/mandos/trunk : revision 505.1.15

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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 = "1.4.0"

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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,

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dbus.exceptions.DBusException):

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dbus.exceptions.DBusException) as e:

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pass

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self.group = None

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self.remove()

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381

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

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

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

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bad_states = {

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avahi.SERVER_INVALID: "Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION: "Zeroconf server name collision",

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avahi.SERVER_FAILURE: "Zeroconf server failure",

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}

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bad_states = { avahi.SERVER_INVALID:

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"Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION:

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"Zeroconf server name collision",

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avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

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if state in bad_states:

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if bad_states[state] is not None:

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if error is None:

401

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

402

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else:

403

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

404

405

256

def activate(self):

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

407

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if self.server is None:

411

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follow_name_owner_changes=True),

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avahi.DBUS_INTERFACE_SERVER)

413

264

self.server.connect_to_signal("StateChanged",

414

self.server_state_changed)

265

self.server_state_changed)

415

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

416

267

417

268

418

class AvahiServiceToSyslog(AvahiService):

419

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

420

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

421

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

422

syslogger.setFormatter(logging.Formatter(

423

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

424

.format(self.name)))

425

return ret

426

427

def call_pipe(connection, # : multiprocessing.Connection

428

func, *args, **kwargs):

429

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

430

431

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

432

return value on the provided multiprocessing.Connection.

433

"""

434

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

435

connection.close()

436

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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

437

275

class Client(object):

438

276

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

439

277

440

278

Attributes:

441

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

279

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

442

280

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

443

281

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

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

451

289

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

452

290

checker_initiator_tag: a gobject event source tag, or None

453

291

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

454

client_structure: Object describing what attributes a client has

455

and is used for storing the client at exit

456

292

current_checker_command: string; current running checker_command

293

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

457

294

disable_initiator_tag: a gobject event source tag, or None

458

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enabled: bool()

459

296

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

462

299

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

463

300

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

464

301

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

465

last_checker_status: integer between 0 and 255 reflecting exit

466

status of last checker. -1 reflects crashed

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checker, -2 means no checker completed yet.

468

last_checker_signal: The signal which killed the last checker, if

469

last_checker_status is -1

470

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

302

last_enabled: datetime.datetime(); (UTC)

471

303

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

472

304

D-Bus identifiers

473

305

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

474

306

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

475

307

until this client is disabled

476

extended_timeout: extra long timeout when secret has been sent

308

extended_timeout: extra long timeout when password has been sent

477

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runtime_expansions: Allowed attributes for runtime expansion.

478

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

479

311

disabled, or None

480

server_settings: The server_settings dict from main()

481

312

"""

482

313

483

314

runtime_expansions = ("approval_delay", "approval_duration",

484

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

485

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

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"last_approval_request", "last_checked_ok",

315

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

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

487

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

488

client_defaults = {

489

"timeout": "PT5M",

490

"extended_timeout": "PT15M",

491

"interval": "PT2M",

492

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

493

"host": "",

494

"approval_delay": "PT0S",

495

"approval_duration": "PT1S",

496

"approved_by_default": "True",

497

"enabled": "True",

498

}

499

500

@staticmethod

501

def config_parser(config):

502

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

503

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

504

with exceptions for any special settings as defined above.

505

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

506

value given the same arguments.

507

"""

508

settings = {}

509

for client_name in config.sections():

510

section = dict(config.items(client_name))

511

client = settings[client_name] = {}

512

513

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

514

# Reformat values from string types to Python types

515

client["approved_by_default"] = config.getboolean(

516

client_name, "approved_by_default")

517

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

518

"enabled")

519

520

# Uppercase and remove spaces from fingerprint for later

521

# comparison purposes with return value from the

522

# fingerprint() function

523

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

524

.replace(" ", ""))

525

if "secret" in section:

526

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

527

elif "secfile" in section:

528

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

529

(section["secfile"])),

530

"rb") as secfile:

531

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

532

else:

533

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

534

.format(section))

535

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

536

client["extended_timeout"] = string_to_delta(

537

section["extended_timeout"])

538

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

539

client["approval_delay"] = string_to_delta(

540

section["approval_delay"])

541

client["approval_duration"] = string_to_delta(

542

section["approval_duration"])

543

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

544

client["last_approval_request"] = None

545

client["last_checked_ok"] = None

546

client["last_checker_status"] = -2

547

548

return settings

549

550

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

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."""

551

338

self.name = name

552

if server_settings is None:

553

server_settings = {}

554

self.server_settings = server_settings

555

# adding all client settings

556

for setting, value in settings.items():

557

setattr(self, setting, value)

558

559

if self.enabled:

560

if not hasattr(self, "last_enabled"):

561

self.last_enabled = datetime.datetime.utcnow()

562

if not hasattr(self, "expires"):

563

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

564

+ self.timeout)

565

else:

566

self.last_enabled = None

567

self.expires = None

568

339

if config is None:

340

config = {}

569

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(" ", ""))

570

347

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

571

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

572

datetime.datetime.utcnow())

573

574

# 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

575

369

self.checker = None

576

370

self.checker_initiator_tag = None

577

371

self.disable_initiator_tag = None

372

self.expires = None

578

373

self.checker_callback_tag = None

374

self.checker_command = config["checker"]

579

375

self.current_checker_command = None

580

self.approved = None

376

self.last_connect = None

377

self._approved = None

378

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

379

True)

581

380

self.approvals_pending = 0

582

self.changedstate = multiprocessing_manager.Condition(

583

multiprocessing_manager.Lock())

584

self.client_structure = [attr

585

for attr in self.__dict__.iterkeys()

586

if not attr.startswith("_")]

587

self.client_structure.append("client_structure")

588

589

for name, t in inspect.getmembers(

590

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

591

if not name.startswith("_"):

592

self.client_structure.append(name)

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()))

593

388

594

# Send notice to process children that client state has changed

595

389

def send_changedstate(self):

596

with self.changedstate:

597

self.changedstate.notify_all()

390

self.changedstate.acquire()

391

self.changedstate.notify_all()

392

self.changedstate.release()

598

393

599

394

def enable(self):

600

395

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

601

396

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

602

397

# Already enabled

603

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

604

406

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

407

self.disable_initiator_tag = (gobject.timeout_add

408

(self.timeout_milliseconds(),

409

self.disable))

605

410

self.enabled = True

606

411

self.last_enabled = datetime.datetime.utcnow()

607

self.init_checker()

608

self.send_changedstate()

412

# Also start a new checker *right now*.

413

self.start_checker()

609

414

610

415

def disable(self, quiet=True):

611

416

"""Disable this client."""

612

417

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

613

418

return False

614

419

if not quiet:

420

self.send_changedstate()

421

if not quiet:

615

422

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

616

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

423

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

617

424

gobject.source_remove(self.disable_initiator_tag)

618

425

self.disable_initiator_tag = None

619

426

self.expires = None

620

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

427

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

621

428

gobject.source_remove(self.checker_initiator_tag)

622

429

self.checker_initiator_tag = None

623

430

self.stop_checker()

431

if self.disable_hook:

432

self.disable_hook(self)

624

433

self.enabled = False

625

if not quiet:

626

self.send_changedstate()

627

434

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

628

435

return False

629

436

630

437

def __del__(self):

438

self.disable_hook = None

631

439

self.disable()

632

440

633

def init_checker(self):

634

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

635

# and every interval from then on.

636

if self.checker_initiator_tag is not None:

637

gobject.source_remove(self.checker_initiator_tag)

638

self.checker_initiator_tag = gobject.timeout_add(

639

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

640

self.start_checker)

641

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

642

if self.disable_initiator_tag is not None:

643

gobject.source_remove(self.disable_initiator_tag)

644

self.disable_initiator_tag = gobject.timeout_add(

645

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

646

# Also start a new checker *right now*.

647

self.start_checker()

648

649

def checker_callback(self, source, condition, connection,

650

command):

441

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

651

442

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

652

443

self.checker_callback_tag = None

653

444

self.checker = None

654

# Read return code from connection (see call_pipe)

655

returncode = connection.recv()

656

connection.close()

657

658

if returncode >= 0:

659

self.last_checker_status = returncode

660

self.last_checker_signal = None

661

if self.last_checker_status == 0:

445

if os.WIFEXITED(condition):

446

exitstatus = os.WEXITSTATUS(condition)

447

if exitstatus == 0:

662

448

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

663

449

vars(self))

664

450

self.checked_ok()

665

451

else:

666

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

452

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

453

vars(self))

667

454

else:

668

self.last_checker_status = -1

669

self.last_checker_signal = -returncode

670

455

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

671

456

vars(self))

672

return False

673

674

def checked_ok(self):

675

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

676

self.last_checked_ok = datetime.datetime.utcnow()

677

self.last_checker_status = 0

678

self.last_checker_signal = None

679

self.bump_timeout()

680

681

def bump_timeout(self, timeout=None):

682

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

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

"""

683

464

if timeout is None:

684

465

timeout = self.timeout

685

if self.disable_initiator_tag is not None:

686

gobject.source_remove(self.disable_initiator_tag)

687

self.disable_initiator_tag = None

688

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

689

self.disable_initiator_tag = gobject.timeout_add(

690

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

691

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

466

self.last_checked_ok = datetime.datetime.utcnow()

467

gobject.source_remove(self.disable_initiator_tag)

468

self.disable_initiator_tag = (gobject.timeout_add

469

(_timedelta_to_milliseconds

470

(timeout), self.disable))

471

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

692

472

693

473

def need_approval(self):

694

474

self.last_approval_request = datetime.datetime.utcnow()

699

479

If a checker already exists, leave it running and do

700

480

nothing."""

701

481

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

702

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

703

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

704

# would inevitably timeout, since no checker would get a

705

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

482

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

483

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

484

# client would inevitably timeout, since no checker would get

485

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

706

486

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

707

487

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

708

488

# should be.

709

489

710

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

711

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

712

self.checker.join()

713

self.checker = None

490

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

491

try:

492

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

493

except (AttributeError, OSError) as error:

494

if (isinstance(error, OSError)

495

and error.errno != errno.ECHILD):

496

raise error

497

else:

498

if pid:

499

logger.warning("Checker was a zombie")

500

gobject.source_remove(self.checker_callback_tag)

501

self.checker_callback(pid, status,

502

self.current_checker_command)

714

503

# Start a new checker if needed

715

504

if self.checker is None:

716

# Escape attributes for the shell

717

escaped_attrs = {

718

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

719

for attr in self.runtime_expansions }

720

505

try:

721

command = self.checker_command % escaped_attrs

722

except TypeError as error:

723

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

724

self.checker_command,

725

exc_info=error)

726

return True # Try again later

506

# In case checker_command has exactly one % operator

507

command = self.checker_command % self.host

508

except TypeError:

509

# Escape attributes for the shell

510

escaped_attrs = dict(

511

(attr,

512

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

513

errors=

514

'replace')))

515

for attr in

516

self.runtime_expansions)

517

518

try:

519

command = self.checker_command % escaped_attrs

520

except TypeError as error:

521

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

522

' %s', self.checker_command, error)

523

return True # Try again later

727

524

self.current_checker_command = command

728

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

729

self.name)

730

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

731

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

732

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

733

# always replaced by /dev/null.)

734

# The exception is when not debugging but nevertheless

735

# running in the foreground; use the previously

736

# created wnull.

737

popen_args = { "close_fds": True,

738

"shell": True,

739

"cwd": "/" }

740

if (not self.server_settings["debug"]

741

and self.server_settings["foreground"]):

742

popen_args.update({"stdout": wnull,

743

"stderr": wnull })

744

pipe = multiprocessing.Pipe(duplex = False)

745

self.checker = multiprocessing.Process(

746

target = call_pipe,

747

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

748

kwargs = popen_args)

749

self.checker.start()

750

self.checker_callback_tag = gobject.io_add_watch(

751

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

752

self.checker_callback, pipe[0], command)

525

try:

526

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

527

command, self.name)

528

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

529

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

530

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

531

# always replaced by /dev/null.)

532

self.checker = subprocess.Popen(command,

533

close_fds=True,

534

shell=True, cwd="/")

535

self.checker_callback_tag = (gobject.child_watch_add

536

(self.checker.pid,

537

self.checker_callback,

538

data=command))

539

# The checker may have completed before the gobject

540

# watch was added. Check for this.

541

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

542

if pid:

543

gobject.source_remove(self.checker_callback_tag)

544

self.checker_callback(pid, status, command)

545

except OSError as error:

546

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

547

error)

753

548

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

754

549

return True

755

550

761

556

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

762

557

return

763

558

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

764

self.checker.terminate()

559

try:

560

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

561

#time.sleep(0.5)

562

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

563

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

564

except OSError as error:

565

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

566

raise

765

567

self.checker = None

766

568

767

569

768

def dbus_service_property(dbus_interface,

769

signature="v",

770

access="readwrite",

771

byte_arrays=False):

570

def dbus_service_property(dbus_interface, signature="v",

571

access="readwrite", byte_arrays=False):

772

572

"""Decorators for marking methods of a DBusObjectWithProperties to

773

573

become properties on the D-Bus.

774

574

783

583

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

784

584

if byte_arrays and signature != "ay":

785

585

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

786

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

787

586

" signature %r" % signature)

788

587

def decorator(func):

789

588

func._dbus_is_property = True

790

589

func._dbus_interface = dbus_interface

795

594

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

796

595

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

797

596

return func

798

799

return decorator

800

801

802

def dbus_interface_annotations(dbus_interface):

803

"""Decorator for marking functions returning interface annotations

804

805

Usage:

806

807

@dbus_interface_annotations("org.example.Interface")

808

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

809

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

810

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

811

"false"}

812

"""

813

814

def decorator(func):

815

func._dbus_is_interface = True

816

func._dbus_interface = dbus_interface

817

func._dbus_name = dbus_interface

818

return func

819

820

return decorator

821

822

823

def dbus_annotations(annotations):

824

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

825

Usage:

826

827

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

828

"org.freedesktop.DBus.Property."

829

"EmitsChangedSignal": "false"})

830

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

831

access="r")

832

def Property_dbus_property(self):

833

return dbus.Boolean(False)

834

"""

835

836

def decorator(func):

837

func._dbus_annotations = annotations

838

return func

839

840

597

return decorator

841

598

842

599

843

600

class DBusPropertyException(dbus.exceptions.DBusException):

844

601

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

845

602

"""

846

pass

603

def __unicode__(self):

604

return unicode(str(self))

847

605

848

606

849

607

class DBusPropertyAccessException(DBusPropertyException):

867

625

"""

868

626

869

627

@staticmethod

870

def _is_dbus_thing(thing):

871

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

872

873

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

874

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

875

"""

876

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

877

False)

628

def _is_dbus_property(obj):

629

return getattr(obj, "_dbus_is_property", False)

878

630

879

def _get_all_dbus_things(self, thing):

631

def _get_all_dbus_properties(self):

880

632

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

881

633

"""

882

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

883

athing.__get__(self))

634

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

884

635

for cls in self.__class__.__mro__

885

for name, athing in

886

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

636

for name, prop in

637

inspect.getmembers(cls, self._is_dbus_property))

887

638

888

639

def _get_dbus_property(self, interface_name, property_name):

889

640

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

890

641

property with the specified name and interface.

891

642

"""

892

for cls in self.__class__.__mro__:

893

for name, value in inspect.getmembers(

894

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

643

for cls in self.__class__.__mro__:

644

for name, value in (inspect.getmembers

645

(cls, self._is_dbus_property)):

895

646

if (value._dbus_name == property_name

896

647

and value._dbus_interface == interface_name):

897

648

return value.__get__(self)

898

649

899

650

# No such property

900

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

901

self.dbus_object_path, interface_name, property_name))

651

raise DBusPropertyNotFound(self.dbus_object_path + ":"

652

+ interface_name + "."

653

+ property_name)

902

654

903

@dbus.service.method(dbus.PROPERTIES_IFACE,

904

in_signature="ss",

655

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

905

656

out_signature="v")

906

657

def Get(self, interface_name, property_name):

907

658

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

925

676

# The byte_arrays option is not supported yet on

926

677

# signatures other than "ay".

927

678

if prop._dbus_signature != "ay":

928

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

929

"'ay' signature {!r}"

930

.format(prop._dbus_signature))

931

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

932

for byte in value))

679

raise ValueError

680

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

681

for byte in value))

933

682

prop(value)

934

683

935

@dbus.service.method(dbus.PROPERTIES_IFACE,

936

in_signature="s",

684

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

937

685

out_signature="a{sv}")

938

686

def GetAll(self, interface_name):

939

687

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

941

689

942

690

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

943

691

"""

944

properties = {}

945

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

692

all = {}

693

for name, prop in self._get_all_dbus_properties():

946

694

if (interface_name

947

695

and interface_name != prop._dbus_interface):

948

696

# Interface non-empty but did not match

952

700

continue

953

701

value = prop()

954

702

if not hasattr(value, "variant_level"):

955

properties[name] = value

703

all[name] = value

956

704

continue

957

properties[name] = type(value)(

958

value, variant_level = value.variant_level + 1)

959

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

960

961

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

962

def PropertiesChanged(self, interface_name, changed_properties,

963

invalidated_properties):

964

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

965

standard.

966

"""

967

pass

705

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

706

value.variant_level+1)

707

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

968

708

969

709

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

970

710

out_signature="s",

971

711

path_keyword='object_path',

972

712

connection_keyword='connection')

973

713

def Introspect(self, object_path, connection):

974

"""Overloading of standard D-Bus method.

975

976

Inserts property tags and interface annotation tags.

714

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

977

715

"""

978

716

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

979

717

connection)

980

718

try:

981

719

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

982

983

720

def make_tag(document, name, prop):

984

721

e = document.createElement("property")

985

722

e.setAttribute("name", name)

986

723

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

987

724

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

988

725

return e

989

990

726

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

991

# Add property tags

992

727

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

993

728

for name, prop

994

in self._get_all_dbus_things("property")

729

in self._get_all_dbus_properties()

995

730

if prop._dbus_interface

996

731

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

997

732

if_tag.appendChild(tag)

998

# Add annotation tags

999

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

1000

for tag in if_tag.getElementsByTagName(typ):

1001

annots = dict()

1002

for name, prop in (self.

1003

_get_all_dbus_things(typ)):

1004

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

1005

and prop._dbus_interface

1006

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

1007

annots.update(getattr(

1008

prop, "_dbus_annotations", {}))

1009

for name, value in annots.items():

1010

ann_tag = document.createElement(

1011

"annotation")

1012

ann_tag.setAttribute("name", name)

1013

ann_tag.setAttribute("value", value)

1014

tag.appendChild(ann_tag)

1015

# Add interface annotation tags

1016

for annotation, value in dict(

1017

itertools.chain.from_iterable(

1018

annotations().items()

1019

for name, annotations

1020

in self._get_all_dbus_things("interface")

1021

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

1022

)).items():

1023

ann_tag = document.createElement("annotation")

1024

ann_tag.setAttribute("name", annotation)

1025

ann_tag.setAttribute("value", value)

1026

if_tag.appendChild(ann_tag)

1027

733

# Add the names to the return values for the

1028

734

# "org.freedesktop.DBus.Properties" methods

1029

735

if (if_tag.getAttribute("name")

1044

750

except (AttributeError, xml.dom.DOMException,

1045

751

xml.parsers.expat.ExpatError) as error:

1046

752

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

1047

exc_info=error)

753

error)

1048

754

return xmlstring

1049

755

1050

756

1051

def datetime_to_dbus(dt, variant_level=0):

757

def datetime_to_dbus (dt, variant_level=0):

1052

758

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

1053

759

if dt is None:

1054

760

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

1055

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

1056

1057

1058

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1059

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

1060

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

1061

interface names according to the "alt_interface_names" mapping.

1062

Usage:

1063

1064

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

1065

"net.example.AlternateInterface"})

1066

class SampleDBusObject(dbus.service.Object):

1067

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

1068

def SampleDBusMethod():

1069

pass

1070

1071

The above "SampleDBusMethod" on "SampleDBusObject" will be

1072

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

1073

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

1074

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

1075

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

1076

1077

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

1078

(from DBusObjectWithProperties) and interfaces (from the

1079

dbus_interface_annotations decorator).

761

return dbus.String(dt.isoformat(),

762

variant_level=variant_level)

763

764

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

765

.__metaclass__):

766

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

767

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

1080

768

"""

1081

1082

def wrapper(cls):

1083

for orig_interface_name, alt_interface_name in (

1084

alt_interface_names.items()):

1085

attr = {}

1086

interface_names = set()

1087

# Go though all attributes of the class

1088

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

769

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

770

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

771

# methods, signals, or properties in them

772

for base in (b for b in bases

773

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

774

# Go though all attributes of the base class

775

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

1089

776

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

1090

777

# with the wrong interface name

1091

778

if (not hasattr(attribute, "_dbus_interface")

1092

or not attribute._dbus_interface.startswith(

1093

orig_interface_name)):

779

or not attribute._dbus_interface

780

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

1094

781

continue

1095

782

# Create an alternate D-Bus interface name based on

1096

783

# the current name

1097

alt_interface = attribute._dbus_interface.replace(

1098

orig_interface_name, alt_interface_name)

1099

interface_names.add(alt_interface)

784

alt_interface = (attribute._dbus_interface

785

.replace("se.recompile.Mandos",

786

"se.bsnet.fukt.Mandos"))

1100

787

# Is this a D-Bus signal?

1101

788

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

1102

if sys.version_info.major == 2:

1103

# Extract the original non-method undecorated

1104

# function by black magic

1105

nonmethod_func = (dict(

789

# Extract the original non-method function by

790

# black magic

791

nonmethod_func = (dict(

1106

792

zip(attribute.func_code.co_freevars,

1107

attribute.__closure__))

1108

["func"].cell_contents)

1109

else:

1110

nonmethod_func = attribute

793

attribute.__closure__))["func"]

794

.cell_contents)

1111

795

# Create a new, but exactly alike, function

1112

796

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

1113

797

# with the alternate D-Bus interface name

1114

if sys.version_info.major == 2:

1115

new_function = types.FunctionType(

1116

nonmethod_func.func_code,

1117

nonmethod_func.func_globals,

1118

nonmethod_func.func_name,

1119

nonmethod_func.func_defaults,

1120

nonmethod_func.func_closure)

1121

else:

1122

new_function = types.FunctionType(

1123

nonmethod_func.__code__,

1124

nonmethod_func.__globals__,

1125

nonmethod_func.__name__,

1126

nonmethod_func.__defaults__,

1127

nonmethod_func.__closure__)

1128

new_function = (dbus.service.signal(

1129

alt_interface,

1130

attribute._dbus_signature)(new_function))

1131

# Copy annotations, if any

1132

try:

1133

new_function._dbus_annotations = dict(

1134

attribute._dbus_annotations)

1135

except AttributeError:

1136

pass

798

new_function = (dbus.service.signal

799

(alt_interface,

800

attribute._dbus_signature)

801

(types.FunctionType(

802

nonmethod_func.func_code,

803

nonmethod_func.func_globals,

804

nonmethod_func.func_name,

805

nonmethod_func.func_defaults,

806

nonmethod_func.func_closure)))

1137

807

# Define a creator of a function to call both the

1138

# original and alternate functions, so both the

1139

# original and alternate signals gets sent when

1140

# the function is called

808

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

809

# signals gets sent when the function is called

1141

810

def fixscope(func1, func2):

1142

811

"""This function is a scope container to pass

1143

812

func1 and func2 to the "call_both" function

1144

813

outside of its arguments"""

1145

1146

814

def call_both(*args, **kwargs):

1147

815

"""This function will emit two D-Bus

1148

816

signals by calling func1 and func2"""

1149

817

func1(*args, **kwargs)

1150

818

func2(*args, **kwargs)

1151

1152

819

return call_both

1153

820

# Create the "call_both" function and add it to

1154

821

# the class

1155

attr[attrname] = fixscope(attribute, new_function)

822

attr[attrname] = fixscope(attribute,

823

new_function)

1156

824

# Is this a D-Bus method?

1157

825

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

1158

826

# Create a new, but exactly alike, function

1159

827

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

1160

828

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

1161

829

# to the class.

1162

attr[attrname] = (

1163

dbus.service.method(

1164

alt_interface,

1165

attribute._dbus_in_signature,

1166

attribute._dbus_out_signature)

1167

(types.FunctionType(attribute.func_code,

1168

attribute.func_globals,

1169

attribute.func_name,

1170

attribute.func_defaults,

1171

attribute.func_closure)))

1172

# Copy annotations, if any

1173

try:

1174

attr[attrname]._dbus_annotations = dict(

1175

attribute._dbus_annotations)

1176

except AttributeError:

1177

pass

830

attr[attrname] = (dbus.service.method

831

(alt_interface,

832

attribute._dbus_in_signature,

833

attribute._dbus_out_signature)

834

(types.FunctionType

835

(attribute.func_code,

836

attribute.func_globals,

837

attribute.func_name,

838

attribute.func_defaults,

839

attribute.func_closure)))

1178

840

# Is this a D-Bus property?

1179

841

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

1180

842

# Create a new, but exactly alike, function

1181

843

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

1182

844

# property with the alternate D-Bus interface

1183

845

# name. Add it to the class.

1184

attr[attrname] = (dbus_service_property(

1185

alt_interface, attribute._dbus_signature,

1186

attribute._dbus_access,

1187

attribute._dbus_get_args_options

1188

["byte_arrays"])

1189

(types.FunctionType(

1190

attribute.func_code,

1191

attribute.func_globals,

1192

attribute.func_name,

1193

attribute.func_defaults,

1194

attribute.func_closure)))

1195

# Copy annotations, if any

1196

try:

1197

attr[attrname]._dbus_annotations = dict(

1198

attribute._dbus_annotations)

1199

except AttributeError:

1200

pass

1201

# Is this a D-Bus interface?

1202

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

1203

# Create a new, but exactly alike, function

1204

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

1205

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

1206

# to the class.

1207

attr[attrname] = (

1208

dbus_interface_annotations(alt_interface)

1209

(types.FunctionType(attribute.func_code,

1210

attribute.func_globals,

1211

attribute.func_name,

1212

attribute.func_defaults,

1213

attribute.func_closure)))

1214

if deprecate:

1215

# Deprecate all alternate interfaces

1216

iname="_AlternateDBusNames_interface_annotation{}"

1217

for interface_name in interface_names:

1218

1219

@dbus_interface_annotations(interface_name)

1220

def func(self):

1221

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

1222

"true" }

1223

# Find an unused name

1224

for aname in (iname.format(i)

1225

for i in itertools.count()):

1226

if aname not in attr:

1227

attr[aname] = func

1228

break

1229

if interface_names:

1230

# Replace the class with a new subclass of it with

1231

# methods, signals, etc. as created above.

1232

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

1233

(cls, ), attr)

1234

return cls

1235

1236

return wrapper

1237

1238

1239

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

1240

"se.bsnet.fukt.Mandos"})

846

attr[attrname] = (dbus_service_property

847

(alt_interface,

848

attribute._dbus_signature,

849

attribute._dbus_access,

850

attribute

851

._dbus_get_args_options

852

["byte_arrays"])

853

(types.FunctionType

854

(attribute.func_code,

855

attribute.func_globals,

856

attribute.func_name,

857

attribute.func_defaults,

858

attribute.func_closure)))

859

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

860

1241

861

class ClientDBus(Client, DBusObjectWithProperties):

1242

862

"""A Client class using D-Bus

1243

863

1247

867

"""

1248

868

1249

869

runtime_expansions = (Client.runtime_expansions

1250

+ ("dbus_object_path", ))

1251

1252

_interface = "se.recompile.Mandos.Client"

870

+ ("dbus_object_path",))

1253

871

1254

872

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

1255

873

1256

874

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

875

self._approvals_pending = 0

1257

876

self.bus = bus

1258

877

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

1259

878

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

1260

879

# the D-Bus

1261

client_object_name = str(self.name).translate(

880

client_object_name = unicode(self.name).translate(

1262

881

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

1263

882

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

1264

self.dbus_object_path = dbus.ObjectPath(

1265

"/clients/" + client_object_name)

883

self.dbus_object_path = (dbus.ObjectPath

884

("/clients/" + client_object_name))

1266

885

DBusObjectWithProperties.__init__(self, self.bus,

1267

886

self.dbus_object_path)

1268

1269

def notifychangeproperty(transform_func, dbus_name,

1270

type_func=lambda x: x,

1271

variant_level=1,

1272

invalidate_only=False,

1273

_interface=_interface):

887

888

def notifychangeproperty(transform_func,

889

dbus_name, type_func=lambda x: x,

890

variant_level=1):

1274

891

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

1275

892

its changes to DBus.

1276

893

1277

894

transform_fun: Function that takes a value and a variant_level

1278

895

and transforms it to a D-Bus type.

1279

896

dbus_name: D-Bus name of the variable

1281

898

to the D-Bus. Default: no transform

1282

899

variant_level: D-Bus variant level. Default: 1

1283

900

"""

1284

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

1285

901

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

1286

902

def setter(self, value):

1287

903

if hasattr(self, "dbus_object_path"):

1288

904

if (not hasattr(self, attrname) or

1289

905

type_func(getattr(self, attrname, None))

1290

906

!= type_func(value)):

1291

if invalidate_only:

1292

self.PropertiesChanged(

1293

_interface, dbus.Dictionary(),

1294

dbus.Array((dbus_name, )))

1295

else:

1296

dbus_value = transform_func(

1297

type_func(value),

1298

variant_level = variant_level)

1299

self.PropertyChanged(dbus.String(dbus_name),

1300

dbus_value)

1301

self.PropertiesChanged(

1302

_interface,

1303

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

1304

dbus_value }),

1305

dbus.Array())

907

dbus_value = transform_func(type_func(value),

908

variant_level

909

=variant_level)

910

self.PropertyChanged(dbus.String(dbus_name),

911

dbus_value)

1306

912

setattr(self, attrname, value)

1307

913

1308

914

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

1309

915

916

1310

917

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1311

918

approvals_pending = notifychangeproperty(dbus.Boolean,

1312

919

"ApprovalPending",

1314

921

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

1315

922

last_enabled = notifychangeproperty(datetime_to_dbus,

1316

923

"LastEnabled")

1317

checker = notifychangeproperty(

1318

dbus.Boolean, "CheckerRunning",

1319

type_func = lambda checker: checker is not None)

924

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

925

type_func = lambda checker:

926

checker is not None)

1320

927

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1321

928

"LastCheckedOK")

1322

last_checker_status = notifychangeproperty(dbus.Int16,

1323

"LastCheckerStatus")

1324

929

last_approval_request = notifychangeproperty(

1325

930

datetime_to_dbus, "LastApprovalRequest")

1326

931

approved_by_default = notifychangeproperty(dbus.Boolean,

1327

932

"ApprovedByDefault")

1328

approval_delay = notifychangeproperty(

1329

dbus.UInt64, "ApprovalDelay",

1330

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

933

approval_delay = notifychangeproperty(dbus.UInt16,

934

"ApprovalDelay",

935

type_func =

936

_timedelta_to_milliseconds)

1331

937

approval_duration = notifychangeproperty(

1332

dbus.UInt64, "ApprovalDuration",

1333

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

938

dbus.UInt16, "ApprovalDuration",

939

type_func = _timedelta_to_milliseconds)

1334

940

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

1335

timeout = notifychangeproperty(

1336

dbus.UInt64, "Timeout",

1337

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

941

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

942

type_func =

943

_timedelta_to_milliseconds)

1338

944

extended_timeout = notifychangeproperty(

1339

dbus.UInt64, "ExtendedTimeout",

1340

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

1341

interval = notifychangeproperty(

1342

dbus.UInt64, "Interval",

1343

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

945

dbus.UInt16, "ExtendedTimeout",

946

type_func = _timedelta_to_milliseconds)

947

interval = notifychangeproperty(dbus.UInt16,

948

"Interval",

949

type_func =

950

_timedelta_to_milliseconds)

1344

951

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

1345

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

1346

invalidate_only=True)

1347

952

1348

953

del notifychangeproperty

1349

954

1356

961

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

1357

962

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

1358

963

1359

def checker_callback(self, source, condition,

1360

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

1361

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

1362

connection, command, *args,

1363

**kwargs)

1364

exitstatus = self.last_checker_status

1365

if exitstatus >= 0:

964

def checker_callback(self, pid, condition, command,

965

*args, **kwargs):

966

self.checker_callback_tag = None

967

self.checker = None

968

if os.WIFEXITED(condition):

969

exitstatus = os.WEXITSTATUS(condition)

1366

970

# Emit D-Bus signal

1367

971

self.CheckerCompleted(dbus.Int16(exitstatus),

1368

dbus.Int64(0),

972

dbus.Int64(condition),

1369

973

dbus.String(command))

1370

974

else:

1371

975

# Emit D-Bus signal

1372

976

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

1373

dbus.Int64(

1374

self.last_checker_signal),

977

dbus.Int64(condition),

1375

978

dbus.String(command))

1376

return ret

979

980

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

981

*args, **kwargs)

1377

982

1378

983

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

1379

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

984

old_checker = self.checker

985

if self.checker is not None:

986

old_checker_pid = self.checker.pid

987

else:

988

old_checker_pid = None

1380

989

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

1381

990

# Only if new checker process was started

1382

991

if (self.checker is not None

1386

995

return r

1387

996

1388

997

def _reset_approved(self):

1389

self.approved = None

998

self._approved = None

1390

999

return False

1391

1000

1392

1001

def approve(self, value=True):

1393

self.approved = value

1394

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

1395

* 1000), self._reset_approved)

1396

1002

self.send_changedstate()

1003

self._approved = value

1004

gobject.timeout_add(_timedelta_to_milliseconds

1005

(self.approval_duration),

1006

self._reset_approved)

1007

1397

1008

1398

1009

## D-Bus methods, signals & properties

1399

1400

## Interfaces

1010

_interface = "se.recompile.Mandos.Client"

1401

1011

1402

1012

## Signals

1403

1013

1414

1024

pass

1415

1025

1416

1026

# PropertyChanged - signal

1417

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

1418

1027

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

1419

1028

def PropertyChanged(self, property, value):

1420

1029

"D-Bus signal"

1484

1093

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

1485

1094

1486

1095

# ApprovedByDefault - property

1487

@dbus_service_property(_interface,

1488

signature="b",

1096

@dbus_service_property(_interface, signature="b",

1489

1097

access="readwrite")

1490

1098

def ApprovedByDefault_dbus_property(self, value=None):

1491

1099

if value is None: # get

1493

1101

self.approved_by_default = bool(value)

1494

1102

1495

1103

# ApprovalDelay - property

1496

@dbus_service_property(_interface,

1497

signature="t",

1104

@dbus_service_property(_interface, signature="t",

1498

1105

access="readwrite")

1499

1106

def ApprovalDelay_dbus_property(self, value=None):

1500

1107

if value is None: # get

1501

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

1502

* 1000)

1108

return dbus.UInt64(self.approval_delay_milliseconds())

1503

1109

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

1504

1110

1505

1111

# ApprovalDuration - property

1506

@dbus_service_property(_interface,

1507

signature="t",

1112

@dbus_service_property(_interface, signature="t",

1508

1113

access="readwrite")

1509

1114

def ApprovalDuration_dbus_property(self, value=None):

1510

1115

if value is None: # get

1511

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

1512

* 1000)

1116

return dbus.UInt64(_timedelta_to_milliseconds(

1117

self.approval_duration))

1513

1118

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

1514

1119

1515

1120

# Name - property

1523

1128

return dbus.String(self.fingerprint)

1524

1129

1525

1130

# Host - property

1526

@dbus_service_property(_interface,

1527

signature="s",

1131

@dbus_service_property(_interface, signature="s",

1528

1132

access="readwrite")

1529

1133

def Host_dbus_property(self, value=None):

1530

1134

if value is None: # get

1531

1135

return dbus.String(self.host)

1532

self.host = str(value)

1136

self.host = value

1533

1137

1534

1138

# Created - property

1535

1139

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

1536

1140

def Created_dbus_property(self):

1537

return datetime_to_dbus(self.created)

1141

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

1538

1142

1539

1143

# LastEnabled - property

1540

1144

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

1542

1146

return datetime_to_dbus(self.last_enabled)

1543

1147

1544

1148

# Enabled - property

1545

@dbus_service_property(_interface,

1546

signature="b",

1149

@dbus_service_property(_interface, signature="b",

1547

1150

access="readwrite")

1548

1151

def Enabled_dbus_property(self, value=None):

1549

1152

if value is None: # get

1554

1157

self.disable()

1555

1158

1556

1159

# LastCheckedOK - property

1557

@dbus_service_property(_interface,

1558

signature="s",

1160

@dbus_service_property(_interface, signature="s",

1559

1161

access="readwrite")

1560

1162

def LastCheckedOK_dbus_property(self, value=None):

1561

1163

if value is not None:

1563

1165

return

1564

1166

return datetime_to_dbus(self.last_checked_ok)

1565

1167

1566

# LastCheckerStatus - property

1567

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

1568

def LastCheckerStatus_dbus_property(self):

1569

return dbus.Int16(self.last_checker_status)

1570

1571

1168

# Expires - property

1572

1169

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

1573

1170

def Expires_dbus_property(self):

1579

1176

return datetime_to_dbus(self.last_approval_request)

1580

1177

1581

1178

# Timeout - property

1582

@dbus_service_property(_interface,

1583

signature="t",

1179

@dbus_service_property(_interface, signature="t",

1584

1180

access="readwrite")

1585

1181

def Timeout_dbus_property(self, value=None):

1586

1182

if value is None: # get

1587

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

1588

old_timeout = self.timeout

1183

return dbus.UInt64(self.timeout_milliseconds())

1589

1184

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

1590

# Reschedule disabling

1591

if self.enabled:

1592

now = datetime.datetime.utcnow()

1593

self.expires += self.timeout - old_timeout

1594

if self.expires <= now:

1595

# The timeout has passed

1596

self.disable()

1597

else:

1598

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

1599

is None):

1600

return

1601

gobject.source_remove(self.disable_initiator_tag)

1602

self.disable_initiator_tag = gobject.timeout_add(

1603

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

1604

self.disable)

1185

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

1186

return

1187

# Reschedule timeout

1188

gobject.source_remove(self.disable_initiator_tag)

1189

self.disable_initiator_tag = None

1190

self.expires = None

1191

time_to_die = _timedelta_to_milliseconds((self

1192

.last_checked_ok

1193

+ self.timeout)

1194

- datetime.datetime

1195

.utcnow())

1196

if time_to_die <= 0:

1197

# The timeout has passed

1198

self.disable()

1199

else:

1200

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

1201

+ datetime.timedelta(milliseconds =

1202

time_to_die))

1203

self.disable_initiator_tag = (gobject.timeout_add

1204

(time_to_die, self.disable))

1605

1205

1606

1206

# ExtendedTimeout - property

1607

@dbus_service_property(_interface,

1608

signature="t",

1207

@dbus_service_property(_interface, signature="t",

1609

1208

access="readwrite")

1610

1209

def ExtendedTimeout_dbus_property(self, value=None):

1611

1210

if value is None: # get

1612

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

1613

* 1000)

1211

return dbus.UInt64(self.extended_timeout_milliseconds())

1614

1212

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

1615

1213

1616

1214

# Interval - property

1617

@dbus_service_property(_interface,

1618

signature="t",

1215

@dbus_service_property(_interface, signature="t",

1619

1216

access="readwrite")

1620

1217

def Interval_dbus_property(self, value=None):

1621

1218

if value is None: # get

1622

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

1219

return dbus.UInt64(self.interval_milliseconds())

1623

1220

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

1624

1221

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

1625

1222

return

1626

if self.enabled:

1627

# Reschedule checker run

1628

gobject.source_remove(self.checker_initiator_tag)

1629

self.checker_initiator_tag = gobject.timeout_add(

1630

value, self.start_checker)

1631

self.start_checker() # Start one now, too

1223

# Reschedule checker run

1224

gobject.source_remove(self.checker_initiator_tag)

1225

self.checker_initiator_tag = (gobject.timeout_add

1226

(value, self.start_checker))

1227

self.start_checker() # Start one now, too

1632

1228

1633

1229

# Checker - property

1634

@dbus_service_property(_interface,

1635

signature="s",

1230

@dbus_service_property(_interface, signature="s",

1636

1231

access="readwrite")

1637

1232

def Checker_dbus_property(self, value=None):

1638

1233

if value is None: # get

1639

1234

return dbus.String(self.checker_command)

1640

self.checker_command = str(value)

1235

self.checker_command = value

1641

1236

1642

1237

# CheckerRunning - property

1643

@dbus_service_property(_interface,

1644

signature="b",

1238

@dbus_service_property(_interface, signature="b",

1645

1239

access="readwrite")

1646

1240

def CheckerRunning_dbus_property(self, value=None):

1647

1241

if value is None: # get

1657

1251

return self.dbus_object_path # is already a dbus.ObjectPath

1658

1252

1659

1253

# Secret = property

1660

@dbus_service_property(_interface,

1661

signature="ay",

1662

access="write",

1663

byte_arrays=True)

1254

@dbus_service_property(_interface, signature="ay",

1255

access="write", byte_arrays=True)

1664

1256

def Secret_dbus_property(self, value):

1665

self.secret = bytes(value)

1257

self.secret = str(value)

1666

1258

1667

1259

del _interface

1668

1260

1672

1264

self._pipe = child_pipe

1673

1265

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

1674

1266

if not self._pipe.recv():

1675

raise KeyError(fpr)

1267

raise KeyError()

1676

1268

1677

1269

def __getattribute__(self, name):

1678

if name == '_pipe':

1270

if(name == '_pipe'):

1679

1271

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

1680

1272

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

1681

1273

data = self._pipe.recv()

1682

1274

if data[0] == 'data':

1683

1275

return data[1]

1684

1276

if data[0] == 'function':

1685

1686

1277

def func(*args, **kwargs):

1687

1278

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

1688

1279

return self._pipe.recv()[1]

1689

1690

1280

return func

1691

1281

1692

1282

def __setattr__(self, name, value):

1693

if name == '_pipe':

1283

if(name == '_pipe'):

1694

1284

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

1695

1285

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

1696

1286

1287

class ClientDBusTransitional(ClientDBus):

1288

__metaclass__ = AlternateDBusNamesMetaclass

1697

1289

1698

1290

class ClientHandler(socketserver.BaseRequestHandler, object):

1699

1291

"""A class to handle client connections.

1704

1296

def handle(self):

1705

1297

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

1706

1298

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

1707

str(self.client_address))

1299

unicode(self.client_address))

1708

1300

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

1709

1301

self.server.child_pipe.fileno())

1710

1302

1711

session = gnutls.connection.ClientSession(

1712

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

1303

session = (gnutls.connection

1304

.ClientSession(self.request,

1305

gnutls.connection

1306

.X509Credentials()))

1713

1307

1714

1308

# Note: gnutls.connection.X509Credentials is really a

1715

1309

# generic GnuTLS certificate credentials object so long as

1724

1318

priority = self.server.gnutls_priority

1725

1319

if priority is None:

1726

1320

priority = "NORMAL"

1727

gnutls.library.functions.gnutls_priority_set_direct(

1728

session._c_object, priority, None)

1321

(gnutls.library.functions

1322

.gnutls_priority_set_direct(session._c_object,

1323

priority, None))

1729

1324

1730

1325

# Start communication using the Mandos protocol

1731

1326

# Get protocol number

1733

1328

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

1734

1329

try:

1735

1330

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

1736

raise RuntimeError(line)

1331

raise RuntimeError

1737

1332

except (ValueError, IndexError, RuntimeError) as error:

1738

1333

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

1739

1334

return

1751

1346

approval_required = False

1752

1347

try:

1753

1348

try:

1754

fpr = self.fingerprint(

1755

self.peer_certificate(session))

1349

fpr = self.fingerprint(self.peer_certificate

1350

(session))

1756

1351

except (TypeError,

1757

1352

gnutls.errors.GNUTLSError) as error:

1758

1353

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

1773

1368

while True:

1774

1369

if not client.enabled:

1775

1370

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

1776

client.name)

1371

client.name)

1777

1372

if self.server.use_dbus:

1778

1373

# Emit D-Bus signal

1779

1374

client.Rejected("Disabled")

1780

1375

return

1781

1376

1782

if client.approved or not client.approval_delay:

1377

if client._approved or not client.approval_delay:

1783

1378

#We are approved or approval is disabled

1784

1379

break

1785

elif client.approved is None:

1380

elif client._approved is None:

1786

1381

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

1787

1382

client.name)

1788

1383

if self.server.use_dbus:

1789

1384

# Emit D-Bus signal

1790

1385

client.NeedApproval(

1791

client.approval_delay.total_seconds()

1792

* 1000, client.approved_by_default)

1386

client.approval_delay_milliseconds(),

1387

client.approved_by_default)

1793

1388

else:

1794

1389

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

1795

1390

client.name)

1801

1396

#wait until timeout or approved

1802

1397

time = datetime.datetime.now()

1803

1398

client.changedstate.acquire()

1804

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

1399

(client.changedstate.wait

1400

(float(client._timedelta_to_milliseconds(delay)

1401

/ 1000)))

1805

1402

client.changedstate.release()

1806

1403

time2 = datetime.datetime.now()

1807

1404

if (time2 - time) >= delay:

1823

1420

try:

1824

1421

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

1825

1422

except gnutls.errors.GNUTLSError as error:

1826

logger.warning("gnutls send failed",

1827

exc_info=error)

1423

logger.warning("gnutls send failed")

1828

1424

return

1829

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

1830

len(client.secret) - (sent_size

1831

+ sent))

1425

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

1426

sent, len(client.secret)

1427

- (sent_size + sent))

1832

1428

sent_size += sent

1833

1429

1834

1430

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

1835

1431

# bump the timeout using extended_timeout

1836

client.bump_timeout(client.extended_timeout)

1432

client.checked_ok(client.extended_timeout)

1837

1433

if self.server.use_dbus:

1838

1434

# Emit D-Bus signal

1839

1435

client.GotSecret()

1844

1440

try:

1845

1441

session.bye()

1846

1442

except gnutls.errors.GNUTLSError as error:

1847

logger.warning("GnuTLS bye failed",

1848

exc_info=error)

1443

logger.warning("GnuTLS bye failed")

1849

1444

1850

1445

@staticmethod

1851

1446

def peer_certificate(session):

1852

1447

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

1853

1448

# If not an OpenPGP certificate...

1854

if (gnutls.library.functions.gnutls_certificate_type_get(

1855

session._c_object)

1449

if (gnutls.library.functions

1450

.gnutls_certificate_type_get(session._c_object)

1856

1451

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1857

1452

# ...do the normal thing

1858

1453

return session.peer_certificate

1872

1467

def fingerprint(openpgp):

1873

1468

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1874

1469

# New GnuTLS "datum" with the OpenPGP public key

1875

datum = gnutls.library.types.gnutls_datum_t(

1876

ctypes.cast(ctypes.c_char_p(openpgp),

1877

ctypes.POINTER(ctypes.c_ubyte)),

1878

ctypes.c_uint(len(openpgp)))

1470

datum = (gnutls.library.types

1471

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

1472

ctypes.POINTER

1473

(ctypes.c_ubyte)),

1474

ctypes.c_uint(len(openpgp))))

1879

1475

# New empty GnuTLS certificate

1880

1476

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1881

gnutls.library.functions.gnutls_openpgp_crt_init(

1882

ctypes.byref(crt))

1477

(gnutls.library.functions

1478

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

1883

1479

# Import the OpenPGP public key into the certificate

1884

gnutls.library.functions.gnutls_openpgp_crt_import(

1885

crt, ctypes.byref(datum),

1886

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

1480

(gnutls.library.functions

1481

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

1482

gnutls.library.constants

1483

.GNUTLS_OPENPGP_FMT_RAW))

1887

1484

# Verify the self signature in the key

1888

1485

crtverify = ctypes.c_uint()

1889

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1890

crt, 0, ctypes.byref(crtverify))

1486

(gnutls.library.functions

1487

.gnutls_openpgp_crt_verify_self(crt, 0,

1488

ctypes.byref(crtverify)))

1891

1489

if crtverify.value != 0:

1892

1490

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1893

raise gnutls.errors.CertificateSecurityError(

1894

"Verify failed")

1491

raise (gnutls.errors.CertificateSecurityError

1492

("Verify failed"))

1895

1493

# New buffer for the fingerprint

1896

1494

buf = ctypes.create_string_buffer(20)

1897

1495

buf_len = ctypes.c_size_t()

1898

1496

# Get the fingerprint from the certificate into the buffer

1899

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1900

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

1497

(gnutls.library.functions

1498

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

1499

ctypes.byref(buf_len)))

1901

1500

# Deinit the certificate

1902

1501

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1903

1502

# Convert the buffer to a Python bytestring

1904

1503

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

1905

1504

# Convert the bytestring to hexadecimal notation

1906

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

1505

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

1907

1506

return hex_fpr

1908

1507

1909

1508

1910

1509

class MultiprocessingMixIn(object):

1911

1510

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

1912

1913

1511

def sub_process_main(self, request, address):

1914

1512

try:

1915

1513

self.finish_request(request, address)

1916

except Exception:

1514

except:

1917

1515

self.handle_error(request, address)

1918

1516

self.close_request(request)

1919

1517

1920

1518

def process_request(self, request, address):

1921

1519

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

1922

1520

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

1923

args = (request, address))

1521

args = (request,

1522

address))

1924

1523

proc.start()

1925

1524

return proc

1926

1525

1927

1526

1928

1527

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1929

1528

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

1930

1931

1529

def process_request(self, request, client_address):

1932

1530

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

1933

1531

1942

1540

1943

1541

def add_pipe(self, parent_pipe, proc):

1944

1542

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

1945

raise NotImplementedError()

1543

raise NotImplementedError

1946

1544

1947

1545

1948

1546

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1954

1552

interface: None or a network interface name (string)

1955

1553

use_ipv6: Boolean; to use IPv6 or not

1956

1554

"""

1957

1958

1555

def __init__(self, server_address, RequestHandlerClass,

1959

interface=None,

1960

use_ipv6=True,

1961

socketfd=None):

1962

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

1963

creating a new one with socket.socket().

1964

"""

1556

interface=None, use_ipv6=True):

1965

1557

self.interface = interface

1966

1558

if use_ipv6:

1967

1559

self.address_family = socket.AF_INET6

1968

if socketfd is not None:

1969

# Save the file descriptor

1970

self.socketfd = socketfd

1971

# Save the original socket.socket() function

1972

self.socket_socket = socket.socket

1973

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

1974

#

1975

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

1976

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

1977

# patching socket.socket.)

1978

#

1979

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

1980

@functools.wraps(socket.socket)

1981

def socket_wrapper(*args, **kwargs):

1982

# Restore original function so subsequent calls are

1983

# not affected.

1984

socket.socket = self.socket_socket

1985

del self.socket_socket

1986

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

1987

# saved file descriptor.

1988

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

1989

# Replace socket.socket() function with wrapper

1990

socket.socket = socket_wrapper

1991

# The socketserver.TCPServer.__init__ will call

1992

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

1993

# socket_wrapper(), if socketfd was set.

1994

1560

socketserver.TCPServer.__init__(self, server_address,

1995

1561

RequestHandlerClass)

1996

1997

1562

def server_bind(self):

1998

1563

"""This overrides the normal server_bind() function

1999

1564

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

2005

1570

self.interface)

2006

1571

else:

2007

1572

try:

2008

self.socket.setsockopt(

2009

socket.SOL_SOCKET, SO_BINDTODEVICE,

2010

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

1573

self.socket.setsockopt(socket.SOL_SOCKET,

1574

SO_BINDTODEVICE,

1575

str(self.interface

1576

+ '\0'))

2011

1577

except socket.error as error:

2012

if error.errno == errno.EPERM:

2013

logger.error("No permission to bind to"

2014

" interface %s", self.interface)

2015

elif error.errno == errno.ENOPROTOOPT:

1578

if error[0] == errno.EPERM:

1579

logger.error("No permission to"

1580

" bind to interface %s",

1581

self.interface)

1582

elif error[0] == errno.ENOPROTOOPT:

2016

1583

logger.error("SO_BINDTODEVICE not available;"

2017

1584

" cannot bind to interface %s",

2018

1585

self.interface)

2019

elif error.errno == errno.ENODEV:

2020

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

2021

" cannot bind", self.interface)

2022

1586

else:

2023

1587

raise

2024

1588

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

2027

1591

if self.address_family == socket.AF_INET6:

2028

1592

any_address = "::" # in6addr_any

2029

1593

else:

2030

any_address = "0.0.0.0" # INADDR_ANY

1594

any_address = socket.INADDR_ANY

2031

1595

self.server_address = (any_address,

2032

1596

self.server_address[1])

2033

1597

elif not self.server_address[1]:

2034

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

1598

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

1599

0)

2035

1600

# if self.interface:

2036

1601

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

2037

1602

# 0, # port

2051

1616

2052

1617

Assumes a gobject.MainLoop event loop.

2053

1618

"""

2054

2055

1619

def __init__(self, server_address, RequestHandlerClass,

2056

interface=None,

2057

use_ipv6=True,

2058

clients=None,

2059

gnutls_priority=None,

2060

use_dbus=True,

2061

socketfd=None):

1620

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

1621

gnutls_priority=None, use_dbus=True):

2062

1622

self.enabled = False

2063

1623

self.clients = clients

2064

1624

if self.clients is None:

2065

self.clients = {}

1625

self.clients = set()

2066

1626

self.use_dbus = use_dbus

2067

1627

self.gnutls_priority = gnutls_priority

2068

1628

IPv6_TCPServer.__init__(self, server_address,

2069

1629

RequestHandlerClass,

2070

1630

interface = interface,

2071

use_ipv6 = use_ipv6,

2072

socketfd = socketfd)

2073

1631

use_ipv6 = use_ipv6)

2074

1632

def server_activate(self):

2075

1633

if self.enabled:

2076

1634

return socketserver.TCPServer.server_activate(self)

2080

1638

2081

1639

def add_pipe(self, parent_pipe, proc):

2082

1640

# Call "handle_ipc" for both data and EOF events

2083

gobject.io_add_watch(

2084

parent_pipe.fileno(),

2085

gobject.IO_IN | gobject.IO_HUP,

2086

functools.partial(self.handle_ipc,

2087

parent_pipe = parent_pipe,

2088

proc = proc))

1641

gobject.io_add_watch(parent_pipe.fileno(),

1642

gobject.IO_IN | gobject.IO_HUP,

1643

functools.partial(self.handle_ipc,

1644

parent_pipe =

1645

parent_pipe,

1646

proc = proc))

2089

1647

2090

def handle_ipc(self, source, condition,

2091

parent_pipe=None,

2092

proc = None,

2093

client_object=None):

1648

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

1649

proc = None, client_object=None):

1650

condition_names = {

1651

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

1652

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

1653

# blocking).

1654

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

1655

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

1656

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

1657

# broken, usually for pipes and

1658

# sockets).

1659

}

1660

conditions_string = ' | '.join(name

1661

for cond, name in

1662

condition_names.iteritems()

1663

if cond & condition)

2094

1664

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

2095

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

1665

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

2096

1666

# Wait for other process to exit

2097

1667

proc.join()

2098

1668

return False

2105

1675

fpr = request[1]

2106

1676

address = request[2]

2107

1677

2108

for c in self.clients.itervalues():

1678

for c in self.clients:

2109

1679

if c.fingerprint == fpr:

2110

1680

client = c

2111

1681

break

2119

1689

parent_pipe.send(False)

2120

1690

return False

2121

1691

2122

gobject.io_add_watch(

2123

parent_pipe.fileno(),

2124

gobject.IO_IN | gobject.IO_HUP,

2125

functools.partial(self.handle_ipc,

2126

parent_pipe = parent_pipe,

2127

proc = proc,

2128

client_object = client))

1692

gobject.io_add_watch(parent_pipe.fileno(),

1693

gobject.IO_IN | gobject.IO_HUP,

1694

functools.partial(self.handle_ipc,

1695

parent_pipe =

1696

parent_pipe,

1697

proc = proc,

1698

client_object =

1699

client))

2129

1700

parent_pipe.send(True)

2130

1701

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

2131

1702

# same fileno

2137

1708

2138

1709

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

2139

1710

funcname)(*args,

2140

**kwargs)))

1711

**kwargs)))

2141

1712

2142

1713

if command == 'getattr':

2143

1714

attrname = request[1]

2144

if isinstance(client_object.__getattribute__(attrname),

2145

collections.Callable):

2146

parent_pipe.send(('function', ))

1715

if callable(client_object.__getattribute__(attrname)):

1716

parent_pipe.send(('function',))

2147

1717

else:

2148

parent_pipe.send((

2149

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

1718

parent_pipe.send(('data', client_object

1719

.__getattribute__(attrname)))

2150

1720

2151

1721

if command == 'setattr':

2152

1722

attrname = request[1]

2156

1726

return True

2157

1727

2158

1728

2159

def rfc3339_duration_to_delta(duration):

2160

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

2161

2162

>>> rfc3339_duration_to_delta("P7D")

2163

datetime.timedelta(7)

2164

>>> rfc3339_duration_to_delta("PT60S")

2165

datetime.timedelta(0, 60)

2166

>>> rfc3339_duration_to_delta("PT60M")

2167

datetime.timedelta(0, 3600)

2168

>>> rfc3339_duration_to_delta("PT24H")

2169

datetime.timedelta(1)

2170

>>> rfc3339_duration_to_delta("P1W")

2171

datetime.timedelta(7)

2172

>>> rfc3339_duration_to_delta("PT5M30S")

2173

datetime.timedelta(0, 330)

2174

>>> rfc3339_duration_to_delta("P1DT3M20S")

2175

datetime.timedelta(1, 200)

2176

"""

2177

2178

# Parsing an RFC 3339 duration with regular expressions is not

2179

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

2180

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

2181

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

2182

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

2183

# avoid excessive use of external libraries.

2184

2185

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

2186

Token = collections.namedtuple("Token", (

2187

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

2188

# a "group" containing digits

2189

"value", # datetime.timedelta or None

2190

"followers")) # Tokens valid after this token

2191

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

2192

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

2193

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

2194

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

2195

datetime.timedelta(seconds=1),

2196

frozenset((token_end, )))

2197

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

2198

datetime.timedelta(minutes=1),

2199

frozenset((token_second, token_end)))

2200

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

2201

datetime.timedelta(hours=1),

2202

frozenset((token_minute, token_end)))

2203

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

2204

None,

2205

frozenset((token_hour, token_minute,

2206

token_second)))

2207

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

2208

datetime.timedelta(days=1),

2209

frozenset((token_time, token_end)))

2210

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

2211

datetime.timedelta(weeks=4),

2212

frozenset((token_day, token_end)))

2213

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

2214

datetime.timedelta(weeks=52),

2215

frozenset((token_month, token_end)))

2216

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

2217

datetime.timedelta(weeks=1),

2218

frozenset((token_end, )))

2219

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

2220

frozenset((token_year, token_month,

2221

token_day, token_time,

2222

token_week)))

2223

# Define starting values

2224

value = datetime.timedelta() # Value so far

2225

found_token = None

2226

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

2227

s = duration # String left to parse

2228

# Loop until end token is found

2229

while found_token is not token_end:

2230

# Search for any currently valid tokens

2231

for token in followers:

2232

match = token.regexp.match(s)

2233

if match is not None:

2234

# Token found

2235

if token.value is not None:

2236

# Value found, parse digits

2237

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

2238

# Add to value so far

2239

value += factor * token.value

2240

# Strip token from string

2241

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

2242

# Go to found token

2243

found_token = token

2244

# Set valid next tokens

2245

followers = found_token.followers

2246

break

2247

else:

2248

# No currently valid tokens were found

2249

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

2250

.format(duration))

2251

# End token found

2252

return value

2253

2254

2255

1729

def string_to_delta(interval):

2256

1730

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

2257

1731

2268

1742

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

2269

1743

datetime.timedelta(0, 330)

2270

1744

"""

2271

2272

try:

2273

return rfc3339_duration_to_delta(interval)

2274

except ValueError:

2275

pass

2276

2277

1745

timevalue = datetime.timedelta(0)

2278

1746

for s in interval.split():

2279

1747

try:

2280

suffix = s[-1]

1748

suffix = unicode(s[-1])

2281

1749

value = int(s[:-1])

2282

1750

if suffix == "d":

2283

1751

delta = datetime.timedelta(value)

2290

1758

elif suffix == "w":

2291

1759

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

2292

1760

else:

2293

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

2294

except IndexError as e:

1761

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

1762

except (ValueError, IndexError) as e:

2295

1763

raise ValueError(*(e.args))

2296

1764

timevalue += delta

2297

1765

return timevalue

2298

1766

2299

1767

1768

def if_nametoindex(interface):

1769

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

1770

1771

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

1772

global if_nametoindex

1773

try:

1774

if_nametoindex = (ctypes.cdll.LoadLibrary

1775

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

1776

.if_nametoindex)

1777

except (OSError, AttributeError):

1778

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

1779

def if_nametoindex(interface):

1780

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

1781

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

1782

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

1783

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1784

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

1785

interface))

1786

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

1787

ifreq[16:20])[0]

1788

return interface_index

1789

return if_nametoindex(interface)

1790

1791

2300

1792

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

2301

1793

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

2302

1794

2310

1802

sys.exit()

2311

1803

if not noclose:

2312

1804

# Close all standard open file descriptors

2313

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

1805

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

2314

1806

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

2315

1807

raise OSError(errno.ENODEV,

2316

"{} not a character device"

2317

.format(os.devnull))

1808

"%s not a character device"

1809

% os.path.devnull)

2318

1810

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

2319

1811

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

2320

1812

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

2329

1821

2330

1822

parser = argparse.ArgumentParser()

2331

1823

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

2332

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

1824

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

2333

1825

help="show version number and exit")

2334

1826

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

2335

1827

help="Bind to interface IF")

2341

1833

help="Run self-test")

2342

1834

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

2343

1835

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

2344

" to terminal", default=None)

1836

" to terminal")

2345

1837

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

2346

1838

help="Debug level for stdout output")

2347

1839

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

2354

1846

" files")

2355

1847

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

2356

1848

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

2357

" system bus interface", default=None)

1849

" system bus interface")

2358

1850

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

2359

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

2360

default=None)

2361

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

2362

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

2363

" state", default=None)

2364

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

2365

help="Specify a file descriptor to a network"

2366

" socket to use instead of creating one")

2367

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

2368

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

2369

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

2370

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

2371

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

2372

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

2373

default=None)

2374

1851

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

2375

1852

options = parser.parse_args()

2376

1853

2377

1854

if options.check:

2378

1855

import doctest

2379

fail_count, test_count = doctest.testmod()

2380

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

1856

doctest.testmod()

1857

sys.exit()

2381

1858

2382

1859

# Default values for config file for server-global settings

2383

1860

server_defaults = { "interface": "",

2385

1862

"port": "",

2386

1863

"debug": "False",

2387

1864

"priority":

2388

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

2389

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

1865

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

2390

1866

"servicename": "Mandos",

2391

1867

"use_dbus": "True",

2392

1868

"use_ipv6": "True",

2393

1869

"debuglevel": "",

2394

"restore": "True",

2395

"socket": "",

2396

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

2397

"foreground": "False",

2398

"zeroconf": "True",

2399

}

1870

}

2400

1871

2401

1872

# Parse config file for server-global settings

2402

1873

server_config = configparser.SafeConfigParser(server_defaults)

2403

1874

del server_defaults

2404

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

1875

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

1876

"mandos.conf"))

2405

1877

# Convert the SafeConfigParser object to a dict

2406

1878

server_settings = server_config.defaults()

2407

1879

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

2408

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

1880

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

2409

1881

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

2410

1882

option)

2411

1883

if server_settings["port"]:

2412

1884

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

2413

1885

"port")

2414

if server_settings["socket"]:

2415

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

2416

"socket")

2417

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

2418

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

2419

# happen with a supplied network socket.

2420

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

2421

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

2422

["socket"])

2423

1886

del server_config

2424

1887

2425

1888

# Override the settings from the config file with command line

2426

1889

# options, if set.

2427

1890

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

2428

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

2429

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

2430

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

1891

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

1892

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

2431

1893

value = getattr(options, option)

2432

1894

if value is not None:

2433

1895

server_settings[option] = value

2434

1896

del options

2435

1897

# Force all strings to be unicode

2436

1898

for option in server_settings.keys():

2437

if isinstance(server_settings[option], bytes):

2438

server_settings[option] = (server_settings[option]

2439

.decode("utf-8"))

2440

# Force all boolean options to be boolean

2441

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

2442

"foreground", "zeroconf"):

2443

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

2444

# Debug implies foreground

2445

if server_settings["debug"]:

2446

server_settings["foreground"] = True

1899

if type(server_settings[option]) is str:

1900

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

2447

1901

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

2448

1902

2449

1903

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

2450

1904

2451

if (not server_settings["zeroconf"]

2452

and not (server_settings["port"]

2453

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

2454

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

2455

2456

1905

# For convenience

2457

1906

debug = server_settings["debug"]

2458

1907

debuglevel = server_settings["debuglevel"]

2459

1908

use_dbus = server_settings["use_dbus"]

2460

1909

use_ipv6 = server_settings["use_ipv6"]

2461

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

2462

stored_state_file)

2463

foreground = server_settings["foreground"]

2464

zeroconf = server_settings["zeroconf"]

2465

2466

if debug:

2467

initlogger(debug, logging.DEBUG)

2468

else:

2469

if not debuglevel:

2470

initlogger(debug)

2471

else:

2472

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

2473

initlogger(debug, level)

2474

1910

2475

1911

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

2476

syslogger.setFormatter(

2477

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

2478

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

2479

server_settings["servicename"])))

1912

syslogger.setFormatter(logging.Formatter

1913

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

1914

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

1915

% server_settings["servicename"]))

2480

1916

2481

1917

# Parse config file with clients

2482

client_config = configparser.SafeConfigParser(Client

2483

.client_defaults)

1918

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

1919

"extended_timeout": "15m",

1920

"interval": "2m",

1921

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

1922

"host": "",

1923

"approval_delay": "0s",

1924

"approval_duration": "1s",

1925

}

1926

client_config = configparser.SafeConfigParser(client_defaults)

2484

1927

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

2485

1928

"clients.conf"))

2486

1929

2487

1930

global mandos_dbus_service

2488

1931

mandos_dbus_service = None

2489

1932

2490

socketfd = None

2491

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

2492

socketfd = server_settings["socket"]

2493

tcp_server = MandosServer(

2494

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

2495

ClientHandler,

2496

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

2497

use_ipv6=use_ipv6,

2498

gnutls_priority=server_settings["priority"],

2499

use_dbus=use_dbus,

2500

socketfd=socketfd)

2501

if not foreground:

2502

pidfilename = "/run/mandos.pid"

2503

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

2504

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

2505

pidfile = None

1933

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

1934

server_settings["port"]),

1935

ClientHandler,

1936

interface=(server_settings["interface"]

1937

or None),

1938

use_ipv6=use_ipv6,

1939

gnutls_priority=

1940

server_settings["priority"],

1941

use_dbus=use_dbus)

1942

if not debug:

1943

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

2506

1944

try:

2507

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

2508

except IOError as e:

2509

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

2510

exc_info=e)

1945

pidfile = open(pidfilename, "w")

1946

except IOError:

1947

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

2511

1948

2512

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

1949

try:

1950

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

1951

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

1952

except KeyError:

2513

1953

try:

2514

uid = pwd.getpwnam(name).pw_uid

2515

gid = pwd.getpwnam(name).pw_gid

2516

break

1954

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

1955

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

2517

1956

except KeyError:

2518

continue

2519

else:

2520

uid = 65534

2521

gid = 65534

1957

try:

1958

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

1959

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

1960

except KeyError:

1961

uid = 65534

1962

gid = 65534

2522

1963

try:

2523

1964

os.setgid(gid)

2524

1965

os.setuid(uid)

2525

1966

except OSError as error:

2526

if error.errno != errno.EPERM:

2527

raise

1967

if error[0] != errno.EPERM:

1968

raise error

1969

1970

if not debug and not debuglevel:

1971

syslogger.setLevel(logging.WARNING)

1972

console.setLevel(logging.WARNING)

1973

if debuglevel:

1974

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

1975

syslogger.setLevel(level)

1976

console.setLevel(level)

2528

1977

2529

1978

if debug:

2530

1979

# Enable all possible GnuTLS debugging

2537

1986

def debug_gnutls(level, string):

2538

1987

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

2539

1988

2540

gnutls.library.functions.gnutls_global_set_log_function(

2541

debug_gnutls)

1989

(gnutls.library.functions

1990

.gnutls_global_set_log_function(debug_gnutls))

2542

1991

2543

1992

# Redirect stdin so all checkers get /dev/null

2544

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

1993

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

2545

1994

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

2546

1995

if null > 2:

2547

1996

os.close(null)

1997

else:

1998

# No console logging

1999

logger.removeHandler(console)

2548

2000

2549

2001

# Need to fork before connecting to D-Bus

2550

if not foreground:

2002

if not debug:

2551

2003

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

2552

2004

daemon()

2553

2005

2554

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

2555

# need to inform gobject that threads will be used.

2556

gobject.threads_init()

2557

2558

2006

global main_loop

2559

2007

# From the Avahi example code

2560

DBusGMainLoop(set_as_default=True)

2008

DBusGMainLoop(set_as_default=True )

2561

2009

main_loop = gobject.MainLoop()

2562

2010

bus = dbus.SystemBus()

2563

2011

# End of Avahi example code

2564

2012

if use_dbus:

2565

2013

try:

2566

2014

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

2567

bus,

2568

do_not_queue=True)

2569

old_bus_name = dbus.service.BusName(

2570

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

2571

do_not_queue=True)

2572

except dbus.exceptions.DBusException as e:

2573

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

2015

bus, do_not_queue=True)

2016

old_bus_name = (dbus.service.BusName

2017

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

2018

do_not_queue=True))

2019

except dbus.exceptions.NameExistsException as e:

2020

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

2574

2021

use_dbus = False

2575

2022

server_settings["use_dbus"] = False

2576

2023

tcp_server.use_dbus = False

2577

if zeroconf:

2578

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2579

service = AvahiServiceToSyslog(

2580

name = server_settings["servicename"],

2581

servicetype = "_mandos._tcp",

2582

protocol = protocol,

2583

bus = bus)

2584

if server_settings["interface"]:

2585

service.interface = if_nametoindex(

2586

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

2024

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2025

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

2026

servicetype = "_mandos._tcp",

2027

protocol = protocol, bus = bus)

2028

if server_settings["interface"]:

2029

service.interface = (if_nametoindex

2030

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

2587

2031

2588

2032

global multiprocessing_manager

2589

2033

multiprocessing_manager = multiprocessing.Manager()

2590

2034

2591

2035

client_class = Client

2592

2036

if use_dbus:

2593

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

2594

2595

client_settings = Client.config_parser(client_config)

2596

old_client_settings = {}

2597

clients_data = {}

2598

2599

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

2600

global wnull

2601

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

2602

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

2603

# mode

2604

if debug or not foreground:

2605

wnull.close()

2606

2607

# Get client data and settings from last running state.

2608

if server_settings["restore"]:

2609

try:

2610

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

2611

clients_data, old_client_settings = pickle.load(

2612

stored_state)

2613

os.remove(stored_state_path)

2614

except IOError as e:

2615

if e.errno == errno.ENOENT:

2616

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

2617

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

2618

else:

2619

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

2620

exc_info=e)

2621

raise

2622

except EOFError as e:

2623

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

2624

"EOFError:",

2625

exc_info=e)

2626

2627

with PGPEngine() as pgp:

2628

for client_name, client in clients_data.items():

2629

# Skip removed clients

2630

if client_name not in client_settings:

2631

continue

2632

2633

# Decide which value to use after restoring saved state.

2634

# We have three different values: Old config file,

2635

# new config file, and saved state.

2636

# New config value takes precedence if it differs from old

2637

# config value, otherwise use saved state.

2638

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

2639

try:

2640

# For each value in new config, check if it

2641

# differs from the old config value (Except for

2642

# the "secret" attribute)

2643

if (name != "secret"

2644

and (value !=

2645

old_client_settings[client_name][name])):

2646

client[name] = value

2647

except KeyError:

2648

pass

2649

2650

# Clients who has passed its expire date can still be

2651

# enabled if its last checker was successful. A Client

2652

# whose checker succeeded before we stored its state is

2653

# assumed to have successfully run all checkers during

2654

# downtime.

2655

if client["enabled"]:

2656

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

2657

if not client["last_checked_ok"]:

2658

logger.warning(

2659

"disabling client {} - Client never "

2660

"performed a successful checker".format(

2661

client_name))

2662

client["enabled"] = False

2663

elif client["last_checker_status"] != 0:

2664

logger.warning(

2665

"disabling client {} - Client last"

2666

" checker failed with error code"

2667

" {}".format(

2668

client_name,

2669

client["last_checker_status"]))

2670

client["enabled"] = False

2671

else:

2672

client["expires"] = (

2673

datetime.datetime.utcnow()

2674

+ client["timeout"])

2675

logger.debug("Last checker succeeded,"

2676

" keeping {} enabled".format(

2677

client_name))

2037

client_class = functools.partial(ClientDBusTransitional,

2038

bus = bus)

2039

def client_config_items(config, section):

2040

special_settings = {

2041

"approved_by_default":

2042

lambda: config.getboolean(section,

2043

"approved_by_default"),

2044

}

2045

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

2678

2046

try:

2679

client["secret"] = pgp.decrypt(

2680

client["encrypted_secret"],

2681

client_settings[client_name]["secret"])

2682

except PGPError:

2683

# If decryption fails, we use secret from new settings

2684

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

2685

client_name))

2686

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

2687

["secret"])

2688

2689

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

2690

for client_name in (set(old_client_settings)

2691

- set(client_settings)):

2692

del clients_data[client_name]

2693

for client_name in (set(client_settings)

2694

- set(old_client_settings)):

2695

clients_data[client_name] = client_settings[client_name]

2696

2697

# Create all client objects

2698

for client_name, client in clients_data.items():

2699

tcp_server.clients[client_name] = client_class(

2700

name = client_name,

2701

settings = client,

2702

server_settings = server_settings)

2703

2047

yield (name, special_settings[name]())

2048

except KeyError:

2049

yield (name, value)

2050

2051

tcp_server.clients.update(set(

2052

client_class(name = section,

2053

config= dict(client_config_items(

2054

client_config, section)))

2055

for section in client_config.sections()))

2704

2056

if not tcp_server.clients:

2705

2057

logger.warning("No clients defined")

2706

2707

if not foreground:

2708

if pidfile is not None:

2709

pid = os.getpid()

2710

try:

2711

with pidfile:

2712

print(pid, file=pidfile)

2713

except IOError:

2714

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

2715

pidfilename, pid)

2716

del pidfile

2058

2059

if not debug:

2060

try:

2061

with pidfile:

2062

pid = os.getpid()

2063

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

2064

del pidfile

2065

except IOError:

2066

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

2067

pidfilename, pid)

2068

except NameError:

2069

# "pidfile" was never created

2070

pass

2717

2071

del pidfilename

2072

2073

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

2718

2074

2719

2075

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

2720

2076

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

2721

2077

2722

2078

if use_dbus:

2723

2724

@alternate_dbus_interfaces(

2725

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

2726

class MandosDBusService(DBusObjectWithProperties):

2079

class MandosDBusService(dbus.service.Object):

2727

2080

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

2728

2729

2081

def __init__(self):

2730

2082

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

2731

2732

2083

_interface = "se.recompile.Mandos"

2733

2084

2734

@dbus_interface_annotations(_interface)

2735

def _foo(self):

2736

return {

2737

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

2738

"false" }

2739

2740

2085

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

2741

2086

def ClientAdded(self, objpath):

2742

2087

"D-Bus signal"

2755

2100

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

2756

2101

def GetAllClients(self):

2757

2102

"D-Bus method"

2758

return dbus.Array(c.dbus_object_path for c in

2759

tcp_server.clients.itervalues())

2103

return dbus.Array(c.dbus_object_path

2104

for c in tcp_server.clients)

2760

2105

2761

2106

@dbus.service.method(_interface,

2762

2107

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

2763

2108

def GetAllClientsWithProperties(self):

2764

2109

"D-Bus method"

2765

2110

return dbus.Dictionary(

2766

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

2767

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

2111

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

2112

for c in tcp_server.clients),

2768

2113

signature="oa{sv}")

2769

2114

2770

2115

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

2771

2116

def RemoveClient(self, object_path):

2772

2117

"D-Bus method"

2773

for c in tcp_server.clients.itervalues():

2118

for c in tcp_server.clients:

2774

2119

if c.dbus_object_path == object_path:

2775

del tcp_server.clients[c.name]

2120

tcp_server.clients.remove(c)

2776

2121

c.remove_from_connection()

2777

2122

# Don't signal anything except ClientRemoved

2778

2123

c.disable(quiet=True)

2783

2128

2784

2129

del _interface

2785

2130

2786

mandos_dbus_service = MandosDBusService()

2131

class MandosDBusServiceTransitional(MandosDBusService):

2132

__metaclass__ = AlternateDBusNamesMetaclass

2133

mandos_dbus_service = MandosDBusServiceTransitional()

2787

2134

2788

2135

def cleanup():

2789

2136

"Cleanup function; run on exit"

2790

if zeroconf:

2791

service.cleanup()

2137

service.cleanup()

2792

2138

2793

2139

multiprocessing.active_children()

2794

wnull.close()

2795

if not (tcp_server.clients or client_settings):

2796

return

2797

2798

# Store client before exiting. Secrets are encrypted with key

2799

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

2800

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

2801

clients = {}

2802

with PGPEngine() as pgp:

2803

for client in tcp_server.clients.itervalues():

2804

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

2805

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

2806

key)

2807

client_dict = {}

2808

2809

# A list of attributes that can not be pickled

2810

# + secret.

2811

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

2812

"checker", "server_settings" }

2813

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

2814

.Object):

2815

exclude.add(name)

2816

2817

client_dict["encrypted_secret"] = (client

2818

.encrypted_secret)

2819

for attr in client.client_structure:

2820

if attr not in exclude:

2821

client_dict[attr] = getattr(client, attr)

2822

2823

clients[client.name] = client_dict

2824

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

2825

2826

try:

2827

with tempfile.NamedTemporaryFile(

2828

mode='wb',

2829

suffix=".pickle",

2830

prefix='clients-',

2831

dir=os.path.dirname(stored_state_path),

2832

delete=False) as stored_state:

2833

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

2834

tempname = stored_state.name

2835

os.rename(tempname, stored_state_path)

2836

except (IOError, OSError) as e:

2837

if not debug:

2838

try:

2839

os.remove(tempname)

2840

except NameError:

2841

pass

2842

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

2843

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

2844

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

2845

else:

2846

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

2847

exc_info=e)

2848

raise

2849

2850

# Delete all clients, and settings from config

2851

2140

while tcp_server.clients:

2852

name, client = tcp_server.clients.popitem()

2141

client = tcp_server.clients.pop()

2853

2142

if use_dbus:

2854

2143

client.remove_from_connection()

2144

client.disable_hook = None

2855

2145

# Don't signal anything except ClientRemoved

2856

2146

client.disable(quiet=True)

2857

2147

if use_dbus:

2858

2148

# Emit D-Bus signal

2859

mandos_dbus_service.ClientRemoved(

2860

client.dbus_object_path, client.name)

2861

client_settings.clear()

2149

mandos_dbus_service.ClientRemoved(client

2150

.dbus_object_path,

2151

client.name)

2862

2152

2863

2153

atexit.register(cleanup)

2864

2154

2865

for client in tcp_server.clients.itervalues():

2155

for client in tcp_server.clients:

2866

2156

if use_dbus:

2867

2157

# Emit D-Bus signal

2868

2158

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2869

# Need to initiate checking of clients

2870

if client.enabled:

2871

client.init_checker()

2159

client.enable()

2872

2160

2873

2161

tcp_server.enable()

2874

2162

tcp_server.server_activate()

2875

2163

2876

2164

# Find out what port we got

2877

if zeroconf:

2878

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

2165

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

2879

2166

if use_ipv6:

2880

2167

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

2881

" flowinfo %d, scope_id %d",

2882

*tcp_server.socket.getsockname())

2168

" flowinfo %d, scope_id %d"

2169

% tcp_server.socket.getsockname())

2883

2170

else: # IPv4

2884

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

2885

*tcp_server.socket.getsockname())

2171

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

2172

% tcp_server.socket.getsockname())

2886

2173

2887

2174

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

2888

2175

2889

2176

try:

2890

if zeroconf:

2891

# From the Avahi example code

2892

try:

2893

service.activate()

2894

except dbus.exceptions.DBusException as error:

2895

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

2896

cleanup()

2897

sys.exit(1)

2898

# End of Avahi example code

2177

# From the Avahi example code

2178

try:

2179

service.activate()

2180

except dbus.exceptions.DBusException as error:

2181

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

2182

cleanup()

2183

sys.exit(1)

2184

# End of Avahi example code

2899

2185

2900

2186

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

2901

2187

lambda *args, **kwargs:

2905

2191

logger.debug("Starting main loop")

2906

2192

main_loop.run()

2907

2193

except AvahiError as error:

2908

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

2194

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

2909

2195

cleanup()

2910

2196

sys.exit(1)

2911

2197

except KeyboardInterrupt: