/mandos/trunk : revision 539

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

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#

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# Everything else is

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#

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

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

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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try:

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from future_builtins import *

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except ImportError:

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pass

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import SocketServer as socketserver

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import socket

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import argparse

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import datetime

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import errno

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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from gi.repository import GLib

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import gobject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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import GnuPGInterface

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# Try to find the value of SO_BINDTODEVICE:

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try:

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# This is where SO_BINDTODEVICE is in Python 3.3 (or 3.4?) and

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# newer, and it is also the most natural place for it:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except AttributeError:

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try:

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# This is where SO_BINDTODEVICE was up to and including Python

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# 2.6, and also 3.2:

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from IN import SO_BINDTODEVICE

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except ImportError:

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# In Python 2.7 it seems to have been removed entirely.

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# Try running the C preprocessor:

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try:

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cc = subprocess.Popen(["cc", "--language=c", "-E",

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"/dev/stdin"],

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE)

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stdout = cc.communicate(

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"#include <sys/socket.h>\nSO_BINDTODEVICE\n")[0]

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SO_BINDTODEVICE = int(stdout.splitlines()[-1])

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except (OSError, ValueError, IndexError):

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# No value found

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.7.10"

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SO_BINDTODEVICE = None

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version = "1.4.1"

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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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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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try:

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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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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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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return interface_index

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def copy_function(func):

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

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger.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.gnupg = GnuPGInterface.GnuPG()

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

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet']

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# Only GPG version 1 has the --no-use-agent option.

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if self.gpg == "gpg" or self.gpg.endswith("/gpg"):

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self.gnupgargs.append("--no-use-agent")

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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self.gnupg.options.extra_args.extend(['--force-mdc',

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'--quiet'])

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def __enter__(self):

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return self

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def __exit__(self, exc_type, exc_value, traceback):

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def __exit__ (self, exc_type, exc_value, traceback):

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self._cleanup()

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return False

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def password_encode(self, password):

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# Passphrase can not be empty and can not contain newlines or

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# NUL bytes. So we prefix it and hex encode it.

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encoded = b"mandos" + binascii.hexlify(password)

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if len(encoded) > 2048:

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# GnuPG can't handle long passwords, so encode differently

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encoded = (b"mandos" + password.replace(b"\\", b"\\\\")

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.replace(b"\n", b"\\n")

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.replace(b"\0", b"\\x00"))

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return encoded

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return b"mandos" + binascii.hexlify(password)

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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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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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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self.gnupg.passphrase = self.password_encode(password)

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with open(os.devnull) as devnull:

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try:

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proc = self.gnupg.run(['--symmetric'],

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create_fhs=['stdin', 'stdout'],

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attach_fhs={'stderr': devnull})

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with contextlib.closing(proc.handles['stdin']) as f:

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f.write(data)

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with contextlib.closing(proc.handles['stdout']) as f:

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir = self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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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 = data)

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if proc.returncode != 0:

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raise PGPError(err)

193

self.gnupg.passphrase = self.password_encode(password)

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with open(os.devnull) as devnull:

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try:

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proc = self.gnupg.run(['--decrypt'],

197

create_fhs=['stdin', 'stdout'],

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attach_fhs={'stderr': devnull})

199

with contextlib.closing(proc.handles['stdin'] ) as f:

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f.write(data)

201

with contextlib.closing(proc.handles['stdout']) as f:

202

decrypted_plaintext = f.read()

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proc.wait()

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except IOError as e:

205

raise PGPError(e)

206

self.gnupg.passphrase = None

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return decrypted_plaintext

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# Pretend that we have an Avahi module

276

class Avahi(object):

277

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

278

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):

288

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

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

290

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

293

SERVER_INVALID = 0 # avahi-common/defs.h

294

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

297

SERVER_FAILURE = 4 # avahi-common/defs.h

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avahi = Avahi()

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300

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class AvahiError(Exception):

301

212

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

302

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self.value = value

303

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

304

**kwargs)

305

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

215

def __unicode__(self):

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return unicode(repr(self.value))

306

217

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class AvahiServiceError(AvahiError):

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219

pass

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class AvahiGroupError(AvahiError):

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pass

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223

320

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Used to optionally bind to the specified interface.

321

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name: string; Example: 'Mandos'

322

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type: string; Example: '_mandos._tcp'.

323

See <https://www.iana.org/assignments/service-names-port-numbers>

233

See <http://www.dns-sd.org/ServiceTypes.html>

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234

port: integer; what port to announce

325

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TXT: list of strings; TXT record for the service

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domain: string; Domain to publish on, default to .local if empty.

332

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server: D-Bus Server

333

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bus: dbus.SystemBus()

334

244

"""

335

336

def __init__(self,

337

interface = avahi.IF_UNSPEC,

338

name = None,

339

servicetype = None,

340

port = None,

341

TXT = None,

342

domain = "",

343

host = "",

344

max_renames = 32768,

345

protocol = avahi.PROTO_UNSPEC,

346

bus = None):

245

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

246

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

247

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

248

protocol = avahi.PROTO_UNSPEC, bus = None):

347

249

self.interface = interface

348

250

self.name = name

349

251

self.type = servicetype

358

260

self.server = None

359

261

self.bus = bus

360

262

self.entry_group_state_changed_match = None

361

362

def rename(self, remove=True):

263

def rename(self):

363

264

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

364

265

if self.rename_count >= self.max_renames:

365

266

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

366

267

" after %i retries, exiting.",

367

268

self.rename_count)

368

269

raise AvahiServiceError("Too many renames")

369

self.name = str(

370

self.server.GetAlternativeServiceName(self.name))

371

self.rename_count += 1

270

self.name = unicode(self.server

271

.GetAlternativeServiceName(self.name))

372

272

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

373

273

self.name)

374

if remove:

375

self.remove()

274

self.remove()

376

275

try:

377

276

self.add()

378

277

except dbus.exceptions.DBusException as error:

379

if (error.get_dbus_name()

380

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

381

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

382

return self.rename(remove=False)

383

else:

384

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

385

self.cleanup()

386

os._exit(1)

387

278

logger.critical("DBusException: %s", error)

279

self.cleanup()

280

os._exit(1)

281

self.rename_count += 1

388

282

def remove(self):

389

283

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

390

284

if self.entry_group_state_changed_match is not None:

392

286

self.entry_group_state_changed_match = None

393

287

if self.group is not None:

394

288

self.group.Reset()

395

396

289

def add(self):

397

290

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

398

291

self.remove()

415

308

dbus.UInt16(self.port),

416

309

avahi.string_array_to_txt_array(self.TXT))

417

310

self.group.Commit()

418

419

311

def entry_group_state_changed(self, state, error):

420

312

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

421

313

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

427

319

self.rename()

428

320

elif state == avahi.ENTRY_GROUP_FAILURE:

429

321

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

430

str(error))

431

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

432

322

unicode(error))

323

raise AvahiGroupError("State changed: %s"

324

% unicode(error))

433

325

def cleanup(self):

434

326

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

435

327

if self.group is not None:

440

332

pass

441

333

self.group = None

442

334

self.remove()

443

444

335

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

445

336

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

446

337

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

447

bad_states = {

448

avahi.SERVER_INVALID: "Zeroconf server invalid",

449

avahi.SERVER_REGISTERING: None,

450

avahi.SERVER_COLLISION: "Zeroconf server name collision",

451

avahi.SERVER_FAILURE: "Zeroconf server failure",

452

}

338

bad_states = { avahi.SERVER_INVALID:

339

"Zeroconf server invalid",

340

avahi.SERVER_REGISTERING: None,

341

avahi.SERVER_COLLISION:

342

"Zeroconf server name collision",

343

avahi.SERVER_FAILURE:

344

"Zeroconf server failure" }

453

345

if state in bad_states:

454

346

if bad_states[state] is not None:

455

347

if error is None:

458

350

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

459

351

self.cleanup()

460

352

elif state == avahi.SERVER_RUNNING:

461

try:

462

self.add()

463

except dbus.exceptions.DBusException as error:

464

if (error.get_dbus_name()

465

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

466

logger.info("Local Zeroconf service name"

467

" collision.")

468

return self.rename(remove=False)

469

else:

470

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

471

self.cleanup()

472

os._exit(1)

353

self.add()

473

354

else:

474

355

if error is None:

475

356

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

476

357

else:

477

358

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

478

479

359

def activate(self):

480

360

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

481

361

if self.server is None:

485

365

follow_name_owner_changes=True),

486

366

avahi.DBUS_INTERFACE_SERVER)

487

367

self.server.connect_to_signal("StateChanged",

488

self.server_state_changed)

368

self.server_state_changed)

489

369

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

490

370

491

492

371

class AvahiServiceToSyslog(AvahiService):

493

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

372

def rename(self):

494

373

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

495

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

496

syslogger.setFormatter(logging.Formatter(

497

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

498

.format(self.name)))

374

ret = AvahiService.rename(self)

375

syslogger.setFormatter(logging.Formatter

376

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

377

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

378

% self.name))

499

379

return ret

500

380

501

# Pretend that we have a GnuTLS module

502

class GnuTLS(object):

503

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

504

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

505

506

_library = ctypes.cdll.LoadLibrary(

507

ctypes.util.find_library("gnutls"))

508

_need_version = b"3.3.0"

509

def __init__(self):

510

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

511

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

512

# happens.

513

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

514

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

515

.format(self._need_version))

516

517

# Unless otherwise indicated, the constants and types below are

518

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

519

520

# Constants

521

E_SUCCESS = 0

522

E_INTERRUPTED = -52

523

E_AGAIN = -28

524

CRT_OPENPGP = 2

525

CLIENT = 2

526

SHUT_RDWR = 0

527

CRD_CERTIFICATE = 1

528

E_NO_CERTIFICATE_FOUND = -49

529

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

530

531

# Types

532

class session_int(ctypes.Structure):

533

_fields_ = []

534

session_t = ctypes.POINTER(session_int)

535

class certificate_credentials_st(ctypes.Structure):

536

_fields_ = []

537

certificate_credentials_t = ctypes.POINTER(

538

certificate_credentials_st)

539

certificate_type_t = ctypes.c_int

540

class datum_t(ctypes.Structure):

541

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

542

('size', ctypes.c_uint)]

543

class openpgp_crt_int(ctypes.Structure):

544

_fields_ = []

545

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

546

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

547

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

548

credentials_type_t = ctypes.c_int

549

transport_ptr_t = ctypes.c_void_p

550

close_request_t = ctypes.c_int

551

552

# Exceptions

553

class Error(Exception):

554

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

555

# exception might be raised from within GnuTLS.__init__,

556

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

557

# global variable has happened.

558

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

559

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

560

# code is passed, convert it to a string with

561

# gnutls.strerror()

562

self.code = code

563

if message is None and code is not None:

564

message = GnuTLS.strerror(code)

565

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

566

message, *args)

567

568

class CertificateSecurityError(Error):

569

pass

570

571

# Classes

572

class Credentials(object):

573

def __init__(self):

574

self._c_object = gnutls.certificate_credentials_t()

575

gnutls.certificate_allocate_credentials(

576

ctypes.byref(self._c_object))

577

self.type = gnutls.CRD_CERTIFICATE

578

579

def __del__(self):

580

gnutls.certificate_free_credentials(self._c_object)

581

582

class ClientSession(object):

583

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

584

self._c_object = gnutls.session_t()

585

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

586

gnutls.set_default_priority(self._c_object)

587

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

588

gnutls.handshake_set_private_extensions(self._c_object,

589

True)

590

self.socket = socket

591

if credentials is None:

592

credentials = gnutls.Credentials()

593

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

594

ctypes.cast(credentials._c_object,

595

ctypes.c_void_p))

596

self.credentials = credentials

597

598

def __del__(self):

599

gnutls.deinit(self._c_object)

600

601

def handshake(self):

602

return gnutls.handshake(self._c_object)

603

604

def send(self, data):

605

data = bytes(data)

606

data_len = len(data)

607

while data_len > 0:

608

data_len -= gnutls.record_send(self._c_object,

609

data[-data_len:],

610

data_len)

611

612

def bye(self):

613

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

614

615

# Error handling functions

616

def _error_code(result):

617

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

618

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

619

if result >= 0:

620

return result

621

if result == gnutls.E_NO_CERTIFICATE_FOUND:

622

raise gnutls.CertificateSecurityError(code = result)

623

raise gnutls.Error(code = result)

624

625

def _retry_on_error(result, func, arguments):

626

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

627

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

628

while result < 0:

629

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

630

return _error_code(result)

631

result = func(*arguments)

632

return result

633

634

# Unless otherwise indicated, the function declarations below are

635

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

636

637

# Functions

638

priority_set_direct = _library.gnutls_priority_set_direct

639

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

640

ctypes.POINTER(ctypes.c_char_p)]

641

priority_set_direct.restype = _error_code

642

643

init = _library.gnutls_init

644

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

645

init.restype = _error_code

646

647

set_default_priority = _library.gnutls_set_default_priority

648

set_default_priority.argtypes = [session_t]

649

set_default_priority.restype = _error_code

650

651

record_send = _library.gnutls_record_send

652

record_send.argtypes = [session_t, ctypes.c_void_p,

653

ctypes.c_size_t]

654

record_send.restype = ctypes.c_ssize_t

655

record_send.errcheck = _retry_on_error

656

657

certificate_allocate_credentials = (

658

_library.gnutls_certificate_allocate_credentials)

659

certificate_allocate_credentials.argtypes = [

660

ctypes.POINTER(certificate_credentials_t)]

661

certificate_allocate_credentials.restype = _error_code

662

663

certificate_free_credentials = (

664

_library.gnutls_certificate_free_credentials)

665

certificate_free_credentials.argtypes = [certificate_credentials_t]

666

certificate_free_credentials.restype = None

667

668

handshake_set_private_extensions = (

669

_library.gnutls_handshake_set_private_extensions)

670

handshake_set_private_extensions.argtypes = [session_t,

671

ctypes.c_int]

672

handshake_set_private_extensions.restype = None

673

674

credentials_set = _library.gnutls_credentials_set

675

credentials_set.argtypes = [session_t, credentials_type_t,

676

ctypes.c_void_p]

677

credentials_set.restype = _error_code

678

679

strerror = _library.gnutls_strerror

680

strerror.argtypes = [ctypes.c_int]

681

strerror.restype = ctypes.c_char_p

682

683

certificate_type_get = _library.gnutls_certificate_type_get

684

certificate_type_get.argtypes = [session_t]

685

certificate_type_get.restype = _error_code

686

687

certificate_get_peers = _library.gnutls_certificate_get_peers

688

certificate_get_peers.argtypes = [session_t,

689

ctypes.POINTER(ctypes.c_uint)]

690

certificate_get_peers.restype = ctypes.POINTER(datum_t)

691

692

global_set_log_level = _library.gnutls_global_set_log_level

693

global_set_log_level.argtypes = [ctypes.c_int]

694

global_set_log_level.restype = None

695

696

global_set_log_function = _library.gnutls_global_set_log_function

697

global_set_log_function.argtypes = [log_func]

698

global_set_log_function.restype = None

699

700

deinit = _library.gnutls_deinit

701

deinit.argtypes = [session_t]

702

deinit.restype = None

703

704

handshake = _library.gnutls_handshake

705

handshake.argtypes = [session_t]

706

handshake.restype = _error_code

707

handshake.errcheck = _retry_on_error

708

709

transport_set_ptr = _library.gnutls_transport_set_ptr

710

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

711

transport_set_ptr.restype = None

712

713

bye = _library.gnutls_bye

714

bye.argtypes = [session_t, close_request_t]

715

bye.restype = _error_code

716

bye.errcheck = _retry_on_error

717

718

check_version = _library.gnutls_check_version

719

check_version.argtypes = [ctypes.c_char_p]

720

check_version.restype = ctypes.c_char_p

721

722

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

723

724

openpgp_crt_init = _library.gnutls_openpgp_crt_init

725

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

726

openpgp_crt_init.restype = _error_code

727

728

openpgp_crt_import = _library.gnutls_openpgp_crt_import

729

openpgp_crt_import.argtypes = [openpgp_crt_t,

730

ctypes.POINTER(datum_t),

731

openpgp_crt_fmt_t]

732

openpgp_crt_import.restype = _error_code

733

734

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

735

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

736

ctypes.POINTER(ctypes.c_uint)]

737

openpgp_crt_verify_self.restype = _error_code

738

739

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

740

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

741

openpgp_crt_deinit.restype = None

742

743

openpgp_crt_get_fingerprint = (

744

_library.gnutls_openpgp_crt_get_fingerprint)

745

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

746

ctypes.c_void_p,

747

ctypes.POINTER(

748

ctypes.c_size_t)]

749

openpgp_crt_get_fingerprint.restype = _error_code

750

751

# Remove non-public functions

752

del _error_code, _retry_on_error

753

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

754

gnutls = GnuTLS()

755

756

def call_pipe(connection, # : multiprocessing.Connection

757

func, *args, **kwargs):

758

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

759

760

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

761

return value on the provided multiprocessing.Connection.

762

"""

763

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

764

connection.close()

765

381

def timedelta_to_milliseconds(td):

382

"Convert a datetime.timedelta() to milliseconds"

383

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

384

+ (td.seconds * 1000)

385

+ (td.microseconds // 1000))

386

766

387

class Client(object):

767

388

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

768

389

773

394

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

774

395

to see if the client lives.

775

396

'None' if no process is running.

776

checker_callback_tag: a GLib event source tag, or None

397

checker_callback_tag: a gobject event source tag, or None

777

398

checker_command: string; External command which is run to check

778

399

if client lives. %() expansions are done at

779

400

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

780

401

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

781

checker_initiator_tag: a GLib event source tag, or None

402

checker_initiator_tag: a gobject event source tag, or None

782

403

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

783

404

client_structure: Object describing what attributes a client has

784

405

and is used for storing the client at exit

785

406

current_checker_command: string; current running checker_command

786

disable_initiator_tag: a GLib event source tag, or None

407

disable_initiator_tag: a gobject event source tag, or None

787

408

enabled: bool()

788

409

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

789

410

uniquely identify the client

793

414

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

794

415

last_checker_status: integer between 0 and 255 reflecting exit

795

416

status of last checker. -1 reflects crashed

796

checker, -2 means no checker completed yet.

797

last_checker_signal: The signal which killed the last checker, if

798

last_checker_status is -1

417

checker, or None.

799

418

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

800

419

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

801

420

D-Bus identifiers

802

421

secret: bytestring; sent verbatim (over TLS) to client

803

422

timeout: datetime.timedelta(); How long from last_checked_ok

804

423

until this client is disabled

805

extended_timeout: extra long timeout when secret has been sent

424

extended_timeout: extra long timeout when password has been sent

806

425

runtime_expansions: Allowed attributes for runtime expansion.

807

426

expires: datetime.datetime(); time (UTC) when a client will be

808

427

disabled, or None

809

server_settings: The server_settings dict from main()

810

428

"""

811

429

812

430

runtime_expansions = ("approval_delay", "approval_duration",

813

"created", "enabled", "expires",

814

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

815

"last_approval_request", "last_checked_ok",

431

"created", "enabled", "fingerprint",

432

"host", "interval", "last_checked_ok",

816

433

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

817

client_defaults = {

818

"timeout": "PT5M",

819

"extended_timeout": "PT15M",

820

"interval": "PT2M",

821

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

822

"host": "",

823

"approval_delay": "PT0S",

824

"approval_duration": "PT1S",

825

"approved_by_default": "True",

826

"enabled": "True",

827

}

828

434

client_defaults = { "timeout": "5m",

435

"extended_timeout": "15m",

436

"interval": "2m",

437

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

438

"host": "",

439

"approval_delay": "0s",

440

"approval_duration": "1s",

441

"approved_by_default": "True",

442

"enabled": "True",

443

}

444

445

def timeout_milliseconds(self):

446

"Return the 'timeout' attribute in milliseconds"

447

return timedelta_to_milliseconds(self.timeout)

448

449

def extended_timeout_milliseconds(self):

450

"Return the 'extended_timeout' attribute in milliseconds"

451

return timedelta_to_milliseconds(self.extended_timeout)

452

453

def interval_milliseconds(self):

454

"Return the 'interval' attribute in milliseconds"

455

return timedelta_to_milliseconds(self.interval)

456

457

def approval_delay_milliseconds(self):

458

return timedelta_to_milliseconds(self.approval_delay)

459

829

460

@staticmethod

830

461

def config_parser(config):

831

"""Construct a new dict of client settings of this form:

462

""" Construct a new dict of client settings of this form:

832

463

{ client_name: {setting_name: value, ...}, ...}

833

with exceptions for any special settings as defined above.

834

NOTE: Must be a pure function. Must return the same result

835

value given the same arguments.

836

"""

464

with exceptions for any special settings as defined above"""

837

465

settings = {}

838

466

for client_name in config.sections():

839

467

section = dict(config.items(client_name))

843

471

# Reformat values from string types to Python types

844

472

client["approved_by_default"] = config.getboolean(

845

473

client_name, "approved_by_default")

846

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

847

"enabled")

474

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

848

475

849

# Uppercase and remove spaces from fingerprint for later

850

# comparison purposes with return value from the

851

# fingerprint() function

852

476

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

853

477

.replace(" ", ""))

854

478

if "secret" in section:

855

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

856

.encode("utf-8"),

857

"base64")

479

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

858

480

elif "secfile" in section:

859

481

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

860

482

(section["secfile"])),

861

483

"rb") as secfile:

862

484

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

863

485

else:

864

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

865

.format(section))

486

raise TypeError("No secret or secfile for section %s"

487

% section)

866

488

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

867

489

client["extended_timeout"] = string_to_delta(

868

490

section["extended_timeout"])

874

496

client["checker_command"] = section["checker"]

875

497

client["last_approval_request"] = None

876

498

client["last_checked_ok"] = None

877

client["last_checker_status"] = -2

878

499

client["last_checker_status"] = None

500

if client["enabled"]:

501

client["last_enabled"] = datetime.datetime.utcnow()

502

client["expires"] = (datetime.datetime.utcnow()

503

+ client["timeout"])

504

else:

505

client["last_enabled"] = None

506

client["expires"] = None

507

879

508

return settings

880

881

def __init__(self, settings, name = None, server_settings=None):

509

510

511

def __init__(self, settings, name = None):

512

"""Note: the 'checker' key in 'config' sets the

513

'checker_command' attribute and *not* the 'checker'

514

attribute."""

882

515

self.name = name

883

if server_settings is None:

884

server_settings = {}

885

self.server_settings = server_settings

886

516

# adding all client settings

887

for setting, value in settings.items():

517

for setting, value in settings.iteritems():

888

518

setattr(self, setting, value)

889

519

890

if self.enabled:

891

if not hasattr(self, "last_enabled"):

892

self.last_enabled = datetime.datetime.utcnow()

893

if not hasattr(self, "expires"):

894

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

895

+ self.timeout)

896

else:

897

self.last_enabled = None

898

self.expires = None

899

900

520

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

521

# Uppercase and remove spaces from fingerprint for later

522

# comparison purposes with return value from the fingerprint()

523

# function

901

524

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

902

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

903

datetime.datetime.utcnow())

904

525

self.created = settings.get("created", datetime.datetime.utcnow())

526

905

527

# attributes specific for this server instance

906

528

self.checker = None

907

529

self.checker_initiator_tag = None

910

532

self.current_checker_command = None

911

533

self.approved = None

912

534

self.approvals_pending = 0

913

self.changedstate = multiprocessing_manager.Condition(

914

multiprocessing_manager.Lock())

915

self.client_structure = [attr

916

for attr in self.__dict__.keys()

535

self.changedstate = (multiprocessing_manager

536

.Condition(multiprocessing_manager

537

.Lock()))

538

self.client_structure = [attr for attr in

539

self.__dict__.iterkeys()

917

540

if not attr.startswith("_")]

918

541

self.client_structure.append("client_structure")

919

542

920

for name, t in inspect.getmembers(

921

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

543

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

544

lambda obj:

545

isinstance(obj,

546

property)):

922

547

if not name.startswith("_"):

923

548

self.client_structure.append(name)

924

549

932

557

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

933

558

# Already enabled

934

559

return

560

self.send_changedstate()

935

561

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

936

562

self.enabled = True

937

563

self.last_enabled = datetime.datetime.utcnow()

938

564

self.init_checker()

939

self.send_changedstate()

940

565

941

566

def disable(self, quiet=True):

942

567

"""Disable this client."""

943

568

if not getattr(self, "enabled", False):

944

569

return False

945

570

if not quiet:

571

self.send_changedstate()

572

if not quiet:

946

573

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

947

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

948

GLib.source_remove(self.disable_initiator_tag)

574

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

575

gobject.source_remove(self.disable_initiator_tag)

949

576

self.disable_initiator_tag = None

950

577

self.expires = None

951

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

952

GLib.source_remove(self.checker_initiator_tag)

578

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

579

gobject.source_remove(self.checker_initiator_tag)

953

580

self.checker_initiator_tag = None

954

581

self.stop_checker()

955

582

self.enabled = False

956

if not quiet:

957

self.send_changedstate()

958

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

583

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

959

584

return False

960

585

961

586

def __del__(self):

964

589

def init_checker(self):

965

590

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

966

591

# and every interval from then on.

967

if self.checker_initiator_tag is not None:

968

GLib.source_remove(self.checker_initiator_tag)

969

self.checker_initiator_tag = GLib.timeout_add(

970

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

971

self.start_checker)

592

self.checker_initiator_tag = (gobject.timeout_add

593

(self.interval_milliseconds(),

594

self.start_checker))

972

595

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

973

if self.disable_initiator_tag is not None:

974

GLib.source_remove(self.disable_initiator_tag)

975

self.disable_initiator_tag = GLib.timeout_add(

976

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

596

self.disable_initiator_tag = (gobject.timeout_add

597

(self.timeout_milliseconds(),

598

self.disable))

977

599

# Also start a new checker *right now*.

978

600

self.start_checker()

979

601

980

def checker_callback(self, source, condition, connection,

981

command):

602

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

982

603

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

983

604

self.checker_callback_tag = None

984

605

self.checker = None

985

# Read return code from connection (see call_pipe)

986

returncode = connection.recv()

987

connection.close()

988

989

if returncode >= 0:

990

self.last_checker_status = returncode

991

self.last_checker_signal = None

606

if os.WIFEXITED(condition):

607

self.last_checker_status = os.WEXITSTATUS(condition)

992

608

if self.last_checker_status == 0:

993

609

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

994

610

vars(self))

995

611

self.checked_ok()

996

612

else:

997

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

613

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

614

vars(self))

998

615

else:

999

616

self.last_checker_status = -1

1000

self.last_checker_signal = -returncode

1001

617

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

1002

618

vars(self))

1003

return False

1004

1005

def checked_ok(self):

1006

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

1007

self.last_checked_ok = datetime.datetime.utcnow()

1008

self.last_checker_status = 0

1009

self.last_checker_signal = None

1010

self.bump_timeout()

1011

1012

def bump_timeout(self, timeout=None):

1013

"""Bump up the timeout for this client."""

619

620

def checked_ok(self, timeout=None):

621

"""Bump up the timeout for this client.

622

623

This should only be called when the client has been seen,

624

alive and well.

625

"""

1014

626

if timeout is None:

1015

627

timeout = self.timeout

628

self.last_checked_ok = datetime.datetime.utcnow()

1016

629

if self.disable_initiator_tag is not None:

1017

GLib.source_remove(self.disable_initiator_tag)

1018

self.disable_initiator_tag = None

630

gobject.source_remove(self.disable_initiator_tag)

1019

631

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

1020

self.disable_initiator_tag = GLib.timeout_add(

1021

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

632

self.disable_initiator_tag = (gobject.timeout_add

633

(timedelta_to_milliseconds

634

(timeout), self.disable))

1022

635

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

1023

636

1024

637

def need_approval(self):

1030

643

If a checker already exists, leave it running and do

1031

644

nothing."""

1032

645

# The reason for not killing a running checker is that if we

1033

# did that, and if a checker (for some reason) started running

1034

# slowly and taking more than 'interval' time, then the client

1035

# would inevitably timeout, since no checker would get a

1036

# chance to run to completion. If we instead leave running

646

# did that, then if a checker (for some reason) started

647

# running slowly and taking more than 'interval' time, the

648

# client would inevitably timeout, since no checker would get

649

# a chance to run to completion. If we instead leave running

1037

650

# checkers alone, the checker would have to take more time

1038

651

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

1039

652

# should be.

1040

653

1041

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

1042

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

1043

self.checker.join()

1044

self.checker = None

654

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

655

try:

656

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

657

except (AttributeError, OSError) as error:

658

if (isinstance(error, OSError)

659

and error.errno != errno.ECHILD):

660

raise error

661

else:

662

if pid:

663

logger.warning("Checker was a zombie")

664

gobject.source_remove(self.checker_callback_tag)

665

self.checker_callback(pid, status,

666

self.current_checker_command)

1045

667

# Start a new checker if needed

1046

668

if self.checker is None:

1047

# Escape attributes for the shell

1048

escaped_attrs = {

1049

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

1050

for attr in self.runtime_expansions }

1051

669

try:

1052

command = self.checker_command % escaped_attrs

1053

except TypeError as error:

1054

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

1055

self.checker_command,

1056

exc_info=error)

1057

return True # Try again later

670

# In case checker_command has exactly one % operator

671

command = self.checker_command % self.host

672

except TypeError:

673

# Escape attributes for the shell

674

escaped_attrs = dict(

675

(attr,

676

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

677

errors=

678

'replace')))

679

for attr in

680

self.runtime_expansions)

681

682

try:

683

command = self.checker_command % escaped_attrs

684

except TypeError as error:

685

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

686

' %s', self.checker_command, error)

687

return True # Try again later

1058

688

self.current_checker_command = command

1059

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

1060

self.name)

1061

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

1062

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

1063

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

1064

# always replaced by /dev/null.)

1065

# The exception is when not debugging but nevertheless

1066

# running in the foreground; use the previously

1067

# created wnull.

1068

popen_args = { "close_fds": True,

1069

"shell": True,

1070

"cwd": "/" }

1071

if (not self.server_settings["debug"]

1072

and self.server_settings["foreground"]):

1073

popen_args.update({"stdout": wnull,

1074

"stderr": wnull })

1075

pipe = multiprocessing.Pipe(duplex = False)

1076

self.checker = multiprocessing.Process(

1077

target = call_pipe,

1078

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

1079

kwargs = popen_args)

1080

self.checker.start()

1081

self.checker_callback_tag = GLib.io_add_watch(

1082

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

1083

self.checker_callback, pipe[0], command)

1084

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

689

try:

690

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

691

command, self.name)

692

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

693

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

694

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

695

# always replaced by /dev/null.)

696

self.checker = subprocess.Popen(command,

697

close_fds=True,

698

shell=True, cwd="/")

699

self.checker_callback_tag = (gobject.child_watch_add

700

(self.checker.pid,

701

self.checker_callback,

702

data=command))

703

# The checker may have completed before the gobject

704

# watch was added. Check for this.

705

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

706

if pid:

707

gobject.source_remove(self.checker_callback_tag)

708

self.checker_callback(pid, status, command)

709

except OSError as error:

710

logger.error("Failed to start subprocess: %s",

711

error)

712

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

1085

713

return True

1086

714

1087

715

def stop_checker(self):

1088

716

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

1089

717

if self.checker_callback_tag:

1090

GLib.source_remove(self.checker_callback_tag)

718

gobject.source_remove(self.checker_callback_tag)

1091

719

self.checker_callback_tag = None

1092

720

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

1093

721

return

1094

722

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

1095

self.checker.terminate()

723

try:

724

os.kill(self.checker.pid, signal.SIGTERM)

725

#time.sleep(0.5)

726

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

727

# os.kill(self.checker.pid, signal.SIGKILL)

728

except OSError as error:

729

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

730

raise

1096

731

self.checker = None

1097

732

1098

733

1099

def dbus_service_property(dbus_interface,

1100

signature="v",

1101

access="readwrite",

1102

byte_arrays=False):

734

def dbus_service_property(dbus_interface, signature="v",

735

access="readwrite", byte_arrays=False):

1103

736

"""Decorators for marking methods of a DBusObjectWithProperties to

1104

737

become properties on the D-Bus.

1105

738

1114

747

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

1115

748

if byte_arrays and signature != "ay":

1116

749

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

1117

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

1118

750

" signature %r" % signature)

1119

751

def decorator(func):

1120

752

func._dbus_is_property = True

1121

753

func._dbus_interface = dbus_interface

1126

758

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

1127

759

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1128

760

return func

1129

1130

return decorator

1131

1132

1133

def dbus_interface_annotations(dbus_interface):

1134

"""Decorator for marking functions returning interface annotations

1135

1136

Usage:

1137

1138

@dbus_interface_annotations("org.example.Interface")

1139

def _foo(self): # Function name does not matter

1140

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

1141

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

1142

"false"}

1143

"""

1144

1145

def decorator(func):

1146

func._dbus_is_interface = True

1147

func._dbus_interface = dbus_interface

1148

func._dbus_name = dbus_interface

1149

return func

1150

1151

return decorator

1152

1153

1154

def dbus_annotations(annotations):

1155

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

1156

Usage:

1157

1158

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

1159

"org.freedesktop.DBus.Property."

1160

"EmitsChangedSignal": "false"})

1161

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

1162

access="r")

1163

def Property_dbus_property(self):

1164

return dbus.Boolean(False)

1165

1166

See also the DBusObjectWithAnnotations class.

1167

"""

1168

1169

def decorator(func):

1170

func._dbus_annotations = annotations

1171

return func

1172

1173

761

return decorator

1174

762

1175

763

1176

764

class DBusPropertyException(dbus.exceptions.DBusException):

1177

765

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

1178

766

"""

1179

pass

767

def __unicode__(self):

768

return unicode(str(self))

1180

769

1181

770

1182

771

class DBusPropertyAccessException(DBusPropertyException):

1191

780

pass

1192

781

1193

782

1194

class DBusObjectWithAnnotations(dbus.service.Object):

1195

"""A D-Bus object with annotations.

1196

1197

Classes inheriting from this can use the dbus_annotations

1198

decorator to add annotations to methods or signals.

1199

"""

1200

1201

@staticmethod

1202

def _is_dbus_thing(thing):

1203

"""Returns a function testing if an attribute is a D-Bus thing

1204

1205

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

1206

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

1207

"""

1208

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

1209

False)

1210

1211

def _get_all_dbus_things(self, thing):

1212

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

1213

"""

1214

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

1215

athing.__get__(self))

1216

for cls in self.__class__.__mro__

1217

for name, athing in

1218

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

1219

1220

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1221

out_signature = "s",

1222

path_keyword = 'object_path',

1223

connection_keyword = 'connection')

1224

def Introspect(self, object_path, connection):

1225

"""Overloading of standard D-Bus method.

1226

1227

Inserts annotation tags on methods and signals.

1228

"""

1229

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

1230

connection)

1231

try:

1232

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

1233

1234

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

1235

# Add annotation tags

1236

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

1237

for tag in if_tag.getElementsByTagName(typ):

1238

annots = dict()

1239

for name, prop in (self.

1240

_get_all_dbus_things(typ)):

1241

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

1242

and prop._dbus_interface

1243

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

1244

annots.update(getattr(

1245

prop, "_dbus_annotations", {}))

1246

for name, value in annots.items():

1247

ann_tag = document.createElement(

1248

"annotation")

1249

ann_tag.setAttribute("name", name)

1250

ann_tag.setAttribute("value", value)

1251

tag.appendChild(ann_tag)

1252

# Add interface annotation tags

1253

for annotation, value in dict(

1254

itertools.chain.from_iterable(

1255

annotations().items()

1256

for name, annotations

1257

in self._get_all_dbus_things("interface")

1258

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

1259

)).items():

1260

ann_tag = document.createElement("annotation")

1261

ann_tag.setAttribute("name", annotation)

1262

ann_tag.setAttribute("value", value)

1263

if_tag.appendChild(ann_tag)

1264

# Fix argument name for the Introspect method itself

1265

if (if_tag.getAttribute("name")

1266

== dbus.INTROSPECTABLE_IFACE):

1267

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

1268

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

1269

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

1270

if (arg.getAttribute("direction")

1271

== "out"):

1272

arg.setAttribute("name",

1273

"xml_data")

1274

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

1275

document.unlink()

1276

except (AttributeError, xml.dom.DOMException,

1277

xml.parsers.expat.ExpatError) as error:

1278

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

1279

exc_info=error)

1280

return xmlstring

1281

1282

1283

class DBusObjectWithProperties(DBusObjectWithAnnotations):

783

class DBusObjectWithProperties(dbus.service.Object):

1284

784

"""A D-Bus object with properties.

1285

785

1286

786

Classes inheriting from this can use the dbus_service_property

1288

788

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

1289

789

"""

1290

790

791

@staticmethod

792

def _is_dbus_property(obj):

793

return getattr(obj, "_dbus_is_property", False)

794

795

def _get_all_dbus_properties(self):

796

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

797

"""

798

return ((prop.__get__(self)._dbus_name, prop.__get__(self))

799

for cls in self.__class__.__mro__

800

for name, prop in

801

inspect.getmembers(cls, self._is_dbus_property))

802

1291

803

def _get_dbus_property(self, interface_name, property_name):

1292

804

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

1293

805

property with the specified name and interface.

1294

806

"""

1295

for cls in self.__class__.__mro__:

1296

for name, value in inspect.getmembers(

1297

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

807

for cls in self.__class__.__mro__:

808

for name, value in (inspect.getmembers

809

(cls, self._is_dbus_property)):

1298

810

if (value._dbus_name == property_name

1299

811

and value._dbus_interface == interface_name):

1300

812

return value.__get__(self)

1301

813

1302

814

# No such property

1303

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

1304

self.dbus_object_path, interface_name, property_name))

1305

1306

@classmethod

1307

def _get_all_interface_names(cls):

1308

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

1309

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

1310

"_dbus_interface", None)

1311

for x in (inspect.getmro(cls))

1312

for attr in dir(x))

1313

if name is not None)

1314

1315

@dbus.service.method(dbus.PROPERTIES_IFACE,

1316

in_signature="ss",

815

raise DBusPropertyNotFound(self.dbus_object_path + ":"

816

+ interface_name + "."

817

+ property_name)

818

819

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

1317

820

out_signature="v")

1318

821

def Get(self, interface_name, property_name):

1319

822

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

1337

840

# The byte_arrays option is not supported yet on

1338

841

# signatures other than "ay".

1339

842

if prop._dbus_signature != "ay":

1340

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

1341

"'ay' signature {!r}"

1342

.format(prop._dbus_signature))

1343

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

1344

for byte in value))

843

raise ValueError

844

value = dbus.ByteArray(''.join(unichr(byte)

845

for byte in value))

1345

846

prop(value)

1346

847

1347

@dbus.service.method(dbus.PROPERTIES_IFACE,

1348

in_signature="s",

848

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

1349

849

out_signature="a{sv}")

1350

850

def GetAll(self, interface_name):

1351

851

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

1354

854

Note: Will not include properties with access="write".

1355

855

"""

1356

856

properties = {}

1357

for name, prop in self._get_all_dbus_things("property"):

857

for name, prop in self._get_all_dbus_properties():

1358

858

if (interface_name

1359

859

and interface_name != prop._dbus_interface):

1360

860

# Interface non-empty but did not match

1366

866

if not hasattr(value, "variant_level"):

1367

867

properties[name] = value

1368

868

continue

1369

properties[name] = type(value)(

1370

value, variant_level = value.variant_level + 1)

869

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

870

value.variant_level+1)

1371

871

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

1372

872

1373

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

1374

def PropertiesChanged(self, interface_name, changed_properties,

1375

invalidated_properties):

1376

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

1377

standard.

1378

"""

1379

pass

1380

1381

873

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1382

874

out_signature="s",

1383

875

path_keyword='object_path',

1384

876

connection_keyword='connection')

1385

877

def Introspect(self, object_path, connection):

1386

"""Overloading of standard D-Bus method.

1387

1388

Inserts property tags and interface annotation tags.

878

"""Standard D-Bus method, overloaded to insert property tags.

1389

879

"""

1390

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1391

object_path,

1392

connection)

880

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

881

connection)

1393

882

try:

1394

883

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

1395

1396

884

def make_tag(document, name, prop):

1397

885

e = document.createElement("property")

1398

886

e.setAttribute("name", name)

1399

887

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

1400

888

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

1401

889

return e

1402

1403

890

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

1404

# Add property tags

1405

891

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

1406

892

for name, prop

1407

in self._get_all_dbus_things("property")

893

in self._get_all_dbus_properties()

1408

894

if prop._dbus_interface

1409

895

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

1410

896

if_tag.appendChild(tag)

1411

# Add annotation tags for properties

1412

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

1413

annots = dict()

1414

for name, prop in self._get_all_dbus_things(

1415

"property"):

1416

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

1417

and prop._dbus_interface

1418

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

1419

annots.update(getattr(

1420

prop, "_dbus_annotations", {}))

1421

for name, value in annots.items():

1422

ann_tag = document.createElement(

1423

"annotation")

1424

ann_tag.setAttribute("name", name)

1425

ann_tag.setAttribute("value", value)

1426

tag.appendChild(ann_tag)

1427

897

# Add the names to the return values for the

1428

898

# "org.freedesktop.DBus.Properties" methods

1429

899

if (if_tag.getAttribute("name")

1444

914

except (AttributeError, xml.dom.DOMException,

1445

915

xml.parsers.expat.ExpatError) as error:

1446

916

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

1447

exc_info=error)

1448

return xmlstring

1449

1450

try:

1451

dbus.OBJECT_MANAGER_IFACE

1452

except AttributeError:

1453

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

1454

1455

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1456

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

1457

1458

Classes inheriting from this exposes the standard

1459

GetManagedObjects call and the InterfacesAdded and

1460

InterfacesRemoved signals on the standard

1461

"org.freedesktop.DBus.ObjectManager" interface.

1462

1463

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

1464

manually.

1465

"""

1466

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1467

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

1468

def GetManagedObjects(self):

1469

"""This function must be overridden"""

1470

raise NotImplementedError()

1471

1472

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1473

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

1474

def InterfacesAdded(self, object_path, interfaces_and_properties):

1475

pass

1476

1477

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

1478

def InterfacesRemoved(self, object_path, interfaces):

1479

pass

1480

1481

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1482

out_signature = "s",

1483

path_keyword = 'object_path',

1484

connection_keyword = 'connection')

1485

def Introspect(self, object_path, connection):

1486

"""Overloading of standard D-Bus method.

1487

1488

Override return argument name of GetManagedObjects to be

1489

"objpath_interfaces_and_properties"

1490

"""

1491

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1492

object_path,

1493

connection)

1494

try:

1495

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

1496

1497

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

1498

# Fix argument name for the GetManagedObjects method

1499

if (if_tag.getAttribute("name")

1500

== dbus.OBJECT_MANAGER_IFACE):

1501

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

1502

if (cn.getAttribute("name")

1503

== "GetManagedObjects"):

1504

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

1505

if (arg.getAttribute("direction")

1506

== "out"):

1507

arg.setAttribute(

1508

"name",

1509

"objpath_interfaces"

1510

"_and_properties")

1511

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

1512

document.unlink()

1513

except (AttributeError, xml.dom.DOMException,

1514

xml.parsers.expat.ExpatError) as error:

1515

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

1516

exc_info = error)

1517

return xmlstring

1518

1519

def datetime_to_dbus(dt, variant_level=0):

917

error)

918

return xmlstring

919

920

921

def datetime_to_dbus (dt, variant_level=0):

1520

922

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

1521

923

if dt is None:

1522

924

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

1523

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

1524

1525

1526

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1527

"""A class decorator; applied to a subclass of

1528

dbus.service.Object, it will add alternate D-Bus attributes with

1529

interface names according to the "alt_interface_names" mapping.

1530

Usage:

1531

1532

@alternate_dbus_interfaces({"org.example.Interface":

1533

"net.example.AlternateInterface"})

1534

class SampleDBusObject(dbus.service.Object):

1535

@dbus.service.method("org.example.Interface")

1536

def SampleDBusMethod():

1537

pass

1538

1539

The above "SampleDBusMethod" on "SampleDBusObject" will be

1540

reachable via two interfaces: "org.example.Interface" and

1541

"net.example.AlternateInterface", the latter of which will have

1542

its D-Bus annotation "org.freedesktop.DBus.Deprecated" set to

1543

"true", unless "deprecate" is passed with a False value.

1544

1545

This works for methods and signals, and also for D-Bus properties

1546

(from DBusObjectWithProperties) and interfaces (from the

1547

dbus_interface_annotations decorator).

925

return dbus.String(dt.isoformat(),

926

variant_level=variant_level)

927

928

929

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

930

.__metaclass__):

931

"""Applied to an empty subclass of a D-Bus object, this metaclass

932

will add additional D-Bus attributes matching a certain pattern.

1548

933

"""

1549

1550

def wrapper(cls):

1551

for orig_interface_name, alt_interface_name in (

1552

alt_interface_names.items()):

1553

attr = {}

1554

interface_names = set()

1555

# Go though all attributes of the class

1556

for attrname, attribute in inspect.getmembers(cls):

934

def __new__(mcs, name, bases, attr):

935

# Go through all the base classes which could have D-Bus

936

# methods, signals, or properties in them

937

for base in (b for b in bases

938

if issubclass(b, dbus.service.Object)):

939

# Go though all attributes of the base class

940

for attrname, attribute in inspect.getmembers(base):

1557

941

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

1558

942

# with the wrong interface name

1559

943

if (not hasattr(attribute, "_dbus_interface")

1560

or not attribute._dbus_interface.startswith(

1561

orig_interface_name)):

944

or not attribute._dbus_interface

945

.startswith("se.recompile.Mandos")):

1562

946

continue

1563

947

# Create an alternate D-Bus interface name based on

1564

948

# the current name

1565

alt_interface = attribute._dbus_interface.replace(

1566

orig_interface_name, alt_interface_name)

1567

interface_names.add(alt_interface)

949

alt_interface = (attribute._dbus_interface

950

.replace("se.recompile.Mandos",

951

"se.bsnet.fukt.Mandos"))

1568

952

# Is this a D-Bus signal?

1569

953

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

1570

# Extract the original non-method undecorated

1571

# function by black magic

1572

if sys.version_info.major == 2:

1573

nonmethod_func = (dict(

954

# Extract the original non-method function by

955

# black magic

956

nonmethod_func = (dict(

1574

957

zip(attribute.func_code.co_freevars,

1575

attribute.__closure__))

1576

["func"].cell_contents)

1577

else:

1578

nonmethod_func = (dict(

1579

zip(attribute.__code__.co_freevars,

1580

attribute.__closure__))

1581

["func"].cell_contents)

958

attribute.__closure__))["func"]

959

.cell_contents)

1582

960

# Create a new, but exactly alike, function

1583

961

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

1584

962

# with the alternate D-Bus interface name

1585

new_function = copy_function(nonmethod_func)

1586

new_function = (dbus.service.signal(

1587

alt_interface,

1588

attribute._dbus_signature)(new_function))

1589

# Copy annotations, if any

1590

try:

1591

new_function._dbus_annotations = dict(

1592

attribute._dbus_annotations)

1593

except AttributeError:

1594

pass

963

new_function = (dbus.service.signal

964

(alt_interface,

965

attribute._dbus_signature)

966

(types.FunctionType(

967

nonmethod_func.func_code,

968

nonmethod_func.func_globals,

969

nonmethod_func.func_name,

970

nonmethod_func.func_defaults,

971

nonmethod_func.func_closure)))

1595

972

# Define a creator of a function to call both the

1596

# original and alternate functions, so both the

1597

# original and alternate signals gets sent when

1598

# the function is called

973

# old and new functions, so both the old and new

974

# signals gets sent when the function is called

1599

975

def fixscope(func1, func2):

1600

976

"""This function is a scope container to pass

1601

977

func1 and func2 to the "call_both" function

1602

978

outside of its arguments"""

1603

1604

@functools.wraps(func2)

1605

979

def call_both(*args, **kwargs):

1606

980

"""This function will emit two D-Bus

1607

981

signals by calling func1 and func2"""

1608

982

func1(*args, **kwargs)

1609

983

func2(*args, **kwargs)

1610

# Make wrapper function look like a D-Bus signal

1611

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

1612

if name.startswith("_dbus_"):

1613

setattr(call_both, name, attr)

1614

1615

984

return call_both

1616

985

# Create the "call_both" function and add it to

1617

986

# the class

1618

attr[attrname] = fixscope(attribute, new_function)

987

attr[attrname] = fixscope(attribute,

988

new_function)

1619

989

# Is this a D-Bus method?

1620

990

elif getattr(attribute, "_dbus_is_method", False):

1621

991

# Create a new, but exactly alike, function

1622

992

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

1623

993

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

1624

994

# to the class.

1625

attr[attrname] = (

1626

dbus.service.method(

1627

alt_interface,

1628

attribute._dbus_in_signature,

1629

attribute._dbus_out_signature)

1630

(copy_function(attribute)))

1631

# Copy annotations, if any

1632

try:

1633

attr[attrname]._dbus_annotations = dict(

1634

attribute._dbus_annotations)

1635

except AttributeError:

1636

pass

995

attr[attrname] = (dbus.service.method

996

(alt_interface,

997

attribute._dbus_in_signature,

998

attribute._dbus_out_signature)

999

(types.FunctionType

1000

(attribute.func_code,

1001

attribute.func_globals,

1002

attribute.func_name,

1003

attribute.func_defaults,

1004

attribute.func_closure)))

1637

1005

# Is this a D-Bus property?

1638

1006

elif getattr(attribute, "_dbus_is_property", False):

1639

1007

# Create a new, but exactly alike, function

1640

1008

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

1641

1009

# property with the alternate D-Bus interface

1642

1010

# name. Add it to the class.

1643

attr[attrname] = (dbus_service_property(

1644

alt_interface, attribute._dbus_signature,

1645

attribute._dbus_access,

1646

attribute._dbus_get_args_options

1647

["byte_arrays"])

1648

(copy_function(attribute)))

1649

# Copy annotations, if any

1650

try:

1651

attr[attrname]._dbus_annotations = dict(

1652

attribute._dbus_annotations)

1653

except AttributeError:

1654

pass

1655

# Is this a D-Bus interface?

1656

elif getattr(attribute, "_dbus_is_interface", False):

1657

# Create a new, but exactly alike, function

1658

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

1659

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

1660

# to the class.

1661

attr[attrname] = (

1662

dbus_interface_annotations(alt_interface)

1663

(copy_function(attribute)))

1664

if deprecate:

1665

# Deprecate all alternate interfaces

1666

iname="_AlternateDBusNames_interface_annotation{}"

1667

for interface_name in interface_names:

1668

1669

@dbus_interface_annotations(interface_name)

1670

def func(self):

1671

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

1672

"true" }

1673

# Find an unused name

1674

for aname in (iname.format(i)

1675

for i in itertools.count()):

1676

if aname not in attr:

1677

attr[aname] = func

1678

break

1679

if interface_names:

1680

# Replace the class with a new subclass of it with

1681

# methods, signals, etc. as created above.

1682

if sys.version_info.major == 2:

1683

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

1684

(cls, ), attr)

1685

else:

1686

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

1687

(cls, ), attr)

1688

return cls

1689

1690

return wrapper

1691

1692

1693

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

1694

"se.bsnet.fukt.Mandos"})

1011

attr[attrname] = (dbus_service_property

1012

(alt_interface,

1013

attribute._dbus_signature,

1014

attribute._dbus_access,

1015

attribute

1016

._dbus_get_args_options

1017

["byte_arrays"])

1018

(types.FunctionType

1019

(attribute.func_code,

1020

attribute.func_globals,

1021

attribute.func_name,

1022

attribute.func_defaults,

1023

attribute.func_closure)))

1024

return type.__new__(mcs, name, bases, attr)

1025

1026

1695

1027

class ClientDBus(Client, DBusObjectWithProperties):

1696

1028

"""A Client class using D-Bus

1697

1029

1701

1033

"""

1702

1034

1703

1035

runtime_expansions = (Client.runtime_expansions

1704

+ ("dbus_object_path", ))

1705

1706

_interface = "se.recompile.Mandos.Client"

1036

+ ("dbus_object_path",))

1707

1037

1708

1038

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

1709

1039

1710

1040

def __init__(self, bus = None, *args, **kwargs):

1711

1041

self.bus = bus

1712

1042

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

1043

self._approvals_pending = 0

1044

1045

self._approvals_pending = 0

1713

1046

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

1714

1047

# the D-Bus

1715

client_object_name = str(self.name).translate(

1048

client_object_name = unicode(self.name).translate(

1716

1049

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

1717

1050

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

1718

self.dbus_object_path = dbus.ObjectPath(

1719

"/clients/" + client_object_name)

1051

self.dbus_object_path = (dbus.ObjectPath

1052

("/clients/" + client_object_name))

1720

1053

DBusObjectWithProperties.__init__(self, self.bus,

1721

1054

self.dbus_object_path)

1722

1723

def notifychangeproperty(transform_func, dbus_name,

1724

type_func=lambda x: x,

1725

variant_level=1,

1726

invalidate_only=False,

1727

_interface=_interface):

1055

1056

def notifychangeproperty(transform_func,

1057

dbus_name, type_func=lambda x: x,

1058

variant_level=1):

1728

1059

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

1729

1060

its changes to DBus.

1730

1061

1735

1066

to the D-Bus. Default: no transform

1736

1067

variant_level: D-Bus variant level. Default: 1

1737

1068

"""

1738

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

1739

1069

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

1740

1070

def setter(self, value):

1741

1071

if hasattr(self, "dbus_object_path"):

1742

1072

if (not hasattr(self, attrname) or

1743

1073

type_func(getattr(self, attrname, None))

1744

1074

!= type_func(value)):

1745

if invalidate_only:

1746

self.PropertiesChanged(

1747

_interface, dbus.Dictionary(),

1748

dbus.Array((dbus_name, )))

1749

else:

1750

dbus_value = transform_func(

1751

type_func(value),

1752

variant_level = variant_level)

1753

self.PropertyChanged(dbus.String(dbus_name),

1754

dbus_value)

1755

self.PropertiesChanged(

1756

_interface,

1757

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

1758

dbus_value }),

1759

dbus.Array())

1075

dbus_value = transform_func(type_func(value),

1076

variant_level

1077

=variant_level)

1078

self.PropertyChanged(dbus.String(dbus_name),

1079

dbus_value)

1760

1080

setattr(self, attrname, value)

1761

1081

1762

1082

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

1763

1083

1084

1764

1085

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1765

1086

approvals_pending = notifychangeproperty(dbus.Boolean,

1766

1087

"ApprovalPending",

1768

1089

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

1769

1090

last_enabled = notifychangeproperty(datetime_to_dbus,

1770

1091

"LastEnabled")

1771

checker = notifychangeproperty(

1772

dbus.Boolean, "CheckerRunning",

1773

type_func = lambda checker: checker is not None)

1092

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

1093

type_func = lambda checker:

1094

checker is not None)

1774

1095

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1775

1096

"LastCheckedOK")

1776

last_checker_status = notifychangeproperty(dbus.Int16,

1777

"LastCheckerStatus")

1778

1097

last_approval_request = notifychangeproperty(

1779

1098

datetime_to_dbus, "LastApprovalRequest")

1780

1099

approved_by_default = notifychangeproperty(dbus.Boolean,

1781

1100

"ApprovedByDefault")

1782

approval_delay = notifychangeproperty(

1783

dbus.UInt64, "ApprovalDelay",

1784

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

1101

approval_delay = notifychangeproperty(dbus.UInt64,

1102

"ApprovalDelay",

1103

type_func =

1104

timedelta_to_milliseconds)

1785

1105

approval_duration = notifychangeproperty(

1786

1106

dbus.UInt64, "ApprovalDuration",

1787

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

1107

type_func = timedelta_to_milliseconds)

1788

1108

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

1789

timeout = notifychangeproperty(

1790

dbus.UInt64, "Timeout",

1791

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

1109

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

1110

type_func =

1111

timedelta_to_milliseconds)

1792

1112

extended_timeout = notifychangeproperty(

1793

1113

dbus.UInt64, "ExtendedTimeout",

1794

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

1795

interval = notifychangeproperty(

1796

dbus.UInt64, "Interval",

1797

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

1114

type_func = timedelta_to_milliseconds)

1115

interval = notifychangeproperty(dbus.UInt64,

1116

"Interval",

1117

type_func =

1118

timedelta_to_milliseconds)

1798

1119

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

1799

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

1800

invalidate_only=True)

1801

1120

1802

1121

del notifychangeproperty

1803

1122

1810

1129

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

1811

1130

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

1812

1131

1813

def checker_callback(self, source, condition,

1814

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

1815

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

1816

connection, command, *args,

1817

**kwargs)

1818

exitstatus = self.last_checker_status

1819

if exitstatus >= 0:

1132

def checker_callback(self, pid, condition, command,

1133

*args, **kwargs):

1134

self.checker_callback_tag = None

1135

self.checker = None

1136

if os.WIFEXITED(condition):

1137

exitstatus = os.WEXITSTATUS(condition)

1820

1138

# Emit D-Bus signal

1821

1139

self.CheckerCompleted(dbus.Int16(exitstatus),

1822

# This is specific to GNU libC

1823

dbus.Int64(exitstatus << 8),

1140

dbus.Int64(condition),

1824

1141

dbus.String(command))

1825

1142

else:

1826

1143

# Emit D-Bus signal

1827

1144

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

1828

dbus.Int64(

1829

# This is specific to GNU libC

1830

(exitstatus << 8)

1831

| self.last_checker_signal),

1145

dbus.Int64(condition),

1832

1146

dbus.String(command))

1833

return ret

1147

1148

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

1149

*args, **kwargs)

1834

1150

1835

1151

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

1836

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

1152

old_checker = self.checker

1153

if self.checker is not None:

1154

old_checker_pid = self.checker.pid

1155

else:

1156

old_checker_pid = None

1837

1157

r = Client.start_checker(self, *args, **kwargs)

1838

1158

# Only if new checker process was started

1839

1159

if (self.checker is not None

1847

1167

return False

1848

1168

1849

1169

def approve(self, value=True):

1170

self.send_changedstate()

1850

1171

self.approved = value

1851

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

1852

* 1000), self._reset_approved)

1853

self.send_changedstate()

1172

gobject.timeout_add(timedelta_to_milliseconds

1173

(self.approval_duration),

1174

self._reset_approved)

1175

1854

1176

1855

1177

## D-Bus methods, signals & properties

1856

1857

## Interfaces

1178

_interface = "se.recompile.Mandos.Client"

1858

1179

1859

1180

## Signals

1860

1181

1871

1192

pass

1872

1193

1873

1194

# PropertyChanged - signal

1874

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

1875

1195

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

1876

1196

def PropertyChanged(self, property, value):

1877

1197

"D-Bus signal"

1898

1218

"D-Bus signal"

1899

1219

return self.need_approval()

1900

1220

1221

# NeRwequest - signal

1222

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

1223

def NewRequest(self, ip):

1224

"""D-Bus signal

1225

Is sent after a client request a password.

1226

"""

1227

pass

1228

1901

1229

## Methods

1902

1230

1903

1231

# Approve - method

1911

1239

self.checked_ok()

1912

1240

1913

1241

# Enable - method

1914

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

1915

1242

@dbus.service.method(_interface)

1916

1243

def Enable(self):

1917

1244

"D-Bus method"

1918

1245

self.enable()

1919

1246

1920

1247

# StartChecker - method

1921

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

1922

1248

@dbus.service.method(_interface)

1923

1249

def StartChecker(self):

1924

1250

"D-Bus method"

1925

1251

self.start_checker()

1926

1252

1927

1253

# Disable - method

1928

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

1929

1254

@dbus.service.method(_interface)

1930

1255

def Disable(self):

1931

1256

"D-Bus method"

1932

1257

self.disable()

1933

1258

1934

1259

# StopChecker - method

1935

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

1936

1260

@dbus.service.method(_interface)

1937

1261

def StopChecker(self):

1938

1262

self.stop_checker()

1945

1269

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

1946

1270

1947

1271

# ApprovedByDefault - property

1948

@dbus_service_property(_interface,

1949

signature="b",

1272

@dbus_service_property(_interface, signature="b",

1950

1273

access="readwrite")

1951

1274

def ApprovedByDefault_dbus_property(self, value=None):

1952

1275

if value is None: # get

1954

1277

self.approved_by_default = bool(value)

1955

1278

1956

1279

# ApprovalDelay - property

1957

@dbus_service_property(_interface,

1958

signature="t",

1280

@dbus_service_property(_interface, signature="t",

1959

1281

access="readwrite")

1960

1282

def ApprovalDelay_dbus_property(self, value=None):

1961

1283

if value is None: # get

1962

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

1963

* 1000)

1284

return dbus.UInt64(self.approval_delay_milliseconds())

1964

1285

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

1965

1286

1966

1287

# ApprovalDuration - property

1967

@dbus_service_property(_interface,

1968

signature="t",

1288

@dbus_service_property(_interface, signature="t",

1969

1289

access="readwrite")

1970

1290

def ApprovalDuration_dbus_property(self, value=None):

1971

1291

if value is None: # get

1972

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

1973

* 1000)

1292

return dbus.UInt64(timedelta_to_milliseconds(

1293

self.approval_duration))

1974

1294

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

1975

1295

1976

1296

# Name - property

1977

@dbus_annotations(

1978

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

1979

1297

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

1980

1298

def Name_dbus_property(self):

1981

1299

return dbus.String(self.name)

1982

1300

1983

1301

# Fingerprint - property

1984

@dbus_annotations(

1985

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

1986

1302

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

1987

1303

def Fingerprint_dbus_property(self):

1988

1304

return dbus.String(self.fingerprint)

1989

1305

1990

1306

# Host - property

1991

@dbus_service_property(_interface,

1992

signature="s",

1307

@dbus_service_property(_interface, signature="s",

1993

1308

access="readwrite")

1994

1309

def Host_dbus_property(self, value=None):

1995

1310

if value is None: # get

1996

1311

return dbus.String(self.host)

1997

self.host = str(value)

1312

self.host = unicode(value)

1998

1313

1999

1314

# Created - property

2000

@dbus_annotations(

2001

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

2002

1315

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

2003

1316

def Created_dbus_property(self):

2004

1317

return datetime_to_dbus(self.created)

2009

1322

return datetime_to_dbus(self.last_enabled)

2010

1323

2011

1324

# Enabled - property

2012

@dbus_service_property(_interface,

2013

signature="b",

1325

@dbus_service_property(_interface, signature="b",

2014

1326

access="readwrite")

2015

1327

def Enabled_dbus_property(self, value=None):

2016

1328

if value is None: # get

2021

1333

self.disable()

2022

1334

2023

1335

# LastCheckedOK - property

2024

@dbus_service_property(_interface,

2025

signature="s",

1336

@dbus_service_property(_interface, signature="s",

2026

1337

access="readwrite")

2027

1338

def LastCheckedOK_dbus_property(self, value=None):

2028

1339

if value is not None:

2030

1341

return

2031

1342

return datetime_to_dbus(self.last_checked_ok)

2032

1343

2033

# LastCheckerStatus - property

2034

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

2035

def LastCheckerStatus_dbus_property(self):

2036

return dbus.Int16(self.last_checker_status)

2037

2038

1344

# Expires - property

2039

1345

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

2040

1346

def Expires_dbus_property(self):

2046

1352

return datetime_to_dbus(self.last_approval_request)

2047

1353

2048

1354

# Timeout - property

2049

@dbus_service_property(_interface,

2050

signature="t",

1355

@dbus_service_property(_interface, signature="t",

2051

1356

access="readwrite")

2052

1357

def Timeout_dbus_property(self, value=None):

2053

1358

if value is None: # get

2054

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

2055

old_timeout = self.timeout

1359

return dbus.UInt64(self.timeout_milliseconds())

2056

1360

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

2057

# Reschedule disabling

2058

if self.enabled:

2059

now = datetime.datetime.utcnow()

2060

self.expires += self.timeout - old_timeout

2061

if self.expires <= now:

2062

# The timeout has passed

2063

self.disable()

2064

else:

2065

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

2066

is None):

2067

return

2068

GLib.source_remove(self.disable_initiator_tag)

2069

self.disable_initiator_tag = GLib.timeout_add(

2070

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

2071

self.disable)

1361

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

1362

return

1363

# Reschedule timeout

1364

gobject.source_remove(self.disable_initiator_tag)

1365

self.disable_initiator_tag = None

1366

self.expires = None

1367

time_to_die = timedelta_to_milliseconds((self

1368

.last_checked_ok

1369

+ self.timeout)

1370

- datetime.datetime

1371

.utcnow())

1372

if time_to_die <= 0:

1373

# The timeout has passed

1374

self.disable()

1375

else:

1376

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

1377

+ datetime.timedelta(milliseconds =

1378

time_to_die))

1379

self.disable_initiator_tag = (gobject.timeout_add

1380

(time_to_die, self.disable))

2072

1381

2073

1382

# ExtendedTimeout - property

2074

@dbus_service_property(_interface,

2075

signature="t",

1383

@dbus_service_property(_interface, signature="t",

2076

1384

access="readwrite")

2077

1385

def ExtendedTimeout_dbus_property(self, value=None):

2078

1386

if value is None: # get

2079

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

2080

* 1000)

1387

return dbus.UInt64(self.extended_timeout_milliseconds())

2081

1388

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

2082

1389

2083

1390

# Interval - property

2084

@dbus_service_property(_interface,

2085

signature="t",

1391

@dbus_service_property(_interface, signature="t",

2086

1392

access="readwrite")

2087

1393

def Interval_dbus_property(self, value=None):

2088

1394

if value is None: # get

2089

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

1395

return dbus.UInt64(self.interval_milliseconds())

2090

1396

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

2091

1397

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

2092

1398

return

2093

1399

if self.enabled:

2094

1400

# Reschedule checker run

2095

GLib.source_remove(self.checker_initiator_tag)

2096

self.checker_initiator_tag = GLib.timeout_add(

2097

value, self.start_checker)

2098

self.start_checker() # Start one now, too

1401

gobject.source_remove(self.checker_initiator_tag)

1402

self.checker_initiator_tag = (gobject.timeout_add

1403

(value, self.start_checker))

1404

self.start_checker() # Start one now, too

2099

1405

2100

1406

# Checker - property

2101

@dbus_service_property(_interface,

2102

signature="s",

1407

@dbus_service_property(_interface, signature="s",

2103

1408

access="readwrite")

2104

1409

def Checker_dbus_property(self, value=None):

2105

1410

if value is None: # get

2106

1411

return dbus.String(self.checker_command)

2107

self.checker_command = str(value)

1412

self.checker_command = unicode(value)

2108

1413

2109

1414

# CheckerRunning - property

2110

@dbus_service_property(_interface,

2111

signature="b",

1415

@dbus_service_property(_interface, signature="b",

2112

1416

access="readwrite")

2113

1417

def CheckerRunning_dbus_property(self, value=None):

2114

1418

if value is None: # get

2119

1423

self.stop_checker()

2120

1424

2121

1425

# ObjectPath - property

2122

@dbus_annotations(

2123

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

2124

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

2125

1426

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

2126

1427

def ObjectPath_dbus_property(self):

2127

1428

return self.dbus_object_path # is already a dbus.ObjectPath

2128

1429

2129

1430

# Secret = property

2130

@dbus_annotations(

2131

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

2132

"invalidates"})

2133

@dbus_service_property(_interface,

2134

signature="ay",

2135

access="write",

2136

byte_arrays=True)

1431

@dbus_service_property(_interface, signature="ay",

1432

access="write", byte_arrays=True)

2137

1433

def Secret_dbus_property(self, value):

2138

self.secret = bytes(value)

1434

self.secret = str(value)

2139

1435

2140

1436

del _interface

2141

1437

2145

1441

self._pipe = child_pipe

2146

1442

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

2147

1443

if not self._pipe.recv():

2148

raise KeyError(fpr)

1444

raise KeyError()

2149

1445

2150

1446

def __getattribute__(self, name):

2151

1447

if name == '_pipe':

2155

1451

if data[0] == 'data':

2156

1452

return data[1]

2157

1453

if data[0] == 'function':

2158

2159

1454

def func(*args, **kwargs):

2160

1455

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

2161

1456

return self._pipe.recv()[1]

2162

2163

1457

return func

2164

1458

2165

1459

def __setattr__(self, name, value):

2168

1462

self._pipe.send(('setattr', name, value))

2169

1463

2170

1464

1465

class ClientDBusTransitional(ClientDBus):

1466

__metaclass__ = AlternateDBusNamesMetaclass

1467

1468

2171

1469

class ClientHandler(socketserver.BaseRequestHandler, object):

2172

1470

"""A class to handle client connections.

2173

1471

2177

1475

def handle(self):

2178

1476

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

2179

1477

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

2180

str(self.client_address))

1478

unicode(self.client_address))

2181

1479

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

2182

1480

self.server.child_pipe.fileno())

2183

1481

2184

session = gnutls.ClientSession(self.request)

1482

session = (gnutls.connection

1483

.ClientSession(self.request,

1484

gnutls.connection

1485

.X509Credentials()))

1486

1487

# Note: gnutls.connection.X509Credentials is really a

1488

# generic GnuTLS certificate credentials object so long as

1489

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

1490

# here despite using OpenPGP certificates.

2185

1491

2186

1492

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

2187

1493

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

2191

1497

priority = self.server.gnutls_priority

2192

1498

if priority is None:

2193

1499

priority = "NORMAL"

2194

gnutls.priority_set_direct(session._c_object,

2195

priority.encode("utf-8"),

2196

None)

1500

(gnutls.library.functions

1501

.gnutls_priority_set_direct(session._c_object,

1502

priority, None))

2197

1503

2198

1504

# Start communication using the Mandos protocol

2199

1505

# Get protocol number

2201

1507

logger.debug("Protocol version: %r", line)

2202

1508

try:

2203

1509

if int(line.strip().split()[0]) > 1:

2204

raise RuntimeError(line)

1510

raise RuntimeError

2205

1511

except (ValueError, IndexError, RuntimeError) as error:

2206

1512

logger.error("Unknown protocol version: %s", error)

2207

1513

return

2209

1515

# Start GnuTLS connection

2210

1516

try:

2211

1517

session.handshake()

2212

except gnutls.Error as error:

1518

except gnutls.errors.GNUTLSError as error:

2213

1519

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

2214

1520

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

2215

1521

# established. Just abandon the request.

2219

1525

approval_required = False

2220

1526

try:

2221

1527

try:

2222

fpr = self.fingerprint(

2223

self.peer_certificate(session))

2224

except (TypeError, gnutls.Error) as error:

1528

fpr = self.fingerprint(self.peer_certificate

1529

(session))

1530

except (TypeError,

1531

gnutls.errors.GNUTLSError) as error:

2225

1532

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

2226

1533

return

2227

1534

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

2232

1539

except KeyError:

2233

1540

return

2234

1541

1542

if self.server.use_dbus:

1543

# Emit D-Bus signal

1544

client.NewRequest(str(self.client_address))

1545

2235

1546

if client.approval_delay:

2236

1547

delay = client.approval_delay

2237

1548

client.approvals_pending += 1

2240

1551

while True:

2241

1552

if not client.enabled:

2242

1553

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

2243

client.name)

1554

client.name)

2244

1555

if self.server.use_dbus:

2245

1556

# Emit D-Bus signal

2246

1557

client.Rejected("Disabled")

2255

1566

if self.server.use_dbus:

2256

1567

# Emit D-Bus signal

2257

1568

client.NeedApproval(

2258

client.approval_delay.total_seconds()

2259

* 1000, client.approved_by_default)

1569

client.approval_delay_milliseconds(),

1570

client.approved_by_default)

2260

1571

else:

2261

1572

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

2262

1573

client.name)

2268

1579

#wait until timeout or approved

2269

1580

time = datetime.datetime.now()

2270

1581

client.changedstate.acquire()

2271

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

1582

(client.changedstate.wait

1583

(float(client.timedelta_to_milliseconds(delay)

1584

/ 1000)))

2272

1585

client.changedstate.release()

2273

1586

time2 = datetime.datetime.now()

2274

1587

if (time2 - time) >= delay:

2285

1598

else:

2286

1599

delay -= time2 - time

2287

1600

2288

try:

2289

session.send(client.secret)

2290

except gnutls.Error as error:

2291

logger.warning("gnutls send failed",

2292

exc_info = error)

2293

return

1601

sent_size = 0

1602

while sent_size < len(client.secret):

1603

try:

1604

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

1605

except gnutls.errors.GNUTLSError as error:

1606

logger.warning("gnutls send failed")

1607

return

1608

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

1609

sent, len(client.secret)

1610

- (sent_size + sent))

1611

sent_size += sent

2294

1612

2295

1613

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

2296

1614

# bump the timeout using extended_timeout

2297

client.bump_timeout(client.extended_timeout)

1615

client.checked_ok(client.extended_timeout)

2298

1616

if self.server.use_dbus:

2299

1617

# Emit D-Bus signal

2300

1618

client.GotSecret()

2304

1622

client.approvals_pending -= 1

2305

1623

try:

2306

1624

session.bye()

2307

except gnutls.Error as error:

2308

logger.warning("GnuTLS bye failed",

2309

exc_info=error)

1625

except gnutls.errors.GNUTLSError as error:

1626

logger.warning("GnuTLS bye failed")

2310

1627

2311

1628

@staticmethod

2312

1629

def peer_certificate(session):

2313

1630

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

2314

1631

# If not an OpenPGP certificate...

2315

if (gnutls.certificate_type_get(session._c_object)

2316

!= gnutls.CRT_OPENPGP):

2317

# ...return invalid data

2318

return b""

1632

if (gnutls.library.functions

1633

.gnutls_certificate_type_get(session._c_object)

1634

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1635

# ...do the normal thing

1636

return session.peer_certificate

2319

1637

list_size = ctypes.c_uint(1)

2320

cert_list = (gnutls.certificate_get_peers

1638

cert_list = (gnutls.library.functions

1639

.gnutls_certificate_get_peers

2321

1640

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

2322

1641

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

2323

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

1642

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

1643

" certificate")

2324

1644

if list_size.value == 0:

2325

1645

return None

2326

1646

cert = cert_list[0]

2330

1650

def fingerprint(openpgp):

2331

1651

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2332

1652

# New GnuTLS "datum" with the OpenPGP public key

2333

datum = gnutls.datum_t(

2334

ctypes.cast(ctypes.c_char_p(openpgp),

2335

ctypes.POINTER(ctypes.c_ubyte)),

2336

ctypes.c_uint(len(openpgp)))

1653

datum = (gnutls.library.types

1654

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

1655

ctypes.POINTER

1656

(ctypes.c_ubyte)),

1657

ctypes.c_uint(len(openpgp))))

2337

1658

# New empty GnuTLS certificate

2338

crt = gnutls.openpgp_crt_t()

2339

gnutls.openpgp_crt_init(ctypes.byref(crt))

1659

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1660

(gnutls.library.functions

1661

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2340

1662

# Import the OpenPGP public key into the certificate

2341

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

2342

gnutls.OPENPGP_FMT_RAW)

1663

(gnutls.library.functions

1664

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

1665

gnutls.library.constants

1666

.GNUTLS_OPENPGP_FMT_RAW))

2343

1667

# Verify the self signature in the key

2344

1668

crtverify = ctypes.c_uint()

2345

gnutls.openpgp_crt_verify_self(crt, 0,

2346

ctypes.byref(crtverify))

1669

(gnutls.library.functions

1670

.gnutls_openpgp_crt_verify_self(crt, 0,

1671

ctypes.byref(crtverify)))

2347

1672

if crtverify.value != 0:

2348

gnutls.openpgp_crt_deinit(crt)

2349

raise gnutls.CertificateSecurityError("Verify failed")

1673

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1674

raise (gnutls.errors.CertificateSecurityError

1675

("Verify failed"))

2350

1676

# New buffer for the fingerprint

2351

1677

buf = ctypes.create_string_buffer(20)

2352

1678

buf_len = ctypes.c_size_t()

2353

1679

# Get the fingerprint from the certificate into the buffer

2354

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

2355

ctypes.byref(buf_len))

1680

(gnutls.library.functions

1681

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

1682

ctypes.byref(buf_len)))

2356

1683

# Deinit the certificate

2357

gnutls.openpgp_crt_deinit(crt)

1684

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2358

1685

# Convert the buffer to a Python bytestring

2359

1686

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

2360

1687

# Convert the bytestring to hexadecimal notation

2364

1691

2365

1692

class MultiprocessingMixIn(object):

2366

1693

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

2367

2368

1694

def sub_process_main(self, request, address):

2369

1695

try:

2370

1696

self.finish_request(request, address)

2375

1701

def process_request(self, request, address):

2376

1702

"""Start a new process to process the request."""

2377

1703

proc = multiprocessing.Process(target = self.sub_process_main,

2378

args = (request, address))

1704

args = (request,

1705

address))

2379

1706

proc.start()

2380

1707

return proc

2381

1708

2382

1709

2383

1710

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2384

1711

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

2385

2386

1712

def process_request(self, request, client_address):

2387

1713

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

2388

1714

2397

1723

2398

1724

def add_pipe(self, parent_pipe, proc):

2399

1725

"""Dummy function; override as necessary"""

2400

raise NotImplementedError()

1726

raise NotImplementedError

2401

1727

2402

1728

2403

1729

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2409

1735

interface: None or a network interface name (string)

2410

1736

use_ipv6: Boolean; to use IPv6 or not

2411

1737

"""

2412

2413

1738

def __init__(self, server_address, RequestHandlerClass,

2414

interface=None,

2415

use_ipv6=True,

2416

socketfd=None):

2417

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

2418

creating a new one with socket.socket().

2419

"""

1739

interface=None, use_ipv6=True):

2420

1740

self.interface = interface

2421

1741

if use_ipv6:

2422

1742

self.address_family = socket.AF_INET6

2423

if socketfd is not None:

2424

# Save the file descriptor

2425

self.socketfd = socketfd

2426

# Save the original socket.socket() function

2427

self.socket_socket = socket.socket

2428

# To implement --socket, we monkey patch socket.socket.

2429

#

2430

# (When socketserver.TCPServer is a new-style class, we

2431

# could make self.socket into a property instead of monkey

2432

# patching socket.socket.)

2433

#

2434

# Create a one-time-only replacement for socket.socket()

2435

@functools.wraps(socket.socket)

2436

def socket_wrapper(*args, **kwargs):

2437

# Restore original function so subsequent calls are

2438

# not affected.

2439

socket.socket = self.socket_socket

2440

del self.socket_socket

2441

# This time only, return a new socket object from the

2442

# saved file descriptor.

2443

return socket.fromfd(self.socketfd, *args, **kwargs)

2444

# Replace socket.socket() function with wrapper

2445

socket.socket = socket_wrapper

2446

# The socketserver.TCPServer.__init__ will call

2447

# socket.socket(), which might be our replacement,

2448

# socket_wrapper(), if socketfd was set.

2449

1743

socketserver.TCPServer.__init__(self, server_address,

2450

1744

RequestHandlerClass)

2451

2452

1745

def server_bind(self):

2453

1746

"""This overrides the normal server_bind() function

2454

1747

to bind to an interface if one was specified, and also NOT to

2455

1748

bind to an address or port if they were not specified."""

2456

global SO_BINDTODEVICE

2457

1749

if self.interface is not None:

2458

1750

if SO_BINDTODEVICE is None:

2459

# Fall back to a hard-coded value which seems to be

2460

# common enough.

2461

logger.warning("SO_BINDTODEVICE not found, trying 25")

2462

SO_BINDTODEVICE = 25

2463

try:

2464

self.socket.setsockopt(

2465

socket.SOL_SOCKET, SO_BINDTODEVICE,

2466

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

2467

except socket.error as error:

2468

if error.errno == errno.EPERM:

2469

logger.error("No permission to bind to"

2470

" interface %s", self.interface)

2471

elif error.errno == errno.ENOPROTOOPT:

2472

logger.error("SO_BINDTODEVICE not available;"

2473

" cannot bind to interface %s",

2474

self.interface)

2475

elif error.errno == errno.ENODEV:

2476

logger.error("Interface %s does not exist,"

2477

" cannot bind", self.interface)

2478

else:

2479

raise

1751

logger.error("SO_BINDTODEVICE does not exist;"

1752

" cannot bind to interface %s",

1753

self.interface)

1754

else:

1755

try:

1756

self.socket.setsockopt(socket.SOL_SOCKET,

1757

SO_BINDTODEVICE,

1758

str(self.interface

1759

+ '\0'))

1760

except socket.error as error:

1761

if error[0] == errno.EPERM:

1762

logger.error("No permission to"

1763

" bind to interface %s",

1764

self.interface)

1765

elif error[0] == errno.ENOPROTOOPT:

1766

logger.error("SO_BINDTODEVICE not available;"

1767

" cannot bind to interface %s",

1768

self.interface)

1769

else:

1770

raise

2480

1771

# Only bind(2) the socket if we really need to.

2481

1772

if self.server_address[0] or self.server_address[1]:

2482

1773

if not self.server_address[0]:

2483

1774

if self.address_family == socket.AF_INET6:

2484

1775

any_address = "::" # in6addr_any

2485

1776

else:

2486

any_address = "0.0.0.0" # INADDR_ANY

1777

any_address = socket.INADDR_ANY

2487

1778

self.server_address = (any_address,

2488

1779

self.server_address[1])

2489

1780

elif not self.server_address[1]:

2490

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

1781

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

1782

0)

2491

1783

# if self.interface:

2492

1784

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

2493

1785

# 0, # port

2505

1797

gnutls_priority GnuTLS priority string

2506

1798

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

2507

1799

2508

Assumes a GLib.MainLoop event loop.

1800

Assumes a gobject.MainLoop event loop.

2509

1801

"""

2510

2511

1802

def __init__(self, server_address, RequestHandlerClass,

2512

interface=None,

2513

use_ipv6=True,

2514

clients=None,

2515

gnutls_priority=None,

2516

use_dbus=True,

2517

socketfd=None):

1803

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

1804

gnutls_priority=None, use_dbus=True):

2518

1805

self.enabled = False

2519

1806

self.clients = clients

2520

1807

if self.clients is None:

2524

1811

IPv6_TCPServer.__init__(self, server_address,

2525

1812

RequestHandlerClass,

2526

1813

interface = interface,

2527

use_ipv6 = use_ipv6,

2528

socketfd = socketfd)

2529

1814

use_ipv6 = use_ipv6)

2530

1815

def server_activate(self):

2531

1816

if self.enabled:

2532

1817

return socketserver.TCPServer.server_activate(self)

2536

1821

2537

1822

def add_pipe(self, parent_pipe, proc):

2538

1823

# Call "handle_ipc" for both data and EOF events

2539

GLib.io_add_watch(

2540

parent_pipe.fileno(),

2541

GLib.IO_IN | GLib.IO_HUP,

2542

functools.partial(self.handle_ipc,

2543

parent_pipe = parent_pipe,

2544

proc = proc))

1824

gobject.io_add_watch(parent_pipe.fileno(),

1825

gobject.IO_IN | gobject.IO_HUP,

1826

functools.partial(self.handle_ipc,

1827

parent_pipe =

1828

parent_pipe,

1829

proc = proc))

2545

1830

2546

def handle_ipc(self, source, condition,

2547

parent_pipe=None,

2548

proc = None,

2549

client_object=None):

1831

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

1832

proc = None, client_object=None):

1833

condition_names = {

1834

gobject.IO_IN: "IN", # There is data to read.

1835

gobject.IO_OUT: "OUT", # Data can be written (without

1836

# blocking).

1837

gobject.IO_PRI: "PRI", # There is urgent data to read.

1838

gobject.IO_ERR: "ERR", # Error condition.

1839

gobject.IO_HUP: "HUP" # Hung up (the connection has been

1840

# broken, usually for pipes and

1841

# sockets).

1842

}

1843

conditions_string = ' | '.join(name

1844

for cond, name in

1845

condition_names.iteritems()

1846

if cond & condition)

2550

1847

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

2551

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

1848

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

2552

1849

# Wait for other process to exit

2553

1850

proc.join()

2554

1851

return False

2561

1858

fpr = request[1]

2562

1859

address = request[2]

2563

1860

2564

for c in self.clients.values():

1861

for c in self.clients.itervalues():

2565

1862

if c.fingerprint == fpr:

2566

1863

client = c

2567

1864

break

2575

1872

parent_pipe.send(False)

2576

1873

return False

2577

1874

2578

GLib.io_add_watch(

2579

parent_pipe.fileno(),

2580

GLib.IO_IN | GLib.IO_HUP,

2581

functools.partial(self.handle_ipc,

2582

parent_pipe = parent_pipe,

2583

proc = proc,

2584

client_object = client))

1875

gobject.io_add_watch(parent_pipe.fileno(),

1876

gobject.IO_IN | gobject.IO_HUP,

1877

functools.partial(self.handle_ipc,

1878

parent_pipe =

1879

parent_pipe,

1880

proc = proc,

1881

client_object =

1882

client))

2585

1883

parent_pipe.send(True)

2586

1884

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

2587

1885

# same fileno

2593

1891

2594

1892

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

2595

1893

funcname)(*args,

2596

**kwargs)))

1894

**kwargs)))

2597

1895

2598

1896

if command == 'getattr':

2599

1897

attrname = request[1]

2600

if isinstance(client_object.__getattribute__(attrname),

2601

collections.Callable):

2602

parent_pipe.send(('function', ))

1898

if callable(client_object.__getattribute__(attrname)):

1899

parent_pipe.send(('function',))

2603

1900

else:

2604

parent_pipe.send((

2605

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

1901

parent_pipe.send(('data', client_object

1902

.__getattribute__(attrname)))

2606

1903

2607

1904

if command == 'setattr':

2608

1905

attrname = request[1]

2612

1909

return True

2613

1910

2614

1911

2615

def rfc3339_duration_to_delta(duration):

2616

"""Parse an RFC 3339 "duration" and return a datetime.timedelta

2617

2618

>>> rfc3339_duration_to_delta("P7D")

2619

datetime.timedelta(7)

2620

>>> rfc3339_duration_to_delta("PT60S")

2621

datetime.timedelta(0, 60)

2622

>>> rfc3339_duration_to_delta("PT60M")

2623

datetime.timedelta(0, 3600)

2624

>>> rfc3339_duration_to_delta("PT24H")

2625

datetime.timedelta(1)

2626

>>> rfc3339_duration_to_delta("P1W")

2627

datetime.timedelta(7)

2628

>>> rfc3339_duration_to_delta("PT5M30S")

2629

datetime.timedelta(0, 330)

2630

>>> rfc3339_duration_to_delta("P1DT3M20S")

2631

datetime.timedelta(1, 200)

2632

"""

2633

2634

# Parsing an RFC 3339 duration with regular expressions is not

2635

# possible - there would have to be multiple places for the same

2636

# values, like seconds. The current code, while more esoteric, is

2637

# cleaner without depending on a parsing library. If Python had a

2638

# built-in library for parsing we would use it, but we'd like to

2639

# avoid excessive use of external libraries.

2640

2641

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

2642

Token = collections.namedtuple("Token", (

2643

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

2644

# a "group" containing digits

2645

"value", # datetime.timedelta or None

2646

"followers")) # Tokens valid after this token

2647

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

2648

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

2649

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

2650

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

2651

datetime.timedelta(seconds=1),

2652

frozenset((token_end, )))

2653

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

2654

datetime.timedelta(minutes=1),

2655

frozenset((token_second, token_end)))

2656

token_hour = Token(re.compile(r"(\d+)H"),

2657

datetime.timedelta(hours=1),

2658

frozenset((token_minute, token_end)))

2659

token_time = Token(re.compile(r"T"),

2660

None,

2661

frozenset((token_hour, token_minute,

2662

token_second)))

2663

token_day = Token(re.compile(r"(\d+)D"),

2664

datetime.timedelta(days=1),

2665

frozenset((token_time, token_end)))

2666

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

2667

datetime.timedelta(weeks=4),

2668

frozenset((token_day, token_end)))

2669

token_year = Token(re.compile(r"(\d+)Y"),

2670

datetime.timedelta(weeks=52),

2671

frozenset((token_month, token_end)))

2672

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

2673

datetime.timedelta(weeks=1),

2674

frozenset((token_end, )))

2675

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

2676

frozenset((token_year, token_month,

2677

token_day, token_time,

2678

token_week)))

2679

# Define starting values

2680

value = datetime.timedelta() # Value so far

2681

found_token = None

2682

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

2683

s = duration # String left to parse

2684

# Loop until end token is found

2685

while found_token is not token_end:

2686

# Search for any currently valid tokens

2687

for token in followers:

2688

match = token.regexp.match(s)

2689

if match is not None:

2690

# Token found

2691

if token.value is not None:

2692

# Value found, parse digits

2693

factor = int(match.group(1), 10)

2694

# Add to value so far

2695

value += factor * token.value

2696

# Strip token from string

2697

s = token.regexp.sub("", s, 1)

2698

# Go to found token

2699

found_token = token

2700

# Set valid next tokens

2701

followers = found_token.followers

2702

break

2703

else:

2704

# No currently valid tokens were found

2705

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

2706

.format(duration))

2707

# End token found

2708

return value

2709

2710

2711

1912

def string_to_delta(interval):

2712

1913

"""Parse a string and return a datetime.timedelta

2713

1914

2724

1925

>>> string_to_delta('5m 30s')

2725

1926

datetime.timedelta(0, 330)

2726

1927

"""

2727

2728

try:

2729

return rfc3339_duration_to_delta(interval)

2730

except ValueError:

2731

pass

2732

2733

1928

timevalue = datetime.timedelta(0)

2734

1929

for s in interval.split():

2735

1930

try:

2736

suffix = s[-1]

1931

suffix = unicode(s[-1])

2737

1932

value = int(s[:-1])

2738

1933

if suffix == "d":

2739

1934

delta = datetime.timedelta(value)

2746

1941

elif suffix == "w":

2747

1942

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

2748

1943

else:

2749

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

2750

except IndexError as e:

1944

raise ValueError("Unknown suffix %r" % suffix)

1945

except (ValueError, IndexError) as e:

2751

1946

raise ValueError(*(e.args))

2752

1947

timevalue += delta

2753

1948

return timevalue

2766

1961

sys.exit()

2767

1962

if not noclose:

2768

1963

# Close all standard open file descriptors

2769

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

1964

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

2770

1965

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

2771

1966

raise OSError(errno.ENODEV,

2772

"{} not a character device"

2773

.format(os.devnull))

1967

"%s not a character device"

1968

% os.path.devnull)

2774

1969

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

2775

1970

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

2776

1971

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

2785

1980

2786

1981

parser = argparse.ArgumentParser()

2787

1982

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

2788

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

1983

version = "%%(prog)s %s" % version,

2789

1984

help="show version number and exit")

2790

1985

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

2791

1986

help="Bind to interface IF")

2797

1992

help="Run self-test")

2798

1993

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

2799

1994

help="Debug mode; run in foreground and log"

2800

" to terminal", default=None)

1995

" to terminal")

2801

1996

parser.add_argument("--debuglevel", metavar="LEVEL",

2802

1997

help="Debug level for stdout output")

2803

1998

parser.add_argument("--priority", help="GnuTLS"

2810

2005

" files")

2811

2006

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

2812

2007

dest="use_dbus", help="Do not provide D-Bus"

2813

" system bus interface", default=None)

2008

" system bus interface")

2814

2009

parser.add_argument("--no-ipv6", action="store_false",

2815

dest="use_ipv6", help="Do not use IPv6",

2816

default=None)

2010

dest="use_ipv6", help="Do not use IPv6")

2817

2011

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

2818

2012

dest="restore", help="Do not restore stored"

2819

" state", default=None)

2820

parser.add_argument("--socket", type=int,

2821

help="Specify a file descriptor to a network"

2822

" socket to use instead of creating one")

2013

" state")

2823

2014

parser.add_argument("--statedir", metavar="DIR",

2824

2015

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

2825

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

2826

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

2827

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

2828

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

2829

default=None)

2830

2016

2831

2017

options = parser.parse_args()

2832

2018

2833

2019

if options.check:

2834

2020

import doctest

2835

fail_count, test_count = doctest.testmod()

2836

sys.exit(os.EX_OK if fail_count == 0 else 1)

2021

doctest.testmod()

2022

sys.exit()

2837

2023

2838

2024

# Default values for config file for server-global settings

2839

2025

server_defaults = { "interface": "",

2841

2027

"port": "",

2842

2028

"debug": "False",

2843

2029

"priority":

2844

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

2845

":+SIGN-DSA-SHA256",

2030

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

2846

2031

"servicename": "Mandos",

2847

2032

"use_dbus": "True",

2848

2033

"use_ipv6": "True",

2849

2034

"debuglevel": "",

2850

2035

"restore": "True",

2851

"socket": "",

2852

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

2853

"foreground": "False",

2854

"zeroconf": "True",

2855

}

2036

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

2037

}

2856

2038

2857

2039

# Parse config file for server-global settings

2858

2040

server_config = configparser.SafeConfigParser(server_defaults)

2859

2041

del server_defaults

2860

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

2042

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

2043

"mandos.conf"))

2861

2044

# Convert the SafeConfigParser object to a dict

2862

2045

server_settings = server_config.defaults()

2863

2046

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

2864

for option in ("debug", "use_dbus", "use_ipv6", "foreground"):

2047

for option in ("debug", "use_dbus", "use_ipv6"):

2865

2048

server_settings[option] = server_config.getboolean("DEFAULT",

2866

2049

option)

2867

2050

if server_settings["port"]:

2868

2051

server_settings["port"] = server_config.getint("DEFAULT",

2869

2052

"port")

2870

if server_settings["socket"]:

2871

server_settings["socket"] = server_config.getint("DEFAULT",

2872

"socket")

2873

# Later, stdin will, and stdout and stderr might, be dup'ed

2874

# over with an opened os.devnull. But we don't want this to

2875

# happen with a supplied network socket.

2876

if 0 <= server_settings["socket"] <= 2:

2877

server_settings["socket"] = os.dup(server_settings

2878

["socket"])

2879

2053

del server_config

2880

2054

2881

2055

# Override the settings from the config file with command line

2882

2056

# options, if set.

2883

2057

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

2884

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

2885

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

2886

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

2058

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

2059

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

2060

"statedir"):

2887

2061

value = getattr(options, option)

2888

2062

if value is not None:

2889

2063

server_settings[option] = value

2890

2064

del options

2891

2065

# Force all strings to be unicode

2892

2066

for option in server_settings.keys():

2893

if isinstance(server_settings[option], bytes):

2894

server_settings[option] = (server_settings[option]

2895

.decode("utf-8"))

2896

# Force all boolean options to be boolean

2897

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

2898

"foreground", "zeroconf"):

2899

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

2900

# Debug implies foreground

2901

if server_settings["debug"]:

2902

server_settings["foreground"] = True

2067

if type(server_settings[option]) is str:

2068

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

2903

2069

# Now we have our good server settings in "server_settings"

2904

2070

2905

2071

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

2906

2072

2907

if (not server_settings["zeroconf"]

2908

and not (server_settings["port"]

2909

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

2910

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

2911

2912

2073

# For convenience

2913

2074

debug = server_settings["debug"]

2914

2075

debuglevel = server_settings["debuglevel"]

2916

2077

use_ipv6 = server_settings["use_ipv6"]

2917

2078

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

2918

2079

stored_state_file)

2919

foreground = server_settings["foreground"]

2920

zeroconf = server_settings["zeroconf"]

2921

2080

2922

2081

if debug:

2923

2082

initlogger(debug, logging.DEBUG)

2929

2088

initlogger(debug, level)

2930

2089

2931

2090

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

2932

syslogger.setFormatter(

2933

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

2934

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

2935

server_settings["servicename"])))

2091

syslogger.setFormatter(logging.Formatter

2092

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

2093

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

2094

% server_settings["servicename"]))

2936

2095

2937

2096

# Parse config file with clients

2938

client_config = configparser.SafeConfigParser(Client

2939

.client_defaults)

2097

client_config = configparser.SafeConfigParser(Client.client_defaults)

2940

2098

client_config.read(os.path.join(server_settings["configdir"],

2941

2099

"clients.conf"))

2942

2100

2943

2101

global mandos_dbus_service

2944

2102

mandos_dbus_service = None

2945

2103

2946

socketfd = None

2947

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

2948

socketfd = server_settings["socket"]

2949

tcp_server = MandosServer(

2950

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

2951

ClientHandler,

2952

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

2953

use_ipv6=use_ipv6,

2954

gnutls_priority=server_settings["priority"],

2955

use_dbus=use_dbus,

2956

socketfd=socketfd)

2957

if not foreground:

2958

pidfilename = "/run/mandos.pid"

2959

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

2960

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

2961

pidfile = None

2104

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

2105

server_settings["port"]),

2106

ClientHandler,

2107

interface=(server_settings["interface"]

2108

or None),

2109

use_ipv6=use_ipv6,

2110

gnutls_priority=

2111

server_settings["priority"],

2112

use_dbus=use_dbus)

2113

if not debug:

2114

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

2962

2115

try:

2963

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

2964

except IOError as e:

2965

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

2966

exc_info=e)

2116

pidfile = open(pidfilename, "w")

2117

except IOError:

2118

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

2967

2119

2968

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

2969

("mandos", "mandos"),

2970

("nobody", "nogroup")):

2120

try:

2121

uid = pwd.getpwnam("_mandos").pw_uid

2122

gid = pwd.getpwnam("_mandos").pw_gid

2123

except KeyError:

2971

2124

try:

2972

uid = pwd.getpwnam(name).pw_uid

2973

gid = pwd.getpwnam(group).pw_gid

2974

break

2125

uid = pwd.getpwnam("mandos").pw_uid

2126

gid = pwd.getpwnam("mandos").pw_gid

2975

2127

except KeyError:

2976

continue

2977

else:

2978

uid = 65534

2979

gid = 65534

2128

try:

2129

uid = pwd.getpwnam("nobody").pw_uid

2130

gid = pwd.getpwnam("nobody").pw_gid

2131

except KeyError:

2132

uid = 65534

2133

gid = 65534

2980

2134

try:

2981

2135

os.setgid(gid)

2982

2136

os.setuid(uid)

2983

if debug:

2984

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

2985

gid))

2986

2137

except OSError as error:

2987

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

2988

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

2989

if error.errno != errno.EPERM:

2990

raise

2138

if error[0] != errno.EPERM:

2139

raise error

2991

2140

2992

2141

if debug:

2993

2142

# Enable all possible GnuTLS debugging

2994

2143

2995

2144

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

2996

2145

# - GnuTLS manual

2997

gnutls.global_set_log_level(11)

2146

gnutls.library.functions.gnutls_global_set_log_level(11)

2998

2147

2999

@gnutls.log_func

2148

@gnutls.library.types.gnutls_log_func

3000

2149

def debug_gnutls(level, string):

3001

2150

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

3002

2151

3003

gnutls.global_set_log_function(debug_gnutls)

2152

(gnutls.library.functions

2153

.gnutls_global_set_log_function(debug_gnutls))

3004

2154

3005

2155

# Redirect stdin so all checkers get /dev/null

3006

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

2156

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

3007

2157

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

3008

2158

if null > 2:

3009

2159

os.close(null)

3010

2160

3011

2161

# Need to fork before connecting to D-Bus

3012

if not foreground:

2162

if not debug:

3013

2163

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

3014

2164

daemon()

3015

2165

3016

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

3017

# to inform GLib that threads will be used.

3018

GLib.threads_init()

2166

gobject.threads_init()

3019

2167

3020

2168

global main_loop

3021

2169

# From the Avahi example code

3022

DBusGMainLoop(set_as_default=True)

3023

main_loop = GLib.MainLoop()

2170

DBusGMainLoop(set_as_default=True )

2171

main_loop = gobject.MainLoop()

3024

2172

bus = dbus.SystemBus()

3025

2173

# End of Avahi example code

3026

2174

if use_dbus:

3027

2175

try:

3028

2176

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

3029

bus,

3030

do_not_queue=True)

3031

old_bus_name = dbus.service.BusName(

3032

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

3033

do_not_queue=True)

3034

except dbus.exceptions.DBusException as e:

3035

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

2177

bus, do_not_queue=True)

2178

old_bus_name = (dbus.service.BusName

2179

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

2180

do_not_queue=True))

2181

except dbus.exceptions.NameExistsException as e:

2182

logger.error(unicode(e) + ", disabling D-Bus")

3036

2183

use_dbus = False

3037

2184

server_settings["use_dbus"] = False

3038

2185

tcp_server.use_dbus = False

3039

if zeroconf:

3040

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3041

service = AvahiServiceToSyslog(

3042

name = server_settings["servicename"],

3043

servicetype = "_mandos._tcp",

3044

protocol = protocol,

3045

bus = bus)

3046

if server_settings["interface"]:

3047

service.interface = if_nametoindex(

3048

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

2186

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2187

service = AvahiServiceToSyslog(name =

2188

server_settings["servicename"],

2189

servicetype = "_mandos._tcp",

2190

protocol = protocol, bus = bus)

2191

if server_settings["interface"]:

2192

service.interface = (if_nametoindex

2193

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

3049

2194

3050

2195

global multiprocessing_manager

3051

2196

multiprocessing_manager = multiprocessing.Manager()

3052

2197

3053

2198

client_class = Client

3054

2199

if use_dbus:

3055

client_class = functools.partial(ClientDBus, bus = bus)

2200

client_class = functools.partial(ClientDBusTransitional,

2201

bus = bus)

3056

2202

3057

2203

client_settings = Client.config_parser(client_config)

3058

2204

old_client_settings = {}

3059

2205

clients_data = {}

3060

2206

3061

# This is used to redirect stdout and stderr for checker processes

3062

global wnull

3063

wnull = open(os.devnull, "w") # A writable /dev/null

3064

# Only used if server is running in foreground but not in debug

3065

# mode

3066

if debug or not foreground:

3067

wnull.close()

3068

3069

2207

# Get client data and settings from last running state.

3070

2208

if server_settings["restore"]:

3071

2209

try:

3072

2210

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

3073

if sys.version_info.major == 2:

3074

clients_data, old_client_settings = pickle.load(

3075

stored_state)

3076

else:

3077

bytes_clients_data, bytes_old_client_settings = (

3078

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

3079

### Fix bytes to strings

3080

## clients_data

3081

# .keys()

3082

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

3083

if isinstance(key, bytes)

3084

else key): value

3085

for key, value in

3086

bytes_clients_data.items() }

3087

del bytes_clients_data

3088

for key in clients_data:

3089

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

3090

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

3091

for k, v in

3092

clients_data[key].items() }

3093

clients_data[key] = value

3094

# .client_structure

3095

value["client_structure"] = [

3096

(s.decode("utf-8")

3097

if isinstance(s, bytes)

3098

else s) for s in

3099

value["client_structure"] ]

3100

# .name & .host

3101

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

3102

if isinstance(value[k], bytes):

3103

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

3104

## old_client_settings

3105

# .keys()

3106

old_client_settings = {

3107

(key.decode("utf-8")

3108

if isinstance(key, bytes)

3109

else key): value

3110

for key, value in

3111

bytes_old_client_settings.items() }

3112

del bytes_old_client_settings

3113

# .host

3114

for value in old_client_settings.values():

3115

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

3116

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

3117

.decode("utf-8"))

2211

clients_data, old_client_settings = (pickle.load

2212

(stored_state))

3118

2213

os.remove(stored_state_path)

3119

2214

except IOError as e:

3120

if e.errno == errno.ENOENT:

3121

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

3122

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

3123

else:

3124

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

3125

exc_info=e)

2215

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

2216

.format(e))

2217

if e.errno != errno.ENOENT:

3126

2218

raise

3127

2219

except EOFError as e:

3128

2220

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

3129

"EOFError:",

3130

exc_info=e)

2221

"EOFError: {0}".format(e))

3131

2222

3132

2223

with PGPEngine() as pgp:

3133

for client_name, client in clients_data.items():

3134

# Skip removed clients

3135

if client_name not in client_settings:

3136

continue

3137

2224

for client_name, client in clients_data.iteritems():

3138

2225

# Decide which value to use after restoring saved state.

3139

2226

# We have three different values: Old config file,

3140

2227

# new config file, and saved state.

3145

2232

# For each value in new config, check if it

3146

2233

# differs from the old config value (Except for

3147

2234

# the "secret" attribute)

3148

if (name != "secret"

3149

and (value !=

3150

old_client_settings[client_name][name])):

2235

if (name != "secret" and

2236

value != old_client_settings[client_name]

2237

[name]):

3151

2238

client[name] = value

3152

2239

except KeyError:

3153

2240

pass

3154

2241

3155

2242

# Clients who has passed its expire date can still be

3156

# enabled if its last checker was successful. A Client

3157

# whose checker succeeded before we stored its state is

3158

# assumed to have successfully run all checkers during

3159

# downtime.

2243

# enabled if its last checker was successful. Clients

2244

# whose checker failed before we stored its state is

2245

# assumed to have failed all checkers during downtime.

3160

2246

if client["enabled"]:

3161

2247

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

3162

2248

if not client["last_checked_ok"]:

3163

2249

logger.warning(

3164

"disabling client {} - Client never "

3165

"performed a successful checker".format(

3166

client_name))

2250

"disabling client {0} - Client never "

2251

"performed a successfull checker"

2252

.format(client["name"]))

3167

2253

client["enabled"] = False

3168

2254

elif client["last_checker_status"] != 0:

3169

2255

logger.warning(

3170

"disabling client {} - Client last"

3171

" checker failed with error code"

3172

" {}".format(

3173

client_name,

3174

client["last_checker_status"]))

2256

"disabling client {0} - Client "

2257

"last checker failed with error code {1}"

2258

.format(client["name"],

2259

client["last_checker_status"]))

3175

2260

client["enabled"] = False

3176

2261

else:

3177

client["expires"] = (

3178

datetime.datetime.utcnow()

3179

+ client["timeout"])

3180

logger.debug("Last checker succeeded,"

3181

" keeping {} enabled".format(

3182

client_name))

2262

client["expires"] = (datetime.datetime

2263

.utcnow()

2264

+ client["timeout"])

2265

3183

2266

try:

3184

client["secret"] = pgp.decrypt(

3185

client["encrypted_secret"],

3186

client_settings[client_name]["secret"])

2267

client["secret"] = (

2268

pgp.decrypt(client["encrypted_secret"],

2269

client_settings[client_name]

2270

["secret"]))

3187

2271

except PGPError:

3188

2272

# If decryption fails, we use secret from new settings

3189

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

3190

client_name))

3191

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

3192

["secret"])

2273

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

2274

.format(client_name))

2275

client["secret"] = (

2276

client_settings[client_name]["secret"])

2277

3193

2278

3194

2279

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

3195

for client_name in (set(old_client_settings)

3196

- set(client_settings)):

2280

for client_name in set(old_client_settings) - set(client_settings):

3197

2281

del clients_data[client_name]

3198

for client_name in (set(client_settings)

3199

- set(old_client_settings)):

2282

for client_name in set(client_settings) - set(old_client_settings):

3200

2283

clients_data[client_name] = client_settings[client_name]

3201

3202

# Create all client objects

3203

for client_name, client in clients_data.items():

2284

2285

# Create clients all clients

2286

for client_name, client in clients_data.iteritems():

3204

2287

tcp_server.clients[client_name] = client_class(

3205

name = client_name,

3206

settings = client,

3207

server_settings = server_settings)

2288

name = client_name, settings = client)

3208

2289

3209

2290

if not tcp_server.clients:

3210

2291

logger.warning("No clients defined")

3211

3212

if not foreground:

3213

if pidfile is not None:

3214

pid = os.getpid()

3215

try:

3216

with pidfile:

3217

print(pid, file=pidfile)

3218

except IOError:

3219

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

3220

pidfilename, pid)

3221

del pidfile

2292

2293

if not debug:

2294

try:

2295

with pidfile:

2296

pid = os.getpid()

2297

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

2298

del pidfile

2299

except IOError:

2300

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

2301

pidfilename, pid)

2302

except NameError:

2303

# "pidfile" was never created

2304

pass

3222

2305

del pidfilename

2306

signal.signal(signal.SIGINT, signal.SIG_IGN)

3223

2307

3224

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

3225

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3226

lambda: main_loop.quit() and False)

2308

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

2309

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

3227

2310

3228

2311

if use_dbus:

3229

3230

@alternate_dbus_interfaces(

3231

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

3232

class MandosDBusService(DBusObjectWithObjectManager):

2312

class MandosDBusService(dbus.service.Object):

3233

2313

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

3234

3235

2314

def __init__(self):

3236

2315

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

3237

3238

2316

_interface = "se.recompile.Mandos"

3239

2317

3240

2318

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

3247

2325

"D-Bus signal"

3248

2326

pass

3249

2327

3250

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

3251

"true"})

3252

2328

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

3253

2329

def ClientRemoved(self, objpath, name):

3254

2330

"D-Bus signal"

3255

2331

pass

3256

2332

3257

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

3258

"true"})

3259

2333

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

3260

2334

def GetAllClients(self):

3261

2335

"D-Bus method"

3262

return dbus.Array(c.dbus_object_path for c in

3263

tcp_server.clients.values())

2336

return dbus.Array(c.dbus_object_path

2337

for c in

2338

tcp_server.clients.itervalues())

3264

2339

3265

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

3266

"true"})

3267

2340

@dbus.service.method(_interface,

3268

2341

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

3269

2342

def GetAllClientsWithProperties(self):

3270

2343

"D-Bus method"

3271

2344

return dbus.Dictionary(

3272

{ c.dbus_object_path: c.GetAll(

3273

"se.recompile.Mandos.Client")

3274

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

2345

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

2346

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

3275

2347

signature="oa{sv}")

3276

2348

3277

2349

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

3278

2350

def RemoveClient(self, object_path):

3279

2351

"D-Bus method"

3280

for c in tcp_server.clients.values():

2352

for c in tcp_server.clients.itervalues():

3281

2353

if c.dbus_object_path == object_path:

3282

2354

del tcp_server.clients[c.name]

3283

2355

c.remove_from_connection()

3284

# Don't signal the disabling

2356

# Don't signal anything except ClientRemoved

3285

2357

c.disable(quiet=True)

3286

# Emit D-Bus signal for removal

3287

self.client_removed_signal(c)

2358

# Emit D-Bus signal

2359

self.ClientRemoved(object_path, c.name)

3288

2360

return

3289

2361

raise KeyError(object_path)

3290

2362

3291

2363

del _interface

3292

3293

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3294

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

3295

def GetManagedObjects(self):

3296

"""D-Bus method"""

3297

return dbus.Dictionary(

3298

{ client.dbus_object_path:

3299

dbus.Dictionary(

3300

{ interface: client.GetAll(interface)

3301

for interface in

3302

client._get_all_interface_names()})

3303

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

3304

3305

def client_added_signal(self, client):

3306

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

3307

if use_dbus:

3308

# New standard signal

3309

self.InterfacesAdded(

3310

client.dbus_object_path,

3311

dbus.Dictionary(

3312

{ interface: client.GetAll(interface)

3313

for interface in

3314

client._get_all_interface_names()}))

3315

# Old signal

3316

self.ClientAdded(client.dbus_object_path)

3317

3318

def client_removed_signal(self, client):

3319

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

3320

if use_dbus:

3321

# New standard signal

3322

self.InterfacesRemoved(

3323

client.dbus_object_path,

3324

client._get_all_interface_names())

3325

# Old signal

3326

self.ClientRemoved(client.dbus_object_path,

3327

client.name)

3328

2364

3329

mandos_dbus_service = MandosDBusService()

2365

class MandosDBusServiceTransitional(MandosDBusService):

2366

__metaclass__ = AlternateDBusNamesMetaclass

2367

mandos_dbus_service = MandosDBusServiceTransitional()

3330

2368

3331

# Save modules to variables to exempt the modules from being

3332

# unloaded before the function registered with atexit() is run.

3333

mp = multiprocessing

3334

wn = wnull

3335

2369

def cleanup():

3336

2370

"Cleanup function; run on exit"

3337

if zeroconf:

3338

service.cleanup()

2371

service.cleanup()

3339

2372

3340

mp.active_children()

3341

wn.close()

2373

multiprocessing.active_children()

3342

2374

if not (tcp_server.clients or client_settings):

3343

2375

return

3344

2376

3347

2379

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

3348

2380

clients = {}

3349

2381

with PGPEngine() as pgp:

3350

for client in tcp_server.clients.values():

2382

for client in tcp_server.clients.itervalues():

3351

2383

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

3352

2384

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

3353

2385

key)

3355

2387

3356

2388

# A list of attributes that can not be pickled

3357

2389

# + secret.

3358

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

3359

"checker", "server_settings" }

3360

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

3361

.Object):

2390

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

2391

"checker"))

2392

for name, typ in (inspect.getmembers

2393

(dbus.service.Object)):

3362

2394

exclude.add(name)

3363

2395

3364

2396

client_dict["encrypted_secret"] = (client

3371

2403

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

3372

2404

3373

2405

try:

3374

with tempfile.NamedTemporaryFile(

3375

mode='wb',

3376

suffix=".pickle",

3377

prefix='clients-',

3378

dir=os.path.dirname(stored_state_path),

3379

delete=False) as stored_state:

3380

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

3381

protocol = 2)

3382

tempname = stored_state.name

2406

tempfd, tempname = tempfile.mkstemp(suffix=".pickle",

2407

prefix="clients-",

2408

dir=os.path.dirname

2409

(stored_state_path))

2410

with os.fdopen(tempfd, "wb") as stored_state:

2411

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

3383

2412

os.rename(tempname, stored_state_path)

3384

2413

except (IOError, OSError) as e:

2414

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

2415

.format(e))

3385

2416

if not debug:

3386

2417

try:

3387

2418

os.remove(tempname)

3388

2419

except NameError:

3389

2420

pass

3390

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

3391

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

3392

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

3393

else:

3394

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

3395

exc_info=e)

3396

raise

2421

if e.errno not in set((errno.ENOENT, errno.EACCES,

2422

errno.EEXIST)):

2423

raise e

3397

2424

3398

2425

# Delete all clients, and settings from config

3399

2426

while tcp_server.clients:

3400

2427

name, client = tcp_server.clients.popitem()

3401

2428

if use_dbus:

3402

2429

client.remove_from_connection()

3403

# Don't signal the disabling

2430

# Don't signal anything except ClientRemoved

3404

2431

client.disable(quiet=True)

3405

# Emit D-Bus signal for removal

3406

2432

if use_dbus:

3407

mandos_dbus_service.client_removed_signal(client)

2433

# Emit D-Bus signal

2434

mandos_dbus_service.ClientRemoved(client

2435

.dbus_object_path,

2436

client.name)

3408

2437

client_settings.clear()

3409

2438

3410

2439

atexit.register(cleanup)

3411

2440

3412

for client in tcp_server.clients.values():

2441

for client in tcp_server.clients.itervalues():

3413

2442

if use_dbus:

3414

# Emit D-Bus signal for adding

3415

mandos_dbus_service.client_added_signal(client)

2443

# Emit D-Bus signal

2444

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3416

2445

# Need to initiate checking of clients

3417

2446

if client.enabled:

3418

2447

client.init_checker()

3421

2450

tcp_server.server_activate()

3422

2451

3423

2452

# Find out what port we got

3424

if zeroconf:

3425

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

2453

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

3426

2454

if use_ipv6:

3427

2455

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

3428

" flowinfo %d, scope_id %d",

3429

*tcp_server.socket.getsockname())

2456

" flowinfo %d, scope_id %d"

2457

% tcp_server.socket.getsockname())

3430

2458

else: # IPv4

3431

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

3432

*tcp_server.socket.getsockname())

2459

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

2460

% tcp_server.socket.getsockname())

3433

2461

3434

2462

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

3435

2463

3436

2464

try:

3437

if zeroconf:

3438

# From the Avahi example code

3439

try:

3440

service.activate()

3441

except dbus.exceptions.DBusException as error:

3442

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

3443

cleanup()

3444

sys.exit(1)

3445

# End of Avahi example code

2465

# From the Avahi example code

2466

try:

2467

service.activate()

2468

except dbus.exceptions.DBusException as error:

2469

logger.critical("DBusException: %s", error)

2470

cleanup()

2471

sys.exit(1)

2472

# End of Avahi example code

3446

2473

3447

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

3448

lambda *args, **kwargs:

3449

(tcp_server.handle_request

3450

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

2474

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

2475

lambda *args, **kwargs:

2476

(tcp_server.handle_request

2477

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

3451

2478

3452

2479

logger.debug("Starting main loop")

3453

2480

main_loop.run()

3454

2481

except AvahiError as error:

3455

logger.critical("Avahi Error", exc_info=error)

2482

logger.critical("AvahiError: %s", error)

3456

2483

cleanup()

3457

2484

sys.exit(1)

3458

2485

except KeyboardInterrupt:

3463

2490

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

3464

2491

cleanup()

3465

2492

3466

3467

2493

if __name__ == '__main__':

3468

2494

main()