/mandos/trunk : revision 575

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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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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 = "1.5.3"

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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)

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

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class AvahiServiceToSyslog(AvahiService):

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def rename(self):

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

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ret = AvahiService.rename(self)

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syslogger.setFormatter(logging.Formatter

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

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

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.format(self.name)))

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return ret

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def timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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class Client(object):

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

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Attributes:

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

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

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

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

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

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

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checker_initiator_tag: a gobject event source tag, or None

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

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client_structure: Object describing what attributes a client has

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and is used for storing the client at exit

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current_checker_command: string; current running checker_command

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

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disable_initiator_tag: a gobject event source tag, or None

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enabled: bool()

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

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

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

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

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last_enabled: datetime.datetime(); (UTC)

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last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, -2 means no checker completed yet.

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

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

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D-Bus identifiers

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

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

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until this client is disabled

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extended_timeout: extra long timeout when password has been sent

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extended_timeout: extra long timeout when secret has been sent

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runtime_expansions: Allowed attributes for runtime expansion.

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

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disabled, or None

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

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

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

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@staticmethod

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def _timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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

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"extended_timeout": "15m",

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"interval": "2m",

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

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"host": "",

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"approval_delay": "0s",

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"approval_duration": "1s",

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"approved_by_default": "True",

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"enabled": "True",

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}

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def timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

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return self._timedelta_to_milliseconds(self.timeout)

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return timedelta_to_milliseconds(self.timeout)

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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return self._timedelta_to_milliseconds(self.extended_timeout)

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return timedelta_to_milliseconds(self.extended_timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return self._timedelta_to_milliseconds(self.interval)

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return timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

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return self._timedelta_to_milliseconds(self.approval_delay)

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

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

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

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attribute."""

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return timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

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def config_parser(config):

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

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

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with exceptions for any special settings as defined above.

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

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value given the same arguments.

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"""

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settings = {}

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for client_name in config.sections():

479

section = dict(config.items(client_name))

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client = settings[client_name] = {}

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

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# Reformat values from string types to Python types

484

client["approved_by_default"] = config.getboolean(

485

client_name, "approved_by_default")

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

487

"enabled")

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

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.replace(" ", ""))

491

if "secret" in section:

492

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

493

elif "secfile" in section:

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

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(section["secfile"])),

496

"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"]

510

client["last_approval_request"] = None

511

client["last_checked_ok"] = None

512

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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517

self.name = name

338

if config is None:

339

config = {}

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# adding all client settings

519

for setting, value in settings.iteritems():

520

setattr(self, setting, value)

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if self.enabled:

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if not hasattr(self, "last_enabled"):

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self.last_enabled = datetime.datetime.utcnow()

525

if not hasattr(self, "expires"):

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

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+ self.timeout)

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else:

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self.last_enabled = None

530

self.expires = None

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340

532

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

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533

# Uppercase and remove spaces from fingerprint for later

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# comparison purposes with return value from the fingerprint()

343

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# function

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

345

.replace(" ", ""))

346

536

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

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if "secret" in config:

348

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

349

elif "secfile" in config:

350

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

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(config["secfile"])),

352

"rb") as secfile:

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self.secret = secfile.read()

354

else:

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

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% self.name)

357

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

358

self.created = datetime.datetime.utcnow()

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self.enabled = False

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self.last_approval_request = None

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self.last_enabled = None

362

self.last_checked_ok = None

363

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

364

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

365

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

366

self.disable_hook = disable_hook

537

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

538

datetime.datetime.utcnow())

539

540

# attributes specific for this server instance

367

541

self.checker = None

368

542

self.checker_initiator_tag = None

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543

self.disable_initiator_tag = None

370

self.expires = None

371

544

self.checker_callback_tag = None

372

self.checker_command = config["checker"]

373

545

self.current_checker_command = None

374

self.last_connect = None

375

self._approved = None

376

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

377

True)

546

self.approved = None

378

547

self.approvals_pending = 0

379

self.approval_delay = string_to_delta(

380

config["approval_delay"])

381

self.approval_duration = string_to_delta(

382

config["approval_duration"])

383

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

548

self.changedstate = (multiprocessing_manager

549

.Condition(multiprocessing_manager

550

.Lock()))

551

self.client_structure = [attr for attr in

552

self.__dict__.iterkeys()

553

if not attr.startswith("_")]

554

self.client_structure.append("client_structure")

555

556

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

557

lambda obj:

558

isinstance(obj,

559

property)):

560

if not name.startswith("_"):

561

self.client_structure.append(name)

384

562

563

# Send notice to process children that client state has changed

385

564

def send_changedstate(self):

386

self.changedstate.acquire()

387

self.changedstate.notify_all()

388

self.changedstate.release()

389

565

with self.changedstate:

566

self.changedstate.notify_all()

567

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def enable(self):

391

569

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

392

570

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

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571

# Already enabled

394

572

return

395

573

self.send_changedstate()

574

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

575

self.enabled = True

396

576

self.last_enabled = datetime.datetime.utcnow()

397

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

398

# and every interval from then on.

399

self.checker_initiator_tag = (gobject.timeout_add

400

(self.interval_milliseconds(),

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self.start_checker))

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

403

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

404

self.disable_initiator_tag = (gobject.timeout_add

405

(self.timeout_milliseconds(),

406

self.disable))

407

self.enabled = True

408

# Also start a new checker *right now*.

409

self.start_checker()

577

self.init_checker()

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def disable(self, quiet=True):

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"""Disable this client."""

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gobject.source_remove(self.checker_initiator_tag)

425

593

self.checker_initiator_tag = None

426

594

self.stop_checker()

427

if self.disable_hook:

428

self.disable_hook(self)

429

595

self.enabled = False

430

596

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

431

597

return False

432

598

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599

def __del__(self):

434

self.disable_hook = None

435

600

self.disable()

436

601

602

def init_checker(self):

603

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

604

# and every interval from then on.

605

self.checker_initiator_tag = (gobject.timeout_add

606

(self.interval_milliseconds(),

607

self.start_checker))

608

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

609

self.disable_initiator_tag = (gobject.timeout_add

610

(self.timeout_milliseconds(),

611

self.disable))

612

# Also start a new checker *right now*.

613

self.start_checker()

614

437

615

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

438

616

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

439

617

self.checker_callback_tag = None

440

618

self.checker = None

441

619

if os.WIFEXITED(condition):

442

exitstatus = os.WEXITSTATUS(condition)

443

if exitstatus == 0:

620

self.last_checker_status = os.WEXITSTATUS(condition)

621

if self.last_checker_status == 0:

444

622

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

445

623

vars(self))

446

624

self.checked_ok()

448

626

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

449

627

vars(self))

450

628

else:

629

self.last_checker_status = -1

451

630

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

452

631

vars(self))

453

632

454

def checked_ok(self, timeout=None):

455

"""Bump up the timeout for this client.

456

457

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

458

alive and well.

459

"""

633

def checked_ok(self):

634

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

635

self.last_checked_ok = datetime.datetime.utcnow()

636

self.last_checker_status = 0

637

self.bump_timeout()

638

639

def bump_timeout(self, timeout=None):

640

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

460

641

if timeout is None:

461

642

timeout = self.timeout

462

self.last_checked_ok = datetime.datetime.utcnow()

463

gobject.source_remove(self.disable_initiator_tag)

464

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

465

self.disable_initiator_tag = (gobject.timeout_add

466

(self._timedelta_to_milliseconds(timeout),

467

self.disable))

643

if self.disable_initiator_tag is not None:

644

gobject.source_remove(self.disable_initiator_tag)

645

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

646

self.disable_initiator_tag = (gobject.timeout_add

647

(timedelta_to_milliseconds

648

(timeout), self.disable))

649

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

468

650

469

651

def need_approval(self):

470

652

self.last_approval_request = datetime.datetime.utcnow()

510

692

'replace')))

511

693

for attr in

512

694

self.runtime_expansions)

513

695

514

696

try:

515

697

command = self.checker_command % escaped_attrs

516

698

except TypeError as error:

517

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

518

' %s', self.checker_command, error)

699

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

700

self.checker_command, exc_info=error)

519

701

return True # Try again later

520

702

self.current_checker_command = command

521

703

try:

539

721

gobject.source_remove(self.checker_callback_tag)

540

722

self.checker_callback(pid, status, command)

541

723

except OSError as error:

542

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

543

error)

724

logger.error("Failed to start subprocess",

725

exc_info=error)

544

726

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

545

727

return True

546

728

553

735

return

554

736

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

555

737

try:

556

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

738

self.checker.terminate()

557

739

#time.sleep(0.5)

558

740

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

559

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

741

# self.checker.kill()

560

742

except OSError as error:

561

743

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

562

744

raise

563

745

self.checker = None

564

746

747

565

748

def dbus_service_property(dbus_interface, signature="v",

566

749

access="readwrite", byte_arrays=False):

567

750

"""Decorators for marking methods of a DBusObjectWithProperties to

578

761

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

579

762

if byte_arrays and signature != "ay":

580

763

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

581

" signature %r" % signature)

764

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

582

765

def decorator(func):

583

766

func._dbus_is_property = True

584

767

func._dbus_interface = dbus_interface

592

775

return decorator

593

776

594

777

778

def dbus_interface_annotations(dbus_interface):

779

"""Decorator for marking functions returning interface annotations

780

781

Usage:

782

783

@dbus_interface_annotations("org.example.Interface")

784

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

785

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

786

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

787

"false"}

788

"""

789

def decorator(func):

790

func._dbus_is_interface = True

791

func._dbus_interface = dbus_interface

792

func._dbus_name = dbus_interface

793

return func

794

return decorator

795

796

797

def dbus_annotations(annotations):

798

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

799

Usage:

800

801

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

802

access="r")

803

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

804

"org.freedesktop.DBus.Property."

805

"EmitsChangedSignal": "false"})

806

def Property_dbus_property(self):

807

return dbus.Boolean(False)

808

"""

809

def decorator(func):

810

func._dbus_annotations = annotations

811

return func

812

return decorator

813

814

595

815

class DBusPropertyException(dbus.exceptions.DBusException):

596

816

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

597

817

"""

613

833

614

834

class DBusObjectWithProperties(dbus.service.Object):

615

835

"""A D-Bus object with properties.

616

836

617

837

Classes inheriting from this can use the dbus_service_property

618

838

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

619

839

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

620

840

"""

621

841

622

842

@staticmethod

623

def _is_dbus_property(obj):

624

return getattr(obj, "_dbus_is_property", False)

843

def _is_dbus_thing(thing):

844

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

845

846

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

847

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

848

"""

849

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

850

False)

625

851

626

def _get_all_dbus_properties(self):

852

def _get_all_dbus_things(self, thing):

627

853

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

628

854

"""

629

return ((prop._dbus_name, prop)

630

for name, prop in

631

inspect.getmembers(self, self._is_dbus_property))

855

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

856

name),

857

athing.__get__(self))

858

for cls in self.__class__.__mro__

859

for name, athing in

860

inspect.getmembers(cls,

861

self._is_dbus_thing(thing)))

632

862

633

863

def _get_dbus_property(self, interface_name, property_name):

634

864

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

635

865

property with the specified name and interface.

636

866

"""

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

867

for cls in self.__class__.__mro__:

868

for name, value in (inspect.getmembers

869

(cls,

870

self._is_dbus_thing("property"))):

871

if (value._dbus_name == property_name

872

and value._dbus_interface == interface_name):

873

return value.__get__(self)

874

647

875

# No such property

648

876

raise DBusPropertyNotFound(self.dbus_object_path + ":"

649

877

+ interface_name + "."

674

902

# signatures other than "ay".

675

903

if prop._dbus_signature != "ay":

676

904

raise ValueError

677

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

678

for byte in value))

905

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

906

for byte in value))

679

907

prop(value)

680

908

681

909

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

683

911

def GetAll(self, interface_name):

684

912

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

685

913

standard.

686

914

687

915

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

688

916

"""

689

all = {}

690

for name, prop in self._get_all_dbus_properties():

917

properties = {}

918

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

691

919

if (interface_name

692

920

and interface_name != prop._dbus_interface):

693

921

# Interface non-empty but did not match

697

925

continue

698

926

value = prop()

699

927

if not hasattr(value, "variant_level"):

700

all[name] = value

928

properties[name] = value

701

929

continue

702

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

703

value.variant_level+1)

704

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

930

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

931

value.variant_level+1)

932

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

705

933

706

934

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

707

935

out_signature="s",

708

936

path_keyword='object_path',

709

937

connection_keyword='connection')

710

938

def Introspect(self, object_path, connection):

711

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

939

"""Overloading of standard D-Bus method.

940

941

Inserts property tags and interface annotation tags.

712

942

"""

713

943

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

714

944

connection)

721

951

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

722

952

return e

723

953

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

954

# Add property tags

724

955

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

725

956

for name, prop

726

in self._get_all_dbus_properties()

957

in self._get_all_dbus_things("property")

727

958

if prop._dbus_interface

728

959

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

729

960

if_tag.appendChild(tag)

961

# Add annotation tags

962

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

963

for tag in if_tag.getElementsByTagName(typ):

964

annots = dict()

965

for name, prop in (self.

966

_get_all_dbus_things(typ)):

967

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

968

and prop._dbus_interface

969

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

970

annots.update(getattr

971

(prop,

972

"_dbus_annotations",

973

{}))

974

for name, value in annots.iteritems():

975

ann_tag = document.createElement(

976

"annotation")

977

ann_tag.setAttribute("name", name)

978

ann_tag.setAttribute("value", value)

979

tag.appendChild(ann_tag)

980

# Add interface annotation tags

981

for annotation, value in dict(

982

itertools.chain(

983

*(annotations().iteritems()

984

for name, annotations in

985

self._get_all_dbus_things("interface")

986

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

987

))).iteritems():

988

ann_tag = document.createElement("annotation")

989

ann_tag.setAttribute("name", annotation)

990

ann_tag.setAttribute("value", value)

991

if_tag.appendChild(ann_tag)

730

992

# Add the names to the return values for the

731

993

# "org.freedesktop.DBus.Properties" methods

732

994

if (if_tag.getAttribute("name")

747

1009

except (AttributeError, xml.dom.DOMException,

748

1010

xml.parsers.expat.ExpatError) as error:

749

1011

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

750

error)

1012

exc_info=error)

751

1013

return xmlstring

752

1014

753

1015

1016

def datetime_to_dbus (dt, variant_level=0):

1017

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

1018

if dt is None:

1019

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

1020

return dbus.String(dt.isoformat(),

1021

variant_level=variant_level)

1022

1023

1024

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1025

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

1026

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

1027

interface names according to the "alt_interface_names" mapping.

1028

Usage:

1029

1030

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

1031

"net.example.AlternateInterface"})

1032

class SampleDBusObject(dbus.service.Object):

1033

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

1034

def SampleDBusMethod():

1035

pass

1036

1037

The above "SampleDBusMethod" on "SampleDBusObject" will be

1038

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

1039

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

1040

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

1041

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

1042

1043

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

1044

(from DBusObjectWithProperties) and interfaces (from the

1045

dbus_interface_annotations decorator).

1046

"""

1047

def wrapper(cls):

1048

for orig_interface_name, alt_interface_name in (

1049

alt_interface_names.iteritems()):

1050

attr = {}

1051

interface_names = set()

1052

# Go though all attributes of the class

1053

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

1054

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

1055

# with the wrong interface name

1056

if (not hasattr(attribute, "_dbus_interface")

1057

or not attribute._dbus_interface

1058

.startswith(orig_interface_name)):

1059

continue

1060

# Create an alternate D-Bus interface name based on

1061

# the current name

1062

alt_interface = (attribute._dbus_interface

1063

.replace(orig_interface_name,

1064

alt_interface_name))

1065

interface_names.add(alt_interface)

1066

# Is this a D-Bus signal?

1067

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

1068

# Extract the original non-method function by

1069

# black magic

1070

nonmethod_func = (dict(

1071

zip(attribute.func_code.co_freevars,

1072

attribute.__closure__))["func"]

1073

.cell_contents)

1074

# Create a new, but exactly alike, function

1075

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

1076

# with the alternate D-Bus interface name

1077

new_function = (dbus.service.signal

1078

(alt_interface,

1079

attribute._dbus_signature)

1080

(types.FunctionType(

1081

nonmethod_func.func_code,

1082

nonmethod_func.func_globals,

1083

nonmethod_func.func_name,

1084

nonmethod_func.func_defaults,

1085

nonmethod_func.func_closure)))

1086

# Copy annotations, if any

1087

try:

1088

new_function._dbus_annotations = (

1089

dict(attribute._dbus_annotations))

1090

except AttributeError:

1091

pass

1092

# Define a creator of a function to call both the

1093

# original and alternate functions, so both the

1094

# original and alternate signals gets sent when

1095

# the function is called

1096

def fixscope(func1, func2):

1097

"""This function is a scope container to pass

1098

func1 and func2 to the "call_both" function

1099

outside of its arguments"""

1100

def call_both(*args, **kwargs):

1101

"""This function will emit two D-Bus

1102

signals by calling func1 and func2"""

1103

func1(*args, **kwargs)

1104

func2(*args, **kwargs)

1105

return call_both

1106

# Create the "call_both" function and add it to

1107

# the class

1108

attr[attrname] = fixscope(attribute, new_function)

1109

# Is this a D-Bus method?

1110

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

1111

# Create a new, but exactly alike, function

1112

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

1113

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

1114

# to the class.

1115

attr[attrname] = (dbus.service.method

1116

(alt_interface,

1117

attribute._dbus_in_signature,

1118

attribute._dbus_out_signature)

1119

(types.FunctionType

1120

(attribute.func_code,

1121

attribute.func_globals,

1122

attribute.func_name,

1123

attribute.func_defaults,

1124

attribute.func_closure)))

1125

# Copy annotations, if any

1126

try:

1127

attr[attrname]._dbus_annotations = (

1128

dict(attribute._dbus_annotations))

1129

except AttributeError:

1130

pass

1131

# Is this a D-Bus property?

1132

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

1133

# Create a new, but exactly alike, function

1134

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

1135

# property with the alternate D-Bus interface

1136

# name. Add it to the class.

1137

attr[attrname] = (dbus_service_property

1138

(alt_interface,

1139

attribute._dbus_signature,

1140

attribute._dbus_access,

1141

attribute

1142

._dbus_get_args_options

1143

["byte_arrays"])

1144

(types.FunctionType

1145

(attribute.func_code,

1146

attribute.func_globals,

1147

attribute.func_name,

1148

attribute.func_defaults,

1149

attribute.func_closure)))

1150

# Copy annotations, if any

1151

try:

1152

attr[attrname]._dbus_annotations = (

1153

dict(attribute._dbus_annotations))

1154

except AttributeError:

1155

pass

1156

# Is this a D-Bus interface?

1157

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

1158

# Create a new, but exactly alike, function

1159

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

1160

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

1161

# to the class.

1162

attr[attrname] = (dbus_interface_annotations

1163

(alt_interface)

1164

(types.FunctionType

1165

(attribute.func_code,

1166

attribute.func_globals,

1167

attribute.func_name,

1168

attribute.func_defaults,

1169

attribute.func_closure)))

1170

if deprecate:

1171

# Deprecate all alternate interfaces

1172

iname="_AlternateDBusNames_interface_annotation{0}"

1173

for interface_name in interface_names:

1174

@dbus_interface_annotations(interface_name)

1175

def func(self):

1176

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

1177

"true" }

1178

# Find an unused name

1179

for aname in (iname.format(i)

1180

for i in itertools.count()):

1181

if aname not in attr:

1182

attr[aname] = func

1183

break

1184

if interface_names:

1185

# Replace the class with a new subclass of it with

1186

# methods, signals, etc. as created above.

1187

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

1188

(cls,), attr)

1189

return cls

1190

return wrapper

1191

1192

1193

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

1194

"se.bsnet.fukt.Mandos"})

754

1195

class ClientDBus(Client, DBusObjectWithProperties):

755

1196

"""A Client class using D-Bus

756

1197

765

1206

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

766

1207

767

1208

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

768

self._approvals_pending = 0

769

1209

self.bus = bus

770

1210

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

771

1211

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

777

1217

("/clients/" + client_object_name))

778

1218

DBusObjectWithProperties.__init__(self, self.bus,

779

1219

self.dbus_object_path)

780

def _set_expires(self, value):

781

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

782

self._expires = value

783

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

784

dbus_time = (self._datetime_to_dbus(self._expires,

785

variant_level=1))

786

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

787

dbus_time)

788

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

789

del _set_expires

790

791

def _get_approvals_pending(self):

792

return self._approvals_pending

793

def _set_approvals_pending(self, value):

794

old_value = self._approvals_pending

795

self._approvals_pending = value

796

bval = bool(value)

797

if (hasattr(self, "dbus_object_path")

798

and bval is not bool(old_value)):

799

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

800

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

801

dbus_bool)

802

803

approvals_pending = property(_get_approvals_pending,

804

_set_approvals_pending)

805

del _get_approvals_pending, _set_approvals_pending

806

807

@staticmethod

808

def _datetime_to_dbus(dt, variant_level=0):

809

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

810

if dt is None:

811

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

812

return dbus.String(dt.isoformat(),

813

variant_level=variant_level)

814

815

def enable(self):

816

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

817

r = Client.enable(self)

818

if oldstate != self.enabled:

819

# Emit D-Bus signals

820

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

821

dbus.Boolean(True, variant_level=1))

822

self.PropertyChanged(

823

dbus.String("LastEnabled"),

824

self._datetime_to_dbus(self.last_enabled,

825

variant_level=1))

826

return r

827

828

def disable(self, quiet = False):

829

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

830

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

831

if not quiet and oldstate != self.enabled:

832

# Emit D-Bus signal

833

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

834

dbus.Boolean(False, variant_level=1))

835

return r

1220

1221

def notifychangeproperty(transform_func,

1222

dbus_name, type_func=lambda x: x,

1223

variant_level=1):

1224

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

1225

its changes to DBus.

1226

1227

transform_fun: Function that takes a value and a variant_level

1228

and transforms it to a D-Bus type.

1229

dbus_name: D-Bus name of the variable

1230

type_func: Function that transform the value before sending it

1231

to the D-Bus. Default: no transform

1232

variant_level: D-Bus variant level. Default: 1

1233

"""

1234

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

1235

def setter(self, value):

1236

if hasattr(self, "dbus_object_path"):

1237

if (not hasattr(self, attrname) or

1238

type_func(getattr(self, attrname, None))

1239

!= type_func(value)):

1240

dbus_value = transform_func(type_func(value),

1241

variant_level

1242

=variant_level)

1243

self.PropertyChanged(dbus.String(dbus_name),

1244

dbus_value)

1245

setattr(self, attrname, value)

1246

1247

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

1248

1249

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1250

approvals_pending = notifychangeproperty(dbus.Boolean,

1251

"ApprovalPending",

1252

type_func = bool)

1253

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

1254

last_enabled = notifychangeproperty(datetime_to_dbus,

1255

"LastEnabled")

1256

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

1257

type_func = lambda checker:

1258

checker is not None)

1259

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1260

"LastCheckedOK")

1261

last_checker_status = notifychangeproperty(dbus.Int16,

1262

"LastCheckerStatus")

1263

last_approval_request = notifychangeproperty(

1264

datetime_to_dbus, "LastApprovalRequest")

1265

approved_by_default = notifychangeproperty(dbus.Boolean,

1266

"ApprovedByDefault")

1267

approval_delay = notifychangeproperty(dbus.UInt64,

1268

"ApprovalDelay",

1269

type_func =

1270

timedelta_to_milliseconds)

1271

approval_duration = notifychangeproperty(

1272

dbus.UInt64, "ApprovalDuration",

1273

type_func = timedelta_to_milliseconds)

1274

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

1275

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

1276

type_func =

1277

timedelta_to_milliseconds)

1278

extended_timeout = notifychangeproperty(

1279

dbus.UInt64, "ExtendedTimeout",

1280

type_func = timedelta_to_milliseconds)

1281

interval = notifychangeproperty(dbus.UInt64,

1282

"Interval",

1283

type_func =

1284

timedelta_to_milliseconds)

1285

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

1286

1287

del notifychangeproperty

836

1288

837

1289

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

838

1290

try:

847

1299

*args, **kwargs):

848

1300

self.checker_callback_tag = None

849

1301

self.checker = None

850

# Emit D-Bus signal

851

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

852

dbus.Boolean(False, variant_level=1))

853

1302

if os.WIFEXITED(condition):

854

1303

exitstatus = os.WEXITSTATUS(condition)

855

1304

# Emit D-Bus signal

865

1314

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

866

1315

*args, **kwargs)

867

1316

868

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

869

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

870

# Emit D-Bus signal

871

self.PropertyChanged(

872

dbus.String("LastCheckedOK"),

873

(self._datetime_to_dbus(self.last_checked_ok,

874

variant_level=1)))

875

876

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

877

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

878

# Emit D-Bus signal

879

self.PropertyChanged(

880

dbus.String("LastApprovalRequest"),

881

(self._datetime_to_dbus(self.last_approval_request,

882

variant_level=1)))

883

return r

884

885

1317

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

886

1318

old_checker = self.checker

887

1319

if self.checker is not None:

894

1326

and old_checker_pid != self.checker.pid):

895

1327

# Emit D-Bus signal

896

1328

self.CheckerStarted(self.current_checker_command)

897

self.PropertyChanged(

898

dbus.String("CheckerRunning"),

899

dbus.Boolean(True, variant_level=1))

900

1329

return r

901

1330

902

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

903

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

904

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

905

if (old_checker is not None

906

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

907

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

908

dbus.Boolean(False, variant_level=1))

909

return r

910

911

1331

def _reset_approved(self):

912

self._approved = None

1332

self.approved = None

913

1333

return False

914

1334

915

1335

def approve(self, value=True):

916

1336

self.send_changedstate()

917

self._approved = value

918

gobject.timeout_add(self._timedelta_to_milliseconds

1337

self.approved = value

1338

gobject.timeout_add(timedelta_to_milliseconds

919

1339

(self.approval_duration),

920

1340

self._reset_approved)

921

1341

922

923

1342

## D-Bus methods, signals & properties

924

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

1343

_interface = "se.recompile.Mandos.Client"

1344

1345

## Interfaces

1346

1347

@dbus_interface_annotations(_interface)

1348

def _foo(self):

1349

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

1350

"false"}

925

1351

926

1352

## Signals

927

1353

1012

1438

def ApprovedByDefault_dbus_property(self, value=None):

1013

1439

if value is None: # get

1014

1440

return dbus.Boolean(self.approved_by_default)

1015

old_value = self.approved_by_default

1016

1441

self.approved_by_default = bool(value)

1017

# Emit D-Bus signal

1018

if old_value != self.approved_by_default:

1019

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

1020

dbus.Boolean(value, variant_level=1))

1021

1442

1022

1443

# ApprovalDelay - property

1023

1444

@dbus_service_property(_interface, signature="t",

1025

1446

def ApprovalDelay_dbus_property(self, value=None):

1026

1447

if value is None: # get

1027

1448

return dbus.UInt64(self.approval_delay_milliseconds())

1028

old_value = self.approval_delay

1029

1449

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

1030

# Emit D-Bus signal

1031

if old_value != self.approval_delay:

1032

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

1033

dbus.UInt64(value, variant_level=1))

1034

1450

1035

1451

# ApprovalDuration - property

1036

1452

@dbus_service_property(_interface, signature="t",

1037

1453

access="readwrite")

1038

1454

def ApprovalDuration_dbus_property(self, value=None):

1039

1455

if value is None: # get

1040

return dbus.UInt64(self._timedelta_to_milliseconds(

1456

return dbus.UInt64(timedelta_to_milliseconds(

1041

1457

self.approval_duration))

1042

old_value = self.approval_duration

1043

1458

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

1044

# Emit D-Bus signal

1045

if old_value != self.approval_duration:

1046

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

1047

dbus.UInt64(value, variant_level=1))

1048

1459

1049

1460

# Name - property

1050

1461

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

1062

1473

def Host_dbus_property(self, value=None):

1063

1474

if value is None: # get

1064

1475

return dbus.String(self.host)

1065

old_value = self.host

1066

self.host = value

1067

# Emit D-Bus signal

1068

if old_value != self.host:

1069

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

1070

dbus.String(value, variant_level=1))

1476

self.host = unicode(value)

1071

1477

1072

1478

# Created - property

1073

1479

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

1074

1480

def Created_dbus_property(self):

1075

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

1481

return datetime_to_dbus(self.created)

1076

1482

1077

1483

# LastEnabled - property

1078

1484

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

1079

1485

def LastEnabled_dbus_property(self):

1080

return self._datetime_to_dbus(self.last_enabled)

1486

return datetime_to_dbus(self.last_enabled)

1081

1487

1082

1488

# Enabled - property

1083

1489

@dbus_service_property(_interface, signature="b",

1097

1503

if value is not None:

1098

1504

self.checked_ok()

1099

1505

return

1100

return self._datetime_to_dbus(self.last_checked_ok)

1506

return datetime_to_dbus(self.last_checked_ok)

1507

1508

# LastCheckerStatus - property

1509

@dbus_service_property(_interface, signature="n",

1510

access="read")

1511

def LastCheckerStatus_dbus_property(self):

1512

return dbus.Int16(self.last_checker_status)

1101

1513

1102

1514

# Expires - property

1103

1515

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

1104

1516

def Expires_dbus_property(self):

1105

return self._datetime_to_dbus(self.expires)

1517

return datetime_to_dbus(self.expires)

1106

1518

1107

1519

# LastApprovalRequest - property

1108

1520

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

1109

1521

def LastApprovalRequest_dbus_property(self):

1110

return self._datetime_to_dbus(self.last_approval_request)

1522

return datetime_to_dbus(self.last_approval_request)

1111

1523

1112

1524

# Timeout - property

1113

1525

@dbus_service_property(_interface, signature="t",

1115

1527

def Timeout_dbus_property(self, value=None):

1116

1528

if value is None: # get

1117

1529

return dbus.UInt64(self.timeout_milliseconds())

1118

old_value = self.timeout

1119

1530

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

1120

# Emit D-Bus signal

1121

if old_value != self.timeout:

1122

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

1123

dbus.UInt64(value, variant_level=1))

1124

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

1125

return

1126

1531

# Reschedule timeout

1127

gobject.source_remove(self.disable_initiator_tag)

1128

self.disable_initiator_tag = None

1129

self.expires = None

1130

time_to_die = (self.

1131

_timedelta_to_milliseconds((self

1132

.last_checked_ok

1133

+ self.timeout)

1134

- datetime.datetime

1135

.utcnow()))

1136

if time_to_die <= 0:

1137

# The timeout has passed

1138

self.disable()

1139

else:

1140

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

1141

+ datetime.timedelta(milliseconds = time_to_die))

1142

self.disable_initiator_tag = (gobject.timeout_add

1143

(time_to_die, self.disable))

1144

1532

if self.enabled:

1533

now = datetime.datetime.utcnow()

1534

time_to_die = timedelta_to_milliseconds(

1535

(self.last_checked_ok + self.timeout) - now)

1536

if time_to_die <= 0:

1537

# The timeout has passed

1538

self.disable()

1539

else:

1540

self.expires = (now +

1541

datetime.timedelta(milliseconds =

1542

time_to_die))

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 = (gobject.timeout_add

1548

(time_to_die,

1549

self.disable))

1550

1145

1551

# ExtendedTimeout - property

1146

1552

@dbus_service_property(_interface, signature="t",

1147

1553

access="readwrite")

1148

1554

def ExtendedTimeout_dbus_property(self, value=None):

1149

1555

if value is None: # get

1150

1556

return dbus.UInt64(self.extended_timeout_milliseconds())

1151

old_value = self.extended_timeout

1152

1557

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

1153

# Emit D-Bus signal

1154

if old_value != self.extended_timeout:

1155

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

1156

dbus.UInt64(value, variant_level=1))

1157

1558

1158

1559

# Interval - property

1159

1560

@dbus_service_property(_interface, signature="t",

1160

1561

access="readwrite")

1161

1562

def Interval_dbus_property(self, value=None):

1162

1563

if value is None: # get

1163

1564

return dbus.UInt64(self.interval_milliseconds())

1164

old_value = self.interval

1165

1565

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

1166

# Emit D-Bus signal

1167

if old_value != self.interval:

1168

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

1169

dbus.UInt64(value, variant_level=1))

1170

1566

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

1171

1567

return

1172

# Reschedule checker run

1173

gobject.source_remove(self.checker_initiator_tag)

1174

self.checker_initiator_tag = (gobject.timeout_add

1175

(value, self.start_checker))

1176

self.start_checker() # Start one now, too

1177

1568

if self.enabled:

1569

# Reschedule checker run

1570

gobject.source_remove(self.checker_initiator_tag)

1571

self.checker_initiator_tag = (gobject.timeout_add

1572

(value, self.start_checker))

1573

self.start_checker() # Start one now, too

1574

1178

1575

# Checker - property

1179

1576

@dbus_service_property(_interface, signature="s",

1180

1577

access="readwrite")

1181

1578

def Checker_dbus_property(self, value=None):

1182

1579

if value is None: # get

1183

1580

return dbus.String(self.checker_command)

1184

old_value = self.checker_command

1185

self.checker_command = value

1186

# Emit D-Bus signal

1187

if old_value != self.checker_command:

1188

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

1189

dbus.String(self.checker_command,

1190

variant_level=1))

1581

self.checker_command = unicode(value)

1191

1582

1192

1583

# CheckerRunning - property

1193

1584

@dbus_service_property(_interface, signature="b",

1220

1611

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

1221

1612

if not self._pipe.recv():

1222

1613

raise KeyError()

1223

1614

1224

1615

def __getattribute__(self, name):

1225

if(name == '_pipe'):

1616

if name == '_pipe':

1226

1617

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

1227

1618

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

1228

1619

data = self._pipe.recv()

1233

1624

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

1234

1625

return self._pipe.recv()[1]

1235

1626

return func

1236

1627

1237

1628

def __setattr__(self, name, value):

1238

if(name == '_pipe'):

1629

if name == '_pipe':

1239

1630

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

1240

1631

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

1241

1632

1252

1643

unicode(self.client_address))

1253

1644

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

1254

1645

self.server.child_pipe.fileno())

1255

1646

1256

1647

session = (gnutls.connection

1257

1648

.ClientSession(self.request,

1258

1649

gnutls.connection

1259

1650

.X509Credentials()))

1260

1651

1261

1652

# Note: gnutls.connection.X509Credentials is really a

1262

1653

# generic GnuTLS certificate credentials object so long as

1263

1654

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

1264

1655

# here despite using OpenPGP certificates.

1265

1656

1266

1657

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

1267

1658

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

1268

1659

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

1274

1665

(gnutls.library.functions

1275

1666

.gnutls_priority_set_direct(session._c_object,

1276

1667

priority, None))

1277

1668

1278

1669

# Start communication using the Mandos protocol

1279

1670

# Get protocol number

1280

1671

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

1285

1676

except (ValueError, IndexError, RuntimeError) as error:

1286

1677

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

1287

1678

return

1288

1679

1289

1680

# Start GnuTLS connection

1290

1681

try:

1291

1682

session.handshake()

1295

1686

# established. Just abandon the request.

1296

1687

return

1297

1688

logger.debug("Handshake succeeded")

1298

1689

1299

1690

approval_required = False

1300

1691

try:

1301

1692

try:

1306

1697

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

1307

1698

return

1308

1699

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

1309

1700

1310

1701

try:

1311

1702

client = ProxyClient(child_pipe, fpr,

1312

1703

self.client_address)

1324

1715

client.name)

1325

1716

if self.server.use_dbus:

1326

1717

# Emit D-Bus signal

1327

client.Rejected("Disabled")

1718

client.Rejected("Disabled")

1328

1719

return

1329

1720

1330

if client._approved or not client.approval_delay:

1721

if client.approved or not client.approval_delay:

1331

1722

#We are approved or approval is disabled

1332

1723

break

1333

elif client._approved is None:

1724

elif client.approved is None:

1334

1725

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

1335

1726

client.name)

1336

1727

if self.server.use_dbus:

1347

1738

return

1348

1739

1349

1740

#wait until timeout or approved

1350

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

1351

1741

time = datetime.datetime.now()

1352

1742

client.changedstate.acquire()

1353

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

1743

(client.changedstate.wait

1744

(float(client.timedelta_to_milliseconds(delay)

1745

/ 1000)))

1354

1746

client.changedstate.release()

1355

1747

time2 = datetime.datetime.now()

1356

1748

if (time2 - time) >= delay:

1372

1764

try:

1373

1765

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

1374

1766

except gnutls.errors.GNUTLSError as error:

1375

logger.warning("gnutls send failed")

1767

logger.warning("gnutls send failed",

1768

exc_info=error)

1376

1769

return

1377

1770

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

1378

1771

sent, len(client.secret)

1379

1772

- (sent_size + sent))

1380

1773

sent_size += sent

1381

1774

1382

1775

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

1383

# bump the timeout as if seen

1384

client.checked_ok(client.extended_timeout)

1776

# bump the timeout using extended_timeout

1777

client.bump_timeout(client.extended_timeout)

1385

1778

if self.server.use_dbus:

1386

1779

# Emit D-Bus signal

1387

1780

client.GotSecret()

1392

1785

try:

1393

1786

session.bye()

1394

1787

except gnutls.errors.GNUTLSError as error:

1395

logger.warning("GnuTLS bye failed")

1788

logger.warning("GnuTLS bye failed",

1789

exc_info=error)

1396

1790

1397

1791

@staticmethod

1398

1792

def peer_certificate(session):

1454

1848

# Convert the buffer to a Python bytestring

1455

1849

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

1456

1850

# Convert the bytestring to hexadecimal notation

1457

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

1851

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

1458

1852

return hex_fpr

1459

1853

1460

1854

1463

1857

def sub_process_main(self, request, address):

1464

1858

try:

1465

1859

self.finish_request(request, address)

1466

except:

1860

except Exception:

1467

1861

self.handle_error(request, address)

1468

1862

self.close_request(request)

1469

1863

1470

1864

def process_request(self, request, address):

1471

1865

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

1472

multiprocessing.Process(target = self.sub_process_main,

1473

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

1866

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

1867

args = (request,

1868

address))

1869

proc.start()

1870

return proc

1871

1474

1872

1475

1873

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1476

1874

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

1480

1878

This function creates a new pipe in self.pipe

1481

1879

"""

1482

1880

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1483

1484

super(MultiprocessingMixInWithPipe,

1485

self).process_request(request, client_address)

1881

1882

proc = MultiprocessingMixIn.process_request(self, request,

1883

client_address)

1486

1884

self.child_pipe.close()

1487

self.add_pipe(parent_pipe)

1488

1489

def add_pipe(self, parent_pipe):

1885

self.add_pipe(parent_pipe, proc)

1886

1887

def add_pipe(self, parent_pipe, proc):

1490

1888

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

1491

1889

raise NotImplementedError

1492

1890

1891

1493

1892

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1494

1893

socketserver.TCPServer, object):

1495

1894

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

1569

1968

self.enabled = False

1570

1969

self.clients = clients

1571

1970

if self.clients is None:

1572

self.clients = set()

1971

self.clients = {}

1573

1972

self.use_dbus = use_dbus

1574

1973

self.gnutls_priority = gnutls_priority

1575

1974

IPv6_TCPServer.__init__(self, server_address,

1579

1978

def server_activate(self):

1580

1979

if self.enabled:

1581

1980

return socketserver.TCPServer.server_activate(self)

1981

1582

1982

def enable(self):

1583

1983

self.enabled = True

1584

def add_pipe(self, parent_pipe):

1984

1985

def add_pipe(self, parent_pipe, proc):

1585

1986

# Call "handle_ipc" for both data and EOF events

1586

1987

gobject.io_add_watch(parent_pipe.fileno(),

1587

1988

gobject.IO_IN | gobject.IO_HUP,

1588

1989

functools.partial(self.handle_ipc,

1589

parent_pipe = parent_pipe))

1590

1990

parent_pipe =

1991

parent_pipe,

1992

proc = proc))

1993

1591

1994

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

1592

client_object=None):

1995

proc = None, client_object=None):

1593

1996

condition_names = {

1594

1997

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

1595

1998

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

1604

2007

for cond, name in

1605

2008

condition_names.iteritems()

1606

2009

if cond & condition)

1607

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

2010

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

1608

2011

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

2012

# Wait for other process to exit

2013

proc.join()

1609

2014

return False

1610

2015

1611

2016

# Read a request from the child

1616

2021

fpr = request[1]

1617

2022

address = request[2]

1618

2023

1619

for c in self.clients:

2024

for c in self.clients.itervalues():

1620

2025

if c.fingerprint == fpr:

1621

2026

client = c

1622

2027

break

1625

2030

"dress: %s", fpr, address)

1626

2031

if self.use_dbus:

1627

2032

# Emit D-Bus signal

1628

mandos_dbus_service.ClientNotFound(fpr, address[0])

2033

mandos_dbus_service.ClientNotFound(fpr,

2034

address[0])

1629

2035

parent_pipe.send(False)

1630

2036

return False

1631

2037

1632

2038

gobject.io_add_watch(parent_pipe.fileno(),

1633

2039

gobject.IO_IN | gobject.IO_HUP,

1634

2040

functools.partial(self.handle_ipc,

1635

parent_pipe = parent_pipe,

1636

client_object = client))

2041

parent_pipe =

2042

parent_pipe,

2043

proc = proc,

2044

client_object =

2045

client))

1637

2046

parent_pipe.send(True)

1638

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

2047

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

2048

# same fileno

1639

2049

return False

1640

2050

if command == 'funcall':

1641

2051

funcname = request[1]

1642

2052

args = request[2]

1643

2053

kwargs = request[3]

1644

2054

1645

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

1646

2055

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

2056

funcname)(*args,

2057

**kwargs)))

2058

1647

2059

if command == 'getattr':

1648

2060

attrname = request[1]

1649

2061

if callable(client_object.__getattribute__(attrname)):

1650

2062

parent_pipe.send(('function',))

1651

2063

else:

1652

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

2064

parent_pipe.send(('data', client_object

2065

.__getattribute__(attrname)))

1653

2066

1654

2067

if command == 'setattr':

1655

2068

attrname = request[1]

1656

2069

value = request[2]

1657

2070

setattr(client_object, attrname, value)

1658

2071

1659

2072

return True

1660

2073

1661

2074

1691

2104

elif suffix == "w":

1692

2105

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

1693

2106

else:

1694

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

2107

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

2108

.format(suffix))

1695

2109

except (ValueError, IndexError) as e:

1696

2110

raise ValueError(*(e.args))

1697

2111

timevalue += delta

1698

2112

return timevalue

1699

2113

1700

2114

1701

def if_nametoindex(interface):

1702

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

1703

1704

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

1705

global if_nametoindex

1706

try:

1707

if_nametoindex = (ctypes.cdll.LoadLibrary

1708

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

1709

.if_nametoindex)

1710

except (OSError, AttributeError):

1711

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

1712

def if_nametoindex(interface):

1713

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

1714

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

1715

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

1716

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1717

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

1718

interface))

1719

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

1720

ifreq[16:20])[0]

1721

return interface_index

1722

return if_nametoindex(interface)

1723

1724

1725

2115

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

1726

2116

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

1727

2117

1735

2125

sys.exit()

1736

2126

if not noclose:

1737

2127

# Close all standard open file descriptors

1738

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

2128

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

1739

2129

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

1740

2130

raise OSError(errno.ENODEV,

1741

"%s not a character device"

1742

% os.path.devnull)

2131

"{0} not a character device"

2132

.format(os.devnull))

1743

2133

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

1744

2134

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

1745

2135

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

1754

2144

1755

2145

parser = argparse.ArgumentParser()

1756

2146

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

1757

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

2147

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

1758

2148

help="show version number and exit")

1759

2149

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

1760

2150

help="Bind to interface IF")

1782

2172

" system bus interface")

1783

2173

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

1784

2174

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

2175

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

2176

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

2177

" state")

2178

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

2179

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

2180

1785

2181

options = parser.parse_args()

1786

2182

1787

2183

if options.check:

1800

2196

"use_dbus": "True",

1801

2197

"use_ipv6": "True",

1802

2198

"debuglevel": "",

2199

"restore": "True",

2200

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

1803

2201

}

1804

2202

1805

2203

# Parse config file for server-global settings

1822

2220

# options, if set.

1823

2221

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

1824

2222

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

1825

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

2223

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

2224

"statedir"):

1826

2225

value = getattr(options, option)

1827

2226

if value is not None:

1828

2227

server_settings[option] = value

1840

2239

debuglevel = server_settings["debuglevel"]

1841

2240

use_dbus = server_settings["use_dbus"]

1842

2241

use_ipv6 = server_settings["use_ipv6"]

1843

2242

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

2243

stored_state_file)

2244

2245

if debug:

2246

initlogger(debug, logging.DEBUG)

2247

else:

2248

if not debuglevel:

2249

initlogger(debug)

2250

else:

2251

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

2252

initlogger(debug, level)

2253

1844

2254

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

1845

2255

syslogger.setFormatter(logging.Formatter

1846

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

1847

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

1848

% server_settings["servicename"]))

2256

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

2257

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

2258

.format(server_settings

2259

["servicename"])))

1849

2260

1850

2261

# Parse config file with clients

1851

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

1852

"extended_timeout": "15m",

1853

"interval": "2m",

1854

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

1855

"host": "",

1856

"approval_delay": "0s",

1857

"approval_duration": "1s",

1858

}

1859

client_config = configparser.SafeConfigParser(client_defaults)

2262

client_config = configparser.SafeConfigParser(Client

2263

.client_defaults)

1860

2264

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

1861

2265

"clients.conf"))

1862

2266

1876

2280

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

1877

2281

try:

1878

2282

pidfile = open(pidfilename, "w")

1879

except IOError:

1880

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

2283

except IOError as e:

2284

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

2285

exc_info=e)

1881

2286

1882

try:

1883

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

1884

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

1885

except KeyError:

2287

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

1886

2288

try:

1887

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

1888

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

2289

uid = pwd.getpwnam(name).pw_uid

2290

gid = pwd.getpwnam(name).pw_gid

2291

break

1889

2292

except KeyError:

1890

try:

1891

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

1892

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

1893

except KeyError:

1894

uid = 65534

1895

gid = 65534

2293

continue

2294

else:

2295

uid = 65534

2296

gid = 65534

1896

2297

try:

1897

2298

os.setgid(gid)

1898

2299

os.setuid(uid)

1900

2301

if error[0] != errno.EPERM:

1901

2302

raise error

1902

2303

1903

if not debug and not debuglevel:

1904

syslogger.setLevel(logging.WARNING)

1905

console.setLevel(logging.WARNING)

1906

if debuglevel:

1907

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

1908

syslogger.setLevel(level)

1909

console.setLevel(level)

1910

1911

2304

if debug:

1912

2305

# Enable all possible GnuTLS debugging

1913

2306

1923

2316

.gnutls_global_set_log_function(debug_gnutls))

1924

2317

1925

2318

# Redirect stdin so all checkers get /dev/null

1926

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

2319

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

1927

2320

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

1928

2321

if null > 2:

1929

2322

os.close(null)

1930

else:

1931

# No console logging

1932

logger.removeHandler(console)

1933

2323

1934

2324

# Need to fork before connecting to D-Bus

1935

2325

if not debug:

1936

2326

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

1937

2327

daemon()

1938

2328

2329

gobject.threads_init()

2330

1939

2331

global main_loop

1940

2332

# From the Avahi example code

1941

DBusGMainLoop(set_as_default=True )

2333

DBusGMainLoop(set_as_default=True)

1942

2334

main_loop = gobject.MainLoop()

1943

2335

bus = dbus.SystemBus()

1944

2336

# End of Avahi example code

1945

2337

if use_dbus:

1946

2338

try:

1947

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

2339

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

1948

2340

bus, do_not_queue=True)

2341

old_bus_name = (dbus.service.BusName

2342

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

2343

do_not_queue=True))

1949

2344

except dbus.exceptions.NameExistsException as e:

1950

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

2345

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

1951

2346

use_dbus = False

1952

2347

server_settings["use_dbus"] = False

1953

2348

tcp_server.use_dbus = False

1954

2349

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1955

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

1956

servicetype = "_mandos._tcp",

1957

protocol = protocol, bus = bus)

2350

service = AvahiServiceToSyslog(name =

2351

server_settings["servicename"],

2352

servicetype = "_mandos._tcp",

2353

protocol = protocol, bus = bus)

1958

2354

if server_settings["interface"]:

1959

2355

service.interface = (if_nametoindex

1960

2356

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

1965

2361

client_class = Client

1966

2362

if use_dbus:

1967

2363

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

1968

def client_config_items(config, section):

1969

special_settings = {

1970

"approved_by_default":

1971

lambda: config.getboolean(section,

1972

"approved_by_default"),

1973

}

1974

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

2364

2365

client_settings = Client.config_parser(client_config)

2366

old_client_settings = {}

2367

clients_data = {}

2368

2369

# Get client data and settings from last running state.

2370

if server_settings["restore"]:

2371

try:

2372

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

2373

clients_data, old_client_settings = (pickle.load

2374

(stored_state))

2375

os.remove(stored_state_path)

2376

except IOError as e:

2377

if e.errno == errno.ENOENT:

2378

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

2379

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

2380

else:

2381

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

2382

exc_info=e)

2383

raise

2384

except EOFError as e:

2385

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

2386

"EOFError:", exc_info=e)

2387

2388

with PGPEngine() as pgp:

2389

for client_name, client in clients_data.iteritems():

2390

# Decide which value to use after restoring saved state.

2391

# We have three different values: Old config file,

2392

# new config file, and saved state.

2393

# New config value takes precedence if it differs from old

2394

# config value, otherwise use saved state.

2395

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

2396

try:

2397

# For each value in new config, check if it

2398

# differs from the old config value (Except for

2399

# the "secret" attribute)

2400

if (name != "secret" and

2401

value != old_client_settings[client_name]

2402

[name]):

2403

client[name] = value

2404

except KeyError:

2405

pass

2406

2407

# Clients who has passed its expire date can still be

2408

# enabled if its last checker was successful. Clients

2409

# whose checker succeeded before we stored its state is

2410

# assumed to have successfully run all checkers during

2411

# downtime.

2412

if client["enabled"]:

2413

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

2414

if not client["last_checked_ok"]:

2415

logger.warning(

2416

"disabling client {0} - Client never "

2417

"performed a successful checker"

2418

.format(client_name))

2419

client["enabled"] = False

2420

elif client["last_checker_status"] != 0:

2421

logger.warning(

2422

"disabling client {0} - Client "

2423

"last checker failed with error code {1}"

2424

.format(client_name,

2425

client["last_checker_status"]))

2426

client["enabled"] = False

2427

else:

2428

client["expires"] = (datetime.datetime

2429

.utcnow()

2430

+ client["timeout"])

2431

logger.debug("Last checker succeeded,"

2432

" keeping {0} enabled"

2433

.format(client_name))

1975

2434

try:

1976

yield (name, special_settings[name]())

1977

except KeyError:

1978

yield (name, value)

1979

1980

tcp_server.clients.update(set(

1981

client_class(name = section,

1982

config= dict(client_config_items(

1983

client_config, section)))

1984

for section in client_config.sections()))

2435

client["secret"] = (

2436

pgp.decrypt(client["encrypted_secret"],

2437

client_settings[client_name]

2438

["secret"]))

2439

except PGPError:

2440

# If decryption fails, we use secret from new settings

2441

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

2442

.format(client_name))

2443

client["secret"] = (

2444

client_settings[client_name]["secret"])

2445

2446

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

2447

for client_name in (set(old_client_settings)

2448

- set(client_settings)):

2449

del clients_data[client_name]

2450

for client_name in (set(client_settings)

2451

- set(old_client_settings)):

2452

clients_data[client_name] = client_settings[client_name]

2453

2454

# Create all client objects

2455

for client_name, client in clients_data.iteritems():

2456

tcp_server.clients[client_name] = client_class(

2457

name = client_name, settings = client)

2458

1985

2459

if not tcp_server.clients:

1986

2460

logger.warning("No clients defined")

1987

2461

1988

2462

if not debug:

1989

2463

try:

1990

2464

with pidfile:

1998

2472

# "pidfile" was never created

1999

2473

pass

2000

2474

del pidfilename

2001

2002

2475

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

2003

2476

2004

2477

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

2005

2478

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

2006

2479

2007

2480

if use_dbus:

2008

class MandosDBusService(dbus.service.Object):

2481

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

2482

"se.bsnet.fukt.Mandos"})

2483

class MandosDBusService(DBusObjectWithProperties):

2009

2484

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

2010

2485

def __init__(self):

2011

2486

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

2012

_interface = "se.bsnet.fukt.Mandos"

2487

_interface = "se.recompile.Mandos"

2488

2489

@dbus_interface_annotations(_interface)

2490

def _foo(self):

2491

return { "org.freedesktop.DBus.Property"

2492

".EmitsChangedSignal":

2493

"false"}

2013

2494

2014

2495

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

2015

2496

def ClientAdded(self, objpath):

2030

2511

def GetAllClients(self):

2031

2512

"D-Bus method"

2032

2513

return dbus.Array(c.dbus_object_path

2033

for c in tcp_server.clients)

2514

for c in

2515

tcp_server.clients.itervalues())

2034

2516

2035

2517

@dbus.service.method(_interface,

2036

2518

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

2038

2520

"D-Bus method"

2039

2521

return dbus.Dictionary(

2040

2522

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

2041

for c in tcp_server.clients),

2523

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

2042

2524

signature="oa{sv}")

2043

2525

2044

2526

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

2045

2527

def RemoveClient(self, object_path):

2046

2528

"D-Bus method"

2047

for c in tcp_server.clients:

2529

for c in tcp_server.clients.itervalues():

2048

2530

if c.dbus_object_path == object_path:

2049

tcp_server.clients.remove(c)

2531

del tcp_server.clients[c.name]

2050

2532

c.remove_from_connection()

2051

2533

# Don't signal anything except ClientRemoved

2052

2534

c.disable(quiet=True)

2063

2545

"Cleanup function; run on exit"

2064

2546

service.cleanup()

2065

2547

2548

multiprocessing.active_children()

2549

if not (tcp_server.clients or client_settings):

2550

return

2551

2552

# Store client before exiting. Secrets are encrypted with key

2553

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

2554

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

2555

clients = {}

2556

with PGPEngine() as pgp:

2557

for client in tcp_server.clients.itervalues():

2558

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

2559

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

2560

key)

2561

client_dict = {}

2562

2563

# A list of attributes that can not be pickled

2564

# + secret.

2565

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

2566

"checker"))

2567

for name, typ in (inspect.getmembers

2568

(dbus.service.Object)):

2569

exclude.add(name)

2570

2571

client_dict["encrypted_secret"] = (client

2572

.encrypted_secret)

2573

for attr in client.client_structure:

2574

if attr not in exclude:

2575

client_dict[attr] = getattr(client, attr)

2576

2577

clients[client.name] = client_dict

2578

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

2579

2580

try:

2581

tempfd, tempname = tempfile.mkstemp(suffix=".pickle",

2582

prefix="clients-",

2583

dir=os.path.dirname

2584

(stored_state_path))

2585

with os.fdopen(tempfd, "wb") as stored_state:

2586

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

2587

os.rename(tempname, stored_state_path)

2588

except (IOError, OSError) as e:

2589

if not debug:

2590

try:

2591

os.remove(tempname)

2592

except NameError:

2593

pass

2594

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

2595

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

2596

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

2597

else:

2598

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

2599

exc_info=e)

2600

raise e

2601

2602

# Delete all clients, and settings from config

2066

2603

while tcp_server.clients:

2067

client = tcp_server.clients.pop()

2604

name, client = tcp_server.clients.popitem()

2068

2605

if use_dbus:

2069

2606

client.remove_from_connection()

2070

client.disable_hook = None

2071

2607

# Don't signal anything except ClientRemoved

2072

2608

client.disable(quiet=True)

2073

2609

if use_dbus:

2074

2610

# Emit D-Bus signal

2075

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2611

mandos_dbus_service.ClientRemoved(client

2612

.dbus_object_path,

2076

2613

client.name)

2614

client_settings.clear()

2077

2615

2078

2616

atexit.register(cleanup)

2079

2617

2080

for client in tcp_server.clients:

2618

for client in tcp_server.clients.itervalues():

2081

2619

if use_dbus:

2082

2620

# Emit D-Bus signal

2083

2621

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2084

client.enable()

2622

# Need to initiate checking of clients

2623

if client.enabled:

2624

client.init_checker()

2085

2625

2086

2626

tcp_server.enable()

2087

2627

tcp_server.server_activate()

2090

2630

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

2091

2631

if use_ipv6:

2092

2632

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

2093

" flowinfo %d, scope_id %d"

2094

% tcp_server.socket.getsockname())

2633

" flowinfo %d, scope_id %d",

2634

*tcp_server.socket.getsockname())

2095

2635

else: # IPv4

2096

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

2097

% tcp_server.socket.getsockname())

2636

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

2637

*tcp_server.socket.getsockname())

2098

2638

2099

2639

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

2100

2640

2103

2643

try:

2104

2644

service.activate()

2105

2645

except dbus.exceptions.DBusException as error:

2106

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

2646

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

2107

2647

cleanup()

2108

2648

sys.exit(1)

2109

2649

# End of Avahi example code

2116

2656

logger.debug("Starting main loop")

2117

2657

main_loop.run()

2118

2658

except AvahiError as error:

2119

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

2659

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

2120

2660

cleanup()

2121

2661

sys.exit(1)

2122

2662

except KeyboardInterrupt: