/mandos/release : revision 237.7.392

1

#!/usr/bin/python2.7

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#!/usr/bin/python

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

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#

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

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

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#

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# Everything else is

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#

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

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

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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try:

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from future_builtins import *

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except ImportError:

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pass

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import SocketServer as socketserver

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import errno

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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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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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import cPickle as pickle

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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import gobject

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import avahi

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from gi.repository import GLib

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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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version = "1.6.8"

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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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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"))

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.if_nametoindex)

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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"Get an interface index the hard way, i.e. using fcntl()"

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SIOCGIFINDEX = 0x8933 # From /usr/include/linux/sockios.h

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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 =

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logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger = (logging.handlers.SysLogHandler(

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facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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class PGPEngine(object):

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"""A simple class for OpenPGP symmetric encryption & decryption"""

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def __init__(self):

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self.tempdir = tempfile.mkdtemp(prefix="mandos-")

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self.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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'--home', self.tempdir,

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'--homedir', 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(dir=self.tempdir

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) as passfile:

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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proc = subprocess.Popen([self.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(dir = self.tempdir

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) as passfile:

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with tempfile.NamedTemporaryFile(

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dir = self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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proc = subprocess.Popen([self.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

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= data)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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# Pretend that we have an Avahi module

257

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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315

"""

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316

256

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):

317

def __init__(self,

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interface = avahi.IF_UNSPEC,

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name = None,

320

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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328

self.interface = interface

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329

self.name = name

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330

self.type = servicetype

272

340

self.bus = bus

273

341

self.entry_group_state_changed_match = None

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342

275

def rename(self):

343

def rename(self, remove=True):

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

277

345

if self.rename_count >= self.max_renames:

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346

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

279

347

" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

282

self.name = unicode(self.server

283

.GetAlternativeServiceName(self.name))

350

self.name = str(

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self.server.GetAlternativeServiceName(self.name))

352

self.rename_count += 1

284

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

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354

self.name)

286

self.remove()

355

if remove:

356

self.remove()

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try:

288

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self.add()

289

359

except dbus.exceptions.DBusException as error:

290

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

291

self.cleanup()

292

os._exit(1)

293

self.rename_count += 1

360

if (error.get_dbus_name()

361

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

362

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

363

return self.rename(remove=False)

364

else:

365

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

366

self.cleanup()

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os._exit(1)

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368

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369

def remove(self):

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

334

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self.rename()

335

409

elif state == avahi.ENTRY_GROUP_FAILURE:

336

410

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

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unicode(error))

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

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.format(error))

411

str(error))

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

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413

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414

def cleanup(self):

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

352

425

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

353

426

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

354

427

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

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bad_states = { avahi.SERVER_INVALID:

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"Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION:

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"Zeroconf server name collision",

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avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

428

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",

433

}

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if state in bad_states:

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if bad_states[state] is not None:

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436

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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441

elif state == avahi.SERVER_RUNNING:

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self.add()

442

try:

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self.add()

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except dbus.exceptions.DBusException as error:

445

if (error.get_dbus_name()

446

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

447

logger.info("Local Zeroconf service name"

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" collision.")

449

return self.rename(remove=False)

450

else:

451

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

452

self.cleanup()

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os._exit(1)

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else:

372

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if error is None:

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456

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

383

466

follow_name_owner_changes=True),

384

467

avahi.DBUS_INTERFACE_SERVER)

385

468

self.server.connect_to_signal("StateChanged",

386

self.server_state_changed)

469

self.server_state_changed)

387

470

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

388

471

389

472

390

473

class AvahiServiceToSyslog(AvahiService):

391

def rename(self):

474

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

392

475

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

393

ret = AvahiService.rename(self)

394

syslogger.setFormatter(logging.Formatter

395

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

396

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

397

.format(self.name)))

476

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

477

syslogger.setFormatter(logging.Formatter(

478

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

479

.format(self.name)))

398

480

return ret

399

481

482

# 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))

497

498

# Unless otherwise indicated, the constants and types below are

499

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

500

501

# 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

511

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()

400

746

401

747

class Client(object):

402

748

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

408

754

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

409

755

to see if the client lives.

410

756

'None' if no process is running.

411

checker_callback_tag: a gobject event source tag, or None

757

checker_callback_tag: a GLib event source tag, or None

412

758

checker_command: string; External command which is run to check

413

759

if client lives. %() expansions are done at

414

760

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

415

761

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

416

checker_initiator_tag: a gobject event source tag, or None

762

checker_initiator_tag: a GLib event source tag, or None

417

763

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

418

764

client_structure: Object describing what attributes a client has

419

765

and is used for storing the client at exit

420

766

current_checker_command: string; current running checker_command

421

disable_initiator_tag: a gobject event source tag, or None

767

disable_initiator_tag: a GLib event source tag, or None

422

768

enabled: bool()

423

769

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

424

770

uniquely identify the client

429

775

last_checker_status: integer between 0 and 255 reflecting exit

430

776

status of last checker. -1 reflects crashed

431

777

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

432

780

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

433

781

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

434

782

D-Bus identifiers

447

795

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

448

796

"last_approval_request", "last_checked_ok",

449

797

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

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

}

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

}

460

809

461

810

@staticmethod

462

811

def config_parser(config):

478

827

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

479

828

"enabled")

480

829

830

# Uppercase and remove spaces from fingerprint for later

831

# comparison purposes with return value from the

832

# fingerprint() function

481

833

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

482

834

.replace(" ", ""))

483

835

if "secret" in section:

484

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

836

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

837

.encode("utf-8"),

838

"base64")

485

839

elif "secfile" in section:

486

840

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

487

841

(section["secfile"])),

525

879

self.expires = None

526

880

527

881

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

531

882

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

532

883

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

533

884

datetime.datetime.utcnow())

540

891

self.current_checker_command = None

541

892

self.approved = None

542

893

self.approvals_pending = 0

543

self.changedstate = (multiprocessing_manager

544

.Condition(multiprocessing_manager

545

.Lock()))

546

self.client_structure = [attr for attr in

547

self.__dict__.iterkeys()

894

self.changedstate = multiprocessing_manager.Condition(

895

multiprocessing_manager.Lock())

896

self.client_structure = [attr

897

for attr in self.__dict__.keys()

548

898

if not attr.startswith("_")]

549

899

self.client_structure.append("client_structure")

550

900

551

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

552

lambda obj:

553

isinstance(obj,

554

property)):

901

for name, t in inspect.getmembers(

902

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

555

903

if not name.startswith("_"):

556

904

self.client_structure.append(name)

557

905

578

926

if not quiet:

579

927

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

580

928

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

581

gobject.source_remove(self.disable_initiator_tag)

929

GLib.source_remove(self.disable_initiator_tag)

582

930

self.disable_initiator_tag = None

583

931

self.expires = None

584

932

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

585

gobject.source_remove(self.checker_initiator_tag)

933

GLib.source_remove(self.checker_initiator_tag)

586

934

self.checker_initiator_tag = None

587

935

self.stop_checker()

588

936

self.enabled = False

589

937

if not quiet:

590

938

self.send_changedstate()

591

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

939

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

592

940

return False

593

941

594

942

def __del__(self):

598

946

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

599

947

# and every interval from then on.

600

948

if self.checker_initiator_tag is not None:

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))

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)

606

953

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

607

954

if self.disable_initiator_tag is not None:

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))

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)

613

958

# Also start a new checker *right now*.

614

959

self.start_checker()

615

960

616

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

961

def checker_callback(self, source, condition, connection,

962

command):

617

963

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

618

964

self.checker_callback_tag = None

619

965

self.checker = None

620

if os.WIFEXITED(condition):

621

self.last_checker_status = os.WEXITSTATUS(condition)

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

622

973

if self.last_checker_status == 0:

623

974

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

624

975

vars(self))

625

976

self.checked_ok()

626

977

else:

627

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

628

vars(self))

978

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

629

979

else:

630

980

self.last_checker_status = -1

981

self.last_checker_signal = -returncode

631

982

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

632

983

vars(self))

984

return False

633

985

634

986

def checked_ok(self):

635

987

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

636

988

self.last_checked_ok = datetime.datetime.utcnow()

637

989

self.last_checker_status = 0

990

self.last_checker_signal = None

638

991

self.bump_timeout()

639

992

640

993

def bump_timeout(self, timeout=None):

642

995

if timeout is None:

643

996

timeout = self.timeout

644

997

if self.disable_initiator_tag is not None:

645

gobject.source_remove(self.disable_initiator_tag)

998

GLib.source_remove(self.disable_initiator_tag)

646

999

self.disable_initiator_tag = None

647

1000

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

648

self.disable_initiator_tag = (gobject.timeout_add

649

(int(timeout.total_seconds()

650

* 1000), self.disable))

1001

self.disable_initiator_tag = GLib.timeout_add(

1002

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

651

1003

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

652

1004

653

1005

def need_approval(self):

667

1019

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

668

1020

# should be.

669

1021

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)

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

684

1026

# Start a new checker if needed

685

1027

if self.checker is None:

686

1028

# Escape attributes for the shell

687

escaped_attrs = { attr:

688

re.escape(unicode(getattr(self,

689

attr)))

690

for attr in self.runtime_expansions }

1029

escaped_attrs = {

1030

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

1031

for attr in self.runtime_expansions }

691

1032

try:

692

1033

command = self.checker_command % escaped_attrs

693

1034

except TypeError as error:

694

1035

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

695

self.checker_command, exc_info=error)

696

return True # Try again later

1036

self.checker_command,

1037

exc_info=error)

1038

return True # Try again later

697

1039

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",

719

exc_info=error)

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

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

740

1066

return True

741

1067

742

1068

def stop_checker(self):

743

1069

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

744

1070

if self.checker_callback_tag:

745

gobject.source_remove(self.checker_callback_tag)

1071

GLib.source_remove(self.checker_callback_tag)

746

1072

self.checker_callback_tag = None

747

1073

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

748

1074

return

749

1075

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

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

1076

self.checker.terminate()

758

1077

self.checker = None

759

1078

760

1079

761

def dbus_service_property(dbus_interface, signature="v",

762

access="readwrite", byte_arrays=False):

1080

def dbus_service_property(dbus_interface,

1081

signature="v",

1082

access="readwrite",

1083

byte_arrays=False):

763

1084

"""Decorators for marking methods of a DBusObjectWithProperties to

764

1085

become properties on the D-Bus.

765

1086

775

1096

if byte_arrays and signature != "ay":

776

1097

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

777

1098

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

1099

778

1100

def decorator(func):

779

1101

func._dbus_is_property = True

780

1102

func._dbus_interface = dbus_interface

785

1107

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

786

1108

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

787

1109

return func

1110

788

1111

return decorator

789

1112

790

1113

799

1122

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

800

1123

"false"}

801

1124

"""

1125

802

1126

def decorator(func):

803

1127

func._dbus_is_interface = True

804

1128

func._dbus_interface = dbus_interface

805

1129

func._dbus_name = dbus_interface

806

1130

return func

1131

807

1132

return decorator

808

1133

809

1134

811

1136

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

812

1137

Usage:

813

1138

1139

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

1140

"org.freedesktop.DBus.Property."

1141

"EmitsChangedSignal": "false"})

814

1142

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

815

1143

access="r")

816

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

817

"org.freedesktop.DBus.Property."

818

"EmitsChangedSignal": "false"})

819

1144

def Property_dbus_property(self):

820

1145

return dbus.Boolean(False)

1146

1147

See also the DBusObjectWithAnnotations class.

821

1148

"""

1149

822

1150

def decorator(func):

823

1151

func._dbus_annotations = annotations

824

1152

return func

1153

825

1154

return decorator

826

1155

827

1156

830

1159

"""

831

1160

pass

832

1161

1162

833

1163

class DBusPropertyAccessException(DBusPropertyException):

834

1164

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

835

1165

"""

842

1172

pass

843

1173

844

1174

845

class DBusObjectWithProperties(dbus.service.Object):

846

"""A D-Bus object with properties.

1175

class DBusObjectWithAnnotations(dbus.service.Object):

1176

"""A D-Bus object with annotations.

847

1177

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.

1178

Classes inheriting from this can use the dbus_annotations

1179

decorator to add annotations to methods or signals.

851

1180

"""

852

1181

853

1182

@staticmethod

863

1192

def _get_all_dbus_things(self, thing):

864

1193

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

865

1194

"""

866

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

867

name),

1195

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

868

1196

athing.__get__(self))

869

1197

for cls in self.__class__.__mro__

870

1198

for name, athing in

871

inspect.getmembers(cls,

872

self._is_dbus_thing(thing)))

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

"""

873

1271

874

1272

def _get_dbus_property(self, interface_name, property_name):

875

1273

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

876

1274

property with the specified name and interface.

877

1275

"""

878

for cls in self.__class__.__mro__:

879

for name, value in (inspect.getmembers

880

(cls,

881

self._is_dbus_thing("property"))):

1276

for cls in self.__class__.__mro__:

1277

for name, value in inspect.getmembers(

1278

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

882

1279

if (value._dbus_name == property_name

883

1280

and value._dbus_interface == interface_name):

884

1281

return value.__get__(self)

885

1282

886

1283

# No such property

887

raise DBusPropertyNotFound(self.dbus_object_path + ":"

888

+ interface_name + "."

889

+ property_name)

890

891

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

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",

892

1298

out_signature="v")

893

1299

def Get(self, interface_name, property_name):

894

1300

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

919

1325

for byte in value))

920

1326

prop(value)

921

1327

922

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

1328

@dbus.service.method(dbus.PROPERTIES_IFACE,

1329

in_signature="s",

923

1330

out_signature="a{sv}")

924

1331

def GetAll(self, interface_name):

925

1332

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

940

1347

if not hasattr(value, "variant_level"):

941

1348

properties[name] = value

942

1349

continue

943

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

944

value.variant_level+1)

1350

properties[name] = type(value)(

1351

value, variant_level = value.variant_level + 1)

945

1352

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

946

1353

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

947

1362

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

948

1363

out_signature="s",

949

1364

path_keyword='object_path',

953

1368

954

1369

Inserts property tags and interface annotation tags.

955

1370

"""

956

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

957

connection)

1371

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1372

object_path,

1373

connection)

958

1374

try:

959

1375

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

1376

960

1377

def make_tag(document, name, prop):

961

1378

e = document.createElement("property")

962

1379

e.setAttribute("name", name)

963

1380

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

964

1381

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

965

1382

return e

1383

966

1384

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

967

1385

# Add property tags

968

1386

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

971

1389

if prop._dbus_interface

972

1390

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

973

1391

if_tag.appendChild(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)

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)

1005

1408

# Add the names to the return values for the

1006

1409

# "org.freedesktop.DBus.Properties" methods

1007

1410

if (if_tag.getAttribute("name")

1025

1428

exc_info=error)

1026

1429

return xmlstring

1027

1430

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

1028

1499

1029

1500

def datetime_to_dbus(dt, variant_level=0):

1030

1501

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

1031

1502

if dt is None:

1032

1503

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

1033

return dbus.String(dt.isoformat(),

1034

variant_level=variant_level)

1504

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

1035

1505

1036

1506

1037

1507

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1057

1527

(from DBusObjectWithProperties) and interfaces (from the

1058

1528

dbus_interface_annotations decorator).

1059

1529

"""

1530

1060

1531

def wrapper(cls):

1061

1532

for orig_interface_name, alt_interface_name in (

1062

alt_interface_names.items()):

1533

alt_interface_names.items()):

1063

1534

attr = {}

1064

1535

interface_names = set()

1065

1536

# Go though all attributes of the class

1067

1538

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

1068

1539

# with the wrong interface name

1069

1540

if (not hasattr(attribute, "_dbus_interface")

1070

or not attribute._dbus_interface

1071

.startswith(orig_interface_name)):

1541

or not attribute._dbus_interface.startswith(

1542

orig_interface_name)):

1072

1543

continue

1073

1544

# Create an alternate D-Bus interface name based on

1074

1545

# the current name

1075

alt_interface = (attribute._dbus_interface

1076

.replace(orig_interface_name,

1077

alt_interface_name))

1546

alt_interface = attribute._dbus_interface.replace(

1547

orig_interface_name, alt_interface_name)

1078

1548

interface_names.add(alt_interface)

1079

1549

# Is this a D-Bus signal?

1080

1550

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

1081

1551

# Extract the original non-method undecorated

1082

1552

# function by black magic

1083

nonmethod_func = (dict(

1553

if sys.version_info.major == 2:

1554

nonmethod_func = (dict(

1084

1555

zip(attribute.func_code.co_freevars,

1085

attribute.__closure__))["func"]

1086

.cell_contents)

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)

1087

1563

# Create a new, but exactly alike, function

1088

1564

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

1089

1565

# with the alternate D-Bus interface name

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)))

1566

new_function = copy_function(nonmethod_func)

1567

new_function = (dbus.service.signal(

1568

alt_interface,

1569

attribute._dbus_signature)(new_function))

1099

1570

# Copy annotations, if any

1100

1571

try:

1101

new_function._dbus_annotations = (

1102

dict(attribute._dbus_annotations))

1572

new_function._dbus_annotations = dict(

1573

attribute._dbus_annotations)

1103

1574

except AttributeError:

1104

1575

pass

1105

1576

# Define a creator of a function to call both the

1110

1581

"""This function is a scope container to pass

1111

1582

func1 and func2 to the "call_both" function

1112

1583

outside of its arguments"""

1584

1585

@functools.wraps(func2)

1113

1586

def call_both(*args, **kwargs):

1114

1587

"""This function will emit two D-Bus

1115

1588

signals by calling func1 and func2"""

1116

1589

func1(*args, **kwargs)

1117

1590

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

1118

1596

return call_both

1119

1597

# Create the "call_both" function and add it to

1120

1598

# the class

1125

1603

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

1126

1604

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

1127

1605

# to the class.

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)))

1606

attr[attrname] = (

1607

dbus.service.method(

1608

alt_interface,

1609

attribute._dbus_in_signature,

1610

attribute._dbus_out_signature)

1611

(copy_function(attribute)))

1138

1612

# Copy annotations, if any

1139

1613

try:

1140

attr[attrname]._dbus_annotations = (

1141

dict(attribute._dbus_annotations))

1614

attr[attrname]._dbus_annotations = dict(

1615

attribute._dbus_annotations)

1142

1616

except AttributeError:

1143

1617

pass

1144

1618

# Is this a D-Bus property?

1147

1621

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

1148

1622

# property with the alternate D-Bus interface

1149

1623

# name. Add it to the class.

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)))

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)))

1163

1630

# Copy annotations, if any

1164

1631

try:

1165

attr[attrname]._dbus_annotations = (

1166

dict(attribute._dbus_annotations))

1632

attr[attrname]._dbus_annotations = dict(

1633

attribute._dbus_annotations)

1167

1634

except AttributeError:

1168

1635

pass

1169

1636

# Is this a D-Bus interface?

1172

1639

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

1173

1640

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

1174

1641

# to the class.

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)))

1642

attr[attrname] = (

1643

dbus_interface_annotations(alt_interface)

1644

(copy_function(attribute)))

1183

1645

if deprecate:

1184

1646

# Deprecate all alternate interfaces

1185

1647

iname="_AlternateDBusNames_interface_annotation{}"

1186

1648

for interface_name in interface_names:

1649

1187

1650

@dbus_interface_annotations(interface_name)

1188

1651

def func(self):

1189

1652

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

1190

"true" }

1653

"true" }

1191

1654

# Find an unused name

1192

1655

for aname in (iname.format(i)

1193

1656

for i in itertools.count()):

1197

1660

if interface_names:

1198

1661

# Replace the class with a new subclass of it with

1199

1662

# methods, signals, etc. as created above.

1200

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

1201

(cls,), attr)

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)

1202

1669

return cls

1670

1203

1671

return wrapper

1204

1672

1205

1673

1206

1674

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

1207

"se.bsnet.fukt.Mandos"})

1675

"se.bsnet.fukt.Mandos"})

1208

1676

class ClientDBus(Client, DBusObjectWithProperties):

1209

1677

"""A Client class using D-Bus

1210

1678

1214

1682

"""

1215

1683

1216

1684

runtime_expansions = (Client.runtime_expansions

1217

+ ("dbus_object_path",))

1685

+ ("dbus_object_path", ))

1686

1687

_interface = "se.recompile.Mandos.Client"

1218

1688

1219

1689

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

1220

1690

1223

1693

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

1224

1694

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

1225

1695

# the D-Bus

1226

client_object_name = unicode(self.name).translate(

1696

client_object_name = str(self.name).translate(

1227

1697

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

1228

1698

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

1229

self.dbus_object_path = (dbus.ObjectPath

1230

("/clients/" + client_object_name))

1699

self.dbus_object_path = dbus.ObjectPath(

1700

"/clients/" + client_object_name)

1231

1701

DBusObjectWithProperties.__init__(self, self.bus,

1232

1702

self.dbus_object_path)

1233

1703

1234

def notifychangeproperty(transform_func,

1235

dbus_name, type_func=lambda x: x,

1236

variant_level=1):

1704

def notifychangeproperty(transform_func, dbus_name,

1705

type_func=lambda x: x,

1706

variant_level=1,

1707

invalidate_only=False,

1708

_interface=_interface):

1237

1709

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

1238

1710

its changes to DBus.

1239

1711

1245

1717

variant_level: D-Bus variant level. Default: 1

1246

1718

"""

1247

1719

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

1720

1248

1721

def setter(self, value):

1249

1722

if hasattr(self, "dbus_object_path"):

1250

1723

if (not hasattr(self, attrname) or

1251

1724

type_func(getattr(self, attrname, None))

1252

1725

!= type_func(value)):

1253

dbus_value = transform_func(type_func(value),

1254

variant_level

1255

=variant_level)

1256

self.PropertyChanged(dbus.String(dbus_name),

1257

dbus_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())

1258

1741

setattr(self, attrname, value)

1259

1742

1260

1743

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

1266

1749

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

1267

1750

last_enabled = notifychangeproperty(datetime_to_dbus,

1268

1751

"LastEnabled")

1269

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

1270

type_func = lambda checker:

1271

checker is not None)

1752

checker = notifychangeproperty(

1753

dbus.Boolean, "CheckerRunning",

1754

type_func = lambda checker: checker is not None)

1272

1755

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1273

1756

"LastCheckedOK")

1274

1757

last_checker_status = notifychangeproperty(dbus.Int16,

1277

1760

datetime_to_dbus, "LastApprovalRequest")

1278

1761

approved_by_default = notifychangeproperty(dbus.Boolean,

1279

1762

"ApprovedByDefault")

1280

approval_delay = notifychangeproperty(dbus.UInt64,

1281

"ApprovalDelay",

1282

type_func =

1283

lambda td: td.total_seconds()

1284

* 1000)

1763

approval_delay = notifychangeproperty(

1764

dbus.UInt64, "ApprovalDelay",

1765

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

1285

1766

approval_duration = notifychangeproperty(

1286

1767

dbus.UInt64, "ApprovalDuration",

1287

1768

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

1288

1769

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

1289

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

1290

type_func = lambda td:

1291

td.total_seconds() * 1000)

1770

timeout = notifychangeproperty(

1771

dbus.UInt64, "Timeout",

1772

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

1292

1773

extended_timeout = notifychangeproperty(

1293

1774

dbus.UInt64, "ExtendedTimeout",

1294

1775

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)

1776

interval = notifychangeproperty(

1777

dbus.UInt64, "Interval",

1778

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

1300

1779

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

1780

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

1781

invalidate_only=True)

1301

1782

1302

1783

del notifychangeproperty

1303

1784

1310

1791

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

1311

1792

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

1312

1793

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)

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:

1319

1801

# Emit D-Bus signal

1320

1802

self.CheckerCompleted(dbus.Int16(exitstatus),

1321

dbus.Int64(condition),

1803

# This is specific to GNU libC

1804

dbus.Int64(exitstatus << 8),

1322

1805

dbus.String(command))

1323

1806

else:

1324

1807

# Emit D-Bus signal

1325

1808

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

1326

dbus.Int64(condition),

1809

dbus.Int64(

1810

# This is specific to GNU libC

1811

(exitstatus << 8)

1812

| self.last_checker_signal),

1327

1813

dbus.String(command))

1328

1329

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

1330

*args, **kwargs)

1814

return ret

1331

1815

1332

1816

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

1333

1817

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

1345

1829

1346

1830

def approve(self, value=True):

1347

1831

self.approved = value

1348

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

1349

* 1000), self._reset_approved)

1832

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

1833

* 1000), self._reset_approved)

1350

1834

self.send_changedstate()

1351

1835

1352

1836

## D-Bus methods, signals & properties

1353

_interface = "se.recompile.Mandos.Client"

1354

1837

1355

1838

## Interfaces

1356

1839

1357

@dbus_interface_annotations(_interface)

1358

def _foo(self):

1359

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

1360

"false"}

1361

1362

1840

## Signals

1363

1841

1364

1842

# CheckerCompleted - signal

1374

1852

pass

1375

1853

1376

1854

# PropertyChanged - signal

1855

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

1377

1856

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

1378

1857

def PropertyChanged(self, property, value):

1379

1858

"D-Bus signal"

1413

1892

self.checked_ok()

1414

1893

1415

1894

# Enable - method

1895

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

1416

1896

@dbus.service.method(_interface)

1417

1897

def Enable(self):

1418

1898

"D-Bus method"

1419

1899

self.enable()

1420

1900

1421

1901

# StartChecker - method

1902

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

1422

1903

@dbus.service.method(_interface)

1423

1904

def StartChecker(self):

1424

1905

"D-Bus method"

1425

1906

self.start_checker()

1426

1907

1427

1908

# Disable - method

1909

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

1428

1910

@dbus.service.method(_interface)

1429

1911

def Disable(self):

1430

1912

"D-Bus method"

1431

1913

self.disable()

1432

1914

1433

1915

# StopChecker - method

1916

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

1434

1917

@dbus.service.method(_interface)

1435

1918

def StopChecker(self):

1436

1919

self.stop_checker()

1443

1926

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

1444

1927

1445

1928

# ApprovedByDefault - property

1446

@dbus_service_property(_interface, signature="b",

1929

@dbus_service_property(_interface,

1930

signature="b",

1447

1931

access="readwrite")

1448

1932

def ApprovedByDefault_dbus_property(self, value=None):

1449

1933

if value is None: # get

1451

1935

self.approved_by_default = bool(value)

1452

1936

1453

1937

# ApprovalDelay - property

1454

@dbus_service_property(_interface, signature="t",

1938

@dbus_service_property(_interface,

1939

signature="t",

1455

1940

access="readwrite")

1456

1941

def ApprovalDelay_dbus_property(self, value=None):

1457

1942

if value is None: # get

1460

1945

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

1461

1946

1462

1947

# ApprovalDuration - property

1463

@dbus_service_property(_interface, signature="t",

1948

@dbus_service_property(_interface,

1949

signature="t",

1464

1950

access="readwrite")

1465

1951

def ApprovalDuration_dbus_property(self, value=None):

1466

1952

if value is None: # get

1469

1955

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

1470

1956

1471

1957

# Name - property

1958

@dbus_annotations(

1959

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

1472

1960

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

1473

1961

def Name_dbus_property(self):

1474

1962

return dbus.String(self.name)

1475

1963

1476

1964

# Fingerprint - property

1965

@dbus_annotations(

1966

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

1477

1967

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

1478

1968

def Fingerprint_dbus_property(self):

1479

1969

return dbus.String(self.fingerprint)

1480

1970

1481

1971

# Host - property

1482

@dbus_service_property(_interface, signature="s",

1972

@dbus_service_property(_interface,

1973

signature="s",

1483

1974

access="readwrite")

1484

1975

def Host_dbus_property(self, value=None):

1485

1976

if value is None: # get

1486

1977

return dbus.String(self.host)

1487

self.host = unicode(value)

1978

self.host = str(value)

1488

1979

1489

1980

# Created - property

1981

@dbus_annotations(

1982

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

1490

1983

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

1491

1984

def Created_dbus_property(self):

1492

1985

return datetime_to_dbus(self.created)

1497

1990

return datetime_to_dbus(self.last_enabled)

1498

1991

1499

1992

# Enabled - property

1500

@dbus_service_property(_interface, signature="b",

1993

@dbus_service_property(_interface,

1994

signature="b",

1501

1995

access="readwrite")

1502

1996

def Enabled_dbus_property(self, value=None):

1503

1997

if value is None: # get

1508

2002

self.disable()

1509

2003

1510

2004

# LastCheckedOK - property

1511

@dbus_service_property(_interface, signature="s",

2005

@dbus_service_property(_interface,

2006

signature="s",

1512

2007

access="readwrite")

1513

2008

def LastCheckedOK_dbus_property(self, value=None):

1514

2009

if value is not None:

1517

2012

return datetime_to_dbus(self.last_checked_ok)

1518

2013

1519

2014

# LastCheckerStatus - property

1520

@dbus_service_property(_interface, signature="n",

1521

access="read")

2015

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

1522

2016

def LastCheckerStatus_dbus_property(self):

1523

2017

return dbus.Int16(self.last_checker_status)

1524

2018

1533

2027

return datetime_to_dbus(self.last_approval_request)

1534

2028

1535

2029

# Timeout - property

1536

@dbus_service_property(_interface, signature="t",

2030

@dbus_service_property(_interface,

2031

signature="t",

1537

2032

access="readwrite")

1538

2033

def Timeout_dbus_property(self, value=None):

1539

2034

if value is None: # get

1551

2046

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

1552

2047

is None):

1553

2048

return

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))

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)

1559

2053

1560

2054

# ExtendedTimeout - property

1561

@dbus_service_property(_interface, signature="t",

2055

@dbus_service_property(_interface,

2056

signature="t",

1562

2057

access="readwrite")

1563

2058

def ExtendedTimeout_dbus_property(self, value=None):

1564

2059

if value is None: # get

1567

2062

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

1568

2063

1569

2064

# Interval - property

1570

@dbus_service_property(_interface, signature="t",

2065

@dbus_service_property(_interface,

2066

signature="t",

1571

2067

access="readwrite")

1572

2068

def Interval_dbus_property(self, value=None):

1573

2069

if value is None: # get

1577

2073

return

1578

2074

if self.enabled:

1579

2075

# Reschedule checker run

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

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

1584

2080

1585

2081

# Checker - property

1586

@dbus_service_property(_interface, signature="s",

2082

@dbus_service_property(_interface,

2083

signature="s",

1587

2084

access="readwrite")

1588

2085

def Checker_dbus_property(self, value=None):

1589

2086

if value is None: # get

1590

2087

return dbus.String(self.checker_command)

1591

self.checker_command = unicode(value)

2088

self.checker_command = str(value)

1592

2089

1593

2090

# CheckerRunning - property

1594

@dbus_service_property(_interface, signature="b",

2091

@dbus_service_property(_interface,

2092

signature="b",

1595

2093

access="readwrite")

1596

2094

def CheckerRunning_dbus_property(self, value=None):

1597

2095

if value is None: # get

1602

2100

self.stop_checker()

1603

2101

1604

2102

# ObjectPath - property

2103

@dbus_annotations(

2104

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

2105

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

1605

2106

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

1606

2107

def ObjectPath_dbus_property(self):

1607

2108

return self.dbus_object_path # is already a dbus.ObjectPath

1608

2109

1609

2110

# Secret = property

1610

@dbus_service_property(_interface, signature="ay",

1611

access="write", byte_arrays=True)

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)

1612

2118

def Secret_dbus_property(self, value):

1613

2119

self.secret = bytes(value)

1614

2120

1620

2126

self._pipe = child_pipe

1621

2127

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

1622

2128

if not self._pipe.recv():

1623

raise KeyError()

2129

raise KeyError(fpr)

1624

2130

1625

2131

def __getattribute__(self, name):

1626

2132

if name == '_pipe':

1630

2136

if data[0] == 'data':

1631

2137

return data[1]

1632

2138

if data[0] == 'function':

2139

1633

2140

def func(*args, **kwargs):

1634

2141

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

1635

2142

return self._pipe.recv()[1]

2143

1636

2144

return func

1637

2145

1638

2146

def __setattr__(self, name, value):

1650

2158

def handle(self):

1651

2159

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

1652

2160

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

1653

unicode(self.client_address))

2161

str(self.client_address))

1654

2162

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

1655

2163

self.server.child_pipe.fileno())

1656

2164

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.

2165

session = gnutls.ClientSession(self.request)

1666

2166

1667

2167

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

1668

2168

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

1672

2172

priority = self.server.gnutls_priority

1673

2173

if priority is None:

1674

2174

priority = "NORMAL"

1675

(gnutls.library.functions

1676

.gnutls_priority_set_direct(session._c_object,

1677

priority, None))

2175

gnutls.priority_set_direct(session._c_object, priority,

2176

None)

1678

2177

1679

2178

# Start communication using the Mandos protocol

1680

2179

# Get protocol number

1690

2189

# Start GnuTLS connection

1691

2190

try:

1692

2191

session.handshake()

1693

except gnutls.errors.GNUTLSError as error:

2192

except gnutls.Error as error:

1694

2193

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

1695

2194

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

1696

2195

# established. Just abandon the request.

1700

2199

approval_required = False

1701

2200

try:

1702

2201

try:

1703

fpr = self.fingerprint(self.peer_certificate

1704

(session))

1705

except (TypeError,

1706

gnutls.errors.GNUTLSError) as error:

2202

fpr = self.fingerprint(

2203

self.peer_certificate(session))

2204

except (TypeError, gnutls.Error) as error:

1707

2205

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

1708

2206

return

1709

2207

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

1722

2220

while True:

1723

2221

if not client.enabled:

1724

2222

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

1725

client.name)

2223

client.name)

1726

2224

if self.server.use_dbus:

1727

2225

# Emit D-Bus signal

1728

2226

client.Rejected("Disabled")

1767

2265

else:

1768

2266

delay -= time2 - time

1769

2267

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

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

1782

2274

1783

2275

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

1784

2276

# bump the timeout using extended_timeout

1792

2284

client.approvals_pending -= 1

1793

2285

try:

1794

2286

session.bye()

1795

except gnutls.errors.GNUTLSError as error:

2287

except gnutls.Error as error:

1796

2288

logger.warning("GnuTLS bye failed",

1797

2289

exc_info=error)

1798

2290

1800

2292

def peer_certificate(session):

1801

2293

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

1802

2294

# If not an OpenPGP certificate...

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

2295

if (gnutls.certificate_type_get(session._c_object)

2296

!= gnutls.CRT_OPENPGP):

2297

# ...return invalid data

2298

return b""

1808

2299

list_size = ctypes.c_uint(1)

1809

cert_list = (gnutls.library.functions

1810

.gnutls_certificate_get_peers

2300

cert_list = (gnutls.certificate_get_peers

1811

2301

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

1812

2302

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

1813

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

1814

" certificate")

2303

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

1815

2304

if list_size.value == 0:

1816

2305

return None

1817

2306

cert = cert_list[0]

1821

2310

def fingerprint(openpgp):

1822

2311

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1823

2312

# New GnuTLS "datum" with the OpenPGP public key

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))))

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)))

1829

2317

# New empty GnuTLS certificate

1830

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1831

(gnutls.library.functions

1832

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2318

crt = gnutls.openpgp_crt_t()

2319

gnutls.openpgp_crt_init(ctypes.byref(crt))

1833

2320

# Import the OpenPGP public key into the certificate

1834

(gnutls.library.functions

1835

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

1836

gnutls.library.constants

1837

.GNUTLS_OPENPGP_FMT_RAW))

2321

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

2322

gnutls.OPENPGP_FMT_RAW)

1838

2323

# Verify the self signature in the key

1839

2324

crtverify = ctypes.c_uint()

1840

(gnutls.library.functions

1841

.gnutls_openpgp_crt_verify_self(crt, 0,

1842

ctypes.byref(crtverify)))

2325

gnutls.openpgp_crt_verify_self(crt, 0,

2326

ctypes.byref(crtverify))

1843

2327

if crtverify.value != 0:

1844

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1845

raise (gnutls.errors.CertificateSecurityError

1846

("Verify failed"))

2328

gnutls.openpgp_crt_deinit(crt)

2329

raise gnutls.CertificateSecurityError("Verify failed")

1847

2330

# New buffer for the fingerprint

1848

2331

buf = ctypes.create_string_buffer(20)

1849

2332

buf_len = ctypes.c_size_t()

1850

2333

# Get the fingerprint from the certificate into the buffer

1851

(gnutls.library.functions

1852

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

1853

ctypes.byref(buf_len)))

2334

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

2335

ctypes.byref(buf_len))

1854

2336

# Deinit the certificate

1855

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2337

gnutls.openpgp_crt_deinit(crt)

1856

2338

# Convert the buffer to a Python bytestring

1857

2339

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

1858

2340

# Convert the bytestring to hexadecimal notation

1862

2344

1863

2345

class MultiprocessingMixIn(object):

1864

2346

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

2347

1865

2348

def sub_process_main(self, request, address):

1866

2349

try:

1867

2350

self.finish_request(request, address)

1879

2362

1880

2363

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1881

2364

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

2365

1882

2366

def process_request(self, request, client_address):

1883

2367

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

1884

2368

1905

2389

interface: None or a network interface name (string)

1906

2390

use_ipv6: Boolean; to use IPv6 or not

1907

2391

"""

2392

1908

2393

def __init__(self, server_address, RequestHandlerClass,

1909

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

2394

interface=None,

2395

use_ipv6=True,

2396

socketfd=None):

1910

2397

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

1911

2398

creating a new one with socket.socket().

1912

2399

"""

1953

2440

self.interface)

1954

2441

else:

1955

2442

try:

1956

self.socket.setsockopt(socket.SOL_SOCKET,

1957

SO_BINDTODEVICE,

1958

(self.interface + "\0")

1959

.encode("utf-8"))

2443

self.socket.setsockopt(

2444

socket.SOL_SOCKET, SO_BINDTODEVICE,

2445

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

1960

2446

except socket.error as error:

1961

2447

if error.errno == errno.EPERM:

1962

2448

logger.error("No permission to bind to"

1980

2466

self.server_address = (any_address,

1981

2467

self.server_address[1])

1982

2468

elif not self.server_address[1]:

1983

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

1984

0)

2469

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

1985

2470

# if self.interface:

1986

2471

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

1987

2472

# 0, # port

1999

2484

gnutls_priority GnuTLS priority string

2000

2485

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

2001

2486

2002

Assumes a gobject.MainLoop event loop.

2487

Assumes a GLib.MainLoop event loop.

2003

2488

"""

2489

2004

2490

def __init__(self, server_address, RequestHandlerClass,

2005

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

2006

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

2491

interface=None,

2492

use_ipv6=True,

2493

clients=None,

2494

gnutls_priority=None,

2495

use_dbus=True,

2496

socketfd=None):

2007

2497

self.enabled = False

2008

2498

self.clients = clients

2009

2499

if self.clients is None:

2015

2505

interface = interface,

2016

2506

use_ipv6 = use_ipv6,

2017

2507

socketfd = socketfd)

2508

2018

2509

def server_activate(self):

2019

2510

if self.enabled:

2020

2511

return socketserver.TCPServer.server_activate(self)

2024

2515

2025

2516

def add_pipe(self, parent_pipe, proc):

2026

2517

# Call "handle_ipc" for both data and EOF events

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))

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))

2033

2524

2034

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

2035

proc = None, client_object=None):

2525

def handle_ipc(self, source, condition,

2526

parent_pipe=None,

2527

proc = None,

2528

client_object=None):

2036

2529

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

2037

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

2530

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

2038

2531

# Wait for other process to exit

2039

2532

proc.join()

2040

2533

return False

2047

2540

fpr = request[1]

2048

2541

address = request[2]

2049

2542

2050

for c in self.clients.itervalues():

2543

for c in self.clients.values():

2051

2544

if c.fingerprint == fpr:

2052

2545

client = c

2053

2546

break

2061

2554

parent_pipe.send(False)

2062

2555

return False

2063

2556

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))

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))

2072

2564

parent_pipe.send(True)

2073

2565

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

2074

2566

# same fileno

2080

2572

2081

2573

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

2082

2574

funcname)(*args,

2083

**kwargs)))

2575

**kwargs)))

2084

2576

2085

2577

if command == 'getattr':

2086

2578

attrname = request[1]

2087

if callable(client_object.__getattribute__(attrname)):

2088

parent_pipe.send(('function',))

2579

if isinstance(client_object.__getattribute__(attrname),

2580

collections.Callable):

2581

parent_pipe.send(('function', ))

2089

2582

else:

2090

parent_pipe.send(('data', client_object

2091

.__getattribute__(attrname)))

2583

parent_pipe.send((

2584

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

2092

2585

2093

2586

if command == 'setattr':

2094

2587

attrname = request[1]

2125

2618

# avoid excessive use of external libraries.

2126

2619

2127

2620

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

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

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

2137

2626

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

2138

2627

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

2139

2628

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

2140

2629

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

2141

2630

datetime.timedelta(seconds=1),

2142

frozenset((token_end,)))

2631

frozenset((token_end, )))

2143

2632

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

2144

2633

datetime.timedelta(minutes=1),

2145

2634

frozenset((token_second, token_end)))

2161

2650

frozenset((token_month, token_end)))

2162

2651

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

2163

2652

datetime.timedelta(weeks=1),

2164

frozenset((token_end,)))

2653

frozenset((token_end, )))

2165

2654

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

2166

2655

frozenset((token_year, token_month,

2167

2656

token_day, token_time,

2169

2658

# Define starting values

2170

2659

value = datetime.timedelta() # Value so far

2171

2660

found_token = None

2172

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

2661

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

2173

2662

s = duration # String left to parse

2174

2663

# Loop until end token is found

2175

2664

while found_token is not token_end:

2192

2681

break

2193

2682

else:

2194

2683

# No currently valid tokens were found

2195

raise ValueError("Invalid RFC 3339 duration")

2684

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

2685

.format(duration))

2196

2686

# End token found

2197

2687

return value

2198

2688

2235

2725

elif suffix == "w":

2236

2726

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

2237

2727

else:

2238

raise ValueError("Unknown suffix {!r}"

2239

.format(suffix))

2728

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

2240

2729

except IndexError as e:

2241

2730

raise ValueError(*(e.args))

2242

2731

timevalue += delta

2258

2747

# Close all standard open file descriptors

2259

2748

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

2260

2749

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

2261

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

2750

raise OSError(errno.ENODEV,

2751

"{} not a character device"

2262

2752

.format(os.devnull))

2263

2753

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

2264

2754

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

2330

2820

"port": "",

2331

2821

"debug": "False",

2332

2822

"priority":

2333

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

2823

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

2824

":+SIGN-DSA-SHA256",

2334

2825

"servicename": "Mandos",

2335

2826

"use_dbus": "True",

2336

2827

"use_ipv6": "True",

2340

2831

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

2341

2832

"foreground": "False",

2342

2833

"zeroconf": "True",

2343

}

2834

}

2344

2835

2345

2836

# Parse config file for server-global settings

2346

2837

server_config = configparser.SafeConfigParser(server_defaults)

2347

2838

del server_defaults

2348

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

2349

"mandos.conf"))

2839

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

2350

2840

# Convert the SafeConfigParser object to a dict

2351

2841

server_settings = server_config.defaults()

2352

2842

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

2370

2860

# Override the settings from the config file with command line

2371

2861

# options, if set.

2372

2862

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

2373

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

2374

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

2375

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

2863

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

2864

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

2865

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

2376

2866

value = getattr(options, option)

2377

2867

if value is not None:

2378

2868

server_settings[option] = value

2393

2883

2394

2884

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

2395

2885

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")

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")

2401

2890

2402

2891

# For convenience

2403

2892

debug = server_settings["debug"]

2419

2908

initlogger(debug, level)

2420

2909

2421

2910

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

2422

syslogger.setFormatter(logging.Formatter

2423

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

2424

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

2425

.format(server_settings

2426

["servicename"])))

2911

syslogger.setFormatter(

2912

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

2913

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

2914

server_settings["servicename"])))

2427

2915

2428

2916

# Parse config file with clients

2429

2917

client_config = configparser.SafeConfigParser(Client

2437

2925

socketfd = None

2438

2926

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

2439

2927

socketfd = server_settings["socket"]

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)

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)

2450

2936

if not foreground:

2451

2937

pidfilename = "/run/mandos.pid"

2452

2938

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

2453

2939

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

2454

2940

pidfile = None

2455

2941

try:

2456

pidfile = open(pidfilename, "w")

2942

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

2457

2943

except IOError as e:

2458

2944

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

2459

2945

exc_info=e)

2460

2946

2461

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

2947

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

2948

("mandos", "mandos"),

2949

("nobody", "nogroup")):

2462

2950

try:

2463

2951

uid = pwd.getpwnam(name).pw_uid

2464

gid = pwd.getpwnam(name).pw_gid

2952

gid = pwd.getpwnam(group).pw_gid

2465

2953

break

2466

2954

except KeyError:

2467

2955

continue

2471

2959

try:

2472

2960

os.setgid(gid)

2473

2961

os.setuid(uid)

2962

if debug:

2963

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

2964

gid))

2474

2965

except OSError as error:

2966

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

2967

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

2475

2968

if error.errno != errno.EPERM:

2476

2969

raise

2477

2970

2480

2973

2481

2974

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

2482

2975

# - GnuTLS manual

2483

gnutls.library.functions.gnutls_global_set_log_level(11)

2976

gnutls.global_set_log_level(11)

2484

2977

2485

@gnutls.library.types.gnutls_log_func

2978

@gnutls.log_func

2486

2979

def debug_gnutls(level, string):

2487

2980

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

2488

2981

2489

(gnutls.library.functions

2490

.gnutls_global_set_log_function(debug_gnutls))

2982

gnutls.global_set_log_function(debug_gnutls)

2491

2983

2492

2984

# Redirect stdin so all checkers get /dev/null

2493

2985

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

2500

2992

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

2501

2993

daemon()

2502

2994

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()

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()

2506

2998

2507

2999

global main_loop

2508

3000

# From the Avahi example code

2509

3001

DBusGMainLoop(set_as_default=True)

2510

main_loop = gobject.MainLoop()

3002

main_loop = GLib.MainLoop()

2511

3003

bus = dbus.SystemBus()

2512

3004

# End of Avahi example code

2513

3005

if use_dbus:

2514

3006

try:

2515

3007

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

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:

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:

2521

3014

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

2522

3015

use_dbus = False

2523

3016

server_settings["use_dbus"] = False

2524

3017

tcp_server.use_dbus = False

2525

3018

if zeroconf:

2526

3019

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2527

service = AvahiServiceToSyslog(name =

2528

server_settings["servicename"],

2529

servicetype = "_mandos._tcp",

2530

protocol = protocol, bus = bus)

3020

service = AvahiServiceToSyslog(

3021

name = server_settings["servicename"],

3022

servicetype = "_mandos._tcp",

3023

protocol = protocol,

3024

bus = bus)

2531

3025

if server_settings["interface"]:

2532

service.interface = (if_nametoindex

2533

(server_settings["interface"]

2534

.encode("utf-8")))

3026

service.interface = if_nametoindex(

3027

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

2535

3028

2536

3029

global multiprocessing_manager

2537

3030

multiprocessing_manager = multiprocessing.Manager()

2556

3049

if server_settings["restore"]:

2557

3050

try:

2558

3051

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

2559

clients_data, old_client_settings = (pickle.load

2560

(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"))

2561

3097

os.remove(stored_state_path)

2562

3098

except IOError as e:

2563

3099

if e.errno == errno.ENOENT:

2564

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

2565

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

3100

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

3101

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

2566

3102

else:

2567

3103

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

2568

3104

exc_info=e)

2569

3105

raise

2570

3106

except EOFError as e:

2571

3107

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

2572

"EOFError:", exc_info=e)

3108

"EOFError:",

3109

exc_info=e)

2573

3110

2574

3111

with PGPEngine() as pgp:

2575

3112

for client_name, client in clients_data.items():

2587

3124

# For each value in new config, check if it

2588

3125

# differs from the old config value (Except for

2589

3126

# the "secret" attribute)

2590

if (name != "secret" and

2591

value != old_client_settings[client_name]

2592

[name]):

3127

if (name != "secret"

3128

and (value !=

3129

old_client_settings[client_name][name])):

2593

3130

client[name] = value

2594

3131

except KeyError:

2595

3132

pass

2596

3133

2597

3134

# Clients who has passed its expire date can still be

2598

# enabled if its last checker was successful. Clients

3135

# enabled if its last checker was successful. A Client

2599

3136

# whose checker succeeded before we stored its state is

2600

3137

# assumed to have successfully run all checkers during

2601

3138

# downtime.

2604

3141

if not client["last_checked_ok"]:

2605

3142

logger.warning(

2606

3143

"disabling client {} - Client never "

2607

"performed a successful checker"

2608

.format(client_name))

3144

"performed a successful checker".format(

3145

client_name))

2609

3146

client["enabled"] = False

2610

3147

elif client["last_checker_status"] != 0:

2611

3148

logger.warning(

2612

3149

"disabling client {} - Client last"

2613

" checker failed with error code {}"

2614

.format(client_name,

2615

client["last_checker_status"]))

3150

" checker failed with error code"

3151

" {}".format(

3152

client_name,

3153

client["last_checker_status"]))

2616

3154

client["enabled"] = False

2617

3155

else:

2618

client["expires"] = (datetime.datetime

2619

.utcnow()

2620

+ client["timeout"])

3156

client["expires"] = (

3157

datetime.datetime.utcnow()

3158

+ client["timeout"])

2621

3159

logger.debug("Last checker succeeded,"

2622

" keeping {} enabled"

2623

.format(client_name))

3160

" keeping {} enabled".format(

3161

client_name))

2624

3162

try:

2625

client["secret"] = (

2626

pgp.decrypt(client["encrypted_secret"],

2627

client_settings[client_name]

2628

["secret"]))

3163

client["secret"] = pgp.decrypt(

3164

client["encrypted_secret"],

3165

client_settings[client_name]["secret"])

2629

3166

except PGPError:

2630

3167

# If decryption fails, we use secret from new settings

2631

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

2632

.format(client_name))

2633

client["secret"] = (

2634

client_settings[client_name]["secret"])

3168

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

3169

client_name))

3170

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

3171

["secret"])

2635

3172

2636

3173

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

2637

3174

for client_name in (set(old_client_settings)

2644

3181

# Create all client objects

2645

3182

for client_name, client in clients_data.items():

2646

3183

tcp_server.clients[client_name] = client_class(

2647

name = client_name, settings = client,

3184

name = client_name,

3185

settings = client,

2648

3186

server_settings = server_settings)

2649

3187

2650

3188

if not tcp_server.clients:

2652

3190

2653

3191

if not foreground:

2654

3192

if pidfile is not None:

3193

pid = os.getpid()

2655

3194

try:

2656

3195

with pidfile:

2657

pid = os.getpid()

2658

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

3196

print(pid, file=pidfile)

2659

3197

except IOError:

2660

3198

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

2661

3199

pidfilename, pid)

2662

3200

del pidfile

2663

3201

del pidfilename

2664

3202

2665

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

2666

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

3203

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

3204

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3205

lambda: main_loop.quit() and False)

2667

3206

2668

3207

if use_dbus:

2669

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

2670

"se.bsnet.fukt.Mandos"})

2671

class MandosDBusService(DBusObjectWithProperties):

3208

3209

@alternate_dbus_interfaces(

3210

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

3211

class MandosDBusService(DBusObjectWithObjectManager):

2672

3212

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

3213

2673

3214

def __init__(self):

2674

3215

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

3216

2675

3217

_interface = "se.recompile.Mandos"

2676

3218

2677

@dbus_interface_annotations(_interface)

2678

def _foo(self):

2679

return { "org.freedesktop.DBus.Property"

2680

".EmitsChangedSignal":

2681

"false"}

2682

2683

3219

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

2684

3220

def ClientAdded(self, objpath):

2685

3221

"D-Bus signal"

2690

3226

"D-Bus signal"

2691

3227

pass

2692

3228

3229

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

3230

"true"})

2693

3231

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

2694

3232

def ClientRemoved(self, objpath, name):

2695

3233

"D-Bus signal"

2696

3234

pass

2697

3235

3236

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

3237

"true"})

2698

3238

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

2699

3239

def GetAllClients(self):

2700

3240

"D-Bus method"

2701

return dbus.Array(c.dbus_object_path

2702

for c in

2703

tcp_server.clients.itervalues())

3241

return dbus.Array(c.dbus_object_path for c in

3242

tcp_server.clients.values())

2704

3243

3244

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

3245

"true"})

2705

3246

@dbus.service.method(_interface,

2706

3247

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

2707

3248

def GetAllClientsWithProperties(self):

2708

3249

"D-Bus method"

2709

3250

return dbus.Dictionary(

2710

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

2711

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

3251

{ c.dbus_object_path: c.GetAll(

3252

"se.recompile.Mandos.Client")

3253

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

2712

3254

signature="oa{sv}")

2713

3255

2714

3256

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

2715

3257

def RemoveClient(self, object_path):

2716

3258

"D-Bus method"

2717

for c in tcp_server.clients.itervalues():

3259

for c in tcp_server.clients.values():

2718

3260

if c.dbus_object_path == object_path:

2719

3261

del tcp_server.clients[c.name]

2720

3262

c.remove_from_connection()

2721

# Don't signal anything except ClientRemoved

3263

# Don't signal the disabling

2722

3264

c.disable(quiet=True)

2723

# Emit D-Bus signal

2724

self.ClientRemoved(object_path, c.name)

3265

# Emit D-Bus signal for removal

3266

self.client_removed_signal(c)

2725

3267

return

2726

3268

raise KeyError(object_path)

2727

3269

2728

3270

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)

2729

3307

2730

3308

mandos_dbus_service = MandosDBusService()

2731

3309

2744

3322

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

2745

3323

clients = {}

2746

3324

with PGPEngine() as pgp:

2747

for client in tcp_server.clients.itervalues():

3325

for client in tcp_server.clients.values():

2748

3326

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

2749

3327

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

2750

3328

key)

2754

3332

# + secret.

2755

3333

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

2756

3334

"checker", "server_settings" }

2757

for name, typ in (inspect.getmembers

2758

(dbus.service.Object)):

3335

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

3336

.Object):

2759

3337

exclude.add(name)

2760

3338

2761

3339

client_dict["encrypted_secret"] = (client

2768

3346

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

2769

3347

2770

3348

try:

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

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

2777

3358

os.rename(tempname, stored_state_path)

2778

3359

except (IOError, OSError) as e:

2779

3360

if not debug:

2794

3375

name, client = tcp_server.clients.popitem()

2795

3376

if use_dbus:

2796

3377

client.remove_from_connection()

2797

# Don't signal anything except ClientRemoved

3378

# Don't signal the disabling

2798

3379

client.disable(quiet=True)

3380

# Emit D-Bus signal for removal

2799

3381

if use_dbus:

2800

# Emit D-Bus signal

2801

mandos_dbus_service.ClientRemoved(client

2802

.dbus_object_path,

2803

client.name)

3382

mandos_dbus_service.client_removed_signal(client)

2804

3383

client_settings.clear()

2805

3384

2806

3385

atexit.register(cleanup)

2807

3386

2808

for client in tcp_server.clients.itervalues():

3387

for client in tcp_server.clients.values():

2809

3388

if use_dbus:

2810

# Emit D-Bus signal

2811

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3389

# Emit D-Bus signal for adding

3390

mandos_dbus_service.client_added_signal(client)

2812

3391

# Need to initiate checking of clients

2813

3392

if client.enabled:

2814

3393

client.init_checker()

2840

3419

sys.exit(1)

2841

3420

# End of Avahi example code

2842

3421

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))

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))

2847

3426

2848

3427

logger.debug("Starting main loop")

2849

3428

main_loop.run()

2859

3438

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

2860

3439

cleanup()

2861

3440

3441

2862

3442

if __name__ == '__main__':

2863

3443

main()