/mandos/trunk : revision 493

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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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# along with this program. If not, see

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# <http://www.gnu.org/licenses/>.

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#

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# Contact the authors at <mandos@recompile.se>.

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# Contact the authors at <mandos@fukt.bsnet.se>.

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#

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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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except ImportError:

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.7.7"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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try:

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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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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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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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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console.setFormatter(logging.Formatter('%(asctime)s %(name)s'

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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"""Exception if encryption/decryption fails"""

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pass

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class PGPEngine(object):

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

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def __init__(self):

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

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--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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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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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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for root, dirs, files in os.walk(self.tempdir,

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topdown = False):

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for filename in files:

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os.remove(os.path.join(root, filename))

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for dirname in dirs:

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os.rmdir(os.path.join(root, dirname))

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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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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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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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)

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return decrypted_plaintext

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# Pretend that we have an Avahi module

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class Avahi(object):

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

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

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

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

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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def string_array_to_txt_array(self, t):

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

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

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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

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SERVER_INVALID = 0 # avahi-common/defs.h

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SERVER_REGISTERING = 1 # avahi-common/defs.h

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SERVER_RUNNING = 2 # avahi-common/defs.h

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SERVER_COLLISION = 3 # avahi-common/defs.h

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SERVER_FAILURE = 4 # avahi-common/defs.h

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avahi = Avahi()

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version = "1.3.1"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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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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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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console = logging.StreamHandler()

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console.setFormatter(logging.Formatter('%(name)s [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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class AvahiError(Exception):

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

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self.value = value

286

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

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**kwargs)

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

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def __unicode__(self):

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return unicode(repr(self.value))

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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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pass

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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

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

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

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port: integer; what port to announce

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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.

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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def __init__(self,

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interface = avahi.IF_UNSPEC,

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name = None,

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servicetype = None,

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port = None,

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TXT = None,

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domain = "",

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host = "",

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max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

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

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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self.interface = interface

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self.name = name

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self.type = servicetype

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self, remove=True):

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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self.name = unicode(self.server.GetAlternativeServiceName(self.name))

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

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self.name)

357

if remove:

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self.remove()

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syslogger.setFormatter(logging.Formatter

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

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

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% self.name))

169

self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

362

if (error.get_dbus_name()

363

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

364

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

365

return self.rename(remove=False)

366

else:

367

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

368

self.cleanup()

369

os._exit(1)

370

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

174

self.cleanup()

175

os._exit(1)

176

self.rename_count += 1

371

177

def remove(self):

372

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

373

179

if self.entry_group_state_changed_match is not None:

375

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self.entry_group_state_changed_match = None

376

182

if self.group is not None:

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self.group.Reset()

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379

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def add(self):

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

381

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self.remove()

386

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

387

192

self.entry_group_state_changed_match = (

388

193

self.group.connect_to_signal(

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'StateChanged', self.entry_group_state_changed))

194

'StateChanged', self .entry_group_state_changed))

390

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logger.debug("Adding Zeroconf service '%s' of type '%s' ...",

391

196

self.name, self.type)

392

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self.group.AddService(

398

203

dbus.UInt16(self.port),

399

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avahi.string_array_to_txt_array(self.TXT))

400

205

self.group.Commit()

401

402

206

def entry_group_state_changed(self, state, error):

403

207

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

404

208

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

410

214

self.rename()

411

215

elif state == avahi.ENTRY_GROUP_FAILURE:

412

216

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

413

str(error))

414

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

415

217

unicode(error))

218

raise AvahiGroupError("State changed: %s"

219

% unicode(error))

416

220

def cleanup(self):

417

221

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

418

222

if self.group is not None:

419

223

try:

420

224

self.group.Free()

421

225

except (dbus.exceptions.UnknownMethodException,

422

dbus.exceptions.DBusException):

226

dbus.exceptions.DBusException) as e:

423

227

pass

424

228

self.group = None

425

229

self.remove()

426

427

230

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

428

231

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

429

232

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

430

bad_states = {

431

avahi.SERVER_INVALID: "Zeroconf server invalid",

432

avahi.SERVER_REGISTERING: None,

433

avahi.SERVER_COLLISION: "Zeroconf server name collision",

434

avahi.SERVER_FAILURE: "Zeroconf server failure",

435

}

233

bad_states = { avahi.SERVER_INVALID:

234

"Zeroconf server invalid",

235

avahi.SERVER_REGISTERING: None,

236

avahi.SERVER_COLLISION:

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"Zeroconf server name collision",

238

avahi.SERVER_FAILURE:

239

"Zeroconf server failure" }

436

240

if state in bad_states:

437

241

if bad_states[state] is not None:

438

242

if error is None:

441

245

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

442

246

self.cleanup()

443

247

elif state == avahi.SERVER_RUNNING:

444

try:

445

self.add()

446

except dbus.exceptions.DBusException as error:

447

if (error.get_dbus_name()

448

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

449

logger.info("Local Zeroconf service name"

450

" collision.")

451

return self.rename(remove=False)

452

else:

453

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

454

self.cleanup()

455

os._exit(1)

248

self.add()

456

249

else:

457

250

if error is None:

458

251

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

459

252

else:

460

253

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

461

462

254

def activate(self):

463

255

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

464

256

if self.server is None:

468

260

follow_name_owner_changes=True),

469

261

avahi.DBUS_INTERFACE_SERVER)

470

262

self.server.connect_to_signal("StateChanged",

471

self.server_state_changed)

263

self.server_state_changed)

472

264

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

473

265

474

266

475

class AvahiServiceToSyslog(AvahiService):

476

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

477

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

478

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

479

syslogger.setFormatter(logging.Formatter(

480

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

481

.format(self.name)))

482

return ret

483

484

# Pretend that we have a GnuTLS module

485

class GnuTLS(object):

486

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

487

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

488

489

_library = ctypes.cdll.LoadLibrary(

490

ctypes.util.find_library("gnutls"))

491

_need_version = b"3.3.0"

492

def __init__(self):

493

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

494

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

495

# happens.

496

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

497

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

498

.format(self._need_version))

499

500

# Unless otherwise indicated, the constants and types below are

501

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

502

503

# Constants

504

E_SUCCESS = 0

505

E_INTERRUPTED = -52

506

E_AGAIN = -28

507

CRT_OPENPGP = 2

508

CLIENT = 2

509

SHUT_RDWR = 0

510

CRD_CERTIFICATE = 1

511

E_NO_CERTIFICATE_FOUND = -49

512

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

513

514

# Types

515

class session_int(ctypes.Structure):

516

_fields_ = []

517

session_t = ctypes.POINTER(session_int)

518

class certificate_credentials_st(ctypes.Structure):

519

_fields_ = []

520

certificate_credentials_t = ctypes.POINTER(

521

certificate_credentials_st)

522

certificate_type_t = ctypes.c_int

523

class datum_t(ctypes.Structure):

524

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

525

('size', ctypes.c_uint)]

526

class openpgp_crt_int(ctypes.Structure):

527

_fields_ = []

528

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

529

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

530

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

531

credentials_type_t = ctypes.c_int

532

transport_ptr_t = ctypes.c_void_p

533

close_request_t = ctypes.c_int

534

535

# Exceptions

536

class Error(Exception):

537

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

538

# exception might be raised from within GnuTLS.__init__,

539

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

540

# global variable has happened.

541

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

542

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

543

# code is passed, convert it to a string with

544

# gnutls.strerror()

545

self.code = code

546

if message is None and code is not None:

547

message = GnuTLS.strerror(code)

548

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

549

message, *args)

550

551

class CertificateSecurityError(Error):

552

pass

553

554

# Classes

555

class Credentials(object):

556

def __init__(self):

557

self._c_object = gnutls.certificate_credentials_t()

558

gnutls.certificate_allocate_credentials(

559

ctypes.byref(self._c_object))

560

self.type = gnutls.CRD_CERTIFICATE

561

562

def __del__(self):

563

gnutls.certificate_free_credentials(self._c_object)

564

565

class ClientSession(object):

566

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

567

self._c_object = gnutls.session_t()

568

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

569

gnutls.set_default_priority(self._c_object)

570

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

571

gnutls.handshake_set_private_extensions(self._c_object,

572

True)

573

self.socket = socket

574

if credentials is None:

575

credentials = gnutls.Credentials()

576

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

577

ctypes.cast(credentials._c_object,

578

ctypes.c_void_p))

579

self.credentials = credentials

580

581

def __del__(self):

582

gnutls.deinit(self._c_object)

583

584

def handshake(self):

585

return gnutls.handshake(self._c_object)

586

587

def send(self, data):

588

data = bytes(data)

589

data_len = len(data)

590

while data_len > 0:

591

data_len -= gnutls.record_send(self._c_object,

592

data[-data_len:],

593

data_len)

594

595

def bye(self):

596

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

597

598

# Error handling functions

599

def _error_code(result):

600

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

601

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

602

if result >= 0:

603

return result

604

if result == gnutls.E_NO_CERTIFICATE_FOUND:

605

raise gnutls.CertificateSecurityError(code = result)

606

raise gnutls.Error(code = result)

607

608

def _retry_on_error(result, func, arguments):

609

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

610

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

611

while result < 0:

612

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

613

return _error_code(result)

614

result = func(*arguments)

615

return result

616

617

# Unless otherwise indicated, the function declarations below are

618

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

619

620

# Functions

621

priority_set_direct = _library.gnutls_priority_set_direct

622

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

623

ctypes.POINTER(ctypes.c_char_p)]

624

priority_set_direct.restype = _error_code

625

626

init = _library.gnutls_init

627

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

628

init.restype = _error_code

629

630

set_default_priority = _library.gnutls_set_default_priority

631

set_default_priority.argtypes = [session_t]

632

set_default_priority.restype = _error_code

633

634

record_send = _library.gnutls_record_send

635

record_send.argtypes = [session_t, ctypes.c_void_p,

636

ctypes.c_size_t]

637

record_send.restype = ctypes.c_ssize_t

638

record_send.errcheck = _retry_on_error

639

640

certificate_allocate_credentials = (

641

_library.gnutls_certificate_allocate_credentials)

642

certificate_allocate_credentials.argtypes = [

643

ctypes.POINTER(certificate_credentials_t)]

644

certificate_allocate_credentials.restype = _error_code

645

646

certificate_free_credentials = (

647

_library.gnutls_certificate_free_credentials)

648

certificate_free_credentials.argtypes = [certificate_credentials_t]

649

certificate_free_credentials.restype = None

650

651

handshake_set_private_extensions = (

652

_library.gnutls_handshake_set_private_extensions)

653

handshake_set_private_extensions.argtypes = [session_t,

654

ctypes.c_int]

655

handshake_set_private_extensions.restype = None

656

657

credentials_set = _library.gnutls_credentials_set

658

credentials_set.argtypes = [session_t, credentials_type_t,

659

ctypes.c_void_p]

660

credentials_set.restype = _error_code

661

662

strerror = _library.gnutls_strerror

663

strerror.argtypes = [ctypes.c_int]

664

strerror.restype = ctypes.c_char_p

665

666

certificate_type_get = _library.gnutls_certificate_type_get

667

certificate_type_get.argtypes = [session_t]

668

certificate_type_get.restype = _error_code

669

670

certificate_get_peers = _library.gnutls_certificate_get_peers

671

certificate_get_peers.argtypes = [session_t,

672

ctypes.POINTER(ctypes.c_uint)]

673

certificate_get_peers.restype = ctypes.POINTER(datum_t)

674

675

global_set_log_level = _library.gnutls_global_set_log_level

676

global_set_log_level.argtypes = [ctypes.c_int]

677

global_set_log_level.restype = None

678

679

global_set_log_function = _library.gnutls_global_set_log_function

680

global_set_log_function.argtypes = [log_func]

681

global_set_log_function.restype = None

682

683

deinit = _library.gnutls_deinit

684

deinit.argtypes = [session_t]

685

deinit.restype = None

686

687

handshake = _library.gnutls_handshake

688

handshake.argtypes = [session_t]

689

handshake.restype = _error_code

690

handshake.errcheck = _retry_on_error

691

692

transport_set_ptr = _library.gnutls_transport_set_ptr

693

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

694

transport_set_ptr.restype = None

695

696

bye = _library.gnutls_bye

697

bye.argtypes = [session_t, close_request_t]

698

bye.restype = _error_code

699

bye.errcheck = _retry_on_error

700

701

check_version = _library.gnutls_check_version

702

check_version.argtypes = [ctypes.c_char_p]

703

check_version.restype = ctypes.c_char_p

704

705

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

706

707

openpgp_crt_init = _library.gnutls_openpgp_crt_init

708

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

709

openpgp_crt_init.restype = _error_code

710

711

openpgp_crt_import = _library.gnutls_openpgp_crt_import

712

openpgp_crt_import.argtypes = [openpgp_crt_t,

713

ctypes.POINTER(datum_t),

714

openpgp_crt_fmt_t]

715

openpgp_crt_import.restype = _error_code

716

717

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

718

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

719

ctypes.POINTER(ctypes.c_uint)]

720

openpgp_crt_verify_self.restype = _error_code

721

722

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

723

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

724

openpgp_crt_deinit.restype = None

725

726

openpgp_crt_get_fingerprint = (

727

_library.gnutls_openpgp_crt_get_fingerprint)

728

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

729

ctypes.c_void_p,

730

ctypes.POINTER(

731

ctypes.c_size_t)]

732

openpgp_crt_get_fingerprint.restype = _error_code

733

734

# Remove non-public functions

735

del _error_code, _retry_on_error

736

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

737

gnutls = GnuTLS()

738

739

def call_pipe(connection, # : multiprocessing.Connection

740

func, *args, **kwargs):

741

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

742

743

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

744

return value on the provided multiprocessing.Connection.

745

"""

746

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

747

connection.close()

748

749

267

class Client(object):

750

268

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

751

269

752

270

Attributes:

753

approved: bool(); 'None' if not yet approved/disapproved

271

_approved: bool(); 'None' if not yet approved/disapproved

754

272

approval_delay: datetime.timedelta(); Time to wait for approval

755

273

approval_duration: datetime.timedelta(); Duration of one approval

756

274

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

757

275

to see if the client lives.

758

276

'None' if no process is running.

759

checker_callback_tag: a GLib event source tag, or None

277

checker_callback_tag: a gobject event source tag, or None

760

278

checker_command: string; External command which is run to check

761

279

if client lives. %() expansions are done at

762

280

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

763

281

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

764

checker_initiator_tag: a GLib event source tag, or None

282

checker_initiator_tag: a gobject event source tag, or None

765

283

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

766

client_structure: Object describing what attributes a client has

767

and is used for storing the client at exit

768

284

current_checker_command: string; current running checker_command

769

disable_initiator_tag: a GLib event source tag, or None

285

disable_hook: If set, called by disable() as disable_hook(self)

286

disable_initiator_tag: a gobject event source tag, or None

770

287

enabled: bool()

771

288

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

772

289

uniquely identify the client

774

291

interval: datetime.timedelta(); How often to start a new checker

775

292

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

776

293

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

777

last_checker_status: integer between 0 and 255 reflecting exit

778

status of last checker. -1 reflects crashed

779

checker, -2 means no checker completed yet.

780

last_checker_signal: The signal which killed the last checker, if

781

last_checker_status is -1

782

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

294

last_enabled: datetime.datetime(); (UTC)

783

295

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

784

296

D-Bus identifiers

785

297

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

786

298

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

787

299

until this client is disabled

788

extended_timeout: extra long timeout when secret has been sent

789

300

runtime_expansions: Allowed attributes for runtime expansion.

790

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

791

disabled, or None

792

server_settings: The server_settings dict from main()

793

301

"""

794

302

795

303

runtime_expansions = ("approval_delay", "approval_duration",

796

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

797

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

798

"last_approval_request", "last_checked_ok",

304

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

305

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

799

306

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

800

client_defaults = {

801

"timeout": "PT5M",

802

"extended_timeout": "PT15M",

803

"interval": "PT2M",

804

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

805

"host": "",

806

"approval_delay": "PT0S",

807

"approval_duration": "PT1S",

808

"approved_by_default": "True",

809

"enabled": "True",

810

}

811

307

812

308

@staticmethod

813

def config_parser(config):

814

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

815

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

816

with exceptions for any special settings as defined above.

817

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

818

value given the same arguments.

819

"""

820

settings = {}

821

for client_name in config.sections():

822

section = dict(config.items(client_name))

823

client = settings[client_name] = {}

824

825

client["host"] = section["host"]

826

# Reformat values from string types to Python types

827

client["approved_by_default"] = config.getboolean(

828

client_name, "approved_by_default")

829

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

830

"enabled")

831

832

# Uppercase and remove spaces from fingerprint for later

833

# comparison purposes with return value from the

834

# fingerprint() function

835

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

836

.replace(" ", ""))

837

if "secret" in section:

838

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

839

.encode("utf-8"),

840

"base64")

841

elif "secfile" in section:

842

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

843

(section["secfile"])),

844

"rb") as secfile:

845

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

846

else:

847

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

848

.format(section))

849

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

850

client["extended_timeout"] = string_to_delta(

851

section["extended_timeout"])

852

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

853

client["approval_delay"] = string_to_delta(

854

section["approval_delay"])

855

client["approval_duration"] = string_to_delta(

856

section["approval_duration"])

857

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

858

client["last_approval_request"] = None

859

client["last_checked_ok"] = None

860

client["last_checker_status"] = -2

861

862

return settings

863

864

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

309

def _timedelta_to_milliseconds(td):

310

"Convert a datetime.timedelta() to milliseconds"

311

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

312

+ (td.seconds * 1000)

313

+ (td.microseconds // 1000))

314

315

def timeout_milliseconds(self):

316

"Return the 'timeout' attribute in milliseconds"

317

return self._timedelta_to_milliseconds(self.timeout)

318

319

def interval_milliseconds(self):

320

"Return the 'interval' attribute in milliseconds"

321

return self._timedelta_to_milliseconds(self.interval)

322

323

def approval_delay_milliseconds(self):

324

return self._timedelta_to_milliseconds(self.approval_delay)

325

326

def __init__(self, name = None, disable_hook=None, config=None):

327

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

328

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

329

attribute."""

865

330

self.name = name

866

if server_settings is None:

867

server_settings = {}

868

self.server_settings = server_settings

869

# adding all client settings

870

for setting, value in settings.items():

871

setattr(self, setting, value)

872

873

if self.enabled:

874

if not hasattr(self, "last_enabled"):

875

self.last_enabled = datetime.datetime.utcnow()

876

if not hasattr(self, "expires"):

877

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

878

+ self.timeout)

879

else:

880

self.last_enabled = None

881

self.expires = None

882

331

if config is None:

332

config = {}

883

333

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

334

# Uppercase and remove spaces from fingerprint for later

335

# comparison purposes with return value from the fingerprint()

336

# function

337

self.fingerprint = (config["fingerprint"].upper()

338

.replace(" ", ""))

884

339

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

885

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

886

datetime.datetime.utcnow())

887

888

# attributes specific for this server instance

340

if "secret" in config:

341

self.secret = config["secret"].decode("base64")

342

elif "secfile" in config:

343

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

344

(config["secfile"])),

345

"rb") as secfile:

346

self.secret = secfile.read()

347

else:

348

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

349

% self.name)

350

self.host = config.get("host", "")

351

self.created = datetime.datetime.utcnow()

352

self.enabled = False

353

self.last_approval_request = None

354

self.last_enabled = None

355

self.last_checked_ok = None

356

self.timeout = string_to_delta(config["timeout"])

357

self.interval = string_to_delta(config["interval"])

358

self.disable_hook = disable_hook

889

359

self.checker = None

890

360

self.checker_initiator_tag = None

891

361

self.disable_initiator_tag = None

892

362

self.checker_callback_tag = None

363

self.checker_command = config["checker"]

893

364

self.current_checker_command = None

894

self.approved = None

365

self.last_connect = None

366

self._approved = None

367

self.approved_by_default = config.get("approved_by_default",

368

True)

895

369

self.approvals_pending = 0

896

self.changedstate = multiprocessing_manager.Condition(

897

multiprocessing_manager.Lock())

898

self.client_structure = [attr

899

for attr in self.__dict__.keys()

900

if not attr.startswith("_")]

901

self.client_structure.append("client_structure")

902

903

for name, t in inspect.getmembers(

904

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

905

if not name.startswith("_"):

906

self.client_structure.append(name)

370

self.approval_delay = string_to_delta(

371

config["approval_delay"])

372

self.approval_duration = string_to_delta(

373

config["approval_duration"])

374

self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())

907

375

908

# Send notice to process children that client state has changed

909

376

def send_changedstate(self):

910

with self.changedstate:

911

self.changedstate.notify_all()

912

377

self.changedstate.acquire()

378

self.changedstate.notify_all()

379

self.changedstate.release()

380

913

381

def enable(self):

914

382

"""Start this client's checker and timeout hooks"""

915

383

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

916

384

# Already enabled

917

385

return

918

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

919

self.enabled = True

386

self.send_changedstate()

920

387

self.last_enabled = datetime.datetime.utcnow()

921

self.init_checker()

922

self.send_changedstate()

388

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

389

# and every interval from then on.

390

self.checker_initiator_tag = (gobject.timeout_add

391

(self.interval_milliseconds(),

392

self.start_checker))

393

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

394

self.disable_initiator_tag = (gobject.timeout_add

395

(self.timeout_milliseconds(),

396

self.disable))

397

self.enabled = True

398

# Also start a new checker *right now*.

399

self.start_checker()

923

400

924

401

def disable(self, quiet=True):

925

402

"""Disable this client."""

926

403

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

927

404

return False

928

405

if not quiet:

406

self.send_changedstate()

407

if not quiet:

929

408

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

930

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

931

GLib.source_remove(self.disable_initiator_tag)

409

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

410

gobject.source_remove(self.disable_initiator_tag)

932

411

self.disable_initiator_tag = None

933

self.expires = None

934

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

935

GLib.source_remove(self.checker_initiator_tag)

412

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

413

gobject.source_remove(self.checker_initiator_tag)

936

414

self.checker_initiator_tag = None

937

415

self.stop_checker()

416

if self.disable_hook:

417

self.disable_hook(self)

938

418

self.enabled = False

939

if not quiet:

940

self.send_changedstate()

941

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

419

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

942

420

return False

943

421

944

422

def __del__(self):

423

self.disable_hook = None

945

424

self.disable()

946

425

947

def init_checker(self):

948

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

949

# and every interval from then on.

950

if self.checker_initiator_tag is not None:

951

GLib.source_remove(self.checker_initiator_tag)

952

self.checker_initiator_tag = GLib.timeout_add(

953

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

954

self.start_checker)

955

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

956

if self.disable_initiator_tag is not None:

957

GLib.source_remove(self.disable_initiator_tag)

958

self.disable_initiator_tag = GLib.timeout_add(

959

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

960

# Also start a new checker *right now*.

961

self.start_checker()

962

963

def checker_callback(self, source, condition, connection,

964

command):

426

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

965

427

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

966

428

self.checker_callback_tag = None

967

429

self.checker = None

968

# Read return code from connection (see call_pipe)

969

returncode = connection.recv()

970

connection.close()

971

972

if returncode >= 0:

973

self.last_checker_status = returncode

974

self.last_checker_signal = None

975

if self.last_checker_status == 0:

430

if os.WIFEXITED(condition):

431

exitstatus = os.WEXITSTATUS(condition)

432

if exitstatus == 0:

976

433

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

977

434

vars(self))

978

435

self.checked_ok()

979

436

else:

980

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

437

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

438

vars(self))

981

439

else:

982

self.last_checker_status = -1

983

self.last_checker_signal = -returncode

984

440

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

985

441

vars(self))

986

return False

987

442

988

443

def checked_ok(self):

989

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

444

"""Bump up the timeout for this client.

445

446

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

447

alive and well.

448

"""

990

449

self.last_checked_ok = datetime.datetime.utcnow()

991

self.last_checker_status = 0

992

self.last_checker_signal = None

993

self.bump_timeout()

994

995

def bump_timeout(self, timeout=None):

996

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

997

if timeout is None:

998

timeout = self.timeout

999

if self.disable_initiator_tag is not None:

1000

GLib.source_remove(self.disable_initiator_tag)

1001

self.disable_initiator_tag = None

1002

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

1003

self.disable_initiator_tag = GLib.timeout_add(

1004

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

1005

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

450

gobject.source_remove(self.disable_initiator_tag)

451

self.disable_initiator_tag = (gobject.timeout_add

452

(self.timeout_milliseconds(),

453

self.disable))

1006

454

1007

455

def need_approval(self):

1008

456

self.last_approval_request = datetime.datetime.utcnow()

1013

461

If a checker already exists, leave it running and do

1014

462

nothing."""

1015

463

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

1016

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

1017

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

1018

# would inevitably timeout, since no checker would get a

1019

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

464

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

465

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

466

# client would inevitably timeout, since no checker would get

467

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

1020

468

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

1021

469

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

1022

470

# should be.

1023

471

1024

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

1025

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

1026

self.checker.join()

1027

self.checker = None

472

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

473

try:

474

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

475

except (AttributeError, OSError) as error:

476

if (isinstance(error, OSError)

477

and error.errno != errno.ECHILD):

478

raise error

479

else:

480

if pid:

481

logger.warning("Checker was a zombie")

482

gobject.source_remove(self.checker_callback_tag)

483

self.checker_callback(pid, status,

484

self.current_checker_command)

1028

485

# Start a new checker if needed

1029

486

if self.checker is None:

1030

# Escape attributes for the shell

1031

escaped_attrs = {

1032

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

1033

for attr in self.runtime_expansions }

1034

487

try:

1035

command = self.checker_command % escaped_attrs

1036

except TypeError as error:

1037

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

1038

self.checker_command,

1039

exc_info=error)

1040

return True # Try again later

488

# In case checker_command has exactly one % operator

489

command = self.checker_command % self.host

490

except TypeError:

491

# Escape attributes for the shell

492

escaped_attrs = dict(

493

(attr,

494

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

495

errors=

496

'replace')))

497

for attr in

498

self.runtime_expansions)

499

500

try:

501

command = self.checker_command % escaped_attrs

502

except TypeError as error:

503

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

504

' %s', self.checker_command, error)

505

return True # Try again later

1041

506

self.current_checker_command = command

1042

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

1043

self.name)

1044

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

1045

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

1046

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

1047

# always replaced by /dev/null.)

1048

# The exception is when not debugging but nevertheless

1049

# running in the foreground; use the previously

1050

# created wnull.

1051

popen_args = { "close_fds": True,

1052

"shell": True,

1053

"cwd": "/" }

1054

if (not self.server_settings["debug"]

1055

and self.server_settings["foreground"]):

1056

popen_args.update({"stdout": wnull,

1057

"stderr": wnull })

1058

pipe = multiprocessing.Pipe(duplex = False)

1059

self.checker = multiprocessing.Process(

1060

target = call_pipe,

1061

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

1062

kwargs = popen_args)

1063

self.checker.start()

1064

self.checker_callback_tag = GLib.io_add_watch(

1065

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

1066

self.checker_callback, pipe[0], command)

1067

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

507

try:

508

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

509

command, self.name)

510

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

511

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

512

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

513

# always replaced by /dev/null.)

514

self.checker = subprocess.Popen(command,

515

close_fds=True,

516

shell=True, cwd="/")

517

self.checker_callback_tag = (gobject.child_watch_add

518

(self.checker.pid,

519

self.checker_callback,

520

data=command))

521

# The checker may have completed before the gobject

522

# watch was added. Check for this.

523

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

524

if pid:

525

gobject.source_remove(self.checker_callback_tag)

526

self.checker_callback(pid, status, command)

527

except OSError as error:

528

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

529

error)

530

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

1068

531

return True

1069

532

1070

533

def stop_checker(self):

1071

534

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

1072

535

if self.checker_callback_tag:

1073

GLib.source_remove(self.checker_callback_tag)

536

gobject.source_remove(self.checker_callback_tag)

1074

537

self.checker_callback_tag = None

1075

538

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

1076

539

return

1077

540

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

1078

self.checker.terminate()

541

try:

542

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

543

#time.sleep(0.5)

544

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

545

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

546

except OSError as error:

547

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

548

raise

1079

549

self.checker = None

1080

550

1081

1082

def dbus_service_property(dbus_interface,

1083

signature="v",

1084

access="readwrite",

1085

byte_arrays=False):

551

def dbus_service_property(dbus_interface, signature="v",

552

access="readwrite", byte_arrays=False):

1086

553

"""Decorators for marking methods of a DBusObjectWithProperties to

1087

554

become properties on the D-Bus.

1088

555

1097

564

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

1098

565

if byte_arrays and signature != "ay":

1099

566

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

1100

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

1101

567

" signature %r" % signature)

1102

568

def decorator(func):

1103

569

func._dbus_is_property = True

1104

570

func._dbus_interface = dbus_interface

1109

575

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

1110

576

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1111

577

return func

1112

1113

return decorator

1114

1115

1116

def dbus_interface_annotations(dbus_interface):

1117

"""Decorator for marking functions returning interface annotations

1118

1119

Usage:

1120

1121

@dbus_interface_annotations("org.example.Interface")

1122

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

1123

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

1124

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

1125

"false"}

1126

"""

1127

1128

def decorator(func):

1129

func._dbus_is_interface = True

1130

func._dbus_interface = dbus_interface

1131

func._dbus_name = dbus_interface

1132

return func

1133

1134

return decorator

1135

1136

1137

def dbus_annotations(annotations):

1138

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

1139

Usage:

1140

1141

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

1142

"org.freedesktop.DBus.Property."

1143

"EmitsChangedSignal": "false"})

1144

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

1145

access="r")

1146

def Property_dbus_property(self):

1147

return dbus.Boolean(False)

1148

1149

See also the DBusObjectWithAnnotations class.

1150

"""

1151

1152

def decorator(func):

1153

func._dbus_annotations = annotations

1154

return func

1155

1156

578

return decorator

1157

579

1158

580

1159

581

class DBusPropertyException(dbus.exceptions.DBusException):

1160

582

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

1161

583

"""

1162

pass

584

def __unicode__(self):

585

return unicode(str(self))

1163

586

1164

587

1165

588

class DBusPropertyAccessException(DBusPropertyException):

1174

597

pass

1175

598

1176

599

1177

class DBusObjectWithAnnotations(dbus.service.Object):

1178

"""A D-Bus object with annotations.

1179

1180

Classes inheriting from this can use the dbus_annotations

1181

decorator to add annotations to methods or signals.

1182

"""

1183

1184

@staticmethod

1185

def _is_dbus_thing(thing):

1186

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

1187

1188

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

1189

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

1190

"""

1191

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

1192

False)

1193

1194

def _get_all_dbus_things(self, thing):

1195

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

1196

"""

1197

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

1198

athing.__get__(self))

1199

for cls in self.__class__.__mro__

1200

for name, athing in

1201

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

1202

1203

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1204

out_signature = "s",

1205

path_keyword = 'object_path',

1206

connection_keyword = 'connection')

1207

def Introspect(self, object_path, connection):

1208

"""Overloading of standard D-Bus method.

1209

1210

Inserts annotation tags on methods and signals.

1211

"""

1212

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

1213

connection)

1214

try:

1215

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

1216

1217

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

1218

# Add annotation tags

1219

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

1220

for tag in if_tag.getElementsByTagName(typ):

1221

annots = dict()

1222

for name, prop in (self.

1223

_get_all_dbus_things(typ)):

1224

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

1225

and prop._dbus_interface

1226

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

1227

annots.update(getattr(

1228

prop, "_dbus_annotations", {}))

1229

for name, value in annots.items():

1230

ann_tag = document.createElement(

1231

"annotation")

1232

ann_tag.setAttribute("name", name)

1233

ann_tag.setAttribute("value", value)

1234

tag.appendChild(ann_tag)

1235

# Add interface annotation tags

1236

for annotation, value in dict(

1237

itertools.chain.from_iterable(

1238

annotations().items()

1239

for name, annotations

1240

in self._get_all_dbus_things("interface")

1241

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

1242

)).items():

1243

ann_tag = document.createElement("annotation")

1244

ann_tag.setAttribute("name", annotation)

1245

ann_tag.setAttribute("value", value)

1246

if_tag.appendChild(ann_tag)

1247

# Fix argument name for the Introspect method itself

1248

if (if_tag.getAttribute("name")

1249

== dbus.INTROSPECTABLE_IFACE):

1250

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

1251

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

1252

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

1253

if (arg.getAttribute("direction")

1254

== "out"):

1255

arg.setAttribute("name",

1256

"xml_data")

1257

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

1258

document.unlink()

1259

except (AttributeError, xml.dom.DOMException,

1260

xml.parsers.expat.ExpatError) as error:

1261

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

1262

exc_info=error)

1263

return xmlstring

1264

1265

1266

class DBusObjectWithProperties(DBusObjectWithAnnotations):

600

class DBusObjectWithProperties(dbus.service.Object):

1267

601

"""A D-Bus object with properties.

1268

602

1269

603

Classes inheriting from this can use the dbus_service_property

1270

604

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

1271

605

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

1272

606

"""

1273

607

608

@staticmethod

609

def _is_dbus_property(obj):

610

return getattr(obj, "_dbus_is_property", False)

611

612

def _get_all_dbus_properties(self):

613

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

614

"""

615

return ((prop._dbus_name, prop)

616

for name, prop in

617

inspect.getmembers(self, self._is_dbus_property))

618

1274

619

def _get_dbus_property(self, interface_name, property_name):

1275

620

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

1276

621

property with the specified name and interface.

1277

622

"""

1278

for cls in self.__class__.__mro__:

1279

for name, value in inspect.getmembers(

1280

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

1281

if (value._dbus_name == property_name

1282

and value._dbus_interface == interface_name):

1283

return value.__get__(self)

1284

623

for name in (property_name,

624

property_name + "_dbus_property"):

625

prop = getattr(self, name, None)

626

if (prop is None

627

or not self._is_dbus_property(prop)

628

or prop._dbus_name != property_name

629

or (interface_name and prop._dbus_interface

630

and interface_name != prop._dbus_interface)):

631

continue

632

return prop

1285

633

# No such property

1286

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

1287

self.dbus_object_path, interface_name, property_name))

1288

1289

@classmethod

1290

def _get_all_interface_names(cls):

1291

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

1292

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

1293

"_dbus_interface", None)

1294

for x in (inspect.getmro(cls))

1295

for attr in dir(x))

1296

if name is not None)

1297

1298

@dbus.service.method(dbus.PROPERTIES_IFACE,

1299

in_signature="ss",

634

raise DBusPropertyNotFound(self.dbus_object_path + ":"

635

+ interface_name + "."

636

+ property_name)

637

638

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

1300

639

out_signature="v")

1301

640

def Get(self, interface_name, property_name):

1302

641

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

1320

659

# The byte_arrays option is not supported yet on

1321

660

# signatures other than "ay".

1322

661

if prop._dbus_signature != "ay":

1323

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

1324

"'ay' signature {!r}"

1325

.format(prop._dbus_signature))

1326

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

1327

for byte in value))

662

raise ValueError

663

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

664

for byte in value))

1328

665

prop(value)

1329

666

1330

@dbus.service.method(dbus.PROPERTIES_IFACE,

1331

in_signature="s",

667

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

1332

668

out_signature="a{sv}")

1333

669

def GetAll(self, interface_name):

1334

670

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

1335

671

standard.

1336

672

1337

673

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

1338

674

"""

1339

properties = {}

1340

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

675

all = {}

676

for name, prop in self._get_all_dbus_properties():

1341

677

if (interface_name

1342

678

and interface_name != prop._dbus_interface):

1343

679

# Interface non-empty but did not match

1347

683

continue

1348

684

value = prop()

1349

685

if not hasattr(value, "variant_level"):

1350

properties[name] = value

686

all[name] = value

1351

687

continue

1352

properties[name] = type(value)(

1353

value, variant_level = value.variant_level + 1)

1354

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

1355

1356

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

1357

def PropertiesChanged(self, interface_name, changed_properties,

1358

invalidated_properties):

1359

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

1360

standard.

1361

"""

1362

pass

688

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

689

value.variant_level+1)

690

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

1363

691

1364

692

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1365

693

out_signature="s",

1366

694

path_keyword='object_path',

1367

695

connection_keyword='connection')

1368

696

def Introspect(self, object_path, connection):

1369

"""Overloading of standard D-Bus method.

1370

1371

Inserts property tags and interface annotation tags.

697

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

1372

698

"""

1373

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1374

object_path,

1375

connection)

699

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

700

connection)

1376

701

try:

1377

702

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

1378

1379

703

def make_tag(document, name, prop):

1380

704

e = document.createElement("property")

1381

705

e.setAttribute("name", name)

1382

706

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

1383

707

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

1384

708

return e

1385

1386

709

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

1387

# Add property tags

1388

710

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

1389

711

for name, prop

1390

in self._get_all_dbus_things("property")

712

in self._get_all_dbus_properties()

1391

713

if prop._dbus_interface

1392

714

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

1393

715

if_tag.appendChild(tag)

1394

# Add annotation tags for properties

1395

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

1396

annots = dict()

1397

for name, prop in self._get_all_dbus_things(

1398

"property"):

1399

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

1400

and prop._dbus_interface

1401

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

1402

annots.update(getattr(

1403

prop, "_dbus_annotations", {}))

1404

for name, value in annots.items():

1405

ann_tag = document.createElement(

1406

"annotation")

1407

ann_tag.setAttribute("name", name)

1408

ann_tag.setAttribute("value", value)

1409

tag.appendChild(ann_tag)

1410

716

# Add the names to the return values for the

1411

717

# "org.freedesktop.DBus.Properties" methods

1412

718

if (if_tag.getAttribute("name")

1427

733

except (AttributeError, xml.dom.DOMException,

1428

734

xml.parsers.expat.ExpatError) as error:

1429

735

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

1430

exc_info=error)

1431

return xmlstring

1432

1433

try:

1434

dbus.OBJECT_MANAGER_IFACE

1435

except AttributeError:

1436

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

1437

1438

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1439

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

1440

1441

Classes inheriting from this exposes the standard

1442

GetManagedObjects call and the InterfacesAdded and

1443

InterfacesRemoved signals on the standard

1444

"org.freedesktop.DBus.ObjectManager" interface.

1445

1446

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

1447

manually.

1448

"""

1449

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1450

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

1451

def GetManagedObjects(self):

1452

"""This function must be overridden"""

1453

raise NotImplementedError()

1454

1455

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1456

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

1457

def InterfacesAdded(self, object_path, interfaces_and_properties):

1458

pass

1459

1460

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

1461

def InterfacesRemoved(self, object_path, interfaces):

1462

pass

1463

1464

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1465

out_signature = "s",

1466

path_keyword = 'object_path',

1467

connection_keyword = 'connection')

1468

def Introspect(self, object_path, connection):

1469

"""Overloading of standard D-Bus method.

1470

1471

Override return argument name of GetManagedObjects to be

1472

"objpath_interfaces_and_properties"

1473

"""

1474

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1475

object_path,

1476

connection)

1477

try:

1478

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

1479

1480

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

1481

# Fix argument name for the GetManagedObjects method

1482

if (if_tag.getAttribute("name")

1483

== dbus.OBJECT_MANAGER_IFACE):

1484

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

1485

if (cn.getAttribute("name")

1486

== "GetManagedObjects"):

1487

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

1488

if (arg.getAttribute("direction")

1489

== "out"):

1490

arg.setAttribute(

1491

"name",

1492

"objpath_interfaces"

1493

"_and_properties")

1494

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

1495

document.unlink()

1496

except (AttributeError, xml.dom.DOMException,

1497

xml.parsers.expat.ExpatError) as error:

1498

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

1499

exc_info = error)

1500

return xmlstring

1501

1502

def datetime_to_dbus(dt, variant_level=0):

1503

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

1504

if dt is None:

1505

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

1506

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

1507

1508

1509

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1510

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

1511

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

1512

interface names according to the "alt_interface_names" mapping.

1513

Usage:

1514

1515

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

1516

"net.example.AlternateInterface"})

1517

class SampleDBusObject(dbus.service.Object):

1518

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

1519

def SampleDBusMethod():

1520

pass

1521

1522

The above "SampleDBusMethod" on "SampleDBusObject" will be

1523

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

1524

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

1525

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

1526

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

1527

1528

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

1529

(from DBusObjectWithProperties) and interfaces (from the

1530

dbus_interface_annotations decorator).

1531

"""

1532

1533

def wrapper(cls):

1534

for orig_interface_name, alt_interface_name in (

1535

alt_interface_names.items()):

1536

attr = {}

1537

interface_names = set()

1538

# Go though all attributes of the class

1539

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

1540

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

1541

# with the wrong interface name

1542

if (not hasattr(attribute, "_dbus_interface")

1543

or not attribute._dbus_interface.startswith(

1544

orig_interface_name)):

1545

continue

1546

# Create an alternate D-Bus interface name based on

1547

# the current name

1548

alt_interface = attribute._dbus_interface.replace(

1549

orig_interface_name, alt_interface_name)

1550

interface_names.add(alt_interface)

1551

# Is this a D-Bus signal?

1552

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

1553

# Extract the original non-method undecorated

1554

# function by black magic

1555

if sys.version_info.major == 2:

1556

nonmethod_func = (dict(

1557

zip(attribute.func_code.co_freevars,

1558

attribute.__closure__))

1559

["func"].cell_contents)

1560

else:

1561

nonmethod_func = (dict(

1562

zip(attribute.__code__.co_freevars,

1563

attribute.__closure__))

1564

["func"].cell_contents)

1565

# Create a new, but exactly alike, function

1566

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

1567

# with the alternate D-Bus interface name

1568

new_function = copy_function(nonmethod_func)

1569

new_function = (dbus.service.signal(

1570

alt_interface,

1571

attribute._dbus_signature)(new_function))

1572

# Copy annotations, if any

1573

try:

1574

new_function._dbus_annotations = dict(

1575

attribute._dbus_annotations)

1576

except AttributeError:

1577

pass

1578

# Define a creator of a function to call both the

1579

# original and alternate functions, so both the

1580

# original and alternate signals gets sent when

1581

# the function is called

1582

def fixscope(func1, func2):

1583

"""This function is a scope container to pass

1584

func1 and func2 to the "call_both" function

1585

outside of its arguments"""

1586

1587

@functools.wraps(func2)

1588

def call_both(*args, **kwargs):

1589

"""This function will emit two D-Bus

1590

signals by calling func1 and func2"""

1591

func1(*args, **kwargs)

1592

func2(*args, **kwargs)

1593

# Make wrapper function look like a D-Bus signal

1594

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

1595

if name.startswith("_dbus_"):

1596

setattr(call_both, name, attr)

1597

1598

return call_both

1599

# Create the "call_both" function and add it to

1600

# the class

1601

attr[attrname] = fixscope(attribute, new_function)

1602

# Is this a D-Bus method?

1603

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

1604

# Create a new, but exactly alike, function

1605

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

1606

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

1607

# to the class.

1608

attr[attrname] = (

1609

dbus.service.method(

1610

alt_interface,

1611

attribute._dbus_in_signature,

1612

attribute._dbus_out_signature)

1613

(copy_function(attribute)))

1614

# Copy annotations, if any

1615

try:

1616

attr[attrname]._dbus_annotations = dict(

1617

attribute._dbus_annotations)

1618

except AttributeError:

1619

pass

1620

# Is this a D-Bus property?

1621

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

1622

# Create a new, but exactly alike, function

1623

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

1624

# property with the alternate D-Bus interface

1625

# name. Add it to the class.

1626

attr[attrname] = (dbus_service_property(

1627

alt_interface, attribute._dbus_signature,

1628

attribute._dbus_access,

1629

attribute._dbus_get_args_options

1630

["byte_arrays"])

1631

(copy_function(attribute)))

1632

# Copy annotations, if any

1633

try:

1634

attr[attrname]._dbus_annotations = dict(

1635

attribute._dbus_annotations)

1636

except AttributeError:

1637

pass

1638

# Is this a D-Bus interface?

1639

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

1640

# Create a new, but exactly alike, function

1641

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

1642

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

1643

# to the class.

1644

attr[attrname] = (

1645

dbus_interface_annotations(alt_interface)

1646

(copy_function(attribute)))

1647

if deprecate:

1648

# Deprecate all alternate interfaces

1649

iname="_AlternateDBusNames_interface_annotation{}"

1650

for interface_name in interface_names:

1651

1652

@dbus_interface_annotations(interface_name)

1653

def func(self):

1654

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

1655

"true" }

1656

# Find an unused name

1657

for aname in (iname.format(i)

1658

for i in itertools.count()):

1659

if aname not in attr:

1660

attr[aname] = func

1661

break

1662

if interface_names:

1663

# Replace the class with a new subclass of it with

1664

# methods, signals, etc. as created above.

1665

if sys.version_info.major == 2:

1666

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

1667

(cls, ), attr)

1668

else:

1669

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

1670

(cls, ), attr)

1671

return cls

1672

1673

return wrapper

1674

1675

1676

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

1677

"se.bsnet.fukt.Mandos"})

736

error)

737

return xmlstring

738

739

1678

740

class ClientDBus(Client, DBusObjectWithProperties):

1679

741

"""A Client class using D-Bus

1680

742

1684

746

"""

1685

747

1686

748

runtime_expansions = (Client.runtime_expansions

1687

+ ("dbus_object_path", ))

1688

1689

_interface = "se.recompile.Mandos.Client"

749

+ ("dbus_object_path",))

1690

750

1691

751

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

1692

752

1693

753

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

754

self._approvals_pending = 0

1694

755

self.bus = bus

1695

756

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

1696

757

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

1697

758

# the D-Bus

1698

client_object_name = str(self.name).translate(

759

client_object_name = unicode(self.name).translate(

1699

760

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

1700

761

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

1701

self.dbus_object_path = dbus.ObjectPath(

1702

"/clients/" + client_object_name)

762

self.dbus_object_path = (dbus.ObjectPath

763

("/clients/" + client_object_name))

1703

764

DBusObjectWithProperties.__init__(self, self.bus,

1704

765

self.dbus_object_path)

1705

1706

def notifychangeproperty(transform_func, dbus_name,

1707

type_func=lambda x: x,

1708

variant_level=1,

1709

invalidate_only=False,

1710

_interface=_interface):

1711

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

1712

its changes to DBus.

1713

1714

transform_fun: Function that takes a value and a variant_level

1715

and transforms it to a D-Bus type.

1716

dbus_name: D-Bus name of the variable

1717

type_func: Function that transform the value before sending it

1718

to the D-Bus. Default: no transform

1719

variant_level: D-Bus variant level. Default: 1

1720

"""

1721

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

1722

1723

def setter(self, value):

1724

if hasattr(self, "dbus_object_path"):

1725

if (not hasattr(self, attrname) or

1726

type_func(getattr(self, attrname, None))

1727

!= type_func(value)):

1728

if invalidate_only:

1729

self.PropertiesChanged(

1730

_interface, dbus.Dictionary(),

1731

dbus.Array((dbus_name, )))

1732

else:

1733

dbus_value = transform_func(

1734

type_func(value),

1735

variant_level = variant_level)

1736

self.PropertyChanged(dbus.String(dbus_name),

1737

dbus_value)

1738

self.PropertiesChanged(

1739

_interface,

1740

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

1741

dbus_value }),

1742

dbus.Array())

1743

setattr(self, attrname, value)

1744

1745

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

1746

1747

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1748

approvals_pending = notifychangeproperty(dbus.Boolean,

1749

"ApprovalPending",

1750

type_func = bool)

1751

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

1752

last_enabled = notifychangeproperty(datetime_to_dbus,

1753

"LastEnabled")

1754

checker = notifychangeproperty(

1755

dbus.Boolean, "CheckerRunning",

1756

type_func = lambda checker: checker is not None)

1757

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1758

"LastCheckedOK")

1759

last_checker_status = notifychangeproperty(dbus.Int16,

1760

"LastCheckerStatus")

1761

last_approval_request = notifychangeproperty(

1762

datetime_to_dbus, "LastApprovalRequest")

1763

approved_by_default = notifychangeproperty(dbus.Boolean,

1764

"ApprovedByDefault")

1765

approval_delay = notifychangeproperty(

1766

dbus.UInt64, "ApprovalDelay",

1767

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

1768

approval_duration = notifychangeproperty(

1769

dbus.UInt64, "ApprovalDuration",

1770

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

1771

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

1772

timeout = notifychangeproperty(

1773

dbus.UInt64, "Timeout",

1774

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

1775

extended_timeout = notifychangeproperty(

1776

dbus.UInt64, "ExtendedTimeout",

1777

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

1778

interval = notifychangeproperty(

1779

dbus.UInt64, "Interval",

1780

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

1781

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

1782

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

1783

invalidate_only=True)

1784

1785

del notifychangeproperty

766

767

def _get_approvals_pending(self):

768

return self._approvals_pending

769

def _set_approvals_pending(self, value):

770

old_value = self._approvals_pending

771

self._approvals_pending = value

772

bval = bool(value)

773

if (hasattr(self, "dbus_object_path")

774

and bval is not bool(old_value)):

775

dbus_bool = dbus.Boolean(bval, variant_level=1)

776

self.PropertyChanged(dbus.String("ApprovalPending"),

777

dbus_bool)

778

779

approvals_pending = property(_get_approvals_pending,

780

_set_approvals_pending)

781

del _get_approvals_pending, _set_approvals_pending

782

783

@staticmethod

784

def _datetime_to_dbus(dt, variant_level=0):

785

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

786

return dbus.String(dt.isoformat(),

787

variant_level=variant_level)

788

789

def enable(self):

790

oldstate = getattr(self, "enabled", False)

791

r = Client.enable(self)

792

if oldstate != self.enabled:

793

# Emit D-Bus signals

794

self.PropertyChanged(dbus.String("Enabled"),

795

dbus.Boolean(True, variant_level=1))

796

self.PropertyChanged(

797

dbus.String("LastEnabled"),

798

self._datetime_to_dbus(self.last_enabled,

799

variant_level=1))

800

return r

801

802

def disable(self, quiet = False):

803

oldstate = getattr(self, "enabled", False)

804

r = Client.disable(self, quiet=quiet)

805

if not quiet and oldstate != self.enabled:

806

# Emit D-Bus signal

807

self.PropertyChanged(dbus.String("Enabled"),

808

dbus.Boolean(False, variant_level=1))

809

return r

1786

810

1787

811

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

1788

812

try:

1793

817

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

1794

818

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

1795

819

1796

def checker_callback(self, source, condition,

1797

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

1798

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

1799

connection, command, *args,

1800

**kwargs)

1801

exitstatus = self.last_checker_status

1802

if exitstatus >= 0:

820

def checker_callback(self, pid, condition, command,

821

*args, **kwargs):

822

self.checker_callback_tag = None

823

self.checker = None

824

# Emit D-Bus signal

825

self.PropertyChanged(dbus.String("CheckerRunning"),

826

dbus.Boolean(False, variant_level=1))

827

if os.WIFEXITED(condition):

828

exitstatus = os.WEXITSTATUS(condition)

1803

829

# Emit D-Bus signal

1804

830

self.CheckerCompleted(dbus.Int16(exitstatus),

1805

# This is specific to GNU libC

1806

dbus.Int64(exitstatus << 8),

831

dbus.Int64(condition),

1807

832

dbus.String(command))

1808

833

else:

1809

834

# Emit D-Bus signal

1810

835

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

1811

dbus.Int64(

1812

# This is specific to GNU libC

1813

(exitstatus << 8)

1814

| self.last_checker_signal),

836

dbus.Int64(condition),

1815

837

dbus.String(command))

1816

return ret

838

839

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

840

*args, **kwargs)

841

842

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

843

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

844

# Emit D-Bus signal

845

self.PropertyChanged(

846

dbus.String("LastCheckedOK"),

847

(self._datetime_to_dbus(self.last_checked_ok,

848

variant_level=1)))

849

850

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

851

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

852

# Emit D-Bus signal

853

self.PropertyChanged(

854

dbus.String("LastApprovalRequest"),

855

(self._datetime_to_dbus(self.last_approval_request,

856

variant_level=1)))

857

return r

1817

858

1818

859

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

1819

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

860

old_checker = self.checker

861

if self.checker is not None:

862

old_checker_pid = self.checker.pid

863

else:

864

old_checker_pid = None

1820

865

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

1821

866

# Only if new checker process was started

1822

867

if (self.checker is not None

1823

868

and old_checker_pid != self.checker.pid):

1824

869

# Emit D-Bus signal

1825

870

self.CheckerStarted(self.current_checker_command)

871

self.PropertyChanged(

872

dbus.String("CheckerRunning"),

873

dbus.Boolean(True, variant_level=1))

1826

874

return r

1827

875

876

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

877

old_checker = getattr(self, "checker", None)

878

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

879

if (old_checker is not None

880

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

881

self.PropertyChanged(dbus.String("CheckerRunning"),

882

dbus.Boolean(False, variant_level=1))

883

return r

884

1828

885

def _reset_approved(self):

1829

self.approved = None

886

self._approved = None

1830

887

return False

1831

888

1832

889

def approve(self, value=True):

1833

self.approved = value

1834

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

1835

* 1000), self._reset_approved)

1836

890

self.send_changedstate()

891

self._approved = value

892

gobject.timeout_add(self._timedelta_to_milliseconds

893

(self.approval_duration),

894

self._reset_approved)

895

1837

896

1838

897

## D-Bus methods, signals & properties

1839

1840

## Interfaces

898

_interface = "se.bsnet.fukt.Mandos.Client"

1841

899

1842

900

## Signals

1843

901

1854

912

pass

1855

913

1856

914

# PropertyChanged - signal

1857

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

1858

915

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

1859

916

def PropertyChanged(self, property, value):

1860

917

"D-Bus signal"

1894

951

self.checked_ok()

1895

952

1896

953

# Enable - method

1897

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

1898

954

@dbus.service.method(_interface)

1899

955

def Enable(self):

1900

956

"D-Bus method"

1901

957

self.enable()

1902

958

1903

959

# StartChecker - method

1904

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

1905

960

@dbus.service.method(_interface)

1906

961

def StartChecker(self):

1907

962

"D-Bus method"

1908

963

self.start_checker()

1909

964

1910

965

# Disable - method

1911

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

1912

966

@dbus.service.method(_interface)

1913

967

def Disable(self):

1914

968

"D-Bus method"

1915

969

self.disable()

1916

970

1917

971

# StopChecker - method

1918

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

1919

972

@dbus.service.method(_interface)

1920

973

def StopChecker(self):

1921

974

self.stop_checker()

1928

981

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

1929

982

1930

983

# ApprovedByDefault - property

1931

@dbus_service_property(_interface,

1932

signature="b",

984

@dbus_service_property(_interface, signature="b",

1933

985

access="readwrite")

1934

986

def ApprovedByDefault_dbus_property(self, value=None):

1935

987

if value is None: # get

1936

988

return dbus.Boolean(self.approved_by_default)

1937

989

self.approved_by_default = bool(value)

990

# Emit D-Bus signal

991

self.PropertyChanged(dbus.String("ApprovedByDefault"),

992

dbus.Boolean(value, variant_level=1))

1938

993

1939

994

# ApprovalDelay - property

1940

@dbus_service_property(_interface,

1941

signature="t",

995

@dbus_service_property(_interface, signature="t",

1942

996

access="readwrite")

1943

997

def ApprovalDelay_dbus_property(self, value=None):

1944

998

if value is None: # get

1945

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

1946

* 1000)

999

return dbus.UInt64(self.approval_delay_milliseconds())

1947

1000

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

1001

# Emit D-Bus signal

1002

self.PropertyChanged(dbus.String("ApprovalDelay"),

1003

dbus.UInt64(value, variant_level=1))

1948

1004

1949

1005

# ApprovalDuration - property

1950

@dbus_service_property(_interface,

1951

signature="t",

1006

@dbus_service_property(_interface, signature="t",

1952

1007

access="readwrite")

1953

1008

def ApprovalDuration_dbus_property(self, value=None):

1954

1009

if value is None: # get

1955

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

1956

* 1000)

1010

return dbus.UInt64(self._timedelta_to_milliseconds(

1011

self.approval_duration))

1957

1012

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

1013

# Emit D-Bus signal

1014

self.PropertyChanged(dbus.String("ApprovalDuration"),

1015

dbus.UInt64(value, variant_level=1))

1958

1016

1959

1017

# Name - property

1960

@dbus_annotations(

1961

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

1962

1018

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

1963

1019

def Name_dbus_property(self):

1964

1020

return dbus.String(self.name)

1965

1021

1966

1022

# Fingerprint - property

1967

@dbus_annotations(

1968

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

1969

1023

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

1970

1024

def Fingerprint_dbus_property(self):

1971

1025

return dbus.String(self.fingerprint)

1972

1026

1973

1027

# Host - property

1974

@dbus_service_property(_interface,

1975

signature="s",

1028

@dbus_service_property(_interface, signature="s",

1976

1029

access="readwrite")

1977

1030

def Host_dbus_property(self, value=None):

1978

1031

if value is None: # get

1979

1032

return dbus.String(self.host)

1980

self.host = str(value)

1033

self.host = value

1034

# Emit D-Bus signal

1035

self.PropertyChanged(dbus.String("Host"),

1036

dbus.String(value, variant_level=1))

1981

1037

1982

1038

# Created - property

1983

@dbus_annotations(

1984

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

1985

1039

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

1986

1040

def Created_dbus_property(self):

1987

return datetime_to_dbus(self.created)

1041

return dbus.String(self._datetime_to_dbus(self.created))

1988

1042

1989

1043

# LastEnabled - property

1990

1044

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

1991

1045

def LastEnabled_dbus_property(self):

1992

return datetime_to_dbus(self.last_enabled)

1046

if self.last_enabled is None:

1047

return dbus.String("")

1048

return dbus.String(self._datetime_to_dbus(self.last_enabled))

1993

1049

1994

1050

# Enabled - property

1995

@dbus_service_property(_interface,

1996

signature="b",

1051

@dbus_service_property(_interface, signature="b",

1997

1052

access="readwrite")

1998

1053

def Enabled_dbus_property(self, value=None):

1999

1054

if value is None: # get

2004

1059

self.disable()

2005

1060

2006

1061

# LastCheckedOK - property

2007

@dbus_service_property(_interface,

2008

signature="s",

1062

@dbus_service_property(_interface, signature="s",

2009

1063

access="readwrite")

2010

1064

def LastCheckedOK_dbus_property(self, value=None):

2011

1065

if value is not None:

2012

1066

self.checked_ok()

2013

1067

return

2014

return datetime_to_dbus(self.last_checked_ok)

2015

2016

# LastCheckerStatus - property

2017

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

2018

def LastCheckerStatus_dbus_property(self):

2019

return dbus.Int16(self.last_checker_status)

2020

2021

# Expires - property

2022

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

2023

def Expires_dbus_property(self):

2024

return datetime_to_dbus(self.expires)

1068

if self.last_checked_ok is None:

1069

return dbus.String("")

1070

return dbus.String(self._datetime_to_dbus(self

1071

.last_checked_ok))

2025

1072

2026

1073

# LastApprovalRequest - property

2027

1074

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

2028

1075

def LastApprovalRequest_dbus_property(self):

2029

return datetime_to_dbus(self.last_approval_request)

1076

if self.last_approval_request is None:

1077

return dbus.String("")

1078

return dbus.String(self.

1079

_datetime_to_dbus(self

1080

.last_approval_request))

2030

1081

2031

1082

# Timeout - property

2032

@dbus_service_property(_interface,

2033

signature="t",

1083

@dbus_service_property(_interface, signature="t",

2034

1084

access="readwrite")

2035

1085

def Timeout_dbus_property(self, value=None):

2036

1086

if value is None: # get

2037

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

2038

old_timeout = self.timeout

1087

return dbus.UInt64(self.timeout_milliseconds())

2039

1088

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

2040

# Reschedule disabling

2041

if self.enabled:

2042

now = datetime.datetime.utcnow()

2043

self.expires += self.timeout - old_timeout

2044

if self.expires <= now:

2045

# The timeout has passed

2046

self.disable()

2047

else:

2048

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

2049

is None):

2050

return

2051

GLib.source_remove(self.disable_initiator_tag)

2052

self.disable_initiator_tag = GLib.timeout_add(

2053

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

2054

self.disable)

2055

2056

# ExtendedTimeout - property

2057

@dbus_service_property(_interface,

2058

signature="t",

2059

access="readwrite")

2060

def ExtendedTimeout_dbus_property(self, value=None):

2061

if value is None: # get

2062

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

2063

* 1000)

2064

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

1089

# Emit D-Bus signal

1090

self.PropertyChanged(dbus.String("Timeout"),

1091

dbus.UInt64(value, variant_level=1))

1092

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

1093

return

1094

# Reschedule timeout

1095

gobject.source_remove(self.disable_initiator_tag)

1096

self.disable_initiator_tag = None

1097

time_to_die = (self.

1098

_timedelta_to_milliseconds((self

1099

.last_checked_ok

1100

+ self.timeout)

1101

- datetime.datetime

1102

.utcnow()))

1103

if time_to_die <= 0:

1104

# The timeout has passed

1105

self.disable()

1106

else:

1107

self.disable_initiator_tag = (gobject.timeout_add

1108

(time_to_die, self.disable))

2065

1109

2066

1110

# Interval - property

2067

@dbus_service_property(_interface,

2068

signature="t",

1111

@dbus_service_property(_interface, signature="t",

2069

1112

access="readwrite")

2070

1113

def Interval_dbus_property(self, value=None):

2071

1114

if value is None: # get

2072

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

1115

return dbus.UInt64(self.interval_milliseconds())

2073

1116

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

1117

# Emit D-Bus signal

1118

self.PropertyChanged(dbus.String("Interval"),

1119

dbus.UInt64(value, variant_level=1))

2074

1120

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

2075

1121

return

2076

if self.enabled:

2077

# Reschedule checker run

2078

GLib.source_remove(self.checker_initiator_tag)

2079

self.checker_initiator_tag = GLib.timeout_add(

2080

value, self.start_checker)

2081

self.start_checker() # Start one now, too

2082

1122

# Reschedule checker run

1123

gobject.source_remove(self.checker_initiator_tag)

1124

self.checker_initiator_tag = (gobject.timeout_add

1125

(value, self.start_checker))

1126

self.start_checker() # Start one now, too

1127

2083

1128

# Checker - property

2084

@dbus_service_property(_interface,

2085

signature="s",

1129

@dbus_service_property(_interface, signature="s",

2086

1130

access="readwrite")

2087

1131

def Checker_dbus_property(self, value=None):

2088

1132

if value is None: # get

2089

1133

return dbus.String(self.checker_command)

2090

self.checker_command = str(value)

1134

self.checker_command = value

1135

# Emit D-Bus signal

1136

self.PropertyChanged(dbus.String("Checker"),

1137

dbus.String(self.checker_command,

1138

variant_level=1))

2091

1139

2092

1140

# CheckerRunning - property

2093

@dbus_service_property(_interface,

2094

signature="b",

1141

@dbus_service_property(_interface, signature="b",

2095

1142

access="readwrite")

2096

1143

def CheckerRunning_dbus_property(self, value=None):

2097

1144

if value is None: # get

2102

1149

self.stop_checker()

2103

1150

2104

1151

# ObjectPath - property

2105

@dbus_annotations(

2106

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

2107

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

2108

1152

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

2109

1153

def ObjectPath_dbus_property(self):

2110

1154

return self.dbus_object_path # is already a dbus.ObjectPath

2111

1155

2112

1156

# Secret = property

2113

@dbus_annotations(

2114

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

2115

"invalidates"})

2116

@dbus_service_property(_interface,

2117

signature="ay",

2118

access="write",

2119

byte_arrays=True)

1157

@dbus_service_property(_interface, signature="ay",

1158

access="write", byte_arrays=True)

2120

1159

def Secret_dbus_property(self, value):

2121

self.secret = bytes(value)

1160

self.secret = str(value)

2122

1161

2123

1162

del _interface

2124

1163

2128

1167

self._pipe = child_pipe

2129

1168

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

2130

1169

if not self._pipe.recv():

2131

raise KeyError(fpr)

2132

1170

raise KeyError()

1171

2133

1172

def __getattribute__(self, name):

2134

if name == '_pipe':

1173

if(name == '_pipe'):

2135

1174

return super(ProxyClient, self).__getattribute__(name)

2136

1175

self._pipe.send(('getattr', name))

2137

1176

data = self._pipe.recv()

2138

1177

if data[0] == 'data':

2139

1178

return data[1]

2140

1179

if data[0] == 'function':

2141

2142

1180

def func(*args, **kwargs):

2143

1181

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

2144

1182

return self._pipe.recv()[1]

2145

2146

1183

return func

2147

1184

2148

1185

def __setattr__(self, name, value):

2149

if name == '_pipe':

1186

if(name == '_pipe'):

2150

1187

return super(ProxyClient, self).__setattr__(name, value)

2151

1188

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

2152

1189

2160

1197

def handle(self):

2161

1198

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

2162

1199

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

2163

str(self.client_address))

1200

unicode(self.client_address))

2164

1201

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

2165

1202

self.server.child_pipe.fileno())

2166

2167

session = gnutls.ClientSession(self.request)

2168

1203

1204

session = (gnutls.connection

1205

.ClientSession(self.request,

1206

gnutls.connection

1207

.X509Credentials()))

1208

1209

# Note: gnutls.connection.X509Credentials is really a

1210

# generic GnuTLS certificate credentials object so long as

1211

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

1212

# here despite using OpenPGP certificates.

1213

2169

1214

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

2170

1215

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

2171

1216

# "+COMP-NULL", "+CTYPE-OPENPGP",

2174

1219

priority = self.server.gnutls_priority

2175

1220

if priority is None:

2176

1221

priority = "NORMAL"

2177

gnutls.priority_set_direct(session._c_object,

2178

priority.encode("utf-8"),

2179

None)

2180

1222

(gnutls.library.functions

1223

.gnutls_priority_set_direct(session._c_object,

1224

priority, None))

1225

2181

1226

# Start communication using the Mandos protocol

2182

1227

# Get protocol number

2183

1228

line = self.request.makefile().readline()

2184

1229

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

2185

1230

try:

2186

1231

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

2187

raise RuntimeError(line)

1232

raise RuntimeError

2188

1233

except (ValueError, IndexError, RuntimeError) as error:

2189

1234

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

2190

1235

return

2191

1236

2192

1237

# Start GnuTLS connection

2193

1238

try:

2194

1239

session.handshake()

2195

except gnutls.Error as error:

1240

except gnutls.errors.GNUTLSError as error:

2196

1241

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

2197

1242

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

2198

1243

# established. Just abandon the request.

2199

1244

return

2200

1245

logger.debug("Handshake succeeded")

2201

1246

2202

1247

approval_required = False

2203

1248

try:

2204

1249

try:

2205

fpr = self.fingerprint(

2206

self.peer_certificate(session))

2207

except (TypeError, gnutls.Error) as error:

1250

fpr = self.fingerprint(self.peer_certificate

1251

(session))

1252

except (TypeError,

1253

gnutls.errors.GNUTLSError) as error:

2208

1254

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

2209

1255

return

2210

1256

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

2211

1257

2212

1258

try:

2213

1259

client = ProxyClient(child_pipe, fpr,

2214

1260

self.client_address)

2223

1269

while True:

2224

1270

if not client.enabled:

2225

1271

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

2226

client.name)

1272

client.name)

2227

1273

if self.server.use_dbus:

2228

1274

# Emit D-Bus signal

2229

client.Rejected("Disabled")

1275

client.Rejected("Disabled")

2230

1276

return

2231

1277

2232

if client.approved or not client.approval_delay:

1278

if client._approved or not client.approval_delay:

2233

1279

#We are approved or approval is disabled

2234

1280

break

2235

elif client.approved is None:

1281

elif client._approved is None:

2236

1282

logger.info("Client %s needs approval",

2237

1283

client.name)

2238

1284

if self.server.use_dbus:

2239

1285

# Emit D-Bus signal

2240

1286

client.NeedApproval(

2241

client.approval_delay.total_seconds()

2242

* 1000, client.approved_by_default)

1287

client.approval_delay_milliseconds(),

1288

client.approved_by_default)

2243

1289

else:

2244

1290

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

2245

1291

client.name)

2249

1295

return

2250

1296

2251

1297

#wait until timeout or approved

1298

#x = float(client._timedelta_to_milliseconds(delay))

2252

1299

time = datetime.datetime.now()

2253

1300

client.changedstate.acquire()

2254

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

1301

client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))

2255

1302

client.changedstate.release()

2256

1303

time2 = datetime.datetime.now()

2257

1304

if (time2 - time) >= delay:

2268

1315

else:

2269

1316

delay -= time2 - time

2270

1317

2271

try:

2272

session.send(client.secret)

2273

except gnutls.Error as error:

2274

logger.warning("gnutls send failed",

2275

exc_info = error)

2276

return

2277

1318

sent_size = 0

1319

while sent_size < len(client.secret):

1320

try:

1321

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

1322

except gnutls.errors.GNUTLSError as error:

1323

logger.warning("gnutls send failed")

1324

return

1325

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

1326

sent, len(client.secret)

1327

- (sent_size + sent))

1328

sent_size += sent

1329

2278

1330

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

2279

# bump the timeout using extended_timeout

2280

client.bump_timeout(client.extended_timeout)

1331

# bump the timeout as if seen

1332

client.checked_ok()

2281

1333

if self.server.use_dbus:

2282

1334

# Emit D-Bus signal

2283

1335

client.GotSecret()

2287

1339

client.approvals_pending -= 1

2288

1340

try:

2289

1341

session.bye()

2290

except gnutls.Error as error:

2291

logger.warning("GnuTLS bye failed",

2292

exc_info=error)

1342

except gnutls.errors.GNUTLSError as error:

1343

logger.warning("GnuTLS bye failed")

2293

1344

2294

1345

@staticmethod

2295

1346

def peer_certificate(session):

2296

1347

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

2297

1348

# If not an OpenPGP certificate...

2298

if (gnutls.certificate_type_get(session._c_object)

2299

!= gnutls.CRT_OPENPGP):

2300

# ...return invalid data

2301

return b""

1349

if (gnutls.library.functions

1350

.gnutls_certificate_type_get(session._c_object)

1351

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1352

# ...do the normal thing

1353

return session.peer_certificate

2302

1354

list_size = ctypes.c_uint(1)

2303

cert_list = (gnutls.certificate_get_peers

1355

cert_list = (gnutls.library.functions

1356

.gnutls_certificate_get_peers

2304

1357

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

2305

1358

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

2306

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

1359

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

1360

" certificate")

2307

1361

if list_size.value == 0:

2308

1362

return None

2309

1363

cert = cert_list[0]

2313

1367

def fingerprint(openpgp):

2314

1368

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2315

1369

# New GnuTLS "datum" with the OpenPGP public key

2316

datum = gnutls.datum_t(

2317

ctypes.cast(ctypes.c_char_p(openpgp),

2318

ctypes.POINTER(ctypes.c_ubyte)),

2319

ctypes.c_uint(len(openpgp)))

1370

datum = (gnutls.library.types

1371

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

1372

ctypes.POINTER

1373

(ctypes.c_ubyte)),

1374

ctypes.c_uint(len(openpgp))))

2320

1375

# New empty GnuTLS certificate

2321

crt = gnutls.openpgp_crt_t()

2322

gnutls.openpgp_crt_init(ctypes.byref(crt))

1376

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1377

(gnutls.library.functions

1378

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2323

1379

# Import the OpenPGP public key into the certificate

2324

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

2325

gnutls.OPENPGP_FMT_RAW)

1380

(gnutls.library.functions

1381

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

1382

gnutls.library.constants

1383

.GNUTLS_OPENPGP_FMT_RAW))

2326

1384

# Verify the self signature in the key

2327

1385

crtverify = ctypes.c_uint()

2328

gnutls.openpgp_crt_verify_self(crt, 0,

2329

ctypes.byref(crtverify))

1386

(gnutls.library.functions

1387

.gnutls_openpgp_crt_verify_self(crt, 0,

1388

ctypes.byref(crtverify)))

2330

1389

if crtverify.value != 0:

2331

gnutls.openpgp_crt_deinit(crt)

2332

raise gnutls.CertificateSecurityError("Verify failed")

1390

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1391

raise (gnutls.errors.CertificateSecurityError

1392

("Verify failed"))

2333

1393

# New buffer for the fingerprint

2334

1394

buf = ctypes.create_string_buffer(20)

2335

1395

buf_len = ctypes.c_size_t()

2336

1396

# Get the fingerprint from the certificate into the buffer

2337

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

2338

ctypes.byref(buf_len))

1397

(gnutls.library.functions

1398

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

1399

ctypes.byref(buf_len)))

2339

1400

# Deinit the certificate

2340

gnutls.openpgp_crt_deinit(crt)

1401

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2341

1402

# Convert the buffer to a Python bytestring

2342

1403

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

2343

1404

# Convert the bytestring to hexadecimal notation

2344

hex_fpr = binascii.hexlify(fpr).upper()

1405

hex_fpr = ''.join("%02X" % ord(char) for char in fpr)

2345

1406

return hex_fpr

2346

1407

2347

1408

2348

1409

class MultiprocessingMixIn(object):

2349

1410

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

2350

2351

1411

def sub_process_main(self, request, address):

2352

1412

try:

2353

1413

self.finish_request(request, address)

2354

except Exception:

1414

except:

2355

1415

self.handle_error(request, address)

2356

1416

self.close_request(request)

2357

1417

2358

1418

def process_request(self, request, address):

2359

1419

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

2360

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

2361

args = (request, address))

2362

proc.start()

2363

return proc

2364

1420

multiprocessing.Process(target = self.sub_process_main,

1421

args = (request, address)).start()

2365

1422

2366

1423

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2367

1424

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

2368

2369

1425

def process_request(self, request, client_address):

2370

1426

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

2371

1427

2372

1428

This function creates a new pipe in self.pipe

2373

1429

"""

2374

1430

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2375

2376

proc = MultiprocessingMixIn.process_request(self, request,

2377

client_address)

1431

1432

super(MultiprocessingMixInWithPipe,

1433

self).process_request(request, client_address)

2378

1434

self.child_pipe.close()

2379

self.add_pipe(parent_pipe, proc)

2380

2381

def add_pipe(self, parent_pipe, proc):

1435

self.add_pipe(parent_pipe)

1436

1437

def add_pipe(self, parent_pipe):

2382

1438

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

2383

raise NotImplementedError()

2384

1439

raise NotImplementedError

2385

1440

2386

1441

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2387

1442

socketserver.TCPServer, object):

2392

1447

interface: None or a network interface name (string)

2393

1448

use_ipv6: Boolean; to use IPv6 or not

2394

1449

"""

2395

2396

1450

def __init__(self, server_address, RequestHandlerClass,

2397

interface=None,

2398

use_ipv6=True,

2399

socketfd=None):

2400

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

2401

creating a new one with socket.socket().

2402

"""

1451

interface=None, use_ipv6=True):

2403

1452

self.interface = interface

2404

1453

if use_ipv6:

2405

1454

self.address_family = socket.AF_INET6

2406

if socketfd is not None:

2407

# Save the file descriptor

2408

self.socketfd = socketfd

2409

# Save the original socket.socket() function

2410

self.socket_socket = socket.socket

2411

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

2412

#

2413

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

2414

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

2415

# patching socket.socket.)

2416

#

2417

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

2418

@functools.wraps(socket.socket)

2419

def socket_wrapper(*args, **kwargs):

2420

# Restore original function so subsequent calls are

2421

# not affected.

2422

socket.socket = self.socket_socket

2423

del self.socket_socket

2424

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

2425

# saved file descriptor.

2426

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

2427

# Replace socket.socket() function with wrapper

2428

socket.socket = socket_wrapper

2429

# The socketserver.TCPServer.__init__ will call

2430

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

2431

# socket_wrapper(), if socketfd was set.

2432

1455

socketserver.TCPServer.__init__(self, server_address,

2433

1456

RequestHandlerClass)

2434

2435

1457

def server_bind(self):

2436

1458

"""This overrides the normal server_bind() function

2437

1459

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

2443

1465

self.interface)

2444

1466

else:

2445

1467

try:

2446

self.socket.setsockopt(

2447

socket.SOL_SOCKET, SO_BINDTODEVICE,

2448

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

1468

self.socket.setsockopt(socket.SOL_SOCKET,

1469

SO_BINDTODEVICE,

1470

str(self.interface

1471

+ '\0'))

2449

1472

except socket.error as error:

2450

if error.errno == errno.EPERM:

2451

logger.error("No permission to bind to"

2452

" interface %s", self.interface)

2453

elif error.errno == errno.ENOPROTOOPT:

1473

if error[0] == errno.EPERM:

1474

logger.error("No permission to"

1475

" bind to interface %s",

1476

self.interface)

1477

elif error[0] == errno.ENOPROTOOPT:

2454

1478

logger.error("SO_BINDTODEVICE not available;"

2455

1479

" cannot bind to interface %s",

2456

1480

self.interface)

2457

elif error.errno == errno.ENODEV:

2458

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

2459

" cannot bind", self.interface)

2460

1481

else:

2461

1482

raise

2462

1483

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

2465

1486

if self.address_family == socket.AF_INET6:

2466

1487

any_address = "::" # in6addr_any

2467

1488

else:

2468

any_address = "0.0.0.0" # INADDR_ANY

1489

any_address = socket.INADDR_ANY

2469

1490

self.server_address = (any_address,

2470

1491

self.server_address[1])

2471

1492

elif not self.server_address[1]:

2472

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

1493

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

1494

0)

2473

1495

# if self.interface:

2474

1496

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

2475

1497

# 0, # port

2487

1509

gnutls_priority GnuTLS priority string

2488

1510

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

2489

1511

2490

Assumes a GLib.MainLoop event loop.

1512

Assumes a gobject.MainLoop event loop.

2491

1513

"""

2492

2493

1514

def __init__(self, server_address, RequestHandlerClass,

2494

interface=None,

2495

use_ipv6=True,

2496

clients=None,

2497

gnutls_priority=None,

2498

use_dbus=True,

2499

socketfd=None):

1515

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

1516

gnutls_priority=None, use_dbus=True):

2500

1517

self.enabled = False

2501

1518

self.clients = clients

2502

1519

if self.clients is None:

2503

self.clients = {}

1520

self.clients = set()

2504

1521

self.use_dbus = use_dbus

2505

1522

self.gnutls_priority = gnutls_priority

2506

1523

IPv6_TCPServer.__init__(self, server_address,

2507

1524

RequestHandlerClass,

2508

1525

interface = interface,

2509

use_ipv6 = use_ipv6,

2510

socketfd = socketfd)

2511

1526

use_ipv6 = use_ipv6)

2512

1527

def server_activate(self):

2513

1528

if self.enabled:

2514

1529

return socketserver.TCPServer.server_activate(self)

2515

2516

1530

def enable(self):

2517

1531

self.enabled = True

2518

2519

def add_pipe(self, parent_pipe, proc):

1532

def add_pipe(self, parent_pipe):

2520

1533

# Call "handle_ipc" for both data and EOF events

2521

GLib.io_add_watch(

2522

parent_pipe.fileno(),

2523

GLib.IO_IN | GLib.IO_HUP,

2524

functools.partial(self.handle_ipc,

2525

parent_pipe = parent_pipe,

2526

proc = proc))

2527

2528

def handle_ipc(self, source, condition,

2529

parent_pipe=None,

2530

proc = None,

1534

gobject.io_add_watch(parent_pipe.fileno(),

1535

gobject.IO_IN | gobject.IO_HUP,

1536

functools.partial(self.handle_ipc,

1537

parent_pipe = parent_pipe))

1538

1539

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

2531

1540

client_object=None):

2532

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

2533

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

2534

# Wait for other process to exit

2535

proc.join()

1541

condition_names = {

1542

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

1543

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

1544

# blocking).

1545

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

1546

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

1547

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

1548

# broken, usually for pipes and

1549

# sockets).

1550

}

1551

conditions_string = ' | '.join(name

1552

for cond, name in

1553

condition_names.iteritems()

1554

if cond & condition)

1555

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

1556

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

2536

1557

return False

2537

1558

2538

1559

# Read a request from the child

2543

1564

fpr = request[1]

2544

1565

address = request[2]

2545

1566

2546

for c in self.clients.values():

1567

for c in self.clients:

2547

1568

if c.fingerprint == fpr:

2548

1569

client = c

2549

1570

break

2552

1573

"dress: %s", fpr, address)

2553

1574

if self.use_dbus:

2554

1575

# Emit D-Bus signal

2555

mandos_dbus_service.ClientNotFound(fpr,

2556

address[0])

1576

mandos_dbus_service.ClientNotFound(fpr, address[0])

2557

1577

parent_pipe.send(False)

2558

1578

return False

2559

1579

2560

GLib.io_add_watch(

2561

parent_pipe.fileno(),

2562

GLib.IO_IN | GLib.IO_HUP,

2563

functools.partial(self.handle_ipc,

2564

parent_pipe = parent_pipe,

2565

proc = proc,

2566

client_object = client))

1580

gobject.io_add_watch(parent_pipe.fileno(),

1581

gobject.IO_IN | gobject.IO_HUP,

1582

functools.partial(self.handle_ipc,

1583

parent_pipe = parent_pipe,

1584

client_object = client))

2567

1585

parent_pipe.send(True)

2568

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

2569

# same fileno

1586

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

2570

1587

return False

2571

1588

if command == 'funcall':

2572

1589

funcname = request[1]

2573

1590

args = request[2]

2574

1591

kwargs = request[3]

2575

1592

2576

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

2577

funcname)(*args,

2578

**kwargs)))

2579

1593

parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))

1594

2580

1595

if command == 'getattr':

2581

1596

attrname = request[1]

2582

if isinstance(client_object.__getattribute__(attrname),

2583

collections.Callable):

2584

parent_pipe.send(('function', ))

1597

if callable(client_object.__getattribute__(attrname)):

1598

parent_pipe.send(('function',))

2585

1599

else:

2586

parent_pipe.send((

2587

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

1600

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

2588

1601

2589

1602

if command == 'setattr':

2590

1603

attrname = request[1]

2591

1604

value = request[2]

2592

1605

setattr(client_object, attrname, value)

2593

1606

2594

1607

return True

2595

1608

2596

1609

2597

def rfc3339_duration_to_delta(duration):

2598

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

2599

2600

>>> rfc3339_duration_to_delta("P7D")

2601

datetime.timedelta(7)

2602

>>> rfc3339_duration_to_delta("PT60S")

2603

datetime.timedelta(0, 60)

2604

>>> rfc3339_duration_to_delta("PT60M")

2605

datetime.timedelta(0, 3600)

2606

>>> rfc3339_duration_to_delta("PT24H")

2607

datetime.timedelta(1)

2608

>>> rfc3339_duration_to_delta("P1W")

2609

datetime.timedelta(7)

2610

>>> rfc3339_duration_to_delta("PT5M30S")

2611

datetime.timedelta(0, 330)

2612

>>> rfc3339_duration_to_delta("P1DT3M20S")

2613

datetime.timedelta(1, 200)

2614

"""

2615

2616

# Parsing an RFC 3339 duration with regular expressions is not

2617

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

2618

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

2619

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

2620

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

2621

# avoid excessive use of external libraries.

2622

2623

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

2624

Token = collections.namedtuple("Token", (

2625

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

2626

# a "group" containing digits

2627

"value", # datetime.timedelta or None

2628

"followers")) # Tokens valid after this token

2629

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

2630

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

2631

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

2632

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

2633

datetime.timedelta(seconds=1),

2634

frozenset((token_end, )))

2635

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

2636

datetime.timedelta(minutes=1),

2637

frozenset((token_second, token_end)))

2638

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

2639

datetime.timedelta(hours=1),

2640

frozenset((token_minute, token_end)))

2641

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

2642

None,

2643

frozenset((token_hour, token_minute,

2644

token_second)))

2645

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

2646

datetime.timedelta(days=1),

2647

frozenset((token_time, token_end)))

2648

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

2649

datetime.timedelta(weeks=4),

2650

frozenset((token_day, token_end)))

2651

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

2652

datetime.timedelta(weeks=52),

2653

frozenset((token_month, token_end)))

2654

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

2655

datetime.timedelta(weeks=1),

2656

frozenset((token_end, )))

2657

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

2658

frozenset((token_year, token_month,

2659

token_day, token_time,

2660

token_week)))

2661

# Define starting values

2662

value = datetime.timedelta() # Value so far

2663

found_token = None

2664

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

2665

s = duration # String left to parse

2666

# Loop until end token is found

2667

while found_token is not token_end:

2668

# Search for any currently valid tokens

2669

for token in followers:

2670

match = token.regexp.match(s)

2671

if match is not None:

2672

# Token found

2673

if token.value is not None:

2674

# Value found, parse digits

2675

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

2676

# Add to value so far

2677

value += factor * token.value

2678

# Strip token from string

2679

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

2680

# Go to found token

2681

found_token = token

2682

# Set valid next tokens

2683

followers = found_token.followers

2684

break

2685

else:

2686

# No currently valid tokens were found

2687

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

2688

.format(duration))

2689

# End token found

2690

return value

2691

2692

2693

1610

def string_to_delta(interval):

2694

1611

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

2695

1612

2706

1623

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

2707

1624

datetime.timedelta(0, 330)

2708

1625

"""

2709

2710

try:

2711

return rfc3339_duration_to_delta(interval)

2712

except ValueError:

2713

pass

2714

2715

1626

timevalue = datetime.timedelta(0)

2716

1627

for s in interval.split():

2717

1628

try:

2718

suffix = s[-1]

1629

suffix = unicode(s[-1])

2719

1630

value = int(s[:-1])

2720

1631

if suffix == "d":

2721

1632

delta = datetime.timedelta(value)

2728

1639

elif suffix == "w":

2729

1640

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

2730

1641

else:

2731

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

2732

except IndexError as e:

1642

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

1643

except (ValueError, IndexError) as e:

2733

1644

raise ValueError(*(e.args))

2734

1645

timevalue += delta

2735

1646

return timevalue

2736

1647

2737

1648

1649

def if_nametoindex(interface):

1650

"""Call the C function if_nametoindex(), or equivalent

1651

1652

Note: This function cannot accept a unicode string."""

1653

global if_nametoindex

1654

try:

1655

if_nametoindex = (ctypes.cdll.LoadLibrary

1656

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

1657

.if_nametoindex)

1658

except (OSError, AttributeError):

1659

logger.warning("Doing if_nametoindex the hard way")

1660

def if_nametoindex(interface):

1661

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

1662

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

1663

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

1664

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1665

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

1666

interface))

1667

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

1668

ifreq[16:20])[0]

1669

return interface_index

1670

return if_nametoindex(interface)

1671

1672

2738

1673

def daemon(nochdir = False, noclose = False):

2739

1674

"""See daemon(3). Standard BSD Unix function.

2740

1675

2748

1683

sys.exit()

2749

1684

if not noclose:

2750

1685

# Close all standard open file descriptors

2751

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

1686

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

2752

1687

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

2753

1688

raise OSError(errno.ENODEV,

2754

"{} not a character device"

2755

.format(os.devnull))

1689

"%s not a character device"

1690

% os.path.devnull)

2756

1691

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

2757

1692

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

2758

1693

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

2767

1702

2768

1703

parser = argparse.ArgumentParser()

2769

1704

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

2770

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

1705

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

2771

1706

help="show version number and exit")

2772

1707

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

2773

1708

help="Bind to interface IF")

2779

1714

help="Run self-test")

2780

1715

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

2781

1716

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

2782

" to terminal", default=None)

1717

" to terminal")

2783

1718

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

2784

1719

help="Debug level for stdout output")

2785

1720

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

2792

1727

" files")

2793

1728

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

2794

1729

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

2795

" system bus interface", default=None)

1730

" system bus interface")

2796

1731

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

2797

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

2798

default=None)

2799

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

2800

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

2801

" state", default=None)

2802

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

2803

help="Specify a file descriptor to a network"

2804

" socket to use instead of creating one")

2805

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

2806

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

2807

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

2808

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

2809

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

2810

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

2811

default=None)

2812

1732

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

2813

1733

options = parser.parse_args()

2814

1734

2815

1735

if options.check:

2816

1736

import doctest

2817

fail_count, test_count = doctest.testmod()

2818

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

1737

doctest.testmod()

1738

sys.exit()

2819

1739

2820

1740

# Default values for config file for server-global settings

2821

1741

server_defaults = { "interface": "",

2823

1743

"port": "",

2824

1744

"debug": "False",

2825

1745

"priority":

2826

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

2827

":+SIGN-DSA-SHA256",

1746

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

2828

1747

"servicename": "Mandos",

2829

1748

"use_dbus": "True",

2830

1749

"use_ipv6": "True",

2831

1750

"debuglevel": "",

2832

"restore": "True",

2833

"socket": "",

2834

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

2835

"foreground": "False",

2836

"zeroconf": "True",

2837

}

1751

}

2838

1752

2839

1753

# Parse config file for server-global settings

2840

1754

server_config = configparser.SafeConfigParser(server_defaults)

2841

1755

del server_defaults

2842

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

1756

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

1757

"mandos.conf"))

2843

1758

# Convert the SafeConfigParser object to a dict

2844

1759

server_settings = server_config.defaults()

2845

1760

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

2846

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

1761

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

2847

1762

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

2848

1763

option)

2849

1764

if server_settings["port"]:

2850

1765

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

2851

1766

"port")

2852

if server_settings["socket"]:

2853

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

2854

"socket")

2855

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

2856

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

2857

# happen with a supplied network socket.

2858

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

2859

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

2860

["socket"])

2861

1767

del server_config

2862

1768

2863

1769

# Override the settings from the config file with command line

2864

1770

# options, if set.

2865

1771

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

2866

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

2867

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

2868

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

1772

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

1773

"use_dbus", "use_ipv6", "debuglevel"):

2869

1774

value = getattr(options, option)

2870

1775

if value is not None:

2871

1776

server_settings[option] = value

2872

1777

del options

2873

1778

# Force all strings to be unicode

2874

1779

for option in server_settings.keys():

2875

if isinstance(server_settings[option], bytes):

2876

server_settings[option] = (server_settings[option]

2877

.decode("utf-8"))

2878

# Force all boolean options to be boolean

2879

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

2880

"foreground", "zeroconf"):

2881

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

2882

# Debug implies foreground

2883

if server_settings["debug"]:

2884

server_settings["foreground"] = True

1780

if type(server_settings[option]) is str:

1781

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

2885

1782

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

2886

1783

2887

1784

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

2888

1785

2889

if (not server_settings["zeroconf"]

2890

and not (server_settings["port"]

2891

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

2892

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

2893

2894

1786

# For convenience

2895

1787

debug = server_settings["debug"]

2896

1788

debuglevel = server_settings["debuglevel"]

2897

1789

use_dbus = server_settings["use_dbus"]

2898

1790

use_ipv6 = server_settings["use_ipv6"]

2899

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

2900

stored_state_file)

2901

foreground = server_settings["foreground"]

2902

zeroconf = server_settings["zeroconf"]

2903

2904

if debug:

2905

initlogger(debug, logging.DEBUG)

2906

else:

2907

if not debuglevel:

2908

initlogger(debug)

2909

else:

2910

level = getattr(logging, debuglevel.upper())

2911

initlogger(debug, level)

2912

1791

2913

1792

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

2914

syslogger.setFormatter(

2915

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

2916

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

2917

server_settings["servicename"])))

1793

syslogger.setFormatter(logging.Formatter

1794

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

1795

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

1796

% server_settings["servicename"]))

2918

1797

2919

1798

# Parse config file with clients

2920

client_config = configparser.SafeConfigParser(Client

2921

.client_defaults)

1799

client_defaults = { "timeout": "1h",

1800

"interval": "5m",

1801

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

1802

"host": "",

1803

"approval_delay": "0s",

1804

"approval_duration": "1s",

1805

}

1806

client_config = configparser.SafeConfigParser(client_defaults)

2922

1807

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

2923

1808

"clients.conf"))

2924

1809

2925

1810

global mandos_dbus_service

2926

1811

mandos_dbus_service = None

2927

1812

2928

socketfd = None

2929

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

2930

socketfd = server_settings["socket"]

2931

tcp_server = MandosServer(

2932

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

2933

ClientHandler,

2934

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

2935

use_ipv6=use_ipv6,

2936

gnutls_priority=server_settings["priority"],

2937

use_dbus=use_dbus,

2938

socketfd=socketfd)

2939

if not foreground:

2940

pidfilename = "/run/mandos.pid"

2941

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

2942

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

2943

pidfile = None

1813

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

1814

server_settings["port"]),

1815

ClientHandler,

1816

interface=(server_settings["interface"]

1817

or None),

1818

use_ipv6=use_ipv6,

1819

gnutls_priority=

1820

server_settings["priority"],

1821

use_dbus=use_dbus)

1822

if not debug:

1823

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

2944

1824

try:

2945

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

2946

except IOError as e:

2947

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

2948

exc_info=e)

1825

pidfile = open(pidfilename, "w")

1826

except IOError:

1827

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

2949

1828

2950

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

2951

("mandos", "mandos"),

2952

("nobody", "nogroup")):

1829

try:

1830

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

1831

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

1832

except KeyError:

2953

1833

try:

2954

uid = pwd.getpwnam(name).pw_uid

2955

gid = pwd.getpwnam(group).pw_gid

2956

break

1834

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

1835

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

2957

1836

except KeyError:

2958

continue

2959

else:

2960

uid = 65534

2961

gid = 65534

1837

try:

1838

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

1839

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

1840

except KeyError:

1841

uid = 65534

1842

gid = 65534

2962

1843

try:

2963

1844

os.setgid(gid)

2964

1845

os.setuid(uid)

2965

if debug:

2966

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

2967

gid))

2968

1846

except OSError as error:

2969

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

2970

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

2971

if error.errno != errno.EPERM:

2972

raise

1847

if error[0] != errno.EPERM:

1848

raise error

2973

1849

1850

if not debug and not debuglevel:

1851

syslogger.setLevel(logging.WARNING)

1852

console.setLevel(logging.WARNING)

1853

if debuglevel:

1854

level = getattr(logging, debuglevel.upper())

1855

syslogger.setLevel(level)

1856

console.setLevel(level)

1857

2974

1858

if debug:

2975

1859

# Enable all possible GnuTLS debugging

2976

1860

2977

1861

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

2978

1862

# - GnuTLS manual

2979

gnutls.global_set_log_level(11)

1863

gnutls.library.functions.gnutls_global_set_log_level(11)

2980

1864

2981

@gnutls.log_func

1865

@gnutls.library.types.gnutls_log_func

2982

1866

def debug_gnutls(level, string):

2983

1867

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

2984

1868

2985

gnutls.global_set_log_function(debug_gnutls)

1869

(gnutls.library.functions

1870

.gnutls_global_set_log_function(debug_gnutls))

2986

1871

2987

1872

# Redirect stdin so all checkers get /dev/null

2988

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

1873

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

2989

1874

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

2990

1875

if null > 2:

2991

1876

os.close(null)

1877

else:

1878

# No console logging

1879

logger.removeHandler(console)

2992

1880

2993

1881

# Need to fork before connecting to D-Bus

2994

if not foreground:

1882

if not debug:

2995

1883

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

2996

1884

daemon()

2997

1885

2998

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

2999

# to inform GLib that threads will be used.

3000

GLib.threads_init()

3001

3002

1886

global main_loop

3003

1887

# From the Avahi example code

3004

DBusGMainLoop(set_as_default=True)

3005

main_loop = GLib.MainLoop()

1888

DBusGMainLoop(set_as_default=True )

1889

main_loop = gobject.MainLoop()

3006

1890

bus = dbus.SystemBus()

3007

1891

# End of Avahi example code

3008

1892

if use_dbus:

3009

1893

try:

3010

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

3011

bus,

3012

do_not_queue=True)

3013

old_bus_name = dbus.service.BusName(

3014

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

3015

do_not_queue=True)

3016

except dbus.exceptions.DBusException as e:

3017

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

1894

bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",

1895

bus, do_not_queue=True)

1896

except dbus.exceptions.NameExistsException as e:

1897

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

3018

1898

use_dbus = False

3019

1899

server_settings["use_dbus"] = False

3020

1900

tcp_server.use_dbus = False

3021

if zeroconf:

3022

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3023

service = AvahiServiceToSyslog(

3024

name = server_settings["servicename"],

3025

servicetype = "_mandos._tcp",

3026

protocol = protocol,

3027

bus = bus)

3028

if server_settings["interface"]:

3029

service.interface = if_nametoindex(

3030

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

1901

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1902

service = AvahiService(name = server_settings["servicename"],

1903

servicetype = "_mandos._tcp",

1904

protocol = protocol, bus = bus)

1905

if server_settings["interface"]:

1906

service.interface = (if_nametoindex

1907

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

3031

1908

3032

1909

global multiprocessing_manager

3033

1910

multiprocessing_manager = multiprocessing.Manager()

3035

1912

client_class = Client

3036

1913

if use_dbus:

3037

1914

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

3038

3039

client_settings = Client.config_parser(client_config)

3040

old_client_settings = {}

3041

clients_data = {}

3042

3043

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

3044

global wnull

3045

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

3046

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

3047

# mode

3048

if debug or not foreground:

3049

wnull.close()

3050

3051

# Get client data and settings from last running state.

3052

if server_settings["restore"]:

3053

try:

3054

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

3055

if sys.version_info.major == 2:

3056

clients_data, old_client_settings = pickle.load(

3057

stored_state)

3058

else:

3059

bytes_clients_data, bytes_old_client_settings = (

3060

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

3061

### Fix bytes to strings

3062

## clients_data

3063

# .keys()

3064

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

3065

if isinstance(key, bytes)

3066

else key): value

3067

for key, value in

3068

bytes_clients_data.items() }

3069

del bytes_clients_data

3070

for key in clients_data:

3071

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

3072

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

3073

for k, v in

3074

clients_data[key].items() }

3075

clients_data[key] = value

3076

# .client_structure

3077

value["client_structure"] = [

3078

(s.decode("utf-8")

3079

if isinstance(s, bytes)

3080

else s) for s in

3081

value["client_structure"] ]

3082

# .name & .host

3083

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

3084

if isinstance(value[k], bytes):

3085

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

3086

## old_client_settings

3087

# .keys()

3088

old_client_settings = {

3089

(key.decode("utf-8")

3090

if isinstance(key, bytes)

3091

else key): value

3092

for key, value in

3093

bytes_old_client_settings.items() }

3094

del bytes_old_client_settings

3095

# .host

3096

for value in old_client_settings.values():

3097

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

3098

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

3099

.decode("utf-8"))

3100

os.remove(stored_state_path)

3101

except IOError as e:

3102

if e.errno == errno.ENOENT:

3103

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

3104

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

3105

else:

3106

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

3107

exc_info=e)

3108

raise

3109

except EOFError as e:

3110

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

3111

"EOFError:",

3112

exc_info=e)

3113

3114

with PGPEngine() as pgp:

3115

for client_name, client in clients_data.items():

3116

# Skip removed clients

3117

if client_name not in client_settings:

3118

continue

3119

3120

# Decide which value to use after restoring saved state.

3121

# We have three different values: Old config file,

3122

# new config file, and saved state.

3123

# New config value takes precedence if it differs from old

3124

# config value, otherwise use saved state.

3125

for name, value in client_settings[client_name].items():

3126

try:

3127

# For each value in new config, check if it

3128

# differs from the old config value (Except for

3129

# the "secret" attribute)

3130

if (name != "secret"

3131

and (value !=

3132

old_client_settings[client_name][name])):

3133

client[name] = value

3134

except KeyError:

3135

pass

3136

3137

# Clients who has passed its expire date can still be

3138

# enabled if its last checker was successful. A Client

3139

# whose checker succeeded before we stored its state is

3140

# assumed to have successfully run all checkers during

3141

# downtime.

3142

if client["enabled"]:

3143

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

3144

if not client["last_checked_ok"]:

3145

logger.warning(

3146

"disabling client {} - Client never "

3147

"performed a successful checker".format(

3148

client_name))

3149

client["enabled"] = False

3150

elif client["last_checker_status"] != 0:

3151

logger.warning(

3152

"disabling client {} - Client last"

3153

" checker failed with error code"

3154

" {}".format(

3155

client_name,

3156

client["last_checker_status"]))

3157

client["enabled"] = False

3158

else:

3159

client["expires"] = (

3160

datetime.datetime.utcnow()

3161

+ client["timeout"])

3162

logger.debug("Last checker succeeded,"

3163

" keeping {} enabled".format(

3164

client_name))

1915

def client_config_items(config, section):

1916

special_settings = {

1917

"approved_by_default":

1918

lambda: config.getboolean(section,

1919

"approved_by_default"),

1920

}

1921

for name, value in config.items(section):

3165

1922

try:

3166

client["secret"] = pgp.decrypt(

3167

client["encrypted_secret"],

3168

client_settings[client_name]["secret"])

3169

except PGPError:

3170

# If decryption fails, we use secret from new settings

3171

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

3172

client_name))

3173

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

3174

["secret"])

3175

3176

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

3177

for client_name in (set(old_client_settings)

3178

- set(client_settings)):

3179

del clients_data[client_name]

3180

for client_name in (set(client_settings)

3181

- set(old_client_settings)):

3182

clients_data[client_name] = client_settings[client_name]

3183

3184

# Create all client objects

3185

for client_name, client in clients_data.items():

3186

tcp_server.clients[client_name] = client_class(

3187

name = client_name,

3188

settings = client,

3189

server_settings = server_settings)

3190

1923

yield (name, special_settings[name]())

1924

except KeyError:

1925

yield (name, value)

1926

1927

tcp_server.clients.update(set(

1928

client_class(name = section,

1929

config= dict(client_config_items(

1930

client_config, section)))

1931

for section in client_config.sections()))

3191

1932

if not tcp_server.clients:

3192

1933

logger.warning("No clients defined")

3193

3194

if not foreground:

3195

if pidfile is not None:

3196

pid = os.getpid()

3197

try:

3198

with pidfile:

3199

print(pid, file=pidfile)

3200

except IOError:

3201

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

3202

pidfilename, pid)

3203

del pidfile

1934

1935

if not debug:

1936

try:

1937

with pidfile:

1938

pid = os.getpid()

1939

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

1940

del pidfile

1941

except IOError:

1942

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

1943

pidfilename, pid)

1944

except NameError:

1945

# "pidfile" was never created

1946

pass

3204

1947

del pidfilename

3205

3206

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

3207

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3208

lambda: main_loop.quit() and False)

1948

1949

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

1950

1951

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

1952

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

3209

1953

3210

1954

if use_dbus:

3211

3212

@alternate_dbus_interfaces(

3213

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

3214

class MandosDBusService(DBusObjectWithObjectManager):

1955

class MandosDBusService(dbus.service.Object):

3215

1956

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

3216

3217

1957

def __init__(self):

3218

1958

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

3219

3220

_interface = "se.recompile.Mandos"

1959

_interface = "se.bsnet.fukt.Mandos"

3221

1960

3222

1961

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

3223

1962

def ClientAdded(self, objpath):

3229

1968

"D-Bus signal"

3230

1969

pass

3231

1970

3232

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

3233

"true"})

3234

1971

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

3235

1972

def ClientRemoved(self, objpath, name):

3236

1973

"D-Bus signal"

3237

1974

pass

3238

1975

3239

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

3240

"true"})

3241

1976

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

3242

1977

def GetAllClients(self):

3243

1978

"D-Bus method"

3244

return dbus.Array(c.dbus_object_path for c in

3245

tcp_server.clients.values())

1979

return dbus.Array(c.dbus_object_path

1980

for c in tcp_server.clients)

3246

1981

3247

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

3248

"true"})

3249

1982

@dbus.service.method(_interface,

3250

1983

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

3251

1984

def GetAllClientsWithProperties(self):

3252

1985

"D-Bus method"

3253

1986

return dbus.Dictionary(

3254

{ c.dbus_object_path: c.GetAll(

3255

"se.recompile.Mandos.Client")

3256

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

1987

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

1988

for c in tcp_server.clients),

3257

1989

signature="oa{sv}")

3258

1990

3259

1991

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

3260

1992

def RemoveClient(self, object_path):

3261

1993

"D-Bus method"

3262

for c in tcp_server.clients.values():

1994

for c in tcp_server.clients:

3263

1995

if c.dbus_object_path == object_path:

3264

del tcp_server.clients[c.name]

1996

tcp_server.clients.remove(c)

3265

1997

c.remove_from_connection()

3266

# Don't signal the disabling

1998

# Don't signal anything except ClientRemoved

3267

1999

c.disable(quiet=True)

3268

# Emit D-Bus signal for removal

3269

self.client_removed_signal(c)

2000

# Emit D-Bus signal

2001

self.ClientRemoved(object_path, c.name)

3270

2002

return

3271

2003

raise KeyError(object_path)

3272

2004

3273

2005

del _interface

3274

3275

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3276

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

3277

def GetManagedObjects(self):

3278

"""D-Bus method"""

3279

return dbus.Dictionary(

3280

{ client.dbus_object_path:

3281

dbus.Dictionary(

3282

{ interface: client.GetAll(interface)

3283

for interface in

3284

client._get_all_interface_names()})

3285

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

3286

3287

def client_added_signal(self, client):

3288

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

3289

if use_dbus:

3290

# New standard signal

3291

self.InterfacesAdded(

3292

client.dbus_object_path,

3293

dbus.Dictionary(

3294

{ interface: client.GetAll(interface)

3295

for interface in

3296

client._get_all_interface_names()}))

3297

# Old signal

3298

self.ClientAdded(client.dbus_object_path)

3299

3300

def client_removed_signal(self, client):

3301

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

3302

if use_dbus:

3303

# New standard signal

3304

self.InterfacesRemoved(

3305

client.dbus_object_path,

3306

client._get_all_interface_names())

3307

# Old signal

3308

self.ClientRemoved(client.dbus_object_path,

3309

client.name)

3310

2006

3311

2007

mandos_dbus_service = MandosDBusService()

3312

2008

3313

# Save modules to variables to exempt the modules from being

3314

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

3315

mp = multiprocessing

3316

wn = wnull

3317

2009

def cleanup():

3318

2010

"Cleanup function; run on exit"

3319

if zeroconf:

3320

service.cleanup()

3321

3322

mp.active_children()

3323

wn.close()

3324

if not (tcp_server.clients or client_settings):

3325

return

3326

3327

# Store client before exiting. Secrets are encrypted with key

3328

# based on what config file has. If config file is

3329

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

3330

clients = {}

3331

with PGPEngine() as pgp:

3332

for client in tcp_server.clients.values():

3333

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

3334

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

3335

key)

3336

client_dict = {}

3337

3338

# A list of attributes that can not be pickled

3339

# + secret.

3340

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

3341

"checker", "server_settings" }

3342

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

3343

.Object):

3344

exclude.add(name)

3345

3346

client_dict["encrypted_secret"] = (client

3347

.encrypted_secret)

3348

for attr in client.client_structure:

3349

if attr not in exclude:

3350

client_dict[attr] = getattr(client, attr)

3351

3352

clients[client.name] = client_dict

3353

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

3354

3355

try:

3356

with tempfile.NamedTemporaryFile(

3357

mode='wb',

3358

suffix=".pickle",

3359

prefix='clients-',

3360

dir=os.path.dirname(stored_state_path),

3361

delete=False) as stored_state:

3362

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

3363

protocol = 2)

3364

tempname = stored_state.name

3365

os.rename(tempname, stored_state_path)

3366

except (IOError, OSError) as e:

3367

if not debug:

3368

try:

3369

os.remove(tempname)

3370

except NameError:

3371

pass

3372

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

3373

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

3374

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

3375

else:

3376

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

3377

exc_info=e)

3378

raise

3379

3380

# Delete all clients, and settings from config

2011

service.cleanup()

2012

3381

2013

while tcp_server.clients:

3382

name, client = tcp_server.clients.popitem()

2014

client = tcp_server.clients.pop()

3383

2015

if use_dbus:

3384

2016

client.remove_from_connection()

3385

# Don't signal the disabling

2017

client.disable_hook = None

2018

# Don't signal anything except ClientRemoved

3386

2019

client.disable(quiet=True)

3387

# Emit D-Bus signal for removal

3388

2020

if use_dbus:

3389

mandos_dbus_service.client_removed_signal(client)

3390

client_settings.clear()

2021

# Emit D-Bus signal

2022

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2023

client.name)

3391

2024

3392

2025

atexit.register(cleanup)

3393

2026

3394

for client in tcp_server.clients.values():

2027

for client in tcp_server.clients:

3395

2028

if use_dbus:

3396

# Emit D-Bus signal for adding

3397

mandos_dbus_service.client_added_signal(client)

3398

# Need to initiate checking of clients

3399

if client.enabled:

3400

client.init_checker()

2029

# Emit D-Bus signal

2030

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2031

client.enable()

3401

2032

3402

2033

tcp_server.enable()

3403

2034

tcp_server.server_activate()

3404

2035

3405

2036

# Find out what port we got

3406

if zeroconf:

3407

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

2037

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

3408

2038

if use_ipv6:

3409

2039

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

3410

" flowinfo %d, scope_id %d",

3411

*tcp_server.socket.getsockname())

2040

" flowinfo %d, scope_id %d"

2041

% tcp_server.socket.getsockname())

3412

2042

else: # IPv4

3413

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

3414

*tcp_server.socket.getsockname())

2043

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

2044

% tcp_server.socket.getsockname())

3415

2045

3416

2046

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

3417

2047

3418

2048

try:

3419

if zeroconf:

3420

# From the Avahi example code

3421

try:

3422

service.activate()

3423

except dbus.exceptions.DBusException as error:

3424

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

3425

cleanup()

3426

sys.exit(1)

3427

# End of Avahi example code

2049

# From the Avahi example code

2050

try:

2051

service.activate()

2052

except dbus.exceptions.DBusException as error:

2053

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

2054

cleanup()

2055

sys.exit(1)

2056

# End of Avahi example code

3428

2057

3429

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

3430

lambda *args, **kwargs:

3431

(tcp_server.handle_request

3432

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

2058

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

2059

lambda *args, **kwargs:

2060

(tcp_server.handle_request

2061

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

3433

2062

3434

2063

logger.debug("Starting main loop")

3435

2064

main_loop.run()

3436

2065

except AvahiError as error:

3437

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

2066

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

3438

2067

cleanup()

3439

2068

sys.exit(1)

3440

2069

except KeyboardInterrupt:

3445

2074

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

3446

2075

cleanup()

3447

2076

3448

3449

2077

if __name__ == '__main__':

3450

2078

main()