/mandos/trunk : revision 551

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

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#

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# Everything else is

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#

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

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

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# along with this program. If not, see

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

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#

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

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

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#

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from __future__ import (division, absolute_import, print_function,

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import dbus

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import dbus.service

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import ctypes.util

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import xml.dom.minidom

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import inspect

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import GnuPGInterface

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.3.1"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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version = "1.5.1"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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

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"""init logger and add loglevel"""

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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

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pass

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class PGPEngine(object):

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

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def __init__(self):

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self.gnupg = GnuPGInterface.GnuPG()

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

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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

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'--quiet',

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'--no-use-agent'])

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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def encrypt(self, data, password):

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

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with open(os.devnull) 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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class AvahiError(Exception):

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

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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

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self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

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

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self.name)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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self.remove()

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try:

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self.add()

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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) as e:

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dbus.exceptions.DBusException):

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pass

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self.group = None

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self.remove()

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self.server_state_changed)

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self.server_state_changed(self.server.GetState())

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class AvahiServiceToSyslog(AvahiService):

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def rename(self):

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"""Add the new name to the syslog messages"""

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ret = AvahiService.rename(self)

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syslogger.setFormatter(logging.Formatter

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('Mandos (%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_enabled: datetime.datetime(); (UTC)

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last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, or None.

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

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

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D-Bus identifiers

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

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

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

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

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

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"extended_timeout": "15m",

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"interval": "2m",

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

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"host": "",

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"approval_delay": "0s",

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"approval_duration": "1s",

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"approved_by_default": "True",

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"enabled": "True",

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}

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def timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

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return _timedelta_to_milliseconds(self.timeout)

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return timedelta_to_milliseconds(self.timeout)

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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return _timedelta_to_milliseconds(self.extended_timeout)

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return timedelta_to_milliseconds(self.extended_timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return _timedelta_to_milliseconds(self.interval)

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return timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

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return _timedelta_to_milliseconds(self.approval_delay)

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

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return timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

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def config_parser(config):

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

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

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with exceptions for any special settings as defined above.

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

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value given the same arguments.

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"""

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settings = {}

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for client_name in config.sections():

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section = dict(config.items(client_name))

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client = settings[client_name] = {}

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

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# Reformat values from string types to Python types

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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"] = None

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return settings

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

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510

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

335

511

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

336

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attribute."""

337

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self.name = name

338

if config is None:

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config = {}

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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)

517

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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()

521

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

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self.expires = None

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

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# Uppercase and remove spaces from fingerprint for later

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530

# comparison purposes with return value from the fingerprint()

343

531

# function

344

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

345

.replace(" ", ""))

346

532

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

347

if "secret" in config:

348

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

349

elif "secfile" in config:

350

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

351

(config["secfile"])),

352

"rb") as secfile:

353

self.secret = secfile.read()

354

else:

355

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

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% 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

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

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

365

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

366

self.disable_hook = disable_hook

533

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

534

datetime.datetime.utcnow())

535

536

# attributes specific for this server instance

367

537

self.checker = None

368

538

self.checker_initiator_tag = None

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539

self.disable_initiator_tag = None

370

self.expires = None

371

540

self.checker_callback_tag = None

372

self.checker_command = config["checker"]

373

541

self.current_checker_command = None

374

self.last_connect = None

375

self._approved = None

376

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

377

True)

542

self.approved = None

378

543

self.approvals_pending = 0

379

self.approval_delay = string_to_delta(

380

config["approval_delay"])

381

self.approval_duration = string_to_delta(

382

config["approval_duration"])

383

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

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)

384

558

559

# Send notice to process children that client state has changed

385

560

def send_changedstate(self):

386

self.changedstate.acquire()

387

self.changedstate.notify_all()

388

self.changedstate.release()

389

561

with self.changedstate:

562

self.changedstate.notify_all()

563

390

564

def enable(self):

391

565

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

392

566

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

393

567

# Already enabled

394

568

return

395

569

self.send_changedstate()

396

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

397

# and every interval from then on.

398

self.checker_initiator_tag = (gobject.timeout_add

399

(self.interval_milliseconds(),

400

self.start_checker))

401

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

402

570

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

403

self.disable_initiator_tag = (gobject.timeout_add

404

(self.timeout_milliseconds(),

405

self.disable))

406

571

self.enabled = True

407

572

self.last_enabled = datetime.datetime.utcnow()

408

# Also start a new checker *right now*.

409

self.start_checker()

573

self.init_checker()

410

574

411

575

def disable(self, quiet=True):

412

576

"""Disable this client."""

424

588

gobject.source_remove(self.checker_initiator_tag)

425

589

self.checker_initiator_tag = None

426

590

self.stop_checker()

427

if self.disable_hook:

428

self.disable_hook(self)

429

591

self.enabled = False

430

592

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

431

593

return False

432

594

433

595

def __del__(self):

434

self.disable_hook = None

435

596

self.disable()

436

597

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

437

611

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

438

612

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

439

613

self.checker_callback_tag = None

440

614

self.checker = None

441

615

if os.WIFEXITED(condition):

442

exitstatus = os.WEXITSTATUS(condition)

443

if exitstatus == 0:

616

self.last_checker_status = os.WEXITSTATUS(condition)

617

if self.last_checker_status == 0:

444

618

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

445

619

vars(self))

446

620

self.checked_ok()

448

622

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

449

623

vars(self))

450

624

else:

625

self.last_checker_status = -1

451

626

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

452

627

vars(self))

453

628

460

635

if timeout is None:

461

636

timeout = self.timeout

462

637

self.last_checked_ok = datetime.datetime.utcnow()

463

gobject.source_remove(self.disable_initiator_tag)

464

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

465

self.disable_initiator_tag = (gobject.timeout_add

466

(_timedelta_to_milliseconds(timeout),

467

self.disable))

638

if self.disable_initiator_tag is not None:

639

gobject.source_remove(self.disable_initiator_tag)

640

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

641

self.disable_initiator_tag = (gobject.timeout_add

642

(timedelta_to_milliseconds

643

(timeout), self.disable))

644

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

468

645

469

646

def need_approval(self):

470

647

self.last_approval_request = datetime.datetime.utcnow()

629

806

"""

630

807

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

631

808

for cls in self.__class__.__mro__

632

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

809

for name, prop in

810

inspect.getmembers(cls, self._is_dbus_property))

633

811

634

812

def _get_dbus_property(self, interface_name, property_name):

635

813

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

636

814

property with the specified name and interface.

637

815

"""

638

816

for cls in self.__class__.__mro__:

639

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

640

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

817

for name, value in (inspect.getmembers

818

(cls, self._is_dbus_property)):

819

if (value._dbus_name == property_name

820

and value._dbus_interface == interface_name):

641

821

return value.__get__(self)

642

822

643

823

# No such property

644

824

raise DBusPropertyNotFound(self.dbus_object_path + ":"

645

825

+ interface_name + "."

646

826

+ property_name)

647

648

827

649

828

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

650

829

out_signature="v")

671

850

# signatures other than "ay".

672

851

if prop._dbus_signature != "ay":

673

852

raise ValueError

674

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

675

for byte in value))

853

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

854

for byte in value))

676

855

prop(value)

677

856

678

857

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

683

862

684

863

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

685

864

"""

686

all = {}

865

properties = {}

687

866

for name, prop in self._get_all_dbus_properties():

688

867

if (interface_name

689

868

and interface_name != prop._dbus_interface):

694

873

continue

695

874

value = prop()

696

875

if not hasattr(value, "variant_level"):

697

all[name] = value

876

properties[name] = value

698

877

continue

699

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

700

value.variant_level+1)

701

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

878

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

879

value.variant_level+1)

880

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

702

881

703

882

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

704

883

out_signature="s",

755

934

return dbus.String(dt.isoformat(),

756

935

variant_level=variant_level)

757

936

758

class transitional_dbus_metaclass(DBusObjectWithProperties.__metaclass__):

937

938

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

939

.__metaclass__):

940

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

941

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

942

"""

759

943

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

760

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

761

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

762

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

763

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

764

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

765

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

766

newfunc = types.FunctionType(unwrappedfunc.func_code,

767

unwrappedfunc.func_globals,

768

unwrappedfunc.func_name,

769

unwrappedfunc.func_defaults,

770

unwrappedfunc.func_closure)

771

new_dbusfunc = dbus.service.signal(

772

new_interface, old_dbusobj._dbus_signature)(newfunc)

773

attr["_transitional_" + attrname] = new_dbusfunc

774

775

def fixscope(func1, func2):

776

def newcall(*args, **kwargs):

777

func1(*args, **kwargs)

778

func2(*args, **kwargs)

779

return newcall

780

781

attr[attrname] = fixscope(old_dbusobj, new_dbusfunc)

782

783

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

784

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

785

new_dbusfunc = (dbus.service.method

786

(new_interface,

787

old_dbusobj._dbus_in_signature,

788

old_dbusobj._dbus_out_signature)

789

(types.FunctionType

790

(old_dbusobj.func_code,

791

old_dbusobj.func_globals,

792

old_dbusobj.func_name,

793

old_dbusobj.func_defaults,

794

old_dbusobj.func_closure)))

795

796

attr[attrname] = new_dbusfunc

797

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

798

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

799

new_dbusfunc = (dbus_service_property

800

(new_interface,

801

old_dbusobj._dbus_signature,

802

old_dbusobj._dbus_access,

803

old_dbusobj._dbus_get_args_options["byte_arrays"])

804

(types.FunctionType

805

(old_dbusobj.func_code,

806

old_dbusobj.func_globals,

807

old_dbusobj.func_name,

808

old_dbusobj.func_defaults,

809

old_dbusobj.func_closure)))

810

811

attr[attrname] = new_dbusfunc

944

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

945

# methods, signals, or properties in them

946

for base in (b for b in bases

947

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

948

# Go though all attributes of the base class

949

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

950

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

951

# with the wrong interface name

952

if (not hasattr(attribute, "_dbus_interface")

953

or not attribute._dbus_interface

954

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

955

continue

956

# Create an alternate D-Bus interface name based on

957

# the current name

958

alt_interface = (attribute._dbus_interface

959

.replace("se.recompile.Mandos",

960

"se.bsnet.fukt.Mandos"))

961

# Is this a D-Bus signal?

962

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

963

# Extract the original non-method function by

964

# black magic

965

nonmethod_func = (dict(

966

zip(attribute.func_code.co_freevars,

967

attribute.__closure__))["func"]

968

.cell_contents)

969

# Create a new, but exactly alike, function

970

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

971

# with the alternate D-Bus interface name

972

new_function = (dbus.service.signal

973

(alt_interface,

974

attribute._dbus_signature)

975

(types.FunctionType(

976

nonmethod_func.func_code,

977

nonmethod_func.func_globals,

978

nonmethod_func.func_name,

979

nonmethod_func.func_defaults,

980

nonmethod_func.func_closure)))

981

# Define a creator of a function to call both the

982

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

983

# signals gets sent when the function is called

984

def fixscope(func1, func2):

985

"""This function is a scope container to pass

986

func1 and func2 to the "call_both" function

987

outside of its arguments"""

988

def call_both(*args, **kwargs):

989

"""This function will emit two D-Bus

990

signals by calling func1 and func2"""

991

func1(*args, **kwargs)

992

func2(*args, **kwargs)

993

return call_both

994

# Create the "call_both" function and add it to

995

# the class

996

attr[attrname] = fixscope(attribute,

997

new_function)

998

# Is this a D-Bus method?

999

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

1000

# Create a new, but exactly alike, function

1001

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

1002

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

1003

# to the class.

1004

attr[attrname] = (dbus.service.method

1005

(alt_interface,

1006

attribute._dbus_in_signature,

1007

attribute._dbus_out_signature)

1008

(types.FunctionType

1009

(attribute.func_code,

1010

attribute.func_globals,

1011

attribute.func_name,

1012

attribute.func_defaults,

1013

attribute.func_closure)))

1014

# Is this a D-Bus property?

1015

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

1016

# Create a new, but exactly alike, function

1017

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

1018

# property with the alternate D-Bus interface

1019

# name. Add it to the class.

1020

attr[attrname] = (dbus_service_property

1021

(alt_interface,

1022

attribute._dbus_signature,

1023

attribute._dbus_access,

1024

attribute

1025

._dbus_get_args_options

1026

["byte_arrays"])

1027

(types.FunctionType

1028

(attribute.func_code,

1029

attribute.func_globals,

1030

attribute.func_name,

1031

attribute.func_defaults,

1032

attribute.func_closure)))

812

1033

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

813

1034

1035

814

1036

class ClientDBus(Client, DBusObjectWithProperties):

815

1037

"""A Client class using D-Bus

816

1038

825

1047

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

826

1048

827

1049

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

828

self._approvals_pending = 0

829

1050

self.bus = bus

830

1051

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

1052

self._approvals_pending = 0

1053

1054

self._approvals_pending = 0

831

1055

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

832

1056

# the D-Bus

833

1057

client_object_name = unicode(self.name).translate(

841

1065

def notifychangeproperty(transform_func,

842

1066

dbus_name, type_func=lambda x: x,

843

1067

variant_level=1):

844

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

845

changes to DBus.

846

transform_fun: Function that takes a value and transform it to

847

DBus type.

848

dbus_name: DBus name of the variable

1068

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

1069

its changes to DBus.

1070

1071

transform_fun: Function that takes a value and a variant_level

1072

and transforms it to a D-Bus type.

1073

dbus_name: D-Bus name of the variable

849

1074

type_func: Function that transform the value before sending it

850

to DBus

851

variant_level: DBus variant level. default: 1

1075

to the D-Bus. Default: no transform

1076

variant_level: D-Bus variant level. Default: 1

852

1077

"""

853

real_value = [None,]

1078

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

854

1079

def setter(self, value):

855

old_value = real_value[0]

856

real_value[0] = value

857

1080

if hasattr(self, "dbus_object_path"):

858

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

859

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

860

variant_level)

1081

if (not hasattr(self, attrname) or

1082

type_func(getattr(self, attrname, None))

1083

!= type_func(value)):

1084

dbus_value = transform_func(type_func(value),

1085

variant_level

1086

=variant_level)

861

1087

self.PropertyChanged(dbus.String(dbus_name),

862

1088

dbus_value)

1089

setattr(self, attrname, value)

863

1090

864

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

1091

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

865

1092

866

1093

867

1094

expires = notifychangeproperty(datetime_to_dbus, "Expires")

872

1099

last_enabled = notifychangeproperty(datetime_to_dbus,

873

1100

"LastEnabled")

874

1101

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

875

type_func = lambda checker: checker is not None)

1102

type_func = lambda checker:

1103

checker is not None)

876

1104

last_checked_ok = notifychangeproperty(datetime_to_dbus,

877

1105

"LastCheckedOK")

878

last_approval_request = notifychangeproperty(datetime_to_dbus,

879

"LastApprovalRequest")

1106

last_approval_request = notifychangeproperty(

1107

datetime_to_dbus, "LastApprovalRequest")

880

1108

approved_by_default = notifychangeproperty(dbus.Boolean,

881

1109

"ApprovedByDefault")

882

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

883

type_func = _timedelta_to_milliseconds)

884

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

885

type_func = _timedelta_to_milliseconds)

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)

886

1117

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

887

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

888

type_func = _timedelta_to_milliseconds)

889

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

890

type_func = _timedelta_to_milliseconds)

891

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

892

type_func = _timedelta_to_milliseconds)

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)

893

1128

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

894

1129

895

1130

del notifychangeproperty

937

1172

return r

938

1173

939

1174

def _reset_approved(self):

940

self._approved = None

1175

self.approved = None

941

1176

return False

942

1177

943

1178

def approve(self, value=True):

944

1179

self.send_changedstate()

945

self._approved = value

946

gobject.timeout_add(_timedelta_to_milliseconds

1180

self.approved = value

1181

gobject.timeout_add(timedelta_to_milliseconds

947

1182

(self.approval_duration),

948

1183

self._reset_approved)

949

1184

950

1185

951

1186

## D-Bus methods, signals & properties

952

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

953

1187

_interface = "se.recompile.Mandos.Client"

1188

954

1189

## Signals

955

1190

956

1191

# CheckerCompleted - signal

992

1227

"D-Bus signal"

993

1228

return self.need_approval()

994

1229

1230

# NeRwequest - signal

1231

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

1232

def NewRequest(self, ip):

1233

"""D-Bus signal

1234

Is sent after a client request a password.

1235

"""

1236

pass

1237

995

1238

## Methods

996

1239

997

1240

# Approve - method

1055

1298

access="readwrite")

1056

1299

def ApprovalDuration_dbus_property(self, value=None):

1057

1300

if value is None: # get

1058

return dbus.UInt64(_timedelta_to_milliseconds(

1301

return dbus.UInt64(timedelta_to_milliseconds(

1059

1302

self.approval_duration))

1060

1303

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

1061

1304

1075

1318

def Host_dbus_property(self, value=None):

1076

1319

if value is None: # get

1077

1320

return dbus.String(self.host)

1078

self.host = value

1321

self.host = unicode(value)

1079

1322

1080

1323

# Created - property

1081

1324

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

1082

1325

def Created_dbus_property(self):

1083

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

1326

return datetime_to_dbus(self.created)

1084

1327

1085

1328

# LastEnabled - property

1086

1329

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

1124

1367

if value is None: # get

1125

1368

return dbus.UInt64(self.timeout_milliseconds())

1126

1369

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

1127

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

1128

return

1129

1370

# Reschedule timeout

1130

gobject.source_remove(self.disable_initiator_tag)

1131

self.disable_initiator_tag = None

1132

self.expires = None

1133

time_to_die = (self.

1134

_timedelta_to_milliseconds((self

1135

.last_checked_ok

1136

+ self.timeout)

1137

- datetime.datetime

1138

.utcnow()))

1139

if time_to_die <= 0:

1140

# The timeout has passed

1141

self.disable()

1142

else:

1143

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

1144

+ datetime.timedelta(milliseconds = time_to_die))

1145

self.disable_initiator_tag = (gobject.timeout_add

1146

(time_to_die, self.disable))

1371

if self.enabled:

1372

now = datetime.datetime.utcnow()

1373

time_to_die = timedelta_to_milliseconds(

1374

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

1375

if time_to_die <= 0:

1376

# The timeout has passed

1377

self.disable()

1378

else:

1379

self.expires = (now +

1380

datetime.timedelta(milliseconds =

1381

time_to_die))

1382

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

1383

is None):

1384

return

1385

gobject.source_remove(self.disable_initiator_tag)

1386

self.disable_initiator_tag = (gobject.timeout_add

1387

(time_to_die,

1388

self.disable))

1147

1389

1148

1390

# ExtendedTimeout - property

1149

1391

@dbus_service_property(_interface, signature="t",

1162

1404

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

1163

1405

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

1164

1406

return

1165

# Reschedule checker run

1166

gobject.source_remove(self.checker_initiator_tag)

1167

self.checker_initiator_tag = (gobject.timeout_add

1168

(value, self.start_checker))

1169

self.start_checker() # Start one now, too

1407

if self.enabled:

1408

# Reschedule checker run

1409

gobject.source_remove(self.checker_initiator_tag)

1410

self.checker_initiator_tag = (gobject.timeout_add

1411

(value, self.start_checker))

1412

self.start_checker() # Start one now, too

1170

1413

1171

1414

# Checker - property

1172

1415

@dbus_service_property(_interface, signature="s",

1174

1417

def Checker_dbus_property(self, value=None):

1175

1418

if value is None: # get

1176

1419

return dbus.String(self.checker_command)

1177

self.checker_command = value

1420

self.checker_command = unicode(value)

1178

1421

1179

1422

# CheckerRunning - property

1180

1423

@dbus_service_property(_interface, signature="b",

1209

1452

raise KeyError()

1210

1453

1211

1454

def __getattribute__(self, name):

1212

if(name == '_pipe'):

1455

if name == '_pipe':

1213

1456

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

1214

1457

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

1215

1458

data = self._pipe.recv()

1222

1465

return func

1223

1466

1224

1467

def __setattr__(self, name, value):

1225

if(name == '_pipe'):

1468

if name == '_pipe':

1226

1469

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

1227

1470

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

1228

1471

1472

1229

1473

class ClientDBusTransitional(ClientDBus):

1230

__metaclass__ = transitional_dbus_metaclass

1474

__metaclass__ = AlternateDBusNamesMetaclass

1475

1231

1476

1232

1477

class ClientHandler(socketserver.BaseRequestHandler, object):

1233

1478

"""A class to handle client connections.

1302

1547

except KeyError:

1303

1548

return

1304

1549

1550

if self.server.use_dbus:

1551

# Emit D-Bus signal

1552

client.NewRequest(str(self.client_address))

1553

1305

1554

if client.approval_delay:

1306

1555

delay = client.approval_delay

1307

1556

client.approvals_pending += 1

1313

1562

client.name)

1314

1563

if self.server.use_dbus:

1315

1564

# Emit D-Bus signal

1316

client.Rejected("Disabled")

1565

client.Rejected("Disabled")

1317

1566

return

1318

1567

1319

if client._approved or not client.approval_delay:

1568

if client.approved or not client.approval_delay:

1320

1569

#We are approved or approval is disabled

1321

1570

break

1322

elif client._approved is None:

1571

elif client.approved is None:

1323

1572

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

1324

1573

client.name)

1325

1574

if self.server.use_dbus:

1336

1585

return

1337

1586

1338

1587

#wait until timeout or approved

1339

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

1340

1588

time = datetime.datetime.now()

1341

1589

client.changedstate.acquire()

1342

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

1590

(client.changedstate.wait

1591

(float(client.timedelta_to_milliseconds(delay)

1592

/ 1000)))

1343

1593

client.changedstate.release()

1344

1594

time2 = datetime.datetime.now()

1345

1595

if (time2 - time) >= delay:

1369

1619

sent_size += sent

1370

1620

1371

1621

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

1372

# bump the timeout as if seen

1622

# bump the timeout using extended_timeout

1373

1623

client.checked_ok(client.extended_timeout)

1374

1624

if self.server.use_dbus:

1375

1625

# Emit D-Bus signal

1443

1693

# Convert the buffer to a Python bytestring

1444

1694

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

1445

1695

# Convert the bytestring to hexadecimal notation

1446

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

1696

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

1447

1697

return hex_fpr

1448

1698

1449

1699

1452

1702

def sub_process_main(self, request, address):

1453

1703

try:

1454

1704

self.finish_request(request, address)

1455

except:

1705

except Exception:

1456

1706

self.handle_error(request, address)

1457

1707

self.close_request(request)

1458

1708

1459

1709

def process_request(self, request, address):

1460

1710

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

1461

multiprocessing.Process(target = self.sub_process_main,

1462

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

1711

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

1712

args = (request,

1713

address))

1714

proc.start()

1715

return proc

1463

1716

1464

1717

1465

1718

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1471

1724

"""

1472

1725

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1473

1726

1474

super(MultiprocessingMixInWithPipe,

1475

self).process_request(request, client_address)

1727

proc = MultiprocessingMixIn.process_request(self, request,

1728

client_address)

1476

1729

self.child_pipe.close()

1477

self.add_pipe(parent_pipe)

1730

self.add_pipe(parent_pipe, proc)

1478

1731

1479

def add_pipe(self, parent_pipe):

1732

def add_pipe(self, parent_pipe, proc):

1480

1733

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

1481

1734

raise NotImplementedError

1482

1735

1560

1813

self.enabled = False

1561

1814

self.clients = clients

1562

1815

if self.clients is None:

1563

self.clients = set()

1816

self.clients = {}

1564

1817

self.use_dbus = use_dbus

1565

1818

self.gnutls_priority = gnutls_priority

1566

1819

IPv6_TCPServer.__init__(self, server_address,

1570

1823

def server_activate(self):

1571

1824

if self.enabled:

1572

1825

return socketserver.TCPServer.server_activate(self)

1826

1573

1827

def enable(self):

1574

1828

self.enabled = True

1575

def add_pipe(self, parent_pipe):

1829

1830

def add_pipe(self, parent_pipe, proc):

1576

1831

# Call "handle_ipc" for both data and EOF events

1577

1832

gobject.io_add_watch(parent_pipe.fileno(),

1578

1833

gobject.IO_IN | gobject.IO_HUP,

1579

1834

functools.partial(self.handle_ipc,

1580

parent_pipe = parent_pipe))

1581

1835

parent_pipe =

1836

parent_pipe,

1837

proc = proc))

1838

1582

1839

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

1583

client_object=None):

1840

proc = None, client_object=None):

1584

1841

condition_names = {

1585

1842

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

1586

1843

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

1595

1852

for cond, name in

1596

1853

condition_names.iteritems()

1597

1854

if cond & condition)

1598

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

1855

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

1599

1856

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

1857

# Wait for other process to exit

1858

proc.join()

1600

1859

return False

1601

1860

1602

1861

# Read a request from the child

1607

1866

fpr = request[1]

1608

1867

address = request[2]

1609

1868

1610

for c in self.clients:

1869

for c in self.clients.itervalues():

1611

1870

if c.fingerprint == fpr:

1612

1871

client = c

1613

1872

break

1616

1875

"dress: %s", fpr, address)

1617

1876

if self.use_dbus:

1618

1877

# Emit D-Bus signal

1619

mandos_dbus_service.ClientNotFound(fpr, address[0])

1878

mandos_dbus_service.ClientNotFound(fpr,

1879

address[0])

1620

1880

parent_pipe.send(False)

1621

1881

return False

1622

1882

1623

1883

gobject.io_add_watch(parent_pipe.fileno(),

1624

1884

gobject.IO_IN | gobject.IO_HUP,

1625

1885

functools.partial(self.handle_ipc,

1626

parent_pipe = parent_pipe,

1627

client_object = client))

1886

parent_pipe =

1887

parent_pipe,

1888

proc = proc,

1889

client_object =

1890

client))

1628

1891

parent_pipe.send(True)

1629

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

1892

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

1893

# same fileno

1630

1894

return False

1631

1895

if command == 'funcall':

1632

1896

funcname = request[1]

1633

1897

args = request[2]

1634

1898

kwargs = request[3]

1635

1899

1636

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

1900

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

1901

funcname)(*args,

1902

**kwargs)))

1637

1903

1638

1904

if command == 'getattr':

1639

1905

attrname = request[1]

1640

1906

if callable(client_object.__getattribute__(attrname)):

1641

1907

parent_pipe.send(('function',))

1642

1908

else:

1643

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

1909

parent_pipe.send(('data', client_object

1910

.__getattribute__(attrname)))

1644

1911

1645

1912

if command == 'setattr':

1646

1913

attrname = request[1]

1689

1956

return timevalue

1690

1957

1691

1958

1692

def if_nametoindex(interface):

1693

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

1694

1695

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

1696

global if_nametoindex

1697

try:

1698

if_nametoindex = (ctypes.cdll.LoadLibrary

1699

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

1700

.if_nametoindex)

1701

except (OSError, AttributeError):

1702

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

1703

def if_nametoindex(interface):

1704

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

1705

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

1706

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

1707

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1708

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

1709

interface))

1710

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

1711

ifreq[16:20])[0]

1712

return interface_index

1713

return if_nametoindex(interface)

1714

1715

1716

1959

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

1717

1960

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

1718

1961

1773

2016

" system bus interface")

1774

2017

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

1775

2018

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

2019

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

2020

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

2021

" state")

2022

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

2023

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

2024

1776

2025

options = parser.parse_args()

1777

2026

1778

2027

if options.check:

1791

2040

"use_dbus": "True",

1792

2041

"use_ipv6": "True",

1793

2042

"debuglevel": "",

2043

"restore": "True",

2044

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

1794

2045

}

1795

2046

1796

2047

# Parse config file for server-global settings

1813

2064

# options, if set.

1814

2065

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

1815

2066

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

1816

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

2067

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

2068

"statedir"):

1817

2069

value = getattr(options, option)

1818

2070

if value is not None:

1819

2071

server_settings[option] = value

1831

2083

debuglevel = server_settings["debuglevel"]

1832

2084

use_dbus = server_settings["use_dbus"]

1833

2085

use_ipv6 = server_settings["use_ipv6"]

2086

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

2087

stored_state_file)

2088

2089

if debug:

2090

initlogger(debug, logging.DEBUG)

2091

else:

2092

if not debuglevel:

2093

initlogger(debug)

2094

else:

2095

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

2096

initlogger(debug, level)

1834

2097

1835

2098

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

1836

2099

syslogger.setFormatter(logging.Formatter

1839

2102

% server_settings["servicename"]))

1840

2103

1841

2104

# Parse config file with clients

1842

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

1843

"extended_timeout": "15m",

1844

"interval": "2m",

1845

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

1846

"host": "",

1847

"approval_delay": "0s",

1848

"approval_duration": "1s",

1849

}

1850

client_config = configparser.SafeConfigParser(client_defaults)

2105

client_config = configparser.SafeConfigParser(Client

2106

.client_defaults)

1851

2107

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

1852

2108

"clients.conf"))

1853

2109

1891

2147

if error[0] != errno.EPERM:

1892

2148

raise error

1893

2149

1894

if not debug and not debuglevel:

1895

syslogger.setLevel(logging.WARNING)

1896

console.setLevel(logging.WARNING)

1897

if debuglevel:

1898

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

1899

syslogger.setLevel(level)

1900

console.setLevel(level)

1901

1902

2150

if debug:

1903

2151

# Enable all possible GnuTLS debugging

1904

2152

1918

2166

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

1919

2167

if null > 2:

1920

2168

os.close(null)

1921

else:

1922

# No console logging

1923

logger.removeHandler(console)

1924

2169

1925

2170

# Need to fork before connecting to D-Bus

1926

2171

if not debug:

1927

2172

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

1928

2173

daemon()

1929

2174

2175

gobject.threads_init()

2176

1930

2177

global main_loop

1931

2178

# From the Avahi example code

1932

2179

DBusGMainLoop(set_as_default=True )

1935

2182

# End of Avahi example code

1936

2183

if use_dbus:

1937

2184

try:

1938

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

1939

bus, do_not_queue=True)

1940

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

1941

bus, do_not_queue=True)

2185

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

2186

bus, do_not_queue=True)

2187

old_bus_name = (dbus.service.BusName

2188

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

2189

do_not_queue=True))

1942

2190

except dbus.exceptions.NameExistsException as e:

1943

2191

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

1944

2192

use_dbus = False

1945

2193

server_settings["use_dbus"] = False

1946

2194

tcp_server.use_dbus = False

1947

2195

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1948

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

1949

servicetype = "_mandos._tcp",

1950

protocol = protocol, bus = bus)

2196

service = AvahiServiceToSyslog(name =

2197

server_settings["servicename"],

2198

servicetype = "_mandos._tcp",

2199

protocol = protocol, bus = bus)

1951

2200

if server_settings["interface"]:

1952

2201

service.interface = (if_nametoindex

1953

2202

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

1957

2206

1958

2207

client_class = Client

1959

2208

if use_dbus:

1960

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

1961

def client_config_items(config, section):

1962

special_settings = {

1963

"approved_by_default":

1964

lambda: config.getboolean(section,

1965

"approved_by_default"),

1966

}

1967

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

2209

client_class = functools.partial(ClientDBusTransitional,

2210

bus = bus)

2211

2212

client_settings = Client.config_parser(client_config)

2213

old_client_settings = {}

2214

clients_data = {}

2215

2216

# Get client data and settings from last running state.

2217

if server_settings["restore"]:

2218

try:

2219

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

2220

clients_data, old_client_settings = (pickle.load

2221

(stored_state))

2222

os.remove(stored_state_path)

2223

except IOError as e:

2224

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

2225

.format(e))

2226

if e.errno != errno.ENOENT:

2227

raise

2228

except EOFError as e:

2229

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

2230

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

2231

2232

with PGPEngine() as pgp:

2233

for client_name, client in clients_data.iteritems():

2234

# Decide which value to use after restoring saved state.

2235

# We have three different values: Old config file,

2236

# new config file, and saved state.

2237

# New config value takes precedence if it differs from old

2238

# config value, otherwise use saved state.

2239

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

2240

try:

2241

# For each value in new config, check if it

2242

# differs from the old config value (Except for

2243

# the "secret" attribute)

2244

if (name != "secret" and

2245

value != old_client_settings[client_name]

2246

[name]):

2247

client[name] = value

2248

except KeyError:

2249

pass

2250

2251

# Clients who has passed its expire date can still be

2252

# enabled if its last checker was successful. Clients

2253

# whose checker failed before we stored its state is

2254

# assumed to have failed all checkers during downtime.

2255

if client["enabled"]:

2256

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

2257

if not client["last_checked_ok"]:

2258

logger.warning(

2259

"disabling client {0} - Client never "

2260

"performed a successfull checker"

2261

.format(client["name"]))

2262

client["enabled"] = False

2263

elif client["last_checker_status"] != 0:

2264

logger.warning(

2265

"disabling client {0} - Client "

2266

"last checker failed with error code {1}"

2267

.format(client["name"],

2268

client["last_checker_status"]))

2269

client["enabled"] = False

2270

else:

2271

client["expires"] = (datetime.datetime

2272

.utcnow()

2273

+ client["timeout"])

2274

logger.debug("Last checker succeeded,"

2275

" keeping {0} enabled"

2276

.format(client["name"]))

1968

2277

try:

1969

yield (name, special_settings[name]())

1970

except KeyError:

1971

yield (name, value)

1972

1973

tcp_server.clients.update(set(

1974

client_class(name = section,

1975

config= dict(client_config_items(

1976

client_config, section)))

1977

for section in client_config.sections()))

2278

client["secret"] = (

2279

pgp.decrypt(client["encrypted_secret"],

2280

client_settings[client_name]

2281

["secret"]))

2282

except PGPError:

2283

# If decryption fails, we use secret from new settings

2284

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

2285

.format(client_name))

2286

client["secret"] = (

2287

client_settings[client_name]["secret"])

2288

2289

2290

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

2291

for client_name in (set(old_client_settings)

2292

- set(client_settings)):

2293

del clients_data[client_name]

2294

for client_name in (set(client_settings)

2295

- set(old_client_settings)):

2296

clients_data[client_name] = client_settings[client_name]

2297

2298

# Create clients all clients

2299

for client_name, client in clients_data.iteritems():

2300

tcp_server.clients[client_name] = client_class(

2301

name = client_name, settings = client)

2302

1978

2303

if not tcp_server.clients:

1979

2304

logger.warning("No clients defined")

1980

2305

1991

2316

# "pidfile" was never created

1992

2317

pass

1993

2318

del pidfilename

1994

1995

2319

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

1996

2320

1997

2321

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

2002

2326

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

2003

2327

def __init__(self):

2004

2328

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

2005

_interface = "se.bsnet.fukt.Mandos"

2329

_interface = "se.recompile.Mandos"

2006

2330

2007

2331

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

2008

2332

def ClientAdded(self, objpath):

2023

2347

def GetAllClients(self):

2024

2348

"D-Bus method"

2025

2349

return dbus.Array(c.dbus_object_path

2026

for c in tcp_server.clients)

2350

for c in

2351

tcp_server.clients.itervalues())

2027

2352

2028

2353

@dbus.service.method(_interface,

2029

2354

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

2031

2356

"D-Bus method"

2032

2357

return dbus.Dictionary(

2033

2358

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

2034

for c in tcp_server.clients),

2359

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

2035

2360

signature="oa{sv}")

2036

2361

2037

2362

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

2038

2363

def RemoveClient(self, object_path):

2039

2364

"D-Bus method"

2040

for c in tcp_server.clients:

2365

for c in tcp_server.clients.itervalues():

2041

2366

if c.dbus_object_path == object_path:

2042

tcp_server.clients.remove(c)

2367

del tcp_server.clients[c.name]

2043

2368

c.remove_from_connection()

2044

2369

# Don't signal anything except ClientRemoved

2045

2370

c.disable(quiet=True)

2051

2376

del _interface

2052

2377

2053

2378

class MandosDBusServiceTransitional(MandosDBusService):

2054

__metaclass__ = transitional_dbus_metaclass

2379

__metaclass__ = AlternateDBusNamesMetaclass

2055

2380

mandos_dbus_service = MandosDBusServiceTransitional()

2056

2381

2057

2382

def cleanup():

2058

2383

"Cleanup function; run on exit"

2059

2384

service.cleanup()

2060

2385

2386

multiprocessing.active_children()

2387

if not (tcp_server.clients or client_settings):

2388

return

2389

2390

# Store client before exiting. Secrets are encrypted with key

2391

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

2392

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

2393

clients = {}

2394

with PGPEngine() as pgp:

2395

for client in tcp_server.clients.itervalues():

2396

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

2397

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

2398

key)

2399

client_dict = {}

2400

2401

# A list of attributes that can not be pickled

2402

# + secret.

2403

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

2404

"checker"))

2405

for name, typ in (inspect.getmembers

2406

(dbus.service.Object)):

2407

exclude.add(name)

2408

2409

client_dict["encrypted_secret"] = (client

2410

.encrypted_secret)

2411

for attr in client.client_structure:

2412

if attr not in exclude:

2413

client_dict[attr] = getattr(client, attr)

2414

2415

clients[client.name] = client_dict

2416

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

2417

2418

try:

2419

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

2420

prefix="clients-",

2421

dir=os.path.dirname

2422

(stored_state_path))

2423

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

2424

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

2425

os.rename(tempname, stored_state_path)

2426

except (IOError, OSError) as e:

2427

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

2428

.format(e))

2429

if not debug:

2430

try:

2431

os.remove(tempname)

2432

except NameError:

2433

pass

2434

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

2435

errno.EEXIST)):

2436

raise e

2437

2438

# Delete all clients, and settings from config

2061

2439

while tcp_server.clients:

2062

client = tcp_server.clients.pop()

2440

name, client = tcp_server.clients.popitem()

2063

2441

if use_dbus:

2064

2442

client.remove_from_connection()

2065

client.disable_hook = None

2066

2443

# Don't signal anything except ClientRemoved

2067

2444

client.disable(quiet=True)

2068

2445

if use_dbus:

2069

2446

# Emit D-Bus signal

2070

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2447

mandos_dbus_service.ClientRemoved(client

2448

.dbus_object_path,

2071

2449

client.name)

2450

client_settings.clear()

2072

2451

2073

2452

atexit.register(cleanup)

2074

2453

2075

for client in tcp_server.clients:

2454

for client in tcp_server.clients.itervalues():

2076

2455

if use_dbus:

2077

2456

# Emit D-Bus signal

2078

2457

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2079

client.enable()

2458

# Need to initiate checking of clients

2459

if client.enabled:

2460

client.init_checker()

2080

2461

2081

2462

tcp_server.enable()

2082

2463

tcp_server.server_activate()

2122

2503

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

2123

2504

cleanup()

2124

2505

2125

2126

2506

if __name__ == '__main__':

2127

2507

main()