/mandos/trunk : revision 493

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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 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) 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) 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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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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class Client(object):

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

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Attributes:

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

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

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

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

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

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

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checker_initiator_tag: a gobject event source tag, or None

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

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client_structure: Object describing what attributes a client has

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and is used for storing the client at exit

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current_checker_command: string; current running checker_command

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

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disable_initiator_tag: a gobject event source tag, or None

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enabled: bool()

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

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

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

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

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last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, -2 means no checker completed yet.

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

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last_enabled: datetime.datetime(); (UTC)

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

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D-Bus identifiers

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

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

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until this client is disabled

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extended_timeout: extra long timeout when secret has been sent

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runtime_expansions: Allowed attributes for runtime expansion.

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

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disabled, or None

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"""

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runtime_expansions = ("approval_delay", "approval_duration",

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

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

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

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

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"extended_timeout": "15m",

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"interval": "2m",

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

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"host": "",

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"approval_delay": "0s",

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"approval_duration": "1s",

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"approved_by_default": "True",

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"enabled": "True",

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}

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@staticmethod

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def _timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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def timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.timeout)

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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.extended_timeout)

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return self._timedelta_to_milliseconds(self.timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return timedelta_to_milliseconds(self.interval)

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return self._timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

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return timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

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def config_parser(config):

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

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

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with exceptions for any special settings as defined above.

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

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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

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client["approved_by_default"] = config.getboolean(

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client_name, "approved_by_default")

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

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"enabled")

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

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.replace(" ", ""))

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if "secret" in section:

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

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elif "secfile" in section:

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

487

(section["secfile"])),

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"rb") as secfile:

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

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else:

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

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% section)

493

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"]

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client["last_approval_request"] = None

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client["last_checked_ok"] = None

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client["last_checker_status"] = -2

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return settings

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

324

return self._timedelta_to_milliseconds(self.approval_delay)

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

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

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

512

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attribute."""

513

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self.name = name

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# adding all client settings

515

for setting, value in settings.iteritems():

516

setattr(self, setting, value)

517

518

if self.enabled:

519

if not hasattr(self, "last_enabled"):

520

self.last_enabled = datetime.datetime.utcnow()

521

if not hasattr(self, "expires"):

522

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

523

+ self.timeout)

524

else:

525

self.last_enabled = None

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self.expires = None

527

331

if config is None:

332

config = {}

528

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

529

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# Uppercase and remove spaces from fingerprint for later

530

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# comparison purposes with return value from the fingerprint()

531

336

# function

337

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

338

.replace(" ", ""))

532

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

533

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

534

datetime.datetime.utcnow())

535

536

# attributes specific for this server instance

340

if "secret" in config:

341

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

342

elif "secfile" in config:

343

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

344

(config["secfile"])),

345

"rb") as secfile:

346

self.secret = secfile.read()

347

else:

348

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

349

% self.name)

350

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

351

self.created = datetime.datetime.utcnow()

352

self.enabled = False

353

self.last_approval_request = None

354

self.last_enabled = None

355

self.last_checked_ok = None

356

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

357

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

358

self.disable_hook = disable_hook

537

359

self.checker = None

538

360

self.checker_initiator_tag = None

539

361

self.disable_initiator_tag = None

540

362

self.checker_callback_tag = None

363

self.checker_command = config["checker"]

541

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self.current_checker_command = None

542

self.approved = None

365

self.last_connect = None

366

self._approved = None

367

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

368

True)

543

369

self.approvals_pending = 0

544

self.changedstate = (multiprocessing_manager

545

.Condition(multiprocessing_manager

546

.Lock()))

547

self.client_structure = [attr for attr in

548

self.__dict__.iterkeys()

549

if not attr.startswith("_")]

550

self.client_structure.append("client_structure")

551

552

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

553

lambda obj:

554

isinstance(obj,

555

property)):

556

if not name.startswith("_"):

557

self.client_structure.append(name)

370

self.approval_delay = string_to_delta(

371

config["approval_delay"])

372

self.approval_duration = string_to_delta(

373

config["approval_duration"])

374

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

558

375

559

# Send notice to process children that client state has changed

560

376

def send_changedstate(self):

561

with self.changedstate:

562

self.changedstate.notify_all()

563

377

self.changedstate.acquire()

378

self.changedstate.notify_all()

379

self.changedstate.release()

380

564

381

def enable(self):

565

382

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

566

383

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

567

384

# Already enabled

568

385

return

569

386

self.send_changedstate()

570

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

571

self.enabled = True

572

387

self.last_enabled = datetime.datetime.utcnow()

573

self.init_checker()

388

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

389

# and every interval from then on.

390

self.checker_initiator_tag = (gobject.timeout_add

391

(self.interval_milliseconds(),

392

self.start_checker))

393

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

394

self.disable_initiator_tag = (gobject.timeout_add

395

(self.timeout_milliseconds(),

396

self.disable))

397

self.enabled = True

398

# Also start a new checker *right now*.

399

self.start_checker()

574

400

575

401

def disable(self, quiet=True):

576

402

"""Disable this client."""

583

409

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

584

410

gobject.source_remove(self.disable_initiator_tag)

585

411

self.disable_initiator_tag = None

586

self.expires = None

587

412

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

588

413

gobject.source_remove(self.checker_initiator_tag)

589

414

self.checker_initiator_tag = None

590

415

self.stop_checker()

416

if self.disable_hook:

417

self.disable_hook(self)

591

418

self.enabled = False

592

419

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

593

420

return False

594

421

595

422

def __del__(self):

423

self.disable_hook = None

596

424

self.disable()

597

425

598

def init_checker(self):

599

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

600

# and every interval from then on.

601

self.checker_initiator_tag = (gobject.timeout_add

602

(self.interval_milliseconds(),

603

self.start_checker))

604

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

605

self.disable_initiator_tag = (gobject.timeout_add

606

(self.timeout_milliseconds(),

607

self.disable))

608

# Also start a new checker *right now*.

609

self.start_checker()

610

611

426

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

612

427

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

613

428

self.checker_callback_tag = None

614

429

self.checker = None

615

430

if os.WIFEXITED(condition):

616

self.last_checker_status = os.WEXITSTATUS(condition)

617

if self.last_checker_status == 0:

431

exitstatus = os.WEXITSTATUS(condition)

432

if exitstatus == 0:

618

433

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

619

434

vars(self))

620

435

self.checked_ok()

622

437

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

623

438

vars(self))

624

439

else:

625

self.last_checker_status = -1

626

440

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

627

441

vars(self))

628

442

629

443

def checked_ok(self):

630

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

444

"""Bump up the timeout for this client.

445

446

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

447

alive and well.

448

"""

631

449

self.last_checked_ok = datetime.datetime.utcnow()

632

self.last_checker_status = 0

633

self.bump_timeout()

634

635

def bump_timeout(self, timeout=None):

636

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

637

if timeout is None:

638

timeout = self.timeout

639

if self.disable_initiator_tag is not None:

640

gobject.source_remove(self.disable_initiator_tag)

641

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

642

self.disable_initiator_tag = (gobject.timeout_add

643

(timedelta_to_milliseconds

644

(timeout), self.disable))

645

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

450

gobject.source_remove(self.disable_initiator_tag)

451

self.disable_initiator_tag = (gobject.timeout_add

452

(self.timeout_milliseconds(),

453

self.disable))

646

454

647

455

def need_approval(self):

648

456

self.last_approval_request = datetime.datetime.utcnow()

688

496

'replace')))

689

497

for attr in

690

498

self.runtime_expansions)

691

499

692

500

try:

693

501

command = self.checker_command % escaped_attrs

694

502

except TypeError as error:

740

548

raise

741

549

self.checker = None

742

550

743

744

551

def dbus_service_property(dbus_interface, signature="v",

745

552

access="readwrite", byte_arrays=False):

746

553

"""Decorators for marking methods of a DBusObjectWithProperties to

792

599

793

600

class DBusObjectWithProperties(dbus.service.Object):

794

601

"""A D-Bus object with properties.

795

602

796

603

Classes inheriting from this can use the dbus_service_property

797

604

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

798

605

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

805

612

def _get_all_dbus_properties(self):

806

613

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

807

614

"""

808

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

809

for cls in self.__class__.__mro__

615

return ((prop._dbus_name, prop)

810

616

for name, prop in

811

inspect.getmembers(cls, self._is_dbus_property))

617

inspect.getmembers(self, self._is_dbus_property))

812

618

813

619

def _get_dbus_property(self, interface_name, property_name):

814

620

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

815

621

property with the specified name and interface.

816

622

"""

817

for cls in self.__class__.__mro__:

818

for name, value in (inspect.getmembers

819

(cls, self._is_dbus_property)):

820

if (value._dbus_name == property_name

821

and value._dbus_interface == interface_name):

822

return value.__get__(self)

823

623

for name in (property_name,

624

property_name + "_dbus_property"):

625

prop = getattr(self, name, None)

626

if (prop is None

627

or not self._is_dbus_property(prop)

628

or prop._dbus_name != property_name

629

or (interface_name and prop._dbus_interface

630

and interface_name != prop._dbus_interface)):

631

continue

632

return prop

824

633

# No such property

825

634

raise DBusPropertyNotFound(self.dbus_object_path + ":"

826

635

+ interface_name + "."

851

660

# signatures other than "ay".

852

661

if prop._dbus_signature != "ay":

853

662

raise ValueError

854

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

855

for byte in value))

663

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

664

for byte in value))

856

665

prop(value)

857

666

858

667

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

860

669

def GetAll(self, interface_name):

861

670

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

862

671

standard.

863

672

864

673

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

865

674

"""

866

properties = {}

675

all = {}

867

676

for name, prop in self._get_all_dbus_properties():

868

677

if (interface_name

869

678

and interface_name != prop._dbus_interface):

874

683

continue

875

684

value = prop()

876

685

if not hasattr(value, "variant_level"):

877

properties[name] = value

686

all[name] = value

878

687

continue

879

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

880

value.variant_level+1)

881

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

688

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

689

value.variant_level+1)

690

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

882

691

883

692

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

884

693

out_signature="s",

928

737

return xmlstring

929

738

930

739

931

def datetime_to_dbus (dt, variant_level=0):

932

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

933

if dt is None:

934

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

935

return dbus.String(dt.isoformat(),

936

variant_level=variant_level)

937

938

939

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

940

.__metaclass__):

941

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

942

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

943

"""

944

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

945

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

946

# methods, signals, or properties in them

947

for base in (b for b in bases

948

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

949

# Go though all attributes of the base class

950

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

951

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

952

# with the wrong interface name

953

if (not hasattr(attribute, "_dbus_interface")

954

or not attribute._dbus_interface

955

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

956

continue

957

# Create an alternate D-Bus interface name based on

958

# the current name

959

alt_interface = (attribute._dbus_interface

960

.replace("se.recompile.Mandos",

961

"se.bsnet.fukt.Mandos"))

962

# Is this a D-Bus signal?

963

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

964

# Extract the original non-method function by

965

# black magic

966

nonmethod_func = (dict(

967

zip(attribute.func_code.co_freevars,

968

attribute.__closure__))["func"]

969

.cell_contents)

970

# Create a new, but exactly alike, function

971

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

972

# with the alternate D-Bus interface name

973

new_function = (dbus.service.signal

974

(alt_interface,

975

attribute._dbus_signature)

976

(types.FunctionType(

977

nonmethod_func.func_code,

978

nonmethod_func.func_globals,

979

nonmethod_func.func_name,

980

nonmethod_func.func_defaults,

981

nonmethod_func.func_closure)))

982

# Define a creator of a function to call both the

983

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

984

# signals gets sent when the function is called

985

def fixscope(func1, func2):

986

"""This function is a scope container to pass

987

func1 and func2 to the "call_both" function

988

outside of its arguments"""

989

def call_both(*args, **kwargs):

990

"""This function will emit two D-Bus

991

signals by calling func1 and func2"""

992

func1(*args, **kwargs)

993

func2(*args, **kwargs)

994

return call_both

995

# Create the "call_both" function and add it to

996

# the class

997

attr[attrname] = fixscope(attribute,

998

new_function)

999

# Is this a D-Bus method?

1000

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

1001

# Create a new, but exactly alike, function

1002

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

1003

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

1004

# to the class.

1005

attr[attrname] = (dbus.service.method

1006

(alt_interface,

1007

attribute._dbus_in_signature,

1008

attribute._dbus_out_signature)

1009

(types.FunctionType

1010

(attribute.func_code,

1011

attribute.func_globals,

1012

attribute.func_name,

1013

attribute.func_defaults,

1014

attribute.func_closure)))

1015

# Is this a D-Bus property?

1016

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

1017

# Create a new, but exactly alike, function

1018

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

1019

# property with the alternate D-Bus interface

1020

# name. Add it to the class.

1021

attr[attrname] = (dbus_service_property

1022

(alt_interface,

1023

attribute._dbus_signature,

1024

attribute._dbus_access,

1025

attribute

1026

._dbus_get_args_options

1027

["byte_arrays"])

1028

(types.FunctionType

1029

(attribute.func_code,

1030

attribute.func_globals,

1031

attribute.func_name,

1032

attribute.func_defaults,

1033

attribute.func_closure)))

1034

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

1035

1036

1037

740

class ClientDBus(Client, DBusObjectWithProperties):

1038

741

"""A Client class using D-Bus

1039

742

1048

751

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

1049

752

1050

753

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

754

self._approvals_pending = 0

1051

755

self.bus = bus

1052

756

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

1053

757

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

1060

764

DBusObjectWithProperties.__init__(self, self.bus,

1061

765

self.dbus_object_path)

1062

766

1063

def notifychangeproperty(transform_func,

1064

dbus_name, type_func=lambda x: x,

1065

variant_level=1):

1066

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

1067

its changes to DBus.

1068

1069

transform_fun: Function that takes a value and a variant_level

1070

and transforms it to a D-Bus type.

1071

dbus_name: D-Bus name of the variable

1072

type_func: Function that transform the value before sending it

1073

to the D-Bus. Default: no transform

1074

variant_level: D-Bus variant level. Default: 1

1075

"""

1076

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

1077

def setter(self, value):

1078

if hasattr(self, "dbus_object_path"):

1079

if (not hasattr(self, attrname) or

1080

type_func(getattr(self, attrname, None))

1081

!= type_func(value)):

1082

dbus_value = transform_func(type_func(value),

1083

variant_level

1084

=variant_level)

1085

self.PropertyChanged(dbus.String(dbus_name),

1086

dbus_value)

1087

setattr(self, attrname, value)

1088

1089

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

1090

1091

1092

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1093

approvals_pending = notifychangeproperty(dbus.Boolean,

1094

"ApprovalPending",

1095

type_func = bool)

1096

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

1097

last_enabled = notifychangeproperty(datetime_to_dbus,

1098

"LastEnabled")

1099

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

1100

type_func = lambda checker:

1101

checker is not None)

1102

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1103

"LastCheckedOK")

1104

last_checker_status = notifychangeproperty(dbus.Int16,

1105

"LastCheckerStatus")

1106

last_approval_request = notifychangeproperty(

1107

datetime_to_dbus, "LastApprovalRequest")

1108

approved_by_default = notifychangeproperty(dbus.Boolean,

1109

"ApprovedByDefault")

1110

approval_delay = notifychangeproperty(dbus.UInt64,

1111

"ApprovalDelay",

1112

type_func =

1113

timedelta_to_milliseconds)

1114

approval_duration = notifychangeproperty(

1115

dbus.UInt64, "ApprovalDuration",

1116

type_func = timedelta_to_milliseconds)

1117

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

1118

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

1119

type_func =

1120

timedelta_to_milliseconds)

1121

extended_timeout = notifychangeproperty(

1122

dbus.UInt64, "ExtendedTimeout",

1123

type_func = timedelta_to_milliseconds)

1124

interval = notifychangeproperty(dbus.UInt64,

1125

"Interval",

1126

type_func =

1127

timedelta_to_milliseconds)

1128

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

1129

1130

del notifychangeproperty

767

def _get_approvals_pending(self):

768

return self._approvals_pending

769

def _set_approvals_pending(self, value):

770

old_value = self._approvals_pending

771

self._approvals_pending = value

772

bval = bool(value)

773

if (hasattr(self, "dbus_object_path")

774

and bval is not bool(old_value)):

775

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

776

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

777

dbus_bool)

778

779

approvals_pending = property(_get_approvals_pending,

780

_set_approvals_pending)

781

del _get_approvals_pending, _set_approvals_pending

782

783

@staticmethod

784

def _datetime_to_dbus(dt, variant_level=0):

785

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

786

return dbus.String(dt.isoformat(),

787

variant_level=variant_level)

788

789

def enable(self):

790

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

791

r = Client.enable(self)

792

if oldstate != self.enabled:

793

# Emit D-Bus signals

794

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

795

dbus.Boolean(True, variant_level=1))

796

self.PropertyChanged(

797

dbus.String("LastEnabled"),

798

self._datetime_to_dbus(self.last_enabled,

799

variant_level=1))

800

return r

801

802

def disable(self, quiet = False):

803

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

804

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

805

if not quiet and oldstate != self.enabled:

806

# Emit D-Bus signal

807

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

808

dbus.Boolean(False, variant_level=1))

809

return r

1131

810

1132

811

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

1133

812

try:

1142

821

*args, **kwargs):

1143

822

self.checker_callback_tag = None

1144

823

self.checker = None

824

# Emit D-Bus signal

825

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

826

dbus.Boolean(False, variant_level=1))

1145

827

if os.WIFEXITED(condition):

1146

828

exitstatus = os.WEXITSTATUS(condition)

1147

829

# Emit D-Bus signal

1157

839

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

1158

840

*args, **kwargs)

1159

841

842

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

843

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

844

# Emit D-Bus signal

845

self.PropertyChanged(

846

dbus.String("LastCheckedOK"),

847

(self._datetime_to_dbus(self.last_checked_ok,

848

variant_level=1)))

849

850

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

851

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

852

# Emit D-Bus signal

853

self.PropertyChanged(

854

dbus.String("LastApprovalRequest"),

855

(self._datetime_to_dbus(self.last_approval_request,

856

variant_level=1)))

857

return r

858

1160

859

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

1161

860

old_checker = self.checker

1162

861

if self.checker is not None:

1169

868

and old_checker_pid != self.checker.pid):

1170

869

# Emit D-Bus signal

1171

870

self.CheckerStarted(self.current_checker_command)

871

self.PropertyChanged(

872

dbus.String("CheckerRunning"),

873

dbus.Boolean(True, variant_level=1))

1172

874

return r

1173

875

876

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

877

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

878

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

879

if (old_checker is not None

880

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

881

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

882

dbus.Boolean(False, variant_level=1))

883

return r

884

1174

885

def _reset_approved(self):

1175

self.approved = None

886

self._approved = None

1176

887

return False

1177

888

1178

889

def approve(self, value=True):

1179

890

self.send_changedstate()

1180

self.approved = value

1181

gobject.timeout_add(timedelta_to_milliseconds

891

self._approved = value

892

gobject.timeout_add(self._timedelta_to_milliseconds

1182

893

(self.approval_duration),

1183

894

self._reset_approved)

1184

895

1185

896

1186

897

## D-Bus methods, signals & properties

1187

_interface = "se.recompile.Mandos.Client"

898

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

1188

899

1189

900

## Signals

1190

901

1276

987

if value is None: # get

1277

988

return dbus.Boolean(self.approved_by_default)

1278

989

self.approved_by_default = bool(value)

990

# Emit D-Bus signal

991

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

992

dbus.Boolean(value, variant_level=1))

1279

993

1280

994

# ApprovalDelay - property

1281

995

@dbus_service_property(_interface, signature="t",

1284

998

if value is None: # get

1285

999

return dbus.UInt64(self.approval_delay_milliseconds())

1286

1000

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

1001

# Emit D-Bus signal

1002

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

1003

dbus.UInt64(value, variant_level=1))

1287

1004

1288

1005

# ApprovalDuration - property

1289

1006

@dbus_service_property(_interface, signature="t",

1290

1007

access="readwrite")

1291

1008

def ApprovalDuration_dbus_property(self, value=None):

1292

1009

if value is None: # get

1293

return dbus.UInt64(timedelta_to_milliseconds(

1010

return dbus.UInt64(self._timedelta_to_milliseconds(

1294

1011

self.approval_duration))

1295

1012

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

1013

# Emit D-Bus signal

1014

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

1015

dbus.UInt64(value, variant_level=1))

1296

1016

1297

1017

# Name - property

1298

1018

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

1310

1030

def Host_dbus_property(self, value=None):

1311

1031

if value is None: # get

1312

1032

return dbus.String(self.host)

1313

self.host = unicode(value)

1033

self.host = value

1034

# Emit D-Bus signal

1035

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

1036

dbus.String(value, variant_level=1))

1314

1037

1315

1038

# Created - property

1316

1039

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

1317

1040

def Created_dbus_property(self):

1318

return datetime_to_dbus(self.created)

1041

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

1319

1042

1320

1043

# LastEnabled - property

1321

1044

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

1322

1045

def LastEnabled_dbus_property(self):

1323

return datetime_to_dbus(self.last_enabled)

1046

if self.last_enabled is None:

1047

return dbus.String("")

1048

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

1324

1049

1325

1050

# Enabled - property

1326

1051

@dbus_service_property(_interface, signature="b",

1340

1065

if value is not None:

1341

1066

self.checked_ok()

1342

1067

return

1343

return datetime_to_dbus(self.last_checked_ok)

1344

1345

# LastCheckerStatus - property

1346

@dbus_service_property(_interface, signature="n",

1347

access="read")

1348

def LastCheckerStatus_dbus_property(self):

1349

return dbus.Int16(self.last_checker_status)

1350

1351

# Expires - property

1352

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

1353

def Expires_dbus_property(self):

1354

return datetime_to_dbus(self.expires)

1068

if self.last_checked_ok is None:

1069

return dbus.String("")

1070

return dbus.String(self._datetime_to_dbus(self

1071

.last_checked_ok))

1355

1072

1356

1073

# LastApprovalRequest - property

1357

1074

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

1358

1075

def LastApprovalRequest_dbus_property(self):

1359

return datetime_to_dbus(self.last_approval_request)

1076

if self.last_approval_request is None:

1077

return dbus.String("")

1078

return dbus.String(self.

1079

_datetime_to_dbus(self

1080

.last_approval_request))

1360

1081

1361

1082

# Timeout - property

1362

1083

@dbus_service_property(_interface, signature="t",

1365

1086

if value is None: # get

1366

1087

return dbus.UInt64(self.timeout_milliseconds())

1367

1088

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

1089

# Emit D-Bus signal

1090

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

1091

dbus.UInt64(value, variant_level=1))

1092

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

1093

return

1368

1094

# Reschedule timeout

1369

if self.enabled:

1370

now = datetime.datetime.utcnow()

1371

time_to_die = timedelta_to_milliseconds(

1372

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

1373

if time_to_die <= 0:

1374

# The timeout has passed

1375

self.disable()

1376

else:

1377

self.expires = (now +

1378

datetime.timedelta(milliseconds =

1379

time_to_die))

1380

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

1381

is None):

1382

return

1383

gobject.source_remove(self.disable_initiator_tag)

1384

self.disable_initiator_tag = (gobject.timeout_add

1385

(time_to_die,

1386

self.disable))

1387

1388

# ExtendedTimeout - property

1389

@dbus_service_property(_interface, signature="t",

1390

access="readwrite")

1391

def ExtendedTimeout_dbus_property(self, value=None):

1392

if value is None: # get

1393

return dbus.UInt64(self.extended_timeout_milliseconds())

1394

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

1095

gobject.source_remove(self.disable_initiator_tag)

1096

self.disable_initiator_tag = None

1097

time_to_die = (self.

1098

_timedelta_to_milliseconds((self

1099

.last_checked_ok

1100

+ self.timeout)

1101

- datetime.datetime

1102

.utcnow()))

1103

if time_to_die <= 0:

1104

# The timeout has passed

1105

self.disable()

1106

else:

1107

self.disable_initiator_tag = (gobject.timeout_add

1108

(time_to_die, self.disable))

1395

1109

1396

1110

# Interval - property

1397

1111

@dbus_service_property(_interface, signature="t",

1400

1114

if value is None: # get

1401

1115

return dbus.UInt64(self.interval_milliseconds())

1402

1116

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

1117

# Emit D-Bus signal

1118

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

1119

dbus.UInt64(value, variant_level=1))

1403

1120

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

1404

1121

return

1405

if self.enabled:

1406

# Reschedule checker run

1407

gobject.source_remove(self.checker_initiator_tag)

1408

self.checker_initiator_tag = (gobject.timeout_add

1409

(value, self.start_checker))

1410

self.start_checker() # Start one now, too

1411

1122

# Reschedule checker run

1123

gobject.source_remove(self.checker_initiator_tag)

1124

self.checker_initiator_tag = (gobject.timeout_add

1125

(value, self.start_checker))

1126

self.start_checker() # Start one now, too

1127

1412

1128

# Checker - property

1413

1129

@dbus_service_property(_interface, signature="s",

1414

1130

access="readwrite")

1415

1131

def Checker_dbus_property(self, value=None):

1416

1132

if value is None: # get

1417

1133

return dbus.String(self.checker_command)

1418

self.checker_command = unicode(value)

1134

self.checker_command = value

1135

# Emit D-Bus signal

1136

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

1137

dbus.String(self.checker_command,

1138

variant_level=1))

1419

1139

1420

1140

# CheckerRunning - property

1421

1141

@dbus_service_property(_interface, signature="b",

1448

1168

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

1449

1169

if not self._pipe.recv():

1450

1170

raise KeyError()

1451

1171

1452

1172

def __getattribute__(self, name):

1453

if name == '_pipe':

1173

if(name == '_pipe'):

1454

1174

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

1455

1175

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

1456

1176

data = self._pipe.recv()

1461

1181

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

1462

1182

return self._pipe.recv()[1]

1463

1183

return func

1464

1184

1465

1185

def __setattr__(self, name, value):

1466

if name == '_pipe':

1186

if(name == '_pipe'):

1467

1187

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

1468

1188

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

1469

1189

1470

1190

1471

class ClientDBusTransitional(ClientDBus):

1472

__metaclass__ = AlternateDBusNamesMetaclass

1473

1474

1475

1191

class ClientHandler(socketserver.BaseRequestHandler, object):

1476

1192

"""A class to handle client connections.

1477

1193

1484

1200

unicode(self.client_address))

1485

1201

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

1486

1202

self.server.child_pipe.fileno())

1487

1203

1488

1204

session = (gnutls.connection

1489

1205

.ClientSession(self.request,

1490

1206

gnutls.connection

1491

1207

.X509Credentials()))

1492

1208

1493

1209

# Note: gnutls.connection.X509Credentials is really a

1494

1210

# generic GnuTLS certificate credentials object so long as

1495

1211

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

1496

1212

# here despite using OpenPGP certificates.

1497

1213

1498

1214

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

1499

1215

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

1500

1216

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

1506

1222

(gnutls.library.functions

1507

1223

.gnutls_priority_set_direct(session._c_object,

1508

1224

priority, None))

1509

1225

1510

1226

# Start communication using the Mandos protocol

1511

1227

# Get protocol number

1512

1228

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

1517

1233

except (ValueError, IndexError, RuntimeError) as error:

1518

1234

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

1519

1235

return

1520

1236

1521

1237

# Start GnuTLS connection

1522

1238

try:

1523

1239

session.handshake()

1527

1243

# established. Just abandon the request.

1528

1244

return

1529

1245

logger.debug("Handshake succeeded")

1530

1246

1531

1247

approval_required = False

1532

1248

try:

1533

1249

try:

1538

1254

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

1539

1255

return

1540

1256

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

1541

1257

1542

1258

try:

1543

1259

client = ProxyClient(child_pipe, fpr,

1544

1260

self.client_address)

1556

1272

client.name)

1557

1273

if self.server.use_dbus:

1558

1274

# Emit D-Bus signal

1559

client.Rejected("Disabled")

1275

client.Rejected("Disabled")

1560

1276

return

1561

1277

1562

if client.approved or not client.approval_delay:

1278

if client._approved or not client.approval_delay:

1563

1279

#We are approved or approval is disabled

1564

1280

break

1565

elif client.approved is None:

1281

elif client._approved is None:

1566

1282

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

1567

1283

client.name)

1568

1284

if self.server.use_dbus:

1579

1295

return

1580

1296

1581

1297

#wait until timeout or approved

1298

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

1582

1299

time = datetime.datetime.now()

1583

1300

client.changedstate.acquire()

1584

(client.changedstate.wait

1585

(float(client.timedelta_to_milliseconds(delay)

1586

/ 1000)))

1301

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

1587

1302

client.changedstate.release()

1588

1303

time2 = datetime.datetime.now()

1589

1304

if (time2 - time) >= delay:

1611

1326

sent, len(client.secret)

1612

1327

- (sent_size + sent))

1613

1328

sent_size += sent

1614

1329

1615

1330

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

1616

# bump the timeout using extended_timeout

1617

client.bump_timeout(client.extended_timeout)

1331

# bump the timeout as if seen

1332

client.checked_ok()

1618

1333

if self.server.use_dbus:

1619

1334

# Emit D-Bus signal

1620

1335

client.GotSecret()

1687

1402

# Convert the buffer to a Python bytestring

1688

1403

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

1689

1404

# Convert the bytestring to hexadecimal notation

1690

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

1405

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

1691

1406

return hex_fpr

1692

1407

1693

1408

1696

1411

def sub_process_main(self, request, address):

1697

1412

try:

1698

1413

self.finish_request(request, address)

1699

except Exception:

1414

except:

1700

1415

self.handle_error(request, address)

1701

1416

self.close_request(request)

1702

1417

1703

1418

def process_request(self, request, address):

1704

1419

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

1705

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

1706

args = (request,

1707

address))

1708

proc.start()

1709

return proc

1710

1420

multiprocessing.Process(target = self.sub_process_main,

1421

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

1711

1422

1712

1423

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1713

1424

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

1717

1428

This function creates a new pipe in self.pipe

1718

1429

"""

1719

1430

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1720

1721

proc = MultiprocessingMixIn.process_request(self, request,

1722

client_address)

1431

1432

super(MultiprocessingMixInWithPipe,

1433

self).process_request(request, client_address)

1723

1434

self.child_pipe.close()

1724

self.add_pipe(parent_pipe, proc)

1725

1726

def add_pipe(self, parent_pipe, proc):

1435

self.add_pipe(parent_pipe)

1436

1437

def add_pipe(self, parent_pipe):

1727

1438

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

1728

1439

raise NotImplementedError

1729

1440

1730

1731

1441

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1732

1442

socketserver.TCPServer, object):

1733

1443

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

1807

1517

self.enabled = False

1808

1518

self.clients = clients

1809

1519

if self.clients is None:

1810

self.clients = {}

1520

self.clients = set()

1811

1521

self.use_dbus = use_dbus

1812

1522

self.gnutls_priority = gnutls_priority

1813

1523

IPv6_TCPServer.__init__(self, server_address,

1817

1527

def server_activate(self):

1818

1528

if self.enabled:

1819

1529

return socketserver.TCPServer.server_activate(self)

1820

1821

1530

def enable(self):

1822

1531

self.enabled = True

1823

1824

def add_pipe(self, parent_pipe, proc):

1532

def add_pipe(self, parent_pipe):

1825

1533

# Call "handle_ipc" for both data and EOF events

1826

1534

gobject.io_add_watch(parent_pipe.fileno(),

1827

1535

gobject.IO_IN | gobject.IO_HUP,

1828

1536

functools.partial(self.handle_ipc,

1829

parent_pipe =

1830

parent_pipe,

1831

proc = proc))

1832

1537

parent_pipe = parent_pipe))

1538

1833

1539

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

1834

proc = None, client_object=None):

1540

client_object=None):

1835

1541

condition_names = {

1836

1542

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

1837

1543

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

1846

1552

for cond, name in

1847

1553

condition_names.iteritems()

1848

1554

if cond & condition)

1849

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

1555

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

1850

1556

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

1851

# Wait for other process to exit

1852

proc.join()

1853

1557

return False

1854

1558

1855

1559

# Read a request from the child

1860

1564

fpr = request[1]

1861

1565

address = request[2]

1862

1566

1863

for c in self.clients.itervalues():

1567

for c in self.clients:

1864

1568

if c.fingerprint == fpr:

1865

1569

client = c

1866

1570

break

1869

1573

"dress: %s", fpr, address)

1870

1574

if self.use_dbus:

1871

1575

# Emit D-Bus signal

1872

mandos_dbus_service.ClientNotFound(fpr,

1873

address[0])

1576

mandos_dbus_service.ClientNotFound(fpr, address[0])

1874

1577

parent_pipe.send(False)

1875

1578

return False

1876

1579

1877

1580

gobject.io_add_watch(parent_pipe.fileno(),

1878

1581

gobject.IO_IN | gobject.IO_HUP,

1879

1582

functools.partial(self.handle_ipc,

1880

parent_pipe =

1881

parent_pipe,

1882

proc = proc,

1883

client_object =

1884

client))

1583

parent_pipe = parent_pipe,

1584

client_object = client))

1885

1585

parent_pipe.send(True)

1886

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

1887

# same fileno

1586

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

1888

1587

return False

1889

1588

if command == 'funcall':

1890

1589

funcname = request[1]

1891

1590

args = request[2]

1892

1591

kwargs = request[3]

1893

1592

1894

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

1895

funcname)(*args,

1896

**kwargs)))

1897

1593

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

1594

1898

1595

if command == 'getattr':

1899

1596

attrname = request[1]

1900

1597

if callable(client_object.__getattribute__(attrname)):

1901

1598

parent_pipe.send(('function',))

1902

1599

else:

1903

parent_pipe.send(('data', client_object

1904

.__getattribute__(attrname)))

1600

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

1905

1601

1906

1602

if command == 'setattr':

1907

1603

attrname = request[1]

1908

1604

value = request[2]

1909

1605

setattr(client_object, attrname, value)

1910

1606

1911

1607

return True

1912

1608

1913

1609

1950

1646

return timevalue

1951

1647

1952

1648

1649

def if_nametoindex(interface):

1650

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

1651

1652

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

1653

global if_nametoindex

1654

try:

1655

if_nametoindex = (ctypes.cdll.LoadLibrary

1656

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

1657

.if_nametoindex)

1658

except (OSError, AttributeError):

1659

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

1660

def if_nametoindex(interface):

1661

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

1662

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

1663

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

1664

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1665

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

1666

interface))

1667

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

1668

ifreq[16:20])[0]

1669

return interface_index

1670

return if_nametoindex(interface)

1671

1672

1953

1673

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

1954

1674

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

1955

1675

2010

1730

" system bus interface")

2011

1731

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

2012

1732

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

2013

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

2014

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

2015

" state")

2016

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

2017

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

2018

2019

1733

options = parser.parse_args()

2020

1734

2021

1735

if options.check:

2034

1748

"use_dbus": "True",

2035

1749

"use_ipv6": "True",

2036

1750

"debuglevel": "",

2037

"restore": "True",

2038

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

2039

1751

}

2040

1752

2041

1753

# Parse config file for server-global settings

2058

1770

# options, if set.

2059

1771

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

2060

1772

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

2061

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

2062

"statedir"):

1773

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

2063

1774

value = getattr(options, option)

2064

1775

if value is not None:

2065

1776

server_settings[option] = value

2077

1788

debuglevel = server_settings["debuglevel"]

2078

1789

use_dbus = server_settings["use_dbus"]

2079

1790

use_ipv6 = server_settings["use_ipv6"]

2080

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

2081

stored_state_file)

2082

2083

if debug:

2084

initlogger(debug, logging.DEBUG)

2085

else:

2086

if not debuglevel:

2087

initlogger(debug)

2088

else:

2089

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

2090

initlogger(debug, level)

2091

1791

2092

1792

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

2093

1793

syslogger.setFormatter(logging.Formatter

2094

1794

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

2096

1796

% server_settings["servicename"]))

2097

1797

2098

1798

# Parse config file with clients

2099

client_config = configparser.SafeConfigParser(Client

2100

.client_defaults)

1799

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

1800

"interval": "5m",

1801

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

1802

"host": "",

1803

"approval_delay": "0s",

1804

"approval_duration": "1s",

1805

}

1806

client_config = configparser.SafeConfigParser(client_defaults)

2101

1807

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

2102

1808

"clients.conf"))

2103

1809

2141

1847

if error[0] != errno.EPERM:

2142

1848

raise error

2143

1849

1850

if not debug and not debuglevel:

1851

syslogger.setLevel(logging.WARNING)

1852

console.setLevel(logging.WARNING)

1853

if debuglevel:

1854

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

1855

syslogger.setLevel(level)

1856

console.setLevel(level)

1857

2144

1858

if debug:

2145

1859

# Enable all possible GnuTLS debugging

2146

1860

2160

1874

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

2161

1875

if null > 2:

2162

1876

os.close(null)

1877

else:

1878

# No console logging

1879

logger.removeHandler(console)

2163

1880

2164

1881

# Need to fork before connecting to D-Bus

2165

1882

if not debug:

2166

1883

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

2167

1884

daemon()

2168

1885

2169

gobject.threads_init()

2170

2171

1886

global main_loop

2172

1887

# From the Avahi example code

2173

1888

DBusGMainLoop(set_as_default=True )

2176

1891

# End of Avahi example code

2177

1892

if use_dbus:

2178

1893

try:

2179

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

1894

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

2180

1895

bus, do_not_queue=True)

2181

old_bus_name = (dbus.service.BusName

2182

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

2183

do_not_queue=True))

2184

1896

except dbus.exceptions.NameExistsException as e:

2185

1897

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

2186

1898

use_dbus = False

2187

1899

server_settings["use_dbus"] = False

2188

1900

tcp_server.use_dbus = False

2189

1901

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2190

service = AvahiServiceToSyslog(name =

2191

server_settings["servicename"],

2192

servicetype = "_mandos._tcp",

2193

protocol = protocol, bus = bus)

1902

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

1903

servicetype = "_mandos._tcp",

1904

protocol = protocol, bus = bus)

2194

1905

if server_settings["interface"]:

2195

1906

service.interface = (if_nametoindex

2196

1907

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

2200

1911

2201

1912

client_class = Client

2202

1913

if use_dbus:

2203

client_class = functools.partial(ClientDBusTransitional,

2204

bus = bus)

2205

2206

client_settings = Client.config_parser(client_config)

2207

old_client_settings = {}

2208

clients_data = {}

2209

2210

# Get client data and settings from last running state.

2211

if server_settings["restore"]:

2212

try:

2213

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

2214

clients_data, old_client_settings = (pickle.load

2215

(stored_state))

2216

os.remove(stored_state_path)

2217

except IOError as e:

2218

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

2219

.format(e))

2220

if e.errno != errno.ENOENT:

2221

raise

2222

except EOFError as e:

2223

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

2224

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

2225

2226

with PGPEngine() as pgp:

2227

for client_name, client in clients_data.iteritems():

2228

# Decide which value to use after restoring saved state.

2229

# We have three different values: Old config file,

2230

# new config file, and saved state.

2231

# New config value takes precedence if it differs from old

2232

# config value, otherwise use saved state.

2233

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

2234

try:

2235

# For each value in new config, check if it

2236

# differs from the old config value (Except for

2237

# the "secret" attribute)

2238

if (name != "secret" and

2239

value != old_client_settings[client_name]

2240

[name]):

2241

client[name] = value

2242

except KeyError:

2243

pass

2244

2245

# Clients who has passed its expire date can still be

2246

# enabled if its last checker was successful. Clients

2247

# whose checker succeeded before we stored its state is

2248

# assumed to have successfully run all checkers during

2249

# downtime.

2250

if client["enabled"]:

2251

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

2252

if not client["last_checked_ok"]:

2253

logger.warning(

2254

"disabling client {0} - Client never "

2255

"performed a successful checker"

2256

.format(client_name))

2257

client["enabled"] = False

2258

elif client["last_checker_status"] != 0:

2259

logger.warning(

2260

"disabling client {0} - Client "

2261

"last checker failed with error code {1}"

2262

.format(client_name,

2263

client["last_checker_status"]))

2264

client["enabled"] = False

2265

else:

2266

client["expires"] = (datetime.datetime

2267

.utcnow()

2268

+ client["timeout"])

2269

logger.debug("Last checker succeeded,"

2270

" keeping {0} enabled"

2271

.format(client_name))

1914

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

1915

def client_config_items(config, section):

1916

special_settings = {

1917

"approved_by_default":

1918

lambda: config.getboolean(section,

1919

"approved_by_default"),

1920

}

1921

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

2272

1922

try:

2273

client["secret"] = (

2274

pgp.decrypt(client["encrypted_secret"],

2275

client_settings[client_name]

2276

["secret"]))

2277

except PGPError:

2278

# If decryption fails, we use secret from new settings

2279

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

2280

.format(client_name))

2281

client["secret"] = (

2282

client_settings[client_name]["secret"])

2283

2284

2285

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

2286

for client_name in (set(old_client_settings)

2287

- set(client_settings)):

2288

del clients_data[client_name]

2289

for client_name in (set(client_settings)

2290

- set(old_client_settings)):

2291

clients_data[client_name] = client_settings[client_name]

2292

2293

# Create all client objects

2294

for client_name, client in clients_data.iteritems():

2295

tcp_server.clients[client_name] = client_class(

2296

name = client_name, settings = client)

2297

1923

yield (name, special_settings[name]())

1924

except KeyError:

1925

yield (name, value)

1926

1927

tcp_server.clients.update(set(

1928

client_class(name = section,

1929

config= dict(client_config_items(

1930

client_config, section)))

1931

for section in client_config.sections()))

2298

1932

if not tcp_server.clients:

2299

1933

logger.warning("No clients defined")

2300

1934

2311

1945

# "pidfile" was never created

2312

1946

pass

2313

1947

del pidfilename

1948

2314

1949

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

2315

1950

2316

1951

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

2317

1952

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

2318

1953

2321

1956

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

2322

1957

def __init__(self):

2323

1958

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

2324

_interface = "se.recompile.Mandos"

1959

_interface = "se.bsnet.fukt.Mandos"

2325

1960

2326

1961

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

2327

1962

def ClientAdded(self, objpath):

2342

1977

def GetAllClients(self):

2343

1978

"D-Bus method"

2344

1979

return dbus.Array(c.dbus_object_path

2345

for c in

2346

tcp_server.clients.itervalues())

1980

for c in tcp_server.clients)

2347

1981

2348

1982

@dbus.service.method(_interface,

2349

1983

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

2351

1985

"D-Bus method"

2352

1986

return dbus.Dictionary(

2353

1987

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

2354

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

1988

for c in tcp_server.clients),

2355

1989

signature="oa{sv}")

2356

1990

2357

1991

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

2358

1992

def RemoveClient(self, object_path):

2359

1993

"D-Bus method"

2360

for c in tcp_server.clients.itervalues():

1994

for c in tcp_server.clients:

2361

1995

if c.dbus_object_path == object_path:

2362

del tcp_server.clients[c.name]

1996

tcp_server.clients.remove(c)

2363

1997

c.remove_from_connection()

2364

1998

# Don't signal anything except ClientRemoved

2365

1999

c.disable(quiet=True)

2370

2004

2371

2005

del _interface

2372

2006

2373

class MandosDBusServiceTransitional(MandosDBusService):

2374

__metaclass__ = AlternateDBusNamesMetaclass

2375

mandos_dbus_service = MandosDBusServiceTransitional()

2007

mandos_dbus_service = MandosDBusService()

2376

2008

2377

2009

def cleanup():

2378

2010

"Cleanup function; run on exit"

2379

2011

service.cleanup()

2380

2012

2381

multiprocessing.active_children()

2382

if not (tcp_server.clients or client_settings):

2383

return

2384

2385

# Store client before exiting. Secrets are encrypted with key

2386

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

2387

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

2388

clients = {}

2389

with PGPEngine() as pgp:

2390

for client in tcp_server.clients.itervalues():

2391

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

2392

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

2393

key)

2394

client_dict = {}

2395

2396

# A list of attributes that can not be pickled

2397

# + secret.

2398

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

2399

"checker"))

2400

for name, typ in (inspect.getmembers

2401

(dbus.service.Object)):

2402

exclude.add(name)

2403

2404

client_dict["encrypted_secret"] = (client

2405

.encrypted_secret)

2406

for attr in client.client_structure:

2407

if attr not in exclude:

2408

client_dict[attr] = getattr(client, attr)

2409

2410

clients[client.name] = client_dict

2411

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

2412

2413

try:

2414

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

2415

prefix="clients-",

2416

dir=os.path.dirname

2417

(stored_state_path))

2418

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

2419

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

2420

os.rename(tempname, stored_state_path)

2421

except (IOError, OSError) as e:

2422

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

2423

.format(e))

2424

if not debug:

2425

try:

2426

os.remove(tempname)

2427

except NameError:

2428

pass

2429

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

2430

errno.EEXIST)):

2431

raise e

2432

2433

# Delete all clients, and settings from config

2434

2013

while tcp_server.clients:

2435

name, client = tcp_server.clients.popitem()

2014

client = tcp_server.clients.pop()

2436

2015

if use_dbus:

2437

2016

client.remove_from_connection()

2017

client.disable_hook = None

2438

2018

# Don't signal anything except ClientRemoved

2439

2019

client.disable(quiet=True)

2440

2020

if use_dbus:

2441

2021

# Emit D-Bus signal

2442

mandos_dbus_service.ClientRemoved(client

2443

.dbus_object_path,

2022

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2444

2023

client.name)

2445

client_settings.clear()

2446

2024

2447

2025

atexit.register(cleanup)

2448

2026

2449

for client in tcp_server.clients.itervalues():

2027

for client in tcp_server.clients:

2450

2028

if use_dbus:

2451

2029

# Emit D-Bus signal

2452

2030

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2453

# Need to initiate checking of clients

2454

if client.enabled:

2455

client.init_checker()

2031

client.enable()

2456

2032

2457

2033

tcp_server.enable()

2458

2034

tcp_server.server_activate()