/mandos/trunk : revision 24.1.174

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

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#

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# Everything else is

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#

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

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

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# along with this program. If not, see

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

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#

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

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

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#

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from __future__ import (division, absolute_import, print_function,

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import functools

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import dbus

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import dbus.service

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import ctypes.util

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import xml.dom.minidom

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import inspect

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import GnuPGInterface

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.5.3"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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version = "1.3.0"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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

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"""init logger and add loglevel"""

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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

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pass

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class PGPEngine(object):

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

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def __init__(self):

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self.gnupg = GnuPGInterface.GnuPG()

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

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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

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'--quiet',

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'--no-use-agent'])

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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def encrypt(self, data, password):

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

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

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return ciphertext

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def decrypt(self, data, password):

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

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

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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decrypted_plaintext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return decrypted_plaintext

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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class AvahiError(Exception):

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

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

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

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

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

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

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self.name)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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def remove(self):

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

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if self.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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"""

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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}"

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.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"])

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client["approval_duration"] = string_to_delta(

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section["approval_duration"])

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

510

client["last_approval_request"] = None

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client["last_checked_ok"] = None

512

client["last_checker_status"] = -2

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return settings

515

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

324

return self._timedelta_to_milliseconds(self.approval_delay)

325

326

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

522

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)

528

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()

535

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# function

337

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

338

.replace(" ", ""))

536

339

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

537

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

538

datetime.datetime.utcnow())

539

540

# 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

355

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

568

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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401

def disable(self, quiet=True):

580

402

"""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

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

1025

.__metaclass__):

1026

"""Applied to an empty subclass of a D-Bus object, this metaclass

1027

will add additional D-Bus attributes matching a certain pattern.

1028

"""

1029

def __new__(mcs, name, bases, attr):

1030

# Go through all the base classes which could have D-Bus

1031

# methods, signals, or properties in them

1032

old_interface_names = []

1033

for base in (b for b in bases

1034

if issubclass(b, dbus.service.Object)):

1035

# Go though all attributes of the base class

1036

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

1037

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

1038

# with the wrong interface name

1039

if (not hasattr(attribute, "_dbus_interface")

1040

or not attribute._dbus_interface

1041

.startswith("se.recompile.Mandos")):

1042

continue

1043

# Create an alternate D-Bus interface name based on

1044

# the current name

1045

alt_interface = (attribute._dbus_interface

1046

.replace("se.recompile.Mandos",

1047

"se.bsnet.fukt.Mandos"))

1048

if alt_interface != attribute._dbus_interface:

1049

old_interface_names.append(alt_interface)

1050

# Is this a D-Bus signal?

1051

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

1052

# Extract the original non-method function by

1053

# black magic

1054

nonmethod_func = (dict(

1055

zip(attribute.func_code.co_freevars,

1056

attribute.__closure__))["func"]

1057

.cell_contents)

1058

# Create a new, but exactly alike, function

1059

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

1060

# with the alternate D-Bus interface name

1061

new_function = (dbus.service.signal

1062

(alt_interface,

1063

attribute._dbus_signature)

1064

(types.FunctionType(

1065

nonmethod_func.func_code,

1066

nonmethod_func.func_globals,

1067

nonmethod_func.func_name,

1068

nonmethod_func.func_defaults,

1069

nonmethod_func.func_closure)))

1070

# Copy annotations, if any

1071

try:

1072

new_function._dbus_annotations = (

1073

dict(attribute._dbus_annotations))

1074

except AttributeError:

1075

pass

1076

# Define a creator of a function to call both the

1077

# old and new functions, so both the old and new

1078

# signals gets sent when the function is called

1079

def fixscope(func1, func2):

1080

"""This function is a scope container to pass

1081

func1 and func2 to the "call_both" function

1082

outside of its arguments"""

1083

def call_both(*args, **kwargs):

1084

"""This function will emit two D-Bus

1085

signals by calling func1 and func2"""

1086

func1(*args, **kwargs)

1087

func2(*args, **kwargs)

1088

return call_both

1089

# Create the "call_both" function and add it to

1090

# the class

1091

attr[attrname] = fixscope(attribute,

1092

new_function)

1093

# Is this a D-Bus method?

1094

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

1095

# Create a new, but exactly alike, function

1096

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

1097

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

1098

# to the class.

1099

attr[attrname] = (dbus.service.method

1100

(alt_interface,

1101

attribute._dbus_in_signature,

1102

attribute._dbus_out_signature)

1103

(types.FunctionType

1104

(attribute.func_code,

1105

attribute.func_globals,

1106

attribute.func_name,

1107

attribute.func_defaults,

1108

attribute.func_closure)))

1109

# Copy annotations, if any

1110

try:

1111

attr[attrname]._dbus_annotations = (

1112

dict(attribute._dbus_annotations))

1113

except AttributeError:

1114

pass

1115

# Is this a D-Bus property?

1116

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

1117

# Create a new, but exactly alike, function

1118

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

1119

# property with the alternate D-Bus interface

1120

# name. Add it to the class.

1121

attr[attrname] = (dbus_service_property

1122

(alt_interface,

1123

attribute._dbus_signature,

1124

attribute._dbus_access,

1125

attribute

1126

._dbus_get_args_options

1127

["byte_arrays"])

1128

(types.FunctionType

1129

(attribute.func_code,

1130

attribute.func_globals,

1131

attribute.func_name,

1132

attribute.func_defaults,

1133

attribute.func_closure)))

1134

# Copy annotations, if any

1135

try:

1136

attr[attrname]._dbus_annotations = (

1137

dict(attribute._dbus_annotations))

1138

except AttributeError:

1139

pass

1140

# Is this a D-Bus interface?

1141

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

1142

# Create a new, but exactly alike, function

1143

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

1144

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

1145

# to the class.

1146

attr[attrname] = (dbus_interface_annotations

1147

(alt_interface)

1148

(types.FunctionType

1149

(attribute.func_code,

1150

attribute.func_globals,

1151

attribute.func_name,

1152

attribute.func_defaults,

1153

attribute.func_closure)))

1154

# Deprecate all old interfaces

1155

iname="_AlternateDBusNamesMetaclass_interface_annotation{0}"

1156

for old_interface_name in old_interface_names:

1157

@dbus_interface_annotations(old_interface_name)

1158

def func(self):

1159

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

1160

# Find an unused name

1161

for aname in (iname.format(i) for i in itertools.count()):

1162

if aname not in attr:

1163

attr[aname] = func

1164

break

1165

return type.__new__(mcs, name, bases, attr)

1166

1167

1168

740

class ClientDBus(Client, DBusObjectWithProperties):

1169

741

"""A Client class using D-Bus

1170

742

1179

751

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

1180

752

1181

753

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

754

self._approvals_pending = 0

1182

755

self.bus = bus

1183

756

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

1184

757

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

1190

763

("/clients/" + client_object_name))

1191

764

DBusObjectWithProperties.__init__(self, self.bus,

1192

765

self.dbus_object_path)

1193

1194

def notifychangeproperty(transform_func,

1195

dbus_name, type_func=lambda x: x,

1196

variant_level=1):

1197

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

1198

its changes to DBus.

1199

1200

transform_fun: Function that takes a value and a variant_level

1201

and transforms it to a D-Bus type.

1202

dbus_name: D-Bus name of the variable

1203

type_func: Function that transform the value before sending it

1204

to the D-Bus. Default: no transform

1205

variant_level: D-Bus variant level. Default: 1

1206

"""

1207

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

1208

def setter(self, value):

1209

if hasattr(self, "dbus_object_path"):

1210

if (not hasattr(self, attrname) or

1211

type_func(getattr(self, attrname, None))

1212

!= type_func(value)):

1213

dbus_value = transform_func(type_func(value),

1214

variant_level

1215

=variant_level)

1216

self.PropertyChanged(dbus.String(dbus_name),

1217

dbus_value)

1218

setattr(self, attrname, value)

1219

1220

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

1221

1222

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1223

approvals_pending = notifychangeproperty(dbus.Boolean,

1224

"ApprovalPending",

1225

type_func = bool)

1226

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

1227

last_enabled = notifychangeproperty(datetime_to_dbus,

1228

"LastEnabled")

1229

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

1230

type_func = lambda checker:

1231

checker is not None)

1232

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1233

"LastCheckedOK")

1234

last_checker_status = notifychangeproperty(dbus.Int16,

1235

"LastCheckerStatus")

1236

last_approval_request = notifychangeproperty(

1237

datetime_to_dbus, "LastApprovalRequest")

1238

approved_by_default = notifychangeproperty(dbus.Boolean,

1239

"ApprovedByDefault")

1240

approval_delay = notifychangeproperty(dbus.UInt64,

1241

"ApprovalDelay",

1242

type_func =

1243

timedelta_to_milliseconds)

1244

approval_duration = notifychangeproperty(

1245

dbus.UInt64, "ApprovalDuration",

1246

type_func = timedelta_to_milliseconds)

1247

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

1248

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

1249

type_func =

1250

timedelta_to_milliseconds)

1251

extended_timeout = notifychangeproperty(

1252

dbus.UInt64, "ExtendedTimeout",

1253

type_func = timedelta_to_milliseconds)

1254

interval = notifychangeproperty(dbus.UInt64,

1255

"Interval",

1256

type_func =

1257

timedelta_to_milliseconds)

1258

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

1259

1260

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

1261

810

1262

811

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

1263

812

try:

1272

821

*args, **kwargs):

1273

822

self.checker_callback_tag = None

1274

823

self.checker = None

824

# Emit D-Bus signal

825

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

826

dbus.Boolean(False, variant_level=1))

1275

827

if os.WIFEXITED(condition):

1276

828

exitstatus = os.WEXITSTATUS(condition)

1277

829

# Emit D-Bus signal

1287

839

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

1288

840

*args, **kwargs)

1289

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

1290

859

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

1291

860

old_checker = self.checker

1292

861

if self.checker is not None:

1299

868

and old_checker_pid != self.checker.pid):

1300

869

# Emit D-Bus signal

1301

870

self.CheckerStarted(self.current_checker_command)

871

self.PropertyChanged(

872

dbus.String("CheckerRunning"),

873

dbus.Boolean(True, variant_level=1))

1302

874

return r

1303

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

1304

885

def _reset_approved(self):

1305

self.approved = None

886

self._approved = None

1306

887

return False

1307

888

1308

889

def approve(self, value=True):

1309

890

self.send_changedstate()

1310

self.approved = value

1311

gobject.timeout_add(timedelta_to_milliseconds

891

self._approved = value

892

gobject.timeout_add(self._timedelta_to_milliseconds

1312

893

(self.approval_duration),

1313

894

self._reset_approved)

1314

895

896

1315

897

## D-Bus methods, signals & properties

1316

_interface = "se.recompile.Mandos.Client"

1317

1318

## Interfaces

1319

1320

@dbus_interface_annotations(_interface)

1321

def _foo(self):

1322

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

1323

"false"}

898

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

1324

899

1325

900

## Signals

1326

901

1412

987

if value is None: # get

1413

988

return dbus.Boolean(self.approved_by_default)

1414

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))

1415

993

1416

994

# ApprovalDelay - property

1417

995

@dbus_service_property(_interface, signature="t",

1420

998

if value is None: # get

1421

999

return dbus.UInt64(self.approval_delay_milliseconds())

1422

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))

1423

1004

1424

1005

# ApprovalDuration - property

1425

1006

@dbus_service_property(_interface, signature="t",

1426

1007

access="readwrite")

1427

1008

def ApprovalDuration_dbus_property(self, value=None):

1428

1009

if value is None: # get

1429

return dbus.UInt64(timedelta_to_milliseconds(

1010

return dbus.UInt64(self._timedelta_to_milliseconds(

1430

1011

self.approval_duration))

1431

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))

1432

1016

1433

1017

# Name - property

1434

1018

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

1446

1030

def Host_dbus_property(self, value=None):

1447

1031

if value is None: # get

1448

1032

return dbus.String(self.host)

1449

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))

1450

1037

1451

1038

# Created - property

1452

1039

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

1453

1040

def Created_dbus_property(self):

1454

return datetime_to_dbus(self.created)

1041

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

1455

1042

1456

1043

# LastEnabled - property

1457

1044

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

1458

1045

def LastEnabled_dbus_property(self):

1459

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))

1460

1049

1461

1050

# Enabled - property

1462

1051

@dbus_service_property(_interface, signature="b",

1476

1065

if value is not None:

1477

1066

self.checked_ok()

1478

1067

return

1479

return datetime_to_dbus(self.last_checked_ok)

1480

1481

# LastCheckerStatus - property

1482

@dbus_service_property(_interface, signature="n",

1483

access="read")

1484

def LastCheckerStatus_dbus_property(self):

1485

return dbus.Int16(self.last_checker_status)

1486

1487

# Expires - property

1488

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

1489

def Expires_dbus_property(self):

1490

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))

1491

1072

1492

1073

# LastApprovalRequest - property

1493

1074

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

1494

1075

def LastApprovalRequest_dbus_property(self):

1495

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))

1496

1081

1497

1082

# Timeout - property

1498

1083

@dbus_service_property(_interface, signature="t",

1501

1086

if value is None: # get

1502

1087

return dbus.UInt64(self.timeout_milliseconds())

1503

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

1504

1094

# Reschedule timeout

1505

if self.enabled:

1506

now = datetime.datetime.utcnow()

1507

time_to_die = timedelta_to_milliseconds(

1508

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

1509

if time_to_die <= 0:

1510

# The timeout has passed

1511

self.disable()

1512

else:

1513

self.expires = (now +

1514

datetime.timedelta(milliseconds =

1515

time_to_die))

1516

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

1517

is None):

1518

return

1519

gobject.source_remove(self.disable_initiator_tag)

1520

self.disable_initiator_tag = (gobject.timeout_add

1521

(time_to_die,

1522

self.disable))

1523

1524

# ExtendedTimeout - property

1525

@dbus_service_property(_interface, signature="t",

1526

access="readwrite")

1527

def ExtendedTimeout_dbus_property(self, value=None):

1528

if value is None: # get

1529

return dbus.UInt64(self.extended_timeout_milliseconds())

1530

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))

1531

1109

1532

1110

# Interval - property

1533

1111

@dbus_service_property(_interface, signature="t",

1536

1114

if value is None: # get

1537

1115

return dbus.UInt64(self.interval_milliseconds())

1538

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))

1539

1120

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

1540

1121

return

1541

if self.enabled:

1542

# Reschedule checker run

1543

gobject.source_remove(self.checker_initiator_tag)

1544

self.checker_initiator_tag = (gobject.timeout_add

1545

(value, self.start_checker))

1546

self.start_checker() # Start one now, too

1547

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

1548

1128

# Checker - property

1549

1129

@dbus_service_property(_interface, signature="s",

1550

1130

access="readwrite")

1551

1131

def Checker_dbus_property(self, value=None):

1552

1132

if value is None: # get

1553

1133

return dbus.String(self.checker_command)

1554

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))

1555

1139

1556

1140

# CheckerRunning - property

1557

1141

@dbus_service_property(_interface, signature="b",

1584

1168

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

1585

1169

if not self._pipe.recv():

1586

1170

raise KeyError()

1587

1171

1588

1172

def __getattribute__(self, name):

1589

if name == '_pipe':

1173

if(name == '_pipe'):

1590

1174

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

1591

1175

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

1592

1176

data = self._pipe.recv()

1597

1181

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

1598

1182

return self._pipe.recv()[1]

1599

1183

return func

1600

1184

1601

1185

def __setattr__(self, name, value):

1602

if name == '_pipe':

1186

if(name == '_pipe'):

1603

1187

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

1604

1188

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

1605

1189

1606

1190

1607

class ClientDBusTransitional(ClientDBus):

1608

__metaclass__ = AlternateDBusNamesMetaclass

1609

1610

1611

1191

class ClientHandler(socketserver.BaseRequestHandler, object):

1612

1192

"""A class to handle client connections.

1613

1193

1620

1200

unicode(self.client_address))

1621

1201

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

1622

1202

self.server.child_pipe.fileno())

1623

1203

1624

1204

session = (gnutls.connection

1625

1205

.ClientSession(self.request,

1626

1206

gnutls.connection

1627

1207

.X509Credentials()))

1628

1208

1629

1209

# Note: gnutls.connection.X509Credentials is really a

1630

1210

# generic GnuTLS certificate credentials object so long as

1631

1211

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

1632

1212

# here despite using OpenPGP certificates.

1633

1213

1634

1214

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

1635

1215

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

1636

1216

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

1642

1222

(gnutls.library.functions

1643

1223

.gnutls_priority_set_direct(session._c_object,

1644

1224

priority, None))

1645

1225

1646

1226

# Start communication using the Mandos protocol

1647

1227

# Get protocol number

1648

1228

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

1653

1233

except (ValueError, IndexError, RuntimeError) as error:

1654

1234

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

1655

1235

return

1656

1236

1657

1237

# Start GnuTLS connection

1658

1238

try:

1659

1239

session.handshake()

1663

1243

# established. Just abandon the request.

1664

1244

return

1665

1245

logger.debug("Handshake succeeded")

1666

1246

1667

1247

approval_required = False

1668

1248

try:

1669

1249

try:

1674

1254

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

1675

1255

return

1676

1256

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

1677

1257

1678

1258

try:

1679

1259

client = ProxyClient(child_pipe, fpr,

1680

1260

self.client_address)

1692

1272

client.name)

1693

1273

if self.server.use_dbus:

1694

1274

# Emit D-Bus signal

1695

client.Rejected("Disabled")

1275

client.Rejected("Disabled")

1696

1276

return

1697

1277

1698

if client.approved or not client.approval_delay:

1278

if client._approved or not client.approval_delay:

1699

1279

#We are approved or approval is disabled

1700

1280

break

1701

elif client.approved is None:

1281

elif client._approved is None:

1702

1282

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

1703

1283

client.name)

1704

1284

if self.server.use_dbus:

1715

1295

return

1716

1296

1717

1297

#wait until timeout or approved

1298

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

1718

1299

time = datetime.datetime.now()

1719

1300

client.changedstate.acquire()

1720

(client.changedstate.wait

1721

(float(client.timedelta_to_milliseconds(delay)

1722

/ 1000)))

1301

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

1723

1302

client.changedstate.release()

1724

1303

time2 = datetime.datetime.now()

1725

1304

if (time2 - time) >= delay:

1741

1320

try:

1742

1321

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

1743

1322

except gnutls.errors.GNUTLSError as error:

1744

logger.warning("gnutls send failed",

1745

exc_info=error)

1323

logger.warning("gnutls send failed")

1746

1324

return

1747

1325

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

1748

1326

sent, len(client.secret)

1749

1327

- (sent_size + sent))

1750

1328

sent_size += sent

1751

1329

1752

1330

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

1753

# bump the timeout using extended_timeout

1754

client.bump_timeout(client.extended_timeout)

1331

# bump the timeout as if seen

1332

client.checked_ok()

1755

1333

if self.server.use_dbus:

1756

1334

# Emit D-Bus signal

1757

1335

client.GotSecret()

1762

1340

try:

1763

1341

session.bye()

1764

1342

except gnutls.errors.GNUTLSError as error:

1765

logger.warning("GnuTLS bye failed",

1766

exc_info=error)

1343

logger.warning("GnuTLS bye failed")

1767

1344

1768

1345

@staticmethod

1769

1346

def peer_certificate(session):

1825

1402

# Convert the buffer to a Python bytestring

1826

1403

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

1827

1404

# Convert the bytestring to hexadecimal notation

1828

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

1405

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

1829

1406

return hex_fpr

1830

1407

1831

1408

1834

1411

def sub_process_main(self, request, address):

1835

1412

try:

1836

1413

self.finish_request(request, address)

1837

except Exception:

1414

except:

1838

1415

self.handle_error(request, address)

1839

1416

self.close_request(request)

1840

1417

1841

1418

def process_request(self, request, address):

1842

1419

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

1843

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

1844

args = (request,

1845

address))

1846

proc.start()

1847

return proc

1848

1420

multiprocessing.Process(target = self.sub_process_main,

1421

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

1849

1422

1850

1423

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1851

1424

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

1855

1428

This function creates a new pipe in self.pipe

1856

1429

"""

1857

1430

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1858

1859

proc = MultiprocessingMixIn.process_request(self, request,

1860

client_address)

1431

1432

super(MultiprocessingMixInWithPipe,

1433

self).process_request(request, client_address)

1861

1434

self.child_pipe.close()

1862

self.add_pipe(parent_pipe, proc)

1863

1864

def add_pipe(self, parent_pipe, proc):

1435

self.add_pipe(parent_pipe)

1436

1437

def add_pipe(self, parent_pipe):

1865

1438

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

1866

1439

raise NotImplementedError

1867

1440

1868

1869

1441

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1870

1442

socketserver.TCPServer, object):

1871

1443

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

1945

1517

self.enabled = False

1946

1518

self.clients = clients

1947

1519

if self.clients is None:

1948

self.clients = {}

1520

self.clients = set()

1949

1521

self.use_dbus = use_dbus

1950

1522

self.gnutls_priority = gnutls_priority

1951

1523

IPv6_TCPServer.__init__(self, server_address,

1955

1527

def server_activate(self):

1956

1528

if self.enabled:

1957

1529

return socketserver.TCPServer.server_activate(self)

1958

1959

1530

def enable(self):

1960

1531

self.enabled = True

1961

1962

def add_pipe(self, parent_pipe, proc):

1532

def add_pipe(self, parent_pipe):

1963

1533

# Call "handle_ipc" for both data and EOF events

1964

1534

gobject.io_add_watch(parent_pipe.fileno(),

1965

1535

gobject.IO_IN | gobject.IO_HUP,

1966

1536

functools.partial(self.handle_ipc,

1967

parent_pipe =

1968

parent_pipe,

1969

proc = proc))

1970

1537

parent_pipe = parent_pipe))

1538

1971

1539

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

1972

proc = None, client_object=None):

1540

client_object=None):

1973

1541

condition_names = {

1974

1542

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

1975

1543

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

1984

1552

for cond, name in

1985

1553

condition_names.iteritems()

1986

1554

if cond & condition)

1987

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

1555

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

1988

1556

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

1989

# Wait for other process to exit

1990

proc.join()

1991

1557

return False

1992

1558

1993

1559

# Read a request from the child

1998

1564

fpr = request[1]

1999

1565

address = request[2]

2000

1566

2001

for c in self.clients.itervalues():

1567

for c in self.clients:

2002

1568

if c.fingerprint == fpr:

2003

1569

client = c

2004

1570

break

2007

1573

"dress: %s", fpr, address)

2008

1574

if self.use_dbus:

2009

1575

# Emit D-Bus signal

2010

mandos_dbus_service.ClientNotFound(fpr,

2011

address[0])

1576

mandos_dbus_service.ClientNotFound(fpr, address[0])

2012

1577

parent_pipe.send(False)

2013

1578

return False

2014

1579

2015

1580

gobject.io_add_watch(parent_pipe.fileno(),

2016

1581

gobject.IO_IN | gobject.IO_HUP,

2017

1582

functools.partial(self.handle_ipc,

2018

parent_pipe =

2019

parent_pipe,

2020

proc = proc,

2021

client_object =

2022

client))

1583

parent_pipe = parent_pipe,

1584

client_object = client))

2023

1585

parent_pipe.send(True)

2024

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

2025

# same fileno

1586

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

2026

1587

return False

2027

1588

if command == 'funcall':

2028

1589

funcname = request[1]

2029

1590

args = request[2]

2030

1591

kwargs = request[3]

2031

1592

2032

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

2033

funcname)(*args,

2034

**kwargs)))

2035

1593

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

1594

2036

1595

if command == 'getattr':

2037

1596

attrname = request[1]

2038

1597

if callable(client_object.__getattribute__(attrname)):

2039

1598

parent_pipe.send(('function',))

2040

1599

else:

2041

parent_pipe.send(('data', client_object

2042

.__getattribute__(attrname)))

1600

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

2043

1601

2044

1602

if command == 'setattr':

2045

1603

attrname = request[1]

2046

1604

value = request[2]

2047

1605

setattr(client_object, attrname, value)

2048

1606

2049

1607

return True

2050

1608

2051

1609

2081

1639

elif suffix == "w":

2082

1640

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

2083

1641

else:

2084

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

2085

.format(suffix))

1642

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

2086

1643

except (ValueError, IndexError) as e:

2087

1644

raise ValueError(*(e.args))

2088

1645

timevalue += delta

2089

1646

return timevalue

2090

1647

2091

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

2092

1673

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

2093

1674

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

2094

1675

2102

1683

sys.exit()

2103

1684

if not noclose:

2104

1685

# Close all standard open file descriptors

2105

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

1686

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

2106

1687

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

2107

1688

raise OSError(errno.ENODEV,

2108

"{0} not a character device"

2109

.format(os.devnull))

1689

"%s not a character device"

1690

% os.path.devnull)

2110

1691

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

2111

1692

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

2112

1693

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

2121

1702

2122

1703

parser = argparse.ArgumentParser()

2123

1704

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

2124

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

1705

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

2125

1706

help="show version number and exit")

2126

1707

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

2127

1708

help="Bind to interface IF")

2149

1730

" system bus interface")

2150

1731

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

2151

1732

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

2152

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

2153

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

2154

" state")

2155

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

2156

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

2157

2158

1733

options = parser.parse_args()

2159

1734

2160

1735

if options.check:

2173

1748

"use_dbus": "True",

2174

1749

"use_ipv6": "True",

2175

1750

"debuglevel": "",

2176

"restore": "True",

2177

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

2178

1751

}

2179

1752

2180

1753

# Parse config file for server-global settings

2197

1770

# options, if set.

2198

1771

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

2199

1772

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

2200

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

2201

"statedir"):

1773

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

2202

1774

value = getattr(options, option)

2203

1775

if value is not None:

2204

1776

server_settings[option] = value

2216

1788

debuglevel = server_settings["debuglevel"]

2217

1789

use_dbus = server_settings["use_dbus"]

2218

1790

use_ipv6 = server_settings["use_ipv6"]

2219

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

2220

stored_state_file)

2221

2222

if debug:

2223

initlogger(debug, logging.DEBUG)

2224

else:

2225

if not debuglevel:

2226

initlogger(debug)

2227

else:

2228

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

2229

initlogger(debug, level)

2230

1791

2231

1792

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

2232

1793

syslogger.setFormatter(logging.Formatter

2233

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

2234

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

2235

.format(server_settings

2236

["servicename"])))

1794

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

1795

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

1796

% server_settings["servicename"]))

2237

1797

2238

1798

# Parse config file with clients

2239

client_config = configparser.SafeConfigParser(Client

2240

.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)

2241

1807

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

2242

1808

"clients.conf"))

2243

1809

2257

1823

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

2258

1824

try:

2259

1825

pidfile = open(pidfilename, "w")

2260

except IOError as e:

2261

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

2262

exc_info=e)

1826

except IOError:

1827

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

2263

1828

2264

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:

2265

1833

try:

2266

uid = pwd.getpwnam(name).pw_uid

2267

gid = pwd.getpwnam(name).pw_gid

2268

break

1834

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

1835

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

2269

1836

except KeyError:

2270

continue

2271

else:

2272

uid = 65534

2273

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

2274

1843

try:

2275

1844

os.setgid(gid)

2276

1845

os.setuid(uid)

2278

1847

if error[0] != errno.EPERM:

2279

1848

raise error

2280

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

2281

1858

if debug:

2282

1859

# Enable all possible GnuTLS debugging

2283

1860

2293

1870

.gnutls_global_set_log_function(debug_gnutls))

2294

1871

2295

1872

# Redirect stdin so all checkers get /dev/null

2296

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

1873

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

2297

1874

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

2298

1875

if null > 2:

2299

1876

os.close(null)

1877

else:

1878

# No console logging

1879

logger.removeHandler(console)

2300

1880

2301

1881

# Need to fork before connecting to D-Bus

2302

1882

if not debug:

2303

1883

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

2304

1884

daemon()

2305

1885

2306

gobject.threads_init()

2307

2308

1886

global main_loop

2309

1887

# From the Avahi example code

2310

DBusGMainLoop(set_as_default=True)

1888

DBusGMainLoop(set_as_default=True )

2311

1889

main_loop = gobject.MainLoop()

2312

1890

bus = dbus.SystemBus()

2313

1891

# End of Avahi example code

2314

1892

if use_dbus:

2315

1893

try:

2316

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

1894

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

2317

1895

bus, do_not_queue=True)

2318

old_bus_name = (dbus.service.BusName

2319

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

2320

do_not_queue=True))

2321

1896

except dbus.exceptions.NameExistsException as e:

2322

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

1897

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

2323

1898

use_dbus = False

2324

1899

server_settings["use_dbus"] = False

2325

1900

tcp_server.use_dbus = False

2326

1901

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2327

service = AvahiServiceToSyslog(name =

2328

server_settings["servicename"],

2329

servicetype = "_mandos._tcp",

2330

protocol = protocol, bus = bus)

1902

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

1903

servicetype = "_mandos._tcp",

1904

protocol = protocol, bus = bus)

2331

1905

if server_settings["interface"]:

2332

1906

service.interface = (if_nametoindex

2333

1907

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

2337

1911

2338

1912

client_class = Client

2339

1913

if use_dbus:

2340

client_class = functools.partial(ClientDBusTransitional,

2341

bus = bus)

2342

2343

client_settings = Client.config_parser(client_config)

2344

old_client_settings = {}

2345

clients_data = {}

2346

2347

# Get client data and settings from last running state.

2348

if server_settings["restore"]:

2349

try:

2350

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

2351

clients_data, old_client_settings = (pickle.load

2352

(stored_state))

2353

os.remove(stored_state_path)

2354

except IOError as e:

2355

if e.errno == errno.ENOENT:

2356

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

2357

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

2358

else:

2359

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

2360

exc_info=e)

2361

raise

2362

except EOFError as e:

2363

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

2364

"EOFError:", exc_info=e)

2365

2366

with PGPEngine() as pgp:

2367

for client_name, client in clients_data.iteritems():

2368

# Decide which value to use after restoring saved state.

2369

# We have three different values: Old config file,

2370

# new config file, and saved state.

2371

# New config value takes precedence if it differs from old

2372

# config value, otherwise use saved state.

2373

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

2374

try:

2375

# For each value in new config, check if it

2376

# differs from the old config value (Except for

2377

# the "secret" attribute)

2378

if (name != "secret" and

2379

value != old_client_settings[client_name]

2380

[name]):

2381

client[name] = value

2382

except KeyError:

2383

pass

2384

2385

# Clients who has passed its expire date can still be

2386

# enabled if its last checker was successful. Clients

2387

# whose checker succeeded before we stored its state is

2388

# assumed to have successfully run all checkers during

2389

# downtime.

2390

if client["enabled"]:

2391

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

2392

if not client["last_checked_ok"]:

2393

logger.warning(

2394

"disabling client {0} - Client never "

2395

"performed a successful checker"

2396

.format(client_name))

2397

client["enabled"] = False

2398

elif client["last_checker_status"] != 0:

2399

logger.warning(

2400

"disabling client {0} - Client "

2401

"last checker failed with error code {1}"

2402

.format(client_name,

2403

client["last_checker_status"]))

2404

client["enabled"] = False

2405

else:

2406

client["expires"] = (datetime.datetime

2407

.utcnow()

2408

+ client["timeout"])

2409

logger.debug("Last checker succeeded,"

2410

" keeping {0} enabled"

2411

.format(client_name))

1914

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

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):

2412

1922

try:

2413

client["secret"] = (

2414

pgp.decrypt(client["encrypted_secret"],

2415

client_settings[client_name]

2416

["secret"]))

2417

except PGPError:

2418

# If decryption fails, we use secret from new settings

2419

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

2420

.format(client_name))

2421

client["secret"] = (

2422

client_settings[client_name]["secret"])

2423

2424

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

2425

for client_name in (set(old_client_settings)

2426

- set(client_settings)):

2427

del clients_data[client_name]

2428

for client_name in (set(client_settings)

2429

- set(old_client_settings)):

2430

clients_data[client_name] = client_settings[client_name]

2431

2432

# Create all client objects

2433

for client_name, client in clients_data.iteritems():

2434

tcp_server.clients[client_name] = client_class(

2435

name = client_name, settings = client)

2436

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()))

2437

1932

if not tcp_server.clients:

2438

1933

logger.warning("No clients defined")

2439

1934

2440

1935

if not debug:

2441

1936

try:

2442

1937

with pidfile:

2450

1945

# "pidfile" was never created

2451

1946

pass

2452

1947

del pidfilename

1948

2453

1949

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

2454

1950

2455

1951

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

2456

1952

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

2457

1953

2458

1954

if use_dbus:

2459

class MandosDBusService(DBusObjectWithProperties):

1955

class MandosDBusService(dbus.service.Object):

2460

1956

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

2461

1957

def __init__(self):

2462

1958

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

2463

_interface = "se.recompile.Mandos"

2464

2465

@dbus_interface_annotations(_interface)

2466

def _foo(self):

2467

return { "org.freedesktop.DBus.Property"

2468

".EmitsChangedSignal":

2469

"false"}

1959

_interface = "se.bsnet.fukt.Mandos"

2470

1960

2471

1961

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

2472

1962

def ClientAdded(self, objpath):

2487

1977

def GetAllClients(self):

2488

1978

"D-Bus method"

2489

1979

return dbus.Array(c.dbus_object_path

2490

for c in

2491

tcp_server.clients.itervalues())

1980

for c in tcp_server.clients)

2492

1981

2493

1982

@dbus.service.method(_interface,

2494

1983

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

2496

1985

"D-Bus method"

2497

1986

return dbus.Dictionary(

2498

1987

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

2499

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

1988

for c in tcp_server.clients),

2500

1989

signature="oa{sv}")

2501

1990

2502

1991

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

2503

1992

def RemoveClient(self, object_path):

2504

1993

"D-Bus method"

2505

for c in tcp_server.clients.itervalues():

1994

for c in tcp_server.clients:

2506

1995

if c.dbus_object_path == object_path:

2507

del tcp_server.clients[c.name]

1996

tcp_server.clients.remove(c)

2508

1997

c.remove_from_connection()

2509

1998

# Don't signal anything except ClientRemoved

2510

1999

c.disable(quiet=True)

2515

2004

2516

2005

del _interface

2517

2006

2518

class MandosDBusServiceTransitional(MandosDBusService):

2519

__metaclass__ = AlternateDBusNamesMetaclass

2520

mandos_dbus_service = MandosDBusServiceTransitional()

2007

mandos_dbus_service = MandosDBusService()

2521

2008

2522

2009

def cleanup():

2523

2010

"Cleanup function; run on exit"

2524

2011

service.cleanup()

2525

2012

2526

multiprocessing.active_children()

2527

if not (tcp_server.clients or client_settings):

2528

return

2529

2530

# Store client before exiting. Secrets are encrypted with key

2531

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

2532

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

2533

clients = {}

2534

with PGPEngine() as pgp:

2535

for client in tcp_server.clients.itervalues():

2536

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

2537

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

2538

key)

2539

client_dict = {}

2540

2541

# A list of attributes that can not be pickled

2542

# + secret.

2543

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

2544

"checker"))

2545

for name, typ in (inspect.getmembers

2546

(dbus.service.Object)):

2547

exclude.add(name)

2548

2549

client_dict["encrypted_secret"] = (client

2550

.encrypted_secret)

2551

for attr in client.client_structure:

2552

if attr not in exclude:

2553

client_dict[attr] = getattr(client, attr)

2554

2555

clients[client.name] = client_dict

2556

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

2557

2558

try:

2559

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

2560

prefix="clients-",

2561

dir=os.path.dirname

2562

(stored_state_path))

2563

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

2564

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

2565

os.rename(tempname, stored_state_path)

2566

except (IOError, OSError) as e:

2567

if not debug:

2568

try:

2569

os.remove(tempname)

2570

except NameError:

2571

pass

2572

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

2573

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

2574

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

2575

else:

2576

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

2577

exc_info=e)

2578

raise e

2579

2580

# Delete all clients, and settings from config

2581

2013

while tcp_server.clients:

2582

name, client = tcp_server.clients.popitem()

2014

client = tcp_server.clients.pop()

2583

2015

if use_dbus:

2584

2016

client.remove_from_connection()

2017

client.disable_hook = None

2585

2018

# Don't signal anything except ClientRemoved

2586

2019

client.disable(quiet=True)

2587

2020

if use_dbus:

2588

2021

# Emit D-Bus signal

2589

mandos_dbus_service.ClientRemoved(client

2590

.dbus_object_path,

2022

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2591

2023

client.name)

2592

client_settings.clear()

2593

2024

2594

2025

atexit.register(cleanup)

2595

2026

2596

for client in tcp_server.clients.itervalues():

2027

for client in tcp_server.clients:

2597

2028

if use_dbus:

2598

2029

# Emit D-Bus signal

2599

2030

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2600

# Need to initiate checking of clients

2601

if client.enabled:

2602

client.init_checker()

2031

client.enable()

2603

2032

2604

2033

tcp_server.enable()

2605

2034

tcp_server.server_activate()

2608

2037

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

2609

2038

if use_ipv6:

2610

2039

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

2611

" flowinfo %d, scope_id %d",

2612

*tcp_server.socket.getsockname())

2040

" flowinfo %d, scope_id %d"

2041

% tcp_server.socket.getsockname())

2613

2042

else: # IPv4

2614

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

2615

*tcp_server.socket.getsockname())

2043

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

2044

% tcp_server.socket.getsockname())

2616

2045

2617

2046

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

2618

2047

2621

2050

try:

2622

2051

service.activate()

2623

2052

except dbus.exceptions.DBusException as error:

2624

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

2053

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

2625

2054

cleanup()

2626

2055

sys.exit(1)

2627

2056

# End of Avahi example code

2634

2063

logger.debug("Starting main loop")

2635

2064

main_loop.run()

2636

2065

except AvahiError as error:

2637

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

2066

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

2638

2067

cleanup()

2639

2068

sys.exit(1)

2640

2069

except KeyboardInterrupt: