/mandos/release : revision 237.7.709

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#!/usr/bin/python

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

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#

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#

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

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#

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#

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

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# service publisher, downloaded from

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

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

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

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

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#

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#

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# Everything else is

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#

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

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

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#

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# This file is part of Mandos.

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#

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

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

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

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# (at your option) any later version.

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#

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

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

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

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# WITHOUT ANY WARRANTY; without even the implied warranty of

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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# GNU General Public License for more details.

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#

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#

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

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# along with this program. If not, see

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

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#

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

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#

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

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#

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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try:

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from future_builtins import *

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except ImportError:

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pass

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import SocketServer as socketserver

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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import cPickle as pickle

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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import gobject

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import avahi

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import gi

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from gi.repository import GLib

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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if sys.version_info.major == 2:

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__metaclass__ = type

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# Try to find the value of SO_BINDTODEVICE:

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try:

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

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

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except AttributeError:

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try:

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# This is where SO_BINDTODEVICE was up to and including Python

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# 2.6, and also 3.2:

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from IN import SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.6.2"

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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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if sys.version_info < (3, 2):

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configparser.Configparser = configparser.SafeConfigParser

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version = "1.8.7"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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

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

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return interface_index

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def copy_function(func):

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

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility=logging.handlers.SysLogHandler.LOG_DAEMON,

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address="/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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pass

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class PGPEngine(object):

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class PGPEngine:

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

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def __init__(self):

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

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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'--quiet']

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

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

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

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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topdown=False):

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for filename in files:

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

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for dirname in dirs:

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir=self.tempdir

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) as passfile:

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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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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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir = self.tempdir

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) as passfile:

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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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

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= data)

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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283

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# Pretend that we have an Avahi module

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class avahi:

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

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

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

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

291

DBUS_NAME = "org.freedesktop.Avahi"

292

DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

294

DBUS_PATH_SERVER = "/"

295

296

@staticmethod

297

def string_array_to_txt_array(t):

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

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

300

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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309

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class AvahiError(Exception):

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

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self.value = value

224

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

225

def __unicode__(self):

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return unicode(repr(self.value))

313

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

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**kwargs)

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class AvahiServiceError(AvahiError):

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pass

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320

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class AvahiGroupError(AvahiError):

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pass

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class AvahiService(object):

325

class AvahiService:

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"""An Avahi (Zeroconf) service.

237

327

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328

Attributes:

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329

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

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Used to optionally bind to the specified interface.

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

345

346

def __init__(self,

347

interface=avahi.IF_UNSPEC,

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name=None,

349

servicetype=None,

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port=None,

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TXT=None,

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domain="",

353

host="",

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max_renames=32768,

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protocol=avahi.PROTO_UNSPEC,

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bus=None):

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357

self.interface = interface

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358

self.name = name

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359

self.type = servicetype

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368

self.server = None

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369

self.bus = bus

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370

self.entry_group_state_changed_match = None

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275

def rename(self):

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def rename(self, remove=True):

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

277

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if self.rename_count >= self.max_renames:

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375

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

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376

" after %i retries, exiting.",

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377

self.rename_count)

281

378

raise AvahiServiceError("Too many renames")

282

self.name = unicode(self.server

283

.GetAlternativeServiceName(self.name))

379

self.name = str(

380

self.server.GetAlternativeServiceName(self.name))

381

self.rename_count += 1

284

382

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

285

383

self.name)

286

self.remove()

384

if remove:

385

self.remove()

287

386

try:

288

387

self.add()

289

388

except dbus.exceptions.DBusException as error:

290

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

291

self.cleanup()

292

os._exit(1)

293

self.rename_count += 1

294

389

if (error.get_dbus_name()

390

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

391

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

392

return self.rename(remove=False)

393

else:

394

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

395

self.cleanup()

396

os._exit(1)

397

295

398

def remove(self):

296

399

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

297

400

if self.entry_group_state_changed_match is not None:

299

402

self.entry_group_state_changed_match = None

300

403

if self.group is not None:

301

404

self.group.Reset()

302

405

303

406

def add(self):

304

407

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

305

408

self.remove()

322

425

dbus.UInt16(self.port),

323

426

avahi.string_array_to_txt_array(self.TXT))

324

427

self.group.Commit()

325

428

326

429

def entry_group_state_changed(self, state, error):

327

430

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

328

431

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

329

432

330

433

if state == avahi.ENTRY_GROUP_ESTABLISHED:

331

434

logger.debug("Zeroconf service established.")

332

435

elif state == avahi.ENTRY_GROUP_COLLISION:

334

437

self.rename()

335

438

elif state == avahi.ENTRY_GROUP_FAILURE:

336

439

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

337

unicode(error))

338

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

339

.format(error))

340

440

str(error))

441

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

442

341

443

def cleanup(self):

342

444

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

343

445

if self.group is not None:

348

450

pass

349

451

self.group = None

350

452

self.remove()

351

453

352

454

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

353

455

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

354

456

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

355

bad_states = { avahi.SERVER_INVALID:

356

"Zeroconf server invalid",

357

avahi.SERVER_REGISTERING: None,

358

avahi.SERVER_COLLISION:

359

"Zeroconf server name collision",

360

avahi.SERVER_FAILURE:

361

"Zeroconf server failure" }

457

bad_states = {

458

avahi.SERVER_INVALID: "Zeroconf server invalid",

459

avahi.SERVER_REGISTERING: None,

460

avahi.SERVER_COLLISION: "Zeroconf server name collision",

461

avahi.SERVER_FAILURE: "Zeroconf server failure",

462

}

362

463

if state in bad_states:

363

464

if bad_states[state] is not None:

364

465

if error is None:

367

468

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

368

469

self.cleanup()

369

470

elif state == avahi.SERVER_RUNNING:

370

self.add()

471

try:

472

self.add()

473

except dbus.exceptions.DBusException as error:

474

if (error.get_dbus_name()

475

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

476

logger.info("Local Zeroconf service name"

477

" collision.")

478

return self.rename(remove=False)

479

else:

480

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

481

self.cleanup()

482

os._exit(1)

371

483

else:

372

484

if error is None:

373

485

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

374

486

else:

375

487

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

376

488

377

489

def activate(self):

378

490

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

379

491

if self.server is None:

383

495

follow_name_owner_changes=True),

384

496

avahi.DBUS_INTERFACE_SERVER)

385

497

self.server.connect_to_signal("StateChanged",

386

self.server_state_changed)

498

self.server_state_changed)

387

499

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

388

500

389

501

390

502

class AvahiServiceToSyslog(AvahiService):

391

def rename(self):

503

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

392

504

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

393

ret = AvahiService.rename(self)

394

syslogger.setFormatter(logging.Formatter

395

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

396

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

397

.format(self.name)))

505

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

506

syslogger.setFormatter(logging.Formatter(

507

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

508

.format(self.name)))

398

509

return ret

399

510

400

511

401

def timedelta_to_milliseconds(td):

402

"Convert a datetime.timedelta() to milliseconds"

403

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

404

+ (td.seconds * 1000)

405

+ (td.microseconds // 1000))

406

407

408

class Client(object):

512

# Pretend that we have a GnuTLS module

513

class gnutls:

514

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

515

516

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

517

if library is None:

518

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

519

_library = ctypes.cdll.LoadLibrary(library)

520

del library

521

522

# Unless otherwise indicated, the constants and types below are

523

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

524

525

# Constants

526

E_SUCCESS = 0

527

E_INTERRUPTED = -52

528

E_AGAIN = -28

529

CRT_OPENPGP = 2

530

CRT_RAWPK = 3

531

CLIENT = 2

532

SHUT_RDWR = 0

533

CRD_CERTIFICATE = 1

534

E_NO_CERTIFICATE_FOUND = -49

535

X509_FMT_DER = 0

536

NO_TICKETS = 1<<10

537

ENABLE_RAWPK = 1<<18

538

CTYPE_PEERS = 3

539

KEYID_USE_SHA256 = 1 # gnutls/x509.h

540

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

541

542

# Types

543

class session_int(ctypes.Structure):

544

_fields_ = []

545

session_t = ctypes.POINTER(session_int)

546

547

class certificate_credentials_st(ctypes.Structure):

548

_fields_ = []

549

certificate_credentials_t = ctypes.POINTER(

550

certificate_credentials_st)

551

certificate_type_t = ctypes.c_int

552

553

class datum_t(ctypes.Structure):

554

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

555

('size', ctypes.c_uint)]

556

557

class openpgp_crt_int(ctypes.Structure):

558

_fields_ = []

559

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

560

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

561

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

562

credentials_type_t = ctypes.c_int

563

transport_ptr_t = ctypes.c_void_p

564

close_request_t = ctypes.c_int

565

566

# Exceptions

567

class Error(Exception):

568

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

569

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

570

# code is passed, convert it to a string with

571

# gnutls.strerror()

572

self.code = code

573

if message is None and code is not None:

574

message = gnutls.strerror(code)

575

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

576

message, *args)

577

578

class CertificateSecurityError(Error):

579

pass

580

581

# Classes

582

class Credentials:

583

def __init__(self):

584

self._c_object = gnutls.certificate_credentials_t()

585

gnutls.certificate_allocate_credentials(

586

ctypes.byref(self._c_object))

587

self.type = gnutls.CRD_CERTIFICATE

588

589

def __del__(self):

590

gnutls.certificate_free_credentials(self._c_object)

591

592

class ClientSession:

593

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

594

self._c_object = gnutls.session_t()

595

gnutls_flags = gnutls.CLIENT

596

if gnutls.check_version(b"3.5.6"):

597

gnutls_flags |= gnutls.NO_TICKETS

598

if gnutls.has_rawpk:

599

gnutls_flags |= gnutls.ENABLE_RAWPK

600

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

601

del gnutls_flags

602

gnutls.set_default_priority(self._c_object)

603

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

604

gnutls.handshake_set_private_extensions(self._c_object,

605

True)

606

self.socket = socket

607

if credentials is None:

608

credentials = gnutls.Credentials()

609

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

610

ctypes.cast(credentials._c_object,

611

ctypes.c_void_p))

612

self.credentials = credentials

613

614

def __del__(self):

615

gnutls.deinit(self._c_object)

616

617

def handshake(self):

618

return gnutls.handshake(self._c_object)

619

620

def send(self, data):

621

data = bytes(data)

622

data_len = len(data)

623

while data_len > 0:

624

data_len -= gnutls.record_send(self._c_object,

625

data[-data_len:],

626

data_len)

627

628

def bye(self):

629

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

630

631

# Error handling functions

632

def _error_code(result):

633

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

634

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

635

if result >= 0:

636

return result

637

if result == gnutls.E_NO_CERTIFICATE_FOUND:

638

raise gnutls.CertificateSecurityError(code=result)

639

raise gnutls.Error(code=result)

640

641

def _retry_on_error(result, func, arguments):

642

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

643

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

644

while result < 0:

645

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

646

return _error_code(result)

647

result = func(*arguments)

648

return result

649

650

# Unless otherwise indicated, the function declarations below are

651

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

652

653

# Functions

654

priority_set_direct = _library.gnutls_priority_set_direct

655

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

656

ctypes.POINTER(ctypes.c_char_p)]

657

priority_set_direct.restype = _error_code

658

659

init = _library.gnutls_init

660

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

661

init.restype = _error_code

662

663

set_default_priority = _library.gnutls_set_default_priority

664

set_default_priority.argtypes = [session_t]

665

set_default_priority.restype = _error_code

666

667

record_send = _library.gnutls_record_send

668

record_send.argtypes = [session_t, ctypes.c_void_p,

669

ctypes.c_size_t]

670

record_send.restype = ctypes.c_ssize_t

671

record_send.errcheck = _retry_on_error

672

673

certificate_allocate_credentials = (

674

_library.gnutls_certificate_allocate_credentials)

675

certificate_allocate_credentials.argtypes = [

676

ctypes.POINTER(certificate_credentials_t)]

677

certificate_allocate_credentials.restype = _error_code

678

679

certificate_free_credentials = (

680

_library.gnutls_certificate_free_credentials)

681

certificate_free_credentials.argtypes = [

682

certificate_credentials_t]

683

certificate_free_credentials.restype = None

684

685

handshake_set_private_extensions = (

686

_library.gnutls_handshake_set_private_extensions)

687

handshake_set_private_extensions.argtypes = [session_t,

688

ctypes.c_int]

689

handshake_set_private_extensions.restype = None

690

691

credentials_set = _library.gnutls_credentials_set

692

credentials_set.argtypes = [session_t, credentials_type_t,

693

ctypes.c_void_p]

694

credentials_set.restype = _error_code

695

696

strerror = _library.gnutls_strerror

697

strerror.argtypes = [ctypes.c_int]

698

strerror.restype = ctypes.c_char_p

699

700

certificate_type_get = _library.gnutls_certificate_type_get

701

certificate_type_get.argtypes = [session_t]

702

certificate_type_get.restype = _error_code

703

704

certificate_get_peers = _library.gnutls_certificate_get_peers

705

certificate_get_peers.argtypes = [session_t,

706

ctypes.POINTER(ctypes.c_uint)]

707

certificate_get_peers.restype = ctypes.POINTER(datum_t)

708

709

global_set_log_level = _library.gnutls_global_set_log_level

710

global_set_log_level.argtypes = [ctypes.c_int]

711

global_set_log_level.restype = None

712

713

global_set_log_function = _library.gnutls_global_set_log_function

714

global_set_log_function.argtypes = [log_func]

715

global_set_log_function.restype = None

716

717

deinit = _library.gnutls_deinit

718

deinit.argtypes = [session_t]

719

deinit.restype = None

720

721

handshake = _library.gnutls_handshake

722

handshake.argtypes = [session_t]

723

handshake.restype = _error_code

724

handshake.errcheck = _retry_on_error

725

726

transport_set_ptr = _library.gnutls_transport_set_ptr

727

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

728

transport_set_ptr.restype = None

729

730

bye = _library.gnutls_bye

731

bye.argtypes = [session_t, close_request_t]

732

bye.restype = _error_code

733

bye.errcheck = _retry_on_error

734

735

check_version = _library.gnutls_check_version

736

check_version.argtypes = [ctypes.c_char_p]

737

check_version.restype = ctypes.c_char_p

738

739

_need_version = b"3.3.0"

740

if check_version(_need_version) is None:

741

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

742

.format(_need_version))

743

744

_tls_rawpk_version = b"3.6.6"

745

has_rawpk = bool(check_version(_tls_rawpk_version))

746

747

if has_rawpk:

748

# Types

749

class pubkey_st(ctypes.Structure):

750

_fields = []

751

pubkey_t = ctypes.POINTER(pubkey_st)

752

753

x509_crt_fmt_t = ctypes.c_int

754

755

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

756

pubkey_init = _library.gnutls_pubkey_init

757

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

758

pubkey_init.restype = _error_code

759

760

pubkey_import = _library.gnutls_pubkey_import

761

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

762

x509_crt_fmt_t]

763

pubkey_import.restype = _error_code

764

765

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

766

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

767

ctypes.POINTER(ctypes.c_ubyte),

768

ctypes.POINTER(ctypes.c_size_t)]

769

pubkey_get_key_id.restype = _error_code

770

771

pubkey_deinit = _library.gnutls_pubkey_deinit

772

pubkey_deinit.argtypes = [pubkey_t]

773

pubkey_deinit.restype = None

774

else:

775

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

776

777

openpgp_crt_init = _library.gnutls_openpgp_crt_init

778

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

779

openpgp_crt_init.restype = _error_code

780

781

openpgp_crt_import = _library.gnutls_openpgp_crt_import

782

openpgp_crt_import.argtypes = [openpgp_crt_t,

783

ctypes.POINTER(datum_t),

784

openpgp_crt_fmt_t]

785

openpgp_crt_import.restype = _error_code

786

787

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

788

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

789

ctypes.POINTER(ctypes.c_uint)]

790

openpgp_crt_verify_self.restype = _error_code

791

792

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

793

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

794

openpgp_crt_deinit.restype = None

795

796

openpgp_crt_get_fingerprint = (

797

_library.gnutls_openpgp_crt_get_fingerprint)

798

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

799

ctypes.c_void_p,

800

ctypes.POINTER(

801

ctypes.c_size_t)]

802

openpgp_crt_get_fingerprint.restype = _error_code

803

804

if check_version(b"3.6.4"):

805

certificate_type_get2 = _library.gnutls_certificate_type_get2

806

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

807

certificate_type_get2.restype = _error_code

808

809

# Remove non-public functions

810

del _error_code, _retry_on_error

811

812

813

def call_pipe(connection, # : multiprocessing.Connection

814

func, *args, **kwargs):

815

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

816

817

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

818

return value on the provided multiprocessing.Connection.

819

"""

820

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

821

connection.close()

822

823

824

class Client:

409

825

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

410

826

411

827

Attributes:

412

828

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

413

829

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

414

830

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

415

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

416

to see if the client lives.

417

'None' if no process is running.

418

checker_callback_tag: a gobject event source tag, or None

831

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

832

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

833

running.

834

checker_callback_tag: a GLib event source tag, or None

419

835

checker_command: string; External command which is run to check

420

836

if client lives. %() expansions are done at

421

837

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

422

838

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

423

checker_initiator_tag: a gobject event source tag, or None

839

checker_initiator_tag: a GLib event source tag, or None

424

840

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

425

841

client_structure: Object describing what attributes a client has

426

842

and is used for storing the client at exit

427

843

current_checker_command: string; current running checker_command

428

disable_initiator_tag: a gobject event source tag, or None

844

disable_initiator_tag: a GLib event source tag, or None

429

845

enabled: bool()

430

846

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

431

uniquely identify the client

847

uniquely identify an OpenPGP client

848

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

849

a client using raw public keys

432

850

host: string; available for use by the checker command

433

851

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

434

852

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

436

854

last_checker_status: integer between 0 and 255 reflecting exit

437

855

status of last checker. -1 reflects crashed

438

856

checker, -2 means no checker completed yet.

857

last_checker_signal: The signal which killed the last checker, if

858

last_checker_status is -1

439

859

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

440

860

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

441

861

D-Bus identifiers

448

868

disabled, or None

449

869

server_settings: The server_settings dict from main()

450

870

"""

451

871

452

872

runtime_expansions = ("approval_delay", "approval_duration",

453

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

873

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

454

874

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

455

875

"last_approval_request", "last_checked_ok",

456

876

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

457

client_defaults = { "timeout": "PT5M",

458

"extended_timeout": "PT15M",

459

"interval": "PT2M",

460

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

461

"host": "",

462

"approval_delay": "PT0S",

463

"approval_duration": "PT1S",

464

"approved_by_default": "True",

465

"enabled": "True",

466

}

467

468

def timeout_milliseconds(self):

469

"Return the 'timeout' attribute in milliseconds"

470

return timedelta_to_milliseconds(self.timeout)

471

472

def extended_timeout_milliseconds(self):

473

"Return the 'extended_timeout' attribute in milliseconds"

474

return timedelta_to_milliseconds(self.extended_timeout)

475

476

def interval_milliseconds(self):

477

"Return the 'interval' attribute in milliseconds"

478

return timedelta_to_milliseconds(self.interval)

479

480

def approval_delay_milliseconds(self):

481

return timedelta_to_milliseconds(self.approval_delay)

482

877

client_defaults = {

878

"timeout": "PT5M",

879

"extended_timeout": "PT15M",

880

"interval": "PT2M",

881

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

882

"host": "",

883

"approval_delay": "PT0S",

884

"approval_duration": "PT1S",

885

"approved_by_default": "True",

886

"enabled": "True",

887

}

888

483

889

@staticmethod

484

890

def config_parser(config):

485

891

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

492

898

for client_name in config.sections():

493

899

section = dict(config.items(client_name))

494

900

client = settings[client_name] = {}

495

901

496

902

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

497

903

# Reformat values from string types to Python types

498

904

client["approved_by_default"] = config.getboolean(

499

905

client_name, "approved_by_default")

500

906

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

501

907

"enabled")

502

908

909

# Uppercase and remove spaces from key_id and fingerprint

910

# for later comparison purposes with return value from the

911

# key_id() and fingerprint() functions

912

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

913

.replace(" ", ""))

503

914

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

504

915

.replace(" ", ""))

505

916

if "secret" in section:

506

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

917

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

918

.encode("utf-8"),

919

"base64")

507

920

elif "secfile" in section:

508

921

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

509

922

(section["secfile"])),

510

923

"rb") as secfile:

511

924

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

512

925

else:

513

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

926

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

514

927

.format(section))

515

928

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

516

929

client["extended_timeout"] = string_to_delta(

524

937

client["last_approval_request"] = None

525

938

client["last_checked_ok"] = None

526

939

client["last_checker_status"] = -2

527

940

528

941

return settings

529

530

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

942

943

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

531

944

self.name = name

532

945

if server_settings is None:

533

946

server_settings = {}

534

947

self.server_settings = server_settings

535

948

# adding all client settings

536

for setting, value in settings.iteritems():

949

for setting, value in settings.items():

537

950

setattr(self, setting, value)

538

951

539

952

if self.enabled:

540

953

if not hasattr(self, "last_enabled"):

541

954

self.last_enabled = datetime.datetime.utcnow()

545

958

else:

546

959

self.last_enabled = None

547

960

self.expires = None

548

961

549

962

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

550

# Uppercase and remove spaces from fingerprint for later

551

# comparison purposes with return value from the fingerprint()

552

# function

963

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

553

964

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

554

965

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

555

966

datetime.datetime.utcnow())

556

967

557

968

# attributes specific for this server instance

558

969

self.checker = None

559

970

self.checker_initiator_tag = None

562

973

self.current_checker_command = None

563

974

self.approved = None

564

975

self.approvals_pending = 0

565

self.changedstate = (multiprocessing_manager

566

.Condition(multiprocessing_manager

567

.Lock()))

568

self.client_structure = [attr for attr in

569

self.__dict__.iterkeys()

976

self.changedstate = multiprocessing_manager.Condition(

977

multiprocessing_manager.Lock())

978

self.client_structure = [attr

979

for attr in self.__dict__.keys()

570

980

if not attr.startswith("_")]

571

981

self.client_structure.append("client_structure")

572

573

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

574

lambda obj:

575

isinstance(obj,

576

property)):

982

983

for name, t in inspect.getmembers(

984

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

577

985

if not name.startswith("_"):

578

986

self.client_structure.append(name)

579

987

580

988

# Send notice to process children that client state has changed

581

989

def send_changedstate(self):

582

990

with self.changedstate:

583

991

self.changedstate.notify_all()

584

992

585

993

def enable(self):

586

994

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

587

995

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

592

1000

self.last_enabled = datetime.datetime.utcnow()

593

1001

self.init_checker()

594

1002

self.send_changedstate()

595

1003

596

1004

def disable(self, quiet=True):

597

1005

"""Disable this client."""

598

1006

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

600

1008

if not quiet:

601

1009

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

602

1010

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

603

gobject.source_remove(self.disable_initiator_tag)

1011

GLib.source_remove(self.disable_initiator_tag)

604

1012

self.disable_initiator_tag = None

605

1013

self.expires = None

606

1014

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

607

gobject.source_remove(self.checker_initiator_tag)

1015

GLib.source_remove(self.checker_initiator_tag)

608

1016

self.checker_initiator_tag = None

609

1017

self.stop_checker()

610

1018

self.enabled = False

611

1019

if not quiet:

612

1020

self.send_changedstate()

613

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

1021

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

614

1022

return False

615

1023

616

1024

def __del__(self):

617

1025

self.disable()

618

1026

619

1027

def init_checker(self):

620

1028

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

621

1029

# and every interval from then on.

622

1030

if self.checker_initiator_tag is not None:

623

gobject.source_remove(self.checker_initiator_tag)

624

self.checker_initiator_tag = (gobject.timeout_add

625

(self.interval_milliseconds(),

626

self.start_checker))

1031

GLib.source_remove(self.checker_initiator_tag)

1032

self.checker_initiator_tag = GLib.timeout_add(

1033

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

1034

self.start_checker)

627

1035

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

628

1036

if self.disable_initiator_tag is not None:

629

gobject.source_remove(self.disable_initiator_tag)

630

self.disable_initiator_tag = (gobject.timeout_add

631

(self.timeout_milliseconds(),

632

self.disable))

1037

GLib.source_remove(self.disable_initiator_tag)

1038

self.disable_initiator_tag = GLib.timeout_add(

1039

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

633

1040

# Also start a new checker *right now*.

634

1041

self.start_checker()

635

636

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

1042

1043

def checker_callback(self, source, condition, connection,

1044

command):

637

1045

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

1046

# Read return code from connection (see call_pipe)

1047

returncode = connection.recv()

1048

connection.close()

1049

self.checker.join()

638

1050

self.checker_callback_tag = None

639

1051

self.checker = None

640

if os.WIFEXITED(condition):

641

self.last_checker_status = os.WEXITSTATUS(condition)

1052

1053

if returncode >= 0:

1054

self.last_checker_status = returncode

1055

self.last_checker_signal = None

642

1056

if self.last_checker_status == 0:

643

1057

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

644

1058

vars(self))

645

1059

self.checked_ok()

646

1060

else:

647

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

648

vars(self))

1061

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

649

1062

else:

650

1063

self.last_checker_status = -1

1064

self.last_checker_signal = -returncode

651

1065

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

652

1066

vars(self))

653

1067

return False

1068

654

1069

def checked_ok(self):

655

1070

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

656

1071

self.last_checked_ok = datetime.datetime.utcnow()

657

1072

self.last_checker_status = 0

1073

self.last_checker_signal = None

658

1074

self.bump_timeout()

659

1075

660

1076

def bump_timeout(self, timeout=None):

661

1077

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

662

1078

if timeout is None:

663

1079

timeout = self.timeout

664

1080

if self.disable_initiator_tag is not None:

665

gobject.source_remove(self.disable_initiator_tag)

1081

GLib.source_remove(self.disable_initiator_tag)

666

1082

self.disable_initiator_tag = None

667

1083

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

668

self.disable_initiator_tag = (gobject.timeout_add

669

(timedelta_to_milliseconds

670

(timeout), self.disable))

1084

self.disable_initiator_tag = GLib.timeout_add(

1085

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

671

1086

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

672

1087

673

1088

def need_approval(self):

674

1089

self.last_approval_request = datetime.datetime.utcnow()

675

1090

676

1091

def start_checker(self):

677

1092

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

678

1093

679

1094

If a checker already exists, leave it running and do

680

1095

nothing."""

681

1096

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

686

1101

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

687

1102

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

688

1103

# should be.

689

690

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

691

try:

692

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

693

except AttributeError:

694

pass

695

except OSError as error:

696

if error.errno != errno.ECHILD:

697

raise

698

else:

699

if pid:

700

logger.warning("Checker was a zombie")

701

gobject.source_remove(self.checker_callback_tag)

702

self.checker_callback(pid, status,

703

self.current_checker_command)

1104

1105

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

1106

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

1107

self.checker.join()

1108

self.checker = None

704

1109

# Start a new checker if needed

705

1110

if self.checker is None:

706

1111

# Escape attributes for the shell

707

escaped_attrs = dict(

708

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

709

for attr in

710

self.runtime_expansions)

1112

escaped_attrs = {

1113

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

1114

for attr in self.runtime_expansions}

711

1115

try:

712

1116

command = self.checker_command % escaped_attrs

713

1117

except TypeError as error:

714

1118

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

715

self.checker_command, exc_info=error)

716

return True # Try again later

1119

self.checker_command,

1120

exc_info=error)

1121

return True # Try again later

717

1122

self.current_checker_command = command

718

try:

719

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

720

command, self.name)

721

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

722

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

723

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

724

# always replaced by /dev/null.)

725

# The exception is when not debugging but nevertheless

726

# running in the foreground; use the previously

727

# created wnull.

728

popen_args = {}

729

if (not self.server_settings["debug"]

730

and self.server_settings["foreground"]):

731

popen_args.update({"stdout": wnull,

732

"stderr": wnull })

733

self.checker = subprocess.Popen(command,

734

close_fds=True,

735

shell=True, cwd="/",

736

**popen_args)

737

except OSError as error:

738

logger.error("Failed to start subprocess",

739

exc_info=error)

740

return True

741

self.checker_callback_tag = (gobject.child_watch_add

742

(self.checker.pid,

743

self.checker_callback,

744

data=command))

745

# The checker may have completed before the gobject

746

# watch was added. Check for this.

747

try:

748

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

749

except OSError as error:

750

if error.errno == errno.ECHILD:

751

# This should never happen

752

logger.error("Child process vanished",

753

exc_info=error)

754

return True

755

raise

756

if pid:

757

gobject.source_remove(self.checker_callback_tag)

758

self.checker_callback(pid, status, command)

759

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

1123

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

1124

self.name)

1125

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

1126

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

1127

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

1128

# always replaced by /dev/null.)

1129

# The exception is when not debugging but nevertheless

1130

# running in the foreground; use the previously

1131

# created wnull.

1132

popen_args = {"close_fds": True,

1133

"shell": True,

1134

"cwd": "/"}

1135

if (not self.server_settings["debug"]

1136

and self.server_settings["foreground"]):

1137

popen_args.update({"stdout": wnull,

1138

"stderr": wnull})

1139

pipe = multiprocessing.Pipe(duplex=False)

1140

self.checker = multiprocessing.Process(

1141

target=call_pipe,

1142

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

1143

kwargs=popen_args)

1144

self.checker.start()

1145

self.checker_callback_tag = GLib.io_add_watch(

1146

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

1147

self.checker_callback, pipe[0], command)

1148

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

760

1149

return True

761

1150

762

1151

def stop_checker(self):

763

1152

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

764

1153

if self.checker_callback_tag:

765

gobject.source_remove(self.checker_callback_tag)

1154

GLib.source_remove(self.checker_callback_tag)

766

1155

self.checker_callback_tag = None

767

1156

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

768

1157

return

769

1158

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

770

try:

771

self.checker.terminate()

772

#time.sleep(0.5)

773

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

774

# self.checker.kill()

775

except OSError as error:

776

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

777

raise

1159

self.checker.terminate()

778

1160

self.checker = None

779

1161

780

1162

781

def dbus_service_property(dbus_interface, signature="v",

782

access="readwrite", byte_arrays=False):

1163

def dbus_service_property(dbus_interface,

1164

signature="v",

1165

access="readwrite",

1166

byte_arrays=False):

783

1167

"""Decorators for marking methods of a DBusObjectWithProperties to

784

1168

become properties on the D-Bus.

785

1169

786

1170

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

787

1171

and with one argument by "Set".

788

1172

789

1173

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

790

1174

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

791

1175

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

794

1178

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

795

1179

if byte_arrays and signature != "ay":

796

1180

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

797

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

1181

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

1182

798

1183

def decorator(func):

799

1184

func._dbus_is_property = True

800

1185

func._dbus_interface = dbus_interface

803

1188

func._dbus_name = func.__name__

804

1189

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

805

1190

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

806

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1191

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

807

1192

return func

1193

808

1194

return decorator

809

1195

810

1196

811

1197

def dbus_interface_annotations(dbus_interface):

812

1198

"""Decorator for marking functions returning interface annotations

813

1199

814

1200

Usage:

815

1201

816

1202

@dbus_interface_annotations("org.example.Interface")

817

1203

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

818

1204

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

819

1205

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

820

1206

"false"}

821

1207

"""

1208

822

1209

def decorator(func):

823

1210

func._dbus_is_interface = True

824

1211

func._dbus_interface = dbus_interface

825

1212

func._dbus_name = dbus_interface

826

1213

return func

1214

827

1215

return decorator

828

1216

829

1217

830

1218

def dbus_annotations(annotations):

831

1219

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

832

1220

Usage:

833

1221

1222

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

1223

"org.freedesktop.DBus.Property."

1224

"EmitsChangedSignal": "false"})

834

1225

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

835

1226

access="r")

836

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

837

"org.freedesktop.DBus.Property."

838

"EmitsChangedSignal": "false"})

839

1227

def Property_dbus_property(self):

840

1228

return dbus.Boolean(False)

1229

1230

See also the DBusObjectWithAnnotations class.

841

1231

"""

1232

842

1233

def decorator(func):

843

1234

func._dbus_annotations = annotations

844

1235

return func

1236

845

1237

return decorator

846

1238

847

1239

848

1240

class DBusPropertyException(dbus.exceptions.DBusException):

849

1241

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

850

1242

"""

851

def __unicode__(self):

852

return unicode(str(self))

1243

pass

853

1244

854

1245

855

1246

class DBusPropertyAccessException(DBusPropertyException):

864

1255

pass

865

1256

866

1257

867

class DBusObjectWithProperties(dbus.service.Object):

868

"""A D-Bus object with properties.

869

870

Classes inheriting from this can use the dbus_service_property

871

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

872

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

1258

class DBusObjectWithAnnotations(dbus.service.Object):

1259

"""A D-Bus object with annotations.

1260

1261

Classes inheriting from this can use the dbus_annotations

1262

decorator to add annotations to methods or signals.

873

1263

"""

874

1264

875

1265

@staticmethod

876

1266

def _is_dbus_thing(thing):

877

1267

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

878

1268

879

1269

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

880

1270

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

881

1271

"""

882

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

1272

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

883

1273

False)

884

1274

885

1275

def _get_all_dbus_things(self, thing):

886

1276

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

887

1277

"""

888

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

889

name),

1278

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

890

1279

athing.__get__(self))

891

1280

for cls in self.__class__.__mro__

892

1281

for name, athing in

893

inspect.getmembers(cls,

894

self._is_dbus_thing(thing)))

895

1282

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

1283

1284

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1285

out_signature="s",

1286

path_keyword='object_path',

1287

connection_keyword='connection')

1288

def Introspect(self, object_path, connection):

1289

"""Overloading of standard D-Bus method.

1290

1291

Inserts annotation tags on methods and signals.

1292

"""

1293

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

1294

connection)

1295

try:

1296

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

1297

1298

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

1299

# Add annotation tags

1300

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

1301

for tag in if_tag.getElementsByTagName(typ):

1302

annots = dict()

1303

for name, prop in (self.

1304

_get_all_dbus_things(typ)):

1305

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

1306

and prop._dbus_interface

1307

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

1308

annots.update(getattr(

1309

prop, "_dbus_annotations", {}))

1310

for name, value in annots.items():

1311

ann_tag = document.createElement(

1312

"annotation")

1313

ann_tag.setAttribute("name", name)

1314

ann_tag.setAttribute("value", value)

1315

tag.appendChild(ann_tag)

1316

# Add interface annotation tags

1317

for annotation, value in dict(

1318

itertools.chain.from_iterable(

1319

annotations().items()

1320

for name, annotations

1321

in self._get_all_dbus_things("interface")

1322

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

1323

)).items():

1324

ann_tag = document.createElement("annotation")

1325

ann_tag.setAttribute("name", annotation)

1326

ann_tag.setAttribute("value", value)

1327

if_tag.appendChild(ann_tag)

1328

# Fix argument name for the Introspect method itself

1329

if (if_tag.getAttribute("name")

1330

== dbus.INTROSPECTABLE_IFACE):

1331

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

1332

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

1333

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

1334

if (arg.getAttribute("direction")

1335

== "out"):

1336

arg.setAttribute("name",

1337

"xml_data")

1338

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

1339

document.unlink()

1340

except (AttributeError, xml.dom.DOMException,

1341

xml.parsers.expat.ExpatError) as error:

1342

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

1343

exc_info=error)

1344

return xmlstring

1345

1346

1347

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1348

"""A D-Bus object with properties.

1349

1350

Classes inheriting from this can use the dbus_service_property

1351

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

1352

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

1353

"""

1354

896

1355

def _get_dbus_property(self, interface_name, property_name):

897

1356

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

898

1357

property with the specified name and interface.

899

1358

"""

900

for cls in self.__class__.__mro__:

901

for name, value in (inspect.getmembers

902

(cls,

903

self._is_dbus_thing("property"))):

1359

for cls in self.__class__.__mro__:

1360

for name, value in inspect.getmembers(

1361

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

904

1362

if (value._dbus_name == property_name

905

1363

and value._dbus_interface == interface_name):

906

1364

return value.__get__(self)

907

1365

908

1366

# No such property

909

raise DBusPropertyNotFound(self.dbus_object_path + ":"

910

+ interface_name + "."

911

+ property_name)

912

913

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

1367

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

1368

self.dbus_object_path, interface_name, property_name))

1369

1370

@classmethod

1371

def _get_all_interface_names(cls):

1372

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

1373

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

1374

"_dbus_interface", None)

1375

for x in (inspect.getmro(cls))

1376

for attr in dir(x))

1377

if name is not None)

1378

1379

@dbus.service.method(dbus.PROPERTIES_IFACE,

1380

in_signature="ss",

914

1381

out_signature="v")

915

1382

def Get(self, interface_name, property_name):

916

1383

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

922

1389

if not hasattr(value, "variant_level"):

923

1390

return value

924

1391

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

925

1392

926

1393

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

927

1394

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

928

1395

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

934

1401

# The byte_arrays option is not supported yet on

935

1402

# signatures other than "ay".

936

1403

if prop._dbus_signature != "ay":

937

raise ValueError

1404

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

1405

"'ay' signature {!r}"

1406

.format(prop._dbus_signature))

938

1407

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

939

1408

for byte in value))

940

1409

prop(value)

941

942

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

1410

1411

@dbus.service.method(dbus.PROPERTIES_IFACE,

1412

in_signature="s",

943

1413

out_signature="a{sv}")

944

1414

def GetAll(self, interface_name):

945

1415

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

946

1416

standard.

947

1417

948

1418

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

949

1419

"""

950

1420

properties = {}

960

1430

if not hasattr(value, "variant_level"):

961

1431

properties[name] = value

962

1432

continue

963

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

964

value.variant_level+1)

1433

properties[name] = type(value)(

1434

value, variant_level=value.variant_level + 1)

965

1435

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

966

1436

1437

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

1438

def PropertiesChanged(self, interface_name, changed_properties,

1439

invalidated_properties):

1440

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

1441

standard.

1442

"""

1443

pass

1444

967

1445

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

968

1446

out_signature="s",

969

1447

path_keyword='object_path',

970

1448

connection_keyword='connection')

971

1449

def Introspect(self, object_path, connection):

972

1450

"""Overloading of standard D-Bus method.

973

1451

974

1452

Inserts property tags and interface annotation tags.

975

1453

"""

976

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

977

connection)

1454

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1455

object_path,

1456

connection)

978

1457

try:

979

1458

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

1459

980

1460

def make_tag(document, name, prop):

981

1461

e = document.createElement("property")

982

1462

e.setAttribute("name", name)

983

1463

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

984

1464

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

985

1465

return e

1466

986

1467

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

987

1468

# Add property tags

988

1469

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

991

1472

if prop._dbus_interface

992

1473

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

993

1474

if_tag.appendChild(tag)

994

# Add annotation tags

995

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

996

for tag in if_tag.getElementsByTagName(typ):

997

annots = dict()

998

for name, prop in (self.

999

_get_all_dbus_things(typ)):

1000

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

1001

and prop._dbus_interface

1002

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

1003

annots.update(getattr

1004

(prop,

1005

"_dbus_annotations",

1006

{}))

1007

for name, value in annots.iteritems():

1008

ann_tag = document.createElement(

1009

"annotation")

1010

ann_tag.setAttribute("name", name)

1011

ann_tag.setAttribute("value", value)

1012

tag.appendChild(ann_tag)

1013

# Add interface annotation tags

1014

for annotation, value in dict(

1015

itertools.chain.from_iterable(

1016

annotations().iteritems()

1017

for name, annotations in

1018

self._get_all_dbus_things("interface")

1019

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

1020

)).iteritems():

1021

ann_tag = document.createElement("annotation")

1022

ann_tag.setAttribute("name", annotation)

1023

ann_tag.setAttribute("value", value)

1024

if_tag.appendChild(ann_tag)

1475

# Add annotation tags for properties

1476

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

1477

annots = dict()

1478

for name, prop in self._get_all_dbus_things(

1479

"property"):

1480

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

1481

and prop._dbus_interface

1482

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

1483

annots.update(getattr(

1484

prop, "_dbus_annotations", {}))

1485

for name, value in annots.items():

1486

ann_tag = document.createElement(

1487

"annotation")

1488

ann_tag.setAttribute("name", name)

1489

ann_tag.setAttribute("value", value)

1490

tag.appendChild(ann_tag)

1025

1491

# Add the names to the return values for the

1026

1492

# "org.freedesktop.DBus.Properties" methods

1027

1493

if (if_tag.getAttribute("name")

1046

1512

return xmlstring

1047

1513

1048

1514

1515

try:

1516

dbus.OBJECT_MANAGER_IFACE

1517

except AttributeError:

1518

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

1519

1520

1521

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1522

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

1523

1524

Classes inheriting from this exposes the standard

1525

GetManagedObjects call and the InterfacesAdded and

1526

InterfacesRemoved signals on the standard

1527

"org.freedesktop.DBus.ObjectManager" interface.

1528

1529

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

1530

manually.

1531

"""

1532

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1533

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

1534

def GetManagedObjects(self):

1535

"""This function must be overridden"""

1536

raise NotImplementedError()

1537

1538

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1539

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

1540

def InterfacesAdded(self, object_path, interfaces_and_properties):

1541

pass

1542

1543

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

1544

def InterfacesRemoved(self, object_path, interfaces):

1545

pass

1546

1547

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1548

out_signature="s",

1549

path_keyword='object_path',

1550

connection_keyword='connection')

1551

def Introspect(self, object_path, connection):

1552

"""Overloading of standard D-Bus method.

1553

1554

Override return argument name of GetManagedObjects to be

1555

"objpath_interfaces_and_properties"

1556

"""

1557

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1558

object_path,

1559

connection)

1560

try:

1561

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

1562

1563

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

1564

# Fix argument name for the GetManagedObjects method

1565

if (if_tag.getAttribute("name")

1566

== dbus.OBJECT_MANAGER_IFACE):

1567

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

1568

if (cn.getAttribute("name")

1569

== "GetManagedObjects"):

1570

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

1571

if (arg.getAttribute("direction")

1572

== "out"):

1573

arg.setAttribute(

1574

"name",

1575

"objpath_interfaces"

1576

"_and_properties")

1577

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

1578

document.unlink()

1579

except (AttributeError, xml.dom.DOMException,

1580

xml.parsers.expat.ExpatError) as error:

1581

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

1582

exc_info=error)

1583

return xmlstring

1584

1585

1049

1586

def datetime_to_dbus(dt, variant_level=0):

1050

1587

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

1051

1588

if dt is None:

1052

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

1053

return dbus.String(dt.isoformat(),

1054

variant_level=variant_level)

1589

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

1590

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

1055

1591

1056

1592

1057

1593

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1059

1595

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

1060

1596

interface names according to the "alt_interface_names" mapping.

1061

1597

Usage:

1062

1598

1063

1599

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

1064

1600

"net.example.AlternateInterface"})

1065

1601

class SampleDBusObject(dbus.service.Object):

1066

1602

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

1067

1603

def SampleDBusMethod():

1068

1604

pass

1069

1605

1070

1606

The above "SampleDBusMethod" on "SampleDBusObject" will be

1071

1607

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

1072

1608

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

1073

1609

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

1074

1610

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

1075

1611

1076

1612

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

1077

1613

(from DBusObjectWithProperties) and interfaces (from the

1078

1614

dbus_interface_annotations decorator).

1079

1615

"""

1616

1080

1617

def wrapper(cls):

1081

1618

for orig_interface_name, alt_interface_name in (

1082

alt_interface_names.iteritems()):

1619

alt_interface_names.items()):

1083

1620

attr = {}

1084

1621

interface_names = set()

1085

1622

# Go though all attributes of the class

1087

1624

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

1088

1625

# with the wrong interface name

1089

1626

if (not hasattr(attribute, "_dbus_interface")

1090

or not attribute._dbus_interface

1091

.startswith(orig_interface_name)):

1627

or not attribute._dbus_interface.startswith(

1628

orig_interface_name)):

1092

1629

continue

1093

1630

# Create an alternate D-Bus interface name based on

1094

1631

# the current name

1095

alt_interface = (attribute._dbus_interface

1096

.replace(orig_interface_name,

1097

alt_interface_name))

1632

alt_interface = attribute._dbus_interface.replace(

1633

orig_interface_name, alt_interface_name)

1098

1634

interface_names.add(alt_interface)

1099

1635

# Is this a D-Bus signal?

1100

1636

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

1101

1637

# Extract the original non-method undecorated

1102

1638

# function by black magic

1103

nonmethod_func = (dict(

1639

if sys.version_info.major == 2:

1640

nonmethod_func = (dict(

1104

1641

zip(attribute.func_code.co_freevars,

1105

attribute.__closure__))["func"]

1106

.cell_contents)

1642

attribute.__closure__))

1643

["func"].cell_contents)

1644

else:

1645

nonmethod_func = (dict(

1646

zip(attribute.__code__.co_freevars,

1647

attribute.__closure__))

1648

["func"].cell_contents)

1107

1649

# Create a new, but exactly alike, function

1108

1650

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

1109

1651

# with the alternate D-Bus interface name

1110

new_function = (dbus.service.signal

1111

(alt_interface,

1112

attribute._dbus_signature)

1113

(types.FunctionType(

1114

nonmethod_func.func_code,

1115

nonmethod_func.func_globals,

1116

nonmethod_func.func_name,

1117

nonmethod_func.func_defaults,

1118

nonmethod_func.func_closure)))

1652

new_function = copy_function(nonmethod_func)

1653

new_function = (dbus.service.signal(

1654

alt_interface,

1655

attribute._dbus_signature)(new_function))

1119

1656

# Copy annotations, if any

1120

1657

try:

1121

new_function._dbus_annotations = (

1122

dict(attribute._dbus_annotations))

1658

new_function._dbus_annotations = dict(

1659

attribute._dbus_annotations)

1123

1660

except AttributeError:

1124

1661

pass

1662

1125

1663

# Define a creator of a function to call both the

1126

1664

# original and alternate functions, so both the

1127

1665

# original and alternate signals gets sent when

1130

1668

"""This function is a scope container to pass

1131

1669

func1 and func2 to the "call_both" function

1132

1670

outside of its arguments"""

1671

1672

@functools.wraps(func2)

1133

1673

def call_both(*args, **kwargs):

1134

1674

"""This function will emit two D-Bus

1135

1675

signals by calling func1 and func2"""

1136

1676

func1(*args, **kwargs)

1137

1677

func2(*args, **kwargs)

1678

# Make wrapper function look like a D-Bus

1679

# signal

1680

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

1681

if name.startswith("_dbus_"):

1682

setattr(call_both, name, attr)

1683

1138

1684

return call_both

1139

1685

# Create the "call_both" function and add it to

1140

1686

# the class

1145

1691

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

1146

1692

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

1147

1693

# to the class.

1148

attr[attrname] = (dbus.service.method

1149

(alt_interface,

1150

attribute._dbus_in_signature,

1151

attribute._dbus_out_signature)

1152

(types.FunctionType

1153

(attribute.func_code,

1154

attribute.func_globals,

1155

attribute.func_name,

1156

attribute.func_defaults,

1157

attribute.func_closure)))

1694

attr[attrname] = (

1695

dbus.service.method(

1696

alt_interface,

1697

attribute._dbus_in_signature,

1698

attribute._dbus_out_signature)

1699

(copy_function(attribute)))

1158

1700

# Copy annotations, if any

1159

1701

try:

1160

attr[attrname]._dbus_annotations = (

1161

dict(attribute._dbus_annotations))

1702

attr[attrname]._dbus_annotations = dict(

1703

attribute._dbus_annotations)

1162

1704

except AttributeError:

1163

1705

pass

1164

1706

# Is this a D-Bus property?

1167

1709

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

1168

1710

# property with the alternate D-Bus interface

1169

1711

# name. Add it to the class.

1170

attr[attrname] = (dbus_service_property

1171

(alt_interface,

1172

attribute._dbus_signature,

1173

attribute._dbus_access,

1174

attribute

1175

._dbus_get_args_options

1176

["byte_arrays"])

1177

(types.FunctionType

1178

(attribute.func_code,

1179

attribute.func_globals,

1180

attribute.func_name,

1181

attribute.func_defaults,

1182

attribute.func_closure)))

1712

attr[attrname] = (dbus_service_property(

1713

alt_interface, attribute._dbus_signature,

1714

attribute._dbus_access,

1715

attribute._dbus_get_args_options

1716

["byte_arrays"])

1717

(copy_function(attribute)))

1183

1718

# Copy annotations, if any

1184

1719

try:

1185

attr[attrname]._dbus_annotations = (

1186

dict(attribute._dbus_annotations))

1720

attr[attrname]._dbus_annotations = dict(

1721

attribute._dbus_annotations)

1187

1722

except AttributeError:

1188

1723

pass

1189

1724

# Is this a D-Bus interface?

1192

1727

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

1193

1728

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

1194

1729

# to the class.

1195

attr[attrname] = (dbus_interface_annotations

1196

(alt_interface)

1197

(types.FunctionType

1198

(attribute.func_code,

1199

attribute.func_globals,

1200

attribute.func_name,

1201

attribute.func_defaults,

1202

attribute.func_closure)))

1730

attr[attrname] = (

1731

dbus_interface_annotations(alt_interface)

1732

(copy_function(attribute)))

1203

1733

if deprecate:

1204

1734

# Deprecate all alternate interfaces

1205

iname="_AlternateDBusNames_interface_annotation{0}"

1735

iname = "_AlternateDBusNames_interface_annotation{}"

1206

1736

for interface_name in interface_names:

1737

1207

1738

@dbus_interface_annotations(interface_name)

1208

1739

def func(self):

1209

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

1210

"true" }

1740

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

1741

"true"}

1211

1742

# Find an unused name

1212

1743

for aname in (iname.format(i)

1213

1744

for i in itertools.count()):

1217

1748

if interface_names:

1218

1749

# Replace the class with a new subclass of it with

1219

1750

# methods, signals, etc. as created above.

1220

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

1221

(cls,), attr)

1751

if sys.version_info.major == 2:

1752

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

1753

(cls, ), attr)

1754

else:

1755

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

1756

(cls, ), attr)

1222

1757

return cls

1758

1223

1759

return wrapper

1224

1760

1225

1761

1226

1762

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

1227

"se.bsnet.fukt.Mandos"})

1763

"se.bsnet.fukt.Mandos"})

1228

1764

class ClientDBus(Client, DBusObjectWithProperties):

1229

1765

"""A Client class using D-Bus

1230

1766

1231

1767

Attributes:

1232

1768

dbus_object_path: dbus.ObjectPath

1233

1769

bus: dbus.SystemBus()

1234

1770

"""

1235

1771

1236

1772

runtime_expansions = (Client.runtime_expansions

1237

+ ("dbus_object_path",))

1238

1773

+ ("dbus_object_path", ))

1774

1775

_interface = "se.recompile.Mandos.Client"

1776

1239

1777

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

1240

1241

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

1778

1779

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

1242

1780

self.bus = bus

1243

1781

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

1244

1782

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

1245

1783

# the D-Bus

1246

client_object_name = unicode(self.name).translate(

1784

client_object_name = str(self.name).translate(

1247

1785

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

1248

1786

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

1249

self.dbus_object_path = (dbus.ObjectPath

1250

("/clients/" + client_object_name))

1787

self.dbus_object_path = dbus.ObjectPath(

1788

"/clients/" + client_object_name)

1251

1789

DBusObjectWithProperties.__init__(self, self.bus,

1252

1790

self.dbus_object_path)

1253

1254

def notifychangeproperty(transform_func,

1255

dbus_name, type_func=lambda x: x,

1256

variant_level=1):

1791

1792

def notifychangeproperty(transform_func, dbus_name,

1793

type_func=lambda x: x,

1794

variant_level=1,

1795

invalidate_only=False,

1796

_interface=_interface):

1257

1797

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

1258

1798

its changes to DBus.

1259

1799

1260

1800

transform_fun: Function that takes a value and a variant_level

1261

1801

and transforms it to a D-Bus type.

1262

1802

dbus_name: D-Bus name of the variable

1264

1804

to the D-Bus. Default: no transform

1265

1805

variant_level: D-Bus variant level. Default: 1

1266

1806

"""

1267

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

1807

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

1808

1268

1809

def setter(self, value):

1269

1810

if hasattr(self, "dbus_object_path"):

1270

1811

if (not hasattr(self, attrname) or

1271

1812

type_func(getattr(self, attrname, None))

1272

1813

!= type_func(value)):

1273

dbus_value = transform_func(type_func(value),

1274

variant_level

1275

=variant_level)

1276

self.PropertyChanged(dbus.String(dbus_name),

1277

dbus_value)

1814

if invalidate_only:

1815

self.PropertiesChanged(

1816

_interface, dbus.Dictionary(),

1817

dbus.Array((dbus_name, )))

1818

else:

1819

dbus_value = transform_func(

1820

type_func(value),

1821

variant_level=variant_level)

1822

self.PropertyChanged(dbus.String(dbus_name),

1823

dbus_value)

1824

self.PropertiesChanged(

1825

_interface,

1826

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

1827

dbus_value}),

1828

dbus.Array())

1278

1829

setattr(self, attrname, value)

1279

1830

1280

1831

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

1281

1832

1282

1833

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1283

1834

approvals_pending = notifychangeproperty(dbus.Boolean,

1284

1835

"ApprovalPending",

1285

type_func = bool)

1836

type_func=bool)

1286

1837

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

1287

1838

last_enabled = notifychangeproperty(datetime_to_dbus,

1288

1839

"LastEnabled")

1289

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

1290

type_func = lambda checker:

1291

checker is not None)

1840

checker = notifychangeproperty(

1841

dbus.Boolean, "CheckerRunning",

1842

type_func=lambda checker: checker is not None)

1292

1843

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1293

1844

"LastCheckedOK")

1294

1845

last_checker_status = notifychangeproperty(dbus.Int16,

1297

1848

datetime_to_dbus, "LastApprovalRequest")

1298

1849

approved_by_default = notifychangeproperty(dbus.Boolean,

1299

1850

"ApprovedByDefault")

1300

approval_delay = notifychangeproperty(dbus.UInt64,

1301

"ApprovalDelay",

1302

type_func =

1303

timedelta_to_milliseconds)

1851

approval_delay = notifychangeproperty(

1852

dbus.UInt64, "ApprovalDelay",

1853

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

1304

1854

approval_duration = notifychangeproperty(

1305

1855

dbus.UInt64, "ApprovalDuration",

1306

type_func = timedelta_to_milliseconds)

1856

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

1307

1857

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

1308

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

1309

type_func =

1310

timedelta_to_milliseconds)

1858

timeout = notifychangeproperty(

1859

dbus.UInt64, "Timeout",

1860

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

1311

1861

extended_timeout = notifychangeproperty(

1312

1862

dbus.UInt64, "ExtendedTimeout",

1313

type_func = timedelta_to_milliseconds)

1314

interval = notifychangeproperty(dbus.UInt64,

1315

"Interval",

1316

type_func =

1317

timedelta_to_milliseconds)

1863

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

1864

interval = notifychangeproperty(

1865

dbus.UInt64, "Interval",

1866

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

1318

1867

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

1319

1868

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

1869

invalidate_only=True)

1870

1320

1871

del notifychangeproperty

1321

1872

1322

1873

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

1323

1874

try:

1324

1875

self.remove_from_connection()

1327

1878

if hasattr(DBusObjectWithProperties, "__del__"):

1328

1879

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

1329

1880

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

1330

1331

def checker_callback(self, pid, condition, command,

1332

*args, **kwargs):

1333

self.checker_callback_tag = None

1334

self.checker = None

1335

if os.WIFEXITED(condition):

1336

exitstatus = os.WEXITSTATUS(condition)

1881

1882

def checker_callback(self, source, condition,

1883

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

1884

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

1885

connection, command, *args,

1886

**kwargs)

1887

exitstatus = self.last_checker_status

1888

if exitstatus >= 0:

1337

1889

# Emit D-Bus signal

1338

1890

self.CheckerCompleted(dbus.Int16(exitstatus),

1339

dbus.Int64(condition),

1891

# This is specific to GNU libC

1892

dbus.Int64(exitstatus << 8),

1340

1893

dbus.String(command))

1341

1894

else:

1342

1895

# Emit D-Bus signal

1343

1896

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

1344

dbus.Int64(condition),

1897

dbus.Int64(

1898

# This is specific to GNU libC

1899

(exitstatus << 8)

1900

| self.last_checker_signal),

1345

1901

dbus.String(command))

1346

1347

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

1348

*args, **kwargs)

1349

1902

return ret

1903

1350

1904

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

1351

old_checker = self.checker

1352

if self.checker is not None:

1353

old_checker_pid = self.checker.pid

1354

else:

1355

old_checker_pid = None

1905

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

1356

1906

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

1357

1907

# Only if new checker process was started

1358

1908

if (self.checker is not None

1360

1910

# Emit D-Bus signal

1361

1911

self.CheckerStarted(self.current_checker_command)

1362

1912

return r

1363

1913

1364

1914

def _reset_approved(self):

1365

1915

self.approved = None

1366

1916

return False

1367

1917

1368

1918

def approve(self, value=True):

1369

1919

self.approved = value

1370

gobject.timeout_add(timedelta_to_milliseconds

1371

(self.approval_duration),

1372

self._reset_approved)

1920

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

1921

* 1000), self._reset_approved)

1373

1922

self.send_changedstate()

1374

1375

## D-Bus methods, signals & properties

1376

_interface = "se.recompile.Mandos.Client"

1377

1378

## Interfaces

1379

1380

@dbus_interface_annotations(_interface)

1381

def _foo(self):

1382

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

1383

"false"}

1384

1385

## Signals

1386

1923

1924

# D-Bus methods, signals & properties

1925

1926

# Interfaces

1927

1928

# Signals

1929

1387

1930

# CheckerCompleted - signal

1388

1931

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

1389

1932

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

1390

1933

"D-Bus signal"

1391

1934

pass

1392

1935

1393

1936

# CheckerStarted - signal

1394

1937

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

1395

1938

def CheckerStarted(self, command):

1396

1939

"D-Bus signal"

1397

1940

pass

1398

1941

1399

1942

# PropertyChanged - signal

1943

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

1400

1944

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

1401

1945

def PropertyChanged(self, property, value):

1402

1946

"D-Bus signal"

1403

1947

pass

1404

1948

1405

1949

# GotSecret - signal

1406

1950

@dbus.service.signal(_interface)

1407

1951

def GotSecret(self):

1410

1954

server to mandos-client

1411

1955

"""

1412

1956

pass

1413

1957

1414

1958

# Rejected - signal

1415

1959

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

1416

1960

def Rejected(self, reason):

1417

1961

"D-Bus signal"

1418

1962

pass

1419

1963

1420

1964

# NeedApproval - signal

1421

1965

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

1422

1966

def NeedApproval(self, timeout, default):

1423

1967

"D-Bus signal"

1424

1968

return self.need_approval()

1425

1426

## Methods

1427

1969

1970

# Methods

1971

1428

1972

# Approve - method

1429

1973

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

1430

1974

def Approve(self, value):

1431

1975

self.approve(value)

1432

1976

1433

1977

# CheckedOK - method

1434

1978

@dbus.service.method(_interface)

1435

1979

def CheckedOK(self):

1436

1980

self.checked_ok()

1437

1981

1438

1982

# Enable - method

1983

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

1439

1984

@dbus.service.method(_interface)

1440

1985

def Enable(self):

1441

1986

"D-Bus method"

1442

1987

self.enable()

1443

1988

1444

1989

# StartChecker - method

1990

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

1445

1991

@dbus.service.method(_interface)

1446

1992

def StartChecker(self):

1447

1993

"D-Bus method"

1448

1994

self.start_checker()

1449

1995

1450

1996

# Disable - method

1997

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

1451

1998

@dbus.service.method(_interface)

1452

1999

def Disable(self):

1453

2000

"D-Bus method"

1454

2001

self.disable()

1455

2002

1456

2003

# StopChecker - method

2004

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

1457

2005

@dbus.service.method(_interface)

1458

2006

def StopChecker(self):

1459

2007

self.stop_checker()

1460

1461

## Properties

1462

2008

2009

# Properties

2010

1463

2011

# ApprovalPending - property

1464

2012

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

1465

2013

def ApprovalPending_dbus_property(self):

1466

2014

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

1467

2015

1468

2016

# ApprovedByDefault - property

1469

@dbus_service_property(_interface, signature="b",

2017

@dbus_service_property(_interface,

2018

signature="b",

1470

2019

access="readwrite")

1471

2020

def ApprovedByDefault_dbus_property(self, value=None):

1472

2021

if value is None: # get

1473

2022

return dbus.Boolean(self.approved_by_default)

1474

2023

self.approved_by_default = bool(value)

1475

2024

1476

2025

# ApprovalDelay - property

1477

@dbus_service_property(_interface, signature="t",

2026

@dbus_service_property(_interface,

2027

signature="t",

1478

2028

access="readwrite")

1479

2029

def ApprovalDelay_dbus_property(self, value=None):

1480

2030

if value is None: # get

1481

return dbus.UInt64(self.approval_delay_milliseconds())

2031

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

2032

* 1000)

1482

2033

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

1483

2034

1484

2035

# ApprovalDuration - property

1485

@dbus_service_property(_interface, signature="t",

2036

@dbus_service_property(_interface,

2037

signature="t",

1486

2038

access="readwrite")

1487

2039

def ApprovalDuration_dbus_property(self, value=None):

1488

2040

if value is None: # get

1489

return dbus.UInt64(timedelta_to_milliseconds(

1490

self.approval_duration))

2041

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

2042

* 1000)

1491

2043

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

1492

2044

1493

2045

# Name - property

2046

@dbus_annotations(

2047

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

1494

2048

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

1495

2049

def Name_dbus_property(self):

1496

2050

return dbus.String(self.name)

1497

2051

2052

# KeyID - property

2053

@dbus_annotations(

2054

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

2055

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

2056

def KeyID_dbus_property(self):

2057

return dbus.String(self.key_id)

2058

1498

2059

# Fingerprint - property

2060

@dbus_annotations(

2061

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

1499

2062

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

1500

2063

def Fingerprint_dbus_property(self):

1501

2064

return dbus.String(self.fingerprint)

1502

2065

1503

2066

# Host - property

1504

@dbus_service_property(_interface, signature="s",

2067

@dbus_service_property(_interface,

2068

signature="s",

1505

2069

access="readwrite")

1506

2070

def Host_dbus_property(self, value=None):

1507

2071

if value is None: # get

1508

2072

return dbus.String(self.host)

1509

self.host = unicode(value)

1510

2073

self.host = str(value)

2074

1511

2075

# Created - property

2076

@dbus_annotations(

2077

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

1512

2078

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

1513

2079

def Created_dbus_property(self):

1514

2080

return datetime_to_dbus(self.created)

1515

2081

1516

2082

# LastEnabled - property

1517

2083

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

1518

2084

def LastEnabled_dbus_property(self):

1519

2085

return datetime_to_dbus(self.last_enabled)

1520

2086

1521

2087

# Enabled - property

1522

@dbus_service_property(_interface, signature="b",

2088

@dbus_service_property(_interface,

2089

signature="b",

1523

2090

access="readwrite")

1524

2091

def Enabled_dbus_property(self, value=None):

1525

2092

if value is None: # get

1528

2095

self.enable()

1529

2096

else:

1530

2097

self.disable()

1531

2098

1532

2099

# LastCheckedOK - property

1533

@dbus_service_property(_interface, signature="s",

2100

@dbus_service_property(_interface,

2101

signature="s",

1534

2102

access="readwrite")

1535

2103

def LastCheckedOK_dbus_property(self, value=None):

1536

2104

if value is not None:

1537

2105

self.checked_ok()

1538

2106

return

1539

2107

return datetime_to_dbus(self.last_checked_ok)

1540

2108

1541

2109

# LastCheckerStatus - property

1542

@dbus_service_property(_interface, signature="n",

1543

access="read")

2110

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

1544

2111

def LastCheckerStatus_dbus_property(self):

1545

2112

return dbus.Int16(self.last_checker_status)

1546

2113

1547

2114

# Expires - property

1548

2115

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

1549

2116

def Expires_dbus_property(self):

1550

2117

return datetime_to_dbus(self.expires)

1551

2118

1552

2119

# LastApprovalRequest - property

1553

2120

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

1554

2121

def LastApprovalRequest_dbus_property(self):

1555

2122

return datetime_to_dbus(self.last_approval_request)

1556

2123

1557

2124

# Timeout - property

1558

@dbus_service_property(_interface, signature="t",

2125

@dbus_service_property(_interface,

2126

signature="t",

1559

2127

access="readwrite")

1560

2128

def Timeout_dbus_property(self, value=None):

1561

2129

if value is None: # get

1562

return dbus.UInt64(self.timeout_milliseconds())

2130

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

1563

2131

old_timeout = self.timeout

1564

2132

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

1565

2133

# Reschedule disabling

1573

2141

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

1574

2142

is None):

1575

2143

return

1576

gobject.source_remove(self.disable_initiator_tag)

1577

self.disable_initiator_tag = (

1578

gobject.timeout_add(

1579

timedelta_to_milliseconds(self.expires - now),

1580

self.disable))

1581

2144

GLib.source_remove(self.disable_initiator_tag)

2145

self.disable_initiator_tag = GLib.timeout_add(

2146

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

2147

self.disable)

2148

1582

2149

# ExtendedTimeout - property

1583

@dbus_service_property(_interface, signature="t",

2150

@dbus_service_property(_interface,

2151

signature="t",

1584

2152

access="readwrite")

1585

2153

def ExtendedTimeout_dbus_property(self, value=None):

1586

2154

if value is None: # get

1587

return dbus.UInt64(self.extended_timeout_milliseconds())

2155

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

2156

* 1000)

1588

2157

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

1589

2158

1590

2159

# Interval - property

1591

@dbus_service_property(_interface, signature="t",

2160

@dbus_service_property(_interface,

2161

signature="t",

1592

2162

access="readwrite")

1593

2163

def Interval_dbus_property(self, value=None):

1594

2164

if value is None: # get

1595

return dbus.UInt64(self.interval_milliseconds())

2165

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

1596

2166

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

1597

2167

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

1598

2168

return

1599

2169

if self.enabled:

1600

2170

# Reschedule checker run

1601

gobject.source_remove(self.checker_initiator_tag)

1602

self.checker_initiator_tag = (gobject.timeout_add

1603

(value, self.start_checker))

1604

self.start_checker() # Start one now, too

1605

2171

GLib.source_remove(self.checker_initiator_tag)

2172

self.checker_initiator_tag = GLib.timeout_add(

2173

value, self.start_checker)

2174

self.start_checker() # Start one now, too

2175

1606

2176

# Checker - property

1607

@dbus_service_property(_interface, signature="s",

2177

@dbus_service_property(_interface,

2178

signature="s",

1608

2179

access="readwrite")

1609

2180

def Checker_dbus_property(self, value=None):

1610

2181

if value is None: # get

1611

2182

return dbus.String(self.checker_command)

1612

self.checker_command = unicode(value)

1613

2183

self.checker_command = str(value)

2184

1614

2185

# CheckerRunning - property

1615

@dbus_service_property(_interface, signature="b",

2186

@dbus_service_property(_interface,

2187

signature="b",

1616

2188

access="readwrite")

1617

2189

def CheckerRunning_dbus_property(self, value=None):

1618

2190

if value is None: # get

1621

2193

self.start_checker()

1622

2194

else:

1623

2195

self.stop_checker()

1624

2196

1625

2197

# ObjectPath - property

2198

@dbus_annotations(

2199

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

2200

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

1626

2201

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

1627

2202

def ObjectPath_dbus_property(self):

1628

return self.dbus_object_path # is already a dbus.ObjectPath

1629

2203

return self.dbus_object_path # is already a dbus.ObjectPath

2204

1630

2205

# Secret = property

1631

@dbus_service_property(_interface, signature="ay",

1632

access="write", byte_arrays=True)

2206

@dbus_annotations(

2207

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

2208

"invalidates"})

2209

@dbus_service_property(_interface,

2210

signature="ay",

2211

access="write",

2212

byte_arrays=True)

1633

2213

def Secret_dbus_property(self, value):

1634

self.secret = str(value)

1635

2214

self.secret = bytes(value)

2215

1636

2216

del _interface

1637

2217

1638

2218

1639

class ProxyClient(object):

1640

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

2219

class ProxyClient:

2220

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

1641

2221

self._pipe = child_pipe

1642

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

2222

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

1643

2223

if not self._pipe.recv():

1644

raise KeyError()

1645

2224

raise KeyError(key_id or fpr)

2225

1646

2226

def __getattribute__(self, name):

1647

2227

if name == '_pipe':

1648

2228

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

1651

2231

if data[0] == 'data':

1652

2232

return data[1]

1653

2233

if data[0] == 'function':

2234

1654

2235

def func(*args, **kwargs):

1655

2236

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

1656

2237

return self._pipe.recv()[1]

2238

1657

2239

return func

1658

2240

1659

2241

def __setattr__(self, name, value):

1660

2242

if name == '_pipe':

1661

2243

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

1664

2246

1665

2247

class ClientHandler(socketserver.BaseRequestHandler, object):

1666

2248

"""A class to handle client connections.

1667

2249

1668

2250

Instantiated once for each connection to handle it.

1669

2251

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

1670

2252

1671

2253

def handle(self):

1672

2254

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

1673

2255

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

1674

unicode(self.client_address))

2256

str(self.client_address))

1675

2257

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

1676

2258

self.server.child_pipe.fileno())

1677

1678

session = (gnutls.connection

1679

.ClientSession(self.request,

1680

gnutls.connection

1681

.X509Credentials()))

1682

1683

# Note: gnutls.connection.X509Credentials is really a

1684

# generic GnuTLS certificate credentials object so long as

1685

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

1686

# here despite using OpenPGP certificates.

1687

1688

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

1689

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

1690

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

1691

# "+DHE-DSS"))

2259

2260

session = gnutls.ClientSession(self.request)

2261

2262

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

2263

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

2264

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

2265

# "+DHE-DSS"))

1692

2266

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

1693

2267

priority = self.server.gnutls_priority

1694

2268

if priority is None:

1695

2269

priority = "NORMAL"

1696

(gnutls.library.functions

1697

.gnutls_priority_set_direct(session._c_object,

1698

priority, None))

1699

2270

gnutls.priority_set_direct(session._c_object,

2271

priority.encode("utf-8"),

2272

None)

2273

1700

2274

# Start communication using the Mandos protocol

1701

2275

# Get protocol number

1702

2276

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

1707

2281

except (ValueError, IndexError, RuntimeError) as error:

1708

2282

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

1709

2283

return

1710

2284

1711

2285

# Start GnuTLS connection

1712

2286

try:

1713

2287

session.handshake()

1714

except gnutls.errors.GNUTLSError as error:

2288

except gnutls.Error as error:

1715

2289

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

1716

2290

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

1717

2291

# established. Just abandon the request.

1718

2292

return

1719

2293

logger.debug("Handshake succeeded")

1720

2294

1721

2295

approval_required = False

1722

2296

try:

1723

try:

1724

fpr = self.fingerprint(self.peer_certificate

1725

(session))

1726

except (TypeError,

1727

gnutls.errors.GNUTLSError) as error:

1728

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

1729

return

1730

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

1731

1732

try:

1733

client = ProxyClient(child_pipe, fpr,

2297

if gnutls.has_rawpk:

2298

fpr = b""

2299

try:

2300

key_id = self.key_id(

2301

self.peer_certificate(session))

2302

except (TypeError, gnutls.Error) as error:

2303

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

2304

return

2305

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

2306

2307

else:

2308

key_id = b""

2309

try:

2310

fpr = self.fingerprint(

2311

self.peer_certificate(session))

2312

except (TypeError, gnutls.Error) as error:

2313

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

2314

return

2315

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

2316

2317

try:

2318

client = ProxyClient(child_pipe, key_id, fpr,

1734

2319

self.client_address)

1735

2320

except KeyError:

1736

2321

return

1737

2322

1738

2323

if client.approval_delay:

1739

2324

delay = client.approval_delay

1740

2325

client.approvals_pending += 1

1741

2326

approval_required = True

1742

2327

1743

2328

while True:

1744

2329

if not client.enabled:

1745

2330

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

1746

client.name)

2331

client.name)

1747

2332

if self.server.use_dbus:

1748

2333

# Emit D-Bus signal

1749

2334

client.Rejected("Disabled")

1750

2335

return

1751

2336

1752

2337

if client.approved or not client.approval_delay:

1753

#We are approved or approval is disabled

2338

# We are approved or approval is disabled

1754

2339

break

1755

2340

elif client.approved is None:

1756

2341

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

1758

2343

if self.server.use_dbus:

1759

2344

# Emit D-Bus signal

1760

2345

client.NeedApproval(

1761

client.approval_delay_milliseconds(),

1762

client.approved_by_default)

2346

client.approval_delay.total_seconds()

2347

* 1000, client.approved_by_default)

1763

2348

else:

1764

2349

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

1765

2350

client.name)

1767

2352

# Emit D-Bus signal

1768

2353

client.Rejected("Denied")

1769

2354

return

1770

1771

#wait until timeout or approved

2355

2356

# wait until timeout or approved

1772

2357

time = datetime.datetime.now()

1773

2358

client.changedstate.acquire()

1774

client.changedstate.wait(

1775

float(timedelta_to_milliseconds(delay)

1776

/ 1000))

2359

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

1777

2360

client.changedstate.release()

1778

2361

time2 = datetime.datetime.now()

1779

2362

if (time2 - time) >= delay:

1789

2372

break

1790

2373

else:

1791

2374

delay -= time2 - time

1792

1793

sent_size = 0

1794

while sent_size < len(client.secret):

1795

try:

1796

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

1797

except gnutls.errors.GNUTLSError as error:

1798

logger.warning("gnutls send failed",

1799

exc_info=error)

1800

return

1801

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

1802

sent, len(client.secret)

1803

- (sent_size + sent))

1804

sent_size += sent

1805

2375

2376

try:

2377

session.send(client.secret)

2378

except gnutls.Error as error:

2379

logger.warning("gnutls send failed",

2380

exc_info=error)

2381

return

2382

1806

2383

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

1807

2384

# bump the timeout using extended_timeout

1808

2385

client.bump_timeout(client.extended_timeout)

1809

2386

if self.server.use_dbus:

1810

2387

# Emit D-Bus signal

1811

2388

client.GotSecret()

1812

2389

1813

2390

finally:

1814

2391

if approval_required:

1815

2392

client.approvals_pending -= 1

1816

2393

try:

1817

2394

session.bye()

1818

except gnutls.errors.GNUTLSError as error:

2395

except gnutls.Error as error:

1819

2396

logger.warning("GnuTLS bye failed",

1820

2397

exc_info=error)

1821

2398

1822

2399

@staticmethod

1823

2400

def peer_certificate(session):

1824

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

1825

# If not an OpenPGP certificate...

1826

if (gnutls.library.functions

1827

.gnutls_certificate_type_get(session._c_object)

1828

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1829

# ...do the normal thing

1830

return session.peer_certificate

2401

"Return the peer's certificate as a bytestring"

2402

try:

2403

cert_type = gnutls.certificate_type_get2(session._c_object,

2404

gnutls.CTYPE_PEERS)

2405

except AttributeError:

2406

cert_type = gnutls.certificate_type_get(session._c_object)

2407

if gnutls.has_rawpk:

2408

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2409

else:

2410

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2411

# If not a valid certificate type...

2412

if cert_type not in valid_cert_types:

2413

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

2414

valid_cert_types)

2415

# ...return invalid data

2416

return b""

1831

2417

list_size = ctypes.c_uint(1)

1832

cert_list = (gnutls.library.functions

1833

.gnutls_certificate_get_peers

2418

cert_list = (gnutls.certificate_get_peers

1834

2419

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

1835

2420

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

1836

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

1837

" certificate")

2421

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

1838

2422

if list_size.value == 0:

1839

2423

return None

1840

2424

cert = cert_list[0]

1841

2425

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

1842

2426

2427

@staticmethod

2428

def key_id(certificate):

2429

"Convert a certificate bytestring to a hexdigit key ID"

2430

# New GnuTLS "datum" with the public key

2431

datum = gnutls.datum_t(

2432

ctypes.cast(ctypes.c_char_p(certificate),

2433

ctypes.POINTER(ctypes.c_ubyte)),

2434

ctypes.c_uint(len(certificate)))

2435

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

2436

# New empty GnuTLS certificate

2437

pubkey = gnutls.pubkey_t()

2438

gnutls.pubkey_init(ctypes.byref(pubkey))

2439

# Import the raw public key into the certificate

2440

gnutls.pubkey_import(pubkey,

2441

ctypes.byref(datum),

2442

gnutls.X509_FMT_DER)

2443

# New buffer for the key ID

2444

buf = ctypes.create_string_buffer(32)

2445

buf_len = ctypes.c_size_t(len(buf))

2446

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

2447

gnutls.pubkey_get_key_id(pubkey,

2448

gnutls.KEYID_USE_SHA256,

2449

ctypes.cast(ctypes.byref(buf),

2450

ctypes.POINTER(ctypes.c_ubyte)),

2451

ctypes.byref(buf_len))

2452

# Deinit the certificate

2453

gnutls.pubkey_deinit(pubkey)

2454

2455

# Convert the buffer to a Python bytestring

2456

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

2457

# Convert the bytestring to hexadecimal notation

2458

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

2459

return hex_key_id

2460

1843

2461

@staticmethod

1844

2462

def fingerprint(openpgp):

1845

2463

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1846

2464

# New GnuTLS "datum" with the OpenPGP public key

1847

datum = (gnutls.library.types

1848

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

1849

ctypes.POINTER

1850

(ctypes.c_ubyte)),

1851

ctypes.c_uint(len(openpgp))))

2465

datum = gnutls.datum_t(

2466

ctypes.cast(ctypes.c_char_p(openpgp),

2467

ctypes.POINTER(ctypes.c_ubyte)),

2468

ctypes.c_uint(len(openpgp)))

1852

2469

# New empty GnuTLS certificate

1853

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1854

(gnutls.library.functions

1855

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2470

crt = gnutls.openpgp_crt_t()

2471

gnutls.openpgp_crt_init(ctypes.byref(crt))

1856

2472

# Import the OpenPGP public key into the certificate

1857

(gnutls.library.functions

1858

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

1859

gnutls.library.constants

1860

.GNUTLS_OPENPGP_FMT_RAW))

2473

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

2474

gnutls.OPENPGP_FMT_RAW)

1861

2475

# Verify the self signature in the key

1862

2476

crtverify = ctypes.c_uint()

1863

(gnutls.library.functions

1864

.gnutls_openpgp_crt_verify_self(crt, 0,

1865

ctypes.byref(crtverify)))

2477

gnutls.openpgp_crt_verify_self(crt, 0,

2478

ctypes.byref(crtverify))

1866

2479

if crtverify.value != 0:

1867

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1868

raise (gnutls.errors.CertificateSecurityError

1869

("Verify failed"))

2480

gnutls.openpgp_crt_deinit(crt)

2481

raise gnutls.CertificateSecurityError(code

2482

=crtverify.value)

1870

2483

# New buffer for the fingerprint

1871

2484

buf = ctypes.create_string_buffer(20)

1872

2485

buf_len = ctypes.c_size_t()

1873

2486

# Get the fingerprint from the certificate into the buffer

1874

(gnutls.library.functions

1875

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

1876

ctypes.byref(buf_len)))

2487

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

2488

ctypes.byref(buf_len))

1877

2489

# Deinit the certificate

1878

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2490

gnutls.openpgp_crt_deinit(crt)

1879

2491

# Convert the buffer to a Python bytestring

1880

2492

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

1881

2493

# Convert the bytestring to hexadecimal notation

1883

2495

return hex_fpr

1884

2496

1885

2497

1886

class MultiprocessingMixIn(object):

2498

class MultiprocessingMixIn:

1887

2499

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

2500

1888

2501

def sub_process_main(self, request, address):

1889

2502

try:

1890

2503

self.finish_request(request, address)

1891

2504

except Exception:

1892

2505

self.handle_error(request, address)

1893

2506

self.close_request(request)

1894

2507

1895

2508

def process_request(self, request, address):

1896

2509

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

1897

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

1898

args = (request, address))

2510

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

2511

args=(request, address))

1899

2512

proc.start()

1900

2513

return proc

1901

2514

1902

2515

1903

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2516

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

1904

2517

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

2518

1905

2519

def process_request(self, request, client_address):

1906

2520

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

1907

2521

1908

2522

This function creates a new pipe in self.pipe

1909

2523

"""

1910

2524

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1911

2525

1912

2526

proc = MultiprocessingMixIn.process_request(self, request,

1913

2527

client_address)

1914

2528

self.child_pipe.close()

1915

2529

self.add_pipe(parent_pipe, proc)

1916

2530

1917

2531

def add_pipe(self, parent_pipe, proc):

1918

2532

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

1919

2533

raise NotImplementedError()

1920

2534

1921

2535

1922

2536

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1923

socketserver.TCPServer, object):

2537

socketserver.TCPServer):

1924

2538

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

1925

2539

1926

2540

Attributes:

1927

2541

enabled: Boolean; whether this server is activated yet

1928

2542

interface: None or a network interface name (string)

1929

2543

use_ipv6: Boolean; to use IPv6 or not

1930

2544

"""

2545

1931

2546

def __init__(self, server_address, RequestHandlerClass,

1932

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

2547

interface=None,

2548

use_ipv6=True,

2549

socketfd=None):

1933

2550

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

1934

2551

creating a new one with socket.socket().

1935

2552

"""

1941

2558

self.socketfd = socketfd

1942

2559

# Save the original socket.socket() function

1943

2560

self.socket_socket = socket.socket

2561

1944

2562

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

1945

#

2563

#

1946

2564

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

1947

2565

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

1948

2566

# patching socket.socket.)

1949

#

2567

#

1950

2568

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

1951

2569

@functools.wraps(socket.socket)

1952

2570

def socket_wrapper(*args, **kwargs):

1964

2582

# socket_wrapper(), if socketfd was set.

1965

2583

socketserver.TCPServer.__init__(self, server_address,

1966

2584

RequestHandlerClass)

1967

2585

1968

2586

def server_bind(self):

1969

2587

"""This overrides the normal server_bind() function

1970

2588

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

1971

2589

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

2590

global SO_BINDTODEVICE

1972

2591

if self.interface is not None:

1973

2592

if SO_BINDTODEVICE is None:

1974

logger.error("SO_BINDTODEVICE does not exist;"

1975

" cannot bind to interface %s",

1976

self.interface)

1977

else:

1978

try:

1979

self.socket.setsockopt(socket.SOL_SOCKET,

1980

SO_BINDTODEVICE,

1981

str(self.interface + '\0'))

1982

except socket.error as error:

1983

if error.errno == errno.EPERM:

1984

logger.error("No permission to bind to"

1985

" interface %s", self.interface)

1986

elif error.errno == errno.ENOPROTOOPT:

1987

logger.error("SO_BINDTODEVICE not available;"

1988

" cannot bind to interface %s",

1989

self.interface)

1990

elif error.errno == errno.ENODEV:

1991

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

1992

" cannot bind", self.interface)

1993

else:

1994

raise

2593

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

2594

# common enough.

2595

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

2596

SO_BINDTODEVICE = 25

2597

try:

2598

self.socket.setsockopt(

2599

socket.SOL_SOCKET, SO_BINDTODEVICE,

2600

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

2601

except socket.error as error:

2602

if error.errno == errno.EPERM:

2603

logger.error("No permission to bind to"

2604

" interface %s", self.interface)

2605

elif error.errno == errno.ENOPROTOOPT:

2606

logger.error("SO_BINDTODEVICE not available;"

2607

" cannot bind to interface %s",

2608

self.interface)

2609

elif error.errno == errno.ENODEV:

2610

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

2611

" cannot bind", self.interface)

2612

else:

2613

raise

1995

2614

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

1996

2615

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

2616

if self.server_address[1]:

2617

self.allow_reuse_address = True

1997

2618

if not self.server_address[0]:

1998

2619

if self.address_family == socket.AF_INET6:

1999

any_address = "::" # in6addr_any

2620

any_address = "::" # in6addr_any

2000

2621

else:

2001

any_address = "0.0.0.0" # INADDR_ANY

2622

any_address = "0.0.0.0" # INADDR_ANY

2002

2623

self.server_address = (any_address,

2003

2624

self.server_address[1])

2004

2625

elif not self.server_address[1]:

2005

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

2006

0)

2626

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

2007

2627

# if self.interface:

2008

2628

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

2009

2629

# 0, # port

2015

2635

2016

2636

class MandosServer(IPv6_TCPServer):

2017

2637

"""Mandos server.

2018

2638

2019

2639

Attributes:

2020

2640

clients: set of Client objects

2021

2641

gnutls_priority GnuTLS priority string

2022

2642

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

2023

2024

Assumes a gobject.MainLoop event loop.

2643

2644

Assumes a GLib.MainLoop event loop.

2025

2645

"""

2646

2026

2647

def __init__(self, server_address, RequestHandlerClass,

2027

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

2028

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

2648

interface=None,

2649

use_ipv6=True,

2650

clients=None,

2651

gnutls_priority=None,

2652

use_dbus=True,

2653

socketfd=None):

2029

2654

self.enabled = False

2030

2655

self.clients = clients

2031

2656

if self.clients is None:

2034

2659

self.gnutls_priority = gnutls_priority

2035

2660

IPv6_TCPServer.__init__(self, server_address,

2036

2661

RequestHandlerClass,

2037

interface = interface,

2038

use_ipv6 = use_ipv6,

2039

socketfd = socketfd)

2662

interface=interface,

2663

use_ipv6=use_ipv6,

2664

socketfd=socketfd)

2665

2040

2666

def server_activate(self):

2041

2667

if self.enabled:

2042

2668

return socketserver.TCPServer.server_activate(self)

2043

2669

2044

2670

def enable(self):

2045

2671

self.enabled = True

2046

2672

2047

2673

def add_pipe(self, parent_pipe, proc):

2048

2674

# Call "handle_ipc" for both data and EOF events

2049

gobject.io_add_watch(parent_pipe.fileno(),

2050

gobject.IO_IN | gobject.IO_HUP,

2051

functools.partial(self.handle_ipc,

2052

parent_pipe =

2053

parent_pipe,

2054

proc = proc))

2055

2056

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

2057

proc = None, client_object=None):

2675

GLib.io_add_watch(

2676

parent_pipe.fileno(),

2677

GLib.IO_IN | GLib.IO_HUP,

2678

functools.partial(self.handle_ipc,

2679

parent_pipe=parent_pipe,

2680

proc=proc))

2681

2682

def handle_ipc(self, source, condition,

2683

parent_pipe=None,

2684

proc=None,

2685

client_object=None):

2058

2686

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

2059

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

2687

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

2060

2688

# Wait for other process to exit

2061

2689

proc.join()

2062

2690

return False

2063

2691

2064

2692

# Read a request from the child

2065

2693

request = parent_pipe.recv()

2066

2694

command = request[0]

2067

2695

2068

2696

if command == 'init':

2069

fpr = request[1]

2070

address = request[2]

2071

2072

for c in self.clients.itervalues():

2073

if c.fingerprint == fpr:

2697

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

2698

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

2699

address = request[3]

2700

2701

for c in self.clients.values():

2702

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2703

continue

2704

if key_id and c.key_id == key_id:

2705

client = c

2706

break

2707

if fpr and c.fingerprint == fpr:

2074

2708

client = c

2075

2709

break

2076

2710

else:

2077

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

2078

"dress: %s", fpr, address)

2711

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

2712

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

2079

2713

if self.use_dbus:

2080

2714

# Emit D-Bus signal

2081

mandos_dbus_service.ClientNotFound(fpr,

2715

mandos_dbus_service.ClientNotFound(key_id or fpr,

2082

2716

address[0])

2083

2717

parent_pipe.send(False)

2084

2718

return False

2085

2086

gobject.io_add_watch(parent_pipe.fileno(),

2087

gobject.IO_IN | gobject.IO_HUP,

2088

functools.partial(self.handle_ipc,

2089

parent_pipe =

2090

parent_pipe,

2091

proc = proc,

2092

client_object =

2093

client))

2719

2720

GLib.io_add_watch(

2721

parent_pipe.fileno(),

2722

GLib.IO_IN | GLib.IO_HUP,

2723

functools.partial(self.handle_ipc,

2724

parent_pipe=parent_pipe,

2725

proc=proc,

2726

client_object=client))

2094

2727

parent_pipe.send(True)

2095

2728

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

2096

2729

# same fileno

2099

2732

funcname = request[1]

2100

2733

args = request[2]

2101

2734

kwargs = request[3]

2102

2735

2103

2736

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

2104

2737

funcname)(*args,

2105

**kwargs)))

2106

2738

**kwargs)))

2739

2107

2740

if command == 'getattr':

2108

2741

attrname = request[1]

2109

if callable(client_object.__getattribute__(attrname)):

2110

parent_pipe.send(('function',))

2742

if isinstance(client_object.__getattribute__(attrname),

2743

collections.Callable):

2744

parent_pipe.send(('function', ))

2111

2745

else:

2112

parent_pipe.send(('data', client_object

2113

.__getattribute__(attrname)))

2114

2746

parent_pipe.send((

2747

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

2748

2115

2749

if command == 'setattr':

2116

2750

attrname = request[1]

2117

2751

value = request[2]

2118

2752

setattr(client_object, attrname, value)

2119

2753

2120

2754

return True

2121

2755

2122

2756

2123

2757

def rfc3339_duration_to_delta(duration):

2124

2758

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

2125

2759

2126

2760

>>> rfc3339_duration_to_delta("P7D")

2127

2761

datetime.timedelta(7)

2128

2762

>>> rfc3339_duration_to_delta("PT60S")

2138

2772

>>> rfc3339_duration_to_delta("P1DT3M20S")

2139

2773

datetime.timedelta(1, 200)

2140

2774

"""

2141

2775

2142

2776

# Parsing an RFC 3339 duration with regular expressions is not

2143

2777

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

2144

2778

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

2145

2779

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

2146

2780

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

2147

2781

# avoid excessive use of external libraries.

2148

2782

2149

2783

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

2150

Token = collections.namedtuple("Token",

2151

("regexp", # To match token; if

2152

# "value" is not None,

2153

# must have a "group"

2154

# containing digits

2155

"value", # datetime.timedelta or

2156

# None

2157

"followers")) # Tokens valid after

2158

# this token

2784

Token = collections.namedtuple("Token", (

2785

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

2786

# a "group" containing digits

2787

"value", # datetime.timedelta or None

2788

"followers")) # Tokens valid after this token

2159

2789

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

2160

2790

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

2161

2791

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

2162

2792

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

2163

2793

datetime.timedelta(seconds=1),

2164

frozenset((token_end,)))

2794

frozenset((token_end, )))

2165

2795

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

2166

2796

datetime.timedelta(minutes=1),

2167

2797

frozenset((token_second, token_end)))

2183

2813

frozenset((token_month, token_end)))

2184

2814

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

2185

2815

datetime.timedelta(weeks=1),

2186

frozenset((token_end,)))

2816

frozenset((token_end, )))

2187

2817

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

2188

2818

frozenset((token_year, token_month,

2189

2819

token_day, token_time,

2190

token_week))),

2191

# Define starting values

2192

value = datetime.timedelta() # Value so far

2820

token_week)))

2821

# Define starting values:

2822

# Value so far

2823

value = datetime.timedelta()

2193

2824

found_token = None

2194

followers = frozenset(token_duration,) # Following valid tokens

2195

s = duration # String left to parse

2825

# Following valid tokens

2826

followers = frozenset((token_duration, ))

2827

# String left to parse

2828

s = duration

2196

2829

# Loop until end token is found

2197

2830

while found_token is not token_end:

2198

2831

# Search for any currently valid tokens

2214

2847

break

2215

2848

else:

2216

2849

# No currently valid tokens were found

2217

raise ValueError("Invalid RFC 3339 duration")

2850

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

2851

.format(duration))

2218

2852

# End token found

2219

2853

return value

2220

2854

2221

2855

2222

2856

def string_to_delta(interval):

2223

2857

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

2224

2858

2225

2859

>>> string_to_delta('7d')

2226

2860

datetime.timedelta(7)

2227

2861

>>> string_to_delta('60s')

2235

2869

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

2236

2870

datetime.timedelta(0, 330)

2237

2871

"""

2238

2872

2239

2873

try:

2240

2874

return rfc3339_duration_to_delta(interval)

2241

2875

except ValueError:

2242

2876

pass

2243

2877

2244

2878

timevalue = datetime.timedelta(0)

2245

2879

for s in interval.split():

2246

2880

try:

2247

suffix = unicode(s[-1])

2881

suffix = s[-1]

2248

2882

value = int(s[:-1])

2249

2883

if suffix == "d":

2250

2884

delta = datetime.timedelta(value)

2257

2891

elif suffix == "w":

2258

2892

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

2259

2893

else:

2260

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

2261

.format(suffix))

2894

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

2262

2895

except IndexError as e:

2263

2896

raise ValueError(*(e.args))

2264

2897

timevalue += delta

2265

2898

return timevalue

2266

2899

2267

2900

2268

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

2901

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

2269

2902

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

2270

2903

2271

2904

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

2272

2905

if os.fork():

2273

2906

sys.exit()

2281

2914

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

2282

2915

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

2283

2916

raise OSError(errno.ENODEV,

2284

"{0} not a character device"

2917

"{} not a character device"

2285

2918

.format(os.devnull))

2286

2919

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

2287

2920

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

2291

2924

2292

2925

2293

2926

def main():

2294

2927

2295

2928

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

2296

2929

# Parsing of options, both command line and config file

2297

2930

2298

2931

parser = argparse.ArgumentParser()

2299

2932

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

2300

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

2933

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

2301

2934

help="show version number and exit")

2302

2935

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

2303

2936

help="Bind to interface IF")

2336

2969

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

2337

2970

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

2338

2971

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

2339

2972

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

2973

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

2974

default=None)

2975

2340

2976

options = parser.parse_args()

2341

2977

2342

2978

if options.check:

2343

2979

import doctest

2344

doctest.testmod()

2345

sys.exit()

2346

2980

fail_count, test_count = doctest.testmod()

2981

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

2982

2347

2983

# Default values for config file for server-global settings

2348

server_defaults = { "interface": "",

2349

"address": "",

2350

"port": "",

2351

"debug": "False",

2352

"priority":

2353

"SECURE256:!CTYPE-X.509:+CTYPE-OPENPGP:+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",

2354

"servicename": "Mandos",

2355

"use_dbus": "True",

2356

"use_ipv6": "True",

2357

"debuglevel": "",

2358

"restore": "True",

2359

"socket": "",

2360

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

2361

"foreground": "False",

2362

}

2363

2984

if gnutls.has_rawpk:

2985

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

2986

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

2987

else:

2988

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

2989

":+SIGN-DSA-SHA256")

2990

server_defaults = {"interface": "",

2991

"address": "",

2992

"port": "",

2993

"debug": "False",

2994

"priority": priority,

2995

"servicename": "Mandos",

2996

"use_dbus": "True",

2997

"use_ipv6": "True",

2998

"debuglevel": "",

2999

"restore": "True",

3000

"socket": "",

3001

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

3002

"foreground": "False",

3003

"zeroconf": "True",

3004

}

3005

del priority

3006

2364

3007

# Parse config file for server-global settings

2365

server_config = configparser.SafeConfigParser(server_defaults)

3008

server_config = configparser.ConfigParser(server_defaults)

2366

3009

del server_defaults

2367

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

2368

"mandos.conf"))

2369

# Convert the SafeConfigParser object to a dict

3010

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

3011

# Convert the ConfigParser object to a dict

2370

3012

server_settings = server_config.defaults()

2371

3013

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

2372

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

3014

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

3015

"foreground", "zeroconf"):

2373

3016

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

2374

3017

option)

2375

3018

if server_settings["port"]:

2385

3028

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

2386

3029

["socket"])

2387

3030

del server_config

2388

3031

2389

3032

# Override the settings from the config file with command line

2390

3033

# options, if set.

2391

3034

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

2392

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

2393

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

2394

"statedir", "socket", "foreground"):

3035

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

3036

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

3037

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

2395

3038

value = getattr(options, option)

2396

3039

if value is not None:

2397

3040

server_settings[option] = value

2398

3041

del options

2399

3042

# Force all strings to be unicode

2400

3043

for option in server_settings.keys():

2401

if type(server_settings[option]) is str:

2402

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

3044

if isinstance(server_settings[option], bytes):

3045

server_settings[option] = (server_settings[option]

3046

.decode("utf-8"))

2403

3047

# Force all boolean options to be boolean

2404

3048

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

2405

"foreground"):

3049

"foreground", "zeroconf"):

2406

3050

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

2407

3051

# Debug implies foreground

2408

3052

if server_settings["debug"]:

2409

3053

server_settings["foreground"] = True

2410

3054

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

2411

3055

2412

3056

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

2413

3057

3058

if (not server_settings["zeroconf"]

3059

and not (server_settings["port"]

3060

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

3061

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

3062

2414

3063

# For convenience

2415

3064

debug = server_settings["debug"]

2416

3065

debuglevel = server_settings["debuglevel"]

2419

3068

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

2420

3069

stored_state_file)

2421

3070

foreground = server_settings["foreground"]

2422

3071

zeroconf = server_settings["zeroconf"]

3072

2423

3073

if debug:

2424

3074

initlogger(debug, logging.DEBUG)

2425

3075

else:

2428

3078

else:

2429

3079

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

2430

3080

initlogger(debug, level)

2431

3081

2432

3082

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

2433

syslogger.setFormatter(logging.Formatter

2434

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

2435

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

2436

.format(server_settings

2437

["servicename"])))

2438

3083

syslogger.setFormatter(

3084

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

3085

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

3086

server_settings["servicename"])))

3087

2439

3088

# Parse config file with clients

2440

client_config = configparser.SafeConfigParser(Client

2441

.client_defaults)

3089

client_config = configparser.ConfigParser(Client.client_defaults)

2442

3090

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

2443

3091

"clients.conf"))

2444

3092

2445

3093

global mandos_dbus_service

2446

3094

mandos_dbus_service = None

2447

2448

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

2449

server_settings["port"]),

2450

ClientHandler,

2451

interface=(server_settings["interface"]

2452

or None),

2453

use_ipv6=use_ipv6,

2454

gnutls_priority=

2455

server_settings["priority"],

2456

use_dbus=use_dbus,

2457

socketfd=(server_settings["socket"]

2458

or 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)

2459

3107

if not foreground:

2460

3108

pidfilename = "/run/mandos.pid"

2461

3109

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

2462

3110

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

2463

3111

pidfile = None

2464

3112

try:

2465

pidfile = open(pidfilename, "w")

3113

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

2466

3114

except IOError as e:

2467

3115

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

2468

3116

exc_info=e)

2469

2470

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

3117

3118

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

3119

("mandos", "mandos"),

3120

("nobody", "nogroup")):

2471

3121

try:

2472

3122

uid = pwd.getpwnam(name).pw_uid

2473

gid = pwd.getpwnam(name).pw_gid

3123

gid = pwd.getpwnam(group).pw_gid

2474

3124

break

2475

3125

except KeyError:

2476

3126

continue

2480

3130

try:

2481

3131

os.setgid(gid)

2482

3132

os.setuid(uid)

3133

if debug:

3134

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

3135

gid))

2483

3136

except OSError as error:

3137

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

3138

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

2484

3139

if error.errno != errno.EPERM:

2485

3140

raise

2486

3141

2487

3142

if debug:

2488

3143

# Enable all possible GnuTLS debugging

2489

3144

2490

3145

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

2491

3146

# - GnuTLS manual

2492

gnutls.library.functions.gnutls_global_set_log_level(11)

2493

2494

@gnutls.library.types.gnutls_log_func

3147

gnutls.global_set_log_level(11)

3148

3149

@gnutls.log_func

2495

3150

def debug_gnutls(level, string):

2496

3151

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

2497

2498

(gnutls.library.functions

2499

.gnutls_global_set_log_function(debug_gnutls))

2500

3152

3153

gnutls.global_set_log_function(debug_gnutls)

3154

2501

3155

# Redirect stdin so all checkers get /dev/null

2502

3156

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

2503

3157

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

2504

3158

if null > 2:

2505

3159

os.close(null)

2506

3160

2507

3161

# Need to fork before connecting to D-Bus

2508

3162

if not foreground:

2509

3163

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

2510

3164

daemon()

2511

2512

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

2513

# need to inform gobject that threads will be used.

2514

gobject.threads_init()

2515

3165

3166

if gi.version_info < (3, 10, 2):

3167

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

3168

# need to inform GLib that threads will be used.

3169

GLib.threads_init()

3170

2516

3171

global main_loop

2517

3172

# From the Avahi example code

2518

3173

DBusGMainLoop(set_as_default=True)

2519

main_loop = gobject.MainLoop()

3174

main_loop = GLib.MainLoop()

2520

3175

bus = dbus.SystemBus()

2521

3176

# End of Avahi example code

2522

3177

if use_dbus:

2523

3178

try:

2524

3179

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

2525

bus, do_not_queue=True)

2526

old_bus_name = (dbus.service.BusName

2527

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

2528

do_not_queue=True))

2529

except dbus.exceptions.NameExistsException as e:

3180

bus,

3181

do_not_queue=True)

3182

old_bus_name = dbus.service.BusName(

3183

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

3184

do_not_queue=True)

3185

except dbus.exceptions.DBusException as e:

2530

3186

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

2531

3187

use_dbus = False

2532

3188

server_settings["use_dbus"] = False

2533

3189

tcp_server.use_dbus = False

2534

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2535

service = AvahiServiceToSyslog(name =

2536

server_settings["servicename"],

2537

servicetype = "_mandos._tcp",

2538

protocol = protocol, bus = bus)

2539

if server_settings["interface"]:

2540

service.interface = (if_nametoindex

2541

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

2542

3190

if zeroconf:

3191

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3192

service = AvahiServiceToSyslog(

3193

name=server_settings["servicename"],

3194

servicetype="_mandos._tcp",

3195

protocol=protocol,

3196

bus=bus)

3197

if server_settings["interface"]:

3198

service.interface = if_nametoindex(

3199

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

3200

2543

3201

global multiprocessing_manager

2544

3202

multiprocessing_manager = multiprocessing.Manager()

2545

3203

2546

3204

client_class = Client

2547

3205

if use_dbus:

2548

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

2549

3206

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

3207

2550

3208

client_settings = Client.config_parser(client_config)

2551

3209

old_client_settings = {}

2552

3210

clients_data = {}

2553

3211

2554

3212

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

2555

3213

global wnull

2556

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

3214

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

2557

3215

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

2558

3216

# mode

2559

3217

if debug or not foreground:

2560

3218

wnull.close()

2561

3219

2562

3220

# Get client data and settings from last running state.

2563

3221

if server_settings["restore"]:

2564

3222

try:

2565

3223

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

2566

clients_data, old_client_settings = (pickle.load

2567

(stored_state))

3224

if sys.version_info.major == 2:

3225

clients_data, old_client_settings = pickle.load(

3226

stored_state)

3227

else:

3228

bytes_clients_data, bytes_old_client_settings = (

3229

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

3230

# Fix bytes to strings

3231

# clients_data

3232

# .keys()

3233

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

3234

if isinstance(key, bytes)

3235

else key): value

3236

for key, value in

3237

bytes_clients_data.items()}

3238

del bytes_clients_data

3239

for key in clients_data:

3240

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

3241

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

3242

for k, v in

3243

clients_data[key].items()}

3244

clients_data[key] = value

3245

# .client_structure

3246

value["client_structure"] = [

3247

(s.decode("utf-8")

3248

if isinstance(s, bytes)

3249

else s) for s in

3250

value["client_structure"]]

3251

# .name & .host

3252

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

3253

if isinstance(value[k], bytes):

3254

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

3255

if "key_id" not in value:

3256

value["key_id"] = ""

3257

elif "fingerprint" not in value:

3258

value["fingerprint"] = ""

3259

# old_client_settings

3260

# .keys()

3261

old_client_settings = {

3262

(key.decode("utf-8")

3263

if isinstance(key, bytes)

3264

else key): value

3265

for key, value in

3266

bytes_old_client_settings.items()}

3267

del bytes_old_client_settings

3268

# .host

3269

for value in old_client_settings.values():

3270

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

3271

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

3272

.decode("utf-8"))

2568

3273

os.remove(stored_state_path)

2569

3274

except IOError as e:

2570

3275

if e.errno == errno.ENOENT:

2571

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

2572

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

3276

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

3277

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

2573

3278

else:

2574

3279

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

2575

3280

exc_info=e)

2576

3281

raise

2577

3282

except EOFError as e:

2578

3283

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

2579

"EOFError:", exc_info=e)

2580

3284

"EOFError:",

3285

exc_info=e)

3286

2581

3287

with PGPEngine() as pgp:

2582

for client_name, client in clients_data.iteritems():

3288

for client_name, client in clients_data.items():

2583

3289

# Skip removed clients

2584

3290

if client_name not in client_settings:

2585

3291

continue

2586

3292

2587

3293

# Decide which value to use after restoring saved state.

2588

3294

# We have three different values: Old config file,

2589

3295

# new config file, and saved state.

2594

3300

# For each value in new config, check if it

2595

3301

# differs from the old config value (Except for

2596

3302

# the "secret" attribute)

2597

if (name != "secret" and

2598

value != old_client_settings[client_name]

2599

[name]):

3303

if (name != "secret"

3304

and (value !=

3305

old_client_settings[client_name][name])):

2600

3306

client[name] = value

2601

3307

except KeyError:

2602

3308

pass

2603

3309

2604

3310

# Clients who has passed its expire date can still be

2605

# enabled if its last checker was successful. Clients

3311

# enabled if its last checker was successful. A Client

2606

3312

# whose checker succeeded before we stored its state is

2607

3313

# assumed to have successfully run all checkers during

2608

3314

# downtime.

2610

3316

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

2611

3317

if not client["last_checked_ok"]:

2612

3318

logger.warning(

2613

"disabling client {0} - Client never "

2614

"performed a successful checker"

2615

.format(client_name))

3319

"disabling client {} - Client never "

3320

"performed a successful checker".format(

3321

client_name))

2616

3322

client["enabled"] = False

2617

3323

elif client["last_checker_status"] != 0:

2618

3324

logger.warning(

2619

"disabling client {0} - Client "

2620

"last checker failed with error code {1}"

2621

.format(client_name,

2622

client["last_checker_status"]))

3325

"disabling client {} - Client last"

3326

" checker failed with error code"

3327

" {}".format(

3328

client_name,

3329

client["last_checker_status"]))

2623

3330

client["enabled"] = False

2624

3331

else:

2625

client["expires"] = (datetime.datetime

2626

.utcnow()

2627

+ client["timeout"])

3332

client["expires"] = (

3333

datetime.datetime.utcnow()

3334

+ client["timeout"])

2628

3335

logger.debug("Last checker succeeded,"

2629

" keeping {0} enabled"

2630

.format(client_name))

3336

" keeping {} enabled".format(

3337

client_name))

2631

3338

try:

2632

client["secret"] = (

2633

pgp.decrypt(client["encrypted_secret"],

2634

client_settings[client_name]

2635

["secret"]))

3339

client["secret"] = pgp.decrypt(

3340

client["encrypted_secret"],

3341

client_settings[client_name]["secret"])

2636

3342

except PGPError:

2637

3343

# If decryption fails, we use secret from new settings

2638

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

2639

.format(client_name))

2640

client["secret"] = (

2641

client_settings[client_name]["secret"])

2642

3344

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

3345

client_name))

3346

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

3347

["secret"])

3348

2643

3349

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

2644

3350

for client_name in (set(old_client_settings)

2645

3351

- set(client_settings)):

2647

3353

for client_name in (set(client_settings)

2648

3354

- set(old_client_settings)):

2649

3355

clients_data[client_name] = client_settings[client_name]

2650

3356

2651

3357

# Create all client objects

2652

for client_name, client in clients_data.iteritems():

3358

for client_name, client in clients_data.items():

2653

3359

tcp_server.clients[client_name] = client_class(

2654

name = client_name, settings = client,

2655

server_settings = server_settings)

2656

3360

name=client_name,

3361

settings=client,

3362

server_settings=server_settings)

3363

2657

3364

if not tcp_server.clients:

2658

3365

logger.warning("No clients defined")

2659

3366

2660

3367

if not foreground:

2661

3368

if pidfile is not None:

3369

pid = os.getpid()

2662

3370

try:

2663

3371

with pidfile:

2664

pid = os.getpid()

2665

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

3372

print(pid, file=pidfile)

2666

3373

except IOError:

2667

3374

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

2668

3375

pidfilename, pid)

2669

3376

del pidfile

2670

3377

del pidfilename

2671

2672

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

2673

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

2674

3378

3379

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

3380

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3381

lambda: main_loop.quit() and False)

3382

2675

3383

if use_dbus:

2676

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

2677

"se.bsnet.fukt.Mandos"})

2678

class MandosDBusService(DBusObjectWithProperties):

3384

3385

@alternate_dbus_interfaces(

3386

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

3387

class MandosDBusService(DBusObjectWithObjectManager):

2679

3388

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

3389

2680

3390

def __init__(self):

2681

3391

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

3392

2682

3393

_interface = "se.recompile.Mandos"

2683

2684

@dbus_interface_annotations(_interface)

2685

def _foo(self):

2686

return { "org.freedesktop.DBus.Property"

2687

".EmitsChangedSignal":

2688

"false"}

2689

3394

2690

3395

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

2691

3396

def ClientAdded(self, objpath):

2692

3397

"D-Bus signal"

2693

3398

pass

2694

3399

2695

3400

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

2696

def ClientNotFound(self, fingerprint, address):

3401

def ClientNotFound(self, key_id, address):

2697

3402

"D-Bus signal"

2698

3403

pass

2699

3404

3405

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

3406

"true"})

2700

3407

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

2701

3408

def ClientRemoved(self, objpath, name):

2702

3409

"D-Bus signal"

2703

3410

pass

2704

3411

3412

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

3413

"true"})

2705

3414

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

2706

3415

def GetAllClients(self):

2707

3416

"D-Bus method"

2708

return dbus.Array(c.dbus_object_path

2709

for c in

2710

tcp_server.clients.itervalues())

2711

3417

return dbus.Array(c.dbus_object_path for c in

3418

tcp_server.clients.values())

3419

3420

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

3421

"true"})

2712

3422

@dbus.service.method(_interface,

2713

3423

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

2714

3424

def GetAllClientsWithProperties(self):

2715

3425

"D-Bus method"

2716

3426

return dbus.Dictionary(

2717

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

2718

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

3427

{c.dbus_object_path: c.GetAll(

3428

"se.recompile.Mandos.Client")

3429

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

2719

3430

signature="oa{sv}")

2720

3431

2721

3432

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

2722

3433

def RemoveClient(self, object_path):

2723

3434

"D-Bus method"

2724

for c in tcp_server.clients.itervalues():

3435

for c in tcp_server.clients.values():

2725

3436

if c.dbus_object_path == object_path:

2726

3437

del tcp_server.clients[c.name]

2727

3438

c.remove_from_connection()

2728

# Don't signal anything except ClientRemoved

3439

# Don't signal the disabling

2729

3440

c.disable(quiet=True)

2730

# Emit D-Bus signal

2731

self.ClientRemoved(object_path, c.name)

3441

# Emit D-Bus signal for removal

3442

self.client_removed_signal(c)

2732

3443

return

2733

3444

raise KeyError(object_path)

2734

3445

2735

3446

del _interface

2736

3447

3448

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3449

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

3450

def GetManagedObjects(self):

3451

"""D-Bus method"""

3452

return dbus.Dictionary(

3453

{client.dbus_object_path:

3454

dbus.Dictionary(

3455

{interface: client.GetAll(interface)

3456

for interface in

3457

client._get_all_interface_names()})

3458

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

3459

3460

def client_added_signal(self, client):

3461

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

3462

if use_dbus:

3463

# New standard signal

3464

self.InterfacesAdded(

3465

client.dbus_object_path,

3466

dbus.Dictionary(

3467

{interface: client.GetAll(interface)

3468

for interface in

3469

client._get_all_interface_names()}))

3470

# Old signal

3471

self.ClientAdded(client.dbus_object_path)

3472

3473

def client_removed_signal(self, client):

3474

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

3475

if use_dbus:

3476

# New standard signal

3477

self.InterfacesRemoved(

3478

client.dbus_object_path,

3479

client._get_all_interface_names())

3480

# Old signal

3481

self.ClientRemoved(client.dbus_object_path,

3482

client.name)

3483

2737

3484

mandos_dbus_service = MandosDBusService()

2738

3485

3486

# Save modules to variables to exempt the modules from being

3487

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

3488

mp = multiprocessing

3489

wn = wnull

3490

2739

3491

def cleanup():

2740

3492

"Cleanup function; run on exit"

2741

service.cleanup()

2742

2743

multiprocessing.active_children()

2744

wnull.close()

3493

if zeroconf:

3494

service.cleanup()

3495

3496

mp.active_children()

3497

wn.close()

2745

3498

if not (tcp_server.clients or client_settings):

2746

3499

return

2747

3500

2748

3501

# Store client before exiting. Secrets are encrypted with key

2749

3502

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

2750

3503

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

2751

3504

clients = {}

2752

3505

with PGPEngine() as pgp:

2753

for client in tcp_server.clients.itervalues():

3506

for client in tcp_server.clients.values():

2754

3507

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

2755

3508

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

2756

3509

key)

2757

3510

client_dict = {}

2758

3511

2759

3512

# A list of attributes that can not be pickled

2760

3513

# + secret.

2761

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

2762

"checker", "server_settings"))

2763

for name, typ in (inspect.getmembers

2764

(dbus.service.Object)):

3514

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

3515

"checker", "server_settings"}

3516

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

3517

.Object):

2765

3518

exclude.add(name)

2766

3519

2767

3520

client_dict["encrypted_secret"] = (client

2768

3521

.encrypted_secret)

2769

3522

for attr in client.client_structure:

2770

3523

if attr not in exclude:

2771

3524

client_dict[attr] = getattr(client, attr)

2772

3525

2773

3526

clients[client.name] = client_dict

2774

3527

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

2775

3528

2776

3529

try:

2777

with (tempfile.NamedTemporaryFile

2778

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

2779

dir=os.path.dirname(stored_state_path),

2780

delete=False)) as stored_state:

2781

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

2782

tempname=stored_state.name

3530

with tempfile.NamedTemporaryFile(

3531

mode='wb',

3532

suffix=".pickle",

3533

prefix='clients-',

3534

dir=os.path.dirname(stored_state_path),

3535

delete=False) as stored_state:

3536

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

3537

protocol=2)

3538

tempname = stored_state.name

2783

3539

os.rename(tempname, stored_state_path)

2784

3540

except (IOError, OSError) as e:

2785

3541

if not debug:

2788

3544

except NameError:

2789

3545

pass

2790

3546

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

2791

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

3547

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

2792

3548

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

2793

3549

else:

2794

3550

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

2795

3551

exc_info=e)

2796

3552

raise

2797

3553

2798

3554

# Delete all clients, and settings from config

2799

3555

while tcp_server.clients:

2800

3556

name, client = tcp_server.clients.popitem()

2801

3557

if use_dbus:

2802

3558

client.remove_from_connection()

2803

# Don't signal anything except ClientRemoved

3559

# Don't signal the disabling

2804

3560

client.disable(quiet=True)

3561

# Emit D-Bus signal for removal

2805

3562

if use_dbus:

2806

# Emit D-Bus signal

2807

mandos_dbus_service.ClientRemoved(client

2808

.dbus_object_path,

2809

client.name)

3563

mandos_dbus_service.client_removed_signal(client)

2810

3564

client_settings.clear()

2811

3565

2812

3566

atexit.register(cleanup)

2813

2814

for client in tcp_server.clients.itervalues():

3567

3568

for client in tcp_server.clients.values():

2815

3569

if use_dbus:

2816

# Emit D-Bus signal

2817

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3570

# Emit D-Bus signal for adding

3571

mandos_dbus_service.client_added_signal(client)

2818

3572

# Need to initiate checking of clients

2819

3573

if client.enabled:

2820

3574

client.init_checker()

2821

3575

2822

3576

tcp_server.enable()

2823

3577

tcp_server.server_activate()

2824

3578

2825

3579

# Find out what port we got

2826

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

3580

if zeroconf:

3581

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

2827

3582

if use_ipv6:

2828

3583

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

2829

3584

" flowinfo %d, scope_id %d",

2831

3586

else: # IPv4

2832

3587

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

2833

3588

*tcp_server.socket.getsockname())

2834

2835

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

2836

3589

3590

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

3591

2837

3592

try:

2838

# From the Avahi example code

2839

try:

2840

service.activate()

2841

except dbus.exceptions.DBusException as error:

2842

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

2843

cleanup()

2844

sys.exit(1)

2845

# End of Avahi example code

2846

2847

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

2848

lambda *args, **kwargs:

2849

(tcp_server.handle_request

2850

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

2851

3593

if zeroconf:

3594

# From the Avahi example code

3595

try:

3596

service.activate()

3597

except dbus.exceptions.DBusException as error:

3598

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

3599

cleanup()

3600

sys.exit(1)

3601

# End of Avahi example code

3602

3603

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

3604

lambda *args, **kwargs:

3605

(tcp_server.handle_request

3606

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

3607

2852

3608

logger.debug("Starting main loop")

2853

3609

main_loop.run()

2854

3610

except AvahiError as error:

2863

3619

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

2864

3620

cleanup()

2865

3621

3622

2866

3623

if __name__ == '__main__':

2867

3624

main()