/mandos/release : revision 237.7.686

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#!/usr/bin/python

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

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#

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#

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

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#

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#

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# This program is partly derived from an example program for an Avahi

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# service publisher, downloaded from

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# <http://avahi.org/wiki/PythonPublishExample>. This includes the

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# methods "add", "remove", "server_state_changed",

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# "entry_group_state_changed", "cleanup", and "activate" in the

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

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#

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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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#

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# This file is part of Mandos.

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#

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

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

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# the Free Software Foundation, either version 3 of the License, or

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# (at your option) any later version.

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#

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# This program is distributed in the hope that it will be useful,

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# but WITHOUT ANY WARRANTY; without even the implied warranty of

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# Mandos is distributed in the hope that it will be useful, but

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# WITHOUT ANY WARRANTY; without even the implied warranty of

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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# GNU General Public License for more details.

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#

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#

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# You should have received a copy of the GNU General Public License

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# along with this program. If not, see

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

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#

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# along with Mandos. If not, see <http://www.gnu.org/licenses/>.

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#

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

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#

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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try:

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from future_builtins import *

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except ImportError:

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pass

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import SocketServer as socketserver

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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import cPickle as pickle

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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import gobject

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import avahi

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from gi.repository import GLib

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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import GnuPGInterface

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# Try to find the value of SO_BINDTODEVICE:

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try:

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

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

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except AttributeError:

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try:

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# This is where SO_BINDTODEVICE was up to and including Python

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# 2.6, and also 3.2:

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from IN import SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.5.4"

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

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# Try running the C preprocessor:

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try:

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

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"/dev/stdin"],

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE)

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stdout = cc.communicate(

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

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

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except (OSError, ValueError, IndexError):

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# No value found

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.8.5"

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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 copy_function(func):

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

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility=logging.handlers.SysLogHandler.LOG_DAEMON,

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address="/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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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.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet']

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

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

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

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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topdown=False):

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for filename in files:

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

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for dirname in dirs:

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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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([self.gpg, '--symmetric',

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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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([self.gpg, '--decrypt',

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

272

if proc.returncode != 0:

273

raise PGPError(err)

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return decrypted_plaintext

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# Pretend that we have an Avahi module

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class avahi(object):

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

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

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

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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@staticmethod

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def string_array_to_txt_array(t):

291

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

292

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

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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

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SERVER_INVALID = 0 # avahi-common/defs.h

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SERVER_REGISTERING = 1 # avahi-common/defs.h

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SERVER_RUNNING = 2 # avahi-common/defs.h

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SERVER_COLLISION = 3 # avahi-common/defs.h

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SERVER_FAILURE = 4 # avahi-common/defs.h

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302

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class AvahiError(Exception):

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

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self.value = value

217

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

218

def __unicode__(self):

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return unicode(repr(self.value))

306

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

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**kwargs)

308

220

309

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class AvahiServiceError(AvahiError):

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pass

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312

313

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314

class AvahiGroupError(AvahiError):

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pass

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317

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class AvahiService(object):

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319

"""An Avahi (Zeroconf) service.

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320

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Attributes:

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interface: integer; avahi.IF_UNSPEC or an interface index.

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Used to optionally bind to the specified interface.

234

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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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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

250

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

251

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

252

protocol = avahi.PROTO_UNSPEC, bus = None):

338

339

def __init__(self,

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interface=avahi.IF_UNSPEC,

341

name=None,

342

servicetype=None,

343

port=None,

344

TXT=None,

345

domain="",

346

host="",

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max_renames=32768,

348

protocol=avahi.PROTO_UNSPEC,

349

bus=None):

253

350

self.interface = interface

254

351

self.name = name

255

352

self.type = servicetype

264

361

self.server = None

265

362

self.bus = bus

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363

self.entry_group_state_changed_match = None

267

268

def rename(self):

364

365

def rename(self, remove=True):

269

366

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

270

367

if self.rename_count >= self.max_renames:

271

368

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

272

369

" after %i retries, exiting.",

273

370

self.rename_count)

274

371

raise AvahiServiceError("Too many renames")

275

self.name = unicode(self.server

276

.GetAlternativeServiceName(self.name))

372

self.name = str(

373

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 ...",

278

376

self.name)

279

self.remove()

377

if remove:

378

self.remove()

280

379

try:

281

380

self.add()

282

381

except dbus.exceptions.DBusException as error:

283

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

284

self.cleanup()

285

os._exit(1)

286

self.rename_count += 1

287

382

if (error.get_dbus_name()

383

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

384

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

385

return self.rename(remove=False)

386

else:

387

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

388

self.cleanup()

389

os._exit(1)

390

288

391

def remove(self):

289

392

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

290

393

if self.entry_group_state_changed_match is not None:

292

395

self.entry_group_state_changed_match = None

293

396

if self.group is not None:

294

397

self.group.Reset()

295

398

296

399

def add(self):

297

400

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

298

401

self.remove()

315

418

dbus.UInt16(self.port),

316

419

avahi.string_array_to_txt_array(self.TXT))

317

420

self.group.Commit()

318

421

319

422

def entry_group_state_changed(self, state, error):

320

423

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

321

424

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

322

425

323

426

if state == avahi.ENTRY_GROUP_ESTABLISHED:

324

427

logger.debug("Zeroconf service established.")

325

428

elif state == avahi.ENTRY_GROUP_COLLISION:

327

430

self.rename()

328

431

elif state == avahi.ENTRY_GROUP_FAILURE:

329

432

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

330

unicode(error))

331

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

332

.format(error))

333

433

str(error))

434

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

435

334

436

def cleanup(self):

335

437

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

336

438

if self.group is not None:

341

443

pass

342

444

self.group = None

343

445

self.remove()

344

446

345

447

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

346

448

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

347

449

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

348

bad_states = { avahi.SERVER_INVALID:

349

"Zeroconf server invalid",

350

avahi.SERVER_REGISTERING: None,

351

avahi.SERVER_COLLISION:

352

"Zeroconf server name collision",

353

avahi.SERVER_FAILURE:

354

"Zeroconf server failure" }

450

bad_states = {

451

avahi.SERVER_INVALID: "Zeroconf server invalid",

452

avahi.SERVER_REGISTERING: None,

453

avahi.SERVER_COLLISION: "Zeroconf server name collision",

454

avahi.SERVER_FAILURE: "Zeroconf server failure",

455

}

355

456

if state in bad_states:

356

457

if bad_states[state] is not None:

357

458

if error is None:

360

461

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

361

462

self.cleanup()

362

463

elif state == avahi.SERVER_RUNNING:

363

self.add()

464

try:

465

self.add()

466

except dbus.exceptions.DBusException as error:

467

if (error.get_dbus_name()

468

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

469

logger.info("Local Zeroconf service name"

470

" collision.")

471

return self.rename(remove=False)

472

else:

473

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

474

self.cleanup()

475

os._exit(1)

364

476

else:

365

477

if error is None:

366

478

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

367

479

else:

368

480

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

369

481

370

482

def activate(self):

371

483

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

372

484

if self.server is None:

376

488

follow_name_owner_changes=True),

377

489

avahi.DBUS_INTERFACE_SERVER)

378

490

self.server.connect_to_signal("StateChanged",

379

self.server_state_changed)

491

self.server_state_changed)

380

492

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

381

493

382

494

383

495

class AvahiServiceToSyslog(AvahiService):

384

def rename(self):

496

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

385

497

"""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)))

498

ret = super(AvahiServiceToSyslog, self).rename(*args, **kwargs)

499

syslogger.setFormatter(logging.Formatter(

500

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

501

.format(self.name)))

391

502

return ret

392

503

393

504

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))

505

# Pretend that we have a GnuTLS module

506

class gnutls(object):

507

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

508

509

library = ctypes.util.find_library("gnutls")

510

if library is None:

511

library = ctypes.util.find_library("gnutls-deb0")

512

_library = ctypes.cdll.LoadLibrary(library)

513

del library

514

515

# Unless otherwise indicated, the constants and types below are

516

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

517

518

# Constants

519

E_SUCCESS = 0

520

E_INTERRUPTED = -52

521

E_AGAIN = -28

522

CRT_OPENPGP = 2

523

CRT_RAWPK = 3

524

CLIENT = 2

525

SHUT_RDWR = 0

526

CRD_CERTIFICATE = 1

527

E_NO_CERTIFICATE_FOUND = -49

528

X509_FMT_DER = 0

529

NO_TICKETS = 1<<10

530

ENABLE_RAWPK = 1<<18

531

CTYPE_PEERS = 3

532

KEYID_USE_SHA256 = 1 # gnutls/x509.h

533

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

534

535

# Types

536

class session_int(ctypes.Structure):

537

_fields_ = []

538

session_t = ctypes.POINTER(session_int)

539

540

class certificate_credentials_st(ctypes.Structure):

541

_fields_ = []

542

certificate_credentials_t = ctypes.POINTER(

543

certificate_credentials_st)

544

certificate_type_t = ctypes.c_int

545

546

class datum_t(ctypes.Structure):

547

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

548

('size', ctypes.c_uint)]

549

550

class openpgp_crt_int(ctypes.Structure):

551

_fields_ = []

552

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

553

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

554

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

555

credentials_type_t = ctypes.c_int

556

transport_ptr_t = ctypes.c_void_p

557

close_request_t = ctypes.c_int

558

559

# Exceptions

560

class Error(Exception):

561

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

562

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

563

# code is passed, convert it to a string with

564

# gnutls.strerror()

565

self.code = code

566

if message is None and code is not None:

567

message = gnutls.strerror(code)

568

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

569

message, *args)

570

571

class CertificateSecurityError(Error):

572

pass

573

574

# Classes

575

class Credentials(object):

576

def __init__(self):

577

self._c_object = gnutls.certificate_credentials_t()

578

gnutls.certificate_allocate_credentials(

579

ctypes.byref(self._c_object))

580

self.type = gnutls.CRD_CERTIFICATE

581

582

def __del__(self):

583

gnutls.certificate_free_credentials(self._c_object)

584

585

class ClientSession(object):

586

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

587

self._c_object = gnutls.session_t()

588

gnutls_flags = gnutls.CLIENT

589

if gnutls.check_version(b"3.5.6"):

590

gnutls_flags |= gnutls.NO_TICKETS

591

if gnutls.has_rawpk:

592

gnutls_flags |= gnutls.ENABLE_RAWPK

593

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

594

del gnutls_flags

595

gnutls.set_default_priority(self._c_object)

596

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

597

gnutls.handshake_set_private_extensions(self._c_object,

598

True)

599

self.socket = socket

600

if credentials is None:

601

credentials = gnutls.Credentials()

602

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

603

ctypes.cast(credentials._c_object,

604

ctypes.c_void_p))

605

self.credentials = credentials

606

607

def __del__(self):

608

gnutls.deinit(self._c_object)

609

610

def handshake(self):

611

return gnutls.handshake(self._c_object)

612

613

def send(self, data):

614

data = bytes(data)

615

data_len = len(data)

616

while data_len > 0:

617

data_len -= gnutls.record_send(self._c_object,

618

data[-data_len:],

619

data_len)

620

621

def bye(self):

622

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

623

624

# Error handling functions

625

def _error_code(result):

626

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

627

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

628

if result >= 0:

629

return result

630

if result == gnutls.E_NO_CERTIFICATE_FOUND:

631

raise gnutls.CertificateSecurityError(code=result)

632

raise gnutls.Error(code=result)

633

634

def _retry_on_error(result, func, arguments):

635

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

636

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

637

while result < 0:

638

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

639

return _error_code(result)

640

result = func(*arguments)

641

return result

642

643

# Unless otherwise indicated, the function declarations below are

644

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

645

646

# Functions

647

priority_set_direct = _library.gnutls_priority_set_direct

648

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

649

ctypes.POINTER(ctypes.c_char_p)]

650

priority_set_direct.restype = _error_code

651

652

init = _library.gnutls_init

653

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

654

init.restype = _error_code

655

656

set_default_priority = _library.gnutls_set_default_priority

657

set_default_priority.argtypes = [session_t]

658

set_default_priority.restype = _error_code

659

660

record_send = _library.gnutls_record_send

661

record_send.argtypes = [session_t, ctypes.c_void_p,

662

ctypes.c_size_t]

663

record_send.restype = ctypes.c_ssize_t

664

record_send.errcheck = _retry_on_error

665

666

certificate_allocate_credentials = (

667

_library.gnutls_certificate_allocate_credentials)

668

certificate_allocate_credentials.argtypes = [

669

ctypes.POINTER(certificate_credentials_t)]

670

certificate_allocate_credentials.restype = _error_code

671

672

certificate_free_credentials = (

673

_library.gnutls_certificate_free_credentials)

674

certificate_free_credentials.argtypes = [

675

certificate_credentials_t]

676

certificate_free_credentials.restype = None

677

678

handshake_set_private_extensions = (

679

_library.gnutls_handshake_set_private_extensions)

680

handshake_set_private_extensions.argtypes = [session_t,

681

ctypes.c_int]

682

handshake_set_private_extensions.restype = None

683

684

credentials_set = _library.gnutls_credentials_set

685

credentials_set.argtypes = [session_t, credentials_type_t,

686

ctypes.c_void_p]

687

credentials_set.restype = _error_code

688

689

strerror = _library.gnutls_strerror

690

strerror.argtypes = [ctypes.c_int]

691

strerror.restype = ctypes.c_char_p

692

693

certificate_type_get = _library.gnutls_certificate_type_get

694

certificate_type_get.argtypes = [session_t]

695

certificate_type_get.restype = _error_code

696

697

certificate_get_peers = _library.gnutls_certificate_get_peers

698

certificate_get_peers.argtypes = [session_t,

699

ctypes.POINTER(ctypes.c_uint)]

700

certificate_get_peers.restype = ctypes.POINTER(datum_t)

701

702

global_set_log_level = _library.gnutls_global_set_log_level

703

global_set_log_level.argtypes = [ctypes.c_int]

704

global_set_log_level.restype = None

705

706

global_set_log_function = _library.gnutls_global_set_log_function

707

global_set_log_function.argtypes = [log_func]

708

global_set_log_function.restype = None

709

710

deinit = _library.gnutls_deinit

711

deinit.argtypes = [session_t]

712

deinit.restype = None

713

714

handshake = _library.gnutls_handshake

715

handshake.argtypes = [session_t]

716

handshake.restype = _error_code

717

handshake.errcheck = _retry_on_error

718

719

transport_set_ptr = _library.gnutls_transport_set_ptr

720

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

721

transport_set_ptr.restype = None

722

723

bye = _library.gnutls_bye

724

bye.argtypes = [session_t, close_request_t]

725

bye.restype = _error_code

726

bye.errcheck = _retry_on_error

727

728

check_version = _library.gnutls_check_version

729

check_version.argtypes = [ctypes.c_char_p]

730

check_version.restype = ctypes.c_char_p

731

732

_need_version = b"3.3.0"

733

if check_version(_need_version) is None:

734

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

735

.format(_need_version))

736

737

_tls_rawpk_version = b"3.6.6"

738

has_rawpk = bool(check_version(_tls_rawpk_version))

739

740

if has_rawpk:

741

# Types

742

class pubkey_st(ctypes.Structure):

743

_fields = []

744

pubkey_t = ctypes.POINTER(pubkey_st)

745

746

x509_crt_fmt_t = ctypes.c_int

747

748

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

749

pubkey_init = _library.gnutls_pubkey_init

750

pubkey_init.argtypes = [ctypes.POINTER(pubkey_t)]

751

pubkey_init.restype = _error_code

752

753

pubkey_import = _library.gnutls_pubkey_import

754

pubkey_import.argtypes = [pubkey_t, ctypes.POINTER(datum_t),

755

x509_crt_fmt_t]

756

pubkey_import.restype = _error_code

757

758

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

759

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

760

ctypes.POINTER(ctypes.c_ubyte),

761

ctypes.POINTER(ctypes.c_size_t)]

762

pubkey_get_key_id.restype = _error_code

763

764

pubkey_deinit = _library.gnutls_pubkey_deinit

765

pubkey_deinit.argtypes = [pubkey_t]

766

pubkey_deinit.restype = None

767

else:

768

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

769

770

openpgp_crt_init = _library.gnutls_openpgp_crt_init

771

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

772

openpgp_crt_init.restype = _error_code

773

774

openpgp_crt_import = _library.gnutls_openpgp_crt_import

775

openpgp_crt_import.argtypes = [openpgp_crt_t,

776

ctypes.POINTER(datum_t),

777

openpgp_crt_fmt_t]

778

openpgp_crt_import.restype = _error_code

779

780

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

781

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

782

ctypes.POINTER(ctypes.c_uint)]

783

openpgp_crt_verify_self.restype = _error_code

784

785

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

786

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

787

openpgp_crt_deinit.restype = None

788

789

openpgp_crt_get_fingerprint = (

790

_library.gnutls_openpgp_crt_get_fingerprint)

791

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

792

ctypes.c_void_p,

793

ctypes.POINTER(

794

ctypes.c_size_t)]

795

openpgp_crt_get_fingerprint.restype = _error_code

796

797

if check_version(b"3.6.4"):

798

certificate_type_get2 = _library.gnutls_certificate_type_get2

799

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

800

certificate_type_get2.restype = _error_code

801

802

# Remove non-public functions

803

del _error_code, _retry_on_error

804

805

806

def call_pipe(connection, # : multiprocessing.Connection

807

func, *args, **kwargs):

808

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

809

810

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

811

return value on the provided multiprocessing.Connection.

812

"""

813

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

814

connection.close()

399

815

400

816

401

817

class Client(object):

402

818

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

403

819

404

820

Attributes:

405

821

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

406

822

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

407

823

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

408

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

409

to see if the client lives.

410

'None' if no process is running.

411

checker_callback_tag: a gobject event source tag, or None

824

checker: multiprocessing.Process(); a running checker process used

825

to see if the client lives. 'None' if no process is

826

running.

827

checker_callback_tag: a GLib event source tag, or None

412

828

checker_command: string; External command which is run to check

413

829

if client lives. %() expansions are done at

414

830

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

415

831

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

416

checker_initiator_tag: a gobject event source tag, or None

832

checker_initiator_tag: a GLib event source tag, or None

417

833

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

418

834

client_structure: Object describing what attributes a client has

419

835

and is used for storing the client at exit

420

836

current_checker_command: string; current running checker_command

421

disable_initiator_tag: a gobject event source tag, or None

837

disable_initiator_tag: a GLib event source tag, or None

422

838

enabled: bool()

423

839

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

424

uniquely identify the client

840

uniquely identify an OpenPGP client

841

key_id: string (64 hexadecimal digits); used to uniquely identify

842

a client using raw public keys

425

843

host: string; available for use by the checker command

426

844

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

427

845

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

429

847

last_checker_status: integer between 0 and 255 reflecting exit

430

848

status of last checker. -1 reflects crashed

431

849

checker, -2 means no checker completed yet.

850

last_checker_signal: The signal which killed the last checker, if

851

last_checker_status is -1

432

852

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

433

853

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

434

854

D-Bus identifiers

439

859

runtime_expansions: Allowed attributes for runtime expansion.

440

860

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

441

861

disabled, or None

862

server_settings: The server_settings dict from main()

442

863

"""

443

864

444

865

runtime_expansions = ("approval_delay", "approval_duration",

445

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

866

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

446

867

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

447

868

"last_approval_request", "last_checked_ok",

448

869

"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)

474

870

client_defaults = {

871

"timeout": "PT5M",

872

"extended_timeout": "PT15M",

873

"interval": "PT2M",

874

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

875

"host": "",

876

"approval_delay": "PT0S",

877

"approval_duration": "PT1S",

878

"approved_by_default": "True",

879

"enabled": "True",

880

}

881

475

882

@staticmethod

476

883

def config_parser(config):

477

884

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

484

891

for client_name in config.sections():

485

892

section = dict(config.items(client_name))

486

893

client = settings[client_name] = {}

487

894

488

895

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

489

896

# Reformat values from string types to Python types

490

897

client["approved_by_default"] = config.getboolean(

491

898

client_name, "approved_by_default")

492

899

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

493

900

"enabled")

494

901

902

# Uppercase and remove spaces from key_id and fingerprint

903

# for later comparison purposes with return value from the

904

# key_id() and fingerprint() functions

905

client["key_id"] = (section.get("key_id", "").upper()

906

.replace(" ", ""))

495

907

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

496

908

.replace(" ", ""))

497

909

if "secret" in section:

498

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

910

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

911

.encode("utf-8"),

912

"base64")

499

913

elif "secfile" in section:

500

914

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

501

915

(section["secfile"])),

502

916

"rb") as secfile:

503

917

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

504

918

else:

505

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

919

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

506

920

.format(section))

507

921

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

508

922

client["extended_timeout"] = string_to_delta(

516

930

client["last_approval_request"] = None

517

931

client["last_checked_ok"] = None

518

932

client["last_checker_status"] = -2

519

933

520

934

return settings

521

522

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

935

936

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

523

937

self.name = name

938

if server_settings is None:

939

server_settings = {}

940

self.server_settings = server_settings

524

941

# adding all client settings

525

for setting, value in settings.iteritems():

942

for setting, value in settings.items():

526

943

setattr(self, setting, value)

527

944

528

945

if self.enabled:

529

946

if not hasattr(self, "last_enabled"):

530

947

self.last_enabled = datetime.datetime.utcnow()

534

951

else:

535

952

self.last_enabled = None

536

953

self.expires = None

537

954

538

955

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

956

logger.debug(" Key ID: %s", self.key_id)

542

957

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

543

958

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

544

959

datetime.datetime.utcnow())

545

960

546

961

# attributes specific for this server instance

547

962

self.checker = None

548

963

self.checker_initiator_tag = None

551

966

self.current_checker_command = None

552

967

self.approved = None

553

968

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()

969

self.changedstate = multiprocessing_manager.Condition(

970

multiprocessing_manager.Lock())

971

self.client_structure = [attr

972

for attr in self.__dict__.keys()

559

973

if not attr.startswith("_")]

560

974

self.client_structure.append("client_structure")

561

562

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

563

lambda obj:

564

isinstance(obj,

565

property)):

975

976

for name, t in inspect.getmembers(

977

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

566

978

if not name.startswith("_"):

567

979

self.client_structure.append(name)

568

980

569

981

# Send notice to process children that client state has changed

570

982

def send_changedstate(self):

571

983

with self.changedstate:

572

984

self.changedstate.notify_all()

573

985

574

986

def enable(self):

575

987

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

576

988

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

581

993

self.last_enabled = datetime.datetime.utcnow()

582

994

self.init_checker()

583

995

self.send_changedstate()

584

996

585

997

def disable(self, quiet=True):

586

998

"""Disable this client."""

587

999

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

589

1001

if not quiet:

590

1002

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

591

1003

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

592

gobject.source_remove(self.disable_initiator_tag)

1004

GLib.source_remove(self.disable_initiator_tag)

593

1005

self.disable_initiator_tag = None

594

1006

self.expires = None

595

1007

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

596

gobject.source_remove(self.checker_initiator_tag)

1008

GLib.source_remove(self.checker_initiator_tag)

597

1009

self.checker_initiator_tag = None

598

1010

self.stop_checker()

599

1011

self.enabled = False

600

1012

if not quiet:

601

1013

self.send_changedstate()

602

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

1014

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

603

1015

return False

604

1016

605

1017

def __del__(self):

606

1018

self.disable()

607

1019

608

1020

def init_checker(self):

609

1021

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

610

1022

# and every interval from then on.

611

1023

if self.checker_initiator_tag is not None:

612

gobject.source_remove(self.checker_initiator_tag)

613

self.checker_initiator_tag = (gobject.timeout_add

614

(self.interval_milliseconds(),

615

self.start_checker))

1024

GLib.source_remove(self.checker_initiator_tag)

1025

self.checker_initiator_tag = GLib.timeout_add(

1026

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

1027

self.start_checker)

616

1028

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

617

1029

if self.disable_initiator_tag is not None:

618

gobject.source_remove(self.disable_initiator_tag)

619

self.disable_initiator_tag = (gobject.timeout_add

620

(self.timeout_milliseconds(),

621

self.disable))

1030

GLib.source_remove(self.disable_initiator_tag)

1031

self.disable_initiator_tag = GLib.timeout_add(

1032

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

622

1033

# Also start a new checker *right now*.

623

1034

self.start_checker()

624

625

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

1035

1036

def checker_callback(self, source, condition, connection,

1037

command):

626

1038

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

1039

# Read return code from connection (see call_pipe)

1040

returncode = connection.recv()

1041

connection.close()

1042

self.checker.join()

627

1043

self.checker_callback_tag = None

628

1044

self.checker = None

629

if os.WIFEXITED(condition):

630

self.last_checker_status = os.WEXITSTATUS(condition)

1045

1046

if returncode >= 0:

1047

self.last_checker_status = returncode

1048

self.last_checker_signal = None

631

1049

if self.last_checker_status == 0:

632

1050

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

633

1051

vars(self))

634

1052

self.checked_ok()

635

1053

else:

636

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

637

vars(self))

1054

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

638

1055

else:

639

1056

self.last_checker_status = -1

1057

self.last_checker_signal = -returncode

640

1058

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

641

1059

vars(self))

642

1060

return False

1061

643

1062

def checked_ok(self):

644

1063

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

645

1064

self.last_checked_ok = datetime.datetime.utcnow()

646

1065

self.last_checker_status = 0

1066

self.last_checker_signal = None

647

1067

self.bump_timeout()

648

1068

649

1069

def bump_timeout(self, timeout=None):

650

1070

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

651

1071

if timeout is None:

652

1072

timeout = self.timeout

653

1073

if self.disable_initiator_tag is not None:

654

gobject.source_remove(self.disable_initiator_tag)

1074

GLib.source_remove(self.disable_initiator_tag)

655

1075

self.disable_initiator_tag = None

656

1076

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

657

self.disable_initiator_tag = (gobject.timeout_add

658

(timedelta_to_milliseconds

659

(timeout), self.disable))

1077

self.disable_initiator_tag = GLib.timeout_add(

1078

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

660

1079

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

661

1080

662

1081

def need_approval(self):

663

1082

self.last_approval_request = datetime.datetime.utcnow()

664

1083

665

1084

def start_checker(self):

666

1085

"""Start a new checker subprocess if one is not running.

667

1086

668

1087

If a checker already exists, leave it running and do

669

1088

nothing."""

670

1089

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

675

1094

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

676

1095

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

677

1096

# should be.

678

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)

1097

1098

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

1099

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

1100

self.checker.join()

1101

self.checker = None

692

1102

# Start a new checker if needed

693

1103

if self.checker is None:

694

1104

# 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)

1105

escaped_attrs = {

1106

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

1107

for attr in self.runtime_expansions}

699

1108

try:

700

1109

command = self.checker_command % escaped_attrs

701

1110

except TypeError as error:

702

1111

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

703

self.checker_command, exc_info=error)

704

return True # Try again later

1112

self.checker_command,

1113

exc_info=error)

1114

return True # Try again later

705

1115

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)

729

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

1116

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

1117

self.name)

1118

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

1119

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

1120

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

1121

# always replaced by /dev/null.)

1122

# The exception is when not debugging but nevertheless

1123

# running in the foreground; use the previously

1124

# created wnull.

1125

popen_args = {"close_fds": True,

1126

"shell": True,

1127

"cwd": "/"}

1128

if (not self.server_settings["debug"]

1129

and self.server_settings["foreground"]):

1130

popen_args.update({"stdout": wnull,

1131

"stderr": wnull})

1132

pipe = multiprocessing.Pipe(duplex=False)

1133

self.checker = multiprocessing.Process(

1134

target=call_pipe,

1135

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

1136

kwargs=popen_args)

1137

self.checker.start()

1138

self.checker_callback_tag = GLib.io_add_watch(

1139

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

1140

self.checker_callback, pipe[0], command)

1141

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

730

1142

return True

731

1143

732

1144

def stop_checker(self):

733

1145

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

734

1146

if self.checker_callback_tag:

735

gobject.source_remove(self.checker_callback_tag)

1147

GLib.source_remove(self.checker_callback_tag)

736

1148

self.checker_callback_tag = None

737

1149

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

738

1150

return

739

1151

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

1152

self.checker.terminate()

748

1153

self.checker = None

749

1154

750

1155

751

def dbus_service_property(dbus_interface, signature="v",

752

access="readwrite", byte_arrays=False):

1156

def dbus_service_property(dbus_interface,

1157

signature="v",

1158

access="readwrite",

1159

byte_arrays=False):

753

1160

"""Decorators for marking methods of a DBusObjectWithProperties to

754

1161

become properties on the D-Bus.

755

1162

756

1163

The decorated method will be called with no arguments by "Get"

757

1164

and with one argument by "Set".

758

1165

759

1166

The parameters, where they are supported, are the same as

760

1167

dbus.service.method, except there is only "signature", since the

761

1168

type from Get() and the type sent to Set() is the same.

764

1171

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

765

1172

if byte_arrays and signature != "ay":

766

1173

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

767

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

1174

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

1175

768

1176

def decorator(func):

769

1177

func._dbus_is_property = True

770

1178

func._dbus_interface = dbus_interface

773

1181

func._dbus_name = func.__name__

774

1182

if func._dbus_name.endswith("_dbus_property"):

775

1183

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

776

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1184

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

777

1185

return func

1186

778

1187

return decorator

779

1188

780

1189

781

1190

def dbus_interface_annotations(dbus_interface):

782

1191

"""Decorator for marking functions returning interface annotations

783

1192

784

1193

Usage:

785

1194

786

1195

@dbus_interface_annotations("org.example.Interface")

787

1196

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

788

1197

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

789

1198

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

790

1199

"false"}

791

1200

"""

1201

792

1202

def decorator(func):

793

1203

func._dbus_is_interface = True

794

1204

func._dbus_interface = dbus_interface

795

1205

func._dbus_name = dbus_interface

796

1206

return func

1207

797

1208

return decorator

798

1209

799

1210

800

1211

def dbus_annotations(annotations):

801

1212

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

802

1213

Usage:

803

1214

1215

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

1216

"org.freedesktop.DBus.Property."

1217

"EmitsChangedSignal": "false"})

804

1218

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

805

1219

access="r")

806

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

807

"org.freedesktop.DBus.Property."

808

"EmitsChangedSignal": "false"})

809

1220

def Property_dbus_property(self):

810

1221

return dbus.Boolean(False)

1222

1223

See also the DBusObjectWithAnnotations class.

811

1224

"""

1225

812

1226

def decorator(func):

813

1227

func._dbus_annotations = annotations

814

1228

return func

1229

815

1230

return decorator

816

1231

817

1232

818

1233

class DBusPropertyException(dbus.exceptions.DBusException):

819

1234

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

820

1235

"""

821

def __unicode__(self):

822

return unicode(str(self))

1236

pass

823

1237

824

1238

825

1239

class DBusPropertyAccessException(DBusPropertyException):

834

1248

pass

835

1249

836

1250

837

class DBusObjectWithProperties(dbus.service.Object):

838

"""A D-Bus object with properties.

839

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.

1251

class DBusObjectWithAnnotations(dbus.service.Object):

1252

"""A D-Bus object with annotations.

1253

1254

Classes inheriting from this can use the dbus_annotations

1255

decorator to add annotations to methods or signals.

843

1256

"""

844

1257

845

1258

@staticmethod

846

1259

def _is_dbus_thing(thing):

847

1260

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

848

1261

849

1262

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

850

1263

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

851

1264

"""

852

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

1265

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

853

1266

False)

854

1267

855

1268

def _get_all_dbus_things(self, thing):

856

1269

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

857

1270

"""

858

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

859

name),

1271

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

860

1272

athing.__get__(self))

861

1273

for cls in self.__class__.__mro__

862

1274

for name, athing in

863

inspect.getmembers(cls,

864

self._is_dbus_thing(thing)))

865

1275

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

1276

1277

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1278

out_signature="s",

1279

path_keyword='object_path',

1280

connection_keyword='connection')

1281

def Introspect(self, object_path, connection):

1282

"""Overloading of standard D-Bus method.

1283

1284

Inserts annotation tags on methods and signals.

1285

"""

1286

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

1287

connection)

1288

try:

1289

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

1290

1291

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

1292

# Add annotation tags

1293

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

1294

for tag in if_tag.getElementsByTagName(typ):

1295

annots = dict()

1296

for name, prop in (self.

1297

_get_all_dbus_things(typ)):

1298

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

1299

and prop._dbus_interface

1300

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

1301

annots.update(getattr(

1302

prop, "_dbus_annotations", {}))

1303

for name, value in annots.items():

1304

ann_tag = document.createElement(

1305

"annotation")

1306

ann_tag.setAttribute("name", name)

1307

ann_tag.setAttribute("value", value)

1308

tag.appendChild(ann_tag)

1309

# Add interface annotation tags

1310

for annotation, value in dict(

1311

itertools.chain.from_iterable(

1312

annotations().items()

1313

for name, annotations

1314

in self._get_all_dbus_things("interface")

1315

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

1316

)).items():

1317

ann_tag = document.createElement("annotation")

1318

ann_tag.setAttribute("name", annotation)

1319

ann_tag.setAttribute("value", value)

1320

if_tag.appendChild(ann_tag)

1321

# Fix argument name for the Introspect method itself

1322

if (if_tag.getAttribute("name")

1323

== dbus.INTROSPECTABLE_IFACE):

1324

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

1325

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

1326

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

1327

if (arg.getAttribute("direction")

1328

== "out"):

1329

arg.setAttribute("name",

1330

"xml_data")

1331

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

1332

document.unlink()

1333

except (AttributeError, xml.dom.DOMException,

1334

xml.parsers.expat.ExpatError) as error:

1335

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

1336

exc_info=error)

1337

return xmlstring

1338

1339

1340

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1341

"""A D-Bus object with properties.

1342

1343

Classes inheriting from this can use the dbus_service_property

1344

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

1345

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

1346

"""

1347

866

1348

def _get_dbus_property(self, interface_name, property_name):

867

1349

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

868

1350

property with the specified name and interface.

869

1351

"""

870

for cls in self.__class__.__mro__:

871

for name, value in (inspect.getmembers

872

(cls,

873

self._is_dbus_thing("property"))):

1352

for cls in self.__class__.__mro__:

1353

for name, value in inspect.getmembers(

1354

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

874

1355

if (value._dbus_name == property_name

875

1356

and value._dbus_interface == interface_name):

876

1357

return value.__get__(self)

877

1358

878

1359

# 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",

1360

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

1361

self.dbus_object_path, interface_name, property_name))

1362

1363

@classmethod

1364

def _get_all_interface_names(cls):

1365

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

1366

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

1367

"_dbus_interface", None)

1368

for x in (inspect.getmro(cls))

1369

for attr in dir(x))

1370

if name is not None)

1371

1372

@dbus.service.method(dbus.PROPERTIES_IFACE,

1373

in_signature="ss",

884

1374

out_signature="v")

885

1375

def Get(self, interface_name, property_name):

886

1376

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

892

1382

if not hasattr(value, "variant_level"):

893

1383

return value

894

1384

return type(value)(value, variant_level=value.variant_level+1)

895

1385

896

1386

@dbus.service.method(dbus.PROPERTIES_IFACE, in_signature="ssv")

897

1387

def Set(self, interface_name, property_name, value):

898

1388

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

904

1394

# The byte_arrays option is not supported yet on

905

1395

# signatures other than "ay".

906

1396

if prop._dbus_signature != "ay":

907

raise ValueError

1397

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

1398

"'ay' signature {!r}"

1399

.format(prop._dbus_signature))

908

1400

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

909

1401

for byte in value))

910

1402

prop(value)

911

912

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

1403

1404

@dbus.service.method(dbus.PROPERTIES_IFACE,

1405

in_signature="s",

913

1406

out_signature="a{sv}")

914

1407

def GetAll(self, interface_name):

915

1408

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

916

1409

standard.

917

1410

918

1411

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

919

1412

"""

920

1413

properties = {}

930

1423

if not hasattr(value, "variant_level"):

931

1424

properties[name] = value

932

1425

continue

933

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

934

value.variant_level+1)

1426

properties[name] = type(value)(

1427

value, variant_level=value.variant_level + 1)

935

1428

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

936

1429

1430

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

1431

def PropertiesChanged(self, interface_name, changed_properties,

1432

invalidated_properties):

1433

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

1434

standard.

1435

"""

1436

pass

1437

937

1438

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

938

1439

out_signature="s",

939

1440

path_keyword='object_path',

940

1441

connection_keyword='connection')

941

1442

def Introspect(self, object_path, connection):

942

1443

"""Overloading of standard D-Bus method.

943

1444

944

1445

Inserts property tags and interface annotation tags.

945

1446

"""

946

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

947

connection)

1447

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1448

object_path,

1449

connection)

948

1450

try:

949

1451

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

1452

950

1453

def make_tag(document, name, prop):

951

1454

e = document.createElement("property")

952

1455

e.setAttribute("name", name)

953

1456

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

954

1457

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

955

1458

return e

1459

956

1460

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

957

1461

# Add property tags

958

1462

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

961

1465

if prop._dbus_interface

962

1466

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

963

1467

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)

1468

# Add annotation tags for properties

1469

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

1470

annots = dict()

1471

for name, prop in self._get_all_dbus_things(

1472

"property"):

1473

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

1474

and prop._dbus_interface

1475

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

1476

annots.update(getattr(

1477

prop, "_dbus_annotations", {}))

1478

for name, value in annots.items():

1479

ann_tag = document.createElement(

1480

"annotation")

1481

ann_tag.setAttribute("name", name)

1482

ann_tag.setAttribute("value", value)

1483

tag.appendChild(ann_tag)

995

1484

# Add the names to the return values for the

996

1485

# "org.freedesktop.DBus.Properties" methods

997

1486

if (if_tag.getAttribute("name")

1016

1505

return xmlstring

1017

1506

1018

1507

1508

try:

1509

dbus.OBJECT_MANAGER_IFACE

1510

except AttributeError:

1511

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

1512

1513

1514

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1515

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

1516

1517

Classes inheriting from this exposes the standard

1518

GetManagedObjects call and the InterfacesAdded and

1519

InterfacesRemoved signals on the standard

1520

"org.freedesktop.DBus.ObjectManager" interface.

1521

1522

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

1523

manually.

1524

"""

1525

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1526

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

1527

def GetManagedObjects(self):

1528

"""This function must be overridden"""

1529

raise NotImplementedError()

1530

1531

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1532

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

1533

def InterfacesAdded(self, object_path, interfaces_and_properties):

1534

pass

1535

1536

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

1537

def InterfacesRemoved(self, object_path, interfaces):

1538

pass

1539

1540

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1541

out_signature="s",

1542

path_keyword='object_path',

1543

connection_keyword='connection')

1544

def Introspect(self, object_path, connection):

1545

"""Overloading of standard D-Bus method.

1546

1547

Override return argument name of GetManagedObjects to be

1548

"objpath_interfaces_and_properties"

1549

"""

1550

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1551

object_path,

1552

connection)

1553

try:

1554

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

1555

1556

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

1557

# Fix argument name for the GetManagedObjects method

1558

if (if_tag.getAttribute("name")

1559

== dbus.OBJECT_MANAGER_IFACE):

1560

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

1561

if (cn.getAttribute("name")

1562

== "GetManagedObjects"):

1563

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

1564

if (arg.getAttribute("direction")

1565

== "out"):

1566

arg.setAttribute(

1567

"name",

1568

"objpath_interfaces"

1569

"_and_properties")

1570

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

1571

document.unlink()

1572

except (AttributeError, xml.dom.DOMException,

1573

xml.parsers.expat.ExpatError) as error:

1574

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

1575

exc_info=error)

1576

return xmlstring

1577

1578

1019

1579

def datetime_to_dbus(dt, variant_level=0):

1020

1580

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

1021

1581

if dt is None:

1022

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

1023

return dbus.String(dt.isoformat(),

1024

variant_level=variant_level)

1582

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

1583

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

1025

1584

1026

1585

1027

1586

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1029

1588

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

1030

1589

interface names according to the "alt_interface_names" mapping.

1031

1590

Usage:

1032

1591

1033

1592

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

1034

1593

"net.example.AlternateInterface"})

1035

1594

class SampleDBusObject(dbus.service.Object):

1036

1595

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

1037

1596

def SampleDBusMethod():

1038

1597

pass

1039

1598

1040

1599

The above "SampleDBusMethod" on "SampleDBusObject" will be

1041

1600

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

1042

1601

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

1043

1602

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

1044

1603

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

1045

1604

1046

1605

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

1047

1606

(from DBusObjectWithProperties) and interfaces (from the

1048

1607

dbus_interface_annotations decorator).

1049

1608

"""

1609

1050

1610

def wrapper(cls):

1051

1611

for orig_interface_name, alt_interface_name in (

1052

alt_interface_names.iteritems()):

1612

alt_interface_names.items()):

1053

1613

attr = {}

1054

1614

interface_names = set()

1055

1615

# Go though all attributes of the class

1057

1617

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

1058

1618

# with the wrong interface name

1059

1619

if (not hasattr(attribute, "_dbus_interface")

1060

or not attribute._dbus_interface

1061

.startswith(orig_interface_name)):

1620

or not attribute._dbus_interface.startswith(

1621

orig_interface_name)):

1062

1622

continue

1063

1623

# Create an alternate D-Bus interface name based on

1064

1624

# the current name

1065

alt_interface = (attribute._dbus_interface

1066

.replace(orig_interface_name,

1067

alt_interface_name))

1625

alt_interface = attribute._dbus_interface.replace(

1626

orig_interface_name, alt_interface_name)

1068

1627

interface_names.add(alt_interface)

1069

1628

# Is this a D-Bus signal?

1070

1629

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

1071

# Extract the original non-method function by

1072

# black magic

1073

nonmethod_func = (dict(

1630

# Extract the original non-method undecorated

1631

# function by black magic

1632

if sys.version_info.major == 2:

1633

nonmethod_func = (dict(

1074

1634

zip(attribute.func_code.co_freevars,

1075

attribute.__closure__))["func"]

1076

.cell_contents)

1635

attribute.__closure__))

1636

["func"].cell_contents)

1637

else:

1638

nonmethod_func = (dict(

1639

zip(attribute.__code__.co_freevars,

1640

attribute.__closure__))

1641

["func"].cell_contents)

1077

1642

# Create a new, but exactly alike, function

1078

1643

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

1079

1644

# 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)))

1645

new_function = copy_function(nonmethod_func)

1646

new_function = (dbus.service.signal(

1647

alt_interface,

1648

attribute._dbus_signature)(new_function))

1089

1649

# Copy annotations, if any

1090

1650

try:

1091

new_function._dbus_annotations = (

1092

dict(attribute._dbus_annotations))

1651

new_function._dbus_annotations = dict(

1652

attribute._dbus_annotations)

1093

1653

except AttributeError:

1094

1654

pass

1655

1095

1656

# Define a creator of a function to call both the

1096

1657

# original and alternate functions, so both the

1097

1658

# original and alternate signals gets sent when

1100

1661

"""This function is a scope container to pass

1101

1662

func1 and func2 to the "call_both" function

1102

1663

outside of its arguments"""

1664

1665

@functools.wraps(func2)

1103

1666

def call_both(*args, **kwargs):

1104

1667

"""This function will emit two D-Bus

1105

1668

signals by calling func1 and func2"""

1106

1669

func1(*args, **kwargs)

1107

1670

func2(*args, **kwargs)

1671

# Make wrapper function look like a D-Bus

1672

# signal

1673

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

1674

if name.startswith("_dbus_"):

1675

setattr(call_both, name, attr)

1676

1108

1677

return call_both

1109

1678

# Create the "call_both" function and add it to

1110

1679

# the class

1115

1684

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

1116

1685

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

1117

1686

# 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)))

1687

attr[attrname] = (

1688

dbus.service.method(

1689

alt_interface,

1690

attribute._dbus_in_signature,

1691

attribute._dbus_out_signature)

1692

(copy_function(attribute)))

1128

1693

# Copy annotations, if any

1129

1694

try:

1130

attr[attrname]._dbus_annotations = (

1131

dict(attribute._dbus_annotations))

1695

attr[attrname]._dbus_annotations = dict(

1696

attribute._dbus_annotations)

1132

1697

except AttributeError:

1133

1698

pass

1134

1699

# Is this a D-Bus property?

1137

1702

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

1138

1703

# property with the alternate D-Bus interface

1139

1704

# 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)))

1705

attr[attrname] = (dbus_service_property(

1706

alt_interface, attribute._dbus_signature,

1707

attribute._dbus_access,

1708

attribute._dbus_get_args_options

1709

["byte_arrays"])

1710

(copy_function(attribute)))

1153

1711

# Copy annotations, if any

1154

1712

try:

1155

attr[attrname]._dbus_annotations = (

1156

dict(attribute._dbus_annotations))

1713

attr[attrname]._dbus_annotations = dict(

1714

attribute._dbus_annotations)

1157

1715

except AttributeError:

1158

1716

pass

1159

1717

# Is this a D-Bus interface?

1162

1720

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

1163

1721

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

1164

1722

# 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)))

1723

attr[attrname] = (

1724

dbus_interface_annotations(alt_interface)

1725

(copy_function(attribute)))

1173

1726

if deprecate:

1174

1727

# Deprecate all alternate interfaces

1175

iname="_AlternateDBusNames_interface_annotation{0}"

1728

iname = "_AlternateDBusNames_interface_annotation{}"

1176

1729

for interface_name in interface_names:

1730

1177

1731

@dbus_interface_annotations(interface_name)

1178

1732

def func(self):

1179

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

1180

"true" }

1733

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

1734

"true"}

1181

1735

# Find an unused name

1182

1736

for aname in (iname.format(i)

1183

1737

for i in itertools.count()):

1187

1741

if interface_names:

1188

1742

# Replace the class with a new subclass of it with

1189

1743

# methods, signals, etc. as created above.

1190

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

1191

(cls,), attr)

1744

if sys.version_info.major == 2:

1745

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

1746

(cls, ), attr)

1747

else:

1748

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

1749

(cls, ), attr)

1192

1750

return cls

1751

1193

1752

return wrapper

1194

1753

1195

1754

1196

1755

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

1197

"se.bsnet.fukt.Mandos"})

1756

"se.bsnet.fukt.Mandos"})

1198

1757

class ClientDBus(Client, DBusObjectWithProperties):

1199

1758

"""A Client class using D-Bus

1200

1759

1201

1760

Attributes:

1202

1761

dbus_object_path: dbus.ObjectPath

1203

1762

bus: dbus.SystemBus()

1204

1763

"""

1205

1764

1206

1765

runtime_expansions = (Client.runtime_expansions

1207

+ ("dbus_object_path",))

1208

1766

+ ("dbus_object_path", ))

1767

1768

_interface = "se.recompile.Mandos.Client"

1769

1209

1770

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

1210

1211

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

1771

1772

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

1212

1773

self.bus = bus

1213

1774

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

1214

1775

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

1215

1776

# the D-Bus

1216

client_object_name = unicode(self.name).translate(

1777

client_object_name = str(self.name).translate(

1217

1778

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

1218

1779

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

1219

self.dbus_object_path = (dbus.ObjectPath

1220

("/clients/" + client_object_name))

1780

self.dbus_object_path = dbus.ObjectPath(

1781

"/clients/" + client_object_name)

1221

1782

DBusObjectWithProperties.__init__(self, self.bus,

1222

1783

self.dbus_object_path)

1223

1224

def notifychangeproperty(transform_func,

1225

dbus_name, type_func=lambda x: x,

1226

variant_level=1):

1784

1785

def notifychangeproperty(transform_func, dbus_name,

1786

type_func=lambda x: x,

1787

variant_level=1,

1788

invalidate_only=False,

1789

_interface=_interface):

1227

1790

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

1228

1791

its changes to DBus.

1229

1792

1230

1793

transform_fun: Function that takes a value and a variant_level

1231

1794

and transforms it to a D-Bus type.

1232

1795

dbus_name: D-Bus name of the variable

1234

1797

to the D-Bus. Default: no transform

1235

1798

variant_level: D-Bus variant level. Default: 1

1236

1799

"""

1237

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

1800

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

1801

1238

1802

def setter(self, value):

1239

1803

if hasattr(self, "dbus_object_path"):

1240

1804

if (not hasattr(self, attrname) or

1241

1805

type_func(getattr(self, attrname, None))

1242

1806

!= 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)

1807

if invalidate_only:

1808

self.PropertiesChanged(

1809

_interface, dbus.Dictionary(),

1810

dbus.Array((dbus_name, )))

1811

else:

1812

dbus_value = transform_func(

1813

type_func(value),

1814

variant_level=variant_level)

1815

self.PropertyChanged(dbus.String(dbus_name),

1816

dbus_value)

1817

self.PropertiesChanged(

1818

_interface,

1819

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

1820

dbus_value}),

1821

dbus.Array())

1248

1822

setattr(self, attrname, value)

1249

1823

1250

1824

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

1251

1825

1252

1826

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1253

1827

approvals_pending = notifychangeproperty(dbus.Boolean,

1254

1828

"ApprovalPending",

1255

type_func = bool)

1829

type_func=bool)

1256

1830

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

1257

1831

last_enabled = notifychangeproperty(datetime_to_dbus,

1258

1832

"LastEnabled")

1259

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

1260

type_func = lambda checker:

1261

checker is not None)

1833

checker = notifychangeproperty(

1834

dbus.Boolean, "CheckerRunning",

1835

type_func=lambda checker: checker is not None)

1262

1836

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1263

1837

"LastCheckedOK")

1264

1838

last_checker_status = notifychangeproperty(dbus.Int16,

1267

1841

datetime_to_dbus, "LastApprovalRequest")

1268

1842

approved_by_default = notifychangeproperty(dbus.Boolean,

1269

1843

"ApprovedByDefault")

1270

approval_delay = notifychangeproperty(dbus.UInt64,

1271

"ApprovalDelay",

1272

type_func =

1273

timedelta_to_milliseconds)

1844

approval_delay = notifychangeproperty(

1845

dbus.UInt64, "ApprovalDelay",

1846

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

1274

1847

approval_duration = notifychangeproperty(

1275

1848

dbus.UInt64, "ApprovalDuration",

1276

type_func = timedelta_to_milliseconds)

1849

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

1277

1850

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

1278

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

1279

type_func =

1280

timedelta_to_milliseconds)

1851

timeout = notifychangeproperty(

1852

dbus.UInt64, "Timeout",

1853

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

1281

1854

extended_timeout = notifychangeproperty(

1282

1855

dbus.UInt64, "ExtendedTimeout",

1283

type_func = timedelta_to_milliseconds)

1284

interval = notifychangeproperty(dbus.UInt64,

1285

"Interval",

1286

type_func =

1287

timedelta_to_milliseconds)

1856

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

1857

interval = notifychangeproperty(

1858

dbus.UInt64, "Interval",

1859

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

1288

1860

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

1289

1861

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

1862

invalidate_only=True)

1863

1290

1864

del notifychangeproperty

1291

1865

1292

1866

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

1293

1867

try:

1294

1868

self.remove_from_connection()

1297

1871

if hasattr(DBusObjectWithProperties, "__del__"):

1298

1872

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

1299

1873

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

1300

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)

1874

1875

def checker_callback(self, source, condition,

1876

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

1877

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

1878

connection, command, *args,

1879

**kwargs)

1880

exitstatus = self.last_checker_status

1881

if exitstatus >= 0:

1307

1882

# Emit D-Bus signal

1308

1883

self.CheckerCompleted(dbus.Int16(exitstatus),

1309

dbus.Int64(condition),

1884

# This is specific to GNU libC

1885

dbus.Int64(exitstatus << 8),

1310

1886

dbus.String(command))

1311

1887

else:

1312

1888

# Emit D-Bus signal

1313

1889

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

1314

dbus.Int64(condition),

1890

dbus.Int64(

1891

# This is specific to GNU libC

1892

(exitstatus << 8)

1893

| self.last_checker_signal),

1315

1894

dbus.String(command))

1316

1317

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

1318

*args, **kwargs)

1319

1895

return ret

1896

1320

1897

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

1898

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

1326

1899

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

1327

1900

# Only if new checker process was started

1328

1901

if (self.checker is not None

1330

1903

# Emit D-Bus signal

1331

1904

self.CheckerStarted(self.current_checker_command)

1332

1905

return r

1333

1906

1334

1907

def _reset_approved(self):

1335

1908

self.approved = None

1336

1909

return False

1337

1910

1338

1911

def approve(self, value=True):

1339

1912

self.approved = value

1340

gobject.timeout_add(timedelta_to_milliseconds

1341

(self.approval_duration),

1342

self._reset_approved)

1913

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

1914

* 1000), self._reset_approved)

1343

1915

self.send_changedstate()

1344

1345

## D-Bus methods, signals & properties

1346

_interface = "se.recompile.Mandos.Client"

1347

1348

## Interfaces

1349

1350

@dbus_interface_annotations(_interface)

1351

def _foo(self):

1352

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

1353

"false"}

1354

1355

## Signals

1356

1916

1917

# D-Bus methods, signals & properties

1918

1919

# Interfaces

1920

1921

# Signals

1922

1357

1923

# CheckerCompleted - signal

1358

1924

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

1359

1925

def CheckerCompleted(self, exitcode, waitstatus, command):

1360

1926

"D-Bus signal"

1361

1927

pass

1362

1928

1363

1929

# CheckerStarted - signal

1364

1930

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

1365

1931

def CheckerStarted(self, command):

1366

1932

"D-Bus signal"

1367

1933

pass

1368

1934

1369

1935

# PropertyChanged - signal

1936

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

1370

1937

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

1371

1938

def PropertyChanged(self, property, value):

1372

1939

"D-Bus signal"

1373

1940

pass

1374

1941

1375

1942

# GotSecret - signal

1376

1943

@dbus.service.signal(_interface)

1377

1944

def GotSecret(self):

1380

1947

server to mandos-client

1381

1948

"""

1382

1949

pass

1383

1950

1384

1951

# Rejected - signal

1385

1952

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

1386

1953

def Rejected(self, reason):

1387

1954

"D-Bus signal"

1388

1955

pass

1389

1956

1390

1957

# NeedApproval - signal

1391

1958

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

1392

1959

def NeedApproval(self, timeout, default):

1393

1960

"D-Bus signal"

1394

1961

return self.need_approval()

1395

1396

## Methods

1397

1962

1963

# Methods

1964

1398

1965

# Approve - method

1399

1966

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

1400

1967

def Approve(self, value):

1401

1968

self.approve(value)

1402

1969

1403

1970

# CheckedOK - method

1404

1971

@dbus.service.method(_interface)

1405

1972

def CheckedOK(self):

1406

1973

self.checked_ok()

1407

1974

1408

1975

# Enable - method

1976

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

1409

1977

@dbus.service.method(_interface)

1410

1978

def Enable(self):

1411

1979

"D-Bus method"

1412

1980

self.enable()

1413

1981

1414

1982

# StartChecker - method

1983

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

1415

1984

@dbus.service.method(_interface)

1416

1985

def StartChecker(self):

1417

1986

"D-Bus method"

1418

1987

self.start_checker()

1419

1988

1420

1989

# Disable - method

1990

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

1421

1991

@dbus.service.method(_interface)

1422

1992

def Disable(self):

1423

1993

"D-Bus method"

1424

1994

self.disable()

1425

1995

1426

1996

# StopChecker - method

1997

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

1427

1998

@dbus.service.method(_interface)

1428

1999

def StopChecker(self):

1429

2000

self.stop_checker()

1430

1431

## Properties

1432

2001

2002

# Properties

2003

1433

2004

# ApprovalPending - property

1434

2005

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

1435

2006

def ApprovalPending_dbus_property(self):

1436

2007

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

1437

2008

1438

2009

# ApprovedByDefault - property

1439

@dbus_service_property(_interface, signature="b",

2010

@dbus_service_property(_interface,

2011

signature="b",

1440

2012

access="readwrite")

1441

2013

def ApprovedByDefault_dbus_property(self, value=None):

1442

2014

if value is None: # get

1443

2015

return dbus.Boolean(self.approved_by_default)

1444

2016

self.approved_by_default = bool(value)

1445

2017

1446

2018

# ApprovalDelay - property

1447

@dbus_service_property(_interface, signature="t",

2019

@dbus_service_property(_interface,

2020

signature="t",

1448

2021

access="readwrite")

1449

2022

def ApprovalDelay_dbus_property(self, value=None):

1450

2023

if value is None: # get

1451

return dbus.UInt64(self.approval_delay_milliseconds())

2024

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

2025

* 1000)

1452

2026

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

1453

2027

1454

2028

# ApprovalDuration - property

1455

@dbus_service_property(_interface, signature="t",

2029

@dbus_service_property(_interface,

2030

signature="t",

1456

2031

access="readwrite")

1457

2032

def ApprovalDuration_dbus_property(self, value=None):

1458

2033

if value is None: # get

1459

return dbus.UInt64(timedelta_to_milliseconds(

1460

self.approval_duration))

2034

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

2035

* 1000)

1461

2036

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

1462

2037

1463

2038

# Name - property

2039

@dbus_annotations(

2040

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

1464

2041

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

1465

2042

def Name_dbus_property(self):

1466

2043

return dbus.String(self.name)

1467

2044

2045

# KeyID - property

2046

@dbus_annotations(

2047

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

2048

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

2049

def KeyID_dbus_property(self):

2050

return dbus.String(self.key_id)

2051

1468

2052

# Fingerprint - property

2053

@dbus_annotations(

2054

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

1469

2055

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

1470

2056

def Fingerprint_dbus_property(self):

1471

2057

return dbus.String(self.fingerprint)

1472

2058

1473

2059

# Host - property

1474

@dbus_service_property(_interface, signature="s",

2060

@dbus_service_property(_interface,

2061

signature="s",

1475

2062

access="readwrite")

1476

2063

def Host_dbus_property(self, value=None):

1477

2064

if value is None: # get

1478

2065

return dbus.String(self.host)

1479

self.host = unicode(value)

1480

2066

self.host = str(value)

2067

1481

2068

# Created - property

2069

@dbus_annotations(

2070

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

1482

2071

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

1483

2072

def Created_dbus_property(self):

1484

2073

return datetime_to_dbus(self.created)

1485

2074

1486

2075

# LastEnabled - property

1487

2076

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

1488

2077

def LastEnabled_dbus_property(self):

1489

2078

return datetime_to_dbus(self.last_enabled)

1490

2079

1491

2080

# Enabled - property

1492

@dbus_service_property(_interface, signature="b",

2081

@dbus_service_property(_interface,

2082

signature="b",

1493

2083

access="readwrite")

1494

2084

def Enabled_dbus_property(self, value=None):

1495

2085

if value is None: # get

1498

2088

self.enable()

1499

2089

else:

1500

2090

self.disable()

1501

2091

1502

2092

# LastCheckedOK - property

1503

@dbus_service_property(_interface, signature="s",

2093

@dbus_service_property(_interface,

2094

signature="s",

1504

2095

access="readwrite")

1505

2096

def LastCheckedOK_dbus_property(self, value=None):

1506

2097

if value is not None:

1507

2098

self.checked_ok()

1508

2099

return

1509

2100

return datetime_to_dbus(self.last_checked_ok)

1510

2101

1511

2102

# LastCheckerStatus - property

1512

@dbus_service_property(_interface, signature="n",

1513

access="read")

2103

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

1514

2104

def LastCheckerStatus_dbus_property(self):

1515

2105

return dbus.Int16(self.last_checker_status)

1516

2106

1517

2107

# Expires - property

1518

2108

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

1519

2109

def Expires_dbus_property(self):

1520

2110

return datetime_to_dbus(self.expires)

1521

2111

1522

2112

# LastApprovalRequest - property

1523

2113

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

1524

2114

def LastApprovalRequest_dbus_property(self):

1525

2115

return datetime_to_dbus(self.last_approval_request)

1526

2116

1527

2117

# Timeout - property

1528

@dbus_service_property(_interface, signature="t",

2118

@dbus_service_property(_interface,

2119

signature="t",

1529

2120

access="readwrite")

1530

2121

def Timeout_dbus_property(self, value=None):

1531

2122

if value is None: # get

1532

return dbus.UInt64(self.timeout_milliseconds())

2123

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

1533

2124

old_timeout = self.timeout

1534

2125

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

1535

2126

# Reschedule disabling

1543

2134

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

1544

2135

is None):

1545

2136

return

1546

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))

1551

2137

GLib.source_remove(self.disable_initiator_tag)

2138

self.disable_initiator_tag = GLib.timeout_add(

2139

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

2140

self.disable)

2141

1552

2142

# ExtendedTimeout - property

1553

@dbus_service_property(_interface, signature="t",

2143

@dbus_service_property(_interface,

2144

signature="t",

1554

2145

access="readwrite")

1555

2146

def ExtendedTimeout_dbus_property(self, value=None):

1556

2147

if value is None: # get

1557

return dbus.UInt64(self.extended_timeout_milliseconds())

2148

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

2149

* 1000)

1558

2150

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

1559

2151

1560

2152

# Interval - property

1561

@dbus_service_property(_interface, signature="t",

2153

@dbus_service_property(_interface,

2154

signature="t",

1562

2155

access="readwrite")

1563

2156

def Interval_dbus_property(self, value=None):

1564

2157

if value is None: # get

1565

return dbus.UInt64(self.interval_milliseconds())

2158

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

1566

2159

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

1567

2160

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

1568

2161

return

1569

2162

if self.enabled:

1570

2163

# Reschedule checker run

1571

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

1575

2164

GLib.source_remove(self.checker_initiator_tag)

2165

self.checker_initiator_tag = GLib.timeout_add(

2166

value, self.start_checker)

2167

self.start_checker() # Start one now, too

2168

1576

2169

# Checker - property

1577

@dbus_service_property(_interface, signature="s",

2170

@dbus_service_property(_interface,

2171

signature="s",

1578

2172

access="readwrite")

1579

2173

def Checker_dbus_property(self, value=None):

1580

2174

if value is None: # get

1581

2175

return dbus.String(self.checker_command)

1582

self.checker_command = unicode(value)

1583

2176

self.checker_command = str(value)

2177

1584

2178

# CheckerRunning - property

1585

@dbus_service_property(_interface, signature="b",

2179

@dbus_service_property(_interface,

2180

signature="b",

1586

2181

access="readwrite")

1587

2182

def CheckerRunning_dbus_property(self, value=None):

1588

2183

if value is None: # get

1591

2186

self.start_checker()

1592

2187

else:

1593

2188

self.stop_checker()

1594

2189

1595

2190

# ObjectPath - property

2191

@dbus_annotations(

2192

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

2193

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

1596

2194

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

1597

2195

def ObjectPath_dbus_property(self):

1598

return self.dbus_object_path # is already a dbus.ObjectPath

1599

2196

return self.dbus_object_path # is already a dbus.ObjectPath

2197

1600

2198

# Secret = property

1601

@dbus_service_property(_interface, signature="ay",

1602

access="write", byte_arrays=True)

2199

@dbus_annotations(

2200

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

2201

"invalidates"})

2202

@dbus_service_property(_interface,

2203

signature="ay",

2204

access="write",

2205

byte_arrays=True)

1603

2206

def Secret_dbus_property(self, value):

1604

self.secret = str(value)

1605

2207

self.secret = bytes(value)

2208

1606

2209

del _interface

1607

2210

1608

2211

1609

2212

class ProxyClient(object):

1610

def __init__(self, child_pipe, fpr, address):

2213

def __init__(self, child_pipe, key_id, fpr, address):

1611

2214

self._pipe = child_pipe

1612

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

2215

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

1613

2216

if not self._pipe.recv():

1614

raise KeyError()

1615

2217

raise KeyError(key_id or fpr)

2218

1616

2219

def __getattribute__(self, name):

1617

2220

if name == '_pipe':

1618

2221

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

1621

2224

if data[0] == 'data':

1622

2225

return data[1]

1623

2226

if data[0] == 'function':

2227

1624

2228

def func(*args, **kwargs):

1625

2229

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

1626

2230

return self._pipe.recv()[1]

2231

1627

2232

return func

1628

2233

1629

2234

def __setattr__(self, name, value):

1630

2235

if name == '_pipe':

1631

2236

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

1634

2239

1635

2240

class ClientHandler(socketserver.BaseRequestHandler, object):

1636

2241

"""A class to handle client connections.

1637

2242

1638

2243

Instantiated once for each connection to handle it.

1639

2244

Note: This will run in its own forked process."""

1640

2245

1641

2246

def handle(self):

1642

2247

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

1643

2248

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

1644

unicode(self.client_address))

2249

str(self.client_address))

1645

2250

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

1646

2251

self.server.child_pipe.fileno())

1647

1648

session = (gnutls.connection

1649

.ClientSession(self.request,

1650

gnutls.connection

1651

.X509Credentials()))

1652

1653

# Note: gnutls.connection.X509Credentials is really a

1654

# generic GnuTLS certificate credentials object so long as

1655

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

1656

# here despite using OpenPGP certificates.

1657

1658

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

1659

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

1660

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

1661

# "+DHE-DSS"))

2252

2253

session = gnutls.ClientSession(self.request)

2254

2255

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

2256

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

2257

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

2258

# "+DHE-DSS"))

1662

2259

# Use a fallback default, since this MUST be set.

1663

2260

priority = self.server.gnutls_priority

1664

2261

if priority is None:

1665

2262

priority = "NORMAL"

1666

(gnutls.library.functions

1667

.gnutls_priority_set_direct(session._c_object,

1668

priority, None))

1669

2263

gnutls.priority_set_direct(session._c_object,

2264

priority.encode("utf-8"),

2265

None)

2266

1670

2267

# Start communication using the Mandos protocol

1671

2268

# Get protocol number

1672

2269

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

1673

2270

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

1674

2271

try:

1675

2272

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

1676

raise RuntimeError

2273

raise RuntimeError(line)

1677

2274

except (ValueError, IndexError, RuntimeError) as error:

1678

2275

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

1679

2276

return

1680

2277

1681

2278

# Start GnuTLS connection

1682

2279

try:

1683

2280

session.handshake()

1684

except gnutls.errors.GNUTLSError as error:

2281

except gnutls.Error as error:

1685

2282

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

1686

2283

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

1687

2284

# established. Just abandon the request.

1688

2285

return

1689

2286

logger.debug("Handshake succeeded")

1690

2287

1691

2288

approval_required = False

1692

2289

try:

1693

try:

1694

fpr = self.fingerprint(self.peer_certificate

1695

(session))

1696

except (TypeError,

1697

gnutls.errors.GNUTLSError) as error:

1698

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

1699

return

1700

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

1701

1702

try:

1703

client = ProxyClient(child_pipe, fpr,

2290

if gnutls.has_rawpk:

2291

fpr = b""

2292

try:

2293

key_id = self.key_id(

2294

self.peer_certificate(session))

2295

except (TypeError, gnutls.Error) as error:

2296

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

2297

return

2298

logger.debug("Key ID: %s", key_id)

2299

2300

else:

2301

key_id = b""

2302

try:

2303

fpr = self.fingerprint(

2304

self.peer_certificate(session))

2305

except (TypeError, gnutls.Error) as error:

2306

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

2307

return

2308

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

2309

2310

try:

2311

client = ProxyClient(child_pipe, key_id, fpr,

1704

2312

self.client_address)

1705

2313

except KeyError:

1706

2314

return

1707

2315

1708

2316

if client.approval_delay:

1709

2317

delay = client.approval_delay

1710

2318

client.approvals_pending += 1

1711

2319

approval_required = True

1712

2320

1713

2321

while True:

1714

2322

if not client.enabled:

1715

2323

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

1716

client.name)

2324

client.name)

1717

2325

if self.server.use_dbus:

1718

2326

# Emit D-Bus signal

1719

2327

client.Rejected("Disabled")

1720

2328

return

1721

2329

1722

2330

if client.approved or not client.approval_delay:

1723

#We are approved or approval is disabled

2331

# We are approved or approval is disabled

1724

2332

break

1725

2333

elif client.approved is None:

1726

2334

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

1728

2336

if self.server.use_dbus:

1729

2337

# Emit D-Bus signal

1730

2338

client.NeedApproval(

1731

client.approval_delay_milliseconds(),

1732

client.approved_by_default)

2339

client.approval_delay.total_seconds()

2340

* 1000, client.approved_by_default)

1733

2341

else:

1734

2342

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

1735

2343

client.name)

1737

2345

# Emit D-Bus signal

1738

2346

client.Rejected("Denied")

1739

2347

return

1740

1741

#wait until timeout or approved

2348

2349

# wait until timeout or approved

1742

2350

time = datetime.datetime.now()

1743

2351

client.changedstate.acquire()

1744

client.changedstate.wait(

1745

float(timedelta_to_milliseconds(delay)

1746

/ 1000))

2352

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

1747

2353

client.changedstate.release()

1748

2354

time2 = datetime.datetime.now()

1749

2355

if (time2 - time) >= delay:

1759

2365

break

1760

2366

else:

1761

2367

delay -= time2 - time

1762

1763

sent_size = 0

1764

while sent_size < len(client.secret):

1765

try:

1766

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

1767

except gnutls.errors.GNUTLSError as error:

1768

logger.warning("gnutls send failed",

1769

exc_info=error)

1770

return

1771

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

1772

sent, len(client.secret)

1773

- (sent_size + sent))

1774

sent_size += sent

1775

2368

2369

try:

2370

session.send(client.secret)

2371

except gnutls.Error as error:

2372

logger.warning("gnutls send failed",

2373

exc_info=error)

2374

return

2375

1776

2376

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

1777

2377

# bump the timeout using extended_timeout

1778

2378

client.bump_timeout(client.extended_timeout)

1779

2379

if self.server.use_dbus:

1780

2380

# Emit D-Bus signal

1781

2381

client.GotSecret()

1782

2382

1783

2383

finally:

1784

2384

if approval_required:

1785

2385

client.approvals_pending -= 1

1786

2386

try:

1787

2387

session.bye()

1788

except gnutls.errors.GNUTLSError as error:

2388

except gnutls.Error as error:

1789

2389

logger.warning("GnuTLS bye failed",

1790

2390

exc_info=error)

1791

2391

1792

2392

@staticmethod

1793

2393

def peer_certificate(session):

1794

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

1795

# If not an OpenPGP certificate...

1796

if (gnutls.library.functions

1797

.gnutls_certificate_type_get(session._c_object)

1798

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1799

# ...do the normal thing

1800

return session.peer_certificate

2394

"Return the peer's certificate as a bytestring"

2395

try:

2396

cert_type = gnutls.certificate_type_get2(session._c_object,

2397

gnutls.CTYPE_PEERS)

2398

except AttributeError:

2399

cert_type = gnutls.certificate_type_get(session._c_object)

2400

if gnutls.has_rawpk:

2401

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2402

else:

2403

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2404

# If not a valid certificate type...

2405

if cert_type not in valid_cert_types:

2406

logger.info("Cert type %r not in %r", cert_type,

2407

valid_cert_types)

2408

# ...return invalid data

2409

return b""

1801

2410

list_size = ctypes.c_uint(1)

1802

cert_list = (gnutls.library.functions

1803

.gnutls_certificate_get_peers

2411

cert_list = (gnutls.certificate_get_peers

1804

2412

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

1805

2413

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

1806

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

1807

" certificate")

2414

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

1808

2415

if list_size.value == 0:

1809

2416

return None

1810

2417

cert = cert_list[0]

1811

2418

return ctypes.string_at(cert.data, cert.size)

1812

2419

2420

@staticmethod

2421

def key_id(certificate):

2422

"Convert a certificate bytestring to a hexdigit key ID"

2423

# New GnuTLS "datum" with the public key

2424

datum = gnutls.datum_t(

2425

ctypes.cast(ctypes.c_char_p(certificate),

2426

ctypes.POINTER(ctypes.c_ubyte)),

2427

ctypes.c_uint(len(certificate)))

2428

# XXX all these need to be created in the gnutls "module"

2429

# New empty GnuTLS certificate

2430

pubkey = gnutls.pubkey_t()

2431

gnutls.pubkey_init(ctypes.byref(pubkey))

2432

# Import the raw public key into the certificate

2433

gnutls.pubkey_import(pubkey,

2434

ctypes.byref(datum),

2435

gnutls.X509_FMT_DER)

2436

# New buffer for the key ID

2437

buf = ctypes.create_string_buffer(32)

2438

buf_len = ctypes.c_size_t(len(buf))

2439

# Get the key ID from the raw public key into the buffer

2440

gnutls.pubkey_get_key_id(pubkey,

2441

gnutls.KEYID_USE_SHA256,

2442

ctypes.cast(ctypes.byref(buf),

2443

ctypes.POINTER(ctypes.c_ubyte)),

2444

ctypes.byref(buf_len))

2445

# Deinit the certificate

2446

gnutls.pubkey_deinit(pubkey)

2447

2448

# Convert the buffer to a Python bytestring

2449

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

2450

# Convert the bytestring to hexadecimal notation

2451

hex_key_id = binascii.hexlify(key_id).upper()

2452

return hex_key_id

2453

1813

2454

@staticmethod

1814

2455

def fingerprint(openpgp):

1815

2456

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1816

2457

# 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))))

2458

datum = gnutls.datum_t(

2459

ctypes.cast(ctypes.c_char_p(openpgp),

2460

ctypes.POINTER(ctypes.c_ubyte)),

2461

ctypes.c_uint(len(openpgp)))

1822

2462

# New empty GnuTLS certificate

1823

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1824

(gnutls.library.functions

1825

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2463

crt = gnutls.openpgp_crt_t()

2464

gnutls.openpgp_crt_init(ctypes.byref(crt))

1826

2465

# 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))

2466

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

2467

gnutls.OPENPGP_FMT_RAW)

1831

2468

# Verify the self signature in the key

1832

2469

crtverify = ctypes.c_uint()

1833

(gnutls.library.functions

1834

.gnutls_openpgp_crt_verify_self(crt, 0,

1835

ctypes.byref(crtverify)))

2470

gnutls.openpgp_crt_verify_self(crt, 0,

2471

ctypes.byref(crtverify))

1836

2472

if crtverify.value != 0:

1837

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1838

raise (gnutls.errors.CertificateSecurityError

1839

("Verify failed"))

2473

gnutls.openpgp_crt_deinit(crt)

2474

raise gnutls.CertificateSecurityError(code

2475

=crtverify.value)

1840

2476

# New buffer for the fingerprint

1841

2477

buf = ctypes.create_string_buffer(20)

1842

2478

buf_len = ctypes.c_size_t()

1843

2479

# 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)))

2480

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

2481

ctypes.byref(buf_len))

1847

2482

# Deinit the certificate

1848

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2483

gnutls.openpgp_crt_deinit(crt)

1849

2484

# Convert the buffer to a Python bytestring

1850

2485

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

1851

2486

# Convert the bytestring to hexadecimal notation

1855

2490

1856

2491

class MultiprocessingMixIn(object):

1857

2492

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

2493

1858

2494

def sub_process_main(self, request, address):

1859

2495

try:

1860

2496

self.finish_request(request, address)

1861

2497

except Exception:

1862

2498

self.handle_error(request, address)

1863

2499

self.close_request(request)

1864

2500

1865

2501

def process_request(self, request, address):

1866

2502

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

1867

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

1868

args = (request, address))

2503

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

2504

args=(request, address))

1869

2505

proc.start()

1870

2506

return proc

1871

2507

1872

2508

1873

2509

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1874

2510

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

2511

1875

2512

def process_request(self, request, client_address):

1876

2513

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

1877

2514

1878

2515

This function creates a new pipe in self.pipe

1879

2516

"""

1880

2517

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1881

2518

1882

2519

proc = MultiprocessingMixIn.process_request(self, request,

1883

2520

client_address)

1884

2521

self.child_pipe.close()

1885

2522

self.add_pipe(parent_pipe, proc)

1886

2523

1887

2524

def add_pipe(self, parent_pipe, proc):

1888

2525

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

1889

raise NotImplementedError

2526

raise NotImplementedError()

1890

2527

1891

2528

1892

2529

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1893

2530

socketserver.TCPServer, object):

1894

2531

"""IPv6-capable TCP server. Accepts 'None' as address and/or port

1895

2532

1896

2533

Attributes:

1897

2534

enabled: Boolean; whether this server is activated yet

1898

2535

interface: None or a network interface name (string)

1899

2536

use_ipv6: Boolean; to use IPv6 or not

1900

2537

"""

2538

1901

2539

def __init__(self, server_address, RequestHandlerClass,

1902

interface=None, use_ipv6=True):

2540

interface=None,

2541

use_ipv6=True,

2542

socketfd=None):

2543

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

2544

creating a new one with socket.socket().

2545

"""

1903

2546

self.interface = interface

1904

2547

if use_ipv6:

1905

2548

self.address_family = socket.AF_INET6

2549

if socketfd is not None:

2550

# Save the file descriptor

2551

self.socketfd = socketfd

2552

# Save the original socket.socket() function

2553

self.socket_socket = socket.socket

2554

2555

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

2556

#

2557

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

2558

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

2559

# patching socket.socket.)

2560

#

2561

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

2562

@functools.wraps(socket.socket)

2563

def socket_wrapper(*args, **kwargs):

2564

# Restore original function so subsequent calls are

2565

# not affected.

2566

socket.socket = self.socket_socket

2567

del self.socket_socket

2568

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

2569

# saved file descriptor.

2570

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

2571

# Replace socket.socket() function with wrapper

2572

socket.socket = socket_wrapper

2573

# The socketserver.TCPServer.__init__ will call

2574

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

2575

# socket_wrapper(), if socketfd was set.

1906

2576

socketserver.TCPServer.__init__(self, server_address,

1907

2577

RequestHandlerClass)

2578

1908

2579

def server_bind(self):

1909

2580

"""This overrides the normal server_bind() function

1910

2581

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

1911

2582

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

2583

global SO_BINDTODEVICE

1912

2584

if self.interface is not None:

1913

2585

if SO_BINDTODEVICE is None:

1914

logger.error("SO_BINDTODEVICE does not exist;"

1915

" cannot bind to interface %s",

1916

self.interface)

1917

else:

1918

try:

1919

self.socket.setsockopt(socket.SOL_SOCKET,

1920

SO_BINDTODEVICE,

1921

str(self.interface

1922

+ '\0'))

1923

except socket.error as error:

1924

if error.errno == errno.EPERM:

1925

logger.error("No permission to"

1926

" bind to interface %s",

1927

self.interface)

1928

elif error.errno == errno.ENOPROTOOPT:

1929

logger.error("SO_BINDTODEVICE not available;"

1930

" cannot bind to interface %s",

1931

self.interface)

1932

elif error.errno == errno.ENODEV:

1933

logger.error("Interface %s does not"

1934

" exist, cannot bind",

1935

self.interface)

1936

else:

1937

raise

2586

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

2587

# common enough.

2588

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

2589

SO_BINDTODEVICE = 25

2590

try:

2591

self.socket.setsockopt(

2592

socket.SOL_SOCKET, SO_BINDTODEVICE,

2593

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

2594

except socket.error as error:

2595

if error.errno == errno.EPERM:

2596

logger.error("No permission to bind to"

2597

" interface %s", self.interface)

2598

elif error.errno == errno.ENOPROTOOPT:

2599

logger.error("SO_BINDTODEVICE not available;"

2600

" cannot bind to interface %s",

2601

self.interface)

2602

elif error.errno == errno.ENODEV:

2603

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

2604

" cannot bind", self.interface)

2605

else:

2606

raise

1938

2607

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

1939

2608

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

2609

if self.server_address[1]:

2610

self.allow_reuse_address = True

1940

2611

if not self.server_address[0]:

1941

2612

if self.address_family == socket.AF_INET6:

1942

any_address = "::" # in6addr_any

2613

any_address = "::" # in6addr_any

1943

2614

else:

1944

any_address = socket.INADDR_ANY

2615

any_address = "0.0.0.0" # INADDR_ANY

1945

2616

self.server_address = (any_address,

1946

2617

self.server_address[1])

1947

2618

elif not self.server_address[1]:

1948

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

1949

0)

2619

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

1950

2620

# if self.interface:

1951

2621

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

1952

2622

# 0, # port

1958

2628

1959

2629

class MandosServer(IPv6_TCPServer):

1960

2630

"""Mandos server.

1961

2631

1962

2632

Attributes:

1963

2633

clients: set of Client objects

1964

2634

gnutls_priority GnuTLS priority string

1965

2635

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

1966

1967

Assumes a gobject.MainLoop event loop.

2636

2637

Assumes a GLib.MainLoop event loop.

1968

2638

"""

2639

1969

2640

def __init__(self, server_address, RequestHandlerClass,

1970

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

1971

gnutls_priority=None, use_dbus=True):

2641

interface=None,

2642

use_ipv6=True,

2643

clients=None,

2644

gnutls_priority=None,

2645

use_dbus=True,

2646

socketfd=None):

1972

2647

self.enabled = False

1973

2648

self.clients = clients

1974

2649

if self.clients is None:

1977

2652

self.gnutls_priority = gnutls_priority

1978

2653

IPv6_TCPServer.__init__(self, server_address,

1979

2654

RequestHandlerClass,

1980

interface = interface,

1981

use_ipv6 = use_ipv6)

2655

interface=interface,

2656

use_ipv6=use_ipv6,

2657

socketfd=socketfd)

2658

1982

2659

def server_activate(self):

1983

2660

if self.enabled:

1984

2661

return socketserver.TCPServer.server_activate(self)

1985

2662

1986

2663

def enable(self):

1987

2664

self.enabled = True

1988

2665

1989

2666

def add_pipe(self, parent_pipe, proc):

1990

2667

# Call "handle_ipc" for both data and EOF events

1991

gobject.io_add_watch(parent_pipe.fileno(),

1992

gobject.IO_IN | gobject.IO_HUP,

1993

functools.partial(self.handle_ipc,

1994

parent_pipe =

1995

parent_pipe,

1996

proc = proc))

1997

1998

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

1999

proc = None, client_object=None):

2668

GLib.io_add_watch(

2669

parent_pipe.fileno(),

2670

GLib.IO_IN | GLib.IO_HUP,

2671

functools.partial(self.handle_ipc,

2672

parent_pipe=parent_pipe,

2673

proc=proc))

2674

2675

def handle_ipc(self, source, condition,

2676

parent_pipe=None,

2677

proc=None,

2678

client_object=None):

2000

2679

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

2001

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

2680

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

2002

2681

# Wait for other process to exit

2003

2682

proc.join()

2004

2683

return False

2005

2684

2006

2685

# Read a request from the child

2007

2686

request = parent_pipe.recv()

2008

2687

command = request[0]

2009

2688

2010

2689

if command == 'init':

2011

fpr = request[1]

2012

address = request[2]

2013

2014

for c in self.clients.itervalues():

2015

if c.fingerprint == fpr:

2690

key_id = request[1].decode("ascii")

2691

fpr = request[2].decode("ascii")

2692

address = request[3]

2693

2694

for c in self.clients.values():

2695

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2696

continue

2697

if key_id and c.key_id == key_id:

2698

client = c

2699

break

2700

if fpr and c.fingerprint == fpr:

2016

2701

client = c

2017

2702

break

2018

2703

else:

2019

logger.info("Client not found for fingerprint: %s, ad"

2020

"dress: %s", fpr, address)

2704

logger.info("Client not found for key ID: %s, address"

2705

": %s", key_id or fpr, address)

2021

2706

if self.use_dbus:

2022

2707

# Emit D-Bus signal

2023

mandos_dbus_service.ClientNotFound(fpr,

2708

mandos_dbus_service.ClientNotFound(key_id or fpr,

2024

2709

address[0])

2025

2710

parent_pipe.send(False)

2026

2711

return False

2027

2028

gobject.io_add_watch(parent_pipe.fileno(),

2029

gobject.IO_IN | gobject.IO_HUP,

2030

functools.partial(self.handle_ipc,

2031

parent_pipe =

2032

parent_pipe,

2033

proc = proc,

2034

client_object =

2035

client))

2712

2713

GLib.io_add_watch(

2714

parent_pipe.fileno(),

2715

GLib.IO_IN | GLib.IO_HUP,

2716

functools.partial(self.handle_ipc,

2717

parent_pipe=parent_pipe,

2718

proc=proc,

2719

client_object=client))

2036

2720

parent_pipe.send(True)

2037

2721

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

2038

2722

# same fileno

2041

2725

funcname = request[1]

2042

2726

args = request[2]

2043

2727

kwargs = request[3]

2044

2728

2045

2729

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

2046

2730

funcname)(*args,

2047

**kwargs)))

2048

2731

**kwargs)))

2732

2049

2733

if command == 'getattr':

2050

2734

attrname = request[1]

2051

if callable(client_object.__getattribute__(attrname)):

2052

parent_pipe.send(('function',))

2735

if isinstance(client_object.__getattribute__(attrname),

2736

collections.Callable):

2737

parent_pipe.send(('function', ))

2053

2738

else:

2054

parent_pipe.send(('data', client_object

2055

.__getattribute__(attrname)))

2056

2739

parent_pipe.send((

2740

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

2741

2057

2742

if command == 'setattr':

2058

2743

attrname = request[1]

2059

2744

value = request[2]

2060

2745

setattr(client_object, attrname, value)

2061

2746

2062

2747

return True

2063

2748

2064

2749

2750

def rfc3339_duration_to_delta(duration):

2751

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

2752

2753

>>> rfc3339_duration_to_delta("P7D")

2754

datetime.timedelta(7)

2755

>>> rfc3339_duration_to_delta("PT60S")

2756

datetime.timedelta(0, 60)

2757

>>> rfc3339_duration_to_delta("PT60M")

2758

datetime.timedelta(0, 3600)

2759

>>> rfc3339_duration_to_delta("PT24H")

2760

datetime.timedelta(1)

2761

>>> rfc3339_duration_to_delta("P1W")

2762

datetime.timedelta(7)

2763

>>> rfc3339_duration_to_delta("PT5M30S")

2764

datetime.timedelta(0, 330)

2765

>>> rfc3339_duration_to_delta("P1DT3M20S")

2766

datetime.timedelta(1, 200)

2767

"""

2768

2769

# Parsing an RFC 3339 duration with regular expressions is not

2770

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

2771

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

2772

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

2773

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

2774

# avoid excessive use of external libraries.

2775

2776

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

2777

Token = collections.namedtuple("Token", (

2778

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

2779

# a "group" containing digits

2780

"value", # datetime.timedelta or None

2781

"followers")) # Tokens valid after this token

2782

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

2783

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

2784

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

2785

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

2786

datetime.timedelta(seconds=1),

2787

frozenset((token_end, )))

2788

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

2789

datetime.timedelta(minutes=1),

2790

frozenset((token_second, token_end)))

2791

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

2792

datetime.timedelta(hours=1),

2793

frozenset((token_minute, token_end)))

2794

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

2795

None,

2796

frozenset((token_hour, token_minute,

2797

token_second)))

2798

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

2799

datetime.timedelta(days=1),

2800

frozenset((token_time, token_end)))

2801

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

2802

datetime.timedelta(weeks=4),

2803

frozenset((token_day, token_end)))

2804

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

2805

datetime.timedelta(weeks=52),

2806

frozenset((token_month, token_end)))

2807

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

2808

datetime.timedelta(weeks=1),

2809

frozenset((token_end, )))

2810

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

2811

frozenset((token_year, token_month,

2812

token_day, token_time,

2813

token_week)))

2814

# Define starting values:

2815

# Value so far

2816

value = datetime.timedelta()

2817

found_token = None

2818

# Following valid tokens

2819

followers = frozenset((token_duration, ))

2820

# String left to parse

2821

s = duration

2822

# Loop until end token is found

2823

while found_token is not token_end:

2824

# Search for any currently valid tokens

2825

for token in followers:

2826

match = token.regexp.match(s)

2827

if match is not None:

2828

# Token found

2829

if token.value is not None:

2830

# Value found, parse digits

2831

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

2832

# Add to value so far

2833

value += factor * token.value

2834

# Strip token from string

2835

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

2836

# Go to found token

2837

found_token = token

2838

# Set valid next tokens

2839

followers = found_token.followers

2840

break

2841

else:

2842

# No currently valid tokens were found

2843

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

2844

.format(duration))

2845

# End token found

2846

return value

2847

2848

2065

2849

def string_to_delta(interval):

2066

2850

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

2067

2851

2068

2852

>>> string_to_delta('7d')

2069

2853

datetime.timedelta(7)

2070

2854

>>> string_to_delta('60s')

2078

2862

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

2079

2863

datetime.timedelta(0, 330)

2080

2864

"""

2865

2866

try:

2867

return rfc3339_duration_to_delta(interval)

2868

except ValueError:

2869

pass

2870

2081

2871

timevalue = datetime.timedelta(0)

2082

2872

for s in interval.split():

2083

2873

try:

2084

suffix = unicode(s[-1])

2874

suffix = s[-1]

2085

2875

value = int(s[:-1])

2086

2876

if suffix == "d":

2087

2877

delta = datetime.timedelta(value)

2094

2884

elif suffix == "w":

2095

2885

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

2096

2886

else:

2097

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

2098

.format(suffix))

2099

except (ValueError, IndexError) as e:

2887

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

2888

except IndexError as e:

2100

2889

raise ValueError(*(e.args))

2101

2890

timevalue += delta

2102

2891

return timevalue

2103

2892

2104

2893

2105

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

2894

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

2106

2895

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

2107

2896

2108

2897

This should really exist as os.daemon, but it doesn't (yet)."""

2109

2898

if os.fork():

2110

2899

sys.exit()

2118

2907

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

2119

2908

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

2120

2909

raise OSError(errno.ENODEV,

2121

"{0} not a character device"

2910

"{} not a character device"

2122

2911

.format(os.devnull))

2123

2912

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

2124

2913

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

2128

2917

2129

2918

2130

2919

def main():

2131

2920

2132

2921

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

2133

2922

# Parsing of options, both command line and config file

2134

2923

2135

2924

parser = argparse.ArgumentParser()

2136

2925

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

2137

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

2926

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

2138

2927

help="show version number and exit")

2139

2928

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

2140

2929

help="Bind to interface IF")

2146

2935

help="Run self-test")

2147

2936

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

2148

2937

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

2149

" to terminal")

2938

" to terminal", default=None)

2150

2939

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

2151

2940

help="Debug level for stdout output")

2152

2941

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

2159

2948

" files")

2160

2949

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

2161

2950

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

2162

" system bus interface")

2951

" system bus interface", default=None)

2163

2952

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

2164

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

2953

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

2954

default=None)

2165

2955

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

2166

2956

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

2167

" state")

2957

" state", default=None)

2958

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

2959

help="Specify a file descriptor to a network"

2960

" socket to use instead of creating one")

2168

2961

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

2169

2962

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

2170

2963

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

2964

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

2965

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

2966

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

2967

default=None)

2968

2171

2969

options = parser.parse_args()

2172

2970

2173

2971

if options.check:

2174

2972

import doctest

2175

doctest.testmod()

2176

sys.exit()

2177

2973

fail_count, test_count = doctest.testmod()

2974

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

2975

2178

2976

# Default values for config file for server-global settings

2179

server_defaults = { "interface": "",

2180

"address": "",

2181

"port": "",

2182

"debug": "False",

2183

"priority":

2184

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

2185

"servicename": "Mandos",

2186

"use_dbus": "True",

2187

"use_ipv6": "True",

2188

"debuglevel": "",

2189

"restore": "True",

2190

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

2191

}

2192

2977

if gnutls.has_rawpk:

2978

priority = ("SECURE128:!CTYPE-X.509:+CTYPE-RAWPK:!RSA"

2979

":!VERS-ALL:+VERS-TLS1.3:%PROFILE_ULTRA")

2980

else:

2981

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

2982

":+SIGN-DSA-SHA256")

2983

server_defaults = {"interface": "",

2984

"address": "",

2985

"port": "",

2986

"debug": "False",

2987

"priority": priority,

2988

"servicename": "Mandos",

2989

"use_dbus": "True",

2990

"use_ipv6": "True",

2991

"debuglevel": "",

2992

"restore": "True",

2993

"socket": "",

2994

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

2995

"foreground": "False",

2996

"zeroconf": "True",

2997

}

2998

del priority

2999

2193

3000

# Parse config file for server-global settings

2194

3001

server_config = configparser.SafeConfigParser(server_defaults)

2195

3002

del server_defaults

2196

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

2197

"mandos.conf"))

3003

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

2198

3004

# Convert the SafeConfigParser object to a dict

2199

3005

server_settings = server_config.defaults()

2200

3006

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

2201

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

3007

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

3008

"foreground", "zeroconf"):

2202

3009

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

2203

3010

option)

2204

3011

if server_settings["port"]:

2205

3012

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

2206

3013

"port")

3014

if server_settings["socket"]:

3015

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

3016

"socket")

3017

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

3018

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

3019

# happen with a supplied network socket.

3020

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

3021

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

3022

["socket"])

2207

3023

del server_config

2208

3024

2209

3025

# Override the settings from the config file with command line

2210

3026

# options, if set.

2211

3027

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

2212

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

2213

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

2214

"statedir"):

3028

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

3029

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

3030

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

2215

3031

value = getattr(options, option)

2216

3032

if value is not None:

2217

3033

server_settings[option] = value

2218

3034

del options

2219

3035

# Force all strings to be unicode

2220

3036

for option in server_settings.keys():

2221

if type(server_settings[option]) is str:

2222

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

3037

if isinstance(server_settings[option], bytes):

3038

server_settings[option] = (server_settings[option]

3039

.decode("utf-8"))

3040

# Force all boolean options to be boolean

3041

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

3042

"foreground", "zeroconf"):

3043

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

3044

# Debug implies foreground

3045

if server_settings["debug"]:

3046

server_settings["foreground"] = True

2223

3047

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

2224

3048

2225

3049

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

2226

3050

3051

if (not server_settings["zeroconf"]

3052

and not (server_settings["port"]

3053

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

3054

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

3055

2227

3056

# For convenience

2228

3057

debug = server_settings["debug"]

2229

3058

debuglevel = server_settings["debuglevel"]

2231

3060

use_ipv6 = server_settings["use_ipv6"]

2232

3061

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

2233

3062

stored_state_file)

2234

3063

foreground = server_settings["foreground"]

3064

zeroconf = server_settings["zeroconf"]

3065

2235

3066

if debug:

2236

3067

initlogger(debug, logging.DEBUG)

2237

3068

else:

2240

3071

else:

2241

3072

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

2242

3073

initlogger(debug, level)

2243

3074

2244

3075

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

2245

syslogger.setFormatter(logging.Formatter

2246

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

2247

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

2248

.format(server_settings

2249

["servicename"])))

2250

3076

syslogger.setFormatter(

3077

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

3078

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

3079

server_settings["servicename"])))

3080

2251

3081

# Parse config file with clients

2252

3082

client_config = configparser.SafeConfigParser(Client

2253

3083

.client_defaults)

2254

3084

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

2255

3085

"clients.conf"))

2256

3086

2257

3087

global mandos_dbus_service

2258

3088

mandos_dbus_service = None

2259

2260

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

2261

server_settings["port"]),

2262

ClientHandler,

2263

interface=(server_settings["interface"]

2264

or None),

2265

use_ipv6=use_ipv6,

2266

gnutls_priority=

2267

server_settings["priority"],

2268

use_dbus=use_dbus)

2269

if not debug:

2270

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

3089

3090

socketfd = None

3091

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

3092

socketfd = server_settings["socket"]

3093

tcp_server = MandosServer(

3094

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

3095

ClientHandler,

3096

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

3097

use_ipv6=use_ipv6,

3098

gnutls_priority=server_settings["priority"],

3099

use_dbus=use_dbus,

3100

socketfd=socketfd)

3101

if not foreground:

3102

pidfilename = "/run/mandos.pid"

3103

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

3104

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

3105

pidfile = None

2271

3106

try:

2272

pidfile = open(pidfilename, "w")

3107

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

2273

3108

except IOError as e:

2274

3109

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

2275

3110

exc_info=e)

2276

2277

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

3111

3112

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

3113

("mandos", "mandos"),

3114

("nobody", "nogroup")):

2278

3115

try:

2279

3116

uid = pwd.getpwnam(name).pw_uid

2280

gid = pwd.getpwnam(name).pw_gid

3117

gid = pwd.getpwnam(group).pw_gid

2281

3118

break

2282

3119

except KeyError:

2283

3120

continue

2287

3124

try:

2288

3125

os.setgid(gid)

2289

3126

os.setuid(uid)

3127

if debug:

3128

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

3129

gid))

2290

3130

except OSError as error:

3131

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

3132

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

2291

3133

if error.errno != errno.EPERM:

2292

raise error

2293

3134

raise

3135

2294

3136

if debug:

2295

3137

# Enable all possible GnuTLS debugging

2296

3138

2297

3139

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

2298

3140

# - GnuTLS manual

2299

gnutls.library.functions.gnutls_global_set_log_level(11)

2300

2301

@gnutls.library.types.gnutls_log_func

3141

gnutls.global_set_log_level(11)

3142

3143

@gnutls.log_func

2302

3144

def debug_gnutls(level, string):

2303

3145

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

2304

2305

(gnutls.library.functions

2306

.gnutls_global_set_log_function(debug_gnutls))

2307

3146

3147

gnutls.global_set_log_function(debug_gnutls)

3148

2308

3149

# Redirect stdin so all checkers get /dev/null

2309

3150

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

2310

3151

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

2311

3152

if null > 2:

2312

3153

os.close(null)

2313

3154

2314

3155

# Need to fork before connecting to D-Bus

2315

if not debug:

3156

if not foreground:

2316

3157

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

2317

3158

daemon()

2318

2319

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

2320

# need to inform gobject that threads will be used.

2321

gobject.threads_init()

2322

3159

3160

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

3161

# to inform GLib that threads will be used.

3162

GLib.threads_init()

3163

2323

3164

global main_loop

2324

3165

# From the Avahi example code

2325

3166

DBusGMainLoop(set_as_default=True)

2326

main_loop = gobject.MainLoop()

3167

main_loop = GLib.MainLoop()

2327

3168

bus = dbus.SystemBus()

2328

3169

# End of Avahi example code

2329

3170

if use_dbus:

2330

3171

try:

2331

3172

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

2332

bus, do_not_queue=True)

2333

old_bus_name = (dbus.service.BusName

2334

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

2335

do_not_queue=True))

2336

except dbus.exceptions.NameExistsException as e:

3173

bus,

3174

do_not_queue=True)

3175

old_bus_name = dbus.service.BusName(

3176

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

3177

do_not_queue=True)

3178

except dbus.exceptions.DBusException as e:

2337

3179

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

2338

3180

use_dbus = False

2339

3181

server_settings["use_dbus"] = False

2340

3182

tcp_server.use_dbus = False

2341

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2342

service = AvahiServiceToSyslog(name =

2343

server_settings["servicename"],

2344

servicetype = "_mandos._tcp",

2345

protocol = protocol, bus = bus)

2346

if server_settings["interface"]:

2347

service.interface = (if_nametoindex

2348

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

2349

3183

if zeroconf:

3184

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3185

service = AvahiServiceToSyslog(

3186

name=server_settings["servicename"],

3187

servicetype="_mandos._tcp",

3188

protocol=protocol,

3189

bus=bus)

3190

if server_settings["interface"]:

3191

service.interface = if_nametoindex(

3192

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

3193

2350

3194

global multiprocessing_manager

2351

3195

multiprocessing_manager = multiprocessing.Manager()

2352

3196

2353

3197

client_class = Client

2354

3198

if use_dbus:

2355

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

2356

3199

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

3200

2357

3201

client_settings = Client.config_parser(client_config)

2358

3202

old_client_settings = {}

2359

3203

clients_data = {}

2360

3204

3205

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

3206

global wnull

3207

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

3208

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

3209

# mode

3210

if debug or not foreground:

3211

wnull.close()

3212

2361

3213

# Get client data and settings from last running state.

2362

3214

if server_settings["restore"]:

2363

3215

try:

2364

3216

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

2365

clients_data, old_client_settings = (pickle.load

2366

(stored_state))

3217

if sys.version_info.major == 2:

3218

clients_data, old_client_settings = pickle.load(

3219

stored_state)

3220

else:

3221

bytes_clients_data, bytes_old_client_settings = (

3222

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

3223

# Fix bytes to strings

3224

# clients_data

3225

# .keys()

3226

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

3227

if isinstance(key, bytes)

3228

else key): value

3229

for key, value in

3230

bytes_clients_data.items()}

3231

del bytes_clients_data

3232

for key in clients_data:

3233

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

3234

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

3235

for k, v in

3236

clients_data[key].items()}

3237

clients_data[key] = value

3238

# .client_structure

3239

value["client_structure"] = [

3240

(s.decode("utf-8")

3241

if isinstance(s, bytes)

3242

else s) for s in

3243

value["client_structure"]]

3244

# .name & .host

3245

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

3246

if isinstance(value[k], bytes):

3247

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

3248

if "key_id" not in value:

3249

value["key_id"] = ""

3250

elif "fingerprint" not in value:

3251

value["fingerprint"] = ""

3252

# old_client_settings

3253

# .keys()

3254

old_client_settings = {

3255

(key.decode("utf-8")

3256

if isinstance(key, bytes)

3257

else key): value

3258

for key, value in

3259

bytes_old_client_settings.items()}

3260

del bytes_old_client_settings

3261

# .host

3262

for value in old_client_settings.values():

3263

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

3264

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

3265

.decode("utf-8"))

2367

3266

os.remove(stored_state_path)

2368

3267

except IOError as e:

2369

3268

if e.errno == errno.ENOENT:

2370

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

2371

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

3269

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

3270

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

2372

3271

else:

2373

3272

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

2374

3273

exc_info=e)

2375

3274

raise

2376

3275

except EOFError as e:

2377

3276

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

2378

"EOFError:", exc_info=e)

2379

3277

"EOFError:",

3278

exc_info=e)

3279

2380

3280

with PGPEngine() as pgp:

2381

for client_name, client in clients_data.iteritems():

3281

for client_name, client in clients_data.items():

3282

# Skip removed clients

3283

if client_name not in client_settings:

3284

continue

3285

2382

3286

# Decide which value to use after restoring saved state.

2383

3287

# We have three different values: Old config file,

2384

3288

# new config file, and saved state.

2389

3293

# For each value in new config, check if it

2390

3294

# differs from the old config value (Except for

2391

3295

# the "secret" attribute)

2392

if (name != "secret" and

2393

value != old_client_settings[client_name]

2394

[name]):

3296

if (name != "secret"

3297

and (value !=

3298

old_client_settings[client_name][name])):

2395

3299

client[name] = value

2396

3300

except KeyError:

2397

3301

pass

2398

3302

2399

3303

# Clients who has passed its expire date can still be

2400

# enabled if its last checker was successful. Clients

3304

# enabled if its last checker was successful. A Client

2401

3305

# whose checker succeeded before we stored its state is

2402

3306

# assumed to have successfully run all checkers during

2403

3307

# downtime.

2405

3309

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

2406

3310

if not client["last_checked_ok"]:

2407

3311

logger.warning(

2408

"disabling client {0} - Client never "

2409

"performed a successful checker"

2410

.format(client_name))

3312

"disabling client {} - Client never "

3313

"performed a successful checker".format(

3314

client_name))

2411

3315

client["enabled"] = False

2412

3316

elif client["last_checker_status"] != 0:

2413

3317

logger.warning(

2414

"disabling client {0} - Client "

2415

"last checker failed with error code {1}"

2416

.format(client_name,

2417

client["last_checker_status"]))

3318

"disabling client {} - Client last"

3319

" checker failed with error code"

3320

" {}".format(

3321

client_name,

3322

client["last_checker_status"]))

2418

3323

client["enabled"] = False

2419

3324

else:

2420

client["expires"] = (datetime.datetime

2421

.utcnow()

2422

+ client["timeout"])

3325

client["expires"] = (

3326

datetime.datetime.utcnow()

3327

+ client["timeout"])

2423

3328

logger.debug("Last checker succeeded,"

2424

" keeping {0} enabled"

2425

.format(client_name))

3329

" keeping {} enabled".format(

3330

client_name))

2426

3331

try:

2427

client["secret"] = (

2428

pgp.decrypt(client["encrypted_secret"],

2429

client_settings[client_name]

2430

["secret"]))

3332

client["secret"] = pgp.decrypt(

3333

client["encrypted_secret"],

3334

client_settings[client_name]["secret"])

2431

3335

except PGPError:

2432

3336

# If decryption fails, we use secret from new settings

2433

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

2434

.format(client_name))

2435

client["secret"] = (

2436

client_settings[client_name]["secret"])

2437

3337

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

3338

client_name))

3339

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

3340

["secret"])

3341

2438

3342

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

2439

3343

for client_name in (set(old_client_settings)

2440

3344

- set(client_settings)):

2442

3346

for client_name in (set(client_settings)

2443

3347

- set(old_client_settings)):

2444

3348

clients_data[client_name] = client_settings[client_name]

2445

3349

2446

3350

# Create all client objects

2447

for client_name, client in clients_data.iteritems():

3351

for client_name, client in clients_data.items():

2448

3352

tcp_server.clients[client_name] = client_class(

2449

name = client_name, settings = client)

2450

3353

name=client_name,

3354

settings=client,

3355

server_settings=server_settings)

3356

2451

3357

if not tcp_server.clients:

2452

3358

logger.warning("No clients defined")

2453

2454

if not debug:

2455

try:

2456

with pidfile:

2457

pid = os.getpid()

2458

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

2459

del pidfile

2460

except IOError:

2461

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

2462

pidfilename, pid)

2463

except NameError:

2464

# "pidfile" was never created

2465

pass

3359

3360

if not foreground:

3361

if pidfile is not None:

3362

pid = os.getpid()

3363

try:

3364

with pidfile:

3365

print(pid, file=pidfile)

3366

except IOError:

3367

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

3368

pidfilename, pid)

3369

del pidfile

2466

3370

del pidfilename

2467

2468

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

2469

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

2470

3371

3372

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

3373

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3374

lambda: main_loop.quit() and False)

3375

2471

3376

if use_dbus:

2472

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

2473

"se.bsnet.fukt.Mandos"})

2474

class MandosDBusService(DBusObjectWithProperties):

3377

3378

@alternate_dbus_interfaces(

3379

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

3380

class MandosDBusService(DBusObjectWithObjectManager):

2475

3381

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

3382

2476

3383

def __init__(self):

2477

3384

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

3385

2478

3386

_interface = "se.recompile.Mandos"

2479

2480

@dbus_interface_annotations(_interface)

2481

def _foo(self):

2482

return { "org.freedesktop.DBus.Property"

2483

".EmitsChangedSignal":

2484

"false"}

2485

3387

2486

3388

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

2487

3389

def ClientAdded(self, objpath):

2488

3390

"D-Bus signal"

2489

3391

pass

2490

3392

2491

3393

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

2492

def ClientNotFound(self, fingerprint, address):

3394

def ClientNotFound(self, key_id, address):

2493

3395

"D-Bus signal"

2494

3396

pass

2495

3397

3398

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

3399

"true"})

2496

3400

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

2497

3401

def ClientRemoved(self, objpath, name):

2498

3402

"D-Bus signal"

2499

3403

pass

2500

3404

3405

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

3406

"true"})

2501

3407

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

2502

3408

def GetAllClients(self):

2503

3409

"D-Bus method"

2504

return dbus.Array(c.dbus_object_path

2505

for c in

2506

tcp_server.clients.itervalues())

2507

3410

return dbus.Array(c.dbus_object_path for c in

3411

tcp_server.clients.values())

3412

3413

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

3414

"true"})

2508

3415

@dbus.service.method(_interface,

2509

3416

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

2510

3417

def GetAllClientsWithProperties(self):

2511

3418

"D-Bus method"

2512

3419

return dbus.Dictionary(

2513

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

2514

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

3420

{c.dbus_object_path: c.GetAll(

3421

"se.recompile.Mandos.Client")

3422

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

2515

3423

signature="oa{sv}")

2516

3424

2517

3425

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

2518

3426

def RemoveClient(self, object_path):

2519

3427

"D-Bus method"

2520

for c in tcp_server.clients.itervalues():

3428

for c in tcp_server.clients.values():

2521

3429

if c.dbus_object_path == object_path:

2522

3430

del tcp_server.clients[c.name]

2523

3431

c.remove_from_connection()

2524

# Don't signal anything except ClientRemoved

3432

# Don't signal the disabling

2525

3433

c.disable(quiet=True)

2526

# Emit D-Bus signal

2527

self.ClientRemoved(object_path, c.name)

3434

# Emit D-Bus signal for removal

3435

self.client_removed_signal(c)

2528

3436

return

2529

3437

raise KeyError(object_path)

2530

3438

2531

3439

del _interface

2532

3440

3441

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3442

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

3443

def GetManagedObjects(self):

3444

"""D-Bus method"""

3445

return dbus.Dictionary(

3446

{client.dbus_object_path:

3447

dbus.Dictionary(

3448

{interface: client.GetAll(interface)

3449

for interface in

3450

client._get_all_interface_names()})

3451

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

3452

3453

def client_added_signal(self, client):

3454

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

3455

if use_dbus:

3456

# New standard signal

3457

self.InterfacesAdded(

3458

client.dbus_object_path,

3459

dbus.Dictionary(

3460

{interface: client.GetAll(interface)

3461

for interface in

3462

client._get_all_interface_names()}))

3463

# Old signal

3464

self.ClientAdded(client.dbus_object_path)

3465

3466

def client_removed_signal(self, client):

3467

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

3468

if use_dbus:

3469

# New standard signal

3470

self.InterfacesRemoved(

3471

client.dbus_object_path,

3472

client._get_all_interface_names())

3473

# Old signal

3474

self.ClientRemoved(client.dbus_object_path,

3475

client.name)

3476

2533

3477

mandos_dbus_service = MandosDBusService()

2534

3478

3479

# Save modules to variables to exempt the modules from being

3480

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

3481

mp = multiprocessing

3482

wn = wnull

3483

2535

3484

def cleanup():

2536

3485

"Cleanup function; run on exit"

2537

service.cleanup()

2538

2539

multiprocessing.active_children()

3486

if zeroconf:

3487

service.cleanup()

3488

3489

mp.active_children()

3490

wn.close()

2540

3491

if not (tcp_server.clients or client_settings):

2541

3492

return

2542

3493

2543

3494

# Store client before exiting. Secrets are encrypted with key

2544

3495

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

2545

3496

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

2546

3497

clients = {}

2547

3498

with PGPEngine() as pgp:

2548

for client in tcp_server.clients.itervalues():

3499

for client in tcp_server.clients.values():

2549

3500

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

2550

3501

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

2551

3502

key)

2552

3503

client_dict = {}

2553

3504

2554

3505

# A list of attributes that can not be pickled

2555

3506

# + secret.

2556

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

2557

"checker"))

2558

for name, typ in (inspect.getmembers

2559

(dbus.service.Object)):

3507

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

3508

"checker", "server_settings"}

3509

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

3510

.Object):

2560

3511

exclude.add(name)

2561

3512

2562

3513

client_dict["encrypted_secret"] = (client

2563

3514

.encrypted_secret)

2564

3515

for attr in client.client_structure:

2565

3516

if attr not in exclude:

2566

3517

client_dict[attr] = getattr(client, attr)

2567

3518

2568

3519

clients[client.name] = client_dict

2569

3520

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

2570

3521

2571

3522

try:

2572

with (tempfile.NamedTemporaryFile

2573

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

2574

dir=os.path.dirname(stored_state_path),

2575

delete=False)) as stored_state:

2576

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

2577

tempname=stored_state.name

3523

with tempfile.NamedTemporaryFile(

3524

mode='wb',

3525

suffix=".pickle",

3526

prefix='clients-',

3527

dir=os.path.dirname(stored_state_path),

3528

delete=False) as stored_state:

3529

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

3530

protocol=2)

3531

tempname = stored_state.name

2578

3532

os.rename(tempname, stored_state_path)

2579

3533

except (IOError, OSError) as e:

2580

3534

if not debug:

2583

3537

except NameError:

2584

3538

pass

2585

3539

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

2586

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

3540

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

2587

3541

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

2588

3542

else:

2589

3543

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

2590

3544

exc_info=e)

2591

raise e

2592

3545

raise

3546

2593

3547

# Delete all clients, and settings from config

2594

3548

while tcp_server.clients:

2595

3549

name, client = tcp_server.clients.popitem()

2596

3550

if use_dbus:

2597

3551

client.remove_from_connection()

2598

# Don't signal anything except ClientRemoved

3552

# Don't signal the disabling

2599

3553

client.disable(quiet=True)

3554

# Emit D-Bus signal for removal

2600

3555

if use_dbus:

2601

# Emit D-Bus signal

2602

mandos_dbus_service.ClientRemoved(client

2603

.dbus_object_path,

2604

client.name)

3556

mandos_dbus_service.client_removed_signal(client)

2605

3557

client_settings.clear()

2606

3558

2607

3559

atexit.register(cleanup)

2608

2609

for client in tcp_server.clients.itervalues():

3560

3561

for client in tcp_server.clients.values():

2610

3562

if use_dbus:

2611

# Emit D-Bus signal

2612

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3563

# Emit D-Bus signal for adding

3564

mandos_dbus_service.client_added_signal(client)

2613

3565

# Need to initiate checking of clients

2614

3566

if client.enabled:

2615

3567

client.init_checker()

2616

3568

2617

3569

tcp_server.enable()

2618

3570

tcp_server.server_activate()

2619

3571

2620

3572

# Find out what port we got

2621

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

3573

if zeroconf:

3574

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

2622

3575

if use_ipv6:

2623

3576

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

2624

3577

" flowinfo %d, scope_id %d",

2626

3579

else: # IPv4

2627

3580

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

2628

3581

*tcp_server.socket.getsockname())

2629

2630

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

2631

3582

3583

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

3584

2632

3585

try:

2633

# From the Avahi example code

2634

try:

2635

service.activate()

2636

except dbus.exceptions.DBusException as error:

2637

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

2638

cleanup()

2639

sys.exit(1)

2640

# End of Avahi example code

2641

2642

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

2643

lambda *args, **kwargs:

2644

(tcp_server.handle_request

2645

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

2646

3586

if zeroconf:

3587

# From the Avahi example code

3588

try:

3589

service.activate()

3590

except dbus.exceptions.DBusException as error:

3591

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

3592

cleanup()

3593

sys.exit(1)

3594

# End of Avahi example code

3595

3596

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

3597

lambda *args, **kwargs:

3598

(tcp_server.handle_request

3599

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

3600

2647

3601

logger.debug("Starting main loop")

2648

3602

main_loop.run()

2649

3603

except AvahiError as error:

2658

3612

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

2659

3613

cleanup()

2660

3614

3615

2661

3616

if __name__ == '__main__':

2662

3617

main()