/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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def timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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

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Attributes:

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

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

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

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

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

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

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checker_initiator_tag: a gobject event source tag, or None

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

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client_structure: Object describing what attributes a client has

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and is used for storing the client at exit

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current_checker_command: string; current running checker_command

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

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disable_initiator_tag: a gobject event source tag, or None

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enabled: bool()

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

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

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

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

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last_enabled: datetime.datetime(); (UTC)

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last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, or None.

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

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

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D-Bus identifiers

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

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

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"extended_timeout": "15m",

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"interval": "2m",

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

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"host": "",

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"approval_delay": "0s",

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"approval_duration": "1s",

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"approved_by_default": "True",

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"enabled": "True",

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}

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def timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

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return _timedelta_to_milliseconds(self.timeout)

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return timedelta_to_milliseconds(self.timeout)

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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return _timedelta_to_milliseconds(self.extended_timeout)

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return timedelta_to_milliseconds(self.extended_timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return _timedelta_to_milliseconds(self.interval)

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return timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

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return _timedelta_to_milliseconds(self.approval_delay)

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

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return timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

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def config_parser(config):

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

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

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with exceptions for any special settings as defined above.

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

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value given the same arguments.

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"""

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settings = {}

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for client_name in config.sections():

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section = dict(config.items(client_name))

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client = settings[client_name] = {}

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

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# Reformat values from string types to Python types

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client["approved_by_default"] = config.getboolean(

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client_name, "approved_by_default")

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

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"enabled")

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

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.replace(" ", ""))

483

if "secret" in section:

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

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elif "secfile" in section:

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

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(section["secfile"])),

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"rb") as secfile:

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

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else:

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

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% section)

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

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client["extended_timeout"] = string_to_delta(

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section["extended_timeout"])

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

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client["approval_delay"] = string_to_delta(

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section["approval_delay"])

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client["approval_duration"] = string_to_delta(

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section["approval_duration"])

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

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client["last_approval_request"] = None

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client["last_checked_ok"] = None

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client["last_checker_status"] = None

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return settings

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

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510

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

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

335

512

attribute."""

336

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self.name = name

337

if config is None:

338

config = {}

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# adding all client settings

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for setting, value in settings.iteritems():

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setattr(self, setting, value)

517

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if self.enabled:

519

if not hasattr(self, "last_enabled"):

520

self.last_enabled = datetime.datetime.utcnow()

521

if not hasattr(self, "expires"):

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

523

+ self.timeout)

524

else:

525

self.last_enabled = None

526

self.expires = None

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

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529

# Uppercase and remove spaces from fingerprint for later

341

530

# comparison purposes with return value from the fingerprint()

342

531

# function

343

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

344

.replace(" ", ""))

345

532

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

346

if "secret" in config:

347

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

348

elif "secfile" in config:

349

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

350

(config["secfile"])),

351

"rb") as secfile:

352

self.secret = secfile.read()

353

else:

354

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

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% self.name)

356

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

357

self.created = datetime.datetime.utcnow()

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self.enabled = False

359

self.last_approval_request = None

360

self.last_enabled = None

361

self.last_checked_ok = None

362

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

363

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

364

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

365

self.disable_hook = disable_hook

533

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

534

datetime.datetime.utcnow())

535

536

# attributes specific for this server instance

366

537

self.checker = None

367

538

self.checker_initiator_tag = None

368

539

self.disable_initiator_tag = None

369

self.expires = None

370

540

self.checker_callback_tag = None

371

self.checker_command = config["checker"]

372

541

self.current_checker_command = None

373

self.last_connect = None

374

self._approved = None

375

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

376

True)

542

self.approved = None

377

543

self.approvals_pending = 0

378

self.approval_delay = string_to_delta(

379

config["approval_delay"])

380

self.approval_duration = string_to_delta(

381

config["approval_duration"])

382

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

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)

383

558

559

# Send notice to process children that client state has changed

384

560

def send_changedstate(self):

385

self.changedstate.acquire()

386

self.changedstate.notify_all()

387

self.changedstate.release()

388

561

with self.changedstate:

562

self.changedstate.notify_all()

563

389

564

def enable(self):

390

565

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

391

566

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

392

567

# Already enabled

393

568

return

394

569

self.send_changedstate()

395

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

396

# and every interval from then on.

397

self.checker_initiator_tag = (gobject.timeout_add

398

(self.interval_milliseconds(),

399

self.start_checker))

400

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

401

570

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

402

self.disable_initiator_tag = (gobject.timeout_add

403

(self.timeout_milliseconds(),

404

self.disable))

405

571

self.enabled = True

406

572

self.last_enabled = datetime.datetime.utcnow()

407

# Also start a new checker *right now*.

408

self.start_checker()

573

self.init_checker()

409

574

410

575

def disable(self, quiet=True):

411

576

"""Disable this client."""

423

588

gobject.source_remove(self.checker_initiator_tag)

424

589

self.checker_initiator_tag = None

425

590

self.stop_checker()

426

if self.disable_hook:

427

self.disable_hook(self)

428

591

self.enabled = False

429

592

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

430

593

return False

431

594

432

595

def __del__(self):

433

self.disable_hook = None

434

596

self.disable()

435

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

436

611

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

437

612

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

438

613

self.checker_callback_tag = None

439

614

self.checker = None

440

615

if os.WIFEXITED(condition):

441

exitstatus = os.WEXITSTATUS(condition)

442

if exitstatus == 0:

616

self.last_checker_status = os.WEXITSTATUS(condition)

617

if self.last_checker_status == 0:

443

618

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

444

619

vars(self))

445

620

self.checked_ok()

447

622

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

448

623

vars(self))

449

624

else:

625

self.last_checker_status = -1

450

626

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

451

627

vars(self))

452

628

459

635

if timeout is None:

460

636

timeout = self.timeout

461

637

self.last_checked_ok = datetime.datetime.utcnow()

462

gobject.source_remove(self.disable_initiator_tag)

463

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

464

self.disable_initiator_tag = (gobject.timeout_add

465

(_timedelta_to_milliseconds(timeout),

466

self.disable))

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

467

645

468

646

def need_approval(self):

469

647

self.last_approval_request = datetime.datetime.utcnow()

509

687

'replace')))

510

688

for attr in

511

689

self.runtime_expansions)

512

690

513

691

try:

514

692

command = self.checker_command % escaped_attrs

515

693

except TypeError as error:

561

739

raise

562

740

self.checker = None

563

741

742

564

743

def dbus_service_property(dbus_interface, signature="v",

565

744

access="readwrite", byte_arrays=False):

566

745

"""Decorators for marking methods of a DBusObjectWithProperties to

612

791

613

792

class DBusObjectWithProperties(dbus.service.Object):

614

793

"""A D-Bus object with properties.

615

794

616

795

Classes inheriting from this can use the dbus_service_property

617

796

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

618

797

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

625

804

def _get_all_dbus_properties(self):

626

805

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

627

806

"""

628

return ((prop._dbus_name, prop)

807

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

808

for cls in self.__class__.__mro__

629

809

for name, prop in

630

inspect.getmembers(self, self._is_dbus_property))

810

inspect.getmembers(cls, self._is_dbus_property))

631

811

632

812

def _get_dbus_property(self, interface_name, property_name):

633

813

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

634

814

property with the specified name and interface.

635

815

"""

636

for name in (property_name,

637

property_name + "_dbus_property"):

638

prop = getattr(self, name, None)

639

if (prop is None

640

or not self._is_dbus_property(prop)

641

or prop._dbus_name != property_name

642

or (interface_name and prop._dbus_interface

643

and interface_name != prop._dbus_interface)):

644

continue

645

return prop

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

646

823

# No such property

647

824

raise DBusPropertyNotFound(self.dbus_object_path + ":"

648

825

+ interface_name + "."

673

850

# signatures other than "ay".

674

851

if prop._dbus_signature != "ay":

675

852

raise ValueError

676

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

677

for byte in value))

853

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

854

for byte in value))

678

855

prop(value)

679

856

680

857

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

682

859

def GetAll(self, interface_name):

683

860

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

684

861

standard.

685

862

686

863

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

687

864

"""

688

all = {}

865

properties = {}

689

866

for name, prop in self._get_all_dbus_properties():

690

867

if (interface_name

691

868

and interface_name != prop._dbus_interface):

696

873

continue

697

874

value = prop()

698

875

if not hasattr(value, "variant_level"):

699

all[name] = value

876

properties[name] = value

700

877

continue

701

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

702

value.variant_level+1)

703

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")

704

881

705

882

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

706

883

out_signature="s",

757

934

return dbus.String(dt.isoformat(),

758

935

variant_level=variant_level)

759

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

760

1036

class ClientDBus(Client, DBusObjectWithProperties):

761

1037

"""A Client class using D-Bus

762

1038

771

1047

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

772

1048

773

1049

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

774

self._approvals_pending = 0

775

1050

self.bus = bus

776

1051

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

777

1052

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

787

1062

def notifychangeproperty(transform_func,

788

1063

dbus_name, type_func=lambda x: x,

789

1064

variant_level=1):

790

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

791

changes to DBus.

792

transform_fun: Function that takes a value and transform it to

793

DBus type.

794

dbus_name: DBus name of the variable

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

795

1071

type_func: Function that transform the value before sending it

796

to DBus

797

variant_level: DBus variant level. default: 1

1072

to the D-Bus. Default: no transform

1073

variant_level: D-Bus variant level. Default: 1

798

1074

"""

799

real_value = [None,]

1075

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

800

1076

def setter(self, value):

801

old_value = real_value[0]

802

real_value[0] = value

803

1077

if hasattr(self, "dbus_object_path"):

804

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

805

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

806

variant_level)

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)

807

1084

self.PropertyChanged(dbus.String(dbus_name),

808

1085

dbus_value)

809

810

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

811

812

1086

setattr(self, attrname, value)

1087

1088

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

1089

1090

813

1091

expires = notifychangeproperty(datetime_to_dbus, "Expires")

814

1092

approvals_pending = notifychangeproperty(dbus.Boolean,

815

1093

"ApprovalPending",

818

1096

last_enabled = notifychangeproperty(datetime_to_dbus,

819

1097

"LastEnabled")

820

1098

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

821

type_func = lambda checker: checker is not None)

1099

type_func = lambda checker:

1100

checker is not None)

822

1101

last_checked_ok = notifychangeproperty(datetime_to_dbus,

823

1102

"LastCheckedOK")

824

last_approval_request = notifychangeproperty(datetime_to_dbus,

825

"LastApprovalRequest")

1103

last_approval_request = notifychangeproperty(

1104

datetime_to_dbus, "LastApprovalRequest")

826

1105

approved_by_default = notifychangeproperty(dbus.Boolean,

827

1106

"ApprovedByDefault")

828

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

829

type_func = _timedelta_to_milliseconds)

830

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

831

type_func = _timedelta_to_milliseconds)

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)

832

1114

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

833

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

834

type_func = _timedelta_to_milliseconds)

835

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

836

type_func = _timedelta_to_milliseconds)

837

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

838

type_func = _timedelta_to_milliseconds)

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)

839

1125

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

840

1126

841

1127

del notifychangeproperty

867

1153

868

1154

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

869

1155

*args, **kwargs)

870

1156

871

1157

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

872

1158

old_checker = self.checker

873

1159

if self.checker is not None:

883

1169

return r

884

1170

885

1171

def _reset_approved(self):

886

self._approved = None

1172

self.approved = None

887

1173

return False

888

1174

889

1175

def approve(self, value=True):

890

1176

self.send_changedstate()

891

self._approved = value

892

gobject.timeout_add(_timedelta_to_milliseconds

1177

self.approved = value

1178

gobject.timeout_add(timedelta_to_milliseconds

893

1179

(self.approval_duration),

894

1180

self._reset_approved)

895

1181

896

1182

897

1183

## D-Bus methods, signals & properties

898

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

1184

_interface = "se.recompile.Mandos.Client"

899

1185

900

1186

## Signals

901

1187

1001

1287

access="readwrite")

1002

1288

def ApprovalDuration_dbus_property(self, value=None):

1003

1289

if value is None: # get

1004

return dbus.UInt64(_timedelta_to_milliseconds(

1290

return dbus.UInt64(timedelta_to_milliseconds(

1005

1291

self.approval_duration))

1006

1292

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

1007

1293

1021

1307

def Host_dbus_property(self, value=None):

1022

1308

if value is None: # get

1023

1309

return dbus.String(self.host)

1024

self.host = value

1310

self.host = unicode(value)

1025

1311

1026

1312

# Created - property

1027

1313

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

1028

1314

def Created_dbus_property(self):

1029

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

1315

return datetime_to_dbus(self.created)

1030

1316

1031

1317

# LastEnabled - property

1032

1318

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

1070

1356

if value is None: # get

1071

1357

return dbus.UInt64(self.timeout_milliseconds())

1072

1358

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

1073

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

1074

return

1075

1359

# Reschedule timeout

1076

gobject.source_remove(self.disable_initiator_tag)

1077

self.disable_initiator_tag = None

1078

self.expires = None

1079

time_to_die = (self.

1080

_timedelta_to_milliseconds((self

1081

.last_checked_ok

1082

+ self.timeout)

1083

- datetime.datetime

1084

.utcnow()))

1085

if time_to_die <= 0:

1086

# The timeout has passed

1087

self.disable()

1088

else:

1089

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

1090

+ datetime.timedelta(milliseconds = time_to_die))

1091

self.disable_initiator_tag = (gobject.timeout_add

1092

(time_to_die, self.disable))

1093

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

1094

1379

# ExtendedTimeout - property

1095

1380

@dbus_service_property(_interface, signature="t",

1096

1381

access="readwrite")

1098

1383

if value is None: # get

1099

1384

return dbus.UInt64(self.extended_timeout_milliseconds())

1100

1385

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

1101

1386

1102

1387

# Interval - property

1103

1388

@dbus_service_property(_interface, signature="t",

1104

1389

access="readwrite")

1108

1393

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

1109

1394

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

1110

1395

return

1111

# Reschedule checker run

1112

gobject.source_remove(self.checker_initiator_tag)

1113

self.checker_initiator_tag = (gobject.timeout_add

1114

(value, self.start_checker))

1115

self.start_checker() # Start one now, too

1116

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

1117

1403

# Checker - property

1118

1404

@dbus_service_property(_interface, signature="s",

1119

1405

access="readwrite")

1120

1406

def Checker_dbus_property(self, value=None):

1121

1407

if value is None: # get

1122

1408

return dbus.String(self.checker_command)

1123

self.checker_command = value

1409

self.checker_command = unicode(value)

1124

1410

1125

1411

# CheckerRunning - property

1126

1412

@dbus_service_property(_interface, signature="b",

1153

1439

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

1154

1440

if not self._pipe.recv():

1155

1441

raise KeyError()

1156

1442

1157

1443

def __getattribute__(self, name):

1158

if(name == '_pipe'):

1444

if name == '_pipe':

1159

1445

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

1160

1446

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

1161

1447

data = self._pipe.recv()

1166

1452

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

1167

1453

return self._pipe.recv()[1]

1168

1454

return func

1169

1455

1170

1456

def __setattr__(self, name, value):

1171

if(name == '_pipe'):

1457

if name == '_pipe':

1172

1458

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

1173

1459

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

1174

1460

1175

1461

1462

class ClientDBusTransitional(ClientDBus):

1463

__metaclass__ = AlternateDBusNamesMetaclass

1464

1465

1176

1466

class ClientHandler(socketserver.BaseRequestHandler, object):

1177

1467

"""A class to handle client connections.

1178

1468

1185

1475

unicode(self.client_address))

1186

1476

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

1187

1477

self.server.child_pipe.fileno())

1188

1478

1189

1479

session = (gnutls.connection

1190

1480

.ClientSession(self.request,

1191

1481

gnutls.connection

1192

1482

.X509Credentials()))

1193

1483

1194

1484

# Note: gnutls.connection.X509Credentials is really a

1195

1485

# generic GnuTLS certificate credentials object so long as

1196

1486

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

1197

1487

# here despite using OpenPGP certificates.

1198

1488

1199

1489

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

1200

1490

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

1201

1491

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

1207

1497

(gnutls.library.functions

1208

1498

.gnutls_priority_set_direct(session._c_object,

1209

1499

priority, None))

1210

1500

1211

1501

# Start communication using the Mandos protocol

1212

1502

# Get protocol number

1213

1503

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

1218

1508

except (ValueError, IndexError, RuntimeError) as error:

1219

1509

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

1220

1510

return

1221

1511

1222

1512

# Start GnuTLS connection

1223

1513

try:

1224

1514

session.handshake()

1228

1518

# established. Just abandon the request.

1229

1519

return

1230

1520

logger.debug("Handshake succeeded")

1231

1521

1232

1522

approval_required = False

1233

1523

try:

1234

1524

try:

1239

1529

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

1240

1530

return

1241

1531

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

1242

1532

1243

1533

try:

1244

1534

client = ProxyClient(child_pipe, fpr,

1245

1535

self.client_address)

1257

1547

client.name)

1258

1548

if self.server.use_dbus:

1259

1549

# Emit D-Bus signal

1260

client.Rejected("Disabled")

1550

client.Rejected("Disabled")

1261

1551

return

1262

1552

1263

if client._approved or not client.approval_delay:

1553

if client.approved or not client.approval_delay:

1264

1554

#We are approved or approval is disabled

1265

1555

break

1266

elif client._approved is None:

1556

elif client.approved is None:

1267

1557

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

1268

1558

client.name)

1269

1559

if self.server.use_dbus:

1280

1570

return

1281

1571

1282

1572

#wait until timeout or approved

1283

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

1284

1573

time = datetime.datetime.now()

1285

1574

client.changedstate.acquire()

1286

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

1575

(client.changedstate.wait

1576

(float(client.timedelta_to_milliseconds(delay)

1577

/ 1000)))

1287

1578

client.changedstate.release()

1288

1579

time2 = datetime.datetime.now()

1289

1580

if (time2 - time) >= delay:

1311

1602

sent, len(client.secret)

1312

1603

- (sent_size + sent))

1313

1604

sent_size += sent

1314

1605

1315

1606

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

1316

# bump the timeout as if seen

1607

# bump the timeout using extended_timeout

1317

1608

client.checked_ok(client.extended_timeout)

1318

1609

if self.server.use_dbus:

1319

1610

# Emit D-Bus signal

1387

1678

# Convert the buffer to a Python bytestring

1388

1679

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

1389

1680

# Convert the bytestring to hexadecimal notation

1390

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

1681

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

1391

1682

return hex_fpr

1392

1683

1393

1684

1396

1687

def sub_process_main(self, request, address):

1397

1688

try:

1398

1689

self.finish_request(request, address)

1399

except:

1690

except Exception:

1400

1691

self.handle_error(request, address)

1401

1692

self.close_request(request)

1402

1693

1403

1694

def process_request(self, request, address):

1404

1695

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

1405

multiprocessing.Process(target = self.sub_process_main,

1406

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

1407

1702

1408

1703

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1409

1704

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

1413

1708

This function creates a new pipe in self.pipe

1414

1709

"""

1415

1710

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1416

1417

super(MultiprocessingMixInWithPipe,

1418

self).process_request(request, client_address)

1711

1712

proc = MultiprocessingMixIn.process_request(self, request,

1713

client_address)

1419

1714

self.child_pipe.close()

1420

self.add_pipe(parent_pipe)

1421

1422

def add_pipe(self, parent_pipe):

1715

self.add_pipe(parent_pipe, proc)

1716

1717

def add_pipe(self, parent_pipe, proc):

1423

1718

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

1424

1719

raise NotImplementedError

1425

1720

1721

1426

1722

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1427

1723

socketserver.TCPServer, object):

1428

1724

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

1502

1798

self.enabled = False

1503

1799

self.clients = clients

1504

1800

if self.clients is None:

1505

self.clients = set()

1801

self.clients = {}

1506

1802

self.use_dbus = use_dbus

1507

1803

self.gnutls_priority = gnutls_priority

1508

1804

IPv6_TCPServer.__init__(self, server_address,

1512

1808

def server_activate(self):

1513

1809

if self.enabled:

1514

1810

return socketserver.TCPServer.server_activate(self)

1811

1515

1812

def enable(self):

1516

1813

self.enabled = True

1517

def add_pipe(self, parent_pipe):

1814

1815

def add_pipe(self, parent_pipe, proc):

1518

1816

# Call "handle_ipc" for both data and EOF events

1519

1817

gobject.io_add_watch(parent_pipe.fileno(),

1520

1818

gobject.IO_IN | gobject.IO_HUP,

1521

1819

functools.partial(self.handle_ipc,

1522

parent_pipe = parent_pipe))

1523

1820

parent_pipe =

1821

parent_pipe,

1822

proc = proc))

1823

1524

1824

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

1525

client_object=None):

1825

proc = None, client_object=None):

1526

1826

condition_names = {

1527

1827

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

1528

1828

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

1537

1837

for cond, name in

1538

1838

condition_names.iteritems()

1539

1839

if cond & condition)

1540

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

1840

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

1541

1841

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

1842

# Wait for other process to exit

1843

proc.join()

1542

1844

return False

1543

1845

1544

1846

# Read a request from the child

1549

1851

fpr = request[1]

1550

1852

address = request[2]

1551

1853

1552

for c in self.clients:

1854

for c in self.clients.itervalues():

1553

1855

if c.fingerprint == fpr:

1554

1856

client = c

1555

1857

break

1558

1860

"dress: %s", fpr, address)

1559

1861

if self.use_dbus:

1560

1862

# Emit D-Bus signal

1561

mandos_dbus_service.ClientNotFound(fpr, address[0])

1863

mandos_dbus_service.ClientNotFound(fpr,

1864

address[0])

1562

1865

parent_pipe.send(False)

1563

1866

return False

1564

1867

1565

1868

gobject.io_add_watch(parent_pipe.fileno(),

1566

1869

gobject.IO_IN | gobject.IO_HUP,

1567

1870

functools.partial(self.handle_ipc,

1568

parent_pipe = parent_pipe,

1569

client_object = client))

1871

parent_pipe =

1872

parent_pipe,

1873

proc = proc,

1874

client_object =

1875

client))

1570

1876

parent_pipe.send(True)

1571

# 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

1572

1879

return False

1573

1880

if command == 'funcall':

1574

1881

funcname = request[1]

1575

1882

args = request[2]

1576

1883

kwargs = request[3]

1577

1884

1578

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

1579

1885

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

1886

funcname)(*args,

1887

**kwargs)))

1888

1580

1889

if command == 'getattr':

1581

1890

attrname = request[1]

1582

1891

if callable(client_object.__getattribute__(attrname)):

1583

1892

parent_pipe.send(('function',))

1584

1893

else:

1585

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

1894

parent_pipe.send(('data', client_object

1895

.__getattribute__(attrname)))

1586

1896

1587

1897

if command == 'setattr':

1588

1898

attrname = request[1]

1589

1899

value = request[2]

1590

1900

setattr(client_object, attrname, value)

1591

1901

1592

1902

return True

1593

1903

1594

1904

1631

1941

return timevalue

1632

1942

1633

1943

1634

def if_nametoindex(interface):

1635

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

1636

1637

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

1638

global if_nametoindex

1639

try:

1640

if_nametoindex = (ctypes.cdll.LoadLibrary

1641

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

1642

.if_nametoindex)

1643

except (OSError, AttributeError):

1644

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

1645

def if_nametoindex(interface):

1646

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

1647

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

1648

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

1649

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1650

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

1651

interface))

1652

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

1653

ifreq[16:20])[0]

1654

return interface_index

1655

return if_nametoindex(interface)

1656

1657

1658

1944

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

1659

1945

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

1660

1946

1715

2001

" system bus interface")

1716

2002

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

1717

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

1718

2010

options = parser.parse_args()

1719

2011

1720

2012

if options.check:

1733

2025

"use_dbus": "True",

1734

2026

"use_ipv6": "True",

1735

2027

"debuglevel": "",

2028

"restore": "True",

2029

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

1736

2030

}

1737

2031

1738

2032

# Parse config file for server-global settings

1755

2049

# options, if set.

1756

2050

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

1757

2051

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

1758

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

2052

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

2053

"statedir"):

1759

2054

value = getattr(options, option)

1760

2055

if value is not None:

1761

2056

server_settings[option] = value

1773

2068

debuglevel = server_settings["debuglevel"]

1774

2069

use_dbus = server_settings["use_dbus"]

1775

2070

use_ipv6 = server_settings["use_ipv6"]

1776

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

1777

2083

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

1778

2084

syslogger.setFormatter(logging.Formatter

1779

2085

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

1781

2087

% server_settings["servicename"]))

1782

2088

1783

2089

# Parse config file with clients

1784

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

1785

"extended_timeout": "15m",

1786

"interval": "2m",

1787

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

1788

"host": "",

1789

"approval_delay": "0s",

1790

"approval_duration": "1s",

1791

}

1792

client_config = configparser.SafeConfigParser(client_defaults)

2090

client_config = configparser.SafeConfigParser(Client

2091

.client_defaults)

1793

2092

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

1794

2093

"clients.conf"))

1795

2094

1833

2132

if error[0] != errno.EPERM:

1834

2133

raise error

1835

2134

1836

if not debug and not debuglevel:

1837

syslogger.setLevel(logging.WARNING)

1838

console.setLevel(logging.WARNING)

1839

if debuglevel:

1840

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

1841

syslogger.setLevel(level)

1842

console.setLevel(level)

1843

1844

2135

if debug:

1845

2136

# Enable all possible GnuTLS debugging

1846

2137

1860

2151

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

1861

2152

if null > 2:

1862

2153

os.close(null)

1863

else:

1864

# No console logging

1865

logger.removeHandler(console)

1866

2154

1867

2155

# Need to fork before connecting to D-Bus

1868

2156

if not debug:

1869

2157

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

1870

2158

daemon()

1871

2159

2160

gobject.threads_init()

2161

1872

2162

global main_loop

1873

2163

# From the Avahi example code

1874

2164

DBusGMainLoop(set_as_default=True )

1877

2167

# End of Avahi example code

1878

2168

if use_dbus:

1879

2169

try:

1880

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

2170

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

1881

2171

bus, do_not_queue=True)

2172

old_bus_name = (dbus.service.BusName

2173

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

2174

do_not_queue=True))

1882

2175

except dbus.exceptions.NameExistsException as e:

1883

2176

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

1884

2177

use_dbus = False

1885

2178

server_settings["use_dbus"] = False

1886

2179

tcp_server.use_dbus = False

1887

2180

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1888

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

1889

servicetype = "_mandos._tcp",

1890

protocol = protocol, bus = bus)

2181

service = AvahiServiceToSyslog(name =

2182

server_settings["servicename"],

2183

servicetype = "_mandos._tcp",

2184

protocol = protocol, bus = bus)

1891

2185

if server_settings["interface"]:

1892

2186

service.interface = (if_nametoindex

1893

2187

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

1897

2191

1898

2192

client_class = Client

1899

2193

if use_dbus:

1900

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

1901

def client_config_items(config, section):

1902

special_settings = {

1903

"approved_by_default":

1904

lambda: config.getboolean(section,

1905

"approved_by_default"),

1906

}

1907

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

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))

1908

2263

try:

1909

yield (name, special_settings[name]())

1910

except KeyError:

1911

yield (name, value)

1912

1913

tcp_server.clients.update(set(

1914

client_class(name = section,

1915

config= dict(client_config_items(

1916

client_config, section)))

1917

for section in client_config.sections()))

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

1918

2289

if not tcp_server.clients:

1919

2290

logger.warning("No clients defined")

1920

2291

1931

2302

# "pidfile" was never created

1932

2303

pass

1933

2304

del pidfilename

1934

1935

2305

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

1936

2306

1937

2307

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

1938

2308

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

1939

2309

1942

2312

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

1943

2313

def __init__(self):

1944

2314

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

1945

_interface = "se.bsnet.fukt.Mandos"

2315

_interface = "se.recompile.Mandos"

1946

2316

1947

2317

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

1948

2318

def ClientAdded(self, objpath):

1963

2333

def GetAllClients(self):

1964

2334

"D-Bus method"

1965

2335

return dbus.Array(c.dbus_object_path

1966

for c in tcp_server.clients)

2336

for c in

2337

tcp_server.clients.itervalues())

1967

2338

1968

2339

@dbus.service.method(_interface,

1969

2340

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

1971

2342

"D-Bus method"

1972

2343

return dbus.Dictionary(

1973

2344

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

1974

for c in tcp_server.clients),

2345

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

1975

2346

signature="oa{sv}")

1976

2347

1977

2348

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

1978

2349

def RemoveClient(self, object_path):

1979

2350

"D-Bus method"

1980

for c in tcp_server.clients:

2351

for c in tcp_server.clients.itervalues():

1981

2352

if c.dbus_object_path == object_path:

1982

tcp_server.clients.remove(c)

2353

del tcp_server.clients[c.name]

1983

2354

c.remove_from_connection()

1984

2355

# Don't signal anything except ClientRemoved

1985

2356

c.disable(quiet=True)

1990

2361

1991

2362

del _interface

1992

2363

1993

mandos_dbus_service = MandosDBusService()

2364

class MandosDBusServiceTransitional(MandosDBusService):

2365

__metaclass__ = AlternateDBusNamesMetaclass

2366

mandos_dbus_service = MandosDBusServiceTransitional()

1994

2367

1995

2368

def cleanup():

1996

2369

"Cleanup function; run on exit"

1997

2370

service.cleanup()

1998

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

1999

2425

while tcp_server.clients:

2000

client = tcp_server.clients.pop()

2426

name, client = tcp_server.clients.popitem()

2001

2427

if use_dbus:

2002

2428

client.remove_from_connection()

2003

client.disable_hook = None

2004

2429

# Don't signal anything except ClientRemoved

2005

2430

client.disable(quiet=True)

2006

2431

if use_dbus:

2007

2432

# Emit D-Bus signal

2008

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2433

mandos_dbus_service.ClientRemoved(client

2434

.dbus_object_path,

2009

2435

client.name)

2436

client_settings.clear()

2010

2437

2011

2438

atexit.register(cleanup)

2012

2439

2013

for client in tcp_server.clients:

2440

for client in tcp_server.clients.itervalues():

2014

2441

if use_dbus:

2015

2442

# Emit D-Bus signal

2016

2443

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2017

client.enable()

2444

# Need to initiate checking of clients

2445

if client.enabled:

2446

client.init_checker()

2018

2447

2019

2448

tcp_server.enable()

2020

2449

tcp_server.server_activate()