/mandos/trunk : revision 24.1.174

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

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#

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# Everything else is

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#

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

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

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# along with this program. If not, see

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

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#

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

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

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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import SocketServer as socketserver

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import socket

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import argparse

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import functools

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import dbus

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import dbus.service

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import ctypes.util

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import xml.dom.minidom

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import inspect

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import GnuPGInterface

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.5.5"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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version = "1.3.0"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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

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"""init logger and add loglevel"""

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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

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pass

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class PGPEngine(object):

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

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def __init__(self):

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self.gnupg = GnuPGInterface.GnuPG()

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

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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self.gnupg.options.extra_args.extend(['--force-mdc',

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'--quiet',

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'--no-use-agent'])

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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def encrypt(self, data, password):

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self.gnupg.passphrase = self.password_encode(password)

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with open(os.devnull, "w") as devnull:

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try:

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proc = self.gnupg.run(['--symmetric'],

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create_fhs=['stdin', 'stdout'],

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attach_fhs={'stderr': devnull})

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with contextlib.closing(proc.handles['stdin']) as f:

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f.write(data)

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with contextlib.closing(proc.handles['stdout']) as f:

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return ciphertext

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def decrypt(self, data, password):

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self.gnupg.passphrase = self.password_encode(password)

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with open(os.devnull, "w") as devnull:

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try:

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proc = self.gnupg.run(['--decrypt'],

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create_fhs=['stdin', 'stdout'],

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attach_fhs={'stderr': devnull})

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with contextlib.closing(proc.handles['stdin']) as f:

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f.write(data)

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with contextlib.closing(proc.handles['stdout']) as f:

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decrypted_plaintext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return decrypted_plaintext

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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class AvahiError(Exception):

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

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

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

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

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

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

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self.name)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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def remove(self):

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

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if self.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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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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class Client(object):

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

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Attributes:

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

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

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

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

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

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

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checker_initiator_tag: a gobject event source tag, or None

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

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client_structure: Object describing what attributes a client has

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and is used for storing the client at exit

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current_checker_command: string; current running checker_command

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

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disable_initiator_tag: a gobject event source tag, or None

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enabled: bool()

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

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

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

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

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last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, -2 means no checker completed yet.

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

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last_enabled: datetime.datetime(); (UTC)

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

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D-Bus identifiers

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

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

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until this client is disabled

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extended_timeout: extra long timeout when secret has been sent

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runtime_expansions: Allowed attributes for runtime expansion.

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

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disabled, or None

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"""

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runtime_expansions = ("approval_delay", "approval_duration",

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"created", "enabled", "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": "5m",

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"extended_timeout": "15m",

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"interval": "2m",

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

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"host": "",

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"approval_delay": "0s",

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"approval_duration": "1s",

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"approved_by_default": "True",

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"enabled": "True",

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}

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@staticmethod

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def _timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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def timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.timeout)

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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.extended_timeout)

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return self._timedelta_to_milliseconds(self.timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return timedelta_to_milliseconds(self.interval)

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return self._timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

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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.

482

"""

483

settings = {}

484

for client_name in config.sections():

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section = dict(config.items(client_name))

486

client = settings[client_name] = {}

487

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

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# Reformat values from string types to Python types

490

client["approved_by_default"] = config.getboolean(

491

client_name, "approved_by_default")

492

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

493

"enabled")

494

495

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

496

.replace(" ", ""))

497

if "secret" in section:

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

499

elif "secfile" in section:

500

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

501

(section["secfile"])),

502

"rb") as secfile:

503

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

504

else:

505

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"]

516

client["last_approval_request"] = None

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client["last_checked_ok"] = None

518

client["last_checker_status"] = -2

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return settings

521

522

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

324

return self._timedelta_to_milliseconds(self.approval_delay)

325

326

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

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

328

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

329

attribute."""

523

330

self.name = name

524

# adding all client settings

525

for setting, value in settings.iteritems():

526

setattr(self, setting, value)

527

528

if self.enabled:

529

if not hasattr(self, "last_enabled"):

530

self.last_enabled = datetime.datetime.utcnow()

531

if not hasattr(self, "expires"):

532

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

533

+ self.timeout)

534

else:

535

self.last_enabled = None

536

self.expires = None

537

331

if config is None:

332

config = {}

538

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

539

334

# Uppercase and remove spaces from fingerprint for later

540

335

# comparison purposes with return value from the fingerprint()

541

336

# function

337

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

338

.replace(" ", ""))

542

339

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

543

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

544

datetime.datetime.utcnow())

545

546

# attributes specific for this server instance

340

if "secret" in config:

341

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

342

elif "secfile" in config:

343

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

344

(config["secfile"])),

345

"rb") as secfile:

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self.secret = secfile.read()

347

else:

348

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

349

% self.name)

350

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

351

self.created = datetime.datetime.utcnow()

352

self.enabled = False

353

self.last_approval_request = None

354

self.last_enabled = None

355

self.last_checked_ok = None

356

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

357

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

358

self.disable_hook = disable_hook

547

359

self.checker = None

548

360

self.checker_initiator_tag = None

549

361

self.disable_initiator_tag = None

550

362

self.checker_callback_tag = None

363

self.checker_command = config["checker"]

551

364

self.current_checker_command = None

552

self.approved = None

365

self.last_connect = None

366

self._approved = None

367

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

368

True)

553

369

self.approvals_pending = 0

554

self.changedstate = (multiprocessing_manager

555

.Condition(multiprocessing_manager

556

.Lock()))

557

self.client_structure = [attr for attr in

558

self.__dict__.iterkeys()

559

if not attr.startswith("_")]

560

self.client_structure.append("client_structure")

561

562

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

563

lambda obj:

564

isinstance(obj,

565

property)):

566

if not name.startswith("_"):

567

self.client_structure.append(name)

370

self.approval_delay = string_to_delta(

371

config["approval_delay"])

372

self.approval_duration = string_to_delta(

373

config["approval_duration"])

374

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

568

375

569

# Send notice to process children that client state has changed

570

376

def send_changedstate(self):

571

with self.changedstate:

572

self.changedstate.notify_all()

573

377

self.changedstate.acquire()

378

self.changedstate.notify_all()

379

self.changedstate.release()

380

574

381

def enable(self):

575

382

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

576

383

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

577

384

# Already enabled

578

385

return

579

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

580

self.enabled = True

386

self.send_changedstate()

581

387

self.last_enabled = datetime.datetime.utcnow()

582

self.init_checker()

583

self.send_changedstate()

584

585

def disable(self, quiet=True):

586

"""Disable this client."""

587

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

588

return False

589

if not quiet:

590

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

591

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

592

gobject.source_remove(self.disable_initiator_tag)

593

self.disable_initiator_tag = None

594

self.expires = None

595

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

596

gobject.source_remove(self.checker_initiator_tag)

597

self.checker_initiator_tag = None

598

self.stop_checker()

599

self.enabled = False

600

if not quiet:

601

self.send_changedstate()

602

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

603

return False

604

605

def __del__(self):

606

self.disable()

607

608

def init_checker(self):

609

388

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

610

389

# and every interval from then on.

611

if self.checker_initiator_tag is not None:

612

gobject.source_remove(self.checker_initiator_tag)

613

390

self.checker_initiator_tag = (gobject.timeout_add

614

391

(self.interval_milliseconds(),

615

392

self.start_checker))

616

393

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

617

if self.disable_initiator_tag is not None:

618

gobject.source_remove(self.disable_initiator_tag)

619

394

self.disable_initiator_tag = (gobject.timeout_add

620

395

(self.timeout_milliseconds(),

621

396

self.disable))

397

self.enabled = True

622

398

# Also start a new checker *right now*.

623

399

self.start_checker()

624

400

401

def disable(self, quiet=True):

402

"""Disable this client."""

403

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

404

return False

405

if not quiet:

406

self.send_changedstate()

407

if not quiet:

408

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

409

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

410

gobject.source_remove(self.disable_initiator_tag)

411

self.disable_initiator_tag = None

412

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

413

gobject.source_remove(self.checker_initiator_tag)

414

self.checker_initiator_tag = None

415

self.stop_checker()

416

if self.disable_hook:

417

self.disable_hook(self)

418

self.enabled = False

419

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

420

return False

421

422

def __del__(self):

423

self.disable_hook = None

424

self.disable()

425

625

426

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

626

427

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

627

428

self.checker_callback_tag = None

628

429

self.checker = None

629

430

if os.WIFEXITED(condition):

630

self.last_checker_status = os.WEXITSTATUS(condition)

631

if self.last_checker_status == 0:

431

exitstatus = os.WEXITSTATUS(condition)

432

if exitstatus == 0:

632

433

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

633

434

vars(self))

634

435

self.checked_ok()

636

437

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

637

438

vars(self))

638

439

else:

639

self.last_checker_status = -1

640

440

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

641

441

vars(self))

642

442

643

443

def checked_ok(self):

644

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

444

"""Bump up the timeout for this client.

445

446

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

447

alive and well.

448

"""

645

449

self.last_checked_ok = datetime.datetime.utcnow()

646

self.last_checker_status = 0

647

self.bump_timeout()

648

649

def bump_timeout(self, timeout=None):

650

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

651

if timeout is None:

652

timeout = self.timeout

653

if self.disable_initiator_tag is not None:

654

gobject.source_remove(self.disable_initiator_tag)

655

self.disable_initiator_tag = None

656

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

657

self.disable_initiator_tag = (gobject.timeout_add

658

(timedelta_to_milliseconds

659

(timeout), self.disable))

660

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

450

gobject.source_remove(self.disable_initiator_tag)

451

self.disable_initiator_tag = (gobject.timeout_add

452

(self.timeout_milliseconds(),

453

self.disable))

661

454

662

455

def need_approval(self):

663

456

self.last_approval_request = datetime.datetime.utcnow()

668

461

If a checker already exists, leave it running and do

669

462

nothing."""

670

463

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

671

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

672

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

673

# would inevitably timeout, since no checker would get a

674

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

464

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

465

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

466

# client would inevitably timeout, since no checker would get

467

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

675

468

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

676

469

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

677

470

# should be.

691

484

self.current_checker_command)

692

485

# Start a new checker if needed

693

486

if self.checker is None:

694

# Escape attributes for the shell

695

escaped_attrs = dict(

696

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

697

for attr in

698

self.runtime_expansions)

699

487

try:

700

command = self.checker_command % escaped_attrs

701

except TypeError as error:

702

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

703

self.checker_command, exc_info=error)

704

return True # Try again later

488

# In case checker_command has exactly one % operator

489

command = self.checker_command % self.host

490

except TypeError:

491

# Escape attributes for the shell

492

escaped_attrs = dict(

493

(attr,

494

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

495

errors=

496

'replace')))

497

for attr in

498

self.runtime_expansions)

499

500

try:

501

command = self.checker_command % escaped_attrs

502

except TypeError as error:

503

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

504

' %s', self.checker_command, error)

505

return True # Try again later

705

506

self.current_checker_command = command

706

507

try:

707

508

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

713

514

self.checker = subprocess.Popen(command,

714

515

close_fds=True,

715

516

shell=True, cwd="/")

517

self.checker_callback_tag = (gobject.child_watch_add

518

(self.checker.pid,

519

self.checker_callback,

520

data=command))

521

# The checker may have completed before the gobject

522

# watch was added. Check for this.

523

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

524

if pid:

525

gobject.source_remove(self.checker_callback_tag)

526

self.checker_callback(pid, status, command)

716

527

except OSError as error:

717

logger.error("Failed to start subprocess",

718

exc_info=error)

719

self.checker_callback_tag = (gobject.child_watch_add

720

(self.checker.pid,

721

self.checker_callback,

722

data=command))

723

# The checker may have completed before the gobject

724

# watch was added. Check for this.

725

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

726

if pid:

727

gobject.source_remove(self.checker_callback_tag)

728

self.checker_callback(pid, status, command)

528

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

529

error)

729

530

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

730

531

return True

731

532

738

539

return

739

540

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

740

541

try:

741

self.checker.terminate()

542

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

742

543

#time.sleep(0.5)

743

544

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

744

# self.checker.kill()

545

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

745

546

except OSError as error:

746

547

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

747

548

raise

748

549

self.checker = None

749

550

750

751

551

def dbus_service_property(dbus_interface, signature="v",

752

552

access="readwrite", byte_arrays=False):

753

553

"""Decorators for marking methods of a DBusObjectWithProperties to

764

564

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

765

565

if byte_arrays and signature != "ay":

766

566

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

767

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

567

" signature %r" % signature)

768

568

def decorator(func):

769

569

func._dbus_is_property = True

770

570

func._dbus_interface = dbus_interface

778

578

return decorator

779

579

780

580

781

def dbus_interface_annotations(dbus_interface):

782

"""Decorator for marking functions returning interface annotations

783

784

Usage:

785

786

@dbus_interface_annotations("org.example.Interface")

787

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

788

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

789

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

790

"false"}

791

"""

792

def decorator(func):

793

func._dbus_is_interface = True

794

func._dbus_interface = dbus_interface

795

func._dbus_name = dbus_interface

796

return func

797

return decorator

798

799

800

def dbus_annotations(annotations):

801

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

802

Usage:

803

804

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

805

access="r")

806

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

807

"org.freedesktop.DBus.Property."

808

"EmitsChangedSignal": "false"})

809

def Property_dbus_property(self):

810

return dbus.Boolean(False)

811

"""

812

def decorator(func):

813

func._dbus_annotations = annotations

814

return func

815

return decorator

816

817

818

581

class DBusPropertyException(dbus.exceptions.DBusException):

819

582

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

820

583

"""

836

599

837

600

class DBusObjectWithProperties(dbus.service.Object):

838

601

"""A D-Bus object with properties.

839

602

840

603

Classes inheriting from this can use the dbus_service_property

841

604

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

842

605

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

843

606

"""

844

607

845

608

@staticmethod

846

def _is_dbus_thing(thing):

847

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

848

849

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

850

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

851

"""

852

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

853

False)

609

def _is_dbus_property(obj):

610

return getattr(obj, "_dbus_is_property", False)

854

611

855

def _get_all_dbus_things(self, thing):

612

def _get_all_dbus_properties(self):

856

613

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

857

614

"""

858

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

859

name),

860

athing.__get__(self))

861

for cls in self.__class__.__mro__

862

for name, athing in

863

inspect.getmembers(cls,

864

self._is_dbus_thing(thing)))

615

return ((prop._dbus_name, prop)

616

for name, prop in

617

inspect.getmembers(self, self._is_dbus_property))

865

618

866

619

def _get_dbus_property(self, interface_name, property_name):

867

620

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

868

621

property with the specified name and interface.

869

622

"""

870

for cls in self.__class__.__mro__:

871

for name, value in (inspect.getmembers

872

(cls,

873

self._is_dbus_thing("property"))):

874

if (value._dbus_name == property_name

875

and value._dbus_interface == interface_name):

876

return value.__get__(self)

877

623

for name in (property_name,

624

property_name + "_dbus_property"):

625

prop = getattr(self, name, None)

626

if (prop is None

627

or not self._is_dbus_property(prop)

628

or prop._dbus_name != property_name

629

or (interface_name and prop._dbus_interface

630

and interface_name != prop._dbus_interface)):

631

continue

632

return prop

878

633

# No such property

879

634

raise DBusPropertyNotFound(self.dbus_object_path + ":"

880

635

+ interface_name + "."

905

660

# signatures other than "ay".

906

661

if prop._dbus_signature != "ay":

907

662

raise ValueError

908

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

909

for byte in value))

663

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

664

for byte in value))

910

665

prop(value)

911

666

912

667

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

914

669

def GetAll(self, interface_name):

915

670

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

916

671

standard.

917

672

918

673

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

919

674

"""

920

properties = {}

921

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

675

all = {}

676

for name, prop in self._get_all_dbus_properties():

922

677

if (interface_name

923

678

and interface_name != prop._dbus_interface):

924

679

# Interface non-empty but did not match

928

683

continue

929

684

value = prop()

930

685

if not hasattr(value, "variant_level"):

931

properties[name] = value

686

all[name] = value

932

687

continue

933

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

934

value.variant_level+1)

935

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

688

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

689

value.variant_level+1)

690

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

936

691

937

692

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

938

693

out_signature="s",

939

694

path_keyword='object_path',

940

695

connection_keyword='connection')

941

696

def Introspect(self, object_path, connection):

942

"""Overloading of standard D-Bus method.

943

944

Inserts property tags and interface annotation tags.

697

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

945

698

"""

946

699

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

947

700

connection)

954

707

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

955

708

return e

956

709

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

957

# Add property tags

958

710

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

959

711

for name, prop

960

in self._get_all_dbus_things("property")

712

in self._get_all_dbus_properties()

961

713

if prop._dbus_interface

962

714

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

963

715

if_tag.appendChild(tag)

964

# Add annotation tags

965

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

966

for tag in if_tag.getElementsByTagName(typ):

967

annots = dict()

968

for name, prop in (self.

969

_get_all_dbus_things(typ)):

970

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

971

and prop._dbus_interface

972

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

973

annots.update(getattr

974

(prop,

975

"_dbus_annotations",

976

{}))

977

for name, value in annots.iteritems():

978

ann_tag = document.createElement(

979

"annotation")

980

ann_tag.setAttribute("name", name)

981

ann_tag.setAttribute("value", value)

982

tag.appendChild(ann_tag)

983

# Add interface annotation tags

984

for annotation, value in dict(

985

itertools.chain.from_iterable(

986

annotations().iteritems()

987

for name, annotations in

988

self._get_all_dbus_things("interface")

989

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

990

)).iteritems():

991

ann_tag = document.createElement("annotation")

992

ann_tag.setAttribute("name", annotation)

993

ann_tag.setAttribute("value", value)

994

if_tag.appendChild(ann_tag)

995

716

# Add the names to the return values for the

996

717

# "org.freedesktop.DBus.Properties" methods

997

718

if (if_tag.getAttribute("name")

1012

733

except (AttributeError, xml.dom.DOMException,

1013

734

xml.parsers.expat.ExpatError) as error:

1014

735

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

1015

exc_info=error)

736

error)

1016

737

return xmlstring

1017

738

1018

739

1019

def datetime_to_dbus(dt, variant_level=0):

1020

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

1021

if dt is None:

1022

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

1023

return dbus.String(dt.isoformat(),

1024

variant_level=variant_level)

1025

1026

1027

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1028

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

1029

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

1030

interface names according to the "alt_interface_names" mapping.

1031

Usage:

1032

1033

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

1034

"net.example.AlternateInterface"})

1035

class SampleDBusObject(dbus.service.Object):

1036

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

1037

def SampleDBusMethod():

1038

pass

1039

1040

The above "SampleDBusMethod" on "SampleDBusObject" will be

1041

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

1042

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

1043

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

1044

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

1045

1046

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

1047

(from DBusObjectWithProperties) and interfaces (from the

1048

dbus_interface_annotations decorator).

1049

"""

1050

def wrapper(cls):

1051

for orig_interface_name, alt_interface_name in (

1052

alt_interface_names.iteritems()):

1053

attr = {}

1054

interface_names = set()

1055

# Go though all attributes of the class

1056

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

1057

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

1058

# with the wrong interface name

1059

if (not hasattr(attribute, "_dbus_interface")

1060

or not attribute._dbus_interface

1061

.startswith(orig_interface_name)):

1062

continue

1063

# Create an alternate D-Bus interface name based on

1064

# the current name

1065

alt_interface = (attribute._dbus_interface

1066

.replace(orig_interface_name,

1067

alt_interface_name))

1068

interface_names.add(alt_interface)

1069

# Is this a D-Bus signal?

1070

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

1071

# Extract the original non-method function by

1072

# black magic

1073

nonmethod_func = (dict(

1074

zip(attribute.func_code.co_freevars,

1075

attribute.__closure__))["func"]

1076

.cell_contents)

1077

# Create a new, but exactly alike, function

1078

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

1079

# with the alternate D-Bus interface name

1080

new_function = (dbus.service.signal

1081

(alt_interface,

1082

attribute._dbus_signature)

1083

(types.FunctionType(

1084

nonmethod_func.func_code,

1085

nonmethod_func.func_globals,

1086

nonmethod_func.func_name,

1087

nonmethod_func.func_defaults,

1088

nonmethod_func.func_closure)))

1089

# Copy annotations, if any

1090

try:

1091

new_function._dbus_annotations = (

1092

dict(attribute._dbus_annotations))

1093

except AttributeError:

1094

pass

1095

# Define a creator of a function to call both the

1096

# original and alternate functions, so both the

1097

# original and alternate signals gets sent when

1098

# the function is called

1099

def fixscope(func1, func2):

1100

"""This function is a scope container to pass

1101

func1 and func2 to the "call_both" function

1102

outside of its arguments"""

1103

def call_both(*args, **kwargs):

1104

"""This function will emit two D-Bus

1105

signals by calling func1 and func2"""

1106

func1(*args, **kwargs)

1107

func2(*args, **kwargs)

1108

return call_both

1109

# Create the "call_both" function and add it to

1110

# the class

1111

attr[attrname] = fixscope(attribute, new_function)

1112

# Is this a D-Bus method?

1113

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

1114

# Create a new, but exactly alike, function

1115

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

1116

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

1117

# to the class.

1118

attr[attrname] = (dbus.service.method

1119

(alt_interface,

1120

attribute._dbus_in_signature,

1121

attribute._dbus_out_signature)

1122

(types.FunctionType

1123

(attribute.func_code,

1124

attribute.func_globals,

1125

attribute.func_name,

1126

attribute.func_defaults,

1127

attribute.func_closure)))

1128

# Copy annotations, if any

1129

try:

1130

attr[attrname]._dbus_annotations = (

1131

dict(attribute._dbus_annotations))

1132

except AttributeError:

1133

pass

1134

# Is this a D-Bus property?

1135

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

1136

# Create a new, but exactly alike, function

1137

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

1138

# property with the alternate D-Bus interface

1139

# name. Add it to the class.

1140

attr[attrname] = (dbus_service_property

1141

(alt_interface,

1142

attribute._dbus_signature,

1143

attribute._dbus_access,

1144

attribute

1145

._dbus_get_args_options

1146

["byte_arrays"])

1147

(types.FunctionType

1148

(attribute.func_code,

1149

attribute.func_globals,

1150

attribute.func_name,

1151

attribute.func_defaults,

1152

attribute.func_closure)))

1153

# Copy annotations, if any

1154

try:

1155

attr[attrname]._dbus_annotations = (

1156

dict(attribute._dbus_annotations))

1157

except AttributeError:

1158

pass

1159

# Is this a D-Bus interface?

1160

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

1161

# Create a new, but exactly alike, function

1162

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

1163

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

1164

# to the class.

1165

attr[attrname] = (dbus_interface_annotations

1166

(alt_interface)

1167

(types.FunctionType

1168

(attribute.func_code,

1169

attribute.func_globals,

1170

attribute.func_name,

1171

attribute.func_defaults,

1172

attribute.func_closure)))

1173

if deprecate:

1174

# Deprecate all alternate interfaces

1175

iname="_AlternateDBusNames_interface_annotation{0}"

1176

for interface_name in interface_names:

1177

@dbus_interface_annotations(interface_name)

1178

def func(self):

1179

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

1180

"true" }

1181

# Find an unused name

1182

for aname in (iname.format(i)

1183

for i in itertools.count()):

1184

if aname not in attr:

1185

attr[aname] = func

1186

break

1187

if interface_names:

1188

# Replace the class with a new subclass of it with

1189

# methods, signals, etc. as created above.

1190

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

1191

(cls,), attr)

1192

return cls

1193

return wrapper

1194

1195

1196

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

1197

"se.bsnet.fukt.Mandos"})

1198

740

class ClientDBus(Client, DBusObjectWithProperties):

1199

741

"""A Client class using D-Bus

1200

742

1209

751

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

1210

752

1211

753

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

754

self._approvals_pending = 0

1212

755

self.bus = bus

1213

756

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

1214

757

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

1220

763

("/clients/" + client_object_name))

1221

764

DBusObjectWithProperties.__init__(self, self.bus,

1222

765

self.dbus_object_path)

1223

1224

def notifychangeproperty(transform_func,

1225

dbus_name, type_func=lambda x: x,

1226

variant_level=1):

1227

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

1228

its changes to DBus.

1229

1230

transform_fun: Function that takes a value and a variant_level

1231

and transforms it to a D-Bus type.

1232

dbus_name: D-Bus name of the variable

1233

type_func: Function that transform the value before sending it

1234

to the D-Bus. Default: no transform

1235

variant_level: D-Bus variant level. Default: 1

1236

"""

1237

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

1238

def setter(self, value):

1239

if hasattr(self, "dbus_object_path"):

1240

if (not hasattr(self, attrname) or

1241

type_func(getattr(self, attrname, None))

1242

!= type_func(value)):

1243

dbus_value = transform_func(type_func(value),

1244

variant_level

1245

=variant_level)

1246

self.PropertyChanged(dbus.String(dbus_name),

1247

dbus_value)

1248

setattr(self, attrname, value)

1249

1250

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

1251

1252

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1253

approvals_pending = notifychangeproperty(dbus.Boolean,

1254

"ApprovalPending",

1255

type_func = bool)

1256

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

1257

last_enabled = notifychangeproperty(datetime_to_dbus,

1258

"LastEnabled")

1259

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

1260

type_func = lambda checker:

1261

checker is not None)

1262

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1263

"LastCheckedOK")

1264

last_checker_status = notifychangeproperty(dbus.Int16,

1265

"LastCheckerStatus")

1266

last_approval_request = notifychangeproperty(

1267

datetime_to_dbus, "LastApprovalRequest")

1268

approved_by_default = notifychangeproperty(dbus.Boolean,

1269

"ApprovedByDefault")

1270

approval_delay = notifychangeproperty(dbus.UInt64,

1271

"ApprovalDelay",

1272

type_func =

1273

timedelta_to_milliseconds)

1274

approval_duration = notifychangeproperty(

1275

dbus.UInt64, "ApprovalDuration",

1276

type_func = timedelta_to_milliseconds)

1277

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

1278

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

1279

type_func =

1280

timedelta_to_milliseconds)

1281

extended_timeout = notifychangeproperty(

1282

dbus.UInt64, "ExtendedTimeout",

1283

type_func = timedelta_to_milliseconds)

1284

interval = notifychangeproperty(dbus.UInt64,

1285

"Interval",

1286

type_func =

1287

timedelta_to_milliseconds)

1288

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

1289

1290

del notifychangeproperty

766

767

def _get_approvals_pending(self):

768

return self._approvals_pending

769

def _set_approvals_pending(self, value):

770

old_value = self._approvals_pending

771

self._approvals_pending = value

772

bval = bool(value)

773

if (hasattr(self, "dbus_object_path")

774

and bval is not bool(old_value)):

775

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

776

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

777

dbus_bool)

778

779

approvals_pending = property(_get_approvals_pending,

780

_set_approvals_pending)

781

del _get_approvals_pending, _set_approvals_pending

782

783

@staticmethod

784

def _datetime_to_dbus(dt, variant_level=0):

785

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

786

return dbus.String(dt.isoformat(),

787

variant_level=variant_level)

788

789

def enable(self):

790

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

791

r = Client.enable(self)

792

if oldstate != self.enabled:

793

# Emit D-Bus signals

794

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

795

dbus.Boolean(True, variant_level=1))

796

self.PropertyChanged(

797

dbus.String("LastEnabled"),

798

self._datetime_to_dbus(self.last_enabled,

799

variant_level=1))

800

return r

801

802

def disable(self, quiet = False):

803

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

804

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

805

if not quiet and oldstate != self.enabled:

806

# Emit D-Bus signal

807

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

808

dbus.Boolean(False, variant_level=1))

809

return r

1291

810

1292

811

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

1293

812

try:

1302

821

*args, **kwargs):

1303

822

self.checker_callback_tag = None

1304

823

self.checker = None

824

# Emit D-Bus signal

825

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

826

dbus.Boolean(False, variant_level=1))

1305

827

if os.WIFEXITED(condition):

1306

828

exitstatus = os.WEXITSTATUS(condition)

1307

829

# Emit D-Bus signal

1317

839

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

1318

840

*args, **kwargs)

1319

841

842

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

843

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

844

# Emit D-Bus signal

845

self.PropertyChanged(

846

dbus.String("LastCheckedOK"),

847

(self._datetime_to_dbus(self.last_checked_ok,

848

variant_level=1)))

849

850

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

851

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

852

# Emit D-Bus signal

853

self.PropertyChanged(

854

dbus.String("LastApprovalRequest"),

855

(self._datetime_to_dbus(self.last_approval_request,

856

variant_level=1)))

857

return r

858

1320

859

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

1321

860

old_checker = self.checker

1322

861

if self.checker is not None:

1329

868

and old_checker_pid != self.checker.pid):

1330

869

# Emit D-Bus signal

1331

870

self.CheckerStarted(self.current_checker_command)

871

self.PropertyChanged(

872

dbus.String("CheckerRunning"),

873

dbus.Boolean(True, variant_level=1))

1332

874

return r

1333

875

876

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

877

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

878

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

879

if (old_checker is not None

880

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

881

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

882

dbus.Boolean(False, variant_level=1))

883

return r

884

1334

885

def _reset_approved(self):

1335

self.approved = None

886

self._approved = None

1336

887

return False

1337

888

1338

889

def approve(self, value=True):

1339

self.approved = value

1340

gobject.timeout_add(timedelta_to_milliseconds

890

self.send_changedstate()

891

self._approved = value

892

gobject.timeout_add(self._timedelta_to_milliseconds

1341

893

(self.approval_duration),

1342

894

self._reset_approved)

1343

self.send_changedstate()

895

1344

896

1345

897

## D-Bus methods, signals & properties

1346

_interface = "se.recompile.Mandos.Client"

1347

1348

## Interfaces

1349

1350

@dbus_interface_annotations(_interface)

1351

def _foo(self):

1352

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

1353

"false"}

898

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

1354

899

1355

900

## Signals

1356

901

1442

987

if value is None: # get

1443

988

return dbus.Boolean(self.approved_by_default)

1444

989

self.approved_by_default = bool(value)

990

# Emit D-Bus signal

991

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

992

dbus.Boolean(value, variant_level=1))

1445

993

1446

994

# ApprovalDelay - property

1447

995

@dbus_service_property(_interface, signature="t",

1450

998

if value is None: # get

1451

999

return dbus.UInt64(self.approval_delay_milliseconds())

1452

1000

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

1001

# Emit D-Bus signal

1002

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

1003

dbus.UInt64(value, variant_level=1))

1453

1004

1454

1005

# ApprovalDuration - property

1455

1006

@dbus_service_property(_interface, signature="t",

1456

1007

access="readwrite")

1457

1008

def ApprovalDuration_dbus_property(self, value=None):

1458

1009

if value is None: # get

1459

return dbus.UInt64(timedelta_to_milliseconds(

1010

return dbus.UInt64(self._timedelta_to_milliseconds(

1460

1011

self.approval_duration))

1461

1012

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

1013

# Emit D-Bus signal

1014

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

1015

dbus.UInt64(value, variant_level=1))

1462

1016

1463

1017

# Name - property

1464

1018

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

1476

1030

def Host_dbus_property(self, value=None):

1477

1031

if value is None: # get

1478

1032

return dbus.String(self.host)

1479

self.host = unicode(value)

1033

self.host = value

1034

# Emit D-Bus signal

1035

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

1036

dbus.String(value, variant_level=1))

1480

1037

1481

1038

# Created - property

1482

1039

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

1483

1040

def Created_dbus_property(self):

1484

return datetime_to_dbus(self.created)

1041

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

1485

1042

1486

1043

# LastEnabled - property

1487

1044

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

1488

1045

def LastEnabled_dbus_property(self):

1489

return datetime_to_dbus(self.last_enabled)

1046

if self.last_enabled is None:

1047

return dbus.String("")

1048

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

1490

1049

1491

1050

# Enabled - property

1492

1051

@dbus_service_property(_interface, signature="b",

1506

1065

if value is not None:

1507

1066

self.checked_ok()

1508

1067

return

1509

return datetime_to_dbus(self.last_checked_ok)

1510

1511

# LastCheckerStatus - property

1512

@dbus_service_property(_interface, signature="n",

1513

access="read")

1514

def LastCheckerStatus_dbus_property(self):

1515

return dbus.Int16(self.last_checker_status)

1516

1517

# Expires - property

1518

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

1519

def Expires_dbus_property(self):

1520

return datetime_to_dbus(self.expires)

1068

if self.last_checked_ok is None:

1069

return dbus.String("")

1070

return dbus.String(self._datetime_to_dbus(self

1071

.last_checked_ok))

1521

1072

1522

1073

# LastApprovalRequest - property

1523

1074

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

1524

1075

def LastApprovalRequest_dbus_property(self):

1525

return datetime_to_dbus(self.last_approval_request)

1076

if self.last_approval_request is None:

1077

return dbus.String("")

1078

return dbus.String(self.

1079

_datetime_to_dbus(self

1080

.last_approval_request))

1526

1081

1527

1082

# Timeout - property

1528

1083

@dbus_service_property(_interface, signature="t",

1530

1085

def Timeout_dbus_property(self, value=None):

1531

1086

if value is None: # get

1532

1087

return dbus.UInt64(self.timeout_milliseconds())

1533

old_timeout = self.timeout

1534

1088

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

1535

# Reschedule disabling

1536

if self.enabled:

1537

now = datetime.datetime.utcnow()

1538

self.expires += self.timeout - old_timeout

1539

if self.expires <= now:

1540

# The timeout has passed

1541

self.disable()

1542

else:

1543

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

1544

is None):

1545

return

1546

gobject.source_remove(self.disable_initiator_tag)

1547

self.disable_initiator_tag = (

1548

gobject.timeout_add(

1549

timedelta_to_milliseconds(self.expires - now),

1550

self.disable))

1551

1552

# ExtendedTimeout - property

1553

@dbus_service_property(_interface, signature="t",

1554

access="readwrite")

1555

def ExtendedTimeout_dbus_property(self, value=None):

1556

if value is None: # get

1557

return dbus.UInt64(self.extended_timeout_milliseconds())

1558

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

1089

# Emit D-Bus signal

1090

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

1091

dbus.UInt64(value, variant_level=1))

1092

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

1093

return

1094

# Reschedule timeout

1095

gobject.source_remove(self.disable_initiator_tag)

1096

self.disable_initiator_tag = None

1097

time_to_die = (self.

1098

_timedelta_to_milliseconds((self

1099

.last_checked_ok

1100

+ self.timeout)

1101

- datetime.datetime

1102

.utcnow()))

1103

if time_to_die <= 0:

1104

# The timeout has passed

1105

self.disable()

1106

else:

1107

self.disable_initiator_tag = (gobject.timeout_add

1108

(time_to_die, self.disable))

1559

1109

1560

1110

# Interval - property

1561

1111

@dbus_service_property(_interface, signature="t",

1564

1114

if value is None: # get

1565

1115

return dbus.UInt64(self.interval_milliseconds())

1566

1116

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

1117

# Emit D-Bus signal

1118

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

1119

dbus.UInt64(value, variant_level=1))

1567

1120

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

1568

1121

return

1569

if self.enabled:

1570

# Reschedule checker run

1571

gobject.source_remove(self.checker_initiator_tag)

1572

self.checker_initiator_tag = (gobject.timeout_add

1573

(value, self.start_checker))

1574

self.start_checker() # Start one now, too

1575

1122

# Reschedule checker run

1123

gobject.source_remove(self.checker_initiator_tag)

1124

self.checker_initiator_tag = (gobject.timeout_add

1125

(value, self.start_checker))

1126

self.start_checker() # Start one now, too

1127

1576

1128

# Checker - property

1577

1129

@dbus_service_property(_interface, signature="s",

1578

1130

access="readwrite")

1579

1131

def Checker_dbus_property(self, value=None):

1580

1132

if value is None: # get

1581

1133

return dbus.String(self.checker_command)

1582

self.checker_command = unicode(value)

1134

self.checker_command = value

1135

# Emit D-Bus signal

1136

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

1137

dbus.String(self.checker_command,

1138

variant_level=1))

1583

1139

1584

1140

# CheckerRunning - property

1585

1141

@dbus_service_property(_interface, signature="b",

1612

1168

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

1613

1169

if not self._pipe.recv():

1614

1170

raise KeyError()

1615

1171

1616

1172

def __getattribute__(self, name):

1617

if name == '_pipe':

1173

if(name == '_pipe'):

1618

1174

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

1619

1175

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

1620

1176

data = self._pipe.recv()

1625

1181

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

1626

1182

return self._pipe.recv()[1]

1627

1183

return func

1628

1184

1629

1185

def __setattr__(self, name, value):

1630

if name == '_pipe':

1186

if(name == '_pipe'):

1631

1187

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

1632

1188

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

1633

1189

1644

1200

unicode(self.client_address))

1645

1201

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

1646

1202

self.server.child_pipe.fileno())

1647

1203

1648

1204

session = (gnutls.connection

1649

1205

.ClientSession(self.request,

1650

1206

gnutls.connection

1651

1207

.X509Credentials()))

1652

1208

1653

1209

# Note: gnutls.connection.X509Credentials is really a

1654

1210

# generic GnuTLS certificate credentials object so long as

1655

1211

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

1656

1212

# here despite using OpenPGP certificates.

1657

1213

1658

1214

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

1659

1215

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

1660

1216

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

1666

1222

(gnutls.library.functions

1667

1223

.gnutls_priority_set_direct(session._c_object,

1668

1224

priority, None))

1669

1225

1670

1226

# Start communication using the Mandos protocol

1671

1227

# Get protocol number

1672

1228

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

1677

1233

except (ValueError, IndexError, RuntimeError) as error:

1678

1234

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

1679

1235

return

1680

1236

1681

1237

# Start GnuTLS connection

1682

1238

try:

1683

1239

session.handshake()

1687

1243

# established. Just abandon the request.

1688

1244

return

1689

1245

logger.debug("Handshake succeeded")

1690

1246

1691

1247

approval_required = False

1692

1248

try:

1693

1249

try:

1698

1254

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

1699

1255

return

1700

1256

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

1701

1257

1702

1258

try:

1703

1259

client = ProxyClient(child_pipe, fpr,

1704

1260

self.client_address)

1716

1272

client.name)

1717

1273

if self.server.use_dbus:

1718

1274

# Emit D-Bus signal

1719

client.Rejected("Disabled")

1275

client.Rejected("Disabled")

1720

1276

return

1721

1277

1722

if client.approved or not client.approval_delay:

1278

if client._approved or not client.approval_delay:

1723

1279

#We are approved or approval is disabled

1724

1280

break

1725

elif client.approved is None:

1281

elif client._approved is None:

1726

1282

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

1727

1283

client.name)

1728

1284

if self.server.use_dbus:

1739

1295

return

1740

1296

1741

1297

#wait until timeout or approved

1298

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

1742

1299

time = datetime.datetime.now()

1743

1300

client.changedstate.acquire()

1744

client.changedstate.wait(

1745

float(timedelta_to_milliseconds(delay)

1746

/ 1000))

1301

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

1747

1302

client.changedstate.release()

1748

1303

time2 = datetime.datetime.now()

1749

1304

if (time2 - time) >= delay:

1765

1320

try:

1766

1321

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

1767

1322

except gnutls.errors.GNUTLSError as error:

1768

logger.warning("gnutls send failed",

1769

exc_info=error)

1323

logger.warning("gnutls send failed")

1770

1324

return

1771

1325

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

1772

1326

sent, len(client.secret)

1773

1327

- (sent_size + sent))

1774

1328

sent_size += sent

1775

1329

1776

1330

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

1777

# bump the timeout using extended_timeout

1778

client.bump_timeout(client.extended_timeout)

1331

# bump the timeout as if seen

1332

client.checked_ok()

1779

1333

if self.server.use_dbus:

1780

1334

# Emit D-Bus signal

1781

1335

client.GotSecret()

1786

1340

try:

1787

1341

session.bye()

1788

1342

except gnutls.errors.GNUTLSError as error:

1789

logger.warning("GnuTLS bye failed",

1790

exc_info=error)

1343

logger.warning("GnuTLS bye failed")

1791

1344

1792

1345

@staticmethod

1793

1346

def peer_certificate(session):

1849

1402

# Convert the buffer to a Python bytestring

1850

1403

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

1851

1404

# Convert the bytestring to hexadecimal notation

1852

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

1405

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

1853

1406

return hex_fpr

1854

1407

1855

1408

1858

1411

def sub_process_main(self, request, address):

1859

1412

try:

1860

1413

self.finish_request(request, address)

1861

except Exception:

1414

except:

1862

1415

self.handle_error(request, address)

1863

1416

self.close_request(request)

1864

1417

1865

1418

def process_request(self, request, address):

1866

1419

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

1867

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

1868

args = (request, address))

1869

proc.start()

1870

return proc

1871

1420

multiprocessing.Process(target = self.sub_process_main,

1421

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

1872

1422

1873

1423

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1874

1424

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

1878

1428

This function creates a new pipe in self.pipe

1879

1429

"""

1880

1430

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1881

1882

proc = MultiprocessingMixIn.process_request(self, request,

1883

client_address)

1431

1432

super(MultiprocessingMixInWithPipe,

1433

self).process_request(request, client_address)

1884

1434

self.child_pipe.close()

1885

self.add_pipe(parent_pipe, proc)

1886

1887

def add_pipe(self, parent_pipe, proc):

1435

self.add_pipe(parent_pipe)

1436

1437

def add_pipe(self, parent_pipe):

1888

1438

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

1889

1439

raise NotImplementedError

1890

1440

1891

1892

1441

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1893

1442

socketserver.TCPServer, object):

1894

1443

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

1899

1448

use_ipv6: Boolean; to use IPv6 or not

1900

1449

"""

1901

1450

def __init__(self, server_address, RequestHandlerClass,

1902

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

1903

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

1904

creating a new one with socket.socket().

1905

"""

1451

interface=None, use_ipv6=True):

1906

1452

self.interface = interface

1907

1453

if use_ipv6:

1908

1454

self.address_family = socket.AF_INET6

1909

if socketfd is not None:

1910

# Save the file descriptor

1911

self.socketfd = socketfd

1912

# Save the original socket.socket() function

1913

self.socket_socket = socket.socket

1914

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

1915

#

1916

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

1917

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

1918

# patching socket.socket.)

1919

#

1920

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

1921

@functools.wraps(socket.socket)

1922

def socket_wrapper(*args, **kwargs):

1923

# Restore original function so subsequent calls are

1924

# not affected.

1925

socket.socket = self.socket_socket

1926

del self.socket_socket

1927

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

1928

# saved file descriptor.

1929

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

1930

# Replace socket.socket() function with wrapper

1931

socket.socket = socket_wrapper

1932

# The socketserver.TCPServer.__init__ will call

1933

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

1934

# socket_wrapper(), if socketfd was set.

1935

1455

socketserver.TCPServer.__init__(self, server_address,

1936

1456

RequestHandlerClass)

1937

1938

1457

def server_bind(self):

1939

1458

"""This overrides the normal server_bind() function

1940

1459

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

1951

1470

str(self.interface

1952

1471

+ '\0'))

1953

1472

except socket.error as error:

1954

if error.errno == errno.EPERM:

1473

if error[0] == errno.EPERM:

1955

1474

logger.error("No permission to"

1956

1475

" bind to interface %s",

1957

1476

self.interface)

1958

elif error.errno == errno.ENOPROTOOPT:

1477

elif error[0] == errno.ENOPROTOOPT:

1959

1478

logger.error("SO_BINDTODEVICE not available;"

1960

1479

" cannot bind to interface %s",

1961

1480

self.interface)

1962

elif error.errno == errno.ENODEV:

1963

logger.error("Interface %s does not"

1964

" exist, cannot bind",

1965

self.interface)

1966

1481

else:

1967

1482

raise

1968

1483

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

1998

1513

"""

1999

1514

def __init__(self, server_address, RequestHandlerClass,

2000

1515

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

2001

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

1516

gnutls_priority=None, use_dbus=True):

2002

1517

self.enabled = False

2003

1518

self.clients = clients

2004

1519

if self.clients is None:

2005

self.clients = {}

1520

self.clients = set()

2006

1521

self.use_dbus = use_dbus

2007

1522

self.gnutls_priority = gnutls_priority

2008

1523

IPv6_TCPServer.__init__(self, server_address,

2009

1524

RequestHandlerClass,

2010

1525

interface = interface,

2011

use_ipv6 = use_ipv6,

2012

socketfd = socketfd)

1526

use_ipv6 = use_ipv6)

2013

1527

def server_activate(self):

2014

1528

if self.enabled:

2015

1529

return socketserver.TCPServer.server_activate(self)

2016

2017

1530

def enable(self):

2018

1531

self.enabled = True

2019

2020

def add_pipe(self, parent_pipe, proc):

1532

def add_pipe(self, parent_pipe):

2021

1533

# Call "handle_ipc" for both data and EOF events

2022

1534

gobject.io_add_watch(parent_pipe.fileno(),

2023

1535

gobject.IO_IN | gobject.IO_HUP,

2024

1536

functools.partial(self.handle_ipc,

2025

parent_pipe =

2026

parent_pipe,

2027

proc = proc))

2028

1537

parent_pipe = parent_pipe))

1538

2029

1539

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

2030

proc = None, client_object=None):

2031

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

2032

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

2033

# Wait for other process to exit

2034

proc.join()

1540

client_object=None):

1541

condition_names = {

1542

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

1543

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

1544

# blocking).

1545

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

1546

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

1547

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

1548

# broken, usually for pipes and

1549

# sockets).

1550

}

1551

conditions_string = ' | '.join(name

1552

for cond, name in

1553

condition_names.iteritems()

1554

if cond & condition)

1555

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

1556

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

2035

1557

return False

2036

1558

2037

1559

# Read a request from the child

2042

1564

fpr = request[1]

2043

1565

address = request[2]

2044

1566

2045

for c in self.clients.itervalues():

1567

for c in self.clients:

2046

1568

if c.fingerprint == fpr:

2047

1569

client = c

2048

1570

break

2051

1573

"dress: %s", fpr, address)

2052

1574

if self.use_dbus:

2053

1575

# Emit D-Bus signal

2054

mandos_dbus_service.ClientNotFound(fpr,

2055

address[0])

1576

mandos_dbus_service.ClientNotFound(fpr, address[0])

2056

1577

parent_pipe.send(False)

2057

1578

return False

2058

1579

2059

1580

gobject.io_add_watch(parent_pipe.fileno(),

2060

1581

gobject.IO_IN | gobject.IO_HUP,

2061

1582

functools.partial(self.handle_ipc,

2062

parent_pipe =

2063

parent_pipe,

2064

proc = proc,

2065

client_object =

2066

client))

1583

parent_pipe = parent_pipe,

1584

client_object = client))

2067

1585

parent_pipe.send(True)

2068

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

2069

# same fileno

1586

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

2070

1587

return False

2071

1588

if command == 'funcall':

2072

1589

funcname = request[1]

2073

1590

args = request[2]

2074

1591

kwargs = request[3]

2075

1592

2076

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

2077

funcname)(*args,

2078

**kwargs)))

2079

1593

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

1594

2080

1595

if command == 'getattr':

2081

1596

attrname = request[1]

2082

1597

if callable(client_object.__getattribute__(attrname)):

2083

1598

parent_pipe.send(('function',))

2084

1599

else:

2085

parent_pipe.send(('data', client_object

2086

.__getattribute__(attrname)))

1600

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

2087

1601

2088

1602

if command == 'setattr':

2089

1603

attrname = request[1]

2090

1604

value = request[2]

2091

1605

setattr(client_object, attrname, value)

2092

1606

2093

1607

return True

2094

1608

2095

1609

2125

1639

elif suffix == "w":

2126

1640

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

2127

1641

else:

2128

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

2129

.format(suffix))

1642

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

2130

1643

except (ValueError, IndexError) as e:

2131

1644

raise ValueError(*(e.args))

2132

1645

timevalue += delta

2133

1646

return timevalue

2134

1647

2135

1648

1649

def if_nametoindex(interface):

1650

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

1651

1652

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

1653

global if_nametoindex

1654

try:

1655

if_nametoindex = (ctypes.cdll.LoadLibrary

1656

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

1657

.if_nametoindex)

1658

except (OSError, AttributeError):

1659

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

1660

def if_nametoindex(interface):

1661

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

1662

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

1663

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

1664

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1665

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

1666

interface))

1667

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

1668

ifreq[16:20])[0]

1669

return interface_index

1670

return if_nametoindex(interface)

1671

1672

2136

1673

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

2137

1674

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

2138

1675

2146

1683

sys.exit()

2147

1684

if not noclose:

2148

1685

# Close all standard open file descriptors

2149

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

1686

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

2150

1687

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

2151

1688

raise OSError(errno.ENODEV,

2152

"{0} not a character device"

2153

.format(os.devnull))

1689

"%s not a character device"

1690

% os.path.devnull)

2154

1691

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

2155

1692

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

2156

1693

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

2165

1702

2166

1703

parser = argparse.ArgumentParser()

2167

1704

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

2168

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

1705

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

2169

1706

help="show version number and exit")

2170

1707

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

2171

1708

help="Bind to interface IF")

2193

1730

" system bus interface")

2194

1731

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

2195

1732

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

2196

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

2197

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

2198

" state")

2199

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

2200

help="Specify a file descriptor to a network"

2201

" socket to use instead of creating one")

2202

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

2203

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

2204

2205

1733

options = parser.parse_args()

2206

1734

2207

1735

if options.check:

2220

1748

"use_dbus": "True",

2221

1749

"use_ipv6": "True",

2222

1750

"debuglevel": "",

2223

"restore": "True",

2224

"socket": "",

2225

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

2226

1751

}

2227

1752

2228

1753

# Parse config file for server-global settings

2239

1764

if server_settings["port"]:

2240

1765

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

2241

1766

"port")

2242

if server_settings["socket"]:

2243

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

2244

"socket")

2245

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

2246

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

2247

# happen with a supplied network socket.

2248

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

2249

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

2250

["socket"])

2251

1767

del server_config

2252

1768

2253

1769

# Override the settings from the config file with command line

2254

1770

# options, if set.

2255

1771

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

2256

1772

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

2257

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

2258

"statedir", "socket"):

1773

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

2259

1774

value = getattr(options, option)

2260

1775

if value is not None:

2261

1776

server_settings[option] = value

2273

1788

debuglevel = server_settings["debuglevel"]

2274

1789

use_dbus = server_settings["use_dbus"]

2275

1790

use_ipv6 = server_settings["use_ipv6"]

2276

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

2277

stored_state_file)

2278

2279

if debug:

2280

initlogger(debug, logging.DEBUG)

2281

else:

2282

if not debuglevel:

2283

initlogger(debug)

2284

else:

2285

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

2286

initlogger(debug, level)

2287

1791

2288

1792

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

2289

1793

syslogger.setFormatter(logging.Formatter

2290

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

2291

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

2292

.format(server_settings

2293

["servicename"])))

1794

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

1795

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

1796

% server_settings["servicename"]))

2294

1797

2295

1798

# Parse config file with clients

2296

client_config = configparser.SafeConfigParser(Client

2297

.client_defaults)

1799

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

1800

"interval": "5m",

1801

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

1802

"host": "",

1803

"approval_delay": "0s",

1804

"approval_duration": "1s",

1805

}

1806

client_config = configparser.SafeConfigParser(client_defaults)

2298

1807

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

2299

1808

"clients.conf"))

2300

1809

2309

1818

use_ipv6=use_ipv6,

2310

1819

gnutls_priority=

2311

1820

server_settings["priority"],

2312

use_dbus=use_dbus,

2313

socketfd=(server_settings["socket"]

2314

or None))

1821

use_dbus=use_dbus)

2315

1822

if not debug:

2316

1823

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

2317

1824

try:

2318

1825

pidfile = open(pidfilename, "w")

2319

except IOError as e:

2320

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

2321

exc_info=e)

1826

except IOError:

1827

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

2322

1828

2323

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

1829

try:

1830

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

1831

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

1832

except KeyError:

2324

1833

try:

2325

uid = pwd.getpwnam(name).pw_uid

2326

gid = pwd.getpwnam(name).pw_gid

2327

break

1834

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

1835

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

2328

1836

except KeyError:

2329

continue

2330

else:

2331

uid = 65534

2332

gid = 65534

1837

try:

1838

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

1839

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

1840

except KeyError:

1841

uid = 65534

1842

gid = 65534

2333

1843

try:

2334

1844

os.setgid(gid)

2335

1845

os.setuid(uid)

2336

1846

except OSError as error:

2337

if error.errno != errno.EPERM:

1847

if error[0] != errno.EPERM:

2338

1848

raise error

2339

1849

1850

if not debug and not debuglevel:

1851

syslogger.setLevel(logging.WARNING)

1852

console.setLevel(logging.WARNING)

1853

if debuglevel:

1854

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

1855

syslogger.setLevel(level)

1856

console.setLevel(level)

1857

2340

1858

if debug:

2341

1859

# Enable all possible GnuTLS debugging

2342

1860

2352

1870

.gnutls_global_set_log_function(debug_gnutls))

2353

1871

2354

1872

# Redirect stdin so all checkers get /dev/null

2355

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

1873

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

2356

1874

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

2357

1875

if null > 2:

2358

1876

os.close(null)

1877

else:

1878

# No console logging

1879

logger.removeHandler(console)

2359

1880

2360

1881

# Need to fork before connecting to D-Bus

2361

1882

if not debug:

2362

1883

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

2363

1884

daemon()

2364

1885

2365

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

2366

# need to inform gobject that threads will be used.

2367

gobject.threads_init()

2368

2369

1886

global main_loop

2370

1887

# From the Avahi example code

2371

DBusGMainLoop(set_as_default=True)

1888

DBusGMainLoop(set_as_default=True )

2372

1889

main_loop = gobject.MainLoop()

2373

1890

bus = dbus.SystemBus()

2374

1891

# End of Avahi example code

2375

1892

if use_dbus:

2376

1893

try:

2377

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

1894

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

2378

1895

bus, do_not_queue=True)

2379

old_bus_name = (dbus.service.BusName

2380

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

2381

do_not_queue=True))

2382

1896

except dbus.exceptions.NameExistsException as e:

2383

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

1897

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

2384

1898

use_dbus = False

2385

1899

server_settings["use_dbus"] = False

2386

1900

tcp_server.use_dbus = False

2387

1901

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2388

service = AvahiServiceToSyslog(name =

2389

server_settings["servicename"],

2390

servicetype = "_mandos._tcp",

2391

protocol = protocol, bus = bus)

1902

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

1903

servicetype = "_mandos._tcp",

1904

protocol = protocol, bus = bus)

2392

1905

if server_settings["interface"]:

2393

1906

service.interface = (if_nametoindex

2394

1907

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

2399

1912

client_class = Client

2400

1913

if use_dbus:

2401

1914

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

2402

2403

client_settings = Client.config_parser(client_config)

2404

old_client_settings = {}

2405

clients_data = {}

2406

2407

# Get client data and settings from last running state.

2408

if server_settings["restore"]:

2409

try:

2410

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

2411

clients_data, old_client_settings = (pickle.load

2412

(stored_state))

2413

os.remove(stored_state_path)

2414

except IOError as e:

2415

if e.errno == errno.ENOENT:

2416

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

2417

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

2418

else:

2419

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

2420

exc_info=e)

2421

raise

2422

except EOFError as e:

2423

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

2424

"EOFError:", exc_info=e)

2425

2426

with PGPEngine() as pgp:

2427

for client_name, client in clients_data.iteritems():

2428

# Decide which value to use after restoring saved state.

2429

# We have three different values: Old config file,

2430

# new config file, and saved state.

2431

# New config value takes precedence if it differs from old

2432

# config value, otherwise use saved state.

2433

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

2434

try:

2435

# For each value in new config, check if it

2436

# differs from the old config value (Except for

2437

# the "secret" attribute)

2438

if (name != "secret" and

2439

value != old_client_settings[client_name]

2440

[name]):

2441

client[name] = value

2442

except KeyError:

2443

pass

2444

2445

# Clients who has passed its expire date can still be

2446

# enabled if its last checker was successful. Clients

2447

# whose checker succeeded before we stored its state is

2448

# assumed to have successfully run all checkers during

2449

# downtime.

2450

if client["enabled"]:

2451

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

2452

if not client["last_checked_ok"]:

2453

logger.warning(

2454

"disabling client {0} - Client never "

2455

"performed a successful checker"

2456

.format(client_name))

2457

client["enabled"] = False

2458

elif client["last_checker_status"] != 0:

2459

logger.warning(

2460

"disabling client {0} - Client "

2461

"last checker failed with error code {1}"

2462

.format(client_name,

2463

client["last_checker_status"]))

2464

client["enabled"] = False

2465

else:

2466

client["expires"] = (datetime.datetime

2467

.utcnow()

2468

+ client["timeout"])

2469

logger.debug("Last checker succeeded,"

2470

" keeping {0} enabled"

2471

.format(client_name))

1915

def client_config_items(config, section):

1916

special_settings = {

1917

"approved_by_default":

1918

lambda: config.getboolean(section,

1919

"approved_by_default"),

1920

}

1921

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

2472

1922

try:

2473

client["secret"] = (

2474

pgp.decrypt(client["encrypted_secret"],

2475

client_settings[client_name]

2476

["secret"]))

2477

except PGPError:

2478

# If decryption fails, we use secret from new settings

2479

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

2480

.format(client_name))

2481

client["secret"] = (

2482

client_settings[client_name]["secret"])

2483

2484

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

2485

for client_name in (set(old_client_settings)

2486

- set(client_settings)):

2487

del clients_data[client_name]

2488

for client_name in (set(client_settings)

2489

- set(old_client_settings)):

2490

clients_data[client_name] = client_settings[client_name]

2491

2492

# Create all client objects

2493

for client_name, client in clients_data.iteritems():

2494

tcp_server.clients[client_name] = client_class(

2495

name = client_name, settings = client)

2496

1923

yield (name, special_settings[name]())

1924

except KeyError:

1925

yield (name, value)

1926

1927

tcp_server.clients.update(set(

1928

client_class(name = section,

1929

config= dict(client_config_items(

1930

client_config, section)))

1931

for section in client_config.sections()))

2497

1932

if not tcp_server.clients:

2498

1933

logger.warning("No clients defined")

2499

1934

2500

1935

if not debug:

2501

1936

try:

2502

1937

with pidfile:

2510

1945

# "pidfile" was never created

2511

1946

pass

2512

1947

del pidfilename

2513

1948

1949

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

1950

2514

1951

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

2515

1952

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

2516

1953

2517

1954

if use_dbus:

2518

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

2519

"se.bsnet.fukt.Mandos"})

2520

class MandosDBusService(DBusObjectWithProperties):

1955

class MandosDBusService(dbus.service.Object):

2521

1956

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

2522

1957

def __init__(self):

2523

1958

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

2524

_interface = "se.recompile.Mandos"

2525

2526

@dbus_interface_annotations(_interface)

2527

def _foo(self):

2528

return { "org.freedesktop.DBus.Property"

2529

".EmitsChangedSignal":

2530

"false"}

1959

_interface = "se.bsnet.fukt.Mandos"

2531

1960

2532

1961

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

2533

1962

def ClientAdded(self, objpath):

2548

1977

def GetAllClients(self):

2549

1978

"D-Bus method"

2550

1979

return dbus.Array(c.dbus_object_path

2551

for c in

2552

tcp_server.clients.itervalues())

1980

for c in tcp_server.clients)

2553

1981

2554

1982

@dbus.service.method(_interface,

2555

1983

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

2557

1985

"D-Bus method"

2558

1986

return dbus.Dictionary(

2559

1987

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

2560

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

1988

for c in tcp_server.clients),

2561

1989

signature="oa{sv}")

2562

1990

2563

1991

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

2564

1992

def RemoveClient(self, object_path):

2565

1993

"D-Bus method"

2566

for c in tcp_server.clients.itervalues():

1994

for c in tcp_server.clients:

2567

1995

if c.dbus_object_path == object_path:

2568

del tcp_server.clients[c.name]

1996

tcp_server.clients.remove(c)

2569

1997

c.remove_from_connection()

2570

1998

# Don't signal anything except ClientRemoved

2571

1999

c.disable(quiet=True)

2582

2010

"Cleanup function; run on exit"

2583

2011

service.cleanup()

2584

2012

2585

multiprocessing.active_children()

2586

if not (tcp_server.clients or client_settings):

2587

return

2588

2589

# Store client before exiting. Secrets are encrypted with key

2590

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

2591

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

2592

clients = {}

2593

with PGPEngine() as pgp:

2594

for client in tcp_server.clients.itervalues():

2595

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

2596

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

2597

key)

2598

client_dict = {}

2599

2600

# A list of attributes that can not be pickled

2601

# + secret.

2602

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

2603

"checker"))

2604

for name, typ in (inspect.getmembers

2605

(dbus.service.Object)):

2606

exclude.add(name)

2607

2608

client_dict["encrypted_secret"] = (client

2609

.encrypted_secret)

2610

for attr in client.client_structure:

2611

if attr not in exclude:

2612

client_dict[attr] = getattr(client, attr)

2613

2614

clients[client.name] = client_dict

2615

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

2616

2617

try:

2618

with (tempfile.NamedTemporaryFile

2619

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

2620

dir=os.path.dirname(stored_state_path),

2621

delete=False)) as stored_state:

2622

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

2623

tempname=stored_state.name

2624

os.rename(tempname, stored_state_path)

2625

except (IOError, OSError) as e:

2626

if not debug:

2627

try:

2628

os.remove(tempname)

2629

except NameError:

2630

pass

2631

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

2632

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

2633

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

2634

else:

2635

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

2636

exc_info=e)

2637

raise e

2638

2639

# Delete all clients, and settings from config

2640

2013

while tcp_server.clients:

2641

name, client = tcp_server.clients.popitem()

2014

client = tcp_server.clients.pop()

2642

2015

if use_dbus:

2643

2016

client.remove_from_connection()

2017

client.disable_hook = None

2644

2018

# Don't signal anything except ClientRemoved

2645

2019

client.disable(quiet=True)

2646

2020

if use_dbus:

2647

2021

# Emit D-Bus signal

2648

mandos_dbus_service.ClientRemoved(client

2649

.dbus_object_path,

2022

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2650

2023

client.name)

2651

client_settings.clear()

2652

2024

2653

2025

atexit.register(cleanup)

2654

2026

2655

for client in tcp_server.clients.itervalues():

2027

for client in tcp_server.clients:

2656

2028

if use_dbus:

2657

2029

# Emit D-Bus signal

2658

2030

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2659

# Need to initiate checking of clients

2660

if client.enabled:

2661

client.init_checker()

2031

client.enable()

2662

2032

2663

2033

tcp_server.enable()

2664

2034

tcp_server.server_activate()

2667

2037

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

2668

2038

if use_ipv6:

2669

2039

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

2670

" flowinfo %d, scope_id %d",

2671

*tcp_server.socket.getsockname())

2040

" flowinfo %d, scope_id %d"

2041

% tcp_server.socket.getsockname())

2672

2042

else: # IPv4

2673

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

2674

*tcp_server.socket.getsockname())

2043

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

2044

% tcp_server.socket.getsockname())

2675

2045

2676

2046

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

2677

2047

2680

2050

try:

2681

2051

service.activate()

2682

2052

except dbus.exceptions.DBusException as error:

2683

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

2053

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

2684

2054

cleanup()

2685

2055

sys.exit(1)

2686

2056

# End of Avahi example code

2693

2063

logger.debug("Starting main loop")

2694

2064

main_loop.run()

2695

2065

except AvahiError as error:

2696

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

2066

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

2697

2067

cleanup()

2698

2068

sys.exit(1)

2699

2069

except KeyboardInterrupt: