/mandos/trunk : revision 561.1.1

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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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#!/usr/bin/python

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# -*- mode: python; 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 file is part of Mandos.

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#

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

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

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#

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

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

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

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# (at your option) any later version.

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#

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

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# WITHOUT ANY WARRANTY; without even the implied warranty of

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

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

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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# GNU General Public License for more details.

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#

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#

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

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

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#

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# along with this program. If not, see

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

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#

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

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#

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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36

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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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43

try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import SocketServer as socketserver

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38

import socket

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39

import argparse

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40

import datetime

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41

import errno

51

try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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49

import sys

56

50

import re

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51

import os

66

60

import struct

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61

import fcntl

68

62

import functools

69

try:

70

import cPickle as pickle

71

except ImportError:

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import pickle

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import cPickle as pickle

73

64

import multiprocessing

74

65

import types

75

66

import binascii

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67

import tempfile

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68

import itertools

78

import collections

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import codecs

80

import unittest

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import random

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import shlex

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69

84

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import dbus

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71

import dbus.service

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import gi

87

from gi.repository import GLib

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import gobject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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if sys.version_info.major == 2:

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__metaclass__ = type

96

str = unicode

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# Add collections.abc.Callable if it does not exist

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try:

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collections.abc.Callable

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except AttributeError:

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class abc:

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Callable = collections.Callable

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collections.abc = abc

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del abc

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# Add shlex.quote if it does not exist

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try:

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shlex.quote

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except AttributeError:

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shlex.quote = re.escape

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113

# 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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118

# 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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import GnuPGInterface

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except AttributeError:

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try:

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# This is where SO_BINDTODEVICE was up to and including Python

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# 2.6, and also 3.2:

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from IN import SO_BINDTODEVICE

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except ImportError:

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

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# Try running the C preprocessor:

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try:

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

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"/dev/stdin"],

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE)

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stdout = cc.communicate(

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

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

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except (OSError, ValueError, IndexError):

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# No value found

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SO_BINDTODEVICE = None

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if sys.version_info < (3, 2):

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configparser.Configparser = configparser.SafeConfigParser

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version = "1.8.11"

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SO_BINDTODEVICE = None

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version = "1.5.3"

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stored_state_file = "clients.pickle"

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91

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logger = logging.getLogger()

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

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syslogger = None

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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try:

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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158

102

def if_nametoindex(interface):

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

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104

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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167

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def copy_function(func):

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

170

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)

176

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__)

182

183

184

114

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

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"""init logger and add loglevel"""

186

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global syslogger

188

syslogger = (logging.handlers.SysLogHandler(

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facility=logging.handlers.SysLogHandler.LOG_DAEMON,

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address="/dev/log"))

116

191

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syslogger.setFormatter(logging.Formatter

192

118

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

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' %(message)s'))

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logger.addHandler(syslogger)

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121

196

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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:

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class PGPEngine(object):

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

213

214

139

def __init__(self):

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self.gnupg = GnuPGInterface.GnuPG()

215

141

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"])

219

for line in output.splitlines():

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

221

if name == b"gpg":

222

self.gpg = path

223

break

224

except OSError as e:

225

if e.errno != errno.ENOENT:

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raise

227

self.gnupgargs = ['--batch',

228

'--homedir', self.tempdir,

229

'--force-mdc',

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'--quiet']

231

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

232

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

233

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

234

142

self.gnupg = GnuPGInterface.GnuPG()

143

self.gnupg.options.meta_interactive = False

144

self.gnupg.options.homedir = self.tempdir

145

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

146

'--quiet',

147

'--no-use-agent'])

148

235

149

def __enter__(self):

236

150

return self

237

238

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

151

152

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

239

153

self._cleanup()

240

154

return False

241

155

242

156

def __del__(self):

243

157

self._cleanup()

244

158

245

159

def _cleanup(self):

246

160

if self.tempdir is not None:

247

161

# Delete contents of tempdir

248

162

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

249

topdown=False):

163

topdown = False):

250

164

for filename in files:

251

165

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

252

166

for dirname in dirs:

254

168

# Remove tempdir

255

169

os.rmdir(self.tempdir)

256

170

self.tempdir = None

257

171

258

172

def password_encode(self, password):

259

173

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

260

174

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

261

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

262

if len(encoded) > 2048:

263

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

264

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

265

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

266

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

267

return encoded

268

175

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

176

269

177

def encrypt(self, data, password):

270

passphrase = self.password_encode(password)

271

with tempfile.NamedTemporaryFile(

272

dir=self.tempdir) as passfile:

273

passfile.write(passphrase)

274

passfile.flush()

275

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

276

'--passphrase-file',

277

passfile.name]

278

+ self.gnupgargs,

279

stdin=subprocess.PIPE,

280

stdout=subprocess.PIPE,

281

stderr=subprocess.PIPE)

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

283

if proc.returncode != 0:

284

raise PGPError(err)

178

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

179

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

180

try:

181

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

182

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

183

attach_fhs={'stderr': devnull})

184

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

185

f.write(data)

186

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

187

ciphertext = f.read()

188

proc.wait()

189

except IOError as e:

190

raise PGPError(e)

191

self.gnupg.passphrase = None

285

192

return ciphertext

286

193

287

194

def decrypt(self, data, password):

288

passphrase = self.password_encode(password)

289

with tempfile.NamedTemporaryFile(

290

dir=self.tempdir) as passfile:

291

passfile.write(passphrase)

292

passfile.flush()

293

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

294

'--passphrase-file',

295

passfile.name]

296

+ self.gnupgargs,

297

stdin=subprocess.PIPE,

298

stdout=subprocess.PIPE,

299

stderr=subprocess.PIPE)

300

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

301

if proc.returncode != 0:

302

raise PGPError(err)

195

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

196

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

197

try:

198

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

199

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

200

attach_fhs={'stderr': devnull})

201

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

202

f.write(data)

203

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

204

decrypted_plaintext = f.read()

205

proc.wait()

206

except IOError as e:

207

raise PGPError(e)

208

self.gnupg.passphrase = None

303

209

return decrypted_plaintext

304

210

305

211

306

# Pretend that we have an Avahi module

307

class avahi:

308

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

309

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

310

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

311

PROTO_INET = 0 # avahi-common/address.h

312

PROTO_INET6 = 1 # avahi-common/address.h

313

DBUS_NAME = "org.freedesktop.Avahi"

314

DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

315

DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

316

DBUS_PATH_SERVER = "/"

317

318

@staticmethod

319

def string_array_to_txt_array(t):

320

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

321

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

322

ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

323

ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

324

ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

325

SERVER_INVALID = 0 # avahi-common/defs.h

326

SERVER_REGISTERING = 1 # avahi-common/defs.h

327

SERVER_RUNNING = 2 # avahi-common/defs.h

328

SERVER_COLLISION = 3 # avahi-common/defs.h

329

SERVER_FAILURE = 4 # avahi-common/defs.h

330

331

212

332

213

class AvahiError(Exception):

333

214

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

334

215

self.value = value

335

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

336

**kwargs)

337

216

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

217

def __unicode__(self):

218

return unicode(repr(self.value))

338

219

339

220

class AvahiServiceError(AvahiError):

340

221

pass

341

222

342

343

223

class AvahiGroupError(AvahiError):

344

224

pass

345

225

346

226

347

class AvahiService:

227

class AvahiService(object):

348

228

"""An Avahi (Zeroconf) service.

349

229

350

230

Attributes:

351

231

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

352

232

Used to optionally bind to the specified interface.

353

233

name: string; Example: 'Mandos'

354

234

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

355

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

235

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

356

236

port: integer; what port to announce

357

237

TXT: list of strings; TXT record for the service

358

238

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

364

244

server: D-Bus Server

365

245

bus: dbus.SystemBus()

366

246

"""

367

368

def __init__(self,

369

interface=avahi.IF_UNSPEC,

370

name=None,

371

servicetype=None,

372

port=None,

373

TXT=None,

374

domain="",

375

host="",

376

max_renames=32768,

377

protocol=avahi.PROTO_UNSPEC,

378

bus=None):

247

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

248

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

249

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

250

protocol = avahi.PROTO_UNSPEC, bus = None):

379

251

self.interface = interface

380

252

self.name = name

381

253

self.type = servicetype

390

262

self.server = None

391

263

self.bus = bus

392

264

self.entry_group_state_changed_match = None

393

394

def rename(self, remove=True):

265

def rename(self):

395

266

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

396

267

if self.rename_count >= self.max_renames:

397

268

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

398

269

" after %i retries, exiting.",

399

270

self.rename_count)

400

271

raise AvahiServiceError("Too many renames")

401

self.name = str(

402

self.server.GetAlternativeServiceName(self.name))

403

self.rename_count += 1

272

self.name = unicode(self.server

273

.GetAlternativeServiceName(self.name))

404

274

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

405

275

self.name)

406

if remove:

407

self.remove()

276

self.remove()

408

277

try:

409

278

self.add()

410

279

except dbus.exceptions.DBusException as error:

411

if (error.get_dbus_name()

412

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

413

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

414

return self.rename(remove=False)

415

else:

416

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

417

self.cleanup()

418

os._exit(1)

419

280

logger.critical("DBusException: %s", error)

281

self.cleanup()

282

os._exit(1)

283

self.rename_count += 1

420

284

def remove(self):

421

285

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

422

286

if self.entry_group_state_changed_match is not None:

424

288

self.entry_group_state_changed_match = None

425

289

if self.group is not None:

426

290

self.group.Reset()

427

428

291

def add(self):

429

292

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

430

293

self.remove()

447

310

dbus.UInt16(self.port),

448

311

avahi.string_array_to_txt_array(self.TXT))

449

312

self.group.Commit()

450

451

313

def entry_group_state_changed(self, state, error):

452

314

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

453

315

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

454

316

455

317

if state == avahi.ENTRY_GROUP_ESTABLISHED:

456

318

logger.debug("Zeroconf service established.")

457

319

elif state == avahi.ENTRY_GROUP_COLLISION:

459

321

self.rename()

460

322

elif state == avahi.ENTRY_GROUP_FAILURE:

461

323

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

462

str(error))

463

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

464

324

unicode(error))

325

raise AvahiGroupError("State changed: %s"

326

% unicode(error))

465

327

def cleanup(self):

466

328

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

467

329

if self.group is not None:

472

334

pass

473

335

self.group = None

474

336

self.remove()

475

476

337

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

477

338

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

478

339

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

479

bad_states = {

480

avahi.SERVER_INVALID: "Zeroconf server invalid",

481

avahi.SERVER_REGISTERING: None,

482

avahi.SERVER_COLLISION: "Zeroconf server name collision",

483

avahi.SERVER_FAILURE: "Zeroconf server failure",

484

}

340

bad_states = { avahi.SERVER_INVALID:

341

"Zeroconf server invalid",

342

avahi.SERVER_REGISTERING: None,

343

avahi.SERVER_COLLISION:

344

"Zeroconf server name collision",

345

avahi.SERVER_FAILURE:

346

"Zeroconf server failure" }

485

347

if state in bad_states:

486

348

if bad_states[state] is not None:

487

349

if error is None:

490

352

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

491

353

self.cleanup()

492

354

elif state == avahi.SERVER_RUNNING:

493

try:

494

self.add()

495

except dbus.exceptions.DBusException as error:

496

if (error.get_dbus_name()

497

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

498

logger.info("Local Zeroconf service name"

499

" collision.")

500

return self.rename(remove=False)

501

else:

502

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

503

self.cleanup()

504

os._exit(1)

355

self.add()

505

356

else:

506

357

if error is None:

507

358

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

508

359

else:

509

360

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

510

511

361

def activate(self):

512

362

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

513

363

if self.server is None:

517

367

follow_name_owner_changes=True),

518

368

avahi.DBUS_INTERFACE_SERVER)

519

369

self.server.connect_to_signal("StateChanged",

520

self.server_state_changed)

370

self.server_state_changed)

521

371

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

522

372

523

524

373

class AvahiServiceToSyslog(AvahiService):

525

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

374

def rename(self):

526

375

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

527

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

528

syslogger.setFormatter(logging.Formatter(

529

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

530

.format(self.name)))

376

ret = AvahiService.rename(self)

377

syslogger.setFormatter(logging.Formatter

378

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

379

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

380

% self.name))

531

381

return ret

532

382

533

534

# Pretend that we have a GnuTLS module

535

class gnutls:

536

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

537

538

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

539

if library is None:

540

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

541

_library = ctypes.cdll.LoadLibrary(library)

542

del library

543

544

# Unless otherwise indicated, the constants and types below are

545

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

546

547

# Constants

548

E_SUCCESS = 0

549

E_INTERRUPTED = -52

550

E_AGAIN = -28

551

CRT_OPENPGP = 2

552

CRT_RAWPK = 3

553

CLIENT = 2

554

SHUT_RDWR = 0

555

CRD_CERTIFICATE = 1

556

E_NO_CERTIFICATE_FOUND = -49

557

X509_FMT_DER = 0

558

NO_TICKETS = 1<<10

559

ENABLE_RAWPK = 1<<18

560

CTYPE_PEERS = 3

561

KEYID_USE_SHA256 = 1 # gnutls/x509.h

562

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

563

564

# Types

565

class session_int(ctypes.Structure):

566

_fields_ = []

567

session_t = ctypes.POINTER(session_int)

568

569

class certificate_credentials_st(ctypes.Structure):

570

_fields_ = []

571

certificate_credentials_t = ctypes.POINTER(

572

certificate_credentials_st)

573

certificate_type_t = ctypes.c_int

574

575

class datum_t(ctypes.Structure):

576

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

577

('size', ctypes.c_uint)]

578

579

class openpgp_crt_int(ctypes.Structure):

580

_fields_ = []

581

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

582

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

583

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

584

credentials_type_t = ctypes.c_int

585

transport_ptr_t = ctypes.c_void_p

586

close_request_t = ctypes.c_int

587

588

# Exceptions

589

class Error(Exception):

590

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

591

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

592

# code is passed, convert it to a string with

593

# gnutls.strerror()

594

self.code = code

595

if message is None and code is not None:

596

message = gnutls.strerror(code)

597

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

598

message, *args)

599

600

class CertificateSecurityError(Error):

601

pass

602

603

# Classes

604

class Credentials:

605

def __init__(self):

606

self._c_object = gnutls.certificate_credentials_t()

607

gnutls.certificate_allocate_credentials(

608

ctypes.byref(self._c_object))

609

self.type = gnutls.CRD_CERTIFICATE

610

611

def __del__(self):

612

gnutls.certificate_free_credentials(self._c_object)

613

614

class ClientSession:

615

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

616

self._c_object = gnutls.session_t()

617

gnutls_flags = gnutls.CLIENT

618

if gnutls.check_version(b"3.5.6"):

619

gnutls_flags |= gnutls.NO_TICKETS

620

if gnutls.has_rawpk:

621

gnutls_flags |= gnutls.ENABLE_RAWPK

622

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

623

del gnutls_flags

624

gnutls.set_default_priority(self._c_object)

625

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

626

gnutls.handshake_set_private_extensions(self._c_object,

627

True)

628

self.socket = socket

629

if credentials is None:

630

credentials = gnutls.Credentials()

631

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

632

ctypes.cast(credentials._c_object,

633

ctypes.c_void_p))

634

self.credentials = credentials

635

636

def __del__(self):

637

gnutls.deinit(self._c_object)

638

639

def handshake(self):

640

return gnutls.handshake(self._c_object)

641

642

def send(self, data):

643

data = bytes(data)

644

data_len = len(data)

645

while data_len > 0:

646

data_len -= gnutls.record_send(self._c_object,

647

data[-data_len:],

648

data_len)

649

650

def bye(self):

651

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

652

653

# Error handling functions

654

def _error_code(result):

655

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

656

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

657

if result >= 0:

658

return result

659

if result == gnutls.E_NO_CERTIFICATE_FOUND:

660

raise gnutls.CertificateSecurityError(code=result)

661

raise gnutls.Error(code=result)

662

663

def _retry_on_error(result, func, arguments):

664

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

665

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

666

while result < 0:

667

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

668

return _error_code(result)

669

result = func(*arguments)

670

return result

671

672

# Unless otherwise indicated, the function declarations below are

673

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

674

675

# Functions

676

priority_set_direct = _library.gnutls_priority_set_direct

677

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

678

ctypes.POINTER(ctypes.c_char_p)]

679

priority_set_direct.restype = _error_code

680

681

init = _library.gnutls_init

682

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

683

init.restype = _error_code

684

685

set_default_priority = _library.gnutls_set_default_priority

686

set_default_priority.argtypes = [session_t]

687

set_default_priority.restype = _error_code

688

689

record_send = _library.gnutls_record_send

690

record_send.argtypes = [session_t, ctypes.c_void_p,

691

ctypes.c_size_t]

692

record_send.restype = ctypes.c_ssize_t

693

record_send.errcheck = _retry_on_error

694

695

certificate_allocate_credentials = (

696

_library.gnutls_certificate_allocate_credentials)

697

certificate_allocate_credentials.argtypes = [

698

ctypes.POINTER(certificate_credentials_t)]

699

certificate_allocate_credentials.restype = _error_code

700

701

certificate_free_credentials = (

702

_library.gnutls_certificate_free_credentials)

703

certificate_free_credentials.argtypes = [

704

certificate_credentials_t]

705

certificate_free_credentials.restype = None

706

707

handshake_set_private_extensions = (

708

_library.gnutls_handshake_set_private_extensions)

709

handshake_set_private_extensions.argtypes = [session_t,

710

ctypes.c_int]

711

handshake_set_private_extensions.restype = None

712

713

credentials_set = _library.gnutls_credentials_set

714

credentials_set.argtypes = [session_t, credentials_type_t,

715

ctypes.c_void_p]

716

credentials_set.restype = _error_code

717

718

strerror = _library.gnutls_strerror

719

strerror.argtypes = [ctypes.c_int]

720

strerror.restype = ctypes.c_char_p

721

722

certificate_type_get = _library.gnutls_certificate_type_get

723

certificate_type_get.argtypes = [session_t]

724

certificate_type_get.restype = _error_code

725

726

certificate_get_peers = _library.gnutls_certificate_get_peers

727

certificate_get_peers.argtypes = [session_t,

728

ctypes.POINTER(ctypes.c_uint)]

729

certificate_get_peers.restype = ctypes.POINTER(datum_t)

730

731

global_set_log_level = _library.gnutls_global_set_log_level

732

global_set_log_level.argtypes = [ctypes.c_int]

733

global_set_log_level.restype = None

734

735

global_set_log_function = _library.gnutls_global_set_log_function

736

global_set_log_function.argtypes = [log_func]

737

global_set_log_function.restype = None

738

739

deinit = _library.gnutls_deinit

740

deinit.argtypes = [session_t]

741

deinit.restype = None

742

743

handshake = _library.gnutls_handshake

744

handshake.argtypes = [session_t]

745

handshake.restype = _error_code

746

handshake.errcheck = _retry_on_error

747

748

transport_set_ptr = _library.gnutls_transport_set_ptr

749

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

750

transport_set_ptr.restype = None

751

752

bye = _library.gnutls_bye

753

bye.argtypes = [session_t, close_request_t]

754

bye.restype = _error_code

755

bye.errcheck = _retry_on_error

756

757

check_version = _library.gnutls_check_version

758

check_version.argtypes = [ctypes.c_char_p]

759

check_version.restype = ctypes.c_char_p

760

761

_need_version = b"3.3.0"

762

if check_version(_need_version) is None:

763

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

764

.format(_need_version))

765

766

_tls_rawpk_version = b"3.6.6"

767

has_rawpk = bool(check_version(_tls_rawpk_version))

768

769

if has_rawpk:

770

# Types

771

class pubkey_st(ctypes.Structure):

772

_fields = []

773

pubkey_t = ctypes.POINTER(pubkey_st)

774

775

x509_crt_fmt_t = ctypes.c_int

776

777

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

778

pubkey_init = _library.gnutls_pubkey_init

779

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

780

pubkey_init.restype = _error_code

781

782

pubkey_import = _library.gnutls_pubkey_import

783

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

784

x509_crt_fmt_t]

785

pubkey_import.restype = _error_code

786

787

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

788

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

789

ctypes.POINTER(ctypes.c_ubyte),

790

ctypes.POINTER(ctypes.c_size_t)]

791

pubkey_get_key_id.restype = _error_code

792

793

pubkey_deinit = _library.gnutls_pubkey_deinit

794

pubkey_deinit.argtypes = [pubkey_t]

795

pubkey_deinit.restype = None

796

else:

797

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

798

799

openpgp_crt_init = _library.gnutls_openpgp_crt_init

800

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

801

openpgp_crt_init.restype = _error_code

802

803

openpgp_crt_import = _library.gnutls_openpgp_crt_import

804

openpgp_crt_import.argtypes = [openpgp_crt_t,

805

ctypes.POINTER(datum_t),

806

openpgp_crt_fmt_t]

807

openpgp_crt_import.restype = _error_code

808

809

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

810

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

811

ctypes.POINTER(ctypes.c_uint)]

812

openpgp_crt_verify_self.restype = _error_code

813

814

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

815

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

816

openpgp_crt_deinit.restype = None

817

818

openpgp_crt_get_fingerprint = (

819

_library.gnutls_openpgp_crt_get_fingerprint)

820

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

821

ctypes.c_void_p,

822

ctypes.POINTER(

823

ctypes.c_size_t)]

824

openpgp_crt_get_fingerprint.restype = _error_code

825

826

if check_version(b"3.6.4"):

827

certificate_type_get2 = _library.gnutls_certificate_type_get2

828

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

829

certificate_type_get2.restype = _error_code

830

831

# Remove non-public functions

832

del _error_code, _retry_on_error

833

834

835

def call_pipe(connection, # : multiprocessing.Connection

836

func, *args, **kwargs):

837

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

838

839

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

840

return value on the provided multiprocessing.Connection.

841

"""

842

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

843

connection.close()

844

845

846

class Client:

383

def timedelta_to_milliseconds(td):

384

"Convert a datetime.timedelta() to milliseconds"

385

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

386

+ (td.seconds * 1000)

387

+ (td.microseconds // 1000))

388

389

class Client(object):

847

390

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

848

391

849

392

Attributes:

850

393

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

851

394

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

852

395

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

853

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

854

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

855

running.

856

checker_callback_tag: a GLib event source tag, or None

396

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

397

to see if the client lives.

398

'None' if no process is running.

399

checker_callback_tag: a gobject event source tag, or None

857

400

checker_command: string; External command which is run to check

858

401

if client lives. %() expansions are done at

859

402

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

860

403

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

861

checker_initiator_tag: a GLib event source tag, or None

404

checker_initiator_tag: a gobject event source tag, or None

862

405

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

863

406

client_structure: Object describing what attributes a client has

864

407

and is used for storing the client at exit

865

408

current_checker_command: string; current running checker_command

866

disable_initiator_tag: a GLib event source tag, or None

409

disable_initiator_tag: a gobject event source tag, or None

867

410

enabled: bool()

868

411

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

869

uniquely identify an OpenPGP client

870

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

871

a client using raw public keys

412

uniquely identify the client

872

413

host: string; available for use by the checker command

873

414

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

874

415

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

876

417

last_checker_status: integer between 0 and 255 reflecting exit

877

418

status of last checker. -1 reflects crashed

878

419

checker, -2 means no checker completed yet.

879

last_checker_signal: The signal which killed the last checker, if

880

last_checker_status is -1

881

420

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

882

421

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

883

422

D-Bus identifiers

888

427

runtime_expansions: Allowed attributes for runtime expansion.

889

428

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

890

429

disabled, or None

891

server_settings: The server_settings dict from main()

892

430

"""

893

431

894

432

runtime_expansions = ("approval_delay", "approval_duration",

895

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

896

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

897

"last_approval_request", "last_checked_ok",

433

"created", "enabled", "fingerprint",

434

"host", "interval", "last_checked_ok",

898

435

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

899

client_defaults = {

900

"timeout": "PT5M",

901

"extended_timeout": "PT15M",

902

"interval": "PT2M",

903

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

904

"host": "",

905

"approval_delay": "PT0S",

906

"approval_duration": "PT1S",

907

"approved_by_default": "True",

908

"enabled": "True",

909

}

436

client_defaults = { "timeout": "5m",

437

"extended_timeout": "15m",

438

"interval": "2m",

439

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

440

"host": "",

441

"approval_delay": "0s",

442

"approval_duration": "1s",

443

"approved_by_default": "True",

444

"enabled": "True",

445

}

446

447

def timeout_milliseconds(self):

448

"Return the 'timeout' attribute in milliseconds"

449

return timedelta_to_milliseconds(self.timeout)

450

451

def extended_timeout_milliseconds(self):

452

"Return the 'extended_timeout' attribute in milliseconds"

453

return timedelta_to_milliseconds(self.extended_timeout)

454

455

def interval_milliseconds(self):

456

"Return the 'interval' attribute in milliseconds"

457

return timedelta_to_milliseconds(self.interval)

458

459

def approval_delay_milliseconds(self):

460

return timedelta_to_milliseconds(self.approval_delay)

910

461

911

462

@staticmethod

912

463

def config_parser(config):

920

471

for client_name in config.sections():

921

472

section = dict(config.items(client_name))

922

473

client = settings[client_name] = {}

923

474

924

475

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

925

476

# Reformat values from string types to Python types

926

477

client["approved_by_default"] = config.getboolean(

927

478

client_name, "approved_by_default")

928

479

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

929

480

"enabled")

930

931

# Uppercase and remove spaces from key_id and fingerprint

932

# for later comparison purposes with return value from the

933

# key_id() and fingerprint() functions

934

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

935

.replace(" ", ""))

481

936

482

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

937

483

.replace(" ", ""))

938

484

if "secret" in section:

939

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

940

.encode("utf-8"),

941

"base64")

485

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

942

486

elif "secfile" in section:

943

487

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

944

488

(section["secfile"])),

945

489

"rb") as secfile:

946

490

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

947

491

else:

948

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

949

.format(section))

492

raise TypeError("No secret or secfile for section %s"

493

% section)

950

494

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

951

495

client["extended_timeout"] = string_to_delta(

952

496

section["extended_timeout"])

959

503

client["last_approval_request"] = None

960

504

client["last_checked_ok"] = None

961

505

client["last_checker_status"] = -2

962

506

963

507

return settings

964

965

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

508

509

510

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

511

"""Note: the 'checker' key in 'config' sets the

512

'checker_command' attribute and *not* the 'checker'

513

attribute."""

966

514

self.name = name

967

if server_settings is None:

968

server_settings = {}

969

self.server_settings = server_settings

970

515

# adding all client settings

971

for setting, value in settings.items():

516

for setting, value in settings.iteritems():

972

517

setattr(self, setting, value)

973

518

974

519

if self.enabled:

975

520

if not hasattr(self, "last_enabled"):

976

521

self.last_enabled = datetime.datetime.utcnow()

980

525

else:

981

526

self.last_enabled = None

982

527

self.expires = None

983

528

984

529

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

985

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

530

# Uppercase and remove spaces from fingerprint for later

531

# comparison purposes with return value from the fingerprint()

532

# function

986

533

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

987

534

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

988

535

datetime.datetime.utcnow())

995

542

self.current_checker_command = None

996

543

self.approved = None

997

544

self.approvals_pending = 0

998

self.changedstate = multiprocessing_manager.Condition(

999

multiprocessing_manager.Lock())

1000

self.client_structure = [attr

1001

for attr in self.__dict__.keys()

545

self.changedstate = (multiprocessing_manager

546

.Condition(multiprocessing_manager

547

.Lock()))

548

self.client_structure = [attr for attr in

549

self.__dict__.iterkeys()

1002

550

if not attr.startswith("_")]

1003

551

self.client_structure.append("client_structure")

1004

1005

for name, t in inspect.getmembers(

1006

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

552

553

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

554

lambda obj:

555

isinstance(obj,

556

property)):

1007

557

if not name.startswith("_"):

1008

558

self.client_structure.append(name)

1009

559

1010

560

# Send notice to process children that client state has changed

1011

561

def send_changedstate(self):

1012

562

with self.changedstate:

1013

563

self.changedstate.notify_all()

1014

564

1015

565

def enable(self):

1016

566

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

1017

567

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

1018

568

# Already enabled

1019

569

return

570

self.send_changedstate()

1020

571

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

1021

572

self.enabled = True

1022

573

self.last_enabled = datetime.datetime.utcnow()

1023

574

self.init_checker()

1024

self.send_changedstate()

1025

575

1026

576

def disable(self, quiet=True):

1027

577

"""Disable this client."""

1028

578

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

1029

579

return False

1030

580

if not quiet:

581

self.send_changedstate()

582

if not quiet:

1031

583

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

1032

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

1033

GLib.source_remove(self.disable_initiator_tag)

584

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

585

gobject.source_remove(self.disable_initiator_tag)

1034

586

self.disable_initiator_tag = None

1035

587

self.expires = None

1036

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

1037

GLib.source_remove(self.checker_initiator_tag)

588

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

589

gobject.source_remove(self.checker_initiator_tag)

1038

590

self.checker_initiator_tag = None

1039

591

self.stop_checker()

1040

592

self.enabled = False

1041

if not quiet:

1042

self.send_changedstate()

1043

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

593

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

1044

594

return False

1045

595

1046

596

def __del__(self):

1047

597

self.disable()

1048

598

1049

599

def init_checker(self):

1050

600

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

1051

601

# and every interval from then on.

1052

if self.checker_initiator_tag is not None:

1053

GLib.source_remove(self.checker_initiator_tag)

1054

self.checker_initiator_tag = GLib.timeout_add(

1055

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

1056

+ 1)),

1057

self.start_checker)

602

self.checker_initiator_tag = (gobject.timeout_add

603

(self.interval_milliseconds(),

604

self.start_checker))

1058

605

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

1059

if self.disable_initiator_tag is not None:

1060

GLib.source_remove(self.disable_initiator_tag)

1061

self.disable_initiator_tag = GLib.timeout_add(

1062

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

606

self.disable_initiator_tag = (gobject.timeout_add

607

(self.timeout_milliseconds(),

608

self.disable))

1063

609

# Also start a new checker *right now*.

1064

610

self.start_checker()

1065

1066

def checker_callback(self, source, condition, connection,

1067

command):

611

612

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

1068

613

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

1069

# Read return code from connection (see call_pipe)

1070

returncode = connection.recv()

1071

connection.close()

1072

if self.checker is not None:

1073

self.checker.join()

1074

614

self.checker_callback_tag = None

1075

615

self.checker = None

1076

1077

if returncode >= 0:

1078

self.last_checker_status = returncode

1079

self.last_checker_signal = None

616

if os.WIFEXITED(condition):

617

self.last_checker_status = os.WEXITSTATUS(condition)

1080

618

if self.last_checker_status == 0:

1081

619

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

1082

620

vars(self))

1083

621

self.checked_ok()

1084

622

else:

1085

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

623

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

624

vars(self))

1086

625

else:

1087

626

self.last_checker_status = -1

1088

self.last_checker_signal = -returncode

1089

627

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

1090

628

vars(self))

1091

return False

1092

629

1093

630

def checked_ok(self):

1094

631

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

1095

632

self.last_checked_ok = datetime.datetime.utcnow()

1096

633

self.last_checker_status = 0

1097

self.last_checker_signal = None

1098

634

self.bump_timeout()

1099

635

1100

636

def bump_timeout(self, timeout=None):

1101

637

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

1102

638

if timeout is None:

1103

639

timeout = self.timeout

1104

640

if self.disable_initiator_tag is not None:

1105

GLib.source_remove(self.disable_initiator_tag)

1106

self.disable_initiator_tag = None

641

gobject.source_remove(self.disable_initiator_tag)

1107

642

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

1108

self.disable_initiator_tag = GLib.timeout_add(

1109

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

643

self.disable_initiator_tag = (gobject.timeout_add

644

(timedelta_to_milliseconds

645

(timeout), self.disable))

1110

646

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

1111

647

1112

648

def need_approval(self):

1113

649

self.last_approval_request = datetime.datetime.utcnow()

1114

650

1115

651

def start_checker(self):

1116

652

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

1117

653

1118

654

If a checker already exists, leave it running and do

1119

655

nothing."""

1120

656

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

1121

# did that, and if a checker (for some reason) started running

1122

# slowly and taking more than 'interval' time, then the client

1123

# would inevitably timeout, since no checker would get a

1124

# chance to run to completion. If we instead leave running

657

# did that, then if a checker (for some reason) started

658

# running slowly and taking more than 'interval' time, the

659

# client would inevitably timeout, since no checker would get

660

# a chance to run to completion. If we instead leave running

1125

661

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

1126

662

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

1127

663

# should be.

1128

1129

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

1130

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

1131

self.checker.join()

1132

self.checker = None

664

665

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

666

try:

667

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

668

except (AttributeError, OSError) as error:

669

if (isinstance(error, OSError)

670

and error.errno != errno.ECHILD):

671

raise error

672

else:

673

if pid:

674

logger.warning("Checker was a zombie")

675

gobject.source_remove(self.checker_callback_tag)

676

self.checker_callback(pid, status,

677

self.current_checker_command)

1133

678

# Start a new checker if needed

1134

679

if self.checker is None:

1135

# Escape attributes for the shell

1136

escaped_attrs = {

1137

attr: shlex.quote(str(getattr(self, attr)))

1138

for attr in self.runtime_expansions}

1139

680

try:

1140

command = self.checker_command % escaped_attrs

1141

except TypeError as error:

1142

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

1143

self.checker_command,

1144

exc_info=error)

1145

return True # Try again later

681

# In case checker_command has exactly one % operator

682

command = self.checker_command % self.host

683

except TypeError:

684

# Escape attributes for the shell

685

escaped_attrs = dict(

686

(attr,

687

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

688

errors=

689

'replace')))

690

for attr in

691

self.runtime_expansions)

692

693

try:

694

command = self.checker_command % escaped_attrs

695

except TypeError as error:

696

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

697

' %s', self.checker_command, error)

698

return True # Try again later

1146

699

self.current_checker_command = command

1147

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

1148

self.name)

1149

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

1150

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

1151

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

1152

# always replaced by /dev/null.)

1153

# The exception is when not debugging but nevertheless

1154

# running in the foreground; use the previously

1155

# created wnull.

1156

popen_args = {"close_fds": True,

1157

"shell": True,

1158

"cwd": "/"}

1159

if (not self.server_settings["debug"]

1160

and self.server_settings["foreground"]):

1161

popen_args.update({"stdout": wnull,

1162

"stderr": wnull})

1163

pipe = multiprocessing.Pipe(duplex=False)

1164

self.checker = multiprocessing.Process(

1165

target=call_pipe,

1166

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

1167

kwargs=popen_args)

1168

self.checker.start()

1169

self.checker_callback_tag = GLib.io_add_watch(

1170

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

1171

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

1172

self.checker_callback, pipe[0], command)

1173

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

700

try:

701

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

702

command, self.name)

703

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

704

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

705

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

706

# always replaced by /dev/null.)

707

self.checker = subprocess.Popen(command,

708

close_fds=True,

709

shell=True, cwd="/")

710

self.checker_callback_tag = (gobject.child_watch_add

711

(self.checker.pid,

712

self.checker_callback,

713

data=command))

714

# The checker may have completed before the gobject

715

# watch was added. Check for this.

716

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

717

if pid:

718

gobject.source_remove(self.checker_callback_tag)

719

self.checker_callback(pid, status, command)

720

except OSError as error:

721

logger.error("Failed to start subprocess: %s",

722

error)

723

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

1174

724

return True

1175

725

1176

726

def stop_checker(self):

1177

727

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

1178

728

if self.checker_callback_tag:

1179

GLib.source_remove(self.checker_callback_tag)

729

gobject.source_remove(self.checker_callback_tag)

1180

730

self.checker_callback_tag = None

1181

731

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

1182

732

return

1183

733

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

1184

self.checker.terminate()

734

try:

735

os.kill(self.checker.pid, signal.SIGTERM)

736

#time.sleep(0.5)

737

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

738

# os.kill(self.checker.pid, signal.SIGKILL)

739

except OSError as error:

740

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

741

raise

1185

742

self.checker = None

1186

743

1187

744

1188

def dbus_service_property(dbus_interface,

1189

signature="v",

1190

access="readwrite",

1191

byte_arrays=False):

745

def dbus_service_property(dbus_interface, signature="v",

746

access="readwrite", byte_arrays=False):

1192

747

"""Decorators for marking methods of a DBusObjectWithProperties to

1193

748

become properties on the D-Bus.

1194

749

1195

750

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

1196

751

and with one argument by "Set".

1197

752

1198

753

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

1199

754

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

1200

755

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

1203

758

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

1204

759

if byte_arrays and signature != "ay":

1205

760

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

1206

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

1207

761

" signature %r" % signature)

1208

762

def decorator(func):

1209

763

func._dbus_is_property = True

1210

764

func._dbus_interface = dbus_interface

1213

767

func._dbus_name = func.__name__

1214

768

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

1215

769

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

1216

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

770

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1217

771

return func

1218

1219

772

return decorator

1220

773

1221

774

1222

775

def dbus_interface_annotations(dbus_interface):

1223

"""Decorator for marking functions returning interface annotations

1224

776

"""Decorator for marking functions returning interface annotations.

777

1225

778

Usage:

1226

779

1227

780

@dbus_interface_annotations("org.example.Interface")

1228

781

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

1229

782

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

1230

783

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

1231

784

"false"}

1232

785

"""

1233

1234

786

def decorator(func):

1235

787

func._dbus_is_interface = True

1236

788

func._dbus_interface = dbus_interface

1237

789

func._dbus_name = dbus_interface

1238

790

return func

1239

1240

791

return decorator

1241

792

1242

793

1243

794

def dbus_annotations(annotations):

1244

795

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

1245

796

Usage:

1246

1247

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

1248

"org.freedesktop.DBus.Property."

1249

"EmitsChangedSignal": "false"})

797

1250

798

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

1251

799

access="r")

800

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

801

"org.freedesktop.DBus.Property."

802

"EmitsChangedSignal": "false"})

1252

803

def Property_dbus_property(self):

1253

804

return dbus.Boolean(False)

1254

1255

See also the DBusObjectWithAnnotations class.

1256

805

"""

1257

1258

806

def decorator(func):

1259

807

func._dbus_annotations = annotations

1260

808

return func

1261

1262

809

return decorator

1263

810

1264

811

1265

812

class DBusPropertyException(dbus.exceptions.DBusException):

1266

813

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

1267

814

"""

1268

pass

815

def __unicode__(self):

816

return unicode(str(self))

1269

817

1270

818

1271

819

class DBusPropertyAccessException(DBusPropertyException):

1280

828

pass

1281

829

1282

830

1283

class DBusObjectWithAnnotations(dbus.service.Object):

1284

"""A D-Bus object with annotations.

1285

1286

Classes inheriting from this can use the dbus_annotations

1287

decorator to add annotations to methods or signals.

831

class DBusObjectWithProperties(dbus.service.Object):

832

"""A D-Bus object with properties.

833

834

Classes inheriting from this can use the dbus_service_property

835

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

836

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

1288

837

"""

1289

838

1290

839

@staticmethod

1291

840

def _is_dbus_thing(thing):

1292

841

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

1293

842

1294

843

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

1295

844

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

1296

845

"""

1297

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

846

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

1298

847

False)

1299

848

1300

849

def _get_all_dbus_things(self, thing):

1301

850

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

1302

851

"""

1303

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

852

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

853

name),

1304

854

athing.__get__(self))

1305

855

for cls in self.__class__.__mro__

1306

856

for name, athing in

1307

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

1308

1309

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1310

out_signature="s",

1311

path_keyword='object_path',

1312

connection_keyword='connection')

1313

def Introspect(self, object_path, connection):

1314

"""Overloading of standard D-Bus method.

1315

1316

Inserts annotation tags on methods and signals.

1317

"""

1318

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

1319

connection)

1320

try:

1321

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

1322

1323

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

1324

# Add annotation tags

1325

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

1326

for tag in if_tag.getElementsByTagName(typ):

1327

annots = dict()

1328

for name, prop in (self.

1329

_get_all_dbus_things(typ)):

1330

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

1331

and prop._dbus_interface

1332

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

1333

annots.update(getattr(

1334

prop, "_dbus_annotations", {}))

1335

for name, value in annots.items():

1336

ann_tag = document.createElement(

1337

"annotation")

1338

ann_tag.setAttribute("name", name)

1339

ann_tag.setAttribute("value", value)

1340

tag.appendChild(ann_tag)

1341

# Add interface annotation tags

1342

for annotation, value in dict(

1343

itertools.chain.from_iterable(

1344

annotations().items()

1345

for name, annotations

1346

in self._get_all_dbus_things("interface")

1347

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

1348

)).items():

1349

ann_tag = document.createElement("annotation")

1350

ann_tag.setAttribute("name", annotation)

1351

ann_tag.setAttribute("value", value)

1352

if_tag.appendChild(ann_tag)

1353

# Fix argument name for the Introspect method itself

1354

if (if_tag.getAttribute("name")

1355

== dbus.INTROSPECTABLE_IFACE):

1356

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

1357

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

1358

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

1359

if (arg.getAttribute("direction")

1360

== "out"):

1361

arg.setAttribute("name",

1362

"xml_data")

1363

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

1364

document.unlink()

1365

except (AttributeError, xml.dom.DOMException,

1366

xml.parsers.expat.ExpatError) as error:

1367

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

1368

exc_info=error)

1369

return xmlstring

1370

1371

1372

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1373

"""A D-Bus object with properties.

1374

1375

Classes inheriting from this can use the dbus_service_property

1376

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

1377

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

1378

"""

1379

857

inspect.getmembers(cls,

858

self._is_dbus_thing(thing)))

859

1380

860

def _get_dbus_property(self, interface_name, property_name):

1381

861

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

1382

862

property with the specified name and interface.

1383

863

"""

1384

for cls in self.__class__.__mro__:

1385

for name, value in inspect.getmembers(

1386

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

864

for cls in self.__class__.__mro__:

865

for name, value in (inspect.getmembers

866

(cls,

867

self._is_dbus_thing("property"))):

1387

868

if (value._dbus_name == property_name

1388

869

and value._dbus_interface == interface_name):

1389

870

return value.__get__(self)

1390

871

1391

872

# No such property

1392

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

1393

self.dbus_object_path, interface_name, property_name))

1394

1395

@classmethod

1396

def _get_all_interface_names(cls):

1397

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

1398

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

1399

"_dbus_interface", None)

1400

for x in (inspect.getmro(cls))

1401

for attr in dir(x))

1402

if name is not None)

1403

1404

@dbus.service.method(dbus.PROPERTIES_IFACE,

1405

in_signature="ss",

873

raise DBusPropertyNotFound(self.dbus_object_path + ":"

874

+ interface_name + "."

875

+ property_name)

876

877

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

1406

878

out_signature="v")

1407

879

def Get(self, interface_name, property_name):

1408

880

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

1414

886

if not hasattr(value, "variant_level"):

1415

887

return value

1416

888

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

1417

889

1418

890

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

1419

891

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

1420

892

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

1426

898

# The byte_arrays option is not supported yet on

1427

899

# signatures other than "ay".

1428

900

if prop._dbus_signature != "ay":

1429

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

1430

"'ay' signature {!r}"

1431

.format(prop._dbus_signature))

1432

value = dbus.ByteArray(bytes(value))

901

raise ValueError

902

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

903

for byte in value))

1433

904

prop(value)

1434

1435

@dbus.service.method(dbus.PROPERTIES_IFACE,

1436

in_signature="s",

905

906

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

1437

907

out_signature="a{sv}")

1438

908

def GetAll(self, interface_name):

1439

909

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

1440

910

standard.

1441

911

1442

912

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

1443

913

"""

1444

914

properties = {}

1454

924

if not hasattr(value, "variant_level"):

1455

925

properties[name] = value

1456

926

continue

1457

properties[name] = type(value)(

1458

value, variant_level=value.variant_level + 1)

927

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

928

value.variant_level+1)

1459

929

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

1460

1461

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

1462

def PropertiesChanged(self, interface_name, changed_properties,

1463

invalidated_properties):

1464

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

1465

standard.

1466

"""

1467

pass

1468

930

1469

931

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1470

932

out_signature="s",

1471

933

path_keyword='object_path',

1472

934

connection_keyword='connection')

1473

935

def Introspect(self, object_path, connection):

1474

936

"""Overloading of standard D-Bus method.

1475

937

1476

938

Inserts property tags and interface annotation tags.

1477

939

"""

1478

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1479

object_path,

1480

connection)

940

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

941

connection)

1481

942

try:

1482

943

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

1483

1484

944

def make_tag(document, name, prop):

1485

945

e = document.createElement("property")

1486

946

e.setAttribute("name", name)

1487

947

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

1488

948

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

1489

949

return e

1490

1491

950

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

1492

951

# Add property tags

1493

952

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

1496

955

if prop._dbus_interface

1497

956

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

1498

957

if_tag.appendChild(tag)

1499

# Add annotation tags for properties

1500

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

1501

annots = dict()

1502

for name, prop in self._get_all_dbus_things(

1503

"property"):

1504

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

1505

and prop._dbus_interface

1506

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

1507

annots.update(getattr(

1508

prop, "_dbus_annotations", {}))

1509

for name, value in annots.items():

1510

ann_tag = document.createElement(

1511

"annotation")

1512

ann_tag.setAttribute("name", name)

1513

ann_tag.setAttribute("value", value)

1514

tag.appendChild(ann_tag)

958

# Add annotation tags

959

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

960

for tag in if_tag.getElementsByTagName(typ):

961

annots = dict()

962

for name, prop in (self.

963

_get_all_dbus_things(typ)):

964

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

965

and prop._dbus_interface

966

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

967

annots.update(getattr

968

(prop,

969

"_dbus_annotations",

970

{}))

971

for name, value in annots.iteritems():

972

ann_tag = document.createElement(

973

"annotation")

974

ann_tag.setAttribute("name", name)

975

ann_tag.setAttribute("value", value)

976

tag.appendChild(ann_tag)

977

# Add interface annotation tags

978

for annotation, value in dict(

979

itertools.chain(

980

*(annotations().iteritems()

981

for name, annotations in

982

self._get_all_dbus_things("interface")

983

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

984

))).iteritems():

985

ann_tag = document.createElement("annotation")

986

ann_tag.setAttribute("name", annotation)

987

ann_tag.setAttribute("value", value)

988

if_tag.appendChild(ann_tag)

1515

989

# Add the names to the return values for the

1516

990

# "org.freedesktop.DBus.Properties" methods

1517

991

if (if_tag.getAttribute("name")

1532

1006

except (AttributeError, xml.dom.DOMException,

1533

1007

xml.parsers.expat.ExpatError) as error:

1534

1008

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

1535

exc_info=error)

1536

return xmlstring

1537

1538

1539

try:

1540

dbus.OBJECT_MANAGER_IFACE

1541

except AttributeError:

1542

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

1543

1544

1545

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1546

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

1547

1548

Classes inheriting from this exposes the standard

1549

GetManagedObjects call and the InterfacesAdded and

1550

InterfacesRemoved signals on the standard

1551

"org.freedesktop.DBus.ObjectManager" interface.

1552

1553

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

1554

manually.

1555

"""

1556

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1557

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

1558

def GetManagedObjects(self):

1559

"""This function must be overridden"""

1560

raise NotImplementedError()

1561

1562

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1563

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

1564

def InterfacesAdded(self, object_path, interfaces_and_properties):

1565

pass

1566

1567

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

1568

def InterfacesRemoved(self, object_path, interfaces):

1569

pass

1570

1571

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1572

out_signature="s",

1573

path_keyword='object_path',

1574

connection_keyword='connection')

1575

def Introspect(self, object_path, connection):

1576

"""Overloading of standard D-Bus method.

1577

1578

Override return argument name of GetManagedObjects to be

1579

"objpath_interfaces_and_properties"

1580

"""

1581

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1582

object_path,

1583

connection)

1584

try:

1585

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

1586

1587

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

1588

# Fix argument name for the GetManagedObjects method

1589

if (if_tag.getAttribute("name")

1590

== dbus.OBJECT_MANAGER_IFACE):

1591

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

1592

if (cn.getAttribute("name")

1593

== "GetManagedObjects"):

1594

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

1595

if (arg.getAttribute("direction")

1596

== "out"):

1597

arg.setAttribute(

1598

"name",

1599

"objpath_interfaces"

1600

"_and_properties")

1601

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

1602

document.unlink()

1603

except (AttributeError, xml.dom.DOMException,

1604

xml.parsers.expat.ExpatError) as error:

1605

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

1606

exc_info=error)

1607

return xmlstring

1608

1609

1610

def datetime_to_dbus(dt, variant_level=0):

1009

error)

1010

return xmlstring

1011

1012

1013

def datetime_to_dbus (dt, variant_level=0):

1611

1014

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

1612

1015

if dt is None:

1613

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

1614

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

1615

1616

1617

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1618

"""A class decorator; applied to a subclass of

1619

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

1620

interface names according to the "alt_interface_names" mapping.

1621

Usage:

1622

1623

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

1624

"net.example.AlternateInterface"})

1625

class SampleDBusObject(dbus.service.Object):

1626

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

1627

def SampleDBusMethod():

1628

pass

1629

1630

The above "SampleDBusMethod" on "SampleDBusObject" will be

1631

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

1632

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

1633

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

1634

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

1635

1636

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

1637

(from DBusObjectWithProperties) and interfaces (from the

1638

dbus_interface_annotations decorator).

1016

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

1017

return dbus.String(dt.isoformat(),

1018

variant_level=variant_level)

1019

1020

1021

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

1022

.__metaclass__):

1023

"""Applied to an empty subclass of a D-Bus object, this metaclass

1024

will add additional D-Bus attributes matching a certain pattern.

1639

1025

"""

1640

1641

def wrapper(cls):

1642

for orig_interface_name, alt_interface_name in (

1643

alt_interface_names.items()):

1644

attr = {}

1645

interface_names = set()

1646

# Go though all attributes of the class

1647

for attrname, attribute in inspect.getmembers(cls):

1026

def __new__(mcs, name, bases, attr):

1027

# Go through all the base classes which could have D-Bus

1028

# methods, signals, or properties in them

1029

old_interface_names = []

1030

for base in (b for b in bases

1031

if issubclass(b, dbus.service.Object)):

1032

# Go though all attributes of the base class

1033

for attrname, attribute in inspect.getmembers(base):

1648

1034

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

1649

1035

# with the wrong interface name

1650

1036

if (not hasattr(attribute, "_dbus_interface")

1651

or not attribute._dbus_interface.startswith(

1652

orig_interface_name)):

1037

or not attribute._dbus_interface

1038

.startswith("se.recompile.Mandos")):

1653

1039

continue

1654

1040

# Create an alternate D-Bus interface name based on

1655

1041

# the current name

1656

alt_interface = attribute._dbus_interface.replace(

1657

orig_interface_name, alt_interface_name)

1658

interface_names.add(alt_interface)

1042

alt_interface = (attribute._dbus_interface

1043

.replace("se.recompile.Mandos",

1044

"se.bsnet.fukt.Mandos"))

1045

if alt_interface != attribute._dbus_interface:

1046

old_interface_names.append(alt_interface)

1659

1047

# Is this a D-Bus signal?

1660

1048

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

1661

# Extract the original non-method undecorated

1662

# function by black magic

1663

if sys.version_info.major == 2:

1664

nonmethod_func = (dict(

1049

# Extract the original non-method function by

1050

# black magic

1051

nonmethod_func = (dict(

1665

1052

zip(attribute.func_code.co_freevars,

1666

attribute.__closure__))

1667

["func"].cell_contents)

1668

else:

1669

nonmethod_func = (dict(

1670

zip(attribute.__code__.co_freevars,

1671

attribute.__closure__))

1672

["func"].cell_contents)

1053

attribute.__closure__))["func"]

1054

.cell_contents)

1673

1055

# Create a new, but exactly alike, function

1674

1056

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

1675

1057

# with the alternate D-Bus interface name

1676

new_function = copy_function(nonmethod_func)

1677

new_function = (dbus.service.signal(

1678

alt_interface,

1679

attribute._dbus_signature)(new_function))

1058

new_function = (dbus.service.signal

1059

(alt_interface,

1060

attribute._dbus_signature)

1061

(types.FunctionType(

1062

nonmethod_func.func_code,

1063

nonmethod_func.func_globals,

1064

nonmethod_func.func_name,

1065

nonmethod_func.func_defaults,

1066

nonmethod_func.func_closure)))

1680

1067

# Copy annotations, if any

1681

1068

try:

1682

new_function._dbus_annotations = dict(

1683

attribute._dbus_annotations)

1069

new_function._dbus_annotations = (

1070

dict(attribute._dbus_annotations))

1684

1071

except AttributeError:

1685

1072

pass

1686

1687

1073

# Define a creator of a function to call both the

1688

# original and alternate functions, so both the

1689

# original and alternate signals gets sent when

1690

# the function is called

1074

# old and new functions, so both the old and new

1075

# signals gets sent when the function is called

1691

1076

def fixscope(func1, func2):

1692

1077

"""This function is a scope container to pass

1693

1078

func1 and func2 to the "call_both" function

1694

1079

outside of its arguments"""

1695

1696

@functools.wraps(func2)

1697

1080

def call_both(*args, **kwargs):

1698

1081

"""This function will emit two D-Bus

1699

1082

signals by calling func1 and func2"""

1700

1083

func1(*args, **kwargs)

1701

1084

func2(*args, **kwargs)

1702

# Make wrapper function look like a D-Bus

1703

# signal

1704

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

1705

if name.startswith("_dbus_"):

1706

setattr(call_both, name, attr)

1707

1708

1085

return call_both

1709

1086

# Create the "call_both" function and add it to

1710

1087

# the class

1711

attr[attrname] = fixscope(attribute, new_function)

1088

attr[attrname] = fixscope(attribute,

1089

new_function)

1712

1090

# Is this a D-Bus method?

1713

1091

elif getattr(attribute, "_dbus_is_method", False):

1714

1092

# Create a new, but exactly alike, function

1715

1093

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

1716

1094

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

1717

1095

# to the class.

1718

attr[attrname] = (

1719

dbus.service.method(

1720

alt_interface,

1721

attribute._dbus_in_signature,

1722

attribute._dbus_out_signature)

1723

(copy_function(attribute)))

1096

attr[attrname] = (dbus.service.method

1097

(alt_interface,

1098

attribute._dbus_in_signature,

1099

attribute._dbus_out_signature)

1100

(types.FunctionType

1101

(attribute.func_code,

1102

attribute.func_globals,

1103

attribute.func_name,

1104

attribute.func_defaults,

1105

attribute.func_closure)))

1724

1106

# Copy annotations, if any

1725

1107

try:

1726

attr[attrname]._dbus_annotations = dict(

1727

attribute._dbus_annotations)

1108

attr[attrname]._dbus_annotations = (

1109

dict(attribute._dbus_annotations))

1728

1110

except AttributeError:

1729

1111

pass

1730

1112

# Is this a D-Bus property?

1733

1115

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

1734

1116

# property with the alternate D-Bus interface

1735

1117

# name. Add it to the class.

1736

attr[attrname] = (dbus_service_property(

1737

alt_interface, attribute._dbus_signature,

1738

attribute._dbus_access,

1739

attribute._dbus_get_args_options

1740

["byte_arrays"])

1741

(copy_function(attribute)))

1118

attr[attrname] = (dbus_service_property

1119

(alt_interface,

1120

attribute._dbus_signature,

1121

attribute._dbus_access,

1122

attribute

1123

._dbus_get_args_options

1124

["byte_arrays"])

1125

(types.FunctionType

1126

(attribute.func_code,

1127

attribute.func_globals,

1128

attribute.func_name,

1129

attribute.func_defaults,

1130

attribute.func_closure)))

1742

1131

# Copy annotations, if any

1743

1132

try:

1744

attr[attrname]._dbus_annotations = dict(

1745

attribute._dbus_annotations)

1133

attr[attrname]._dbus_annotations = (

1134

dict(attribute._dbus_annotations))

1746

1135

except AttributeError:

1747

1136

pass

1748

1137

# Is this a D-Bus interface?

1751

1140

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

1752

1141

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

1753

1142

# to the class.

1754

attr[attrname] = (

1755

dbus_interface_annotations(alt_interface)

1756

(copy_function(attribute)))

1757

if deprecate:

1758

# Deprecate all alternate interfaces

1759

iname = "_AlternateDBusNames_interface_annotation{}"

1760

for interface_name in interface_names:

1761

1762

@dbus_interface_annotations(interface_name)

1763

def func(self):

1764

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

1765

"true"}

1766

# Find an unused name

1767

for aname in (iname.format(i)

1768

for i in itertools.count()):

1769

if aname not in attr:

1770

attr[aname] = func

1771

break

1772

if interface_names:

1773

# Replace the class with a new subclass of it with

1774

# methods, signals, etc. as created above.

1775

if sys.version_info.major == 2:

1776

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

1777

(cls, ), attr)

1778

else:

1779

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

1780

(cls, ), attr)

1781

return cls

1782

1783

return wrapper

1784

1785

1786

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

1787

"se.bsnet.fukt.Mandos"})

1143

attr[attrname] = (dbus_interface_annotations

1144

(alt_interface)

1145

(types.FunctionType

1146

(attribute.func_code,

1147

attribute.func_globals,

1148

attribute.func_name,

1149

attribute.func_defaults,

1150

attribute.func_closure)))

1151

# Deprecate all old interfaces

1152

basename="_AlternateDBusNamesMetaclass_interface_annotation{0}"

1153

for old_interface_name in old_interface_names:

1154

@dbus_interface_annotations(old_interface_name)

1155

def func(self):

1156

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

1157

# Find an unused name

1158

for aname in (basename.format(i) for i in

1159

itertools.count()):

1160

if aname not in attr:

1161

attr[aname] = func

1162

break

1163

return type.__new__(mcs, name, bases, attr)

1164

1165

1788

1166

class ClientDBus(Client, DBusObjectWithProperties):

1789

1167

"""A Client class using D-Bus

1790

1168

1791

1169

Attributes:

1792

1170

dbus_object_path: dbus.ObjectPath

1793

1171

bus: dbus.SystemBus()

1794

1172

"""

1795

1173

1796

1174

runtime_expansions = (Client.runtime_expansions

1797

+ ("dbus_object_path", ))

1798

1799

_interface = "se.recompile.Mandos.Client"

1800

1175

+ ("dbus_object_path",))

1176

1801

1177

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

1802

1803

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

1178

1179

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

1804

1180

self.bus = bus

1805

1181

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

1806

1182

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

1807

1183

# the D-Bus

1808

client_object_name = str(self.name).translate(

1184

client_object_name = unicode(self.name).translate(

1809

1185

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

1810

1186

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

1811

self.dbus_object_path = dbus.ObjectPath(

1812

"/clients/" + client_object_name)

1187

self.dbus_object_path = (dbus.ObjectPath

1188

("/clients/" + client_object_name))

1813

1189

DBusObjectWithProperties.__init__(self, self.bus,

1814

1190

self.dbus_object_path)

1815

1816

def notifychangeproperty(transform_func, dbus_name,

1817

type_func=lambda x: x,

1818

variant_level=1,

1819

invalidate_only=False,

1820

_interface=_interface):

1191

1192

def notifychangeproperty(transform_func,

1193

dbus_name, type_func=lambda x: x,

1194

variant_level=1):

1821

1195

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

1822

1196

its changes to DBus.

1823

1197

1824

1198

transform_fun: Function that takes a value and a variant_level

1825

1199

and transforms it to a D-Bus type.

1826

1200

dbus_name: D-Bus name of the variable

1828

1202

to the D-Bus. Default: no transform

1829

1203

variant_level: D-Bus variant level. Default: 1

1830

1204

"""

1831

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

1832

1205

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

1833

1206

def setter(self, value):

1834

1207

if hasattr(self, "dbus_object_path"):

1835

1208

if (not hasattr(self, attrname) or

1836

1209

type_func(getattr(self, attrname, None))

1837

1210

!= type_func(value)):

1838

if invalidate_only:

1839

self.PropertiesChanged(

1840

_interface, dbus.Dictionary(),

1841

dbus.Array((dbus_name, )))

1842

else:

1843

dbus_value = transform_func(

1844

type_func(value),

1845

variant_level=variant_level)

1846

self.PropertyChanged(dbus.String(dbus_name),

1847

dbus_value)

1848

self.PropertiesChanged(

1849

_interface,

1850

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

1851

dbus_value}),

1852

dbus.Array())

1211

dbus_value = transform_func(type_func(value),

1212

variant_level

1213

=variant_level)

1214

self.PropertyChanged(dbus.String(dbus_name),

1215

dbus_value)

1853

1216

setattr(self, attrname, value)

1854

1217

1855

1218

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

1856

1219

1220

1857

1221

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1858

1222

approvals_pending = notifychangeproperty(dbus.Boolean,

1859

1223

"ApprovalPending",

1860

type_func=bool)

1224

type_func = bool)

1861

1225

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

1862

1226

last_enabled = notifychangeproperty(datetime_to_dbus,

1863

1227

"LastEnabled")

1864

checker = notifychangeproperty(

1865

dbus.Boolean, "CheckerRunning",

1866

type_func=lambda checker: checker is not None)

1228

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

1229

type_func = lambda checker:

1230

checker is not None)

1867

1231

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1868

1232

"LastCheckedOK")

1869

1233

last_checker_status = notifychangeproperty(dbus.Int16,

1872

1236

datetime_to_dbus, "LastApprovalRequest")

1873

1237

approved_by_default = notifychangeproperty(dbus.Boolean,

1874

1238

"ApprovedByDefault")

1875

approval_delay = notifychangeproperty(

1876

dbus.UInt64, "ApprovalDelay",

1877

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

1239

approval_delay = notifychangeproperty(dbus.UInt64,

1240

"ApprovalDelay",

1241

type_func =

1242

timedelta_to_milliseconds)

1878

1243

approval_duration = notifychangeproperty(

1879

1244

dbus.UInt64, "ApprovalDuration",

1880

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

1245

type_func = timedelta_to_milliseconds)

1881

1246

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

1882

timeout = notifychangeproperty(

1883

dbus.UInt64, "Timeout",

1884

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

1247

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

1248

type_func =

1249

timedelta_to_milliseconds)

1885

1250

extended_timeout = notifychangeproperty(

1886

1251

dbus.UInt64, "ExtendedTimeout",

1887

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

1888

interval = notifychangeproperty(

1889

dbus.UInt64, "Interval",

1890

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

1252

type_func = timedelta_to_milliseconds)

1253

interval = notifychangeproperty(dbus.UInt64,

1254

"Interval",

1255

type_func =

1256

timedelta_to_milliseconds)

1891

1257

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

1892

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

1893

invalidate_only=True)

1894

1258

1895

1259

del notifychangeproperty

1896

1260

1897

1261

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

1898

1262

try:

1899

1263

self.remove_from_connection()

1902

1266

if hasattr(DBusObjectWithProperties, "__del__"):

1903

1267

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

1904

1268

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

1905

1906

def checker_callback(self, source, condition,

1907

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

1908

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

1909

connection, command, *args,

1910

**kwargs)

1911

exitstatus = self.last_checker_status

1912

if exitstatus >= 0:

1269

1270

def checker_callback(self, pid, condition, command,

1271

*args, **kwargs):

1272

self.checker_callback_tag = None

1273

self.checker = None

1274

if os.WIFEXITED(condition):

1275

exitstatus = os.WEXITSTATUS(condition)

1913

1276

# Emit D-Bus signal

1914

1277

self.CheckerCompleted(dbus.Int16(exitstatus),

1915

# This is specific to GNU libC

1916

dbus.Int64(exitstatus << 8),

1278

dbus.Int64(condition),

1917

1279

dbus.String(command))

1918

1280

else:

1919

1281

# Emit D-Bus signal

1920

1282

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

1921

dbus.Int64(

1922

# This is specific to GNU libC

1923

(exitstatus << 8)

1924

| self.last_checker_signal),

1283

dbus.Int64(condition),

1925

1284

dbus.String(command))

1926

return ret

1927

1285

1286

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

1287

*args, **kwargs)

1288

1928

1289

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

1929

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

1290

old_checker = self.checker

1291

if self.checker is not None:

1292

old_checker_pid = self.checker.pid

1293

else:

1294

old_checker_pid = None

1930

1295

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

1931

1296

# Only if new checker process was started

1932

1297

if (self.checker is not None

1934

1299

# Emit D-Bus signal

1935

1300

self.CheckerStarted(self.current_checker_command)

1936

1301

return r

1937

1302

1938

1303

def _reset_approved(self):

1939

1304

self.approved = None

1940

1305

return False

1941

1306

1942

1307

def approve(self, value=True):

1308

self.send_changedstate()

1943

1309

self.approved = value

1944

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

1945

* 1000), self._reset_approved)

1946

self.send_changedstate()

1947

1948

# D-Bus methods, signals & properties

1949

1950

# Interfaces

1951

1952

# Signals

1953

1310

gobject.timeout_add(timedelta_to_milliseconds

1311

(self.approval_duration),

1312

self._reset_approved)

1313

1314

1315

## D-Bus methods, signals & properties

1316

_interface = "se.recompile.Mandos.Client"

1317

1318

## Interfaces

1319

1320

@dbus_interface_annotations(_interface)

1321

def _foo(self):

1322

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

1323

"false"}

1324

1325

## Signals

1326

1954

1327

# CheckerCompleted - signal

1955

1328

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

1956

1329

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

1957

1330

"D-Bus signal"

1958

1331

pass

1959

1332

1960

1333

# CheckerStarted - signal

1961

1334

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

1962

1335

def CheckerStarted(self, command):

1963

1336

"D-Bus signal"

1964

1337

pass

1965

1338

1966

1339

# PropertyChanged - signal

1967

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

1968

1340

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

1969

1341

def PropertyChanged(self, property, value):

1970

1342

"D-Bus signal"

1971

1343

pass

1972

1344

1973

1345

# GotSecret - signal

1974

1346

@dbus.service.signal(_interface)

1975

1347

def GotSecret(self):

1978

1350

server to mandos-client

1979

1351

"""

1980

1352

pass

1981

1353

1982

1354

# Rejected - signal

1983

1355

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

1984

1356

def Rejected(self, reason):

1985

1357

"D-Bus signal"

1986

1358

pass

1987

1359

1988

1360

# NeedApproval - signal

1989

1361

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

1990

1362

def NeedApproval(self, timeout, default):

1991

1363

"D-Bus signal"

1992

1364

return self.need_approval()

1993

1994

# Methods

1995

1365

1366

## Methods

1367

1996

1368

# Approve - method

1997

1369

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

1998

1370

def Approve(self, value):

1999

1371

self.approve(value)

2000

1372

2001

1373

# CheckedOK - method

2002

1374

@dbus.service.method(_interface)

2003

1375

def CheckedOK(self):

2004

1376

self.checked_ok()

2005

1377

2006

1378

# Enable - method

2007

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

2008

1379

@dbus.service.method(_interface)

2009

1380

def Enable(self):

2010

1381

"D-Bus method"

2011

1382

self.enable()

2012

1383

2013

1384

# StartChecker - method

2014

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

2015

1385

@dbus.service.method(_interface)

2016

1386

def StartChecker(self):

2017

1387

"D-Bus method"

2018

1388

self.start_checker()

2019

1389

2020

1390

# Disable - method

2021

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

2022

1391

@dbus.service.method(_interface)

2023

1392

def Disable(self):

2024

1393

"D-Bus method"

2025

1394

self.disable()

2026

1395

2027

1396

# StopChecker - method

2028

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

2029

1397

@dbus.service.method(_interface)

2030

1398

def StopChecker(self):

2031

1399

self.stop_checker()

2032

2033

# Properties

2034

1400

1401

## Properties

1402

2035

1403

# ApprovalPending - property

2036

1404

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

2037

1405

def ApprovalPending_dbus_property(self):

2038

1406

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

2039

1407

2040

1408

# ApprovedByDefault - property

2041

@dbus_service_property(_interface,

2042

signature="b",

1409

@dbus_service_property(_interface, signature="b",

2043

1410

access="readwrite")

2044

1411

def ApprovedByDefault_dbus_property(self, value=None):

2045

1412

if value is None: # get

2046

1413

return dbus.Boolean(self.approved_by_default)

2047

1414

self.approved_by_default = bool(value)

2048

1415

2049

1416

# ApprovalDelay - property

2050

@dbus_service_property(_interface,

2051

signature="t",

1417

@dbus_service_property(_interface, signature="t",

2052

1418

access="readwrite")

2053

1419

def ApprovalDelay_dbus_property(self, value=None):

2054

1420

if value is None: # get

2055

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

2056

* 1000)

1421

return dbus.UInt64(self.approval_delay_milliseconds())

2057

1422

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

2058

1423

2059

1424

# ApprovalDuration - property

2060

@dbus_service_property(_interface,

2061

signature="t",

1425

@dbus_service_property(_interface, signature="t",

2062

1426

access="readwrite")

2063

1427

def ApprovalDuration_dbus_property(self, value=None):

2064

1428

if value is None: # get

2065

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

2066

* 1000)

1429

return dbus.UInt64(timedelta_to_milliseconds(

1430

self.approval_duration))

2067

1431

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

2068

1432

2069

1433

# Name - property

2070

@dbus_annotations(

2071

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

2072

1434

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

2073

1435

def Name_dbus_property(self):

2074

1436

return dbus.String(self.name)

2075

2076

# KeyID - property

2077

@dbus_annotations(

2078

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

2079

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

2080

def KeyID_dbus_property(self):

2081

return dbus.String(self.key_id)

2082

1437

2083

1438

# Fingerprint - property

2084

@dbus_annotations(

2085

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

2086

1439

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

2087

1440

def Fingerprint_dbus_property(self):

2088

1441

return dbus.String(self.fingerprint)

2089

1442

2090

1443

# Host - property

2091

@dbus_service_property(_interface,

2092

signature="s",

1444

@dbus_service_property(_interface, signature="s",

2093

1445

access="readwrite")

2094

1446

def Host_dbus_property(self, value=None):

2095

1447

if value is None: # get

2096

1448

return dbus.String(self.host)

2097

self.host = str(value)

2098

1449

self.host = unicode(value)

1450

2099

1451

# Created - property

2100

@dbus_annotations(

2101

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

2102

1452

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

2103

1453

def Created_dbus_property(self):

2104

1454

return datetime_to_dbus(self.created)

2105

1455

2106

1456

# LastEnabled - property

2107

1457

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

2108

1458

def LastEnabled_dbus_property(self):

2109

1459

return datetime_to_dbus(self.last_enabled)

2110

1460

2111

1461

# Enabled - property

2112

@dbus_service_property(_interface,

2113

signature="b",

1462

@dbus_service_property(_interface, signature="b",

2114

1463

access="readwrite")

2115

1464

def Enabled_dbus_property(self, value=None):

2116

1465

if value is None: # get

2119

1468

self.enable()

2120

1469

else:

2121

1470

self.disable()

2122

1471

2123

1472

# LastCheckedOK - property

2124

@dbus_service_property(_interface,

2125

signature="s",

1473

@dbus_service_property(_interface, signature="s",

2126

1474

access="readwrite")

2127

1475

def LastCheckedOK_dbus_property(self, value=None):

2128

1476

if value is not None:

2129

1477

self.checked_ok()

2130

1478

return

2131

1479

return datetime_to_dbus(self.last_checked_ok)

2132

1480

2133

1481

# LastCheckerStatus - property

2134

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

1482

@dbus_service_property(_interface, signature="n",

1483

access="read")

2135

1484

def LastCheckerStatus_dbus_property(self):

2136

1485

return dbus.Int16(self.last_checker_status)

2137

1486

2138

1487

# Expires - property

2139

1488

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

2140

1489

def Expires_dbus_property(self):

2141

1490

return datetime_to_dbus(self.expires)

2142

1491

2143

1492

# LastApprovalRequest - property

2144

1493

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

2145

1494

def LastApprovalRequest_dbus_property(self):

2146

1495

return datetime_to_dbus(self.last_approval_request)

2147

1496

2148

1497

# Timeout - property

2149

@dbus_service_property(_interface,

2150

signature="t",

1498

@dbus_service_property(_interface, signature="t",

2151

1499

access="readwrite")

2152

1500

def Timeout_dbus_property(self, value=None):

2153

1501

if value is None: # get

2154

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

2155

old_timeout = self.timeout

1502

return dbus.UInt64(self.timeout_milliseconds())

2156

1503

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

2157

# Reschedule disabling

1504

# Reschedule timeout

2158

1505

if self.enabled:

2159

1506

now = datetime.datetime.utcnow()

2160

self.expires += self.timeout - old_timeout

2161

if self.expires <= now:

1507

time_to_die = timedelta_to_milliseconds(

1508

(self.last_checked_ok + self.timeout) - now)

1509

if time_to_die <= 0:

2162

1510

# The timeout has passed

2163

1511

self.disable()

2164

1512

else:

1513

self.expires = (now +

1514

datetime.timedelta(milliseconds =

1515

time_to_die))

2165

1516

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

2166

1517

is None):

2167

1518

return

2168

GLib.source_remove(self.disable_initiator_tag)

2169

self.disable_initiator_tag = GLib.timeout_add(

2170

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

2171

self.disable)

2172

1519

gobject.source_remove(self.disable_initiator_tag)

1520

self.disable_initiator_tag = (gobject.timeout_add

1521

(time_to_die,

1522

self.disable))

1523

2173

1524

# ExtendedTimeout - property

2174

@dbus_service_property(_interface,

2175

signature="t",

1525

@dbus_service_property(_interface, signature="t",

2176

1526

access="readwrite")

2177

1527

def ExtendedTimeout_dbus_property(self, value=None):

2178

1528

if value is None: # get

2179

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

2180

* 1000)

1529

return dbus.UInt64(self.extended_timeout_milliseconds())

2181

1530

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

2182

1531

2183

1532

# Interval - property

2184

@dbus_service_property(_interface,

2185

signature="t",

1533

@dbus_service_property(_interface, signature="t",

2186

1534

access="readwrite")

2187

1535

def Interval_dbus_property(self, value=None):

2188

1536

if value is None: # get

2189

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

1537

return dbus.UInt64(self.interval_milliseconds())

2190

1538

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

2191

1539

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

2192

1540

return

2193

1541

if self.enabled:

2194

1542

# Reschedule checker run

2195

GLib.source_remove(self.checker_initiator_tag)

2196

self.checker_initiator_tag = GLib.timeout_add(

2197

value, self.start_checker)

2198

self.start_checker() # Start one now, too

2199

1543

gobject.source_remove(self.checker_initiator_tag)

1544

self.checker_initiator_tag = (gobject.timeout_add

1545

(value, self.start_checker))

1546

self.start_checker() # Start one now, too

1547

2200

1548

# Checker - property

2201

@dbus_service_property(_interface,

2202

signature="s",

1549

@dbus_service_property(_interface, signature="s",

2203

1550

access="readwrite")

2204

1551

def Checker_dbus_property(self, value=None):

2205

1552

if value is None: # get

2206

1553

return dbus.String(self.checker_command)

2207

self.checker_command = str(value)

2208

1554

self.checker_command = unicode(value)

1555

2209

1556

# CheckerRunning - property

2210

@dbus_service_property(_interface,

2211

signature="b",

1557

@dbus_service_property(_interface, signature="b",

2212

1558

access="readwrite")

2213

1559

def CheckerRunning_dbus_property(self, value=None):

2214

1560

if value is None: # get

2217

1563

self.start_checker()

2218

1564

else:

2219

1565

self.stop_checker()

2220

1566

2221

1567

# ObjectPath - property

2222

@dbus_annotations(

2223

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

2224

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

2225

1568

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

2226

1569

def ObjectPath_dbus_property(self):

2227

return self.dbus_object_path # is already a dbus.ObjectPath

2228

1570

return self.dbus_object_path # is already a dbus.ObjectPath

1571

2229

1572

# Secret = property

2230

@dbus_annotations(

2231

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

2232

"invalidates"})

2233

@dbus_service_property(_interface,

2234

signature="ay",

2235

access="write",

2236

byte_arrays=True)

1573

@dbus_service_property(_interface, signature="ay",

1574

access="write", byte_arrays=True)

2237

1575

def Secret_dbus_property(self, value):

2238

self.secret = bytes(value)

2239

1576

self.secret = str(value)

1577

2240

1578

del _interface

2241

1579

2242

1580

2243

class ProxyClient:

2244

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

1581

class ProxyClient(object):

1582

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

2245

1583

self._pipe = child_pipe

2246

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

1584

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

2247

1585

if not self._pipe.recv():

2248

raise KeyError(key_id or fpr)

2249

1586

raise KeyError()

1587

2250

1588

def __getattribute__(self, name):

2251

1589

if name == '_pipe':

2252

1590

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

2255

1593

if data[0] == 'data':

2256

1594

return data[1]

2257

1595

if data[0] == 'function':

2258

2259

1596

def func(*args, **kwargs):

2260

1597

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

2261

1598

return self._pipe.recv()[1]

2262

2263

1599

return func

2264

1600

2265

1601

def __setattr__(self, name, value):

2266

1602

if name == '_pipe':

2267

1603

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

2268

1604

self._pipe.send(('setattr', name, value))

2269

1605

2270

1606

1607

class ClientDBusTransitional(ClientDBus):

1608

__metaclass__ = AlternateDBusNamesMetaclass

1609

1610

2271

1611

class ClientHandler(socketserver.BaseRequestHandler, object):

2272

1612

"""A class to handle client connections.

2273

1613

2274

1614

Instantiated once for each connection to handle it.

2275

1615

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

2276

1616

2277

1617

def handle(self):

2278

1618

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

2279

1619

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

2280

str(self.client_address))

1620

unicode(self.client_address))

2281

1621

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

2282

1622

self.server.child_pipe.fileno())

2283

2284

session = gnutls.ClientSession(self.request)

2285

2286

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

2287

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

2288

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

2289

# "+DHE-DSS"))

1623

1624

session = (gnutls.connection

1625

.ClientSession(self.request,

1626

gnutls.connection

1627

.X509Credentials()))

1628

1629

# Note: gnutls.connection.X509Credentials is really a

1630

# generic GnuTLS certificate credentials object so long as

1631

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

1632

# here despite using OpenPGP certificates.

1633

1634

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

1635

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

1636

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

1637

# "+DHE-DSS"))

2290

1638

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

2291

1639

priority = self.server.gnutls_priority

2292

1640

if priority is None:

2293

1641

priority = "NORMAL"

2294

gnutls.priority_set_direct(session._c_object,

2295

priority.encode("utf-8"),

2296

None)

2297

1642

(gnutls.library.functions

1643

.gnutls_priority_set_direct(session._c_object,

1644

priority, None))

1645

2298

1646

# Start communication using the Mandos protocol

2299

1647

# Get protocol number

2300

1648

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

2301

1649

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

2302

1650

try:

2303

1651

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

2304

raise RuntimeError(line)

1652

raise RuntimeError

2305

1653

except (ValueError, IndexError, RuntimeError) as error:

2306

1654

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

2307

1655

return

2308

1656

2309

1657

# Start GnuTLS connection

2310

1658

try:

2311

1659

session.handshake()

2312

except gnutls.Error as error:

1660

except gnutls.errors.GNUTLSError as error:

2313

1661

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

2314

1662

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

2315

1663

# established. Just abandon the request.

2316

1664

return

2317

1665

logger.debug("Handshake succeeded")

2318

1666

2319

1667

approval_required = False

2320

1668

try:

2321

if gnutls.has_rawpk:

2322

fpr = b""

2323

try:

2324

key_id = self.key_id(

2325

self.peer_certificate(session))

2326

except (TypeError, gnutls.Error) as error:

2327

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

2328

return

2329

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

2330

2331

else:

2332

key_id = b""

2333

try:

2334

fpr = self.fingerprint(

2335

self.peer_certificate(session))

2336

except (TypeError, gnutls.Error) as error:

2337

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

2338

return

2339

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

2340

2341

try:

2342

client = ProxyClient(child_pipe, key_id, fpr,

1669

try:

1670

fpr = self.fingerprint(self.peer_certificate

1671

(session))

1672

except (TypeError,

1673

gnutls.errors.GNUTLSError) as error:

1674

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

1675

return

1676

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

1677

1678

try:

1679

client = ProxyClient(child_pipe, fpr,

2343

1680

self.client_address)

2344

1681

except KeyError:

2345

1682

return

2346

1683

2347

1684

if client.approval_delay:

2348

1685

delay = client.approval_delay

2349

1686

client.approvals_pending += 1

2350

1687

approval_required = True

2351

1688

2352

1689

while True:

2353

1690

if not client.enabled:

2354

1691

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

2355

client.name)

1692

client.name)

2356

1693

if self.server.use_dbus:

2357

1694

# Emit D-Bus signal

2358

1695

client.Rejected("Disabled")

2359

1696

return

2360

1697

2361

1698

if client.approved or not client.approval_delay:

2362

# We are approved or approval is disabled

1699

#We are approved or approval is disabled

2363

1700

break

2364

1701

elif client.approved is None:

2365

1702

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

2367

1704

if self.server.use_dbus:

2368

1705

# Emit D-Bus signal

2369

1706

client.NeedApproval(

2370

client.approval_delay.total_seconds()

2371

* 1000, client.approved_by_default)

1707

client.approval_delay_milliseconds(),

1708

client.approved_by_default)

2372

1709

else:

2373

1710

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

2374

1711

client.name)

2376

1713

# Emit D-Bus signal

2377

1714

client.Rejected("Denied")

2378

1715

return

2379

2380

# wait until timeout or approved

1716

1717

#wait until timeout or approved

2381

1718

time = datetime.datetime.now()

2382

1719

client.changedstate.acquire()

2383

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

1720

(client.changedstate.wait

1721

(float(client.timedelta_to_milliseconds(delay)

1722

/ 1000)))

2384

1723

client.changedstate.release()

2385

1724

time2 = datetime.datetime.now()

2386

1725

if (time2 - time) >= delay:

2396

1735

break

2397

1736

else:

2398

1737

delay -= time2 - time

2399

2400

try:

2401

session.send(client.secret)

2402

except gnutls.Error as error:

2403

logger.warning("gnutls send failed",

2404

exc_info=error)

2405

return

2406

1738

1739

sent_size = 0

1740

while sent_size < len(client.secret):

1741

try:

1742

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

1743

except gnutls.errors.GNUTLSError as error:

1744

logger.warning("gnutls send failed")

1745

return

1746

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

1747

sent, len(client.secret)

1748

- (sent_size + sent))

1749

sent_size += sent

1750

2407

1751

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

2408

1752

# bump the timeout using extended_timeout

2409

1753

client.bump_timeout(client.extended_timeout)

2410

1754

if self.server.use_dbus:

2411

1755

# Emit D-Bus signal

2412

1756

client.GotSecret()

2413

1757

2414

1758

finally:

2415

1759

if approval_required:

2416

1760

client.approvals_pending -= 1

2417

1761

try:

2418

1762

session.bye()

2419

except gnutls.Error as error:

2420

logger.warning("GnuTLS bye failed",

2421

exc_info=error)

2422

1763

except gnutls.errors.GNUTLSError as error:

1764

logger.warning("GnuTLS bye failed")

1765

2423

1766

@staticmethod

2424

1767

def peer_certificate(session):

2425

"Return the peer's certificate as a bytestring"

2426

try:

2427

cert_type = gnutls.certificate_type_get2(session._c_object,

2428

gnutls.CTYPE_PEERS)

2429

except AttributeError:

2430

cert_type = gnutls.certificate_type_get(session._c_object)

2431

if gnutls.has_rawpk:

2432

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2433

else:

2434

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2435

# If not a valid certificate type...

2436

if cert_type not in valid_cert_types:

2437

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

2438

valid_cert_types)

2439

# ...return invalid data

2440

return b""

1768

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

1769

# If not an OpenPGP certificate...

1770

if (gnutls.library.functions

1771

.gnutls_certificate_type_get(session._c_object)

1772

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1773

# ...do the normal thing

1774

return session.peer_certificate

2441

1775

list_size = ctypes.c_uint(1)

2442

cert_list = (gnutls.certificate_get_peers

1776

cert_list = (gnutls.library.functions

1777

.gnutls_certificate_get_peers

2443

1778

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

2444

1779

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

2445

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

1780

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

1781

" certificate")

2446

1782

if list_size.value == 0:

2447

1783

return None

2448

1784

cert = cert_list[0]

2449

1785

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

2450

2451

@staticmethod

2452

def key_id(certificate):

2453

"Convert a certificate bytestring to a hexdigit key ID"

2454

# New GnuTLS "datum" with the public key

2455

datum = gnutls.datum_t(

2456

ctypes.cast(ctypes.c_char_p(certificate),

2457

ctypes.POINTER(ctypes.c_ubyte)),

2458

ctypes.c_uint(len(certificate)))

2459

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

2460

# New empty GnuTLS certificate

2461

pubkey = gnutls.pubkey_t()

2462

gnutls.pubkey_init(ctypes.byref(pubkey))

2463

# Import the raw public key into the certificate

2464

gnutls.pubkey_import(pubkey,

2465

ctypes.byref(datum),

2466

gnutls.X509_FMT_DER)

2467

# New buffer for the key ID

2468

buf = ctypes.create_string_buffer(32)

2469

buf_len = ctypes.c_size_t(len(buf))

2470

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

2471

gnutls.pubkey_get_key_id(pubkey,

2472

gnutls.KEYID_USE_SHA256,

2473

ctypes.cast(ctypes.byref(buf),

2474

ctypes.POINTER(ctypes.c_ubyte)),

2475

ctypes.byref(buf_len))

2476

# Deinit the certificate

2477

gnutls.pubkey_deinit(pubkey)

2478

2479

# Convert the buffer to a Python bytestring

2480

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

2481

# Convert the bytestring to hexadecimal notation

2482

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

2483

return hex_key_id

2484

1786

2485

1787

@staticmethod

2486

1788

def fingerprint(openpgp):

2487

1789

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2488

1790

# New GnuTLS "datum" with the OpenPGP public key

2489

datum = gnutls.datum_t(

2490

ctypes.cast(ctypes.c_char_p(openpgp),

2491

ctypes.POINTER(ctypes.c_ubyte)),

2492

ctypes.c_uint(len(openpgp)))

1791

datum = (gnutls.library.types

1792

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

1793

ctypes.POINTER

1794

(ctypes.c_ubyte)),

1795

ctypes.c_uint(len(openpgp))))

2493

1796

# New empty GnuTLS certificate

2494

crt = gnutls.openpgp_crt_t()

2495

gnutls.openpgp_crt_init(ctypes.byref(crt))

1797

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1798

(gnutls.library.functions

1799

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2496

1800

# Import the OpenPGP public key into the certificate

2497

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

2498

gnutls.OPENPGP_FMT_RAW)

1801

(gnutls.library.functions

1802

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

1803

gnutls.library.constants

1804

.GNUTLS_OPENPGP_FMT_RAW))

2499

1805

# Verify the self signature in the key

2500

1806

crtverify = ctypes.c_uint()

2501

gnutls.openpgp_crt_verify_self(crt, 0,

2502

ctypes.byref(crtverify))

1807

(gnutls.library.functions

1808

.gnutls_openpgp_crt_verify_self(crt, 0,

1809

ctypes.byref(crtverify)))

2503

1810

if crtverify.value != 0:

2504

gnutls.openpgp_crt_deinit(crt)

2505

raise gnutls.CertificateSecurityError(code

2506

=crtverify.value)

1811

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1812

raise (gnutls.errors.CertificateSecurityError

1813

("Verify failed"))

2507

1814

# New buffer for the fingerprint

2508

1815

buf = ctypes.create_string_buffer(20)

2509

1816

buf_len = ctypes.c_size_t()

2510

1817

# Get the fingerprint from the certificate into the buffer

2511

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

2512

ctypes.byref(buf_len))

1818

(gnutls.library.functions

1819

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

1820

ctypes.byref(buf_len)))

2513

1821

# Deinit the certificate

2514

gnutls.openpgp_crt_deinit(crt)

1822

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2515

1823

# Convert the buffer to a Python bytestring

2516

1824

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

2517

1825

# Convert the bytestring to hexadecimal notation

2519

1827

return hex_fpr

2520

1828

2521

1829

2522

class MultiprocessingMixIn:

1830

class MultiprocessingMixIn(object):

2523

1831

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

2524

2525

1832

def sub_process_main(self, request, address):

2526

1833

try:

2527

1834

self.finish_request(request, address)

2528

1835

except Exception:

2529

1836

self.handle_error(request, address)

2530

1837

self.close_request(request)

2531

1838

2532

1839

def process_request(self, request, address):

2533

1840

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

2534

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

2535

args=(request, address))

1841

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

1842

args = (request,

1843

address))

2536

1844

proc.start()

2537

1845

return proc

2538

1846

2539

1847

2540

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

1848

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2541

1849

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

2542

2543

1850

def process_request(self, request, client_address):

2544

1851

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

2545

1852

2546

1853

This function creates a new pipe in self.pipe

2547

1854

"""

2548

1855

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2549

1856

2550

1857

proc = MultiprocessingMixIn.process_request(self, request,

2551

1858

client_address)

2552

1859

self.child_pipe.close()

2553

1860

self.add_pipe(parent_pipe, proc)

2554

1861

2555

1862

def add_pipe(self, parent_pipe, proc):

2556

1863

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

2557

raise NotImplementedError()

1864

raise NotImplementedError

2558

1865

2559

1866

2560

1867

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2561

socketserver.TCPServer):

1868

socketserver.TCPServer, object):

2562

1869

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

2563

1870

2564

1871

Attributes:

2565

1872

enabled: Boolean; whether this server is activated yet

2566

1873

interface: None or a network interface name (string)

2567

1874

use_ipv6: Boolean; to use IPv6 or not

2568

1875

"""

2569

2570

1876

def __init__(self, server_address, RequestHandlerClass,

2571

interface=None,

2572

use_ipv6=True,

2573

socketfd=None):

2574

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

2575

creating a new one with socket.socket().

2576

"""

1877

interface=None, use_ipv6=True):

2577

1878

self.interface = interface

2578

1879

if use_ipv6:

2579

1880

self.address_family = socket.AF_INET6

2580

if socketfd is not None:

2581

# Save the file descriptor

2582

self.socketfd = socketfd

2583

# Save the original socket.socket() function

2584

self.socket_socket = socket.socket

2585

2586

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

2587

#

2588

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

2589

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

2590

# patching socket.socket.)

2591

#

2592

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

2593

@functools.wraps(socket.socket)

2594

def socket_wrapper(*args, **kwargs):

2595

# Restore original function so subsequent calls are

2596

# not affected.

2597

socket.socket = self.socket_socket

2598

del self.socket_socket

2599

# This time only, return a new socket object from the

2600

# saved file descriptor.

2601

return socket.fromfd(self.socketfd, *args, **kwargs)

2602

# Replace socket.socket() function with wrapper

2603

socket.socket = socket_wrapper

2604

# The socketserver.TCPServer.__init__ will call

2605

# socket.socket(), which might be our replacement,

2606

# socket_wrapper(), if socketfd was set.

2607

1881

socketserver.TCPServer.__init__(self, server_address,

2608

1882

RequestHandlerClass)

2609

2610

1883

def server_bind(self):

2611

1884

"""This overrides the normal server_bind() function

2612

1885

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

2613

1886

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

2614

global SO_BINDTODEVICE

2615

1887

if self.interface is not None:

2616

1888

if SO_BINDTODEVICE is None:

2617

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

2618

# common enough.

2619

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

2620

SO_BINDTODEVICE = 25

2621

try:

2622

self.socket.setsockopt(

2623

socket.SOL_SOCKET, SO_BINDTODEVICE,

2624

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

2625

except socket.error as error:

2626

if error.errno == errno.EPERM:

2627

logger.error("No permission to bind to"

2628

" interface %s", self.interface)

2629

elif error.errno == errno.ENOPROTOOPT:

2630

logger.error("SO_BINDTODEVICE not available;"

2631

" cannot bind to interface %s",

2632

self.interface)

2633

elif error.errno == errno.ENODEV:

2634

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

2635

" cannot bind", self.interface)

2636

else:

2637

raise

1889

logger.error("SO_BINDTODEVICE does not exist;"

1890

" cannot bind to interface %s",

1891

self.interface)

1892

else:

1893

try:

1894

self.socket.setsockopt(socket.SOL_SOCKET,

1895

SO_BINDTODEVICE,

1896

str(self.interface

1897

+ '\0'))

1898

except socket.error as error:

1899

if error[0] == errno.EPERM:

1900

logger.error("No permission to"

1901

" bind to interface %s",

1902

self.interface)

1903

elif error[0] == errno.ENOPROTOOPT:

1904

logger.error("SO_BINDTODEVICE not available;"

1905

" cannot bind to interface %s",

1906

self.interface)

1907

else:

1908

raise

2638

1909

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

2639

1910

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

2640

if self.server_address[1]:

2641

self.allow_reuse_address = True

2642

1911

if not self.server_address[0]:

2643

1912

if self.address_family == socket.AF_INET6:

2644

any_address = "::" # in6addr_any

1913

any_address = "::" # in6addr_any

2645

1914

else:

2646

any_address = "0.0.0.0" # INADDR_ANY

1915

any_address = socket.INADDR_ANY

2647

1916

self.server_address = (any_address,

2648

1917

self.server_address[1])

2649

1918

elif not self.server_address[1]:

2650

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

1919

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

1920

0)

2651

1921

# if self.interface:

2652

1922

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

2653

1923

# 0, # port

2659

1929

2660

1930

class MandosServer(IPv6_TCPServer):

2661

1931

"""Mandos server.

2662

1932

2663

1933

Attributes:

2664

1934

clients: set of Client objects

2665

1935

gnutls_priority GnuTLS priority string

2666

1936

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

2667

2668

Assumes a GLib.MainLoop event loop.

1937

1938

Assumes a gobject.MainLoop event loop.

2669

1939

"""

2670

2671

1940

def __init__(self, server_address, RequestHandlerClass,

2672

interface=None,

2673

use_ipv6=True,

2674

clients=None,

2675

gnutls_priority=None,

2676

use_dbus=True,

2677

socketfd=None):

1941

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

1942

gnutls_priority=None, use_dbus=True):

2678

1943

self.enabled = False

2679

1944

self.clients = clients

2680

1945

if self.clients is None:

2683

1948

self.gnutls_priority = gnutls_priority

2684

1949

IPv6_TCPServer.__init__(self, server_address,

2685

1950

RequestHandlerClass,

2686

interface=interface,

2687

use_ipv6=use_ipv6,

2688

socketfd=socketfd)

2689

1951

interface = interface,

1952

use_ipv6 = use_ipv6)

2690

1953

def server_activate(self):

2691

1954

if self.enabled:

2692

1955

return socketserver.TCPServer.server_activate(self)

2693

1956

2694

1957

def enable(self):

2695

1958

self.enabled = True

2696

1959

2697

1960

def add_pipe(self, parent_pipe, proc):

2698

1961

# Call "handle_ipc" for both data and EOF events

2699

GLib.io_add_watch(

2700

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

2701

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

2702

functools.partial(self.handle_ipc,

2703

parent_pipe=parent_pipe,

2704

proc=proc))

2705

2706

def handle_ipc(self, source, condition,

2707

parent_pipe=None,

2708

proc=None,

2709

client_object=None):

1962

gobject.io_add_watch(parent_pipe.fileno(),

1963

gobject.IO_IN | gobject.IO_HUP,

1964

functools.partial(self.handle_ipc,

1965

parent_pipe =

1966

parent_pipe,

1967

proc = proc))

1968

1969

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

1970

proc = None, client_object=None):

1971

condition_names = {

1972

gobject.IO_IN: "IN", # There is data to read.

1973

gobject.IO_OUT: "OUT", # Data can be written (without

1974

# blocking).

1975

gobject.IO_PRI: "PRI", # There is urgent data to read.

1976

gobject.IO_ERR: "ERR", # Error condition.

1977

gobject.IO_HUP: "HUP" # Hung up (the connection has been

1978

# broken, usually for pipes and

1979

# sockets).

1980

}

1981

conditions_string = ' | '.join(name

1982

for cond, name in

1983

condition_names.iteritems()

1984

if cond & condition)

2710

1985

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

2711

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

1986

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

2712

1987

# Wait for other process to exit

2713

1988

proc.join()

2714

1989

return False

2715

1990

2716

1991

# Read a request from the child

2717

1992

request = parent_pipe.recv()

2718

1993

command = request[0]

2719

1994

2720

1995

if command == 'init':

2721

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

2722

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

2723

address = request[3]

2724

2725

for c in self.clients.values():

2726

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2727

continue

2728

if key_id and c.key_id == key_id:

2729

client = c

2730

break

2731

if fpr and c.fingerprint == fpr:

1996

fpr = request[1]

1997

address = request[2]

1998

1999

for c in self.clients.itervalues():

2000

if c.fingerprint == fpr:

2732

2001

client = c

2733

2002

break

2734

2003

else:

2735

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

2736

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

2004

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

2005

"dress: %s", fpr, address)

2737

2006

if self.use_dbus:

2738

2007

# Emit D-Bus signal

2739

mandos_dbus_service.ClientNotFound(key_id or fpr,

2008

mandos_dbus_service.ClientNotFound(fpr,

2740

2009

address[0])

2741

2010

parent_pipe.send(False)

2742

2011

return False

2743

2744

GLib.io_add_watch(

2745

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

2746

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

2747

functools.partial(self.handle_ipc,

2748

parent_pipe=parent_pipe,

2749

proc=proc,

2750

client_object=client))

2012

2013

gobject.io_add_watch(parent_pipe.fileno(),

2014

gobject.IO_IN | gobject.IO_HUP,

2015

functools.partial(self.handle_ipc,

2016

parent_pipe =

2017

parent_pipe,

2018

proc = proc,

2019

client_object =

2020

client))

2751

2021

parent_pipe.send(True)

2752

2022

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

2753

2023

# same fileno

2756

2026

funcname = request[1]

2757

2027

args = request[2]

2758

2028

kwargs = request[3]

2759

2029

2760

2030

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

2761

2031

funcname)(*args,

2762

**kwargs)))

2763

2032

**kwargs)))

2033

2764

2034

if command == 'getattr':

2765

2035

attrname = request[1]

2766

if isinstance(client_object.__getattribute__(attrname),

2767

collections.abc.Callable):

2768

parent_pipe.send(('function', ))

2036

if callable(client_object.__getattribute__(attrname)):

2037

parent_pipe.send(('function',))

2769

2038

else:

2770

parent_pipe.send((

2771

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

2772

2039

parent_pipe.send(('data', client_object

2040

.__getattribute__(attrname)))

2041

2773

2042

if command == 'setattr':

2774

2043

attrname = request[1]

2775

2044

value = request[2]

2776

2045

setattr(client_object, attrname, value)

2777

2046

2778

2047

return True

2779

2048

2780

2049

2781

def rfc3339_duration_to_delta(duration):

2782

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

2783

2784

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

2785

True

2786

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

2787

True

2788

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

2789

True

2790

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

2791

True

2792

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

2793

True

2794

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

2795

True

2796

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

2797

True

2798

"""

2799

2800

# Parsing an RFC 3339 duration with regular expressions is not

2801

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

2802

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

2803

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

2804

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

2805

# avoid excessive use of external libraries.

2806

2807

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

2808

Token = collections.namedtuple("Token", (

2809

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

2810

# a "group" containing digits

2811

"value", # datetime.timedelta or None

2812

"followers")) # Tokens valid after this token

2813

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

2814

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

2815

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

2816

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

2817

datetime.timedelta(seconds=1),

2818

frozenset((token_end, )))

2819

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

2820

datetime.timedelta(minutes=1),

2821

frozenset((token_second, token_end)))

2822

token_hour = Token(re.compile(r"(\d+)H"),

2823

datetime.timedelta(hours=1),

2824

frozenset((token_minute, token_end)))

2825

token_time = Token(re.compile(r"T"),

2826

None,

2827

frozenset((token_hour, token_minute,

2828

token_second)))

2829

token_day = Token(re.compile(r"(\d+)D"),

2830

datetime.timedelta(days=1),

2831

frozenset((token_time, token_end)))

2832

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

2833

datetime.timedelta(weeks=4),

2834

frozenset((token_day, token_end)))

2835

token_year = Token(re.compile(r"(\d+)Y"),

2836

datetime.timedelta(weeks=52),

2837

frozenset((token_month, token_end)))

2838

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

2839

datetime.timedelta(weeks=1),

2840

frozenset((token_end, )))

2841

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

2842

frozenset((token_year, token_month,

2843

token_day, token_time,

2844

token_week)))

2845

# Define starting values:

2846

# Value so far

2847

value = datetime.timedelta()

2848

found_token = None

2849

# Following valid tokens

2850

followers = frozenset((token_duration, ))

2851

# String left to parse

2852

s = duration

2853

# Loop until end token is found

2854

while found_token is not token_end:

2855

# Search for any currently valid tokens

2856

for token in followers:

2857

match = token.regexp.match(s)

2858

if match is not None:

2859

# Token found

2860

if token.value is not None:

2861

# Value found, parse digits

2862

factor = int(match.group(1), 10)

2863

# Add to value so far

2864

value += factor * token.value

2865

# Strip token from string

2866

s = token.regexp.sub("", s, 1)

2867

# Go to found token

2868

found_token = token

2869

# Set valid next tokens

2870

followers = found_token.followers

2871

break

2872

else:

2873

# No currently valid tokens were found

2874

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

2875

.format(duration))

2876

# End token found

2877

return value

2878

2879

2880

2050

def string_to_delta(interval):

2881

2051

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

2882

2883

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

2884

True

2885

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

2886

True

2887

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

2888

True

2889

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

2890

True

2891

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

2892

True

2893

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

2894

True

2052

2053

>>> string_to_delta('7d')

2054

datetime.timedelta(7)

2055

>>> string_to_delta('60s')

2056

datetime.timedelta(0, 60)

2057

>>> string_to_delta('60m')

2058

datetime.timedelta(0, 3600)

2059

>>> string_to_delta('24h')

2060

datetime.timedelta(1)

2061

>>> string_to_delta('1w')

2062

datetime.timedelta(7)

2063

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

2064

datetime.timedelta(0, 330)

2895

2065

"""

2896

2897

try:

2898

return rfc3339_duration_to_delta(interval)

2899

except ValueError:

2900

pass

2901

2902

2066

timevalue = datetime.timedelta(0)

2903

2067

for s in interval.split():

2904

2068

try:

2905

suffix = s[-1]

2069

suffix = unicode(s[-1])

2906

2070

value = int(s[:-1])

2907

2071

if suffix == "d":

2908

2072

delta = datetime.timedelta(value)

2915

2079

elif suffix == "w":

2916

2080

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

2917

2081

else:

2918

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

2919

except IndexError as e:

2082

raise ValueError("Unknown suffix %r" % suffix)

2083

except (ValueError, IndexError) as e:

2920

2084

raise ValueError(*(e.args))

2921

2085

timevalue += delta

2922

2086

return timevalue

2923

2087

2924

2088

2925

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

2089

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

2926

2090

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

2927

2091

2928

2092

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

2929

2093

if os.fork():

2930

2094

sys.exit()

2938

2102

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

2939

2103

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

2940

2104

raise OSError(errno.ENODEV,

2941

"{} not a character device"

2942

.format(os.devnull))

2105

"%s not a character device"

2106

% os.devnull)

2943

2107

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

2944

2108

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

2945

2109

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

2948

2112

2949

2113

2950

2114

def main():

2951

2115

2952

2116

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

2953

2117

# Parsing of options, both command line and config file

2954

2118

2955

2119

parser = argparse.ArgumentParser()

2956

2120

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

2957

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

2121

version = "%%(prog)s %s" % version,

2958

2122

help="show version number and exit")

2959

2123

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

2960

2124

help="Bind to interface IF")

2966

2130

help="Run self-test")

2967

2131

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

2968

2132

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

2969

" to terminal", default=None)

2133

" to terminal")

2970

2134

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

2971

2135

help="Debug level for stdout output")

2972

2136

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

2979

2143

" files")

2980

2144

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

2981

2145

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

2982

" system bus interface", default=None)

2146

" system bus interface")

2983

2147

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

2984

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

2985

default=None)

2148

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

2986

2149

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

2987

2150

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

2988

" state", default=None)

2989

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

2990

help="Specify a file descriptor to a network"

2991

" socket to use instead of creating one")

2151

" state")

2992

2152

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

2993

2153

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

2994

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

2995

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

2996

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

2997

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

2998

default=None)

2999

2154

3000

2155

options = parser.parse_args()

3001

2156

2157

if options.check:

2158

import doctest

2159

doctest.testmod()

2160

sys.exit()

2161

3002

2162

# Default values for config file for server-global settings

3003

if gnutls.has_rawpk:

3004

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

3005

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

3006

else:

3007

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

3008

":+SIGN-DSA-SHA256")

3009

server_defaults = {"interface": "",

3010

"address": "",

3011

"port": "",

3012

"debug": "False",

3013

"priority": priority,

3014

"servicename": "Mandos",

3015

"use_dbus": "True",

3016

"use_ipv6": "True",

3017

"debuglevel": "",

3018

"restore": "True",

3019

"socket": "",

3020

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

3021

"foreground": "False",

3022

"zeroconf": "True",

3023

}

3024

del priority

3025

2163

server_defaults = { "interface": "",

2164

"address": "",

2165

"port": "",

2166

"debug": "False",

2167

"priority":

2168

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

2169

"servicename": "Mandos",

2170

"use_dbus": "True",

2171

"use_ipv6": "True",

2172

"debuglevel": "",

2173

"restore": "True",

2174

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

2175

}

2176

3026

2177

# Parse config file for server-global settings

3027

server_config = configparser.ConfigParser(server_defaults)

2178

server_config = configparser.SafeConfigParser(server_defaults)

3028

2179

del server_defaults

3029

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

3030

# Convert the ConfigParser object to a dict

2180

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

2181

"mandos.conf"))

2182

# Convert the SafeConfigParser object to a dict

3031

2183

server_settings = server_config.defaults()

3032

2184

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

3033

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

3034

"foreground", "zeroconf"):

2185

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

3035

2186

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

3036

2187

option)

3037

2188

if server_settings["port"]:

3038

2189

server_settings["port"] = server_config.getint("DEFAULT",

3039

2190

"port")

3040

if server_settings["socket"]:

3041

server_settings["socket"] = server_config.getint("DEFAULT",

3042

"socket")

3043

# Later, stdin will, and stdout and stderr might, be dup'ed

3044

# over with an opened os.devnull. But we don't want this to

3045

# happen with a supplied network socket.

3046

if 0 <= server_settings["socket"] <= 2:

3047

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

3048

["socket"])

3049

2191

del server_config

3050

2192

3051

2193

# Override the settings from the config file with command line

3052

2194

# options, if set.

3053

2195

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

3054

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

3055

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

3056

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

2196

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

2197

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

2198

"statedir"):

3057

2199

value = getattr(options, option)

3058

2200

if value is not None:

3059

2201

server_settings[option] = value

3060

2202

del options

3061

2203

# Force all strings to be unicode

3062

2204

for option in server_settings.keys():

3063

if isinstance(server_settings[option], bytes):

3064

server_settings[option] = (server_settings[option]

3065

.decode("utf-8"))

3066

# Force all boolean options to be boolean

3067

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

3068

"foreground", "zeroconf"):

3069

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

3070

# Debug implies foreground

3071

if server_settings["debug"]:

3072

server_settings["foreground"] = True

2205

if type(server_settings[option]) is str:

2206

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

3073

2207

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

3074

2208

3075

2209

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

3076

3077

if (not server_settings["zeroconf"]

3078

and not (server_settings["port"]

3079

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

3080

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

3081

2210

3082

2211

# For convenience

3083

2212

debug = server_settings["debug"]

3084

2213

debuglevel = server_settings["debuglevel"]

3086

2215

use_ipv6 = server_settings["use_ipv6"]

3087

2216

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

3088

2217

stored_state_file)

3089

foreground = server_settings["foreground"]

3090

zeroconf = server_settings["zeroconf"]

3091

2218

3092

2219

if debug:

3093

2220

initlogger(debug, logging.DEBUG)

3094

2221

else:

3097

2224

else:

3098

2225

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

3099

2226

initlogger(debug, level)

3100

2227

3101

2228

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

3102

syslogger.setFormatter(

3103

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

3104

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

3105

server_settings["servicename"])))

3106

2229

syslogger.setFormatter(logging.Formatter

2230

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

2231

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

2232

% server_settings["servicename"]))

2233

3107

2234

# Parse config file with clients

3108

client_config = configparser.ConfigParser(Client.client_defaults)

2235

client_config = configparser.SafeConfigParser(Client

2236

.client_defaults)

3109

2237

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

3110

2238

"clients.conf"))

3111

2239

3112

2240

global mandos_dbus_service

3113

2241

mandos_dbus_service = None

3114

3115

socketfd = None

3116

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

3117

socketfd = server_settings["socket"]

3118

tcp_server = MandosServer(

3119

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

3120

ClientHandler,

3121

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

3122

use_ipv6=use_ipv6,

3123

gnutls_priority=server_settings["priority"],

3124

use_dbus=use_dbus,

3125

socketfd=socketfd)

3126

if not foreground:

3127

pidfilename = "/run/mandos.pid"

3128

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

3129

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

3130

pidfile = None

3131

try:

3132

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

3133

except IOError as e:

3134

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

3135

exc_info=e)

3136

3137

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

3138

("mandos", "mandos"),

3139

("nobody", "nogroup")):

3140

try:

3141

uid = pwd.getpwnam(name).pw_uid

3142

gid = pwd.getpwnam(group).pw_gid

3143

break

2242

2243

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

2244

server_settings["port"]),

2245

ClientHandler,

2246

interface=(server_settings["interface"]

2247

or None),

2248

use_ipv6=use_ipv6,

2249

gnutls_priority=

2250

server_settings["priority"],

2251

use_dbus=use_dbus)

2252

if not debug:

2253

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

2254

try:

2255

pidfile = open(pidfilename, "w")

2256

except IOError:

2257

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

2258

2259

try:

2260

uid = pwd.getpwnam("_mandos").pw_uid

2261

gid = pwd.getpwnam("_mandos").pw_gid

2262

except KeyError:

2263

try:

2264

uid = pwd.getpwnam("mandos").pw_uid

2265

gid = pwd.getpwnam("mandos").pw_gid

3144

2266

except KeyError:

3145

continue

3146

else:

3147

uid = 65534

3148

gid = 65534

2267

try:

2268

uid = pwd.getpwnam("nobody").pw_uid

2269

gid = pwd.getpwnam("nobody").pw_gid

2270

except KeyError:

2271

uid = 65534

2272

gid = 65534

3149

2273

try:

3150

2274

os.setgid(gid)

3151

2275

os.setuid(uid)

3152

if debug:

3153

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

3154

gid))

3155

2276

except OSError as error:

3156

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

3157

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

3158

if error.errno != errno.EPERM:

3159

raise

3160

2277

if error[0] != errno.EPERM:

2278

raise error

2279

3161

2280

if debug:

3162

2281

# Enable all possible GnuTLS debugging

3163

2282

3164

2283

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

3165

2284

# - GnuTLS manual

3166

gnutls.global_set_log_level(11)

3167

3168

@gnutls.log_func

2285

gnutls.library.functions.gnutls_global_set_log_level(11)

2286

2287

@gnutls.library.types.gnutls_log_func

3169

2288

def debug_gnutls(level, string):

3170

2289

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

3171

3172

gnutls.global_set_log_function(debug_gnutls)

3173

2290

2291

(gnutls.library.functions

2292

.gnutls_global_set_log_function(debug_gnutls))

2293

3174

2294

# Redirect stdin so all checkers get /dev/null

3175

2295

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

3176

2296

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

3177

2297

if null > 2:

3178

2298

os.close(null)

3179

2299

3180

2300

# Need to fork before connecting to D-Bus

3181

if not foreground:

2301

if not debug:

3182

2302

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

3183

2303

daemon()

3184

3185

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

3186

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

3187

# need to inform GLib that threads will be used.

3188

GLib.threads_init()

3189

2304

2305

gobject.threads_init()

2306

3190

2307

global main_loop

3191

2308

# From the Avahi example code

3192

2309

DBusGMainLoop(set_as_default=True)

3193

main_loop = GLib.MainLoop()

2310

main_loop = gobject.MainLoop()

3194

2311

bus = dbus.SystemBus()

3195

2312

# End of Avahi example code

3196

2313

if use_dbus:

3197

2314

try:

3198

2315

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

3199

bus,

3200

do_not_queue=True)

3201

old_bus_name = dbus.service.BusName(

3202

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

3203

do_not_queue=True)

3204

except dbus.exceptions.DBusException as e:

3205

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

2316

bus, do_not_queue=True)

2317

old_bus_name = (dbus.service.BusName

2318

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

2319

do_not_queue=True))

2320

except dbus.exceptions.NameExistsException as e:

2321

logger.error(unicode(e) + ", disabling D-Bus")

3206

2322

use_dbus = False

3207

2323

server_settings["use_dbus"] = False

3208

2324

tcp_server.use_dbus = False

3209

if zeroconf:

3210

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3211

service = AvahiServiceToSyslog(

3212

name=server_settings["servicename"],

3213

servicetype="_mandos._tcp",

3214

protocol=protocol,

3215

bus=bus)

3216

if server_settings["interface"]:

3217

service.interface = if_nametoindex(

3218

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

3219

2325

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2326

service = AvahiServiceToSyslog(name =

2327

server_settings["servicename"],

2328

servicetype = "_mandos._tcp",

2329

protocol = protocol, bus = bus)

2330

if server_settings["interface"]:

2331

service.interface = (if_nametoindex

2332

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

2333

3220

2334

global multiprocessing_manager

3221

2335

multiprocessing_manager = multiprocessing.Manager()

3222

2336

3223

2337

client_class = Client

3224

2338

if use_dbus:

3225

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

3226

2339

client_class = functools.partial(ClientDBusTransitional,

2340

bus = bus)

2341

3227

2342

client_settings = Client.config_parser(client_config)

3228

2343

old_client_settings = {}

3229

2344

clients_data = {}

3230

3231

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

3232

global wnull

3233

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

3234

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

3235

# mode

3236

if debug or not foreground:

3237

wnull.close()

3238

2345

3239

2346

# Get client data and settings from last running state.

3240

2347

if server_settings["restore"]:

3241

2348

try:

3242

2349

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

3243

if sys.version_info.major == 2:

3244

clients_data, old_client_settings = pickle.load(

3245

stored_state)

3246

else:

3247

bytes_clients_data, bytes_old_client_settings = (

3248

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

3249

# Fix bytes to strings

3250

# clients_data

3251

# .keys()

3252

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

3253

if isinstance(key, bytes)

3254

else key): value

3255

for key, value in

3256

bytes_clients_data.items()}

3257

del bytes_clients_data

3258

for key in clients_data:

3259

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

3260

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

3261

for k, v in

3262

clients_data[key].items()}

3263

clients_data[key] = value

3264

# .client_structure

3265

value["client_structure"] = [

3266

(s.decode("utf-8")

3267

if isinstance(s, bytes)

3268

else s) for s in

3269

value["client_structure"]]

3270

# .name, .host, and .checker_command

3271

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

3272

if isinstance(value[k], bytes):

3273

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

3274

if "key_id" not in value:

3275

value["key_id"] = ""

3276

elif "fingerprint" not in value:

3277

value["fingerprint"] = ""

3278

# old_client_settings

3279

# .keys()

3280

old_client_settings = {

3281

(key.decode("utf-8")

3282

if isinstance(key, bytes)

3283

else key): value

3284

for key, value in

3285

bytes_old_client_settings.items()}

3286

del bytes_old_client_settings

3287

# .host and .checker_command

3288

for value in old_client_settings.values():

3289

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

3290

if isinstance(value[attribute], bytes):

3291

value[attribute] = (value[attribute]

3292

.decode("utf-8"))

2350

clients_data, old_client_settings = (pickle.load

2351

(stored_state))

3293

2352

os.remove(stored_state_path)

3294

2353

except IOError as e:

3295

if e.errno == errno.ENOENT:

3296

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

3297

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

3298

else:

3299

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

3300

exc_info=e)

2354

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

2355

.format(e))

2356

if e.errno != errno.ENOENT:

3301

2357

raise

3302

2358

except EOFError as e:

3303

2359

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

3304

"EOFError:",

3305

exc_info=e)

3306

2360

"EOFError: {0}".format(e))

2361

3307

2362

with PGPEngine() as pgp:

3308

for client_name, client in clients_data.items():

3309

# Skip removed clients

3310

if client_name not in client_settings:

3311

continue

3312

2363

for client_name, client in clients_data.iteritems():

3313

2364

# Decide which value to use after restoring saved state.

3314

2365

# We have three different values: Old config file,

3315

2366

# new config file, and saved state.

3320

2371

# For each value in new config, check if it

3321

2372

# differs from the old config value (Except for

3322

2373

# the "secret" attribute)

3323

if (name != "secret"

3324

and (value !=

3325

old_client_settings[client_name][name])):

2374

if (name != "secret" and

2375

value != old_client_settings[client_name]

2376

[name]):

3326

2377

client[name] = value

3327

2378

except KeyError:

3328

2379

pass

3329

2380

3330

2381

# Clients who has passed its expire date can still be

3331

# enabled if its last checker was successful. A Client

2382

# enabled if its last checker was successful. Clients

3332

2383

# whose checker succeeded before we stored its state is

3333

2384

# assumed to have successfully run all checkers during

3334

2385

# downtime.

3336

2387

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

3337

2388

if not client["last_checked_ok"]:

3338

2389

logger.warning(

3339

"disabling client {} - Client never "

3340

"performed a successful checker".format(

3341

client_name))

2390

"disabling client {0} - Client never "

2391

"performed a successful checker"

2392

.format(client_name))

3342

2393

client["enabled"] = False

3343

2394

elif client["last_checker_status"] != 0:

3344

2395

logger.warning(

3345

"disabling client {} - Client last"

3346

" checker failed with error code"

3347

" {}".format(

3348

client_name,

3349

client["last_checker_status"]))

2396

"disabling client {0} - Client "

2397

"last checker failed with error code {1}"

2398

.format(client_name,

2399

client["last_checker_status"]))

3350

2400

client["enabled"] = False

3351

2401

else:

3352

client["expires"] = (

3353

datetime.datetime.utcnow()

3354

+ client["timeout"])

2402

client["expires"] = (datetime.datetime

2403

.utcnow()

2404

+ client["timeout"])

3355

2405

logger.debug("Last checker succeeded,"

3356

" keeping {} enabled".format(

3357

client_name))

2406

" keeping {0} enabled"

2407

.format(client_name))

3358

2408

try:

3359

client["secret"] = pgp.decrypt(

3360

client["encrypted_secret"],

3361

client_settings[client_name]["secret"])

2409

client["secret"] = (

2410

pgp.decrypt(client["encrypted_secret"],

2411

client_settings[client_name]

2412

["secret"]))

3362

2413

except PGPError:

3363

2414

# If decryption fails, we use secret from new settings

3364

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

3365

client_name))

3366

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

3367

["secret"])

2415

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

2416

.format(client_name))

2417

client["secret"] = (

2418

client_settings[client_name]["secret"])

3368

2419

2420

3369

2421

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

3370

2422

for client_name in (set(old_client_settings)

3371

2423

- set(client_settings)):

3375

2427

clients_data[client_name] = client_settings[client_name]

3376

2428

3377

2429

# Create all client objects

3378

for client_name, client in clients_data.items():

2430

for client_name, client in clients_data.iteritems():

3379

2431

tcp_server.clients[client_name] = client_class(

3380

name=client_name,

3381

settings=client,

3382

server_settings=server_settings)

3383

2432

name = client_name, settings = client)

2433

3384

2434

if not tcp_server.clients:

3385

2435

logger.warning("No clients defined")

3386

3387

if not foreground:

3388

if pidfile is not None:

3389

pid = os.getpid()

3390

try:

3391

with pidfile:

3392

print(pid, file=pidfile)

3393

except IOError:

3394

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

3395

pidfilename, pid)

3396

del pidfile

2436

2437

if not debug:

2438

try:

2439

with pidfile:

2440

pid = os.getpid()

2441

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

2442

del pidfile

2443

except IOError:

2444

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

2445

pidfilename, pid)

2446

except NameError:

2447

# "pidfile" was never created

2448

pass

3397

2449

del pidfilename

3398

3399

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

3400

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3401

lambda: main_loop.quit() and False)

3402

2450

signal.signal(signal.SIGINT, signal.SIG_IGN)

2451

2452

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

2453

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

2454

3403

2455

if use_dbus:

3404

3405

@alternate_dbus_interfaces(

3406

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

3407

class MandosDBusService(DBusObjectWithObjectManager):

2456

class MandosDBusService(DBusObjectWithProperties):

3408

2457

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

3409

3410

2458

def __init__(self):

3411

2459

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

3412

3413

2460

_interface = "se.recompile.Mandos"

3414

2461

2462

@dbus_interface_annotations(_interface)

2463

def _foo(self):

2464

return { "org.freedesktop.DBus.Property"

2465

".EmitsChangedSignal":

2466

"false"}

2467

3415

2468

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

3416

2469

def ClientAdded(self, objpath):

3417

2470

"D-Bus signal"

3418

2471

pass

3419

2472

3420

2473

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

3421

def ClientNotFound(self, key_id, address):

2474

def ClientNotFound(self, fingerprint, address):

3422

2475

"D-Bus signal"

3423

2476

pass

3424

3425

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

3426

"true"})

2477

3427

2478

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

3428

2479

def ClientRemoved(self, objpath, name):

3429

2480

"D-Bus signal"

3430

2481

pass

3431

3432

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

3433

"true"})

2482

3434

2483

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

3435

2484

def GetAllClients(self):

3436

2485

"D-Bus method"

3437

return dbus.Array(c.dbus_object_path for c in

3438

tcp_server.clients.values())

3439

3440

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

3441

"true"})

2486

return dbus.Array(c.dbus_object_path

2487

for c in

2488

tcp_server.clients.itervalues())

2489

3442

2490

@dbus.service.method(_interface,

3443

2491

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

3444

2492

def GetAllClientsWithProperties(self):

3445

2493

"D-Bus method"

3446

2494

return dbus.Dictionary(

3447

{c.dbus_object_path: c.GetAll(

3448

"se.recompile.Mandos.Client")

3449

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

2495

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

2496

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

3450

2497

signature="oa{sv}")

3451

2498

3452

2499

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

3453

2500

def RemoveClient(self, object_path):

3454

2501

"D-Bus method"

3455

for c in tcp_server.clients.values():

2502

for c in tcp_server.clients.itervalues():

3456

2503

if c.dbus_object_path == object_path:

3457

2504

del tcp_server.clients[c.name]

3458

2505

c.remove_from_connection()

3459

# Don't signal the disabling

2506

# Don't signal anything except ClientRemoved

3460

2507

c.disable(quiet=True)

3461

# Emit D-Bus signal for removal

3462

self.client_removed_signal(c)

2508

# Emit D-Bus signal

2509

self.ClientRemoved(object_path, c.name)

3463

2510

return

3464

2511

raise KeyError(object_path)

3465

2512

3466

2513

del _interface

3467

3468

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3469

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

3470

def GetManagedObjects(self):

3471

"""D-Bus method"""

3472

return dbus.Dictionary(

3473

{client.dbus_object_path:

3474

dbus.Dictionary(

3475

{interface: client.GetAll(interface)

3476

for interface in

3477

client._get_all_interface_names()})

3478

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

3479

3480

def client_added_signal(self, client):

3481

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

3482

if use_dbus:

3483

# New standard signal

3484

self.InterfacesAdded(

3485

client.dbus_object_path,

3486

dbus.Dictionary(

3487

{interface: client.GetAll(interface)

3488

for interface in

3489

client._get_all_interface_names()}))

3490

# Old signal

3491

self.ClientAdded(client.dbus_object_path)

3492

3493

def client_removed_signal(self, client):

3494

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

3495

if use_dbus:

3496

# New standard signal

3497

self.InterfacesRemoved(

3498

client.dbus_object_path,

3499

client._get_all_interface_names())

3500

# Old signal

3501

self.ClientRemoved(client.dbus_object_path,

3502

client.name)

3503

3504

mandos_dbus_service = MandosDBusService()

3505

3506

# Save modules to variables to exempt the modules from being

3507

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

3508

mp = multiprocessing

3509

wn = wnull

3510

2514

2515

class MandosDBusServiceTransitional(MandosDBusService):

2516

__metaclass__ = AlternateDBusNamesMetaclass

2517

mandos_dbus_service = MandosDBusServiceTransitional()

2518

3511

2519

def cleanup():

3512

2520

"Cleanup function; run on exit"

3513

if zeroconf:

3514

service.cleanup()

3515

3516

mp.active_children()

3517

wn.close()

2521

service.cleanup()

2522

2523

multiprocessing.active_children()

3518

2524

if not (tcp_server.clients or client_settings):

3519

2525

return

3520

2526

3521

2527

# Store client before exiting. Secrets are encrypted with key

3522

2528

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

3523

2529

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

3524

2530

clients = {}

3525

2531

with PGPEngine() as pgp:

3526

for client in tcp_server.clients.values():

2532

for client in tcp_server.clients.itervalues():

3527

2533

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

3528

2534

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

3529

2535

key)

3530

2536

client_dict = {}

3531

2537

3532

2538

# A list of attributes that can not be pickled

3533

2539

# + secret.

3534

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

3535

"checker", "server_settings"}

3536

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

3537

.Object):

2540

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

2541

"checker"))

2542

for name, typ in (inspect.getmembers

2543

(dbus.service.Object)):

3538

2544

exclude.add(name)

3539

2545

3540

2546

client_dict["encrypted_secret"] = (client

3541

2547

.encrypted_secret)

3542

2548

for attr in client.client_structure:

3543

2549

if attr not in exclude:

3544

2550

client_dict[attr] = getattr(client, attr)

3545

2551

3546

2552

clients[client.name] = client_dict

3547

2553

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

3548

2554

3549

2555

try:

3550

with tempfile.NamedTemporaryFile(

3551

mode='wb',

3552

suffix=".pickle",

3553

prefix='clients-',

3554

dir=os.path.dirname(stored_state_path),

3555

delete=False) as stored_state:

3556

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

3557

protocol=2)

3558

tempname = stored_state.name

2556

tempfd, tempname = tempfile.mkstemp(suffix=".pickle",

2557

prefix="clients-",

2558

dir=os.path.dirname

2559

(stored_state_path))

2560

with os.fdopen(tempfd, "wb") as stored_state:

2561

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

3559

2562

os.rename(tempname, stored_state_path)

3560

2563

except (IOError, OSError) as e:

2564

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

2565

.format(e))

3561

2566

if not debug:

3562

2567

try:

3563

2568

os.remove(tempname)

3564

2569

except NameError:

3565

2570

pass

3566

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

3567

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

3568

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

3569

else:

3570

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

3571

exc_info=e)

3572

raise

3573

2571

if e.errno not in set((errno.ENOENT, errno.EACCES,

2572

errno.EEXIST)):

2573

raise e

2574

3574

2575

# Delete all clients, and settings from config

3575

2576

while tcp_server.clients:

3576

2577

name, client = tcp_server.clients.popitem()

3577

2578

if use_dbus:

3578

2579

client.remove_from_connection()

3579

# Don't signal the disabling

2580

# Don't signal anything except ClientRemoved

3580

2581

client.disable(quiet=True)

3581

# Emit D-Bus signal for removal

3582

2582

if use_dbus:

3583

mandos_dbus_service.client_removed_signal(client)

2583

# Emit D-Bus signal

2584

mandos_dbus_service.ClientRemoved(client

2585

.dbus_object_path,

2586

client.name)

3584

2587

client_settings.clear()

3585

2588

3586

2589

atexit.register(cleanup)

3587

3588

for client in tcp_server.clients.values():

2590

2591

for client in tcp_server.clients.itervalues():

3589

2592

if use_dbus:

3590

# Emit D-Bus signal for adding

3591

mandos_dbus_service.client_added_signal(client)

2593

# Emit D-Bus signal

2594

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3592

2595

# Need to initiate checking of clients

3593

2596

if client.enabled:

3594

2597

client.init_checker()

3595

2598

3596

2599

tcp_server.enable()

3597

2600

tcp_server.server_activate()

3598

2601

3599

2602

# Find out what port we got

3600

if zeroconf:

3601

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

2603

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

3602

2604

if use_ipv6:

3603

2605

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

3604

" flowinfo %d, scope_id %d",

3605

*tcp_server.socket.getsockname())

2606

" flowinfo %d, scope_id %d"

2607

% tcp_server.socket.getsockname())

3606

2608

else: # IPv4

3607

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

3608

*tcp_server.socket.getsockname())

3609

3610

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

3611

2609

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

2610

% tcp_server.socket.getsockname())

2611

2612

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

2613

3612

2614

try:

3613

if zeroconf:

3614

# From the Avahi example code

3615

try:

3616

service.activate()

3617

except dbus.exceptions.DBusException as error:

3618

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

3619

cleanup()

3620

sys.exit(1)

3621

# End of Avahi example code

3622

3623

GLib.io_add_watch(

3624

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

3625

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

3626

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

3627

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

3628

2615

# From the Avahi example code

2616

try:

2617

service.activate()

2618

except dbus.exceptions.DBusException as error:

2619

logger.critical("DBusException: %s", error)

2620

cleanup()

2621

sys.exit(1)

2622

# End of Avahi example code

2623

2624

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

2625

lambda *args, **kwargs:

2626

(tcp_server.handle_request

2627

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

2628

3629

2629

logger.debug("Starting main loop")

3630

2630

main_loop.run()

3631

2631

except AvahiError as error:

3632

logger.critical("Avahi Error", exc_info=error)

2632

logger.critical("AvahiError: %s", error)

3633

2633

cleanup()

3634

2634

sys.exit(1)

3635

2635

except KeyboardInterrupt:

3640

2640

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

3641

2641

cleanup()

3642

2642

3643

3644

def should_only_run_tests():

3645

parser = argparse.ArgumentParser(add_help=False)

3646

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

3647

args, unknown_args = parser.parse_known_args()

3648

run_tests = args.check

3649

if run_tests:

3650

# Remove --check argument from sys.argv

3651

sys.argv[1:] = unknown_args

3652

return run_tests

3653

3654

# Add all tests from doctest strings

3655

def load_tests(loader, tests, none):

3656

import doctest

3657

tests.addTests(doctest.DocTestSuite())

3658

return tests

3659

3660

2643

if __name__ == '__main__':

3661

try:

3662

if should_only_run_tests():

3663

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

3664

unittest.main()

3665

else:

3666

main()

3667

finally:

3668

logging.shutdown()

2644

main()