/mandos/trunk : revision 729

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#!/usr/bin/python

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#!/usr/bin/python2.7

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# -*- mode: python; coding: utf-8 -*-

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#

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# Mandos server - give out binary blobs to connecting clients.

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# "AvahiService" class, and some lines in "main".

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#

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# Everything else is

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#

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# This program is free software: you can redistribute it and/or modify

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# it under the terms of the GNU General Public License as published by

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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try:

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from future_builtins import *

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except ImportError:

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pass

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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 errno

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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 gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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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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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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from gi.repository import GLib

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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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import ctypes.util

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except ImportError:

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.7.7"

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version = "1.6.8"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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try:

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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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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return interface_index

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def copy_function(func):

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"""Make a copy of a function"""

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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def initlogger(debug, level=logging.WARNING):

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger = (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.gpg = "gpg"

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try:

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output = subprocess.check_output(["gpgconf"])

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for line in output.splitlines():

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name, text, path = line.split(b":")

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--home', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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def 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([self.gpg, '--symmetric',

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proc = subprocess.Popen(['gpg', '--symmetric',

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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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([self.gpg, '--decrypt',

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proc = subprocess.Popen(['gpg', '--decrypt',

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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decrypted_plaintext, err = proc.communicate(input = data)

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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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# Pretend that we have an Avahi module

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class Avahi(object):

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"""This isn't so much a class as it is a module-like namespace.

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It is instantiated once, and simulates having an Avahi module."""

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IF_UNSPEC = -1 # avahi-common/address.h

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PROTO_UNSPEC = -1 # avahi-common/address.h

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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def string_array_to_txt_array(self, t):

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return dbus.Array((dbus.ByteArray(s.encode("utf-8"))

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for s in t), signature="ay")

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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

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SERVER_INVALID = 0 # avahi-common/defs.h

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SERVER_REGISTERING = 1 # avahi-common/defs.h

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SERVER_RUNNING = 2 # avahi-common/defs.h

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SERVER_COLLISION = 3 # avahi-common/defs.h

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SERVER_FAILURE = 4 # avahi-common/defs.h

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avahi = Avahi()

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class AvahiError(Exception):

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def __init__(self, value, *args, **kwargs):

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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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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self, remove=True):

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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logger.critical("No suitable Zeroconf service name found"

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

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

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self.name)

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if remove:

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self.remove()

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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if (error.get_dbus_name()

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

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logger.info("Local Zeroconf service name collision.")

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return self.rename(remove=False)

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else:

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

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self.cleanup()

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os._exit(1)

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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def remove(self):

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

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self.rename()

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elif state == avahi.ENTRY_GROUP_FAILURE:

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logger.critical("Avahi: Error in group state changed %s",

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str(error))

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raise AvahiGroupError("State changed: {!s}".format(error))

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unicode(error))

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

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

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self.cleanup()

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elif state == avahi.SERVER_RUNNING:

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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if (error.get_dbus_name()

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

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logger.info("Local Zeroconf service name"

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" collision.")

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return self.rename(remove=False)

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else:

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

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self.cleanup()

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os._exit(1)

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self.add()

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else:

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if error is None:

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

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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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class AvahiServiceToSyslog(AvahiService):

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

391

def rename(self):

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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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ret = AvahiService.rename(self)

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syslogger.setFormatter(logging.Formatter

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

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

397

.format(self.name)))

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return ret

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# Pretend that we have a GnuTLS module

483

class GnuTLS(object):

484

"""This isn't so much a class as it is a module-like namespace.

485

It is instantiated once, and simulates having a GnuTLS module."""

486

487

_library = ctypes.cdll.LoadLibrary(

488

ctypes.util.find_library("gnutls"))

489

_need_version = b"3.3.0"

490

def __init__(self):

491

# Need to use class name "GnuTLS" here, since this method is

492

# called before the assignment to the "gnutls" global variable

493

# happens.

494

if GnuTLS.check_version(self._need_version) is None:

495

raise GnuTLS.Error("Needs GnuTLS {} or later"

496

.format(self._need_version))

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498

# Unless otherwise indicated, the constants and types below are

499

# all from the gnutls/gnutls.h C header file.

500

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# Constants

502

E_SUCCESS = 0

503

E_INTERRUPTED = -52

504

E_AGAIN = -28

505

CRT_OPENPGP = 2

506

CLIENT = 2

507

SHUT_RDWR = 0

508

CRD_CERTIFICATE = 1

509

E_NO_CERTIFICATE_FOUND = -49

510

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

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512

# Types

513

class session_int(ctypes.Structure):

514

_fields_ = []

515

session_t = ctypes.POINTER(session_int)

516

class certificate_credentials_st(ctypes.Structure):

517

_fields_ = []

518

certificate_credentials_t = ctypes.POINTER(

519

certificate_credentials_st)

520

certificate_type_t = ctypes.c_int

521

class datum_t(ctypes.Structure):

522

_fields_ = [('data', ctypes.POINTER(ctypes.c_ubyte)),

523

('size', ctypes.c_uint)]

524

class openpgp_crt_int(ctypes.Structure):

525

_fields_ = []

526

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

527

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

528

log_func = ctypes.CFUNCTYPE(None, ctypes.c_int, ctypes.c_char_p)

529

credentials_type_t = ctypes.c_int

530

transport_ptr_t = ctypes.c_void_p

531

close_request_t = ctypes.c_int

532

533

# Exceptions

534

class Error(Exception):

535

# We need to use the class name "GnuTLS" here, since this

536

# exception might be raised from within GnuTLS.__init__,

537

# which is called before the assignment to the "gnutls"

538

# global variable has happened.

539

def __init__(self, message = None, code = None, args=()):

540

# Default usage is by a message string, but if a return

541

# code is passed, convert it to a string with

542

# gnutls.strerror()

543

self.code = code

544

if message is None and code is not None:

545

message = GnuTLS.strerror(code)

546

return super(GnuTLS.Error, self).__init__(

547

message, *args)

548

549

class CertificateSecurityError(Error):

550

pass

551

552

# Classes

553

class Credentials(object):

554

def __init__(self):

555

self._c_object = gnutls.certificate_credentials_t()

556

gnutls.certificate_allocate_credentials(

557

ctypes.byref(self._c_object))

558

self.type = gnutls.CRD_CERTIFICATE

559

560

def __del__(self):

561

gnutls.certificate_free_credentials(self._c_object)

562

563

class ClientSession(object):

564

def __init__(self, socket, credentials = None):

565

self._c_object = gnutls.session_t()

566

gnutls.init(ctypes.byref(self._c_object), gnutls.CLIENT)

567

gnutls.set_default_priority(self._c_object)

568

gnutls.transport_set_ptr(self._c_object, socket.fileno())

569

gnutls.handshake_set_private_extensions(self._c_object,

570

True)

571

self.socket = socket

572

if credentials is None:

573

credentials = gnutls.Credentials()

574

gnutls.credentials_set(self._c_object, credentials.type,

575

ctypes.cast(credentials._c_object,

576

ctypes.c_void_p))

577

self.credentials = credentials

578

579

def __del__(self):

580

gnutls.deinit(self._c_object)

581

582

def handshake(self):

583

return gnutls.handshake(self._c_object)

584

585

def send(self, data):

586

data = bytes(data)

587

data_len = len(data)

588

while data_len > 0:

589

data_len -= gnutls.record_send(self._c_object,

590

data[-data_len:],

591

data_len)

592

593

def bye(self):

594

return gnutls.bye(self._c_object, gnutls.SHUT_RDWR)

595

596

# Error handling functions

597

def _error_code(result):

598

"""A function to raise exceptions on errors, suitable

599

for the 'restype' attribute on ctypes functions"""

600

if result >= 0:

601

return result

602

if result == gnutls.E_NO_CERTIFICATE_FOUND:

603

raise gnutls.CertificateSecurityError(code = result)

604

raise gnutls.Error(code = result)

605

606

def _retry_on_error(result, func, arguments):

607

"""A function to retry on some errors, suitable

608

for the 'errcheck' attribute on ctypes functions"""

609

while result < 0:

610

if result not in (gnutls.E_INTERRUPTED, gnutls.E_AGAIN):

611

return _error_code(result)

612

result = func(*arguments)

613

return result

614

615

# Unless otherwise indicated, the function declarations below are

616

# all from the gnutls/gnutls.h C header file.

617

618

# Functions

619

priority_set_direct = _library.gnutls_priority_set_direct

620

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

621

ctypes.POINTER(ctypes.c_char_p)]

622

priority_set_direct.restype = _error_code

623

624

init = _library.gnutls_init

625

init.argtypes = [ctypes.POINTER(session_t), ctypes.c_int]

626

init.restype = _error_code

627

628

set_default_priority = _library.gnutls_set_default_priority

629

set_default_priority.argtypes = [session_t]

630

set_default_priority.restype = _error_code

631

632

record_send = _library.gnutls_record_send

633

record_send.argtypes = [session_t, ctypes.c_void_p,

634

ctypes.c_size_t]

635

record_send.restype = ctypes.c_ssize_t

636

record_send.errcheck = _retry_on_error

637

638

certificate_allocate_credentials = (

639

_library.gnutls_certificate_allocate_credentials)

640

certificate_allocate_credentials.argtypes = [

641

ctypes.POINTER(certificate_credentials_t)]

642

certificate_allocate_credentials.restype = _error_code

643

644

certificate_free_credentials = (

645

_library.gnutls_certificate_free_credentials)

646

certificate_free_credentials.argtypes = [certificate_credentials_t]

647

certificate_free_credentials.restype = None

648

649

handshake_set_private_extensions = (

650

_library.gnutls_handshake_set_private_extensions)

651

handshake_set_private_extensions.argtypes = [session_t,

652

ctypes.c_int]

653

handshake_set_private_extensions.restype = None

654

655

credentials_set = _library.gnutls_credentials_set

656

credentials_set.argtypes = [session_t, credentials_type_t,

657

ctypes.c_void_p]

658

credentials_set.restype = _error_code

659

660

strerror = _library.gnutls_strerror

661

strerror.argtypes = [ctypes.c_int]

662

strerror.restype = ctypes.c_char_p

663

664

certificate_type_get = _library.gnutls_certificate_type_get

665

certificate_type_get.argtypes = [session_t]

666

certificate_type_get.restype = _error_code

667

668

certificate_get_peers = _library.gnutls_certificate_get_peers

669

certificate_get_peers.argtypes = [session_t,

670

ctypes.POINTER(ctypes.c_uint)]

671

certificate_get_peers.restype = ctypes.POINTER(datum_t)

672

673

global_set_log_level = _library.gnutls_global_set_log_level

674

global_set_log_level.argtypes = [ctypes.c_int]

675

global_set_log_level.restype = None

676

677

global_set_log_function = _library.gnutls_global_set_log_function

678

global_set_log_function.argtypes = [log_func]

679

global_set_log_function.restype = None

680

681

deinit = _library.gnutls_deinit

682

deinit.argtypes = [session_t]

683

deinit.restype = None

684

685

handshake = _library.gnutls_handshake

686

handshake.argtypes = [session_t]

687

handshake.restype = _error_code

688

handshake.errcheck = _retry_on_error

689

690

transport_set_ptr = _library.gnutls_transport_set_ptr

691

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

692

transport_set_ptr.restype = None

693

694

bye = _library.gnutls_bye

695

bye.argtypes = [session_t, close_request_t]

696

bye.restype = _error_code

697

bye.errcheck = _retry_on_error

698

699

check_version = _library.gnutls_check_version

700

check_version.argtypes = [ctypes.c_char_p]

701

check_version.restype = ctypes.c_char_p

702

703

# All the function declarations below are from gnutls/openpgp.h

704

705

openpgp_crt_init = _library.gnutls_openpgp_crt_init

706

openpgp_crt_init.argtypes = [ctypes.POINTER(openpgp_crt_t)]

707

openpgp_crt_init.restype = _error_code

708

709

openpgp_crt_import = _library.gnutls_openpgp_crt_import

710

openpgp_crt_import.argtypes = [openpgp_crt_t,

711

ctypes.POINTER(datum_t),

712

openpgp_crt_fmt_t]

713

openpgp_crt_import.restype = _error_code

714

715

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

716

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

717

ctypes.POINTER(ctypes.c_uint)]

718

openpgp_crt_verify_self.restype = _error_code

719

720

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

721

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

722

openpgp_crt_deinit.restype = None

723

724

openpgp_crt_get_fingerprint = (

725

_library.gnutls_openpgp_crt_get_fingerprint)

726

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

727

ctypes.c_void_p,

728

ctypes.POINTER(

729

ctypes.c_size_t)]

730

openpgp_crt_get_fingerprint.restype = _error_code

731

732

# Remove non-public functions

733

del _error_code, _retry_on_error

734

# Create the global "gnutls" object, simulating a module

735

gnutls = GnuTLS()

736

737

def call_pipe(connection, # : multiprocessing.Connection

738

func, *args, **kwargs):

739

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

740

741

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

742

return value on the provided multiprocessing.Connection.

743

"""

744

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

745

connection.close()

746

400

747

401

class Client(object):

748

402

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

754

408

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

755

409

to see if the client lives.

756

410

'None' if no process is running.

757

checker_callback_tag: a GLib event source tag, or None

411

checker_callback_tag: a gobject event source tag, or None

758

412

checker_command: string; External command which is run to check

759

413

if client lives. %() expansions are done at

760

414

runtime with vars(self) as dict, so that for

761

415

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

762

checker_initiator_tag: a GLib event source tag, or None

416

checker_initiator_tag: a gobject event source tag, or None

763

417

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

764

418

client_structure: Object describing what attributes a client has

765

419

and is used for storing the client at exit

766

420

current_checker_command: string; current running checker_command

767

disable_initiator_tag: a GLib event source tag, or None

421

disable_initiator_tag: a gobject event source tag, or None

768

422

enabled: bool()

769

423

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

770

424

uniquely identify the client

775

429

last_checker_status: integer between 0 and 255 reflecting exit

776

430

status of last checker. -1 reflects crashed

777

431

checker, -2 means no checker completed yet.

778

last_checker_signal: The signal which killed the last checker, if

779

last_checker_status is -1

780

432

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

781

433

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

782

434

D-Bus identifiers

795

447

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

796

448

"last_approval_request", "last_checked_ok",

797

449

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

798

client_defaults = {

799

"timeout": "PT5M",

800

"extended_timeout": "PT15M",

801

"interval": "PT2M",

802

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

803

"host": "",

804

"approval_delay": "PT0S",

805

"approval_duration": "PT1S",

806

"approved_by_default": "True",

807

"enabled": "True",

808

}

450

client_defaults = { "timeout": "PT5M",

451

"extended_timeout": "PT15M",

452

"interval": "PT2M",

453

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

454

"host": "",

455

"approval_delay": "PT0S",

456

"approval_duration": "PT1S",

457

"approved_by_default": "True",

458

"enabled": "True",

459

}

809

460

810

461

@staticmethod

811

462

def config_parser(config):

827

478

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

828

479

"enabled")

829

480

830

# Uppercase and remove spaces from fingerprint for later

831

# comparison purposes with return value from the

832

# fingerprint() function

833

481

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

834

482

.replace(" ", ""))

835

483

if "secret" in section:

836

client["secret"] = codecs.decode(section["secret"]

837

.encode("utf-8"),

838

"base64")

484

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

839

485

elif "secfile" in section:

840

486

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

841

487

(section["secfile"])),

879

525

self.expires = None

880

526

881

527

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

528

# Uppercase and remove spaces from fingerprint for later

529

# comparison purposes with return value from the fingerprint()

530

# function

882

531

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

883

532

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

884

533

datetime.datetime.utcnow())

891

540

self.current_checker_command = None

892

541

self.approved = None

893

542

self.approvals_pending = 0

894

self.changedstate = multiprocessing_manager.Condition(

895

multiprocessing_manager.Lock())

896

self.client_structure = [attr

897

for attr in self.__dict__.keys()

543

self.changedstate = (multiprocessing_manager

544

.Condition(multiprocessing_manager

545

.Lock()))

546

self.client_structure = [attr for attr in

547

self.__dict__.iterkeys()

898

548

if not attr.startswith("_")]

899

549

self.client_structure.append("client_structure")

900

550

901

for name, t in inspect.getmembers(

902

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

551

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

552

lambda obj:

553

isinstance(obj,

554

property)):

903

555

if not name.startswith("_"):

904

556

self.client_structure.append(name)

905

557

926

578

if not quiet:

927

579

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

928

580

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

929

GLib.source_remove(self.disable_initiator_tag)

581

gobject.source_remove(self.disable_initiator_tag)

930

582

self.disable_initiator_tag = None

931

583

self.expires = None

932

584

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

933

GLib.source_remove(self.checker_initiator_tag)

585

gobject.source_remove(self.checker_initiator_tag)

934

586

self.checker_initiator_tag = None

935

587

self.stop_checker()

936

588

self.enabled = False

937

589

if not quiet:

938

590

self.send_changedstate()

939

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

591

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

940

592

return False

941

593

942

594

def __del__(self):

946

598

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

947

599

# and every interval from then on.

948

600

if self.checker_initiator_tag is not None:

949

GLib.source_remove(self.checker_initiator_tag)

950

self.checker_initiator_tag = GLib.timeout_add(

951

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

952

self.start_checker)

601

gobject.source_remove(self.checker_initiator_tag)

602

self.checker_initiator_tag = (gobject.timeout_add

603

(int(self.interval

604

.total_seconds() * 1000),

605

self.start_checker))

953

606

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

954

607

if self.disable_initiator_tag is not None:

955

GLib.source_remove(self.disable_initiator_tag)

956

self.disable_initiator_tag = GLib.timeout_add(

957

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

608

gobject.source_remove(self.disable_initiator_tag)

609

self.disable_initiator_tag = (gobject.timeout_add

610

(int(self.timeout

611

.total_seconds() * 1000),

612

self.disable))

958

613

# Also start a new checker *right now*.

959

614

self.start_checker()

960

615

961

def checker_callback(self, source, condition, connection,

962

command):

616

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

963

617

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

964

618

self.checker_callback_tag = None

965

619

self.checker = None

966

# Read return code from connection (see call_pipe)

967

returncode = connection.recv()

968

connection.close()

969

970

if returncode >= 0:

971

self.last_checker_status = returncode

972

self.last_checker_signal = None

620

if os.WIFEXITED(condition):

621

self.last_checker_status = os.WEXITSTATUS(condition)

973

622

if self.last_checker_status == 0:

974

623

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

975

624

vars(self))

976

625

self.checked_ok()

977

626

else:

978

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

627

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

628

vars(self))

979

629

else:

980

630

self.last_checker_status = -1

981

self.last_checker_signal = -returncode

982

631

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

983

632

vars(self))

984

return False

985

633

986

634

def checked_ok(self):

987

635

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

988

636

self.last_checked_ok = datetime.datetime.utcnow()

989

637

self.last_checker_status = 0

990

self.last_checker_signal = None

991

638

self.bump_timeout()

992

639

993

640

def bump_timeout(self, timeout=None):

995

642

if timeout is None:

996

643

timeout = self.timeout

997

644

if self.disable_initiator_tag is not None:

998

GLib.source_remove(self.disable_initiator_tag)

645

gobject.source_remove(self.disable_initiator_tag)

999

646

self.disable_initiator_tag = None

1000

647

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

1001

self.disable_initiator_tag = GLib.timeout_add(

1002

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

648

self.disable_initiator_tag = (gobject.timeout_add

649

(int(timeout.total_seconds()

650

* 1000), self.disable))

1003

651

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

1004

652

1005

653

def need_approval(self):

1019

667

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

1020

668

# should be.

1021

669

1022

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

1023

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

1024

self.checker.join()

1025

self.checker = None

670

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

671

try:

672

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

673

except AttributeError:

674

pass

675

except OSError as error:

676

if error.errno != errno.ECHILD:

677

raise

678

else:

679

if pid:

680

logger.warning("Checker was a zombie")

681

gobject.source_remove(self.checker_callback_tag)

682

self.checker_callback(pid, status,

683

self.current_checker_command)

1026

684

# Start a new checker if needed

1027

685

if self.checker is None:

1028

686

# Escape attributes for the shell

1029

escaped_attrs = {

1030

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

1031

for attr in self.runtime_expansions }

687

escaped_attrs = { attr:

688

re.escape(unicode(getattr(self,

689

attr)))

690

for attr in self.runtime_expansions }

1032

691

try:

1033

692

command = self.checker_command % escaped_attrs

1034

693

except TypeError as error:

1035

694

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

1036

self.checker_command,

695

self.checker_command, exc_info=error)

696

return True # Try again later

697

self.current_checker_command = command

698

try:

699

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

700

command, self.name)

701

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

702

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

703

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

704

# always replaced by /dev/null.)

705

# The exception is when not debugging but nevertheless

706

# running in the foreground; use the previously

707

# created wnull.

708

popen_args = {}

709

if (not self.server_settings["debug"]

710

and self.server_settings["foreground"]):

711

popen_args.update({"stdout": wnull,

712

"stderr": wnull })

713

self.checker = subprocess.Popen(command,

714

close_fds=True,

715

shell=True, cwd="/",

716

**popen_args)

717

except OSError as error:

718

logger.error("Failed to start subprocess",

1037

719

exc_info=error)

1038

return True # Try again later

1039

self.current_checker_command = command

1040

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

1041

self.name)

1042

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

1043

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

1044

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

1045

# always replaced by /dev/null.)

1046

# The exception is when not debugging but nevertheless

1047

# running in the foreground; use the previously

1048

# created wnull.

1049

popen_args = { "close_fds": True,

1050

"shell": True,

1051

"cwd": "/" }

1052

if (not self.server_settings["debug"]

1053

and self.server_settings["foreground"]):

1054

popen_args.update({"stdout": wnull,

1055

"stderr": wnull })

1056

pipe = multiprocessing.Pipe(duplex = False)

1057

self.checker = multiprocessing.Process(

1058

target = call_pipe,

1059

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

1060

kwargs = popen_args)

1061

self.checker.start()

1062

self.checker_callback_tag = GLib.io_add_watch(

1063

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

1064

self.checker_callback, pipe[0], command)

1065

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

720

return True

721

self.checker_callback_tag = (gobject.child_watch_add

722

(self.checker.pid,

723

self.checker_callback,

724

data=command))

725

# The checker may have completed before the gobject

726

# watch was added. Check for this.

727

try:

728

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

729

except OSError as error:

730

if error.errno == errno.ECHILD:

731

# This should never happen

732

logger.error("Child process vanished",

733

exc_info=error)

734

return True

735

raise

736

if pid:

737

gobject.source_remove(self.checker_callback_tag)

738

self.checker_callback(pid, status, command)

739

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

1066

740

return True

1067

741

1068

742

def stop_checker(self):

1069

743

"""Force the checker process, if any, to stop."""

1070

744

if self.checker_callback_tag:

1071

GLib.source_remove(self.checker_callback_tag)

745

gobject.source_remove(self.checker_callback_tag)

1072

746

self.checker_callback_tag = None

1073

747

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

1074

748

return

1075

749

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

1076

self.checker.terminate()

750

try:

751

self.checker.terminate()

752

#time.sleep(0.5)

753

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

754

# self.checker.kill()

755

except OSError as error:

756

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

757

raise

1077

758

self.checker = None

1078

759

1079

760

1080

def dbus_service_property(dbus_interface,

1081

signature="v",

1082

access="readwrite",

1083

byte_arrays=False):

761

def dbus_service_property(dbus_interface, signature="v",

762

access="readwrite", byte_arrays=False):

1084

763

"""Decorators for marking methods of a DBusObjectWithProperties to

1085

764

become properties on the D-Bus.

1086

765

1096

775

if byte_arrays and signature != "ay":

1097

776

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

1098

777

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

1099

1100

778

def decorator(func):

1101

779

func._dbus_is_property = True

1102

780

func._dbus_interface = dbus_interface

1107

785

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

1108

786

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1109

787

return func

1110

1111

788

return decorator

1112

789

1113

790

1122

799

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

1123

800

"false"}

1124

801

"""

1125

1126

802

def decorator(func):

1127

803

func._dbus_is_interface = True

1128

804

func._dbus_interface = dbus_interface

1129

805

func._dbus_name = dbus_interface

1130

806

return func

1131

1132

807

return decorator

1133

808

1134

809

1136

811

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

1137

812

Usage:

1138

813

1139

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

1140

"org.freedesktop.DBus.Property."

1141

"EmitsChangedSignal": "false"})

1142

814

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

1143

815

access="r")

816

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

817

"org.freedesktop.DBus.Property."

818

"EmitsChangedSignal": "false"})

1144

819

def Property_dbus_property(self):

1145

820

return dbus.Boolean(False)

1146

1147

See also the DBusObjectWithAnnotations class.

1148

821

"""

1149

1150

822

def decorator(func):

1151

823

func._dbus_annotations = annotations

1152

824

return func

1153

1154

825

return decorator

1155

826

1156

827

1159

830

"""

1160

831

pass

1161

832

1162

1163

833

class DBusPropertyAccessException(DBusPropertyException):

1164

834

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

1165

835

"""

1172

842

pass

1173

843

1174

844

1175

class DBusObjectWithAnnotations(dbus.service.Object):

1176

"""A D-Bus object with annotations.

845

class DBusObjectWithProperties(dbus.service.Object):

846

"""A D-Bus object with properties.

1177

847

1178

Classes inheriting from this can use the dbus_annotations

1179

decorator to add annotations to methods or signals.

848

Classes inheriting from this can use the dbus_service_property

849

decorator to expose methods as D-Bus properties. It exposes the

850

standard Get(), Set(), and GetAll() methods on the D-Bus.

1180

851

"""

1181

852

1182

853

@staticmethod

1192

863

def _get_all_dbus_things(self, thing):

1193

864

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

1194

865

"""

1195

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

866

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

867

name),

1196

868

athing.__get__(self))

1197

869

for cls in self.__class__.__mro__

1198

870

for name, athing in

1199

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

1200

1201

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1202

out_signature = "s",

1203

path_keyword = 'object_path',

1204

connection_keyword = 'connection')

1205

def Introspect(self, object_path, connection):

1206

"""Overloading of standard D-Bus method.

1207

1208

Inserts annotation tags on methods and signals.

1209

"""

1210

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

1211

connection)

1212

try:

1213

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

1214

1215

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

1216

# Add annotation tags

1217

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

1218

for tag in if_tag.getElementsByTagName(typ):

1219

annots = dict()

1220

for name, prop in (self.

1221

_get_all_dbus_things(typ)):

1222

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

1223

and prop._dbus_interface

1224

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

1225

annots.update(getattr(

1226

prop, "_dbus_annotations", {}))

1227

for name, value in annots.items():

1228

ann_tag = document.createElement(

1229

"annotation")

1230

ann_tag.setAttribute("name", name)

1231

ann_tag.setAttribute("value", value)

1232

tag.appendChild(ann_tag)

1233

# Add interface annotation tags

1234

for annotation, value in dict(

1235

itertools.chain.from_iterable(

1236

annotations().items()

1237

for name, annotations

1238

in self._get_all_dbus_things("interface")

1239

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

1240

)).items():

1241

ann_tag = document.createElement("annotation")

1242

ann_tag.setAttribute("name", annotation)

1243

ann_tag.setAttribute("value", value)

1244

if_tag.appendChild(ann_tag)

1245

# Fix argument name for the Introspect method itself

1246

if (if_tag.getAttribute("name")

1247

== dbus.INTROSPECTABLE_IFACE):

1248

for cn in if_tag.getElementsByTagName("method"):

1249

if cn.getAttribute("name") == "Introspect":

1250

for arg in cn.getElementsByTagName("arg"):

1251

if (arg.getAttribute("direction")

1252

== "out"):

1253

arg.setAttribute("name",

1254

"xml_data")

1255

xmlstring = document.toxml("utf-8")

1256

document.unlink()

1257

except (AttributeError, xml.dom.DOMException,

1258

xml.parsers.expat.ExpatError) as error:

1259

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

1260

exc_info=error)

1261

return xmlstring

1262

1263

1264

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1265

"""A D-Bus object with properties.

1266

1267

Classes inheriting from this can use the dbus_service_property

1268

decorator to expose methods as D-Bus properties. It exposes the

1269

standard Get(), Set(), and GetAll() methods on the D-Bus.

1270

"""

871

inspect.getmembers(cls,

872

self._is_dbus_thing(thing)))

1271

873

1272

874

def _get_dbus_property(self, interface_name, property_name):

1273

875

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

1274

876

property with the specified name and interface.

1275

877

"""

1276

for cls in self.__class__.__mro__:

1277

for name, value in inspect.getmembers(

1278

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

878

for cls in self.__class__.__mro__:

879

for name, value in (inspect.getmembers

880

(cls,

881

self._is_dbus_thing("property"))):

1279

882

if (value._dbus_name == property_name

1280

883

and value._dbus_interface == interface_name):

1281

884

return value.__get__(self)

1282

885

1283

886

# No such property

1284

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

1285

self.dbus_object_path, interface_name, property_name))

1286

1287

@classmethod

1288

def _get_all_interface_names(cls):

1289

"""Get a sequence of all interfaces supported by an object"""

1290

return (name for name in set(getattr(getattr(x, attr),

1291

"_dbus_interface", None)

1292

for x in (inspect.getmro(cls))

1293

for attr in dir(x))

1294

if name is not None)

1295

1296

@dbus.service.method(dbus.PROPERTIES_IFACE,

1297

in_signature="ss",

887

raise DBusPropertyNotFound(self.dbus_object_path + ":"

888

+ interface_name + "."

889

+ property_name)

890

891

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

1298

892

out_signature="v")

1299

893

def Get(self, interface_name, property_name):

1300

894

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

1325

919

for byte in value))

1326

920

prop(value)

1327

921

1328

@dbus.service.method(dbus.PROPERTIES_IFACE,

1329

in_signature="s",

922

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

1330

923

out_signature="a{sv}")

1331

924

def GetAll(self, interface_name):

1332

925

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

1347

940

if not hasattr(value, "variant_level"):

1348

941

properties[name] = value

1349

942

continue

1350

properties[name] = type(value)(

1351

value, variant_level = value.variant_level + 1)

943

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

944

value.variant_level+1)

1352

945

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

1353

946

1354

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

1355

def PropertiesChanged(self, interface_name, changed_properties,

1356

invalidated_properties):

1357

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

1358

standard.

1359

"""

1360

pass

1361

1362

947

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1363

948

out_signature="s",

1364

949

path_keyword='object_path',

1368

953

1369

954

Inserts property tags and interface annotation tags.

1370

955

"""

1371

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1372

object_path,

1373

connection)

956

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

957

connection)

1374

958

try:

1375

959

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

1376

1377

960

def make_tag(document, name, prop):

1378

961

e = document.createElement("property")

1379

962

e.setAttribute("name", name)

1380

963

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

1381

964

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

1382

965

return e

1383

1384

966

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

1385

967

# Add property tags

1386

968

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

1389

971

if prop._dbus_interface

1390

972

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

1391

973

if_tag.appendChild(tag)

1392

# Add annotation tags for properties

1393

for tag in if_tag.getElementsByTagName("property"):

1394

annots = dict()

1395

for name, prop in self._get_all_dbus_things(

1396

"property"):

1397

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

1398

and prop._dbus_interface

1399

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

1400

annots.update(getattr(

1401

prop, "_dbus_annotations", {}))

1402

for name, value in annots.items():

1403

ann_tag = document.createElement(

1404

"annotation")

1405

ann_tag.setAttribute("name", name)

1406

ann_tag.setAttribute("value", value)

1407

tag.appendChild(ann_tag)

974

# Add annotation tags

975

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

976

for tag in if_tag.getElementsByTagName(typ):

977

annots = dict()

978

for name, prop in (self.

979

_get_all_dbus_things(typ)):

980

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

981

and prop._dbus_interface

982

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

983

annots.update(getattr

984

(prop,

985

"_dbus_annotations",

986

{}))

987

for name, value in annots.items():

988

ann_tag = document.createElement(

989

"annotation")

990

ann_tag.setAttribute("name", name)

991

ann_tag.setAttribute("value", value)

992

tag.appendChild(ann_tag)

993

# Add interface annotation tags

994

for annotation, value in dict(

995

itertools.chain.from_iterable(

996

annotations().items()

997

for name, annotations in

998

self._get_all_dbus_things("interface")

999

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

1000

)).items():

1001

ann_tag = document.createElement("annotation")

1002

ann_tag.setAttribute("name", annotation)

1003

ann_tag.setAttribute("value", value)

1004

if_tag.appendChild(ann_tag)

1408

1005

# Add the names to the return values for the

1409

1006

# "org.freedesktop.DBus.Properties" methods

1410

1007

if (if_tag.getAttribute("name")

1428

1025

exc_info=error)

1429

1026

return xmlstring

1430

1027

1431

try:

1432

dbus.OBJECT_MANAGER_IFACE

1433

except AttributeError:

1434

dbus.OBJECT_MANAGER_IFACE = "org.freedesktop.DBus.ObjectManager"

1435

1436

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1437

"""A D-Bus object with an ObjectManager.

1438

1439

Classes inheriting from this exposes the standard

1440

GetManagedObjects call and the InterfacesAdded and

1441

InterfacesRemoved signals on the standard

1442

"org.freedesktop.DBus.ObjectManager" interface.

1443

1444

Note: No signals are sent automatically; they must be sent

1445

manually.

1446

"""

1447

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1448

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

1449

def GetManagedObjects(self):

1450

"""This function must be overridden"""

1451

raise NotImplementedError()

1452

1453

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1454

signature = "oa{sa{sv}}")

1455

def InterfacesAdded(self, object_path, interfaces_and_properties):

1456

pass

1457

1458

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE, signature = "oas")

1459

def InterfacesRemoved(self, object_path, interfaces):

1460

pass

1461

1462

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1463

out_signature = "s",

1464

path_keyword = 'object_path',

1465

connection_keyword = 'connection')

1466

def Introspect(self, object_path, connection):

1467

"""Overloading of standard D-Bus method.

1468

1469

Override return argument name of GetManagedObjects to be

1470

"objpath_interfaces_and_properties"

1471

"""

1472

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1473

object_path,

1474

connection)

1475

try:

1476

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

1477

1478

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

1479

# Fix argument name for the GetManagedObjects method

1480

if (if_tag.getAttribute("name")

1481

== dbus.OBJECT_MANAGER_IFACE):

1482

for cn in if_tag.getElementsByTagName("method"):

1483

if (cn.getAttribute("name")

1484

== "GetManagedObjects"):

1485

for arg in cn.getElementsByTagName("arg"):

1486

if (arg.getAttribute("direction")

1487

== "out"):

1488

arg.setAttribute(

1489

"name",

1490

"objpath_interfaces"

1491

"_and_properties")

1492

xmlstring = document.toxml("utf-8")

1493

document.unlink()

1494

except (AttributeError, xml.dom.DOMException,

1495

xml.parsers.expat.ExpatError) as error:

1496

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

1497

exc_info = error)

1498

return xmlstring

1499

1028

1500

1029

def datetime_to_dbus(dt, variant_level=0):

1501

1030

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

1502

1031

if dt is None:

1503

1032

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

1504

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

1033

return dbus.String(dt.isoformat(),

1034

variant_level=variant_level)

1505

1035

1506

1036

1507

1037

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1527

1057

(from DBusObjectWithProperties) and interfaces (from the

1528

1058

dbus_interface_annotations decorator).

1529

1059

"""

1530

1531

1060

def wrapper(cls):

1532

1061

for orig_interface_name, alt_interface_name in (

1533

alt_interface_names.items()):

1062

alt_interface_names.items()):

1534

1063

attr = {}

1535

1064

interface_names = set()

1536

1065

# Go though all attributes of the class

1538

1067

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

1539

1068

# with the wrong interface name

1540

1069

if (not hasattr(attribute, "_dbus_interface")

1541

or not attribute._dbus_interface.startswith(

1542

orig_interface_name)):

1070

or not attribute._dbus_interface

1071

.startswith(orig_interface_name)):

1543

1072

continue

1544

1073

# Create an alternate D-Bus interface name based on

1545

1074

# the current name

1546

alt_interface = attribute._dbus_interface.replace(

1547

orig_interface_name, alt_interface_name)

1075

alt_interface = (attribute._dbus_interface

1076

.replace(orig_interface_name,

1077

alt_interface_name))

1548

1078

interface_names.add(alt_interface)

1549

1079

# Is this a D-Bus signal?

1550

1080

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

1551

1081

# Extract the original non-method undecorated

1552

1082

# function by black magic

1553

if sys.version_info.major == 2:

1554

nonmethod_func = (dict(

1083

nonmethod_func = (dict(

1555

1084

zip(attribute.func_code.co_freevars,

1556

attribute.__closure__))

1557

["func"].cell_contents)

1558

else:

1559

nonmethod_func = (dict(

1560

zip(attribute.__code__.co_freevars,

1561

attribute.__closure__))

1562

["func"].cell_contents)

1085

attribute.__closure__))["func"]

1086

.cell_contents)

1563

1087

# Create a new, but exactly alike, function

1564

1088

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

1565

1089

# with the alternate D-Bus interface name

1566

new_function = copy_function(nonmethod_func)

1567

new_function = (dbus.service.signal(

1568

alt_interface,

1569

attribute._dbus_signature)(new_function))

1090

new_function = (dbus.service.signal

1091

(alt_interface,

1092

attribute._dbus_signature)

1093

(types.FunctionType(

1094

nonmethod_func.func_code,

1095

nonmethod_func.func_globals,

1096

nonmethod_func.func_name,

1097

nonmethod_func.func_defaults,

1098

nonmethod_func.func_closure)))

1570

1099

# Copy annotations, if any

1571

1100

try:

1572

new_function._dbus_annotations = dict(

1573

attribute._dbus_annotations)

1101

new_function._dbus_annotations = (

1102

dict(attribute._dbus_annotations))

1574

1103

except AttributeError:

1575

1104

pass

1576

1105

# Define a creator of a function to call both the

1581

1110

"""This function is a scope container to pass

1582

1111

func1 and func2 to the "call_both" function

1583

1112

outside of its arguments"""

1584

1585

@functools.wraps(func2)

1586

1113

def call_both(*args, **kwargs):

1587

1114

"""This function will emit two D-Bus

1588

1115

signals by calling func1 and func2"""

1589

1116

func1(*args, **kwargs)

1590

1117

func2(*args, **kwargs)

1591

# Make wrapper function look like a D-Bus signal

1592

for name, attr in inspect.getmembers(func2):

1593

if name.startswith("_dbus_"):

1594

setattr(call_both, name, attr)

1595

1596

1118

return call_both

1597

1119

# Create the "call_both" function and add it to

1598

1120

# the class

1603

1125

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

1604

1126

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

1605

1127

# to the class.

1606

attr[attrname] = (

1607

dbus.service.method(

1608

alt_interface,

1609

attribute._dbus_in_signature,

1610

attribute._dbus_out_signature)

1611

(copy_function(attribute)))

1128

attr[attrname] = (dbus.service.method

1129

(alt_interface,

1130

attribute._dbus_in_signature,

1131

attribute._dbus_out_signature)

1132

(types.FunctionType

1133

(attribute.func_code,

1134

attribute.func_globals,

1135

attribute.func_name,

1136

attribute.func_defaults,

1137

attribute.func_closure)))

1612

1138

# Copy annotations, if any

1613

1139

try:

1614

attr[attrname]._dbus_annotations = dict(

1615

attribute._dbus_annotations)

1140

attr[attrname]._dbus_annotations = (

1141

dict(attribute._dbus_annotations))

1616

1142

except AttributeError:

1617

1143

pass

1618

1144

# Is this a D-Bus property?

1621

1147

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

1622

1148

# property with the alternate D-Bus interface

1623

1149

# name. Add it to the class.

1624

attr[attrname] = (dbus_service_property(

1625

alt_interface, attribute._dbus_signature,

1626

attribute._dbus_access,

1627

attribute._dbus_get_args_options

1628

["byte_arrays"])

1629

(copy_function(attribute)))

1150

attr[attrname] = (dbus_service_property

1151

(alt_interface,

1152

attribute._dbus_signature,

1153

attribute._dbus_access,

1154

attribute

1155

._dbus_get_args_options

1156

["byte_arrays"])

1157

(types.FunctionType

1158

(attribute.func_code,

1159

attribute.func_globals,

1160

attribute.func_name,

1161

attribute.func_defaults,

1162

attribute.func_closure)))

1630

1163

# Copy annotations, if any

1631

1164

try:

1632

attr[attrname]._dbus_annotations = dict(

1633

attribute._dbus_annotations)

1165

attr[attrname]._dbus_annotations = (

1166

dict(attribute._dbus_annotations))

1634

1167

except AttributeError:

1635

1168

pass

1636

1169

# Is this a D-Bus interface?

1639

1172

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

1640

1173

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

1641

1174

# to the class.

1642

attr[attrname] = (

1643

dbus_interface_annotations(alt_interface)

1644

(copy_function(attribute)))

1175

attr[attrname] = (dbus_interface_annotations

1176

(alt_interface)

1177

(types.FunctionType

1178

(attribute.func_code,

1179

attribute.func_globals,

1180

attribute.func_name,

1181

attribute.func_defaults,

1182

attribute.func_closure)))

1645

1183

if deprecate:

1646

1184

# Deprecate all alternate interfaces

1647

1185

iname="_AlternateDBusNames_interface_annotation{}"

1648

1186

for interface_name in interface_names:

1649

1650

1187

@dbus_interface_annotations(interface_name)

1651

1188

def func(self):

1652

1189

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

1653

"true" }

1190

"true" }

1654

1191

# Find an unused name

1655

1192

for aname in (iname.format(i)

1656

1193

for i in itertools.count()):

1660

1197

if interface_names:

1661

1198

# Replace the class with a new subclass of it with

1662

1199

# methods, signals, etc. as created above.

1663

if sys.version_info.major == 2:

1664

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

1665

(cls, ), attr)

1666

else:

1667

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

1668

(cls, ), attr)

1200

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

1201

(cls,), attr)

1669

1202

return cls

1670

1671

1203

return wrapper

1672

1204

1673

1205

1674

1206

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

1675

"se.bsnet.fukt.Mandos"})

1207

"se.bsnet.fukt.Mandos"})

1676

1208

class ClientDBus(Client, DBusObjectWithProperties):

1677

1209

"""A Client class using D-Bus

1678

1210

1682

1214

"""

1683

1215

1684

1216

runtime_expansions = (Client.runtime_expansions

1685

+ ("dbus_object_path", ))

1686

1687

_interface = "se.recompile.Mandos.Client"

1217

+ ("dbus_object_path",))

1688

1218

1689

1219

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

1690

1220

1693

1223

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

1694

1224

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

1695

1225

# the D-Bus

1696

client_object_name = str(self.name).translate(

1226

client_object_name = unicode(self.name).translate(

1697

1227

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

1698

1228

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

1699

self.dbus_object_path = dbus.ObjectPath(

1700

"/clients/" + client_object_name)

1229

self.dbus_object_path = (dbus.ObjectPath

1230

("/clients/" + client_object_name))

1701

1231

DBusObjectWithProperties.__init__(self, self.bus,

1702

1232

self.dbus_object_path)

1703

1233

1704

def notifychangeproperty(transform_func, dbus_name,

1705

type_func=lambda x: x,

1706

variant_level=1,

1707

invalidate_only=False,

1708

_interface=_interface):

1234

def notifychangeproperty(transform_func,

1235

dbus_name, type_func=lambda x: x,

1236

variant_level=1):

1709

1237

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

1710

1238

its changes to DBus.

1711

1239

1717

1245

variant_level: D-Bus variant level. Default: 1

1718

1246

"""

1719

1247

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

1720

1721

1248

def setter(self, value):

1722

1249

if hasattr(self, "dbus_object_path"):

1723

1250

if (not hasattr(self, attrname) or

1724

1251

type_func(getattr(self, attrname, None))

1725

1252

!= type_func(value)):

1726

if invalidate_only:

1727

self.PropertiesChanged(

1728

_interface, dbus.Dictionary(),

1729

dbus.Array((dbus_name, )))

1730

else:

1731

dbus_value = transform_func(

1732

type_func(value),

1733

variant_level = variant_level)

1734

self.PropertyChanged(dbus.String(dbus_name),

1735

dbus_value)

1736

self.PropertiesChanged(

1737

_interface,

1738

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

1739

dbus_value }),

1740

dbus.Array())

1253

dbus_value = transform_func(type_func(value),

1254

variant_level

1255

=variant_level)

1256

self.PropertyChanged(dbus.String(dbus_name),

1257

dbus_value)

1741

1258

setattr(self, attrname, value)

1742

1259

1743

1260

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

1749

1266

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

1750

1267

last_enabled = notifychangeproperty(datetime_to_dbus,

1751

1268

"LastEnabled")

1752

checker = notifychangeproperty(

1753

dbus.Boolean, "CheckerRunning",

1754

type_func = lambda checker: checker is not None)

1269

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

1270

type_func = lambda checker:

1271

checker is not None)

1755

1272

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1756

1273

"LastCheckedOK")

1757

1274

last_checker_status = notifychangeproperty(dbus.Int16,

1760

1277

datetime_to_dbus, "LastApprovalRequest")

1761

1278

approved_by_default = notifychangeproperty(dbus.Boolean,

1762

1279

"ApprovedByDefault")

1763

approval_delay = notifychangeproperty(

1764

dbus.UInt64, "ApprovalDelay",

1765

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

1280

approval_delay = notifychangeproperty(dbus.UInt64,

1281

"ApprovalDelay",

1282

type_func =

1283

lambda td: td.total_seconds()

1284

* 1000)

1766

1285

approval_duration = notifychangeproperty(

1767

1286

dbus.UInt64, "ApprovalDuration",

1768

1287

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

1769

1288

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

1770

timeout = notifychangeproperty(

1771

dbus.UInt64, "Timeout",

1772

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

1289

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

1290

type_func = lambda td:

1291

td.total_seconds() * 1000)

1773

1292

extended_timeout = notifychangeproperty(

1774

1293

dbus.UInt64, "ExtendedTimeout",

1775

1294

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

1776

interval = notifychangeproperty(

1777

dbus.UInt64, "Interval",

1778

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

1295

interval = notifychangeproperty(dbus.UInt64,

1296

"Interval",

1297

type_func =

1298

lambda td: td.total_seconds()

1299

* 1000)

1779

1300

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

1780

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

1781

invalidate_only=True)

1782

1301

1783

1302

del notifychangeproperty

1784

1303

1791

1310

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

1792

1311

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

1793

1312

1794

def checker_callback(self, source, condition,

1795

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

1796

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

1797

connection, command, *args,

1798

**kwargs)

1799

exitstatus = self.last_checker_status

1800

if exitstatus >= 0:

1313

def checker_callback(self, pid, condition, command,

1314

*args, **kwargs):

1315

self.checker_callback_tag = None

1316

self.checker = None

1317

if os.WIFEXITED(condition):

1318

exitstatus = os.WEXITSTATUS(condition)

1801

1319

# Emit D-Bus signal

1802

1320

self.CheckerCompleted(dbus.Int16(exitstatus),

1803

# This is specific to GNU libC

1804

dbus.Int64(exitstatus << 8),

1321

dbus.Int64(condition),

1805

1322

dbus.String(command))

1806

1323

else:

1807

1324

# Emit D-Bus signal

1808

1325

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

1809

dbus.Int64(

1810

# This is specific to GNU libC

1811

(exitstatus << 8)

1812

| self.last_checker_signal),

1326

dbus.Int64(condition),

1813

1327

dbus.String(command))

1814

return ret

1328

1329

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

1330

*args, **kwargs)

1815

1331

1816

1332

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

1817

1333

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

1829

1345

1830

1346

def approve(self, value=True):

1831

1347

self.approved = value

1832

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

1833

* 1000), self._reset_approved)

1348

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

1349

* 1000), self._reset_approved)

1834

1350

self.send_changedstate()

1835

1351

1836

1352

## D-Bus methods, signals & properties

1353

_interface = "se.recompile.Mandos.Client"

1837

1354

1838

1355

## Interfaces

1839

1356

1357

@dbus_interface_annotations(_interface)

1358

def _foo(self):

1359

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

1360

"false"}

1361

1840

1362

## Signals

1841

1363

1842

1364

# CheckerCompleted - signal

1852

1374

pass

1853

1375

1854

1376

# PropertyChanged - signal

1855

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

1856

1377

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

1857

1378

def PropertyChanged(self, property, value):

1858

1379

"D-Bus signal"

1892

1413

self.checked_ok()

1893

1414

1894

1415

# Enable - method

1895

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

1896

1416

@dbus.service.method(_interface)

1897

1417

def Enable(self):

1898

1418

"D-Bus method"

1899

1419

self.enable()

1900

1420

1901

1421

# StartChecker - method

1902

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

1903

1422

@dbus.service.method(_interface)

1904

1423

def StartChecker(self):

1905

1424

"D-Bus method"

1906

1425

self.start_checker()

1907

1426

1908

1427

# Disable - method

1909

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

1910

1428

@dbus.service.method(_interface)

1911

1429

def Disable(self):

1912

1430

"D-Bus method"

1913

1431

self.disable()

1914

1432

1915

1433

# StopChecker - method

1916

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

1917

1434

@dbus.service.method(_interface)

1918

1435

def StopChecker(self):

1919

1436

self.stop_checker()

1926

1443

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

1927

1444

1928

1445

# ApprovedByDefault - property

1929

@dbus_service_property(_interface,

1930

signature="b",

1446

@dbus_service_property(_interface, signature="b",

1931

1447

access="readwrite")

1932

1448

def ApprovedByDefault_dbus_property(self, value=None):

1933

1449

if value is None: # get

1935

1451

self.approved_by_default = bool(value)

1936

1452

1937

1453

# ApprovalDelay - property

1938

@dbus_service_property(_interface,

1939

signature="t",

1454

@dbus_service_property(_interface, signature="t",

1940

1455

access="readwrite")

1941

1456

def ApprovalDelay_dbus_property(self, value=None):

1942

1457

if value is None: # get

1945

1460

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

1946

1461

1947

1462

# ApprovalDuration - property

1948

@dbus_service_property(_interface,

1949

signature="t",

1463

@dbus_service_property(_interface, signature="t",

1950

1464

access="readwrite")

1951

1465

def ApprovalDuration_dbus_property(self, value=None):

1952

1466

if value is None: # get

1955

1469

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

1956

1470

1957

1471

# Name - property

1958

@dbus_annotations(

1959

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1960

1472

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

1961

1473

def Name_dbus_property(self):

1962

1474

return dbus.String(self.name)

1963

1475

1964

1476

# Fingerprint - property

1965

@dbus_annotations(

1966

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1967

1477

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

1968

1478

def Fingerprint_dbus_property(self):

1969

1479

return dbus.String(self.fingerprint)

1970

1480

1971

1481

# Host - property

1972

@dbus_service_property(_interface,

1973

signature="s",

1482

@dbus_service_property(_interface, signature="s",

1974

1483

access="readwrite")

1975

1484

def Host_dbus_property(self, value=None):

1976

1485

if value is None: # get

1977

1486

return dbus.String(self.host)

1978

self.host = str(value)

1487

self.host = unicode(value)

1979

1488

1980

1489

# Created - property

1981

@dbus_annotations(

1982

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const"})

1983

1490

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

1984

1491

def Created_dbus_property(self):

1985

1492

return datetime_to_dbus(self.created)

1990

1497

return datetime_to_dbus(self.last_enabled)

1991

1498

1992

1499

# Enabled - property

1993

@dbus_service_property(_interface,

1994

signature="b",

1500

@dbus_service_property(_interface, signature="b",

1995

1501

access="readwrite")

1996

1502

def Enabled_dbus_property(self, value=None):

1997

1503

if value is None: # get

2002

1508

self.disable()

2003

1509

2004

1510

# LastCheckedOK - property

2005

@dbus_service_property(_interface,

2006

signature="s",

1511

@dbus_service_property(_interface, signature="s",

2007

1512

access="readwrite")

2008

1513

def LastCheckedOK_dbus_property(self, value=None):

2009

1514

if value is not None:

2012

1517

return datetime_to_dbus(self.last_checked_ok)

2013

1518

2014

1519

# LastCheckerStatus - property

2015

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

1520

@dbus_service_property(_interface, signature="n",

1521

access="read")

2016

1522

def LastCheckerStatus_dbus_property(self):

2017

1523

return dbus.Int16(self.last_checker_status)

2018

1524

2027

1533

return datetime_to_dbus(self.last_approval_request)

2028

1534

2029

1535

# Timeout - property

2030

@dbus_service_property(_interface,

2031

signature="t",

1536

@dbus_service_property(_interface, signature="t",

2032

1537

access="readwrite")

2033

1538

def Timeout_dbus_property(self, value=None):

2034

1539

if value is None: # get

2046

1551

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

2047

1552

is None):

2048

1553

return

2049

GLib.source_remove(self.disable_initiator_tag)

2050

self.disable_initiator_tag = GLib.timeout_add(

2051

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

2052

self.disable)

1554

gobject.source_remove(self.disable_initiator_tag)

1555

self.disable_initiator_tag = (

1556

gobject.timeout_add(

1557

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

1558

* 1000), self.disable))

2053

1559

2054

1560

# ExtendedTimeout - property

2055

@dbus_service_property(_interface,

2056

signature="t",

1561

@dbus_service_property(_interface, signature="t",

2057

1562

access="readwrite")

2058

1563

def ExtendedTimeout_dbus_property(self, value=None):

2059

1564

if value is None: # get

2062

1567

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

2063

1568

2064

1569

# Interval - property

2065

@dbus_service_property(_interface,

2066

signature="t",

1570

@dbus_service_property(_interface, signature="t",

2067

1571

access="readwrite")

2068

1572

def Interval_dbus_property(self, value=None):

2069

1573

if value is None: # get

2073

1577

return

2074

1578

if self.enabled:

2075

1579

# Reschedule checker run

2076

GLib.source_remove(self.checker_initiator_tag)

2077

self.checker_initiator_tag = GLib.timeout_add(

2078

value, self.start_checker)

2079

self.start_checker() # Start one now, too

1580

gobject.source_remove(self.checker_initiator_tag)

1581

self.checker_initiator_tag = (gobject.timeout_add

1582

(value, self.start_checker))

1583

self.start_checker() # Start one now, too

2080

1584

2081

1585

# Checker - property

2082

@dbus_service_property(_interface,

2083

signature="s",

1586

@dbus_service_property(_interface, signature="s",

2084

1587

access="readwrite")

2085

1588

def Checker_dbus_property(self, value=None):

2086

1589

if value is None: # get

2087

1590

return dbus.String(self.checker_command)

2088

self.checker_command = str(value)

1591

self.checker_command = unicode(value)

2089

1592

2090

1593

# CheckerRunning - property

2091

@dbus_service_property(_interface,

2092

signature="b",

1594

@dbus_service_property(_interface, signature="b",

2093

1595

access="readwrite")

2094

1596

def CheckerRunning_dbus_property(self, value=None):

2095

1597

if value is None: # get

2100

1602

self.stop_checker()

2101

1603

2102

1604

# ObjectPath - property

2103

@dbus_annotations(

2104

{"org.freedesktop.DBus.Property.EmitsChangedSignal": "const",

2105

"org.freedesktop.DBus.Deprecated": "true"})

2106

1605

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

2107

1606

def ObjectPath_dbus_property(self):

2108

1607

return self.dbus_object_path # is already a dbus.ObjectPath

2109

1608

2110

1609

# Secret = property

2111

@dbus_annotations(

2112

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

2113

"invalidates"})

2114

@dbus_service_property(_interface,

2115

signature="ay",

2116

access="write",

2117

byte_arrays=True)

1610

@dbus_service_property(_interface, signature="ay",

1611

access="write", byte_arrays=True)

2118

1612

def Secret_dbus_property(self, value):

2119

1613

self.secret = bytes(value)

2120

1614

2126

1620

self._pipe = child_pipe

2127

1621

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

2128

1622

if not self._pipe.recv():

2129

raise KeyError(fpr)

1623

raise KeyError()

2130

1624

2131

1625

def __getattribute__(self, name):

2132

1626

if name == '_pipe':

2136

1630

if data[0] == 'data':

2137

1631

return data[1]

2138

1632

if data[0] == 'function':

2139

2140

1633

def func(*args, **kwargs):

2141

1634

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

2142

1635

return self._pipe.recv()[1]

2143

2144

1636

return func

2145

1637

2146

1638

def __setattr__(self, name, value):

2158

1650

def handle(self):

2159

1651

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

2160

1652

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

2161

str(self.client_address))

1653

unicode(self.client_address))

2162

1654

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

2163

1655

self.server.child_pipe.fileno())

2164

1656

2165

session = gnutls.ClientSession(self.request)

1657

session = (gnutls.connection

1658

.ClientSession(self.request,

1659

gnutls.connection

1660

.X509Credentials()))

1661

1662

# Note: gnutls.connection.X509Credentials is really a

1663

# generic GnuTLS certificate credentials object so long as

1664

# no X.509 keys are added to it. Therefore, we can use it

1665

# here despite using OpenPGP certificates.

2166

1666

2167

1667

#priority = ':'.join(("NONE", "+VERS-TLS1.1",

2168

1668

# "+AES-256-CBC", "+SHA1",

2172

1672

priority = self.server.gnutls_priority

2173

1673

if priority is None:

2174

1674

priority = "NORMAL"

2175

gnutls.priority_set_direct(session._c_object, priority,

2176

None)

1675

(gnutls.library.functions

1676

.gnutls_priority_set_direct(session._c_object,

1677

priority, None))

2177

1678

2178

1679

# Start communication using the Mandos protocol

2179

1680

# Get protocol number

2189

1690

# Start GnuTLS connection

2190

1691

try:

2191

1692

session.handshake()

2192

except gnutls.Error as error:

1693

except gnutls.errors.GNUTLSError as error:

2193

1694

logger.warning("Handshake failed: %s", error)

2194

1695

# Do not run session.bye() here: the session is not

2195

1696

# established. Just abandon the request.

2199

1700

approval_required = False

2200

1701

try:

2201

1702

try:

2202

fpr = self.fingerprint(

2203

self.peer_certificate(session))

2204

except (TypeError, gnutls.Error) as error:

1703

fpr = self.fingerprint(self.peer_certificate

1704

(session))

1705

except (TypeError,

1706

gnutls.errors.GNUTLSError) as error:

2205

1707

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

2206

1708

return

2207

1709

logger.debug("Fingerprint: %s", fpr)

2220

1722

while True:

2221

1723

if not client.enabled:

2222

1724

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

2223

client.name)

1725

client.name)

2224

1726

if self.server.use_dbus:

2225

1727

# Emit D-Bus signal

2226

1728

client.Rejected("Disabled")

2265

1767

else:

2266

1768

delay -= time2 - time

2267

1769

2268

try:

2269

session.send(client.secret)

2270

except gnutls.Error as error:

2271

logger.warning("gnutls send failed",

2272

exc_info = error)

2273

return

1770

sent_size = 0

1771

while sent_size < len(client.secret):

1772

try:

1773

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

1774

except gnutls.errors.GNUTLSError as error:

1775

logger.warning("gnutls send failed",

1776

exc_info=error)

1777

return

1778

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

1779

sent, len(client.secret)

1780

- (sent_size + sent))

1781

sent_size += sent

2274

1782

2275

1783

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

2276

1784

# bump the timeout using extended_timeout

2284

1792

client.approvals_pending -= 1

2285

1793

try:

2286

1794

session.bye()

2287

except gnutls.Error as error:

1795

except gnutls.errors.GNUTLSError as error:

2288

1796

logger.warning("GnuTLS bye failed",

2289

1797

exc_info=error)

2290

1798

2292

1800

def peer_certificate(session):

2293

1801

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

2294

1802

# If not an OpenPGP certificate...

2295

if (gnutls.certificate_type_get(session._c_object)

2296

!= gnutls.CRT_OPENPGP):

2297

# ...return invalid data

2298

return b""

1803

if (gnutls.library.functions

1804

.gnutls_certificate_type_get(session._c_object)

1805

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1806

# ...do the normal thing

1807

return session.peer_certificate

2299

1808

list_size = ctypes.c_uint(1)

2300

cert_list = (gnutls.certificate_get_peers

1809

cert_list = (gnutls.library.functions

1810

.gnutls_certificate_get_peers

2301

1811

(session._c_object, ctypes.byref(list_size)))

2302

1812

if not bool(cert_list) and list_size.value != 0:

2303

raise gnutls.Error("error getting peer certificate")

1813

raise gnutls.errors.GNUTLSError("error getting peer"

1814

" certificate")

2304

1815

if list_size.value == 0:

2305

1816

return None

2306

1817

cert = cert_list[0]

2310

1821

def fingerprint(openpgp):

2311

1822

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2312

1823

# New GnuTLS "datum" with the OpenPGP public key

2313

datum = gnutls.datum_t(

2314

ctypes.cast(ctypes.c_char_p(openpgp),

2315

ctypes.POINTER(ctypes.c_ubyte)),

2316

ctypes.c_uint(len(openpgp)))

1824

datum = (gnutls.library.types

1825

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

1826

ctypes.POINTER

1827

(ctypes.c_ubyte)),

1828

ctypes.c_uint(len(openpgp))))

2317

1829

# New empty GnuTLS certificate

2318

crt = gnutls.openpgp_crt_t()

2319

gnutls.openpgp_crt_init(ctypes.byref(crt))

1830

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1831

(gnutls.library.functions

1832

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2320

1833

# Import the OpenPGP public key into the certificate

2321

gnutls.openpgp_crt_import(crt, ctypes.byref(datum),

2322

gnutls.OPENPGP_FMT_RAW)

1834

(gnutls.library.functions

1835

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

1836

gnutls.library.constants

1837

.GNUTLS_OPENPGP_FMT_RAW))

2323

1838

# Verify the self signature in the key

2324

1839

crtverify = ctypes.c_uint()

2325

gnutls.openpgp_crt_verify_self(crt, 0,

2326

ctypes.byref(crtverify))

1840

(gnutls.library.functions

1841

.gnutls_openpgp_crt_verify_self(crt, 0,

1842

ctypes.byref(crtverify)))

2327

1843

if crtverify.value != 0:

2328

gnutls.openpgp_crt_deinit(crt)

2329

raise gnutls.CertificateSecurityError("Verify failed")

1844

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1845

raise (gnutls.errors.CertificateSecurityError

1846

("Verify failed"))

2330

1847

# New buffer for the fingerprint

2331

1848

buf = ctypes.create_string_buffer(20)

2332

1849

buf_len = ctypes.c_size_t()

2333

1850

# Get the fingerprint from the certificate into the buffer

2334

gnutls.openpgp_crt_get_fingerprint(crt, ctypes.byref(buf),

2335

ctypes.byref(buf_len))

1851

(gnutls.library.functions

1852

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

1853

ctypes.byref(buf_len)))

2336

1854

# Deinit the certificate

2337

gnutls.openpgp_crt_deinit(crt)

1855

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2338

1856

# Convert the buffer to a Python bytestring

2339

1857

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

2340

1858

# Convert the bytestring to hexadecimal notation

2344

1862

2345

1863

class MultiprocessingMixIn(object):

2346

1864

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

2347

2348

1865

def sub_process_main(self, request, address):

2349

1866

try:

2350

1867

self.finish_request(request, address)

2362

1879

2363

1880

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2364

1881

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

2365

2366

1882

def process_request(self, request, client_address):

2367

1883

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

2368

1884

2389

1905

interface: None or a network interface name (string)

2390

1906

use_ipv6: Boolean; to use IPv6 or not

2391

1907

"""

2392

2393

1908

def __init__(self, server_address, RequestHandlerClass,

2394

interface=None,

2395

use_ipv6=True,

2396

socketfd=None):

1909

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

2397

1910

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

2398

1911

creating a new one with socket.socket().

2399

1912

"""

2440

1953

self.interface)

2441

1954

else:

2442

1955

try:

2443

self.socket.setsockopt(

2444

socket.SOL_SOCKET, SO_BINDTODEVICE,

2445

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

1956

self.socket.setsockopt(socket.SOL_SOCKET,

1957

SO_BINDTODEVICE,

1958

(self.interface + "\0")

1959

.encode("utf-8"))

2446

1960

except socket.error as error:

2447

1961

if error.errno == errno.EPERM:

2448

1962

logger.error("No permission to bind to"

2466

1980

self.server_address = (any_address,

2467

1981

self.server_address[1])

2468

1982

elif not self.server_address[1]:

2469

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

1983

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

1984

0)

2470

1985

# if self.interface:

2471

1986

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

2472

1987

# 0, # port

2484

1999

gnutls_priority GnuTLS priority string

2485

2000

use_dbus: Boolean; to emit D-Bus signals or not

2486

2001

2487

Assumes a GLib.MainLoop event loop.

2002

Assumes a gobject.MainLoop event loop.

2488

2003

"""

2489

2490

2004

def __init__(self, server_address, RequestHandlerClass,

2491

interface=None,

2492

use_ipv6=True,

2493

clients=None,

2494

gnutls_priority=None,

2495

use_dbus=True,

2496

socketfd=None):

2005

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

2006

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

2497

2007

self.enabled = False

2498

2008

self.clients = clients

2499

2009

if self.clients is None:

2505

2015

interface = interface,

2506

2016

use_ipv6 = use_ipv6,

2507

2017

socketfd = socketfd)

2508

2509

2018

def server_activate(self):

2510

2019

if self.enabled:

2511

2020

return socketserver.TCPServer.server_activate(self)

2515

2024

2516

2025

def add_pipe(self, parent_pipe, proc):

2517

2026

# Call "handle_ipc" for both data and EOF events

2518

GLib.io_add_watch(

2519

parent_pipe.fileno(),

2520

GLib.IO_IN | GLib.IO_HUP,

2521

functools.partial(self.handle_ipc,

2522

parent_pipe = parent_pipe,

2523

proc = proc))

2027

gobject.io_add_watch(parent_pipe.fileno(),

2028

gobject.IO_IN | gobject.IO_HUP,

2029

functools.partial(self.handle_ipc,

2030

parent_pipe =

2031

parent_pipe,

2032

proc = proc))

2524

2033

2525

def handle_ipc(self, source, condition,

2526

parent_pipe=None,

2527

proc = None,

2528

client_object=None):

2034

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

2035

proc = None, client_object=None):

2529

2036

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

2530

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

2037

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

2531

2038

# Wait for other process to exit

2532

2039

proc.join()

2533

2040

return False

2540

2047

fpr = request[1]

2541

2048

address = request[2]

2542

2049

2543

for c in self.clients.values():

2050

for c in self.clients.itervalues():

2544

2051

if c.fingerprint == fpr:

2545

2052

client = c

2546

2053

break

2554

2061

parent_pipe.send(False)

2555

2062

return False

2556

2063

2557

GLib.io_add_watch(

2558

parent_pipe.fileno(),

2559

GLib.IO_IN | GLib.IO_HUP,

2560

functools.partial(self.handle_ipc,

2561

parent_pipe = parent_pipe,

2562

proc = proc,

2563

client_object = client))

2064

gobject.io_add_watch(parent_pipe.fileno(),

2065

gobject.IO_IN | gobject.IO_HUP,

2066

functools.partial(self.handle_ipc,

2067

parent_pipe =

2068

parent_pipe,

2069

proc = proc,

2070

client_object =

2071

client))

2564

2072

parent_pipe.send(True)

2565

2073

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

2566

2074

# same fileno

2572

2080

2573

2081

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

2574

2082

funcname)(*args,

2575

**kwargs)))

2083

**kwargs)))

2576

2084

2577

2085

if command == 'getattr':

2578

2086

attrname = request[1]

2579

if isinstance(client_object.__getattribute__(attrname),

2580

collections.Callable):

2581

parent_pipe.send(('function', ))

2087

if callable(client_object.__getattribute__(attrname)):

2088

parent_pipe.send(('function',))

2582

2089

else:

2583

parent_pipe.send((

2584

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

2090

parent_pipe.send(('data', client_object

2091

.__getattribute__(attrname)))

2585

2092

2586

2093

if command == 'setattr':

2587

2094

attrname = request[1]

2618

2125

# avoid excessive use of external libraries.

2619

2126

2620

2127

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

2621

Token = collections.namedtuple("Token", (

2622

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

2623

# a "group" containing digits

2624

"value", # datetime.timedelta or None

2625

"followers")) # Tokens valid after this token

2128

Token = collections.namedtuple("Token",

2129

("regexp", # To match token; if

2130

# "value" is not None,

2131

# must have a "group"

2132

# containing digits

2133

"value", # datetime.timedelta or

2134

# None

2135

"followers")) # Tokens valid after

2136

# this token

2626

2137

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

2627

2138

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

2628

2139

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

2629

2140

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

2630

2141

datetime.timedelta(seconds=1),

2631

frozenset((token_end, )))

2142

frozenset((token_end,)))

2632

2143

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

2633

2144

datetime.timedelta(minutes=1),

2634

2145

frozenset((token_second, token_end)))

2650

2161

frozenset((token_month, token_end)))

2651

2162

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

2652

2163

datetime.timedelta(weeks=1),

2653

frozenset((token_end, )))

2164

frozenset((token_end,)))

2654

2165

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

2655

2166

frozenset((token_year, token_month,

2656

2167

token_day, token_time,

2658

2169

# Define starting values

2659

2170

value = datetime.timedelta() # Value so far

2660

2171

found_token = None

2661

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

2172

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

2662

2173

s = duration # String left to parse

2663

2174

# Loop until end token is found

2664

2175

while found_token is not token_end:

2681

2192

break

2682

2193

else:

2683

2194

# No currently valid tokens were found

2684

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

2685

.format(duration))

2195

raise ValueError("Invalid RFC 3339 duration")

2686

2196

# End token found

2687

2197

return value

2688

2198

2725

2235

elif suffix == "w":

2726

2236

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

2727

2237

else:

2728

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

2238

raise ValueError("Unknown suffix {!r}"

2239

.format(suffix))

2729

2240

except IndexError as e:

2730

2241

raise ValueError(*(e.args))

2731

2242

timevalue += delta

2747

2258

# Close all standard open file descriptors

2748

2259

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

2749

2260

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

2750

raise OSError(errno.ENODEV,

2751

"{} not a character device"

2261

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

2752

2262

.format(os.devnull))

2753

2263

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

2754

2264

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

2820

2330

"port": "",

2821

2331

"debug": "False",

2822

2332

"priority":

2823

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

2824

":+SIGN-DSA-SHA256",

2333

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

2825

2334

"servicename": "Mandos",

2826

2335

"use_dbus": "True",

2827

2336

"use_ipv6": "True",

2831

2340

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

2832

2341

"foreground": "False",

2833

2342

"zeroconf": "True",

2834

}

2343

}

2835

2344

2836

2345

# Parse config file for server-global settings

2837

2346

server_config = configparser.SafeConfigParser(server_defaults)

2838

2347

del server_defaults

2839

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

2348

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

2349

"mandos.conf"))

2840

2350

# Convert the SafeConfigParser object to a dict

2841

2351

server_settings = server_config.defaults()

2842

2352

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

2860

2370

# Override the settings from the config file with command line

2861

2371

# options, if set.

2862

2372

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

2863

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

2864

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

2865

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

2373

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

2374

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

2375

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

2866

2376

value = getattr(options, option)

2867

2377

if value is not None:

2868

2378

server_settings[option] = value

2883

2393

2884

2394

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

2885

2395

2886

if (not server_settings["zeroconf"]

2887

and not (server_settings["port"]

2888

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

2889

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

2396

if (not server_settings["zeroconf"] and

2397

not (server_settings["port"]

2398

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

2399

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

2400

" Zeroconf")

2890

2401

2891

2402

# For convenience

2892

2403

debug = server_settings["debug"]

2908

2419

initlogger(debug, level)

2909

2420

2910

2421

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

2911

syslogger.setFormatter(

2912

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

2913

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

2914

server_settings["servicename"])))

2422

syslogger.setFormatter(logging.Formatter

2423

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

2424

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

2425

.format(server_settings

2426

["servicename"])))

2915

2427

2916

2428

# Parse config file with clients

2917

2429

client_config = configparser.SafeConfigParser(Client

2925

2437

socketfd = None

2926

2438

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

2927

2439

socketfd = server_settings["socket"]

2928

tcp_server = MandosServer(

2929

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

2930

ClientHandler,

2931

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

2932

use_ipv6=use_ipv6,

2933

gnutls_priority=server_settings["priority"],

2934

use_dbus=use_dbus,

2935

socketfd=socketfd)

2440

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

2441

server_settings["port"]),

2442

ClientHandler,

2443

interface=(server_settings["interface"]

2444

or None),

2445

use_ipv6=use_ipv6,

2446

gnutls_priority=

2447

server_settings["priority"],

2448

use_dbus=use_dbus,

2449

socketfd=socketfd)

2936

2450

if not foreground:

2937

2451

pidfilename = "/run/mandos.pid"

2938

2452

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

2939

2453

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

2940

2454

pidfile = None

2941

2455

try:

2942

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

2456

pidfile = open(pidfilename, "w")

2943

2457

except IOError as e:

2944

2458

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

2945

2459

exc_info=e)

2946

2460

2947

for name, group in (("_mandos", "_mandos"),

2948

("mandos", "mandos"),

2949

("nobody", "nogroup")):

2461

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

2950

2462

try:

2951

2463

uid = pwd.getpwnam(name).pw_uid

2952

gid = pwd.getpwnam(group).pw_gid

2464

gid = pwd.getpwnam(name).pw_gid

2953

2465

break

2954

2466

except KeyError:

2955

2467

continue

2959

2471

try:

2960

2472

os.setgid(gid)

2961

2473

os.setuid(uid)

2962

if debug:

2963

logger.debug("Did setuid/setgid to {}:{}".format(uid,

2964

gid))

2965

2474

except OSError as error:

2966

logger.warning("Failed to setuid/setgid to {}:{}: {}"

2967

.format(uid, gid, os.strerror(error.errno)))

2968

2475

if error.errno != errno.EPERM:

2969

2476

raise

2970

2477

2973

2480

2974

2481

# "Use a log level over 10 to enable all debugging options."

2975

2482

# - GnuTLS manual

2976

gnutls.global_set_log_level(11)

2483

gnutls.library.functions.gnutls_global_set_log_level(11)

2977

2484

2978

@gnutls.log_func

2485

@gnutls.library.types.gnutls_log_func

2979

2486

def debug_gnutls(level, string):

2980

2487

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

2981

2488

2982

gnutls.global_set_log_function(debug_gnutls)

2489

(gnutls.library.functions

2490

.gnutls_global_set_log_function(debug_gnutls))

2983

2491

2984

2492

# Redirect stdin so all checkers get /dev/null

2985

2493

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

2992

2500

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

2993

2501

daemon()

2994

2502

2995

# multiprocessing will use threads, so before we use GLib we need

2996

# to inform GLib that threads will be used.

2997

GLib.threads_init()

2503

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

2504

# need to inform gobject that threads will be used.

2505

gobject.threads_init()

2998

2506

2999

2507

global main_loop

3000

2508

# From the Avahi example code

3001

2509

DBusGMainLoop(set_as_default=True)

3002

main_loop = GLib.MainLoop()

2510

main_loop = gobject.MainLoop()

3003

2511

bus = dbus.SystemBus()

3004

2512

# End of Avahi example code

3005

2513

if use_dbus:

3006

2514

try:

3007

2515

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

3008

bus,

3009

do_not_queue=True)

3010

old_bus_name = dbus.service.BusName(

3011

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

3012

do_not_queue=True)

3013

except dbus.exceptions.DBusException as e:

2516

bus, do_not_queue=True)

2517

old_bus_name = (dbus.service.BusName

2518

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

2519

do_not_queue=True))

2520

except dbus.exceptions.NameExistsException as e:

3014

2521

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

3015

2522

use_dbus = False

3016

2523

server_settings["use_dbus"] = False

3017

2524

tcp_server.use_dbus = False

3018

2525

if zeroconf:

3019

2526

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3020

service = AvahiServiceToSyslog(

3021

name = server_settings["servicename"],

3022

servicetype = "_mandos._tcp",

3023

protocol = protocol,

3024

bus = bus)

2527

service = AvahiServiceToSyslog(name =

2528

server_settings["servicename"],

2529

servicetype = "_mandos._tcp",

2530

protocol = protocol, bus = bus)

3025

2531

if server_settings["interface"]:

3026

service.interface = if_nametoindex(

3027

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

2532

service.interface = (if_nametoindex

2533

(server_settings["interface"]

2534

.encode("utf-8")))

3028

2535

3029

2536

global multiprocessing_manager

3030

2537

multiprocessing_manager = multiprocessing.Manager()

3049

2556

if server_settings["restore"]:

3050

2557

try:

3051

2558

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

3052

if sys.version_info.major == 2:

3053

clients_data, old_client_settings = pickle.load(

3054

stored_state)

3055

else:

3056

bytes_clients_data, bytes_old_client_settings = (

3057

pickle.load(stored_state, encoding = "bytes"))

3058

### Fix bytes to strings

3059

## clients_data

3060

# .keys()

3061

clients_data = { (key.decode("utf-8")

3062

if isinstance(key, bytes)

3063

else key): value

3064

for key, value in

3065

bytes_clients_data.items() }

3066

del bytes_clients_data

3067

for key in clients_data:

3068

value = { (k.decode("utf-8")

3069

if isinstance(k, bytes) else k): v

3070

for k, v in

3071

clients_data[key].items() }

3072

clients_data[key] = value

3073

# .client_structure

3074

value["client_structure"] = [

3075

(s.decode("utf-8")

3076

if isinstance(s, bytes)

3077

else s) for s in

3078

value["client_structure"] ]

3079

# .name & .host

3080

for k in ("name", "host"):

3081

if isinstance(value[k], bytes):

3082

value[k] = value[k].decode("utf-8")

3083

## old_client_settings

3084

# .keys()

3085

old_client_settings = {

3086

(key.decode("utf-8")

3087

if isinstance(key, bytes)

3088

else key): value

3089

for key, value in

3090

bytes_old_client_settings.items() }

3091

del bytes_old_client_settings

3092

# .host

3093

for value in old_client_settings.values():

3094

if isinstance(value["host"], bytes):

3095

value["host"] = (value["host"]

3096

.decode("utf-8"))

2559

clients_data, old_client_settings = (pickle.load

2560

(stored_state))

3097

2561

os.remove(stored_state_path)

3098

2562

except IOError as e:

3099

2563

if e.errno == errno.ENOENT:

3100

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

3101

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

2564

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

2565

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

3102

2566

else:

3103

2567

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

3104

2568

exc_info=e)

3105

2569

raise

3106

2570

except EOFError as e:

3107

2571

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

3108

"EOFError:",

3109

exc_info=e)

2572

"EOFError:", exc_info=e)

3110

2573

3111

2574

with PGPEngine() as pgp:

3112

2575

for client_name, client in clients_data.items():

3124

2587

# For each value in new config, check if it

3125

2588

# differs from the old config value (Except for

3126

2589

# the "secret" attribute)

3127

if (name != "secret"

3128

and (value !=

3129

old_client_settings[client_name][name])):

2590

if (name != "secret" and

2591

value != old_client_settings[client_name]

2592

[name]):

3130

2593

client[name] = value

3131

2594

except KeyError:

3132

2595

pass

3133

2596

3134

2597

# Clients who has passed its expire date can still be

3135

# enabled if its last checker was successful. A Client

2598

# enabled if its last checker was successful. Clients

3136

2599

# whose checker succeeded before we stored its state is

3137

2600

# assumed to have successfully run all checkers during

3138

2601

# downtime.

3141

2604

if not client["last_checked_ok"]:

3142

2605

logger.warning(

3143

2606

"disabling client {} - Client never "

3144

"performed a successful checker".format(

3145

client_name))

2607

"performed a successful checker"

2608

.format(client_name))

3146

2609

client["enabled"] = False

3147

2610

elif client["last_checker_status"] != 0:

3148

2611

logger.warning(

3149

2612

"disabling client {} - Client last"

3150

" checker failed with error code"

3151

" {}".format(

3152

client_name,

3153

client["last_checker_status"]))

2613

" checker failed with error code {}"

2614

.format(client_name,

2615

client["last_checker_status"]))

3154

2616

client["enabled"] = False

3155

2617

else:

3156

client["expires"] = (

3157

datetime.datetime.utcnow()

3158

+ client["timeout"])

2618

client["expires"] = (datetime.datetime

2619

.utcnow()

2620

+ client["timeout"])

3159

2621

logger.debug("Last checker succeeded,"

3160

" keeping {} enabled".format(

3161

client_name))

2622

" keeping {} enabled"

2623

.format(client_name))

3162

2624

try:

3163

client["secret"] = pgp.decrypt(

3164

client["encrypted_secret"],

3165

client_settings[client_name]["secret"])

2625

client["secret"] = (

2626

pgp.decrypt(client["encrypted_secret"],

2627

client_settings[client_name]

2628

["secret"]))

3166

2629

except PGPError:

3167

2630

# If decryption fails, we use secret from new settings

3168

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

3169

client_name))

3170

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

3171

["secret"])

2631

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

2632

.format(client_name))

2633

client["secret"] = (

2634

client_settings[client_name]["secret"])

3172

2635

3173

2636

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

3174

2637

for client_name in (set(old_client_settings)

3181

2644

# Create all client objects

3182

2645

for client_name, client in clients_data.items():

3183

2646

tcp_server.clients[client_name] = client_class(

3184

name = client_name,

3185

settings = client,

2647

name = client_name, settings = client,

3186

2648

server_settings = server_settings)

3187

2649

3188

2650

if not tcp_server.clients:

3190

2652

3191

2653

if not foreground:

3192

2654

if pidfile is not None:

3193

pid = os.getpid()

3194

2655

try:

3195

2656

with pidfile:

3196

print(pid, file=pidfile)

2657

pid = os.getpid()

2658

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

3197

2659

except IOError:

3198

2660

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

3199

2661

pidfilename, pid)

3200

2662

del pidfile

3201

2663

del pidfilename

3202

2664

3203

for termsig in (signal.SIGHUP, signal.SIGTERM):

3204

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3205

lambda: main_loop.quit() and False)

2665

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

2666

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

3206

2667

3207

2668

if use_dbus:

3208

3209

@alternate_dbus_interfaces(

3210

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

3211

class MandosDBusService(DBusObjectWithObjectManager):

2669

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

2670

"se.bsnet.fukt.Mandos"})

2671

class MandosDBusService(DBusObjectWithProperties):

3212

2672

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

3213

3214

2673

def __init__(self):

3215

2674

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

3216

3217

2675

_interface = "se.recompile.Mandos"

3218

2676

2677

@dbus_interface_annotations(_interface)

2678

def _foo(self):

2679

return { "org.freedesktop.DBus.Property"

2680

".EmitsChangedSignal":

2681

"false"}

2682

3219

2683

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

3220

2684

def ClientAdded(self, objpath):

3221

2685

"D-Bus signal"

3226

2690

"D-Bus signal"

3227

2691

pass

3228

2692

3229

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

3230

"true"})

3231

2693

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

3232

2694

def ClientRemoved(self, objpath, name):

3233

2695

"D-Bus signal"

3234

2696

pass

3235

2697

3236

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

3237

"true"})

3238

2698

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

3239

2699

def GetAllClients(self):

3240

2700

"D-Bus method"

3241

return dbus.Array(c.dbus_object_path for c in

3242

tcp_server.clients.values())

2701

return dbus.Array(c.dbus_object_path

2702

for c in

2703

tcp_server.clients.itervalues())

3243

2704

3244

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

3245

"true"})

3246

2705

@dbus.service.method(_interface,

3247

2706

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

3248

2707

def GetAllClientsWithProperties(self):

3249

2708

"D-Bus method"

3250

2709

return dbus.Dictionary(

3251

{ c.dbus_object_path: c.GetAll(

3252

"se.recompile.Mandos.Client")

3253

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

2710

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

2711

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

3254

2712

signature="oa{sv}")

3255

2713

3256

2714

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

3257

2715

def RemoveClient(self, object_path):

3258

2716

"D-Bus method"

3259

for c in tcp_server.clients.values():

2717

for c in tcp_server.clients.itervalues():

3260

2718

if c.dbus_object_path == object_path:

3261

2719

del tcp_server.clients[c.name]

3262

2720

c.remove_from_connection()

3263

# Don't signal the disabling

2721

# Don't signal anything except ClientRemoved

3264

2722

c.disable(quiet=True)

3265

# Emit D-Bus signal for removal

3266

self.client_removed_signal(c)

2723

# Emit D-Bus signal

2724

self.ClientRemoved(object_path, c.name)

3267

2725

return

3268

2726

raise KeyError(object_path)

3269

2727

3270

2728

del _interface

3271

3272

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3273

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

3274

def GetManagedObjects(self):

3275

"""D-Bus method"""

3276

return dbus.Dictionary(

3277

{ client.dbus_object_path:

3278

dbus.Dictionary(

3279

{ interface: client.GetAll(interface)

3280

for interface in

3281

client._get_all_interface_names()})

3282

for client in tcp_server.clients.values()})

3283

3284

def client_added_signal(self, client):

3285

"""Send the new standard signal and the old signal"""

3286

if use_dbus:

3287

# New standard signal

3288

self.InterfacesAdded(

3289

client.dbus_object_path,

3290

dbus.Dictionary(

3291

{ interface: client.GetAll(interface)

3292

for interface in

3293

client._get_all_interface_names()}))

3294

# Old signal

3295

self.ClientAdded(client.dbus_object_path)

3296

3297

def client_removed_signal(self, client):

3298

"""Send the new standard signal and the old signal"""

3299

if use_dbus:

3300

# New standard signal

3301

self.InterfacesRemoved(

3302

client.dbus_object_path,

3303

client._get_all_interface_names())

3304

# Old signal

3305

self.ClientRemoved(client.dbus_object_path,

3306

client.name)

3307

2729

3308

2730

mandos_dbus_service = MandosDBusService()

3309

2731

3322

2744

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

3323

2745

clients = {}

3324

2746

with PGPEngine() as pgp:

3325

for client in tcp_server.clients.values():

2747

for client in tcp_server.clients.itervalues():

3326

2748

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

3327

2749

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

3328

2750

key)

3332

2754

# + secret.

3333

2755

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

3334

2756

"checker", "server_settings" }

3335

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

3336

.Object):

2757

for name, typ in (inspect.getmembers

2758

(dbus.service.Object)):

3337

2759

exclude.add(name)

3338

2760

3339

2761

client_dict["encrypted_secret"] = (client

3346

2768

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

3347

2769

3348

2770

try:

3349

with tempfile.NamedTemporaryFile(

3350

mode='wb',

3351

suffix=".pickle",

3352

prefix='clients-',

3353

dir=os.path.dirname(stored_state_path),

3354

delete=False) as stored_state:

3355

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

3356

protocol = 2)

3357

tempname = stored_state.name

2771

with (tempfile.NamedTemporaryFile

2772

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

2773

dir=os.path.dirname(stored_state_path),

2774

delete=False)) as stored_state:

2775

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

2776

tempname=stored_state.name

3358

2777

os.rename(tempname, stored_state_path)

3359

2778

except (IOError, OSError) as e:

3360

2779

if not debug:

3375

2794

name, client = tcp_server.clients.popitem()

3376

2795

if use_dbus:

3377

2796

client.remove_from_connection()

3378

# Don't signal the disabling

2797

# Don't signal anything except ClientRemoved

3379

2798

client.disable(quiet=True)

3380

# Emit D-Bus signal for removal

3381

2799

if use_dbus:

3382

mandos_dbus_service.client_removed_signal(client)

2800

# Emit D-Bus signal

2801

mandos_dbus_service.ClientRemoved(client

2802

.dbus_object_path,

2803

client.name)

3383

2804

client_settings.clear()

3384

2805

3385

2806

atexit.register(cleanup)

3386

2807

3387

for client in tcp_server.clients.values():

2808

for client in tcp_server.clients.itervalues():

3388

2809

if use_dbus:

3389

# Emit D-Bus signal for adding

3390

mandos_dbus_service.client_added_signal(client)

2810

# Emit D-Bus signal

2811

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3391

2812

# Need to initiate checking of clients

3392

2813

if client.enabled:

3393

2814

client.init_checker()

3419

2840

sys.exit(1)

3420

2841

# End of Avahi example code

3421

2842

3422

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

3423

lambda *args, **kwargs:

3424

(tcp_server.handle_request

3425

(*args[2:], **kwargs) or True))

2843

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

2844

lambda *args, **kwargs:

2845

(tcp_server.handle_request

2846

(*args[2:], **kwargs) or True))

3426

2847

3427

2848

logger.debug("Starting main loop")

3428

2849

main_loop.run()

3438

2859

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

3439

2860

cleanup()

3440

2861

3441

3442

2862

if __name__ == '__main__':

3443

2863

main()