.UInt64, "ExtendedTimeout",

1317

type_func = timedelta_to_milliseconds)

1318

interval = notifychangeproperty(dbus.UInt64,

1319

"Interval",

1320

type_func =

1321

timedelta_to_milliseconds)

1322

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

1323

1324

del notifychangeproperty

810

1325

811

1326

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

812

1327

try:

821

1336

*args, **kwargs):

822

1337

self.checker_callback_tag = None

823

1338

self.checker = None

824

# Emit D-Bus signal

825

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

826

dbus.Boolean(False, variant_level=1))

827

1339

if os.WIFEXITED(condition):

828

1340

exitstatus = os.WEXITSTATUS(condition)

829

1341

# Emit D-Bus signal

839

1351

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

840

1352

*args, **kwargs)

841

1353

842

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

843

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

844

# Emit D-Bus signal

845

self.PropertyChanged(

846

dbus.String("LastCheckedOK"),

847

(self._datetime_to_dbus(self.last_checked_ok,

848

variant_level=1)))

849

850

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

851

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

852

# Emit D-Bus signal

853

self.PropertyChanged(

854

dbus.String("LastApprovalRequest"),

855

(self._datetime_to_dbus(self.last_approval_request,

856

variant_level=1)))

857

return r

858

859

1354

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

860

old_checker = self.checker

861

if self.checker is not None:

862

old_checker_pid = self.checker.pid

863

else:

864

old_checker_pid = None

1355

old_checker_pid = getattr(self.checker, "pid", None)

865

1356

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

866

1357

# Only if new checker process was started

867

1358

if (self.checker is not None

868

1359

and old_checker_pid != self.checker.pid):

869

1360

# Emit D-Bus signal

870

1361

self.CheckerStarted(self.current_checker_command)

871

self.PropertyChanged(

872

dbus.String("CheckerRunning"),

873

dbus.Boolean(True, variant_level=1))

874

1362

return r

875

1363

876

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

877

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

878

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

879

if (old_checker is not None

880

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

881

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

882

dbus.Boolean(False, variant_level=1))

883

return r

884

885

1364

def _reset_approved(self):

886

self._approved = None

1365

self.approved = None

887

1366

return False

888

1367

889

1368

def approve(self, value=True):

890

self.send_changedstate()

891

self._approved = value

892

gobject.timeout_add(self._timedelta_to_milliseconds

1369

self.approved = value

1370

gobject.timeout_add(timedelta_to_milliseconds

893

1371

(self.approval_duration),

894

1372

self._reset_approved)

895

1373

self.send_changedstate()

896

1374

897

1375

## D-Bus methods, signals & properties

898

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

1376

_interface = "se.recompile.Mandos.Client"

1377

1378

## Interfaces

1379

1380

@dbus_interface_annotations(_interface)

1381

def _foo(self):

1382

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

1383

"false"}

899

1384

900

1385

## Signals

901

1386

987

1472

if value is None: # get

988

1473

return dbus.Boolean(self.approved_by_default)

989

1474

self.approved_by_default = bool(value)

990

# Emit D-Bus signal

991

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

992

dbus.Boolean(value, variant_level=1))

993

1475

994

1476

# ApprovalDelay - property

995

1477

@dbus_service_property(_interface, signature="t",

998

1480

if value is None: # get

999

1481

return dbus.UInt64(self.approval_delay_milliseconds())

1000

1482

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

1001

# Emit D-Bus signal

1002

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

1003

dbus.UInt64(value, variant_level=1))

1004

1483

1005

1484

# ApprovalDuration - property

1006

1485

@dbus_service_property(_interface, signature="t",

1007

1486

access="readwrite")

1008

1487

def ApprovalDuration_dbus_property(self, value=None):

1009

1488

if value is None: # get

1010

return dbus.UInt64(self._timedelta_to_milliseconds(

1489

return dbus.UInt64(timedelta_to_milliseconds(

1011

1490

self.approval_duration))

1012

1491

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

1013

# Emit D-Bus signal

1014

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

1015

dbus.UInt64(value, variant_level=1))

1016

1492

1017

1493

# Name - property

1018

1494

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

1030

1506

def Host_dbus_property(self, value=None):

1031

1507

if value is None: # get

1032

1508

return dbus.String(self.host)

1033

self.host = value

1034

# Emit D-Bus signal

1035

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

1036

dbus.String(value, variant_level=1))

1509

self.host = unicode(value)

1037

1510

1038

1511

# Created - property

1039

1512

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

1040

1513

def Created_dbus_property(self):

1041

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

1514

return datetime_to_dbus(self.created)

1042

1515

1043

1516

# LastEnabled - property

1044

1517

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

1045

1518

def LastEnabled_dbus_property(self):

1046

if self.last_enabled is None:

1047

return dbus.String("")

1048

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

1519

return datetime_to_dbus(self.last_enabled)

1049

1520

1050

1521

# Enabled - property

1051

1522

@dbus_service_property(_interface, signature="b",

1065

1536

if value is not None:

1066

1537

self.checked_ok()

1067

1538

return

1068

if self.last_checked_ok is None:

1069

return dbus.String("")

1070

return dbus.String(self._datetime_to_dbus(self

1071

.last_checked_ok))

1539

return datetime_to_dbus(self.last_checked_ok)

1540

1541

# LastCheckerStatus - property

1542

@dbus_service_property(_interface, signature="n",

1543

access="read")

1544

def LastCheckerStatus_dbus_property(self):

1545

return dbus.Int16(self.last_checker_status)

1546

1547

# Expires - property

1548

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

1549

def Expires_dbus_property(self):

1550

return datetime_to_dbus(self.expires)

1072

1551

1073

1552

# LastApprovalRequest - property

1074

1553

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

1075

1554

def LastApprovalRequest_dbus_property(self):

1076

if self.last_approval_request is None:

1077

return dbus.String("")

1078

return dbus.String(self.

1079

_datetime_to_dbus(self

1080

.last_approval_request))

1555

return datetime_to_dbus(self.last_approval_request)

1081

1556

1082

1557

# Timeout - property

1083

1558

@dbus_service_property(_interface, signature="t",

1085

1560

def Timeout_dbus_property(self, value=None):

1086

1561

if value is None: # get

1087

1562

return dbus.UInt64(self.timeout_milliseconds())

1563

old_timeout = self.timeout

1088

1564

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

1089

# Emit D-Bus signal

1090

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

1091

dbus.UInt64(value, variant_level=1))

1092

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

1093

return

1094

# Reschedule timeout

1095

gobject.source_remove(self.disable_initiator_tag)

1096

self.disable_initiator_tag = None

1097

time_to_die = (self.

1098

_timedelta_to_milliseconds((self

1099

.last_checked_ok

1100

+ self.timeout)

1101

- datetime.datetime

1102

.utcnow()))

1103

if time_to_die <= 0:

1104

# The timeout has passed

1105

self.disable()

1106

else:

1107

self.disable_initiator_tag = (gobject.timeout_add

1108

(time_to_die, self.disable))

1565

# Reschedule disabling

1566

if self.enabled:

1567

now = datetime.datetime.utcnow()

1568

self.expires += self.timeout - old_timeout

1569

if self.expires <= now:

1570

# The timeout has passed

1571

self.disable()

1572

else:

1573

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

1574

is None):

1575

return

1576

gobject.source_remove(self.disable_initiator_tag)

1577

self.disable_initiator_tag = (

1578

gobject.timeout_add(

1579

timedelta_to_milliseconds(self.expires - now),

1580

self.disable))

1581

1582

# ExtendedTimeout - property

1583

@dbus_service_property(_interface, signature="t",

1584

access="readwrite")

1585

def ExtendedTimeout_dbus_property(self, value=None):

1586

if value is None: # get

1587

return dbus.UInt64(self.extended_timeout_milliseconds())

1588

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

1109

1589

1110

1590

# Interval - property

1111

1591

@dbus_service_property(_interface, signature="t",

1114

1594

if value is None: # get

1115

1595

return dbus.UInt64(self.interval_milliseconds())

1116

1596

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

1117

# Emit D-Bus signal

1118

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

1119

dbus.UInt64(value, variant_level=1))

1120

1597

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

1121

1598

return

1122

# Reschedule checker run

1123

gobject.source_remove(self.checker_initiator_tag)

1124

self.checker_initiator_tag = (gobject.timeout_add

1125

(value, self.start_checker))

1126

self.start_checker() # Start one now, too

1127

1599

if self.enabled:

1600

# Reschedule checker run

1601

gobject.source_remove(self.checker_initiator_tag)

1602

self.checker_initiator_tag = (gobject.timeout_add

1603

(value, self.start_checker))

1604

self.start_checker() # Start one now, too

1605

1128

1606

# Checker - property

1129

1607

@dbus_service_property(_interface, signature="s",

1130

1608

access="readwrite")

1131

1609

def Checker_dbus_property(self, value=None):

1132

1610

if value is None: # get

1133

1611

return dbus.String(self.checker_command)

1134

self.checker_command = value

1135

# Emit D-Bus signal

1136

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

1137

dbus.String(self.checker_command,

1138

variant_level=1))

1612

self.checker_command = unicode(value)

1139

1613

1140

1614

# CheckerRunning - property

1141

1615

@dbus_service_property(_interface, signature="b",

1168

1642

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

1169

1643

if not self._pipe.recv():

1170

1644

raise KeyError()

1171

1645

1172

1646

def __getattribute__(self, name):

1173

if(name == '_pipe'):

1647

if name == '_pipe':

1174

1648

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

1175

1649

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

1176

1650

data = self._pipe.recv()

1181

1655

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

1182

1656

return self._pipe.recv()[1]

1183

1657

return func

1184

1658

1185

1659

def __setattr__(self, name, value):

1186

if(name == '_pipe'):

1660

if name == '_pipe':

1187

1661

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

1188

1662

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

1189

1663

1200

1674

unicode(self.client_address))

1201

1675

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

1202

1676

self.server.child_pipe.fileno())

1203

1677

1204

1678

session = (gnutls.connection

1205

1679

.ClientSession(self.request,

1206

1680

gnutls.connection

1207

1681

.X509Credentials()))

1208

1682

1209

1683

# Note: gnutls.connection.X509Credentials is really a

1210

1684

# generic GnuTLS certificate credentials object so long as

1211

1685

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

1212

1686

# here despite using OpenPGP certificates.

1213

1687

1214

1688

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

1215

1689

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

1216

1690

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

1222

1696

(gnutls.library.functions

1223

1697

.gnutls_priority_set_direct(session._c_object,

1224

1698

priority, None))

1225

1699

1226

1700

# Start communication using the Mandos protocol

1227

1701

# Get protocol number

1228

1702

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

1229

1703

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

1230

1704

try:

1231

1705

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

1232

raise RuntimeError

1706

raise RuntimeError(line)

1233

1707

except (ValueError, IndexError, RuntimeError) as error:

1234

1708

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

1235

1709

return

1236

1710

1237

1711

# Start GnuTLS connection

1238

1712

try:

1239

1713

session.handshake()

1243

1717

# established. Just abandon the request.

1244

1718

return

1245

1719

logger.debug("Handshake succeeded")

1246

1720

1247

1721

approval_required = False

1248

1722

try:

1249

1723

try:

1254

1728

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

1255

1729

return

1256

1730

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

1257

1731

1258

1732

try:

1259

1733

client = ProxyClient(child_pipe, fpr,

1260

1734

self.client_address)

1272

1746

client.name)

1273

1747

if self.server.use_dbus:

1274

1748

# Emit D-Bus signal

1275

client.Rejected("Disabled")

1749

client.Rejected("Disabled")

1276

1750

return

1277

1751

1278

if client._approved or not client.approval_delay:

1752

if client.approved or not client.approval_delay:

1279

1753

#We are approved or approval is disabled

1280

1754

break

1281

elif client._approved is None:

1755

elif client.approved is None:

1282

1756

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

1283

1757

client.name)

1284

1758

if self.server.use_dbus:

1295

1769

return

1296

1770

1297

1771

#wait until timeout or approved

1298

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

1299

1772

time = datetime.datetime.now()

1300

1773

client.changedstate.acquire()

1301

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

1774

client.changedstate.wait(

1775

float(timedelta_to_milliseconds(delay)

1776

/ 1000))

1302

1777

client.changedstate.release()

1303

1778

time2 = datetime.datetime.now()

1304

1779

if (time2 - time) >= delay:

1320

1795

try:

1321

1796

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

1322

1797

except gnutls.errors.GNUTLSError as error:

1323

logger.warning("gnutls send failed")

1798

logger.warning("gnutls send failed",

1799

exc_info=error)

1324

1800

return

1325

1801

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

1326

1802

sent, len(client.secret)

1327

1803

- (sent_size + sent))

1328

1804

sent_size += sent

1329

1805

1330

1806

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

1331

# bump the timeout as if seen

1332

client.checked_ok()

1807

# bump the timeout using extended_timeout

1808

client.bump_timeout(client.extended_timeout)

1333

1809

if self.server.use_dbus:

1334

1810

# Emit D-Bus signal

1335

1811

client.GotSecret()

1340

1816

try:

1341

1817

session.bye()

1342

1818

except gnutls.errors.GNUTLSError as error:

1343

logger.warning("GnuTLS bye failed")

1819

logger.warning("GnuTLS bye failed",

1820

exc_info=error)

1344

1821

1345

1822

@staticmethod

1346

1823

def peer_certificate(session):

1402

1879

# Convert the buffer to a Python bytestring

1403

1880

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

1404

1881

# Convert the bytestring to hexadecimal notation

1405

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

1882

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

1406

1883

return hex_fpr

1407

1884

1408

1885

1411

1888

def sub_process_main(self, request, address):

1412

1889

try:

1413

1890

self.finish_request(request, address)

1414

except:

1891

except Exception:

1415

1892

self.handle_error(request, address)

1416

1893

self.close_request(request)

1417

1894

1418

1895

def process_request(self, request, address):

1419

1896

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

1420

multiprocessing.Process(target = self.sub_process_main,

1421

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

1897

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

1898

args = (request, address))

1899

proc.start()

1900

return proc

1901

1422

1902

1423

1903

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1424

1904

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

1428

1908

This function creates a new pipe in self.pipe

1429

1909

"""

1430

1910

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1431

1432

super(MultiprocessingMixInWithPipe,

1433

self).process_request(request, client_address)

1911

1912

proc = MultiprocessingMixIn.process_request(self, request,

1913

client_address)

1434

1914

self.child_pipe.close()

1435

self.add_pipe(parent_pipe)

1436

1437

def add_pipe(self, parent_pipe):

1915

self.add_pipe(parent_pipe, proc)

1916

1917

def add_pipe(self, parent_pipe, proc):

1438

1918

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

1439

raise NotImplementedError

1919

raise NotImplementedError()

1920

1440

1921

1441

1922

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1442

1923

socketserver.TCPServer, object):

1448

1929

use_ipv6: Boolean; to use IPv6 or not

1449

1930

"""

1450

1931

def __init__(self, server_address, RequestHandlerClass,

1451

interface=None, use_ipv6=True):

1932

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

1933

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

1934

creating a new one with socket.socket().

1935

"""

1452

1936

self.interface = interface

1453

1937

if use_ipv6:

1454

1938

self.address_family = socket.AF_INET6

1939

if socketfd is not None:

1940

# Save the file descriptor

1941

self.socketfd = socketfd

1942

# Save the original socket.socket() function

1943

self.socket_socket = socket.socket

1944

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

1945

#

1946

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

1947

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

1948

# patching socket.socket.)

1949

#

1950

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

1951

@functools.wraps(socket.socket)

1952

def socket_wrapper(*args, **kwargs):

1953

# Restore original function so subsequent calls are

1954

# not affected.

1955

socket.socket = self.socket_socket

1956

del self.socket_socket

1957

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

1958

# saved file descriptor.

1959

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

1960

# Replace socket.socket() function with wrapper

1961

socket.socket = socket_wrapper

1962

# The socketserver.TCPServer.__init__ will call

1963

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

1964

# socket_wrapper(), if socketfd was set.

1455

1965

socketserver.TCPServer.__init__(self, server_address,

1456

1966

RequestHandlerClass)

1967

1457

1968

def server_bind(self):

1458

1969

"""This overrides the normal server_bind() function

1459

1970

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

1467

1978

try:

1468

1979

self.socket.setsockopt(socket.SOL_SOCKET,

1469

1980

SO_BINDTODEVICE,

1470

str(self.interface

1471

+ '\0'))

1981

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

1472

1982

except socket.error as error:

1473

if error[0] == errno.EPERM:

1474

logger.error("No permission to"

1475

" bind to interface %s",

1476

self.interface)

1477

elif error[0] == errno.ENOPROTOOPT:

1983

if error.errno == errno.EPERM:

1984

logger.error("No permission to bind to"

1985

" interface %s", self.interface)

1986

elif error.errno == errno.ENOPROTOOPT:

1478

1987

logger.error("SO_BINDTODEVICE not available;"

1479

1988

" cannot bind to interface %s",

1480

1989

self.interface)

1990

elif error.errno == errno.ENODEV:

1991

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

1992

" cannot bind", self.interface)

1481

1993

else:

1482

1994

raise

1483

1995

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

1486

1998

if self.address_family == socket.AF_INET6:

1487

1999

any_address = "::" # in6addr_any

1488

2000

else:

1489

any_address = socket.INADDR_ANY

2001

any_address = "0.0.0.0" # INADDR_ANY

1490

2002

self.server_address = (any_address,

1491

2003

self.server_address[1])

1492

2004

elif not self.server_address[1]:

1513

2025

"""

1514

2026

def __init__(self, server_address, RequestHandlerClass,

1515

2027

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

1516

gnutls_priority=None, use_dbus=True):

2028

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

1517

2029

self.enabled = False

1518

2030

self.clients = clients

1519

2031

if self.clients is None:

1520

self.clients = set()

2032

self.clients = {}

1521

2033

self.use_dbus = use_dbus

1522

2034

self.gnutls_priority = gnutls_priority

1523

2035

IPv6_TCPServer.__init__(self, server_address,

1524

2036

RequestHandlerClass,

1525

2037

interface = interface,

1526

use_ipv6 = use_ipv6)

2038

use_ipv6 = use_ipv6,

2039

socketfd = socketfd)

1527

2040

def server_activate(self):

1528

2041

if self.enabled:

1529

2042

return socketserver.TCPServer.server_activate(self)

2043

1530

2044

def enable(self):

1531

2045

self.enabled = True

1532

def add_pipe(self, parent_pipe):

2046

2047

def add_pipe(self, parent_pipe, proc):

1533

2048

# Call "handle_ipc" for both data and EOF events

1534

2049

gobject.io_add_watch(parent_pipe.fileno(),

1535

2050

gobject.IO_IN | gobject.IO_HUP,

1536

2051

functools.partial(self.handle_ipc,

1537

parent_pipe = parent_pipe))

1538

2052

parent_pipe =

2053

parent_pipe,

2054

proc = proc))

2055

1539

2056

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

1540

client_object=None):

1541

condition_names = {

1542

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

1543

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

1544

# blocking).

1545

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

1546

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

1547

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

1548

# broken, usually for pipes and

1549

# sockets).

1550

}

1551

conditions_string = ' | '.join(name

1552

for cond, name in

1553

condition_names.iteritems()

1554

if cond & condition)

1555

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

1556

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

2057

proc = None, client_object=None):

2058

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

2059

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

2060

# Wait for other process to exit

2061

proc.join()

1557

2062

return False

1558

2063

1559

2064

# Read a request from the child

1564

2069

fpr = request[1]

1565

2070

address = request[2]

1566

2071

1567

for c in self.clients:

2072

for c in self.clients.itervalues():

1568

2073

if c.fingerprint == fpr:

1569

2074

client = c

1570

2075

break

1573

2078

"dress: %s", fpr, address)

1574

2079

if self.use_dbus:

1575

2080

# Emit D-Bus signal

1576

mandos_dbus_service.ClientNotFound(fpr, address[0])

2081

mandos_dbus_service.ClientNotFound(fpr,

2082

address[0])

1577

2083

parent_pipe.send(False)

1578

2084

return False

1579

2085

1580

2086

gobject.io_add_watch(parent_pipe.fileno(),

1581

2087

gobject.IO_IN | gobject.IO_HUP,

1582

2088

functools.partial(self.handle_ipc,

1583

parent_pipe = parent_pipe,

1584

client_object = client))

2089

parent_pipe =

2090

parent_pipe,

2091

proc = proc,

2092

client_object =

2093

client))

1585

2094

parent_pipe.send(True)

1586

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

2095

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

2096

# same fileno

1587

2097

return False

1588

2098

if command == 'funcall':

1589

2099

funcname = request[1]

1590

2100

args = request[2]

1591

2101

kwargs = request[3]

1592

2102

1593

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

1594

2103

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

2104

funcname)(*args,

2105

**kwargs)))

2106

1595

2107

if command == 'getattr':

1596

2108

attrname = request[1]

1597

2109

if callable(client_object.__getattribute__(attrname)):

1598

2110

parent_pipe.send(('function',))

1599

2111

else:

1600

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

2112

parent_pipe.send(('data', client_object

2113

.__getattribute__(attrname)))

1601

2114

1602

2115

if command == 'setattr':

1603

2116

attrname = request[1]

1604

2117

value = request[2]

1605

2118

setattr(client_object, attrname, value)

1606

2119

1607

2120

return True

1608

2121

1609

2122

2123

def rfc3339_duration_to_delta(duration):

2124

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

2125

2126

>>> rfc3339_duration_to_delta("P7D")

2127

datetime.timedelta(7)

2128

>>> rfc3339_duration_to_delta("PT60S")

2129

datetime.timedelta(0, 60)

2130

>>> rfc3339_duration_to_delta("PT60M")

2131

datetime.timedelta(0, 3600)

2132

>>> rfc3339_duration_to_delta("PT24H")

2133

datetime.timedelta(1)

2134

>>> rfc3339_duration_to_delta("P1W")

2135

datetime.timedelta(7)

2136

>>> rfc3339_duration_to_delta("PT5M30S")

2137

datetime.timedelta(0, 330)

2138

>>> rfc3339_duration_to_delta("P1DT3M20S")

2139

datetime.timedelta(1, 200)

2140

"""

2141

2142

# Parsing an RFC 3339 duration with regular expressions is not

2143

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

2144

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

2145

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

2146

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

2147

# avoid excessive use of external libraries.

2148

2149

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

2150

Token = collections.namedtuple("Token",

2151

("regexp", # To match token; if

2152

# "value" is not None,

2153

# must have a "group"

2154

# containing digits

2155

"value", # datetime.timedelta or

2156

# None

2157

"followers")) # Tokens valid after

2158

# this token

2159

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

2160

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

2161

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

2162

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

2163

datetime.timedelta(seconds=1),

2164

frozenset((token_end,)))

2165

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

2166

datetime.timedelta(minutes=1),

2167

frozenset((token_second, token_end)))

2168

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

2169

datetime.timedelta(hours=1),

2170

frozenset((token_minute, token_end)))

2171

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

2172

None,

2173

frozenset((token_hour, token_minute,

2174

token_second)))

2175

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

2176

datetime.timedelta(days=1),

2177

frozenset((token_time, token_end)))

2178

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

2179

datetime.timedelta(weeks=4),

2180

frozenset((token_day, token_end)))

2181

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

2182

datetime.timedelta(weeks=52),

2183

frozenset((token_month, token_end)))

2184

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

2185

datetime.timedelta(weeks=1),

2186

frozenset((token_end,)))

2187

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

2188

frozenset((token_year, token_month,

2189

token_day, token_time,

2190

token_week))),

2191

# Define starting values

2192

value = datetime.timedelta() # Value so far

2193

found_token = None

2194

followers = frozenset(token_duration,) # Following valid tokens

2195

s = duration # String left to parse

2196

# Loop until end token is found

2197

while found_token is not token_end:

2198

# Search for any currently valid tokens

2199

for token in followers:

2200

match = token.regexp.match(s)

2201

if match is not None:

2202

# Token found

2203

if token.value is not None:

2204

# Value found, parse digits

2205

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

2206

# Add to value so far

2207

value += factor * token.value

2208

# Strip token from string

2209

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

2210

# Go to found token

2211

found_token = token

2212

# Set valid next tokens

2213

followers = found_token.followers

2214

break

2215

else:

2216

# No currently valid tokens were found

2217

raise ValueError("Invalid RFC 3339 duration")

2218

# End token found

2219

return value

2220

2221

1610

2222

def string_to_delta(interval):

1611

2223

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

1612

2224

1623

2235

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

1624

2236

datetime.timedelta(0, 330)

1625

2237

"""

2238

2239

try:

2240

return rfc3339_duration_to_delta(interval)

2241

except ValueError:

2242

pass

2243

1626

2244

timevalue = datetime.timedelta(0)

1627

2245

for s in interval.split():

1628

2246

try:

1639

2257

elif suffix == "w":

1640

2258

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

1641

2259

else:

1642

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

1643

except (ValueError, IndexError) as e:

2260

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

2261

.format(suffix))

2262

except IndexError as e:

1644

2263

raise ValueError(*(e.args))

1645

2264

timevalue += delta

1646

2265

return timevalue

1647

2266

1648

2267

1649

def if_nametoindex(interface):

1650

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

1651

1652

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

1653

global if_nametoindex

1654

try:

1655

if_nametoindex = (ctypes.cdll.LoadLibrary

1656

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

1657

.if_nametoindex)

1658

except (OSError, AttributeError):

1659

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

1660

def if_nametoindex(interface):

1661

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

1662

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

1663

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

1664

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1665

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

1666

interface))

1667

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

1668

ifreq[16:20])[0]

1669

return interface_index

1670

return if_nametoindex(interface)

1671

1672

1673

2268

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

1674

2269

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

1675

2270

1683

2278

sys.exit()

1684

2279

if not noclose:

1685

2280

# Close all standard open file descriptors

1686

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

2281

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

1687

2282

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

1688

2283

raise OSError(errno.ENODEV,

1689

"%s not a character device"

1690

% os.path.devnull)

2284

"{0} not a character device"

2285

.format(os.devnull))

1691

2286

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

1692

2287

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

1693

2288

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

1702

2297

1703

2298

parser = argparse.ArgumentParser()

1704

2299

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

1705

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

2300

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

1706

2301

help="show version number and exit")

1707

2302

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

1708

2303

help="Bind to interface IF")

1714

2309

help="Run self-test")

1715

2310

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

1716

2311

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

1717

" to terminal")

2312

" to terminal", default=None)

1718

2313

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

1719

2314

help="Debug level for stdout output")

1720

2315

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

1727

2322

" files")

1728

2323

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

1729

2324

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

1730

" system bus interface")

2325

" system bus interface", default=None)

1731

2326

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

1732

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

2327

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

2328

default=None)

2329

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

2330

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

2331

" state", default=None)

2332

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

2333

help="Specify a file descriptor to a network"

2334

" socket to use instead of creating one")

2335

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

2336

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

2337

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

2338

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

2339

1733

2340

options = parser.parse_args()

1734

2341

1735

2342

if options.check:

1736

2343

import doctest

1737

doctest.testmod()

1738

sys.exit()

2344

fail_count, test_count = doctest.testmod()

2345

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

1739

2346

1740

2347

# Default values for config file for server-global settings

1741

2348

server_defaults = { "interface": "",

1743

2350

"port": "",

1744

2351

"debug": "False",

1745

2352

"priority":

1746

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

2353

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

1747

2354

"servicename": "Mandos",

1748

2355

"use_dbus": "True",

1749

2356

"use_ipv6": "True",

1750

2357

"debuglevel": "",

2358

"restore": "True",

2359

"socket": "",

2360

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

2361

"foreground": "False",

1751

2362

}

1752

2363

1753

2364

# Parse config file for server-global settings

1758

2369

# Convert the SafeConfigParser object to a dict

1759

2370

server_settings = server_config.defaults()

1760

2371

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

1761

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

2372

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

1762

2373

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

1763

2374

option)

1764

2375

if server_settings["port"]:

1765

2376

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

1766

2377

"port")

2378

if server_settings["socket"]:

2379

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

2380

"socket")

2381

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

2382

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

2383

# happen with a supplied network socket.

2384

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

2385

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

2386

["socket"])

1767

2387

del server_config

1768

2388

1769

2389

# Override the settings from the config file with command line

1770

2390

# options, if set.

1771

2391

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

1772

2392

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

1773

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

2393

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

2394

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

1774

2395

value = getattr(options, option)

1775

2396

if value is not None:

1776

2397

server_settings[option] = value

1779

2400

for option in server_settings.keys():

1780

2401

if type(server_settings[option]) is str:

1781

2402

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

2403

# Force all boolean options to be boolean

2404

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

2405

"foreground"):

2406

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

2407

# Debug implies foreground

2408

if server_settings["debug"]:

2409

server_settings["foreground"] = True

1782

2410

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

1783

2411

1784

2412

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

1788

2416

debuglevel = server_settings["debuglevel"]

1789

2417

use_dbus = server_settings["use_dbus"]

1790

2418

use_ipv6 = server_settings["use_ipv6"]

1791

2419

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

2420

stored_state_file)

2421

foreground = server_settings["foreground"]

2422

2423

if debug:

2424

initlogger(debug, logging.DEBUG)

2425

else:

2426

if not debuglevel:

2427

initlogger(debug)

2428

else:

2429

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

2430

initlogger(debug, level)

2431

1792

2432

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

1793

2433

syslogger.setFormatter(logging.Formatter

1794

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

1795

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

1796

% server_settings["servicename"]))

2434

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

2435

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

2436

.format(server_settings

2437

["servicename"])))

1797

2438

1798

2439

# Parse config file with clients

1799

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

1800

"interval": "5m",

1801

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

1802

"host": "",

1803

"approval_delay": "0s",

1804

"approval_duration": "1s",

1805

}

1806

client_config = configparser.SafeConfigParser(client_defaults)

2440

client_config = configparser.SafeConfigParser(Client

2441

.client_defaults)

1807

2442

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

1808

2443

"clients.conf"))

1809

2444

1818

2453

use_ipv6=use_ipv6,

1819

2454

gnutls_priority=

1820

2455

server_settings["priority"],

1821

use_dbus=use_dbus)

1822

if not debug:

1823

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

2456

use_dbus=use_dbus,

2457

socketfd=(server_settings["socket"]

2458

or None))

2459

if not foreground:

2460

pidfilename = "/run/mandos.pid"

2461

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

2462

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

2463

pidfile = None

1824

2464

try:

1825

2465

pidfile = open(pidfilename, "w")

1826

except IOError:

1827

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

2466

except IOError as e:

2467

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

2468

exc_info=e)

1828

2469

1829

try:

1830

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

1831

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

1832

except KeyError:

2470

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

1833

2471

try:

1834

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

1835

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

2472

uid = pwd.getpwnam(name).pw_uid

2473

gid = pwd.getpwnam(name).pw_gid

2474

break

1836

2475

except KeyError:

1837

try:

1838

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

1839

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

1840

except KeyError:

1841

uid = 65534

1842

gid = 65534

2476

continue

2477

else:

2478

uid = 65534

2479

gid = 65534

1843

2480

try:

1844

2481

os.setgid(gid)

1845

2482

os.setuid(uid)

1846

2483

except OSError as error:

1847

if error[0] != errno.EPERM:

1848

raise error

2484

if error.errno != errno.EPERM:

2485

raise

1849

2486

1850

if not debug and not debuglevel:

1851

syslogger.setLevel(logging.WARNING)

1852

console.setLevel(logging.WARNING)

1853

if debuglevel:

1854

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

1855

syslogger.setLevel(level)

1856

console.setLevel(level)

1857

1858

2487

if debug:

1859

2488

# Enable all possible GnuTLS debugging

1860

2489

1870

2499

.gnutls_global_set_log_function(debug_gnutls))

1871

2500

1872

2501

# Redirect stdin so all checkers get /dev/null

1873

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

2502

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

1874

2503

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

1875

2504

if null > 2:

1876

2505

os.close(null)

1877

else:

1878

# No console logging

1879

logger.removeHandler(console)

1880

2506

1881

2507

# Need to fork before connecting to D-Bus

1882

if not debug:

2508

if not foreground:

1883

2509

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

1884

2510

daemon()

1885

2511

2512

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

2513

# need to inform gobject that threads will be used.

2514

gobject.threads_init()

2515

1886

2516

global main_loop

1887

2517

# From the Avahi example code

1888

DBusGMainLoop(set_as_default=True )

2518

DBusGMainLoop(set_as_default=True)

1889

2519

main_loop = gobject.MainLoop()

1890

2520

bus = dbus.SystemBus()

1891

2521

# End of Avahi example code

1892

2522

if use_dbus:

1893

2523

try:

1894

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

2524

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

1895

2525

bus, do_not_queue=True)

2526

old_bus_name = (dbus.service.BusName

2527

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

2528

do_not_queue=True))

1896

2529

except dbus.exceptions.NameExistsException as e:

1897

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

2530

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

1898

2531

use_dbus = False

1899

2532

server_settings["use_dbus"] = False

1900

2533

tcp_server.use_dbus = False

1901

2534

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1902

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

1903

servicetype = "_mandos._tcp",

1904

protocol = protocol, bus = bus)

2535

service = AvahiServiceToSyslog(name =

2536

server_settings["servicename"],

2537

servicetype = "_mandos._tcp",

2538

protocol = protocol, bus = bus)

1905

2539

if server_settings["interface"]:

1906

2540

service.interface = (if_nametoindex

1907

2541

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

1912

2546

client_class = Client

1913

2547

if use_dbus:

1914

2548

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

1915

def client_config_items(config, section):

1916

special_settings = {

1917

"approved_by_default":

1918

lambda: config.getboolean(section,

1919

"approved_by_default"),

1920

}

1921

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

2549

2550

client_settings = Client.config_parser(client_config)

2551

old_client_settings = {}

2552

clients_data = {}

2553

2554

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

2555

global wnull

2556

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

2557

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

2558

# mode

2559

if debug or not foreground:

2560

wnull.close()

2561

2562

# Get client data and settings from last running state.

2563

if server_settings["restore"]:

2564

try:

2565

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

2566

clients_data, old_client_settings = (pickle.load

2567

(stored_state))

2568

os.remove(stored_state_path)

2569

except IOError as e:

2570

if e.errno == errno.ENOENT:

2571

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

2572

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

2573

else:

2574

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

2575

exc_info=e)

2576

raise

2577

except EOFError as e:

2578

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

2579

"EOFError:", exc_info=e)

2580

2581

with PGPEngine() as pgp:

2582

for client_name, client in clients_data.iteritems():

2583

# Skip removed clients

2584

if client_name not in client_settings:

2585

continue

2586

2587

# Decide which value to use after restoring saved state.

2588

# We have three different values: Old config file,

2589

# new config file, and saved state.

2590

# New config value takes precedence if it differs from old

2591

# config value, otherwise use saved state.

2592

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

2593

try:

2594

# For each value in new config, check if it

2595

# differs from the old config value (Except for

2596

# the "secret" attribute)

2597

if (name != "secret" and

2598

value != old_client_settings[client_name]

2599

[name]):

2600

client[name] = value

2601

except KeyError:

2602

pass

2603

2604

# Clients who has passed its expire date can still be

2605

# enabled if its last checker was successful. Clients

2606

# whose checker succeeded before we stored its state is

2607

# assumed to have successfully run all checkers during

2608

# downtime.

2609

if client["enabled"]:

2610

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

2611

if not client["last_checked_ok"]:

2612

logger.warning(

2613

"disabling client {0} - Client never "

2614

"performed a successful checker"

2615

.format(client_name))

2616

client["enabled"] = False

2617

elif client["last_checker_status"] != 0:

2618

logger.warning(

2619

"disabling client {0} - Client "

2620

"last checker failed with error code {1}"

2621

.format(client_name,

2622

client["last_checker_status"]))

2623

client["enabled"] = False

2624

else:

2625

client["expires"] = (datetime.datetime

2626

.utcnow()

2627

+ client["timeout"])

2628

logger.debug("Last checker succeeded,"

2629

" keeping {0} enabled"

2630

.format(client_name))

1922

2631

try:

1923

yield (name, special_settings[name]())

1924

except KeyError:

1925

yield (name, value)

1926

1927

tcp_server.clients.update(set(

1928

client_class(name = section,

1929

config= dict(client_config_items(

1930

client_config, section)))

1931

for section in client_config.sections()))

2632

client["secret"] = (

2633

pgp.decrypt(client["encrypted_secret"],

2634

client_settings[client_name]

2635

["secret"]))

2636

except PGPError:

2637

# If decryption fails, we use secret from new settings

2638

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

2639

.format(client_name))

2640

client["secret"] = (

2641

client_settings[client_name]["secret"])

2642

2643

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

2644

for client_name in (set(old_client_settings)

2645

- set(client_settings)):

2646

del clients_data[client_name]

2647

for client_name in (set(client_settings)

2648

- set(old_client_settings)):

2649

clients_data[client_name] = client_settings[client_name]

2650

2651

# Create all client objects

2652

for client_name, client in clients_data.iteritems():

2653

tcp_server.clients[client_name] = client_class(

2654

name = client_name, settings = client,

2655

server_settings = server_settings)

2656

1932

2657

if not tcp_server.clients:

1933

2658

logger.warning("No clients defined")

1934

1935

if not debug:

1936

try:

1937

with pidfile:

1938

pid = os.getpid()

1939

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

1940

del pidfile

1941

except IOError:

1942

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

1943

pidfilename, pid)

1944

except NameError:

1945

# "pidfile" was never created

1946

pass

2659

2660

if not foreground:

2661

if pidfile is not None:

2662

try:

2663

with pidfile:

2664

pid = os.getpid()

2665

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

2666

except IOError:

2667

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

2668

pidfilename, pid)

2669

del pidfile

1947

2670

del pidfilename

1948

1949

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

1950

2671

1951

2672

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

1952

2673

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

1953

2674

1954

2675

if use_dbus:

1955

class MandosDBusService(dbus.service.Object):

2676

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

2677

"se.bsnet.fukt.Mandos"})

2678

class MandosDBusService(DBusObjectWithProperties):

1956

2679

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

1957

2680

def __init__(self):

1958

2681

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

1959

_interface = "se.bsnet.fukt.Mandos"

2682

_interface = "se.recompile.Mandos"

2683

2684

@dbus_interface_annotations(_interface)

2685

def _foo(self):

2686

return { "org.freedesktop.DBus.Property"

2687

".EmitsChangedSignal":

2688

"false"}

1960

2689

1961

2690

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

1962

2691

def ClientAdded(self, objpath):

1977

2706

def GetAllClients(self):

1978

2707

"D-Bus method"

1979

2708

return dbus.Array(c.dbus_object_path

1980

for c in tcp_server.clients)

2709

for c in

2710

tcp_server.clients.itervalues())

1981

2711

1982

2712

@dbus.service.method(_interface,

1983

2713

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

1985

2715

"D-Bus method"

1986

2716

return dbus.Dictionary(

1987

2717

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

1988

for c in tcp_server.clients),

2718

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

1989

2719

signature="oa{sv}")

1990

2720

1991

2721

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

1992

2722

def RemoveClient(self, object_path):

1993

2723

"D-Bus method"

1994

for c in tcp_server.clients:

2724

for c in tcp_server.clients.itervalues():

1995

2725

if c.dbus_object_path == object_path:

1996

tcp_server.clients.remove(c)

2726

del tcp_server.clients[c.name]

1997

2727

c.remove_from_connection()

1998

2728

# Don't signal anything except ClientRemoved

1999

2729

c.disable(quiet=True)

2010

2740

"Cleanup function; run on exit"

2011

2741

service.cleanup()

2012

2742

2743

multiprocessing.active_children()

2744

wnull.close()

2745

if not (tcp_server.clients or client_settings):

2746

return

2747

2748

# Store client before exiting. Secrets are encrypted with key

2749

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

2750

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

2751

clients = {}

2752

with PGPEngine() as pgp:

2753

for client in tcp_server.clients.itervalues():

2754

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

2755

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

2756

key)

2757

client_dict = {}

2758

2759

# A list of attributes that can not be pickled

2760

# + secret.

2761

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

2762

"checker", "server_settings"))

2763

for name, typ in (inspect.getmembers

2764

(dbus.service.Object)):

2765

exclude.add(name)

2766

2767

client_dict["encrypted_secret"] = (client

2768

.encrypted_secret)

2769

for attr in client.client_structure:

2770

if attr not in exclude:

2771

client_dict[attr] = getattr(client, attr)

2772

2773

clients[client.name] = client_dict

2774

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

2775

2776

try:

2777

with (tempfile.NamedTemporaryFile

2778

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

2779

dir=os.path.dirname(stored_state_path),

2780

delete=False)) as stored_state:

2781

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

2782

tempname=stored_state.name

2783

os.rename(tempname, stored_state_path)

2784

except (IOError, OSError) as e:

2785

if not debug:

2786

try:

2787

os.remove(tempname)

2788

except NameError:

2789

pass

2790

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

2791

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

2792

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

2793

else:

2794

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

2795

exc_info=e)

2796

raise

2797

2798

# Delete all clients, and settings from config

2013

2799

while tcp_server.clients:

2014

client = tcp_server.clients.pop()

2800

name, client = tcp_server.clients.popitem()

2015

2801

if use_dbus:

2016

2802

client.remove_from_connection()

2017

client.disable_hook = None

2018

2803

# Don't signal anything except ClientRemoved

2019

2804

client.disable(quiet=True)

2020

2805

if use_dbus:

2021

2806

# Emit D-Bus signal

2022

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2807

mandos_dbus_service.ClientRemoved(client

2808

.dbus_object_path,

2023

2809

client.name)

2810

client_settings.clear()

2024

2811

2025

2812

atexit.register(cleanup)

2026

2813

2027

for client in tcp_server.clients:

2814

for client in tcp_server.clients.itervalues():

2028

2815

if use_dbus:

2029

2816

# Emit D-Bus signal

2030

2817

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2031

client.enable()

2818

# Need to initiate checking of clients

2819

if client.enabled:

2820

client.init_checker()

2032

2821

2033

2822

tcp_server.enable()

2034

2823

tcp_server.server_activate()

2037

2826

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

2038

2827

if use_ipv6:

2039

2828

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

2040

" flowinfo %d, scope_id %d"

2041

% tcp_server.socket.getsockname())

2829

" flowinfo %d, scope_id %d",

2830

*tcp_server.socket.getsockname())

2042

2831

else: # IPv4

2043

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

2044

% tcp_server.socket.getsockname())

2832

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

2833

*tcp_server.socket.getsockname())

2045

2834

2046

2835

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

2047

2836

2050

2839

try:

2051

2840

service.activate()

2052

2841

except dbus.exceptions.DBusException as error:

2053

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

2842

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

2054

2843

cleanup()

2055

2844

sys.exit(1)

2056

2845

# End of Avahi example code

2063

2852

logger.debug("Starting main loop")

2064

2853

main_loop.run()

2065

2854

except AvahiError as error:

2066

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

2855

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

2067

2856

cleanup()

2068

2857

sys.exit(1)

2069

2858

except KeyboardInterrupt: