/mandos/trunk : revision 24.1.186

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#!/usr/bin/python2.7

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#!/usr/bin/python

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# -*- mode: python; coding: utf-8 -*-

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#

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# Mandos server - give out binary blobs to connecting clients.

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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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unicode_literals)

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from future_builtins import *

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import SocketServer as socketserver

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import socket

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import argparse

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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 itertools

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import collections

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import dbus

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import dbus.service

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except ImportError:

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.6.9"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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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(b"16s16x", interface))

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interface_index = struct.unpack("I", 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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global syslogger

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syslogger = (logging.handlers.SysLogHandler

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(facility =

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logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/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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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.tempdir = tempfile.mkdtemp(prefix="mandos-")

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self.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--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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encoded = b"mandos" + binascii.hexlify(password)

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if len(encoded) > 2048:

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# GnuPG can't handle long passwords, so encode differently

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encoded = (b"mandos" + password.replace(b"\\", b"\\\\")

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.replace(b"\n", b"\\n")

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.replace(b"\0", b"\\x00"))

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir=self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen(['gpg', '--symmetric',

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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ciphertext, err = proc.communicate(input = data)

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir = self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen(['gpg', '--decrypt',

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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decrypted_plaintext, err = proc.communicate(input

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= data)

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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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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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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self.value = value

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return super(AvahiError, self).__init__(value, *args,

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**kwargs)

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super(AvahiError, self).__init__(value, *args, **kwargs)

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def __unicode__(self):

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return unicode(repr(self.value))

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class AvahiServiceError(AvahiError):

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pass

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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type: string; Example: '_mandos._tcp'.

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See <https://www.iana.org/assignments/service-names-port-numbers>

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See <http://www.dns-sd.org/ServiceTypes.html>

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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domain: string; Domain to publish on, default to .local if empty.

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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def __init__(self, interface = avahi.IF_UNSPEC, name = None,

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servicetype = None, port = None, TXT = None,

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domain = "", host = "", max_renames = 32768,

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self, remove=True):

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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logger.critical("No suitable Zeroconf service name found"

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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 = str(self.server

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.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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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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if remove:

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self.remove()

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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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except dbus.exceptions.DBusException as error:

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if (error.get_dbus_name()

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== "org.freedesktop.Avahi.CollisionError"):

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logger.info("Local Zeroconf service name collision.")

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return self.rename(remove=False)

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else:

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logger.critical("D-Bus Exception", exc_info=error)

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self.cleanup()

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os._exit(1)

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logger.critical("DBusException: %s", error)

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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def remove(self):

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

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

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def add(self):

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

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self.remove()

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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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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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logger.debug("Avahi entry group state change: %i", state)

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self.rename()

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elif state == avahi.ENTRY_GROUP_FAILURE:

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logger.critical("Avahi: Error in group state changed %s",

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str(error))

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raise AvahiGroupError("State changed: {!s}"

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.format(error))

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unicode(error))

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raise AvahiGroupError("State changed: %s"

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% unicode(error))

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def cleanup(self):

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

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if self.group is not None:

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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException):

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

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

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logger.debug("Avahi server state change: %i", state)

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

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else:

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

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def activate(self):

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

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if self.server is None:

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

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class AvahiServiceToSyslog(AvahiService):

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

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

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ret = AvahiService.rename(self, *args, **kwargs)

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syslogger.setFormatter(logging.Formatter

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('Mandos ({}) [%(process)d]:'

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

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.format(self.name)))

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return ret

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def _timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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class Client(object):

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

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Attributes:

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

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

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

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

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

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

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checker_initiator_tag: a gobject event source tag, or None

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

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client_structure: Object describing what attributes a client has

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and is used for storing the client at exit

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current_checker_command: string; current running checker_command

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

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disable_initiator_tag: a gobject event source tag, or None

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enabled: bool()

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

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

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

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

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last_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, -2 means no checker completed yet.

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

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last_enabled: datetime.datetime(); (UTC)

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

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D-Bus identifiers

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

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timeout: datetime.timedelta(); How long from last_checked_ok

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until this client is disabled

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extended_timeout: extra long timeout when secret has been sent

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extended_timeout: extra long timeout when password has been sent

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runtime_expansions: Allowed attributes for runtime expansion.

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

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disabled, or None

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server_settings: The server_settings dict from main()

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"""

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runtime_expansions = ("approval_delay", "approval_duration",

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"created", "enabled", "expires",

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"fingerprint", "host", "interval",

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"last_approval_request", "last_checked_ok",

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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": "PT5M",

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"extended_timeout": "PT15M",

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"interval": "PT2M",

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

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"host": "",

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"approval_delay": "PT0S",

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"approval_duration": "PT1S",

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"approved_by_default": "True",

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"enabled": "True",

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}

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@staticmethod

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def config_parser(config):

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

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

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with exceptions for any special settings as defined above.

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

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value given the same arguments.

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"""

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settings = {}

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for client_name in config.sections():

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section = dict(config.items(client_name))

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client = settings[client_name] = {}

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

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# Reformat values from string types to Python types

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client["approved_by_default"] = config.getboolean(

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client_name, "approved_by_default")

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

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"enabled")

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

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.replace(" ", ""))

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if "secret" in section:

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

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elif "secfile" in section:

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

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(section["secfile"])),

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"rb") as secfile:

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

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else:

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raise TypeError("No secret or secfile for section {}"

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.format(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"] = -2

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return settings

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

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

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

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attribute."""

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self.name = name

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if server_settings is None:

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server_settings = {}

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self.server_settings = server_settings

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# adding all client settings

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for setting, value in settings.items():

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setattr(self, setting, value)

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if self.enabled:

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if not hasattr(self, "last_enabled"):

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self.last_enabled = datetime.datetime.utcnow()

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if not hasattr(self, "expires"):

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

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+ self.timeout)

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else:

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self.last_enabled = None

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self.expires = None

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if config is None:

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config = {}

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

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# Uppercase and remove spaces from fingerprint for later

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# comparison purposes with return value from the fingerprint()

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# function

344

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

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.replace(" ", ""))

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

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

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datetime.datetime.utcnow())

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# attributes specific for this server instance

347

if "secret" in config:

348

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

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elif "secfile" in config:

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

351

(config["secfile"])),

352

"rb") as secfile:

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self.secret = secfile.read()

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else:

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

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% self.name)

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

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self.created = datetime.datetime.utcnow()

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self.enabled = False

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self.last_approval_request = None

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self.last_enabled = None

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self.last_checked_ok = None

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

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

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

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self.disable_hook = disable_hook

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self.checker = None

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self.checker_initiator_tag = None

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self.disable_initiator_tag = None

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self.expires = None

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self.checker_callback_tag = None

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self.checker_command = config["checker"]

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self.current_checker_command = None

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self.approved = None

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self.last_connect = None

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self._approved = None

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

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True)

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self.approvals_pending = 0

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self.changedstate = (multiprocessing_manager

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.Condition(multiprocessing_manager

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.Lock()))

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self.client_structure = [attr for attr in

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self.__dict__.iterkeys()

557

if not attr.startswith("_")]

558

self.client_structure.append("client_structure")

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

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lambda obj:

562

isinstance(obj,

563

property)):

564

if not name.startswith("_"):

565

self.client_structure.append(name)

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self.approval_delay = string_to_delta(

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config["approval_delay"])

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self.approval_duration = string_to_delta(

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config["approval_duration"])

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

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# Send notice to process children that client state has changed

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def send_changedstate(self):

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with self.changedstate:

570

self.changedstate.notify_all()

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self.changedstate.acquire()

387

self.changedstate.notify_all()

388

self.changedstate.release()

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def enable(self):

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

574

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

575

393

# Already enabled

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return

395

self.send_changedstate()

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

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# and every interval from then on.

398

self.checker_initiator_tag = (gobject.timeout_add

399

(self.interval_milliseconds(),

400

self.start_checker))

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

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

403

self.disable_initiator_tag = (gobject.timeout_add

404

(self.timeout_milliseconds(),

405

self.disable))

578

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self.enabled = True

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407

self.last_enabled = datetime.datetime.utcnow()

580

self.init_checker()

581

self.send_changedstate()

408

# Also start a new checker *right now*.

409

self.start_checker()

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def disable(self, quiet=True):

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412

"""Disable this client."""

585

413

if not getattr(self, "enabled", False):

586

414

return False

587

415

if not quiet:

416

self.send_changedstate()

417

if not quiet:

588

418

logger.info("Disabling client %s", self.name)

589

if getattr(self, "disable_initiator_tag", None) is not None:

419

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

590

420

gobject.source_remove(self.disable_initiator_tag)

591

421

self.disable_initiator_tag = None

592

422

self.expires = None

593

if getattr(self, "checker_initiator_tag", None) is not None:

423

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

594

424

gobject.source_remove(self.checker_initiator_tag)

595

425

self.checker_initiator_tag = None

596

426

self.stop_checker()

427

if self.disable_hook:

428

self.disable_hook(self)

597

429

self.enabled = False

598

if not quiet:

599

self.send_changedstate()

600

430

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

601

431

return False

602

432

603

433

def __del__(self):

434

self.disable_hook = None

604

435

self.disable()

605

436

606

def init_checker(self):

607

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

608

# and every interval from then on.

609

if self.checker_initiator_tag is not None:

610

gobject.source_remove(self.checker_initiator_tag)

611

self.checker_initiator_tag = (gobject.timeout_add

612

(int(self.interval

613

.total_seconds() * 1000),

614

self.start_checker))

615

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

616

if self.disable_initiator_tag is not None:

617

gobject.source_remove(self.disable_initiator_tag)

618

self.disable_initiator_tag = (gobject.timeout_add

619

(int(self.timeout

620

.total_seconds() * 1000),

621

self.disable))

622

# Also start a new checker *right now*.

623

self.start_checker()

624

625

437

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

626

438

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

627

439

self.checker_callback_tag = None

628

440

self.checker = None

629

441

if os.WIFEXITED(condition):

630

self.last_checker_status = os.WEXITSTATUS(condition)

631

if self.last_checker_status == 0:

442

exitstatus = os.WEXITSTATUS(condition)

443

if exitstatus == 0:

632

444

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

633

445

vars(self))

634

446

self.checked_ok()

636

448

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

637

449

vars(self))

638

450

else:

639

self.last_checker_status = -1

640

451

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

641

452

vars(self))

642

453

643

def checked_ok(self):

644

"""Assert that the client has been seen, alive and well."""

645

self.last_checked_ok = datetime.datetime.utcnow()

646

self.last_checker_status = 0

647

self.bump_timeout()

648

649

def bump_timeout(self, timeout=None):

650

"""Bump up the timeout for this client."""

454

def checked_ok(self, timeout=None):

455

"""Bump up the timeout for this client.

456

457

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

458

alive and well.

459

"""

651

460

if timeout is None:

652

461

timeout = self.timeout

653

if self.disable_initiator_tag is not None:

654

gobject.source_remove(self.disable_initiator_tag)

655

self.disable_initiator_tag = None

656

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

657

self.disable_initiator_tag = (gobject.timeout_add

658

(int(timeout.total_seconds()

659

* 1000), self.disable))

660

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

462

self.last_checked_ok = datetime.datetime.utcnow()

463

gobject.source_remove(self.disable_initiator_tag)

464

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

465

self.disable_initiator_tag = (gobject.timeout_add

466

(_timedelta_to_milliseconds(timeout),

467

self.disable))

661

468

662

469

def need_approval(self):

663

470

self.last_approval_request = datetime.datetime.utcnow()

668

475

If a checker already exists, leave it running and do

669

476

nothing."""

670

477

# The reason for not killing a running checker is that if we

671

# did that, and if a checker (for some reason) started running

672

# slowly and taking more than 'interval' time, then the client

673

# would inevitably timeout, since no checker would get a

674

# chance to run to completion. If we instead leave running

478

# did that, then if a checker (for some reason) started

479

# running slowly and taking more than 'interval' time, the

480

# client would inevitably timeout, since no checker would get

481

# a chance to run to completion. If we instead leave running

675

482

# checkers alone, the checker would have to take more time

676

483

# than 'timeout' for the client to be disabled, which is as it

677

484

# should be.

679

486

# If a checker exists, make sure it is not a zombie

680

487

try:

681

488

pid, status = os.waitpid(self.checker.pid, os.WNOHANG)

682

except AttributeError:

683

pass

684

except OSError as error:

685

if error.errno != errno.ECHILD:

686

raise

489

except (AttributeError, OSError) as error:

490

if (isinstance(error, OSError)

491

and error.errno != errno.ECHILD):

492

raise error

687

493

else:

688

494

if pid:

689

495

logger.warning("Checker was a zombie")

692

498

self.current_checker_command)

693

499

# Start a new checker if needed

694

500

if self.checker is None:

695

# Escape attributes for the shell

696

escaped_attrs = { attr:

697

re.escape(str(getattr(self, attr)))

698

for attr in self.runtime_expansions }

699

501

try:

700

command = self.checker_command % escaped_attrs

701

except TypeError as error:

702

logger.error('Could not format string "%s"',

703

self.checker_command, exc_info=error)

704

return True # Try again later

502

# In case checker_command has exactly one % operator

503

command = self.checker_command % self.host

504

except TypeError:

505

# Escape attributes for the shell

506

escaped_attrs = dict(

507

(attr,

508

re.escape(unicode(str(getattr(self, attr, "")),

509

errors=

510

'replace')))

511

for attr in

512

self.runtime_expansions)

513

514

try:

515

command = self.checker_command % escaped_attrs

516

except TypeError as error:

517

logger.error('Could not format string "%s":'

518

' %s', self.checker_command, error)

519

return True # Try again later

705

520

self.current_checker_command = command

706

521

try:

707

522

logger.info("Starting checker %r for %s",

710

525

# in normal mode, that is already done by daemon(),

711

526

# and in debug mode we don't want to. (Stdin is

712

527

# always replaced by /dev/null.)

713

# The exception is when not debugging but nevertheless

714

# running in the foreground; use the previously

715

# created wnull.

716

popen_args = {}

717

if (not self.server_settings["debug"]

718

and self.server_settings["foreground"]):

719

popen_args.update({"stdout": wnull,

720

"stderr": wnull })

721

528

self.checker = subprocess.Popen(command,

722

529

close_fds=True,

723

shell=True, cwd="/",

724

**popen_args)

725

except OSError as error:

726

logger.error("Failed to start subprocess",

727

exc_info=error)

728

return True

729

self.checker_callback_tag = (gobject.child_watch_add

730

(self.checker.pid,

731

self.checker_callback,

732

data=command))

733

# The checker may have completed before the gobject

734

# watch was added. Check for this.

735

try:

530

shell=True, cwd="/")

531

self.checker_callback_tag = (gobject.child_watch_add

532

(self.checker.pid,

533

self.checker_callback,

534

data=command))

535

# The checker may have completed before the gobject

536

# watch was added. Check for this.

736

537

pid, status = os.waitpid(self.checker.pid, os.WNOHANG)

538

if pid:

539

gobject.source_remove(self.checker_callback_tag)

540

self.checker_callback(pid, status, command)

737

541

except OSError as error:

738

if error.errno == errno.ECHILD:

739

# This should never happen

740

logger.error("Child process vanished",

741

exc_info=error)

742

return True

743

raise

744

if pid:

745

gobject.source_remove(self.checker_callback_tag)

746

self.checker_callback(pid, status, command)

542

logger.error("Failed to start subprocess: %s",

543

error)

747

544

# Re-run this periodically if run by gobject.timeout_add

748

545

return True

749

546

756

553

return

757

554

logger.debug("Stopping checker for %(name)s", vars(self))

758

555

try:

759

self.checker.terminate()

556

os.kill(self.checker.pid, signal.SIGTERM)

760

557

#time.sleep(0.5)

761

558

#if self.checker.poll() is None:

762

# self.checker.kill()

559

# os.kill(self.checker.pid, signal.SIGKILL)

763

560

except OSError as error:

764

561

if error.errno != errno.ESRCH: # No such process

765

562

raise

782

579

# "Set" method, so we fail early here:

783

580

if byte_arrays and signature != "ay":

784

581

raise ValueError("Byte arrays not supported for non-'ay'"

785

" signature {!r}".format(signature))

582

" signature %r" % signature)

786

583

def decorator(func):

787

584

func._dbus_is_property = True

788

585

func._dbus_interface = dbus_interface

796

593

return decorator

797

594

798

595

799

def dbus_interface_annotations(dbus_interface):

800

"""Decorator for marking functions returning interface annotations

801

802

Usage:

803

804

@dbus_interface_annotations("org.example.Interface")

805

def _foo(self): # Function name does not matter

806

return {"org.freedesktop.DBus.Deprecated": "true",

807

"org.freedesktop.DBus.Property.EmitsChangedSignal":

808

"false"}

809

"""

810

def decorator(func):

811

func._dbus_is_interface = True

812

func._dbus_interface = dbus_interface

813

func._dbus_name = dbus_interface

814

return func

815

return decorator

816

817

818

def dbus_annotations(annotations):

819

"""Decorator to annotate D-Bus methods, signals or properties

820

Usage:

821

822

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true",

823

"org.freedesktop.DBus.Property."

824

"EmitsChangedSignal": "false"})

825

@dbus_service_property("org.example.Interface", signature="b",

826

access="r")

827

def Property_dbus_property(self):

828

return dbus.Boolean(False)

829

"""

830

def decorator(func):

831

func._dbus_annotations = annotations

832

return func

833

return decorator

834

835

836

596

class DBusPropertyException(dbus.exceptions.DBusException):

837

597

"""A base class for D-Bus property-related exceptions

838

598

"""

839

pass

599

def __unicode__(self):

600

return unicode(str(self))

601

840

602

841

603

class DBusPropertyAccessException(DBusPropertyException):

842

604

"""A property's access permissions disallows an operation.

859

621

"""

860

622

861

623

@staticmethod

862

def _is_dbus_thing(thing):

863

"""Returns a function testing if an attribute is a D-Bus thing

864

865

If called like _is_dbus_thing("method") it returns a function

866

suitable for use as predicate to inspect.getmembers().

867

"""

868

return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),

869

False)

624

def _is_dbus_property(obj):

625

return getattr(obj, "_dbus_is_property", False)

870

626

871

def _get_all_dbus_things(self, thing):

627

def _get_all_dbus_properties(self):

872

628

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

873

629

"""

874

return ((getattr(athing.__get__(self), "_dbus_name",

875

name),

876

athing.__get__(self))

630

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

877

631

for cls in self.__class__.__mro__

878

for name, athing in

879

inspect.getmembers(cls,

880

self._is_dbus_thing(thing)))

632

for name, prop in inspect.getmembers(cls, self._is_dbus_property))

881

633

882

634

def _get_dbus_property(self, interface_name, property_name):

883

635

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

884

636

property with the specified name and interface.

885

637

"""

886

638

for cls in self.__class__.__mro__:

887

for name, value in (inspect.getmembers

888

(cls,

889

self._is_dbus_thing("property"))):

890

if (value._dbus_name == property_name

891

and value._dbus_interface == interface_name):

639

for name, value in inspect.getmembers(cls, self._is_dbus_property):

640

if value._dbus_name == property_name and value._dbus_interface == interface_name:

892

641

return value.__get__(self)

893

642

894

643

# No such property

895

644

raise DBusPropertyNotFound(self.dbus_object_path + ":"

896

645

+ interface_name + "."

897

646

+ property_name)

647

898

648

899

649

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

900

650

out_signature="v")

920

670

# The byte_arrays option is not supported yet on

921

671

# signatures other than "ay".

922

672

if prop._dbus_signature != "ay":

923

raise ValueError("Byte arrays not supported for non-"

924

"'ay' signature {!r}"

925

.format(prop._dbus_signature))

926

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

927

for byte in value))

673

raise ValueError

674

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

675

for byte in value))

928

676

prop(value)

929

677

930

678

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

935

683

936

684

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

937

685

"""

938

properties = {}

939

for name, prop in self._get_all_dbus_things("property"):

686

all = {}

687

for name, prop in self._get_all_dbus_properties():

940

688

if (interface_name

941

689

and interface_name != prop._dbus_interface):

942

690

# Interface non-empty but did not match

946

694

continue

947

695

value = prop()

948

696

if not hasattr(value, "variant_level"):

949

properties[name] = value

697

all[name] = value

950

698

continue

951

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

952

value.variant_level+1)

953

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

954

955

@dbus.service.signal(dbus.PROPERTIES_IFACE, signature="sa{sv}as")

956

def PropertiesChanged(self, interface_name, changed_properties,

957

invalidated_properties):

958

"""Standard D-Bus PropertiesChanged() signal, see D-Bus

959

standard.

960

"""

961

pass

699

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

700

value.variant_level+1)

701

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

962

702

963

703

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

964

704

out_signature="s",

965

705

path_keyword='object_path',

966

706

connection_keyword='connection')

967

707

def Introspect(self, object_path, connection):

968

"""Overloading of standard D-Bus method.

969

970

Inserts property tags and interface annotation tags.

708

"""Standard D-Bus method, overloaded to insert property tags.

971

709

"""

972

710

xmlstring = dbus.service.Object.Introspect(self, object_path,

973

711

connection)

980

718

e.setAttribute("access", prop._dbus_access)

981

719

return e

982

720

for if_tag in document.getElementsByTagName("interface"):

983

# Add property tags

984

721

for tag in (make_tag(document, name, prop)

985

722

for name, prop

986

in self._get_all_dbus_things("property")

723

in self._get_all_dbus_properties()

987

724

if prop._dbus_interface

988

725

== if_tag.getAttribute("name")):

989

726

if_tag.appendChild(tag)

990

# Add annotation tags

991

for typ in ("method", "signal", "property"):

992

for tag in if_tag.getElementsByTagName(typ):

993

annots = dict()

994

for name, prop in (self.

995

_get_all_dbus_things(typ)):

996

if (name == tag.getAttribute("name")

997

and prop._dbus_interface

998

== if_tag.getAttribute("name")):

999

annots.update(getattr

1000

(prop,

1001

"_dbus_annotations",

1002

{}))

1003

for name, value in annots.items():

1004

ann_tag = document.createElement(

1005

"annotation")

1006

ann_tag.setAttribute("name", name)

1007

ann_tag.setAttribute("value", value)

1008

tag.appendChild(ann_tag)

1009

# Add interface annotation tags

1010

for annotation, value in dict(

1011

itertools.chain.from_iterable(

1012

annotations().items()

1013

for name, annotations in

1014

self._get_all_dbus_things("interface")

1015

if name == if_tag.getAttribute("name")

1016

)).items():

1017

ann_tag = document.createElement("annotation")

1018

ann_tag.setAttribute("name", annotation)

1019

ann_tag.setAttribute("value", value)

1020

if_tag.appendChild(ann_tag)

1021

727

# Add the names to the return values for the

1022

728

# "org.freedesktop.DBus.Properties" methods

1023

729

if (if_tag.getAttribute("name")

1038

744

except (AttributeError, xml.dom.DOMException,

1039

745

xml.parsers.expat.ExpatError) as error:

1040

746

logger.error("Failed to override Introspection method",

1041

exc_info=error)

747

error)

1042

748

return xmlstring

1043

749

1044

750

1045

def datetime_to_dbus(dt, variant_level=0):

751

def datetime_to_dbus (dt, variant_level=0):

1046

752

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

1047

753

if dt is None:

1048

754

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

1049

755

return dbus.String(dt.isoformat(),

1050

756

variant_level=variant_level)

1051

757

1052

1053

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1054

"""A class decorator; applied to a subclass of

1055

dbus.service.Object, it will add alternate D-Bus attributes with

1056

interface names according to the "alt_interface_names" mapping.

1057

Usage:

1058

1059

@alternate_dbus_interfaces({"org.example.Interface":

1060

"net.example.AlternateInterface"})

1061

class SampleDBusObject(dbus.service.Object):

1062

@dbus.service.method("org.example.Interface")

1063

def SampleDBusMethod():

1064

pass

1065

1066

The above "SampleDBusMethod" on "SampleDBusObject" will be

1067

reachable via two interfaces: "org.example.Interface" and

1068

"net.example.AlternateInterface", the latter of which will have

1069

its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to

1070

"true", unless "deprecate" is passed with a False value.

1071

1072

This works for methods and signals, and also for D-Bus properties

1073

(from DBusObjectWithProperties) and interfaces (from the

1074

dbus_interface_annotations decorator).

1075

"""

1076

def wrapper(cls):

1077

for orig_interface_name, alt_interface_name in (

1078

alt_interface_names.items()):

1079

attr = {}

1080

interface_names = set()

1081

# Go though all attributes of the class

1082

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

1083

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

1084

# with the wrong interface name

1085

if (not hasattr(attribute, "_dbus_interface")

1086

or not attribute._dbus_interface

1087

.startswith(orig_interface_name)):

1088

continue

1089

# Create an alternate D-Bus interface name based on

1090

# the current name

1091

alt_interface = (attribute._dbus_interface

1092

.replace(orig_interface_name,

1093

alt_interface_name))

1094

interface_names.add(alt_interface)

1095

# Is this a D-Bus signal?

1096

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

1097

# Extract the original non-method undecorated

1098

# function by black magic

1099

nonmethod_func = (dict(

1100

zip(attribute.func_code.co_freevars,

1101

attribute.__closure__))["func"]

1102

.cell_contents)

1103

# Create a new, but exactly alike, function

1104

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

1105

# with the alternate D-Bus interface name

1106

new_function = (dbus.service.signal

1107

(alt_interface,

1108

attribute._dbus_signature)

1109

(types.FunctionType(

1110

nonmethod_func.func_code,

1111

nonmethod_func.func_globals,

1112

nonmethod_func.func_name,

1113

nonmethod_func.func_defaults,

1114

nonmethod_func.func_closure)))

1115

# Copy annotations, if any

1116

try:

1117

new_function._dbus_annotations = (

1118

dict(attribute._dbus_annotations))

1119

except AttributeError:

1120

pass

1121

# Define a creator of a function to call both the

1122

# original and alternate functions, so both the

1123

# original and alternate signals gets sent when

1124

# the function is called

1125

def fixscope(func1, func2):

1126

"""This function is a scope container to pass

1127

func1 and func2 to the "call_both" function

1128

outside of its arguments"""

1129

def call_both(*args, **kwargs):

1130

"""This function will emit two D-Bus

1131

signals by calling func1 and func2"""

1132

func1(*args, **kwargs)

1133

func2(*args, **kwargs)

1134

return call_both

1135

# Create the "call_both" function and add it to

1136

# the class

1137

attr[attrname] = fixscope(attribute, new_function)

1138

# Is this a D-Bus method?

1139

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

1140

# Create a new, but exactly alike, function

1141

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

1142

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

1143

# to the class.

1144

attr[attrname] = (dbus.service.method

1145

(alt_interface,

1146

attribute._dbus_in_signature,

1147

attribute._dbus_out_signature)

1148

(types.FunctionType

1149

(attribute.func_code,

1150

attribute.func_globals,

1151

attribute.func_name,

1152

attribute.func_defaults,

1153

attribute.func_closure)))

1154

# Copy annotations, if any

1155

try:

1156

attr[attrname]._dbus_annotations = (

1157

dict(attribute._dbus_annotations))

1158

except AttributeError:

1159

pass

1160

# Is this a D-Bus property?

1161

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

1162

# Create a new, but exactly alike, function

1163

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

1164

# property with the alternate D-Bus interface

1165

# name. Add it to the class.

1166

attr[attrname] = (dbus_service_property

1167

(alt_interface,

1168

attribute._dbus_signature,

1169

attribute._dbus_access,

1170

attribute

1171

._dbus_get_args_options

1172

["byte_arrays"])

1173

(types.FunctionType

1174

(attribute.func_code,

1175

attribute.func_globals,

1176

attribute.func_name,

1177

attribute.func_defaults,

1178

attribute.func_closure)))

1179

# Copy annotations, if any

1180

try:

1181

attr[attrname]._dbus_annotations = (

1182

dict(attribute._dbus_annotations))

1183

except AttributeError:

1184

pass

1185

# Is this a D-Bus interface?

1186

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

1187

# Create a new, but exactly alike, function

1188

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

1189

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

1190

# to the class.

1191

attr[attrname] = (dbus_interface_annotations

1192

(alt_interface)

1193

(types.FunctionType

1194

(attribute.func_code,

1195

attribute.func_globals,

1196

attribute.func_name,

1197

attribute.func_defaults,

1198

attribute.func_closure)))

1199

if deprecate:

1200

# Deprecate all alternate interfaces

1201

iname="_AlternateDBusNames_interface_annotation{}"

1202

for interface_name in interface_names:

1203

@dbus_interface_annotations(interface_name)

1204

def func(self):

1205

return { "org.freedesktop.DBus.Deprecated":

1206

"true" }

1207

# Find an unused name

1208

for aname in (iname.format(i)

1209

for i in itertools.count()):

1210

if aname not in attr:

1211

attr[aname] = func

1212

break

1213

if interface_names:

1214

# Replace the class with a new subclass of it with

1215

# methods, signals, etc. as created above.

1216

cls = type(b"{}Alternate".format(cls.__name__),

1217

(cls,), attr)

1218

return cls

1219

return wrapper

1220

1221

1222

@alternate_dbus_interfaces({"se.recompile.Mandos":

1223

"se.bsnet.fukt.Mandos"})

758

class transitional_dbus_metaclass(DBusObjectWithProperties.__metaclass__):

759

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

760

for attrname, old_dbusobj in inspect.getmembers(bases[0]):

761

new_interface = getattr(old_dbusobj, "_dbus_interface", "").replace("se.bsnet.fukt.", "se.recompile.")

762

if (getattr(old_dbusobj, "_dbus_is_signal", False)

763

and old_dbusobj._dbus_interface.startswith("se.bsnet.fukt.Mandos")):

764

unwrappedfunc = dict(zip(old_dbusobj.func_code.co_freevars,

765

old_dbusobj.__closure__))["func"].cell_contents

766

newfunc = types.FunctionType(unwrappedfunc.func_code,

767

unwrappedfunc.func_globals,

768

unwrappedfunc.func_name,

769

unwrappedfunc.func_defaults,

770

unwrappedfunc.func_closure)

771

new_dbusfunc = dbus.service.signal(

772

new_interface, old_dbusobj._dbus_signature)(newfunc)

773

attr["_transitional_" + attrname] = new_dbusfunc

774

775

def fixscope(func1, func2):

776

def newcall(*args, **kwargs):

777

func1(*args, **kwargs)

778

func2(*args, **kwargs)

779

return newcall

780

781

attr[attrname] = fixscope(old_dbusobj, new_dbusfunc)

782

783

elif (getattr(old_dbusobj, "_dbus_is_method", False)

784

and old_dbusobj._dbus_interface.startswith("se.bsnet.fukt.Mandos")):

785

new_dbusfunc = (dbus.service.method

786

(new_interface,

787

old_dbusobj._dbus_in_signature,

788

old_dbusobj._dbus_out_signature)

789

(types.FunctionType

790

(old_dbusobj.func_code,

791

old_dbusobj.func_globals,

792

old_dbusobj.func_name,

793

old_dbusobj.func_defaults,

794

old_dbusobj.func_closure)))

795

796

attr[attrname] = new_dbusfunc

797

elif (getattr(old_dbusobj, "_dbus_is_property", False)

798

and old_dbusobj._dbus_interface.startswith("se.bsnet.fukt.Mandos")):

799

new_dbusfunc = (dbus_service_property

800

(new_interface,

801

old_dbusobj._dbus_signature,

802

old_dbusobj._dbus_access,

803

old_dbusobj._dbus_get_args_options["byte_arrays"])

804

(types.FunctionType

805

(old_dbusobj.func_code,

806

old_dbusobj.func_globals,

807

old_dbusobj.func_name,

808

old_dbusobj.func_defaults,

809

old_dbusobj.func_closure)))

810

811

attr[attrname] = new_dbusfunc

812

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

813

1224

814

class ClientDBus(Client, DBusObjectWithProperties):

1225

815

"""A Client class using D-Bus

1226

816

1232

822

runtime_expansions = (Client.runtime_expansions

1233

823

+ ("dbus_object_path",))

1234

824

1235

_interface = "se.recompile.Mandos.Client"

1236

1237

825

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

1238

826

1239

827

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

828

self._approvals_pending = 0

1240

829

self.bus = bus

1241

830

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

1242

831

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

1243

832

# the D-Bus

1244

client_object_name = str(self.name).translate(

833

client_object_name = unicode(self.name).translate(

1245

834

{ord("."): ord("_"),

1246

835

ord("-"): ord("_")})

1247

836

self.dbus_object_path = (dbus.ObjectPath

1248

837

("/clients/" + client_object_name))

1249

838

DBusObjectWithProperties.__init__(self, self.bus,

1250

839

self.dbus_object_path)

1251

840

1252

841

def notifychangeproperty(transform_func,

1253

842

dbus_name, type_func=lambda x: x,

1254

variant_level=1, invalidate_only=False,

1255

_interface=_interface):

1256

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

1257

its changes to DBus.

1258

1259

transform_fun: Function that takes a value and a variant_level

1260

and transforms it to a D-Bus type.

1261

dbus_name: D-Bus name of the variable

843

variant_level=1):

844

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

845

changes to DBus.

846

transform_fun: Function that takes a value and transform it to

847

DBus type.

848

dbus_name: DBus name of the variable

1262

849

type_func: Function that transform the value before sending it

1263

to the D-Bus. Default: no transform

1264

variant_level: D-Bus variant level. Default: 1

850

to DBus

851

variant_level: DBus variant level. default: 1

1265

852

"""

1266

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

853

real_value = [None,]

1267

854

def setter(self, value):

855

old_value = real_value[0]

856

real_value[0] = value

1268

857

if hasattr(self, "dbus_object_path"):

1269

if (not hasattr(self, attrname) or

1270

type_func(getattr(self, attrname, None))

1271

!= type_func(value)):

1272

if invalidate_only:

1273

self.PropertiesChanged(_interface,

1274

dbus.Dictionary(),

1275

dbus.Array

1276

((dbus_name,)))

1277

else:

1278

dbus_value = transform_func(type_func(value),

1279

variant_level

1280

=variant_level)

1281

self.PropertyChanged(dbus.String(dbus_name),

1282

dbus_value)

1283

self.PropertiesChanged(_interface,

1284

dbus.Dictionary({

1285

dbus.String(dbus_name):

1286

dbus_value }), dbus.Array())

1287

setattr(self, attrname, value)

858

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

859

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

860

variant_level)

861

self.PropertyChanged(dbus.String(dbus_name),

862

dbus_value)

1288

863

1289

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

864

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

865

1290

866

1291

867

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1292

868

approvals_pending = notifychangeproperty(dbus.Boolean,

1296

872

last_enabled = notifychangeproperty(datetime_to_dbus,

1297

873

"LastEnabled")

1298

874

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

1299

type_func = lambda checker:

1300

checker is not None)

875

type_func = lambda checker: checker is not None)

1301

876

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1302

877

"LastCheckedOK")

1303

last_checker_status = notifychangeproperty(dbus.Int16,

1304

"LastCheckerStatus")

1305

last_approval_request = notifychangeproperty(

1306

datetime_to_dbus, "LastApprovalRequest")

878

last_approval_request = notifychangeproperty(datetime_to_dbus,

879

"LastApprovalRequest")

1307

880

approved_by_default = notifychangeproperty(dbus.Boolean,

1308

881

"ApprovedByDefault")

1309

approval_delay = notifychangeproperty(dbus.UInt64,

1310

"ApprovalDelay",

1311

type_func =

1312

lambda td: td.total_seconds()

1313

* 1000)

1314

approval_duration = notifychangeproperty(

1315

dbus.UInt64, "ApprovalDuration",

1316

type_func = lambda td: td.total_seconds() * 1000)

882

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

883

type_func = _timedelta_to_milliseconds)

884

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

885

type_func = _timedelta_to_milliseconds)

1317

886

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

1318

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

1319

type_func = lambda td:

1320

td.total_seconds() * 1000)

1321

extended_timeout = notifychangeproperty(

1322

dbus.UInt64, "ExtendedTimeout",

1323

type_func = lambda td: td.total_seconds() * 1000)

1324

interval = notifychangeproperty(dbus.UInt64,

1325

"Interval",

1326

type_func =

1327

lambda td: td.total_seconds()

1328

* 1000)

887

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

888

type_func = _timedelta_to_milliseconds)

889

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

890

type_func = _timedelta_to_milliseconds)

891

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

892

type_func = _timedelta_to_milliseconds)

1329

893

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

1330

secret = notifychangeproperty(dbus.ByteArray, "Secret",

1331

invalidate_only=True)

1332

894

1333

895

del notifychangeproperty

1334

896

1361

923

*args, **kwargs)

1362

924

1363

925

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

1364

old_checker_pid = getattr(self.checker, "pid", None)

926

old_checker = self.checker

927

if self.checker is not None:

928

old_checker_pid = self.checker.pid

929

else:

930

old_checker_pid = None

1365

931

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

1366

932

# Only if new checker process was started

1367

933

if (self.checker is not None

1371

937

return r

1372

938

1373

939

def _reset_approved(self):

1374

self.approved = None

940

self._approved = None

1375

941

return False

1376

942

1377

943

def approve(self, value=True):

1378

self.approved = value

1379

gobject.timeout_add(int(self.approval_duration.total_seconds()

1380

* 1000), self._reset_approved)

1381

944

self.send_changedstate()

945

self._approved = value

946

gobject.timeout_add(_timedelta_to_milliseconds

947

(self.approval_duration),

948

self._reset_approved)

949

1382

950

1383

951

## D-Bus methods, signals & properties

1384

1385

## Interfaces

1386

952

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

953

1387

954

## Signals

1388

955

1389

956

# CheckerCompleted - signal

1399

966

pass

1400

967

1401

968

# PropertyChanged - signal

1402

@dbus_annotations({"org.freedesktop.DBus.Deprecated": "true"})

1403

969

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

1404

970

def PropertyChanged(self, property, value):

1405

971

"D-Bus signal"

1481

1047

access="readwrite")

1482

1048

def ApprovalDelay_dbus_property(self, value=None):

1483

1049

if value is None: # get

1484

return dbus.UInt64(self.approval_delay.total_seconds()

1485

* 1000)

1050

return dbus.UInt64(self.approval_delay_milliseconds())

1486

1051

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

1487

1052

1488

1053

# ApprovalDuration - property

1490

1055

access="readwrite")

1491

1056

def ApprovalDuration_dbus_property(self, value=None):

1492

1057

if value is None: # get

1493

return dbus.UInt64(self.approval_duration.total_seconds()

1494

* 1000)

1058

return dbus.UInt64(_timedelta_to_milliseconds(

1059

self.approval_duration))

1495

1060

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

1496

1061

1497

1062

# Name - property

1510

1075

def Host_dbus_property(self, value=None):

1511

1076

if value is None: # get

1512

1077

return dbus.String(self.host)

1513

self.host = str(value)

1078

self.host = value

1514

1079

1515

1080

# Created - property

1516

1081

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

1517

1082

def Created_dbus_property(self):

1518

return datetime_to_dbus(self.created)

1083

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

1519

1084

1520

1085

# LastEnabled - property

1521

1086

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

1542

1107

return

1543

1108

return datetime_to_dbus(self.last_checked_ok)

1544

1109

1545

# LastCheckerStatus - property

1546

@dbus_service_property(_interface, signature="n",

1547

access="read")

1548

def LastCheckerStatus_dbus_property(self):

1549

return dbus.Int16(self.last_checker_status)

1550

1551

1110

# Expires - property

1552

1111

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

1553

1112

def Expires_dbus_property(self):

1563

1122

access="readwrite")

1564

1123

def Timeout_dbus_property(self, value=None):

1565

1124

if value is None: # get

1566

return dbus.UInt64(self.timeout.total_seconds() * 1000)

1567

old_timeout = self.timeout

1125

return dbus.UInt64(self.timeout_milliseconds())

1568

1126

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

1569

# Reschedule disabling

1570

if self.enabled:

1571

now = datetime.datetime.utcnow()

1572

self.expires += self.timeout - old_timeout

1573

if self.expires <= now:

1574

# The timeout has passed

1575

self.disable()

1576

else:

1577

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

1578

is None):

1579

return

1580

gobject.source_remove(self.disable_initiator_tag)

1581

self.disable_initiator_tag = (

1582

gobject.timeout_add(

1583

int((self.expires - now).total_seconds()

1584

* 1000), self.disable))

1127

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

1128

return

1129

# Reschedule timeout

1130

gobject.source_remove(self.disable_initiator_tag)

1131

self.disable_initiator_tag = None

1132

self.expires = None

1133

time_to_die = (self.

1134

_timedelta_to_milliseconds((self

1135

.last_checked_ok

1136

+ self.timeout)

1137

- datetime.datetime

1138

.utcnow()))

1139

if time_to_die <= 0:

1140

# The timeout has passed

1141

self.disable()

1142

else:

1143

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

1144

+ datetime.timedelta(milliseconds = time_to_die))

1145

self.disable_initiator_tag = (gobject.timeout_add

1146

(time_to_die, self.disable))

1585

1147

1586

1148

# ExtendedTimeout - property

1587

1149

@dbus_service_property(_interface, signature="t",

1588

1150

access="readwrite")

1589

1151

def ExtendedTimeout_dbus_property(self, value=None):

1590

1152

if value is None: # get

1591

return dbus.UInt64(self.extended_timeout.total_seconds()

1592

* 1000)

1153

return dbus.UInt64(self.extended_timeout_milliseconds())

1593

1154

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

1594

1155

1595

1156

# Interval - property

1597

1158

access="readwrite")

1598

1159

def Interval_dbus_property(self, value=None):

1599

1160

if value is None: # get

1600

return dbus.UInt64(self.interval.total_seconds() * 1000)

1161

return dbus.UInt64(self.interval_milliseconds())

1601

1162

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

1602

1163

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

1603

1164

return

1604

if self.enabled:

1605

# Reschedule checker run

1606

gobject.source_remove(self.checker_initiator_tag)

1607

self.checker_initiator_tag = (gobject.timeout_add

1608

(value, self.start_checker))

1609

self.start_checker() # Start one now, too

1165

# Reschedule checker run

1166

gobject.source_remove(self.checker_initiator_tag)

1167

self.checker_initiator_tag = (gobject.timeout_add

1168

(value, self.start_checker))

1169

self.start_checker() # Start one now, too

1610

1170

1611

1171

# Checker - property

1612

1172

@dbus_service_property(_interface, signature="s",

1614

1174

def Checker_dbus_property(self, value=None):

1615

1175

if value is None: # get

1616

1176

return dbus.String(self.checker_command)

1617

self.checker_command = str(value)

1177

self.checker_command = value

1618

1178

1619

1179

# CheckerRunning - property

1620

1180

@dbus_service_property(_interface, signature="b",

1636

1196

@dbus_service_property(_interface, signature="ay",

1637

1197

access="write", byte_arrays=True)

1638

1198

def Secret_dbus_property(self, value):

1639

self.secret = bytes(value)

1199

self.secret = str(value)

1640

1200

1641

1201

del _interface

1642

1202

1649

1209

raise KeyError()

1650

1210

1651

1211

def __getattribute__(self, name):

1652

if name == '_pipe':

1212

if(name == '_pipe'):

1653

1213

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

1654

1214

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

1655

1215

data = self._pipe.recv()

1662

1222

return func

1663

1223

1664

1224

def __setattr__(self, name, value):

1665

if name == '_pipe':

1225

if(name == '_pipe'):

1666

1226

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

1667

1227

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

1668

1228

1229

class ClientDBusTransitional(ClientDBus):

1230

__metaclass__ = transitional_dbus_metaclass

1669

1231

1670

1232

class ClientHandler(socketserver.BaseRequestHandler, object):

1671

1233

"""A class to handle client connections.

1676

1238

def handle(self):

1677

1239

with contextlib.closing(self.server.child_pipe) as child_pipe:

1678

1240

logger.info("TCP connection from: %s",

1679

str(self.client_address))

1241

unicode(self.client_address))

1680

1242

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

1681

1243

self.server.child_pipe.fileno())

1682

1244

1708

1270

logger.debug("Protocol version: %r", line)

1709

1271

try:

1710

1272

if int(line.strip().split()[0]) > 1:

1711

raise RuntimeError(line)

1273

raise RuntimeError

1712

1274

except (ValueError, IndexError, RuntimeError) as error:

1713

1275

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

1714

1276

return

1751

1313

client.name)

1752

1314

if self.server.use_dbus:

1753

1315

# Emit D-Bus signal

1754

client.Rejected("Disabled")

1316

client.Rejected("Disabled")

1755

1317

return

1756

1318

1757

if client.approved or not client.approval_delay:

1319

if client._approved or not client.approval_delay:

1758

1320

#We are approved or approval is disabled

1759

1321

break

1760

elif client.approved is None:

1322

elif client._approved is None:

1761

1323

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

1762

1324

client.name)

1763

1325

if self.server.use_dbus:

1764

1326

# Emit D-Bus signal

1765

1327

client.NeedApproval(

1766

client.approval_delay.total_seconds()

1767

* 1000, client.approved_by_default)

1328

client.approval_delay_milliseconds(),

1329

client.approved_by_default)

1768

1330

else:

1769

1331

logger.warning("Client %s was not approved",

1770

1332

client.name)

1774

1336

return

1775

1337

1776

1338

#wait until timeout or approved

1339

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

1777

1340

time = datetime.datetime.now()

1778

1341

client.changedstate.acquire()

1779

client.changedstate.wait(delay.total_seconds())

1342

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

1780

1343

client.changedstate.release()

1781

1344

time2 = datetime.datetime.now()

1782

1345

if (time2 - time) >= delay:

1798

1361

try:

1799

1362

sent = session.send(client.secret[sent_size:])

1800

1363

except gnutls.errors.GNUTLSError as error:

1801

logger.warning("gnutls send failed",

1802

exc_info=error)

1364

logger.warning("gnutls send failed")

1803

1365

return

1804

1366

logger.debug("Sent: %d, remaining: %d",

1805

1367

sent, len(client.secret)

1807

1369

sent_size += sent

1808

1370

1809

1371

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

1810

# bump the timeout using extended_timeout

1811

client.bump_timeout(client.extended_timeout)

1372

# bump the timeout as if seen

1373

client.checked_ok(client.extended_timeout)

1812

1374

if self.server.use_dbus:

1813

1375

# Emit D-Bus signal

1814

1376

client.GotSecret()

1819

1381

try:

1820

1382

session.bye()

1821

1383

except gnutls.errors.GNUTLSError as error:

1822

logger.warning("GnuTLS bye failed",

1823

exc_info=error)

1384

logger.warning("GnuTLS bye failed")

1824

1385

1825

1386

@staticmethod

1826

1387

def peer_certificate(session):

1882

1443

# Convert the buffer to a Python bytestring

1883

1444

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

1884

1445

# Convert the bytestring to hexadecimal notation

1885

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

1446

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

1886

1447

return hex_fpr

1887

1448

1888

1449

1891

1452

def sub_process_main(self, request, address):

1892

1453

try:

1893

1454

self.finish_request(request, address)

1894

except Exception:

1455

except:

1895

1456

self.handle_error(request, address)

1896

1457

self.close_request(request)

1897

1458

1898

1459

def process_request(self, request, address):

1899

1460

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

1900

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

1901

args = (request, address))

1902

proc.start()

1903

return proc

1461

multiprocessing.Process(target = self.sub_process_main,

1462

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

1904

1463

1905

1464

1906

1465

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1912

1471

"""

1913

1472

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1914

1473

1915

proc = MultiprocessingMixIn.process_request(self, request,

1916

client_address)

1474

super(MultiprocessingMixInWithPipe,

1475

self).process_request(request, client_address)

1917

1476

self.child_pipe.close()

1918

self.add_pipe(parent_pipe, proc)

1477

self.add_pipe(parent_pipe)

1919

1478

1920

def add_pipe(self, parent_pipe, proc):

1479

def add_pipe(self, parent_pipe):

1921

1480

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

1922

raise NotImplementedError()

1481

raise NotImplementedError

1923

1482

1924

1483

1925

1484

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1932

1491

use_ipv6: Boolean; to use IPv6 or not

1933

1492

"""

1934

1493

def __init__(self, server_address, RequestHandlerClass,

1935

interface=None, use_ipv6=True, socketfd=None):

1936

"""If socketfd is set, use that file descriptor instead of

1937

creating a new one with socket.socket().

1938

"""

1494

interface=None, use_ipv6=True):

1939

1495

self.interface = interface

1940

1496

if use_ipv6:

1941

1497

self.address_family = socket.AF_INET6

1942

if socketfd is not None:

1943

# Save the file descriptor

1944

self.socketfd = socketfd

1945

# Save the original socket.socket() function

1946

self.socket_socket = socket.socket

1947

# To implement --socket, we monkey patch socket.socket.

1948

#

1949

# (When socketserver.TCPServer is a new-style class, we

1950

# could make self.socket into a property instead of monkey

1951

# patching socket.socket.)

1952

#

1953

# Create a one-time-only replacement for socket.socket()

1954

@functools.wraps(socket.socket)

1955

def socket_wrapper(*args, **kwargs):

1956

# Restore original function so subsequent calls are

1957

# not affected.

1958

socket.socket = self.socket_socket

1959

del self.socket_socket

1960

# This time only, return a new socket object from the

1961

# saved file descriptor.

1962

return socket.fromfd(self.socketfd, *args, **kwargs)

1963

# Replace socket.socket() function with wrapper

1964

socket.socket = socket_wrapper

1965

# The socketserver.TCPServer.__init__ will call

1966

# socket.socket(), which might be our replacement,

1967

# socket_wrapper(), if socketfd was set.

1968

1498

socketserver.TCPServer.__init__(self, server_address,

1969

1499

RequestHandlerClass)

1970

1971

1500

def server_bind(self):

1972

1501

"""This overrides the normal server_bind() function

1973

1502

to bind to an interface if one was specified, and also NOT to

1981

1510

try:

1982

1511

self.socket.setsockopt(socket.SOL_SOCKET,

1983

1512

SO_BINDTODEVICE,

1984

(self.interface + "\0")

1985

.encode("utf-8"))

1513

str(self.interface

1514

+ '\0'))

1986

1515

except socket.error as error:

1987

if error.errno == errno.EPERM:

1988

logger.error("No permission to bind to"

1989

" interface %s", self.interface)

1990

elif error.errno == errno.ENOPROTOOPT:

1516

if error[0] == errno.EPERM:

1517

logger.error("No permission to"

1518

" bind to interface %s",

1519

self.interface)

1520

elif error[0] == errno.ENOPROTOOPT:

1991

1521

logger.error("SO_BINDTODEVICE not available;"

1992

1522

" cannot bind to interface %s",

1993

1523

self.interface)

1994

elif error.errno == errno.ENODEV:

1995

logger.error("Interface %s does not exist,"

1996

" cannot bind", self.interface)

1997

1524

else:

1998

1525

raise

1999

1526

# Only bind(2) the socket if we really need to.

2002

1529

if self.address_family == socket.AF_INET6:

2003

1530

any_address = "::" # in6addr_any

2004

1531

else:

2005

any_address = "0.0.0.0" # INADDR_ANY

1532

any_address = socket.INADDR_ANY

2006

1533

self.server_address = (any_address,

2007

1534

self.server_address[1])

2008

1535

elif not self.server_address[1]:

2029

1556

"""

2030

1557

def __init__(self, server_address, RequestHandlerClass,

2031

1558

interface=None, use_ipv6=True, clients=None,

2032

gnutls_priority=None, use_dbus=True, socketfd=None):

1559

gnutls_priority=None, use_dbus=True):

2033

1560

self.enabled = False

2034

1561

self.clients = clients

2035

1562

if self.clients is None:

2036

self.clients = {}

1563

self.clients = set()

2037

1564

self.use_dbus = use_dbus

2038

1565

self.gnutls_priority = gnutls_priority

2039

1566

IPv6_TCPServer.__init__(self, server_address,

2040

1567

RequestHandlerClass,

2041

1568

interface = interface,

2042

use_ipv6 = use_ipv6,

2043

socketfd = socketfd)

1569

use_ipv6 = use_ipv6)

2044

1570

def server_activate(self):

2045

1571

if self.enabled:

2046

1572

return socketserver.TCPServer.server_activate(self)

2047

2048

1573

def enable(self):

2049

1574

self.enabled = True

2050

2051

def add_pipe(self, parent_pipe, proc):

1575

def add_pipe(self, parent_pipe):

2052

1576

# Call "handle_ipc" for both data and EOF events

2053

1577

gobject.io_add_watch(parent_pipe.fileno(),

2054

1578

gobject.IO_IN | gobject.IO_HUP,

2055

1579

functools.partial(self.handle_ipc,

2056

parent_pipe =

2057

parent_pipe,

2058

proc = proc))

2059

1580

parent_pipe = parent_pipe))

1581

2060

1582

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

2061

proc = None, client_object=None):

2062

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

2063

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

2064

# Wait for other process to exit

2065

proc.join()

1583

client_object=None):

1584

condition_names = {

1585

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

1586

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

1587

# blocking).

1588

gobject.IO_PRI: "PRI", # There is urgent data to read.

1589

gobject.IO_ERR: "ERR", # Error condition.

1590

gobject.IO_HUP: "HUP" # Hung up (the connection has been

1591

# broken, usually for pipes and

1592

# sockets).

1593

}

1594

conditions_string = ' | '.join(name

1595

for cond, name in

1596

condition_names.iteritems()

1597

if cond & condition)

1598

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

1599

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

2066

1600

return False

2067

1601

2068

1602

# Read a request from the child

2073

1607

fpr = request[1]

2074

1608

address = request[2]

2075

1609

2076

for c in self.clients.itervalues():

1610

for c in self.clients:

2077

1611

if c.fingerprint == fpr:

2078

1612

client = c

2079

1613

break

2082

1616

"dress: %s", fpr, address)

2083

1617

if self.use_dbus:

2084

1618

# Emit D-Bus signal

2085

mandos_dbus_service.ClientNotFound(fpr,

2086

address[0])

1619

mandos_dbus_service.ClientNotFound(fpr, address[0])

2087

1620

parent_pipe.send(False)

2088

1621

return False

2089

1622

2090

1623

gobject.io_add_watch(parent_pipe.fileno(),

2091

1624

gobject.IO_IN | gobject.IO_HUP,

2092

1625

functools.partial(self.handle_ipc,

2093

parent_pipe =

2094

parent_pipe,

2095

proc = proc,

2096

client_object =

2097

client))

1626

parent_pipe = parent_pipe,

1627

client_object = client))

2098

1628

parent_pipe.send(True)

2099

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

2100

# same fileno

1629

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

2101

1630

return False

2102

1631

if command == 'funcall':

2103

1632

funcname = request[1]

2104

1633

args = request[2]

2105

1634

kwargs = request[3]

2106

1635

2107

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

2108

funcname)(*args,

2109

**kwargs)))

1636

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

2110

1637

2111

1638

if command == 'getattr':

2112

1639

attrname = request[1]

2113

1640

if callable(client_object.__getattribute__(attrname)):

2114

1641

parent_pipe.send(('function',))

2115

1642

else:

2116

parent_pipe.send(('data', client_object

2117

.__getattribute__(attrname)))

1643

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

2118

1644

2119

1645

if command == 'setattr':

2120

1646

attrname = request[1]

2124

1650

return True

2125

1651

2126

1652

2127

def rfc3339_duration_to_delta(duration):

2128

"""Parse an RFC 3339 "duration" and return a datetime.timedelta

2129

2130

>>> rfc3339_duration_to_delta("P7D")

2131

datetime.timedelta(7)

2132

>>> rfc3339_duration_to_delta("PT60S")

2133

datetime.timedelta(0, 60)

2134

>>> rfc3339_duration_to_delta("PT60M")

2135

datetime.timedelta(0, 3600)

2136

>>> rfc3339_duration_to_delta("PT24H")

2137

datetime.timedelta(1)

2138

>>> rfc3339_duration_to_delta("P1W")

2139

datetime.timedelta(7)

2140

>>> rfc3339_duration_to_delta("PT5M30S")

2141

datetime.timedelta(0, 330)

2142

>>> rfc3339_duration_to_delta("P1DT3M20S")

2143

datetime.timedelta(1, 200)

2144

"""

2145

2146

# Parsing an RFC 3339 duration with regular expressions is not

2147

# possible - there would have to be multiple places for the same

2148

# values, like seconds. The current code, while more esoteric, is

2149

# cleaner without depending on a parsing library. If Python had a

2150

# built-in library for parsing we would use it, but we'd like to

2151

# avoid excessive use of external libraries.

2152

2153

# New type for defining tokens, syntax, and semantics all-in-one

2154

Token = collections.namedtuple("Token",

2155

("regexp", # To match token; if

2156

# "value" is not None,

2157

# must have a "group"

2158

# containing digits

2159

"value", # datetime.timedelta or

2160

# None

2161

"followers")) # Tokens valid after

2162

# this token

2163

# RFC 3339 "duration" tokens, syntax, and semantics; taken from

2164

# the "duration" ABNF definition in RFC 3339, Appendix A.

2165

token_end = Token(re.compile(r"$"), None, frozenset())

2166

token_second = Token(re.compile(r"(\d+)S"),

2167

datetime.timedelta(seconds=1),

2168

frozenset((token_end,)))

2169

token_minute = Token(re.compile(r"(\d+)M"),

2170

datetime.timedelta(minutes=1),

2171

frozenset((token_second, token_end)))

2172

token_hour = Token(re.compile(r"(\d+)H"),

2173

datetime.timedelta(hours=1),

2174

frozenset((token_minute, token_end)))

2175

token_time = Token(re.compile(r"T"),

2176

None,

2177

frozenset((token_hour, token_minute,

2178

token_second)))

2179

token_day = Token(re.compile(r"(\d+)D"),

2180

datetime.timedelta(days=1),

2181

frozenset((token_time, token_end)))

2182

token_month = Token(re.compile(r"(\d+)M"),

2183

datetime.timedelta(weeks=4),

2184

frozenset((token_day, token_end)))

2185

token_year = Token(re.compile(r"(\d+)Y"),

2186

datetime.timedelta(weeks=52),

2187

frozenset((token_month, token_end)))

2188

token_week = Token(re.compile(r"(\d+)W"),

2189

datetime.timedelta(weeks=1),

2190

frozenset((token_end,)))

2191

token_duration = Token(re.compile(r"P"), None,

2192

frozenset((token_year, token_month,

2193

token_day, token_time,

2194

token_week)))

2195

# Define starting values

2196

value = datetime.timedelta() # Value so far

2197

found_token = None

2198

followers = frozenset((token_duration,)) # Following valid tokens

2199

s = duration # String left to parse

2200

# Loop until end token is found

2201

while found_token is not token_end:

2202

# Search for any currently valid tokens

2203

for token in followers:

2204

match = token.regexp.match(s)

2205

if match is not None:

2206

# Token found

2207

if token.value is not None:

2208

# Value found, parse digits

2209

factor = int(match.group(1), 10)

2210

# Add to value so far

2211

value += factor * token.value

2212

# Strip token from string

2213

s = token.regexp.sub("", s, 1)

2214

# Go to found token

2215

found_token = token

2216

# Set valid next tokens

2217

followers = found_token.followers

2218

break

2219

else:

2220

# No currently valid tokens were found

2221

raise ValueError("Invalid RFC 3339 duration")

2222

# End token found

2223

return value

2224

2225

2226

1653

def string_to_delta(interval):

2227

1654

"""Parse a string and return a datetime.timedelta

2228

1655

2239

1666

>>> string_to_delta('5m 30s')

2240

1667

datetime.timedelta(0, 330)

2241

1668

"""

2242

2243

try:

2244

return rfc3339_duration_to_delta(interval)

2245

except ValueError:

2246

pass

2247

2248

1669

timevalue = datetime.timedelta(0)

2249

1670

for s in interval.split():

2250

1671

try:

2251

suffix = s[-1]

1672

suffix = unicode(s[-1])

2252

1673

value = int(s[:-1])

2253

1674

if suffix == "d":

2254

1675

delta = datetime.timedelta(value)

2261

1682

elif suffix == "w":

2262

1683

delta = datetime.timedelta(0, 0, 0, 0, 0, 0, value)

2263

1684

else:

2264

raise ValueError("Unknown suffix {!r}"

2265

.format(suffix))

2266

except IndexError as e:

1685

raise ValueError("Unknown suffix %r" % suffix)

1686

except (ValueError, IndexError) as e:

2267

1687

raise ValueError(*(e.args))

2268

1688

timevalue += delta

2269

1689

return timevalue

2270

1690

2271

1691

1692

def if_nametoindex(interface):

1693

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

1694

1695

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

1696

global if_nametoindex

1697

try:

1698

if_nametoindex = (ctypes.cdll.LoadLibrary

1699

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

1700

.if_nametoindex)

1701

except (OSError, AttributeError):

1702

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

1703

def if_nametoindex(interface):

1704

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

1705

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

1706

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

1707

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1708

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

1709

interface))

1710

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

1711

ifreq[16:20])[0]

1712

return interface_index

1713

return if_nametoindex(interface)

1714

1715

2272

1716

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

2273

1717

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

2274

1718

2282

1726

sys.exit()

2283

1727

if not noclose:

2284

1728

# Close all standard open file descriptors

2285

null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)

1729

null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)

2286

1730

if not stat.S_ISCHR(os.fstat(null).st_mode):

2287

raise OSError(errno.ENODEV, "{} not a character device"

2288

.format(os.devnull))

1731

raise OSError(errno.ENODEV,

1732

"%s not a character device"

1733

% os.path.devnull)

2289

1734

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

2290

1735

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

2291

1736

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

2300

1745

2301

1746

parser = argparse.ArgumentParser()

2302

1747

parser.add_argument("-v", "--version", action="version",

2303

version = "%(prog)s {}".format(version),

1748

version = "%%(prog)s %s" % version,

2304

1749

help="show version number and exit")

2305

1750

parser.add_argument("-i", "--interface", metavar="IF",

2306

1751

help="Bind to interface IF")

2312

1757

help="Run self-test")

2313

1758

parser.add_argument("--debug", action="store_true",

2314

1759

help="Debug mode; run in foreground and log"

2315

" to terminal", default=None)

1760

" to terminal")

2316

1761

parser.add_argument("--debuglevel", metavar="LEVEL",

2317

1762

help="Debug level for stdout output")

2318

1763

parser.add_argument("--priority", help="GnuTLS"

2325

1770

" files")

2326

1771

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

2327

1772

dest="use_dbus", help="Do not provide D-Bus"

2328

" system bus interface", default=None)

1773

" system bus interface")

2329

1774

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

2330

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

2331

default=None)

2332

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

2333

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

2334

" state", default=None)

2335

parser.add_argument("--socket", type=int,

2336

help="Specify a file descriptor to a network"

2337

" socket to use instead of creating one")

2338

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

2339

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

2340

parser.add_argument("--foreground", action="store_true",

2341

help="Run in foreground", default=None)

2342

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

2343

dest="zeroconf", help="Do not use Zeroconf",

2344

default=None)

2345

1775

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

2346

1776

options = parser.parse_args()

2347

1777

2348

1778

if options.check:

2349

1779

import doctest

2350

fail_count, test_count = doctest.testmod()

2351

sys.exit(os.EX_OK if fail_count == 0 else 1)

1780

doctest.testmod()

1781

sys.exit()

2352

1782

2353

1783

# Default values for config file for server-global settings

2354

1784

server_defaults = { "interface": "",

2356

1786

"port": "",

2357

1787

"debug": "False",

2358

1788

"priority":

2359

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",

1789

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP",

2360

1790

"servicename": "Mandos",

2361

1791

"use_dbus": "True",

2362

1792

"use_ipv6": "True",

2363

1793

"debuglevel": "",

2364

"restore": "True",

2365

"socket": "",

2366

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

2367

"foreground": "False",

2368

"zeroconf": "True",

2369

1794

}

2370

1795

2371

1796

# Parse config file for server-global settings

2376

1801

# Convert the SafeConfigParser object to a dict

2377

1802

server_settings = server_config.defaults()

2378

1803

# Use the appropriate methods on the non-string config options

2379

for option in ("debug", "use_dbus", "use_ipv6", "foreground"):

1804

for option in ("debug", "use_dbus", "use_ipv6"):

2380

1805

server_settings[option] = server_config.getboolean("DEFAULT",

2381

1806

option)

2382

1807

if server_settings["port"]:

2383

1808

server_settings["port"] = server_config.getint("DEFAULT",

2384

1809

"port")

2385

if server_settings["socket"]:

2386

server_settings["socket"] = server_config.getint("DEFAULT",

2387

"socket")

2388

# Later, stdin will, and stdout and stderr might, be dup'ed

2389

# over with an opened os.devnull. But we don't want this to

2390

# happen with a supplied network socket.

2391

if 0 <= server_settings["socket"] <= 2:

2392

server_settings["socket"] = os.dup(server_settings

2393

["socket"])

2394

1810

del server_config

2395

1811

2396

1812

# Override the settings from the config file with command line

2397

1813

# options, if set.

2398

1814

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

2399

1815

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

2400

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

2401

"statedir", "socket", "foreground", "zeroconf"):

1816

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

2402

1817

value = getattr(options, option)

2403

1818

if value is not None:

2404

1819

server_settings[option] = value

2405

1820

del options

2406

1821

# Force all strings to be unicode

2407

1822

for option in server_settings.keys():

2408

if isinstance(server_settings[option], bytes):

2409

server_settings[option] = (server_settings[option]

2410

.decode("utf-8"))

2411

# Force all boolean options to be boolean

2412

for option in ("debug", "use_dbus", "use_ipv6", "restore",

2413

"foreground", "zeroconf"):

2414

server_settings[option] = bool(server_settings[option])

2415

# Debug implies foreground

2416

if server_settings["debug"]:

2417

server_settings["foreground"] = True

1823

if type(server_settings[option]) is str:

1824

server_settings[option] = unicode(server_settings[option])

2418

1825

# Now we have our good server settings in "server_settings"

2419

1826

2420

1827

##################################################################

2421

1828

2422

if (not server_settings["zeroconf"] and

2423

not (server_settings["port"]

2424

or server_settings["socket"] != "")):

2425

parser.error("Needs port or socket to work without"

2426

" Zeroconf")

2427

2428

1829

# For convenience

2429

1830

debug = server_settings["debug"]

2430

1831

debuglevel = server_settings["debuglevel"]

2431

1832

use_dbus = server_settings["use_dbus"]

2432

1833

use_ipv6 = server_settings["use_ipv6"]

2433

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

2434

stored_state_file)

2435

foreground = server_settings["foreground"]

2436

zeroconf = server_settings["zeroconf"]

2437

2438

if debug:

2439

initlogger(debug, logging.DEBUG)

2440

else:

2441

if not debuglevel:

2442

initlogger(debug)

2443

else:

2444

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

2445

initlogger(debug, level)

2446

1834

2447

1835

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

2448

1836

syslogger.setFormatter(logging.Formatter

2449

('Mandos ({}) [%(process)d]:'

2450

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

2451

.format(server_settings

2452

["servicename"])))

1837

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

1838

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

1839

% server_settings["servicename"]))

2453

1840

2454

1841

# Parse config file with clients

2455

client_config = configparser.SafeConfigParser(Client

2456

.client_defaults)

1842

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

1843

"extended_timeout": "15m",

1844

"interval": "2m",

1845

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

1846

"host": "",

1847

"approval_delay": "0s",

1848

"approval_duration": "1s",

1849

}

1850

client_config = configparser.SafeConfigParser(client_defaults)

2457

1851

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

2458

1852

"clients.conf"))

2459

1853

2460

1854

global mandos_dbus_service

2461

1855

mandos_dbus_service = None

2462

1856

2463

socketfd = None

2464

if server_settings["socket"] != "":

2465

socketfd = server_settings["socket"]

2466

1857

tcp_server = MandosServer((server_settings["address"],

2467

1858

server_settings["port"]),

2468

1859

ClientHandler,

2471

1862

use_ipv6=use_ipv6,

2472

1863

gnutls_priority=

2473

1864

server_settings["priority"],

2474

use_dbus=use_dbus,

2475

socketfd=socketfd)

2476

if not foreground:

2477

pidfilename = "/run/mandos.pid"

2478

if not os.path.isdir("/run/."):

2479

pidfilename = "/var/run/mandos.pid"

2480

pidfile = None

1865

use_dbus=use_dbus)

1866

if not debug:

1867

pidfilename = "/var/run/mandos.pid"

2481

1868

try:

2482

1869

pidfile = open(pidfilename, "w")

2483

except IOError as e:

2484

logger.error("Could not open file %r", pidfilename,

2485

exc_info=e)

1870

except IOError:

1871

logger.error("Could not open file %r", pidfilename)

2486

1872

2487

for name in ("_mandos", "mandos", "nobody"):

1873

try:

1874

uid = pwd.getpwnam("_mandos").pw_uid

1875

gid = pwd.getpwnam("_mandos").pw_gid

1876

except KeyError:

2488

1877

try:

2489

uid = pwd.getpwnam(name).pw_uid

2490

gid = pwd.getpwnam(name).pw_gid

2491

break

1878

uid = pwd.getpwnam("mandos").pw_uid

1879

gid = pwd.getpwnam("mandos").pw_gid

2492

1880

except KeyError:

2493

continue

2494

else:

2495

uid = 65534

2496

gid = 65534

1881

try:

1882

uid = pwd.getpwnam("nobody").pw_uid

1883

gid = pwd.getpwnam("nobody").pw_gid

1884

except KeyError:

1885

uid = 65534

1886

gid = 65534

2497

1887

try:

2498

1888

os.setgid(gid)

2499

1889

os.setuid(uid)

2500

1890

except OSError as error:

2501

if error.errno != errno.EPERM:

2502

raise

1891

if error[0] != errno.EPERM:

1892

raise error

1893

1894

if not debug and not debuglevel:

1895

syslogger.setLevel(logging.WARNING)

1896

console.setLevel(logging.WARNING)

1897

if debuglevel:

1898

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

1899

syslogger.setLevel(level)

1900

console.setLevel(level)

2503

1901

2504

1902

if debug:

2505

1903

# Enable all possible GnuTLS debugging

2516

1914

.gnutls_global_set_log_function(debug_gnutls))

2517

1915

2518

1916

# Redirect stdin so all checkers get /dev/null

2519

null = os.open(os.devnull, os.O_NOCTTY | os.O_RDWR)

1917

null = os.open(os.path.devnull, os.O_NOCTTY | os.O_RDWR)

2520

1918

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

2521

1919

if null > 2:

2522

1920

os.close(null)

1921

else:

1922

# No console logging

1923

logger.removeHandler(console)

2523

1924

2524

1925

# Need to fork before connecting to D-Bus

2525

if not foreground:

1926

if not debug:

2526

1927

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

2527

1928

daemon()

2528

1929

2529

# multiprocessing will use threads, so before we use gobject we

2530

# need to inform gobject that threads will be used.

2531

gobject.threads_init()

2532

2533

1930

global main_loop

2534

1931

# From the Avahi example code

2535

DBusGMainLoop(set_as_default=True)

1932

DBusGMainLoop(set_as_default=True )

2536

1933

main_loop = gobject.MainLoop()

2537

1934

bus = dbus.SystemBus()

2538

1935

# End of Avahi example code

2539

1936

if use_dbus:

2540

1937

try:

2541

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

2542

bus, do_not_queue=True)

2543

old_bus_name = (dbus.service.BusName

2544

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

2545

do_not_queue=True))

1938

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

1939

bus, do_not_queue=True)

1940

bus_name2 = dbus.service.BusName("se.recompile.Mandos",

1941

bus, do_not_queue=True)

2546

1942

except dbus.exceptions.NameExistsException as e:

2547

logger.error("Disabling D-Bus:", exc_info=e)

1943

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

2548

1944

use_dbus = False

2549

1945

server_settings["use_dbus"] = False

2550

1946

tcp_server.use_dbus = False

2551

if zeroconf:

2552

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2553

service = AvahiServiceToSyslog(name =

2554

server_settings["servicename"],

2555

servicetype = "_mandos._tcp",

2556

protocol = protocol, bus = bus)

2557

if server_settings["interface"]:

2558

service.interface = (if_nametoindex

2559

(server_settings["interface"]

2560

.encode("utf-8")))

1947

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1948

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

1949

servicetype = "_mandos._tcp",

1950

protocol = protocol, bus = bus)

1951

if server_settings["interface"]:

1952

service.interface = (if_nametoindex

1953

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

2561

1954

2562

1955

global multiprocessing_manager

2563

1956

multiprocessing_manager = multiprocessing.Manager()

2564

1957

2565

1958

client_class = Client

2566

1959

if use_dbus:

2567

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

2568

2569

client_settings = Client.config_parser(client_config)

2570

old_client_settings = {}

2571

clients_data = {}

2572

2573

# This is used to redirect stdout and stderr for checker processes

2574

global wnull

2575

wnull = open(os.devnull, "w") # A writable /dev/null

2576

# Only used if server is running in foreground but not in debug

2577

# mode

2578

if debug or not foreground:

2579

wnull.close()

2580

2581

# Get client data and settings from last running state.

2582

if server_settings["restore"]:

2583

try:

2584

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

2585

clients_data, old_client_settings = (pickle.load

2586

(stored_state))

2587

os.remove(stored_state_path)

2588

except IOError as e:

2589

if e.errno == errno.ENOENT:

2590

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

2591

.format(os.strerror(e.errno)))

2592

else:

2593

logger.critical("Could not load persistent state:",

2594

exc_info=e)

2595

raise

2596

except EOFError as e:

2597

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

2598

"EOFError:", exc_info=e)

2599

2600

with PGPEngine() as pgp:

2601

for client_name, client in clients_data.items():

2602

# Skip removed clients

2603

if client_name not in client_settings:

2604

continue

2605

2606

# Decide which value to use after restoring saved state.

2607

# We have three different values: Old config file,

2608

# new config file, and saved state.

2609

# New config value takes precedence if it differs from old

2610

# config value, otherwise use saved state.

2611

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

2612

try:

2613

# For each value in new config, check if it

2614

# differs from the old config value (Except for

2615

# the "secret" attribute)

2616

if (name != "secret" and

2617

value != old_client_settings[client_name]

2618

[name]):

2619

client[name] = value

2620

except KeyError:

2621

pass

2622

2623

# Clients who has passed its expire date can still be

2624

# enabled if its last checker was successful. Clients

2625

# whose checker succeeded before we stored its state is

2626

# assumed to have successfully run all checkers during

2627

# downtime.

2628

if client["enabled"]:

2629

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

2630

if not client["last_checked_ok"]:

2631

logger.warning(

2632

"disabling client {} - Client never "

2633

"performed a successful checker"

2634

.format(client_name))

2635

client["enabled"] = False

2636

elif client["last_checker_status"] != 0:

2637

logger.warning(

2638

"disabling client {} - Client last"

2639

" checker failed with error code {}"

2640

.format(client_name,

2641

client["last_checker_status"]))

2642

client["enabled"] = False

2643

else:

2644

client["expires"] = (datetime.datetime

2645

.utcnow()

2646

+ client["timeout"])

2647

logger.debug("Last checker succeeded,"

2648

" keeping {} enabled"

2649

.format(client_name))

1960

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

1961

def client_config_items(config, section):

1962

special_settings = {

1963

"approved_by_default":

1964

lambda: config.getboolean(section,

1965

"approved_by_default"),

1966

}

1967

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

2650

1968

try:

2651

client["secret"] = (

2652

pgp.decrypt(client["encrypted_secret"],

2653

client_settings[client_name]

2654

["secret"]))

2655

except PGPError:

2656

# If decryption fails, we use secret from new settings

2657

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

2658

.format(client_name))

2659

client["secret"] = (

2660

client_settings[client_name]["secret"])

2661

2662

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

2663

for client_name in (set(old_client_settings)

2664

- set(client_settings)):

2665

del clients_data[client_name]

2666

for client_name in (set(client_settings)

2667

- set(old_client_settings)):

2668

clients_data[client_name] = client_settings[client_name]

2669

2670

# Create all client objects

2671

for client_name, client in clients_data.items():

2672

tcp_server.clients[client_name] = client_class(

2673

name = client_name, settings = client,

2674

server_settings = server_settings)

2675

1969

yield (name, special_settings[name]())

1970

except KeyError:

1971

yield (name, value)

1972

1973

tcp_server.clients.update(set(

1974

client_class(name = section,

1975

config= dict(client_config_items(

1976

client_config, section)))

1977

for section in client_config.sections()))

2676

1978

if not tcp_server.clients:

2677

1979

logger.warning("No clients defined")

2678

2679

if not foreground:

2680

if pidfile is not None:

2681

try:

2682

with pidfile:

2683

pid = os.getpid()

2684

pidfile.write("{}\n".format(pid).encode("utf-8"))

2685

except IOError:

2686

logger.error("Could not write to file %r with PID %d",

2687

pidfilename, pid)

2688

del pidfile

1980

1981

if not debug:

1982

try:

1983

with pidfile:

1984

pid = os.getpid()

1985

pidfile.write(str(pid) + "\n".encode("utf-8"))

1986

del pidfile

1987

except IOError:

1988

logger.error("Could not write to file %r with PID %d",

1989

pidfilename, pid)

1990

except NameError:

1991

# "pidfile" was never created

1992

pass

2689

1993

del pidfilename

1994

1995

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

2690

1996

2691

1997

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

2692

1998

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

2693

1999

2694

2000

if use_dbus:

2695

@alternate_dbus_interfaces({"se.recompile.Mandos":

2696

"se.bsnet.fukt.Mandos"})

2697

class MandosDBusService(DBusObjectWithProperties):

2001

class MandosDBusService(dbus.service.Object):

2698

2002

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

2699

2003

def __init__(self):

2700

2004

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

2701

_interface = "se.recompile.Mandos"

2702

2703

@dbus_interface_annotations(_interface)

2704

def _foo(self):

2705

return { "org.freedesktop.DBus.Property"

2706

".EmitsChangedSignal":

2707

"false"}

2005

_interface = "se.bsnet.fukt.Mandos"

2708

2006

2709

2007

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

2710

2008

def ClientAdded(self, objpath):

2725

2023

def GetAllClients(self):

2726

2024

"D-Bus method"

2727

2025

return dbus.Array(c.dbus_object_path

2728

for c in

2729

tcp_server.clients.itervalues())

2026

for c in tcp_server.clients)

2730

2027

2731

2028

@dbus.service.method(_interface,

2732

2029

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

2733

2030

def GetAllClientsWithProperties(self):

2734

2031

"D-Bus method"

2735

2032

return dbus.Dictionary(

2736

{ c.dbus_object_path: c.GetAll("")

2737

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

2033

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

2034

for c in tcp_server.clients),

2738

2035

signature="oa{sv}")

2739

2036

2740

2037

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

2741

2038

def RemoveClient(self, object_path):

2742

2039

"D-Bus method"

2743

for c in tcp_server.clients.itervalues():

2040

for c in tcp_server.clients:

2744

2041

if c.dbus_object_path == object_path:

2745

del tcp_server.clients[c.name]

2042

tcp_server.clients.remove(c)

2746

2043

c.remove_from_connection()

2747

2044

# Don't signal anything except ClientRemoved

2748

2045

c.disable(quiet=True)

2753

2050

2754

2051

del _interface

2755

2052

2756

mandos_dbus_service = MandosDBusService()

2053

class MandosDBusServiceTransitional(MandosDBusService):

2054

__metaclass__ = transitional_dbus_metaclass

2055

mandos_dbus_service = MandosDBusServiceTransitional()

2757

2056

2758

2057

def cleanup():

2759

2058

"Cleanup function; run on exit"

2760

if zeroconf:

2761

service.cleanup()

2762

2763

multiprocessing.active_children()

2764

wnull.close()

2765

if not (tcp_server.clients or client_settings):

2766

return

2767

2768

# Store client before exiting. Secrets are encrypted with key

2769

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

2770

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

2771

clients = {}

2772

with PGPEngine() as pgp:

2773

for client in tcp_server.clients.itervalues():

2774

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

2775

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

2776

key)

2777

client_dict = {}

2778

2779

# A list of attributes that can not be pickled

2780

# + secret.

2781

exclude = { "bus", "changedstate", "secret",

2782

"checker", "server_settings" }

2783

for name, typ in (inspect.getmembers

2784

(dbus.service.Object)):

2785

exclude.add(name)

2786

2787

client_dict["encrypted_secret"] = (client

2788

.encrypted_secret)

2789

for attr in client.client_structure:

2790

if attr not in exclude:

2791

client_dict[attr] = getattr(client, attr)

2792

2793

clients[client.name] = client_dict

2794

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

2795

2796

try:

2797

with (tempfile.NamedTemporaryFile

2798

(mode='wb', suffix=".pickle", prefix='clients-',

2799

dir=os.path.dirname(stored_state_path),

2800

delete=False)) as stored_state:

2801

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

2802

tempname=stored_state.name

2803

os.rename(tempname, stored_state_path)

2804

except (IOError, OSError) as e:

2805

if not debug:

2806

try:

2807

os.remove(tempname)

2808

except NameError:

2809

pass

2810

if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):

2811

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

2812

.format(os.strerror(e.errno)))

2813

else:

2814

logger.warning("Could not save persistent state:",

2815

exc_info=e)

2816

raise

2817

2818

# Delete all clients, and settings from config

2059

service.cleanup()

2060

2819

2061

while tcp_server.clients:

2820

name, client = tcp_server.clients.popitem()

2062

client = tcp_server.clients.pop()

2821

2063

if use_dbus:

2822

2064

client.remove_from_connection()

2065

client.disable_hook = None

2823

2066

# Don't signal anything except ClientRemoved

2824

2067

client.disable(quiet=True)

2825

2068

if use_dbus:

2826

2069

# Emit D-Bus signal

2827

mandos_dbus_service.ClientRemoved(client

2828

.dbus_object_path,

2070

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2829

2071

client.name)

2830

client_settings.clear()

2831

2072

2832

2073

atexit.register(cleanup)

2833

2074

2834

for client in tcp_server.clients.itervalues():

2075

for client in tcp_server.clients:

2835

2076

if use_dbus:

2836

2077

# Emit D-Bus signal

2837

2078

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2838

# Need to initiate checking of clients

2839

if client.enabled:

2840

client.init_checker()

2079

client.enable()

2841

2080

2842

2081

tcp_server.enable()

2843

2082

tcp_server.server_activate()

2844

2083

2845

2084

# Find out what port we got

2846

if zeroconf:

2847

service.port = tcp_server.socket.getsockname()[1]

2085

service.port = tcp_server.socket.getsockname()[1]

2848

2086

if use_ipv6:

2849

2087

logger.info("Now listening on address %r, port %d,"

2850

" flowinfo %d, scope_id %d",

2851

*tcp_server.socket.getsockname())

2088

" flowinfo %d, scope_id %d"

2089

% tcp_server.socket.getsockname())

2852

2090

else: # IPv4

2853

logger.info("Now listening on address %r, port %d",

2854

*tcp_server.socket.getsockname())

2091

logger.info("Now listening on address %r, port %d"

2092

% tcp_server.socket.getsockname())

2855

2093

2856

2094

#service.interface = tcp_server.socket.getsockname()[3]

2857

2095

2858

2096

try:

2859

if zeroconf:

2860

# From the Avahi example code

2861

try:

2862

service.activate()

2863

except dbus.exceptions.DBusException as error:

2864

logger.critical("D-Bus Exception", exc_info=error)

2865

cleanup()

2866

sys.exit(1)

2867

# End of Avahi example code

2097

# From the Avahi example code

2098

try:

2099

service.activate()

2100

except dbus.exceptions.DBusException as error:

2101

logger.critical("DBusException: %s", error)

2102

cleanup()

2103

sys.exit(1)

2104

# End of Avahi example code

2868

2105

2869

2106

gobject.io_add_watch(tcp_server.fileno(), gobject.IO_IN,

2870

2107

lambda *args, **kwargs:

2874

2111

logger.debug("Starting main loop")

2875

2112

main_loop.run()

2876

2113

except AvahiError as error:

2877

logger.critical("Avahi Error", exc_info=error)

2114

logger.critical("AvahiError: %s", error)

2878

2115

cleanup()

2879

2116

sys.exit(1)

2880

2117

except KeyboardInterrupt:

2885

2122

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

2886

2123

cleanup()

2887

2124

2125

2888

2126

if __name__ == '__main__':

2889

2127

main()