/mandos/trunk : revision 502

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

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#

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# Everything else is

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#

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

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

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# along with this program. If not, see

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

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#

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

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

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#

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from __future__ import (division, absolute_import, print_function,

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import functools

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import dbus

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import dbus.service

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import ctypes.util

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import xml.dom.minidom

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import inspect

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import GnuPGInterface

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.5.3"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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version = "1.3.1"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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

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"""init logger and add loglevel"""

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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

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pass

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class PGPEngine(object):

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

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def __init__(self):

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self.gnupg = GnuPGInterface.GnuPG()

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

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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

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'--quiet',

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'--no-use-agent'])

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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def encrypt(self, data, password):

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

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

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return ciphertext

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def decrypt(self, data, password):

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

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

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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decrypted_plaintext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return decrypted_plaintext

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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class AvahiError(Exception):

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

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" 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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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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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException):

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dbus.exceptions.DBusException) as e:

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pass

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self.group = None

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self.remove()

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

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

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% 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_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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extended_timeout: extra long timeout when password 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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@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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475

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")

479

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

480

"enabled")

481

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

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.replace(" ", ""))

484

if "secret" in section:

485

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

486

elif "secfile" in section:

487

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

488

(section["secfile"])),

489

"rb") as secfile:

490

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

491

else:

492

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

493

% section)

494

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

495

client["extended_timeout"] = string_to_delta(

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section["extended_timeout"])

497

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

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client["approval_delay"] = string_to_delta(

499

section["approval_delay"])

500

client["approval_duration"] = string_to_delta(

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section["approval_duration"])

502

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

503

client["last_approval_request"] = None

504

client["last_checked_ok"] = None

505

client["last_checker_status"] = -2

506

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return settings

508

509

510

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

330

return _timedelta_to_milliseconds(self.approval_delay)

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332

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

511

333

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

512

334

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

513

335

attribute."""

514

336

self.name = name

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

337

if config is None:

338

config = {}

529

339

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

530

340

# Uppercase and remove spaces from fingerprint for later

531

341

# comparison purposes with return value from the fingerprint()

532

342

# function

343

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

344

.replace(" ", ""))

533

345

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

534

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

535

datetime.datetime.utcnow())

536

537

# attributes specific for this server instance

346

if "secret" in config:

347

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

348

elif "secfile" in config:

349

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

350

(config["secfile"])),

351

"rb") as secfile:

352

self.secret = secfile.read()

353

else:

354

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

355

% self.name)

356

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

357

self.created = datetime.datetime.utcnow()

358

self.enabled = False

359

self.last_approval_request = None

360

self.last_enabled = None

361

self.last_checked_ok = None

362

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

363

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

364

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

365

self.disable_hook = disable_hook

538

366

self.checker = None

539

367

self.checker_initiator_tag = None

540

368

self.disable_initiator_tag = None

369

self.expires = None

541

370

self.checker_callback_tag = None

371

self.checker_command = config["checker"]

542

372

self.current_checker_command = None

543

self.approved = None

373

self.last_connect = None

374

self._approved = None

375

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

376

True)

544

377

self.approvals_pending = 0

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)

378

self.approval_delay = string_to_delta(

379

config["approval_delay"])

380

self.approval_duration = string_to_delta(

381

config["approval_duration"])

382

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

559

383

560

# Send notice to process children that client state has changed

561

384

def send_changedstate(self):

562

with self.changedstate:

563

self.changedstate.notify_all()

564

385

self.changedstate.acquire()

386

self.changedstate.notify_all()

387

self.changedstate.release()

388

565

389

def enable(self):

566

390

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

567

391

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

568

392

# Already enabled

569

393

return

570

394

self.send_changedstate()

395

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

396

# and every interval from then on.

397

self.checker_initiator_tag = (gobject.timeout_add

398

(self.interval_milliseconds(),

399

self.start_checker))

400

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

571

401

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

402

self.disable_initiator_tag = (gobject.timeout_add

403

(self.timeout_milliseconds(),

404

self.disable))

572

405

self.enabled = True

573

406

self.last_enabled = datetime.datetime.utcnow()

574

self.init_checker()

407

# Also start a new checker *right now*.

408

self.start_checker()

575

409

576

410

def disable(self, quiet=True):

577

411

"""Disable this client."""

589

423

gobject.source_remove(self.checker_initiator_tag)

590

424

self.checker_initiator_tag = None

591

425

self.stop_checker()

426

if self.disable_hook:

427

self.disable_hook(self)

592

428

self.enabled = False

593

429

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

594

430

return False

595

431

596

432

def __del__(self):

433

self.disable_hook = None

597

434

self.disable()

598

435

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

612

436

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

613

437

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

614

438

self.checker_callback_tag = None

615

439

self.checker = None

616

440

if os.WIFEXITED(condition):

617

self.last_checker_status = os.WEXITSTATUS(condition)

618

if self.last_checker_status == 0:

441

exitstatus = os.WEXITSTATUS(condition)

442

if exitstatus == 0:

619

443

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

620

444

vars(self))

621

445

self.checked_ok()

623

447

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

624

448

vars(self))

625

449

else:

626

self.last_checker_status = -1

627

450

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

628

451

vars(self))

629

452

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."""

453

def checked_ok(self, timeout=None):

454

"""Bump up the timeout for this client.

455

456

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

457

alive and well.

458

"""

638

459

if timeout is None:

639

460

timeout = self.timeout

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

461

self.last_checked_ok = datetime.datetime.utcnow()

462

gobject.source_remove(self.disable_initiator_tag)

463

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

464

self.disable_initiator_tag = (gobject.timeout_add

465

(_timedelta_to_milliseconds(timeout),

466

self.disable))

647

467

648

468

def need_approval(self):

649

469

self.last_approval_request = datetime.datetime.utcnow()

689

509

'replace')))

690

510

for attr in

691

511

self.runtime_expansions)

692

512

693

513

try:

694

514

command = self.checker_command % escaped_attrs

695

515

except TypeError as error:

741

561

raise

742

562

self.checker = None

743

563

744

745

564

def dbus_service_property(dbus_interface, signature="v",

746

565

access="readwrite", byte_arrays=False):

747

566

"""Decorators for marking methods of a DBusObjectWithProperties to

772

591

return decorator

773

592

774

593

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

812

594

class DBusPropertyException(dbus.exceptions.DBusException):

813

595

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

814

596

"""

830

612

831

613

class DBusObjectWithProperties(dbus.service.Object):

832

614

"""A D-Bus object with properties.

833

615

834

616

Classes inheriting from this can use the dbus_service_property

835

617

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

836

618

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

837

619

"""

838

620

839

621

@staticmethod

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)

622

def _is_dbus_property(obj):

623

return getattr(obj, "_dbus_is_property", False)

848

624

849

def _get_all_dbus_things(self, thing):

625

def _get_all_dbus_properties(self):

850

626

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

851

627

"""

852

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

853

name),

854

athing.__get__(self))

855

for cls in self.__class__.__mro__

856

for name, athing in

857

inspect.getmembers(cls,

858

self._is_dbus_thing(thing)))

628

return ((prop._dbus_name, prop)

629

for name, prop in

630

inspect.getmembers(self, self._is_dbus_property))

859

631

860

632

def _get_dbus_property(self, interface_name, property_name):

861

633

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

862

634

property with the specified name and interface.

863

635

"""

864

for cls in self.__class__.__mro__:

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):

870

return value.__get__(self)

871

636

for name in (property_name,

637

property_name + "_dbus_property"):

638

prop = getattr(self, name, None)

639

if (prop is None

640

or not self._is_dbus_property(prop)

641

or prop._dbus_name != property_name

642

or (interface_name and prop._dbus_interface

643

and interface_name != prop._dbus_interface)):

644

continue

645

return prop

872

646

# No such property

873

647

raise DBusPropertyNotFound(self.dbus_object_path + ":"

874

648

+ interface_name + "."

899

673

# signatures other than "ay".

900

674

if prop._dbus_signature != "ay":

901

675

raise ValueError

902

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

903

for byte in value))

676

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

677

for byte in value))

904

678

prop(value)

905

679

906

680

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

908

682

def GetAll(self, interface_name):

909

683

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

910

684

standard.

911

685

912

686

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

913

687

"""

914

properties = {}

915

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

688

all = {}

689

for name, prop in self._get_all_dbus_properties():

916

690

if (interface_name

917

691

and interface_name != prop._dbus_interface):

918

692

# Interface non-empty but did not match

922

696

continue

923

697

value = prop()

924

698

if not hasattr(value, "variant_level"):

925

properties[name] = value

699

all[name] = value

926

700

continue

927

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

928

value.variant_level+1)

929

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

701

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

702

value.variant_level+1)

703

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

930

704

931

705

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

932

706

out_signature="s",

933

707

path_keyword='object_path',

934

708

connection_keyword='connection')

935

709

def Introspect(self, object_path, connection):

936

"""Overloading of standard D-Bus method.

937

938

Inserts property tags and interface annotation tags.

710

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

939

711

"""

940

712

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

941

713

connection)

948

720

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

949

721

return e

950

722

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

951

# Add property tags

952

723

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

953

724

for name, prop

954

in self._get_all_dbus_things("property")

725

in self._get_all_dbus_properties()

955

726

if prop._dbus_interface

956

727

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

957

728

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)

989

729

# Add the names to the return values for the

990

730

# "org.freedesktop.DBus.Properties" methods

991

731

if (if_tag.getAttribute("name")

1017

757

return dbus.String(dt.isoformat(),

1018

758

variant_level=variant_level)

1019

759

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

"""

1026

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

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

1163

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

1164

1165

1166

760

class ClientDBus(Client, DBusObjectWithProperties):

1167

761

"""A Client class using D-Bus

1168

762

1177

771

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

1178

772

1179

773

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

774

self._approvals_pending = 0

1180

775

self.bus = bus

1181

776

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

1182

777

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

1192

787

def notifychangeproperty(transform_func,

1193

788

dbus_name, type_func=lambda x: x,

1194

789

variant_level=1):

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

790

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

791

changes to DBus.

792

transform_fun: Function that takes a value and transform it to

793

DBus type.

794

dbus_name: DBus name of the variable

1201

795

type_func: Function that transform the value before sending it

1202

to the D-Bus. Default: no transform

1203

variant_level: D-Bus variant level. Default: 1

796

to DBus

797

variant_level: DBus variant level. default: 1

1204

798

"""

1205

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

799

real_value = [None,]

1206

800

def setter(self, value):

801

old_value = real_value[0]

802

real_value[0] = value

1207

803

if hasattr(self, "dbus_object_path"):

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)

804

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

805

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

806

variant_level)

1214

807

self.PropertyChanged(dbus.String(dbus_name),

1215

808

dbus_value)

1216

setattr(self, attrname, value)

1217

1218

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

1219

1220

809

810

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

811

812

1221

813

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1222

814

approvals_pending = notifychangeproperty(dbus.Boolean,

1223

815

"ApprovalPending",

1226

818

last_enabled = notifychangeproperty(datetime_to_dbus,

1227

819

"LastEnabled")

1228

820

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

1229

type_func = lambda checker:

1230

checker is not None)

821

type_func = lambda checker: checker is not None)

1231

822

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1232

823

"LastCheckedOK")

1233

last_checker_status = notifychangeproperty(dbus.Int16,

1234

"LastCheckerStatus")

1235

last_approval_request = notifychangeproperty(

1236

datetime_to_dbus, "LastApprovalRequest")

824

last_approval_request = notifychangeproperty(datetime_to_dbus,

825

"LastApprovalRequest")

1237

826

approved_by_default = notifychangeproperty(dbus.Boolean,

1238

827

"ApprovedByDefault")

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)

828

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

829

type_func = _timedelta_to_milliseconds)

830

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

831

type_func = _timedelta_to_milliseconds)

1246

832

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

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)

833

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

834

type_func = _timedelta_to_milliseconds)

835

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

836

type_func = _timedelta_to_milliseconds)

837

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

838

type_func = _timedelta_to_milliseconds)

1257

839

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

1258

840

1259

841

del notifychangeproperty

1285

867

1286

868

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

1287

869

*args, **kwargs)

1288

870

1289

871

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

1290

872

old_checker = self.checker

1291

873

if self.checker is not None:

1301

883

return r

1302

884

1303

885

def _reset_approved(self):

1304

self.approved = None

886

self._approved = None

1305

887

return False

1306

888

1307

889

def approve(self, value=True):

1308

890

self.send_changedstate()

1309

self.approved = value

1310

gobject.timeout_add(timedelta_to_milliseconds

891

self._approved = value

892

gobject.timeout_add(_timedelta_to_milliseconds

1311

893

(self.approval_duration),

1312

894

self._reset_approved)

1313

895

1314

896

1315

897

## D-Bus methods, signals & properties

1316

_interface = "se.recompile.Mandos.Client"

1317

1318

## Interfaces

1319

1320

@dbus_interface_annotations(_interface)

1321

def _foo(self):

1322

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

1323

"false"}

898

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

1324

899

1325

900

## Signals

1326

901

1426

1001

access="readwrite")

1427

1002

def ApprovalDuration_dbus_property(self, value=None):

1428

1003

if value is None: # get

1429

return dbus.UInt64(timedelta_to_milliseconds(

1004

return dbus.UInt64(_timedelta_to_milliseconds(

1430

1005

self.approval_duration))

1431

1006

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

1432

1007

1446

1021

def Host_dbus_property(self, value=None):

1447

1022

if value is None: # get

1448

1023

return dbus.String(self.host)

1449

self.host = unicode(value)

1024

self.host = value

1450

1025

1451

1026

# Created - property

1452

1027

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

1453

1028

def Created_dbus_property(self):

1454

return datetime_to_dbus(self.created)

1029

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

1455

1030

1456

1031

# LastEnabled - property

1457

1032

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

1478

1053

return

1479

1054

return datetime_to_dbus(self.last_checked_ok)

1480

1055

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

1056

# Expires - property

1488

1057

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

1489

1058

def Expires_dbus_property(self):

1501

1070

if value is None: # get

1502

1071

return dbus.UInt64(self.timeout_milliseconds())

1503

1072

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

1073

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

1074

return

1504

1075

# 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

1076

gobject.source_remove(self.disable_initiator_tag)

1077

self.disable_initiator_tag = None

1078

self.expires = None

1079

time_to_die = (self.

1080

_timedelta_to_milliseconds((self

1081

.last_checked_ok

1082

+ self.timeout)

1083

- datetime.datetime

1084

.utcnow()))

1085

if time_to_die <= 0:

1086

# The timeout has passed

1087

self.disable()

1088

else:

1089

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

1090

+ datetime.timedelta(milliseconds = time_to_die))

1091

self.disable_initiator_tag = (gobject.timeout_add

1092

(time_to_die, self.disable))

1093

1524

1094

# ExtendedTimeout - property

1525

1095

@dbus_service_property(_interface, signature="t",

1526

1096

access="readwrite")

1528

1098

if value is None: # get

1529

1099

return dbus.UInt64(self.extended_timeout_milliseconds())

1530

1100

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

1531

1101

1532

1102

# Interval - property

1533

1103

@dbus_service_property(_interface, signature="t",

1534

1104

access="readwrite")

1538

1108

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

1539

1109

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

1540

1110

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

1111

# Reschedule checker run

1112

gobject.source_remove(self.checker_initiator_tag)

1113

self.checker_initiator_tag = (gobject.timeout_add

1114

(value, self.start_checker))

1115

self.start_checker() # Start one now, too

1116

1548

1117

# Checker - property

1549

1118

@dbus_service_property(_interface, signature="s",

1550

1119

access="readwrite")

1551

1120

def Checker_dbus_property(self, value=None):

1552

1121

if value is None: # get

1553

1122

return dbus.String(self.checker_command)

1554

self.checker_command = unicode(value)

1123

self.checker_command = value

1555

1124

1556

1125

# CheckerRunning - property

1557

1126

@dbus_service_property(_interface, signature="b",

1584

1153

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

1585

1154

if not self._pipe.recv():

1586

1155

raise KeyError()

1587

1156

1588

1157

def __getattribute__(self, name):

1589

if name == '_pipe':

1158

if(name == '_pipe'):

1590

1159

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

1591

1160

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

1592

1161

data = self._pipe.recv()

1597

1166

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

1598

1167

return self._pipe.recv()[1]

1599

1168

return func

1600

1169

1601

1170

def __setattr__(self, name, value):

1602

if name == '_pipe':

1171

if(name == '_pipe'):

1603

1172

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

1604

1173

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

1605

1174

1606

1175

1607

class ClientDBusTransitional(ClientDBus):

1608

__metaclass__ = AlternateDBusNamesMetaclass

1609

1610

1611

1176

class ClientHandler(socketserver.BaseRequestHandler, object):

1612

1177

"""A class to handle client connections.

1613

1178

1620

1185

unicode(self.client_address))

1621

1186

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

1622

1187

self.server.child_pipe.fileno())

1623

1188

1624

1189

session = (gnutls.connection

1625

1190

.ClientSession(self.request,

1626

1191

gnutls.connection

1627

1192

.X509Credentials()))

1628

1193

1629

1194

# Note: gnutls.connection.X509Credentials is really a

1630

1195

# generic GnuTLS certificate credentials object so long as

1631

1196

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

1632

1197

# here despite using OpenPGP certificates.

1633

1198

1634

1199

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

1635

1200

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

1636

1201

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

1642

1207

(gnutls.library.functions

1643

1208

.gnutls_priority_set_direct(session._c_object,

1644

1209

priority, None))

1645

1210

1646

1211

# Start communication using the Mandos protocol

1647

1212

# Get protocol number

1648

1213

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

1653

1218

except (ValueError, IndexError, RuntimeError) as error:

1654

1219

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

1655

1220

return

1656

1221

1657

1222

# Start GnuTLS connection

1658

1223

try:

1659

1224

session.handshake()

1663

1228

# established. Just abandon the request.

1664

1229

return

1665

1230

logger.debug("Handshake succeeded")

1666

1231

1667

1232

approval_required = False

1668

1233

try:

1669

1234

try:

1674

1239

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

1675

1240

return

1676

1241

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

1677

1242

1678

1243

try:

1679

1244

client = ProxyClient(child_pipe, fpr,

1680

1245

self.client_address)

1692

1257

client.name)

1693

1258

if self.server.use_dbus:

1694

1259

# Emit D-Bus signal

1695

client.Rejected("Disabled")

1260

client.Rejected("Disabled")

1696

1261

return

1697

1262

1698

if client.approved or not client.approval_delay:

1263

if client._approved or not client.approval_delay:

1699

1264

#We are approved or approval is disabled

1700

1265

break

1701

elif client.approved is None:

1266

elif client._approved is None:

1702

1267

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

1703

1268

client.name)

1704

1269

if self.server.use_dbus:

1715

1280

return

1716

1281

1717

1282

#wait until timeout or approved

1283

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

1718

1284

time = datetime.datetime.now()

1719

1285

client.changedstate.acquire()

1720

(client.changedstate.wait

1721

(float(client.timedelta_to_milliseconds(delay)

1722

/ 1000)))

1286

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

1723

1287

client.changedstate.release()

1724

1288

time2 = datetime.datetime.now()

1725

1289

if (time2 - time) >= delay:

1747

1311

sent, len(client.secret)

1748

1312

- (sent_size + sent))

1749

1313

sent_size += sent

1750

1314

1751

1315

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

1752

# bump the timeout using extended_timeout

1753

client.bump_timeout(client.extended_timeout)

1316

# bump the timeout as if seen

1317

client.checked_ok(client.extended_timeout)

1754

1318

if self.server.use_dbus:

1755

1319

# Emit D-Bus signal

1756

1320

client.GotSecret()

1823

1387

# Convert the buffer to a Python bytestring

1824

1388

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

1825

1389

# Convert the bytestring to hexadecimal notation

1826

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

1390

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

1827

1391

return hex_fpr

1828

1392

1829

1393

1832

1396

def sub_process_main(self, request, address):

1833

1397

try:

1834

1398

self.finish_request(request, address)

1835

except Exception:

1399

except:

1836

1400

self.handle_error(request, address)

1837

1401

self.close_request(request)

1838

1402

1839

1403

def process_request(self, request, address):

1840

1404

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

1841

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

1842

args = (request,

1843

address))

1844

proc.start()

1845

return proc

1846

1405

multiprocessing.Process(target = self.sub_process_main,

1406

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

1847

1407

1848

1408

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1849

1409

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

1853

1413

This function creates a new pipe in self.pipe

1854

1414

"""

1855

1415

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1856

1857

proc = MultiprocessingMixIn.process_request(self, request,

1858

client_address)

1416

1417

super(MultiprocessingMixInWithPipe,

1418

self).process_request(request, client_address)

1859

1419

self.child_pipe.close()

1860

self.add_pipe(parent_pipe, proc)

1861

1862

def add_pipe(self, parent_pipe, proc):

1420

self.add_pipe(parent_pipe)

1421

1422

def add_pipe(self, parent_pipe):

1863

1423

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

1864

1424

raise NotImplementedError

1865

1425

1866

1867

1426

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1868

1427

socketserver.TCPServer, object):

1869

1428

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

1943

1502

self.enabled = False

1944

1503

self.clients = clients

1945

1504

if self.clients is None:

1946

self.clients = {}

1505

self.clients = set()

1947

1506

self.use_dbus = use_dbus

1948

1507

self.gnutls_priority = gnutls_priority

1949

1508

IPv6_TCPServer.__init__(self, server_address,

1953

1512

def server_activate(self):

1954

1513

if self.enabled:

1955

1514

return socketserver.TCPServer.server_activate(self)

1956

1957

1515

def enable(self):

1958

1516

self.enabled = True

1959

1960

def add_pipe(self, parent_pipe, proc):

1517

def add_pipe(self, parent_pipe):

1961

1518

# Call "handle_ipc" for both data and EOF events

1962

1519

gobject.io_add_watch(parent_pipe.fileno(),

1963

1520

gobject.IO_IN | gobject.IO_HUP,

1964

1521

functools.partial(self.handle_ipc,

1965

parent_pipe =

1966

parent_pipe,

1967

proc = proc))

1968

1522

parent_pipe = parent_pipe))

1523

1969

1524

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

1970

proc = None, client_object=None):

1525

client_object=None):

1971

1526

condition_names = {

1972

1527

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

1973

1528

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

1982

1537

for cond, name in

1983

1538

condition_names.iteritems()

1984

1539

if cond & condition)

1985

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

1540

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

1986

1541

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

1987

# Wait for other process to exit

1988

proc.join()

1989

1542

return False

1990

1543

1991

1544

# Read a request from the child

1996

1549

fpr = request[1]

1997

1550

address = request[2]

1998

1551

1999

for c in self.clients.itervalues():

1552

for c in self.clients:

2000

1553

if c.fingerprint == fpr:

2001

1554

client = c

2002

1555

break

2005

1558

"dress: %s", fpr, address)

2006

1559

if self.use_dbus:

2007

1560

# Emit D-Bus signal

2008

mandos_dbus_service.ClientNotFound(fpr,

2009

address[0])

1561

mandos_dbus_service.ClientNotFound(fpr, address[0])

2010

1562

parent_pipe.send(False)

2011

1563

return False

2012

1564

2013

1565

gobject.io_add_watch(parent_pipe.fileno(),

2014

1566

gobject.IO_IN | gobject.IO_HUP,

2015

1567

functools.partial(self.handle_ipc,

2016

parent_pipe =

2017

parent_pipe,

2018

proc = proc,

2019

client_object =

2020

client))

1568

parent_pipe = parent_pipe,

1569

client_object = client))

2021

1570

parent_pipe.send(True)

2022

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

2023

# same fileno

1571

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

2024

1572

return False

2025

1573

if command == 'funcall':

2026

1574

funcname = request[1]

2027

1575

args = request[2]

2028

1576

kwargs = request[3]

2029

1577

2030

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

2031

funcname)(*args,

2032

**kwargs)))

2033

1578

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

1579

2034

1580

if command == 'getattr':

2035

1581

attrname = request[1]

2036

1582

if callable(client_object.__getattribute__(attrname)):

2037

1583

parent_pipe.send(('function',))

2038

1584

else:

2039

parent_pipe.send(('data', client_object

2040

.__getattribute__(attrname)))

1585

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

2041

1586

2042

1587

if command == 'setattr':

2043

1588

attrname = request[1]

2044

1589

value = request[2]

2045

1590

setattr(client_object, attrname, value)

2046

1591

2047

1592

return True

2048

1593

2049

1594

2086

1631

return timevalue

2087

1632

2088

1633

1634

def if_nametoindex(interface):

1635

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

1636

1637

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

1638

global if_nametoindex

1639

try:

1640

if_nametoindex = (ctypes.cdll.LoadLibrary

1641

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

1642

.if_nametoindex)

1643

except (OSError, AttributeError):

1644

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

1645

def if_nametoindex(interface):

1646

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

1647

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

1648

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

1649

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1650

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

1651

interface))

1652

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

1653

ifreq[16:20])[0]

1654

return interface_index

1655

return if_nametoindex(interface)

1656

1657

2089

1658

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

2090

1659

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

2091

1660

2099

1668

sys.exit()

2100

1669

if not noclose:

2101

1670

# Close all standard open file descriptors

2102

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

1671

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

2103

1672

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

2104

1673

raise OSError(errno.ENODEV,

2105

1674

"%s not a character device"

2106

% os.devnull)

1675

% os.path.devnull)

2107

1676

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

2108

1677

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

2109

1678

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

2146

1715

" system bus interface")

2147

1716

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

2148

1717

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

2149

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

2150

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

2151

" state")

2152

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

2153

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

2154

2155

1718

options = parser.parse_args()

2156

1719

2157

1720

if options.check:

2170

1733

"use_dbus": "True",

2171

1734

"use_ipv6": "True",

2172

1735

"debuglevel": "",

2173

"restore": "True",

2174

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

2175

1736

}

2176

1737

2177

1738

# Parse config file for server-global settings

2194

1755

# options, if set.

2195

1756

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

2196

1757

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

2197

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

2198

"statedir"):

1758

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

2199

1759

value = getattr(options, option)

2200

1760

if value is not None:

2201

1761

server_settings[option] = value

2213

1773

debuglevel = server_settings["debuglevel"]

2214

1774

use_dbus = server_settings["use_dbus"]

2215

1775

use_ipv6 = server_settings["use_ipv6"]

2216

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

2217

stored_state_file)

2218

2219

if debug:

2220

initlogger(debug, logging.DEBUG)

2221

else:

2222

if not debuglevel:

2223

initlogger(debug)

2224

else:

2225

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

2226

initlogger(debug, level)

2227

1776

2228

1777

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

2229

1778

syslogger.setFormatter(logging.Formatter

2230

1779

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

2232

1781

% server_settings["servicename"]))

2233

1782

2234

1783

# Parse config file with clients

2235

client_config = configparser.SafeConfigParser(Client

2236

.client_defaults)

1784

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

1785

"extended_timeout": "15m",

1786

"interval": "2m",

1787

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

1788

"host": "",

1789

"approval_delay": "0s",

1790

"approval_duration": "1s",

1791

}

1792

client_config = configparser.SafeConfigParser(client_defaults)

2237

1793

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

2238

1794

"clients.conf"))

2239

1795

2277

1833

if error[0] != errno.EPERM:

2278

1834

raise error

2279

1835

1836

if not debug and not debuglevel:

1837

syslogger.setLevel(logging.WARNING)

1838

console.setLevel(logging.WARNING)

1839

if debuglevel:

1840

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

1841

syslogger.setLevel(level)

1842

console.setLevel(level)

1843

2280

1844

if debug:

2281

1845

# Enable all possible GnuTLS debugging

2282

1846

2292

1856

.gnutls_global_set_log_function(debug_gnutls))

2293

1857

2294

1858

# Redirect stdin so all checkers get /dev/null

2295

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

1859

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

2296

1860

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

2297

1861

if null > 2:

2298

1862

os.close(null)

1863

else:

1864

# No console logging

1865

logger.removeHandler(console)

2299

1866

2300

1867

# Need to fork before connecting to D-Bus

2301

1868

if not debug:

2302

1869

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

2303

1870

daemon()

2304

1871

2305

gobject.threads_init()

2306

2307

1872

global main_loop

2308

1873

# From the Avahi example code

2309

DBusGMainLoop(set_as_default=True)

1874

DBusGMainLoop(set_as_default=True )

2310

1875

main_loop = gobject.MainLoop()

2311

1876

bus = dbus.SystemBus()

2312

1877

# End of Avahi example code

2313

1878

if use_dbus:

2314

1879

try:

2315

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

1880

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

2316

1881

bus, do_not_queue=True)

2317

old_bus_name = (dbus.service.BusName

2318

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

2319

do_not_queue=True))

2320

1882

except dbus.exceptions.NameExistsException as e:

2321

1883

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

2322

1884

use_dbus = False

2323

1885

server_settings["use_dbus"] = False

2324

1886

tcp_server.use_dbus = False

2325

1887

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2326

service = AvahiServiceToSyslog(name =

2327

server_settings["servicename"],

2328

servicetype = "_mandos._tcp",

2329

protocol = protocol, bus = bus)

1888

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

1889

servicetype = "_mandos._tcp",

1890

protocol = protocol, bus = bus)

2330

1891

if server_settings["interface"]:

2331

1892

service.interface = (if_nametoindex

2332

1893

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

2336

1897

2337

1898

client_class = Client

2338

1899

if use_dbus:

2339

client_class = functools.partial(ClientDBusTransitional,

2340

bus = bus)

2341

2342

client_settings = Client.config_parser(client_config)

2343

old_client_settings = {}

2344

clients_data = {}

2345

2346

# Get client data and settings from last running state.

2347

if server_settings["restore"]:

2348

try:

2349

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

2350

clients_data, old_client_settings = (pickle.load

2351

(stored_state))

2352

os.remove(stored_state_path)

2353

except IOError as e:

2354

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

2355

.format(e))

2356

if e.errno != errno.ENOENT:

2357

raise

2358

except EOFError as e:

2359

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

2360

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

2361

2362

with PGPEngine() as pgp:

2363

for client_name, client in clients_data.iteritems():

2364

# Decide which value to use after restoring saved state.

2365

# We have three different values: Old config file,

2366

# new config file, and saved state.

2367

# New config value takes precedence if it differs from old

2368

# config value, otherwise use saved state.

2369

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

2370

try:

2371

# For each value in new config, check if it

2372

# differs from the old config value (Except for

2373

# the "secret" attribute)

2374

if (name != "secret" and

2375

value != old_client_settings[client_name]

2376

[name]):

2377

client[name] = value

2378

except KeyError:

2379

pass

2380

2381

# Clients who has passed its expire date can still be

2382

# enabled if its last checker was successful. Clients

2383

# whose checker succeeded before we stored its state is

2384

# assumed to have successfully run all checkers during

2385

# downtime.

2386

if client["enabled"]:

2387

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

2388

if not client["last_checked_ok"]:

2389

logger.warning(

2390

"disabling client {0} - Client never "

2391

"performed a successful checker"

2392

.format(client_name))

2393

client["enabled"] = False

2394

elif client["last_checker_status"] != 0:

2395

logger.warning(

2396

"disabling client {0} - Client "

2397

"last checker failed with error code {1}"

2398

.format(client_name,

2399

client["last_checker_status"]))

2400

client["enabled"] = False

2401

else:

2402

client["expires"] = (datetime.datetime

2403

.utcnow()

2404

+ client["timeout"])

2405

logger.debug("Last checker succeeded,"

2406

" keeping {0} enabled"

2407

.format(client_name))

1900

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

1901

def client_config_items(config, section):

1902

special_settings = {

1903

"approved_by_default":

1904

lambda: config.getboolean(section,

1905

"approved_by_default"),

1906

}

1907

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

2408

1908

try:

2409

client["secret"] = (

2410

pgp.decrypt(client["encrypted_secret"],

2411

client_settings[client_name]

2412

["secret"]))

2413

except PGPError:

2414

# If decryption fails, we use secret from new settings

2415

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

2416

.format(client_name))

2417

client["secret"] = (

2418

client_settings[client_name]["secret"])

2419

2420

2421

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

2422

for client_name in (set(old_client_settings)

2423

- set(client_settings)):

2424

del clients_data[client_name]

2425

for client_name in (set(client_settings)

2426

- set(old_client_settings)):

2427

clients_data[client_name] = client_settings[client_name]

2428

2429

# Create all client objects

2430

for client_name, client in clients_data.iteritems():

2431

tcp_server.clients[client_name] = client_class(

2432

name = client_name, settings = client)

2433

1909

yield (name, special_settings[name]())

1910

except KeyError:

1911

yield (name, value)

1912

1913

tcp_server.clients.update(set(

1914

client_class(name = section,

1915

config= dict(client_config_items(

1916

client_config, section)))

1917

for section in client_config.sections()))

2434

1918

if not tcp_server.clients:

2435

1919

logger.warning("No clients defined")

2436

1920

2447

1931

# "pidfile" was never created

2448

1932

pass

2449

1933

del pidfilename

1934

2450

1935

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

2451

1936

2452

1937

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

2453

1938

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

2454

1939

2455

1940

if use_dbus:

2456

class MandosDBusService(DBusObjectWithProperties):

1941

class MandosDBusService(dbus.service.Object):

2457

1942

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

2458

1943

def __init__(self):

2459

1944

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

2460

_interface = "se.recompile.Mandos"

2461

2462

@dbus_interface_annotations(_interface)

2463

def _foo(self):

2464

return { "org.freedesktop.DBus.Property"

2465

".EmitsChangedSignal":

2466

"false"}

1945

_interface = "se.bsnet.fukt.Mandos"

2467

1946

2468

1947

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

2469

1948

def ClientAdded(self, objpath):

2484

1963

def GetAllClients(self):

2485

1964

"D-Bus method"

2486

1965

return dbus.Array(c.dbus_object_path

2487

for c in

2488

tcp_server.clients.itervalues())

1966

for c in tcp_server.clients)

2489

1967

2490

1968

@dbus.service.method(_interface,

2491

1969

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

2493

1971

"D-Bus method"

2494

1972

return dbus.Dictionary(

2495

1973

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

2496

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

1974

for c in tcp_server.clients),

2497

1975

signature="oa{sv}")

2498

1976

2499

1977

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

2500

1978

def RemoveClient(self, object_path):

2501

1979

"D-Bus method"

2502

for c in tcp_server.clients.itervalues():

1980

for c in tcp_server.clients:

2503

1981

if c.dbus_object_path == object_path:

2504

del tcp_server.clients[c.name]

1982

tcp_server.clients.remove(c)

2505

1983

c.remove_from_connection()

2506

1984

# Don't signal anything except ClientRemoved

2507

1985

c.disable(quiet=True)

2512

1990

2513

1991

del _interface

2514

1992

2515

class MandosDBusServiceTransitional(MandosDBusService):

2516

__metaclass__ = AlternateDBusNamesMetaclass

2517

mandos_dbus_service = MandosDBusServiceTransitional()

1993

mandos_dbus_service = MandosDBusService()

2518

1994

2519

1995

def cleanup():

2520

1996

"Cleanup function; run on exit"

2521

1997

service.cleanup()

2522

1998

2523

multiprocessing.active_children()

2524

if not (tcp_server.clients or client_settings):

2525

return

2526

2527

# Store client before exiting. Secrets are encrypted with key

2528

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

2529

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

2530

clients = {}

2531

with PGPEngine() as pgp:

2532

for client in tcp_server.clients.itervalues():

2533

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

2534

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

2535

key)

2536

client_dict = {}

2537

2538

# A list of attributes that can not be pickled

2539

# + secret.

2540

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

2541

"checker"))

2542

for name, typ in (inspect.getmembers

2543

(dbus.service.Object)):

2544

exclude.add(name)

2545

2546

client_dict["encrypted_secret"] = (client

2547

.encrypted_secret)

2548

for attr in client.client_structure:

2549

if attr not in exclude:

2550

client_dict[attr] = getattr(client, attr)

2551

2552

clients[client.name] = client_dict

2553

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

2554

2555

try:

2556

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

2557

prefix="clients-",

2558

dir=os.path.dirname

2559

(stored_state_path))

2560

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

2561

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

2562

os.rename(tempname, stored_state_path)

2563

except (IOError, OSError) as e:

2564

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

2565

.format(e))

2566

if not debug:

2567

try:

2568

os.remove(tempname)

2569

except NameError:

2570

pass

2571

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

2572

errno.EEXIST)):

2573

raise e

2574

2575

# Delete all clients, and settings from config

2576

1999

while tcp_server.clients:

2577

name, client = tcp_server.clients.popitem()

2000

client = tcp_server.clients.pop()

2578

2001

if use_dbus:

2579

2002

client.remove_from_connection()

2003

client.disable_hook = None

2580

2004

# Don't signal anything except ClientRemoved

2581

2005

client.disable(quiet=True)

2582

2006

if use_dbus:

2583

2007

# Emit D-Bus signal

2584

mandos_dbus_service.ClientRemoved(client

2585

.dbus_object_path,

2008

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2586

2009

client.name)

2587

client_settings.clear()

2588

2010

2589

2011

atexit.register(cleanup)

2590

2012

2591

for client in tcp_server.clients.itervalues():

2013

for client in tcp_server.clients:

2592

2014

if use_dbus:

2593

2015

# Emit D-Bus signal

2594

2016

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2595

# Need to initiate checking of clients

2596

if client.enabled:

2597

client.init_checker()

2017

client.enable()

2598

2018

2599

2019

tcp_server.enable()

2600

2020

tcp_server.server_activate()