/mandos/trunk : revision 492

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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 = "1.3.1"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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

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"""init logger and add loglevel"""

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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

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pass

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class PGPEngine(object):

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

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def __init__(self):

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self.gnupg = GnuPGInterface.GnuPG()

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

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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

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'--quiet',

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'--no-use-agent'])

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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def encrypt(self, data, password):

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

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

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return ciphertext

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def decrypt(self, data, password):

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

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

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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decrypted_plaintext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return decrypted_plaintext

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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class AvahiError(Exception):

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

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

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

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

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

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

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self.name)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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def remove(self):

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

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self.entry_group_state_changed))

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'StateChanged', self .entry_group_state_changed))

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

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self.name, self.type)

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self.group.AddService(

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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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unicode(error))

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

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.format(error))

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raise AvahiGroupError("State changed: %s"

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% unicode(error))

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def cleanup(self):

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

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if self.group is not None:

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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException):

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dbus.exceptions.DBusException) as e:

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pass

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self.group = None

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self.remove()

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

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

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

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

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else:

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

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def activate(self):

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

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if self.server is None:

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self.server_state_changed)

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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):

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return timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

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def config_parser(config):

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

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

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with exceptions for any special settings as defined above.

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

475

value given the same arguments.

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"""

477

settings = {}

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for client_name in config.sections():

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section = dict(config.items(client_name))

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client = settings[client_name] = {}

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

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# Reformat values from string types to Python types

484

client["approved_by_default"] = config.getboolean(

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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:

492

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

493

elif "secfile" in section:

494

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

495

(section["secfile"])),

496

"rb") as secfile:

497

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

498

else:

499

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

500

.format(section))

501

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

502

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"])

507

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

512

client["last_checker_status"] = -2

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514

return settings

515

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

324

return self._timedelta_to_milliseconds(self.approval_delay)

325

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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

328

'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

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for setting, value in settings.iteritems():

520

setattr(self, setting, value)

521

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if self.enabled:

523

if not hasattr(self, "last_enabled"):

524

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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331

if config is None:

332

config = {}

532

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

533

334

# Uppercase and remove spaces from fingerprint for later

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# comparison purposes with return value from the fingerprint()

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# function

337

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

338

.replace(" ", ""))

536

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

537

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

538

datetime.datetime.utcnow())

539

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# attributes specific for this server instance

340

if "secret" in config:

341

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

342

elif "secfile" in config:

343

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

344

(config["secfile"])),

345

"rb") as secfile:

346

self.secret = secfile.read()

347

else:

348

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

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% self.name)

350

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

351

self.created = datetime.datetime.utcnow()

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self.enabled = False

353

self.last_approval_request = None

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self.last_enabled = None

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self.last_checked_ok = None

356

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

357

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

358

self.disable_hook = disable_hook

541

359

self.checker = None

542

360

self.checker_initiator_tag = None

543

361

self.disable_initiator_tag = None

544

362

self.checker_callback_tag = None

363

self.checker_command = config["checker"]

545

364

self.current_checker_command = None

546

self.approved = None

365

self.last_connect = None

366

self._approved = None

367

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

368

True)

547

369

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)

370

self.approval_delay = string_to_delta(

371

config["approval_delay"])

372

self.approval_duration = string_to_delta(

373

config["approval_duration"])

374

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

562

375

563

# Send notice to process children that client state has changed

564

376

def send_changedstate(self):

565

with self.changedstate:

566

self.changedstate.notify_all()

567

377

self.changedstate.acquire()

378

self.changedstate.notify_all()

379

self.changedstate.release()

380

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381

def enable(self):

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382

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

570

383

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

571

384

# Already enabled

572

385

return

573

386

self.send_changedstate()

574

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

575

self.enabled = True

576

387

self.last_enabled = datetime.datetime.utcnow()

577

self.init_checker()

388

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

389

# and every interval from then on.

390

self.checker_initiator_tag = (gobject.timeout_add

391

(self.interval_milliseconds(),

392

self.start_checker))

393

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

394

self.disable_initiator_tag = (gobject.timeout_add

395

(self.timeout_milliseconds(),

396

self.disable))

397

self.enabled = True

398

# Also start a new checker *right now*.

399

self.start_checker()

578

400

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def disable(self, quiet=True):

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"""Disable this client."""

587

409

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

588

410

gobject.source_remove(self.disable_initiator_tag)

589

411

self.disable_initiator_tag = None

590

self.expires = None

591

412

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

592

413

gobject.source_remove(self.checker_initiator_tag)

593

414

self.checker_initiator_tag = None

594

415

self.stop_checker()

416

if self.disable_hook:

417

self.disable_hook(self)

595

418

self.enabled = False

596

419

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

597

420

return False

598

421

599

422

def __del__(self):

423

self.disable_hook = None

600

424

self.disable()

601

425

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

426

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

616

427

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

617

428

self.checker_callback_tag = None

618

429

self.checker = None

619

430

if os.WIFEXITED(condition):

620

self.last_checker_status = os.WEXITSTATUS(condition)

621

if self.last_checker_status == 0:

431

exitstatus = os.WEXITSTATUS(condition)

432

if exitstatus == 0:

622

433

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

623

434

vars(self))

624

435

self.checked_ok()

626

437

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

627

438

vars(self))

628

439

else:

629

self.last_checker_status = -1

630

440

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

631

441

vars(self))

632

442

633

443

def checked_ok(self):

634

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

444

"""Bump up the timeout for this client.

445

446

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

447

alive and well.

448

"""

635

449

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

450

gobject.source_remove(self.disable_initiator_tag)

451

self.disable_initiator_tag = (gobject.timeout_add

452

(self.timeout_milliseconds(),

453

self.disable))

650

454

651

455

def need_approval(self):

652

456

self.last_approval_request = datetime.datetime.utcnow()

692

496

'replace')))

693

497

for attr in

694

498

self.runtime_expansions)

695

499

696

500

try:

697

501

command = self.checker_command % escaped_attrs

698

502

except TypeError as error:

699

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

700

self.checker_command, exc_info=error)

503

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

504

' %s', self.checker_command, error)

701

505

return True # Try again later

702

506

self.current_checker_command = command

703

507

try:

721

525

gobject.source_remove(self.checker_callback_tag)

722

526

self.checker_callback(pid, status, command)

723

527

except OSError as error:

724

logger.error("Failed to start subprocess",

725

exc_info=error)

528

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

529

error)

726

530

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

727

531

return True

728

532

735

539

return

736

540

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

737

541

try:

738

self.checker.terminate()

542

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

739

543

#time.sleep(0.5)

740

544

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

741

# self.checker.kill()

545

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

742

546

except OSError as error:

743

547

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

744

548

raise

745

549

self.checker = None

746

550

747

748

551

def dbus_service_property(dbus_interface, signature="v",

749

552

access="readwrite", byte_arrays=False):

750

553

"""Decorators for marking methods of a DBusObjectWithProperties to

761

564

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

762

565

if byte_arrays and signature != "ay":

763

566

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

764

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

567

" signature %r" % signature)

765

568

def decorator(func):

766

569

func._dbus_is_property = True

767

570

func._dbus_interface = dbus_interface

775

578

return decorator

776

579

777

580

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

581

class DBusPropertyException(dbus.exceptions.DBusException):

816

582

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

817

583

"""

833

599

834

600

class DBusObjectWithProperties(dbus.service.Object):

835

601

"""A D-Bus object with properties.

836

602

837

603

Classes inheriting from this can use the dbus_service_property

838

604

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

839

605

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

840

606

"""

841

607

842

608

@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)

609

def _is_dbus_property(obj):

610

return getattr(obj, "_dbus_is_property", False)

851

611

852

def _get_all_dbus_things(self, thing):

612

def _get_all_dbus_properties(self):

853

613

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

854

614

"""

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)))

615

return ((prop._dbus_name, prop)

616

for name, prop in

617

inspect.getmembers(self, self._is_dbus_property))

862

618

863

619

def _get_dbus_property(self, interface_name, property_name):

864

620

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

865

621

property with the specified name and interface.

866

622

"""

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

623

for name in (property_name,

624

property_name + "_dbus_property"):

625

prop = getattr(self, name, None)

626

if (prop is None

627

or not self._is_dbus_property(prop)

628

or prop._dbus_name != property_name

629

or (interface_name and prop._dbus_interface

630

and interface_name != prop._dbus_interface)):

631

continue

632

return prop

875

633

# No such property

876

634

raise DBusPropertyNotFound(self.dbus_object_path + ":"

877

635

+ interface_name + "."

902

660

# signatures other than "ay".

903

661

if prop._dbus_signature != "ay":

904

662

raise ValueError

905

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

906

for byte in value))

663

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

664

for byte in value))

907

665

prop(value)

908

666

909

667

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

911

669

def GetAll(self, interface_name):

912

670

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

913

671

standard.

914

672

915

673

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

916

674

"""

917

properties = {}

918

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

675

all = {}

676

for name, prop in self._get_all_dbus_properties():

919

677

if (interface_name

920

678

and interface_name != prop._dbus_interface):

921

679

# Interface non-empty but did not match

925

683

continue

926

684

value = prop()

927

685

if not hasattr(value, "variant_level"):

928

properties[name] = value

686

all[name] = value

929

687

continue

930

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

931

value.variant_level+1)

932

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

688

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

689

value.variant_level+1)

690

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

933

691

934

692

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

935

693

out_signature="s",

936

694

path_keyword='object_path',

937

695

connection_keyword='connection')

938

696

def Introspect(self, object_path, connection):

939

"""Overloading of standard D-Bus method.

940

941

Inserts property tags and interface annotation tags.

697

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

942

698

"""

943

699

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

944

700

connection)

951

707

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

952

708

return e

953

709

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

954

# Add property tags

955

710

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

956

711

for name, prop

957

in self._get_all_dbus_things("property")

712

in self._get_all_dbus_properties()

958

713

if prop._dbus_interface

959

714

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

960

715

if_tag.appendChild(tag)

961

# Add annotation tags

962

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

963

for tag in if_tag.getElementsByTagName(typ):

964

annots = dict()

965

for name, prop in (self.

966

_get_all_dbus_things(typ)):

967

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

968

and prop._dbus_interface

969

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

970

annots.update(getattr

971

(prop,

972

"_dbus_annotations",

973

{}))

974

for name, value in annots.iteritems():

975

ann_tag = document.createElement(

976

"annotation")

977

ann_tag.setAttribute("name", name)

978

ann_tag.setAttribute("value", value)

979

tag.appendChild(ann_tag)

980

# Add interface annotation tags

981

for annotation, value in dict(

982

itertools.chain(

983

*(annotations().iteritems()

984

for name, annotations in

985

self._get_all_dbus_things("interface")

986

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

987

))).iteritems():

988

ann_tag = document.createElement("annotation")

989

ann_tag.setAttribute("name", annotation)

990

ann_tag.setAttribute("value", value)

991

if_tag.appendChild(ann_tag)

992

716

# Add the names to the return values for the

993

717

# "org.freedesktop.DBus.Properties" methods

994

718

if (if_tag.getAttribute("name")

1009

733

except (AttributeError, xml.dom.DOMException,

1010

734

xml.parsers.expat.ExpatError) as error:

1011

735

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

1012

exc_info=error)

736

error)

1013

737

return xmlstring

1014

738

1015

739

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

740

class ClientDBus(Client, DBusObjectWithProperties):

1196

741

"""A Client class using D-Bus

1197

742

1206

751

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

1207

752

1208

753

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

754

self._approvals_pending = 0

1209

755

self.bus = bus

1210

756

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

1211

757

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

1217

763

("/clients/" + client_object_name))

1218

764

DBusObjectWithProperties.__init__(self, self.bus,

1219

765

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

766

767

def _get_approvals_pending(self):

768

return self._approvals_pending

769

def _set_approvals_pending(self, value):

770

old_value = self._approvals_pending

771

self._approvals_pending = value

772

bval = bool(value)

773

if (hasattr(self, "dbus_object_path")

774

and bval is not bool(old_value)):

775

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

776

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

777

dbus_bool)

778

779

approvals_pending = property(_get_approvals_pending,

780

_set_approvals_pending)

781

del _get_approvals_pending, _set_approvals_pending

782

783

@staticmethod

784

def _datetime_to_dbus(dt, variant_level=0):

785

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

786

return dbus.String(dt.isoformat(),

787

variant_level=variant_level)

788

789

def enable(self):

790

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

791

r = Client.enable(self)

792

if oldstate != self.enabled:

793

# Emit D-Bus signals

794

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

795

dbus.Boolean(True, variant_level=1))

796

self.PropertyChanged(

797

dbus.String("LastEnabled"),

798

self._datetime_to_dbus(self.last_enabled,

799

variant_level=1))

800

return r

801

802

def disable(self, quiet = False):

803

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

804

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

805

if not quiet and oldstate != self.enabled:

806

# Emit D-Bus signal

807

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

808

dbus.Boolean(False, variant_level=1))

809

return r

1288

810

1289

811

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

1290

812

try:

1299

821

*args, **kwargs):

1300

822

self.checker_callback_tag = None

1301

823

self.checker = None

824

# Emit D-Bus signal

825

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

826

dbus.Boolean(False, variant_level=1))

1302

827

if os.WIFEXITED(condition):

1303

828

exitstatus = os.WEXITSTATUS(condition)

1304

829

# Emit D-Bus signal

1314

839

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

1315

840

*args, **kwargs)

1316

841

842

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

843

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

844

# Emit D-Bus signal

845

self.PropertyChanged(

846

dbus.String("LastCheckedOK"),

847

(self._datetime_to_dbus(self.last_checked_ok,

848

variant_level=1)))

849

850

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

851

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

852

# Emit D-Bus signal

853

self.PropertyChanged(

854

dbus.String("LastApprovalRequest"),

855

(self._datetime_to_dbus(self.last_approval_request,

856

variant_level=1)))

857

return r

858

1317

859

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

1318

860

old_checker = self.checker

1319

861

if self.checker is not None:

1326

868

and old_checker_pid != self.checker.pid):

1327

869

# Emit D-Bus signal

1328

870

self.CheckerStarted(self.current_checker_command)

871

self.PropertyChanged(

872

dbus.String("CheckerRunning"),

873

dbus.Boolean(True, variant_level=1))

1329

874

return r

1330

875

876

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

877

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

878

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

879

if (old_checker is not None

880

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

881

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

882

dbus.Boolean(False, variant_level=1))

883

return r

884

1331

885

def _reset_approved(self):

1332

self.approved = None

886

self._approved = None

1333

887

return False

1334

888

1335

889

def approve(self, value=True):

1336

890

self.send_changedstate()

1337

self.approved = value

1338

gobject.timeout_add(timedelta_to_milliseconds

891

self._approved = value

892

gobject.timeout_add(self._timedelta_to_milliseconds

1339

893

(self.approval_duration),

1340

894

self._reset_approved)

1341

895

896

1342

897

## 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"}

898

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

1351

899

1352

900

## Signals

1353

901

1439

987

if value is None: # get

1440

988

return dbus.Boolean(self.approved_by_default)

1441

989

self.approved_by_default = bool(value)

990

# Emit D-Bus signal

991

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

992

dbus.Boolean(value, variant_level=1))

1442

993

1443

994

# ApprovalDelay - property

1444

995

@dbus_service_property(_interface, signature="t",

1447

998

if value is None: # get

1448

999

return dbus.UInt64(self.approval_delay_milliseconds())

1449

1000

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

1001

# Emit D-Bus signal

1002

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

1003

dbus.UInt64(value, variant_level=1))

1450

1004

1451

1005

# ApprovalDuration - property

1452

1006

@dbus_service_property(_interface, signature="t",

1453

1007

access="readwrite")

1454

1008

def ApprovalDuration_dbus_property(self, value=None):

1455

1009

if value is None: # get

1456

return dbus.UInt64(timedelta_to_milliseconds(

1010

return dbus.UInt64(self._timedelta_to_milliseconds(

1457

1011

self.approval_duration))

1458

1012

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

1013

# Emit D-Bus signal

1014

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

1015

dbus.UInt64(value, variant_level=1))

1459

1016

1460

1017

# Name - property

1461

1018

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

1473

1030

def Host_dbus_property(self, value=None):

1474

1031

if value is None: # get

1475

1032

return dbus.String(self.host)

1476

self.host = unicode(value)

1033

self.host = value

1034

# Emit D-Bus signal

1035

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

1036

dbus.String(value, variant_level=1))

1477

1037

1478

1038

# Created - property

1479

1039

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

1480

1040

def Created_dbus_property(self):

1481

return datetime_to_dbus(self.created)

1041

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

1482

1042

1483

1043

# LastEnabled - property

1484

1044

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

1485

1045

def LastEnabled_dbus_property(self):

1486

return datetime_to_dbus(self.last_enabled)

1046

if self.last_enabled is None:

1047

return dbus.String("")

1048

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

1487

1049

1488

1050

# Enabled - property

1489

1051

@dbus_service_property(_interface, signature="b",

1503

1065

if value is not None:

1504

1066

self.checked_ok()

1505

1067

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)

1068

if self.last_checked_ok is None:

1069

return dbus.String("")

1070

return dbus.String(self._datetime_to_dbus(self

1071

.last_checked_ok))

1518

1072

1519

1073

# LastApprovalRequest - property

1520

1074

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

1521

1075

def LastApprovalRequest_dbus_property(self):

1522

return datetime_to_dbus(self.last_approval_request)

1076

if self.last_approval_request is None:

1077

return dbus.String("")

1078

return dbus.String(self.

1079

_datetime_to_dbus(self

1080

.last_approval_request))

1523

1081

1524

1082

# Timeout - property

1525

1083

@dbus_service_property(_interface, signature="t",

1528

1086

if value is None: # get

1529

1087

return dbus.UInt64(self.timeout_milliseconds())

1530

1088

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

1089

# Emit D-Bus signal

1090

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

1091

dbus.UInt64(value, variant_level=1))

1092

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

1093

return

1531

1094

# 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)

1095

gobject.source_remove(self.disable_initiator_tag)

1096

self.disable_initiator_tag = None

1097

time_to_die = (self.

1098

_timedelta_to_milliseconds((self

1099

.last_checked_ok

1100

+ self.timeout)

1101

- datetime.datetime

1102

.utcnow()))

1103

if time_to_die <= 0:

1104

# The timeout has passed

1105

self.disable()

1106

else:

1107

self.disable_initiator_tag = (gobject.timeout_add

1108

(time_to_die, self.disable))

1558

1109

1559

1110

# Interval - property

1560

1111

@dbus_service_property(_interface, signature="t",

1563

1114

if value is None: # get

1564

1115

return dbus.UInt64(self.interval_milliseconds())

1565

1116

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

1117

# Emit D-Bus signal

1118

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

1119

dbus.UInt64(value, variant_level=1))

1566

1120

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

1567

1121

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

1122

# Reschedule checker run

1123

gobject.source_remove(self.checker_initiator_tag)

1124

self.checker_initiator_tag = (gobject.timeout_add

1125

(value, self.start_checker))

1126

self.start_checker() # Start one now, too

1127

1575

1128

# Checker - property

1576

1129

@dbus_service_property(_interface, signature="s",

1577

1130

access="readwrite")

1578

1131

def Checker_dbus_property(self, value=None):

1579

1132

if value is None: # get

1580

1133

return dbus.String(self.checker_command)

1581

self.checker_command = unicode(value)

1134

self.checker_command = value

1135

# Emit D-Bus signal

1136

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

1137

dbus.String(self.checker_command,

1138

variant_level=1))

1582

1139

1583

1140

# CheckerRunning - property

1584

1141

@dbus_service_property(_interface, signature="b",

1611

1168

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

1612

1169

if not self._pipe.recv():

1613

1170

raise KeyError()

1614

1171

1615

1172

def __getattribute__(self, name):

1616

if name == '_pipe':

1173

if(name == '_pipe'):

1617

1174

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

1618

1175

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

1619

1176

data = self._pipe.recv()

1624

1181

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

1625

1182

return self._pipe.recv()[1]

1626

1183

return func

1627

1184

1628

1185

def __setattr__(self, name, value):

1629

if name == '_pipe':

1186

if(name == '_pipe'):

1630

1187

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

1631

1188

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

1632

1189

1643

1200

unicode(self.client_address))

1644

1201

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

1645

1202

self.server.child_pipe.fileno())

1646

1203

1647

1204

session = (gnutls.connection

1648

1205

.ClientSession(self.request,

1649

1206

gnutls.connection

1650

1207

.X509Credentials()))

1651

1208

1652

1209

# Note: gnutls.connection.X509Credentials is really a

1653

1210

# generic GnuTLS certificate credentials object so long as

1654

1211

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

1655

1212

# here despite using OpenPGP certificates.

1656

1213

1657

1214

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

1658

1215

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

1659

1216

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

1665

1222

(gnutls.library.functions

1666

1223

.gnutls_priority_set_direct(session._c_object,

1667

1224

priority, None))

1668

1225

1669

1226

# Start communication using the Mandos protocol

1670

1227

# Get protocol number

1671

1228

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

1676

1233

except (ValueError, IndexError, RuntimeError) as error:

1677

1234

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

1678

1235

return

1679

1236

1680

1237

# Start GnuTLS connection

1681

1238

try:

1682

1239

session.handshake()

1686

1243

# established. Just abandon the request.

1687

1244

return

1688

1245

logger.debug("Handshake succeeded")

1689

1246

1690

1247

approval_required = False

1691

1248

try:

1692

1249

try:

1697

1254

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

1698

1255

return

1699

1256

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

1700

1257

1701

1258

try:

1702

1259

client = ProxyClient(child_pipe, fpr,

1703

1260

self.client_address)

1715

1272

client.name)

1716

1273

if self.server.use_dbus:

1717

1274

# Emit D-Bus signal

1718

client.Rejected("Disabled")

1275

client.Rejected("Disabled")

1719

1276

return

1720

1277

1721

if client.approved or not client.approval_delay:

1278

if client._approved or not client.approval_delay:

1722

1279

#We are approved or approval is disabled

1723

1280

break

1724

elif client.approved is None:

1281

elif client._approved is None:

1725

1282

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

1726

1283

client.name)

1727

1284

if self.server.use_dbus:

1738

1295

return

1739

1296

1740

1297

#wait until timeout or approved

1298

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

1741

1299

time = datetime.datetime.now()

1742

1300

client.changedstate.acquire()

1743

(client.changedstate.wait

1744

(float(client.timedelta_to_milliseconds(delay)

1745

/ 1000)))

1301

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

1746

1302

client.changedstate.release()

1747

1303

time2 = datetime.datetime.now()

1748

1304

if (time2 - time) >= delay:

1764

1320

try:

1765

1321

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

1766

1322

except gnutls.errors.GNUTLSError as error:

1767

logger.warning("gnutls send failed",

1768

exc_info=error)

1323

logger.warning("gnutls send failed")

1769

1324

return

1770

1325

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

1771

1326

sent, len(client.secret)

1772

1327

- (sent_size + sent))

1773

1328

sent_size += sent

1774

1329

1775

1330

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

1776

# bump the timeout using extended_timeout

1777

client.bump_timeout(client.extended_timeout)

1331

# bump the timeout as if seen

1332

client.checked_ok()

1778

1333

if self.server.use_dbus:

1779

1334

# Emit D-Bus signal

1780

1335

client.GotSecret()

1785

1340

try:

1786

1341

session.bye()

1787

1342

except gnutls.errors.GNUTLSError as error:

1788

logger.warning("GnuTLS bye failed",

1789

exc_info=error)

1343

logger.warning("GnuTLS bye failed")

1790

1344

1791

1345

@staticmethod

1792

1346

def peer_certificate(session):

1848

1402

# Convert the buffer to a Python bytestring

1849

1403

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

1850

1404

# Convert the bytestring to hexadecimal notation

1851

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

1405

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

1852

1406

return hex_fpr

1853

1407

1854

1408

1857

1411

def sub_process_main(self, request, address):

1858

1412

try:

1859

1413

self.finish_request(request, address)

1860

except Exception:

1414

except:

1861

1415

self.handle_error(request, address)

1862

1416

self.close_request(request)

1863

1417

1864

1418

def process_request(self, request, address):

1865

1419

"""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

1420

multiprocessing.Process(target = self.sub_process_main,

1421

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

1872

1422

1873

1423

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1874

1424

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

1878

1428

This function creates a new pipe in self.pipe

1879

1429

"""

1880

1430

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1881

1882

proc = MultiprocessingMixIn.process_request(self, request,

1883

client_address)

1431

1432

super(MultiprocessingMixInWithPipe,

1433

self).process_request(request, client_address)

1884

1434

self.child_pipe.close()

1885

self.add_pipe(parent_pipe, proc)

1886

1887

def add_pipe(self, parent_pipe, proc):

1435

self.add_pipe(parent_pipe)

1436

1437

def add_pipe(self, parent_pipe):

1888

1438

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

1889

1439

raise NotImplementedError

1890

1440

1891

1892

1441

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1893

1442

socketserver.TCPServer, object):

1894

1443

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

1968

1517

self.enabled = False

1969

1518

self.clients = clients

1970

1519

if self.clients is None:

1971

self.clients = {}

1520

self.clients = set()

1972

1521

self.use_dbus = use_dbus

1973

1522

self.gnutls_priority = gnutls_priority

1974

1523

IPv6_TCPServer.__init__(self, server_address,

1978

1527

def server_activate(self):

1979

1528

if self.enabled:

1980

1529

return socketserver.TCPServer.server_activate(self)

1981

1982

1530

def enable(self):

1983

1531

self.enabled = True

1984

1985

def add_pipe(self, parent_pipe, proc):

1532

def add_pipe(self, parent_pipe):

1986

1533

# Call "handle_ipc" for both data and EOF events

1987

1534

gobject.io_add_watch(parent_pipe.fileno(),

1988

1535

gobject.IO_IN | gobject.IO_HUP,

1989

1536

functools.partial(self.handle_ipc,

1990

parent_pipe =

1991

parent_pipe,

1992

proc = proc))

1993

1537

parent_pipe = parent_pipe))

1538

1994

1539

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

1995

proc = None, client_object=None):

1540

client_object=None):

1996

1541

condition_names = {

1997

1542

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

1998

1543

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

2007

1552

for cond, name in

2008

1553

condition_names.iteritems()

2009

1554

if cond & condition)

2010

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

1555

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

2011

1556

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

2012

# Wait for other process to exit

2013

proc.join()

2014

1557

return False

2015

1558

2016

1559

# Read a request from the child

2021

1564

fpr = request[1]

2022

1565

address = request[2]

2023

1566

2024

for c in self.clients.itervalues():

1567

for c in self.clients:

2025

1568

if c.fingerprint == fpr:

2026

1569

client = c

2027

1570

break

2030

1573

"dress: %s", fpr, address)

2031

1574

if self.use_dbus:

2032

1575

# Emit D-Bus signal

2033

mandos_dbus_service.ClientNotFound(fpr,

2034

address[0])

1576

mandos_dbus_service.ClientNotFound(fpr, address[0])

2035

1577

parent_pipe.send(False)

2036

1578

return False

2037

1579

2038

1580

gobject.io_add_watch(parent_pipe.fileno(),

2039

1581

gobject.IO_IN | gobject.IO_HUP,

2040

1582

functools.partial(self.handle_ipc,

2041

parent_pipe =

2042

parent_pipe,

2043

proc = proc,

2044

client_object =

2045

client))

1583

parent_pipe = parent_pipe,

1584

client_object = client))

2046

1585

parent_pipe.send(True)

2047

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

2048

# same fileno

1586

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

2049

1587

return False

2050

1588

if command == 'funcall':

2051

1589

funcname = request[1]

2052

1590

args = request[2]

2053

1591

kwargs = request[3]

2054

1592

2055

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

2056

funcname)(*args,

2057

**kwargs)))

2058

1593

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

1594

2059

1595

if command == 'getattr':

2060

1596

attrname = request[1]

2061

1597

if callable(client_object.__getattribute__(attrname)):

2062

1598

parent_pipe.send(('function',))

2063

1599

else:

2064

parent_pipe.send(('data', client_object

2065

.__getattribute__(attrname)))

1600

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

2066

1601

2067

1602

if command == 'setattr':

2068

1603

attrname = request[1]

2069

1604

value = request[2]

2070

1605

setattr(client_object, attrname, value)

2071

1606

2072

1607

return True

2073

1608

2074

1609

2104

1639

elif suffix == "w":

2105

1640

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

2106

1641

else:

2107

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

2108

.format(suffix))

1642

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

2109

1643

except (ValueError, IndexError) as e:

2110

1644

raise ValueError(*(e.args))

2111

1645

timevalue += delta

2112

1646

return timevalue

2113

1647

2114

1648

1649

def if_nametoindex(interface):

1650

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

1651

1652

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

1653

global if_nametoindex

1654

try:

1655

if_nametoindex = (ctypes.cdll.LoadLibrary

1656

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

1657

.if_nametoindex)

1658

except (OSError, AttributeError):

1659

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

1660

def if_nametoindex(interface):

1661

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

1662

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

1663

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

1664

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1665

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

1666

interface))

1667

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

1668

ifreq[16:20])[0]

1669

return interface_index

1670

return if_nametoindex(interface)

1671

1672

2115

1673

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

2116

1674

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

2117

1675

2125

1683

sys.exit()

2126

1684

if not noclose:

2127

1685

# Close all standard open file descriptors

2128

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

1686

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

2129

1687

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

2130

1688

raise OSError(errno.ENODEV,

2131

"{0} not a character device"

2132

.format(os.devnull))

1689

"%s not a character device"

1690

% os.path.devnull)

2133

1691

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

2134

1692

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

2135

1693

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

2144

1702

2145

1703

parser = argparse.ArgumentParser()

2146

1704

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

2147

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

1705

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

2148

1706

help="show version number and exit")

2149

1707

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

2150

1708

help="Bind to interface IF")

2172

1730

" system bus interface")

2173

1731

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

2174

1732

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

2175

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

2176

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

2177

" state")

2178

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

2179

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

2180

2181

1733

options = parser.parse_args()

2182

1734

2183

1735

if options.check:

2196

1748

"use_dbus": "True",

2197

1749

"use_ipv6": "True",

2198

1750

"debuglevel": "",

2199

"restore": "True",

2200

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

2201

1751

}

2202

1752

2203

1753

# Parse config file for server-global settings

2220

1770

# options, if set.

2221

1771

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

2222

1772

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

2223

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

2224

"statedir"):

1773

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

2225

1774

value = getattr(options, option)

2226

1775

if value is not None:

2227

1776

server_settings[option] = value

2239

1788

debuglevel = server_settings["debuglevel"]

2240

1789

use_dbus = server_settings["use_dbus"]

2241

1790

use_ipv6 = server_settings["use_ipv6"]

2242

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

2243

stored_state_file)

2244

2245

if debug:

2246

initlogger(debug, logging.DEBUG)

2247

else:

2248

if not debuglevel:

2249

initlogger(debug)

2250

else:

2251

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

2252

initlogger(debug, level)

2253

1791

2254

1792

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

2255

1793

syslogger.setFormatter(logging.Formatter

2256

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

2257

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

2258

.format(server_settings

2259

["servicename"])))

1794

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

1795

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

1796

% server_settings["servicename"]))

2260

1797

2261

1798

# Parse config file with clients

2262

client_config = configparser.SafeConfigParser(Client

2263

.client_defaults)

1799

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

1800

"interval": "5m",

1801

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

1802

"host": "",

1803

"approval_delay": "0s",

1804

"approval_duration": "1s",

1805

}

1806

client_config = configparser.SafeConfigParser(client_defaults)

2264

1807

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

2265

1808

"clients.conf"))

2266

1809

2280

1823

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

2281

1824

try:

2282

1825

pidfile = open(pidfilename, "w")

2283

except IOError as e:

2284

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

2285

exc_info=e)

1826

except IOError:

1827

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

2286

1828

2287

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

1829

try:

1830

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

1831

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

1832

except KeyError:

2288

1833

try:

2289

uid = pwd.getpwnam(name).pw_uid

2290

gid = pwd.getpwnam(name).pw_gid

2291

break

1834

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

1835

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

2292

1836

except KeyError:

2293

continue

2294

else:

2295

uid = 65534

2296

gid = 65534

1837

try:

1838

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

1839

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

1840

except KeyError:

1841

uid = 65534

1842

gid = 65534

2297

1843

try:

2298

1844

os.setgid(gid)

2299

1845

os.setuid(uid)

2301

1847

if error[0] != errno.EPERM:

2302

1848

raise error

2303

1849

1850

if not debug and not debuglevel:

1851

syslogger.setLevel(logging.WARNING)

1852

console.setLevel(logging.WARNING)

1853

if debuglevel:

1854

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

1855

syslogger.setLevel(level)

1856

console.setLevel(level)

1857

2304

1858

if debug:

2305

1859

# Enable all possible GnuTLS debugging

2306

1860

2316

1870

.gnutls_global_set_log_function(debug_gnutls))

2317

1871

2318

1872

# Redirect stdin so all checkers get /dev/null

2319

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

1873

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

2320

1874

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

2321

1875

if null > 2:

2322

1876

os.close(null)

1877

else:

1878

# No console logging

1879

logger.removeHandler(console)

2323

1880

2324

1881

# Need to fork before connecting to D-Bus

2325

1882

if not debug:

2326

1883

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

2327

1884

daemon()

2328

1885

2329

gobject.threads_init()

2330

2331

1886

global main_loop

2332

1887

# From the Avahi example code

2333

DBusGMainLoop(set_as_default=True)

1888

DBusGMainLoop(set_as_default=True )

2334

1889

main_loop = gobject.MainLoop()

2335

1890

bus = dbus.SystemBus()

2336

1891

# End of Avahi example code

2337

1892

if use_dbus:

2338

1893

try:

2339

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

1894

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

2340

1895

bus, do_not_queue=True)

2341

old_bus_name = (dbus.service.BusName

2342

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

2343

do_not_queue=True))

2344

1896

except dbus.exceptions.NameExistsException as e:

2345

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

1897

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

2346

1898

use_dbus = False

2347

1899

server_settings["use_dbus"] = False

2348

1900

tcp_server.use_dbus = False

2349

1901

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2350

service = AvahiServiceToSyslog(name =

2351

server_settings["servicename"],

2352

servicetype = "_mandos._tcp",

2353

protocol = protocol, bus = bus)

1902

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

1903

servicetype = "_mandos._tcp",

1904

protocol = protocol, bus = bus)

2354

1905

if server_settings["interface"]:

2355

1906

service.interface = (if_nametoindex

2356

1907

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

2361

1912

client_class = Client

2362

1913

if use_dbus:

2363

1914

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

2364

2365

client_settings = Client.config_parser(client_config)

2366

old_client_settings = {}

2367

clients_data = {}

2368

2369

# Get client data and settings from last running state.

2370

if server_settings["restore"]:

2371

try:

2372

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

2373

clients_data, old_client_settings = (pickle.load

2374

(stored_state))

2375

os.remove(stored_state_path)

2376

except IOError as e:

2377

if e.errno == errno.ENOENT:

2378

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

2379

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

2380

else:

2381

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

2382

exc_info=e)

2383

raise

2384

except EOFError as e:

2385

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

2386

"EOFError:", exc_info=e)

2387

2388

with PGPEngine() as pgp:

2389

for client_name, client in clients_data.iteritems():

2390

# Decide which value to use after restoring saved state.

2391

# We have three different values: Old config file,

2392

# new config file, and saved state.

2393

# New config value takes precedence if it differs from old

2394

# config value, otherwise use saved state.

2395

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

2396

try:

2397

# For each value in new config, check if it

2398

# differs from the old config value (Except for

2399

# the "secret" attribute)

2400

if (name != "secret" and

2401

value != old_client_settings[client_name]

2402

[name]):

2403

client[name] = value

2404

except KeyError:

2405

pass

2406

2407

# Clients who has passed its expire date can still be

2408

# enabled if its last checker was successful. Clients

2409

# whose checker succeeded before we stored its state is

2410

# assumed to have successfully run all checkers during

2411

# downtime.

2412

if client["enabled"]:

2413

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

2414

if not client["last_checked_ok"]:

2415

logger.warning(

2416

"disabling client {0} - Client never "

2417

"performed a successful checker"

2418

.format(client_name))

2419

client["enabled"] = False

2420

elif client["last_checker_status"] != 0:

2421

logger.warning(

2422

"disabling client {0} - Client "

2423

"last checker failed with error code {1}"

2424

.format(client_name,

2425

client["last_checker_status"]))

2426

client["enabled"] = False

2427

else:

2428

client["expires"] = (datetime.datetime

2429

.utcnow()

2430

+ client["timeout"])

2431

logger.debug("Last checker succeeded,"

2432

" keeping {0} enabled"

2433

.format(client_name))

1915

def client_config_items(config, section):

1916

special_settings = {

1917

"approved_by_default":

1918

lambda: config.getboolean(section,

1919

"approved_by_default"),

1920

}

1921

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

2434

1922

try:

2435

client["secret"] = (

2436

pgp.decrypt(client["encrypted_secret"],

2437

client_settings[client_name]

2438

["secret"]))

2439

except PGPError:

2440

# If decryption fails, we use secret from new settings

2441

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

2442

.format(client_name))

2443

client["secret"] = (

2444

client_settings[client_name]["secret"])

2445

2446

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

2447

for client_name in (set(old_client_settings)

2448

- set(client_settings)):

2449

del clients_data[client_name]

2450

for client_name in (set(client_settings)

2451

- set(old_client_settings)):

2452

clients_data[client_name] = client_settings[client_name]

2453

2454

# Create all client objects

2455

for client_name, client in clients_data.iteritems():

2456

tcp_server.clients[client_name] = client_class(

2457

name = client_name, settings = client)

2458

1923

yield (name, special_settings[name]())

1924

except KeyError:

1925

yield (name, value)

1926

1927

tcp_server.clients.update(set(

1928

client_class(name = section,

1929

config= dict(client_config_items(

1930

client_config, section)))

1931

for section in client_config.sections()))

2459

1932

if not tcp_server.clients:

2460

1933

logger.warning("No clients defined")

2461

1934

2462

1935

if not debug:

2463

1936

try:

2464

1937

with pidfile:

2472

1945

# "pidfile" was never created

2473

1946

pass

2474

1947

del pidfilename

1948

2475

1949

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

2476

1950

2477

1951

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

2478

1952

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

2479

1953

2480

1954

if use_dbus:

2481

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

2482

"se.bsnet.fukt.Mandos"})

2483

class MandosDBusService(DBusObjectWithProperties):

1955

class MandosDBusService(dbus.service.Object):

2484

1956

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

2485

1957

def __init__(self):

2486

1958

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

2487

_interface = "se.recompile.Mandos"

2488

2489

@dbus_interface_annotations(_interface)

2490

def _foo(self):

2491

return { "org.freedesktop.DBus.Property"

2492

".EmitsChangedSignal":

2493

"false"}

1959

_interface = "se.bsnet.fukt.Mandos"

2494

1960

2495

1961

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

2496

1962

def ClientAdded(self, objpath):

2511

1977

def GetAllClients(self):

2512

1978

"D-Bus method"

2513

1979

return dbus.Array(c.dbus_object_path

2514

for c in

2515

tcp_server.clients.itervalues())

1980

for c in tcp_server.clients)

2516

1981

2517

1982

@dbus.service.method(_interface,

2518

1983

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

2520

1985

"D-Bus method"

2521

1986

return dbus.Dictionary(

2522

1987

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

2523

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

1988

for c in tcp_server.clients),

2524

1989

signature="oa{sv}")

2525

1990

2526

1991

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

2527

1992

def RemoveClient(self, object_path):

2528

1993

"D-Bus method"

2529

for c in tcp_server.clients.itervalues():

1994

for c in tcp_server.clients:

2530

1995

if c.dbus_object_path == object_path:

2531

del tcp_server.clients[c.name]

1996

tcp_server.clients.remove(c)

2532

1997

c.remove_from_connection()

2533

1998

# Don't signal anything except ClientRemoved

2534

1999

c.disable(quiet=True)

2545

2010

"Cleanup function; run on exit"

2546

2011

service.cleanup()

2547

2012

2548

multiprocessing.active_children()

2549

if not (tcp_server.clients or client_settings):

2550

return

2551

2552

# Store client before exiting. Secrets are encrypted with key

2553

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

2554

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

2555

clients = {}

2556

with PGPEngine() as pgp:

2557

for client in tcp_server.clients.itervalues():

2558

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

2559

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

2560

key)

2561

client_dict = {}

2562

2563

# A list of attributes that can not be pickled

2564

# + secret.

2565

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

2566

"checker"))

2567

for name, typ in (inspect.getmembers

2568

(dbus.service.Object)):

2569

exclude.add(name)

2570

2571

client_dict["encrypted_secret"] = (client

2572

.encrypted_secret)

2573

for attr in client.client_structure:

2574

if attr not in exclude:

2575

client_dict[attr] = getattr(client, attr)

2576

2577

clients[client.name] = client_dict

2578

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

2579

2580

try:

2581

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

2582

prefix="clients-",

2583

dir=os.path.dirname

2584

(stored_state_path))

2585

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

2586

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

2587

os.rename(tempname, stored_state_path)

2588

except (IOError, OSError) as e:

2589

if not debug:

2590

try:

2591

os.remove(tempname)

2592

except NameError:

2593

pass

2594

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

2595

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

2596

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

2597

else:

2598

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

2599

exc_info=e)

2600

raise e

2601

2602

# Delete all clients, and settings from config

2603

2013

while tcp_server.clients:

2604

name, client = tcp_server.clients.popitem()

2014

client = tcp_server.clients.pop()

2605

2015

if use_dbus:

2606

2016

client.remove_from_connection()

2017

client.disable_hook = None

2607

2018

# Don't signal anything except ClientRemoved

2608

2019

client.disable(quiet=True)

2609

2020

if use_dbus:

2610

2021

# Emit D-Bus signal

2611

mandos_dbus_service.ClientRemoved(client

2612

.dbus_object_path,

2022

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2613

2023

client.name)

2614

client_settings.clear()

2615

2024

2616

2025

atexit.register(cleanup)

2617

2026

2618

for client in tcp_server.clients.itervalues():

2027

for client in tcp_server.clients:

2619

2028

if use_dbus:

2620

2029

# Emit D-Bus signal

2621

2030

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2622

# Need to initiate checking of clients

2623

if client.enabled:

2624

client.init_checker()

2031

client.enable()

2625

2032

2626

2033

tcp_server.enable()

2627

2034

tcp_server.server_activate()

2630

2037

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

2631

2038

if use_ipv6:

2632

2039

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

2633

" flowinfo %d, scope_id %d",

2634

*tcp_server.socket.getsockname())

2040

" flowinfo %d, scope_id %d"

2041

% tcp_server.socket.getsockname())

2635

2042

else: # IPv4

2636

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

2637

*tcp_server.socket.getsockname())

2043

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

2044

% tcp_server.socket.getsockname())

2638

2045

2639

2046

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

2640

2047

2643

2050

try:

2644

2051

service.activate()

2645

2052

except dbus.exceptions.DBusException as error:

2646

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

2053

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

2647

2054

cleanup()

2648

2055

sys.exit(1)

2649

2056

# End of Avahi example code

2656

2063

logger.debug("Starting main loop")

2657

2064

main_loop.run()

2658

2065

except AvahiError as error:

2659

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

2066

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

2660

2067

cleanup()

2661

2068

sys.exit(1)

2662

2069

except KeyboardInterrupt: