/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 codecs

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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:

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

402

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else:

403

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

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405

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def activate(self):

406

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

407

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if self.server is None:

411

261

follow_name_owner_changes=True),

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262

avahi.DBUS_INTERFACE_SERVER)

413

263

self.server.connect_to_signal("StateChanged",

414

self.server_state_changed)

264

self.server_state_changed)

415

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

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266

417

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class AvahiServiceToSyslog(AvahiService):

419

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

420

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

421

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

422

syslogger.setFormatter(logging.Formatter(

423

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

424

.format(self.name)))

425

return ret

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427

def call_pipe(connection, # : multiprocessing.Connection

428

func, *args, **kwargs):

429

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

430

431

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

432

return value on the provided multiprocessing.Connection.

433

"""

434

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

435

connection.close()

436

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

437

274

class Client(object):

438

275

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

439

276

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Attributes:

441

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

278

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

442

279

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

443

280

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

444

281

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

451

288

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

452

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checker_initiator_tag: a gobject event source tag, or None

453

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

454

client_structure: Object describing what attributes a client has

455

and is used for storing the client at exit

456

291

current_checker_command: string; current running checker_command

292

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

457

293

disable_initiator_tag: a gobject event source tag, or None

458

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enabled: bool()

459

295

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

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

463

299

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

464

300

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

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last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, -2 means no checker completed yet.

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last_checker_signal: The signal which killed the last checker, if

469

last_checker_status is -1

470

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

301

last_enabled: datetime.datetime(); (UTC)

471

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

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303

D-Bus identifiers

473

304

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

474

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

475

306

until this client is disabled

476

extended_timeout: extra long timeout when secret has been sent

307

extended_timeout: extra long timeout when password has been sent

477

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runtime_expansions: Allowed attributes for runtime expansion.

478

309

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

479

310

disabled, or None

480

server_settings: The server_settings dict from main()

481

311

"""

482

312

483

313

runtime_expansions = ("approval_delay", "approval_duration",

484

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

485

"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",

487

316

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

488

client_defaults = {

489

"timeout": "PT5M",

490

"extended_timeout": "PT15M",

491

"interval": "PT2M",

492

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

493

"host": "",

494

"approval_delay": "PT0S",

495

"approval_duration": "PT1S",

496

"approved_by_default": "True",

497

"enabled": "True",

498

}

499

500

@staticmethod

501

def config_parser(config):

502

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

503

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

504

with exceptions for any special settings as defined above.

505

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

506

value given the same arguments.

507

"""

508

settings = {}

509

for client_name in config.sections():

510

section = dict(config.items(client_name))

511

client = settings[client_name] = {}

512

513

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

514

# Reformat values from string types to Python types

515

client["approved_by_default"] = config.getboolean(

516

client_name, "approved_by_default")

517

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

518

"enabled")

519

520

# Uppercase and remove spaces from fingerprint for later

521

# comparison purposes with return value from the

522

# fingerprint() function

523

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

524

.replace(" ", ""))

525

if "secret" in section:

526

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

527

elif "secfile" in section:

528

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

529

(section["secfile"])),

530

"rb") as secfile:

531

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

532

else:

533

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

534

.format(section))

535

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

536

client["extended_timeout"] = string_to_delta(

537

section["extended_timeout"])

538

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

539

client["approval_delay"] = string_to_delta(

540

section["approval_delay"])

541

client["approval_duration"] = string_to_delta(

542

section["approval_duration"])

543

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

544

client["last_approval_request"] = None

545

client["last_checked_ok"] = None

546

client["last_checker_status"] = -2

547

548

return settings

549

550

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."""

551

337

self.name = name

552

if server_settings is None:

553

server_settings = {}

554

self.server_settings = server_settings

555

# adding all client settings

556

for setting, value in settings.items():

557

setattr(self, setting, value)

558

559

if self.enabled:

560

if not hasattr(self, "last_enabled"):

561

self.last_enabled = datetime.datetime.utcnow()

562

if not hasattr(self, "expires"):

563

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

564

+ self.timeout)

565

else:

566

self.last_enabled = None

567

self.expires = None

568

338

if config is None:

339

config = {}

569

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(" ", ""))

570

346

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

571

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

572

datetime.datetime.utcnow())

573

574

# 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

575

367

self.checker = None

576

368

self.checker_initiator_tag = None

577

369

self.disable_initiator_tag = None

370

self.expires = None

578

371

self.checker_callback_tag = None

372

self.checker_command = config["checker"]

579

373

self.current_checker_command = None

580

self.approved = None

374

self.last_connect = None

375

self._approved = None

376

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

377

True)

581

378

self.approvals_pending = 0

582

self.changedstate = multiprocessing_manager.Condition(

583

multiprocessing_manager.Lock())

584

self.client_structure = [attr

585

for attr in self.__dict__.iterkeys()

586

if not attr.startswith("_")]

587

self.client_structure.append("client_structure")

588

589

for name, t in inspect.getmembers(

590

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

591

if not name.startswith("_"):

592

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())

593

384

594

# Send notice to process children that client state has changed

595

385

def send_changedstate(self):

596

with self.changedstate:

597

self.changedstate.notify_all()

598

386

self.changedstate.acquire()

387

self.changedstate.notify_all()

388

self.changedstate.release()

389

599

390

def enable(self):

600

391

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

601

392

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

602

393

# Already enabled

603

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

604

402

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

403

self.disable_initiator_tag = (gobject.timeout_add

404

(self.timeout_milliseconds(),

405

self.disable))

605

406

self.enabled = True

606

407

self.last_enabled = datetime.datetime.utcnow()

607

self.init_checker()

608

self.send_changedstate()

408

# Also start a new checker *right now*.

409

self.start_checker()

609

410

610

411

def disable(self, quiet=True):

611

412

"""Disable this client."""

612

413

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

613

414

return False

614

415

if not quiet:

416

self.send_changedstate()

417

if not quiet:

615

418

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

616

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

419

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

617

420

gobject.source_remove(self.disable_initiator_tag)

618

421

self.disable_initiator_tag = None

619

422

self.expires = None

620

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

423

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

621

424

gobject.source_remove(self.checker_initiator_tag)

622

425

self.checker_initiator_tag = None

623

426

self.stop_checker()

427

if self.disable_hook:

428

self.disable_hook(self)

624

429

self.enabled = False

625

if not quiet:

626

self.send_changedstate()

627

430

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

628

431

return False

629

432

630

433

def __del__(self):

434

self.disable_hook = None

631

435

self.disable()

632

436

633

def init_checker(self):

634

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

635

# and every interval from then on.

636

if self.checker_initiator_tag is not None:

637

gobject.source_remove(self.checker_initiator_tag)

638

self.checker_initiator_tag = gobject.timeout_add(

639

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

640

self.start_checker)

641

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

642

if self.disable_initiator_tag is not None:

643

gobject.source_remove(self.disable_initiator_tag)

644

self.disable_initiator_tag = gobject.timeout_add(

645

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

646

# Also start a new checker *right now*.

647

self.start_checker()

648

649

def checker_callback(self, source, condition, connection,

650

command):

437

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

651

438

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

652

439

self.checker_callback_tag = None

653

440

self.checker = None

654

# Read return code from connection (see call_pipe)

655

returncode = connection.recv()

656

connection.close()

657

658

if returncode >= 0:

659

self.last_checker_status = returncode

660

self.last_checker_signal = None

661

if self.last_checker_status == 0:

441

if os.WIFEXITED(condition):

442

exitstatus = os.WEXITSTATUS(condition)

443

if exitstatus == 0:

662

444

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

663

445

vars(self))

664

446

self.checked_ok()

665

447

else:

666

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

448

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

449

vars(self))

667

450

else:

668

self.last_checker_status = -1

669

self.last_checker_signal = -returncode

670

451

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

671

452

vars(self))

672

return False

673

674

def checked_ok(self):

675

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

676

self.last_checked_ok = datetime.datetime.utcnow()

677

self.last_checker_status = 0

678

self.last_checker_signal = None

679

self.bump_timeout()

680

681

def bump_timeout(self, timeout=None):

682

"""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

"""

683

460

if timeout is None:

684

461

timeout = self.timeout

685

if self.disable_initiator_tag is not None:

686

gobject.source_remove(self.disable_initiator_tag)

687

self.disable_initiator_tag = None

688

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

689

self.disable_initiator_tag = gobject.timeout_add(

690

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

691

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))

692

468

693

469

def need_approval(self):

694

470

self.last_approval_request = datetime.datetime.utcnow()

699

475

If a checker already exists, leave it running and do

700

476

nothing."""

701

477

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

702

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

703

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

704

# would inevitably timeout, since no checker would get a

705

# 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

706

482

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

707

483

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

708

484

# should be.

709

485

710

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

711

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

712

self.checker.join()

713

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)

714

499

# Start a new checker if needed

715

500

if self.checker is None:

716

# Escape attributes for the shell

717

escaped_attrs = {

718

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

719

for attr in self.runtime_expansions }

720

501

try:

721

command = self.checker_command % escaped_attrs

722

except TypeError as error:

723

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

724

self.checker_command,

725

exc_info=error)

726

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

727

520

self.current_checker_command = command

728

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

729

self.name)

730

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

731

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

732

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

733

# always replaced by /dev/null.)

734

# The exception is when not debugging but nevertheless

735

# running in the foreground; use the previously

736

# created wnull.

737

popen_args = { "close_fds": True,

738

"shell": True,

739

"cwd": "/" }

740

if (not self.server_settings["debug"]

741

and self.server_settings["foreground"]):

742

popen_args.update({"stdout": wnull,

743

"stderr": wnull })

744

pipe = multiprocessing.Pipe(duplex = False)

745

self.checker = multiprocessing.Process(

746

target = call_pipe,

747

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

748

kwargs = popen_args)

749

self.checker.start()

750

self.checker_callback_tag = gobject.io_add_watch(

751

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

752

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)

753

544

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

754

545

return True

755

546

761

552

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

762

553

return

763

554

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

764

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

765

563

self.checker = None

766

564

767

565

768

def dbus_service_property(dbus_interface,

769

signature="v",

770

access="readwrite",

771

byte_arrays=False):

566

def dbus_service_property(dbus_interface, signature="v",

567

access="readwrite", byte_arrays=False):

772

568

"""Decorators for marking methods of a DBusObjectWithProperties to

773

569

become properties on the D-Bus.

774

570

783

579

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

784

580

if byte_arrays and signature != "ay":

785

581

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

786

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

787

582

" signature %r" % signature)

788

583

def decorator(func):

789

584

func._dbus_is_property = True

790

585

func._dbus_interface = dbus_interface

795

590

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

796

591

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

797

592

return func

798

799

return decorator

800

801

802

def dbus_interface_annotations(dbus_interface):

803

"""Decorator for marking functions returning interface annotations

804

805

Usage:

806

807

@dbus_interface_annotations("org.example.Interface")

808

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

809

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

810

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

811

"false"}

812

"""

813

814

def decorator(func):

815

func._dbus_is_interface = True

816

func._dbus_interface = dbus_interface

817

func._dbus_name = dbus_interface

818

return func

819

820

return decorator

821

822

823

def dbus_annotations(annotations):

824

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

825

Usage:

826

827

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

828

"org.freedesktop.DBus.Property."

829

"EmitsChangedSignal": "false"})

830

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

831

access="r")

832

def Property_dbus_property(self):

833

return dbus.Boolean(False)

834

"""

835

836

def decorator(func):

837

func._dbus_annotations = annotations

838

return func

839

840

593

return decorator

841

594

842

595

843

596

class DBusPropertyException(dbus.exceptions.DBusException):

844

597

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

845

598

"""

846

pass

599

def __unicode__(self):

600

return unicode(str(self))

847

601

848

602

849

603

class DBusPropertyAccessException(DBusPropertyException):

867

621

"""

868

622

869

623

@staticmethod

870

def _is_dbus_thing(thing):

871

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

872

873

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

874

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

875

"""

876

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

877

False)

624

def _is_dbus_property(obj):

625

return getattr(obj, "_dbus_is_property", False)

878

626

879

def _get_all_dbus_things(self, thing):

627

def _get_all_dbus_properties(self):

880

628

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

881

629

"""

882

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

883

athing.__get__(self))

630

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

884

631

for cls in self.__class__.__mro__

885

for name, athing in

886

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

632

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

887

633

888

634

def _get_dbus_property(self, interface_name, property_name):

889

635

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

890

636

property with the specified name and interface.

891

637

"""

892

for cls in self.__class__.__mro__:

893

for name, value in inspect.getmembers(

894

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

895

if (value._dbus_name == property_name

896

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:

897

641

return value.__get__(self)

898

642

899

643

# No such property

900

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

901

self.dbus_object_path, interface_name, property_name))

644

raise DBusPropertyNotFound(self.dbus_object_path + ":"

645

+ interface_name + "."

646

+ property_name)

647

902

648

903

@dbus.service.method(dbus.PROPERTIES_IFACE,

904

in_signature="ss",

649

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

905

650

out_signature="v")

906

651

def Get(self, interface_name, property_name):

907

652

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

925

670

# The byte_arrays option is not supported yet on

926

671

# signatures other than "ay".

927

672

if prop._dbus_signature != "ay":

928

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

929

"'ay' signature {!r}"

930

.format(prop._dbus_signature))

931

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

932

for byte in value))

673

raise ValueError

674

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

675

for byte in value))

933

676

prop(value)

934

677

935

@dbus.service.method(dbus.PROPERTIES_IFACE,

936

in_signature="s",

678

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

937

679

out_signature="a{sv}")

938

680

def GetAll(self, interface_name):

939

681

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

941

683

942

684

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

943

685

"""

944

properties = {}

945

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

686

all = {}

687

for name, prop in self._get_all_dbus_properties():

946

688

if (interface_name

947

689

and interface_name != prop._dbus_interface):

948

690

# Interface non-empty but did not match

952

694

continue

953

695

value = prop()

954

696

if not hasattr(value, "variant_level"):

955

properties[name] = value

697

all[name] = value

956

698

continue

957

properties[name] = type(value)(

958

value, variant_level = value.variant_level + 1)

959

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

960

961

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

962

def PropertiesChanged(self, interface_name, changed_properties,

963

invalidated_properties):

964

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

965

standard.

966

"""

967

pass

699

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

700

value.variant_level+1)

701

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

968

702

969

703

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

970

704

out_signature="s",

971

705

path_keyword='object_path',

972

706

connection_keyword='connection')

973

707

def Introspect(self, object_path, connection):

974

"""Overloading of standard D-Bus method.

975

976

Inserts property tags and interface annotation tags.

708

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

977

709

"""

978

710

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

979

711

connection)

980

712

try:

981

713

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

982

983

714

def make_tag(document, name, prop):

984

715

e = document.createElement("property")

985

716

e.setAttribute("name", name)

986

717

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

987

718

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

988

719

return e

989

990

720

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

991

# Add property tags

992

721

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

993

722

for name, prop

994

in self._get_all_dbus_things("property")

723

in self._get_all_dbus_properties()

995

724

if prop._dbus_interface

996

725

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

997

726

if_tag.appendChild(tag)

998

# Add annotation tags

999

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

1000

for tag in if_tag.getElementsByTagName(typ):

1001

annots = dict()

1002

for name, prop in (self.

1003

_get_all_dbus_things(typ)):

1004

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

1005

and prop._dbus_interface

1006

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

1007

annots.update(getattr(

1008

prop, "_dbus_annotations", {}))

1009

for name, value in annots.items():

1010

ann_tag = document.createElement(

1011

"annotation")

1012

ann_tag.setAttribute("name", name)

1013

ann_tag.setAttribute("value", value)

1014

tag.appendChild(ann_tag)

1015

# Add interface annotation tags

1016

for annotation, value in dict(

1017

itertools.chain.from_iterable(

1018

annotations().items()

1019

for name, annotations

1020

in self._get_all_dbus_things("interface")

1021

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

1022

)).items():

1023

ann_tag = document.createElement("annotation")

1024

ann_tag.setAttribute("name", annotation)

1025

ann_tag.setAttribute("value", value)

1026

if_tag.appendChild(ann_tag)

1027

727

# Add the names to the return values for the

1028

728

# "org.freedesktop.DBus.Properties" methods

1029

729

if (if_tag.getAttribute("name")

1044

744

except (AttributeError, xml.dom.DOMException,

1045

745

xml.parsers.expat.ExpatError) as error:

1046

746

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

1047

exc_info=error)

747

error)

1048

748

return xmlstring

1049

749

1050

750

1051

def datetime_to_dbus(dt, variant_level=0):

751

def datetime_to_dbus (dt, variant_level=0):

1052

752

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

1053

753

if dt is None:

1054

754

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

1055

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

1056

1057

1058

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1059

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

1060

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

1061

interface names according to the "alt_interface_names" mapping.

1062

Usage:

1063

1064

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

1065

"net.example.AlternateInterface"})

1066

class SampleDBusObject(dbus.service.Object):

1067

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

1068

def SampleDBusMethod():

1069

pass

1070

1071

The above "SampleDBusMethod" on "SampleDBusObject" will be

1072

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

1073

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

1074

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

1075

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

1076

1077

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

1078

(from DBusObjectWithProperties) and interfaces (from the

1079

dbus_interface_annotations decorator).

1080

"""

1081

1082

def wrapper(cls):

1083

for orig_interface_name, alt_interface_name in (

1084

alt_interface_names.items()):

1085

attr = {}

1086

interface_names = set()

1087

# Go though all attributes of the class

1088

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

1089

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

1090

# with the wrong interface name

1091

if (not hasattr(attribute, "_dbus_interface")

1092

or not attribute._dbus_interface.startswith(

1093

orig_interface_name)):

1094

continue

1095

# Create an alternate D-Bus interface name based on

1096

# the current name

1097

alt_interface = attribute._dbus_interface.replace(

1098

orig_interface_name, alt_interface_name)

1099

interface_names.add(alt_interface)

1100

# Is this a D-Bus signal?

1101

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

1102

if sys.version_info.major == 2:

1103

# Extract the original non-method undecorated

1104

# function by black magic

1105

nonmethod_func = (dict(

1106

zip(attribute.func_code.co_freevars,

1107

attribute.__closure__))

1108

["func"].cell_contents)

1109

else:

1110

nonmethod_func = attribute

1111

# Create a new, but exactly alike, function

1112

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

1113

# with the alternate D-Bus interface name

1114

if sys.version_info.major == 2:

1115

new_function = types.FunctionType(

1116

nonmethod_func.func_code,

1117

nonmethod_func.func_globals,

1118

nonmethod_func.func_name,

1119

nonmethod_func.func_defaults,

1120

nonmethod_func.func_closure)

1121

else:

1122

new_function = types.FunctionType(

1123

nonmethod_func.__code__,

1124

nonmethod_func.__globals__,

1125

nonmethod_func.__name__,

1126

nonmethod_func.__defaults__,

1127

nonmethod_func.__closure__)

1128

new_function = (dbus.service.signal(

1129

alt_interface,

1130

attribute._dbus_signature)(new_function))

1131

# Copy annotations, if any

1132

try:

1133

new_function._dbus_annotations = dict(

1134

attribute._dbus_annotations)

1135

except AttributeError:

1136

pass

1137

# Define a creator of a function to call both the

1138

# original and alternate functions, so both the

1139

# original and alternate signals gets sent when

1140

# the function is called

1141

def fixscope(func1, func2):

1142

"""This function is a scope container to pass

1143

func1 and func2 to the "call_both" function

1144

outside of its arguments"""

1145

1146

def call_both(*args, **kwargs):

1147

"""This function will emit two D-Bus

1148

signals by calling func1 and func2"""

1149

func1(*args, **kwargs)

1150

func2(*args, **kwargs)

1151

1152

return call_both

1153

# Create the "call_both" function and add it to

1154

# the class

1155

attr[attrname] = fixscope(attribute, new_function)

1156

# Is this a D-Bus method?

1157

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

1158

# Create a new, but exactly alike, function

1159

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

1160

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

1161

# to the class.

1162

attr[attrname] = (

1163

dbus.service.method(

1164

alt_interface,

1165

attribute._dbus_in_signature,

1166

attribute._dbus_out_signature)

1167

(types.FunctionType(attribute.func_code,

1168

attribute.func_globals,

1169

attribute.func_name,

1170

attribute.func_defaults,

1171

attribute.func_closure)))

1172

# Copy annotations, if any

1173

try:

1174

attr[attrname]._dbus_annotations = dict(

1175

attribute._dbus_annotations)

1176

except AttributeError:

1177

pass

1178

# Is this a D-Bus property?

1179

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

1180

# Create a new, but exactly alike, function

1181

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

1182

# property with the alternate D-Bus interface

1183

# name. Add it to the class.

1184

attr[attrname] = (dbus_service_property(

1185

alt_interface, attribute._dbus_signature,

1186

attribute._dbus_access,

1187

attribute._dbus_get_args_options

1188

["byte_arrays"])

1189

(types.FunctionType(

1190

attribute.func_code,

1191

attribute.func_globals,

1192

attribute.func_name,

1193

attribute.func_defaults,

1194

attribute.func_closure)))

1195

# Copy annotations, if any

1196

try:

1197

attr[attrname]._dbus_annotations = dict(

1198

attribute._dbus_annotations)

1199

except AttributeError:

1200

pass

1201

# Is this a D-Bus interface?

1202

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

1203

# Create a new, but exactly alike, function

1204

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

1205

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

1206

# to the class.

1207

attr[attrname] = (

1208

dbus_interface_annotations(alt_interface)

1209

(types.FunctionType(attribute.func_code,

1210

attribute.func_globals,

1211

attribute.func_name,

1212

attribute.func_defaults,

1213

attribute.func_closure)))

1214

if deprecate:

1215

# Deprecate all alternate interfaces

1216

iname="_AlternateDBusNames_interface_annotation{}"

1217

for interface_name in interface_names:

1218

1219

@dbus_interface_annotations(interface_name)

1220

def func(self):

1221

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

1222

"true" }

1223

# Find an unused name

1224

for aname in (iname.format(i)

1225

for i in itertools.count()):

1226

if aname not in attr:

1227

attr[aname] = func

1228

break

1229

if interface_names:

1230

# Replace the class with a new subclass of it with

1231

# methods, signals, etc. as created above.

1232

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

1233

(cls, ), attr)

1234

return cls

1235

1236

return wrapper

1237

1238

1239

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

1240

"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

1241

814

class ClientDBus(Client, DBusObjectWithProperties):

1242

815

"""A Client class using D-Bus

1243

816

1247

820

"""

1248

821

1249

822

runtime_expansions = (Client.runtime_expansions

1250

+ ("dbus_object_path", ))

1251

1252

_interface = "se.recompile.Mandos.Client"

823

+ ("dbus_object_path",))

1253

824

1254

825

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

1255

826

1256

827

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

828

self._approvals_pending = 0

1257

829

self.bus = bus

1258

830

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

1259

831

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

1260

832

# the D-Bus

1261

client_object_name = str(self.name).translate(

833

client_object_name = unicode(self.name).translate(

1262

834

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

1263

835

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

1264

self.dbus_object_path = dbus.ObjectPath(

1265

"/clients/" + client_object_name)

836

self.dbus_object_path = (dbus.ObjectPath

837

("/clients/" + client_object_name))

1266

838

DBusObjectWithProperties.__init__(self, self.bus,

1267

839

self.dbus_object_path)

1268

1269

def notifychangeproperty(transform_func, dbus_name,

1270

type_func=lambda x: x,

1271

variant_level=1,

1272

invalidate_only=False,

1273

_interface=_interface):

1274

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

1275

its changes to DBus.

1276

840

1277

transform_fun: Function that takes a value and a variant_level

1278

and transforms it to a D-Bus type.

1279

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

1280

849

type_func: Function that transform the value before sending it

1281

to the D-Bus. Default: no transform

1282

variant_level: D-Bus variant level. Default: 1

850

to DBus

851

variant_level: DBus variant level. default: 1

1283

852

"""

1284

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

1285

853

real_value = [None,]

1286

854

def setter(self, value):

855

old_value = real_value[0]

856

real_value[0] = value

1287

857

if hasattr(self, "dbus_object_path"):

1288

if (not hasattr(self, attrname) or

1289

type_func(getattr(self, attrname, None))

1290

!= type_func(value)):

1291

if invalidate_only:

1292

self.PropertiesChanged(

1293

_interface, dbus.Dictionary(),

1294

dbus.Array((dbus_name, )))

1295

else:

1296

dbus_value = transform_func(

1297

type_func(value),

1298

variant_level = variant_level)

1299

self.PropertyChanged(dbus.String(dbus_name),

1300

dbus_value)

1301

self.PropertiesChanged(

1302

_interface,

1303

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

1304

dbus_value }),

1305

dbus.Array())

1306

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)

1307

863

1308

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

864

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

865

1309

866

1310

867

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1311

868

approvals_pending = notifychangeproperty(dbus.Boolean,

1314

871

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

1315

872

last_enabled = notifychangeproperty(datetime_to_dbus,

1316

873

"LastEnabled")

1317

checker = notifychangeproperty(

1318

dbus.Boolean, "CheckerRunning",

1319

type_func = lambda checker: checker is not None)

874

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

875

type_func = lambda checker: checker is not None)

1320

876

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1321

877

"LastCheckedOK")

1322

last_checker_status = notifychangeproperty(dbus.Int16,

1323

"LastCheckerStatus")

1324

last_approval_request = notifychangeproperty(

1325

datetime_to_dbus, "LastApprovalRequest")

878

last_approval_request = notifychangeproperty(datetime_to_dbus,

879

"LastApprovalRequest")

1326

880

approved_by_default = notifychangeproperty(dbus.Boolean,

1327

881

"ApprovedByDefault")

1328

approval_delay = notifychangeproperty(

1329

dbus.UInt64, "ApprovalDelay",

1330

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

1331

approval_duration = notifychangeproperty(

1332

dbus.UInt64, "ApprovalDuration",

1333

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)

1334

886

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

1335

timeout = notifychangeproperty(

1336

dbus.UInt64, "Timeout",

1337

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

1338

extended_timeout = notifychangeproperty(

1339

dbus.UInt64, "ExtendedTimeout",

1340

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

1341

interval = notifychangeproperty(

1342

dbus.UInt64, "Interval",

1343

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)

1344

893

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

1345

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

1346

invalidate_only=True)

1347

894

1348

895

del notifychangeproperty

1349

896

1356

903

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

1357

904

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

1358

905

1359

def checker_callback(self, source, condition,

1360

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

1361

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

1362

connection, command, *args,

1363

**kwargs)

1364

exitstatus = self.last_checker_status

1365

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)

1366

912

# Emit D-Bus signal

1367

913

self.CheckerCompleted(dbus.Int16(exitstatus),

1368

dbus.Int64(0),

914

dbus.Int64(condition),

1369

915

dbus.String(command))

1370

916

else:

1371

917

# Emit D-Bus signal

1372

918

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

1373

dbus.Int64(

1374

self.last_checker_signal),

919

dbus.Int64(condition),

1375

920

dbus.String(command))

1376

return ret

921

922

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

923

*args, **kwargs)

1377

924

1378

925

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

1379

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

1380

931

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

1381

932

# Only if new checker process was started

1382

933

if (self.checker is not None

1386

937

return r

1387

938

1388

939

def _reset_approved(self):

1389

self.approved = None

940

self._approved = None

1390

941

return False

1391

942

1392

943

def approve(self, value=True):

1393

self.approved = value

1394

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

1395

* 1000), self._reset_approved)

1396

944

self.send_changedstate()

945

self._approved = value

946

gobject.timeout_add(_timedelta_to_milliseconds

947

(self.approval_duration),

948

self._reset_approved)

949

1397

950

1398

951

## D-Bus methods, signals & properties

1399

1400

## Interfaces

1401

952

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

953

1402

954

## Signals

1403

955

1404

956

# CheckerCompleted - signal

1414

966

pass

1415

967

1416

968

# PropertyChanged - signal

1417

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

1418

969

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

1419

970

def PropertyChanged(self, property, value):

1420

971

"D-Bus signal"

1484

1035

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

1485

1036

1486

1037

# ApprovedByDefault - property

1487

@dbus_service_property(_interface,

1488

signature="b",

1038

@dbus_service_property(_interface, signature="b",

1489

1039

access="readwrite")

1490

1040

def ApprovedByDefault_dbus_property(self, value=None):

1491

1041

if value is None: # get

1493

1043

self.approved_by_default = bool(value)

1494

1044

1495

1045

# ApprovalDelay - property

1496

@dbus_service_property(_interface,

1497

signature="t",

1046

@dbus_service_property(_interface, signature="t",

1498

1047

access="readwrite")

1499

1048

def ApprovalDelay_dbus_property(self, value=None):

1500

1049

if value is None: # get

1501

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

1502

* 1000)

1050

return dbus.UInt64(self.approval_delay_milliseconds())

1503

1051

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

1504

1052

1505

1053

# ApprovalDuration - property

1506

@dbus_service_property(_interface,

1507

signature="t",

1054

@dbus_service_property(_interface, signature="t",

1508

1055

access="readwrite")

1509

1056

def ApprovalDuration_dbus_property(self, value=None):

1510

1057

if value is None: # get

1511

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

1512

* 1000)

1058

return dbus.UInt64(_timedelta_to_milliseconds(

1059

self.approval_duration))

1513

1060

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

1514

1061

1515

1062

# Name - property

1523

1070

return dbus.String(self.fingerprint)

1524

1071

1525

1072

# Host - property

1526

@dbus_service_property(_interface,

1527

signature="s",

1073

@dbus_service_property(_interface, signature="s",

1528

1074

access="readwrite")

1529

1075

def Host_dbus_property(self, value=None):

1530

1076

if value is None: # get

1531

1077

return dbus.String(self.host)

1532

self.host = str(value)

1078

self.host = value

1533

1079

1534

1080

# Created - property

1535

1081

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

1536

1082

def Created_dbus_property(self):

1537

return datetime_to_dbus(self.created)

1083

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

1538

1084

1539

1085

# LastEnabled - property

1540

1086

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

1542

1088

return datetime_to_dbus(self.last_enabled)

1543

1089

1544

1090

# Enabled - property

1545

@dbus_service_property(_interface,

1546

signature="b",

1091

@dbus_service_property(_interface, signature="b",

1547

1092

access="readwrite")

1548

1093

def Enabled_dbus_property(self, value=None):

1549

1094

if value is None: # get

1554

1099

self.disable()

1555

1100

1556

1101

# LastCheckedOK - property

1557

@dbus_service_property(_interface,

1558

signature="s",

1102

@dbus_service_property(_interface, signature="s",

1559

1103

access="readwrite")

1560

1104

def LastCheckedOK_dbus_property(self, value=None):

1561

1105

if value is not None:

1563

1107

return

1564

1108

return datetime_to_dbus(self.last_checked_ok)

1565

1109

1566

# LastCheckerStatus - property

1567

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

1568

def LastCheckerStatus_dbus_property(self):

1569

return dbus.Int16(self.last_checker_status)

1570

1571

1110

# Expires - property

1572

1111

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

1573

1112

def Expires_dbus_property(self):

1579

1118

return datetime_to_dbus(self.last_approval_request)

1580

1119

1581

1120

# Timeout - property

1582

@dbus_service_property(_interface,

1583

signature="t",

1121

@dbus_service_property(_interface, signature="t",

1584

1122

access="readwrite")

1585

1123

def Timeout_dbus_property(self, value=None):

1586

1124

if value is None: # get

1587

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

1588

old_timeout = self.timeout

1125

return dbus.UInt64(self.timeout_milliseconds())

1589

1126

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

1590

# Reschedule disabling

1591

if self.enabled:

1592

now = datetime.datetime.utcnow()

1593

self.expires += self.timeout - old_timeout

1594

if self.expires <= now:

1595

# The timeout has passed

1596

self.disable()

1597

else:

1598

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

1599

is None):

1600

return

1601

gobject.source_remove(self.disable_initiator_tag)

1602

self.disable_initiator_tag = gobject.timeout_add(

1603

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

1604

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))

1605

1147

1606

1148

# ExtendedTimeout - property

1607

@dbus_service_property(_interface,

1608

signature="t",

1149

@dbus_service_property(_interface, signature="t",

1609

1150

access="readwrite")

1610

1151

def ExtendedTimeout_dbus_property(self, value=None):

1611

1152

if value is None: # get

1612

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

1613

* 1000)

1153

return dbus.UInt64(self.extended_timeout_milliseconds())

1614

1154

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

1615

1155

1616

1156

# Interval - property

1617

@dbus_service_property(_interface,

1618

signature="t",

1157

@dbus_service_property(_interface, signature="t",

1619

1158

access="readwrite")

1620

1159

def Interval_dbus_property(self, value=None):

1621

1160

if value is None: # get

1622

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

1161

return dbus.UInt64(self.interval_milliseconds())

1623

1162

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

1624

1163

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

1625

1164

return

1626

if self.enabled:

1627

# Reschedule checker run

1628

gobject.source_remove(self.checker_initiator_tag)

1629

self.checker_initiator_tag = gobject.timeout_add(

1630

value, self.start_checker)

1631

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

1632

1170

1633

1171

# Checker - property

1634

@dbus_service_property(_interface,

1635

signature="s",

1172

@dbus_service_property(_interface, signature="s",

1636

1173

access="readwrite")

1637

1174

def Checker_dbus_property(self, value=None):

1638

1175

if value is None: # get

1639

1176

return dbus.String(self.checker_command)

1640

self.checker_command = str(value)

1177

self.checker_command = value

1641

1178

1642

1179

# CheckerRunning - property

1643

@dbus_service_property(_interface,

1644

signature="b",

1180

@dbus_service_property(_interface, signature="b",

1645

1181

access="readwrite")

1646

1182

def CheckerRunning_dbus_property(self, value=None):

1647

1183

if value is None: # get

1657

1193

return self.dbus_object_path # is already a dbus.ObjectPath

1658

1194

1659

1195

# Secret = property

1660

@dbus_service_property(_interface,

1661

signature="ay",

1662

access="write",

1663

byte_arrays=True)

1196

@dbus_service_property(_interface, signature="ay",

1197

access="write", byte_arrays=True)

1664

1198

def Secret_dbus_property(self, value):

1665

self.secret = bytes(value)

1199

self.secret = str(value)

1666

1200

1667

1201

del _interface

1668

1202

1672

1206

self._pipe = child_pipe

1673

1207

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

1674

1208

if not self._pipe.recv():

1675

raise KeyError(fpr)

1209

raise KeyError()

1676

1210

1677

1211

def __getattribute__(self, name):

1678

if name == '_pipe':

1212

if(name == '_pipe'):

1679

1213

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

1680

1214

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

1681

1215

data = self._pipe.recv()

1682

1216

if data[0] == 'data':

1683

1217

return data[1]

1684

1218

if data[0] == 'function':

1685

1686

1219

def func(*args, **kwargs):

1687

1220

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

1688

1221

return self._pipe.recv()[1]

1689

1690

1222

return func

1691

1223

1692

1224

def __setattr__(self, name, value):

1693

if name == '_pipe':

1225

if(name == '_pipe'):

1694

1226

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

1695

1227

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

1696

1228

1229

class ClientDBusTransitional(ClientDBus):

1230

__metaclass__ = transitional_dbus_metaclass

1697

1231

1698

1232

class ClientHandler(socketserver.BaseRequestHandler, object):

1699

1233

"""A class to handle client connections.

1704

1238

def handle(self):

1705

1239

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

1706

1240

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

1707

str(self.client_address))

1241

unicode(self.client_address))

1708

1242

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

1709

1243

self.server.child_pipe.fileno())

1710

1244

1711

session = gnutls.connection.ClientSession(

1712

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

1245

session = (gnutls.connection

1246

.ClientSession(self.request,

1247

gnutls.connection

1248

.X509Credentials()))

1713

1249

1714

1250

# Note: gnutls.connection.X509Credentials is really a

1715

1251

# generic GnuTLS certificate credentials object so long as

1724

1260

priority = self.server.gnutls_priority

1725

1261

if priority is None:

1726

1262

priority = "NORMAL"

1727

gnutls.library.functions.gnutls_priority_set_direct(

1728

session._c_object, priority, None)

1263

(gnutls.library.functions

1264

.gnutls_priority_set_direct(session._c_object,

1265

priority, None))

1729

1266

1730

1267

# Start communication using the Mandos protocol

1731

1268

# Get protocol number

1733

1270

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

1734

1271

try:

1735

1272

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

1736

raise RuntimeError(line)

1273

raise RuntimeError

1737

1274

except (ValueError, IndexError, RuntimeError) as error:

1738

1275

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

1739

1276

return

1751

1288

approval_required = False

1752

1289

try:

1753

1290

try:

1754

fpr = self.fingerprint(

1755

self.peer_certificate(session))

1291

fpr = self.fingerprint(self.peer_certificate

1292

(session))

1756

1293

except (TypeError,

1757

1294

gnutls.errors.GNUTLSError) as error:

1758

1295

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

1773

1310

while True:

1774

1311

if not client.enabled:

1775

1312

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

1776

client.name)

1313

client.name)

1777

1314

if self.server.use_dbus:

1778

1315

# Emit D-Bus signal

1779

client.Rejected("Disabled")

1316

client.Rejected("Disabled")

1780

1317

return

1781

1318

1782

if client.approved or not client.approval_delay:

1319

if client._approved or not client.approval_delay:

1783

1320

#We are approved or approval is disabled

1784

1321

break

1785

elif client.approved is None:

1322

elif client._approved is None:

1786

1323

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

1787

1324

client.name)

1788

1325

if self.server.use_dbus:

1789

1326

# Emit D-Bus signal

1790

1327

client.NeedApproval(

1791

client.approval_delay.total_seconds()

1792

* 1000, client.approved_by_default)

1328

client.approval_delay_milliseconds(),

1329

client.approved_by_default)

1793

1330

else:

1794

1331

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

1795

1332

client.name)

1799

1336

return

1800

1337

1801

1338

#wait until timeout or approved

1339

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

1802

1340

time = datetime.datetime.now()

1803

1341

client.changedstate.acquire()

1804

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

1342

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

1805

1343

client.changedstate.release()

1806

1344

time2 = datetime.datetime.now()

1807

1345

if (time2 - time) >= delay:

1823

1361

try:

1824

1362

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

1825

1363

except gnutls.errors.GNUTLSError as error:

1826

logger.warning("gnutls send failed",

1827

exc_info=error)

1364

logger.warning("gnutls send failed")

1828

1365

return

1829

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

1830

len(client.secret) - (sent_size

1831

+ sent))

1366

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

1367

sent, len(client.secret)

1368

- (sent_size + sent))

1832

1369

sent_size += sent

1833

1370

1834

1371

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

1835

# bump the timeout using extended_timeout

1836

client.bump_timeout(client.extended_timeout)

1372

# bump the timeout as if seen

1373

client.checked_ok(client.extended_timeout)

1837

1374

if self.server.use_dbus:

1838

1375

# Emit D-Bus signal

1839

1376

client.GotSecret()

1844

1381

try:

1845

1382

session.bye()

1846

1383

except gnutls.errors.GNUTLSError as error:

1847

logger.warning("GnuTLS bye failed",

1848

exc_info=error)

1384

logger.warning("GnuTLS bye failed")

1849

1385

1850

1386

@staticmethod

1851

1387

def peer_certificate(session):

1852

1388

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

1853

1389

# If not an OpenPGP certificate...

1854

if (gnutls.library.functions.gnutls_certificate_type_get(

1855

session._c_object)

1390

if (gnutls.library.functions

1391

.gnutls_certificate_type_get(session._c_object)

1856

1392

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1857

1393

# ...do the normal thing

1858

1394

return session.peer_certificate

1872

1408

def fingerprint(openpgp):

1873

1409

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1874

1410

# New GnuTLS "datum" with the OpenPGP public key

1875

datum = gnutls.library.types.gnutls_datum_t(

1876

ctypes.cast(ctypes.c_char_p(openpgp),

1877

ctypes.POINTER(ctypes.c_ubyte)),

1878

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))))

1879

1416

# New empty GnuTLS certificate

1880

1417

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1881

gnutls.library.functions.gnutls_openpgp_crt_init(

1882

ctypes.byref(crt))

1418

(gnutls.library.functions

1419

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

1883

1420

# Import the OpenPGP public key into the certificate

1884

gnutls.library.functions.gnutls_openpgp_crt_import(

1885

crt, ctypes.byref(datum),

1886

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))

1887

1425

# Verify the self signature in the key

1888

1426

crtverify = ctypes.c_uint()

1889

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1890

crt, 0, ctypes.byref(crtverify))

1427

(gnutls.library.functions

1428

.gnutls_openpgp_crt_verify_self(crt, 0,

1429

ctypes.byref(crtverify)))

1891

1430

if crtverify.value != 0:

1892

1431

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1893

raise gnutls.errors.CertificateSecurityError(

1894

"Verify failed")

1432

raise (gnutls.errors.CertificateSecurityError

1433

("Verify failed"))

1895

1434

# New buffer for the fingerprint

1896

1435

buf = ctypes.create_string_buffer(20)

1897

1436

buf_len = ctypes.c_size_t()

1898

1437

# Get the fingerprint from the certificate into the buffer

1899

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1900

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)))

1901

1441

# Deinit the certificate

1902

1442

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1903

1443

# Convert the buffer to a Python bytestring

1904

1444

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

1905

1445

# Convert the bytestring to hexadecimal notation

1906

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

1446

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

1907

1447

return hex_fpr

1908

1448

1909

1449

1910

1450

class MultiprocessingMixIn(object):

1911

1451

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

1912

1913

1452

def sub_process_main(self, request, address):

1914

1453

try:

1915

1454

self.finish_request(request, address)

1916

except Exception:

1455

except:

1917

1456

self.handle_error(request, address)

1918

1457

self.close_request(request)

1919

1458

1920

1459

def process_request(self, request, address):

1921

1460

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

1922

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

1923

args = (request, address))

1924

proc.start()

1925

return proc

1461

multiprocessing.Process(target = self.sub_process_main,

1462

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

1926

1463

1927

1464

1928

1465

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1929

1466

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

1930

1931

1467

def process_request(self, request, client_address):

1932

1468

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

1933

1469

1935

1471

"""

1936

1472

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1937

1473

1938

proc = MultiprocessingMixIn.process_request(self, request,

1939

client_address)

1474

super(MultiprocessingMixInWithPipe,

1475

self).process_request(request, client_address)

1940

1476

self.child_pipe.close()

1941

self.add_pipe(parent_pipe, proc)

1477

self.add_pipe(parent_pipe)

1942

1478

1943

def add_pipe(self, parent_pipe, proc):

1479

def add_pipe(self, parent_pipe):

1944

1480

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

1945

raise NotImplementedError()

1481

raise NotImplementedError

1946

1482

1947

1483

1948

1484

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1954

1490

interface: None or a network interface name (string)

1955

1491

use_ipv6: Boolean; to use IPv6 or not

1956

1492

"""

1957

1958

1493

def __init__(self, server_address, RequestHandlerClass,

1959

interface=None,

1960

use_ipv6=True,

1961

socketfd=None):

1962

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

1963

creating a new one with socket.socket().

1964

"""

1494

interface=None, use_ipv6=True):

1965

1495

self.interface = interface

1966

1496

if use_ipv6:

1967

1497

self.address_family = socket.AF_INET6

1968

if socketfd is not None:

1969

# Save the file descriptor

1970

self.socketfd = socketfd

1971

# Save the original socket.socket() function

1972

self.socket_socket = socket.socket

1973

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

1974

#

1975

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

1976

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

1977

# patching socket.socket.)

1978

#

1979

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

1980

@functools.wraps(socket.socket)

1981

def socket_wrapper(*args, **kwargs):

1982

# Restore original function so subsequent calls are

1983

# not affected.

1984

socket.socket = self.socket_socket

1985

del self.socket_socket

1986

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

1987

# saved file descriptor.

1988

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

1989

# Replace socket.socket() function with wrapper

1990

socket.socket = socket_wrapper

1991

# The socketserver.TCPServer.__init__ will call

1992

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

1993

# socket_wrapper(), if socketfd was set.

1994

1498

socketserver.TCPServer.__init__(self, server_address,

1995

1499

RequestHandlerClass)

1996

1997

1500

def server_bind(self):

1998

1501

"""This overrides the normal server_bind() function

1999

1502

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

2005

1508

self.interface)

2006

1509

else:

2007

1510

try:

2008

self.socket.setsockopt(

2009

socket.SOL_SOCKET, SO_BINDTODEVICE,

2010

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

1511

self.socket.setsockopt(socket.SOL_SOCKET,

1512

SO_BINDTODEVICE,

1513

str(self.interface

1514

+ '\0'))

2011

1515

except socket.error as error:

2012

if error.errno == errno.EPERM:

2013

logger.error("No permission to bind to"

2014

" interface %s", self.interface)

2015

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:

2016

1521

logger.error("SO_BINDTODEVICE not available;"

2017

1522

" cannot bind to interface %s",

2018

1523

self.interface)

2019

elif error.errno == errno.ENODEV:

2020

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

2021

" cannot bind", self.interface)

2022

1524

else:

2023

1525

raise

2024

1526

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

2027

1529

if self.address_family == socket.AF_INET6:

2028

1530

any_address = "::" # in6addr_any

2029

1531

else:

2030

any_address = "0.0.0.0" # INADDR_ANY

1532

any_address = socket.INADDR_ANY

2031

1533

self.server_address = (any_address,

2032

1534

self.server_address[1])

2033

1535

elif not self.server_address[1]:

2034

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

1536

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

1537

0)

2035

1538

# if self.interface:

2036

1539

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

2037

1540

# 0, # port

2051

1554

2052

1555

Assumes a gobject.MainLoop event loop.

2053

1556

"""

2054

2055

1557

def __init__(self, server_address, RequestHandlerClass,

2056

interface=None,

2057

use_ipv6=True,

2058

clients=None,

2059

gnutls_priority=None,

2060

use_dbus=True,

2061

socketfd=None):

1558

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

1559

gnutls_priority=None, use_dbus=True):

2062

1560

self.enabled = False

2063

1561

self.clients = clients

2064

1562

if self.clients is None:

2065

self.clients = {}

1563

self.clients = set()

2066

1564

self.use_dbus = use_dbus

2067

1565

self.gnutls_priority = gnutls_priority

2068

1566

IPv6_TCPServer.__init__(self, server_address,

2069

1567

RequestHandlerClass,

2070

1568

interface = interface,

2071

use_ipv6 = use_ipv6,

2072

socketfd = socketfd)

2073

1569

use_ipv6 = use_ipv6)

2074

1570

def server_activate(self):

2075

1571

if self.enabled:

2076

1572

return socketserver.TCPServer.server_activate(self)

2077

2078

1573

def enable(self):

2079

1574

self.enabled = True

2080

2081

def add_pipe(self, parent_pipe, proc):

1575

def add_pipe(self, parent_pipe):

2082

1576

# Call "handle_ipc" for both data and EOF events

2083

gobject.io_add_watch(

2084

parent_pipe.fileno(),

2085

gobject.IO_IN | gobject.IO_HUP,

2086

functools.partial(self.handle_ipc,

2087

parent_pipe = parent_pipe,

2088

proc = proc))

2089

2090

def handle_ipc(self, source, condition,

2091

parent_pipe=None,

2092

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,

2093

1583

client_object=None):

2094

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

2095

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

2096

# Wait for other process to exit

2097

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):

2098

1600

return False

2099

1601

2100

1602

# Read a request from the child

2105

1607

fpr = request[1]

2106

1608

address = request[2]

2107

1609

2108

for c in self.clients.itervalues():

1610

for c in self.clients:

2109

1611

if c.fingerprint == fpr:

2110

1612

client = c

2111

1613

break

2114

1616

"dress: %s", fpr, address)

2115

1617

if self.use_dbus:

2116

1618

# Emit D-Bus signal

2117

mandos_dbus_service.ClientNotFound(fpr,

2118

address[0])

1619

mandos_dbus_service.ClientNotFound(fpr, address[0])

2119

1620

parent_pipe.send(False)

2120

1621

return False

2121

1622

2122

gobject.io_add_watch(

2123

parent_pipe.fileno(),

2124

gobject.IO_IN | gobject.IO_HUP,

2125

functools.partial(self.handle_ipc,

2126

parent_pipe = parent_pipe,

2127

proc = proc,

2128

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))

2129

1628

parent_pipe.send(True)

2130

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

2131

# same fileno

1629

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

2132

1630

return False

2133

1631

if command == 'funcall':

2134

1632

funcname = request[1]

2135

1633

args = request[2]

2136

1634

kwargs = request[3]

2137

1635

2138

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

2139

funcname)(*args,

2140

**kwargs)))

1636

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

2141

1637

2142

1638

if command == 'getattr':

2143

1639

attrname = request[1]

2144

if isinstance(client_object.__getattribute__(attrname),

2145

collections.Callable):

2146

parent_pipe.send(('function', ))

1640

if callable(client_object.__getattribute__(attrname)):

1641

parent_pipe.send(('function',))

2147

1642

else:

2148

parent_pipe.send((

2149

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

1643

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

2150

1644

2151

1645

if command == 'setattr':

2152

1646

attrname = request[1]

2156

1650

return True

2157

1651

2158

1652

2159

def rfc3339_duration_to_delta(duration):

2160

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

2161

2162

>>> rfc3339_duration_to_delta("P7D")

2163

datetime.timedelta(7)

2164

>>> rfc3339_duration_to_delta("PT60S")

2165

datetime.timedelta(0, 60)

2166

>>> rfc3339_duration_to_delta("PT60M")

2167

datetime.timedelta(0, 3600)

2168

>>> rfc3339_duration_to_delta("PT24H")

2169

datetime.timedelta(1)

2170

>>> rfc3339_duration_to_delta("P1W")

2171

datetime.timedelta(7)

2172

>>> rfc3339_duration_to_delta("PT5M30S")

2173

datetime.timedelta(0, 330)

2174

>>> rfc3339_duration_to_delta("P1DT3M20S")

2175

datetime.timedelta(1, 200)

2176

"""

2177

2178

# Parsing an RFC 3339 duration with regular expressions is not

2179

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

2180

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

2181

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

2182

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

2183

# avoid excessive use of external libraries.

2184

2185

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

2186

Token = collections.namedtuple("Token", (

2187

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

2188

# a "group" containing digits

2189

"value", # datetime.timedelta or None

2190

"followers")) # Tokens valid after this token

2191

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

2192

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

2193

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

2194

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

2195

datetime.timedelta(seconds=1),

2196

frozenset((token_end, )))

2197

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

2198

datetime.timedelta(minutes=1),

2199

frozenset((token_second, token_end)))

2200

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

2201

datetime.timedelta(hours=1),

2202

frozenset((token_minute, token_end)))

2203

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

2204

None,

2205

frozenset((token_hour, token_minute,

2206

token_second)))

2207

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

2208

datetime.timedelta(days=1),

2209

frozenset((token_time, token_end)))

2210

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

2211

datetime.timedelta(weeks=4),

2212

frozenset((token_day, token_end)))

2213

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

2214

datetime.timedelta(weeks=52),

2215

frozenset((token_month, token_end)))

2216

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

2217

datetime.timedelta(weeks=1),

2218

frozenset((token_end, )))

2219

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

2220

frozenset((token_year, token_month,

2221

token_day, token_time,

2222

token_week)))

2223

# Define starting values

2224

value = datetime.timedelta() # Value so far

2225

found_token = None

2226

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

2227

s = duration # String left to parse

2228

# Loop until end token is found

2229

while found_token is not token_end:

2230

# Search for any currently valid tokens

2231

for token in followers:

2232

match = token.regexp.match(s)

2233

if match is not None:

2234

# Token found

2235

if token.value is not None:

2236

# Value found, parse digits

2237

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

2238

# Add to value so far

2239

value += factor * token.value

2240

# Strip token from string

2241

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

2242

# Go to found token

2243

found_token = token

2244

# Set valid next tokens

2245

followers = found_token.followers

2246

break

2247

else:

2248

# No currently valid tokens were found

2249

raise ValueError("Invalid RFC 3339 duration: {!r}"

2250

.format(duration))

2251

# End token found

2252

return value

2253

2254

2255

1653

def string_to_delta(interval):

2256

1654

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

2257

1655

2268

1666

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

2269

1667

datetime.timedelta(0, 330)

2270

1668

"""

2271

2272

try:

2273

return rfc3339_duration_to_delta(interval)

2274

except ValueError:

2275

pass

2276

2277

1669

timevalue = datetime.timedelta(0)

2278

1670

for s in interval.split():

2279

1671

try:

2280

suffix = s[-1]

1672

suffix = unicode(s[-1])

2281

1673

value = int(s[:-1])

2282

1674

if suffix == "d":

2283

1675

delta = datetime.timedelta(value)

2290

1682

elif suffix == "w":

2291

1683

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

2292

1684

else:

2293

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

2294

except IndexError as e:

1685

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

1686

except (ValueError, IndexError) as e:

2295

1687

raise ValueError(*(e.args))

2296

1688

timevalue += delta

2297

1689

return timevalue

2298

1690

2299

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

2300

1716

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

2301

1717

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

2302

1718

2310

1726

sys.exit()

2311

1727

if not noclose:

2312

1728

# Close all standard open file descriptors

2313

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

1729

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

2314

1730

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

2315

1731

raise OSError(errno.ENODEV,

2316

"{} not a character device"

2317

.format(os.devnull))

1732

"%s not a character device"

1733

% os.path.devnull)

2318

1734

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

2319

1735

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

2320

1736

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

2329

1745

2330

1746

parser = argparse.ArgumentParser()

2331

1747

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

2332

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

1748

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

2333

1749

help="show version number and exit")

2334

1750

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

2335

1751

help="Bind to interface IF")

2341

1757

help="Run self-test")

2342

1758

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

2343

1759

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

2344

" to terminal", default=None)

1760

" to terminal")

2345

1761

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

2346

1762

help="Debug level for stdout output")

2347

1763

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

2354

1770

" files")

2355

1771

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

2356

1772

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

2357

" system bus interface", default=None)

1773

" system bus interface")

2358

1774

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

2359

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

2360

default=None)

2361

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

2362

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

2363

" state", default=None)

2364

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

2365

help="Specify a file descriptor to a network"

2366

" socket to use instead of creating one")

2367

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

2368

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

2369

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

2370

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

2371

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

2372

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

2373

default=None)

2374

1775

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

2375

1776

options = parser.parse_args()

2376

1777

2377

1778

if options.check:

2378

1779

import doctest

2379

fail_count, test_count = doctest.testmod()

2380

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

1780

doctest.testmod()

1781

sys.exit()

2381

1782

2382

1783

# Default values for config file for server-global settings

2383

1784

server_defaults = { "interface": "",

2385

1786

"port": "",

2386

1787

"debug": "False",

2387

1788

"priority":

2388

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

2389

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

1789

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

2390

1790

"servicename": "Mandos",

2391

1791

"use_dbus": "True",

2392

1792

"use_ipv6": "True",

2393

1793

"debuglevel": "",

2394

"restore": "True",

2395

"socket": "",

2396

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

2397

"foreground": "False",

2398

"zeroconf": "True",

2399

}

1794

}

2400

1795

2401

1796

# Parse config file for server-global settings

2402

1797

server_config = configparser.SafeConfigParser(server_defaults)

2403

1798

del server_defaults

2404

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

1799

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

1800

"mandos.conf"))

2405

1801

# Convert the SafeConfigParser object to a dict

2406

1802

server_settings = server_config.defaults()

2407

1803

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

2408

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

1804

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

2409

1805

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

2410

1806

option)

2411

1807

if server_settings["port"]:

2412

1808

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

2413

1809

"port")

2414

if server_settings["socket"]:

2415

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

2416

"socket")

2417

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

2418

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

2419

# happen with a supplied network socket.

2420

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

2421

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

2422

["socket"])

2423

1810

del server_config

2424

1811

2425

1812

# Override the settings from the config file with command line

2426

1813

# options, if set.

2427

1814

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

2428

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

2429

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

2430

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

1815

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

1816

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

2431

1817

value = getattr(options, option)

2432

1818

if value is not None:

2433

1819

server_settings[option] = value

2434

1820

del options

2435

1821

# Force all strings to be unicode

2436

1822

for option in server_settings.keys():

2437

if isinstance(server_settings[option], bytes):

2438

server_settings[option] = (server_settings[option]

2439

.decode("utf-8"))

2440

# Force all boolean options to be boolean

2441

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

2442

"foreground", "zeroconf"):

2443

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

2444

# Debug implies foreground

2445

if server_settings["debug"]:

2446

server_settings["foreground"] = True

1823

if type(server_settings[option]) is str:

1824

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

2447

1825

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

2448

1826

2449

1827

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

2450

1828

2451

if (not server_settings["zeroconf"]

2452

and not (server_settings["port"]

2453

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

2454

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

2455

2456

1829

# For convenience

2457

1830

debug = server_settings["debug"]

2458

1831

debuglevel = server_settings["debuglevel"]

2459

1832

use_dbus = server_settings["use_dbus"]

2460

1833

use_ipv6 = server_settings["use_ipv6"]

2461

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

2462

stored_state_file)

2463

foreground = server_settings["foreground"]

2464

zeroconf = server_settings["zeroconf"]

2465

2466

if debug:

2467

initlogger(debug, logging.DEBUG)

2468

else:

2469

if not debuglevel:

2470

initlogger(debug)

2471

else:

2472

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

2473

initlogger(debug, level)

2474

1834

2475

1835

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

2476

syslogger.setFormatter(

2477

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

2478

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

2479

server_settings["servicename"])))

1836

syslogger.setFormatter(logging.Formatter

1837

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

1838

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

1839

% server_settings["servicename"]))

2480

1840

2481

1841

# Parse config file with clients

2482

client_config = configparser.SafeConfigParser(Client

2483

.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)

2484

1851

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

2485

1852

"clients.conf"))

2486

1853

2487

1854

global mandos_dbus_service

2488

1855

mandos_dbus_service = None

2489

1856

2490

socketfd = None

2491

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

2492

socketfd = server_settings["socket"]

2493

tcp_server = MandosServer(

2494

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

2495

ClientHandler,

2496

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

2497

use_ipv6=use_ipv6,

2498

gnutls_priority=server_settings["priority"],

2499

use_dbus=use_dbus,

2500

socketfd=socketfd)

2501

if not foreground:

2502

pidfilename = "/run/mandos.pid"

2503

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

2504

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

2505

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"

2506

1868

try:

2507

pidfile = codecs.open(pidfilename, "w", encoding="utf-8")

2508

except IOError as e:

2509

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

2510

exc_info=e)

1869

pidfile = open(pidfilename, "w")

1870

except IOError:

1871

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

2511

1872

2512

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:

2513

1877

try:

2514

uid = pwd.getpwnam(name).pw_uid

2515

gid = pwd.getpwnam(name).pw_gid

2516

break

1878

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

1879

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

2517

1880

except KeyError:

2518

continue

2519

else:

2520

uid = 65534

2521

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

2522

1887

try:

2523

1888

os.setgid(gid)

2524

1889

os.setuid(uid)

2525

1890

except OSError as error:

2526

if error.errno != errno.EPERM:

2527

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)

2528

1901

2529

1902

if debug:

2530

1903

# Enable all possible GnuTLS debugging

2537

1910

def debug_gnutls(level, string):

2538

1911

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

2539

1912

2540

gnutls.library.functions.gnutls_global_set_log_function(

2541

debug_gnutls)

1913

(gnutls.library.functions

1914

.gnutls_global_set_log_function(debug_gnutls))

2542

1915

2543

1916

# Redirect stdin so all checkers get /dev/null

2544

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

1917

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

2545

1918

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

2546

1919

if null > 2:

2547

1920

os.close(null)

1921

else:

1922

# No console logging

1923

logger.removeHandler(console)

2548

1924

2549

1925

# Need to fork before connecting to D-Bus

2550

if not foreground:

1926

if not debug:

2551

1927

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

2552

1928

daemon()

2553

1929

2554

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

2555

# need to inform gobject that threads will be used.

2556

gobject.threads_init()

2557

2558

1930

global main_loop

2559

1931

# From the Avahi example code

2560

DBusGMainLoop(set_as_default=True)

1932

DBusGMainLoop(set_as_default=True )

2561

1933

main_loop = gobject.MainLoop()

2562

1934

bus = dbus.SystemBus()

2563

1935

# End of Avahi example code

2564

1936

if use_dbus:

2565

1937

try:

2566

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

2567

bus,

2568

do_not_queue=True)

2569

old_bus_name = dbus.service.BusName(

2570

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

2571

do_not_queue=True)

2572

except dbus.exceptions.DBusException as e:

2573

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

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)

1942

except dbus.exceptions.NameExistsException as e:

1943

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

2574

1944

use_dbus = False

2575

1945

server_settings["use_dbus"] = False

2576

1946

tcp_server.use_dbus = False

2577

if zeroconf:

2578

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2579

service = AvahiServiceToSyslog(

2580

name = server_settings["servicename"],

2581

servicetype = "_mandos._tcp",

2582

protocol = protocol,

2583

bus = bus)

2584

if server_settings["interface"]:

2585

service.interface = if_nametoindex(

2586

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"])))

2587

1954

2588

1955

global multiprocessing_manager

2589

1956

multiprocessing_manager = multiprocessing.Manager()

2590

1957

2591

1958

client_class = Client

2592

1959

if use_dbus:

2593

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

2594

2595

client_settings = Client.config_parser(client_config)

2596

old_client_settings = {}

2597

clients_data = {}

2598

2599

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

2600

global wnull

2601

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

2602

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

2603

# mode

2604

if debug or not foreground:

2605

wnull.close()

2606

2607

# Get client data and settings from last running state.

2608

if server_settings["restore"]:

2609

try:

2610

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

2611

clients_data, old_client_settings = pickle.load(

2612

stored_state)

2613

os.remove(stored_state_path)

2614

except IOError as e:

2615

if e.errno == errno.ENOENT:

2616

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

2617

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

2618

else:

2619

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

2620

exc_info=e)

2621

raise

2622

except EOFError as e:

2623

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

2624

"EOFError:",

2625

exc_info=e)

2626

2627

with PGPEngine() as pgp:

2628

for client_name, client in clients_data.items():

2629

# Skip removed clients

2630

if client_name not in client_settings:

2631

continue

2632

2633

# Decide which value to use after restoring saved state.

2634

# We have three different values: Old config file,

2635

# new config file, and saved state.

2636

# New config value takes precedence if it differs from old

2637

# config value, otherwise use saved state.

2638

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

2639

try:

2640

# For each value in new config, check if it

2641

# differs from the old config value (Except for

2642

# the "secret" attribute)

2643

if (name != "secret"

2644

and (value !=

2645

old_client_settings[client_name][name])):

2646

client[name] = value

2647

except KeyError:

2648

pass

2649

2650

# Clients who has passed its expire date can still be

2651

# enabled if its last checker was successful. A Client

2652

# whose checker succeeded before we stored its state is

2653

# assumed to have successfully run all checkers during

2654

# downtime.

2655

if client["enabled"]:

2656

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

2657

if not client["last_checked_ok"]:

2658

logger.warning(

2659

"disabling client {} - Client never "

2660

"performed a successful checker".format(

2661

client_name))

2662

client["enabled"] = False

2663

elif client["last_checker_status"] != 0:

2664

logger.warning(

2665

"disabling client {} - Client last"

2666

" checker failed with error code"

2667

" {}".format(

2668

client_name,

2669

client["last_checker_status"]))

2670

client["enabled"] = False

2671

else:

2672

client["expires"] = (

2673

datetime.datetime.utcnow()

2674

+ client["timeout"])

2675

logger.debug("Last checker succeeded,"

2676

" keeping {} enabled".format(

2677

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):

2678

1968

try:

2679

client["secret"] = pgp.decrypt(

2680

client["encrypted_secret"],

2681

client_settings[client_name]["secret"])

2682

except PGPError:

2683

# If decryption fails, we use secret from new settings

2684

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

2685

client_name))

2686

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

2687

["secret"])

2688

2689

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

2690

for client_name in (set(old_client_settings)

2691

- set(client_settings)):

2692

del clients_data[client_name]

2693

for client_name in (set(client_settings)

2694

- set(old_client_settings)):

2695

clients_data[client_name] = client_settings[client_name]

2696

2697

# Create all client objects

2698

for client_name, client in clients_data.items():

2699

tcp_server.clients[client_name] = client_class(

2700

name = client_name,

2701

settings = client,

2702

server_settings = server_settings)

2703

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()))

2704

1978

if not tcp_server.clients:

2705

1979

logger.warning("No clients defined")

2706

2707

if not foreground:

2708

if pidfile is not None:

2709

pid = os.getpid()

2710

try:

2711

with pidfile:

2712

print(pid, file=pidfile)

2713

except IOError:

2714

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

2715

pidfilename, pid)

2716

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

2717

1993

del pidfilename

1994

1995

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

2718

1996

2719

1997

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

2720

1998

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

2721

1999

2722

2000

if use_dbus:

2723

2724

@alternate_dbus_interfaces(

2725

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

2726

class MandosDBusService(DBusObjectWithProperties):

2001

class MandosDBusService(dbus.service.Object):

2727

2002

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

2728

2729

2003

def __init__(self):

2730

2004

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

2731

2732

_interface = "se.recompile.Mandos"

2733

2734

@dbus_interface_annotations(_interface)

2735

def _foo(self):

2736

return {

2737

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

2738

"false" }

2005

_interface = "se.bsnet.fukt.Mandos"

2739

2006

2740

2007

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

2741

2008

def ClientAdded(self, objpath):

2755

2022

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

2756

2023

def GetAllClients(self):

2757

2024

"D-Bus method"

2758

return dbus.Array(c.dbus_object_path for c in

2759

tcp_server.clients.itervalues())

2025

return dbus.Array(c.dbus_object_path

2026

for c in tcp_server.clients)

2760

2027

2761

2028

@dbus.service.method(_interface,

2762

2029

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

2763

2030

def GetAllClientsWithProperties(self):

2764

2031

"D-Bus method"

2765

2032

return dbus.Dictionary(

2766

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

2767

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

2033

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

2034

for c in tcp_server.clients),

2768

2035

signature="oa{sv}")

2769

2036

2770

2037

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

2771

2038

def RemoveClient(self, object_path):

2772

2039

"D-Bus method"

2773

for c in tcp_server.clients.itervalues():

2040

for c in tcp_server.clients:

2774

2041

if c.dbus_object_path == object_path:

2775

del tcp_server.clients[c.name]

2042

tcp_server.clients.remove(c)

2776

2043

c.remove_from_connection()

2777

2044

# Don't signal anything except ClientRemoved

2778

2045

c.disable(quiet=True)

2783

2050

2784

2051

del _interface

2785

2052

2786

mandos_dbus_service = MandosDBusService()

2053

class MandosDBusServiceTransitional(MandosDBusService):

2054

__metaclass__ = transitional_dbus_metaclass

2055

mandos_dbus_service = MandosDBusServiceTransitional()

2787

2056

2788

2057

def cleanup():

2789

2058

"Cleanup function; run on exit"

2790

if zeroconf:

2791

service.cleanup()

2792

2793

multiprocessing.active_children()

2794

wnull.close()

2795

if not (tcp_server.clients or client_settings):

2796

return

2797

2798

# Store client before exiting. Secrets are encrypted with key

2799

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

2800

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

2801

clients = {}

2802

with PGPEngine() as pgp:

2803

for client in tcp_server.clients.itervalues():

2804

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

2805

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

2806

key)

2807

client_dict = {}

2808

2809

# A list of attributes that can not be pickled

2810

# + secret.

2811

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

2812

"checker", "server_settings" }

2813

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

2814

.Object):

2815

exclude.add(name)

2816

2817

client_dict["encrypted_secret"] = (client

2818

.encrypted_secret)

2819

for attr in client.client_structure:

2820

if attr not in exclude:

2821

client_dict[attr] = getattr(client, attr)

2822

2823

clients[client.name] = client_dict

2824

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

2825

2826

try:

2827

with tempfile.NamedTemporaryFile(

2828

mode='wb',

2829

suffix=".pickle",

2830

prefix='clients-',

2831

dir=os.path.dirname(stored_state_path),

2832

delete=False) as stored_state:

2833

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

2834

tempname = stored_state.name

2835

os.rename(tempname, stored_state_path)

2836

except (IOError, OSError) as e:

2837

if not debug:

2838

try:

2839

os.remove(tempname)

2840

except NameError:

2841

pass

2842

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

2843

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

2844

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

2845

else:

2846

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

2847

exc_info=e)

2848

raise

2849

2850

# Delete all clients, and settings from config

2059

service.cleanup()

2060

2851

2061

while tcp_server.clients:

2852

name, client = tcp_server.clients.popitem()

2062

client = tcp_server.clients.pop()

2853

2063

if use_dbus:

2854

2064

client.remove_from_connection()

2065

client.disable_hook = None

2855

2066

# Don't signal anything except ClientRemoved

2856

2067

client.disable(quiet=True)

2857

2068

if use_dbus:

2858

2069

# Emit D-Bus signal

2859

mandos_dbus_service.ClientRemoved(

2860

client.dbus_object_path, client.name)

2861

client_settings.clear()

2070

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2071

client.name)

2862

2072

2863

2073

atexit.register(cleanup)

2864

2074

2865

for client in tcp_server.clients.itervalues():

2075

for client in tcp_server.clients:

2866

2076

if use_dbus:

2867

2077

# Emit D-Bus signal

2868

2078

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2869

# Need to initiate checking of clients

2870

if client.enabled:

2871

client.init_checker()

2079

client.enable()

2872

2080

2873

2081

tcp_server.enable()

2874

2082

tcp_server.server_activate()

2875

2083

2876

2084

# Find out what port we got

2877

if zeroconf:

2878

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

2085

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

2879

2086

if use_ipv6:

2880

2087

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

2881

" flowinfo %d, scope_id %d",

2882

*tcp_server.socket.getsockname())

2088

" flowinfo %d, scope_id %d"

2089

% tcp_server.socket.getsockname())

2883

2090

else: # IPv4

2884

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

2885

*tcp_server.socket.getsockname())

2091

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

2092

% tcp_server.socket.getsockname())

2886

2093

2887

2094

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

2888

2095

2889

2096

try:

2890

if zeroconf:

2891

# From the Avahi example code

2892

try:

2893

service.activate()

2894

except dbus.exceptions.DBusException as error:

2895

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

2896

cleanup()

2897

sys.exit(1)

2898

# 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

2899

2105

2900

2106

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

2901

2107

lambda *args, **kwargs:

2905

2111

logger.debug("Starting main loop")

2906

2112

main_loop.run()

2907

2113

except AvahiError as error:

2908

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

2114

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

2909

2115

cleanup()

2910

2116

sys.exit(1)

2911

2117

except KeyboardInterrupt: