/mandos/trunk : revision 502

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

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#

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# Everything else is

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#

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

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

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# along with this program. If not, see

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

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#

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

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

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#

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from __future__ import (division, absolute_import, print_function,

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import functools

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import 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

487

(section["secfile"])),

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"rb") as secfile:

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

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else:

491

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

492

% 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"])

496

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"]

502

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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508

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

330

return _timedelta_to_milliseconds(self.approval_delay)

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

510

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

511

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

512

335

attribute."""

513

336

self.name = name

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# adding all client settings

515

for setting, value in settings.iteritems():

516

setattr(self, setting, value)

517

518

if self.enabled:

519

if not hasattr(self, "last_enabled"):

520

self.last_enabled = datetime.datetime.utcnow()

521

if not hasattr(self, "expires"):

522

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

523

+ self.timeout)

524

else:

525

self.last_enabled = None

526

self.expires = None

527

337

if config is None:

338

config = {}

528

339

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

529

340

# Uppercase and remove spaces from fingerprint for later

530

341

# comparison purposes with return value from the fingerprint()

531

342

# function

343

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

344

.replace(" ", ""))

532

345

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"

355

% self.name)

356

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

357

self.created = datetime.datetime.utcnow()

358

self.enabled = False

359

self.last_approval_request = None

360

self.last_enabled = None

361

self.last_checked_ok = None

362

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

363

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

364

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

365

self.disable_hook = disable_hook

537

366

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"]

541

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()

688

509

'replace')))

689

510

for attr in

690

511

self.runtime_expansions)

691

512

692

513

try:

693

514

command = self.checker_command % escaped_attrs

694

515

except TypeError as error:

740

561

raise

741

562

self.checker = None

742

563

743

744

564

def dbus_service_property(dbus_interface, signature="v",

745

565

access="readwrite", byte_arrays=False):

746

566

"""Decorators for marking methods of a DBusObjectWithProperties to

792

612

793

613

class DBusObjectWithProperties(dbus.service.Object):

794

614

"""A D-Bus object with properties.

795

615

796

616

Classes inheriting from this can use the dbus_service_property

797

617

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

798

618

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

805

625

def _get_all_dbus_properties(self):

806

626

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

807

627

"""

808

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

809

for cls in self.__class__.__mro__

628

return ((prop._dbus_name, prop)

810

629

for name, prop in

811

inspect.getmembers(cls, self._is_dbus_property))

630

inspect.getmembers(self, self._is_dbus_property))

812

631

813

632

def _get_dbus_property(self, interface_name, property_name):

814

633

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

815

634

property with the specified name and interface.

816

635

"""

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

636

for name in (property_name,

637

property_name + "_dbus_property"):

638

prop = getattr(self, name, None)

639

if (prop is None

640

or not self._is_dbus_property(prop)

641

or prop._dbus_name != property_name

642

or (interface_name and prop._dbus_interface

643

and interface_name != prop._dbus_interface)):

644

continue

645

return prop

824

646

# No such property

825

647

raise DBusPropertyNotFound(self.dbus_object_path + ":"

826

648

+ interface_name + "."

851

673

# signatures other than "ay".

852

674

if prop._dbus_signature != "ay":

853

675

raise ValueError

854

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

855

for byte in value))

676

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

677

for byte in value))

856

678

prop(value)

857

679

858

680

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

860

682

def GetAll(self, interface_name):

861

683

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

862

684

standard.

863

685

864

686

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

865

687

"""

866

properties = {}

688

all = {}

867

689

for name, prop in self._get_all_dbus_properties():

868

690

if (interface_name

869

691

and interface_name != prop._dbus_interface):

874

696

continue

875

697

value = prop()

876

698

if not hasattr(value, "variant_level"):

877

properties[name] = value

699

all[name] = value

878

700

continue

879

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

880

value.variant_level+1)

881

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

701

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

702

value.variant_level+1)

703

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

882

704

883

705

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

884

706

out_signature="s",

935

757

return dbus.String(dt.isoformat(),

936

758

variant_level=variant_level)

937

759

938

939

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

940

.__metaclass__):

941

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

942

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

943

"""

944

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

945

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

946

# methods, signals, or properties in them

947

for base in (b for b in bases

948

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

949

# Go though all attributes of the base class

950

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

951

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

952

# with the wrong interface name

953

if (not hasattr(attribute, "_dbus_interface")

954

or not attribute._dbus_interface

955

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

956

continue

957

# Create an alternate D-Bus interface name based on

958

# the current name

959

alt_interface = (attribute._dbus_interface

960

.replace("se.recompile.Mandos",

961

"se.bsnet.fukt.Mandos"))

962

# Is this a D-Bus signal?

963

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

964

# Extract the original non-method function by

965

# black magic

966

nonmethod_func = (dict(

967

zip(attribute.func_code.co_freevars,

968

attribute.__closure__))["func"]

969

.cell_contents)

970

# Create a new, but exactly alike, function

971

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

972

# with the alternate D-Bus interface name

973

new_function = (dbus.service.signal

974

(alt_interface,

975

attribute._dbus_signature)

976

(types.FunctionType(

977

nonmethod_func.func_code,

978

nonmethod_func.func_globals,

979

nonmethod_func.func_name,

980

nonmethod_func.func_defaults,

981

nonmethod_func.func_closure)))

982

# Define a creator of a function to call both the

983

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

984

# signals gets sent when the function is called

985

def fixscope(func1, func2):

986

"""This function is a scope container to pass

987

func1 and func2 to the "call_both" function

988

outside of its arguments"""

989

def call_both(*args, **kwargs):

990

"""This function will emit two D-Bus

991

signals by calling func1 and func2"""

992

func1(*args, **kwargs)

993

func2(*args, **kwargs)

994

return call_both

995

# Create the "call_both" function and add it to

996

# the class

997

attr[attrname] = fixscope(attribute,

998

new_function)

999

# Is this a D-Bus method?

1000

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

1001

# Create a new, but exactly alike, function

1002

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

1003

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

1004

# to the class.

1005

attr[attrname] = (dbus.service.method

1006

(alt_interface,

1007

attribute._dbus_in_signature,

1008

attribute._dbus_out_signature)

1009

(types.FunctionType

1010

(attribute.func_code,

1011

attribute.func_globals,

1012

attribute.func_name,

1013

attribute.func_defaults,

1014

attribute.func_closure)))

1015

# Is this a D-Bus property?

1016

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

1017

# Create a new, but exactly alike, function

1018

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

1019

# property with the alternate D-Bus interface

1020

# name. Add it to the class.

1021

attr[attrname] = (dbus_service_property

1022

(alt_interface,

1023

attribute._dbus_signature,

1024

attribute._dbus_access,

1025

attribute

1026

._dbus_get_args_options

1027

["byte_arrays"])

1028

(types.FunctionType

1029

(attribute.func_code,

1030

attribute.func_globals,

1031

attribute.func_name,

1032

attribute.func_defaults,

1033

attribute.func_closure)))

1034

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

1035

1036

1037

760

class ClientDBus(Client, DBusObjectWithProperties):

1038

761

"""A Client class using D-Bus

1039

762

1048

771

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

1049

772

1050

773

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

774

self._approvals_pending = 0

1051

775

self.bus = bus

1052

776

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

1053

777

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

1063

787

def notifychangeproperty(transform_func,

1064

788

dbus_name, type_func=lambda x: x,

1065

789

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

790

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

791

changes to DBus.

792

transform_fun: Function that takes a value and transform it to

793

DBus type.

794

dbus_name: DBus name of the variable

1072

795

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

796

to DBus

797

variant_level: DBus variant level. default: 1

1075

798

"""

1076

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

799

real_value = [None,]

1077

800

def setter(self, value):

801

old_value = real_value[0]

802

real_value[0] = value

1078

803

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)

804

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

805

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

806

variant_level)

1085

807

self.PropertyChanged(dbus.String(dbus_name),

1086

808

dbus_value)

1087

setattr(self, attrname, value)

1088

1089

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

1090

1091

809

810

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

811

812

1092

813

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1093

814

approvals_pending = notifychangeproperty(dbus.Boolean,

1094

815

"ApprovalPending",

1097

818

last_enabled = notifychangeproperty(datetime_to_dbus,

1098

819

"LastEnabled")

1099

820

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

1100

type_func = lambda checker:

1101

checker is not None)

821

type_func = lambda checker: checker is not None)

1102

822

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1103

823

"LastCheckedOK")

1104

last_checker_status = notifychangeproperty(dbus.Int16,

1105

"LastCheckerStatus")

1106

last_approval_request = notifychangeproperty(

1107

datetime_to_dbus, "LastApprovalRequest")

824

last_approval_request = notifychangeproperty(datetime_to_dbus,

825

"LastApprovalRequest")

1108

826

approved_by_default = notifychangeproperty(dbus.Boolean,

1109

827

"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)

828

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

829

type_func = _timedelta_to_milliseconds)

830

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

831

type_func = _timedelta_to_milliseconds)

1117

832

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)

833

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

834

type_func = _timedelta_to_milliseconds)

835

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

836

type_func = _timedelta_to_milliseconds)

837

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

838

type_func = _timedelta_to_milliseconds)

1128

839

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

1129

840

1130

841

del notifychangeproperty

1156

867

1157

868

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

1158

869

*args, **kwargs)

1159

870

1160

871

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

1161

872

old_checker = self.checker

1162

873

if self.checker is not None:

1172

883

return r

1173

884

1174

885

def _reset_approved(self):

1175

self.approved = None

886

self._approved = None

1176

887

return False

1177

888

1178

889

def approve(self, value=True):

1179

890

self.send_changedstate()

1180

self.approved = value

1181

gobject.timeout_add(timedelta_to_milliseconds

891

self._approved = value

892

gobject.timeout_add(_timedelta_to_milliseconds

1182

893

(self.approval_duration),

1183

894

self._reset_approved)

1184

895

1185

896

1186

897

## D-Bus methods, signals & properties

1187

_interface = "se.recompile.Mandos.Client"

898

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

1188

899

1189

900

## Signals

1190

901

1290

1001

access="readwrite")

1291

1002

def ApprovalDuration_dbus_property(self, value=None):

1292

1003

if value is None: # get

1293

return dbus.UInt64(timedelta_to_milliseconds(

1004

return dbus.UInt64(_timedelta_to_milliseconds(

1294

1005

self.approval_duration))

1295

1006

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

1296

1007

1310

1021

def Host_dbus_property(self, value=None):

1311

1022

if value is None: # get

1312

1023

return dbus.String(self.host)

1313

self.host = unicode(value)

1024

self.host = value

1314

1025

1315

1026

# Created - property

1316

1027

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

1317

1028

def Created_dbus_property(self):

1318

return datetime_to_dbus(self.created)

1029

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

1319

1030

1320

1031

# LastEnabled - property

1321

1032

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

1342

1053

return

1343

1054

return datetime_to_dbus(self.last_checked_ok)

1344

1055

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

1056

# Expires - property

1352

1057

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

1353

1058

def Expires_dbus_property(self):

1365

1070

if value is None: # get

1366

1071

return dbus.UInt64(self.timeout_milliseconds())

1367

1072

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

1073

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

1074

return

1368

1075

# Reschedule timeout

1369

if self.enabled:

1370

now = datetime.datetime.utcnow()

1371

time_to_die = timedelta_to_milliseconds(

1372

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

1373

if time_to_die <= 0:

1374

# The timeout has passed

1375

self.disable()

1376

else:

1377

self.expires = (now +

1378

datetime.timedelta(milliseconds =

1379

time_to_die))

1380

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

1381

is None):

1382

return

1383

gobject.source_remove(self.disable_initiator_tag)

1384

self.disable_initiator_tag = (gobject.timeout_add

1385

(time_to_die,

1386

self.disable))

1387

1076

gobject.source_remove(self.disable_initiator_tag)

1077

self.disable_initiator_tag = None

1078

self.expires = None

1079

time_to_die = (self.

1080

_timedelta_to_milliseconds((self

1081

.last_checked_ok

1082

+ self.timeout)

1083

- datetime.datetime

1084

.utcnow()))

1085

if time_to_die <= 0:

1086

# The timeout has passed

1087

self.disable()

1088

else:

1089

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

1090

+ datetime.timedelta(milliseconds = time_to_die))

1091

self.disable_initiator_tag = (gobject.timeout_add

1092

(time_to_die, self.disable))

1093

1388

1094

# ExtendedTimeout - property

1389

1095

@dbus_service_property(_interface, signature="t",

1390

1096

access="readwrite")

1392

1098

if value is None: # get

1393

1099

return dbus.UInt64(self.extended_timeout_milliseconds())

1394

1100

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

1395

1101

1396

1102

# Interval - property

1397

1103

@dbus_service_property(_interface, signature="t",

1398

1104

access="readwrite")

1402

1108

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

1403

1109

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

1404

1110

return

1405

if self.enabled:

1406

# Reschedule checker run

1407

gobject.source_remove(self.checker_initiator_tag)

1408

self.checker_initiator_tag = (gobject.timeout_add

1409

(value, self.start_checker))

1410

self.start_checker() # Start one now, too

1411

1111

# Reschedule checker run

1112

gobject.source_remove(self.checker_initiator_tag)

1113

self.checker_initiator_tag = (gobject.timeout_add

1114

(value, self.start_checker))

1115

self.start_checker() # Start one now, too

1116

1412

1117

# Checker - property

1413

1118

@dbus_service_property(_interface, signature="s",

1414

1119

access="readwrite")

1415

1120

def Checker_dbus_property(self, value=None):

1416

1121

if value is None: # get

1417

1122

return dbus.String(self.checker_command)

1418

self.checker_command = unicode(value)

1123

self.checker_command = value

1419

1124

1420

1125

# CheckerRunning - property

1421

1126

@dbus_service_property(_interface, signature="b",

1448

1153

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

1449

1154

if not self._pipe.recv():

1450

1155

raise KeyError()

1451

1156

1452

1157

def __getattribute__(self, name):

1453

if name == '_pipe':

1158

if(name == '_pipe'):

1454

1159

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

1455

1160

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

1456

1161

data = self._pipe.recv()

1461

1166

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

1462

1167

return self._pipe.recv()[1]

1463

1168

return func

1464

1169

1465

1170

def __setattr__(self, name, value):

1466

if name == '_pipe':

1171

if(name == '_pipe'):

1467

1172

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

1468

1173

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

1469

1174

1470

1175

1471

class ClientDBusTransitional(ClientDBus):

1472

__metaclass__ = AlternateDBusNamesMetaclass

1473

1474

1475

1176

class ClientHandler(socketserver.BaseRequestHandler, object):

1476

1177

"""A class to handle client connections.

1477

1178

1484

1185

unicode(self.client_address))

1485

1186

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

1486

1187

self.server.child_pipe.fileno())

1487

1188

1488

1189

session = (gnutls.connection

1489

1190

.ClientSession(self.request,

1490

1191

gnutls.connection

1491

1192

.X509Credentials()))

1492

1193

1493

1194

# Note: gnutls.connection.X509Credentials is really a

1494

1195

# generic GnuTLS certificate credentials object so long as

1495

1196

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

1496

1197

# here despite using OpenPGP certificates.

1497

1198

1498

1199

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

1499

1200

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

1500

1201

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

1506

1207

(gnutls.library.functions

1507

1208

.gnutls_priority_set_direct(session._c_object,

1508

1209

priority, None))

1509

1210

1510

1211

# Start communication using the Mandos protocol

1511

1212

# Get protocol number

1512

1213

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

1517

1218

except (ValueError, IndexError, RuntimeError) as error:

1518

1219

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

1519

1220

return

1520

1221

1521

1222

# Start GnuTLS connection

1522

1223

try:

1523

1224

session.handshake()

1527

1228

# established. Just abandon the request.

1528

1229

return

1529

1230

logger.debug("Handshake succeeded")

1530

1231

1531

1232

approval_required = False

1532

1233

try:

1533

1234

try:

1538

1239

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

1539

1240

return

1540

1241

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

1541

1242

1542

1243

try:

1543

1244

client = ProxyClient(child_pipe, fpr,

1544

1245

self.client_address)

1556

1257

client.name)

1557

1258

if self.server.use_dbus:

1558

1259

# Emit D-Bus signal

1559

client.Rejected("Disabled")

1260

client.Rejected("Disabled")

1560

1261

return

1561

1262

1562

if client.approved or not client.approval_delay:

1263

if client._approved or not client.approval_delay:

1563

1264

#We are approved or approval is disabled

1564

1265

break

1565

elif client.approved is None:

1266

elif client._approved is None:

1566

1267

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

1567

1268

client.name)

1568

1269

if self.server.use_dbus:

1579

1280

return

1580

1281

1581

1282

#wait until timeout or approved

1283

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

1582

1284

time = datetime.datetime.now()

1583

1285

client.changedstate.acquire()

1584

(client.changedstate.wait

1585

(float(client.timedelta_to_milliseconds(delay)

1586

/ 1000)))

1286

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

1587

1287

client.changedstate.release()

1588

1288

time2 = datetime.datetime.now()

1589

1289

if (time2 - time) >= delay:

1611

1311

sent, len(client.secret)

1612

1312

- (sent_size + sent))

1613

1313

sent_size += sent

1614

1314

1615

1315

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

1616

# bump the timeout using extended_timeout

1617

client.bump_timeout(client.extended_timeout)

1316

# bump the timeout as if seen

1317

client.checked_ok(client.extended_timeout)

1618

1318

if self.server.use_dbus:

1619

1319

# Emit D-Bus signal

1620

1320

client.GotSecret()

1687

1387

# Convert the buffer to a Python bytestring

1688

1388

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

1689

1389

# Convert the bytestring to hexadecimal notation

1690

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

1390

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

1691

1391

return hex_fpr

1692

1392

1693

1393

1696

1396

def sub_process_main(self, request, address):

1697

1397

try:

1698

1398

self.finish_request(request, address)

1699

except Exception:

1399

except:

1700

1400

self.handle_error(request, address)

1701

1401

self.close_request(request)

1702

1402

1703

1403

def process_request(self, request, address):

1704

1404

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

1705

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

1706

args = (request,

1707

address))

1708

proc.start()

1709

return proc

1710

1405

multiprocessing.Process(target = self.sub_process_main,

1406

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

1711

1407

1712

1408

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1713

1409

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

1717

1413

This function creates a new pipe in self.pipe

1718

1414

"""

1719

1415

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1720

1721

proc = MultiprocessingMixIn.process_request(self, request,

1722

client_address)

1416

1417

super(MultiprocessingMixInWithPipe,

1418

self).process_request(request, client_address)

1723

1419

self.child_pipe.close()

1724

self.add_pipe(parent_pipe, proc)

1725

1726

def add_pipe(self, parent_pipe, proc):

1420

self.add_pipe(parent_pipe)

1421

1422

def add_pipe(self, parent_pipe):

1727

1423

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

1728

1424

raise NotImplementedError

1729

1425

1730

1731

1426

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1732

1427

socketserver.TCPServer, object):

1733

1428

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

1807

1502

self.enabled = False

1808

1503

self.clients = clients

1809

1504

if self.clients is None:

1810

self.clients = {}

1505

self.clients = set()

1811

1506

self.use_dbus = use_dbus

1812

1507

self.gnutls_priority = gnutls_priority

1813

1508

IPv6_TCPServer.__init__(self, server_address,

1817

1512

def server_activate(self):

1818

1513

if self.enabled:

1819

1514

return socketserver.TCPServer.server_activate(self)

1820

1821

1515

def enable(self):

1822

1516

self.enabled = True

1823

1824

def add_pipe(self, parent_pipe, proc):

1517

def add_pipe(self, parent_pipe):

1825

1518

# Call "handle_ipc" for both data and EOF events

1826

1519

gobject.io_add_watch(parent_pipe.fileno(),

1827

1520

gobject.IO_IN | gobject.IO_HUP,

1828

1521

functools.partial(self.handle_ipc,

1829

parent_pipe =

1830

parent_pipe,

1831

proc = proc))

1832

1522

parent_pipe = parent_pipe))

1523

1833

1524

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

1834

proc = None, client_object=None):

1525

client_object=None):

1835

1526

condition_names = {

1836

1527

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

1837

1528

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

1846

1537

for cond, name in

1847

1538

condition_names.iteritems()

1848

1539

if cond & condition)

1849

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

1540

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

1850

1541

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

1851

# Wait for other process to exit

1852

proc.join()

1853

1542

return False

1854

1543

1855

1544

# Read a request from the child

1860

1549

fpr = request[1]

1861

1550

address = request[2]

1862

1551

1863

for c in self.clients.itervalues():

1552

for c in self.clients:

1864

1553

if c.fingerprint == fpr:

1865

1554

client = c

1866

1555

break

1869

1558

"dress: %s", fpr, address)

1870

1559

if self.use_dbus:

1871

1560

# Emit D-Bus signal

1872

mandos_dbus_service.ClientNotFound(fpr,

1873

address[0])

1561

mandos_dbus_service.ClientNotFound(fpr, address[0])

1874

1562

parent_pipe.send(False)

1875

1563

return False

1876

1564

1877

1565

gobject.io_add_watch(parent_pipe.fileno(),

1878

1566

gobject.IO_IN | gobject.IO_HUP,

1879

1567

functools.partial(self.handle_ipc,

1880

parent_pipe =

1881

parent_pipe,

1882

proc = proc,

1883

client_object =

1884

client))

1568

parent_pipe = parent_pipe,

1569

client_object = client))

1885

1570

parent_pipe.send(True)

1886

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

1887

# same fileno

1571

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

1888

1572

return False

1889

1573

if command == 'funcall':

1890

1574

funcname = request[1]

1891

1575

args = request[2]

1892

1576

kwargs = request[3]

1893

1577

1894

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

1895

funcname)(*args,

1896

**kwargs)))

1897

1578

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

1579

1898

1580

if command == 'getattr':

1899

1581

attrname = request[1]

1900

1582

if callable(client_object.__getattribute__(attrname)):

1901

1583

parent_pipe.send(('function',))

1902

1584

else:

1903

parent_pipe.send(('data', client_object

1904

.__getattribute__(attrname)))

1585

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

1905

1586

1906

1587

if command == 'setattr':

1907

1588

attrname = request[1]

1908

1589

value = request[2]

1909

1590

setattr(client_object, attrname, value)

1910

1591

1911

1592

return True

1912

1593

1913

1594

1950

1631

return timevalue

1951

1632

1952

1633

1634

def if_nametoindex(interface):

1635

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

1636

1637

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

1638

global if_nametoindex

1639

try:

1640

if_nametoindex = (ctypes.cdll.LoadLibrary

1641

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

1642

.if_nametoindex)

1643

except (OSError, AttributeError):

1644

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

1645

def if_nametoindex(interface):

1646

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

1647

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

1648

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

1649

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1650

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

1651

interface))

1652

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

1653

ifreq[16:20])[0]

1654

return interface_index

1655

return if_nametoindex(interface)

1656

1657

1953

1658

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

1954

1659

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

1955

1660

2010

1715

" system bus interface")

2011

1716

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

2012

1717

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

1718

options = parser.parse_args()

2020

1719

2021

1720

if options.check:

2034

1733

"use_dbus": "True",

2035

1734

"use_ipv6": "True",

2036

1735

"debuglevel": "",

2037

"restore": "True",

2038

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

2039

1736

}

2040

1737

2041

1738

# Parse config file for server-global settings

2058

1755

# options, if set.

2059

1756

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

2060

1757

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

2061

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

2062

"statedir"):

1758

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

2063

1759

value = getattr(options, option)

2064

1760

if value is not None:

2065

1761

server_settings[option] = value

2077

1773

debuglevel = server_settings["debuglevel"]

2078

1774

use_dbus = server_settings["use_dbus"]

2079

1775

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

1776

2092

1777

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

2093

1778

syslogger.setFormatter(logging.Formatter

2094

1779

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

2096

1781

% server_settings["servicename"]))

2097

1782

2098

1783

# Parse config file with clients

2099

client_config = configparser.SafeConfigParser(Client

2100

.client_defaults)

1784

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

1785

"extended_timeout": "15m",

1786

"interval": "2m",

1787

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

1788

"host": "",

1789

"approval_delay": "0s",

1790

"approval_duration": "1s",

1791

}

1792

client_config = configparser.SafeConfigParser(client_defaults)

2101

1793

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

2102

1794

"clients.conf"))

2103

1795

2141

1833

if error[0] != errno.EPERM:

2142

1834

raise error

2143

1835

1836

if not debug and not debuglevel:

1837

syslogger.setLevel(logging.WARNING)

1838

console.setLevel(logging.WARNING)

1839

if debuglevel:

1840

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

1841

syslogger.setLevel(level)

1842

console.setLevel(level)

1843

2144

1844

if debug:

2145

1845

# Enable all possible GnuTLS debugging

2146

1846

2160

1860

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

2161

1861

if null > 2:

2162

1862

os.close(null)

1863

else:

1864

# No console logging

1865

logger.removeHandler(console)

2163

1866

2164

1867

# Need to fork before connecting to D-Bus

2165

1868

if not debug:

2166

1869

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

2167

1870

daemon()

2168

1871

2169

gobject.threads_init()

2170

2171

1872

global main_loop

2172

1873

# From the Avahi example code

2173

1874

DBusGMainLoop(set_as_default=True )

2176

1877

# End of Avahi example code

2177

1878

if use_dbus:

2178

1879

try:

2179

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

1880

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

2180

1881

bus, do_not_queue=True)

2181

old_bus_name = (dbus.service.BusName

2182

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

2183

do_not_queue=True))

2184

1882

except dbus.exceptions.NameExistsException as e:

2185

1883

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

2186

1884

use_dbus = False

2187

1885

server_settings["use_dbus"] = False

2188

1886

tcp_server.use_dbus = False

2189

1887

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)

1888

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

1889

servicetype = "_mandos._tcp",

1890

protocol = protocol, bus = bus)

2194

1891

if server_settings["interface"]:

2195

1892

service.interface = (if_nametoindex

2196

1893

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

2200

1897

2201

1898

client_class = Client

2202

1899

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))

1900

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

1901

def client_config_items(config, section):

1902

special_settings = {

1903

"approved_by_default":

1904

lambda: config.getboolean(section,

1905

"approved_by_default"),

1906

}

1907

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

2272

1908

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

1909

yield (name, special_settings[name]())

1910

except KeyError:

1911

yield (name, value)

1912

1913

tcp_server.clients.update(set(

1914

client_class(name = section,

1915

config= dict(client_config_items(

1916

client_config, section)))

1917

for section in client_config.sections()))

2298

1918

if not tcp_server.clients:

2299

1919

logger.warning("No clients defined")

2300

1920

2311

1931

# "pidfile" was never created

2312

1932

pass

2313

1933

del pidfilename

1934

2314

1935

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

2315

1936

2316

1937

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

2317

1938

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

2318

1939

2321

1942

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

2322

1943

def __init__(self):

2323

1944

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

2324

_interface = "se.recompile.Mandos"

1945

_interface = "se.bsnet.fukt.Mandos"

2325

1946

2326

1947

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

2327

1948

def ClientAdded(self, objpath):

2342

1963

def GetAllClients(self):

2343

1964

"D-Bus method"

2344

1965

return dbus.Array(c.dbus_object_path

2345

for c in

2346

tcp_server.clients.itervalues())

1966

for c in tcp_server.clients)

2347

1967

2348

1968

@dbus.service.method(_interface,

2349

1969

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

2351

1971

"D-Bus method"

2352

1972

return dbus.Dictionary(

2353

1973

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

2354

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

1974

for c in tcp_server.clients),

2355

1975

signature="oa{sv}")

2356

1976

2357

1977

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

2358

1978

def RemoveClient(self, object_path):

2359

1979

"D-Bus method"

2360

for c in tcp_server.clients.itervalues():

1980

for c in tcp_server.clients:

2361

1981

if c.dbus_object_path == object_path:

2362

del tcp_server.clients[c.name]

1982

tcp_server.clients.remove(c)

2363

1983

c.remove_from_connection()

2364

1984

# Don't signal anything except ClientRemoved

2365

1985

c.disable(quiet=True)

2370

1990

2371

1991

del _interface

2372

1992

2373

class MandosDBusServiceTransitional(MandosDBusService):

2374

__metaclass__ = AlternateDBusNamesMetaclass

2375

mandos_dbus_service = MandosDBusServiceTransitional()

1993

mandos_dbus_service = MandosDBusService()

2376

1994

2377

1995

def cleanup():

2378

1996

"Cleanup function; run on exit"

2379

1997

service.cleanup()

2380

1998

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

1999

while tcp_server.clients:

2435

name, client = tcp_server.clients.popitem()

2000

client = tcp_server.clients.pop()

2436

2001

if use_dbus:

2437

2002

client.remove_from_connection()

2003

client.disable_hook = None

2438

2004

# Don't signal anything except ClientRemoved

2439

2005

client.disable(quiet=True)

2440

2006

if use_dbus:

2441

2007

# Emit D-Bus signal

2442

mandos_dbus_service.ClientRemoved(client

2443

.dbus_object_path,

2008

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2444

2009

client.name)

2445

client_settings.clear()

2446

2010

2447

2011

atexit.register(cleanup)

2448

2012

2449

for client in tcp_server.clients.itervalues():

2013

for client in tcp_server.clients:

2450

2014

if use_dbus:

2451

2015

# Emit D-Bus signal

2452

2016

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2453

# Need to initiate checking of clients

2454

if client.enabled:

2455

client.init_checker()

2017

client.enable()

2456

2018

2457

2019

tcp_server.enable()

2458

2020

tcp_server.server_activate()