/mandos/trunk : revision 502.1.1

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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 = "1.5.2"

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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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def _timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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

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Attributes:

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

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

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

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

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

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

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checker_initiator_tag: a gobject event source tag, or None

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

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client_structure: Object describing what attributes a client has

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and is used for storing the client at exit

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current_checker_command: string; current running checker_command

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

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disable_initiator_tag: a gobject event source tag, or None

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enabled: bool()

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

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

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

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

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last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, -2 means no checker completed yet.

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

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last_enabled: datetime.datetime(); (UTC)

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

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D-Bus identifiers

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

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

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until this client is disabled

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extended_timeout: extra long timeout when secret has been sent

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extended_timeout: extra long timeout when password has been sent

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runtime_expansions: Allowed attributes for runtime expansion.

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

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disabled, or None

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

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

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

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

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"extended_timeout": "15m",

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"interval": "2m",

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

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"host": "",

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"approval_delay": "0s",

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"approval_duration": "1s",

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"approved_by_default": "True",

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"enabled": "True",

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}

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def timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.timeout)

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return _timedelta_to_milliseconds(self.timeout)

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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.extended_timeout)

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return _timedelta_to_milliseconds(self.extended_timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return timedelta_to_milliseconds(self.interval)

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return _timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

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return timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

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def config_parser(config):

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

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

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with exceptions for any special settings as defined above.

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

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value given the same arguments.

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"""

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settings = {}

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for client_name in config.sections():

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section = dict(config.items(client_name))

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client = settings[client_name] = {}

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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 _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

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for setting, value in settings.iteritems():

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setattr(self, setting, value)

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if self.enabled:

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if not hasattr(self, "last_enabled"):

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self.last_enabled = datetime.datetime.utcnow()

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if not hasattr(self, "expires"):

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

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+ self.timeout)

524

else:

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self.last_enabled = None

526

self.expires = None

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if config is None:

338

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()

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# function

343

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

344

.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

346

if "secret" in config:

347

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

348

elif "secfile" in config:

349

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

350

(config["secfile"])),

351

"rb") as secfile:

352

self.secret = secfile.read()

353

else:

354

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

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% self.name)

356

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

357

self.created = datetime.datetime.utcnow()

358

self.enabled = False

359

self.last_approval_request = None

360

self.last_enabled = None

361

self.last_checked_ok = None

362

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

363

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

364

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

365

self.disable_hook = disable_hook

537

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self.checker = None

538

367

self.checker_initiator_tag = None

539

368

self.disable_initiator_tag = None

369

self.expires = None

540

370

self.checker_callback_tag = None

371

self.checker_command = config["checker"]

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372

self.current_checker_command = None

542

self.approved = None

373

self.last_connect = None

374

self._approved = None

375

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

376

True)

543

377

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)

378

self.approval_delay = string_to_delta(

379

config["approval_delay"])

380

self.approval_duration = string_to_delta(

381

config["approval_duration"])

382

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

558

383

559

# Send notice to process children that client state has changed

560

384

def send_changedstate(self):

561

with self.changedstate:

562

self.changedstate.notify_all()

563

385

self.changedstate.acquire()

386

self.changedstate.notify_all()

387

self.changedstate.release()

388

564

389

def enable(self):

565

390

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

566

391

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

567

392

# Already enabled

568

393

return

569

394

self.send_changedstate()

395

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

396

# and every interval from then on.

397

self.checker_initiator_tag = (gobject.timeout_add

398

(self.interval_milliseconds(),

399

self.start_checker))

400

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

570

401

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

402

self.disable_initiator_tag = (gobject.timeout_add

403

(self.timeout_milliseconds(),

404

self.disable))

571

405

self.enabled = True

572

406

self.last_enabled = datetime.datetime.utcnow()

573

self.init_checker()

407

# Also start a new checker *right now*.

408

self.start_checker()

574

409

575

410

def disable(self, quiet=True):

576

411

"""Disable this client."""

588

423

gobject.source_remove(self.checker_initiator_tag)

589

424

self.checker_initiator_tag = None

590

425

self.stop_checker()

426

if self.disable_hook:

427

self.disable_hook(self)

591

428

self.enabled = False

592

429

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

593

430

return False

594

431

595

432

def __del__(self):

433

self.disable_hook = None

596

434

self.disable()

597

435

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

436

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

612

437

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

613

438

self.checker_callback_tag = None

614

439

self.checker = None

615

440

if os.WIFEXITED(condition):

616

self.last_checker_status = os.WEXITSTATUS(condition)

617

if self.last_checker_status == 0:

441

exitstatus = os.WEXITSTATUS(condition)

442

if exitstatus == 0:

618

443

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

619

444

vars(self))

620

445

self.checked_ok()

622

447

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

623

448

vars(self))

624

449

else:

625

self.last_checker_status = -1

626

450

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

627

451

vars(self))

628

452

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."""

453

def checked_ok(self, timeout=None):

454

"""Bump up the timeout for this client.

455

456

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

457

alive and well.

458

"""

637

459

if timeout is None:

638

460

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

461

self.last_checked_ok = datetime.datetime.utcnow()

462

gobject.source_remove(self.disable_initiator_tag)

463

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

464

self.disable_initiator_tag = (gobject.timeout_add

465

(_timedelta_to_milliseconds(timeout),

466

self.disable))

646

467

647

468

def need_approval(self):

648

469

self.last_approval_request = datetime.datetime.utcnow()

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",

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",

936

759

variant_level=variant_level)

937

760

938

761

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

762

class ClientDBus(Client, DBusObjectWithProperties):

1038

763

"""A Client class using D-Bus

1039

764

1048

773

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

1049

774

1050

775

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

776

self._approvals_pending = 0

1051

777

self.bus = bus

1052

778

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

1053

779

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

1063

789

def notifychangeproperty(transform_func,

1064

790

dbus_name, type_func=lambda x: x,

1065

791

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

792

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

793

changes to DBus.

794

transform_fun: Function that takes a value and transform it to

795

DBus type.

796

dbus_name: DBus name of the variable

1072

797

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

798

to DBus

799

variant_level: DBus variant level. default: 1

1075

800

"""

1076

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

801

real_value = [None,]

1077

802

def setter(self, value):

803

old_value = real_value[0]

804

real_value[0] = value

1078

805

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)

806

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

807

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

808

variant_level)

1085

809

self.PropertyChanged(dbus.String(dbus_name),

1086

810

dbus_value)

1087

setattr(self, attrname, value)

1088

811

1089

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

812

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

1090

813

1091

814

1092

815

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1097

820

last_enabled = notifychangeproperty(datetime_to_dbus,

1098

821

"LastEnabled")

1099

822

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

1100

type_func = lambda checker:

1101

checker is not None)

823

type_func = lambda checker: checker is not None)

1102

824

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1103

825

"LastCheckedOK")

1104

last_checker_status = notifychangeproperty(dbus.Int16,

1105

"LastCheckerStatus")

1106

last_approval_request = notifychangeproperty(

1107

datetime_to_dbus, "LastApprovalRequest")

826

last_approval_request = notifychangeproperty(datetime_to_dbus,

827

"LastApprovalRequest")

1108

828

approved_by_default = notifychangeproperty(dbus.Boolean,

1109

829

"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)

830

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

831

type_func = _timedelta_to_milliseconds)

832

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

833

type_func = _timedelta_to_milliseconds)

1117

834

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)

835

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

836

type_func = _timedelta_to_milliseconds)

837

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

838

type_func = _timedelta_to_milliseconds)

839

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

840

type_func = _timedelta_to_milliseconds)

1128

841

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

1129

842

1130

843

del notifychangeproperty

1172

885

return r

1173

886

1174

887

def _reset_approved(self):

1175

self.approved = None

888

self._approved = None

1176

889

return False

1177

890

1178

891

def approve(self, value=True):

1179

892

self.send_changedstate()

1180

self.approved = value

1181

gobject.timeout_add(timedelta_to_milliseconds

893

self._approved = value

894

gobject.timeout_add(_timedelta_to_milliseconds

1182

895

(self.approval_duration),

1183

896

self._reset_approved)

1184

897

1185

898

1186

899

## D-Bus methods, signals & properties

1187

_interface = "se.recompile.Mandos.Client"

900

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

1188

901

1189

902

## Signals

1190

903

1290

1003

access="readwrite")

1291

1004

def ApprovalDuration_dbus_property(self, value=None):

1292

1005

if value is None: # get

1293

return dbus.UInt64(timedelta_to_milliseconds(

1006

return dbus.UInt64(_timedelta_to_milliseconds(

1294

1007

self.approval_duration))

1295

1008

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

1296

1009

1310

1023

def Host_dbus_property(self, value=None):

1311

1024

if value is None: # get

1312

1025

return dbus.String(self.host)

1313

self.host = unicode(value)

1026

self.host = value

1314

1027

1315

1028

# Created - property

1316

1029

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

1317

1030

def Created_dbus_property(self):

1318

return datetime_to_dbus(self.created)

1031

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

1319

1032

1320

1033

# LastEnabled - property

1321

1034

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

1342

1055

return

1343

1056

return datetime_to_dbus(self.last_checked_ok)

1344

1057

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

1058

# Expires - property

1352

1059

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

1353

1060

def Expires_dbus_property(self):

1365

1072

if value is None: # get

1366

1073

return dbus.UInt64(self.timeout_milliseconds())

1367

1074

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

1075

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

1076

return

1368

1077

# 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))

1078

gobject.source_remove(self.disable_initiator_tag)

1079

self.disable_initiator_tag = None

1080

self.expires = None

1081

time_to_die = (self.

1082

_timedelta_to_milliseconds((self

1083

.last_checked_ok

1084

+ self.timeout)

1085

- datetime.datetime

1086

.utcnow()))

1087

if time_to_die <= 0:

1088

# The timeout has passed

1089

self.disable()

1090

else:

1091

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

1092

+ datetime.timedelta(milliseconds = time_to_die))

1093

self.disable_initiator_tag = (gobject.timeout_add

1094

(time_to_die, self.disable))

1387

1095

1388

1096

# ExtendedTimeout - property

1389

1097

@dbus_service_property(_interface, signature="t",

1402

1110

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

1403

1111

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

1404

1112

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

1113

# Reschedule checker run

1114

gobject.source_remove(self.checker_initiator_tag)

1115

self.checker_initiator_tag = (gobject.timeout_add

1116

(value, self.start_checker))

1117

self.start_checker() # Start one now, too

1411

1118

1412

1119

# Checker - property

1413

1120

@dbus_service_property(_interface, signature="s",

1415

1122

def Checker_dbus_property(self, value=None):

1416

1123

if value is None: # get

1417

1124

return dbus.String(self.checker_command)

1418

self.checker_command = unicode(value)

1125

self.checker_command = value

1419

1126

1420

1127

# CheckerRunning - property

1421

1128

@dbus_service_property(_interface, signature="b",

1450

1157

raise KeyError()

1451

1158

1452

1159

def __getattribute__(self, name):

1453

if name == '_pipe':

1160

if(name == '_pipe'):

1454

1161

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

1455

1162

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

1456

1163

data = self._pipe.recv()

1463

1170

return func

1464

1171

1465

1172

def __setattr__(self, name, value):

1466

if name == '_pipe':

1173

if(name == '_pipe'):

1467

1174

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

1468

1175

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

1469

1176

1470

1177

1471

class ClientDBusTransitional(ClientDBus):

1472

__metaclass__ = AlternateDBusNamesMetaclass

1473

1474

1475

1178

class ClientHandler(socketserver.BaseRequestHandler, object):

1476

1179

"""A class to handle client connections.

1477

1180

1556

1259

client.name)

1557

1260

if self.server.use_dbus:

1558

1261

# Emit D-Bus signal

1559

client.Rejected("Disabled")

1262

client.Rejected("Disabled")

1560

1263

return

1561

1264

1562

if client.approved or not client.approval_delay:

1265

if client._approved or not client.approval_delay:

1563

1266

#We are approved or approval is disabled

1564

1267

break

1565

elif client.approved is None:

1268

elif client._approved is None:

1566

1269

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

1567

1270

client.name)

1568

1271

if self.server.use_dbus:

1579

1282

return

1580

1283

1581

1284

#wait until timeout or approved

1285

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

1582

1286

time = datetime.datetime.now()

1583

1287

client.changedstate.acquire()

1584

(client.changedstate.wait

1585

(float(client.timedelta_to_milliseconds(delay)

1586

/ 1000)))

1288

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

1587

1289

client.changedstate.release()

1588

1290

time2 = datetime.datetime.now()

1589

1291

if (time2 - time) >= delay:

1613

1315

sent_size += sent

1614

1316

1615

1317

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

1616

# bump the timeout using extended_timeout

1617

client.bump_timeout(client.extended_timeout)

1318

# bump the timeout as if seen

1319

client.checked_ok(client.extended_timeout)

1618

1320

if self.server.use_dbus:

1619

1321

# Emit D-Bus signal

1620

1322

client.GotSecret()

1687

1389

# Convert the buffer to a Python bytestring

1688

1390

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

1689

1391

# Convert the bytestring to hexadecimal notation

1690

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

1392

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

1691

1393

return hex_fpr

1692

1394

1693

1395

1696

1398

def sub_process_main(self, request, address):

1697

1399

try:

1698

1400

self.finish_request(request, address)

1699

except Exception:

1401

except:

1700

1402

self.handle_error(request, address)

1701

1403

self.close_request(request)

1702

1404

1703

1405

def process_request(self, request, address):

1704

1406

"""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

1407

multiprocessing.Process(target = self.sub_process_main,

1408

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

1710

1409

1711

1410

1712

1411

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1718

1417

"""

1719

1418

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1720

1419

1721

proc = MultiprocessingMixIn.process_request(self, request,

1722

client_address)

1420

super(MultiprocessingMixInWithPipe,

1421

self).process_request(request, client_address)

1723

1422

self.child_pipe.close()

1724

self.add_pipe(parent_pipe, proc)

1423

self.add_pipe(parent_pipe)

1725

1424

1726

def add_pipe(self, parent_pipe, proc):

1425

def add_pipe(self, parent_pipe):

1727

1426

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

1728

1427

raise NotImplementedError

1729

1428

1807

1506

self.enabled = False

1808

1507

self.clients = clients

1809

1508

if self.clients is None:

1810

self.clients = {}

1509

self.clients = set()

1811

1510

self.use_dbus = use_dbus

1812

1511

self.gnutls_priority = gnutls_priority

1813

1512

IPv6_TCPServer.__init__(self, server_address,

1817

1516

def server_activate(self):

1818

1517

if self.enabled:

1819

1518

return socketserver.TCPServer.server_activate(self)

1820

1821

1519

def enable(self):

1822

1520

self.enabled = True

1823

1824

def add_pipe(self, parent_pipe, proc):

1521

def add_pipe(self, parent_pipe):

1825

1522

# Call "handle_ipc" for both data and EOF events

1826

1523

gobject.io_add_watch(parent_pipe.fileno(),

1827

1524

gobject.IO_IN | gobject.IO_HUP,

1828

1525

functools.partial(self.handle_ipc,

1829

parent_pipe =

1830

parent_pipe,

1831

proc = proc))

1832

1526

parent_pipe = parent_pipe))

1527

1833

1528

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

1834

proc = None, client_object=None):

1529

client_object=None):

1835

1530

condition_names = {

1836

1531

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

1837

1532

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

1846

1541

for cond, name in

1847

1542

condition_names.iteritems()

1848

1543

if cond & condition)

1849

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

1544

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

1850

1545

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

1851

# Wait for other process to exit

1852

proc.join()

1853

1546

return False

1854

1547

1855

1548

# Read a request from the child

1860

1553

fpr = request[1]

1861

1554

address = request[2]

1862

1555

1863

for c in self.clients.itervalues():

1556

for c in self.clients:

1864

1557

if c.fingerprint == fpr:

1865

1558

client = c

1866

1559

break

1869

1562

"dress: %s", fpr, address)

1870

1563

if self.use_dbus:

1871

1564

# Emit D-Bus signal

1872

mandos_dbus_service.ClientNotFound(fpr,

1873

address[0])

1565

mandos_dbus_service.ClientNotFound(fpr, address[0])

1874

1566

parent_pipe.send(False)

1875

1567

return False

1876

1568

1877

1569

gobject.io_add_watch(parent_pipe.fileno(),

1878

1570

gobject.IO_IN | gobject.IO_HUP,

1879

1571

functools.partial(self.handle_ipc,

1880

parent_pipe =

1881

parent_pipe,

1882

proc = proc,

1883

client_object =

1884

client))

1572

parent_pipe = parent_pipe,

1573

client_object = client))

1885

1574

parent_pipe.send(True)

1886

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

1887

# same fileno

1575

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

1888

1576

return False

1889

1577

if command == 'funcall':

1890

1578

funcname = request[1]

1891

1579

args = request[2]

1892

1580

kwargs = request[3]

1893

1581

1894

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

1895

funcname)(*args,

1896

**kwargs)))

1582

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

1897

1583

1898

1584

if command == 'getattr':

1899

1585

attrname = request[1]

1900

1586

if callable(client_object.__getattribute__(attrname)):

1901

1587

parent_pipe.send(('function',))

1902

1588

else:

1903

parent_pipe.send(('data', client_object

1904

.__getattribute__(attrname)))

1589

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

1905

1590

1906

1591

if command == 'setattr':

1907

1592

attrname = request[1]

1950

1635

return timevalue

1951

1636

1952

1637

1638

def if_nametoindex(interface):

1639

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

1640

1641

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

1642

global if_nametoindex

1643

try:

1644

if_nametoindex = (ctypes.cdll.LoadLibrary

1645

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

1646

.if_nametoindex)

1647

except (OSError, AttributeError):

1648

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

1649

def if_nametoindex(interface):

1650

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

1651

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

1652

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

1653

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1654

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

1655

interface))

1656

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

1657

ifreq[16:20])[0]

1658

return interface_index

1659

return if_nametoindex(interface)

1660

1661

1953

1662

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

1954

1663

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

1955

1664

2010

1719

" system bus interface")

2011

1720

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

2012

1721

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

1722

options = parser.parse_args()

2020

1723

2021

1724

if options.check:

2034

1737

"use_dbus": "True",

2035

1738

"use_ipv6": "True",

2036

1739

"debuglevel": "",

2037

"restore": "True",

2038

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

2039

1740

}

2040

1741

2041

1742

# Parse config file for server-global settings

2058

1759

# options, if set.

2059

1760

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

2060

1761

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

2061

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

2062

"statedir"):

1762

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

2063

1763

value = getattr(options, option)

2064

1764

if value is not None:

2065

1765

server_settings[option] = value

2077

1777

debuglevel = server_settings["debuglevel"]

2078

1778

use_dbus = server_settings["use_dbus"]

2079

1779

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

1780

2092

1781

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

2093

1782

syslogger.setFormatter(logging.Formatter

2096

1785

% server_settings["servicename"]))

2097

1786

2098

1787

# Parse config file with clients

2099

client_config = configparser.SafeConfigParser(Client

2100

.client_defaults)

1788

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

1789

"extended_timeout": "15m",

1790

"interval": "2m",

1791

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

1792

"host": "",

1793

"approval_delay": "0s",

1794

"approval_duration": "1s",

1795

}

1796

client_config = configparser.SafeConfigParser(client_defaults)

2101

1797

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

2102

1798

"clients.conf"))

2103

1799

2141

1837

if error[0] != errno.EPERM:

2142

1838

raise error

2143

1839

1840

if not debug and not debuglevel:

1841

syslogger.setLevel(logging.WARNING)

1842

console.setLevel(logging.WARNING)

1843

if debuglevel:

1844

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

1845

syslogger.setLevel(level)

1846

console.setLevel(level)

1847

2144

1848

if debug:

2145

1849

# Enable all possible GnuTLS debugging

2146

1850

2160

1864

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

2161

1865

if null > 2:

2162

1866

os.close(null)

1867

else:

1868

# No console logging

1869

logger.removeHandler(console)

2163

1870

2164

1871

# Need to fork before connecting to D-Bus

2165

1872

if not debug:

2166

1873

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

2167

1874

daemon()

2168

1875

2169

gobject.threads_init()

2170

2171

1876

global main_loop

2172

1877

# From the Avahi example code

2173

1878

DBusGMainLoop(set_as_default=True )

2176

1881

# End of Avahi example code

2177

1882

if use_dbus:

2178

1883

try:

2179

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

1884

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

2180

1885

bus, do_not_queue=True)

2181

old_bus_name = (dbus.service.BusName

2182

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

2183

do_not_queue=True))

2184

1886

except dbus.exceptions.NameExistsException as e:

2185

1887

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

2186

1888

use_dbus = False

2187

1889

server_settings["use_dbus"] = False

2188

1890

tcp_server.use_dbus = False

2189

1891

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)

1892

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

1893

servicetype = "_mandos._tcp",

1894

protocol = protocol, bus = bus)

2194

1895

if server_settings["interface"]:

2195

1896

service.interface = (if_nametoindex

2196

1897

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

2200

1901

2201

1902

client_class = Client

2202

1903

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))

1904

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

1905

def client_config_items(config, section):

1906

special_settings = {

1907

"approved_by_default":

1908

lambda: config.getboolean(section,

1909

"approved_by_default"),

1910

}

1911

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

2272

1912

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

1913

yield (name, special_settings[name]())

1914

except KeyError:

1915

yield (name, value)

1916

1917

tcp_server.clients.update(set(

1918

client_class(name = section,

1919

config= dict(client_config_items(

1920

client_config, section)))

1921

for section in client_config.sections()))

2298

1922

if not tcp_server.clients:

2299

1923

logger.warning("No clients defined")

2300

1924

2311

1935

# "pidfile" was never created

2312

1936

pass

2313

1937

del pidfilename

1938

2314

1939

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

2315

1940

2316

1941

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

2321

1946

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

2322

1947

def __init__(self):

2323

1948

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

2324

_interface = "se.recompile.Mandos"

1949

_interface = "se.bsnet.fukt.Mandos"

2325

1950

2326

1951

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

2327

1952

def ClientAdded(self, objpath):

2342

1967

def GetAllClients(self):

2343

1968

"D-Bus method"

2344

1969

return dbus.Array(c.dbus_object_path

2345

for c in

2346

tcp_server.clients.itervalues())

1970

for c in tcp_server.clients)

2347

1971

2348

1972

@dbus.service.method(_interface,

2349

1973

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

2351

1975

"D-Bus method"

2352

1976

return dbus.Dictionary(

2353

1977

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

2354

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

1978

for c in tcp_server.clients),

2355

1979

signature="oa{sv}")

2356

1980

2357

1981

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

2358

1982

def RemoveClient(self, object_path):

2359

1983

"D-Bus method"

2360

for c in tcp_server.clients.itervalues():

1984

for c in tcp_server.clients:

2361

1985

if c.dbus_object_path == object_path:

2362

del tcp_server.clients[c.name]

1986

tcp_server.clients.remove(c)

2363

1987

c.remove_from_connection()

2364

1988

# Don't signal anything except ClientRemoved

2365

1989

c.disable(quiet=True)

2370

1994

2371

1995

del _interface

2372

1996

2373

class MandosDBusServiceTransitional(MandosDBusService):

2374

__metaclass__ = AlternateDBusNamesMetaclass

2375

mandos_dbus_service = MandosDBusServiceTransitional()

1997

mandos_dbus_service = MandosDBusService()

2376

1998

2377

1999

def cleanup():

2378

2000

"Cleanup function; run on exit"

2379

2001

service.cleanup()

2380

2002

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

2003

while tcp_server.clients:

2435

name, client = tcp_server.clients.popitem()

2004

client = tcp_server.clients.pop()

2436

2005

if use_dbus:

2437

2006

client.remove_from_connection()

2007

client.disable_hook = None

2438

2008

# Don't signal anything except ClientRemoved

2439

2009

client.disable(quiet=True)

2440

2010

if use_dbus:

2441

2011

# Emit D-Bus signal

2442

mandos_dbus_service.ClientRemoved(client

2443

.dbus_object_path,

2012

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2444

2013

client.name)

2445

client_settings.clear()

2446

2014

2447

2015

atexit.register(cleanup)

2448

2016

2449

for client in tcp_server.clients.itervalues():

2017

for client in tcp_server.clients:

2450

2018

if use_dbus:

2451

2019

# Emit D-Bus signal

2452

2020

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2453

# Need to initiate checking of clients

2454

if client.enabled:

2455

client.init_checker()

2021

client.enable()

2456

2022

2457

2023

tcp_server.enable()

2458

2024

tcp_server.server_activate()

2498

2064

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

2499

2065

cleanup()

2500

2066

2067

2501

2068

if __name__ == '__main__':

2502

2069

main()