/mandos/release : revision 237.7.333

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#!/usr/bin/python

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#!/usr/bin/python2.7

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

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#

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

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

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#

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# Everything else is

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#

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

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

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from future_builtins import *

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import SocketServer as socketserver

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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import cPickle as pickle

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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import gobject

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try:

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import gobject

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except ImportError:

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from gi.repository import GObject as gobject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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import GnuPGInterface

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.5.5"

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if sys.version_info.major == 2:

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str = unicode

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version = "1.6.9"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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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 = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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

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

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return interface_index

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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class PGPEngine(object):

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

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def __init__(self):

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self.gnupg = GnuPGInterface.GnuPG()

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

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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

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'--quiet',

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'--no-use-agent'])

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self.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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def __enter__(self):

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return self

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

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

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with open(os.devnull, "w") as devnull:

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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

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with open(os.devnull, "w") as devnull:

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try:

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

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

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attach_fhs={'stderr': devnull})

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

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f.write(data)

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

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decrypted_plaintext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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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(['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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class AvahiError(Exception):

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

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self.value = value

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

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def __unicode__(self):

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return unicode(repr(self.value))

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

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**kwargs)

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class AvahiServiceError(AvahiError):

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pass

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class AvahiGroupError(AvahiError):

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pass

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

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

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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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bus: dbus.SystemBus()

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"""

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

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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def __init__(self,

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interface = avahi.IF_UNSPEC,

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name = None,

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servicetype = None,

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port = None,

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TXT = None,

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domain = "",

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host = "",

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max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

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self.interface = interface

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self.name = name

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self.type = servicetype

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self):

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def rename(self, remove=True):

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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 = unicode(self.server

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.GetAlternativeServiceName(self.name))

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self.name = str(

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self.server.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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

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self.name)

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self.remove()

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if remove:

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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if (error.get_dbus_name()

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

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

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return self.rename(remove=False)

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else:

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

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self.cleanup()

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os._exit(1)

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def remove(self):

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

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self.rename()

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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unicode(error))

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

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.format(error))

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str(error))

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

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def cleanup(self):

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

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

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

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

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bad_states = { avahi.SERVER_INVALID:

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"Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION:

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"Zeroconf server name collision",

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avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

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bad_states = {

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avahi.SERVER_INVALID: "Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION: "Zeroconf server name collision",

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avahi.SERVER_FAILURE: "Zeroconf server failure",

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}

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if state in bad_states:

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if bad_states[state] is not None:

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if error is None:

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

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self.cleanup()

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elif state == avahi.SERVER_RUNNING:

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self.add()

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try:

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self.add()

400

except dbus.exceptions.DBusException as error:

401

if (error.get_dbus_name()

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

403

logger.info("Local Zeroconf service name"

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" collision.")

405

return self.rename(remove=False)

406

else:

407

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

408

self.cleanup()

409

os._exit(1)

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else:

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if error is None:

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

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422

follow_name_owner_changes=True),

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avahi.DBUS_INTERFACE_SERVER)

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self.server.connect_to_signal("StateChanged",

379

self.server_state_changed)

425

self.server_state_changed)

380

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

381

427

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428

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429

class AvahiServiceToSyslog(AvahiService):

384

def rename(self):

430

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

385

431

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

386

ret = AvahiService.rename(self)

387

syslogger.setFormatter(logging.Formatter

388

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

389

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

390

.format(self.name)))

432

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

433

syslogger.setFormatter(logging.Formatter(

434

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

435

.format(self.name)))

391

436

return ret

392

437

393

394

def timedelta_to_milliseconds(td):

395

"Convert a datetime.timedelta() to milliseconds"

396

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

397

+ (td.seconds * 1000)

398

+ (td.microseconds // 1000))

399

438

def call_pipe(connection, # : multiprocessing.Connection

439

func, *args, **kwargs):

440

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

441

442

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

443

return value on the provided multiprocessing.Connection.

444

"""

445

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

446

connection.close()

400

447

401

448

class Client(object):

402

449

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

429

476

last_checker_status: integer between 0 and 255 reflecting exit

430

477

status of last checker. -1 reflects crashed

431

478

checker, -2 means no checker completed yet.

479

last_checker_signal: The signal which killed the last checker, if

480

last_checker_status is -1

432

481

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

433

482

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

434

483

D-Bus identifiers

439

488

runtime_expansions: Allowed attributes for runtime expansion.

440

489

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

441

490

disabled, or None

491

server_settings: The server_settings dict from main()

442

492

"""

443

493

444

494

runtime_expansions = ("approval_delay", "approval_duration",

446

496

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

447

497

"last_approval_request", "last_checked_ok",

448

498

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

449

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

450

"extended_timeout": "15m",

451

"interval": "2m",

452

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

453

"host": "",

454

"approval_delay": "0s",

455

"approval_duration": "1s",

456

"approved_by_default": "True",

457

"enabled": "True",

458

}

459

460

def timeout_milliseconds(self):

461

"Return the 'timeout' attribute in milliseconds"

462

return timedelta_to_milliseconds(self.timeout)

463

464

def extended_timeout_milliseconds(self):

465

"Return the 'extended_timeout' attribute in milliseconds"

466

return timedelta_to_milliseconds(self.extended_timeout)

467

468

def interval_milliseconds(self):

469

"Return the 'interval' attribute in milliseconds"

470

return timedelta_to_milliseconds(self.interval)

471

472

def approval_delay_milliseconds(self):

473

return timedelta_to_milliseconds(self.approval_delay)

499

client_defaults = {

500

"timeout": "PT5M",

501

"extended_timeout": "PT15M",

502

"interval": "PT2M",

503

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

504

"host": "",

505

"approval_delay": "PT0S",

506

"approval_duration": "PT1S",

507

"approved_by_default": "True",

508

"enabled": "True",

509

}

474

510

475

511

@staticmethod

476

512

def config_parser(config):

492

528

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

493

529

"enabled")

494

530

531

# Uppercase and remove spaces from fingerprint for later

532

# comparison purposes with return value from the

533

# fingerprint() function

495

534

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

496

535

.replace(" ", ""))

497

536

if "secret" in section:

502

541

"rb") as secfile:

503

542

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

504

543

else:

505

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

544

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

506

545

.format(section))

507

546

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

508

547

client["extended_timeout"] = string_to_delta(

519

558

520

559

return settings

521

560

522

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

561

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

523

562

self.name = name

563

if server_settings is None:

564

server_settings = {}

565

self.server_settings = server_settings

524

566

# adding all client settings

525

for setting, value in settings.iteritems():

567

for setting, value in settings.items():

526

568

setattr(self, setting, value)

527

569

528

570

if self.enabled:

536

578

self.expires = None

537

579

538

580

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

539

# Uppercase and remove spaces from fingerprint for later

540

# comparison purposes with return value from the fingerprint()

541

# function

542

581

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

543

582

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

544

583

datetime.datetime.utcnow())

551

590

self.current_checker_command = None

552

591

self.approved = None

553

592

self.approvals_pending = 0

554

self.changedstate = (multiprocessing_manager

555

.Condition(multiprocessing_manager

556

.Lock()))

557

self.client_structure = [attr for attr in

558

self.__dict__.iterkeys()

593

self.changedstate = multiprocessing_manager.Condition(

594

multiprocessing_manager.Lock())

595

self.client_structure = [attr

596

for attr in self.__dict__.iterkeys()

559

597

if not attr.startswith("_")]

560

598

self.client_structure.append("client_structure")

561

599

562

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

563

lambda obj:

564

isinstance(obj,

565

property)):

600

for name, t in inspect.getmembers(

601

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

566

602

if not name.startswith("_"):

567

603

self.client_structure.append(name)

568

604

610

646

# and every interval from then on.

611

647

if self.checker_initiator_tag is not None:

612

648

gobject.source_remove(self.checker_initiator_tag)

613

self.checker_initiator_tag = (gobject.timeout_add

614

(self.interval_milliseconds(),

615

self.start_checker))

649

self.checker_initiator_tag = gobject.timeout_add(

650

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

651

self.start_checker)

616

652

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

617

653

if self.disable_initiator_tag is not None:

618

654

gobject.source_remove(self.disable_initiator_tag)

619

self.disable_initiator_tag = (gobject.timeout_add

620

(self.timeout_milliseconds(),

621

self.disable))

655

self.disable_initiator_tag = gobject.timeout_add(

656

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

622

657

# Also start a new checker *right now*.

623

658

self.start_checker()

624

659

625

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

660

def checker_callback(self, source, condition, connection,

661

command):

626

662

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

627

663

self.checker_callback_tag = None

628

664

self.checker = None

629

if os.WIFEXITED(condition):

630

self.last_checker_status = os.WEXITSTATUS(condition)

665

# Read return code from connection (see call_pipe)

666

returncode = connection.recv()

667

connection.close()

668

669

if returncode >= 0:

670

self.last_checker_status = returncode

671

self.last_checker_signal = None

631

672

if self.last_checker_status == 0:

632

673

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

633

674

vars(self))

634

675

self.checked_ok()

635

676

else:

636

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

637

vars(self))

677

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

638

678

else:

639

679

self.last_checker_status = -1

680

self.last_checker_signal = -returncode

640

681

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

641

682

vars(self))

683

return False

642

684

643

685

def checked_ok(self):

644

686

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

645

687

self.last_checked_ok = datetime.datetime.utcnow()

646

688

self.last_checker_status = 0

689

self.last_checker_signal = None

647

690

self.bump_timeout()

648

691

649

692

def bump_timeout(self, timeout=None):

654

697

gobject.source_remove(self.disable_initiator_tag)

655

698

self.disable_initiator_tag = None

656

699

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

657

self.disable_initiator_tag = (gobject.timeout_add

658

(timedelta_to_milliseconds

659

(timeout), self.disable))

700

self.disable_initiator_tag = gobject.timeout_add(

701

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

660

702

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

661

703

662

704

def need_approval(self):

676

718

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

677

719

# should be.

678

720

679

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

680

try:

681

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

682

except (AttributeError, OSError) as error:

683

if (isinstance(error, OSError)

684

and error.errno != errno.ECHILD):

685

raise error

686

else:

687

if pid:

688

logger.warning("Checker was a zombie")

689

gobject.source_remove(self.checker_callback_tag)

690

self.checker_callback(pid, status,

691

self.current_checker_command)

721

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

722

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

723

self.checker.join()

724

self.checker = None

692

725

# Start a new checker if needed

693

726

if self.checker is None:

694

727

# Escape attributes for the shell

695

escaped_attrs = dict(

696

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

697

for attr in

698

self.runtime_expansions)

728

escaped_attrs = {

729

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

730

for attr in self.runtime_expansions }

699

731

try:

700

732

command = self.checker_command % escaped_attrs

701

733

except TypeError as error:

702

734

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

703

self.checker_command, exc_info=error)

704

return True # Try again later

735

self.checker_command,

736

exc_info=error)

737

return True # Try again later

705

738

self.current_checker_command = command

706

try:

707

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

708

command, self.name)

709

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

710

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

711

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

712

# always replaced by /dev/null.)

713

self.checker = subprocess.Popen(command,

714

close_fds=True,

715

shell=True, cwd="/")

716

except OSError as error:

717

logger.error("Failed to start subprocess",

718

exc_info=error)

719

self.checker_callback_tag = (gobject.child_watch_add

720

(self.checker.pid,

721

self.checker_callback,

722

data=command))

723

# The checker may have completed before the gobject

724

# watch was added. Check for this.

725

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

726

if pid:

727

gobject.source_remove(self.checker_callback_tag)

728

self.checker_callback(pid, status, command)

739

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

740

self.name)

741

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

742

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

743

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

744

# always replaced by /dev/null.)

745

# The exception is when not debugging but nevertheless

746

# running in the foreground; use the previously

747

# created wnull.

748

popen_args = { "close_fds": True,

749

"shell": True,

750

"cwd": "/" }

751

if (not self.server_settings["debug"]

752

and self.server_settings["foreground"]):

753

popen_args.update({"stdout": wnull,

754

"stderr": wnull })

755

pipe = multiprocessing.Pipe(duplex = False)

756

self.checker = multiprocessing.Process(

757

target = call_pipe,

758

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

759

kwargs = popen_args)

760

self.checker.start()

761

self.checker_callback_tag = gobject.io_add_watch(

762

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

763

self.checker_callback, pipe[0], command)

729

764

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

730

765

return True

731

766

737

772

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

738

773

return

739

774

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

740

try:

741

self.checker.terminate()

742

#time.sleep(0.5)

743

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

744

# self.checker.kill()

745

except OSError as error:

746

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

747

raise

775

self.checker.terminate()

748

776

self.checker = None

749

777

750

778

751

def dbus_service_property(dbus_interface, signature="v",

752

access="readwrite", byte_arrays=False):

779

def dbus_service_property(dbus_interface,

780

signature="v",

781

access="readwrite",

782

byte_arrays=False):

753

783

"""Decorators for marking methods of a DBusObjectWithProperties to

754

784

become properties on the D-Bus.

755

785

764

794

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

765

795

if byte_arrays and signature != "ay":

766

796

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

767

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

797

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

798

768

799

def decorator(func):

769

800

func._dbus_is_property = True

770

801

func._dbus_interface = dbus_interface

775

806

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

776

807

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

777

808

return func

809

778

810

return decorator

779

811

780

812

789

821

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

790

822

"false"}

791

823

"""

824

792

825

def decorator(func):

793

826

func._dbus_is_interface = True

794

827

func._dbus_interface = dbus_interface

795

828

func._dbus_name = dbus_interface

796

829

return func

830

797

831

return decorator

798

832

799

833

801

835

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

802

836

Usage:

803

837

838

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

839

"org.freedesktop.DBus.Property."

840

"EmitsChangedSignal": "false"})

804

841

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

805

842

access="r")

806

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

807

"org.freedesktop.DBus.Property."

808

"EmitsChangedSignal": "false"})

809

843

def Property_dbus_property(self):

810

844

return dbus.Boolean(False)

845

846

See also the DBusObjectWithAnnotations class.

811

847

"""

848

812

849

def decorator(func):

813

850

func._dbus_annotations = annotations

814

851

return func

852

815

853

return decorator

816

854

817

855

818

856

class DBusPropertyException(dbus.exceptions.DBusException):

819

857

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

820

858

"""

821

def __unicode__(self):

822

return unicode(str(self))

859

pass

823

860

824

861

825

862

class DBusPropertyAccessException(DBusPropertyException):

834

871

pass

835

872

836

873

837

class DBusObjectWithProperties(dbus.service.Object):

838

"""A D-Bus object with properties.

874

class DBusObjectWithAnnotations(dbus.service.Object):

875

"""A D-Bus object with annotations.

839

876

840

Classes inheriting from this can use the dbus_service_property

841

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

842

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

877

Classes inheriting from this can use the dbus_annotations

878

decorator to add annotations to methods or signals.

843

879

"""

844

880

845

881

@staticmethod

849

885

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

850

886

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

851

887

"""

852

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

888

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

853

889

False)

854

890

855

891

def _get_all_dbus_things(self, thing):

856

892

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

857

893

"""

858

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

859

name),

894

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

860

895

athing.__get__(self))

861

896

for cls in self.__class__.__mro__

862

897

for name, athing in

863

inspect.getmembers(cls,

864

self._is_dbus_thing(thing)))

898

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

899

900

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

901

out_signature = "s",

902

path_keyword = 'object_path',

903

connection_keyword = 'connection')

904

def Introspect(self, object_path, connection):

905

"""Overloading of standard D-Bus method.

906

907

Inserts annotation tags on methods and signals.

908

"""

909

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

910

connection)

911

try:

912

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

913

914

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

915

# Add annotation tags

916

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

917

for tag in if_tag.getElementsByTagName(typ):

918

annots = dict()

919

for name, prop in (self.

920

_get_all_dbus_things(typ)):

921

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

922

and prop._dbus_interface

923

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

924

annots.update(getattr(

925

prop, "_dbus_annotations", {}))

926

for name, value in annots.items():

927

ann_tag = document.createElement(

928

"annotation")

929

ann_tag.setAttribute("name", name)

930

ann_tag.setAttribute("value", value)

931

tag.appendChild(ann_tag)

932

# Add interface annotation tags

933

for annotation, value in dict(

934

itertools.chain.from_iterable(

935

annotations().items()

936

for name, annotations

937

in self._get_all_dbus_things("interface")

938

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

939

)).items():

940

ann_tag = document.createElement("annotation")

941

ann_tag.setAttribute("name", annotation)

942

ann_tag.setAttribute("value", value)

943

if_tag.appendChild(ann_tag)

944

# Fix argument name for the Introspect method itself

945

if (if_tag.getAttribute("name")

946

== dbus.INTROSPECTABLE_IFACE):

947

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

948

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

949

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

950

if (arg.getAttribute("direction")

951

== "out"):

952

arg.setAttribute("name",

953

"xml_data")

954

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

955

document.unlink()

956

except (AttributeError, xml.dom.DOMException,

957

xml.parsers.expat.ExpatError) as error:

958

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

959

exc_info=error)

960

return xmlstring

961

962

963

class DBusObjectWithProperties(DBusObjectWithAnnotations):

964

"""A D-Bus object with properties.

965

966

Classes inheriting from this can use the dbus_service_property

967

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

968

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

969

"""

865

970

866

971

def _get_dbus_property(self, interface_name, property_name):

867

972

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

868

973

property with the specified name and interface.

869

974

"""

870

for cls in self.__class__.__mro__:

871

for name, value in (inspect.getmembers

872

(cls,

873

self._is_dbus_thing("property"))):

975

for cls in self.__class__.__mro__:

976

for name, value in inspect.getmembers(

977

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

874

978

if (value._dbus_name == property_name

875

979

and value._dbus_interface == interface_name):

876

980

return value.__get__(self)

877

981

878

982

# No such property

879

raise DBusPropertyNotFound(self.dbus_object_path + ":"

880

+ interface_name + "."

881

+ property_name)

882

883

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

983

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

984

self.dbus_object_path, interface_name, property_name))

985

986

@classmethod

987

def _get_all_interface_names(cls):

988

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

989

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

990

"_dbus_interface", None)

991

for x in (inspect.getmro(cls))

992

for attr in dir(x))

993

if name is not None)

994

995

@dbus.service.method(dbus.PROPERTIES_IFACE,

996

in_signature="ss",

884

997

out_signature="v")

885

998

def Get(self, interface_name, property_name):

886

999

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

904

1017

# The byte_arrays option is not supported yet on

905

1018

# signatures other than "ay".

906

1019

if prop._dbus_signature != "ay":

907

raise ValueError

1020

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

1021

"'ay' signature {!r}"

1022

.format(prop._dbus_signature))

908

1023

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

909

1024

for byte in value))

910

1025

prop(value)

911

1026

912

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

1027

@dbus.service.method(dbus.PROPERTIES_IFACE,

1028

in_signature="s",

913

1029

out_signature="a{sv}")

914

1030

def GetAll(self, interface_name):

915

1031

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

930

1046

if not hasattr(value, "variant_level"):

931

1047

properties[name] = value

932

1048

continue

933

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

934

value.variant_level+1)

1049

properties[name] = type(value)(

1050

value, variant_level = value.variant_level + 1)

935

1051

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

936

1052

1053

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

1054

def PropertiesChanged(self, interface_name, changed_properties,

1055

invalidated_properties):

1056

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

1057

standard.

1058

"""

1059

pass

1060

937

1061

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

938

1062

out_signature="s",

939

1063

path_keyword='object_path',

943

1067

944

1068

Inserts property tags and interface annotation tags.

945

1069

"""

946

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

947

connection)

1070

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1071

object_path,

1072

connection)

948

1073

try:

949

1074

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

1075

950

1076

def make_tag(document, name, prop):

951

1077

e = document.createElement("property")

952

1078

e.setAttribute("name", name)

953

1079

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

954

1080

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

955

1081

return e

1082

956

1083

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

957

1084

# Add property tags

958

1085

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

961

1088

if prop._dbus_interface

962

1089

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

963

1090

if_tag.appendChild(tag)

964

# Add annotation tags

965

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

966

for tag in if_tag.getElementsByTagName(typ):

967

annots = dict()

968

for name, prop in (self.

969

_get_all_dbus_things(typ)):

970

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

971

and prop._dbus_interface

972

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

973

annots.update(getattr

974

(prop,

975

"_dbus_annotations",

976

{}))

977

for name, value in annots.iteritems():

978

ann_tag = document.createElement(

979

"annotation")

980

ann_tag.setAttribute("name", name)

981

ann_tag.setAttribute("value", value)

982

tag.appendChild(ann_tag)

983

# Add interface annotation tags

984

for annotation, value in dict(

985

itertools.chain.from_iterable(

986

annotations().iteritems()

987

for name, annotations in

988

self._get_all_dbus_things("interface")

989

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

990

)).iteritems():

991

ann_tag = document.createElement("annotation")

992

ann_tag.setAttribute("name", annotation)

993

ann_tag.setAttribute("value", value)

994

if_tag.appendChild(ann_tag)

1091

# Add annotation tags for properties

1092

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

1093

annots = dict()

1094

for name, prop in self._get_all_dbus_things(

1095

"property"):

1096

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

1097

and prop._dbus_interface

1098

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

1099

annots.update(getattr(

1100

prop, "_dbus_annotations", {}))

1101

for name, value in annots.items():

1102

ann_tag = document.createElement(

1103

"annotation")

1104

ann_tag.setAttribute("name", name)

1105

ann_tag.setAttribute("value", value)

1106

tag.appendChild(ann_tag)

995

1107

# Add the names to the return values for the

996

1108

# "org.freedesktop.DBus.Properties" methods

997

1109

if (if_tag.getAttribute("name")

1015

1127

exc_info=error)

1016

1128

return xmlstring

1017

1129

1130

try:

1131

dbus.OBJECT_MANAGER_IFACE

1132

except AttributeError:

1133

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

1134

1135

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1136

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

1137

1138

Classes inheriting from this exposes the standard

1139

GetManagedObjects call and the InterfacesAdded and

1140

InterfacesRemoved signals on the standard

1141

"org.freedesktop.DBus.ObjectManager" interface.

1142

1143

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

1144

manually.

1145

"""

1146

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1147

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

1148

def GetManagedObjects(self):

1149

"""This function must be overridden"""

1150

raise NotImplementedError()

1151

1152

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1153

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

1154

def InterfacesAdded(self, object_path, interfaces_and_properties):

1155

pass

1156

1157

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1158

signature = "oas")

1159

def InterfacesRemoved(self, object_path, interfaces):

1160

pass

1161

1162

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1163

out_signature = "s",

1164

path_keyword = 'object_path',

1165

connection_keyword = 'connection')

1166

def Introspect(self, object_path, connection):

1167

"""Overloading of standard D-Bus method.

1168

1169

Override return argument name of GetManagedObjects to be

1170

"objpath_interfaces_and_properties"

1171

"""

1172

xmlstring = DBusObjectWithAnnotations(self, object_path,

1173

connection)

1174

try:

1175

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

1176

1177

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

1178

# Fix argument name for the GetManagedObjects method

1179

if (if_tag.getAttribute("name")

1180

== dbus.OBJECT_MANAGER_IFACE):

1181

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

1182

if (cn.getAttribute("name")

1183

== "GetManagedObjects"):

1184

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

1185

if (arg.getAttribute("direction")

1186

== "out"):

1187

arg.setAttribute(

1188

"name",

1189

"objpath_interfaces"

1190

"_and_properties")

1191

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

1192

document.unlink()

1193

except (AttributeError, xml.dom.DOMException,

1194

xml.parsers.expat.ExpatError) as error:

1195

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

1196

exc_info = error)

1197

return xmlstring

1018

1198

1019

1199

def datetime_to_dbus(dt, variant_level=0):

1020

1200

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

1021

1201

if dt is None:

1022

1202

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

1023

return dbus.String(dt.isoformat(),

1024

variant_level=variant_level)

1203

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

1025

1204

1026

1205

1027

1206

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1047

1226

(from DBusObjectWithProperties) and interfaces (from the

1048

1227

dbus_interface_annotations decorator).

1049

1228

"""

1229

1050

1230

def wrapper(cls):

1051

1231

for orig_interface_name, alt_interface_name in (

1052

alt_interface_names.iteritems()):

1232

alt_interface_names.items()):

1053

1233

attr = {}

1054

1234

interface_names = set()

1055

1235

# Go though all attributes of the class

1057

1237

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

1058

1238

# with the wrong interface name

1059

1239

if (not hasattr(attribute, "_dbus_interface")

1060

or not attribute._dbus_interface

1061

.startswith(orig_interface_name)):

1240

or not attribute._dbus_interface.startswith(

1241

orig_interface_name)):

1062

1242

continue

1063

1243

# Create an alternate D-Bus interface name based on

1064

1244

# the current name

1065

alt_interface = (attribute._dbus_interface

1066

.replace(orig_interface_name,

1067

alt_interface_name))

1245

alt_interface = attribute._dbus_interface.replace(

1246

orig_interface_name, alt_interface_name)

1068

1247

interface_names.add(alt_interface)

1069

1248

# Is this a D-Bus signal?

1070

1249

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

1071

# Extract the original non-method function by

1072

# black magic

1073

nonmethod_func = (dict(

1250

if sys.version_info.major == 2:

1251

# Extract the original non-method undecorated

1252

# function by black magic

1253

nonmethod_func = (dict(

1074

1254

zip(attribute.func_code.co_freevars,

1075

attribute.__closure__))["func"]

1076

.cell_contents)

1255

attribute.__closure__))

1256

["func"].cell_contents)

1257

else:

1258

nonmethod_func = attribute

1077

1259

# Create a new, but exactly alike, function

1078

1260

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

1079

1261

# with the alternate D-Bus interface name

1080

new_function = (dbus.service.signal

1081

(alt_interface,

1082

attribute._dbus_signature)

1083

(types.FunctionType(

1084

nonmethod_func.func_code,

1085

nonmethod_func.func_globals,

1086

nonmethod_func.func_name,

1087

nonmethod_func.func_defaults,

1088

nonmethod_func.func_closure)))

1262

if sys.version_info.major == 2:

1263

new_function = types.FunctionType(

1264

nonmethod_func.func_code,

1265

nonmethod_func.func_globals,

1266

nonmethod_func.func_name,

1267

nonmethod_func.func_defaults,

1268

nonmethod_func.func_closure)

1269

else:

1270

new_function = types.FunctionType(

1271

nonmethod_func.__code__,

1272

nonmethod_func.__globals__,

1273

nonmethod_func.__name__,

1274

nonmethod_func.__defaults__,

1275

nonmethod_func.__closure__)

1276

new_function = (dbus.service.signal(

1277

alt_interface,

1278

attribute._dbus_signature)(new_function))

1089

1279

# Copy annotations, if any

1090

1280

try:

1091

new_function._dbus_annotations = (

1092

dict(attribute._dbus_annotations))

1281

new_function._dbus_annotations = dict(

1282

attribute._dbus_annotations)

1093

1283

except AttributeError:

1094

1284

pass

1095

1285

# Define a creator of a function to call both the

1100

1290

"""This function is a scope container to pass

1101

1291

func1 and func2 to the "call_both" function

1102

1292

outside of its arguments"""

1293

1103

1294

def call_both(*args, **kwargs):

1104

1295

"""This function will emit two D-Bus

1105

1296

signals by calling func1 and func2"""

1106

1297

func1(*args, **kwargs)

1107

1298

func2(*args, **kwargs)

1299

1108

1300

return call_both

1109

1301

# Create the "call_both" function and add it to

1110

1302

# the class

1115

1307

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

1116

1308

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

1117

1309

# to the class.

1118

attr[attrname] = (dbus.service.method

1119

(alt_interface,

1120

attribute._dbus_in_signature,

1121

attribute._dbus_out_signature)

1122

(types.FunctionType

1123

(attribute.func_code,

1124

attribute.func_globals,

1125

attribute.func_name,

1126

attribute.func_defaults,

1127

attribute.func_closure)))

1310

attr[attrname] = (

1311

dbus.service.method(

1312

alt_interface,

1313

attribute._dbus_in_signature,

1314

attribute._dbus_out_signature)

1315

(types.FunctionType(attribute.func_code,

1316

attribute.func_globals,

1317

attribute.func_name,

1318

attribute.func_defaults,

1319

attribute.func_closure)))

1128

1320

# Copy annotations, if any

1129

1321

try:

1130

attr[attrname]._dbus_annotations = (

1131

dict(attribute._dbus_annotations))

1322

attr[attrname]._dbus_annotations = dict(

1323

attribute._dbus_annotations)

1132

1324

except AttributeError:

1133

1325

pass

1134

1326

# Is this a D-Bus property?

1137

1329

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

1138

1330

# property with the alternate D-Bus interface

1139

1331

# name. Add it to the class.

1140

attr[attrname] = (dbus_service_property

1141

(alt_interface,

1142

attribute._dbus_signature,

1143

attribute._dbus_access,

1144

attribute

1145

._dbus_get_args_options

1146

["byte_arrays"])

1147

(types.FunctionType

1148

(attribute.func_code,

1149

attribute.func_globals,

1150

attribute.func_name,

1151

attribute.func_defaults,

1152

attribute.func_closure)))

1332

attr[attrname] = (dbus_service_property(

1333

alt_interface, attribute._dbus_signature,

1334

attribute._dbus_access,

1335

attribute._dbus_get_args_options

1336

["byte_arrays"])

1337

(types.FunctionType(

1338

attribute.func_code,

1339

attribute.func_globals,

1340

attribute.func_name,

1341

attribute.func_defaults,

1342

attribute.func_closure)))

1153

1343

# Copy annotations, if any

1154

1344

try:

1155

attr[attrname]._dbus_annotations = (

1156

dict(attribute._dbus_annotations))

1345

attr[attrname]._dbus_annotations = dict(

1346

attribute._dbus_annotations)

1157

1347

except AttributeError:

1158

1348

pass

1159

1349

# Is this a D-Bus interface?

1162

1352

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

1163

1353

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

1164

1354

# to the class.

1165

attr[attrname] = (dbus_interface_annotations

1166

(alt_interface)

1167

(types.FunctionType

1168

(attribute.func_code,

1169

attribute.func_globals,

1170

attribute.func_name,

1171

attribute.func_defaults,

1172

attribute.func_closure)))

1355

attr[attrname] = (

1356

dbus_interface_annotations(alt_interface)

1357

(types.FunctionType(attribute.func_code,

1358

attribute.func_globals,

1359

attribute.func_name,

1360

attribute.func_defaults,

1361

attribute.func_closure)))

1173

1362

if deprecate:

1174

1363

# Deprecate all alternate interfaces

1175

iname="_AlternateDBusNames_interface_annotation{0}"

1364

iname="_AlternateDBusNames_interface_annotation{}"

1176

1365

for interface_name in interface_names:

1366

1177

1367

@dbus_interface_annotations(interface_name)

1178

1368

def func(self):

1179

1369

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

1180

"true" }

1370

"true" }

1181

1371

# Find an unused name

1182

1372

for aname in (iname.format(i)

1183

1373

for i in itertools.count()):

1187

1377

if interface_names:

1188

1378

# Replace the class with a new subclass of it with

1189

1379

# methods, signals, etc. as created above.

1190

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

1191

(cls,), attr)

1380

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

1381

(cls, ), attr)

1192

1382

return cls

1383

1193

1384

return wrapper

1194

1385

1195

1386

1196

1387

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

1197

"se.bsnet.fukt.Mandos"})

1388

"se.bsnet.fukt.Mandos"})

1198

1389

class ClientDBus(Client, DBusObjectWithProperties):

1199

1390

"""A Client class using D-Bus

1200

1391

1204

1395

"""

1205

1396

1206

1397

runtime_expansions = (Client.runtime_expansions

1207

+ ("dbus_object_path",))

1398

+ ("dbus_object_path", ))

1399

1400

_interface = "se.recompile.Mandos.Client"

1208

1401

1209

1402

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

1210

1403

1213

1406

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

1214

1407

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

1215

1408

# the D-Bus

1216

client_object_name = unicode(self.name).translate(

1409

client_object_name = str(self.name).translate(

1217

1410

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

1218

1411

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

1219

self.dbus_object_path = (dbus.ObjectPath

1220

("/clients/" + client_object_name))

1412

self.dbus_object_path = dbus.ObjectPath(

1413

"/clients/" + client_object_name)

1221

1414

DBusObjectWithProperties.__init__(self, self.bus,

1222

1415

self.dbus_object_path)

1223

1416

1224

def notifychangeproperty(transform_func,

1225

dbus_name, type_func=lambda x: x,

1226

variant_level=1):

1417

def notifychangeproperty(transform_func, dbus_name,

1418

type_func=lambda x: x,

1419

variant_level=1,

1420

invalidate_only=False,

1421

_interface=_interface):

1227

1422

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

1228

1423

its changes to DBus.

1229

1424

1234

1429

to the D-Bus. Default: no transform

1235

1430

variant_level: D-Bus variant level. Default: 1

1236

1431

"""

1237

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

1432

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

1433

1238

1434

def setter(self, value):

1239

1435

if hasattr(self, "dbus_object_path"):

1240

1436

if (not hasattr(self, attrname) or

1241

1437

type_func(getattr(self, attrname, None))

1242

1438

!= type_func(value)):

1243

dbus_value = transform_func(type_func(value),

1244

variant_level

1245

=variant_level)

1246

self.PropertyChanged(dbus.String(dbus_name),

1247

dbus_value)

1439

if invalidate_only:

1440

self.PropertiesChanged(

1441

_interface, dbus.Dictionary(),

1442

dbus.Array((dbus_name, )))

1443

else:

1444

dbus_value = transform_func(

1445

type_func(value),

1446

variant_level = variant_level)

1447

self.PropertyChanged(dbus.String(dbus_name),

1448

dbus_value)

1449

self.PropertiesChanged(

1450

_interface,

1451

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

1452

dbus_value }),

1453

dbus.Array())

1248

1454

setattr(self, attrname, value)

1249

1455

1250

1456

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

1256

1462

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

1257

1463

last_enabled = notifychangeproperty(datetime_to_dbus,

1258

1464

"LastEnabled")

1259

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

1260

type_func = lambda checker:

1261

checker is not None)

1465

checker = notifychangeproperty(

1466

dbus.Boolean, "CheckerRunning",

1467

type_func = lambda checker: checker is not None)

1262

1468

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1263

1469

"LastCheckedOK")

1264

1470

last_checker_status = notifychangeproperty(dbus.Int16,

1267

1473

datetime_to_dbus, "LastApprovalRequest")

1268

1474

approved_by_default = notifychangeproperty(dbus.Boolean,

1269

1475

"ApprovedByDefault")

1270

approval_delay = notifychangeproperty(dbus.UInt64,

1271

"ApprovalDelay",

1272

type_func =

1273

timedelta_to_milliseconds)

1476

approval_delay = notifychangeproperty(

1477

dbus.UInt64, "ApprovalDelay",

1478

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

1274

1479

approval_duration = notifychangeproperty(

1275

1480

dbus.UInt64, "ApprovalDuration",

1276

type_func = timedelta_to_milliseconds)

1481

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

1277

1482

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

1278

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

1279

type_func =

1280

timedelta_to_milliseconds)

1483

timeout = notifychangeproperty(

1484

dbus.UInt64, "Timeout",

1485

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

1281

1486

extended_timeout = notifychangeproperty(

1282

1487

dbus.UInt64, "ExtendedTimeout",

1283

type_func = timedelta_to_milliseconds)

1284

interval = notifychangeproperty(dbus.UInt64,

1285

"Interval",

1286

type_func =

1287

timedelta_to_milliseconds)

1488

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

1489

interval = notifychangeproperty(

1490

dbus.UInt64, "Interval",

1491

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

1288

1492

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

1493

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

1494

invalidate_only=True)

1289

1495

1290

1496

del notifychangeproperty

1291

1497

1298

1504

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

1299

1505

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

1300

1506

1301

def checker_callback(self, pid, condition, command,

1302

*args, **kwargs):

1303

self.checker_callback_tag = None

1304

self.checker = None

1305

if os.WIFEXITED(condition):

1306

exitstatus = os.WEXITSTATUS(condition)

1507

def checker_callback(self, source, condition,

1508

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

1509

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

1510

connection, command, *args,

1511

**kwargs)

1512

exitstatus = self.last_checker_status

1513

if exitstatus >= 0:

1307

1514

# Emit D-Bus signal

1308

1515

self.CheckerCompleted(dbus.Int16(exitstatus),

1309

dbus.Int64(condition),

1516

# This is specific to GNU libC

1517

dbus.Int64(exitstatus << 8),

1310

1518

dbus.String(command))

1311

1519

else:

1312

1520

# Emit D-Bus signal

1313

1521

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

1314

dbus.Int64(condition),

1522

dbus.Int64(

1523

# This is specific to GNU libC

1524

(exitstatus << 8)

1525

| self.last_checker_signal),

1315

1526

dbus.String(command))

1316

1317

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

1318

*args, **kwargs)

1527

return ret

1319

1528

1320

1529

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

1321

old_checker = self.checker

1322

if self.checker is not None:

1323

old_checker_pid = self.checker.pid

1324

else:

1325

old_checker_pid = None

1530

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

1326

1531

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

1327

1532

# Only if new checker process was started

1328

1533

if (self.checker is not None

1337

1542

1338

1543

def approve(self, value=True):

1339

1544

self.approved = value

1340

gobject.timeout_add(timedelta_to_milliseconds

1341

(self.approval_duration),

1342

self._reset_approved)

1545

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

1546

* 1000), self._reset_approved)

1343

1547

self.send_changedstate()

1344

1548

1345

1549

## D-Bus methods, signals & properties

1346

_interface = "se.recompile.Mandos.Client"

1347

1550

1348

1551

## Interfaces

1349

1552

1350

@dbus_interface_annotations(_interface)

1351

def _foo(self):

1352

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

1353

"false"}

1354

1355

1553

## Signals

1356

1554

1357

1555

# CheckerCompleted - signal

1367

1565

pass

1368

1566

1369

1567

# PropertyChanged - signal

1568

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

1370

1569

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

1371

1570

def PropertyChanged(self, property, value):

1372

1571

"D-Bus signal"

1406

1605

self.checked_ok()

1407

1606

1408

1607

# Enable - method

1608

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

1409

1609

@dbus.service.method(_interface)

1410

1610

def Enable(self):

1411

1611

"D-Bus method"

1412

1612

self.enable()

1413

1613

1414

1614

# StartChecker - method

1615

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

1415

1616

@dbus.service.method(_interface)

1416

1617

def StartChecker(self):

1417

1618

"D-Bus method"

1418

1619

self.start_checker()

1419

1620

1420

1621

# Disable - method

1622

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

1421

1623

@dbus.service.method(_interface)

1422

1624

def Disable(self):

1423

1625

"D-Bus method"

1424

1626

self.disable()

1425

1627

1426

1628

# StopChecker - method

1629

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

1427

1630

@dbus.service.method(_interface)

1428

1631

def StopChecker(self):

1429

1632

self.stop_checker()

1436

1639

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

1437

1640

1438

1641

# ApprovedByDefault - property

1439

@dbus_service_property(_interface, signature="b",

1642

@dbus_service_property(_interface,

1643

signature="b",

1440

1644

access="readwrite")

1441

1645

def ApprovedByDefault_dbus_property(self, value=None):

1442

1646

if value is None: # get

1444

1648

self.approved_by_default = bool(value)

1445

1649

1446

1650

# ApprovalDelay - property

1447

@dbus_service_property(_interface, signature="t",

1651

@dbus_service_property(_interface,

1652

signature="t",

1448

1653

access="readwrite")

1449

1654

def ApprovalDelay_dbus_property(self, value=None):

1450

1655

if value is None: # get

1451

return dbus.UInt64(self.approval_delay_milliseconds())

1656

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

1657

* 1000)

1452

1658

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

1453

1659

1454

1660

# ApprovalDuration - property

1455

@dbus_service_property(_interface, signature="t",

1661

@dbus_service_property(_interface,

1662

signature="t",

1456

1663

access="readwrite")

1457

1664

def ApprovalDuration_dbus_property(self, value=None):

1458

1665

if value is None: # get

1459

return dbus.UInt64(timedelta_to_milliseconds(

1460

self.approval_duration))

1666

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

1667

* 1000)

1461

1668

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

1462

1669

1463

1670

# Name - property

1671

@dbus_annotations(

1672

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

1464

1673

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

1465

1674

def Name_dbus_property(self):

1466

1675

return dbus.String(self.name)

1467

1676

1468

1677

# Fingerprint - property

1678

@dbus_annotations(

1679

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

1469

1680

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

1470

1681

def Fingerprint_dbus_property(self):

1471

1682

return dbus.String(self.fingerprint)

1472

1683

1473

1684

# Host - property

1474

@dbus_service_property(_interface, signature="s",

1685

@dbus_service_property(_interface,

1686

signature="s",

1475

1687

access="readwrite")

1476

1688

def Host_dbus_property(self, value=None):

1477

1689

if value is None: # get

1478

1690

return dbus.String(self.host)

1479

self.host = unicode(value)

1691

self.host = str(value)

1480

1692

1481

1693

# Created - property

1694

@dbus_annotations(

1695

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

1482

1696

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

1483

1697

def Created_dbus_property(self):

1484

1698

return datetime_to_dbus(self.created)

1489

1703

return datetime_to_dbus(self.last_enabled)

1490

1704

1491

1705

# Enabled - property

1492

@dbus_service_property(_interface, signature="b",

1706

@dbus_service_property(_interface,

1707

signature="b",

1493

1708

access="readwrite")

1494

1709

def Enabled_dbus_property(self, value=None):

1495

1710

if value is None: # get

1500

1715

self.disable()

1501

1716

1502

1717

# LastCheckedOK - property

1503

@dbus_service_property(_interface, signature="s",

1718

@dbus_service_property(_interface,

1719

signature="s",

1504

1720

access="readwrite")

1505

1721

def LastCheckedOK_dbus_property(self, value=None):

1506

1722

if value is not None:

1509

1725

return datetime_to_dbus(self.last_checked_ok)

1510

1726

1511

1727

# LastCheckerStatus - property

1512

@dbus_service_property(_interface, signature="n",

1513

access="read")

1728

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

1514

1729

def LastCheckerStatus_dbus_property(self):

1515

1730

return dbus.Int16(self.last_checker_status)

1516

1731

1525

1740

return datetime_to_dbus(self.last_approval_request)

1526

1741

1527

1742

# Timeout - property

1528

@dbus_service_property(_interface, signature="t",

1743

@dbus_service_property(_interface,

1744

signature="t",

1529

1745

access="readwrite")

1530

1746

def Timeout_dbus_property(self, value=None):

1531

1747

if value is None: # get

1532

return dbus.UInt64(self.timeout_milliseconds())

1748

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

1533

1749

old_timeout = self.timeout

1534

1750

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

1535

1751

# Reschedule disabling

1544

1760

is None):

1545

1761

return

1546

1762

gobject.source_remove(self.disable_initiator_tag)

1547

self.disable_initiator_tag = (

1548

gobject.timeout_add(

1549

timedelta_to_milliseconds(self.expires - now),

1550

self.disable))

1763

self.disable_initiator_tag = gobject.timeout_add(

1764

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

1765

self.disable)

1551

1766

1552

1767

# ExtendedTimeout - property

1553

@dbus_service_property(_interface, signature="t",

1768

@dbus_service_property(_interface,

1769

signature="t",

1554

1770

access="readwrite")

1555

1771

def ExtendedTimeout_dbus_property(self, value=None):

1556

1772

if value is None: # get

1557

return dbus.UInt64(self.extended_timeout_milliseconds())

1773

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

1774

* 1000)

1558

1775

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

1559

1776

1560

1777

# Interval - property

1561

@dbus_service_property(_interface, signature="t",

1778

@dbus_service_property(_interface,

1779

signature="t",

1562

1780

access="readwrite")

1563

1781

def Interval_dbus_property(self, value=None):

1564

1782

if value is None: # get

1565

return dbus.UInt64(self.interval_milliseconds())

1783

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

1566

1784

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

1567

1785

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

1568

1786

return

1569

1787

if self.enabled:

1570

1788

# Reschedule checker run

1571

1789

gobject.source_remove(self.checker_initiator_tag)

1572

self.checker_initiator_tag = (gobject.timeout_add

1573

(value, self.start_checker))

1574

self.start_checker() # Start one now, too

1790

self.checker_initiator_tag = gobject.timeout_add(

1791

value, self.start_checker)

1792

self.start_checker() # Start one now, too

1575

1793

1576

1794

# Checker - property

1577

@dbus_service_property(_interface, signature="s",

1795

@dbus_service_property(_interface,

1796

signature="s",

1578

1797

access="readwrite")

1579

1798

def Checker_dbus_property(self, value=None):

1580

1799

if value is None: # get

1581

1800

return dbus.String(self.checker_command)

1582

self.checker_command = unicode(value)

1801

self.checker_command = str(value)

1583

1802

1584

1803

# CheckerRunning - property

1585

@dbus_service_property(_interface, signature="b",

1804

@dbus_service_property(_interface,

1805

signature="b",

1586

1806

access="readwrite")

1587

1807

def CheckerRunning_dbus_property(self, value=None):

1588

1808

if value is None: # get

1593

1813

self.stop_checker()

1594

1814

1595

1815

# ObjectPath - property

1816

@dbus_annotations(

1817

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

1818

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

1596

1819

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

1597

1820

def ObjectPath_dbus_property(self):

1598

1821

return self.dbus_object_path # is already a dbus.ObjectPath

1599

1822

1600

1823

# Secret = property

1601

@dbus_service_property(_interface, signature="ay",

1602

access="write", byte_arrays=True)

1824

@dbus_annotations(

1825

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

1826

"invalidates"})

1827

@dbus_service_property(_interface,

1828

signature="ay",

1829

access="write",

1830

byte_arrays=True)

1603

1831

def Secret_dbus_property(self, value):

1604

self.secret = str(value)

1832

self.secret = bytes(value)

1605

1833

1606

1834

del _interface

1607

1835

1611

1839

self._pipe = child_pipe

1612

1840

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

1613

1841

if not self._pipe.recv():

1614

raise KeyError()

1842

raise KeyError(fpr)

1615

1843

1616

1844

def __getattribute__(self, name):

1617

1845

if name == '_pipe':

1621

1849

if data[0] == 'data':

1622

1850

return data[1]

1623

1851

if data[0] == 'function':

1852

1624

1853

def func(*args, **kwargs):

1625

1854

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

1626

1855

return self._pipe.recv()[1]

1856

1627

1857

return func

1628

1858

1629

1859

def __setattr__(self, name, value):

1641

1871

def handle(self):

1642

1872

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

1643

1873

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

1644

unicode(self.client_address))

1874

str(self.client_address))

1645

1875

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

1646

1876

self.server.child_pipe.fileno())

1647

1877

1648

session = (gnutls.connection

1649

.ClientSession(self.request,

1650

gnutls.connection

1651

.X509Credentials()))

1878

session = gnutls.connection.ClientSession(

1879

self.request, gnutls.connection .X509Credentials())

1652

1880

1653

1881

# Note: gnutls.connection.X509Credentials is really a

1654

1882

# generic GnuTLS certificate credentials object so long as

1663

1891

priority = self.server.gnutls_priority

1664

1892

if priority is None:

1665

1893

priority = "NORMAL"

1666

(gnutls.library.functions

1667

.gnutls_priority_set_direct(session._c_object,

1668

priority, None))

1894

gnutls.library.functions.gnutls_priority_set_direct(

1895

session._c_object, priority, None)

1669

1896

1670

1897

# Start communication using the Mandos protocol

1671

1898

# Get protocol number

1673

1900

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

1674

1901

try:

1675

1902

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

1676

raise RuntimeError

1903

raise RuntimeError(line)

1677

1904

except (ValueError, IndexError, RuntimeError) as error:

1678

1905

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

1679

1906

return

1691

1918

approval_required = False

1692

1919

try:

1693

1920

try:

1694

fpr = self.fingerprint(self.peer_certificate

1695

(session))

1921

fpr = self.fingerprint(

1922

self.peer_certificate(session))

1696

1923

except (TypeError,

1697

1924

gnutls.errors.GNUTLSError) as error:

1698

1925

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

1713

1940

while True:

1714

1941

if not client.enabled:

1715

1942

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

1716

client.name)

1943

client.name)

1717

1944

if self.server.use_dbus:

1718

1945

# Emit D-Bus signal

1719

1946

client.Rejected("Disabled")

1728

1955

if self.server.use_dbus:

1729

1956

# Emit D-Bus signal

1730

1957

client.NeedApproval(

1731

client.approval_delay_milliseconds(),

1732

client.approved_by_default)

1958

client.approval_delay.total_seconds()

1959

* 1000, client.approved_by_default)

1733

1960

else:

1734

1961

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

1735

1962

client.name)

1741

1968

#wait until timeout or approved

1742

1969

time = datetime.datetime.now()

1743

1970

client.changedstate.acquire()

1744

client.changedstate.wait(

1745

float(timedelta_to_milliseconds(delay)

1746

/ 1000))

1971

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

1747

1972

client.changedstate.release()

1748

1973

time2 = datetime.datetime.now()

1749

1974

if (time2 - time) >= delay:

1768

1993

logger.warning("gnutls send failed",

1769

1994

exc_info=error)

1770

1995

return

1771

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

1772

sent, len(client.secret)

1773

- (sent_size + sent))

1996

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

1997

len(client.secret) - (sent_size

1998

+ sent))

1774

1999

sent_size += sent

1775

2000

1776

2001

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

1793

2018

def peer_certificate(session):

1794

2019

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

1795

2020

# If not an OpenPGP certificate...

1796

if (gnutls.library.functions

1797

.gnutls_certificate_type_get(session._c_object)

2021

if (gnutls.library.functions.gnutls_certificate_type_get(

2022

session._c_object)

1798

2023

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1799

2024

# ...do the normal thing

1800

2025

return session.peer_certificate

1814

2039

def fingerprint(openpgp):

1815

2040

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1816

2041

# New GnuTLS "datum" with the OpenPGP public key

1817

datum = (gnutls.library.types

1818

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

1819

ctypes.POINTER

1820

(ctypes.c_ubyte)),

1821

ctypes.c_uint(len(openpgp))))

2042

datum = gnutls.library.types.gnutls_datum_t(

2043

ctypes.cast(ctypes.c_char_p(openpgp),

2044

ctypes.POINTER(ctypes.c_ubyte)),

2045

ctypes.c_uint(len(openpgp)))

1822

2046

# New empty GnuTLS certificate

1823

2047

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1824

(gnutls.library.functions

1825

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2048

gnutls.library.functions.gnutls_openpgp_crt_init(

2049

ctypes.byref(crt))

1826

2050

# Import the OpenPGP public key into the certificate

1827

(gnutls.library.functions

1828

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

1829

gnutls.library.constants

1830

.GNUTLS_OPENPGP_FMT_RAW))

2051

gnutls.library.functions.gnutls_openpgp_crt_import(

2052

crt, ctypes.byref(datum),

2053

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

1831

2054

# Verify the self signature in the key

1832

2055

crtverify = ctypes.c_uint()

1833

(gnutls.library.functions

1834

.gnutls_openpgp_crt_verify_self(crt, 0,

1835

ctypes.byref(crtverify)))

2056

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

2057

crt, 0, ctypes.byref(crtverify))

1836

2058

if crtverify.value != 0:

1837

2059

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1838

raise (gnutls.errors.CertificateSecurityError

1839

("Verify failed"))

2060

raise gnutls.errors.CertificateSecurityError(

2061

"Verify failed")

1840

2062

# New buffer for the fingerprint

1841

2063

buf = ctypes.create_string_buffer(20)

1842

2064

buf_len = ctypes.c_size_t()

1843

2065

# Get the fingerprint from the certificate into the buffer

1844

(gnutls.library.functions

1845

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

1846

ctypes.byref(buf_len)))

2066

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

2067

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

1847

2068

# Deinit the certificate

1848

2069

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1849

2070

# Convert the buffer to a Python bytestring

1855

2076

1856

2077

class MultiprocessingMixIn(object):

1857

2078

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

2079

1858

2080

def sub_process_main(self, request, address):

1859

2081

try:

1860

2082

self.finish_request(request, address)

1872

2094

1873

2095

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1874

2096

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

2097

1875

2098

def process_request(self, request, client_address):

1876

2099

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

1877

2100

1886

2109

1887

2110

def add_pipe(self, parent_pipe, proc):

1888

2111

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

1889

raise NotImplementedError

2112

raise NotImplementedError()

1890

2113

1891

2114

1892

2115

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1898

2121

interface: None or a network interface name (string)

1899

2122

use_ipv6: Boolean; to use IPv6 or not

1900

2123

"""

2124

1901

2125

def __init__(self, server_address, RequestHandlerClass,

1902

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

2126

interface=None,

2127

use_ipv6=True,

2128

socketfd=None):

1903

2129

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

1904

2130

creating a new one with socket.socket().

1905

2131

"""

1946

2172

self.interface)

1947

2173

else:

1948

2174

try:

1949

self.socket.setsockopt(socket.SOL_SOCKET,

1950

SO_BINDTODEVICE,

1951

str(self.interface

1952

+ '\0'))

2175

self.socket.setsockopt(

2176

socket.SOL_SOCKET, SO_BINDTODEVICE,

2177

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

1953

2178

except socket.error as error:

1954

2179

if error.errno == errno.EPERM:

1955

logger.error("No permission to"

1956

" bind to interface %s",

1957

self.interface)

2180

logger.error("No permission to bind to"

2181

" interface %s", self.interface)

1958

2182

elif error.errno == errno.ENOPROTOOPT:

1959

2183

logger.error("SO_BINDTODEVICE not available;"

1960

2184

" cannot bind to interface %s",

1961

2185

self.interface)

1962

2186

elif error.errno == errno.ENODEV:

1963

logger.error("Interface %s does not"

1964

" exist, cannot bind",

1965

self.interface)

2187

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

2188

" cannot bind", self.interface)

1966

2189

else:

1967

2190

raise

1968

2191

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

1971

2194

if self.address_family == socket.AF_INET6:

1972

2195

any_address = "::" # in6addr_any

1973

2196

else:

1974

any_address = socket.INADDR_ANY

2197

any_address = "0.0.0.0" # INADDR_ANY

1975

2198

self.server_address = (any_address,

1976

2199

self.server_address[1])

1977

2200

elif not self.server_address[1]:

1978

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

1979

0)

2201

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

1980

2202

# if self.interface:

1981

2203

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

1982

2204

# 0, # port

1996

2218

1997

2219

Assumes a gobject.MainLoop event loop.

1998

2220

"""

2221

1999

2222

def __init__(self, server_address, RequestHandlerClass,

2000

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

2001

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

2223

interface=None,

2224

use_ipv6=True,

2225

clients=None,

2226

gnutls_priority=None,

2227

use_dbus=True,

2228

socketfd=None):

2002

2229

self.enabled = False

2003

2230

self.clients = clients

2004

2231

if self.clients is None:

2010

2237

interface = interface,

2011

2238

use_ipv6 = use_ipv6,

2012

2239

socketfd = socketfd)

2240

2013

2241

def server_activate(self):

2014

2242

if self.enabled:

2015

2243

return socketserver.TCPServer.server_activate(self)

2019

2247

2020

2248

def add_pipe(self, parent_pipe, proc):

2021

2249

# Call "handle_ipc" for both data and EOF events

2022

gobject.io_add_watch(parent_pipe.fileno(),

2023

gobject.IO_IN | gobject.IO_HUP,

2024

functools.partial(self.handle_ipc,

2025

parent_pipe =

2026

parent_pipe,

2027

proc = proc))

2250

gobject.io_add_watch(

2251

parent_pipe.fileno(),

2252

gobject.IO_IN | gobject.IO_HUP,

2253

functools.partial(self.handle_ipc,

2254

parent_pipe = parent_pipe,

2255

proc = proc))

2028

2256

2029

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

2030

proc = None, client_object=None):

2257

def handle_ipc(self, source, condition,

2258

parent_pipe=None,

2259

proc = None,

2260

client_object=None):

2031

2261

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

2032

2262

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

2033

2263

# Wait for other process to exit

2056

2286

parent_pipe.send(False)

2057

2287

return False

2058

2288

2059

gobject.io_add_watch(parent_pipe.fileno(),

2060

gobject.IO_IN | gobject.IO_HUP,

2061

functools.partial(self.handle_ipc,

2062

parent_pipe =

2063

parent_pipe,

2064

proc = proc,

2065

client_object =

2066

client))

2289

gobject.io_add_watch(

2290

parent_pipe.fileno(),

2291

gobject.IO_IN | gobject.IO_HUP,

2292

functools.partial(self.handle_ipc,

2293

parent_pipe = parent_pipe,

2294

proc = proc,

2295

client_object = client))

2067

2296

parent_pipe.send(True)

2068

2297

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

2069

2298

# same fileno

2075

2304

2076

2305

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

2077

2306

funcname)(*args,

2078

**kwargs)))

2307

**kwargs)))

2079

2308

2080

2309

if command == 'getattr':

2081

2310

attrname = request[1]

2082

if callable(client_object.__getattribute__(attrname)):

2083

parent_pipe.send(('function',))

2311

if isinstance(client_object.__getattribute__(attrname),

2312

collections.Callable):

2313

parent_pipe.send(('function', ))

2084

2314

else:

2085

parent_pipe.send(('data', client_object

2086

.__getattribute__(attrname)))

2315

parent_pipe.send((

2316

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

2087

2317

2088

2318

if command == 'setattr':

2089

2319

attrname = request[1]

2093

2323

return True

2094

2324

2095

2325

2326

def rfc3339_duration_to_delta(duration):

2327

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

2328

2329

>>> rfc3339_duration_to_delta("P7D")

2330

datetime.timedelta(7)

2331

>>> rfc3339_duration_to_delta("PT60S")

2332

datetime.timedelta(0, 60)

2333

>>> rfc3339_duration_to_delta("PT60M")

2334

datetime.timedelta(0, 3600)

2335

>>> rfc3339_duration_to_delta("PT24H")

2336

datetime.timedelta(1)

2337

>>> rfc3339_duration_to_delta("P1W")

2338

datetime.timedelta(7)

2339

>>> rfc3339_duration_to_delta("PT5M30S")

2340

datetime.timedelta(0, 330)

2341

>>> rfc3339_duration_to_delta("P1DT3M20S")

2342

datetime.timedelta(1, 200)

2343

"""

2344

2345

# Parsing an RFC 3339 duration with regular expressions is not

2346

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

2347

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

2348

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

2349

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

2350

# avoid excessive use of external libraries.

2351

2352

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

2353

Token = collections.namedtuple("Token", (

2354

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

2355

# a "group" containing digits

2356

"value", # datetime.timedelta or None

2357

"followers")) # Tokens valid after this token

2358

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

2359

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

2360

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

2361

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

2362

datetime.timedelta(seconds=1),

2363

frozenset((token_end, )))

2364

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

2365

datetime.timedelta(minutes=1),

2366

frozenset((token_second, token_end)))

2367

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

2368

datetime.timedelta(hours=1),

2369

frozenset((token_minute, token_end)))

2370

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

2371

None,

2372

frozenset((token_hour, token_minute,

2373

token_second)))

2374

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

2375

datetime.timedelta(days=1),

2376

frozenset((token_time, token_end)))

2377

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

2378

datetime.timedelta(weeks=4),

2379

frozenset((token_day, token_end)))

2380

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

2381

datetime.timedelta(weeks=52),

2382

frozenset((token_month, token_end)))

2383

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

2384

datetime.timedelta(weeks=1),

2385

frozenset((token_end, )))

2386

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

2387

frozenset((token_year, token_month,

2388

token_day, token_time,

2389

token_week)))

2390

# Define starting values

2391

value = datetime.timedelta() # Value so far

2392

found_token = None

2393

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

2394

s = duration # String left to parse

2395

# Loop until end token is found

2396

while found_token is not token_end:

2397

# Search for any currently valid tokens

2398

for token in followers:

2399

match = token.regexp.match(s)

2400

if match is not None:

2401

# Token found

2402

if token.value is not None:

2403

# Value found, parse digits

2404

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

2405

# Add to value so far

2406

value += factor * token.value

2407

# Strip token from string

2408

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

2409

# Go to found token

2410

found_token = token

2411

# Set valid next tokens

2412

followers = found_token.followers

2413

break

2414

else:

2415

# No currently valid tokens were found

2416

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

2417

.format(duration))

2418

# End token found

2419

return value

2420

2421

2096

2422

def string_to_delta(interval):

2097

2423

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

2098

2424

2109

2435

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

2110

2436

datetime.timedelta(0, 330)

2111

2437

"""

2438

2439

try:

2440

return rfc3339_duration_to_delta(interval)

2441

except ValueError:

2442

pass

2443

2112

2444

timevalue = datetime.timedelta(0)

2113

2445

for s in interval.split():

2114

2446

try:

2115

suffix = unicode(s[-1])

2447

suffix = s[-1]

2116

2448

value = int(s[:-1])

2117

2449

if suffix == "d":

2118

2450

delta = datetime.timedelta(value)

2125

2457

elif suffix == "w":

2126

2458

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

2127

2459

else:

2128

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

2129

.format(suffix))

2130

except (ValueError, IndexError) as e:

2460

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

2461

except IndexError as e:

2131

2462

raise ValueError(*(e.args))

2132

2463

timevalue += delta

2133

2464

return timevalue

2149

2480

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

2150

2481

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

2151

2482

raise OSError(errno.ENODEV,

2152

"{0} not a character device"

2483

"{} not a character device"

2153

2484

.format(os.devnull))

2154

2485

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

2155

2486

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

2165

2496

2166

2497

parser = argparse.ArgumentParser()

2167

2498

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

2168

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

2499

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

2169

2500

help="show version number and exit")

2170

2501

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

2171

2502

help="Bind to interface IF")

2177

2508

help="Run self-test")

2178

2509

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

2179

2510

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

2180

" to terminal")

2511

" to terminal", default=None)

2181

2512

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

2182

2513

help="Debug level for stdout output")

2183

2514

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

2190

2521

" files")

2191

2522

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

2192

2523

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

2193

" system bus interface")

2524

" system bus interface", default=None)

2194

2525

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

2195

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

2526

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

2527

default=None)

2196

2528

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

2197

2529

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

2198

" state")

2530

" state", default=None)

2199

2531

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

2200

2532

help="Specify a file descriptor to a network"

2201

2533

" socket to use instead of creating one")

2202

2534

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

2203

2535

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

2536

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

2537

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

2538

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

2539

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

2540

default=None)

2204

2541

2205

2542

options = parser.parse_args()

2206

2543

2207

2544

if options.check:

2208

2545

import doctest

2209

doctest.testmod()

2210

sys.exit()

2546

fail_count, test_count = doctest.testmod()

2547

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

2211

2548

2212

2549

# Default values for config file for server-global settings

2213

2550

server_defaults = { "interface": "",

2215

2552

"port": "",

2216

2553

"debug": "False",

2217

2554

"priority":

2218

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

2555

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

2556

":+SIGN-DSA-SHA256",

2219

2557

"servicename": "Mandos",

2220

2558

"use_dbus": "True",

2221

2559

"use_ipv6": "True",

2222

2560

"debuglevel": "",

2223

2561

"restore": "True",

2224

2562

"socket": "",

2225

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

2226

}

2563

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

2564

"foreground": "False",

2565

"zeroconf": "True",

2566

}

2227

2567

2228

2568

# Parse config file for server-global settings

2229

2569

server_config = configparser.SafeConfigParser(server_defaults)

2230

2570

del server_defaults

2231

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

2232

"mandos.conf"))

2571

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

2233

2572

# Convert the SafeConfigParser object to a dict

2234

2573

server_settings = server_config.defaults()

2235

2574

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

2236

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

2575

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

2237

2576

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

2238

2577

option)

2239

2578

if server_settings["port"]:

2253

2592

# Override the settings from the config file with command line

2254

2593

# options, if set.

2255

2594

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

2256

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

2257

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

2258

"statedir", "socket"):

2595

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

2596

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

2597

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

2259

2598

value = getattr(options, option)

2260

2599

if value is not None:

2261

2600

server_settings[option] = value

2262

2601

del options

2263

2602

# Force all strings to be unicode

2264

2603

for option in server_settings.keys():

2265

if type(server_settings[option]) is str:

2266

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

2604

if isinstance(server_settings[option], bytes):

2605

server_settings[option] = (server_settings[option]

2606

.decode("utf-8"))

2607

# Force all boolean options to be boolean

2608

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

2609

"foreground", "zeroconf"):

2610

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

2611

# Debug implies foreground

2612

if server_settings["debug"]:

2613

server_settings["foreground"] = True

2267

2614

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

2268

2615

2269

2616

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

2270

2617

2618

if (not server_settings["zeroconf"]

2619

and not (server_settings["port"]

2620

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

2621

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

2622

2271

2623

# For convenience

2272

2624

debug = server_settings["debug"]

2273

2625

debuglevel = server_settings["debuglevel"]

2275

2627

use_ipv6 = server_settings["use_ipv6"]

2276

2628

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

2277

2629

stored_state_file)

2630

foreground = server_settings["foreground"]

2631

zeroconf = server_settings["zeroconf"]

2278

2632

2279

2633

if debug:

2280

2634

initlogger(debug, logging.DEBUG)

2286

2640

initlogger(debug, level)

2287

2641

2288

2642

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

2289

syslogger.setFormatter(logging.Formatter

2290

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

2291

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

2292

.format(server_settings

2293

["servicename"])))

2643

syslogger.setFormatter(

2644

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

2645

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

2646

server_settings["servicename"])))

2294

2647

2295

2648

# Parse config file with clients

2296

2649

client_config = configparser.SafeConfigParser(Client

2301

2654

global mandos_dbus_service

2302

2655

mandos_dbus_service = None

2303

2656

2304

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

2305

server_settings["port"]),

2306

ClientHandler,

2307

interface=(server_settings["interface"]

2308

or None),

2309

use_ipv6=use_ipv6,

2310

gnutls_priority=

2311

server_settings["priority"],

2312

use_dbus=use_dbus,

2313

socketfd=(server_settings["socket"]

2314

or None))

2315

if not debug:

2316

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

2657

socketfd = None

2658

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

2659

socketfd = server_settings["socket"]

2660

tcp_server = MandosServer(

2661

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

2662

ClientHandler,

2663

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

2664

use_ipv6=use_ipv6,

2665

gnutls_priority=server_settings["priority"],

2666

use_dbus=use_dbus,

2667

socketfd=socketfd)

2668

if not foreground:

2669

pidfilename = "/run/mandos.pid"

2670

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

2671

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

2672

pidfile = None

2317

2673

try:

2318

pidfile = open(pidfilename, "w")

2674

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

2319

2675

except IOError as e:

2320

2676

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

2321

2677

exc_info=e)

2335

2691

os.setuid(uid)

2336

2692

except OSError as error:

2337

2693

if error.errno != errno.EPERM:

2338

raise error

2694

raise

2339

2695

2340

2696

if debug:

2341

2697

# Enable all possible GnuTLS debugging

2348

2704

def debug_gnutls(level, string):

2349

2705

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

2350

2706

2351

(gnutls.library.functions

2352

.gnutls_global_set_log_function(debug_gnutls))

2707

gnutls.library.functions.gnutls_global_set_log_function(

2708

debug_gnutls)

2353

2709

2354

2710

# Redirect stdin so all checkers get /dev/null

2355

2711

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

2358

2714

os.close(null)

2359

2715

2360

2716

# Need to fork before connecting to D-Bus

2361

if not debug:

2717

if not foreground:

2362

2718

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

2363

2719

daemon()

2364

2720

2375

2731

if use_dbus:

2376

2732

try:

2377

2733

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

2378

bus, do_not_queue=True)

2379

old_bus_name = (dbus.service.BusName

2380

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

2381

do_not_queue=True))

2382

except dbus.exceptions.NameExistsException as e:

2734

bus,

2735

do_not_queue=True)

2736

old_bus_name = dbus.service.BusName(

2737

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

2738

do_not_queue=True)

2739

except dbus.exceptions.DBusException as e:

2383

2740

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

2384

2741

use_dbus = False

2385

2742

server_settings["use_dbus"] = False

2386

2743

tcp_server.use_dbus = False

2387

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2388

service = AvahiServiceToSyslog(name =

2389

server_settings["servicename"],

2390

servicetype = "_mandos._tcp",

2391

protocol = protocol, bus = bus)

2392

if server_settings["interface"]:

2393

service.interface = (if_nametoindex

2394

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

2744

if zeroconf:

2745

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2746

service = AvahiServiceToSyslog(

2747

name = server_settings["servicename"],

2748

servicetype = "_mandos._tcp",

2749

protocol = protocol,

2750

bus = bus)

2751

if server_settings["interface"]:

2752

service.interface = if_nametoindex(

2753

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

2395

2754

2396

2755

global multiprocessing_manager

2397

2756

multiprocessing_manager = multiprocessing.Manager()

2404

2763

old_client_settings = {}

2405

2764

clients_data = {}

2406

2765

2766

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

2767

global wnull

2768

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

2769

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

2770

# mode

2771

if debug or not foreground:

2772

wnull.close()

2773

2407

2774

# Get client data and settings from last running state.

2408

2775

if server_settings["restore"]:

2409

2776

try:

2410

2777

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

2411

clients_data, old_client_settings = (pickle.load

2412

(stored_state))

2778

clients_data, old_client_settings = pickle.load(

2779

stored_state)

2413

2780

os.remove(stored_state_path)

2414

2781

except IOError as e:

2415

2782

if e.errno == errno.ENOENT:

2416

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

2417

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

2783

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

2784

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

2418

2785

else:

2419

2786

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

2420

2787

exc_info=e)

2421

2788

raise

2422

2789

except EOFError as e:

2423

2790

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

2424

"EOFError:", exc_info=e)

2791

"EOFError:",

2792

exc_info=e)

2425

2793

2426

2794

with PGPEngine() as pgp:

2427

for client_name, client in clients_data.iteritems():

2795

for client_name, client in clients_data.items():

2796

# Skip removed clients

2797

if client_name not in client_settings:

2798

continue

2799

2428

2800

# Decide which value to use after restoring saved state.

2429

2801

# We have three different values: Old config file,

2430

2802

# new config file, and saved state.

2435

2807

# For each value in new config, check if it

2436

2808

# differs from the old config value (Except for

2437

2809

# the "secret" attribute)

2438

if (name != "secret" and

2439

value != old_client_settings[client_name]

2440

[name]):

2810

if (name != "secret"

2811

and (value !=

2812

old_client_settings[client_name][name])):

2441

2813

client[name] = value

2442

2814

except KeyError:

2443

2815

pass

2444

2816

2445

2817

# Clients who has passed its expire date can still be

2446

# enabled if its last checker was successful. Clients

2818

# enabled if its last checker was successful. A Client

2447

2819

# whose checker succeeded before we stored its state is

2448

2820

# assumed to have successfully run all checkers during

2449

2821

# downtime.

2451

2823

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

2452

2824

if not client["last_checked_ok"]:

2453

2825

logger.warning(

2454

"disabling client {0} - Client never "

2455

"performed a successful checker"

2456

.format(client_name))

2826

"disabling client {} - Client never "

2827

"performed a successful checker".format(

2828

client_name))

2457

2829

client["enabled"] = False

2458

2830

elif client["last_checker_status"] != 0:

2459

2831

logger.warning(

2460

"disabling client {0} - Client "

2461

"last checker failed with error code {1}"

2462

.format(client_name,

2463

client["last_checker_status"]))

2832

"disabling client {} - Client last"

2833

" checker failed with error code"

2834

" {}".format(

2835

client_name,

2836

client["last_checker_status"]))

2464

2837

client["enabled"] = False

2465

2838

else:

2466

client["expires"] = (datetime.datetime

2467

.utcnow()

2468

+ client["timeout"])

2839

client["expires"] = (

2840

datetime.datetime.utcnow()

2841

+ client["timeout"])

2469

2842

logger.debug("Last checker succeeded,"

2470

" keeping {0} enabled"

2471

.format(client_name))

2843

" keeping {} enabled".format(

2844

client_name))

2472

2845

try:

2473

client["secret"] = (

2474

pgp.decrypt(client["encrypted_secret"],

2475

client_settings[client_name]

2476

["secret"]))

2846

client["secret"] = pgp.decrypt(

2847

client["encrypted_secret"],

2848

client_settings[client_name]["secret"])

2477

2849

except PGPError:

2478

2850

# If decryption fails, we use secret from new settings

2479

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

2480

.format(client_name))

2481

client["secret"] = (

2482

client_settings[client_name]["secret"])

2851

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

2852

client_name))

2853

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

2854

["secret"])

2483

2855

2484

2856

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

2485

2857

for client_name in (set(old_client_settings)

2490

2862

clients_data[client_name] = client_settings[client_name]

2491

2863

2492

2864

# Create all client objects

2493

for client_name, client in clients_data.iteritems():

2865

for client_name, client in clients_data.items():

2494

2866

tcp_server.clients[client_name] = client_class(

2495

name = client_name, settings = client)

2867

name = client_name,

2868

settings = client,

2869

server_settings = server_settings)

2496

2870

2497

2871

if not tcp_server.clients:

2498

2872

logger.warning("No clients defined")

2499

2873

2500

if not debug:

2501

try:

2502

with pidfile:

2503

pid = os.getpid()

2504

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

2505

del pidfile

2506

except IOError:

2507

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

2508

pidfilename, pid)

2509

except NameError:

2510

# "pidfile" was never created

2511

pass

2874

if not foreground:

2875

if pidfile is not None:

2876

pid = os.getpid()

2877

try:

2878

with pidfile:

2879

print(pid, file=pidfile)

2880

except IOError:

2881

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

2882

pidfilename, pid)

2883

del pidfile

2512

2884

del pidfilename

2513

2885

2514

2886

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

2515

2887

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

2516

2888

2517

2889

if use_dbus:

2518

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

2519

"se.bsnet.fukt.Mandos"})

2520

class MandosDBusService(DBusObjectWithProperties):

2890

2891

@alternate_dbus_interfaces(

2892

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

2893

class MandosDBusService(DBusObjectWithObjectManager):

2521

2894

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

2895

2522

2896

def __init__(self):

2523

2897

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

2898

2524

2899

_interface = "se.recompile.Mandos"

2525

2900

2526

@dbus_interface_annotations(_interface)

2527

def _foo(self):

2528

return { "org.freedesktop.DBus.Property"

2529

".EmitsChangedSignal":

2530

"false"}

2531

2532

2901

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

2533

2902

def ClientAdded(self, objpath):

2534

2903

"D-Bus signal"

2539

2908

"D-Bus signal"

2540

2909

pass

2541

2910

2911

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

2912

"true"})

2542

2913

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

2543

2914

def ClientRemoved(self, objpath, name):

2544

2915

"D-Bus signal"

2545

2916

pass

2546

2917

2918

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

2919

"true"})

2547

2920

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

2548

2921

def GetAllClients(self):

2549

2922

"D-Bus method"

2550

return dbus.Array(c.dbus_object_path

2551

for c in

2923

return dbus.Array(c.dbus_object_path for c in

2552

2924

tcp_server.clients.itervalues())

2553

2925

2926

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

2927

"true"})

2554

2928

@dbus.service.method(_interface,

2555

2929

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

2556

2930

def GetAllClientsWithProperties(self):

2557

2931

"D-Bus method"

2558

2932

return dbus.Dictionary(

2559

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

2560

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

2933

{ c.dbus_object_path: c.GetAll(

2934

"se.recompile.Mandos.Client")

2935

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

2561

2936

signature="oa{sv}")

2562

2937

2563

2938

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

2567

2942

if c.dbus_object_path == object_path:

2568

2943

del tcp_server.clients[c.name]

2569

2944

c.remove_from_connection()

2570

# Don't signal anything except ClientRemoved

2945

# Don't signal the disabling

2571

2946

c.disable(quiet=True)

2572

# Emit D-Bus signal

2573

self.ClientRemoved(object_path, c.name)

2947

# Emit D-Bus signal for removal

2948

self.client_removed_signal(c)

2574

2949

return

2575

2950

raise KeyError(object_path)

2576

2951

2577

2952

del _interface

2953

2954

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

2955

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

2956

def GetManagedObjects(self):

2957

"""D-Bus method"""

2958

return dbus.Dictionary(

2959

{ client.dbus_object_path:

2960

dbus.Dictionary(

2961

{ interface: client.GetAll(interface)

2962

for interface in

2963

client._get_all_interface_names()})

2964

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

2965

2966

def client_added_signal(self, client):

2967

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

2968

if use_dbus:

2969

# New standard signal

2970

self.InterfacesAdded(

2971

client.dbus_object_path,

2972

dbus.Dictionary(

2973

{ interface: client.GetAll(interface)

2974

for interface in

2975

client._get_all_interface_names()}))

2976

# Old signal

2977

self.ClientAdded(client.dbus_object_path)

2978

2979

def client_removed_signal(self, client):

2980

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

2981

if use_dbus:

2982

# New standard signal

2983

self.InterfacesRemoved(

2984

client.dbus_object_path,

2985

client._get_all_interface_names())

2986

# Old signal

2987

self.ClientRemoved(client.dbus_object_path,

2988

client.name)

2578

2989

2579

2990

mandos_dbus_service = MandosDBusService()

2580

2991

2581

2992

def cleanup():

2582

2993

"Cleanup function; run on exit"

2583

service.cleanup()

2994

if zeroconf:

2995

service.cleanup()

2584

2996

2585

2997

multiprocessing.active_children()

2998

wnull.close()

2586

2999

if not (tcp_server.clients or client_settings):

2587

3000

return

2588

3001

2599

3012

2600

3013

# A list of attributes that can not be pickled

2601

3014

# + secret.

2602

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

2603

"checker"))

2604

for name, typ in (inspect.getmembers

2605

(dbus.service.Object)):

3015

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

3016

"checker", "server_settings" }

3017

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

3018

.Object):

2606

3019

exclude.add(name)

2607

3020

2608

3021

client_dict["encrypted_secret"] = (client

2615

3028

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

2616

3029

2617

3030

try:

2618

with (tempfile.NamedTemporaryFile

2619

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

2620

dir=os.path.dirname(stored_state_path),

2621

delete=False)) as stored_state:

3031

with tempfile.NamedTemporaryFile(

3032

mode='wb',

3033

suffix=".pickle",

3034

prefix='clients-',

3035

dir=os.path.dirname(stored_state_path),

3036

delete=False) as stored_state:

2622

3037

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

2623

tempname=stored_state.name

3038

tempname = stored_state.name

2624

3039

os.rename(tempname, stored_state_path)

2625

3040

except (IOError, OSError) as e:

2626

3041

if not debug:

2629

3044

except NameError:

2630

3045

pass

2631

3046

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

2632

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

3047

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

2633

3048

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

2634

3049

else:

2635

3050

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

2636

3051

exc_info=e)

2637

raise e

3052

raise

2638

3053

2639

3054

# Delete all clients, and settings from config

2640

3055

while tcp_server.clients:

2641

3056

name, client = tcp_server.clients.popitem()

2642

3057

if use_dbus:

2643

3058

client.remove_from_connection()

2644

# Don't signal anything except ClientRemoved

3059

# Don't signal the disabling

2645

3060

client.disable(quiet=True)

2646

if use_dbus:

2647

# Emit D-Bus signal

2648

mandos_dbus_service.ClientRemoved(client

2649

.dbus_object_path,

2650

client.name)

3061

# Emit D-Bus signal for removal

3062

mandos_dbus_service.client_removed_signal(client)

2651

3063

client_settings.clear()

2652

3064

2653

3065

atexit.register(cleanup)

2654

3066

2655

3067

for client in tcp_server.clients.itervalues():

2656

3068

if use_dbus:

2657

# Emit D-Bus signal

2658

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3069

# Emit D-Bus signal for adding

3070

mandos_dbus_service.client_added_signal(client)

2659

3071

# Need to initiate checking of clients

2660

3072

if client.enabled:

2661

3073

client.init_checker()

2664

3076

tcp_server.server_activate()

2665

3077

2666

3078

# Find out what port we got

2667

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

3079

if zeroconf:

3080

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

2668

3081

if use_ipv6:

2669

3082

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

2670

3083

" flowinfo %d, scope_id %d",

2676

3089

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

2677

3090

2678

3091

try:

2679

# From the Avahi example code

2680

try:

2681

service.activate()

2682

except dbus.exceptions.DBusException as error:

2683

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

2684

cleanup()

2685

sys.exit(1)

2686

# End of Avahi example code

3092

if zeroconf:

3093

# From the Avahi example code

3094

try:

3095

service.activate()

3096

except dbus.exceptions.DBusException as error:

3097

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

3098

cleanup()

3099

sys.exit(1)

3100

# End of Avahi example code

2687

3101

2688

3102

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

2689

3103

lambda *args, **kwargs:

2704

3118

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

2705

3119

cleanup()

2706

3120

3121

2707

3122

if __name__ == '__main__':

2708

3123

main()