/mandos/trunk : revision 505.1.13

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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,

376

dbus.exceptions.DBusException):

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dbus.exceptions.DBusException) as e:

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pass

378

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self.group = None

379

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self.remove()

380

381

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

382

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

383

234

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

384

bad_states = {

385

avahi.SERVER_INVALID: "Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION: "Zeroconf server name collision",

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avahi.SERVER_FAILURE: "Zeroconf server failure",

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}

235

bad_states = { avahi.SERVER_INVALID:

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"Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION:

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"Zeroconf server name collision",

240

avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

390

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if state in bad_states:

391

243

if bad_states[state] is not None:

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if error is None:

395

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

396

248

self.cleanup()

397

249

elif state == avahi.SERVER_RUNNING:

398

try:

399

self.add()

400

except dbus.exceptions.DBusException as error:

401

if (error.get_dbus_name()

402

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

403

logger.info("Local Zeroconf service name"

404

" collision.")

405

return self.rename(remove=False)

406

else:

407

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

408

self.cleanup()

409

os._exit(1)

250

self.add()

410

251

else:

411

252

if error is None:

412

253

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

413

254

else:

414

255

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

415

416

256

def activate(self):

417

257

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

418

258

if self.server is None:

422

262

follow_name_owner_changes=True),

423

263

avahi.DBUS_INTERFACE_SERVER)

424

264

self.server.connect_to_signal("StateChanged",

425

self.server_state_changed)

265

self.server_state_changed)

426

266

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

427

267

428

268

429

class AvahiServiceToSyslog(AvahiService):

430

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

431

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

432

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

433

syslogger.setFormatter(logging.Formatter(

434

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

435

.format(self.name)))

436

return ret

437

438

def call_pipe(connection, # : multiprocessing.Connection

439

func, *args, **kwargs):

440

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

441

442

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

443

return value on the provided multiprocessing.Connection.

444

"""

445

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

446

connection.close()

447

269

def _timedelta_to_milliseconds(td):

270

"Convert a datetime.timedelta() to milliseconds"

271

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

272

+ (td.seconds * 1000)

273

+ (td.microseconds // 1000))

274

448

275

class Client(object):

449

276

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

450

277

451

278

Attributes:

452

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

279

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

453

280

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

454

281

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

455

282

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

462

289

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

463

290

checker_initiator_tag: a gobject event source tag, or None

464

291

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

465

client_structure: Object describing what attributes a client has

466

and is used for storing the client at exit

467

292

current_checker_command: string; current running checker_command

293

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

468

294

disable_initiator_tag: a gobject event source tag, or None

469

295

enabled: bool()

470

296

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

473

299

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

474

300

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

475

301

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

476

last_checker_status: integer between 0 and 255 reflecting exit

477

status of last checker. -1 reflects crashed

478

checker, -2 means no checker completed yet.

479

last_checker_signal: The signal which killed the last checker, if

480

last_checker_status is -1

481

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

302

last_enabled: datetime.datetime(); (UTC)

482

303

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

483

304

D-Bus identifiers

484

305

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

485

306

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

486

307

until this client is disabled

487

extended_timeout: extra long timeout when secret has been sent

308

extended_timeout: extra long timeout when password has been sent

488

309

runtime_expansions: Allowed attributes for runtime expansion.

489

310

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

490

311

disabled, or None

491

server_settings: The server_settings dict from main()

492

312

"""

493

313

494

314

runtime_expansions = ("approval_delay", "approval_duration",

495

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

496

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

497

"last_approval_request", "last_checked_ok",

315

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

316

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

498

317

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

499

client_defaults = {

500

"timeout": "PT5M",

501

"extended_timeout": "PT15M",

502

"interval": "PT2M",

503

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

504

"host": "",

505

"approval_delay": "PT0S",

506

"approval_duration": "PT1S",

507

"approved_by_default": "True",

508

"enabled": "True",

509

}

510

511

@staticmethod

512

def config_parser(config):

513

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

514

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

515

with exceptions for any special settings as defined above.

516

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

517

value given the same arguments.

518

"""

519

settings = {}

520

for client_name in config.sections():

521

section = dict(config.items(client_name))

522

client = settings[client_name] = {}

523

524

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

525

# Reformat values from string types to Python types

526

client["approved_by_default"] = config.getboolean(

527

client_name, "approved_by_default")

528

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

529

"enabled")

530

531

# Uppercase and remove spaces from fingerprint for later

532

# comparison purposes with return value from the

533

# fingerprint() function

534

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

535

.replace(" ", ""))

536

if "secret" in section:

537

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

538

elif "secfile" in section:

539

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

540

(section["secfile"])),

541

"rb") as secfile:

542

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

543

else:

544

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

545

.format(section))

546

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

547

client["extended_timeout"] = string_to_delta(

548

section["extended_timeout"])

549

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

550

client["approval_delay"] = string_to_delta(

551

section["approval_delay"])

552

client["approval_duration"] = string_to_delta(

553

section["approval_duration"])

554

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

555

client["last_approval_request"] = None

556

client["last_checked_ok"] = None

557

client["last_checker_status"] = -2

558

559

return settings

560

561

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

318

319

def timeout_milliseconds(self):

320

"Return the 'timeout' attribute in milliseconds"

321

return _timedelta_to_milliseconds(self.timeout)

322

323

def extended_timeout_milliseconds(self):

324

"Return the 'extended_timeout' attribute in milliseconds"

325

return _timedelta_to_milliseconds(self.extended_timeout)

326

327

def interval_milliseconds(self):

328

"Return the 'interval' attribute in milliseconds"

329

return _timedelta_to_milliseconds(self.interval)

330

331

def approval_delay_milliseconds(self):

332

return _timedelta_to_milliseconds(self.approval_delay)

333

334

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

335

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

336

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

337

attribute."""

562

338

self.name = name

563

if server_settings is None:

564

server_settings = {}

565

self.server_settings = server_settings

566

# adding all client settings

567

for setting, value in settings.items():

568

setattr(self, setting, value)

569

570

if self.enabled:

571

if not hasattr(self, "last_enabled"):

572

self.last_enabled = datetime.datetime.utcnow()

573

if not hasattr(self, "expires"):

574

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

575

+ self.timeout)

576

else:

577

self.last_enabled = None

578

self.expires = None

579

339

if config is None:

340

config = {}

580

341

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

342

# Uppercase and remove spaces from fingerprint for later

343

# comparison purposes with return value from the fingerprint()

344

# function

345

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

346

.replace(" ", ""))

581

347

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

582

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

583

datetime.datetime.utcnow())

584

585

# attributes specific for this server instance

348

if "secret" in config:

349

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

350

elif "secfile" in config:

351

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

352

(config["secfile"])),

353

"rb") as secfile:

354

self.secret = secfile.read()

355

else:

356

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

357

% self.name)

358

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

359

self.created = datetime.datetime.utcnow()

360

self.enabled = False

361

self.last_approval_request = None

362

self.last_enabled = None

363

self.last_checked_ok = None

364

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

365

self.extended_timeout = string_to_delta(config

366

["extended_timeout"])

367

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

368

self.disable_hook = disable_hook

586

369

self.checker = None

587

370

self.checker_initiator_tag = None

588

371

self.disable_initiator_tag = None

372

self.expires = None

589

373

self.checker_callback_tag = None

374

self.checker_command = config["checker"]

590

375

self.current_checker_command = None

591

self.approved = None

376

self.last_connect = None

377

self._approved = None

378

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

379

True)

592

380

self.approvals_pending = 0

593

self.changedstate = multiprocessing_manager.Condition(

594

multiprocessing_manager.Lock())

595

self.client_structure = [attr

596

for attr in self.__dict__.iterkeys()

597

if not attr.startswith("_")]

598

self.client_structure.append("client_structure")

599

600

for name, t in inspect.getmembers(

601

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

602

if not name.startswith("_"):

603

self.client_structure.append(name)

381

self.approval_delay = string_to_delta(

382

config["approval_delay"])

383

self.approval_duration = string_to_delta(

384

config["approval_duration"])

385

self.changedstate = (multiprocessing_manager

386

.Condition(multiprocessing_manager

387

.Lock()))

604

388

605

# Send notice to process children that client state has changed

606

389

def send_changedstate(self):

607

with self.changedstate:

608

self.changedstate.notify_all()

390

self.changedstate.acquire()

391

self.changedstate.notify_all()

392

self.changedstate.release()

609

393

610

394

def enable(self):

611

395

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

612

396

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

613

397

# Already enabled

614

398

return

399

self.send_changedstate()

400

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

401

# and every interval from then on.

402

self.checker_initiator_tag = (gobject.timeout_add

403

(self.interval_milliseconds(),

404

self.start_checker))

405

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

615

406

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

407

self.disable_initiator_tag = (gobject.timeout_add

408

(self.timeout_milliseconds(),

409

self.disable))

616

410

self.enabled = True

617

411

self.last_enabled = datetime.datetime.utcnow()

618

self.init_checker()

619

self.send_changedstate()

412

# Also start a new checker *right now*.

413

self.start_checker()

620

414

621

415

def disable(self, quiet=True):

622

416

"""Disable this client."""

623

417

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

624

418

return False

625

419

if not quiet:

420

self.send_changedstate()

421

if not quiet:

626

422

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

627

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

423

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

628

424

gobject.source_remove(self.disable_initiator_tag)

629

425

self.disable_initiator_tag = None

630

426

self.expires = None

631

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

427

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

632

428

gobject.source_remove(self.checker_initiator_tag)

633

429

self.checker_initiator_tag = None

634

430

self.stop_checker()

431

if self.disable_hook:

432

self.disable_hook(self)

635

433

self.enabled = False

636

if not quiet:

637

self.send_changedstate()

638

434

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

639

435

return False

640

436

641

437

def __del__(self):

438

self.disable_hook = None

642

439

self.disable()

643

440

644

def init_checker(self):

645

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

646

# and every interval from then on.

647

if self.checker_initiator_tag is not None:

648

gobject.source_remove(self.checker_initiator_tag)

649

self.checker_initiator_tag = gobject.timeout_add(

650

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

651

self.start_checker)

652

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

653

if self.disable_initiator_tag is not None:

654

gobject.source_remove(self.disable_initiator_tag)

655

self.disable_initiator_tag = gobject.timeout_add(

656

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

657

# Also start a new checker *right now*.

658

self.start_checker()

659

660

def checker_callback(self, source, condition, connection,

661

command):

441

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

662

442

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

663

443

self.checker_callback_tag = None

664

444

self.checker = None

665

# Read return code from connection (see call_pipe)

666

returncode = connection.recv()

667

connection.close()

668

669

if returncode >= 0:

670

self.last_checker_status = returncode

671

self.last_checker_signal = None

672

if self.last_checker_status == 0:

445

if os.WIFEXITED(condition):

446

exitstatus = os.WEXITSTATUS(condition)

447

if exitstatus == 0:

673

448

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

674

449

vars(self))

675

450

self.checked_ok()

676

451

else:

677

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

452

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

453

vars(self))

678

454

else:

679

self.last_checker_status = -1

680

self.last_checker_signal = -returncode

681

455

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

682

456

vars(self))

683

return False

684

685

def checked_ok(self):

686

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

687

self.last_checked_ok = datetime.datetime.utcnow()

688

self.last_checker_status = 0

689

self.last_checker_signal = None

690

self.bump_timeout()

691

692

def bump_timeout(self, timeout=None):

693

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

457

458

def checked_ok(self, timeout=None):

459

"""Bump up the timeout for this client.

460

461

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

462

alive and well.

463

"""

694

464

if timeout is None:

695

465

timeout = self.timeout

696

if self.disable_initiator_tag is not None:

697

gobject.source_remove(self.disable_initiator_tag)

698

self.disable_initiator_tag = None

699

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

700

self.disable_initiator_tag = gobject.timeout_add(

701

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

702

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

703

472

704

473

def need_approval(self):

705

474

self.last_approval_request = datetime.datetime.utcnow()

710

479

If a checker already exists, leave it running and do

711

480

nothing."""

712

481

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

713

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

714

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

715

# would inevitably timeout, since no checker would get a

716

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

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

717

486

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

718

487

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

719

488

# should be.

720

489

721

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

722

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

723

self.checker.join()

724

self.checker = None

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)

725

503

# Start a new checker if needed

726

504

if self.checker is None:

727

# Escape attributes for the shell

728

escaped_attrs = {

729

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

730

for attr in self.runtime_expansions }

731

505

try:

732

command = self.checker_command % escaped_attrs

733

except TypeError as error:

734

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

735

self.checker_command,

736

exc_info=error)

737

return True # Try again later

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

738

524

self.current_checker_command = command

739

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

740

self.name)

741

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

742

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

743

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

744

# always replaced by /dev/null.)

745

# The exception is when not debugging but nevertheless

746

# running in the foreground; use the previously

747

# created wnull.

748

popen_args = { "close_fds": True,

749

"shell": True,

750

"cwd": "/" }

751

if (not self.server_settings["debug"]

752

and self.server_settings["foreground"]):

753

popen_args.update({"stdout": wnull,

754

"stderr": wnull })

755

pipe = multiprocessing.Pipe(duplex = False)

756

self.checker = multiprocessing.Process(

757

target = call_pipe,

758

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

759

kwargs = popen_args)

760

self.checker.start()

761

self.checker_callback_tag = gobject.io_add_watch(

762

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

763

self.checker_callback, pipe[0], command)

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)

764

548

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

765

549

return True

766

550

772

556

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

773

557

return

774

558

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

775

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

776

567

self.checker = None

777

568

778

569

779

def dbus_service_property(dbus_interface,

780

signature="v",

781

access="readwrite",

782

byte_arrays=False):

570

def dbus_service_property(dbus_interface, signature="v",

571

access="readwrite", byte_arrays=False):

783

572

"""Decorators for marking methods of a DBusObjectWithProperties to

784

573

become properties on the D-Bus.

785

574

794

583

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

795

584

if byte_arrays and signature != "ay":

796

585

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

797

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

798

586

" signature %r" % signature)

799

587

def decorator(func):

800

588

func._dbus_is_property = True

801

589

func._dbus_interface = dbus_interface

806

594

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

807

595

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

808

596

return func

809

810

return decorator

811

812

813

def dbus_interface_annotations(dbus_interface):

814

"""Decorator for marking functions returning interface annotations

815

816

Usage:

817

818

@dbus_interface_annotations("org.example.Interface")

819

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

820

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

821

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

822

"false"}

823

"""

824

825

def decorator(func):

826

func._dbus_is_interface = True

827

func._dbus_interface = dbus_interface

828

func._dbus_name = dbus_interface

829

return func

830

831

return decorator

832

833

834

def dbus_annotations(annotations):

835

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

836

Usage:

837

838

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

839

"org.freedesktop.DBus.Property."

840

"EmitsChangedSignal": "false"})

841

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

842

access="r")

843

def Property_dbus_property(self):

844

return dbus.Boolean(False)

845

"""

846

847

def decorator(func):

848

func._dbus_annotations = annotations

849

return func

850

851

597

return decorator

852

598

853

599

854

600

class DBusPropertyException(dbus.exceptions.DBusException):

855

601

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

856

602

"""

857

pass

603

def __unicode__(self):

604

return unicode(str(self))

858

605

859

606

860

607

class DBusPropertyAccessException(DBusPropertyException):

878

625

"""

879

626

880

627

@staticmethod

881

def _is_dbus_thing(thing):

882

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

883

884

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

885

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

886

"""

887

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

888

False)

628

def _is_dbus_property(obj):

629

return getattr(obj, "_dbus_is_property", False)

889

630

890

def _get_all_dbus_things(self, thing):

631

def _get_all_dbus_properties(self):

891

632

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

892

633

"""

893

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

894

athing.__get__(self))

634

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

895

635

for cls in self.__class__.__mro__

896

for name, athing in

897

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

636

for name, prop in

637

inspect.getmembers(cls, self._is_dbus_property))

898

638

899

639

def _get_dbus_property(self, interface_name, property_name):

900

640

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

901

641

property with the specified name and interface.

902

642

"""

903

for cls in self.__class__.__mro__:

904

for name, value in inspect.getmembers(

905

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)):

906

646

if (value._dbus_name == property_name

907

647

and value._dbus_interface == interface_name):

908

648

return value.__get__(self)

909

649

910

650

# No such property

911

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

912

self.dbus_object_path, interface_name, property_name))

651

raise DBusPropertyNotFound(self.dbus_object_path + ":"

652

+ interface_name + "."

653

+ property_name)

913

654

914

@dbus.service.method(dbus.PROPERTIES_IFACE,

915

in_signature="ss",

655

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

916

656

out_signature="v")

917

657

def Get(self, interface_name, property_name):

918

658

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

936

676

# The byte_arrays option is not supported yet on

937

677

# signatures other than "ay".

938

678

if prop._dbus_signature != "ay":

939

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

940

"'ay' signature {!r}"

941

.format(prop._dbus_signature))

942

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

943

for byte in value))

679

raise ValueError

680

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

681

for byte in value))

944

682

prop(value)

945

683

946

@dbus.service.method(dbus.PROPERTIES_IFACE,

947

in_signature="s",

684

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

948

685

out_signature="a{sv}")

949

686

def GetAll(self, interface_name):

950

687

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

952

689

953

690

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

954

691

"""

955

properties = {}

956

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

692

all = {}

693

for name, prop in self._get_all_dbus_properties():

957

694

if (interface_name

958

695

and interface_name != prop._dbus_interface):

959

696

# Interface non-empty but did not match

963

700

continue

964

701

value = prop()

965

702

if not hasattr(value, "variant_level"):

966

properties[name] = value

703

all[name] = value

967

704

continue

968

properties[name] = type(value)(

969

value, variant_level = value.variant_level + 1)

970

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

971

972

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

973

def PropertiesChanged(self, interface_name, changed_properties,

974

invalidated_properties):

975

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

976

standard.

977

"""

978

pass

705

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

706

value.variant_level+1)

707

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

979

708

980

709

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

981

710

out_signature="s",

982

711

path_keyword='object_path',

983

712

connection_keyword='connection')

984

713

def Introspect(self, object_path, connection):

985

"""Overloading of standard D-Bus method.

986

987

Inserts property tags and interface annotation tags.

714

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

988

715

"""

989

716

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

990

717

connection)

991

718

try:

992

719

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

993

994

720

def make_tag(document, name, prop):

995

721

e = document.createElement("property")

996

722

e.setAttribute("name", name)

997

723

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

998

724

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

999

725

return e

1000

1001

726

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

1002

# Add property tags

1003

727

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

1004

728

for name, prop

1005

in self._get_all_dbus_things("property")

729

in self._get_all_dbus_properties()

1006

730

if prop._dbus_interface

1007

731

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

1008

732

if_tag.appendChild(tag)

1009

# Add annotation tags

1010

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

1011

for tag in if_tag.getElementsByTagName(typ):

1012

annots = dict()

1013

for name, prop in (self.

1014

_get_all_dbus_things(typ)):

1015

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

1016

and prop._dbus_interface

1017

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

1018

annots.update(getattr(

1019

prop, "_dbus_annotations", {}))

1020

for name, value in annots.items():

1021

ann_tag = document.createElement(

1022

"annotation")

1023

ann_tag.setAttribute("name", name)

1024

ann_tag.setAttribute("value", value)

1025

tag.appendChild(ann_tag)

1026

# Add interface annotation tags

1027

for annotation, value in dict(

1028

itertools.chain.from_iterable(

1029

annotations().items()

1030

for name, annotations

1031

in self._get_all_dbus_things("interface")

1032

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

1033

)).items():

1034

ann_tag = document.createElement("annotation")

1035

ann_tag.setAttribute("name", annotation)

1036

ann_tag.setAttribute("value", value)

1037

if_tag.appendChild(ann_tag)

1038

733

# Add the names to the return values for the

1039

734

# "org.freedesktop.DBus.Properties" methods

1040

735

if (if_tag.getAttribute("name")

1055

750

except (AttributeError, xml.dom.DOMException,

1056

751

xml.parsers.expat.ExpatError) as error:

1057

752

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

1058

exc_info=error)

753

error)

1059

754

return xmlstring

1060

755

1061

756

1062

def datetime_to_dbus(dt, variant_level=0):

757

def datetime_to_dbus (dt, variant_level=0):

1063

758

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

1064

759

if dt is None:

1065

760

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

1066

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

1067

1068

1069

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1070

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

1071

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

1072

interface names according to the "alt_interface_names" mapping.

1073

Usage:

1074

1075

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

1076

"net.example.AlternateInterface"})

1077

class SampleDBusObject(dbus.service.Object):

1078

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

1079

def SampleDBusMethod():

1080

pass

1081

1082

The above "SampleDBusMethod" on "SampleDBusObject" will be

1083

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

1084

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

1085

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

1086

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

1087

1088

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

1089

(from DBusObjectWithProperties) and interfaces (from the

1090

dbus_interface_annotations decorator).

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.

1091

768

"""

1092

1093

def wrapper(cls):

1094

for orig_interface_name, alt_interface_name in (

1095

alt_interface_names.items()):

1096

attr = {}

1097

interface_names = set()

1098

# Go though all attributes of the class

1099

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

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):

1100

776

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

1101

777

# with the wrong interface name

1102

778

if (not hasattr(attribute, "_dbus_interface")

1103

or not attribute._dbus_interface.startswith(

1104

orig_interface_name)):

779

or not attribute._dbus_interface

780

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

1105

781

continue

1106

782

# Create an alternate D-Bus interface name based on

1107

783

# the current name

1108

alt_interface = attribute._dbus_interface.replace(

1109

orig_interface_name, alt_interface_name)

1110

interface_names.add(alt_interface)

784

alt_interface = (attribute._dbus_interface

785

.replace("se.recompile.Mandos",

786

"se.bsnet.fukt.Mandos"))

1111

787

# Is this a D-Bus signal?

1112

788

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

1113

if sys.version_info.major == 2:

1114

# Extract the original non-method undecorated

1115

# function by black magic

1116

nonmethod_func = (dict(

789

# Extract the original non-method function by

790

# black magic

791

nonmethod_func = (dict(

1117

792

zip(attribute.func_code.co_freevars,

1118

attribute.__closure__))

1119

["func"].cell_contents)

1120

else:

1121

nonmethod_func = attribute

793

attribute.__closure__))["func"]

794

.cell_contents)

1122

795

# Create a new, but exactly alike, function

1123

796

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

1124

797

# with the alternate D-Bus interface name

1125

if sys.version_info.major == 2:

1126

new_function = types.FunctionType(

1127

nonmethod_func.func_code,

1128

nonmethod_func.func_globals,

1129

nonmethod_func.func_name,

1130

nonmethod_func.func_defaults,

1131

nonmethod_func.func_closure)

1132

else:

1133

new_function = types.FunctionType(

1134

nonmethod_func.__code__,

1135

nonmethod_func.__globals__,

1136

nonmethod_func.__name__,

1137

nonmethod_func.__defaults__,

1138

nonmethod_func.__closure__)

1139

new_function = (dbus.service.signal(

1140

alt_interface,

1141

attribute._dbus_signature)(new_function))

1142

# Copy annotations, if any

1143

try:

1144

new_function._dbus_annotations = dict(

1145

attribute._dbus_annotations)

1146

except AttributeError:

1147

pass

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)))

1148

807

# Define a creator of a function to call both the

1149

# original and alternate functions, so both the

1150

# original and alternate signals gets sent when

1151

# the function is called

808

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

809

# signals gets sent when the function is called

1152

810

def fixscope(func1, func2):

1153

811

"""This function is a scope container to pass

1154

812

func1 and func2 to the "call_both" function

1155

813

outside of its arguments"""

1156

1157

814

def call_both(*args, **kwargs):

1158

815

"""This function will emit two D-Bus

1159

816

signals by calling func1 and func2"""

1160

817

func1(*args, **kwargs)

1161

818

func2(*args, **kwargs)

1162

1163

819

return call_both

1164

820

# Create the "call_both" function and add it to

1165

821

# the class

1166

attr[attrname] = fixscope(attribute, new_function)

822

attr[attrname] = fixscope(attribute,

823

new_function)

1167

824

# Is this a D-Bus method?

1168

825

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

1169

826

# Create a new, but exactly alike, function

1170

827

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

1171

828

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

1172

829

# to the class.

1173

attr[attrname] = (

1174

dbus.service.method(

1175

alt_interface,

1176

attribute._dbus_in_signature,

1177

attribute._dbus_out_signature)

1178

(types.FunctionType(attribute.func_code,

1179

attribute.func_globals,

1180

attribute.func_name,

1181

attribute.func_defaults,

1182

attribute.func_closure)))

1183

# Copy annotations, if any

1184

try:

1185

attr[attrname]._dbus_annotations = dict(

1186

attribute._dbus_annotations)

1187

except AttributeError:

1188

pass

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)))

1189

840

# Is this a D-Bus property?

1190

841

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

1191

842

# Create a new, but exactly alike, function

1192

843

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

1193

844

# property with the alternate D-Bus interface

1194

845

# name. Add it to the class.

1195

attr[attrname] = (dbus_service_property(

1196

alt_interface, attribute._dbus_signature,

1197

attribute._dbus_access,

1198

attribute._dbus_get_args_options

1199

["byte_arrays"])

1200

(types.FunctionType(

1201

attribute.func_code,

1202

attribute.func_globals,

1203

attribute.func_name,

1204

attribute.func_defaults,

1205

attribute.func_closure)))

1206

# Copy annotations, if any

1207

try:

1208

attr[attrname]._dbus_annotations = dict(

1209

attribute._dbus_annotations)

1210

except AttributeError:

1211

pass

1212

# Is this a D-Bus interface?

1213

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

1214

# Create a new, but exactly alike, function

1215

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

1216

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

1217

# to the class.

1218

attr[attrname] = (

1219

dbus_interface_annotations(alt_interface)

1220

(types.FunctionType(attribute.func_code,

1221

attribute.func_globals,

1222

attribute.func_name,

1223

attribute.func_defaults,

1224

attribute.func_closure)))

1225

if deprecate:

1226

# Deprecate all alternate interfaces

1227

iname="_AlternateDBusNames_interface_annotation{}"

1228

for interface_name in interface_names:

1229

1230

@dbus_interface_annotations(interface_name)

1231

def func(self):

1232

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

1233

"true" }

1234

# Find an unused name

1235

for aname in (iname.format(i)

1236

for i in itertools.count()):

1237

if aname not in attr:

1238

attr[aname] = func

1239

break

1240

if interface_names:

1241

# Replace the class with a new subclass of it with

1242

# methods, signals, etc. as created above.

1243

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

1244

(cls, ), attr)

1245

return cls

1246

1247

return wrapper

1248

1249

1250

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

1251

"se.bsnet.fukt.Mandos"})

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

1252

861

class ClientDBus(Client, DBusObjectWithProperties):

1253

862

"""A Client class using D-Bus

1254

863

1258

867

"""

1259

868

1260

869

runtime_expansions = (Client.runtime_expansions

1261

+ ("dbus_object_path", ))

1262

1263

_interface = "se.recompile.Mandos.Client"

870

+ ("dbus_object_path",))

1264

871

1265

872

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

1266

873

1267

874

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

875

self._approvals_pending = 0

1268

876

self.bus = bus

1269

877

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

1270

878

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

1271

879

# the D-Bus

1272

client_object_name = str(self.name).translate(

880

client_object_name = unicode(self.name).translate(

1273

881

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

1274

882

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

1275

self.dbus_object_path = dbus.ObjectPath(

1276

"/clients/" + client_object_name)

883

self.dbus_object_path = (dbus.ObjectPath

884

("/clients/" + client_object_name))

1277

885

DBusObjectWithProperties.__init__(self, self.bus,

1278

886

self.dbus_object_path)

1279

1280

def notifychangeproperty(transform_func, dbus_name,

1281

type_func=lambda x: x,

1282

variant_level=1,

1283

invalidate_only=False,

1284

_interface=_interface):

887

888

def notifychangeproperty(transform_func,

889

dbus_name, type_func=lambda x: x,

890

variant_level=1):

1285

891

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

1286

892

its changes to DBus.

1287

1288

transform_fun: Function that takes a value and a variant_level

1289

and transforms it to a D-Bus type.

893

894

transform_fun: Function that takes a value and transforms it

895

to a D-Bus type.

1290

896

dbus_name: D-Bus name of the variable

1291

897

type_func: Function that transform the value before sending it

1292

898

to the D-Bus. Default: no transform

1293

899

variant_level: D-Bus variant level. Default: 1

1294

900

"""

1295

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

1296

901

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

1297

902

def setter(self, value):

1298

903

if hasattr(self, "dbus_object_path"):

1299

904

if (not hasattr(self, attrname) or

1300

905

type_func(getattr(self, attrname, None))

1301

906

!= type_func(value)):

1302

if invalidate_only:

1303

self.PropertiesChanged(

1304

_interface, dbus.Dictionary(),

1305

dbus.Array((dbus_name, )))

1306

else:

1307

dbus_value = transform_func(

1308

type_func(value),

1309

variant_level = variant_level)

1310

self.PropertyChanged(dbus.String(dbus_name),

1311

dbus_value)

1312

self.PropertiesChanged(

1313

_interface,

1314

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

1315

dbus_value }),

1316

dbus.Array())

907

dbus_value = transform_func(type_func(value),

908

variant_level)

909

self.PropertyChanged(dbus.String(dbus_name),

910

dbus_value)

1317

911

setattr(self, attrname, value)

1318

912

1319

913

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

1320

914

915

1321

916

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1322

917

approvals_pending = notifychangeproperty(dbus.Boolean,

1323

918

"ApprovalPending",

1325

920

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

1326

921

last_enabled = notifychangeproperty(datetime_to_dbus,

1327

922

"LastEnabled")

1328

checker = notifychangeproperty(

1329

dbus.Boolean, "CheckerRunning",

1330

type_func = lambda checker: checker is not None)

923

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

924

type_func = lambda checker:

925

checker is not None)

1331

926

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1332

927

"LastCheckedOK")

1333

last_checker_status = notifychangeproperty(dbus.Int16,

1334

"LastCheckerStatus")

1335

928

last_approval_request = notifychangeproperty(

1336

929

datetime_to_dbus, "LastApprovalRequest")

1337

930

approved_by_default = notifychangeproperty(dbus.Boolean,

1338

931

"ApprovedByDefault")

1339

approval_delay = notifychangeproperty(

1340

dbus.UInt64, "ApprovalDelay",

1341

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

932

approval_delay = notifychangeproperty(dbus.UInt16,

933

"ApprovalDelay",

934

type_func =

935

_timedelta_to_milliseconds)

1342

936

approval_duration = notifychangeproperty(

1343

dbus.UInt64, "ApprovalDuration",

1344

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

937

dbus.UInt16, "ApprovalDuration",

938

type_func = _timedelta_to_milliseconds)

1345

939

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

1346

timeout = notifychangeproperty(

1347

dbus.UInt64, "Timeout",

1348

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

940

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

941

type_func =

942

_timedelta_to_milliseconds)

1349

943

extended_timeout = notifychangeproperty(

1350

dbus.UInt64, "ExtendedTimeout",

1351

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

1352

interval = notifychangeproperty(

1353

dbus.UInt64, "Interval",

1354

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

944

dbus.UInt16, "ExtendedTimeout",

945

type_func = _timedelta_to_milliseconds)

946

interval = notifychangeproperty(dbus.UInt16,

947

"Interval",

948

type_func =

949

_timedelta_to_milliseconds)

1355

950

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

1356

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

1357

invalidate_only=True)

1358

951

1359

952

del notifychangeproperty

1360

953

1367

960

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

1368

961

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

1369

962

1370

def checker_callback(self, source, condition,

1371

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

1372

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

1373

connection, command, *args,

1374

**kwargs)

1375

exitstatus = self.last_checker_status

1376

if exitstatus >= 0:

963

def checker_callback(self, pid, condition, command,

964

*args, **kwargs):

965

self.checker_callback_tag = None

966

self.checker = None

967

if os.WIFEXITED(condition):

968

exitstatus = os.WEXITSTATUS(condition)

1377

969

# Emit D-Bus signal

1378

970

self.CheckerCompleted(dbus.Int16(exitstatus),

1379

dbus.Int64(0),

971

dbus.Int64(condition),

1380

972

dbus.String(command))

1381

973

else:

1382

974

# Emit D-Bus signal

1383

975

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

1384

dbus.Int64(

1385

self.last_checker_signal),

976

dbus.Int64(condition),

1386

977

dbus.String(command))

1387

return ret

978

979

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

980

*args, **kwargs)

1388

981

1389

982

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

1390

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

983

old_checker = self.checker

984

if self.checker is not None:

985

old_checker_pid = self.checker.pid

986

else:

987

old_checker_pid = None

1391

988

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

1392

989

# Only if new checker process was started

1393

990

if (self.checker is not None

1397

994

return r

1398

995

1399

996

def _reset_approved(self):

1400

self.approved = None

997

self._approved = None

1401

998

return False

1402

999

1403

1000

def approve(self, value=True):

1404

self.approved = value

1405

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

1406

* 1000), self._reset_approved)

1407

1001

self.send_changedstate()

1002

self._approved = value

1003

gobject.timeout_add(_timedelta_to_milliseconds

1004

(self.approval_duration),

1005

self._reset_approved)

1006

1408

1007

1409

1008

## D-Bus methods, signals & properties

1410

1411

## Interfaces

1009

_interface = "se.recompile.Mandos.Client"

1412

1010

1413

1011

## Signals

1414

1012

1425

1023

pass

1426

1024

1427

1025

# PropertyChanged - signal

1428

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

1429

1026

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

1430

1027

def PropertyChanged(self, property, value):

1431

1028

"D-Bus signal"

1495

1092

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

1496

1093

1497

1094

# ApprovedByDefault - property

1498

@dbus_service_property(_interface,

1499

signature="b",

1095

@dbus_service_property(_interface, signature="b",

1500

1096

access="readwrite")

1501

1097

def ApprovedByDefault_dbus_property(self, value=None):

1502

1098

if value is None: # get

1504

1100

self.approved_by_default = bool(value)

1505

1101

1506

1102

# ApprovalDelay - property

1507

@dbus_service_property(_interface,

1508

signature="t",

1103

@dbus_service_property(_interface, signature="t",

1509

1104

access="readwrite")

1510

1105

def ApprovalDelay_dbus_property(self, value=None):

1511

1106

if value is None: # get

1512

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

1513

* 1000)

1107

return dbus.UInt64(self.approval_delay_milliseconds())

1514

1108

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

1515

1109

1516

1110

# ApprovalDuration - property

1517

@dbus_service_property(_interface,

1518

signature="t",

1111

@dbus_service_property(_interface, signature="t",

1519

1112

access="readwrite")

1520

1113

def ApprovalDuration_dbus_property(self, value=None):

1521

1114

if value is None: # get

1522

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

1523

* 1000)

1115

return dbus.UInt64(_timedelta_to_milliseconds(

1116

self.approval_duration))

1524

1117

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

1525

1118

1526

1119

# Name - property

1534

1127

return dbus.String(self.fingerprint)

1535

1128

1536

1129

# Host - property

1537

@dbus_service_property(_interface,

1538

signature="s",

1130

@dbus_service_property(_interface, signature="s",

1539

1131

access="readwrite")

1540

1132

def Host_dbus_property(self, value=None):

1541

1133

if value is None: # get

1542

1134

return dbus.String(self.host)

1543

self.host = str(value)

1135

self.host = value

1544

1136

1545

1137

# Created - property

1546

1138

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

1547

1139

def Created_dbus_property(self):

1548

return datetime_to_dbus(self.created)

1140

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

1549

1141

1550

1142

# LastEnabled - property

1551

1143

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

1553

1145

return datetime_to_dbus(self.last_enabled)

1554

1146

1555

1147

# Enabled - property

1556

@dbus_service_property(_interface,

1557

signature="b",

1148

@dbus_service_property(_interface, signature="b",

1558

1149

access="readwrite")

1559

1150

def Enabled_dbus_property(self, value=None):

1560

1151

if value is None: # get

1565

1156

self.disable()

1566

1157

1567

1158

# LastCheckedOK - property

1568

@dbus_service_property(_interface,

1569

signature="s",

1159

@dbus_service_property(_interface, signature="s",

1570

1160

access="readwrite")

1571

1161

def LastCheckedOK_dbus_property(self, value=None):

1572

1162

if value is not None:

1574

1164

return

1575

1165

return datetime_to_dbus(self.last_checked_ok)

1576

1166

1577

# LastCheckerStatus - property

1578

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

1579

def LastCheckerStatus_dbus_property(self):

1580

return dbus.Int16(self.last_checker_status)

1581

1582

1167

# Expires - property

1583

1168

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

1584

1169

def Expires_dbus_property(self):

1590

1175

return datetime_to_dbus(self.last_approval_request)

1591

1176

1592

1177

# Timeout - property

1593

@dbus_service_property(_interface,

1594

signature="t",

1178

@dbus_service_property(_interface, signature="t",

1595

1179

access="readwrite")

1596

1180

def Timeout_dbus_property(self, value=None):

1597

1181

if value is None: # get

1598

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

1599

old_timeout = self.timeout

1182

return dbus.UInt64(self.timeout_milliseconds())

1600

1183

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

1601

# Reschedule disabling

1602

if self.enabled:

1603

now = datetime.datetime.utcnow()

1604

self.expires += self.timeout - old_timeout

1605

if self.expires <= now:

1606

# The timeout has passed

1607

self.disable()

1608

else:

1609

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

1610

is None):

1611

return

1612

gobject.source_remove(self.disable_initiator_tag)

1613

self.disable_initiator_tag = gobject.timeout_add(

1614

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

1615

self.disable)

1184

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

1185

return

1186

# Reschedule timeout

1187

gobject.source_remove(self.disable_initiator_tag)

1188

self.disable_initiator_tag = None

1189

self.expires = None

1190

time_to_die = (self.

1191

_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))

1616

1205

1617

1206

# ExtendedTimeout - property

1618

@dbus_service_property(_interface,

1619

signature="t",

1207

@dbus_service_property(_interface, signature="t",

1620

1208

access="readwrite")

1621

1209

def ExtendedTimeout_dbus_property(self, value=None):

1622

1210

if value is None: # get

1623

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

1624

* 1000)

1211

return dbus.UInt64(self.extended_timeout_milliseconds())

1625

1212

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

1626

1213

1627

1214

# Interval - property

1628

@dbus_service_property(_interface,

1629

signature="t",

1215

@dbus_service_property(_interface, signature="t",

1630

1216

access="readwrite")

1631

1217

def Interval_dbus_property(self, value=None):

1632

1218

if value is None: # get

1633

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

1219

return dbus.UInt64(self.interval_milliseconds())

1634

1220

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

1635

1221

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

1636

1222

return

1637

if self.enabled:

1638

# Reschedule checker run

1639

gobject.source_remove(self.checker_initiator_tag)

1640

self.checker_initiator_tag = gobject.timeout_add(

1641

value, self.start_checker)

1642

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

1643

1228

1644

1229

# Checker - property

1645

@dbus_service_property(_interface,

1646

signature="s",

1230

@dbus_service_property(_interface, signature="s",

1647

1231

access="readwrite")

1648

1232

def Checker_dbus_property(self, value=None):

1649

1233

if value is None: # get

1650

1234

return dbus.String(self.checker_command)

1651

self.checker_command = str(value)

1235

self.checker_command = value

1652

1236

1653

1237

# CheckerRunning - property

1654

@dbus_service_property(_interface,

1655

signature="b",

1238

@dbus_service_property(_interface, signature="b",

1656

1239

access="readwrite")

1657

1240

def CheckerRunning_dbus_property(self, value=None):

1658

1241

if value is None: # get

1668

1251

return self.dbus_object_path # is already a dbus.ObjectPath

1669

1252

1670

1253

# Secret = property

1671

@dbus_service_property(_interface,

1672

signature="ay",

1673

access="write",

1674

byte_arrays=True)

1254

@dbus_service_property(_interface, signature="ay",

1255

access="write", byte_arrays=True)

1675

1256

def Secret_dbus_property(self, value):

1676

self.secret = bytes(value)

1257

self.secret = str(value)

1677

1258

1678

1259

del _interface

1679

1260

1683

1264

self._pipe = child_pipe

1684

1265

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

1685

1266

if not self._pipe.recv():

1686

raise KeyError(fpr)

1267

raise KeyError()

1687

1268

1688

1269

def __getattribute__(self, name):

1689

if name == '_pipe':

1270

if(name == '_pipe'):

1690

1271

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

1691

1272

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

1692

1273

data = self._pipe.recv()

1693

1274

if data[0] == 'data':

1694

1275

return data[1]

1695

1276

if data[0] == 'function':

1696

1697

1277

def func(*args, **kwargs):

1698

1278

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

1699

1279

return self._pipe.recv()[1]

1700

1701

1280

return func

1702

1281

1703

1282

def __setattr__(self, name, value):

1704

if name == '_pipe':

1283

if(name == '_pipe'):

1705

1284

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

1706

1285

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

1707

1286

1287

class ClientDBusTransitional(ClientDBus):

1288

__metaclass__ = AlternateDBusNamesMetaclass

1708

1289

1709

1290

class ClientHandler(socketserver.BaseRequestHandler, object):

1710

1291

"""A class to handle client connections.

1715

1296

def handle(self):

1716

1297

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

1717

1298

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

1718

str(self.client_address))

1299

unicode(self.client_address))

1719

1300

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

1720

1301

self.server.child_pipe.fileno())

1721

1302

1722

session = gnutls.connection.ClientSession(

1723

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

1303

session = (gnutls.connection

1304

.ClientSession(self.request,

1305

gnutls.connection

1306

.X509Credentials()))

1724

1307

1725

1308

# Note: gnutls.connection.X509Credentials is really a

1726

1309

# generic GnuTLS certificate credentials object so long as

1735

1318

priority = self.server.gnutls_priority

1736

1319

if priority is None:

1737

1320

priority = "NORMAL"

1738

gnutls.library.functions.gnutls_priority_set_direct(

1739

session._c_object, priority, None)

1321

(gnutls.library.functions

1322

.gnutls_priority_set_direct(session._c_object,

1323

priority, None))

1740

1324

1741

1325

# Start communication using the Mandos protocol

1742

1326

# Get protocol number

1744

1328

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

1745

1329

try:

1746

1330

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

1747

raise RuntimeError(line)

1331

raise RuntimeError

1748

1332

except (ValueError, IndexError, RuntimeError) as error:

1749

1333

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

1750

1334

return

1762

1346

approval_required = False

1763

1347

try:

1764

1348

try:

1765

fpr = self.fingerprint(

1766

self.peer_certificate(session))

1349

fpr = self.fingerprint(self.peer_certificate

1350

(session))

1767

1351

except (TypeError,

1768

1352

gnutls.errors.GNUTLSError) as error:

1769

1353

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

1784

1368

while True:

1785

1369

if not client.enabled:

1786

1370

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

1787

client.name)

1371

client.name)

1788

1372

if self.server.use_dbus:

1789

1373

# Emit D-Bus signal

1790

1374

client.Rejected("Disabled")

1791

1375

return

1792

1376

1793

if client.approved or not client.approval_delay:

1377

if client._approved or not client.approval_delay:

1794

1378

#We are approved or approval is disabled

1795

1379

break

1796

elif client.approved is None:

1380

elif client._approved is None:

1797

1381

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

1798

1382

client.name)

1799

1383

if self.server.use_dbus:

1800

1384

# Emit D-Bus signal

1801

1385

client.NeedApproval(

1802

client.approval_delay.total_seconds()

1803

* 1000, client.approved_by_default)

1386

client.approval_delay_milliseconds(),

1387

client.approved_by_default)

1804

1388

else:

1805

1389

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

1806

1390

client.name)

1812

1396

#wait until timeout or approved

1813

1397

time = datetime.datetime.now()

1814

1398

client.changedstate.acquire()

1815

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

1399

(client.changedstate.wait

1400

(float(client._timedelta_to_milliseconds(delay)

1401

/ 1000)))

1816

1402

client.changedstate.release()

1817

1403

time2 = datetime.datetime.now()

1818

1404

if (time2 - time) >= delay:

1834

1420

try:

1835

1421

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

1836

1422

except gnutls.errors.GNUTLSError as error:

1837

logger.warning("gnutls send failed",

1838

exc_info=error)

1423

logger.warning("gnutls send failed")

1839

1424

return

1840

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

1841

len(client.secret) - (sent_size

1842

+ sent))

1425

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

1426

sent, len(client.secret)

1427

- (sent_size + sent))

1843

1428

sent_size += sent

1844

1429

1845

1430

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

1846

1431

# bump the timeout using extended_timeout

1847

client.bump_timeout(client.extended_timeout)

1432

client.checked_ok(client.extended_timeout)

1848

1433

if self.server.use_dbus:

1849

1434

# Emit D-Bus signal

1850

1435

client.GotSecret()

1855

1440

try:

1856

1441

session.bye()

1857

1442

except gnutls.errors.GNUTLSError as error:

1858

logger.warning("GnuTLS bye failed",

1859

exc_info=error)

1443

logger.warning("GnuTLS bye failed")

1860

1444

1861

1445

@staticmethod

1862

1446

def peer_certificate(session):

1863

1447

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

1864

1448

# If not an OpenPGP certificate...

1865

if (gnutls.library.functions.gnutls_certificate_type_get(

1866

session._c_object)

1449

if (gnutls.library.functions

1450

.gnutls_certificate_type_get(session._c_object)

1867

1451

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1868

1452

# ...do the normal thing

1869

1453

return session.peer_certificate

1883

1467

def fingerprint(openpgp):

1884

1468

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1885

1469

# New GnuTLS "datum" with the OpenPGP public key

1886

datum = gnutls.library.types.gnutls_datum_t(

1887

ctypes.cast(ctypes.c_char_p(openpgp),

1888

ctypes.POINTER(ctypes.c_ubyte)),

1889

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))))

1890

1475

# New empty GnuTLS certificate

1891

1476

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1892

gnutls.library.functions.gnutls_openpgp_crt_init(

1893

ctypes.byref(crt))

1477

(gnutls.library.functions

1478

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

1894

1479

# Import the OpenPGP public key into the certificate

1895

gnutls.library.functions.gnutls_openpgp_crt_import(

1896

crt, ctypes.byref(datum),

1897

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))

1898

1484

# Verify the self signature in the key

1899

1485

crtverify = ctypes.c_uint()

1900

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1901

crt, 0, ctypes.byref(crtverify))

1486

(gnutls.library.functions

1487

.gnutls_openpgp_crt_verify_self(crt, 0,

1488

ctypes.byref(crtverify)))

1902

1489

if crtverify.value != 0:

1903

1490

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1904

raise gnutls.errors.CertificateSecurityError(

1905

"Verify failed")

1491

raise (gnutls.errors.CertificateSecurityError

1492

("Verify failed"))

1906

1493

# New buffer for the fingerprint

1907

1494

buf = ctypes.create_string_buffer(20)

1908

1495

buf_len = ctypes.c_size_t()

1909

1496

# Get the fingerprint from the certificate into the buffer

1910

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1911

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)))

1912

1500

# Deinit the certificate

1913

1501

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1914

1502

# Convert the buffer to a Python bytestring

1915

1503

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

1916

1504

# Convert the bytestring to hexadecimal notation

1917

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

1505

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

1918

1506

return hex_fpr

1919

1507

1920

1508

1921

1509

class MultiprocessingMixIn(object):

1922

1510

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

1923

1924

1511

def sub_process_main(self, request, address):

1925

1512

try:

1926

1513

self.finish_request(request, address)

1927

except Exception:

1514

except:

1928

1515

self.handle_error(request, address)

1929

1516

self.close_request(request)

1930

1517

1931

1518

def process_request(self, request, address):

1932

1519

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

1933

1520

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

1934

args = (request, address))

1521

args = (request,

1522

address))

1935

1523

proc.start()

1936

1524

return proc

1937

1525

1938

1526

1939

1527

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1940

1528

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

1941

1942

1529

def process_request(self, request, client_address):

1943

1530

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

1944

1531

1953

1540

1954

1541

def add_pipe(self, parent_pipe, proc):

1955

1542

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

1956

raise NotImplementedError()

1543

raise NotImplementedError

1957

1544

1958

1545

1959

1546

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1965

1552

interface: None or a network interface name (string)

1966

1553

use_ipv6: Boolean; to use IPv6 or not

1967

1554

"""

1968

1969

1555

def __init__(self, server_address, RequestHandlerClass,

1970

interface=None,

1971

use_ipv6=True,

1972

socketfd=None):

1973

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

1974

creating a new one with socket.socket().

1975

"""

1556

interface=None, use_ipv6=True):

1976

1557

self.interface = interface

1977

1558

if use_ipv6:

1978

1559

self.address_family = socket.AF_INET6

1979

if socketfd is not None:

1980

# Save the file descriptor

1981

self.socketfd = socketfd

1982

# Save the original socket.socket() function

1983

self.socket_socket = socket.socket

1984

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

1985

#

1986

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

1987

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

1988

# patching socket.socket.)

1989

#

1990

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

1991

@functools.wraps(socket.socket)

1992

def socket_wrapper(*args, **kwargs):

1993

# Restore original function so subsequent calls are

1994

# not affected.

1995

socket.socket = self.socket_socket

1996

del self.socket_socket

1997

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

1998

# saved file descriptor.

1999

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

2000

# Replace socket.socket() function with wrapper

2001

socket.socket = socket_wrapper

2002

# The socketserver.TCPServer.__init__ will call

2003

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

2004

# socket_wrapper(), if socketfd was set.

2005

1560

socketserver.TCPServer.__init__(self, server_address,

2006

1561

RequestHandlerClass)

2007

2008

1562

def server_bind(self):

2009

1563

"""This overrides the normal server_bind() function

2010

1564

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

2016

1570

self.interface)

2017

1571

else:

2018

1572

try:

2019

self.socket.setsockopt(

2020

socket.SOL_SOCKET, SO_BINDTODEVICE,

2021

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

1573

self.socket.setsockopt(socket.SOL_SOCKET,

1574

SO_BINDTODEVICE,

1575

str(self.interface

1576

+ '\0'))

2022

1577

except socket.error as error:

2023

if error.errno == errno.EPERM:

2024

logger.error("No permission to bind to"

2025

" interface %s", self.interface)

2026

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:

2027

1583

logger.error("SO_BINDTODEVICE not available;"

2028

1584

" cannot bind to interface %s",

2029

1585

self.interface)

2030

elif error.errno == errno.ENODEV:

2031

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

2032

" cannot bind", self.interface)

2033

1586

else:

2034

1587

raise

2035

1588

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

2038

1591

if self.address_family == socket.AF_INET6:

2039

1592

any_address = "::" # in6addr_any

2040

1593

else:

2041

any_address = "0.0.0.0" # INADDR_ANY

1594

any_address = socket.INADDR_ANY

2042

1595

self.server_address = (any_address,

2043

1596

self.server_address[1])

2044

1597

elif not self.server_address[1]:

2045

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

1598

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

1599

0)

2046

1600

# if self.interface:

2047

1601

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

2048

1602

# 0, # port

2062

1616

2063

1617

Assumes a gobject.MainLoop event loop.

2064

1618

"""

2065

2066

1619

def __init__(self, server_address, RequestHandlerClass,

2067

interface=None,

2068

use_ipv6=True,

2069

clients=None,

2070

gnutls_priority=None,

2071

use_dbus=True,

2072

socketfd=None):

1620

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

1621

gnutls_priority=None, use_dbus=True):

2073

1622

self.enabled = False

2074

1623

self.clients = clients

2075

1624

if self.clients is None:

2076

self.clients = {}

1625

self.clients = set()

2077

1626

self.use_dbus = use_dbus

2078

1627

self.gnutls_priority = gnutls_priority

2079

1628

IPv6_TCPServer.__init__(self, server_address,

2080

1629

RequestHandlerClass,

2081

1630

interface = interface,

2082

use_ipv6 = use_ipv6,

2083

socketfd = socketfd)

2084

1631

use_ipv6 = use_ipv6)

2085

1632

def server_activate(self):

2086

1633

if self.enabled:

2087

1634

return socketserver.TCPServer.server_activate(self)

2091

1638

2092

1639

def add_pipe(self, parent_pipe, proc):

2093

1640

# Call "handle_ipc" for both data and EOF events

2094

gobject.io_add_watch(

2095

parent_pipe.fileno(),

2096

gobject.IO_IN | gobject.IO_HUP,

2097

functools.partial(self.handle_ipc,

2098

parent_pipe = parent_pipe,

2099

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))

2100

1647

2101

def handle_ipc(self, source, condition,

2102

parent_pipe=None,

2103

proc = None,

2104

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)

2105

1664

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

2106

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

1665

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

2107

1666

# Wait for other process to exit

2108

1667

proc.join()

2109

1668

return False

2116

1675

fpr = request[1]

2117

1676

address = request[2]

2118

1677

2119

for c in self.clients.itervalues():

1678

for c in self.clients:

2120

1679

if c.fingerprint == fpr:

2121

1680

client = c

2122

1681

break

2130

1689

parent_pipe.send(False)

2131

1690

return False

2132

1691

2133

gobject.io_add_watch(

2134

parent_pipe.fileno(),

2135

gobject.IO_IN | gobject.IO_HUP,

2136

functools.partial(self.handle_ipc,

2137

parent_pipe = parent_pipe,

2138

proc = proc,

2139

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))

2140

1700

parent_pipe.send(True)

2141

1701

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

2142

1702

# same fileno

2148

1708

2149

1709

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

2150

1710

funcname)(*args,

2151

**kwargs)))

1711

**kwargs)))

2152

1712

2153

1713

if command == 'getattr':

2154

1714

attrname = request[1]

2155

if isinstance(client_object.__getattribute__(attrname),

2156

collections.Callable):

2157

parent_pipe.send(('function', ))

1715

if callable(client_object.__getattribute__(attrname)):

1716

parent_pipe.send(('function',))

2158

1717

else:

2159

parent_pipe.send((

2160

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

1718

parent_pipe.send(('data', client_object

1719

.__getattribute__(attrname)))

2161

1720

2162

1721

if command == 'setattr':

2163

1722

attrname = request[1]

2167

1726

return True

2168

1727

2169

1728

2170

def rfc3339_duration_to_delta(duration):

2171

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

2172

2173

>>> rfc3339_duration_to_delta("P7D")

2174

datetime.timedelta(7)

2175

>>> rfc3339_duration_to_delta("PT60S")

2176

datetime.timedelta(0, 60)

2177

>>> rfc3339_duration_to_delta("PT60M")

2178

datetime.timedelta(0, 3600)

2179

>>> rfc3339_duration_to_delta("PT24H")

2180

datetime.timedelta(1)

2181

>>> rfc3339_duration_to_delta("P1W")

2182

datetime.timedelta(7)

2183

>>> rfc3339_duration_to_delta("PT5M30S")

2184

datetime.timedelta(0, 330)

2185

>>> rfc3339_duration_to_delta("P1DT3M20S")

2186

datetime.timedelta(1, 200)

2187

"""

2188

2189

# Parsing an RFC 3339 duration with regular expressions is not

2190

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

2191

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

2192

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

2193

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

2194

# avoid excessive use of external libraries.

2195

2196

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

2197

Token = collections.namedtuple("Token", (

2198

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

2199

# a "group" containing digits

2200

"value", # datetime.timedelta or None

2201

"followers")) # Tokens valid after this token

2202

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

2203

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

2204

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

2205

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

2206

datetime.timedelta(seconds=1),

2207

frozenset((token_end, )))

2208

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

2209

datetime.timedelta(minutes=1),

2210

frozenset((token_second, token_end)))

2211

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

2212

datetime.timedelta(hours=1),

2213

frozenset((token_minute, token_end)))

2214

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

2215

None,

2216

frozenset((token_hour, token_minute,

2217

token_second)))

2218

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

2219

datetime.timedelta(days=1),

2220

frozenset((token_time, token_end)))

2221

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

2222

datetime.timedelta(weeks=4),

2223

frozenset((token_day, token_end)))

2224

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

2225

datetime.timedelta(weeks=52),

2226

frozenset((token_month, token_end)))

2227

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

2228

datetime.timedelta(weeks=1),

2229

frozenset((token_end, )))

2230

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

2231

frozenset((token_year, token_month,

2232

token_day, token_time,

2233

token_week)))

2234

# Define starting values

2235

value = datetime.timedelta() # Value so far

2236

found_token = None

2237

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

2238

s = duration # String left to parse

2239

# Loop until end token is found

2240

while found_token is not token_end:

2241

# Search for any currently valid tokens

2242

for token in followers:

2243

match = token.regexp.match(s)

2244

if match is not None:

2245

# Token found

2246

if token.value is not None:

2247

# Value found, parse digits

2248

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

2249

# Add to value so far

2250

value += factor * token.value

2251

# Strip token from string

2252

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

2253

# Go to found token

2254

found_token = token

2255

# Set valid next tokens

2256

followers = found_token.followers

2257

break

2258

else:

2259

# No currently valid tokens were found

2260

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

2261

.format(duration))

2262

# End token found

2263

return value

2264

2265

2266

1729

def string_to_delta(interval):

2267

1730

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

2268

1731

2279

1742

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

2280

1743

datetime.timedelta(0, 330)

2281

1744

"""

2282

2283

try:

2284

return rfc3339_duration_to_delta(interval)

2285

except ValueError:

2286

pass

2287

2288

1745

timevalue = datetime.timedelta(0)

2289

1746

for s in interval.split():

2290

1747

try:

2291

suffix = s[-1]

1748

suffix = unicode(s[-1])

2292

1749

value = int(s[:-1])

2293

1750

if suffix == "d":

2294

1751

delta = datetime.timedelta(value)

2301

1758

elif suffix == "w":

2302

1759

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

2303

1760

else:

2304

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

2305

except IndexError as e:

1761

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

1762

except (ValueError, IndexError) as e:

2306

1763

raise ValueError(*(e.args))

2307

1764

timevalue += delta

2308

1765

return timevalue

2309

1766

2310

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

2311

1792

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

2312

1793

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

2313

1794

2321

1802

sys.exit()

2322

1803

if not noclose:

2323

1804

# Close all standard open file descriptors

2324

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

1805

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

2325

1806

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

2326

1807

raise OSError(errno.ENODEV,

2327

"{} not a character device"

2328

.format(os.devnull))

1808

"%s not a character device"

1809

% os.path.devnull)

2329

1810

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

2330

1811

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

2331

1812

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

2340

1821

2341

1822

parser = argparse.ArgumentParser()

2342

1823

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

2343

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

1824

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

2344

1825

help="show version number and exit")

2345

1826

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

2346

1827

help="Bind to interface IF")

2352

1833

help="Run self-test")

2353

1834

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

2354

1835

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

2355

" to terminal", default=None)

1836

" to terminal")

2356

1837

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

2357

1838

help="Debug level for stdout output")

2358

1839

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

2365

1846

" files")

2366

1847

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

2367

1848

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

2368

" system bus interface", default=None)

1849

" system bus interface")

2369

1850

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

2370

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

2371

default=None)

2372

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

2373

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

2374

" state", default=None)

2375

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

2376

help="Specify a file descriptor to a network"

2377

" socket to use instead of creating one")

2378

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

2379

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

2380

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

2381

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

2382

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

2383

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

2384

default=None)

2385

1851

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

2386

1852

options = parser.parse_args()

2387

1853

2388

1854

if options.check:

2389

1855

import doctest

2390

fail_count, test_count = doctest.testmod()

2391

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

1856

doctest.testmod()

1857

sys.exit()

2392

1858

2393

1859

# Default values for config file for server-global settings

2394

1860

server_defaults = { "interface": "",

2396

1862

"port": "",

2397

1863

"debug": "False",

2398

1864

"priority":

2399

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

2400

":+SIGN-DSA-SHA256",

1865

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

2401

1866

"servicename": "Mandos",

2402

1867

"use_dbus": "True",

2403

1868

"use_ipv6": "True",

2404

1869

"debuglevel": "",

2405

"restore": "True",

2406

"socket": "",

2407

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

2408

"foreground": "False",

2409

"zeroconf": "True",

2410

}

1870

}

2411

1871

2412

1872

# Parse config file for server-global settings

2413

1873

server_config = configparser.SafeConfigParser(server_defaults)

2414

1874

del server_defaults

2415

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

1875

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

1876

"mandos.conf"))

2416

1877

# Convert the SafeConfigParser object to a dict

2417

1878

server_settings = server_config.defaults()

2418

1879

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

2419

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

1880

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

2420

1881

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

2421

1882

option)

2422

1883

if server_settings["port"]:

2423

1884

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

2424

1885

"port")

2425

if server_settings["socket"]:

2426

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

2427

"socket")

2428

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

2429

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

2430

# happen with a supplied network socket.

2431

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

2432

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

2433

["socket"])

2434

1886

del server_config

2435

1887

2436

1888

# Override the settings from the config file with command line

2437

1889

# options, if set.

2438

1890

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

2439

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

2440

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

2441

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

1891

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

1892

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

2442

1893

value = getattr(options, option)

2443

1894

if value is not None:

2444

1895

server_settings[option] = value

2445

1896

del options

2446

1897

# Force all strings to be unicode

2447

1898

for option in server_settings.keys():

2448

if isinstance(server_settings[option], bytes):

2449

server_settings[option] = (server_settings[option]

2450

.decode("utf-8"))

2451

# Force all boolean options to be boolean

2452

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

2453

"foreground", "zeroconf"):

2454

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

2455

# Debug implies foreground

2456

if server_settings["debug"]:

2457

server_settings["foreground"] = True

1899

if type(server_settings[option]) is str:

1900

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

2458

1901

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

2459

1902

2460

1903

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

2461

1904

2462

if (not server_settings["zeroconf"]

2463

and not (server_settings["port"]

2464

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

2465

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

2466

2467

1905

# For convenience

2468

1906

debug = server_settings["debug"]

2469

1907

debuglevel = server_settings["debuglevel"]

2470

1908

use_dbus = server_settings["use_dbus"]

2471

1909

use_ipv6 = server_settings["use_ipv6"]

2472

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

2473

stored_state_file)

2474

foreground = server_settings["foreground"]

2475

zeroconf = server_settings["zeroconf"]

2476

2477

if debug:

2478

initlogger(debug, logging.DEBUG)

2479

else:

2480

if not debuglevel:

2481

initlogger(debug)

2482

else:

2483

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

2484

initlogger(debug, level)

2485

1910

2486

1911

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

2487

syslogger.setFormatter(

2488

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

2489

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

2490

server_settings["servicename"])))

1912

syslogger.setFormatter(logging.Formatter

1913

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

1914

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

1915

% server_settings["servicename"]))

2491

1916

2492

1917

# Parse config file with clients

2493

client_config = configparser.SafeConfigParser(Client

2494

.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)

2495

1927

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

2496

1928

"clients.conf"))

2497

1929

2498

1930

global mandos_dbus_service

2499

1931

mandos_dbus_service = None

2500

1932

2501

socketfd = None

2502

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

2503

socketfd = server_settings["socket"]

2504

tcp_server = MandosServer(

2505

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

2506

ClientHandler,

2507

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

2508

use_ipv6=use_ipv6,

2509

gnutls_priority=server_settings["priority"],

2510

use_dbus=use_dbus,

2511

socketfd=socketfd)

2512

if not foreground:

2513

pidfilename = "/run/mandos.pid"

2514

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

2515

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

2516

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"

2517

1944

try:

2518

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

2519

except IOError as e:

2520

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

2521

exc_info=e)

1945

pidfile = open(pidfilename, "w")

1946

except IOError:

1947

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

2522

1948

2523

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:

2524

1953

try:

2525

uid = pwd.getpwnam(name).pw_uid

2526

gid = pwd.getpwnam(name).pw_gid

2527

break

1954

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

1955

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

2528

1956

except KeyError:

2529

continue

2530

else:

2531

uid = 65534

2532

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

2533

1963

try:

2534

1964

os.setgid(gid)

2535

1965

os.setuid(uid)

2536

1966

except OSError as error:

2537

if error.errno != errno.EPERM:

2538

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)

2539

1977

2540

1978

if debug:

2541

1979

# Enable all possible GnuTLS debugging

2548

1986

def debug_gnutls(level, string):

2549

1987

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

2550

1988

2551

gnutls.library.functions.gnutls_global_set_log_function(

2552

debug_gnutls)

1989

(gnutls.library.functions

1990

.gnutls_global_set_log_function(debug_gnutls))

2553

1991

2554

1992

# Redirect stdin so all checkers get /dev/null

2555

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

1993

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

2556

1994

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

2557

1995

if null > 2:

2558

1996

os.close(null)

1997

else:

1998

# No console logging

1999

logger.removeHandler(console)

2559

2000

2560

2001

# Need to fork before connecting to D-Bus

2561

if not foreground:

2002

if not debug:

2562

2003

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

2563

2004

daemon()

2564

2005

2565

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

2566

# need to inform gobject that threads will be used.

2567

gobject.threads_init()

2568

2569

2006

global main_loop

2570

2007

# From the Avahi example code

2571

DBusGMainLoop(set_as_default=True)

2008

DBusGMainLoop(set_as_default=True )

2572

2009

main_loop = gobject.MainLoop()

2573

2010

bus = dbus.SystemBus()

2574

2011

# End of Avahi example code

2575

2012

if use_dbus:

2576

2013

try:

2577

2014

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

2578

bus,

2579

do_not_queue=True)

2580

old_bus_name = dbus.service.BusName(

2581

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

2582

do_not_queue=True)

2583

except dbus.exceptions.DBusException as e:

2584

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")

2585

2021

use_dbus = False

2586

2022

server_settings["use_dbus"] = False

2587

2023

tcp_server.use_dbus = False

2588

if zeroconf:

2589

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2590

service = AvahiServiceToSyslog(

2591

name = server_settings["servicename"],

2592

servicetype = "_mandos._tcp",

2593

protocol = protocol,

2594

bus = bus)

2595

if server_settings["interface"]:

2596

service.interface = if_nametoindex(

2597

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"])))

2598

2031

2599

2032

global multiprocessing_manager

2600

2033

multiprocessing_manager = multiprocessing.Manager()

2601

2034

2602

2035

client_class = Client

2603

2036

if use_dbus:

2604

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

2605

2606

client_settings = Client.config_parser(client_config)

2607

old_client_settings = {}

2608

clients_data = {}

2609

2610

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

2611

global wnull

2612

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

2613

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

2614

# mode

2615

if debug or not foreground:

2616

wnull.close()

2617

2618

# Get client data and settings from last running state.

2619

if server_settings["restore"]:

2620

try:

2621

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

2622

clients_data, old_client_settings = pickle.load(

2623

stored_state)

2624

os.remove(stored_state_path)

2625

except IOError as e:

2626

if e.errno == errno.ENOENT:

2627

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

2628

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

2629

else:

2630

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

2631

exc_info=e)

2632

raise

2633

except EOFError as e:

2634

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

2635

"EOFError:",

2636

exc_info=e)

2637

2638

with PGPEngine() as pgp:

2639

for client_name, client in clients_data.items():

2640

# Skip removed clients

2641

if client_name not in client_settings:

2642

continue

2643

2644

# Decide which value to use after restoring saved state.

2645

# We have three different values: Old config file,

2646

# new config file, and saved state.

2647

# New config value takes precedence if it differs from old

2648

# config value, otherwise use saved state.

2649

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

2650

try:

2651

# For each value in new config, check if it

2652

# differs from the old config value (Except for

2653

# the "secret" attribute)

2654

if (name != "secret"

2655

and (value !=

2656

old_client_settings[client_name][name])):

2657

client[name] = value

2658

except KeyError:

2659

pass

2660

2661

# Clients who has passed its expire date can still be

2662

# enabled if its last checker was successful. A Client

2663

# whose checker succeeded before we stored its state is

2664

# assumed to have successfully run all checkers during

2665

# downtime.

2666

if client["enabled"]:

2667

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

2668

if not client["last_checked_ok"]:

2669

logger.warning(

2670

"disabling client {} - Client never "

2671

"performed a successful checker".format(

2672

client_name))

2673

client["enabled"] = False

2674

elif client["last_checker_status"] != 0:

2675

logger.warning(

2676

"disabling client {} - Client last"

2677

" checker failed with error code"

2678

" {}".format(

2679

client_name,

2680

client["last_checker_status"]))

2681

client["enabled"] = False

2682

else:

2683

client["expires"] = (

2684

datetime.datetime.utcnow()

2685

+ client["timeout"])

2686

logger.debug("Last checker succeeded,"

2687

" keeping {} enabled".format(

2688

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):

2689

2046

try:

2690

client["secret"] = pgp.decrypt(

2691

client["encrypted_secret"],

2692

client_settings[client_name]["secret"])

2693

except PGPError:

2694

# If decryption fails, we use secret from new settings

2695

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

2696

client_name))

2697

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

2698

["secret"])

2699

2700

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

2701

for client_name in (set(old_client_settings)

2702

- set(client_settings)):

2703

del clients_data[client_name]

2704

for client_name in (set(client_settings)

2705

- set(old_client_settings)):

2706

clients_data[client_name] = client_settings[client_name]

2707

2708

# Create all client objects

2709

for client_name, client in clients_data.items():

2710

tcp_server.clients[client_name] = client_class(

2711

name = client_name,

2712

settings = client,

2713

server_settings = server_settings)

2714

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()))

2715

2056

if not tcp_server.clients:

2716

2057

logger.warning("No clients defined")

2717

2718

if not foreground:

2719

if pidfile is not None:

2720

pid = os.getpid()

2721

try:

2722

with pidfile:

2723

print(pid, file=pidfile)

2724

except IOError:

2725

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

2726

pidfilename, pid)

2727

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

2728

2071

del pidfilename

2072

2073

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

2729

2074

2730

2075

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

2731

2076

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

2732

2077

2733

2078

if use_dbus:

2734

2735

@alternate_dbus_interfaces(

2736

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

2737

class MandosDBusService(DBusObjectWithProperties):

2079

class MandosDBusService(dbus.service.Object):

2738

2080

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

2739

2740

2081

def __init__(self):

2741

2082

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

2742

2743

2083

_interface = "se.recompile.Mandos"

2744

2084

2745

@dbus_interface_annotations(_interface)

2746

def _foo(self):

2747

return {

2748

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

2749

"false" }

2750

2751

2085

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

2752

2086

def ClientAdded(self, objpath):

2753

2087

"D-Bus signal"

2766

2100

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

2767

2101

def GetAllClients(self):

2768

2102

"D-Bus method"

2769

return dbus.Array(c.dbus_object_path for c in

2770

tcp_server.clients.itervalues())

2103

return dbus.Array(c.dbus_object_path

2104

for c in tcp_server.clients)

2771

2105

2772

2106

@dbus.service.method(_interface,

2773

2107

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

2774

2108

def GetAllClientsWithProperties(self):

2775

2109

"D-Bus method"

2776

2110

return dbus.Dictionary(

2777

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

2778

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

2111

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

2112

for c in tcp_server.clients),

2779

2113

signature="oa{sv}")

2780

2114

2781

2115

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

2782

2116

def RemoveClient(self, object_path):

2783

2117

"D-Bus method"

2784

for c in tcp_server.clients.itervalues():

2118

for c in tcp_server.clients:

2785

2119

if c.dbus_object_path == object_path:

2786

del tcp_server.clients[c.name]

2120

tcp_server.clients.remove(c)

2787

2121

c.remove_from_connection()

2788

2122

# Don't signal anything except ClientRemoved

2789

2123

c.disable(quiet=True)

2794

2128

2795

2129

del _interface

2796

2130

2797

mandos_dbus_service = MandosDBusService()

2131

class MandosDBusServiceTransitional(MandosDBusService):

2132

__metaclass__ = AlternateDBusNamesMetaclass

2133

mandos_dbus_service = MandosDBusServiceTransitional()

2798

2134

2799

2135

def cleanup():

2800

2136

"Cleanup function; run on exit"

2801

if zeroconf:

2802

service.cleanup()

2137

service.cleanup()

2803

2138

2804

2139

multiprocessing.active_children()

2805

wnull.close()

2806

if not (tcp_server.clients or client_settings):

2807

return

2808

2809

# Store client before exiting. Secrets are encrypted with key

2810

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

2811

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

2812

clients = {}

2813

with PGPEngine() as pgp:

2814

for client in tcp_server.clients.itervalues():

2815

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

2816

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

2817

key)

2818

client_dict = {}

2819

2820

# A list of attributes that can not be pickled

2821

# + secret.

2822

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

2823

"checker", "server_settings" }

2824

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

2825

.Object):

2826

exclude.add(name)

2827

2828

client_dict["encrypted_secret"] = (client

2829

.encrypted_secret)

2830

for attr in client.client_structure:

2831

if attr not in exclude:

2832

client_dict[attr] = getattr(client, attr)

2833

2834

clients[client.name] = client_dict

2835

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

2836

2837

try:

2838

with tempfile.NamedTemporaryFile(

2839

mode='wb',

2840

suffix=".pickle",

2841

prefix='clients-',

2842

dir=os.path.dirname(stored_state_path),

2843

delete=False) as stored_state:

2844

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

2845

tempname = stored_state.name

2846

os.rename(tempname, stored_state_path)

2847

except (IOError, OSError) as e:

2848

if not debug:

2849

try:

2850

os.remove(tempname)

2851

except NameError:

2852

pass

2853

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

2854

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

2855

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

2856

else:

2857

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

2858

exc_info=e)

2859

raise

2860

2861

# Delete all clients, and settings from config

2862

2140

while tcp_server.clients:

2863

name, client = tcp_server.clients.popitem()

2141

client = tcp_server.clients.pop()

2864

2142

if use_dbus:

2865

2143

client.remove_from_connection()

2144

client.disable_hook = None

2866

2145

# Don't signal anything except ClientRemoved

2867

2146

client.disable(quiet=True)

2868

2147

if use_dbus:

2869

2148

# Emit D-Bus signal

2870

mandos_dbus_service.ClientRemoved(

2871

client.dbus_object_path, client.name)

2872

client_settings.clear()

2149

mandos_dbus_service.ClientRemoved(client

2150

.dbus_object_path,

2151

client.name)

2873

2152

2874

2153

atexit.register(cleanup)

2875

2154

2876

for client in tcp_server.clients.itervalues():

2155

for client in tcp_server.clients:

2877

2156

if use_dbus:

2878

2157

# Emit D-Bus signal

2879

2158

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2880

# Need to initiate checking of clients

2881

if client.enabled:

2882

client.init_checker()

2159

client.enable()

2883

2160

2884

2161

tcp_server.enable()

2885

2162

tcp_server.server_activate()

2886

2163

2887

2164

# Find out what port we got

2888

if zeroconf:

2889

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

2165

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

2890

2166

if use_ipv6:

2891

2167

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

2892

" flowinfo %d, scope_id %d",

2893

*tcp_server.socket.getsockname())

2168

" flowinfo %d, scope_id %d"

2169

% tcp_server.socket.getsockname())

2894

2170

else: # IPv4

2895

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

2896

*tcp_server.socket.getsockname())

2171

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

2172

% tcp_server.socket.getsockname())

2897

2173

2898

2174

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

2899

2175

2900

2176

try:

2901

if zeroconf:

2902

# From the Avahi example code

2903

try:

2904

service.activate()

2905

except dbus.exceptions.DBusException as error:

2906

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

2907

cleanup()

2908

sys.exit(1)

2909

# 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

2910

2185

2911

2186

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

2912

2187

lambda *args, **kwargs:

2916

2191

logger.debug("Starting main loop")

2917

2192

main_loop.run()

2918

2193

except AvahiError as error:

2919

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

2194

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

2920

2195

cleanup()

2921

2196

sys.exit(1)

2922

2197

except KeyboardInterrupt: