/mandos/release : revision 237.7.748

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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 = "1.6.3"

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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',

208

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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289

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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:

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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:

694

pass

695

except OSError as error:

696

if error.errno != errno.ECHILD:

697

raise

698

else:

699

if pid:

700

logger.warning("Checker was a zombie")

701

gobject.source_remove(self.checker_callback_tag)

702

self.checker_callback(pid, status,

703

self.current_checker_command)

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

704

1117

# Start a new checker if needed

705

1118

if self.checker is None:

706

1119

# Escape attributes for the shell

707

escaped_attrs = dict(

708

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

709

for attr in

710

self.runtime_expansions)

1120

escaped_attrs = {

1121

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

1122

for attr in self.runtime_expansions}

711

1123

try:

712

1124

command = self.checker_command % escaped_attrs

713

1125

except TypeError as error:

714

1126

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

715

self.checker_command, exc_info=error)

716

return True # Try again later

1127

self.checker_command,

1128

exc_info=error)

1129

return True # Try again later

717

1130

self.current_checker_command = command

718

try:

719

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

720

command, self.name)

721

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

722

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

723

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

724

# always replaced by /dev/null.)

725

# The exception is when not debugging but nevertheless

726

# running in the foreground; use the previously

727

# created wnull.

728

popen_args = {}

729

if (not self.server_settings["debug"]

730

and self.server_settings["foreground"]):

731

popen_args.update({"stdout": wnull,

732

"stderr": wnull })

733

self.checker = subprocess.Popen(command,

734

close_fds=True,

735

shell=True, cwd="/",

736

**popen_args)

737

except OSError as error:

738

logger.error("Failed to start subprocess",

739

exc_info=error)

740

return True

741

self.checker_callback_tag = (gobject.child_watch_add

742

(self.checker.pid,

743

self.checker_callback,

744

data=command))

745

# The checker may have completed before the gobject

746

# watch was added. Check for this.

747

try:

748

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

749

except OSError as error:

750

if error.errno == errno.ECHILD:

751

# This should never happen

752

logger.error("Child process vanished",

753

exc_info=error)

754

return True

755

raise

756

if pid:

757

gobject.source_remove(self.checker_callback_tag)

758

self.checker_callback(pid, status, command)

759

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

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

760

1158

return True

761

1159

762

1160

def stop_checker(self):

763

1161

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

764

1162

if self.checker_callback_tag:

765

gobject.source_remove(self.checker_callback_tag)

1163

GLib.source_remove(self.checker_callback_tag)

766

1164

self.checker_callback_tag = None

767

1165

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

768

1166

return

769

1167

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

770

try:

771

self.checker.terminate()

772

#time.sleep(0.5)

773

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

774

# self.checker.kill()

775

except OSError as error:

776

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

777

raise

1168

self.checker.terminate()

778

1169

self.checker = None

779

1170

780

1171

781

def dbus_service_property(dbus_interface, signature="v",

782

access="readwrite", byte_arrays=False):

1172

def dbus_service_property(dbus_interface,

1173

signature="v",

1174

access="readwrite",

1175

byte_arrays=False):

783

1176

"""Decorators for marking methods of a DBusObjectWithProperties to

784

1177

become properties on the D-Bus.

785

1178

786

1179

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

787

1180

and with one argument by "Set".

788

1181

789

1182

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

790

1183

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

791

1184

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

794

1187

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

795

1188

if byte_arrays and signature != "ay":

796

1189

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

797

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

1190

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

1191

798

1192

def decorator(func):

799

1193

func._dbus_is_property = True

800

1194

func._dbus_interface = dbus_interface

803

1197

func._dbus_name = func.__name__

804

1198

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

805

1199

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

806

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1200

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

807

1201

return func

1202

808

1203

return decorator

809

1204

810

1205

811

1206

def dbus_interface_annotations(dbus_interface):

812

1207

"""Decorator for marking functions returning interface annotations

813

1208

814

1209

Usage:

815

1210

816

1211

@dbus_interface_annotations("org.example.Interface")

817

1212

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

818

1213

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

819

1214

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

820

1215

"false"}

821

1216

"""

1217

822

1218

def decorator(func):

823

1219

func._dbus_is_interface = True

824

1220

func._dbus_interface = dbus_interface

825

1221

func._dbus_name = dbus_interface

826

1222

return func

1223

827

1224

return decorator

828

1225

829

1226

830

1227

def dbus_annotations(annotations):

831

1228

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

832

1229

Usage:

833

1230

1231

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

1232

"org.freedesktop.DBus.Property."

1233

"EmitsChangedSignal": "false"})

834

1234

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

835

1235

access="r")

836

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

837

"org.freedesktop.DBus.Property."

838

"EmitsChangedSignal": "false"})

839

1236

def Property_dbus_property(self):

840

1237

return dbus.Boolean(False)

1238

1239

See also the DBusObjectWithAnnotations class.

841

1240

"""

1241

842

1242

def decorator(func):

843

1243

func._dbus_annotations = annotations

844

1244

return func

1245

845

1246

return decorator

846

1247

847

1248

848

1249

class DBusPropertyException(dbus.exceptions.DBusException):

849

1250

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

850

1251

"""

851

def __unicode__(self):

852

return unicode(str(self))

1252

pass

853

1253

854

1254

855

1255

class DBusPropertyAccessException(DBusPropertyException):

864

1264

pass

865

1265

866

1266

867

class DBusObjectWithProperties(dbus.service.Object):

868

"""A D-Bus object with properties.

869

870

Classes inheriting from this can use the dbus_service_property

871

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

872

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

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.

873

1272

"""

874

1273

875

1274

@staticmethod

876

1275

def _is_dbus_thing(thing):

877

1276

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

878

1277

879

1278

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

880

1279

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

881

1280

"""

882

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

1281

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

883

1282

False)

884

1283

885

1284

def _get_all_dbus_things(self, thing):

886

1285

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

887

1286

"""

888

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

889

name),

1287

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

890

1288

athing.__get__(self))

891

1289

for cls in self.__class__.__mro__

892

1290

for name, athing in

893

inspect.getmembers(cls,

894

self._is_dbus_thing(thing)))

895

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

896

1364

def _get_dbus_property(self, interface_name, property_name):

897

1365

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

898

1366

property with the specified name and interface.

899

1367

"""

900

for cls in self.__class__.__mro__:

901

for name, value in (inspect.getmembers

902

(cls,

903

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")):

904

1371

if (value._dbus_name == property_name

905

1372

and value._dbus_interface == interface_name):

906

1373

return value.__get__(self)

907

1374

908

1375

# No such property

909

raise DBusPropertyNotFound(self.dbus_object_path + ":"

910

+ interface_name + "."

911

+ property_name)

912

913

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

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",

914

1390

out_signature="v")

915

1391

def Get(self, interface_name, property_name):

916

1392

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

922

1398

if not hasattr(value, "variant_level"):

923

1399

return value

924

1400

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

925

1401

926

1402

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

927

1403

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

928

1404

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

935

1411

# signatures other than "ay".

936

1412

if prop._dbus_signature != "ay":

937

1413

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

938

"'ay' signature {0!r}"

1414

"'ay' signature {!r}"

939

1415

.format(prop._dbus_signature))

940

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

941

for byte in value))

1416

value = dbus.ByteArray(bytes(value))

942

1417

prop(value)

943

944

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

1418

1419

@dbus.service.method(dbus.PROPERTIES_IFACE,

1420

in_signature="s",

945

1421

out_signature="a{sv}")

946

1422

def GetAll(self, interface_name):

947

1423

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

948

1424

standard.

949

1425

950

1426

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

951

1427

"""

952

1428

properties = {}

962

1438

if not hasattr(value, "variant_level"):

963

1439

properties[name] = value

964

1440

continue

965

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

966

value.variant_level+1)

1441

properties[name] = type(value)(

1442

value, variant_level=value.variant_level + 1)

967

1443

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

968

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

969

1453

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

970

1454

out_signature="s",

971

1455

path_keyword='object_path',

972

1456

connection_keyword='connection')

973

1457

def Introspect(self, object_path, connection):

974

1458

"""Overloading of standard D-Bus method.

975

1459

976

1460

Inserts property tags and interface annotation tags.

977

1461

"""

978

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

979

connection)

1462

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1463

object_path,

1464

connection)

980

1465

try:

981

1466

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

1467

982

1468

def make_tag(document, name, prop):

983

1469

e = document.createElement("property")

984

1470

e.setAttribute("name", name)

985

1471

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

986

1472

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

987

1473

return e

1474

988

1475

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

989

1476

# Add property tags

990

1477

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

993

1480

if prop._dbus_interface

994

1481

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

995

1482

if_tag.appendChild(tag)

996

# Add annotation tags

997

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

998

for tag in if_tag.getElementsByTagName(typ):

999

annots = dict()

1000

for name, prop in (self.

1001

_get_all_dbus_things(typ)):

1002

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

1003

and prop._dbus_interface

1004

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

1005

annots.update(getattr

1006

(prop,

1007

"_dbus_annotations",

1008

{}))

1009

for name, value in annots.iteritems():

1010

ann_tag = document.createElement(

1011

"annotation")

1012

ann_tag.setAttribute("name", name)

1013

ann_tag.setAttribute("value", value)

1014

tag.appendChild(ann_tag)

1015

# Add interface annotation tags

1016

for annotation, value in dict(

1017

itertools.chain.from_iterable(

1018

annotations().iteritems()

1019

for name, annotations in

1020

self._get_all_dbus_things("interface")

1021

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

1022

)).iteritems():

1023

ann_tag = document.createElement("annotation")

1024

ann_tag.setAttribute("name", annotation)

1025

ann_tag.setAttribute("value", value)

1026

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)

1027

1499

# Add the names to the return values for the

1028

1500

# "org.freedesktop.DBus.Properties" methods

1029

1501

if (if_tag.getAttribute("name")

1048

1520

return xmlstring

1049

1521

1050

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

1051

1594

def datetime_to_dbus(dt, variant_level=0):

1052

1595

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

1053

1596

if dt is None:

1054

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

1055

return dbus.String(dt.isoformat(),

1056

variant_level=variant_level)

1597

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

1598

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

1057

1599

1058

1600

1059

1601

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1061

1603

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

1062

1604

interface names according to the "alt_interface_names" mapping.

1063

1605

Usage:

1064

1606

1065

1607

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

1066

1608

"net.example.AlternateInterface"})

1067

1609

class SampleDBusObject(dbus.service.Object):

1068

1610

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

1069

1611

def SampleDBusMethod():

1070

1612

pass

1071

1613

1072

1614

The above "SampleDBusMethod" on "SampleDBusObject" will be

1073

1615

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

1074

1616

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

1075

1617

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

1076

1618

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

1077

1619

1078

1620

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

1079

1621

(from DBusObjectWithProperties) and interfaces (from the

1080

1622

dbus_interface_annotations decorator).

1081

1623

"""

1624

1082

1625

def wrapper(cls):

1083

1626

for orig_interface_name, alt_interface_name in (

1084

alt_interface_names.iteritems()):

1627

alt_interface_names.items()):

1085

1628

attr = {}

1086

1629

interface_names = set()

1087

1630

# Go though all attributes of the class

1089

1632

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

1090

1633

# with the wrong interface name

1091

1634

if (not hasattr(attribute, "_dbus_interface")

1092

or not attribute._dbus_interface

1093

.startswith(orig_interface_name)):

1635

or not attribute._dbus_interface.startswith(

1636

orig_interface_name)):

1094

1637

continue

1095

1638

# Create an alternate D-Bus interface name based on

1096

1639

# the current name

1097

alt_interface = (attribute._dbus_interface

1098

.replace(orig_interface_name,

1099

alt_interface_name))

1640

alt_interface = attribute._dbus_interface.replace(

1641

orig_interface_name, alt_interface_name)

1100

1642

interface_names.add(alt_interface)

1101

1643

# Is this a D-Bus signal?

1102

1644

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

1103

1645

# Extract the original non-method undecorated

1104

1646

# function by black magic

1105

nonmethod_func = (dict(

1647

if sys.version_info.major == 2:

1648

nonmethod_func = (dict(

1106

1649

zip(attribute.func_code.co_freevars,

1107

attribute.__closure__))["func"]

1108

.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)

1109

1657

# Create a new, but exactly alike, function

1110

1658

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

1111

1659

# with the alternate D-Bus interface name

1112

new_function = (dbus.service.signal

1113

(alt_interface,

1114

attribute._dbus_signature)

1115

(types.FunctionType(

1116

nonmethod_func.func_code,

1117

nonmethod_func.func_globals,

1118

nonmethod_func.func_name,

1119

nonmethod_func.func_defaults,

1120

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))

1121

1664

# Copy annotations, if any

1122

1665

try:

1123

new_function._dbus_annotations = (

1124

dict(attribute._dbus_annotations))

1666

new_function._dbus_annotations = dict(

1667

attribute._dbus_annotations)

1125

1668

except AttributeError:

1126

1669

pass

1670

1127

1671

# Define a creator of a function to call both the

1128

1672

# original and alternate functions, so both the

1129

1673

# original and alternate signals gets sent when

1132

1676

"""This function is a scope container to pass

1133

1677

func1 and func2 to the "call_both" function

1134

1678

outside of its arguments"""

1679

1680

@functools.wraps(func2)

1135

1681

def call_both(*args, **kwargs):

1136

1682

"""This function will emit two D-Bus

1137

1683

signals by calling func1 and func2"""

1138

1684

func1(*args, **kwargs)

1139

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

1140

1692

return call_both

1141

1693

# Create the "call_both" function and add it to

1142

1694

# the class

1147

1699

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

1148

1700

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

1149

1701

# to the class.

1150

attr[attrname] = (dbus.service.method

1151

(alt_interface,

1152

attribute._dbus_in_signature,

1153

attribute._dbus_out_signature)

1154

(types.FunctionType

1155

(attribute.func_code,

1156

attribute.func_globals,

1157

attribute.func_name,

1158

attribute.func_defaults,

1159

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)))

1160

1708

# Copy annotations, if any

1161

1709

try:

1162

attr[attrname]._dbus_annotations = (

1163

dict(attribute._dbus_annotations))

1710

attr[attrname]._dbus_annotations = dict(

1711

attribute._dbus_annotations)

1164

1712

except AttributeError:

1165

1713

pass

1166

1714

# Is this a D-Bus property?

1169

1717

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

1170

1718

# property with the alternate D-Bus interface

1171

1719

# name. Add it to the class.

1172

attr[attrname] = (dbus_service_property

1173

(alt_interface,

1174

attribute._dbus_signature,

1175

attribute._dbus_access,

1176

attribute

1177

._dbus_get_args_options

1178

["byte_arrays"])

1179

(types.FunctionType

1180

(attribute.func_code,

1181

attribute.func_globals,

1182

attribute.func_name,

1183

attribute.func_defaults,

1184

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)))

1185

1726

# Copy annotations, if any

1186

1727

try:

1187

attr[attrname]._dbus_annotations = (

1188

dict(attribute._dbus_annotations))

1728

attr[attrname]._dbus_annotations = dict(

1729

attribute._dbus_annotations)

1189

1730

except AttributeError:

1190

1731

pass

1191

1732

# Is this a D-Bus interface?

1194

1735

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

1195

1736

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

1196

1737

# to the class.

1197

attr[attrname] = (dbus_interface_annotations

1198

(alt_interface)

1199

(types.FunctionType

1200

(attribute.func_code,

1201

attribute.func_globals,

1202

attribute.func_name,

1203

attribute.func_defaults,

1204

attribute.func_closure)))

1738

attr[attrname] = (

1739

dbus_interface_annotations(alt_interface)

1740

(copy_function(attribute)))

1205

1741

if deprecate:

1206

1742

# Deprecate all alternate interfaces

1207

iname="_AlternateDBusNames_interface_annotation{0}"

1743

iname = "_AlternateDBusNames_interface_annotation{}"

1208

1744

for interface_name in interface_names:

1745

1209

1746

@dbus_interface_annotations(interface_name)

1210

1747

def func(self):

1211

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

1212

"true" }

1748

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

1749

"true"}

1213

1750

# Find an unused name

1214

1751

for aname in (iname.format(i)

1215

1752

for i in itertools.count()):

1219

1756

if interface_names:

1220

1757

# Replace the class with a new subclass of it with

1221

1758

# methods, signals, etc. as created above.

1222

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

1223

(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)

1224

1765

return cls

1766

1225

1767

return wrapper

1226

1768

1227

1769

1228

1770

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

1229

"se.bsnet.fukt.Mandos"})

1771

"se.bsnet.fukt.Mandos"})

1230

1772

class ClientDBus(Client, DBusObjectWithProperties):

1231

1773

"""A Client class using D-Bus

1232

1774

1233

1775

Attributes:

1234

1776

dbus_object_path: dbus.ObjectPath

1235

1777

bus: dbus.SystemBus()

1236

1778

"""

1237

1779

1238

1780

runtime_expansions = (Client.runtime_expansions

1239

+ ("dbus_object_path",))

1240

1781

+ ("dbus_object_path", ))

1782

1783

_interface = "se.recompile.Mandos.Client"

1784

1241

1785

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

1242

1243

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

1786

1787

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

1244

1788

self.bus = bus

1245

1789

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

1246

1790

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

1247

1791

# the D-Bus

1248

client_object_name = unicode(self.name).translate(

1792

client_object_name = str(self.name).translate(

1249

1793

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

1250

1794

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

1251

self.dbus_object_path = (dbus.ObjectPath

1252

("/clients/" + client_object_name))

1795

self.dbus_object_path = dbus.ObjectPath(

1796

"/clients/" + client_object_name)

1253

1797

DBusObjectWithProperties.__init__(self, self.bus,

1254

1798

self.dbus_object_path)

1255

1256

def notifychangeproperty(transform_func,

1257

dbus_name, type_func=lambda x: x,

1258

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):

1259

1805

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

1260

1806

its changes to DBus.

1261

1807

1262

1808

transform_fun: Function that takes a value and a variant_level

1263

1809

and transforms it to a D-Bus type.

1264

1810

dbus_name: D-Bus name of the variable

1266

1812

to the D-Bus. Default: no transform

1267

1813

variant_level: D-Bus variant level. Default: 1

1268

1814

"""

1269

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

1815

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

1816

1270

1817

def setter(self, value):

1271

1818

if hasattr(self, "dbus_object_path"):

1272

1819

if (not hasattr(self, attrname) or

1273

1820

type_func(getattr(self, attrname, None))

1274

1821

!= type_func(value)):

1275

dbus_value = transform_func(type_func(value),

1276

variant_level

1277

=variant_level)

1278

self.PropertyChanged(dbus.String(dbus_name),

1279

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())

1280

1837

setattr(self, attrname, value)

1281

1838

1282

1839

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

1283

1840

1284

1841

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1285

1842

approvals_pending = notifychangeproperty(dbus.Boolean,

1286

1843

"ApprovalPending",

1287

type_func = bool)

1844

type_func=bool)

1288

1845

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

1289

1846

last_enabled = notifychangeproperty(datetime_to_dbus,

1290

1847

"LastEnabled")

1291

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

1292

type_func = lambda checker:

1293

checker is not None)

1848

checker = notifychangeproperty(

1849

dbus.Boolean, "CheckerRunning",

1850

type_func=lambda checker: checker is not None)

1294

1851

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1295

1852

"LastCheckedOK")

1296

1853

last_checker_status = notifychangeproperty(dbus.Int16,

1299

1856

datetime_to_dbus, "LastApprovalRequest")

1300

1857

approved_by_default = notifychangeproperty(dbus.Boolean,

1301

1858

"ApprovedByDefault")

1302

approval_delay = notifychangeproperty(dbus.UInt64,

1303

"ApprovalDelay",

1304

type_func =

1305

timedelta_to_milliseconds)

1859

approval_delay = notifychangeproperty(

1860

dbus.UInt64, "ApprovalDelay",

1861

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

1306

1862

approval_duration = notifychangeproperty(

1307

1863

dbus.UInt64, "ApprovalDuration",

1308

type_func = timedelta_to_milliseconds)

1864

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

1309

1865

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

1310

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

1311

type_func =

1312

timedelta_to_milliseconds)

1866

timeout = notifychangeproperty(

1867

dbus.UInt64, "Timeout",

1868

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

1313

1869

extended_timeout = notifychangeproperty(

1314

1870

dbus.UInt64, "ExtendedTimeout",

1315

type_func = timedelta_to_milliseconds)

1316

interval = notifychangeproperty(dbus.UInt64,

1317

"Interval",

1318

type_func =

1319

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)

1320

1875

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

1321

1876

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

1877

invalidate_only=True)

1878

1322

1879

del notifychangeproperty

1323

1880

1324

1881

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

1325

1882

try:

1326

1883

self.remove_from_connection()

1329

1886

if hasattr(DBusObjectWithProperties, "__del__"):

1330

1887

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

1331

1888

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

1332

1333

def checker_callback(self, pid, condition, command,

1334

*args, **kwargs):

1335

self.checker_callback_tag = None

1336

self.checker = None

1337

if os.WIFEXITED(condition):

1338

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:

1339

1897

# Emit D-Bus signal

1340

1898

self.CheckerCompleted(dbus.Int16(exitstatus),

1341

dbus.Int64(condition),

1899

# This is specific to GNU libC

1900

dbus.Int64(exitstatus << 8),

1342

1901

dbus.String(command))

1343

1902

else:

1344

1903

# Emit D-Bus signal

1345

1904

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

1346

dbus.Int64(condition),

1905

dbus.Int64(

1906

# This is specific to GNU libC

1907

(exitstatus << 8)

1908

| self.last_checker_signal),

1347

1909

dbus.String(command))

1348

1349

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

1350

*args, **kwargs)

1351

1910

return ret

1911

1352

1912

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

1353

old_checker = self.checker

1354

if self.checker is not None:

1355

old_checker_pid = self.checker.pid

1356

else:

1357

old_checker_pid = None

1913

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

1358

1914

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

1359

1915

# Only if new checker process was started

1360

1916

if (self.checker is not None

1362

1918

# Emit D-Bus signal

1363

1919

self.CheckerStarted(self.current_checker_command)

1364

1920

return r

1365

1921

1366

1922

def _reset_approved(self):

1367

1923

self.approved = None

1368

1924

return False

1369

1925

1370

1926

def approve(self, value=True):

1371

1927

self.approved = value

1372

gobject.timeout_add(timedelta_to_milliseconds

1373

(self.approval_duration),

1374

self._reset_approved)

1928

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

1929

* 1000), self._reset_approved)

1375

1930

self.send_changedstate()

1376

1377

## D-Bus methods, signals & properties

1378

_interface = "se.recompile.Mandos.Client"

1379

1380

## Interfaces

1381

1382

@dbus_interface_annotations(_interface)

1383

def _foo(self):

1384

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

1385

"false"}

1386

1387

## Signals

1388

1931

1932

# D-Bus methods, signals & properties

1933

1934

# Interfaces

1935

1936

# Signals

1937

1389

1938

# CheckerCompleted - signal

1390

1939

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

1391

1940

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

1392

1941

"D-Bus signal"

1393

1942

pass

1394

1943

1395

1944

# CheckerStarted - signal

1396

1945

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

1397

1946

def CheckerStarted(self, command):

1398

1947

"D-Bus signal"

1399

1948

pass

1400

1949

1401

1950

# PropertyChanged - signal

1951

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

1402

1952

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

1403

1953

def PropertyChanged(self, property, value):

1404

1954

"D-Bus signal"

1405

1955

pass

1406

1956

1407

1957

# GotSecret - signal

1408

1958

@dbus.service.signal(_interface)

1409

1959

def GotSecret(self):

1412

1962

server to mandos-client

1413

1963

"""

1414

1964

pass

1415

1965

1416

1966

# Rejected - signal

1417

1967

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

1418

1968

def Rejected(self, reason):

1419

1969

"D-Bus signal"

1420

1970

pass

1421

1971

1422

1972

# NeedApproval - signal

1423

1973

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

1424

1974

def NeedApproval(self, timeout, default):

1425

1975

"D-Bus signal"

1426

1976

return self.need_approval()

1427

1428

## Methods

1429

1977

1978

# Methods

1979

1430

1980

# Approve - method

1431

1981

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

1432

1982

def Approve(self, value):

1433

1983

self.approve(value)

1434

1984

1435

1985

# CheckedOK - method

1436

1986

@dbus.service.method(_interface)

1437

1987

def CheckedOK(self):

1438

1988

self.checked_ok()

1439

1989

1440

1990

# Enable - method

1991

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

1441

1992

@dbus.service.method(_interface)

1442

1993

def Enable(self):

1443

1994

"D-Bus method"

1444

1995

self.enable()

1445

1996

1446

1997

# StartChecker - method

1998

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

1447

1999

@dbus.service.method(_interface)

1448

2000

def StartChecker(self):

1449

2001

"D-Bus method"

1450

2002

self.start_checker()

1451

2003

1452

2004

# Disable - method

2005

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

1453

2006

@dbus.service.method(_interface)

1454

2007

def Disable(self):

1455

2008

"D-Bus method"

1456

2009

self.disable()

1457

2010

1458

2011

# StopChecker - method

2012

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

1459

2013

@dbus.service.method(_interface)

1460

2014

def StopChecker(self):

1461

2015

self.stop_checker()

1462

1463

## Properties

1464

2016

2017

# Properties

2018

1465

2019

# ApprovalPending - property

1466

2020

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

1467

2021

def ApprovalPending_dbus_property(self):

1468

2022

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

1469

2023

1470

2024

# ApprovedByDefault - property

1471

@dbus_service_property(_interface, signature="b",

2025

@dbus_service_property(_interface,

2026

signature="b",

1472

2027

access="readwrite")

1473

2028

def ApprovedByDefault_dbus_property(self, value=None):

1474

2029

if value is None: # get

1475

2030

return dbus.Boolean(self.approved_by_default)

1476

2031

self.approved_by_default = bool(value)

1477

2032

1478

2033

# ApprovalDelay - property

1479

@dbus_service_property(_interface, signature="t",

2034

@dbus_service_property(_interface,

2035

signature="t",

1480

2036

access="readwrite")

1481

2037

def ApprovalDelay_dbus_property(self, value=None):

1482

2038

if value is None: # get

1483

return dbus.UInt64(self.approval_delay_milliseconds())

2039

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

2040

* 1000)

1484

2041

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

1485

2042

1486

2043

# ApprovalDuration - property

1487

@dbus_service_property(_interface, signature="t",

2044

@dbus_service_property(_interface,

2045

signature="t",

1488

2046

access="readwrite")

1489

2047

def ApprovalDuration_dbus_property(self, value=None):

1490

2048

if value is None: # get

1491

return dbus.UInt64(timedelta_to_milliseconds(

1492

self.approval_duration))

2049

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

2050

* 1000)

1493

2051

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

1494

2052

1495

2053

# Name - property

2054

@dbus_annotations(

2055

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

1496

2056

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

1497

2057

def Name_dbus_property(self):

1498

2058

return dbus.String(self.name)

1499

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

1500

2067

# Fingerprint - property

2068

@dbus_annotations(

2069

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

1501

2070

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

1502

2071

def Fingerprint_dbus_property(self):

1503

2072

return dbus.String(self.fingerprint)

1504

2073

1505

2074

# Host - property

1506

@dbus_service_property(_interface, signature="s",

2075

@dbus_service_property(_interface,

2076

signature="s",

1507

2077

access="readwrite")

1508

2078

def Host_dbus_property(self, value=None):

1509

2079

if value is None: # get

1510

2080

return dbus.String(self.host)

1511

self.host = unicode(value)

1512

2081

self.host = str(value)

2082

1513

2083

# Created - property

2084

@dbus_annotations(

2085

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

1514

2086

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

1515

2087

def Created_dbus_property(self):

1516

2088

return datetime_to_dbus(self.created)

1517

2089

1518

2090

# LastEnabled - property

1519

2091

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

1520

2092

def LastEnabled_dbus_property(self):

1521

2093

return datetime_to_dbus(self.last_enabled)

1522

2094

1523

2095

# Enabled - property

1524

@dbus_service_property(_interface, signature="b",

2096

@dbus_service_property(_interface,

2097

signature="b",

1525

2098

access="readwrite")

1526

2099

def Enabled_dbus_property(self, value=None):

1527

2100

if value is None: # get

1530

2103

self.enable()

1531

2104

else:

1532

2105

self.disable()

1533

2106

1534

2107

# LastCheckedOK - property

1535

@dbus_service_property(_interface, signature="s",

2108

@dbus_service_property(_interface,

2109

signature="s",

1536

2110

access="readwrite")

1537

2111

def LastCheckedOK_dbus_property(self, value=None):

1538

2112

if value is not None:

1539

2113

self.checked_ok()

1540

2114

return

1541

2115

return datetime_to_dbus(self.last_checked_ok)

1542

2116

1543

2117

# LastCheckerStatus - property

1544

@dbus_service_property(_interface, signature="n",

1545

access="read")

2118

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

1546

2119

def LastCheckerStatus_dbus_property(self):

1547

2120

return dbus.Int16(self.last_checker_status)

1548

2121

1549

2122

# Expires - property

1550

2123

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

1551

2124

def Expires_dbus_property(self):

1552

2125

return datetime_to_dbus(self.expires)

1553

2126

1554

2127

# LastApprovalRequest - property

1555

2128

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

1556

2129

def LastApprovalRequest_dbus_property(self):

1557

2130

return datetime_to_dbus(self.last_approval_request)

1558

2131

1559

2132

# Timeout - property

1560

@dbus_service_property(_interface, signature="t",

2133

@dbus_service_property(_interface,

2134

signature="t",

1561

2135

access="readwrite")

1562

2136

def Timeout_dbus_property(self, value=None):

1563

2137

if value is None: # get

1564

return dbus.UInt64(self.timeout_milliseconds())

2138

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

1565

2139

old_timeout = self.timeout

1566

2140

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

1567

2141

# Reschedule disabling

1575

2149

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

1576

2150

is None):

1577

2151

return

1578

gobject.source_remove(self.disable_initiator_tag)

1579

self.disable_initiator_tag = (

1580

gobject.timeout_add(

1581

timedelta_to_milliseconds(self.expires - now),

1582

self.disable))

1583

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

1584

2157

# ExtendedTimeout - property

1585

@dbus_service_property(_interface, signature="t",

2158

@dbus_service_property(_interface,

2159

signature="t",

1586

2160

access="readwrite")

1587

2161

def ExtendedTimeout_dbus_property(self, value=None):

1588

2162

if value is None: # get

1589

return dbus.UInt64(self.extended_timeout_milliseconds())

2163

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

2164

* 1000)

1590

2165

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

1591

2166

1592

2167

# Interval - property

1593

@dbus_service_property(_interface, signature="t",

2168

@dbus_service_property(_interface,

2169

signature="t",

1594

2170

access="readwrite")

1595

2171

def Interval_dbus_property(self, value=None):

1596

2172

if value is None: # get

1597

return dbus.UInt64(self.interval_milliseconds())

2173

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

1598

2174

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

1599

2175

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

1600

2176

return

1601

2177

if self.enabled:

1602

2178

# Reschedule checker run

1603

gobject.source_remove(self.checker_initiator_tag)

1604

self.checker_initiator_tag = (gobject.timeout_add

1605

(value, self.start_checker))

1606

self.start_checker() # Start one now, too

1607

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

1608

2184

# Checker - property

1609

@dbus_service_property(_interface, signature="s",

2185

@dbus_service_property(_interface,

2186

signature="s",

1610

2187

access="readwrite")

1611

2188

def Checker_dbus_property(self, value=None):

1612

2189

if value is None: # get

1613

2190

return dbus.String(self.checker_command)

1614

self.checker_command = unicode(value)

1615

2191

self.checker_command = str(value)

2192

1616

2193

# CheckerRunning - property

1617

@dbus_service_property(_interface, signature="b",

2194

@dbus_service_property(_interface,

2195

signature="b",

1618

2196

access="readwrite")

1619

2197

def CheckerRunning_dbus_property(self, value=None):

1620

2198

if value is None: # get

1623

2201

self.start_checker()

1624

2202

else:

1625

2203

self.stop_checker()

1626

2204

1627

2205

# ObjectPath - property

2206

@dbus_annotations(

2207

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

2208

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

1628

2209

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

1629

2210

def ObjectPath_dbus_property(self):

1630

return self.dbus_object_path # is already a dbus.ObjectPath

1631

2211

return self.dbus_object_path # is already a dbus.ObjectPath

2212

1632

2213

# Secret = property

1633

@dbus_service_property(_interface, signature="ay",

1634

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)

1635

2221

def Secret_dbus_property(self, value):

1636

self.secret = str(value)

1637

2222

self.secret = bytes(value)

2223

1638

2224

del _interface

1639

2225

1640

2226

1641

class ProxyClient(object):

1642

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

2227

class ProxyClient:

2228

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

1643

2229

self._pipe = child_pipe

1644

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

2230

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

1645

2231

if not self._pipe.recv():

1646

raise KeyError()

1647

2232

raise KeyError(key_id or fpr)

2233

1648

2234

def __getattribute__(self, name):

1649

2235

if name == '_pipe':

1650

2236

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

1653

2239

if data[0] == 'data':

1654

2240

return data[1]

1655

2241

if data[0] == 'function':

2242

1656

2243

def func(*args, **kwargs):

1657

2244

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

1658

2245

return self._pipe.recv()[1]

2246

1659

2247

return func

1660

2248

1661

2249

def __setattr__(self, name, value):

1662

2250

if name == '_pipe':

1663

2251

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

1666

2254

1667

2255

class ClientHandler(socketserver.BaseRequestHandler, object):

1668

2256

"""A class to handle client connections.

1669

2257

1670

2258

Instantiated once for each connection to handle it.

1671

2259

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

1672

2260

1673

2261

def handle(self):

1674

2262

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

1675

2263

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

1676

unicode(self.client_address))

2264

str(self.client_address))

1677

2265

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

1678

2266

self.server.child_pipe.fileno())

1679

1680

session = (gnutls.connection

1681

.ClientSession(self.request,

1682

gnutls.connection

1683

.X509Credentials()))

1684

1685

# Note: gnutls.connection.X509Credentials is really a

1686

# generic GnuTLS certificate credentials object so long as

1687

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

1688

# here despite using OpenPGP certificates.

1689

1690

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

1691

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

1692

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

1693

# "+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"))

1694

2274

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

1695

2275

priority = self.server.gnutls_priority

1696

2276

if priority is None:

1697

2277

priority = "NORMAL"

1698

(gnutls.library.functions

1699

.gnutls_priority_set_direct(session._c_object,

1700

priority, None))

1701

2278

gnutls.priority_set_direct(session._c_object,

2279

priority.encode("utf-8"),

2280

None)

2281

1702

2282

# Start communication using the Mandos protocol

1703

2283

# Get protocol number

1704

2284

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

1709

2289

except (ValueError, IndexError, RuntimeError) as error:

1710

2290

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

1711

2291

return

1712

2292

1713

2293

# Start GnuTLS connection

1714

2294

try:

1715

2295

session.handshake()

1716

except gnutls.errors.GNUTLSError as error:

2296

except gnutls.Error as error:

1717

2297

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

1718

2298

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

1719

2299

# established. Just abandon the request.

1720

2300

return

1721

2301

logger.debug("Handshake succeeded")

1722

2302

1723

2303

approval_required = False

1724

2304

try:

1725

try:

1726

fpr = self.fingerprint(self.peer_certificate

1727

(session))

1728

except (TypeError,

1729

gnutls.errors.GNUTLSError) as error:

1730

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

1731

return

1732

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

1733

1734

try:

1735

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,

1736

2327

self.client_address)

1737

2328

except KeyError:

1738

2329

return

1739

2330

1740

2331

if client.approval_delay:

1741

2332

delay = client.approval_delay

1742

2333

client.approvals_pending += 1

1743

2334

approval_required = True

1744

2335

1745

2336

while True:

1746

2337

if not client.enabled:

1747

2338

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

1748

client.name)

2339

client.name)

1749

2340

if self.server.use_dbus:

1750

2341

# Emit D-Bus signal

1751

2342

client.Rejected("Disabled")

1752

2343

return

1753

2344

1754

2345

if client.approved or not client.approval_delay:

1755

#We are approved or approval is disabled

2346

# We are approved or approval is disabled

1756

2347

break

1757

2348

elif client.approved is None:

1758

2349

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

1760

2351

if self.server.use_dbus:

1761

2352

# Emit D-Bus signal

1762

2353

client.NeedApproval(

1763

client.approval_delay_milliseconds(),

1764

client.approved_by_default)

2354

client.approval_delay.total_seconds()

2355

* 1000, client.approved_by_default)

1765

2356

else:

1766

2357

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

1767

2358

client.name)

1769

2360

# Emit D-Bus signal

1770

2361

client.Rejected("Denied")

1771

2362

return

1772

1773

#wait until timeout or approved

2363

2364

# wait until timeout or approved

1774

2365

time = datetime.datetime.now()

1775

2366

client.changedstate.acquire()

1776

client.changedstate.wait(

1777

float(timedelta_to_milliseconds(delay)

1778

/ 1000))

2367

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

1779

2368

client.changedstate.release()

1780

2369

time2 = datetime.datetime.now()

1781

2370

if (time2 - time) >= delay:

1791

2380

break

1792

2381

else:

1793

2382

delay -= time2 - time

1794

1795

sent_size = 0

1796

while sent_size < len(client.secret):

1797

try:

1798

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

1799

except gnutls.errors.GNUTLSError as error:

1800

logger.warning("gnutls send failed",

1801

exc_info=error)

1802

return

1803

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

1804

sent, len(client.secret)

1805

- (sent_size + sent))

1806

sent_size += sent

1807

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

1808

2391

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

1809

2392

# bump the timeout using extended_timeout

1810

2393

client.bump_timeout(client.extended_timeout)

1811

2394

if self.server.use_dbus:

1812

2395

# Emit D-Bus signal

1813

2396

client.GotSecret()

1814

2397

1815

2398

finally:

1816

2399

if approval_required:

1817

2400

client.approvals_pending -= 1

1818

2401

try:

1819

2402

session.bye()

1820

except gnutls.errors.GNUTLSError as error:

2403

except gnutls.Error as error:

1821

2404

logger.warning("GnuTLS bye failed",

1822

2405

exc_info=error)

1823

2406

1824

2407

@staticmethod

1825

2408

def peer_certificate(session):

1826

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

1827

# If not an OpenPGP certificate...

1828

if (gnutls.library.functions

1829

.gnutls_certificate_type_get(session._c_object)

1830

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1831

# ...do the normal thing

1832

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""

1833

2425

list_size = ctypes.c_uint(1)

1834

cert_list = (gnutls.library.functions

1835

.gnutls_certificate_get_peers

2426

cert_list = (gnutls.certificate_get_peers

1836

2427

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

1837

2428

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

1838

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

1839

" certificate")

2429

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

1840

2430

if list_size.value == 0:

1841

2431

return None

1842

2432

cert = cert_list[0]

1843

2433

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

1844

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

1845

2469

@staticmethod

1846

2470

def fingerprint(openpgp):

1847

2471

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1848

2472

# New GnuTLS "datum" with the OpenPGP public key

1849

datum = (gnutls.library.types

1850

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

1851

ctypes.POINTER

1852

(ctypes.c_ubyte)),

1853

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)))

1854

2477

# New empty GnuTLS certificate

1855

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1856

(gnutls.library.functions

1857

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2478

crt = gnutls.openpgp_crt_t()

2479

gnutls.openpgp_crt_init(ctypes.byref(crt))

1858

2480

# Import the OpenPGP public key into the certificate

1859

(gnutls.library.functions

1860

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

1861

gnutls.library.constants

1862

.GNUTLS_OPENPGP_FMT_RAW))

2481

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

2482

gnutls.OPENPGP_FMT_RAW)

1863

2483

# Verify the self signature in the key

1864

2484

crtverify = ctypes.c_uint()

1865

(gnutls.library.functions

1866

.gnutls_openpgp_crt_verify_self(crt, 0,

1867

ctypes.byref(crtverify)))

2485

gnutls.openpgp_crt_verify_self(crt, 0,

2486

ctypes.byref(crtverify))

1868

2487

if crtverify.value != 0:

1869

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1870

raise (gnutls.errors.CertificateSecurityError

1871

("Verify failed"))

2488

gnutls.openpgp_crt_deinit(crt)

2489

raise gnutls.CertificateSecurityError(code

2490

=crtverify.value)

1872

2491

# New buffer for the fingerprint

1873

2492

buf = ctypes.create_string_buffer(20)

1874

2493

buf_len = ctypes.c_size_t()

1875

2494

# Get the fingerprint from the certificate into the buffer

1876

(gnutls.library.functions

1877

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

1878

ctypes.byref(buf_len)))

2495

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

2496

ctypes.byref(buf_len))

1879

2497

# Deinit the certificate

1880

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2498

gnutls.openpgp_crt_deinit(crt)

1881

2499

# Convert the buffer to a Python bytestring

1882

2500

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

1883

2501

# Convert the bytestring to hexadecimal notation

1885

2503

return hex_fpr

1886

2504

1887

2505

1888

class MultiprocessingMixIn(object):

2506

class MultiprocessingMixIn:

1889

2507

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

2508

1890

2509

def sub_process_main(self, request, address):

1891

2510

try:

1892

2511

self.finish_request(request, address)

1893

2512

except Exception:

1894

2513

self.handle_error(request, address)

1895

2514

self.close_request(request)

1896

2515

1897

2516

def process_request(self, request, address):

1898

2517

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

1899

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

1900

args = (request, address))

2518

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

2519

args=(request, address))

1901

2520

proc.start()

1902

2521

return proc

1903

2522

1904

2523

1905

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2524

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

1906

2525

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

2526

1907

2527

def process_request(self, request, client_address):

1908

2528

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

1909

2529

1910

2530

This function creates a new pipe in self.pipe

1911

2531

"""

1912

2532

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1913

2533

1914

2534

proc = MultiprocessingMixIn.process_request(self, request,

1915

2535

client_address)

1916

2536

self.child_pipe.close()

1917

2537

self.add_pipe(parent_pipe, proc)

1918

2538

1919

2539

def add_pipe(self, parent_pipe, proc):

1920

2540

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

1921

2541

raise NotImplementedError()

1922

2542

1923

2543

1924

2544

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1925

socketserver.TCPServer, object):

2545

socketserver.TCPServer):

1926

2546

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

1927

2547

1928

2548

Attributes:

1929

2549

enabled: Boolean; whether this server is activated yet

1930

2550

interface: None or a network interface name (string)

1931

2551

use_ipv6: Boolean; to use IPv6 or not

1932

2552

"""

2553

1933

2554

def __init__(self, server_address, RequestHandlerClass,

1934

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

2555

interface=None,

2556

use_ipv6=True,

2557

socketfd=None):

1935

2558

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

1936

2559

creating a new one with socket.socket().

1937

2560

"""

1943

2566

self.socketfd = socketfd

1944

2567

# Save the original socket.socket() function

1945

2568

self.socket_socket = socket.socket

2569

1946

2570

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

1947

#

2571

#

1948

2572

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

1949

2573

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

1950

2574

# patching socket.socket.)

1951

#

2575

#

1952

2576

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

1953

2577

@functools.wraps(socket.socket)

1954

2578

def socket_wrapper(*args, **kwargs):

1966

2590

# socket_wrapper(), if socketfd was set.

1967

2591

socketserver.TCPServer.__init__(self, server_address,

1968

2592

RequestHandlerClass)

1969

2593

1970

2594

def server_bind(self):

1971

2595

"""This overrides the normal server_bind() function

1972

2596

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

1973

2597

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

2598

global SO_BINDTODEVICE

1974

2599

if self.interface is not None:

1975

2600

if SO_BINDTODEVICE is None:

1976

logger.error("SO_BINDTODEVICE does not exist;"

1977

" cannot bind to interface %s",

1978

self.interface)

1979

else:

1980

try:

1981

self.socket.setsockopt(socket.SOL_SOCKET,

1982

SO_BINDTODEVICE,

1983

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

1984

except socket.error as error:

1985

if error.errno == errno.EPERM:

1986

logger.error("No permission to bind to"

1987

" interface %s", self.interface)

1988

elif error.errno == errno.ENOPROTOOPT:

1989

logger.error("SO_BINDTODEVICE not available;"

1990

" cannot bind to interface %s",

1991

self.interface)

1992

elif error.errno == errno.ENODEV:

1993

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

1994

" cannot bind", self.interface)

1995

else:

1996

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

1997

2622

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

1998

2623

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

2624

if self.server_address[1]:

2625

self.allow_reuse_address = True

1999

2626

if not self.server_address[0]:

2000

2627

if self.address_family == socket.AF_INET6:

2001

any_address = "::" # in6addr_any

2628

any_address = "::" # in6addr_any

2002

2629

else:

2003

any_address = "0.0.0.0" # INADDR_ANY

2630

any_address = "0.0.0.0" # INADDR_ANY

2004

2631

self.server_address = (any_address,

2005

2632

self.server_address[1])

2006

2633

elif not self.server_address[1]:

2007

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

2008

0)

2634

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

2009

2635

# if self.interface:

2010

2636

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

2011

2637

# 0, # port

2017

2643

2018

2644

class MandosServer(IPv6_TCPServer):

2019

2645

"""Mandos server.

2020

2646

2021

2647

Attributes:

2022

2648

clients: set of Client objects

2023

2649

gnutls_priority GnuTLS priority string

2024

2650

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

2025

2026

Assumes a gobject.MainLoop event loop.

2651

2652

Assumes a GLib.MainLoop event loop.

2027

2653

"""

2654

2028

2655

def __init__(self, server_address, RequestHandlerClass,

2029

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

2030

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):

2031

2662

self.enabled = False

2032

2663

self.clients = clients

2033

2664

if self.clients is None:

2036

2667

self.gnutls_priority = gnutls_priority

2037

2668

IPv6_TCPServer.__init__(self, server_address,

2038

2669

RequestHandlerClass,

2039

interface = interface,

2040

use_ipv6 = use_ipv6,

2041

socketfd = socketfd)

2670

interface=interface,

2671

use_ipv6=use_ipv6,

2672

socketfd=socketfd)

2673

2042

2674

def server_activate(self):

2043

2675

if self.enabled:

2044

2676

return socketserver.TCPServer.server_activate(self)

2045

2677

2046

2678

def enable(self):

2047

2679

self.enabled = True

2048

2680

2049

2681

def add_pipe(self, parent_pipe, proc):

2050

2682

# Call "handle_ipc" for both data and EOF events

2051

gobject.io_add_watch(parent_pipe.fileno(),

2052

gobject.IO_IN | gobject.IO_HUP,

2053

functools.partial(self.handle_ipc,

2054

parent_pipe =

2055

parent_pipe,

2056

proc = proc))

2057

2058

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

2059

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):

2060

2694

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

2061

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

2695

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

2062

2696

# Wait for other process to exit

2063

2697

proc.join()

2064

2698

return False

2065

2699

2066

2700

# Read a request from the child

2067

2701

request = parent_pipe.recv()

2068

2702

command = request[0]

2069

2703

2070

2704

if command == 'init':

2071

fpr = request[1]

2072

address = request[2]

2073

2074

for c in self.clients.itervalues():

2075

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:

2076

2716

client = c

2077

2717

break

2078

2718

else:

2079

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

2080

"dress: %s", fpr, address)

2719

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

2720

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

2081

2721

if self.use_dbus:

2082

2722

# Emit D-Bus signal

2083

mandos_dbus_service.ClientNotFound(fpr,

2723

mandos_dbus_service.ClientNotFound(key_id or fpr,

2084

2724

address[0])

2085

2725

parent_pipe.send(False)

2086

2726

return False

2087

2088

gobject.io_add_watch(parent_pipe.fileno(),

2089

gobject.IO_IN | gobject.IO_HUP,

2090

functools.partial(self.handle_ipc,

2091

parent_pipe =

2092

parent_pipe,

2093

proc = proc,

2094

client_object =

2095

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))

2096

2735

parent_pipe.send(True)

2097

2736

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

2098

2737

# same fileno

2101

2740

funcname = request[1]

2102

2741

args = request[2]

2103

2742

kwargs = request[3]

2104

2743

2105

2744

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

2106

2745

funcname)(*args,

2107

**kwargs)))

2108

2746

**kwargs)))

2747

2109

2748

if command == 'getattr':

2110

2749

attrname = request[1]

2111

if callable(client_object.__getattribute__(attrname)):

2112

parent_pipe.send(('function',))

2750

if isinstance(client_object.__getattribute__(attrname),

2751

collections.Callable):

2752

parent_pipe.send(('function', ))

2113

2753

else:

2114

parent_pipe.send(('data', client_object

2115

.__getattribute__(attrname)))

2116

2754

parent_pipe.send((

2755

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

2756

2117

2757

if command == 'setattr':

2118

2758

attrname = request[1]

2119

2759

value = request[2]

2120

2760

setattr(client_object, attrname, value)

2121

2761

2122

2762

return True

2123

2763

2124

2764

2125

2765

def rfc3339_duration_to_delta(duration):

2126

2766

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

2127

2128

>>> rfc3339_duration_to_delta("P7D")

2129

datetime.timedelta(7)

2130

>>> rfc3339_duration_to_delta("PT60S")

2131

datetime.timedelta(0, 60)

2132

>>> rfc3339_duration_to_delta("PT60M")

2133

datetime.timedelta(0, 3600)

2134

>>> rfc3339_duration_to_delta("PT24H")

2135

datetime.timedelta(1)

2136

>>> rfc3339_duration_to_delta("P1W")

2137

datetime.timedelta(7)

2138

>>> rfc3339_duration_to_delta("PT5M30S")

2139

datetime.timedelta(0, 330)

2140

>>> rfc3339_duration_to_delta("P1DT3M20S")

2141

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

2142

2782

"""

2143

2783

2144

2784

# Parsing an RFC 3339 duration with regular expressions is not

2145

2785

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

2146

2786

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

2147

2787

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

2148

2788

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

2149

2789

# avoid excessive use of external libraries.

2150

2790

2151

2791

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

2152

Token = collections.namedtuple("Token",

2153

("regexp", # To match token; if

2154

# "value" is not None,

2155

# must have a "group"

2156

# containing digits

2157

"value", # datetime.timedelta or

2158

# None

2159

"followers")) # Tokens valid after

2160

# 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

2161

2797

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

2162

2798

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

2163

2799

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

2164

2800

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

2165

2801

datetime.timedelta(seconds=1),

2166

frozenset((token_end,)))

2802

frozenset((token_end, )))

2167

2803

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

2168

2804

datetime.timedelta(minutes=1),

2169

2805

frozenset((token_second, token_end)))

2185

2821

frozenset((token_month, token_end)))

2186

2822

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

2187

2823

datetime.timedelta(weeks=1),

2188

frozenset((token_end,)))

2824

frozenset((token_end, )))

2189

2825

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

2190

2826

frozenset((token_year, token_month,

2191

2827

token_day, token_time,

2192

token_week))),

2193

# Define starting values

2194

value = datetime.timedelta() # Value so far

2828

token_week)))

2829

# Define starting values:

2830

# Value so far

2831

value = datetime.timedelta()

2195

2832

found_token = None

2196

followers = frozenset(token_duration,) # Following valid tokens

2197

s = duration # String left to parse

2833

# Following valid tokens

2834

followers = frozenset((token_duration, ))

2835

# String left to parse

2836

s = duration

2198

2837

# Loop until end token is found

2199

2838

while found_token is not token_end:

2200

2839

# Search for any currently valid tokens

2216

2855

break

2217

2856

else:

2218

2857

# No currently valid tokens were found

2219

raise ValueError("Invalid RFC 3339 duration")

2858

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

2859

.format(duration))

2220

2860

# End token found

2221

2861

return value

2222

2862

2223

2863

2224

2864

def string_to_delta(interval):

2225

2865

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

2226

2227

>>> string_to_delta('7d')

2228

datetime.timedelta(7)

2229

>>> string_to_delta('60s')

2230

datetime.timedelta(0, 60)

2231

>>> string_to_delta('60m')

2232

datetime.timedelta(0, 3600)

2233

>>> string_to_delta('24h')

2234

datetime.timedelta(1)

2235

>>> string_to_delta('1w')

2236

datetime.timedelta(7)

2237

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

2238

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

2239

2879

"""

2240

2880

2241

2881

try:

2242

2882

return rfc3339_duration_to_delta(interval)

2243

2883

except ValueError:

2244

2884

pass

2245

2885

2246

2886

timevalue = datetime.timedelta(0)

2247

2887

for s in interval.split():

2248

2888

try:

2249

suffix = unicode(s[-1])

2889

suffix = s[-1]

2250

2890

value = int(s[:-1])

2251

2891

if suffix == "d":

2252

2892

delta = datetime.timedelta(value)

2259

2899

elif suffix == "w":

2260

2900

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

2261

2901

else:

2262

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

2263

.format(suffix))

2902

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

2264

2903

except IndexError as e:

2265

2904

raise ValueError(*(e.args))

2266

2905

timevalue += delta

2267

2906

return timevalue

2268

2907

2269

2908

2270

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

2909

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

2271

2910

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

2272

2911

2273

2912

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

2274

2913

if os.fork():

2275

2914

sys.exit()

2283

2922

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

2284

2923

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

2285

2924

raise OSError(errno.ENODEV,

2286

"{0} not a character device"

2925

"{} not a character device"

2287

2926

.format(os.devnull))

2288

2927

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

2289

2928

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

2293

2932

2294

2933

2295

2934

def main():

2296

2935

2297

2936

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

2298

2937

# Parsing of options, both command line and config file

2299

2938

2300

2939

parser = argparse.ArgumentParser()

2301

2940

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

2302

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

2941

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

2303

2942

help="show version number and exit")

2304

2943

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

2305

2944

help="Bind to interface IF")

2338

2977

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

2339

2978

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

2340

2979

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

2341

2980

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

2981

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

2982

default=None)

2983

2342

2984

options = parser.parse_args()

2343

2344

if options.check:

2345

import doctest

2346

doctest.testmod()

2347

sys.exit()

2348

2985

2349

2986

# Default values for config file for server-global settings

2350

server_defaults = { "interface": "",

2351

"address": "",

2352

"port": "",

2353

"debug": "False",

2354

"priority":

2355

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

2356

"servicename": "Mandos",

2357

"use_dbus": "True",

2358

"use_ipv6": "True",

2359

"debuglevel": "",

2360

"restore": "True",

2361

"socket": "",

2362

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

2363

"foreground": "False",

2364

}

2365

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

2366

3010

# Parse config file for server-global settings

2367

server_config = configparser.SafeConfigParser(server_defaults)

3011

server_config = configparser.ConfigParser(server_defaults)

2368

3012

del server_defaults

2369

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

2370

"mandos.conf"))

2371

# 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

2372

3015

server_settings = server_config.defaults()

2373

3016

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

2374

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

3017

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

3018

"foreground", "zeroconf"):

2375

3019

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

2376

3020

option)

2377

3021

if server_settings["port"]:

2387

3031

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

2388

3032

["socket"])

2389

3033

del server_config

2390

3034

2391

3035

# Override the settings from the config file with command line

2392

3036

# options, if set.

2393

3037

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

2394

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

2395

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

2396

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

3038

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

3039

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

3040

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

2397

3041

value = getattr(options, option)

2398

3042

if value is not None:

2399

3043

server_settings[option] = value

2400

3044

del options

2401

3045

# Force all strings to be unicode

2402

3046

for option in server_settings.keys():

2403

if type(server_settings[option]) is str:

2404

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"))

2405

3050

# Force all boolean options to be boolean

2406

3051

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

2407

"foreground"):

3052

"foreground", "zeroconf"):

2408

3053

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

2409

3054

# Debug implies foreground

2410

3055

if server_settings["debug"]:

2411

3056

server_settings["foreground"] = True

2412

3057

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

2413

3058

2414

3059

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

2415

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

2416

3066

# For convenience

2417

3067

debug = server_settings["debug"]

2418

3068

debuglevel = server_settings["debuglevel"]

2421

3071

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

2422

3072

stored_state_file)

2423

3073

foreground = server_settings["foreground"]

2424

3074

zeroconf = server_settings["zeroconf"]

3075

2425

3076

if debug:

2426

3077

initlogger(debug, logging.DEBUG)

2427

3078

else:

2430

3081

else:

2431

3082

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

2432

3083

initlogger(debug, level)

2433

3084

2434

3085

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

2435

syslogger.setFormatter(logging.Formatter

2436

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

2437

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

2438

.format(server_settings

2439

["servicename"])))

2440

3086

syslogger.setFormatter(

3087

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

3088

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

3089

server_settings["servicename"])))

3090

2441

3091

# Parse config file with clients

2442

client_config = configparser.SafeConfigParser(Client

2443

.client_defaults)

3092

client_config = configparser.ConfigParser(Client.client_defaults)

2444

3093

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

2445

3094

"clients.conf"))

2446

3095

2447

3096

global mandos_dbus_service

2448

3097

mandos_dbus_service = None

2449

2450

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

2451

server_settings["port"]),

2452

ClientHandler,

2453

interface=(server_settings["interface"]

2454

or None),

2455

use_ipv6=use_ipv6,

2456

gnutls_priority=

2457

server_settings["priority"],

2458

use_dbus=use_dbus,

2459

socketfd=(server_settings["socket"]

2460

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)

2461

3110

if not foreground:

2462

3111

pidfilename = "/run/mandos.pid"

2463

3112

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

2464

3113

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

2465

3114

pidfile = None

2466

3115

try:

2467

pidfile = open(pidfilename, "w")

3116

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

2468

3117

except IOError as e:

2469

3118

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

2470

3119

exc_info=e)

2471

2472

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

3120

3121

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

3122

("mandos", "mandos"),

3123

("nobody", "nogroup")):

2473

3124

try:

2474

3125

uid = pwd.getpwnam(name).pw_uid

2475

gid = pwd.getpwnam(name).pw_gid

3126

gid = pwd.getpwnam(group).pw_gid

2476

3127

break

2477

3128

except KeyError:

2478

3129

continue

2482

3133

try:

2483

3134

os.setgid(gid)

2484

3135

os.setuid(uid)

3136

if debug:

3137

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

3138

gid))

2485

3139

except OSError as error:

3140

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

3141

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

2486

3142

if error.errno != errno.EPERM:

2487

3143

raise

2488

3144

2489

3145

if debug:

2490

3146

# Enable all possible GnuTLS debugging

2491

3147

2492

3148

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

2493

3149

# - GnuTLS manual

2494

gnutls.library.functions.gnutls_global_set_log_level(11)

2495

2496

@gnutls.library.types.gnutls_log_func

3150

gnutls.global_set_log_level(11)

3151

3152

@gnutls.log_func

2497

3153

def debug_gnutls(level, string):

2498

3154

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

2499

2500

(gnutls.library.functions

2501

.gnutls_global_set_log_function(debug_gnutls))

2502

3155

3156

gnutls.global_set_log_function(debug_gnutls)

3157

2503

3158

# Redirect stdin so all checkers get /dev/null

2504

3159

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

2505

3160

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

2506

3161

if null > 2:

2507

3162

os.close(null)

2508

3163

2509

3164

# Need to fork before connecting to D-Bus

2510

3165

if not foreground:

2511

3166

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

2512

3167

daemon()

2513

2514

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

2515

# need to inform gobject that threads will be used.

2516

gobject.threads_init()

2517

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

2518

3174

global main_loop

2519

3175

# From the Avahi example code

2520

3176

DBusGMainLoop(set_as_default=True)

2521

main_loop = gobject.MainLoop()

3177

main_loop = GLib.MainLoop()

2522

3178

bus = dbus.SystemBus()

2523

3179

# End of Avahi example code

2524

3180

if use_dbus:

2525

3181

try:

2526

3182

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

2527

bus, do_not_queue=True)

2528

old_bus_name = (dbus.service.BusName

2529

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

2530

do_not_queue=True))

2531

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:

2532

3189

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

2533

3190

use_dbus = False

2534

3191

server_settings["use_dbus"] = False

2535

3192

tcp_server.use_dbus = False

2536

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2537

service = AvahiServiceToSyslog(name =

2538

server_settings["servicename"],

2539

servicetype = "_mandos._tcp",

2540

protocol = protocol, bus = bus)

2541

if server_settings["interface"]:

2542

service.interface = (if_nametoindex

2543

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

2544

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

2545

3204

global multiprocessing_manager

2546

3205

multiprocessing_manager = multiprocessing.Manager()

2547

3206

2548

3207

client_class = Client

2549

3208

if use_dbus:

2550

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

2551

3209

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

3210

2552

3211

client_settings = Client.config_parser(client_config)

2553

3212

old_client_settings = {}

2554

3213

clients_data = {}

2555

3214

2556

3215

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

2557

3216

global wnull

2558

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

3217

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

2559

3218

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

2560

3219

# mode

2561

3220

if debug or not foreground:

2562

3221

wnull.close()

2563

3222

2564

3223

# Get client data and settings from last running state.

2565

3224

if server_settings["restore"]:

2566

3225

try:

2567

3226

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

2568

clients_data, old_client_settings = (pickle.load

2569

(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"))

2570

3277

os.remove(stored_state_path)

2571

3278

except IOError as e:

2572

3279

if e.errno == errno.ENOENT:

2573

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

2574

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

3280

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

3281

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

2575

3282

else:

2576

3283

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

2577

3284

exc_info=e)

2578

3285

raise

2579

3286

except EOFError as e:

2580

3287

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

2581

"EOFError:", exc_info=e)

2582

3288

"EOFError:",

3289

exc_info=e)

3290

2583

3291

with PGPEngine() as pgp:

2584

for client_name, client in clients_data.iteritems():

3292

for client_name, client in clients_data.items():

2585

3293

# Skip removed clients

2586

3294

if client_name not in client_settings:

2587

3295

continue

2588

3296

2589

3297

# Decide which value to use after restoring saved state.

2590

3298

# We have three different values: Old config file,

2591

3299

# new config file, and saved state.

2596

3304

# For each value in new config, check if it

2597

3305

# differs from the old config value (Except for

2598

3306

# the "secret" attribute)

2599

if (name != "secret" and

2600

value != old_client_settings[client_name]

2601

[name]):

3307

if (name != "secret"

3308

and (value !=

3309

old_client_settings[client_name][name])):

2602

3310

client[name] = value

2603

3311

except KeyError:

2604

3312

pass

2605

3313

2606

3314

# Clients who has passed its expire date can still be

2607

# enabled if its last checker was successful. Clients

3315

# enabled if its last checker was successful. A Client

2608

3316

# whose checker succeeded before we stored its state is

2609

3317

# assumed to have successfully run all checkers during

2610

3318

# downtime.

2612

3320

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

2613

3321

if not client["last_checked_ok"]:

2614

3322

logger.warning(

2615

"disabling client {0} - Client never "

2616

"performed a successful checker"

2617

.format(client_name))

3323

"disabling client {} - Client never "

3324

"performed a successful checker".format(

3325

client_name))

2618

3326

client["enabled"] = False

2619

3327

elif client["last_checker_status"] != 0:

2620

3328

logger.warning(

2621

"disabling client {0} - Client "

2622

"last checker failed with error code {1}"

2623

.format(client_name,

2624

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"]))

2625

3334

client["enabled"] = False

2626

3335

else:

2627

client["expires"] = (datetime.datetime

2628

.utcnow()

2629

+ client["timeout"])

3336

client["expires"] = (

3337

datetime.datetime.utcnow()

3338

+ client["timeout"])

2630

3339

logger.debug("Last checker succeeded,"

2631

" keeping {0} enabled"

2632

.format(client_name))

3340

" keeping {} enabled".format(

3341

client_name))

2633

3342

try:

2634

client["secret"] = (

2635

pgp.decrypt(client["encrypted_secret"],

2636

client_settings[client_name]

2637

["secret"]))

3343

client["secret"] = pgp.decrypt(

3344

client["encrypted_secret"],

3345

client_settings[client_name]["secret"])

2638

3346

except PGPError:

2639

3347

# If decryption fails, we use secret from new settings

2640

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

2641

.format(client_name))

2642

client["secret"] = (

2643

client_settings[client_name]["secret"])

2644

3348

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

3349

client_name))

3350

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

3351

["secret"])

3352

2645

3353

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

2646

3354

for client_name in (set(old_client_settings)

2647

3355

- set(client_settings)):

2649

3357

for client_name in (set(client_settings)

2650

3358

- set(old_client_settings)):

2651

3359

clients_data[client_name] = client_settings[client_name]

2652

3360

2653

3361

# Create all client objects

2654

for client_name, client in clients_data.iteritems():

3362

for client_name, client in clients_data.items():

2655

3363

tcp_server.clients[client_name] = client_class(

2656

name = client_name, settings = client,

2657

server_settings = server_settings)

2658

3364

name=client_name,

3365

settings=client,

3366

server_settings=server_settings)

3367

2659

3368

if not tcp_server.clients:

2660

3369

logger.warning("No clients defined")

2661

3370

2662

3371

if not foreground:

2663

3372

if pidfile is not None:

3373

pid = os.getpid()

2664

3374

try:

2665

3375

with pidfile:

2666

pid = os.getpid()

2667

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

3376

print(pid, file=pidfile)

2668

3377

except IOError:

2669

3378

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

2670

3379

pidfilename, pid)

2671

3380

del pidfile

2672

3381

del pidfilename

2673

2674

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

2675

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

2676

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

2677

3387

if use_dbus:

2678

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

2679

"se.bsnet.fukt.Mandos"})

2680

class MandosDBusService(DBusObjectWithProperties):

3388

3389

@alternate_dbus_interfaces(

3390

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

3391

class MandosDBusService(DBusObjectWithObjectManager):

2681

3392

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

3393

2682

3394

def __init__(self):

2683

3395

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

3396

2684

3397

_interface = "se.recompile.Mandos"

2685

2686

@dbus_interface_annotations(_interface)

2687

def _foo(self):

2688

return { "org.freedesktop.DBus.Property"

2689

".EmitsChangedSignal":

2690

"false"}

2691

3398

2692

3399

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

2693

3400

def ClientAdded(self, objpath):

2694

3401

"D-Bus signal"

2695

3402

pass

2696

3403

2697

3404

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

2698

def ClientNotFound(self, fingerprint, address):

3405

def ClientNotFound(self, key_id, address):

2699

3406

"D-Bus signal"

2700

3407

pass

2701

3408

3409

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

3410

"true"})

2702

3411

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

2703

3412

def ClientRemoved(self, objpath, name):

2704

3413

"D-Bus signal"

2705

3414

pass

2706

3415

3416

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

3417

"true"})

2707

3418

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

2708

3419

def GetAllClients(self):

2709

3420

"D-Bus method"

2710

return dbus.Array(c.dbus_object_path

2711

for c in

2712

tcp_server.clients.itervalues())

2713

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"})

2714

3426

@dbus.service.method(_interface,

2715

3427

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

2716

3428

def GetAllClientsWithProperties(self):

2717

3429

"D-Bus method"

2718

3430

return dbus.Dictionary(

2719

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

2720

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()},

2721

3434

signature="oa{sv}")

2722

3435

2723

3436

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

2724

3437

def RemoveClient(self, object_path):

2725

3438

"D-Bus method"

2726

for c in tcp_server.clients.itervalues():

3439

for c in tcp_server.clients.values():

2727

3440

if c.dbus_object_path == object_path:

2728

3441

del tcp_server.clients[c.name]

2729

3442

c.remove_from_connection()

2730

# Don't signal anything except ClientRemoved

3443

# Don't signal the disabling

2731

3444

c.disable(quiet=True)

2732

# Emit D-Bus signal

2733

self.ClientRemoved(object_path, c.name)

3445

# Emit D-Bus signal for removal

3446

self.client_removed_signal(c)

2734

3447

return

2735

3448

raise KeyError(object_path)

2736

3449

2737

3450

del _interface

2738

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

2739

3488

mandos_dbus_service = MandosDBusService()

2740

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

2741

3495

def cleanup():

2742

3496

"Cleanup function; run on exit"

2743

service.cleanup()

2744

2745

multiprocessing.active_children()

2746

wnull.close()

3497

if zeroconf:

3498

service.cleanup()

3499

3500

mp.active_children()

3501

wn.close()

2747

3502

if not (tcp_server.clients or client_settings):

2748

3503

return

2749

3504

2750

3505

# Store client before exiting. Secrets are encrypted with key

2751

3506

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

2752

3507

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

2753

3508

clients = {}

2754

3509

with PGPEngine() as pgp:

2755

for client in tcp_server.clients.itervalues():

3510

for client in tcp_server.clients.values():

2756

3511

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

2757

3512

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

2758

3513

key)

2759

3514

client_dict = {}

2760

3515

2761

3516

# A list of attributes that can not be pickled

2762

3517

# + secret.

2763

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

2764

"checker", "server_settings"))

2765

for name, typ in (inspect.getmembers

2766

(dbus.service.Object)):

3518

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

3519

"checker", "server_settings"}

3520

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

3521

.Object):

2767

3522

exclude.add(name)

2768

3523

2769

3524

client_dict["encrypted_secret"] = (client

2770

3525

.encrypted_secret)

2771

3526

for attr in client.client_structure:

2772

3527

if attr not in exclude:

2773

3528

client_dict[attr] = getattr(client, attr)

2774

3529

2775

3530

clients[client.name] = client_dict

2776

3531

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

2777

3532

2778

3533

try:

2779

with (tempfile.NamedTemporaryFile

2780

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

2781

dir=os.path.dirname(stored_state_path),

2782

delete=False)) as stored_state:

2783

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

2784

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

2785

3543

os.rename(tempname, stored_state_path)

2786

3544

except (IOError, OSError) as e:

2787

3545

if not debug:

2790

3548

except NameError:

2791

3549

pass

2792

3550

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

2793

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

3551

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

2794

3552

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

2795

3553

else:

2796

3554

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

2797

3555

exc_info=e)

2798

3556

raise

2799

3557

2800

3558

# Delete all clients, and settings from config

2801

3559

while tcp_server.clients:

2802

3560

name, client = tcp_server.clients.popitem()

2803

3561

if use_dbus:

2804

3562

client.remove_from_connection()

2805

# Don't signal anything except ClientRemoved

3563

# Don't signal the disabling

2806

3564

client.disable(quiet=True)

3565

# Emit D-Bus signal for removal

2807

3566

if use_dbus:

2808

# Emit D-Bus signal

2809

mandos_dbus_service.ClientRemoved(client

2810

.dbus_object_path,

2811

client.name)

3567

mandos_dbus_service.client_removed_signal(client)

2812

3568

client_settings.clear()

2813

3569

2814

3570

atexit.register(cleanup)

2815

2816

for client in tcp_server.clients.itervalues():

3571

3572

for client in tcp_server.clients.values():

2817

3573

if use_dbus:

2818

# Emit D-Bus signal

2819

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3574

# Emit D-Bus signal for adding

3575

mandos_dbus_service.client_added_signal(client)

2820

3576

# Need to initiate checking of clients

2821

3577

if client.enabled:

2822

3578

client.init_checker()

2823

3579

2824

3580

tcp_server.enable()

2825

3581

tcp_server.server_activate()

2826

3582

2827

3583

# Find out what port we got

2828

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

3584

if zeroconf:

3585

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

2829

3586

if use_ipv6:

2830

3587

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

2831

3588

" flowinfo %d, scope_id %d",

2833

3590

else: # IPv4

2834

3591

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

2835

3592

*tcp_server.socket.getsockname())

2836

2837

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

2838

3593

3594

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

3595

2839

3596

try:

2840

# From the Avahi example code

2841

try:

2842

service.activate()

2843

except dbus.exceptions.DBusException as error:

2844

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

2845

cleanup()

2846

sys.exit(1)

2847

# End of Avahi example code

2848

2849

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

2850

lambda *args, **kwargs:

2851

(tcp_server.handle_request

2852

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

2853

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

2854

3613

logger.debug("Starting main loop")

2855

3614

main_loop.run()

2856

3615

except AvahiError as error:

2865

3624

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

2866

3625

cleanup()

2867

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

2868

3644

if __name__ == '__main__':

2869

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()