/mandos/trunk : revision 482

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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 = "1.4.1"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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version = "1.3.0"

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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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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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self.rename_count += 1

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def remove(self):

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"""Derived from the Avahi example code"""

179

if self.group is not None:

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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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pass

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self.group = None

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match.remove()

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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"""Derived from the Avahi example code"""

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self.remove()

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if self.group is None:

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self.group = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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self.server.EntryGroupNew()),

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.group = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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self.server.EntryGroupNew(),

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follow_name_owner_changes=True),

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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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% unicode(error))

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def cleanup(self):

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"""Derived from the Avahi example code"""

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if self.group is not None:

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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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pass

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self.group = None

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self.remove()

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def server_state_changed(self, state, error=None):

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"""Derived from the Avahi example code"""

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avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

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if state in bad_states:

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if bad_states[state] is not None:

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if error is None:

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logger.error(bad_states[state])

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else:

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logger.error(bad_states[state] + ": %r", error)

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self.cleanup()

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if bad_states[state]:

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logger.error(bad_states[state])

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self.remove()

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elif state == avahi.SERVER_RUNNING:

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self.add()

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else:

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if error is None:

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logger.debug("Unknown state: %r", state)

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else:

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logger.debug("Unknown state: %r: %r", state, error)

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logger.debug("Unknown state: %r", state)

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def activate(self):

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"""Derived from the Avahi example code"""

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if self.server is None:

368

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self.server_state_changed)

369

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

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class AvahiServiceToSyslog(AvahiService):

372

def rename(self):

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

374

ret = AvahiService.rename(self)

375

syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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return ret

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def timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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387

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class Client(object):

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

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Attributes:

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

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

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

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

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

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

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checker_initiator_tag: a gobject event source tag, or None

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

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client_structure: Object describing what attributes a client has

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and is used for storing the client at exit

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current_checker_command: string; current running checker_command

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

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disable_initiator_tag: a gobject event source tag, or None

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enabled: bool()

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

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

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

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

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last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, or None.

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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 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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"""

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runtime_expansions = ("approval_delay", "approval_duration",

431

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

432

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

433

298

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

434

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",

441

"approved_by_default": "True",

442

"enabled": "True",

443

}

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@staticmethod

301

def _timedelta_to_milliseconds(td):

302

"Convert a datetime.timedelta() to milliseconds"

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

304

+ (td.seconds * 1000)

305

+ (td.microseconds // 1000))

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306

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def timeout_milliseconds(self):

446

308

"Return the 'timeout' attribute in milliseconds"

447

return timedelta_to_milliseconds(self.timeout)

448

449

def extended_timeout_milliseconds(self):

450

"Return the 'extended_timeout' attribute in milliseconds"

451

return timedelta_to_milliseconds(self.extended_timeout)

309

return self._timedelta_to_milliseconds(self.timeout)

452

310

453

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def interval_milliseconds(self):

454

312

"Return the 'interval' attribute in milliseconds"

455

return timedelta_to_milliseconds(self.interval)

456

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return self._timedelta_to_milliseconds(self.interval)

314

457

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def approval_delay_milliseconds(self):

458

return timedelta_to_milliseconds(self.approval_delay)

459

460

@staticmethod

461

def config_parser(config):

462

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

463

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

464

with exceptions for any special settings as defined above"""

465

settings = {}

466

for client_name in config.sections():

467

section = dict(config.items(client_name))

468

client = settings[client_name] = {}

469

470

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

471

# Reformat values from string types to Python types

472

client["approved_by_default"] = config.getboolean(

473

client_name, "approved_by_default")

474

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

475

476

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

477

.replace(" ", ""))

478

if "secret" in section:

479

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

480

elif "secfile" in section:

481

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

482

(section["secfile"])),

483

"rb") as secfile:

484

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

485

else:

486

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

487

% section)

488

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

489

client["extended_timeout"] = string_to_delta(

490

section["extended_timeout"])

491

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

492

client["approval_delay"] = string_to_delta(

493

section["approval_delay"])

494

client["approval_duration"] = string_to_delta(

495

section["approval_duration"])

496

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

497

client["last_approval_request"] = None

498

client["last_checked_ok"] = None

499

client["last_checker_status"] = None

500

if client["enabled"]:

501

client["last_enabled"] = datetime.datetime.utcnow()

502

client["expires"] = (datetime.datetime.utcnow()

503

+ client["timeout"])

504

else:

505

client["last_enabled"] = None

506

client["expires"] = None

507

508

return settings

509

510

511

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

316

return self._timedelta_to_milliseconds(self.approval_delay)

317

318

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

512

319

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

513

320

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

514

321

attribute."""

515

322

self.name = name

516

# adding all client settings

517

for setting, value in settings.iteritems():

518

setattr(self, setting, value)

519

323

if config is None:

324

config = {}

520

325

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

521

326

# Uppercase and remove spaces from fingerprint for later

522

327

# comparison purposes with return value from the fingerprint()

523

328

# function

329

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

330

.replace(" ", ""))

524

331

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

525

self.created = settings.get("created", datetime.datetime.utcnow())

526

527

# attributes specific for this server instance

332

if "secret" in config:

333

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

334

elif "secfile" in config:

335

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

336

(config["secfile"])),

337

"rb") as secfile:

338

self.secret = secfile.read()

339

else:

340

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

341

% self.name)

342

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

343

self.created = datetime.datetime.utcnow()

344

self.enabled = False

345

self.last_approval_request = None

346

self.last_enabled = None

347

self.last_checked_ok = None

348

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

349

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

350

self.disable_hook = disable_hook

528

351

self.checker = None

529

352

self.checker_initiator_tag = None

530

353

self.disable_initiator_tag = None

531

354

self.checker_callback_tag = None

355

self.checker_command = config["checker"]

532

356

self.current_checker_command = None

533

self.approved = None

357

self.last_connect = None

358

self._approved = None

359

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

360

True)

534

361

self.approvals_pending = 0

535

self.changedstate = (multiprocessing_manager

536

.Condition(multiprocessing_manager

537

.Lock()))

538

self.client_structure = [attr for attr in

539

self.__dict__.iterkeys()

540

if not attr.startswith("_")]

541

self.client_structure.append("client_structure")

542

543

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

544

lambda obj:

545

isinstance(obj,

546

property)):

547

if not name.startswith("_"):

548

self.client_structure.append(name)

362

self.approval_delay = string_to_delta(

363

config["approval_delay"])

364

self.approval_duration = string_to_delta(

365

config["approval_duration"])

366

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

549

367

550

# Send notice to process children that client state has changed

551

368

def send_changedstate(self):

552

with self.changedstate:

553

self.changedstate.notify_all()

554

369

self.changedstate.acquire()

370

self.changedstate.notify_all()

371

self.changedstate.release()

372

555

373

def enable(self):

556

374

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

557

375

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

558

376

# Already enabled

559

377

return

560

378

self.send_changedstate()

561

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

562

self.enabled = True

563

379

self.last_enabled = datetime.datetime.utcnow()

564

self.init_checker()

380

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

381

# and every interval from then on.

382

self.checker_initiator_tag = (gobject.timeout_add

383

(self.interval_milliseconds(),

384

self.start_checker))

385

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

386

self.disable_initiator_tag = (gobject.timeout_add

387

(self.timeout_milliseconds(),

388

self.disable))

389

self.enabled = True

390

# Also start a new checker *right now*.

391

self.start_checker()

565

392

566

393

def disable(self, quiet=True):

567

394

"""Disable this client."""

574

401

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

575

402

gobject.source_remove(self.disable_initiator_tag)

576

403

self.disable_initiator_tag = None

577

self.expires = None

578

404

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

579

405

gobject.source_remove(self.checker_initiator_tag)

580

406

self.checker_initiator_tag = None

581

407

self.stop_checker()

408

if self.disable_hook:

409

self.disable_hook(self)

582

410

self.enabled = False

583

411

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

584

412

return False

585

413

586

414

def __del__(self):

415

self.disable_hook = None

587

416

self.disable()

588

417

589

def init_checker(self):

590

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

591

# and every interval from then on.

592

self.checker_initiator_tag = (gobject.timeout_add

593

(self.interval_milliseconds(),

594

self.start_checker))

595

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

596

self.disable_initiator_tag = (gobject.timeout_add

597

(self.timeout_milliseconds(),

598

self.disable))

599

# Also start a new checker *right now*.

600

self.start_checker()

601

602

418

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

603

419

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

604

420

self.checker_callback_tag = None

605

421

self.checker = None

606

422

if os.WIFEXITED(condition):

607

self.last_checker_status = os.WEXITSTATUS(condition)

608

if self.last_checker_status == 0:

423

exitstatus = os.WEXITSTATUS(condition)

424

if exitstatus == 0:

609

425

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

610

426

vars(self))

611

427

self.checked_ok()

613

429

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

614

430

vars(self))

615

431

else:

616

self.last_checker_status = -1

617

432

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

618

433

vars(self))

619

434

620

def checked_ok(self, timeout=None):

435

def checked_ok(self):

621

436

"""Bump up the timeout for this client.

622

437

623

438

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

624

439

alive and well.

625

440

"""

626

if timeout is None:

627

timeout = self.timeout

628

441

self.last_checked_ok = datetime.datetime.utcnow()

629

if self.disable_initiator_tag is not None:

630

gobject.source_remove(self.disable_initiator_tag)

631

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

632

self.disable_initiator_tag = (gobject.timeout_add

633

(timedelta_to_milliseconds

634

(timeout), self.disable))

635

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

442

gobject.source_remove(self.disable_initiator_tag)

443

self.disable_initiator_tag = (gobject.timeout_add

444

(self.timeout_milliseconds(),

445

self.disable))

636

446

637

447

def need_approval(self):

638

448

self.last_approval_request = datetime.datetime.utcnow()

678

488

'replace')))

679

489

for attr in

680

490

self.runtime_expansions)

681

491

682

492

try:

683

493

command = self.checker_command % escaped_attrs

684

494

except TypeError as error:

730

540

raise

731

541

self.checker = None

732

542

733

734

543

def dbus_service_property(dbus_interface, signature="v",

735

544

access="readwrite", byte_arrays=False):

736

545

"""Decorators for marking methods of a DBusObjectWithProperties to

782

591

783

592

class DBusObjectWithProperties(dbus.service.Object):

784

593

"""A D-Bus object with properties.

785

594

786

595

Classes inheriting from this can use the dbus_service_property

787

596

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

788

597

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

795

604

def _get_all_dbus_properties(self):

796

605

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

797

606

"""

798

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

799

for cls in self.__class__.__mro__

607

return ((prop._dbus_name, prop)

800

608

for name, prop in

801

inspect.getmembers(cls, self._is_dbus_property))

609

inspect.getmembers(self, self._is_dbus_property))

802

610

803

611

def _get_dbus_property(self, interface_name, property_name):

804

612

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

805

613

property with the specified name and interface.

806

614

"""

807

for cls in self.__class__.__mro__:

808

for name, value in (inspect.getmembers

809

(cls, self._is_dbus_property)):

810

if (value._dbus_name == property_name

811

and value._dbus_interface == interface_name):

812

return value.__get__(self)

813

615

for name in (property_name,

616

property_name + "_dbus_property"):

617

prop = getattr(self, name, None)

618

if (prop is None

619

or not self._is_dbus_property(prop)

620

or prop._dbus_name != property_name

621

or (interface_name and prop._dbus_interface

622

and interface_name != prop._dbus_interface)):

623

continue

624

return prop

814

625

# No such property

815

626

raise DBusPropertyNotFound(self.dbus_object_path + ":"

816

627

+ interface_name + "."

850

661

def GetAll(self, interface_name):

851

662

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

852

663

standard.

853

664

854

665

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

855

666

"""

856

properties = {}

667

all = {}

857

668

for name, prop in self._get_all_dbus_properties():

858

669

if (interface_name

859

670

and interface_name != prop._dbus_interface):

864

675

continue

865

676

value = prop()

866

677

if not hasattr(value, "variant_level"):

867

properties[name] = value

678

all[name] = value

868

679

continue

869

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

870

value.variant_level+1)

871

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

680

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

681

value.variant_level+1)

682

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

872

683

873

684

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

874

685

out_signature="s",

918

729

return xmlstring

919

730

920

731

921

def datetime_to_dbus (dt, variant_level=0):

922

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

923

if dt is None:

924

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

925

return dbus.String(dt.isoformat(),

926

variant_level=variant_level)

927

928

929

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

930

.__metaclass__):

931

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

932

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

933

"""

934

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

935

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

936

# methods, signals, or properties in them

937

for base in (b for b in bases

938

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

939

# Go though all attributes of the base class

940

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

941

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

942

# with the wrong interface name

943

if (not hasattr(attribute, "_dbus_interface")

944

or not attribute._dbus_interface

945

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

946

continue

947

# Create an alternate D-Bus interface name based on

948

# the current name

949

alt_interface = (attribute._dbus_interface

950

.replace("se.recompile.Mandos",

951

"se.bsnet.fukt.Mandos"))

952

# Is this a D-Bus signal?

953

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

954

# Extract the original non-method function by

955

# black magic

956

nonmethod_func = (dict(

957

zip(attribute.func_code.co_freevars,

958

attribute.__closure__))["func"]

959

.cell_contents)

960

# Create a new, but exactly alike, function

961

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

962

# with the alternate D-Bus interface name

963

new_function = (dbus.service.signal

964

(alt_interface,

965

attribute._dbus_signature)

966

(types.FunctionType(

967

nonmethod_func.func_code,

968

nonmethod_func.func_globals,

969

nonmethod_func.func_name,

970

nonmethod_func.func_defaults,

971

nonmethod_func.func_closure)))

972

# Define a creator of a function to call both the

973

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

974

# signals gets sent when the function is called

975

def fixscope(func1, func2):

976

"""This function is a scope container to pass

977

func1 and func2 to the "call_both" function

978

outside of its arguments"""

979

def call_both(*args, **kwargs):

980

"""This function will emit two D-Bus

981

signals by calling func1 and func2"""

982

func1(*args, **kwargs)

983

func2(*args, **kwargs)

984

return call_both

985

# Create the "call_both" function and add it to

986

# the class

987

attr[attrname] = fixscope(attribute,

988

new_function)

989

# Is this a D-Bus method?

990

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

991

# Create a new, but exactly alike, function

992

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

993

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

994

# to the class.

995

attr[attrname] = (dbus.service.method

996

(alt_interface,

997

attribute._dbus_in_signature,

998

attribute._dbus_out_signature)

999

(types.FunctionType

1000

(attribute.func_code,

1001

attribute.func_globals,

1002

attribute.func_name,

1003

attribute.func_defaults,

1004

attribute.func_closure)))

1005

# Is this a D-Bus property?

1006

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

1007

# Create a new, but exactly alike, function

1008

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

1009

# property with the alternate D-Bus interface

1010

# name. Add it to the class.

1011

attr[attrname] = (dbus_service_property

1012

(alt_interface,

1013

attribute._dbus_signature,

1014

attribute._dbus_access,

1015

attribute

1016

._dbus_get_args_options

1017

["byte_arrays"])

1018

(types.FunctionType

1019

(attribute.func_code,

1020

attribute.func_globals,

1021

attribute.func_name,

1022

attribute.func_defaults,

1023

attribute.func_closure)))

1024

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

1025

1026

1027

732

class ClientDBus(Client, DBusObjectWithProperties):

1028

733

"""A Client class using D-Bus

1029

734

1038

743

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

1039

744

1040

745

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

746

self._approvals_pending = 0

1041

747

self.bus = bus

1042

748

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

1043

self._approvals_pending = 0

1044

1045

self._approvals_pending = 0

1046

749

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

1047

750

# the D-Bus

1048

751

client_object_name = unicode(self.name).translate(

1053

756

DBusObjectWithProperties.__init__(self, self.bus,

1054

757

self.dbus_object_path)

1055

758

1056

def notifychangeproperty(transform_func,

1057

dbus_name, type_func=lambda x: x,

1058

variant_level=1):

1059

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

1060

its changes to DBus.

1061

1062

transform_fun: Function that takes a value and a variant_level

1063

and transforms it to a D-Bus type.

1064

dbus_name: D-Bus name of the variable

1065

type_func: Function that transform the value before sending it

1066

to the D-Bus. Default: no transform

1067

variant_level: D-Bus variant level. Default: 1

1068

"""

1069

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

1070

def setter(self, value):

1071

if hasattr(self, "dbus_object_path"):

1072

if (not hasattr(self, attrname) or

1073

type_func(getattr(self, attrname, None))

1074

!= type_func(value)):

1075

dbus_value = transform_func(type_func(value),

1076

variant_level

1077

=variant_level)

1078

self.PropertyChanged(dbus.String(dbus_name),

1079

dbus_value)

1080

setattr(self, attrname, value)

1081

1082

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

1083

1084

1085

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1086

approvals_pending = notifychangeproperty(dbus.Boolean,

1087

"ApprovalPending",

1088

type_func = bool)

1089

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

1090

last_enabled = notifychangeproperty(datetime_to_dbus,

1091

"LastEnabled")

1092

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

1093

type_func = lambda checker:

1094

checker is not None)

1095

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1096

"LastCheckedOK")

1097

last_approval_request = notifychangeproperty(

1098

datetime_to_dbus, "LastApprovalRequest")

1099

approved_by_default = notifychangeproperty(dbus.Boolean,

1100

"ApprovedByDefault")

1101

approval_delay = notifychangeproperty(dbus.UInt64,

1102

"ApprovalDelay",

1103

type_func =

1104

timedelta_to_milliseconds)

1105

approval_duration = notifychangeproperty(

1106

dbus.UInt64, "ApprovalDuration",

1107

type_func = timedelta_to_milliseconds)

1108

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

1109

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

1110

type_func =

1111

timedelta_to_milliseconds)

1112

extended_timeout = notifychangeproperty(

1113

dbus.UInt64, "ExtendedTimeout",

1114

type_func = timedelta_to_milliseconds)

1115

interval = notifychangeproperty(dbus.UInt64,

1116

"Interval",

1117

type_func =

1118

timedelta_to_milliseconds)

1119

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

1120

1121

del notifychangeproperty

759

def _get_approvals_pending(self):

760

return self._approvals_pending

761

def _set_approvals_pending(self, value):

762

old_value = self._approvals_pending

763

self._approvals_pending = value

764

bval = bool(value)

765

if (hasattr(self, "dbus_object_path")

766

and bval is not bool(old_value)):

767

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

768

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

769

dbus_bool)

770

771

approvals_pending = property(_get_approvals_pending,

772

_set_approvals_pending)

773

del _get_approvals_pending, _set_approvals_pending

774

775

@staticmethod

776

def _datetime_to_dbus(dt, variant_level=0):

777

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

778

return dbus.String(dt.isoformat(),

779

variant_level=variant_level)

780

781

def enable(self):

782

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

783

r = Client.enable(self)

784

if oldstate != self.enabled:

785

# Emit D-Bus signals

786

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

787

dbus.Boolean(True, variant_level=1))

788

self.PropertyChanged(

789

dbus.String("LastEnabled"),

790

self._datetime_to_dbus(self.last_enabled,

791

variant_level=1))

792

return r

793

794

def disable(self, quiet = False):

795

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

796

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

797

if not quiet and oldstate != self.enabled:

798

# Emit D-Bus signal

799

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

800

dbus.Boolean(False, variant_level=1))

801

return r

1122

802

1123

803

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

1124

804

try:

1133

813

*args, **kwargs):

1134

814

self.checker_callback_tag = None

1135

815

self.checker = None

816

# Emit D-Bus signal

817

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

818

dbus.Boolean(False, variant_level=1))

1136

819

if os.WIFEXITED(condition):

1137

820

exitstatus = os.WEXITSTATUS(condition)

1138

821

# Emit D-Bus signal

1148

831

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

1149

832

*args, **kwargs)

1150

833

834

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

835

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

836

# Emit D-Bus signal

837

self.PropertyChanged(

838

dbus.String("LastCheckedOK"),

839

(self._datetime_to_dbus(self.last_checked_ok,

840

variant_level=1)))

841

842

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

843

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

844

# Emit D-Bus signal

845

self.PropertyChanged(

846

dbus.String("LastApprovalRequest"),

847

(self._datetime_to_dbus(self.last_approval_request,

848

variant_level=1)))

849

return r

850

1151

851

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

1152

852

old_checker = self.checker

1153

853

if self.checker is not None:

1160

860

and old_checker_pid != self.checker.pid):

1161

861

# Emit D-Bus signal

1162

862

self.CheckerStarted(self.current_checker_command)

863

self.PropertyChanged(

864

dbus.String("CheckerRunning"),

865

dbus.Boolean(True, variant_level=1))

1163

866

return r

1164

867

868

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

869

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

870

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

871

if (old_checker is not None

872

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

873

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

874

dbus.Boolean(False, variant_level=1))

875

return r

876

1165

877

def _reset_approved(self):

1166

self.approved = None

878

self._approved = None

1167

879

return False

1168

880

1169

881

def approve(self, value=True):

1170

882

self.send_changedstate()

1171

self.approved = value

1172

gobject.timeout_add(timedelta_to_milliseconds

883

self._approved = value

884

gobject.timeout_add(self._timedelta_to_milliseconds

1173

885

(self.approval_duration),

1174

886

self._reset_approved)

1175

887

1176

888

1177

889

## D-Bus methods, signals & properties

1178

_interface = "se.recompile.Mandos.Client"

890

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

1179

891

1180

892

## Signals

1181

893

1218

930

"D-Bus signal"

1219

931

return self.need_approval()

1220

932

1221

# NeRwequest - signal

1222

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

1223

def NewRequest(self, ip):

1224

"""D-Bus signal

1225

Is sent after a client request a password.

1226

"""

1227

pass

1228

1229

933

## Methods

1230

934

1231

935

# Approve - method

1275

979

if value is None: # get

1276

980

return dbus.Boolean(self.approved_by_default)

1277

981

self.approved_by_default = bool(value)

982

# Emit D-Bus signal

983

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

984

dbus.Boolean(value, variant_level=1))

1278

985

1279

986

# ApprovalDelay - property

1280

987

@dbus_service_property(_interface, signature="t",

1283

990

if value is None: # get

1284

991

return dbus.UInt64(self.approval_delay_milliseconds())

1285

992

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

993

# Emit D-Bus signal

994

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

995

dbus.UInt64(value, variant_level=1))

1286

996

1287

997

# ApprovalDuration - property

1288

998

@dbus_service_property(_interface, signature="t",

1289

999

access="readwrite")

1290

1000

def ApprovalDuration_dbus_property(self, value=None):

1291

1001

if value is None: # get

1292

return dbus.UInt64(timedelta_to_milliseconds(

1002

return dbus.UInt64(self._timedelta_to_milliseconds(

1293

1003

self.approval_duration))

1294

1004

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

1005

# Emit D-Bus signal

1006

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

1007

dbus.UInt64(value, variant_level=1))

1295

1008

1296

1009

# Name - property

1297

1010

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

1309

1022

def Host_dbus_property(self, value=None):

1310

1023

if value is None: # get

1311

1024

return dbus.String(self.host)

1312

self.host = unicode(value)

1025

self.host = value

1026

# Emit D-Bus signal

1027

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

1028

dbus.String(value, variant_level=1))

1313

1029

1314

1030

# Created - property

1315

1031

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

1316

1032

def Created_dbus_property(self):

1317

return datetime_to_dbus(self.created)

1033

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

1318

1034

1319

1035

# LastEnabled - property

1320

1036

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

1321

1037

def LastEnabled_dbus_property(self):

1322

return datetime_to_dbus(self.last_enabled)

1038

if self.last_enabled is None:

1039

return dbus.String("")

1040

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

1323

1041

1324

1042

# Enabled - property

1325

1043

@dbus_service_property(_interface, signature="b",

1339

1057

if value is not None:

1340

1058

self.checked_ok()

1341

1059

return

1342

return datetime_to_dbus(self.last_checked_ok)

1343

1344

# Expires - property

1345

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

1346

def Expires_dbus_property(self):

1347

return datetime_to_dbus(self.expires)

1060

if self.last_checked_ok is None:

1061

return dbus.String("")

1062

return dbus.String(self._datetime_to_dbus(self

1063

.last_checked_ok))

1348

1064

1349

1065

# LastApprovalRequest - property

1350

1066

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

1351

1067

def LastApprovalRequest_dbus_property(self):

1352

return datetime_to_dbus(self.last_approval_request)

1068

if self.last_approval_request is None:

1069

return dbus.String("")

1070

return dbus.String(self.

1071

_datetime_to_dbus(self

1072

.last_approval_request))

1353

1073

1354

1074

# Timeout - property

1355

1075

@dbus_service_property(_interface, signature="t",

1358

1078

if value is None: # get

1359

1079

return dbus.UInt64(self.timeout_milliseconds())

1360

1080

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

1081

# Emit D-Bus signal

1082

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

1083

dbus.UInt64(value, variant_level=1))

1361

1084

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

1362

1085

return

1363

1086

# Reschedule timeout

1364

1087

gobject.source_remove(self.disable_initiator_tag)

1365

1088

self.disable_initiator_tag = None

1366

self.expires = None

1367

time_to_die = timedelta_to_milliseconds((self

1368

.last_checked_ok

1369

+ self.timeout)

1370

- datetime.datetime

1371

.utcnow())

1089

time_to_die = (self.

1090

_timedelta_to_milliseconds((self

1091

.last_checked_ok

1092

+ self.timeout)

1093

- datetime.datetime

1094

.utcnow()))

1372

1095

if time_to_die <= 0:

1373

1096

# The timeout has passed

1374

1097

self.disable()

1375

1098

else:

1376

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

1377

+ datetime.timedelta(milliseconds =

1378

time_to_die))

1379

1099

self.disable_initiator_tag = (gobject.timeout_add

1380

1100

(time_to_die, self.disable))

1381

1101

1382

# ExtendedTimeout - property

1383

@dbus_service_property(_interface, signature="t",

1384

access="readwrite")

1385

def ExtendedTimeout_dbus_property(self, value=None):

1386

if value is None: # get

1387

return dbus.UInt64(self.extended_timeout_milliseconds())

1388

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

1389

1390

1102

# Interval - property

1391

1103

@dbus_service_property(_interface, signature="t",

1392

1104

access="readwrite")

1394

1106

if value is None: # get

1395

1107

return dbus.UInt64(self.interval_milliseconds())

1396

1108

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

1109

# Emit D-Bus signal

1110

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

1111

dbus.UInt64(value, variant_level=1))

1397

1112

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

1398

1113

return

1399

if self.enabled:

1400

# Reschedule checker run

1401

gobject.source_remove(self.checker_initiator_tag)

1402

self.checker_initiator_tag = (gobject.timeout_add

1403

(value, self.start_checker))

1404

self.start_checker() # Start one now, too

1405

1114

# Reschedule checker run

1115

gobject.source_remove(self.checker_initiator_tag)

1116

self.checker_initiator_tag = (gobject.timeout_add

1117

(value, self.start_checker))

1118

self.start_checker() # Start one now, too

1119

1406

1120

# Checker - property

1407

1121

@dbus_service_property(_interface, signature="s",

1408

1122

access="readwrite")

1409

1123

def Checker_dbus_property(self, value=None):

1410

1124

if value is None: # get

1411

1125

return dbus.String(self.checker_command)

1412

self.checker_command = unicode(value)

1126

self.checker_command = value

1127

# Emit D-Bus signal

1128

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

1129

dbus.String(self.checker_command,

1130

variant_level=1))

1413

1131

1414

1132

# CheckerRunning - property

1415

1133

@dbus_service_property(_interface, signature="b",

1442

1160

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

1443

1161

if not self._pipe.recv():

1444

1162

raise KeyError()

1445

1163

1446

1164

def __getattribute__(self, name):

1447

if name == '_pipe':

1165

if(name == '_pipe'):

1448

1166

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

1449

1167

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

1450

1168

data = self._pipe.recv()

1455

1173

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

1456

1174

return self._pipe.recv()[1]

1457

1175

return func

1458

1176

1459

1177

def __setattr__(self, name, value):

1460

if name == '_pipe':

1178

if(name == '_pipe'):

1461

1179

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

1462

1180

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

1463

1181

1464

1182

1465

class ClientDBusTransitional(ClientDBus):

1466

__metaclass__ = AlternateDBusNamesMetaclass

1467

1468

1469

1183

class ClientHandler(socketserver.BaseRequestHandler, object):

1470

1184

"""A class to handle client connections.

1471

1185

1478

1192

unicode(self.client_address))

1479

1193

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

1480

1194

self.server.child_pipe.fileno())

1481

1195

1482

1196

session = (gnutls.connection

1483

1197

.ClientSession(self.request,

1484

1198

gnutls.connection

1485

1199

.X509Credentials()))

1486

1200

1487

1201

# Note: gnutls.connection.X509Credentials is really a

1488

1202

# generic GnuTLS certificate credentials object so long as

1489

1203

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

1490

1204

# here despite using OpenPGP certificates.

1491

1205

1492

1206

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

1493

1207

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

1494

1208

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

1500

1214

(gnutls.library.functions

1501

1215

.gnutls_priority_set_direct(session._c_object,

1502

1216

priority, None))

1503

1217

1504

1218

# Start communication using the Mandos protocol

1505

1219

# Get protocol number

1506

1220

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

1511

1225

except (ValueError, IndexError, RuntimeError) as error:

1512

1226

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

1513

1227

return

1514

1228

1515

1229

# Start GnuTLS connection

1516

1230

try:

1517

1231

session.handshake()

1521

1235

# established. Just abandon the request.

1522

1236

return

1523

1237

logger.debug("Handshake succeeded")

1524

1238

1525

1239

approval_required = False

1526

1240

try:

1527

1241

try:

1532

1246

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

1533

1247

return

1534

1248

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

1535

1249

1536

1250

try:

1537

1251

client = ProxyClient(child_pipe, fpr,

1538

1252

self.client_address)

1539

1253

except KeyError:

1540

1254

return

1541

1255

1542

if self.server.use_dbus:

1543

# Emit D-Bus signal

1544

client.NewRequest(str(self.client_address))

1545

1546

1256

if client.approval_delay:

1547

1257

delay = client.approval_delay

1548

1258

client.approvals_pending += 1

1550

1260

1551

1261

while True:

1552

1262

if not client.enabled:

1553

logger.info("Client %s is disabled",

1263

logger.warning("Client %s is disabled",

1554

1264

client.name)

1555

1265

if self.server.use_dbus:

1556

1266

# Emit D-Bus signal

1557

client.Rejected("Disabled")

1267

client.Rejected("Disabled")

1558

1268

return

1559

1269

1560

if client.approved or not client.approval_delay:

1270

if client._approved or not client.approval_delay:

1561

1271

#We are approved or approval is disabled

1562

1272

break

1563

elif client.approved is None:

1273

elif client._approved is None:

1564

1274

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

1565

1275

client.name)

1566

1276

if self.server.use_dbus:

1577

1287

return

1578

1288

1579

1289

#wait until timeout or approved

1290

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

1580

1291

time = datetime.datetime.now()

1581

1292

client.changedstate.acquire()

1582

(client.changedstate.wait

1583

(float(client.timedelta_to_milliseconds(delay)

1584

/ 1000)))

1293

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

1585

1294

client.changedstate.release()

1586

1295

time2 = datetime.datetime.now()

1587

1296

if (time2 - time) >= delay:

1609

1318

sent, len(client.secret)

1610

1319

- (sent_size + sent))

1611

1320

sent_size += sent

1612

1321

1613

1322

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

1614

# bump the timeout using extended_timeout

1615

client.checked_ok(client.extended_timeout)

1323

# bump the timeout as if seen

1324

client.checked_ok()

1616

1325

if self.server.use_dbus:

1617

1326

# Emit D-Bus signal

1618

1327

client.GotSecret()

1685

1394

# Convert the buffer to a Python bytestring

1686

1395

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

1687

1396

# Convert the bytestring to hexadecimal notation

1688

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

1397

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

1689

1398

return hex_fpr

1690

1399

1691

1400

1694

1403

def sub_process_main(self, request, address):

1695

1404

try:

1696

1405

self.finish_request(request, address)

1697

except Exception:

1406

except:

1698

1407

self.handle_error(request, address)

1699

1408

self.close_request(request)

1700

1409

1701

1410

def process_request(self, request, address):

1702

1411

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

1703

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

1704

args = (request,

1705

address))

1706

proc.start()

1707

return proc

1708

1412

multiprocessing.Process(target = self.sub_process_main,

1413

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

1709

1414

1710

1415

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1711

1416

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

1715

1420

This function creates a new pipe in self.pipe

1716

1421

"""

1717

1422

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1718

1719

proc = MultiprocessingMixIn.process_request(self, request,

1720

client_address)

1423

1424

super(MultiprocessingMixInWithPipe,

1425

self).process_request(request, client_address)

1721

1426

self.child_pipe.close()

1722

self.add_pipe(parent_pipe, proc)

1723

1724

def add_pipe(self, parent_pipe, proc):

1427

self.add_pipe(parent_pipe)

1428

1429

def add_pipe(self, parent_pipe):

1725

1430

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

1726

1431

raise NotImplementedError

1727

1432

1728

1729

1433

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1730

1434

socketserver.TCPServer, object):

1731

1435

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

1805

1509

self.enabled = False

1806

1510

self.clients = clients

1807

1511

if self.clients is None:

1808

self.clients = {}

1512

self.clients = set()

1809

1513

self.use_dbus = use_dbus

1810

1514

self.gnutls_priority = gnutls_priority

1811

1515

IPv6_TCPServer.__init__(self, server_address,

1815

1519

def server_activate(self):

1816

1520

if self.enabled:

1817

1521

return socketserver.TCPServer.server_activate(self)

1818

1819

1522

def enable(self):

1820

1523

self.enabled = True

1821

1822

def add_pipe(self, parent_pipe, proc):

1524

def add_pipe(self, parent_pipe):

1823

1525

# Call "handle_ipc" for both data and EOF events

1824

1526

gobject.io_add_watch(parent_pipe.fileno(),

1825

1527

gobject.IO_IN | gobject.IO_HUP,

1826

1528

functools.partial(self.handle_ipc,

1827

parent_pipe =

1828

parent_pipe,

1829

proc = proc))

1830

1529

parent_pipe = parent_pipe))

1530

1831

1531

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

1832

proc = None, client_object=None):

1532

client_object=None):

1833

1533

condition_names = {

1834

1534

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

1835

1535

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

1844

1544

for cond, name in

1845

1545

condition_names.iteritems()

1846

1546

if cond & condition)

1847

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

1547

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

1848

1548

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

1849

# Wait for other process to exit

1850

proc.join()

1851

1549

return False

1852

1550

1853

1551

# Read a request from the child

1858

1556

fpr = request[1]

1859

1557

address = request[2]

1860

1558

1861

for c in self.clients.itervalues():

1559

for c in self.clients:

1862

1560

if c.fingerprint == fpr:

1863

1561

client = c

1864

1562

break

1865

1563

else:

1866

logger.info("Client not found for fingerprint: %s, ad"

1867

"dress: %s", fpr, address)

1564

logger.warning("Client not found for fingerprint: %s, ad"

1565

"dress: %s", fpr, address)

1868

1566

if self.use_dbus:

1869

1567

# Emit D-Bus signal

1870

mandos_dbus_service.ClientNotFound(fpr,

1871

address[0])

1568

mandos_dbus_service.ClientNotFound(fpr, address[0])

1872

1569

parent_pipe.send(False)

1873

1570

return False

1874

1571

1875

1572

gobject.io_add_watch(parent_pipe.fileno(),

1876

1573

gobject.IO_IN | gobject.IO_HUP,

1877

1574

functools.partial(self.handle_ipc,

1878

parent_pipe =

1879

parent_pipe,

1880

proc = proc,

1881

client_object =

1882

client))

1575

parent_pipe = parent_pipe,

1576

client_object = client))

1883

1577

parent_pipe.send(True)

1884

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

1885

# same fileno

1578

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

1886

1579

return False

1887

1580

if command == 'funcall':

1888

1581

funcname = request[1]

1889

1582

args = request[2]

1890

1583

kwargs = request[3]

1891

1584

1892

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

1893

funcname)(*args,

1894

**kwargs)))

1895

1585

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

1586

1896

1587

if command == 'getattr':

1897

1588

attrname = request[1]

1898

1589

if callable(client_object.__getattribute__(attrname)):

1899

1590

parent_pipe.send(('function',))

1900

1591

else:

1901

parent_pipe.send(('data', client_object

1902

.__getattribute__(attrname)))

1592

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

1903

1593

1904

1594

if command == 'setattr':

1905

1595

attrname = request[1]

1906

1596

value = request[2]

1907

1597

setattr(client_object, attrname, value)

1908

1598

1909

1599

return True

1910

1600

1911

1601

1948

1638

return timevalue

1949

1639

1950

1640

1641

def if_nametoindex(interface):

1642

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

1643

1644

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

1645

global if_nametoindex

1646

try:

1647

if_nametoindex = (ctypes.cdll.LoadLibrary

1648

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

1649

.if_nametoindex)

1650

except (OSError, AttributeError):

1651

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

1652

def if_nametoindex(interface):

1653

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

1654

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

1655

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

1656

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1657

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

1658

interface))

1659

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

1660

ifreq[16:20])[0]

1661

return interface_index

1662

return if_nametoindex(interface)

1663

1664

1951

1665

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

1952

1666

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

1953

1667

2008

1722

" system bus interface")

2009

1723

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

2010

1724

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

2011

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

2012

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

2013

" state")

2014

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

2015

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

2016

2017

1725

options = parser.parse_args()

2018

1726

2019

1727

if options.check:

2032

1740

"use_dbus": "True",

2033

1741

"use_ipv6": "True",

2034

1742

"debuglevel": "",

2035

"restore": "True",

2036

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

2037

1743

}

2038

1744

2039

1745

# Parse config file for server-global settings

2056

1762

# options, if set.

2057

1763

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

2058

1764

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

2059

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

2060

"statedir"):

1765

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

2061

1766

value = getattr(options, option)

2062

1767

if value is not None:

2063

1768

server_settings[option] = value

2075

1780

debuglevel = server_settings["debuglevel"]

2076

1781

use_dbus = server_settings["use_dbus"]

2077

1782

use_ipv6 = server_settings["use_ipv6"]

2078

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

2079

stored_state_file)

2080

2081

if debug:

2082

initlogger(debug, logging.DEBUG)

2083

else:

2084

if not debuglevel:

2085

initlogger(debug)

2086

else:

2087

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

2088

initlogger(debug, level)

2089

1783

2090

1784

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

2091

1785

syslogger.setFormatter(logging.Formatter

2092

1786

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

2094

1788

% server_settings["servicename"]))

2095

1789

2096

1790

# Parse config file with clients

2097

client_config = configparser.SafeConfigParser(Client.client_defaults)

1791

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

1792

"interval": "5m",

1793

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

1794

"host": "",

1795

"approval_delay": "0s",

1796

"approval_duration": "1s",

1797

}

1798

client_config = configparser.SafeConfigParser(client_defaults)

2098

1799

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

2099

1800

"clients.conf"))

2100

1801

2138

1839

if error[0] != errno.EPERM:

2139

1840

raise error

2140

1841

1842

if not debug and not debuglevel:

1843

syslogger.setLevel(logging.WARNING)

1844

console.setLevel(logging.WARNING)

1845

if debuglevel:

1846

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

1847

syslogger.setLevel(level)

1848

console.setLevel(level)

1849

2141

1850

if debug:

2142

1851

# Enable all possible GnuTLS debugging

2143

1852

2157

1866

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

2158

1867

if null > 2:

2159

1868

os.close(null)

1869

else:

1870

# No console logging

1871

logger.removeHandler(console)

2160

1872

2161

1873

# Need to fork before connecting to D-Bus

2162

1874

if not debug:

2163

1875

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

2164

1876

daemon()

2165

1877

2166

gobject.threads_init()

2167

2168

1878

global main_loop

2169

1879

# From the Avahi example code

2170

1880

DBusGMainLoop(set_as_default=True )

2173

1883

# End of Avahi example code

2174

1884

if use_dbus:

2175

1885

try:

2176

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

1886

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

2177

1887

bus, do_not_queue=True)

2178

old_bus_name = (dbus.service.BusName

2179

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

2180

do_not_queue=True))

2181

1888

except dbus.exceptions.NameExistsException as e:

2182

1889

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

2183

1890

use_dbus = False

2184

1891

server_settings["use_dbus"] = False

2185

1892

tcp_server.use_dbus = False

2186

1893

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2187

service = AvahiServiceToSyslog(name =

2188

server_settings["servicename"],

2189

servicetype = "_mandos._tcp",

2190

protocol = protocol, bus = bus)

1894

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

1895

servicetype = "_mandos._tcp",

1896

protocol = protocol, bus = bus)

2191

1897

if server_settings["interface"]:

2192

1898

service.interface = (if_nametoindex

2193

1899

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

2197

1903

2198

1904

client_class = Client

2199

1905

if use_dbus:

2200

client_class = functools.partial(ClientDBusTransitional,

2201

bus = bus)

2202

2203

client_settings = Client.config_parser(client_config)

2204

old_client_settings = {}

2205

clients_data = {}

2206

2207

# Get client data and settings from last running state.

2208

if server_settings["restore"]:

2209

try:

2210

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

2211

clients_data, old_client_settings = (pickle.load

2212

(stored_state))

2213

os.remove(stored_state_path)

2214

except IOError as e:

2215

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

2216

.format(e))

2217

if e.errno != errno.ENOENT:

2218

raise

2219

except EOFError as e:

2220

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

2221

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

2222

2223

with PGPEngine() as pgp:

2224

for client_name, client in clients_data.iteritems():

2225

# Decide which value to use after restoring saved state.

2226

# We have three different values: Old config file,

2227

# new config file, and saved state.

2228

# New config value takes precedence if it differs from old

2229

# config value, otherwise use saved state.

2230

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

2231

try:

2232

# For each value in new config, check if it

2233

# differs from the old config value (Except for

2234

# the "secret" attribute)

2235

if (name != "secret" and

2236

value != old_client_settings[client_name]

2237

[name]):

2238

client[name] = value

2239

except KeyError:

2240

pass

2241

2242

# Clients who has passed its expire date can still be

2243

# enabled if its last checker was successful. Clients

2244

# whose checker failed before we stored its state is

2245

# assumed to have failed all checkers during downtime.

2246

if client["enabled"]:

2247

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

2248

if not client["last_checked_ok"]:

2249

logger.warning(

2250

"disabling client {0} - Client never "

2251

"performed a successfull checker"

2252

.format(client["name"]))

2253

client["enabled"] = False

2254

elif client["last_checker_status"] != 0:

2255

logger.warning(

2256

"disabling client {0} - Client "

2257

"last checker failed with error code {1}"

2258

.format(client["name"],

2259

client["last_checker_status"]))

2260

client["enabled"] = False

2261

else:

2262

client["expires"] = (datetime.datetime

2263

.utcnow()

2264

+ client["timeout"])

2265

1906

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

1907

def client_config_items(config, section):

1908

special_settings = {

1909

"approved_by_default":

1910

lambda: config.getboolean(section,

1911

"approved_by_default"),

1912

}

1913

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

2266

1914

try:

2267

client["secret"] = (

2268

pgp.decrypt(client["encrypted_secret"],

2269

client_settings[client_name]

2270

["secret"]))

2271

except PGPError:

2272

# If decryption fails, we use secret from new settings

2273

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

2274

.format(client_name))

2275

client["secret"] = (

2276

client_settings[client_name]["secret"])

2277

2278

2279

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

2280

for client_name in set(old_client_settings) - set(client_settings):

2281

del clients_data[client_name]

2282

for client_name in set(client_settings) - set(old_client_settings):

2283

clients_data[client_name] = client_settings[client_name]

2284

2285

# Create clients all clients

2286

for client_name, client in clients_data.iteritems():

2287

tcp_server.clients[client_name] = client_class(

2288

name = client_name, settings = client)

2289

1915

yield (name, special_settings[name]())

1916

except KeyError:

1917

yield (name, value)

1918

1919

tcp_server.clients.update(set(

1920

client_class(name = section,

1921

config= dict(client_config_items(

1922

client_config, section)))

1923

for section in client_config.sections()))

2290

1924

if not tcp_server.clients:

2291

1925

logger.warning("No clients defined")

2292

1926

2303

1937

# "pidfile" was never created

2304

1938

pass

2305

1939

del pidfilename

1940

2306

1941

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

2307

1942

2308

1943

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

2309

1944

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

2310

1945

2313

1948

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

2314

1949

def __init__(self):

2315

1950

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

2316

_interface = "se.recompile.Mandos"

1951

_interface = "se.bsnet.fukt.Mandos"

2317

1952

2318

1953

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

2319

1954

def ClientAdded(self, objpath):

2334

1969

def GetAllClients(self):

2335

1970

"D-Bus method"

2336

1971

return dbus.Array(c.dbus_object_path

2337

for c in

2338

tcp_server.clients.itervalues())

1972

for c in tcp_server.clients)

2339

1973

2340

1974

@dbus.service.method(_interface,

2341

1975

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

2343

1977

"D-Bus method"

2344

1978

return dbus.Dictionary(

2345

1979

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

2346

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

1980

for c in tcp_server.clients),

2347

1981

signature="oa{sv}")

2348

1982

2349

1983

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

2350

1984

def RemoveClient(self, object_path):

2351

1985

"D-Bus method"

2352

for c in tcp_server.clients.itervalues():

1986

for c in tcp_server.clients:

2353

1987

if c.dbus_object_path == object_path:

2354

del tcp_server.clients[c.name]

1988

tcp_server.clients.remove(c)

2355

1989

c.remove_from_connection()

2356

1990

# Don't signal anything except ClientRemoved

2357

1991

c.disable(quiet=True)

2362

1996

2363

1997

del _interface

2364

1998

2365

class MandosDBusServiceTransitional(MandosDBusService):

2366

__metaclass__ = AlternateDBusNamesMetaclass

2367

mandos_dbus_service = MandosDBusServiceTransitional()

1999

mandos_dbus_service = MandosDBusService()

2368

2000

2369

2001

def cleanup():

2370

2002

"Cleanup function; run on exit"

2371

2003

service.cleanup()

2372

2004

2373

multiprocessing.active_children()

2374

if not (tcp_server.clients or client_settings):

2375

return

2376

2377

# Store client before exiting. Secrets are encrypted with key

2378

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

2379

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

2380

clients = {}

2381

with PGPEngine() as pgp:

2382

for client in tcp_server.clients.itervalues():

2383

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

2384

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

2385

key)

2386

client_dict = {}

2387

2388

# A list of attributes that can not be pickled

2389

# + secret.

2390

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

2391

"checker"))

2392

for name, typ in (inspect.getmembers

2393

(dbus.service.Object)):

2394

exclude.add(name)

2395

2396

client_dict["encrypted_secret"] = (client

2397

.encrypted_secret)

2398

for attr in client.client_structure:

2399

if attr not in exclude:

2400

client_dict[attr] = getattr(client, attr)

2401

2402

clients[client.name] = client_dict

2403

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

2404

2405

try:

2406

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

2407

prefix="clients-",

2408

dir=os.path.dirname

2409

(stored_state_path))

2410

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

2411

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

2412

os.rename(tempname, stored_state_path)

2413

except (IOError, OSError) as e:

2414

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

2415

.format(e))

2416

if not debug:

2417

try:

2418

os.remove(tempname)

2419

except NameError:

2420

pass

2421

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

2422

errno.EEXIST)):

2423

raise e

2424

2425

# Delete all clients, and settings from config

2426

2005

while tcp_server.clients:

2427

name, client = tcp_server.clients.popitem()

2006

client = tcp_server.clients.pop()

2428

2007

if use_dbus:

2429

2008

client.remove_from_connection()

2009

client.disable_hook = None

2430

2010

# Don't signal anything except ClientRemoved

2431

2011

client.disable(quiet=True)

2432

2012

if use_dbus:

2433

2013

# Emit D-Bus signal

2434

mandos_dbus_service.ClientRemoved(client

2435

.dbus_object_path,

2014

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2436

2015

client.name)

2437

client_settings.clear()

2438

2016

2439

2017

atexit.register(cleanup)

2440

2018

2441

for client in tcp_server.clients.itervalues():

2019

for client in tcp_server.clients:

2442

2020

if use_dbus:

2443

2021

# Emit D-Bus signal

2444

2022

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2445

# Need to initiate checking of clients

2446

if client.enabled:

2447

client.init_checker()

2023

client.enable()

2448

2024

2449

2025

tcp_server.enable()

2450

2026

tcp_server.server_activate()