/mandos/trunk : revision 525

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# along with this program. If not, see

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

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#

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

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

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#

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from __future__ import (division, absolute_import, print_function,

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import 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 = "1.3.0"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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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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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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def initlogger(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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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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class AvahiError(Exception):

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

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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

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self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

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

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self.name)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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self.remove()

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try:

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self.add()

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self.rename_count += 1

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def remove(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) 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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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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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.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]:

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logger.error(bad_states[state])

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self.remove()

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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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elif state == avahi.SERVER_RUNNING:

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self.add()

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else:

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

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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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def activate(self):

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

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if self.server is None:

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self.server_state_changed)

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

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class AvahiServiceToSyslog(AvahiService):

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def rename(self):

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

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ret = AvahiService.rename(self)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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return ret

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def timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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class Client(object):

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

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Attributes:

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

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

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

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

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

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

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checker_initiator_tag: a gobject event source tag, or None

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

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client_structure: Object describing what attributes a client has

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and is used for storing the client at exit

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current_checker_command: string; current running checker_command

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

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disable_initiator_tag: a gobject event source tag, or None

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enabled: bool()

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

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

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

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

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last_enabled: datetime.datetime(); (UTC)

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last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, or None.

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

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

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D-Bus identifiers

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

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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",

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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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@staticmethod

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def _timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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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 self._timedelta_to_milliseconds(self.timeout)

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return timedelta_to_milliseconds(self.timeout)

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def extended_timeout_milliseconds(self):

449

"Return the 'extended_timeout' attribute in milliseconds"

450

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 self._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 self._timedelta_to_milliseconds(self.approval_delay)

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

457

return timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

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def config_parser(config):

461

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

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

463

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

464

settings = {}

465

for client_name in config.sections():

466

section = dict(config.items(client_name))

467

client = settings[client_name] = {}

468

469

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

470

# Reformat values from string types to Python types

471

client["approved_by_default"] = config.getboolean(

472

client_name, "approved_by_default")

473

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

474

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

476

.replace(" ", ""))

477

if "secret" in section:

478

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

479

elif "secfile" in section:

480

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

481

(section["secfile"])),

482

"rb") as secfile:

483

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

484

else:

485

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

486

% section)

487

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

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client["extended_timeout"] = string_to_delta(

489

section["extended_timeout"])

490

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

491

client["approval_delay"] = string_to_delta(

492

section["approval_delay"])

493

client["approval_duration"] = string_to_delta(

494

section["approval_duration"])

495

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

496

client["last_approval_request"] = None

497

client["last_checked_ok"] = None

498

client["last_checker_status"] = None

499

if client["enabled"]:

500

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

501

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

502

+ client["timeout"])

503

else:

504

client["last_enabled"] = None

505

client["expires"] = None

506

507

return settings

508

509

510

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

319

511

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

320

512

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

321

513

attribute."""

322

514

self.name = name

323

if config is None:

324

config = {}

515

# adding all client settings

516

for setting, value in settings.iteritems():

517

setattr(self, setting, value)

518

325

519

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

326

520

# Uppercase and remove spaces from fingerprint for later

327

521

# comparison purposes with return value from the fingerprint()

328

522

# function

329

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

330

.replace(" ", ""))

331

523

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

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()

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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

524

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

525

526

# attributes specific for this server instance

351

527

self.checker = None

352

528

self.checker_initiator_tag = None

353

529

self.disable_initiator_tag = None

354

530

self.checker_callback_tag = None

355

self.checker_command = config["checker"]

356

531

self.current_checker_command = None

357

self.last_connect = None

358

self._approved = None

359

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

360

True)

532

self.approved = None

361

533

self.approvals_pending = 0

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())

534

self.changedstate = (multiprocessing_manager

535

.Condition(multiprocessing_manager

536

.Lock()))

537

self.client_structure = [attr for attr in

538

self.__dict__.iterkeys()

539

if not attr.startswith("_")]

540

self.client_structure.append("client_structure")

541

542

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

543

lambda obj:

544

isinstance(obj,

545

property)):

546

if not name.startswith("_"):

547

self.client_structure.append(name)

367

548

549

# Send notice to process children that client state has changed

368

550

def send_changedstate(self):

369

self.changedstate.acquire()

370

self.changedstate.notify_all()

371

self.changedstate.release()

372

551

with self.changedstate:

552

self.changedstate.notify_all()

553

373

554

def enable(self):

374

555

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

375

556

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

376

557

# Already enabled

377

558

return

378

559

self.send_changedstate()

560

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

561

self.enabled = True

379

562

self.last_enabled = datetime.datetime.utcnow()

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()

563

self.init_checker()

392

564

393

565

def disable(self, quiet=True):

394

566

"""Disable this client."""

401

573

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

402

574

gobject.source_remove(self.disable_initiator_tag)

403

575

self.disable_initiator_tag = None

576

self.expires = None

404

577

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

405

578

gobject.source_remove(self.checker_initiator_tag)

406

579

self.checker_initiator_tag = None

407

580

self.stop_checker()

408

if self.disable_hook:

409

self.disable_hook(self)

410

581

self.enabled = False

411

582

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

412

583

return False

413

584

414

585

def __del__(self):

415

self.disable_hook = None

416

586

self.disable()

417

587

588

def init_checker(self):

589

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

590

# and every interval from then on.

591

self.checker_initiator_tag = (gobject.timeout_add

592

(self.interval_milliseconds(),

593

self.start_checker))

594

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

595

self.disable_initiator_tag = (gobject.timeout_add

596

(self.timeout_milliseconds(),

597

self.disable))

598

# Also start a new checker *right now*.

599

self.start_checker()

600

418

601

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

419

602

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

420

603

self.checker_callback_tag = None

421

604

self.checker = None

422

605

if os.WIFEXITED(condition):

423

exitstatus = os.WEXITSTATUS(condition)

424

if exitstatus == 0:

606

self.last_checker_status = os.WEXITSTATUS(condition)

607

if self.last_checker_status == 0:

425

608

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

426

609

vars(self))

427

610

self.checked_ok()

429

612

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

430

613

vars(self))

431

614

else:

615

self.last_checker_status = -1

432

616

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

433

617

vars(self))

434

618

435

def checked_ok(self):

619

def checked_ok(self, timeout=None):

436

620

"""Bump up the timeout for this client.

437

621

438

622

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

439

623

alive and well.

440

624

"""

625

if timeout is None:

626

timeout = self.timeout

441

627

self.last_checked_ok = datetime.datetime.utcnow()

442

gobject.source_remove(self.disable_initiator_tag)

443

self.disable_initiator_tag = (gobject.timeout_add

444

(self.timeout_milliseconds(),

445

self.disable))

628

if self.disable_initiator_tag is not None:

629

gobject.source_remove(self.disable_initiator_tag)

630

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

631

self.disable_initiator_tag = (gobject.timeout_add

632

(timedelta_to_milliseconds

633

(timeout), self.disable))

634

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

446

635

447

636

def need_approval(self):

448

637

self.last_approval_request = datetime.datetime.utcnow()

488

677

'replace')))

489

678

for attr in

490

679

self.runtime_expansions)

491

680

492

681

try:

493

682

command = self.checker_command % escaped_attrs

494

683

except TypeError as error:

540

729

raise

541

730

self.checker = None

542

731

732

543

733

def dbus_service_property(dbus_interface, signature="v",

544

734

access="readwrite", byte_arrays=False):

545

735

"""Decorators for marking methods of a DBusObjectWithProperties to

591

781

592

782

class DBusObjectWithProperties(dbus.service.Object):

593

783

"""A D-Bus object with properties.

594

784

595

785

Classes inheriting from this can use the dbus_service_property

596

786

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

597

787

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

604

794

def _get_all_dbus_properties(self):

605

795

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

606

796

"""

607

return ((prop._dbus_name, prop)

797

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

798

for cls in self.__class__.__mro__

608

799

for name, prop in

609

inspect.getmembers(self, self._is_dbus_property))

800

inspect.getmembers(cls, self._is_dbus_property))

610

801

611

802

def _get_dbus_property(self, interface_name, property_name):

612

803

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

613

804

property with the specified name and interface.

614

805

"""

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

806

for cls in self.__class__.__mro__:

807

for name, value in (inspect.getmembers

808

(cls, self._is_dbus_property)):

809

if (value._dbus_name == property_name

810

and value._dbus_interface == interface_name):

811

return value.__get__(self)

812

625

813

# No such property

626

814

raise DBusPropertyNotFound(self.dbus_object_path + ":"

627

815

+ interface_name + "."

661

849

def GetAll(self, interface_name):

662

850

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

663

851

standard.

664

852

665

853

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

666

854

"""

667

all = {}

855

properties = {}

668

856

for name, prop in self._get_all_dbus_properties():

669

857

if (interface_name

670

858

and interface_name != prop._dbus_interface):

675

863

continue

676

864

value = prop()

677

865

if not hasattr(value, "variant_level"):

678

all[name] = value

866

properties[name] = value

679

867

continue

680

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

681

value.variant_level+1)

682

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

868

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

869

value.variant_level+1)

870

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

683

871

684

872

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

685

873

out_signature="s",

729

917

return xmlstring

730

918

731

919

920

def datetime_to_dbus (dt, variant_level=0):

921

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

922

if dt is None:

923

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

924

return dbus.String(dt.isoformat(),

925

variant_level=variant_level)

926

927

928

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

929

.__metaclass__):

930

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

931

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

932

"""

933

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

934

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

935

# methods, signals, or properties in them

936

for base in (b for b in bases

937

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

938

# Go though all attributes of the base class

939

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

940

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

941

# with the wrong interface name

942

if (not hasattr(attribute, "_dbus_interface")

943

or not attribute._dbus_interface

944

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

945

continue

946

# Create an alternate D-Bus interface name based on

947

# the current name

948

alt_interface = (attribute._dbus_interface

949

.replace("se.recompile.Mandos",

950

"se.bsnet.fukt.Mandos"))

951

# Is this a D-Bus signal?

952

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

953

# Extract the original non-method function by

954

# black magic

955

nonmethod_func = (dict(

956

zip(attribute.func_code.co_freevars,

957

attribute.__closure__))["func"]

958

.cell_contents)

959

# Create a new, but exactly alike, function

960

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

961

# with the alternate D-Bus interface name

962

new_function = (dbus.service.signal

963

(alt_interface,

964

attribute._dbus_signature)

965

(types.FunctionType(

966

nonmethod_func.func_code,

967

nonmethod_func.func_globals,

968

nonmethod_func.func_name,

969

nonmethod_func.func_defaults,

970

nonmethod_func.func_closure)))

971

# Define a creator of a function to call both the

972

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

973

# signals gets sent when the function is called

974

def fixscope(func1, func2):

975

"""This function is a scope container to pass

976

func1 and func2 to the "call_both" function

977

outside of its arguments"""

978

def call_both(*args, **kwargs):

979

"""This function will emit two D-Bus

980

signals by calling func1 and func2"""

981

func1(*args, **kwargs)

982

func2(*args, **kwargs)

983

return call_both

984

# Create the "call_both" function and add it to

985

# the class

986

attr[attrname] = fixscope(attribute,

987

new_function)

988

# Is this a D-Bus method?

989

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

990

# Create a new, but exactly alike, function

991

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

992

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

993

# to the class.

994

attr[attrname] = (dbus.service.method

995

(alt_interface,

996

attribute._dbus_in_signature,

997

attribute._dbus_out_signature)

998

(types.FunctionType

999

(attribute.func_code,

1000

attribute.func_globals,

1001

attribute.func_name,

1002

attribute.func_defaults,

1003

attribute.func_closure)))

1004

# Is this a D-Bus property?

1005

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

1006

# Create a new, but exactly alike, function

1007

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

1008

# property with the alternate D-Bus interface

1009

# name. Add it to the class.

1010

attr[attrname] = (dbus_service_property

1011

(alt_interface,

1012

attribute._dbus_signature,

1013

attribute._dbus_access,

1014

attribute

1015

._dbus_get_args_options

1016

["byte_arrays"])

1017

(types.FunctionType

1018

(attribute.func_code,

1019

attribute.func_globals,

1020

attribute.func_name,

1021

attribute.func_defaults,

1022

attribute.func_closure)))

1023

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

1024

1025

732

1026

class ClientDBus(Client, DBusObjectWithProperties):

733

1027

"""A Client class using D-Bus

734

1028

743

1037

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

744

1038

745

1039

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

746

self._approvals_pending = 0

747

1040

self.bus = bus

748

1041

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

1042

self._approvals_pending = 0

1043

1044

self._approvals_pending = 0

749

1045

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

750

1046

# the D-Bus

751

1047

client_object_name = unicode(self.name).translate(

756

1052

DBusObjectWithProperties.__init__(self, self.bus,

757

1053

self.dbus_object_path)

758

1054

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

1055

def notifychangeproperty(transform_func,

1056

dbus_name, type_func=lambda x: x,

1057

variant_level=1):

1058

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

1059

its changes to DBus.

1060

1061

transform_fun: Function that takes a value and a variant_level

1062

and transforms it to a D-Bus type.

1063

dbus_name: D-Bus name of the variable

1064

type_func: Function that transform the value before sending it

1065

to the D-Bus. Default: no transform

1066

variant_level: D-Bus variant level. Default: 1

1067

"""

1068

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

1069

def setter(self, value):

1070

if hasattr(self, "dbus_object_path"):

1071

if (not hasattr(self, attrname) or

1072

type_func(getattr(self, attrname, None))

1073

!= type_func(value)):

1074

dbus_value = transform_func(type_func(value),

1075

variant_level

1076

=variant_level)

1077

self.PropertyChanged(dbus.String(dbus_name),

1078

dbus_value)

1079

setattr(self, attrname, value)

1080

1081

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

1082

1083

1084

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1085

approvals_pending = notifychangeproperty(dbus.Boolean,

1086

"ApprovalPending",

1087

type_func = bool)

1088

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

1089

last_enabled = notifychangeproperty(datetime_to_dbus,

1090

"LastEnabled")

1091

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

1092

type_func = lambda checker:

1093

checker is not None)

1094

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1095

"LastCheckedOK")

1096

last_approval_request = notifychangeproperty(

1097

datetime_to_dbus, "LastApprovalRequest")

1098

approved_by_default = notifychangeproperty(dbus.Boolean,

1099

"ApprovedByDefault")

1100

approval_delay = notifychangeproperty(dbus.UInt64,

1101

"ApprovalDelay",

1102

type_func =

1103

timedelta_to_milliseconds)

1104

approval_duration = notifychangeproperty(

1105

dbus.UInt64, "ApprovalDuration",

1106

type_func = timedelta_to_milliseconds)

1107

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

1108

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

1109

type_func =

1110

timedelta_to_milliseconds)

1111

extended_timeout = notifychangeproperty(

1112

dbus.UInt64, "ExtendedTimeout",

1113

type_func = timedelta_to_milliseconds)

1114

interval = notifychangeproperty(dbus.UInt64,

1115

"Interval",

1116

type_func =

1117

timedelta_to_milliseconds)

1118

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

1119

1120

del notifychangeproperty

802

1121

803

1122

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

804

1123

try:

813

1132

*args, **kwargs):

814

1133

self.checker_callback_tag = None

815

1134

self.checker = None

816

# Emit D-Bus signal

817

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

818

dbus.Boolean(False, variant_level=1))

819

1135

if os.WIFEXITED(condition):

820

1136

exitstatus = os.WEXITSTATUS(condition)

821

1137

# Emit D-Bus signal

831

1147

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

832

1148

*args, **kwargs)

833

1149

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

851

1150

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

852

1151

old_checker = self.checker

853

1152

if self.checker is not None:

860

1159

and old_checker_pid != self.checker.pid):

861

1160

# Emit D-Bus signal

862

1161

self.CheckerStarted(self.current_checker_command)

863

self.PropertyChanged(

864

dbus.String("CheckerRunning"),

865

dbus.Boolean(True, variant_level=1))

866

1162

return r

867

1163

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

877

1164

def _reset_approved(self):

878

self._approved = None

1165

self.approved = None

879

1166

return False

880

1167

881

1168

def approve(self, value=True):

882

1169

self.send_changedstate()

883

self._approved = value

884

gobject.timeout_add(self._timedelta_to_milliseconds

1170

self.approved = value

1171

gobject.timeout_add(timedelta_to_milliseconds

885

1172

(self.approval_duration),

886

1173

self._reset_approved)

887

1174

888

1175

889

1176

## D-Bus methods, signals & properties

890

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

1177

_interface = "se.recompile.Mandos.Client"

891

1178

892

1179

## Signals

893

1180

930

1217

"D-Bus signal"

931

1218

return self.need_approval()

932

1219

1220

# NeRwequest - signal

1221

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

1222

def NewRequest(self, ip):

1223

"""D-Bus signal

1224

Is sent after a client request a password.

1225

"""

1226

pass

1227

933

1228

## Methods

934

1229

935

1230

# Approve - method

979

1274

if value is None: # get

980

1275

return dbus.Boolean(self.approved_by_default)

981

1276

self.approved_by_default = bool(value)

982

# Emit D-Bus signal

983

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

984

dbus.Boolean(value, variant_level=1))

985

1277

986

1278

# ApprovalDelay - property

987

1279

@dbus_service_property(_interface, signature="t",

990

1282

if value is None: # get

991

1283

return dbus.UInt64(self.approval_delay_milliseconds())

992

1284

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))

996

1285

997

1286

# ApprovalDuration - property

998

1287

@dbus_service_property(_interface, signature="t",

999

1288

access="readwrite")

1000

1289

def ApprovalDuration_dbus_property(self, value=None):

1001

1290

if value is None: # get

1002

return dbus.UInt64(self._timedelta_to_milliseconds(

1291

return dbus.UInt64(timedelta_to_milliseconds(

1003

1292

self.approval_duration))

1004

1293

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))

1008

1294

1009

1295

# Name - property

1010

1296

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

1022

1308

def Host_dbus_property(self, value=None):

1023

1309

if value is None: # get

1024

1310

return dbus.String(self.host)

1025

self.host = value

1026

# Emit D-Bus signal

1027

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

1028

dbus.String(value, variant_level=1))

1311

self.host = unicode(value)

1029

1312

1030

1313

# Created - property

1031

1314

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

1032

1315

def Created_dbus_property(self):

1033

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

1316

return datetime_to_dbus(self.created)

1034

1317

1035

1318

# LastEnabled - property

1036

1319

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

1037

1320

def LastEnabled_dbus_property(self):

1038

if self.last_enabled is None:

1039

return dbus.String("")

1040

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

1321

return datetime_to_dbus(self.last_enabled)

1041

1322

1042

1323

# Enabled - property

1043

1324

@dbus_service_property(_interface, signature="b",

1057

1338

if value is not None:

1058

1339

self.checked_ok()

1059

1340

return

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))

1341

return datetime_to_dbus(self.last_checked_ok)

1342

1343

# Expires - property

1344

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

1345

def Expires_dbus_property(self):

1346

return datetime_to_dbus(self.expires)

1064

1347

1065

1348

# LastApprovalRequest - property

1066

1349

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

1067

1350

def LastApprovalRequest_dbus_property(self):

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))

1351

return datetime_to_dbus(self.last_approval_request)

1073

1352

1074

1353

# Timeout - property

1075

1354

@dbus_service_property(_interface, signature="t",

1078

1357

if value is None: # get

1079

1358

return dbus.UInt64(self.timeout_milliseconds())

1080

1359

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))

1084

1360

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

1085

1361

return

1086

1362

# Reschedule timeout

1087

1363

gobject.source_remove(self.disable_initiator_tag)

1088

1364

self.disable_initiator_tag = None

1089

time_to_die = (self.

1090

_timedelta_to_milliseconds((self

1091

.last_checked_ok

1092

+ self.timeout)

1093

- datetime.datetime

1094

.utcnow()))

1365

self.expires = None

1366

time_to_die = timedelta_to_milliseconds((self

1367

.last_checked_ok

1368

+ self.timeout)

1369

- datetime.datetime

1370

.utcnow())

1095

1371

if time_to_die <= 0:

1096

1372

# The timeout has passed

1097

1373

self.disable()

1098

1374

else:

1375

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

1376

+ datetime.timedelta(milliseconds =

1377

time_to_die))

1099

1378

self.disable_initiator_tag = (gobject.timeout_add

1100

1379

(time_to_die, self.disable))

1101

1380

1381

# ExtendedTimeout - property

1382

@dbus_service_property(_interface, signature="t",

1383

access="readwrite")

1384

def ExtendedTimeout_dbus_property(self, value=None):

1385

if value is None: # get

1386

return dbus.UInt64(self.extended_timeout_milliseconds())

1387

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

1388

1102

1389

# Interval - property

1103

1390

@dbus_service_property(_interface, signature="t",

1104

1391

access="readwrite")

1106

1393

if value is None: # get

1107

1394

return dbus.UInt64(self.interval_milliseconds())

1108

1395

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))

1112

1396

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

1113

1397

return

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

1398

if self.enabled:

1399

# Reschedule checker run

1400

gobject.source_remove(self.checker_initiator_tag)

1401

self.checker_initiator_tag = (gobject.timeout_add

1402

(value, self.start_checker))

1403

self.start_checker() # Start one now, too

1404

1120

1405

# Checker - property

1121

1406

@dbus_service_property(_interface, signature="s",

1122

1407

access="readwrite")

1123

1408

def Checker_dbus_property(self, value=None):

1124

1409

if value is None: # get

1125

1410

return dbus.String(self.checker_command)

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))

1411

self.checker_command = unicode(value)

1131

1412

1132

1413

# CheckerRunning - property

1133

1414

@dbus_service_property(_interface, signature="b",

1160

1441

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

1161

1442

if not self._pipe.recv():

1162

1443

raise KeyError()

1163

1444

1164

1445

def __getattribute__(self, name):

1165

if(name == '_pipe'):

1446

if name == '_pipe':

1166

1447

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

1167

1448

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

1168

1449

data = self._pipe.recv()

1173

1454

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

1174

1455

return self._pipe.recv()[1]

1175

1456

return func

1176

1457

1177

1458

def __setattr__(self, name, value):

1178

if(name == '_pipe'):

1459

if name == '_pipe':

1179

1460

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

1180

1461

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

1181

1462

1182

1463

1464

class ClientDBusTransitional(ClientDBus):

1465

__metaclass__ = AlternateDBusNamesMetaclass

1466

1467

1183

1468

class ClientHandler(socketserver.BaseRequestHandler, object):

1184

1469

"""A class to handle client connections.

1185

1470

1192

1477

unicode(self.client_address))

1193

1478

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

1194

1479

self.server.child_pipe.fileno())

1195

1480

1196

1481

session = (gnutls.connection

1197

1482

.ClientSession(self.request,

1198

1483

gnutls.connection

1199

1484

.X509Credentials()))

1200

1485

1201

1486

# Note: gnutls.connection.X509Credentials is really a

1202

1487

# generic GnuTLS certificate credentials object so long as

1203

1488

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

1204

1489

# here despite using OpenPGP certificates.

1205

1490

1206

1491

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

1207

1492

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

1208

1493

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

1214

1499

(gnutls.library.functions

1215

1500

.gnutls_priority_set_direct(session._c_object,

1216

1501

priority, None))

1217

1502

1218

1503

# Start communication using the Mandos protocol

1219

1504

# Get protocol number

1220

1505

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

1225

1510

except (ValueError, IndexError, RuntimeError) as error:

1226

1511

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

1227

1512

return

1228

1513

1229

1514

# Start GnuTLS connection

1230

1515

try:

1231

1516

session.handshake()

1235

1520

# established. Just abandon the request.

1236

1521

return

1237

1522

logger.debug("Handshake succeeded")

1238

1523

1239

1524

approval_required = False

1240

1525

try:

1241

1526

try:

1246

1531

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

1247

1532

return

1248

1533

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

1249

1534

1250

1535

try:

1251

1536

client = ProxyClient(child_pipe, fpr,

1252

1537

self.client_address)

1253

1538

except KeyError:

1254

1539

return

1255

1540

1541

if self.server.use_dbus:

1542

# Emit D-Bus signal

1543

client.NewRequest(str(self.client_address))

1544

1256

1545

if client.approval_delay:

1257

1546

delay = client.approval_delay

1258

1547

client.approvals_pending += 1

1260

1549

1261

1550

while True:

1262

1551

if not client.enabled:

1263

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

1552

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

1264

1553

client.name)

1265

1554

if self.server.use_dbus:

1266

1555

# Emit D-Bus signal

1267

client.Rejected("Disabled")

1556

client.Rejected("Disabled")

1268

1557

return

1269

1558

1270

if client._approved or not client.approval_delay:

1559

if client.approved or not client.approval_delay:

1271

1560

#We are approved or approval is disabled

1272

1561

break

1273

elif client._approved is None:

1562

elif client.approved is None:

1274

1563

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

1275

1564

client.name)

1276

1565

if self.server.use_dbus:

1287

1576

return

1288

1577

1289

1578

#wait until timeout or approved

1290

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

1291

1579

time = datetime.datetime.now()

1292

1580

client.changedstate.acquire()

1293

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

1581

(client.changedstate.wait

1582

(float(client.timedelta_to_milliseconds(delay)

1583

/ 1000)))

1294

1584

client.changedstate.release()

1295

1585

time2 = datetime.datetime.now()

1296

1586

if (time2 - time) >= delay:

1318

1608

sent, len(client.secret)

1319

1609

- (sent_size + sent))

1320

1610

sent_size += sent

1321

1611

1322

1612

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

1323

# bump the timeout as if seen

1324

client.checked_ok()

1613

# bump the timeout using extended_timeout

1614

client.checked_ok(client.extended_timeout)

1325

1615

if self.server.use_dbus:

1326

1616

# Emit D-Bus signal

1327

1617

client.GotSecret()

1394

1684

# Convert the buffer to a Python bytestring

1395

1685

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

1396

1686

# Convert the bytestring to hexadecimal notation

1397

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

1687

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

1398

1688

return hex_fpr

1399

1689

1400

1690

1403

1693

def sub_process_main(self, request, address):

1404

1694

try:

1405

1695

self.finish_request(request, address)

1406

except:

1696

except Exception:

1407

1697

self.handle_error(request, address)

1408

1698

self.close_request(request)

1409

1699

1410

1700

def process_request(self, request, address):

1411

1701

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

1412

multiprocessing.Process(target = self.sub_process_main,

1413

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

1702

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

1703

args = (request,

1704

address))

1705

proc.start()

1706

return proc

1707

1414

1708

1415

1709

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1416

1710

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

1420

1714

This function creates a new pipe in self.pipe

1421

1715

"""

1422

1716

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1423

1424

super(MultiprocessingMixInWithPipe,

1425

self).process_request(request, client_address)

1717

1718

proc = MultiprocessingMixIn.process_request(self, request,

1719

client_address)

1426

1720

self.child_pipe.close()

1427

self.add_pipe(parent_pipe)

1428

1429

def add_pipe(self, parent_pipe):

1721

self.add_pipe(parent_pipe, proc)

1722

1723

def add_pipe(self, parent_pipe, proc):

1430

1724

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

1431

1725

raise NotImplementedError

1432

1726

1727

1433

1728

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1434

1729

socketserver.TCPServer, object):

1435

1730

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

1509

1804

self.enabled = False

1510

1805

self.clients = clients

1511

1806

if self.clients is None:

1512

self.clients = set()

1807

self.clients = {}

1513

1808

self.use_dbus = use_dbus

1514

1809

self.gnutls_priority = gnutls_priority

1515

1810

IPv6_TCPServer.__init__(self, server_address,

1519

1814

def server_activate(self):

1520

1815

if self.enabled:

1521

1816

return socketserver.TCPServer.server_activate(self)

1817

1522

1818

def enable(self):

1523

1819

self.enabled = True

1524

def add_pipe(self, parent_pipe):

1820

1821

def add_pipe(self, parent_pipe, proc):

1525

1822

# Call "handle_ipc" for both data and EOF events

1526

1823

gobject.io_add_watch(parent_pipe.fileno(),

1527

1824

gobject.IO_IN | gobject.IO_HUP,

1528

1825

functools.partial(self.handle_ipc,

1529

parent_pipe = parent_pipe))

1530

1826

parent_pipe =

1827

parent_pipe,

1828

proc = proc))

1829

1531

1830

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

1532

client_object=None):

1831

proc = None, client_object=None):

1533

1832

condition_names = {

1534

1833

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

1535

1834

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

1544

1843

for cond, name in

1545

1844

condition_names.iteritems()

1546

1845

if cond & condition)

1547

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

1846

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

1548

1847

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

1848

# Wait for other process to exit

1849

proc.join()

1549

1850

return False

1550

1851

1551

1852

# Read a request from the child

1556

1857

fpr = request[1]

1557

1858

address = request[2]

1558

1859

1559

for c in self.clients:

1860

for c in self.clients.itervalues():

1560

1861

if c.fingerprint == fpr:

1561

1862

client = c

1562

1863

break

1563

1864

else:

1564

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

1565

"dress: %s", fpr, address)

1865

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

1866

"dress: %s", fpr, address)

1566

1867

if self.use_dbus:

1567

1868

# Emit D-Bus signal

1568

mandos_dbus_service.ClientNotFound(fpr, address[0])

1869

mandos_dbus_service.ClientNotFound(fpr,

1870

address[0])

1569

1871

parent_pipe.send(False)

1570

1872

return False

1571

1873

1572

1874

gobject.io_add_watch(parent_pipe.fileno(),

1573

1875

gobject.IO_IN | gobject.IO_HUP,

1574

1876

functools.partial(self.handle_ipc,

1575

parent_pipe = parent_pipe,

1576

client_object = client))

1877

parent_pipe =

1878

parent_pipe,

1879

proc = proc,

1880

client_object =

1881

client))

1577

1882

parent_pipe.send(True)

1578

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

1883

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

1884

# same fileno

1579

1885

return False

1580

1886

if command == 'funcall':

1581

1887

funcname = request[1]

1582

1888

args = request[2]

1583

1889

kwargs = request[3]

1584

1890

1585

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

1586

1891

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

1892

funcname)(*args,

1893

**kwargs)))

1894

1587

1895

if command == 'getattr':

1588

1896

attrname = request[1]

1589

1897

if callable(client_object.__getattribute__(attrname)):

1590

1898

parent_pipe.send(('function',))

1591

1899

else:

1592

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

1900

parent_pipe.send(('data', client_object

1901

.__getattribute__(attrname)))

1593

1902

1594

1903

if command == 'setattr':

1595

1904

attrname = request[1]

1596

1905

value = request[2]

1597

1906

setattr(client_object, attrname, value)

1598

1907

1599

1908

return True

1600

1909

1601

1910

1638

1947

return timevalue

1639

1948

1640

1949

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

1665

1950

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

1666

1951

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

1667

1952

1722

2007

" system bus interface")

1723

2008

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

1724

2009

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

2010

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

2011

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

2012

" state")

2013

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

2014

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

2015

1725

2016

options = parser.parse_args()

1726

2017

1727

2018

if options.check:

1740

2031

"use_dbus": "True",

1741

2032

"use_ipv6": "True",

1742

2033

"debuglevel": "",

2034

"restore": "True",

2035

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

1743

2036

}

1744

2037

1745

2038

# Parse config file for server-global settings

1762

2055

# options, if set.

1763

2056

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

1764

2057

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

1765

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

2058

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

2059

"statedir"):

1766

2060

value = getattr(options, option)

1767

2061

if value is not None:

1768

2062

server_settings[option] = value

1780

2074

debuglevel = server_settings["debuglevel"]

1781

2075

use_dbus = server_settings["use_dbus"]

1782

2076

use_ipv6 = server_settings["use_ipv6"]

1783

2077

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

2078

stored_state_file)

2079

2080

if debug:

2081

initlogger(logging.DEBUG)

2082

else:

2083

if not debuglevel:

2084

initlogger()

2085

else:

2086

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

2087

initlogger(level)

2088

1784

2089

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

1785

2090

syslogger.setFormatter(logging.Formatter

1786

2091

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

1788

2093

% server_settings["servicename"]))

1789

2094

1790

2095

# Parse config file with clients

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)

2096

client_config = configparser.SafeConfigParser(Client.client_defaults)

1799

2097

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

1800

2098

"clients.conf"))

1801

2099

1839

2137

if error[0] != errno.EPERM:

1840

2138

raise error

1841

2139

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

1850

2140

if debug:

1851

2141

# Enable all possible GnuTLS debugging

1852

2142

1883

2173

# End of Avahi example code

1884

2174

if use_dbus:

1885

2175

try:

1886

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

2176

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

1887

2177

bus, do_not_queue=True)

2178

old_bus_name = (dbus.service.BusName

2179

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

2180

do_not_queue=True))

1888

2181

except dbus.exceptions.NameExistsException as e:

1889

2182

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

1890

2183

use_dbus = False

1891

2184

server_settings["use_dbus"] = False

1892

2185

tcp_server.use_dbus = False

1893

2186

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1894

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

1895

servicetype = "_mandos._tcp",

1896

protocol = protocol, bus = bus)

2187

service = AvahiServiceToSyslog(name =

2188

server_settings["servicename"],

2189

servicetype = "_mandos._tcp",

2190

protocol = protocol, bus = bus)

1897

2191

if server_settings["interface"]:

1898

2192

service.interface = (if_nametoindex

1899

2193

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

1903

2197

1904

2198

client_class = Client

1905

2199

if use_dbus:

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):

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

2220

with PGPEngine() as pgp:

2221

for client_name, client in clients_data.iteritems():

2222

# Decide which value to use after restoring saved state.

2223

# We have three different values: Old config file,

2224

# new config file, and saved state.

2225

# New config value takes precedence if it differs from old

2226

# config value, otherwise use saved state.

2227

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

2228

try:

2229

# For each value in new config, check if it

2230

# differs from the old config value (Except for

2231

# the "secret" attribute)

2232

if (name != "secret" and

2233

value != old_client_settings[client_name]

2234

[name]):

2235

client[name] = value

2236

except KeyError:

2237

pass

2238

2239

# Clients who has passed its expire date can still be

2240

# enabled if its last checker was successful. Clients

2241

# whose checker failed before we stored its state is

2242

# assumed to have failed all checkers during downtime.

2243

if client["enabled"]:

2244

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

2245

if not client["last_checked_ok"]:

2246

logger.warning(

2247

"disabling client {0} - Client never "

2248

"performed a successfull checker"

2249

.format(client["name"]))

2250

client["enabled"] = False

2251

elif client["last_checker_status"] != 0:

2252

logger.warning(

2253

"disabling client {0} - Client "

2254

"last checker failed with error code {1}"

2255

.format(client["name"],

2256

client["last_checker_status"]))

2257

client["enabled"] = False

2258

else:

2259

client["expires"] = (datetime.datetime

2260

.utcnow()

2261

+ client["timeout"])

2262

1914

2263

try:

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()))

2264

client["secret"] = (

2265

pgp.decrypt(client["encrypted_secret"],

2266

client_settings[client_name]

2267

["secret"]))

2268

except PGPError:

2269

# If decryption fails, we use secret from new settings

2270

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

2271

.format(client_name))

2272

client["secret"] = (

2273

client_settings[client_name]["secret"])

2274

2275

2276

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

2277

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

2278

del clients_data[client_name]

2279

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

2280

clients_data[client_name] = client_settings[client_name]

2281

2282

# Create clients all clients

2283

for client_name, client in clients_data.iteritems():

2284

tcp_server.clients[client_name] = client_class(

2285

name = client_name, settings = client)

2286

1924

2287

if not tcp_server.clients:

1925

2288

logger.warning("No clients defined")

1926

2289

1937

2300

# "pidfile" was never created

1938

2301

pass

1939

2302

del pidfilename

1940

1941

2303

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

1942

2304

1943

2305

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

1944

2306

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

1945

2307

1948

2310

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

1949

2311

def __init__(self):

1950

2312

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

1951

_interface = "se.bsnet.fukt.Mandos"

2313

_interface = "se.recompile.Mandos"

1952

2314

1953

2315

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

1954

2316

def ClientAdded(self, objpath):

1969

2331

def GetAllClients(self):

1970

2332

"D-Bus method"

1971

2333

return dbus.Array(c.dbus_object_path

1972

for c in tcp_server.clients)

2334

for c in

2335

tcp_server.clients.itervalues())

1973

2336

1974

2337

@dbus.service.method(_interface,

1975

2338

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

1977

2340

"D-Bus method"

1978

2341

return dbus.Dictionary(

1979

2342

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

1980

for c in tcp_server.clients),

2343

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

1981

2344

signature="oa{sv}")

1982

2345

1983

2346

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

1984

2347

def RemoveClient(self, object_path):

1985

2348

"D-Bus method"

1986

for c in tcp_server.clients:

2349

for c in tcp_server.clients.itervalues():

1987

2350

if c.dbus_object_path == object_path:

1988

tcp_server.clients.remove(c)

2351

del tcp_server.clients[c.name]

1989

2352

c.remove_from_connection()

1990

2353

# Don't signal anything except ClientRemoved

1991

2354

c.disable(quiet=True)

1996

2359

1997

2360

del _interface

1998

2361

1999

mandos_dbus_service = MandosDBusService()

2362

class MandosDBusServiceTransitional(MandosDBusService):

2363

__metaclass__ = AlternateDBusNamesMetaclass

2364

mandos_dbus_service = MandosDBusServiceTransitional()

2000

2365

2001

2366

def cleanup():

2002

2367

"Cleanup function; run on exit"

2003

2368

service.cleanup()

2004

2369

2370

multiprocessing.active_children()

2371

if not (tcp_server.clients or client_settings):

2372

return

2373

2374

# Store client before exiting. Secrets are encrypted with key

2375

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

2376

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

2377

clients = {}

2378

with PGPEngine() as pgp:

2379

for client in tcp_server.clients.itervalues():

2380

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

2381

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

2382

key)

2383

client_dict = {}

2384

2385

# A list of attributes that can not be pickled

2386

# + secret.

2387

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

2388

"checker"))

2389

for name, typ in (inspect.getmembers

2390

(dbus.service.Object)):

2391

exclude.add(name)

2392

2393

client_dict["encrypted_secret"] = (client

2394

.encrypted_secret)

2395

for attr in client.client_structure:

2396

if attr not in exclude:

2397

client_dict[attr] = getattr(client, attr)

2398

2399

clients[client.name] = client_dict

2400

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

2401

2402

try:

2403

with os.fdopen(os.open(stored_state_path,

2404

os.O_CREAT|os.O_WRONLY|os.O_TRUNC,

2405

0600), "wb") as stored_state:

2406

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

2407

except (IOError, OSError) as e:

2408

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

2409

.format(e))

2410

if e.errno not in (errno.ENOENT, errno.EACCES):

2411

raise

2412

2413

# Delete all clients, and settings from config

2005

2414

while tcp_server.clients:

2006

client = tcp_server.clients.pop()

2415

name, client = tcp_server.clients.popitem()

2007

2416

if use_dbus:

2008

2417

client.remove_from_connection()

2009

client.disable_hook = None

2010

2418

# Don't signal anything except ClientRemoved

2011

2419

client.disable(quiet=True)

2012

2420

if use_dbus:

2013

2421

# Emit D-Bus signal

2014

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2422

mandos_dbus_service.ClientRemoved(client

2423

.dbus_object_path,

2015

2424

client.name)

2425

client_settings.clear()

2016

2426

2017

2427

atexit.register(cleanup)

2018

2428

2019

for client in tcp_server.clients:

2429

for client in tcp_server.clients.itervalues():

2020

2430

if use_dbus:

2021

2431

# Emit D-Bus signal

2022

2432

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2023

client.enable()

2433

# Need to initiate checking of clients

2434

if client.enabled:

2435

client.init_checker()

2024

2436

2025

2437

tcp_server.enable()

2026

2438

tcp_server.server_activate()