/mandos/trunk : revision 569

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

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#

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# Everything else is

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#

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

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

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# along with this program. If not, see

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

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#

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

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

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#

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from __future__ import (division, absolute_import, print_function,

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import dbus

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import dbus.service

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import ctypes.util

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import xml.dom.minidom

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import inspect

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import GnuPGInterface

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.3.1"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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version = "1.5.3"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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

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"""init logger and add loglevel"""

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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

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pass

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class PGPEngine(object):

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

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def __init__(self):

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self.gnupg = GnuPGInterface.GnuPG()

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

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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

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'--quiet',

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'--no-use-agent'])

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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def encrypt(self, data, password):

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

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

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return ciphertext

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def decrypt(self, data, password):

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

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

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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decrypted_plaintext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return decrypted_plaintext

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class AvahiError(Exception):

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

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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

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self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

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

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self.name)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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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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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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unicode(error))

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raise AvahiGroupError("State changed: %s"

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% unicode(error))

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

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.format(error))

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def cleanup(self):

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

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if self.group is not None:

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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException) as e:

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dbus.exceptions.DBusException):

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pass

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self.group = None

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self.remove()

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

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Attributes:

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

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

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

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

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

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

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checker_initiator_tag: a gobject event source tag, or None

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

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client_structure: Object describing what attributes a client has

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and is used for storing the client at exit

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current_checker_command: string; current running checker_command

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

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disable_initiator_tag: a gobject event source tag, or None

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enabled: bool()

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

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

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

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

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last_enabled: datetime.datetime(); (UTC)

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last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, -2 means no checker completed yet.

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

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

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D-Bus identifiers

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

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

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until this client is disabled

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extended_timeout: extra long timeout when password has been sent

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extended_timeout: extra long timeout when secret has been sent

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runtime_expansions: Allowed attributes for runtime expansion.

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

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disabled, or None

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

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

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

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

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"extended_timeout": "15m",

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"interval": "2m",

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

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"host": "",

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"approval_delay": "0s",

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"approval_duration": "1s",

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"approved_by_default": "True",

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"enabled": "True",

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}

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def timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

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return _timedelta_to_milliseconds(self.timeout)

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return timedelta_to_milliseconds(self.timeout)

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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return _timedelta_to_milliseconds(self.extended_timeout)

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return timedelta_to_milliseconds(self.extended_timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return _timedelta_to_milliseconds(self.interval)

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return timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

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return _timedelta_to_milliseconds(self.approval_delay)

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

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return timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

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def config_parser(config):

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

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

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with exceptions for any special settings as defined above.

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

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value given the same arguments.

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"""

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settings = {}

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for client_name in config.sections():

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section = dict(config.items(client_name))

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client = settings[client_name] = {}

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

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# Reformat values from string types to Python types

477

client["approved_by_default"] = config.getboolean(

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client_name, "approved_by_default")

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

480

"enabled")

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

483

.replace(" ", ""))

484

if "secret" in section:

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

486

elif "secfile" in section:

487

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

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(section["secfile"])),

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"rb") as secfile:

490

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

491

else:

492

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"]

503

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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507

return settings

508

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510

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

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

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512

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

336

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attribute."""

337

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self.name = name

338

if config is None:

339

config = {}

515

# adding all client settings

516

for setting, value in settings.iteritems():

517

setattr(self, setting, value)

518

519

if self.enabled:

520

if not hasattr(self, "last_enabled"):

521

self.last_enabled = datetime.datetime.utcnow()

522

if not hasattr(self, "expires"):

523

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

524

+ self.timeout)

525

else:

526

self.last_enabled = None

527

self.expires = None

528

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

341

530

# Uppercase and remove spaces from fingerprint for later

342

531

# comparison purposes with return value from the fingerprint()

343

532

# function

344

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

345

.replace(" ", ""))

346

533

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

347

if "secret" in config:

348

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

349

elif "secfile" in config:

350

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

351

(config["secfile"])),

352

"rb") as secfile:

353

self.secret = secfile.read()

354

else:

355

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

356

% self.name)

357

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

358

self.created = datetime.datetime.utcnow()

359

self.enabled = False

360

self.last_approval_request = None

361

self.last_enabled = None

362

self.last_checked_ok = None

363

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

364

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

365

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

366

self.disable_hook = disable_hook

534

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

535

datetime.datetime.utcnow())

536

537

# attributes specific for this server instance

367

538

self.checker = None

368

539

self.checker_initiator_tag = None

369

540

self.disable_initiator_tag = None

370

self.expires = None

371

541

self.checker_callback_tag = None

372

self.checker_command = config["checker"]

373

542

self.current_checker_command = None

374

self.last_connect = None

375

self._approved = None

376

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

377

True)

543

self.approved = None

378

544

self.approvals_pending = 0

379

self.approval_delay = string_to_delta(

380

config["approval_delay"])

381

self.approval_duration = string_to_delta(

382

config["approval_duration"])

383

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

545

self.changedstate = (multiprocessing_manager

546

.Condition(multiprocessing_manager

547

.Lock()))

548

self.client_structure = [attr for attr in

549

self.__dict__.iterkeys()

550

if not attr.startswith("_")]

551

self.client_structure.append("client_structure")

552

553

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

554

lambda obj:

555

isinstance(obj,

556

property)):

557

if not name.startswith("_"):

558

self.client_structure.append(name)

384

559

560

# Send notice to process children that client state has changed

385

561

def send_changedstate(self):

386

self.changedstate.acquire()

387

self.changedstate.notify_all()

388

self.changedstate.release()

389

562

with self.changedstate:

563

self.changedstate.notify_all()

564

390

565

def enable(self):

391

566

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

392

567

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

393

568

# Already enabled

394

569

return

395

570

self.send_changedstate()

396

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

397

# and every interval from then on.

398

self.checker_initiator_tag = (gobject.timeout_add

399

(self.interval_milliseconds(),

400

self.start_checker))

401

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

402

571

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

403

self.disable_initiator_tag = (gobject.timeout_add

404

(self.timeout_milliseconds(),

405

self.disable))

406

572

self.enabled = True

407

573

self.last_enabled = datetime.datetime.utcnow()

408

# Also start a new checker *right now*.

409

self.start_checker()

574

self.init_checker()

410

575

411

576

def disable(self, quiet=True):

412

577

"""Disable this client."""

424

589

gobject.source_remove(self.checker_initiator_tag)

425

590

self.checker_initiator_tag = None

426

591

self.stop_checker()

427

if self.disable_hook:

428

self.disable_hook(self)

429

592

self.enabled = False

430

593

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

431

594

return False

432

595

433

596

def __del__(self):

434

self.disable_hook = None

435

597

self.disable()

436

598

599

def init_checker(self):

600

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

601

# and every interval from then on.

602

self.checker_initiator_tag = (gobject.timeout_add

603

(self.interval_milliseconds(),

604

self.start_checker))

605

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

606

self.disable_initiator_tag = (gobject.timeout_add

607

(self.timeout_milliseconds(),

608

self.disable))

609

# Also start a new checker *right now*.

610

self.start_checker()

611

437

612

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

438

613

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

439

614

self.checker_callback_tag = None

440

615

self.checker = None

441

616

if os.WIFEXITED(condition):

442

exitstatus = os.WEXITSTATUS(condition)

443

if exitstatus == 0:

617

self.last_checker_status = os.WEXITSTATUS(condition)

618

if self.last_checker_status == 0:

444

619

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

445

620

vars(self))

446

621

self.checked_ok()

448

623

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

449

624

vars(self))

450

625

else:

626

self.last_checker_status = -1

451

627

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

452

628

vars(self))

453

629

454

def checked_ok(self, timeout=None):

455

"""Bump up the timeout for this client.

456

457

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

458

alive and well.

459

"""

630

def checked_ok(self):

631

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

632

self.last_checked_ok = datetime.datetime.utcnow()

633

self.last_checker_status = 0

634

self.bump_timeout()

635

636

def bump_timeout(self, timeout=None):

637

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

460

638

if timeout is None:

461

639

timeout = self.timeout

462

self.last_checked_ok = datetime.datetime.utcnow()

463

gobject.source_remove(self.disable_initiator_tag)

464

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

465

self.disable_initiator_tag = (gobject.timeout_add

466

(_timedelta_to_milliseconds(timeout),

467

self.disable))

640

if self.disable_initiator_tag is not None:

641

gobject.source_remove(self.disable_initiator_tag)

642

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

643

self.disable_initiator_tag = (gobject.timeout_add

644

(timedelta_to_milliseconds

645

(timeout), self.disable))

646

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

468

647

469

648

def need_approval(self):

470

649

self.last_approval_request = datetime.datetime.utcnow()

514

693

try:

515

694

command = self.checker_command % escaped_attrs

516

695

except TypeError as error:

517

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

518

' %s', self.checker_command, error)

696

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

697

self.checker_command, exc_info=error)

519

698

return True # Try again later

520

699

self.current_checker_command = command

521

700

try:

539

718

gobject.source_remove(self.checker_callback_tag)

540

719

self.checker_callback(pid, status, command)

541

720

except OSError as error:

542

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

543

error)

721

logger.error("Failed to start subprocess",

722

exc_info=error)

544

723

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

545

724

return True

546

725

553

732

return

554

733

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

555

734

try:

556

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

735

self.checker.terminate()

557

736

#time.sleep(0.5)

558

737

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

559

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

738

# self.checker.kill()

560

739

except OSError as error:

561

740

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

562

741

raise

579

758

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

580

759

if byte_arrays and signature != "ay":

581

760

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

582

" signature %r" % signature)

761

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

583

762

def decorator(func):

584

763

func._dbus_is_property = True

585

764

func._dbus_interface = dbus_interface

593

772

return decorator

594

773

595

774

775

def dbus_interface_annotations(dbus_interface):

776

"""Decorator for marking functions returning interface annotations.

777

778

Usage:

779

780

@dbus_interface_annotations("org.example.Interface")

781

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

782

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

783

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

784

"false"}

785

"""

786

def decorator(func):

787

func._dbus_is_interface = True

788

func._dbus_interface = dbus_interface

789

func._dbus_name = dbus_interface

790

return func

791

return decorator

792

793

794

def dbus_annotations(annotations):

795

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

796

Usage:

797

798

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

799

access="r")

800

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

801

"org.freedesktop.DBus.Property."

802

"EmitsChangedSignal": "false"})

803

def Property_dbus_property(self):

804

return dbus.Boolean(False)

805

"""

806

def decorator(func):

807

func._dbus_annotations = annotations

808

return func

809

return decorator

810

811

596

812

class DBusPropertyException(dbus.exceptions.DBusException):

597

813

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

598

814

"""

621

837

"""

622

838

623

839

@staticmethod

624

def _is_dbus_property(obj):

625

return getattr(obj, "_dbus_is_property", False)

840

def _is_dbus_thing(thing):

841

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

842

843

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

844

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

845

"""

846

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

847

False)

626

848

627

def _get_all_dbus_properties(self):

849

def _get_all_dbus_things(self, thing):

628

850

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

629

851

"""

630

return ((prop.__get__(self)._dbus_name, prop.__get__(self))

852

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

853

name),

854

athing.__get__(self))

631

855

for cls in self.__class__.__mro__

632

for name, prop in inspect.getmembers(cls, self._is_dbus_property))

856

for name, athing in

857

inspect.getmembers(cls,

858

self._is_dbus_thing(thing)))

633

859

634

860

def _get_dbus_property(self, interface_name, property_name):

635

861

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

636

862

property with the specified name and interface.

637

863

"""

638

864

for cls in self.__class__.__mro__:

639

for name, value in inspect.getmembers(cls, self._is_dbus_property):

640

if value._dbus_name == property_name and value._dbus_interface == interface_name:

865

for name, value in (inspect.getmembers

866

(cls,

867

self._is_dbus_thing("property"))):

868

if (value._dbus_name == property_name

869

and value._dbus_interface == interface_name):

641

870

return value.__get__(self)

642

871

643

872

# No such property

644

873

raise DBusPropertyNotFound(self.dbus_object_path + ":"

645

874

+ interface_name + "."

646

875

+ property_name)

647

648

876

649

877

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

650

878

out_signature="v")

671

899

# signatures other than "ay".

672

900

if prop._dbus_signature != "ay":

673

901

raise ValueError

674

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

675

for byte in value))

902

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

903

for byte in value))

676

904

prop(value)

677

905

678

906

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

683

911

684

912

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

685

913

"""

686

all = {}

687

for name, prop in self._get_all_dbus_properties():

914

properties = {}

915

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

688

916

if (interface_name

689

917

and interface_name != prop._dbus_interface):

690

918

# Interface non-empty but did not match

694

922

continue

695

923

value = prop()

696

924

if not hasattr(value, "variant_level"):

697

all[name] = value

925

properties[name] = value

698

926

continue

699

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

700

value.variant_level+1)

701

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

927

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

928

value.variant_level+1)

929

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

702

930

703

931

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

704

932

out_signature="s",

705

933

path_keyword='object_path',

706

934

connection_keyword='connection')

707

935

def Introspect(self, object_path, connection):

708

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

936

"""Overloading of standard D-Bus method.

937

938

Inserts property tags and interface annotation tags.

709

939

"""

710

940

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

711

941

connection)

718

948

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

719

949

return e

720

950

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

951

# Add property tags

721

952

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

722

953

for name, prop

723

in self._get_all_dbus_properties()

954

in self._get_all_dbus_things("property")

724

955

if prop._dbus_interface

725

956

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

726

957

if_tag.appendChild(tag)

958

# Add annotation tags

959

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

960

for tag in if_tag.getElementsByTagName(typ):

961

annots = dict()

962

for name, prop in (self.

963

_get_all_dbus_things(typ)):

964

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

965

and prop._dbus_interface

966

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

967

annots.update(getattr

968

(prop,

969

"_dbus_annotations",

970

{}))

971

for name, value in annots.iteritems():

972

ann_tag = document.createElement(

973

"annotation")

974

ann_tag.setAttribute("name", name)

975

ann_tag.setAttribute("value", value)

976

tag.appendChild(ann_tag)

977

# Add interface annotation tags

978

for annotation, value in dict(

979

itertools.chain(

980

*(annotations().iteritems()

981

for name, annotations in

982

self._get_all_dbus_things("interface")

983

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

984

))).iteritems():

985

ann_tag = document.createElement("annotation")

986

ann_tag.setAttribute("name", annotation)

987

ann_tag.setAttribute("value", value)

988

if_tag.appendChild(ann_tag)

727

989

# Add the names to the return values for the

728

990

# "org.freedesktop.DBus.Properties" methods

729

991

if (if_tag.getAttribute("name")

744

1006

except (AttributeError, xml.dom.DOMException,

745

1007

xml.parsers.expat.ExpatError) as error:

746

1008

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

747

error)

1009

exc_info=error)

748

1010

return xmlstring

749

1011

750

1012

755

1017

return dbus.String(dt.isoformat(),

756

1018

variant_level=variant_level)

757

1019

758

class transitional_dbus_metaclass(DBusObjectWithProperties.__metaclass__):

1020

1021

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

1022

.__metaclass__):

1023

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

1024

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

1025

"""

759

1026

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

760

for attrname, old_dbusobj in inspect.getmembers(bases[0]):

761

new_interface = getattr(old_dbusobj, "_dbus_interface", "").replace("se.bsnet.fukt.", "se.recompile.")

762

if (getattr(old_dbusobj, "_dbus_is_signal", False)

763

and old_dbusobj._dbus_interface.startswith("se.bsnet.fukt.Mandos")):

764

unwrappedfunc = dict(zip(old_dbusobj.func_code.co_freevars,

765

old_dbusobj.__closure__))["func"].cell_contents

766

newfunc = types.FunctionType(unwrappedfunc.func_code,

767

unwrappedfunc.func_globals,

768

unwrappedfunc.func_name,

769

unwrappedfunc.func_defaults,

770

unwrappedfunc.func_closure)

771

new_dbusfunc = dbus.service.signal(

772

new_interface, old_dbusobj._dbus_signature)(newfunc)

773

attr["_transitional_" + attrname] = new_dbusfunc

774

775

def fixscope(func1, func2):

776

def newcall(*args, **kwargs):

777

func1(*args, **kwargs)

778

func2(*args, **kwargs)

779

return newcall

780

781

attr[attrname] = fixscope(old_dbusobj, new_dbusfunc)

782

783

elif (getattr(old_dbusobj, "_dbus_is_method", False)

784

and old_dbusobj._dbus_interface.startswith("se.bsnet.fukt.Mandos")):

785

new_dbusfunc = (dbus.service.method

786

(new_interface,

787

old_dbusobj._dbus_in_signature,

788

old_dbusobj._dbus_out_signature)

789

(types.FunctionType

790

(old_dbusobj.func_code,

791

old_dbusobj.func_globals,

792

old_dbusobj.func_name,

793

old_dbusobj.func_defaults,

794

old_dbusobj.func_closure)))

795

796

attr[attrname] = new_dbusfunc

797

elif (getattr(old_dbusobj, "_dbus_is_property", False)

798

and old_dbusobj._dbus_interface.startswith("se.bsnet.fukt.Mandos")):

799

new_dbusfunc = (dbus_service_property

800

(new_interface,

801

old_dbusobj._dbus_signature,

802

old_dbusobj._dbus_access,

803

old_dbusobj._dbus_get_args_options["byte_arrays"])

804

(types.FunctionType

805

(old_dbusobj.func_code,

806

old_dbusobj.func_globals,

807

old_dbusobj.func_name,

808

old_dbusobj.func_defaults,

809

old_dbusobj.func_closure)))

810

811

attr[attrname] = new_dbusfunc

1027

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

1028

# methods, signals, or properties in them

1029

old_interface_names = []

1030

for base in (b for b in bases

1031

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

1032

# Go though all attributes of the base class

1033

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

1034

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

1035

# with the wrong interface name

1036

if (not hasattr(attribute, "_dbus_interface")

1037

or not attribute._dbus_interface

1038

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

1039

continue

1040

# Create an alternate D-Bus interface name based on

1041

# the current name

1042

alt_interface = (attribute._dbus_interface

1043

.replace("se.recompile.Mandos",

1044

"se.bsnet.fukt.Mandos"))

1045

if alt_interface != attribute._dbus_interface:

1046

old_interface_names.append(alt_interface)

1047

# Is this a D-Bus signal?

1048

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

1049

# Extract the original non-method function by

1050

# black magic

1051

nonmethod_func = (dict(

1052

zip(attribute.func_code.co_freevars,

1053

attribute.__closure__))["func"]

1054

.cell_contents)

1055

# Create a new, but exactly alike, function

1056

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

1057

# with the alternate D-Bus interface name

1058

new_function = (dbus.service.signal

1059

(alt_interface,

1060

attribute._dbus_signature)

1061

(types.FunctionType(

1062

nonmethod_func.func_code,

1063

nonmethod_func.func_globals,

1064

nonmethod_func.func_name,

1065

nonmethod_func.func_defaults,

1066

nonmethod_func.func_closure)))

1067

# Copy annotations, if any

1068

try:

1069

new_function._dbus_annotations = (

1070

dict(attribute._dbus_annotations))

1071

except AttributeError:

1072

pass

1073

# Define a creator of a function to call both the

1074

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

1075

# signals gets sent when the function is called

1076

def fixscope(func1, func2):

1077

"""This function is a scope container to pass

1078

func1 and func2 to the "call_both" function

1079

outside of its arguments"""

1080

def call_both(*args, **kwargs):

1081

"""This function will emit two D-Bus

1082

signals by calling func1 and func2"""

1083

func1(*args, **kwargs)

1084

func2(*args, **kwargs)

1085

return call_both

1086

# Create the "call_both" function and add it to

1087

# the class

1088

attr[attrname] = fixscope(attribute,

1089

new_function)

1090

# Is this a D-Bus method?

1091

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

1092

# Create a new, but exactly alike, function

1093

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

1094

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

1095

# to the class.

1096

attr[attrname] = (dbus.service.method

1097

(alt_interface,

1098

attribute._dbus_in_signature,

1099

attribute._dbus_out_signature)

1100

(types.FunctionType

1101

(attribute.func_code,

1102

attribute.func_globals,

1103

attribute.func_name,

1104

attribute.func_defaults,

1105

attribute.func_closure)))

1106

# Copy annotations, if any

1107

try:

1108

attr[attrname]._dbus_annotations = (

1109

dict(attribute._dbus_annotations))

1110

except AttributeError:

1111

pass

1112

# Is this a D-Bus property?

1113

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

1114

# Create a new, but exactly alike, function

1115

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

1116

# property with the alternate D-Bus interface

1117

# name. Add it to the class.

1118

attr[attrname] = (dbus_service_property

1119

(alt_interface,

1120

attribute._dbus_signature,

1121

attribute._dbus_access,

1122

attribute

1123

._dbus_get_args_options

1124

["byte_arrays"])

1125

(types.FunctionType

1126

(attribute.func_code,

1127

attribute.func_globals,

1128

attribute.func_name,

1129

attribute.func_defaults,

1130

attribute.func_closure)))

1131

# Copy annotations, if any

1132

try:

1133

attr[attrname]._dbus_annotations = (

1134

dict(attribute._dbus_annotations))

1135

except AttributeError:

1136

pass

1137

# Is this a D-Bus interface?

1138

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

1139

# Create a new, but exactly alike, function

1140

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

1141

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

1142

# to the class.

1143

attr[attrname] = (dbus_interface_annotations

1144

(alt_interface)

1145

(types.FunctionType

1146

(attribute.func_code,

1147

attribute.func_globals,

1148

attribute.func_name,

1149

attribute.func_defaults,

1150

attribute.func_closure)))

1151

# Deprecate all old interfaces

1152

basename="_AlternateDBusNamesMetaclass_interface_annotation{0}"

1153

for old_interface_name in old_interface_names:

1154

@dbus_interface_annotations(old_interface_name)

1155

def func(self):

1156

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

1157

# Find an unused name

1158

for aname in (basename.format(i) for i in

1159

itertools.count()):

1160

if aname not in attr:

1161

attr[aname] = func

1162

break

812

1163

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

813

1164

1165

814

1166

class ClientDBus(Client, DBusObjectWithProperties):

815

1167

"""A Client class using D-Bus

816

1168

825

1177

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

826

1178

827

1179

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

828

self._approvals_pending = 0

829

1180

self.bus = bus

830

1181

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

831

1182

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

841

1192

def notifychangeproperty(transform_func,

842

1193

dbus_name, type_func=lambda x: x,

843

1194

variant_level=1):

844

""" Modify a variable so that its a property that announce its

845

changes to DBus.

846

transform_fun: Function that takes a value and transform it to

847

DBus type.

848

dbus_name: DBus name of the variable

1195

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

1196

its changes to DBus.

1197

1198

transform_fun: Function that takes a value and a variant_level

1199

and transforms it to a D-Bus type.

1200

dbus_name: D-Bus name of the variable

849

1201

type_func: Function that transform the value before sending it

850

to DBus

851

variant_level: DBus variant level. default: 1

1202

to the D-Bus. Default: no transform

1203

variant_level: D-Bus variant level. Default: 1

852

1204

"""

853

real_value = [None,]

1205

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

854

1206

def setter(self, value):

855

old_value = real_value[0]

856

real_value[0] = value

857

1207

if hasattr(self, "dbus_object_path"):

858

if type_func(old_value) != type_func(real_value[0]):

859

dbus_value = transform_func(type_func(real_value[0]),

860

variant_level)

1208

if (not hasattr(self, attrname) or

1209

type_func(getattr(self, attrname, None))

1210

!= type_func(value)):

1211

dbus_value = transform_func(type_func(value),

1212

variant_level

1213

=variant_level)

861

1214

self.PropertyChanged(dbus.String(dbus_name),

862

1215

dbus_value)

1216

setattr(self, attrname, value)

863

1217

864

return property(lambda self: real_value[0], setter)

1218

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

865

1219

866

1220

867

1221

expires = notifychangeproperty(datetime_to_dbus, "Expires")

872

1226

last_enabled = notifychangeproperty(datetime_to_dbus,

873

1227

"LastEnabled")

874

1228

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

875

type_func = lambda checker: checker is not None)

1229

type_func = lambda checker:

1230

checker is not None)

876

1231

last_checked_ok = notifychangeproperty(datetime_to_dbus,

877

1232

"LastCheckedOK")

878

last_approval_request = notifychangeproperty(datetime_to_dbus,

879

"LastApprovalRequest")

1233

last_checker_status = notifychangeproperty(dbus.Int16,

1234

"LastCheckerStatus")

1235

last_approval_request = notifychangeproperty(

1236

datetime_to_dbus, "LastApprovalRequest")

880

1237

approved_by_default = notifychangeproperty(dbus.Boolean,

881

1238

"ApprovedByDefault")

882

approval_delay = notifychangeproperty(dbus.UInt16, "ApprovalDelay",

883

type_func = _timedelta_to_milliseconds)

884

approval_duration = notifychangeproperty(dbus.UInt16, "ApprovalDuration",

885

type_func = _timedelta_to_milliseconds)

1239

approval_delay = notifychangeproperty(dbus.UInt64,

1240

"ApprovalDelay",

1241

type_func =

1242

timedelta_to_milliseconds)

1243

approval_duration = notifychangeproperty(

1244

dbus.UInt64, "ApprovalDuration",

1245

type_func = timedelta_to_milliseconds)

886

1246

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

887

timeout = notifychangeproperty(dbus.UInt16, "Timeout",

888

type_func = _timedelta_to_milliseconds)

889

extended_timeout = notifychangeproperty(dbus.UInt16, "ExtendedTimeout",

890

type_func = _timedelta_to_milliseconds)

891

interval = notifychangeproperty(dbus.UInt16, "Interval",

892

type_func = _timedelta_to_milliseconds)

1247

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

1248

type_func =

1249

timedelta_to_milliseconds)

1250

extended_timeout = notifychangeproperty(

1251

dbus.UInt64, "ExtendedTimeout",

1252

type_func = timedelta_to_milliseconds)

1253

interval = notifychangeproperty(dbus.UInt64,

1254

"Interval",

1255

type_func =

1256

timedelta_to_milliseconds)

893

1257

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

894

1258

895

1259

del notifychangeproperty

937

1301

return r

938

1302

939

1303

def _reset_approved(self):

940

self._approved = None

1304

self.approved = None

941

1305

return False

942

1306

943

1307

def approve(self, value=True):

944

1308

self.send_changedstate()

945

self._approved = value

946

gobject.timeout_add(_timedelta_to_milliseconds

1309

self.approved = value

1310

gobject.timeout_add(timedelta_to_milliseconds

947

1311

(self.approval_duration),

948

1312

self._reset_approved)

949

1313

950

1314

951

1315

## D-Bus methods, signals & properties

952

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

953

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"}

1324

954

1325

## Signals

955

1326

956

1327

# CheckerCompleted - signal

1055

1426

access="readwrite")

1056

1427

def ApprovalDuration_dbus_property(self, value=None):

1057

1428

if value is None: # get

1058

return dbus.UInt64(_timedelta_to_milliseconds(

1429

return dbus.UInt64(timedelta_to_milliseconds(

1059

1430

self.approval_duration))

1060

1431

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

1061

1432

1075

1446

def Host_dbus_property(self, value=None):

1076

1447

if value is None: # get

1077

1448

return dbus.String(self.host)

1078

self.host = value

1449

self.host = unicode(value)

1079

1450

1080

1451

# Created - property

1081

1452

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

1082

1453

def Created_dbus_property(self):

1083

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

1454

return datetime_to_dbus(self.created)

1084

1455

1085

1456

# LastEnabled - property

1086

1457

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

1107

1478

return

1108

1479

return datetime_to_dbus(self.last_checked_ok)

1109

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

1110

1487

# Expires - property

1111

1488

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

1112

1489

def Expires_dbus_property(self):

1124

1501

if value is None: # get

1125

1502

return dbus.UInt64(self.timeout_milliseconds())

1126

1503

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

1127

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

1128

return

1129

1504

# Reschedule timeout

1130

gobject.source_remove(self.disable_initiator_tag)

1131

self.disable_initiator_tag = None

1132

self.expires = None

1133

time_to_die = (self.

1134

_timedelta_to_milliseconds((self

1135

.last_checked_ok

1136

+ self.timeout)

1137

- datetime.datetime

1138

.utcnow()))

1139

if time_to_die <= 0:

1140

# The timeout has passed

1141

self.disable()

1142

else:

1143

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

1144

+ datetime.timedelta(milliseconds = time_to_die))

1145

self.disable_initiator_tag = (gobject.timeout_add

1146

(time_to_die, self.disable))

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))

1147

1523

1148

1524

# ExtendedTimeout - property

1149

1525

@dbus_service_property(_interface, signature="t",

1162

1538

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

1163

1539

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

1164

1540

return

1165

# Reschedule checker run

1166

gobject.source_remove(self.checker_initiator_tag)

1167

self.checker_initiator_tag = (gobject.timeout_add

1168

(value, self.start_checker))

1169

self.start_checker() # Start one now, too

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

1170

1547

1171

1548

# Checker - property

1172

1549

@dbus_service_property(_interface, signature="s",

1174

1551

def Checker_dbus_property(self, value=None):

1175

1552

if value is None: # get

1176

1553

return dbus.String(self.checker_command)

1177

self.checker_command = value

1554

self.checker_command = unicode(value)

1178

1555

1179

1556

# CheckerRunning - property

1180

1557

@dbus_service_property(_interface, signature="b",

1209

1586

raise KeyError()

1210

1587

1211

1588

def __getattribute__(self, name):

1212

if(name == '_pipe'):

1589

if name == '_pipe':

1213

1590

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

1214

1591

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

1215

1592

data = self._pipe.recv()

1222

1599

return func

1223

1600

1224

1601

def __setattr__(self, name, value):

1225

if(name == '_pipe'):

1602

if name == '_pipe':

1226

1603

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

1227

1604

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

1228

1605

1606

1229

1607

class ClientDBusTransitional(ClientDBus):

1230

__metaclass__ = transitional_dbus_metaclass

1608

__metaclass__ = AlternateDBusNamesMetaclass

1609

1231

1610

1232

1611

class ClientHandler(socketserver.BaseRequestHandler, object):

1233

1612

"""A class to handle client connections.

1313

1692

client.name)

1314

1693

if self.server.use_dbus:

1315

1694

# Emit D-Bus signal

1316

client.Rejected("Disabled")

1695

client.Rejected("Disabled")

1317

1696

return

1318

1697

1319

if client._approved or not client.approval_delay:

1698

if client.approved or not client.approval_delay:

1320

1699

#We are approved or approval is disabled

1321

1700

break

1322

elif client._approved is None:

1701

elif client.approved is None:

1323

1702

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

1324

1703

client.name)

1325

1704

if self.server.use_dbus:

1336

1715

return

1337

1716

1338

1717

#wait until timeout or approved

1339

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

1340

1718

time = datetime.datetime.now()

1341

1719

client.changedstate.acquire()

1342

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

1720

(client.changedstate.wait

1721

(float(client.timedelta_to_milliseconds(delay)

1722

/ 1000)))

1343

1723

client.changedstate.release()

1344

1724

time2 = datetime.datetime.now()

1345

1725

if (time2 - time) >= delay:

1369

1749

sent_size += sent

1370

1750

1371

1751

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

1372

# bump the timeout as if seen

1373

client.checked_ok(client.extended_timeout)

1752

# bump the timeout using extended_timeout

1753

client.bump_timeout(client.extended_timeout)

1374

1754

if self.server.use_dbus:

1375

1755

# Emit D-Bus signal

1376

1756

client.GotSecret()

1443

1823

# Convert the buffer to a Python bytestring

1444

1824

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

1445

1825

# Convert the bytestring to hexadecimal notation

1446

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

1826

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

1447

1827

return hex_fpr

1448

1828

1449

1829

1452

1832

def sub_process_main(self, request, address):

1453

1833

try:

1454

1834

self.finish_request(request, address)

1455

except:

1835

except Exception:

1456

1836

self.handle_error(request, address)

1457

1837

self.close_request(request)

1458

1838

1459

1839

def process_request(self, request, address):

1460

1840

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

1461

multiprocessing.Process(target = self.sub_process_main,

1462

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

1841

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

1842

args = (request,

1843

address))

1844

proc.start()

1845

return proc

1463

1846

1464

1847

1465

1848

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1471

1854

"""

1472

1855

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1473

1856

1474

super(MultiprocessingMixInWithPipe,

1475

self).process_request(request, client_address)

1857

proc = MultiprocessingMixIn.process_request(self, request,

1858

client_address)

1476

1859

self.child_pipe.close()

1477

self.add_pipe(parent_pipe)

1860

self.add_pipe(parent_pipe, proc)

1478

1861

1479

def add_pipe(self, parent_pipe):

1862

def add_pipe(self, parent_pipe, proc):

1480

1863

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

1481

1864

raise NotImplementedError

1482

1865

1560

1943

self.enabled = False

1561

1944

self.clients = clients

1562

1945

if self.clients is None:

1563

self.clients = set()

1946

self.clients = {}

1564

1947

self.use_dbus = use_dbus

1565

1948

self.gnutls_priority = gnutls_priority

1566

1949

IPv6_TCPServer.__init__(self, server_address,

1570

1953

def server_activate(self):

1571

1954

if self.enabled:

1572

1955

return socketserver.TCPServer.server_activate(self)

1956

1573

1957

def enable(self):

1574

1958

self.enabled = True

1575

def add_pipe(self, parent_pipe):

1959

1960

def add_pipe(self, parent_pipe, proc):

1576

1961

# Call "handle_ipc" for both data and EOF events

1577

1962

gobject.io_add_watch(parent_pipe.fileno(),

1578

1963

gobject.IO_IN | gobject.IO_HUP,

1579

1964

functools.partial(self.handle_ipc,

1580

parent_pipe = parent_pipe))

1581

1965

parent_pipe =

1966

parent_pipe,

1967

proc = proc))

1968

1582

1969

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

1583

client_object=None):

1970

proc = None, client_object=None):

1584

1971

condition_names = {

1585

1972

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

1586

1973

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

1595

1982

for cond, name in

1596

1983

condition_names.iteritems()

1597

1984

if cond & condition)

1598

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

1985

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

1599

1986

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

1987

# Wait for other process to exit

1988

proc.join()

1600

1989

return False

1601

1990

1602

1991

# Read a request from the child

1607

1996

fpr = request[1]

1608

1997

address = request[2]

1609

1998

1610

for c in self.clients:

1999

for c in self.clients.itervalues():

1611

2000

if c.fingerprint == fpr:

1612

2001

client = c

1613

2002

break

1616

2005

"dress: %s", fpr, address)

1617

2006

if self.use_dbus:

1618

2007

# Emit D-Bus signal

1619

mandos_dbus_service.ClientNotFound(fpr, address[0])

2008

mandos_dbus_service.ClientNotFound(fpr,

2009

address[0])

1620

2010

parent_pipe.send(False)

1621

2011

return False

1622

2012

1623

2013

gobject.io_add_watch(parent_pipe.fileno(),

1624

2014

gobject.IO_IN | gobject.IO_HUP,

1625

2015

functools.partial(self.handle_ipc,

1626

parent_pipe = parent_pipe,

1627

client_object = client))

2016

parent_pipe =

2017

parent_pipe,

2018

proc = proc,

2019

client_object =

2020

client))

1628

2021

parent_pipe.send(True)

1629

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

2022

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

2023

# same fileno

1630

2024

return False

1631

2025

if command == 'funcall':

1632

2026

funcname = request[1]

1633

2027

args = request[2]

1634

2028

kwargs = request[3]

1635

2029

1636

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

2030

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

2031

funcname)(*args,

2032

**kwargs)))

1637

2033

1638

2034

if command == 'getattr':

1639

2035

attrname = request[1]

1640

2036

if callable(client_object.__getattribute__(attrname)):

1641

2037

parent_pipe.send(('function',))

1642

2038

else:

1643

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

2039

parent_pipe.send(('data', client_object

2040

.__getattribute__(attrname)))

1644

2041

1645

2042

if command == 'setattr':

1646

2043

attrname = request[1]

1682

2079

elif suffix == "w":

1683

2080

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

1684

2081

else:

1685

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

2082

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

2083

.format(suffix))

1686

2084

except (ValueError, IndexError) as e:

1687

2085

raise ValueError(*(e.args))

1688

2086

timevalue += delta

1689

2087

return timevalue

1690

2088

1691

2089

1692

def if_nametoindex(interface):

1693

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

1694

1695

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

1696

global if_nametoindex

1697

try:

1698

if_nametoindex = (ctypes.cdll.LoadLibrary

1699

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

1700

.if_nametoindex)

1701

except (OSError, AttributeError):

1702

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

1703

def if_nametoindex(interface):

1704

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

1705

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

1706

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

1707

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1708

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

1709

interface))

1710

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

1711

ifreq[16:20])[0]

1712

return interface_index

1713

return if_nametoindex(interface)

1714

1715

1716

2090

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

1717

2091

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

1718

2092

1726

2100

sys.exit()

1727

2101

if not noclose:

1728

2102

# Close all standard open file descriptors

1729

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

2103

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

1730

2104

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

1731

2105

raise OSError(errno.ENODEV,

1732

"%s not a character device"

1733

% os.path.devnull)

2106

"{0} not a character device"

2107

.format(os.devnull))

1734

2108

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

1735

2109

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

1736

2110

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

1745

2119

1746

2120

parser = argparse.ArgumentParser()

1747

2121

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

1748

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

2122

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

1749

2123

help="show version number and exit")

1750

2124

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

1751

2125

help="Bind to interface IF")

1773

2147

" system bus interface")

1774

2148

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

1775

2149

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

2150

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

2151

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

2152

" state")

2153

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

2154

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

2155

1776

2156

options = parser.parse_args()

1777

2157

1778

2158

if options.check:

1791

2171

"use_dbus": "True",

1792

2172

"use_ipv6": "True",

1793

2173

"debuglevel": "",

2174

"restore": "True",

2175

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

1794

2176

}

1795

2177

1796

2178

# Parse config file for server-global settings

1813

2195

# options, if set.

1814

2196

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

1815

2197

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

1816

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

2198

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

2199

"statedir"):

1817

2200

value = getattr(options, option)

1818

2201

if value is not None:

1819

2202

server_settings[option] = value

1831

2214

debuglevel = server_settings["debuglevel"]

1832

2215

use_dbus = server_settings["use_dbus"]

1833

2216

use_ipv6 = server_settings["use_ipv6"]

2217

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

2218

stored_state_file)

2219

2220

if debug:

2221

initlogger(debug, logging.DEBUG)

2222

else:

2223

if not debuglevel:

2224

initlogger(debug)

2225

else:

2226

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

2227

initlogger(debug, level)

1834

2228

1835

2229

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

1836

2230

syslogger.setFormatter(logging.Formatter

1837

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

1838

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

1839

% server_settings["servicename"]))

2231

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

2232

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

2233

.format(server_settings

2234

["servicename"])))

1840

2235

1841

2236

# Parse config file with clients

1842

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

1843

"extended_timeout": "15m",

1844

"interval": "2m",

1845

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

1846

"host": "",

1847

"approval_delay": "0s",

1848

"approval_duration": "1s",

1849

}

1850

client_config = configparser.SafeConfigParser(client_defaults)

2237

client_config = configparser.SafeConfigParser(Client

2238

.client_defaults)

1851

2239

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

1852

2240

"clients.conf"))

1853

2241

1870

2258

except IOError:

1871

2259

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

1872

2260

1873

try:

1874

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

1875

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

1876

except KeyError:

2261

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

1877

2262

try:

1878

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

1879

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

2263

uid = pwd.getpwnam(name).pw_uid

2264

gid = pwd.getpwnam(name).pw_gid

2265

break

1880

2266

except KeyError:

1881

try:

1882

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

1883

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

1884

except KeyError:

1885

uid = 65534

1886

gid = 65534

2267

continue

2268

else:

2269

uid = 65534

2270

gid = 65534

1887

2271

try:

1888

2272

os.setgid(gid)

1889

2273

os.setuid(uid)

1891

2275

if error[0] != errno.EPERM:

1892

2276

raise error

1893

2277

1894

if not debug and not debuglevel:

1895

syslogger.setLevel(logging.WARNING)

1896

console.setLevel(logging.WARNING)

1897

if debuglevel:

1898

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

1899

syslogger.setLevel(level)

1900

console.setLevel(level)

1901

1902

2278

if debug:

1903

2279

# Enable all possible GnuTLS debugging

1904

2280

1914

2290

.gnutls_global_set_log_function(debug_gnutls))

1915

2291

1916

2292

# Redirect stdin so all checkers get /dev/null

1917

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

2293

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

1918

2294

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

1919

2295

if null > 2:

1920

2296

os.close(null)

1921

else:

1922

# No console logging

1923

logger.removeHandler(console)

1924

2297

1925

2298

# Need to fork before connecting to D-Bus

1926

2299

if not debug:

1927

2300

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

1928

2301

daemon()

1929

2302

2303

gobject.threads_init()

2304

1930

2305

global main_loop

1931

2306

# From the Avahi example code

1932

DBusGMainLoop(set_as_default=True )

2307

DBusGMainLoop(set_as_default=True)

1933

2308

main_loop = gobject.MainLoop()

1934

2309

bus = dbus.SystemBus()

1935

2310

# End of Avahi example code

1936

2311

if use_dbus:

1937

2312

try:

1938

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

1939

bus, do_not_queue=True)

1940

bus_name2 = dbus.service.BusName("se.recompile.Mandos",

1941

bus, do_not_queue=True)

2313

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

2314

bus, do_not_queue=True)

2315

old_bus_name = (dbus.service.BusName

2316

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

2317

do_not_queue=True))

1942

2318

except dbus.exceptions.NameExistsException as e:

1943

2319

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

1944

2320

use_dbus = False

1945

2321

server_settings["use_dbus"] = False

1946

2322

tcp_server.use_dbus = False

1947

2323

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1948

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

1949

servicetype = "_mandos._tcp",

1950

protocol = protocol, bus = bus)

2324

service = AvahiServiceToSyslog(name =

2325

server_settings["servicename"],

2326

servicetype = "_mandos._tcp",

2327

protocol = protocol, bus = bus)

1951

2328

if server_settings["interface"]:

1952

2329

service.interface = (if_nametoindex

1953

2330

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

1957

2334

1958

2335

client_class = Client

1959

2336

if use_dbus:

1960

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

1961

def client_config_items(config, section):

1962

special_settings = {

1963

"approved_by_default":

1964

lambda: config.getboolean(section,

1965

"approved_by_default"),

1966

}

1967

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

2337

client_class = functools.partial(ClientDBusTransitional,

2338

bus = bus)

2339

2340

client_settings = Client.config_parser(client_config)

2341

old_client_settings = {}

2342

clients_data = {}

2343

2344

# Get client data and settings from last running state.

2345

if server_settings["restore"]:

2346

try:

2347

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

2348

clients_data, old_client_settings = (pickle.load

2349

(stored_state))

2350

os.remove(stored_state_path)

2351

except IOError as e:

2352

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

2353

.format(e))

2354

if e.errno != errno.ENOENT:

2355

raise

2356

except EOFError as e:

2357

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

2358

"EOFError: {0}".format(e))

2359

2360

with PGPEngine() as pgp:

2361

for client_name, client in clients_data.iteritems():

2362

# Decide which value to use after restoring saved state.

2363

# We have three different values: Old config file,

2364

# new config file, and saved state.

2365

# New config value takes precedence if it differs from old

2366

# config value, otherwise use saved state.

2367

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

2368

try:

2369

# For each value in new config, check if it

2370

# differs from the old config value (Except for

2371

# the "secret" attribute)

2372

if (name != "secret" and

2373

value != old_client_settings[client_name]

2374

[name]):

2375

client[name] = value

2376

except KeyError:

2377

pass

2378

2379

# Clients who has passed its expire date can still be

2380

# enabled if its last checker was successful. Clients

2381

# whose checker succeeded before we stored its state is

2382

# assumed to have successfully run all checkers during

2383

# downtime.

2384

if client["enabled"]:

2385

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

2386

if not client["last_checked_ok"]:

2387

logger.warning(

2388

"disabling client {0} - Client never "

2389

"performed a successful checker"

2390

.format(client_name))

2391

client["enabled"] = False

2392

elif client["last_checker_status"] != 0:

2393

logger.warning(

2394

"disabling client {0} - Client "

2395

"last checker failed with error code {1}"

2396

.format(client_name,

2397

client["last_checker_status"]))

2398

client["enabled"] = False

2399

else:

2400

client["expires"] = (datetime.datetime

2401

.utcnow()

2402

+ client["timeout"])

2403

logger.debug("Last checker succeeded,"

2404

" keeping {0} enabled"

2405

.format(client_name))

1968

2406

try:

1969

yield (name, special_settings[name]())

1970

except KeyError:

1971

yield (name, value)

1972

1973

tcp_server.clients.update(set(

1974

client_class(name = section,

1975

config= dict(client_config_items(

1976

client_config, section)))

1977

for section in client_config.sections()))

2407

client["secret"] = (

2408

pgp.decrypt(client["encrypted_secret"],

2409

client_settings[client_name]

2410

["secret"]))

2411

except PGPError:

2412

# If decryption fails, we use secret from new settings

2413

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

2414

.format(client_name))

2415

client["secret"] = (

2416

client_settings[client_name]["secret"])

2417

2418

2419

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

2420

for client_name in (set(old_client_settings)

2421

- set(client_settings)):

2422

del clients_data[client_name]

2423

for client_name in (set(client_settings)

2424

- set(old_client_settings)):

2425

clients_data[client_name] = client_settings[client_name]

2426

2427

# Create all client objects

2428

for client_name, client in clients_data.iteritems():

2429

tcp_server.clients[client_name] = client_class(

2430

name = client_name, settings = client)

2431

1978

2432

if not tcp_server.clients:

1979

2433

logger.warning("No clients defined")

1980

2434

1991

2445

# "pidfile" was never created

1992

2446

pass

1993

2447

del pidfilename

1994

1995

2448

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

1996

2449

1997

2450

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

1998

2451

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

1999

2452

2000

2453

if use_dbus:

2001

class MandosDBusService(dbus.service.Object):

2454

class MandosDBusService(DBusObjectWithProperties):

2002

2455

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

2003

2456

def __init__(self):

2004

2457

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

2005

_interface = "se.bsnet.fukt.Mandos"

2458

_interface = "se.recompile.Mandos"

2459

2460

@dbus_interface_annotations(_interface)

2461

def _foo(self):

2462

return { "org.freedesktop.DBus.Property"

2463

".EmitsChangedSignal":

2464

"false"}

2006

2465

2007

2466

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

2008

2467

def ClientAdded(self, objpath):

2023

2482

def GetAllClients(self):

2024

2483

"D-Bus method"

2025

2484

return dbus.Array(c.dbus_object_path

2026

for c in tcp_server.clients)

2485

for c in

2486

tcp_server.clients.itervalues())

2027

2487

2028

2488

@dbus.service.method(_interface,

2029

2489

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

2031

2491

"D-Bus method"

2032

2492

return dbus.Dictionary(

2033

2493

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

2034

for c in tcp_server.clients),

2494

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

2035

2495

signature="oa{sv}")

2036

2496

2037

2497

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

2038

2498

def RemoveClient(self, object_path):

2039

2499

"D-Bus method"

2040

for c in tcp_server.clients:

2500

for c in tcp_server.clients.itervalues():

2041

2501

if c.dbus_object_path == object_path:

2042

tcp_server.clients.remove(c)

2502

del tcp_server.clients[c.name]

2043

2503

c.remove_from_connection()

2044

2504

# Don't signal anything except ClientRemoved

2045

2505

c.disable(quiet=True)

2051

2511

del _interface

2052

2512

2053

2513

class MandosDBusServiceTransitional(MandosDBusService):

2054

__metaclass__ = transitional_dbus_metaclass

2514

__metaclass__ = AlternateDBusNamesMetaclass

2055

2515

mandos_dbus_service = MandosDBusServiceTransitional()

2056

2516

2057

2517

def cleanup():

2058

2518

"Cleanup function; run on exit"

2059

2519

service.cleanup()

2060

2520

2521

multiprocessing.active_children()

2522

if not (tcp_server.clients or client_settings):

2523

return

2524

2525

# Store client before exiting. Secrets are encrypted with key

2526

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

2527

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

2528

clients = {}

2529

with PGPEngine() as pgp:

2530

for client in tcp_server.clients.itervalues():

2531

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

2532

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

2533

key)

2534

client_dict = {}

2535

2536

# A list of attributes that can not be pickled

2537

# + secret.

2538

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

2539

"checker"))

2540

for name, typ in (inspect.getmembers

2541

(dbus.service.Object)):

2542

exclude.add(name)

2543

2544

client_dict["encrypted_secret"] = (client

2545

.encrypted_secret)

2546

for attr in client.client_structure:

2547

if attr not in exclude:

2548

client_dict[attr] = getattr(client, attr)

2549

2550

clients[client.name] = client_dict

2551

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

2552

2553

try:

2554

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

2555

prefix="clients-",

2556

dir=os.path.dirname

2557

(stored_state_path))

2558

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

2559

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

2560

os.rename(tempname, stored_state_path)

2561

except (IOError, OSError) as e:

2562

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

2563

.format(e))

2564

if not debug:

2565

try:

2566

os.remove(tempname)

2567

except NameError:

2568

pass

2569

if e.errno not in set((errno.ENOENT, errno.EACCES,

2570

errno.EEXIST)):

2571

raise e

2572

2573

# Delete all clients, and settings from config

2061

2574

while tcp_server.clients:

2062

client = tcp_server.clients.pop()

2575

name, client = tcp_server.clients.popitem()

2063

2576

if use_dbus:

2064

2577

client.remove_from_connection()

2065

client.disable_hook = None

2066

2578

# Don't signal anything except ClientRemoved

2067

2579

client.disable(quiet=True)

2068

2580

if use_dbus:

2069

2581

# Emit D-Bus signal

2070

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2582

mandos_dbus_service.ClientRemoved(client

2583

.dbus_object_path,

2071

2584

client.name)

2585

client_settings.clear()

2072

2586

2073

2587

atexit.register(cleanup)

2074

2588

2075

for client in tcp_server.clients:

2589

for client in tcp_server.clients.itervalues():

2076

2590

if use_dbus:

2077

2591

# Emit D-Bus signal

2078

2592

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2079

client.enable()

2593

# Need to initiate checking of clients

2594

if client.enabled:

2595

client.init_checker()

2080

2596

2081

2597

tcp_server.enable()

2082

2598

tcp_server.server_activate()

2085

2601

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

2086

2602

if use_ipv6:

2087

2603

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

2088

" flowinfo %d, scope_id %d"

2089

% tcp_server.socket.getsockname())

2604

" flowinfo %d, scope_id %d",

2605

*tcp_server.socket.getsockname())

2090

2606

else: # IPv4

2091

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

2092

% tcp_server.socket.getsockname())

2607

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

2608

*tcp_server.socket.getsockname())

2093

2609

2094

2610

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

2095

2611

2098

2614

try:

2099

2615

service.activate()

2100

2616

except dbus.exceptions.DBusException as error:

2101

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

2617

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

2102

2618

cleanup()

2103

2619

sys.exit(1)

2104

2620

# End of Avahi example code

2111

2627

logger.debug("Starting main loop")

2112

2628

main_loop.run()

2113

2629

except AvahiError as error:

2114

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

2630

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

2115

2631

cleanup()

2116

2632

sys.exit(1)

2117

2633

except KeyboardInterrupt:

2122

2638

# Must run before the D-Bus bus name gets deregistered

2123

2639

cleanup()

2124

2640

2125

2126

2641

if __name__ == '__main__':

2127

2642

main()