/mandos/release : revision 237.7.154

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

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#

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# Everything else is

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#

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

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

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# along with this program. If not, see

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

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#

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

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

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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import SocketServer as socketserver

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import socket

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import argparse

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import functools

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import 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 = "1.3.1"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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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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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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

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"""init logger and add loglevel"""

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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

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pass

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class PGPEngine(object):

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

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def __init__(self):

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self.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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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.GetAlternativeServiceName(self.name))

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self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

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

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self.name)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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def remove(self):

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

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self .entry_group_state_changed))

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'StateChanged', self.entry_group_state_changed))

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

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self.name, self.type)

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self.group.AddService(

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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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unicode(error))

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raise AvahiGroupError("State changed: %s"

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% unicode(error))

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

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.format(error))

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def cleanup(self):

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

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if self.group is not None:

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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException) as e:

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dbus.exceptions.DBusException):

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pass

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self.group = None

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self.remove()

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

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

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

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

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else:

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

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def activate(self):

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

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if self.server is None:

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

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class AvahiServiceToSyslog(AvahiService):

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def rename(self):

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

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ret = AvahiService.rename(self)

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syslogger.setFormatter(logging.Formatter

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

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

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.format(self.name)))

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return ret

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def timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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class Client(object):

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

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Attributes:

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

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

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

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

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

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

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checker_initiator_tag: a gobject event source tag, or None

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

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client_structure: Object describing what attributes a client has

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and is used for storing the client at exit

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current_checker_command: string; current running checker_command

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

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disable_initiator_tag: a gobject event source tag, or None

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enabled: bool()

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

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

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

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

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last_enabled: datetime.datetime(); (UTC)

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last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, -2 means no checker completed yet.

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

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

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D-Bus identifiers

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

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

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until this client is disabled

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extended_timeout: extra long timeout when password has been sent

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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", "fingerprint",

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

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

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

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"last_approval_request", "last_checked_ok",

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

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@staticmethod

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def _timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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client_defaults = { "timeout": "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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def timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

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return self._timedelta_to_milliseconds(self.timeout)

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return timedelta_to_milliseconds(self.timeout)

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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return self._timedelta_to_milliseconds(self.extended_timeout)

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return timedelta_to_milliseconds(self.extended_timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return self._timedelta_to_milliseconds(self.interval)

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return timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

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return self._timedelta_to_milliseconds(self.approval_delay)

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

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

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

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attribute."""

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return timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

476

def config_parser(config):

477

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

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

479

with exceptions for any special settings as defined above.

480

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():

485

section = dict(config.items(client_name))

486

client = settings[client_name] = {}

487

488

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

489

# 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()

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.replace(" ", ""))

497

if "secret" in section:

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

499

elif "secfile" in section:

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

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(section["secfile"])),

502

"rb") as secfile:

503

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

504

else:

505

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

506

.format(section))

507

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

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client["extended_timeout"] = string_to_delta(

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section["extended_timeout"])

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

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client["approval_delay"] = string_to_delta(

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section["approval_delay"])

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client["approval_duration"] = string_to_delta(

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section["approval_duration"])

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

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client["last_approval_request"] = None

517

client["last_checked_ok"] = None

518

client["last_checker_status"] = -2

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520

return settings

521

522

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

337

523

self.name = name

338

if config is None:

339

config = {}

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

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

341

539

# Uppercase and remove spaces from fingerprint for later

342

540

# comparison purposes with return value from the fingerprint()

343

541

# function

344

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

345

.replace(" ", ""))

346

542

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

347

if "secret" in config:

348

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

349

elif "secfile" in config:

350

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

351

(config["secfile"])),

352

"rb") as secfile:

353

self.secret = secfile.read()

354

else:

355

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

356

% self.name)

357

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

358

self.created = datetime.datetime.utcnow()

359

self.enabled = False

360

self.last_approval_request = None

361

self.last_enabled = None

362

self.last_checked_ok = None

363

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

364

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

365

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

366

self.disable_hook = disable_hook

543

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

544

datetime.datetime.utcnow())

545

546

# attributes specific for this server instance

367

547

self.checker = None

368

548

self.checker_initiator_tag = None

369

549

self.disable_initiator_tag = None

370

self.expires = None

371

550

self.checker_callback_tag = None

372

self.checker_command = config["checker"]

373

551

self.current_checker_command = None

374

self.last_connect = None

375

self._approved = None

376

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

377

True)

552

self.approved = None

378

553

self.approvals_pending = 0

379

self.approval_delay = string_to_delta(

380

config["approval_delay"])

381

self.approval_duration = string_to_delta(

382

config["approval_duration"])

383

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

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)

384

568

569

# Send notice to process children that client state has changed

385

570

def send_changedstate(self):

386

self.changedstate.acquire()

387

self.changedstate.notify_all()

388

self.changedstate.release()

389

571

with self.changedstate:

572

self.changedstate.notify_all()

573

390

574

def enable(self):

391

575

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

392

576

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

393

577

# Already enabled

394

578

return

395

self.send_changedstate()

579

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

580

self.enabled = True

396

581

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):

397

609

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

398

610

# and every interval from then on.

611

if self.checker_initiator_tag is not None:

612

gobject.source_remove(self.checker_initiator_tag)

399

613

self.checker_initiator_tag = (gobject.timeout_add

400

614

(self.interval_milliseconds(),

401

615

self.start_checker))

402

616

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

403

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

617

if self.disable_initiator_tag is not None:

618

gobject.source_remove(self.disable_initiator_tag)

404

619

self.disable_initiator_tag = (gobject.timeout_add

405

620

(self.timeout_milliseconds(),

406

621

self.disable))

407

self.enabled = True

408

622

# Also start a new checker *right now*.

409

623

self.start_checker()

410

624

411

def disable(self, quiet=True):

412

"""Disable this client."""

413

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

414

return False

415

if not quiet:

416

self.send_changedstate()

417

if not quiet:

418

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

419

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

420

gobject.source_remove(self.disable_initiator_tag)

421

self.disable_initiator_tag = None

422

self.expires = None

423

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

424

gobject.source_remove(self.checker_initiator_tag)

425

self.checker_initiator_tag = None

426

self.stop_checker()

427

if self.disable_hook:

428

self.disable_hook(self)

429

self.enabled = False

430

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

431

return False

432

433

def __del__(self):

434

self.disable_hook = None

435

self.disable()

436

437

625

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

438

626

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

439

627

self.checker_callback_tag = None

440

628

self.checker = None

441

629

if os.WIFEXITED(condition):

442

exitstatus = os.WEXITSTATUS(condition)

443

if exitstatus == 0:

630

self.last_checker_status = os.WEXITSTATUS(condition)

631

if self.last_checker_status == 0:

444

632

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

445

633

vars(self))

446

634

self.checked_ok()

448

636

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

449

637

vars(self))

450

638

else:

639

self.last_checker_status = -1

451

640

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

452

641

vars(self))

453

642

454

def checked_ok(self, timeout=None):

455

"""Bump up the timeout for this client.

456

457

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

458

alive and well.

459

"""

643

def checked_ok(self):

644

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

645

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."""

460

651

if timeout is None:

461

652

timeout = self.timeout

462

self.last_checked_ok = datetime.datetime.utcnow()

463

gobject.source_remove(self.disable_initiator_tag)

464

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

465

self.disable_initiator_tag = (gobject.timeout_add

466

(self._timedelta_to_milliseconds(timeout),

467

self.disable))

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

468

661

469

662

def need_approval(self):

470

663

self.last_approval_request = datetime.datetime.utcnow()

475

668

If a checker already exists, leave it running and do

476

669

nothing."""

477

670

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

478

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

479

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

480

# client would inevitably timeout, since no checker would get

481

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

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

482

675

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

483

676

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

484

677

# should be.

498

691

self.current_checker_command)

499

692

# Start a new checker if needed

500

693

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)

501

699

try:

502

# In case checker_command has exactly one % operator

503

command = self.checker_command % self.host

504

except TypeError:

505

# Escape attributes for the shell

506

escaped_attrs = dict(

507

(attr,

508

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

509

errors=

510

'replace')))

511

for attr in

512

self.runtime_expansions)

513

514

try:

515

command = self.checker_command % escaped_attrs

516

except TypeError as error:

517

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

518

' %s', self.checker_command, error)

519

return True # Try again later

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

520

705

self.current_checker_command = command

521

706

try:

522

707

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

528

713

self.checker = subprocess.Popen(command,

529

714

close_fds=True,

530

715

shell=True, cwd="/")

531

self.checker_callback_tag = (gobject.child_watch_add

532

(self.checker.pid,

533

self.checker_callback,

534

data=command))

535

# The checker may have completed before the gobject

536

# watch was added. Check for this.

537

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

538

if pid:

539

gobject.source_remove(self.checker_callback_tag)

540

self.checker_callback(pid, status, command)

541

716

except OSError as error:

542

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

543

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)

544

729

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

545

730

return True

546

731

553

738

return

554

739

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

555

740

try:

556

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

741

self.checker.terminate()

557

742

#time.sleep(0.5)

558

743

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

559

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

744

# self.checker.kill()

560

745

except OSError as error:

561

746

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

562

747

raise

563

748

self.checker = None

564

749

750

565

751

def dbus_service_property(dbus_interface, signature="v",

566

752

access="readwrite", byte_arrays=False):

567

753

"""Decorators for marking methods of a DBusObjectWithProperties to

578

764

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

579

765

if byte_arrays and signature != "ay":

580

766

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

581

" signature %r" % signature)

767

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

582

768

def decorator(func):

583

769

func._dbus_is_property = True

584

770

func._dbus_interface = dbus_interface

592

778

return decorator

593

779

594

780

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

595

818

class DBusPropertyException(dbus.exceptions.DBusException):

596

819

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

597

820

"""

613

836

614

837

class DBusObjectWithProperties(dbus.service.Object):

615

838

"""A D-Bus object with properties.

616

839

617

840

Classes inheriting from this can use the dbus_service_property

618

841

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

619

842

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

620

843

"""

621

844

622

845

@staticmethod

623

def _is_dbus_property(obj):

624

return getattr(obj, "_dbus_is_property", False)

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)

625

854

626

def _get_all_dbus_properties(self):

855

def _get_all_dbus_things(self, thing):

627

856

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

628

857

"""

629

return ((prop._dbus_name, prop)

630

for name, prop in

631

inspect.getmembers(self, self._is_dbus_property))

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)))

632

865

633

866

def _get_dbus_property(self, interface_name, property_name):

634

867

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

635

868

property with the specified name and interface.

636

869

"""

637

for name in (property_name,

638

property_name + "_dbus_property"):

639

prop = getattr(self, name, None)

640

if (prop is None

641

or not self._is_dbus_property(prop)

642

or prop._dbus_name != property_name

643

or (interface_name and prop._dbus_interface

644

and interface_name != prop._dbus_interface)):

645

continue

646

return prop

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

647

878

# No such property

648

879

raise DBusPropertyNotFound(self.dbus_object_path + ":"

649

880

+ interface_name + "."

674

905

# signatures other than "ay".

675

906

if prop._dbus_signature != "ay":

676

907

raise ValueError

677

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

678

for byte in value))

908

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

909

for byte in value))

679

910

prop(value)

680

911

681

912

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

683

914

def GetAll(self, interface_name):

684

915

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

685

916

standard.

686

917

687

918

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

688

919

"""

689

all = {}

690

for name, prop in self._get_all_dbus_properties():

920

properties = {}

921

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

691

922

if (interface_name

692

923

and interface_name != prop._dbus_interface):

693

924

# Interface non-empty but did not match

697

928

continue

698

929

value = prop()

699

930

if not hasattr(value, "variant_level"):

700

all[name] = value

931

properties[name] = value

701

932

continue

702

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

703

value.variant_level+1)

704

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

933

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

934

value.variant_level+1)

935

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

705

936

706

937

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

707

938

out_signature="s",

708

939

path_keyword='object_path',

709

940

connection_keyword='connection')

710

941

def Introspect(self, object_path, connection):

711

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

942

"""Overloading of standard D-Bus method.

943

944

Inserts property tags and interface annotation tags.

712

945

"""

713

946

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

714

947

connection)

721

954

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

722

955

return e

723

956

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

957

# Add property tags

724

958

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

725

959

for name, prop

726

in self._get_all_dbus_properties()

960

in self._get_all_dbus_things("property")

727

961

if prop._dbus_interface

728

962

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

729

963

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)

730

995

# Add the names to the return values for the

731

996

# "org.freedesktop.DBus.Properties" methods

732

997

if (if_tag.getAttribute("name")

747

1012

except (AttributeError, xml.dom.DOMException,

748

1013

xml.parsers.expat.ExpatError) as error:

749

1014

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

750

error)

1015

exc_info=error)

751

1016

return xmlstring

752

1017

753

1018

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"})

754

1198

class ClientDBus(Client, DBusObjectWithProperties):

755

1199

"""A Client class using D-Bus

756

1200

765

1209

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

766

1210

767

1211

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

768

self._approvals_pending = 0

769

1212

self.bus = bus

770

1213

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

771

1214

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

777

1220

("/clients/" + client_object_name))

778

1221

DBusObjectWithProperties.__init__(self, self.bus,

779

1222

self.dbus_object_path)

780

def _set_expires(self, value):

781

old_value = getattr(self, "_expires", None)

782

self._expires = value

783

if hasattr(self, "dbus_object_path") and old_value != value:

784

dbus_time = (self._datetime_to_dbus(self._expires,

785

variant_level=1))

786

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

787

dbus_time)

788

expires = property(lambda self: self._expires, _set_expires)

789

del _set_expires

790

791

def _get_approvals_pending(self):

792

return self._approvals_pending

793

def _set_approvals_pending(self, value):

794

old_value = self._approvals_pending

795

self._approvals_pending = value

796

bval = bool(value)

797

if (hasattr(self, "dbus_object_path")

798

and bval is not bool(old_value)):

799

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

800

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

801

dbus_bool)

802

803

approvals_pending = property(_get_approvals_pending,

804

_set_approvals_pending)

805

del _get_approvals_pending, _set_approvals_pending

806

807

@staticmethod

808

def _datetime_to_dbus(dt, variant_level=0):

809

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

810

if dt is None:

811

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

812

return dbus.String(dt.isoformat(),

813

variant_level=variant_level)

814

815

def enable(self):

816

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

817

r = Client.enable(self)

818

if oldstate != self.enabled:

819

# Emit D-Bus signals

820

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

821

dbus.Boolean(True, variant_level=1))

822

self.PropertyChanged(

823

dbus.String("LastEnabled"),

824

self._datetime_to_dbus(self.last_enabled,

825

variant_level=1))

826

return r

827

828

def disable(self, quiet = False):

829

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

830

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

831

if not quiet and oldstate != self.enabled:

832

# Emit D-Bus signal

833

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

834

dbus.Boolean(False, variant_level=1))

835

return r

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

836

1291

837

1292

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

838

1293

try:

847

1302

*args, **kwargs):

848

1303

self.checker_callback_tag = None

849

1304

self.checker = None

850

# Emit D-Bus signal

851

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

852

dbus.Boolean(False, variant_level=1))

853

1305

if os.WIFEXITED(condition):

854

1306

exitstatus = os.WEXITSTATUS(condition)

855

1307

# Emit D-Bus signal

865

1317

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

866

1318

*args, **kwargs)

867

1319

868

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

869

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

870

# Emit D-Bus signal

871

self.PropertyChanged(

872

dbus.String("LastCheckedOK"),

873

(self._datetime_to_dbus(self.last_checked_ok,

874

variant_level=1)))

875

876

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

877

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

878

# Emit D-Bus signal

879

self.PropertyChanged(

880

dbus.String("LastApprovalRequest"),

881

(self._datetime_to_dbus(self.last_approval_request,

882

variant_level=1)))

883

return r

884

885

1320

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

886

1321

old_checker = self.checker

887

1322

if self.checker is not None:

894

1329

and old_checker_pid != self.checker.pid):

895

1330

# Emit D-Bus signal

896

1331

self.CheckerStarted(self.current_checker_command)

897

self.PropertyChanged(

898

dbus.String("CheckerRunning"),

899

dbus.Boolean(True, variant_level=1))

900

1332

return r

901

1333

902

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

903

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

904

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

905

if (old_checker is not None

906

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

907

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

908

dbus.Boolean(False, variant_level=1))

909

return r

910

911

1334

def _reset_approved(self):

912

self._approved = None

1335

self.approved = None

913

1336

return False

914

1337

915

1338

def approve(self, value=True):

916

self.send_changedstate()

917

self._approved = value

918

gobject.timeout_add(self._timedelta_to_milliseconds

1339

self.approved = value

1340

gobject.timeout_add(timedelta_to_milliseconds

919

1341

(self.approval_duration),

920

1342

self._reset_approved)

921

1343

self.send_changedstate()

922

1344

923

1345

## D-Bus methods, signals & properties

924

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

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"}

925

1354

926

1355

## Signals

927

1356

1012

1441

def ApprovedByDefault_dbus_property(self, value=None):

1013

1442

if value is None: # get

1014

1443

return dbus.Boolean(self.approved_by_default)

1015

old_value = self.approved_by_default

1016

1444

self.approved_by_default = bool(value)

1017

# Emit D-Bus signal

1018

if old_value != self.approved_by_default:

1019

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

1020

dbus.Boolean(value, variant_level=1))

1021

1445

1022

1446

# ApprovalDelay - property

1023

1447

@dbus_service_property(_interface, signature="t",

1025

1449

def ApprovalDelay_dbus_property(self, value=None):

1026

1450

if value is None: # get

1027

1451

return dbus.UInt64(self.approval_delay_milliseconds())

1028

old_value = self.approval_delay

1029

1452

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

1030

# Emit D-Bus signal

1031

if old_value != self.approval_delay:

1032

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

1033

dbus.UInt64(value, variant_level=1))

1034

1453

1035

1454

# ApprovalDuration - property

1036

1455

@dbus_service_property(_interface, signature="t",

1037

1456

access="readwrite")

1038

1457

def ApprovalDuration_dbus_property(self, value=None):

1039

1458

if value is None: # get

1040

return dbus.UInt64(self._timedelta_to_milliseconds(

1459

return dbus.UInt64(timedelta_to_milliseconds(

1041

1460

self.approval_duration))

1042

old_value = self.approval_duration

1043

1461

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

1044

# Emit D-Bus signal

1045

if old_value != self.approval_duration:

1046

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

1047

dbus.UInt64(value, variant_level=1))

1048

1462

1049

1463

# Name - property

1050

1464

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

1062

1476

def Host_dbus_property(self, value=None):

1063

1477

if value is None: # get

1064

1478

return dbus.String(self.host)

1065

old_value = self.host

1066

self.host = value

1067

# Emit D-Bus signal

1068

if old_value != self.host:

1069

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

1070

dbus.String(value, variant_level=1))

1479

self.host = unicode(value)

1071

1480

1072

1481

# Created - property

1073

1482

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

1074

1483

def Created_dbus_property(self):

1075

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

1484

return datetime_to_dbus(self.created)

1076

1485

1077

1486

# LastEnabled - property

1078

1487

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

1079

1488

def LastEnabled_dbus_property(self):

1080

return self._datetime_to_dbus(self.last_enabled)

1489

return datetime_to_dbus(self.last_enabled)

1081

1490

1082

1491

# Enabled - property

1083

1492

@dbus_service_property(_interface, signature="b",

1097

1506

if value is not None:

1098

1507

self.checked_ok()

1099

1508

return

1100

return self._datetime_to_dbus(self.last_checked_ok)

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)

1101

1516

1102

1517

# Expires - property

1103

1518

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

1104

1519

def Expires_dbus_property(self):

1105

return self._datetime_to_dbus(self.expires)

1520

return datetime_to_dbus(self.expires)

1106

1521

1107

1522

# LastApprovalRequest - property

1108

1523

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

1109

1524

def LastApprovalRequest_dbus_property(self):

1110

return self._datetime_to_dbus(self.last_approval_request)

1525

return datetime_to_dbus(self.last_approval_request)

1111

1526

1112

1527

# Timeout - property

1113

1528

@dbus_service_property(_interface, signature="t",

1115

1530

def Timeout_dbus_property(self, value=None):

1116

1531

if value is None: # get

1117

1532

return dbus.UInt64(self.timeout_milliseconds())

1118

old_value = self.timeout

1533

old_timeout = self.timeout

1119

1534

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

1120

# Emit D-Bus signal

1121

if old_value != self.timeout:

1122

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

1123

dbus.UInt64(value, variant_level=1))

1124

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

1125

return

1126

# Reschedule timeout

1127

gobject.source_remove(self.disable_initiator_tag)

1128

self.disable_initiator_tag = None

1129

self.expires = None

1130

time_to_die = (self.

1131

_timedelta_to_milliseconds((self

1132

.last_checked_ok

1133

+ self.timeout)

1134

- datetime.datetime

1135

.utcnow()))

1136

if time_to_die <= 0:

1137

# The timeout has passed

1138

self.disable()

1139

else:

1140

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

1141

+ datetime.timedelta(milliseconds = time_to_die))

1142

self.disable_initiator_tag = (gobject.timeout_add

1143

(time_to_die, self.disable))

1144

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

1145

1552

# ExtendedTimeout - property

1146

1553

@dbus_service_property(_interface, signature="t",

1147

1554

access="readwrite")

1148

1555

def ExtendedTimeout_dbus_property(self, value=None):

1149

1556

if value is None: # get

1150

1557

return dbus.UInt64(self.extended_timeout_milliseconds())

1151

old_value = self.extended_timeout

1152

1558

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

1153

# Emit D-Bus signal

1154

if old_value != self.extended_timeout:

1155

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

1156

dbus.UInt64(value, variant_level=1))

1157

1559

1158

1560

# Interval - property

1159

1561

@dbus_service_property(_interface, signature="t",

1160

1562

access="readwrite")

1161

1563

def Interval_dbus_property(self, value=None):

1162

1564

if value is None: # get

1163

1565

return dbus.UInt64(self.interval_milliseconds())

1164

old_value = self.interval

1165

1566

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

1166

# Emit D-Bus signal

1167

if old_value != self.interval:

1168

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

1169

dbus.UInt64(value, variant_level=1))

1170

1567

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

1171

1568

return

1172

# Reschedule checker run

1173

gobject.source_remove(self.checker_initiator_tag)

1174

self.checker_initiator_tag = (gobject.timeout_add

1175

(value, self.start_checker))

1176

self.start_checker() # Start one now, too

1177

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

1178

1576

# Checker - property

1179

1577

@dbus_service_property(_interface, signature="s",

1180

1578

access="readwrite")

1181

1579

def Checker_dbus_property(self, value=None):

1182

1580

if value is None: # get

1183

1581

return dbus.String(self.checker_command)

1184

old_value = self.checker_command

1185

self.checker_command = value

1186

# Emit D-Bus signal

1187

if old_value != self.checker_command:

1188

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

1189

dbus.String(self.checker_command,

1190

variant_level=1))

1582

self.checker_command = unicode(value)

1191

1583

1192

1584

# CheckerRunning - property

1193

1585

@dbus_service_property(_interface, signature="b",

1220

1612

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

1221

1613

if not self._pipe.recv():

1222

1614

raise KeyError()

1223

1615

1224

1616

def __getattribute__(self, name):

1225

if(name == '_pipe'):

1617

if name == '_pipe':

1226

1618

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

1227

1619

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

1228

1620

data = self._pipe.recv()

1233

1625

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

1234

1626

return self._pipe.recv()[1]

1235

1627

return func

1236

1628

1237

1629

def __setattr__(self, name, value):

1238

if(name == '_pipe'):

1630

if name == '_pipe':

1239

1631

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

1240

1632

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

1241

1633

1252

1644

unicode(self.client_address))

1253

1645

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

1254

1646

self.server.child_pipe.fileno())

1255

1647

1256

1648

session = (gnutls.connection

1257

1649

.ClientSession(self.request,

1258

1650

gnutls.connection

1259

1651

.X509Credentials()))

1260

1652

1261

1653

# Note: gnutls.connection.X509Credentials is really a

1262

1654

# generic GnuTLS certificate credentials object so long as

1263

1655

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

1264

1656

# here despite using OpenPGP certificates.

1265

1657

1266

1658

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

1267

1659

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

1268

1660

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

1274

1666

(gnutls.library.functions

1275

1667

.gnutls_priority_set_direct(session._c_object,

1276

1668

priority, None))

1277

1669

1278

1670

# Start communication using the Mandos protocol

1279

1671

# Get protocol number

1280

1672

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

1285

1677

except (ValueError, IndexError, RuntimeError) as error:

1286

1678

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

1287

1679

return

1288

1680

1289

1681

# Start GnuTLS connection

1290

1682

try:

1291

1683

session.handshake()

1295

1687

# established. Just abandon the request.

1296

1688

return

1297

1689

logger.debug("Handshake succeeded")

1298

1690

1299

1691

approval_required = False

1300

1692

try:

1301

1693

try:

1306

1698

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

1307

1699

return

1308

1700

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

1309

1701

1310

1702

try:

1311

1703

client = ProxyClient(child_pipe, fpr,

1312

1704

self.client_address)

1324

1716

client.name)

1325

1717

if self.server.use_dbus:

1326

1718

# Emit D-Bus signal

1327

client.Rejected("Disabled")

1719

client.Rejected("Disabled")

1328

1720

return

1329

1721

1330

if client._approved or not client.approval_delay:

1722

if client.approved or not client.approval_delay:

1331

1723

#We are approved or approval is disabled

1332

1724

break

1333

elif client._approved is None:

1725

elif client.approved is None:

1334

1726

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

1335

1727

client.name)

1336

1728

if self.server.use_dbus:

1347

1739

return

1348

1740

1349

1741

#wait until timeout or approved

1350

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

1351

1742

time = datetime.datetime.now()

1352

1743

client.changedstate.acquire()

1353

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

1744

client.changedstate.wait(

1745

float(timedelta_to_milliseconds(delay)

1746

/ 1000))

1354

1747

client.changedstate.release()

1355

1748

time2 = datetime.datetime.now()

1356

1749

if (time2 - time) >= delay:

1372

1765

try:

1373

1766

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

1374

1767

except gnutls.errors.GNUTLSError as error:

1375

logger.warning("gnutls send failed")

1768

logger.warning("gnutls send failed",

1769

exc_info=error)

1376

1770

return

1377

1771

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

1378

1772

sent, len(client.secret)

1379

1773

- (sent_size + sent))

1380

1774

sent_size += sent

1381

1775

1382

1776

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

1383

# bump the timeout as if seen

1384

client.checked_ok(client.extended_timeout)

1777

# bump the timeout using extended_timeout

1778

client.bump_timeout(client.extended_timeout)

1385

1779

if self.server.use_dbus:

1386

1780

# Emit D-Bus signal

1387

1781

client.GotSecret()

1392

1786

try:

1393

1787

session.bye()

1394

1788

except gnutls.errors.GNUTLSError as error:

1395

logger.warning("GnuTLS bye failed")

1789

logger.warning("GnuTLS bye failed",

1790

exc_info=error)

1396

1791

1397

1792

@staticmethod

1398

1793

def peer_certificate(session):

1454

1849

# Convert the buffer to a Python bytestring

1455

1850

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

1456

1851

# Convert the bytestring to hexadecimal notation

1457

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

1852

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

1458

1853

return hex_fpr

1459

1854

1460

1855

1463

1858

def sub_process_main(self, request, address):

1464

1859

try:

1465

1860

self.finish_request(request, address)

1466

except:

1861

except Exception:

1467

1862

self.handle_error(request, address)

1468

1863

self.close_request(request)

1469

1864

1470

1865

def process_request(self, request, address):

1471

1866

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

1472

multiprocessing.Process(target = self.sub_process_main,

1473

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

1867

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

1868

args = (request, address))

1869

proc.start()

1870

return proc

1871

1474

1872

1475

1873

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1476

1874

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

1480

1878

This function creates a new pipe in self.pipe

1481

1879

"""

1482

1880

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1483

1484

super(MultiprocessingMixInWithPipe,

1485

self).process_request(request, client_address)

1881

1882

proc = MultiprocessingMixIn.process_request(self, request,

1883

client_address)

1486

1884

self.child_pipe.close()

1487

self.add_pipe(parent_pipe)

1488

1489

def add_pipe(self, parent_pipe):

1885

self.add_pipe(parent_pipe, proc)

1886

1887

def add_pipe(self, parent_pipe, proc):

1490

1888

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

1491

1889

raise NotImplementedError

1492

1890

1891

1493

1892

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1494

1893

socketserver.TCPServer, object):

1495

1894

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

1500

1899

use_ipv6: Boolean; to use IPv6 or not

1501

1900

"""

1502

1901

def __init__(self, server_address, RequestHandlerClass,

1503

interface=None, use_ipv6=True):

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

"""

1504

1906

self.interface = interface

1505

1907

if use_ipv6:

1506

1908

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.

1507

1935

socketserver.TCPServer.__init__(self, server_address,

1508

1936

RequestHandlerClass)

1937

1509

1938

def server_bind(self):

1510

1939

"""This overrides the normal server_bind() function

1511

1940

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

1519

1948

try:

1520

1949

self.socket.setsockopt(socket.SOL_SOCKET,

1521

1950

SO_BINDTODEVICE,

1522

str(self.interface

1523

+ '\0'))

1951

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

1524

1952

except socket.error as error:

1525

if error[0] == errno.EPERM:

1526

logger.error("No permission to"

1527

" bind to interface %s",

1528

self.interface)

1529

elif error[0] == errno.ENOPROTOOPT:

1953

if error.errno == errno.EPERM:

1954

logger.error("No permission to bind to"

1955

" interface %s", self.interface)

1956

elif error.errno == errno.ENOPROTOOPT:

1530

1957

logger.error("SO_BINDTODEVICE not available;"

1531

1958

" cannot bind to interface %s",

1532

1959

self.interface)

1960

elif error.errno == errno.ENODEV:

1961

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

1962

" cannot bind", self.interface)

1533

1963

else:

1534

1964

raise

1535

1965

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

1565

1995

"""

1566

1996

def __init__(self, server_address, RequestHandlerClass,

1567

1997

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

1568

gnutls_priority=None, use_dbus=True):

1998

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

1569

1999

self.enabled = False

1570

2000

self.clients = clients

1571

2001

if self.clients is None:

1572

self.clients = set()

2002

self.clients = {}

1573

2003

self.use_dbus = use_dbus

1574

2004

self.gnutls_priority = gnutls_priority

1575

2005

IPv6_TCPServer.__init__(self, server_address,

1576

2006

RequestHandlerClass,

1577

2007

interface = interface,

1578

use_ipv6 = use_ipv6)

2008

use_ipv6 = use_ipv6,

2009

socketfd = socketfd)

1579

2010

def server_activate(self):

1580

2011

if self.enabled:

1581

2012

return socketserver.TCPServer.server_activate(self)

2013

1582

2014

def enable(self):

1583

2015

self.enabled = True

1584

def add_pipe(self, parent_pipe):

2016

2017

def add_pipe(self, parent_pipe, proc):

1585

2018

# Call "handle_ipc" for both data and EOF events

1586

2019

gobject.io_add_watch(parent_pipe.fileno(),

1587

2020

gobject.IO_IN | gobject.IO_HUP,

1588

2021

functools.partial(self.handle_ipc,

1589

parent_pipe = parent_pipe))

1590

2022

parent_pipe =

2023

parent_pipe,

2024

proc = proc))

2025

1591

2026

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

1592

client_object=None):

1593

condition_names = {

1594

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

1595

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

1596

# blocking).

1597

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

1598

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

1599

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

1600

# broken, usually for pipes and

1601

# sockets).

1602

}

1603

conditions_string = ' | '.join(name

1604

for cond, name in

1605

condition_names.iteritems()

1606

if cond & condition)

1607

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

1608

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

2027

proc = None, client_object=None):

2028

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

2029

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

2030

# Wait for other process to exit

2031

proc.join()

1609

2032

return False

1610

2033

1611

2034

# Read a request from the child

1616

2039

fpr = request[1]

1617

2040

address = request[2]

1618

2041

1619

for c in self.clients:

2042

for c in self.clients.itervalues():

1620

2043

if c.fingerprint == fpr:

1621

2044

client = c

1622

2045

break

1625

2048

"dress: %s", fpr, address)

1626

2049

if self.use_dbus:

1627

2050

# Emit D-Bus signal

1628

mandos_dbus_service.ClientNotFound(fpr, address[0])

2051

mandos_dbus_service.ClientNotFound(fpr,

2052

address[0])

1629

2053

parent_pipe.send(False)

1630

2054

return False

1631

2055

1632

2056

gobject.io_add_watch(parent_pipe.fileno(),

1633

2057

gobject.IO_IN | gobject.IO_HUP,

1634

2058

functools.partial(self.handle_ipc,

1635

parent_pipe = parent_pipe,

1636

client_object = client))

2059

parent_pipe =

2060

parent_pipe,

2061

proc = proc,

2062

client_object =

2063

client))

1637

2064

parent_pipe.send(True)

1638

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

2065

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

2066

# same fileno

1639

2067

return False

1640

2068

if command == 'funcall':

1641

2069

funcname = request[1]

1642

2070

args = request[2]

1643

2071

kwargs = request[3]

1644

2072

1645

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

1646

2073

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

2074

funcname)(*args,

2075

**kwargs)))

2076

1647

2077

if command == 'getattr':

1648

2078

attrname = request[1]

1649

2079

if callable(client_object.__getattribute__(attrname)):

1650

2080

parent_pipe.send(('function',))

1651

2081

else:

1652

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

2082

parent_pipe.send(('data', client_object

2083

.__getattribute__(attrname)))

1653

2084

1654

2085

if command == 'setattr':

1655

2086

attrname = request[1]

1656

2087

value = request[2]

1657

2088

setattr(client_object, attrname, value)

1658

2089

1659

2090

return True

1660

2091

1661

2092

1691

2122

elif suffix == "w":

1692

2123

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

1693

2124

else:

1694

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

2125

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

2126

.format(suffix))

1695

2127

except (ValueError, IndexError) as e:

1696

2128

raise ValueError(*(e.args))

1697

2129

timevalue += delta

1698

2130

return timevalue

1699

2131

1700

2132

1701

def if_nametoindex(interface):

1702

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

1703

1704

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

1705

global if_nametoindex

1706

try:

1707

if_nametoindex = (ctypes.cdll.LoadLibrary

1708

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

1709

.if_nametoindex)

1710

except (OSError, AttributeError):

1711

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

1712

def if_nametoindex(interface):

1713

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

1714

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

1715

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

1716

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1717

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

1718

interface))

1719

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

1720

ifreq[16:20])[0]

1721

return interface_index

1722

return if_nametoindex(interface)

1723

1724

1725

2133

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

1726

2134

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

1727

2135

1735

2143

sys.exit()

1736

2144

if not noclose:

1737

2145

# Close all standard open file descriptors

1738

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

2146

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

1739

2147

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

1740

2148

raise OSError(errno.ENODEV,

1741

"%s not a character device"

1742

% os.path.devnull)

2149

"{0} not a character device"

2150

.format(os.devnull))

1743

2151

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

1744

2152

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

1745

2153

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

1754

2162

1755

2163

parser = argparse.ArgumentParser()

1756

2164

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

1757

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

2165

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

1758

2166

help="show version number and exit")

1759

2167

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

1760

2168

help="Bind to interface IF")

1782

2190

" system bus interface")

1783

2191

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

1784

2192

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

2193

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

2194

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

2195

" state")

2196

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

2197

help="Specify a file descriptor to a network"

2198

" socket to use instead of creating one")

2199

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

2200

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

2201

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

2202

help="Run in foreground")

2203

1785

2204

options = parser.parse_args()

1786

2205

1787

2206

if options.check:

1800

2219

"use_dbus": "True",

1801

2220

"use_ipv6": "True",

1802

2221

"debuglevel": "",

2222

"restore": "True",

2223

"socket": "",

2224

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

2225

"foreground": "False",

1803

2226

}

1804

2227

1805

2228

# Parse config file for server-global settings

1810

2233

# Convert the SafeConfigParser object to a dict

1811

2234

server_settings = server_config.defaults()

1812

2235

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

1813

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

2236

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

1814

2237

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

1815

2238

option)

1816

2239

if server_settings["port"]:

1817

2240

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

1818

2241

"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"])

1819

2251

del server_config

1820

2252

1821

2253

# Override the settings from the config file with command line

1822

2254

# options, if set.

1823

2255

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

1824

2256

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

1825

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

2257

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

2258

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

1826

2259

value = getattr(options, option)

1827

2260

if value is not None:

1828

2261

server_settings[option] = value

1831

2264

for option in server_settings.keys():

1832

2265

if type(server_settings[option]) is str:

1833

2266

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

2267

# Debug implies foreground

2268

if server_settings["debug"]:

2269

server_settings["foreground"] = True

1834

2270

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

1835

2271

1836

2272

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

1840

2276

debuglevel = server_settings["debuglevel"]

1841

2277

use_dbus = server_settings["use_dbus"]

1842

2278

use_ipv6 = server_settings["use_ipv6"]

1843

2279

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

2280

stored_state_file)

2281

foreground = server_settings["foreground"]

2282

2283

if debug:

2284

initlogger(debug, logging.DEBUG)

2285

else:

2286

if not debuglevel:

2287

initlogger(debug)

2288

else:

2289

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

2290

initlogger(debug, level)

2291

1844

2292

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

1845

2293

syslogger.setFormatter(logging.Formatter

1846

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

1847

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

1848

% server_settings["servicename"]))

2294

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

2295

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

2296

.format(server_settings

2297

["servicename"])))

1849

2298

1850

2299

# Parse config file with clients

1851

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

1852

"extended_timeout": "15m",

1853

"interval": "2m",

1854

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

1855

"host": "",

1856

"approval_delay": "0s",

1857

"approval_duration": "1s",

1858

}

1859

client_config = configparser.SafeConfigParser(client_defaults)

2300

client_config = configparser.SafeConfigParser(Client

2301

.client_defaults)

1860

2302

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

1861

2303

"clients.conf"))

1862

2304

1871

2313

use_ipv6=use_ipv6,

1872

2314

gnutls_priority=

1873

2315

server_settings["priority"],

1874

use_dbus=use_dbus)

1875

if not debug:

2316

use_dbus=use_dbus,

2317

socketfd=(server_settings["socket"]

2318

or None))

2319

if not foreground:

1876

2320

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

2321

pidfile = None

1877

2322

try:

1878

2323

pidfile = open(pidfilename, "w")

1879

except IOError:

1880

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

2324

except IOError as e:

2325

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

2326

exc_info=e)

1881

2327

1882

try:

1883

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

1884

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

1885

except KeyError:

2328

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

1886

2329

try:

1887

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

1888

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

2330

uid = pwd.getpwnam(name).pw_uid

2331

gid = pwd.getpwnam(name).pw_gid

2332

break

1889

2333

except KeyError:

1890

try:

1891

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

1892

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

1893

except KeyError:

1894

uid = 65534

1895

gid = 65534

2334

continue

2335

else:

2336

uid = 65534

2337

gid = 65534

1896

2338

try:

1897

2339

os.setgid(gid)

1898

2340

os.setuid(uid)

1899

2341

except OSError as error:

1900

if error[0] != errno.EPERM:

2342

if error.errno != errno.EPERM:

1901

2343

raise error

1902

2344

1903

if not debug and not debuglevel:

1904

syslogger.setLevel(logging.WARNING)

1905

console.setLevel(logging.WARNING)

1906

if debuglevel:

1907

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

1908

syslogger.setLevel(level)

1909

console.setLevel(level)

1910

1911

2345

if debug:

1912

2346

# Enable all possible GnuTLS debugging

1913

2347

1923

2357

.gnutls_global_set_log_function(debug_gnutls))

1924

2358

1925

2359

# Redirect stdin so all checkers get /dev/null

1926

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

2360

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

1927

2361

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

1928

2362

if null > 2:

1929

2363

os.close(null)

1930

else:

1931

# No console logging

1932

logger.removeHandler(console)

1933

2364

1934

2365

# Need to fork before connecting to D-Bus

1935

if not debug:

2366

if not foreground:

1936

2367

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

1937

2368

daemon()

1938

2369

2370

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

2371

# need to inform gobject that threads will be used.

2372

gobject.threads_init()

2373

1939

2374

global main_loop

1940

2375

# From the Avahi example code

1941

DBusGMainLoop(set_as_default=True )

2376

DBusGMainLoop(set_as_default=True)

1942

2377

main_loop = gobject.MainLoop()

1943

2378

bus = dbus.SystemBus()

1944

2379

# End of Avahi example code

1945

2380

if use_dbus:

1946

2381

try:

1947

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

2382

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

1948

2383

bus, do_not_queue=True)

2384

old_bus_name = (dbus.service.BusName

2385

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

2386

do_not_queue=True))

1949

2387

except dbus.exceptions.NameExistsException as e:

1950

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

2388

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

1951

2389

use_dbus = False

1952

2390

server_settings["use_dbus"] = False

1953

2391

tcp_server.use_dbus = False

1954

2392

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1955

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

1956

servicetype = "_mandos._tcp",

1957

protocol = protocol, bus = bus)

2393

service = AvahiServiceToSyslog(name =

2394

server_settings["servicename"],

2395

servicetype = "_mandos._tcp",

2396

protocol = protocol, bus = bus)

1958

2397

if server_settings["interface"]:

1959

2398

service.interface = (if_nametoindex

1960

2399

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

1965

2404

client_class = Client

1966

2405

if use_dbus:

1967

2406

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

1968

def client_config_items(config, section):

1969

special_settings = {

1970

"approved_by_default":

1971

lambda: config.getboolean(section,

1972

"approved_by_default"),

1973

}

1974

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

2407

2408

client_settings = Client.config_parser(client_config)

2409

old_client_settings = {}

2410

clients_data = {}

2411

2412

# Get client data and settings from last running state.

2413

if server_settings["restore"]:

2414

try:

2415

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

2416

clients_data, old_client_settings = (pickle.load

2417

(stored_state))

2418

os.remove(stored_state_path)

2419

except IOError as e:

2420

if e.errno == errno.ENOENT:

2421

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

2422

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

2423

else:

2424

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

2425

exc_info=e)

2426

raise

2427

except EOFError as e:

2428

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

2429

"EOFError:", exc_info=e)

2430

2431

with PGPEngine() as pgp:

2432

for client_name, client in clients_data.iteritems():

2433

# Decide which value to use after restoring saved state.

2434

# We have three different values: Old config file,

2435

# new config file, and saved state.

2436

# New config value takes precedence if it differs from old

2437

# config value, otherwise use saved state.

2438

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

2439

try:

2440

# For each value in new config, check if it

2441

# differs from the old config value (Except for

2442

# the "secret" attribute)

2443

if (name != "secret" and

2444

value != old_client_settings[client_name]

2445

[name]):

2446

client[name] = value

2447

except KeyError:

2448

pass

2449

2450

# Clients who has passed its expire date can still be

2451

# enabled if its last checker was successful. Clients

2452

# whose checker succeeded before we stored its state is

2453

# assumed to have successfully run all checkers during

2454

# downtime.

2455

if client["enabled"]:

2456

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

2457

if not client["last_checked_ok"]:

2458

logger.warning(

2459

"disabling client {0} - Client never "

2460

"performed a successful checker"

2461

.format(client_name))

2462

client["enabled"] = False

2463

elif client["last_checker_status"] != 0:

2464

logger.warning(

2465

"disabling client {0} - Client "

2466

"last checker failed with error code {1}"

2467

.format(client_name,

2468

client["last_checker_status"]))

2469

client["enabled"] = False

2470

else:

2471

client["expires"] = (datetime.datetime

2472

.utcnow()

2473

+ client["timeout"])

2474

logger.debug("Last checker succeeded,"

2475

" keeping {0} enabled"

2476

.format(client_name))

1975

2477

try:

1976

yield (name, special_settings[name]())

1977

except KeyError:

1978

yield (name, value)

1979

1980

tcp_server.clients.update(set(

1981

client_class(name = section,

1982

config= dict(client_config_items(

1983

client_config, section)))

1984

for section in client_config.sections()))

2478

client["secret"] = (

2479

pgp.decrypt(client["encrypted_secret"],

2480

client_settings[client_name]

2481

["secret"]))

2482

except PGPError:

2483

# If decryption fails, we use secret from new settings

2484

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

2485

.format(client_name))

2486

client["secret"] = (

2487

client_settings[client_name]["secret"])

2488

2489

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

2490

for client_name in (set(old_client_settings)

2491

- set(client_settings)):

2492

del clients_data[client_name]

2493

for client_name in (set(client_settings)

2494

- set(old_client_settings)):

2495

clients_data[client_name] = client_settings[client_name]

2496

2497

# Create all client objects

2498

for client_name, client in clients_data.iteritems():

2499

tcp_server.clients[client_name] = client_class(

2500

name = client_name, settings = client)

2501

1985

2502

if not tcp_server.clients:

1986

2503

logger.warning("No clients defined")

1987

1988

if not debug:

1989

try:

1990

with pidfile:

1991

pid = os.getpid()

1992

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

1993

del pidfile

1994

except IOError:

1995

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

1996

pidfilename, pid)

1997

except NameError:

1998

# "pidfile" was never created

1999

pass

2504

2505

if not foreground:

2506

if pidfile is not None:

2507

try:

2508

with pidfile:

2509

pid = os.getpid()

2510

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

2511

except IOError:

2512

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

2513

pidfilename, pid)

2514

del pidfile

2000

2515

del pidfilename

2001

2002

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

2003

2516

2004

2517

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

2005

2518

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

2006

2519

2007

2520

if use_dbus:

2008

class MandosDBusService(dbus.service.Object):

2521

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

2522

"se.bsnet.fukt.Mandos"})

2523

class MandosDBusService(DBusObjectWithProperties):

2009

2524

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

2010

2525

def __init__(self):

2011

2526

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

2012

_interface = "se.bsnet.fukt.Mandos"

2527

_interface = "se.recompile.Mandos"

2528

2529

@dbus_interface_annotations(_interface)

2530

def _foo(self):

2531

return { "org.freedesktop.DBus.Property"

2532

".EmitsChangedSignal":

2533

"false"}

2013

2534

2014

2535

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

2015

2536

def ClientAdded(self, objpath):

2030

2551

def GetAllClients(self):

2031

2552

"D-Bus method"

2032

2553

return dbus.Array(c.dbus_object_path

2033

for c in tcp_server.clients)

2554

for c in

2555

tcp_server.clients.itervalues())

2034

2556

2035

2557

@dbus.service.method(_interface,

2036

2558

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

2038

2560

"D-Bus method"

2039

2561

return dbus.Dictionary(

2040

2562

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

2041

for c in tcp_server.clients),

2563

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

2042

2564

signature="oa{sv}")

2043

2565

2044

2566

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

2045

2567

def RemoveClient(self, object_path):

2046

2568

"D-Bus method"

2047

for c in tcp_server.clients:

2569

for c in tcp_server.clients.itervalues():

2048

2570

if c.dbus_object_path == object_path:

2049

tcp_server.clients.remove(c)

2571

del tcp_server.clients[c.name]

2050

2572

c.remove_from_connection()

2051

2573

# Don't signal anything except ClientRemoved

2052

2574

c.disable(quiet=True)

2063

2585

"Cleanup function; run on exit"

2064

2586

service.cleanup()

2065

2587

2588

multiprocessing.active_children()

2589

if not (tcp_server.clients or client_settings):

2590

return

2591

2592

# Store client before exiting. Secrets are encrypted with key

2593

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

2594

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

2595

clients = {}

2596

with PGPEngine() as pgp:

2597

for client in tcp_server.clients.itervalues():

2598

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

2599

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

2600

key)

2601

client_dict = {}

2602

2603

# A list of attributes that can not be pickled

2604

# + secret.

2605

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

2606

"checker"))

2607

for name, typ in (inspect.getmembers

2608

(dbus.service.Object)):

2609

exclude.add(name)

2610

2611

client_dict["encrypted_secret"] = (client

2612

.encrypted_secret)

2613

for attr in client.client_structure:

2614

if attr not in exclude:

2615

client_dict[attr] = getattr(client, attr)

2616

2617

clients[client.name] = client_dict

2618

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

2619

2620

try:

2621

with (tempfile.NamedTemporaryFile

2622

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

2623

dir=os.path.dirname(stored_state_path),

2624

delete=False)) as stored_state:

2625

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

2626

tempname=stored_state.name

2627

os.rename(tempname, stored_state_path)

2628

except (IOError, OSError) as e:

2629

if not debug:

2630

try:

2631

os.remove(tempname)

2632

except NameError:

2633

pass

2634

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

2635

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

2636

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

2637

else:

2638

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

2639

exc_info=e)

2640

raise e

2641

2642

# Delete all clients, and settings from config

2066

2643

while tcp_server.clients:

2067

client = tcp_server.clients.pop()

2644

name, client = tcp_server.clients.popitem()

2068

2645

if use_dbus:

2069

2646

client.remove_from_connection()

2070

client.disable_hook = None

2071

2647

# Don't signal anything except ClientRemoved

2072

2648

client.disable(quiet=True)

2073

2649

if use_dbus:

2074

2650

# Emit D-Bus signal

2075

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2651

mandos_dbus_service.ClientRemoved(client

2652

.dbus_object_path,

2076

2653

client.name)

2654

client_settings.clear()

2077

2655

2078

2656

atexit.register(cleanup)

2079

2657

2080

for client in tcp_server.clients:

2658

for client in tcp_server.clients.itervalues():

2081

2659

if use_dbus:

2082

2660

# Emit D-Bus signal

2083

2661

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2084

client.enable()

2662

# Need to initiate checking of clients

2663

if client.enabled:

2664

client.init_checker()

2085

2665

2086

2666

tcp_server.enable()

2087

2667

tcp_server.server_activate()

2090

2670

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

2091

2671

if use_ipv6:

2092

2672

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

2093

" flowinfo %d, scope_id %d"

2094

% tcp_server.socket.getsockname())

2673

" flowinfo %d, scope_id %d",

2674

*tcp_server.socket.getsockname())

2095

2675

else: # IPv4

2096

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

2097

% tcp_server.socket.getsockname())

2676

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

2677

*tcp_server.socket.getsockname())

2098

2678

2099

2679

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

2100

2680

2103

2683

try:

2104

2684

service.activate()

2105

2685

except dbus.exceptions.DBusException as error:

2106

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

2686

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

2107

2687

cleanup()

2108

2688

sys.exit(1)

2109

2689

# End of Avahi example code

2116

2696

logger.debug("Starting main loop")

2117

2697

main_loop.run()

2118

2698

except AvahiError as error:

2119

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

2699

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

2120

2700

cleanup()

2121

2701

sys.exit(1)

2122

2702

except KeyboardInterrupt: