/mandos/release : revision 237.7.749

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#!/usr/bin/python

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

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#

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#!/usr/bin/python3 -bI

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# -*- mode: python; after-save-hook: (lambda () (let ((command (if (fboundp 'file-local-name) (file-local-name (buffer-file-name)) (or (file-remote-p (buffer-file-name) 'localname) (buffer-file-name))))) (if (= (progn (if (get-buffer "*Test*") (kill-buffer "*Test*")) (process-file-shell-command (format "%s --check" (shell-quote-argument command)) nil "*Test*")) 0) (let ((w (get-buffer-window "*Test*"))) (if w (delete-window w))) (progn (with-current-buffer "*Test*" (compilation-mode)) (display-buffer "*Test*" '(display-buffer-in-side-window)))))); coding: utf-8 -*-

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#

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

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#

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#

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

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# service publisher, downloaded from

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

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

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

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

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#

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#

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# Everything else is

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#

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

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

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#

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# This file is part of Mandos.

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#

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

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

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

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# (at your option) any later version.

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#

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

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

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

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# WITHOUT ANY WARRANTY; without even the implied warranty of

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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# GNU General Public License for more details.

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#

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#

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

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# along with this program. If not, see

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

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#

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

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#

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

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#

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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try:

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from future_builtins import *

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except ImportError:

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pass

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import SocketServer as socketserver

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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66

import struct

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import fcntl

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import functools

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import cPickle as pickle

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import unittest

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import random

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import dbus

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import dbus.service

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import gobject

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import avahi

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import gi

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from gi.repository import GLib

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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if sys.version_info.major == 2:

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__metaclass__ = type

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str = unicode

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# Show warnings by default

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if not sys.warnoptions:

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import warnings

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warnings.simplefilter("default")

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# Try to find the value of SO_BINDTODEVICE:

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try:

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

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

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except AttributeError:

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try:

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# This is where SO_BINDTODEVICE was up to and including Python

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# 2.6, and also 3.2:

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from IN import SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.6.2"

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

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# Try running the C preprocessor:

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try:

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

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"/dev/stdin"],

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE)

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stdout = cc.communicate(

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

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

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except (OSError, ValueError, IndexError):

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# No value found

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SO_BINDTODEVICE = None

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if sys.version_info < (3, 2):

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configparser.Configparser = configparser.SafeConfigParser

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version = "1.8.9"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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logging.captureWarnings(True) # Show warnings via the logging system

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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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

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

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return interface_index

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def copy_function(func):

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

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility=logging.handlers.SysLogHandler.LOG_DAEMON,

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address="/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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pass

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class PGPEngine(object):

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class PGPEngine:

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

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def __init__(self):

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

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == b"gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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'--quiet']

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

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

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

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149

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def __enter__(self):

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220

return self

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221

152

222

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

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self._cleanup()

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return False

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156

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def __del__(self):

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self._cleanup()

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159

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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):

233

topdown=False):

164

234

for filename in files:

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235

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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241

172

242

def password_encode(self, password):

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

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

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

180

250

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

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return encoded

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183

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir=self.tempdir

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) as passfile:

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

189

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

259

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

266

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

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267

if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

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270

201

271

def decrypt(self, data, password):

202

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir = self.tempdir

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) as passfile:

273

with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

205

275

passfile.write(passphrase)

206

276

passfile.flush()

207

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

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

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278

'--passphrase-file',

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passfile.name]

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280

+ 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

215

= data)

281

stdin=subprocess.PIPE,

282

stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

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

216

285

if proc.returncode != 0:

217

286

raise PGPError(err)

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return decrypted_plaintext

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# Pretend that we have an Avahi module

291

class avahi:

292

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

293

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

294

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

295

PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

297

DBUS_NAME = "org.freedesktop.Avahi"

298

DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

299

DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

300

DBUS_PATH_SERVER = "/"

301

302

@staticmethod

303

def string_array_to_txt_array(t):

304

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

305

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

306

ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

307

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

311

SERVER_RUNNING = 2 # avahi-common/defs.h

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SERVER_COLLISION = 3 # avahi-common/defs.h

313

SERVER_FAILURE = 4 # avahi-common/defs.h

314

315

221

316

class AvahiError(Exception):

222

317

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

223

318

self.value = value

224

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

225

def __unicode__(self):

226

return unicode(repr(self.value))

319

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

320

**kwargs)

321

227

322

228

323

class AvahiServiceError(AvahiError):

229

324

pass

230

325

326

231

327

class AvahiGroupError(AvahiError):

232

328

pass

233

329

234

330

235

class AvahiService(object):

331

class AvahiService:

236

332

"""An Avahi (Zeroconf) service.

237

333

238

334

Attributes:

239

335

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

240

336

Used to optionally bind to the specified interface.

252

348

server: D-Bus Server

253

349

bus: dbus.SystemBus()

254

350

"""

255

256

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

257

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

258

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

259

protocol = avahi.PROTO_UNSPEC, bus = None):

351

352

def __init__(self,

353

interface=avahi.IF_UNSPEC,

354

name=None,

355

servicetype=None,

356

port=None,

357

TXT=None,

358

domain="",

359

host="",

360

max_renames=32768,

361

protocol=avahi.PROTO_UNSPEC,

362

bus=None):

260

363

self.interface = interface

261

364

self.name = name

262

365

self.type = servicetype

271

374

self.server = None

272

375

self.bus = bus

273

376

self.entry_group_state_changed_match = None

274

275

def rename(self):

377

378

def rename(self, remove=True):

276

379

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

277

380

if self.rename_count >= self.max_renames:

278

381

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

279

382

" after %i retries, exiting.",

280

383

self.rename_count)

281

384

raise AvahiServiceError("Too many renames")

282

self.name = unicode(self.server

283

.GetAlternativeServiceName(self.name))

385

self.name = str(

386

self.server.GetAlternativeServiceName(self.name))

387

self.rename_count += 1

284

388

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

285

389

self.name)

286

self.remove()

390

if remove:

391

self.remove()

287

392

try:

288

393

self.add()

289

394

except dbus.exceptions.DBusException as error:

290

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

291

self.cleanup()

292

os._exit(1)

293

self.rename_count += 1

294

395

if (error.get_dbus_name()

396

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

397

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

398

return self.rename(remove=False)

399

else:

400

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

401

self.cleanup()

402

os._exit(1)

403

295

404

def remove(self):

296

405

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

297

406

if self.entry_group_state_changed_match is not None:

299

408

self.entry_group_state_changed_match = None

300

409

if self.group is not None:

301

410

self.group.Reset()

302

411

303

412

def add(self):

304

413

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

305

414

self.remove()

322

431

dbus.UInt16(self.port),

323

432

avahi.string_array_to_txt_array(self.TXT))

324

433

self.group.Commit()

325

434

326

435

def entry_group_state_changed(self, state, error):

327

436

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

328

437

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

329

438

330

439

if state == avahi.ENTRY_GROUP_ESTABLISHED:

331

440

logger.debug("Zeroconf service established.")

332

441

elif state == avahi.ENTRY_GROUP_COLLISION:

334

443

self.rename()

335

444

elif state == avahi.ENTRY_GROUP_FAILURE:

336

445

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

337

unicode(error))

338

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

339

.format(error))

340

446

str(error))

447

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

448

341

449

def cleanup(self):

342

450

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

343

451

if self.group is not None:

348

456

pass

349

457

self.group = None

350

458

self.remove()

351

459

352

460

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

353

461

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

354

462

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

355

bad_states = { avahi.SERVER_INVALID:

356

"Zeroconf server invalid",

357

avahi.SERVER_REGISTERING: None,

358

avahi.SERVER_COLLISION:

359

"Zeroconf server name collision",

360

avahi.SERVER_FAILURE:

361

"Zeroconf server failure" }

463

bad_states = {

464

avahi.SERVER_INVALID: "Zeroconf server invalid",

465

avahi.SERVER_REGISTERING: None,

466

avahi.SERVER_COLLISION: "Zeroconf server name collision",

467

avahi.SERVER_FAILURE: "Zeroconf server failure",

468

}

362

469

if state in bad_states:

363

470

if bad_states[state] is not None:

364

471

if error is None:

367

474

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

368

475

self.cleanup()

369

476

elif state == avahi.SERVER_RUNNING:

370

self.add()

477

try:

478

self.add()

479

except dbus.exceptions.DBusException as error:

480

if (error.get_dbus_name()

481

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

482

logger.info("Local Zeroconf service name"

483

" collision.")

484

return self.rename(remove=False)

485

else:

486

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

487

self.cleanup()

488

os._exit(1)

371

489

else:

372

490

if error is None:

373

491

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

374

492

else:

375

493

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

376

494

377

495

def activate(self):

378

496

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

379

497

if self.server is None:

383

501

follow_name_owner_changes=True),

384

502

avahi.DBUS_INTERFACE_SERVER)

385

503

self.server.connect_to_signal("StateChanged",

386

self.server_state_changed)

504

self.server_state_changed)

387

505

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

388

506

389

507

390

508

class AvahiServiceToSyslog(AvahiService):

391

def rename(self):

509

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

392

510

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

393

ret = AvahiService.rename(self)

394

syslogger.setFormatter(logging.Formatter

395

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

396

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

397

.format(self.name)))

511

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

512

syslogger.setFormatter(logging.Formatter(

513

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

514

.format(self.name)))

398

515

return ret

399

516

400

517

401

def timedelta_to_milliseconds(td):

402

"Convert a datetime.timedelta() to milliseconds"

403

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

404

+ (td.seconds * 1000)

405

+ (td.microseconds // 1000))

406

407

408

class Client(object):

518

# Pretend that we have a GnuTLS module

519

class gnutls:

520

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

521

522

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

523

if library is None:

524

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

525

_library = ctypes.cdll.LoadLibrary(library)

526

del library

527

528

# Unless otherwise indicated, the constants and types below are

529

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

530

531

# Constants

532

E_SUCCESS = 0

533

E_INTERRUPTED = -52

534

E_AGAIN = -28

535

CRT_OPENPGP = 2

536

CRT_RAWPK = 3

537

CLIENT = 2

538

SHUT_RDWR = 0

539

CRD_CERTIFICATE = 1

540

E_NO_CERTIFICATE_FOUND = -49

541

X509_FMT_DER = 0

542

NO_TICKETS = 1<<10

543

ENABLE_RAWPK = 1<<18

544

CTYPE_PEERS = 3

545

KEYID_USE_SHA256 = 1 # gnutls/x509.h

546

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

547

548

# Types

549

class session_int(ctypes.Structure):

550

_fields_ = []

551

session_t = ctypes.POINTER(session_int)

552

553

class certificate_credentials_st(ctypes.Structure):

554

_fields_ = []

555

certificate_credentials_t = ctypes.POINTER(

556

certificate_credentials_st)

557

certificate_type_t = ctypes.c_int

558

559

class datum_t(ctypes.Structure):

560

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

561

('size', ctypes.c_uint)]

562

563

class openpgp_crt_int(ctypes.Structure):

564

_fields_ = []

565

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

566

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

567

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

568

credentials_type_t = ctypes.c_int

569

transport_ptr_t = ctypes.c_void_p

570

close_request_t = ctypes.c_int

571

572

# Exceptions

573

class Error(Exception):

574

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

575

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

576

# code is passed, convert it to a string with

577

# gnutls.strerror()

578

self.code = code

579

if message is None and code is not None:

580

message = gnutls.strerror(code)

581

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

582

message, *args)

583

584

class CertificateSecurityError(Error):

585

pass

586

587

# Classes

588

class Credentials:

589

def __init__(self):

590

self._c_object = gnutls.certificate_credentials_t()

591

gnutls.certificate_allocate_credentials(

592

ctypes.byref(self._c_object))

593

self.type = gnutls.CRD_CERTIFICATE

594

595

def __del__(self):

596

gnutls.certificate_free_credentials(self._c_object)

597

598

class ClientSession:

599

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

600

self._c_object = gnutls.session_t()

601

gnutls_flags = gnutls.CLIENT

602

if gnutls.check_version(b"3.5.6"):

603

gnutls_flags |= gnutls.NO_TICKETS

604

if gnutls.has_rawpk:

605

gnutls_flags |= gnutls.ENABLE_RAWPK

606

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

607

del gnutls_flags

608

gnutls.set_default_priority(self._c_object)

609

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

610

gnutls.handshake_set_private_extensions(self._c_object,

611

True)

612

self.socket = socket

613

if credentials is None:

614

credentials = gnutls.Credentials()

615

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

616

ctypes.cast(credentials._c_object,

617

ctypes.c_void_p))

618

self.credentials = credentials

619

620

def __del__(self):

621

gnutls.deinit(self._c_object)

622

623

def handshake(self):

624

return gnutls.handshake(self._c_object)

625

626

def send(self, data):

627

data = bytes(data)

628

data_len = len(data)

629

while data_len > 0:

630

data_len -= gnutls.record_send(self._c_object,

631

data[-data_len:],

632

data_len)

633

634

def bye(self):

635

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

636

637

# Error handling functions

638

def _error_code(result):

639

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

640

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

641

if result >= 0:

642

return result

643

if result == gnutls.E_NO_CERTIFICATE_FOUND:

644

raise gnutls.CertificateSecurityError(code=result)

645

raise gnutls.Error(code=result)

646

647

def _retry_on_error(result, func, arguments):

648

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

649

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

650

while result < 0:

651

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

652

return _error_code(result)

653

result = func(*arguments)

654

return result

655

656

# Unless otherwise indicated, the function declarations below are

657

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

658

659

# Functions

660

priority_set_direct = _library.gnutls_priority_set_direct

661

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

662

ctypes.POINTER(ctypes.c_char_p)]

663

priority_set_direct.restype = _error_code

664

665

init = _library.gnutls_init

666

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

667

init.restype = _error_code

668

669

set_default_priority = _library.gnutls_set_default_priority

670

set_default_priority.argtypes = [session_t]

671

set_default_priority.restype = _error_code

672

673

record_send = _library.gnutls_record_send

674

record_send.argtypes = [session_t, ctypes.c_void_p,

675

ctypes.c_size_t]

676

record_send.restype = ctypes.c_ssize_t

677

record_send.errcheck = _retry_on_error

678

679

certificate_allocate_credentials = (

680

_library.gnutls_certificate_allocate_credentials)

681

certificate_allocate_credentials.argtypes = [

682

ctypes.POINTER(certificate_credentials_t)]

683

certificate_allocate_credentials.restype = _error_code

684

685

certificate_free_credentials = (

686

_library.gnutls_certificate_free_credentials)

687

certificate_free_credentials.argtypes = [

688

certificate_credentials_t]

689

certificate_free_credentials.restype = None

690

691

handshake_set_private_extensions = (

692

_library.gnutls_handshake_set_private_extensions)

693

handshake_set_private_extensions.argtypes = [session_t,

694

ctypes.c_int]

695

handshake_set_private_extensions.restype = None

696

697

credentials_set = _library.gnutls_credentials_set

698

credentials_set.argtypes = [session_t, credentials_type_t,

699

ctypes.c_void_p]

700

credentials_set.restype = _error_code

701

702

strerror = _library.gnutls_strerror

703

strerror.argtypes = [ctypes.c_int]

704

strerror.restype = ctypes.c_char_p

705

706

certificate_type_get = _library.gnutls_certificate_type_get

707

certificate_type_get.argtypes = [session_t]

708

certificate_type_get.restype = _error_code

709

710

certificate_get_peers = _library.gnutls_certificate_get_peers

711

certificate_get_peers.argtypes = [session_t,

712

ctypes.POINTER(ctypes.c_uint)]

713

certificate_get_peers.restype = ctypes.POINTER(datum_t)

714

715

global_set_log_level = _library.gnutls_global_set_log_level

716

global_set_log_level.argtypes = [ctypes.c_int]

717

global_set_log_level.restype = None

718

719

global_set_log_function = _library.gnutls_global_set_log_function

720

global_set_log_function.argtypes = [log_func]

721

global_set_log_function.restype = None

722

723

deinit = _library.gnutls_deinit

724

deinit.argtypes = [session_t]

725

deinit.restype = None

726

727

handshake = _library.gnutls_handshake

728

handshake.argtypes = [session_t]

729

handshake.restype = _error_code

730

handshake.errcheck = _retry_on_error

731

732

transport_set_ptr = _library.gnutls_transport_set_ptr

733

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

734

transport_set_ptr.restype = None

735

736

bye = _library.gnutls_bye

737

bye.argtypes = [session_t, close_request_t]

738

bye.restype = _error_code

739

bye.errcheck = _retry_on_error

740

741

check_version = _library.gnutls_check_version

742

check_version.argtypes = [ctypes.c_char_p]

743

check_version.restype = ctypes.c_char_p

744

745

_need_version = b"3.3.0"

746

if check_version(_need_version) is None:

747

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

748

.format(_need_version))

749

750

_tls_rawpk_version = b"3.6.6"

751

has_rawpk = bool(check_version(_tls_rawpk_version))

752

753

if has_rawpk:

754

# Types

755

class pubkey_st(ctypes.Structure):

756

_fields = []

757

pubkey_t = ctypes.POINTER(pubkey_st)

758

759

x509_crt_fmt_t = ctypes.c_int

760

761

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

762

pubkey_init = _library.gnutls_pubkey_init

763

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

764

pubkey_init.restype = _error_code

765

766

pubkey_import = _library.gnutls_pubkey_import

767

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

768

x509_crt_fmt_t]

769

pubkey_import.restype = _error_code

770

771

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

772

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

773

ctypes.POINTER(ctypes.c_ubyte),

774

ctypes.POINTER(ctypes.c_size_t)]

775

pubkey_get_key_id.restype = _error_code

776

777

pubkey_deinit = _library.gnutls_pubkey_deinit

778

pubkey_deinit.argtypes = [pubkey_t]

779

pubkey_deinit.restype = None

780

else:

781

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

782

783

openpgp_crt_init = _library.gnutls_openpgp_crt_init

784

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

785

openpgp_crt_init.restype = _error_code

786

787

openpgp_crt_import = _library.gnutls_openpgp_crt_import

788

openpgp_crt_import.argtypes = [openpgp_crt_t,

789

ctypes.POINTER(datum_t),

790

openpgp_crt_fmt_t]

791

openpgp_crt_import.restype = _error_code

792

793

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

794

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

795

ctypes.POINTER(ctypes.c_uint)]

796

openpgp_crt_verify_self.restype = _error_code

797

798

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

799

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

800

openpgp_crt_deinit.restype = None

801

802

openpgp_crt_get_fingerprint = (

803

_library.gnutls_openpgp_crt_get_fingerprint)

804

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

805

ctypes.c_void_p,

806

ctypes.POINTER(

807

ctypes.c_size_t)]

808

openpgp_crt_get_fingerprint.restype = _error_code

809

810

if check_version(b"3.6.4"):

811

certificate_type_get2 = _library.gnutls_certificate_type_get2

812

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

813

certificate_type_get2.restype = _error_code

814

815

# Remove non-public functions

816

del _error_code, _retry_on_error

817

818

819

def call_pipe(connection, # : multiprocessing.Connection

820

func, *args, **kwargs):

821

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

822

823

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

824

return value on the provided multiprocessing.Connection.

825

"""

826

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

827

connection.close()

828

829

830

class Client:

409

831

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

410

832

411

833

Attributes:

412

834

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

413

835

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

414

836

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

415

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

416

to see if the client lives.

417

'None' if no process is running.

418

checker_callback_tag: a gobject event source tag, or None

837

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

838

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

839

running.

840

checker_callback_tag: a GLib event source tag, or None

419

841

checker_command: string; External command which is run to check

420

842

if client lives. %() expansions are done at

421

843

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

422

844

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

423

checker_initiator_tag: a gobject event source tag, or None

845

checker_initiator_tag: a GLib event source tag, or None

424

846

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

425

847

client_structure: Object describing what attributes a client has

426

848

and is used for storing the client at exit

427

849

current_checker_command: string; current running checker_command

428

disable_initiator_tag: a gobject event source tag, or None

850

disable_initiator_tag: a GLib event source tag, or None

429

851

enabled: bool()

430

852

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

431

uniquely identify the client

853

uniquely identify an OpenPGP client

854

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

855

a client using raw public keys

432

856

host: string; available for use by the checker command

433

857

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

434

858

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

436

860

last_checker_status: integer between 0 and 255 reflecting exit

437

861

status of last checker. -1 reflects crashed

438

862

checker, -2 means no checker completed yet.

863

last_checker_signal: The signal which killed the last checker, if

864

last_checker_status is -1

439

865

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

440

866

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

441

867

D-Bus identifiers

448

874

disabled, or None

449

875

server_settings: The server_settings dict from main()

450

876

"""

451

877

452

878

runtime_expansions = ("approval_delay", "approval_duration",

453

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

879

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

454

880

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

455

881

"last_approval_request", "last_checked_ok",

456

882

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

457

client_defaults = { "timeout": "PT5M",

458

"extended_timeout": "PT15M",

459

"interval": "PT2M",

460

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

461

"host": "",

462

"approval_delay": "PT0S",

463

"approval_duration": "PT1S",

464

"approved_by_default": "True",

465

"enabled": "True",

466

}

467

468

def timeout_milliseconds(self):

469

"Return the 'timeout' attribute in milliseconds"

470

return timedelta_to_milliseconds(self.timeout)

471

472

def extended_timeout_milliseconds(self):

473

"Return the 'extended_timeout' attribute in milliseconds"

474

return timedelta_to_milliseconds(self.extended_timeout)

475

476

def interval_milliseconds(self):

477

"Return the 'interval' attribute in milliseconds"

478

return timedelta_to_milliseconds(self.interval)

479

480

def approval_delay_milliseconds(self):

481

return timedelta_to_milliseconds(self.approval_delay)

482

883

client_defaults = {

884

"timeout": "PT5M",

885

"extended_timeout": "PT15M",

886

"interval": "PT2M",

887

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

888

"host": "",

889

"approval_delay": "PT0S",

890

"approval_duration": "PT1S",

891

"approved_by_default": "True",

892

"enabled": "True",

893

}

894

483

895

@staticmethod

484

896

def config_parser(config):

485

897

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

492

904

for client_name in config.sections():

493

905

section = dict(config.items(client_name))

494

906

client = settings[client_name] = {}

495

907

496

908

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

497

909

# Reformat values from string types to Python types

498

910

client["approved_by_default"] = config.getboolean(

499

911

client_name, "approved_by_default")

500

912

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

501

913

"enabled")

502

914

915

# Uppercase and remove spaces from key_id and fingerprint

916

# for later comparison purposes with return value from the

917

# key_id() and fingerprint() functions

918

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

919

.replace(" ", ""))

503

920

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

504

921

.replace(" ", ""))

505

922

if "secret" in section:

506

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

923

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

924

.encode("utf-8"),

925

"base64")

507

926

elif "secfile" in section:

508

927

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

509

928

(section["secfile"])),

510

929

"rb") as secfile:

511

930

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

512

931

else:

513

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

932

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

514

933

.format(section))

515

934

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

516

935

client["extended_timeout"] = string_to_delta(

524

943

client["last_approval_request"] = None

525

944

client["last_checked_ok"] = None

526

945

client["last_checker_status"] = -2

527

946

528

947

return settings

529

530

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

948

949

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

531

950

self.name = name

532

951

if server_settings is None:

533

952

server_settings = {}

534

953

self.server_settings = server_settings

535

954

# adding all client settings

536

for setting, value in settings.iteritems():

955

for setting, value in settings.items():

537

956

setattr(self, setting, value)

538

957

539

958

if self.enabled:

540

959

if not hasattr(self, "last_enabled"):

541

960

self.last_enabled = datetime.datetime.utcnow()

545

964

else:

546

965

self.last_enabled = None

547

966

self.expires = None

548

967

549

968

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

550

# Uppercase and remove spaces from fingerprint for later

551

# comparison purposes with return value from the fingerprint()

552

# function

969

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

553

970

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

554

971

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

555

972

datetime.datetime.utcnow())

556

973

557

974

# attributes specific for this server instance

558

975

self.checker = None

559

976

self.checker_initiator_tag = None

562

979

self.current_checker_command = None

563

980

self.approved = None

564

981

self.approvals_pending = 0

565

self.changedstate = (multiprocessing_manager

566

.Condition(multiprocessing_manager

567

.Lock()))

568

self.client_structure = [attr for attr in

569

self.__dict__.iterkeys()

982

self.changedstate = multiprocessing_manager.Condition(

983

multiprocessing_manager.Lock())

984

self.client_structure = [attr

985

for attr in self.__dict__.keys()

570

986

if not attr.startswith("_")]

571

987

self.client_structure.append("client_structure")

572

573

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

574

lambda obj:

575

isinstance(obj,

576

property)):

988

989

for name, t in inspect.getmembers(

990

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

577

991

if not name.startswith("_"):

578

992

self.client_structure.append(name)

579

993

580

994

# Send notice to process children that client state has changed

581

995

def send_changedstate(self):

582

996

with self.changedstate:

583

997

self.changedstate.notify_all()

584

998

585

999

def enable(self):

586

1000

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

587

1001

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

592

1006

self.last_enabled = datetime.datetime.utcnow()

593

1007

self.init_checker()

594

1008

self.send_changedstate()

595

1009

596

1010

def disable(self, quiet=True):

597

1011

"""Disable this client."""

598

1012

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

600

1014

if not quiet:

601

1015

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

602

1016

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

603

gobject.source_remove(self.disable_initiator_tag)

1017

GLib.source_remove(self.disable_initiator_tag)

604

1018

self.disable_initiator_tag = None

605

1019

self.expires = None

606

1020

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

607

gobject.source_remove(self.checker_initiator_tag)

1021

GLib.source_remove(self.checker_initiator_tag)

608

1022

self.checker_initiator_tag = None

609

1023

self.stop_checker()

610

1024

self.enabled = False

611

1025

if not quiet:

612

1026

self.send_changedstate()

613

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

1027

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

614

1028

return False

615

1029

616

1030

def __del__(self):

617

1031

self.disable()

618

1032

619

1033

def init_checker(self):

620

1034

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

621

1035

# and every interval from then on.

622

1036

if self.checker_initiator_tag is not None:

623

gobject.source_remove(self.checker_initiator_tag)

624

self.checker_initiator_tag = (gobject.timeout_add

625

(self.interval_milliseconds(),

626

self.start_checker))

1037

GLib.source_remove(self.checker_initiator_tag)

1038

self.checker_initiator_tag = GLib.timeout_add(

1039

random.randrange(int(self.interval.total_seconds() * 1000

1040

+ 1)),

1041

self.start_checker)

627

1042

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

628

1043

if self.disable_initiator_tag is not None:

629

gobject.source_remove(self.disable_initiator_tag)

630

self.disable_initiator_tag = (gobject.timeout_add

631

(self.timeout_milliseconds(),

632

self.disable))

1044

GLib.source_remove(self.disable_initiator_tag)

1045

self.disable_initiator_tag = GLib.timeout_add(

1046

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

633

1047

# Also start a new checker *right now*.

634

1048

self.start_checker()

635

636

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

1049

1050

def checker_callback(self, source, condition, connection,

1051

command):

637

1052

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

1053

# Read return code from connection (see call_pipe)

1054

returncode = connection.recv()

1055

connection.close()

1056

if self.checker is not None:

1057

self.checker.join()

638

1058

self.checker_callback_tag = None

639

1059

self.checker = None

640

if os.WIFEXITED(condition):

641

self.last_checker_status = os.WEXITSTATUS(condition)

1060

1061

if returncode >= 0:

1062

self.last_checker_status = returncode

1063

self.last_checker_signal = None

642

1064

if self.last_checker_status == 0:

643

1065

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

644

1066

vars(self))

645

1067

self.checked_ok()

646

1068

else:

647

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

648

vars(self))

1069

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

649

1070

else:

650

1071

self.last_checker_status = -1

1072

self.last_checker_signal = -returncode

651

1073

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

652

1074

vars(self))

653

1075

return False

1076

654

1077

def checked_ok(self):

655

1078

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

656

1079

self.last_checked_ok = datetime.datetime.utcnow()

657

1080

self.last_checker_status = 0

1081

self.last_checker_signal = None

658

1082

self.bump_timeout()

659

1083

660

1084

def bump_timeout(self, timeout=None):

661

1085

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

662

1086

if timeout is None:

663

1087

timeout = self.timeout

664

1088

if self.disable_initiator_tag is not None:

665

gobject.source_remove(self.disable_initiator_tag)

1089

GLib.source_remove(self.disable_initiator_tag)

666

1090

self.disable_initiator_tag = None

667

1091

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

668

self.disable_initiator_tag = (gobject.timeout_add

669

(timedelta_to_milliseconds

670

(timeout), self.disable))

1092

self.disable_initiator_tag = GLib.timeout_add(

1093

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

671

1094

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

672

1095

673

1096

def need_approval(self):

674

1097

self.last_approval_request = datetime.datetime.utcnow()

675

1098

676

1099

def start_checker(self):

677

1100

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

678

1101

679

1102

If a checker already exists, leave it running and do

680

1103

nothing."""

681

1104

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

686

1109

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

687

1110

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

688

1111

# should be.

689

690

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

691

try:

692

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

693

except (AttributeError, OSError) as error:

694

if (isinstance(error, OSError)

695

and error.errno != errno.ECHILD):

696

raise error

697

else:

698

if pid:

699

logger.warning("Checker was a zombie")

700

gobject.source_remove(self.checker_callback_tag)

701

self.checker_callback(pid, status,

702

self.current_checker_command)

1112

1113

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

1114

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

1115

self.checker.join()

1116

self.checker = None

703

1117

# Start a new checker if needed

704

1118

if self.checker is None:

705

1119

# Escape attributes for the shell

706

escaped_attrs = dict(

707

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

708

for attr in

709

self.runtime_expansions)

1120

escaped_attrs = {

1121

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

1122

for attr in self.runtime_expansions}

710

1123

try:

711

1124

command = self.checker_command % escaped_attrs

712

1125

except TypeError as error:

713

1126

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

714

self.checker_command, exc_info=error)

715

return True # Try again later

1127

self.checker_command,

1128

exc_info=error)

1129

return True # Try again later

716

1130

self.current_checker_command = command

717

try:

718

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

719

command, self.name)

720

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

721

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

722

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

723

# always replaced by /dev/null.)

724

# The exception is when not debugging but nevertheless

725

# running in the foreground; use the previously

726

# created wnull.

727

popen_args = {}

728

if (not self.server_settings["debug"]

729

and self.server_settings["foreground"]):

730

popen_args.update({"stdout": wnull,

731

"stderr": wnull })

732

self.checker = subprocess.Popen(command,

733

close_fds=True,

734

shell=True, cwd="/",

735

**popen_args)

736

except OSError as error:

737

logger.error("Failed to start subprocess",

738

exc_info=error)

739

return True

740

self.checker_callback_tag = (gobject.child_watch_add

741

(self.checker.pid,

742

self.checker_callback,

743

data=command))

744

# The checker may have completed before the gobject

745

# watch was added. Check for this.

746

try:

747

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

748

except OSError as error:

749

if error.errno == errno.ECHILD:

750

# This should never happen

751

logger.error("Child process vanished",

752

exc_info=error)

753

return True

754

raise

755

if pid:

756

gobject.source_remove(self.checker_callback_tag)

757

self.checker_callback(pid, status, command)

758

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

1131

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

1132

self.name)

1133

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

1134

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

1135

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

1136

# always replaced by /dev/null.)

1137

# The exception is when not debugging but nevertheless

1138

# running in the foreground; use the previously

1139

# created wnull.

1140

popen_args = {"close_fds": True,

1141

"shell": True,

1142

"cwd": "/"}

1143

if (not self.server_settings["debug"]

1144

and self.server_settings["foreground"]):

1145

popen_args.update({"stdout": wnull,

1146

"stderr": wnull})

1147

pipe = multiprocessing.Pipe(duplex=False)

1148

self.checker = multiprocessing.Process(

1149

target=call_pipe,

1150

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

1151

kwargs=popen_args)

1152

self.checker.start()

1153

self.checker_callback_tag = GLib.io_add_watch(

1154

GLib.IOChannel.unix_new(pipe[0].fileno()),

1155

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

1156

self.checker_callback, pipe[0], command)

1157

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

759

1158

return True

760

1159

761

1160

def stop_checker(self):

762

1161

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

763

1162

if self.checker_callback_tag:

764

gobject.source_remove(self.checker_callback_tag)

1163

GLib.source_remove(self.checker_callback_tag)

765

1164

self.checker_callback_tag = None

766

1165

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

767

1166

return

768

1167

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

769

try:

770

self.checker.terminate()

771

#time.sleep(0.5)

772

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

773

# self.checker.kill()

774

except OSError as error:

775

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

776

raise

1168

self.checker.terminate()

777

1169

self.checker = None

778

1170

779

1171

780

def dbus_service_property(dbus_interface, signature="v",

781

access="readwrite", byte_arrays=False):

1172

def dbus_service_property(dbus_interface,

1173

signature="v",

1174

access="readwrite",

1175

byte_arrays=False):

782

1176

"""Decorators for marking methods of a DBusObjectWithProperties to

783

1177

become properties on the D-Bus.

784

1178

785

1179

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

786

1180

and with one argument by "Set".

787

1181

788

1182

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

789

1183

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

790

1184

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

793

1187

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

794

1188

if byte_arrays and signature != "ay":

795

1189

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

796

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

1190

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

1191

797

1192

def decorator(func):

798

1193

func._dbus_is_property = True

799

1194

func._dbus_interface = dbus_interface

802

1197

func._dbus_name = func.__name__

803

1198

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

804

1199

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

805

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1200

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

806

1201

return func

1202

807

1203

return decorator

808

1204

809

1205

810

1206

def dbus_interface_annotations(dbus_interface):

811

1207

"""Decorator for marking functions returning interface annotations

812

1208

813

1209

Usage:

814

1210

815

1211

@dbus_interface_annotations("org.example.Interface")

816

1212

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

817

1213

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

818

1214

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

819

1215

"false"}

820

1216

"""

1217

821

1218

def decorator(func):

822

1219

func._dbus_is_interface = True

823

1220

func._dbus_interface = dbus_interface

824

1221

func._dbus_name = dbus_interface

825

1222

return func

1223

826

1224

return decorator

827

1225

828

1226

829

1227

def dbus_annotations(annotations):

830

1228

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

831

1229

Usage:

832

1230

1231

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

1232

"org.freedesktop.DBus.Property."

1233

"EmitsChangedSignal": "false"})

833

1234

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

834

1235

access="r")

835

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

836

"org.freedesktop.DBus.Property."

837

"EmitsChangedSignal": "false"})

838

1236

def Property_dbus_property(self):

839

1237

return dbus.Boolean(False)

1238

1239

See also the DBusObjectWithAnnotations class.

840

1240

"""

1241

841

1242

def decorator(func):

842

1243

func._dbus_annotations = annotations

843

1244

return func

1245

844

1246

return decorator

845

1247

846

1248

847

1249

class DBusPropertyException(dbus.exceptions.DBusException):

848

1250

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

849

1251

"""

850

def __unicode__(self):

851

return unicode(str(self))

1252

pass

852

1253

853

1254

854

1255

class DBusPropertyAccessException(DBusPropertyException):

863

1264

pass

864

1265

865

1266

866

class DBusObjectWithProperties(dbus.service.Object):

867

"""A D-Bus object with properties.

868

869

Classes inheriting from this can use the dbus_service_property

870

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

871

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

1267

class DBusObjectWithAnnotations(dbus.service.Object):

1268

"""A D-Bus object with annotations.

1269

1270

Classes inheriting from this can use the dbus_annotations

1271

decorator to add annotations to methods or signals.

872

1272

"""

873

1273

874

1274

@staticmethod

875

1275

def _is_dbus_thing(thing):

876

1276

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

877

1277

878

1278

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

879

1279

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

880

1280

"""

881

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

1281

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

882

1282

False)

883

1283

884

1284

def _get_all_dbus_things(self, thing):

885

1285

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

886

1286

"""

887

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

888

name),

1287

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

889

1288

athing.__get__(self))

890

1289

for cls in self.__class__.__mro__

891

1290

for name, athing in

892

inspect.getmembers(cls,

893

self._is_dbus_thing(thing)))

894

1291

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

1292

1293

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1294

out_signature="s",

1295

path_keyword='object_path',

1296

connection_keyword='connection')

1297

def Introspect(self, object_path, connection):

1298

"""Overloading of standard D-Bus method.

1299

1300

Inserts annotation tags on methods and signals.

1301

"""

1302

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

1303

connection)

1304

try:

1305

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

1306

1307

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

1308

# Add annotation tags

1309

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

1310

for tag in if_tag.getElementsByTagName(typ):

1311

annots = dict()

1312

for name, prop in (self.

1313

_get_all_dbus_things(typ)):

1314

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

1315

and prop._dbus_interface

1316

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

1317

annots.update(getattr(

1318

prop, "_dbus_annotations", {}))

1319

for name, value in annots.items():

1320

ann_tag = document.createElement(

1321

"annotation")

1322

ann_tag.setAttribute("name", name)

1323

ann_tag.setAttribute("value", value)

1324

tag.appendChild(ann_tag)

1325

# Add interface annotation tags

1326

for annotation, value in dict(

1327

itertools.chain.from_iterable(

1328

annotations().items()

1329

for name, annotations

1330

in self._get_all_dbus_things("interface")

1331

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

1332

)).items():

1333

ann_tag = document.createElement("annotation")

1334

ann_tag.setAttribute("name", annotation)

1335

ann_tag.setAttribute("value", value)

1336

if_tag.appendChild(ann_tag)

1337

# Fix argument name for the Introspect method itself

1338

if (if_tag.getAttribute("name")

1339

== dbus.INTROSPECTABLE_IFACE):

1340

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

1341

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

1342

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

1343

if (arg.getAttribute("direction")

1344

== "out"):

1345

arg.setAttribute("name",

1346

"xml_data")

1347

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

1348

document.unlink()

1349

except (AttributeError, xml.dom.DOMException,

1350

xml.parsers.expat.ExpatError) as error:

1351

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

1352

exc_info=error)

1353

return xmlstring

1354

1355

1356

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1357

"""A D-Bus object with properties.

1358

1359

Classes inheriting from this can use the dbus_service_property

1360

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

1361

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

1362

"""

1363

895

1364

def _get_dbus_property(self, interface_name, property_name):

896

1365

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

897

1366

property with the specified name and interface.

898

1367

"""

899

for cls in self.__class__.__mro__:

900

for name, value in (inspect.getmembers

901

(cls,

902

self._is_dbus_thing("property"))):

1368

for cls in self.__class__.__mro__:

1369

for name, value in inspect.getmembers(

1370

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

903

1371

if (value._dbus_name == property_name

904

1372

and value._dbus_interface == interface_name):

905

1373

return value.__get__(self)

906

1374

907

1375

# No such property

908

raise DBusPropertyNotFound(self.dbus_object_path + ":"

909

+ interface_name + "."

910

+ property_name)

911

912

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

1376

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

1377

self.dbus_object_path, interface_name, property_name))

1378

1379

@classmethod

1380

def _get_all_interface_names(cls):

1381

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

1382

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

1383

"_dbus_interface", None)

1384

for x in (inspect.getmro(cls))

1385

for attr in dir(x))

1386

if name is not None)

1387

1388

@dbus.service.method(dbus.PROPERTIES_IFACE,

1389

in_signature="ss",

913

1390

out_signature="v")

914

1391

def Get(self, interface_name, property_name):

915

1392

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

921

1398

if not hasattr(value, "variant_level"):

922

1399

return value

923

1400

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

924

1401

925

1402

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

926

1403

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

927

1404

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

933

1410

# The byte_arrays option is not supported yet on

934

1411

# signatures other than "ay".

935

1412

if prop._dbus_signature != "ay":

936

raise ValueError

937

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

938

for byte in value))

1413

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

1414

"'ay' signature {!r}"

1415

.format(prop._dbus_signature))

1416

value = dbus.ByteArray(bytes(value))

939

1417

prop(value)

940

941

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

1418

1419

@dbus.service.method(dbus.PROPERTIES_IFACE,

1420

in_signature="s",

942

1421

out_signature="a{sv}")

943

1422

def GetAll(self, interface_name):

944

1423

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

945

1424

standard.

946

1425

947

1426

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

948

1427

"""

949

1428

properties = {}

959

1438

if not hasattr(value, "variant_level"):

960

1439

properties[name] = value

961

1440

continue

962

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

963

value.variant_level+1)

1441

properties[name] = type(value)(

1442

value, variant_level=value.variant_level + 1)

964

1443

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

965

1444

1445

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

1446

def PropertiesChanged(self, interface_name, changed_properties,

1447

invalidated_properties):

1448

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

1449

standard.

1450

"""

1451

pass

1452

966

1453

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

967

1454

out_signature="s",

968

1455

path_keyword='object_path',

969

1456

connection_keyword='connection')

970

1457

def Introspect(self, object_path, connection):

971

1458

"""Overloading of standard D-Bus method.

972

1459

973

1460

Inserts property tags and interface annotation tags.

974

1461

"""

975

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

976

connection)

1462

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1463

object_path,

1464

connection)

977

1465

try:

978

1466

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

1467

979

1468

def make_tag(document, name, prop):

980

1469

e = document.createElement("property")

981

1470

e.setAttribute("name", name)

982

1471

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

983

1472

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

984

1473

return e

1474

985

1475

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

986

1476

# Add property tags

987

1477

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

990

1480

if prop._dbus_interface

991

1481

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

992

1482

if_tag.appendChild(tag)

993

# Add annotation tags

994

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

995

for tag in if_tag.getElementsByTagName(typ):

996

annots = dict()

997

for name, prop in (self.

998

_get_all_dbus_things(typ)):

999

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

1000

and prop._dbus_interface

1001

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

1002

annots.update(getattr

1003

(prop,

1004

"_dbus_annotations",

1005

{}))

1006

for name, value in annots.iteritems():

1007

ann_tag = document.createElement(

1008

"annotation")

1009

ann_tag.setAttribute("name", name)

1010

ann_tag.setAttribute("value", value)

1011

tag.appendChild(ann_tag)

1012

# Add interface annotation tags

1013

for annotation, value in dict(

1014

itertools.chain.from_iterable(

1015

annotations().iteritems()

1016

for name, annotations in

1017

self._get_all_dbus_things("interface")

1018

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

1019

)).iteritems():

1020

ann_tag = document.createElement("annotation")

1021

ann_tag.setAttribute("name", annotation)

1022

ann_tag.setAttribute("value", value)

1023

if_tag.appendChild(ann_tag)

1483

# Add annotation tags for properties

1484

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

1485

annots = dict()

1486

for name, prop in self._get_all_dbus_things(

1487

"property"):

1488

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

1489

and prop._dbus_interface

1490

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

1491

annots.update(getattr(

1492

prop, "_dbus_annotations", {}))

1493

for name, value in annots.items():

1494

ann_tag = document.createElement(

1495

"annotation")

1496

ann_tag.setAttribute("name", name)

1497

ann_tag.setAttribute("value", value)

1498

tag.appendChild(ann_tag)

1024

1499

# Add the names to the return values for the

1025

1500

# "org.freedesktop.DBus.Properties" methods

1026

1501

if (if_tag.getAttribute("name")

1045

1520

return xmlstring

1046

1521

1047

1522

1523

try:

1524

dbus.OBJECT_MANAGER_IFACE

1525

except AttributeError:

1526

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

1527

1528

1529

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1530

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

1531

1532

Classes inheriting from this exposes the standard

1533

GetManagedObjects call and the InterfacesAdded and

1534

InterfacesRemoved signals on the standard

1535

"org.freedesktop.DBus.ObjectManager" interface.

1536

1537

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

1538

manually.

1539

"""

1540

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1541

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

1542

def GetManagedObjects(self):

1543

"""This function must be overridden"""

1544

raise NotImplementedError()

1545

1546

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1547

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

1548

def InterfacesAdded(self, object_path, interfaces_and_properties):

1549

pass

1550

1551

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

1552

def InterfacesRemoved(self, object_path, interfaces):

1553

pass

1554

1555

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1556

out_signature="s",

1557

path_keyword='object_path',

1558

connection_keyword='connection')

1559

def Introspect(self, object_path, connection):

1560

"""Overloading of standard D-Bus method.

1561

1562

Override return argument name of GetManagedObjects to be

1563

"objpath_interfaces_and_properties"

1564

"""

1565

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1566

object_path,

1567

connection)

1568

try:

1569

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

1570

1571

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

1572

# Fix argument name for the GetManagedObjects method

1573

if (if_tag.getAttribute("name")

1574

== dbus.OBJECT_MANAGER_IFACE):

1575

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

1576

if (cn.getAttribute("name")

1577

== "GetManagedObjects"):

1578

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

1579

if (arg.getAttribute("direction")

1580

== "out"):

1581

arg.setAttribute(

1582

"name",

1583

"objpath_interfaces"

1584

"_and_properties")

1585

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

1586

document.unlink()

1587

except (AttributeError, xml.dom.DOMException,

1588

xml.parsers.expat.ExpatError) as error:

1589

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

1590

exc_info=error)

1591

return xmlstring

1592

1593

1048

1594

def datetime_to_dbus(dt, variant_level=0):

1049

1595

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

1050

1596

if dt is None:

1051

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

1052

return dbus.String(dt.isoformat(),

1053

variant_level=variant_level)

1597

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

1598

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

1054

1599

1055

1600

1056

1601

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1058

1603

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

1059

1604

interface names according to the "alt_interface_names" mapping.

1060

1605

Usage:

1061

1606

1062

1607

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

1063

1608

"net.example.AlternateInterface"})

1064

1609

class SampleDBusObject(dbus.service.Object):

1065

1610

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

1066

1611

def SampleDBusMethod():

1067

1612

pass

1068

1613

1069

1614

The above "SampleDBusMethod" on "SampleDBusObject" will be

1070

1615

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

1071

1616

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

1072

1617

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

1073

1618

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

1074

1619

1075

1620

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

1076

1621

(from DBusObjectWithProperties) and interfaces (from the

1077

1622

dbus_interface_annotations decorator).

1078

1623

"""

1624

1079

1625

def wrapper(cls):

1080

1626

for orig_interface_name, alt_interface_name in (

1081

alt_interface_names.iteritems()):

1627

alt_interface_names.items()):

1082

1628

attr = {}

1083

1629

interface_names = set()

1084

1630

# Go though all attributes of the class

1086

1632

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

1087

1633

# with the wrong interface name

1088

1634

if (not hasattr(attribute, "_dbus_interface")

1089

or not attribute._dbus_interface

1090

.startswith(orig_interface_name)):

1635

or not attribute._dbus_interface.startswith(

1636

orig_interface_name)):

1091

1637

continue

1092

1638

# Create an alternate D-Bus interface name based on

1093

1639

# the current name

1094

alt_interface = (attribute._dbus_interface

1095

.replace(orig_interface_name,

1096

alt_interface_name))

1640

alt_interface = attribute._dbus_interface.replace(

1641

orig_interface_name, alt_interface_name)

1097

1642

interface_names.add(alt_interface)

1098

1643

# Is this a D-Bus signal?

1099

1644

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

1100

1645

# Extract the original non-method undecorated

1101

1646

# function by black magic

1102

nonmethod_func = (dict(

1647

if sys.version_info.major == 2:

1648

nonmethod_func = (dict(

1103

1649

zip(attribute.func_code.co_freevars,

1104

attribute.__closure__))["func"]

1105

.cell_contents)

1650

attribute.__closure__))

1651

["func"].cell_contents)

1652

else:

1653

nonmethod_func = (dict(

1654

zip(attribute.__code__.co_freevars,

1655

attribute.__closure__))

1656

["func"].cell_contents)

1106

1657

# Create a new, but exactly alike, function

1107

1658

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

1108

1659

# with the alternate D-Bus interface name

1109

new_function = (dbus.service.signal

1110

(alt_interface,

1111

attribute._dbus_signature)

1112

(types.FunctionType(

1113

nonmethod_func.func_code,

1114

nonmethod_func.func_globals,

1115

nonmethod_func.func_name,

1116

nonmethod_func.func_defaults,

1117

nonmethod_func.func_closure)))

1660

new_function = copy_function(nonmethod_func)

1661

new_function = (dbus.service.signal(

1662

alt_interface,

1663

attribute._dbus_signature)(new_function))

1118

1664

# Copy annotations, if any

1119

1665

try:

1120

new_function._dbus_annotations = (

1121

dict(attribute._dbus_annotations))

1666

new_function._dbus_annotations = dict(

1667

attribute._dbus_annotations)

1122

1668

except AttributeError:

1123

1669

pass

1670

1124

1671

# Define a creator of a function to call both the

1125

1672

# original and alternate functions, so both the

1126

1673

# original and alternate signals gets sent when

1129

1676

"""This function is a scope container to pass

1130

1677

func1 and func2 to the "call_both" function

1131

1678

outside of its arguments"""

1679

1680

@functools.wraps(func2)

1132

1681

def call_both(*args, **kwargs):

1133

1682

"""This function will emit two D-Bus

1134

1683

signals by calling func1 and func2"""

1135

1684

func1(*args, **kwargs)

1136

1685

func2(*args, **kwargs)

1686

# Make wrapper function look like a D-Bus

1687

# signal

1688

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

1689

if name.startswith("_dbus_"):

1690

setattr(call_both, name, attr)

1691

1137

1692

return call_both

1138

1693

# Create the "call_both" function and add it to

1139

1694

# the class

1144

1699

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

1145

1700

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

1146

1701

# to the class.

1147

attr[attrname] = (dbus.service.method

1148

(alt_interface,

1149

attribute._dbus_in_signature,

1150

attribute._dbus_out_signature)

1151

(types.FunctionType

1152

(attribute.func_code,

1153

attribute.func_globals,

1154

attribute.func_name,

1155

attribute.func_defaults,

1156

attribute.func_closure)))

1702

attr[attrname] = (

1703

dbus.service.method(

1704

alt_interface,

1705

attribute._dbus_in_signature,

1706

attribute._dbus_out_signature)

1707

(copy_function(attribute)))

1157

1708

# Copy annotations, if any

1158

1709

try:

1159

attr[attrname]._dbus_annotations = (

1160

dict(attribute._dbus_annotations))

1710

attr[attrname]._dbus_annotations = dict(

1711

attribute._dbus_annotations)

1161

1712

except AttributeError:

1162

1713

pass

1163

1714

# Is this a D-Bus property?

1166

1717

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

1167

1718

# property with the alternate D-Bus interface

1168

1719

# name. Add it to the class.

1169

attr[attrname] = (dbus_service_property

1170

(alt_interface,

1171

attribute._dbus_signature,

1172

attribute._dbus_access,

1173

attribute

1174

._dbus_get_args_options

1175

["byte_arrays"])

1176

(types.FunctionType

1177

(attribute.func_code,

1178

attribute.func_globals,

1179

attribute.func_name,

1180

attribute.func_defaults,

1181

attribute.func_closure)))

1720

attr[attrname] = (dbus_service_property(

1721

alt_interface, attribute._dbus_signature,

1722

attribute._dbus_access,

1723

attribute._dbus_get_args_options

1724

["byte_arrays"])

1725

(copy_function(attribute)))

1182

1726

# Copy annotations, if any

1183

1727

try:

1184

attr[attrname]._dbus_annotations = (

1185

dict(attribute._dbus_annotations))

1728

attr[attrname]._dbus_annotations = dict(

1729

attribute._dbus_annotations)

1186

1730

except AttributeError:

1187

1731

pass

1188

1732

# Is this a D-Bus interface?

1191

1735

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

1192

1736

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

1193

1737

# to the class.

1194

attr[attrname] = (dbus_interface_annotations

1195

(alt_interface)

1196

(types.FunctionType

1197

(attribute.func_code,

1198

attribute.func_globals,

1199

attribute.func_name,

1200

attribute.func_defaults,

1201

attribute.func_closure)))

1738

attr[attrname] = (

1739

dbus_interface_annotations(alt_interface)

1740

(copy_function(attribute)))

1202

1741

if deprecate:

1203

1742

# Deprecate all alternate interfaces

1204

iname="_AlternateDBusNames_interface_annotation{0}"

1743

iname = "_AlternateDBusNames_interface_annotation{}"

1205

1744

for interface_name in interface_names:

1745

1206

1746

@dbus_interface_annotations(interface_name)

1207

1747

def func(self):

1208

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

1209

"true" }

1748

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

1749

"true"}

1210

1750

# Find an unused name

1211

1751

for aname in (iname.format(i)

1212

1752

for i in itertools.count()):

1216

1756

if interface_names:

1217

1757

# Replace the class with a new subclass of it with

1218

1758

# methods, signals, etc. as created above.

1219

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

1220

(cls,), attr)

1759

if sys.version_info.major == 2:

1760

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

1761

(cls, ), attr)

1762

else:

1763

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

1764

(cls, ), attr)

1221

1765

return cls

1766

1222

1767

return wrapper

1223

1768

1224

1769

1225

1770

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

1226

"se.bsnet.fukt.Mandos"})

1771

"se.bsnet.fukt.Mandos"})

1227

1772

class ClientDBus(Client, DBusObjectWithProperties):

1228

1773

"""A Client class using D-Bus

1229

1774

1230

1775

Attributes:

1231

1776

dbus_object_path: dbus.ObjectPath

1232

1777

bus: dbus.SystemBus()

1233

1778

"""

1234

1779

1235

1780

runtime_expansions = (Client.runtime_expansions

1236

+ ("dbus_object_path",))

1237

1781

+ ("dbus_object_path", ))

1782

1783

_interface = "se.recompile.Mandos.Client"

1784

1238

1785

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

1239

1240

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

1786

1787

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

1241

1788

self.bus = bus

1242

1789

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

1243

1790

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

1244

1791

# the D-Bus

1245

client_object_name = unicode(self.name).translate(

1792

client_object_name = str(self.name).translate(

1246

1793

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

1247

1794

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

1248

self.dbus_object_path = (dbus.ObjectPath

1249

("/clients/" + client_object_name))

1795

self.dbus_object_path = dbus.ObjectPath(

1796

"/clients/" + client_object_name)

1250

1797

DBusObjectWithProperties.__init__(self, self.bus,

1251

1798

self.dbus_object_path)

1252

1253

def notifychangeproperty(transform_func,

1254

dbus_name, type_func=lambda x: x,

1255

variant_level=1):

1799

1800

def notifychangeproperty(transform_func, dbus_name,

1801

type_func=lambda x: x,

1802

variant_level=1,

1803

invalidate_only=False,

1804

_interface=_interface):

1256

1805

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

1257

1806

its changes to DBus.

1258

1807

1259

1808

transform_fun: Function that takes a value and a variant_level

1260

1809

and transforms it to a D-Bus type.

1261

1810

dbus_name: D-Bus name of the variable

1263

1812

to the D-Bus. Default: no transform

1264

1813

variant_level: D-Bus variant level. Default: 1

1265

1814

"""

1266

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

1815

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

1816

1267

1817

def setter(self, value):

1268

1818

if hasattr(self, "dbus_object_path"):

1269

1819

if (not hasattr(self, attrname) or

1270

1820

type_func(getattr(self, attrname, None))

1271

1821

!= type_func(value)):

1272

dbus_value = transform_func(type_func(value),

1273

variant_level

1274

=variant_level)

1275

self.PropertyChanged(dbus.String(dbus_name),

1276

dbus_value)

1822

if invalidate_only:

1823

self.PropertiesChanged(

1824

_interface, dbus.Dictionary(),

1825

dbus.Array((dbus_name, )))

1826

else:

1827

dbus_value = transform_func(

1828

type_func(value),

1829

variant_level=variant_level)

1830

self.PropertyChanged(dbus.String(dbus_name),

1831

dbus_value)

1832

self.PropertiesChanged(

1833

_interface,

1834

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

1835

dbus_value}),

1836

dbus.Array())

1277

1837

setattr(self, attrname, value)

1278

1838

1279

1839

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

1280

1840

1281

1841

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1282

1842

approvals_pending = notifychangeproperty(dbus.Boolean,

1283

1843

"ApprovalPending",

1284

type_func = bool)

1844

type_func=bool)

1285

1845

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

1286

1846

last_enabled = notifychangeproperty(datetime_to_dbus,

1287

1847

"LastEnabled")

1288

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

1289

type_func = lambda checker:

1290

checker is not None)

1848

checker = notifychangeproperty(

1849

dbus.Boolean, "CheckerRunning",

1850

type_func=lambda checker: checker is not None)

1291

1851

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1292

1852

"LastCheckedOK")

1293

1853

last_checker_status = notifychangeproperty(dbus.Int16,

1296

1856

datetime_to_dbus, "LastApprovalRequest")

1297

1857

approved_by_default = notifychangeproperty(dbus.Boolean,

1298

1858

"ApprovedByDefault")

1299

approval_delay = notifychangeproperty(dbus.UInt64,

1300

"ApprovalDelay",

1301

type_func =

1302

timedelta_to_milliseconds)

1859

approval_delay = notifychangeproperty(

1860

dbus.UInt64, "ApprovalDelay",

1861

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

1303

1862

approval_duration = notifychangeproperty(

1304

1863

dbus.UInt64, "ApprovalDuration",

1305

type_func = timedelta_to_milliseconds)

1864

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

1306

1865

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

1307

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

1308

type_func =

1309

timedelta_to_milliseconds)

1866

timeout = notifychangeproperty(

1867

dbus.UInt64, "Timeout",

1868

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

1310

1869

extended_timeout = notifychangeproperty(

1311

1870

dbus.UInt64, "ExtendedTimeout",

1312

type_func = timedelta_to_milliseconds)

1313

interval = notifychangeproperty(dbus.UInt64,

1314

"Interval",

1315

type_func =

1316

timedelta_to_milliseconds)

1871

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

1872

interval = notifychangeproperty(

1873

dbus.UInt64, "Interval",

1874

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

1317

1875

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

1318

1876

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

1877

invalidate_only=True)

1878

1319

1879

del notifychangeproperty

1320

1880

1321

1881

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

1322

1882

try:

1323

1883

self.remove_from_connection()

1326

1886

if hasattr(DBusObjectWithProperties, "__del__"):

1327

1887

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

1328

1888

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

1329

1330

def checker_callback(self, pid, condition, command,

1331

*args, **kwargs):

1332

self.checker_callback_tag = None

1333

self.checker = None

1334

if os.WIFEXITED(condition):

1335

exitstatus = os.WEXITSTATUS(condition)

1889

1890

def checker_callback(self, source, condition,

1891

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

1892

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

1893

connection, command, *args,

1894

**kwargs)

1895

exitstatus = self.last_checker_status

1896

if exitstatus >= 0:

1336

1897

# Emit D-Bus signal

1337

1898

self.CheckerCompleted(dbus.Int16(exitstatus),

1338

dbus.Int64(condition),

1899

# This is specific to GNU libC

1900

dbus.Int64(exitstatus << 8),

1339

1901

dbus.String(command))

1340

1902

else:

1341

1903

# Emit D-Bus signal

1342

1904

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

1343

dbus.Int64(condition),

1905

dbus.Int64(

1906

# This is specific to GNU libC

1907

(exitstatus << 8)

1908

| self.last_checker_signal),

1344

1909

dbus.String(command))

1345

1346

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

1347

*args, **kwargs)

1348

1910

return ret

1911

1349

1912

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

1350

old_checker = self.checker

1351

if self.checker is not None:

1352

old_checker_pid = self.checker.pid

1353

else:

1354

old_checker_pid = None

1913

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

1355

1914

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

1356

1915

# Only if new checker process was started

1357

1916

if (self.checker is not None

1359

1918

# Emit D-Bus signal

1360

1919

self.CheckerStarted(self.current_checker_command)

1361

1920

return r

1362

1921

1363

1922

def _reset_approved(self):

1364

1923

self.approved = None

1365

1924

return False

1366

1925

1367

1926

def approve(self, value=True):

1368

1927

self.approved = value

1369

gobject.timeout_add(timedelta_to_milliseconds

1370

(self.approval_duration),

1371

self._reset_approved)

1928

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

1929

* 1000), self._reset_approved)

1372

1930

self.send_changedstate()

1373

1374

## D-Bus methods, signals & properties

1375

_interface = "se.recompile.Mandos.Client"

1376

1377

## Interfaces

1378

1379

@dbus_interface_annotations(_interface)

1380

def _foo(self):

1381

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

1382

"false"}

1383

1384

## Signals

1385

1931

1932

# D-Bus methods, signals & properties

1933

1934

# Interfaces

1935

1936

# Signals

1937

1386

1938

# CheckerCompleted - signal

1387

1939

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

1388

1940

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

1389

1941

"D-Bus signal"

1390

1942

pass

1391

1943

1392

1944

# CheckerStarted - signal

1393

1945

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

1394

1946

def CheckerStarted(self, command):

1395

1947

"D-Bus signal"

1396

1948

pass

1397

1949

1398

1950

# PropertyChanged - signal

1951

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

1399

1952

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

1400

1953

def PropertyChanged(self, property, value):

1401

1954

"D-Bus signal"

1402

1955

pass

1403

1956

1404

1957

# GotSecret - signal

1405

1958

@dbus.service.signal(_interface)

1406

1959

def GotSecret(self):

1409

1962

server to mandos-client

1410

1963

"""

1411

1964

pass

1412

1965

1413

1966

# Rejected - signal

1414

1967

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

1415

1968

def Rejected(self, reason):

1416

1969

"D-Bus signal"

1417

1970

pass

1418

1971

1419

1972

# NeedApproval - signal

1420

1973

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

1421

1974

def NeedApproval(self, timeout, default):

1422

1975

"D-Bus signal"

1423

1976

return self.need_approval()

1424

1425

## Methods

1426

1977

1978

# Methods

1979

1427

1980

# Approve - method

1428

1981

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

1429

1982

def Approve(self, value):

1430

1983

self.approve(value)

1431

1984

1432

1985

# CheckedOK - method

1433

1986

@dbus.service.method(_interface)

1434

1987

def CheckedOK(self):

1435

1988

self.checked_ok()

1436

1989

1437

1990

# Enable - method

1991

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

1438

1992

@dbus.service.method(_interface)

1439

1993

def Enable(self):

1440

1994

"D-Bus method"

1441

1995

self.enable()

1442

1996

1443

1997

# StartChecker - method

1998

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

1444

1999

@dbus.service.method(_interface)

1445

2000

def StartChecker(self):

1446

2001

"D-Bus method"

1447

2002

self.start_checker()

1448

2003

1449

2004

# Disable - method

2005

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

1450

2006

@dbus.service.method(_interface)

1451

2007

def Disable(self):

1452

2008

"D-Bus method"

1453

2009

self.disable()

1454

2010

1455

2011

# StopChecker - method

2012

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

1456

2013

@dbus.service.method(_interface)

1457

2014

def StopChecker(self):

1458

2015

self.stop_checker()

1459

1460

## Properties

1461

2016

2017

# Properties

2018

1462

2019

# ApprovalPending - property

1463

2020

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

1464

2021

def ApprovalPending_dbus_property(self):

1465

2022

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

1466

2023

1467

2024

# ApprovedByDefault - property

1468

@dbus_service_property(_interface, signature="b",

2025

@dbus_service_property(_interface,

2026

signature="b",

1469

2027

access="readwrite")

1470

2028

def ApprovedByDefault_dbus_property(self, value=None):

1471

2029

if value is None: # get

1472

2030

return dbus.Boolean(self.approved_by_default)

1473

2031

self.approved_by_default = bool(value)

1474

2032

1475

2033

# ApprovalDelay - property

1476

@dbus_service_property(_interface, signature="t",

2034

@dbus_service_property(_interface,

2035

signature="t",

1477

2036

access="readwrite")

1478

2037

def ApprovalDelay_dbus_property(self, value=None):

1479

2038

if value is None: # get

1480

return dbus.UInt64(self.approval_delay_milliseconds())

2039

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

2040

* 1000)

1481

2041

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

1482

2042

1483

2043

# ApprovalDuration - property

1484

@dbus_service_property(_interface, signature="t",

2044

@dbus_service_property(_interface,

2045

signature="t",

1485

2046

access="readwrite")

1486

2047

def ApprovalDuration_dbus_property(self, value=None):

1487

2048

if value is None: # get

1488

return dbus.UInt64(timedelta_to_milliseconds(

1489

self.approval_duration))

2049

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

2050

* 1000)

1490

2051

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

1491

2052

1492

2053

# Name - property

2054

@dbus_annotations(

2055

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

1493

2056

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

1494

2057

def Name_dbus_property(self):

1495

2058

return dbus.String(self.name)

1496

2059

2060

# KeyID - property

2061

@dbus_annotations(

2062

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

2063

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

2064

def KeyID_dbus_property(self):

2065

return dbus.String(self.key_id)

2066

1497

2067

# Fingerprint - property

2068

@dbus_annotations(

2069

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

1498

2070

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

1499

2071

def Fingerprint_dbus_property(self):

1500

2072

return dbus.String(self.fingerprint)

1501

2073

1502

2074

# Host - property

1503

@dbus_service_property(_interface, signature="s",

2075

@dbus_service_property(_interface,

2076

signature="s",

1504

2077

access="readwrite")

1505

2078

def Host_dbus_property(self, value=None):

1506

2079

if value is None: # get

1507

2080

return dbus.String(self.host)

1508

self.host = unicode(value)

1509

2081

self.host = str(value)

2082

1510

2083

# Created - property

2084

@dbus_annotations(

2085

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

1511

2086

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

1512

2087

def Created_dbus_property(self):

1513

2088

return datetime_to_dbus(self.created)

1514

2089

1515

2090

# LastEnabled - property

1516

2091

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

1517

2092

def LastEnabled_dbus_property(self):

1518

2093

return datetime_to_dbus(self.last_enabled)

1519

2094

1520

2095

# Enabled - property

1521

@dbus_service_property(_interface, signature="b",

2096

@dbus_service_property(_interface,

2097

signature="b",

1522

2098

access="readwrite")

1523

2099

def Enabled_dbus_property(self, value=None):

1524

2100

if value is None: # get

1527

2103

self.enable()

1528

2104

else:

1529

2105

self.disable()

1530

2106

1531

2107

# LastCheckedOK - property

1532

@dbus_service_property(_interface, signature="s",

2108

@dbus_service_property(_interface,

2109

signature="s",

1533

2110

access="readwrite")

1534

2111

def LastCheckedOK_dbus_property(self, value=None):

1535

2112

if value is not None:

1536

2113

self.checked_ok()

1537

2114

return

1538

2115

return datetime_to_dbus(self.last_checked_ok)

1539

2116

1540

2117

# LastCheckerStatus - property

1541

@dbus_service_property(_interface, signature="n",

1542

access="read")

2118

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

1543

2119

def LastCheckerStatus_dbus_property(self):

1544

2120

return dbus.Int16(self.last_checker_status)

1545

2121

1546

2122

# Expires - property

1547

2123

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

1548

2124

def Expires_dbus_property(self):

1549

2125

return datetime_to_dbus(self.expires)

1550

2126

1551

2127

# LastApprovalRequest - property

1552

2128

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

1553

2129

def LastApprovalRequest_dbus_property(self):

1554

2130

return datetime_to_dbus(self.last_approval_request)

1555

2131

1556

2132

# Timeout - property

1557

@dbus_service_property(_interface, signature="t",

2133

@dbus_service_property(_interface,

2134

signature="t",

1558

2135

access="readwrite")

1559

2136

def Timeout_dbus_property(self, value=None):

1560

2137

if value is None: # get

1561

return dbus.UInt64(self.timeout_milliseconds())

2138

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

1562

2139

old_timeout = self.timeout

1563

2140

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

1564

2141

# Reschedule disabling

1572

2149

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

1573

2150

is None):

1574

2151

return

1575

gobject.source_remove(self.disable_initiator_tag)

1576

self.disable_initiator_tag = (

1577

gobject.timeout_add(

1578

timedelta_to_milliseconds(self.expires - now),

1579

self.disable))

1580

2152

GLib.source_remove(self.disable_initiator_tag)

2153

self.disable_initiator_tag = GLib.timeout_add(

2154

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

2155

self.disable)

2156

1581

2157

# ExtendedTimeout - property

1582

@dbus_service_property(_interface, signature="t",

2158

@dbus_service_property(_interface,

2159

signature="t",

1583

2160

access="readwrite")

1584

2161

def ExtendedTimeout_dbus_property(self, value=None):

1585

2162

if value is None: # get

1586

return dbus.UInt64(self.extended_timeout_milliseconds())

2163

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

2164

* 1000)

1587

2165

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

1588

2166

1589

2167

# Interval - property

1590

@dbus_service_property(_interface, signature="t",

2168

@dbus_service_property(_interface,

2169

signature="t",

1591

2170

access="readwrite")

1592

2171

def Interval_dbus_property(self, value=None):

1593

2172

if value is None: # get

1594

return dbus.UInt64(self.interval_milliseconds())

2173

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

1595

2174

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

1596

2175

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

1597

2176

return

1598

2177

if self.enabled:

1599

2178

# Reschedule checker run

1600

gobject.source_remove(self.checker_initiator_tag)

1601

self.checker_initiator_tag = (gobject.timeout_add

1602

(value, self.start_checker))

1603

self.start_checker() # Start one now, too

1604

2179

GLib.source_remove(self.checker_initiator_tag)

2180

self.checker_initiator_tag = GLib.timeout_add(

2181

value, self.start_checker)

2182

self.start_checker() # Start one now, too

2183

1605

2184

# Checker - property

1606

@dbus_service_property(_interface, signature="s",

2185

@dbus_service_property(_interface,

2186

signature="s",

1607

2187

access="readwrite")

1608

2188

def Checker_dbus_property(self, value=None):

1609

2189

if value is None: # get

1610

2190

return dbus.String(self.checker_command)

1611

self.checker_command = unicode(value)

1612

2191

self.checker_command = str(value)

2192

1613

2193

# CheckerRunning - property

1614

@dbus_service_property(_interface, signature="b",

2194

@dbus_service_property(_interface,

2195

signature="b",

1615

2196

access="readwrite")

1616

2197

def CheckerRunning_dbus_property(self, value=None):

1617

2198

if value is None: # get

1620

2201

self.start_checker()

1621

2202

else:

1622

2203

self.stop_checker()

1623

2204

1624

2205

# ObjectPath - property

2206

@dbus_annotations(

2207

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

2208

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

1625

2209

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

1626

2210

def ObjectPath_dbus_property(self):

1627

return self.dbus_object_path # is already a dbus.ObjectPath

1628

2211

return self.dbus_object_path # is already a dbus.ObjectPath

2212

1629

2213

# Secret = property

1630

@dbus_service_property(_interface, signature="ay",

1631

access="write", byte_arrays=True)

2214

@dbus_annotations(

2215

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

2216

"invalidates"})

2217

@dbus_service_property(_interface,

2218

signature="ay",

2219

access="write",

2220

byte_arrays=True)

1632

2221

def Secret_dbus_property(self, value):

1633

self.secret = str(value)

1634

2222

self.secret = bytes(value)

2223

1635

2224

del _interface

1636

2225

1637

2226

1638

class ProxyClient(object):

1639

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

2227

class ProxyClient:

2228

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

1640

2229

self._pipe = child_pipe

1641

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

2230

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

1642

2231

if not self._pipe.recv():

1643

raise KeyError()

1644

2232

raise KeyError(key_id or fpr)

2233

1645

2234

def __getattribute__(self, name):

1646

2235

if name == '_pipe':

1647

2236

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

1650

2239

if data[0] == 'data':

1651

2240

return data[1]

1652

2241

if data[0] == 'function':

2242

1653

2243

def func(*args, **kwargs):

1654

2244

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

1655

2245

return self._pipe.recv()[1]

2246

1656

2247

return func

1657

2248

1658

2249

def __setattr__(self, name, value):

1659

2250

if name == '_pipe':

1660

2251

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

1663

2254

1664

2255

class ClientHandler(socketserver.BaseRequestHandler, object):

1665

2256

"""A class to handle client connections.

1666

2257

1667

2258

Instantiated once for each connection to handle it.

1668

2259

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

1669

2260

1670

2261

def handle(self):

1671

2262

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

1672

2263

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

1673

unicode(self.client_address))

2264

str(self.client_address))

1674

2265

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

1675

2266

self.server.child_pipe.fileno())

1676

1677

session = (gnutls.connection

1678

.ClientSession(self.request,

1679

gnutls.connection

1680

.X509Credentials()))

1681

1682

# Note: gnutls.connection.X509Credentials is really a

1683

# generic GnuTLS certificate credentials object so long as

1684

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

1685

# here despite using OpenPGP certificates.

1686

1687

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

1688

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

1689

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

1690

# "+DHE-DSS"))

2267

2268

session = gnutls.ClientSession(self.request)

2269

2270

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

2271

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

2272

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

2273

# "+DHE-DSS"))

1691

2274

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

1692

2275

priority = self.server.gnutls_priority

1693

2276

if priority is None:

1694

2277

priority = "NORMAL"

1695

(gnutls.library.functions

1696

.gnutls_priority_set_direct(session._c_object,

1697

priority, None))

1698

2278

gnutls.priority_set_direct(session._c_object,

2279

priority.encode("utf-8"),

2280

None)

2281

1699

2282

# Start communication using the Mandos protocol

1700

2283

# Get protocol number

1701

2284

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

1702

2285

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

1703

2286

try:

1704

2287

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

1705

raise RuntimeError

2288

raise RuntimeError(line)

1706

2289

except (ValueError, IndexError, RuntimeError) as error:

1707

2290

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

1708

2291

return

1709

2292

1710

2293

# Start GnuTLS connection

1711

2294

try:

1712

2295

session.handshake()

1713

except gnutls.errors.GNUTLSError as error:

2296

except gnutls.Error as error:

1714

2297

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

1715

2298

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

1716

2299

# established. Just abandon the request.

1717

2300

return

1718

2301

logger.debug("Handshake succeeded")

1719

2302

1720

2303

approval_required = False

1721

2304

try:

1722

try:

1723

fpr = self.fingerprint(self.peer_certificate

1724

(session))

1725

except (TypeError,

1726

gnutls.errors.GNUTLSError) as error:

1727

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

1728

return

1729

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

1730

1731

try:

1732

client = ProxyClient(child_pipe, fpr,

2305

if gnutls.has_rawpk:

2306

fpr = b""

2307

try:

2308

key_id = self.key_id(

2309

self.peer_certificate(session))

2310

except (TypeError, gnutls.Error) as error:

2311

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

2312

return

2313

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

2314

2315

else:

2316

key_id = b""

2317

try:

2318

fpr = self.fingerprint(

2319

self.peer_certificate(session))

2320

except (TypeError, gnutls.Error) as error:

2321

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

2322

return

2323

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

2324

2325

try:

2326

client = ProxyClient(child_pipe, key_id, fpr,

1733

2327

self.client_address)

1734

2328

except KeyError:

1735

2329

return

1736

2330

1737

2331

if client.approval_delay:

1738

2332

delay = client.approval_delay

1739

2333

client.approvals_pending += 1

1740

2334

approval_required = True

1741

2335

1742

2336

while True:

1743

2337

if not client.enabled:

1744

2338

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

1745

client.name)

2339

client.name)

1746

2340

if self.server.use_dbus:

1747

2341

# Emit D-Bus signal

1748

2342

client.Rejected("Disabled")

1749

2343

return

1750

2344

1751

2345

if client.approved or not client.approval_delay:

1752

#We are approved or approval is disabled

2346

# We are approved or approval is disabled

1753

2347

break

1754

2348

elif client.approved is None:

1755

2349

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

1757

2351

if self.server.use_dbus:

1758

2352

# Emit D-Bus signal

1759

2353

client.NeedApproval(

1760

client.approval_delay_milliseconds(),

1761

client.approved_by_default)

2354

client.approval_delay.total_seconds()

2355

* 1000, client.approved_by_default)

1762

2356

else:

1763

2357

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

1764

2358

client.name)

1766

2360

# Emit D-Bus signal

1767

2361

client.Rejected("Denied")

1768

2362

return

1769

1770

#wait until timeout or approved

2363

2364

# wait until timeout or approved

1771

2365

time = datetime.datetime.now()

1772

2366

client.changedstate.acquire()

1773

client.changedstate.wait(

1774

float(timedelta_to_milliseconds(delay)

1775

/ 1000))

2367

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

1776

2368

client.changedstate.release()

1777

2369

time2 = datetime.datetime.now()

1778

2370

if (time2 - time) >= delay:

1788

2380

break

1789

2381

else:

1790

2382

delay -= time2 - time

1791

1792

sent_size = 0

1793

while sent_size < len(client.secret):

1794

try:

1795

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

1796

except gnutls.errors.GNUTLSError as error:

1797

logger.warning("gnutls send failed",

1798

exc_info=error)

1799

return

1800

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

1801

sent, len(client.secret)

1802

- (sent_size + sent))

1803

sent_size += sent

1804

2383

2384

try:

2385

session.send(client.secret)

2386

except gnutls.Error as error:

2387

logger.warning("gnutls send failed",

2388

exc_info=error)

2389

return

2390

1805

2391

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

1806

2392

# bump the timeout using extended_timeout

1807

2393

client.bump_timeout(client.extended_timeout)

1808

2394

if self.server.use_dbus:

1809

2395

# Emit D-Bus signal

1810

2396

client.GotSecret()

1811

2397

1812

2398

finally:

1813

2399

if approval_required:

1814

2400

client.approvals_pending -= 1

1815

2401

try:

1816

2402

session.bye()

1817

except gnutls.errors.GNUTLSError as error:

2403

except gnutls.Error as error:

1818

2404

logger.warning("GnuTLS bye failed",

1819

2405

exc_info=error)

1820

2406

1821

2407

@staticmethod

1822

2408

def peer_certificate(session):

1823

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

1824

# If not an OpenPGP certificate...

1825

if (gnutls.library.functions

1826

.gnutls_certificate_type_get(session._c_object)

1827

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1828

# ...do the normal thing

1829

return session.peer_certificate

2409

"Return the peer's certificate as a bytestring"

2410

try:

2411

cert_type = gnutls.certificate_type_get2(session._c_object,

2412

gnutls.CTYPE_PEERS)

2413

except AttributeError:

2414

cert_type = gnutls.certificate_type_get(session._c_object)

2415

if gnutls.has_rawpk:

2416

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2417

else:

2418

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2419

# If not a valid certificate type...

2420

if cert_type not in valid_cert_types:

2421

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

2422

valid_cert_types)

2423

# ...return invalid data

2424

return b""

1830

2425

list_size = ctypes.c_uint(1)

1831

cert_list = (gnutls.library.functions

1832

.gnutls_certificate_get_peers

2426

cert_list = (gnutls.certificate_get_peers

1833

2427

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

1834

2428

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

1835

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

1836

" certificate")

2429

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

1837

2430

if list_size.value == 0:

1838

2431

return None

1839

2432

cert = cert_list[0]

1840

2433

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

1841

2434

2435

@staticmethod

2436

def key_id(certificate):

2437

"Convert a certificate bytestring to a hexdigit key ID"

2438

# New GnuTLS "datum" with the public key

2439

datum = gnutls.datum_t(

2440

ctypes.cast(ctypes.c_char_p(certificate),

2441

ctypes.POINTER(ctypes.c_ubyte)),

2442

ctypes.c_uint(len(certificate)))

2443

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

2444

# New empty GnuTLS certificate

2445

pubkey = gnutls.pubkey_t()

2446

gnutls.pubkey_init(ctypes.byref(pubkey))

2447

# Import the raw public key into the certificate

2448

gnutls.pubkey_import(pubkey,

2449

ctypes.byref(datum),

2450

gnutls.X509_FMT_DER)

2451

# New buffer for the key ID

2452

buf = ctypes.create_string_buffer(32)

2453

buf_len = ctypes.c_size_t(len(buf))

2454

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

2455

gnutls.pubkey_get_key_id(pubkey,

2456

gnutls.KEYID_USE_SHA256,

2457

ctypes.cast(ctypes.byref(buf),

2458

ctypes.POINTER(ctypes.c_ubyte)),

2459

ctypes.byref(buf_len))

2460

# Deinit the certificate

2461

gnutls.pubkey_deinit(pubkey)

2462

2463

# Convert the buffer to a Python bytestring

2464

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

2465

# Convert the bytestring to hexadecimal notation

2466

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

2467

return hex_key_id

2468

1842

2469

@staticmethod

1843

2470

def fingerprint(openpgp):

1844

2471

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1845

2472

# New GnuTLS "datum" with the OpenPGP public key

1846

datum = (gnutls.library.types

1847

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

1848

ctypes.POINTER

1849

(ctypes.c_ubyte)),

1850

ctypes.c_uint(len(openpgp))))

2473

datum = gnutls.datum_t(

2474

ctypes.cast(ctypes.c_char_p(openpgp),

2475

ctypes.POINTER(ctypes.c_ubyte)),

2476

ctypes.c_uint(len(openpgp)))

1851

2477

# New empty GnuTLS certificate

1852

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1853

(gnutls.library.functions

1854

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2478

crt = gnutls.openpgp_crt_t()

2479

gnutls.openpgp_crt_init(ctypes.byref(crt))

1855

2480

# Import the OpenPGP public key into the certificate

1856

(gnutls.library.functions

1857

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

1858

gnutls.library.constants

1859

.GNUTLS_OPENPGP_FMT_RAW))

2481

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

2482

gnutls.OPENPGP_FMT_RAW)

1860

2483

# Verify the self signature in the key

1861

2484

crtverify = ctypes.c_uint()

1862

(gnutls.library.functions

1863

.gnutls_openpgp_crt_verify_self(crt, 0,

1864

ctypes.byref(crtverify)))

2485

gnutls.openpgp_crt_verify_self(crt, 0,

2486

ctypes.byref(crtverify))

1865

2487

if crtverify.value != 0:

1866

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1867

raise (gnutls.errors.CertificateSecurityError

1868

("Verify failed"))

2488

gnutls.openpgp_crt_deinit(crt)

2489

raise gnutls.CertificateSecurityError(code

2490

=crtverify.value)

1869

2491

# New buffer for the fingerprint

1870

2492

buf = ctypes.create_string_buffer(20)

1871

2493

buf_len = ctypes.c_size_t()

1872

2494

# Get the fingerprint from the certificate into the buffer

1873

(gnutls.library.functions

1874

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

1875

ctypes.byref(buf_len)))

2495

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

2496

ctypes.byref(buf_len))

1876

2497

# Deinit the certificate

1877

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2498

gnutls.openpgp_crt_deinit(crt)

1878

2499

# Convert the buffer to a Python bytestring

1879

2500

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

1880

2501

# Convert the bytestring to hexadecimal notation

1882

2503

return hex_fpr

1883

2504

1884

2505

1885

class MultiprocessingMixIn(object):

2506

class MultiprocessingMixIn:

1886

2507

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

2508

1887

2509

def sub_process_main(self, request, address):

1888

2510

try:

1889

2511

self.finish_request(request, address)

1890

2512

except Exception:

1891

2513

self.handle_error(request, address)

1892

2514

self.close_request(request)

1893

2515

1894

2516

def process_request(self, request, address):

1895

2517

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

1896

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

1897

args = (request, address))

2518

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

2519

args=(request, address))

1898

2520

proc.start()

1899

2521

return proc

1900

2522

1901

2523

1902

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2524

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

1903

2525

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

2526

1904

2527

def process_request(self, request, client_address):

1905

2528

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

1906

2529

1907

2530

This function creates a new pipe in self.pipe

1908

2531

"""

1909

2532

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1910

2533

1911

2534

proc = MultiprocessingMixIn.process_request(self, request,

1912

2535

client_address)

1913

2536

self.child_pipe.close()

1914

2537

self.add_pipe(parent_pipe, proc)

1915

2538

1916

2539

def add_pipe(self, parent_pipe, proc):

1917

2540

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

1918

raise NotImplementedError

2541

raise NotImplementedError()

1919

2542

1920

2543

1921

2544

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1922

socketserver.TCPServer, object):

2545

socketserver.TCPServer):

1923

2546

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

1924

2547

1925

2548

Attributes:

1926

2549

enabled: Boolean; whether this server is activated yet

1927

2550

interface: None or a network interface name (string)

1928

2551

use_ipv6: Boolean; to use IPv6 or not

1929

2552

"""

2553

1930

2554

def __init__(self, server_address, RequestHandlerClass,

1931

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

2555

interface=None,

2556

use_ipv6=True,

2557

socketfd=None):

1932

2558

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

1933

2559

creating a new one with socket.socket().

1934

2560

"""

1940

2566

self.socketfd = socketfd

1941

2567

# Save the original socket.socket() function

1942

2568

self.socket_socket = socket.socket

2569

1943

2570

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

1944

#

2571

#

1945

2572

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

1946

2573

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

1947

2574

# patching socket.socket.)

1948

#

2575

#

1949

2576

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

1950

2577

@functools.wraps(socket.socket)

1951

2578

def socket_wrapper(*args, **kwargs):

1963

2590

# socket_wrapper(), if socketfd was set.

1964

2591

socketserver.TCPServer.__init__(self, server_address,

1965

2592

RequestHandlerClass)

1966

2593

1967

2594

def server_bind(self):

1968

2595

"""This overrides the normal server_bind() function

1969

2596

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

1970

2597

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

2598

global SO_BINDTODEVICE

1971

2599

if self.interface is not None:

1972

2600

if SO_BINDTODEVICE is None:

1973

logger.error("SO_BINDTODEVICE does not exist;"

1974

" cannot bind to interface %s",

1975

self.interface)

1976

else:

1977

try:

1978

self.socket.setsockopt(socket.SOL_SOCKET,

1979

SO_BINDTODEVICE,

1980

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

1981

except socket.error as error:

1982

if error.errno == errno.EPERM:

1983

logger.error("No permission to bind to"

1984

" interface %s", self.interface)

1985

elif error.errno == errno.ENOPROTOOPT:

1986

logger.error("SO_BINDTODEVICE not available;"

1987

" cannot bind to interface %s",

1988

self.interface)

1989

elif error.errno == errno.ENODEV:

1990

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

1991

" cannot bind", self.interface)

1992

else:

1993

raise

2601

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

2602

# common enough.

2603

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

2604

SO_BINDTODEVICE = 25

2605

try:

2606

self.socket.setsockopt(

2607

socket.SOL_SOCKET, SO_BINDTODEVICE,

2608

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

2609

except socket.error as error:

2610

if error.errno == errno.EPERM:

2611

logger.error("No permission to bind to"

2612

" interface %s", self.interface)

2613

elif error.errno == errno.ENOPROTOOPT:

2614

logger.error("SO_BINDTODEVICE not available;"

2615

" cannot bind to interface %s",

2616

self.interface)

2617

elif error.errno == errno.ENODEV:

2618

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

2619

" cannot bind", self.interface)

2620

else:

2621

raise

1994

2622

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

1995

2623

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

2624

if self.server_address[1]:

2625

self.allow_reuse_address = True

1996

2626

if not self.server_address[0]:

1997

2627

if self.address_family == socket.AF_INET6:

1998

any_address = "::" # in6addr_any

2628

any_address = "::" # in6addr_any

1999

2629

else:

2000

any_address = "0.0.0.0" # INADDR_ANY

2630

any_address = "0.0.0.0" # INADDR_ANY

2001

2631

self.server_address = (any_address,

2002

2632

self.server_address[1])

2003

2633

elif not self.server_address[1]:

2004

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

2005

0)

2634

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

2006

2635

# if self.interface:

2007

2636

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

2008

2637

# 0, # port

2014

2643

2015

2644

class MandosServer(IPv6_TCPServer):

2016

2645

"""Mandos server.

2017

2646

2018

2647

Attributes:

2019

2648

clients: set of Client objects

2020

2649

gnutls_priority GnuTLS priority string

2021

2650

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

2022

2023

Assumes a gobject.MainLoop event loop.

2651

2652

Assumes a GLib.MainLoop event loop.

2024

2653

"""

2654

2025

2655

def __init__(self, server_address, RequestHandlerClass,

2026

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

2027

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

2656

interface=None,

2657

use_ipv6=True,

2658

clients=None,

2659

gnutls_priority=None,

2660

use_dbus=True,

2661

socketfd=None):

2028

2662

self.enabled = False

2029

2663

self.clients = clients

2030

2664

if self.clients is None:

2033

2667

self.gnutls_priority = gnutls_priority

2034

2668

IPv6_TCPServer.__init__(self, server_address,

2035

2669

RequestHandlerClass,

2036

interface = interface,

2037

use_ipv6 = use_ipv6,

2038

socketfd = socketfd)

2670

interface=interface,

2671

use_ipv6=use_ipv6,

2672

socketfd=socketfd)

2673

2039

2674

def server_activate(self):

2040

2675

if self.enabled:

2041

2676

return socketserver.TCPServer.server_activate(self)

2042

2677

2043

2678

def enable(self):

2044

2679

self.enabled = True

2045

2680

2046

2681

def add_pipe(self, parent_pipe, proc):

2047

2682

# Call "handle_ipc" for both data and EOF events

2048

gobject.io_add_watch(parent_pipe.fileno(),

2049

gobject.IO_IN | gobject.IO_HUP,

2050

functools.partial(self.handle_ipc,

2051

parent_pipe =

2052

parent_pipe,

2053

proc = proc))

2054

2055

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

2056

proc = None, client_object=None):

2683

GLib.io_add_watch(

2684

GLib.IOChannel.unix_new(parent_pipe.fileno()),

2685

GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,

2686

functools.partial(self.handle_ipc,

2687

parent_pipe=parent_pipe,

2688

proc=proc))

2689

2690

def handle_ipc(self, source, condition,

2691

parent_pipe=None,

2692

proc=None,

2693

client_object=None):

2057

2694

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

2058

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

2695

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

2059

2696

# Wait for other process to exit

2060

2697

proc.join()

2061

2698

return False

2062

2699

2063

2700

# Read a request from the child

2064

2701

request = parent_pipe.recv()

2065

2702

command = request[0]

2066

2703

2067

2704

if command == 'init':

2068

fpr = request[1]

2069

address = request[2]

2070

2071

for c in self.clients.itervalues():

2072

if c.fingerprint == fpr:

2705

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

2706

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

2707

address = request[3]

2708

2709

for c in self.clients.values():

2710

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2711

continue

2712

if key_id and c.key_id == key_id:

2713

client = c

2714

break

2715

if fpr and c.fingerprint == fpr:

2073

2716

client = c

2074

2717

break

2075

2718

else:

2076

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

2077

"dress: %s", fpr, address)

2719

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

2720

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

2078

2721

if self.use_dbus:

2079

2722

# Emit D-Bus signal

2080

mandos_dbus_service.ClientNotFound(fpr,

2723

mandos_dbus_service.ClientNotFound(key_id or fpr,

2081

2724

address[0])

2082

2725

parent_pipe.send(False)

2083

2726

return False

2084

2085

gobject.io_add_watch(parent_pipe.fileno(),

2086

gobject.IO_IN | gobject.IO_HUP,

2087

functools.partial(self.handle_ipc,

2088

parent_pipe =

2089

parent_pipe,

2090

proc = proc,

2091

client_object =

2092

client))

2727

2728

GLib.io_add_watch(

2729

GLib.IOChannel.unix_new(parent_pipe.fileno()),

2730

GLib.PRIORITY_DEFAULT, GLib.IO_IN | GLib.IO_HUP,

2731

functools.partial(self.handle_ipc,

2732

parent_pipe=parent_pipe,

2733

proc=proc,

2734

client_object=client))

2093

2735

parent_pipe.send(True)

2094

2736

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

2095

2737

# same fileno

2098

2740

funcname = request[1]

2099

2741

args = request[2]

2100

2742

kwargs = request[3]

2101

2743

2102

2744

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

2103

2745

funcname)(*args,

2104

**kwargs)))

2105

2746

**kwargs)))

2747

2106

2748

if command == 'getattr':

2107

2749

attrname = request[1]

2108

if callable(client_object.__getattribute__(attrname)):

2109

parent_pipe.send(('function',))

2750

if isinstance(client_object.__getattribute__(attrname),

2751

collections.Callable):

2752

parent_pipe.send(('function', ))

2110

2753

else:

2111

parent_pipe.send(('data', client_object

2112

.__getattribute__(attrname)))

2113

2754

parent_pipe.send((

2755

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

2756

2114

2757

if command == 'setattr':

2115

2758

attrname = request[1]

2116

2759

value = request[2]

2117

2760

setattr(client_object, attrname, value)

2118

2761

2119

2762

return True

2120

2763

2121

2764

2122

2765

def rfc3339_duration_to_delta(duration):

2123

2766

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

2124

2125

>>> rfc3339_duration_to_delta("P7D")

2126

datetime.timedelta(7)

2127

>>> rfc3339_duration_to_delta("PT60S")

2128

datetime.timedelta(0, 60)

2129

>>> rfc3339_duration_to_delta("PT60M")

2130

datetime.timedelta(0, 3600)

2131

>>> rfc3339_duration_to_delta("PT24H")

2132

datetime.timedelta(1)

2133

>>> rfc3339_duration_to_delta("P1W")

2134

datetime.timedelta(7)

2135

>>> rfc3339_duration_to_delta("PT5M30S")

2136

datetime.timedelta(0, 330)

2137

>>> rfc3339_duration_to_delta("P1DT3M20S")

2138

datetime.timedelta(1, 200)

2767

2768

>>> rfc3339_duration_to_delta("P7D") == datetime.timedelta(7)

2769

True

2770

>>> rfc3339_duration_to_delta("PT60S") == datetime.timedelta(0, 60)

2771

True

2772

>>> rfc3339_duration_to_delta("PT60M") == datetime.timedelta(0, 3600)

2773

True

2774

>>> rfc3339_duration_to_delta("PT24H") == datetime.timedelta(1)

2775

True

2776

>>> rfc3339_duration_to_delta("P1W") == datetime.timedelta(7)

2777

True

2778

>>> rfc3339_duration_to_delta("PT5M30S") == datetime.timedelta(0, 330)

2779

True

2780

>>> rfc3339_duration_to_delta("P1DT3M20S") == datetime.timedelta(1, 200)

2781

True

2139

2782

"""

2140

2783

2141

2784

# Parsing an RFC 3339 duration with regular expressions is not

2142

2785

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

2143

2786

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

2144

2787

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

2145

2788

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

2146

2789

# avoid excessive use of external libraries.

2147

2790

2148

2791

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

2149

Token = collections.namedtuple("Token",

2150

("regexp", # To match token; if

2151

# "value" is not None,

2152

# must have a "group"

2153

# containing digits

2154

"value", # datetime.timedelta or

2155

# None

2156

"followers")) # Tokens valid after

2157

# this token

2792

Token = collections.namedtuple("Token", (

2793

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

2794

# a "group" containing digits

2795

"value", # datetime.timedelta or None

2796

"followers")) # Tokens valid after this token

2158

2797

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

2159

2798

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

2160

2799

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

2161

2800

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

2162

2801

datetime.timedelta(seconds=1),

2163

frozenset((token_end,)))

2802

frozenset((token_end, )))

2164

2803

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

2165

2804

datetime.timedelta(minutes=1),

2166

2805

frozenset((token_second, token_end)))

2182

2821

frozenset((token_month, token_end)))

2183

2822

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

2184

2823

datetime.timedelta(weeks=1),

2185

frozenset((token_end,)))

2824

frozenset((token_end, )))

2186

2825

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

2187

2826

frozenset((token_year, token_month,

2188

2827

token_day, token_time,

2189

token_week))),

2190

# Define starting values

2191

value = datetime.timedelta() # Value so far

2828

token_week)))

2829

# Define starting values:

2830

# Value so far

2831

value = datetime.timedelta()

2192

2832

found_token = None

2193

followers = frozenset(token_duration,) # Following valid tokens

2194

s = duration # String left to parse

2833

# Following valid tokens

2834

followers = frozenset((token_duration, ))

2835

# String left to parse

2836

s = duration

2195

2837

# Loop until end token is found

2196

2838

while found_token is not token_end:

2197

2839

# Search for any currently valid tokens

2213

2855

break

2214

2856

else:

2215

2857

# No currently valid tokens were found

2216

raise ValueError("Invalid RFC 3339 duration")

2858

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

2859

.format(duration))

2217

2860

# End token found

2218

2861

return value

2219

2862

2220

2863

2221

2864

def string_to_delta(interval):

2222

2865

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

2223

2224

>>> string_to_delta('7d')

2225

datetime.timedelta(7)

2226

>>> string_to_delta('60s')

2227

datetime.timedelta(0, 60)

2228

>>> string_to_delta('60m')

2229

datetime.timedelta(0, 3600)

2230

>>> string_to_delta('24h')

2231

datetime.timedelta(1)

2232

>>> string_to_delta('1w')

2233

datetime.timedelta(7)

2234

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

2235

datetime.timedelta(0, 330)

2866

2867

>>> string_to_delta('7d') == datetime.timedelta(7)

2868

True

2869

>>> string_to_delta('60s') == datetime.timedelta(0, 60)

2870

True

2871

>>> string_to_delta('60m') == datetime.timedelta(0, 3600)

2872

True

2873

>>> string_to_delta('24h') == datetime.timedelta(1)

2874

True

2875

>>> string_to_delta('1w') == datetime.timedelta(7)

2876

True

2877

>>> string_to_delta('5m 30s') == datetime.timedelta(0, 330)

2878

True

2236

2879

"""

2237

2880

2238

2881

try:

2239

2882

return rfc3339_duration_to_delta(interval)

2240

2883

except ValueError:

2241

2884

pass

2242

2885

2243

2886

timevalue = datetime.timedelta(0)

2244

2887

for s in interval.split():

2245

2888

try:

2246

suffix = unicode(s[-1])

2889

suffix = s[-1]

2247

2890

value = int(s[:-1])

2248

2891

if suffix == "d":

2249

2892

delta = datetime.timedelta(value)

2256

2899

elif suffix == "w":

2257

2900

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

2258

2901

else:

2259

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

2260

.format(suffix))

2261

except (ValueError, IndexError) as e:

2902

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

2903

except IndexError as e:

2262

2904

raise ValueError(*(e.args))

2263

2905

timevalue += delta

2264

2906

return timevalue

2265

2907

2266

2908

2267

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

2909

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

2268

2910

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

2269

2911

2270

2912

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

2271

2913

if os.fork():

2272

2914

sys.exit()

2280

2922

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

2281

2923

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

2282

2924

raise OSError(errno.ENODEV,

2283

"{0} not a character device"

2925

"{} not a character device"

2284

2926

.format(os.devnull))

2285

2927

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

2286

2928

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

2290

2932

2291

2933

2292

2934

def main():

2293

2935

2294

2936

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

2295

2937

# Parsing of options, both command line and config file

2296

2938

2297

2939

parser = argparse.ArgumentParser()

2298

2940

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

2299

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

2941

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

2300

2942

help="show version number and exit")

2301

2943

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

2302

2944

help="Bind to interface IF")

2335

2977

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

2336

2978

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

2337

2979

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

2338

2980

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

2981

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

2982

default=None)

2983

2339

2984

options = parser.parse_args()

2340

2341

if options.check:

2342

import doctest

2343

doctest.testmod()

2344

sys.exit()

2345

2985

2346

2986

# Default values for config file for server-global settings

2347

server_defaults = { "interface": "",

2348

"address": "",

2349

"port": "",

2350

"debug": "False",

2351

"priority":

2352

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

2353

"servicename": "Mandos",

2354

"use_dbus": "True",

2355

"use_ipv6": "True",

2356

"debuglevel": "",

2357

"restore": "True",

2358

"socket": "",

2359

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

2360

"foreground": "False",

2361

}

2362

2987

if gnutls.has_rawpk:

2988

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

2989

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

2990

else:

2991

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

2992

":+SIGN-DSA-SHA256")

2993

server_defaults = {"interface": "",

2994

"address": "",

2995

"port": "",

2996

"debug": "False",

2997

"priority": priority,

2998

"servicename": "Mandos",

2999

"use_dbus": "True",

3000

"use_ipv6": "True",

3001

"debuglevel": "",

3002

"restore": "True",

3003

"socket": "",

3004

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

3005

"foreground": "False",

3006

"zeroconf": "True",

3007

}

3008

del priority

3009

2363

3010

# Parse config file for server-global settings

2364

server_config = configparser.SafeConfigParser(server_defaults)

3011

server_config = configparser.ConfigParser(server_defaults)

2365

3012

del server_defaults

2366

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

2367

"mandos.conf"))

2368

# Convert the SafeConfigParser object to a dict

3013

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

3014

# Convert the ConfigParser object to a dict

2369

3015

server_settings = server_config.defaults()

2370

3016

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

2371

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

3017

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

3018

"foreground", "zeroconf"):

2372

3019

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

2373

3020

option)

2374

3021

if server_settings["port"]:

2384

3031

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

2385

3032

["socket"])

2386

3033

del server_config

2387

3034

2388

3035

# Override the settings from the config file with command line

2389

3036

# options, if set.

2390

3037

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

2391

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

2392

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

2393

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

3038

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

3039

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

3040

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

2394

3041

value = getattr(options, option)

2395

3042

if value is not None:

2396

3043

server_settings[option] = value

2397

3044

del options

2398

3045

# Force all strings to be unicode

2399

3046

for option in server_settings.keys():

2400

if type(server_settings[option]) is str:

2401

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

3047

if isinstance(server_settings[option], bytes):

3048

server_settings[option] = (server_settings[option]

3049

.decode("utf-8"))

2402

3050

# Force all boolean options to be boolean

2403

3051

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

2404

"foreground"):

3052

"foreground", "zeroconf"):

2405

3053

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

2406

3054

# Debug implies foreground

2407

3055

if server_settings["debug"]:

2408

3056

server_settings["foreground"] = True

2409

3057

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

2410

3058

2411

3059

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

2412

3060

3061

if (not server_settings["zeroconf"]

3062

and not (server_settings["port"]

3063

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

3064

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

3065

2413

3066

# For convenience

2414

3067

debug = server_settings["debug"]

2415

3068

debuglevel = server_settings["debuglevel"]

2418

3071

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

2419

3072

stored_state_file)

2420

3073

foreground = server_settings["foreground"]

2421

3074

zeroconf = server_settings["zeroconf"]

3075

2422

3076

if debug:

2423

3077

initlogger(debug, logging.DEBUG)

2424

3078

else:

2427

3081

else:

2428

3082

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

2429

3083

initlogger(debug, level)

2430

3084

2431

3085

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

2432

syslogger.setFormatter(logging.Formatter

2433

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

2434

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

2435

.format(server_settings

2436

["servicename"])))

2437

3086

syslogger.setFormatter(

3087

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

3088

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

3089

server_settings["servicename"])))

3090

2438

3091

# Parse config file with clients

2439

client_config = configparser.SafeConfigParser(Client

2440

.client_defaults)

3092

client_config = configparser.ConfigParser(Client.client_defaults)

2441

3093

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

2442

3094

"clients.conf"))

2443

3095

2444

3096

global mandos_dbus_service

2445

3097

mandos_dbus_service = None

2446

2447

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

2448

server_settings["port"]),

2449

ClientHandler,

2450

interface=(server_settings["interface"]

2451

or None),

2452

use_ipv6=use_ipv6,

2453

gnutls_priority=

2454

server_settings["priority"],

2455

use_dbus=use_dbus,

2456

socketfd=(server_settings["socket"]

2457

or None))

3098

3099

socketfd = None

3100

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

3101

socketfd = server_settings["socket"]

3102

tcp_server = MandosServer(

3103

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

3104

ClientHandler,

3105

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

3106

use_ipv6=use_ipv6,

3107

gnutls_priority=server_settings["priority"],

3108

use_dbus=use_dbus,

3109

socketfd=socketfd)

2458

3110

if not foreground:

2459

3111

pidfilename = "/run/mandos.pid"

2460

3112

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

2461

3113

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

2462

3114

pidfile = None

2463

3115

try:

2464

pidfile = open(pidfilename, "w")

3116

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

2465

3117

except IOError as e:

2466

3118

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

2467

3119

exc_info=e)

2468

2469

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

3120

3121

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

3122

("mandos", "mandos"),

3123

("nobody", "nogroup")):

2470

3124

try:

2471

3125

uid = pwd.getpwnam(name).pw_uid

2472

gid = pwd.getpwnam(name).pw_gid

3126

gid = pwd.getpwnam(group).pw_gid

2473

3127

break

2474

3128

except KeyError:

2475

3129

continue

2479

3133

try:

2480

3134

os.setgid(gid)

2481

3135

os.setuid(uid)

3136

if debug:

3137

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

3138

gid))

2482

3139

except OSError as error:

3140

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

3141

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

2483

3142

if error.errno != errno.EPERM:

2484

raise error

2485

3143

raise

3144

2486

3145

if debug:

2487

3146

# Enable all possible GnuTLS debugging

2488

3147

2489

3148

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

2490

3149

# - GnuTLS manual

2491

gnutls.library.functions.gnutls_global_set_log_level(11)

2492

2493

@gnutls.library.types.gnutls_log_func

3150

gnutls.global_set_log_level(11)

3151

3152

@gnutls.log_func

2494

3153

def debug_gnutls(level, string):

2495

3154

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

2496

2497

(gnutls.library.functions

2498

.gnutls_global_set_log_function(debug_gnutls))

2499

3155

3156

gnutls.global_set_log_function(debug_gnutls)

3157

2500

3158

# Redirect stdin so all checkers get /dev/null

2501

3159

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

2502

3160

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

2503

3161

if null > 2:

2504

3162

os.close(null)

2505

3163

2506

3164

# Need to fork before connecting to D-Bus

2507

3165

if not foreground:

2508

3166

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

2509

3167

daemon()

2510

2511

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

2512

# need to inform gobject that threads will be used.

2513

gobject.threads_init()

2514

3168

3169

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

3170

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

3171

# need to inform GLib that threads will be used.

3172

GLib.threads_init()

3173

2515

3174

global main_loop

2516

3175

# From the Avahi example code

2517

3176

DBusGMainLoop(set_as_default=True)

2518

main_loop = gobject.MainLoop()

3177

main_loop = GLib.MainLoop()

2519

3178

bus = dbus.SystemBus()

2520

3179

# End of Avahi example code

2521

3180

if use_dbus:

2522

3181

try:

2523

3182

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

2524

bus, do_not_queue=True)

2525

old_bus_name = (dbus.service.BusName

2526

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

2527

do_not_queue=True))

2528

except dbus.exceptions.NameExistsException as e:

3183

bus,

3184

do_not_queue=True)

3185

old_bus_name = dbus.service.BusName(

3186

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

3187

do_not_queue=True)

3188

except dbus.exceptions.DBusException as e:

2529

3189

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

2530

3190

use_dbus = False

2531

3191

server_settings["use_dbus"] = False

2532

3192

tcp_server.use_dbus = False

2533

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2534

service = AvahiServiceToSyslog(name =

2535

server_settings["servicename"],

2536

servicetype = "_mandos._tcp",

2537

protocol = protocol, bus = bus)

2538

if server_settings["interface"]:

2539

service.interface = (if_nametoindex

2540

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

2541

3193

if zeroconf:

3194

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3195

service = AvahiServiceToSyslog(

3196

name=server_settings["servicename"],

3197

servicetype="_mandos._tcp",

3198

protocol=protocol,

3199

bus=bus)

3200

if server_settings["interface"]:

3201

service.interface = if_nametoindex(

3202

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

3203

2542

3204

global multiprocessing_manager

2543

3205

multiprocessing_manager = multiprocessing.Manager()

2544

3206

2545

3207

client_class = Client

2546

3208

if use_dbus:

2547

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

2548

3209

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

3210

2549

3211

client_settings = Client.config_parser(client_config)

2550

3212

old_client_settings = {}

2551

3213

clients_data = {}

2552

3214

2553

3215

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

2554

3216

global wnull

2555

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

3217

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

2556

3218

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

2557

3219

# mode

2558

3220

if debug or not foreground:

2559

3221

wnull.close()

2560

3222

2561

3223

# Get client data and settings from last running state.

2562

3224

if server_settings["restore"]:

2563

3225

try:

2564

3226

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

2565

clients_data, old_client_settings = (pickle.load

2566

(stored_state))

3227

if sys.version_info.major == 2:

3228

clients_data, old_client_settings = pickle.load(

3229

stored_state)

3230

else:

3231

bytes_clients_data, bytes_old_client_settings = (

3232

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

3233

# Fix bytes to strings

3234

# clients_data

3235

# .keys()

3236

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

3237

if isinstance(key, bytes)

3238

else key): value

3239

for key, value in

3240

bytes_clients_data.items()}

3241

del bytes_clients_data

3242

for key in clients_data:

3243

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

3244

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

3245

for k, v in

3246

clients_data[key].items()}

3247

clients_data[key] = value

3248

# .client_structure

3249

value["client_structure"] = [

3250

(s.decode("utf-8")

3251

if isinstance(s, bytes)

3252

else s) for s in

3253

value["client_structure"]]

3254

# .name, .host, and .checker_command

3255

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

3256

if isinstance(value[k], bytes):

3257

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

3258

if "key_id" not in value:

3259

value["key_id"] = ""

3260

elif "fingerprint" not in value:

3261

value["fingerprint"] = ""

3262

# old_client_settings

3263

# .keys()

3264

old_client_settings = {

3265

(key.decode("utf-8")

3266

if isinstance(key, bytes)

3267

else key): value

3268

for key, value in

3269

bytes_old_client_settings.items()}

3270

del bytes_old_client_settings

3271

# .host and .checker_command

3272

for value in old_client_settings.values():

3273

for attribute in ("host", "checker_command"):

3274

if isinstance(value[attribute], bytes):

3275

value[attribute] = (value[attribute]

3276

.decode("utf-8"))

2567

3277

os.remove(stored_state_path)

2568

3278

except IOError as e:

2569

3279

if e.errno == errno.ENOENT:

2570

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

2571

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

3280

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

3281

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

2572

3282

else:

2573

3283

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

2574

3284

exc_info=e)

2575

3285

raise

2576

3286

except EOFError as e:

2577

3287

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

2578

"EOFError:", exc_info=e)

2579

3288

"EOFError:",

3289

exc_info=e)

3290

2580

3291

with PGPEngine() as pgp:

2581

for client_name, client in clients_data.iteritems():

3292

for client_name, client in clients_data.items():

2582

3293

# Skip removed clients

2583

3294

if client_name not in client_settings:

2584

3295

continue

2585

3296

2586

3297

# Decide which value to use after restoring saved state.

2587

3298

# We have three different values: Old config file,

2588

3299

# new config file, and saved state.

2593

3304

# For each value in new config, check if it

2594

3305

# differs from the old config value (Except for

2595

3306

# the "secret" attribute)

2596

if (name != "secret" and

2597

value != old_client_settings[client_name]

2598

[name]):

3307

if (name != "secret"

3308

and (value !=

3309

old_client_settings[client_name][name])):

2599

3310

client[name] = value

2600

3311

except KeyError:

2601

3312

pass

2602

3313

2603

3314

# Clients who has passed its expire date can still be

2604

# enabled if its last checker was successful. Clients

3315

# enabled if its last checker was successful. A Client

2605

3316

# whose checker succeeded before we stored its state is

2606

3317

# assumed to have successfully run all checkers during

2607

3318

# downtime.

2609

3320

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

2610

3321

if not client["last_checked_ok"]:

2611

3322

logger.warning(

2612

"disabling client {0} - Client never "

2613

"performed a successful checker"

2614

.format(client_name))

3323

"disabling client {} - Client never "

3324

"performed a successful checker".format(

3325

client_name))

2615

3326

client["enabled"] = False

2616

3327

elif client["last_checker_status"] != 0:

2617

3328

logger.warning(

2618

"disabling client {0} - Client "

2619

"last checker failed with error code {1}"

2620

.format(client_name,

2621

client["last_checker_status"]))

3329

"disabling client {} - Client last"

3330

" checker failed with error code"

3331

" {}".format(

3332

client_name,

3333

client["last_checker_status"]))

2622

3334

client["enabled"] = False

2623

3335

else:

2624

client["expires"] = (datetime.datetime

2625

.utcnow()

2626

+ client["timeout"])

3336

client["expires"] = (

3337

datetime.datetime.utcnow()

3338

+ client["timeout"])

2627

3339

logger.debug("Last checker succeeded,"

2628

" keeping {0} enabled"

2629

.format(client_name))

3340

" keeping {} enabled".format(

3341

client_name))

2630

3342

try:

2631

client["secret"] = (

2632

pgp.decrypt(client["encrypted_secret"],

2633

client_settings[client_name]

2634

["secret"]))

3343

client["secret"] = pgp.decrypt(

3344

client["encrypted_secret"],

3345

client_settings[client_name]["secret"])

2635

3346

except PGPError:

2636

3347

# If decryption fails, we use secret from new settings

2637

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

2638

.format(client_name))

2639

client["secret"] = (

2640

client_settings[client_name]["secret"])

2641

3348

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

3349

client_name))

3350

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

3351

["secret"])

3352

2642

3353

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

2643

3354

for client_name in (set(old_client_settings)

2644

3355

- set(client_settings)):

2646

3357

for client_name in (set(client_settings)

2647

3358

- set(old_client_settings)):

2648

3359

clients_data[client_name] = client_settings[client_name]

2649

3360

2650

3361

# Create all client objects

2651

for client_name, client in clients_data.iteritems():

3362

for client_name, client in clients_data.items():

2652

3363

tcp_server.clients[client_name] = client_class(

2653

name = client_name, settings = client,

2654

server_settings = server_settings)

2655

3364

name=client_name,

3365

settings=client,

3366

server_settings=server_settings)

3367

2656

3368

if not tcp_server.clients:

2657

3369

logger.warning("No clients defined")

2658

3370

2659

3371

if not foreground:

2660

3372

if pidfile is not None:

3373

pid = os.getpid()

2661

3374

try:

2662

3375

with pidfile:

2663

pid = os.getpid()

2664

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

3376

print(pid, file=pidfile)

2665

3377

except IOError:

2666

3378

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

2667

3379

pidfilename, pid)

2668

3380

del pidfile

2669

3381

del pidfilename

2670

2671

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

2672

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

2673

3382

3383

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

3384

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3385

lambda: main_loop.quit() and False)

3386

2674

3387

if use_dbus:

2675

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

2676

"se.bsnet.fukt.Mandos"})

2677

class MandosDBusService(DBusObjectWithProperties):

3388

3389

@alternate_dbus_interfaces(

3390

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

3391

class MandosDBusService(DBusObjectWithObjectManager):

2678

3392

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

3393

2679

3394

def __init__(self):

2680

3395

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

3396

2681

3397

_interface = "se.recompile.Mandos"

2682

2683

@dbus_interface_annotations(_interface)

2684

def _foo(self):

2685

return { "org.freedesktop.DBus.Property"

2686

".EmitsChangedSignal":

2687

"false"}

2688

3398

2689

3399

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

2690

3400

def ClientAdded(self, objpath):

2691

3401

"D-Bus signal"

2692

3402

pass

2693

3403

2694

3404

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

2695

def ClientNotFound(self, fingerprint, address):

3405

def ClientNotFound(self, key_id, address):

2696

3406

"D-Bus signal"

2697

3407

pass

2698

3408

3409

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

3410

"true"})

2699

3411

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

2700

3412

def ClientRemoved(self, objpath, name):

2701

3413

"D-Bus signal"

2702

3414

pass

2703

3415

3416

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

3417

"true"})

2704

3418

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

2705

3419

def GetAllClients(self):

2706

3420

"D-Bus method"

2707

return dbus.Array(c.dbus_object_path

2708

for c in

2709

tcp_server.clients.itervalues())

2710

3421

return dbus.Array(c.dbus_object_path for c in

3422

tcp_server.clients.values())

3423

3424

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

3425

"true"})

2711

3426

@dbus.service.method(_interface,

2712

3427

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

2713

3428

def GetAllClientsWithProperties(self):

2714

3429

"D-Bus method"

2715

3430

return dbus.Dictionary(

2716

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

2717

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

3431

{c.dbus_object_path: c.GetAll(

3432

"se.recompile.Mandos.Client")

3433

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

2718

3434

signature="oa{sv}")

2719

3435

2720

3436

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

2721

3437

def RemoveClient(self, object_path):

2722

3438

"D-Bus method"

2723

for c in tcp_server.clients.itervalues():

3439

for c in tcp_server.clients.values():

2724

3440

if c.dbus_object_path == object_path:

2725

3441

del tcp_server.clients[c.name]

2726

3442

c.remove_from_connection()

2727

# Don't signal anything except ClientRemoved

3443

# Don't signal the disabling

2728

3444

c.disable(quiet=True)

2729

# Emit D-Bus signal

2730

self.ClientRemoved(object_path, c.name)

3445

# Emit D-Bus signal for removal

3446

self.client_removed_signal(c)

2731

3447

return

2732

3448

raise KeyError(object_path)

2733

3449

2734

3450

del _interface

2735

3451

3452

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3453

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

3454

def GetManagedObjects(self):

3455

"""D-Bus method"""

3456

return dbus.Dictionary(

3457

{client.dbus_object_path:

3458

dbus.Dictionary(

3459

{interface: client.GetAll(interface)

3460

for interface in

3461

client._get_all_interface_names()})

3462

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

3463

3464

def client_added_signal(self, client):

3465

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

3466

if use_dbus:

3467

# New standard signal

3468

self.InterfacesAdded(

3469

client.dbus_object_path,

3470

dbus.Dictionary(

3471

{interface: client.GetAll(interface)

3472

for interface in

3473

client._get_all_interface_names()}))

3474

# Old signal

3475

self.ClientAdded(client.dbus_object_path)

3476

3477

def client_removed_signal(self, client):

3478

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

3479

if use_dbus:

3480

# New standard signal

3481

self.InterfacesRemoved(

3482

client.dbus_object_path,

3483

client._get_all_interface_names())

3484

# Old signal

3485

self.ClientRemoved(client.dbus_object_path,

3486

client.name)

3487

2736

3488

mandos_dbus_service = MandosDBusService()

2737

3489

3490

# Save modules to variables to exempt the modules from being

3491

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

3492

mp = multiprocessing

3493

wn = wnull

3494

2738

3495

def cleanup():

2739

3496

"Cleanup function; run on exit"

2740

service.cleanup()

2741

2742

multiprocessing.active_children()

2743

wnull.close()

3497

if zeroconf:

3498

service.cleanup()

3499

3500

mp.active_children()

3501

wn.close()

2744

3502

if not (tcp_server.clients or client_settings):

2745

3503

return

2746

3504

2747

3505

# Store client before exiting. Secrets are encrypted with key

2748

3506

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

2749

3507

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

2750

3508

clients = {}

2751

3509

with PGPEngine() as pgp:

2752

for client in tcp_server.clients.itervalues():

3510

for client in tcp_server.clients.values():

2753

3511

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

2754

3512

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

2755

3513

key)

2756

3514

client_dict = {}

2757

3515

2758

3516

# A list of attributes that can not be pickled

2759

3517

# + secret.

2760

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

2761

"checker", "server_settings"))

2762

for name, typ in (inspect.getmembers

2763

(dbus.service.Object)):

3518

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

3519

"checker", "server_settings"}

3520

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

3521

.Object):

2764

3522

exclude.add(name)

2765

3523

2766

3524

client_dict["encrypted_secret"] = (client

2767

3525

.encrypted_secret)

2768

3526

for attr in client.client_structure:

2769

3527

if attr not in exclude:

2770

3528

client_dict[attr] = getattr(client, attr)

2771

3529

2772

3530

clients[client.name] = client_dict

2773

3531

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

2774

3532

2775

3533

try:

2776

with (tempfile.NamedTemporaryFile

2777

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

2778

dir=os.path.dirname(stored_state_path),

2779

delete=False)) as stored_state:

2780

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

2781

tempname=stored_state.name

3534

with tempfile.NamedTemporaryFile(

3535

mode='wb',

3536

suffix=".pickle",

3537

prefix='clients-',

3538

dir=os.path.dirname(stored_state_path),

3539

delete=False) as stored_state:

3540

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

3541

protocol=2)

3542

tempname = stored_state.name

2782

3543

os.rename(tempname, stored_state_path)

2783

3544

except (IOError, OSError) as e:

2784

3545

if not debug:

2787

3548

except NameError:

2788

3549

pass

2789

3550

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

2790

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

3551

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

2791

3552

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

2792

3553

else:

2793

3554

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

2794

3555

exc_info=e)

2795

raise e

2796

3556

raise

3557

2797

3558

# Delete all clients, and settings from config

2798

3559

while tcp_server.clients:

2799

3560

name, client = tcp_server.clients.popitem()

2800

3561

if use_dbus:

2801

3562

client.remove_from_connection()

2802

# Don't signal anything except ClientRemoved

3563

# Don't signal the disabling

2803

3564

client.disable(quiet=True)

3565

# Emit D-Bus signal for removal

2804

3566

if use_dbus:

2805

# Emit D-Bus signal

2806

mandos_dbus_service.ClientRemoved(client

2807

.dbus_object_path,

2808

client.name)

3567

mandos_dbus_service.client_removed_signal(client)

2809

3568

client_settings.clear()

2810

3569

2811

3570

atexit.register(cleanup)

2812

2813

for client in tcp_server.clients.itervalues():

3571

3572

for client in tcp_server.clients.values():

2814

3573

if use_dbus:

2815

# Emit D-Bus signal

2816

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3574

# Emit D-Bus signal for adding

3575

mandos_dbus_service.client_added_signal(client)

2817

3576

# Need to initiate checking of clients

2818

3577

if client.enabled:

2819

3578

client.init_checker()

2820

3579

2821

3580

tcp_server.enable()

2822

3581

tcp_server.server_activate()

2823

3582

2824

3583

# Find out what port we got

2825

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

3584

if zeroconf:

3585

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

2826

3586

if use_ipv6:

2827

3587

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

2828

3588

" flowinfo %d, scope_id %d",

2830

3590

else: # IPv4

2831

3591

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

2832

3592

*tcp_server.socket.getsockname())

2833

2834

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

2835

3593

3594

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

3595

2836

3596

try:

2837

# From the Avahi example code

2838

try:

2839

service.activate()

2840

except dbus.exceptions.DBusException as error:

2841

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

2842

cleanup()

2843

sys.exit(1)

2844

# End of Avahi example code

2845

2846

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

2847

lambda *args, **kwargs:

2848

(tcp_server.handle_request

2849

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

2850

3597

if zeroconf:

3598

# From the Avahi example code

3599

try:

3600

service.activate()

3601

except dbus.exceptions.DBusException as error:

3602

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

3603

cleanup()

3604

sys.exit(1)

3605

# End of Avahi example code

3606

3607

GLib.io_add_watch(

3608

GLib.IOChannel.unix_new(tcp_server.fileno()),

3609

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

3610

lambda *args, **kwargs: (tcp_server.handle_request

3611

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

3612

2851

3613

logger.debug("Starting main loop")

2852

3614

main_loop.run()

2853

3615

except AvahiError as error:

2862

3624

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

2863

3625

cleanup()

2864

3626

3627

3628

def should_only_run_tests():

3629

parser = argparse.ArgumentParser(add_help=False)

3630

parser.add_argument("--check", action='store_true')

3631

args, unknown_args = parser.parse_known_args()

3632

run_tests = args.check

3633

if run_tests:

3634

# Remove --check argument from sys.argv

3635

sys.argv[1:] = unknown_args

3636

return run_tests

3637

3638

# Add all tests from doctest strings

3639

def load_tests(loader, tests, none):

3640

import doctest

3641

tests.addTests(doctest.DocTestSuite())

3642

return tests

3643

2865

3644

if __name__ == '__main__':

2866

main()

3645

try:

3646

if should_only_run_tests():

3647

# Call using ./mandos --check [--verbose]

3648

unittest.main()

3649

else:

3650

main()

3651

finally:

3652

logging.shutdown()