/mandos/release : revision 237.16.24

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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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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 cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import dbus

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import dbus.service

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.6.0"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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version = "1.4.1"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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

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"""init logger and add loglevel"""

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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

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pass

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class PGPEngine(object):

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

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def __init__(self):

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

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self.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir=self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir = self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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decrypted_plaintext, err = proc.communicate(input

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= data)

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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class AvahiError(Exception):

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

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

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

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

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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.GetAlternativeServiceName(self.name))

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

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self.name)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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def remove(self):

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

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self.entry_group_state_changed))

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'StateChanged', self .entry_group_state_changed))

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

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self.name, self.type)

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self.group.AddService(

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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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unicode(error))

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

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.format(error))

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raise AvahiGroupError("State changed: %s"

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% unicode(error))

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def cleanup(self):

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

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if self.group is not None:

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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException):

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dbus.exceptions.DBusException) as e:

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pass

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self.group = None

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self.remove()

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

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

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

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

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else:

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

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def activate(self):

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

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if self.server is None:

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

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class AvahiServiceToSyslog(AvahiService):

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def rename(self):

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

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ret = AvahiService.rename(self)

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syslogger.setFormatter(logging.Formatter

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

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

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.format(self.name)))

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return ret

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def timedelta_to_milliseconds(td):

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def _timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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class Client(object):

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

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Attributes:

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

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

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

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

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

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

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checker_initiator_tag: a gobject event source tag, or None

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

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client_structure: Object describing what attributes a client has

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and is used for storing the client at exit

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current_checker_command: string; current running checker_command

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

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disable_initiator_tag: a gobject event source tag, or None

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enabled: bool()

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

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

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

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

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last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, -2 means no checker completed yet.

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

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last_enabled: datetime.datetime(); (UTC)

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

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D-Bus identifiers

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

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

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until this client is disabled

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extended_timeout: extra long timeout when secret has been sent

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extended_timeout: extra long timeout when password has been sent

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runtime_expansions: Allowed attributes for runtime expansion.

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expires: datetime.datetime(); time (UTC) when a client will be

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disabled, or None

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"""

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runtime_expansions = ("approval_delay", "approval_duration",

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

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

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"last_approval_request", "last_checked_ok",

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

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

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

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client_defaults = { "timeout": "PT5M",

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"extended_timeout": "PT15M",

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"interval": "PT2M",

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

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"host": "",

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"approval_delay": "PT0S",

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"approval_duration": "PT1S",

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"approved_by_default": "True",

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"enabled": "True",

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}

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def timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.timeout)

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return _timedelta_to_milliseconds(self.timeout)

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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.extended_timeout)

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return _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 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 timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

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def config_parser(config):

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

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

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with exceptions for any special settings as defined above.

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

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value given the same arguments.

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"""

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settings = {}

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for client_name in config.sections():

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section = dict(config.items(client_name))

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client = settings[client_name] = {}

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

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# Reformat values from string types to Python types

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client["approved_by_default"] = config.getboolean(

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client_name, "approved_by_default")

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

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"enabled")

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

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.replace(" ", ""))

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if "secret" in section:

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

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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:

506

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

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.format(section))

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

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client["extended_timeout"] = string_to_delta(

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section["extended_timeout"])

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

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client["approval_delay"] = string_to_delta(

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section["approval_delay"])

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client["approval_duration"] = string_to_delta(

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section["approval_duration"])

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

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client["last_approval_request"] = None

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client["last_checked_ok"] = None

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client["last_checker_status"] = -2

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return settings

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

332

return _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

336

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

337

attribute."""

524

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self.name = name

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# adding all client settings

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for setting, value in settings.iteritems():

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setattr(self, setting, value)

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if self.enabled:

530

if not hasattr(self, "last_enabled"):

531

self.last_enabled = datetime.datetime.utcnow()

532

if not hasattr(self, "expires"):

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

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+ self.timeout)

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else:

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self.last_enabled = None

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self.expires = None

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if config is None:

340

config = {}

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

540

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# Uppercase and remove spaces from fingerprint for later

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# comparison purposes with return value from the fingerprint()

542

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# function

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

346

.replace(" ", ""))

543

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

544

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

545

datetime.datetime.utcnow())

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# attributes specific for this server instance

348

if "secret" in config:

349

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

350

elif "secfile" in config:

351

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

352

(config["secfile"])),

353

"rb") as secfile:

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self.secret = secfile.read()

355

else:

356

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

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% self.name)

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

359

self.created = datetime.datetime.utcnow()

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self.enabled = False

361

self.last_approval_request = None

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self.last_enabled = None

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self.last_checked_ok = None

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

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self.extended_timeout = string_to_delta(config

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["extended_timeout"])

367

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

368

self.disable_hook = disable_hook

548

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self.checker = None

549

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self.checker_initiator_tag = None

550

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self.disable_initiator_tag = None

372

self.expires = None

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self.checker_callback_tag = None

374

self.checker_command = config["checker"]

552

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self.current_checker_command = None

553

self.approved = None

376

self.last_connect = None

377

self._approved = None

378

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

379

True)

554

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self.approvals_pending = 0

381

self.approval_delay = string_to_delta(

382

config["approval_delay"])

383

self.approval_duration = string_to_delta(

384

config["approval_duration"])

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385

self.changedstate = (multiprocessing_manager

556

386

.Condition(multiprocessing_manager

557

387

.Lock()))

558

self.client_structure = [attr for attr in

559

self.__dict__.iterkeys()

560

if not attr.startswith("_")]

561

self.client_structure.append("client_structure")

562

563

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

564

lambda obj:

565

isinstance(obj,

566

property)):

567

if not name.startswith("_"):

568

self.client_structure.append(name)

569

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570

# Send notice to process children that client state has changed

571

389

def send_changedstate(self):

572

with self.changedstate:

573

self.changedstate.notify_all()

390

self.changedstate.acquire()

391

self.changedstate.notify_all()

392

self.changedstate.release()

574

393

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def enable(self):

576

395

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

577

396

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

578

397

# Already enabled

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398

return

580

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

581

self.enabled = True

582

self.last_enabled = datetime.datetime.utcnow()

583

self.init_checker()

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399

self.send_changedstate()

585

586

def disable(self, quiet=True):

587

"""Disable this client."""

588

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

589

return False

590

if not quiet:

591

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

592

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

593

gobject.source_remove(self.disable_initiator_tag)

594

self.disable_initiator_tag = None

595

self.expires = None

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

597

gobject.source_remove(self.checker_initiator_tag)

598

self.checker_initiator_tag = None

599

self.stop_checker()

600

self.enabled = False

601

if not quiet:

602

self.send_changedstate()

603

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

604

return False

605

606

def __del__(self):

607

self.disable()

608

609

def init_checker(self):

610

400

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

611

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# and every interval from then on.

612

if self.checker_initiator_tag is not None:

613

gobject.source_remove(self.checker_initiator_tag)

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402

self.checker_initiator_tag = (gobject.timeout_add

615

403

(self.interval_milliseconds(),

616

404

self.start_checker))

617

405

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

618

if self.disable_initiator_tag is not None:

619

gobject.source_remove(self.disable_initiator_tag)

406

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

620

407

self.disable_initiator_tag = (gobject.timeout_add

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408

(self.timeout_milliseconds(),

622

409

self.disable))

410

self.enabled = True

411

self.last_enabled = datetime.datetime.utcnow()

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412

# Also start a new checker *right now*.

624

413

self.start_checker()

625

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415

def disable(self, quiet=True):

416

"""Disable this client."""

417

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

418

return False

419

if not quiet:

420

self.send_changedstate()

421

if not quiet:

422

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

423

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

424

gobject.source_remove(self.disable_initiator_tag)

425

self.disable_initiator_tag = None

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self.expires = None

427

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

428

gobject.source_remove(self.checker_initiator_tag)

429

self.checker_initiator_tag = None

430

self.stop_checker()

431

if self.disable_hook:

432

self.disable_hook(self)

433

self.enabled = False

434

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

435

return False

436

437

def __del__(self):

438

self.disable_hook = None

439

self.disable()

440

626

441

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

627

442

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

628

443

self.checker_callback_tag = None

629

444

self.checker = None

630

445

if os.WIFEXITED(condition):

631

self.last_checker_status = os.WEXITSTATUS(condition)

632

if self.last_checker_status == 0:

446

exitstatus = os.WEXITSTATUS(condition)

447

if exitstatus == 0:

633

448

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

634

449

vars(self))

635

450

self.checked_ok()

637

452

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

638

453

vars(self))

639

454

else:

640

self.last_checker_status = -1

641

455

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

642

456

vars(self))

643

457

644

def checked_ok(self):

645

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

646

self.last_checked_ok = datetime.datetime.utcnow()

647

self.last_checker_status = 0

648

self.bump_timeout()

649

650

def bump_timeout(self, timeout=None):

651

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

458

def checked_ok(self, timeout=None):

459

"""Bump up the timeout for this client.

460

461

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

462

alive and well.

463

"""

652

464

if timeout is None:

653

465

timeout = self.timeout

466

self.last_checked_ok = datetime.datetime.utcnow()

654

467

if self.disable_initiator_tag is not None:

655

468

gobject.source_remove(self.disable_initiator_tag)

656

self.disable_initiator_tag = None

657

469

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

658

470

self.disable_initiator_tag = (gobject.timeout_add

659

(timedelta_to_milliseconds

471

(_timedelta_to_milliseconds

660

472

(timeout), self.disable))

661

473

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

662

474

669

481

If a checker already exists, leave it running and do

670

482

nothing."""

671

483

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

672

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

673

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

674

# would inevitably timeout, since no checker would get a

675

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

484

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

485

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

486

# client would inevitably timeout, since no checker would get

487

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

676

488

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

677

489

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

678

490

# should be.

692

504

self.current_checker_command)

693

505

# Start a new checker if needed

694

506

if self.checker is None:

695

# Escape attributes for the shell

696

escaped_attrs = dict(

697

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

698

for attr in

699

self.runtime_expansions)

700

507

try:

701

command = self.checker_command % escaped_attrs

702

except TypeError as error:

703

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

704

self.checker_command, exc_info=error)

705

return True # Try again later

508

# In case checker_command has exactly one % operator

509

command = self.checker_command % self.host

510

except TypeError:

511

# Escape attributes for the shell

512

escaped_attrs = dict(

513

(attr,

514

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

515

errors=

516

'replace')))

517

for attr in

518

self.runtime_expansions)

519

520

try:

521

command = self.checker_command % escaped_attrs

522

except TypeError as error:

523

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

524

' %s', self.checker_command, error)

525

return True # Try again later

706

526

self.current_checker_command = command

707

527

try:

708

528

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

714

534

self.checker = subprocess.Popen(command,

715

535

close_fds=True,

716

536

shell=True, cwd="/")

717

except OSError as error:

718

logger.error("Failed to start subprocess",

719

exc_info=error)

720

return True

721

self.checker_callback_tag = (gobject.child_watch_add

722

(self.checker.pid,

723

self.checker_callback,

724

data=command))

725

# The checker may have completed before the gobject

726

# watch was added. Check for this.

727

try:

537

self.checker_callback_tag = (gobject.child_watch_add

538

(self.checker.pid,

539

self.checker_callback,

540

data=command))

541

# The checker may have completed before the gobject

542

# watch was added. Check for this.

728

543

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

544

if pid:

545

gobject.source_remove(self.checker_callback_tag)

546

self.checker_callback(pid, status, command)

729

547

except OSError as error:

730

if error.errno == errno.ECHILD:

731

# This should never happen

732

logger.error("Child process vanished",

733

exc_info=error)

734

return True

735

raise

736

if pid:

737

gobject.source_remove(self.checker_callback_tag)

738

self.checker_callback(pid, status, command)

548

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

549

error)

739

550

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

740

551

return True

741

552

748

559

return

749

560

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

750

561

try:

751

self.checker.terminate()

562

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

752

563

#time.sleep(0.5)

753

564

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

754

# self.checker.kill()

565

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

755

566

except OSError as error:

756

567

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

757

568

raise

774

585

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

775

586

if byte_arrays and signature != "ay":

776

587

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

777

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

588

" signature %r" % signature)

778

589

def decorator(func):

779

590

func._dbus_is_property = True

780

591

func._dbus_interface = dbus_interface

788

599

return decorator

789

600

790

601

791

def dbus_interface_annotations(dbus_interface):

792

"""Decorator for marking functions returning interface annotations

793

794

Usage:

795

796

@dbus_interface_annotations("org.example.Interface")

797

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

798

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

799

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

800

"false"}

801

"""

802

def decorator(func):

803

func._dbus_is_interface = True

804

func._dbus_interface = dbus_interface

805

func._dbus_name = dbus_interface

806

return func

807

return decorator

808

809

810

def dbus_annotations(annotations):

811

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

812

Usage:

813

814

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

815

access="r")

816

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

817

"org.freedesktop.DBus.Property."

818

"EmitsChangedSignal": "false"})

819

def Property_dbus_property(self):

820

return dbus.Boolean(False)

821

"""

822

def decorator(func):

823

func._dbus_annotations = annotations

824

return func

825

return decorator

826

827

828

602

class DBusPropertyException(dbus.exceptions.DBusException):

829

603

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

830

604

"""

853

627

"""

854

628

855

629

@staticmethod

856

def _is_dbus_thing(thing):

857

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

858

859

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

860

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

861

"""

862

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

863

False)

630

def _is_dbus_property(obj):

631

return getattr(obj, "_dbus_is_property", False)

864

632

865

def _get_all_dbus_things(self, thing):

633

def _get_all_dbus_properties(self):

866

634

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

867

635

"""

868

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

869

name),

870

athing.__get__(self))

636

return ((prop.__get__(self)._dbus_name, prop.__get__(self))

871

637

for cls in self.__class__.__mro__

872

for name, athing in

873

inspect.getmembers(cls,

874

self._is_dbus_thing(thing)))

638

for name, prop in

639

inspect.getmembers(cls, self._is_dbus_property))

875

640

876

641

def _get_dbus_property(self, interface_name, property_name):

877

642

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

879

644

"""

880

645

for cls in self.__class__.__mro__:

881

646

for name, value in (inspect.getmembers

882

(cls,

883

self._is_dbus_thing("property"))):

647

(cls, self._is_dbus_property)):

884

648

if (value._dbus_name == property_name

885

649

and value._dbus_interface == interface_name):

886

650

return value.__get__(self)

915

679

# signatures other than "ay".

916

680

if prop._dbus_signature != "ay":

917

681

raise ValueError

918

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

919

for byte in value))

682

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

683

for byte in value))

920

684

prop(value)

921

685

922

686

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

927

691

928

692

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

929

693

"""

930

properties = {}

931

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

694

all = {}

695

for name, prop in self._get_all_dbus_properties():

932

696

if (interface_name

933

697

and interface_name != prop._dbus_interface):

934

698

# Interface non-empty but did not match

938

702

continue

939

703

value = prop()

940

704

if not hasattr(value, "variant_level"):

941

properties[name] = value

705

all[name] = value

942

706

continue

943

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

944

value.variant_level+1)

945

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

707

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

708

value.variant_level+1)

709

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

946

710

947

711

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

948

712

out_signature="s",

949

713

path_keyword='object_path',

950

714

connection_keyword='connection')

951

715

def Introspect(self, object_path, connection):

952

"""Overloading of standard D-Bus method.

953

954

Inserts property tags and interface annotation tags.

716

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

955

717

"""

956

718

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

957

719

connection)

964

726

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

965

727

return e

966

728

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

967

# Add property tags

968

729

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

969

730

for name, prop

970

in self._get_all_dbus_things("property")

731

in self._get_all_dbus_properties()

971

732

if prop._dbus_interface

972

733

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

973

734

if_tag.appendChild(tag)

974

# Add annotation tags

975

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

976

for tag in if_tag.getElementsByTagName(typ):

977

annots = dict()

978

for name, prop in (self.

979

_get_all_dbus_things(typ)):

980

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

981

and prop._dbus_interface

982

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

983

annots.update(getattr

984

(prop,

985

"_dbus_annotations",

986

{}))

987

for name, value in annots.iteritems():

988

ann_tag = document.createElement(

989

"annotation")

990

ann_tag.setAttribute("name", name)

991

ann_tag.setAttribute("value", value)

992

tag.appendChild(ann_tag)

993

# Add interface annotation tags

994

for annotation, value in dict(

995

itertools.chain.from_iterable(

996

annotations().iteritems()

997

for name, annotations in

998

self._get_all_dbus_things("interface")

999

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

1000

)).iteritems():

1001

ann_tag = document.createElement("annotation")

1002

ann_tag.setAttribute("name", annotation)

1003

ann_tag.setAttribute("value", value)

1004

if_tag.appendChild(ann_tag)

1005

735

# Add the names to the return values for the

1006

736

# "org.freedesktop.DBus.Properties" methods

1007

737

if (if_tag.getAttribute("name")

1022

752

except (AttributeError, xml.dom.DOMException,

1023

753

xml.parsers.expat.ExpatError) as error:

1024

754

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

1025

exc_info=error)

755

error)

1026

756

return xmlstring

1027

757

1028

758

1029

def datetime_to_dbus(dt, variant_level=0):

759

def datetime_to_dbus (dt, variant_level=0):

1030

760

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

1031

761

if dt is None:

1032

762

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

1033

763

return dbus.String(dt.isoformat(),

1034

764

variant_level=variant_level)

1035

765

1036

1037

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1038

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

1039

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

1040

interface names according to the "alt_interface_names" mapping.

1041

Usage:

1042

1043

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

1044

"net.example.AlternateInterface"})

1045

class SampleDBusObject(dbus.service.Object):

1046

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

1047

def SampleDBusMethod():

1048

pass

1049

1050

The above "SampleDBusMethod" on "SampleDBusObject" will be

1051

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

1052

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

1053

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

1054

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

1055

1056

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

1057

(from DBusObjectWithProperties) and interfaces (from the

1058

dbus_interface_annotations decorator).

766

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

767

.__metaclass__):

768

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

769

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

1059

770

"""

1060

def wrapper(cls):

1061

for orig_interface_name, alt_interface_name in (

1062

alt_interface_names.iteritems()):

1063

attr = {}

1064

interface_names = set()

1065

# Go though all attributes of the class

1066

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

771

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

772

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

773

# methods, signals, or properties in them

774

for base in (b for b in bases

775

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

776

# Go though all attributes of the base class

777

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

1067

778

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

1068

779

# with the wrong interface name

1069

780

if (not hasattr(attribute, "_dbus_interface")

1070

781

or not attribute._dbus_interface

1071

.startswith(orig_interface_name)):

782

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

1072

783

continue

1073

784

# Create an alternate D-Bus interface name based on

1074

785

# the current name

1075

786

alt_interface = (attribute._dbus_interface

1076

.replace(orig_interface_name,

1077

alt_interface_name))

1078

interface_names.add(alt_interface)

787

.replace("se.recompile.Mandos",

788

"se.bsnet.fukt.Mandos"))

1079

789

# Is this a D-Bus signal?

1080

790

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

1081

# Extract the original non-method undecorated

1082

# function by black magic

791

# Extract the original non-method function by

792

# black magic

1083

793

nonmethod_func = (dict(

1084

794

zip(attribute.func_code.co_freevars,

1085

795

attribute.__closure__))["func"]

1096

806

nonmethod_func.func_name,

1097

807

nonmethod_func.func_defaults,

1098

808

nonmethod_func.func_closure)))

1099

# Copy annotations, if any

1100

try:

1101

new_function._dbus_annotations = (

1102

dict(attribute._dbus_annotations))

1103

except AttributeError:

1104

pass

1105

809

# Define a creator of a function to call both the

1106

# original and alternate functions, so both the

1107

# original and alternate signals gets sent when

1108

# the function is called

810

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

811

# signals gets sent when the function is called

1109

812

def fixscope(func1, func2):

1110

813

"""This function is a scope container to pass

1111

814

func1 and func2 to the "call_both" function

1118

821

return call_both

1119

822

# Create the "call_both" function and add it to

1120

823

# the class

1121

attr[attrname] = fixscope(attribute, new_function)

824

attr[attrname] = fixscope(attribute,

825

new_function)

1122

826

# Is this a D-Bus method?

1123

827

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

1124

828

# Create a new, but exactly alike, function

1135

839

attribute.func_name,

1136

840

attribute.func_defaults,

1137

841

attribute.func_closure)))

1138

# Copy annotations, if any

1139

try:

1140

attr[attrname]._dbus_annotations = (

1141

dict(attribute._dbus_annotations))

1142

except AttributeError:

1143

pass

1144

842

# Is this a D-Bus property?

1145

843

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

1146

844

# Create a new, but exactly alike, function

1160

858

attribute.func_name,

1161

859

attribute.func_defaults,

1162

860

attribute.func_closure)))

1163

# Copy annotations, if any

1164

try:

1165

attr[attrname]._dbus_annotations = (

1166

dict(attribute._dbus_annotations))

1167

except AttributeError:

1168

pass

1169

# Is this a D-Bus interface?

1170

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

1171

# Create a new, but exactly alike, function

1172

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

1173

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

1174

# to the class.

1175

attr[attrname] = (dbus_interface_annotations

1176

(alt_interface)

1177

(types.FunctionType

1178

(attribute.func_code,

1179

attribute.func_globals,

1180

attribute.func_name,

1181

attribute.func_defaults,

1182

attribute.func_closure)))

1183

if deprecate:

1184

# Deprecate all alternate interfaces

1185

iname="_AlternateDBusNames_interface_annotation{0}"

1186

for interface_name in interface_names:

1187

@dbus_interface_annotations(interface_name)

1188

def func(self):

1189

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

1190

"true" }

1191

# Find an unused name

1192

for aname in (iname.format(i)

1193

for i in itertools.count()):

1194

if aname not in attr:

1195

attr[aname] = func

1196

break

1197

if interface_names:

1198

# Replace the class with a new subclass of it with

1199

# methods, signals, etc. as created above.

1200

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

1201

(cls,), attr)

1202

return cls

1203

return wrapper

1204

1205

1206

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

1207

"se.bsnet.fukt.Mandos"})

861

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

862

1208

863

class ClientDBus(Client, DBusObjectWithProperties):

1209

864

"""A Client class using D-Bus

1210

865

1219

874

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

1220

875

1221

876

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

877

self._approvals_pending = 0

1222

878

self.bus = bus

1223

879

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

1224

880

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

1230

886

("/clients/" + client_object_name))

1231

887

DBusObjectWithProperties.__init__(self, self.bus,

1232

888

self.dbus_object_path)

1233

889

1234

890

def notifychangeproperty(transform_func,

1235

891

dbus_name, type_func=lambda x: x,

1236

892

variant_level=1):

1237

893

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

1238

894

its changes to DBus.

1239

895

1240

896

transform_fun: Function that takes a value and a variant_level

1241

897

and transforms it to a D-Bus type.

1242

898

dbus_name: D-Bus name of the variable

1259

915

1260

916

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

1261

917

918

1262

919

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1263

920

approvals_pending = notifychangeproperty(dbus.Boolean,

1264

921

"ApprovalPending",

1271

928

checker is not None)

1272

929

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1273

930

"LastCheckedOK")

1274

last_checker_status = notifychangeproperty(dbus.Int16,

1275

"LastCheckerStatus")

1276

931

last_approval_request = notifychangeproperty(

1277

932

datetime_to_dbus, "LastApprovalRequest")

1278

933

approved_by_default = notifychangeproperty(dbus.Boolean,

1279

934

"ApprovedByDefault")

1280

approval_delay = notifychangeproperty(dbus.UInt64,

935

approval_delay = notifychangeproperty(dbus.UInt16,

1281

936

"ApprovalDelay",

1282

937

type_func =

1283

timedelta_to_milliseconds)

938

_timedelta_to_milliseconds)

1284

939

approval_duration = notifychangeproperty(

1285

dbus.UInt64, "ApprovalDuration",

1286

type_func = timedelta_to_milliseconds)

940

dbus.UInt16, "ApprovalDuration",

941

type_func = _timedelta_to_milliseconds)

1287

942

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

1288

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

943

timeout = notifychangeproperty(dbus.UInt16, "Timeout",

1289

944

type_func =

1290

timedelta_to_milliseconds)

945

_timedelta_to_milliseconds)

1291

946

extended_timeout = notifychangeproperty(

1292

dbus.UInt64, "ExtendedTimeout",

1293

type_func = timedelta_to_milliseconds)

1294

interval = notifychangeproperty(dbus.UInt64,

947

dbus.UInt16, "ExtendedTimeout",

948

type_func = _timedelta_to_milliseconds)

949

interval = notifychangeproperty(dbus.UInt16,

1295

950

"Interval",

1296

951

type_func =

1297

timedelta_to_milliseconds)

952

_timedelta_to_milliseconds)

1298

953

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

1299

954

1300

955

del notifychangeproperty

1342

997

return r

1343

998

1344

999

def _reset_approved(self):

1345

self.approved = None

1000

self._approved = None

1346

1001

return False

1347

1002

1348

1003

def approve(self, value=True):

1349

self.approved = value

1350

gobject.timeout_add(timedelta_to_milliseconds

1004

self.send_changedstate()

1005

self._approved = value

1006

gobject.timeout_add(_timedelta_to_milliseconds

1351

1007

(self.approval_duration),

1352

1008

self._reset_approved)

1353

self.send_changedstate()

1009

1354

1010

1355

1011

## D-Bus methods, signals & properties

1356

1012

_interface = "se.recompile.Mandos.Client"

1357

1013

1358

## Interfaces

1359

1360

@dbus_interface_annotations(_interface)

1361

def _foo(self):

1362

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

1363

"false"}

1364

1365

1014

## Signals

1366

1015

1367

1016

# CheckerCompleted - signal

1466

1115

access="readwrite")

1467

1116

def ApprovalDuration_dbus_property(self, value=None):

1468

1117

if value is None: # get

1469

return dbus.UInt64(timedelta_to_milliseconds(

1118

return dbus.UInt64(_timedelta_to_milliseconds(

1470

1119

self.approval_duration))

1471

1120

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

1472

1121

1486

1135

def Host_dbus_property(self, value=None):

1487

1136

if value is None: # get

1488

1137

return dbus.String(self.host)

1489

self.host = unicode(value)

1138

self.host = value

1490

1139

1491

1140

# Created - property

1492

1141

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

1493

1142

def Created_dbus_property(self):

1494

return datetime_to_dbus(self.created)

1143

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

1495

1144

1496

1145

# LastEnabled - property

1497

1146

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

1518

1167

return

1519

1168

return datetime_to_dbus(self.last_checked_ok)

1520

1169

1521

# LastCheckerStatus - property

1522

@dbus_service_property(_interface, signature="n",

1523

access="read")

1524

def LastCheckerStatus_dbus_property(self):

1525

return dbus.Int16(self.last_checker_status)

1526

1527

1170

# Expires - property

1528

1171

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

1529

1172

def Expires_dbus_property(self):

1540

1183

def Timeout_dbus_property(self, value=None):

1541

1184

if value is None: # get

1542

1185

return dbus.UInt64(self.timeout_milliseconds())

1543

old_timeout = self.timeout

1544

1186

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

1545

# Reschedule disabling

1546

if self.enabled:

1547

now = datetime.datetime.utcnow()

1548

self.expires += self.timeout - old_timeout

1549

if self.expires <= now:

1550

# The timeout has passed

1551

self.disable()

1552

else:

1553

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

1554

is None):

1555

return

1556

gobject.source_remove(self.disable_initiator_tag)

1557

self.disable_initiator_tag = (

1558

gobject.timeout_add(

1559

timedelta_to_milliseconds(self.expires - now),

1560

self.disable))

1187

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

1188

return

1189

# Reschedule timeout

1190

gobject.source_remove(self.disable_initiator_tag)

1191

self.disable_initiator_tag = None

1192

self.expires = None

1193

time_to_die = _timedelta_to_milliseconds((self

1194

.last_checked_ok

1195

+ self.timeout)

1196

- datetime.datetime

1197

.utcnow())

1198

if time_to_die <= 0:

1199

# The timeout has passed

1200

self.disable()

1201

else:

1202

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

1203

+ datetime.timedelta(milliseconds =

1204

time_to_die))

1205

self.disable_initiator_tag = (gobject.timeout_add

1206

(time_to_die, self.disable))

1561

1207

1562

1208

# ExtendedTimeout - property

1563

1209

@dbus_service_property(_interface, signature="t",

1576

1222

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

1577

1223

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

1578

1224

return

1579

if self.enabled:

1580

# Reschedule checker run

1581

gobject.source_remove(self.checker_initiator_tag)

1582

self.checker_initiator_tag = (gobject.timeout_add

1583

(value, self.start_checker))

1584

self.start_checker() # Start one now, too

1225

# Reschedule checker run

1226

gobject.source_remove(self.checker_initiator_tag)

1227

self.checker_initiator_tag = (gobject.timeout_add

1228

(value, self.start_checker))

1229

self.start_checker() # Start one now, too

1585

1230

1586

1231

# Checker - property

1587

1232

@dbus_service_property(_interface, signature="s",

1589

1234

def Checker_dbus_property(self, value=None):

1590

1235

if value is None: # get

1591

1236

return dbus.String(self.checker_command)

1592

self.checker_command = unicode(value)

1237

self.checker_command = value

1593

1238

1594

1239

# CheckerRunning - property

1595

1240

@dbus_service_property(_interface, signature="b",

1624

1269

raise KeyError()

1625

1270

1626

1271

def __getattribute__(self, name):

1627

if name == '_pipe':

1272

if(name == '_pipe'):

1628

1273

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

1629

1274

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

1630

1275

data = self._pipe.recv()

1637

1282

return func

1638

1283

1639

1284

def __setattr__(self, name, value):

1640

if name == '_pipe':

1285

if(name == '_pipe'):

1641

1286

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

1642

1287

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

1643

1288

1289

class ClientDBusTransitional(ClientDBus):

1290

__metaclass__ = AlternateDBusNamesMetaclass

1644

1291

1645

1292

class ClientHandler(socketserver.BaseRequestHandler, object):

1646

1293

"""A class to handle client connections.

1729

1376

client.Rejected("Disabled")

1730

1377

return

1731

1378

1732

if client.approved or not client.approval_delay:

1379

if client._approved or not client.approval_delay:

1733

1380

#We are approved or approval is disabled

1734

1381

break

1735

elif client.approved is None:

1382

elif client._approved is None:

1736

1383

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

1737

1384

client.name)

1738

1385

if self.server.use_dbus:

1751

1398

#wait until timeout or approved

1752

1399

time = datetime.datetime.now()

1753

1400

client.changedstate.acquire()

1754

client.changedstate.wait(

1755

float(timedelta_to_milliseconds(delay)

1756

/ 1000))

1401

(client.changedstate.wait

1402

(float(client._timedelta_to_milliseconds(delay)

1403

/ 1000)))

1757

1404

client.changedstate.release()

1758

1405

time2 = datetime.datetime.now()

1759

1406

if (time2 - time) >= delay:

1775

1422

try:

1776

1423

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

1777

1424

except gnutls.errors.GNUTLSError as error:

1778

logger.warning("gnutls send failed",

1779

exc_info=error)

1425

logger.warning("gnutls send failed")

1780

1426

return

1781

1427

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

1782

1428

sent, len(client.secret)

1785

1431

1786

1432

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

1787

1433

# bump the timeout using extended_timeout

1788

client.bump_timeout(client.extended_timeout)

1434

client.checked_ok(client.extended_timeout)

1789

1435

if self.server.use_dbus:

1790

1436

# Emit D-Bus signal

1791

1437

client.GotSecret()

1796

1442

try:

1797

1443

session.bye()

1798

1444

except gnutls.errors.GNUTLSError as error:

1799

logger.warning("GnuTLS bye failed",

1800

exc_info=error)

1445

logger.warning("GnuTLS bye failed")

1801

1446

1802

1447

@staticmethod

1803

1448

def peer_certificate(session):

1859

1504

# Convert the buffer to a Python bytestring

1860

1505

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

1861

1506

# Convert the bytestring to hexadecimal notation

1862

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

1507

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

1863

1508

return hex_fpr

1864

1509

1865

1510

1868

1513

def sub_process_main(self, request, address):

1869

1514

try:

1870

1515

self.finish_request(request, address)

1871

except Exception:

1516

except:

1872

1517

self.handle_error(request, address)

1873

1518

self.close_request(request)

1874

1519

1875

1520

def process_request(self, request, address):

1876

1521

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

1877

1522

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

1878

args = (request, address))

1523

args = (request,

1524

address))

1879

1525

proc.start()

1880

1526

return proc

1881

1527

1909

1555

use_ipv6: Boolean; to use IPv6 or not

1910

1556

"""

1911

1557

def __init__(self, server_address, RequestHandlerClass,

1912

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

1913

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

1914

creating a new one with socket.socket().

1915

"""

1558

interface=None, use_ipv6=True):

1916

1559

self.interface = interface

1917

1560

if use_ipv6:

1918

1561

self.address_family = socket.AF_INET6

1919

if socketfd is not None:

1920

# Save the file descriptor

1921

self.socketfd = socketfd

1922

# Save the original socket.socket() function

1923

self.socket_socket = socket.socket

1924

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

1925

#

1926

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

1927

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

1928

# patching socket.socket.)

1929

#

1930

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

1931

@functools.wraps(socket.socket)

1932

def socket_wrapper(*args, **kwargs):

1933

# Restore original function so subsequent calls are

1934

# not affected.

1935

socket.socket = self.socket_socket

1936

del self.socket_socket

1937

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

1938

# saved file descriptor.

1939

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

1940

# Replace socket.socket() function with wrapper

1941

socket.socket = socket_wrapper

1942

# The socketserver.TCPServer.__init__ will call

1943

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

1944

# socket_wrapper(), if socketfd was set.

1945

1562

socketserver.TCPServer.__init__(self, server_address,

1946

1563

RequestHandlerClass)

1947

1948

1564

def server_bind(self):

1949

1565

"""This overrides the normal server_bind() function

1950

1566

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

1958

1574

try:

1959

1575

self.socket.setsockopt(socket.SOL_SOCKET,

1960

1576

SO_BINDTODEVICE,

1961

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

1577

str(self.interface

1578

+ '\0'))

1962

1579

except socket.error as error:

1963

if error.errno == errno.EPERM:

1964

logger.error("No permission to bind to"

1965

" interface %s", self.interface)

1966

elif error.errno == errno.ENOPROTOOPT:

1580

if error[0] == errno.EPERM:

1581

logger.error("No permission to"

1582

" bind to interface %s",

1583

self.interface)

1584

elif error[0] == errno.ENOPROTOOPT:

1967

1585

logger.error("SO_BINDTODEVICE not available;"

1968

1586

" cannot bind to interface %s",

1969

1587

self.interface)

1970

elif error.errno == errno.ENODEV:

1971

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

1972

" cannot bind", self.interface)

1973

1588

else:

1974

1589

raise

1975

1590

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

2005

1620

"""

2006

1621

def __init__(self, server_address, RequestHandlerClass,

2007

1622

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

2008

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

1623

gnutls_priority=None, use_dbus=True):

2009

1624

self.enabled = False

2010

1625

self.clients = clients

2011

1626

if self.clients is None:

2012

self.clients = {}

1627

self.clients = set()

2013

1628

self.use_dbus = use_dbus

2014

1629

self.gnutls_priority = gnutls_priority

2015

1630

IPv6_TCPServer.__init__(self, server_address,

2016

1631

RequestHandlerClass,

2017

1632

interface = interface,

2018

use_ipv6 = use_ipv6,

2019

socketfd = socketfd)

1633

use_ipv6 = use_ipv6)

2020

1634

def server_activate(self):

2021

1635

if self.enabled:

2022

1636

return socketserver.TCPServer.server_activate(self)

2035

1649

2036

1650

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

2037

1651

proc = None, client_object=None):

1652

condition_names = {

1653

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

1654

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

1655

# blocking).

1656

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

1657

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

1658

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

1659

# broken, usually for pipes and

1660

# sockets).

1661

}

1662

conditions_string = ' | '.join(name

1663

for cond, name in

1664

condition_names.iteritems()

1665

if cond & condition)

2038

1666

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

2039

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

1667

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

2040

1668

# Wait for other process to exit

2041

1669

proc.join()

2042

1670

return False

2049

1677

fpr = request[1]

2050

1678

address = request[2]

2051

1679

2052

for c in self.clients.itervalues():

1680

for c in self.clients:

2053

1681

if c.fingerprint == fpr:

2054

1682

client = c

2055

1683

break

2100

1728

return True

2101

1729

2102

1730

2103

def rfc3339_duration_to_delta(duration):

2104

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

2105

2106

>>> rfc3339_duration_to_delta("P7D")

2107

datetime.timedelta(7)

2108

>>> rfc3339_duration_to_delta("PT60S")

2109

datetime.timedelta(0, 60)

2110

>>> rfc3339_duration_to_delta("PT60M")

2111

datetime.timedelta(0, 3600)

2112

>>> rfc3339_duration_to_delta("PT24H")

2113

datetime.timedelta(1)

2114

>>> rfc3339_duration_to_delta("P1W")

2115

datetime.timedelta(7)

2116

>>> rfc3339_duration_to_delta("PT5M30S")

2117

datetime.timedelta(0, 330)

2118

>>> rfc3339_duration_to_delta("P1DT3M20S")

2119

datetime.timedelta(1, 200)

2120

"""

2121

2122

# Parsing an RFC 3339 duration with regular expressions is not

2123

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

2124

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

2125

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

2126

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

2127

# avoid excessive use of external libraries.

2128

2129

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

2130

Token = collections.namedtuple("Token",

2131

("regexp", # To match token; if

2132

# "value" is not None,

2133

# must have a "group"

2134

# containing digits

2135

"value", # datetime.timedelta or

2136

# None

2137

"followers")) # Tokens valid after

2138

# this token

2139

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

2140

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

2141

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

2142

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

2143

datetime.timedelta(seconds=1),

2144

frozenset((token_end,)))

2145

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

2146

datetime.timedelta(minutes=1),

2147

frozenset((token_second, token_end)))

2148

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

2149

datetime.timedelta(hours=1),

2150

frozenset((token_minute, token_end)))

2151

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

2152

None,

2153

frozenset((token_hour, token_minute,

2154

token_second)))

2155

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

2156

datetime.timedelta(days=1),

2157

frozenset((token_time, token_end)))

2158

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

2159

datetime.timedelta(weeks=4),

2160

frozenset((token_day, token_end)))

2161

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

2162

datetime.timedelta(weeks=52),

2163

frozenset((token_month, token_end)))

2164

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

2165

datetime.timedelta(weeks=1),

2166

frozenset((token_end,)))

2167

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

2168

frozenset((token_year, token_month,

2169

token_day, token_time,

2170

token_week))),

2171

# Define starting values

2172

value = datetime.timedelta() # Value so far

2173

found_token = None

2174

followers = frozenset(token_duration,) # Following valid tokens

2175

s = duration # String left to parse

2176

# Loop until end token is found

2177

while found_token is not token_end:

2178

# Search for any currently valid tokens

2179

for token in followers:

2180

match = token.regexp.match(s)

2181

if match is not None:

2182

# Token found

2183

if token.value is not None:

2184

# Value found, parse digits

2185

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

2186

# Add to value so far

2187

value += factor * token.value

2188

# Strip token from string

2189

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

2190

# Go to found token

2191

found_token = token

2192

# Set valid next tokens

2193

followers = found_token.followers

2194

break

2195

else:

2196

# No currently valid tokens were found

2197

raise ValueError("Invalid RFC 3339 duration")

2198

# End token found

2199

return value

2200

2201

2202

1731

def string_to_delta(interval):

2203

1732

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

2204

1733

2215

1744

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

2216

1745

datetime.timedelta(0, 330)

2217

1746

"""

2218

2219

try:

2220

return rfc3339_duration_to_delta(interval)

2221

except ValueError:

2222

pass

2223

2224

1747

timevalue = datetime.timedelta(0)

2225

1748

for s in interval.split():

2226

1749

try:

2237

1760

elif suffix == "w":

2238

1761

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

2239

1762

else:

2240

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

2241

.format(suffix))

1763

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

2242

1764

except (ValueError, IndexError) as e:

2243

1765

raise ValueError(*(e.args))

2244

1766

timevalue += delta

2245

1767

return timevalue

2246

1768

2247

1769

1770

def if_nametoindex(interface):

1771

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

1772

1773

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

1774

global if_nametoindex

1775

try:

1776

if_nametoindex = (ctypes.cdll.LoadLibrary

1777

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

1778

.if_nametoindex)

1779

except (OSError, AttributeError):

1780

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

1781

def if_nametoindex(interface):

1782

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

1783

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

1784

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

1785

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1786

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

1787

interface))

1788

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

1789

ifreq[16:20])[0]

1790

return interface_index

1791

return if_nametoindex(interface)

1792

1793

2248

1794

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

2249

1795

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

2250

1796

2258

1804

sys.exit()

2259

1805

if not noclose:

2260

1806

# Close all standard open file descriptors

2261

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

1807

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

2262

1808

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

2263

1809

raise OSError(errno.ENODEV,

2264

"{0} not a character device"

2265

.format(os.devnull))

1810

"%s not a character device"

1811

% os.path.devnull)

2266

1812

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

2267

1813

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

2268

1814

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

2277

1823

2278

1824

parser = argparse.ArgumentParser()

2279

1825

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

2280

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

1826

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

2281

1827

help="show version number and exit")

2282

1828

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

2283

1829

help="Bind to interface IF")

2305

1851

" system bus interface")

2306

1852

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

2307

1853

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

2308

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

2309

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

2310

" state")

2311

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

2312

help="Specify a file descriptor to a network"

2313

" socket to use instead of creating one")

2314

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

2315

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

2316

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

2317

help="Run in foreground")

2318

2319

1854

options = parser.parse_args()

2320

1855

2321

1856

if options.check:

2334

1869

"use_dbus": "True",

2335

1870

"use_ipv6": "True",

2336

1871

"debuglevel": "",

2337

"restore": "True",

2338

"socket": "",

2339

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

2340

"foreground": "False",

2341

1872

}

2342

1873

2343

1874

# Parse config file for server-global settings

2348

1879

# Convert the SafeConfigParser object to a dict

2349

1880

server_settings = server_config.defaults()

2350

1881

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

2351

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

1882

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

2352

1883

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

2353

1884

option)

2354

1885

if server_settings["port"]:

2355

1886

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

2356

1887

"port")

2357

if server_settings["socket"]:

2358

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

2359

"socket")

2360

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

2361

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

2362

# happen with a supplied network socket.

2363

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

2364

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

2365

["socket"])

2366

1888

del server_config

2367

1889

2368

1890

# Override the settings from the config file with command line

2369

1891

# options, if set.

2370

1892

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

2371

1893

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

2372

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

2373

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

1894

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

2374

1895

value = getattr(options, option)

2375

1896

if value is not None:

2376

1897

server_settings[option] = value

2379

1900

for option in server_settings.keys():

2380

1901

if type(server_settings[option]) is str:

2381

1902

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

2382

# Debug implies foreground

2383

if server_settings["debug"]:

2384

server_settings["foreground"] = True

2385

1903

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

2386

1904

2387

1905

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

2391

1909

debuglevel = server_settings["debuglevel"]

2392

1910

use_dbus = server_settings["use_dbus"]

2393

1911

use_ipv6 = server_settings["use_ipv6"]

2394

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

2395

stored_state_file)

2396

foreground = server_settings["foreground"]

2397

2398

if debug:

2399

initlogger(debug, logging.DEBUG)

2400

else:

2401

if not debuglevel:

2402

initlogger(debug)

2403

else:

2404

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

2405

initlogger(debug, level)

2406

1912

2407

1913

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

2408

1914

syslogger.setFormatter(logging.Formatter

2409

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

2410

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

2411

.format(server_settings

2412

["servicename"])))

1915

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

1916

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

1917

% server_settings["servicename"]))

2413

1918

2414

1919

# Parse config file with clients

2415

client_config = configparser.SafeConfigParser(Client

2416

.client_defaults)

1920

client_defaults = { "timeout": "5m",

1921

"extended_timeout": "15m",

1922

"interval": "2m",

1923

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

1924

"host": "",

1925

"approval_delay": "0s",

1926

"approval_duration": "1s",

1927

}

1928

client_config = configparser.SafeConfigParser(client_defaults)

2417

1929

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

2418

1930

"clients.conf"))

2419

1931

2428

1940

use_ipv6=use_ipv6,

2429

1941

gnutls_priority=

2430

1942

server_settings["priority"],

2431

use_dbus=use_dbus,

2432

socketfd=(server_settings["socket"]

2433

or None))

2434

if not foreground:

1943

use_dbus=use_dbus)

1944

if not debug:

2435

1945

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

2436

pidfile = None

2437

1946

try:

2438

1947

pidfile = open(pidfilename, "w")

2439

except IOError as e:

2440

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

2441

exc_info=e)

1948

except IOError:

1949

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

2442

1950

2443

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

1951

try:

1952

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

1953

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

1954

except KeyError:

2444

1955

try:

2445

uid = pwd.getpwnam(name).pw_uid

2446

gid = pwd.getpwnam(name).pw_gid

2447

break

1956

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

1957

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

2448

1958

except KeyError:

2449

continue

2450

else:

2451

uid = 65534

2452

gid = 65534

1959

try:

1960

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

1961

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

1962

except KeyError:

1963

uid = 65534

1964

gid = 65534

2453

1965

try:

2454

1966

os.setgid(gid)

2455

1967

os.setuid(uid)

2456

1968

except OSError as error:

2457

if error.errno != errno.EPERM:

1969

if error[0] != errno.EPERM:

2458

1970

raise error

2459

1971

1972

if not debug and not debuglevel:

1973

syslogger.setLevel(logging.WARNING)

1974

console.setLevel(logging.WARNING)

1975

if debuglevel:

1976

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

1977

syslogger.setLevel(level)

1978

console.setLevel(level)

1979

2460

1980

if debug:

2461

1981

# Enable all possible GnuTLS debugging

2462

1982

2472

1992

.gnutls_global_set_log_function(debug_gnutls))

2473

1993

2474

1994

# Redirect stdin so all checkers get /dev/null

2475

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

1995

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

2476

1996

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

2477

1997

if null > 2:

2478

1998

os.close(null)

1999

else:

2000

# No console logging

2001

logger.removeHandler(console)

2479

2002

2480

2003

# Need to fork before connecting to D-Bus

2481

if not foreground:

2004

if not debug:

2482

2005

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

2483

2006

daemon()

2484

2007

2485

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

2486

# need to inform gobject that threads will be used.

2487

gobject.threads_init()

2488

2489

2008

global main_loop

2490

2009

# From the Avahi example code

2491

DBusGMainLoop(set_as_default=True)

2010

DBusGMainLoop(set_as_default=True )

2492

2011

main_loop = gobject.MainLoop()

2493

2012

bus = dbus.SystemBus()

2494

2013

# End of Avahi example code

2500

2019

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

2501

2020

do_not_queue=True))

2502

2021

except dbus.exceptions.NameExistsException as e:

2503

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

2022

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

2504

2023

use_dbus = False

2505

2024

server_settings["use_dbus"] = False

2506

2025

tcp_server.use_dbus = False

2507

2026

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2508

service = AvahiServiceToSyslog(name =

2509

server_settings["servicename"],

2510

servicetype = "_mandos._tcp",

2511

protocol = protocol, bus = bus)

2027

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

2028

servicetype = "_mandos._tcp",

2029

protocol = protocol, bus = bus)

2512

2030

if server_settings["interface"]:

2513

2031

service.interface = (if_nametoindex

2514

2032

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

2518

2036

2519

2037

client_class = Client

2520

2038

if use_dbus:

2521

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

2522

2523

client_settings = Client.config_parser(client_config)

2524

old_client_settings = {}

2525

clients_data = {}

2526

2527

# Get client data and settings from last running state.

2528

if server_settings["restore"]:

2529

try:

2530

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

2531

clients_data, old_client_settings = (pickle.load

2532

(stored_state))

2533

os.remove(stored_state_path)

2534

except IOError as e:

2535

if e.errno == errno.ENOENT:

2536

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

2537

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

2538

else:

2539

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

2540

exc_info=e)

2541

raise

2542

except EOFError as e:

2543

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

2544

"EOFError:", exc_info=e)

2545

2546

with PGPEngine() as pgp:

2547

for client_name, client in clients_data.iteritems():

2548

# Decide which value to use after restoring saved state.

2549

# We have three different values: Old config file,

2550

# new config file, and saved state.

2551

# New config value takes precedence if it differs from old

2552

# config value, otherwise use saved state.

2553

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

2554

try:

2555

# For each value in new config, check if it

2556

# differs from the old config value (Except for

2557

# the "secret" attribute)

2558

if (name != "secret" and

2559

value != old_client_settings[client_name]

2560

[name]):

2561

client[name] = value

2562

except KeyError:

2563

pass

2564

2565

# Clients who has passed its expire date can still be

2566

# enabled if its last checker was successful. Clients

2567

# whose checker succeeded before we stored its state is

2568

# assumed to have successfully run all checkers during

2569

# downtime.

2570

if client["enabled"]:

2571

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

2572

if not client["last_checked_ok"]:

2573

logger.warning(

2574

"disabling client {0} - Client never "

2575

"performed a successful checker"

2576

.format(client_name))

2577

client["enabled"] = False

2578

elif client["last_checker_status"] != 0:

2579

logger.warning(

2580

"disabling client {0} - Client "

2581

"last checker failed with error code {1}"

2582

.format(client_name,

2583

client["last_checker_status"]))

2584

client["enabled"] = False

2585

else:

2586

client["expires"] = (datetime.datetime

2587

.utcnow()

2588

+ client["timeout"])

2589

logger.debug("Last checker succeeded,"

2590

" keeping {0} enabled"

2591

.format(client_name))

2039

client_class = functools.partial(ClientDBusTransitional,

2040

bus = bus)

2041

def client_config_items(config, section):

2042

special_settings = {

2043

"approved_by_default":

2044

lambda: config.getboolean(section,

2045

"approved_by_default"),

2046

}

2047

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

2592

2048

try:

2593

client["secret"] = (

2594

pgp.decrypt(client["encrypted_secret"],

2595

client_settings[client_name]

2596

["secret"]))

2597

except PGPError:

2598

# If decryption fails, we use secret from new settings

2599

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

2600

.format(client_name))

2601

client["secret"] = (

2602

client_settings[client_name]["secret"])

2603

2604

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

2605

for client_name in (set(old_client_settings)

2606

- set(client_settings)):

2607

del clients_data[client_name]

2608

for client_name in (set(client_settings)

2609

- set(old_client_settings)):

2610

clients_data[client_name] = client_settings[client_name]

2611

2612

# Create all client objects

2613

for client_name, client in clients_data.iteritems():

2614

tcp_server.clients[client_name] = client_class(

2615

name = client_name, settings = client)

2616

2049

yield (name, special_settings[name]())

2050

except KeyError:

2051

yield (name, value)

2052

2053

tcp_server.clients.update(set(

2054

client_class(name = section,

2055

config= dict(client_config_items(

2056

client_config, section)))

2057

for section in client_config.sections()))

2617

2058

if not tcp_server.clients:

2618

2059

logger.warning("No clients defined")

2619

2620

if not foreground:

2621

if pidfile is not None:

2622

try:

2623

with pidfile:

2624

pid = os.getpid()

2625

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

2626

except IOError:

2627

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

2628

pidfilename, pid)

2629

del pidfile

2060

2061

if not debug:

2062

try:

2063

with pidfile:

2064

pid = os.getpid()

2065

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

2066

del pidfile

2067

except IOError:

2068

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

2069

pidfilename, pid)

2070

except NameError:

2071

# "pidfile" was never created

2072

pass

2630

2073

del pidfilename

2074

2075

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

2631

2076

2632

2077

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

2633

2078

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

2634

2079

2635

2080

if use_dbus:

2636

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

2637

"se.bsnet.fukt.Mandos"})

2638

class MandosDBusService(DBusObjectWithProperties):

2081

class MandosDBusService(dbus.service.Object):

2639

2082

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

2640

2083

def __init__(self):

2641

2084

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

2642

2085

_interface = "se.recompile.Mandos"

2643

2086

2644

@dbus_interface_annotations(_interface)

2645

def _foo(self):

2646

return { "org.freedesktop.DBus.Property"

2647

".EmitsChangedSignal":

2648

"false"}

2649

2650

2087

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

2651

2088

def ClientAdded(self, objpath):

2652

2089

"D-Bus signal"

2666

2103

def GetAllClients(self):

2667

2104

"D-Bus method"

2668

2105

return dbus.Array(c.dbus_object_path

2669

for c in

2670

tcp_server.clients.itervalues())

2106

for c in tcp_server.clients)

2671

2107

2672

2108

@dbus.service.method(_interface,

2673

2109

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

2675

2111

"D-Bus method"

2676

2112

return dbus.Dictionary(

2677

2113

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

2678

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

2114

for c in tcp_server.clients),

2679

2115

signature="oa{sv}")

2680

2116

2681

2117

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

2682

2118

def RemoveClient(self, object_path):

2683

2119

"D-Bus method"

2684

for c in tcp_server.clients.itervalues():

2120

for c in tcp_server.clients:

2685

2121

if c.dbus_object_path == object_path:

2686

del tcp_server.clients[c.name]

2122

tcp_server.clients.remove(c)

2687

2123

c.remove_from_connection()

2688

2124

# Don't signal anything except ClientRemoved

2689

2125

c.disable(quiet=True)

2694

2130

2695

2131

del _interface

2696

2132

2697

mandos_dbus_service = MandosDBusService()

2133

class MandosDBusServiceTransitional(MandosDBusService):

2134

__metaclass__ = AlternateDBusNamesMetaclass

2135

mandos_dbus_service = MandosDBusServiceTransitional()

2698

2136

2699

2137

def cleanup():

2700

2138

"Cleanup function; run on exit"

2701

2139

service.cleanup()

2702

2140

2703

2141

multiprocessing.active_children()

2704

if not (tcp_server.clients or client_settings):

2705

return

2706

2707

# Store client before exiting. Secrets are encrypted with key

2708

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

2709

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

2710

clients = {}

2711

with PGPEngine() as pgp:

2712

for client in tcp_server.clients.itervalues():

2713

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

2714

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

2715

key)

2716

client_dict = {}

2717

2718

# A list of attributes that can not be pickled

2719

# + secret.

2720

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

2721

"checker"))

2722

for name, typ in (inspect.getmembers

2723

(dbus.service.Object)):

2724

exclude.add(name)

2725

2726

client_dict["encrypted_secret"] = (client

2727

.encrypted_secret)

2728

for attr in client.client_structure:

2729

if attr not in exclude:

2730

client_dict[attr] = getattr(client, attr)

2731

2732

clients[client.name] = client_dict

2733

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

2734

2735

try:

2736

with (tempfile.NamedTemporaryFile

2737

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

2738

dir=os.path.dirname(stored_state_path),

2739

delete=False)) as stored_state:

2740

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

2741

tempname=stored_state.name

2742

os.rename(tempname, stored_state_path)

2743

except (IOError, OSError) as e:

2744

if not debug:

2745

try:

2746

os.remove(tempname)

2747

except NameError:

2748

pass

2749

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

2750

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

2751

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

2752

else:

2753

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

2754

exc_info=e)

2755

raise e

2756

2757

# Delete all clients, and settings from config

2758

2142

while tcp_server.clients:

2759

name, client = tcp_server.clients.popitem()

2143

client = tcp_server.clients.pop()

2760

2144

if use_dbus:

2761

2145

client.remove_from_connection()

2146

client.disable_hook = None

2762

2147

# Don't signal anything except ClientRemoved

2763

2148

client.disable(quiet=True)

2764

2149

if use_dbus:

2766

2151

mandos_dbus_service.ClientRemoved(client

2767

2152

.dbus_object_path,

2768

2153

client.name)

2769

client_settings.clear()

2770

2154

2771

2155

atexit.register(cleanup)

2772

2156

2773

for client in tcp_server.clients.itervalues():

2157

for client in tcp_server.clients:

2774

2158

if use_dbus:

2775

2159

# Emit D-Bus signal

2776

2160

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2777

# Need to initiate checking of clients

2778

if client.enabled:

2779

client.init_checker()

2161

client.enable()

2780

2162

2781

2163

tcp_server.enable()

2782

2164

tcp_server.server_activate()

2785

2167

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

2786

2168

if use_ipv6:

2787

2169

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

2788

" flowinfo %d, scope_id %d",

2789

*tcp_server.socket.getsockname())

2170

" flowinfo %d, scope_id %d"

2171

% tcp_server.socket.getsockname())

2790

2172

else: # IPv4

2791

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

2792

*tcp_server.socket.getsockname())

2173

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

2174

% tcp_server.socket.getsockname())

2793

2175

2794

2176

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

2795

2177

2798

2180

try:

2799

2181

service.activate()

2800

2182

except dbus.exceptions.DBusException as error:

2801

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

2183

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

2802

2184

cleanup()

2803

2185

sys.exit(1)

2804

2186

# End of Avahi example code

2811

2193

logger.debug("Starting main loop")

2812

2194

main_loop.run()

2813

2195

except AvahiError as error:

2814

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

2196

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

2815

2197

cleanup()

2816

2198

sys.exit(1)

2817

2199

except KeyboardInterrupt:

2822

2204

# Must run before the D-Bus bus name gets deregistered

2823

2205

cleanup()

2824

2206

2207

2825

2208

if __name__ == '__main__':

2826

2209

main()