/mandos/release : revision 237.7.699

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#!/usr/bin/python

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

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#

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#

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

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#

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#

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

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# service publisher, downloaded from

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

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

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

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

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#

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#

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# Everything else is

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#

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

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

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#

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# This file is part of Mandos.

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#

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

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

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

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# (at your option) any later version.

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#

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

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

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

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# WITHOUT ANY WARRANTY; without even the implied warranty of

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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# GNU General Public License for more details.

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#

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#

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

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# along with this program. If not, see

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

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#

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

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#

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

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#

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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try:

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from future_builtins import *

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except ImportError:

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pass

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import SocketServer as socketserver

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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import cPickle as pickle

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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import gobject

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import avahi

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import gi

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from gi.repository import GLib

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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# 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 = "1.6.1"

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

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# Try running the C preprocessor:

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try:

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

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"/dev/stdin"],

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE)

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stdout = cc.communicate(

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

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

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except (OSError, ValueError, IndexError):

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# No value found

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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if sys.version_info < (3, 2):

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configparser.Configparser = configparser.SafeConfigParser

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version = "1.8.6"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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

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

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return interface_index

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def copy_function(func):

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

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility=logging.handlers.SysLogHandler.LOG_DAEMON,

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address="/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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class PGPEngine(object):

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

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def __init__(self):

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

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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'--quiet']

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

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

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

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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topdown=False):

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for filename in files:

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

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for dirname in dirs:

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir=self.tempdir

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) as passfile:

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir = self.tempdir

204

) as passfile:

264

with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

212

stdout = subprocess.PIPE,

213

stderr = subprocess.PIPE)

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decrypted_plaintext, err = proc.communicate(input

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= data)

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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280

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# Pretend that we have an Avahi module

282

class avahi(object):

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

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

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

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

290

DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

291

DBUS_PATH_SERVER = "/"

292

293

@staticmethod

294

def string_array_to_txt_array(t):

295

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

296

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

297

ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

299

ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

300

SERVER_INVALID = 0 # avahi-common/defs.h

301

SERVER_REGISTERING = 1 # avahi-common/defs.h

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SERVER_RUNNING = 2 # avahi-common/defs.h

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SERVER_COLLISION = 3 # avahi-common/defs.h

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SERVER_FAILURE = 4 # avahi-common/defs.h

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306

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class AvahiError(Exception):

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

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self.value = value

224

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

225

def __unicode__(self):

226

return unicode(repr(self.value))

310

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

311

**kwargs)

312

227

313

228

314

class AvahiServiceError(AvahiError):

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pass

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317

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class AvahiGroupError(AvahiError):

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pass

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234

321

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class AvahiService(object):

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"""An Avahi (Zeroconf) service.

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324

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Attributes:

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

240

327

Used to optionally bind to the specified interface.

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339

server: D-Bus Server

253

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bus: dbus.SystemBus()

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"""

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

257

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

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

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protocol = avahi.PROTO_UNSPEC, bus = None):

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343

def __init__(self,

344

interface=avahi.IF_UNSPEC,

345

name=None,

346

servicetype=None,

347

port=None,

348

TXT=None,

349

domain="",

350

host="",

351

max_renames=32768,

352

protocol=avahi.PROTO_UNSPEC,

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bus=None):

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354

self.interface = interface

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355

self.name = name

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356

self.type = servicetype

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365

self.server = None

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366

self.bus = bus

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367

self.entry_group_state_changed_match = None

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275

def rename(self):

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369

def rename(self, remove=True):

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

277

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if self.rename_count >= self.max_renames:

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

279

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" after %i retries, exiting.",

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self.rename_count)

281

375

raise AvahiServiceError("Too many renames")

282

self.name = unicode(self.server

283

.GetAlternativeServiceName(self.name))

376

self.name = str(

377

self.server.GetAlternativeServiceName(self.name))

378

self.rename_count += 1

284

379

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

285

380

self.name)

286

self.remove()

381

if remove:

382

self.remove()

287

383

try:

288

384

self.add()

289

385

except dbus.exceptions.DBusException as error:

290

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

291

self.cleanup()

292

os._exit(1)

293

self.rename_count += 1

294

386

if (error.get_dbus_name()

387

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

388

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

389

return self.rename(remove=False)

390

else:

391

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

392

self.cleanup()

393

os._exit(1)

394

295

395

def remove(self):

296

396

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

297

397

if self.entry_group_state_changed_match is not None:

299

399

self.entry_group_state_changed_match = None

300

400

if self.group is not None:

301

401

self.group.Reset()

302

402

303

403

def add(self):

304

404

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

305

405

self.remove()

322

422

dbus.UInt16(self.port),

323

423

avahi.string_array_to_txt_array(self.TXT))

324

424

self.group.Commit()

325

425

326

426

def entry_group_state_changed(self, state, error):

327

427

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

328

428

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

329

429

330

430

if state == avahi.ENTRY_GROUP_ESTABLISHED:

331

431

logger.debug("Zeroconf service established.")

332

432

elif state == avahi.ENTRY_GROUP_COLLISION:

334

434

self.rename()

335

435

elif state == avahi.ENTRY_GROUP_FAILURE:

336

436

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

337

unicode(error))

338

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

339

.format(error))

340

437

str(error))

438

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

439

341

440

def cleanup(self):

342

441

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

343

442

if self.group is not None:

348

447

pass

349

448

self.group = None

350

449

self.remove()

351

450

352

451

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

353

452

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

354

453

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

355

bad_states = { avahi.SERVER_INVALID:

356

"Zeroconf server invalid",

357

avahi.SERVER_REGISTERING: None,

358

avahi.SERVER_COLLISION:

359

"Zeroconf server name collision",

360

avahi.SERVER_FAILURE:

361

"Zeroconf server failure" }

454

bad_states = {

455

avahi.SERVER_INVALID: "Zeroconf server invalid",

456

avahi.SERVER_REGISTERING: None,

457

avahi.SERVER_COLLISION: "Zeroconf server name collision",

458

avahi.SERVER_FAILURE: "Zeroconf server failure",

459

}

362

460

if state in bad_states:

363

461

if bad_states[state] is not None:

364

462

if error is None:

367

465

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

368

466

self.cleanup()

369

467

elif state == avahi.SERVER_RUNNING:

370

self.add()

468

try:

469

self.add()

470

except dbus.exceptions.DBusException as error:

471

if (error.get_dbus_name()

472

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

473

logger.info("Local Zeroconf service name"

474

" collision.")

475

return self.rename(remove=False)

476

else:

477

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

478

self.cleanup()

479

os._exit(1)

371

480

else:

372

481

if error is None:

373

482

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

374

483

else:

375

484

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

376

485

377

486

def activate(self):

378

487

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

379

488

if self.server is None:

383

492

follow_name_owner_changes=True),

384

493

avahi.DBUS_INTERFACE_SERVER)

385

494

self.server.connect_to_signal("StateChanged",

386

self.server_state_changed)

495

self.server_state_changed)

387

496

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

388

497

389

498

390

499

class AvahiServiceToSyslog(AvahiService):

391

def rename(self):

500

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

392

501

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

393

ret = AvahiService.rename(self)

394

syslogger.setFormatter(logging.Formatter

395

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

396

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

397

.format(self.name)))

502

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

503

syslogger.setFormatter(logging.Formatter(

504

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

505

.format(self.name)))

398

506

return ret

399

507

400

508

401

def timedelta_to_milliseconds(td):

402

"Convert a datetime.timedelta() to milliseconds"

403

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

404

+ (td.seconds * 1000)

405

+ (td.microseconds // 1000))

509

# Pretend that we have a GnuTLS module

510

class gnutls(object):

511

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

512

513

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

514

if library is None:

515

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

516

_library = ctypes.cdll.LoadLibrary(library)

517

del library

518

519

# Unless otherwise indicated, the constants and types below are

520

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

521

522

# Constants

523

E_SUCCESS = 0

524

E_INTERRUPTED = -52

525

E_AGAIN = -28

526

CRT_OPENPGP = 2

527

CRT_RAWPK = 3

528

CLIENT = 2

529

SHUT_RDWR = 0

530

CRD_CERTIFICATE = 1

531

E_NO_CERTIFICATE_FOUND = -49

532

X509_FMT_DER = 0

533

NO_TICKETS = 1<<10

534

ENABLE_RAWPK = 1<<18

535

CTYPE_PEERS = 3

536

KEYID_USE_SHA256 = 1 # gnutls/x509.h

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

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

566

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

567

# code is passed, convert it to a string with

568

# gnutls.strerror()

569

self.code = code

570

if message is None and code is not None:

571

message = gnutls.strerror(code)

572

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

573

message, *args)

574

575

class CertificateSecurityError(Error):

576

pass

577

578

# Classes

579

class Credentials(object):

580

def __init__(self):

581

self._c_object = gnutls.certificate_credentials_t()

582

gnutls.certificate_allocate_credentials(

583

ctypes.byref(self._c_object))

584

self.type = gnutls.CRD_CERTIFICATE

585

586

def __del__(self):

587

gnutls.certificate_free_credentials(self._c_object)

588

589

class ClientSession(object):

590

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

591

self._c_object = gnutls.session_t()

592

gnutls_flags = gnutls.CLIENT

593

if gnutls.check_version(b"3.5.6"):

594

gnutls_flags |= gnutls.NO_TICKETS

595

if gnutls.has_rawpk:

596

gnutls_flags |= gnutls.ENABLE_RAWPK

597

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

598

del gnutls_flags

599

gnutls.set_default_priority(self._c_object)

600

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

601

gnutls.handshake_set_private_extensions(self._c_object,

602

True)

603

self.socket = socket

604

if credentials is None:

605

credentials = gnutls.Credentials()

606

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

607

ctypes.cast(credentials._c_object,

608

ctypes.c_void_p))

609

self.credentials = credentials

610

611

def __del__(self):

612

gnutls.deinit(self._c_object)

613

614

def handshake(self):

615

return gnutls.handshake(self._c_object)

616

617

def send(self, data):

618

data = bytes(data)

619

data_len = len(data)

620

while data_len > 0:

621

data_len -= gnutls.record_send(self._c_object,

622

data[-data_len:],

623

data_len)

624

625

def bye(self):

626

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

627

628

# Error handling functions

629

def _error_code(result):

630

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

631

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

632

if result >= 0:

633

return result

634

if result == gnutls.E_NO_CERTIFICATE_FOUND:

635

raise gnutls.CertificateSecurityError(code=result)

636

raise gnutls.Error(code=result)

637

638

def _retry_on_error(result, func, arguments):

639

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

640

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

641

while result < 0:

642

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

643

return _error_code(result)

644

result = func(*arguments)

645

return result

646

647

# Unless otherwise indicated, the function declarations below are

648

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

649

650

# Functions

651

priority_set_direct = _library.gnutls_priority_set_direct

652

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

653

ctypes.POINTER(ctypes.c_char_p)]

654

priority_set_direct.restype = _error_code

655

656

init = _library.gnutls_init

657

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

658

init.restype = _error_code

659

660

set_default_priority = _library.gnutls_set_default_priority

661

set_default_priority.argtypes = [session_t]

662

set_default_priority.restype = _error_code

663

664

record_send = _library.gnutls_record_send

665

record_send.argtypes = [session_t, ctypes.c_void_p,

666

ctypes.c_size_t]

667

record_send.restype = ctypes.c_ssize_t

668

record_send.errcheck = _retry_on_error

669

670

certificate_allocate_credentials = (

671

_library.gnutls_certificate_allocate_credentials)

672

certificate_allocate_credentials.argtypes = [

673

ctypes.POINTER(certificate_credentials_t)]

674

certificate_allocate_credentials.restype = _error_code

675

676

certificate_free_credentials = (

677

_library.gnutls_certificate_free_credentials)

678

certificate_free_credentials.argtypes = [

679

certificate_credentials_t]

680

certificate_free_credentials.restype = None

681

682

handshake_set_private_extensions = (

683

_library.gnutls_handshake_set_private_extensions)

684

handshake_set_private_extensions.argtypes = [session_t,

685

ctypes.c_int]

686

handshake_set_private_extensions.restype = None

687

688

credentials_set = _library.gnutls_credentials_set

689

credentials_set.argtypes = [session_t, credentials_type_t,

690

ctypes.c_void_p]

691

credentials_set.restype = _error_code

692

693

strerror = _library.gnutls_strerror

694

strerror.argtypes = [ctypes.c_int]

695

strerror.restype = ctypes.c_char_p

696

697

certificate_type_get = _library.gnutls_certificate_type_get

698

certificate_type_get.argtypes = [session_t]

699

certificate_type_get.restype = _error_code

700

701

certificate_get_peers = _library.gnutls_certificate_get_peers

702

certificate_get_peers.argtypes = [session_t,

703

ctypes.POINTER(ctypes.c_uint)]

704

certificate_get_peers.restype = ctypes.POINTER(datum_t)

705

706

global_set_log_level = _library.gnutls_global_set_log_level

707

global_set_log_level.argtypes = [ctypes.c_int]

708

global_set_log_level.restype = None

709

710

global_set_log_function = _library.gnutls_global_set_log_function

711

global_set_log_function.argtypes = [log_func]

712

global_set_log_function.restype = None

713

714

deinit = _library.gnutls_deinit

715

deinit.argtypes = [session_t]

716

deinit.restype = None

717

718

handshake = _library.gnutls_handshake

719

handshake.argtypes = [session_t]

720

handshake.restype = _error_code

721

handshake.errcheck = _retry_on_error

722

723

transport_set_ptr = _library.gnutls_transport_set_ptr

724

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

725

transport_set_ptr.restype = None

726

727

bye = _library.gnutls_bye

728

bye.argtypes = [session_t, close_request_t]

729

bye.restype = _error_code

730

bye.errcheck = _retry_on_error

731

732

check_version = _library.gnutls_check_version

733

check_version.argtypes = [ctypes.c_char_p]

734

check_version.restype = ctypes.c_char_p

735

736

_need_version = b"3.3.0"

737

if check_version(_need_version) is None:

738

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

739

.format(_need_version))

740

741

_tls_rawpk_version = b"3.6.6"

742

has_rawpk = bool(check_version(_tls_rawpk_version))

743

744

if has_rawpk:

745

# Types

746

class pubkey_st(ctypes.Structure):

747

_fields = []

748

pubkey_t = ctypes.POINTER(pubkey_st)

749

750

x509_crt_fmt_t = ctypes.c_int

751

752

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

753

pubkey_init = _library.gnutls_pubkey_init

754

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

755

pubkey_init.restype = _error_code

756

757

pubkey_import = _library.gnutls_pubkey_import

758

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

759

x509_crt_fmt_t]

760

pubkey_import.restype = _error_code

761

762

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

763

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

764

ctypes.POINTER(ctypes.c_ubyte),

765

ctypes.POINTER(ctypes.c_size_t)]

766

pubkey_get_key_id.restype = _error_code

767

768

pubkey_deinit = _library.gnutls_pubkey_deinit

769

pubkey_deinit.argtypes = [pubkey_t]

770

pubkey_deinit.restype = None

771

else:

772

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

773

774

openpgp_crt_init = _library.gnutls_openpgp_crt_init

775

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

776

openpgp_crt_init.restype = _error_code

777

778

openpgp_crt_import = _library.gnutls_openpgp_crt_import

779

openpgp_crt_import.argtypes = [openpgp_crt_t,

780

ctypes.POINTER(datum_t),

781

openpgp_crt_fmt_t]

782

openpgp_crt_import.restype = _error_code

783

784

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

785

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

786

ctypes.POINTER(ctypes.c_uint)]

787

openpgp_crt_verify_self.restype = _error_code

788

789

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

790

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

791

openpgp_crt_deinit.restype = None

792

793

openpgp_crt_get_fingerprint = (

794

_library.gnutls_openpgp_crt_get_fingerprint)

795

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

796

ctypes.c_void_p,

797

ctypes.POINTER(

798

ctypes.c_size_t)]

799

openpgp_crt_get_fingerprint.restype = _error_code

800

801

if check_version(b"3.6.4"):

802

certificate_type_get2 = _library.gnutls_certificate_type_get2

803

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

804

certificate_type_get2.restype = _error_code

805

806

# Remove non-public functions

807

del _error_code, _retry_on_error

808

809

810

def call_pipe(connection, # : multiprocessing.Connection

811

func, *args, **kwargs):

812

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

813

814

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

815

return value on the provided multiprocessing.Connection.

816

"""

817

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

818

connection.close()

406

819

407

820

408

821

class Client(object):

409

822

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

410

823

411

824

Attributes:

412

825

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

413

826

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

414

827

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

415

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

416

to see if the client lives.

417

'None' if no process is running.

418

checker_callback_tag: a gobject event source tag, or None

828

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

829

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

830

running.

831

checker_callback_tag: a GLib event source tag, or None

419

832

checker_command: string; External command which is run to check

420

833

if client lives. %() expansions are done at

421

834

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

422

835

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

423

checker_initiator_tag: a gobject event source tag, or None

836

checker_initiator_tag: a GLib event source tag, or None

424

837

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

425

838

client_structure: Object describing what attributes a client has

426

839

and is used for storing the client at exit

427

840

current_checker_command: string; current running checker_command

428

disable_initiator_tag: a gobject event source tag, or None

841

disable_initiator_tag: a GLib event source tag, or None

429

842

enabled: bool()

430

843

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

431

uniquely identify the client

844

uniquely identify an OpenPGP client

845

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

846

a client using raw public keys

432

847

host: string; available for use by the checker command

433

848

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

434

849

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

436

851

last_checker_status: integer between 0 and 255 reflecting exit

437

852

status of last checker. -1 reflects crashed

438

853

checker, -2 means no checker completed yet.

854

last_checker_signal: The signal which killed the last checker, if

855

last_checker_status is -1

439

856

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

440

857

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

441

858

D-Bus identifiers

448

865

disabled, or None

449

866

server_settings: The server_settings dict from main()

450

867

"""

451

868

452

869

runtime_expansions = ("approval_delay", "approval_duration",

453

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

870

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

454

871

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

455

872

"last_approval_request", "last_checked_ok",

456

873

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

457

client_defaults = { "timeout": "PT5M",

458

"extended_timeout": "PT15M",

459

"interval": "PT2M",

460

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

461

"host": "",

462

"approval_delay": "PT0S",

463

"approval_duration": "PT1S",

464

"approved_by_default": "True",

465

"enabled": "True",

466

}

467

468

def timeout_milliseconds(self):

469

"Return the 'timeout' attribute in milliseconds"

470

return timedelta_to_milliseconds(self.timeout)

471

472

def extended_timeout_milliseconds(self):

473

"Return the 'extended_timeout' attribute in milliseconds"

474

return timedelta_to_milliseconds(self.extended_timeout)

475

476

def interval_milliseconds(self):

477

"Return the 'interval' attribute in milliseconds"

478

return timedelta_to_milliseconds(self.interval)

479

480

def approval_delay_milliseconds(self):

481

return timedelta_to_milliseconds(self.approval_delay)

482

874

client_defaults = {

875

"timeout": "PT5M",

876

"extended_timeout": "PT15M",

877

"interval": "PT2M",

878

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

879

"host": "",

880

"approval_delay": "PT0S",

881

"approval_duration": "PT1S",

882

"approved_by_default": "True",

883

"enabled": "True",

884

}

885

483

886

@staticmethod

484

887

def config_parser(config):

485

888

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

492

895

for client_name in config.sections():

493

896

section = dict(config.items(client_name))

494

897

client = settings[client_name] = {}

495

898

496

899

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

497

900

# Reformat values from string types to Python types

498

901

client["approved_by_default"] = config.getboolean(

499

902

client_name, "approved_by_default")

500

903

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

501

904

"enabled")

502

905

906

# Uppercase and remove spaces from key_id and fingerprint

907

# for later comparison purposes with return value from the

908

# key_id() and fingerprint() functions

909

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

910

.replace(" ", ""))

503

911

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

504

912

.replace(" ", ""))

505

913

if "secret" in section:

506

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

914

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

915

.encode("utf-8"),

916

"base64")

507

917

elif "secfile" in section:

508

918

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

509

919

(section["secfile"])),

510

920

"rb") as secfile:

511

921

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

512

922

else:

513

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

923

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

514

924

.format(section))

515

925

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

516

926

client["extended_timeout"] = string_to_delta(

524

934

client["last_approval_request"] = None

525

935

client["last_checked_ok"] = None

526

936

client["last_checker_status"] = -2

527

937

528

938

return settings

529

530

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

939

940

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

531

941

self.name = name

532

942

if server_settings is None:

533

943

server_settings = {}

534

944

self.server_settings = server_settings

535

945

# adding all client settings

536

for setting, value in settings.iteritems():

946

for setting, value in settings.items():

537

947

setattr(self, setting, value)

538

948

539

949

if self.enabled:

540

950

if not hasattr(self, "last_enabled"):

541

951

self.last_enabled = datetime.datetime.utcnow()

545

955

else:

546

956

self.last_enabled = None

547

957

self.expires = None

548

958

549

959

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

550

# Uppercase and remove spaces from fingerprint for later

551

# comparison purposes with return value from the fingerprint()

552

# function

960

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

553

961

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

554

962

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

555

963

datetime.datetime.utcnow())

556

964

557

965

# attributes specific for this server instance

558

966

self.checker = None

559

967

self.checker_initiator_tag = None

562

970

self.current_checker_command = None

563

971

self.approved = None

564

972

self.approvals_pending = 0

565

self.changedstate = (multiprocessing_manager

566

.Condition(multiprocessing_manager

567

.Lock()))

568

self.client_structure = [attr for attr in

569

self.__dict__.iterkeys()

973

self.changedstate = multiprocessing_manager.Condition(

974

multiprocessing_manager.Lock())

975

self.client_structure = [attr

976

for attr in self.__dict__.keys()

570

977

if not attr.startswith("_")]

571

978

self.client_structure.append("client_structure")

572

573

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

574

lambda obj:

575

isinstance(obj,

576

property)):

979

980

for name, t in inspect.getmembers(

981

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

577

982

if not name.startswith("_"):

578

983

self.client_structure.append(name)

579

984

580

985

# Send notice to process children that client state has changed

581

986

def send_changedstate(self):

582

987

with self.changedstate:

583

988

self.changedstate.notify_all()

584

989

585

990

def enable(self):

586

991

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

587

992

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

592

997

self.last_enabled = datetime.datetime.utcnow()

593

998

self.init_checker()

594

999

self.send_changedstate()

595

1000

596

1001

def disable(self, quiet=True):

597

1002

"""Disable this client."""

598

1003

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

600

1005

if not quiet:

601

1006

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

602

1007

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

603

gobject.source_remove(self.disable_initiator_tag)

1008

GLib.source_remove(self.disable_initiator_tag)

604

1009

self.disable_initiator_tag = None

605

1010

self.expires = None

606

1011

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

607

gobject.source_remove(self.checker_initiator_tag)

1012

GLib.source_remove(self.checker_initiator_tag)

608

1013

self.checker_initiator_tag = None

609

1014

self.stop_checker()

610

1015

self.enabled = False

611

1016

if not quiet:

612

1017

self.send_changedstate()

613

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

1018

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

614

1019

return False

615

1020

616

1021

def __del__(self):

617

1022

self.disable()

618

1023

619

1024

def init_checker(self):

620

1025

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

621

1026

# and every interval from then on.

622

1027

if self.checker_initiator_tag is not None:

623

gobject.source_remove(self.checker_initiator_tag)

624

self.checker_initiator_tag = (gobject.timeout_add

625

(self.interval_milliseconds(),

626

self.start_checker))

1028

GLib.source_remove(self.checker_initiator_tag)

1029

self.checker_initiator_tag = GLib.timeout_add(

1030

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

1031

self.start_checker)

627

1032

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

628

1033

if self.disable_initiator_tag is not None:

629

gobject.source_remove(self.disable_initiator_tag)

630

self.disable_initiator_tag = (gobject.timeout_add

631

(self.timeout_milliseconds(),

632

self.disable))

1034

GLib.source_remove(self.disable_initiator_tag)

1035

self.disable_initiator_tag = GLib.timeout_add(

1036

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

633

1037

# Also start a new checker *right now*.

634

1038

self.start_checker()

635

636

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

1039

1040

def checker_callback(self, source, condition, connection,

1041

command):

637

1042

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

1043

# Read return code from connection (see call_pipe)

1044

returncode = connection.recv()

1045

connection.close()

1046

self.checker.join()

638

1047

self.checker_callback_tag = None

639

1048

self.checker = None

640

if os.WIFEXITED(condition):

641

self.last_checker_status = os.WEXITSTATUS(condition)

1049

1050

if returncode >= 0:

1051

self.last_checker_status = returncode

1052

self.last_checker_signal = None

642

1053

if self.last_checker_status == 0:

643

1054

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

644

1055

vars(self))

645

1056

self.checked_ok()

646

1057

else:

647

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

648

vars(self))

1058

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

649

1059

else:

650

1060

self.last_checker_status = -1

1061

self.last_checker_signal = -returncode

651

1062

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

652

1063

vars(self))

653

1064

return False

1065

654

1066

def checked_ok(self):

655

1067

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

656

1068

self.last_checked_ok = datetime.datetime.utcnow()

657

1069

self.last_checker_status = 0

1070

self.last_checker_signal = None

658

1071

self.bump_timeout()

659

1072

660

1073

def bump_timeout(self, timeout=None):

661

1074

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

662

1075

if timeout is None:

663

1076

timeout = self.timeout

664

1077

if self.disable_initiator_tag is not None:

665

gobject.source_remove(self.disable_initiator_tag)

1078

GLib.source_remove(self.disable_initiator_tag)

666

1079

self.disable_initiator_tag = None

667

1080

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

668

self.disable_initiator_tag = (gobject.timeout_add

669

(timedelta_to_milliseconds

670

(timeout), self.disable))

1081

self.disable_initiator_tag = GLib.timeout_add(

1082

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

671

1083

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

672

1084

673

1085

def need_approval(self):

674

1086

self.last_approval_request = datetime.datetime.utcnow()

675

1087

676

1088

def start_checker(self):

677

1089

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

678

1090

679

1091

If a checker already exists, leave it running and do

680

1092

nothing."""

681

1093

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

686

1098

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

687

1099

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

688

1100

# should be.

689

690

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

691

try:

692

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

693

except (AttributeError, OSError) as error:

694

if (isinstance(error, OSError)

695

and error.errno != errno.ECHILD):

696

raise error

697

else:

698

if pid:

699

logger.warning("Checker was a zombie")

700

gobject.source_remove(self.checker_callback_tag)

701

self.checker_callback(pid, status,

702

self.current_checker_command)

1101

1102

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

1103

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

1104

self.checker.join()

1105

self.checker = None

703

1106

# Start a new checker if needed

704

1107

if self.checker is None:

705

1108

# Escape attributes for the shell

706

escaped_attrs = dict(

707

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

708

for attr in

709

self.runtime_expansions)

1109

escaped_attrs = {

1110

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

1111

for attr in self.runtime_expansions}

710

1112

try:

711

1113

command = self.checker_command % escaped_attrs

712

1114

except TypeError as error:

713

1115

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

714

self.checker_command, exc_info=error)

715

return True # Try again later

1116

self.checker_command,

1117

exc_info=error)

1118

return True # Try again later

716

1119

self.current_checker_command = command

717

try:

718

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

719

command, self.name)

720

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

721

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

722

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

723

# always replaced by /dev/null.)

724

# The exception is when not debugging but nevertheless

725

# running in the foreground; use the previously

726

# created wnull.

727

popen_args = {}

728

if (not self.server_settings["debug"]

729

and self.server_settings["foreground"]):

730

popen_args.update({"stdout": wnull,

731

"stderr": wnull })

732

self.checker = subprocess.Popen(command,

733

close_fds=True,

734

shell=True, cwd="/",

735

**popen_args)

736

except OSError as error:

737

logger.error("Failed to start subprocess",

738

exc_info=error)

739

return True

740

self.checker_callback_tag = (gobject.child_watch_add

741

(self.checker.pid,

742

self.checker_callback,

743

data=command))

744

# The checker may have completed before the gobject

745

# watch was added. Check for this.

746

try:

747

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

748

except OSError as error:

749

if error.errno == errno.ECHILD:

750

# This should never happen

751

logger.error("Child process vanished",

752

exc_info=error)

753

return True

754

raise

755

if pid:

756

gobject.source_remove(self.checker_callback_tag)

757

self.checker_callback(pid, status, command)

758

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

1120

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

1121

self.name)

1122

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

1123

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

1124

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

1125

# always replaced by /dev/null.)

1126

# The exception is when not debugging but nevertheless

1127

# running in the foreground; use the previously

1128

# created wnull.

1129

popen_args = {"close_fds": True,

1130

"shell": True,

1131

"cwd": "/"}

1132

if (not self.server_settings["debug"]

1133

and self.server_settings["foreground"]):

1134

popen_args.update({"stdout": wnull,

1135

"stderr": wnull})

1136

pipe = multiprocessing.Pipe(duplex=False)

1137

self.checker = multiprocessing.Process(

1138

target=call_pipe,

1139

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

1140

kwargs=popen_args)

1141

self.checker.start()

1142

self.checker_callback_tag = GLib.io_add_watch(

1143

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

1144

self.checker_callback, pipe[0], command)

1145

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

759

1146

return True

760

1147

761

1148

def stop_checker(self):

762

1149

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

763

1150

if self.checker_callback_tag:

764

gobject.source_remove(self.checker_callback_tag)

1151

GLib.source_remove(self.checker_callback_tag)

765

1152

self.checker_callback_tag = None

766

1153

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

767

1154

return

768

1155

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

769

try:

770

self.checker.terminate()

771

#time.sleep(0.5)

772

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

773

# self.checker.kill()

774

except OSError as error:

775

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

776

raise

1156

self.checker.terminate()

777

1157

self.checker = None

778

1158

779

1159

780

def dbus_service_property(dbus_interface, signature="v",

781

access="readwrite", byte_arrays=False):

1160

def dbus_service_property(dbus_interface,

1161

signature="v",

1162

access="readwrite",

1163

byte_arrays=False):

782

1164

"""Decorators for marking methods of a DBusObjectWithProperties to

783

1165

become properties on the D-Bus.

784

1166

785

1167

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

786

1168

and with one argument by "Set".

787

1169

788

1170

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

789

1171

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

790

1172

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

793

1175

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

794

1176

if byte_arrays and signature != "ay":

795

1177

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

796

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

1178

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

1179

797

1180

def decorator(func):

798

1181

func._dbus_is_property = True

799

1182

func._dbus_interface = dbus_interface

802

1185

func._dbus_name = func.__name__

803

1186

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

804

1187

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

805

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1188

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

806

1189

return func

1190

807

1191

return decorator

808

1192

809

1193

810

1194

def dbus_interface_annotations(dbus_interface):

811

1195

"""Decorator for marking functions returning interface annotations

812

1196

813

1197

Usage:

814

1198

815

1199

@dbus_interface_annotations("org.example.Interface")

816

1200

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

817

1201

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

818

1202

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

819

1203

"false"}

820

1204

"""

1205

821

1206

def decorator(func):

822

1207

func._dbus_is_interface = True

823

1208

func._dbus_interface = dbus_interface

824

1209

func._dbus_name = dbus_interface

825

1210

return func

1211

826

1212

return decorator

827

1213

828

1214

829

1215

def dbus_annotations(annotations):

830

1216

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

831

1217

Usage:

832

1218

1219

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

1220

"org.freedesktop.DBus.Property."

1221

"EmitsChangedSignal": "false"})

833

1222

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

834

1223

access="r")

835

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

836

"org.freedesktop.DBus.Property."

837

"EmitsChangedSignal": "false"})

838

1224

def Property_dbus_property(self):

839

1225

return dbus.Boolean(False)

1226

1227

See also the DBusObjectWithAnnotations class.

840

1228

"""

1229

841

1230

def decorator(func):

842

1231

func._dbus_annotations = annotations

843

1232

return func

1233

844

1234

return decorator

845

1235

846

1236

847

1237

class DBusPropertyException(dbus.exceptions.DBusException):

848

1238

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

849

1239

"""

850

def __unicode__(self):

851

return unicode(str(self))

1240

pass

852

1241

853

1242

854

1243

class DBusPropertyAccessException(DBusPropertyException):

863

1252

pass

864

1253

865

1254

866

class DBusObjectWithProperties(dbus.service.Object):

867

"""A D-Bus object with properties.

868

869

Classes inheriting from this can use the dbus_service_property

870

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

871

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

1255

class DBusObjectWithAnnotations(dbus.service.Object):

1256

"""A D-Bus object with annotations.

1257

1258

Classes inheriting from this can use the dbus_annotations

1259

decorator to add annotations to methods or signals.

872

1260

"""

873

1261

874

1262

@staticmethod

875

1263

def _is_dbus_thing(thing):

876

1264

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

877

1265

878

1266

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

879

1267

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

880

1268

"""

881

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

1269

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

882

1270

False)

883

1271

884

1272

def _get_all_dbus_things(self, thing):

885

1273

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

886

1274

"""

887

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

888

name),

1275

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

889

1276

athing.__get__(self))

890

1277

for cls in self.__class__.__mro__

891

1278

for name, athing in

892

inspect.getmembers(cls,

893

self._is_dbus_thing(thing)))

894

1279

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

1280

1281

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1282

out_signature="s",

1283

path_keyword='object_path',

1284

connection_keyword='connection')

1285

def Introspect(self, object_path, connection):

1286

"""Overloading of standard D-Bus method.

1287

1288

Inserts annotation tags on methods and signals.

1289

"""

1290

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

1291

connection)

1292

try:

1293

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

1294

1295

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

1296

# Add annotation tags

1297

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

1298

for tag in if_tag.getElementsByTagName(typ):

1299

annots = dict()

1300

for name, prop in (self.

1301

_get_all_dbus_things(typ)):

1302

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

1303

and prop._dbus_interface

1304

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

1305

annots.update(getattr(

1306

prop, "_dbus_annotations", {}))

1307

for name, value in annots.items():

1308

ann_tag = document.createElement(

1309

"annotation")

1310

ann_tag.setAttribute("name", name)

1311

ann_tag.setAttribute("value", value)

1312

tag.appendChild(ann_tag)

1313

# Add interface annotation tags

1314

for annotation, value in dict(

1315

itertools.chain.from_iterable(

1316

annotations().items()

1317

for name, annotations

1318

in self._get_all_dbus_things("interface")

1319

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

1320

)).items():

1321

ann_tag = document.createElement("annotation")

1322

ann_tag.setAttribute("name", annotation)

1323

ann_tag.setAttribute("value", value)

1324

if_tag.appendChild(ann_tag)

1325

# Fix argument name for the Introspect method itself

1326

if (if_tag.getAttribute("name")

1327

== dbus.INTROSPECTABLE_IFACE):

1328

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

1329

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

1330

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

1331

if (arg.getAttribute("direction")

1332

== "out"):

1333

arg.setAttribute("name",

1334

"xml_data")

1335

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

1336

document.unlink()

1337

except (AttributeError, xml.dom.DOMException,

1338

xml.parsers.expat.ExpatError) as error:

1339

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

1340

exc_info=error)

1341

return xmlstring

1342

1343

1344

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1345

"""A D-Bus object with properties.

1346

1347

Classes inheriting from this can use the dbus_service_property

1348

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

1349

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

1350

"""

1351

895

1352

def _get_dbus_property(self, interface_name, property_name):

896

1353

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

897

1354

property with the specified name and interface.

898

1355

"""

899

for cls in self.__class__.__mro__:

900

for name, value in (inspect.getmembers

901

(cls,

902

self._is_dbus_thing("property"))):

1356

for cls in self.__class__.__mro__:

1357

for name, value in inspect.getmembers(

1358

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

903

1359

if (value._dbus_name == property_name

904

1360

and value._dbus_interface == interface_name):

905

1361

return value.__get__(self)

906

1362

907

1363

# No such property

908

raise DBusPropertyNotFound(self.dbus_object_path + ":"

909

+ interface_name + "."

910

+ property_name)

911

912

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

1364

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

1365

self.dbus_object_path, interface_name, property_name))

1366

1367

@classmethod

1368

def _get_all_interface_names(cls):

1369

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

1370

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

1371

"_dbus_interface", None)

1372

for x in (inspect.getmro(cls))

1373

for attr in dir(x))

1374

if name is not None)

1375

1376

@dbus.service.method(dbus.PROPERTIES_IFACE,

1377

in_signature="ss",

913

1378

out_signature="v")

914

1379

def Get(self, interface_name, property_name):

915

1380

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

921

1386

if not hasattr(value, "variant_level"):

922

1387

return value

923

1388

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

924

1389

925

1390

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

926

1391

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

927

1392

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

933

1398

# The byte_arrays option is not supported yet on

934

1399

# signatures other than "ay".

935

1400

if prop._dbus_signature != "ay":

936

raise ValueError

1401

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

1402

"'ay' signature {!r}"

1403

.format(prop._dbus_signature))

937

1404

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

938

1405

for byte in value))

939

1406

prop(value)

940

941

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

1407

1408

@dbus.service.method(dbus.PROPERTIES_IFACE,

1409

in_signature="s",

942

1410

out_signature="a{sv}")

943

1411

def GetAll(self, interface_name):

944

1412

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

945

1413

standard.

946

1414

947

1415

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

948

1416

"""

949

1417

properties = {}

959

1427

if not hasattr(value, "variant_level"):

960

1428

properties[name] = value

961

1429

continue

962

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

963

value.variant_level+1)

1430

properties[name] = type(value)(

1431

value, variant_level=value.variant_level + 1)

964

1432

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

965

1433

1434

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

1435

def PropertiesChanged(self, interface_name, changed_properties,

1436

invalidated_properties):

1437

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

1438

standard.

1439

"""

1440

pass

1441

966

1442

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

967

1443

out_signature="s",

968

1444

path_keyword='object_path',

969

1445

connection_keyword='connection')

970

1446

def Introspect(self, object_path, connection):

971

1447

"""Overloading of standard D-Bus method.

972

1448

973

1449

Inserts property tags and interface annotation tags.

974

1450

"""

975

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

976

connection)

1451

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1452

object_path,

1453

connection)

977

1454

try:

978

1455

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

1456

979

1457

def make_tag(document, name, prop):

980

1458

e = document.createElement("property")

981

1459

e.setAttribute("name", name)

982

1460

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

983

1461

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

984

1462

return e

1463

985

1464

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

986

1465

# Add property tags

987

1466

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

990

1469

if prop._dbus_interface

991

1470

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

992

1471

if_tag.appendChild(tag)

993

# Add annotation tags

994

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

995

for tag in if_tag.getElementsByTagName(typ):

996

annots = dict()

997

for name, prop in (self.

998

_get_all_dbus_things(typ)):

999

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

1000

and prop._dbus_interface

1001

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

1002

annots.update(getattr

1003

(prop,

1004

"_dbus_annotations",

1005

{}))

1006

for name, value in annots.iteritems():

1007

ann_tag = document.createElement(

1008

"annotation")

1009

ann_tag.setAttribute("name", name)

1010

ann_tag.setAttribute("value", value)

1011

tag.appendChild(ann_tag)

1012

# Add interface annotation tags

1013

for annotation, value in dict(

1014

itertools.chain.from_iterable(

1015

annotations().iteritems()

1016

for name, annotations in

1017

self._get_all_dbus_things("interface")

1018

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

1019

)).iteritems():

1020

ann_tag = document.createElement("annotation")

1021

ann_tag.setAttribute("name", annotation)

1022

ann_tag.setAttribute("value", value)

1023

if_tag.appendChild(ann_tag)

1472

# Add annotation tags for properties

1473

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

1474

annots = dict()

1475

for name, prop in self._get_all_dbus_things(

1476

"property"):

1477

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

1478

and prop._dbus_interface

1479

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

1480

annots.update(getattr(

1481

prop, "_dbus_annotations", {}))

1482

for name, value in annots.items():

1483

ann_tag = document.createElement(

1484

"annotation")

1485

ann_tag.setAttribute("name", name)

1486

ann_tag.setAttribute("value", value)

1487

tag.appendChild(ann_tag)

1024

1488

# Add the names to the return values for the

1025

1489

# "org.freedesktop.DBus.Properties" methods

1026

1490

if (if_tag.getAttribute("name")

1045

1509

return xmlstring

1046

1510

1047

1511

1512

try:

1513

dbus.OBJECT_MANAGER_IFACE

1514

except AttributeError:

1515

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

1516

1517

1518

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1519

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

1520

1521

Classes inheriting from this exposes the standard

1522

GetManagedObjects call and the InterfacesAdded and

1523

InterfacesRemoved signals on the standard

1524

"org.freedesktop.DBus.ObjectManager" interface.

1525

1526

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

1527

manually.

1528

"""

1529

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1530

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

1531

def GetManagedObjects(self):

1532

"""This function must be overridden"""

1533

raise NotImplementedError()

1534

1535

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1536

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

1537

def InterfacesAdded(self, object_path, interfaces_and_properties):

1538

pass

1539

1540

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

1541

def InterfacesRemoved(self, object_path, interfaces):

1542

pass

1543

1544

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1545

out_signature="s",

1546

path_keyword='object_path',

1547

connection_keyword='connection')

1548

def Introspect(self, object_path, connection):

1549

"""Overloading of standard D-Bus method.

1550

1551

Override return argument name of GetManagedObjects to be

1552

"objpath_interfaces_and_properties"

1553

"""

1554

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1555

object_path,

1556

connection)

1557

try:

1558

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

1559

1560

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

1561

# Fix argument name for the GetManagedObjects method

1562

if (if_tag.getAttribute("name")

1563

== dbus.OBJECT_MANAGER_IFACE):

1564

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

1565

if (cn.getAttribute("name")

1566

== "GetManagedObjects"):

1567

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

1568

if (arg.getAttribute("direction")

1569

== "out"):

1570

arg.setAttribute(

1571

"name",

1572

"objpath_interfaces"

1573

"_and_properties")

1574

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

1575

document.unlink()

1576

except (AttributeError, xml.dom.DOMException,

1577

xml.parsers.expat.ExpatError) as error:

1578

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

1579

exc_info=error)

1580

return xmlstring

1581

1582

1048

1583

def datetime_to_dbus(dt, variant_level=0):

1049

1584

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

1050

1585

if dt is None:

1051

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

1052

return dbus.String(dt.isoformat(),

1053

variant_level=variant_level)

1586

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

1587

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

1054

1588

1055

1589

1056

1590

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1058

1592

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

1059

1593

interface names according to the "alt_interface_names" mapping.

1060

1594

Usage:

1061

1595

1062

1596

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

1063

1597

"net.example.AlternateInterface"})

1064

1598

class SampleDBusObject(dbus.service.Object):

1065

1599

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

1066

1600

def SampleDBusMethod():

1067

1601

pass

1068

1602

1069

1603

The above "SampleDBusMethod" on "SampleDBusObject" will be

1070

1604

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

1071

1605

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

1072

1606

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

1073

1607

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

1074

1608

1075

1609

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

1076

1610

(from DBusObjectWithProperties) and interfaces (from the

1077

1611

dbus_interface_annotations decorator).

1078

1612

"""

1613

1079

1614

def wrapper(cls):

1080

1615

for orig_interface_name, alt_interface_name in (

1081

alt_interface_names.iteritems()):

1616

alt_interface_names.items()):

1082

1617

attr = {}

1083

1618

interface_names = set()

1084

1619

# Go though all attributes of the class

1086

1621

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

1087

1622

# with the wrong interface name

1088

1623

if (not hasattr(attribute, "_dbus_interface")

1089

or not attribute._dbus_interface

1090

.startswith(orig_interface_name)):

1624

or not attribute._dbus_interface.startswith(

1625

orig_interface_name)):

1091

1626

continue

1092

1627

# Create an alternate D-Bus interface name based on

1093

1628

# the current name

1094

alt_interface = (attribute._dbus_interface

1095

.replace(orig_interface_name,

1096

alt_interface_name))

1629

alt_interface = attribute._dbus_interface.replace(

1630

orig_interface_name, alt_interface_name)

1097

1631

interface_names.add(alt_interface)

1098

1632

# Is this a D-Bus signal?

1099

1633

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

1100

1634

# Extract the original non-method undecorated

1101

1635

# function by black magic

1102

nonmethod_func = (dict(

1636

if sys.version_info.major == 2:

1637

nonmethod_func = (dict(

1103

1638

zip(attribute.func_code.co_freevars,

1104

attribute.__closure__))["func"]

1105

.cell_contents)

1639

attribute.__closure__))

1640

["func"].cell_contents)

1641

else:

1642

nonmethod_func = (dict(

1643

zip(attribute.__code__.co_freevars,

1644

attribute.__closure__))

1645

["func"].cell_contents)

1106

1646

# Create a new, but exactly alike, function

1107

1647

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

1108

1648

# with the alternate D-Bus interface name

1109

new_function = (dbus.service.signal

1110

(alt_interface,

1111

attribute._dbus_signature)

1112

(types.FunctionType(

1113

nonmethod_func.func_code,

1114

nonmethod_func.func_globals,

1115

nonmethod_func.func_name,

1116

nonmethod_func.func_defaults,

1117

nonmethod_func.func_closure)))

1649

new_function = copy_function(nonmethod_func)

1650

new_function = (dbus.service.signal(

1651

alt_interface,

1652

attribute._dbus_signature)(new_function))

1118

1653

# Copy annotations, if any

1119

1654

try:

1120

new_function._dbus_annotations = (

1121

dict(attribute._dbus_annotations))

1655

new_function._dbus_annotations = dict(

1656

attribute._dbus_annotations)

1122

1657

except AttributeError:

1123

1658

pass

1659

1124

1660

# Define a creator of a function to call both the

1125

1661

# original and alternate functions, so both the

1126

1662

# original and alternate signals gets sent when

1129

1665

"""This function is a scope container to pass

1130

1666

func1 and func2 to the "call_both" function

1131

1667

outside of its arguments"""

1668

1669

@functools.wraps(func2)

1132

1670

def call_both(*args, **kwargs):

1133

1671

"""This function will emit two D-Bus

1134

1672

signals by calling func1 and func2"""

1135

1673

func1(*args, **kwargs)

1136

1674

func2(*args, **kwargs)

1675

# Make wrapper function look like a D-Bus

1676

# signal

1677

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

1678

if name.startswith("_dbus_"):

1679

setattr(call_both, name, attr)

1680

1137

1681

return call_both

1138

1682

# Create the "call_both" function and add it to

1139

1683

# the class

1144

1688

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

1145

1689

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

1146

1690

# to the class.

1147

attr[attrname] = (dbus.service.method

1148

(alt_interface,

1149

attribute._dbus_in_signature,

1150

attribute._dbus_out_signature)

1151

(types.FunctionType

1152

(attribute.func_code,

1153

attribute.func_globals,

1154

attribute.func_name,

1155

attribute.func_defaults,

1156

attribute.func_closure)))

1691

attr[attrname] = (

1692

dbus.service.method(

1693

alt_interface,

1694

attribute._dbus_in_signature,

1695

attribute._dbus_out_signature)

1696

(copy_function(attribute)))

1157

1697

# Copy annotations, if any

1158

1698

try:

1159

attr[attrname]._dbus_annotations = (

1160

dict(attribute._dbus_annotations))

1699

attr[attrname]._dbus_annotations = dict(

1700

attribute._dbus_annotations)

1161

1701

except AttributeError:

1162

1702

pass

1163

1703

# Is this a D-Bus property?

1166

1706

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

1167

1707

# property with the alternate D-Bus interface

1168

1708

# name. Add it to the class.

1169

attr[attrname] = (dbus_service_property

1170

(alt_interface,

1171

attribute._dbus_signature,

1172

attribute._dbus_access,

1173

attribute

1174

._dbus_get_args_options

1175

["byte_arrays"])

1176

(types.FunctionType

1177

(attribute.func_code,

1178

attribute.func_globals,

1179

attribute.func_name,

1180

attribute.func_defaults,

1181

attribute.func_closure)))

1709

attr[attrname] = (dbus_service_property(

1710

alt_interface, attribute._dbus_signature,

1711

attribute._dbus_access,

1712

attribute._dbus_get_args_options

1713

["byte_arrays"])

1714

(copy_function(attribute)))

1182

1715

# Copy annotations, if any

1183

1716

try:

1184

attr[attrname]._dbus_annotations = (

1185

dict(attribute._dbus_annotations))

1717

attr[attrname]._dbus_annotations = dict(

1718

attribute._dbus_annotations)

1186

1719

except AttributeError:

1187

1720

pass

1188

1721

# Is this a D-Bus interface?

1191

1724

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

1192

1725

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

1193

1726

# to the class.

1194

attr[attrname] = (dbus_interface_annotations

1195

(alt_interface)

1196

(types.FunctionType

1197

(attribute.func_code,

1198

attribute.func_globals,

1199

attribute.func_name,

1200

attribute.func_defaults,

1201

attribute.func_closure)))

1727

attr[attrname] = (

1728

dbus_interface_annotations(alt_interface)

1729

(copy_function(attribute)))

1202

1730

if deprecate:

1203

1731

# Deprecate all alternate interfaces

1204

iname="_AlternateDBusNames_interface_annotation{0}"

1732

iname = "_AlternateDBusNames_interface_annotation{}"

1205

1733

for interface_name in interface_names:

1734

1206

1735

@dbus_interface_annotations(interface_name)

1207

1736

def func(self):

1208

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

1209

"true" }

1737

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

1738

"true"}

1210

1739

# Find an unused name

1211

1740

for aname in (iname.format(i)

1212

1741

for i in itertools.count()):

1216

1745

if interface_names:

1217

1746

# Replace the class with a new subclass of it with

1218

1747

# methods, signals, etc. as created above.

1219

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

1220

(cls,), attr)

1748

if sys.version_info.major == 2:

1749

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

1750

(cls, ), attr)

1751

else:

1752

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

1753

(cls, ), attr)

1221

1754

return cls

1755

1222

1756

return wrapper

1223

1757

1224

1758

1225

1759

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

1226

"se.bsnet.fukt.Mandos"})

1760

"se.bsnet.fukt.Mandos"})

1227

1761

class ClientDBus(Client, DBusObjectWithProperties):

1228

1762

"""A Client class using D-Bus

1229

1763

1230

1764

Attributes:

1231

1765

dbus_object_path: dbus.ObjectPath

1232

1766

bus: dbus.SystemBus()

1233

1767

"""

1234

1768

1235

1769

runtime_expansions = (Client.runtime_expansions

1236

+ ("dbus_object_path",))

1237

1770

+ ("dbus_object_path", ))

1771

1772

_interface = "se.recompile.Mandos.Client"

1773

1238

1774

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

1239

1240

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

1775

1776

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

1241

1777

self.bus = bus

1242

1778

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

1243

1779

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

1244

1780

# the D-Bus

1245

client_object_name = unicode(self.name).translate(

1781

client_object_name = str(self.name).translate(

1246

1782

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

1247

1783

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

1248

self.dbus_object_path = (dbus.ObjectPath

1249

("/clients/" + client_object_name))

1784

self.dbus_object_path = dbus.ObjectPath(

1785

"/clients/" + client_object_name)

1250

1786

DBusObjectWithProperties.__init__(self, self.bus,

1251

1787

self.dbus_object_path)

1252

1253

def notifychangeproperty(transform_func,

1254

dbus_name, type_func=lambda x: x,

1255

variant_level=1):

1788

1789

def notifychangeproperty(transform_func, dbus_name,

1790

type_func=lambda x: x,

1791

variant_level=1,

1792

invalidate_only=False,

1793

_interface=_interface):

1256

1794

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

1257

1795

its changes to DBus.

1258

1796

1259

1797

transform_fun: Function that takes a value and a variant_level

1260

1798

and transforms it to a D-Bus type.

1261

1799

dbus_name: D-Bus name of the variable

1263

1801

to the D-Bus. Default: no transform

1264

1802

variant_level: D-Bus variant level. Default: 1

1265

1803

"""

1266

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

1804

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

1805

1267

1806

def setter(self, value):

1268

1807

if hasattr(self, "dbus_object_path"):

1269

1808

if (not hasattr(self, attrname) or

1270

1809

type_func(getattr(self, attrname, None))

1271

1810

!= type_func(value)):

1272

dbus_value = transform_func(type_func(value),

1273

variant_level

1274

=variant_level)

1275

self.PropertyChanged(dbus.String(dbus_name),

1276

dbus_value)

1811

if invalidate_only:

1812

self.PropertiesChanged(

1813

_interface, dbus.Dictionary(),

1814

dbus.Array((dbus_name, )))

1815

else:

1816

dbus_value = transform_func(

1817

type_func(value),

1818

variant_level=variant_level)

1819

self.PropertyChanged(dbus.String(dbus_name),

1820

dbus_value)

1821

self.PropertiesChanged(

1822

_interface,

1823

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

1824

dbus_value}),

1825

dbus.Array())

1277

1826

setattr(self, attrname, value)

1278

1827

1279

1828

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

1280

1829

1281

1830

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1282

1831

approvals_pending = notifychangeproperty(dbus.Boolean,

1283

1832

"ApprovalPending",

1284

type_func = bool)

1833

type_func=bool)

1285

1834

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

1286

1835

last_enabled = notifychangeproperty(datetime_to_dbus,

1287

1836

"LastEnabled")

1288

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

1289

type_func = lambda checker:

1290

checker is not None)

1837

checker = notifychangeproperty(

1838

dbus.Boolean, "CheckerRunning",

1839

type_func=lambda checker: checker is not None)

1291

1840

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1292

1841

"LastCheckedOK")

1293

1842

last_checker_status = notifychangeproperty(dbus.Int16,

1296

1845

datetime_to_dbus, "LastApprovalRequest")

1297

1846

approved_by_default = notifychangeproperty(dbus.Boolean,

1298

1847

"ApprovedByDefault")

1299

approval_delay = notifychangeproperty(dbus.UInt64,

1300

"ApprovalDelay",

1301

type_func =

1302

timedelta_to_milliseconds)

1848

approval_delay = notifychangeproperty(

1849

dbus.UInt64, "ApprovalDelay",

1850

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

1303

1851

approval_duration = notifychangeproperty(

1304

1852

dbus.UInt64, "ApprovalDuration",

1305

type_func = timedelta_to_milliseconds)

1853

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

1306

1854

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

1307

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

1308

type_func =

1309

timedelta_to_milliseconds)

1855

timeout = notifychangeproperty(

1856

dbus.UInt64, "Timeout",

1857

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

1310

1858

extended_timeout = notifychangeproperty(

1311

1859

dbus.UInt64, "ExtendedTimeout",

1312

type_func = timedelta_to_milliseconds)

1313

interval = notifychangeproperty(dbus.UInt64,

1314

"Interval",

1315

type_func =

1316

timedelta_to_milliseconds)

1860

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

1861

interval = notifychangeproperty(

1862

dbus.UInt64, "Interval",

1863

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

1317

1864

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

1318

1865

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

1866

invalidate_only=True)

1867

1319

1868

del notifychangeproperty

1320

1869

1321

1870

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

1322

1871

try:

1323

1872

self.remove_from_connection()

1326

1875

if hasattr(DBusObjectWithProperties, "__del__"):

1327

1876

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

1328

1877

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

1329

1330

def checker_callback(self, pid, condition, command,

1331

*args, **kwargs):

1332

self.checker_callback_tag = None

1333

self.checker = None

1334

if os.WIFEXITED(condition):

1335

exitstatus = os.WEXITSTATUS(condition)

1878

1879

def checker_callback(self, source, condition,

1880

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

1881

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

1882

connection, command, *args,

1883

**kwargs)

1884

exitstatus = self.last_checker_status

1885

if exitstatus >= 0:

1336

1886

# Emit D-Bus signal

1337

1887

self.CheckerCompleted(dbus.Int16(exitstatus),

1338

dbus.Int64(condition),

1888

# This is specific to GNU libC

1889

dbus.Int64(exitstatus << 8),

1339

1890

dbus.String(command))

1340

1891

else:

1341

1892

# Emit D-Bus signal

1342

1893

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

1343

dbus.Int64(condition),

1894

dbus.Int64(

1895

# This is specific to GNU libC

1896

(exitstatus << 8)

1897

| self.last_checker_signal),

1344

1898

dbus.String(command))

1345

1346

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

1347

*args, **kwargs)

1348

1899

return ret

1900

1349

1901

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

1350

old_checker = self.checker

1351

if self.checker is not None:

1352

old_checker_pid = self.checker.pid

1353

else:

1354

old_checker_pid = None

1902

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

1355

1903

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

1356

1904

# Only if new checker process was started

1357

1905

if (self.checker is not None

1359

1907

# Emit D-Bus signal

1360

1908

self.CheckerStarted(self.current_checker_command)

1361

1909

return r

1362

1910

1363

1911

def _reset_approved(self):

1364

1912

self.approved = None

1365

1913

return False

1366

1914

1367

1915

def approve(self, value=True):

1368

1916

self.approved = value

1369

gobject.timeout_add(timedelta_to_milliseconds

1370

(self.approval_duration),

1371

self._reset_approved)

1917

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

1918

* 1000), self._reset_approved)

1372

1919

self.send_changedstate()

1373

1374

## D-Bus methods, signals & properties

1375

_interface = "se.recompile.Mandos.Client"

1376

1377

## Interfaces

1378

1379

@dbus_interface_annotations(_interface)

1380

def _foo(self):

1381

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

1382

"false"}

1383

1384

## Signals

1385

1920

1921

# D-Bus methods, signals & properties

1922

1923

# Interfaces

1924

1925

# Signals

1926

1386

1927

# CheckerCompleted - signal

1387

1928

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

1388

1929

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

1389

1930

"D-Bus signal"

1390

1931

pass

1391

1932

1392

1933

# CheckerStarted - signal

1393

1934

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

1394

1935

def CheckerStarted(self, command):

1395

1936

"D-Bus signal"

1396

1937

pass

1397

1938

1398

1939

# PropertyChanged - signal

1940

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

1399

1941

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

1400

1942

def PropertyChanged(self, property, value):

1401

1943

"D-Bus signal"

1402

1944

pass

1403

1945

1404

1946

# GotSecret - signal

1405

1947

@dbus.service.signal(_interface)

1406

1948

def GotSecret(self):

1409

1951

server to mandos-client

1410

1952

"""

1411

1953

pass

1412

1954

1413

1955

# Rejected - signal

1414

1956

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

1415

1957

def Rejected(self, reason):

1416

1958

"D-Bus signal"

1417

1959

pass

1418

1960

1419

1961

# NeedApproval - signal

1420

1962

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

1421

1963

def NeedApproval(self, timeout, default):

1422

1964

"D-Bus signal"

1423

1965

return self.need_approval()

1424

1425

## Methods

1426

1966

1967

# Methods

1968

1427

1969

# Approve - method

1428

1970

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

1429

1971

def Approve(self, value):

1430

1972

self.approve(value)

1431

1973

1432

1974

# CheckedOK - method

1433

1975

@dbus.service.method(_interface)

1434

1976

def CheckedOK(self):

1435

1977

self.checked_ok()

1436

1978

1437

1979

# Enable - method

1980

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

1438

1981

@dbus.service.method(_interface)

1439

1982

def Enable(self):

1440

1983

"D-Bus method"

1441

1984

self.enable()

1442

1985

1443

1986

# StartChecker - method

1987

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

1444

1988

@dbus.service.method(_interface)

1445

1989

def StartChecker(self):

1446

1990

"D-Bus method"

1447

1991

self.start_checker()

1448

1992

1449

1993

# Disable - method

1994

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

1450

1995

@dbus.service.method(_interface)

1451

1996

def Disable(self):

1452

1997

"D-Bus method"

1453

1998

self.disable()

1454

1999

1455

2000

# StopChecker - method

2001

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

1456

2002

@dbus.service.method(_interface)

1457

2003

def StopChecker(self):

1458

2004

self.stop_checker()

1459

1460

## Properties

1461

2005

2006

# Properties

2007

1462

2008

# ApprovalPending - property

1463

2009

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

1464

2010

def ApprovalPending_dbus_property(self):

1465

2011

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

1466

2012

1467

2013

# ApprovedByDefault - property

1468

@dbus_service_property(_interface, signature="b",

2014

@dbus_service_property(_interface,

2015

signature="b",

1469

2016

access="readwrite")

1470

2017

def ApprovedByDefault_dbus_property(self, value=None):

1471

2018

if value is None: # get

1472

2019

return dbus.Boolean(self.approved_by_default)

1473

2020

self.approved_by_default = bool(value)

1474

2021

1475

2022

# ApprovalDelay - property

1476

@dbus_service_property(_interface, signature="t",

2023

@dbus_service_property(_interface,

2024

signature="t",

1477

2025

access="readwrite")

1478

2026

def ApprovalDelay_dbus_property(self, value=None):

1479

2027

if value is None: # get

1480

return dbus.UInt64(self.approval_delay_milliseconds())

2028

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

2029

* 1000)

1481

2030

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

1482

2031

1483

2032

# ApprovalDuration - property

1484

@dbus_service_property(_interface, signature="t",

2033

@dbus_service_property(_interface,

2034

signature="t",

1485

2035

access="readwrite")

1486

2036

def ApprovalDuration_dbus_property(self, value=None):

1487

2037

if value is None: # get

1488

return dbus.UInt64(timedelta_to_milliseconds(

1489

self.approval_duration))

2038

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

2039

* 1000)

1490

2040

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

1491

2041

1492

2042

# Name - property

2043

@dbus_annotations(

2044

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

1493

2045

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

1494

2046

def Name_dbus_property(self):

1495

2047

return dbus.String(self.name)

1496

2048

2049

# KeyID - property

2050

@dbus_annotations(

2051

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

2052

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

2053

def KeyID_dbus_property(self):

2054

return dbus.String(self.key_id)

2055

1497

2056

# Fingerprint - property

2057

@dbus_annotations(

2058

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

1498

2059

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

1499

2060

def Fingerprint_dbus_property(self):

1500

2061

return dbus.String(self.fingerprint)

1501

2062

1502

2063

# Host - property

1503

@dbus_service_property(_interface, signature="s",

2064

@dbus_service_property(_interface,

2065

signature="s",

1504

2066

access="readwrite")

1505

2067

def Host_dbus_property(self, value=None):

1506

2068

if value is None: # get

1507

2069

return dbus.String(self.host)

1508

self.host = unicode(value)

1509

2070

self.host = str(value)

2071

1510

2072

# Created - property

2073

@dbus_annotations(

2074

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

1511

2075

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

1512

2076

def Created_dbus_property(self):

1513

2077

return datetime_to_dbus(self.created)

1514

2078

1515

2079

# LastEnabled - property

1516

2080

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

1517

2081

def LastEnabled_dbus_property(self):

1518

2082

return datetime_to_dbus(self.last_enabled)

1519

2083

1520

2084

# Enabled - property

1521

@dbus_service_property(_interface, signature="b",

2085

@dbus_service_property(_interface,

2086

signature="b",

1522

2087

access="readwrite")

1523

2088

def Enabled_dbus_property(self, value=None):

1524

2089

if value is None: # get

1527

2092

self.enable()

1528

2093

else:

1529

2094

self.disable()

1530

2095

1531

2096

# LastCheckedOK - property

1532

@dbus_service_property(_interface, signature="s",

2097

@dbus_service_property(_interface,

2098

signature="s",

1533

2099

access="readwrite")

1534

2100

def LastCheckedOK_dbus_property(self, value=None):

1535

2101

if value is not None:

1536

2102

self.checked_ok()

1537

2103

return

1538

2104

return datetime_to_dbus(self.last_checked_ok)

1539

2105

1540

2106

# LastCheckerStatus - property

1541

@dbus_service_property(_interface, signature="n",

1542

access="read")

2107

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

1543

2108

def LastCheckerStatus_dbus_property(self):

1544

2109

return dbus.Int16(self.last_checker_status)

1545

2110

1546

2111

# Expires - property

1547

2112

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

1548

2113

def Expires_dbus_property(self):

1549

2114

return datetime_to_dbus(self.expires)

1550

2115

1551

2116

# LastApprovalRequest - property

1552

2117

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

1553

2118

def LastApprovalRequest_dbus_property(self):

1554

2119

return datetime_to_dbus(self.last_approval_request)

1555

2120

1556

2121

# Timeout - property

1557

@dbus_service_property(_interface, signature="t",

2122

@dbus_service_property(_interface,

2123

signature="t",

1558

2124

access="readwrite")

1559

2125

def Timeout_dbus_property(self, value=None):

1560

2126

if value is None: # get

1561

return dbus.UInt64(self.timeout_milliseconds())

2127

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

1562

2128

old_timeout = self.timeout

1563

2129

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

1564

2130

# Reschedule disabling

1572

2138

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

1573

2139

is None):

1574

2140

return

1575

gobject.source_remove(self.disable_initiator_tag)

1576

self.disable_initiator_tag = (

1577

gobject.timeout_add(

1578

timedelta_to_milliseconds(self.expires - now),

1579

self.disable))

1580

2141

GLib.source_remove(self.disable_initiator_tag)

2142

self.disable_initiator_tag = GLib.timeout_add(

2143

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

2144

self.disable)

2145

1581

2146

# ExtendedTimeout - property

1582

@dbus_service_property(_interface, signature="t",

2147

@dbus_service_property(_interface,

2148

signature="t",

1583

2149

access="readwrite")

1584

2150

def ExtendedTimeout_dbus_property(self, value=None):

1585

2151

if value is None: # get

1586

return dbus.UInt64(self.extended_timeout_milliseconds())

2152

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

2153

* 1000)

1587

2154

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

1588

2155

1589

2156

# Interval - property

1590

@dbus_service_property(_interface, signature="t",

2157

@dbus_service_property(_interface,

2158

signature="t",

1591

2159

access="readwrite")

1592

2160

def Interval_dbus_property(self, value=None):

1593

2161

if value is None: # get

1594

return dbus.UInt64(self.interval_milliseconds())

2162

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

1595

2163

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

1596

2164

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

1597

2165

return

1598

2166

if self.enabled:

1599

2167

# Reschedule checker run

1600

gobject.source_remove(self.checker_initiator_tag)

1601

self.checker_initiator_tag = (gobject.timeout_add

1602

(value, self.start_checker))

1603

self.start_checker() # Start one now, too

1604

2168

GLib.source_remove(self.checker_initiator_tag)

2169

self.checker_initiator_tag = GLib.timeout_add(

2170

value, self.start_checker)

2171

self.start_checker() # Start one now, too

2172

1605

2173

# Checker - property

1606

@dbus_service_property(_interface, signature="s",

2174

@dbus_service_property(_interface,

2175

signature="s",

1607

2176

access="readwrite")

1608

2177

def Checker_dbus_property(self, value=None):

1609

2178

if value is None: # get

1610

2179

return dbus.String(self.checker_command)

1611

self.checker_command = unicode(value)

1612

2180

self.checker_command = str(value)

2181

1613

2182

# CheckerRunning - property

1614

@dbus_service_property(_interface, signature="b",

2183

@dbus_service_property(_interface,

2184

signature="b",

1615

2185

access="readwrite")

1616

2186

def CheckerRunning_dbus_property(self, value=None):

1617

2187

if value is None: # get

1620

2190

self.start_checker()

1621

2191

else:

1622

2192

self.stop_checker()

1623

2193

1624

2194

# ObjectPath - property

2195

@dbus_annotations(

2196

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

2197

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

1625

2198

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

1626

2199

def ObjectPath_dbus_property(self):

1627

return self.dbus_object_path # is already a dbus.ObjectPath

1628

2200

return self.dbus_object_path # is already a dbus.ObjectPath

2201

1629

2202

# Secret = property

1630

@dbus_service_property(_interface, signature="ay",

1631

access="write", byte_arrays=True)

2203

@dbus_annotations(

2204

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

2205

"invalidates"})

2206

@dbus_service_property(_interface,

2207

signature="ay",

2208

access="write",

2209

byte_arrays=True)

1632

2210

def Secret_dbus_property(self, value):

1633

self.secret = str(value)

1634

2211

self.secret = bytes(value)

2212

1635

2213

del _interface

1636

2214

1637

2215

1638

2216

class ProxyClient(object):

1639

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

2217

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

1640

2218

self._pipe = child_pipe

1641

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

2219

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

1642

2220

if not self._pipe.recv():

1643

raise KeyError()

1644

2221

raise KeyError(key_id or fpr)

2222

1645

2223

def __getattribute__(self, name):

1646

2224

if name == '_pipe':

1647

2225

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

1650

2228

if data[0] == 'data':

1651

2229

return data[1]

1652

2230

if data[0] == 'function':

2231

1653

2232

def func(*args, **kwargs):

1654

2233

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

1655

2234

return self._pipe.recv()[1]

2235

1656

2236

return func

1657

2237

1658

2238

def __setattr__(self, name, value):

1659

2239

if name == '_pipe':

1660

2240

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

1663

2243

1664

2244

class ClientHandler(socketserver.BaseRequestHandler, object):

1665

2245

"""A class to handle client connections.

1666

2246

1667

2247

Instantiated once for each connection to handle it.

1668

2248

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

1669

2249

1670

2250

def handle(self):

1671

2251

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

1672

2252

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

1673

unicode(self.client_address))

2253

str(self.client_address))

1674

2254

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

1675

2255

self.server.child_pipe.fileno())

1676

1677

session = (gnutls.connection

1678

.ClientSession(self.request,

1679

gnutls.connection

1680

.X509Credentials()))

1681

1682

# Note: gnutls.connection.X509Credentials is really a

1683

# generic GnuTLS certificate credentials object so long as

1684

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

1685

# here despite using OpenPGP certificates.

1686

1687

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

1688

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

1689

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

1690

# "+DHE-DSS"))

2256

2257

session = gnutls.ClientSession(self.request)

2258

2259

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

2260

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

2261

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

2262

# "+DHE-DSS"))

1691

2263

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

1692

2264

priority = self.server.gnutls_priority

1693

2265

if priority is None:

1694

2266

priority = "NORMAL"

1695

(gnutls.library.functions

1696

.gnutls_priority_set_direct(session._c_object,

1697

priority, None))

1698

2267

gnutls.priority_set_direct(session._c_object,

2268

priority.encode("utf-8"),

2269

None)

2270

1699

2271

# Start communication using the Mandos protocol

1700

2272

# Get protocol number

1701

2273

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

1702

2274

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

1703

2275

try:

1704

2276

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

1705

raise RuntimeError

2277

raise RuntimeError(line)

1706

2278

except (ValueError, IndexError, RuntimeError) as error:

1707

2279

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

1708

2280

return

1709

2281

1710

2282

# Start GnuTLS connection

1711

2283

try:

1712

2284

session.handshake()

1713

except gnutls.errors.GNUTLSError as error:

2285

except gnutls.Error as error:

1714

2286

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

1715

2287

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

1716

2288

# established. Just abandon the request.

1717

2289

return

1718

2290

logger.debug("Handshake succeeded")

1719

2291

1720

2292

approval_required = False

1721

2293

try:

1722

try:

1723

fpr = self.fingerprint(self.peer_certificate

1724

(session))

1725

except (TypeError,

1726

gnutls.errors.GNUTLSError) as error:

1727

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

1728

return

1729

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

1730

1731

try:

1732

client = ProxyClient(child_pipe, fpr,

2294

if gnutls.has_rawpk:

2295

fpr = b""

2296

try:

2297

key_id = self.key_id(

2298

self.peer_certificate(session))

2299

except (TypeError, gnutls.Error) as error:

2300

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

2301

return

2302

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

2303

2304

else:

2305

key_id = b""

2306

try:

2307

fpr = self.fingerprint(

2308

self.peer_certificate(session))

2309

except (TypeError, gnutls.Error) as error:

2310

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

2311

return

2312

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

2313

2314

try:

2315

client = ProxyClient(child_pipe, key_id, fpr,

1733

2316

self.client_address)

1734

2317

except KeyError:

1735

2318

return

1736

2319

1737

2320

if client.approval_delay:

1738

2321

delay = client.approval_delay

1739

2322

client.approvals_pending += 1

1740

2323

approval_required = True

1741

2324

1742

2325

while True:

1743

2326

if not client.enabled:

1744

2327

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

1745

client.name)

2328

client.name)

1746

2329

if self.server.use_dbus:

1747

2330

# Emit D-Bus signal

1748

2331

client.Rejected("Disabled")

1749

2332

return

1750

2333

1751

2334

if client.approved or not client.approval_delay:

1752

#We are approved or approval is disabled

2335

# We are approved or approval is disabled

1753

2336

break

1754

2337

elif client.approved is None:

1755

2338

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

1757

2340

if self.server.use_dbus:

1758

2341

# Emit D-Bus signal

1759

2342

client.NeedApproval(

1760

client.approval_delay_milliseconds(),

1761

client.approved_by_default)

2343

client.approval_delay.total_seconds()

2344

* 1000, client.approved_by_default)

1762

2345

else:

1763

2346

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

1764

2347

client.name)

1766

2349

# Emit D-Bus signal

1767

2350

client.Rejected("Denied")

1768

2351

return

1769

1770

#wait until timeout or approved

2352

2353

# wait until timeout or approved

1771

2354

time = datetime.datetime.now()

1772

2355

client.changedstate.acquire()

1773

client.changedstate.wait(

1774

float(timedelta_to_milliseconds(delay)

1775

/ 1000))

2356

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

1776

2357

client.changedstate.release()

1777

2358

time2 = datetime.datetime.now()

1778

2359

if (time2 - time) >= delay:

1788

2369

break

1789

2370

else:

1790

2371

delay -= time2 - time

1791

1792

sent_size = 0

1793

while sent_size < len(client.secret):

1794

try:

1795

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

1796

except gnutls.errors.GNUTLSError as error:

1797

logger.warning("gnutls send failed",

1798

exc_info=error)

1799

return

1800

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

1801

sent, len(client.secret)

1802

- (sent_size + sent))

1803

sent_size += sent

1804

2372

2373

try:

2374

session.send(client.secret)

2375

except gnutls.Error as error:

2376

logger.warning("gnutls send failed",

2377

exc_info=error)

2378

return

2379

1805

2380

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

1806

2381

# bump the timeout using extended_timeout

1807

2382

client.bump_timeout(client.extended_timeout)

1808

2383

if self.server.use_dbus:

1809

2384

# Emit D-Bus signal

1810

2385

client.GotSecret()

1811

2386

1812

2387

finally:

1813

2388

if approval_required:

1814

2389

client.approvals_pending -= 1

1815

2390

try:

1816

2391

session.bye()

1817

except gnutls.errors.GNUTLSError as error:

2392

except gnutls.Error as error:

1818

2393

logger.warning("GnuTLS bye failed",

1819

2394

exc_info=error)

1820

2395

1821

2396

@staticmethod

1822

2397

def peer_certificate(session):

1823

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

1824

# If not an OpenPGP certificate...

1825

if (gnutls.library.functions

1826

.gnutls_certificate_type_get(session._c_object)

1827

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1828

# ...do the normal thing

1829

return session.peer_certificate

2398

"Return the peer's certificate as a bytestring"

2399

try:

2400

cert_type = gnutls.certificate_type_get2(session._c_object,

2401

gnutls.CTYPE_PEERS)

2402

except AttributeError:

2403

cert_type = gnutls.certificate_type_get(session._c_object)

2404

if gnutls.has_rawpk:

2405

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2406

else:

2407

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2408

# If not a valid certificate type...

2409

if cert_type not in valid_cert_types:

2410

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

2411

valid_cert_types)

2412

# ...return invalid data

2413

return b""

1830

2414

list_size = ctypes.c_uint(1)

1831

cert_list = (gnutls.library.functions

1832

.gnutls_certificate_get_peers

2415

cert_list = (gnutls.certificate_get_peers

1833

2416

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

1834

2417

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

1835

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

1836

" certificate")

2418

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

1837

2419

if list_size.value == 0:

1838

2420

return None

1839

2421

cert = cert_list[0]

1840

2422

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

1841

2423

2424

@staticmethod

2425

def key_id(certificate):

2426

"Convert a certificate bytestring to a hexdigit key ID"

2427

# New GnuTLS "datum" with the public key

2428

datum = gnutls.datum_t(

2429

ctypes.cast(ctypes.c_char_p(certificate),

2430

ctypes.POINTER(ctypes.c_ubyte)),

2431

ctypes.c_uint(len(certificate)))

2432

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

2433

# New empty GnuTLS certificate

2434

pubkey = gnutls.pubkey_t()

2435

gnutls.pubkey_init(ctypes.byref(pubkey))

2436

# Import the raw public key into the certificate

2437

gnutls.pubkey_import(pubkey,

2438

ctypes.byref(datum),

2439

gnutls.X509_FMT_DER)

2440

# New buffer for the key ID

2441

buf = ctypes.create_string_buffer(32)

2442

buf_len = ctypes.c_size_t(len(buf))

2443

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

2444

gnutls.pubkey_get_key_id(pubkey,

2445

gnutls.KEYID_USE_SHA256,

2446

ctypes.cast(ctypes.byref(buf),

2447

ctypes.POINTER(ctypes.c_ubyte)),

2448

ctypes.byref(buf_len))

2449

# Deinit the certificate

2450

gnutls.pubkey_deinit(pubkey)

2451

2452

# Convert the buffer to a Python bytestring

2453

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

2454

# Convert the bytestring to hexadecimal notation

2455

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

2456

return hex_key_id

2457

1842

2458

@staticmethod

1843

2459

def fingerprint(openpgp):

1844

2460

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1845

2461

# New GnuTLS "datum" with the OpenPGP public key

1846

datum = (gnutls.library.types

1847

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

1848

ctypes.POINTER

1849

(ctypes.c_ubyte)),

1850

ctypes.c_uint(len(openpgp))))

2462

datum = gnutls.datum_t(

2463

ctypes.cast(ctypes.c_char_p(openpgp),

2464

ctypes.POINTER(ctypes.c_ubyte)),

2465

ctypes.c_uint(len(openpgp)))

1851

2466

# New empty GnuTLS certificate

1852

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1853

(gnutls.library.functions

1854

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2467

crt = gnutls.openpgp_crt_t()

2468

gnutls.openpgp_crt_init(ctypes.byref(crt))

1855

2469

# Import the OpenPGP public key into the certificate

1856

(gnutls.library.functions

1857

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

1858

gnutls.library.constants

1859

.GNUTLS_OPENPGP_FMT_RAW))

2470

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

2471

gnutls.OPENPGP_FMT_RAW)

1860

2472

# Verify the self signature in the key

1861

2473

crtverify = ctypes.c_uint()

1862

(gnutls.library.functions

1863

.gnutls_openpgp_crt_verify_self(crt, 0,

1864

ctypes.byref(crtverify)))

2474

gnutls.openpgp_crt_verify_self(crt, 0,

2475

ctypes.byref(crtverify))

1865

2476

if crtverify.value != 0:

1866

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1867

raise (gnutls.errors.CertificateSecurityError

1868

("Verify failed"))

2477

gnutls.openpgp_crt_deinit(crt)

2478

raise gnutls.CertificateSecurityError(code

2479

=crtverify.value)

1869

2480

# New buffer for the fingerprint

1870

2481

buf = ctypes.create_string_buffer(20)

1871

2482

buf_len = ctypes.c_size_t()

1872

2483

# Get the fingerprint from the certificate into the buffer

1873

(gnutls.library.functions

1874

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

1875

ctypes.byref(buf_len)))

2484

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

2485

ctypes.byref(buf_len))

1876

2486

# Deinit the certificate

1877

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2487

gnutls.openpgp_crt_deinit(crt)

1878

2488

# Convert the buffer to a Python bytestring

1879

2489

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

1880

2490

# Convert the bytestring to hexadecimal notation

1884

2494

1885

2495

class MultiprocessingMixIn(object):

1886

2496

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

2497

1887

2498

def sub_process_main(self, request, address):

1888

2499

try:

1889

2500

self.finish_request(request, address)

1890

2501

except Exception:

1891

2502

self.handle_error(request, address)

1892

2503

self.close_request(request)

1893

2504

1894

2505

def process_request(self, request, address):

1895

2506

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

1896

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

1897

args = (request, address))

2507

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

2508

args=(request, address))

1898

2509

proc.start()

1899

2510

return proc

1900

2511

1901

2512

1902

2513

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1903

2514

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

2515

1904

2516

def process_request(self, request, client_address):

1905

2517

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

1906

2518

1907

2519

This function creates a new pipe in self.pipe

1908

2520

"""

1909

2521

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1910

2522

1911

2523

proc = MultiprocessingMixIn.process_request(self, request,

1912

2524

client_address)

1913

2525

self.child_pipe.close()

1914

2526

self.add_pipe(parent_pipe, proc)

1915

2527

1916

2528

def add_pipe(self, parent_pipe, proc):

1917

2529

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

1918

raise NotImplementedError

2530

raise NotImplementedError()

1919

2531

1920

2532

1921

2533

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1922

2534

socketserver.TCPServer, object):

1923

2535

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

1924

2536

1925

2537

Attributes:

1926

2538

enabled: Boolean; whether this server is activated yet

1927

2539

interface: None or a network interface name (string)

1928

2540

use_ipv6: Boolean; to use IPv6 or not

1929

2541

"""

2542

1930

2543

def __init__(self, server_address, RequestHandlerClass,

1931

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

2544

interface=None,

2545

use_ipv6=True,

2546

socketfd=None):

1932

2547

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

1933

2548

creating a new one with socket.socket().

1934

2549

"""

1940

2555

self.socketfd = socketfd

1941

2556

# Save the original socket.socket() function

1942

2557

self.socket_socket = socket.socket

2558

1943

2559

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

1944

#

2560

#

1945

2561

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

1946

2562

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

1947

2563

# patching socket.socket.)

1948

#

2564

#

1949

2565

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

1950

2566

@functools.wraps(socket.socket)

1951

2567

def socket_wrapper(*args, **kwargs):

1963

2579

# socket_wrapper(), if socketfd was set.

1964

2580

socketserver.TCPServer.__init__(self, server_address,

1965

2581

RequestHandlerClass)

1966

2582

1967

2583

def server_bind(self):

1968

2584

"""This overrides the normal server_bind() function

1969

2585

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

1970

2586

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

2587

global SO_BINDTODEVICE

1971

2588

if self.interface is not None:

1972

2589

if SO_BINDTODEVICE is None:

1973

logger.error("SO_BINDTODEVICE does not exist;"

1974

" cannot bind to interface %s",

1975

self.interface)

1976

else:

1977

try:

1978

self.socket.setsockopt(socket.SOL_SOCKET,

1979

SO_BINDTODEVICE,

1980

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

1981

except socket.error as error:

1982

if error.errno == errno.EPERM:

1983

logger.error("No permission to bind to"

1984

" interface %s", self.interface)

1985

elif error.errno == errno.ENOPROTOOPT:

1986

logger.error("SO_BINDTODEVICE not available;"

1987

" cannot bind to interface %s",

1988

self.interface)

1989

elif error.errno == errno.ENODEV:

1990

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

1991

" cannot bind", self.interface)

1992

else:

1993

raise

2590

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

2591

# common enough.

2592

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

2593

SO_BINDTODEVICE = 25

2594

try:

2595

self.socket.setsockopt(

2596

socket.SOL_SOCKET, SO_BINDTODEVICE,

2597

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

2598

except socket.error as error:

2599

if error.errno == errno.EPERM:

2600

logger.error("No permission to bind to"

2601

" interface %s", self.interface)

2602

elif error.errno == errno.ENOPROTOOPT:

2603

logger.error("SO_BINDTODEVICE not available;"

2604

" cannot bind to interface %s",

2605

self.interface)

2606

elif error.errno == errno.ENODEV:

2607

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

2608

" cannot bind", self.interface)

2609

else:

2610

raise

1994

2611

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

1995

2612

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

2613

if self.server_address[1]:

2614

self.allow_reuse_address = True

1996

2615

if not self.server_address[0]:

1997

2616

if self.address_family == socket.AF_INET6:

1998

any_address = "::" # in6addr_any

2617

any_address = "::" # in6addr_any

1999

2618

else:

2000

any_address = "0.0.0.0" # INADDR_ANY

2619

any_address = "0.0.0.0" # INADDR_ANY

2001

2620

self.server_address = (any_address,

2002

2621

self.server_address[1])

2003

2622

elif not self.server_address[1]:

2004

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

2005

0)

2623

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

2006

2624

# if self.interface:

2007

2625

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

2008

2626

# 0, # port

2014

2632

2015

2633

class MandosServer(IPv6_TCPServer):

2016

2634

"""Mandos server.

2017

2635

2018

2636

Attributes:

2019

2637

clients: set of Client objects

2020

2638

gnutls_priority GnuTLS priority string

2021

2639

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

2022

2023

Assumes a gobject.MainLoop event loop.

2640

2641

Assumes a GLib.MainLoop event loop.

2024

2642

"""

2643

2025

2644

def __init__(self, server_address, RequestHandlerClass,

2026

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

2027

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

2645

interface=None,

2646

use_ipv6=True,

2647

clients=None,

2648

gnutls_priority=None,

2649

use_dbus=True,

2650

socketfd=None):

2028

2651

self.enabled = False

2029

2652

self.clients = clients

2030

2653

if self.clients is None:

2033

2656

self.gnutls_priority = gnutls_priority

2034

2657

IPv6_TCPServer.__init__(self, server_address,

2035

2658

RequestHandlerClass,

2036

interface = interface,

2037

use_ipv6 = use_ipv6,

2038

socketfd = socketfd)

2659

interface=interface,

2660

use_ipv6=use_ipv6,

2661

socketfd=socketfd)

2662

2039

2663

def server_activate(self):

2040

2664

if self.enabled:

2041

2665

return socketserver.TCPServer.server_activate(self)

2042

2666

2043

2667

def enable(self):

2044

2668

self.enabled = True

2045

2669

2046

2670

def add_pipe(self, parent_pipe, proc):

2047

2671

# Call "handle_ipc" for both data and EOF events

2048

gobject.io_add_watch(parent_pipe.fileno(),

2049

gobject.IO_IN | gobject.IO_HUP,

2050

functools.partial(self.handle_ipc,

2051

parent_pipe =

2052

parent_pipe,

2053

proc = proc))

2054

2055

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

2056

proc = None, client_object=None):

2672

GLib.io_add_watch(

2673

parent_pipe.fileno(),

2674

GLib.IO_IN | GLib.IO_HUP,

2675

functools.partial(self.handle_ipc,

2676

parent_pipe=parent_pipe,

2677

proc=proc))

2678

2679

def handle_ipc(self, source, condition,

2680

parent_pipe=None,

2681

proc=None,

2682

client_object=None):

2057

2683

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

2058

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

2684

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

2059

2685

# Wait for other process to exit

2060

2686

proc.join()

2061

2687

return False

2062

2688

2063

2689

# Read a request from the child

2064

2690

request = parent_pipe.recv()

2065

2691

command = request[0]

2066

2692

2067

2693

if command == 'init':

2068

fpr = request[1]

2069

address = request[2]

2070

2071

for c in self.clients.itervalues():

2072

if c.fingerprint == fpr:

2694

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

2695

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

2696

address = request[3]

2697

2698

for c in self.clients.values():

2699

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2700

continue

2701

if key_id and c.key_id == key_id:

2702

client = c

2703

break

2704

if fpr and c.fingerprint == fpr:

2073

2705

client = c

2074

2706

break

2075

2707

else:

2076

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

2077

"dress: %s", fpr, address)

2708

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

2709

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

2078

2710

if self.use_dbus:

2079

2711

# Emit D-Bus signal

2080

mandos_dbus_service.ClientNotFound(fpr,

2712

mandos_dbus_service.ClientNotFound(key_id or fpr,

2081

2713

address[0])

2082

2714

parent_pipe.send(False)

2083

2715

return False

2084

2085

gobject.io_add_watch(parent_pipe.fileno(),

2086

gobject.IO_IN | gobject.IO_HUP,

2087

functools.partial(self.handle_ipc,

2088

parent_pipe =

2089

parent_pipe,

2090

proc = proc,

2091

client_object =

2092

client))

2716

2717

GLib.io_add_watch(

2718

parent_pipe.fileno(),

2719

GLib.IO_IN | GLib.IO_HUP,

2720

functools.partial(self.handle_ipc,

2721

parent_pipe=parent_pipe,

2722

proc=proc,

2723

client_object=client))

2093

2724

parent_pipe.send(True)

2094

2725

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

2095

2726

# same fileno

2098

2729

funcname = request[1]

2099

2730

args = request[2]

2100

2731

kwargs = request[3]

2101

2732

2102

2733

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

2103

2734

funcname)(*args,

2104

**kwargs)))

2105

2735

**kwargs)))

2736

2106

2737

if command == 'getattr':

2107

2738

attrname = request[1]

2108

if callable(client_object.__getattribute__(attrname)):

2109

parent_pipe.send(('function',))

2739

if isinstance(client_object.__getattribute__(attrname),

2740

collections.Callable):

2741

parent_pipe.send(('function', ))

2110

2742

else:

2111

parent_pipe.send(('data', client_object

2112

.__getattribute__(attrname)))

2113

2743

parent_pipe.send((

2744

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

2745

2114

2746

if command == 'setattr':

2115

2747

attrname = request[1]

2116

2748

value = request[2]

2117

2749

setattr(client_object, attrname, value)

2118

2750

2119

2751

return True

2120

2752

2121

2753

2122

2754

def rfc3339_duration_to_delta(duration):

2123

2755

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

2124

2756

2125

2757

>>> rfc3339_duration_to_delta("P7D")

2126

2758

datetime.timedelta(7)

2127

2759

>>> rfc3339_duration_to_delta("PT60S")

2137

2769

>>> rfc3339_duration_to_delta("P1DT3M20S")

2138

2770

datetime.timedelta(1, 200)

2139

2771

"""

2140

2772

2141

2773

# Parsing an RFC 3339 duration with regular expressions is not

2142

2774

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

2143

2775

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

2144

2776

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

2145

2777

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

2146

2778

# avoid excessive use of external libraries.

2147

2779

2148

2780

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

2149

Token = collections.namedtuple("Token",

2150

("regexp", # To match token; if

2151

# "value" is not None,

2152

# must have a "group"

2153

# containing digits

2154

"value", # datetime.timedelta or

2155

# None

2156

"followers")) # Tokens valid after

2157

# this token

2781

Token = collections.namedtuple("Token", (

2782

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

2783

# a "group" containing digits

2784

"value", # datetime.timedelta or None

2785

"followers")) # Tokens valid after this token

2158

2786

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

2159

2787

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

2160

2788

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

2161

2789

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

2162

2790

datetime.timedelta(seconds=1),

2163

frozenset((token_end,)))

2791

frozenset((token_end, )))

2164

2792

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

2165

2793

datetime.timedelta(minutes=1),

2166

2794

frozenset((token_second, token_end)))

2182

2810

frozenset((token_month, token_end)))

2183

2811

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

2184

2812

datetime.timedelta(weeks=1),

2185

frozenset((token_end,)))

2813

frozenset((token_end, )))

2186

2814

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

2187

2815

frozenset((token_year, token_month,

2188

2816

token_day, token_time,

2189

token_week))),

2190

# Define starting values

2191

value = datetime.timedelta() # Value so far

2817

token_week)))

2818

# Define starting values:

2819

# Value so far

2820

value = datetime.timedelta()

2192

2821

found_token = None

2193

followers = frozenset(token_duration,) # Following valid tokens

2194

s = duration # String left to parse

2822

# Following valid tokens

2823

followers = frozenset((token_duration, ))

2824

# String left to parse

2825

s = duration

2195

2826

# Loop until end token is found

2196

2827

while found_token is not token_end:

2197

2828

# Search for any currently valid tokens

2213

2844

break

2214

2845

else:

2215

2846

# No currently valid tokens were found

2216

raise ValueError("Invalid RFC 3339 duration")

2847

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

2848

.format(duration))

2217

2849

# End token found

2218

2850

return value

2219

2851

2220

2852

2221

2853

def string_to_delta(interval):

2222

2854

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

2223

2855

2224

2856

>>> string_to_delta('7d')

2225

2857

datetime.timedelta(7)

2226

2858

>>> string_to_delta('60s')

2234

2866

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

2235

2867

datetime.timedelta(0, 330)

2236

2868

"""

2237

2869

2238

2870

try:

2239

2871

return rfc3339_duration_to_delta(interval)

2240

2872

except ValueError:

2241

2873

pass

2242

2874

2243

2875

timevalue = datetime.timedelta(0)

2244

2876

for s in interval.split():

2245

2877

try:

2246

suffix = unicode(s[-1])

2878

suffix = s[-1]

2247

2879

value = int(s[:-1])

2248

2880

if suffix == "d":

2249

2881

delta = datetime.timedelta(value)

2256

2888

elif suffix == "w":

2257

2889

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

2258

2890

else:

2259

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

2260

.format(suffix))

2261

except (ValueError, IndexError) as e:

2891

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

2892

except IndexError as e:

2262

2893

raise ValueError(*(e.args))

2263

2894

timevalue += delta

2264

2895

return timevalue

2265

2896

2266

2897

2267

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

2898

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

2268

2899

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

2269

2900

2270

2901

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

2271

2902

if os.fork():

2272

2903

sys.exit()

2280

2911

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

2281

2912

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

2282

2913

raise OSError(errno.ENODEV,

2283

"{0} not a character device"

2914

"{} not a character device"

2284

2915

.format(os.devnull))

2285

2916

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

2286

2917

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

2290

2921

2291

2922

2292

2923

def main():

2293

2924

2294

2925

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

2295

2926

# Parsing of options, both command line and config file

2296

2927

2297

2928

parser = argparse.ArgumentParser()

2298

2929

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

2299

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

2930

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

2300

2931

help="show version number and exit")

2301

2932

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

2302

2933

help="Bind to interface IF")

2335

2966

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

2336

2967

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

2337

2968

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

2338

2969

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

2970

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

2971

default=None)

2972

2339

2973

options = parser.parse_args()

2340

2974

2341

2975

if options.check:

2342

2976

import doctest

2343

doctest.testmod()

2344

sys.exit()

2345

2977

fail_count, test_count = doctest.testmod()

2978

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

2979

2346

2980

# Default values for config file for server-global settings

2347

server_defaults = { "interface": "",

2348

"address": "",

2349

"port": "",

2350

"debug": "False",

2351

"priority":

2352

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

2353

"servicename": "Mandos",

2354

"use_dbus": "True",

2355

"use_ipv6": "True",

2356

"debuglevel": "",

2357

"restore": "True",

2358

"socket": "",

2359

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

2360

"foreground": "False",

2361

}

2362

2981

if gnutls.has_rawpk:

2982

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

2983

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

2984

else:

2985

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

2986

":+SIGN-DSA-SHA256")

2987

server_defaults = {"interface": "",

2988

"address": "",

2989

"port": "",

2990

"debug": "False",

2991

"priority": priority,

2992

"servicename": "Mandos",

2993

"use_dbus": "True",

2994

"use_ipv6": "True",

2995

"debuglevel": "",

2996

"restore": "True",

2997

"socket": "",

2998

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

2999

"foreground": "False",

3000

"zeroconf": "True",

3001

}

3002

del priority

3003

2363

3004

# Parse config file for server-global settings

2364

server_config = configparser.SafeConfigParser(server_defaults)

3005

server_config = configparser.ConfigParser(server_defaults)

2365

3006

del server_defaults

2366

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

2367

"mandos.conf"))

2368

# Convert the SafeConfigParser object to a dict

3007

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

3008

# Convert the ConfigParser object to a dict

2369

3009

server_settings = server_config.defaults()

2370

3010

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

2371

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

3011

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

3012

"foreground", "zeroconf"):

2372

3013

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

2373

3014

option)

2374

3015

if server_settings["port"]:

2384

3025

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

2385

3026

["socket"])

2386

3027

del server_config

2387

3028

2388

3029

# Override the settings from the config file with command line

2389

3030

# options, if set.

2390

3031

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

2391

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

2392

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

2393

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

3032

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

3033

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

3034

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

2394

3035

value = getattr(options, option)

2395

3036

if value is not None:

2396

3037

server_settings[option] = value

2397

3038

del options

2398

3039

# Force all strings to be unicode

2399

3040

for option in server_settings.keys():

2400

if type(server_settings[option]) is str:

2401

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

3041

if isinstance(server_settings[option], bytes):

3042

server_settings[option] = (server_settings[option]

3043

.decode("utf-8"))

2402

3044

# Force all boolean options to be boolean

2403

3045

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

2404

"foreground"):

3046

"foreground", "zeroconf"):

2405

3047

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

2406

3048

# Debug implies foreground

2407

3049

if server_settings["debug"]:

2408

3050

server_settings["foreground"] = True

2409

3051

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

2410

3052

2411

3053

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

2412

3054

3055

if (not server_settings["zeroconf"]

3056

and not (server_settings["port"]

3057

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

3058

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

3059

2413

3060

# For convenience

2414

3061

debug = server_settings["debug"]

2415

3062

debuglevel = server_settings["debuglevel"]

2418

3065

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

2419

3066

stored_state_file)

2420

3067

foreground = server_settings["foreground"]

2421

3068

zeroconf = server_settings["zeroconf"]

3069

2422

3070

if debug:

2423

3071

initlogger(debug, logging.DEBUG)

2424

3072

else:

2427

3075

else:

2428

3076

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

2429

3077

initlogger(debug, level)

2430

3078

2431

3079

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

2432

syslogger.setFormatter(logging.Formatter

2433

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

2434

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

2435

.format(server_settings

2436

["servicename"])))

2437

3080

syslogger.setFormatter(

3081

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

3082

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

3083

server_settings["servicename"])))

3084

2438

3085

# Parse config file with clients

2439

client_config = configparser.SafeConfigParser(Client

2440

.client_defaults)

3086

client_config = configparser.ConfigParser(Client.client_defaults)

2441

3087

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

2442

3088

"clients.conf"))

2443

3089

2444

3090

global mandos_dbus_service

2445

3091

mandos_dbus_service = None

2446

2447

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

2448

server_settings["port"]),

2449

ClientHandler,

2450

interface=(server_settings["interface"]

2451

or None),

2452

use_ipv6=use_ipv6,

2453

gnutls_priority=

2454

server_settings["priority"],

2455

use_dbus=use_dbus,

2456

socketfd=(server_settings["socket"]

2457

or None))

3092

3093

socketfd = None

3094

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

3095

socketfd = server_settings["socket"]

3096

tcp_server = MandosServer(

3097

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

3098

ClientHandler,

3099

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

3100

use_ipv6=use_ipv6,

3101

gnutls_priority=server_settings["priority"],

3102

use_dbus=use_dbus,

3103

socketfd=socketfd)

2458

3104

if not foreground:

2459

3105

pidfilename = "/run/mandos.pid"

3106

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

3107

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

2460

3108

pidfile = None

2461

3109

try:

2462

pidfile = open(pidfilename, "w")

3110

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

2463

3111

except IOError as e:

2464

3112

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

2465

3113

exc_info=e)

2466

2467

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

3114

3115

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

3116

("mandos", "mandos"),

3117

("nobody", "nogroup")):

2468

3118

try:

2469

3119

uid = pwd.getpwnam(name).pw_uid

2470

gid = pwd.getpwnam(name).pw_gid

3120

gid = pwd.getpwnam(group).pw_gid

2471

3121

break

2472

3122

except KeyError:

2473

3123

continue

2477

3127

try:

2478

3128

os.setgid(gid)

2479

3129

os.setuid(uid)

3130

if debug:

3131

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

3132

gid))

2480

3133

except OSError as error:

3134

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

3135

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

2481

3136

if error.errno != errno.EPERM:

2482

raise error

2483

3137

raise

3138

2484

3139

if debug:

2485

3140

# Enable all possible GnuTLS debugging

2486

3141

2487

3142

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

2488

3143

# - GnuTLS manual

2489

gnutls.library.functions.gnutls_global_set_log_level(11)

2490

2491

@gnutls.library.types.gnutls_log_func

3144

gnutls.global_set_log_level(11)

3145

3146

@gnutls.log_func

2492

3147

def debug_gnutls(level, string):

2493

3148

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

2494

2495

(gnutls.library.functions

2496

.gnutls_global_set_log_function(debug_gnutls))

2497

3149

3150

gnutls.global_set_log_function(debug_gnutls)

3151

2498

3152

# Redirect stdin so all checkers get /dev/null

2499

3153

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

2500

3154

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

2501

3155

if null > 2:

2502

3156

os.close(null)

2503

3157

2504

3158

# Need to fork before connecting to D-Bus

2505

3159

if not foreground:

2506

3160

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

2507

3161

daemon()

2508

2509

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

2510

# need to inform gobject that threads will be used.

2511

gobject.threads_init()

2512

3162

3163

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

3164

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

3165

# need to inform GLib that threads will be used.

3166

GLib.threads_init()

3167

2513

3168

global main_loop

2514

3169

# From the Avahi example code

2515

3170

DBusGMainLoop(set_as_default=True)

2516

main_loop = gobject.MainLoop()

3171

main_loop = GLib.MainLoop()

2517

3172

bus = dbus.SystemBus()

2518

3173

# End of Avahi example code

2519

3174

if use_dbus:

2520

3175

try:

2521

3176

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

2522

bus, do_not_queue=True)

2523

old_bus_name = (dbus.service.BusName

2524

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

2525

do_not_queue=True))

2526

except dbus.exceptions.NameExistsException as e:

3177

bus,

3178

do_not_queue=True)

3179

old_bus_name = dbus.service.BusName(

3180

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

3181

do_not_queue=True)

3182

except dbus.exceptions.DBusException as e:

2527

3183

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

2528

3184

use_dbus = False

2529

3185

server_settings["use_dbus"] = False

2530

3186

tcp_server.use_dbus = False

2531

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2532

service = AvahiServiceToSyslog(name =

2533

server_settings["servicename"],

2534

servicetype = "_mandos._tcp",

2535

protocol = protocol, bus = bus)

2536

if server_settings["interface"]:

2537

service.interface = (if_nametoindex

2538

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

2539

3187

if zeroconf:

3188

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3189

service = AvahiServiceToSyslog(

3190

name=server_settings["servicename"],

3191

servicetype="_mandos._tcp",

3192

protocol=protocol,

3193

bus=bus)

3194

if server_settings["interface"]:

3195

service.interface = if_nametoindex(

3196

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

3197

2540

3198

global multiprocessing_manager

2541

3199

multiprocessing_manager = multiprocessing.Manager()

2542

3200

2543

3201

client_class = Client

2544

3202

if use_dbus:

2545

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

2546

3203

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

3204

2547

3205

client_settings = Client.config_parser(client_config)

2548

3206

old_client_settings = {}

2549

3207

clients_data = {}

2550

3208

2551

3209

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

2552

3210

global wnull

2553

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

3211

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

2554

3212

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

2555

3213

# mode

2556

3214

if debug or not foreground:

2557

3215

wnull.close()

2558

3216

2559

3217

# Get client data and settings from last running state.

2560

3218

if server_settings["restore"]:

2561

3219

try:

2562

3220

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

2563

clients_data, old_client_settings = (pickle.load

2564

(stored_state))

3221

if sys.version_info.major == 2:

3222

clients_data, old_client_settings = pickle.load(

3223

stored_state)

3224

else:

3225

bytes_clients_data, bytes_old_client_settings = (

3226

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

3227

# Fix bytes to strings

3228

# clients_data

3229

# .keys()

3230

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

3231

if isinstance(key, bytes)

3232

else key): value

3233

for key, value in

3234

bytes_clients_data.items()}

3235

del bytes_clients_data

3236

for key in clients_data:

3237

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

3238

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

3239

for k, v in

3240

clients_data[key].items()}

3241

clients_data[key] = value

3242

# .client_structure

3243

value["client_structure"] = [

3244

(s.decode("utf-8")

3245

if isinstance(s, bytes)

3246

else s) for s in

3247

value["client_structure"]]

3248

# .name & .host

3249

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

3250

if isinstance(value[k], bytes):

3251

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

3252

if "key_id" not in value:

3253

value["key_id"] = ""

3254

elif "fingerprint" not in value:

3255

value["fingerprint"] = ""

3256

# old_client_settings

3257

# .keys()

3258

old_client_settings = {

3259

(key.decode("utf-8")

3260

if isinstance(key, bytes)

3261

else key): value

3262

for key, value in

3263

bytes_old_client_settings.items()}

3264

del bytes_old_client_settings

3265

# .host

3266

for value in old_client_settings.values():

3267

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

3268

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

3269

.decode("utf-8"))

2565

3270

os.remove(stored_state_path)

2566

3271

except IOError as e:

2567

3272

if e.errno == errno.ENOENT:

2568

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

2569

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

3273

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

3274

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

2570

3275

else:

2571

3276

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

2572

3277

exc_info=e)

2573

3278

raise

2574

3279

except EOFError as e:

2575

3280

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

2576

"EOFError:", exc_info=e)

2577

3281

"EOFError:",

3282

exc_info=e)

3283

2578

3284

with PGPEngine() as pgp:

2579

for client_name, client in clients_data.iteritems():

3285

for client_name, client in clients_data.items():

2580

3286

# Skip removed clients

2581

3287

if client_name not in client_settings:

2582

3288

continue

2583

3289

2584

3290

# Decide which value to use after restoring saved state.

2585

3291

# We have three different values: Old config file,

2586

3292

# new config file, and saved state.

2591

3297

# For each value in new config, check if it

2592

3298

# differs from the old config value (Except for

2593

3299

# the "secret" attribute)

2594

if (name != "secret" and

2595

value != old_client_settings[client_name]

2596

[name]):

3300

if (name != "secret"

3301

and (value !=

3302

old_client_settings[client_name][name])):

2597

3303

client[name] = value

2598

3304

except KeyError:

2599

3305

pass

2600

3306

2601

3307

# Clients who has passed its expire date can still be

2602

# enabled if its last checker was successful. Clients

3308

# enabled if its last checker was successful. A Client

2603

3309

# whose checker succeeded before we stored its state is

2604

3310

# assumed to have successfully run all checkers during

2605

3311

# downtime.

2607

3313

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

2608

3314

if not client["last_checked_ok"]:

2609

3315

logger.warning(

2610

"disabling client {0} - Client never "

2611

"performed a successful checker"

2612

.format(client_name))

3316

"disabling client {} - Client never "

3317

"performed a successful checker".format(

3318

client_name))

2613

3319

client["enabled"] = False

2614

3320

elif client["last_checker_status"] != 0:

2615

3321

logger.warning(

2616

"disabling client {0} - Client "

2617

"last checker failed with error code {1}"

2618

.format(client_name,

2619

client["last_checker_status"]))

3322

"disabling client {} - Client last"

3323

" checker failed with error code"

3324

" {}".format(

3325

client_name,

3326

client["last_checker_status"]))

2620

3327

client["enabled"] = False

2621

3328

else:

2622

client["expires"] = (datetime.datetime

2623

.utcnow()

2624

+ client["timeout"])

3329

client["expires"] = (

3330

datetime.datetime.utcnow()

3331

+ client["timeout"])

2625

3332

logger.debug("Last checker succeeded,"

2626

" keeping {0} enabled"

2627

.format(client_name))

3333

" keeping {} enabled".format(

3334

client_name))

2628

3335

try:

2629

client["secret"] = (

2630

pgp.decrypt(client["encrypted_secret"],

2631

client_settings[client_name]

2632

["secret"]))

3336

client["secret"] = pgp.decrypt(

3337

client["encrypted_secret"],

3338

client_settings[client_name]["secret"])

2633

3339

except PGPError:

2634

3340

# If decryption fails, we use secret from new settings

2635

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

2636

.format(client_name))

2637

client["secret"] = (

2638

client_settings[client_name]["secret"])

2639

3341

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

3342

client_name))

3343

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

3344

["secret"])

3345

2640

3346

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

2641

3347

for client_name in (set(old_client_settings)

2642

3348

- set(client_settings)):

2644

3350

for client_name in (set(client_settings)

2645

3351

- set(old_client_settings)):

2646

3352

clients_data[client_name] = client_settings[client_name]

2647

3353

2648

3354

# Create all client objects

2649

for client_name, client in clients_data.iteritems():

3355

for client_name, client in clients_data.items():

2650

3356

tcp_server.clients[client_name] = client_class(

2651

name = client_name, settings = client,

2652

server_settings = server_settings)

2653

3357

name=client_name,

3358

settings=client,

3359

server_settings=server_settings)

3360

2654

3361

if not tcp_server.clients:

2655

3362

logger.warning("No clients defined")

2656

3363

2657

3364

if not foreground:

2658

3365

if pidfile is not None:

3366

pid = os.getpid()

2659

3367

try:

2660

3368

with pidfile:

2661

pid = os.getpid()

2662

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

3369

print(pid, file=pidfile)

2663

3370

except IOError:

2664

3371

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

2665

3372

pidfilename, pid)

2666

3373

del pidfile

2667

3374

del pidfilename

2668

2669

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

2670

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

2671

3375

3376

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

3377

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3378

lambda: main_loop.quit() and False)

3379

2672

3380

if use_dbus:

2673

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

2674

"se.bsnet.fukt.Mandos"})

2675

class MandosDBusService(DBusObjectWithProperties):

3381

3382

@alternate_dbus_interfaces(

3383

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

3384

class MandosDBusService(DBusObjectWithObjectManager):

2676

3385

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

3386

2677

3387

def __init__(self):

2678

3388

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

3389

2679

3390

_interface = "se.recompile.Mandos"

2680

2681

@dbus_interface_annotations(_interface)

2682

def _foo(self):

2683

return { "org.freedesktop.DBus.Property"

2684

".EmitsChangedSignal":

2685

"false"}

2686

3391

2687

3392

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

2688

3393

def ClientAdded(self, objpath):

2689

3394

"D-Bus signal"

2690

3395

pass

2691

3396

2692

3397

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

2693

def ClientNotFound(self, fingerprint, address):

3398

def ClientNotFound(self, key_id, address):

2694

3399

"D-Bus signal"

2695

3400

pass

2696

3401

3402

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

3403

"true"})

2697

3404

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

2698

3405

def ClientRemoved(self, objpath, name):

2699

3406

"D-Bus signal"

2700

3407

pass

2701

3408

3409

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

3410

"true"})

2702

3411

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

2703

3412

def GetAllClients(self):

2704

3413

"D-Bus method"

2705

return dbus.Array(c.dbus_object_path

2706

for c in

2707

tcp_server.clients.itervalues())

2708

3414

return dbus.Array(c.dbus_object_path for c in

3415

tcp_server.clients.values())

3416

3417

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

3418

"true"})

2709

3419

@dbus.service.method(_interface,

2710

3420

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

2711

3421

def GetAllClientsWithProperties(self):

2712

3422

"D-Bus method"

2713

3423

return dbus.Dictionary(

2714

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

2715

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

3424

{c.dbus_object_path: c.GetAll(

3425

"se.recompile.Mandos.Client")

3426

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

2716

3427

signature="oa{sv}")

2717

3428

2718

3429

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

2719

3430

def RemoveClient(self, object_path):

2720

3431

"D-Bus method"

2721

for c in tcp_server.clients.itervalues():

3432

for c in tcp_server.clients.values():

2722

3433

if c.dbus_object_path == object_path:

2723

3434

del tcp_server.clients[c.name]

2724

3435

c.remove_from_connection()

2725

# Don't signal anything except ClientRemoved

3436

# Don't signal the disabling

2726

3437

c.disable(quiet=True)

2727

# Emit D-Bus signal

2728

self.ClientRemoved(object_path, c.name)

3438

# Emit D-Bus signal for removal

3439

self.client_removed_signal(c)

2729

3440

return

2730

3441

raise KeyError(object_path)

2731

3442

2732

3443

del _interface

2733

3444

3445

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3446

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

3447

def GetManagedObjects(self):

3448

"""D-Bus method"""

3449

return dbus.Dictionary(

3450

{client.dbus_object_path:

3451

dbus.Dictionary(

3452

{interface: client.GetAll(interface)

3453

for interface in

3454

client._get_all_interface_names()})

3455

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

3456

3457

def client_added_signal(self, client):

3458

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

3459

if use_dbus:

3460

# New standard signal

3461

self.InterfacesAdded(

3462

client.dbus_object_path,

3463

dbus.Dictionary(

3464

{interface: client.GetAll(interface)

3465

for interface in

3466

client._get_all_interface_names()}))

3467

# Old signal

3468

self.ClientAdded(client.dbus_object_path)

3469

3470

def client_removed_signal(self, client):

3471

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

3472

if use_dbus:

3473

# New standard signal

3474

self.InterfacesRemoved(

3475

client.dbus_object_path,

3476

client._get_all_interface_names())

3477

# Old signal

3478

self.ClientRemoved(client.dbus_object_path,

3479

client.name)

3480

2734

3481

mandos_dbus_service = MandosDBusService()

2735

3482

3483

# Save modules to variables to exempt the modules from being

3484

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

3485

mp = multiprocessing

3486

wn = wnull

3487

2736

3488

def cleanup():

2737

3489

"Cleanup function; run on exit"

2738

service.cleanup()

2739

2740

multiprocessing.active_children()

2741

wnull.close()

3490

if zeroconf:

3491

service.cleanup()

3492

3493

mp.active_children()

3494

wn.close()

2742

3495

if not (tcp_server.clients or client_settings):

2743

3496

return

2744

3497

2745

3498

# Store client before exiting. Secrets are encrypted with key

2746

3499

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

2747

3500

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

2748

3501

clients = {}

2749

3502

with PGPEngine() as pgp:

2750

for client in tcp_server.clients.itervalues():

3503

for client in tcp_server.clients.values():

2751

3504

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

2752

3505

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

2753

3506

key)

2754

3507

client_dict = {}

2755

3508

2756

3509

# A list of attributes that can not be pickled

2757

3510

# + secret.

2758

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

2759

"checker", "server_settings"))

2760

for name, typ in (inspect.getmembers

2761

(dbus.service.Object)):

3511

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

3512

"checker", "server_settings"}

3513

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

3514

.Object):

2762

3515

exclude.add(name)

2763

3516

2764

3517

client_dict["encrypted_secret"] = (client

2765

3518

.encrypted_secret)

2766

3519

for attr in client.client_structure:

2767

3520

if attr not in exclude:

2768

3521

client_dict[attr] = getattr(client, attr)

2769

3522

2770

3523

clients[client.name] = client_dict

2771

3524

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

2772

3525

2773

3526

try:

2774

with (tempfile.NamedTemporaryFile

2775

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

2776

dir=os.path.dirname(stored_state_path),

2777

delete=False)) as stored_state:

2778

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

2779

tempname=stored_state.name

3527

with tempfile.NamedTemporaryFile(

3528

mode='wb',

3529

suffix=".pickle",

3530

prefix='clients-',

3531

dir=os.path.dirname(stored_state_path),

3532

delete=False) as stored_state:

3533

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

3534

protocol=2)

3535

tempname = stored_state.name

2780

3536

os.rename(tempname, stored_state_path)

2781

3537

except (IOError, OSError) as e:

2782

3538

if not debug:

2785

3541

except NameError:

2786

3542

pass

2787

3543

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

2788

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

3544

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

2789

3545

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

2790

3546

else:

2791

3547

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

2792

3548

exc_info=e)

2793

raise e

2794

3549

raise

3550

2795

3551

# Delete all clients, and settings from config

2796

3552

while tcp_server.clients:

2797

3553

name, client = tcp_server.clients.popitem()

2798

3554

if use_dbus:

2799

3555

client.remove_from_connection()

2800

# Don't signal anything except ClientRemoved

3556

# Don't signal the disabling

2801

3557

client.disable(quiet=True)

3558

# Emit D-Bus signal for removal

2802

3559

if use_dbus:

2803

# Emit D-Bus signal

2804

mandos_dbus_service.ClientRemoved(client

2805

.dbus_object_path,

2806

client.name)

3560

mandos_dbus_service.client_removed_signal(client)

2807

3561

client_settings.clear()

2808

3562

2809

3563

atexit.register(cleanup)

2810

2811

for client in tcp_server.clients.itervalues():

3564

3565

for client in tcp_server.clients.values():

2812

3566

if use_dbus:

2813

# Emit D-Bus signal

2814

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3567

# Emit D-Bus signal for adding

3568

mandos_dbus_service.client_added_signal(client)

2815

3569

# Need to initiate checking of clients

2816

3570

if client.enabled:

2817

3571

client.init_checker()

2818

3572

2819

3573

tcp_server.enable()

2820

3574

tcp_server.server_activate()

2821

3575

2822

3576

# Find out what port we got

2823

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

3577

if zeroconf:

3578

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

2824

3579

if use_ipv6:

2825

3580

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

2826

3581

" flowinfo %d, scope_id %d",

2828

3583

else: # IPv4

2829

3584

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

2830

3585

*tcp_server.socket.getsockname())

2831

2832

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

2833

3586

3587

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

3588

2834

3589

try:

2835

# From the Avahi example code

2836

try:

2837

service.activate()

2838

except dbus.exceptions.DBusException as error:

2839

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

2840

cleanup()

2841

sys.exit(1)

2842

# End of Avahi example code

2843

2844

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

2845

lambda *args, **kwargs:

2846

(tcp_server.handle_request

2847

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

2848

3590

if zeroconf:

3591

# From the Avahi example code

3592

try:

3593

service.activate()

3594

except dbus.exceptions.DBusException as error:

3595

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

3596

cleanup()

3597

sys.exit(1)

3598

# End of Avahi example code

3599

3600

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

3601

lambda *args, **kwargs:

3602

(tcp_server.handle_request

3603

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

3604

2849

3605

logger.debug("Starting main loop")

2850

3606

main_loop.run()

2851

3607

except AvahiError as error:

2860

3616

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

2861

3617

cleanup()

2862

3618

3619

2863

3620

if __name__ == '__main__':

2864

3621

main()