/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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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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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 datetime

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import ConfigParser as configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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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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try:

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import gobject

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except ImportError:

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from gi.repository import GObject as gobject

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import gobject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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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")).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 = 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(

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dir=self.tempdir) 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(

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dir = self.tempdir) 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 = 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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class AvahiGroupError(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,

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interface = avahi.IF_UNSPEC,

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name = None,

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servicetype = None,

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port = None,

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TXT = None,

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domain = "",

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host = "",

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max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

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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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protocol = avahi.PROTO_UNSPEC, bus = None):

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self.interface = interface

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self.name = name

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self.type = servicetype

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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(

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self.server.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}".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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bad_states = {

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avahi.SERVER_INVALID: "Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION: "Zeroconf server name collision",

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avahi.SERVER_FAILURE: "Zeroconf server failure",

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}

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bad_states = { avahi.SERVER_INVALID:

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"Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION:

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"Zeroconf server name collision",

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avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

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if state in bad_states:

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if bad_states[state] is not None:

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if error is None:

400

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

401

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else:

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

403

404

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def activate(self):

405

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

406

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if self.server is None:

410

261

follow_name_owner_changes=True),

411

262

avahi.DBUS_INTERFACE_SERVER)

412

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self.server.connect_to_signal("StateChanged",

413

self.server_state_changed)

264

self.server_state_changed)

414

265

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

415

266

416

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class AvahiServiceToSyslog(AvahiService):

418

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

419

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

420

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

421

syslogger.setFormatter(logging.Formatter(

422

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

423

.format(self.name)))

424

return ret

425

426

def call_pipe(connection, # : multiprocessing.Connection

427

func, *args, **kwargs):

428

"""This function is meant to be called by multiprocessing.Process

429

430

This function runs func(*args, **kwargs), and writes the resulting

431

return value on the provided multiprocessing.Connection.

432

"""

433

connection.send(func(*args, **kwargs))

434

connection.close()

435

268

def _timedelta_to_milliseconds(td):

269

"Convert a datetime.timedelta() to milliseconds"

270

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

271

+ (td.seconds * 1000)

272

+ (td.microseconds // 1000))

273

436

274

class Client(object):

437

275

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

438

276

439

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Attributes:

440

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

278

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

441

279

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

442

280

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

443

281

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

450

288

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

451

289

checker_initiator_tag: a gobject event source tag, or None

452

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

453

client_structure: Object describing what attributes a client has

454

and is used for storing the client at exit

455

291

current_checker_command: string; current running checker_command

292

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

456

293

disable_initiator_tag: a gobject event source tag, or None

457

294

enabled: bool()

458

295

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

461

298

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

462

299

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

463

300

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

464

last_checker_status: integer between 0 and 255 reflecting exit

465

status of last checker. -1 reflects crashed

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checker, -2 means no checker completed yet.

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last_checker_signal: The signal which killed the last checker, if

468

last_checker_status is -1

469

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

301

last_enabled: datetime.datetime(); (UTC)

470

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

471

303

D-Bus identifiers

472

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

473

305

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

474

306

until this client is disabled

475

extended_timeout: extra long timeout when secret has been sent

307

extended_timeout: extra long timeout when password has been sent

476

308

runtime_expansions: Allowed attributes for runtime expansion.

477

309

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

478

310

disabled, or None

479

server_settings: The server_settings dict from main()

480

311

"""

481

312

482

313

runtime_expansions = ("approval_delay", "approval_duration",

483

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

484

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

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"last_approval_request", "last_checked_ok",

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

315

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

486

316

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

487

client_defaults = {

488

"timeout": "PT5M",

489

"extended_timeout": "PT15M",

490

"interval": "PT2M",

491

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

492

"host": "",

493

"approval_delay": "PT0S",

494

"approval_duration": "PT1S",

495

"approved_by_default": "True",

496

"enabled": "True",

497

}

498

499

@staticmethod

500

def config_parser(config):

501

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

502

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

503

with exceptions for any special settings as defined above.

504

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

505

value given the same arguments.

506

"""

507

settings = {}

508

for client_name in config.sections():

509

section = dict(config.items(client_name))

510

client = settings[client_name] = {}

511

512

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

513

# Reformat values from string types to Python types

514

client["approved_by_default"] = config.getboolean(

515

client_name, "approved_by_default")

516

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

517

"enabled")

518

519

# Uppercase and remove spaces from fingerprint for later

520

# comparison purposes with return value from the

521

# fingerprint() function

522

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

523

.replace(" ", ""))

524

if "secret" in section:

525

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

526

elif "secfile" in section:

527

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

528

(section["secfile"])),

529

"rb") as secfile:

530

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

531

else:

532

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

533

.format(section))

534

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

535

client["extended_timeout"] = string_to_delta(

536

section["extended_timeout"])

537

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

538

client["approval_delay"] = string_to_delta(

539

section["approval_delay"])

540

client["approval_duration"] = string_to_delta(

541

section["approval_duration"])

542

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

543

client["last_approval_request"] = None

544

client["last_checked_ok"] = None

545

client["last_checker_status"] = -2

546

547

return settings

548

549

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

317

318

def timeout_milliseconds(self):

319

"Return the 'timeout' attribute in milliseconds"

320

return _timedelta_to_milliseconds(self.timeout)

321

322

def extended_timeout_milliseconds(self):

323

"Return the 'extended_timeout' attribute in milliseconds"

324

return _timedelta_to_milliseconds(self.extended_timeout)

325

326

def interval_milliseconds(self):

327

"Return the 'interval' attribute in milliseconds"

328

return _timedelta_to_milliseconds(self.interval)

329

330

def approval_delay_milliseconds(self):

331

return _timedelta_to_milliseconds(self.approval_delay)

332

333

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

334

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

335

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

336

attribute."""

550

337

self.name = name

551

if server_settings is None:

552

server_settings = {}

553

self.server_settings = server_settings

554

# adding all client settings

555

for setting, value in settings.items():

556

setattr(self, setting, value)

557

558

if self.enabled:

559

if not hasattr(self, "last_enabled"):

560

self.last_enabled = datetime.datetime.utcnow()

561

if not hasattr(self, "expires"):

562

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

563

+ self.timeout)

564

else:

565

self.last_enabled = None

566

self.expires = None

567

338

if config is None:

339

config = {}

568

340

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

341

# Uppercase and remove spaces from fingerprint for later

342

# comparison purposes with return value from the fingerprint()

343

# function

344

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

345

.replace(" ", ""))

569

346

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

570

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

571

datetime.datetime.utcnow())

572

573

# attributes specific for this server instance

347

if "secret" in config:

348

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

349

elif "secfile" in config:

350

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

351

(config["secfile"])),

352

"rb") as secfile:

353

self.secret = secfile.read()

354

else:

355

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

356

% self.name)

357

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

358

self.created = datetime.datetime.utcnow()

359

self.enabled = False

360

self.last_approval_request = None

361

self.last_enabled = None

362

self.last_checked_ok = None

363

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

364

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

365

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

366

self.disable_hook = disable_hook

574

367

self.checker = None

575

368

self.checker_initiator_tag = None

576

369

self.disable_initiator_tag = None

370

self.expires = None

577

371

self.checker_callback_tag = None

372

self.checker_command = config["checker"]

578

373

self.current_checker_command = None

579

self.approved = None

374

self.last_connect = None

375

self._approved = None

376

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

377

True)

580

378

self.approvals_pending = 0

581

self.changedstate = multiprocessing_manager.Condition(

582

multiprocessing_manager.Lock())

583

self.client_structure = [attr

584

for attr in self.__dict__.iterkeys()

585

if not attr.startswith("_")]

586

self.client_structure.append("client_structure")

587

588

for name, t in inspect.getmembers(

589

type(self), lambda obj: isinstance(obj, property)):

590

if not name.startswith("_"):

591

self.client_structure.append(name)

379

self.approval_delay = string_to_delta(

380

config["approval_delay"])

381

self.approval_duration = string_to_delta(

382

config["approval_duration"])

383

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

592

384

593

# Send notice to process children that client state has changed

594

385

def send_changedstate(self):

595

with self.changedstate:

596

self.changedstate.notify_all()

597

386

self.changedstate.acquire()

387

self.changedstate.notify_all()

388

self.changedstate.release()

389

598

390

def enable(self):

599

391

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

600

392

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

601

393

# Already enabled

602

394

return

395

self.send_changedstate()

396

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

397

# and every interval from then on.

398

self.checker_initiator_tag = (gobject.timeout_add

399

(self.interval_milliseconds(),

400

self.start_checker))

401

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

603

402

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

403

self.disable_initiator_tag = (gobject.timeout_add

404

(self.timeout_milliseconds(),

405

self.disable))

604

406

self.enabled = True

605

407

self.last_enabled = datetime.datetime.utcnow()

606

self.init_checker()

607

self.send_changedstate()

408

# Also start a new checker *right now*.

409

self.start_checker()

608

410

609

411

def disable(self, quiet=True):

610

412

"""Disable this client."""

611

413

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

612

414

return False

613

415

if not quiet:

416

self.send_changedstate()

417

if not quiet:

614

418

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

615

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

419

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

616

420

gobject.source_remove(self.disable_initiator_tag)

617

421

self.disable_initiator_tag = None

618

422

self.expires = None

619

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

423

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

620

424

gobject.source_remove(self.checker_initiator_tag)

621

425

self.checker_initiator_tag = None

622

426

self.stop_checker()

427

if self.disable_hook:

428

self.disable_hook(self)

623

429

self.enabled = False

624

if not quiet:

625

self.send_changedstate()

626

430

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

627

431

return False

628

432

629

433

def __del__(self):

434

self.disable_hook = None

630

435

self.disable()

631

436

632

def init_checker(self):

633

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

634

# and every interval from then on.

635

if self.checker_initiator_tag is not None:

636

gobject.source_remove(self.checker_initiator_tag)

637

self.checker_initiator_tag = gobject.timeout_add(

638

int(self.interval.total_seconds() * 1000),

639

self.start_checker)

640

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

641

if self.disable_initiator_tag is not None:

642

gobject.source_remove(self.disable_initiator_tag)

643

self.disable_initiator_tag = gobject.timeout_add(

644

int(self.timeout.total_seconds() * 1000), self.disable)

645

# Also start a new checker *right now*.

646

self.start_checker()

647

648

def checker_callback(self, source, condition,

649

(connection, command)):

437

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

650

438

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

651

439

self.checker_callback_tag = None

652

440

self.checker = None

653

# Read return code from connection (see call_pipe)

654

returncode = connection.recv()

655

connection.close()

656

657

if returncode >= 0:

658

self.last_checker_status = returncode

659

self.last_checker_signal = None

660

if self.last_checker_status == 0:

441

if os.WIFEXITED(condition):

442

exitstatus = os.WEXITSTATUS(condition)

443

if exitstatus == 0:

661

444

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

662

445

vars(self))

663

446

self.checked_ok()

664

447

else:

665

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

448

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

449

vars(self))

666

450

else:

667

self.last_checker_status = -1

668

self.last_checker_signal = -returncode

669

451

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

670

452

vars(self))

671

return False

672

673

def checked_ok(self):

674

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

675

self.last_checked_ok = datetime.datetime.utcnow()

676

self.last_checker_status = 0

677

self.last_checker_signal = None

678

self.bump_timeout()

679

680

def bump_timeout(self, timeout=None):

681

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

453

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

"""

682

460

if timeout is None:

683

461

timeout = self.timeout

684

if self.disable_initiator_tag is not None:

685

gobject.source_remove(self.disable_initiator_tag)

686

self.disable_initiator_tag = None

687

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

688

self.disable_initiator_tag = gobject.timeout_add(

689

int(timeout.total_seconds() * 1000), self.disable)

690

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))

691

468

692

469

def need_approval(self):

693

470

self.last_approval_request = datetime.datetime.utcnow()

698

475

If a checker already exists, leave it running and do

699

476

nothing."""

700

477

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

701

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

702

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

703

# would inevitably timeout, since no checker would get a

704

# 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

705

482

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

706

483

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

707

484

# should be.

708

485

709

if self.checker is not None and not self.checker.is_alive():

710

logger.warning("Checker was not alive; joining")

711

self.checker.join()

712

self.checker = None

486

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

487

try:

488

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

489

except (AttributeError, OSError) as error:

490

if (isinstance(error, OSError)

491

and error.errno != errno.ECHILD):

492

raise error

493

else:

494

if pid:

495

logger.warning("Checker was a zombie")

496

gobject.source_remove(self.checker_callback_tag)

497

self.checker_callback(pid, status,

498

self.current_checker_command)

713

499

# Start a new checker if needed

714

500

if self.checker is None:

715

# Escape attributes for the shell

716

escaped_attrs = {

717

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

718

for attr in self.runtime_expansions }

719

501

try:

720

command = self.checker_command % escaped_attrs

721

except TypeError as error:

722

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

723

self.checker_command,

724

exc_info=error)

725

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

726

520

self.current_checker_command = command

727

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

728

self.name)

729

# We don't need to redirect stdout and stderr, since

730

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

731

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

732

# always replaced by /dev/null.)

733

# The exception is when not debugging but nevertheless

734

# running in the foreground; use the previously

735

# created wnull.

736

popen_args = { "close_fds": True,

737

"shell": True,

738

"cwd": "/" }

739

if (not self.server_settings["debug"]

740

and self.server_settings["foreground"]):

741

popen_args.update({"stdout": wnull,

742

"stderr": wnull })

743

pipe = multiprocessing.Pipe(duplex=False)

744

self.checker = multiprocessing.Process(

745

target = call_pipe,

746

args = (subprocess.call, pipe[1], command),

747

kwargs = popen_args)

748

self.checker.start()

749

self.checker_callback_tag = gobject.io_add_watch(

750

pipe[0].fileno(), gobject.IO_IN,

751

self.checker_callback, (pipe[0], command))

521

try:

522

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

523

command, self.name)

524

# We don't need to redirect stdout and stderr, since

525

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

526

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

527

# always replaced by /dev/null.)

528

self.checker = subprocess.Popen(command,

529

close_fds=True,

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.

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)

541

except OSError as error:

542

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

543

error)

752

544

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

753

545

return True

754

546

760

552

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

761

553

return

762

554

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

763

self.checker.terminate()

555

try:

556

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

557

#time.sleep(0.5)

558

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

559

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

560

except OSError as error:

561

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

562

raise

764

563

self.checker = None

765

564

766

565

767

def dbus_service_property(dbus_interface,

768

signature="v",

769

access="readwrite",

770

byte_arrays=False):

566

def dbus_service_property(dbus_interface, signature="v",

567

access="readwrite", byte_arrays=False):

771

568

"""Decorators for marking methods of a DBusObjectWithProperties to

772

569

become properties on the D-Bus.

773

570

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))

786

582

" signature %r" % signature)

787

583

def decorator(func):

788

584

func._dbus_is_property = True

789

585

func._dbus_interface = dbus_interface

794

590

func._dbus_name = func._dbus_name[:-14]

795

591

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

796

592

return func

797

798

return decorator

799

800

801

def dbus_interface_annotations(dbus_interface):

802

"""Decorator for marking functions returning interface annotations

803

804

Usage:

805

806

@dbus_interface_annotations("org.example.Interface")

807

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

808

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

809

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

810

"false"}

811

"""

812

813

def decorator(func):

814

func._dbus_is_interface = True

815

func._dbus_interface = dbus_interface

816

func._dbus_name = dbus_interface

817

return func

818

819

return decorator

820

821

822

def dbus_annotations(annotations):

823

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

824

Usage:

825

826

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

827

"org.freedesktop.DBus.Property."

828

"EmitsChangedSignal": "false"})

829

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

830

access="r")

831

def Property_dbus_property(self):

832

return dbus.Boolean(False)

833

"""

834

835

def decorator(func):

836

func._dbus_annotations = annotations

837

return func

838

839

593

return decorator

840

594

841

595

842

596

class DBusPropertyException(dbus.exceptions.DBusException):

843

597

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

844

598

"""

845

pass

599

def __unicode__(self):

600

return unicode(str(self))

846

601

847

602

848

603

class DBusPropertyAccessException(DBusPropertyException):

866

621

"""

867

622

868

623

@staticmethod

869

def _is_dbus_thing(thing):

870

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

871

872

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

873

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

874

"""

875

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

876

False)

624

def _is_dbus_property(obj):

625

return getattr(obj, "_dbus_is_property", False)

877

626

878

def _get_all_dbus_things(self, thing):

627

def _get_all_dbus_properties(self):

879

628

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

880

629

"""

881

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

882

athing.__get__(self))

630

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

883

631

for cls in self.__class__.__mro__

884

for name, athing in

885

inspect.getmembers(cls, self._is_dbus_thing(thing)))

632

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

886

633

887

634

def _get_dbus_property(self, interface_name, property_name):

888

635

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

889

636

property with the specified name and interface.

890

637

"""

891

for cls in self.__class__.__mro__:

892

for name, value in inspect.getmembers(

893

cls, self._is_dbus_thing("property")):

894

if (value._dbus_name == property_name

895

and value._dbus_interface == interface_name):

638

for cls in self.__class__.__mro__:

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:

896

641

return value.__get__(self)

897

642

898

643

# No such property

899

raise DBusPropertyNotFound("{}:{}.{}".format(

900

self.dbus_object_path, interface_name, property_name))

644

raise DBusPropertyNotFound(self.dbus_object_path + ":"

645

+ interface_name + "."

646

+ property_name)

647

901

648

902

@dbus.service.method(dbus.PROPERTIES_IFACE,

903

in_signature="ss",

649

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

904

650

out_signature="v")

905

651

def Get(self, interface_name, property_name):

906

652

"""Standard D-Bus property Get() method, see D-Bus standard.

924

670

# The byte_arrays option is not supported yet on

925

671

# signatures other than "ay".

926

672

if prop._dbus_signature != "ay":

927

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

928

"'ay' signature {!r}"

929

.format(prop._dbus_signature))

930

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

931

for byte in value))

673

raise ValueError

674

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

675

for byte in value))

932

676

prop(value)

933

677

934

@dbus.service.method(dbus.PROPERTIES_IFACE,

935

in_signature="s",

678

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

936

679

out_signature="a{sv}")

937

680

def GetAll(self, interface_name):

938

681

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

940

683

941

684

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

942

685

"""

943

properties = {}

944

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

686

all = {}

687

for name, prop in self._get_all_dbus_properties():

945

688

if (interface_name

946

689

and interface_name != prop._dbus_interface):

947

690

# Interface non-empty but did not match

951

694

continue

952

695

value = prop()

953

696

if not hasattr(value, "variant_level"):

954

properties[name] = value

697

all[name] = value

955

698

continue

956

properties[name] = type(value)(

957

value, variant_level = value.variant_level + 1)

958

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

959

960

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

961

def PropertiesChanged(self, interface_name, changed_properties,

962

invalidated_properties):

963

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

964

standard.

965

"""

966

pass

699

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

700

value.variant_level+1)

701

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

967

702

968

703

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

969

704

out_signature="s",

970

705

path_keyword='object_path',

971

706

connection_keyword='connection')

972

707

def Introspect(self, object_path, connection):

973

"""Overloading of standard D-Bus method.

974

975

Inserts property tags and interface annotation tags.

708

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

976

709

"""

977

710

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

978

711

connection)

979

712

try:

980

713

document = xml.dom.minidom.parseString(xmlstring)

981

982

714

def make_tag(document, name, prop):

983

715

e = document.createElement("property")

984

716

e.setAttribute("name", name)

985

717

e.setAttribute("type", prop._dbus_signature)

986

718

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

987

719

return e

988

989

720

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

990

# Add property tags

991

721

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

992

722

for name, prop

993

in self._get_all_dbus_things("property")

723

in self._get_all_dbus_properties()

994

724

if prop._dbus_interface

995

725

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

996

726

if_tag.appendChild(tag)

997

# Add annotation tags

998

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

999

for tag in if_tag.getElementsByTagName(typ):

1000

annots = dict()

1001

for name, prop in (self.

1002

_get_all_dbus_things(typ)):

1003

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

1004

and prop._dbus_interface

1005

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

1006

annots.update(getattr(

1007

prop, "_dbus_annotations", {}))

1008

for name, value in annots.items():

1009

ann_tag = document.createElement(

1010

"annotation")

1011

ann_tag.setAttribute("name", name)

1012

ann_tag.setAttribute("value", value)

1013

tag.appendChild(ann_tag)

1014

# Add interface annotation tags

1015

for annotation, value in dict(

1016

itertools.chain.from_iterable(

1017

annotations().items()

1018

for name, annotations

1019

in self._get_all_dbus_things("interface")

1020

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

1021

)).items():

1022

ann_tag = document.createElement("annotation")

1023

ann_tag.setAttribute("name", annotation)

1024

ann_tag.setAttribute("value", value)

1025

if_tag.appendChild(ann_tag)

1026

727

# Add the names to the return values for the

1027

728

# "org.freedesktop.DBus.Properties" methods

1028

729

if (if_tag.getAttribute("name")

1043

744

except (AttributeError, xml.dom.DOMException,

1044

745

xml.parsers.expat.ExpatError) as error:

1045

746

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

1046

exc_info=error)

747

error)

1047

748

return xmlstring

1048

749

1049

750

1050

def datetime_to_dbus(dt, variant_level=0):

751

def datetime_to_dbus (dt, variant_level=0):

1051

752

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

1052

753

if dt is None:

1053

754

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

1054

return dbus.String(dt.isoformat(), variant_level=variant_level)

1055

1056

1057

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1058

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

1059

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

1060

interface names according to the "alt_interface_names" mapping.

1061

Usage:

1062

1063

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

1064

"net.example.AlternateInterface"})

1065

class SampleDBusObject(dbus.service.Object):

1066

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

1067

def SampleDBusMethod():

1068

pass

1069

1070

The above "SampleDBusMethod" on "SampleDBusObject" will be

1071

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

1072

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

1073

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

1074

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

1075

1076

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

1077

(from DBusObjectWithProperties) and interfaces (from the

1078

dbus_interface_annotations decorator).

1079

"""

1080

1081

def wrapper(cls):

1082

for orig_interface_name, alt_interface_name in (

1083

alt_interface_names.items()):

1084

attr = {}

1085

interface_names = set()

1086

# Go though all attributes of the class

1087

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

1088

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

1089

# with the wrong interface name

1090

if (not hasattr(attribute, "_dbus_interface")

1091

or not attribute._dbus_interface.startswith(

1092

orig_interface_name)):

1093

continue

1094

# Create an alternate D-Bus interface name based on

1095

# the current name

1096

alt_interface = attribute._dbus_interface.replace(

1097

orig_interface_name, alt_interface_name)

1098

interface_names.add(alt_interface)

1099

# Is this a D-Bus signal?

1100

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

1101

# Extract the original non-method undecorated

1102

# function by black magic

1103

nonmethod_func = (dict(

1104

zip(attribute.func_code.co_freevars,

1105

attribute.__closure__))

1106

["func"].cell_contents)

1107

# Create a new, but exactly alike, function

1108

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

1109

# with the alternate D-Bus interface name

1110

new_function = (dbus.service.signal(

1111

alt_interface, attribute._dbus_signature)

1112

(types.FunctionType(

1113

nonmethod_func.func_code,

1114

nonmethod_func.func_globals,

1115

nonmethod_func.func_name,

1116

nonmethod_func.func_defaults,

1117

nonmethod_func.func_closure)))

1118

# Copy annotations, if any

1119

try:

1120

new_function._dbus_annotations = dict(

1121

attribute._dbus_annotations)

1122

except AttributeError:

1123

pass

1124

# Define a creator of a function to call both the

1125

# original and alternate functions, so both the

1126

# original and alternate signals gets sent when

1127

# the function is called

1128

def fixscope(func1, func2):

1129

"""This function is a scope container to pass

1130

func1 and func2 to the "call_both" function

1131

outside of its arguments"""

1132

1133

def call_both(*args, **kwargs):

1134

"""This function will emit two D-Bus

1135

signals by calling func1 and func2"""

1136

func1(*args, **kwargs)

1137

func2(*args, **kwargs)

1138

1139

return call_both

1140

# Create the "call_both" function and add it to

1141

# the class

1142

attr[attrname] = fixscope(attribute, new_function)

1143

# Is this a D-Bus method?

1144

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

1145

# Create a new, but exactly alike, function

1146

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

1147

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

1148

# to the class.

1149

attr[attrname] = (

1150

dbus.service.method(

1151

alt_interface,

1152

attribute._dbus_in_signature,

1153

attribute._dbus_out_signature)

1154

(types.FunctionType(attribute.func_code,

1155

attribute.func_globals,

1156

attribute.func_name,

1157

attribute.func_defaults,

1158

attribute.func_closure)))

1159

# Copy annotations, if any

1160

try:

1161

attr[attrname]._dbus_annotations = dict(

1162

attribute._dbus_annotations)

1163

except AttributeError:

1164

pass

1165

# Is this a D-Bus property?

1166

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

1167

# Create a new, but exactly alike, function

1168

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

1169

# property with the alternate D-Bus interface

1170

# name. Add it to the class.

1171

attr[attrname] = (dbus_service_property(

1172

alt_interface, attribute._dbus_signature,

1173

attribute._dbus_access,

1174

attribute._dbus_get_args_options

1175

["byte_arrays"])

1176

(types.FunctionType(

1177

attribute.func_code,

1178

attribute.func_globals,

1179

attribute.func_name,

1180

attribute.func_defaults,

1181

attribute.func_closure)))

1182

# Copy annotations, if any

1183

try:

1184

attr[attrname]._dbus_annotations = dict(

1185

attribute._dbus_annotations)

1186

except AttributeError:

1187

pass

1188

# Is this a D-Bus interface?

1189

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

1190

# Create a new, but exactly alike, function

1191

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

1192

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

1193

# to the class.

1194

attr[attrname] = (

1195

dbus_interface_annotations(alt_interface)

1196

(types.FunctionType(attribute.func_code,

1197

attribute.func_globals,

1198

attribute.func_name,

1199

attribute.func_defaults,

1200

attribute.func_closure)))

1201

if deprecate:

1202

# Deprecate all alternate interfaces

1203

iname="_AlternateDBusNames_interface_annotation{}"

1204

for interface_name in interface_names:

1205

1206

@dbus_interface_annotations(interface_name)

1207

def func(self):

1208

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

1209

"true" }

1210

# Find an unused name

1211

for aname in (iname.format(i)

1212

for i in itertools.count()):

1213

if aname not in attr:

1214

attr[aname] = func

1215

break

1216

if interface_names:

1217

# Replace the class with a new subclass of it with

1218

# methods, signals, etc. as created above.

1219

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

1220

(cls, ), attr)

1221

return cls

1222

1223

return wrapper

1224

1225

1226

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

1227

"se.bsnet.fukt.Mandos"})

755

return dbus.String(dt.isoformat(),

756

variant_level=variant_level)

757

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

1228

814

class ClientDBus(Client, DBusObjectWithProperties):

1229

815

"""A Client class using D-Bus

1230

816

1234

820

"""

1235

821

1236

822

runtime_expansions = (Client.runtime_expansions

1237

+ ("dbus_object_path", ))

1238

1239

_interface = "se.recompile.Mandos.Client"

823

+ ("dbus_object_path",))

1240

824

1241

825

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

1242

826

1243

827

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

828

self._approvals_pending = 0

1244

829

self.bus = bus

1245

830

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

1246

831

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

1247

832

# the D-Bus

1248

client_object_name = str(self.name).translate(

833

client_object_name = unicode(self.name).translate(

1249

834

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

1250

835

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

1251

self.dbus_object_path = dbus.ObjectPath(

1252

"/clients/" + client_object_name)

836

self.dbus_object_path = (dbus.ObjectPath

837

("/clients/" + client_object_name))

1253

838

DBusObjectWithProperties.__init__(self, self.bus,

1254

839

self.dbus_object_path)

1255

1256

def notifychangeproperty(transform_func, dbus_name,

1257

type_func=lambda x: x,

1258

variant_level=1,

1259

invalidate_only=False,

1260

_interface=_interface):

1261

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

1262

its changes to DBus.

1263

840

1264

transform_fun: Function that takes a value and a variant_level

1265

and transforms it to a D-Bus type.

1266

dbus_name: D-Bus name of the variable

841

def notifychangeproperty(transform_func,

842

dbus_name, type_func=lambda x: x,

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

1267

849

type_func: Function that transform the value before sending it

1268

to the D-Bus. Default: no transform

1269

variant_level: D-Bus variant level. Default: 1

850

to DBus

851

variant_level: DBus variant level. default: 1

1270

852

"""

1271

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

1272

853

real_value = [None,]

1273

854

def setter(self, value):

855

old_value = real_value[0]

856

real_value[0] = value

1274

857

if hasattr(self, "dbus_object_path"):

1275

if (not hasattr(self, attrname) or

1276

type_func(getattr(self, attrname, None))

1277

!= type_func(value)):

1278

if invalidate_only:

1279

self.PropertiesChanged(

1280

_interface, dbus.Dictionary(),

1281

dbus.Array((dbus_name, )))

1282

else:

1283

dbus_value = transform_func(

1284

type_func(value),

1285

variant_level = variant_level)

1286

self.PropertyChanged(dbus.String(dbus_name),

1287

dbus_value)

1288

self.PropertiesChanged(

1289

_interface,

1290

dbus.Dictionary({ dbus.String(dbus_name):

1291

dbus_value }),

1292

dbus.Array())

1293

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)

1294

863

1295

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

864

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

865

1296

866

1297

867

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1298

868

approvals_pending = notifychangeproperty(dbus.Boolean,

1301

871

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

1302

872

last_enabled = notifychangeproperty(datetime_to_dbus,

1303

873

"LastEnabled")

1304

checker = notifychangeproperty(

1305

dbus.Boolean, "CheckerRunning",

1306

type_func = lambda checker: checker is not None)

874

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

875

type_func = lambda checker: checker is not None)

1307

876

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1308

877

"LastCheckedOK")

1309

last_checker_status = notifychangeproperty(dbus.Int16,

1310

"LastCheckerStatus")

1311

last_approval_request = notifychangeproperty(

1312

datetime_to_dbus, "LastApprovalRequest")

878

last_approval_request = notifychangeproperty(datetime_to_dbus,

879

"LastApprovalRequest")

1313

880

approved_by_default = notifychangeproperty(dbus.Boolean,

1314

881

"ApprovedByDefault")

1315

approval_delay = notifychangeproperty(

1316

dbus.UInt64, "ApprovalDelay",

1317

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

1318

approval_duration = notifychangeproperty(

1319

dbus.UInt64, "ApprovalDuration",

1320

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)

1321

886

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

1322

timeout = notifychangeproperty(

1323

dbus.UInt64, "Timeout",

1324

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

1325

extended_timeout = notifychangeproperty(

1326

dbus.UInt64, "ExtendedTimeout",

1327

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

1328

interval = notifychangeproperty(

1329

dbus.UInt64, "Interval",

1330

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

1331

893

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

1332

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

1333

invalidate_only=True)

1334

894

1335

895

del notifychangeproperty

1336

896

1343

903

DBusObjectWithProperties.__del__(self, *args, **kwargs)

1344

904

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

1345

905

1346

def checker_callback(self, source, condition,

1347

(connection, command), *args, **kwargs):

1348

ret = Client.checker_callback(self, source, condition,

1349

(connection, command), *args,

1350

**kwargs)

1351

exitstatus = self.last_checker_status

1352

if exitstatus >= 0:

906

def checker_callback(self, pid, condition, command,

907

*args, **kwargs):

908

self.checker_callback_tag = None

909

self.checker = None

910

if os.WIFEXITED(condition):

911

exitstatus = os.WEXITSTATUS(condition)

1353

912

# Emit D-Bus signal

1354

913

self.CheckerCompleted(dbus.Int16(exitstatus),

1355

dbus.Int64(0),

914

dbus.Int64(condition),

1356

915

dbus.String(command))

1357

916

else:

1358

917

# Emit D-Bus signal

1359

918

self.CheckerCompleted(dbus.Int16(-1),

1360

dbus.Int64(

1361

self.last_checker_signal),

919

dbus.Int64(condition),

1362

920

dbus.String(command))

1363

return ret

921

922

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

923

*args, **kwargs)

1364

924

1365

925

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

1366

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

1367

931

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

1368

932

# Only if new checker process was started

1369

933

if (self.checker is not None

1373

937

return r

1374

938

1375

939

def _reset_approved(self):

1376

self.approved = None

940

self._approved = None

1377

941

return False

1378

942

1379

943

def approve(self, value=True):

1380

self.approved = value

1381

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

1382

* 1000), self._reset_approved)

1383

944

self.send_changedstate()

945

self._approved = value

946

gobject.timeout_add(_timedelta_to_milliseconds

947

(self.approval_duration),

948

self._reset_approved)

949

1384

950

1385

951

## D-Bus methods, signals & properties

1386

1387

## Interfaces

1388

952

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

953

1389

954

## Signals

1390

955

1391

956

# CheckerCompleted - signal

1401

966

pass

1402

967

1403

968

# PropertyChanged - signal

1404

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

1405

969

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

1406

970

def PropertyChanged(self, property, value):

1407

971

"D-Bus signal"

1471

1035

return dbus.Boolean(bool(self.approvals_pending))

1472

1036

1473

1037

# ApprovedByDefault - property

1474

@dbus_service_property(_interface,

1475

signature="b",

1038

@dbus_service_property(_interface, signature="b",

1476

1039

access="readwrite")

1477

1040

def ApprovedByDefault_dbus_property(self, value=None):

1478

1041

if value is None: # get

1480

1043

self.approved_by_default = bool(value)

1481

1044

1482

1045

# ApprovalDelay - property

1483

@dbus_service_property(_interface,

1484

signature="t",

1046

@dbus_service_property(_interface, signature="t",

1485

1047

access="readwrite")

1486

1048

def ApprovalDelay_dbus_property(self, value=None):

1487

1049

if value is None: # get

1488

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

1489

* 1000)

1050

return dbus.UInt64(self.approval_delay_milliseconds())

1490

1051

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

1491

1052

1492

1053

# ApprovalDuration - property

1493

@dbus_service_property(_interface,

1494

signature="t",

1054

@dbus_service_property(_interface, signature="t",

1495

1055

access="readwrite")

1496

1056

def ApprovalDuration_dbus_property(self, value=None):

1497

1057

if value is None: # get

1498

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

1499

* 1000)

1058

return dbus.UInt64(_timedelta_to_milliseconds(

1059

self.approval_duration))

1500

1060

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

1501

1061

1502

1062

# Name - property

1510

1070

return dbus.String(self.fingerprint)

1511

1071

1512

1072

# Host - property

1513

@dbus_service_property(_interface,

1514

signature="s",

1073

@dbus_service_property(_interface, signature="s",

1515

1074

access="readwrite")

1516

1075

def Host_dbus_property(self, value=None):

1517

1076

if value is None: # get

1518

1077

return dbus.String(self.host)

1519

self.host = str(value)

1078

self.host = value

1520

1079

1521

1080

# Created - property

1522

1081

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

1523

1082

def Created_dbus_property(self):

1524

return datetime_to_dbus(self.created)

1083

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

1525

1084

1526

1085

# LastEnabled - property

1527

1086

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

1529

1088

return datetime_to_dbus(self.last_enabled)

1530

1089

1531

1090

# Enabled - property

1532

@dbus_service_property(_interface,

1533

signature="b",

1091

@dbus_service_property(_interface, signature="b",

1534

1092

access="readwrite")

1535

1093

def Enabled_dbus_property(self, value=None):

1536

1094

if value is None: # get

1541

1099

self.disable()

1542

1100

1543

1101

# LastCheckedOK - property

1544

@dbus_service_property(_interface,

1545

signature="s",

1102

@dbus_service_property(_interface, signature="s",

1546

1103

access="readwrite")

1547

1104

def LastCheckedOK_dbus_property(self, value=None):

1548

1105

if value is not None:

1550

1107

return

1551

1108

return datetime_to_dbus(self.last_checked_ok)

1552

1109

1553

# LastCheckerStatus - property

1554

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

1555

def LastCheckerStatus_dbus_property(self):

1556

return dbus.Int16(self.last_checker_status)

1557

1558

1110

# Expires - property

1559

1111

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

1560

1112

def Expires_dbus_property(self):

1566

1118

return datetime_to_dbus(self.last_approval_request)

1567

1119

1568

1120

# Timeout - property

1569

@dbus_service_property(_interface,

1570

signature="t",

1121

@dbus_service_property(_interface, signature="t",

1571

1122

access="readwrite")

1572

1123

def Timeout_dbus_property(self, value=None):

1573

1124

if value is None: # get

1574

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

1575

old_timeout = self.timeout

1125

return dbus.UInt64(self.timeout_milliseconds())

1576

1126

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

1577

# Reschedule disabling

1578

if self.enabled:

1579

now = datetime.datetime.utcnow()

1580

self.expires += self.timeout - old_timeout

1581

if self.expires <= now:

1582

# The timeout has passed

1583

self.disable()

1584

else:

1585

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

1586

is None):

1587

return

1588

gobject.source_remove(self.disable_initiator_tag)

1589

self.disable_initiator_tag = gobject.timeout_add(

1590

int((self.expires - now).total_seconds() * 1000),

1591

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))

1592

1147

1593

1148

# ExtendedTimeout - property

1594

@dbus_service_property(_interface,

1595

signature="t",

1149

@dbus_service_property(_interface, signature="t",

1596

1150

access="readwrite")

1597

1151

def ExtendedTimeout_dbus_property(self, value=None):

1598

1152

if value is None: # get

1599

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

1600

* 1000)

1153

return dbus.UInt64(self.extended_timeout_milliseconds())

1601

1154

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

1602

1155

1603

1156

# Interval - property

1604

@dbus_service_property(_interface,

1605

signature="t",

1157

@dbus_service_property(_interface, signature="t",

1606

1158

access="readwrite")

1607

1159

def Interval_dbus_property(self, value=None):

1608

1160

if value is None: # get

1609

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

1161

return dbus.UInt64(self.interval_milliseconds())

1610

1162

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

1611

1163

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

1612

1164

return

1613

if self.enabled:

1614

# Reschedule checker run

1615

gobject.source_remove(self.checker_initiator_tag)

1616

self.checker_initiator_tag = gobject.timeout_add(

1617

value, self.start_checker)

1618

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

1619

1170

1620

1171

# Checker - property

1621

@dbus_service_property(_interface,

1622

signature="s",

1172

@dbus_service_property(_interface, signature="s",

1623

1173

access="readwrite")

1624

1174

def Checker_dbus_property(self, value=None):

1625

1175

if value is None: # get

1626

1176

return dbus.String(self.checker_command)

1627

self.checker_command = str(value)

1177

self.checker_command = value

1628

1178

1629

1179

# CheckerRunning - property

1630

@dbus_service_property(_interface,

1631

signature="b",

1180

@dbus_service_property(_interface, signature="b",

1632

1181

access="readwrite")

1633

1182

def CheckerRunning_dbus_property(self, value=None):

1634

1183

if value is None: # get

1644

1193

return self.dbus_object_path # is already a dbus.ObjectPath

1645

1194

1646

1195

# Secret = property

1647

@dbus_service_property(_interface,

1648

signature="ay",

1649

access="write",

1650

byte_arrays=True)

1196

@dbus_service_property(_interface, signature="ay",

1197

access="write", byte_arrays=True)

1651

1198

def Secret_dbus_property(self, value):

1652

self.secret = bytes(value)

1199

self.secret = str(value)

1653

1200

1654

1201

del _interface

1655

1202

1662

1209

raise KeyError()

1663

1210

1664

1211

def __getattribute__(self, name):

1665

if name == '_pipe':

1212

if(name == '_pipe'):

1666

1213

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

1667

1214

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

1668

1215

data = self._pipe.recv()

1669

1216

if data[0] == 'data':

1670

1217

return data[1]

1671

1218

if data[0] == 'function':

1672

1673

1219

def func(*args, **kwargs):

1674

1220

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

1675

1221

return self._pipe.recv()[1]

1676

1677

1222

return func

1678

1223

1679

1224

def __setattr__(self, name, value):

1680

if name == '_pipe':

1225

if(name == '_pipe'):

1681

1226

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

1682

1227

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

1683

1228

1229

class ClientDBusTransitional(ClientDBus):

1230

__metaclass__ = transitional_dbus_metaclass

1684

1231

1685

1232

class ClientHandler(socketserver.BaseRequestHandler, object):

1686

1233

"""A class to handle client connections.

1691

1238

def handle(self):

1692

1239

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

1693

1240

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

1694

str(self.client_address))

1241

unicode(self.client_address))

1695

1242

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

1696

1243

self.server.child_pipe.fileno())

1697

1244

1698

session = gnutls.connection.ClientSession(

1699

self.request, gnutls.connection .X509Credentials())

1245

session = (gnutls.connection

1246

.ClientSession(self.request,

1247

gnutls.connection

1248

.X509Credentials()))

1700

1249

1701

1250

# Note: gnutls.connection.X509Credentials is really a

1702

1251

# generic GnuTLS certificate credentials object so long as

1711

1260

priority = self.server.gnutls_priority

1712

1261

if priority is None:

1713

1262

priority = "NORMAL"

1714

gnutls.library.functions.gnutls_priority_set_direct(

1715

session._c_object, priority, None)

1263

(gnutls.library.functions

1264

.gnutls_priority_set_direct(session._c_object,

1265

priority, None))

1716

1266

1717

1267

# Start communication using the Mandos protocol

1718

1268

# Get protocol number

1720

1270

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

1721

1271

try:

1722

1272

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

1723

raise RuntimeError(line)

1273

raise RuntimeError

1724

1274

except (ValueError, IndexError, RuntimeError) as error:

1725

1275

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

1726

1276

return

1738

1288

approval_required = False

1739

1289

try:

1740

1290

try:

1741

fpr = self.fingerprint(

1742

self.peer_certificate(session))

1291

fpr = self.fingerprint(self.peer_certificate

1292

(session))

1743

1293

except (TypeError,

1744

1294

gnutls.errors.GNUTLSError) as error:

1745

1295

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

1760

1310

while True:

1761

1311

if not client.enabled:

1762

1312

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

1763

client.name)

1313

client.name)

1764

1314

if self.server.use_dbus:

1765

1315

# Emit D-Bus signal

1766

client.Rejected("Disabled")

1316

client.Rejected("Disabled")

1767

1317

return

1768

1318

1769

if client.approved or not client.approval_delay:

1319

if client._approved or not client.approval_delay:

1770

1320

#We are approved or approval is disabled

1771

1321

break

1772

elif client.approved is None:

1322

elif client._approved is None:

1773

1323

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

1774

1324

client.name)

1775

1325

if self.server.use_dbus:

1776

1326

# Emit D-Bus signal

1777

1327

client.NeedApproval(

1778

client.approval_delay.total_seconds()

1779

* 1000, client.approved_by_default)

1328

client.approval_delay_milliseconds(),

1329

client.approved_by_default)

1780

1330

else:

1781

1331

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

1782

1332

client.name)

1786

1336

return

1787

1337

1788

1338

#wait until timeout or approved

1339

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

1789

1340

time = datetime.datetime.now()

1790

1341

client.changedstate.acquire()

1791

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

1342

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

1792

1343

client.changedstate.release()

1793

1344

time2 = datetime.datetime.now()

1794

1345

if (time2 - time) >= delay:

1810

1361

try:

1811

1362

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

1812

1363

except gnutls.errors.GNUTLSError as error:

1813

logger.warning("gnutls send failed",

1814

exc_info=error)

1364

logger.warning("gnutls send failed")

1815

1365

return

1816

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

1817

len(client.secret) - (sent_size

1818

+ sent))

1366

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

1367

sent, len(client.secret)

1368

- (sent_size + sent))

1819

1369

sent_size += sent

1820

1370

1821

1371

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

1822

# bump the timeout using extended_timeout

1823

client.bump_timeout(client.extended_timeout)

1372

# bump the timeout as if seen

1373

client.checked_ok(client.extended_timeout)

1824

1374

if self.server.use_dbus:

1825

1375

# Emit D-Bus signal

1826

1376

client.GotSecret()

1831

1381

try:

1832

1382

session.bye()

1833

1383

except gnutls.errors.GNUTLSError as error:

1834

logger.warning("GnuTLS bye failed",

1835

exc_info=error)

1384

logger.warning("GnuTLS bye failed")

1836

1385

1837

1386

@staticmethod

1838

1387

def peer_certificate(session):

1839

1388

"Return the peer's OpenPGP certificate as a bytestring"

1840

1389

# If not an OpenPGP certificate...

1841

if (gnutls.library.functions.gnutls_certificate_type_get(

1842

session._c_object)

1390

if (gnutls.library.functions

1391

.gnutls_certificate_type_get(session._c_object)

1843

1392

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1844

1393

# ...do the normal thing

1845

1394

return session.peer_certificate

1859

1408

def fingerprint(openpgp):

1860

1409

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1861

1410

# New GnuTLS "datum" with the OpenPGP public key

1862

datum = gnutls.library.types.gnutls_datum_t(

1863

ctypes.cast(ctypes.c_char_p(openpgp),

1864

ctypes.POINTER(ctypes.c_ubyte)),

1865

ctypes.c_uint(len(openpgp)))

1411

datum = (gnutls.library.types

1412

.gnutls_datum_t(ctypes.cast(ctypes.c_char_p(openpgp),

1413

ctypes.POINTER

1414

(ctypes.c_ubyte)),

1415

ctypes.c_uint(len(openpgp))))

1866

1416

# New empty GnuTLS certificate

1867

1417

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1868

gnutls.library.functions.gnutls_openpgp_crt_init(

1869

ctypes.byref(crt))

1418

(gnutls.library.functions

1419

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

1870

1420

# Import the OpenPGP public key into the certificate

1871

gnutls.library.functions.gnutls_openpgp_crt_import(

1872

crt, ctypes.byref(datum),

1873

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

1421

(gnutls.library.functions

1422

.gnutls_openpgp_crt_import(crt, ctypes.byref(datum),

1423

gnutls.library.constants

1424

.GNUTLS_OPENPGP_FMT_RAW))

1874

1425

# Verify the self signature in the key

1875

1426

crtverify = ctypes.c_uint()

1876

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1877

crt, 0, ctypes.byref(crtverify))

1427

(gnutls.library.functions

1428

.gnutls_openpgp_crt_verify_self(crt, 0,

1429

ctypes.byref(crtverify)))

1878

1430

if crtverify.value != 0:

1879

1431

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1880

raise gnutls.errors.CertificateSecurityError(

1881

"Verify failed")

1432

raise (gnutls.errors.CertificateSecurityError

1433

("Verify failed"))

1882

1434

# New buffer for the fingerprint

1883

1435

buf = ctypes.create_string_buffer(20)

1884

1436

buf_len = ctypes.c_size_t()

1885

1437

# Get the fingerprint from the certificate into the buffer

1886

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1887

crt, ctypes.byref(buf), ctypes.byref(buf_len))

1438

(gnutls.library.functions

1439

.gnutls_openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),

1440

ctypes.byref(buf_len)))

1888

1441

# Deinit the certificate

1889

1442

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1890

1443

# Convert the buffer to a Python bytestring

1891

1444

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

1892

1445

# Convert the bytestring to hexadecimal notation

1893

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

1446

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

1894

1447

return hex_fpr

1895

1448

1896

1449

1897

1450

class MultiprocessingMixIn(object):

1898

1451

"""Like socketserver.ThreadingMixIn, but with multiprocessing"""

1899

1900

1452

def sub_process_main(self, request, address):

1901

1453

try:

1902

1454

self.finish_request(request, address)

1903

except Exception:

1455

except:

1904

1456

self.handle_error(request, address)

1905

1457

self.close_request(request)

1906

1458

1907

1459

def process_request(self, request, address):

1908

1460

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

1909

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

1910

args = (request, address))

1911

proc.start()

1912

return proc

1461

multiprocessing.Process(target = self.sub_process_main,

1462

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

1913

1463

1914

1464

1915

1465

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1916

1466

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

1917

1918

1467

def process_request(self, request, client_address):

1919

1468

"""Overrides and wraps the original process_request().

1920

1469

1922

1471

"""

1923

1472

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1924

1473

1925

proc = MultiprocessingMixIn.process_request(self, request,

1926

client_address)

1474

super(MultiprocessingMixInWithPipe,

1475

self).process_request(request, client_address)

1927

1476

self.child_pipe.close()

1928

self.add_pipe(parent_pipe, proc)

1477

self.add_pipe(parent_pipe)

1929

1478

1930

def add_pipe(self, parent_pipe, proc):

1479

def add_pipe(self, parent_pipe):

1931

1480

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

1932

raise NotImplementedError()

1481

raise NotImplementedError

1933

1482

1934

1483

1935

1484

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1941

1490

interface: None or a network interface name (string)

1942

1491

use_ipv6: Boolean; to use IPv6 or not

1943

1492

"""

1944

1945

1493

def __init__(self, server_address, RequestHandlerClass,

1946

interface=None,

1947

use_ipv6=True,

1948

socketfd=None):

1949

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

1950

creating a new one with socket.socket().

1951

"""

1494

interface=None, use_ipv6=True):

1952

1495

self.interface = interface

1953

1496

if use_ipv6:

1954

1497

self.address_family = socket.AF_INET6

1955

if socketfd is not None:

1956

# Save the file descriptor

1957

self.socketfd = socketfd

1958

# Save the original socket.socket() function

1959

self.socket_socket = socket.socket

1960

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

1961

#

1962

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

1963

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

1964

# patching socket.socket.)

1965

#

1966

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

1967

@functools.wraps(socket.socket)

1968

def socket_wrapper(*args, **kwargs):

1969

# Restore original function so subsequent calls are

1970

# not affected.

1971

socket.socket = self.socket_socket

1972

del self.socket_socket

1973

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

1974

# saved file descriptor.

1975

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

1976

# Replace socket.socket() function with wrapper

1977

socket.socket = socket_wrapper

1978

# The socketserver.TCPServer.__init__ will call

1979

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

1980

# socket_wrapper(), if socketfd was set.

1981

1498

socketserver.TCPServer.__init__(self, server_address,

1982

1499

RequestHandlerClass)

1983

1984

1500

def server_bind(self):

1985

1501

"""This overrides the normal server_bind() function

1986

1502

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

1992

1508

self.interface)

1993

1509

else:

1994

1510

try:

1995

self.socket.setsockopt(

1996

socket.SOL_SOCKET, SO_BINDTODEVICE,

1997

(self.interface + "\0").encode("utf-8"))

1511

self.socket.setsockopt(socket.SOL_SOCKET,

1512

SO_BINDTODEVICE,

1513

str(self.interface

1514

+ '\0'))

1998

1515

except socket.error as error:

1999

if error.errno == errno.EPERM:

2000

logger.error("No permission to bind to"

2001

" interface %s", self.interface)

2002

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:

2003

1521

logger.error("SO_BINDTODEVICE not available;"

2004

1522

" cannot bind to interface %s",

2005

1523

self.interface)

2006

elif error.errno == errno.ENODEV:

2007

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

2008

" cannot bind", self.interface)

2009

1524

else:

2010

1525

raise

2011

1526

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

2014

1529

if self.address_family == socket.AF_INET6:

2015

1530

any_address = "::" # in6addr_any

2016

1531

else:

2017

any_address = "0.0.0.0" # INADDR_ANY

1532

any_address = socket.INADDR_ANY

2018

1533

self.server_address = (any_address,

2019

1534

self.server_address[1])

2020

1535

elif not self.server_address[1]:

2021

self.server_address = (self.server_address[0], 0)

1536

self.server_address = (self.server_address[0],

1537

0)

2022

1538

# if self.interface:

2023

1539

# self.server_address = (self.server_address[0],

2024

1540

# 0, # port

2038

1554

2039

1555

Assumes a gobject.MainLoop event loop.

2040

1556

"""

2041

2042

1557

def __init__(self, server_address, RequestHandlerClass,

2043

interface=None,

2044

use_ipv6=True,

2045

clients=None,

2046

gnutls_priority=None,

2047

use_dbus=True,

2048

socketfd=None):

1558

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

1559

gnutls_priority=None, use_dbus=True):

2049

1560

self.enabled = False

2050

1561

self.clients = clients

2051

1562

if self.clients is None:

2052

self.clients = {}

1563

self.clients = set()

2053

1564

self.use_dbus = use_dbus

2054

1565

self.gnutls_priority = gnutls_priority

2055

1566

IPv6_TCPServer.__init__(self, server_address,

2056

1567

RequestHandlerClass,

2057

1568

interface = interface,

2058

use_ipv6 = use_ipv6,

2059

socketfd = socketfd)

2060

1569

use_ipv6 = use_ipv6)

2061

1570

def server_activate(self):

2062

1571

if self.enabled:

2063

1572

return socketserver.TCPServer.server_activate(self)

2064

2065

1573

def enable(self):

2066

1574

self.enabled = True

2067

2068

def add_pipe(self, parent_pipe, proc):

1575

def add_pipe(self, parent_pipe):

2069

1576

# Call "handle_ipc" for both data and EOF events

2070

gobject.io_add_watch(

2071

parent_pipe.fileno(),

2072

gobject.IO_IN | gobject.IO_HUP,

2073

functools.partial(self.handle_ipc,

2074

parent_pipe = parent_pipe,

2075

proc = proc))

2076

2077

def handle_ipc(self, source, condition,

2078

parent_pipe=None,

2079

proc = None,

1577

gobject.io_add_watch(parent_pipe.fileno(),

1578

gobject.IO_IN | gobject.IO_HUP,

1579

functools.partial(self.handle_ipc,

1580

parent_pipe = parent_pipe))

1581

1582

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

2080

1583

client_object=None):

2081

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

2082

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

2083

# Wait for other process to exit

2084

proc.join()

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):

2085

1600

return False

2086

1601

2087

1602

# Read a request from the child

2092

1607

fpr = request[1]

2093

1608

address = request[2]

2094

1609

2095

for c in self.clients.itervalues():

1610

for c in self.clients:

2096

1611

if c.fingerprint == fpr:

2097

1612

client = c

2098

1613

break

2101

1616

"dress: %s", fpr, address)

2102

1617

if self.use_dbus:

2103

1618

# Emit D-Bus signal

2104

mandos_dbus_service.ClientNotFound(fpr,

2105

address[0])

1619

mandos_dbus_service.ClientNotFound(fpr, address[0])

2106

1620

parent_pipe.send(False)

2107

1621

return False

2108

1622

2109

gobject.io_add_watch(

2110

parent_pipe.fileno(),

2111

gobject.IO_IN | gobject.IO_HUP,

2112

functools.partial(self.handle_ipc,

2113

parent_pipe = parent_pipe,

2114

proc = proc,

2115

client_object = client))

1623

gobject.io_add_watch(parent_pipe.fileno(),

1624

gobject.IO_IN | gobject.IO_HUP,

1625

functools.partial(self.handle_ipc,

1626

parent_pipe = parent_pipe,

1627

client_object = client))

2116

1628

parent_pipe.send(True)

2117

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

2118

# same fileno

1629

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

2119

1630

return False

2120

1631

if command == 'funcall':

2121

1632

funcname = request[1]

2122

1633

args = request[2]

2123

1634

kwargs = request[3]

2124

1635

2125

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

2126

funcname)(*args,

2127

**kwargs)))

1636

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

2128

1637

2129

1638

if command == 'getattr':

2130

1639

attrname = request[1]

2131

1640

if callable(client_object.__getattribute__(attrname)):

2132

parent_pipe.send(('function', ))

1641

parent_pipe.send(('function',))

2133

1642

else:

2134

parent_pipe.send((

2135

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

1643

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

2136

1644

2137

1645

if command == 'setattr':

2138

1646

attrname = request[1]

2142

1650

return True

2143

1651

2144

1652

2145

def rfc3339_duration_to_delta(duration):

2146

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

2147

2148

>>> rfc3339_duration_to_delta("P7D")

2149

datetime.timedelta(7)

2150

>>> rfc3339_duration_to_delta("PT60S")

2151

datetime.timedelta(0, 60)

2152

>>> rfc3339_duration_to_delta("PT60M")

2153

datetime.timedelta(0, 3600)

2154

>>> rfc3339_duration_to_delta("PT24H")

2155

datetime.timedelta(1)

2156

>>> rfc3339_duration_to_delta("P1W")

2157

datetime.timedelta(7)

2158

>>> rfc3339_duration_to_delta("PT5M30S")

2159

datetime.timedelta(0, 330)

2160

>>> rfc3339_duration_to_delta("P1DT3M20S")

2161

datetime.timedelta(1, 200)

2162

"""

2163

2164

# Parsing an RFC 3339 duration with regular expressions is not

2165

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

2166

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

2167

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

2168

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

2169

# avoid excessive use of external libraries.

2170

2171

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

2172

Token = collections.namedtuple("Token",

2173

("regexp", # To match token; if

2174

# "value" is not None,

2175

# must have a "group"

2176

# containing digits

2177

"value", # datetime.timedelta or

2178

# None

2179

"followers")) # Tokens valid after

2180

# this token

2181

Token = collections.namedtuple("Token", (

2182

"regexp", # To match token; if "value" is not None, must have

2183

# a "group" containing digits

2184

"value", # datetime.timedelta or None

2185

"followers")) # Tokens valid after this token

2186

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

2187

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

2188

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

2189

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

2190

datetime.timedelta(seconds=1),

2191

frozenset((token_end, )))

2192

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

2193

datetime.timedelta(minutes=1),

2194

frozenset((token_second, token_end)))

2195

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

2196

datetime.timedelta(hours=1),

2197

frozenset((token_minute, token_end)))

2198

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

2199

None,

2200

frozenset((token_hour, token_minute,

2201

token_second)))

2202

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

2203

datetime.timedelta(days=1),

2204

frozenset((token_time, token_end)))

2205

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

2206

datetime.timedelta(weeks=4),

2207

frozenset((token_day, token_end)))

2208

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

2209

datetime.timedelta(weeks=52),

2210

frozenset((token_month, token_end)))

2211

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

2212

datetime.timedelta(weeks=1),

2213

frozenset((token_end, )))

2214

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

2215

frozenset((token_year, token_month,

2216

token_day, token_time,

2217

token_week)))

2218

# Define starting values

2219

value = datetime.timedelta() # Value so far

2220

found_token = None

2221

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

2222

s = duration # String left to parse

2223

# Loop until end token is found

2224

while found_token is not token_end:

2225

# Search for any currently valid tokens

2226

for token in followers:

2227

match = token.regexp.match(s)

2228

if match is not None:

2229

# Token found

2230

if token.value is not None:

2231

# Value found, parse digits

2232

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

2233

# Add to value so far

2234

value += factor * token.value

2235

# Strip token from string

2236

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

2237

# Go to found token

2238

found_token = token

2239

# Set valid next tokens

2240

followers = found_token.followers

2241

break

2242

else:

2243

# No currently valid tokens were found

2244

raise ValueError("Invalid RFC 3339 duration")

2245

# End token found

2246

return value

2247

2248

2249

1653

def string_to_delta(interval):

2250

1654

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

2251

1655

2262

1666

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

2263

1667

datetime.timedelta(0, 330)

2264

1668

"""

2265

2266

try:

2267

return rfc3339_duration_to_delta(interval)

2268

except ValueError:

2269

pass

2270

2271

1669

timevalue = datetime.timedelta(0)

2272

1670

for s in interval.split():

2273

1671

try:

2274

suffix = s[-1]

1672

suffix = unicode(s[-1])

2275

1673

value = int(s[:-1])

2276

1674

if suffix == "d":

2277

1675

delta = datetime.timedelta(value)

2284

1682

elif suffix == "w":

2285

1683

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

2286

1684

else:

2287

raise ValueError("Unknown suffix {!r}".format(suffix))

2288

except IndexError as e:

1685

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

1686

except (ValueError, IndexError) as e:

2289

1687

raise ValueError(*(e.args))

2290

1688

timevalue += delta

2291

1689

return timevalue

2292

1690

2293

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

2294

1716

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

2295

1717

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

2296

1718

2304

1726

sys.exit()

2305

1727

if not noclose:

2306

1728

# Close all standard open file descriptors

2307

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

1729

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

2308

1730

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

2309

1731

raise OSError(errno.ENODEV,

2310

"{} not a character device"

2311

.format(os.devnull))

1732

"%s not a character device"

1733

% os.path.devnull)

2312

1734

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

2313

1735

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

2314

1736

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

2323

1745

2324

1746

parser = argparse.ArgumentParser()

2325

1747

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

2326

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

1748

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

2327

1749

help="show version number and exit")

2328

1750

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

2329

1751

help="Bind to interface IF")

2335

1757

help="Run self-test")

2336

1758

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

2337

1759

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

2338

" to terminal", default=None)

1760

" to terminal")

2339

1761

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

2340

1762

help="Debug level for stdout output")

2341

1763

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

2348

1770

" files")

2349

1771

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

2350

1772

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

2351

" system bus interface", default=None)

1773

" system bus interface")

2352

1774

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

2353

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

2354

default=None)

2355

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

2356

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

2357

" state", default=None)

2358

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

2359

help="Specify a file descriptor to a network"

2360

" socket to use instead of creating one")

2361

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

2362

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

2363

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

2364

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

2365

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

2366

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

2367

default=None)

2368

1775

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

2369

1776

options = parser.parse_args()

2370

1777

2371

1778

if options.check:

2372

1779

import doctest

2373

fail_count, test_count = doctest.testmod()

2374

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

1780

doctest.testmod()

1781

sys.exit()

2375

1782

2376

1783

# Default values for config file for server-global settings

2377

1784

server_defaults = { "interface": "",

2379

1786

"port": "",

2380

1787

"debug": "False",

2381

1788

"priority":

2382

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

2383

":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",

1789

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

2384

1790

"servicename": "Mandos",

2385

1791

"use_dbus": "True",

2386

1792

"use_ipv6": "True",

2387

1793

"debuglevel": "",

2388

"restore": "True",

2389

"socket": "",

2390

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

2391

"foreground": "False",

2392

"zeroconf": "True",

2393

}

1794

}

2394

1795

2395

1796

# Parse config file for server-global settings

2396

1797

server_config = configparser.SafeConfigParser(server_defaults)

2397

1798

del server_defaults

2398

server_config.read(os.path.join(options.configdir, "mandos.conf"))

1799

server_config.read(os.path.join(options.configdir,

1800

"mandos.conf"))

2399

1801

# Convert the SafeConfigParser object to a dict

2400

1802

server_settings = server_config.defaults()

2401

1803

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

2402

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

1804

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

2403

1805

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

2404

1806

option)

2405

1807

if server_settings["port"]:

2406

1808

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

2407

1809

"port")

2408

if server_settings["socket"]:

2409

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

2410

"socket")

2411

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

2412

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

2413

# happen with a supplied network socket.

2414

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

2415

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

2416

["socket"])

2417

1810

del server_config

2418

1811

2419

1812

# Override the settings from the config file with command line

2420

1813

# options, if set.

2421

1814

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

2422

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

2423

"use_ipv6", "debuglevel", "restore", "statedir",

2424

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

1815

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

1816

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

2425

1817

value = getattr(options, option)

2426

1818

if value is not None:

2427

1819

server_settings[option] = value

2428

1820

del options

2429

1821

# Force all strings to be unicode

2430

1822

for option in server_settings.keys():

2431

if isinstance(server_settings[option], bytes):

2432

server_settings[option] = (server_settings[option]

2433

.decode("utf-8"))

2434

# Force all boolean options to be boolean

2435

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

2436

"foreground", "zeroconf"):

2437

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

2438

# Debug implies foreground

2439

if server_settings["debug"]:

2440

server_settings["foreground"] = True

1823

if type(server_settings[option]) is str:

1824

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

2441

1825

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

2442

1826

2443

1827

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

2444

1828

2445

if (not server_settings["zeroconf"]

2446

and not (server_settings["port"]

2447

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

2448

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

2449

2450

1829

# For convenience

2451

1830

debug = server_settings["debug"]

2452

1831

debuglevel = server_settings["debuglevel"]

2453

1832

use_dbus = server_settings["use_dbus"]

2454

1833

use_ipv6 = server_settings["use_ipv6"]

2455

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

2456

stored_state_file)

2457

foreground = server_settings["foreground"]

2458

zeroconf = server_settings["zeroconf"]

2459

2460

if debug:

2461

initlogger(debug, logging.DEBUG)

2462

else:

2463

if not debuglevel:

2464

initlogger(debug)

2465

else:

2466

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

2467

initlogger(debug, level)

2468

1834

2469

1835

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

2470

syslogger.setFormatter(

2471

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

2472

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

2473

server_settings["servicename"])))

1836

syslogger.setFormatter(logging.Formatter

1837

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

1838

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

1839

% server_settings["servicename"]))

2474

1840

2475

1841

# Parse config file with clients

2476

client_config = configparser.SafeConfigParser(Client

2477

.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)

2478

1851

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

2479

1852

"clients.conf"))

2480

1853

2481

1854

global mandos_dbus_service

2482

1855

mandos_dbus_service = None

2483

1856

2484

socketfd = None

2485

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

2486

socketfd = server_settings["socket"]

2487

tcp_server = MandosServer(

2488

(server_settings["address"], server_settings["port"]),

2489

ClientHandler,

2490

interface=(server_settings["interface"] or None),

2491

use_ipv6=use_ipv6,

2492

gnutls_priority=server_settings["priority"],

2493

use_dbus=use_dbus,

2494

socketfd=socketfd)

2495

if not foreground:

2496

pidfilename = "/run/mandos.pid"

2497

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

2498

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

2499

pidfile = None

1857

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

1858

server_settings["port"]),

1859

ClientHandler,

1860

interface=(server_settings["interface"]

1861

or None),

1862

use_ipv6=use_ipv6,

1863

gnutls_priority=

1864

server_settings["priority"],

1865

use_dbus=use_dbus)

1866

if not debug:

1867

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

2500

1868

try:

2501

1869

pidfile = open(pidfilename, "w")

2502

except IOError as e:

2503

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

2504

exc_info=e)

1870

except IOError:

1871

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

2505

1872

2506

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:

2507

1877

try:

2508

uid = pwd.getpwnam(name).pw_uid

2509

gid = pwd.getpwnam(name).pw_gid

2510

break

1878

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

1879

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

2511

1880

except KeyError:

2512

continue

2513

else:

2514

uid = 65534

2515

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

2516

1887

try:

2517

1888

os.setgid(gid)

2518

1889

os.setuid(uid)

2519

1890

except OSError as error:

2520

if error.errno != errno.EPERM:

2521

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)

2522

1901

2523

1902

if debug:

2524

1903

# Enable all possible GnuTLS debugging

2531

1910

def debug_gnutls(level, string):

2532

1911

logger.debug("GnuTLS: %s", string[:-1])

2533

1912

2534

gnutls.library.functions.gnutls_global_set_log_function(

2535

debug_gnutls)

1913

(gnutls.library.functions

1914

.gnutls_global_set_log_function(debug_gnutls))

2536

1915

2537

1916

# Redirect stdin so all checkers get /dev/null

2538

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

1917

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

2539

1918

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

2540

1919

if null > 2:

2541

1920

os.close(null)

1921

else:

1922

# No console logging

1923

logger.removeHandler(console)

2542

1924

2543

1925

# Need to fork before connecting to D-Bus

2544

if not foreground:

1926

if not debug:

2545

1927

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

2546

1928

daemon()

2547

1929

2548

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

2549

# need to inform gobject that threads will be used.

2550

gobject.threads_init()

2551

2552

1930

global main_loop

2553

1931

# From the Avahi example code

2554

DBusGMainLoop(set_as_default=True)

1932

DBusGMainLoop(set_as_default=True )

2555

1933

main_loop = gobject.MainLoop()

2556

1934

bus = dbus.SystemBus()

2557

1935

# End of Avahi example code

2558

1936

if use_dbus:

2559

1937

try:

2560

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

2561

bus,

2562

do_not_queue=True)

2563

old_bus_name = dbus.service.BusName(

2564

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

2565

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)

2566

1942

except dbus.exceptions.NameExistsException as e:

2567

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

1943

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

2568

1944

use_dbus = False

2569

1945

server_settings["use_dbus"] = False

2570

1946

tcp_server.use_dbus = False

2571

if zeroconf:

2572

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2573

service = AvahiServiceToSyslog(

2574

name = server_settings["servicename"],

2575

servicetype = "_mandos._tcp",

2576

protocol = protocol,

2577

bus = bus)

2578

if server_settings["interface"]:

2579

service.interface = if_nametoindex(

2580

server_settings["interface"].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"])))

2581

1954

2582

1955

global multiprocessing_manager

2583

1956

multiprocessing_manager = multiprocessing.Manager()

2584

1957

2585

1958

client_class = Client

2586

1959

if use_dbus:

2587

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

2588

2589

client_settings = Client.config_parser(client_config)

2590

old_client_settings = {}

2591

clients_data = {}

2592

2593

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

2594

global wnull

2595

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

2596

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

2597

# mode

2598

if debug or not foreground:

2599

wnull.close()

2600

2601

# Get client data and settings from last running state.

2602

if server_settings["restore"]:

2603

try:

2604

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

2605

clients_data, old_client_settings = pickle.load(

2606

stored_state)

2607

os.remove(stored_state_path)

2608

except IOError as e:

2609

if e.errno == errno.ENOENT:

2610

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

2611

" {}".format(os.strerror(e.errno)))

2612

else:

2613

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

2614

exc_info=e)

2615

raise

2616

except EOFError as e:

2617

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

2618

"EOFError:",

2619

exc_info=e)

2620

2621

with PGPEngine() as pgp:

2622

for client_name, client in clients_data.items():

2623

# Skip removed clients

2624

if client_name not in client_settings:

2625

continue

2626

2627

# Decide which value to use after restoring saved state.

2628

# We have three different values: Old config file,

2629

# new config file, and saved state.

2630

# New config value takes precedence if it differs from old

2631

# config value, otherwise use saved state.

2632

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

2633

try:

2634

# For each value in new config, check if it

2635

# differs from the old config value (Except for

2636

# the "secret" attribute)

2637

if (name != "secret"

2638

and (value !=

2639

old_client_settings[client_name][name])):

2640

client[name] = value

2641

except KeyError:

2642

pass

2643

2644

# Clients who has passed its expire date can still be

2645

# enabled if its last checker was successful. A Client

2646

# whose checker succeeded before we stored its state is

2647

# assumed to have successfully run all checkers during

2648

# downtime.

2649

if client["enabled"]:

2650

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

2651

if not client["last_checked_ok"]:

2652

logger.warning(

2653

"disabling client {} - Client never "

2654

"performed a successful checker".format(

2655

client_name))

2656

client["enabled"] = False

2657

elif client["last_checker_status"] != 0:

2658

logger.warning(

2659

"disabling client {} - Client last"

2660

" checker failed with error code"

2661

" {}".format(

2662

client_name,

2663

client["last_checker_status"]))

2664

client["enabled"] = False

2665

else:

2666

client["expires"] = (

2667

datetime.datetime.utcnow()

2668

+ client["timeout"])

2669

logger.debug("Last checker succeeded,"

2670

" keeping {} enabled".format(

2671

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):

2672

1968

try:

2673

client["secret"] = pgp.decrypt(

2674

client["encrypted_secret"],

2675

client_settings[client_name]["secret"])

2676

except PGPError:

2677

# If decryption fails, we use secret from new settings

2678

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

2679

client_name))

2680

client["secret"] = (client_settings[client_name]

2681

["secret"])

2682

2683

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

2684

for client_name in (set(old_client_settings)

2685

- set(client_settings)):

2686

del clients_data[client_name]

2687

for client_name in (set(client_settings)

2688

- set(old_client_settings)):

2689

clients_data[client_name] = client_settings[client_name]

2690

2691

# Create all client objects

2692

for client_name, client in clients_data.items():

2693

tcp_server.clients[client_name] = client_class(

2694

name = client_name,

2695

settings = client,

2696

server_settings = server_settings)

2697

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()))

2698

1978

if not tcp_server.clients:

2699

1979

logger.warning("No clients defined")

2700

2701

if not foreground:

2702

if pidfile is not None:

2703

try:

2704

with pidfile:

2705

pid = os.getpid()

2706

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

2707

except IOError:

2708

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

2709

pidfilename, pid)

2710

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

2711

1993

del pidfilename

1994

1995

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

2712

1996

2713

1997

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

2714

1998

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

2715

1999

2716

2000

if use_dbus:

2717

2718

@alternate_dbus_interfaces(

2719

{ "se.recompile.Mandos": "se.bsnet.fukt.Mandos" })

2720

class MandosDBusService(DBusObjectWithProperties):

2001

class MandosDBusService(dbus.service.Object):

2721

2002

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

2722

2723

2003

def __init__(self):

2724

2004

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

2725

2726

_interface = "se.recompile.Mandos"

2727

2728

@dbus_interface_annotations(_interface)

2729

def _foo(self):

2730

return {

2731

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

2732

"false" }

2005

_interface = "se.bsnet.fukt.Mandos"

2733

2006

2734

2007

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

2735

2008

def ClientAdded(self, objpath):

2749

2022

@dbus.service.method(_interface, out_signature="ao")

2750

2023

def GetAllClients(self):

2751

2024

"D-Bus method"

2752

return dbus.Array(c.dbus_object_path for c in

2753

tcp_server.clients.itervalues())

2025

return dbus.Array(c.dbus_object_path

2026

for c in tcp_server.clients)

2754

2027

2755

2028

@dbus.service.method(_interface,

2756

2029

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

2757

2030

def GetAllClientsWithProperties(self):

2758

2031

"D-Bus method"

2759

2032

return dbus.Dictionary(

2760

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

2761

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

2033

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

2034

for c in tcp_server.clients),

2762

2035

signature="oa{sv}")

2763

2036

2764

2037

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

2765

2038

def RemoveClient(self, object_path):

2766

2039

"D-Bus method"

2767

for c in tcp_server.clients.itervalues():

2040

for c in tcp_server.clients:

2768

2041

if c.dbus_object_path == object_path:

2769

del tcp_server.clients[c.name]

2042

tcp_server.clients.remove(c)

2770

2043

c.remove_from_connection()

2771

2044

# Don't signal anything except ClientRemoved

2772

2045

c.disable(quiet=True)

2777

2050

2778

2051

del _interface

2779

2052

2780

mandos_dbus_service = MandosDBusService()

2053

class MandosDBusServiceTransitional(MandosDBusService):

2054

__metaclass__ = transitional_dbus_metaclass

2055

mandos_dbus_service = MandosDBusServiceTransitional()

2781

2056

2782

2057

def cleanup():

2783

2058

"Cleanup function; run on exit"

2784

if zeroconf:

2785

service.cleanup()

2786

2787

multiprocessing.active_children()

2788

wnull.close()

2789

if not (tcp_server.clients or client_settings):

2790

return

2791

2792

# Store client before exiting. Secrets are encrypted with key

2793

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

2794

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

2795

clients = {}

2796

with PGPEngine() as pgp:

2797

for client in tcp_server.clients.itervalues():

2798

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

2799

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

2800

key)

2801

client_dict = {}

2802

2803

# A list of attributes that can not be pickled

2804

# + secret.

2805

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

2806

"checker", "server_settings" }

2807

for name, typ in inspect.getmembers(dbus.service

2808

.Object):

2809

exclude.add(name)

2810

2811

client_dict["encrypted_secret"] = (client

2812

.encrypted_secret)

2813

for attr in client.client_structure:

2814

if attr not in exclude:

2815

client_dict[attr] = getattr(client, attr)

2816

2817

clients[client.name] = client_dict

2818

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

2819

2820

try:

2821

with tempfile.NamedTemporaryFile(

2822

mode='wb',

2823

suffix=".pickle",

2824

prefix='clients-',

2825

dir=os.path.dirname(stored_state_path),

2826

delete=False) as stored_state:

2827

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

2828

tempname = stored_state.name

2829

os.rename(tempname, stored_state_path)

2830

except (IOError, OSError) as e:

2831

if not debug:

2832

try:

2833

os.remove(tempname)

2834

except NameError:

2835

pass

2836

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

2837

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

2838

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

2839

else:

2840

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

2841

exc_info=e)

2842

raise

2843

2844

# Delete all clients, and settings from config

2059

service.cleanup()

2060

2845

2061

while tcp_server.clients:

2846

name, client = tcp_server.clients.popitem()

2062

client = tcp_server.clients.pop()

2847

2063

if use_dbus:

2848

2064

client.remove_from_connection()

2065

client.disable_hook = None

2849

2066

# Don't signal anything except ClientRemoved

2850

2067

client.disable(quiet=True)

2851

2068

if use_dbus:

2852

2069

# Emit D-Bus signal

2853

mandos_dbus_service.ClientRemoved(

2854

client.dbus_object_path, client.name)

2855

client_settings.clear()

2070

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2071

client.name)

2856

2072

2857

2073

atexit.register(cleanup)

2858

2074

2859

for client in tcp_server.clients.itervalues():

2075

for client in tcp_server.clients:

2860

2076

if use_dbus:

2861

2077

# Emit D-Bus signal

2862

2078

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2863

# Need to initiate checking of clients

2864

if client.enabled:

2865

client.init_checker()

2079

client.enable()

2866

2080

2867

2081

tcp_server.enable()

2868

2082

tcp_server.server_activate()

2869

2083

2870

2084

# Find out what port we got

2871

if zeroconf:

2872

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

2085

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

2873

2086

if use_ipv6:

2874

2087

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

2875

" flowinfo %d, scope_id %d",

2876

*tcp_server.socket.getsockname())

2088

" flowinfo %d, scope_id %d"

2089

% tcp_server.socket.getsockname())

2877

2090

else: # IPv4

2878

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

2879

*tcp_server.socket.getsockname())

2091

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

2092

% tcp_server.socket.getsockname())

2880

2093

2881

2094

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

2882

2095

2883

2096

try:

2884

if zeroconf:

2885

# From the Avahi example code

2886

try:

2887

service.activate()

2888

except dbus.exceptions.DBusException as error:

2889

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

2890

cleanup()

2891

sys.exit(1)

2892

# 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

2893

2105

2894

2106

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

2895

2107

lambda *args, **kwargs:

2899

2111

logger.debug("Starting main loop")

2900

2112

main_loop.run()

2901

2113

except AvahiError as error:

2902

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

2114

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

2903

2115

cleanup()

2904

2116

sys.exit(1)

2905

2117

except KeyboardInterrupt: