/mandos/release : revision 295

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

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#

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# Everything else is

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#

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

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

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# along with this program. If not, see

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

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#

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

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

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#

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from __future__ import (division, absolute_import, print_function,

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import 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 = "1.3.1"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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version = "1.5.2"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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

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"""init logger and add loglevel"""

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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

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pass

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class PGPEngine(object):

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

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def __init__(self):

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self.gnupg = GnuPGInterface.GnuPG()

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

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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

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'--quiet',

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'--no-use-agent'])

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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def encrypt(self, data, password):

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

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with open(os.devnull) as devnull:

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try:

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proc = self.gnupg.run(['--symmetric'],

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create_fhs=['stdin', 'stdout'],

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attach_fhs={'stderr': devnull})

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with contextlib.closing(proc.handles['stdin']) as f:

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f.write(data)

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with contextlib.closing(proc.handles['stdout']) as f:

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return ciphertext

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def decrypt(self, data, password):

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

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with open(os.devnull) as devnull:

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try:

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proc = self.gnupg.run(['--decrypt'],

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create_fhs=['stdin', 'stdout'],

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attach_fhs={'stderr': devnull})

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with contextlib.closing(proc.handles['stdin'] ) as f:

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f.write(data)

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with contextlib.closing(proc.handles['stdout']) as f:

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decrypted_plaintext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return decrypted_plaintext

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class AvahiError(Exception):

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

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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

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self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

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

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self.name)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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self.remove()

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try:

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self.add()

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self .entry_group_state_changed))

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'StateChanged', self.entry_group_state_changed))

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logger.debug("Adding Zeroconf service '%s' of type '%s' ...",

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self.name, self.type)

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self.group.AddService(

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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException) as e:

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dbus.exceptions.DBusException):

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pass

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self.group = None

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self.remove()

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self.server_state_changed)

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

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class AvahiServiceToSyslog(AvahiService):

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def rename(self):

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

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ret = AvahiService.rename(self)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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return ret

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def timedelta_to_milliseconds(td):

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"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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extended_timeout: extra long timeout when secret has been sent

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runtime_expansions: Allowed attributes for runtime expansion.

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

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disabled, or None

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

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

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

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@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):

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"Return the 'extended_timeout' attribute in milliseconds"

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return self._timedelta_to_milliseconds(self.extended_timeout)

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return timedelta_to_milliseconds(self.extended_timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return 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):

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return timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

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def config_parser(config):

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

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

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with exceptions for any special settings as defined above.

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

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value given the same arguments.

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"""

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settings = {}

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for client_name in config.sections():

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section = dict(config.items(client_name))

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client = settings[client_name] = {}

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

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# Reformat values from string types to Python types

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client["approved_by_default"] = config.getboolean(

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client_name, "approved_by_default")

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

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"enabled")

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

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.replace(" ", ""))

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if "secret" in section:

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

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elif "secfile" in section:

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

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(section["secfile"])),

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"rb") as secfile:

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

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else:

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

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% section)

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

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client["extended_timeout"] = string_to_delta(

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section["extended_timeout"])

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

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client["approval_delay"] = string_to_delta(

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section["approval_delay"])

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client["approval_duration"] = string_to_delta(

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section["approval_duration"])

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

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client["last_approval_request"] = None

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client["last_checked_ok"] = None

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client["last_checker_status"] = None

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return settings

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

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

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

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attribute."""

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self.name = name

338

if config is None:

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config = {}

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# adding all client settings

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for setting, value in settings.iteritems():

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setattr(self, setting, value)

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if self.enabled:

519

if not hasattr(self, "last_enabled"):

520

self.last_enabled = datetime.datetime.utcnow()

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if not hasattr(self, "expires"):

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

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+ self.timeout)

524

else:

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self.last_enabled = None

526

self.expires = None

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

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# Uppercase and remove spaces from fingerprint for later

342

530

# comparison purposes with return value from the fingerprint()

343

531

# function

344

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

345

.replace(" ", ""))

346

532

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

347

if "secret" in config:

348

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

349

elif "secfile" in config:

350

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

351

(config["secfile"])),

352

"rb") as secfile:

353

self.secret = secfile.read()

354

else:

355

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

356

% self.name)

357

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

358

self.created = datetime.datetime.utcnow()

359

self.enabled = False

360

self.last_approval_request = None

361

self.last_enabled = None

362

self.last_checked_ok = None

363

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

364

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

365

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

366

self.disable_hook = disable_hook

533

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

534

datetime.datetime.utcnow())

535

536

# attributes specific for this server instance

367

537

self.checker = None

368

538

self.checker_initiator_tag = None

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539

self.disable_initiator_tag = None

370

self.expires = None

371

540

self.checker_callback_tag = None

372

self.checker_command = config["checker"]

373

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self.current_checker_command = None

374

self.last_connect = None

375

self._approved = None

376

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

377

True)

542

self.approved = None

378

543

self.approvals_pending = 0

379

self.approval_delay = string_to_delta(

380

config["approval_delay"])

381

self.approval_duration = string_to_delta(

382

config["approval_duration"])

383

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

544

self.changedstate = (multiprocessing_manager

545

.Condition(multiprocessing_manager

546

.Lock()))

547

self.client_structure = [attr for attr in

548

self.__dict__.iterkeys()

549

if not attr.startswith("_")]

550

self.client_structure.append("client_structure")

551

552

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

553

lambda obj:

554

isinstance(obj,

555

property)):

556

if not name.startswith("_"):

557

self.client_structure.append(name)

384

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559

# Send notice to process children that client state has changed

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def send_changedstate(self):

386

self.changedstate.acquire()

387

self.changedstate.notify_all()

388

self.changedstate.release()

389

561

with self.changedstate:

562

self.changedstate.notify_all()

563

390

564

def enable(self):

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565

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

392

566

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

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567

# Already enabled

394

568

return

395

569

self.send_changedstate()

570

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

571

self.enabled = True

396

572

self.last_enabled = datetime.datetime.utcnow()

397

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

398

# and every interval from then on.

399

self.checker_initiator_tag = (gobject.timeout_add

400

(self.interval_milliseconds(),

401

self.start_checker))

402

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

403

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

404

self.disable_initiator_tag = (gobject.timeout_add

405

(self.timeout_milliseconds(),

406

self.disable))

407

self.enabled = True

408

# Also start a new checker *right now*.

409

self.start_checker()

573

self.init_checker()

410

574

411

575

def disable(self, quiet=True):

412

576

"""Disable this client."""

424

588

gobject.source_remove(self.checker_initiator_tag)

425

589

self.checker_initiator_tag = None

426

590

self.stop_checker()

427

if self.disable_hook:

428

self.disable_hook(self)

429

591

self.enabled = False

430

592

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

431

593

return False

432

594

433

595

def __del__(self):

434

self.disable_hook = None

435

596

self.disable()

436

597

598

def init_checker(self):

599

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

600

# and every interval from then on.

601

self.checker_initiator_tag = (gobject.timeout_add

602

(self.interval_milliseconds(),

603

self.start_checker))

604

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

605

self.disable_initiator_tag = (gobject.timeout_add

606

(self.timeout_milliseconds(),

607

self.disable))

608

# Also start a new checker *right now*.

609

self.start_checker()

610

437

611

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

438

612

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

439

613

self.checker_callback_tag = None

440

614

self.checker = None

441

615

if os.WIFEXITED(condition):

442

exitstatus = os.WEXITSTATUS(condition)

443

if exitstatus == 0:

616

self.last_checker_status = os.WEXITSTATUS(condition)

617

if self.last_checker_status == 0:

444

618

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

445

619

vars(self))

446

620

self.checked_ok()

448

622

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

449

623

vars(self))

450

624

else:

625

self.last_checker_status = -1

451

626

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

452

627

vars(self))

453

628

460

635

if timeout is None:

461

636

timeout = self.timeout

462

637

self.last_checked_ok = datetime.datetime.utcnow()

463

gobject.source_remove(self.disable_initiator_tag)

464

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

465

self.disable_initiator_tag = (gobject.timeout_add

466

(self._timedelta_to_milliseconds(timeout),

467

self.disable))

638

if self.disable_initiator_tag is not None:

639

gobject.source_remove(self.disable_initiator_tag)

640

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

641

self.disable_initiator_tag = (gobject.timeout_add

642

(timedelta_to_milliseconds

643

(timeout), self.disable))

644

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

468

645

469

646

def need_approval(self):

470

647

self.last_approval_request = datetime.datetime.utcnow()

510

687

'replace')))

511

688

for attr in

512

689

self.runtime_expansions)

513

690

514

691

try:

515

692

command = self.checker_command % escaped_attrs

516

693

except TypeError as error:

562

739

raise

563

740

self.checker = None

564

741

742

565

743

def dbus_service_property(dbus_interface, signature="v",

566

744

access="readwrite", byte_arrays=False):

567

745

"""Decorators for marking methods of a DBusObjectWithProperties to

613

791

614

792

class DBusObjectWithProperties(dbus.service.Object):

615

793

"""A D-Bus object with properties.

616

794

617

795

Classes inheriting from this can use the dbus_service_property

618

796

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

619

797

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

626

804

def _get_all_dbus_properties(self):

627

805

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

628

806

"""

629

return ((prop._dbus_name, prop)

807

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

808

for cls in self.__class__.__mro__

630

809

for name, prop in

631

inspect.getmembers(self, self._is_dbus_property))

810

inspect.getmembers(cls, self._is_dbus_property))

632

811

633

812

def _get_dbus_property(self, interface_name, property_name):

634

813

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

635

814

property with the specified name and interface.

636

815

"""

637

for name in (property_name,

638

property_name + "_dbus_property"):

639

prop = getattr(self, name, None)

640

if (prop is None

641

or not self._is_dbus_property(prop)

642

or prop._dbus_name != property_name

643

or (interface_name and prop._dbus_interface

644

and interface_name != prop._dbus_interface)):

645

continue

646

return prop

816

for cls in self.__class__.__mro__:

817

for name, value in (inspect.getmembers

818

(cls, self._is_dbus_property)):

819

if (value._dbus_name == property_name

820

and value._dbus_interface == interface_name):

821

return value.__get__(self)

822

647

823

# No such property

648

824

raise DBusPropertyNotFound(self.dbus_object_path + ":"

649

825

+ interface_name + "."

674

850

# signatures other than "ay".

675

851

if prop._dbus_signature != "ay":

676

852

raise ValueError

677

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

678

for byte in value))

853

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

854

for byte in value))

679

855

prop(value)

680

856

681

857

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

683

859

def GetAll(self, interface_name):

684

860

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

685

861

standard.

686

862

687

863

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

688

864

"""

689

all = {}

865

properties = {}

690

866

for name, prop in self._get_all_dbus_properties():

691

867

if (interface_name

692

868

and interface_name != prop._dbus_interface):

697

873

continue

698

874

value = prop()

699

875

if not hasattr(value, "variant_level"):

700

all[name] = value

876

properties[name] = value

701

877

continue

702

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

703

value.variant_level+1)

704

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

878

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

879

value.variant_level+1)

880

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

705

881

706

882

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

707

883

out_signature="s",

751

927

return xmlstring

752

928

753

929

930

def datetime_to_dbus (dt, variant_level=0):

931

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

932

if dt is None:

933

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

934

return dbus.String(dt.isoformat(),

935

variant_level=variant_level)

936

937

938

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

939

.__metaclass__):

940

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

941

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

942

"""

943

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

944

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

945

# methods, signals, or properties in them

946

for base in (b for b in bases

947

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

948

# Go though all attributes of the base class

949

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

950

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

951

# with the wrong interface name

952

if (not hasattr(attribute, "_dbus_interface")

953

or not attribute._dbus_interface

954

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

955

continue

956

# Create an alternate D-Bus interface name based on

957

# the current name

958

alt_interface = (attribute._dbus_interface

959

.replace("se.recompile.Mandos",

960

"se.bsnet.fukt.Mandos"))

961

# Is this a D-Bus signal?

962

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

963

# Extract the original non-method function by

964

# black magic

965

nonmethod_func = (dict(

966

zip(attribute.func_code.co_freevars,

967

attribute.__closure__))["func"]

968

.cell_contents)

969

# Create a new, but exactly alike, function

970

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

971

# with the alternate D-Bus interface name

972

new_function = (dbus.service.signal

973

(alt_interface,

974

attribute._dbus_signature)

975

(types.FunctionType(

976

nonmethod_func.func_code,

977

nonmethod_func.func_globals,

978

nonmethod_func.func_name,

979

nonmethod_func.func_defaults,

980

nonmethod_func.func_closure)))

981

# Define a creator of a function to call both the

982

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

983

# signals gets sent when the function is called

984

def fixscope(func1, func2):

985

"""This function is a scope container to pass

986

func1 and func2 to the "call_both" function

987

outside of its arguments"""

988

def call_both(*args, **kwargs):

989

"""This function will emit two D-Bus

990

signals by calling func1 and func2"""

991

func1(*args, **kwargs)

992

func2(*args, **kwargs)

993

return call_both

994

# Create the "call_both" function and add it to

995

# the class

996

attr[attrname] = fixscope(attribute,

997

new_function)

998

# Is this a D-Bus method?

999

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

1000

# Create a new, but exactly alike, function

1001

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

1002

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

1003

# to the class.

1004

attr[attrname] = (dbus.service.method

1005

(alt_interface,

1006

attribute._dbus_in_signature,

1007

attribute._dbus_out_signature)

1008

(types.FunctionType

1009

(attribute.func_code,

1010

attribute.func_globals,

1011

attribute.func_name,

1012

attribute.func_defaults,

1013

attribute.func_closure)))

1014

# Is this a D-Bus property?

1015

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

1016

# Create a new, but exactly alike, function

1017

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

1018

# property with the alternate D-Bus interface

1019

# name. Add it to the class.

1020

attr[attrname] = (dbus_service_property

1021

(alt_interface,

1022

attribute._dbus_signature,

1023

attribute._dbus_access,

1024

attribute

1025

._dbus_get_args_options

1026

["byte_arrays"])

1027

(types.FunctionType

1028

(attribute.func_code,

1029

attribute.func_globals,

1030

attribute.func_name,

1031

attribute.func_defaults,

1032

attribute.func_closure)))

1033

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

1034

1035

754

1036

class ClientDBus(Client, DBusObjectWithProperties):

755

1037

"""A Client class using D-Bus

756

1038

765

1047

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

766

1048

767

1049

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

768

self._approvals_pending = 0

769

1050

self.bus = bus

770

1051

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

771

1052

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

777

1058

("/clients/" + client_object_name))

778

1059

DBusObjectWithProperties.__init__(self, self.bus,

779

1060

self.dbus_object_path)

780

def _set_expires(self, value):

781

old_value = getattr(self, "_expires", None)

782

self._expires = value

783

if hasattr(self, "dbus_object_path") and old_value != value:

784

dbus_time = (self._datetime_to_dbus(self._expires,

785

variant_level=1))

786

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

787

dbus_time)

788

expires = property(lambda self: self._expires, _set_expires)

789

del _set_expires

790

791

def _get_approvals_pending(self):

792

return self._approvals_pending

793

def _set_approvals_pending(self, value):

794

old_value = self._approvals_pending

795

self._approvals_pending = value

796

bval = bool(value)

797

if (hasattr(self, "dbus_object_path")

798

and bval is not bool(old_value)):

799

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

800

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

801

dbus_bool)

802

803

approvals_pending = property(_get_approvals_pending,

804

_set_approvals_pending)

805

del _get_approvals_pending, _set_approvals_pending

806

807

@staticmethod

808

def _datetime_to_dbus(dt, variant_level=0):

809

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

810

if dt is None:

811

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

812

return dbus.String(dt.isoformat(),

813

variant_level=variant_level)

814

815

def enable(self):

816

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

817

r = Client.enable(self)

818

if oldstate != self.enabled:

819

# Emit D-Bus signals

820

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

821

dbus.Boolean(True, variant_level=1))

822

self.PropertyChanged(

823

dbus.String("LastEnabled"),

824

self._datetime_to_dbus(self.last_enabled,

825

variant_level=1))

826

return r

827

828

def disable(self, quiet = False):

829

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

830

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

831

if not quiet and oldstate != self.enabled:

832

# Emit D-Bus signal

833

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

834

dbus.Boolean(False, variant_level=1))

835

return r

1061

1062

def notifychangeproperty(transform_func,

1063

dbus_name, type_func=lambda x: x,

1064

variant_level=1):

1065

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

1066

its changes to DBus.

1067

1068

transform_fun: Function that takes a value and a variant_level

1069

and transforms it to a D-Bus type.

1070

dbus_name: D-Bus name of the variable

1071

type_func: Function that transform the value before sending it

1072

to the D-Bus. Default: no transform

1073

variant_level: D-Bus variant level. Default: 1

1074

"""

1075

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

1076

def setter(self, value):

1077

if hasattr(self, "dbus_object_path"):

1078

if (not hasattr(self, attrname) or

1079

type_func(getattr(self, attrname, None))

1080

!= type_func(value)):

1081

dbus_value = transform_func(type_func(value),

1082

variant_level

1083

=variant_level)

1084

self.PropertyChanged(dbus.String(dbus_name),

1085

dbus_value)

1086

setattr(self, attrname, value)

1087

1088

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

1089

1090

1091

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1092

approvals_pending = notifychangeproperty(dbus.Boolean,

1093

"ApprovalPending",

1094

type_func = bool)

1095

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

1096

last_enabled = notifychangeproperty(datetime_to_dbus,

1097

"LastEnabled")

1098

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

1099

type_func = lambda checker:

1100

checker is not None)

1101

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1102

"LastCheckedOK")

1103

last_approval_request = notifychangeproperty(

1104

datetime_to_dbus, "LastApprovalRequest")

1105

approved_by_default = notifychangeproperty(dbus.Boolean,

1106

"ApprovedByDefault")

1107

approval_delay = notifychangeproperty(dbus.UInt64,

1108

"ApprovalDelay",

1109

type_func =

1110

timedelta_to_milliseconds)

1111

approval_duration = notifychangeproperty(

1112

dbus.UInt64, "ApprovalDuration",

1113

type_func = timedelta_to_milliseconds)

1114

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

1115

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

1116

type_func =

1117

timedelta_to_milliseconds)

1118

extended_timeout = notifychangeproperty(

1119

dbus.UInt64, "ExtendedTimeout",

1120

type_func = timedelta_to_milliseconds)

1121

interval = notifychangeproperty(dbus.UInt64,

1122

"Interval",

1123

type_func =

1124

timedelta_to_milliseconds)

1125

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

1126

1127

del notifychangeproperty

836

1128

837

1129

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

838

1130

try:

847

1139

*args, **kwargs):

848

1140

self.checker_callback_tag = None

849

1141

self.checker = None

850

# Emit D-Bus signal

851

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

852

dbus.Boolean(False, variant_level=1))

853

1142

if os.WIFEXITED(condition):

854

1143

exitstatus = os.WEXITSTATUS(condition)

855

1144

# Emit D-Bus signal

865

1154

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

866

1155

*args, **kwargs)

867

1156

868

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

869

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

870

# Emit D-Bus signal

871

self.PropertyChanged(

872

dbus.String("LastCheckedOK"),

873

(self._datetime_to_dbus(self.last_checked_ok,

874

variant_level=1)))

875

876

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

877

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

878

# Emit D-Bus signal

879

self.PropertyChanged(

880

dbus.String("LastApprovalRequest"),

881

(self._datetime_to_dbus(self.last_approval_request,

882

variant_level=1)))

883

return r

884

885

1157

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

886

1158

old_checker = self.checker

887

1159

if self.checker is not None:

894

1166

and old_checker_pid != self.checker.pid):

895

1167

# Emit D-Bus signal

896

1168

self.CheckerStarted(self.current_checker_command)

897

self.PropertyChanged(

898

dbus.String("CheckerRunning"),

899

dbus.Boolean(True, variant_level=1))

900

1169

return r

901

1170

902

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

903

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

904

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

905

if (old_checker is not None

906

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

907

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

908

dbus.Boolean(False, variant_level=1))

909

return r

910

911

1171

def _reset_approved(self):

912

self._approved = None

1172

self.approved = None

913

1173

return False

914

1174

915

1175

def approve(self, value=True):

916

1176

self.send_changedstate()

917

self._approved = value

918

gobject.timeout_add(self._timedelta_to_milliseconds

1177

self.approved = value

1178

gobject.timeout_add(timedelta_to_milliseconds

919

1179

(self.approval_duration),

920

1180

self._reset_approved)

921

1181

922

1182

923

1183

## D-Bus methods, signals & properties

924

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

1184

_interface = "se.recompile.Mandos.Client"

925

1185

926

1186

## Signals

927

1187

1012

1272

def ApprovedByDefault_dbus_property(self, value=None):

1013

1273

if value is None: # get

1014

1274

return dbus.Boolean(self.approved_by_default)

1015

old_value = self.approved_by_default

1016

1275

self.approved_by_default = bool(value)

1017

# Emit D-Bus signal

1018

if old_value != self.approved_by_default:

1019

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

1020

dbus.Boolean(value, variant_level=1))

1021

1276

1022

1277

# ApprovalDelay - property

1023

1278

@dbus_service_property(_interface, signature="t",

1025

1280

def ApprovalDelay_dbus_property(self, value=None):

1026

1281

if value is None: # get

1027

1282

return dbus.UInt64(self.approval_delay_milliseconds())

1028

old_value = self.approval_delay

1029

1283

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

1030

# Emit D-Bus signal

1031

if old_value != self.approval_delay:

1032

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

1033

dbus.UInt64(value, variant_level=1))

1034

1284

1035

1285

# ApprovalDuration - property

1036

1286

@dbus_service_property(_interface, signature="t",

1037

1287

access="readwrite")

1038

1288

def ApprovalDuration_dbus_property(self, value=None):

1039

1289

if value is None: # get

1040

return dbus.UInt64(self._timedelta_to_milliseconds(

1290

return dbus.UInt64(timedelta_to_milliseconds(

1041

1291

self.approval_duration))

1042

old_value = self.approval_duration

1043

1292

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

1044

# Emit D-Bus signal

1045

if old_value != self.approval_duration:

1046

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

1047

dbus.UInt64(value, variant_level=1))

1048

1293

1049

1294

# Name - property

1050

1295

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

1062

1307

def Host_dbus_property(self, value=None):

1063

1308

if value is None: # get

1064

1309

return dbus.String(self.host)

1065

old_value = self.host

1066

self.host = value

1067

# Emit D-Bus signal

1068

if old_value != self.host:

1069

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

1070

dbus.String(value, variant_level=1))

1310

self.host = unicode(value)

1071

1311

1072

1312

# Created - property

1073

1313

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

1074

1314

def Created_dbus_property(self):

1075

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

1315

return datetime_to_dbus(self.created)

1076

1316

1077

1317

# LastEnabled - property

1078

1318

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

1079

1319

def LastEnabled_dbus_property(self):

1080

return self._datetime_to_dbus(self.last_enabled)

1320

return datetime_to_dbus(self.last_enabled)

1081

1321

1082

1322

# Enabled - property

1083

1323

@dbus_service_property(_interface, signature="b",

1097

1337

if value is not None:

1098

1338

self.checked_ok()

1099

1339

return

1100

return self._datetime_to_dbus(self.last_checked_ok)

1340

return datetime_to_dbus(self.last_checked_ok)

1101

1341

1102

1342

# Expires - property

1103

1343

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

1104

1344

def Expires_dbus_property(self):

1105

return self._datetime_to_dbus(self.expires)

1345

return datetime_to_dbus(self.expires)

1106

1346

1107

1347

# LastApprovalRequest - property

1108

1348

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

1109

1349

def LastApprovalRequest_dbus_property(self):

1110

return self._datetime_to_dbus(self.last_approval_request)

1350

return datetime_to_dbus(self.last_approval_request)

1111

1351

1112

1352

# Timeout - property

1113

1353

@dbus_service_property(_interface, signature="t",

1115

1355

def Timeout_dbus_property(self, value=None):

1116

1356

if value is None: # get

1117

1357

return dbus.UInt64(self.timeout_milliseconds())

1118

old_value = self.timeout

1119

1358

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

1120

# Emit D-Bus signal

1121

if old_value != self.timeout:

1122

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

1123

dbus.UInt64(value, variant_level=1))

1124

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

1125

return

1126

1359

# Reschedule timeout

1127

gobject.source_remove(self.disable_initiator_tag)

1128

self.disable_initiator_tag = None

1129

self.expires = None

1130

time_to_die = (self.

1131

_timedelta_to_milliseconds((self

1132

.last_checked_ok

1133

+ self.timeout)

1134

- datetime.datetime

1135

.utcnow()))

1136

if time_to_die <= 0:

1137

# The timeout has passed

1138

self.disable()

1139

else:

1140

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

1141

+ datetime.timedelta(milliseconds = time_to_die))

1142

self.disable_initiator_tag = (gobject.timeout_add

1143

(time_to_die, self.disable))

1144

1360

if self.enabled:

1361

now = datetime.datetime.utcnow()

1362

time_to_die = timedelta_to_milliseconds(

1363

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

1364

if time_to_die <= 0:

1365

# The timeout has passed

1366

self.disable()

1367

else:

1368

self.expires = (now +

1369

datetime.timedelta(milliseconds =

1370

time_to_die))

1371

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

1372

is None):

1373

return

1374

gobject.source_remove(self.disable_initiator_tag)

1375

self.disable_initiator_tag = (gobject.timeout_add

1376

(time_to_die,

1377

self.disable))

1378

1145

1379

# ExtendedTimeout - property

1146

1380

@dbus_service_property(_interface, signature="t",

1147

1381

access="readwrite")

1148

1382

def ExtendedTimeout_dbus_property(self, value=None):

1149

1383

if value is None: # get

1150

1384

return dbus.UInt64(self.extended_timeout_milliseconds())

1151

old_value = self.extended_timeout

1152

1385

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

1153

# Emit D-Bus signal

1154

if old_value != self.extended_timeout:

1155

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

1156

dbus.UInt64(value, variant_level=1))

1157

1386

1158

1387

# Interval - property

1159

1388

@dbus_service_property(_interface, signature="t",

1160

1389

access="readwrite")

1161

1390

def Interval_dbus_property(self, value=None):

1162

1391

if value is None: # get

1163

1392

return dbus.UInt64(self.interval_milliseconds())

1164

old_value = self.interval

1165

1393

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

1166

# Emit D-Bus signal

1167

if old_value != self.interval:

1168

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

1169

dbus.UInt64(value, variant_level=1))

1170

1394

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

1171

1395

return

1172

# Reschedule checker run

1173

gobject.source_remove(self.checker_initiator_tag)

1174

self.checker_initiator_tag = (gobject.timeout_add

1175

(value, self.start_checker))

1176

self.start_checker() # Start one now, too

1177

1396

if self.enabled:

1397

# Reschedule checker run

1398

gobject.source_remove(self.checker_initiator_tag)

1399

self.checker_initiator_tag = (gobject.timeout_add

1400

(value, self.start_checker))

1401

self.start_checker() # Start one now, too

1402

1178

1403

# Checker - property

1179

1404

@dbus_service_property(_interface, signature="s",

1180

1405

access="readwrite")

1181

1406

def Checker_dbus_property(self, value=None):

1182

1407

if value is None: # get

1183

1408

return dbus.String(self.checker_command)

1184

old_value = self.checker_command

1185

self.checker_command = value

1186

# Emit D-Bus signal

1187

if old_value != self.checker_command:

1188

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

1189

dbus.String(self.checker_command,

1190

variant_level=1))

1409

self.checker_command = unicode(value)

1191

1410

1192

1411

# CheckerRunning - property

1193

1412

@dbus_service_property(_interface, signature="b",

1220

1439

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

1221

1440

if not self._pipe.recv():

1222

1441

raise KeyError()

1223

1442

1224

1443

def __getattribute__(self, name):

1225

if(name == '_pipe'):

1444

if name == '_pipe':

1226

1445

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

1227

1446

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

1228

1447

data = self._pipe.recv()

1233

1452

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

1234

1453

return self._pipe.recv()[1]

1235

1454

return func

1236

1455

1237

1456

def __setattr__(self, name, value):

1238

if(name == '_pipe'):

1457

if name == '_pipe':

1239

1458

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

1240

1459

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

1241

1460

1242

1461

1462

class ClientDBusTransitional(ClientDBus):

1463

__metaclass__ = AlternateDBusNamesMetaclass

1464

1465

1243

1466

class ClientHandler(socketserver.BaseRequestHandler, object):

1244

1467

"""A class to handle client connections.

1245

1468

1252

1475

unicode(self.client_address))

1253

1476

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

1254

1477

self.server.child_pipe.fileno())

1255

1478

1256

1479

session = (gnutls.connection

1257

1480

.ClientSession(self.request,

1258

1481

gnutls.connection

1259

1482

.X509Credentials()))

1260

1483

1261

1484

# Note: gnutls.connection.X509Credentials is really a

1262

1485

# generic GnuTLS certificate credentials object so long as

1263

1486

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

1264

1487

# here despite using OpenPGP certificates.

1265

1488

1266

1489

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

1267

1490

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

1268

1491

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

1274

1497

(gnutls.library.functions

1275

1498

.gnutls_priority_set_direct(session._c_object,

1276

1499

priority, None))

1277

1500

1278

1501

# Start communication using the Mandos protocol

1279

1502

# Get protocol number

1280

1503

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

1285

1508

except (ValueError, IndexError, RuntimeError) as error:

1286

1509

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

1287

1510

return

1288

1511

1289

1512

# Start GnuTLS connection

1290

1513

try:

1291

1514

session.handshake()

1295

1518

# established. Just abandon the request.

1296

1519

return

1297

1520

logger.debug("Handshake succeeded")

1298

1521

1299

1522

approval_required = False

1300

1523

try:

1301

1524

try:

1306

1529

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

1307

1530

return

1308

1531

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

1309

1532

1310

1533

try:

1311

1534

client = ProxyClient(child_pipe, fpr,

1312

1535

self.client_address)

1324

1547

client.name)

1325

1548

if self.server.use_dbus:

1326

1549

# Emit D-Bus signal

1327

client.Rejected("Disabled")

1550

client.Rejected("Disabled")

1328

1551

return

1329

1552

1330

if client._approved or not client.approval_delay:

1553

if client.approved or not client.approval_delay:

1331

1554

#We are approved or approval is disabled

1332

1555

break

1333

elif client._approved is None:

1556

elif client.approved is None:

1334

1557

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

1335

1558

client.name)

1336

1559

if self.server.use_dbus:

1347

1570

return

1348

1571

1349

1572

#wait until timeout or approved

1350

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

1351

1573

time = datetime.datetime.now()

1352

1574

client.changedstate.acquire()

1353

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

1575

(client.changedstate.wait

1576

(float(client.timedelta_to_milliseconds(delay)

1577

/ 1000)))

1354

1578

client.changedstate.release()

1355

1579

time2 = datetime.datetime.now()

1356

1580

if (time2 - time) >= delay:

1378

1602

sent, len(client.secret)

1379

1603

- (sent_size + sent))

1380

1604

sent_size += sent

1381

1605

1382

1606

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

1383

# bump the timeout as if seen

1607

# bump the timeout using extended_timeout

1384

1608

client.checked_ok(client.extended_timeout)

1385

1609

if self.server.use_dbus:

1386

1610

# Emit D-Bus signal

1454

1678

# Convert the buffer to a Python bytestring

1455

1679

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

1456

1680

# Convert the bytestring to hexadecimal notation

1457

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

1681

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

1458

1682

return hex_fpr

1459

1683

1460

1684

1463

1687

def sub_process_main(self, request, address):

1464

1688

try:

1465

1689

self.finish_request(request, address)

1466

except:

1690

except Exception:

1467

1691

self.handle_error(request, address)

1468

1692

self.close_request(request)

1469

1693

1470

1694

def process_request(self, request, address):

1471

1695

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

1472

multiprocessing.Process(target = self.sub_process_main,

1473

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

1696

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

1697

args = (request,

1698

address))

1699

proc.start()

1700

return proc

1701

1474

1702

1475

1703

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1476

1704

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

1480

1708

This function creates a new pipe in self.pipe

1481

1709

"""

1482

1710

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1483

1484

super(MultiprocessingMixInWithPipe,

1485

self).process_request(request, client_address)

1711

1712

proc = MultiprocessingMixIn.process_request(self, request,

1713

client_address)

1486

1714

self.child_pipe.close()

1487

self.add_pipe(parent_pipe)

1488

1489

def add_pipe(self, parent_pipe):

1715

self.add_pipe(parent_pipe, proc)

1716

1717

def add_pipe(self, parent_pipe, proc):

1490

1718

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

1491

1719

raise NotImplementedError

1492

1720

1721

1493

1722

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1494

1723

socketserver.TCPServer, object):

1495

1724

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

1569

1798

self.enabled = False

1570

1799

self.clients = clients

1571

1800

if self.clients is None:

1572

self.clients = set()

1801

self.clients = {}

1573

1802

self.use_dbus = use_dbus

1574

1803

self.gnutls_priority = gnutls_priority

1575

1804

IPv6_TCPServer.__init__(self, server_address,

1579

1808

def server_activate(self):

1580

1809

if self.enabled:

1581

1810

return socketserver.TCPServer.server_activate(self)

1811

1582

1812

def enable(self):

1583

1813

self.enabled = True

1584

def add_pipe(self, parent_pipe):

1814

1815

def add_pipe(self, parent_pipe, proc):

1585

1816

# Call "handle_ipc" for both data and EOF events

1586

1817

gobject.io_add_watch(parent_pipe.fileno(),

1587

1818

gobject.IO_IN | gobject.IO_HUP,

1588

1819

functools.partial(self.handle_ipc,

1589

parent_pipe = parent_pipe))

1590

1820

parent_pipe =

1821

parent_pipe,

1822

proc = proc))

1823

1591

1824

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

1592

client_object=None):

1825

proc = None, client_object=None):

1593

1826

condition_names = {

1594

1827

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

1595

1828

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

1604

1837

for cond, name in

1605

1838

condition_names.iteritems()

1606

1839

if cond & condition)

1607

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

1840

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

1608

1841

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

1842

# Wait for other process to exit

1843

proc.join()

1609

1844

return False

1610

1845

1611

1846

# Read a request from the child

1616

1851

fpr = request[1]

1617

1852

address = request[2]

1618

1853

1619

for c in self.clients:

1854

for c in self.clients.itervalues():

1620

1855

if c.fingerprint == fpr:

1621

1856

client = c

1622

1857

break

1625

1860

"dress: %s", fpr, address)

1626

1861

if self.use_dbus:

1627

1862

# Emit D-Bus signal

1628

mandos_dbus_service.ClientNotFound(fpr, address[0])

1863

mandos_dbus_service.ClientNotFound(fpr,

1864

address[0])

1629

1865

parent_pipe.send(False)

1630

1866

return False

1631

1867

1632

1868

gobject.io_add_watch(parent_pipe.fileno(),

1633

1869

gobject.IO_IN | gobject.IO_HUP,

1634

1870

functools.partial(self.handle_ipc,

1635

parent_pipe = parent_pipe,

1636

client_object = client))

1871

parent_pipe =

1872

parent_pipe,

1873

proc = proc,

1874

client_object =

1875

client))

1637

1876

parent_pipe.send(True)

1638

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

1877

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

1878

# same fileno

1639

1879

return False

1640

1880

if command == 'funcall':

1641

1881

funcname = request[1]

1642

1882

args = request[2]

1643

1883

kwargs = request[3]

1644

1884

1645

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

1646

1885

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

1886

funcname)(*args,

1887

**kwargs)))

1888

1647

1889

if command == 'getattr':

1648

1890

attrname = request[1]

1649

1891

if callable(client_object.__getattribute__(attrname)):

1650

1892

parent_pipe.send(('function',))

1651

1893

else:

1652

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

1894

parent_pipe.send(('data', client_object

1895

.__getattribute__(attrname)))

1653

1896

1654

1897

if command == 'setattr':

1655

1898

attrname = request[1]

1656

1899

value = request[2]

1657

1900

setattr(client_object, attrname, value)

1658

1901

1659

1902

return True

1660

1903

1661

1904

1698

1941

return timevalue

1699

1942

1700

1943

1701

def if_nametoindex(interface):

1702

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

1703

1704

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

1705

global if_nametoindex

1706

try:

1707

if_nametoindex = (ctypes.cdll.LoadLibrary

1708

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

1709

.if_nametoindex)

1710

except (OSError, AttributeError):

1711

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

1712

def if_nametoindex(interface):

1713

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

1714

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

1715

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

1716

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1717

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

1718

interface))

1719

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

1720

ifreq[16:20])[0]

1721

return interface_index

1722

return if_nametoindex(interface)

1723

1724

1725

1944

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

1726

1945

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

1727

1946

1782

2001

" system bus interface")

1783

2002

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

1784

2003

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

2004

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

2005

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

2006

" state")

2007

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

2008

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

2009

1785

2010

options = parser.parse_args()

1786

2011

1787

2012

if options.check:

1800

2025

"use_dbus": "True",

1801

2026

"use_ipv6": "True",

1802

2027

"debuglevel": "",

2028

"restore": "True",

2029

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

1803

2030

}

1804

2031

1805

2032

# Parse config file for server-global settings

1822

2049

# options, if set.

1823

2050

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

1824

2051

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

1825

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

2052

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

2053

"statedir"):

1826

2054

value = getattr(options, option)

1827

2055

if value is not None:

1828

2056

server_settings[option] = value

1840

2068

debuglevel = server_settings["debuglevel"]

1841

2069

use_dbus = server_settings["use_dbus"]

1842

2070

use_ipv6 = server_settings["use_ipv6"]

1843

2071

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

2072

stored_state_file)

2073

2074

if debug:

2075

initlogger(debug, logging.DEBUG)

2076

else:

2077

if not debuglevel:

2078

initlogger(debug)

2079

else:

2080

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

2081

initlogger(debug, level)

2082

1844

2083

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

1845

2084

syslogger.setFormatter(logging.Formatter

1846

2085

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

1848

2087

% server_settings["servicename"]))

1849

2088

1850

2089

# Parse config file with clients

1851

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

1852

"extended_timeout": "15m",

1853

"interval": "2m",

1854

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

1855

"host": "",

1856

"approval_delay": "0s",

1857

"approval_duration": "1s",

1858

}

1859

client_config = configparser.SafeConfigParser(client_defaults)

2090

client_config = configparser.SafeConfigParser(Client

2091

.client_defaults)

1860

2092

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

1861

2093

"clients.conf"))

1862

2094

1900

2132

if error[0] != errno.EPERM:

1901

2133

raise error

1902

2134

1903

if not debug and not debuglevel:

1904

syslogger.setLevel(logging.WARNING)

1905

console.setLevel(logging.WARNING)

1906

if debuglevel:

1907

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

1908

syslogger.setLevel(level)

1909

console.setLevel(level)

1910

1911

2135

if debug:

1912

2136

# Enable all possible GnuTLS debugging

1913

2137

1927

2151

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

1928

2152

if null > 2:

1929

2153

os.close(null)

1930

else:

1931

# No console logging

1932

logger.removeHandler(console)

1933

2154

1934

2155

# Need to fork before connecting to D-Bus

1935

2156

if not debug:

1936

2157

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

1937

2158

daemon()

1938

2159

2160

gobject.threads_init()

2161

1939

2162

global main_loop

1940

2163

# From the Avahi example code

1941

2164

DBusGMainLoop(set_as_default=True )

1944

2167

# End of Avahi example code

1945

2168

if use_dbus:

1946

2169

try:

1947

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

2170

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

1948

2171

bus, do_not_queue=True)

2172

old_bus_name = (dbus.service.BusName

2173

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

2174

do_not_queue=True))

1949

2175

except dbus.exceptions.NameExistsException as e:

1950

2176

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

1951

2177

use_dbus = False

1952

2178

server_settings["use_dbus"] = False

1953

2179

tcp_server.use_dbus = False

1954

2180

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1955

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

1956

servicetype = "_mandos._tcp",

1957

protocol = protocol, bus = bus)

2181

service = AvahiServiceToSyslog(name =

2182

server_settings["servicename"],

2183

servicetype = "_mandos._tcp",

2184

protocol = protocol, bus = bus)

1958

2185

if server_settings["interface"]:

1959

2186

service.interface = (if_nametoindex

1960

2187

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

1964

2191

1965

2192

client_class = Client

1966

2193

if use_dbus:

1967

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

1968

def client_config_items(config, section):

1969

special_settings = {

1970

"approved_by_default":

1971

lambda: config.getboolean(section,

1972

"approved_by_default"),

1973

}

1974

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

2194

client_class = functools.partial(ClientDBusTransitional,

2195

bus = bus)

2196

2197

client_settings = Client.config_parser(client_config)

2198

old_client_settings = {}

2199

clients_data = {}

2200

2201

# Get client data and settings from last running state.

2202

if server_settings["restore"]:

2203

try:

2204

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

2205

clients_data, old_client_settings = (pickle.load

2206

(stored_state))

2207

os.remove(stored_state_path)

2208

except IOError as e:

2209

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

2210

.format(e))

2211

if e.errno != errno.ENOENT:

2212

raise

2213

except EOFError as e:

2214

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

2215

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

2216

2217

with PGPEngine() as pgp:

2218

for client_name, client in clients_data.iteritems():

2219

# Decide which value to use after restoring saved state.

2220

# We have three different values: Old config file,

2221

# new config file, and saved state.

2222

# New config value takes precedence if it differs from old

2223

# config value, otherwise use saved state.

2224

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

2225

try:

2226

# For each value in new config, check if it

2227

# differs from the old config value (Except for

2228

# the "secret" attribute)

2229

if (name != "secret" and

2230

value != old_client_settings[client_name]

2231

[name]):

2232

client[name] = value

2233

except KeyError:

2234

pass

2235

2236

# Clients who has passed its expire date can still be

2237

# enabled if its last checker was successful. Clients

2238

# whose checker succeeded before we stored its state is

2239

# assumed to have successfully run all checkers during

2240

# downtime.

2241

if client["enabled"]:

2242

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

2243

if not client["last_checked_ok"]:

2244

logger.warning(

2245

"disabling client {0} - Client never "

2246

"performed a successful checker"

2247

.format(client_name))

2248

client["enabled"] = False

2249

elif client["last_checker_status"] != 0:

2250

logger.warning(

2251

"disabling client {0} - Client "

2252

"last checker failed with error code {1}"

2253

.format(client_name,

2254

client["last_checker_status"]))

2255

client["enabled"] = False

2256

else:

2257

client["expires"] = (datetime.datetime

2258

.utcnow()

2259

+ client["timeout"])

2260

logger.debug("Last checker succeeded,"

2261

" keeping {0} enabled"

2262

.format(client_name))

1975

2263

try:

1976

yield (name, special_settings[name]())

1977

except KeyError:

1978

yield (name, value)

1979

1980

tcp_server.clients.update(set(

1981

client_class(name = section,

1982

config= dict(client_config_items(

1983

client_config, section)))

1984

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)

2278

- set(client_settings)):

2279

del clients_data[client_name]

2280

for client_name in (set(client_settings)

2281

- set(old_client_settings)):

2282

clients_data[client_name] = client_settings[client_name]

2283

2284

# Create all client objects

2285

for client_name, client in clients_data.iteritems():

2286

tcp_server.clients[client_name] = client_class(

2287

name = client_name, settings = client)

2288

1985

2289

if not tcp_server.clients:

1986

2290

logger.warning("No clients defined")

1987

2291

1998

2302

# "pidfile" was never created

1999

2303

pass

2000

2304

del pidfilename

2001

2002

2305

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

2003

2306

2004

2307

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

2005

2308

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

2006

2309

2009

2312

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

2010

2313

def __init__(self):

2011

2314

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

2012

_interface = "se.bsnet.fukt.Mandos"

2315

_interface = "se.recompile.Mandos"

2013

2316

2014

2317

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

2015

2318

def ClientAdded(self, objpath):

2030

2333

def GetAllClients(self):

2031

2334

"D-Bus method"

2032

2335

return dbus.Array(c.dbus_object_path

2033

for c in tcp_server.clients)

2336

for c in

2337

tcp_server.clients.itervalues())

2034

2338

2035

2339

@dbus.service.method(_interface,

2036

2340

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

2038

2342

"D-Bus method"

2039

2343

return dbus.Dictionary(

2040

2344

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

2041

for c in tcp_server.clients),

2345

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

2042

2346

signature="oa{sv}")

2043

2347

2044

2348

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

2045

2349

def RemoveClient(self, object_path):

2046

2350

"D-Bus method"

2047

for c in tcp_server.clients:

2351

for c in tcp_server.clients.itervalues():

2048

2352

if c.dbus_object_path == object_path:

2049

tcp_server.clients.remove(c)

2353

del tcp_server.clients[c.name]

2050

2354

c.remove_from_connection()

2051

2355

# Don't signal anything except ClientRemoved

2052

2356

c.disable(quiet=True)

2057

2361

2058

2362

del _interface

2059

2363

2060

mandos_dbus_service = MandosDBusService()

2364

class MandosDBusServiceTransitional(MandosDBusService):

2365

__metaclass__ = AlternateDBusNamesMetaclass

2366

mandos_dbus_service = MandosDBusServiceTransitional()

2061

2367

2062

2368

def cleanup():

2063

2369

"Cleanup function; run on exit"

2064

2370

service.cleanup()

2065

2371

2372

multiprocessing.active_children()

2373

if not (tcp_server.clients or client_settings):

2374

return

2375

2376

# Store client before exiting. Secrets are encrypted with key

2377

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

2378

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

2379

clients = {}

2380

with PGPEngine() as pgp:

2381

for client in tcp_server.clients.itervalues():

2382

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

2383

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

2384

key)

2385

client_dict = {}

2386

2387

# A list of attributes that can not be pickled

2388

# + secret.

2389

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

2390

"checker"))

2391

for name, typ in (inspect.getmembers

2392

(dbus.service.Object)):

2393

exclude.add(name)

2394

2395

client_dict["encrypted_secret"] = (client

2396

.encrypted_secret)

2397

for attr in client.client_structure:

2398

if attr not in exclude:

2399

client_dict[attr] = getattr(client, attr)

2400

2401

clients[client.name] = client_dict

2402

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

2403

2404

try:

2405

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

2406

prefix="clients-",

2407

dir=os.path.dirname

2408

(stored_state_path))

2409

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

2410

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

2411

os.rename(tempname, stored_state_path)

2412

except (IOError, OSError) as e:

2413

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

2414

.format(e))

2415

if not debug:

2416

try:

2417

os.remove(tempname)

2418

except NameError:

2419

pass

2420

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

2421

errno.EEXIST)):

2422

raise e

2423

2424

# Delete all clients, and settings from config

2066

2425

while tcp_server.clients:

2067

client = tcp_server.clients.pop()

2426

name, client = tcp_server.clients.popitem()

2068

2427

if use_dbus:

2069

2428

client.remove_from_connection()

2070

client.disable_hook = None

2071

2429

# Don't signal anything except ClientRemoved

2072

2430

client.disable(quiet=True)

2073

2431

if use_dbus:

2074

2432

# Emit D-Bus signal

2075

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2433

mandos_dbus_service.ClientRemoved(client

2434

.dbus_object_path,

2076

2435

client.name)

2436

client_settings.clear()

2077

2437

2078

2438

atexit.register(cleanup)

2079

2439

2080

for client in tcp_server.clients:

2440

for client in tcp_server.clients.itervalues():

2081

2441

if use_dbus:

2082

2442

# Emit D-Bus signal

2083

2443

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2084

client.enable()

2444

# Need to initiate checking of clients

2445

if client.enabled:

2446

client.init_checker()

2085

2447

2086

2448

tcp_server.enable()

2087

2449

tcp_server.server_activate()