/mandos/release : revision 237.7.159

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#!/usr/bin/python

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

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#

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#

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

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#

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#

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

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# service publisher, downloaded from

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

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

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

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

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#

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#

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# Everything else is

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#

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# This file is part of Mandos.

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#

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

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

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#

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

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

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

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# (at your option) any later version.

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#

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

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# WITHOUT ANY WARRANTY; without even the implied warranty of

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

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

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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# GNU General Public License for more details.

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#

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#

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

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

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#

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# along with this program. If not, see

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

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#

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

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#

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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try:

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from future_builtins import *

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except ImportError:

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pass

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from future_builtins import *

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import SocketServer as socketserver

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import socket

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import argparse

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import datetime

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import errno

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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import sys

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import re

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import os

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import struct

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import fcntl

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import functools

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import dbus

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import dbus.service

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from gi.repository import GLib

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import gobject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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import GnuPGInterface

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# Try to find the value of SO_BINDTODEVICE:

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try:

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

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

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except AttributeError:

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try:

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# This is where SO_BINDTODEVICE was up to and including Python

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# 2.6, and also 3.2:

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from IN import SO_BINDTODEVICE

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except ImportError:

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

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# Try running the C preprocessor:

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try:

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

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"/dev/stdin"],

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE)

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stdout = cc.communicate(

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

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

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except (OSError, ValueError, IndexError):

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# No value found

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.8.4"

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SO_BINDTODEVICE = None

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version = "1.6.0"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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try:

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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def copy_function(func):

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

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility=logging.handlers.SysLogHandler.LOG_DAEMON,

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address="/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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class PGPEngine(object):

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

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def __init__(self):

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self.gnupg = GnuPGInterface.GnuPG()

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

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == "gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet']

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

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

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

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self.gnupg = GnuPGInterface.GnuPG()

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self.gnupg.options.meta_interactive = False

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self.gnupg.options.homedir = self.tempdir

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

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'--quiet',

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'--no-use-agent'])

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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213

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown=False):

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topdown = False):

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for filename in files:

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

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for dirname in dirs:

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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def password_encode(self, password):

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

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

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

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if len(encoded) > 2048:

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

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

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

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

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return encoded

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

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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

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with open(os.devnull, "w") as devnull:

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try:

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proc = self.gnupg.run(['--symmetric'],

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create_fhs=['stdin', 'stdout'],

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attach_fhs={'stderr': devnull})

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with contextlib.closing(proc.handles['stdin']) as f:

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f.write(data)

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with contextlib.closing(proc.handles['stdout']) as f:

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ciphertext = f.read()

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proc.wait()

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except IOError as e:

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raise PGPError(e)

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self.gnupg.passphrase = None

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return ciphertext

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258

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def decrypt(self, data, password):

259

passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

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if proc.returncode != 0:

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raise PGPError(err)

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

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with open(os.devnull, "w") as devnull:

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try:

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proc = self.gnupg.run(['--decrypt'],

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create_fhs=['stdin', 'stdout'],

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attach_fhs={'stderr': devnull})

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with contextlib.closing(proc.handles['stdin']) as f:

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f.write(data)

206

with contextlib.closing(proc.handles['stdout']) as f:

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decrypted_plaintext = f.read()

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proc.wait()

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except IOError as e:

210

raise PGPError(e)

211

self.gnupg.passphrase = None

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return decrypted_plaintext

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# Pretend that we have an Avahi module

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class avahi(object):

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

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

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

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

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DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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@staticmethod

290

def string_array_to_txt_array(t):

291

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

292

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

293

ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

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ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

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SERVER_INVALID = 0 # avahi-common/defs.h

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SERVER_REGISTERING = 1 # avahi-common/defs.h

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SERVER_RUNNING = 2 # avahi-common/defs.h

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SERVER_COLLISION = 3 # avahi-common/defs.h

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SERVER_FAILURE = 4 # avahi-common/defs.h

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302

303

215

class AvahiError(Exception):

304

216

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

305

217

self.value = value

306

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

307

**kwargs)

308

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

219

def __unicode__(self):

220

return unicode(repr(self.value))

309

221

310

222

class AvahiServiceError(AvahiError):

311

223

pass

312

224

313

314

225

class AvahiGroupError(AvahiError):

315

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pass

316

227

317

228

318

229

class AvahiService(object):

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230

"""An Avahi (Zeroconf) service.

320

231

321

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Attributes:

322

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

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Used to optionally bind to the specified interface.

324

235

name: string; Example: 'Mandos'

325

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

326

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

237

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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server: D-Bus Server

336

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bus: dbus.SystemBus()

337

248

"""

338

339

def __init__(self,

340

interface=avahi.IF_UNSPEC,

341

name=None,

342

servicetype=None,

343

port=None,

344

TXT=None,

345

domain="",

346

host="",

347

max_renames=32768,

348

protocol=avahi.PROTO_UNSPEC,

349

bus=None):

249

250

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

251

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

252

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

253

protocol = avahi.PROTO_UNSPEC, bus = None):

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254

self.interface = interface

351

255

self.name = name

352

256

self.type = servicetype

361

265

self.server = None

362

266

self.bus = bus

363

267

self.entry_group_state_changed_match = None

364

365

def rename(self, remove=True):

268

269

def rename(self):

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270

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

367

271

if self.rename_count >= self.max_renames:

368

272

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

369

273

" after %i retries, exiting.",

370

274

self.rename_count)

371

275

raise AvahiServiceError("Too many renames")

372

self.name = str(

373

self.server.GetAlternativeServiceName(self.name))

374

self.rename_count += 1

276

self.name = unicode(self.server

277

.GetAlternativeServiceName(self.name))

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

376

279

self.name)

377

if remove:

378

self.remove()

280

self.remove()

379

281

try:

380

282

self.add()

381

283

except dbus.exceptions.DBusException as error:

382

if (error.get_dbus_name()

383

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

384

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

385

return self.rename(remove=False)

386

else:

387

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

388

self.cleanup()

389

os._exit(1)

390

284

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

285

self.cleanup()

286

os._exit(1)

287

self.rename_count += 1

288

391

289

def remove(self):

392

290

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

393

291

if self.entry_group_state_changed_match is not None:

395

293

self.entry_group_state_changed_match = None

396

294

if self.group is not None:

397

295

self.group.Reset()

398

296

399

297

def add(self):

400

298

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

401

299

self.remove()

418

316

dbus.UInt16(self.port),

419

317

avahi.string_array_to_txt_array(self.TXT))

420

318

self.group.Commit()

421

319

422

320

def entry_group_state_changed(self, state, error):

423

321

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

424

322

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

425

323

426

324

if state == avahi.ENTRY_GROUP_ESTABLISHED:

427

325

logger.debug("Zeroconf service established.")

428

326

elif state == avahi.ENTRY_GROUP_COLLISION:

430

328

self.rename()

431

329

elif state == avahi.ENTRY_GROUP_FAILURE:

432

330

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

433

str(error))

434

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

435

331

unicode(error))

332

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

333

.format(error))

334

436

335

def cleanup(self):

437

336

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

438

337

if self.group is not None:

443

342

pass

444

343

self.group = None

445

344

self.remove()

446

345

447

346

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

448

347

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

449

348

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

450

bad_states = {

451

avahi.SERVER_INVALID: "Zeroconf server invalid",

452

avahi.SERVER_REGISTERING: None,

453

avahi.SERVER_COLLISION: "Zeroconf server name collision",

454

avahi.SERVER_FAILURE: "Zeroconf server failure",

455

}

349

bad_states = { avahi.SERVER_INVALID:

350

"Zeroconf server invalid",

351

avahi.SERVER_REGISTERING: None,

352

avahi.SERVER_COLLISION:

353

"Zeroconf server name collision",

354

avahi.SERVER_FAILURE:

355

"Zeroconf server failure" }

456

356

if state in bad_states:

457

357

if bad_states[state] is not None:

458

358

if error is None:

461

361

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

462

362

self.cleanup()

463

363

elif state == avahi.SERVER_RUNNING:

464

try:

465

self.add()

466

except dbus.exceptions.DBusException as error:

467

if (error.get_dbus_name()

468

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

469

logger.info("Local Zeroconf service name"

470

" collision.")

471

return self.rename(remove=False)

472

else:

473

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

474

self.cleanup()

475

os._exit(1)

364

self.add()

476

365

else:

477

366

if error is None:

478

367

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

479

368

else:

480

369

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

481

370

482

371

def activate(self):

483

372

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

484

373

if self.server is None:

488

377

follow_name_owner_changes=True),

489

378

avahi.DBUS_INTERFACE_SERVER)

490

379

self.server.connect_to_signal("StateChanged",

491

self.server_state_changed)

380

self.server_state_changed)

492

381

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

493

382

494

383

495

384

class AvahiServiceToSyslog(AvahiService):

496

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

385

def rename(self):

497

386

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

498

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

499

syslogger.setFormatter(logging.Formatter(

500

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

501

.format(self.name)))

387

ret = AvahiService.rename(self)

388

syslogger.setFormatter(logging.Formatter

389

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

390

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

391

.format(self.name)))

502

392

return ret

503

393

504

394

505

# Pretend that we have a GnuTLS module

506

class gnutls(object):

507

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

508

509

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

510

if library is None:

511

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

512

_library = ctypes.cdll.LoadLibrary(library)

513

del library

514

515

# Unless otherwise indicated, the constants and types below are

516

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

517

518

# Constants

519

E_SUCCESS = 0

520

E_INTERRUPTED = -52

521

E_AGAIN = -28

522

CRT_OPENPGP = 2

523

CRT_RAWPK = 3

524

CLIENT = 2

525

SHUT_RDWR = 0

526

CRD_CERTIFICATE = 1

527

E_NO_CERTIFICATE_FOUND = -49

528

X509_FMT_DER = 0

529

NO_TICKETS = 1<<10

530

ENABLE_RAWPK = 1<<18

531

CTYPE_PEERS = 3

532

KEYID_USE_SHA256 = 1 # gnutls/x509.h

533

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

534

535

# Types

536

class session_int(ctypes.Structure):

537

_fields_ = []

538

session_t = ctypes.POINTER(session_int)

539

540

class certificate_credentials_st(ctypes.Structure):

541

_fields_ = []

542

certificate_credentials_t = ctypes.POINTER(

543

certificate_credentials_st)

544

certificate_type_t = ctypes.c_int

545

546

class datum_t(ctypes.Structure):

547

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

548

('size', ctypes.c_uint)]

549

550

class openpgp_crt_int(ctypes.Structure):

551

_fields_ = []

552

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

553

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

554

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

555

credentials_type_t = ctypes.c_int

556

transport_ptr_t = ctypes.c_void_p

557

close_request_t = ctypes.c_int

558

559

# Exceptions

560

class Error(Exception):

561

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

562

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

563

# code is passed, convert it to a string with

564

# gnutls.strerror()

565

self.code = code

566

if message is None and code is not None:

567

message = gnutls.strerror(code)

568

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

569

message, *args)

570

571

class CertificateSecurityError(Error):

572

pass

573

574

# Classes

575

class Credentials(object):

576

def __init__(self):

577

self._c_object = gnutls.certificate_credentials_t()

578

gnutls.certificate_allocate_credentials(

579

ctypes.byref(self._c_object))

580

self.type = gnutls.CRD_CERTIFICATE

581

582

def __del__(self):

583

gnutls.certificate_free_credentials(self._c_object)

584

585

class ClientSession(object):

586

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

587

self._c_object = gnutls.session_t()

588

gnutls_flags = gnutls.CLIENT

589

if gnutls.check_version(b"3.5.6"):

590

gnutls_flags |= gnutls.NO_TICKETS

591

if gnutls.has_rawpk:

592

gnutls_flags |= gnutls.ENABLE_RAWPK

593

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

594

del gnutls_flags

595

gnutls.set_default_priority(self._c_object)

596

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

597

gnutls.handshake_set_private_extensions(self._c_object,

598

True)

599

self.socket = socket

600

if credentials is None:

601

credentials = gnutls.Credentials()

602

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

603

ctypes.cast(credentials._c_object,

604

ctypes.c_void_p))

605

self.credentials = credentials

606

607

def __del__(self):

608

gnutls.deinit(self._c_object)

609

610

def handshake(self):

611

return gnutls.handshake(self._c_object)

612

613

def send(self, data):

614

data = bytes(data)

615

data_len = len(data)

616

while data_len > 0:

617

data_len -= gnutls.record_send(self._c_object,

618

data[-data_len:],

619

data_len)

620

621

def bye(self):

622

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

623

624

# Error handling functions

625

def _error_code(result):

626

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

627

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

628

if result >= 0:

629

return result

630

if result == gnutls.E_NO_CERTIFICATE_FOUND:

631

raise gnutls.CertificateSecurityError(code=result)

632

raise gnutls.Error(code=result)

633

634

def _retry_on_error(result, func, arguments):

635

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

636

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

637

while result < 0:

638

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

639

return _error_code(result)

640

result = func(*arguments)

641

return result

642

643

# Unless otherwise indicated, the function declarations below are

644

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

645

646

# Functions

647

priority_set_direct = _library.gnutls_priority_set_direct

648

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

649

ctypes.POINTER(ctypes.c_char_p)]

650

priority_set_direct.restype = _error_code

651

652

init = _library.gnutls_init

653

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

654

init.restype = _error_code

655

656

set_default_priority = _library.gnutls_set_default_priority

657

set_default_priority.argtypes = [session_t]

658

set_default_priority.restype = _error_code

659

660

record_send = _library.gnutls_record_send

661

record_send.argtypes = [session_t, ctypes.c_void_p,

662

ctypes.c_size_t]

663

record_send.restype = ctypes.c_ssize_t

664

record_send.errcheck = _retry_on_error

665

666

certificate_allocate_credentials = (

667

_library.gnutls_certificate_allocate_credentials)

668

certificate_allocate_credentials.argtypes = [

669

ctypes.POINTER(certificate_credentials_t)]

670

certificate_allocate_credentials.restype = _error_code

671

672

certificate_free_credentials = (

673

_library.gnutls_certificate_free_credentials)

674

certificate_free_credentials.argtypes = [

675

certificate_credentials_t]

676

certificate_free_credentials.restype = None

677

678

handshake_set_private_extensions = (

679

_library.gnutls_handshake_set_private_extensions)

680

handshake_set_private_extensions.argtypes = [session_t,

681

ctypes.c_int]

682

handshake_set_private_extensions.restype = None

683

684

credentials_set = _library.gnutls_credentials_set

685

credentials_set.argtypes = [session_t, credentials_type_t,

686

ctypes.c_void_p]

687

credentials_set.restype = _error_code

688

689

strerror = _library.gnutls_strerror

690

strerror.argtypes = [ctypes.c_int]

691

strerror.restype = ctypes.c_char_p

692

693

certificate_type_get = _library.gnutls_certificate_type_get

694

certificate_type_get.argtypes = [session_t]

695

certificate_type_get.restype = _error_code

696

697

certificate_get_peers = _library.gnutls_certificate_get_peers

698

certificate_get_peers.argtypes = [session_t,

699

ctypes.POINTER(ctypes.c_uint)]

700

certificate_get_peers.restype = ctypes.POINTER(datum_t)

701

702

global_set_log_level = _library.gnutls_global_set_log_level

703

global_set_log_level.argtypes = [ctypes.c_int]

704

global_set_log_level.restype = None

705

706

global_set_log_function = _library.gnutls_global_set_log_function

707

global_set_log_function.argtypes = [log_func]

708

global_set_log_function.restype = None

709

710

deinit = _library.gnutls_deinit

711

deinit.argtypes = [session_t]

712

deinit.restype = None

713

714

handshake = _library.gnutls_handshake

715

handshake.argtypes = [session_t]

716

handshake.restype = _error_code

717

handshake.errcheck = _retry_on_error

718

719

transport_set_ptr = _library.gnutls_transport_set_ptr

720

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

721

transport_set_ptr.restype = None

722

723

bye = _library.gnutls_bye

724

bye.argtypes = [session_t, close_request_t]

725

bye.restype = _error_code

726

bye.errcheck = _retry_on_error

727

728

check_version = _library.gnutls_check_version

729

check_version.argtypes = [ctypes.c_char_p]

730

check_version.restype = ctypes.c_char_p

731

732

_need_version = b"3.3.0"

733

if check_version(_need_version) is None:

734

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

735

.format(_need_version))

736

737

_tls_rawpk_version = b"3.6.6"

738

has_rawpk = bool(check_version(_tls_rawpk_version))

739

740

if has_rawpk:

741

# Types

742

class pubkey_st(ctypes.Structure):

743

_fields = []

744

pubkey_t = ctypes.POINTER(pubkey_st)

745

746

x509_crt_fmt_t = ctypes.c_int

747

748

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

749

pubkey_init = _library.gnutls_pubkey_init

750

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

751

pubkey_init.restype = _error_code

752

753

pubkey_import = _library.gnutls_pubkey_import

754

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

755

x509_crt_fmt_t]

756

pubkey_import.restype = _error_code

757

758

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

759

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

760

ctypes.POINTER(ctypes.c_ubyte),

761

ctypes.POINTER(ctypes.c_size_t)]

762

pubkey_get_key_id.restype = _error_code

763

764

pubkey_deinit = _library.gnutls_pubkey_deinit

765

pubkey_deinit.argtypes = [pubkey_t]

766

pubkey_deinit.restype = None

767

else:

768

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

769

770

openpgp_crt_init = _library.gnutls_openpgp_crt_init

771

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

772

openpgp_crt_init.restype = _error_code

773

774

openpgp_crt_import = _library.gnutls_openpgp_crt_import

775

openpgp_crt_import.argtypes = [openpgp_crt_t,

776

ctypes.POINTER(datum_t),

777

openpgp_crt_fmt_t]

778

openpgp_crt_import.restype = _error_code

779

780

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

781

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

782

ctypes.POINTER(ctypes.c_uint)]

783

openpgp_crt_verify_self.restype = _error_code

784

785

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

786

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

787

openpgp_crt_deinit.restype = None

788

789

openpgp_crt_get_fingerprint = (

790

_library.gnutls_openpgp_crt_get_fingerprint)

791

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

792

ctypes.c_void_p,

793

ctypes.POINTER(

794

ctypes.c_size_t)]

795

openpgp_crt_get_fingerprint.restype = _error_code

796

797

if check_version(b"3.6.4"):

798

certificate_type_get2 = _library.gnutls_certificate_type_get2

799

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

800

certificate_type_get2.restype = _error_code

801

802

# Remove non-public functions

803

del _error_code, _retry_on_error

804

805

806

def call_pipe(connection, # : multiprocessing.Connection

807

func, *args, **kwargs):

808

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

809

810

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

811

return value on the provided multiprocessing.Connection.

812

"""

813

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

814

connection.close()

395

def timedelta_to_milliseconds(td):

396

"Convert a datetime.timedelta() to milliseconds"

397

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

398

+ (td.seconds * 1000)

399

+ (td.microseconds // 1000))

815

400

816

401

817

402

class Client(object):

818

403

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

819

404

820

405

Attributes:

821

406

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

822

407

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

823

408

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

824

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

825

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

826

running.

827

checker_callback_tag: a GLib event source tag, or None

409

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

410

to see if the client lives.

411

'None' if no process is running.

412

checker_callback_tag: a gobject event source tag, or None

828

413

checker_command: string; External command which is run to check

829

414

if client lives. %() expansions are done at

830

415

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

831

416

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

832

checker_initiator_tag: a GLib event source tag, or None

417

checker_initiator_tag: a gobject event source tag, or None

833

418

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

834

419

client_structure: Object describing what attributes a client has

835

420

and is used for storing the client at exit

836

421

current_checker_command: string; current running checker_command

837

disable_initiator_tag: a GLib event source tag, or None

422

disable_initiator_tag: a gobject event source tag, or None

838

423

enabled: bool()

839

424

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

840

uniquely identify an OpenPGP client

841

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

842

a client using raw public keys

425

uniquely identify the client

843

426

host: string; available for use by the checker command

844

427

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

845

428

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

847

430

last_checker_status: integer between 0 and 255 reflecting exit

848

431

status of last checker. -1 reflects crashed

849

432

checker, -2 means no checker completed yet.

850

last_checker_signal: The signal which killed the last checker, if

851

last_checker_status is -1

852

433

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

853

434

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

854

435

D-Bus identifiers

859

440

runtime_expansions: Allowed attributes for runtime expansion.

860

441

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

861

442

disabled, or None

862

server_settings: The server_settings dict from main()

863

443

"""

864

444

865

445

runtime_expansions = ("approval_delay", "approval_duration",

866

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

446

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

867

447

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

868

448

"last_approval_request", "last_checked_ok",

869

449

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

870

client_defaults = {

871

"timeout": "PT5M",

872

"extended_timeout": "PT15M",

873

"interval": "PT2M",

874

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

875

"host": "",

876

"approval_delay": "PT0S",

877

"approval_duration": "PT1S",

878

"approved_by_default": "True",

879

"enabled": "True",

880

}

881

450

client_defaults = { "timeout": "PT5M",

451

"extended_timeout": "PT15M",

452

"interval": "PT2M",

453

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

454

"host": "",

455

"approval_delay": "PT0S",

456

"approval_duration": "PT1S",

457

"approved_by_default": "True",

458

"enabled": "True",

459

}

460

461

def timeout_milliseconds(self):

462

"Return the 'timeout' attribute in milliseconds"

463

return timedelta_to_milliseconds(self.timeout)

464

465

def extended_timeout_milliseconds(self):

466

"Return the 'extended_timeout' attribute in milliseconds"

467

return timedelta_to_milliseconds(self.extended_timeout)

468

469

def interval_milliseconds(self):

470

"Return the 'interval' attribute in milliseconds"

471

return timedelta_to_milliseconds(self.interval)

472

473

def approval_delay_milliseconds(self):

474

return timedelta_to_milliseconds(self.approval_delay)

475

882

476

@staticmethod

883

477

def config_parser(config):

884

478

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

891

485

for client_name in config.sections():

892

486

section = dict(config.items(client_name))

893

487

client = settings[client_name] = {}

894

488

895

489

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

896

490

# Reformat values from string types to Python types

897

491

client["approved_by_default"] = config.getboolean(

898

492

client_name, "approved_by_default")

899

493

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

900

494

"enabled")

901

902

# Uppercase and remove spaces from key_id and fingerprint

903

# for later comparison purposes with return value from the

904

# key_id() and fingerprint() functions

905

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

906

.replace(" ", ""))

495

907

496

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

908

497

.replace(" ", ""))

909

498

if "secret" in section:

910

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

911

.encode("utf-8"),

912

"base64")

499

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

913

500

elif "secfile" in section:

914

501

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

915

502

(section["secfile"])),

916

503

"rb") as secfile:

917

504

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

918

505

else:

919

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

506

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

920

507

.format(section))

921

508

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

922

509

client["extended_timeout"] = string_to_delta(

930

517

client["last_approval_request"] = None

931

518

client["last_checked_ok"] = None

932

519

client["last_checker_status"] = -2

933

520

934

521

return settings

935

936

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

522

523

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

937

524

self.name = name

938

if server_settings is None:

939

server_settings = {}

940

self.server_settings = server_settings

941

525

# adding all client settings

942

for setting, value in settings.items():

526

for setting, value in settings.iteritems():

943

527

setattr(self, setting, value)

944

528

945

529

if self.enabled:

946

530

if not hasattr(self, "last_enabled"):

947

531

self.last_enabled = datetime.datetime.utcnow()

951

535

else:

952

536

self.last_enabled = None

953

537

self.expires = None

954

538

955

539

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

956

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

540

# Uppercase and remove spaces from fingerprint for later

541

# comparison purposes with return value from the fingerprint()

542

# function

957

543

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

958

544

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

959

545

datetime.datetime.utcnow())

960

546

961

547

# attributes specific for this server instance

962

548

self.checker = None

963

549

self.checker_initiator_tag = None

966

552

self.current_checker_command = None

967

553

self.approved = None

968

554

self.approvals_pending = 0

969

self.changedstate = multiprocessing_manager.Condition(

970

multiprocessing_manager.Lock())

971

self.client_structure = [attr

972

for attr in self.__dict__.keys()

555

self.changedstate = (multiprocessing_manager

556

.Condition(multiprocessing_manager

557

.Lock()))

558

self.client_structure = [attr for attr in

559

self.__dict__.iterkeys()

973

560

if not attr.startswith("_")]

974

561

self.client_structure.append("client_structure")

975

976

for name, t in inspect.getmembers(

977

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

562

563

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

564

lambda obj:

565

isinstance(obj,

566

property)):

978

567

if not name.startswith("_"):

979

568

self.client_structure.append(name)

980

569

981

570

# Send notice to process children that client state has changed

982

571

def send_changedstate(self):

983

572

with self.changedstate:

984

573

self.changedstate.notify_all()

985

574

986

575

def enable(self):

987

576

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

988

577

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

993

582

self.last_enabled = datetime.datetime.utcnow()

994

583

self.init_checker()

995

584

self.send_changedstate()

996

585

997

586

def disable(self, quiet=True):

998

587

"""Disable this client."""

999

588

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

1001

590

if not quiet:

1002

591

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

1003

592

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

1004

GLib.source_remove(self.disable_initiator_tag)

593

gobject.source_remove(self.disable_initiator_tag)

1005

594

self.disable_initiator_tag = None

1006

595

self.expires = None

1007

596

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

1008

GLib.source_remove(self.checker_initiator_tag)

597

gobject.source_remove(self.checker_initiator_tag)

1009

598

self.checker_initiator_tag = None

1010

599

self.stop_checker()

1011

600

self.enabled = False

1012

601

if not quiet:

1013

602

self.send_changedstate()

1014

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

603

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

1015

604

return False

1016

605

1017

606

def __del__(self):

1018

607

self.disable()

1019

608

1020

609

def init_checker(self):

1021

610

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

1022

611

# and every interval from then on.

1023

612

if self.checker_initiator_tag is not None:

1024

GLib.source_remove(self.checker_initiator_tag)

1025

self.checker_initiator_tag = GLib.timeout_add(

1026

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

1027

self.start_checker)

613

gobject.source_remove(self.checker_initiator_tag)

614

self.checker_initiator_tag = (gobject.timeout_add

615

(self.interval_milliseconds(),

616

self.start_checker))

1028

617

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

1029

618

if self.disable_initiator_tag is not None:

1030

GLib.source_remove(self.disable_initiator_tag)

1031

self.disable_initiator_tag = GLib.timeout_add(

1032

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

619

gobject.source_remove(self.disable_initiator_tag)

620

self.disable_initiator_tag = (gobject.timeout_add

621

(self.timeout_milliseconds(),

622

self.disable))

1033

623

# Also start a new checker *right now*.

1034

624

self.start_checker()

1035

1036

def checker_callback(self, source, condition, connection,

1037

command):

625

626

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

1038

627

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

1039

# Read return code from connection (see call_pipe)

1040

returncode = connection.recv()

1041

connection.close()

1042

self.checker.join()

1043

628

self.checker_callback_tag = None

1044

629

self.checker = None

1045

1046

if returncode >= 0:

1047

self.last_checker_status = returncode

1048

self.last_checker_signal = None

630

if os.WIFEXITED(condition):

631

self.last_checker_status = os.WEXITSTATUS(condition)

1049

632

if self.last_checker_status == 0:

1050

633

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

1051

634

vars(self))

1052

635

self.checked_ok()

1053

636

else:

1054

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

637

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

638

vars(self))

1055

639

else:

1056

640

self.last_checker_status = -1

1057

self.last_checker_signal = -returncode

1058

641

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

1059

642

vars(self))

1060

return False

1061

643

1062

644

def checked_ok(self):

1063

645

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

1064

646

self.last_checked_ok = datetime.datetime.utcnow()

1065

647

self.last_checker_status = 0

1066

self.last_checker_signal = None

1067

648

self.bump_timeout()

1068

649

1069

650

def bump_timeout(self, timeout=None):

1070

651

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

1071

652

if timeout is None:

1072

653

timeout = self.timeout

1073

654

if self.disable_initiator_tag is not None:

1074

GLib.source_remove(self.disable_initiator_tag)

655

gobject.source_remove(self.disable_initiator_tag)

1075

656

self.disable_initiator_tag = None

1076

657

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

1077

self.disable_initiator_tag = GLib.timeout_add(

1078

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

658

self.disable_initiator_tag = (gobject.timeout_add

659

(timedelta_to_milliseconds

660

(timeout), self.disable))

1079

661

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

1080

662

1081

663

def need_approval(self):

1082

664

self.last_approval_request = datetime.datetime.utcnow()

1083

665

1084

666

def start_checker(self):

1085

667

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

1086

668

1087

669

If a checker already exists, leave it running and do

1088

670

nothing."""

1089

671

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

1094

676

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

1095

677

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

1096

678

# should be.

1097

1098

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

1099

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

1100

self.checker.join()

1101

self.checker = None

679

680

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

681

try:

682

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

683

except (AttributeError, OSError) as error:

684

if (isinstance(error, OSError)

685

and error.errno != errno.ECHILD):

686

raise error

687

else:

688

if pid:

689

logger.warning("Checker was a zombie")

690

gobject.source_remove(self.checker_callback_tag)

691

self.checker_callback(pid, status,

692

self.current_checker_command)

1102

693

# Start a new checker if needed

1103

694

if self.checker is None:

1104

695

# Escape attributes for the shell

1105

escaped_attrs = {

1106

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

1107

for attr in self.runtime_expansions}

696

escaped_attrs = dict(

697

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

698

for attr in

699

self.runtime_expansions)

1108

700

try:

1109

701

command = self.checker_command % escaped_attrs

1110

702

except TypeError as error:

1111

703

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

1112

self.checker_command,

704

self.checker_command, exc_info=error)

705

return True # Try again later

706

self.current_checker_command = command

707

try:

708

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

709

command, self.name)

710

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

711

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

712

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

713

# always replaced by /dev/null.)

714

self.checker = subprocess.Popen(command,

715

close_fds=True,

716

shell=True, cwd="/")

717

except OSError as error:

718

logger.error("Failed to start subprocess",

1113

719

exc_info=error)

1114

return True # Try again later

1115

self.current_checker_command = command

1116

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

1117

self.name)

1118

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

1119

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

1120

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

1121

# always replaced by /dev/null.)

1122

# The exception is when not debugging but nevertheless

1123

# running in the foreground; use the previously

1124

# created wnull.

1125

popen_args = {"close_fds": True,

1126

"shell": True,

1127

"cwd": "/"}

1128

if (not self.server_settings["debug"]

1129

and self.server_settings["foreground"]):

1130

popen_args.update({"stdout": wnull,

1131

"stderr": wnull})

1132

pipe = multiprocessing.Pipe(duplex=False)

1133

self.checker = multiprocessing.Process(

1134

target=call_pipe,

1135

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

1136

kwargs=popen_args)

1137

self.checker.start()

1138

self.checker_callback_tag = GLib.io_add_watch(

1139

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

1140

self.checker_callback, pipe[0], command)

1141

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

720

return True

721

self.checker_callback_tag = (gobject.child_watch_add

722

(self.checker.pid,

723

self.checker_callback,

724

data=command))

725

# The checker may have completed before the gobject

726

# watch was added. Check for this.

727

try:

728

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

729

except OSError as error:

730

if error.errno == errno.ECHILD:

731

# This should never happen

732

logger.error("Child process vanished",

733

exc_info=error)

734

return True

735

raise

736

if pid:

737

gobject.source_remove(self.checker_callback_tag)

738

self.checker_callback(pid, status, command)

739

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

1142

740

return True

1143

741

1144

742

def stop_checker(self):

1145

743

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

1146

744

if self.checker_callback_tag:

1147

GLib.source_remove(self.checker_callback_tag)

745

gobject.source_remove(self.checker_callback_tag)

1148

746

self.checker_callback_tag = None

1149

747

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

1150

748

return

1151

749

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

1152

self.checker.terminate()

750

try:

751

self.checker.terminate()

752

#time.sleep(0.5)

753

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

754

# self.checker.kill()

755

except OSError as error:

756

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

757

raise

1153

758

self.checker = None

1154

759

1155

760

1156

def dbus_service_property(dbus_interface,

1157

signature="v",

1158

access="readwrite",

1159

byte_arrays=False):

761

def dbus_service_property(dbus_interface, signature="v",

762

access="readwrite", byte_arrays=False):

1160

763

"""Decorators for marking methods of a DBusObjectWithProperties to

1161

764

become properties on the D-Bus.

1162

765

1163

766

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

1164

767

and with one argument by "Set".

1165

768

1166

769

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

1167

770

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

1168

771

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

1171

774

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

1172

775

if byte_arrays and signature != "ay":

1173

776

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

1174

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

1175

777

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

1176

778

def decorator(func):

1177

779

func._dbus_is_property = True

1178

780

func._dbus_interface = dbus_interface

1181

783

func._dbus_name = func.__name__

1182

784

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

1183

785

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

1184

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

786

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1185

787

return func

1186

1187

788

return decorator

1188

789

1189

790

1190

791

def dbus_interface_annotations(dbus_interface):

1191

792

"""Decorator for marking functions returning interface annotations

1192

793

1193

794

Usage:

1194

795

1195

796

@dbus_interface_annotations("org.example.Interface")

1196

797

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

1197

798

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

1198

799

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

1199

800

"false"}

1200

801

"""

1201

1202

802

def decorator(func):

1203

803

func._dbus_is_interface = True

1204

804

func._dbus_interface = dbus_interface

1205

805

func._dbus_name = dbus_interface

1206

806

return func

1207

1208

807

return decorator

1209

808

1210

809

1211

810

def dbus_annotations(annotations):

1212

811

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

1213

812

Usage:

1214

1215

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

1216

"org.freedesktop.DBus.Property."

1217

"EmitsChangedSignal": "false"})

813

1218

814

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

1219

815

access="r")

816

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

817

"org.freedesktop.DBus.Property."

818

"EmitsChangedSignal": "false"})

1220

819

def Property_dbus_property(self):

1221

820

return dbus.Boolean(False)

1222

1223

See also the DBusObjectWithAnnotations class.

1224

821

"""

1225

1226

822

def decorator(func):

1227

823

func._dbus_annotations = annotations

1228

824

return func

1229

1230

825

return decorator

1231

826

1232

827

1233

828

class DBusPropertyException(dbus.exceptions.DBusException):

1234

829

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

1235

830

"""

1236

pass

831

def __unicode__(self):

832

return unicode(str(self))

1237

833

1238

834

1239

835

class DBusPropertyAccessException(DBusPropertyException):

1248

844

pass

1249

845

1250

846

1251

class DBusObjectWithAnnotations(dbus.service.Object):

1252

"""A D-Bus object with annotations.

1253

1254

Classes inheriting from this can use the dbus_annotations

1255

decorator to add annotations to methods or signals.

847

class DBusObjectWithProperties(dbus.service.Object):

848

"""A D-Bus object with properties.

849

850

Classes inheriting from this can use the dbus_service_property

851

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

852

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

1256

853

"""

1257

854

1258

855

@staticmethod

1259

856

def _is_dbus_thing(thing):

1260

857

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

1261

858

1262

859

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

1263

860

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

1264

861

"""

1265

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

862

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

1266

863

False)

1267

864

1268

865

def _get_all_dbus_things(self, thing):

1269

866

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

1270

867

"""

1271

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

868

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

869

name),

1272

870

athing.__get__(self))

1273

871

for cls in self.__class__.__mro__

1274

872

for name, athing in

1275

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

1276

1277

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1278

out_signature="s",

1279

path_keyword='object_path',

1280

connection_keyword='connection')

1281

def Introspect(self, object_path, connection):

1282

"""Overloading of standard D-Bus method.

1283

1284

Inserts annotation tags on methods and signals.

1285

"""

1286

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

1287

connection)

1288

try:

1289

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

1290

1291

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

1292

# Add annotation tags

1293

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

1294

for tag in if_tag.getElementsByTagName(typ):

1295

annots = dict()

1296

for name, prop in (self.

1297

_get_all_dbus_things(typ)):

1298

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

1299

and prop._dbus_interface

1300

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

1301

annots.update(getattr(

1302

prop, "_dbus_annotations", {}))

1303

for name, value in annots.items():

1304

ann_tag = document.createElement(

1305

"annotation")

1306

ann_tag.setAttribute("name", name)

1307

ann_tag.setAttribute("value", value)

1308

tag.appendChild(ann_tag)

1309

# Add interface annotation tags

1310

for annotation, value in dict(

1311

itertools.chain.from_iterable(

1312

annotations().items()

1313

for name, annotations

1314

in self._get_all_dbus_things("interface")

1315

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

1316

)).items():

1317

ann_tag = document.createElement("annotation")

1318

ann_tag.setAttribute("name", annotation)

1319

ann_tag.setAttribute("value", value)

1320

if_tag.appendChild(ann_tag)

1321

# Fix argument name for the Introspect method itself

1322

if (if_tag.getAttribute("name")

1323

== dbus.INTROSPECTABLE_IFACE):

1324

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

1325

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

1326

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

1327

if (arg.getAttribute("direction")

1328

== "out"):

1329

arg.setAttribute("name",

1330

"xml_data")

1331

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

1332

document.unlink()

1333

except (AttributeError, xml.dom.DOMException,

1334

xml.parsers.expat.ExpatError) as error:

1335

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

1336

exc_info=error)

1337

return xmlstring

1338

1339

1340

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1341

"""A D-Bus object with properties.

1342

1343

Classes inheriting from this can use the dbus_service_property

1344

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

1345

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

1346

"""

1347

873

inspect.getmembers(cls,

874

self._is_dbus_thing(thing)))

875

1348

876

def _get_dbus_property(self, interface_name, property_name):

1349

877

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

1350

878

property with the specified name and interface.

1351

879

"""

1352

for cls in self.__class__.__mro__:

1353

for name, value in inspect.getmembers(

1354

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

880

for cls in self.__class__.__mro__:

881

for name, value in (inspect.getmembers

882

(cls,

883

self._is_dbus_thing("property"))):

1355

884

if (value._dbus_name == property_name

1356

885

and value._dbus_interface == interface_name):

1357

886

return value.__get__(self)

1358

887

1359

888

# No such property

1360

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

1361

self.dbus_object_path, interface_name, property_name))

1362

1363

@classmethod

1364

def _get_all_interface_names(cls):

1365

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

1366

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

1367

"_dbus_interface", None)

1368

for x in (inspect.getmro(cls))

1369

for attr in dir(x))

1370

if name is not None)

1371

1372

@dbus.service.method(dbus.PROPERTIES_IFACE,

1373

in_signature="ss",

889

raise DBusPropertyNotFound(self.dbus_object_path + ":"

890

+ interface_name + "."

891

+ property_name)

892

893

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

1374

894

out_signature="v")

1375

895

def Get(self, interface_name, property_name):

1376

896

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

1382

902

if not hasattr(value, "variant_level"):

1383

903

return value

1384

904

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

1385

905

1386

906

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

1387

907

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

1388

908

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

1394

914

# The byte_arrays option is not supported yet on

1395

915

# signatures other than "ay".

1396

916

if prop._dbus_signature != "ay":

1397

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

1398

"'ay' signature {!r}"

1399

.format(prop._dbus_signature))

917

raise ValueError

1400

918

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

1401

919

for byte in value))

1402

920

prop(value)

1403

1404

@dbus.service.method(dbus.PROPERTIES_IFACE,

1405

in_signature="s",

921

922

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

1406

923

out_signature="a{sv}")

1407

924

def GetAll(self, interface_name):

1408

925

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

1409

926

standard.

1410

927

1411

928

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

1412

929

"""

1413

930

properties = {}

1423

940

if not hasattr(value, "variant_level"):

1424

941

properties[name] = value

1425

942

continue

1426

properties[name] = type(value)(

1427

value, variant_level=value.variant_level + 1)

943

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

944

value.variant_level+1)

1428

945

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

1429

1430

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

1431

def PropertiesChanged(self, interface_name, changed_properties,

1432

invalidated_properties):

1433

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

1434

standard.

1435

"""

1436

pass

1437

946

1438

947

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1439

948

out_signature="s",

1440

949

path_keyword='object_path',

1441

950

connection_keyword='connection')

1442

951

def Introspect(self, object_path, connection):

1443

952

"""Overloading of standard D-Bus method.

1444

953

1445

954

Inserts property tags and interface annotation tags.

1446

955

"""

1447

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1448

object_path,

1449

connection)

956

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

957

connection)

1450

958

try:

1451

959

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

1452

1453

960

def make_tag(document, name, prop):

1454

961

e = document.createElement("property")

1455

962

e.setAttribute("name", name)

1456

963

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

1457

964

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

1458

965

return e

1459

1460

966

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

1461

967

# Add property tags

1462

968

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

1465

971

if prop._dbus_interface

1466

972

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

1467

973

if_tag.appendChild(tag)

1468

# Add annotation tags for properties

1469

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

1470

annots = dict()

1471

for name, prop in self._get_all_dbus_things(

1472

"property"):

1473

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

1474

and prop._dbus_interface

1475

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

1476

annots.update(getattr(

1477

prop, "_dbus_annotations", {}))

1478

for name, value in annots.items():

1479

ann_tag = document.createElement(

1480

"annotation")

1481

ann_tag.setAttribute("name", name)

1482

ann_tag.setAttribute("value", value)

1483

tag.appendChild(ann_tag)

974

# Add annotation tags

975

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

976

for tag in if_tag.getElementsByTagName(typ):

977

annots = dict()

978

for name, prop in (self.

979

_get_all_dbus_things(typ)):

980

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

981

and prop._dbus_interface

982

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

983

annots.update(getattr

984

(prop,

985

"_dbus_annotations",

986

{}))

987

for name, value in annots.iteritems():

988

ann_tag = document.createElement(

989

"annotation")

990

ann_tag.setAttribute("name", name)

991

ann_tag.setAttribute("value", value)

992

tag.appendChild(ann_tag)

993

# Add interface annotation tags

994

for annotation, value in dict(

995

itertools.chain.from_iterable(

996

annotations().iteritems()

997

for name, annotations in

998

self._get_all_dbus_things("interface")

999

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

1000

)).iteritems():

1001

ann_tag = document.createElement("annotation")

1002

ann_tag.setAttribute("name", annotation)

1003

ann_tag.setAttribute("value", value)

1004

if_tag.appendChild(ann_tag)

1484

1005

# Add the names to the return values for the

1485

1006

# "org.freedesktop.DBus.Properties" methods

1486

1007

if (if_tag.getAttribute("name")

1505

1026

return xmlstring

1506

1027

1507

1028

1508

try:

1509

dbus.OBJECT_MANAGER_IFACE

1510

except AttributeError:

1511

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

1512

1513

1514

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1515

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

1516

1517

Classes inheriting from this exposes the standard

1518

GetManagedObjects call and the InterfacesAdded and

1519

InterfacesRemoved signals on the standard

1520

"org.freedesktop.DBus.ObjectManager" interface.

1521

1522

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

1523

manually.

1524

"""

1525

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1526

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

1527

def GetManagedObjects(self):

1528

"""This function must be overridden"""

1529

raise NotImplementedError()

1530

1531

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1532

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

1533

def InterfacesAdded(self, object_path, interfaces_and_properties):

1534

pass

1535

1536

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

1537

def InterfacesRemoved(self, object_path, interfaces):

1538

pass

1539

1540

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1541

out_signature="s",

1542

path_keyword='object_path',

1543

connection_keyword='connection')

1544

def Introspect(self, object_path, connection):

1545

"""Overloading of standard D-Bus method.

1546

1547

Override return argument name of GetManagedObjects to be

1548

"objpath_interfaces_and_properties"

1549

"""

1550

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1551

object_path,

1552

connection)

1553

try:

1554

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

1555

1556

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

1557

# Fix argument name for the GetManagedObjects method

1558

if (if_tag.getAttribute("name")

1559

== dbus.OBJECT_MANAGER_IFACE):

1560

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

1561

if (cn.getAttribute("name")

1562

== "GetManagedObjects"):

1563

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

1564

if (arg.getAttribute("direction")

1565

== "out"):

1566

arg.setAttribute(

1567

"name",

1568

"objpath_interfaces"

1569

"_and_properties")

1570

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

1571

document.unlink()

1572

except (AttributeError, xml.dom.DOMException,

1573

xml.parsers.expat.ExpatError) as error:

1574

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

1575

exc_info=error)

1576

return xmlstring

1577

1578

1579

1029

def datetime_to_dbus(dt, variant_level=0):

1580

1030

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

1581

1031

if dt is None:

1582

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

1583

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

1032

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

1033

return dbus.String(dt.isoformat(),

1034

variant_level=variant_level)

1584

1035

1585

1036

1586

1037

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1588

1039

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

1589

1040

interface names according to the "alt_interface_names" mapping.

1590

1041

Usage:

1591

1042

1592

1043

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

1593

1044

"net.example.AlternateInterface"})

1594

1045

class SampleDBusObject(dbus.service.Object):

1595

1046

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

1596

1047

def SampleDBusMethod():

1597

1048

pass

1598

1049

1599

1050

The above "SampleDBusMethod" on "SampleDBusObject" will be

1600

1051

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

1601

1052

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

1602

1053

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

1603

1054

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

1604

1055

1605

1056

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

1606

1057

(from DBusObjectWithProperties) and interfaces (from the

1607

1058

dbus_interface_annotations decorator).

1608

1059

"""

1609

1610

1060

def wrapper(cls):

1611

1061

for orig_interface_name, alt_interface_name in (

1612

alt_interface_names.items()):

1062

alt_interface_names.iteritems()):

1613

1063

attr = {}

1614

1064

interface_names = set()

1615

1065

# Go though all attributes of the class

1617

1067

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

1618

1068

# with the wrong interface name

1619

1069

if (not hasattr(attribute, "_dbus_interface")

1620

or not attribute._dbus_interface.startswith(

1621

orig_interface_name)):

1070

or not attribute._dbus_interface

1071

.startswith(orig_interface_name)):

1622

1072

continue

1623

1073

# Create an alternate D-Bus interface name based on

1624

1074

# the current name

1625

alt_interface = attribute._dbus_interface.replace(

1626

orig_interface_name, alt_interface_name)

1075

alt_interface = (attribute._dbus_interface

1076

.replace(orig_interface_name,

1077

alt_interface_name))

1627

1078

interface_names.add(alt_interface)

1628

1079

# Is this a D-Bus signal?

1629

1080

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

1630

# Extract the original non-method undecorated

1631

# function by black magic

1632

if sys.version_info.major == 2:

1633

nonmethod_func = (dict(

1081

# Extract the original non-method function by

1082

# black magic

1083

nonmethod_func = (dict(

1634

1084

zip(attribute.func_code.co_freevars,

1635

attribute.__closure__))

1636

["func"].cell_contents)

1637

else:

1638

nonmethod_func = (dict(

1639

zip(attribute.__code__.co_freevars,

1640

attribute.__closure__))

1641

["func"].cell_contents)

1085

attribute.__closure__))["func"]

1086

.cell_contents)

1642

1087

# Create a new, but exactly alike, function

1643

1088

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

1644

1089

# with the alternate D-Bus interface name

1645

new_function = copy_function(nonmethod_func)

1646

new_function = (dbus.service.signal(

1647

alt_interface,

1648

attribute._dbus_signature)(new_function))

1090

new_function = (dbus.service.signal

1091

(alt_interface,

1092

attribute._dbus_signature)

1093

(types.FunctionType(

1094

nonmethod_func.func_code,

1095

nonmethod_func.func_globals,

1096

nonmethod_func.func_name,

1097

nonmethod_func.func_defaults,

1098

nonmethod_func.func_closure)))

1649

1099

# Copy annotations, if any

1650

1100

try:

1651

new_function._dbus_annotations = dict(

1652

attribute._dbus_annotations)

1101

new_function._dbus_annotations = (

1102

dict(attribute._dbus_annotations))

1653

1103

except AttributeError:

1654

1104

pass

1655

1656

1105

# Define a creator of a function to call both the

1657

1106

# original and alternate functions, so both the

1658

1107

# original and alternate signals gets sent when

1661

1110

"""This function is a scope container to pass

1662

1111

func1 and func2 to the "call_both" function

1663

1112

outside of its arguments"""

1664

1665

@functools.wraps(func2)

1666

1113

def call_both(*args, **kwargs):

1667

1114

"""This function will emit two D-Bus

1668

1115

signals by calling func1 and func2"""

1669

1116

func1(*args, **kwargs)

1670

1117

func2(*args, **kwargs)

1671

# Make wrapper function look like a D-Bus

1672

# signal

1673

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

1674

if name.startswith("_dbus_"):

1675

setattr(call_both, name, attr)

1676

1677

1118

return call_both

1678

1119

# Create the "call_both" function and add it to

1679

1120

# the class

1684

1125

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

1685

1126

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

1686

1127

# to the class.

1687

attr[attrname] = (

1688

dbus.service.method(

1689

alt_interface,

1690

attribute._dbus_in_signature,

1691

attribute._dbus_out_signature)

1692

(copy_function(attribute)))

1128

attr[attrname] = (dbus.service.method

1129

(alt_interface,

1130

attribute._dbus_in_signature,

1131

attribute._dbus_out_signature)

1132

(types.FunctionType

1133

(attribute.func_code,

1134

attribute.func_globals,

1135

attribute.func_name,

1136

attribute.func_defaults,

1137

attribute.func_closure)))

1693

1138

# Copy annotations, if any

1694

1139

try:

1695

attr[attrname]._dbus_annotations = dict(

1696

attribute._dbus_annotations)

1140

attr[attrname]._dbus_annotations = (

1141

dict(attribute._dbus_annotations))

1697

1142

except AttributeError:

1698

1143

pass

1699

1144

# Is this a D-Bus property?

1702

1147

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

1703

1148

# property with the alternate D-Bus interface

1704

1149

# name. Add it to the class.

1705

attr[attrname] = (dbus_service_property(

1706

alt_interface, attribute._dbus_signature,

1707

attribute._dbus_access,

1708

attribute._dbus_get_args_options

1709

["byte_arrays"])

1710

(copy_function(attribute)))

1150

attr[attrname] = (dbus_service_property

1151

(alt_interface,

1152

attribute._dbus_signature,

1153

attribute._dbus_access,

1154

attribute

1155

._dbus_get_args_options

1156

["byte_arrays"])

1157

(types.FunctionType

1158

(attribute.func_code,

1159

attribute.func_globals,

1160

attribute.func_name,

1161

attribute.func_defaults,

1162

attribute.func_closure)))

1711

1163

# Copy annotations, if any

1712

1164

try:

1713

attr[attrname]._dbus_annotations = dict(

1714

attribute._dbus_annotations)

1165

attr[attrname]._dbus_annotations = (

1166

dict(attribute._dbus_annotations))

1715

1167

except AttributeError:

1716

1168

pass

1717

1169

# Is this a D-Bus interface?

1720

1172

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

1721

1173

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

1722

1174

# to the class.

1723

attr[attrname] = (

1724

dbus_interface_annotations(alt_interface)

1725

(copy_function(attribute)))

1175

attr[attrname] = (dbus_interface_annotations

1176

(alt_interface)

1177

(types.FunctionType

1178

(attribute.func_code,

1179

attribute.func_globals,

1180

attribute.func_name,

1181

attribute.func_defaults,

1182

attribute.func_closure)))

1726

1183

if deprecate:

1727

1184

# Deprecate all alternate interfaces

1728

iname = "_AlternateDBusNames_interface_annotation{}"

1185

iname="_AlternateDBusNames_interface_annotation{0}"

1729

1186

for interface_name in interface_names:

1730

1731

1187

@dbus_interface_annotations(interface_name)

1732

1188

def func(self):

1733

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

1734

"true"}

1189

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

1190

"true" }

1735

1191

# Find an unused name

1736

1192

for aname in (iname.format(i)

1737

1193

for i in itertools.count()):

1741

1197

if interface_names:

1742

1198

# Replace the class with a new subclass of it with

1743

1199

# methods, signals, etc. as created above.

1744

if sys.version_info.major == 2:

1745

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

1746

(cls, ), attr)

1747

else:

1748

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

1749

(cls, ), attr)

1200

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

1201

(cls,), attr)

1750

1202

return cls

1751

1752

1203

return wrapper

1753

1204

1754

1205

1755

1206

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

1756

"se.bsnet.fukt.Mandos"})

1207

"se.bsnet.fukt.Mandos"})

1757

1208

class ClientDBus(Client, DBusObjectWithProperties):

1758

1209

"""A Client class using D-Bus

1759

1210

1760

1211

Attributes:

1761

1212

dbus_object_path: dbus.ObjectPath

1762

1213

bus: dbus.SystemBus()

1763

1214

"""

1764

1215

1765

1216

runtime_expansions = (Client.runtime_expansions

1766

+ ("dbus_object_path", ))

1767

1768

_interface = "se.recompile.Mandos.Client"

1769

1217

+ ("dbus_object_path",))

1218

1770

1219

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

1771

1772

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

1220

1221

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

1773

1222

self.bus = bus

1774

1223

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

1775

1224

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

1776

1225

# the D-Bus

1777

client_object_name = str(self.name).translate(

1226

client_object_name = unicode(self.name).translate(

1778

1227

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

1779

1228

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

1780

self.dbus_object_path = dbus.ObjectPath(

1781

"/clients/" + client_object_name)

1229

self.dbus_object_path = (dbus.ObjectPath

1230

("/clients/" + client_object_name))

1782

1231

DBusObjectWithProperties.__init__(self, self.bus,

1783

1232

self.dbus_object_path)

1784

1785

def notifychangeproperty(transform_func, dbus_name,

1786

type_func=lambda x: x,

1787

variant_level=1,

1788

invalidate_only=False,

1789

_interface=_interface):

1233

1234

def notifychangeproperty(transform_func,

1235

dbus_name, type_func=lambda x: x,

1236

variant_level=1):

1790

1237

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

1791

1238

its changes to DBus.

1792

1239

1793

1240

transform_fun: Function that takes a value and a variant_level

1794

1241

and transforms it to a D-Bus type.

1795

1242

dbus_name: D-Bus name of the variable

1797

1244

to the D-Bus. Default: no transform

1798

1245

variant_level: D-Bus variant level. Default: 1

1799

1246

"""

1800

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

1801

1247

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

1802

1248

def setter(self, value):

1803

1249

if hasattr(self, "dbus_object_path"):

1804

1250

if (not hasattr(self, attrname) or

1805

1251

type_func(getattr(self, attrname, None))

1806

1252

!= type_func(value)):

1807

if invalidate_only:

1808

self.PropertiesChanged(

1809

_interface, dbus.Dictionary(),

1810

dbus.Array((dbus_name, )))

1811

else:

1812

dbus_value = transform_func(

1813

type_func(value),

1814

variant_level=variant_level)

1815

self.PropertyChanged(dbus.String(dbus_name),

1816

dbus_value)

1817

self.PropertiesChanged(

1818

_interface,

1819

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

1820

dbus_value}),

1821

dbus.Array())

1253

dbus_value = transform_func(type_func(value),

1254

variant_level

1255

=variant_level)

1256

self.PropertyChanged(dbus.String(dbus_name),

1257

dbus_value)

1822

1258

setattr(self, attrname, value)

1823

1259

1824

1260

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

1825

1261

1826

1262

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1827

1263

approvals_pending = notifychangeproperty(dbus.Boolean,

1828

1264

"ApprovalPending",

1829

type_func=bool)

1265

type_func = bool)

1830

1266

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

1831

1267

last_enabled = notifychangeproperty(datetime_to_dbus,

1832

1268

"LastEnabled")

1833

checker = notifychangeproperty(

1834

dbus.Boolean, "CheckerRunning",

1835

type_func=lambda checker: checker is not None)

1269

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

1270

type_func = lambda checker:

1271

checker is not None)

1836

1272

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1837

1273

"LastCheckedOK")

1838

1274

last_checker_status = notifychangeproperty(dbus.Int16,

1841

1277

datetime_to_dbus, "LastApprovalRequest")

1842

1278

approved_by_default = notifychangeproperty(dbus.Boolean,

1843

1279

"ApprovedByDefault")

1844

approval_delay = notifychangeproperty(

1845

dbus.UInt64, "ApprovalDelay",

1846

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

1280

approval_delay = notifychangeproperty(dbus.UInt64,

1281

"ApprovalDelay",

1282

type_func =

1283

timedelta_to_milliseconds)

1847

1284

approval_duration = notifychangeproperty(

1848

1285

dbus.UInt64, "ApprovalDuration",

1849

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

1286

type_func = timedelta_to_milliseconds)

1850

1287

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

1851

timeout = notifychangeproperty(

1852

dbus.UInt64, "Timeout",

1853

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

1288

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

1289

type_func =

1290

timedelta_to_milliseconds)

1854

1291

extended_timeout = notifychangeproperty(

1855

1292

dbus.UInt64, "ExtendedTimeout",

1856

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

1857

interval = notifychangeproperty(

1858

dbus.UInt64, "Interval",

1859

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

1293

type_func = timedelta_to_milliseconds)

1294

interval = notifychangeproperty(dbus.UInt64,

1295

"Interval",

1296

type_func =

1297

timedelta_to_milliseconds)

1860

1298

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

1861

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

1862

invalidate_only=True)

1863

1299

1864

1300

del notifychangeproperty

1865

1301

1866

1302

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

1867

1303

try:

1868

1304

self.remove_from_connection()

1871

1307

if hasattr(DBusObjectWithProperties, "__del__"):

1872

1308

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

1873

1309

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

1874

1875

def checker_callback(self, source, condition,

1876

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

1877

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

1878

connection, command, *args,

1879

**kwargs)

1880

exitstatus = self.last_checker_status

1881

if exitstatus >= 0:

1310

1311

def checker_callback(self, pid, condition, command,

1312

*args, **kwargs):

1313

self.checker_callback_tag = None

1314

self.checker = None

1315

if os.WIFEXITED(condition):

1316

exitstatus = os.WEXITSTATUS(condition)

1882

1317

# Emit D-Bus signal

1883

1318

self.CheckerCompleted(dbus.Int16(exitstatus),

1884

# This is specific to GNU libC

1885

dbus.Int64(exitstatus << 8),

1319

dbus.Int64(condition),

1886

1320

dbus.String(command))

1887

1321

else:

1888

1322

# Emit D-Bus signal

1889

1323

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

1890

dbus.Int64(

1891

# This is specific to GNU libC

1892

(exitstatus << 8)

1893

| self.last_checker_signal),

1324

dbus.Int64(condition),

1894

1325

dbus.String(command))

1895

return ret

1896

1326

1327

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

1328

*args, **kwargs)

1329

1897

1330

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

1898

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

1331

old_checker = self.checker

1332

if self.checker is not None:

1333

old_checker_pid = self.checker.pid

1334

else:

1335

old_checker_pid = None

1899

1336

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

1900

1337

# Only if new checker process was started

1901

1338

if (self.checker is not None

1903

1340

# Emit D-Bus signal

1904

1341

self.CheckerStarted(self.current_checker_command)

1905

1342

return r

1906

1343

1907

1344

def _reset_approved(self):

1908

1345

self.approved = None

1909

1346

return False

1910

1347

1911

1348

def approve(self, value=True):

1912

1349

self.approved = value

1913

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

1914

* 1000), self._reset_approved)

1350

gobject.timeout_add(timedelta_to_milliseconds

1351

(self.approval_duration),

1352

self._reset_approved)

1915

1353

self.send_changedstate()

1916

1917

# D-Bus methods, signals & properties

1918

1919

# Interfaces

1920

1921

# Signals

1922

1354

1355

## D-Bus methods, signals & properties

1356

_interface = "se.recompile.Mandos.Client"

1357

1358

## Interfaces

1359

1360

@dbus_interface_annotations(_interface)

1361

def _foo(self):

1362

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

1363

"false"}

1364

1365

## Signals

1366

1923

1367

# CheckerCompleted - signal

1924

1368

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

1925

1369

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

1926

1370

"D-Bus signal"

1927

1371

pass

1928

1372

1929

1373

# CheckerStarted - signal

1930

1374

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

1931

1375

def CheckerStarted(self, command):

1932

1376

"D-Bus signal"

1933

1377

pass

1934

1378

1935

1379

# PropertyChanged - signal

1936

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

1937

1380

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

1938

1381

def PropertyChanged(self, property, value):

1939

1382

"D-Bus signal"

1940

1383

pass

1941

1384

1942

1385

# GotSecret - signal

1943

1386

@dbus.service.signal(_interface)

1944

1387

def GotSecret(self):

1947

1390

server to mandos-client

1948

1391

"""

1949

1392

pass

1950

1393

1951

1394

# Rejected - signal

1952

1395

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

1953

1396

def Rejected(self, reason):

1954

1397

"D-Bus signal"

1955

1398

pass

1956

1399

1957

1400

# NeedApproval - signal

1958

1401

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

1959

1402

def NeedApproval(self, timeout, default):

1960

1403

"D-Bus signal"

1961

1404

return self.need_approval()

1962

1963

# Methods

1964

1405

1406

## Methods

1407

1965

1408

# Approve - method

1966

1409

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

1967

1410

def Approve(self, value):

1968

1411

self.approve(value)

1969

1412

1970

1413

# CheckedOK - method

1971

1414

@dbus.service.method(_interface)

1972

1415

def CheckedOK(self):

1973

1416

self.checked_ok()

1974

1417

1975

1418

# Enable - method

1976

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

1977

1419

@dbus.service.method(_interface)

1978

1420

def Enable(self):

1979

1421

"D-Bus method"

1980

1422

self.enable()

1981

1423

1982

1424

# StartChecker - method

1983

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

1984

1425

@dbus.service.method(_interface)

1985

1426

def StartChecker(self):

1986

1427

"D-Bus method"

1987

1428

self.start_checker()

1988

1429

1989

1430

# Disable - method

1990

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

1991

1431

@dbus.service.method(_interface)

1992

1432

def Disable(self):

1993

1433

"D-Bus method"

1994

1434

self.disable()

1995

1435

1996

1436

# StopChecker - method

1997

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

1998

1437

@dbus.service.method(_interface)

1999

1438

def StopChecker(self):

2000

1439

self.stop_checker()

2001

2002

# Properties

2003

1440

1441

## Properties

1442

2004

1443

# ApprovalPending - property

2005

1444

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

2006

1445

def ApprovalPending_dbus_property(self):

2007

1446

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

2008

1447

2009

1448

# ApprovedByDefault - property

2010

@dbus_service_property(_interface,

2011

signature="b",

1449

@dbus_service_property(_interface, signature="b",

2012

1450

access="readwrite")

2013

1451

def ApprovedByDefault_dbus_property(self, value=None):

2014

1452

if value is None: # get

2015

1453

return dbus.Boolean(self.approved_by_default)

2016

1454

self.approved_by_default = bool(value)

2017

1455

2018

1456

# ApprovalDelay - property

2019

@dbus_service_property(_interface,

2020

signature="t",

1457

@dbus_service_property(_interface, signature="t",

2021

1458

access="readwrite")

2022

1459

def ApprovalDelay_dbus_property(self, value=None):

2023

1460

if value is None: # get

2024

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

2025

* 1000)

1461

return dbus.UInt64(self.approval_delay_milliseconds())

2026

1462

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

2027

1463

2028

1464

# ApprovalDuration - property

2029

@dbus_service_property(_interface,

2030

signature="t",

1465

@dbus_service_property(_interface, signature="t",

2031

1466

access="readwrite")

2032

1467

def ApprovalDuration_dbus_property(self, value=None):

2033

1468

if value is None: # get

2034

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

2035

* 1000)

1469

return dbus.UInt64(timedelta_to_milliseconds(

1470

self.approval_duration))

2036

1471

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

2037

1472

2038

1473

# Name - property

2039

@dbus_annotations(

2040

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

2041

1474

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

2042

1475

def Name_dbus_property(self):

2043

1476

return dbus.String(self.name)

2044

2045

# KeyID - property

2046

@dbus_annotations(

2047

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

2048

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

2049

def KeyID_dbus_property(self):

2050

return dbus.String(self.key_id)

2051

1477

2052

1478

# Fingerprint - property

2053

@dbus_annotations(

2054

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

2055

1479

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

2056

1480

def Fingerprint_dbus_property(self):

2057

1481

return dbus.String(self.fingerprint)

2058

1482

2059

1483

# Host - property

2060

@dbus_service_property(_interface,

2061

signature="s",

1484

@dbus_service_property(_interface, signature="s",

2062

1485

access="readwrite")

2063

1486

def Host_dbus_property(self, value=None):

2064

1487

if value is None: # get

2065

1488

return dbus.String(self.host)

2066

self.host = str(value)

2067

1489

self.host = unicode(value)

1490

2068

1491

# Created - property

2069

@dbus_annotations(

2070

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

2071

1492

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

2072

1493

def Created_dbus_property(self):

2073

1494

return datetime_to_dbus(self.created)

2074

1495

2075

1496

# LastEnabled - property

2076

1497

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

2077

1498

def LastEnabled_dbus_property(self):

2078

1499

return datetime_to_dbus(self.last_enabled)

2079

1500

2080

1501

# Enabled - property

2081

@dbus_service_property(_interface,

2082

signature="b",

1502

@dbus_service_property(_interface, signature="b",

2083

1503

access="readwrite")

2084

1504

def Enabled_dbus_property(self, value=None):

2085

1505

if value is None: # get

2088

1508

self.enable()

2089

1509

else:

2090

1510

self.disable()

2091

1511

2092

1512

# LastCheckedOK - property

2093

@dbus_service_property(_interface,

2094

signature="s",

1513

@dbus_service_property(_interface, signature="s",

2095

1514

access="readwrite")

2096

1515

def LastCheckedOK_dbus_property(self, value=None):

2097

1516

if value is not None:

2098

1517

self.checked_ok()

2099

1518

return

2100

1519

return datetime_to_dbus(self.last_checked_ok)

2101

1520

2102

1521

# LastCheckerStatus - property

2103

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

1522

@dbus_service_property(_interface, signature="n",

1523

access="read")

2104

1524

def LastCheckerStatus_dbus_property(self):

2105

1525

return dbus.Int16(self.last_checker_status)

2106

1526

2107

1527

# Expires - property

2108

1528

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

2109

1529

def Expires_dbus_property(self):

2110

1530

return datetime_to_dbus(self.expires)

2111

1531

2112

1532

# LastApprovalRequest - property

2113

1533

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

2114

1534

def LastApprovalRequest_dbus_property(self):

2115

1535

return datetime_to_dbus(self.last_approval_request)

2116

1536

2117

1537

# Timeout - property

2118

@dbus_service_property(_interface,

2119

signature="t",

1538

@dbus_service_property(_interface, signature="t",

2120

1539

access="readwrite")

2121

1540

def Timeout_dbus_property(self, value=None):

2122

1541

if value is None: # get

2123

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

1542

return dbus.UInt64(self.timeout_milliseconds())

2124

1543

old_timeout = self.timeout

2125

1544

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

2126

1545

# Reschedule disabling

2134

1553

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

2135

1554

is None):

2136

1555

return

2137

GLib.source_remove(self.disable_initiator_tag)

2138

self.disable_initiator_tag = GLib.timeout_add(

2139

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

2140

self.disable)

2141

1556

gobject.source_remove(self.disable_initiator_tag)

1557

self.disable_initiator_tag = (

1558

gobject.timeout_add(

1559

timedelta_to_milliseconds(self.expires - now),

1560

self.disable))

1561

2142

1562

# ExtendedTimeout - property

2143

@dbus_service_property(_interface,

2144

signature="t",

1563

@dbus_service_property(_interface, signature="t",

2145

1564

access="readwrite")

2146

1565

def ExtendedTimeout_dbus_property(self, value=None):

2147

1566

if value is None: # get

2148

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

2149

* 1000)

1567

return dbus.UInt64(self.extended_timeout_milliseconds())

2150

1568

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

2151

1569

2152

1570

# Interval - property

2153

@dbus_service_property(_interface,

2154

signature="t",

1571

@dbus_service_property(_interface, signature="t",

2155

1572

access="readwrite")

2156

1573

def Interval_dbus_property(self, value=None):

2157

1574

if value is None: # get

2158

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

1575

return dbus.UInt64(self.interval_milliseconds())

2159

1576

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

2160

1577

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

2161

1578

return

2162

1579

if self.enabled:

2163

1580

# Reschedule checker run

2164

GLib.source_remove(self.checker_initiator_tag)

2165

self.checker_initiator_tag = GLib.timeout_add(

2166

value, self.start_checker)

2167

self.start_checker() # Start one now, too

2168

1581

gobject.source_remove(self.checker_initiator_tag)

1582

self.checker_initiator_tag = (gobject.timeout_add

1583

(value, self.start_checker))

1584

self.start_checker() # Start one now, too

1585

2169

1586

# Checker - property

2170

@dbus_service_property(_interface,

2171

signature="s",

1587

@dbus_service_property(_interface, signature="s",

2172

1588

access="readwrite")

2173

1589

def Checker_dbus_property(self, value=None):

2174

1590

if value is None: # get

2175

1591

return dbus.String(self.checker_command)

2176

self.checker_command = str(value)

2177

1592

self.checker_command = unicode(value)

1593

2178

1594

# CheckerRunning - property

2179

@dbus_service_property(_interface,

2180

signature="b",

1595

@dbus_service_property(_interface, signature="b",

2181

1596

access="readwrite")

2182

1597

def CheckerRunning_dbus_property(self, value=None):

2183

1598

if value is None: # get

2186

1601

self.start_checker()

2187

1602

else:

2188

1603

self.stop_checker()

2189

1604

2190

1605

# ObjectPath - property

2191

@dbus_annotations(

2192

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

2193

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

2194

1606

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

2195

1607

def ObjectPath_dbus_property(self):

2196

return self.dbus_object_path # is already a dbus.ObjectPath

2197

1608

return self.dbus_object_path # is already a dbus.ObjectPath

1609

2198

1610

# Secret = property

2199

@dbus_annotations(

2200

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

2201

"invalidates"})

2202

@dbus_service_property(_interface,

2203

signature="ay",

2204

access="write",

2205

byte_arrays=True)

1611

@dbus_service_property(_interface, signature="ay",

1612

access="write", byte_arrays=True)

2206

1613

def Secret_dbus_property(self, value):

2207

self.secret = bytes(value)

2208

1614

self.secret = str(value)

1615

2209

1616

del _interface

2210

1617

2211

1618

2212

1619

class ProxyClient(object):

2213

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

1620

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

2214

1621

self._pipe = child_pipe

2215

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

1622

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

2216

1623

if not self._pipe.recv():

2217

raise KeyError(key_id or fpr)

2218

1624

raise KeyError()

1625

2219

1626

def __getattribute__(self, name):

2220

1627

if name == '_pipe':

2221

1628

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

2224

1631

if data[0] == 'data':

2225

1632

return data[1]

2226

1633

if data[0] == 'function':

2227

2228

1634

def func(*args, **kwargs):

2229

1635

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

2230

1636

return self._pipe.recv()[1]

2231

2232

1637

return func

2233

1638

2234

1639

def __setattr__(self, name, value):

2235

1640

if name == '_pipe':

2236

1641

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

2239

1644

2240

1645

class ClientHandler(socketserver.BaseRequestHandler, object):

2241

1646

"""A class to handle client connections.

2242

1647

2243

1648

Instantiated once for each connection to handle it.

2244

1649

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

2245

1650

2246

1651

def handle(self):

2247

1652

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

2248

1653

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

2249

str(self.client_address))

1654

unicode(self.client_address))

2250

1655

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

2251

1656

self.server.child_pipe.fileno())

2252

2253

session = gnutls.ClientSession(self.request)

2254

2255

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

2256

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

2257

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

2258

# "+DHE-DSS"))

1657

1658

session = (gnutls.connection

1659

.ClientSession(self.request,

1660

gnutls.connection

1661

.X509Credentials()))

1662

1663

# Note: gnutls.connection.X509Credentials is really a

1664

# generic GnuTLS certificate credentials object so long as

1665

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

1666

# here despite using OpenPGP certificates.

1667

1668

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

1669

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

1670

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

1671

# "+DHE-DSS"))

2259

1672

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

2260

1673

priority = self.server.gnutls_priority

2261

1674

if priority is None:

2262

1675

priority = "NORMAL"

2263

gnutls.priority_set_direct(session._c_object,

2264

priority.encode("utf-8"),

2265

None)

2266

1676

(gnutls.library.functions

1677

.gnutls_priority_set_direct(session._c_object,

1678

priority, None))

1679

2267

1680

# Start communication using the Mandos protocol

2268

1681

# Get protocol number

2269

1682

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

2270

1683

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

2271

1684

try:

2272

1685

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

2273

raise RuntimeError(line)

1686

raise RuntimeError

2274

1687

except (ValueError, IndexError, RuntimeError) as error:

2275

1688

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

2276

1689

return

2277

1690

2278

1691

# Start GnuTLS connection

2279

1692

try:

2280

1693

session.handshake()

2281

except gnutls.Error as error:

1694

except gnutls.errors.GNUTLSError as error:

2282

1695

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

2283

1696

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

2284

1697

# established. Just abandon the request.

2285

1698

return

2286

1699

logger.debug("Handshake succeeded")

2287

1700

2288

1701

approval_required = False

2289

1702

try:

2290

if gnutls.has_rawpk:

2291

fpr = b""

2292

try:

2293

key_id = self.key_id(

2294

self.peer_certificate(session))

2295

except (TypeError, gnutls.Error) as error:

2296

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

2297

return

2298

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

2299

2300

else:

2301

key_id = b""

2302

try:

2303

fpr = self.fingerprint(

2304

self.peer_certificate(session))

2305

except (TypeError, gnutls.Error) as error:

2306

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

2307

return

2308

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

2309

2310

try:

2311

client = ProxyClient(child_pipe, key_id, fpr,

1703

try:

1704

fpr = self.fingerprint(self.peer_certificate

1705

(session))

1706

except (TypeError,

1707

gnutls.errors.GNUTLSError) as error:

1708

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

1709

return

1710

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

1711

1712

try:

1713

client = ProxyClient(child_pipe, fpr,

2312

1714

self.client_address)

2313

1715

except KeyError:

2314

1716

return

2315

1717

2316

1718

if client.approval_delay:

2317

1719

delay = client.approval_delay

2318

1720

client.approvals_pending += 1

2319

1721

approval_required = True

2320

1722

2321

1723

while True:

2322

1724

if not client.enabled:

2323

1725

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

2324

client.name)

1726

client.name)

2325

1727

if self.server.use_dbus:

2326

1728

# Emit D-Bus signal

2327

1729

client.Rejected("Disabled")

2328

1730

return

2329

1731

2330

1732

if client.approved or not client.approval_delay:

2331

# We are approved or approval is disabled

1733

#We are approved or approval is disabled

2332

1734

break

2333

1735

elif client.approved is None:

2334

1736

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

2336

1738

if self.server.use_dbus:

2337

1739

# Emit D-Bus signal

2338

1740

client.NeedApproval(

2339

client.approval_delay.total_seconds()

2340

* 1000, client.approved_by_default)

1741

client.approval_delay_milliseconds(),

1742

client.approved_by_default)

2341

1743

else:

2342

1744

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

2343

1745

client.name)

2345

1747

# Emit D-Bus signal

2346

1748

client.Rejected("Denied")

2347

1749

return

2348

2349

# wait until timeout or approved

1750

1751

#wait until timeout or approved

2350

1752

time = datetime.datetime.now()

2351

1753

client.changedstate.acquire()

2352

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

1754

client.changedstate.wait(

1755

float(timedelta_to_milliseconds(delay)

1756

/ 1000))

2353

1757

client.changedstate.release()

2354

1758

time2 = datetime.datetime.now()

2355

1759

if (time2 - time) >= delay:

2365

1769

break

2366

1770

else:

2367

1771

delay -= time2 - time

2368

2369

try:

2370

session.send(client.secret)

2371

except gnutls.Error as error:

2372

logger.warning("gnutls send failed",

2373

exc_info=error)

2374

return

2375

1772

1773

sent_size = 0

1774

while sent_size < len(client.secret):

1775

try:

1776

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

1777

except gnutls.errors.GNUTLSError as error:

1778

logger.warning("gnutls send failed",

1779

exc_info=error)

1780

return

1781

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

1782

sent, len(client.secret)

1783

- (sent_size + sent))

1784

sent_size += sent

1785

2376

1786

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

2377

1787

# bump the timeout using extended_timeout

2378

1788

client.bump_timeout(client.extended_timeout)

2379

1789

if self.server.use_dbus:

2380

1790

# Emit D-Bus signal

2381

1791

client.GotSecret()

2382

1792

2383

1793

finally:

2384

1794

if approval_required:

2385

1795

client.approvals_pending -= 1

2386

1796

try:

2387

1797

session.bye()

2388

except gnutls.Error as error:

1798

except gnutls.errors.GNUTLSError as error:

2389

1799

logger.warning("GnuTLS bye failed",

2390

1800

exc_info=error)

2391

1801

2392

1802

@staticmethod

2393

1803

def peer_certificate(session):

2394

"Return the peer's certificate as a bytestring"

2395

try:

2396

cert_type = gnutls.certificate_type_get2(session._c_object,

2397

gnutls.CTYPE_PEERS)

2398

except AttributeError:

2399

cert_type = gnutls.certificate_type_get(session._c_object)

2400

if gnutls.has_rawpk:

2401

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2402

else:

2403

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2404

# If not a valid certificate type...

2405

if cert_type not in valid_cert_types:

2406

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

2407

valid_cert_types)

2408

# ...return invalid data

2409

return b""

1804

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

1805

# If not an OpenPGP certificate...

1806

if (gnutls.library.functions

1807

.gnutls_certificate_type_get(session._c_object)

1808

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1809

# ...do the normal thing

1810

return session.peer_certificate

2410

1811

list_size = ctypes.c_uint(1)

2411

cert_list = (gnutls.certificate_get_peers

1812

cert_list = (gnutls.library.functions

1813

.gnutls_certificate_get_peers

2412

1814

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

2413

1815

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

2414

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

1816

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

1817

" certificate")

2415

1818

if list_size.value == 0:

2416

1819

return None

2417

1820

cert = cert_list[0]

2418

1821

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

2419

2420

@staticmethod

2421

def key_id(certificate):

2422

"Convert a certificate bytestring to a hexdigit key ID"

2423

# New GnuTLS "datum" with the public key

2424

datum = gnutls.datum_t(

2425

ctypes.cast(ctypes.c_char_p(certificate),

2426

ctypes.POINTER(ctypes.c_ubyte)),

2427

ctypes.c_uint(len(certificate)))

2428

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

2429

# New empty GnuTLS certificate

2430

pubkey = gnutls.pubkey_t()

2431

gnutls.pubkey_init(ctypes.byref(pubkey))

2432

# Import the raw public key into the certificate

2433

gnutls.pubkey_import(pubkey,

2434

ctypes.byref(datum),

2435

gnutls.X509_FMT_DER)

2436

# New buffer for the key ID

2437

buf = ctypes.create_string_buffer(32)

2438

buf_len = ctypes.c_size_t(len(buf))

2439

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

2440

gnutls.pubkey_get_key_id(pubkey,

2441

gnutls.KEYID_USE_SHA256,

2442

ctypes.cast(ctypes.byref(buf),

2443

ctypes.POINTER(ctypes.c_ubyte)),

2444

ctypes.byref(buf_len))

2445

# Deinit the certificate

2446

gnutls.pubkey_deinit(pubkey)

2447

2448

# Convert the buffer to a Python bytestring

2449

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

2450

# Convert the bytestring to hexadecimal notation

2451

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

2452

return hex_key_id

2453

1822

2454

1823

@staticmethod

2455

1824

def fingerprint(openpgp):

2456

1825

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2457

1826

# New GnuTLS "datum" with the OpenPGP public key

2458

datum = gnutls.datum_t(

2459

ctypes.cast(ctypes.c_char_p(openpgp),

2460

ctypes.POINTER(ctypes.c_ubyte)),

2461

ctypes.c_uint(len(openpgp)))

1827

datum = (gnutls.library.types

1828

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

1829

ctypes.POINTER

1830

(ctypes.c_ubyte)),

1831

ctypes.c_uint(len(openpgp))))

2462

1832

# New empty GnuTLS certificate

2463

crt = gnutls.openpgp_crt_t()

2464

gnutls.openpgp_crt_init(ctypes.byref(crt))

1833

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1834

(gnutls.library.functions

1835

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2465

1836

# Import the OpenPGP public key into the certificate

2466

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

2467

gnutls.OPENPGP_FMT_RAW)

1837

(gnutls.library.functions

1838

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

1839

gnutls.library.constants

1840

.GNUTLS_OPENPGP_FMT_RAW))

2468

1841

# Verify the self signature in the key

2469

1842

crtverify = ctypes.c_uint()

2470

gnutls.openpgp_crt_verify_self(crt, 0,

2471

ctypes.byref(crtverify))

1843

(gnutls.library.functions

1844

.gnutls_openpgp_crt_verify_self(crt, 0,

1845

ctypes.byref(crtverify)))

2472

1846

if crtverify.value != 0:

2473

gnutls.openpgp_crt_deinit(crt)

2474

raise gnutls.CertificateSecurityError(code

2475

=crtverify.value)

1847

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1848

raise (gnutls.errors.CertificateSecurityError

1849

("Verify failed"))

2476

1850

# New buffer for the fingerprint

2477

1851

buf = ctypes.create_string_buffer(20)

2478

1852

buf_len = ctypes.c_size_t()

2479

1853

# Get the fingerprint from the certificate into the buffer

2480

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

2481

ctypes.byref(buf_len))

1854

(gnutls.library.functions

1855

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

1856

ctypes.byref(buf_len)))

2482

1857

# Deinit the certificate

2483

gnutls.openpgp_crt_deinit(crt)

1858

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2484

1859

# Convert the buffer to a Python bytestring

2485

1860

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

2486

1861

# Convert the bytestring to hexadecimal notation

2490

1865

2491

1866

class MultiprocessingMixIn(object):

2492

1867

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

2493

2494

1868

def sub_process_main(self, request, address):

2495

1869

try:

2496

1870

self.finish_request(request, address)

2497

1871

except Exception:

2498

1872

self.handle_error(request, address)

2499

1873

self.close_request(request)

2500

1874

2501

1875

def process_request(self, request, address):

2502

1876

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

2503

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

2504

args=(request, address))

1877

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

1878

args = (request, address))

2505

1879

proc.start()

2506

1880

return proc

2507

1881

2508

1882

2509

1883

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2510

1884

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

2511

2512

1885

def process_request(self, request, client_address):

2513

1886

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

2514

1887

2515

1888

This function creates a new pipe in self.pipe

2516

1889

"""

2517

1890

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2518

1891

2519

1892

proc = MultiprocessingMixIn.process_request(self, request,

2520

1893

client_address)

2521

1894

self.child_pipe.close()

2522

1895

self.add_pipe(parent_pipe, proc)

2523

1896

2524

1897

def add_pipe(self, parent_pipe, proc):

2525

1898

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

2526

raise NotImplementedError()

1899

raise NotImplementedError

2527

1900

2528

1901

2529

1902

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2530

1903

socketserver.TCPServer, object):

2531

1904

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

2532

1905

2533

1906

Attributes:

2534

1907

enabled: Boolean; whether this server is activated yet

2535

1908

interface: None or a network interface name (string)

2536

1909

use_ipv6: Boolean; to use IPv6 or not

2537

1910

"""

2538

2539

1911

def __init__(self, server_address, RequestHandlerClass,

2540

interface=None,

2541

use_ipv6=True,

2542

socketfd=None):

1912

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

2543

1913

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

2544

1914

creating a new one with socket.socket().

2545

1915

"""

2551

1921

self.socketfd = socketfd

2552

1922

# Save the original socket.socket() function

2553

1923

self.socket_socket = socket.socket

2554

2555

1924

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

2556

#

1925

#

2557

1926

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

2558

1927

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

2559

1928

# patching socket.socket.)

2560

#

1929

#

2561

1930

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

2562

1931

@functools.wraps(socket.socket)

2563

1932

def socket_wrapper(*args, **kwargs):

2575

1944

# socket_wrapper(), if socketfd was set.

2576

1945

socketserver.TCPServer.__init__(self, server_address,

2577

1946

RequestHandlerClass)

2578

1947

2579

1948

def server_bind(self):

2580

1949

"""This overrides the normal server_bind() function

2581

1950

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

2582

1951

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

2583

global SO_BINDTODEVICE

2584

1952

if self.interface is not None:

2585

1953

if SO_BINDTODEVICE is None:

2586

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

2587

# common enough.

2588

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

2589

SO_BINDTODEVICE = 25

2590

try:

2591

self.socket.setsockopt(

2592

socket.SOL_SOCKET, SO_BINDTODEVICE,

2593

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

2594

except socket.error as error:

2595

if error.errno == errno.EPERM:

2596

logger.error("No permission to bind to"

2597

" interface %s", self.interface)

2598

elif error.errno == errno.ENOPROTOOPT:

2599

logger.error("SO_BINDTODEVICE not available;"

2600

" cannot bind to interface %s",

2601

self.interface)

2602

elif error.errno == errno.ENODEV:

2603

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

2604

" cannot bind", self.interface)

2605

else:

2606

raise

1954

logger.error("SO_BINDTODEVICE does not exist;"

1955

" cannot bind to interface %s",

1956

self.interface)

1957

else:

1958

try:

1959

self.socket.setsockopt(socket.SOL_SOCKET,

1960

SO_BINDTODEVICE,

1961

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

1962

except socket.error as error:

1963

if error.errno == errno.EPERM:

1964

logger.error("No permission to bind to"

1965

" interface %s", self.interface)

1966

elif error.errno == errno.ENOPROTOOPT:

1967

logger.error("SO_BINDTODEVICE not available;"

1968

" cannot bind to interface %s",

1969

self.interface)

1970

elif error.errno == errno.ENODEV:

1971

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

1972

" cannot bind", self.interface)

1973

else:

1974

raise

2607

1975

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

2608

1976

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

2609

if self.server_address[1]:

2610

self.allow_reuse_address = True

2611

1977

if not self.server_address[0]:

2612

1978

if self.address_family == socket.AF_INET6:

2613

any_address = "::" # in6addr_any

1979

any_address = "::" # in6addr_any

2614

1980

else:

2615

any_address = "0.0.0.0" # INADDR_ANY

1981

any_address = socket.INADDR_ANY

2616

1982

self.server_address = (any_address,

2617

1983

self.server_address[1])

2618

1984

elif not self.server_address[1]:

2619

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

1985

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

1986

0)

2620

1987

# if self.interface:

2621

1988

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

2622

1989

# 0, # port

2628

1995

2629

1996

class MandosServer(IPv6_TCPServer):

2630

1997

"""Mandos server.

2631

1998

2632

1999

Attributes:

2633

2000

clients: set of Client objects

2634

2001

gnutls_priority GnuTLS priority string

2635

2002

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

2636

2637

Assumes a GLib.MainLoop event loop.

2003

2004

Assumes a gobject.MainLoop event loop.

2638

2005

"""

2639

2640

2006

def __init__(self, server_address, RequestHandlerClass,

2641

interface=None,

2642

use_ipv6=True,

2643

clients=None,

2644

gnutls_priority=None,

2645

use_dbus=True,

2646

socketfd=None):

2007

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

2008

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

2647

2009

self.enabled = False

2648

2010

self.clients = clients

2649

2011

if self.clients is None:

2652

2014

self.gnutls_priority = gnutls_priority

2653

2015

IPv6_TCPServer.__init__(self, server_address,

2654

2016

RequestHandlerClass,

2655

interface=interface,

2656

use_ipv6=use_ipv6,

2657

socketfd=socketfd)

2658

2017

interface = interface,

2018

use_ipv6 = use_ipv6,

2019

socketfd = socketfd)

2659

2020

def server_activate(self):

2660

2021

if self.enabled:

2661

2022

return socketserver.TCPServer.server_activate(self)

2662

2023

2663

2024

def enable(self):

2664

2025

self.enabled = True

2665

2026

2666

2027

def add_pipe(self, parent_pipe, proc):

2667

2028

# Call "handle_ipc" for both data and EOF events

2668

GLib.io_add_watch(

2669

parent_pipe.fileno(),

2670

GLib.IO_IN | GLib.IO_HUP,

2671

functools.partial(self.handle_ipc,

2672

parent_pipe=parent_pipe,

2673

proc=proc))

2674

2675

def handle_ipc(self, source, condition,

2676

parent_pipe=None,

2677

proc=None,

2678

client_object=None):

2029

gobject.io_add_watch(parent_pipe.fileno(),

2030

gobject.IO_IN | gobject.IO_HUP,

2031

functools.partial(self.handle_ipc,

2032

parent_pipe =

2033

parent_pipe,

2034

proc = proc))

2035

2036

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

2037

proc = None, client_object=None):

2679

2038

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

2680

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

2039

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

2681

2040

# Wait for other process to exit

2682

2041

proc.join()

2683

2042

return False

2684

2043

2685

2044

# Read a request from the child

2686

2045

request = parent_pipe.recv()

2687

2046

command = request[0]

2688

2047

2689

2048

if command == 'init':

2690

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

2691

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

2692

address = request[3]

2693

2694

for c in self.clients.values():

2695

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2696

continue

2697

if key_id and c.key_id == key_id:

2698

client = c

2699

break

2700

if fpr and c.fingerprint == fpr:

2049

fpr = request[1]

2050

address = request[2]

2051

2052

for c in self.clients.itervalues():

2053

if c.fingerprint == fpr:

2701

2054

client = c

2702

2055

break

2703

2056

else:

2704

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

2705

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

2057

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

2058

"dress: %s", fpr, address)

2706

2059

if self.use_dbus:

2707

2060

# Emit D-Bus signal

2708

mandos_dbus_service.ClientNotFound(key_id or fpr,

2061

mandos_dbus_service.ClientNotFound(fpr,

2709

2062

address[0])

2710

2063

parent_pipe.send(False)

2711

2064

return False

2712

2713

GLib.io_add_watch(

2714

parent_pipe.fileno(),

2715

GLib.IO_IN | GLib.IO_HUP,

2716

functools.partial(self.handle_ipc,

2717

parent_pipe=parent_pipe,

2718

proc=proc,

2719

client_object=client))

2065

2066

gobject.io_add_watch(parent_pipe.fileno(),

2067

gobject.IO_IN | gobject.IO_HUP,

2068

functools.partial(self.handle_ipc,

2069

parent_pipe =

2070

parent_pipe,

2071

proc = proc,

2072

client_object =

2073

client))

2720

2074

parent_pipe.send(True)

2721

2075

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

2722

2076

# same fileno

2725

2079

funcname = request[1]

2726

2080

args = request[2]

2727

2081

kwargs = request[3]

2728

2082

2729

2083

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

2730

2084

funcname)(*args,

2731

**kwargs)))

2732

2085

**kwargs)))

2086

2733

2087

if command == 'getattr':

2734

2088

attrname = request[1]

2735

if isinstance(client_object.__getattribute__(attrname),

2736

collections.Callable):

2737

parent_pipe.send(('function', ))

2089

if callable(client_object.__getattribute__(attrname)):

2090

parent_pipe.send(('function',))

2738

2091

else:

2739

parent_pipe.send((

2740

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

2741

2092

parent_pipe.send(('data', client_object

2093

.__getattribute__(attrname)))

2094

2742

2095

if command == 'setattr':

2743

2096

attrname = request[1]

2744

2097

value = request[2]

2745

2098

setattr(client_object, attrname, value)

2746

2099

2747

2100

return True

2748

2101

2749

2102

2750

2103

def rfc3339_duration_to_delta(duration):

2751

2104

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

2752

2105

2753

2106

>>> rfc3339_duration_to_delta("P7D")

2754

2107

datetime.timedelta(7)

2755

2108

>>> rfc3339_duration_to_delta("PT60S")

2765

2118

>>> rfc3339_duration_to_delta("P1DT3M20S")

2766

2119

datetime.timedelta(1, 200)

2767

2120

"""

2768

2121

2769

2122

# Parsing an RFC 3339 duration with regular expressions is not

2770

2123

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

2771

2124

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

2772

2125

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

2773

2126

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

2774

2127

# avoid excessive use of external libraries.

2775

2128

2776

2129

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

2777

Token = collections.namedtuple("Token", (

2778

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

2779

# a "group" containing digits

2780

"value", # datetime.timedelta or None

2781

"followers")) # Tokens valid after this token

2130

Token = collections.namedtuple("Token",

2131

("regexp", # To match token; if

2132

# "value" is not None,

2133

# must have a "group"

2134

# containing digits

2135

"value", # datetime.timedelta or

2136

# None

2137

"followers")) # Tokens valid after

2138

# this token

2782

2139

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

2783

2140

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

2784

2141

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

2785

2142

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

2786

2143

datetime.timedelta(seconds=1),

2787

frozenset((token_end, )))

2144

frozenset((token_end,)))

2788

2145

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

2789

2146

datetime.timedelta(minutes=1),

2790

2147

frozenset((token_second, token_end)))

2806

2163

frozenset((token_month, token_end)))

2807

2164

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

2808

2165

datetime.timedelta(weeks=1),

2809

frozenset((token_end, )))

2166

frozenset((token_end,)))

2810

2167

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

2811

2168

frozenset((token_year, token_month,

2812

2169

token_day, token_time,

2813

token_week)))

2814

# Define starting values:

2815

# Value so far

2816

value = datetime.timedelta()

2170

token_week))),

2171

# Define starting values

2172

value = datetime.timedelta() # Value so far

2817

2173

found_token = None

2818

# Following valid tokens

2819

followers = frozenset((token_duration, ))

2820

# String left to parse

2821

s = duration

2174

followers = frozenset(token_duration,) # Following valid tokens

2175

s = duration # String left to parse

2822

2176

# Loop until end token is found

2823

2177

while found_token is not token_end:

2824

2178

# Search for any currently valid tokens

2840

2194

break

2841

2195

else:

2842

2196

# No currently valid tokens were found

2843

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

2844

.format(duration))

2197

raise ValueError("Invalid RFC 3339 duration")

2845

2198

# End token found

2846

2199

return value

2847

2200

2848

2201

2849

2202

def string_to_delta(interval):

2850

2203

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

2851

2204

2852

2205

>>> string_to_delta('7d')

2853

2206

datetime.timedelta(7)

2854

2207

>>> string_to_delta('60s')

2862

2215

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

2863

2216

datetime.timedelta(0, 330)

2864

2217

"""

2865

2218

2866

2219

try:

2867

2220

return rfc3339_duration_to_delta(interval)

2868

2221

except ValueError:

2869

2222

pass

2870

2223

2871

2224

timevalue = datetime.timedelta(0)

2872

2225

for s in interval.split():

2873

2226

try:

2874

suffix = s[-1]

2227

suffix = unicode(s[-1])

2875

2228

value = int(s[:-1])

2876

2229

if suffix == "d":

2877

2230

delta = datetime.timedelta(value)

2884

2237

elif suffix == "w":

2885

2238

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

2886

2239

else:

2887

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

2888

except IndexError as e:

2240

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

2241

.format(suffix))

2242

except (ValueError, IndexError) as e:

2889

2243

raise ValueError(*(e.args))

2890

2244

timevalue += delta

2891

2245

return timevalue

2892

2246

2893

2247

2894

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

2248

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

2895

2249

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

2896

2250

2897

2251

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

2898

2252

if os.fork():

2899

2253

sys.exit()

2907

2261

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

2908

2262

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

2909

2263

raise OSError(errno.ENODEV,

2910

"{} not a character device"

2264

"{0} not a character device"

2911

2265

.format(os.devnull))

2912

2266

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

2913

2267

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

2917

2271

2918

2272

2919

2273

def main():

2920

2274

2921

2275

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

2922

2276

# Parsing of options, both command line and config file

2923

2277

2924

2278

parser = argparse.ArgumentParser()

2925

2279

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

2926

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

2280

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

2927

2281

help="show version number and exit")

2928

2282

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

2929

2283

help="Bind to interface IF")

2935

2289

help="Run self-test")

2936

2290

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

2937

2291

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

2938

" to terminal", default=None)

2292

" to terminal")

2939

2293

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

2940

2294

help="Debug level for stdout output")

2941

2295

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

2948

2302

" files")

2949

2303

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

2950

2304

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

2951

" system bus interface", default=None)

2305

" system bus interface")

2952

2306

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

2953

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

2954

default=None)

2307

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

2955

2308

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

2956

2309

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

2957

" state", default=None)

2310

" state")

2958

2311

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

2959

2312

help="Specify a file descriptor to a network"

2960

2313

" socket to use instead of creating one")

2961

2314

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

2962

2315

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

2963

2316

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

2964

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

2965

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

2966

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

2967

default=None)

2968

2317

help="Run in foreground")

2318

2969

2319

options = parser.parse_args()

2970

2320

2971

2321

if options.check:

2972

2322

import doctest

2973

fail_count, test_count = doctest.testmod()

2974

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

2975

2323

doctest.testmod()

2324

sys.exit()

2325

2976

2326

# Default values for config file for server-global settings

2977

if gnutls.has_rawpk:

2978

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

2979

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

2980

else:

2981

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

2982

":+SIGN-DSA-SHA256")

2983

server_defaults = {"interface": "",

2984

"address": "",

2985

"port": "",

2986

"debug": "False",

2987

"priority": priority,

2988

"servicename": "Mandos",

2989

"use_dbus": "True",

2990

"use_ipv6": "True",

2991

"debuglevel": "",

2992

"restore": "True",

2993

"socket": "",

2994

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

2995

"foreground": "False",

2996

"zeroconf": "True",

2997

}

2998

del priority

2999

2327

server_defaults = { "interface": "",

2328

"address": "",

2329

"port": "",

2330

"debug": "False",

2331

"priority":

2332

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

2333

"servicename": "Mandos",

2334

"use_dbus": "True",

2335

"use_ipv6": "True",

2336

"debuglevel": "",

2337

"restore": "True",

2338

"socket": "",

2339

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

2340

"foreground": "False",

2341

}

2342

3000

2343

# Parse config file for server-global settings

3001

2344

server_config = configparser.SafeConfigParser(server_defaults)

3002

2345

del server_defaults

3003

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

2346

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

2347

"mandos.conf"))

3004

2348

# Convert the SafeConfigParser object to a dict

3005

2349

server_settings = server_config.defaults()

3006

2350

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

3007

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

3008

"foreground", "zeroconf"):

2351

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

3009

2352

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

3010

2353

option)

3011

2354

if server_settings["port"]:

3021

2364

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

3022

2365

["socket"])

3023

2366

del server_config

3024

2367

3025

2368

# Override the settings from the config file with command line

3026

2369

# options, if set.

3027

2370

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

3028

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

3029

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

3030

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

2371

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

2372

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

2373

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

3031

2374

value = getattr(options, option)

3032

2375

if value is not None:

3033

2376

server_settings[option] = value

3034

2377

del options

3035

2378

# Force all strings to be unicode

3036

2379

for option in server_settings.keys():

3037

if isinstance(server_settings[option], bytes):

3038

server_settings[option] = (server_settings[option]

3039

.decode("utf-8"))

3040

# Force all boolean options to be boolean

3041

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

3042

"foreground", "zeroconf"):

3043

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

2380

if type(server_settings[option]) is str:

2381

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

3044

2382

# Debug implies foreground

3045

2383

if server_settings["debug"]:

3046

2384

server_settings["foreground"] = True

3047

2385

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

3048

2386

3049

2387

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

3050

3051

if (not server_settings["zeroconf"]

3052

and not (server_settings["port"]

3053

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

3054

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

3055

2388

3056

2389

# For convenience

3057

2390

debug = server_settings["debug"]

3058

2391

debuglevel = server_settings["debuglevel"]

3061

2394

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

3062

2395

stored_state_file)

3063

2396

foreground = server_settings["foreground"]

3064

zeroconf = server_settings["zeroconf"]

3065

2397

3066

2398

if debug:

3067

2399

initlogger(debug, logging.DEBUG)

3068

2400

else:

3071

2403

else:

3072

2404

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

3073

2405

initlogger(debug, level)

3074

2406

3075

2407

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

3076

syslogger.setFormatter(

3077

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

3078

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

3079

server_settings["servicename"])))

3080

2408

syslogger.setFormatter(logging.Formatter

2409

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

2410

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

2411

.format(server_settings

2412

["servicename"])))

2413

3081

2414

# Parse config file with clients

3082

2415

client_config = configparser.SafeConfigParser(Client

3083

2416

.client_defaults)

3084

2417

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

3085

2418

"clients.conf"))

3086

2419

3087

2420

global mandos_dbus_service

3088

2421

mandos_dbus_service = None

3089

3090

socketfd = None

3091

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

3092

socketfd = server_settings["socket"]

3093

tcp_server = MandosServer(

3094

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

3095

ClientHandler,

3096

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

3097

use_ipv6=use_ipv6,

3098

gnutls_priority=server_settings["priority"],

3099

use_dbus=use_dbus,

3100

socketfd=socketfd)

2422

2423

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

2424

server_settings["port"]),

2425

ClientHandler,

2426

interface=(server_settings["interface"]

2427

or None),

2428

use_ipv6=use_ipv6,

2429

gnutls_priority=

2430

server_settings["priority"],

2431

use_dbus=use_dbus,

2432

socketfd=(server_settings["socket"]

2433

or None))

3101

2434

if not foreground:

3102

pidfilename = "/run/mandos.pid"

3103

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

3104

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

2435

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

3105

2436

pidfile = None

3106

2437

try:

3107

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

2438

pidfile = open(pidfilename, "w")

3108

2439

except IOError as e:

3109

2440

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

3110

2441

exc_info=e)

3111

3112

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

3113

("mandos", "mandos"),

3114

("nobody", "nogroup")):

2442

2443

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

3115

2444

try:

3116

2445

uid = pwd.getpwnam(name).pw_uid

3117

gid = pwd.getpwnam(group).pw_gid

2446

gid = pwd.getpwnam(name).pw_gid

3118

2447

break

3119

2448

except KeyError:

3120

2449

continue

3124

2453

try:

3125

2454

os.setgid(gid)

3126

2455

os.setuid(uid)

3127

if debug:

3128

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

3129

gid))

3130

2456

except OSError as error:

3131

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

3132

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

3133

2457

if error.errno != errno.EPERM:

3134

raise

3135

2458

raise error

2459

3136

2460

if debug:

3137

2461

# Enable all possible GnuTLS debugging

3138

2462

3139

2463

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

3140

2464

# - GnuTLS manual

3141

gnutls.global_set_log_level(11)

3142

3143

@gnutls.log_func

2465

gnutls.library.functions.gnutls_global_set_log_level(11)

2466

2467

@gnutls.library.types.gnutls_log_func

3144

2468

def debug_gnutls(level, string):

3145

2469

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

3146

3147

gnutls.global_set_log_function(debug_gnutls)

3148

2470

2471

(gnutls.library.functions

2472

.gnutls_global_set_log_function(debug_gnutls))

2473

3149

2474

# Redirect stdin so all checkers get /dev/null

3150

2475

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

3151

2476

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

3152

2477

if null > 2:

3153

2478

os.close(null)

3154

2479

3155

2480

# Need to fork before connecting to D-Bus

3156

2481

if not foreground:

3157

2482

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

3158

2483

daemon()

3159

3160

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

3161

# to inform GLib that threads will be used.

3162

GLib.threads_init()

3163

2484

2485

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

2486

# need to inform gobject that threads will be used.

2487

gobject.threads_init()

2488

3164

2489

global main_loop

3165

2490

# From the Avahi example code

3166

2491

DBusGMainLoop(set_as_default=True)

3167

main_loop = GLib.MainLoop()

2492

main_loop = gobject.MainLoop()

3168

2493

bus = dbus.SystemBus()

3169

2494

# End of Avahi example code

3170

2495

if use_dbus:

3171

2496

try:

3172

2497

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

3173

bus,

3174

do_not_queue=True)

3175

old_bus_name = dbus.service.BusName(

3176

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

3177

do_not_queue=True)

3178

except dbus.exceptions.DBusException as e:

2498

bus, do_not_queue=True)

2499

old_bus_name = (dbus.service.BusName

2500

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

2501

do_not_queue=True))

2502

except dbus.exceptions.NameExistsException as e:

3179

2503

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

3180

2504

use_dbus = False

3181

2505

server_settings["use_dbus"] = False

3182

2506

tcp_server.use_dbus = False

3183

if zeroconf:

3184

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3185

service = AvahiServiceToSyslog(

3186

name=server_settings["servicename"],

3187

servicetype="_mandos._tcp",

3188

protocol=protocol,

3189

bus=bus)

3190

if server_settings["interface"]:

3191

service.interface = if_nametoindex(

3192

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

3193

2507

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2508

service = AvahiServiceToSyslog(name =

2509

server_settings["servicename"],

2510

servicetype = "_mandos._tcp",

2511

protocol = protocol, bus = bus)

2512

if server_settings["interface"]:

2513

service.interface = (if_nametoindex

2514

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

2515

3194

2516

global multiprocessing_manager

3195

2517

multiprocessing_manager = multiprocessing.Manager()

3196

2518

3197

2519

client_class = Client

3198

2520

if use_dbus:

3199

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

3200

2521

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

2522

3201

2523

client_settings = Client.config_parser(client_config)

3202

2524

old_client_settings = {}

3203

2525

clients_data = {}

3204

3205

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

3206

global wnull

3207

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

3208

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

3209

# mode

3210

if debug or not foreground:

3211

wnull.close()

3212

2526

3213

2527

# Get client data and settings from last running state.

3214

2528

if server_settings["restore"]:

3215

2529

try:

3216

2530

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

3217

if sys.version_info.major == 2:

3218

clients_data, old_client_settings = pickle.load(

3219

stored_state)

3220

else:

3221

bytes_clients_data, bytes_old_client_settings = (

3222

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

3223

# Fix bytes to strings

3224

# clients_data

3225

# .keys()

3226

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

3227

if isinstance(key, bytes)

3228

else key): value

3229

for key, value in

3230

bytes_clients_data.items()}

3231

del bytes_clients_data

3232

for key in clients_data:

3233

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

3234

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

3235

for k, v in

3236

clients_data[key].items()}

3237

clients_data[key] = value

3238

# .client_structure

3239

value["client_structure"] = [

3240

(s.decode("utf-8")

3241

if isinstance(s, bytes)

3242

else s) for s in

3243

value["client_structure"]]

3244

# .name & .host

3245

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

3246

if isinstance(value[k], bytes):

3247

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

3248

if "key_id" not in value:

3249

value["key_id"] = ""

3250

elif "fingerprint" not in value:

3251

value["fingerprint"] = ""

3252

# old_client_settings

3253

# .keys()

3254

old_client_settings = {

3255

(key.decode("utf-8")

3256

if isinstance(key, bytes)

3257

else key): value

3258

for key, value in

3259

bytes_old_client_settings.items()}

3260

del bytes_old_client_settings

3261

# .host

3262

for value in old_client_settings.values():

3263

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

3264

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

3265

.decode("utf-8"))

2531

clients_data, old_client_settings = (pickle.load

2532

(stored_state))

3266

2533

os.remove(stored_state_path)

3267

2534

except IOError as e:

3268

2535

if e.errno == errno.ENOENT:

3269

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

3270

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

2536

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

2537

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

3271

2538

else:

3272

2539

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

3273

2540

exc_info=e)

3274

2541

raise

3275

2542

except EOFError as e:

3276

2543

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

3277

"EOFError:",

3278

exc_info=e)

3279

2544

"EOFError:", exc_info=e)

2545

3280

2546

with PGPEngine() as pgp:

3281

for client_name, client in clients_data.items():

3282

# Skip removed clients

3283

if client_name not in client_settings:

3284

continue

3285

2547

for client_name, client in clients_data.iteritems():

3286

2548

# Decide which value to use after restoring saved state.

3287

2549

# We have three different values: Old config file,

3288

2550

# new config file, and saved state.

3293

2555

# For each value in new config, check if it

3294

2556

# differs from the old config value (Except for

3295

2557

# the "secret" attribute)

3296

if (name != "secret"

3297

and (value !=

3298

old_client_settings[client_name][name])):

2558

if (name != "secret" and

2559

value != old_client_settings[client_name]

2560

[name]):

3299

2561

client[name] = value

3300

2562

except KeyError:

3301

2563

pass

3302

2564

3303

2565

# Clients who has passed its expire date can still be

3304

# enabled if its last checker was successful. A Client

2566

# enabled if its last checker was successful. Clients

3305

2567

# whose checker succeeded before we stored its state is

3306

2568

# assumed to have successfully run all checkers during

3307

2569

# downtime.

3309

2571

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

3310

2572

if not client["last_checked_ok"]:

3311

2573

logger.warning(

3312

"disabling client {} - Client never "

3313

"performed a successful checker".format(

3314

client_name))

2574

"disabling client {0} - Client never "

2575

"performed a successful checker"

2576

.format(client_name))

3315

2577

client["enabled"] = False

3316

2578

elif client["last_checker_status"] != 0:

3317

2579

logger.warning(

3318

"disabling client {} - Client last"

3319

" checker failed with error code"

3320

" {}".format(

3321

client_name,

3322

client["last_checker_status"]))

2580

"disabling client {0} - Client "

2581

"last checker failed with error code {1}"

2582

.format(client_name,

2583

client["last_checker_status"]))

3323

2584

client["enabled"] = False

3324

2585

else:

3325

client["expires"] = (

3326

datetime.datetime.utcnow()

3327

+ client["timeout"])

2586

client["expires"] = (datetime.datetime

2587

.utcnow()

2588

+ client["timeout"])

3328

2589

logger.debug("Last checker succeeded,"

3329

" keeping {} enabled".format(

3330

client_name))

2590

" keeping {0} enabled"

2591

.format(client_name))

3331

2592

try:

3332

client["secret"] = pgp.decrypt(

3333

client["encrypted_secret"],

3334

client_settings[client_name]["secret"])

2593

client["secret"] = (

2594

pgp.decrypt(client["encrypted_secret"],

2595

client_settings[client_name]

2596

["secret"]))

3335

2597

except PGPError:

3336

2598

# If decryption fails, we use secret from new settings

3337

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

3338

client_name))

3339

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

3340

["secret"])

3341

2599

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

2600

.format(client_name))

2601

client["secret"] = (

2602

client_settings[client_name]["secret"])

2603

3342

2604

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

3343

2605

for client_name in (set(old_client_settings)

3344

2606

- set(client_settings)):

3346

2608

for client_name in (set(client_settings)

3347

2609

- set(old_client_settings)):

3348

2610

clients_data[client_name] = client_settings[client_name]

3349

2611

3350

2612

# Create all client objects

3351

for client_name, client in clients_data.items():

2613

for client_name, client in clients_data.iteritems():

3352

2614

tcp_server.clients[client_name] = client_class(

3353

name=client_name,

3354

settings=client,

3355

server_settings=server_settings)

3356

2615

name = client_name, settings = client)

2616

3357

2617

if not tcp_server.clients:

3358

2618

logger.warning("No clients defined")

3359

2619

3360

2620

if not foreground:

3361

2621

if pidfile is not None:

3362

pid = os.getpid()

3363

2622

try:

3364

2623

with pidfile:

3365

print(pid, file=pidfile)

2624

pid = os.getpid()

2625

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

3366

2626

except IOError:

3367

2627

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

3368

2628

pidfilename, pid)

3369

2629

del pidfile

3370

2630

del pidfilename

3371

3372

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

3373

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3374

lambda: main_loop.quit() and False)

3375

2631

2632

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

2633

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

2634

3376

2635

if use_dbus:

3377

3378

@alternate_dbus_interfaces(

3379

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

3380

class MandosDBusService(DBusObjectWithObjectManager):

2636

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

2637

"se.bsnet.fukt.Mandos"})

2638

class MandosDBusService(DBusObjectWithProperties):

3381

2639

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

3382

3383

2640

def __init__(self):

3384

2641

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

3385

3386

2642

_interface = "se.recompile.Mandos"

3387

2643

2644

@dbus_interface_annotations(_interface)

2645

def _foo(self):

2646

return { "org.freedesktop.DBus.Property"

2647

".EmitsChangedSignal":

2648

"false"}

2649

3388

2650

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

3389

2651

def ClientAdded(self, objpath):

3390

2652

"D-Bus signal"

3391

2653

pass

3392

2654

3393

2655

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

3394

def ClientNotFound(self, key_id, address):

2656

def ClientNotFound(self, fingerprint, address):

3395

2657

"D-Bus signal"

3396

2658

pass

3397

3398

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

3399

"true"})

2659

3400

2660

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

3401

2661

def ClientRemoved(self, objpath, name):

3402

2662

"D-Bus signal"

3403

2663

pass

3404

3405

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

3406

"true"})

2664

3407

2665

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

3408

2666

def GetAllClients(self):

3409

2667

"D-Bus method"

3410

return dbus.Array(c.dbus_object_path for c in

3411

tcp_server.clients.values())

3412

3413

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

3414

"true"})

2668

return dbus.Array(c.dbus_object_path

2669

for c in

2670

tcp_server.clients.itervalues())

2671

3415

2672

@dbus.service.method(_interface,

3416

2673

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

3417

2674

def GetAllClientsWithProperties(self):

3418

2675

"D-Bus method"

3419

2676

return dbus.Dictionary(

3420

{c.dbus_object_path: c.GetAll(

3421

"se.recompile.Mandos.Client")

3422

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

2677

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

2678

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

3423

2679

signature="oa{sv}")

3424

2680

3425

2681

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

3426

2682

def RemoveClient(self, object_path):

3427

2683

"D-Bus method"

3428

for c in tcp_server.clients.values():

2684

for c in tcp_server.clients.itervalues():

3429

2685

if c.dbus_object_path == object_path:

3430

2686

del tcp_server.clients[c.name]

3431

2687

c.remove_from_connection()

3432

# Don't signal the disabling

2688

# Don't signal anything except ClientRemoved

3433

2689

c.disable(quiet=True)

3434

# Emit D-Bus signal for removal

3435

self.client_removed_signal(c)

2690

# Emit D-Bus signal

2691

self.ClientRemoved(object_path, c.name)

3436

2692

return

3437

2693

raise KeyError(object_path)

3438

2694

3439

2695

del _interface

3440

3441

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3442

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

3443

def GetManagedObjects(self):

3444

"""D-Bus method"""

3445

return dbus.Dictionary(

3446

{client.dbus_object_path:

3447

dbus.Dictionary(

3448

{interface: client.GetAll(interface)

3449

for interface in

3450

client._get_all_interface_names()})

3451

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

3452

3453

def client_added_signal(self, client):

3454

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

3455

if use_dbus:

3456

# New standard signal

3457

self.InterfacesAdded(

3458

client.dbus_object_path,

3459

dbus.Dictionary(

3460

{interface: client.GetAll(interface)

3461

for interface in

3462

client._get_all_interface_names()}))

3463

# Old signal

3464

self.ClientAdded(client.dbus_object_path)

3465

3466

def client_removed_signal(self, client):

3467

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

3468

if use_dbus:

3469

# New standard signal

3470

self.InterfacesRemoved(

3471

client.dbus_object_path,

3472

client._get_all_interface_names())

3473

# Old signal

3474

self.ClientRemoved(client.dbus_object_path,

3475

client.name)

3476

2696

3477

2697

mandos_dbus_service = MandosDBusService()

3478

3479

# Save modules to variables to exempt the modules from being

3480

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

3481

mp = multiprocessing

3482

wn = wnull

3483

2698

3484

2699

def cleanup():

3485

2700

"Cleanup function; run on exit"

3486

if zeroconf:

3487

service.cleanup()

3488

3489

mp.active_children()

3490

wn.close()

2701

service.cleanup()

2702

2703

multiprocessing.active_children()

3491

2704

if not (tcp_server.clients or client_settings):

3492

2705

return

3493

2706

3494

2707

# Store client before exiting. Secrets are encrypted with key

3495

2708

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

3496

2709

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

3497

2710

clients = {}

3498

2711

with PGPEngine() as pgp:

3499

for client in tcp_server.clients.values():

2712

for client in tcp_server.clients.itervalues():

3500

2713

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

3501

2714

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

3502

2715

key)

3503

2716

client_dict = {}

3504

2717

3505

2718

# A list of attributes that can not be pickled

3506

2719

# + secret.

3507

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

3508

"checker", "server_settings"}

3509

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

3510

.Object):

2720

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

2721

"checker"))

2722

for name, typ in (inspect.getmembers

2723

(dbus.service.Object)):

3511

2724

exclude.add(name)

3512

2725

3513

2726

client_dict["encrypted_secret"] = (client

3514

2727

.encrypted_secret)

3515

2728

for attr in client.client_structure:

3516

2729

if attr not in exclude:

3517

2730

client_dict[attr] = getattr(client, attr)

3518

2731

3519

2732

clients[client.name] = client_dict

3520

2733

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

3521

2734

3522

2735

try:

3523

with tempfile.NamedTemporaryFile(

3524

mode='wb',

3525

suffix=".pickle",

3526

prefix='clients-',

3527

dir=os.path.dirname(stored_state_path),

3528

delete=False) as stored_state:

3529

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

3530

protocol=2)

3531

tempname = stored_state.name

2736

with (tempfile.NamedTemporaryFile

2737

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

2738

dir=os.path.dirname(stored_state_path),

2739

delete=False)) as stored_state:

2740

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

2741

tempname=stored_state.name

3532

2742

os.rename(tempname, stored_state_path)

3533

2743

except (IOError, OSError) as e:

3534

2744

if not debug:

3537

2747

except NameError:

3538

2748

pass

3539

2749

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

3540

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

2750

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

3541

2751

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

3542

2752

else:

3543

2753

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

3544

2754

exc_info=e)

3545

raise

3546

2755

raise e

2756

3547

2757

# Delete all clients, and settings from config

3548

2758

while tcp_server.clients:

3549

2759

name, client = tcp_server.clients.popitem()

3550

2760

if use_dbus:

3551

2761

client.remove_from_connection()

3552

# Don't signal the disabling

2762

# Don't signal anything except ClientRemoved

3553

2763

client.disable(quiet=True)

3554

# Emit D-Bus signal for removal

3555

2764

if use_dbus:

3556

mandos_dbus_service.client_removed_signal(client)

2765

# Emit D-Bus signal

2766

mandos_dbus_service.ClientRemoved(client

2767

.dbus_object_path,

2768

client.name)

3557

2769

client_settings.clear()

3558

2770

3559

2771

atexit.register(cleanup)

3560

3561

for client in tcp_server.clients.values():

2772

2773

for client in tcp_server.clients.itervalues():

3562

2774

if use_dbus:

3563

# Emit D-Bus signal for adding

3564

mandos_dbus_service.client_added_signal(client)

2775

# Emit D-Bus signal

2776

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3565

2777

# Need to initiate checking of clients

3566

2778

if client.enabled:

3567

2779

client.init_checker()

3568

2780

3569

2781

tcp_server.enable()

3570

2782

tcp_server.server_activate()

3571

2783

3572

2784

# Find out what port we got

3573

if zeroconf:

3574

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

2785

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

3575

2786

if use_ipv6:

3576

2787

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

3577

2788

" flowinfo %d, scope_id %d",

3579

2790

else: # IPv4

3580

2791

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

3581

2792

*tcp_server.socket.getsockname())

3582

3583

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

3584

2793

2794

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

2795

3585

2796

try:

3586

if zeroconf:

3587

# From the Avahi example code

3588

try:

3589

service.activate()

3590

except dbus.exceptions.DBusException as error:

3591

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

3592

cleanup()

3593

sys.exit(1)

3594

# End of Avahi example code

3595

3596

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

3597

lambda *args, **kwargs:

3598

(tcp_server.handle_request

3599

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

3600

2797

# From the Avahi example code

2798

try:

2799

service.activate()

2800

except dbus.exceptions.DBusException as error:

2801

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

2802

cleanup()

2803

sys.exit(1)

2804

# End of Avahi example code

2805

2806

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

2807

lambda *args, **kwargs:

2808

(tcp_server.handle_request

2809

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

2810

3601

2811

logger.debug("Starting main loop")

3602

2812

main_loop.run()

3603

2813

except AvahiError as error:

3612

2822

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

3613

2823

cleanup()

3614

2824

3615

3616

2825

if __name__ == '__main__':

3617

2826

main()