/mandos/trunk : revision 505.3.2

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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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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 = "1.4.1"

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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

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.GetAlternativeServiceName(self.name))

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

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self.name)

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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,

376

dbus.exceptions.DBusException):

228

dbus.exceptions.DBusException) as e:

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pass

378

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self.group = None

379

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self.remove()

380

381

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

382

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

383

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

384

bad_states = {

385

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",

389

}

235

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",

240

avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

390

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if state in bad_states:

391

243

if bad_states[state] is not None:

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if error is None:

395

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logger.error(bad_states[state] + ": %r", error)

396

248

self.cleanup()

397

249

elif state == avahi.SERVER_RUNNING:

398

try:

399

self.add()

400

except dbus.exceptions.DBusException as error:

401

if (error.get_dbus_name()

402

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

403

logger.info("Local Zeroconf service name"

404

" collision.")

405

return self.rename(remove=False)

406

else:

407

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

408

self.cleanup()

409

os._exit(1)

250

self.add()

410

251

else:

411

252

if error is None:

412

253

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

413

254

else:

414

255

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

415

416

256

def activate(self):

417

257

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

418

258

if self.server is None:

422

262

follow_name_owner_changes=True),

423

263

avahi.DBUS_INTERFACE_SERVER)

424

264

self.server.connect_to_signal("StateChanged",

425

self.server_state_changed)

265

self.server_state_changed)

426

266

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

427

267

428

268

429

class AvahiServiceToSyslog(AvahiService):

430

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

431

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

432

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

433

syslogger.setFormatter(logging.Formatter(

434

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

435

.format(self.name)))

436

return ret

437

438

def call_pipe(connection, # : multiprocessing.Connection

439

func, *args, **kwargs):

440

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

441

442

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

443

return value on the provided multiprocessing.Connection.

444

"""

445

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

446

connection.close()

447

269

def _timedelta_to_milliseconds(td):

270

"Convert a datetime.timedelta() to milliseconds"

271

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

272

+ (td.seconds * 1000)

273

+ (td.microseconds // 1000))

274

448

275

class Client(object):

449

276

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

450

277

451

278

Attributes:

452

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

279

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

453

280

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

454

281

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

455

282

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

462

289

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

463

290

checker_initiator_tag: a gobject event source tag, or None

464

291

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

465

client_structure: Object describing what attributes a client has

466

and is used for storing the client at exit

467

292

current_checker_command: string; current running checker_command

293

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

468

294

disable_initiator_tag: a gobject event source tag, or None

469

295

enabled: bool()

470

296

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

473

299

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

474

300

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

475

301

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

476

last_checker_status: integer between 0 and 255 reflecting exit

477

status of last checker. -1 reflects crashed

478

checker, -2 means no checker completed yet.

479

last_checker_signal: The signal which killed the last checker, if

480

last_checker_status is -1

481

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

302

last_enabled: datetime.datetime(); (UTC)

482

303

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

483

304

D-Bus identifiers

484

305

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

485

306

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

486

307

until this client is disabled

487

extended_timeout: extra long timeout when secret has been sent

308

extended_timeout: extra long timeout when password has been sent

488

309

runtime_expansions: Allowed attributes for runtime expansion.

489

310

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

490

311

disabled, or None

491

server_settings: The server_settings dict from main()

492

312

"""

493

313

494

314

runtime_expansions = ("approval_delay", "approval_duration",

495

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

496

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

497

"last_approval_request", "last_checked_ok",

315

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

316

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

498

317

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

499

client_defaults = {

500

"timeout": "PT5M",

501

"extended_timeout": "PT15M",

502

"interval": "PT2M",

503

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

504

"host": "",

505

"approval_delay": "PT0S",

506

"approval_duration": "PT1S",

507

"approved_by_default": "True",

508

"enabled": "True",

509

}

510

511

@staticmethod

512

def config_parser(config):

513

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

514

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

515

with exceptions for any special settings as defined above.

516

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

517

value given the same arguments.

518

"""

519

settings = {}

520

for client_name in config.sections():

521

section = dict(config.items(client_name))

522

client = settings[client_name] = {}

523

524

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

525

# Reformat values from string types to Python types

526

client["approved_by_default"] = config.getboolean(

527

client_name, "approved_by_default")

528

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

529

"enabled")

530

531

# Uppercase and remove spaces from fingerprint for later

532

# comparison purposes with return value from the

533

# fingerprint() function

534

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

535

.replace(" ", ""))

536

if "secret" in section:

537

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

538

elif "secfile" in section:

539

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

540

(section["secfile"])),

541

"rb") as secfile:

542

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

543

else:

544

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

545

.format(section))

546

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

547

client["extended_timeout"] = string_to_delta(

548

section["extended_timeout"])

549

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

550

client["approval_delay"] = string_to_delta(

551

section["approval_delay"])

552

client["approval_duration"] = string_to_delta(

553

section["approval_duration"])

554

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

555

client["last_approval_request"] = None

556

client["last_checked_ok"] = None

557

client["last_checker_status"] = -2

558

559

return settings

560

561

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

318

319

def timeout_milliseconds(self):

320

"Return the 'timeout' attribute in milliseconds"

321

return _timedelta_to_milliseconds(self.timeout)

322

323

def extended_timeout_milliseconds(self):

324

"Return the 'extended_timeout' attribute in milliseconds"

325

return _timedelta_to_milliseconds(self.extended_timeout)

326

327

def interval_milliseconds(self):

328

"Return the 'interval' attribute in milliseconds"

329

return _timedelta_to_milliseconds(self.interval)

330

331

def approval_delay_milliseconds(self):

332

return _timedelta_to_milliseconds(self.approval_delay)

333

334

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

335

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

336

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

337

attribute."""

562

338

self.name = name

563

if server_settings is None:

564

server_settings = {}

565

self.server_settings = server_settings

566

# adding all client settings

567

for setting, value in settings.items():

568

setattr(self, setting, value)

569

570

if self.enabled:

571

if not hasattr(self, "last_enabled"):

572

self.last_enabled = datetime.datetime.utcnow()

573

if not hasattr(self, "expires"):

574

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

575

+ self.timeout)

576

else:

577

self.last_enabled = None

578

self.expires = None

579

339

if config is None:

340

config = {}

580

341

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

342

# Uppercase and remove spaces from fingerprint for later

343

# comparison purposes with return value from the fingerprint()

344

# function

345

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

346

.replace(" ", ""))

581

347

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

582

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

583

datetime.datetime.utcnow())

584

585

# attributes specific for this server instance

348

if "secret" in config:

349

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

350

elif "secfile" in config:

351

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

352

(config["secfile"])),

353

"rb") as secfile:

354

self.secret = secfile.read()

355

else:

356

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

357

% self.name)

358

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

359

self.created = datetime.datetime.utcnow()

360

self.enabled = False

361

self.last_approval_request = None

362

self.last_enabled = None

363

self.last_checked_ok = None

364

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

365

self.extended_timeout = string_to_delta(config

366

["extended_timeout"])

367

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

368

self.disable_hook = disable_hook

586

369

self.checker = None

587

370

self.checker_initiator_tag = None

588

371

self.disable_initiator_tag = None

372

self.expires = None

589

373

self.checker_callback_tag = None

374

self.checker_command = config["checker"]

590

375

self.current_checker_command = None

591

self.approved = None

376

self.last_connect = None

377

self._approved = None

378

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

379

True)

592

380

self.approvals_pending = 0

593

self.changedstate = multiprocessing_manager.Condition(

594

multiprocessing_manager.Lock())

595

self.client_structure = [attr

596

for attr in self.__dict__.iterkeys()

597

if not attr.startswith("_")]

598

self.client_structure.append("client_structure")

599

600

for name, t in inspect.getmembers(

601

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

602

if not name.startswith("_"):

603

self.client_structure.append(name)

381

self.approval_delay = string_to_delta(

382

config["approval_delay"])

383

self.approval_duration = string_to_delta(

384

config["approval_duration"])

385

self.changedstate = (multiprocessing_manager

386

.Condition(multiprocessing_manager

387

.Lock()))

604

388

605

# Send notice to process children that client state has changed

606

389

def send_changedstate(self):

607

with self.changedstate:

608

self.changedstate.notify_all()

390

self.changedstate.acquire()

391

self.changedstate.notify_all()

392

self.changedstate.release()

609

393

610

394

def enable(self):

611

395

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

612

396

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

613

397

# Already enabled

614

398

return

399

self.send_changedstate()

400

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

401

# and every interval from then on.

402

self.checker_initiator_tag = (gobject.timeout_add

403

(self.interval_milliseconds(),

404

self.start_checker))

405

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

615

406

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

407

self.disable_initiator_tag = (gobject.timeout_add

408

(self.timeout_milliseconds(),

409

self.disable))

616

410

self.enabled = True

617

411

self.last_enabled = datetime.datetime.utcnow()

618

self.init_checker()

619

self.send_changedstate()

412

# Also start a new checker *right now*.

413

self.start_checker()

620

414

621

415

def disable(self, quiet=True):

622

416

"""Disable this client."""

623

417

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

624

418

return False

625

419

if not quiet:

420

self.send_changedstate()

421

if not quiet:

626

422

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

627

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

423

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

628

424

gobject.source_remove(self.disable_initiator_tag)

629

425

self.disable_initiator_tag = None

630

426

self.expires = None

631

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

427

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

632

428

gobject.source_remove(self.checker_initiator_tag)

633

429

self.checker_initiator_tag = None

634

430

self.stop_checker()

431

if self.disable_hook:

432

self.disable_hook(self)

635

433

self.enabled = False

636

if not quiet:

637

self.send_changedstate()

638

434

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

639

435

return False

640

436

641

437

def __del__(self):

438

self.disable_hook = None

642

439

self.disable()

643

440

644

def init_checker(self):

645

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

646

# and every interval from then on.

647

if self.checker_initiator_tag is not None:

648

gobject.source_remove(self.checker_initiator_tag)

649

self.checker_initiator_tag = gobject.timeout_add(

650

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

651

self.start_checker)

652

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

653

if self.disable_initiator_tag is not None:

654

gobject.source_remove(self.disable_initiator_tag)

655

self.disable_initiator_tag = gobject.timeout_add(

656

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

657

# Also start a new checker *right now*.

658

self.start_checker()

659

660

def checker_callback(self, source, condition, connection,

661

command):

441

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

662

442

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

663

443

self.checker_callback_tag = None

664

444

self.checker = None

665

# Read return code from connection (see call_pipe)

666

returncode = connection.recv()

667

connection.close()

668

669

if returncode >= 0:

670

self.last_checker_status = returncode

671

self.last_checker_signal = None

672

if self.last_checker_status == 0:

445

if os.WIFEXITED(condition):

446

exitstatus = os.WEXITSTATUS(condition)

447

if exitstatus == 0:

673

448

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

674

449

vars(self))

675

450

self.checked_ok()

676

451

else:

677

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

452

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

453

vars(self))

678

454

else:

679

self.last_checker_status = -1

680

self.last_checker_signal = -returncode

681

455

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

682

456

vars(self))

683

return False

684

685

def checked_ok(self):

686

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

687

self.last_checked_ok = datetime.datetime.utcnow()

688

self.last_checker_status = 0

689

self.last_checker_signal = None

690

self.bump_timeout()

691

692

def bump_timeout(self, timeout=None):

693

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

457

458

def checked_ok(self, timeout=None):

459

"""Bump up the timeout for this client.

460

461

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

462

alive and well.

463

"""

694

464

if timeout is None:

695

465

timeout = self.timeout

466

self.last_checked_ok = datetime.datetime.utcnow()

696

467

if self.disable_initiator_tag is not None:

697

468

gobject.source_remove(self.disable_initiator_tag)

698

self.disable_initiator_tag = None

699

469

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

700

self.disable_initiator_tag = gobject.timeout_add(

701

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

470

self.disable_initiator_tag = (gobject.timeout_add

471

(_timedelta_to_milliseconds

472

(timeout), self.disable))

702

473

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

703

474

704

475

def need_approval(self):

710

481

If a checker already exists, leave it running and do

711

482

nothing."""

712

483

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

713

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

714

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

715

# would inevitably timeout, since no checker would get a

716

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

484

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

485

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

486

# client would inevitably timeout, since no checker would get

487

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

717

488

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

718

489

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

719

490

# should be.

720

491

721

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

722

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

723

self.checker.join()

724

self.checker = None

492

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

493

try:

494

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

495

except (AttributeError, OSError) as error:

496

if (isinstance(error, OSError)

497

and error.errno != errno.ECHILD):

498

raise error

499

else:

500

if pid:

501

logger.warning("Checker was a zombie")

502

gobject.source_remove(self.checker_callback_tag)

503

self.checker_callback(pid, status,

504

self.current_checker_command)

725

505

# Start a new checker if needed

726

506

if self.checker is None:

727

# Escape attributes for the shell

728

escaped_attrs = {

729

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

730

for attr in self.runtime_expansions }

731

507

try:

732

command = self.checker_command % escaped_attrs

733

except TypeError as error:

734

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

735

self.checker_command,

736

exc_info=error)

737

return True # Try again later

508

# In case checker_command has exactly one % operator

509

command = self.checker_command % self.host

510

except TypeError:

511

# Escape attributes for the shell

512

escaped_attrs = dict(

513

(attr,

514

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

515

errors=

516

'replace')))

517

for attr in

518

self.runtime_expansions)

519

520

try:

521

command = self.checker_command % escaped_attrs

522

except TypeError as error:

523

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

524

' %s', self.checker_command, error)

525

return True # Try again later

738

526

self.current_checker_command = command

739

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

740

self.name)

741

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

742

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

743

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

744

# always replaced by /dev/null.)

745

# The exception is when not debugging but nevertheless

746

# running in the foreground; use the previously

747

# created wnull.

748

popen_args = { "close_fds": True,

749

"shell": True,

750

"cwd": "/" }

751

if (not self.server_settings["debug"]

752

and self.server_settings["foreground"]):

753

popen_args.update({"stdout": wnull,

754

"stderr": wnull })

755

pipe = multiprocessing.Pipe(duplex = False)

756

self.checker = multiprocessing.Process(

757

target = call_pipe,

758

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

759

kwargs = popen_args)

760

self.checker.start()

761

self.checker_callback_tag = gobject.io_add_watch(

762

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

763

self.checker_callback, pipe[0], command)

527

try:

528

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

529

command, self.name)

530

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

531

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

532

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

533

# always replaced by /dev/null.)

534

self.checker = subprocess.Popen(command,

535

close_fds=True,

536

shell=True, cwd="/")

537

self.checker_callback_tag = (gobject.child_watch_add

538

(self.checker.pid,

539

self.checker_callback,

540

data=command))

541

# The checker may have completed before the gobject

542

# watch was added. Check for this.

543

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

544

if pid:

545

gobject.source_remove(self.checker_callback_tag)

546

self.checker_callback(pid, status, command)

547

except OSError as error:

548

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

549

error)

764

550

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

765

551

return True

766

552

772

558

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

773

559

return

774

560

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

775

self.checker.terminate()

561

try:

562

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

563

#time.sleep(0.5)

564

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

565

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

566

except OSError as error:

567

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

568

raise

776

569

self.checker = None

777

570

778

571

779

def dbus_service_property(dbus_interface,

780

signature="v",

781

access="readwrite",

782

byte_arrays=False):

572

def dbus_service_property(dbus_interface, signature="v",

573

access="readwrite", byte_arrays=False):

783

574

"""Decorators for marking methods of a DBusObjectWithProperties to

784

575

become properties on the D-Bus.

785

576

794

585

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

795

586

if byte_arrays and signature != "ay":

796

587

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

797

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

798

588

" signature %r" % signature)

799

589

def decorator(func):

800

590

func._dbus_is_property = True

801

591

func._dbus_interface = dbus_interface

806

596

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

807

597

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

808

598

return func

809

810

return decorator

811

812

813

def dbus_interface_annotations(dbus_interface):

814

"""Decorator for marking functions returning interface annotations

815

816

Usage:

817

818

@dbus_interface_annotations("org.example.Interface")

819

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

820

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

821

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

822

"false"}

823

"""

824

825

def decorator(func):

826

func._dbus_is_interface = True

827

func._dbus_interface = dbus_interface

828

func._dbus_name = dbus_interface

829

return func

830

831

return decorator

832

833

834

def dbus_annotations(annotations):

835

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

836

Usage:

837

838

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

839

"org.freedesktop.DBus.Property."

840

"EmitsChangedSignal": "false"})

841

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

842

access="r")

843

def Property_dbus_property(self):

844

return dbus.Boolean(False)

845

"""

846

847

def decorator(func):

848

func._dbus_annotations = annotations

849

return func

850

851

599

return decorator

852

600

853

601

854

602

class DBusPropertyException(dbus.exceptions.DBusException):

855

603

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

856

604

"""

857

pass

605

def __unicode__(self):

606

return unicode(str(self))

858

607

859

608

860

609

class DBusPropertyAccessException(DBusPropertyException):

878

627

"""

879

628

880

629

@staticmethod

881

def _is_dbus_thing(thing):

882

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

883

884

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

885

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

886

"""

887

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

888

False)

630

def _is_dbus_property(obj):

631

return getattr(obj, "_dbus_is_property", False)

889

632

890

def _get_all_dbus_things(self, thing):

633

def _get_all_dbus_properties(self):

891

634

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

892

635

"""

893

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

894

athing.__get__(self))

636

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

895

637

for cls in self.__class__.__mro__

896

for name, athing in

897

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

638

for name, prop in

639

inspect.getmembers(cls, self._is_dbus_property))

898

640

899

641

def _get_dbus_property(self, interface_name, property_name):

900

642

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

901

643

property with the specified name and interface.

902

644

"""

903

for cls in self.__class__.__mro__:

904

for name, value in inspect.getmembers(

905

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

645

for cls in self.__class__.__mro__:

646

for name, value in (inspect.getmembers

647

(cls, self._is_dbus_property)):

906

648

if (value._dbus_name == property_name

907

649

and value._dbus_interface == interface_name):

908

650

return value.__get__(self)

909

651

910

652

# No such property

911

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

912

self.dbus_object_path, interface_name, property_name))

653

raise DBusPropertyNotFound(self.dbus_object_path + ":"

654

+ interface_name + "."

655

+ property_name)

913

656

914

@dbus.service.method(dbus.PROPERTIES_IFACE,

915

in_signature="ss",

657

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

916

658

out_signature="v")

917

659

def Get(self, interface_name, property_name):

918

660

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

936

678

# The byte_arrays option is not supported yet on

937

679

# signatures other than "ay".

938

680

if prop._dbus_signature != "ay":

939

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

940

"'ay' signature {!r}"

941

.format(prop._dbus_signature))

942

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

943

for byte in value))

681

raise ValueError

682

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

683

for byte in value))

944

684

prop(value)

945

685

946

@dbus.service.method(dbus.PROPERTIES_IFACE,

947

in_signature="s",

686

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

948

687

out_signature="a{sv}")

949

688

def GetAll(self, interface_name):

950

689

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

952

691

953

692

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

954

693

"""

955

properties = {}

956

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

694

all = {}

695

for name, prop in self._get_all_dbus_properties():

957

696

if (interface_name

958

697

and interface_name != prop._dbus_interface):

959

698

# Interface non-empty but did not match

963

702

continue

964

703

value = prop()

965

704

if not hasattr(value, "variant_level"):

966

properties[name] = value

705

all[name] = value

967

706

continue

968

properties[name] = type(value)(

969

value, variant_level = value.variant_level + 1)

970

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

971

972

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

973

def PropertiesChanged(self, interface_name, changed_properties,

974

invalidated_properties):

975

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

976

standard.

977

"""

978

pass

707

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

708

value.variant_level+1)

709

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

979

710

980

711

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

981

712

out_signature="s",

982

713

path_keyword='object_path',

983

714

connection_keyword='connection')

984

715

def Introspect(self, object_path, connection):

985

"""Overloading of standard D-Bus method.

986

987

Inserts property tags and interface annotation tags.

716

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

988

717

"""

989

718

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

990

719

connection)

991

720

try:

992

721

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

993

994

722

def make_tag(document, name, prop):

995

723

e = document.createElement("property")

996

724

e.setAttribute("name", name)

997

725

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

998

726

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

999

727

return e

1000

1001

728

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

1002

# Add property tags

1003

729

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

1004

730

for name, prop

1005

in self._get_all_dbus_things("property")

731

in self._get_all_dbus_properties()

1006

732

if prop._dbus_interface

1007

733

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

1008

734

if_tag.appendChild(tag)

1009

# Add annotation tags

1010

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

1011

for tag in if_tag.getElementsByTagName(typ):

1012

annots = dict()

1013

for name, prop in (self.

1014

_get_all_dbus_things(typ)):

1015

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

1016

and prop._dbus_interface

1017

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

1018

annots.update(getattr(

1019

prop, "_dbus_annotations", {}))

1020

for name, value in annots.items():

1021

ann_tag = document.createElement(

1022

"annotation")

1023

ann_tag.setAttribute("name", name)

1024

ann_tag.setAttribute("value", value)

1025

tag.appendChild(ann_tag)

1026

# Add interface annotation tags

1027

for annotation, value in dict(

1028

itertools.chain.from_iterable(

1029

annotations().items()

1030

for name, annotations

1031

in self._get_all_dbus_things("interface")

1032

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

1033

)).items():

1034

ann_tag = document.createElement("annotation")

1035

ann_tag.setAttribute("name", annotation)

1036

ann_tag.setAttribute("value", value)

1037

if_tag.appendChild(ann_tag)

1038

735

# Add the names to the return values for the

1039

736

# "org.freedesktop.DBus.Properties" methods

1040

737

if (if_tag.getAttribute("name")

1055

752

except (AttributeError, xml.dom.DOMException,

1056

753

xml.parsers.expat.ExpatError) as error:

1057

754

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

1058

exc_info=error)

755

error)

1059

756

return xmlstring

1060

757

1061

758

1062

def datetime_to_dbus(dt, variant_level=0):

759

def datetime_to_dbus (dt, variant_level=0):

1063

760

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

1064

761

if dt is None:

1065

762

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

1066

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

1067

1068

1069

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1070

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

1071

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

1072

interface names according to the "alt_interface_names" mapping.

1073

Usage:

1074

1075

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

1076

"net.example.AlternateInterface"})

1077

class SampleDBusObject(dbus.service.Object):

1078

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

1079

def SampleDBusMethod():

1080

pass

1081

1082

The above "SampleDBusMethod" on "SampleDBusObject" will be

1083

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

1084

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

1085

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

1086

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

1087

1088

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

1089

(from DBusObjectWithProperties) and interfaces (from the

1090

dbus_interface_annotations decorator).

763

return dbus.String(dt.isoformat(),

764

variant_level=variant_level)

765

766

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

767

.__metaclass__):

768

"""Applied to an empty subclass of a D-Bus object, this metaclass

769

will add additional D-Bus attributes matching a certain pattern.

1091

770

"""

1092

1093

def wrapper(cls):

1094

for orig_interface_name, alt_interface_name in (

1095

alt_interface_names.items()):

1096

attr = {}

1097

interface_names = set()

1098

# Go though all attributes of the class

1099

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

771

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

772

# Go through all the base classes which could have D-Bus

773

# methods, signals, or properties in them

774

for base in (b for b in bases

775

if issubclass(b, dbus.service.Object)):

776

# Go though all attributes of the base class

777

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

1100

778

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

1101

779

# with the wrong interface name

1102

780

if (not hasattr(attribute, "_dbus_interface")

1103

or not attribute._dbus_interface.startswith(

1104

orig_interface_name)):

781

or not attribute._dbus_interface

782

.startswith("se.recompile.Mandos")):

1105

783

continue

1106

784

# Create an alternate D-Bus interface name based on

1107

785

# the current name

1108

alt_interface = attribute._dbus_interface.replace(

1109

orig_interface_name, alt_interface_name)

1110

interface_names.add(alt_interface)

786

alt_interface = (attribute._dbus_interface

787

.replace("se.recompile.Mandos",

788

"se.bsnet.fukt.Mandos"))

1111

789

# Is this a D-Bus signal?

1112

790

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

1113

if sys.version_info.major == 2:

1114

# Extract the original non-method undecorated

1115

# function by black magic

1116

nonmethod_func = (dict(

791

# Extract the original non-method function by

792

# black magic

793

nonmethod_func = (dict(

1117

794

zip(attribute.func_code.co_freevars,

1118

attribute.__closure__))

1119

["func"].cell_contents)

1120

else:

1121

nonmethod_func = attribute

795

attribute.__closure__))["func"]

796

.cell_contents)

1122

797

# Create a new, but exactly alike, function

1123

798

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

1124

799

# with the alternate D-Bus interface name

1125

if sys.version_info.major == 2:

1126

new_function = types.FunctionType(

1127

nonmethod_func.func_code,

1128

nonmethod_func.func_globals,

1129

nonmethod_func.func_name,

1130

nonmethod_func.func_defaults,

1131

nonmethod_func.func_closure)

1132

else:

1133

new_function = types.FunctionType(

1134

nonmethod_func.__code__,

1135

nonmethod_func.__globals__,

1136

nonmethod_func.__name__,

1137

nonmethod_func.__defaults__,

1138

nonmethod_func.__closure__)

1139

new_function = (dbus.service.signal(

1140

alt_interface,

1141

attribute._dbus_signature)(new_function))

1142

# Copy annotations, if any

1143

try:

1144

new_function._dbus_annotations = dict(

1145

attribute._dbus_annotations)

1146

except AttributeError:

1147

pass

800

new_function = (dbus.service.signal

801

(alt_interface,

802

attribute._dbus_signature)

803

(types.FunctionType(

804

nonmethod_func.func_code,

805

nonmethod_func.func_globals,

806

nonmethod_func.func_name,

807

nonmethod_func.func_defaults,

808

nonmethod_func.func_closure)))

1148

809

# Define a creator of a function to call both the

1149

# original and alternate functions, so both the

1150

# original and alternate signals gets sent when

1151

# the function is called

810

# old and new functions, so both the old and new

811

# signals gets sent when the function is called

1152

812

def fixscope(func1, func2):

1153

813

"""This function is a scope container to pass

1154

814

func1 and func2 to the "call_both" function

1155

815

outside of its arguments"""

1156

1157

816

def call_both(*args, **kwargs):

1158

817

"""This function will emit two D-Bus

1159

818

signals by calling func1 and func2"""

1160

819

func1(*args, **kwargs)

1161

820

func2(*args, **kwargs)

1162

1163

821

return call_both

1164

822

# Create the "call_both" function and add it to

1165

823

# the class

1166

attr[attrname] = fixscope(attribute, new_function)

824

attr[attrname] = fixscope(attribute,

825

new_function)

1167

826

# Is this a D-Bus method?

1168

827

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

1169

828

# Create a new, but exactly alike, function

1170

829

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

1171

830

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

1172

831

# to the class.

1173

attr[attrname] = (

1174

dbus.service.method(

1175

alt_interface,

1176

attribute._dbus_in_signature,

1177

attribute._dbus_out_signature)

1178

(types.FunctionType(attribute.func_code,

1179

attribute.func_globals,

1180

attribute.func_name,

1181

attribute.func_defaults,

1182

attribute.func_closure)))

1183

# Copy annotations, if any

1184

try:

1185

attr[attrname]._dbus_annotations = dict(

1186

attribute._dbus_annotations)

1187

except AttributeError:

1188

pass

832

attr[attrname] = (dbus.service.method

833

(alt_interface,

834

attribute._dbus_in_signature,

835

attribute._dbus_out_signature)

836

(types.FunctionType

837

(attribute.func_code,

838

attribute.func_globals,

839

attribute.func_name,

840

attribute.func_defaults,

841

attribute.func_closure)))

1189

842

# Is this a D-Bus property?

1190

843

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

1191

844

# Create a new, but exactly alike, function

1192

845

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

1193

846

# property with the alternate D-Bus interface

1194

847

# name. Add it to the class.

1195

attr[attrname] = (dbus_service_property(

1196

alt_interface, attribute._dbus_signature,

1197

attribute._dbus_access,

1198

attribute._dbus_get_args_options

1199

["byte_arrays"])

1200

(types.FunctionType(

1201

attribute.func_code,

1202

attribute.func_globals,

1203

attribute.func_name,

1204

attribute.func_defaults,

1205

attribute.func_closure)))

1206

# Copy annotations, if any

1207

try:

1208

attr[attrname]._dbus_annotations = dict(

1209

attribute._dbus_annotations)

1210

except AttributeError:

1211

pass

1212

# Is this a D-Bus interface?

1213

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

1214

# Create a new, but exactly alike, function

1215

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

1216

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

1217

# to the class.

1218

attr[attrname] = (

1219

dbus_interface_annotations(alt_interface)

1220

(types.FunctionType(attribute.func_code,

1221

attribute.func_globals,

1222

attribute.func_name,

1223

attribute.func_defaults,

1224

attribute.func_closure)))

1225

if deprecate:

1226

# Deprecate all alternate interfaces

1227

iname="_AlternateDBusNames_interface_annotation{}"

1228

for interface_name in interface_names:

1229

1230

@dbus_interface_annotations(interface_name)

1231

def func(self):

1232

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

1233

"true" }

1234

# Find an unused name

1235

for aname in (iname.format(i)

1236

for i in itertools.count()):

1237

if aname not in attr:

1238

attr[aname] = func

1239

break

1240

if interface_names:

1241

# Replace the class with a new subclass of it with

1242

# methods, signals, etc. as created above.

1243

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

1244

(cls, ), attr)

1245

return cls

1246

1247

return wrapper

1248

1249

1250

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

1251

"se.bsnet.fukt.Mandos"})

848

attr[attrname] = (dbus_service_property

849

(alt_interface,

850

attribute._dbus_signature,

851

attribute._dbus_access,

852

attribute

853

._dbus_get_args_options

854

["byte_arrays"])

855

(types.FunctionType

856

(attribute.func_code,

857

attribute.func_globals,

858

attribute.func_name,

859

attribute.func_defaults,

860

attribute.func_closure)))

861

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

862

1252

863

class ClientDBus(Client, DBusObjectWithProperties):

1253

864

"""A Client class using D-Bus

1254

865

1258

869

"""

1259

870

1260

871

runtime_expansions = (Client.runtime_expansions

1261

+ ("dbus_object_path", ))

1262

1263

_interface = "se.recompile.Mandos.Client"

872

+ ("dbus_object_path",))

1264

873

1265

874

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

1266

875

1267

876

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

877

self._approvals_pending = 0

1268

878

self.bus = bus

1269

879

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

1270

880

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

1271

881

# the D-Bus

1272

client_object_name = str(self.name).translate(

882

client_object_name = unicode(self.name).translate(

1273

883

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

1274

884

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

1275

self.dbus_object_path = dbus.ObjectPath(

1276

"/clients/" + client_object_name)

885

self.dbus_object_path = (dbus.ObjectPath

886

("/clients/" + client_object_name))

1277

887

DBusObjectWithProperties.__init__(self, self.bus,

1278

888

self.dbus_object_path)

1279

1280

def notifychangeproperty(transform_func, dbus_name,

1281

type_func=lambda x: x,

1282

variant_level=1,

1283

invalidate_only=False,

1284

_interface=_interface):

889

890

def notifychangeproperty(transform_func,

891

dbus_name, type_func=lambda x: x,

892

variant_level=1):

1285

893

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

1286

894

its changes to DBus.

1287

895

1288

896

transform_fun: Function that takes a value and a variant_level

1289

897

and transforms it to a D-Bus type.

1290

898

dbus_name: D-Bus name of the variable

1292

900

to the D-Bus. Default: no transform

1293

901

variant_level: D-Bus variant level. Default: 1

1294

902

"""

1295

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

1296

903

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

1297

904

def setter(self, value):

1298

905

if hasattr(self, "dbus_object_path"):

1299

906

if (not hasattr(self, attrname) or

1300

907

type_func(getattr(self, attrname, None))

1301

908

!= type_func(value)):

1302

if invalidate_only:

1303

self.PropertiesChanged(

1304

_interface, dbus.Dictionary(),

1305

dbus.Array((dbus_name, )))

1306

else:

1307

dbus_value = transform_func(

1308

type_func(value),

1309

variant_level = variant_level)

1310

self.PropertyChanged(dbus.String(dbus_name),

1311

dbus_value)

1312

self.PropertiesChanged(

1313

_interface,

1314

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

1315

dbus_value }),

1316

dbus.Array())

909

dbus_value = transform_func(type_func(value),

910

variant_level

911

=variant_level)

912

self.PropertyChanged(dbus.String(dbus_name),

913

dbus_value)

1317

914

setattr(self, attrname, value)

1318

915

1319

916

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

1320

917

918

1321

919

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1322

920

approvals_pending = notifychangeproperty(dbus.Boolean,

1323

921

"ApprovalPending",

1325

923

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

1326

924

last_enabled = notifychangeproperty(datetime_to_dbus,

1327

925

"LastEnabled")

1328

checker = notifychangeproperty(

1329

dbus.Boolean, "CheckerRunning",

1330

type_func = lambda checker: checker is not None)

926

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

927

type_func = lambda checker:

928

checker is not None)

1331

929

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1332

930

"LastCheckedOK")

1333

last_checker_status = notifychangeproperty(dbus.Int16,

1334

"LastCheckerStatus")

1335

931

last_approval_request = notifychangeproperty(

1336

932

datetime_to_dbus, "LastApprovalRequest")

1337

933

approved_by_default = notifychangeproperty(dbus.Boolean,

1338

934

"ApprovedByDefault")

1339

approval_delay = notifychangeproperty(

1340

dbus.UInt64, "ApprovalDelay",

1341

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

935

approval_delay = notifychangeproperty(dbus.UInt16,

936

"ApprovalDelay",

937

type_func =

938

_timedelta_to_milliseconds)

1342

939

approval_duration = notifychangeproperty(

1343

dbus.UInt64, "ApprovalDuration",

1344

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

940

dbus.UInt16, "ApprovalDuration",

941

type_func = _timedelta_to_milliseconds)

1345

942

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

1346

timeout = notifychangeproperty(

1347

dbus.UInt64, "Timeout",

1348

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

943

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

944

type_func =

945

_timedelta_to_milliseconds)

1349

946

extended_timeout = notifychangeproperty(

1350

dbus.UInt64, "ExtendedTimeout",

1351

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

1352

interval = notifychangeproperty(

1353

dbus.UInt64, "Interval",

1354

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

947

dbus.UInt16, "ExtendedTimeout",

948

type_func = _timedelta_to_milliseconds)

949

interval = notifychangeproperty(dbus.UInt16,

950

"Interval",

951

type_func =

952

_timedelta_to_milliseconds)

1355

953

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

1356

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

1357

invalidate_only=True)

1358

954

1359

955

del notifychangeproperty

1360

956

1367

963

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

1368

964

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

1369

965

1370

def checker_callback(self, source, condition,

1371

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

1372

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

1373

connection, command, *args,

1374

**kwargs)

1375

exitstatus = self.last_checker_status

1376

if exitstatus >= 0:

966

def checker_callback(self, pid, condition, command,

967

*args, **kwargs):

968

self.checker_callback_tag = None

969

self.checker = None

970

if os.WIFEXITED(condition):

971

exitstatus = os.WEXITSTATUS(condition)

1377

972

# Emit D-Bus signal

1378

973

self.CheckerCompleted(dbus.Int16(exitstatus),

1379

dbus.Int64(0),

974

dbus.Int64(condition),

1380

975

dbus.String(command))

1381

976

else:

1382

977

# Emit D-Bus signal

1383

978

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

1384

dbus.Int64(

1385

self.last_checker_signal),

979

dbus.Int64(condition),

1386

980

dbus.String(command))

1387

return ret

981

982

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

983

*args, **kwargs)

1388

984

1389

985

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

1390

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

986

old_checker = self.checker

987

if self.checker is not None:

988

old_checker_pid = self.checker.pid

989

else:

990

old_checker_pid = None

1391

991

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

1392

992

# Only if new checker process was started

1393

993

if (self.checker is not None

1397

997

return r

1398

998

1399

999

def _reset_approved(self):

1400

self.approved = None

1000

self._approved = None

1401

1001

return False

1402

1002

1403

1003

def approve(self, value=True):

1404

self.approved = value

1405

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

1406

* 1000), self._reset_approved)

1407

1004

self.send_changedstate()

1005

self._approved = value

1006

gobject.timeout_add(_timedelta_to_milliseconds

1007

(self.approval_duration),

1008

self._reset_approved)

1009

1408

1010

1409

1011

## D-Bus methods, signals & properties

1410

1411

## Interfaces

1012

_interface = "se.recompile.Mandos.Client"

1412

1013

1413

1014

## Signals

1414

1015

1425

1026

pass

1426

1027

1427

1028

# PropertyChanged - signal

1428

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

1429

1029

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

1430

1030

def PropertyChanged(self, property, value):

1431

1031

"D-Bus signal"

1465

1065

self.checked_ok()

1466

1066

1467

1067

# Enable - method

1468

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

1469

1068

@dbus.service.method(_interface)

1470

1069

def Enable(self):

1471

1070

"D-Bus method"

1472

1071

self.enable()

1473

1072

1474

1073

# StartChecker - method

1475

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

1476

1074

@dbus.service.method(_interface)

1477

1075

def StartChecker(self):

1478

1076

"D-Bus method"

1479

1077

self.start_checker()

1480

1078

1481

1079

# Disable - method

1482

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

1483

1080

@dbus.service.method(_interface)

1484

1081

def Disable(self):

1485

1082

"D-Bus method"

1486

1083

self.disable()

1487

1084

1488

1085

# StopChecker - method

1489

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

1490

1086

@dbus.service.method(_interface)

1491

1087

def StopChecker(self):

1492

1088

self.stop_checker()

1499

1095

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

1500

1096

1501

1097

# ApprovedByDefault - property

1502

@dbus_service_property(_interface,

1503

signature="b",

1098

@dbus_service_property(_interface, signature="b",

1504

1099

access="readwrite")

1505

1100

def ApprovedByDefault_dbus_property(self, value=None):

1506

1101

if value is None: # get

1508

1103

self.approved_by_default = bool(value)

1509

1104

1510

1105

# ApprovalDelay - property

1511

@dbus_service_property(_interface,

1512

signature="t",

1106

@dbus_service_property(_interface, signature="t",

1513

1107

access="readwrite")

1514

1108

def ApprovalDelay_dbus_property(self, value=None):

1515

1109

if value is None: # get

1516

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

1517

* 1000)

1110

return dbus.UInt64(self.approval_delay_milliseconds())

1518

1111

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

1519

1112

1520

1113

# ApprovalDuration - property

1521

@dbus_service_property(_interface,

1522

signature="t",

1114

@dbus_service_property(_interface, signature="t",

1523

1115

access="readwrite")

1524

1116

def ApprovalDuration_dbus_property(self, value=None):

1525

1117

if value is None: # get

1526

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

1527

* 1000)

1118

return dbus.UInt64(_timedelta_to_milliseconds(

1119

self.approval_duration))

1528

1120

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

1529

1121

1530

1122

# Name - property

1531

@dbus_annotations(

1532

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1533

1123

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

1534

1124

def Name_dbus_property(self):

1535

1125

return dbus.String(self.name)

1536

1126

1537

1127

# Fingerprint - property

1538

@dbus_annotations(

1539

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1540

1128

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

1541

1129

def Fingerprint_dbus_property(self):

1542

1130

return dbus.String(self.fingerprint)

1543

1131

1544

1132

# Host - property

1545

@dbus_service_property(_interface,

1546

signature="s",

1133

@dbus_service_property(_interface, signature="s",

1547

1134

access="readwrite")

1548

1135

def Host_dbus_property(self, value=None):

1549

1136

if value is None: # get

1550

1137

return dbus.String(self.host)

1551

self.host = str(value)

1138

self.host = value

1552

1139

1553

1140

# Created - property

1554

@dbus_annotations(

1555

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1556

1141

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

1557

1142

def Created_dbus_property(self):

1558

return datetime_to_dbus(self.created)

1143

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

1559

1144

1560

1145

# LastEnabled - property

1561

1146

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

1563

1148

return datetime_to_dbus(self.last_enabled)

1564

1149

1565

1150

# Enabled - property

1566

@dbus_service_property(_interface,

1567

signature="b",

1151

@dbus_service_property(_interface, signature="b",

1568

1152

access="readwrite")

1569

1153

def Enabled_dbus_property(self, value=None):

1570

1154

if value is None: # get

1575

1159

self.disable()

1576

1160

1577

1161

# LastCheckedOK - property

1578

@dbus_service_property(_interface,

1579

signature="s",

1162

@dbus_service_property(_interface, signature="s",

1580

1163

access="readwrite")

1581

1164

def LastCheckedOK_dbus_property(self, value=None):

1582

1165

if value is not None:

1584

1167

return

1585

1168

return datetime_to_dbus(self.last_checked_ok)

1586

1169

1587

# LastCheckerStatus - property

1588

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

1589

def LastCheckerStatus_dbus_property(self):

1590

return dbus.Int16(self.last_checker_status)

1591

1592

1170

# Expires - property

1593

1171

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

1594

1172

def Expires_dbus_property(self):

1600

1178

return datetime_to_dbus(self.last_approval_request)

1601

1179

1602

1180

# Timeout - property

1603

@dbus_service_property(_interface,

1604

signature="t",

1181

@dbus_service_property(_interface, signature="t",

1605

1182

access="readwrite")

1606

1183

def Timeout_dbus_property(self, value=None):

1607

1184

if value is None: # get

1608

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

1609

old_timeout = self.timeout

1185

return dbus.UInt64(self.timeout_milliseconds())

1610

1186

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

1611

# Reschedule disabling

1612

if self.enabled:

1613

now = datetime.datetime.utcnow()

1614

self.expires += self.timeout - old_timeout

1615

if self.expires <= now:

1616

# The timeout has passed

1617

self.disable()

1618

else:

1619

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

1620

is None):

1621

return

1622

gobject.source_remove(self.disable_initiator_tag)

1623

self.disable_initiator_tag = gobject.timeout_add(

1624

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

1625

self.disable)

1187

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

1188

return

1189

# Reschedule timeout

1190

gobject.source_remove(self.disable_initiator_tag)

1191

self.disable_initiator_tag = None

1192

self.expires = None

1193

time_to_die = _timedelta_to_milliseconds((self

1194

.last_checked_ok

1195

+ self.timeout)

1196

- datetime.datetime

1197

.utcnow())

1198

if time_to_die <= 0:

1199

# The timeout has passed

1200

self.disable()

1201

else:

1202

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

1203

+ datetime.timedelta(milliseconds =

1204

time_to_die))

1205

self.disable_initiator_tag = (gobject.timeout_add

1206

(time_to_die, self.disable))

1626

1207

1627

1208

# ExtendedTimeout - property

1628

@dbus_service_property(_interface,

1629

signature="t",

1209

@dbus_service_property(_interface, signature="t",

1630

1210

access="readwrite")

1631

1211

def ExtendedTimeout_dbus_property(self, value=None):

1632

1212

if value is None: # get

1633

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

1634

* 1000)

1213

return dbus.UInt64(self.extended_timeout_milliseconds())

1635

1214

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

1636

1215

1637

1216

# Interval - property

1638

@dbus_service_property(_interface,

1639

signature="t",

1217

@dbus_service_property(_interface, signature="t",

1640

1218

access="readwrite")

1641

1219

def Interval_dbus_property(self, value=None):

1642

1220

if value is None: # get

1643

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

1221

return dbus.UInt64(self.interval_milliseconds())

1644

1222

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

1645

1223

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

1646

1224

return

1647

if self.enabled:

1648

# Reschedule checker run

1649

gobject.source_remove(self.checker_initiator_tag)

1650

self.checker_initiator_tag = gobject.timeout_add(

1651

value, self.start_checker)

1652

self.start_checker() # Start one now, too

1225

# Reschedule checker run

1226

gobject.source_remove(self.checker_initiator_tag)

1227

self.checker_initiator_tag = (gobject.timeout_add

1228

(value, self.start_checker))

1229

self.start_checker() # Start one now, too

1653

1230

1654

1231

# Checker - property

1655

@dbus_service_property(_interface,

1656

signature="s",

1232

@dbus_service_property(_interface, signature="s",

1657

1233

access="readwrite")

1658

1234

def Checker_dbus_property(self, value=None):

1659

1235

if value is None: # get

1660

1236

return dbus.String(self.checker_command)

1661

self.checker_command = str(value)

1237

self.checker_command = value

1662

1238

1663

1239

# CheckerRunning - property

1664

@dbus_service_property(_interface,

1665

signature="b",

1240

@dbus_service_property(_interface, signature="b",

1666

1241

access="readwrite")

1667

1242

def CheckerRunning_dbus_property(self, value=None):

1668

1243

if value is None: # get

1673

1248

self.stop_checker()

1674

1249

1675

1250

# ObjectPath - property

1676

@dbus_annotations(

1677

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1678

1251

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

1679

1252

def ObjectPath_dbus_property(self):

1680

1253

return self.dbus_object_path # is already a dbus.ObjectPath

1681

1254

1682

1255

# Secret = property

1683

@dbus_annotations(

1684

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

1685

"invalidates"})

1686

@dbus_service_property(_interface,

1687

signature="ay",

1688

access="write",

1689

byte_arrays=True)

1256

@dbus_service_property(_interface, signature="ay",

1257

access="write", byte_arrays=True)

1690

1258

def Secret_dbus_property(self, value):

1691

self.secret = bytes(value)

1259

self.secret = str(value)

1692

1260

1693

1261

del _interface

1694

1262

1698

1266

self._pipe = child_pipe

1699

1267

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

1700

1268

if not self._pipe.recv():

1701

raise KeyError(fpr)

1269

raise KeyError()

1702

1270

1703

1271

def __getattribute__(self, name):

1704

if name == '_pipe':

1272

if(name == '_pipe'):

1705

1273

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

1706

1274

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

1707

1275

data = self._pipe.recv()

1708

1276

if data[0] == 'data':

1709

1277

return data[1]

1710

1278

if data[0] == 'function':

1711

1712

1279

def func(*args, **kwargs):

1713

1280

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

1714

1281

return self._pipe.recv()[1]

1715

1716

1282

return func

1717

1283

1718

1284

def __setattr__(self, name, value):

1719

if name == '_pipe':

1285

if(name == '_pipe'):

1720

1286

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

1721

1287

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

1722

1288

1289

class ClientDBusTransitional(ClientDBus):

1290

__metaclass__ = AlternateDBusNamesMetaclass

1723

1291

1724

1292

class ClientHandler(socketserver.BaseRequestHandler, object):

1725

1293

"""A class to handle client connections.

1730

1298

def handle(self):

1731

1299

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

1732

1300

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

1733

str(self.client_address))

1301

unicode(self.client_address))

1734

1302

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

1735

1303

self.server.child_pipe.fileno())

1736

1304

1737

session = gnutls.connection.ClientSession(

1738

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

1305

session = (gnutls.connection

1306

.ClientSession(self.request,

1307

gnutls.connection

1308

.X509Credentials()))

1739

1309

1740

1310

# Note: gnutls.connection.X509Credentials is really a

1741

1311

# generic GnuTLS certificate credentials object so long as

1750

1320

priority = self.server.gnutls_priority

1751

1321

if priority is None:

1752

1322

priority = "NORMAL"

1753

gnutls.library.functions.gnutls_priority_set_direct(

1754

session._c_object, priority, None)

1323

(gnutls.library.functions

1324

.gnutls_priority_set_direct(session._c_object,

1325

priority, None))

1755

1326

1756

1327

# Start communication using the Mandos protocol

1757

1328

# Get protocol number

1759

1330

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

1760

1331

try:

1761

1332

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

1762

raise RuntimeError(line)

1333

raise RuntimeError

1763

1334

except (ValueError, IndexError, RuntimeError) as error:

1764

1335

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

1765

1336

return

1777

1348

approval_required = False

1778

1349

try:

1779

1350

try:

1780

fpr = self.fingerprint(

1781

self.peer_certificate(session))

1351

fpr = self.fingerprint(self.peer_certificate

1352

(session))

1782

1353

except (TypeError,

1783

1354

gnutls.errors.GNUTLSError) as error:

1784

1355

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

1799

1370

while True:

1800

1371

if not client.enabled:

1801

1372

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

1802

client.name)

1373

client.name)

1803

1374

if self.server.use_dbus:

1804

1375

# Emit D-Bus signal

1805

1376

client.Rejected("Disabled")

1806

1377

return

1807

1378

1808

if client.approved or not client.approval_delay:

1379

if client._approved or not client.approval_delay:

1809

1380

#We are approved or approval is disabled

1810

1381

break

1811

elif client.approved is None:

1382

elif client._approved is None:

1812

1383

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

1813

1384

client.name)

1814

1385

if self.server.use_dbus:

1815

1386

# Emit D-Bus signal

1816

1387

client.NeedApproval(

1817

client.approval_delay.total_seconds()

1818

* 1000, client.approved_by_default)

1388

client.approval_delay_milliseconds(),

1389

client.approved_by_default)

1819

1390

else:

1820

1391

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

1821

1392

client.name)

1827

1398

#wait until timeout or approved

1828

1399

time = datetime.datetime.now()

1829

1400

client.changedstate.acquire()

1830

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

1401

(client.changedstate.wait

1402

(float(client._timedelta_to_milliseconds(delay)

1403

/ 1000)))

1831

1404

client.changedstate.release()

1832

1405

time2 = datetime.datetime.now()

1833

1406

if (time2 - time) >= delay:

1849

1422

try:

1850

1423

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

1851

1424

except gnutls.errors.GNUTLSError as error:

1852

logger.warning("gnutls send failed",

1853

exc_info=error)

1425

logger.warning("gnutls send failed")

1854

1426

return

1855

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

1856

len(client.secret) - (sent_size

1857

+ sent))

1427

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

1428

sent, len(client.secret)

1429

- (sent_size + sent))

1858

1430

sent_size += sent

1859

1431

1860

1432

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

1861

1433

# bump the timeout using extended_timeout

1862

client.bump_timeout(client.extended_timeout)

1434

client.checked_ok(client.extended_timeout)

1863

1435

if self.server.use_dbus:

1864

1436

# Emit D-Bus signal

1865

1437

client.GotSecret()

1870

1442

try:

1871

1443

session.bye()

1872

1444

except gnutls.errors.GNUTLSError as error:

1873

logger.warning("GnuTLS bye failed",

1874

exc_info=error)

1445

logger.warning("GnuTLS bye failed")

1875

1446

1876

1447

@staticmethod

1877

1448

def peer_certificate(session):

1878

1449

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

1879

1450

# If not an OpenPGP certificate...

1880

if (gnutls.library.functions.gnutls_certificate_type_get(

1881

session._c_object)

1451

if (gnutls.library.functions

1452

.gnutls_certificate_type_get(session._c_object)

1882

1453

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1883

1454

# ...do the normal thing

1884

1455

return session.peer_certificate

1898

1469

def fingerprint(openpgp):

1899

1470

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1900

1471

# New GnuTLS "datum" with the OpenPGP public key

1901

datum = gnutls.library.types.gnutls_datum_t(

1902

ctypes.cast(ctypes.c_char_p(openpgp),

1903

ctypes.POINTER(ctypes.c_ubyte)),

1904

ctypes.c_uint(len(openpgp)))

1472

datum = (gnutls.library.types

1473

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

1474

ctypes.POINTER

1475

(ctypes.c_ubyte)),

1476

ctypes.c_uint(len(openpgp))))

1905

1477

# New empty GnuTLS certificate

1906

1478

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1907

gnutls.library.functions.gnutls_openpgp_crt_init(

1908

ctypes.byref(crt))

1479

(gnutls.library.functions

1480

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

1909

1481

# Import the OpenPGP public key into the certificate

1910

gnutls.library.functions.gnutls_openpgp_crt_import(

1911

crt, ctypes.byref(datum),

1912

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

1482

(gnutls.library.functions

1483

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

1484

gnutls.library.constants

1485

.GNUTLS_OPENPGP_FMT_RAW))

1913

1486

# Verify the self signature in the key

1914

1487

crtverify = ctypes.c_uint()

1915

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1916

crt, 0, ctypes.byref(crtverify))

1488

(gnutls.library.functions

1489

.gnutls_openpgp_crt_verify_self(crt, 0,

1490

ctypes.byref(crtverify)))

1917

1491

if crtverify.value != 0:

1918

1492

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1919

raise gnutls.errors.CertificateSecurityError(

1920

"Verify failed")

1493

raise (gnutls.errors.CertificateSecurityError

1494

("Verify failed"))

1921

1495

# New buffer for the fingerprint

1922

1496

buf = ctypes.create_string_buffer(20)

1923

1497

buf_len = ctypes.c_size_t()

1924

1498

# Get the fingerprint from the certificate into the buffer

1925

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1926

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

1499

(gnutls.library.functions

1500

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

1501

ctypes.byref(buf_len)))

1927

1502

# Deinit the certificate

1928

1503

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1929

1504

# Convert the buffer to a Python bytestring

1930

1505

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

1931

1506

# Convert the bytestring to hexadecimal notation

1932

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

1507

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

1933

1508

return hex_fpr

1934

1509

1935

1510

1936

1511

class MultiprocessingMixIn(object):

1937

1512

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

1938

1939

1513

def sub_process_main(self, request, address):

1940

1514

try:

1941

1515

self.finish_request(request, address)

1942

except Exception:

1516

except:

1943

1517

self.handle_error(request, address)

1944

1518

self.close_request(request)

1945

1519

1946

1520

def process_request(self, request, address):

1947

1521

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

1948

1522

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

1949

args = (request, address))

1523

args = (request,

1524

address))

1950

1525

proc.start()

1951

1526

return proc

1952

1527

1953

1528

1954

1529

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1955

1530

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

1956

1957

1531

def process_request(self, request, client_address):

1958

1532

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

1959

1533

1968

1542

1969

1543

def add_pipe(self, parent_pipe, proc):

1970

1544

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

1971

raise NotImplementedError()

1545

raise NotImplementedError

1972

1546

1973

1547

1974

1548

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1980

1554

interface: None or a network interface name (string)

1981

1555

use_ipv6: Boolean; to use IPv6 or not

1982

1556

"""

1983

1984

1557

def __init__(self, server_address, RequestHandlerClass,

1985

interface=None,

1986

use_ipv6=True,

1987

socketfd=None):

1988

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

1989

creating a new one with socket.socket().

1990

"""

1558

interface=None, use_ipv6=True):

1991

1559

self.interface = interface

1992

1560

if use_ipv6:

1993

1561

self.address_family = socket.AF_INET6

1994

if socketfd is not None:

1995

# Save the file descriptor

1996

self.socketfd = socketfd

1997

# Save the original socket.socket() function

1998

self.socket_socket = socket.socket

1999

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

2000

#

2001

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

2002

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

2003

# patching socket.socket.)

2004

#

2005

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

2006

@functools.wraps(socket.socket)

2007

def socket_wrapper(*args, **kwargs):

2008

# Restore original function so subsequent calls are

2009

# not affected.

2010

socket.socket = self.socket_socket

2011

del self.socket_socket

2012

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

2013

# saved file descriptor.

2014

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

2015

# Replace socket.socket() function with wrapper

2016

socket.socket = socket_wrapper

2017

# The socketserver.TCPServer.__init__ will call

2018

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

2019

# socket_wrapper(), if socketfd was set.

2020

1562

socketserver.TCPServer.__init__(self, server_address,

2021

1563

RequestHandlerClass)

2022

2023

1564

def server_bind(self):

2024

1565

"""This overrides the normal server_bind() function

2025

1566

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

2031

1572

self.interface)

2032

1573

else:

2033

1574

try:

2034

self.socket.setsockopt(

2035

socket.SOL_SOCKET, SO_BINDTODEVICE,

2036

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

1575

self.socket.setsockopt(socket.SOL_SOCKET,

1576

SO_BINDTODEVICE,

1577

str(self.interface

1578

+ '\0'))

2037

1579

except socket.error as error:

2038

if error.errno == errno.EPERM:

2039

logger.error("No permission to bind to"

2040

" interface %s", self.interface)

2041

elif error.errno == errno.ENOPROTOOPT:

1580

if error[0] == errno.EPERM:

1581

logger.error("No permission to"

1582

" bind to interface %s",

1583

self.interface)

1584

elif error[0] == errno.ENOPROTOOPT:

2042

1585

logger.error("SO_BINDTODEVICE not available;"

2043

1586

" cannot bind to interface %s",

2044

1587

self.interface)

2045

elif error.errno == errno.ENODEV:

2046

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

2047

" cannot bind", self.interface)

2048

1588

else:

2049

1589

raise

2050

1590

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

2053

1593

if self.address_family == socket.AF_INET6:

2054

1594

any_address = "::" # in6addr_any

2055

1595

else:

2056

any_address = "0.0.0.0" # INADDR_ANY

1596

any_address = socket.INADDR_ANY

2057

1597

self.server_address = (any_address,

2058

1598

self.server_address[1])

2059

1599

elif not self.server_address[1]:

2060

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

1600

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

1601

0)

2061

1602

# if self.interface:

2062

1603

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

2063

1604

# 0, # port

2077

1618

2078

1619

Assumes a gobject.MainLoop event loop.

2079

1620

"""

2080

2081

1621

def __init__(self, server_address, RequestHandlerClass,

2082

interface=None,

2083

use_ipv6=True,

2084

clients=None,

2085

gnutls_priority=None,

2086

use_dbus=True,

2087

socketfd=None):

1622

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

1623

gnutls_priority=None, use_dbus=True):

2088

1624

self.enabled = False

2089

1625

self.clients = clients

2090

1626

if self.clients is None:

2091

self.clients = {}

1627

self.clients = set()

2092

1628

self.use_dbus = use_dbus

2093

1629

self.gnutls_priority = gnutls_priority

2094

1630

IPv6_TCPServer.__init__(self, server_address,

2095

1631

RequestHandlerClass,

2096

1632

interface = interface,

2097

use_ipv6 = use_ipv6,

2098

socketfd = socketfd)

2099

1633

use_ipv6 = use_ipv6)

2100

1634

def server_activate(self):

2101

1635

if self.enabled:

2102

1636

return socketserver.TCPServer.server_activate(self)

2106

1640

2107

1641

def add_pipe(self, parent_pipe, proc):

2108

1642

# Call "handle_ipc" for both data and EOF events

2109

gobject.io_add_watch(

2110

parent_pipe.fileno(),

2111

gobject.IO_IN | gobject.IO_HUP,

2112

functools.partial(self.handle_ipc,

2113

parent_pipe = parent_pipe,

2114

proc = proc))

1643

gobject.io_add_watch(parent_pipe.fileno(),

1644

gobject.IO_IN | gobject.IO_HUP,

1645

functools.partial(self.handle_ipc,

1646

parent_pipe =

1647

parent_pipe,

1648

proc = proc))

2115

1649

2116

def handle_ipc(self, source, condition,

2117

parent_pipe=None,

2118

proc = None,

2119

client_object=None):

1650

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

1651

proc = None, client_object=None):

1652

condition_names = {

1653

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

1654

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

1655

# blocking).

1656

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

1657

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

1658

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

1659

# broken, usually for pipes and

1660

# sockets).

1661

}

1662

conditions_string = ' | '.join(name

1663

for cond, name in

1664

condition_names.iteritems()

1665

if cond & condition)

2120

1666

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

2121

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

1667

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

2122

1668

# Wait for other process to exit

2123

1669

proc.join()

2124

1670

return False

2131

1677

fpr = request[1]

2132

1678

address = request[2]

2133

1679

2134

for c in self.clients.itervalues():

1680

for c in self.clients:

2135

1681

if c.fingerprint == fpr:

2136

1682

client = c

2137

1683

break

2145

1691

parent_pipe.send(False)

2146

1692

return False

2147

1693

2148

gobject.io_add_watch(

2149

parent_pipe.fileno(),

2150

gobject.IO_IN | gobject.IO_HUP,

2151

functools.partial(self.handle_ipc,

2152

parent_pipe = parent_pipe,

2153

proc = proc,

2154

client_object = client))

1694

gobject.io_add_watch(parent_pipe.fileno(),

1695

gobject.IO_IN | gobject.IO_HUP,

1696

functools.partial(self.handle_ipc,

1697

parent_pipe =

1698

parent_pipe,

1699

proc = proc,

1700

client_object =

1701

client))

2155

1702

parent_pipe.send(True)

2156

1703

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

2157

1704

# same fileno

2163

1710

2164

1711

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

2165

1712

funcname)(*args,

2166

**kwargs)))

1713

**kwargs)))

2167

1714

2168

1715

if command == 'getattr':

2169

1716

attrname = request[1]

2170

if isinstance(client_object.__getattribute__(attrname),

2171

collections.Callable):

2172

parent_pipe.send(('function', ))

1717

if callable(client_object.__getattribute__(attrname)):

1718

parent_pipe.send(('function',))

2173

1719

else:

2174

parent_pipe.send((

2175

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

1720

parent_pipe.send(('data', client_object

1721

.__getattribute__(attrname)))

2176

1722

2177

1723

if command == 'setattr':

2178

1724

attrname = request[1]

2182

1728

return True

2183

1729

2184

1730

2185

def rfc3339_duration_to_delta(duration):

2186

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

2187

2188

>>> rfc3339_duration_to_delta("P7D")

2189

datetime.timedelta(7)

2190

>>> rfc3339_duration_to_delta("PT60S")

2191

datetime.timedelta(0, 60)

2192

>>> rfc3339_duration_to_delta("PT60M")

2193

datetime.timedelta(0, 3600)

2194

>>> rfc3339_duration_to_delta("PT24H")

2195

datetime.timedelta(1)

2196

>>> rfc3339_duration_to_delta("P1W")

2197

datetime.timedelta(7)

2198

>>> rfc3339_duration_to_delta("PT5M30S")

2199

datetime.timedelta(0, 330)

2200

>>> rfc3339_duration_to_delta("P1DT3M20S")

2201

datetime.timedelta(1, 200)

2202

"""

2203

2204

# Parsing an RFC 3339 duration with regular expressions is not

2205

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

2206

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

2207

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

2208

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

2209

# avoid excessive use of external libraries.

2210

2211

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

2212

Token = collections.namedtuple("Token", (

2213

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

2214

# a "group" containing digits

2215

"value", # datetime.timedelta or None

2216

"followers")) # Tokens valid after this token

2217

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

2218

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

2219

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

2220

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

2221

datetime.timedelta(seconds=1),

2222

frozenset((token_end, )))

2223

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

2224

datetime.timedelta(minutes=1),

2225

frozenset((token_second, token_end)))

2226

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

2227

datetime.timedelta(hours=1),

2228

frozenset((token_minute, token_end)))

2229

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

2230

None,

2231

frozenset((token_hour, token_minute,

2232

token_second)))

2233

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

2234

datetime.timedelta(days=1),

2235

frozenset((token_time, token_end)))

2236

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

2237

datetime.timedelta(weeks=4),

2238

frozenset((token_day, token_end)))

2239

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

2240

datetime.timedelta(weeks=52),

2241

frozenset((token_month, token_end)))

2242

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

2243

datetime.timedelta(weeks=1),

2244

frozenset((token_end, )))

2245

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

2246

frozenset((token_year, token_month,

2247

token_day, token_time,

2248

token_week)))

2249

# Define starting values

2250

value = datetime.timedelta() # Value so far

2251

found_token = None

2252

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

2253

s = duration # String left to parse

2254

# Loop until end token is found

2255

while found_token is not token_end:

2256

# Search for any currently valid tokens

2257

for token in followers:

2258

match = token.regexp.match(s)

2259

if match is not None:

2260

# Token found

2261

if token.value is not None:

2262

# Value found, parse digits

2263

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

2264

# Add to value so far

2265

value += factor * token.value

2266

# Strip token from string

2267

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

2268

# Go to found token

2269

found_token = token

2270

# Set valid next tokens

2271

followers = found_token.followers

2272

break

2273

else:

2274

# No currently valid tokens were found

2275

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

2276

.format(duration))

2277

# End token found

2278

return value

2279

2280

2281

1731

def string_to_delta(interval):

2282

1732

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

2283

1733

2294

1744

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

2295

1745

datetime.timedelta(0, 330)

2296

1746

"""

2297

2298

try:

2299

return rfc3339_duration_to_delta(interval)

2300

except ValueError:

2301

pass

2302

2303

1747

timevalue = datetime.timedelta(0)

2304

1748

for s in interval.split():

2305

1749

try:

2306

suffix = s[-1]

1750

suffix = unicode(s[-1])

2307

1751

value = int(s[:-1])

2308

1752

if suffix == "d":

2309

1753

delta = datetime.timedelta(value)

2316

1760

elif suffix == "w":

2317

1761

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

2318

1762

else:

2319

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

2320

except IndexError as e:

1763

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

1764

except (ValueError, IndexError) as e:

2321

1765

raise ValueError(*(e.args))

2322

1766

timevalue += delta

2323

1767

return timevalue

2324

1768

2325

1769

1770

def if_nametoindex(interface):

1771

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

1772

1773

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

1774

global if_nametoindex

1775

try:

1776

if_nametoindex = (ctypes.cdll.LoadLibrary

1777

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

1778

.if_nametoindex)

1779

except (OSError, AttributeError):

1780

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

1781

def if_nametoindex(interface):

1782

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

1783

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

1784

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

1785

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1786

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

1787

interface))

1788

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

1789

ifreq[16:20])[0]

1790

return interface_index

1791

return if_nametoindex(interface)

1792

1793

2326

1794

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

2327

1795

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

2328

1796

2336

1804

sys.exit()

2337

1805

if not noclose:

2338

1806

# Close all standard open file descriptors

2339

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

1807

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

2340

1808

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

2341

1809

raise OSError(errno.ENODEV,

2342

"{} not a character device"

2343

.format(os.devnull))

1810

"%s not a character device"

1811

% os.path.devnull)

2344

1812

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

2345

1813

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

2346

1814

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

2355

1823

2356

1824

parser = argparse.ArgumentParser()

2357

1825

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

2358

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

1826

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

2359

1827

help="show version number and exit")

2360

1828

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

2361

1829

help="Bind to interface IF")

2367

1835

help="Run self-test")

2368

1836

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

2369

1837

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

2370

" to terminal", default=None)

1838

" to terminal")

2371

1839

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

2372

1840

help="Debug level for stdout output")

2373

1841

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

2380

1848

" files")

2381

1849

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

2382

1850

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

2383

" system bus interface", default=None)

1851

" system bus interface")

2384

1852

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

2385

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

2386

default=None)

2387

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

2388

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

2389

" state", default=None)

2390

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

2391

help="Specify a file descriptor to a network"

2392

" socket to use instead of creating one")

2393

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

2394

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

2395

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

2396

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

2397

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

2398

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

2399

default=None)

2400

1853

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

2401

1854

options = parser.parse_args()

2402

1855

2403

1856

if options.check:

2404

1857

import doctest

2405

fail_count, test_count = doctest.testmod()

2406

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

1858

doctest.testmod()

1859

sys.exit()

2407

1860

2408

1861

# Default values for config file for server-global settings

2409

1862

server_defaults = { "interface": "",

2411

1864

"port": "",

2412

1865

"debug": "False",

2413

1866

"priority":

2414

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

2415

":+SIGN-DSA-SHA256",

1867

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

2416

1868

"servicename": "Mandos",

2417

1869

"use_dbus": "True",

2418

1870

"use_ipv6": "True",

2419

1871

"debuglevel": "",

2420

"restore": "True",

2421

"socket": "",

2422

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

2423

"foreground": "False",

2424

"zeroconf": "True",

2425

}

1872

}

2426

1873

2427

1874

# Parse config file for server-global settings

2428

1875

server_config = configparser.SafeConfigParser(server_defaults)

2429

1876

del server_defaults

2430

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

1877

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

1878

"mandos.conf"))

2431

1879

# Convert the SafeConfigParser object to a dict

2432

1880

server_settings = server_config.defaults()

2433

1881

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

2434

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

1882

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

2435

1883

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

2436

1884

option)

2437

1885

if server_settings["port"]:

2438

1886

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

2439

1887

"port")

2440

if server_settings["socket"]:

2441

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

2442

"socket")

2443

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

2444

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

2445

# happen with a supplied network socket.

2446

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

2447

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

2448

["socket"])

2449

1888

del server_config

2450

1889

2451

1890

# Override the settings from the config file with command line

2452

1891

# options, if set.

2453

1892

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

2454

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

2455

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

2456

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

1893

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

1894

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

2457

1895

value = getattr(options, option)

2458

1896

if value is not None:

2459

1897

server_settings[option] = value

2460

1898

del options

2461

1899

# Force all strings to be unicode

2462

1900

for option in server_settings.keys():

2463

if isinstance(server_settings[option], bytes):

2464

server_settings[option] = (server_settings[option]

2465

.decode("utf-8"))

2466

# Force all boolean options to be boolean

2467

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

2468

"foreground", "zeroconf"):

2469

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

2470

# Debug implies foreground

2471

if server_settings["debug"]:

2472

server_settings["foreground"] = True

1901

if type(server_settings[option]) is str:

1902

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

2473

1903

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

2474

1904

2475

1905

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

2476

1906

2477

if (not server_settings["zeroconf"]

2478

and not (server_settings["port"]

2479

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

2480

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

2481

2482

1907

# For convenience

2483

1908

debug = server_settings["debug"]

2484

1909

debuglevel = server_settings["debuglevel"]

2485

1910

use_dbus = server_settings["use_dbus"]

2486

1911

use_ipv6 = server_settings["use_ipv6"]

2487

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

2488

stored_state_file)

2489

foreground = server_settings["foreground"]

2490

zeroconf = server_settings["zeroconf"]

2491

2492

if debug:

2493

initlogger(debug, logging.DEBUG)

2494

else:

2495

if not debuglevel:

2496

initlogger(debug)

2497

else:

2498

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

2499

initlogger(debug, level)

2500

1912

2501

1913

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

2502

syslogger.setFormatter(

2503

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

2504

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

2505

server_settings["servicename"])))

1914

syslogger.setFormatter(logging.Formatter

1915

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

1916

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

1917

% server_settings["servicename"]))

2506

1918

2507

1919

# Parse config file with clients

2508

client_config = configparser.SafeConfigParser(Client

2509

.client_defaults)

1920

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

1921

"extended_timeout": "15m",

1922

"interval": "2m",

1923

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

1924

"host": "",

1925

"approval_delay": "0s",

1926

"approval_duration": "1s",

1927

}

1928

client_config = configparser.SafeConfigParser(client_defaults)

2510

1929

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

2511

1930

"clients.conf"))

2512

1931

2513

1932

global mandos_dbus_service

2514

1933

mandos_dbus_service = None

2515

1934

2516

socketfd = None

2517

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

2518

socketfd = server_settings["socket"]

2519

tcp_server = MandosServer(

2520

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

2521

ClientHandler,

2522

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

2523

use_ipv6=use_ipv6,

2524

gnutls_priority=server_settings["priority"],

2525

use_dbus=use_dbus,

2526

socketfd=socketfd)

2527

if not foreground:

2528

pidfilename = "/run/mandos.pid"

2529

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

2530

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

2531

pidfile = None

1935

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

1936

server_settings["port"]),

1937

ClientHandler,

1938

interface=(server_settings["interface"]

1939

or None),

1940

use_ipv6=use_ipv6,

1941

gnutls_priority=

1942

server_settings["priority"],

1943

use_dbus=use_dbus)

1944

if not debug:

1945

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

2532

1946

try:

2533

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

2534

except IOError as e:

2535

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

2536

exc_info=e)

1947

pidfile = open(pidfilename, "w")

1948

except IOError:

1949

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

2537

1950

2538

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

1951

try:

1952

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

1953

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

1954

except KeyError:

2539

1955

try:

2540

uid = pwd.getpwnam(name).pw_uid

2541

gid = pwd.getpwnam(name).pw_gid

2542

break

1956

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

1957

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

2543

1958

except KeyError:

2544

continue

2545

else:

2546

uid = 65534

2547

gid = 65534

1959

try:

1960

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

1961

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

1962

except KeyError:

1963

uid = 65534

1964

gid = 65534

2548

1965

try:

2549

1966

os.setgid(gid)

2550

1967

os.setuid(uid)

2551

1968

except OSError as error:

2552

if error.errno != errno.EPERM:

2553

raise

1969

if error[0] != errno.EPERM:

1970

raise error

1971

1972

if not debug and not debuglevel:

1973

syslogger.setLevel(logging.WARNING)

1974

console.setLevel(logging.WARNING)

1975

if debuglevel:

1976

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

1977

syslogger.setLevel(level)

1978

console.setLevel(level)

2554

1979

2555

1980

if debug:

2556

1981

# Enable all possible GnuTLS debugging

2563

1988

def debug_gnutls(level, string):

2564

1989

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

2565

1990

2566

gnutls.library.functions.gnutls_global_set_log_function(

2567

debug_gnutls)

1991

(gnutls.library.functions

1992

.gnutls_global_set_log_function(debug_gnutls))

2568

1993

2569

1994

# Redirect stdin so all checkers get /dev/null

2570

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

1995

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

2571

1996

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

2572

1997

if null > 2:

2573

1998

os.close(null)

1999

else:

2000

# No console logging

2001

logger.removeHandler(console)

2574

2002

2575

2003

# Need to fork before connecting to D-Bus

2576

if not foreground:

2004

if not debug:

2577

2005

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

2578

2006

daemon()

2579

2007

2580

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

2581

# need to inform gobject that threads will be used.

2582

gobject.threads_init()

2583

2584

2008

global main_loop

2585

2009

# From the Avahi example code

2586

DBusGMainLoop(set_as_default=True)

2010

DBusGMainLoop(set_as_default=True )

2587

2011

main_loop = gobject.MainLoop()

2588

2012

bus = dbus.SystemBus()

2589

2013

# End of Avahi example code

2590

2014

if use_dbus:

2591

2015

try:

2592

2016

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

2593

bus,

2594

do_not_queue=True)

2595

old_bus_name = dbus.service.BusName(

2596

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

2597

do_not_queue=True)

2598

except dbus.exceptions.DBusException as e:

2599

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

2017

bus, do_not_queue=True)

2018

old_bus_name = (dbus.service.BusName

2019

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

2020

do_not_queue=True))

2021

except dbus.exceptions.NameExistsException as e:

2022

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

2600

2023

use_dbus = False

2601

2024

server_settings["use_dbus"] = False

2602

2025

tcp_server.use_dbus = False

2603

if zeroconf:

2604

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2605

service = AvahiServiceToSyslog(

2606

name = server_settings["servicename"],

2607

servicetype = "_mandos._tcp",

2608

protocol = protocol,

2609

bus = bus)

2610

if server_settings["interface"]:

2611

service.interface = if_nametoindex(

2612

server_settings["interface"].encode("utf-8"))

2026

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2027

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

2028

servicetype = "_mandos._tcp",

2029

protocol = protocol, bus = bus)

2030

if server_settings["interface"]:

2031

service.interface = (if_nametoindex

2032

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

2613

2033

2614

2034

global multiprocessing_manager

2615

2035

multiprocessing_manager = multiprocessing.Manager()

2616

2036

2617

2037

client_class = Client

2618

2038

if use_dbus:

2619

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

2620

2621

client_settings = Client.config_parser(client_config)

2622

old_client_settings = {}

2623

clients_data = {}

2624

2625

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

2626

global wnull

2627

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

2628

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

2629

# mode

2630

if debug or not foreground:

2631

wnull.close()

2632

2633

# Get client data and settings from last running state.

2634

if server_settings["restore"]:

2635

try:

2636

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

2637

clients_data, old_client_settings = pickle.load(

2638

stored_state)

2639

os.remove(stored_state_path)

2640

except IOError as e:

2641

if e.errno == errno.ENOENT:

2642

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

2643

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

2644

else:

2645

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

2646

exc_info=e)

2647

raise

2648

except EOFError as e:

2649

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

2650

"EOFError:",

2651

exc_info=e)

2652

2653

with PGPEngine() as pgp:

2654

for client_name, client in clients_data.items():

2655

# Skip removed clients

2656

if client_name not in client_settings:

2657

continue

2658

2659

# Decide which value to use after restoring saved state.

2660

# We have three different values: Old config file,

2661

# new config file, and saved state.

2662

# New config value takes precedence if it differs from old

2663

# config value, otherwise use saved state.

2664

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

2665

try:

2666

# For each value in new config, check if it

2667

# differs from the old config value (Except for

2668

# the "secret" attribute)

2669

if (name != "secret"

2670

and (value !=

2671

old_client_settings[client_name][name])):

2672

client[name] = value

2673

except KeyError:

2674

pass

2675

2676

# Clients who has passed its expire date can still be

2677

# enabled if its last checker was successful. A Client

2678

# whose checker succeeded before we stored its state is

2679

# assumed to have successfully run all checkers during

2680

# downtime.

2681

if client["enabled"]:

2682

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

2683

if not client["last_checked_ok"]:

2684

logger.warning(

2685

"disabling client {} - Client never "

2686

"performed a successful checker".format(

2687

client_name))

2688

client["enabled"] = False

2689

elif client["last_checker_status"] != 0:

2690

logger.warning(

2691

"disabling client {} - Client last"

2692

" checker failed with error code"

2693

" {}".format(

2694

client_name,

2695

client["last_checker_status"]))

2696

client["enabled"] = False

2697

else:

2698

client["expires"] = (

2699

datetime.datetime.utcnow()

2700

+ client["timeout"])

2701

logger.debug("Last checker succeeded,"

2702

" keeping {} enabled".format(

2703

client_name))

2039

client_class = functools.partial(ClientDBusTransitional,

2040

bus = bus)

2041

def client_config_items(config, section):

2042

special_settings = {

2043

"approved_by_default":

2044

lambda: config.getboolean(section,

2045

"approved_by_default"),

2046

}

2047

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

2704

2048

try:

2705

client["secret"] = pgp.decrypt(

2706

client["encrypted_secret"],

2707

client_settings[client_name]["secret"])

2708

except PGPError:

2709

# If decryption fails, we use secret from new settings

2710

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

2711

client_name))

2712

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

2713

["secret"])

2714

2715

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

2716

for client_name in (set(old_client_settings)

2717

- set(client_settings)):

2718

del clients_data[client_name]

2719

for client_name in (set(client_settings)

2720

- set(old_client_settings)):

2721

clients_data[client_name] = client_settings[client_name]

2722

2723

# Create all client objects

2724

for client_name, client in clients_data.items():

2725

tcp_server.clients[client_name] = client_class(

2726

name = client_name,

2727

settings = client,

2728

server_settings = server_settings)

2729

2049

yield (name, special_settings[name]())

2050

except KeyError:

2051

yield (name, value)

2052

2053

tcp_server.clients.update(set(

2054

client_class(name = section,

2055

config= dict(client_config_items(

2056

client_config, section)))

2057

for section in client_config.sections()))

2730

2058

if not tcp_server.clients:

2731

2059

logger.warning("No clients defined")

2732

2733

if not foreground:

2734

if pidfile is not None:

2735

pid = os.getpid()

2736

try:

2737

with pidfile:

2738

print(pid, file=pidfile)

2739

except IOError:

2740

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

2741

pidfilename, pid)

2742

del pidfile

2060

2061

if not debug:

2062

try:

2063

with pidfile:

2064

pid = os.getpid()

2065

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

2066

del pidfile

2067

except IOError:

2068

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

2069

pidfilename, pid)

2070

except NameError:

2071

# "pidfile" was never created

2072

pass

2743

2073

del pidfilename

2074

2075

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

2744

2076

2745

2077

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

2746

2078

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

2747

2079

2748

2080

if use_dbus:

2749

2750

@alternate_dbus_interfaces(

2751

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

2752

class MandosDBusService(DBusObjectWithProperties):

2081

class MandosDBusService(dbus.service.Object):

2753

2082

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

2754

2755

2083

def __init__(self):

2756

2084

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

2757

2758

2085

_interface = "se.recompile.Mandos"

2759

2086

2760

@dbus_interface_annotations(_interface)

2761

def _foo(self):

2762

return {

2763

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

2764

"false" }

2765

2766

2087

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

2767

2088

def ClientAdded(self, objpath):

2768

2089

"D-Bus signal"

2781

2102

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

2782

2103

def GetAllClients(self):

2783

2104

"D-Bus method"

2784

return dbus.Array(c.dbus_object_path for c in

2785

tcp_server.clients.itervalues())

2105

return dbus.Array(c.dbus_object_path

2106

for c in tcp_server.clients)

2786

2107

2787

2108

@dbus.service.method(_interface,

2788

2109

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

2789

2110

def GetAllClientsWithProperties(self):

2790

2111

"D-Bus method"

2791

2112

return dbus.Dictionary(

2792

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

2793

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

2113

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

2114

for c in tcp_server.clients),

2794

2115

signature="oa{sv}")

2795

2116

2796

2117

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

2797

2118

def RemoveClient(self, object_path):

2798

2119

"D-Bus method"

2799

for c in tcp_server.clients.itervalues():

2120

for c in tcp_server.clients:

2800

2121

if c.dbus_object_path == object_path:

2801

del tcp_server.clients[c.name]

2122

tcp_server.clients.remove(c)

2802

2123

c.remove_from_connection()

2803

2124

# Don't signal anything except ClientRemoved

2804

2125

c.disable(quiet=True)

2809

2130

2810

2131

del _interface

2811

2132

2812

mandos_dbus_service = MandosDBusService()

2133

class MandosDBusServiceTransitional(MandosDBusService):

2134

__metaclass__ = AlternateDBusNamesMetaclass

2135

mandos_dbus_service = MandosDBusServiceTransitional()

2813

2136

2814

2137

def cleanup():

2815

2138

"Cleanup function; run on exit"

2816

if zeroconf:

2817

service.cleanup()

2139

service.cleanup()

2818

2140

2819

2141

multiprocessing.active_children()

2820

wnull.close()

2821

if not (tcp_server.clients or client_settings):

2822

return

2823

2824

# Store client before exiting. Secrets are encrypted with key

2825

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

2826

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

2827

clients = {}

2828

with PGPEngine() as pgp:

2829

for client in tcp_server.clients.itervalues():

2830

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

2831

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

2832

key)

2833

client_dict = {}

2834

2835

# A list of attributes that can not be pickled

2836

# + secret.

2837

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

2838

"checker", "server_settings" }

2839

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

2840

.Object):

2841

exclude.add(name)

2842

2843

client_dict["encrypted_secret"] = (client

2844

.encrypted_secret)

2845

for attr in client.client_structure:

2846

if attr not in exclude:

2847

client_dict[attr] = getattr(client, attr)

2848

2849

clients[client.name] = client_dict

2850

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

2851

2852

try:

2853

with tempfile.NamedTemporaryFile(

2854

mode='wb',

2855

suffix=".pickle",

2856

prefix='clients-',

2857

dir=os.path.dirname(stored_state_path),

2858

delete=False) as stored_state:

2859

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

2860

tempname = stored_state.name

2861

os.rename(tempname, stored_state_path)

2862

except (IOError, OSError) as e:

2863

if not debug:

2864

try:

2865

os.remove(tempname)

2866

except NameError:

2867

pass

2868

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

2869

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

2870

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

2871

else:

2872

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

2873

exc_info=e)

2874

raise

2875

2876

# Delete all clients, and settings from config

2877

2142

while tcp_server.clients:

2878

name, client = tcp_server.clients.popitem()

2143

client = tcp_server.clients.pop()

2879

2144

if use_dbus:

2880

2145

client.remove_from_connection()

2146

client.disable_hook = None

2881

2147

# Don't signal anything except ClientRemoved

2882

2148

client.disable(quiet=True)

2883

2149

if use_dbus:

2884

2150

# Emit D-Bus signal

2885

mandos_dbus_service.ClientRemoved(

2886

client.dbus_object_path, client.name)

2887

client_settings.clear()

2151

mandos_dbus_service.ClientRemoved(client

2152

.dbus_object_path,

2153

client.name)

2888

2154

2889

2155

atexit.register(cleanup)

2890

2156

2891

for client in tcp_server.clients.itervalues():

2157

for client in tcp_server.clients:

2892

2158

if use_dbus:

2893

2159

# Emit D-Bus signal

2894

2160

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2895

# Need to initiate checking of clients

2896

if client.enabled:

2897

client.init_checker()

2161

client.enable()

2898

2162

2899

2163

tcp_server.enable()

2900

2164

tcp_server.server_activate()

2901

2165

2902

2166

# Find out what port we got

2903

if zeroconf:

2904

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

2167

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

2905

2168

if use_ipv6:

2906

2169

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

2907

" flowinfo %d, scope_id %d",

2908

*tcp_server.socket.getsockname())

2170

" flowinfo %d, scope_id %d"

2171

% tcp_server.socket.getsockname())

2909

2172

else: # IPv4

2910

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

2911

*tcp_server.socket.getsockname())

2173

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

2174

% tcp_server.socket.getsockname())

2912

2175

2913

2176

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

2914

2177

2915

2178

try:

2916

if zeroconf:

2917

# From the Avahi example code

2918

try:

2919

service.activate()

2920

except dbus.exceptions.DBusException as error:

2921

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

2922

cleanup()

2923

sys.exit(1)

2924

# End of Avahi example code

2179

# From the Avahi example code

2180

try:

2181

service.activate()

2182

except dbus.exceptions.DBusException as error:

2183

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

2184

cleanup()

2185

sys.exit(1)

2186

# End of Avahi example code

2925

2187

2926

2188

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

2927

2189

lambda *args, **kwargs:

2931

2193

logger.debug("Starting main loop")

2932

2194

main_loop.run()

2933

2195

except AvahiError as error:

2934

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

2196

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

2935

2197

cleanup()

2936

2198

sys.exit(1)

2937

2199

except KeyboardInterrupt: