/mandos/trunk : revision 744

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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

426

408

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456

"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",

487

}

459

client_defaults = { "timeout": "PT5M",

460

"extended_timeout": "PT15M",

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"interval": "PT2M",

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

463

"host": "",

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"approval_delay": "PT0S",

465

"approval_duration": "PT1S",

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"approved_by_default": "True",

467

"enabled": "True",

468

}

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@staticmethod

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471

def config_parser(config):

568

549

self.current_checker_command = None

569

550

self.approved = None

570

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self.approvals_pending = 0

571

self.changedstate = multiprocessing_manager.Condition(

572

multiprocessing_manager.Lock())

573

self.client_structure = [attr

574

for attr in self.__dict__.iterkeys()

552

self.changedstate = (multiprocessing_manager

553

.Condition(multiprocessing_manager

554

.Lock()))

555

self.client_structure = [attr for attr in

556

self.__dict__.iterkeys()

575

557

if not attr.startswith("_")]

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558

self.client_structure.append("client_structure")

577

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578

for name, t in inspect.getmembers(

579

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

560

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

561

lambda obj:

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isinstance(obj,

563

property)):

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if not name.startswith("_"):

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self.client_structure.append(name)

582

566

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608

# 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)

627

self.checker_initiator_tag = gobject.timeout_add(

628

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)

633

self.disable_initiator_tag = gobject.timeout_add(

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

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self.disable_initiator_tag = (gobject.timeout_add

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(int(self.timeout

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.total_seconds() * 1000),

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self.disable))

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# Also start a new checker *right now*.

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623

self.start_checker()

637

624

646

633

vars(self))

647

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self.checked_ok()

648

635

else:

649

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

636

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

637

vars(self))

650

638

else:

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self.last_checker_status = -1

652

640

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

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654

gobject.source_remove(self.disable_initiator_tag)

667

655

self.disable_initiator_tag = None

668

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

669

self.disable_initiator_tag = gobject.timeout_add(

670

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

657

self.disable_initiator_tag = (gobject.timeout_add

658

(int(timeout.total_seconds()

659

* 1000), self.disable))

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660

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

672

661

673

662

def need_approval(self):

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693

# Start a new checker if needed

705

694

if self.checker is None:

706

695

# Escape attributes for the shell

707

escaped_attrs = {

708

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

709

for attr in self.runtime_expansions }

696

escaped_attrs = { attr:

697

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

698

for attr in self.runtime_expansions }

710

699

try:

711

700

command = self.checker_command % escaped_attrs

712

701

except TypeError as error:

713

702

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

714

self.checker_command,

715

exc_info=error)

716

return True # Try again later

703

self.checker_command, exc_info=error)

704

return True # Try again later

717

705

self.current_checker_command = command

718

706

try:

719

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

720

self.name)

707

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

708

command, self.name)

721

709

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

722

710

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

723

711

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

732

720

"stderr": wnull })

733

721

self.checker = subprocess.Popen(command,

734

722

close_fds=True,

735

shell=True,

736

cwd="/",

723

shell=True, cwd="/",

737

724

**popen_args)

738

725

except OSError as error:

739

726

logger.error("Failed to start subprocess",

740

727

exc_info=error)

741

728

return True

742

self.checker_callback_tag = gobject.child_watch_add(

743

self.checker.pid, self.checker_callback, data=command)

729

self.checker_callback_tag = (gobject.child_watch_add

730

(self.checker.pid,

731

self.checker_callback,

732

data=command))

744

733

# The checker may have completed before the gobject

745

734

# watch was added. Check for this.

746

735

try:

777

766

self.checker = None

778

767

779

768

780

def dbus_service_property(dbus_interface,

781

signature="v",

782

access="readwrite",

783

byte_arrays=False):

769

def dbus_service_property(dbus_interface, signature="v",

770

access="readwrite", byte_arrays=False):

784

771

"""Decorators for marking methods of a DBusObjectWithProperties to

785

772

become properties on the D-Bus.

786

773

796

783

if byte_arrays and signature != "ay":

797

784

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

798

785

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

799

800

786

def decorator(func):

801

787

func._dbus_is_property = True

802

788

func._dbus_interface = dbus_interface

807

793

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

808

794

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

809

795

return func

810

811

796

return decorator

812

797

813

798

822

807

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

823

808

"false"}

824

809

"""

825

826

810

def decorator(func):

827

811

func._dbus_is_interface = True

828

812

func._dbus_interface = dbus_interface

829

813

func._dbus_name = dbus_interface

830

814

return func

831

832

815

return decorator

833

816

834

817

844

827

def Property_dbus_property(self):

845

828

return dbus.Boolean(False)

846

829

"""

847

848

830

def decorator(func):

849

831

func._dbus_annotations = annotations

850

832

return func

851

852

833

return decorator

853

834

854

835

857

838

"""

858

839

pass

859

840

860

861

841

class DBusPropertyAccessException(DBusPropertyException):

862

842

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

863

843

"""

891

871

def _get_all_dbus_things(self, thing):

892

872

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

893

873

"""

894

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

874

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

875

name),

895

876

athing.__get__(self))

896

877

for cls in self.__class__.__mro__

897

878

for name, athing in

898

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

879

inspect.getmembers(cls,

880

self._is_dbus_thing(thing)))

899

881

900

882

def _get_dbus_property(self, interface_name, property_name):

901

883

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

902

884

property with the specified name and interface.

903

885

"""

904

for cls in self.__class__.__mro__:

905

for name, value in inspect.getmembers(

906

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"))):

907

890

if (value._dbus_name == property_name

908

891

and value._dbus_interface == interface_name):

909

892

return value.__get__(self)

910

893

911

894

# No such property

912

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

913

self.dbus_object_path, interface_name, property_name))

895

raise DBusPropertyNotFound(self.dbus_object_path + ":"

896

+ interface_name + "."

897

+ property_name)

914

898

915

@dbus.service.method(dbus.PROPERTIES_IFACE,

916

in_signature="ss",

899

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

917

900

out_signature="v")

918

901

def Get(self, interface_name, property_name):

919

902

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

944

927

for byte in value))

945

928

prop(value)

946

929

947

@dbus.service.method(dbus.PROPERTIES_IFACE,

948

in_signature="s",

930

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

949

931

out_signature="a{sv}")

950

932

def GetAll(self, interface_name):

951

933

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

966

948

if not hasattr(value, "variant_level"):

967

949

properties[name] = value

968

950

continue

969

properties[name] = type(value)(

970

value, variant_level = value.variant_level + 1)

951

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

952

value.variant_level+1)

971

953

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

972

954

973

955

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

991

973

connection)

992

974

try:

993

975

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

994

995

976

def make_tag(document, name, prop):

996

977

e = document.createElement("property")

997

978

e.setAttribute("name", name)

998

979

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

999

980

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

1000

981

return e

1001

1002

982

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

1003

983

# Add property tags

1004

984

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

1016

996

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

1017

997

and prop._dbus_interface

1018

998

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

1019

annots.update(getattr(

1020

prop, "_dbus_annotations", {}))

999

annots.update(getattr

1000

(prop,

1001

"_dbus_annotations",

1002

{}))

1021

1003

for name, value in annots.items():

1022

1004

ann_tag = document.createElement(

1023

1005

"annotation")

1028

1010

for annotation, value in dict(

1029

1011

itertools.chain.from_iterable(

1030

1012

annotations().items()

1031

for name, annotations

1032

in self._get_all_dbus_things("interface")

1013

for name, annotations in

1014

self._get_all_dbus_things("interface")

1033

1015

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

1034

1016

)).items():

1035

1017

ann_tag = document.createElement("annotation")

1064

1046

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

1065

1047

if dt is None:

1066

1048

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

1067

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

1049

return dbus.String(dt.isoformat(),

1050

variant_level=variant_level)

1068

1051

1069

1052

1070

1053

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1090

1073

(from DBusObjectWithProperties) and interfaces (from the

1091

1074

dbus_interface_annotations decorator).

1092

1075

"""

1093

1094

1076

def wrapper(cls):

1095

1077

for orig_interface_name, alt_interface_name in (

1096

alt_interface_names.items()):

1078

alt_interface_names.items()):

1097

1079

attr = {}

1098

1080

interface_names = set()

1099

1081

# Go though all attributes of the class

1101

1083

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

1102

1084

# with the wrong interface name

1103

1085

if (not hasattr(attribute, "_dbus_interface")

1104

or not attribute._dbus_interface.startswith(

1105

orig_interface_name)):

1086

or not attribute._dbus_interface

1087

.startswith(orig_interface_name)):

1106

1088

continue

1107

1089

# Create an alternate D-Bus interface name based on

1108

1090

# the current name

1109

alt_interface = attribute._dbus_interface.replace(

1110

orig_interface_name, alt_interface_name)

1091

alt_interface = (attribute._dbus_interface

1092

.replace(orig_interface_name,

1093

alt_interface_name))

1111

1094

interface_names.add(alt_interface)

1112

1095

# Is this a D-Bus signal?

1113

1096

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

1114

1097

# Extract the original non-method undecorated

1115

1098

# function by black magic

1116

1099

nonmethod_func = (dict(

1117

zip(attribute.func_code.co_freevars,

1118

attribute.__closure__))

1119

["func"].cell_contents)

1100

zip(attribute.func_code.co_freevars,

1101

attribute.__closure__))["func"]

1102

.cell_contents)

1120

1103

# Create a new, but exactly alike, function

1121

1104

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

1122

1105

# with the alternate D-Bus interface name

1123

new_function = (dbus.service.signal(

1124

alt_interface, attribute._dbus_signature)

1106

new_function = (dbus.service.signal

1107

(alt_interface,

1108

attribute._dbus_signature)

1125

1109

(types.FunctionType(

1126

nonmethod_func.func_code,

1127

nonmethod_func.func_globals,

1128

nonmethod_func.func_name,

1129

nonmethod_func.func_defaults,

1130

nonmethod_func.func_closure)))

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)

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

2113

if callable(client_object.__getattribute__(attrname)):

2145

parent_pipe.send(('function', ))

2114

parent_pipe.send(('function',))

2146

2115

else:

2147

parent_pipe.send((

2148

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

2116

parent_pipe.send(('data', client_object

2117

.__getattribute__(attrname)))

2149

2118

2150

2119

if command == 'setattr':

2151

2120

attrname = request[1]

2182

2151

# avoid excessive use of external libraries.

2183

2152

2184

2153

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

2185

Token = collections.namedtuple("Token", (

2186

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

2187

# a "group" containing digits

2188

"value", # datetime.timedelta or None

2189

"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

2190

2163

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

2191

2164

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

2192

2165

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

2193

2166

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

2194

2167

datetime.timedelta(seconds=1),

2195

frozenset((token_end, )))

2168

frozenset((token_end,)))

2196

2169

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

2197

2170

datetime.timedelta(minutes=1),

2198

2171

frozenset((token_second, token_end)))

2214

2187

frozenset((token_month, token_end)))

2215

2188

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

2216

2189

datetime.timedelta(weeks=1),

2217

frozenset((token_end, )))

2190

frozenset((token_end,)))

2218

2191

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

2219

2192

frozenset((token_year, token_month,

2220

2193

token_day, token_time,

2222

2195

# Define starting values

2223

2196

value = datetime.timedelta() # Value so far

2224

2197

found_token = None

2225

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

2198

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

2226

2199

s = duration # String left to parse

2227

2200

# Loop until end token is found

2228

2201

while found_token is not token_end:

2245

2218

break

2246

2219

else:

2247

2220

# No currently valid tokens were found

2248

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

2249

.format(duration))

2221

raise ValueError("Invalid RFC 3339 duration")

2250

2222

# End token found

2251

2223

return value

2252

2224

2289

2261

elif suffix == "w":

2290

2262

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

2291

2263

else:

2292

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

2264

raise ValueError("Unknown suffix {!r}"

2265

.format(suffix))

2293

2266

except IndexError as e:

2294

2267

raise ValueError(*(e.args))

2295

2268

timevalue += delta

2311

2284

# Close all standard open file descriptors

2312

2285

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

2313

2286

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

2314

raise OSError(errno.ENODEV,

2315

"{} not a character device"

2287

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

2316

2288

.format(os.devnull))

2317

2289

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

2318

2290

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

2395

2367

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

2396

2368

"foreground": "False",

2397

2369

"zeroconf": "True",

2398

}

2370

}

2399

2371

2400

2372

# Parse config file for server-global settings

2401

2373

server_config = configparser.SafeConfigParser(server_defaults)

2402

2374

del server_defaults

2403

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

2375

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

2376

"mandos.conf"))

2404

2377

# Convert the SafeConfigParser object to a dict

2405

2378

server_settings = server_config.defaults()

2406

2379

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

2424

2397

# Override the settings from the config file with command line

2425

2398

# options, if set.

2426

2399

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

2427

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

2428

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

2429

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

2400

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

2401

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

2402

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

2430

2403

value = getattr(options, option)

2431

2404

if value is not None:

2432

2405

server_settings[option] = value

2447

2420

2448

2421

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

2449

2422

2450

if (not server_settings["zeroconf"]

2451

and not (server_settings["port"]

2452

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

2453

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

2423

if (not server_settings["zeroconf"] and

2424

not (server_settings["port"]

2425

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

2426

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

2427

" Zeroconf")

2454

2428

2455

2429

# For convenience

2456

2430

debug = server_settings["debug"]

2472

2446

initlogger(debug, level)

2473

2447

2474

2448

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

2475

syslogger.setFormatter(

2476

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

2477

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

2478

server_settings["servicename"])))

2449

syslogger.setFormatter(logging.Formatter

2450

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

2451

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

2452

.format(server_settings

2453

["servicename"])))

2479

2454

2480

2455

# Parse config file with clients

2481

2456

client_config = configparser.SafeConfigParser(Client

2489

2464

socketfd = None

2490

2465

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

2491

2466

socketfd = server_settings["socket"]

2492

tcp_server = MandosServer(

2493

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

2494

ClientHandler,

2495

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

2496

use_ipv6=use_ipv6,

2497

gnutls_priority=server_settings["priority"],

2498

use_dbus=use_dbus,

2499

socketfd=socketfd)

2467

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

2468

server_settings["port"]),

2469

ClientHandler,

2470

interface=(server_settings["interface"]

2471

or None),

2472

use_ipv6=use_ipv6,

2473

gnutls_priority=

2474

server_settings["priority"],

2475

use_dbus=use_dbus,

2476

socketfd=socketfd)

2500

2477

if not foreground:

2501

2478

pidfilename = "/run/mandos.pid"

2502

2479

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

2503

2480

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

2504

2481

pidfile = None

2505

2482

try:

2506

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

2483

pidfile = open(pidfilename, "w")

2507

2484

except IOError as e:

2508

2485

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

2509

2486

exc_info=e)

2536

2513

def debug_gnutls(level, string):

2537

2514

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

2538

2515

2539

gnutls.library.functions.gnutls_global_set_log_function(

2540

debug_gnutls)

2516

(gnutls.library.functions

2517

.gnutls_global_set_log_function(debug_gnutls))

2541

2518

2542

2519

# Redirect stdin so all checkers get /dev/null

2543

2520

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

2563

2540

if use_dbus:

2564

2541

try:

2565

2542

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

2566

bus,

2567

do_not_queue=True)

2568

old_bus_name = dbus.service.BusName(

2569

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

2570

do_not_queue=True)

2571

except dbus.exceptions.DBusException as e:

2543

bus, do_not_queue=True)

2544

old_bus_name = (dbus.service.BusName

2545

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

2546

do_not_queue=True))

2547

except dbus.exceptions.NameExistsException as e:

2572

2548

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

2573

2549

use_dbus = False

2574

2550

server_settings["use_dbus"] = False

2575

2551

tcp_server.use_dbus = False

2576

2552

if zeroconf:

2577

2553

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2578

service = AvahiServiceToSyslog(

2579

name = server_settings["servicename"],

2580

servicetype = "_mandos._tcp",

2581

protocol = protocol,

2582

bus = bus)

2554

service = AvahiServiceToSyslog(name =

2555

server_settings["servicename"],

2556

servicetype = "_mandos._tcp",

2557

protocol = protocol, bus = bus)

2583

2558

if server_settings["interface"]:

2584

service.interface = if_nametoindex(

2585

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

2559

service.interface = (if_nametoindex

2560

(server_settings["interface"]

2561

.encode("utf-8")))

2586

2562

2587

2563

global multiprocessing_manager

2588

2564

multiprocessing_manager = multiprocessing.Manager()

2607

2583

if server_settings["restore"]:

2608

2584

try:

2609

2585

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

2610

clients_data, old_client_settings = pickle.load(

2611

stored_state)

2586

clients_data, old_client_settings = (pickle.load

2587

(stored_state))

2612

2588

os.remove(stored_state_path)

2613

2589

except IOError as e:

2614

2590

if e.errno == errno.ENOENT:

2615

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

2616

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

2591

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

2592

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

2617

2593

else:

2618

2594

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

2619

2595

exc_info=e)

2620

2596

raise

2621

2597

except EOFError as e:

2622

2598

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

2623

"EOFError:",

2624

exc_info=e)

2599

"EOFError:", exc_info=e)

2625

2600

2626

2601

with PGPEngine() as pgp:

2627

2602

for client_name, client in clients_data.items():

2639

2614

# For each value in new config, check if it

2640

2615

# differs from the old config value (Except for

2641

2616

# the "secret" attribute)

2642

if (name != "secret"

2643

and (value !=

2644

old_client_settings[client_name][name])):

2617

if (name != "secret" and

2618

value != old_client_settings[client_name]

2619

[name]):

2645

2620

client[name] = value

2646

2621

except KeyError:

2647

2622

pass

2656

2631

if not client["last_checked_ok"]:

2657

2632

logger.warning(

2658

2633

"disabling client {} - Client never "

2659

"performed a successful checker".format(

2660

client_name))

2634

"performed a successful checker"

2635

.format(client_name))

2661

2636

client["enabled"] = False

2662

2637

elif client["last_checker_status"] != 0:

2663

2638

logger.warning(

2664

2639

"disabling client {} - Client last"

2665

" checker failed with error code"

2666

" {}".format(

2667

client_name,

2668

client["last_checker_status"]))

2640

" checker failed with error code {}"

2641

.format(client_name,

2642

client["last_checker_status"]))

2669

2643

client["enabled"] = False

2670

2644

else:

2671

client["expires"] = (

2672

datetime.datetime.utcnow()

2673

+ client["timeout"])

2645

client["expires"] = (datetime.datetime

2646

.utcnow()

2647

+ client["timeout"])

2674

2648

logger.debug("Last checker succeeded,"

2675

" keeping {} enabled".format(

2676

client_name))

2649

" keeping {} enabled"

2650

.format(client_name))

2677

2651

try:

2678

client["secret"] = pgp.decrypt(

2679

client["encrypted_secret"],

2680

client_settings[client_name]["secret"])

2652

client["secret"] = (

2653

pgp.decrypt(client["encrypted_secret"],

2654

client_settings[client_name]

2655

["secret"]))

2681

2656

except PGPError:

2682

2657

# If decryption fails, we use secret from new settings

2683

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

2684

client_name))

2685

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

2686

["secret"])

2658

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

2659

.format(client_name))

2660

client["secret"] = (

2661

client_settings[client_name]["secret"])

2687

2662

2688

2663

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

2689

2664

for client_name in (set(old_client_settings)

2696

2671

# Create all client objects

2697

2672

for client_name, client in clients_data.items():

2698

2673

tcp_server.clients[client_name] = client_class(

2699

name = client_name,

2700

settings = client,

2674

name = client_name, settings = client,

2701

2675

server_settings = server_settings)

2702

2676

2703

2677

if not tcp_server.clients:

2705

2679

2706

2680

if not foreground:

2707

2681

if pidfile is not None:

2708

pid = os.getpid()

2709

2682

try:

2710

2683

with pidfile:

2711

print(pid, file=pidfile)

2684

pid = os.getpid()

2685

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

2712

2686

except IOError:

2713

2687

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

2714

2688

pidfilename, pid)

2719

2693

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

2720

2694

2721

2695

if use_dbus:

2722

2723

@alternate_dbus_interfaces(

2724

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

2696

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

2697

"se.bsnet.fukt.Mandos"})

2725

2698

class MandosDBusService(DBusObjectWithProperties):

2726

2699

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

2727

2728

2700

def __init__(self):

2729

2701

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

2730

2731

2702

_interface = "se.recompile.Mandos"

2732

2703

2733

2704

@dbus_interface_annotations(_interface)

2734

2705

def _foo(self):

2735

return {

2736

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

2737

"false" }

2706

return { "org.freedesktop.DBus.Property"

2707

".EmitsChangedSignal":

2708

"false"}

2738

2709

2739

2710

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

2740

2711

def ClientAdded(self, objpath):

2754

2725

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

2755

2726

def GetAllClients(self):

2756

2727

"D-Bus method"

2757

return dbus.Array(c.dbus_object_path for c in

2728

return dbus.Array(c.dbus_object_path

2729

for c in

2758

2730

tcp_server.clients.itervalues())

2759

2731

2760

2732

@dbus.service.method(_interface,

2809

2781

# + secret.

2810

2782

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

2811

2783

"checker", "server_settings" }

2812

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

2813

.Object):

2784

for name, typ in (inspect.getmembers

2785

(dbus.service.Object)):

2814

2786

exclude.add(name)

2815

2787

2816

2788

client_dict["encrypted_secret"] = (client

2823

2795

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

2824

2796

2825

2797

try:

2826

with tempfile.NamedTemporaryFile(

2827

mode='wb',

2828

suffix=".pickle",

2829

prefix='clients-',

2830

dir=os.path.dirname(stored_state_path),

2831

delete=False) as stored_state:

2798

with (tempfile.NamedTemporaryFile

2799

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

2800

dir=os.path.dirname(stored_state_path),

2801

delete=False)) as stored_state:

2832

2802

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

2833

tempname = stored_state.name

2803

tempname=stored_state.name

2834

2804

os.rename(tempname, stored_state_path)

2835

2805

except (IOError, OSError) as e:

2836

2806

if not debug:

2855

2825

client.disable(quiet=True)

2856

2826

if use_dbus:

2857

2827

# Emit D-Bus signal

2858

mandos_dbus_service.ClientRemoved(

2859

client.dbus_object_path, client.name)

2828

mandos_dbus_service.ClientRemoved(client

2829

.dbus_object_path,

2830

client.name)

2860

2831

client_settings.clear()

2861

2832

2862

2833

atexit.register(cleanup)

2915

2886

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

2916

2887

cleanup()

2917

2888

2918

2919

2889

if __name__ == '__main__':

2920

2890

main()