/mandos/release : revision 237.7.392

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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 = "1.6.5"

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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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with contextlib.closing(socket.socket()) as s:

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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struct.pack(str("16s16x"),

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interface))

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interface_index = struct.unpack(str("I"),

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ifreq[16:20])[0]

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struct.pack(b"16s16x", interface))

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interface_index = struct.unpack("I", ifreq[16:20])[0]

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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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syslogger = (logging.handlers.SysLogHandler

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(facility =

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logging.handlers.SysLogHandler.LOG_DAEMON,

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address = str("/dev/log")))

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger.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

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class Avahi(object):

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

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

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

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

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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def string_array_to_txt_array(self, t):

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

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

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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

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SERVER_INVALID = 0 # avahi-common/defs.h

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SERVER_REGISTERING = 1 # avahi-common/defs.h

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SERVER_RUNNING = 2 # avahi-common/defs.h

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SERVER_COLLISION = 3 # avahi-common/defs.h

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SERVER_FAILURE = 4 # avahi-common/defs.h

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avahi = Avahi()

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class AvahiError(Exception):

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

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self.value = value

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super(AvahiError, self).__init__(value, *args, **kwargs)

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def __unicode__(self):

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return unicode(repr(self.value))

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

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**kwargs)

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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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pass

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bus: dbus.SystemBus()

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"""

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def __init__(self, interface = avahi.IF_UNSPEC, name = None,

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servicetype = None, port = None, TXT = None,

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domain = "", host = "", max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC, bus = None):

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def __init__(self,

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interface = avahi.IF_UNSPEC,

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name = None,

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servicetype = None,

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port = None,

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TXT = None,

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domain = "",

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host = "",

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max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

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self.interface = interface

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self.name = name

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self.type = servicetype

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self.bus = bus

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self.entry_group_state_changed_match = None

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342

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def rename(self):

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def rename(self, remove=True):

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

279

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if self.rename_count >= self.max_renames:

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

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = unicode(self.server

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.GetAlternativeServiceName(self.name))

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self.name = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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

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self.name)

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self.remove()

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if remove:

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

292

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

293

self.cleanup()

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os._exit(1)

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self.rename_count += 1

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if (error.get_dbus_name()

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

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

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return self.rename(remove=False)

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else:

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

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self.cleanup()

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os._exit(1)

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def remove(self):

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

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408

self.rename()

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409

elif state == avahi.ENTRY_GROUP_FAILURE:

338

410

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

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unicode(error))

340

raise AvahiGroupError("State changed: {0!s}"

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.format(error))

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str(error))

412

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

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def cleanup(self):

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

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

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

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

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bad_states = { avahi.SERVER_INVALID:

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"Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION:

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"Zeroconf server name collision",

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avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

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bad_states = {

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avahi.SERVER_INVALID: "Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION: "Zeroconf server name collision",

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avahi.SERVER_FAILURE: "Zeroconf server failure",

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}

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if state in bad_states:

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if bad_states[state] is not None:

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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"

448

" collision.")

449

return self.rename(remove=False)

450

else:

451

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

452

self.cleanup()

453

os._exit(1)

373

454

else:

374

455

if error is None:

375

456

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

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466

follow_name_owner_changes=True),

386

467

avahi.DBUS_INTERFACE_SERVER)

387

468

self.server.connect_to_signal("StateChanged",

388

self.server_state_changed)

469

self.server_state_changed)

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470

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

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471

391

472

392

473

class AvahiServiceToSyslog(AvahiService):

393

def rename(self):

474

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

394

475

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

395

ret = AvahiService.rename(self)

396

syslogger.setFormatter(logging.Formatter

397

('Mandos ({0}) [%(process)d]:'

398

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

399

.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)))

400

480

return ret

401

481

402

403

def timedelta_to_milliseconds(td):

404

"Convert a datetime.timedelta() to milliseconds"

405

return ((td.days * 24 * 60 * 60 * 1000)

406

+ (td.seconds * 1000)

407

+ (td.microseconds // 1000))

408

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()

409

746

410

747

class Client(object):

411

748

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

417

754

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

418

755

to see if the client lives.

419

756

'None' if no process is running.

420

checker_callback_tag: a gobject event source tag, or None

757

checker_callback_tag: a GLib event source tag, or None

421

758

checker_command: string; External command which is run to check

422

759

if client lives. %() expansions are done at

423

760

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

424

761

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

425

checker_initiator_tag: a gobject event source tag, or None

762

checker_initiator_tag: a GLib event source tag, or None

426

763

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

427

764

client_structure: Object describing what attributes a client has

428

765

and is used for storing the client at exit

429

766

current_checker_command: string; current running checker_command

430

disable_initiator_tag: a gobject event source tag, or None

767

disable_initiator_tag: a GLib event source tag, or None

431

768

enabled: bool()

432

769

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

433

770

uniquely identify the client

438

775

last_checker_status: integer between 0 and 255 reflecting exit

439

776

status of last checker. -1 reflects crashed

440

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

441

780

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

442

781

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

443

782

D-Bus identifiers

456

795

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

457

796

"last_approval_request", "last_checked_ok",

458

797

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

459

client_defaults = { "timeout": "PT5M",

460

"extended_timeout": "PT15M",

461

"interval": "PT2M",

462

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

463

"host": "",

464

"approval_delay": "PT0S",

465

"approval_duration": "PT1S",

466

"approved_by_default": "True",

467

"enabled": "True",

468

}

469

470

def timeout_milliseconds(self):

471

"Return the 'timeout' attribute in milliseconds"

472

return timedelta_to_milliseconds(self.timeout)

473

474

def extended_timeout_milliseconds(self):

475

"Return the 'extended_timeout' attribute in milliseconds"

476

return timedelta_to_milliseconds(self.extended_timeout)

477

478

def interval_milliseconds(self):

479

"Return the 'interval' attribute in milliseconds"

480

return timedelta_to_milliseconds(self.interval)

481

482

def approval_delay_milliseconds(self):

483

return timedelta_to_milliseconds(self.approval_delay)

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

}

484

809

485

810

@staticmethod

486

811

def config_parser(config):

502

827

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

503

828

"enabled")

504

829

830

# Uppercase and remove spaces from fingerprint for later

831

# comparison purposes with return value from the

832

# fingerprint() function

505

833

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

506

834

.replace(" ", ""))

507

835

if "secret" in section:

508

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

836

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

837

.encode("utf-8"),

838

"base64")

509

839

elif "secfile" in section:

510

840

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

511

841

(section["secfile"])),

512

842

"rb") as secfile:

513

843

client["secret"] = secfile.read()

514

844

else:

515

raise TypeError("No secret or secfile for section {0}"

845

raise TypeError("No secret or secfile for section {}"

516

846

.format(section))

517

847

client["timeout"] = string_to_delta(section["timeout"])

518

848

client["extended_timeout"] = string_to_delta(

535

865

server_settings = {}

536

866

self.server_settings = server_settings

537

867

# adding all client settings

538

for setting, value in settings.iteritems():

868

for setting, value in settings.items():

539

869

setattr(self, setting, value)

540

870

541

871

if self.enabled:

549

879

self.expires = None

550

880

551

881

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

552

# Uppercase and remove spaces from fingerprint for later

553

# comparison purposes with return value from the fingerprint()

554

# function

555

882

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

556

883

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

557

884

datetime.datetime.utcnow())

564

891

self.current_checker_command = None

565

892

self.approved = None

566

893

self.approvals_pending = 0

567

self.changedstate = (multiprocessing_manager

568

.Condition(multiprocessing_manager

569

.Lock()))

570

self.client_structure = [attr for attr in

571

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()

572

898

if not attr.startswith("_")]

573

899

self.client_structure.append("client_structure")

574

900

575

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

576

lambda obj:

577

isinstance(obj,

578

property)):

901

for name, t in inspect.getmembers(

902

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

579

903

if not name.startswith("_"):

580

904

self.client_structure.append(name)

581

905

602

926

if not quiet:

603

927

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

604

928

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

605

gobject.source_remove(self.disable_initiator_tag)

929

GLib.source_remove(self.disable_initiator_tag)

606

930

self.disable_initiator_tag = None

607

931

self.expires = None

608

932

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

609

gobject.source_remove(self.checker_initiator_tag)

933

GLib.source_remove(self.checker_initiator_tag)

610

934

self.checker_initiator_tag = None

611

935

self.stop_checker()

612

936

self.enabled = False

613

937

if not quiet:

614

938

self.send_changedstate()

615

# 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

616

940

return False

617

941

618

942

def __del__(self):

622

946

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

623

947

# and every interval from then on.

624

948

if self.checker_initiator_tag is not None:

625

gobject.source_remove(self.checker_initiator_tag)

626

self.checker_initiator_tag = (gobject.timeout_add

627

(self.interval_milliseconds(),

628

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)

629

953

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

630

954

if self.disable_initiator_tag is not None:

631

gobject.source_remove(self.disable_initiator_tag)

632

self.disable_initiator_tag = (gobject.timeout_add

633

(self.timeout_milliseconds(),

634

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)

635

958

# Also start a new checker *right now*.

636

959

self.start_checker()

637

960

638

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

961

def checker_callback(self, source, condition, connection,

962

command):

639

963

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

640

964

self.checker_callback_tag = None

641

965

self.checker = None

642

if os.WIFEXITED(condition):

643

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

644

973

if self.last_checker_status == 0:

645

974

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

646

975

vars(self))

647

976

self.checked_ok()

648

977

else:

649

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

650

vars(self))

978

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

651

979

else:

652

980

self.last_checker_status = -1

981

self.last_checker_signal = -returncode

653

982

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

654

983

vars(self))

984

return False

655

985

656

986

def checked_ok(self):

657

987

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

658

988

self.last_checked_ok = datetime.datetime.utcnow()

659

989

self.last_checker_status = 0

990

self.last_checker_signal = None

660

991

self.bump_timeout()

661

992

662

993

def bump_timeout(self, timeout=None):

664

995

if timeout is None:

665

996

timeout = self.timeout

666

997

if self.disable_initiator_tag is not None:

667

gobject.source_remove(self.disable_initiator_tag)

998

GLib.source_remove(self.disable_initiator_tag)

668

999

self.disable_initiator_tag = None

669

1000

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

670

self.disable_initiator_tag = (gobject.timeout_add

671

(timedelta_to_milliseconds

672

(timeout), self.disable))

1001

self.disable_initiator_tag = GLib.timeout_add(

1002

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

673

1003

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

674

1004

675

1005

def need_approval(self):

689

1019

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

690

1020

# should be.

691

1021

692

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

693

try:

694

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

695

except AttributeError:

696

pass

697

except OSError as error:

698

if error.errno != errno.ECHILD:

699

raise

700

else:

701

if pid:

702

logger.warning("Checker was a zombie")

703

gobject.source_remove(self.checker_callback_tag)

704

self.checker_callback(pid, status,

705

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

706

1026

# Start a new checker if needed

707

1027

if self.checker is None:

708

1028

# Escape attributes for the shell

709

escaped_attrs = dict(

710

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

711

for attr in

712

self.runtime_expansions)

1029

escaped_attrs = {

1030

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

1031

for attr in self.runtime_expansions }

713

1032

try:

714

1033

command = self.checker_command % escaped_attrs

715

1034

except TypeError as error:

716

1035

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

717

self.checker_command, exc_info=error)

718

return True # Try again later

1036

self.checker_command,

1037

exc_info=error)

1038

return True # Try again later

719

1039

self.current_checker_command = command

720

try:

721

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

722

command, self.name)

723

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

724

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

725

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

726

# always replaced by /dev/null.)

727

# The exception is when not debugging but nevertheless

728

# running in the foreground; use the previously

729

# created wnull.

730

popen_args = {}

731

if (not self.server_settings["debug"]

732

and self.server_settings["foreground"]):

733

popen_args.update({"stdout": wnull,

734

"stderr": wnull })

735

self.checker = subprocess.Popen(command,

736

close_fds=True,

737

shell=True, cwd="/",

738

**popen_args)

739

except OSError as error:

740

logger.error("Failed to start subprocess",

741

exc_info=error)

742

return True

743

self.checker_callback_tag = (gobject.child_watch_add

744

(self.checker.pid,

745

self.checker_callback,

746

data=command))

747

# The checker may have completed before the gobject

748

# watch was added. Check for this.

749

try:

750

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

751

except OSError as error:

752

if error.errno == errno.ECHILD:

753

# This should never happen

754

logger.error("Child process vanished",

755

exc_info=error)

756

return True

757

raise

758

if pid:

759

gobject.source_remove(self.checker_callback_tag)

760

self.checker_callback(pid, status, command)

761

# 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

762

1066

return True

763

1067

764

1068

def stop_checker(self):

765

1069

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

766

1070

if self.checker_callback_tag:

767

gobject.source_remove(self.checker_callback_tag)

1071

GLib.source_remove(self.checker_callback_tag)

768

1072

self.checker_callback_tag = None

769

1073

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

770

1074

return

771

1075

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

772

try:

773

self.checker.terminate()

774

#time.sleep(0.5)

775

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

776

# self.checker.kill()

777

except OSError as error:

778

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

779

raise

1076

self.checker.terminate()

780

1077

self.checker = None

781

1078

782

1079

783

def dbus_service_property(dbus_interface, signature="v",

784

access="readwrite", byte_arrays=False):

1080

def dbus_service_property(dbus_interface,

1081

signature="v",

1082

access="readwrite",

1083

byte_arrays=False):

785

1084

"""Decorators for marking methods of a DBusObjectWithProperties to

786

1085

become properties on the D-Bus.

787

1086

796

1095

# "Set" method, so we fail early here:

797

1096

if byte_arrays and signature != "ay":

798

1097

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

799

" signature {0!r}".format(signature))

1098

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

1099

800

1100

def decorator(func):

801

1101

func._dbus_is_property = True

802

1102

func._dbus_interface = dbus_interface

807

1107

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

808

1108

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

809

1109

return func

1110

810

1111

return decorator

811

1112

812

1113

821

1122

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

822

1123

"false"}

823

1124

"""

1125

824

1126

def decorator(func):

825

1127

func._dbus_is_interface = True

826

1128

func._dbus_interface = dbus_interface

827

1129

func._dbus_name = dbus_interface

828

1130

return func

1131

829

1132

return decorator

830

1133

831

1134

833

1136

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

834

1137

Usage:

835

1138

1139

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

1140

"org.freedesktop.DBus.Property."

1141

"EmitsChangedSignal": "false"})

836

1142

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

837

1143

access="r")

838

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

839

"org.freedesktop.DBus.Property."

840

"EmitsChangedSignal": "false"})

841

1144

def Property_dbus_property(self):

842

1145

return dbus.Boolean(False)

1146

1147

See also the DBusObjectWithAnnotations class.

843

1148

"""

1149

844

1150

def decorator(func):

845

1151

func._dbus_annotations = annotations

846

1152

return func

1153

847

1154

return decorator

848

1155

849

1156

850

1157

class DBusPropertyException(dbus.exceptions.DBusException):

851

1158

"""A base class for D-Bus property-related exceptions

852

1159

"""

853

def __unicode__(self):

854

return unicode(str(self))

1160

pass

855

1161

856

1162

857

1163

class DBusPropertyAccessException(DBusPropertyException):

866

1172

pass

867

1173

868

1174

869

class DBusObjectWithProperties(dbus.service.Object):

870

"""A D-Bus object with properties.

1175

class DBusObjectWithAnnotations(dbus.service.Object):

1176

"""A D-Bus object with annotations.

871

1177

872

Classes inheriting from this can use the dbus_service_property

873

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

874

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.

875

1180

"""

876

1181

877

1182

@staticmethod

881

1186

If called like _is_dbus_thing("method") it returns a function

882

1187

suitable for use as predicate to inspect.getmembers().

883

1188

"""

884

return lambda obj: getattr(obj, "_dbus_is_{0}".format(thing),

1189

return lambda obj: getattr(obj, "_dbus_is_{}".format(thing),

885

1190

False)

886

1191

887

1192

def _get_all_dbus_things(self, thing):

888

1193

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

889

1194

"""

890

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

891

name),

1195

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

892

1196

athing.__get__(self))

893

1197

for cls in self.__class__.__mro__

894

1198

for name, athing in

895

inspect.getmembers(cls,

896

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

"""

897

1271

898

1272

def _get_dbus_property(self, interface_name, property_name):

899

1273

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

900

1274

property with the specified name and interface.

901

1275

"""

902

for cls in self.__class__.__mro__:

903

for name, value in (inspect.getmembers

904

(cls,

905

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")):

906

1279

if (value._dbus_name == property_name

907

1280

and value._dbus_interface == interface_name):

908

1281

return value.__get__(self)

909

1282

910

1283

# No such property

911

raise DBusPropertyNotFound(self.dbus_object_path + ":"

912

+ interface_name + "."

913

+ property_name)

914

915

@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",

916

1298

out_signature="v")

917

1299

def Get(self, interface_name, property_name):

918

1300

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

937

1319

# signatures other than "ay".

938

1320

if prop._dbus_signature != "ay":

939

1321

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

940

"'ay' signature {0!r}"

1322

"'ay' signature {!r}"

941

1323

.format(prop._dbus_signature))

942

1324

value = dbus.ByteArray(b''.join(chr(byte)

943

1325

for byte in value))

944

1326

prop(value)

945

1327

946

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

1328

@dbus.service.method(dbus.PROPERTIES_IFACE,

1329

in_signature="s",

947

1330

out_signature="a{sv}")

948

1331

def GetAll(self, interface_name):

949

1332

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

964

1347

if not hasattr(value, "variant_level"):

965

1348

properties[name] = value

966

1349

continue

967

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

968

value.variant_level+1)

1350

properties[name] = type(value)(

1351

value, variant_level = value.variant_level + 1)

969

1352

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

970

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

971

1362

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

972

1363

out_signature="s",

973

1364

path_keyword='object_path',

977

1368

978

1369

Inserts property tags and interface annotation tags.

979

1370

"""

980

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

981

connection)

1371

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1372

object_path,

1373

connection)

982

1374

try:

983

1375

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

1376

984

1377

def make_tag(document, name, prop):

985

1378

e = document.createElement("property")

986

1379

e.setAttribute("name", name)

987

1380

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

988

1381

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

989

1382

return e

1383

990

1384

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

991

1385

# Add property tags

992

1386

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

995

1389

if prop._dbus_interface

996

1390

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

997

1391

if_tag.appendChild(tag)

998

# Add annotation tags

999

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

1000

for tag in if_tag.getElementsByTagName(typ):

1001

annots = dict()

1002

for name, prop in (self.

1003

_get_all_dbus_things(typ)):

1004

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

1005

and prop._dbus_interface

1006

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

1007

annots.update(getattr

1008

(prop,

1009

"_dbus_annotations",

1010

{}))

1011

for name, value in annots.iteritems():

1012

ann_tag = document.createElement(

1013

"annotation")

1014

ann_tag.setAttribute("name", name)

1015

ann_tag.setAttribute("value", value)

1016

tag.appendChild(ann_tag)

1017

# Add interface annotation tags

1018

for annotation, value in dict(

1019

itertools.chain.from_iterable(

1020

annotations().iteritems()

1021

for name, annotations in

1022

self._get_all_dbus_things("interface")

1023

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

1024

)).iteritems():

1025

ann_tag = document.createElement("annotation")

1026

ann_tag.setAttribute("name", annotation)

1027

ann_tag.setAttribute("value", value)

1028

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)

1029

1408

# Add the names to the return values for the

1030

1409

# "org.freedesktop.DBus.Properties" methods

1031

1410

if (if_tag.getAttribute("name")

1049

1428

exc_info=error)

1050

1429

return xmlstring

1051

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

1052

1499

1053

1500

def datetime_to_dbus(dt, variant_level=0):

1054

1501

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

1055

1502

if dt is None:

1056

1503

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

1057

return dbus.String(dt.isoformat(),

1058

variant_level=variant_level)

1504

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

1059

1505

1060

1506

1061

1507

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1081

1527

(from DBusObjectWithProperties) and interfaces (from the

1082

1528

dbus_interface_annotations decorator).

1083

1529

"""

1530

1084

1531

def wrapper(cls):

1085

1532

for orig_interface_name, alt_interface_name in (

1086

alt_interface_names.iteritems()):

1533

alt_interface_names.items()):

1087

1534

attr = {}

1088

1535

interface_names = set()

1089

1536

# Go though all attributes of the class

1091

1538

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

1092

1539

# with the wrong interface name

1093

1540

if (not hasattr(attribute, "_dbus_interface")

1094

or not attribute._dbus_interface

1095

.startswith(orig_interface_name)):

1541

or not attribute._dbus_interface.startswith(

1542

orig_interface_name)):

1096

1543

continue

1097

1544

# Create an alternate D-Bus interface name based on

1098

1545

# the current name

1099

alt_interface = (attribute._dbus_interface

1100

.replace(orig_interface_name,

1101

alt_interface_name))

1546

alt_interface = attribute._dbus_interface.replace(

1547

orig_interface_name, alt_interface_name)

1102

1548

interface_names.add(alt_interface)

1103

1549

# Is this a D-Bus signal?

1104

1550

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

1105

1551

# Extract the original non-method undecorated

1106

1552

# function by black magic

1107

nonmethod_func = (dict(

1553

if sys.version_info.major == 2:

1554

nonmethod_func = (dict(

1108

1555

zip(attribute.func_code.co_freevars,

1109

attribute.__closure__))["func"]

1110

.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)

1111

1563

# Create a new, but exactly alike, function

1112

1564

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

1113

1565

# with the alternate D-Bus interface name

1114

new_function = (dbus.service.signal

1115

(alt_interface,

1116

attribute._dbus_signature)

1117

(types.FunctionType(

1118

nonmethod_func.func_code,

1119

nonmethod_func.func_globals,

1120

nonmethod_func.func_name,

1121

nonmethod_func.func_defaults,

1122

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))

1123

1570

# Copy annotations, if any

1124

1571

try:

1125

new_function._dbus_annotations = (

1126

dict(attribute._dbus_annotations))

1572

new_function._dbus_annotations = dict(

1573

attribute._dbus_annotations)

1127

1574

except AttributeError:

1128

1575

pass

1129

1576

# Define a creator of a function to call both the

1134

1581

"""This function is a scope container to pass

1135

1582

func1 and func2 to the "call_both" function

1136

1583

outside of its arguments"""

1584

1585

@functools.wraps(func2)

1137

1586

def call_both(*args, **kwargs):

1138

1587

"""This function will emit two D-Bus

1139

1588

signals by calling func1 and func2"""

1140

1589

func1(*args, **kwargs)

1141

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

1142

1596

return call_both

1143

1597

# Create the "call_both" function and add it to

1144

1598

# the class

1149

1603

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

1150

1604

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

1151

1605

# to the class.

1152

attr[attrname] = (dbus.service.method

1153

(alt_interface,

1154

attribute._dbus_in_signature,

1155

attribute._dbus_out_signature)

1156

(types.FunctionType

1157

(attribute.func_code,

1158

attribute.func_globals,

1159

attribute.func_name,

1160

attribute.func_defaults,

1161

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)))

1162

1612

# Copy annotations, if any

1163

1613

try:

1164

attr[attrname]._dbus_annotations = (

1165

dict(attribute._dbus_annotations))

1614

attr[attrname]._dbus_annotations = dict(

1615

attribute._dbus_annotations)

1166

1616

except AttributeError:

1167

1617

pass

1168

1618

# Is this a D-Bus property?

1171

1621

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

1172

1622

# property with the alternate D-Bus interface

1173

1623

# name. Add it to the class.

1174

attr[attrname] = (dbus_service_property

1175

(alt_interface,

1176

attribute._dbus_signature,

1177

attribute._dbus_access,

1178

attribute

1179

._dbus_get_args_options

1180

["byte_arrays"])

1181

(types.FunctionType

1182

(attribute.func_code,

1183

attribute.func_globals,

1184

attribute.func_name,

1185

attribute.func_defaults,

1186

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)))

1187

1630

# Copy annotations, if any

1188

1631

try:

1189

attr[attrname]._dbus_annotations = (

1190

dict(attribute._dbus_annotations))

1632

attr[attrname]._dbus_annotations = dict(

1633

attribute._dbus_annotations)

1191

1634

except AttributeError:

1192

1635

pass

1193

1636

# Is this a D-Bus interface?

1196

1639

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

1197

1640

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

1198

1641

# to the class.

1199

attr[attrname] = (dbus_interface_annotations

1200

(alt_interface)

1201

(types.FunctionType

1202

(attribute.func_code,

1203

attribute.func_globals,

1204

attribute.func_name,

1205

attribute.func_defaults,

1206

attribute.func_closure)))

1642

attr[attrname] = (

1643

dbus_interface_annotations(alt_interface)

1644

(copy_function(attribute)))

1207

1645

if deprecate:

1208

1646

# Deprecate all alternate interfaces

1209

iname="_AlternateDBusNames_interface_annotation{0}"

1647

iname="_AlternateDBusNames_interface_annotation{}"

1210

1648

for interface_name in interface_names:

1649

1211

1650

@dbus_interface_annotations(interface_name)

1212

1651

def func(self):

1213

1652

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

1214

"true" }

1653

"true" }

1215

1654

# Find an unused name

1216

1655

for aname in (iname.format(i)

1217

1656

for i in itertools.count()):

1221

1660

if interface_names:

1222

1661

# Replace the class with a new subclass of it with

1223

1662

# methods, signals, etc. as created above.

1224

cls = type(b"{0}Alternate".format(cls.__name__),

1225

(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)

1226

1669

return cls

1670

1227

1671

return wrapper

1228

1672

1229

1673

1230

1674

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

1231

"se.bsnet.fukt.Mandos"})

1675

"se.bsnet.fukt.Mandos"})

1232

1676

class ClientDBus(Client, DBusObjectWithProperties):

1233

1677

"""A Client class using D-Bus

1234

1678

1238

1682

"""

1239

1683

1240

1684

runtime_expansions = (Client.runtime_expansions

1241

+ ("dbus_object_path",))

1685

+ ("dbus_object_path", ))

1686

1687

_interface = "se.recompile.Mandos.Client"

1242

1688

1243

1689

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

1244

1690

1247

1693

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

1248

1694

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

1249

1695

# the D-Bus

1250

client_object_name = unicode(self.name).translate(

1696

client_object_name = str(self.name).translate(

1251

1697

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

1252

1698

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

1253

self.dbus_object_path = (dbus.ObjectPath

1254

("/clients/" + client_object_name))

1699

self.dbus_object_path = dbus.ObjectPath(

1700

"/clients/" + client_object_name)

1255

1701

DBusObjectWithProperties.__init__(self, self.bus,

1256

1702

self.dbus_object_path)

1257

1703

1258

def notifychangeproperty(transform_func,

1259

dbus_name, type_func=lambda x: x,

1260

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):

1261

1709

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

1262

1710

its changes to DBus.

1263

1711

1268

1716

to the D-Bus. Default: no transform

1269

1717

variant_level: D-Bus variant level. Default: 1

1270

1718

"""

1271

attrname = "_{0}".format(dbus_name)

1719

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

1720

1272

1721

def setter(self, value):

1273

1722

if hasattr(self, "dbus_object_path"):

1274

1723

if (not hasattr(self, attrname) or

1275

1724

type_func(getattr(self, attrname, None))

1276

1725

!= type_func(value)):

1277

dbus_value = transform_func(type_func(value),

1278

variant_level

1279

=variant_level)

1280

self.PropertyChanged(dbus.String(dbus_name),

1281

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())

1282

1741

setattr(self, attrname, value)

1283

1742

1284

1743

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

1290

1749

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

1291

1750

last_enabled = notifychangeproperty(datetime_to_dbus,

1292

1751

"LastEnabled")

1293

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

1294

type_func = lambda checker:

1295

checker is not None)

1752

checker = notifychangeproperty(

1753

dbus.Boolean, "CheckerRunning",

1754

type_func = lambda checker: checker is not None)

1296

1755

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1297

1756

"LastCheckedOK")

1298

1757

last_checker_status = notifychangeproperty(dbus.Int16,

1301

1760

datetime_to_dbus, "LastApprovalRequest")

1302

1761

approved_by_default = notifychangeproperty(dbus.Boolean,

1303

1762

"ApprovedByDefault")

1304

approval_delay = notifychangeproperty(dbus.UInt64,

1305

"ApprovalDelay",

1306

type_func =

1307

timedelta_to_milliseconds)

1763

approval_delay = notifychangeproperty(

1764

dbus.UInt64, "ApprovalDelay",

1765

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

1308

1766

approval_duration = notifychangeproperty(

1309

1767

dbus.UInt64, "ApprovalDuration",

1310

type_func = timedelta_to_milliseconds)

1768

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

1311

1769

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

1312

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

1313

type_func =

1314

timedelta_to_milliseconds)

1770

timeout = notifychangeproperty(

1771

dbus.UInt64, "Timeout",

1772

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

1315

1773

extended_timeout = notifychangeproperty(

1316

1774

dbus.UInt64, "ExtendedTimeout",

1317

type_func = timedelta_to_milliseconds)

1318

interval = notifychangeproperty(dbus.UInt64,

1319

"Interval",

1320

type_func =

1321

timedelta_to_milliseconds)

1775

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

1776

interval = notifychangeproperty(

1777

dbus.UInt64, "Interval",

1778

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

1322

1779

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

1780

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

1781

invalidate_only=True)

1323

1782

1324

1783

del notifychangeproperty

1325

1784

1332

1791

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

1333

1792

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

1334

1793

1335

def checker_callback(self, pid, condition, command,

1336

*args, **kwargs):

1337

self.checker_callback_tag = None

1338

self.checker = None

1339

if os.WIFEXITED(condition):

1340

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:

1341

1801

# Emit D-Bus signal

1342

1802

self.CheckerCompleted(dbus.Int16(exitstatus),

1343

dbus.Int64(condition),

1803

# This is specific to GNU libC

1804

dbus.Int64(exitstatus << 8),

1344

1805

dbus.String(command))

1345

1806

else:

1346

1807

# Emit D-Bus signal

1347

1808

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

1348

dbus.Int64(condition),

1809

dbus.Int64(

1810

# This is specific to GNU libC

1811

(exitstatus << 8)

1812

| self.last_checker_signal),

1349

1813

dbus.String(command))

1350

1351

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

1352

*args, **kwargs)

1814

return ret

1353

1815

1354

1816

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

1355

1817

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

1367

1829

1368

1830

def approve(self, value=True):

1369

1831

self.approved = value

1370

gobject.timeout_add(timedelta_to_milliseconds

1371

(self.approval_duration),

1372

self._reset_approved)

1832

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

1833

* 1000), self._reset_approved)

1373

1834

self.send_changedstate()

1374

1835

1375

1836

## D-Bus methods, signals & properties

1376

_interface = "se.recompile.Mandos.Client"

1377

1837

1378

1838

## Interfaces

1379

1839

1380

@dbus_interface_annotations(_interface)

1381

def _foo(self):

1382

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

1383

"false"}

1384

1385

1840

## Signals

1386

1841

1387

1842

# CheckerCompleted - signal

1397

1852

pass

1398

1853

1399

1854

# PropertyChanged - signal

1855

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

1400

1856

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

1401

1857

def PropertyChanged(self, property, value):

1402

1858

"D-Bus signal"

1436

1892

self.checked_ok()

1437

1893

1438

1894

# Enable - method

1895

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

1439

1896

@dbus.service.method(_interface)

1440

1897

def Enable(self):

1441

1898

"D-Bus method"

1442

1899

self.enable()

1443

1900

1444

1901

# StartChecker - method

1902

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

1445

1903

@dbus.service.method(_interface)

1446

1904

def StartChecker(self):

1447

1905

"D-Bus method"

1448

1906

self.start_checker()

1449

1907

1450

1908

# Disable - method

1909

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

1451

1910

@dbus.service.method(_interface)

1452

1911

def Disable(self):

1453

1912

"D-Bus method"

1454

1913

self.disable()

1455

1914

1456

1915

# StopChecker - method

1916

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

1457

1917

@dbus.service.method(_interface)

1458

1918

def StopChecker(self):

1459

1919

self.stop_checker()

1466

1926

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

1467

1927

1468

1928

# ApprovedByDefault - property

1469

@dbus_service_property(_interface, signature="b",

1929

@dbus_service_property(_interface,

1930

signature="b",

1470

1931

access="readwrite")

1471

1932

def ApprovedByDefault_dbus_property(self, value=None):

1472

1933

if value is None: # get

1474

1935

self.approved_by_default = bool(value)

1475

1936

1476

1937

# ApprovalDelay - property

1477

@dbus_service_property(_interface, signature="t",

1938

@dbus_service_property(_interface,

1939

signature="t",

1478

1940

access="readwrite")

1479

1941

def ApprovalDelay_dbus_property(self, value=None):

1480

1942

if value is None: # get

1481

return dbus.UInt64(self.approval_delay_milliseconds())

1943

return dbus.UInt64(self.approval_delay.total_seconds()

1944

* 1000)

1482

1945

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

1483

1946

1484

1947

# ApprovalDuration - property

1485

@dbus_service_property(_interface, signature="t",

1948

@dbus_service_property(_interface,

1949

signature="t",

1486

1950

access="readwrite")

1487

1951

def ApprovalDuration_dbus_property(self, value=None):

1488

1952

if value is None: # get

1489

return dbus.UInt64(timedelta_to_milliseconds(

1490

self.approval_duration))

1953

return dbus.UInt64(self.approval_duration.total_seconds()

1954

* 1000)

1491

1955

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

1492

1956

1493

1957

# Name - property

1958

@dbus_annotations(

1959

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

1494

1960

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

1495

1961

def Name_dbus_property(self):

1496

1962

return dbus.String(self.name)

1497

1963

1498

1964

# Fingerprint - property

1965

@dbus_annotations(

1966

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

1499

1967

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

1500

1968

def Fingerprint_dbus_property(self):

1501

1969

return dbus.String(self.fingerprint)

1502

1970

1503

1971

# Host - property

1504

@dbus_service_property(_interface, signature="s",

1972

@dbus_service_property(_interface,

1973

signature="s",

1505

1974

access="readwrite")

1506

1975

def Host_dbus_property(self, value=None):

1507

1976

if value is None: # get

1508

1977

return dbus.String(self.host)

1509

self.host = unicode(value)

1978

self.host = str(value)

1510

1979

1511

1980

# Created - property

1981

@dbus_annotations(

1982

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

1512

1983

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

1513

1984

def Created_dbus_property(self):

1514

1985

return datetime_to_dbus(self.created)

1519

1990

return datetime_to_dbus(self.last_enabled)

1520

1991

1521

1992

# Enabled - property

1522

@dbus_service_property(_interface, signature="b",

1993

@dbus_service_property(_interface,

1994

signature="b",

1523

1995

access="readwrite")

1524

1996

def Enabled_dbus_property(self, value=None):

1525

1997

if value is None: # get

1530

2002

self.disable()

1531

2003

1532

2004

# LastCheckedOK - property

1533

@dbus_service_property(_interface, signature="s",

2005

@dbus_service_property(_interface,

2006

signature="s",

1534

2007

access="readwrite")

1535

2008

def LastCheckedOK_dbus_property(self, value=None):

1536

2009

if value is not None:

1539

2012

return datetime_to_dbus(self.last_checked_ok)

1540

2013

1541

2014

# LastCheckerStatus - property

1542

@dbus_service_property(_interface, signature="n",

1543

access="read")

2015

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

1544

2016

def LastCheckerStatus_dbus_property(self):

1545

2017

return dbus.Int16(self.last_checker_status)

1546

2018

1555

2027

return datetime_to_dbus(self.last_approval_request)

1556

2028

1557

2029

# Timeout - property

1558

@dbus_service_property(_interface, signature="t",

2030

@dbus_service_property(_interface,

2031

signature="t",

1559

2032

access="readwrite")

1560

2033

def Timeout_dbus_property(self, value=None):

1561

2034

if value is None: # get

1562

return dbus.UInt64(self.timeout_milliseconds())

2035

return dbus.UInt64(self.timeout.total_seconds() * 1000)

1563

2036

old_timeout = self.timeout

1564

2037

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

1565

2038

# Reschedule disabling

1573

2046

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

1574

2047

is None):

1575

2048

return

1576

gobject.source_remove(self.disable_initiator_tag)

1577

self.disable_initiator_tag = (

1578

gobject.timeout_add(

1579

timedelta_to_milliseconds(self.expires - now),

1580

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)

1581

2053

1582

2054

# ExtendedTimeout - property

1583

@dbus_service_property(_interface, signature="t",

2055

@dbus_service_property(_interface,

2056

signature="t",

1584

2057

access="readwrite")

1585

2058

def ExtendedTimeout_dbus_property(self, value=None):

1586

2059

if value is None: # get

1587

return dbus.UInt64(self.extended_timeout_milliseconds())

2060

return dbus.UInt64(self.extended_timeout.total_seconds()

2061

* 1000)

1588

2062

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

1589

2063

1590

2064

# Interval - property

1591

@dbus_service_property(_interface, signature="t",

2065

@dbus_service_property(_interface,

2066

signature="t",

1592

2067

access="readwrite")

1593

2068

def Interval_dbus_property(self, value=None):

1594

2069

if value is None: # get

1595

return dbus.UInt64(self.interval_milliseconds())

2070

return dbus.UInt64(self.interval.total_seconds() * 1000)

1596

2071

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

1597

2072

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

1598

2073

return

1599

2074

if self.enabled:

1600

2075

# Reschedule checker run

1601

gobject.source_remove(self.checker_initiator_tag)

1602

self.checker_initiator_tag = (gobject.timeout_add

1603

(value, self.start_checker))

1604

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

1605

2080

1606

2081

# Checker - property

1607

@dbus_service_property(_interface, signature="s",

2082

@dbus_service_property(_interface,

2083

signature="s",

1608

2084

access="readwrite")

1609

2085

def Checker_dbus_property(self, value=None):

1610

2086

if value is None: # get

1611

2087

return dbus.String(self.checker_command)

1612

self.checker_command = unicode(value)

2088

self.checker_command = str(value)

1613

2089

1614

2090

# CheckerRunning - property

1615

@dbus_service_property(_interface, signature="b",

2091

@dbus_service_property(_interface,

2092

signature="b",

1616

2093

access="readwrite")

1617

2094

def CheckerRunning_dbus_property(self, value=None):

1618

2095

if value is None: # get

1623

2100

self.stop_checker()

1624

2101

1625

2102

# ObjectPath - property

2103

@dbus_annotations(

2104

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

2105

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

1626

2106

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

1627

2107

def ObjectPath_dbus_property(self):

1628

2108

return self.dbus_object_path # is already a dbus.ObjectPath

1629

2109

1630

2110

# Secret = property

1631

@dbus_service_property(_interface, signature="ay",

1632

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)

1633

2118

def Secret_dbus_property(self, value):

1634

self.secret = str(value)

2119

self.secret = bytes(value)

1635

2120

1636

2121

del _interface

1637

2122

1641

2126

self._pipe = child_pipe

1642

2127

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

1643

2128

if not self._pipe.recv():

1644

raise KeyError()

2129

raise KeyError(fpr)

1645

2130

1646

2131

def __getattribute__(self, name):

1647

2132

if name == '_pipe':

1651

2136

if data[0] == 'data':

1652

2137

return data[1]

1653

2138

if data[0] == 'function':

2139

1654

2140

def func(*args, **kwargs):

1655

2141

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

1656

2142

return self._pipe.recv()[1]

2143

1657

2144

return func

1658

2145

1659

2146

def __setattr__(self, name, value):

1671

2158

def handle(self):

1672

2159

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

1673

2160

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

1674

unicode(self.client_address))

2161

str(self.client_address))

1675

2162

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

1676

2163

self.server.child_pipe.fileno())

1677

2164

1678

session = (gnutls.connection

1679

.ClientSession(self.request,

1680

gnutls.connection

1681

.X509Credentials()))

1682

1683

# Note: gnutls.connection.X509Credentials is really a

1684

# generic GnuTLS certificate credentials object so long as

1685

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

1686

# here despite using OpenPGP certificates.

2165

session = gnutls.ClientSession(self.request)

1687

2166

1688

2167

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

1689

2168

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

1693

2172

priority = self.server.gnutls_priority

1694

2173

if priority is None:

1695

2174

priority = "NORMAL"

1696

(gnutls.library.functions

1697

.gnutls_priority_set_direct(session._c_object,

1698

priority, None))

2175

gnutls.priority_set_direct(session._c_object, priority,

2176

None)

1699

2177

1700

2178

# Start communication using the Mandos protocol

1701

2179

# Get protocol number

1711

2189

# Start GnuTLS connection

1712

2190

try:

1713

2191

session.handshake()

1714

except gnutls.errors.GNUTLSError as error:

2192

except gnutls.Error as error:

1715

2193

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

1716

2194

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

1717

2195

# established. Just abandon the request.

1721

2199

approval_required = False

1722

2200

try:

1723

2201

try:

1724

fpr = self.fingerprint(self.peer_certificate

1725

(session))

1726

except (TypeError,

1727

gnutls.errors.GNUTLSError) as error:

2202

fpr = self.fingerprint(

2203

self.peer_certificate(session))

2204

except (TypeError, gnutls.Error) as error:

1728

2205

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

1729

2206

return

1730

2207

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

1743

2220

while True:

1744

2221

if not client.enabled:

1745

2222

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

1746

client.name)

2223

client.name)

1747

2224

if self.server.use_dbus:

1748

2225

# Emit D-Bus signal

1749

2226

client.Rejected("Disabled")

1758

2235

if self.server.use_dbus:

1759

2236

# Emit D-Bus signal

1760

2237

client.NeedApproval(

1761

client.approval_delay_milliseconds(),

1762

client.approved_by_default)

2238

client.approval_delay.total_seconds()

2239

* 1000, client.approved_by_default)

1763

2240

else:

1764

2241

logger.warning("Client %s was not approved",

1765

2242

client.name)

1771

2248

#wait until timeout or approved

1772

2249

time = datetime.datetime.now()

1773

2250

client.changedstate.acquire()

1774

client.changedstate.wait(

1775

float(timedelta_to_milliseconds(delay)

1776

/ 1000))

2251

client.changedstate.wait(delay.total_seconds())

1777

2252

client.changedstate.release()

1778

2253

time2 = datetime.datetime.now()

1779

2254

if (time2 - time) >= delay:

1790

2265

else:

1791

2266

delay -= time2 - time

1792

2267

1793

sent_size = 0

1794

while sent_size < len(client.secret):

1795

try:

1796

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

1797

except gnutls.errors.GNUTLSError as error:

1798

logger.warning("gnutls send failed",

1799

exc_info=error)

1800

return

1801

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

1802

sent, len(client.secret)

1803

- (sent_size + sent))

1804

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

1805

2274

1806

2275

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

1807

2276

# bump the timeout using extended_timeout

1815

2284

client.approvals_pending -= 1

1816

2285

try:

1817

2286

session.bye()

1818

except gnutls.errors.GNUTLSError as error:

2287

except gnutls.Error as error:

1819

2288

logger.warning("GnuTLS bye failed",

1820

2289

exc_info=error)

1821

2290

1823

2292

def peer_certificate(session):

1824

2293

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

1825

2294

# If not an OpenPGP certificate...

1826

if (gnutls.library.functions

1827

.gnutls_certificate_type_get(session._c_object)

1828

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1829

# ...do the normal thing

1830

return session.peer_certificate

2295

if (gnutls.certificate_type_get(session._c_object)

2296

!= gnutls.CRT_OPENPGP):

2297

# ...return invalid data

2298

return b""

1831

2299

list_size = ctypes.c_uint(1)

1832

cert_list = (gnutls.library.functions

1833

.gnutls_certificate_get_peers

2300

cert_list = (gnutls.certificate_get_peers

1834

2301

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

1835

2302

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

1836

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

1837

" certificate")

2303

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

1838

2304

if list_size.value == 0:

1839

2305

return None

1840

2306

cert = cert_list[0]

1844

2310

def fingerprint(openpgp):

1845

2311

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1846

2312

# New GnuTLS "datum" with the OpenPGP public key

1847

datum = (gnutls.library.types

1848

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

1849

ctypes.POINTER

1850

(ctypes.c_ubyte)),

1851

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)))

1852

2317

# New empty GnuTLS certificate

1853

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1854

(gnutls.library.functions

1855

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2318

crt = gnutls.openpgp_crt_t()

2319

gnutls.openpgp_crt_init(ctypes.byref(crt))

1856

2320

# Import the OpenPGP public key into the certificate

1857

(gnutls.library.functions

1858

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

1859

gnutls.library.constants

1860

.GNUTLS_OPENPGP_FMT_RAW))

2321

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

2322

gnutls.OPENPGP_FMT_RAW)

1861

2323

# Verify the self signature in the key

1862

2324

crtverify = ctypes.c_uint()

1863

(gnutls.library.functions

1864

.gnutls_openpgp_crt_verify_self(crt, 0,

1865

ctypes.byref(crtverify)))

2325

gnutls.openpgp_crt_verify_self(crt, 0,

2326

ctypes.byref(crtverify))

1866

2327

if crtverify.value != 0:

1867

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1868

raise (gnutls.errors.CertificateSecurityError

1869

("Verify failed"))

2328

gnutls.openpgp_crt_deinit(crt)

2329

raise gnutls.CertificateSecurityError("Verify failed")

1870

2330

# New buffer for the fingerprint

1871

2331

buf = ctypes.create_string_buffer(20)

1872

2332

buf_len = ctypes.c_size_t()

1873

2333

# Get the fingerprint from the certificate into the buffer

1874

(gnutls.library.functions

1875

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

1876

ctypes.byref(buf_len)))

2334

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

2335

ctypes.byref(buf_len))

1877

2336

# Deinit the certificate

1878

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2337

gnutls.openpgp_crt_deinit(crt)

1879

2338

# Convert the buffer to a Python bytestring

1880

2339

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

1881

2340

# Convert the bytestring to hexadecimal notation

1885

2344

1886

2345

class MultiprocessingMixIn(object):

1887

2346

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

2347

1888

2348

def sub_process_main(self, request, address):

1889

2349

try:

1890

2350

self.finish_request(request, address)

1902

2362

1903

2363

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1904

2364

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

2365

1905

2366

def process_request(self, request, client_address):

1906

2367

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

1907

2368

1928

2389

interface: None or a network interface name (string)

1929

2390

use_ipv6: Boolean; to use IPv6 or not

1930

2391

"""

2392

1931

2393

def __init__(self, server_address, RequestHandlerClass,

1932

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

2394

interface=None,

2395

use_ipv6=True,

2396

socketfd=None):

1933

2397

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

1934

2398

creating a new one with socket.socket().

1935

2399

"""

1976

2440

self.interface)

1977

2441

else:

1978

2442

try:

1979

self.socket.setsockopt(socket.SOL_SOCKET,

1980

SO_BINDTODEVICE,

1981

str(self.interface + '\0'))

2443

self.socket.setsockopt(

2444

socket.SOL_SOCKET, SO_BINDTODEVICE,

2445

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

1982

2446

except socket.error as error:

1983

2447

if error.errno == errno.EPERM:

1984

2448

logger.error("No permission to bind to"

2002

2466

self.server_address = (any_address,

2003

2467

self.server_address[1])

2004

2468

elif not self.server_address[1]:

2005

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

2006

0)

2469

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

2007

2470

# if self.interface:

2008

2471

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

2009

2472

# 0, # port

2021

2484

gnutls_priority GnuTLS priority string

2022

2485

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

2023

2486

2024

Assumes a gobject.MainLoop event loop.

2487

Assumes a GLib.MainLoop event loop.

2025

2488

"""

2489

2026

2490

def __init__(self, server_address, RequestHandlerClass,

2027

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

2028

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):

2029

2497

self.enabled = False

2030

2498

self.clients = clients

2031

2499

if self.clients is None:

2037

2505

interface = interface,

2038

2506

use_ipv6 = use_ipv6,

2039

2507

socketfd = socketfd)

2508

2040

2509

def server_activate(self):

2041

2510

if self.enabled:

2042

2511

return socketserver.TCPServer.server_activate(self)

2046

2515

2047

2516

def add_pipe(self, parent_pipe, proc):

2048

2517

# Call "handle_ipc" for both data and EOF events

2049

gobject.io_add_watch(parent_pipe.fileno(),

2050

gobject.IO_IN | gobject.IO_HUP,

2051

functools.partial(self.handle_ipc,

2052

parent_pipe =

2053

parent_pipe,

2054

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))

2055

2524

2056

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

2057

proc = None, client_object=None):

2525

def handle_ipc(self, source, condition,

2526

parent_pipe=None,

2527

proc = None,

2528

client_object=None):

2058

2529

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

2059

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

2530

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

2060

2531

# Wait for other process to exit

2061

2532

proc.join()

2062

2533

return False

2069

2540

fpr = request[1]

2070

2541

address = request[2]

2071

2542

2072

for c in self.clients.itervalues():

2543

for c in self.clients.values():

2073

2544

if c.fingerprint == fpr:

2074

2545

client = c

2075

2546

break

2083

2554

parent_pipe.send(False)

2084

2555

return False

2085

2556

2086

gobject.io_add_watch(parent_pipe.fileno(),

2087

gobject.IO_IN | gobject.IO_HUP,

2088

functools.partial(self.handle_ipc,

2089

parent_pipe =

2090

parent_pipe,

2091

proc = proc,

2092

client_object =

2093

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))

2094

2564

parent_pipe.send(True)

2095

2565

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

2096

2566

# same fileno

2102

2572

2103

2573

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

2104

2574

funcname)(*args,

2105

**kwargs)))

2575

**kwargs)))

2106

2576

2107

2577

if command == 'getattr':

2108

2578

attrname = request[1]

2109

if callable(client_object.__getattribute__(attrname)):

2110

parent_pipe.send(('function',))

2579

if isinstance(client_object.__getattribute__(attrname),

2580

collections.Callable):

2581

parent_pipe.send(('function', ))

2111

2582

else:

2112

parent_pipe.send(('data', client_object

2113

.__getattribute__(attrname)))

2583

parent_pipe.send((

2584

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

2114

2585

2115

2586

if command == 'setattr':

2116

2587

attrname = request[1]

2147

2618

# avoid excessive use of external libraries.

2148

2619

2149

2620

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

2150

Token = collections.namedtuple("Token",

2151

("regexp", # To match token; if

2152

# "value" is not None,

2153

# must have a "group"

2154

# containing digits

2155

"value", # datetime.timedelta or

2156

# None

2157

"followers")) # Tokens valid after

2158

# 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

2159

2626

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

2160

2627

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

2161

2628

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

2162

2629

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

2163

2630

datetime.timedelta(seconds=1),

2164

frozenset((token_end,)))

2631

frozenset((token_end, )))

2165

2632

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

2166

2633

datetime.timedelta(minutes=1),

2167

2634

frozenset((token_second, token_end)))

2183

2650

frozenset((token_month, token_end)))

2184

2651

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

2185

2652

datetime.timedelta(weeks=1),

2186

frozenset((token_end,)))

2653

frozenset((token_end, )))

2187

2654

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

2188

2655

frozenset((token_year, token_month,

2189

2656

token_day, token_time,

2190

token_week))),

2657

token_week)))

2191

2658

# Define starting values

2192

2659

value = datetime.timedelta() # Value so far

2193

2660

found_token = None

2194

followers = frozenset(token_duration,) # Following valid tokens

2661

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

2195

2662

s = duration # String left to parse

2196

2663

# Loop until end token is found

2197

2664

while found_token is not token_end:

2214

2681

break

2215

2682

else:

2216

2683

# No currently valid tokens were found

2217

raise ValueError("Invalid RFC 3339 duration")

2684

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

2685

.format(duration))

2218

2686

# End token found

2219

2687

return value

2220

2688

2244

2712

timevalue = datetime.timedelta(0)

2245

2713

for s in interval.split():

2246

2714

try:

2247

suffix = unicode(s[-1])

2715

suffix = s[-1]

2248

2716

value = int(s[:-1])

2249

2717

if suffix == "d":

2250

2718

delta = datetime.timedelta(value)

2257

2725

elif suffix == "w":

2258

2726

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

2259

2727

else:

2260

raise ValueError("Unknown suffix {0!r}"

2261

.format(suffix))

2728

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

2262

2729

except IndexError as e:

2263

2730

raise ValueError(*(e.args))

2264

2731

timevalue += delta

2281

2748

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

2282

2749

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

2283

2750

raise OSError(errno.ENODEV,

2284

"{0} not a character device"

2751

"{} not a character device"

2285

2752

.format(os.devnull))

2286

2753

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

2287

2754

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

2297

2764

2298

2765

parser = argparse.ArgumentParser()

2299

2766

parser.add_argument("-v", "--version", action="version",

2300

version = "%(prog)s {0}".format(version),

2767

version = "%(prog)s {}".format(version),

2301

2768

help="show version number and exit")

2302

2769

parser.add_argument("-i", "--interface", metavar="IF",

2303

2770

help="Bind to interface IF")

2336

2803

help="Directory to save/restore state in")

2337

2804

parser.add_argument("--foreground", action="store_true",

2338

2805

help="Run in foreground", default=None)

2806

parser.add_argument("--no-zeroconf", action="store_false",

2807

dest="zeroconf", help="Do not use Zeroconf",

2808

default=None)

2339

2809

2340

2810

options = parser.parse_args()

2341

2811

2350

2820

"port": "",

2351

2821

"debug": "False",

2352

2822

"priority":

2353

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

2823

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

2824

":+SIGN-DSA-SHA256",

2354

2825

"servicename": "Mandos",

2355

2826

"use_dbus": "True",

2356

2827

"use_ipv6": "True",

2359

2830

"socket": "",

2360

2831

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

2361

2832

"foreground": "False",

2362

}

2833

"zeroconf": "True",

2834

}

2363

2835

2364

2836

# Parse config file for server-global settings

2365

2837

server_config = configparser.SafeConfigParser(server_defaults)

2366

2838

del server_defaults

2367

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

2368

"mandos.conf"))

2839

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

2369

2840

# Convert the SafeConfigParser object to a dict

2370

2841

server_settings = server_config.defaults()

2371

2842

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

2389

2860

# Override the settings from the config file with command line

2390

2861

# options, if set.

2391

2862

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

2392

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

2393

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

2394

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

2863

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

2864

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

2865

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

2395

2866

value = getattr(options, option)

2396

2867

if value is not None:

2397

2868

server_settings[option] = value

2398

2869

del options

2399

2870

# Force all strings to be unicode

2400

2871

for option in server_settings.keys():

2401

if type(server_settings[option]) is str:

2402

server_settings[option] = unicode(server_settings[option])

2872

if isinstance(server_settings[option], bytes):

2873

server_settings[option] = (server_settings[option]

2874

.decode("utf-8"))

2403

2875

# Force all boolean options to be boolean

2404

2876

for option in ("debug", "use_dbus", "use_ipv6", "restore",

2405

"foreground"):

2877

"foreground", "zeroconf"):

2406

2878

server_settings[option] = bool(server_settings[option])

2407

2879

# Debug implies foreground

2408

2880

if server_settings["debug"]:

2411

2883

2412

2884

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

2413

2885

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")

2890

2414

2891

# For convenience

2415

2892

debug = server_settings["debug"]

2416

2893

debuglevel = server_settings["debuglevel"]

2419

2896

stored_state_path = os.path.join(server_settings["statedir"],

2420

2897

stored_state_file)

2421

2898

foreground = server_settings["foreground"]

2899

zeroconf = server_settings["zeroconf"]

2422

2900

2423

2901

if debug:

2424

2902

initlogger(debug, logging.DEBUG)

2430

2908

initlogger(debug, level)

2431

2909

2432

2910

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

2433

syslogger.setFormatter(logging.Formatter

2434

('Mandos ({0}) [%(process)d]:'

2435

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

2436

.format(server_settings

2437

["servicename"])))

2911

syslogger.setFormatter(

2912

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

2913

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

2914

server_settings["servicename"])))

2438

2915

2439

2916

# Parse config file with clients

2440

2917

client_config = configparser.SafeConfigParser(Client

2445

2922

global mandos_dbus_service

2446

2923

mandos_dbus_service = None

2447

2924

2448

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

2449

server_settings["port"]),

2450

ClientHandler,

2451

interface=(server_settings["interface"]

2452

or None),

2453

use_ipv6=use_ipv6,

2454

gnutls_priority=

2455

server_settings["priority"],

2456

use_dbus=use_dbus,

2457

socketfd=(server_settings["socket"]

2458

or None))

2925

socketfd = None

2926

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

2927

socketfd = server_settings["socket"]

2928

tcp_server = MandosServer(

2929

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

2930

ClientHandler,

2931

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

2932

use_ipv6=use_ipv6,

2933

gnutls_priority=server_settings["priority"],

2934

use_dbus=use_dbus,

2935

socketfd=socketfd)

2459

2936

if not foreground:

2460

2937

pidfilename = "/run/mandos.pid"

2461

2938

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

2462

2939

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

2463

2940

pidfile = None

2464

2941

try:

2465

pidfile = open(pidfilename, "w")

2942

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

2466

2943

except IOError as e:

2467

2944

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

2468

2945

exc_info=e)

2469

2946

2470

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

2947

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

2948

("mandos", "mandos"),

2949

("nobody", "nogroup")):

2471

2950

try:

2472

2951

uid = pwd.getpwnam(name).pw_uid

2473

gid = pwd.getpwnam(name).pw_gid

2952

gid = pwd.getpwnam(group).pw_gid

2474

2953

break

2475

2954

except KeyError:

2476

2955

continue

2480

2959

try:

2481

2960

os.setgid(gid)

2482

2961

os.setuid(uid)

2962

if debug:

2963

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

2964

gid))

2483

2965

except OSError as error:

2966

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

2967

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

2484

2968

if error.errno != errno.EPERM:

2485

2969

raise

2486

2970

2489

2973

2490

2974

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

2491

2975

# - GnuTLS manual

2492

gnutls.library.functions.gnutls_global_set_log_level(11)

2976

gnutls.global_set_log_level(11)

2493

2977

2494

@gnutls.library.types.gnutls_log_func

2978

@gnutls.log_func

2495

2979

def debug_gnutls(level, string):

2496

2980

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

2497

2981

2498

(gnutls.library.functions

2499

.gnutls_global_set_log_function(debug_gnutls))

2982

gnutls.global_set_log_function(debug_gnutls)

2500

2983

2501

2984

# Redirect stdin so all checkers get /dev/null

2502

2985

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

2509

2992

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

2510

2993

daemon()

2511

2994

2512

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

2513

# need to inform gobject that threads will be used.

2514

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()

2515

2998

2516

2999

global main_loop

2517

3000

# From the Avahi example code

2518

3001

DBusGMainLoop(set_as_default=True)

2519

main_loop = gobject.MainLoop()

3002

main_loop = GLib.MainLoop()

2520

3003

bus = dbus.SystemBus()

2521

3004

# End of Avahi example code

2522

3005

if use_dbus:

2523

3006

try:

2524

3007

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

2525

bus, do_not_queue=True)

2526

old_bus_name = (dbus.service.BusName

2527

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

2528

do_not_queue=True))

2529

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:

2530

3014

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

2531

3015

use_dbus = False

2532

3016

server_settings["use_dbus"] = False

2533

3017

tcp_server.use_dbus = False

2534

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2535

service = AvahiServiceToSyslog(name =

2536

server_settings["servicename"],

2537

servicetype = "_mandos._tcp",

2538

protocol = protocol, bus = bus)

2539

if server_settings["interface"]:

2540

service.interface = (if_nametoindex

2541

(str(server_settings["interface"])))

3018

if zeroconf:

3019

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3020

service = AvahiServiceToSyslog(

3021

name = server_settings["servicename"],

3022

servicetype = "_mandos._tcp",

3023

protocol = protocol,

3024

bus = bus)

3025

if server_settings["interface"]:

3026

service.interface = if_nametoindex(

3027

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

2542

3028

2543

3029

global multiprocessing_manager

2544

3030

multiprocessing_manager = multiprocessing.Manager()

2563

3049

if server_settings["restore"]:

2564

3050

try:

2565

3051

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

2566

clients_data, old_client_settings = (pickle.load

2567

(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"))

2568

3097

os.remove(stored_state_path)

2569

3098

except IOError as e:

2570

3099

if e.errno == errno.ENOENT:

2571

logger.warning("Could not load persistent state: {0}"

2572

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

3100

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

3101

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

2573

3102

else:

2574

3103

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

2575

3104

exc_info=e)

2576

3105

raise

2577

3106

except EOFError as e:

2578

3107

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

2579

"EOFError:", exc_info=e)

3108

"EOFError:",

3109

exc_info=e)

2580

3110

2581

3111

with PGPEngine() as pgp:

2582

for client_name, client in clients_data.iteritems():

3112

for client_name, client in clients_data.items():

2583

3113

# Skip removed clients

2584

3114

if client_name not in client_settings:

2585

3115

continue

2594

3124

# For each value in new config, check if it

2595

3125

# differs from the old config value (Except for

2596

3126

# the "secret" attribute)

2597

if (name != "secret" and

2598

value != old_client_settings[client_name]

2599

[name]):

3127

if (name != "secret"

3128

and (value !=

3129

old_client_settings[client_name][name])):

2600

3130

client[name] = value

2601

3131

except KeyError:

2602

3132

pass

2603

3133

2604

3134

# Clients who has passed its expire date can still be

2605

# enabled if its last checker was successful. Clients

3135

# enabled if its last checker was successful. A Client

2606

3136

# whose checker succeeded before we stored its state is

2607

3137

# assumed to have successfully run all checkers during

2608

3138

# downtime.

2610

3140

if datetime.datetime.utcnow() >= client["expires"]:

2611

3141

if not client["last_checked_ok"]:

2612

3142

logger.warning(

2613

"disabling client {0} - Client never "

2614

"performed a successful checker"

2615

.format(client_name))

3143

"disabling client {} - Client never "

3144

"performed a successful checker".format(

3145

client_name))

2616

3146

client["enabled"] = False

2617

3147

elif client["last_checker_status"] != 0:

2618

3148

logger.warning(

2619

"disabling client {0} - Client "

2620

"last checker failed with error code {1}"

2621

.format(client_name,

2622

client["last_checker_status"]))

3149

"disabling client {} - Client last"

3150

" checker failed with error code"

3151

" {}".format(

3152

client_name,

3153

client["last_checker_status"]))

2623

3154

client["enabled"] = False

2624

3155

else:

2625

client["expires"] = (datetime.datetime

2626

.utcnow()

2627

+ client["timeout"])

3156

client["expires"] = (

3157

datetime.datetime.utcnow()

3158

+ client["timeout"])

2628

3159

logger.debug("Last checker succeeded,"

2629

" keeping {0} enabled"

2630

.format(client_name))

3160

" keeping {} enabled".format(

3161

client_name))

2631

3162

try:

2632

client["secret"] = (

2633

pgp.decrypt(client["encrypted_secret"],

2634

client_settings[client_name]

2635

["secret"]))

3163

client["secret"] = pgp.decrypt(

3164

client["encrypted_secret"],

3165

client_settings[client_name]["secret"])

2636

3166

except PGPError:

2637

3167

# If decryption fails, we use secret from new settings

2638

logger.debug("Failed to decrypt {0} old secret"

2639

.format(client_name))

2640

client["secret"] = (

2641

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"])

2642

3172

2643

3173

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

2644

3174

for client_name in (set(old_client_settings)

2649

3179

clients_data[client_name] = client_settings[client_name]

2650

3180

2651

3181

# Create all client objects

2652

for client_name, client in clients_data.iteritems():

3182

for client_name, client in clients_data.items():

2653

3183

tcp_server.clients[client_name] = client_class(

2654

name = client_name, settings = client,

3184

name = client_name,

3185

settings = client,

2655

3186

server_settings = server_settings)

2656

3187

2657

3188

if not tcp_server.clients:

2659

3190

2660

3191

if not foreground:

2661

3192

if pidfile is not None:

3193

pid = os.getpid()

2662

3194

try:

2663

3195

with pidfile:

2664

pid = os.getpid()

2665

pidfile.write(str(pid) + "\n".encode("utf-8"))

3196

print(pid, file=pidfile)

2666

3197

except IOError:

2667

3198

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

2668

3199

pidfilename, pid)

2669

3200

del pidfile

2670

3201

del pidfilename

2671

3202

2672

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

2673

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)

2674

3206

2675

3207

if use_dbus:

2676

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

2677

"se.bsnet.fukt.Mandos"})

2678

class MandosDBusService(DBusObjectWithProperties):

3208

3209

@alternate_dbus_interfaces(

3210

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

3211

class MandosDBusService(DBusObjectWithObjectManager):

2679

3212

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

3213

2680

3214

def __init__(self):

2681

3215

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

3216

2682

3217

_interface = "se.recompile.Mandos"

2683

3218

2684

@dbus_interface_annotations(_interface)

2685

def _foo(self):

2686

return { "org.freedesktop.DBus.Property"

2687

".EmitsChangedSignal":

2688

"false"}

2689

2690

3219

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

2691

3220

def ClientAdded(self, objpath):

2692

3221

"D-Bus signal"

2697

3226

"D-Bus signal"

2698

3227

pass

2699

3228

3229

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

3230

"true"})

2700

3231

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

2701

3232

def ClientRemoved(self, objpath, name):

2702

3233

"D-Bus signal"

2703

3234

pass

2704

3235

3236

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

3237

"true"})

2705

3238

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

2706

3239

def GetAllClients(self):

2707

3240

"D-Bus method"

2708

return dbus.Array(c.dbus_object_path

2709

for c in

2710

tcp_server.clients.itervalues())

3241

return dbus.Array(c.dbus_object_path for c in

3242

tcp_server.clients.values())

2711

3243

3244

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

3245

"true"})

2712

3246

@dbus.service.method(_interface,

2713

3247

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

2714

3248

def GetAllClientsWithProperties(self):

2715

3249

"D-Bus method"

2716

3250

return dbus.Dictionary(

2717

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

2718

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() },

2719

3254

signature="oa{sv}")

2720

3255

2721

3256

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

2722

3257

def RemoveClient(self, object_path):

2723

3258

"D-Bus method"

2724

for c in tcp_server.clients.itervalues():

3259

for c in tcp_server.clients.values():

2725

3260

if c.dbus_object_path == object_path:

2726

3261

del tcp_server.clients[c.name]

2727

3262

c.remove_from_connection()

2728

# Don't signal anything except ClientRemoved

3263

# Don't signal the disabling

2729

3264

c.disable(quiet=True)

2730

# Emit D-Bus signal

2731

self.ClientRemoved(object_path, c.name)

3265

# Emit D-Bus signal for removal

3266

self.client_removed_signal(c)

2732

3267

return

2733

3268

raise KeyError(object_path)

2734

3269

2735

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)

2736

3307

2737

3308

mandos_dbus_service = MandosDBusService()

2738

3309

2739

3310

def cleanup():

2740

3311

"Cleanup function; run on exit"

2741

service.cleanup()

3312

if zeroconf:

3313

service.cleanup()

2742

3314

2743

3315

multiprocessing.active_children()

2744

3316

wnull.close()

2750

3322

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

2751

3323

clients = {}

2752

3324

with PGPEngine() as pgp:

2753

for client in tcp_server.clients.itervalues():

3325

for client in tcp_server.clients.values():

2754

3326

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

2755

3327

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

2756

3328

key)

2758

3330

2759

3331

# A list of attributes that can not be pickled

2760

3332

# + secret.

2761

exclude = set(("bus", "changedstate", "secret",

2762

"checker", "server_settings"))

2763

for name, typ in (inspect.getmembers

2764

(dbus.service.Object)):

3333

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

3334

"checker", "server_settings" }

3335

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

3336

.Object):

2765

3337

exclude.add(name)

2766

3338

2767

3339

client_dict["encrypted_secret"] = (client

2774

3346

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

2775

3347

2776

3348

try:

2777

with (tempfile.NamedTemporaryFile

2778

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

2779

dir=os.path.dirname(stored_state_path),

2780

delete=False)) as stored_state:

2781

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

2782

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

2783

3358

os.rename(tempname, stored_state_path)

2784

3359

except (IOError, OSError) as e:

2785

3360

if not debug:

2788

3363

except NameError:

2789

3364

pass

2790

3365

if e.errno in (errno.ENOENT, errno.EACCES, errno.EEXIST):

2791

logger.warning("Could not save persistent state: {0}"

3366

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

2792

3367

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

2793

3368

else:

2794

3369

logger.warning("Could not save persistent state:",

2800

3375

name, client = tcp_server.clients.popitem()

2801

3376

if use_dbus:

2802

3377

client.remove_from_connection()

2803

# Don't signal anything except ClientRemoved

3378

# Don't signal the disabling

2804

3379

client.disable(quiet=True)

3380

# Emit D-Bus signal for removal

2805

3381

if use_dbus:

2806

# Emit D-Bus signal

2807

mandos_dbus_service.ClientRemoved(client

2808

.dbus_object_path,

2809

client.name)

3382

mandos_dbus_service.client_removed_signal(client)

2810

3383

client_settings.clear()

2811

3384

2812

3385

atexit.register(cleanup)

2813

3386

2814

for client in tcp_server.clients.itervalues():

3387

for client in tcp_server.clients.values():

2815

3388

if use_dbus:

2816

# Emit D-Bus signal

2817

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3389

# Emit D-Bus signal for adding

3390

mandos_dbus_service.client_added_signal(client)

2818

3391

# Need to initiate checking of clients

2819

3392

if client.enabled:

2820

3393

client.init_checker()

2823

3396

tcp_server.server_activate()

2824

3397

2825

3398

# Find out what port we got

2826

service.port = tcp_server.socket.getsockname()[1]

3399

if zeroconf:

3400

service.port = tcp_server.socket.getsockname()[1]

2827

3401

if use_ipv6:

2828

3402

logger.info("Now listening on address %r, port %d,"

2829

3403

" flowinfo %d, scope_id %d",

2835

3409

#service.interface = tcp_server.socket.getsockname()[3]

2836

3410

2837

3411

try:

2838

# From the Avahi example code

2839

try:

2840

service.activate()

2841

except dbus.exceptions.DBusException as error:

2842

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

2843

cleanup()

2844

sys.exit(1)

2845

# End of Avahi example code

3412

if zeroconf:

3413

# From the Avahi example code

3414

try:

3415

service.activate()

3416

except dbus.exceptions.DBusException as error:

3417

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

3418

cleanup()

3419

sys.exit(1)

3420

# End of Avahi example code

2846

3421

2847

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

2848

lambda *args, **kwargs:

2849

(tcp_server.handle_request

2850

(*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))

2851

3426

2852

3427

logger.debug("Starting main loop")

2853

3428

main_loop.run()

2863

3438

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

2864

3439

cleanup()

2865

3440

3441

2866

3442

if __name__ == '__main__':

2867

3443

main()