/mandos/trunk : revision 585

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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 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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#

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

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#

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# along with this program. If not, see

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

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#

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

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#

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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try:

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from future_builtins import *

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except ImportError:

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pass

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from future_builtins import *

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import SocketServer as socketserver

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import socket

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import argparse

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import datetime

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import errno

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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from gi.repository import GLib

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import gobject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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import GnuPGInterface

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# Try to find the value of SO_BINDTODEVICE:

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try:

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

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

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except AttributeError:

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try:

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# This is where SO_BINDTODEVICE was up to and including Python

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# 2.6, and also 3.2:

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from IN import SO_BINDTODEVICE

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except ImportError:

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

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# Try running the C preprocessor:

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try:

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

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"/dev/stdin"],

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE)

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stdout = cc.communicate(

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

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

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except (OSError, ValueError, IndexError):

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# No value found

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.7.20"

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SO_BINDTODEVICE = None

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version = "1.5.3"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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try:

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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def copy_function(func):

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

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility=logging.handlers.SysLogHandler.LOG_DAEMON,

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address="/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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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.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet']

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

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

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

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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

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'--quiet',

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

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if len(encoded) > 2048:

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

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

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

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

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return encoded

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

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen([self.gpg, '--symmetric',

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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

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with open(os.devnull, "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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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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proc = subprocess.Popen([self.gpg, '--decrypt',

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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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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return decrypted_plaintext

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# Pretend that we have an Avahi module

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class Avahi(object):

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

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

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

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

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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def string_array_to_txt_array(self, t):

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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avahi = Avahi()

302

303

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214

class AvahiError(Exception):

305

215

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

306

216

self.value = value

307

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

308

**kwargs)

309

217

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

218

def __unicode__(self):

219

return unicode(repr(self.value))

310

220

311

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class AvahiServiceError(AvahiError):

312

222

pass

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223

314

315

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class AvahiGroupError(AvahiError):

316

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pass

317

226

318

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class AvahiService(object):

320

229

"""An Avahi (Zeroconf) service.

321

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Attributes:

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

324

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Used to optionally bind to the specified interface.

325

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name: string; Example: 'Mandos'

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

327

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

236

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

336

245

server: D-Bus Server

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bus: dbus.SystemBus()

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"""

339

340

def __init__(self,

341

interface=avahi.IF_UNSPEC,

342

name=None,

343

servicetype=None,

344

port=None,

345

TXT=None,

346

domain="",

347

host="",

348

max_renames=32768,

349

protocol=avahi.PROTO_UNSPEC,

350

bus=None):

248

249

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):

351

253

self.interface = interface

352

254

self.name = name

353

255

self.type = servicetype

362

264

self.server = None

363

265

self.bus = bus

364

266

self.entry_group_state_changed_match = None

365

366

def rename(self, remove=True):

267

268

def rename(self):

367

269

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

368

270

if self.rename_count >= self.max_renames:

369

271

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

370

272

" after %i retries, exiting.",

371

273

self.rename_count)

372

274

raise AvahiServiceError("Too many renames")

373

self.name = str(

374

self.server.GetAlternativeServiceName(self.name))

375

self.rename_count += 1

275

self.name = unicode(self.server

276

.GetAlternativeServiceName(self.name))

376

277

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

377

278

self.name)

378

if remove:

379

self.remove()

279

self.remove()

380

280

try:

381

281

self.add()

382

282

except dbus.exceptions.DBusException as error:

383

if (error.get_dbus_name()

384

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

385

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

386

return self.rename(remove=False)

387

else:

388

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

389

self.cleanup()

390

os._exit(1)

391

283

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

284

self.cleanup()

285

os._exit(1)

286

self.rename_count += 1

287

392

288

def remove(self):

393

289

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

394

290

if self.entry_group_state_changed_match is not None:

396

292

self.entry_group_state_changed_match = None

397

293

if self.group is not None:

398

294

self.group.Reset()

399

295

400

296

def add(self):

401

297

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

402

298

self.remove()

419

315

dbus.UInt16(self.port),

420

316

avahi.string_array_to_txt_array(self.TXT))

421

317

self.group.Commit()

422

318

423

319

def entry_group_state_changed(self, state, error):

424

320

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

425

321

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

426

322

427

323

if state == avahi.ENTRY_GROUP_ESTABLISHED:

428

324

logger.debug("Zeroconf service established.")

429

325

elif state == avahi.ENTRY_GROUP_COLLISION:

431

327

self.rename()

432

328

elif state == avahi.ENTRY_GROUP_FAILURE:

433

329

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

434

str(error))

435

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

436

330

unicode(error))

331

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

332

.format(error))

333

437

334

def cleanup(self):

438

335

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

439

336

if self.group is not None:

444

341

pass

445

342

self.group = None

446

343

self.remove()

447

344

448

345

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

449

346

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

450

347

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

451

bad_states = {

452

avahi.SERVER_INVALID: "Zeroconf server invalid",

453

avahi.SERVER_REGISTERING: None,

454

avahi.SERVER_COLLISION: "Zeroconf server name collision",

455

avahi.SERVER_FAILURE: "Zeroconf server failure",

456

}

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" }

457

355

if state in bad_states:

458

356

if bad_states[state] is not None:

459

357

if error is None:

462

360

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

463

361

self.cleanup()

464

362

elif state == avahi.SERVER_RUNNING:

465

try:

466

self.add()

467

except dbus.exceptions.DBusException as error:

468

if (error.get_dbus_name()

469

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

470

logger.info("Local Zeroconf service name"

471

" collision.")

472

return self.rename(remove=False)

473

else:

474

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

475

self.cleanup()

476

os._exit(1)

363

self.add()

477

364

else:

478

365

if error is None:

479

366

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

480

367

else:

481

368

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

482

369

483

370

def activate(self):

484

371

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

485

372

if self.server is None:

489

376

follow_name_owner_changes=True),

490

377

avahi.DBUS_INTERFACE_SERVER)

491

378

self.server.connect_to_signal("StateChanged",

492

self.server_state_changed)

379

self.server_state_changed)

493

380

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

494

381

495

382

496

383

class AvahiServiceToSyslog(AvahiService):

497

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

384

def rename(self):

498

385

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

499

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

500

syslogger.setFormatter(logging.Formatter(

501

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

502

.format(self.name)))

386

ret = AvahiService.rename(self)

387

syslogger.setFormatter(logging.Formatter

388

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

389

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

390

.format(self.name)))

503

391

return ret

504

392

505

393

506

# Pretend that we have a GnuTLS module

507

class GnuTLS(object):

508

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

509

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

510

511

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

512

if library is None:

513

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

514

_library = ctypes.cdll.LoadLibrary(library)

515

del library

516

_need_version = b"3.3.0"

517

_tls_rawpk_version = b"3.6.6"

518

519

def __init__(self):

520

# Need to use "self" here, since this method is called before

521

# the assignment to the "gnutls" global variable happens.

522

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

523

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

524

.format(self._need_version))

525

526

# Unless otherwise indicated, the constants and types below are

527

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

528

529

# Constants

530

E_SUCCESS = 0

531

E_INTERRUPTED = -52

532

E_AGAIN = -28

533

CRT_OPENPGP = 2

534

CRT_RAWPK = 3

535

CLIENT = 2

536

SHUT_RDWR = 0

537

CRD_CERTIFICATE = 1

538

E_NO_CERTIFICATE_FOUND = -49

539

X509_FMT_DER = 0

540

NO_TICKETS = 1<<10

541

ENABLE_RAWPK = 1<<18

542

CTYPE_PEERS = 3

543

KEYID_USE_SHA256 = 1 # gnutls/x509.h

544

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

545

546

# Types

547

class session_int(ctypes.Structure):

548

_fields_ = []

549

session_t = ctypes.POINTER(session_int)

550

551

class certificate_credentials_st(ctypes.Structure):

552

_fields_ = []

553

certificate_credentials_t = ctypes.POINTER(

554

certificate_credentials_st)

555

certificate_type_t = ctypes.c_int

556

557

class datum_t(ctypes.Structure):

558

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

559

('size', ctypes.c_uint)]

560

561

class openpgp_crt_int(ctypes.Structure):

562

_fields_ = []

563

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

564

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

565

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

566

credentials_type_t = ctypes.c_int

567

transport_ptr_t = ctypes.c_void_p

568

close_request_t = ctypes.c_int

569

570

# Exceptions

571

class Error(Exception):

572

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

573

# exception might be raised from within GnuTLS.__init__,

574

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

575

# global variable has happened.

576

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

577

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

578

# code is passed, convert it to a string with

579

# gnutls.strerror()

580

self.code = code

581

if message is None and code is not None:

582

message = GnuTLS.strerror(code)

583

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

584

message, *args)

585

586

class CertificateSecurityError(Error):

587

pass

588

589

# Classes

590

class Credentials(object):

591

def __init__(self):

592

self._c_object = gnutls.certificate_credentials_t()

593

gnutls.certificate_allocate_credentials(

594

ctypes.byref(self._c_object))

595

self.type = gnutls.CRD_CERTIFICATE

596

597

def __del__(self):

598

gnutls.certificate_free_credentials(self._c_object)

599

600

class ClientSession(object):

601

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

602

self._c_object = gnutls.session_t()

603

gnutls_flags = gnutls.CLIENT

604

if gnutls.check_version("3.5.6"):

605

gnutls_flags |= gnutls.NO_TICKETS

606

if gnutls.has_rawpk:

607

gnutls_flags |= gnutls.ENABLE_RAWPK

608

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

609

del gnutls_flags

610

gnutls.set_default_priority(self._c_object)

611

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

612

gnutls.handshake_set_private_extensions(self._c_object,

613

True)

614

self.socket = socket

615

if credentials is None:

616

credentials = gnutls.Credentials()

617

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

618

ctypes.cast(credentials._c_object,

619

ctypes.c_void_p))

620

self.credentials = credentials

621

622

def __del__(self):

623

gnutls.deinit(self._c_object)

624

625

def handshake(self):

626

return gnutls.handshake(self._c_object)

627

628

def send(self, data):

629

data = bytes(data)

630

data_len = len(data)

631

while data_len > 0:

632

data_len -= gnutls.record_send(self._c_object,

633

data[-data_len:],

634

data_len)

635

636

def bye(self):

637

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

638

639

# Error handling functions

640

def _error_code(result):

641

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

642

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

643

if result >= 0:

644

return result

645

if result == gnutls.E_NO_CERTIFICATE_FOUND:

646

raise gnutls.CertificateSecurityError(code=result)

647

raise gnutls.Error(code=result)

648

649

def _retry_on_error(result, func, arguments):

650

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

651

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

652

while result < 0:

653

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

654

return _error_code(result)

655

result = func(*arguments)

656

return result

657

658

# Unless otherwise indicated, the function declarations below are

659

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

660

661

# Functions

662

priority_set_direct = _library.gnutls_priority_set_direct

663

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

664

ctypes.POINTER(ctypes.c_char_p)]

665

priority_set_direct.restype = _error_code

666

667

init = _library.gnutls_init

668

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

669

init.restype = _error_code

670

671

set_default_priority = _library.gnutls_set_default_priority

672

set_default_priority.argtypes = [session_t]

673

set_default_priority.restype = _error_code

674

675

record_send = _library.gnutls_record_send

676

record_send.argtypes = [session_t, ctypes.c_void_p,

677

ctypes.c_size_t]

678

record_send.restype = ctypes.c_ssize_t

679

record_send.errcheck = _retry_on_error

680

681

certificate_allocate_credentials = (

682

_library.gnutls_certificate_allocate_credentials)

683

certificate_allocate_credentials.argtypes = [

684

ctypes.POINTER(certificate_credentials_t)]

685

certificate_allocate_credentials.restype = _error_code

686

687

certificate_free_credentials = (

688

_library.gnutls_certificate_free_credentials)

689

certificate_free_credentials.argtypes = [

690

certificate_credentials_t]

691

certificate_free_credentials.restype = None

692

693

handshake_set_private_extensions = (

694

_library.gnutls_handshake_set_private_extensions)

695

handshake_set_private_extensions.argtypes = [session_t,

696

ctypes.c_int]

697

handshake_set_private_extensions.restype = None

698

699

credentials_set = _library.gnutls_credentials_set

700

credentials_set.argtypes = [session_t, credentials_type_t,

701

ctypes.c_void_p]

702

credentials_set.restype = _error_code

703

704

strerror = _library.gnutls_strerror

705

strerror.argtypes = [ctypes.c_int]

706

strerror.restype = ctypes.c_char_p

707

708

certificate_type_get = _library.gnutls_certificate_type_get

709

certificate_type_get.argtypes = [session_t]

710

certificate_type_get.restype = _error_code

711

712

certificate_get_peers = _library.gnutls_certificate_get_peers

713

certificate_get_peers.argtypes = [session_t,

714

ctypes.POINTER(ctypes.c_uint)]

715

certificate_get_peers.restype = ctypes.POINTER(datum_t)

716

717

global_set_log_level = _library.gnutls_global_set_log_level

718

global_set_log_level.argtypes = [ctypes.c_int]

719

global_set_log_level.restype = None

720

721

global_set_log_function = _library.gnutls_global_set_log_function

722

global_set_log_function.argtypes = [log_func]

723

global_set_log_function.restype = None

724

725

deinit = _library.gnutls_deinit

726

deinit.argtypes = [session_t]

727

deinit.restype = None

728

729

handshake = _library.gnutls_handshake

730

handshake.argtypes = [session_t]

731

handshake.restype = _error_code

732

handshake.errcheck = _retry_on_error

733

734

transport_set_ptr = _library.gnutls_transport_set_ptr

735

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

736

transport_set_ptr.restype = None

737

738

bye = _library.gnutls_bye

739

bye.argtypes = [session_t, close_request_t]

740

bye.restype = _error_code

741

bye.errcheck = _retry_on_error

742

743

check_version = _library.gnutls_check_version

744

check_version.argtypes = [ctypes.c_char_p]

745

check_version.restype = ctypes.c_char_p

746

747

has_rawpk = bool(check_version(_tls_rawpk_version))

748

749

if has_rawpk:

750

# Types

751

class pubkey_st(ctypes.Structure):

752

_fields = []

753

pubkey_t = ctypes.POINTER(pubkey_st)

754

755

x509_crt_fmt_t = ctypes.c_int

756

757

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

758

pubkey_init = _library.gnutls_pubkey_init

759

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

760

pubkey_init.restype = _error_code

761

762

pubkey_import = _library.gnutls_pubkey_import

763

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

764

x509_crt_fmt_t]

765

pubkey_import.restype = _error_code

766

767

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

768

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

769

ctypes.POINTER(ctypes.c_ubyte),

770

ctypes.POINTER(ctypes.c_size_t)]

771

pubkey_get_key_id.restype = _error_code

772

773

pubkey_deinit = _library.gnutls_pubkey_deinit

774

pubkey_deinit.argtypes = [pubkey_t]

775

pubkey_deinit.restype = None

776

else:

777

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

778

779

openpgp_crt_init = _library.gnutls_openpgp_crt_init

780

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

781

openpgp_crt_init.restype = _error_code

782

783

openpgp_crt_import = _library.gnutls_openpgp_crt_import

784

openpgp_crt_import.argtypes = [openpgp_crt_t,

785

ctypes.POINTER(datum_t),

786

openpgp_crt_fmt_t]

787

openpgp_crt_import.restype = _error_code

788

789

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

790

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

791

ctypes.POINTER(ctypes.c_uint)]

792

openpgp_crt_verify_self.restype = _error_code

793

794

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

795

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

796

openpgp_crt_deinit.restype = None

797

798

openpgp_crt_get_fingerprint = (

799

_library.gnutls_openpgp_crt_get_fingerprint)

800

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

801

ctypes.c_void_p,

802

ctypes.POINTER(

803

ctypes.c_size_t)]

804

openpgp_crt_get_fingerprint.restype = _error_code

805

806

if check_version("3.6.4"):

807

certificate_type_get2 = _library.gnutls_certificate_type_get2

808

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

809

certificate_type_get2.restype = _error_code

810

811

# Remove non-public functions

812

del _error_code, _retry_on_error

813

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

814

gnutls = GnuTLS()

815

816

817

def call_pipe(connection, # : multiprocessing.Connection

818

func, *args, **kwargs):

819

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

820

821

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

822

return value on the provided multiprocessing.Connection.

823

"""

824

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

825

connection.close()

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))

826

399

827

400

828

401

class Client(object):

829

402

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

830

403

831

404

Attributes:

832

405

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

833

406

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

835

408

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

836

409

to see if the client lives.

837

410

'None' if no process is running.

838

checker_callback_tag: a GLib event source tag, or None

411

checker_callback_tag: a gobject event source tag, or None

839

412

checker_command: string; External command which is run to check

840

413

if client lives. %() expansions are done at

841

414

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

842

415

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

843

checker_initiator_tag: a GLib event source tag, or None

416

checker_initiator_tag: a gobject event source tag, or None

844

417

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

845

418

client_structure: Object describing what attributes a client has

846

419

and is used for storing the client at exit

847

420

current_checker_command: string; current running checker_command

848

disable_initiator_tag: a GLib event source tag, or None

421

disable_initiator_tag: a gobject event source tag, or None

849

422

enabled: bool()

850

423

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

851

uniquely identify an OpenPGP client

852

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

853

a client using raw public keys

424

uniquely identify the client

854

425

host: string; available for use by the checker command

855

426

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

856

427

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

858

429

last_checker_status: integer between 0 and 255 reflecting exit

859

430

status of last checker. -1 reflects crashed

860

431

checker, -2 means no checker completed yet.

861

last_checker_signal: The signal which killed the last checker, if

862

last_checker_status is -1

863

432

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

864

433

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

865

434

D-Bus identifiers

870

439

runtime_expansions: Allowed attributes for runtime expansion.

871

440

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

872

441

disabled, or None

873

server_settings: The server_settings dict from main()

874

442

"""

875

443

876

444

runtime_expansions = ("approval_delay", "approval_duration",

877

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

445

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

878

446

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

879

447

"last_approval_request", "last_checked_ok",

880

448

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

881

client_defaults = {

882

"timeout": "PT5M",

883

"extended_timeout": "PT15M",

884

"interval": "PT2M",

885

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

886

"host": "",

887

"approval_delay": "PT0S",

888

"approval_duration": "PT1S",

889

"approved_by_default": "True",

890

"enabled": "True",

891

}

892

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

893

475

@staticmethod

894

476

def config_parser(config):

895

477

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

902

484

for client_name in config.sections():

903

485

section = dict(config.items(client_name))

904

486

client = settings[client_name] = {}

905

487

906

488

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

907

489

# Reformat values from string types to Python types

908

490

client["approved_by_default"] = config.getboolean(

909

491

client_name, "approved_by_default")

910

492

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

911

493

"enabled")

912

913

# Uppercase and remove spaces from key_id and fingerprint

914

# for later comparison purposes with return value from the

915

# key_id() and fingerprint() functions

916

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

917

.replace(" ", ""))

494

918

495

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

919

496

.replace(" ", ""))

920

497

if "secret" in section:

921

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

922

.encode("utf-8"),

923

"base64")

498

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

924

499

elif "secfile" in section:

925

500

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

926

501

(section["secfile"])),

927

502

"rb") as secfile:

928

503

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

929

504

else:

930

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

505

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

931

506

.format(section))

932

507

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

933

508

client["extended_timeout"] = string_to_delta(

941

516

client["last_approval_request"] = None

942

517

client["last_checked_ok"] = None

943

518

client["last_checker_status"] = -2

944

519

945

520

return settings

946

947

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

521

522

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

948

523

self.name = name

949

if server_settings is None:

950

server_settings = {}

951

self.server_settings = server_settings

952

524

# adding all client settings

953

for setting, value in settings.items():

525

for setting, value in settings.iteritems():

954

526

setattr(self, setting, value)

955

527

956

528

if self.enabled:

957

529

if not hasattr(self, "last_enabled"):

958

530

self.last_enabled = datetime.datetime.utcnow()

962

534

else:

963

535

self.last_enabled = None

964

536

self.expires = None

965

537

966

538

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

967

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

539

# Uppercase and remove spaces from fingerprint for later

540

# comparison purposes with return value from the fingerprint()

541

# function

968

542

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

969

543

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

970

544

datetime.datetime.utcnow())

971

545

972

546

# attributes specific for this server instance

973

547

self.checker = None

974

548

self.checker_initiator_tag = None

977

551

self.current_checker_command = None

978

552

self.approved = None

979

553

self.approvals_pending = 0

980

self.changedstate = multiprocessing_manager.Condition(

981

multiprocessing_manager.Lock())

982

self.client_structure = [attr

983

for attr in self.__dict__.keys()

554

self.changedstate = (multiprocessing_manager

555

.Condition(multiprocessing_manager

556

.Lock()))

557

self.client_structure = [attr for attr in

558

self.__dict__.iterkeys()

984

559

if not attr.startswith("_")]

985

560

self.client_structure.append("client_structure")

986

987

for name, t in inspect.getmembers(

988

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

561

562

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

563

lambda obj:

564

isinstance(obj,

565

property)):

989

566

if not name.startswith("_"):

990

567

self.client_structure.append(name)

991

568

992

569

# Send notice to process children that client state has changed

993

570

def send_changedstate(self):

994

571

with self.changedstate:

995

572

self.changedstate.notify_all()

996

573

997

574

def enable(self):

998

575

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

999

576

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

1004

581

self.last_enabled = datetime.datetime.utcnow()

1005

582

self.init_checker()

1006

583

self.send_changedstate()

1007

584

1008

585

def disable(self, quiet=True):

1009

586

"""Disable this client."""

1010

587

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

1012

589

if not quiet:

1013

590

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

1014

591

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

1015

GLib.source_remove(self.disable_initiator_tag)

592

gobject.source_remove(self.disable_initiator_tag)

1016

593

self.disable_initiator_tag = None

1017

594

self.expires = None

1018

595

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

1019

GLib.source_remove(self.checker_initiator_tag)

596

gobject.source_remove(self.checker_initiator_tag)

1020

597

self.checker_initiator_tag = None

1021

598

self.stop_checker()

1022

599

self.enabled = False

1023

600

if not quiet:

1024

601

self.send_changedstate()

1025

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

602

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

1026

603

return False

1027

604

1028

605

def __del__(self):

1029

606

self.disable()

1030

607

1031

608

def init_checker(self):

1032

609

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

1033

610

# and every interval from then on.

1034

611

if self.checker_initiator_tag is not None:

1035

GLib.source_remove(self.checker_initiator_tag)

1036

self.checker_initiator_tag = GLib.timeout_add(

1037

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

1038

self.start_checker)

612

gobject.source_remove(self.checker_initiator_tag)

613

self.checker_initiator_tag = (gobject.timeout_add

614

(self.interval_milliseconds(),

615

self.start_checker))

1039

616

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

1040

617

if self.disable_initiator_tag is not None:

1041

GLib.source_remove(self.disable_initiator_tag)

1042

self.disable_initiator_tag = GLib.timeout_add(

1043

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

618

gobject.source_remove(self.disable_initiator_tag)

619

self.disable_initiator_tag = (gobject.timeout_add

620

(self.timeout_milliseconds(),

621

self.disable))

1044

622

# Also start a new checker *right now*.

1045

623

self.start_checker()

1046

1047

def checker_callback(self, source, condition, connection,

1048

command):

624

625

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

1049

626

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

1050

627

self.checker_callback_tag = None

1051

628

self.checker = None

1052

# Read return code from connection (see call_pipe)

1053

returncode = connection.recv()

1054

connection.close()

1055

1056

if returncode >= 0:

1057

self.last_checker_status = returncode

1058

self.last_checker_signal = None

629

if os.WIFEXITED(condition):

630

self.last_checker_status = os.WEXITSTATUS(condition)

1059

631

if self.last_checker_status == 0:

1060

632

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

1061

633

vars(self))

1062

634

self.checked_ok()

1063

635

else:

1064

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

636

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

637

vars(self))

1065

638

else:

1066

639

self.last_checker_status = -1

1067

self.last_checker_signal = -returncode

1068

640

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

1069

641

vars(self))

1070

return False

1071

642

1072

643

def checked_ok(self):

1073

644

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

1074

645

self.last_checked_ok = datetime.datetime.utcnow()

1075

646

self.last_checker_status = 0

1076

self.last_checker_signal = None

1077

647

self.bump_timeout()

1078

648

1079

649

def bump_timeout(self, timeout=None):

1080

650

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

1081

651

if timeout is None:

1082

652

timeout = self.timeout

1083

653

if self.disable_initiator_tag is not None:

1084

GLib.source_remove(self.disable_initiator_tag)

654

gobject.source_remove(self.disable_initiator_tag)

1085

655

self.disable_initiator_tag = None

1086

656

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

1087

self.disable_initiator_tag = GLib.timeout_add(

1088

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

657

self.disable_initiator_tag = (gobject.timeout_add

658

(timedelta_to_milliseconds

659

(timeout), self.disable))

1089

660

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

1090

661

1091

662

def need_approval(self):

1092

663

self.last_approval_request = datetime.datetime.utcnow()

1093

664

1094

665

def start_checker(self):

1095

666

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

1096

667

1097

668

If a checker already exists, leave it running and do

1098

669

nothing."""

1099

670

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

1104

675

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

1105

676

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

1106

677

# should be.

1107

1108

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

1109

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

1110

self.checker.join()

1111

self.checker = None

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)

1112

692

# Start a new checker if needed

1113

693

if self.checker is None:

1114

694

# Escape attributes for the shell

1115

escaped_attrs = {

1116

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

1117

for attr in self.runtime_expansions}

695

escaped_attrs = dict(

696

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

697

for attr in

698

self.runtime_expansions)

1118

699

try:

1119

700

command = self.checker_command % escaped_attrs

1120

701

except TypeError as error:

1121

702

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

1122

self.checker_command,

703

self.checker_command, exc_info=error)

704

return True # Try again later

705

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",

1123

718

exc_info=error)

1124

return True # Try again later

1125

self.current_checker_command = command

1126

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

1127

self.name)

1128

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

1129

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

1130

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

1131

# always replaced by /dev/null.)

1132

# The exception is when not debugging but nevertheless

1133

# running in the foreground; use the previously

1134

# created wnull.

1135

popen_args = {"close_fds": True,

1136

"shell": True,

1137

"cwd": "/"}

1138

if (not self.server_settings["debug"]

1139

and self.server_settings["foreground"]):

1140

popen_args.update({"stdout": wnull,

1141

"stderr": wnull})

1142

pipe = multiprocessing.Pipe(duplex=False)

1143

self.checker = multiprocessing.Process(

1144

target=call_pipe,

1145

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

1146

kwargs=popen_args)

1147

self.checker.start()

1148

self.checker_callback_tag = GLib.io_add_watch(

1149

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

1150

self.checker_callback, pipe[0], command)

1151

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

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

1152

730

return True

1153

731

1154

732

def stop_checker(self):

1155

733

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

1156

734

if self.checker_callback_tag:

1157

GLib.source_remove(self.checker_callback_tag)

735

gobject.source_remove(self.checker_callback_tag)

1158

736

self.checker_callback_tag = None

1159

737

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

1160

738

return

1161

739

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

1162

self.checker.terminate()

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

1163

748

self.checker = None

1164

749

1165

750

1166

def dbus_service_property(dbus_interface,

1167

signature="v",

1168

access="readwrite",

1169

byte_arrays=False):

751

def dbus_service_property(dbus_interface, signature="v",

752

access="readwrite", byte_arrays=False):

1170

753

"""Decorators for marking methods of a DBusObjectWithProperties to

1171

754

become properties on the D-Bus.

1172

755

1173

756

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

1174

757

and with one argument by "Set".

1175

758

1176

759

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

1177

760

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

1178

761

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

1181

764

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

1182

765

if byte_arrays and signature != "ay":

1183

766

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

1184

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

1185

767

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

1186

768

def decorator(func):

1187

769

func._dbus_is_property = True

1188

770

func._dbus_interface = dbus_interface

1191

773

func._dbus_name = func.__name__

1192

774

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

1193

775

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

1194

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

776

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1195

777

return func

1196

1197

778

return decorator

1198

779

1199

780

1200

781

def dbus_interface_annotations(dbus_interface):

1201

782

"""Decorator for marking functions returning interface annotations

1202

783

1203

784

Usage:

1204

785

1205

786

@dbus_interface_annotations("org.example.Interface")

1206

787

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

1207

788

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

1208

789

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

1209

790

"false"}

1210

791

"""

1211

1212

792

def decorator(func):

1213

793

func._dbus_is_interface = True

1214

794

func._dbus_interface = dbus_interface

1215

795

func._dbus_name = dbus_interface

1216

796

return func

1217

1218

797

return decorator

1219

798

1220

799

1221

800

def dbus_annotations(annotations):

1222

801

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

1223

802

Usage:

1224

1225

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

1226

"org.freedesktop.DBus.Property."

1227

"EmitsChangedSignal": "false"})

803

1228

804

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

1229

805

access="r")

806

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

807

"org.freedesktop.DBus.Property."

808

"EmitsChangedSignal": "false"})

1230

809

def Property_dbus_property(self):

1231

810

return dbus.Boolean(False)

1232

1233

See also the DBusObjectWithAnnotations class.

1234

811

"""

1235

1236

812

def decorator(func):

1237

813

func._dbus_annotations = annotations

1238

814

return func

1239

1240

815

return decorator

1241

816

1242

817

1243

818

class DBusPropertyException(dbus.exceptions.DBusException):

1244

819

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

1245

820

"""

1246

pass

821

def __unicode__(self):

822

return unicode(str(self))

1247

823

1248

824

1249

825

class DBusPropertyAccessException(DBusPropertyException):

1258

834

pass

1259

835

1260

836

1261

class DBusObjectWithAnnotations(dbus.service.Object):

1262

"""A D-Bus object with annotations.

1263

1264

Classes inheriting from this can use the dbus_annotations

1265

decorator to add annotations to methods or signals.

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.

1266

843

"""

1267

844

1268

845

@staticmethod

1269

846

def _is_dbus_thing(thing):

1270

847

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

1271

848

1272

849

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

1273

850

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

1274

851

"""

1275

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

852

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

1276

853

False)

1277

854

1278

855

def _get_all_dbus_things(self, thing):

1279

856

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

1280

857

"""

1281

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

858

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

859

name),

1282

860

athing.__get__(self))

1283

861

for cls in self.__class__.__mro__

1284

862

for name, athing in

1285

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

1286

1287

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1288

out_signature="s",

1289

path_keyword='object_path',

1290

connection_keyword='connection')

1291

def Introspect(self, object_path, connection):

1292

"""Overloading of standard D-Bus method.

1293

1294

Inserts annotation tags on methods and signals.

1295

"""

1296

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

1297

connection)

1298

try:

1299

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

1300

1301

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

1302

# Add annotation tags

1303

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

1304

for tag in if_tag.getElementsByTagName(typ):

1305

annots = dict()

1306

for name, prop in (self.

1307

_get_all_dbus_things(typ)):

1308

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

1309

and prop._dbus_interface

1310

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

1311

annots.update(getattr(

1312

prop, "_dbus_annotations", {}))

1313

for name, value in annots.items():

1314

ann_tag = document.createElement(

1315

"annotation")

1316

ann_tag.setAttribute("name", name)

1317

ann_tag.setAttribute("value", value)

1318

tag.appendChild(ann_tag)

1319

# Add interface annotation tags

1320

for annotation, value in dict(

1321

itertools.chain.from_iterable(

1322

annotations().items()

1323

for name, annotations

1324

in self._get_all_dbus_things("interface")

1325

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

1326

)).items():

1327

ann_tag = document.createElement("annotation")

1328

ann_tag.setAttribute("name", annotation)

1329

ann_tag.setAttribute("value", value)

1330

if_tag.appendChild(ann_tag)

1331

# Fix argument name for the Introspect method itself

1332

if (if_tag.getAttribute("name")

1333

== dbus.INTROSPECTABLE_IFACE):

1334

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

1335

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

1336

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

1337

if (arg.getAttribute("direction")

1338

== "out"):

1339

arg.setAttribute("name",

1340

"xml_data")

1341

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

1342

document.unlink()

1343

except (AttributeError, xml.dom.DOMException,

1344

xml.parsers.expat.ExpatError) as error:

1345

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

1346

exc_info=error)

1347

return xmlstring

1348

1349

1350

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1351

"""A D-Bus object with properties.

1352

1353

Classes inheriting from this can use the dbus_service_property

1354

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

1355

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

1356

"""

1357

863

inspect.getmembers(cls,

864

self._is_dbus_thing(thing)))

865

1358

866

def _get_dbus_property(self, interface_name, property_name):

1359

867

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

1360

868

property with the specified name and interface.

1361

869

"""

1362

for cls in self.__class__.__mro__:

1363

for name, value in inspect.getmembers(

1364

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

870

for cls in self.__class__.__mro__:

871

for name, value in (inspect.getmembers

872

(cls,

873

self._is_dbus_thing("property"))):

1365

874

if (value._dbus_name == property_name

1366

875

and value._dbus_interface == interface_name):

1367

876

return value.__get__(self)

1368

877

1369

878

# No such property

1370

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

1371

self.dbus_object_path, interface_name, property_name))

1372

1373

@classmethod

1374

def _get_all_interface_names(cls):

1375

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

1376

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

1377

"_dbus_interface", None)

1378

for x in (inspect.getmro(cls))

1379

for attr in dir(x))

1380

if name is not None)

1381

1382

@dbus.service.method(dbus.PROPERTIES_IFACE,

1383

in_signature="ss",

879

raise DBusPropertyNotFound(self.dbus_object_path + ":"

880

+ interface_name + "."

881

+ property_name)

882

883

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

1384

884

out_signature="v")

1385

885

def Get(self, interface_name, property_name):

1386

886

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

1392

892

if not hasattr(value, "variant_level"):

1393

893

return value

1394

894

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

1395

895

1396

896

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

1397

897

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

1398

898

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

1404

904

# The byte_arrays option is not supported yet on

1405

905

# signatures other than "ay".

1406

906

if prop._dbus_signature != "ay":

1407

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

1408

"'ay' signature {!r}"

1409

.format(prop._dbus_signature))

907

raise ValueError

1410

908

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

1411

909

for byte in value))

1412

910

prop(value)

1413

1414

@dbus.service.method(dbus.PROPERTIES_IFACE,

1415

in_signature="s",

911

912

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

1416

913

out_signature="a{sv}")

1417

914

def GetAll(self, interface_name):

1418

915

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

1419

916

standard.

1420

917

1421

918

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

1422

919

"""

1423

920

properties = {}

1433

930

if not hasattr(value, "variant_level"):

1434

931

properties[name] = value

1435

932

continue

1436

properties[name] = type(value)(

1437

value, variant_level=value.variant_level + 1)

933

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

934

value.variant_level+1)

1438

935

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

1439

1440

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

1441

def PropertiesChanged(self, interface_name, changed_properties,

1442

invalidated_properties):

1443

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

1444

standard.

1445

"""

1446

pass

1447

936

1448

937

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1449

938

out_signature="s",

1450

939

path_keyword='object_path',

1451

940

connection_keyword='connection')

1452

941

def Introspect(self, object_path, connection):

1453

942

"""Overloading of standard D-Bus method.

1454

943

1455

944

Inserts property tags and interface annotation tags.

1456

945

"""

1457

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1458

object_path,

1459

connection)

946

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

947

connection)

1460

948

try:

1461

949

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

1462

1463

950

def make_tag(document, name, prop):

1464

951

e = document.createElement("property")

1465

952

e.setAttribute("name", name)

1466

953

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

1467

954

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

1468

955

return e

1469

1470

956

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

1471

957

# Add property tags

1472

958

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

1475

961

if prop._dbus_interface

1476

962

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

1477

963

if_tag.appendChild(tag)

1478

# Add annotation tags for properties

1479

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

1480

annots = dict()

1481

for name, prop in self._get_all_dbus_things(

1482

"property"):

1483

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

1484

and prop._dbus_interface

1485

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

1486

annots.update(getattr(

1487

prop, "_dbus_annotations", {}))

1488

for name, value in annots.items():

1489

ann_tag = document.createElement(

1490

"annotation")

1491

ann_tag.setAttribute("name", name)

1492

ann_tag.setAttribute("value", value)

1493

tag.appendChild(ann_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)

1494

995

# Add the names to the return values for the

1495

996

# "org.freedesktop.DBus.Properties" methods

1496

997

if (if_tag.getAttribute("name")

1515

1016

return xmlstring

1516

1017

1517

1018

1518

try:

1519

dbus.OBJECT_MANAGER_IFACE

1520

except AttributeError:

1521

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

1522

1523

1524

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1525

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

1526

1527

Classes inheriting from this exposes the standard

1528

GetManagedObjects call and the InterfacesAdded and

1529

InterfacesRemoved signals on the standard

1530

"org.freedesktop.DBus.ObjectManager" interface.

1531

1532

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

1533

manually.

1534

"""

1535

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1536

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

1537

def GetManagedObjects(self):

1538

"""This function must be overridden"""

1539

raise NotImplementedError()

1540

1541

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1542

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

1543

def InterfacesAdded(self, object_path, interfaces_and_properties):

1544

pass

1545

1546

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

1547

def InterfacesRemoved(self, object_path, interfaces):

1548

pass

1549

1550

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1551

out_signature="s",

1552

path_keyword='object_path',

1553

connection_keyword='connection')

1554

def Introspect(self, object_path, connection):

1555

"""Overloading of standard D-Bus method.

1556

1557

Override return argument name of GetManagedObjects to be

1558

"objpath_interfaces_and_properties"

1559

"""

1560

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1561

object_path,

1562

connection)

1563

try:

1564

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

1565

1566

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

1567

# Fix argument name for the GetManagedObjects method

1568

if (if_tag.getAttribute("name")

1569

== dbus.OBJECT_MANAGER_IFACE):

1570

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

1571

if (cn.getAttribute("name")

1572

== "GetManagedObjects"):

1573

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

1574

if (arg.getAttribute("direction")

1575

== "out"):

1576

arg.setAttribute(

1577

"name",

1578

"objpath_interfaces"

1579

"_and_properties")

1580

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

1581

document.unlink()

1582

except (AttributeError, xml.dom.DOMException,

1583

xml.parsers.expat.ExpatError) as error:

1584

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

1585

exc_info=error)

1586

return xmlstring

1587

1588

1589

def datetime_to_dbus(dt, variant_level=0):

1019

def datetime_to_dbus (dt, variant_level=0):

1590

1020

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

1591

1021

if dt is None:

1592

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

1593

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

1022

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

1023

return dbus.String(dt.isoformat(),

1024

variant_level=variant_level)

1594

1025

1595

1026

1596

1027

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1598

1029

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

1599

1030

interface names according to the "alt_interface_names" mapping.

1600

1031

Usage:

1601

1602

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

1603

"net.example.AlternateInterface"})

1032

1033

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

1034

"net.example.AlternateInterface"})

1604

1035

class SampleDBusObject(dbus.service.Object):

1605

1036

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

1606

1037

def SampleDBusMethod():

1607

1038

pass

1608

1039

1609

1040

The above "SampleDBusMethod" on "SampleDBusObject" will be

1610

1041

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

1611

1042

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

1612

1043

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

1613

1044

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

1614

1045

1615

1046

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

1616

1047

(from DBusObjectWithProperties) and interfaces (from the

1617

1048

dbus_interface_annotations decorator).

1618

1049

"""

1619

1620

1050

def wrapper(cls):

1621

1051

for orig_interface_name, alt_interface_name in (

1622

alt_interface_names.items()):

1052

alt_interface_names.iteritems()):

1623

1053

attr = {}

1624

1054

interface_names = set()

1625

1055

# Go though all attributes of the class

1627

1057

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

1628

1058

# with the wrong interface name

1629

1059

if (not hasattr(attribute, "_dbus_interface")

1630

or not attribute._dbus_interface.startswith(

1631

orig_interface_name)):

1060

or not attribute._dbus_interface

1061

.startswith(orig_interface_name)):

1632

1062

continue

1633

1063

# Create an alternate D-Bus interface name based on

1634

1064

# the current name

1635

alt_interface = attribute._dbus_interface.replace(

1636

orig_interface_name, alt_interface_name)

1065

alt_interface = (attribute._dbus_interface

1066

.replace(orig_interface_name,

1067

alt_interface_name))

1637

1068

interface_names.add(alt_interface)

1638

1069

# Is this a D-Bus signal?

1639

1070

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

1640

# Extract the original non-method undecorated

1641

# function by black magic

1642

if sys.version_info.major == 2:

1643

nonmethod_func = (dict(

1071

# Extract the original non-method function by

1072

# black magic

1073

nonmethod_func = (dict(

1644

1074

zip(attribute.func_code.co_freevars,

1645

attribute.__closure__))

1646

["func"].cell_contents)

1647

else:

1648

nonmethod_func = (dict(

1649

zip(attribute.__code__.co_freevars,

1650

attribute.__closure__))

1651

["func"].cell_contents)

1075

attribute.__closure__))["func"]

1076

.cell_contents)

1652

1077

# Create a new, but exactly alike, function

1653

1078

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

1654

1079

# with the alternate D-Bus interface name

1655

new_function = copy_function(nonmethod_func)

1656

new_function = (dbus.service.signal(

1657

alt_interface,

1658

attribute._dbus_signature)(new_function))

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)))

1659

1089

# Copy annotations, if any

1660

1090

try:

1661

new_function._dbus_annotations = dict(

1662

attribute._dbus_annotations)

1091

new_function._dbus_annotations = (

1092

dict(attribute._dbus_annotations))

1663

1093

except AttributeError:

1664

1094

pass

1665

1666

1095

# Define a creator of a function to call both the

1667

1096

# original and alternate functions, so both the

1668

1097

# original and alternate signals gets sent when

1671

1100

"""This function is a scope container to pass

1672

1101

func1 and func2 to the "call_both" function

1673

1102

outside of its arguments"""

1674

1675

@functools.wraps(func2)

1676

1103

def call_both(*args, **kwargs):

1677

1104

"""This function will emit two D-Bus

1678

1105

signals by calling func1 and func2"""

1679

1106

func1(*args, **kwargs)

1680

1107

func2(*args, **kwargs)

1681

# Make wrapper function look like a D-Bus

1682

# signal

1683

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

1684

if name.startswith("_dbus_"):

1685

setattr(call_both, name, attr)

1686

1687

1108

return call_both

1688

1109

# Create the "call_both" function and add it to

1689

1110

# the class

1694

1115

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

1695

1116

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

1696

1117

# to the class.

1697

attr[attrname] = (

1698

dbus.service.method(

1699

alt_interface,

1700

attribute._dbus_in_signature,

1701

attribute._dbus_out_signature)

1702

(copy_function(attribute)))

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)))

1703

1128

# Copy annotations, if any

1704

1129

try:

1705

attr[attrname]._dbus_annotations = dict(

1706

attribute._dbus_annotations)

1130

attr[attrname]._dbus_annotations = (

1131

dict(attribute._dbus_annotations))

1707

1132

except AttributeError:

1708

1133

pass

1709

1134

# Is this a D-Bus property?

1712

1137

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

1713

1138

# property with the alternate D-Bus interface

1714

1139

# name. Add it to the class.

1715

attr[attrname] = (dbus_service_property(

1716

alt_interface, attribute._dbus_signature,

1717

attribute._dbus_access,

1718

attribute._dbus_get_args_options

1719

["byte_arrays"])

1720

(copy_function(attribute)))

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)))

1721

1153

# Copy annotations, if any

1722

1154

try:

1723

attr[attrname]._dbus_annotations = dict(

1724

attribute._dbus_annotations)

1155

attr[attrname]._dbus_annotations = (

1156

dict(attribute._dbus_annotations))

1725

1157

except AttributeError:

1726

1158

pass

1727

1159

# Is this a D-Bus interface?

1730

1162

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

1731

1163

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

1732

1164

# to the class.

1733

attr[attrname] = (

1734

dbus_interface_annotations(alt_interface)

1735

(copy_function(attribute)))

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)))

1736

1173

if deprecate:

1737

1174

# Deprecate all alternate interfaces

1738

iname = "_AlternateDBusNames_interface_annotation{}"

1175

iname="_AlternateDBusNames_interface_annotation{0}"

1739

1176

for interface_name in interface_names:

1740

1741

1177

@dbus_interface_annotations(interface_name)

1742

1178

def func(self):

1743

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

1744

"true"}

1179

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

1180

"true" }

1745

1181

# Find an unused name

1746

1182

for aname in (iname.format(i)

1747

1183

for i in itertools.count()):

1751

1187

if interface_names:

1752

1188

# Replace the class with a new subclass of it with

1753

1189

# methods, signals, etc. as created above.

1754

if sys.version_info.major == 2:

1755

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

1756

(cls, ), attr)

1757

else:

1758

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

1759

(cls, ), attr)

1190

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

1191

(cls,), attr)

1760

1192

return cls

1761

1762

1193

return wrapper

1763

1194

1764

1195

1765

1196

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

1766

"se.bsnet.fukt.Mandos"})

1197

"se.bsnet.fukt.Mandos"})

1767

1198

class ClientDBus(Client, DBusObjectWithProperties):

1768

1199

"""A Client class using D-Bus

1769

1200

1770

1201

Attributes:

1771

1202

dbus_object_path: dbus.ObjectPath

1772

1203

bus: dbus.SystemBus()

1773

1204

"""

1774

1205

1775

1206

runtime_expansions = (Client.runtime_expansions

1776

+ ("dbus_object_path", ))

1777

1778

_interface = "se.recompile.Mandos.Client"

1779

1207

+ ("dbus_object_path",))

1208

1780

1209

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

1781

1782

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

1210

1211

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

1783

1212

self.bus = bus

1784

1213

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

1785

1214

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

1786

1215

# the D-Bus

1787

client_object_name = str(self.name).translate(

1216

client_object_name = unicode(self.name).translate(

1788

1217

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

1789

1218

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

1790

self.dbus_object_path = dbus.ObjectPath(

1791

"/clients/" + client_object_name)

1219

self.dbus_object_path = (dbus.ObjectPath

1220

("/clients/" + client_object_name))

1792

1221

DBusObjectWithProperties.__init__(self, self.bus,

1793

1222

self.dbus_object_path)

1794

1795

def notifychangeproperty(transform_func, dbus_name,

1796

type_func=lambda x: x,

1797

variant_level=1,

1798

invalidate_only=False,

1799

_interface=_interface):

1223

1224

def notifychangeproperty(transform_func,

1225

dbus_name, type_func=lambda x: x,

1226

variant_level=1):

1800

1227

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

1801

1228

its changes to DBus.

1802

1229

1803

1230

transform_fun: Function that takes a value and a variant_level

1804

1231

and transforms it to a D-Bus type.

1805

1232

dbus_name: D-Bus name of the variable

1807

1234

to the D-Bus. Default: no transform

1808

1235

variant_level: D-Bus variant level. Default: 1

1809

1236

"""

1810

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

1811

1237

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

1812

1238

def setter(self, value):

1813

1239

if hasattr(self, "dbus_object_path"):

1814

1240

if (not hasattr(self, attrname) or

1815

1241

type_func(getattr(self, attrname, None))

1816

1242

!= type_func(value)):

1817

if invalidate_only:

1818

self.PropertiesChanged(

1819

_interface, dbus.Dictionary(),

1820

dbus.Array((dbus_name, )))

1821

else:

1822

dbus_value = transform_func(

1823

type_func(value),

1824

variant_level=variant_level)

1825

self.PropertyChanged(dbus.String(dbus_name),

1826

dbus_value)

1827

self.PropertiesChanged(

1828

_interface,

1829

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

1830

dbus_value}),

1831

dbus.Array())

1243

dbus_value = transform_func(type_func(value),

1244

variant_level

1245

=variant_level)

1246

self.PropertyChanged(dbus.String(dbus_name),

1247

dbus_value)

1832

1248

setattr(self, attrname, value)

1833

1249

1834

1250

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

1835

1251

1836

1252

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1837

1253

approvals_pending = notifychangeproperty(dbus.Boolean,

1838

1254

"ApprovalPending",

1839

type_func=bool)

1255

type_func = bool)

1840

1256

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

1841

1257

last_enabled = notifychangeproperty(datetime_to_dbus,

1842

1258

"LastEnabled")

1843

checker = notifychangeproperty(

1844

dbus.Boolean, "CheckerRunning",

1845

type_func=lambda checker: checker is not None)

1259

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

1260

type_func = lambda checker:

1261

checker is not None)

1846

1262

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1847

1263

"LastCheckedOK")

1848

1264

last_checker_status = notifychangeproperty(dbus.Int16,

1851

1267

datetime_to_dbus, "LastApprovalRequest")

1852

1268

approved_by_default = notifychangeproperty(dbus.Boolean,

1853

1269

"ApprovedByDefault")

1854

approval_delay = notifychangeproperty(

1855

dbus.UInt64, "ApprovalDelay",

1856

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

1270

approval_delay = notifychangeproperty(dbus.UInt64,

1271

"ApprovalDelay",

1272

type_func =

1273

timedelta_to_milliseconds)

1857

1274

approval_duration = notifychangeproperty(

1858

1275

dbus.UInt64, "ApprovalDuration",

1859

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

1276

type_func = timedelta_to_milliseconds)

1860

1277

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

1861

timeout = notifychangeproperty(

1862

dbus.UInt64, "Timeout",

1863

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

1278

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

1279

type_func =

1280

timedelta_to_milliseconds)

1864

1281

extended_timeout = notifychangeproperty(

1865

1282

dbus.UInt64, "ExtendedTimeout",

1866

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

1867

interval = notifychangeproperty(

1868

dbus.UInt64, "Interval",

1869

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

1283

type_func = timedelta_to_milliseconds)

1284

interval = notifychangeproperty(dbus.UInt64,

1285

"Interval",

1286

type_func =

1287

timedelta_to_milliseconds)

1870

1288

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

1871

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

1872

invalidate_only=True)

1873

1289

1874

1290

del notifychangeproperty

1875

1291

1876

1292

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

1877

1293

try:

1878

1294

self.remove_from_connection()

1881

1297

if hasattr(DBusObjectWithProperties, "__del__"):

1882

1298

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

1883

1299

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

1884

1885

def checker_callback(self, source, condition,

1886

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

1887

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

1888

connection, command, *args,

1889

**kwargs)

1890

exitstatus = self.last_checker_status

1891

if exitstatus >= 0:

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)

1892

1307

# Emit D-Bus signal

1893

1308

self.CheckerCompleted(dbus.Int16(exitstatus),

1894

# This is specific to GNU libC

1895

dbus.Int64(exitstatus << 8),

1309

dbus.Int64(condition),

1896

1310

dbus.String(command))

1897

1311

else:

1898

1312

# Emit D-Bus signal

1899

1313

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

1900

dbus.Int64(

1901

# This is specific to GNU libC

1902

(exitstatus << 8)

1903

| self.last_checker_signal),

1314

dbus.Int64(condition),

1904

1315

dbus.String(command))

1905

return ret

1906

1316

1317

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

1318

*args, **kwargs)

1319

1907

1320

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

1908

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

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

1909

1326

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

1910

1327

# Only if new checker process was started

1911

1328

if (self.checker is not None

1913

1330

# Emit D-Bus signal

1914

1331

self.CheckerStarted(self.current_checker_command)

1915

1332

return r

1916

1333

1917

1334

def _reset_approved(self):

1918

1335

self.approved = None

1919

1336

return False

1920

1337

1921

1338

def approve(self, value=True):

1922

1339

self.approved = value

1923

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

1924

* 1000), self._reset_approved)

1340

gobject.timeout_add(timedelta_to_milliseconds

1341

(self.approval_duration),

1342

self._reset_approved)

1925

1343

self.send_changedstate()

1926

1927

# D-Bus methods, signals & properties

1928

1929

# Interfaces

1930

1931

# Signals

1932

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

1933

1357

# CheckerCompleted - signal

1934

1358

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

1935

1359

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

1936

1360

"D-Bus signal"

1937

1361

pass

1938

1362

1939

1363

# CheckerStarted - signal

1940

1364

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

1941

1365

def CheckerStarted(self, command):

1942

1366

"D-Bus signal"

1943

1367

pass

1944

1368

1945

1369

# PropertyChanged - signal

1946

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

1947

1370

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

1948

1371

def PropertyChanged(self, property, value):

1949

1372

"D-Bus signal"

1950

1373

pass

1951

1374

1952

1375

# GotSecret - signal

1953

1376

@dbus.service.signal(_interface)

1954

1377

def GotSecret(self):

1957

1380

server to mandos-client

1958

1381

"""

1959

1382

pass

1960

1383

1961

1384

# Rejected - signal

1962

1385

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

1963

1386

def Rejected(self, reason):

1964

1387

"D-Bus signal"

1965

1388

pass

1966

1389

1967

1390

# NeedApproval - signal

1968

1391

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

1969

1392

def NeedApproval(self, timeout, default):

1970

1393

"D-Bus signal"

1971

1394

return self.need_approval()

1972

1973

# Methods

1974

1395

1396

## Methods

1397

1975

1398

# Approve - method

1976

1399

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

1977

1400

def Approve(self, value):

1978

1401

self.approve(value)

1979

1402

1980

1403

# CheckedOK - method

1981

1404

@dbus.service.method(_interface)

1982

1405

def CheckedOK(self):

1983

1406

self.checked_ok()

1984

1407

1985

1408

# Enable - method

1986

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

1987

1409

@dbus.service.method(_interface)

1988

1410

def Enable(self):

1989

1411

"D-Bus method"

1990

1412

self.enable()

1991

1413

1992

1414

# StartChecker - method

1993

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

1994

1415

@dbus.service.method(_interface)

1995

1416

def StartChecker(self):

1996

1417

"D-Bus method"

1997

1418

self.start_checker()

1998

1419

1999

1420

# Disable - method

2000

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

2001

1421

@dbus.service.method(_interface)

2002

1422

def Disable(self):

2003

1423

"D-Bus method"

2004

1424

self.disable()

2005

1425

2006

1426

# StopChecker - method

2007

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

2008

1427

@dbus.service.method(_interface)

2009

1428

def StopChecker(self):

2010

1429

self.stop_checker()

2011

2012

# Properties

2013

1430

1431

## Properties

1432

2014

1433

# ApprovalPending - property

2015

1434

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

2016

1435

def ApprovalPending_dbus_property(self):

2017

1436

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

2018

1437

2019

1438

# ApprovedByDefault - property

2020

@dbus_service_property(_interface,

2021

signature="b",

1439

@dbus_service_property(_interface, signature="b",

2022

1440

access="readwrite")

2023

1441

def ApprovedByDefault_dbus_property(self, value=None):

2024

1442

if value is None: # get

2025

1443

return dbus.Boolean(self.approved_by_default)

2026

1444

self.approved_by_default = bool(value)

2027

1445

2028

1446

# ApprovalDelay - property

2029

@dbus_service_property(_interface,

2030

signature="t",

1447

@dbus_service_property(_interface, signature="t",

2031

1448

access="readwrite")

2032

1449

def ApprovalDelay_dbus_property(self, value=None):

2033

1450

if value is None: # get

2034

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

2035

* 1000)

1451

return dbus.UInt64(self.approval_delay_milliseconds())

2036

1452

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

2037

1453

2038

1454

# ApprovalDuration - property

2039

@dbus_service_property(_interface,

2040

signature="t",

1455

@dbus_service_property(_interface, signature="t",

2041

1456

access="readwrite")

2042

1457

def ApprovalDuration_dbus_property(self, value=None):

2043

1458

if value is None: # get

2044

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

2045

* 1000)

1459

return dbus.UInt64(timedelta_to_milliseconds(

1460

self.approval_duration))

2046

1461

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

2047

1462

2048

1463

# Name - property

2049

@dbus_annotations(

2050

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

2051

1464

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

2052

1465

def Name_dbus_property(self):

2053

1466

return dbus.String(self.name)

2054

2055

# KeyID - property

2056

@dbus_annotations(

2057

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

2058

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

2059

def KeyID_dbus_property(self):

2060

return dbus.String(self.key_id)

2061

1467

2062

1468

# Fingerprint - property

2063

@dbus_annotations(

2064

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

2065

1469

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

2066

1470

def Fingerprint_dbus_property(self):

2067

1471

return dbus.String(self.fingerprint)

2068

1472

2069

1473

# Host - property

2070

@dbus_service_property(_interface,

2071

signature="s",

1474

@dbus_service_property(_interface, signature="s",

2072

1475

access="readwrite")

2073

1476

def Host_dbus_property(self, value=None):

2074

1477

if value is None: # get

2075

1478

return dbus.String(self.host)

2076

self.host = str(value)

2077

1479

self.host = unicode(value)

1480

2078

1481

# Created - property

2079

@dbus_annotations(

2080

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

2081

1482

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

2082

1483

def Created_dbus_property(self):

2083

1484

return datetime_to_dbus(self.created)

2084

1485

2085

1486

# LastEnabled - property

2086

1487

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

2087

1488

def LastEnabled_dbus_property(self):

2088

1489

return datetime_to_dbus(self.last_enabled)

2089

1490

2090

1491

# Enabled - property

2091

@dbus_service_property(_interface,

2092

signature="b",

1492

@dbus_service_property(_interface, signature="b",

2093

1493

access="readwrite")

2094

1494

def Enabled_dbus_property(self, value=None):

2095

1495

if value is None: # get

2098

1498

self.enable()

2099

1499

else:

2100

1500

self.disable()

2101

1501

2102

1502

# LastCheckedOK - property

2103

@dbus_service_property(_interface,

2104

signature="s",

1503

@dbus_service_property(_interface, signature="s",

2105

1504

access="readwrite")

2106

1505

def LastCheckedOK_dbus_property(self, value=None):

2107

1506

if value is not None:

2108

1507

self.checked_ok()

2109

1508

return

2110

1509

return datetime_to_dbus(self.last_checked_ok)

2111

1510

2112

1511

# LastCheckerStatus - property

2113

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

1512

@dbus_service_property(_interface, signature="n",

1513

access="read")

2114

1514

def LastCheckerStatus_dbus_property(self):

2115

1515

return dbus.Int16(self.last_checker_status)

2116

1516

2117

1517

# Expires - property

2118

1518

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

2119

1519

def Expires_dbus_property(self):

2120

1520

return datetime_to_dbus(self.expires)

2121

1521

2122

1522

# LastApprovalRequest - property

2123

1523

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

2124

1524

def LastApprovalRequest_dbus_property(self):

2125

1525

return datetime_to_dbus(self.last_approval_request)

2126

1526

2127

1527

# Timeout - property

2128

@dbus_service_property(_interface,

2129

signature="t",

1528

@dbus_service_property(_interface, signature="t",

2130

1529

access="readwrite")

2131

1530

def Timeout_dbus_property(self, value=None):

2132

1531

if value is None: # get

2133

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

1532

return dbus.UInt64(self.timeout_milliseconds())

2134

1533

old_timeout = self.timeout

2135

1534

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

2136

1535

# Reschedule disabling

2144

1543

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

2145

1544

is None):

2146

1545

return

2147

GLib.source_remove(self.disable_initiator_tag)

2148

self.disable_initiator_tag = GLib.timeout_add(

2149

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

2150

self.disable)

2151

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

2152

1552

# ExtendedTimeout - property

2153

@dbus_service_property(_interface,

2154

signature="t",

1553

@dbus_service_property(_interface, signature="t",

2155

1554

access="readwrite")

2156

1555

def ExtendedTimeout_dbus_property(self, value=None):

2157

1556

if value is None: # get

2158

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

2159

* 1000)

1557

return dbus.UInt64(self.extended_timeout_milliseconds())

2160

1558

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

2161

1559

2162

1560

# Interval - property

2163

@dbus_service_property(_interface,

2164

signature="t",

1561

@dbus_service_property(_interface, signature="t",

2165

1562

access="readwrite")

2166

1563

def Interval_dbus_property(self, value=None):

2167

1564

if value is None: # get

2168

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

1565

return dbus.UInt64(self.interval_milliseconds())

2169

1566

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

2170

1567

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

2171

1568

return

2172

1569

if self.enabled:

2173

1570

# Reschedule checker run

2174

GLib.source_remove(self.checker_initiator_tag)

2175

self.checker_initiator_tag = GLib.timeout_add(

2176

value, self.start_checker)

2177

self.start_checker() # Start one now, too

2178

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

2179

1576

# Checker - property

2180

@dbus_service_property(_interface,

2181

signature="s",

1577

@dbus_service_property(_interface, signature="s",

2182

1578

access="readwrite")

2183

1579

def Checker_dbus_property(self, value=None):

2184

1580

if value is None: # get

2185

1581

return dbus.String(self.checker_command)

2186

self.checker_command = str(value)

2187

1582

self.checker_command = unicode(value)

1583

2188

1584

# CheckerRunning - property

2189

@dbus_service_property(_interface,

2190

signature="b",

1585

@dbus_service_property(_interface, signature="b",

2191

1586

access="readwrite")

2192

1587

def CheckerRunning_dbus_property(self, value=None):

2193

1588

if value is None: # get

2196

1591

self.start_checker()

2197

1592

else:

2198

1593

self.stop_checker()

2199

1594

2200

1595

# ObjectPath - property

2201

@dbus_annotations(

2202

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

2203

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

2204

1596

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

2205

1597

def ObjectPath_dbus_property(self):

2206

return self.dbus_object_path # is already a dbus.ObjectPath

2207

1598

return self.dbus_object_path # is already a dbus.ObjectPath

1599

2208

1600

# Secret = property

2209

@dbus_annotations(

2210

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

2211

"invalidates"})

2212

@dbus_service_property(_interface,

2213

signature="ay",

2214

access="write",

2215

byte_arrays=True)

1601

@dbus_service_property(_interface, signature="ay",

1602

access="write", byte_arrays=True)

2216

1603

def Secret_dbus_property(self, value):

2217

self.secret = bytes(value)

2218

1604

self.secret = str(value)

1605

2219

1606

del _interface

2220

1607

2221

1608

2222

1609

class ProxyClient(object):

2223

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

1610

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

2224

1611

self._pipe = child_pipe

2225

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

1612

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

2226

1613

if not self._pipe.recv():

2227

raise KeyError(key_id or fpr)

2228

1614

raise KeyError()

1615

2229

1616

def __getattribute__(self, name):

2230

1617

if name == '_pipe':

2231

1618

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

2234

1621

if data[0] == 'data':

2235

1622

return data[1]

2236

1623

if data[0] == 'function':

2237

2238

1624

def func(*args, **kwargs):

2239

1625

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

2240

1626

return self._pipe.recv()[1]

2241

2242

1627

return func

2243

1628

2244

1629

def __setattr__(self, name, value):

2245

1630

if name == '_pipe':

2246

1631

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

2249

1634

2250

1635

class ClientHandler(socketserver.BaseRequestHandler, object):

2251

1636

"""A class to handle client connections.

2252

1637

2253

1638

Instantiated once for each connection to handle it.

2254

1639

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

2255

1640

2256

1641

def handle(self):

2257

1642

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

2258

1643

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

2259

str(self.client_address))

1644

unicode(self.client_address))

2260

1645

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

2261

1646

self.server.child_pipe.fileno())

2262

2263

session = gnutls.ClientSession(self.request)

2264

2265

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

2266

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

2267

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

2268

# "+DHE-DSS"))

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"))

2269

1662

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

2270

1663

priority = self.server.gnutls_priority

2271

1664

if priority is None:

2272

1665

priority = "NORMAL"

2273

gnutls.priority_set_direct(session._c_object,

2274

priority.encode("utf-8"),

2275

None)

2276

1666

(gnutls.library.functions

1667

.gnutls_priority_set_direct(session._c_object,

1668

priority, None))

1669

2277

1670

# Start communication using the Mandos protocol

2278

1671

# Get protocol number

2279

1672

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

2280

1673

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

2281

1674

try:

2282

1675

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

2283

raise RuntimeError(line)

1676

raise RuntimeError

2284

1677

except (ValueError, IndexError, RuntimeError) as error:

2285

1678

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

2286

1679

return

2287

1680

2288

1681

# Start GnuTLS connection

2289

1682

try:

2290

1683

session.handshake()

2291

except gnutls.Error as error:

1684

except gnutls.errors.GNUTLSError as error:

2292

1685

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

2293

1686

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

2294

1687

# established. Just abandon the request.

2295

1688

return

2296

1689

logger.debug("Handshake succeeded")

2297

1690

2298

1691

approval_required = False

2299

1692

try:

2300

if gnutls.has_rawpk:

2301

fpr = ""

2302

try:

2303

key_id = self.key_id(

2304

self.peer_certificate(session))

2305

except (TypeError, gnutls.Error) as error:

2306

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

2307

return

2308

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

2309

2310

else:

2311

key_id = ""

2312

try:

2313

fpr = self.fingerprint(

2314

self.peer_certificate(session))

2315

except (TypeError, gnutls.Error) as error:

2316

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

2317

return

2318

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

2319

2320

try:

2321

client = ProxyClient(child_pipe, key_id, fpr,

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,

2322

1704

self.client_address)

2323

1705

except KeyError:

2324

1706

return

2325

1707

2326

1708

if client.approval_delay:

2327

1709

delay = client.approval_delay

2328

1710

client.approvals_pending += 1

2329

1711

approval_required = True

2330

1712

2331

1713

while True:

2332

1714

if not client.enabled:

2333

1715

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

2334

client.name)

1716

client.name)

2335

1717

if self.server.use_dbus:

2336

1718

# Emit D-Bus signal

2337

1719

client.Rejected("Disabled")

2338

1720

return

2339

1721

2340

1722

if client.approved or not client.approval_delay:

2341

# We are approved or approval is disabled

1723

#We are approved or approval is disabled

2342

1724

break

2343

1725

elif client.approved is None:

2344

1726

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

2346

1728

if self.server.use_dbus:

2347

1729

# Emit D-Bus signal

2348

1730

client.NeedApproval(

2349

client.approval_delay.total_seconds()

2350

* 1000, client.approved_by_default)

1731

client.approval_delay_milliseconds(),

1732

client.approved_by_default)

2351

1733

else:

2352

1734

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

2353

1735

client.name)

2355

1737

# Emit D-Bus signal

2356

1738

client.Rejected("Denied")

2357

1739

return

2358

2359

# wait until timeout or approved

1740

1741

#wait until timeout or approved

2360

1742

time = datetime.datetime.now()

2361

1743

client.changedstate.acquire()

2362

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

1744

client.changedstate.wait(

1745

float(timedelta_to_milliseconds(delay)

1746

/ 1000))

2363

1747

client.changedstate.release()

2364

1748

time2 = datetime.datetime.now()

2365

1749

if (time2 - time) >= delay:

2375

1759

break

2376

1760

else:

2377

1761

delay -= time2 - time

2378

2379

try:

2380

session.send(client.secret)

2381

except gnutls.Error as error:

2382

logger.warning("gnutls send failed",

2383

exc_info=error)

2384

return

2385

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

2386

1776

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

2387

1777

# bump the timeout using extended_timeout

2388

1778

client.bump_timeout(client.extended_timeout)

2389

1779

if self.server.use_dbus:

2390

1780

# Emit D-Bus signal

2391

1781

client.GotSecret()

2392

1782

2393

1783

finally:

2394

1784

if approval_required:

2395

1785

client.approvals_pending -= 1

2396

1786

try:

2397

1787

session.bye()

2398

except gnutls.Error as error:

1788

except gnutls.errors.GNUTLSError as error:

2399

1789

logger.warning("GnuTLS bye failed",

2400

1790

exc_info=error)

2401

1791

2402

1792

@staticmethod

2403

1793

def peer_certificate(session):

2404

"Return the peer's certificate as a bytestring"

2405

try:

2406

cert_type = gnutls.certificate_type_get2(session._c_object,

2407

gnutls.CTYPE_PEERS)

2408

except AttributeError:

2409

cert_type = gnutls.certificate_type_get(session._c_object)

2410

if gnutls.has_rawpk:

2411

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2412

else:

2413

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2414

# If not a valid certificate type...

2415

if cert_type not in valid_cert_types:

2416

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

2417

valid_cert_types)

2418

# ...return invalid data

2419

return b""

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

2420

1801

list_size = ctypes.c_uint(1)

2421

cert_list = (gnutls.certificate_get_peers

1802

cert_list = (gnutls.library.functions

1803

.gnutls_certificate_get_peers

2422

1804

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

2423

1805

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

2424

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

1806

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

1807

" certificate")

2425

1808

if list_size.value == 0:

2426

1809

return None

2427

1810

cert = cert_list[0]

2428

1811

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

2429

2430

@staticmethod

2431

def key_id(certificate):

2432

"Convert a certificate bytestring to a hexdigit key ID"

2433

# New GnuTLS "datum" with the public key

2434

datum = gnutls.datum_t(

2435

ctypes.cast(ctypes.c_char_p(certificate),

2436

ctypes.POINTER(ctypes.c_ubyte)),

2437

ctypes.c_uint(len(certificate)))

2438

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

2439

# New empty GnuTLS certificate

2440

pubkey = gnutls.pubkey_t()

2441

gnutls.pubkey_init(ctypes.byref(pubkey))

2442

# Import the raw public key into the certificate

2443

gnutls.pubkey_import(pubkey,

2444

ctypes.byref(datum),

2445

gnutls.X509_FMT_DER)

2446

# New buffer for the key ID

2447

buf = ctypes.create_string_buffer(32)

2448

buf_len = ctypes.c_size_t(len(buf))

2449

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

2450

gnutls.pubkey_get_key_id(pubkey,

2451

gnutls.KEYID_USE_SHA256,

2452

ctypes.cast(ctypes.byref(buf),

2453

ctypes.POINTER(ctypes.c_ubyte)),

2454

ctypes.byref(buf_len))

2455

# Deinit the certificate

2456

gnutls.pubkey_deinit(pubkey)

2457

2458

# Convert the buffer to a Python bytestring

2459

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

2460

# Convert the bytestring to hexadecimal notation

2461

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

2462

return hex_key_id

2463

1812

2464

1813

@staticmethod

2465

1814

def fingerprint(openpgp):

2466

1815

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2467

1816

# New GnuTLS "datum" with the OpenPGP public key

2468

datum = gnutls.datum_t(

2469

ctypes.cast(ctypes.c_char_p(openpgp),

2470

ctypes.POINTER(ctypes.c_ubyte)),

2471

ctypes.c_uint(len(openpgp)))

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))))

2472

1822

# New empty GnuTLS certificate

2473

crt = gnutls.openpgp_crt_t()

2474

gnutls.openpgp_crt_init(ctypes.byref(crt))

1823

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1824

(gnutls.library.functions

1825

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2475

1826

# Import the OpenPGP public key into the certificate

2476

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

2477

gnutls.OPENPGP_FMT_RAW)

1827

(gnutls.library.functions

1828

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

1829

gnutls.library.constants

1830

.GNUTLS_OPENPGP_FMT_RAW))

2478

1831

# Verify the self signature in the key

2479

1832

crtverify = ctypes.c_uint()

2480

gnutls.openpgp_crt_verify_self(crt, 0,

2481

ctypes.byref(crtverify))

1833

(gnutls.library.functions

1834

.gnutls_openpgp_crt_verify_self(crt, 0,

1835

ctypes.byref(crtverify)))

2482

1836

if crtverify.value != 0:

2483

gnutls.openpgp_crt_deinit(crt)

2484

raise gnutls.CertificateSecurityError(code

2485

=crtverify.value)

1837

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1838

raise (gnutls.errors.CertificateSecurityError

1839

("Verify failed"))

2486

1840

# New buffer for the fingerprint

2487

1841

buf = ctypes.create_string_buffer(20)

2488

1842

buf_len = ctypes.c_size_t()

2489

1843

# Get the fingerprint from the certificate into the buffer

2490

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

2491

ctypes.byref(buf_len))

1844

(gnutls.library.functions

1845

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

1846

ctypes.byref(buf_len)))

2492

1847

# Deinit the certificate

2493

gnutls.openpgp_crt_deinit(crt)

1848

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2494

1849

# Convert the buffer to a Python bytestring

2495

1850

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

2496

1851

# Convert the bytestring to hexadecimal notation

2500

1855

2501

1856

class MultiprocessingMixIn(object):

2502

1857

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

2503

2504

1858

def sub_process_main(self, request, address):

2505

1859

try:

2506

1860

self.finish_request(request, address)

2507

1861

except Exception:

2508

1862

self.handle_error(request, address)

2509

1863

self.close_request(request)

2510

1864

2511

1865

def process_request(self, request, address):

2512

1866

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

2513

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

2514

args=(request, address))

1867

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

1868

args = (request, address))

2515

1869

proc.start()

2516

1870

return proc

2517

1871

2518

1872

2519

1873

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2520

1874

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

2521

2522

1875

def process_request(self, request, client_address):

2523

1876

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

2524

1877

2525

1878

This function creates a new pipe in self.pipe

2526

1879

"""

2527

1880

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2528

1881

2529

1882

proc = MultiprocessingMixIn.process_request(self, request,

2530

1883

client_address)

2531

1884

self.child_pipe.close()

2532

1885

self.add_pipe(parent_pipe, proc)

2533

1886

2534

1887

def add_pipe(self, parent_pipe, proc):

2535

1888

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

2536

raise NotImplementedError()

1889

raise NotImplementedError

2537

1890

2538

1891

2539

1892

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2540

1893

socketserver.TCPServer, object):

2541

1894

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

2542

1895

2543

1896

Attributes:

2544

1897

enabled: Boolean; whether this server is activated yet

2545

1898

interface: None or a network interface name (string)

2546

1899

use_ipv6: Boolean; to use IPv6 or not

2547

1900

"""

2548

2549

1901

def __init__(self, server_address, RequestHandlerClass,

2550

interface=None,

2551

use_ipv6=True,

2552

socketfd=None):

2553

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

2554

creating a new one with socket.socket().

2555

"""

1902

interface=None, use_ipv6=True):

2556

1903

self.interface = interface

2557

1904

if use_ipv6:

2558

1905

self.address_family = socket.AF_INET6

2559

if socketfd is not None:

2560

# Save the file descriptor

2561

self.socketfd = socketfd

2562

# Save the original socket.socket() function

2563

self.socket_socket = socket.socket

2564

2565

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

2566

#

2567

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

2568

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

2569

# patching socket.socket.)

2570

#

2571

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

2572

@functools.wraps(socket.socket)

2573

def socket_wrapper(*args, **kwargs):

2574

# Restore original function so subsequent calls are

2575

# not affected.

2576

socket.socket = self.socket_socket

2577

del self.socket_socket

2578

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

2579

# saved file descriptor.

2580

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

2581

# Replace socket.socket() function with wrapper

2582

socket.socket = socket_wrapper

2583

# The socketserver.TCPServer.__init__ will call

2584

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

2585

# socket_wrapper(), if socketfd was set.

2586

1906

socketserver.TCPServer.__init__(self, server_address,

2587

1907

RequestHandlerClass)

2588

2589

1908

def server_bind(self):

2590

1909

"""This overrides the normal server_bind() function

2591

1910

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

2592

1911

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

2593

global SO_BINDTODEVICE

2594

1912

if self.interface is not None:

2595

1913

if SO_BINDTODEVICE is None:

2596

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

2597

# common enough.

2598

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

2599

SO_BINDTODEVICE = 25

2600

try:

2601

self.socket.setsockopt(

2602

socket.SOL_SOCKET, SO_BINDTODEVICE,

2603

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

2604

except socket.error as error:

2605

if error.errno == errno.EPERM:

2606

logger.error("No permission to bind to"

2607

" interface %s", self.interface)

2608

elif error.errno == errno.ENOPROTOOPT:

2609

logger.error("SO_BINDTODEVICE not available;"

2610

" cannot bind to interface %s",

2611

self.interface)

2612

elif error.errno == errno.ENODEV:

2613

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

2614

" cannot bind", self.interface)

2615

else:

2616

raise

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

2617

1938

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

2618

1939

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

2619

1940

if not self.server_address[0]:

2620

1941

if self.address_family == socket.AF_INET6:

2621

any_address = "::" # in6addr_any

1942

any_address = "::" # in6addr_any

2622

1943

else:

2623

any_address = "0.0.0.0" # INADDR_ANY

1944

any_address = socket.INADDR_ANY

2624

1945

self.server_address = (any_address,

2625

1946

self.server_address[1])

2626

1947

elif not self.server_address[1]:

2627

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

1948

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

1949

0)

2628

1950

# if self.interface:

2629

1951

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

2630

1952

# 0, # port

2636

1958

2637

1959

class MandosServer(IPv6_TCPServer):

2638

1960

"""Mandos server.

2639

1961

2640

1962

Attributes:

2641

1963

clients: set of Client objects

2642

1964

gnutls_priority GnuTLS priority string

2643

1965

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

2644

2645

Assumes a GLib.MainLoop event loop.

1966

1967

Assumes a gobject.MainLoop event loop.

2646

1968

"""

2647

2648

1969

def __init__(self, server_address, RequestHandlerClass,

2649

interface=None,

2650

use_ipv6=True,

2651

clients=None,

2652

gnutls_priority=None,

2653

use_dbus=True,

2654

socketfd=None):

1970

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

1971

gnutls_priority=None, use_dbus=True):

2655

1972

self.enabled = False

2656

1973

self.clients = clients

2657

1974

if self.clients is None:

2660

1977

self.gnutls_priority = gnutls_priority

2661

1978

IPv6_TCPServer.__init__(self, server_address,

2662

1979

RequestHandlerClass,

2663

interface=interface,

2664

use_ipv6=use_ipv6,

2665

socketfd=socketfd)

2666

1980

interface = interface,

1981

use_ipv6 = use_ipv6)

2667

1982

def server_activate(self):

2668

1983

if self.enabled:

2669

1984

return socketserver.TCPServer.server_activate(self)

2670

1985

2671

1986

def enable(self):

2672

1987

self.enabled = True

2673

1988

2674

1989

def add_pipe(self, parent_pipe, proc):

2675

1990

# Call "handle_ipc" for both data and EOF events

2676

GLib.io_add_watch(

2677

parent_pipe.fileno(),

2678

GLib.IO_IN | GLib.IO_HUP,

2679

functools.partial(self.handle_ipc,

2680

parent_pipe=parent_pipe,

2681

proc=proc))

2682

2683

def handle_ipc(self, source, condition,

2684

parent_pipe=None,

2685

proc=None,

2686

client_object=None):

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):

2687

2000

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

2688

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

2001

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

2689

2002

# Wait for other process to exit

2690

2003

proc.join()

2691

2004

return False

2692

2005

2693

2006

# Read a request from the child

2694

2007

request = parent_pipe.recv()

2695

2008

command = request[0]

2696

2009

2697

2010

if command == 'init':

2698

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

2699

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

2700

address = request[3]

2701

2702

for c in self.clients.values():

2703

if key_id and c.key_id == key_id:

2704

client = c

2705

break

2706

if fpr and c.fingerprint == fpr:

2011

fpr = request[1]

2012

address = request[2]

2013

2014

for c in self.clients.itervalues():

2015

if c.fingerprint == fpr:

2707

2016

client = c

2708

2017

break

2709

2018

else:

2710

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

2711

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

2019

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

2020

"dress: %s", fpr, address)

2712

2021

if self.use_dbus:

2713

2022

# Emit D-Bus signal

2714

mandos_dbus_service.ClientNotFound(key_id or fpr,

2023

mandos_dbus_service.ClientNotFound(fpr,

2715

2024

address[0])

2716

2025

parent_pipe.send(False)

2717

2026

return False

2718

2719

GLib.io_add_watch(

2720

parent_pipe.fileno(),

2721

GLib.IO_IN | GLib.IO_HUP,

2722

functools.partial(self.handle_ipc,

2723

parent_pipe=parent_pipe,

2724

proc=proc,

2725

client_object=client))

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))

2726

2036

parent_pipe.send(True)

2727

2037

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

2728

2038

# same fileno

2731

2041

funcname = request[1]

2732

2042

args = request[2]

2733

2043

kwargs = request[3]

2734

2044

2735

2045

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

2736

2046

funcname)(*args,

2737

**kwargs)))

2738

2047

**kwargs)))

2048

2739

2049

if command == 'getattr':

2740

2050

attrname = request[1]

2741

if isinstance(client_object.__getattribute__(attrname),

2742

collections.Callable):

2743

parent_pipe.send(('function', ))

2051

if callable(client_object.__getattribute__(attrname)):

2052

parent_pipe.send(('function',))

2744

2053

else:

2745

parent_pipe.send((

2746

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

2747

2054

parent_pipe.send(('data', client_object

2055

.__getattribute__(attrname)))

2056

2748

2057

if command == 'setattr':

2749

2058

attrname = request[1]

2750

2059

value = request[2]

2751

2060

setattr(client_object, attrname, value)

2752

2061

2753

2062

return True

2754

2063

2755

2064

2756

def rfc3339_duration_to_delta(duration):

2757

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

2758

2759

>>> rfc3339_duration_to_delta("P7D")

2760

datetime.timedelta(7)

2761

>>> rfc3339_duration_to_delta("PT60S")

2762

datetime.timedelta(0, 60)

2763

>>> rfc3339_duration_to_delta("PT60M")

2764

datetime.timedelta(0, 3600)

2765

>>> rfc3339_duration_to_delta("PT24H")

2766

datetime.timedelta(1)

2767

>>> rfc3339_duration_to_delta("P1W")

2768

datetime.timedelta(7)

2769

>>> rfc3339_duration_to_delta("PT5M30S")

2770

datetime.timedelta(0, 330)

2771

>>> rfc3339_duration_to_delta("P1DT3M20S")

2772

datetime.timedelta(1, 200)

2773

"""

2774

2775

# Parsing an RFC 3339 duration with regular expressions is not

2776

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

2777

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

2778

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

2779

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

2780

# avoid excessive use of external libraries.

2781

2782

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

2783

Token = collections.namedtuple("Token", (

2784

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

2785

# a "group" containing digits

2786

"value", # datetime.timedelta or None

2787

"followers")) # Tokens valid after this token

2788

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

2789

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

2790

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

2791

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

2792

datetime.timedelta(seconds=1),

2793

frozenset((token_end, )))

2794

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

2795

datetime.timedelta(minutes=1),

2796

frozenset((token_second, token_end)))

2797

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

2798

datetime.timedelta(hours=1),

2799

frozenset((token_minute, token_end)))

2800

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

2801

None,

2802

frozenset((token_hour, token_minute,

2803

token_second)))

2804

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

2805

datetime.timedelta(days=1),

2806

frozenset((token_time, token_end)))

2807

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

2808

datetime.timedelta(weeks=4),

2809

frozenset((token_day, token_end)))

2810

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

2811

datetime.timedelta(weeks=52),

2812

frozenset((token_month, token_end)))

2813

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

2814

datetime.timedelta(weeks=1),

2815

frozenset((token_end, )))

2816

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

2817

frozenset((token_year, token_month,

2818

token_day, token_time,

2819

token_week)))

2820

# Define starting values:

2821

# Value so far

2822

value = datetime.timedelta()

2823

found_token = None

2824

# Following valid tokens

2825

followers = frozenset((token_duration, ))

2826

# String left to parse

2827

s = duration

2828

# Loop until end token is found

2829

while found_token is not token_end:

2830

# Search for any currently valid tokens

2831

for token in followers:

2832

match = token.regexp.match(s)

2833

if match is not None:

2834

# Token found

2835

if token.value is not None:

2836

# Value found, parse digits

2837

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

2838

# Add to value so far

2839

value += factor * token.value

2840

# Strip token from string

2841

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

2842

# Go to found token

2843

found_token = token

2844

# Set valid next tokens

2845

followers = found_token.followers

2846

break

2847

else:

2848

# No currently valid tokens were found

2849

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

2850

.format(duration))

2851

# End token found

2852

return value

2853

2854

2855

2065

def string_to_delta(interval):

2856

2066

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

2857

2067

2858

2068

>>> string_to_delta('7d')

2859

2069

datetime.timedelta(7)

2860

2070

>>> string_to_delta('60s')

2868

2078

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

2869

2079

datetime.timedelta(0, 330)

2870

2080

"""

2871

2872

try:

2873

return rfc3339_duration_to_delta(interval)

2874

except ValueError:

2875

pass

2876

2877

2081

timevalue = datetime.timedelta(0)

2878

2082

for s in interval.split():

2879

2083

try:

2880

suffix = s[-1]

2084

suffix = unicode(s[-1])

2881

2085

value = int(s[:-1])

2882

2086

if suffix == "d":

2883

2087

delta = datetime.timedelta(value)

2890

2094

elif suffix == "w":

2891

2095

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

2892

2096

else:

2893

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

2894

except IndexError as e:

2097

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

2098

.format(suffix))

2099

except (ValueError, IndexError) as e:

2895

2100

raise ValueError(*(e.args))

2896

2101

timevalue += delta

2897

2102

return timevalue

2898

2103

2899

2104

2900

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

2105

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

2901

2106

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

2902

2107

2903

2108

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

2904

2109

if os.fork():

2905

2110

sys.exit()

2913

2118

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

2914

2119

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

2915

2120

raise OSError(errno.ENODEV,

2916

"{} not a character device"

2121

"{0} not a character device"

2917

2122

.format(os.devnull))

2918

2123

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

2919

2124

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

2923

2128

2924

2129

2925

2130

def main():

2926

2131

2927

2132

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

2928

2133

# Parsing of options, both command line and config file

2929

2134

2930

2135

parser = argparse.ArgumentParser()

2931

2136

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

2932

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

2137

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

2933

2138

help="show version number and exit")

2934

2139

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

2935

2140

help="Bind to interface IF")

2941

2146

help="Run self-test")

2942

2147

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

2943

2148

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

2944

" to terminal", default=None)

2149

" to terminal")

2945

2150

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

2946

2151

help="Debug level for stdout output")

2947

2152

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

2954

2159

" files")

2955

2160

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

2956

2161

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

2957

" system bus interface", default=None)

2162

" system bus interface")

2958

2163

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

2959

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

2960

default=None)

2164

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

2961

2165

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

2962

2166

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

2963

" state", default=None)

2964

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

2965

help="Specify a file descriptor to a network"

2966

" socket to use instead of creating one")

2167

" state")

2967

2168

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

2968

2169

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

2969

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

2970

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

2971

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

2972

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

2973

default=None)

2974

2170

2975

2171

options = parser.parse_args()

2976

2172

2977

2173

if options.check:

2978

2174

import doctest

2979

fail_count, test_count = doctest.testmod()

2980

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

2981

2175

doctest.testmod()

2176

sys.exit()

2177

2982

2178

# Default values for config file for server-global settings

2983

if gnutls.has_rawpk:

2984

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

2985

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

2986

else:

2987

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

2988

":+SIGN-DSA-SHA256")

2989

server_defaults = {"interface": "",

2990

"address": "",

2991

"port": "",

2992

"debug": "False",

2993

"priority": priority,

2994

"servicename": "Mandos",

2995

"use_dbus": "True",

2996

"use_ipv6": "True",

2997

"debuglevel": "",

2998

"restore": "True",

2999

"socket": "",

3000

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

3001

"foreground": "False",

3002

"zeroconf": "True",

3003

}

3004

del priority

3005

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

3006

2193

# Parse config file for server-global settings

3007

2194

server_config = configparser.SafeConfigParser(server_defaults)

3008

2195

del server_defaults

3009

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

2196

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

2197

"mandos.conf"))

3010

2198

# Convert the SafeConfigParser object to a dict

3011

2199

server_settings = server_config.defaults()

3012

2200

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

3013

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

3014

"foreground", "zeroconf"):

2201

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

3015

2202

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

3016

2203

option)

3017

2204

if server_settings["port"]:

3018

2205

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

3019

2206

"port")

3020

if server_settings["socket"]:

3021

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

3022

"socket")

3023

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

3024

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

3025

# happen with a supplied network socket.

3026

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

3027

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

3028

["socket"])

3029

2207

del server_config

3030

2208

3031

2209

# Override the settings from the config file with command line

3032

2210

# options, if set.

3033

2211

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

3034

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

3035

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

3036

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

2212

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

2213

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

2214

"statedir"):

3037

2215

value = getattr(options, option)

3038

2216

if value is not None:

3039

2217

server_settings[option] = value

3040

2218

del options

3041

2219

# Force all strings to be unicode

3042

2220

for option in server_settings.keys():

3043

if isinstance(server_settings[option], bytes):

3044

server_settings[option] = (server_settings[option]

3045

.decode("utf-8"))

3046

# Force all boolean options to be boolean

3047

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

3048

"foreground", "zeroconf"):

3049

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

3050

# Debug implies foreground

3051

if server_settings["debug"]:

3052

server_settings["foreground"] = True

2221

if type(server_settings[option]) is str:

2222

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

3053

2223

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

3054

2224

3055

2225

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

3056

3057

if (not server_settings["zeroconf"]

3058

and not (server_settings["port"]

3059

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

3060

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

3061

2226

3062

2227

# For convenience

3063

2228

debug = server_settings["debug"]

3064

2229

debuglevel = server_settings["debuglevel"]

3066

2231

use_ipv6 = server_settings["use_ipv6"]

3067

2232

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

3068

2233

stored_state_file)

3069

foreground = server_settings["foreground"]

3070

zeroconf = server_settings["zeroconf"]

3071

2234

3072

2235

if debug:

3073

2236

initlogger(debug, logging.DEBUG)

3074

2237

else:

3077

2240

else:

3078

2241

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

3079

2242

initlogger(debug, level)

3080

2243

3081

2244

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

3082

syslogger.setFormatter(

3083

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

3084

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

3085

server_settings["servicename"])))

3086

2245

syslogger.setFormatter(logging.Formatter

2246

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

2247

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

2248

.format(server_settings

2249

["servicename"])))

2250

3087

2251

# Parse config file with clients

3088

2252

client_config = configparser.SafeConfigParser(Client

3089

2253

.client_defaults)

3090

2254

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

3091

2255

"clients.conf"))

3092

2256

3093

2257

global mandos_dbus_service

3094

2258

mandos_dbus_service = None

3095

3096

socketfd = None

3097

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

3098

socketfd = server_settings["socket"]

3099

tcp_server = MandosServer(

3100

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

3101

ClientHandler,

3102

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

3103

use_ipv6=use_ipv6,

3104

gnutls_priority=server_settings["priority"],

3105

use_dbus=use_dbus,

3106

socketfd=socketfd)

3107

if not foreground:

3108

pidfilename = "/run/mandos.pid"

3109

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

3110

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

3111

pidfile = 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"

3112

2271

try:

3113

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

2272

pidfile = open(pidfilename, "w")

3114

2273

except IOError as e:

3115

2274

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

3116

2275

exc_info=e)

3117

3118

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

3119

("mandos", "mandos"),

3120

("nobody", "nogroup")):

2276

2277

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

3121

2278

try:

3122

2279

uid = pwd.getpwnam(name).pw_uid

3123

gid = pwd.getpwnam(group).pw_gid

2280

gid = pwd.getpwnam(name).pw_gid

3124

2281

break

3125

2282

except KeyError:

3126

2283

continue

3130

2287

try:

3131

2288

os.setgid(gid)

3132

2289

os.setuid(uid)

3133

if debug:

3134

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

3135

gid))

3136

2290

except OSError as error:

3137

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

3138

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

3139

2291

if error.errno != errno.EPERM:

3140

raise

3141

2292

raise error

2293

3142

2294

if debug:

3143

2295

# Enable all possible GnuTLS debugging

3144

2296

3145

2297

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

3146

2298

# - GnuTLS manual

3147

gnutls.global_set_log_level(11)

3148

3149

@gnutls.log_func

2299

gnutls.library.functions.gnutls_global_set_log_level(11)

2300

2301

@gnutls.library.types.gnutls_log_func

3150

2302

def debug_gnutls(level, string):

3151

2303

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

3152

3153

gnutls.global_set_log_function(debug_gnutls)

3154

2304

2305

(gnutls.library.functions

2306

.gnutls_global_set_log_function(debug_gnutls))

2307

3155

2308

# Redirect stdin so all checkers get /dev/null

3156

2309

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

3157

2310

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

3158

2311

if null > 2:

3159

2312

os.close(null)

3160

2313

3161

2314

# Need to fork before connecting to D-Bus

3162

if not foreground:

2315

if not debug:

3163

2316

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

3164

2317

daemon()

3165

3166

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

3167

# to inform GLib that threads will be used.

3168

GLib.threads_init()

3169

2318

2319

gobject.threads_init()

2320

3170

2321

global main_loop

3171

2322

# From the Avahi example code

3172

2323

DBusGMainLoop(set_as_default=True)

3173

main_loop = GLib.MainLoop()

2324

main_loop = gobject.MainLoop()

3174

2325

bus = dbus.SystemBus()

3175

2326

# End of Avahi example code

3176

2327

if use_dbus:

3177

2328

try:

3178

2329

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

3179

bus,

3180

do_not_queue=True)

3181

old_bus_name = dbus.service.BusName(

3182

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

3183

do_not_queue=True)

3184

except dbus.exceptions.DBusException as e:

2330

bus, do_not_queue=True)

2331

old_bus_name = (dbus.service.BusName

2332

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

2333

do_not_queue=True))

2334

except dbus.exceptions.NameExistsException as e:

3185

2335

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

3186

2336

use_dbus = False

3187

2337

server_settings["use_dbus"] = False

3188

2338

tcp_server.use_dbus = False

3189

if zeroconf:

3190

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3191

service = AvahiServiceToSyslog(

3192

name=server_settings["servicename"],

3193

servicetype="_mandos._tcp",

3194

protocol=protocol,

3195

bus=bus)

3196

if server_settings["interface"]:

3197

service.interface = if_nametoindex(

3198

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

3199

2339

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2340

service = AvahiServiceToSyslog(name =

2341

server_settings["servicename"],

2342

servicetype = "_mandos._tcp",

2343

protocol = protocol, bus = bus)

2344

if server_settings["interface"]:

2345

service.interface = (if_nametoindex

2346

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

2347

3200

2348

global multiprocessing_manager

3201

2349

multiprocessing_manager = multiprocessing.Manager()

3202

2350

3203

2351

client_class = Client

3204

2352

if use_dbus:

3205

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

3206

2353

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

2354

3207

2355

client_settings = Client.config_parser(client_config)

3208

2356

old_client_settings = {}

3209

2357

clients_data = {}

3210

3211

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

3212

global wnull

3213

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

3214

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

3215

# mode

3216

if debug or not foreground:

3217

wnull.close()

3218

2358

3219

2359

# Get client data and settings from last running state.

3220

2360

if server_settings["restore"]:

3221

2361

try:

3222

2362

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

3223

if sys.version_info.major == 2:

3224

clients_data, old_client_settings = pickle.load(

3225

stored_state)

3226

else:

3227

bytes_clients_data, bytes_old_client_settings = (

3228

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

3229

# Fix bytes to strings

3230

# clients_data

3231

# .keys()

3232

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

3233

if isinstance(key, bytes)

3234

else key): value

3235

for key, value in

3236

bytes_clients_data.items()}

3237

del bytes_clients_data

3238

for key in clients_data:

3239

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

3240

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

3241

for k, v in

3242

clients_data[key].items()}

3243

clients_data[key] = value

3244

# .client_structure

3245

value["client_structure"] = [

3246

(s.decode("utf-8")

3247

if isinstance(s, bytes)

3248

else s) for s in

3249

value["client_structure"]]

3250

# .name & .host

3251

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

3252

if isinstance(value[k], bytes):

3253

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

3254

if not value.has_key("key_id"):

3255

value["key_id"] = ""

3256

elif not value.has_key("fingerprint"):

3257

value["fingerprint"] = ""

3258

# old_client_settings

3259

# .keys()

3260

old_client_settings = {

3261

(key.decode("utf-8")

3262

if isinstance(key, bytes)

3263

else key): value

3264

for key, value in

3265

bytes_old_client_settings.items()}

3266

del bytes_old_client_settings

3267

# .host

3268

for value in old_client_settings.values():

3269

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

3270

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

3271

.decode("utf-8"))

2363

clients_data, old_client_settings = (pickle.load

2364

(stored_state))

3272

2365

os.remove(stored_state_path)

3273

2366

except IOError as e:

3274

2367

if e.errno == errno.ENOENT:

3275

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

3276

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

2368

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

2369

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

3277

2370

else:

3278

2371

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

3279

2372

exc_info=e)

3280

2373

raise

3281

2374

except EOFError as e:

3282

2375

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

3283

"EOFError:",

3284

exc_info=e)

3285

2376

"EOFError:", exc_info=e)

2377

3286

2378

with PGPEngine() as pgp:

3287

for client_name, client in clients_data.items():

3288

# Skip removed clients

3289

if client_name not in client_settings:

3290

continue

3291

2379

for client_name, client in clients_data.iteritems():

3292

2380

# Decide which value to use after restoring saved state.

3293

2381

# We have three different values: Old config file,

3294

2382

# new config file, and saved state.

3299

2387

# For each value in new config, check if it

3300

2388

# differs from the old config value (Except for

3301

2389

# the "secret" attribute)

3302

if (name != "secret"

3303

and (value !=

3304

old_client_settings[client_name][name])):

2390

if (name != "secret" and

2391

value != old_client_settings[client_name]

2392

[name]):

3305

2393

client[name] = value

3306

2394

except KeyError:

3307

2395

pass

3308

2396

3309

2397

# Clients who has passed its expire date can still be

3310

# enabled if its last checker was successful. A Client

2398

# enabled if its last checker was successful. Clients

3311

2399

# whose checker succeeded before we stored its state is

3312

2400

# assumed to have successfully run all checkers during

3313

2401

# downtime.

3315

2403

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

3316

2404

if not client["last_checked_ok"]:

3317

2405

logger.warning(

3318

"disabling client {} - Client never "

3319

"performed a successful checker".format(

3320

client_name))

2406

"disabling client {0} - Client never "

2407

"performed a successful checker"

2408

.format(client_name))

3321

2409

client["enabled"] = False

3322

2410

elif client["last_checker_status"] != 0:

3323

2411

logger.warning(

3324

"disabling client {} - Client last"

3325

" checker failed with error code"

3326

" {}".format(

3327

client_name,

3328

client["last_checker_status"]))

2412

"disabling client {0} - Client "

2413

"last checker failed with error code {1}"

2414

.format(client_name,

2415

client["last_checker_status"]))

3329

2416

client["enabled"] = False

3330

2417

else:

3331

client["expires"] = (

3332

datetime.datetime.utcnow()

3333

+ client["timeout"])

2418

client["expires"] = (datetime.datetime

2419

.utcnow()

2420

+ client["timeout"])

3334

2421

logger.debug("Last checker succeeded,"

3335

" keeping {} enabled".format(

3336

client_name))

2422

" keeping {0} enabled"

2423

.format(client_name))

3337

2424

try:

3338

client["secret"] = pgp.decrypt(

3339

client["encrypted_secret"],

3340

client_settings[client_name]["secret"])

2425

client["secret"] = (

2426

pgp.decrypt(client["encrypted_secret"],

2427

client_settings[client_name]

2428

["secret"]))

3341

2429

except PGPError:

3342

2430

# If decryption fails, we use secret from new settings

3343

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

3344

client_name))

3345

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

3346

["secret"])

3347

2431

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

2432

.format(client_name))

2433

client["secret"] = (

2434

client_settings[client_name]["secret"])

2435

3348

2436

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

3349

2437

for client_name in (set(old_client_settings)

3350

2438

- set(client_settings)):

3352

2440

for client_name in (set(client_settings)

3353

2441

- set(old_client_settings)):

3354

2442

clients_data[client_name] = client_settings[client_name]

3355

2443

3356

2444

# Create all client objects

3357

for client_name, client in clients_data.items():

2445

for client_name, client in clients_data.iteritems():

3358

2446

tcp_server.clients[client_name] = client_class(

3359

name=client_name,

3360

settings=client,

3361

server_settings=server_settings)

3362

2447

name = client_name, settings = client)

2448

3363

2449

if not tcp_server.clients:

3364

2450

logger.warning("No clients defined")

3365

3366

if not foreground:

3367

if pidfile is not None:

3368

pid = os.getpid()

3369

try:

3370

with pidfile:

3371

print(pid, file=pidfile)

3372

except IOError:

3373

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

3374

pidfilename, pid)

3375

del pidfile

2451

2452

if not debug:

2453

try:

2454

with pidfile:

2455

pid = os.getpid()

2456

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

2457

del pidfile

2458

except IOError:

2459

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

2460

pidfilename, pid)

2461

except NameError:

2462

# "pidfile" was never created

2463

pass

3376

2464

del pidfilename

3377

3378

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

3379

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3380

lambda: main_loop.quit() and False)

3381

2465

2466

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

2467

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

2468

3382

2469

if use_dbus:

3383

3384

@alternate_dbus_interfaces(

3385

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

3386

class MandosDBusService(DBusObjectWithObjectManager):

2470

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

2471

"se.bsnet.fukt.Mandos"})

2472

class MandosDBusService(DBusObjectWithProperties):

3387

2473

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

3388

3389

2474

def __init__(self):

3390

2475

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

3391

3392

2476

_interface = "se.recompile.Mandos"

3393

2477

2478

@dbus_interface_annotations(_interface)

2479

def _foo(self):

2480

return { "org.freedesktop.DBus.Property"

2481

".EmitsChangedSignal":

2482

"false"}

2483

3394

2484

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

3395

2485

def ClientAdded(self, objpath):

3396

2486

"D-Bus signal"

3397

2487

pass

3398

2488

3399

2489

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

3400

def ClientNotFound(self, key_id, address):

2490

def ClientNotFound(self, fingerprint, address):

3401

2491

"D-Bus signal"

3402

2492

pass

3403

3404

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

3405

"true"})

2493

3406

2494

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

3407

2495

def ClientRemoved(self, objpath, name):

3408

2496

"D-Bus signal"

3409

2497

pass

3410

3411

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

3412

"true"})

2498

3413

2499

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

3414

2500

def GetAllClients(self):

3415

2501

"D-Bus method"

3416

return dbus.Array(c.dbus_object_path for c in

3417

tcp_server.clients.values())

3418

3419

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

3420

"true"})

2502

return dbus.Array(c.dbus_object_path

2503

for c in

2504

tcp_server.clients.itervalues())

2505

3421

2506

@dbus.service.method(_interface,

3422

2507

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

3423

2508

def GetAllClientsWithProperties(self):

3424

2509

"D-Bus method"

3425

2510

return dbus.Dictionary(

3426

{c.dbus_object_path: c.GetAll(

3427

"se.recompile.Mandos.Client")

3428

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

2511

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

2512

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

3429

2513

signature="oa{sv}")

3430

2514

3431

2515

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

3432

2516

def RemoveClient(self, object_path):

3433

2517

"D-Bus method"

3434

for c in tcp_server.clients.values():

2518

for c in tcp_server.clients.itervalues():

3435

2519

if c.dbus_object_path == object_path:

3436

2520

del tcp_server.clients[c.name]

3437

2521

c.remove_from_connection()

3438

# Don't signal the disabling

2522

# Don't signal anything except ClientRemoved

3439

2523

c.disable(quiet=True)

3440

# Emit D-Bus signal for removal

3441

self.client_removed_signal(c)

2524

# Emit D-Bus signal

2525

self.ClientRemoved(object_path, c.name)

3442

2526

return

3443

2527

raise KeyError(object_path)

3444

2528

3445

2529

del _interface

3446

3447

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3448

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

3449

def GetManagedObjects(self):

3450

"""D-Bus method"""

3451

return dbus.Dictionary(

3452

{client.dbus_object_path:

3453

dbus.Dictionary(

3454

{interface: client.GetAll(interface)

3455

for interface in

3456

client._get_all_interface_names()})

3457

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

3458

3459

def client_added_signal(self, client):

3460

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

3461

if use_dbus:

3462

# New standard signal

3463

self.InterfacesAdded(

3464

client.dbus_object_path,

3465

dbus.Dictionary(

3466

{interface: client.GetAll(interface)

3467

for interface in

3468

client._get_all_interface_names()}))

3469

# Old signal

3470

self.ClientAdded(client.dbus_object_path)

3471

3472

def client_removed_signal(self, client):

3473

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

3474

if use_dbus:

3475

# New standard signal

3476

self.InterfacesRemoved(

3477

client.dbus_object_path,

3478

client._get_all_interface_names())

3479

# Old signal

3480

self.ClientRemoved(client.dbus_object_path,

3481

client.name)

3482

2530

3483

2531

mandos_dbus_service = MandosDBusService()

3484

3485

# Save modules to variables to exempt the modules from being

3486

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

3487

mp = multiprocessing

3488

wn = wnull

3489

2532

3490

2533

def cleanup():

3491

2534

"Cleanup function; run on exit"

3492

if zeroconf:

3493

service.cleanup()

3494

3495

mp.active_children()

3496

wn.close()

2535

service.cleanup()

2536

2537

multiprocessing.active_children()

3497

2538

if not (tcp_server.clients or client_settings):

3498

2539

return

3499

2540

3500

2541

# Store client before exiting. Secrets are encrypted with key

3501

2542

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

3502

2543

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

3503

2544

clients = {}

3504

2545

with PGPEngine() as pgp:

3505

for client in tcp_server.clients.values():

2546

for client in tcp_server.clients.itervalues():

3506

2547

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

3507

2548

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

3508

2549

key)

3509

2550

client_dict = {}

3510

2551

3511

2552

# A list of attributes that can not be pickled

3512

2553

# + secret.

3513

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

3514

"checker", "server_settings"}

3515

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

3516

.Object):

2554

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

2555

"checker"))

2556

for name, typ in (inspect.getmembers

2557

(dbus.service.Object)):

3517

2558

exclude.add(name)

3518

2559

3519

2560

client_dict["encrypted_secret"] = (client

3520

2561

.encrypted_secret)

3521

2562

for attr in client.client_structure:

3522

2563

if attr not in exclude:

3523

2564

client_dict[attr] = getattr(client, attr)

3524

2565

3525

2566

clients[client.name] = client_dict

3526

2567

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

3527

2568

3528

2569

try:

3529

with tempfile.NamedTemporaryFile(

3530

mode='wb',

3531

suffix=".pickle",

3532

prefix='clients-',

3533

dir=os.path.dirname(stored_state_path),

3534

delete=False) as stored_state:

3535

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

3536

protocol=2)

3537

tempname = stored_state.name

2570

with (tempfile.NamedTemporaryFile

2571

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

2572

dir=os.path.dirname(stored_state_path),

2573

delete=False)) as stored_state:

2574

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

2575

tempname=stored_state.name

3538

2576

os.rename(tempname, stored_state_path)

3539

2577

except (IOError, OSError) as e:

3540

2578

if not debug:

3543

2581

except NameError:

3544

2582

pass

3545

2583

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

3546

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

2584

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

3547

2585

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

3548

2586

else:

3549

2587

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

3550

2588

exc_info=e)

3551

raise

3552

2589

raise e

2590

3553

2591

# Delete all clients, and settings from config

3554

2592

while tcp_server.clients:

3555

2593

name, client = tcp_server.clients.popitem()

3556

2594

if use_dbus:

3557

2595

client.remove_from_connection()

3558

# Don't signal the disabling

2596

# Don't signal anything except ClientRemoved

3559

2597

client.disable(quiet=True)

3560

# Emit D-Bus signal for removal

3561

2598

if use_dbus:

3562

mandos_dbus_service.client_removed_signal(client)

2599

# Emit D-Bus signal

2600

mandos_dbus_service.ClientRemoved(client

2601

.dbus_object_path,

2602

client.name)

3563

2603

client_settings.clear()

3564

2604

3565

2605

atexit.register(cleanup)

3566

3567

for client in tcp_server.clients.values():

2606

2607

for client in tcp_server.clients.itervalues():

3568

2608

if use_dbus:

3569

# Emit D-Bus signal for adding

3570

mandos_dbus_service.client_added_signal(client)

2609

# Emit D-Bus signal

2610

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3571

2611

# Need to initiate checking of clients

3572

2612

if client.enabled:

3573

2613

client.init_checker()

3574

2614

3575

2615

tcp_server.enable()

3576

2616

tcp_server.server_activate()

3577

2617

3578

2618

# Find out what port we got

3579

if zeroconf:

3580

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

2619

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

3581

2620

if use_ipv6:

3582

2621

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

3583

2622

" flowinfo %d, scope_id %d",

3585

2624

else: # IPv4

3586

2625

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

3587

2626

*tcp_server.socket.getsockname())

3588

3589

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

3590

2627

2628

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

2629

3591

2630

try:

3592

if zeroconf:

3593

# From the Avahi example code

3594

try:

3595

service.activate()

3596

except dbus.exceptions.DBusException as error:

3597

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

3598

cleanup()

3599

sys.exit(1)

3600

# End of Avahi example code

3601

3602

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

3603

lambda *args, **kwargs:

3604

(tcp_server.handle_request

3605

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

3606

2631

# From the Avahi example code

2632

try:

2633

service.activate()

2634

except dbus.exceptions.DBusException as error:

2635

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

2636

cleanup()

2637

sys.exit(1)

2638

# End of Avahi example code

2639

2640

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

2641

lambda *args, **kwargs:

2642

(tcp_server.handle_request

2643

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

2644

3607

2645

logger.debug("Starting main loop")

3608

2646

main_loop.run()

3609

2647

except AvahiError as error:

3618

2656

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

3619

2657

cleanup()

3620

2658

3621

3622

2659

if __name__ == '__main__':

3623

2660

main()