/mandos/trunk : revision 604

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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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def _timedelta_to_milliseconds(td):

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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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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 _timedelta_to_milliseconds(self.timeout)

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return timedelta_to_milliseconds(self.timeout)

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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return _timedelta_to_milliseconds(self.extended_timeout)

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return timedelta_to_milliseconds(self.extended_timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return _timedelta_to_milliseconds(self.interval)

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return timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

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return _timedelta_to_milliseconds(self.approval_delay)

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

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

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

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attribute."""

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return timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

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def config_parser(config):

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

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

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with exceptions for any special settings as defined above.

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

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value given the same arguments.

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"""

483

settings = {}

484

for client_name in config.sections():

485

section = dict(config.items(client_name))

486

client = settings[client_name] = {}

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

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# Reformat values from string types to Python types

490

client["approved_by_default"] = config.getboolean(

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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"])),

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"rb") as secfile:

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

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else:

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

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.format(section))

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

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client["extended_timeout"] = string_to_delta(

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section["extended_timeout"])

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

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client["approval_delay"] = string_to_delta(

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section["approval_delay"])

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client["approval_duration"] = string_to_delta(

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section["approval_duration"])

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

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client["last_approval_request"] = None

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client["last_checked_ok"] = None

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client["last_checker_status"] = -2

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return settings

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

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523

self.name = name

337

if config is None:

338

config = {}

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# adding all client settings

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for setting, value in settings.iteritems():

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setattr(self, setting, value)

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if self.enabled:

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()

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+ self.timeout)

534

else:

535

self.last_enabled = None

536

self.expires = None

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

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# Uppercase and remove spaces from fingerprint for later

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# comparison purposes with return value from the fingerprint()

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# function

343

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

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.replace(" ", ""))

345

542

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

346

if "secret" in config:

347

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

348

elif "secfile" in config:

349

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

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(config["secfile"])),

351

"rb") as secfile:

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self.secret = secfile.read()

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else:

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

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% self.name)

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

357

self.created = datetime.datetime.utcnow()

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self.enabled = False

359

self.last_approval_request = None

360

self.last_enabled = None

361

self.last_checked_ok = None

362

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

363

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

364

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

365

self.disable_hook = disable_hook

543

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

544

datetime.datetime.utcnow())

545

546

# attributes specific for this server instance

366

547

self.checker = None

367

548

self.checker_initiator_tag = None

368

549

self.disable_initiator_tag = None

369

self.expires = None

370

550

self.checker_callback_tag = None

371

self.checker_command = config["checker"]

372

551

self.current_checker_command = None

373

self.last_connect = None

374

self._approved = None

375

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

376

True)

552

self.approved = None

377

553

self.approvals_pending = 0

378

self.approval_delay = string_to_delta(

379

config["approval_delay"])

380

self.approval_duration = string_to_delta(

381

config["approval_duration"])

382

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)

383

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569

# Send notice to process children that client state has changed

384

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def send_changedstate(self):

385

self.changedstate.acquire()

386

self.changedstate.notify_all()

387

self.changedstate.release()

388

571

with self.changedstate:

572

self.changedstate.notify_all()

573

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574

def enable(self):

390

575

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

391

576

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

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# Already enabled

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return

579

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

580

self.enabled = True

581

self.last_enabled = datetime.datetime.utcnow()

582

self.init_checker()

394

583

self.send_changedstate()

584

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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):

395

609

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

396

610

# and every interval from then on.

611

if self.checker_initiator_tag is not None:

612

gobject.source_remove(self.checker_initiator_tag)

397

613

self.checker_initiator_tag = (gobject.timeout_add

398

614

(self.interval_milliseconds(),

399

615

self.start_checker))

400

616

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

401

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

617

if self.disable_initiator_tag is not None:

618

gobject.source_remove(self.disable_initiator_tag)

402

619

self.disable_initiator_tag = (gobject.timeout_add

403

620

(self.timeout_milliseconds(),

404

621

self.disable))

405

self.enabled = True

406

self.last_enabled = datetime.datetime.utcnow()

407

622

# Also start a new checker *right now*.

408

623

self.start_checker()

409

624

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def disable(self, quiet=True):

411

"""Disable this client."""

412

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

413

return False

414

if not quiet:

415

self.send_changedstate()

416

if not quiet:

417

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

418

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

419

gobject.source_remove(self.disable_initiator_tag)

420

self.disable_initiator_tag = None

421

self.expires = None

422

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

423

gobject.source_remove(self.checker_initiator_tag)

424

self.checker_initiator_tag = None

425

self.stop_checker()

426

if self.disable_hook:

427

self.disable_hook(self)

428

self.enabled = False

429

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

430

return False

431

432

def __del__(self):

433

self.disable_hook = None

434

self.disable()

435

436

625

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

437

626

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

438

627

self.checker_callback_tag = None

439

628

self.checker = None

440

629

if os.WIFEXITED(condition):

441

exitstatus = os.WEXITSTATUS(condition)

442

if exitstatus == 0:

630

self.last_checker_status = os.WEXITSTATUS(condition)

631

if self.last_checker_status == 0:

443

632

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

444

633

vars(self))

445

634

self.checked_ok()

447

636

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

448

637

vars(self))

449

638

else:

639

self.last_checker_status = -1

450

640

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

451

641

vars(self))

452

642

453

def checked_ok(self, timeout=None):

454

"""Bump up the timeout for this client.

455

456

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

457

alive and well.

458

"""

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."""

459

651

if timeout is None:

460

652

timeout = self.timeout

461

self.last_checked_ok = datetime.datetime.utcnow()

462

gobject.source_remove(self.disable_initiator_tag)

463

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

464

self.disable_initiator_tag = (gobject.timeout_add

465

(_timedelta_to_milliseconds(timeout),

466

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

467

661

468

662

def need_approval(self):

469

663

self.last_approval_request = datetime.datetime.utcnow()

474

668

If a checker already exists, leave it running and do

475

669

nothing."""

476

670

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

477

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

478

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

479

# client would inevitably timeout, since no checker would get

480

# 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

481

675

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

482

676

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

483

677

# should be.

497

691

self.current_checker_command)

498

692

# Start a new checker if needed

499

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)

500

699

try:

501

# In case checker_command has exactly one % operator

502

command = self.checker_command % self.host

503

except TypeError:

504

# Escape attributes for the shell

505

escaped_attrs = dict(

506

(attr,

507

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

508

errors=

509

'replace')))

510

for attr in

511

self.runtime_expansions)

512

513

try:

514

command = self.checker_command % escaped_attrs

515

except TypeError as error:

516

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

517

' %s', self.checker_command, error)

518

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

519

705

self.current_checker_command = command

520

706

try:

521

707

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

527

713

self.checker = subprocess.Popen(command,

528

714

close_fds=True,

529

715

shell=True, cwd="/")

530

self.checker_callback_tag = (gobject.child_watch_add

531

(self.checker.pid,

532

self.checker_callback,

533

data=command))

534

# The checker may have completed before the gobject

535

# watch was added. Check for this.

536

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

537

if pid:

538

gobject.source_remove(self.checker_callback_tag)

539

self.checker_callback(pid, status, command)

540

716

except OSError as error:

541

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

542

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)

543

729

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

544

730

return True

545

731

552

738

return

553

739

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

554

740

try:

555

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

741

self.checker.terminate()

556

742

#time.sleep(0.5)

557

743

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

558

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

744

# self.checker.kill()

559

745

except OSError as error:

560

746

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

561

747

raise

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

"""

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",

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

754

def datetime_to_dbus (dt, variant_level=0):

1019

def datetime_to_dbus(dt, variant_level=0):

755

1020

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

756

1021

if dt is None:

757

1022

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

759

1024

variant_level=variant_level)

760

1025

761

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"})

762

1198

class ClientDBus(Client, DBusObjectWithProperties):

763

1199

"""A Client class using D-Bus

764

1200

773

1209

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

774

1210

775

1211

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

776

self._approvals_pending = 0

777

1212

self.bus = bus

778

1213

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

779

1214

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

785

1220

("/clients/" + client_object_name))

786

1221

DBusObjectWithProperties.__init__(self, self.bus,

787

1222

self.dbus_object_path)

788

1223

789

1224

def notifychangeproperty(transform_func,

790

1225

dbus_name, type_func=lambda x: x,

791

1226

variant_level=1):

792

""" Modify a variable so that its a property that announce its

793

changes to DBus.

794

transform_fun: Function that takes a value and transform it to

795

DBus type.

796

dbus_name: DBus name of the variable

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

797

1233

type_func: Function that transform the value before sending it

798

to DBus

799

variant_level: DBus variant level. default: 1

1234

to the D-Bus. Default: no transform

1235

variant_level: D-Bus variant level. Default: 1

800

1236

"""

801

real_value = [None,]

1237

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

802

1238

def setter(self, value):

803

old_value = real_value[0]

804

real_value[0] = value

805

1239

if hasattr(self, "dbus_object_path"):

806

if type_func(old_value) != type_func(real_value[0]):

807

dbus_value = transform_func(type_func(real_value[0]),

808

variant_level)

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)

809

1246

self.PropertyChanged(dbus.String(dbus_name),

810

1247

dbus_value)

1248

setattr(self, attrname, value)

811

1249

812

return property(lambda self: real_value[0], setter)

813

1250

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

814

1251

815

1252

expires = notifychangeproperty(datetime_to_dbus, "Expires")

816

1253

approvals_pending = notifychangeproperty(dbus.Boolean,

820

1257

last_enabled = notifychangeproperty(datetime_to_dbus,

821

1258

"LastEnabled")

822

1259

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

823

type_func = lambda checker: checker is not None)

1260

type_func = lambda checker:

1261

checker is not None)

824

1262

last_checked_ok = notifychangeproperty(datetime_to_dbus,

825

1263

"LastCheckedOK")

826

last_approval_request = notifychangeproperty(datetime_to_dbus,

827

"LastApprovalRequest")

1264

last_checker_status = notifychangeproperty(dbus.Int16,

1265

"LastCheckerStatus")

1266

last_approval_request = notifychangeproperty(

1267

datetime_to_dbus, "LastApprovalRequest")

828

1268

approved_by_default = notifychangeproperty(dbus.Boolean,

829

1269

"ApprovedByDefault")

830

approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",

831

type_func = _timedelta_to_milliseconds)

832

approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",

833

type_func = _timedelta_to_milliseconds)

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)

834

1277

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

835

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

836

type_func = _timedelta_to_milliseconds)

837

extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",

838

type_func = _timedelta_to_milliseconds)

839

interval = notifychangeproperty(dbus.UInt16, "Interval",

840

type_func = _timedelta_to_milliseconds)

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)

841

1288

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

842

1289

843

1290

del notifychangeproperty

885

1332

return r

886

1333

887

1334

def _reset_approved(self):

888

self._approved = None

1335

self.approved = None

889

1336

return False

890

1337

891

1338

def approve(self, value=True):

892

self.send_changedstate()

893

self._approved = value

894

gobject.timeout_add(_timedelta_to_milliseconds

1339

self.approved = value

1340

gobject.timeout_add(timedelta_to_milliseconds

895

1341

(self.approval_duration),

896

1342

self._reset_approved)

897

1343

self.send_changedstate()

898

1344

899

1345

## D-Bus methods, signals & properties

900

_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"}

901

1354

902

1355

## Signals

903

1356

1003

1456

access="readwrite")

1004

1457

def ApprovalDuration_dbus_property(self, value=None):

1005

1458

if value is None: # get

1006

return dbus.UInt64(_timedelta_to_milliseconds(

1459

return dbus.UInt64(timedelta_to_milliseconds(

1007

1460

self.approval_duration))

1008

1461

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

1009

1462

1023

1476

def Host_dbus_property(self, value=None):

1024

1477

if value is None: # get

1025

1478

return dbus.String(self.host)

1026

self.host = value

1479

self.host = unicode(value)

1027

1480

1028

1481

# Created - property

1029

1482

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

1030

1483

def Created_dbus_property(self):

1031

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

1484

return datetime_to_dbus(self.created)

1032

1485

1033

1486

# LastEnabled - property

1034

1487

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

1055

1508

return

1056

1509

return datetime_to_dbus(self.last_checked_ok)

1057

1510

1511

# LastCheckerStatus - property

1512

@dbus_service_property(_interface, signature="n",

1513

access="read")

1514

def LastCheckerStatus_dbus_property(self):

1515

return dbus.Int16(self.last_checker_status)

1516

1058

1517

# Expires - property

1059

1518

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

1060

1519

def Expires_dbus_property(self):

1071

1530

def Timeout_dbus_property(self, value=None):

1072

1531

if value is None: # get

1073

1532

return dbus.UInt64(self.timeout_milliseconds())

1533

old_timeout = self.timeout

1074

1534

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

1075

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

1076

return

1077

# Reschedule timeout

1078

gobject.source_remove(self.disable_initiator_tag)

1079

self.disable_initiator_tag = None

1080

self.expires = None

1081

time_to_die = (self.

1082

_timedelta_to_milliseconds((self

1083

.last_checked_ok

1084

+ self.timeout)

1085

- datetime.datetime

1086

.utcnow()))

1087

if time_to_die <= 0:

1088

# The timeout has passed

1089

self.disable()

1090

else:

1091

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

1092

+ datetime.timedelta(milliseconds = time_to_die))

1093

self.disable_initiator_tag = (gobject.timeout_add

1094

(time_to_die, self.disable))

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))

1095

1551

1096

1552

# ExtendedTimeout - property

1097

1553

@dbus_service_property(_interface, signature="t",

1110

1566

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

1111

1567

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

1112

1568

return

1113

# Reschedule checker run

1114

gobject.source_remove(self.checker_initiator_tag)

1115

self.checker_initiator_tag = (gobject.timeout_add

1116

(value, self.start_checker))

1117

self.start_checker() # Start one now, too

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

1118

1575

1119

1576

# Checker - property

1120

1577

@dbus_service_property(_interface, signature="s",

1122

1579

def Checker_dbus_property(self, value=None):

1123

1580

if value is None: # get

1124

1581

return dbus.String(self.checker_command)

1125

self.checker_command = value

1582

self.checker_command = unicode(value)

1126

1583

1127

1584

# CheckerRunning - property

1128

1585

@dbus_service_property(_interface, signature="b",

1157

1614

raise KeyError()

1158

1615

1159

1616

def __getattribute__(self, name):

1160

if(name == '_pipe'):

1617

if name == '_pipe':

1161

1618

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

1162

1619

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

1163

1620

data = self._pipe.recv()

1170

1627

return func

1171

1628

1172

1629

def __setattr__(self, name, value):

1173

if(name == '_pipe'):

1630

if name == '_pipe':

1174

1631

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

1175

1632

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

1176

1633

1259

1716

client.name)

1260

1717

if self.server.use_dbus:

1261

1718

# Emit D-Bus signal

1262

client.Rejected("Disabled")

1719

client.Rejected("Disabled")

1263

1720

return

1264

1721

1265

if client._approved or not client.approval_delay:

1722

if client.approved or not client.approval_delay:

1266

1723

#We are approved or approval is disabled

1267

1724

break

1268

elif client._approved is None:

1725

elif client.approved is None:

1269

1726

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

1270

1727

client.name)

1271

1728

if self.server.use_dbus:

1282

1739

return

1283

1740

1284

1741

#wait until timeout or approved

1285

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

1286

1742

time = datetime.datetime.now()

1287

1743

client.changedstate.acquire()

1288

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

1744

client.changedstate.wait(

1745

float(timedelta_to_milliseconds(delay)

1746

/ 1000))

1289

1747

client.changedstate.release()

1290

1748

time2 = datetime.datetime.now()

1291

1749

if (time2 - time) >= delay:

1307

1765

try:

1308

1766

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

1309

1767

except gnutls.errors.GNUTLSError as error:

1310

logger.warning("gnutls send failed")

1768

logger.warning("gnutls send failed",

1769

exc_info=error)

1311

1770

return

1312

1771

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

1313

1772

sent, len(client.secret)

1315

1774

sent_size += sent

1316

1775

1317

1776

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

1318

# bump the timeout as if seen

1319

client.checked_ok(client.extended_timeout)

1777

# bump the timeout using extended_timeout

1778

client.bump_timeout(client.extended_timeout)

1320

1779

if self.server.use_dbus:

1321

1780

# Emit D-Bus signal

1322

1781

client.GotSecret()

1327

1786

try:

1328

1787

session.bye()

1329

1788

except gnutls.errors.GNUTLSError as error:

1330

logger.warning("GnuTLS bye failed")

1789

logger.warning("GnuTLS bye failed",

1790

exc_info=error)

1331

1791

1332

1792

@staticmethod

1333

1793

def peer_certificate(session):

1389

1849

# Convert the buffer to a Python bytestring

1390

1850

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

1391

1851

# Convert the bytestring to hexadecimal notation

1392

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

1852

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

1393

1853

return hex_fpr

1394

1854

1395

1855

1398

1858

def sub_process_main(self, request, address):

1399

1859

try:

1400

1860

self.finish_request(request, address)

1401

except:

1861

except Exception:

1402

1862

self.handle_error(request, address)

1403

1863

self.close_request(request)

1404

1864

1405

1865

def process_request(self, request, address):

1406

1866

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

1407

multiprocessing.Process(target = self.sub_process_main,

1408

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

1867

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

1868

args = (request, address))

1869

proc.start()

1870

return proc

1409

1871

1410

1872

1411

1873

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1417

1879

"""

1418

1880

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1419

1881

1420

super(MultiprocessingMixInWithPipe,

1421

self).process_request(request, client_address)

1882

proc = MultiprocessingMixIn.process_request(self, request,

1883

client_address)

1422

1884

self.child_pipe.close()

1423

self.add_pipe(parent_pipe)

1885

self.add_pipe(parent_pipe, proc)

1424

1886

1425

def add_pipe(self, parent_pipe):

1887

def add_pipe(self, parent_pipe, proc):

1426

1888

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

1427

1889

raise NotImplementedError

1428

1890

1437

1899

use_ipv6: Boolean; to use IPv6 or not

1438

1900

"""

1439

1901

def __init__(self, server_address, RequestHandlerClass,

1440

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

"""

1441

1906

self.interface = interface

1442

1907

if use_ipv6:

1443

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.

1444

1935

socketserver.TCPServer.__init__(self, server_address,

1445

1936

RequestHandlerClass)

1937

1446

1938

def server_bind(self):

1447

1939

"""This overrides the normal server_bind() function

1448

1940

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

1459

1951

str(self.interface

1460

1952

+ '\0'))

1461

1953

except socket.error as error:

1462

if error[0] == errno.EPERM:

1954

if error.errno == errno.EPERM:

1463

1955

logger.error("No permission to"

1464

1956

" bind to interface %s",

1465

1957

self.interface)

1466

elif error[0] == errno.ENOPROTOOPT:

1958

elif error.errno == errno.ENOPROTOOPT:

1467

1959

logger.error("SO_BINDTODEVICE not available;"

1468

1960

" cannot bind to interface %s",

1469

1961

self.interface)

1962

elif error.errno == errno.ENODEV:

1963

logger.error("Interface %s does not"

1964

" exist, cannot bind",

1965

self.interface)

1470

1966

else:

1471

1967

raise

1472

1968

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

1502

1998

"""

1503

1999

def __init__(self, server_address, RequestHandlerClass,

1504

2000

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

1505

gnutls_priority=None, use_dbus=True):

2001

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

1506

2002

self.enabled = False

1507

2003

self.clients = clients

1508

2004

if self.clients is None:

1509

self.clients = set()

2005

self.clients = {}

1510

2006

self.use_dbus = use_dbus

1511

2007

self.gnutls_priority = gnutls_priority

1512

2008

IPv6_TCPServer.__init__(self, server_address,

1513

2009

RequestHandlerClass,

1514

2010

interface = interface,

1515

use_ipv6 = use_ipv6)

2011

use_ipv6 = use_ipv6,

2012

socketfd = socketfd)

1516

2013

def server_activate(self):

1517

2014

if self.enabled:

1518

2015

return socketserver.TCPServer.server_activate(self)

2016

1519

2017

def enable(self):

1520

2018

self.enabled = True

1521

def add_pipe(self, parent_pipe):

2019

2020

def add_pipe(self, parent_pipe, proc):

1522

2021

# Call "handle_ipc" for both data and EOF events

1523

2022

gobject.io_add_watch(parent_pipe.fileno(),

1524

2023

gobject.IO_IN | gobject.IO_HUP,

1525

2024

functools.partial(self.handle_ipc,

1526

parent_pipe = parent_pipe))

1527

2025

parent_pipe =

2026

parent_pipe,

2027

proc = proc))

2028

1528

2029

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

1529

client_object=None):

1530

condition_names = {

1531

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

1532

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

1533

# blocking).

1534

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

1535

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

1536

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

1537

# broken, usually for pipes and

1538

# sockets).

1539

}

1540

conditions_string = ' | '.join(name

1541

for cond, name in

1542

condition_names.iteritems()

1543

if cond & condition)

1544

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

1545

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

2030

proc = None, client_object=None):

2031

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

2032

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

2033

# Wait for other process to exit

2034

proc.join()

1546

2035

return False

1547

2036

1548

2037

# Read a request from the child

1553

2042

fpr = request[1]

1554

2043

address = request[2]

1555

2044

1556

for c in self.clients:

2045

for c in self.clients.itervalues():

1557

2046

if c.fingerprint == fpr:

1558

2047

client = c

1559

2048

break

1562

2051

"dress: %s", fpr, address)

1563

2052

if self.use_dbus:

1564

2053

# Emit D-Bus signal

1565

mandos_dbus_service.ClientNotFound(fpr, address[0])

2054

mandos_dbus_service.ClientNotFound(fpr,

2055

address[0])

1566

2056

parent_pipe.send(False)

1567

2057

return False

1568

2058

1569

2059

gobject.io_add_watch(parent_pipe.fileno(),

1570

2060

gobject.IO_IN | gobject.IO_HUP,

1571

2061

functools.partial(self.handle_ipc,

1572

parent_pipe = parent_pipe,

1573

client_object = client))

2062

parent_pipe =

2063

parent_pipe,

2064

proc = proc,

2065

client_object =

2066

client))

1574

2067

parent_pipe.send(True)

1575

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

2068

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

2069

# same fileno

1576

2070

return False

1577

2071

if command == 'funcall':

1578

2072

funcname = request[1]

1579

2073

args = request[2]

1580

2074

kwargs = request[3]

1581

2075

1582

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

2076

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

2077

funcname)(*args,

2078

**kwargs)))

1583

2079

1584

2080

if command == 'getattr':

1585

2081

attrname = request[1]

1586

2082

if callable(client_object.__getattribute__(attrname)):

1587

2083

parent_pipe.send(('function',))

1588

2084

else:

1589

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

2085

parent_pipe.send(('data', client_object

2086

.__getattribute__(attrname)))

1590

2087

1591

2088

if command == 'setattr':

1592

2089

attrname = request[1]

1628

2125

elif suffix == "w":

1629

2126

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

1630

2127

else:

1631

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

2128

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

2129

.format(suffix))

1632

2130

except (ValueError, IndexError) as e:

1633

2131

raise ValueError(*(e.args))

1634

2132

timevalue += delta

1635

2133

return timevalue

1636

2134

1637

2135

1638

def if_nametoindex(interface):

1639

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

1640

1641

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

1642

global if_nametoindex

1643

try:

1644

if_nametoindex = (ctypes.cdll.LoadLibrary

1645

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

1646

.if_nametoindex)

1647

except (OSError, AttributeError):

1648

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

1649

def if_nametoindex(interface):

1650

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

1651

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

1652

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

1653

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1654

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

1655

interface))

1656

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

1657

ifreq[16:20])[0]

1658

return interface_index

1659

return if_nametoindex(interface)

1660

1661

1662

2136

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

1663

2137

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

1664

2138

1672

2146

sys.exit()

1673

2147

if not noclose:

1674

2148

# Close all standard open file descriptors

1675

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

2149

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

1676

2150

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

1677

2151

raise OSError(errno.ENODEV,

1678

"%s not a character device"

1679

% os.path.devnull)

2152

"{0} not a character device"

2153

.format(os.devnull))

1680

2154

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

1681

2155

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

1682

2156

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

1691

2165

1692

2166

parser = argparse.ArgumentParser()

1693

2167

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

1694

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

2168

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

1695

2169

help="show version number and exit")

1696

2170

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

1697

2171

help="Bind to interface IF")

1719

2193

" system bus interface")

1720

2194

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

1721

2195

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

2196

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

2197

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

2198

" state")

2199

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

2200

help="Specify a file descriptor to a network"

2201

" socket to use instead of creating one")

2202

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

2203

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

2204

1722

2205

options = parser.parse_args()

1723

2206

1724

2207

if options.check:

1737

2220

"use_dbus": "True",

1738

2221

"use_ipv6": "True",

1739

2222

"debuglevel": "",

2223

"restore": "True",

2224

"socket": "",

2225

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

1740

2226

}

1741

2227

1742

2228

# Parse config file for server-global settings

1753

2239

if server_settings["port"]:

1754

2240

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

1755

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"])

1756

2251

del server_config

1757

2252

1758

2253

# Override the settings from the config file with command line

1759

2254

# options, if set.

1760

2255

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

1761

2256

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

1762

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

2257

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

2258

"statedir", "socket"):

1763

2259

value = getattr(options, option)

1764

2260

if value is not None:

1765

2261

server_settings[option] = value

1777

2273

debuglevel = server_settings["debuglevel"]

1778

2274

use_dbus = server_settings["use_dbus"]

1779

2275

use_ipv6 = server_settings["use_ipv6"]

2276

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

2277

stored_state_file)

2278

2279

if debug:

2280

initlogger(debug, logging.DEBUG)

2281

else:

2282

if not debuglevel:

2283

initlogger(debug)

2284

else:

2285

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

2286

initlogger(debug, level)

1780

2287

1781

2288

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

1782

2289

syslogger.setFormatter(logging.Formatter

1783

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

1784

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

1785

% server_settings["servicename"]))

2290

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

2291

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

2292

.format(server_settings

2293

["servicename"])))

1786

2294

1787

2295

# Parse config file with clients

1788

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

1789

"extended_timeout": "15m",

1790

"interval": "2m",

1791

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

1792

"host": "",

1793

"approval_delay": "0s",

1794

"approval_duration": "1s",

1795

}

1796

client_config = configparser.SafeConfigParser(client_defaults)

2296

client_config = configparser.SafeConfigParser(Client

2297

.client_defaults)

1797

2298

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

1798

2299

"clients.conf"))

1799

2300

1808

2309

use_ipv6=use_ipv6,

1809

2310

gnutls_priority=

1810

2311

server_settings["priority"],

1811

use_dbus=use_dbus)

2312

use_dbus=use_dbus,

2313

socketfd=(server_settings["socket"]

2314

or None))

1812

2315

if not debug:

1813

2316

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

1814

2317

try:

1815

2318

pidfile = open(pidfilename, "w")

1816

except IOError:

1817

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

2319

except IOError as e:

2320

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

2321

exc_info=e)

1818

2322

1819

try:

1820

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

1821

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

1822

except KeyError:

2323

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

1823

2324

try:

1824

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

1825

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

2325

uid = pwd.getpwnam(name).pw_uid

2326

gid = pwd.getpwnam(name).pw_gid

2327

break

1826

2328

except KeyError:

1827

try:

1828

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

1829

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

1830

except KeyError:

1831

uid = 65534

1832

gid = 65534

2329

continue

2330

else:

2331

uid = 65534

2332

gid = 65534

1833

2333

try:

1834

2334

os.setgid(gid)

1835

2335

os.setuid(uid)

1836

2336

except OSError as error:

1837

if error[0] != errno.EPERM:

2337

if error.errno != errno.EPERM:

1838

2338

raise error

1839

2339

1840

if not debug and not debuglevel:

1841

syslogger.setLevel(logging.WARNING)

1842

console.setLevel(logging.WARNING)

1843

if debuglevel:

1844

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

1845

syslogger.setLevel(level)

1846

console.setLevel(level)

1847

1848

2340

if debug:

1849

2341

# Enable all possible GnuTLS debugging

1850

2342

1860

2352

.gnutls_global_set_log_function(debug_gnutls))

1861

2353

1862

2354

# Redirect stdin so all checkers get /dev/null

1863

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

2355

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

1864

2356

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

1865

2357

if null > 2:

1866

2358

os.close(null)

1867

else:

1868

# No console logging

1869

logger.removeHandler(console)

1870

2359

1871

2360

# Need to fork before connecting to D-Bus

1872

2361

if not debug:

1873

2362

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

1874

2363

daemon()

1875

2364

2365

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

2366

# need to inform gobject that threads will be used.

2367

gobject.threads_init()

2368

1876

2369

global main_loop

1877

2370

# From the Avahi example code

1878

DBusGMainLoop(set_as_default=True )

2371

DBusGMainLoop(set_as_default=True)

1879

2372

main_loop = gobject.MainLoop()

1880

2373

bus = dbus.SystemBus()

1881

2374

# End of Avahi example code

1882

2375

if use_dbus:

1883

2376

try:

1884

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

2377

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

1885

2378

bus, do_not_queue=True)

2379

old_bus_name = (dbus.service.BusName

2380

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

2381

do_not_queue=True))

1886

2382

except dbus.exceptions.NameExistsException as e:

1887

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

2383

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

1888

2384

use_dbus = False

1889

2385

server_settings["use_dbus"] = False

1890

2386

tcp_server.use_dbus = False

1891

2387

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1892

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

1893

servicetype = "_mandos._tcp",

1894

protocol = protocol, bus = bus)

2388

service = AvahiServiceToSyslog(name =

2389

server_settings["servicename"],

2390

servicetype = "_mandos._tcp",

2391

protocol = protocol, bus = bus)

1895

2392

if server_settings["interface"]:

1896

2393

service.interface = (if_nametoindex

1897

2394

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

1902

2399

client_class = Client

1903

2400

if use_dbus:

1904

2401

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

1905

def client_config_items(config, section):

1906

special_settings = {

1907

"approved_by_default":

1908

lambda: config.getboolean(section,

1909

"approved_by_default"),

1910

}

1911

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

2402

2403

client_settings = Client.config_parser(client_config)

2404

old_client_settings = {}

2405

clients_data = {}

2406

2407

# Get client data and settings from last running state.

2408

if server_settings["restore"]:

2409

try:

2410

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

2411

clients_data, old_client_settings = (pickle.load

2412

(stored_state))

2413

os.remove(stored_state_path)

2414

except IOError as e:

2415

if e.errno == errno.ENOENT:

2416

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

2417

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

2418

else:

2419

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

2420

exc_info=e)

2421

raise

2422

except EOFError as e:

2423

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

2424

"EOFError:", exc_info=e)

2425

2426

with PGPEngine() as pgp:

2427

for client_name, client in clients_data.iteritems():

2428

# Decide which value to use after restoring saved state.

2429

# We have three different values: Old config file,

2430

# new config file, and saved state.

2431

# New config value takes precedence if it differs from old

2432

# config value, otherwise use saved state.

2433

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

2434

try:

2435

# For each value in new config, check if it

2436

# differs from the old config value (Except for

2437

# the "secret" attribute)

2438

if (name != "secret" and

2439

value != old_client_settings[client_name]

2440

[name]):

2441

client[name] = value

2442

except KeyError:

2443

pass

2444

2445

# Clients who has passed its expire date can still be

2446

# enabled if its last checker was successful. Clients

2447

# whose checker succeeded before we stored its state is

2448

# assumed to have successfully run all checkers during

2449

# downtime.

2450

if client["enabled"]:

2451

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

2452

if not client["last_checked_ok"]:

2453

logger.warning(

2454

"disabling client {0} - Client never "

2455

"performed a successful checker"

2456

.format(client_name))

2457

client["enabled"] = False

2458

elif client["last_checker_status"] != 0:

2459

logger.warning(

2460

"disabling client {0} - Client "

2461

"last checker failed with error code {1}"

2462

.format(client_name,

2463

client["last_checker_status"]))

2464

client["enabled"] = False

2465

else:

2466

client["expires"] = (datetime.datetime

2467

.utcnow()

2468

+ client["timeout"])

2469

logger.debug("Last checker succeeded,"

2470

" keeping {0} enabled"

2471

.format(client_name))

1912

2472

try:

1913

yield (name, special_settings[name]())

1914

except KeyError:

1915

yield (name, value)

1916

1917

tcp_server.clients.update(set(

1918

client_class(name = section,

1919

config= dict(client_config_items(

1920

client_config, section)))

1921

for section in client_config.sections()))

2473

client["secret"] = (

2474

pgp.decrypt(client["encrypted_secret"],

2475

client_settings[client_name]

2476

["secret"]))

2477

except PGPError:

2478

# If decryption fails, we use secret from new settings

2479

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

2480

.format(client_name))

2481

client["secret"] = (

2482

client_settings[client_name]["secret"])

2483

2484

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

2485

for client_name in (set(old_client_settings)

2486

- set(client_settings)):

2487

del clients_data[client_name]

2488

for client_name in (set(client_settings)

2489

- set(old_client_settings)):

2490

clients_data[client_name] = client_settings[client_name]

2491

2492

# Create all client objects

2493

for client_name, client in clients_data.iteritems():

2494

tcp_server.clients[client_name] = client_class(

2495

name = client_name, settings = client)

2496

1922

2497

if not tcp_server.clients:

1923

2498

logger.warning("No clients defined")

1924

2499

1925

2500

if not debug:

1926

2501

try:

1927

2502

with pidfile:

1935

2510

# "pidfile" was never created

1936

2511

pass

1937

2512

del pidfilename

1938

1939

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

1940

2513

1941

2514

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

1942

2515

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

1943

2516

1944

2517

if use_dbus:

1945

class MandosDBusService(dbus.service.Object):

2518

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

2519

"se.bsnet.fukt.Mandos"})

2520

class MandosDBusService(DBusObjectWithProperties):

1946

2521

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

1947

2522

def __init__(self):

1948

2523

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

1949

_interface = "se.bsnet.fukt.Mandos"

2524

_interface = "se.recompile.Mandos"

2525

2526

@dbus_interface_annotations(_interface)

2527

def _foo(self):

2528

return { "org.freedesktop.DBus.Property"

2529

".EmitsChangedSignal":

2530

"false"}

1950

2531

1951

2532

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

1952

2533

def ClientAdded(self, objpath):

1967

2548

def GetAllClients(self):

1968

2549

"D-Bus method"

1969

2550

return dbus.Array(c.dbus_object_path

1970

for c in tcp_server.clients)

2551

for c in

2552

tcp_server.clients.itervalues())

1971

2553

1972

2554

@dbus.service.method(_interface,

1973

2555

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

1975

2557

"D-Bus method"

1976

2558

return dbus.Dictionary(

1977

2559

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

1978

for c in tcp_server.clients),

2560

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

1979

2561

signature="oa{sv}")

1980

2562

1981

2563

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

1982

2564

def RemoveClient(self, object_path):

1983

2565

"D-Bus method"

1984

for c in tcp_server.clients:

2566

for c in tcp_server.clients.itervalues():

1985

2567

if c.dbus_object_path == object_path:

1986

tcp_server.clients.remove(c)

2568

del tcp_server.clients[c.name]

1987

2569

c.remove_from_connection()

1988

2570

# Don't signal anything except ClientRemoved

1989

2571

c.disable(quiet=True)

2000

2582

"Cleanup function; run on exit"

2001

2583

service.cleanup()

2002

2584

2585

multiprocessing.active_children()

2586

if not (tcp_server.clients or client_settings):

2587

return

2588

2589

# Store client before exiting. Secrets are encrypted with key

2590

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

2591

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

2592

clients = {}

2593

with PGPEngine() as pgp:

2594

for client in tcp_server.clients.itervalues():

2595

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

2596

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

2597

key)

2598

client_dict = {}

2599

2600

# A list of attributes that can not be pickled

2601

# + secret.

2602

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

2603

"checker"))

2604

for name, typ in (inspect.getmembers

2605

(dbus.service.Object)):

2606

exclude.add(name)

2607

2608

client_dict["encrypted_secret"] = (client

2609

.encrypted_secret)

2610

for attr in client.client_structure:

2611

if attr not in exclude:

2612

client_dict[attr] = getattr(client, attr)

2613

2614

clients[client.name] = client_dict

2615

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

2616

2617

try:

2618

with (tempfile.NamedTemporaryFile

2619

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

2620

dir=os.path.dirname(stored_state_path),

2621

delete=False)) as stored_state:

2622

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

2623

tempname=stored_state.name

2624

os.rename(tempname, stored_state_path)

2625

except (IOError, OSError) as e:

2626

if not debug:

2627

try:

2628

os.remove(tempname)

2629

except NameError:

2630

pass

2631

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

2632

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

2633

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

2634

else:

2635

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

2636

exc_info=e)

2637

raise e

2638

2639

# Delete all clients, and settings from config

2003

2640

while tcp_server.clients:

2004

client = tcp_server.clients.pop()

2641

name, client = tcp_server.clients.popitem()

2005

2642

if use_dbus:

2006

2643

client.remove_from_connection()

2007

client.disable_hook = None

2008

2644

# Don't signal anything except ClientRemoved

2009

2645

client.disable(quiet=True)

2010

2646

if use_dbus:

2011

2647

# Emit D-Bus signal

2012

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2648

mandos_dbus_service.ClientRemoved(client

2649

.dbus_object_path,

2013

2650

client.name)

2651

client_settings.clear()

2014

2652

2015

2653

atexit.register(cleanup)

2016

2654

2017

for client in tcp_server.clients:

2655

for client in tcp_server.clients.itervalues():

2018

2656

if use_dbus:

2019

2657

# Emit D-Bus signal

2020

2658

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2021

client.enable()

2659

# Need to initiate checking of clients

2660

if client.enabled:

2661

client.init_checker()

2022

2662

2023

2663

tcp_server.enable()

2024

2664

tcp_server.server_activate()

2027

2667

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

2028

2668

if use_ipv6:

2029

2669

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

2030

" flowinfo %d, scope_id %d"

2031

% tcp_server.socket.getsockname())

2670

" flowinfo %d, scope_id %d",

2671

*tcp_server.socket.getsockname())

2032

2672

else: # IPv4

2033

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

2034

% tcp_server.socket.getsockname())

2673

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

2674

*tcp_server.socket.getsockname())

2035

2675

2036

2676

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

2037

2677

2040

2680

try:

2041

2681

service.activate()

2042

2682

except dbus.exceptions.DBusException as error:

2043

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

2683

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

2044

2684

cleanup()

2045

2685

sys.exit(1)

2046

2686

# End of Avahi example code

2053

2693

logger.debug("Starting main loop")

2054

2694

main_loop.run()

2055

2695

except AvahiError as error:

2056

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

2696

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

2057

2697

cleanup()

2058

2698

sys.exit(1)

2059

2699

except KeyboardInterrupt:

2064

2704

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

2065

2705

cleanup()

2066

2706

2067

2068

2707

if __name__ == '__main__':

2069

2708

main()