/mandos/release : revision 237.7.502

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#!/usr/bin/python2.7

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#!/usr/bin/python

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

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#

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#

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

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#

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#

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

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# service publisher, downloaded from

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

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

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

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

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#

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#

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# Everything else is

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#

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

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

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#

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# This file is part of Mandos.

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#

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

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

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

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# (at your option) any later version.

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#

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

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

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

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# WITHOUT ANY WARRANTY; without even the implied warranty of

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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# GNU General Public License for more details.

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#

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#

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

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# along with this program. If not, see

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

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#

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

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#

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

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#

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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try:

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from future_builtins import *

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except ImportError:

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pass

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import SocketServer as socketserver

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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import cPickle as pickle

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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import gobject

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import avahi

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from gi.repository import GLib

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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# 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 = "1.6.7"

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

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# Try running the C preprocessor:

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try:

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

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"/dev/stdin"],

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE)

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stdout = cc.communicate(

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

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

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except (OSError, ValueError, IndexError):

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# No value found

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.7.19"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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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 =

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logging.handlers.SysLogHandler.LOG_DAEMON,

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

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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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181

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class PGPEngine(object):

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

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def __init__(self):

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

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--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.

182

236

.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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245

passfile.flush()

192

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,

252

stderr=subprocess.PIPE)

253

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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257

204

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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:

260

with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

208

262

passfile.write(passphrase)

209

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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,

215

stdout = subprocess.PIPE,

216

stderr = subprocess.PIPE)

217

decrypted_plaintext, err = proc.communicate(input

218

= data)

268

stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

271

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

219

272

if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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# Pretend that we have an Avahi module

278

class Avahi(object):

279

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

280

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

281

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

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

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

287

DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

288

DBUS_PATH_SERVER = "/"

289

290

def string_array_to_txt_array(self, t):

291

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

292

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

293

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

296

SERVER_INVALID = 0 # avahi-common/defs.h

297

SERVER_REGISTERING = 1 # avahi-common/defs.h

298

SERVER_RUNNING = 2 # avahi-common/defs.h

299

SERVER_COLLISION = 3 # avahi-common/defs.h

300

SERVER_FAILURE = 4 # avahi-common/defs.h

301

avahi = Avahi()

302

303

224

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class AvahiError(Exception):

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

226

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self.value = value

227

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

228

def __unicode__(self):

229

return unicode(repr(self.value))

307

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

308

**kwargs)

309

230

310

231

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class AvahiServiceError(AvahiError):

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pass

233

313

314

234

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class AvahiGroupError(AvahiError):

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pass

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318

238

319

class AvahiService(object):

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320

"""An Avahi (Zeroconf) service.

240

321

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Attributes:

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323

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

243

324

Used to optionally bind to the specified interface.

255

336

server: D-Bus Server

256

337

bus: dbus.SystemBus()

257

338

"""

258

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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,

262

protocol = avahi.PROTO_UNSPEC, bus = None):

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340

def __init__(self,

341

interface=avahi.IF_UNSPEC,

342

name=None,

343

servicetype=None,

344

port=None,

345

TXT=None,

346

domain="",

347

host="",

348

max_renames=32768,

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protocol=avahi.PROTO_UNSPEC,

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bus=None):

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self.interface = interface

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352

self.name = name

265

353

self.type = servicetype

274

362

self.server = None

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self.bus = bus

276

364

self.entry_group_state_changed_match = None

277

278

def rename(self):

365

366

def rename(self, remove=True):

279

367

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

280

368

if self.rename_count >= self.max_renames:

281

369

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

282

370

" after %i retries, exiting.",

283

371

self.rename_count)

284

372

raise AvahiServiceError("Too many renames")

285

self.name = unicode(self.server

286

.GetAlternativeServiceName(self.name))

373

self.name = str(

374

self.server.GetAlternativeServiceName(self.name))

375

self.rename_count += 1

287

376

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

288

377

self.name)

289

self.remove()

378

if remove:

379

self.remove()

290

380

try:

291

381

self.add()

292

382

except dbus.exceptions.DBusException as error:

293

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

294

self.cleanup()

295

os._exit(1)

296

self.rename_count += 1

297

383

if (error.get_dbus_name()

384

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

385

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

386

return self.rename(remove=False)

387

else:

388

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

389

self.cleanup()

390

os._exit(1)

391

298

392

def remove(self):

299

393

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

300

394

if self.entry_group_state_changed_match is not None:

302

396

self.entry_group_state_changed_match = None

303

397

if self.group is not None:

304

398

self.group.Reset()

305

399

306

400

def add(self):

307

401

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

308

402

self.remove()

325

419

dbus.UInt16(self.port),

326

420

avahi.string_array_to_txt_array(self.TXT))

327

421

self.group.Commit()

328

422

329

423

def entry_group_state_changed(self, state, error):

330

424

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

331

425

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

332

426

333

427

if state == avahi.ENTRY_GROUP_ESTABLISHED:

334

428

logger.debug("Zeroconf service established.")

335

429

elif state == avahi.ENTRY_GROUP_COLLISION:

337

431

self.rename()

338

432

elif state == avahi.ENTRY_GROUP_FAILURE:

339

433

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

340

unicode(error))

341

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

342

.format(error))

343

434

str(error))

435

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

436

344

437

def cleanup(self):

345

438

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

346

439

if self.group is not None:

351

444

pass

352

445

self.group = None

353

446

self.remove()

354

447

355

448

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

356

449

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

357

450

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

358

bad_states = { avahi.SERVER_INVALID:

359

"Zeroconf server invalid",

360

avahi.SERVER_REGISTERING: None,

361

avahi.SERVER_COLLISION:

362

"Zeroconf server name collision",

363

avahi.SERVER_FAILURE:

364

"Zeroconf server failure" }

451

bad_states = {

452

avahi.SERVER_INVALID: "Zeroconf server invalid",

453

avahi.SERVER_REGISTERING: None,

454

avahi.SERVER_COLLISION: "Zeroconf server name collision",

455

avahi.SERVER_FAILURE: "Zeroconf server failure",

456

}

365

457

if state in bad_states:

366

458

if bad_states[state] is not None:

367

459

if error is None:

370

462

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

371

463

self.cleanup()

372

464

elif state == avahi.SERVER_RUNNING:

373

self.add()

465

try:

466

self.add()

467

except dbus.exceptions.DBusException as error:

468

if (error.get_dbus_name()

469

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

470

logger.info("Local Zeroconf service name"

471

" collision.")

472

return self.rename(remove=False)

473

else:

474

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

475

self.cleanup()

476

os._exit(1)

374

477

else:

375

478

if error is None:

376

479

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

377

480

else:

378

481

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

379

482

380

483

def activate(self):

381

484

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

382

485

if self.server is None:

386

489

follow_name_owner_changes=True),

387

490

avahi.DBUS_INTERFACE_SERVER)

388

491

self.server.connect_to_signal("StateChanged",

389

self.server_state_changed)

492

self.server_state_changed)

390

493

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

391

494

392

495

393

496

class AvahiServiceToSyslog(AvahiService):

394

def rename(self):

497

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

395

498

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

396

ret = AvahiService.rename(self)

397

syslogger.setFormatter(logging.Formatter

398

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

399

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

400

.format(self.name)))

499

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

500

syslogger.setFormatter(logging.Formatter(

501

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

502

.format(self.name)))

401

503

return ret

402

504

403

505

506

# Pretend that we have a GnuTLS module

507

class GnuTLS(object):

508

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

509

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

510

511

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

512

if library is None:

513

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

514

_library = ctypes.cdll.LoadLibrary(library)

515

del library

516

_need_version = b"3.3.0"

517

518

def __init__(self):

519

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

520

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

521

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

522

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

523

.format(self._need_version))

524

525

# Unless otherwise indicated, the constants and types below are

526

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

527

528

# Constants

529

E_SUCCESS = 0

530

E_INTERRUPTED = -52

531

E_AGAIN = -28

532

CRT_OPENPGP = 2

533

CLIENT = 2

534

SHUT_RDWR = 0

535

CRD_CERTIFICATE = 1

536

E_NO_CERTIFICATE_FOUND = -49

537

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

538

539

# Types

540

class session_int(ctypes.Structure):

541

_fields_ = []

542

session_t = ctypes.POINTER(session_int)

543

544

class certificate_credentials_st(ctypes.Structure):

545

_fields_ = []

546

certificate_credentials_t = ctypes.POINTER(

547

certificate_credentials_st)

548

certificate_type_t = ctypes.c_int

549

550

class datum_t(ctypes.Structure):

551

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

552

('size', ctypes.c_uint)]

553

554

class openpgp_crt_int(ctypes.Structure):

555

_fields_ = []

556

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

557

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

558

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

559

credentials_type_t = ctypes.c_int

560

transport_ptr_t = ctypes.c_void_p

561

close_request_t = ctypes.c_int

562

563

# Exceptions

564

class Error(Exception):

565

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

566

# exception might be raised from within GnuTLS.__init__,

567

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

568

# global variable has happened.

569

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

570

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

571

# code is passed, convert it to a string with

572

# gnutls.strerror()

573

self.code = code

574

if message is None and code is not None:

575

message = GnuTLS.strerror(code)

576

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

577

message, *args)

578

579

class CertificateSecurityError(Error):

580

pass

581

582

# Classes

583

class Credentials(object):

584

def __init__(self):

585

self._c_object = gnutls.certificate_credentials_t()

586

gnutls.certificate_allocate_credentials(

587

ctypes.byref(self._c_object))

588

self.type = gnutls.CRD_CERTIFICATE

589

590

def __del__(self):

591

gnutls.certificate_free_credentials(self._c_object)

592

593

class ClientSession(object):

594

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

595

self._c_object = gnutls.session_t()

596

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

597

gnutls.set_default_priority(self._c_object)

598

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

599

gnutls.handshake_set_private_extensions(self._c_object,

600

True)

601

self.socket = socket

602

if credentials is None:

603

credentials = gnutls.Credentials()

604

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

605

ctypes.cast(credentials._c_object,

606

ctypes.c_void_p))

607

self.credentials = credentials

608

609

def __del__(self):

610

gnutls.deinit(self._c_object)

611

612

def handshake(self):

613

return gnutls.handshake(self._c_object)

614

615

def send(self, data):

616

data = bytes(data)

617

data_len = len(data)

618

while data_len > 0:

619

data_len -= gnutls.record_send(self._c_object,

620

data[-data_len:],

621

data_len)

622

623

def bye(self):

624

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

625

626

# Error handling functions

627

def _error_code(result):

628

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

629

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

630

if result >= 0:

631

return result

632

if result == gnutls.E_NO_CERTIFICATE_FOUND:

633

raise gnutls.CertificateSecurityError(code=result)

634

raise gnutls.Error(code=result)

635

636

def _retry_on_error(result, func, arguments):

637

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

638

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

639

while result < 0:

640

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

641

return _error_code(result)

642

result = func(*arguments)

643

return result

644

645

# Unless otherwise indicated, the function declarations below are

646

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

647

648

# Functions

649

priority_set_direct = _library.gnutls_priority_set_direct

650

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

651

ctypes.POINTER(ctypes.c_char_p)]

652

priority_set_direct.restype = _error_code

653

654

init = _library.gnutls_init

655

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

656

init.restype = _error_code

657

658

set_default_priority = _library.gnutls_set_default_priority

659

set_default_priority.argtypes = [session_t]

660

set_default_priority.restype = _error_code

661

662

record_send = _library.gnutls_record_send

663

record_send.argtypes = [session_t, ctypes.c_void_p,

664

ctypes.c_size_t]

665

record_send.restype = ctypes.c_ssize_t

666

record_send.errcheck = _retry_on_error

667

668

certificate_allocate_credentials = (

669

_library.gnutls_certificate_allocate_credentials)

670

certificate_allocate_credentials.argtypes = [

671

ctypes.POINTER(certificate_credentials_t)]

672

certificate_allocate_credentials.restype = _error_code

673

674

certificate_free_credentials = (

675

_library.gnutls_certificate_free_credentials)

676

certificate_free_credentials.argtypes = [

677

certificate_credentials_t]

678

certificate_free_credentials.restype = None

679

680

handshake_set_private_extensions = (

681

_library.gnutls_handshake_set_private_extensions)

682

handshake_set_private_extensions.argtypes = [session_t,

683

ctypes.c_int]

684

handshake_set_private_extensions.restype = None

685

686

credentials_set = _library.gnutls_credentials_set

687

credentials_set.argtypes = [session_t, credentials_type_t,

688

ctypes.c_void_p]

689

credentials_set.restype = _error_code

690

691

strerror = _library.gnutls_strerror

692

strerror.argtypes = [ctypes.c_int]

693

strerror.restype = ctypes.c_char_p

694

695

certificate_type_get = _library.gnutls_certificate_type_get

696

certificate_type_get.argtypes = [session_t]

697

certificate_type_get.restype = _error_code

698

699

certificate_get_peers = _library.gnutls_certificate_get_peers

700

certificate_get_peers.argtypes = [session_t,

701

ctypes.POINTER(ctypes.c_uint)]

702

certificate_get_peers.restype = ctypes.POINTER(datum_t)

703

704

global_set_log_level = _library.gnutls_global_set_log_level

705

global_set_log_level.argtypes = [ctypes.c_int]

706

global_set_log_level.restype = None

707

708

global_set_log_function = _library.gnutls_global_set_log_function

709

global_set_log_function.argtypes = [log_func]

710

global_set_log_function.restype = None

711

712

deinit = _library.gnutls_deinit

713

deinit.argtypes = [session_t]

714

deinit.restype = None

715

716

handshake = _library.gnutls_handshake

717

handshake.argtypes = [session_t]

718

handshake.restype = _error_code

719

handshake.errcheck = _retry_on_error

720

721

transport_set_ptr = _library.gnutls_transport_set_ptr

722

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

723

transport_set_ptr.restype = None

724

725

bye = _library.gnutls_bye

726

bye.argtypes = [session_t, close_request_t]

727

bye.restype = _error_code

728

bye.errcheck = _retry_on_error

729

730

check_version = _library.gnutls_check_version

731

check_version.argtypes = [ctypes.c_char_p]

732

check_version.restype = ctypes.c_char_p

733

734

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

735

736

openpgp_crt_init = _library.gnutls_openpgp_crt_init

737

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

738

openpgp_crt_init.restype = _error_code

739

740

openpgp_crt_import = _library.gnutls_openpgp_crt_import

741

openpgp_crt_import.argtypes = [openpgp_crt_t,

742

ctypes.POINTER(datum_t),

743

openpgp_crt_fmt_t]

744

openpgp_crt_import.restype = _error_code

745

746

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

747

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

748

ctypes.POINTER(ctypes.c_uint)]

749

openpgp_crt_verify_self.restype = _error_code

750

751

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

752

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

753

openpgp_crt_deinit.restype = None

754

755

openpgp_crt_get_fingerprint = (

756

_library.gnutls_openpgp_crt_get_fingerprint)

757

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

758

ctypes.c_void_p,

759

ctypes.POINTER(

760

ctypes.c_size_t)]

761

openpgp_crt_get_fingerprint.restype = _error_code

762

763

# Remove non-public functions

764

del _error_code, _retry_on_error

765

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

766

gnutls = GnuTLS()

767

768

769

def call_pipe(connection, # : multiprocessing.Connection

770

func, *args, **kwargs):

771

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

772

773

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

774

return value on the provided multiprocessing.Connection.

775

"""

776

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

777

connection.close()

778

779

404

780

class Client(object):

405

781

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

406

782

407

783

Attributes:

408

784

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

409

785

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

411

787

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

412

788

to see if the client lives.

413

789

'None' if no process is running.

414

checker_callback_tag: a gobject event source tag, or None

790

checker_callback_tag: a GLib event source tag, or None

415

791

checker_command: string; External command which is run to check

416

792

if client lives. %() expansions are done at

417

793

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

418

794

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

419

checker_initiator_tag: a gobject event source tag, or None

795

checker_initiator_tag: a GLib event source tag, or None

420

796

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

421

797

client_structure: Object describing what attributes a client has

422

798

and is used for storing the client at exit

423

799

current_checker_command: string; current running checker_command

424

disable_initiator_tag: a gobject event source tag, or None

800

disable_initiator_tag: a GLib event source tag, or None

425

801

enabled: bool()

426

802

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

427

803

uniquely identify the client

432

808

last_checker_status: integer between 0 and 255 reflecting exit

433

809

status of last checker. -1 reflects crashed

434

810

checker, -2 means no checker completed yet.

811

last_checker_signal: The signal which killed the last checker, if

812

last_checker_status is -1

435

813

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

436

814

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

437

815

D-Bus identifiers

444

822

disabled, or None

445

823

server_settings: The server_settings dict from main()

446

824

"""

447

825

448

826

runtime_expansions = ("approval_delay", "approval_duration",

449

827

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

450

828

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

451

829

"last_approval_request", "last_checked_ok",

452

830

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

453

client_defaults = { "timeout": "PT5M",

454

"extended_timeout": "PT15M",

455

"interval": "PT2M",

456

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

457

"host": "",

458

"approval_delay": "PT0S",

459

"approval_duration": "PT1S",

460

"approved_by_default": "True",

461

"enabled": "True",

462

}

463

831

client_defaults = {

832

"timeout": "PT5M",

833

"extended_timeout": "PT15M",

834

"interval": "PT2M",

835

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

836

"host": "",

837

"approval_delay": "PT0S",

838

"approval_duration": "PT1S",

839

"approved_by_default": "True",

840

"enabled": "True",

841

}

842

464

843

@staticmethod

465

844

def config_parser(config):

466

845

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

473

852

for client_name in config.sections():

474

853

section = dict(config.items(client_name))

475

854

client = settings[client_name] = {}

476

855

477

856

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

478

857

# Reformat values from string types to Python types

479

858

client["approved_by_default"] = config.getboolean(

480

859

client_name, "approved_by_default")

481

860

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

482

861

"enabled")

483

862

863

# Uppercase and remove spaces from fingerprint for later

864

# comparison purposes with return value from the

865

# fingerprint() function

484

866

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

485

867

.replace(" ", ""))

486

868

if "secret" in section:

487

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

869

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

870

.encode("utf-8"),

871

"base64")

488

872

elif "secfile" in section:

489

873

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

490

874

(section["secfile"])),

505

889

client["last_approval_request"] = None

506

890

client["last_checked_ok"] = None

507

891

client["last_checker_status"] = -2

508

892

509

893

return settings

510

511

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

894

895

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

512

896

self.name = name

513

897

if server_settings is None:

514

898

server_settings = {}

516

900

# adding all client settings

517

901

for setting, value in settings.items():

518

902

setattr(self, setting, value)

519

903

520

904

if self.enabled:

521

905

if not hasattr(self, "last_enabled"):

522

906

self.last_enabled = datetime.datetime.utcnow()

526

910

else:

527

911

self.last_enabled = None

528

912

self.expires = None

529

913

530

914

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

531

# Uppercase and remove spaces from fingerprint for later

532

# comparison purposes with return value from the fingerprint()

533

# function

534

915

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

535

916

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

536

917

datetime.datetime.utcnow())

537

918

538

919

# attributes specific for this server instance

539

920

self.checker = None

540

921

self.checker_initiator_tag = None

543

924

self.current_checker_command = None

544

925

self.approved = None

545

926

self.approvals_pending = 0

546

self.changedstate = (multiprocessing_manager

547

.Condition(multiprocessing_manager

548

.Lock()))

549

self.client_structure = [attr for attr in

550

self.__dict__.iterkeys()

927

self.changedstate = multiprocessing_manager.Condition(

928

multiprocessing_manager.Lock())

929

self.client_structure = [attr

930

for attr in self.__dict__.keys()

551

931

if not attr.startswith("_")]

552

932

self.client_structure.append("client_structure")

553

554

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

555

lambda obj:

556

isinstance(obj,

557

property)):

933

934

for name, t in inspect.getmembers(

935

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

558

936

if not name.startswith("_"):

559

937

self.client_structure.append(name)

560

938

561

939

# Send notice to process children that client state has changed

562

940

def send_changedstate(self):

563

941

with self.changedstate:

564

942

self.changedstate.notify_all()

565

943

566

944

def enable(self):

567

945

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

568

946

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

573

951

self.last_enabled = datetime.datetime.utcnow()

574

952

self.init_checker()

575

953

self.send_changedstate()

576

954

577

955

def disable(self, quiet=True):

578

956

"""Disable this client."""

579

957

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

581

959

if not quiet:

582

960

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

583

961

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

584

gobject.source_remove(self.disable_initiator_tag)

962

GLib.source_remove(self.disable_initiator_tag)

585

963

self.disable_initiator_tag = None

586

964

self.expires = None

587

965

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

588

gobject.source_remove(self.checker_initiator_tag)

966

GLib.source_remove(self.checker_initiator_tag)

589

967

self.checker_initiator_tag = None

590

968

self.stop_checker()

591

969

self.enabled = False

592

970

if not quiet:

593

971

self.send_changedstate()

594

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

972

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

595

973

return False

596

974

597

975

def __del__(self):

598

976

self.disable()

599

977

600

978

def init_checker(self):

601

979

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

602

980

# and every interval from then on.

603

981

if self.checker_initiator_tag is not None:

604

gobject.source_remove(self.checker_initiator_tag)

605

self.checker_initiator_tag = (gobject.timeout_add

606

(int(self.interval

607

.total_seconds() * 1000),

608

self.start_checker))

982

GLib.source_remove(self.checker_initiator_tag)

983

self.checker_initiator_tag = GLib.timeout_add(

984

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

985

self.start_checker)

609

986

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

610

987

if self.disable_initiator_tag is not None:

611

gobject.source_remove(self.disable_initiator_tag)

612

self.disable_initiator_tag = (gobject.timeout_add

613

(int(self.timeout

614

.total_seconds() * 1000),

615

self.disable))

988

GLib.source_remove(self.disable_initiator_tag)

989

self.disable_initiator_tag = GLib.timeout_add(

990

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

616

991

# Also start a new checker *right now*.

617

992

self.start_checker()

618

619

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

993

994

def checker_callback(self, source, condition, connection,

995

command):

620

996

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

621

997

self.checker_callback_tag = None

622

998

self.checker = None

623

if os.WIFEXITED(condition):

624

self.last_checker_status = os.WEXITSTATUS(condition)

999

# Read return code from connection (see call_pipe)

1000

returncode = connection.recv()

1001

connection.close()

1002

1003

if returncode >= 0:

1004

self.last_checker_status = returncode

1005

self.last_checker_signal = None

625

1006

if self.last_checker_status == 0:

626

1007

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

627

1008

vars(self))

628

1009

self.checked_ok()

629

1010

else:

630

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

631

vars(self))

1011

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

632

1012

else:

633

1013

self.last_checker_status = -1

1014

self.last_checker_signal = -returncode

634

1015

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

635

1016

vars(self))

636

1017

return False

1018

637

1019

def checked_ok(self):

638

1020

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

639

1021

self.last_checked_ok = datetime.datetime.utcnow()

640

1022

self.last_checker_status = 0

1023

self.last_checker_signal = None

641

1024

self.bump_timeout()

642

1025

643

1026

def bump_timeout(self, timeout=None):

644

1027

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

645

1028

if timeout is None:

646

1029

timeout = self.timeout

647

1030

if self.disable_initiator_tag is not None:

648

gobject.source_remove(self.disable_initiator_tag)

1031

GLib.source_remove(self.disable_initiator_tag)

649

1032

self.disable_initiator_tag = None

650

1033

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

651

self.disable_initiator_tag = (gobject.timeout_add

652

(int(timeout.total_seconds()

653

* 1000), self.disable))

1034

self.disable_initiator_tag = GLib.timeout_add(

1035

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

654

1036

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

655

1037

656

1038

def need_approval(self):

657

1039

self.last_approval_request = datetime.datetime.utcnow()

658

1040

659

1041

def start_checker(self):

660

1042

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

661

1043

662

1044

If a checker already exists, leave it running and do

663

1045

nothing."""

664

1046

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

669

1051

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

670

1052

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

671

1053

# should be.

672

673

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

674

try:

675

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

676

except AttributeError:

677

pass

678

except OSError as error:

679

if error.errno != errno.ECHILD:

680

raise

681

else:

682

if pid:

683

logger.warning("Checker was a zombie")

684

gobject.source_remove(self.checker_callback_tag)

685

self.checker_callback(pid, status,

686

self.current_checker_command)

1054

1055

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

1056

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

1057

self.checker.join()

1058

self.checker = None

687

1059

# Start a new checker if needed

688

1060

if self.checker is None:

689

1061

# Escape attributes for the shell

690

escaped_attrs = { attr:

691

re.escape(unicode(getattr(self,

692

attr)))

693

for attr in self.runtime_expansions }

1062

escaped_attrs = {

1063

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

1064

for attr in self.runtime_expansions}

694

1065

try:

695

1066

command = self.checker_command % escaped_attrs

696

1067

except TypeError as error:

697

1068

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

698

self.checker_command, exc_info=error)

699

return True # Try again later

1069

self.checker_command,

1070

exc_info=error)

1071

return True # Try again later

700

1072

self.current_checker_command = command

701

try:

702

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

703

command, self.name)

704

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

705

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

706

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

707

# always replaced by /dev/null.)

708

# The exception is when not debugging but nevertheless

709

# running in the foreground; use the previously

710

# created wnull.

711

popen_args = {}

712

if (not self.server_settings["debug"]

713

and self.server_settings["foreground"]):

714

popen_args.update({"stdout": wnull,

715

"stderr": wnull })

716

self.checker = subprocess.Popen(command,

717

close_fds=True,

718

shell=True, cwd="/",

719

**popen_args)

720

except OSError as error:

721

logger.error("Failed to start subprocess",

722

exc_info=error)

723

return True

724

self.checker_callback_tag = (gobject.child_watch_add

725

(self.checker.pid,

726

self.checker_callback,

727

data=command))

728

# The checker may have completed before the gobject

729

# watch was added. Check for this.

730

try:

731

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

732

except OSError as error:

733

if error.errno == errno.ECHILD:

734

# This should never happen

735

logger.error("Child process vanished",

736

exc_info=error)

737

return True

738

raise

739

if pid:

740

gobject.source_remove(self.checker_callback_tag)

741

self.checker_callback(pid, status, command)

742

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

1073

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

1074

self.name)

1075

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

1076

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

1077

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

1078

# always replaced by /dev/null.)

1079

# The exception is when not debugging but nevertheless

1080

# running in the foreground; use the previously

1081

# created wnull.

1082

popen_args = {"close_fds": True,

1083

"shell": True,

1084

"cwd": "/"}

1085

if (not self.server_settings["debug"]

1086

and self.server_settings["foreground"]):

1087

popen_args.update({"stdout": wnull,

1088

"stderr": wnull})

1089

pipe = multiprocessing.Pipe(duplex=False)

1090

self.checker = multiprocessing.Process(

1091

target=call_pipe,

1092

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

1093

kwargs=popen_args)

1094

self.checker.start()

1095

self.checker_callback_tag = GLib.io_add_watch(

1096

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

1097

self.checker_callback, pipe[0], command)

1098

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

743

1099

return True

744

1100

745

1101

def stop_checker(self):

746

1102

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

747

1103

if self.checker_callback_tag:

748

gobject.source_remove(self.checker_callback_tag)

1104

GLib.source_remove(self.checker_callback_tag)

749

1105

self.checker_callback_tag = None

750

1106

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

751

1107

return

752

1108

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

753

try:

754

self.checker.terminate()

755

#time.sleep(0.5)

756

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

757

# self.checker.kill()

758

except OSError as error:

759

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

760

raise

1109

self.checker.terminate()

761

1110

self.checker = None

762

1111

763

1112

764

def dbus_service_property(dbus_interface, signature="v",

765

access="readwrite", byte_arrays=False):

1113

def dbus_service_property(dbus_interface,

1114

signature="v",

1115

access="readwrite",

1116

byte_arrays=False):

766

1117

"""Decorators for marking methods of a DBusObjectWithProperties to

767

1118

become properties on the D-Bus.

768

1119

769

1120

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

770

1121

and with one argument by "Set".

771

1122

772

1123

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

773

1124

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

774

1125

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

778

1129

if byte_arrays and signature != "ay":

779

1130

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

780

1131

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

1132

781

1133

def decorator(func):

782

1134

func._dbus_is_property = True

783

1135

func._dbus_interface = dbus_interface

786

1138

func._dbus_name = func.__name__

787

1139

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

788

1140

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

789

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1141

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

790

1142

return func

1143

791

1144

return decorator

792

1145

793

1146

794

1147

def dbus_interface_annotations(dbus_interface):

795

1148

"""Decorator for marking functions returning interface annotations

796

1149

797

1150

Usage:

798

1151

799

1152

@dbus_interface_annotations("org.example.Interface")

800

1153

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

801

1154

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

802

1155

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

803

1156

"false"}

804

1157

"""

1158

805

1159

def decorator(func):

806

1160

func._dbus_is_interface = True

807

1161

func._dbus_interface = dbus_interface

808

1162

func._dbus_name = dbus_interface

809

1163

return func

1164

810

1165

return decorator

811

1166

812

1167

813

1168

def dbus_annotations(annotations):

814

1169

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

815

1170

Usage:

816

1171

1172

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

1173

"org.freedesktop.DBus.Property."

1174

"EmitsChangedSignal": "false"})

817

1175

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

818

1176

access="r")

819

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

820

"org.freedesktop.DBus.Property."

821

"EmitsChangedSignal": "false"})

822

1177

def Property_dbus_property(self):

823

1178

return dbus.Boolean(False)

1179

1180

See also the DBusObjectWithAnnotations class.

824

1181

"""

1182

825

1183

def decorator(func):

826

1184

func._dbus_annotations = annotations

827

1185

return func

1186

828

1187

return decorator

829

1188

830

1189

831

1190

class DBusPropertyException(dbus.exceptions.DBusException):

832

1191

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

833

1192

"""

834

def __unicode__(self):

835

return unicode(str(self))

1193

pass

836

1194

837

1195

838

1196

class DBusPropertyAccessException(DBusPropertyException):

847

1205

pass

848

1206

849

1207

850

class DBusObjectWithProperties(dbus.service.Object):

851

"""A D-Bus object with properties.

852

853

Classes inheriting from this can use the dbus_service_property

854

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

855

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

1208

class DBusObjectWithAnnotations(dbus.service.Object):

1209

"""A D-Bus object with annotations.

1210

1211

Classes inheriting from this can use the dbus_annotations

1212

decorator to add annotations to methods or signals.

856

1213

"""

857

1214

858

1215

@staticmethod

859

1216

def _is_dbus_thing(thing):

860

1217

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

861

1218

862

1219

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

863

1220

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

864

1221

"""

865

1222

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

866

1223

False)

867

1224

868

1225

def _get_all_dbus_things(self, thing):

869

1226

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

870

1227

"""

871

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

872

name),

1228

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

873

1229

athing.__get__(self))

874

1230

for cls in self.__class__.__mro__

875

1231

for name, athing in

876

inspect.getmembers(cls,

877

self._is_dbus_thing(thing)))

878

1232

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

1233

1234

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1235

out_signature="s",

1236

path_keyword='object_path',

1237

connection_keyword='connection')

1238

def Introspect(self, object_path, connection):

1239

"""Overloading of standard D-Bus method.

1240

1241

Inserts annotation tags on methods and signals.

1242

"""

1243

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

1244

connection)

1245

try:

1246

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

1247

1248

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

1249

# Add annotation tags

1250

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

1251

for tag in if_tag.getElementsByTagName(typ):

1252

annots = dict()

1253

for name, prop in (self.

1254

_get_all_dbus_things(typ)):

1255

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

1256

and prop._dbus_interface

1257

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

1258

annots.update(getattr(

1259

prop, "_dbus_annotations", {}))

1260

for name, value in annots.items():

1261

ann_tag = document.createElement(

1262

"annotation")

1263

ann_tag.setAttribute("name", name)

1264

ann_tag.setAttribute("value", value)

1265

tag.appendChild(ann_tag)

1266

# Add interface annotation tags

1267

for annotation, value in dict(

1268

itertools.chain.from_iterable(

1269

annotations().items()

1270

for name, annotations

1271

in self._get_all_dbus_things("interface")

1272

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

1273

)).items():

1274

ann_tag = document.createElement("annotation")

1275

ann_tag.setAttribute("name", annotation)

1276

ann_tag.setAttribute("value", value)

1277

if_tag.appendChild(ann_tag)

1278

# Fix argument name for the Introspect method itself

1279

if (if_tag.getAttribute("name")

1280

== dbus.INTROSPECTABLE_IFACE):

1281

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

1282

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

1283

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

1284

if (arg.getAttribute("direction")

1285

== "out"):

1286

arg.setAttribute("name",

1287

"xml_data")

1288

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

1289

document.unlink()

1290

except (AttributeError, xml.dom.DOMException,

1291

xml.parsers.expat.ExpatError) as error:

1292

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

1293

exc_info=error)

1294

return xmlstring

1295

1296

1297

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1298

"""A D-Bus object with properties.

1299

1300

Classes inheriting from this can use the dbus_service_property

1301

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

1302

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

1303

"""

1304

879

1305

def _get_dbus_property(self, interface_name, property_name):

880

1306

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

881

1307

property with the specified name and interface.

882

1308

"""

883

for cls in self.__class__.__mro__:

884

for name, value in (inspect.getmembers

885

(cls,

886

self._is_dbus_thing("property"))):

1309

for cls in self.__class__.__mro__:

1310

for name, value in inspect.getmembers(

1311

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

887

1312

if (value._dbus_name == property_name

888

1313

and value._dbus_interface == interface_name):

889

1314

return value.__get__(self)

890

1315

891

1316

# No such property

892

raise DBusPropertyNotFound(self.dbus_object_path + ":"

893

+ interface_name + "."

894

+ property_name)

895

896

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

1317

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

1318

self.dbus_object_path, interface_name, property_name))

1319

1320

@classmethod

1321

def _get_all_interface_names(cls):

1322

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

1323

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

1324

"_dbus_interface", None)

1325

for x in (inspect.getmro(cls))

1326

for attr in dir(x))

1327

if name is not None)

1328

1329

@dbus.service.method(dbus.PROPERTIES_IFACE,

1330

in_signature="ss",

897

1331

out_signature="v")

898

1332

def Get(self, interface_name, property_name):

899

1333

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

905

1339

if not hasattr(value, "variant_level"):

906

1340

return value

907

1341

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

908

1342

909

1343

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

910

1344

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

911

1345

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

923

1357

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

924

1358

for byte in value))

925

1359

prop(value)

926

927

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

1360

1361

@dbus.service.method(dbus.PROPERTIES_IFACE,

1362

in_signature="s",

928

1363

out_signature="a{sv}")

929

1364

def GetAll(self, interface_name):

930

1365

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

931

1366

standard.

932

1367

933

1368

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

934

1369

"""

935

1370

properties = {}

945

1380

if not hasattr(value, "variant_level"):

946

1381

properties[name] = value

947

1382

continue

948

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

949

value.variant_level+1)

1383

properties[name] = type(value)(

1384

value, variant_level=value.variant_level + 1)

950

1385

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

951

1386

1387

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

1388

def PropertiesChanged(self, interface_name, changed_properties,

1389

invalidated_properties):

1390

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

1391

standard.

1392

"""

1393

pass

1394

952

1395

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

953

1396

out_signature="s",

954

1397

path_keyword='object_path',

955

1398

connection_keyword='connection')

956

1399

def Introspect(self, object_path, connection):

957

1400

"""Overloading of standard D-Bus method.

958

1401

959

1402

Inserts property tags and interface annotation tags.

960

1403

"""

961

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

962

connection)

1404

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1405

object_path,

1406

connection)

963

1407

try:

964

1408

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

1409

965

1410

def make_tag(document, name, prop):

966

1411

e = document.createElement("property")

967

1412

e.setAttribute("name", name)

968

1413

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

969

1414

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

970

1415

return e

1416

971

1417

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

972

1418

# Add property tags

973

1419

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

976

1422

if prop._dbus_interface

977

1423

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

978

1424

if_tag.appendChild(tag)

979

# Add annotation tags

980

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

981

for tag in if_tag.getElementsByTagName(typ):

982

annots = dict()

983

for name, prop in (self.

984

_get_all_dbus_things(typ)):

985

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

986

and prop._dbus_interface

987

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

988

annots.update(getattr

989

(prop,

990

"_dbus_annotations",

991

{}))

992

for name, value in annots.items():

993

ann_tag = document.createElement(

994

"annotation")

995

ann_tag.setAttribute("name", name)

996

ann_tag.setAttribute("value", value)

997

tag.appendChild(ann_tag)

998

# Add interface annotation tags

999

for annotation, value in dict(

1000

itertools.chain.from_iterable(

1001

annotations().items()

1002

for name, annotations in

1003

self._get_all_dbus_things("interface")

1004

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

1005

)).items():

1006

ann_tag = document.createElement("annotation")

1007

ann_tag.setAttribute("name", annotation)

1008

ann_tag.setAttribute("value", value)

1009

if_tag.appendChild(ann_tag)

1425

# Add annotation tags for properties

1426

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

1427

annots = dict()

1428

for name, prop in self._get_all_dbus_things(

1429

"property"):

1430

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

1431

and prop._dbus_interface

1432

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

1433

annots.update(getattr(

1434

prop, "_dbus_annotations", {}))

1435

for name, value in annots.items():

1436

ann_tag = document.createElement(

1437

"annotation")

1438

ann_tag.setAttribute("name", name)

1439

ann_tag.setAttribute("value", value)

1440

tag.appendChild(ann_tag)

1010

1441

# Add the names to the return values for the

1011

1442

# "org.freedesktop.DBus.Properties" methods

1012

1443

if (if_tag.getAttribute("name")

1031

1462

return xmlstring

1032

1463

1033

1464

1465

try:

1466

dbus.OBJECT_MANAGER_IFACE

1467

except AttributeError:

1468

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

1469

1470

1471

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1472

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

1473

1474

Classes inheriting from this exposes the standard

1475

GetManagedObjects call and the InterfacesAdded and

1476

InterfacesRemoved signals on the standard

1477

"org.freedesktop.DBus.ObjectManager" interface.

1478

1479

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

1480

manually.

1481

"""

1482

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1483

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

1484

def GetManagedObjects(self):

1485

"""This function must be overridden"""

1486

raise NotImplementedError()

1487

1488

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1489

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

1490

def InterfacesAdded(self, object_path, interfaces_and_properties):

1491

pass

1492

1493

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

1494

def InterfacesRemoved(self, object_path, interfaces):

1495

pass

1496

1497

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1498

out_signature="s",

1499

path_keyword='object_path',

1500

connection_keyword='connection')

1501

def Introspect(self, object_path, connection):

1502

"""Overloading of standard D-Bus method.

1503

1504

Override return argument name of GetManagedObjects to be

1505

"objpath_interfaces_and_properties"

1506

"""

1507

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1508

object_path,

1509

connection)

1510

try:

1511

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

1512

1513

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

1514

# Fix argument name for the GetManagedObjects method

1515

if (if_tag.getAttribute("name")

1516

== dbus.OBJECT_MANAGER_IFACE):

1517

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

1518

if (cn.getAttribute("name")

1519

== "GetManagedObjects"):

1520

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

1521

if (arg.getAttribute("direction")

1522

== "out"):

1523

arg.setAttribute(

1524

"name",

1525

"objpath_interfaces"

1526

"_and_properties")

1527

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

1528

document.unlink()

1529

except (AttributeError, xml.dom.DOMException,

1530

xml.parsers.expat.ExpatError) as error:

1531

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

1532

exc_info=error)

1533

return xmlstring

1534

1535

1034

1536

def datetime_to_dbus(dt, variant_level=0):

1035

1537

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

1036

1538

if dt is None:

1037

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

1038

return dbus.String(dt.isoformat(),

1039

variant_level=variant_level)

1539

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

1540

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

1040

1541

1041

1542

1042

1543

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1044

1545

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

1045

1546

interface names according to the "alt_interface_names" mapping.

1046

1547

Usage:

1047

1548

1048

1549

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

1049

1550

"net.example.AlternateInterface"})

1050

1551

class SampleDBusObject(dbus.service.Object):

1051

1552

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

1052

1553

def SampleDBusMethod():

1053

1554

pass

1054

1555

1055

1556

The above "SampleDBusMethod" on "SampleDBusObject" will be

1056

1557

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

1057

1558

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

1058

1559

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

1059

1560

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

1060

1561

1061

1562

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

1062

1563

(from DBusObjectWithProperties) and interfaces (from the

1063

1564

dbus_interface_annotations decorator).

1064

1565

"""

1566

1065

1567

def wrapper(cls):

1066

1568

for orig_interface_name, alt_interface_name in (

1067

alt_interface_names.items()):

1569

alt_interface_names.items()):

1068

1570

attr = {}

1069

1571

interface_names = set()

1070

1572

# Go though all attributes of the class

1072

1574

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

1073

1575

# with the wrong interface name

1074

1576

if (not hasattr(attribute, "_dbus_interface")

1075

or not attribute._dbus_interface

1076

.startswith(orig_interface_name)):

1577

or not attribute._dbus_interface.startswith(

1578

orig_interface_name)):

1077

1579

continue

1078

1580

# Create an alternate D-Bus interface name based on

1079

1581

# the current name

1080

alt_interface = (attribute._dbus_interface

1081

.replace(orig_interface_name,

1082

alt_interface_name))

1582

alt_interface = attribute._dbus_interface.replace(

1583

orig_interface_name, alt_interface_name)

1083

1584

interface_names.add(alt_interface)

1084

1585

# Is this a D-Bus signal?

1085

1586

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

1086

1587

# Extract the original non-method undecorated

1087

1588

# function by black magic

1088

nonmethod_func = (dict(

1589

if sys.version_info.major == 2:

1590

nonmethod_func = (dict(

1089

1591

zip(attribute.func_code.co_freevars,

1090

attribute.__closure__))["func"]

1091

.cell_contents)

1592

attribute.__closure__))

1593

["func"].cell_contents)

1594

else:

1595

nonmethod_func = (dict(

1596

zip(attribute.__code__.co_freevars,

1597

attribute.__closure__))

1598

["func"].cell_contents)

1092

1599

# Create a new, but exactly alike, function

1093

1600

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

1094

1601

# with the alternate D-Bus interface name

1095

new_function = (dbus.service.signal

1096

(alt_interface,

1097

attribute._dbus_signature)

1098

(types.FunctionType(

1099

nonmethod_func.func_code,

1100

nonmethod_func.func_globals,

1101

nonmethod_func.func_name,

1102

nonmethod_func.func_defaults,

1103

nonmethod_func.func_closure)))

1602

new_function = copy_function(nonmethod_func)

1603

new_function = (dbus.service.signal(

1604

alt_interface,

1605

attribute._dbus_signature)(new_function))

1104

1606

# Copy annotations, if any

1105

1607

try:

1106

new_function._dbus_annotations = (

1107

dict(attribute._dbus_annotations))

1608

new_function._dbus_annotations = dict(

1609

attribute._dbus_annotations)

1108

1610

except AttributeError:

1109

1611

pass

1612

1110

1613

# Define a creator of a function to call both the

1111

1614

# original and alternate functions, so both the

1112

1615

# original and alternate signals gets sent when

1115

1618

"""This function is a scope container to pass

1116

1619

func1 and func2 to the "call_both" function

1117

1620

outside of its arguments"""

1621

1622

@functools.wraps(func2)

1118

1623

def call_both(*args, **kwargs):

1119

1624

"""This function will emit two D-Bus

1120

1625

signals by calling func1 and func2"""

1121

1626

func1(*args, **kwargs)

1122

1627

func2(*args, **kwargs)

1628

# Make wrapper function look like a D-Bus

1629

# signal

1630

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

1631

if name.startswith("_dbus_"):

1632

setattr(call_both, name, attr)

1633

1123

1634

return call_both

1124

1635

# Create the "call_both" function and add it to

1125

1636

# the class

1130

1641

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

1131

1642

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

1132

1643

# to the class.

1133

attr[attrname] = (dbus.service.method

1134

(alt_interface,

1135

attribute._dbus_in_signature,

1136

attribute._dbus_out_signature)

1137

(types.FunctionType

1138

(attribute.func_code,

1139

attribute.func_globals,

1140

attribute.func_name,

1141

attribute.func_defaults,

1142

attribute.func_closure)))

1644

attr[attrname] = (

1645

dbus.service.method(

1646

alt_interface,

1647

attribute._dbus_in_signature,

1648

attribute._dbus_out_signature)

1649

(copy_function(attribute)))

1143

1650

# Copy annotations, if any

1144

1651

try:

1145

attr[attrname]._dbus_annotations = (

1146

dict(attribute._dbus_annotations))

1652

attr[attrname]._dbus_annotations = dict(

1653

attribute._dbus_annotations)

1147

1654

except AttributeError:

1148

1655

pass

1149

1656

# Is this a D-Bus property?

1152

1659

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

1153

1660

# property with the alternate D-Bus interface

1154

1661

# name. Add it to the class.

1155

attr[attrname] = (dbus_service_property

1156

(alt_interface,

1157

attribute._dbus_signature,

1158

attribute._dbus_access,

1159

attribute

1160

._dbus_get_args_options

1161

["byte_arrays"])

1162

(types.FunctionType

1163

(attribute.func_code,

1164

attribute.func_globals,

1165

attribute.func_name,

1166

attribute.func_defaults,

1167

attribute.func_closure)))

1662

attr[attrname] = (dbus_service_property(

1663

alt_interface, attribute._dbus_signature,

1664

attribute._dbus_access,

1665

attribute._dbus_get_args_options

1666

["byte_arrays"])

1667

(copy_function(attribute)))

1168

1668

# Copy annotations, if any

1169

1669

try:

1170

attr[attrname]._dbus_annotations = (

1171

dict(attribute._dbus_annotations))

1670

attr[attrname]._dbus_annotations = dict(

1671

attribute._dbus_annotations)

1172

1672

except AttributeError:

1173

1673

pass

1174

1674

# Is this a D-Bus interface?

1177

1677

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

1178

1678

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

1179

1679

# to the class.

1180

attr[attrname] = (dbus_interface_annotations

1181

(alt_interface)

1182

(types.FunctionType

1183

(attribute.func_code,

1184

attribute.func_globals,

1185

attribute.func_name,

1186

attribute.func_defaults,

1187

attribute.func_closure)))

1680

attr[attrname] = (

1681

dbus_interface_annotations(alt_interface)

1682

(copy_function(attribute)))

1188

1683

if deprecate:

1189

1684

# Deprecate all alternate interfaces

1190

iname="_AlternateDBusNames_interface_annotation{}"

1685

iname = "_AlternateDBusNames_interface_annotation{}"

1191

1686

for interface_name in interface_names:

1687

1192

1688

@dbus_interface_annotations(interface_name)

1193

1689

def func(self):

1194

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

1195

"true" }

1690

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

1691

"true"}

1196

1692

# Find an unused name

1197

1693

for aname in (iname.format(i)

1198

1694

for i in itertools.count()):

1202

1698

if interface_names:

1203

1699

# Replace the class with a new subclass of it with

1204

1700

# methods, signals, etc. as created above.

1205

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

1206

(cls,), attr)

1701

if sys.version_info.major == 2:

1702

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

1703

(cls, ), attr)

1704

else:

1705

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

1706

(cls, ), attr)

1207

1707

return cls

1708

1208

1709

return wrapper

1209

1710

1210

1711

1211

1712

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

1212

"se.bsnet.fukt.Mandos"})

1713

"se.bsnet.fukt.Mandos"})

1213

1714

class ClientDBus(Client, DBusObjectWithProperties):

1214

1715

"""A Client class using D-Bus

1215

1716

1216

1717

Attributes:

1217

1718

dbus_object_path: dbus.ObjectPath

1218

1719

bus: dbus.SystemBus()

1219

1720

"""

1220

1721

1221

1722

runtime_expansions = (Client.runtime_expansions

1222

+ ("dbus_object_path",))

1223

1723

+ ("dbus_object_path", ))

1724

1725

_interface = "se.recompile.Mandos.Client"

1726

1224

1727

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

1225

1226

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

1728

1729

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

1227

1730

self.bus = bus

1228

1731

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

1229

1732

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

1230

1733

# the D-Bus

1231

client_object_name = unicode(self.name).translate(

1734

client_object_name = str(self.name).translate(

1232

1735

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

1233

1736

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

1234

self.dbus_object_path = (dbus.ObjectPath

1235

("/clients/" + client_object_name))

1737

self.dbus_object_path = dbus.ObjectPath(

1738

"/clients/" + client_object_name)

1236

1739

DBusObjectWithProperties.__init__(self, self.bus,

1237

1740

self.dbus_object_path)

1238

1239

def notifychangeproperty(transform_func,

1240

dbus_name, type_func=lambda x: x,

1241

variant_level=1):

1741

1742

def notifychangeproperty(transform_func, dbus_name,

1743

type_func=lambda x: x,

1744

variant_level=1,

1745

invalidate_only=False,

1746

_interface=_interface):

1242

1747

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

1243

1748

its changes to DBus.

1244

1749

1245

1750

transform_fun: Function that takes a value and a variant_level

1246

1751

and transforms it to a D-Bus type.

1247

1752

dbus_name: D-Bus name of the variable

1250

1755

variant_level: D-Bus variant level. Default: 1

1251

1756

"""

1252

1757

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

1758

1253

1759

def setter(self, value):

1254

1760

if hasattr(self, "dbus_object_path"):

1255

1761

if (not hasattr(self, attrname) or

1256

1762

type_func(getattr(self, attrname, None))

1257

1763

!= type_func(value)):

1258

dbus_value = transform_func(type_func(value),

1259

variant_level

1260

=variant_level)

1261

self.PropertyChanged(dbus.String(dbus_name),

1262

dbus_value)

1764

if invalidate_only:

1765

self.PropertiesChanged(

1766

_interface, dbus.Dictionary(),

1767

dbus.Array((dbus_name, )))

1768

else:

1769

dbus_value = transform_func(

1770

type_func(value),

1771

variant_level=variant_level)

1772

self.PropertyChanged(dbus.String(dbus_name),

1773

dbus_value)

1774

self.PropertiesChanged(

1775

_interface,

1776

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

1777

dbus_value}),

1778

dbus.Array())

1263

1779

setattr(self, attrname, value)

1264

1780

1265

1781

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

1266

1782

1267

1783

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1268

1784

approvals_pending = notifychangeproperty(dbus.Boolean,

1269

1785

"ApprovalPending",

1270

type_func = bool)

1786

type_func=bool)

1271

1787

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

1272

1788

last_enabled = notifychangeproperty(datetime_to_dbus,

1273

1789

"LastEnabled")

1274

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

1275

type_func = lambda checker:

1276

checker is not None)

1790

checker = notifychangeproperty(

1791

dbus.Boolean, "CheckerRunning",

1792

type_func=lambda checker: checker is not None)

1277

1793

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1278

1794

"LastCheckedOK")

1279

1795

last_checker_status = notifychangeproperty(dbus.Int16,

1282

1798

datetime_to_dbus, "LastApprovalRequest")

1283

1799

approved_by_default = notifychangeproperty(dbus.Boolean,

1284

1800

"ApprovedByDefault")

1285

approval_delay = notifychangeproperty(dbus.UInt64,

1286

"ApprovalDelay",

1287

type_func =

1288

lambda td: td.total_seconds()

1289

* 1000)

1801

approval_delay = notifychangeproperty(

1802

dbus.UInt64, "ApprovalDelay",

1803

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

1290

1804

approval_duration = notifychangeproperty(

1291

1805

dbus.UInt64, "ApprovalDuration",

1292

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

1806

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

1293

1807

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

1294

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

1295

type_func = lambda td:

1296

td.total_seconds() * 1000)

1808

timeout = notifychangeproperty(

1809

dbus.UInt64, "Timeout",

1810

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

1297

1811

extended_timeout = notifychangeproperty(

1298

1812

dbus.UInt64, "ExtendedTimeout",

1299

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

1300

interval = notifychangeproperty(dbus.UInt64,

1301

"Interval",

1302

type_func =

1303

lambda td: td.total_seconds()

1304

* 1000)

1813

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

1814

interval = notifychangeproperty(

1815

dbus.UInt64, "Interval",

1816

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

1305

1817

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

1306

1818

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

1819

invalidate_only=True)

1820

1307

1821

del notifychangeproperty

1308

1822

1309

1823

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

1310

1824

try:

1311

1825

self.remove_from_connection()

1314

1828

if hasattr(DBusObjectWithProperties, "__del__"):

1315

1829

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

1316

1830

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

1317

1318

def checker_callback(self, pid, condition, command,

1319

*args, **kwargs):

1320

self.checker_callback_tag = None

1321

self.checker = None

1322

if os.WIFEXITED(condition):

1323

exitstatus = os.WEXITSTATUS(condition)

1831

1832

def checker_callback(self, source, condition,

1833

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

1834

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

1835

connection, command, *args,

1836

**kwargs)

1837

exitstatus = self.last_checker_status

1838

if exitstatus >= 0:

1324

1839

# Emit D-Bus signal

1325

1840

self.CheckerCompleted(dbus.Int16(exitstatus),

1326

dbus.Int64(condition),

1841

# This is specific to GNU libC

1842

dbus.Int64(exitstatus << 8),

1327

1843

dbus.String(command))

1328

1844

else:

1329

1845

# Emit D-Bus signal

1330

1846

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

1331

dbus.Int64(condition),

1847

dbus.Int64(

1848

# This is specific to GNU libC

1849

(exitstatus << 8)

1850

| self.last_checker_signal),

1332

1851

dbus.String(command))

1333

1334

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

1335

*args, **kwargs)

1336

1852

return ret

1853

1337

1854

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

1338

1855

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

1339

1856

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

1343

1860

# Emit D-Bus signal

1344

1861

self.CheckerStarted(self.current_checker_command)

1345

1862

return r

1346

1863

1347

1864

def _reset_approved(self):

1348

1865

self.approved = None

1349

1866

return False

1350

1867

1351

1868

def approve(self, value=True):

1352

1869

self.approved = value

1353

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

1354

* 1000), self._reset_approved)

1870

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

1871

* 1000), self._reset_approved)

1355

1872

self.send_changedstate()

1356

1357

## D-Bus methods, signals & properties

1358

_interface = "se.recompile.Mandos.Client"

1359

1360

## Interfaces

1361

1362

@dbus_interface_annotations(_interface)

1363

def _foo(self):

1364

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

1365

"false"}

1366

1367

## Signals

1368

1873

1874

# D-Bus methods, signals & properties

1875

1876

# Interfaces

1877

1878

# Signals

1879

1369

1880

# CheckerCompleted - signal

1370

1881

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

1371

1882

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

1372

1883

"D-Bus signal"

1373

1884

pass

1374

1885

1375

1886

# CheckerStarted - signal

1376

1887

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

1377

1888

def CheckerStarted(self, command):

1378

1889

"D-Bus signal"

1379

1890

pass

1380

1891

1381

1892

# PropertyChanged - signal

1893

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

1382

1894

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

1383

1895

def PropertyChanged(self, property, value):

1384

1896

"D-Bus signal"

1385

1897

pass

1386

1898

1387

1899

# GotSecret - signal

1388

1900

@dbus.service.signal(_interface)

1389

1901

def GotSecret(self):

1392

1904

server to mandos-client

1393

1905

"""

1394

1906

pass

1395

1907

1396

1908

# Rejected - signal

1397

1909

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

1398

1910

def Rejected(self, reason):

1399

1911

"D-Bus signal"

1400

1912

pass

1401

1913

1402

1914

# NeedApproval - signal

1403

1915

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

1404

1916

def NeedApproval(self, timeout, default):

1405

1917

"D-Bus signal"

1406

1918

return self.need_approval()

1407

1408

## Methods

1409

1919

1920

# Methods

1921

1410

1922

# Approve - method

1411

1923

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

1412

1924

def Approve(self, value):

1413

1925

self.approve(value)

1414

1926

1415

1927

# CheckedOK - method

1416

1928

@dbus.service.method(_interface)

1417

1929

def CheckedOK(self):

1418

1930

self.checked_ok()

1419

1931

1420

1932

# Enable - method

1933

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

1421

1934

@dbus.service.method(_interface)

1422

1935

def Enable(self):

1423

1936

"D-Bus method"

1424

1937

self.enable()

1425

1938

1426

1939

# StartChecker - method

1940

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

1427

1941

@dbus.service.method(_interface)

1428

1942

def StartChecker(self):

1429

1943

"D-Bus method"

1430

1944

self.start_checker()

1431

1945

1432

1946

# Disable - method

1947

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

1433

1948

@dbus.service.method(_interface)

1434

1949

def Disable(self):

1435

1950

"D-Bus method"

1436

1951

self.disable()

1437

1952

1438

1953

# StopChecker - method

1954

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

1439

1955

@dbus.service.method(_interface)

1440

1956

def StopChecker(self):

1441

1957

self.stop_checker()

1442

1443

## Properties

1444

1958

1959

# Properties

1960

1445

1961

# ApprovalPending - property

1446

1962

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

1447

1963

def ApprovalPending_dbus_property(self):

1448

1964

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

1449

1965

1450

1966

# ApprovedByDefault - property

1451

@dbus_service_property(_interface, signature="b",

1967

@dbus_service_property(_interface,

1968

signature="b",

1452

1969

access="readwrite")

1453

1970

def ApprovedByDefault_dbus_property(self, value=None):

1454

1971

if value is None: # get

1455

1972

return dbus.Boolean(self.approved_by_default)

1456

1973

self.approved_by_default = bool(value)

1457

1974

1458

1975

# ApprovalDelay - property

1459

@dbus_service_property(_interface, signature="t",

1976

@dbus_service_property(_interface,

1977

signature="t",

1460

1978

access="readwrite")

1461

1979

def ApprovalDelay_dbus_property(self, value=None):

1462

1980

if value is None: # get

1463

1981

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

1464

1982

* 1000)

1465

1983

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

1466

1984

1467

1985

# ApprovalDuration - property

1468

@dbus_service_property(_interface, signature="t",

1986

@dbus_service_property(_interface,

1987

signature="t",

1469

1988

access="readwrite")

1470

1989

def ApprovalDuration_dbus_property(self, value=None):

1471

1990

if value is None: # get

1472

1991

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

1473

1992

* 1000)

1474

1993

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

1475

1994

1476

1995

# Name - property

1996

@dbus_annotations(

1997

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

1477

1998

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

1478

1999

def Name_dbus_property(self):

1479

2000

return dbus.String(self.name)

1480

2001

1481

2002

# Fingerprint - property

2003

@dbus_annotations(

2004

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

1482

2005

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

1483

2006

def Fingerprint_dbus_property(self):

1484

2007

return dbus.String(self.fingerprint)

1485

2008

1486

2009

# Host - property

1487

@dbus_service_property(_interface, signature="s",

2010

@dbus_service_property(_interface,

2011

signature="s",

1488

2012

access="readwrite")

1489

2013

def Host_dbus_property(self, value=None):

1490

2014

if value is None: # get

1491

2015

return dbus.String(self.host)

1492

self.host = unicode(value)

1493

2016

self.host = str(value)

2017

1494

2018

# Created - property

2019

@dbus_annotations(

2020

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

1495

2021

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

1496

2022

def Created_dbus_property(self):

1497

2023

return datetime_to_dbus(self.created)

1498

2024

1499

2025

# LastEnabled - property

1500

2026

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

1501

2027

def LastEnabled_dbus_property(self):

1502

2028

return datetime_to_dbus(self.last_enabled)

1503

2029

1504

2030

# Enabled - property

1505

@dbus_service_property(_interface, signature="b",

2031

@dbus_service_property(_interface,

2032

signature="b",

1506

2033

access="readwrite")

1507

2034

def Enabled_dbus_property(self, value=None):

1508

2035

if value is None: # get

1511

2038

self.enable()

1512

2039

else:

1513

2040

self.disable()

1514

2041

1515

2042

# LastCheckedOK - property

1516

@dbus_service_property(_interface, signature="s",

2043

@dbus_service_property(_interface,

2044

signature="s",

1517

2045

access="readwrite")

1518

2046

def LastCheckedOK_dbus_property(self, value=None):

1519

2047

if value is not None:

1520

2048

self.checked_ok()

1521

2049

return

1522

2050

return datetime_to_dbus(self.last_checked_ok)

1523

2051

1524

2052

# LastCheckerStatus - property

1525

@dbus_service_property(_interface, signature="n",

1526

access="read")

2053

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

1527

2054

def LastCheckerStatus_dbus_property(self):

1528

2055

return dbus.Int16(self.last_checker_status)

1529

2056

1530

2057

# Expires - property

1531

2058

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

1532

2059

def Expires_dbus_property(self):

1533

2060

return datetime_to_dbus(self.expires)

1534

2061

1535

2062

# LastApprovalRequest - property

1536

2063

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

1537

2064

def LastApprovalRequest_dbus_property(self):

1538

2065

return datetime_to_dbus(self.last_approval_request)

1539

2066

1540

2067

# Timeout - property

1541

@dbus_service_property(_interface, signature="t",

2068

@dbus_service_property(_interface,

2069

signature="t",

1542

2070

access="readwrite")

1543

2071

def Timeout_dbus_property(self, value=None):

1544

2072

if value is None: # get

1556

2084

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

1557

2085

is None):

1558

2086

return

1559

gobject.source_remove(self.disable_initiator_tag)

1560

self.disable_initiator_tag = (

1561

gobject.timeout_add(

1562

int((self.expires - now).total_seconds()

1563

* 1000), self.disable))

1564

2087

GLib.source_remove(self.disable_initiator_tag)

2088

self.disable_initiator_tag = GLib.timeout_add(

2089

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

2090

self.disable)

2091

1565

2092

# ExtendedTimeout - property

1566

@dbus_service_property(_interface, signature="t",

2093

@dbus_service_property(_interface,

2094

signature="t",

1567

2095

access="readwrite")

1568

2096

def ExtendedTimeout_dbus_property(self, value=None):

1569

2097

if value is None: # get

1570

2098

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

1571

2099

* 1000)

1572

2100

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

1573

2101

1574

2102

# Interval - property

1575

@dbus_service_property(_interface, signature="t",

2103

@dbus_service_property(_interface,

2104

signature="t",

1576

2105

access="readwrite")

1577

2106

def Interval_dbus_property(self, value=None):

1578

2107

if value is None: # get

1582

2111

return

1583

2112

if self.enabled:

1584

2113

# Reschedule checker run

1585

gobject.source_remove(self.checker_initiator_tag)

1586

self.checker_initiator_tag = (gobject.timeout_add

1587

(value, self.start_checker))

1588

self.start_checker() # Start one now, too

1589

2114

GLib.source_remove(self.checker_initiator_tag)

2115

self.checker_initiator_tag = GLib.timeout_add(

2116

value, self.start_checker)

2117

self.start_checker() # Start one now, too

2118

1590

2119

# Checker - property

1591

@dbus_service_property(_interface, signature="s",

2120

@dbus_service_property(_interface,

2121

signature="s",

1592

2122

access="readwrite")

1593

2123

def Checker_dbus_property(self, value=None):

1594

2124

if value is None: # get

1595

2125

return dbus.String(self.checker_command)

1596

self.checker_command = unicode(value)

1597

2126

self.checker_command = str(value)

2127

1598

2128

# CheckerRunning - property

1599

@dbus_service_property(_interface, signature="b",

2129

@dbus_service_property(_interface,

2130

signature="b",

1600

2131

access="readwrite")

1601

2132

def CheckerRunning_dbus_property(self, value=None):

1602

2133

if value is None: # get

1605

2136

self.start_checker()

1606

2137

else:

1607

2138

self.stop_checker()

1608

2139

1609

2140

# ObjectPath - property

2141

@dbus_annotations(

2142

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

2143

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

1610

2144

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

1611

2145

def ObjectPath_dbus_property(self):

1612

return self.dbus_object_path # is already a dbus.ObjectPath

1613

2146

return self.dbus_object_path # is already a dbus.ObjectPath

2147

1614

2148

# Secret = property

1615

@dbus_service_property(_interface, signature="ay",

1616

access="write", byte_arrays=True)

2149

@dbus_annotations(

2150

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

2151

"invalidates"})

2152

@dbus_service_property(_interface,

2153

signature="ay",

2154

access="write",

2155

byte_arrays=True)

1617

2156

def Secret_dbus_property(self, value):

1618

self.secret = str(value)

1619

2157

self.secret = bytes(value)

2158

1620

2159

del _interface

1621

2160

1622

2161

1625

2164

self._pipe = child_pipe

1626

2165

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

1627

2166

if not self._pipe.recv():

1628

raise KeyError()

1629

2167

raise KeyError(fpr)

2168

1630

2169

def __getattribute__(self, name):

1631

2170

if name == '_pipe':

1632

2171

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

1635

2174

if data[0] == 'data':

1636

2175

return data[1]

1637

2176

if data[0] == 'function':

2177

1638

2178

def func(*args, **kwargs):

1639

2179

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

1640

2180

return self._pipe.recv()[1]

2181

1641

2182

return func

1642

2183

1643

2184

def __setattr__(self, name, value):

1644

2185

if name == '_pipe':

1645

2186

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

1648

2189

1649

2190

class ClientHandler(socketserver.BaseRequestHandler, object):

1650

2191

"""A class to handle client connections.

1651

2192

1652

2193

Instantiated once for each connection to handle it.

1653

2194

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

1654

2195

1655

2196

def handle(self):

1656

2197

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

1657

2198

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

1658

unicode(self.client_address))

2199

str(self.client_address))

1659

2200

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

1660

2201

self.server.child_pipe.fileno())

1661

1662

session = (gnutls.connection

1663

.ClientSession(self.request,

1664

gnutls.connection

1665

.X509Credentials()))

1666

1667

# Note: gnutls.connection.X509Credentials is really a

1668

# generic GnuTLS certificate credentials object so long as

1669

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

1670

# here despite using OpenPGP certificates.

1671

1672

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

1673

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

1674

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

1675

# "+DHE-DSS"))

2202

2203

session = gnutls.ClientSession(self.request)

2204

2205

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

2206

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

2207

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

2208

# "+DHE-DSS"))

1676

2209

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

1677

2210

priority = self.server.gnutls_priority

1678

2211

if priority is None:

1679

2212

priority = "NORMAL"

1680

(gnutls.library.functions

1681

.gnutls_priority_set_direct(session._c_object,

1682

priority, None))

1683

2213

gnutls.priority_set_direct(session._c_object,

2214

priority.encode("utf-8"),

2215

None)

2216

1684

2217

# Start communication using the Mandos protocol

1685

2218

# Get protocol number

1686

2219

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

1691

2224

except (ValueError, IndexError, RuntimeError) as error:

1692

2225

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

1693

2226

return

1694

2227

1695

2228

# Start GnuTLS connection

1696

2229

try:

1697

2230

session.handshake()

1698

except gnutls.errors.GNUTLSError as error:

2231

except gnutls.Error as error:

1699

2232

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

1700

2233

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

1701

2234

# established. Just abandon the request.

1702

2235

return

1703

2236

logger.debug("Handshake succeeded")

1704

2237

1705

2238

approval_required = False

1706

2239

try:

1707

2240

try:

1708

fpr = self.fingerprint(self.peer_certificate

1709

(session))

1710

except (TypeError,

1711

gnutls.errors.GNUTLSError) as error:

2241

fpr = self.fingerprint(

2242

self.peer_certificate(session))

2243

except (TypeError, gnutls.Error) as error:

1712

2244

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

1713

2245

return

1714

2246

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

1715

2247

1716

2248

try:

1717

2249

client = ProxyClient(child_pipe, fpr,

1718

2250

self.client_address)

1719

2251

except KeyError:

1720

2252

return

1721

2253

1722

2254

if client.approval_delay:

1723

2255

delay = client.approval_delay

1724

2256

client.approvals_pending += 1

1725

2257

approval_required = True

1726

2258

1727

2259

while True:

1728

2260

if not client.enabled:

1729

2261

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

1730

client.name)

2262

client.name)

1731

2263

if self.server.use_dbus:

1732

2264

# Emit D-Bus signal

1733

2265

client.Rejected("Disabled")

1734

2266

return

1735

2267

1736

2268

if client.approved or not client.approval_delay:

1737

#We are approved or approval is disabled

2269

# We are approved or approval is disabled

1738

2270

break

1739

2271

elif client.approved is None:

1740

2272

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

1751

2283

# Emit D-Bus signal

1752

2284

client.Rejected("Denied")

1753

2285

return

1754

1755

#wait until timeout or approved

2286

2287

# wait until timeout or approved

1756

2288

time = datetime.datetime.now()

1757

2289

client.changedstate.acquire()

1758

2290

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

1771

2303

break

1772

2304

else:

1773

2305

delay -= time2 - time

1774

1775

sent_size = 0

1776

while sent_size < len(client.secret):

1777

try:

1778

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

1779

except gnutls.errors.GNUTLSError as error:

1780

logger.warning("gnutls send failed",

1781

exc_info=error)

1782

return

1783

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

1784

sent, len(client.secret)

1785

- (sent_size + sent))

1786

sent_size += sent

1787

2306

2307

try:

2308

session.send(client.secret)

2309

except gnutls.Error as error:

2310

logger.warning("gnutls send failed",

2311

exc_info=error)

2312

return

2313

1788

2314

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

1789

2315

# bump the timeout using extended_timeout

1790

2316

client.bump_timeout(client.extended_timeout)

1791

2317

if self.server.use_dbus:

1792

2318

# Emit D-Bus signal

1793

2319

client.GotSecret()

1794

2320

1795

2321

finally:

1796

2322

if approval_required:

1797

2323

client.approvals_pending -= 1

1798

2324

try:

1799

2325

session.bye()

1800

except gnutls.errors.GNUTLSError as error:

2326

except gnutls.Error as error:

1801

2327

logger.warning("GnuTLS bye failed",

1802

2328

exc_info=error)

1803

2329

1804

2330

@staticmethod

1805

2331

def peer_certificate(session):

1806

2332

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

1807

2333

# If not an OpenPGP certificate...

1808

if (gnutls.library.functions

1809

.gnutls_certificate_type_get(session._c_object)

1810

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1811

# ...do the normal thing

1812

return session.peer_certificate

2334

if (gnutls.certificate_type_get(session._c_object)

2335

!= gnutls.CRT_OPENPGP):

2336

# ...return invalid data

2337

return b""

1813

2338

list_size = ctypes.c_uint(1)

1814

cert_list = (gnutls.library.functions

1815

.gnutls_certificate_get_peers

2339

cert_list = (gnutls.certificate_get_peers

1816

2340

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

1817

2341

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

1818

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

1819

" certificate")

2342

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

1820

2343

if list_size.value == 0:

1821

2344

return None

1822

2345

cert = cert_list[0]

1823

2346

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

1824

2347

1825

2348

@staticmethod

1826

2349

def fingerprint(openpgp):

1827

2350

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1828

2351

# New GnuTLS "datum" with the OpenPGP public key

1829

datum = (gnutls.library.types

1830

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

1831

ctypes.POINTER

1832

(ctypes.c_ubyte)),

1833

ctypes.c_uint(len(openpgp))))

2352

datum = gnutls.datum_t(

2353

ctypes.cast(ctypes.c_char_p(openpgp),

2354

ctypes.POINTER(ctypes.c_ubyte)),

2355

ctypes.c_uint(len(openpgp)))

1834

2356

# New empty GnuTLS certificate

1835

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1836

(gnutls.library.functions

1837

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2357

crt = gnutls.openpgp_crt_t()

2358

gnutls.openpgp_crt_init(ctypes.byref(crt))

1838

2359

# Import the OpenPGP public key into the certificate

1839

(gnutls.library.functions

1840

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

1841

gnutls.library.constants

1842

.GNUTLS_OPENPGP_FMT_RAW))

2360

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

2361

gnutls.OPENPGP_FMT_RAW)

1843

2362

# Verify the self signature in the key

1844

2363

crtverify = ctypes.c_uint()

1845

(gnutls.library.functions

1846

.gnutls_openpgp_crt_verify_self(crt, 0,

1847

ctypes.byref(crtverify)))

2364

gnutls.openpgp_crt_verify_self(crt, 0,

2365

ctypes.byref(crtverify))

1848

2366

if crtverify.value != 0:

1849

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1850

raise (gnutls.errors.CertificateSecurityError

1851

("Verify failed"))

2367

gnutls.openpgp_crt_deinit(crt)

2368

raise gnutls.CertificateSecurityError(code

2369

=crtverify.value)

1852

2370

# New buffer for the fingerprint

1853

2371

buf = ctypes.create_string_buffer(20)

1854

2372

buf_len = ctypes.c_size_t()

1855

2373

# Get the fingerprint from the certificate into the buffer

1856

(gnutls.library.functions

1857

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

1858

ctypes.byref(buf_len)))

2374

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

2375

ctypes.byref(buf_len))

1859

2376

# Deinit the certificate

1860

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2377

gnutls.openpgp_crt_deinit(crt)

1861

2378

# Convert the buffer to a Python bytestring

1862

2379

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

1863

2380

# Convert the bytestring to hexadecimal notation

1867

2384

1868

2385

class MultiprocessingMixIn(object):

1869

2386

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

2387

1870

2388

def sub_process_main(self, request, address):

1871

2389

try:

1872

2390

self.finish_request(request, address)

1873

2391

except Exception:

1874

2392

self.handle_error(request, address)

1875

2393

self.close_request(request)

1876

2394

1877

2395

def process_request(self, request, address):

1878

2396

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

1879

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

1880

args = (request, address))

2397

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

2398

args=(request, address))

1881

2399

proc.start()

1882

2400

return proc

1883

2401

1884

2402

1885

2403

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1886

2404

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

2405

1887

2406

def process_request(self, request, client_address):

1888

2407

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

1889

2408

1890

2409

This function creates a new pipe in self.pipe

1891

2410

"""

1892

2411

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1893

2412

1894

2413

proc = MultiprocessingMixIn.process_request(self, request,

1895

2414

client_address)

1896

2415

self.child_pipe.close()

1897

2416

self.add_pipe(parent_pipe, proc)

1898

2417

1899

2418

def add_pipe(self, parent_pipe, proc):

1900

2419

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

1901

2420

raise NotImplementedError()

1904

2423

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1905

2424

socketserver.TCPServer, object):

1906

2425

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

1907

2426

1908

2427

Attributes:

1909

2428

enabled: Boolean; whether this server is activated yet

1910

2429

interface: None or a network interface name (string)

1911

2430

use_ipv6: Boolean; to use IPv6 or not

1912

2431

"""

2432

1913

2433

def __init__(self, server_address, RequestHandlerClass,

1914

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

2434

interface=None,

2435

use_ipv6=True,

2436

socketfd=None):

1915

2437

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

1916

2438

creating a new one with socket.socket().

1917

2439

"""

1923

2445

self.socketfd = socketfd

1924

2446

# Save the original socket.socket() function

1925

2447

self.socket_socket = socket.socket

2448

1926

2449

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

1927

#

2450

#

1928

2451

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

1929

2452

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

1930

2453

# patching socket.socket.)

1931

#

2454

#

1932

2455

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

1933

2456

@functools.wraps(socket.socket)

1934

2457

def socket_wrapper(*args, **kwargs):

1946

2469

# socket_wrapper(), if socketfd was set.

1947

2470

socketserver.TCPServer.__init__(self, server_address,

1948

2471

RequestHandlerClass)

1949

2472

1950

2473

def server_bind(self):

1951

2474

"""This overrides the normal server_bind() function

1952

2475

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

1953

2476

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

2477

global SO_BINDTODEVICE

1954

2478

if self.interface is not None:

1955

2479

if SO_BINDTODEVICE is None:

1956

logger.error("SO_BINDTODEVICE does not exist;"

1957

" cannot bind to interface %s",

1958

self.interface)

1959

else:

1960

try:

1961

self.socket.setsockopt(socket.SOL_SOCKET,

1962

SO_BINDTODEVICE,

1963

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

1964

except socket.error as error:

1965

if error.errno == errno.EPERM:

1966

logger.error("No permission to bind to"

1967

" interface %s", self.interface)

1968

elif error.errno == errno.ENOPROTOOPT:

1969

logger.error("SO_BINDTODEVICE not available;"

1970

" cannot bind to interface %s",

1971

self.interface)

1972

elif error.errno == errno.ENODEV:

1973

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

1974

" cannot bind", self.interface)

1975

else:

1976

raise

2480

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

2481

# common enough.

2482

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

2483

SO_BINDTODEVICE = 25

2484

try:

2485

self.socket.setsockopt(

2486

socket.SOL_SOCKET, SO_BINDTODEVICE,

2487

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

2488

except socket.error as error:

2489

if error.errno == errno.EPERM:

2490

logger.error("No permission to bind to"

2491

" interface %s", self.interface)

2492

elif error.errno == errno.ENOPROTOOPT:

2493

logger.error("SO_BINDTODEVICE not available;"

2494

" cannot bind to interface %s",

2495

self.interface)

2496

elif error.errno == errno.ENODEV:

2497

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

2498

" cannot bind", self.interface)

2499

else:

2500

raise

1977

2501

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

1978

2502

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

1979

2503

if not self.server_address[0]:

1980

2504

if self.address_family == socket.AF_INET6:

1981

any_address = "::" # in6addr_any

2505

any_address = "::" # in6addr_any

1982

2506

else:

1983

any_address = "0.0.0.0" # INADDR_ANY

2507

any_address = "0.0.0.0" # INADDR_ANY

1984

2508

self.server_address = (any_address,

1985

2509

self.server_address[1])

1986

2510

elif not self.server_address[1]:

1987

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

1988

0)

2511

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

1989

2512

# if self.interface:

1990

2513

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

1991

2514

# 0, # port

1997

2520

1998

2521

class MandosServer(IPv6_TCPServer):

1999

2522

"""Mandos server.

2000

2523

2001

2524

Attributes:

2002

2525

clients: set of Client objects

2003

2526

gnutls_priority GnuTLS priority string

2004

2527

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

2005

2006

Assumes a gobject.MainLoop event loop.

2528

2529

Assumes a GLib.MainLoop event loop.

2007

2530

"""

2531

2008

2532

def __init__(self, server_address, RequestHandlerClass,

2009

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

2010

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

2533

interface=None,

2534

use_ipv6=True,

2535

clients=None,

2536

gnutls_priority=None,

2537

use_dbus=True,

2538

socketfd=None):

2011

2539

self.enabled = False

2012

2540

self.clients = clients

2013

2541

if self.clients is None:

2016

2544

self.gnutls_priority = gnutls_priority

2017

2545

IPv6_TCPServer.__init__(self, server_address,

2018

2546

RequestHandlerClass,

2019

interface = interface,

2020

use_ipv6 = use_ipv6,

2021

socketfd = socketfd)

2547

interface=interface,

2548

use_ipv6=use_ipv6,

2549

socketfd=socketfd)

2550

2022

2551

def server_activate(self):

2023

2552

if self.enabled:

2024

2553

return socketserver.TCPServer.server_activate(self)

2025

2554

2026

2555

def enable(self):

2027

2556

self.enabled = True

2028

2557

2029

2558

def add_pipe(self, parent_pipe, proc):

2030

2559

# Call "handle_ipc" for both data and EOF events

2031

gobject.io_add_watch(parent_pipe.fileno(),

2032

gobject.IO_IN | gobject.IO_HUP,

2033

functools.partial(self.handle_ipc,

2034

parent_pipe =

2035

parent_pipe,

2036

proc = proc))

2037

2038

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

2039

proc = None, client_object=None):

2560

GLib.io_add_watch(

2561

parent_pipe.fileno(),

2562

GLib.IO_IN | GLib.IO_HUP,

2563

functools.partial(self.handle_ipc,

2564

parent_pipe=parent_pipe,

2565

proc=proc))

2566

2567

def handle_ipc(self, source, condition,

2568

parent_pipe=None,

2569

proc=None,

2570

client_object=None):

2040

2571

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

2041

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

2572

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

2042

2573

# Wait for other process to exit

2043

2574

proc.join()

2044

2575

return False

2045

2576

2046

2577

# Read a request from the child

2047

2578

request = parent_pipe.recv()

2048

2579

command = request[0]

2049

2580

2050

2581

if command == 'init':

2051

fpr = request[1]

2582

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

2052

2583

address = request[2]

2053

2054

for c in self.clients.itervalues():

2584

2585

for c in self.clients.values():

2055

2586

if c.fingerprint == fpr:

2056

2587

client = c

2057

2588

break

2064

2595

address[0])

2065

2596

parent_pipe.send(False)

2066

2597

return False

2067

2068

gobject.io_add_watch(parent_pipe.fileno(),

2069

gobject.IO_IN | gobject.IO_HUP,

2070

functools.partial(self.handle_ipc,

2071

parent_pipe =

2072

parent_pipe,

2073

proc = proc,

2074

client_object =

2075

client))

2598

2599

GLib.io_add_watch(

2600

parent_pipe.fileno(),

2601

GLib.IO_IN | GLib.IO_HUP,

2602

functools.partial(self.handle_ipc,

2603

parent_pipe=parent_pipe,

2604

proc=proc,

2605

client_object=client))

2076

2606

parent_pipe.send(True)

2077

2607

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

2078

2608

# same fileno

2081

2611

funcname = request[1]

2082

2612

args = request[2]

2083

2613

kwargs = request[3]

2084

2614

2085

2615

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

2086

2616

funcname)(*args,

2087

**kwargs)))

2088

2617

**kwargs)))

2618

2089

2619

if command == 'getattr':

2090

2620

attrname = request[1]

2091

if callable(client_object.__getattribute__(attrname)):

2092

parent_pipe.send(('function',))

2621

if isinstance(client_object.__getattribute__(attrname),

2622

collections.Callable):

2623

parent_pipe.send(('function', ))

2093

2624

else:

2094

parent_pipe.send(('data', client_object

2095

.__getattribute__(attrname)))

2096

2625

parent_pipe.send((

2626

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

2627

2097

2628

if command == 'setattr':

2098

2629

attrname = request[1]

2099

2630

value = request[2]

2100

2631

setattr(client_object, attrname, value)

2101

2632

2102

2633

return True

2103

2634

2104

2635

2105

2636

def rfc3339_duration_to_delta(duration):

2106

2637

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

2107

2638

2108

2639

>>> rfc3339_duration_to_delta("P7D")

2109

2640

datetime.timedelta(7)

2110

2641

>>> rfc3339_duration_to_delta("PT60S")

2120

2651

>>> rfc3339_duration_to_delta("P1DT3M20S")

2121

2652

datetime.timedelta(1, 200)

2122

2653

"""

2123

2654

2124

2655

# Parsing an RFC 3339 duration with regular expressions is not

2125

2656

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

2126

2657

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

2127

2658

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

2128

2659

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

2129

2660

# avoid excessive use of external libraries.

2130

2661

2131

2662

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

2132

Token = collections.namedtuple("Token",

2133

("regexp", # To match token; if

2134

# "value" is not None,

2135

# must have a "group"

2136

# containing digits

2137

"value", # datetime.timedelta or

2138

# None

2139

"followers")) # Tokens valid after

2140

# this token

2663

Token = collections.namedtuple("Token", (

2664

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

2665

# a "group" containing digits

2666

"value", # datetime.timedelta or None

2667

"followers")) # Tokens valid after this token

2141

2668

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

2142

2669

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

2143

2670

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

2144

2671

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

2145

2672

datetime.timedelta(seconds=1),

2146

frozenset((token_end,)))

2673

frozenset((token_end, )))

2147

2674

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

2148

2675

datetime.timedelta(minutes=1),

2149

2676

frozenset((token_second, token_end)))

2165

2692

frozenset((token_month, token_end)))

2166

2693

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

2167

2694

datetime.timedelta(weeks=1),

2168

frozenset((token_end,)))

2695

frozenset((token_end, )))

2169

2696

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

2170

2697

frozenset((token_year, token_month,

2171

2698

token_day, token_time,

2172

2699

token_week)))

2173

# Define starting values

2174

value = datetime.timedelta() # Value so far

2700

# Define starting values:

2701

# Value so far

2702

value = datetime.timedelta()

2175

2703

found_token = None

2176

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

2177

s = duration # String left to parse

2704

# Following valid tokens

2705

followers = frozenset((token_duration, ))

2706

# String left to parse

2707

s = duration

2178

2708

# Loop until end token is found

2179

2709

while found_token is not token_end:

2180

2710

# Search for any currently valid tokens

2196

2726

break

2197

2727

else:

2198

2728

# No currently valid tokens were found

2199

raise ValueError("Invalid RFC 3339 duration")

2729

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

2730

.format(duration))

2200

2731

# End token found

2201

2732

return value

2202

2733

2203

2734

2204

2735

def string_to_delta(interval):

2205

2736

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

2206

2737

2207

2738

>>> string_to_delta('7d')

2208

2739

datetime.timedelta(7)

2209

2740

>>> string_to_delta('60s')

2217

2748

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

2218

2749

datetime.timedelta(0, 330)

2219

2750

"""

2220

2751

2221

2752

try:

2222

2753

return rfc3339_duration_to_delta(interval)

2223

2754

except ValueError:

2224

2755

pass

2225

2756

2226

2757

timevalue = datetime.timedelta(0)

2227

2758

for s in interval.split():

2228

2759

try:

2229

suffix = unicode(s[-1])

2760

suffix = s[-1]

2230

2761

value = int(s[:-1])

2231

2762

if suffix == "d":

2232

2763

delta = datetime.timedelta(value)

2239

2770

elif suffix == "w":

2240

2771

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

2241

2772

else:

2242

raise ValueError("Unknown suffix {!r}"

2243

.format(suffix))

2773

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

2244

2774

except IndexError as e:

2245

2775

raise ValueError(*(e.args))

2246

2776

timevalue += delta

2247

2777

return timevalue

2248

2778

2249

2779

2250

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

2780

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

2251

2781

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

2252

2782

2253

2783

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

2254

2784

if os.fork():

2255

2785

sys.exit()

2262

2792

# Close all standard open file descriptors

2263

2793

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

2264

2794

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

2265

raise OSError(errno.ENODEV, "{} not a character device"

2795

raise OSError(errno.ENODEV,

2796

"{} not a character device"

2266

2797

.format(os.devnull))

2267

2798

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

2268

2799

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

2272

2803

2273

2804

2274

2805

def main():

2275

2806

2276

2807

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

2277

2808

# Parsing of options, both command line and config file

2278

2809

2279

2810

parser = argparse.ArgumentParser()

2280

2811

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

2281

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

2812

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

2282

2813

help="show version number and exit")

2283

2814

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

2284

2815

help="Bind to interface IF")

2320

2851

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

2321

2852

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

2322

2853

default=None)

2323

2854

2324

2855

options = parser.parse_args()

2325

2856

2326

2857

if options.check:

2327

2858

import doctest

2328

2859

fail_count, test_count = doctest.testmod()

2329

2860

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

2330

2861

2331

2862

# Default values for config file for server-global settings

2332

server_defaults = { "interface": "",

2333

"address": "",

2334

"port": "",

2335

"debug": "False",

2336

"priority":

2337

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

2338

"servicename": "Mandos",

2339

"use_dbus": "True",

2340

"use_ipv6": "True",

2341

"debuglevel": "",

2342

"restore": "True",

2343

"socket": "",

2344

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

2345

"foreground": "False",

2346

"zeroconf": "True",

2347

}

2348

2863

server_defaults = {"interface": "",

2864

"address": "",

2865

"port": "",

2866

"debug": "False",

2867

"priority":

2868

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

2869

":+SIGN-DSA-SHA256",

2870

"servicename": "Mandos",

2871

"use_dbus": "True",

2872

"use_ipv6": "True",

2873

"debuglevel": "",

2874

"restore": "True",

2875

"socket": "",

2876

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

2877

"foreground": "False",

2878

"zeroconf": "True",

2879

}

2880

2349

2881

# Parse config file for server-global settings

2350

2882

server_config = configparser.SafeConfigParser(server_defaults)

2351

2883

del server_defaults

2352

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

2353

"mandos.conf"))

2884

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

2354

2885

# Convert the SafeConfigParser object to a dict

2355

2886

server_settings = server_config.defaults()

2356

2887

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

2357

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

2888

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

2889

"foreground", "zeroconf"):

2358

2890

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

2359

2891

option)

2360

2892

if server_settings["port"]:

2370

2902

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

2371

2903

["socket"])

2372

2904

del server_config

2373

2905

2374

2906

# Override the settings from the config file with command line

2375

2907

# options, if set.

2376

2908

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

2377

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

2378

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

2379

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

2909

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

2910

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

2911

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

2380

2912

value = getattr(options, option)

2381

2913

if value is not None:

2382

2914

server_settings[option] = value

2383

2915

del options

2384

2916

# Force all strings to be unicode

2385

2917

for option in server_settings.keys():

2386

if type(server_settings[option]) is str:

2387

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

2918

if isinstance(server_settings[option], bytes):

2919

server_settings[option] = (server_settings[option]

2920

.decode("utf-8"))

2388

2921

# Force all boolean options to be boolean

2389

2922

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

2390

2923

"foreground", "zeroconf"):

2393

2926

if server_settings["debug"]:

2394

2927

server_settings["foreground"] = True

2395

2928

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

2396

2929

2397

2930

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

2398

2399

if (not server_settings["zeroconf"] and

2400

not (server_settings["port"]

2401

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

2402

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

2403

" Zeroconf")

2404

2931

2932

if (not server_settings["zeroconf"]

2933

and not (server_settings["port"]

2934

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

2935

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

2936

2405

2937

# For convenience

2406

2938

debug = server_settings["debug"]

2407

2939

debuglevel = server_settings["debuglevel"]

2411

2943

stored_state_file)

2412

2944

foreground = server_settings["foreground"]

2413

2945

zeroconf = server_settings["zeroconf"]

2414

2946

2415

2947

if debug:

2416

2948

initlogger(debug, logging.DEBUG)

2417

2949

else:

2420

2952

else:

2421

2953

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

2422

2954

initlogger(debug, level)

2423

2955

2424

2956

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

2425

syslogger.setFormatter(logging.Formatter

2426

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

2427

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

2428

.format(server_settings

2429

["servicename"])))

2430

2957

syslogger.setFormatter(

2958

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

2959

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

2960

server_settings["servicename"])))

2961

2431

2962

# Parse config file with clients

2432

2963

client_config = configparser.SafeConfigParser(Client

2433

2964

.client_defaults)

2434

2965

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

2435

2966

"clients.conf"))

2436

2967

2437

2968

global mandos_dbus_service

2438

2969

mandos_dbus_service = None

2439

2970

2440

2971

socketfd = None

2441

2972

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

2442

2973

socketfd = server_settings["socket"]

2443

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

2444

server_settings["port"]),

2445

ClientHandler,

2446

interface=(server_settings["interface"]

2447

or None),

2448

use_ipv6=use_ipv6,

2449

gnutls_priority=

2450

server_settings["priority"],

2451

use_dbus=use_dbus,

2452

socketfd=socketfd)

2974

tcp_server = MandosServer(

2975

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

2976

ClientHandler,

2977

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

2978

use_ipv6=use_ipv6,

2979

gnutls_priority=server_settings["priority"],

2980

use_dbus=use_dbus,

2981

socketfd=socketfd)

2453

2982

if not foreground:

2454

2983

pidfilename = "/run/mandos.pid"

2455

2984

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

2456

2985

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

2457

2986

pidfile = None

2458

2987

try:

2459

pidfile = open(pidfilename, "w")

2988

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

2460

2989

except IOError as e:

2461

2990

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

2462

2991

exc_info=e)

2463

2464

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

2992

2993

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

2994

("mandos", "mandos"),

2995

("nobody", "nogroup")):

2465

2996

try:

2466

2997

uid = pwd.getpwnam(name).pw_uid

2467

gid = pwd.getpwnam(name).pw_gid

2998

gid = pwd.getpwnam(group).pw_gid

2468

2999

break

2469

3000

except KeyError:

2470

3001

continue

2474

3005

try:

2475

3006

os.setgid(gid)

2476

3007

os.setuid(uid)

3008

if debug:

3009

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

3010

gid))

2477

3011

except OSError as error:

3012

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

3013

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

2478

3014

if error.errno != errno.EPERM:

2479

3015

raise

2480

3016

2481

3017

if debug:

2482

3018

# Enable all possible GnuTLS debugging

2483

3019

2484

3020

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

2485

3021

# - GnuTLS manual

2486

gnutls.library.functions.gnutls_global_set_log_level(11)

2487

2488

@gnutls.library.types.gnutls_log_func

3022

gnutls.global_set_log_level(11)

3023

3024

@gnutls.log_func

2489

3025

def debug_gnutls(level, string):

2490

3026

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

2491

2492

(gnutls.library.functions

2493

.gnutls_global_set_log_function(debug_gnutls))

2494

3027

3028

gnutls.global_set_log_function(debug_gnutls)

3029

2495

3030

# Redirect stdin so all checkers get /dev/null

2496

3031

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

2497

3032

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

2498

3033

if null > 2:

2499

3034

os.close(null)

2500

3035

2501

3036

# Need to fork before connecting to D-Bus

2502

3037

if not foreground:

2503

3038

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

2504

3039

daemon()

2505

2506

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

2507

# need to inform gobject that threads will be used.

2508

gobject.threads_init()

2509

3040

3041

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

3042

# to inform GLib that threads will be used.

3043

GLib.threads_init()

3044

2510

3045

global main_loop

2511

3046

# From the Avahi example code

2512

3047

DBusGMainLoop(set_as_default=True)

2513

main_loop = gobject.MainLoop()

3048

main_loop = GLib.MainLoop()

2514

3049

bus = dbus.SystemBus()

2515

3050

# End of Avahi example code

2516

3051

if use_dbus:

2517

3052

try:

2518

3053

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

2519

bus, do_not_queue=True)

2520

old_bus_name = (dbus.service.BusName

2521

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

2522

do_not_queue=True))

2523

except dbus.exceptions.NameExistsException as e:

3054

bus,

3055

do_not_queue=True)

3056

old_bus_name = dbus.service.BusName(

3057

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

3058

do_not_queue=True)

3059

except dbus.exceptions.DBusException as e:

2524

3060

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

2525

3061

use_dbus = False

2526

3062

server_settings["use_dbus"] = False

2527

3063

tcp_server.use_dbus = False

2528

3064

if zeroconf:

2529

3065

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2530

service = AvahiServiceToSyslog(name =

2531

server_settings["servicename"],

2532

servicetype = "_mandos._tcp",

2533

protocol = protocol, bus = bus)

3066

service = AvahiServiceToSyslog(

3067

name=server_settings["servicename"],

3068

servicetype="_mandos._tcp",

3069

protocol=protocol,

3070

bus=bus)

2534

3071

if server_settings["interface"]:

2535

service.interface = (if_nametoindex

2536

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

2537

3072

service.interface = if_nametoindex(

3073

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

3074

2538

3075

global multiprocessing_manager

2539

3076

multiprocessing_manager = multiprocessing.Manager()

2540

3077

2541

3078

client_class = Client

2542

3079

if use_dbus:

2543

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

2544

3080

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

3081

2545

3082

client_settings = Client.config_parser(client_config)

2546

3083

old_client_settings = {}

2547

3084

clients_data = {}

2548

3085

2549

3086

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

2550

3087

global wnull

2551

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

3088

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

2552

3089

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

2553

3090

# mode

2554

3091

if debug or not foreground:

2555

3092

wnull.close()

2556

3093

2557

3094

# Get client data and settings from last running state.

2558

3095

if server_settings["restore"]:

2559

3096

try:

2560

3097

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

2561

clients_data, old_client_settings = (pickle.load

2562

(stored_state))

3098

if sys.version_info.major == 2:

3099

clients_data, old_client_settings = pickle.load(

3100

stored_state)

3101

else:

3102

bytes_clients_data, bytes_old_client_settings = (

3103

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

3104

# Fix bytes to strings

3105

# clients_data

3106

# .keys()

3107

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

3108

if isinstance(key, bytes)

3109

else key): value

3110

for key, value in

3111

bytes_clients_data.items()}

3112

del bytes_clients_data

3113

for key in clients_data:

3114

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

3115

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

3116

for k, v in

3117

clients_data[key].items()}

3118

clients_data[key] = value

3119

# .client_structure

3120

value["client_structure"] = [

3121

(s.decode("utf-8")

3122

if isinstance(s, bytes)

3123

else s) for s in

3124

value["client_structure"]]

3125

# .name & .host

3126

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

3127

if isinstance(value[k], bytes):

3128

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

3129

# old_client_settings

3130

# .keys()

3131

old_client_settings = {

3132

(key.decode("utf-8")

3133

if isinstance(key, bytes)

3134

else key): value

3135

for key, value in

3136

bytes_old_client_settings.items()}

3137

del bytes_old_client_settings

3138

# .host

3139

for value in old_client_settings.values():

3140

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

3141

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

3142

.decode("utf-8"))

2563

3143

os.remove(stored_state_path)

2564

3144

except IOError as e:

2565

3145

if e.errno == errno.ENOENT:

2566

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

2567

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

3146

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

3147

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

2568

3148

else:

2569

3149

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

2570

3150

exc_info=e)

2571

3151

raise

2572

3152

except EOFError as e:

2573

3153

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

2574

"EOFError:", exc_info=e)

2575

3154

"EOFError:",

3155

exc_info=e)

3156

2576

3157

with PGPEngine() as pgp:

2577

3158

for client_name, client in clients_data.items():

2578

3159

# Skip removed clients

2579

3160

if client_name not in client_settings:

2580

3161

continue

2581

3162

2582

3163

# Decide which value to use after restoring saved state.

2583

3164

# We have three different values: Old config file,

2584

3165

# new config file, and saved state.

2589

3170

# For each value in new config, check if it

2590

3171

# differs from the old config value (Except for

2591

3172

# the "secret" attribute)

2592

if (name != "secret" and

2593

value != old_client_settings[client_name]

2594

[name]):

3173

if (name != "secret"

3174

and (value !=

3175

old_client_settings[client_name][name])):

2595

3176

client[name] = value

2596

3177

except KeyError:

2597

3178

pass

2598

3179

2599

3180

# Clients who has passed its expire date can still be

2600

# enabled if its last checker was successful. Clients

3181

# enabled if its last checker was successful. A Client

2601

3182

# whose checker succeeded before we stored its state is

2602

3183

# assumed to have successfully run all checkers during

2603

3184

# downtime.

2606

3187

if not client["last_checked_ok"]:

2607

3188

logger.warning(

2608

3189

"disabling client {} - Client never "

2609

"performed a successful checker"

2610

.format(client_name))

3190

"performed a successful checker".format(

3191

client_name))

2611

3192

client["enabled"] = False

2612

3193

elif client["last_checker_status"] != 0:

2613

3194

logger.warning(

2614

3195

"disabling client {} - Client last"

2615

" checker failed with error code {}"

2616

.format(client_name,

2617

client["last_checker_status"]))

3196

" checker failed with error code"

3197

" {}".format(

3198

client_name,

3199

client["last_checker_status"]))

2618

3200

client["enabled"] = False

2619

3201

else:

2620

client["expires"] = (datetime.datetime

2621

.utcnow()

2622

+ client["timeout"])

3202

client["expires"] = (

3203

datetime.datetime.utcnow()

3204

+ client["timeout"])

2623

3205

logger.debug("Last checker succeeded,"

2624

" keeping {} enabled"

2625

.format(client_name))

3206

" keeping {} enabled".format(

3207

client_name))

2626

3208

try:

2627

client["secret"] = (

2628

pgp.decrypt(client["encrypted_secret"],

2629

client_settings[client_name]

2630

["secret"]))

3209

client["secret"] = pgp.decrypt(

3210

client["encrypted_secret"],

3211

client_settings[client_name]["secret"])

2631

3212

except PGPError:

2632

3213

# If decryption fails, we use secret from new settings

2633

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

2634

.format(client_name))

2635

client["secret"] = (

2636

client_settings[client_name]["secret"])

2637

3214

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

3215

client_name))

3216

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

3217

["secret"])

3218

2638

3219

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

2639

3220

for client_name in (set(old_client_settings)

2640

3221

- set(client_settings)):

2642

3223

for client_name in (set(client_settings)

2643

3224

- set(old_client_settings)):

2644

3225

clients_data[client_name] = client_settings[client_name]

2645

3226

2646

3227

# Create all client objects

2647

3228

for client_name, client in clients_data.items():

2648

3229

tcp_server.clients[client_name] = client_class(

2649

name = client_name, settings = client,

2650

server_settings = server_settings)

2651

3230

name=client_name,

3231

settings=client,

3232

server_settings=server_settings)

3233

2652

3234

if not tcp_server.clients:

2653

3235

logger.warning("No clients defined")

2654

3236

2655

3237

if not foreground:

2656

3238

if pidfile is not None:

3239

pid = os.getpid()

2657

3240

try:

2658

3241

with pidfile:

2659

pid = os.getpid()

2660

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

3242

print(pid, file=pidfile)

2661

3243

except IOError:

2662

3244

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

2663

3245

pidfilename, pid)

2664

3246

del pidfile

2665

3247

del pidfilename

2666

2667

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

2668

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

2669

3248

3249

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

3250

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3251

lambda: main_loop.quit() and False)

3252

2670

3253

if use_dbus:

2671

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

2672

"se.bsnet.fukt.Mandos"})

2673

class MandosDBusService(DBusObjectWithProperties):

3254

3255

@alternate_dbus_interfaces(

3256

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

3257

class MandosDBusService(DBusObjectWithObjectManager):

2674

3258

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

3259

2675

3260

def __init__(self):

2676

3261

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

3262

2677

3263

_interface = "se.recompile.Mandos"

2678

2679

@dbus_interface_annotations(_interface)

2680

def _foo(self):

2681

return { "org.freedesktop.DBus.Property"

2682

".EmitsChangedSignal":

2683

"false"}

2684

3264

2685

3265

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

2686

3266

def ClientAdded(self, objpath):

2687

3267

"D-Bus signal"

2688

3268

pass

2689

3269

2690

3270

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

2691

3271

def ClientNotFound(self, fingerprint, address):

2692

3272

"D-Bus signal"

2693

3273

pass

2694

3274

3275

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

3276

"true"})

2695

3277

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

2696

3278

def ClientRemoved(self, objpath, name):

2697

3279

"D-Bus signal"

2698

3280

pass

2699

3281

3282

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

3283

"true"})

2700

3284

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

2701

3285

def GetAllClients(self):

2702

3286

"D-Bus method"

2703

return dbus.Array(c.dbus_object_path

2704

for c in

2705

tcp_server.clients.itervalues())

2706

3287

return dbus.Array(c.dbus_object_path for c in

3288

tcp_server.clients.values())

3289

3290

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

3291

"true"})

2707

3292

@dbus.service.method(_interface,

2708

3293

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

2709

3294

def GetAllClientsWithProperties(self):

2710

3295

"D-Bus method"

2711

3296

return dbus.Dictionary(

2712

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

2713

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

3297

{c.dbus_object_path: c.GetAll(

3298

"se.recompile.Mandos.Client")

3299

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

2714

3300

signature="oa{sv}")

2715

3301

2716

3302

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

2717

3303

def RemoveClient(self, object_path):

2718

3304

"D-Bus method"

2719

for c in tcp_server.clients.itervalues():

3305

for c in tcp_server.clients.values():

2720

3306

if c.dbus_object_path == object_path:

2721

3307

del tcp_server.clients[c.name]

2722

3308

c.remove_from_connection()

2723

# Don't signal anything except ClientRemoved

3309

# Don't signal the disabling

2724

3310

c.disable(quiet=True)

2725

# Emit D-Bus signal

2726

self.ClientRemoved(object_path, c.name)

3311

# Emit D-Bus signal for removal

3312

self.client_removed_signal(c)

2727

3313

return

2728

3314

raise KeyError(object_path)

2729

3315

2730

3316

del _interface

2731

3317

3318

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3319

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

3320

def GetManagedObjects(self):

3321

"""D-Bus method"""

3322

return dbus.Dictionary(

3323

{client.dbus_object_path:

3324

dbus.Dictionary(

3325

{interface: client.GetAll(interface)

3326

for interface in

3327

client._get_all_interface_names()})

3328

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

3329

3330

def client_added_signal(self, client):

3331

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

3332

if use_dbus:

3333

# New standard signal

3334

self.InterfacesAdded(

3335

client.dbus_object_path,

3336

dbus.Dictionary(

3337

{interface: client.GetAll(interface)

3338

for interface in

3339

client._get_all_interface_names()}))

3340

# Old signal

3341

self.ClientAdded(client.dbus_object_path)

3342

3343

def client_removed_signal(self, client):

3344

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

3345

if use_dbus:

3346

# New standard signal

3347

self.InterfacesRemoved(

3348

client.dbus_object_path,

3349

client._get_all_interface_names())

3350

# Old signal

3351

self.ClientRemoved(client.dbus_object_path,

3352

client.name)

3353

2732

3354

mandos_dbus_service = MandosDBusService()

2733

3355

3356

# Save modules to variables to exempt the modules from being

3357

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

3358

mp = multiprocessing

3359

wn = wnull

3360

2734

3361

def cleanup():

2735

3362

"Cleanup function; run on exit"

2736

3363

if zeroconf:

2737

3364

service.cleanup()

2738

2739

multiprocessing.active_children()

2740

wnull.close()

3365

3366

mp.active_children()

3367

wn.close()

2741

3368

if not (tcp_server.clients or client_settings):

2742

3369

return

2743

3370

2744

3371

# Store client before exiting. Secrets are encrypted with key

2745

3372

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

2746

3373

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

2747

3374

clients = {}

2748

3375

with PGPEngine() as pgp:

2749

for client in tcp_server.clients.itervalues():

3376

for client in tcp_server.clients.values():

2750

3377

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

2751

3378

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

2752

3379

key)

2753

3380

client_dict = {}

2754

3381

2755

3382

# A list of attributes that can not be pickled

2756

3383

# + secret.

2757

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

2758

"checker", "server_settings" }

2759

for name, typ in (inspect.getmembers

2760

(dbus.service.Object)):

3384

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

3385

"checker", "server_settings"}

3386

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

3387

.Object):

2761

3388

exclude.add(name)

2762

3389

2763

3390

client_dict["encrypted_secret"] = (client

2764

3391

.encrypted_secret)

2765

3392

for attr in client.client_structure:

2766

3393

if attr not in exclude:

2767

3394

client_dict[attr] = getattr(client, attr)

2768

3395

2769

3396

clients[client.name] = client_dict

2770

3397

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

2771

3398

2772

3399

try:

2773

with (tempfile.NamedTemporaryFile

2774

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

2775

dir=os.path.dirname(stored_state_path),

2776

delete=False)) as stored_state:

2777

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

2778

tempname=stored_state.name

3400

with tempfile.NamedTemporaryFile(

3401

mode='wb',

3402

suffix=".pickle",

3403

prefix='clients-',

3404

dir=os.path.dirname(stored_state_path),

3405

delete=False) as stored_state:

3406

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

3407

protocol=2)

3408

tempname = stored_state.name

2779

3409

os.rename(tempname, stored_state_path)

2780

3410

except (IOError, OSError) as e:

2781

3411

if not debug:

2790

3420

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

2791

3421

exc_info=e)

2792

3422

raise

2793

3423

2794

3424

# Delete all clients, and settings from config

2795

3425

while tcp_server.clients:

2796

3426

name, client = tcp_server.clients.popitem()

2797

3427

if use_dbus:

2798

3428

client.remove_from_connection()

2799

# Don't signal anything except ClientRemoved

3429

# Don't signal the disabling

2800

3430

client.disable(quiet=True)

3431

# Emit D-Bus signal for removal

2801

3432

if use_dbus:

2802

# Emit D-Bus signal

2803

mandos_dbus_service.ClientRemoved(client

2804

.dbus_object_path,

2805

client.name)

3433

mandos_dbus_service.client_removed_signal(client)

2806

3434

client_settings.clear()

2807

3435

2808

3436

atexit.register(cleanup)

2809

2810

for client in tcp_server.clients.itervalues():

3437

3438

for client in tcp_server.clients.values():

2811

3439

if use_dbus:

2812

# Emit D-Bus signal

2813

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3440

# Emit D-Bus signal for adding

3441

mandos_dbus_service.client_added_signal(client)

2814

3442

# Need to initiate checking of clients

2815

3443

if client.enabled:

2816

3444

client.init_checker()

2817

3445

2818

3446

tcp_server.enable()

2819

3447

tcp_server.server_activate()

2820

3448

2821

3449

# Find out what port we got

2822

3450

if zeroconf:

2823

3451

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

2828

3456

else: # IPv4

2829

3457

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

2830

3458

*tcp_server.socket.getsockname())

2831

2832

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

2833

3459

3460

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

3461

2834

3462

try:

2835

3463

if zeroconf:

2836

3464

# From the Avahi example code

2841

3469

cleanup()

2842

3470

sys.exit(1)

2843

3471

# End of Avahi example code

2844

2845

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

2846

lambda *args, **kwargs:

2847

(tcp_server.handle_request

2848

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

2849

3472

3473

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

3474

lambda *args, **kwargs:

3475

(tcp_server.handle_request

3476

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

3477

2850

3478

logger.debug("Starting main loop")

2851

3479

main_loop.run()

2852

3480

except AvahiError as error:

2861

3489

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

2862

3490

cleanup()

2863

3491

3492

2864

3493

if __name__ == '__main__':

2865

3494

main()