/mandos/trunk : revision 482

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

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#

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# Everything else is

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#

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

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

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# along with this program. If not, see

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

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#

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

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

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#

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from __future__ import (division, absolute_import, print_function,

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import functools

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import dbus

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import dbus.service

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import ctypes.util

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import xml.dom.minidom

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import inspect

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import GnuPGInterface

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.5.3"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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version = "1.3.0"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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

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"""init logger and add loglevel"""

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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

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pass

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class PGPEngine(object):

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

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def __init__(self):

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self.gnupg = GnuPGInterface.GnuPG()

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

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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

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'--quiet',

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'--no-use-agent'])

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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def encrypt(self, data, password):

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

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

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return ciphertext

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def decrypt(self, data, password):

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

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

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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decrypted_plaintext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return decrypted_plaintext

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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class AvahiError(Exception):

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

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

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

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

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

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

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self.name)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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def remove(self):

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

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if self.group is not None:

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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException) as e:

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pass

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self.group = None

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match.remove()

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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if self.group is None:

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self.group = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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self.server.EntryGroupNew()),

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.group = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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self.server.EntryGroupNew(),

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follow_name_owner_changes=True),

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self.entry_group_state_changed))

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'StateChanged', self .entry_group_state_changed))

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

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self.name, self.type)

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self.group.AddService(

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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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unicode(error))

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

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.format(error))

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raise AvahiGroupError("State changed: %s"

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% unicode(error))

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def cleanup(self):

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

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if self.group is not None:

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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException):

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pass

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self.group = None

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self.remove()

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

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

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

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avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

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if state in bad_states:

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if bad_states[state] is not None:

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if error is None:

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logger.error(bad_states[state])

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else:

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

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self.cleanup()

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if bad_states[state]:

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logger.error(bad_states[state])

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self.remove()

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elif state == avahi.SERVER_RUNNING:

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self.add()

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else:

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if error is None:

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

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else:

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

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

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def activate(self):

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

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if self.server is None:

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self.server_state_changed)

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

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class AvahiServiceToSyslog(AvahiService):

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def rename(self):

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

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ret = AvahiService.rename(self)

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syslogger.setFormatter(logging.Formatter

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

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

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.format(self.name)))

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return ret

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def timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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class Client(object):

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

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Attributes:

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

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

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

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

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

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

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checker_initiator_tag: a gobject event source tag, or None

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

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client_structure: Object describing what attributes a client has

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and is used for storing the client at exit

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current_checker_command: string; current running checker_command

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

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disable_initiator_tag: a gobject event source tag, or None

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enabled: bool()

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

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

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

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

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last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, -2 means no checker completed yet.

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

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last_enabled: datetime.datetime(); (UTC)

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

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D-Bus identifiers

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

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

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until this client is disabled

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extended_timeout: extra long timeout when secret has been sent

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runtime_expansions: Allowed attributes for runtime expansion.

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

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disabled, or None

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"""

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runtime_expansions = ("approval_delay", "approval_duration",

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

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

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

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

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"extended_timeout": "15m",

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"interval": "2m",

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

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"host": "",

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"approval_delay": "0s",

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"approval_duration": "1s",

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"approved_by_default": "True",

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"enabled": "True",

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}

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@staticmethod

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def _timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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def timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.timeout)

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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.extended_timeout)

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return self._timedelta_to_milliseconds(self.timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return timedelta_to_milliseconds(self.interval)

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return self._timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

467

return timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

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def config_parser(config):

471

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

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

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with exceptions for any special settings as defined above.

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

475

value given the same arguments.

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"""

477

settings = {}

478

for client_name in config.sections():

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section = dict(config.items(client_name))

480

client = settings[client_name] = {}

481

482

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

483

# Reformat values from string types to Python types

484

client["approved_by_default"] = config.getboolean(

485

client_name, "approved_by_default")

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

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"enabled")

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

490

.replace(" ", ""))

491

if "secret" in section:

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

493

elif "secfile" in section:

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

495

(section["secfile"])),

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"rb") as secfile:

497

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

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else:

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

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.format(section))

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

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client["extended_timeout"] = string_to_delta(

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section["extended_timeout"])

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

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client["approval_delay"] = string_to_delta(

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section["approval_delay"])

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client["approval_duration"] = string_to_delta(

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section["approval_duration"])

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

510

client["last_approval_request"] = None

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client["last_checked_ok"] = None

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client["last_checker_status"] = -2

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return settings

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

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return self._timedelta_to_milliseconds(self.approval_delay)

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

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

320

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

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attribute."""

517

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self.name = name

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# adding all client settings

519

for setting, value in settings.iteritems():

520

setattr(self, setting, value)

521

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if self.enabled:

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if not hasattr(self, "last_enabled"):

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self.last_enabled = datetime.datetime.utcnow()

525

if not hasattr(self, "expires"):

526

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

527

+ self.timeout)

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else:

529

self.last_enabled = None

530

self.expires = None

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323

if config is None:

324

config = {}

532

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

533

326

# Uppercase and remove spaces from fingerprint for later

534

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# comparison purposes with return value from the fingerprint()

535

328

# function

329

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

330

.replace(" ", ""))

536

331

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

537

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

538

datetime.datetime.utcnow())

539

540

# attributes specific for this server instance

332

if "secret" in config:

333

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

334

elif "secfile" in config:

335

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

336

(config["secfile"])),

337

"rb") as secfile:

338

self.secret = secfile.read()

339

else:

340

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

341

% self.name)

342

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

343

self.created = datetime.datetime.utcnow()

344

self.enabled = False

345

self.last_approval_request = None

346

self.last_enabled = None

347

self.last_checked_ok = None

348

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

349

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

350

self.disable_hook = disable_hook

541

351

self.checker = None

542

352

self.checker_initiator_tag = None

543

353

self.disable_initiator_tag = None

544

354

self.checker_callback_tag = None

355

self.checker_command = config["checker"]

545

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self.current_checker_command = None

546

self.approved = None

357

self.last_connect = None

358

self._approved = None

359

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

360

True)

547

361

self.approvals_pending = 0

548

self.changedstate = (multiprocessing_manager

549

.Condition(multiprocessing_manager

550

.Lock()))

551

self.client_structure = [attr for attr in

552

self.__dict__.iterkeys()

553

if not attr.startswith("_")]

554

self.client_structure.append("client_structure")

555

556

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

557

lambda obj:

558

isinstance(obj,

559

property)):

560

if not name.startswith("_"):

561

self.client_structure.append(name)

362

self.approval_delay = string_to_delta(

363

config["approval_delay"])

364

self.approval_duration = string_to_delta(

365

config["approval_duration"])

366

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

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# Send notice to process children that client state has changed

564

368

def send_changedstate(self):

565

with self.changedstate:

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self.changedstate.notify_all()

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self.changedstate.acquire()

370

self.changedstate.notify_all()

371

self.changedstate.release()

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def enable(self):

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

570

375

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

571

376

# Already enabled

572

377

return

573

378

self.send_changedstate()

574

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

575

self.enabled = True

576

379

self.last_enabled = datetime.datetime.utcnow()

577

self.init_checker()

380

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

381

# and every interval from then on.

382

self.checker_initiator_tag = (gobject.timeout_add

383

(self.interval_milliseconds(),

384

self.start_checker))

385

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

386

self.disable_initiator_tag = (gobject.timeout_add

387

(self.timeout_milliseconds(),

388

self.disable))

389

self.enabled = True

390

# Also start a new checker *right now*.

391

self.start_checker()

578

392

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def disable(self, quiet=True):

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394

"""Disable this client."""

587

401

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

588

402

gobject.source_remove(self.disable_initiator_tag)

589

403

self.disable_initiator_tag = None

590

self.expires = None

591

404

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

592

405

gobject.source_remove(self.checker_initiator_tag)

593

406

self.checker_initiator_tag = None

594

407

self.stop_checker()

408

if self.disable_hook:

409

self.disable_hook(self)

595

410

self.enabled = False

596

411

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

597

412

return False

598

413

599

414

def __del__(self):

415

self.disable_hook = None

600

416

self.disable()

601

417

602

def init_checker(self):

603

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

604

# and every interval from then on.

605

self.checker_initiator_tag = (gobject.timeout_add

606

(self.interval_milliseconds(),

607

self.start_checker))

608

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

609

self.disable_initiator_tag = (gobject.timeout_add

610

(self.timeout_milliseconds(),

611

self.disable))

612

# Also start a new checker *right now*.

613

self.start_checker()

614

615

418

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

616

419

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

617

420

self.checker_callback_tag = None

618

421

self.checker = None

619

422

if os.WIFEXITED(condition):

620

self.last_checker_status = os.WEXITSTATUS(condition)

621

if self.last_checker_status == 0:

423

exitstatus = os.WEXITSTATUS(condition)

424

if exitstatus == 0:

622

425

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

623

426

vars(self))

624

427

self.checked_ok()

626

429

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

627

430

vars(self))

628

431

else:

629

self.last_checker_status = -1

630

432

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

631

433

vars(self))

632

434

633

435

def checked_ok(self):

634

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

436

"""Bump up the timeout for this client.

437

438

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

439

alive and well.

440

"""

635

441

self.last_checked_ok = datetime.datetime.utcnow()

636

self.last_checker_status = 0

637

self.bump_timeout()

638

639

def bump_timeout(self, timeout=None):

640

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

641

if timeout is None:

642

timeout = self.timeout

643

if self.disable_initiator_tag is not None:

644

gobject.source_remove(self.disable_initiator_tag)

645

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

646

self.disable_initiator_tag = (gobject.timeout_add

647

(timedelta_to_milliseconds

648

(timeout), self.disable))

649

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

442

gobject.source_remove(self.disable_initiator_tag)

443

self.disable_initiator_tag = (gobject.timeout_add

444

(self.timeout_milliseconds(),

445

self.disable))

650

446

651

447

def need_approval(self):

652

448

self.last_approval_request = datetime.datetime.utcnow()

692

488

'replace')))

693

489

for attr in

694

490

self.runtime_expansions)

695

491

696

492

try:

697

493

command = self.checker_command % escaped_attrs

698

494

except TypeError as error:

699

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

700

self.checker_command, exc_info=error)

495

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

496

' %s', self.checker_command, error)

701

497

return True # Try again later

702

498

self.current_checker_command = command

703

499

try:

721

517

gobject.source_remove(self.checker_callback_tag)

722

518

self.checker_callback(pid, status, command)

723

519

except OSError as error:

724

logger.error("Failed to start subprocess",

725

exc_info=error)

520

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

521

error)

726

522

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

727

523

return True

728

524

735

531

return

736

532

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

737

533

try:

738

self.checker.terminate()

534

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

739

535

#time.sleep(0.5)

740

536

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

741

# self.checker.kill()

537

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

742

538

except OSError as error:

743

539

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

744

540

raise

745

541

self.checker = None

746

542

747

748

543

def dbus_service_property(dbus_interface, signature="v",

749

544

access="readwrite", byte_arrays=False):

750

545

"""Decorators for marking methods of a DBusObjectWithProperties to

761

556

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

762

557

if byte_arrays and signature != "ay":

763

558

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

764

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

559

" signature %r" % signature)

765

560

def decorator(func):

766

561

func._dbus_is_property = True

767

562

func._dbus_interface = dbus_interface

775

570

return decorator

776

571

777

572

778

def dbus_interface_annotations(dbus_interface):

779

"""Decorator for marking functions returning interface annotations

780

781

Usage:

782

783

@dbus_interface_annotations("org.example.Interface")

784

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

785

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

786

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

787

"false"}

788

"""

789

def decorator(func):

790

func._dbus_is_interface = True

791

func._dbus_interface = dbus_interface

792

func._dbus_name = dbus_interface

793

return func

794

return decorator

795

796

797

def dbus_annotations(annotations):

798

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

799

Usage:

800

801

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

802

access="r")

803

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

804

"org.freedesktop.DBus.Property."

805

"EmitsChangedSignal": "false"})

806

def Property_dbus_property(self):

807

return dbus.Boolean(False)

808

"""

809

def decorator(func):

810

func._dbus_annotations = annotations

811

return func

812

return decorator

813

814

815

573

class DBusPropertyException(dbus.exceptions.DBusException):

816

574

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

817

575

"""

833

591

834

592

class DBusObjectWithProperties(dbus.service.Object):

835

593

"""A D-Bus object with properties.

836

594

837

595

Classes inheriting from this can use the dbus_service_property

838

596

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

839

597

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

840

598

"""

841

599

842

600

@staticmethod

843

def _is_dbus_thing(thing):

844

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

845

846

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

847

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

848

"""

849

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

850

False)

601

def _is_dbus_property(obj):

602

return getattr(obj, "_dbus_is_property", False)

851

603

852

def _get_all_dbus_things(self, thing):

604

def _get_all_dbus_properties(self):

853

605

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

854

606

"""

855

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

856

name),

857

athing.__get__(self))

858

for cls in self.__class__.__mro__

859

for name, athing in

860

inspect.getmembers(cls,

861

self._is_dbus_thing(thing)))

607

return ((prop._dbus_name, prop)

608

for name, prop in

609

inspect.getmembers(self, self._is_dbus_property))

862

610

863

611

def _get_dbus_property(self, interface_name, property_name):

864

612

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

865

613

property with the specified name and interface.

866

614

"""

867

for cls in self.__class__.__mro__:

868

for name, value in (inspect.getmembers

869

(cls,

870

self._is_dbus_thing("property"))):

871

if (value._dbus_name == property_name

872

and value._dbus_interface == interface_name):

873

return value.__get__(self)

874

615

for name in (property_name,

616

property_name + "_dbus_property"):

617

prop = getattr(self, name, None)

618

if (prop is None

619

or not self._is_dbus_property(prop)

620

or prop._dbus_name != property_name

621

or (interface_name and prop._dbus_interface

622

and interface_name != prop._dbus_interface)):

623

continue

624

return prop

875

625

# No such property

876

626

raise DBusPropertyNotFound(self.dbus_object_path + ":"

877

627

+ interface_name + "."

902

652

# signatures other than "ay".

903

653

if prop._dbus_signature != "ay":

904

654

raise ValueError

905

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

906

for byte in value))

655

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

656

for byte in value))

907

657

prop(value)

908

658

909

659

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

911

661

def GetAll(self, interface_name):

912

662

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

913

663

standard.

914

664

915

665

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

916

666

"""

917

properties = {}

918

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

667

all = {}

668

for name, prop in self._get_all_dbus_properties():

919

669

if (interface_name

920

670

and interface_name != prop._dbus_interface):

921

671

# Interface non-empty but did not match

925

675

continue

926

676

value = prop()

927

677

if not hasattr(value, "variant_level"):

928

properties[name] = value

678

all[name] = value

929

679

continue

930

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

931

value.variant_level+1)

932

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

680

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

681

value.variant_level+1)

682

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

933

683

934

684

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

935

685

out_signature="s",

936

686

path_keyword='object_path',

937

687

connection_keyword='connection')

938

688

def Introspect(self, object_path, connection):

939

"""Overloading of standard D-Bus method.

940

941

Inserts property tags and interface annotation tags.

689

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

942

690

"""

943

691

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

944

692

connection)

951

699

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

952

700

return e

953

701

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

954

# Add property tags

955

702

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

956

703

for name, prop

957

in self._get_all_dbus_things("property")

704

in self._get_all_dbus_properties()

958

705

if prop._dbus_interface

959

706

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

960

707

if_tag.appendChild(tag)

961

# Add annotation tags

962

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

963

for tag in if_tag.getElementsByTagName(typ):

964

annots = dict()

965

for name, prop in (self.

966

_get_all_dbus_things(typ)):

967

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

968

and prop._dbus_interface

969

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

970

annots.update(getattr

971

(prop,

972

"_dbus_annotations",

973

{}))

974

for name, value in annots.iteritems():

975

ann_tag = document.createElement(

976

"annotation")

977

ann_tag.setAttribute("name", name)

978

ann_tag.setAttribute("value", value)

979

tag.appendChild(ann_tag)

980

# Add interface annotation tags

981

for annotation, value in dict(

982

itertools.chain(

983

*(annotations().iteritems()

984

for name, annotations in

985

self._get_all_dbus_things("interface")

986

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

987

))).iteritems():

988

ann_tag = document.createElement("annotation")

989

ann_tag.setAttribute("name", annotation)

990

ann_tag.setAttribute("value", value)

991

if_tag.appendChild(ann_tag)

992

708

# Add the names to the return values for the

993

709

# "org.freedesktop.DBus.Properties" methods

994

710

if (if_tag.getAttribute("name")

1009

725

except (AttributeError, xml.dom.DOMException,

1010

726

xml.parsers.expat.ExpatError) as error:

1011

727

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

1012

exc_info=error)

728

error)

1013

729

return xmlstring

1014

730

1015

731

1016

def datetime_to_dbus (dt, variant_level=0):

1017

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

1018

if dt is None:

1019

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

1020

return dbus.String(dt.isoformat(),

1021

variant_level=variant_level)

1022

1023

1024

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

732

class ClientDBus(Client, DBusObjectWithProperties):

1169

733

"""A Client class using D-Bus

1170

734

1179

743

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

1180

744

1181

745

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

746

self._approvals_pending = 0

1182

747

self.bus = bus

1183

748

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

1184

749

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

1190

755

("/clients/" + client_object_name))

1191

756

DBusObjectWithProperties.__init__(self, self.bus,

1192

757

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

758

759

def _get_approvals_pending(self):

760

return self._approvals_pending

761

def _set_approvals_pending(self, value):

762

old_value = self._approvals_pending

763

self._approvals_pending = value

764

bval = bool(value)

765

if (hasattr(self, "dbus_object_path")

766

and bval is not bool(old_value)):

767

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

768

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

769

dbus_bool)

770

771

approvals_pending = property(_get_approvals_pending,

772

_set_approvals_pending)

773

del _get_approvals_pending, _set_approvals_pending

774

775

@staticmethod

776

def _datetime_to_dbus(dt, variant_level=0):

777

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

778

return dbus.String(dt.isoformat(),

779

variant_level=variant_level)

780

781

def enable(self):

782

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

783

r = Client.enable(self)

784

if oldstate != self.enabled:

785

# Emit D-Bus signals

786

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

787

dbus.Boolean(True, variant_level=1))

788

self.PropertyChanged(

789

dbus.String("LastEnabled"),

790

self._datetime_to_dbus(self.last_enabled,

791

variant_level=1))

792

return r

793

794

def disable(self, quiet = False):

795

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

796

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

797

if not quiet and oldstate != self.enabled:

798

# Emit D-Bus signal

799

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

800

dbus.Boolean(False, variant_level=1))

801

return r

1261

802

1262

803

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

1263

804

try:

1272

813

*args, **kwargs):

1273

814

self.checker_callback_tag = None

1274

815

self.checker = None

816

# Emit D-Bus signal

817

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

818

dbus.Boolean(False, variant_level=1))

1275

819

if os.WIFEXITED(condition):

1276

820

exitstatus = os.WEXITSTATUS(condition)

1277

821

# Emit D-Bus signal

1287

831

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

1288

832

*args, **kwargs)

1289

833

834

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

835

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

836

# Emit D-Bus signal

837

self.PropertyChanged(

838

dbus.String("LastCheckedOK"),

839

(self._datetime_to_dbus(self.last_checked_ok,

840

variant_level=1)))

841

842

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

843

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

844

# Emit D-Bus signal

845

self.PropertyChanged(

846

dbus.String("LastApprovalRequest"),

847

(self._datetime_to_dbus(self.last_approval_request,

848

variant_level=1)))

849

return r

850

1290

851

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

1291

852

old_checker = self.checker

1292

853

if self.checker is not None:

1299

860

and old_checker_pid != self.checker.pid):

1300

861

# Emit D-Bus signal

1301

862

self.CheckerStarted(self.current_checker_command)

863

self.PropertyChanged(

864

dbus.String("CheckerRunning"),

865

dbus.Boolean(True, variant_level=1))

1302

866

return r

1303

867

868

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

869

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

870

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

871

if (old_checker is not None

872

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

873

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

874

dbus.Boolean(False, variant_level=1))

875

return r

876

1304

877

def _reset_approved(self):

1305

self.approved = None

878

self._approved = None

1306

879

return False

1307

880

1308

881

def approve(self, value=True):

1309

882

self.send_changedstate()

1310

self.approved = value

1311

gobject.timeout_add(timedelta_to_milliseconds

883

self._approved = value

884

gobject.timeout_add(self._timedelta_to_milliseconds

1312

885

(self.approval_duration),

1313

886

self._reset_approved)

1314

887

888

1315

889

## 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"}

890

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

1324

891

1325

892

## Signals

1326

893

1412

979

if value is None: # get

1413

980

return dbus.Boolean(self.approved_by_default)

1414

981

self.approved_by_default = bool(value)

982

# Emit D-Bus signal

983

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

984

dbus.Boolean(value, variant_level=1))

1415

985

1416

986

# ApprovalDelay - property

1417

987

@dbus_service_property(_interface, signature="t",

1420

990

if value is None: # get

1421

991

return dbus.UInt64(self.approval_delay_milliseconds())

1422

992

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

993

# Emit D-Bus signal

994

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

995

dbus.UInt64(value, variant_level=1))

1423

996

1424

997

# ApprovalDuration - property

1425

998

@dbus_service_property(_interface, signature="t",

1426

999

access="readwrite")

1427

1000

def ApprovalDuration_dbus_property(self, value=None):

1428

1001

if value is None: # get

1429

return dbus.UInt64(timedelta_to_milliseconds(

1002

return dbus.UInt64(self._timedelta_to_milliseconds(

1430

1003

self.approval_duration))

1431

1004

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

1005

# Emit D-Bus signal

1006

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

1007

dbus.UInt64(value, variant_level=1))

1432

1008

1433

1009

# Name - property

1434

1010

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

1446

1022

def Host_dbus_property(self, value=None):

1447

1023

if value is None: # get

1448

1024

return dbus.String(self.host)

1449

self.host = unicode(value)

1025

self.host = value

1026

# Emit D-Bus signal

1027

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

1028

dbus.String(value, variant_level=1))

1450

1029

1451

1030

# Created - property

1452

1031

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

1453

1032

def Created_dbus_property(self):

1454

return datetime_to_dbus(self.created)

1033

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

1455

1034

1456

1035

# LastEnabled - property

1457

1036

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

1458

1037

def LastEnabled_dbus_property(self):

1459

return datetime_to_dbus(self.last_enabled)

1038

if self.last_enabled is None:

1039

return dbus.String("")

1040

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

1460

1041

1461

1042

# Enabled - property

1462

1043

@dbus_service_property(_interface, signature="b",

1476

1057

if value is not None:

1477

1058

self.checked_ok()

1478

1059

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)

1060

if self.last_checked_ok is None:

1061

return dbus.String("")

1062

return dbus.String(self._datetime_to_dbus(self

1063

.last_checked_ok))

1491

1064

1492

1065

# LastApprovalRequest - property

1493

1066

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

1494

1067

def LastApprovalRequest_dbus_property(self):

1495

return datetime_to_dbus(self.last_approval_request)

1068

if self.last_approval_request is None:

1069

return dbus.String("")

1070

return dbus.String(self.

1071

_datetime_to_dbus(self

1072

.last_approval_request))

1496

1073

1497

1074

# Timeout - property

1498

1075

@dbus_service_property(_interface, signature="t",

1501

1078

if value is None: # get

1502

1079

return dbus.UInt64(self.timeout_milliseconds())

1503

1080

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

1081

# Emit D-Bus signal

1082

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

1083

dbus.UInt64(value, variant_level=1))

1084

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

1085

return

1504

1086

# 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)

1087

gobject.source_remove(self.disable_initiator_tag)

1088

self.disable_initiator_tag = None

1089

time_to_die = (self.

1090

_timedelta_to_milliseconds((self

1091

.last_checked_ok

1092

+ self.timeout)

1093

- datetime.datetime

1094

.utcnow()))

1095

if time_to_die <= 0:

1096

# The timeout has passed

1097

self.disable()

1098

else:

1099

self.disable_initiator_tag = (gobject.timeout_add

1100

(time_to_die, self.disable))

1531

1101

1532

1102

# Interval - property

1533

1103

@dbus_service_property(_interface, signature="t",

1536

1106

if value is None: # get

1537

1107

return dbus.UInt64(self.interval_milliseconds())

1538

1108

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

1109

# Emit D-Bus signal

1110

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

1111

dbus.UInt64(value, variant_level=1))

1539

1112

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

1540

1113

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

1114

# Reschedule checker run

1115

gobject.source_remove(self.checker_initiator_tag)

1116

self.checker_initiator_tag = (gobject.timeout_add

1117

(value, self.start_checker))

1118

self.start_checker() # Start one now, too

1119

1548

1120

# Checker - property

1549

1121

@dbus_service_property(_interface, signature="s",

1550

1122

access="readwrite")

1551

1123

def Checker_dbus_property(self, value=None):

1552

1124

if value is None: # get

1553

1125

return dbus.String(self.checker_command)

1554

self.checker_command = unicode(value)

1126

self.checker_command = value

1127

# Emit D-Bus signal

1128

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

1129

dbus.String(self.checker_command,

1130

variant_level=1))

1555

1131

1556

1132

# CheckerRunning - property

1557

1133

@dbus_service_property(_interface, signature="b",

1584

1160

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

1585

1161

if not self._pipe.recv():

1586

1162

raise KeyError()

1587

1163

1588

1164

def __getattribute__(self, name):

1589

if name == '_pipe':

1165

if(name == '_pipe'):

1590

1166

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

1591

1167

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

1592

1168

data = self._pipe.recv()

1597

1173

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

1598

1174

return self._pipe.recv()[1]

1599

1175

return func

1600

1176

1601

1177

def __setattr__(self, name, value):

1602

if name == '_pipe':

1178

if(name == '_pipe'):

1603

1179

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

1604

1180

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

1605

1181

1606

1182

1607

class ClientDBusTransitional(ClientDBus):

1608

__metaclass__ = AlternateDBusNamesMetaclass

1609

1610

1611

1183

class ClientHandler(socketserver.BaseRequestHandler, object):

1612

1184

"""A class to handle client connections.

1613

1185

1620

1192

unicode(self.client_address))

1621

1193

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

1622

1194

self.server.child_pipe.fileno())

1623

1195

1624

1196

session = (gnutls.connection

1625

1197

.ClientSession(self.request,

1626

1198

gnutls.connection

1627

1199

.X509Credentials()))

1628

1200

1629

1201

# Note: gnutls.connection.X509Credentials is really a

1630

1202

# generic GnuTLS certificate credentials object so long as

1631

1203

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

1632

1204

# here despite using OpenPGP certificates.

1633

1205

1634

1206

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

1635

1207

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

1636

1208

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

1642

1214

(gnutls.library.functions

1643

1215

.gnutls_priority_set_direct(session._c_object,

1644

1216

priority, None))

1645

1217

1646

1218

# Start communication using the Mandos protocol

1647

1219

# Get protocol number

1648

1220

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

1653

1225

except (ValueError, IndexError, RuntimeError) as error:

1654

1226

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

1655

1227

return

1656

1228

1657

1229

# Start GnuTLS connection

1658

1230

try:

1659

1231

session.handshake()

1663

1235

# established. Just abandon the request.

1664

1236

return

1665

1237

logger.debug("Handshake succeeded")

1666

1238

1667

1239

approval_required = False

1668

1240

try:

1669

1241

try:

1674

1246

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

1675

1247

return

1676

1248

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

1677

1249

1678

1250

try:

1679

1251

client = ProxyClient(child_pipe, fpr,

1680

1252

self.client_address)

1688

1260

1689

1261

while True:

1690

1262

if not client.enabled:

1691

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

1263

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

1692

1264

client.name)

1693

1265

if self.server.use_dbus:

1694

1266

# Emit D-Bus signal

1695

client.Rejected("Disabled")

1267

client.Rejected("Disabled")

1696

1268

return

1697

1269

1698

if client.approved or not client.approval_delay:

1270

if client._approved or not client.approval_delay:

1699

1271

#We are approved or approval is disabled

1700

1272

break

1701

elif client.approved is None:

1273

elif client._approved is None:

1702

1274

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

1703

1275

client.name)

1704

1276

if self.server.use_dbus:

1715

1287

return

1716

1288

1717

1289

#wait until timeout or approved

1290

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

1718

1291

time = datetime.datetime.now()

1719

1292

client.changedstate.acquire()

1720

(client.changedstate.wait

1721

(float(client.timedelta_to_milliseconds(delay)

1722

/ 1000)))

1293

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

1723

1294

client.changedstate.release()

1724

1295

time2 = datetime.datetime.now()

1725

1296

if (time2 - time) >= delay:

1741

1312

try:

1742

1313

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

1743

1314

except gnutls.errors.GNUTLSError as error:

1744

logger.warning("gnutls send failed",

1745

exc_info=error)

1315

logger.warning("gnutls send failed")

1746

1316

return

1747

1317

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

1748

1318

sent, len(client.secret)

1749

1319

- (sent_size + sent))

1750

1320

sent_size += sent

1751

1321

1752

1322

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

1753

# bump the timeout using extended_timeout

1754

client.bump_timeout(client.extended_timeout)

1323

# bump the timeout as if seen

1324

client.checked_ok()

1755

1325

if self.server.use_dbus:

1756

1326

# Emit D-Bus signal

1757

1327

client.GotSecret()

1762

1332

try:

1763

1333

session.bye()

1764

1334

except gnutls.errors.GNUTLSError as error:

1765

logger.warning("GnuTLS bye failed",

1766

exc_info=error)

1335

logger.warning("GnuTLS bye failed")

1767

1336

1768

1337

@staticmethod

1769

1338

def peer_certificate(session):

1825

1394

# Convert the buffer to a Python bytestring

1826

1395

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

1827

1396

# Convert the bytestring to hexadecimal notation

1828

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

1397

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

1829

1398

return hex_fpr

1830

1399

1831

1400

1834

1403

def sub_process_main(self, request, address):

1835

1404

try:

1836

1405

self.finish_request(request, address)

1837

except Exception:

1406

except:

1838

1407

self.handle_error(request, address)

1839

1408

self.close_request(request)

1840

1409

1841

1410

def process_request(self, request, address):

1842

1411

"""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

1412

multiprocessing.Process(target = self.sub_process_main,

1413

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

1849

1414

1850

1415

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1851

1416

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

1855

1420

This function creates a new pipe in self.pipe

1856

1421

"""

1857

1422

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1858

1859

proc = MultiprocessingMixIn.process_request(self, request,

1860

client_address)

1423

1424

super(MultiprocessingMixInWithPipe,

1425

self).process_request(request, client_address)

1861

1426

self.child_pipe.close()

1862

self.add_pipe(parent_pipe, proc)

1863

1864

def add_pipe(self, parent_pipe, proc):

1427

self.add_pipe(parent_pipe)

1428

1429

def add_pipe(self, parent_pipe):

1865

1430

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

1866

1431

raise NotImplementedError

1867

1432

1868

1869

1433

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1870

1434

socketserver.TCPServer, object):

1871

1435

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

1945

1509

self.enabled = False

1946

1510

self.clients = clients

1947

1511

if self.clients is None:

1948

self.clients = {}

1512

self.clients = set()

1949

1513

self.use_dbus = use_dbus

1950

1514

self.gnutls_priority = gnutls_priority

1951

1515

IPv6_TCPServer.__init__(self, server_address,

1955

1519

def server_activate(self):

1956

1520

if self.enabled:

1957

1521

return socketserver.TCPServer.server_activate(self)

1958

1959

1522

def enable(self):

1960

1523

self.enabled = True

1961

1962

def add_pipe(self, parent_pipe, proc):

1524

def add_pipe(self, parent_pipe):

1963

1525

# Call "handle_ipc" for both data and EOF events

1964

1526

gobject.io_add_watch(parent_pipe.fileno(),

1965

1527

gobject.IO_IN | gobject.IO_HUP,

1966

1528

functools.partial(self.handle_ipc,

1967

parent_pipe =

1968

parent_pipe,

1969

proc = proc))

1970

1529

parent_pipe = parent_pipe))

1530

1971

1531

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

1972

proc = None, client_object=None):

1532

client_object=None):

1973

1533

condition_names = {

1974

1534

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

1975

1535

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

1984

1544

for cond, name in

1985

1545

condition_names.iteritems()

1986

1546

if cond & condition)

1987

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

1547

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

1988

1548

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

1989

# Wait for other process to exit

1990

proc.join()

1991

1549

return False

1992

1550

1993

1551

# Read a request from the child

1998

1556

fpr = request[1]

1999

1557

address = request[2]

2000

1558

2001

for c in self.clients.itervalues():

1559

for c in self.clients:

2002

1560

if c.fingerprint == fpr:

2003

1561

client = c

2004

1562

break

2005

1563

else:

2006

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

2007

"dress: %s", fpr, address)

1564

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

1565

"dress: %s", fpr, address)

2008

1566

if self.use_dbus:

2009

1567

# Emit D-Bus signal

2010

mandos_dbus_service.ClientNotFound(fpr,

2011

address[0])

1568

mandos_dbus_service.ClientNotFound(fpr, address[0])

2012

1569

parent_pipe.send(False)

2013

1570

return False

2014

1571

2015

1572

gobject.io_add_watch(parent_pipe.fileno(),

2016

1573

gobject.IO_IN | gobject.IO_HUP,

2017

1574

functools.partial(self.handle_ipc,

2018

parent_pipe =

2019

parent_pipe,

2020

proc = proc,

2021

client_object =

2022

client))

1575

parent_pipe = parent_pipe,

1576

client_object = client))

2023

1577

parent_pipe.send(True)

2024

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

2025

# same fileno

1578

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

2026

1579

return False

2027

1580

if command == 'funcall':

2028

1581

funcname = request[1]

2029

1582

args = request[2]

2030

1583

kwargs = request[3]

2031

1584

2032

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

2033

funcname)(*args,

2034

**kwargs)))

2035

1585

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

1586

2036

1587

if command == 'getattr':

2037

1588

attrname = request[1]

2038

1589

if callable(client_object.__getattribute__(attrname)):

2039

1590

parent_pipe.send(('function',))

2040

1591

else:

2041

parent_pipe.send(('data', client_object

2042

.__getattribute__(attrname)))

1592

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

2043

1593

2044

1594

if command == 'setattr':

2045

1595

attrname = request[1]

2046

1596

value = request[2]

2047

1597

setattr(client_object, attrname, value)

2048

1598

2049

1599

return True

2050

1600

2051

1601

2081

1631

elif suffix == "w":

2082

1632

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

2083

1633

else:

2084

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

2085

.format(suffix))

1634

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

2086

1635

except (ValueError, IndexError) as e:

2087

1636

raise ValueError(*(e.args))

2088

1637

timevalue += delta

2089

1638

return timevalue

2090

1639

2091

1640

1641

def if_nametoindex(interface):

1642

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

1643

1644

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

1645

global if_nametoindex

1646

try:

1647

if_nametoindex = (ctypes.cdll.LoadLibrary

1648

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

1649

.if_nametoindex)

1650

except (OSError, AttributeError):

1651

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

1652

def if_nametoindex(interface):

1653

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

1654

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

1655

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

1656

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1657

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

1658

interface))

1659

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

1660

ifreq[16:20])[0]

1661

return interface_index

1662

return if_nametoindex(interface)

1663

1664

2092

1665

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

2093

1666

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

2094

1667

2102

1675

sys.exit()

2103

1676

if not noclose:

2104

1677

# Close all standard open file descriptors

2105

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

1678

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

2106

1679

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

2107

1680

raise OSError(errno.ENODEV,

2108

"{0} not a character device"

2109

.format(os.devnull))

1681

"%s not a character device"

1682

% os.path.devnull)

2110

1683

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

2111

1684

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

2112

1685

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

2121

1694

2122

1695

parser = argparse.ArgumentParser()

2123

1696

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

2124

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

1697

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

2125

1698

help="show version number and exit")

2126

1699

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

2127

1700

help="Bind to interface IF")

2149

1722

" system bus interface")

2150

1723

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

2151

1724

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

1725

options = parser.parse_args()

2159

1726

2160

1727

if options.check:

2173

1740

"use_dbus": "True",

2174

1741

"use_ipv6": "True",

2175

1742

"debuglevel": "",

2176

"restore": "True",

2177

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

2178

1743

}

2179

1744

2180

1745

# Parse config file for server-global settings

2197

1762

# options, if set.

2198

1763

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

2199

1764

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

2200

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

2201

"statedir"):

1765

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

2202

1766

value = getattr(options, option)

2203

1767

if value is not None:

2204

1768

server_settings[option] = value

2216

1780

debuglevel = server_settings["debuglevel"]

2217

1781

use_dbus = server_settings["use_dbus"]

2218

1782

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

1783

2231

1784

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

2232

1785

syslogger.setFormatter(logging.Formatter

2233

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

2234

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

2235

.format(server_settings

2236

["servicename"])))

1786

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

1787

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

1788

% server_settings["servicename"]))

2237

1789

2238

1790

# Parse config file with clients

2239

client_config = configparser.SafeConfigParser(Client

2240

.client_defaults)

1791

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

1792

"interval": "5m",

1793

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

1794

"host": "",

1795

"approval_delay": "0s",

1796

"approval_duration": "1s",

1797

}

1798

client_config = configparser.SafeConfigParser(client_defaults)

2241

1799

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

2242

1800

"clients.conf"))

2243

1801

2257

1815

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

2258

1816

try:

2259

1817

pidfile = open(pidfilename, "w")

2260

except IOError as e:

2261

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

2262

exc_info=e)

1818

except IOError:

1819

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

2263

1820

2264

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

1821

try:

1822

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

1823

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

1824

except KeyError:

2265

1825

try:

2266

uid = pwd.getpwnam(name).pw_uid

2267

gid = pwd.getpwnam(name).pw_gid

2268

break

1826

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

1827

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

2269

1828

except KeyError:

2270

continue

2271

else:

2272

uid = 65534

2273

gid = 65534

1829

try:

1830

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

1831

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

1832

except KeyError:

1833

uid = 65534

1834

gid = 65534

2274

1835

try:

2275

1836

os.setgid(gid)

2276

1837

os.setuid(uid)

2278

1839

if error[0] != errno.EPERM:

2279

1840

raise error

2280

1841

1842

if not debug and not debuglevel:

1843

syslogger.setLevel(logging.WARNING)

1844

console.setLevel(logging.WARNING)

1845

if debuglevel:

1846

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

1847

syslogger.setLevel(level)

1848

console.setLevel(level)

1849

2281

1850

if debug:

2282

1851

# Enable all possible GnuTLS debugging

2283

1852

2293

1862

.gnutls_global_set_log_function(debug_gnutls))

2294

1863

2295

1864

# Redirect stdin so all checkers get /dev/null

2296

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

1865

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

2297

1866

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

2298

1867

if null > 2:

2299

1868

os.close(null)

1869

else:

1870

# No console logging

1871

logger.removeHandler(console)

2300

1872

2301

1873

# Need to fork before connecting to D-Bus

2302

1874

if not debug:

2303

1875

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

2304

1876

daemon()

2305

1877

2306

gobject.threads_init()

2307

2308

1878

global main_loop

2309

1879

# From the Avahi example code

2310

DBusGMainLoop(set_as_default=True)

1880

DBusGMainLoop(set_as_default=True )

2311

1881

main_loop = gobject.MainLoop()

2312

1882

bus = dbus.SystemBus()

2313

1883

# End of Avahi example code

2314

1884

if use_dbus:

2315

1885

try:

2316

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

1886

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

2317

1887

bus, do_not_queue=True)

2318

old_bus_name = (dbus.service.BusName

2319

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

2320

do_not_queue=True))

2321

1888

except dbus.exceptions.NameExistsException as e:

2322

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

1889

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

2323

1890

use_dbus = False

2324

1891

server_settings["use_dbus"] = False

2325

1892

tcp_server.use_dbus = False

2326

1893

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)

1894

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

1895

servicetype = "_mandos._tcp",

1896

protocol = protocol, bus = bus)

2331

1897

if server_settings["interface"]:

2332

1898

service.interface = (if_nametoindex

2333

1899

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

2337

1903

2338

1904

client_class = Client

2339

1905

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))

1906

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

1907

def client_config_items(config, section):

1908

special_settings = {

1909

"approved_by_default":

1910

lambda: config.getboolean(section,

1911

"approved_by_default"),

1912

}

1913

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

2412

1914

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

1915

yield (name, special_settings[name]())

1916

except KeyError:

1917

yield (name, value)

1918

1919

tcp_server.clients.update(set(

1920

client_class(name = section,

1921

config= dict(client_config_items(

1922

client_config, section)))

1923

for section in client_config.sections()))

2437

1924

if not tcp_server.clients:

2438

1925

logger.warning("No clients defined")

2439

1926

2440

1927

if not debug:

2441

1928

try:

2442

1929

with pidfile:

2450

1937

# "pidfile" was never created

2451

1938

pass

2452

1939

del pidfilename

1940

2453

1941

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

2454

1942

2455

1943

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

2456

1944

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

2457

1945

2458

1946

if use_dbus:

2459

class MandosDBusService(DBusObjectWithProperties):

1947

class MandosDBusService(dbus.service.Object):

2460

1948

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

2461

1949

def __init__(self):

2462

1950

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"}

1951

_interface = "se.bsnet.fukt.Mandos"

2470

1952

2471

1953

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

2472

1954

def ClientAdded(self, objpath):

2487

1969

def GetAllClients(self):

2488

1970

"D-Bus method"

2489

1971

return dbus.Array(c.dbus_object_path

2490

for c in

2491

tcp_server.clients.itervalues())

1972

for c in tcp_server.clients)

2492

1973

2493

1974

@dbus.service.method(_interface,

2494

1975

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

2496

1977

"D-Bus method"

2497

1978

return dbus.Dictionary(

2498

1979

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

2499

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

1980

for c in tcp_server.clients),

2500

1981

signature="oa{sv}")

2501

1982

2502

1983

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

2503

1984

def RemoveClient(self, object_path):

2504

1985

"D-Bus method"

2505

for c in tcp_server.clients.itervalues():

1986

for c in tcp_server.clients:

2506

1987

if c.dbus_object_path == object_path:

2507

del tcp_server.clients[c.name]

1988

tcp_server.clients.remove(c)

2508

1989

c.remove_from_connection()

2509

1990

# Don't signal anything except ClientRemoved

2510

1991

c.disable(quiet=True)

2515

1996

2516

1997

del _interface

2517

1998

2518

class MandosDBusServiceTransitional(MandosDBusService):

2519

__metaclass__ = AlternateDBusNamesMetaclass

2520

mandos_dbus_service = MandosDBusServiceTransitional()

1999

mandos_dbus_service = MandosDBusService()

2521

2000

2522

2001

def cleanup():

2523

2002

"Cleanup function; run on exit"

2524

2003

service.cleanup()

2525

2004

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

2005

while tcp_server.clients:

2582

name, client = tcp_server.clients.popitem()

2006

client = tcp_server.clients.pop()

2583

2007

if use_dbus:

2584

2008

client.remove_from_connection()

2009

client.disable_hook = None

2585

2010

# Don't signal anything except ClientRemoved

2586

2011

client.disable(quiet=True)

2587

2012

if use_dbus:

2588

2013

# Emit D-Bus signal

2589

mandos_dbus_service.ClientRemoved(client

2590

.dbus_object_path,

2014

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2591

2015

client.name)

2592

client_settings.clear()

2593

2016

2594

2017

atexit.register(cleanup)

2595

2018

2596

for client in tcp_server.clients.itervalues():

2019

for client in tcp_server.clients:

2597

2020

if use_dbus:

2598

2021

# Emit D-Bus signal

2599

2022

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2600

# Need to initiate checking of clients

2601

if client.enabled:

2602

client.init_checker()

2023

client.enable()

2603

2024

2604

2025

tcp_server.enable()

2605

2026

tcp_server.server_activate()

2608

2029

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

2609

2030

if use_ipv6:

2610

2031

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

2611

" flowinfo %d, scope_id %d",

2612

*tcp_server.socket.getsockname())

2032

" flowinfo %d, scope_id %d"

2033

% tcp_server.socket.getsockname())

2613

2034

else: # IPv4

2614

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

2615

*tcp_server.socket.getsockname())

2035

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

2036

% tcp_server.socket.getsockname())

2616

2037

2617

2038

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

2618

2039

2621

2042

try:

2622

2043

service.activate()

2623

2044

except dbus.exceptions.DBusException as error:

2624

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

2045

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

2625

2046

cleanup()

2626

2047

sys.exit(1)

2627

2048

# End of Avahi example code

2634

2055

logger.debug("Starting main loop")

2635

2056

main_loop.run()

2636

2057

except AvahiError as error:

2637

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

2058

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

2638

2059

cleanup()

2639

2060

sys.exit(1)

2640

2061

except KeyboardInterrupt: