/mandos/trunk : revision 759

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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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import SocketServer as socketserver

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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 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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import ConfigParser as configparser

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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 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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import cPickle as pickle

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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 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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import gobject

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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 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"))

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.if_nametoindex)

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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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"""init logger and add loglevel"""

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global syslogger

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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 = (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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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(dir=self.tempdir

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) as passfile:

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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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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir = self.tempdir

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) as passfile:

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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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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

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= data)

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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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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, 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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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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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(self.server

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.GetAlternativeServiceName(self.name))

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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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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}"

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.format(error))

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raise AvahiGroupError("State changed: {!s}".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 = { 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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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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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]:'

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' %(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]: %(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 = { "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 = {

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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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@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

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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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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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if not attr.startswith("_")]

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self.client_structure.append("client_structure")

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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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for name, t in inspect.getmembers(

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

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.total_seconds() * 1000),

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self.start_checker))

638

self.checker_initiator_tag = gobject.timeout_add(

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

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self.start_checker)

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

616

642

if self.disable_initiator_tag is not None:

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gobject.source_remove(self.disable_initiator_tag)

618

self.disable_initiator_tag = (gobject.timeout_add

619

(int(self.timeout

620

.total_seconds() * 1000),

621

self.disable))

644

self.disable_initiator_tag = gobject.timeout_add(

645

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

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646

# Also start a new checker *right now*.

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self.start_checker()

624

648

625

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

649

def checker_callback(self, source, condition, connection,

650

command):

626

651

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

627

652

self.checker_callback_tag = None

628

653

self.checker = None

629

if os.WIFEXITED(condition):

630

self.last_checker_status = os.WEXITSTATUS(condition)

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

631

661

if self.last_checker_status == 0:

632

662

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

633

663

vars(self))

634

664

self.checked_ok()

635

665

else:

636

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

637

vars(self))

666

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

638

667

else:

639

668

self.last_checker_status = -1

669

self.last_checker_signal = -returncode

640

670

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

641

671

vars(self))

672

return False

642

673

643

674

def checked_ok(self):

644

675

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

645

676

self.last_checked_ok = datetime.datetime.utcnow()

646

677

self.last_checker_status = 0

678

self.last_checker_signal = None

647

679

self.bump_timeout()

648

680

649

681

def bump_timeout(self, timeout=None):

654

686

gobject.source_remove(self.disable_initiator_tag)

655

687

self.disable_initiator_tag = None

656

688

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

657

self.disable_initiator_tag = (gobject.timeout_add

658

(int(timeout.total_seconds()

659

* 1000), self.disable))

689

self.disable_initiator_tag = gobject.timeout_add(

690

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

660

691

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

661

692

662

693

def need_approval(self):

676

707

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

677

708

# should be.

678

709

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)

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

693

714

# Start a new checker if needed

694

715

if self.checker is None:

695

716

# Escape attributes for the shell

696

escaped_attrs = { attr:

697

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

698

for attr in self.runtime_expansions }

717

escaped_attrs = {

718

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

719

for attr in self.runtime_expansions }

699

720

try:

700

721

command = self.checker_command % escaped_attrs

701

722

except TypeError as error:

702

723

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

703

self.checker_command, exc_info=error)

704

return True # Try again later

724

self.checker_command,

725

exc_info=error)

726

return True # Try again later

705

727

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",

727

exc_info=error)

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)

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)

747

753

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

748

754

return True

749

755

761

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

756

762

return

757

763

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

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

764

self.checker.terminate()

766

765

self.checker = None

767

766

768

767

769

def dbus_service_property(dbus_interface, signature="v",

770

access="readwrite", byte_arrays=False):

768

def dbus_service_property(dbus_interface,

769

signature="v",

770

access="readwrite",

771

byte_arrays=False):

771

772

"""Decorators for marking methods of a DBusObjectWithProperties to

772

773

become properties on the D-Bus.

773

774

783

784

if byte_arrays and signature != "ay":

784

785

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

785

786

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

787

786

788

def decorator(func):

787

789

func._dbus_is_property = True

788

790

func._dbus_interface = dbus_interface

793

795

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

794

796

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

795

797

return func

798

796

799

return decorator

797

800

798

801

807

810

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

808

811

"false"}

809

812

"""

813

810

814

def decorator(func):

811

815

func._dbus_is_interface = True

812

816

func._dbus_interface = dbus_interface

813

817

func._dbus_name = dbus_interface

814

818

return func

819

815

820

return decorator

816

821

817

822

827

832

def Property_dbus_property(self):

828

833

return dbus.Boolean(False)

829

834

"""

835

830

836

def decorator(func):

831

837

func._dbus_annotations = annotations

832

838

return func

839

833

840

return decorator

834

841

835

842

838

845

"""

839

846

pass

840

847

848

841

849

class DBusPropertyAccessException(DBusPropertyException):

842

850

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

843

851

"""

871

879

def _get_all_dbus_things(self, thing):

872

880

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

873

881

"""

874

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

875

name),

882

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

876

883

athing.__get__(self))

877

884

for cls in self.__class__.__mro__

878

885

for name, athing in

879

inspect.getmembers(cls,

880

self._is_dbus_thing(thing)))

886

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

881

887

882

888

def _get_dbus_property(self, interface_name, property_name):

883

889

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

884

890

property with the specified name and interface.

885

891

"""

886

for cls in self.__class__.__mro__:

887

for name, value in (inspect.getmembers

888

(cls,

889

self._is_dbus_thing("property"))):

892

for cls in self.__class__.__mro__:

893

for name, value in inspect.getmembers(

894

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

890

895

if (value._dbus_name == property_name

891

896

and value._dbus_interface == interface_name):

892

897

return value.__get__(self)

893

898

894

899

# No such property

895

raise DBusPropertyNotFound(self.dbus_object_path + ":"

896

+ interface_name + "."

897

+ property_name)

900

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

901

self.dbus_object_path, interface_name, property_name))

898

902

899

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

903

@dbus.service.method(dbus.PROPERTIES_IFACE,

904

in_signature="ss",

900

905

out_signature="v")

901

906

def Get(self, interface_name, property_name):

902

907

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

927

932

for byte in value))

928

933

prop(value)

929

934

930

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

935

@dbus.service.method(dbus.PROPERTIES_IFACE,

936

in_signature="s",

931

937

out_signature="a{sv}")

932

938

def GetAll(self, interface_name):

933

939

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

948

954

if not hasattr(value, "variant_level"):

949

955

properties[name] = value

950

956

continue

951

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

952

value.variant_level+1)

957

properties[name] = type(value)(

958

value, variant_level = value.variant_level + 1)

953

959

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

954

960

955

961

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

973

979

connection)

974

980

try:

975

981

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

982

976

983

def make_tag(document, name, prop):

977

984

e = document.createElement("property")

978

985

e.setAttribute("name", name)

979

986

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

980

987

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

981

988

return e

989

982

990

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

983

991

# Add property tags

984

992

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

996

1004

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

997

1005

and prop._dbus_interface

998

1006

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

999

annots.update(getattr

1000

(prop,

1001

"_dbus_annotations",

1002

{}))

1007

annots.update(getattr(

1008

prop, "_dbus_annotations", {}))

1003

1009

for name, value in annots.items():

1004

1010

ann_tag = document.createElement(

1005

1011

"annotation")

1010

1016

for annotation, value in dict(

1011

1017

itertools.chain.from_iterable(

1012

1018

annotations().items()

1013

for name, annotations in

1014

self._get_all_dbus_things("interface")

1019

for name, annotations

1020

in self._get_all_dbus_things("interface")

1015

1021

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

1016

1022

)).items():

1017

1023

ann_tag = document.createElement("annotation")

1046

1052

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

1047

1053

if dt is None:

1048

1054

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

1049

return dbus.String(dt.isoformat(),

1050

variant_level=variant_level)

1055

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

1051

1056

1052

1057

1053

1058

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1073

1078

(from DBusObjectWithProperties) and interfaces (from the

1074

1079

dbus_interface_annotations decorator).

1075

1080

"""

1081

1076

1082

def wrapper(cls):

1077

1083

for orig_interface_name, alt_interface_name in (

1078

alt_interface_names.items()):

1084

alt_interface_names.items()):

1079

1085

attr = {}

1080

1086

interface_names = set()

1081

1087

# Go though all attributes of the class

1083

1089

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

1084

1090

# with the wrong interface name

1085

1091

if (not hasattr(attribute, "_dbus_interface")

1086

or not attribute._dbus_interface

1087

.startswith(orig_interface_name)):

1092

or not attribute._dbus_interface.startswith(

1093

orig_interface_name)):

1088

1094

continue

1089

1095

# Create an alternate D-Bus interface name based on

1090

1096

# the current name

1091

alt_interface = (attribute._dbus_interface

1092

.replace(orig_interface_name,

1093

alt_interface_name))

1097

alt_interface = attribute._dbus_interface.replace(

1098

orig_interface_name, alt_interface_name)

1094

1099

interface_names.add(alt_interface)

1095

1100

# Is this a D-Bus signal?

1096

1101

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

1097

# Extract the original non-method undecorated

1098

# function by black magic

1099

nonmethod_func = (dict(

1102

if sys.version_info.major == 2:

1103

# Extract the original non-method undecorated

1104

# function by black magic

1105

nonmethod_func = (dict(

1100

1106

zip(attribute.func_code.co_freevars,

1101

attribute.__closure__))["func"]

1102

.cell_contents)

1107

attribute.__closure__))

1108

["func"].cell_contents)

1109

else:

1110

nonmethod_func = attribute

1103

1111

# Create a new, but exactly alike, function

1104

1112

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

1105

1113

# with the alternate D-Bus interface name

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)))

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))

1115

1131

# Copy annotations, if any

1116

1132

try:

1117

new_function._dbus_annotations = (

1118

dict(attribute._dbus_annotations))

1133

new_function._dbus_annotations = dict(

1134

attribute._dbus_annotations)

1119

1135

except AttributeError:

1120

1136

pass

1121

1137

# Define a creator of a function to call both the

1126

1142

"""This function is a scope container to pass

1127

1143

func1 and func2 to the "call_both" function

1128

1144

outside of its arguments"""

1145

1129

1146

def call_both(*args, **kwargs):

1130

1147

"""This function will emit two D-Bus

1131

1148

signals by calling func1 and func2"""

1132

1149

func1(*args, **kwargs)

1133

1150

func2(*args, **kwargs)

1151

1134

1152

return call_both

1135

1153

# Create the "call_both" function and add it to

1136

1154

# the class

1141

1159

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

1142

1160

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

1143

1161

# to the class.

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)))

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)))

1154

1172

# Copy annotations, if any

1155

1173

try:

1156

attr[attrname]._dbus_annotations = (

1157

dict(attribute._dbus_annotations))

1174

attr[attrname]._dbus_annotations = dict(

1175

attribute._dbus_annotations)

1158

1176

except AttributeError:

1159

1177

pass

1160

1178

# Is this a D-Bus property?

1163

1181

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

1164

1182

# property with the alternate D-Bus interface

1165

1183

# name. Add it to the class.

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)))

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)))

1179

1195

# Copy annotations, if any

1180

1196

try:

1181

attr[attrname]._dbus_annotations = (

1182

dict(attribute._dbus_annotations))

1197

attr[attrname]._dbus_annotations = dict(

1198

attribute._dbus_annotations)

1183

1199

except AttributeError:

1184

1200

pass

1185

1201

# Is this a D-Bus interface?

1188

1204

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

1189

1205

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

1190

1206

# to the class.

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)))

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)))

1199

1214

if deprecate:

1200

1215

# Deprecate all alternate interfaces

1201

1216

iname="_AlternateDBusNames_interface_annotation{}"

1202

1217

for interface_name in interface_names:

1218

1203

1219

@dbus_interface_annotations(interface_name)

1204

1220

def func(self):

1205

1221

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

1206

"true" }

1222

"true" }

1207

1223

# Find an unused name

1208

1224

for aname in (iname.format(i)

1209

1225

for i in itertools.count()):

1214

1230

# Replace the class with a new subclass of it with

1215

1231

# methods, signals, etc. as created above.

1216

1232

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

1217

(cls,), attr)

1233

(cls, ), attr)

1218

1234

return cls

1235

1219

1236

return wrapper

1220

1237

1221

1238

1222

1239

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

1223

"se.bsnet.fukt.Mandos"})

1240

"se.bsnet.fukt.Mandos"})

1224

1241

class ClientDBus(Client, DBusObjectWithProperties):

1225

1242

"""A Client class using D-Bus

1226

1243

1230

1247

"""

1231

1248

1232

1249

runtime_expansions = (Client.runtime_expansions

1233

+ ("dbus_object_path",))

1250

+ ("dbus_object_path", ))

1234

1251

1235

1252

_interface = "se.recompile.Mandos.Client"

1236

1253

1244

1261

client_object_name = str(self.name).translate(

1245

1262

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

1246

1263

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

1247

self.dbus_object_path = (dbus.ObjectPath

1248

("/clients/" + client_object_name))

1264

self.dbus_object_path = dbus.ObjectPath(

1265

"/clients/" + client_object_name)

1249

1266

DBusObjectWithProperties.__init__(self, self.bus,

1250

1267

self.dbus_object_path)

1251

1268

1252

def notifychangeproperty(transform_func,

1253

dbus_name, type_func=lambda x: x,

1254

variant_level=1, invalidate_only=False,

1269

def notifychangeproperty(transform_func, dbus_name,

1270

type_func=lambda x: x,

1271

variant_level=1,

1272

invalidate_only=False,

1255

1273

_interface=_interface):

1256

1274

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

1257

1275

its changes to DBus.

1264

1282

variant_level: D-Bus variant level. Default: 1

1265

1283

"""

1266

1284

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

1285

1267

1286

def setter(self, value):

1268

1287

if hasattr(self, "dbus_object_path"):

1269

1288

if (not hasattr(self, attrname) or

1270

1289

type_func(getattr(self, attrname, None))

1271

1290

!= type_func(value)):

1272

1291

if invalidate_only:

1273

self.PropertiesChanged(_interface,

1274

dbus.Dictionary(),

1275

dbus.Array

1276

((dbus_name,)))

1292

self.PropertiesChanged(

1293

_interface, dbus.Dictionary(),

1294

dbus.Array((dbus_name, )))

1277

1295

else:

1278

dbus_value = transform_func(type_func(value),

1279

variant_level

1280

=variant_level)

1296

dbus_value = transform_func(

1297

type_func(value),

1298

variant_level = variant_level)

1281

1299

self.PropertyChanged(dbus.String(dbus_name),

1282

1300

dbus_value)

1283

self.PropertiesChanged(_interface,

1284

dbus.Dictionary({

1285

dbus.String(dbus_name):

1286

dbus_value }), dbus.Array())

1301

self.PropertiesChanged(

1302

_interface,

1303

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

1304

dbus_value }),

1305

dbus.Array())

1287

1306

setattr(self, attrname, value)

1288

1307

1289

1308

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

1295

1314

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

1296

1315

last_enabled = notifychangeproperty(datetime_to_dbus,

1297

1316

"LastEnabled")

1298

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

1299

type_func = lambda checker:

1300

checker is not None)

1317

checker = notifychangeproperty(

1318

dbus.Boolean, "CheckerRunning",

1319

type_func = lambda checker: checker is not None)

1301

1320

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1302

1321

"LastCheckedOK")

1303

1322

last_checker_status = notifychangeproperty(dbus.Int16,

1306

1325

datetime_to_dbus, "LastApprovalRequest")

1307

1326

approved_by_default = notifychangeproperty(dbus.Boolean,

1308

1327

"ApprovedByDefault")

1309

approval_delay = notifychangeproperty(dbus.UInt64,

1310

"ApprovalDelay",

1311

type_func =

1312

lambda td: td.total_seconds()

1313

* 1000)

1328

approval_delay = notifychangeproperty(

1329

dbus.UInt64, "ApprovalDelay",

1330

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

1314

1331

approval_duration = notifychangeproperty(

1315

1332

dbus.UInt64, "ApprovalDuration",

1316

1333

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

1317

1334

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

1318

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

1319

type_func = lambda td:

1320

td.total_seconds() * 1000)

1335

timeout = notifychangeproperty(

1336

dbus.UInt64, "Timeout",

1337

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

1321

1338

extended_timeout = notifychangeproperty(

1322

1339

dbus.UInt64, "ExtendedTimeout",

1323

1340

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)

1341

interval = notifychangeproperty(

1342

dbus.UInt64, "Interval",

1343

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

1329

1344

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

1330

1345

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

1331

1346

invalidate_only=True)

1341

1356

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

1342

1357

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

1343

1358

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)

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:

1350

1366

# Emit D-Bus signal

1351

1367

self.CheckerCompleted(dbus.Int16(exitstatus),

1352

dbus.Int64(condition),

1368

dbus.Int64(0),

1353

1369

dbus.String(command))

1354

1370

else:

1355

1371

# Emit D-Bus signal

1356

1372

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

1357

dbus.Int64(condition),

1373

dbus.Int64(

1374

self.last_checker_signal),

1358

1375

dbus.String(command))

1359

1360

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

1361

*args, **kwargs)

1376

return ret

1362

1377

1363

1378

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

1364

1379

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

1469

1484

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

1470

1485

1471

1486

# ApprovedByDefault - property

1472

@dbus_service_property(_interface, signature="b",

1487

@dbus_service_property(_interface,

1488

signature="b",

1473

1489

access="readwrite")

1474

1490

def ApprovedByDefault_dbus_property(self, value=None):

1475

1491

if value is None: # get

1477

1493

self.approved_by_default = bool(value)

1478

1494

1479

1495

# ApprovalDelay - property

1480

@dbus_service_property(_interface, signature="t",

1496

@dbus_service_property(_interface,

1497

signature="t",

1481

1498

access="readwrite")

1482

1499

def ApprovalDelay_dbus_property(self, value=None):

1483

1500

if value is None: # get

1486

1503

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

1487

1504

1488

1505

# ApprovalDuration - property

1489

@dbus_service_property(_interface, signature="t",

1506

@dbus_service_property(_interface,

1507

signature="t",

1490

1508

access="readwrite")

1491

1509

def ApprovalDuration_dbus_property(self, value=None):

1492

1510

if value is None: # get

1505

1523

return dbus.String(self.fingerprint)

1506

1524

1507

1525

# Host - property

1508

@dbus_service_property(_interface, signature="s",

1526

@dbus_service_property(_interface,

1527

signature="s",

1509

1528

access="readwrite")

1510

1529

def Host_dbus_property(self, value=None):

1511

1530

if value is None: # get

1523

1542

return datetime_to_dbus(self.last_enabled)

1524

1543

1525

1544

# Enabled - property

1526

@dbus_service_property(_interface, signature="b",

1545

@dbus_service_property(_interface,

1546

signature="b",

1527

1547

access="readwrite")

1528

1548

def Enabled_dbus_property(self, value=None):

1529

1549

if value is None: # get

1534

1554

self.disable()

1535

1555

1536

1556

# LastCheckedOK - property

1537

@dbus_service_property(_interface, signature="s",

1557

@dbus_service_property(_interface,

1558

signature="s",

1538

1559

access="readwrite")

1539

1560

def LastCheckedOK_dbus_property(self, value=None):

1540

1561

if value is not None:

1543

1564

return datetime_to_dbus(self.last_checked_ok)

1544

1565

1545

1566

# LastCheckerStatus - property

1546

@dbus_service_property(_interface, signature="n",

1547

access="read")

1567

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

1548

1568

def LastCheckerStatus_dbus_property(self):

1549

1569

return dbus.Int16(self.last_checker_status)

1550

1570

1559

1579

return datetime_to_dbus(self.last_approval_request)

1560

1580

1561

1581

# Timeout - property

1562

@dbus_service_property(_interface, signature="t",

1582

@dbus_service_property(_interface,

1583

signature="t",

1563

1584

access="readwrite")

1564

1585

def Timeout_dbus_property(self, value=None):

1565

1586

if value is None: # get

1578

1599

is None):

1579

1600

return

1580

1601

gobject.source_remove(self.disable_initiator_tag)

1581

self.disable_initiator_tag = (

1582

gobject.timeout_add(

1583

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

1584

* 1000), self.disable))

1602

self.disable_initiator_tag = gobject.timeout_add(

1603

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

1604

self.disable)

1585

1605

1586

1606

# ExtendedTimeout - property

1587

@dbus_service_property(_interface, signature="t",

1607

@dbus_service_property(_interface,

1608

signature="t",

1588

1609

access="readwrite")

1589

1610

def ExtendedTimeout_dbus_property(self, value=None):

1590

1611

if value is None: # get

1593

1614

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

1594

1615

1595

1616

# Interval - property

1596

@dbus_service_property(_interface, signature="t",

1617

@dbus_service_property(_interface,

1618

signature="t",

1597

1619

access="readwrite")

1598

1620

def Interval_dbus_property(self, value=None):

1599

1621

if value is None: # get

1604

1626

if self.enabled:

1605

1627

# Reschedule checker run

1606

1628

gobject.source_remove(self.checker_initiator_tag)

1607

self.checker_initiator_tag = (gobject.timeout_add

1608

(value, self.start_checker))

1609

self.start_checker() # Start one now, too

1629

self.checker_initiator_tag = gobject.timeout_add(

1630

value, self.start_checker)

1631

self.start_checker() # Start one now, too

1610

1632

1611

1633

# Checker - property

1612

@dbus_service_property(_interface, signature="s",

1634

@dbus_service_property(_interface,

1635

signature="s",

1613

1636

access="readwrite")

1614

1637

def Checker_dbus_property(self, value=None):

1615

1638

if value is None: # get

1617

1640

self.checker_command = str(value)

1618

1641

1619

1642

# CheckerRunning - property

1620

@dbus_service_property(_interface, signature="b",

1643

@dbus_service_property(_interface,

1644

signature="b",

1621

1645

access="readwrite")

1622

1646

def CheckerRunning_dbus_property(self, value=None):

1623

1647

if value is None: # get

1633

1657

return self.dbus_object_path # is already a dbus.ObjectPath

1634

1658

1635

1659

# Secret = property

1636

@dbus_service_property(_interface, signature="ay",

1637

access="write", byte_arrays=True)

1660

@dbus_service_property(_interface,

1661

signature="ay",

1662

access="write",

1663

byte_arrays=True)

1638

1664

def Secret_dbus_property(self, value):

1639

1665

self.secret = bytes(value)

1640

1666

1646

1672

self._pipe = child_pipe

1647

1673

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

1648

1674

if not self._pipe.recv():

1649

raise KeyError()

1675

raise KeyError(fpr)

1650

1676

1651

1677

def __getattribute__(self, name):

1652

1678

if name == '_pipe':

1656

1682

if data[0] == 'data':

1657

1683

return data[1]

1658

1684

if data[0] == 'function':

1685

1659

1686

def func(*args, **kwargs):

1660

1687

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

1661

1688

return self._pipe.recv()[1]

1689

1662

1690

return func

1663

1691

1664

1692

def __setattr__(self, name, value):

1680

1708

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

1681

1709

self.server.child_pipe.fileno())

1682

1710

1683

session = (gnutls.connection

1684

.ClientSession(self.request,

1685

gnutls.connection

1686

.X509Credentials()))

1711

session = gnutls.connection.ClientSession(

1712

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

1687

1713

1688

1714

# Note: gnutls.connection.X509Credentials is really a

1689

1715

# generic GnuTLS certificate credentials object so long as

1698

1724

priority = self.server.gnutls_priority

1699

1725

if priority is None:

1700

1726

priority = "NORMAL"

1701

(gnutls.library.functions

1702

.gnutls_priority_set_direct(session._c_object,

1703

priority, None))

1727

gnutls.library.functions.gnutls_priority_set_direct(

1728

session._c_object, priority, None)

1704

1729

1705

1730

# Start communication using the Mandos protocol

1706

1731

# Get protocol number

1726

1751

approval_required = False

1727

1752

try:

1728

1753

try:

1729

fpr = self.fingerprint(self.peer_certificate

1730

(session))

1754

fpr = self.fingerprint(

1755

self.peer_certificate(session))

1731

1756

except (TypeError,

1732

1757

gnutls.errors.GNUTLSError) as error:

1733

1758

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

1748

1773

while True:

1749

1774

if not client.enabled:

1750

1775

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

1751

client.name)

1776

client.name)

1752

1777

if self.server.use_dbus:

1753

1778

# Emit D-Bus signal

1754

1779

client.Rejected("Disabled")

1801

1826

logger.warning("gnutls send failed",

1802

1827

exc_info=error)

1803

1828

return

1804

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

1805

sent, len(client.secret)

1806

- (sent_size + sent))

1829

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

1830

len(client.secret) - (sent_size

1831

+ sent))

1807

1832

sent_size += sent

1808

1833

1809

1834

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

1826

1851

def peer_certificate(session):

1827

1852

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

1828

1853

# If not an OpenPGP certificate...

1829

if (gnutls.library.functions

1830

.gnutls_certificate_type_get(session._c_object)

1854

if (gnutls.library.functions.gnutls_certificate_type_get(

1855

session._c_object)

1831

1856

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1832

1857

# ...do the normal thing

1833

1858

return session.peer_certificate

1847

1872

def fingerprint(openpgp):

1848

1873

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1849

1874

# New GnuTLS "datum" with the OpenPGP public key

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))))

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)))

1855

1879

# New empty GnuTLS certificate

1856

1880

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1857

(gnutls.library.functions

1858

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

1881

gnutls.library.functions.gnutls_openpgp_crt_init(

1882

ctypes.byref(crt))

1859

1883

# Import the OpenPGP public key into the certificate

1860

(gnutls.library.functions

1861

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

1862

gnutls.library.constants

1863

.GNUTLS_OPENPGP_FMT_RAW))

1884

gnutls.library.functions.gnutls_openpgp_crt_import(

1885

crt, ctypes.byref(datum),

1886

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

1864

1887

# Verify the self signature in the key

1865

1888

crtverify = ctypes.c_uint()

1866

(gnutls.library.functions

1867

.gnutls_openpgp_crt_verify_self(crt, 0,

1868

ctypes.byref(crtverify)))

1889

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1890

crt, 0, ctypes.byref(crtverify))

1869

1891

if crtverify.value != 0:

1870

1892

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1871

raise (gnutls.errors.CertificateSecurityError

1872

("Verify failed"))

1893

raise gnutls.errors.CertificateSecurityError(

1894

"Verify failed")

1873

1895

# New buffer for the fingerprint

1874

1896

buf = ctypes.create_string_buffer(20)

1875

1897

buf_len = ctypes.c_size_t()

1876

1898

# Get the fingerprint from the certificate into the buffer

1877

(gnutls.library.functions

1878

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

1879

ctypes.byref(buf_len)))

1899

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1900

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

1880

1901

# Deinit the certificate

1881

1902

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1882

1903

# Convert the buffer to a Python bytestring

1888

1909

1889

1910

class MultiprocessingMixIn(object):

1890

1911

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

1912

1891

1913

def sub_process_main(self, request, address):

1892

1914

try:

1893

1915

self.finish_request(request, address)

1905

1927

1906

1928

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1907

1929

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

1930

1908

1931

def process_request(self, request, client_address):

1909

1932

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

1910

1933

1931

1954

interface: None or a network interface name (string)

1932

1955

use_ipv6: Boolean; to use IPv6 or not

1933

1956

"""

1957

1934

1958

def __init__(self, server_address, RequestHandlerClass,

1935

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

1959

interface=None,

1960

use_ipv6=True,

1961

socketfd=None):

1936

1962

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

1937

1963

creating a new one with socket.socket().

1938

1964

"""

1979

2005

self.interface)

1980

2006

else:

1981

2007

try:

1982

self.socket.setsockopt(socket.SOL_SOCKET,

1983

SO_BINDTODEVICE,

1984

(self.interface + "\0")

1985

.encode("utf-8"))

2008

self.socket.setsockopt(

2009

socket.SOL_SOCKET, SO_BINDTODEVICE,

2010

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

1986

2011

except socket.error as error:

1987

2012

if error.errno == errno.EPERM:

1988

2013

logger.error("No permission to bind to"

2006

2031

self.server_address = (any_address,

2007

2032

self.server_address[1])

2008

2033

elif not self.server_address[1]:

2009

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

2010

0)

2034

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

2011

2035

# if self.interface:

2012

2036

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

2013

2037

# 0, # port

2027

2051

2028

2052

Assumes a gobject.MainLoop event loop.

2029

2053

"""

2054

2030

2055

def __init__(self, server_address, RequestHandlerClass,

2031

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

2032

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

2056

interface=None,

2057

use_ipv6=True,

2058

clients=None,

2059

gnutls_priority=None,

2060

use_dbus=True,

2061

socketfd=None):

2033

2062

self.enabled = False

2034

2063

self.clients = clients

2035

2064

if self.clients is None:

2041

2070

interface = interface,

2042

2071

use_ipv6 = use_ipv6,

2043

2072

socketfd = socketfd)

2073

2044

2074

def server_activate(self):

2045

2075

if self.enabled:

2046

2076

return socketserver.TCPServer.server_activate(self)

2050

2080

2051

2081

def add_pipe(self, parent_pipe, proc):

2052

2082

# Call "handle_ipc" for both data and EOF events

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))

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))

2059

2089

2060

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

2061

proc = None, client_object=None):

2090

def handle_ipc(self, source, condition,

2091

parent_pipe=None,

2092

proc = None,

2093

client_object=None):

2062

2094

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

2063

2095

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

2064

2096

# Wait for other process to exit

2087

2119

parent_pipe.send(False)

2088

2120

return False

2089

2121

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))

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))

2098

2129

parent_pipe.send(True)

2099

2130

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

2100

2131

# same fileno

2106

2137

2107

2138

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

2108

2139

funcname)(*args,

2109

**kwargs)))

2140

**kwargs)))

2110

2141

2111

2142

if command == 'getattr':

2112

2143

attrname = request[1]

2113

if callable(client_object.__getattribute__(attrname)):

2114

parent_pipe.send(('function',))

2144

if isinstance(client_object.__getattribute__(attrname),

2145

collections.Callable):

2146

parent_pipe.send(('function', ))

2115

2147

else:

2116

parent_pipe.send(('data', client_object

2117

.__getattribute__(attrname)))

2148

parent_pipe.send((

2149

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

2118

2150

2119

2151

if command == 'setattr':

2120

2152

attrname = request[1]

2151

2183

# avoid excessive use of external libraries.

2152

2184

2153

2185

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

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

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

2163

2191

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

2164

2192

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

2165

2193

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

2166

2194

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

2167

2195

datetime.timedelta(seconds=1),

2168

frozenset((token_end,)))

2196

frozenset((token_end, )))

2169

2197

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

2170

2198

datetime.timedelta(minutes=1),

2171

2199

frozenset((token_second, token_end)))

2187

2215

frozenset((token_month, token_end)))

2188

2216

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

2189

2217

datetime.timedelta(weeks=1),

2190

frozenset((token_end,)))

2218

frozenset((token_end, )))

2191

2219

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

2192

2220

frozenset((token_year, token_month,

2193

2221

token_day, token_time,

2195

2223

# Define starting values

2196

2224

value = datetime.timedelta() # Value so far

2197

2225

found_token = None

2198

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

2226

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

2199

2227

s = duration # String left to parse

2200

2228

# Loop until end token is found

2201

2229

while found_token is not token_end:

2218

2246

break

2219

2247

else:

2220

2248

# No currently valid tokens were found

2221

raise ValueError("Invalid RFC 3339 duration")

2249

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

2250

.format(duration))

2222

2251

# End token found

2223

2252

return value

2224

2253

2261

2290

elif suffix == "w":

2262

2291

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

2263

2292

else:

2264

raise ValueError("Unknown suffix {!r}"

2265

.format(suffix))

2293

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

2266

2294

except IndexError as e:

2267

2295

raise ValueError(*(e.args))

2268

2296

timevalue += delta

2284

2312

# Close all standard open file descriptors

2285

2313

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

2286

2314

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

2287

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

2315

raise OSError(errno.ENODEV,

2316

"{} not a character device"

2288

2317

.format(os.devnull))

2289

2318

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

2290

2319

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

2356

2385

"port": "",

2357

2386

"debug": "False",

2358

2387

"priority":

2359

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

2388

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

2389

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

2360

2390

"servicename": "Mandos",

2361

2391

"use_dbus": "True",

2362

2392

"use_ipv6": "True",

2366

2396

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

2367

2397

"foreground": "False",

2368

2398

"zeroconf": "True",

2369

}

2399

}

2370

2400

2371

2401

# Parse config file for server-global settings

2372

2402

server_config = configparser.SafeConfigParser(server_defaults)

2373

2403

del server_defaults

2374

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

2375

"mandos.conf"))

2404

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

2376

2405

# Convert the SafeConfigParser object to a dict

2377

2406

server_settings = server_config.defaults()

2378

2407

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

2396

2425

# Override the settings from the config file with command line

2397

2426

# options, if set.

2398

2427

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

2399

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

2400

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

2401

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

2428

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

2429

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

2430

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

2402

2431

value = getattr(options, option)

2403

2432

if value is not None:

2404

2433

server_settings[option] = value

2419

2448

2420

2449

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

2421

2450

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")

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")

2427

2455

2428

2456

# For convenience

2429

2457

debug = server_settings["debug"]

2445

2473

initlogger(debug, level)

2446

2474

2447

2475

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

2448

syslogger.setFormatter(logging.Formatter

2449

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

2450

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

2451

.format(server_settings

2452

["servicename"])))

2476

syslogger.setFormatter(

2477

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

2478

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

2479

server_settings["servicename"])))

2453

2480

2454

2481

# Parse config file with clients

2455

2482

client_config = configparser.SafeConfigParser(Client

2463

2490

socketfd = None

2464

2491

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

2465

2492

socketfd = server_settings["socket"]

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)

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)

2476

2501

if not foreground:

2477

2502

pidfilename = "/run/mandos.pid"

2478

2503

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

2479

2504

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

2480

2505

pidfile = None

2481

2506

try:

2482

pidfile = open(pidfilename, "w")

2507

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

2483

2508

except IOError as e:

2484

2509

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

2485

2510

exc_info=e)

2512

2537

def debug_gnutls(level, string):

2513

2538

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

2514

2539

2515

(gnutls.library.functions

2516

.gnutls_global_set_log_function(debug_gnutls))

2540

gnutls.library.functions.gnutls_global_set_log_function(

2541

debug_gnutls)

2517

2542

2518

2543

# Redirect stdin so all checkers get /dev/null

2519

2544

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

2539

2564

if use_dbus:

2540

2565

try:

2541

2566

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

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:

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:

2547

2573

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

2548

2574

use_dbus = False

2549

2575

server_settings["use_dbus"] = False

2550

2576

tcp_server.use_dbus = False

2551

2577

if zeroconf:

2552

2578

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2553

service = AvahiServiceToSyslog(name =

2554

server_settings["servicename"],

2555

servicetype = "_mandos._tcp",

2556

protocol = protocol, bus = bus)

2579

service = AvahiServiceToSyslog(

2580

name = server_settings["servicename"],

2581

servicetype = "_mandos._tcp",

2582

protocol = protocol,

2583

bus = bus)

2557

2584

if server_settings["interface"]:

2558

service.interface = (if_nametoindex

2559

(server_settings["interface"]

2560

.encode("utf-8")))

2585

service.interface = if_nametoindex(

2586

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

2561

2587

2562

2588

global multiprocessing_manager

2563

2589

multiprocessing_manager = multiprocessing.Manager()

2582

2608

if server_settings["restore"]:

2583

2609

try:

2584

2610

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

2585

clients_data, old_client_settings = (pickle.load

2586

(stored_state))

2611

clients_data, old_client_settings = pickle.load(

2612

stored_state)

2587

2613

os.remove(stored_state_path)

2588

2614

except IOError as e:

2589

2615

if e.errno == errno.ENOENT:

2590

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

2591

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

2616

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

2617

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

2592

2618

else:

2593

2619

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

2594

2620

exc_info=e)

2595

2621

raise

2596

2622

except EOFError as e:

2597

2623

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

2598

"EOFError:", exc_info=e)

2624

"EOFError:",

2625

exc_info=e)

2599

2626

2600

2627

with PGPEngine() as pgp:

2601

2628

for client_name, client in clients_data.items():

2613

2640

# For each value in new config, check if it

2614

2641

# differs from the old config value (Except for

2615

2642

# the "secret" attribute)

2616

if (name != "secret" and

2617

value != old_client_settings[client_name]

2618

[name]):

2643

if (name != "secret"

2644

and (value !=

2645

old_client_settings[client_name][name])):

2619

2646

client[name] = value

2620

2647

except KeyError:

2621

2648

pass

2622

2649

2623

2650

# Clients who has passed its expire date can still be

2624

# enabled if its last checker was successful. Clients

2651

# enabled if its last checker was successful. A Client

2625

2652

# whose checker succeeded before we stored its state is

2626

2653

# assumed to have successfully run all checkers during

2627

2654

# downtime.

2630

2657

if not client["last_checked_ok"]:

2631

2658

logger.warning(

2632

2659

"disabling client {} - Client never "

2633

"performed a successful checker"

2634

.format(client_name))

2660

"performed a successful checker".format(

2661

client_name))

2635

2662

client["enabled"] = False

2636

2663

elif client["last_checker_status"] != 0:

2637

2664

logger.warning(

2638

2665

"disabling client {} - Client last"

2639

" checker failed with error code {}"

2640

.format(client_name,

2641

client["last_checker_status"]))

2666

" checker failed with error code"

2667

" {}".format(

2668

client_name,

2669

client["last_checker_status"]))

2642

2670

client["enabled"] = False

2643

2671

else:

2644

client["expires"] = (datetime.datetime

2645

.utcnow()

2646

+ client["timeout"])

2672

client["expires"] = (

2673

datetime.datetime.utcnow()

2674

+ client["timeout"])

2647

2675

logger.debug("Last checker succeeded,"

2648

" keeping {} enabled"

2649

.format(client_name))

2676

" keeping {} enabled".format(

2677

client_name))

2650

2678

try:

2651

client["secret"] = (

2652

pgp.decrypt(client["encrypted_secret"],

2653

client_settings[client_name]

2654

["secret"]))

2679

client["secret"] = pgp.decrypt(

2680

client["encrypted_secret"],

2681

client_settings[client_name]["secret"])

2655

2682

except PGPError:

2656

2683

# If decryption fails, we use secret from new settings

2657

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

2658

.format(client_name))

2659

client["secret"] = (

2660

client_settings[client_name]["secret"])

2684

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

2685

client_name))

2686

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

2687

["secret"])

2661

2688

2662

2689

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

2663

2690

for client_name in (set(old_client_settings)

2670

2697

# Create all client objects

2671

2698

for client_name, client in clients_data.items():

2672

2699

tcp_server.clients[client_name] = client_class(

2673

name = client_name, settings = client,

2700

name = client_name,

2701

settings = client,

2674

2702

server_settings = server_settings)

2675

2703

2676

2704

if not tcp_server.clients:

2678

2706

2679

2707

if not foreground:

2680

2708

if pidfile is not None:

2709

pid = os.getpid()

2681

2710

try:

2682

2711

with pidfile:

2683

pid = os.getpid()

2684

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

2712

print(pid, file=pidfile)

2685

2713

except IOError:

2686

2714

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

2687

2715

pidfilename, pid)

2692

2720

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

2693

2721

2694

2722

if use_dbus:

2695

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

2696

"se.bsnet.fukt.Mandos"})

2723

2724

@alternate_dbus_interfaces(

2725

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

2697

2726

class MandosDBusService(DBusObjectWithProperties):

2698

2727

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

2728

2699

2729

def __init__(self):

2700

2730

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

2731

2701

2732

_interface = "se.recompile.Mandos"

2702

2733

2703

2734

@dbus_interface_annotations(_interface)

2704

2735

def _foo(self):

2705

return { "org.freedesktop.DBus.Property"

2706

".EmitsChangedSignal":

2707

"false"}

2736

return {

2737

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

2738

"false" }

2708

2739

2709

2740

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

2710

2741

def ClientAdded(self, objpath):

2724

2755

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

2725

2756

def GetAllClients(self):

2726

2757

"D-Bus method"

2727

return dbus.Array(c.dbus_object_path

2728

for c in

2758

return dbus.Array(c.dbus_object_path for c in

2729

2759

tcp_server.clients.itervalues())

2730

2760

2731

2761

@dbus.service.method(_interface,

2780

2810

# + secret.

2781

2811

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

2782

2812

"checker", "server_settings" }

2783

for name, typ in (inspect.getmembers

2784

(dbus.service.Object)):

2813

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

2814

.Object):

2785

2815

exclude.add(name)

2786

2816

2787

2817

client_dict["encrypted_secret"] = (client

2794

2824

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

2795

2825

2796

2826

try:

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:

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:

2801

2833

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

2802

tempname=stored_state.name

2834

tempname = stored_state.name

2803

2835

os.rename(tempname, stored_state_path)

2804

2836

except (IOError, OSError) as e:

2805

2837

if not debug:

2824

2856

client.disable(quiet=True)

2825

2857

if use_dbus:

2826

2858

# Emit D-Bus signal

2827

mandos_dbus_service.ClientRemoved(client

2828

.dbus_object_path,

2829

client.name)

2859

mandos_dbus_service.ClientRemoved(

2860

client.dbus_object_path, client.name)

2830

2861

client_settings.clear()

2831

2862

2832

2863

atexit.register(cleanup)

2885

2916

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

2886

2917

cleanup()

2887

2918

2919

2888

2920

if __name__ == '__main__':

2889

2921

main()