/mandos/trunk : revision 738.1.6

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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_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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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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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.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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"""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 = (logging.handlers.SysLogHandler

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(facility =

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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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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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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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with tempfile.NamedTemporaryFile(dir=self.tempdir

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) 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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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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with tempfile.NamedTemporaryFile(dir = self.tempdir

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) 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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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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decrypted_plaintext, err = proc.communicate(input

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= 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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return super(AvahiError, self).__init__(value, *args,

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**kwargs)

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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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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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" 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.name = str(self.server

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.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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

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self.name)

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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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raise AvahiGroupError("State changed: {!s}"

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.format(error))

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def cleanup(self):

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

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

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

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

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bad_states = {

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avahi.SERVER_INVALID: "Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION: "Zeroconf server name collision",

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avahi.SERVER_FAILURE: "Zeroconf server failure",

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}

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bad_states = { avahi.SERVER_INVALID:

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"Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION:

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"Zeroconf server name collision",

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avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

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if state in bad_states:

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if bad_states[state] is not None:

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if error is None:

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follow_name_owner_changes=True),

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avahi.DBUS_INTERFACE_SERVER)

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self.server.connect_to_signal("StateChanged",

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self.server_state_changed)

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self.server_state_changed)

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

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

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

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

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syslogger.setFormatter(logging.Formatter(

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

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.format(self.name)))

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syslogger.setFormatter(logging.Formatter

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

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

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.format(self.name)))

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return ret

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def call_pipe(connection, # : multiprocessing.Connection

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func, *args, **kwargs):

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

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

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return value on the provided multiprocessing.Connection.

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"""

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

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connection.close()

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class Client(object):

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

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last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, -2 means no checker completed yet.

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last_checker_signal: The signal which killed the last checker, if

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last_checker_status is -1

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

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

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D-Bus identifiers

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

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"last_approval_request", "last_checked_ok",

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

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client_defaults = {

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"timeout": "PT5M",

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"extended_timeout": "PT15M",

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"interval": "PT2M",

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

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"host": "",

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"approval_delay": "PT0S",

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"approval_duration": "PT1S",

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"approved_by_default": "True",

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"enabled": "True",

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}

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client_defaults = { "timeout": "PT5M",

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"extended_timeout": "PT15M",

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"interval": "PT2M",

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

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"host": "",

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"approval_delay": "PT0S",

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"approval_duration": "PT1S",

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"approved_by_default": "True",

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"enabled": "True",

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}

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@staticmethod

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def config_parser(config):

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

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"enabled")

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# Uppercase and remove spaces from fingerprint for later

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# comparison purposes with return value from the

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# fingerprint() function

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

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.replace(" ", ""))

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if "secret" in section:

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self.expires = None

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

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# Uppercase and remove spaces from fingerprint for later

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# comparison purposes with return value from the fingerprint()

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# function

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

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

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datetime.datetime.utcnow())

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self.current_checker_command = None

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self.approved = None

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self.approvals_pending = 0

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self.changedstate = multiprocessing_manager.Condition(

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multiprocessing_manager.Lock())

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self.client_structure = [attr

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for attr in self.__dict__.iterkeys()

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self.changedstate = (multiprocessing_manager

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.Condition(multiprocessing_manager

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.Lock()))

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self.client_structure = [attr for attr in

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self.__dict__.iterkeys()

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if not attr.startswith("_")]

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self.client_structure.append("client_structure")

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for name, t in inspect.getmembers(

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

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for name, t in inspect.getmembers(type(self),

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lambda obj:

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isinstance(obj,

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property)):

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if not name.startswith("_"):

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self.client_structure.append(name)

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# and every interval from then on.

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if self.checker_initiator_tag is not None:

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gobject.source_remove(self.checker_initiator_tag)

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self.checker_initiator_tag = gobject.timeout_add(

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

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self.start_checker)

611

self.checker_initiator_tag = (gobject.timeout_add

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(int(self.interval

613

.total_seconds() * 1000),

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self.start_checker))

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

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if self.disable_initiator_tag is not None:

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gobject.source_remove(self.disable_initiator_tag)

644

self.disable_initiator_tag = gobject.timeout_add(

645

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

618

self.disable_initiator_tag = (gobject.timeout_add

619

(int(self.timeout

620

.total_seconds() * 1000),

621

self.disable))

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622

# Also start a new checker *right now*.

647

623

self.start_checker()

648

624

649

def checker_callback(self, source, condition, connection,

650

command):

625

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

651

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

652

627

self.checker_callback_tag = None

653

628

self.checker = None

654

# Read return code from connection (see call_pipe)

655

returncode = connection.recv()

656

connection.close()

657

658

if returncode >= 0:

659

self.last_checker_status = returncode

660

self.last_checker_signal = None

629

if os.WIFEXITED(condition):

630

self.last_checker_status = os.WEXITSTATUS(condition)

661

631

if self.last_checker_status == 0:

662

632

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

663

633

vars(self))

664

634

self.checked_ok()

665

635

else:

666

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

636

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

637

vars(self))

667

638

else:

668

639

self.last_checker_status = -1

669

self.last_checker_signal = -returncode

670

640

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

671

641

vars(self))

672

return False

673

642

674

643

def checked_ok(self):

675

644

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

676

645

self.last_checked_ok = datetime.datetime.utcnow()

677

646

self.last_checker_status = 0

678

self.last_checker_signal = None

679

647

self.bump_timeout()

680

648

681

649

def bump_timeout(self, timeout=None):

686

654

gobject.source_remove(self.disable_initiator_tag)

687

655

self.disable_initiator_tag = None

688

656

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

689

self.disable_initiator_tag = gobject.timeout_add(

690

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

657

self.disable_initiator_tag = (gobject.timeout_add

658

(int(timeout.total_seconds()

659

* 1000), self.disable))

691

660

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

692

661

693

662

def need_approval(self):

707

676

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

708

677

# should be.

709

678

710

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

711

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

712

self.checker.join()

713

self.checker = None

679

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

680

try:

681

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

682

except AttributeError:

683

pass

684

except OSError as error:

685

if error.errno != errno.ECHILD:

686

raise

687

else:

688

if pid:

689

logger.warning("Checker was a zombie")

690

gobject.source_remove(self.checker_callback_tag)

691

self.checker_callback(pid, status,

692

self.current_checker_command)

714

693

# Start a new checker if needed

715

694

if self.checker is None:

716

695

# Escape attributes for the shell

717

escaped_attrs = {

718

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

719

for attr in self.runtime_expansions }

696

escaped_attrs = { attr:

697

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

698

for attr in self.runtime_expansions }

720

699

try:

721

700

command = self.checker_command % escaped_attrs

722

701

except TypeError as error:

723

702

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

724

self.checker_command,

703

self.checker_command, exc_info=error)

704

return True # Try again later

705

self.current_checker_command = command

706

try:

707

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

708

command, self.name)

709

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

710

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

711

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

712

# always replaced by /dev/null.)

713

# The exception is when not debugging but nevertheless

714

# running in the foreground; use the previously

715

# created wnull.

716

popen_args = {}

717

if (not self.server_settings["debug"]

718

and self.server_settings["foreground"]):

719

popen_args.update({"stdout": wnull,

720

"stderr": wnull })

721

self.checker = subprocess.Popen(command,

722

close_fds=True,

723

shell=True, cwd="/",

724

**popen_args)

725

except OSError as error:

726

logger.error("Failed to start subprocess",

725

727

exc_info=error)

726

return True # Try again later

727

self.current_checker_command = command

728

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

729

self.name)

730

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

731

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

732

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

733

# always replaced by /dev/null.)

734

# The exception is when not debugging but nevertheless

735

# running in the foreground; use the previously

736

# created wnull.

737

popen_args = { "close_fds": True,

738

"shell": True,

739

"cwd": "/" }

740

if (not self.server_settings["debug"]

741

and self.server_settings["foreground"]):

742

popen_args.update({"stdout": wnull,

743

"stderr": wnull })

744

pipe = multiprocessing.Pipe(duplex = False)

745

self.checker = multiprocessing.Process(

746

target = call_pipe,

747

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

748

kwargs = popen_args)

749

self.checker.start()

750

self.checker_callback_tag = gobject.io_add_watch(

751

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

752

self.checker_callback, pipe[0], command)

728

return True

729

self.checker_callback_tag = (gobject.child_watch_add

730

(self.checker.pid,

731

self.checker_callback,

732

data=command))

733

# The checker may have completed before the gobject

734

# watch was added. Check for this.

735

try:

736

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

737

except OSError as error:

738

if error.errno == errno.ECHILD:

739

# This should never happen

740

logger.error("Child process vanished",

741

exc_info=error)

742

return True

743

raise

744

if pid:

745

gobject.source_remove(self.checker_callback_tag)

746

self.checker_callback(pid, status, command)

753

747

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

754

748

return True

755

749

761

755

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

762

756

return

763

757

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

764

self.checker.terminate()

758

try:

759

self.checker.terminate()

760

#time.sleep(0.5)

761

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

762

# self.checker.kill()

763

except OSError as error:

764

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

765

raise

765

766

self.checker = None

766

767

768

def dbus_service_property(dbus_interface,

769

signature="v",

770

access="readwrite",

771

byte_arrays=False):

769

def dbus_service_property(dbus_interface, signature="v",

770

access="readwrite", byte_arrays=False):

772

771

"""Decorators for marking methods of a DBusObjectWithProperties to

773

772

become properties on the D-Bus.

774

773

784

783

if byte_arrays and signature != "ay":

785

784

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

786

785

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

787

788

786

def decorator(func):

789

787

func._dbus_is_property = True

790

788

func._dbus_interface = dbus_interface

795

793

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

796

794

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

797

795

return func

798

799

796

return decorator

800

797

801

798

810

807

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

811

808

"false"}

812

809

"""

813

814

810

def decorator(func):

815

811

func._dbus_is_interface = True

816

812

func._dbus_interface = dbus_interface

817

813

func._dbus_name = dbus_interface

818

814

return func

819

820

815

return decorator

821

816

822

817

832

827

def Property_dbus_property(self):

833

828

return dbus.Boolean(False)

834

829

"""

835

836

830

def decorator(func):

837

831

func._dbus_annotations = annotations

838

832

return func

839

840

833

return decorator

841

834

842

835

845

838

"""

846

839

pass

847

840

848

849

841

class DBusPropertyAccessException(DBusPropertyException):

850

842

"""A property's access permissions disallows an operation.

851

843

"""

879

871

def _get_all_dbus_things(self, thing):

880

872

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

881

873

"""

882

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

874

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

875

name),

883

876

athing.__get__(self))

884

877

for cls in self.__class__.__mro__

885

878

for name, athing in

886

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

879

inspect.getmembers(cls,

880

self._is_dbus_thing(thing)))

887

881

888

882

def _get_dbus_property(self, interface_name, property_name):

889

883

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

890

884

property with the specified name and interface.

891

885

"""

892

for cls in self.__class__.__mro__:

893

for name, value in inspect.getmembers(

894

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

886

for cls in self.__class__.__mro__:

887

for name, value in (inspect.getmembers

888

(cls,

889

self._is_dbus_thing("property"))):

895

890

if (value._dbus_name == property_name

896

891

and value._dbus_interface == interface_name):

897

892

return value.__get__(self)

898

893

899

894

# No such property

900

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

901

self.dbus_object_path, interface_name, property_name))

895

raise DBusPropertyNotFound(self.dbus_object_path + ":"

896

+ interface_name + "."

897

+ property_name)

902

898

903

@dbus.service.method(dbus.PROPERTIES_IFACE,

904

in_signature="ss",

899

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

905

900

out_signature="v")

906

901

def Get(self, interface_name, property_name):

907

902

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

932

927

for byte in value))

933

928

prop(value)

934

929

935

@dbus.service.method(dbus.PROPERTIES_IFACE,

936

in_signature="s",

930

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

937

931

out_signature="a{sv}")

938

932

def GetAll(self, interface_name):

939

933

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

954

948

if not hasattr(value, "variant_level"):

955

949

properties[name] = value

956

950

continue

957

properties[name] = type(value)(

958

value, variant_level = value.variant_level + 1)

951

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

952

value.variant_level+1)

959

953

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

960

954

961

955

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

979

973

connection)

980

974

try:

981

975

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

982

983

976

def make_tag(document, name, prop):

984

977

e = document.createElement("property")

985

978

e.setAttribute("name", name)

986

979

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

987

980

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

988

981

return e

989

990

982

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

991

983

# Add property tags

992

984

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

1004

996

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

1005

997

and prop._dbus_interface

1006

998

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

1007

annots.update(getattr(

1008

prop, "_dbus_annotations", {}))

999

annots.update(getattr

1000

(prop,

1001

"_dbus_annotations",

1002

{}))

1009

1003

for name, value in annots.items():

1010

1004

ann_tag = document.createElement(

1011

1005

"annotation")

1016

1010

for annotation, value in dict(

1017

1011

itertools.chain.from_iterable(

1018

1012

annotations().items()

1019

for name, annotations

1020

in self._get_all_dbus_things("interface")

1013

for name, annotations in

1014

self._get_all_dbus_things("interface")

1021

1015

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

1022

1016

)).items():

1023

1017

ann_tag = document.createElement("annotation")

1052

1046

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

1053

1047

if dt is None:

1054

1048

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

1055

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

1049

return dbus.String(dt.isoformat(),

1050

variant_level=variant_level)

1056

1051

1057

1052

1058

1053

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1078

1073

(from DBusObjectWithProperties) and interfaces (from the

1079

1074

dbus_interface_annotations decorator).

1080

1075

"""

1081

1082

1076

def wrapper(cls):

1083

1077

for orig_interface_name, alt_interface_name in (

1084

alt_interface_names.items()):

1078

alt_interface_names.items()):

1085

1079

attr = {}

1086

1080

interface_names = set()

1087

1081

# Go though all attributes of the class

1089

1083

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

1090

1084

# with the wrong interface name

1091

1085

if (not hasattr(attribute, "_dbus_interface")

1092

or not attribute._dbus_interface.startswith(

1093

orig_interface_name)):

1086

or not attribute._dbus_interface

1087

.startswith(orig_interface_name)):

1094

1088

continue

1095

1089

# Create an alternate D-Bus interface name based on

1096

1090

# the current name

1097

alt_interface = attribute._dbus_interface.replace(

1098

orig_interface_name, alt_interface_name)

1091

alt_interface = (attribute._dbus_interface

1092

.replace(orig_interface_name,

1093

alt_interface_name))

1099

1094

interface_names.add(alt_interface)

1100

1095

# Is this a D-Bus signal?

1101

1096

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

1102

if sys.version_info.major == 2:

1103

# Extract the original non-method undecorated

1104

# function by black magic

1105

nonmethod_func = (dict(

1097

# Extract the original non-method undecorated

1098

# function by black magic

1099

nonmethod_func = (dict(

1106

1100

zip(attribute.func_code.co_freevars,

1107

attribute.__closure__))

1108

["func"].cell_contents)

1109

else:

1110

nonmethod_func = attribute

1101

attribute.__closure__))["func"]

1102

.cell_contents)

1111

1103

# Create a new, but exactly alike, function

1112

1104

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

1113

1105

# with the alternate D-Bus interface name

1114

if sys.version_info.major == 2:

1115

new_function = types.FunctionType(

1116

nonmethod_func.func_code,

1117

nonmethod_func.func_globals,

1118

nonmethod_func.func_name,

1119

nonmethod_func.func_defaults,

1120

nonmethod_func.func_closure)

1121

else:

1122

new_function = types.FunctionType(

1123

nonmethod_func.__code__,

1124

nonmethod_func.__globals__,

1125

nonmethod_func.__name__,

1126

nonmethod_func.__defaults__,

1127

nonmethod_func.__closure__)

1128

new_function = (dbus.service.signal(

1129

alt_interface,

1130

attribute._dbus_signature)(new_function))

1106

new_function = (dbus.service.signal

1107

(alt_interface,

1108

attribute._dbus_signature)

1109

(types.FunctionType(

1110

nonmethod_func.func_code,

1111

nonmethod_func.func_globals,

1112

nonmethod_func.func_name,

1113

nonmethod_func.func_defaults,

1114

nonmethod_func.func_closure)))

1131

1115

# Copy annotations, if any

1132

1116

try:

1133

new_function._dbus_annotations = dict(

1134

attribute._dbus_annotations)

1117

new_function._dbus_annotations = (

1118

dict(attribute._dbus_annotations))

1135

1119

except AttributeError:

1136

1120

pass

1137

1121

# Define a creator of a function to call both the

1142

1126

"""This function is a scope container to pass

1143

1127

func1 and func2 to the "call_both" function

1144

1128

outside of its arguments"""

1145

1146

1129

def call_both(*args, **kwargs):

1147

1130

"""This function will emit two D-Bus

1148

1131

signals by calling func1 and func2"""

1149

1132

func1(*args, **kwargs)

1150

1133

func2(*args, **kwargs)

1151

1152

1134

return call_both

1153

1135

# Create the "call_both" function and add it to

1154

1136

# the class

1159

1141

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

1160

1142

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

1161

1143

# to the class.

1162

attr[attrname] = (

1163

dbus.service.method(

1164

alt_interface,

1165

attribute._dbus_in_signature,

1166

attribute._dbus_out_signature)

1167

(types.FunctionType(attribute.func_code,

1168

attribute.func_globals,

1169

attribute.func_name,

1170

attribute.func_defaults,

1171

attribute.func_closure)))

1144

attr[attrname] = (dbus.service.method

1145

(alt_interface,

1146

attribute._dbus_in_signature,

1147

attribute._dbus_out_signature)

1148

(types.FunctionType

1149

(attribute.func_code,

1150

attribute.func_globals,

1151

attribute.func_name,

1152

attribute.func_defaults,

1153

attribute.func_closure)))

1172

1154

# Copy annotations, if any

1173

1155

try:

1174

attr[attrname]._dbus_annotations = dict(

1175

attribute._dbus_annotations)

1156

attr[attrname]._dbus_annotations = (

1157

dict(attribute._dbus_annotations))

1176

1158

except AttributeError:

1177

1159

pass

1178

1160

# Is this a D-Bus property?

1181

1163

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

1182

1164

# property with the alternate D-Bus interface

1183

1165

# name. Add it to the class.

1184

attr[attrname] = (dbus_service_property(

1185

alt_interface, attribute._dbus_signature,

1186

attribute._dbus_access,

1187

attribute._dbus_get_args_options

1188

["byte_arrays"])

1189

(types.FunctionType(

1190

attribute.func_code,

1191

attribute.func_globals,

1192

attribute.func_name,

1193

attribute.func_defaults,

1194

attribute.func_closure)))

1166

attr[attrname] = (dbus_service_property

1167

(alt_interface,

1168

attribute._dbus_signature,

1169

attribute._dbus_access,

1170

attribute

1171

._dbus_get_args_options

1172

["byte_arrays"])

1173

(types.FunctionType

1174

(attribute.func_code,

1175

attribute.func_globals,

1176

attribute.func_name,

1177

attribute.func_defaults,

1178

attribute.func_closure)))

1195

1179

# Copy annotations, if any

1196

1180

try:

1197

attr[attrname]._dbus_annotations = dict(

1198

attribute._dbus_annotations)

1181

attr[attrname]._dbus_annotations = (

1182

dict(attribute._dbus_annotations))

1199

1183

except AttributeError:

1200

1184

pass

1201

1185

# Is this a D-Bus interface?

1204

1188

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

1205

1189

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

1206

1190

# to the class.

1207

attr[attrname] = (

1208

dbus_interface_annotations(alt_interface)

1209

(types.FunctionType(attribute.func_code,

1210

attribute.func_globals,

1211

attribute.func_name,

1212

attribute.func_defaults,

1213

attribute.func_closure)))

1191

attr[attrname] = (dbus_interface_annotations

1192

(alt_interface)

1193

(types.FunctionType

1194

(attribute.func_code,

1195

attribute.func_globals,

1196

attribute.func_name,

1197

attribute.func_defaults,

1198

attribute.func_closure)))

1214

1199

if deprecate:

1215

1200

# Deprecate all alternate interfaces

1216

1201

iname="_AlternateDBusNames_interface_annotation{}"

1217

1202

for interface_name in interface_names:

1218

1219

1203

@dbus_interface_annotations(interface_name)

1220

1204

def func(self):

1221

1205

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

1222

"true" }

1206

"true" }

1223

1207

# Find an unused name

1224

1208

for aname in (iname.format(i)

1225

1209

for i in itertools.count()):

1230

1214

# Replace the class with a new subclass of it with

1231

1215

# methods, signals, etc. as created above.

1232

1216

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

1233

(cls, ), attr)

1217

(cls,), attr)

1234

1218

return cls

1235

1236

1219

return wrapper

1237

1220

1238

1221

1239

1222

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

1240

"se.bsnet.fukt.Mandos"})

1223

"se.bsnet.fukt.Mandos"})

1241

1224

class ClientDBus(Client, DBusObjectWithProperties):

1242

1225

"""A Client class using D-Bus

1243

1226

1247

1230

"""

1248

1231

1249

1232

runtime_expansions = (Client.runtime_expansions

1250

+ ("dbus_object_path", ))

1233

+ ("dbus_object_path",))

1251

1234

1252

1235

_interface = "se.recompile.Mandos.Client"

1253

1236

1261

1244

client_object_name = str(self.name).translate(

1262

1245

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

1263

1246

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

1264

self.dbus_object_path = dbus.ObjectPath(

1265

"/clients/" + client_object_name)

1247

self.dbus_object_path = (dbus.ObjectPath

1248

("/clients/" + client_object_name))

1266

1249

DBusObjectWithProperties.__init__(self, self.bus,

1267

1250

self.dbus_object_path)

1268

1251

1269

def notifychangeproperty(transform_func, dbus_name,

1270

type_func=lambda x: x,

1271

variant_level=1,

1272

invalidate_only=False,

1252

def notifychangeproperty(transform_func,

1253

dbus_name, type_func=lambda x: x,

1254

variant_level=1, invalidate_only=False,

1273

1255

_interface=_interface):

1274

1256

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

1275

1257

its changes to DBus.

1282

1264

variant_level: D-Bus variant level. Default: 1

1283

1265

"""

1284

1266

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

1285

1286

1267

def setter(self, value):

1287

1268

if hasattr(self, "dbus_object_path"):

1288

1269

if (not hasattr(self, attrname) or

1289

1270

type_func(getattr(self, attrname, None))

1290

1271

!= type_func(value)):

1291

1272

if invalidate_only:

1292

self.PropertiesChanged(

1293

_interface, dbus.Dictionary(),

1294

dbus.Array((dbus_name, )))

1273

self.PropertiesChanged(_interface,

1274

dbus.Dictionary(),

1275

dbus.Array

1276

((dbus_name,)))

1295

1277

else:

1296

dbus_value = transform_func(

1297

type_func(value),

1298

variant_level = variant_level)

1278

dbus_value = transform_func(type_func(value),

1279

variant_level

1280

=variant_level)

1299

1281

self.PropertyChanged(dbus.String(dbus_name),

1300

1282

dbus_value)

1301

self.PropertiesChanged(

1302

_interface,

1303

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

1304

dbus_value }),

1305

dbus.Array())

1283

self.PropertiesChanged(_interface,

1284

dbus.Dictionary({

1285

dbus.String(dbus_name):

1286

dbus_value }), dbus.Array())

1306

1287

setattr(self, attrname, value)

1307

1288

1308

1289

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

1314

1295

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

1315

1296

last_enabled = notifychangeproperty(datetime_to_dbus,

1316

1297

"LastEnabled")

1317

checker = notifychangeproperty(

1318

dbus.Boolean, "CheckerRunning",

1319

type_func = lambda checker: checker is not None)

1298

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

1299

type_func = lambda checker:

1300

checker is not None)

1320

1301

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1321

1302

"LastCheckedOK")

1322

1303

last_checker_status = notifychangeproperty(dbus.Int16,

1325

1306

datetime_to_dbus, "LastApprovalRequest")

1326

1307

approved_by_default = notifychangeproperty(dbus.Boolean,

1327

1308

"ApprovedByDefault")

1328

approval_delay = notifychangeproperty(

1329

dbus.UInt64, "ApprovalDelay",

1330

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

1309

approval_delay = notifychangeproperty(dbus.UInt64,

1310

"ApprovalDelay",

1311

type_func =

1312

lambda td: td.total_seconds()

1313

* 1000)

1331

1314

approval_duration = notifychangeproperty(

1332

1315

dbus.UInt64, "ApprovalDuration",

1333

1316

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

1334

1317

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

1335

timeout = notifychangeproperty(

1336

dbus.UInt64, "Timeout",

1337

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

1318

timeout = notifychangeproperty(dbus.UInt64, "Timeout",

1319

type_func = lambda td:

1320

td.total_seconds() * 1000)

1338

1321

extended_timeout = notifychangeproperty(

1339

1322

dbus.UInt64, "ExtendedTimeout",

1340

1323

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

1341

interval = notifychangeproperty(

1342

dbus.UInt64, "Interval",

1343

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

1324

interval = notifychangeproperty(dbus.UInt64,

1325

"Interval",

1326

type_func =

1327

lambda td: td.total_seconds()

1328

* 1000)

1344

1329

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

1345

1330

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

1346

1331

invalidate_only=True)

1356

1341

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

1357

1342

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

1358

1343

1359

def checker_callback(self, source, condition,

1360

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

1361

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

1362

connection, command, *args,

1363

**kwargs)

1364

exitstatus = self.last_checker_status

1365

if exitstatus >= 0:

1344

def checker_callback(self, pid, condition, command,

1345

*args, **kwargs):

1346

self.checker_callback_tag = None

1347

self.checker = None

1348

if os.WIFEXITED(condition):

1349

exitstatus = os.WEXITSTATUS(condition)

1366

1350

# Emit D-Bus signal

1367

1351

self.CheckerCompleted(dbus.Int16(exitstatus),

1368

dbus.Int64(0),

1352

dbus.Int64(condition),

1369

1353

dbus.String(command))

1370

1354

else:

1371

1355

# Emit D-Bus signal

1372

1356

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

1373

dbus.Int64(

1374

self.last_checker_signal),

1357

dbus.Int64(condition),

1375

1358

dbus.String(command))

1376

return ret

1359

1360

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

1361

*args, **kwargs)

1377

1362

1378

1363

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

1379

1364

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

1484

1469

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

1485

1470

1486

1471

# ApprovedByDefault - property

1487

@dbus_service_property(_interface,

1488

signature="b",

1472

@dbus_service_property(_interface, signature="b",

1489

1473

access="readwrite")

1490

1474

def ApprovedByDefault_dbus_property(self, value=None):

1491

1475

if value is None: # get

1493

1477

self.approved_by_default = bool(value)

1494

1478

1495

1479

# ApprovalDelay - property

1496

@dbus_service_property(_interface,

1497

signature="t",

1480

@dbus_service_property(_interface, signature="t",

1498

1481

access="readwrite")

1499

1482

def ApprovalDelay_dbus_property(self, value=None):

1500

1483

if value is None: # get

1503

1486

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

1504

1487

1505

1488

# ApprovalDuration - property

1506

@dbus_service_property(_interface,

1507

signature="t",

1489

@dbus_service_property(_interface, signature="t",

1508

1490

access="readwrite")

1509

1491

def ApprovalDuration_dbus_property(self, value=None):

1510

1492

if value is None: # get

1523

1505

return dbus.String(self.fingerprint)

1524

1506

1525

1507

# Host - property

1526

@dbus_service_property(_interface,

1527

signature="s",

1508

@dbus_service_property(_interface, signature="s",

1528

1509

access="readwrite")

1529

1510

def Host_dbus_property(self, value=None):

1530

1511

if value is None: # get

1542

1523

return datetime_to_dbus(self.last_enabled)

1543

1524

1544

1525

# Enabled - property

1545

@dbus_service_property(_interface,

1546

signature="b",

1526

@dbus_service_property(_interface, signature="b",

1547

1527

access="readwrite")

1548

1528

def Enabled_dbus_property(self, value=None):

1549

1529

if value is None: # get

1554

1534

self.disable()

1555

1535

1556

1536

# LastCheckedOK - property

1557

@dbus_service_property(_interface,

1558

signature="s",

1537

@dbus_service_property(_interface, signature="s",

1559

1538

access="readwrite")

1560

1539

def LastCheckedOK_dbus_property(self, value=None):

1561

1540

if value is not None:

1564

1543

return datetime_to_dbus(self.last_checked_ok)

1565

1544

1566

1545

# LastCheckerStatus - property

1567

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

1546

@dbus_service_property(_interface, signature="n",

1547

access="read")

1568

1548

def LastCheckerStatus_dbus_property(self):

1569

1549

return dbus.Int16(self.last_checker_status)

1570

1550

1579

1559

return datetime_to_dbus(self.last_approval_request)

1580

1560

1581

1561

# Timeout - property

1582

@dbus_service_property(_interface,

1583

signature="t",

1562

@dbus_service_property(_interface, signature="t",

1584

1563

access="readwrite")

1585

1564

def Timeout_dbus_property(self, value=None):

1586

1565

if value is None: # get

1599

1578

is None):

1600

1579

return

1601

1580

gobject.source_remove(self.disable_initiator_tag)

1602

self.disable_initiator_tag = gobject.timeout_add(

1603

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

1604

self.disable)

1581

self.disable_initiator_tag = (

1582

gobject.timeout_add(

1583

int((self.expires - now).total_seconds()

1584

* 1000), self.disable))

1605

1585

1606

1586

# ExtendedTimeout - property

1607

@dbus_service_property(_interface,

1608

signature="t",

1587

@dbus_service_property(_interface, signature="t",

1609

1588

access="readwrite")

1610

1589

def ExtendedTimeout_dbus_property(self, value=None):

1611

1590

if value is None: # get

1614

1593

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

1615

1594

1616

1595

# Interval - property

1617

@dbus_service_property(_interface,

1618

signature="t",

1596

@dbus_service_property(_interface, signature="t",

1619

1597

access="readwrite")

1620

1598

def Interval_dbus_property(self, value=None):

1621

1599

if value is None: # get

1626

1604

if self.enabled:

1627

1605

# Reschedule checker run

1628

1606

gobject.source_remove(self.checker_initiator_tag)

1629

self.checker_initiator_tag = gobject.timeout_add(

1630

value, self.start_checker)

1631

self.start_checker() # Start one now, too

1607

self.checker_initiator_tag = (gobject.timeout_add

1608

(value, self.start_checker))

1609

self.start_checker() # Start one now, too

1632

1610

1633

1611

# Checker - property

1634

@dbus_service_property(_interface,

1635

signature="s",

1612

@dbus_service_property(_interface, signature="s",

1636

1613

access="readwrite")

1637

1614

def Checker_dbus_property(self, value=None):

1638

1615

if value is None: # get

1640

1617

self.checker_command = str(value)

1641

1618

1642

1619

# CheckerRunning - property

1643

@dbus_service_property(_interface,

1644

signature="b",

1620

@dbus_service_property(_interface, signature="b",

1645

1621

access="readwrite")

1646

1622

def CheckerRunning_dbus_property(self, value=None):

1647

1623

if value is None: # get

1657

1633

return self.dbus_object_path # is already a dbus.ObjectPath

1658

1634

1659

1635

# Secret = property

1660

@dbus_service_property(_interface,

1661

signature="ay",

1662

access="write",

1663

byte_arrays=True)

1636

@dbus_service_property(_interface, signature="ay",

1637

access="write", byte_arrays=True)

1664

1638

def Secret_dbus_property(self, value):

1665

1639

self.secret = bytes(value)

1666

1640

1672

1646

self._pipe = child_pipe

1673

1647

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

1674

1648

if not self._pipe.recv():

1675

raise KeyError(fpr)

1649

raise KeyError()

1676

1650

1677

1651

def __getattribute__(self, name):

1678

1652

if name == '_pipe':

1682

1656

if data[0] == 'data':

1683

1657

return data[1]

1684

1658

if data[0] == 'function':

1685

1686

1659

def func(*args, **kwargs):

1687

1660

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

1688

1661

return self._pipe.recv()[1]

1689

1690

1662

return func

1691

1663

1692

1664

def __setattr__(self, name, value):

1708

1680

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

1709

1681

self.server.child_pipe.fileno())

1710

1682

1711

session = gnutls.connection.ClientSession(

1712

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

1683

session = (gnutls.connection

1684

.ClientSession(self.request,

1685

gnutls.connection

1686

.X509Credentials()))

1713

1687

1714

1688

# Note: gnutls.connection.X509Credentials is really a

1715

1689

# generic GnuTLS certificate credentials object so long as

1724

1698

priority = self.server.gnutls_priority

1725

1699

if priority is None:

1726

1700

priority = "NORMAL"

1727

gnutls.library.functions.gnutls_priority_set_direct(

1728

session._c_object, priority, None)

1701

(gnutls.library.functions

1702

.gnutls_priority_set_direct(session._c_object,

1703

priority, None))

1729

1704

1730

1705

# Start communication using the Mandos protocol

1731

1706

# Get protocol number

1751

1726

approval_required = False

1752

1727

try:

1753

1728

try:

1754

fpr = self.fingerprint(

1755

self.peer_certificate(session))

1729

fpr = self.fingerprint(self.peer_certificate

1730

(session))

1756

1731

except (TypeError,

1757

1732

gnutls.errors.GNUTLSError) as error:

1758

1733

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

1773

1748

while True:

1774

1749

if not client.enabled:

1775

1750

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

1776

client.name)

1751

client.name)

1777

1752

if self.server.use_dbus:

1778

1753

# Emit D-Bus signal

1779

1754

client.Rejected("Disabled")

1826

1801

logger.warning("gnutls send failed",

1827

1802

exc_info=error)

1828

1803

return

1829

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

1830

len(client.secret) - (sent_size

1831

+ sent))

1804

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

1805

sent, len(client.secret)

1806

- (sent_size + sent))

1832

1807

sent_size += sent

1833

1808

1834

1809

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

1851

1826

def peer_certificate(session):

1852

1827

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

1853

1828

# If not an OpenPGP certificate...

1854

if (gnutls.library.functions.gnutls_certificate_type_get(

1855

session._c_object)

1829

if (gnutls.library.functions

1830

.gnutls_certificate_type_get(session._c_object)

1856

1831

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1857

1832

# ...do the normal thing

1858

1833

return session.peer_certificate

1872

1847

def fingerprint(openpgp):

1873

1848

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1874

1849

# New GnuTLS "datum" with the OpenPGP public key

1875

datum = gnutls.library.types.gnutls_datum_t(

1876

ctypes.cast(ctypes.c_char_p(openpgp),

1877

ctypes.POINTER(ctypes.c_ubyte)),

1878

ctypes.c_uint(len(openpgp)))

1850

datum = (gnutls.library.types

1851

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

1852

ctypes.POINTER

1853

(ctypes.c_ubyte)),

1854

ctypes.c_uint(len(openpgp))))

1879

1855

# New empty GnuTLS certificate

1880

1856

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1881

gnutls.library.functions.gnutls_openpgp_crt_init(

1882

ctypes.byref(crt))

1857

(gnutls.library.functions

1858

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

1883

1859

# Import the OpenPGP public key into the certificate

1884

gnutls.library.functions.gnutls_openpgp_crt_import(

1885

crt, ctypes.byref(datum),

1886

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

1860

(gnutls.library.functions

1861

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

1862

gnutls.library.constants

1863

.GNUTLS_OPENPGP_FMT_RAW))

1887

1864

# Verify the self signature in the key

1888

1865

crtverify = ctypes.c_uint()

1889

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1890

crt, 0, ctypes.byref(crtverify))

1866

(gnutls.library.functions

1867

.gnutls_openpgp_crt_verify_self(crt, 0,

1868

ctypes.byref(crtverify)))

1891

1869

if crtverify.value != 0:

1892

1870

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1893

raise gnutls.errors.CertificateSecurityError(

1894

"Verify failed")

1871

raise (gnutls.errors.CertificateSecurityError

1872

("Verify failed"))

1895

1873

# New buffer for the fingerprint

1896

1874

buf = ctypes.create_string_buffer(20)

1897

1875

buf_len = ctypes.c_size_t()

1898

1876

# Get the fingerprint from the certificate into the buffer

1899

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1900

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

1877

(gnutls.library.functions

1878

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

1879

ctypes.byref(buf_len)))

1901

1880

# Deinit the certificate

1902

1881

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1903

1882

# Convert the buffer to a Python bytestring

1909

1888

1910

1889

class MultiprocessingMixIn(object):

1911

1890

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

1912

1913

1891

def sub_process_main(self, request, address):

1914

1892

try:

1915

1893

self.finish_request(request, address)

1927

1905

1928

1906

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1929

1907

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

1930

1931

1908

def process_request(self, request, client_address):

1932

1909

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

1933

1910

1954

1931

interface: None or a network interface name (string)

1955

1932

use_ipv6: Boolean; to use IPv6 or not

1956

1933

"""

1957

1958

1934

def __init__(self, server_address, RequestHandlerClass,

1959

interface=None,

1960

use_ipv6=True,

1961

socketfd=None):

1935

interface=None, use_ipv6=True, socketfd=None):

1962

1936

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

1963

1937

creating a new one with socket.socket().

1964

1938

"""

2005

1979

self.interface)

2006

1980

else:

2007

1981

try:

2008

self.socket.setsockopt(

2009

socket.SOL_SOCKET, SO_BINDTODEVICE,

2010

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

1982

self.socket.setsockopt(socket.SOL_SOCKET,

1983

SO_BINDTODEVICE,

1984

(self.interface + "\0")

1985

.encode("utf-8"))

2011

1986

except socket.error as error:

2012

1987

if error.errno == errno.EPERM:

2013

1988

logger.error("No permission to bind to"

2031

2006

self.server_address = (any_address,

2032

2007

self.server_address[1])

2033

2008

elif not self.server_address[1]:

2034

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

2009

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

2010

0)

2035

2011

# if self.interface:

2036

2012

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

2037

2013

# 0, # port

2051

2027

2052

2028

Assumes a gobject.MainLoop event loop.

2053

2029

"""

2054

2055

2030

def __init__(self, server_address, RequestHandlerClass,

2056

interface=None,

2057

use_ipv6=True,

2058

clients=None,

2059

gnutls_priority=None,

2060

use_dbus=True,

2061

socketfd=None):

2031

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

2032

gnutls_priority=None, use_dbus=True, socketfd=None):

2062

2033

self.enabled = False

2063

2034

self.clients = clients

2064

2035

if self.clients is None:

2070

2041

interface = interface,

2071

2042

use_ipv6 = use_ipv6,

2072

2043

socketfd = socketfd)

2073

2074

2044

def server_activate(self):

2075

2045

if self.enabled:

2076

2046

return socketserver.TCPServer.server_activate(self)

2080

2050

2081

2051

def add_pipe(self, parent_pipe, proc):

2082

2052

# Call "handle_ipc" for both data and EOF events

2083

gobject.io_add_watch(

2084

parent_pipe.fileno(),

2085

gobject.IO_IN | gobject.IO_HUP,

2086

functools.partial(self.handle_ipc,

2087

parent_pipe = parent_pipe,

2088

proc = proc))

2053

gobject.io_add_watch(parent_pipe.fileno(),

2054

gobject.IO_IN | gobject.IO_HUP,

2055

functools.partial(self.handle_ipc,

2056

parent_pipe =

2057

parent_pipe,

2058

proc = proc))

2089

2059

2090

def handle_ipc(self, source, condition,

2091

parent_pipe=None,

2092

proc = None,

2093

client_object=None):

2060

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

2061

proc = None, client_object=None):

2094

2062

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

2095

2063

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

2096

2064

# Wait for other process to exit

2119

2087

parent_pipe.send(False)

2120

2088

return False

2121

2089

2122

gobject.io_add_watch(

2123

parent_pipe.fileno(),

2124

gobject.IO_IN | gobject.IO_HUP,

2125

functools.partial(self.handle_ipc,

2126

parent_pipe = parent_pipe,

2127

proc = proc,

2128

client_object = client))

2090

gobject.io_add_watch(parent_pipe.fileno(),

2091

gobject.IO_IN | gobject.IO_HUP,

2092

functools.partial(self.handle_ipc,

2093

parent_pipe =

2094

parent_pipe,

2095

proc = proc,

2096

client_object =

2097

client))

2129

2098

parent_pipe.send(True)

2130

2099

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

2131

2100

# same fileno

2137

2106

2138

2107

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

2139

2108

funcname)(*args,

2140

**kwargs)))

2109

**kwargs)))

2141

2110

2142

2111

if command == 'getattr':

2143

2112

attrname = request[1]

2144

if isinstance(client_object.__getattribute__(attrname),

2145

collections.Callable):

2146

parent_pipe.send(('function', ))

2113

if callable(client_object.__getattribute__(attrname)):

2114

parent_pipe.send(('function',))

2147

2115

else:

2148

parent_pipe.send((

2149

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

2116

parent_pipe.send(('data', client_object

2117

.__getattribute__(attrname)))

2150

2118

2151

2119

if command == 'setattr':

2152

2120

attrname = request[1]

2183

2151

# avoid excessive use of external libraries.

2184

2152

2185

2153

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

2186

Token = collections.namedtuple("Token", (

2187

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

2188

# a "group" containing digits

2189

"value", # datetime.timedelta or None

2190

"followers")) # Tokens valid after this token

2154

Token = collections.namedtuple("Token",

2155

("regexp", # To match token; if

2156

# "value" is not None,

2157

# must have a "group"

2158

# containing digits

2159

"value", # datetime.timedelta or

2160

# None

2161

"followers")) # Tokens valid after

2162

# this token

2191

2163

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

2192

2164

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

2193

2165

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

2194

2166

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

2195

2167

datetime.timedelta(seconds=1),

2196

frozenset((token_end, )))

2168

frozenset((token_end,)))

2197

2169

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

2198

2170

datetime.timedelta(minutes=1),

2199

2171

frozenset((token_second, token_end)))

2215

2187

frozenset((token_month, token_end)))

2216

2188

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

2217

2189

datetime.timedelta(weeks=1),

2218

frozenset((token_end, )))

2190

frozenset((token_end,)))

2219

2191

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

2220

2192

frozenset((token_year, token_month,

2221

2193

token_day, token_time,

2223

2195

# Define starting values

2224

2196

value = datetime.timedelta() # Value so far

2225

2197

found_token = None

2226

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

2198

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

2227

2199

s = duration # String left to parse

2228

2200

# Loop until end token is found

2229

2201

while found_token is not token_end:

2246

2218

break

2247

2219

else:

2248

2220

# No currently valid tokens were found

2249

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

2250

.format(duration))

2221

raise ValueError("Invalid RFC 3339 duration")

2251

2222

# End token found

2252

2223

return value

2253

2224

2290

2261

elif suffix == "w":

2291

2262

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

2292

2263

else:

2293

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

2264

raise ValueError("Unknown suffix {!r}"

2265

.format(suffix))

2294

2266

except IndexError as e:

2295

2267

raise ValueError(*(e.args))

2296

2268

timevalue += delta

2312

2284

# Close all standard open file descriptors

2313

2285

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

2314

2286

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

2315

raise OSError(errno.ENODEV,

2316

"{} not a character device"

2287

raise OSError(errno.ENODEV, "{} not a character device"

2317

2288

.format(os.devnull))

2318

2289

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

2319

2290

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

2385

2356

"port": "",

2386

2357

"debug": "False",

2387

2358

"priority":

2388

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

2389

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

2359

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",

2390

2360

"servicename": "Mandos",

2391

2361

"use_dbus": "True",

2392

2362

"use_ipv6": "True",

2396

2366

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

2397

2367

"foreground": "False",

2398

2368

"zeroconf": "True",

2399

}

2369

}

2400

2370

2401

2371

# Parse config file for server-global settings

2402

2372

server_config = configparser.SafeConfigParser(server_defaults)

2403

2373

del server_defaults

2404

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

2374

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

2375

"mandos.conf"))

2405

2376

# Convert the SafeConfigParser object to a dict

2406

2377

server_settings = server_config.defaults()

2407

2378

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

2425

2396

# Override the settings from the config file with command line

2426

2397

# options, if set.

2427

2398

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

2428

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

2429

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

2430

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

2399

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

2400

"use_dbus", "use_ipv6", "debuglevel", "restore",

2401

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

2431

2402

value = getattr(options, option)

2432

2403

if value is not None:

2433

2404

server_settings[option] = value

2448

2419

2449

2420

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

2450

2421

2451

if (not server_settings["zeroconf"]

2452

and not (server_settings["port"]

2453

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

2454

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

2422

if (not server_settings["zeroconf"] and

2423

not (server_settings["port"]

2424

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

2425

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

2426

" Zeroconf")

2455

2427

2456

2428

# For convenience

2457

2429

debug = server_settings["debug"]

2473

2445

initlogger(debug, level)

2474

2446

2475

2447

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

2476

syslogger.setFormatter(

2477

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

2478

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

2479

server_settings["servicename"])))

2448

syslogger.setFormatter(logging.Formatter

2449

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

2450

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

2451

.format(server_settings

2452

["servicename"])))

2480

2453

2481

2454

# Parse config file with clients

2482

2455

client_config = configparser.SafeConfigParser(Client

2490

2463

socketfd = None

2491

2464

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

2492

2465

socketfd = server_settings["socket"]

2493

tcp_server = MandosServer(

2494

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

2495

ClientHandler,

2496

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

2497

use_ipv6=use_ipv6,

2498

gnutls_priority=server_settings["priority"],

2499

use_dbus=use_dbus,

2500

socketfd=socketfd)

2466

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

2467

server_settings["port"]),

2468

ClientHandler,

2469

interface=(server_settings["interface"]

2470

or None),

2471

use_ipv6=use_ipv6,

2472

gnutls_priority=

2473

server_settings["priority"],

2474

use_dbus=use_dbus,

2475

socketfd=socketfd)

2501

2476

if not foreground:

2502

2477

pidfilename = "/run/mandos.pid"

2503

2478

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

2504

2479

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

2505

2480

pidfile = None

2506

2481

try:

2507

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

2482

pidfile = open(pidfilename, "w")

2508

2483

except IOError as e:

2509

2484

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

2510

2485

exc_info=e)

2537

2512

def debug_gnutls(level, string):

2538

2513

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

2539

2514

2540

gnutls.library.functions.gnutls_global_set_log_function(

2541

debug_gnutls)

2515

(gnutls.library.functions

2516

.gnutls_global_set_log_function(debug_gnutls))

2542

2517

2543

2518

# Redirect stdin so all checkers get /dev/null

2544

2519

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

2564

2539

if use_dbus:

2565

2540

try:

2566

2541

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

2567

bus,

2568

do_not_queue=True)

2569

old_bus_name = dbus.service.BusName(

2570

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

2571

do_not_queue=True)

2572

except dbus.exceptions.DBusException as e:

2542

bus, do_not_queue=True)

2543

old_bus_name = (dbus.service.BusName

2544

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

2545

do_not_queue=True))

2546

except dbus.exceptions.NameExistsException as e:

2573

2547

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

2574

2548

use_dbus = False

2575

2549

server_settings["use_dbus"] = False

2576

2550

tcp_server.use_dbus = False

2577

2551

if zeroconf:

2578

2552

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2579

service = AvahiServiceToSyslog(

2580

name = server_settings["servicename"],

2581

servicetype = "_mandos._tcp",

2582

protocol = protocol,

2583

bus = bus)

2553

service = AvahiServiceToSyslog(name =

2554

server_settings["servicename"],

2555

servicetype = "_mandos._tcp",

2556

protocol = protocol, bus = bus)

2584

2557

if server_settings["interface"]:

2585

service.interface = if_nametoindex(

2586

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

2558

service.interface = (if_nametoindex

2559

(server_settings["interface"]

2560

.encode("utf-8")))

2587

2561

2588

2562

global multiprocessing_manager

2589

2563

multiprocessing_manager = multiprocessing.Manager()

2608

2582

if server_settings["restore"]:

2609

2583

try:

2610

2584

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

2611

clients_data, old_client_settings = pickle.load(

2612

stored_state)

2585

clients_data, old_client_settings = (pickle.load

2586

(stored_state))

2613

2587

os.remove(stored_state_path)

2614

2588

except IOError as e:

2615

2589

if e.errno == errno.ENOENT:

2616

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

2617

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

2590

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

2591

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

2618

2592

else:

2619

2593

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

2620

2594

exc_info=e)

2621

2595

raise

2622

2596

except EOFError as e:

2623

2597

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

2624

"EOFError:",

2625

exc_info=e)

2598

"EOFError:", exc_info=e)

2626

2599

2627

2600

with PGPEngine() as pgp:

2628

2601

for client_name, client in clients_data.items():

2640

2613

# For each value in new config, check if it

2641

2614

# differs from the old config value (Except for

2642

2615

# the "secret" attribute)

2643

if (name != "secret"

2644

and (value !=

2645

old_client_settings[client_name][name])):

2616

if (name != "secret" and

2617

value != old_client_settings[client_name]

2618

[name]):

2646

2619

client[name] = value

2647

2620

except KeyError:

2648

2621

pass

2649

2622

2650

2623

# Clients who has passed its expire date can still be

2651

# enabled if its last checker was successful. A Client

2624

# enabled if its last checker was successful. Clients

2652

2625

# whose checker succeeded before we stored its state is

2653

2626

# assumed to have successfully run all checkers during

2654

2627

# downtime.

2657

2630

if not client["last_checked_ok"]:

2658

2631

logger.warning(

2659

2632

"disabling client {} - Client never "

2660

"performed a successful checker".format(

2661

client_name))

2633

"performed a successful checker"

2634

.format(client_name))

2662

2635

client["enabled"] = False

2663

2636

elif client["last_checker_status"] != 0:

2664

2637

logger.warning(

2665

2638

"disabling client {} - Client last"

2666

" checker failed with error code"

2667

" {}".format(

2668

client_name,

2669

client["last_checker_status"]))

2639

" checker failed with error code {}"

2640

.format(client_name,

2641

client["last_checker_status"]))

2670

2642

client["enabled"] = False

2671

2643

else:

2672

client["expires"] = (

2673

datetime.datetime.utcnow()

2674

+ client["timeout"])

2644

client["expires"] = (datetime.datetime

2645

.utcnow()

2646

+ client["timeout"])

2675

2647

logger.debug("Last checker succeeded,"

2676

" keeping {} enabled".format(

2677

client_name))

2648

" keeping {} enabled"

2649

.format(client_name))

2678

2650

try:

2679

client["secret"] = pgp.decrypt(

2680

client["encrypted_secret"],

2681

client_settings[client_name]["secret"])

2651

client["secret"] = (

2652

pgp.decrypt(client["encrypted_secret"],

2653

client_settings[client_name]

2654

["secret"]))

2682

2655

except PGPError:

2683

2656

# If decryption fails, we use secret from new settings

2684

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

2685

client_name))

2686

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

2687

["secret"])

2657

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

2658

.format(client_name))

2659

client["secret"] = (

2660

client_settings[client_name]["secret"])

2688

2661

2689

2662

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

2690

2663

for client_name in (set(old_client_settings)

2697

2670

# Create all client objects

2698

2671

for client_name, client in clients_data.items():

2699

2672

tcp_server.clients[client_name] = client_class(

2700

name = client_name,

2701

settings = client,

2673

name = client_name, settings = client,

2702

2674

server_settings = server_settings)

2703

2675

2704

2676

if not tcp_server.clients:

2706

2678

2707

2679

if not foreground:

2708

2680

if pidfile is not None:

2709

pid = os.getpid()

2710

2681

try:

2711

2682

with pidfile:

2712

print(pid, file=pidfile)

2683

pid = os.getpid()

2684

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

2713

2685

except IOError:

2714

2686

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

2715

2687

pidfilename, pid)

2720

2692

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

2721

2693

2722

2694

if use_dbus:

2723

2724

@alternate_dbus_interfaces(

2725

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

2695

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

2696

"se.bsnet.fukt.Mandos"})

2726

2697

class MandosDBusService(DBusObjectWithProperties):

2727

2698

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

2728

2729

2699

def __init__(self):

2730

2700

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

2731

2732

2701

_interface = "se.recompile.Mandos"

2733

2702

2734

2703

@dbus_interface_annotations(_interface)

2735

2704

def _foo(self):

2736

return {

2737

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

2738

"false" }

2705

return { "org.freedesktop.DBus.Property"

2706

".EmitsChangedSignal":

2707

"false"}

2739

2708

2740

2709

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

2741

2710

def ClientAdded(self, objpath):

2755

2724

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

2756

2725

def GetAllClients(self):

2757

2726

"D-Bus method"

2758

return dbus.Array(c.dbus_object_path for c in

2727

return dbus.Array(c.dbus_object_path

2728

for c in

2759

2729

tcp_server.clients.itervalues())

2760

2730

2761

2731

@dbus.service.method(_interface,

2810

2780

# + secret.

2811

2781

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

2812

2782

"checker", "server_settings" }

2813

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

2814

.Object):

2783

for name, typ in (inspect.getmembers

2784

(dbus.service.Object)):

2815

2785

exclude.add(name)

2816

2786

2817

2787

client_dict["encrypted_secret"] = (client

2824

2794

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

2825

2795

2826

2796

try:

2827

with tempfile.NamedTemporaryFile(

2828

mode='wb',

2829

suffix=".pickle",

2830

prefix='clients-',

2831

dir=os.path.dirname(stored_state_path),

2832

delete=False) as stored_state:

2797

with (tempfile.NamedTemporaryFile

2798

(mode='wb', suffix=".pickle", prefix='clients-',

2799

dir=os.path.dirname(stored_state_path),

2800

delete=False)) as stored_state:

2833

2801

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

2834

tempname = stored_state.name

2802

tempname=stored_state.name

2835

2803

os.rename(tempname, stored_state_path)

2836

2804

except (IOError, OSError) as e:

2837

2805

if not debug:

2856

2824

client.disable(quiet=True)

2857

2825

if use_dbus:

2858

2826

# Emit D-Bus signal

2859

mandos_dbus_service.ClientRemoved(

2860

client.dbus_object_path, client.name)

2827

mandos_dbus_service.ClientRemoved(client

2828

.dbus_object_path,

2829

client.name)

2861

2830

client_settings.clear()

2862

2831

2863

2832

atexit.register(cleanup)

2916

2885

# Must run before the D-Bus bus name gets deregistered

2917

2886

cleanup()

2918

2887

2919

2920

2888

if __name__ == '__main__':

2921

2889

main()