/mandos/trunk : revision 504

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

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#

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# Everything else is

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#

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

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

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# along with this program. If not, see

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

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#

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

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

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#

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from __future__ import (division, absolute_import, print_function,

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import functools

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import dbus

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import dbus.service

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import ctypes.util

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import xml.dom.minidom

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import inspect

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import GnuPGInterface

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.4.1"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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version = "1.3.1"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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

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"""init logger and add loglevel"""

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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

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pass

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class PGPEngine(object):

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

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def __init__(self):

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self.gnupg = GnuPGInterface.GnuPG()

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

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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

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'--quiet',

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'--no-use-agent'])

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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def encrypt(self, data, password):

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

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with open(os.devnull) as devnull:

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return ciphertext

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def decrypt(self, data, password):

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

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with open(os.devnull) as devnull:

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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decrypted_plaintext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return decrypted_plaintext

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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class AvahiError(Exception):

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

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

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

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

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self.name)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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self.remove()

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try:

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self.add()

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self.entry_group_state_changed))

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'StateChanged', self .entry_group_state_changed))

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

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self.name, self.type)

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self.group.AddService(

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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException):

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dbus.exceptions.DBusException) as e:

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pass

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self.group = None

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self.remove()

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self.server_state_changed)

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

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class AvahiServiceToSyslog(AvahiService):

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def rename(self):

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

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ret = AvahiService.rename(self)

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

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return ret

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def timedelta_to_milliseconds(td):

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def _timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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

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Attributes:

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

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

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

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

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

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

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checker_initiator_tag: a gobject event source tag, or None

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

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client_structure: Object describing what attributes a client has

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and is used for storing the client at exit

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current_checker_command: string; current running checker_command

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

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disable_initiator_tag: a gobject event source tag, or None

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enabled: bool()

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

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

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

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

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last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, or None.

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

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last_enabled: datetime.datetime(); (UTC)

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

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D-Bus identifiers

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

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

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

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

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

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"extended_timeout": "15m",

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"interval": "2m",

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

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"host": "",

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"approval_delay": "0s",

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"approval_duration": "1s",

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"approved_by_default": "True",

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"enabled": "True",

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}

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def timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.timeout)

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return _timedelta_to_milliseconds(self.timeout)

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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.extended_timeout)

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return _timedelta_to_milliseconds(self.extended_timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return timedelta_to_milliseconds(self.interval)

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return _timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

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return timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

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def config_parser(config):

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

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

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with exceptions for any special settings as defined above.

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

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value given the same arguments.

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"""

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settings = {}

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for client_name in config.sections():

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section = dict(config.items(client_name))

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client = settings[client_name] = {}

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

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# Reformat values from string types to Python types

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client["approved_by_default"] = config.getboolean(

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client_name, "approved_by_default")

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

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"enabled")

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

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.replace(" ", ""))

483

if "secret" in section:

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

485

elif "secfile" in section:

486

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

487

(section["secfile"])),

488

"rb") as secfile:

489

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

490

else:

491

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"])

497

client["approval_delay"] = string_to_delta(

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section["approval_delay"])

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client["approval_duration"] = string_to_delta(

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section["approval_duration"])

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

502

client["last_approval_request"] = None

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client["last_checked_ok"] = None

504

client["last_checker_status"] = None

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return settings

507

508

509

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

330

return _timedelta_to_milliseconds(self.approval_delay)

331

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

510

333

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

511

334

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

512

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attribute."""

513

336

self.name = name

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# adding all client settings

515

for setting, value in settings.iteritems():

516

setattr(self, setting, value)

517

518

if self.enabled:

519

if not hasattr(self, "last_enabled"):

520

self.last_enabled = datetime.datetime.utcnow()

521

if not hasattr(self, "expires"):

522

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

523

+ self.timeout)

524

else:

525

self.last_enabled = None

526

self.expires = None

527

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if config is None:

338

config = {}

528

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

529

340

# Uppercase and remove spaces from fingerprint for later

530

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# comparison purposes with return value from the fingerprint()

531

342

# function

343

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

344

.replace(" ", ""))

532

345

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

533

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

534

datetime.datetime.utcnow())

535

536

# attributes specific for this server instance

346

if "secret" in config:

347

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

348

elif "secfile" in config:

349

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

350

(config["secfile"])),

351

"rb") as secfile:

352

self.secret = secfile.read()

353

else:

354

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

355

% self.name)

356

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

357

self.created = datetime.datetime.utcnow()

358

self.enabled = False

359

self.last_approval_request = None

360

self.last_enabled = None

361

self.last_checked_ok = None

362

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

363

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

364

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

365

self.disable_hook = disable_hook

537

366

self.checker = None

538

367

self.checker_initiator_tag = None

539

368

self.disable_initiator_tag = None

369

self.expires = None

540

370

self.checker_callback_tag = None

371

self.checker_command = config["checker"]

541

372

self.current_checker_command = None

542

self.approved = None

373

self.last_connect = None

374

self._approved = None

375

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

376

True)

543

377

self.approvals_pending = 0

544

self.changedstate = (multiprocessing_manager

545

.Condition(multiprocessing_manager

546

.Lock()))

547

self.client_structure = [attr for attr in

548

self.__dict__.iterkeys()

549

if not attr.startswith("_")]

550

self.client_structure.append("client_structure")

551

552

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

553

lambda obj:

554

isinstance(obj,

555

property)):

556

if not name.startswith("_"):

557

self.client_structure.append(name)

378

self.approval_delay = string_to_delta(

379

config["approval_delay"])

380

self.approval_duration = string_to_delta(

381

config["approval_duration"])

382

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

558

383

559

# Send notice to process children that client state has changed

560

384

def send_changedstate(self):

561

with self.changedstate:

562

self.changedstate.notify_all()

563

385

self.changedstate.acquire()

386

self.changedstate.notify_all()

387

self.changedstate.release()

388

564

389

def enable(self):

565

390

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

566

391

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

567

392

# Already enabled

568

393

return

569

394

self.send_changedstate()

395

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

396

# and every interval from then on.

397

self.checker_initiator_tag = (gobject.timeout_add

398

(self.interval_milliseconds(),

399

self.start_checker))

400

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

570

401

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

402

self.disable_initiator_tag = (gobject.timeout_add

403

(self.timeout_milliseconds(),

404

self.disable))

571

405

self.enabled = True

572

406

self.last_enabled = datetime.datetime.utcnow()

573

self.init_checker()

407

# Also start a new checker *right now*.

408

self.start_checker()

574

409

575

410

def disable(self, quiet=True):

576

411

"""Disable this client."""

588

423

gobject.source_remove(self.checker_initiator_tag)

589

424

self.checker_initiator_tag = None

590

425

self.stop_checker()

426

if self.disable_hook:

427

self.disable_hook(self)

591

428

self.enabled = False

592

429

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

593

430

return False

594

431

595

432

def __del__(self):

433

self.disable_hook = None

596

434

self.disable()

597

435

598

def init_checker(self):

599

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

600

# and every interval from then on.

601

self.checker_initiator_tag = (gobject.timeout_add

602

(self.interval_milliseconds(),

603

self.start_checker))

604

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

605

self.disable_initiator_tag = (gobject.timeout_add

606

(self.timeout_milliseconds(),

607

self.disable))

608

# Also start a new checker *right now*.

609

self.start_checker()

610

611

436

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

612

437

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

613

438

self.checker_callback_tag = None

614

439

self.checker = None

615

440

if os.WIFEXITED(condition):

616

self.last_checker_status = os.WEXITSTATUS(condition)

617

if self.last_checker_status == 0:

441

exitstatus = os.WEXITSTATUS(condition)

442

if exitstatus == 0:

618

443

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

619

444

vars(self))

620

445

self.checked_ok()

622

447

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

623

448

vars(self))

624

449

else:

625

self.last_checker_status = -1

626

450

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

627

451

vars(self))

628

452

635

459

if timeout is None:

636

460

timeout = self.timeout

637

461

self.last_checked_ok = datetime.datetime.utcnow()

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

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))

645

467

646

468

def need_approval(self):

647

469

self.last_approval_request = datetime.datetime.utcnow()

804

626

def _get_all_dbus_properties(self):

805

627

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

806

628

"""

807

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

808

for cls in self.__class__.__mro__

629

return ((prop._dbus_name, prop)

809

630

for name, prop in

810

inspect.getmembers(cls, self._is_dbus_property))

631

inspect.getmembers(self, self._is_dbus_property))

811

632

812

633

def _get_dbus_property(self, interface_name, property_name):

813

634

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

814

635

property with the specified name and interface.

815

636

"""

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

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

823

647

# No such property

824

648

raise DBusPropertyNotFound(self.dbus_object_path + ":"

825

649

+ interface_name + "."

862

686

863

687

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

864

688

"""

865

properties = {}

689

all = {}

866

690

for name, prop in self._get_all_dbus_properties():

867

691

if (interface_name

868

692

and interface_name != prop._dbus_interface):

873

697

continue

874

698

value = prop()

875

699

if not hasattr(value, "variant_level"):

876

properties[name] = value

700

all[name] = value

877

701

continue

878

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

879

value.variant_level+1)

880

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

702

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

703

value.variant_level+1)

704

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

881

705

882

706

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

883

707

out_signature="s",

935

759

variant_level=variant_level)

936

760

937

761

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

1036

762

class ClientDBus(Client, DBusObjectWithProperties):

1037

763

"""A Client class using D-Bus

1038

764

1047

773

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

1048

774

1049

775

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

776

self._approvals_pending = 0

1050

777

self.bus = bus

1051

778

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

1052

self._approvals_pending = 0

1053

1054

self._approvals_pending = 0

1055

779

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

1056

780

# the D-Bus

1057

781

client_object_name = unicode(self.name).translate(

1065

789

def notifychangeproperty(transform_func,

1066

790

dbus_name, type_func=lambda x: x,

1067

791

variant_level=1):

1068

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

1069

its changes to DBus.

1070

1071

transform_fun: Function that takes a value and a variant_level

1072

and transforms it to a D-Bus type.

1073

dbus_name: D-Bus name of the variable

792

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

793

changes to DBus.

794

transform_fun: Function that takes a value and transform it to

795

DBus type.

796

dbus_name: DBus name of the variable

1074

797

type_func: Function that transform the value before sending it

1075

to the D-Bus. Default: no transform

1076

variant_level: D-Bus variant level. Default: 1

798

to DBus

799

variant_level: DBus variant level. default: 1

1077

800

"""

1078

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

801

real_value = [None,]

1079

802

def setter(self, value):

803

old_value = real_value[0]

804

real_value[0] = value

1080

805

if hasattr(self, "dbus_object_path"):

1081

if (not hasattr(self, attrname) or

1082

type_func(getattr(self, attrname, None))

1083

!= type_func(value)):

1084

dbus_value = transform_func(type_func(value),

1085

variant_level

1086

=variant_level)

806

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

807

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

808

variant_level)

1087

809

self.PropertyChanged(dbus.String(dbus_name),

1088

810

dbus_value)

1089

setattr(self, attrname, value)

1090

811

1091

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

812

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

1092

813

1093

814

1094

815

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1099

820

last_enabled = notifychangeproperty(datetime_to_dbus,

1100

821

"LastEnabled")

1101

822

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

1102

type_func = lambda checker:

1103

checker is not None)

823

type_func = lambda checker: checker is not None)

1104

824

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1105

825

"LastCheckedOK")

1106

last_approval_request = notifychangeproperty(

1107

datetime_to_dbus, "LastApprovalRequest")

826

last_approval_request = notifychangeproperty(datetime_to_dbus,

827

"LastApprovalRequest")

1108

828

approved_by_default = notifychangeproperty(dbus.Boolean,

1109

829

"ApprovedByDefault")

1110

approval_delay = notifychangeproperty(dbus.UInt64,

1111

"ApprovalDelay",

1112

type_func =

1113

timedelta_to_milliseconds)

1114

approval_duration = notifychangeproperty(

1115

dbus.UInt64, "ApprovalDuration",

1116

type_func = timedelta_to_milliseconds)

830

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

831

type_func = _timedelta_to_milliseconds)

832

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

833

type_func = _timedelta_to_milliseconds)

1117

834

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

1118

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

1119

type_func =

1120

timedelta_to_milliseconds)

1121

extended_timeout = notifychangeproperty(

1122

dbus.UInt64, "ExtendedTimeout",

1123

type_func = timedelta_to_milliseconds)

1124

interval = notifychangeproperty(dbus.UInt64,

1125

"Interval",

1126

type_func =

1127

timedelta_to_milliseconds)

835

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

836

type_func = _timedelta_to_milliseconds)

837

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

838

type_func = _timedelta_to_milliseconds)

839

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

840

type_func = _timedelta_to_milliseconds)

1128

841

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

1129

842

1130

843

del notifychangeproperty

1172

885

return r

1173

886

1174

887

def _reset_approved(self):

1175

self.approved = None

888

self._approved = None

1176

889

return False

1177

890

1178

891

def approve(self, value=True):

1179

892

self.send_changedstate()

1180

self.approved = value

1181

gobject.timeout_add(timedelta_to_milliseconds

893

self._approved = value

894

gobject.timeout_add(_timedelta_to_milliseconds

1182

895

(self.approval_duration),

1183

896

self._reset_approved)

1184

897

1185

898

1186

899

## D-Bus methods, signals & properties

1187

_interface = "se.recompile.Mandos.Client"

900

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

1188

901

1189

902

## Signals

1190

903

1227

940

"D-Bus signal"

1228

941

return self.need_approval()

1229

942

1230

# NeRwequest - signal

1231

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

1232

def NewRequest(self, ip):

1233

"""D-Bus signal

1234

Is sent after a client request a password.

1235

"""

1236

pass

1237

1238

943

## Methods

1239

944

1240

945

# Approve - method

1298

1003

access="readwrite")

1299

1004

def ApprovalDuration_dbus_property(self, value=None):

1300

1005

if value is None: # get

1301

return dbus.UInt64(timedelta_to_milliseconds(

1006

return dbus.UInt64(_timedelta_to_milliseconds(

1302

1007

self.approval_duration))

1303

1008

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

1304

1009

1318

1023

def Host_dbus_property(self, value=None):

1319

1024

if value is None: # get

1320

1025

return dbus.String(self.host)

1321

self.host = unicode(value)

1026

self.host = value

1322

1027

1323

1028

# Created - property

1324

1029

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

1325

1030

def Created_dbus_property(self):

1326

return datetime_to_dbus(self.created)

1031

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

1327

1032

1328

1033

# LastEnabled - property

1329

1034

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

1367

1072

if value is None: # get

1368

1073

return dbus.UInt64(self.timeout_milliseconds())

1369

1074

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

1075

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

1076

return

1370

1077

# Reschedule timeout

1371

if self.enabled:

1372

now = datetime.datetime.utcnow()

1373

time_to_die = timedelta_to_milliseconds(

1374

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

1375

if time_to_die <= 0:

1376

# The timeout has passed

1377

self.disable()

1378

else:

1379

self.expires = (now +

1380

datetime.timedelta(milliseconds =

1381

time_to_die))

1382

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

1383

is None):

1384

return

1385

gobject.source_remove(self.disable_initiator_tag)

1386

self.disable_initiator_tag = (gobject.timeout_add

1387

(time_to_die,

1388

self.disable))

1078

gobject.source_remove(self.disable_initiator_tag)

1079

self.disable_initiator_tag = None

1080

self.expires = None

1081

time_to_die = (self.

1082

_timedelta_to_milliseconds((self

1083

.last_checked_ok

1084

+ self.timeout)

1085

- datetime.datetime

1086

.utcnow()))

1087

if time_to_die <= 0:

1088

# The timeout has passed

1089

self.disable()

1090

else:

1091

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

1092

+ datetime.timedelta(milliseconds = time_to_die))

1093

self.disable_initiator_tag = (gobject.timeout_add

1094

(time_to_die, self.disable))

1389

1095

1390

1096

# ExtendedTimeout - property

1391

1097

@dbus_service_property(_interface, signature="t",

1404

1110

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

1405

1111

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

1406

1112

return

1407

if self.enabled:

1408

# Reschedule checker run

1409

gobject.source_remove(self.checker_initiator_tag)

1410

self.checker_initiator_tag = (gobject.timeout_add

1411

(value, self.start_checker))

1412

self.start_checker() # Start one now, too

1113

# Reschedule checker run

1114

gobject.source_remove(self.checker_initiator_tag)

1115

self.checker_initiator_tag = (gobject.timeout_add

1116

(value, self.start_checker))

1117

self.start_checker() # Start one now, too

1413

1118

1414

1119

# Checker - property

1415

1120

@dbus_service_property(_interface, signature="s",

1417

1122

def Checker_dbus_property(self, value=None):

1418

1123

if value is None: # get

1419

1124

return dbus.String(self.checker_command)

1420

self.checker_command = unicode(value)

1125

self.checker_command = value

1421

1126

1422

1127

# CheckerRunning - property

1423

1128

@dbus_service_property(_interface, signature="b",

1452

1157

raise KeyError()

1453

1158

1454

1159

def __getattribute__(self, name):

1455

if name == '_pipe':

1160

if(name == '_pipe'):

1456

1161

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

1457

1162

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

1458

1163

data = self._pipe.recv()

1465

1170

return func

1466

1171

1467

1172

def __setattr__(self, name, value):

1468

if name == '_pipe':

1173

if(name == '_pipe'):

1469

1174

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

1470

1175

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

1471

1176

1472

1177

1473

class ClientDBusTransitional(ClientDBus):

1474

__metaclass__ = AlternateDBusNamesMetaclass

1475

1476

1477

1178

class ClientHandler(socketserver.BaseRequestHandler, object):

1478

1179

"""A class to handle client connections.

1479

1180

1547

1248

except KeyError:

1548

1249

return

1549

1250

1550

if self.server.use_dbus:

1551

# Emit D-Bus signal

1552

client.NewRequest(str(self.client_address))

1553

1554

1251

if client.approval_delay:

1555

1252

delay = client.approval_delay

1556

1253

client.approvals_pending += 1

1562

1259

client.name)

1563

1260

if self.server.use_dbus:

1564

1261

# Emit D-Bus signal

1565

client.Rejected("Disabled")

1262

client.Rejected("Disabled")

1566

1263

return

1567

1264

1568

if client.approved or not client.approval_delay:

1265

if client._approved or not client.approval_delay:

1569

1266

#We are approved or approval is disabled

1570

1267

break

1571

elif client.approved is None:

1268

elif client._approved is None:

1572

1269

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

1573

1270

client.name)

1574

1271

if self.server.use_dbus:

1585

1282

return

1586

1283

1587

1284

#wait until timeout or approved

1285

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

1588

1286

time = datetime.datetime.now()

1589

1287

client.changedstate.acquire()

1590

(client.changedstate.wait

1591

(float(client.timedelta_to_milliseconds(delay)

1592

/ 1000)))

1288

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

1593

1289

client.changedstate.release()

1594

1290

time2 = datetime.datetime.now()

1595

1291

if (time2 - time) >= delay:

1619

1315

sent_size += sent

1620

1316

1621

1317

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

1622

# bump the timeout using extended_timeout

1318

# bump the timeout as if seen

1623

1319

client.checked_ok(client.extended_timeout)

1624

1320

if self.server.use_dbus:

1625

1321

# Emit D-Bus signal

1693

1389

# Convert the buffer to a Python bytestring

1694

1390

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

1695

1391

# Convert the bytestring to hexadecimal notation

1696

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

1392

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

1697

1393

return hex_fpr

1698

1394

1699

1395

1702

1398

def sub_process_main(self, request, address):

1703

1399

try:

1704

1400

self.finish_request(request, address)

1705

except Exception:

1401

except:

1706

1402

self.handle_error(request, address)

1707

1403

self.close_request(request)

1708

1404

1709

1405

def process_request(self, request, address):

1710

1406

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

1711

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

1712

args = (request,

1713

address))

1714

proc.start()

1715

return proc

1407

multiprocessing.Process(target = self.sub_process_main,

1408

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

1716

1409

1717

1410

1718

1411

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1724

1417

"""

1725

1418

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1726

1419

1727

proc = MultiprocessingMixIn.process_request(self, request,

1728

client_address)

1420

super(MultiprocessingMixInWithPipe,

1421

self).process_request(request, client_address)

1729

1422

self.child_pipe.close()

1730

self.add_pipe(parent_pipe, proc)

1423

self.add_pipe(parent_pipe)

1731

1424

1732

def add_pipe(self, parent_pipe, proc):

1425

def add_pipe(self, parent_pipe):

1733

1426

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

1734

1427

raise NotImplementedError

1735

1428

1813

1506

self.enabled = False

1814

1507

self.clients = clients

1815

1508

if self.clients is None:

1816

self.clients = {}

1509

self.clients = set()

1817

1510

self.use_dbus = use_dbus

1818

1511

self.gnutls_priority = gnutls_priority

1819

1512

IPv6_TCPServer.__init__(self, server_address,

1823

1516

def server_activate(self):

1824

1517

if self.enabled:

1825

1518

return socketserver.TCPServer.server_activate(self)

1826

1827

1519

def enable(self):

1828

1520

self.enabled = True

1829

1830

def add_pipe(self, parent_pipe, proc):

1521

def add_pipe(self, parent_pipe):

1831

1522

# Call "handle_ipc" for both data and EOF events

1832

1523

gobject.io_add_watch(parent_pipe.fileno(),

1833

1524

gobject.IO_IN | gobject.IO_HUP,

1834

1525

functools.partial(self.handle_ipc,

1835

parent_pipe =

1836

parent_pipe,

1837

proc = proc))

1838

1526

parent_pipe = parent_pipe))

1527

1839

1528

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

1840

proc = None, client_object=None):

1529

client_object=None):

1841

1530

condition_names = {

1842

1531

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

1843

1532

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

1852

1541

for cond, name in

1853

1542

condition_names.iteritems()

1854

1543

if cond & condition)

1855

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

1544

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

1856

1545

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

1857

# Wait for other process to exit

1858

proc.join()

1859

1546

return False

1860

1547

1861

1548

# Read a request from the child

1866

1553

fpr = request[1]

1867

1554

address = request[2]

1868

1555

1869

for c in self.clients.itervalues():

1556

for c in self.clients:

1870

1557

if c.fingerprint == fpr:

1871

1558

client = c

1872

1559

break

1875

1562

"dress: %s", fpr, address)

1876

1563

if self.use_dbus:

1877

1564

# Emit D-Bus signal

1878

mandos_dbus_service.ClientNotFound(fpr,

1879

address[0])

1565

mandos_dbus_service.ClientNotFound(fpr, address[0])

1880

1566

parent_pipe.send(False)

1881

1567

return False

1882

1568

1883

1569

gobject.io_add_watch(parent_pipe.fileno(),

1884

1570

gobject.IO_IN | gobject.IO_HUP,

1885

1571

functools.partial(self.handle_ipc,

1886

parent_pipe =

1887

parent_pipe,

1888

proc = proc,

1889

client_object =

1890

client))

1572

parent_pipe = parent_pipe,

1573

client_object = client))

1891

1574

parent_pipe.send(True)

1892

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

1893

# same fileno

1575

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

1894

1576

return False

1895

1577

if command == 'funcall':

1896

1578

funcname = request[1]

1897

1579

args = request[2]

1898

1580

kwargs = request[3]

1899

1581

1900

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

1901

funcname)(*args,

1902

**kwargs)))

1582

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

1903

1583

1904

1584

if command == 'getattr':

1905

1585

attrname = request[1]

1906

1586

if callable(client_object.__getattribute__(attrname)):

1907

1587

parent_pipe.send(('function',))

1908

1588

else:

1909

parent_pipe.send(('data', client_object

1910

.__getattribute__(attrname)))

1589

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

1911

1590

1912

1591

if command == 'setattr':

1913

1592

attrname = request[1]

1956

1635

return timevalue

1957

1636

1958

1637

1638

def if_nametoindex(interface):

1639

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

1640

1641

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

1642

global if_nametoindex

1643

try:

1644

if_nametoindex = (ctypes.cdll.LoadLibrary

1645

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

1646

.if_nametoindex)

1647

except (OSError, AttributeError):

1648

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

1649

def if_nametoindex(interface):

1650

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

1651

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

1652

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

1653

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1654

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

1655

interface))

1656

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

1657

ifreq[16:20])[0]

1658

return interface_index

1659

return if_nametoindex(interface)

1660

1661

1959

1662

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

1960

1663

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

1961

1664

2016

1719

" system bus interface")

2017

1720

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

2018

1721

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

2019

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

2020

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

2021

" state")

2022

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

2023

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

2024

2025

1722

options = parser.parse_args()

2026

1723

2027

1724

if options.check:

2040

1737

"use_dbus": "True",

2041

1738

"use_ipv6": "True",

2042

1739

"debuglevel": "",

2043

"restore": "True",

2044

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

2045

1740

}

2046

1741

2047

1742

# Parse config file for server-global settings

2064

1759

# options, if set.

2065

1760

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

2066

1761

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

2067

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

2068

"statedir"):

1762

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

2069

1763

value = getattr(options, option)

2070

1764

if value is not None:

2071

1765

server_settings[option] = value

2083

1777

debuglevel = server_settings["debuglevel"]

2084

1778

use_dbus = server_settings["use_dbus"]

2085

1779

use_ipv6 = server_settings["use_ipv6"]

2086

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

2087

stored_state_file)

2088

2089

if debug:

2090

initlogger(debug, logging.DEBUG)

2091

else:

2092

if not debuglevel:

2093

initlogger(debug)

2094

else:

2095

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

2096

initlogger(debug, level)

2097

1780

2098

1781

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

2099

1782

syslogger.setFormatter(logging.Formatter

2102

1785

% server_settings["servicename"]))

2103

1786

2104

1787

# Parse config file with clients

2105

client_config = configparser.SafeConfigParser(Client

2106

.client_defaults)

1788

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

1789

"extended_timeout": "15m",

1790

"interval": "2m",

1791

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

1792

"host": "",

1793

"approval_delay": "0s",

1794

"approval_duration": "1s",

1795

}

1796

client_config = configparser.SafeConfigParser(client_defaults)

2107

1797

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

2108

1798

"clients.conf"))

2109

1799

2147

1837

if error[0] != errno.EPERM:

2148

1838

raise error

2149

1839

1840

if not debug and not debuglevel:

1841

syslogger.setLevel(logging.WARNING)

1842

console.setLevel(logging.WARNING)

1843

if debuglevel:

1844

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

1845

syslogger.setLevel(level)

1846

console.setLevel(level)

1847

2150

1848

if debug:

2151

1849

# Enable all possible GnuTLS debugging

2152

1850

2166

1864

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

2167

1865

if null > 2:

2168

1866

os.close(null)

1867

else:

1868

# No console logging

1869

logger.removeHandler(console)

2169

1870

2170

1871

# Need to fork before connecting to D-Bus

2171

1872

if not debug:

2172

1873

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

2173

1874

daemon()

2174

1875

2175

gobject.threads_init()

2176

2177

1876

global main_loop

2178

1877

# From the Avahi example code

2179

1878

DBusGMainLoop(set_as_default=True )

2182

1881

# End of Avahi example code

2183

1882

if use_dbus:

2184

1883

try:

2185

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

1884

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

2186

1885

bus, do_not_queue=True)

2187

old_bus_name = (dbus.service.BusName

2188

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

2189

do_not_queue=True))

2190

1886

except dbus.exceptions.NameExistsException as e:

2191

1887

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

2192

1888

use_dbus = False

2193

1889

server_settings["use_dbus"] = False

2194

1890

tcp_server.use_dbus = False

2195

1891

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2196

service = AvahiServiceToSyslog(name =

2197

server_settings["servicename"],

2198

servicetype = "_mandos._tcp",

2199

protocol = protocol, bus = bus)

1892

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

1893

servicetype = "_mandos._tcp",

1894

protocol = protocol, bus = bus)

2200

1895

if server_settings["interface"]:

2201

1896

service.interface = (if_nametoindex

2202

1897

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

2206

1901

2207

1902

client_class = Client

2208

1903

if use_dbus:

2209

client_class = functools.partial(ClientDBusTransitional,

2210

bus = bus)

2211

2212

client_settings = Client.config_parser(client_config)

2213

old_client_settings = {}

2214

clients_data = {}

2215

2216

# Get client data and settings from last running state.

2217

if server_settings["restore"]:

2218

try:

2219

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

2220

clients_data, old_client_settings = (pickle.load

2221

(stored_state))

2222

os.remove(stored_state_path)

2223

except IOError as e:

2224

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

2225

.format(e))

2226

if e.errno != errno.ENOENT:

2227

raise

2228

except EOFError as e:

2229

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

2230

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

2231

2232

with PGPEngine() as pgp:

2233

for client_name, client in clients_data.iteritems():

2234

# Decide which value to use after restoring saved state.

2235

# We have three different values: Old config file,

2236

# new config file, and saved state.

2237

# New config value takes precedence if it differs from old

2238

# config value, otherwise use saved state.

2239

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

2240

try:

2241

# For each value in new config, check if it

2242

# differs from the old config value (Except for

2243

# the "secret" attribute)

2244

if (name != "secret" and

2245

value != old_client_settings[client_name]

2246

[name]):

2247

client[name] = value

2248

except KeyError:

2249

pass

2250

2251

# Clients who has passed its expire date can still be

2252

# enabled if its last checker was successful. Clients

2253

# whose checker failed before we stored its state is

2254

# assumed to have failed all checkers during downtime.

2255

if client["enabled"]:

2256

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

2257

if not client["last_checked_ok"]:

2258

logger.warning(

2259

"disabling client {0} - Client never "

2260

"performed a successfull checker"

2261

.format(client["name"]))

2262

client["enabled"] = False

2263

elif client["last_checker_status"] != 0:

2264

logger.warning(

2265

"disabling client {0} - Client "

2266

"last checker failed with error code {1}"

2267

.format(client["name"],

2268

client["last_checker_status"]))

2269

client["enabled"] = False

2270

else:

2271

client["expires"] = (datetime.datetime

2272

.utcnow()

2273

+ client["timeout"])

2274

logger.debug("Last checker succeeded,"

2275

" keeping {0} enabled"

2276

.format(client["name"]))

1904

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

1905

def client_config_items(config, section):

1906

special_settings = {

1907

"approved_by_default":

1908

lambda: config.getboolean(section,

1909

"approved_by_default"),

1910

}

1911

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

2277

1912

try:

2278

client["secret"] = (

2279

pgp.decrypt(client["encrypted_secret"],

2280

client_settings[client_name]

2281

["secret"]))

2282

except PGPError:

2283

# If decryption fails, we use secret from new settings

2284

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

2285

.format(client_name))

2286

client["secret"] = (

2287

client_settings[client_name]["secret"])

2288

2289

2290

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

2291

for client_name in (set(old_client_settings)

2292

- set(client_settings)):

2293

del clients_data[client_name]

2294

for client_name in (set(client_settings)

2295

- set(old_client_settings)):

2296

clients_data[client_name] = client_settings[client_name]

2297

2298

# Create clients all clients

2299

for client_name, client in clients_data.iteritems():

2300

tcp_server.clients[client_name] = client_class(

2301

name = client_name, settings = client)

2302

1913

yield (name, special_settings[name]())

1914

except KeyError:

1915

yield (name, value)

1916

1917

tcp_server.clients.update(set(

1918

client_class(name = section,

1919

config= dict(client_config_items(

1920

client_config, section)))

1921

for section in client_config.sections()))

2303

1922

if not tcp_server.clients:

2304

1923

logger.warning("No clients defined")

2305

1924

2316

1935

# "pidfile" was never created

2317

1936

pass

2318

1937

del pidfilename

1938

2319

1939

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

2320

1940

2321

1941

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

2326

1946

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

2327

1947

def __init__(self):

2328

1948

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

2329

_interface = "se.recompile.Mandos"

1949

_interface = "se.bsnet.fukt.Mandos"

2330

1950

2331

1951

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

2332

1952

def ClientAdded(self, objpath):

2347

1967

def GetAllClients(self):

2348

1968

"D-Bus method"

2349

1969

return dbus.Array(c.dbus_object_path

2350

for c in

2351

tcp_server.clients.itervalues())

1970

for c in tcp_server.clients)

2352

1971

2353

1972

@dbus.service.method(_interface,

2354

1973

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

2356

1975

"D-Bus method"

2357

1976

return dbus.Dictionary(

2358

1977

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

2359

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

1978

for c in tcp_server.clients),

2360

1979

signature="oa{sv}")

2361

1980

2362

1981

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

2363

1982

def RemoveClient(self, object_path):

2364

1983

"D-Bus method"

2365

for c in tcp_server.clients.itervalues():

1984

for c in tcp_server.clients:

2366

1985

if c.dbus_object_path == object_path:

2367

del tcp_server.clients[c.name]

1986

tcp_server.clients.remove(c)

2368

1987

c.remove_from_connection()

2369

1988

# Don't signal anything except ClientRemoved

2370

1989

c.disable(quiet=True)

2375

1994

2376

1995

del _interface

2377

1996

2378

class MandosDBusServiceTransitional(MandosDBusService):

2379

__metaclass__ = AlternateDBusNamesMetaclass

2380

mandos_dbus_service = MandosDBusServiceTransitional()

1997

mandos_dbus_service = MandosDBusService()

2381

1998

2382

1999

def cleanup():

2383

2000

"Cleanup function; run on exit"

2384

2001

service.cleanup()

2385

2002

2386

multiprocessing.active_children()

2387

if not (tcp_server.clients or client_settings):

2388

return

2389

2390

# Store client before exiting. Secrets are encrypted with key

2391

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

2392

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

2393

clients = {}

2394

with PGPEngine() as pgp:

2395

for client in tcp_server.clients.itervalues():

2396

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

2397

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

2398

key)

2399

client_dict = {}

2400

2401

# A list of attributes that can not be pickled

2402

# + secret.

2403

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

2404

"checker"))

2405

for name, typ in (inspect.getmembers

2406

(dbus.service.Object)):

2407

exclude.add(name)

2408

2409

client_dict["encrypted_secret"] = (client

2410

.encrypted_secret)

2411

for attr in client.client_structure:

2412

if attr not in exclude:

2413

client_dict[attr] = getattr(client, attr)

2414

2415

clients[client.name] = client_dict

2416

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

2417

2418

try:

2419

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

2420

prefix="clients-",

2421

dir=os.path.dirname

2422

(stored_state_path))

2423

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

2424

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

2425

os.rename(tempname, stored_state_path)

2426

except (IOError, OSError) as e:

2427

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

2428

.format(e))

2429

if not debug:

2430

try:

2431

os.remove(tempname)

2432

except NameError:

2433

pass

2434

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

2435

errno.EEXIST)):

2436

raise e

2437

2438

# Delete all clients, and settings from config

2439

2003

while tcp_server.clients:

2440

name, client = tcp_server.clients.popitem()

2004

client = tcp_server.clients.pop()

2441

2005

if use_dbus:

2442

2006

client.remove_from_connection()

2007

client.disable_hook = None

2443

2008

# Don't signal anything except ClientRemoved

2444

2009

client.disable(quiet=True)

2445

2010

if use_dbus:

2446

2011

# Emit D-Bus signal

2447

mandos_dbus_service.ClientRemoved(client

2448

.dbus_object_path,

2012

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2449

2013

client.name)

2450

client_settings.clear()

2451

2014

2452

2015

atexit.register(cleanup)

2453

2016

2454

for client in tcp_server.clients.itervalues():

2017

for client in tcp_server.clients:

2455

2018

if use_dbus:

2456

2019

# Emit D-Bus signal

2457

2020

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2458

# Need to initiate checking of clients

2459

if client.enabled:

2460

client.init_checker()

2021

client.enable()

2461

2022

2462

2023

tcp_server.enable()

2463

2024

tcp_server.server_activate()

2503

2064

# Must run before the D-Bus bus name gets deregistered

2504

2065

cleanup()

2505

2066

2067

2506

2068

if __name__ == '__main__':

2507

2069

main()