/mandos/trunk : revision 24.1.180

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

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disabled, or None

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"""

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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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return self._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.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 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

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(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)

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

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client["extended_timeout"] = string_to_delta(

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section["extended_timeout"])

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

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client["approval_delay"] = string_to_delta(

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section["approval_delay"])

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client["approval_duration"] = string_to_delta(

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section["approval_duration"])

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

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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):

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return self._timedelta_to_milliseconds(self.approval_delay)

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

510

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

511

335

'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

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338

if config is None:

339

config = {}

528

340

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

529

341

# Uppercase and remove spaces from fingerprint for later

530

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# comparison purposes with return value from the fingerprint()

531

343

# function

344

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

345

.replace(" ", ""))

532

346

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

533

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

534

datetime.datetime.utcnow())

535

536

# attributes specific for this server instance

347

if "secret" in config:

348

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

349

elif "secfile" in config:

350

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

351

(config["secfile"])),

352

"rb") as secfile:

353

self.secret = secfile.read()

354

else:

355

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

356

% self.name)

357

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

358

self.created = datetime.datetime.utcnow()

359

self.enabled = False

360

self.last_approval_request = None

361

self.last_enabled = None

362

self.last_checked_ok = None

363

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

364

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

365

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

366

self.disable_hook = disable_hook

537

367

self.checker = None

538

368

self.checker_initiator_tag = None

539

369

self.disable_initiator_tag = None

370

self.expires = None

540

371

self.checker_callback_tag = None

372

self.checker_command = config["checker"]

541

373

self.current_checker_command = None

542

self.approved = None

374

self.last_connect = None

375

self._approved = None

376

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

377

True)

543

378

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)

379

self.approval_delay = string_to_delta(

380

config["approval_delay"])

381

self.approval_duration = string_to_delta(

382

config["approval_duration"])

383

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

558

384

559

# Send notice to process children that client state has changed

560

385

def send_changedstate(self):

561

with self.changedstate:

562

self.changedstate.notify_all()

563

386

self.changedstate.acquire()

387

self.changedstate.notify_all()

388

self.changedstate.release()

389

564

390

def enable(self):

565

391

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

566

392

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

567

393

# Already enabled

568

394

return

569

395

self.send_changedstate()

396

self.last_enabled = datetime.datetime.utcnow()

397

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

398

# and every interval from then on.

399

self.checker_initiator_tag = (gobject.timeout_add

400

(self.interval_milliseconds(),

401

self.start_checker))

402

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

570

403

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

404

self.disable_initiator_tag = (gobject.timeout_add

405

(self.timeout_milliseconds(),

406

self.disable))

571

407

self.enabled = True

572

self.last_enabled = datetime.datetime.utcnow()

573

self.init_checker()

408

# Also start a new checker *right now*.

409

self.start_checker()

574

410

575

411

def disable(self, quiet=True):

576

412

"""Disable this client."""

588

424

gobject.source_remove(self.checker_initiator_tag)

589

425

self.checker_initiator_tag = None

590

426

self.stop_checker()

427

if self.disable_hook:

428

self.disable_hook(self)

591

429

self.enabled = False

592

430

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

593

431

return False

594

432

595

433

def __del__(self):

434

self.disable_hook = None

596

435

self.disable()

597

436

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

437

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

612

438

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

613

439

self.checker_callback_tag = None

614

440

self.checker = None

615

441

if os.WIFEXITED(condition):

616

self.last_checker_status = os.WEXITSTATUS(condition)

617

if self.last_checker_status == 0:

442

exitstatus = os.WEXITSTATUS(condition)

443

if exitstatus == 0:

618

444

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

619

445

vars(self))

620

446

self.checked_ok()

622

448

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

623

449

vars(self))

624

450

else:

625

self.last_checker_status = -1

626

451

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

627

452

vars(self))

628

453

629

def checked_ok(self):

630

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

631

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."""

454

def checked_ok(self, timeout=None):

455

"""Bump up the timeout for this client.

456

457

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

458

alive and well.

459

"""

637

460

if timeout is None:

638

461

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

462

self.last_checked_ok = datetime.datetime.utcnow()

463

gobject.source_remove(self.disable_initiator_tag)

464

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

465

self.disable_initiator_tag = (gobject.timeout_add

466

(self._timedelta_to_milliseconds(timeout),

467

self.disable))

646

468

647

469

def need_approval(self):

648

470

self.last_approval_request = datetime.datetime.utcnow()

688

510

'replace')))

689

511

for attr in

690

512

self.runtime_expansions)

691

513

692

514

try:

693

515

command = self.checker_command % escaped_attrs

694

516

except TypeError as error:

740

562

raise

741

563

self.checker = None

742

564

743

744

565

def dbus_service_property(dbus_interface, signature="v",

745

566

access="readwrite", byte_arrays=False):

746

567

"""Decorators for marking methods of a DBusObjectWithProperties to

792

613

793

614

class DBusObjectWithProperties(dbus.service.Object):

794

615

"""A D-Bus object with properties.

795

616

796

617

Classes inheriting from this can use the dbus_service_property

797

618

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

798

619

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

805

626

def _get_all_dbus_properties(self):

806

627

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

807

628

"""

808

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

809

for cls in self.__class__.__mro__

629

return ((prop._dbus_name, prop)

810

630

for name, prop in

811

inspect.getmembers(cls, self._is_dbus_property))

631

inspect.getmembers(self, self._is_dbus_property))

812

632

813

633

def _get_dbus_property(self, interface_name, property_name):

814

634

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

815

635

property with the specified name and interface.

816

636

"""

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

637

for name in (property_name,

638

property_name + "_dbus_property"):

639

prop = getattr(self, name, None)

640

if (prop is None

641

or not self._is_dbus_property(prop)

642

or prop._dbus_name != property_name

643

or (interface_name and prop._dbus_interface

644

and interface_name != prop._dbus_interface)):

645

continue

646

return prop

824

647

# No such property

825

648

raise DBusPropertyNotFound(self.dbus_object_path + ":"

826

649

+ interface_name + "."

851

674

# signatures other than "ay".

852

675

if prop._dbus_signature != "ay":

853

676

raise ValueError

854

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

855

for byte in value))

677

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

678

for byte in value))

856

679

prop(value)

857

680

858

681

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

860

683

def GetAll(self, interface_name):

861

684

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

862

685

standard.

863

686

864

687

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

865

688

"""

866

properties = {}

689

all = {}

867

690

for name, prop in self._get_all_dbus_properties():

868

691

if (interface_name

869

692

and interface_name != prop._dbus_interface):

874

697

continue

875

698

value = prop()

876

699

if not hasattr(value, "variant_level"):

877

properties[name] = value

700

all[name] = value

878

701

continue

879

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

880

value.variant_level+1)

881

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

702

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

703

value.variant_level+1)

704

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

882

705

883

706

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

884

707

out_signature="s",

928

751

return xmlstring

929

752

930

753

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

754

class ClientDBus(Client, DBusObjectWithProperties):

1038

755

"""A Client class using D-Bus

1039

756

1048

765

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

1049

766

1050

767

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

768

self._approvals_pending = 0

1051

769

self.bus = bus

1052

770

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

1053

771

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

1059

777

("/clients/" + client_object_name))

1060

778

DBusObjectWithProperties.__init__(self, self.bus,

1061

779

self.dbus_object_path)

1062

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

780

def _set_expires(self, value):

781

old_value = getattr(self, "_expires", None)

782

self._expires = value

783

if hasattr(self, "dbus_object_path") and old_value != value:

784

dbus_time = (self._datetime_to_dbus(self._expires,

785

variant_level=1))

786

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

787

dbus_time)

788

expires = property(lambda self: self._expires, _set_expires)

789

del _set_expires

790

791

def _get_approvals_pending(self):

792

return self._approvals_pending

793

def _set_approvals_pending(self, value):

794

old_value = self._approvals_pending

795

self._approvals_pending = value

796

bval = bool(value)

797

if (hasattr(self, "dbus_object_path")

798

and bval is not bool(old_value)):

799

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

800

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

801

dbus_bool)

802

803

approvals_pending = property(_get_approvals_pending,

804

_set_approvals_pending)

805

del _get_approvals_pending, _set_approvals_pending

806

807

@staticmethod

808

def _datetime_to_dbus(dt, variant_level=0):

809

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

810

if dt is None:

811

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

812

return dbus.String(dt.isoformat(),

813

variant_level=variant_level)

814

815

def enable(self):

816

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

817

r = Client.enable(self)

818

if oldstate != self.enabled:

819

# Emit D-Bus signals

820

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

821

dbus.Boolean(True, variant_level=1))

822

self.PropertyChanged(

823

dbus.String("LastEnabled"),

824

self._datetime_to_dbus(self.last_enabled,

825

variant_level=1))

826

return r

827

828

def disable(self, quiet = False):

829

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

830

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

831

if not quiet and oldstate != self.enabled:

832

# Emit D-Bus signal

833

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

834

dbus.Boolean(False, variant_level=1))

835

return r

1131

836

1132

837

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

1133

838

try:

1142

847

*args, **kwargs):

1143

848

self.checker_callback_tag = None

1144

849

self.checker = None

850

# Emit D-Bus signal

851

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

852

dbus.Boolean(False, variant_level=1))

1145

853

if os.WIFEXITED(condition):

1146

854

exitstatus = os.WEXITSTATUS(condition)

1147

855

# Emit D-Bus signal

1157

865

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

1158

866

*args, **kwargs)

1159

867

868

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

869

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

870

# Emit D-Bus signal

871

self.PropertyChanged(

872

dbus.String("LastCheckedOK"),

873

(self._datetime_to_dbus(self.last_checked_ok,

874

variant_level=1)))

875

876

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

877

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

878

# Emit D-Bus signal

879

self.PropertyChanged(

880

dbus.String("LastApprovalRequest"),

881

(self._datetime_to_dbus(self.last_approval_request,

882

variant_level=1)))

883

return r

884

1160

885

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

1161

886

old_checker = self.checker

1162

887

if self.checker is not None:

1169

894

and old_checker_pid != self.checker.pid):

1170

895

# Emit D-Bus signal

1171

896

self.CheckerStarted(self.current_checker_command)

897

self.PropertyChanged(

898

dbus.String("CheckerRunning"),

899

dbus.Boolean(True, variant_level=1))

1172

900

return r

1173

901

902

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

903

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

904

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

905

if (old_checker is not None

906

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

907

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

908

dbus.Boolean(False, variant_level=1))

909

return r

910

1174

911

def _reset_approved(self):

1175

self.approved = None

912

self._approved = None

1176

913

return False

1177

914

1178

915

def approve(self, value=True):

1179

916

self.send_changedstate()

1180

self.approved = value

1181

gobject.timeout_add(timedelta_to_milliseconds

917

self._approved = value

918

gobject.timeout_add(self._timedelta_to_milliseconds

1182

919

(self.approval_duration),

1183

920

self._reset_approved)

1184

921

1185

922

1186

923

## D-Bus methods, signals & properties

1187

_interface = "se.recompile.Mandos.Client"

924

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

1188

925

1189

926

## Signals

1190

927

1275

1012

def ApprovedByDefault_dbus_property(self, value=None):

1276

1013

if value is None: # get

1277

1014

return dbus.Boolean(self.approved_by_default)

1015

old_value = self.approved_by_default

1278

1016

self.approved_by_default = bool(value)

1017

# Emit D-Bus signal

1018

if old_value != self.approved_by_default:

1019

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

1020

dbus.Boolean(value, variant_level=1))

1279

1021

1280

1022

# ApprovalDelay - property

1281

1023

@dbus_service_property(_interface, signature="t",

1283

1025

def ApprovalDelay_dbus_property(self, value=None):

1284

1026

if value is None: # get

1285

1027

return dbus.UInt64(self.approval_delay_milliseconds())

1028

old_value = self.approval_delay

1286

1029

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

1030

# Emit D-Bus signal

1031

if old_value != self.approval_delay:

1032

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

1033

dbus.UInt64(value, variant_level=1))

1287

1034

1288

1035

# ApprovalDuration - property

1289

1036

@dbus_service_property(_interface, signature="t",

1290

1037

access="readwrite")

1291

1038

def ApprovalDuration_dbus_property(self, value=None):

1292

1039

if value is None: # get

1293

return dbus.UInt64(timedelta_to_milliseconds(

1040

return dbus.UInt64(self._timedelta_to_milliseconds(

1294

1041

self.approval_duration))

1042

old_value = self.approval_duration

1295

1043

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

1044

# Emit D-Bus signal

1045

if old_value != self.approval_duration:

1046

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

1047

dbus.UInt64(value, variant_level=1))

1296

1048

1297

1049

# Name - property

1298

1050

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

1310

1062

def Host_dbus_property(self, value=None):

1311

1063

if value is None: # get

1312

1064

return dbus.String(self.host)

1313

self.host = unicode(value)

1065

old_value = self.host

1066

self.host = value

1067

# Emit D-Bus signal

1068

if old_value != self.host:

1069

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

1070

dbus.String(value, variant_level=1))

1314

1071

1315

1072

# Created - property

1316

1073

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

1317

1074

def Created_dbus_property(self):

1318

return datetime_to_dbus(self.created)

1075

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

1319

1076

1320

1077

# LastEnabled - property

1321

1078

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

1322

1079

def LastEnabled_dbus_property(self):

1323

return datetime_to_dbus(self.last_enabled)

1080

return self._datetime_to_dbus(self.last_enabled)

1324

1081

1325

1082

# Enabled - property

1326

1083

@dbus_service_property(_interface, signature="b",

1340

1097

if value is not None:

1341

1098

self.checked_ok()

1342

1099

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)

1100

return self._datetime_to_dbus(self.last_checked_ok)

1350

1101

1351

1102

# Expires - property

1352

1103

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

1353

1104

def Expires_dbus_property(self):

1354

return datetime_to_dbus(self.expires)

1105

return self._datetime_to_dbus(self.expires)

1355

1106

1356

1107

# LastApprovalRequest - property

1357

1108

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

1358

1109

def LastApprovalRequest_dbus_property(self):

1359

return datetime_to_dbus(self.last_approval_request)

1110

return self._datetime_to_dbus(self.last_approval_request)

1360

1111

1361

1112

# Timeout - property

1362

1113

@dbus_service_property(_interface, signature="t",

1364

1115

def Timeout_dbus_property(self, value=None):

1365

1116

if value is None: # get

1366

1117

return dbus.UInt64(self.timeout_milliseconds())

1118

old_value = self.timeout

1367

1119

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

1120

# Emit D-Bus signal

1121

if old_value != self.timeout:

1122

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

1123

dbus.UInt64(value, variant_level=1))

1124

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

1125

return

1368

1126

# 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

1127

gobject.source_remove(self.disable_initiator_tag)

1128

self.disable_initiator_tag = None

1129

self.expires = None

1130

time_to_die = (self.

1131

_timedelta_to_milliseconds((self

1132

.last_checked_ok

1133

+ self.timeout)

1134

- datetime.datetime

1135

.utcnow()))

1136

if time_to_die <= 0:

1137

# The timeout has passed

1138

self.disable()

1139

else:

1140

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

1141

+ datetime.timedelta(milliseconds = time_to_die))

1142

self.disable_initiator_tag = (gobject.timeout_add

1143

(time_to_die, self.disable))

1144

1388

1145

# ExtendedTimeout - property

1389

1146

@dbus_service_property(_interface, signature="t",

1390

1147

access="readwrite")

1391

1148

def ExtendedTimeout_dbus_property(self, value=None):

1392

1149

if value is None: # get

1393

1150

return dbus.UInt64(self.extended_timeout_milliseconds())

1151

old_value = self.extended_timeout

1394

1152

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

1395

1153

# Emit D-Bus signal

1154

if old_value != self.extended_timeout:

1155

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

1156

dbus.UInt64(value, variant_level=1))

1157

1396

1158

# Interval - property

1397

1159

@dbus_service_property(_interface, signature="t",

1398

1160

access="readwrite")

1399

1161

def Interval_dbus_property(self, value=None):

1400

1162

if value is None: # get

1401

1163

return dbus.UInt64(self.interval_milliseconds())

1164

old_value = self.interval

1402

1165

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

1166

# Emit D-Bus signal

1167

if old_value != self.interval:

1168

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

1169

dbus.UInt64(value, variant_level=1))

1403

1170

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

1404

1171

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

1172

# Reschedule checker run

1173

gobject.source_remove(self.checker_initiator_tag)

1174

self.checker_initiator_tag = (gobject.timeout_add

1175

(value, self.start_checker))

1176

self.start_checker() # Start one now, too

1177

1412

1178

# Checker - property

1413

1179

@dbus_service_property(_interface, signature="s",

1414

1180

access="readwrite")

1415

1181

def Checker_dbus_property(self, value=None):

1416

1182

if value is None: # get

1417

1183

return dbus.String(self.checker_command)

1418

self.checker_command = unicode(value)

1184

old_value = self.checker_command

1185

self.checker_command = value

1186

# Emit D-Bus signal

1187

if old_value != self.checker_command:

1188

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

1189

dbus.String(self.checker_command,

1190

variant_level=1))

1419

1191

1420

1192

# CheckerRunning - property

1421

1193

@dbus_service_property(_interface, signature="b",

1448

1220

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

1449

1221

if not self._pipe.recv():

1450

1222

raise KeyError()

1451

1223

1452

1224

def __getattribute__(self, name):

1453

if name == '_pipe':

1225

if(name == '_pipe'):

1454

1226

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

1455

1227

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

1456

1228

data = self._pipe.recv()

1461

1233

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

1462

1234

return self._pipe.recv()[1]

1463

1235

return func

1464

1236

1465

1237

def __setattr__(self, name, value):

1466

if name == '_pipe':

1238

if(name == '_pipe'):

1467

1239

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

1468

1240

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

1469

1241

1470

1242

1471

class ClientDBusTransitional(ClientDBus):

1472

__metaclass__ = AlternateDBusNamesMetaclass

1473

1474

1475

1243

class ClientHandler(socketserver.BaseRequestHandler, object):

1476

1244

"""A class to handle client connections.

1477

1245

1484

1252

unicode(self.client_address))

1485

1253

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

1486

1254

self.server.child_pipe.fileno())

1487

1255

1488

1256

session = (gnutls.connection

1489

1257

.ClientSession(self.request,

1490

1258

gnutls.connection

1491

1259

.X509Credentials()))

1492

1260

1493

1261

# Note: gnutls.connection.X509Credentials is really a

1494

1262

# generic GnuTLS certificate credentials object so long as

1495

1263

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

1496

1264

# here despite using OpenPGP certificates.

1497

1265

1498

1266

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

1499

1267

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

1500

1268

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

1506

1274

(gnutls.library.functions

1507

1275

.gnutls_priority_set_direct(session._c_object,

1508

1276

priority, None))

1509

1277

1510

1278

# Start communication using the Mandos protocol

1511

1279

# Get protocol number

1512

1280

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

1517

1285

except (ValueError, IndexError, RuntimeError) as error:

1518

1286

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

1519

1287

return

1520

1288

1521

1289

# Start GnuTLS connection

1522

1290

try:

1523

1291

session.handshake()

1527

1295

# established. Just abandon the request.

1528

1296

return

1529

1297

logger.debug("Handshake succeeded")

1530

1298

1531

1299

approval_required = False

1532

1300

try:

1533

1301

try:

1538

1306

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

1539

1307

return

1540

1308

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

1541

1309

1542

1310

try:

1543

1311

client = ProxyClient(child_pipe, fpr,

1544

1312

self.client_address)

1556

1324

client.name)

1557

1325

if self.server.use_dbus:

1558

1326

# Emit D-Bus signal

1559

client.Rejected("Disabled")

1327

client.Rejected("Disabled")

1560

1328

return

1561

1329

1562

if client.approved or not client.approval_delay:

1330

if client._approved or not client.approval_delay:

1563

1331

#We are approved or approval is disabled

1564

1332

break

1565

elif client.approved is None:

1333

elif client._approved is None:

1566

1334

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

1567

1335

client.name)

1568

1336

if self.server.use_dbus:

1579

1347

return

1580

1348

1581

1349

#wait until timeout or approved

1350

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

1582

1351

time = datetime.datetime.now()

1583

1352

client.changedstate.acquire()

1584

(client.changedstate.wait

1585

(float(client.timedelta_to_milliseconds(delay)

1586

/ 1000)))

1353

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

1587

1354

client.changedstate.release()

1588

1355

time2 = datetime.datetime.now()

1589

1356

if (time2 - time) >= delay:

1611

1378

sent, len(client.secret)

1612

1379

- (sent_size + sent))

1613

1380

sent_size += sent

1614

1381

1615

1382

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

1616

# bump the timeout using extended_timeout

1617

client.bump_timeout(client.extended_timeout)

1383

# bump the timeout as if seen

1384

client.checked_ok(client.extended_timeout)

1618

1385

if self.server.use_dbus:

1619

1386

# Emit D-Bus signal

1620

1387

client.GotSecret()

1687

1454

# Convert the buffer to a Python bytestring

1688

1455

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

1689

1456

# Convert the bytestring to hexadecimal notation

1690

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

1457

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

1691

1458

return hex_fpr

1692

1459

1693

1460

1696

1463

def sub_process_main(self, request, address):

1697

1464

try:

1698

1465

self.finish_request(request, address)

1699

except Exception:

1466

except:

1700

1467

self.handle_error(request, address)

1701

1468

self.close_request(request)

1702

1469

1703

1470

def process_request(self, request, address):

1704

1471

"""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

1472

multiprocessing.Process(target = self.sub_process_main,

1473

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

1711

1474

1712

1475

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1713

1476

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

1717

1480

This function creates a new pipe in self.pipe

1718

1481

"""

1719

1482

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1720

1721

proc = MultiprocessingMixIn.process_request(self, request,

1722

client_address)

1483

1484

super(MultiprocessingMixInWithPipe,

1485

self).process_request(request, client_address)

1723

1486

self.child_pipe.close()

1724

self.add_pipe(parent_pipe, proc)

1725

1726

def add_pipe(self, parent_pipe, proc):

1487

self.add_pipe(parent_pipe)

1488

1489

def add_pipe(self, parent_pipe):

1727

1490

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

1728

1491

raise NotImplementedError

1729

1492

1730

1731

1493

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1732

1494

socketserver.TCPServer, object):

1733

1495

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

1807

1569

self.enabled = False

1808

1570

self.clients = clients

1809

1571

if self.clients is None:

1810

self.clients = {}

1572

self.clients = set()

1811

1573

self.use_dbus = use_dbus

1812

1574

self.gnutls_priority = gnutls_priority

1813

1575

IPv6_TCPServer.__init__(self, server_address,

1817

1579

def server_activate(self):

1818

1580

if self.enabled:

1819

1581

return socketserver.TCPServer.server_activate(self)

1820

1821

1582

def enable(self):

1822

1583

self.enabled = True

1823

1824

def add_pipe(self, parent_pipe, proc):

1584

def add_pipe(self, parent_pipe):

1825

1585

# Call "handle_ipc" for both data and EOF events

1826

1586

gobject.io_add_watch(parent_pipe.fileno(),

1827

1587

gobject.IO_IN | gobject.IO_HUP,

1828

1588

functools.partial(self.handle_ipc,

1829

parent_pipe =

1830

parent_pipe,

1831

proc = proc))

1832

1589

parent_pipe = parent_pipe))

1590

1833

1591

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

1834

proc = None, client_object=None):

1592

client_object=None):

1835

1593

condition_names = {

1836

1594

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

1837

1595

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

1846

1604

for cond, name in

1847

1605

condition_names.iteritems()

1848

1606

if cond & condition)

1849

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

1607

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

1850

1608

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

1851

# Wait for other process to exit

1852

proc.join()

1853

1609

return False

1854

1610

1855

1611

# Read a request from the child

1860

1616

fpr = request[1]

1861

1617

address = request[2]

1862

1618

1863

for c in self.clients.itervalues():

1619

for c in self.clients:

1864

1620

if c.fingerprint == fpr:

1865

1621

client = c

1866

1622

break

1869

1625

"dress: %s", fpr, address)

1870

1626

if self.use_dbus:

1871

1627

# Emit D-Bus signal

1872

mandos_dbus_service.ClientNotFound(fpr,

1873

address[0])

1628

mandos_dbus_service.ClientNotFound(fpr, address[0])

1874

1629

parent_pipe.send(False)

1875

1630

return False

1876

1631

1877

1632

gobject.io_add_watch(parent_pipe.fileno(),

1878

1633

gobject.IO_IN | gobject.IO_HUP,

1879

1634

functools.partial(self.handle_ipc,

1880

parent_pipe =

1881

parent_pipe,

1882

proc = proc,

1883

client_object =

1884

client))

1635

parent_pipe = parent_pipe,

1636

client_object = client))

1885

1637

parent_pipe.send(True)

1886

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

1887

# same fileno

1638

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

1888

1639

return False

1889

1640

if command == 'funcall':

1890

1641

funcname = request[1]

1891

1642

args = request[2]

1892

1643

kwargs = request[3]

1893

1644

1894

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

1895

funcname)(*args,

1896

**kwargs)))

1897

1645

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

1646

1898

1647

if command == 'getattr':

1899

1648

attrname = request[1]

1900

1649

if callable(client_object.__getattribute__(attrname)):

1901

1650

parent_pipe.send(('function',))

1902

1651

else:

1903

parent_pipe.send(('data', client_object

1904

.__getattribute__(attrname)))

1652

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

1905

1653

1906

1654

if command == 'setattr':

1907

1655

attrname = request[1]

1908

1656

value = request[2]

1909

1657

setattr(client_object, attrname, value)

1910

1658

1911

1659

return True

1912

1660

1913

1661

1950

1698

return timevalue

1951

1699

1952

1700

1701

def if_nametoindex(interface):

1702

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

1703

1704

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

1705

global if_nametoindex

1706

try:

1707

if_nametoindex = (ctypes.cdll.LoadLibrary

1708

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

1709

.if_nametoindex)

1710

except (OSError, AttributeError):

1711

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

1712

def if_nametoindex(interface):

1713

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

1714

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

1715

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

1716

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1717

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

1718

interface))

1719

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

1720

ifreq[16:20])[0]

1721

return interface_index

1722

return if_nametoindex(interface)

1723

1724

1953

1725

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

1954

1726

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

1955

1727

2010

1782

" system bus interface")

2011

1783

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

2012

1784

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

1785

options = parser.parse_args()

2020

1786

2021

1787

if options.check:

2034

1800

"use_dbus": "True",

2035

1801

"use_ipv6": "True",

2036

1802

"debuglevel": "",

2037

"restore": "True",

2038

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

2039

1803

}

2040

1804

2041

1805

# Parse config file for server-global settings

2058

1822

# options, if set.

2059

1823

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

2060

1824

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

2061

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

2062

"statedir"):

1825

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

2063

1826

value = getattr(options, option)

2064

1827

if value is not None:

2065

1828

server_settings[option] = value

2077

1840

debuglevel = server_settings["debuglevel"]

2078

1841

use_dbus = server_settings["use_dbus"]

2079

1842

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

1843

2092

1844

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

2093

1845

syslogger.setFormatter(logging.Formatter

2094

1846

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

2096

1848

% server_settings["servicename"]))

2097

1849

2098

1850

# Parse config file with clients

2099

client_config = configparser.SafeConfigParser(Client

2100

.client_defaults)

1851

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

1852

"extended_timeout": "15m",

1853

"interval": "2m",

1854

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

1855

"host": "",

1856

"approval_delay": "0s",

1857

"approval_duration": "1s",

1858

}

1859

client_config = configparser.SafeConfigParser(client_defaults)

2101

1860

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

2102

1861

"clients.conf"))

2103

1862

2141

1900

if error[0] != errno.EPERM:

2142

1901

raise error

2143

1902

1903

if not debug and not debuglevel:

1904

syslogger.setLevel(logging.WARNING)

1905

console.setLevel(logging.WARNING)

1906

if debuglevel:

1907

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

1908

syslogger.setLevel(level)

1909

console.setLevel(level)

1910

2144

1911

if debug:

2145

1912

# Enable all possible GnuTLS debugging

2146

1913

2160

1927

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

2161

1928

if null > 2:

2162

1929

os.close(null)

1930

else:

1931

# No console logging

1932

logger.removeHandler(console)

2163

1933

2164

1934

# Need to fork before connecting to D-Bus

2165

1935

if not debug:

2166

1936

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

2167

1937

daemon()

2168

1938

2169

gobject.threads_init()

2170

2171

1939

global main_loop

2172

1940

# From the Avahi example code

2173

1941

DBusGMainLoop(set_as_default=True )

2176

1944

# End of Avahi example code

2177

1945

if use_dbus:

2178

1946

try:

2179

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

1947

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

2180

1948

bus, do_not_queue=True)

2181

old_bus_name = (dbus.service.BusName

2182

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

2183

do_not_queue=True))

2184

1949

except dbus.exceptions.NameExistsException as e:

2185

1950

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

2186

1951

use_dbus = False

2187

1952

server_settings["use_dbus"] = False

2188

1953

tcp_server.use_dbus = False

2189

1954

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)

1955

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

1956

servicetype = "_mandos._tcp",

1957

protocol = protocol, bus = bus)

2194

1958

if server_settings["interface"]:

2195

1959

service.interface = (if_nametoindex

2196

1960

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

2200

1964

2201

1965

client_class = Client

2202

1966

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))

1967

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

1968

def client_config_items(config, section):

1969

special_settings = {

1970

"approved_by_default":

1971

lambda: config.getboolean(section,

1972

"approved_by_default"),

1973

}

1974

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

2272

1975

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

1976

yield (name, special_settings[name]())

1977

except KeyError:

1978

yield (name, value)

1979

1980

tcp_server.clients.update(set(

1981

client_class(name = section,

1982

config= dict(client_config_items(

1983

client_config, section)))

1984

for section in client_config.sections()))

2298

1985

if not tcp_server.clients:

2299

1986

logger.warning("No clients defined")

2300

1987

2311

1998

# "pidfile" was never created

2312

1999

pass

2313

2000

del pidfilename

2001

2314

2002

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

2315

2003

2316

2004

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

2317

2005

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

2318

2006

2321

2009

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

2322

2010

def __init__(self):

2323

2011

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

2324

_interface = "se.recompile.Mandos"

2012

_interface = "se.bsnet.fukt.Mandos"

2325

2013

2326

2014

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

2327

2015

def ClientAdded(self, objpath):

2342

2030

def GetAllClients(self):

2343

2031

"D-Bus method"

2344

2032

return dbus.Array(c.dbus_object_path

2345

for c in

2346

tcp_server.clients.itervalues())

2033

for c in tcp_server.clients)

2347

2034

2348

2035

@dbus.service.method(_interface,

2349

2036

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

2351

2038

"D-Bus method"

2352

2039

return dbus.Dictionary(

2353

2040

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

2354

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

2041

for c in tcp_server.clients),

2355

2042

signature="oa{sv}")

2356

2043

2357

2044

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

2358

2045

def RemoveClient(self, object_path):

2359

2046

"D-Bus method"

2360

for c in tcp_server.clients.itervalues():

2047

for c in tcp_server.clients:

2361

2048

if c.dbus_object_path == object_path:

2362

del tcp_server.clients[c.name]

2049

tcp_server.clients.remove(c)

2363

2050

c.remove_from_connection()

2364

2051

# Don't signal anything except ClientRemoved

2365

2052

c.disable(quiet=True)

2370

2057

2371

2058

del _interface

2372

2059

2373

class MandosDBusServiceTransitional(MandosDBusService):

2374

__metaclass__ = AlternateDBusNamesMetaclass

2375

mandos_dbus_service = MandosDBusServiceTransitional()

2060

mandos_dbus_service = MandosDBusService()

2376

2061

2377

2062

def cleanup():

2378

2063

"Cleanup function; run on exit"

2379

2064

service.cleanup()

2380

2065

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

2066

while tcp_server.clients:

2435

name, client = tcp_server.clients.popitem()

2067

client = tcp_server.clients.pop()

2436

2068

if use_dbus:

2437

2069

client.remove_from_connection()

2070

client.disable_hook = None

2438

2071

# Don't signal anything except ClientRemoved

2439

2072

client.disable(quiet=True)

2440

2073

if use_dbus:

2441

2074

# Emit D-Bus signal

2442

mandos_dbus_service.ClientRemoved(client

2443

.dbus_object_path,

2075

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2444

2076

client.name)

2445

client_settings.clear()

2446

2077

2447

2078

atexit.register(cleanup)

2448

2079

2449

for client in tcp_server.clients.itervalues():

2080

for client in tcp_server.clients:

2450

2081

if use_dbus:

2451

2082

# Emit D-Bus signal

2452

2083

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2453

# Need to initiate checking of clients

2454

if client.enabled:

2455

client.init_checker()

2084

client.enable()

2456

2085

2457

2086

tcp_server.enable()

2458

2087

tcp_server.server_activate()