/mandos/release : revision 237.7.190

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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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version = "1.6.2"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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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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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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

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"""init logger and add loglevel"""

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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

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pass

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class PGPEngine(object):

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

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def __init__(self):

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

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self.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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if len(encoded) > 2048:

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

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

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

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

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir=self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir = self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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decrypted_plaintext, err = proc.communicate(input

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= data)

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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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.group is not None:

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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException) as e:

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pass

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self.group = None

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match.remove()

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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self.group = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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self.server.EntryGroupNew(),

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follow_name_owner_changes=True),

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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if self.group is None:

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self.group = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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self.server.EntryGroupNew()),

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self .entry_group_state_changed))

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'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):

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pass

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self.group = None

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self.remove()

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

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

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

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avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

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if state in bad_states:

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if bad_states[state]:

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logger.error(bad_states[state])

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self.remove()

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if bad_states[state] is not None:

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if error is None:

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logger.error(bad_states[state])

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else:

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

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self.cleanup()

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elif state == avahi.SERVER_RUNNING:

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self.add()

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else:

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

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if error is None:

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

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else:

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

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def activate(self):

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

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if self.server is None:

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self.server_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

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'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):

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

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

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with exceptions for any special settings as defined above.

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

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value given the same arguments.

490

"""

491

settings = {}

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for client_name in config.sections():

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section = dict(config.items(client_name))

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client = settings[client_name] = {}

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

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# Reformat values from string types to Python types

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client["approved_by_default"] = config.getboolean(

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client_name, "approved_by_default")

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

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"enabled")

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

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.replace(" ", ""))

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if "secret" in section:

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

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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

526

client["last_checker_status"] = -2

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return settings

529

530

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

322

531

self.name = name

323

if config is None:

324

config = {}

532

if server_settings is None:

533

server_settings = {}

534

self.server_settings = server_settings

535

# adding all client settings

536

for setting, value in settings.iteritems():

537

setattr(self, setting, value)

538

539

if self.enabled:

540

if not hasattr(self, "last_enabled"):

541

self.last_enabled = datetime.datetime.utcnow()

542

if not hasattr(self, "expires"):

543

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

544

+ self.timeout)

545

else:

546

self.last_enabled = None

547

self.expires = None

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549

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

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550

# Uppercase and remove spaces from fingerprint for later

327

551

# comparison purposes with return value from the fingerprint()

328

552

# function

329

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

330

.replace(" ", ""))

331

553

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

332

if "secret" in config:

333

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

334

elif "secfile" in config:

335

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

336

(config["secfile"])),

337

"rb") as secfile:

338

self.secret = secfile.read()

339

else:

340

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

341

% self.name)

342

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

343

self.created = datetime.datetime.utcnow()

344

self.enabled = False

345

self.last_approval_request = None

346

self.last_enabled = None

347

self.last_checked_ok = None

348

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

349

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

350

self.disable_hook = disable_hook

554

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

555

datetime.datetime.utcnow())

556

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# attributes specific for this server instance

351

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self.checker = None

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self.checker_initiator_tag = None

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560

self.disable_initiator_tag = None

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561

self.checker_callback_tag = None

355

self.checker_command = config["checker"]

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self.current_checker_command = None

357

self.last_connect = None

358

self._approved = None

359

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

360

True)

563

self.approved = None

361

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self.approvals_pending = 0

362

self.approval_delay = string_to_delta(

363

config["approval_delay"])

364

self.approval_duration = string_to_delta(

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config["approval_duration"])

366

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

565

self.changedstate = (multiprocessing_manager

566

.Condition(multiprocessing_manager

567

.Lock()))

568

self.client_structure = [attr for attr in

569

self.__dict__.iterkeys()

570

if not attr.startswith("_")]

571

self.client_structure.append("client_structure")

572

573

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

574

lambda obj:

575

isinstance(obj,

576

property)):

577

if not name.startswith("_"):

578

self.client_structure.append(name)

367

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580

# Send notice to process children that client state has changed

368

581

def send_changedstate(self):

369

self.changedstate.acquire()

370

self.changedstate.notify_all()

371

self.changedstate.release()

372

582

with self.changedstate:

583

self.changedstate.notify_all()

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585

def enable(self):

374

586

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

375

587

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

376

588

# Already enabled

377

589

return

378

self.send_changedstate()

590

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

591

self.enabled = True

379

592

self.last_enabled = datetime.datetime.utcnow()

593

self.init_checker()

594

self.send_changedstate()

595

596

def disable(self, quiet=True):

597

"""Disable this client."""

598

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

599

return False

600

if not quiet:

601

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

602

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

603

gobject.source_remove(self.disable_initiator_tag)

604

self.disable_initiator_tag = None

605

self.expires = None

606

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

607

gobject.source_remove(self.checker_initiator_tag)

608

self.checker_initiator_tag = None

609

self.stop_checker()

610

self.enabled = False

611

if not quiet:

612

self.send_changedstate()

613

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

614

return False

615

616

def __del__(self):

617

self.disable()

618

619

def init_checker(self):

380

620

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

381

621

# and every interval from then on.

622

if self.checker_initiator_tag is not None:

623

gobject.source_remove(self.checker_initiator_tag)

382

624

self.checker_initiator_tag = (gobject.timeout_add

383

625

(self.interval_milliseconds(),

384

626

self.start_checker))

385

627

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

628

if self.disable_initiator_tag is not None:

629

gobject.source_remove(self.disable_initiator_tag)

386

630

self.disable_initiator_tag = (gobject.timeout_add

387

631

(self.timeout_milliseconds(),

388

632

self.disable))

389

self.enabled = True

390

633

# Also start a new checker *right now*.

391

634

self.start_checker()

392

635

393

def disable(self, quiet=True):

394

"""Disable this client."""

395

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

396

return False

397

if not quiet:

398

self.send_changedstate()

399

if not quiet:

400

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

401

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

402

gobject.source_remove(self.disable_initiator_tag)

403

self.disable_initiator_tag = None

404

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

405

gobject.source_remove(self.checker_initiator_tag)

406

self.checker_initiator_tag = None

407

self.stop_checker()

408

if self.disable_hook:

409

self.disable_hook(self)

410

self.enabled = False

411

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

412

return False

413

414

def __del__(self):

415

self.disable_hook = None

416

self.disable()

417

418

636

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

419

637

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

420

638

self.checker_callback_tag = None

421

639

self.checker = None

422

640

if os.WIFEXITED(condition):

423

exitstatus = os.WEXITSTATUS(condition)

424

if exitstatus == 0:

641

self.last_checker_status = os.WEXITSTATUS(condition)

642

if self.last_checker_status == 0:

425

643

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

426

644

vars(self))

427

645

self.checked_ok()

429

647

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

430

648

vars(self))

431

649

else:

650

self.last_checker_status = -1

432

651

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

433

652

vars(self))

434

653

435

654

def checked_ok(self):

436

"""Bump up the timeout for this client.

437

438

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

439

alive and well.

440

"""

655

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

441

656

self.last_checked_ok = datetime.datetime.utcnow()

442

gobject.source_remove(self.disable_initiator_tag)

443

self.disable_initiator_tag = (gobject.timeout_add

444

(self.timeout_milliseconds(),

445

self.disable))

657

self.last_checker_status = 0

658

self.bump_timeout()

659

660

def bump_timeout(self, timeout=None):

661

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

662

if timeout is None:

663

timeout = self.timeout

664

if self.disable_initiator_tag is not None:

665

gobject.source_remove(self.disable_initiator_tag)

666

self.disable_initiator_tag = None

667

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

668

self.disable_initiator_tag = (gobject.timeout_add

669

(timedelta_to_milliseconds

670

(timeout), self.disable))

671

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

446

672

447

673

def need_approval(self):

448

674

self.last_approval_request = datetime.datetime.utcnow()

453

679

If a checker already exists, leave it running and do

454

680

nothing."""

455

681

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

456

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

457

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

458

# client would inevitably timeout, since no checker would get

459

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

682

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

683

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

684

# would inevitably timeout, since no checker would get a

685

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

460

686

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

461

687

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

462

688

# should be.

464

690

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

465

691

try:

466

692

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

467

except (AttributeError, OSError) as error:

468

if (isinstance(error, OSError)

469

and error.errno != errno.ECHILD):

470

raise error

693

except AttributeError:

694

pass

695

except OSError as error:

696

if error.errno != errno.ECHILD:

697

raise

471

698

else:

472

699

if pid:

473

700

logger.warning("Checker was a zombie")

476

703

self.current_checker_command)

477

704

# Start a new checker if needed

478

705

if self.checker is None:

706

# Escape attributes for the shell

707

escaped_attrs = dict(

708

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

709

for attr in

710

self.runtime_expansions)

479

711

try:

480

# In case checker_command has exactly one % operator

481

command = self.checker_command % self.host

482

except TypeError:

483

# Escape attributes for the shell

484

escaped_attrs = dict(

485

(attr,

486

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

487

errors=

488

'replace')))

489

for attr in

490

self.runtime_expansions)

491

492

try:

493

command = self.checker_command % escaped_attrs

494

except TypeError as error:

495

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

496

' %s', self.checker_command, error)

497

return True # Try again later

712

command = self.checker_command % escaped_attrs

713

except TypeError as error:

714

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

715

self.checker_command, exc_info=error)

716

return True # Try again later

498

717

self.current_checker_command = command

499

718

try:

500

719

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

503

722

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

504

723

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

505

724

# always replaced by /dev/null.)

725

# The exception is when not debugging but nevertheless

726

# running in the foreground; use the previously

727

# created wnull.

728

popen_args = {}

729

if (not self.server_settings["debug"]

730

and self.server_settings["foreground"]):

731

popen_args.update({"stdout": wnull,

732

"stderr": wnull })

506

733

self.checker = subprocess.Popen(command,

507

734

close_fds=True,

508

shell=True, cwd="/")

509

self.checker_callback_tag = (gobject.child_watch_add

510

(self.checker.pid,

511

self.checker_callback,

512

data=command))

513

# The checker may have completed before the gobject

514

# watch was added. Check for this.

735

shell=True, cwd="/",

736

**popen_args)

737

except OSError as error:

738

logger.error("Failed to start subprocess",

739

exc_info=error)

740

return True

741

self.checker_callback_tag = (gobject.child_watch_add

742

(self.checker.pid,

743

self.checker_callback,

744

data=command))

745

# The checker may have completed before the gobject

746

# watch was added. Check for this.

747

try:

515

748

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

516

if pid:

517

gobject.source_remove(self.checker_callback_tag)

518

self.checker_callback(pid, status, command)

519

749

except OSError as error:

520

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

521

error)

750

if error.errno == errno.ECHILD:

751

# This should never happen

752

logger.error("Child process vanished",

753

exc_info=error)

754

return True

755

raise

756

if pid:

757

gobject.source_remove(self.checker_callback_tag)

758

self.checker_callback(pid, status, command)

522

759

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

523

760

return True

524

761

531

768

return

532

769

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

533

770

try:

534

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

771

self.checker.terminate()

535

772

#time.sleep(0.5)

536

773

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

537

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

774

# self.checker.kill()

538

775

except OSError as error:

539

776

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

540

777

raise

541

778

self.checker = None

542

779

780

543

781

def dbus_service_property(dbus_interface, signature="v",

544

782

access="readwrite", byte_arrays=False):

545

783

"""Decorators for marking methods of a DBusObjectWithProperties to

556

794

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

557

795

if byte_arrays and signature != "ay":

558

796

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

559

" signature %r" % signature)

797

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

560

798

def decorator(func):

561

799

func._dbus_is_property = True

562

800

func._dbus_interface = dbus_interface

570

808

return decorator

571

809

572

810

811

def dbus_interface_annotations(dbus_interface):

812

"""Decorator for marking functions returning interface annotations

813

814

Usage:

815

816

@dbus_interface_annotations("org.example.Interface")

817

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

818

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

819

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

820

"false"}

821

"""

822

def decorator(func):

823

func._dbus_is_interface = True

824

func._dbus_interface = dbus_interface

825

func._dbus_name = dbus_interface

826

return func

827

return decorator

828

829

830

def dbus_annotations(annotations):

831

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

832

Usage:

833

834

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

835

access="r")

836

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

837

"org.freedesktop.DBus.Property."

838

"EmitsChangedSignal": "false"})

839

def Property_dbus_property(self):

840

return dbus.Boolean(False)

841

"""

842

def decorator(func):

843

func._dbus_annotations = annotations

844

return func

845

return decorator

846

847

573

848

class DBusPropertyException(dbus.exceptions.DBusException):

574

849

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

575

850

"""

591

866

592

867

class DBusObjectWithProperties(dbus.service.Object):

593

868

"""A D-Bus object with properties.

594

869

595

870

Classes inheriting from this can use the dbus_service_property

596

871

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

597

872

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

598

873

"""

599

874

600

875

@staticmethod

601

def _is_dbus_property(obj):

602

return getattr(obj, "_dbus_is_property", False)

876

def _is_dbus_thing(thing):

877

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

878

879

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

880

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

881

"""

882

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

883

False)

603

884

604

def _get_all_dbus_properties(self):

885

def _get_all_dbus_things(self, thing):

605

886

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

606

887

"""

607

return ((prop._dbus_name, prop)

608

for name, prop in

609

inspect.getmembers(self, self._is_dbus_property))

888

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

889

name),

890

athing.__get__(self))

891

for cls in self.__class__.__mro__

892

for name, athing in

893

inspect.getmembers(cls,

894

self._is_dbus_thing(thing)))

610

895

611

896

def _get_dbus_property(self, interface_name, property_name):

612

897

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

613

898

property with the specified name and interface.

614

899

"""

615

for name in (property_name,

616

property_name + "_dbus_property"):

617

prop = getattr(self, name, None)

618

if (prop is None

619

or not self._is_dbus_property(prop)

620

or prop._dbus_name != property_name

621

or (interface_name and prop._dbus_interface

622

and interface_name != prop._dbus_interface)):

623

continue

624

return prop

900

for cls in self.__class__.__mro__:

901

for name, value in (inspect.getmembers

902

(cls,

903

self._is_dbus_thing("property"))):

904

if (value._dbus_name == property_name

905

and value._dbus_interface == interface_name):

906

return value.__get__(self)

907

625

908

# No such property

626

909

raise DBusPropertyNotFound(self.dbus_object_path + ":"

627

910

+ interface_name + "."

652

935

# signatures other than "ay".

653

936

if prop._dbus_signature != "ay":

654

937

raise ValueError

655

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

656

for byte in value))

938

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

939

for byte in value))

657

940

prop(value)

658

941

659

942

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

661

944

def GetAll(self, interface_name):

662

945

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

663

946

standard.

664

947

665

948

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

666

949

"""

667

all = {}

668

for name, prop in self._get_all_dbus_properties():

950

properties = {}

951

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

669

952

if (interface_name

670

953

and interface_name != prop._dbus_interface):

671

954

# Interface non-empty but did not match

675

958

continue

676

959

value = prop()

677

960

if not hasattr(value, "variant_level"):

678

all[name] = value

961

properties[name] = value

679

962

continue

680

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

681

value.variant_level+1)

682

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

963

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

964

value.variant_level+1)

965

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

683

966

684

967

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

685

968

out_signature="s",

686

969

path_keyword='object_path',

687

970

connection_keyword='connection')

688

971

def Introspect(self, object_path, connection):

689

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

972

"""Overloading of standard D-Bus method.

973

974

Inserts property tags and interface annotation tags.

690

975

"""

691

976

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

692

977

connection)

699

984

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

700

985

return e

701

986

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

987

# Add property tags

702

988

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

703

989

for name, prop

704

in self._get_all_dbus_properties()

990

in self._get_all_dbus_things("property")

705

991

if prop._dbus_interface

706

992

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

707

993

if_tag.appendChild(tag)

994

# Add annotation tags

995

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

996

for tag in if_tag.getElementsByTagName(typ):

997

annots = dict()

998

for name, prop in (self.

999

_get_all_dbus_things(typ)):

1000

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

1001

and prop._dbus_interface

1002

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

1003

annots.update(getattr

1004

(prop,

1005

"_dbus_annotations",

1006

{}))

1007

for name, value in annots.iteritems():

1008

ann_tag = document.createElement(

1009

"annotation")

1010

ann_tag.setAttribute("name", name)

1011

ann_tag.setAttribute("value", value)

1012

tag.appendChild(ann_tag)

1013

# Add interface annotation tags

1014

for annotation, value in dict(

1015

itertools.chain.from_iterable(

1016

annotations().iteritems()

1017

for name, annotations in

1018

self._get_all_dbus_things("interface")

1019

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

1020

)).iteritems():

1021

ann_tag = document.createElement("annotation")

1022

ann_tag.setAttribute("name", annotation)

1023

ann_tag.setAttribute("value", value)

1024

if_tag.appendChild(ann_tag)

708

1025

# Add the names to the return values for the

709

1026

# "org.freedesktop.DBus.Properties" methods

710

1027

if (if_tag.getAttribute("name")

725

1042

except (AttributeError, xml.dom.DOMException,

726

1043

xml.parsers.expat.ExpatError) as error:

727

1044

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

728

error)

1045

exc_info=error)

729

1046

return xmlstring

730

1047

731

1048

1049

def datetime_to_dbus(dt, variant_level=0):

1050

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

1051

if dt is None:

1052

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

1053

return dbus.String(dt.isoformat(),

1054

variant_level=variant_level)

1055

1056

1057

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1058

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

1059

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

1060

interface names according to the "alt_interface_names" mapping.

1061

Usage:

1062

1063

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

1064

"net.example.AlternateInterface"})

1065

class SampleDBusObject(dbus.service.Object):

1066

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

1067

def SampleDBusMethod():

1068

pass

1069

1070

The above "SampleDBusMethod" on "SampleDBusObject" will be

1071

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

1072

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

1073

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

1074

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

1075

1076

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

1077

(from DBusObjectWithProperties) and interfaces (from the

1078

dbus_interface_annotations decorator).

1079

"""

1080

def wrapper(cls):

1081

for orig_interface_name, alt_interface_name in (

1082

alt_interface_names.iteritems()):

1083

attr = {}

1084

interface_names = set()

1085

# Go though all attributes of the class

1086

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

1087

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

1088

# with the wrong interface name

1089

if (not hasattr(attribute, "_dbus_interface")

1090

or not attribute._dbus_interface

1091

.startswith(orig_interface_name)):

1092

continue

1093

# Create an alternate D-Bus interface name based on

1094

# the current name

1095

alt_interface = (attribute._dbus_interface

1096

.replace(orig_interface_name,

1097

alt_interface_name))

1098

interface_names.add(alt_interface)

1099

# Is this a D-Bus signal?

1100

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

1101

# Extract the original non-method undecorated

1102

# function by black magic

1103

nonmethod_func = (dict(

1104

zip(attribute.func_code.co_freevars,

1105

attribute.__closure__))["func"]

1106

.cell_contents)

1107

# Create a new, but exactly alike, function

1108

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

1109

# with the alternate D-Bus interface name

1110

new_function = (dbus.service.signal

1111

(alt_interface,

1112

attribute._dbus_signature)

1113

(types.FunctionType(

1114

nonmethod_func.func_code,

1115

nonmethod_func.func_globals,

1116

nonmethod_func.func_name,

1117

nonmethod_func.func_defaults,

1118

nonmethod_func.func_closure)))

1119

# Copy annotations, if any

1120

try:

1121

new_function._dbus_annotations = (

1122

dict(attribute._dbus_annotations))

1123

except AttributeError:

1124

pass

1125

# Define a creator of a function to call both the

1126

# original and alternate functions, so both the

1127

# original and alternate signals gets sent when

1128

# the function is called

1129

def fixscope(func1, func2):

1130

"""This function is a scope container to pass

1131

func1 and func2 to the "call_both" function

1132

outside of its arguments"""

1133

def call_both(*args, **kwargs):

1134

"""This function will emit two D-Bus

1135

signals by calling func1 and func2"""

1136

func1(*args, **kwargs)

1137

func2(*args, **kwargs)

1138

return call_both

1139

# Create the "call_both" function and add it to

1140

# the class

1141

attr[attrname] = fixscope(attribute, new_function)

1142

# Is this a D-Bus method?

1143

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

1144

# Create a new, but exactly alike, function

1145

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

1146

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

1147

# to the class.

1148

attr[attrname] = (dbus.service.method

1149

(alt_interface,

1150

attribute._dbus_in_signature,

1151

attribute._dbus_out_signature)

1152

(types.FunctionType

1153

(attribute.func_code,

1154

attribute.func_globals,

1155

attribute.func_name,

1156

attribute.func_defaults,

1157

attribute.func_closure)))

1158

# Copy annotations, if any

1159

try:

1160

attr[attrname]._dbus_annotations = (

1161

dict(attribute._dbus_annotations))

1162

except AttributeError:

1163

pass

1164

# Is this a D-Bus property?

1165

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

1166

# Create a new, but exactly alike, function

1167

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

1168

# property with the alternate D-Bus interface

1169

# name. Add it to the class.

1170

attr[attrname] = (dbus_service_property

1171

(alt_interface,

1172

attribute._dbus_signature,

1173

attribute._dbus_access,

1174

attribute

1175

._dbus_get_args_options

1176

["byte_arrays"])

1177

(types.FunctionType

1178

(attribute.func_code,

1179

attribute.func_globals,

1180

attribute.func_name,

1181

attribute.func_defaults,

1182

attribute.func_closure)))

1183

# Copy annotations, if any

1184

try:

1185

attr[attrname]._dbus_annotations = (

1186

dict(attribute._dbus_annotations))

1187

except AttributeError:

1188

pass

1189

# Is this a D-Bus interface?

1190

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

1191

# Create a new, but exactly alike, function

1192

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

1193

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

1194

# to the class.

1195

attr[attrname] = (dbus_interface_annotations

1196

(alt_interface)

1197

(types.FunctionType

1198

(attribute.func_code,

1199

attribute.func_globals,

1200

attribute.func_name,

1201

attribute.func_defaults,

1202

attribute.func_closure)))

1203

if deprecate:

1204

# Deprecate all alternate interfaces

1205

iname="_AlternateDBusNames_interface_annotation{0}"

1206

for interface_name in interface_names:

1207

@dbus_interface_annotations(interface_name)

1208

def func(self):

1209

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

1210

"true" }

1211

# Find an unused name

1212

for aname in (iname.format(i)

1213

for i in itertools.count()):

1214

if aname not in attr:

1215

attr[aname] = func

1216

break

1217

if interface_names:

1218

# Replace the class with a new subclass of it with

1219

# methods, signals, etc. as created above.

1220

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

1221

(cls,), attr)

1222

return cls

1223

return wrapper

1224

1225

1226

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

1227

"se.bsnet.fukt.Mandos"})

732

1228

class ClientDBus(Client, DBusObjectWithProperties):

733

1229

"""A Client class using D-Bus

734

1230

743

1239

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

744

1240

745

1241

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

746

self._approvals_pending = 0

747

1242

self.bus = bus

748

1243

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

749

1244

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

755

1250

("/clients/" + client_object_name))

756

1251

DBusObjectWithProperties.__init__(self, self.bus,

757

1252

self.dbus_object_path)

758

759

def _get_approvals_pending(self):

760

return self._approvals_pending

761

def _set_approvals_pending(self, value):

762

old_value = self._approvals_pending

763

self._approvals_pending = value

764

bval = bool(value)

765

if (hasattr(self, "dbus_object_path")

766

and bval is not bool(old_value)):

767

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

768

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

769

dbus_bool)

770

771

approvals_pending = property(_get_approvals_pending,

772

_set_approvals_pending)

773

del _get_approvals_pending, _set_approvals_pending

774

775

@staticmethod

776

def _datetime_to_dbus(dt, variant_level=0):

777

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

778

return dbus.String(dt.isoformat(),

779

variant_level=variant_level)

780

781

def enable(self):

782

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

783

r = Client.enable(self)

784

if oldstate != self.enabled:

785

# Emit D-Bus signals

786

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

787

dbus.Boolean(True, variant_level=1))

788

self.PropertyChanged(

789

dbus.String("LastEnabled"),

790

self._datetime_to_dbus(self.last_enabled,

791

variant_level=1))

792

return r

793

794

def disable(self, quiet = False):

795

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

796

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

797

if not quiet and oldstate != self.enabled:

798

# Emit D-Bus signal

799

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

800

dbus.Boolean(False, variant_level=1))

801

return r

1253

1254

def notifychangeproperty(transform_func,

1255

dbus_name, type_func=lambda x: x,

1256

variant_level=1):

1257

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

1258

its changes to DBus.

1259

1260

transform_fun: Function that takes a value and a variant_level

1261

and transforms it to a D-Bus type.

1262

dbus_name: D-Bus name of the variable

1263

type_func: Function that transform the value before sending it

1264

to the D-Bus. Default: no transform

1265

variant_level: D-Bus variant level. Default: 1

1266

"""

1267

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

1268

def setter(self, value):

1269

if hasattr(self, "dbus_object_path"):

1270

if (not hasattr(self, attrname) or

1271

type_func(getattr(self, attrname, None))

1272

!= type_func(value)):

1273

dbus_value = transform_func(type_func(value),

1274

variant_level

1275

=variant_level)

1276

self.PropertyChanged(dbus.String(dbus_name),

1277

dbus_value)

1278

setattr(self, attrname, value)

1279

1280

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

1281

1282

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1283

approvals_pending = notifychangeproperty(dbus.Boolean,

1284

"ApprovalPending",

1285

type_func = bool)

1286

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

1287

last_enabled = notifychangeproperty(datetime_to_dbus,

1288

"LastEnabled")

1289

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

1290

type_func = lambda checker:

1291

checker is not None)

1292

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1293

"LastCheckedOK")

1294

last_checker_status = notifychangeproperty(dbus.Int16,

1295

"LastCheckerStatus")

1296

last_approval_request = notifychangeproperty(

1297

datetime_to_dbus, "LastApprovalRequest")

1298

approved_by_default = notifychangeproperty(dbus.Boolean,

1299

"ApprovedByDefault")

1300

approval_delay = notifychangeproperty(dbus.UInt64,

1301

"ApprovalDelay",

1302

type_func =

1303

timedelta_to_milliseconds)

1304

approval_duration = notifychangeproperty(

1305

dbus.UInt64, "ApprovalDuration",

1306

type_func = timedelta_to_milliseconds)

1307

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

1308

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

1309

type_func =

1310

timedelta_to_milliseconds)

1311

extended_timeout = notifychangeproperty(

1312

dbus.UInt64, "ExtendedTimeout",

1313

type_func = timedelta_to_milliseconds)

1314

interval = notifychangeproperty(dbus.UInt64,

1315

"Interval",

1316

type_func =

1317

timedelta_to_milliseconds)

1318

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

1319

1320

del notifychangeproperty

802

1321

803

1322

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

804

1323

try:

813

1332

*args, **kwargs):

814

1333

self.checker_callback_tag = None

815

1334

self.checker = None

816

# Emit D-Bus signal

817

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

818

dbus.Boolean(False, variant_level=1))

819

1335

if os.WIFEXITED(condition):

820

1336

exitstatus = os.WEXITSTATUS(condition)

821

1337

# Emit D-Bus signal

831

1347

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

832

1348

*args, **kwargs)

833

1349

834

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

835

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

836

# Emit D-Bus signal

837

self.PropertyChanged(

838

dbus.String("LastCheckedOK"),

839

(self._datetime_to_dbus(self.last_checked_ok,

840

variant_level=1)))

841

842

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

843

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

844

# Emit D-Bus signal

845

self.PropertyChanged(

846

dbus.String("LastApprovalRequest"),

847

(self._datetime_to_dbus(self.last_approval_request,

848

variant_level=1)))

849

return r

850

851

1350

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

852

1351

old_checker = self.checker

853

1352

if self.checker is not None:

860

1359

and old_checker_pid != self.checker.pid):

861

1360

# Emit D-Bus signal

862

1361

self.CheckerStarted(self.current_checker_command)

863

self.PropertyChanged(

864

dbus.String("CheckerRunning"),

865

dbus.Boolean(True, variant_level=1))

866

1362

return r

867

1363

868

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

869

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

870

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

871

if (old_checker is not None

872

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

873

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

874

dbus.Boolean(False, variant_level=1))

875

return r

876

877

1364

def _reset_approved(self):

878

self._approved = None

1365

self.approved = None

879

1366

return False

880

1367

881

1368

def approve(self, value=True):

882

self.send_changedstate()

883

self._approved = value

884

gobject.timeout_add(self._timedelta_to_milliseconds

1369

self.approved = value

1370

gobject.timeout_add(timedelta_to_milliseconds

885

1371

(self.approval_duration),

886

1372

self._reset_approved)

887

1373

self.send_changedstate()

888

1374

889

1375

## D-Bus methods, signals & properties

890

_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"}

891

1384

892

1385

## Signals

893

1386

979

1472

if value is None: # get

980

1473

return dbus.Boolean(self.approved_by_default)

981

1474

self.approved_by_default = bool(value)

982

# Emit D-Bus signal

983

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

984

dbus.Boolean(value, variant_level=1))

985

1475

986

1476

# ApprovalDelay - property

987

1477

@dbus_service_property(_interface, signature="t",

990

1480

if value is None: # get

991

1481

return dbus.UInt64(self.approval_delay_milliseconds())

992

1482

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

993

# Emit D-Bus signal

994

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

995

dbus.UInt64(value, variant_level=1))

996

1483

997

1484

# ApprovalDuration - property

998

1485

@dbus_service_property(_interface, signature="t",

999

1486

access="readwrite")

1000

1487

def ApprovalDuration_dbus_property(self, value=None):

1001

1488

if value is None: # get

1002

return dbus.UInt64(self._timedelta_to_milliseconds(

1489

return dbus.UInt64(timedelta_to_milliseconds(

1003

1490

self.approval_duration))

1004

1491

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

1005

# Emit D-Bus signal

1006

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

1007

dbus.UInt64(value, variant_level=1))

1008

1492

1009

1493

# Name - property

1010

1494

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

1022

1506

def Host_dbus_property(self, value=None):

1023

1507

if value is None: # get

1024

1508

return dbus.String(self.host)

1025

self.host = value

1026

# Emit D-Bus signal

1027

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

1028

dbus.String(value, variant_level=1))

1509

self.host = unicode(value)

1029

1510

1030

1511

# Created - property

1031

1512

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

1032

1513

def Created_dbus_property(self):

1033

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

1514

return datetime_to_dbus(self.created)

1034

1515

1035

1516

# LastEnabled - property

1036

1517

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

1037

1518

def LastEnabled_dbus_property(self):

1038

if self.last_enabled is None:

1039

return dbus.String("")

1040

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

1519

return datetime_to_dbus(self.last_enabled)

1041

1520

1042

1521

# Enabled - property

1043

1522

@dbus_service_property(_interface, signature="b",

1057

1536

if value is not None:

1058

1537

self.checked_ok()

1059

1538

return

1060

if self.last_checked_ok is None:

1061

return dbus.String("")

1062

return dbus.String(self._datetime_to_dbus(self

1063

.last_checked_ok))

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)

1064

1551

1065

1552

# LastApprovalRequest - property

1066

1553

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

1067

1554

def LastApprovalRequest_dbus_property(self):

1068

if self.last_approval_request is None:

1069

return dbus.String("")

1070

return dbus.String(self.

1071

_datetime_to_dbus(self

1072

.last_approval_request))

1555

return datetime_to_dbus(self.last_approval_request)

1073

1556

1074

1557

# Timeout - property

1075

1558

@dbus_service_property(_interface, signature="t",

1077

1560

def Timeout_dbus_property(self, value=None):

1078

1561

if value is None: # get

1079

1562

return dbus.UInt64(self.timeout_milliseconds())

1563

old_timeout = self.timeout

1080

1564

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

1081

# Emit D-Bus signal

1082

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

1083

dbus.UInt64(value, variant_level=1))

1084

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

1085

return

1086

# Reschedule timeout

1087

gobject.source_remove(self.disable_initiator_tag)

1088

self.disable_initiator_tag = None

1089

time_to_die = (self.

1090

_timedelta_to_milliseconds((self

1091

.last_checked_ok

1092

+ self.timeout)

1093

- datetime.datetime

1094

.utcnow()))

1095

if time_to_die <= 0:

1096

# The timeout has passed

1097

self.disable()

1098

else:

1099

self.disable_initiator_tag = (gobject.timeout_add

1100

(time_to_die, self.disable))

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)

1101

1589

1102

1590

# Interval - property

1103

1591

@dbus_service_property(_interface, signature="t",

1106

1594

if value is None: # get

1107

1595

return dbus.UInt64(self.interval_milliseconds())

1108

1596

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

1109

# Emit D-Bus signal

1110

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

1111

dbus.UInt64(value, variant_level=1))

1112

1597

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

1113

1598

return

1114

# Reschedule checker run

1115

gobject.source_remove(self.checker_initiator_tag)

1116

self.checker_initiator_tag = (gobject.timeout_add

1117

(value, self.start_checker))

1118

self.start_checker() # Start one now, too

1119

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

1120

1606

# Checker - property

1121

1607

@dbus_service_property(_interface, signature="s",

1122

1608

access="readwrite")

1123

1609

def Checker_dbus_property(self, value=None):

1124

1610

if value is None: # get

1125

1611

return dbus.String(self.checker_command)

1126

self.checker_command = value

1127

# Emit D-Bus signal

1128

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

1129

dbus.String(self.checker_command,

1130

variant_level=1))

1612

self.checker_command = unicode(value)

1131

1613

1132

1614

# CheckerRunning - property

1133

1615

@dbus_service_property(_interface, signature="b",

1160

1642

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

1161

1643

if not self._pipe.recv():

1162

1644

raise KeyError()

1163

1645

1164

1646

def __getattribute__(self, name):

1165

if(name == '_pipe'):

1647

if name == '_pipe':

1166

1648

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

1167

1649

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

1168

1650

data = self._pipe.recv()

1173

1655

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

1174

1656

return self._pipe.recv()[1]

1175

1657

return func

1176

1658

1177

1659

def __setattr__(self, name, value):

1178

if(name == '_pipe'):

1660

if name == '_pipe':

1179

1661

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

1180

1662

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

1181

1663

1192

1674

unicode(self.client_address))

1193

1675

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

1194

1676

self.server.child_pipe.fileno())

1195

1677

1196

1678

session = (gnutls.connection

1197

1679

.ClientSession(self.request,

1198

1680

gnutls.connection

1199

1681

.X509Credentials()))

1200

1682

1201

1683

# Note: gnutls.connection.X509Credentials is really a

1202

1684

# generic GnuTLS certificate credentials object so long as

1203

1685

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

1204

1686

# here despite using OpenPGP certificates.

1205

1687

1206

1688

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

1207

1689

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

1208

1690

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

1214

1696

(gnutls.library.functions

1215

1697

.gnutls_priority_set_direct(session._c_object,

1216

1698

priority, None))

1217

1699

1218

1700

# Start communication using the Mandos protocol

1219

1701

# Get protocol number

1220

1702

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

1221

1703

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

1222

1704

try:

1223

1705

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

1224

raise RuntimeError

1706

raise RuntimeError(line)

1225

1707

except (ValueError, IndexError, RuntimeError) as error:

1226

1708

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

1227

1709

return

1228

1710

1229

1711

# Start GnuTLS connection

1230

1712

try:

1231

1713

session.handshake()

1235

1717

# established. Just abandon the request.

1236

1718

return

1237

1719

logger.debug("Handshake succeeded")

1238

1720

1239

1721

approval_required = False

1240

1722

try:

1241

1723

try:

1246

1728

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

1247

1729

return

1248

1730

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

1249

1731

1250

1732

try:

1251

1733

client = ProxyClient(child_pipe, fpr,

1252

1734

self.client_address)

1260

1742

1261

1743

while True:

1262

1744

if not client.enabled:

1263

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

1745

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

1264

1746

client.name)

1265

1747

if self.server.use_dbus:

1266

1748

# Emit D-Bus signal

1267

client.Rejected("Disabled")

1749

client.Rejected("Disabled")

1268

1750

return

1269

1751

1270

if client._approved or not client.approval_delay:

1752

if client.approved or not client.approval_delay:

1271

1753

#We are approved or approval is disabled

1272

1754

break

1273

elif client._approved is None:

1755

elif client.approved is None:

1274

1756

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

1275

1757

client.name)

1276

1758

if self.server.use_dbus:

1287

1769

return

1288

1770

1289

1771

#wait until timeout or approved

1290

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

1291

1772

time = datetime.datetime.now()

1292

1773

client.changedstate.acquire()

1293

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

1774

client.changedstate.wait(

1775

float(timedelta_to_milliseconds(delay)

1776

/ 1000))

1294

1777

client.changedstate.release()

1295

1778

time2 = datetime.datetime.now()

1296

1779

if (time2 - time) >= delay:

1312

1795

try:

1313

1796

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

1314

1797

except gnutls.errors.GNUTLSError as error:

1315

logger.warning("gnutls send failed")

1798

logger.warning("gnutls send failed",

1799

exc_info=error)

1316

1800

return

1317

1801

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

1318

1802

sent, len(client.secret)

1319

1803

- (sent_size + sent))

1320

1804

sent_size += sent

1321

1805

1322

1806

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

1323

# bump the timeout as if seen

1324

client.checked_ok()

1807

# bump the timeout using extended_timeout

1808

client.bump_timeout(client.extended_timeout)

1325

1809

if self.server.use_dbus:

1326

1810

# Emit D-Bus signal

1327

1811

client.GotSecret()

1332

1816

try:

1333

1817

session.bye()

1334

1818

except gnutls.errors.GNUTLSError as error:

1335

logger.warning("GnuTLS bye failed")

1819

logger.warning("GnuTLS bye failed",

1820

exc_info=error)

1336

1821

1337

1822

@staticmethod

1338

1823

def peer_certificate(session):

1394

1879

# Convert the buffer to a Python bytestring

1395

1880

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

1396

1881

# Convert the bytestring to hexadecimal notation

1397

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

1882

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

1398

1883

return hex_fpr

1399

1884

1400

1885

1403

1888

def sub_process_main(self, request, address):

1404

1889

try:

1405

1890

self.finish_request(request, address)

1406

except:

1891

except Exception:

1407

1892

self.handle_error(request, address)

1408

1893

self.close_request(request)

1409

1894

1410

1895

def process_request(self, request, address):

1411

1896

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

1412

multiprocessing.Process(target = self.sub_process_main,

1413

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

1897

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

1898

args = (request, address))

1899

proc.start()

1900

return proc

1901

1414

1902

1415

1903

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1416

1904

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

1420

1908

This function creates a new pipe in self.pipe

1421

1909

"""

1422

1910

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1423

1424

super(MultiprocessingMixInWithPipe,

1425

self).process_request(request, client_address)

1911

1912

proc = MultiprocessingMixIn.process_request(self, request,

1913

client_address)

1426

1914

self.child_pipe.close()

1427

self.add_pipe(parent_pipe)

1428

1429

def add_pipe(self, parent_pipe):

1915

self.add_pipe(parent_pipe, proc)

1916

1917

def add_pipe(self, parent_pipe, proc):

1430

1918

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

1431

raise NotImplementedError

1919

raise NotImplementedError()

1920

1432

1921

1433

1922

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1434

1923

socketserver.TCPServer, object):

1440

1929

use_ipv6: Boolean; to use IPv6 or not

1441

1930

"""

1442

1931

def __init__(self, server_address, RequestHandlerClass,

1443

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

"""

1444

1936

self.interface = interface

1445

1937

if use_ipv6:

1446

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.

1447

1965

socketserver.TCPServer.__init__(self, server_address,

1448

1966

RequestHandlerClass)

1967

1449

1968

def server_bind(self):

1450

1969

"""This overrides the normal server_bind() function

1451

1970

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

1459

1978

try:

1460

1979

self.socket.setsockopt(socket.SOL_SOCKET,

1461

1980

SO_BINDTODEVICE,

1462

str(self.interface

1463

+ '\0'))

1981

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

1464

1982

except socket.error as error:

1465

if error[0] == errno.EPERM:

1466

logger.error("No permission to"

1467

" bind to interface %s",

1468

self.interface)

1469

elif error[0] == errno.ENOPROTOOPT:

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:

1470

1987

logger.error("SO_BINDTODEVICE not available;"

1471

1988

" cannot bind to interface %s",

1472

1989

self.interface)

1990

elif error.errno == errno.ENODEV:

1991

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

1992

" cannot bind", self.interface)

1473

1993

else:

1474

1994

raise

1475

1995

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

1478

1998

if self.address_family == socket.AF_INET6:

1479

1999

any_address = "::" # in6addr_any

1480

2000

else:

1481

any_address = socket.INADDR_ANY

2001

any_address = "0.0.0.0" # INADDR_ANY

1482

2002

self.server_address = (any_address,

1483

2003

self.server_address[1])

1484

2004

elif not self.server_address[1]:

1505

2025

"""

1506

2026

def __init__(self, server_address, RequestHandlerClass,

1507

2027

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

1508

gnutls_priority=None, use_dbus=True):

2028

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

1509

2029

self.enabled = False

1510

2030

self.clients = clients

1511

2031

if self.clients is None:

1512

self.clients = set()

2032

self.clients = {}

1513

2033

self.use_dbus = use_dbus

1514

2034

self.gnutls_priority = gnutls_priority

1515

2035

IPv6_TCPServer.__init__(self, server_address,

1516

2036

RequestHandlerClass,

1517

2037

interface = interface,

1518

use_ipv6 = use_ipv6)

2038

use_ipv6 = use_ipv6,

2039

socketfd = socketfd)

1519

2040

def server_activate(self):

1520

2041

if self.enabled:

1521

2042

return socketserver.TCPServer.server_activate(self)

2043

1522

2044

def enable(self):

1523

2045

self.enabled = True

1524

def add_pipe(self, parent_pipe):

2046

2047

def add_pipe(self, parent_pipe, proc):

1525

2048

# Call "handle_ipc" for both data and EOF events

1526

2049

gobject.io_add_watch(parent_pipe.fileno(),

1527

2050

gobject.IO_IN | gobject.IO_HUP,

1528

2051

functools.partial(self.handle_ipc,

1529

parent_pipe = parent_pipe))

1530

2052

parent_pipe =

2053

parent_pipe,

2054

proc = proc))

2055

1531

2056

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

1532

client_object=None):

1533

condition_names = {

1534

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

1535

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

1536

# blocking).

1537

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

1538

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

1539

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

1540

# broken, usually for pipes and

1541

# sockets).

1542

}

1543

conditions_string = ' | '.join(name

1544

for cond, name in

1545

condition_names.iteritems()

1546

if cond & condition)

1547

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

1548

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

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()

1549

2062

return False

1550

2063

1551

2064

# Read a request from the child

1556

2069

fpr = request[1]

1557

2070

address = request[2]

1558

2071

1559

for c in self.clients:

2072

for c in self.clients.itervalues():

1560

2073

if c.fingerprint == fpr:

1561

2074

client = c

1562

2075

break

1563

2076

else:

1564

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

1565

"dress: %s", fpr, address)

2077

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

2078

"dress: %s", fpr, address)

1566

2079

if self.use_dbus:

1567

2080

# Emit D-Bus signal

1568

mandos_dbus_service.ClientNotFound(fpr, address[0])

2081

mandos_dbus_service.ClientNotFound(fpr,

2082

address[0])

1569

2083

parent_pipe.send(False)

1570

2084

return False

1571

2085

1572

2086

gobject.io_add_watch(parent_pipe.fileno(),

1573

2087

gobject.IO_IN | gobject.IO_HUP,

1574

2088

functools.partial(self.handle_ipc,

1575

parent_pipe = parent_pipe,

1576

client_object = client))

2089

parent_pipe =

2090

parent_pipe,

2091

proc = proc,

2092

client_object =

2093

client))

1577

2094

parent_pipe.send(True)

1578

# 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

1579

2097

return False

1580

2098

if command == 'funcall':

1581

2099

funcname = request[1]

1582

2100

args = request[2]

1583

2101

kwargs = request[3]

1584

2102

1585

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

1586

2103

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

2104

funcname)(*args,

2105

**kwargs)))

2106

1587

2107

if command == 'getattr':

1588

2108

attrname = request[1]

1589

2109

if callable(client_object.__getattribute__(attrname)):

1590

2110

parent_pipe.send(('function',))

1591

2111

else:

1592

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

2112

parent_pipe.send(('data', client_object

2113

.__getattribute__(attrname)))

1593

2114

1594

2115

if command == 'setattr':

1595

2116

attrname = request[1]

1596

2117

value = request[2]

1597

2118

setattr(client_object, attrname, value)

1598

2119

1599

2120

return True

1600

2121

1601

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

1602

2222

def string_to_delta(interval):

1603

2223

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

1604

2224

1615

2235

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

1616

2236

datetime.timedelta(0, 330)

1617

2237

"""

2238

2239

try:

2240

return rfc3339_duration_to_delta(interval)

2241

except ValueError:

2242

pass

2243

1618

2244

timevalue = datetime.timedelta(0)

1619

2245

for s in interval.split():

1620

2246

try:

1631

2257

elif suffix == "w":

1632

2258

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

1633

2259

else:

1634

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

1635

except (ValueError, IndexError) as e:

2260

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

2261

.format(suffix))

2262

except IndexError as e:

1636

2263

raise ValueError(*(e.args))

1637

2264

timevalue += delta

1638

2265

return timevalue

1639

2266

1640

2267

1641

def if_nametoindex(interface):

1642

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

1643

1644

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

1645

global if_nametoindex

1646

try:

1647

if_nametoindex = (ctypes.cdll.LoadLibrary

1648

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

1649

.if_nametoindex)

1650

except (OSError, AttributeError):

1651

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

1652

def if_nametoindex(interface):

1653

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

1654

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

1655

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

1656

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1657

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

1658

interface))

1659

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

1660

ifreq[16:20])[0]

1661

return interface_index

1662

return if_nametoindex(interface)

1663

1664

1665

2268

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

1666

2269

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

1667

2270

1675

2278

sys.exit()

1676

2279

if not noclose:

1677

2280

# Close all standard open file descriptors

1678

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

2281

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

1679

2282

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

1680

2283

raise OSError(errno.ENODEV,

1681

"%s not a character device"

1682

% os.path.devnull)

2284

"{0} not a character device"

2285

.format(os.devnull))

1683

2286

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

1684

2287

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

1685

2288

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

1694

2297

1695

2298

parser = argparse.ArgumentParser()

1696

2299

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

1697

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

2300

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

1698

2301

help="show version number and exit")

1699

2302

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

1700

2303

help="Bind to interface IF")

1706

2309

help="Run self-test")

1707

2310

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

1708

2311

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

1709

" to terminal")

2312

" to terminal", default=None)

1710

2313

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

1711

2314

help="Debug level for stdout output")

1712

2315

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

1719

2322

" files")

1720

2323

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

1721

2324

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

1722

" system bus interface")

2325

" system bus interface", default=None)

1723

2326

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

1724

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

1725

2340

options = parser.parse_args()

1726

2341

1727

2342

if options.check:

1735

2350

"port": "",

1736

2351

"debug": "False",

1737

2352

"priority":

1738

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

2353

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

1739

2354

"servicename": "Mandos",

1740

2355

"use_dbus": "True",

1741

2356

"use_ipv6": "True",

1742

2357

"debuglevel": "",

2358

"restore": "True",

2359

"socket": "",

2360

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

2361

"foreground": "False",

1743

2362

}

1744

2363

1745

2364

# Parse config file for server-global settings

1750

2369

# Convert the SafeConfigParser object to a dict

1751

2370

server_settings = server_config.defaults()

1752

2371

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

1753

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

2372

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

1754

2373

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

1755

2374

option)

1756

2375

if server_settings["port"]:

1757

2376

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

1758

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"])

1759

2387

del server_config

1760

2388

1761

2389

# Override the settings from the config file with command line

1762

2390

# options, if set.

1763

2391

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

1764

2392

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

1765

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

2393

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

2394

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

1766

2395

value = getattr(options, option)

1767

2396

if value is not None:

1768

2397

server_settings[option] = value

1771

2400

for option in server_settings.keys():

1772

2401

if type(server_settings[option]) is str:

1773

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

1774

2410

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

1775

2411

1776

2412

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

1780

2416

debuglevel = server_settings["debuglevel"]

1781

2417

use_dbus = server_settings["use_dbus"]

1782

2418

use_ipv6 = server_settings["use_ipv6"]

1783

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

1784

2432

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

1785

2433

syslogger.setFormatter(logging.Formatter

1786

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

1787

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

1788

% server_settings["servicename"]))

2434

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

2435

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

2436

.format(server_settings

2437

["servicename"])))

1789

2438

1790

2439

# Parse config file with clients

1791

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

1792

"interval": "5m",

1793

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

1794

"host": "",

1795

"approval_delay": "0s",

1796

"approval_duration": "1s",

1797

}

1798

client_config = configparser.SafeConfigParser(client_defaults)

2440

client_config = configparser.SafeConfigParser(Client

2441

.client_defaults)

1799

2442

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

1800

2443

"clients.conf"))

1801

2444

1810

2453

use_ipv6=use_ipv6,

1811

2454

gnutls_priority=

1812

2455

server_settings["priority"],

1813

use_dbus=use_dbus)

1814

if not debug:

1815

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

1816

2464

try:

1817

2465

pidfile = open(pidfilename, "w")

1818

except IOError:

1819

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)

1820

2469

1821

try:

1822

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

1823

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

1824

except KeyError:

2470

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

1825

2471

try:

1826

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

1827

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

2472

uid = pwd.getpwnam(name).pw_uid

2473

gid = pwd.getpwnam(name).pw_gid

2474

break

1828

2475

except KeyError:

1829

try:

1830

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

1831

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

1832

except KeyError:

1833

uid = 65534

1834

gid = 65534

2476

continue

2477

else:

2478

uid = 65534

2479

gid = 65534

1835

2480

try:

1836

2481

os.setgid(gid)

1837

2482

os.setuid(uid)

1838

2483

except OSError as error:

1839

if error[0] != errno.EPERM:

1840

raise error

2484

if error.errno != errno.EPERM:

2485

raise

1841

2486

1842

if not debug and not debuglevel:

1843

syslogger.setLevel(logging.WARNING)

1844

console.setLevel(logging.WARNING)

1845

if debuglevel:

1846

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

1847

syslogger.setLevel(level)

1848

console.setLevel(level)

1849

1850

2487

if debug:

1851

2488

# Enable all possible GnuTLS debugging

1852

2489

1862

2499

.gnutls_global_set_log_function(debug_gnutls))

1863

2500

1864

2501

# Redirect stdin so all checkers get /dev/null

1865

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

2502

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

1866

2503

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

1867

2504

if null > 2:

1868

2505

os.close(null)

1869

else:

1870

# No console logging

1871

logger.removeHandler(console)

1872

2506

1873

2507

# Need to fork before connecting to D-Bus

1874

if not debug:

2508

if not foreground:

1875

2509

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

1876

2510

daemon()

1877

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

1878

2516

global main_loop

1879

2517

# From the Avahi example code

1880

DBusGMainLoop(set_as_default=True )

2518

DBusGMainLoop(set_as_default=True)

1881

2519

main_loop = gobject.MainLoop()

1882

2520

bus = dbus.SystemBus()

1883

2521

# End of Avahi example code

1884

2522

if use_dbus:

1885

2523

try:

1886

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

2524

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

1887

2525

bus, do_not_queue=True)

2526

old_bus_name = (dbus.service.BusName

2527

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

2528

do_not_queue=True))

1888

2529

except dbus.exceptions.NameExistsException as e:

1889

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

2530

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

1890

2531

use_dbus = False

1891

2532

server_settings["use_dbus"] = False

1892

2533

tcp_server.use_dbus = False

1893

2534

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1894

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

1895

servicetype = "_mandos._tcp",

1896

protocol = protocol, bus = bus)

2535

service = AvahiServiceToSyslog(name =

2536

server_settings["servicename"],

2537

servicetype = "_mandos._tcp",

2538

protocol = protocol, bus = bus)

1897

2539

if server_settings["interface"]:

1898

2540

service.interface = (if_nametoindex

1899

2541

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

1904

2546

client_class = Client

1905

2547

if use_dbus:

1906

2548

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

1907

def client_config_items(config, section):

1908

special_settings = {

1909

"approved_by_default":

1910

lambda: config.getboolean(section,

1911

"approved_by_default"),

1912

}

1913

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

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))

1914

2631

try:

1915

yield (name, special_settings[name]())

1916

except KeyError:

1917

yield (name, value)

1918

1919

tcp_server.clients.update(set(

1920

client_class(name = section,

1921

config= dict(client_config_items(

1922

client_config, section)))

1923

for section in client_config.sections()))

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

1924

2657

if not tcp_server.clients:

1925

2658

logger.warning("No clients defined")

1926

1927

if not debug:

1928

try:

1929

with pidfile:

1930

pid = os.getpid()

1931

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

1932

del pidfile

1933

except IOError:

1934

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

1935

pidfilename, pid)

1936

except NameError:

1937

# "pidfile" was never created

1938

pass

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

1939

2670

del pidfilename

1940

1941

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

1942

2671

1943

2672

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

1944

2673

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

1945

2674

1946

2675

if use_dbus:

1947

class MandosDBusService(dbus.service.Object):

2676

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

2677

"se.bsnet.fukt.Mandos"})

2678

class MandosDBusService(DBusObjectWithProperties):

1948

2679

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

1949

2680

def __init__(self):

1950

2681

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

1951

_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"}

1952

2689

1953

2690

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

1954

2691

def ClientAdded(self, objpath):

1969

2706

def GetAllClients(self):

1970

2707

"D-Bus method"

1971

2708

return dbus.Array(c.dbus_object_path

1972

for c in tcp_server.clients)

2709

for c in

2710

tcp_server.clients.itervalues())

1973

2711

1974

2712

@dbus.service.method(_interface,

1975

2713

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

1977

2715

"D-Bus method"

1978

2716

return dbus.Dictionary(

1979

2717

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

1980

for c in tcp_server.clients),

2718

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

1981

2719

signature="oa{sv}")

1982

2720

1983

2721

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

1984

2722

def RemoveClient(self, object_path):

1985

2723

"D-Bus method"

1986

for c in tcp_server.clients:

2724

for c in tcp_server.clients.itervalues():

1987

2725

if c.dbus_object_path == object_path:

1988

tcp_server.clients.remove(c)

2726

del tcp_server.clients[c.name]

1989

2727

c.remove_from_connection()

1990

2728

# Don't signal anything except ClientRemoved

1991

2729

c.disable(quiet=True)

2002

2740

"Cleanup function; run on exit"

2003

2741

service.cleanup()

2004

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

2005

2799

while tcp_server.clients:

2006

client = tcp_server.clients.pop()

2800

name, client = tcp_server.clients.popitem()

2007

2801

if use_dbus:

2008

2802

client.remove_from_connection()

2009

client.disable_hook = None

2010

2803

# Don't signal anything except ClientRemoved

2011

2804

client.disable(quiet=True)

2012

2805

if use_dbus:

2013

2806

# Emit D-Bus signal

2014

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2807

mandos_dbus_service.ClientRemoved(client

2808

.dbus_object_path,

2015

2809

client.name)

2810

client_settings.clear()

2016

2811

2017

2812

atexit.register(cleanup)

2018

2813

2019

for client in tcp_server.clients:

2814

for client in tcp_server.clients.itervalues():

2020

2815

if use_dbus:

2021

2816

# Emit D-Bus signal

2022

2817

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2023

client.enable()

2818

# Need to initiate checking of clients

2819

if client.enabled:

2820

client.init_checker()

2024

2821

2025

2822

tcp_server.enable()

2026

2823

tcp_server.server_activate()

2029

2826

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

2030

2827

if use_ipv6:

2031

2828

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

2032

" flowinfo %d, scope_id %d"

2033

% tcp_server.socket.getsockname())

2829

" flowinfo %d, scope_id %d",

2830

*tcp_server.socket.getsockname())

2034

2831

else: # IPv4

2035

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

2036

% tcp_server.socket.getsockname())

2832

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

2833

*tcp_server.socket.getsockname())

2037

2834

2038

2835

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

2039

2836

2042

2839

try:

2043

2840

service.activate()

2044

2841

except dbus.exceptions.DBusException as error:

2045

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

2842

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

2046

2843

cleanup()

2047

2844

sys.exit(1)

2048

2845

# End of Avahi example code

2055

2852

logger.debug("Starting main loop")

2056

2853

main_loop.run()

2057

2854

except AvahiError as error:

2058

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

2855

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

2059

2856

cleanup()

2060

2857

sys.exit(1)

2061

2858

except KeyboardInterrupt: