/mandos/trunk : revision 482

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

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#

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# Everything else is

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#

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

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

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# along with this program. If not, see

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

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#

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

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

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#

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from __future__ import (division, absolute_import, print_function,

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import functools

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import dbus

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import dbus.service

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import ctypes.util

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import xml.dom.minidom

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import inspect

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import GnuPGInterface

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.5.3"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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version = "1.3.0"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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

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"""init logger and add loglevel"""

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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

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pass

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class PGPEngine(object):

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

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def __init__(self):

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self.gnupg = GnuPGInterface.GnuPG()

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

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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

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'--quiet',

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'--no-use-agent'])

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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def encrypt(self, data, password):

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

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

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return ciphertext

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def decrypt(self, data, password):

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

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

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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decrypted_plaintext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return decrypted_plaintext

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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class AvahiError(Exception):

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

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

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

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

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

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

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self.name)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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def remove(self):

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

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if self.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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pass

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self.group = None

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match.remove()

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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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if self.group is None:

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self.group = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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self.server.EntryGroupNew()),

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.group = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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self.server.EntryGroupNew(),

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follow_name_owner_changes=True),

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self.entry_group_state_changed))

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'StateChanged', self .entry_group_state_changed))

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

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self.name, self.type)

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self.group.AddService(

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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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unicode(error))

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

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.format(error))

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raise AvahiGroupError("State changed: %s"

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% unicode(error))

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def cleanup(self):

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

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if self.group is not None:

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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException):

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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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avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

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if state in bad_states:

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if bad_states[state] is not None:

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if error is None:

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logger.error(bad_states[state])

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else:

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logger.error(bad_states[state] + ": %r", error)

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self.cleanup()

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if bad_states[state]:

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logger.error(bad_states[state])

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self.remove()

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elif state == avahi.SERVER_RUNNING:

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self.add()

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else:

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if error is None:

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

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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_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, -2 means no checker completed yet.

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

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last_enabled: datetime.datetime(); (UTC)

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

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D-Bus identifiers

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

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

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until this client is disabled

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extended_timeout: extra long timeout when secret has been sent

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runtime_expansions: Allowed attributes for runtime expansion.

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

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disabled, or None

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"""

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runtime_expansions = ("approval_delay", "approval_duration",

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

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

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

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

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"extended_timeout": "15m",

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"interval": "2m",

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

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"host": "",

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"approval_delay": "0s",

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"approval_duration": "1s",

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"approved_by_default": "True",

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"enabled": "True",

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}

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@staticmethod

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def _timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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def timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.timeout)

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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.extended_timeout)

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return self._timedelta_to_milliseconds(self.timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return timedelta_to_milliseconds(self.interval)

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return self._timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

467

return timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

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def config_parser(config):

471

"""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

475

value given the same arguments.

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"""

477

settings = {}

478

for client_name in config.sections():

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section = dict(config.items(client_name))

480

client = settings[client_name] = {}

481

482

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

483

# 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,

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"enabled")

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

490

.replace(" ", ""))

491

if "secret" in section:

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

493

elif "secfile" in section:

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

495

(section["secfile"])),

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"rb") as secfile:

497

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

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client["last_checked_ok"] = None

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client["last_checker_status"] = -2

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return settings

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

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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

320

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

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attribute."""

517

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self.name = name

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# adding all client settings

519

for setting, value in settings.iteritems():

520

setattr(self, setting, value)

521

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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"):

526

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

527

+ self.timeout)

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else:

529

self.last_enabled = None

530

self.expires = None

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323

if config is None:

324

config = {}

532

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

533

326

# Uppercase and remove spaces from fingerprint for later

534

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# comparison purposes with return value from the fingerprint()

535

328

# function

329

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

330

.replace(" ", ""))

536

331

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

537

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

538

datetime.datetime.utcnow())

539

540

# attributes specific for this server instance

332

if "secret" in config:

333

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

334

elif "secfile" in config:

335

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

336

(config["secfile"])),

337

"rb") as secfile:

338

self.secret = secfile.read()

339

else:

340

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

341

% self.name)

342

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

343

self.created = datetime.datetime.utcnow()

344

self.enabled = False

345

self.last_approval_request = None

346

self.last_enabled = None

347

self.last_checked_ok = None

348

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

349

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

350

self.disable_hook = disable_hook

541

351

self.checker = None

542

352

self.checker_initiator_tag = None

543

353

self.disable_initiator_tag = None

544

354

self.checker_callback_tag = None

355

self.checker_command = config["checker"]

545

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self.current_checker_command = None

546

self.approved = None

357

self.last_connect = None

358

self._approved = None

359

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

360

True)

547

361

self.approvals_pending = 0

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)

362

self.approval_delay = string_to_delta(

363

config["approval_delay"])

364

self.approval_duration = string_to_delta(

365

config["approval_duration"])

366

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

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# Send notice to process children that client state has changed

564

368

def send_changedstate(self):

565

with self.changedstate:

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self.changedstate.notify_all()

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self.changedstate.acquire()

370

self.changedstate.notify_all()

371

self.changedstate.release()

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def enable(self):

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

570

375

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

571

376

# Already enabled

572

377

return

573

378

self.send_changedstate()

574

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

575

self.enabled = True

576

379

self.last_enabled = datetime.datetime.utcnow()

577

self.init_checker()

380

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

381

# and every interval from then on.

382

self.checker_initiator_tag = (gobject.timeout_add

383

(self.interval_milliseconds(),

384

self.start_checker))

385

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

386

self.disable_initiator_tag = (gobject.timeout_add

387

(self.timeout_milliseconds(),

388

self.disable))

389

self.enabled = True

390

# Also start a new checker *right now*.

391

self.start_checker()

578

392

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def disable(self, quiet=True):

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394

"""Disable this client."""

587

401

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

588

402

gobject.source_remove(self.disable_initiator_tag)

589

403

self.disable_initiator_tag = None

590

self.expires = None

591

404

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

592

405

gobject.source_remove(self.checker_initiator_tag)

593

406

self.checker_initiator_tag = None

594

407

self.stop_checker()

408

if self.disable_hook:

409

self.disable_hook(self)

595

410

self.enabled = False

596

411

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

597

412

return False

598

413

599

414

def __del__(self):

415

self.disable_hook = None

600

416

self.disable()

601

417

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

615

418

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

616

419

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

617

420

self.checker_callback_tag = None

618

421

self.checker = None

619

422

if os.WIFEXITED(condition):

620

self.last_checker_status = os.WEXITSTATUS(condition)

621

if self.last_checker_status == 0:

423

exitstatus = os.WEXITSTATUS(condition)

424

if exitstatus == 0:

622

425

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

623

426

vars(self))

624

427

self.checked_ok()

626

429

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

627

430

vars(self))

628

431

else:

629

self.last_checker_status = -1

630

432

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

631

433

vars(self))

632

434

633

435

def checked_ok(self):

634

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

436

"""Bump up the timeout for this client.

437

438

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

439

alive and well.

440

"""

635

441

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."""

641

if timeout is None:

642

timeout = self.timeout

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

442

gobject.source_remove(self.disable_initiator_tag)

443

self.disable_initiator_tag = (gobject.timeout_add

444

(self.timeout_milliseconds(),

445

self.disable))

650

446

651

447

def need_approval(self):

652

448

self.last_approval_request = datetime.datetime.utcnow()

657

453

If a checker already exists, leave it running and do

658

454

nothing."""

659

455

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

660

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

661

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

662

# would inevitably timeout, since no checker would get a

663

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

456

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

457

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

458

# client would inevitably timeout, since no checker would get

459

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

664

460

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

665

461

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

666

462

# should be.

692

488

'replace')))

693

489

for attr in

694

490

self.runtime_expansions)

695

491

696

492

try:

697

493

command = self.checker_command % escaped_attrs

698

494

except TypeError as error:

699

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

700

self.checker_command, exc_info=error)

495

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

496

' %s', self.checker_command, error)

701

497

return True # Try again later

702

498

self.current_checker_command = command

703

499

try:

721

517

gobject.source_remove(self.checker_callback_tag)

722

518

self.checker_callback(pid, status, command)

723

519

except OSError as error:

724

logger.error("Failed to start subprocess",

725

exc_info=error)

520

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

521

error)

726

522

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

727

523

return True

728

524

735

531

return

736

532

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

737

533

try:

738

self.checker.terminate()

534

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

739

535

#time.sleep(0.5)

740

536

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

741

# self.checker.kill()

537

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

742

538

except OSError as error:

743

539

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

744

540

raise

745

541

self.checker = None

746

542

747

748

543

def dbus_service_property(dbus_interface, signature="v",

749

544

access="readwrite", byte_arrays=False):

750

545

"""Decorators for marking methods of a DBusObjectWithProperties to

761

556

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

762

557

if byte_arrays and signature != "ay":

763

558

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

764

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

559

" signature %r" % signature)

765

560

def decorator(func):

766

561

func._dbus_is_property = True

767

562

func._dbus_interface = dbus_interface

775

570

return decorator

776

571

777

572

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

815

573

class DBusPropertyException(dbus.exceptions.DBusException):

816

574

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

817

575

"""

833

591

834

592

class DBusObjectWithProperties(dbus.service.Object):

835

593

"""A D-Bus object with properties.

836

594

837

595

Classes inheriting from this can use the dbus_service_property

838

596

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

839

597

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

840

598

"""

841

599

842

600

@staticmethod

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)

601

def _is_dbus_property(obj):

602

return getattr(obj, "_dbus_is_property", False)

851

603

852

def _get_all_dbus_things(self, thing):

604

def _get_all_dbus_properties(self):

853

605

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

854

606

"""

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)))

607

return ((prop._dbus_name, prop)

608

for name, prop in

609

inspect.getmembers(self, self._is_dbus_property))

862

610

863

611

def _get_dbus_property(self, interface_name, property_name):

864

612

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

865

613

property with the specified name and interface.

866

614

"""

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

615

for name in (property_name,

616

property_name + "_dbus_property"):

617

prop = getattr(self, name, None)

618

if (prop is None

619

or not self._is_dbus_property(prop)

620

or prop._dbus_name != property_name

621

or (interface_name and prop._dbus_interface

622

and interface_name != prop._dbus_interface)):

623

continue

624

return prop

875

625

# No such property

876

626

raise DBusPropertyNotFound(self.dbus_object_path + ":"

877

627

+ interface_name + "."

902

652

# signatures other than "ay".

903

653

if prop._dbus_signature != "ay":

904

654

raise ValueError

905

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

906

for byte in value))

655

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

656

for byte in value))

907

657

prop(value)

908

658

909

659

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

911

661

def GetAll(self, interface_name):

912

662

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

913

663

standard.

914

664

915

665

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

916

666

"""

917

properties = {}

918

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

667

all = {}

668

for name, prop in self._get_all_dbus_properties():

919

669

if (interface_name

920

670

and interface_name != prop._dbus_interface):

921

671

# Interface non-empty but did not match

925

675

continue

926

676

value = prop()

927

677

if not hasattr(value, "variant_level"):

928

properties[name] = value

678

all[name] = value

929

679

continue

930

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

931

value.variant_level+1)

932

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

680

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

681

value.variant_level+1)

682

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

933

683

934

684

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

935

685

out_signature="s",

936

686

path_keyword='object_path',

937

687

connection_keyword='connection')

938

688

def Introspect(self, object_path, connection):

939

"""Overloading of standard D-Bus method.

940

941

Inserts property tags and interface annotation tags.

689

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

942

690

"""

943

691

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

944

692

connection)

951

699

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

952

700

return e

953

701

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

954

# Add property tags

955

702

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

956

703

for name, prop

957

in self._get_all_dbus_things("property")

704

in self._get_all_dbus_properties()

958

705

if prop._dbus_interface

959

706

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

960

707

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.from_iterable(

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)

992

708

# Add the names to the return values for the

993

709

# "org.freedesktop.DBus.Properties" methods

994

710

if (if_tag.getAttribute("name")

1009

725

except (AttributeError, xml.dom.DOMException,

1010

726

xml.parsers.expat.ExpatError) as error:

1011

727

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

1012

exc_info=error)

728

error)

1013

729

return xmlstring

1014

730

1015

731

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"})

1195

732

class ClientDBus(Client, DBusObjectWithProperties):

1196

733

"""A Client class using D-Bus

1197

734

1206

743

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

1207

744

1208

745

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

746

self._approvals_pending = 0

1209

747

self.bus = bus

1210

748

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

1211

749

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

1217

755

("/clients/" + client_object_name))

1218

756

DBusObjectWithProperties.__init__(self, self.bus,

1219

757

self.dbus_object_path)

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

758

759

def _get_approvals_pending(self):

760

return self._approvals_pending

761

def _set_approvals_pending(self, value):

762

old_value = self._approvals_pending

763

self._approvals_pending = value

764

bval = bool(value)

765

if (hasattr(self, "dbus_object_path")

766

and bval is not bool(old_value)):

767

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

768

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

769

dbus_bool)

770

771

approvals_pending = property(_get_approvals_pending,

772

_set_approvals_pending)

773

del _get_approvals_pending, _set_approvals_pending

774

775

@staticmethod

776

def _datetime_to_dbus(dt, variant_level=0):

777

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

778

return dbus.String(dt.isoformat(),

779

variant_level=variant_level)

780

781

def enable(self):

782

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

783

r = Client.enable(self)

784

if oldstate != self.enabled:

785

# Emit D-Bus signals

786

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

787

dbus.Boolean(True, variant_level=1))

788

self.PropertyChanged(

789

dbus.String("LastEnabled"),

790

self._datetime_to_dbus(self.last_enabled,

791

variant_level=1))

792

return r

793

794

def disable(self, quiet = False):

795

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

796

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

797

if not quiet and oldstate != self.enabled:

798

# Emit D-Bus signal

799

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

800

dbus.Boolean(False, variant_level=1))

801

return r

1288

802

1289

803

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

1290

804

try:

1299

813

*args, **kwargs):

1300

814

self.checker_callback_tag = None

1301

815

self.checker = None

816

# Emit D-Bus signal

817

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

818

dbus.Boolean(False, variant_level=1))

1302

819

if os.WIFEXITED(condition):

1303

820

exitstatus = os.WEXITSTATUS(condition)

1304

821

# Emit D-Bus signal

1314

831

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

1315

832

*args, **kwargs)

1316

833

834

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

835

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

836

# Emit D-Bus signal

837

self.PropertyChanged(

838

dbus.String("LastCheckedOK"),

839

(self._datetime_to_dbus(self.last_checked_ok,

840

variant_level=1)))

841

842

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

843

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

844

# Emit D-Bus signal

845

self.PropertyChanged(

846

dbus.String("LastApprovalRequest"),

847

(self._datetime_to_dbus(self.last_approval_request,

848

variant_level=1)))

849

return r

850

1317

851

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

1318

852

old_checker = self.checker

1319

853

if self.checker is not None:

1326

860

and old_checker_pid != self.checker.pid):

1327

861

# Emit D-Bus signal

1328

862

self.CheckerStarted(self.current_checker_command)

863

self.PropertyChanged(

864

dbus.String("CheckerRunning"),

865

dbus.Boolean(True, variant_level=1))

1329

866

return r

1330

867

868

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

869

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

870

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

871

if (old_checker is not None

872

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

873

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

874

dbus.Boolean(False, variant_level=1))

875

return r

876

1331

877

def _reset_approved(self):

1332

self.approved = None

878

self._approved = None

1333

879

return False

1334

880

1335

881

def approve(self, value=True):

1336

882

self.send_changedstate()

1337

self.approved = value

1338

gobject.timeout_add(timedelta_to_milliseconds

883

self._approved = value

884

gobject.timeout_add(self._timedelta_to_milliseconds

1339

885

(self.approval_duration),

1340

886

self._reset_approved)

1341

887

888

1342

889

## D-Bus methods, signals & properties

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"}

890

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

1351

891

1352

892

## Signals

1353

893

1439

979

if value is None: # get

1440

980

return dbus.Boolean(self.approved_by_default)

1441

981

self.approved_by_default = bool(value)

982

# Emit D-Bus signal

983

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

984

dbus.Boolean(value, variant_level=1))

1442

985

1443

986

# ApprovalDelay - property

1444

987

@dbus_service_property(_interface, signature="t",

1447

990

if value is None: # get

1448

991

return dbus.UInt64(self.approval_delay_milliseconds())

1449

992

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

993

# Emit D-Bus signal

994

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

995

dbus.UInt64(value, variant_level=1))

1450

996

1451

997

# ApprovalDuration - property

1452

998

@dbus_service_property(_interface, signature="t",

1453

999

access="readwrite")

1454

1000

def ApprovalDuration_dbus_property(self, value=None):

1455

1001

if value is None: # get

1456

return dbus.UInt64(timedelta_to_milliseconds(

1002

return dbus.UInt64(self._timedelta_to_milliseconds(

1457

1003

self.approval_duration))

1458

1004

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

1005

# Emit D-Bus signal

1006

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

1007

dbus.UInt64(value, variant_level=1))

1459

1008

1460

1009

# Name - property

1461

1010

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

1473

1022

def Host_dbus_property(self, value=None):

1474

1023

if value is None: # get

1475

1024

return dbus.String(self.host)

1476

self.host = unicode(value)

1025

self.host = value

1026

# Emit D-Bus signal

1027

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

1028

dbus.String(value, variant_level=1))

1477

1029

1478

1030

# Created - property

1479

1031

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

1480

1032

def Created_dbus_property(self):

1481

return datetime_to_dbus(self.created)

1033

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

1482

1034

1483

1035

# LastEnabled - property

1484

1036

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

1485

1037

def LastEnabled_dbus_property(self):

1486

return datetime_to_dbus(self.last_enabled)

1038

if self.last_enabled is None:

1039

return dbus.String("")

1040

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

1487

1041

1488

1042

# Enabled - property

1489

1043

@dbus_service_property(_interface, signature="b",

1503

1057

if value is not None:

1504

1058

self.checked_ok()

1505

1059

return

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)

1513

1514

# Expires - property

1515

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

1516

def Expires_dbus_property(self):

1517

return datetime_to_dbus(self.expires)

1060

if self.last_checked_ok is None:

1061

return dbus.String("")

1062

return dbus.String(self._datetime_to_dbus(self

1063

.last_checked_ok))

1518

1064

1519

1065

# LastApprovalRequest - property

1520

1066

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

1521

1067

def LastApprovalRequest_dbus_property(self):

1522

return datetime_to_dbus(self.last_approval_request)

1068

if self.last_approval_request is None:

1069

return dbus.String("")

1070

return dbus.String(self.

1071

_datetime_to_dbus(self

1072

.last_approval_request))

1523

1073

1524

1074

# Timeout - property

1525

1075

@dbus_service_property(_interface, signature="t",

1528

1078

if value is None: # get

1529

1079

return dbus.UInt64(self.timeout_milliseconds())

1530

1080

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

1081

# Emit D-Bus signal

1082

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

1083

dbus.UInt64(value, variant_level=1))

1084

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

1085

return

1531

1086

# Reschedule timeout

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

1551

# ExtendedTimeout - property

1552

@dbus_service_property(_interface, signature="t",

1553

access="readwrite")

1554

def ExtendedTimeout_dbus_property(self, value=None):

1555

if value is None: # get

1556

return dbus.UInt64(self.extended_timeout_milliseconds())

1557

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

1087

gobject.source_remove(self.disable_initiator_tag)

1088

self.disable_initiator_tag = None

1089

time_to_die = (self.

1090

_timedelta_to_milliseconds((self

1091

.last_checked_ok

1092

+ self.timeout)

1093

- datetime.datetime

1094

.utcnow()))

1095

if time_to_die <= 0:

1096

# The timeout has passed

1097

self.disable()

1098

else:

1099

self.disable_initiator_tag = (gobject.timeout_add

1100

(time_to_die, self.disable))

1558

1101

1559

1102

# Interval - property

1560

1103

@dbus_service_property(_interface, signature="t",

1563

1106

if value is None: # get

1564

1107

return dbus.UInt64(self.interval_milliseconds())

1565

1108

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

1109

# Emit D-Bus signal

1110

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

1111

dbus.UInt64(value, variant_level=1))

1566

1112

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

1567

1113

return

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

1114

# Reschedule checker run

1115

gobject.source_remove(self.checker_initiator_tag)

1116

self.checker_initiator_tag = (gobject.timeout_add

1117

(value, self.start_checker))

1118

self.start_checker() # Start one now, too

1119

1575

1120

# Checker - property

1576

1121

@dbus_service_property(_interface, signature="s",

1577

1122

access="readwrite")

1578

1123

def Checker_dbus_property(self, value=None):

1579

1124

if value is None: # get

1580

1125

return dbus.String(self.checker_command)

1581

self.checker_command = unicode(value)

1126

self.checker_command = value

1127

# Emit D-Bus signal

1128

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

1129

dbus.String(self.checker_command,

1130

variant_level=1))

1582

1131

1583

1132

# CheckerRunning - property

1584

1133

@dbus_service_property(_interface, signature="b",

1611

1160

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

1612

1161

if not self._pipe.recv():

1613

1162

raise KeyError()

1614

1163

1615

1164

def __getattribute__(self, name):

1616

if name == '_pipe':

1165

if(name == '_pipe'):

1617

1166

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

1618

1167

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

1619

1168

data = self._pipe.recv()

1624

1173

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

1625

1174

return self._pipe.recv()[1]

1626

1175

return func

1627

1176

1628

1177

def __setattr__(self, name, value):

1629

if name == '_pipe':

1178

if(name == '_pipe'):

1630

1179

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

1631

1180

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

1632

1181

1643

1192

unicode(self.client_address))

1644

1193

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

1645

1194

self.server.child_pipe.fileno())

1646

1195

1647

1196

session = (gnutls.connection

1648

1197

.ClientSession(self.request,

1649

1198

gnutls.connection

1650

1199

.X509Credentials()))

1651

1200

1652

1201

# Note: gnutls.connection.X509Credentials is really a

1653

1202

# generic GnuTLS certificate credentials object so long as

1654

1203

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

1655

1204

# here despite using OpenPGP certificates.

1656

1205

1657

1206

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

1658

1207

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

1659

1208

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

1665

1214

(gnutls.library.functions

1666

1215

.gnutls_priority_set_direct(session._c_object,

1667

1216

priority, None))

1668

1217

1669

1218

# Start communication using the Mandos protocol

1670

1219

# Get protocol number

1671

1220

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

1676

1225

except (ValueError, IndexError, RuntimeError) as error:

1677

1226

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

1678

1227

return

1679

1228

1680

1229

# Start GnuTLS connection

1681

1230

try:

1682

1231

session.handshake()

1686

1235

# established. Just abandon the request.

1687

1236

return

1688

1237

logger.debug("Handshake succeeded")

1689

1238

1690

1239

approval_required = False

1691

1240

try:

1692

1241

try:

1697

1246

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

1698

1247

return

1699

1248

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

1700

1249

1701

1250

try:

1702

1251

client = ProxyClient(child_pipe, fpr,

1703

1252

self.client_address)

1711

1260

1712

1261

while True:

1713

1262

if not client.enabled:

1714

logger.info("Client %s is disabled",

1263

logger.warning("Client %s is disabled",

1715

1264

client.name)

1716

1265

if self.server.use_dbus:

1717

1266

# Emit D-Bus signal

1718

client.Rejected("Disabled")

1267

client.Rejected("Disabled")

1719

1268

return

1720

1269

1721

if client.approved or not client.approval_delay:

1270

if client._approved or not client.approval_delay:

1722

1271

#We are approved or approval is disabled

1723

1272

break

1724

elif client.approved is None:

1273

elif client._approved is None:

1725

1274

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

1726

1275

client.name)

1727

1276

if self.server.use_dbus:

1738

1287

return

1739

1288

1740

1289

#wait until timeout or approved

1290

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

1741

1291

time = datetime.datetime.now()

1742

1292

client.changedstate.acquire()

1743

(client.changedstate.wait

1744

(float(client.timedelta_to_milliseconds(delay)

1745

/ 1000)))

1293

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

1746

1294

client.changedstate.release()

1747

1295

time2 = datetime.datetime.now()

1748

1296

if (time2 - time) >= delay:

1764

1312

try:

1765

1313

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

1766

1314

except gnutls.errors.GNUTLSError as error:

1767

logger.warning("gnutls send failed",

1768

exc_info=error)

1315

logger.warning("gnutls send failed")

1769

1316

return

1770

1317

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

1771

1318

sent, len(client.secret)

1772

1319

- (sent_size + sent))

1773

1320

sent_size += sent

1774

1321

1775

1322

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

1776

# bump the timeout using extended_timeout

1777

client.bump_timeout(client.extended_timeout)

1323

# bump the timeout as if seen

1324

client.checked_ok()

1778

1325

if self.server.use_dbus:

1779

1326

# Emit D-Bus signal

1780

1327

client.GotSecret()

1785

1332

try:

1786

1333

session.bye()

1787

1334

except gnutls.errors.GNUTLSError as error:

1788

logger.warning("GnuTLS bye failed",

1789

exc_info=error)

1335

logger.warning("GnuTLS bye failed")

1790

1336

1791

1337

@staticmethod

1792

1338

def peer_certificate(session):

1848

1394

# Convert the buffer to a Python bytestring

1849

1395

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

1850

1396

# Convert the bytestring to hexadecimal notation

1851

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

1397

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

1852

1398

return hex_fpr

1853

1399

1854

1400

1857

1403

def sub_process_main(self, request, address):

1858

1404

try:

1859

1405

self.finish_request(request, address)

1860

except Exception:

1406

except:

1861

1407

self.handle_error(request, address)

1862

1408

self.close_request(request)

1863

1409

1864

1410

def process_request(self, request, address):

1865

1411

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

1866

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

1867

args = (request,

1868

address))

1869

proc.start()

1870

return proc

1871

1412

multiprocessing.Process(target = self.sub_process_main,

1413

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

1872

1414

1873

1415

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1874

1416

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

1878

1420

This function creates a new pipe in self.pipe

1879

1421

"""

1880

1422

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1881

1882

proc = MultiprocessingMixIn.process_request(self, request,

1883

client_address)

1423

1424

super(MultiprocessingMixInWithPipe,

1425

self).process_request(request, client_address)

1884

1426

self.child_pipe.close()

1885

self.add_pipe(parent_pipe, proc)

1886

1887

def add_pipe(self, parent_pipe, proc):

1427

self.add_pipe(parent_pipe)

1428

1429

def add_pipe(self, parent_pipe):

1888

1430

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

1889

1431

raise NotImplementedError

1890

1432

1891

1892

1433

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1893

1434

socketserver.TCPServer, object):

1894

1435

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

1968

1509

self.enabled = False

1969

1510

self.clients = clients

1970

1511

if self.clients is None:

1971

self.clients = {}

1512

self.clients = set()

1972

1513

self.use_dbus = use_dbus

1973

1514

self.gnutls_priority = gnutls_priority

1974

1515

IPv6_TCPServer.__init__(self, server_address,

1978

1519

def server_activate(self):

1979

1520

if self.enabled:

1980

1521

return socketserver.TCPServer.server_activate(self)

1981

1982

1522

def enable(self):

1983

1523

self.enabled = True

1984

1985

def add_pipe(self, parent_pipe, proc):

1524

def add_pipe(self, parent_pipe):

1986

1525

# Call "handle_ipc" for both data and EOF events

1987

1526

gobject.io_add_watch(parent_pipe.fileno(),

1988

1527

gobject.IO_IN | gobject.IO_HUP,

1989

1528

functools.partial(self.handle_ipc,

1990

parent_pipe =

1991

parent_pipe,

1992

proc = proc))

1993

1529

parent_pipe = parent_pipe))

1530

1994

1531

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

1995

proc = None, client_object=None):

1996

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

1997

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

1998

# Wait for other process to exit

1999

proc.join()

1532

client_object=None):

1533

condition_names = {

1534

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

1535

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

1536

# blocking).

1537

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

1538

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

1539

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

1540

# broken, usually for pipes and

1541

# sockets).

1542

}

1543

conditions_string = ' | '.join(name

1544

for cond, name in

1545

condition_names.iteritems()

1546

if cond & condition)

1547

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

1548

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

2000

1549

return False

2001

1550

2002

1551

# Read a request from the child

2007

1556

fpr = request[1]

2008

1557

address = request[2]

2009

1558

2010

for c in self.clients.itervalues():

1559

for c in self.clients:

2011

1560

if c.fingerprint == fpr:

2012

1561

client = c

2013

1562

break

2014

1563

else:

2015

logger.info("Client not found for fingerprint: %s, ad"

2016

"dress: %s", fpr, address)

1564

logger.warning("Client not found for fingerprint: %s, ad"

1565

"dress: %s", fpr, address)

2017

1566

if self.use_dbus:

2018

1567

# Emit D-Bus signal

2019

mandos_dbus_service.ClientNotFound(fpr,

2020

address[0])

1568

mandos_dbus_service.ClientNotFound(fpr, address[0])

2021

1569

parent_pipe.send(False)

2022

1570

return False

2023

1571

2024

1572

gobject.io_add_watch(parent_pipe.fileno(),

2025

1573

gobject.IO_IN | gobject.IO_HUP,

2026

1574

functools.partial(self.handle_ipc,

2027

parent_pipe =

2028

parent_pipe,

2029

proc = proc,

2030

client_object =

2031

client))

1575

parent_pipe = parent_pipe,

1576

client_object = client))

2032

1577

parent_pipe.send(True)

2033

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

2034

# same fileno

1578

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

2035

1579

return False

2036

1580

if command == 'funcall':

2037

1581

funcname = request[1]

2038

1582

args = request[2]

2039

1583

kwargs = request[3]

2040

1584

2041

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

2042

funcname)(*args,

2043

**kwargs)))

2044

1585

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

1586

2045

1587

if command == 'getattr':

2046

1588

attrname = request[1]

2047

1589

if callable(client_object.__getattribute__(attrname)):

2048

1590

parent_pipe.send(('function',))

2049

1591

else:

2050

parent_pipe.send(('data', client_object

2051

.__getattribute__(attrname)))

1592

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

2052

1593

2053

1594

if command == 'setattr':

2054

1595

attrname = request[1]

2055

1596

value = request[2]

2056

1597

setattr(client_object, attrname, value)

2057

1598

2058

1599

return True

2059

1600

2060

1601

2090

1631

elif suffix == "w":

2091

1632

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

2092

1633

else:

2093

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

2094

.format(suffix))

1634

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

2095

1635

except (ValueError, IndexError) as e:

2096

1636

raise ValueError(*(e.args))

2097

1637

timevalue += delta

2098

1638

return timevalue

2099

1639

2100

1640

1641

def if_nametoindex(interface):

1642

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

1643

1644

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

1645

global if_nametoindex

1646

try:

1647

if_nametoindex = (ctypes.cdll.LoadLibrary

1648

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

1649

.if_nametoindex)

1650

except (OSError, AttributeError):

1651

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

1652

def if_nametoindex(interface):

1653

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

1654

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

1655

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

1656

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1657

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

1658

interface))

1659

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

1660

ifreq[16:20])[0]

1661

return interface_index

1662

return if_nametoindex(interface)

1663

1664

2101

1665

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

2102

1666

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

2103

1667

2111

1675

sys.exit()

2112

1676

if not noclose:

2113

1677

# Close all standard open file descriptors

2114

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

1678

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

2115

1679

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

2116

1680

raise OSError(errno.ENODEV,

2117

"{0} not a character device"

2118

.format(os.devnull))

1681

"%s not a character device"

1682

% os.path.devnull)

2119

1683

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

2120

1684

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

2121

1685

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

2130

1694

2131

1695

parser = argparse.ArgumentParser()

2132

1696

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

2133

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

1697

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

2134

1698

help="show version number and exit")

2135

1699

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

2136

1700

help="Bind to interface IF")

2158

1722

" system bus interface")

2159

1723

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

2160

1724

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

2161

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

2162

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

2163

" state")

2164

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

2165

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

2166

2167

1725

options = parser.parse_args()

2168

1726

2169

1727

if options.check:

2182

1740

"use_dbus": "True",

2183

1741

"use_ipv6": "True",

2184

1742

"debuglevel": "",

2185

"restore": "True",

2186

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

2187

1743

}

2188

1744

2189

1745

# Parse config file for server-global settings

2206

1762

# options, if set.

2207

1763

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

2208

1764

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

2209

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

2210

"statedir"):

1765

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

2211

1766

value = getattr(options, option)

2212

1767

if value is not None:

2213

1768

server_settings[option] = value

2225

1780

debuglevel = server_settings["debuglevel"]

2226

1781

use_dbus = server_settings["use_dbus"]

2227

1782

use_ipv6 = server_settings["use_ipv6"]

2228

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

2229

stored_state_file)

2230

2231

if debug:

2232

initlogger(debug, logging.DEBUG)

2233

else:

2234

if not debuglevel:

2235

initlogger(debug)

2236

else:

2237

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

2238

initlogger(debug, level)

2239

1783

2240

1784

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

2241

1785

syslogger.setFormatter(logging.Formatter

2242

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

2243

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

2244

.format(server_settings

2245

["servicename"])))

1786

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

1787

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

1788

% server_settings["servicename"]))

2246

1789

2247

1790

# Parse config file with clients

2248

client_config = configparser.SafeConfigParser(Client

2249

.client_defaults)

1791

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

1792

"interval": "5m",

1793

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

1794

"host": "",

1795

"approval_delay": "0s",

1796

"approval_duration": "1s",

1797

}

1798

client_config = configparser.SafeConfigParser(client_defaults)

2250

1799

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

2251

1800

"clients.conf"))

2252

1801

2266

1815

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

2267

1816

try:

2268

1817

pidfile = open(pidfilename, "w")

2269

except IOError as e:

2270

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

2271

exc_info=e)

1818

except IOError:

1819

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

2272

1820

2273

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

1821

try:

1822

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

1823

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

1824

except KeyError:

2274

1825

try:

2275

uid = pwd.getpwnam(name).pw_uid

2276

gid = pwd.getpwnam(name).pw_gid

2277

break

1826

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

1827

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

2278

1828

except KeyError:

2279

continue

2280

else:

2281

uid = 65534

2282

gid = 65534

1829

try:

1830

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

1831

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

1832

except KeyError:

1833

uid = 65534

1834

gid = 65534

2283

1835

try:

2284

1836

os.setgid(gid)

2285

1837

os.setuid(uid)

2287

1839

if error[0] != errno.EPERM:

2288

1840

raise error

2289

1841

1842

if not debug and not debuglevel:

1843

syslogger.setLevel(logging.WARNING)

1844

console.setLevel(logging.WARNING)

1845

if debuglevel:

1846

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

1847

syslogger.setLevel(level)

1848

console.setLevel(level)

1849

2290

1850

if debug:

2291

1851

# Enable all possible GnuTLS debugging

2292

1852

2302

1862

.gnutls_global_set_log_function(debug_gnutls))

2303

1863

2304

1864

# Redirect stdin so all checkers get /dev/null

2305

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

1865

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

2306

1866

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

2307

1867

if null > 2:

2308

1868

os.close(null)

1869

else:

1870

# No console logging

1871

logger.removeHandler(console)

2309

1872

2310

1873

# Need to fork before connecting to D-Bus

2311

1874

if not debug:

2312

1875

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

2313

1876

daemon()

2314

1877

2315

gobject.threads_init()

2316

2317

1878

global main_loop

2318

1879

# From the Avahi example code

2319

DBusGMainLoop(set_as_default=True)

1880

DBusGMainLoop(set_as_default=True )

2320

1881

main_loop = gobject.MainLoop()

2321

1882

bus = dbus.SystemBus()

2322

1883

# End of Avahi example code

2323

1884

if use_dbus:

2324

1885

try:

2325

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

1886

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

2326

1887

bus, do_not_queue=True)

2327

old_bus_name = (dbus.service.BusName

2328

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

2329

do_not_queue=True))

2330

1888

except dbus.exceptions.NameExistsException as e:

2331

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

1889

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

2332

1890

use_dbus = False

2333

1891

server_settings["use_dbus"] = False

2334

1892

tcp_server.use_dbus = False

2335

1893

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2336

service = AvahiServiceToSyslog(name =

2337

server_settings["servicename"],

2338

servicetype = "_mandos._tcp",

2339

protocol = protocol, bus = bus)

1894

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

1895

servicetype = "_mandos._tcp",

1896

protocol = protocol, bus = bus)

2340

1897

if server_settings["interface"]:

2341

1898

service.interface = (if_nametoindex

2342

1899

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

2347

1904

client_class = Client

2348

1905

if use_dbus:

2349

1906

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

2350

2351

client_settings = Client.config_parser(client_config)

2352

old_client_settings = {}

2353

clients_data = {}

2354

2355

# Get client data and settings from last running state.

2356

if server_settings["restore"]:

2357

try:

2358

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

2359

clients_data, old_client_settings = (pickle.load

2360

(stored_state))

2361

os.remove(stored_state_path)

2362

except IOError as e:

2363

if e.errno == errno.ENOENT:

2364

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

2365

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

2366

else:

2367

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

2368

exc_info=e)

2369

raise

2370

except EOFError as e:

2371

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

2372

"EOFError:", exc_info=e)

2373

2374

with PGPEngine() as pgp:

2375

for client_name, client in clients_data.iteritems():

2376

# Decide which value to use after restoring saved state.

2377

# We have three different values: Old config file,

2378

# new config file, and saved state.

2379

# New config value takes precedence if it differs from old

2380

# config value, otherwise use saved state.

2381

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

2382

try:

2383

# For each value in new config, check if it

2384

# differs from the old config value (Except for

2385

# the "secret" attribute)

2386

if (name != "secret" and

2387

value != old_client_settings[client_name]

2388

[name]):

2389

client[name] = value

2390

except KeyError:

2391

pass

2392

2393

# Clients who has passed its expire date can still be

2394

# enabled if its last checker was successful. Clients

2395

# whose checker succeeded before we stored its state is

2396

# assumed to have successfully run all checkers during

2397

# downtime.

2398

if client["enabled"]:

2399

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

2400

if not client["last_checked_ok"]:

2401

logger.warning(

2402

"disabling client {0} - Client never "

2403

"performed a successful checker"

2404

.format(client_name))

2405

client["enabled"] = False

2406

elif client["last_checker_status"] != 0:

2407

logger.warning(

2408

"disabling client {0} - Client "

2409

"last checker failed with error code {1}"

2410

.format(client_name,

2411

client["last_checker_status"]))

2412

client["enabled"] = False

2413

else:

2414

client["expires"] = (datetime.datetime

2415

.utcnow()

2416

+ client["timeout"])

2417

logger.debug("Last checker succeeded,"

2418

" keeping {0} enabled"

2419

.format(client_name))

1907

def client_config_items(config, section):

1908

special_settings = {

1909

"approved_by_default":

1910

lambda: config.getboolean(section,

1911

"approved_by_default"),

1912

}

1913

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

2420

1914

try:

2421

client["secret"] = (

2422

pgp.decrypt(client["encrypted_secret"],

2423

client_settings[client_name]

2424

["secret"]))

2425

except PGPError:

2426

# If decryption fails, we use secret from new settings

2427

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

2428

.format(client_name))

2429

client["secret"] = (

2430

client_settings[client_name]["secret"])

2431

2432

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

2433

for client_name in (set(old_client_settings)

2434

- set(client_settings)):

2435

del clients_data[client_name]

2436

for client_name in (set(client_settings)

2437

- set(old_client_settings)):

2438

clients_data[client_name] = client_settings[client_name]

2439

2440

# Create all client objects

2441

for client_name, client in clients_data.iteritems():

2442

tcp_server.clients[client_name] = client_class(

2443

name = client_name, settings = client)

2444

1915

yield (name, special_settings[name]())

1916

except KeyError:

1917

yield (name, value)

1918

1919

tcp_server.clients.update(set(

1920

client_class(name = section,

1921

config= dict(client_config_items(

1922

client_config, section)))

1923

for section in client_config.sections()))

2445

1924

if not tcp_server.clients:

2446

1925

logger.warning("No clients defined")

2447

1926

2448

1927

if not debug:

2449

1928

try:

2450

1929

with pidfile:

2458

1937

# "pidfile" was never created

2459

1938

pass

2460

1939

del pidfilename

1940

2461

1941

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

2462

1942

2463

1943

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

2464

1944

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

2465

1945

2466

1946

if use_dbus:

2467

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

2468

"se.bsnet.fukt.Mandos"})

2469

class MandosDBusService(DBusObjectWithProperties):

1947

class MandosDBusService(dbus.service.Object):

2470

1948

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

2471

1949

def __init__(self):

2472

1950

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

2473

_interface = "se.recompile.Mandos"

2474

2475

@dbus_interface_annotations(_interface)

2476

def _foo(self):

2477

return { "org.freedesktop.DBus.Property"

2478

".EmitsChangedSignal":

2479

"false"}

1951

_interface = "se.bsnet.fukt.Mandos"

2480

1952

2481

1953

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

2482

1954

def ClientAdded(self, objpath):

2497

1969

def GetAllClients(self):

2498

1970

"D-Bus method"

2499

1971

return dbus.Array(c.dbus_object_path

2500

for c in

2501

tcp_server.clients.itervalues())

1972

for c in tcp_server.clients)

2502

1973

2503

1974

@dbus.service.method(_interface,

2504

1975

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

2506

1977

"D-Bus method"

2507

1978

return dbus.Dictionary(

2508

1979

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

2509

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

1980

for c in tcp_server.clients),

2510

1981

signature="oa{sv}")

2511

1982

2512

1983

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

2513

1984

def RemoveClient(self, object_path):

2514

1985

"D-Bus method"

2515

for c in tcp_server.clients.itervalues():

1986

for c in tcp_server.clients:

2516

1987

if c.dbus_object_path == object_path:

2517

del tcp_server.clients[c.name]

1988

tcp_server.clients.remove(c)

2518

1989

c.remove_from_connection()

2519

1990

# Don't signal anything except ClientRemoved

2520

1991

c.disable(quiet=True)

2531

2002

"Cleanup function; run on exit"

2532

2003

service.cleanup()

2533

2004

2534

multiprocessing.active_children()

2535

if not (tcp_server.clients or client_settings):

2536

return

2537

2538

# Store client before exiting. Secrets are encrypted with key

2539

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

2540

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

2541

clients = {}

2542

with PGPEngine() as pgp:

2543

for client in tcp_server.clients.itervalues():

2544

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

2545

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

2546

key)

2547

client_dict = {}

2548

2549

# A list of attributes that can not be pickled

2550

# + secret.

2551

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

2552

"checker"))

2553

for name, typ in (inspect.getmembers

2554

(dbus.service.Object)):

2555

exclude.add(name)

2556

2557

client_dict["encrypted_secret"] = (client

2558

.encrypted_secret)

2559

for attr in client.client_structure:

2560

if attr not in exclude:

2561

client_dict[attr] = getattr(client, attr)

2562

2563

clients[client.name] = client_dict

2564

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

2565

2566

try:

2567

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

2568

prefix="clients-",

2569

dir=os.path.dirname

2570

(stored_state_path))

2571

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

2572

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

2573

os.rename(tempname, stored_state_path)

2574

except (IOError, OSError) as e:

2575

if not debug:

2576

try:

2577

os.remove(tempname)

2578

except NameError:

2579

pass

2580

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

2581

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

2582

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

2583

else:

2584

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

2585

exc_info=e)

2586

raise e

2587

2588

# Delete all clients, and settings from config

2589

2005

while tcp_server.clients:

2590

name, client = tcp_server.clients.popitem()

2006

client = tcp_server.clients.pop()

2591

2007

if use_dbus:

2592

2008

client.remove_from_connection()

2009

client.disable_hook = None

2593

2010

# Don't signal anything except ClientRemoved

2594

2011

client.disable(quiet=True)

2595

2012

if use_dbus:

2596

2013

# Emit D-Bus signal

2597

mandos_dbus_service.ClientRemoved(client

2598

.dbus_object_path,

2014

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2599

2015

client.name)

2600

client_settings.clear()

2601

2016

2602

2017

atexit.register(cleanup)

2603

2018

2604

for client in tcp_server.clients.itervalues():

2019

for client in tcp_server.clients:

2605

2020

if use_dbus:

2606

2021

# Emit D-Bus signal

2607

2022

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2608

# Need to initiate checking of clients

2609

if client.enabled:

2610

client.init_checker()

2023

client.enable()

2611

2024

2612

2025

tcp_server.enable()

2613

2026

tcp_server.server_activate()

2616

2029

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

2617

2030

if use_ipv6:

2618

2031

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

2619

" flowinfo %d, scope_id %d",

2620

*tcp_server.socket.getsockname())

2032

" flowinfo %d, scope_id %d"

2033

% tcp_server.socket.getsockname())

2621

2034

else: # IPv4

2622

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

2623

*tcp_server.socket.getsockname())

2035

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

2036

% tcp_server.socket.getsockname())

2624

2037

2625

2038

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

2626

2039

2629

2042

try:

2630

2043

service.activate()

2631

2044

except dbus.exceptions.DBusException as error:

2632

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

2045

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

2633

2046

cleanup()

2634

2047

sys.exit(1)

2635

2048

# End of Avahi example code

2642

2055

logger.debug("Starting main loop")

2643

2056

main_loop.run()

2644

2057

except AvahiError as error:

2645

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

2058

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

2646

2059

cleanup()

2647

2060

sys.exit(1)

2648

2061

except KeyboardInterrupt: