/mandos/release : revision 237.7.802

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#!/usr/bin/python

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

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#

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#!/usr/bin/python3 -bI

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

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#

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

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#

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#

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

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# service publisher, downloaded from

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

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

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

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

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#

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#

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# Everything else is

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#

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

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

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#

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# This file is part of Mandos.

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#

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

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

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

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# (at your option) any later version.

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#

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

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

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

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# WITHOUT ANY WARRANTY; without even the implied warranty of

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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# GNU General Public License for more details.

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#

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#

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

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# along with this program. If not, see

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

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#

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

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#

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

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#

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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try:

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from future_builtins import *

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except ImportError:

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pass

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import SocketServer as socketserver

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try:

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import SocketServer as socketserver

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except ImportError:

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import socketserver

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import socket

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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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import ConfigParser as configparser

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try:

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import ConfigParser as configparser

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except ImportError:

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import configparser

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import sys

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import re

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import os

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66

import struct

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import fcntl

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import functools

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import cPickle as pickle

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try:

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import cPickle as pickle

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except ImportError:

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import pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import codecs

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import unittest

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import random

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import shlex

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import dbus

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import dbus.service

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import gobject

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import avahi

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import gi

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from gi.repository import GLib

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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try:

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if sys.version_info.major == 2:

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__metaclass__ = type

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str = unicode

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98

# 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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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except AttributeError:

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try:

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# This is where SO_BINDTODEVICE was up to and including Python

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# 2.6, and also 3.2:

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from IN import SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.6.2"

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

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# Try running the C preprocessor:

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try:

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

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"/dev/stdin"],

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE)

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stdout = cc.communicate(

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

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

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except (OSError, ValueError, IndexError):

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# No value found

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SO_BINDTODEVICE = None

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if sys.version_info < (3, 2):

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configparser.Configparser = configparser.SafeConfigParser

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version = "1.8.14"

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stored_state_file = "clients.pickle"

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148

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logger = logging.getLogger()

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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log = logging.getLogger(os.path.basename(sys.argv[0]))

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

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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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

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

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return interface_index

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166

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167

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def copy_function(func):

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

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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183

116

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility=logging.handlers.SysLogHandler.LOG_DAEMON,

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address="/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

123

192

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

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" %(message)s"))

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log.addHandler(syslogger)

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124

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if debug:

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197

console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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

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" [%(process)d]:"

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" %(levelname)s:"

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" %(message)s"))

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log.addHandler(console)

203

log.setLevel(level)

132

204

133

205

134

206

class PGPError(Exception):

136

208

pass

137

209

138

210

139

class PGPEngine(object):

211

class PGPEngine:

140

212

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

213

141

214

def __init__(self):

142

215

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

143

self.gnupgargs = ['--batch',

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'--home', self.tempdir,

145

'--force-mdc',

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'--quiet',

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'--no-use-agent']

148

216

self.gpg = "gpg"

217

try:

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

219

for line in output.splitlines():

220

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

221

if name == b"gpg":

222

self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ["--batch",

228

"--homedir", self.tempdir,

229

"--force-mdc",

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"--quiet"]

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# 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

149

235

def __enter__(self):

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236

return self

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237

152

238

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

153

239

self._cleanup()

154

240

return False

155

241

156

242

def __del__(self):

157

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self._cleanup()

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244

159

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def _cleanup(self):

160

246

if self.tempdir is not None:

161

247

# Delete contents of tempdir

162

248

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

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topdown = False):

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topdown=False):

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for filename in files:

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

166

252

for dirname in dirs:

168

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# Remove tempdir

169

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os.rmdir(self.tempdir)

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self.tempdir = None

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257

172

258

def password_encode(self, password):

173

259

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

174

260

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

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

180

266

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

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267

return encoded

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268

183

269

def encrypt(self, data, password):

184

270

passphrase = self.password_encode(password)

185

with tempfile.NamedTemporaryFile(dir=self.tempdir

186

) as passfile:

271

with tempfile.NamedTemporaryFile(

272

dir=self.tempdir) as passfile:

187

273

passfile.write(passphrase)

188

274

passfile.flush()

189

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

190

'--passphrase-file',

275

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

276

"--passphrase-file",

191

277

passfile.name]

192

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

194

stdout = subprocess.PIPE,

195

stderr = subprocess.PIPE)

196

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

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stdin=subprocess.PIPE,

280

stdout=subprocess.PIPE,

281

stderr=subprocess.PIPE)

282

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

197

283

if proc.returncode != 0:

198

284

raise PGPError(err)

199

285

return ciphertext

200

286

201

287

def decrypt(self, data, password):

202

288

passphrase = self.password_encode(password)

203

with tempfile.NamedTemporaryFile(dir = self.tempdir

204

) as passfile:

289

with tempfile.NamedTemporaryFile(

290

dir=self.tempdir) as passfile:

205

291

passfile.write(passphrase)

206

292

passfile.flush()

207

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

208

'--passphrase-file',

293

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

294

"--passphrase-file",

209

295

passfile.name]

210

296

+ self.gnupgargs,

211

stdin = subprocess.PIPE,

212

stdout = subprocess.PIPE,

213

stderr = subprocess.PIPE)

214

decrypted_plaintext, err = proc.communicate(input

215

= data)

297

stdin=subprocess.PIPE,

298

stdout=subprocess.PIPE,

299

stderr=subprocess.PIPE)

300

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

216

301

if proc.returncode != 0:

217

302

raise PGPError(err)

218

303

return decrypted_plaintext

219

304

220

305

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

221

332

class AvahiError(Exception):

222

333

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

223

334

self.value = value

224

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

225

def __unicode__(self):

226

return unicode(repr(self.value))

335

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

336

**kwargs)

337

227

338

228

339

class AvahiServiceError(AvahiError):

229

340

pass

230

341

342

231

343

class AvahiGroupError(AvahiError):

232

344

pass

233

345

234

346

235

class AvahiService(object):

347

class AvahiService:

236

348

"""An Avahi (Zeroconf) service.

237

349

238

350

Attributes:

239

351

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

240

352

Used to optionally bind to the specified interface.

241

242

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

353

354

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

243

355

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

244

356

port: integer; what port to announce

245

357

TXT: list of strings; TXT record for the service

252

364

server: D-Bus Server

253

365

bus: dbus.SystemBus()

254

366

"""

255

256

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

257

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

258

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

259

protocol = avahi.PROTO_UNSPEC, bus = None):

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):

260

379

self.interface = interface

261

380

self.name = name

262

381

self.type = servicetype

271

390

self.server = None

272

391

self.bus = bus

273

392

self.entry_group_state_changed_match = None

274

275

def rename(self):

393

394

def rename(self, remove=True):

276

395

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

277

396

if self.rename_count >= self.max_renames:

278

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

279

" after %i retries, exiting.",

280

self.rename_count)

397

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

398

" after %i retries, exiting.",

399

self.rename_count)

281

400

raise AvahiServiceError("Too many renames")

282

self.name = unicode(self.server

283

.GetAlternativeServiceName(self.name))

284

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

285

self.name)

286

self.remove()

287

try:

288

self.add()

289

except dbus.exceptions.DBusException as error:

290

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

291

self.cleanup()

292

os._exit(1)

401

self.name = str(

402

self.server.GetAlternativeServiceName(self.name))

293

403

self.rename_count += 1

294

404

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

405

self.name)

406

if remove:

407

self.remove()

408

try:

409

self.add()

410

except dbus.exceptions.DBusException as error:

411

if (error.get_dbus_name()

412

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

413

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

414

return self.rename(remove=False)

415

else:

416

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

417

self.cleanup()

418

os._exit(1)

419

295

420

def remove(self):

296

421

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

297

422

if self.entry_group_state_changed_match is not None:

299

424

self.entry_group_state_changed_match = None

300

425

if self.group is not None:

301

426

self.group.Reset()

302

427

303

428

def add(self):

304

429

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

305

430

self.remove()

310

435

avahi.DBUS_INTERFACE_ENTRY_GROUP)

311

436

self.entry_group_state_changed_match = (

312

437

self.group.connect_to_signal(

313

'StateChanged', self.entry_group_state_changed))

314

logger.debug("Adding Zeroconf service '%s' of type '%s' ...",

315

self.name, self.type)

438

"StateChanged", self.entry_group_state_changed))

439

log.debug("Adding Zeroconf service '%s' of type '%s' ...",

440

self.name, self.type)

316

441

self.group.AddService(

317

442

self.interface,

318

443

self.protocol,

322

447

dbus.UInt16(self.port),

323

448

avahi.string_array_to_txt_array(self.TXT))

324

449

self.group.Commit()

325

450

326

451

def entry_group_state_changed(self, state, error):

327

452

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

328

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

329

453

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

454

330

455

if state == avahi.ENTRY_GROUP_ESTABLISHED:

331

logger.debug("Zeroconf service established.")

456

log.debug("Zeroconf service established.")

332

457

elif state == avahi.ENTRY_GROUP_COLLISION:

333

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

458

log.info("Zeroconf service name collision.")

334

459

self.rename()

335

460

elif state == avahi.ENTRY_GROUP_FAILURE:

336

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

337

unicode(error))

338

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

339

.format(error))

340

461

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

462

str(error))

463

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

464

341

465

def cleanup(self):

342

466

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

343

467

if self.group is not None:

348

472

pass

349

473

self.group = None

350

474

self.remove()

351

475

352

476

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

353

477

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

354

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

355

bad_states = { avahi.SERVER_INVALID:

356

"Zeroconf server invalid",

357

avahi.SERVER_REGISTERING: None,

358

avahi.SERVER_COLLISION:

359

"Zeroconf server name collision",

360

avahi.SERVER_FAILURE:

361

"Zeroconf server failure" }

478

log.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

}

362

485

if state in bad_states:

363

486

if bad_states[state] is not None:

364

487

if error is None:

365

logger.error(bad_states[state])

488

log.error(bad_states[state])

366

489

else:

367

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

490

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

368

491

self.cleanup()

369

492

elif state == avahi.SERVER_RUNNING:

370

self.add()

493

try:

494

self.add()

495

except dbus.exceptions.DBusException as error:

496

if (error.get_dbus_name()

497

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

498

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

499

return self.rename(remove=False)

500

else:

501

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

502

self.cleanup()

503

os._exit(1)

371

504

else:

372

505

if error is None:

373

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

506

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

374

507

else:

375

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

376

508

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

509

377

510

def activate(self):

378

511

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

379

512

if self.server is None:

383

516

follow_name_owner_changes=True),

384

517

avahi.DBUS_INTERFACE_SERVER)

385

518

self.server.connect_to_signal("StateChanged",

386

self.server_state_changed)

519

self.server_state_changed)

387

520

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

388

521

389

522

390

523

class AvahiServiceToSyslog(AvahiService):

391

def rename(self):

524

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

392

525

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

393

ret = AvahiService.rename(self)

394

syslogger.setFormatter(logging.Formatter

395

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

396

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

397

.format(self.name)))

526

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

527

**kwargs)

528

syslogger.setFormatter(logging.Formatter(

529

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

530

.format(self.name)))

398

531

return ret

399

532

400

533

401

def timedelta_to_milliseconds(td):

402

"Convert a datetime.timedelta() to milliseconds"

403

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

404

+ (td.seconds * 1000)

405

+ (td.microseconds // 1000))

406

407

408

class Client(object):

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).decode(

597

"utf-8", errors="replace")

598

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

599

message, *args)

600

601

class CertificateSecurityError(Error):

602

pass

603

604

class PointerTo:

605

def __init__(self, cls):

606

self.cls = cls

607

608

def from_param(self, obj):

609

if not isinstance(obj, self.cls):

610

raise TypeError("Not of type {}: {!r}"

611

.format(self.cls.__name__, obj))

612

return ctypes.byref(obj.from_param(obj))

613

614

class CastToVoidPointer:

615

def __init__(self, cls):

616

self.cls = cls

617

618

def from_param(self, obj):

619

if not isinstance(obj, self.cls):

620

raise TypeError("Not of type {}: {!r}"

621

.format(self.cls.__name__, obj))

622

return ctypes.cast(obj.from_param(obj), ctypes.c_void_p)

623

624

class With_from_param:

625

@classmethod

626

def from_param(cls, obj):

627

return obj._as_parameter_

628

629

# Classes

630

class Credentials(With_from_param):

631

def __init__(self):

632

self._as_parameter_ = gnutls.certificate_credentials_t()

633

gnutls.certificate_allocate_credentials(self)

634

self.type = gnutls.CRD_CERTIFICATE

635

636

def __del__(self):

637

gnutls.certificate_free_credentials(self)

638

639

class ClientSession(With_from_param):

640

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

641

self._as_parameter_ = gnutls.session_t()

642

gnutls_flags = gnutls.CLIENT

643

if gnutls.check_version(b"3.5.6"):

644

gnutls_flags |= gnutls.NO_TICKETS

645

if gnutls.has_rawpk:

646

gnutls_flags |= gnutls.ENABLE_RAWPK

647

gnutls.init(self, gnutls_flags)

648

del gnutls_flags

649

gnutls.set_default_priority(self)

650

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

651

gnutls.handshake_set_private_extensions(self, True)

652

self.socket = socket

653

if credentials is None:

654

credentials = gnutls.Credentials()

655

gnutls.credentials_set(self, credentials.type,

656

credentials)

657

self.credentials = credentials

658

659

def __del__(self):

660

gnutls.deinit(self)

661

662

def handshake(self):

663

return gnutls.handshake(self)

664

665

def send(self, data):

666

data = bytes(data)

667

data_len = len(data)

668

while data_len > 0:

669

data_len -= gnutls.record_send(self, data[-data_len:],

670

data_len)

671

672

def bye(self):

673

return gnutls.bye(self, gnutls.SHUT_RDWR)

674

675

# Error handling functions

676

def _error_code(result):

677

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

678

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

679

if result >= gnutls.E_SUCCESS:

680

return result

681

if result == gnutls.E_NO_CERTIFICATE_FOUND:

682

raise gnutls.CertificateSecurityError(code=result)

683

raise gnutls.Error(code=result)

684

685

def _retry_on_error(result, func, arguments,

686

_error_code=_error_code):

687

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

688

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

689

while result < gnutls.E_SUCCESS:

690

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

691

return _error_code(result)

692

result = func(*arguments)

693

return result

694

695

# Unless otherwise indicated, the function declarations below are

696

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

697

698

# Functions

699

priority_set_direct = _library.gnutls_priority_set_direct

700

priority_set_direct.argtypes = [ClientSession, ctypes.c_char_p,

701

ctypes.POINTER(ctypes.c_char_p)]

702

priority_set_direct.restype = _error_code

703

704

init = _library.gnutls_init

705

init.argtypes = [PointerTo(ClientSession), ctypes.c_int]

706

init.restype = _error_code

707

708

set_default_priority = _library.gnutls_set_default_priority

709

set_default_priority.argtypes = [ClientSession]

710

set_default_priority.restype = _error_code

711

712

record_send = _library.gnutls_record_send

713

record_send.argtypes = [ClientSession, ctypes.c_void_p,

714

ctypes.c_size_t]

715

record_send.restype = ctypes.c_ssize_t

716

record_send.errcheck = _retry_on_error

717

718

certificate_allocate_credentials = (

719

_library.gnutls_certificate_allocate_credentials)

720

certificate_allocate_credentials.argtypes = [

721

PointerTo(Credentials)]

722

certificate_allocate_credentials.restype = _error_code

723

724

certificate_free_credentials = (

725

_library.gnutls_certificate_free_credentials)

726

certificate_free_credentials.argtypes = [Credentials]

727

certificate_free_credentials.restype = None

728

729

handshake_set_private_extensions = (

730

_library.gnutls_handshake_set_private_extensions)

731

handshake_set_private_extensions.argtypes = [ClientSession,

732

ctypes.c_int]

733

handshake_set_private_extensions.restype = None

734

735

credentials_set = _library.gnutls_credentials_set

736

credentials_set.argtypes = [ClientSession, credentials_type_t,

737

CastToVoidPointer(Credentials)]

738

credentials_set.restype = _error_code

739

740

strerror = _library.gnutls_strerror

741

strerror.argtypes = [ctypes.c_int]

742

strerror.restype = ctypes.c_char_p

743

744

certificate_type_get = _library.gnutls_certificate_type_get

745

certificate_type_get.argtypes = [ClientSession]

746

certificate_type_get.restype = _error_code

747

748

certificate_get_peers = _library.gnutls_certificate_get_peers

749

certificate_get_peers.argtypes = [ClientSession,

750

ctypes.POINTER(ctypes.c_uint)]

751

certificate_get_peers.restype = ctypes.POINTER(datum_t)

752

753

global_set_log_level = _library.gnutls_global_set_log_level

754

global_set_log_level.argtypes = [ctypes.c_int]

755

global_set_log_level.restype = None

756

757

global_set_log_function = _library.gnutls_global_set_log_function

758

global_set_log_function.argtypes = [log_func]

759

global_set_log_function.restype = None

760

761

deinit = _library.gnutls_deinit

762

deinit.argtypes = [ClientSession]

763

deinit.restype = None

764

765

handshake = _library.gnutls_handshake

766

handshake.argtypes = [ClientSession]

767

handshake.restype = ctypes.c_int

768

handshake.errcheck = _retry_on_error

769

770

transport_set_ptr = _library.gnutls_transport_set_ptr

771

transport_set_ptr.argtypes = [ClientSession, transport_ptr_t]

772

transport_set_ptr.restype = None

773

774

bye = _library.gnutls_bye

775

bye.argtypes = [ClientSession, close_request_t]

776

bye.restype = ctypes.c_int

777

bye.errcheck = _retry_on_error

778

779

check_version = _library.gnutls_check_version

780

check_version.argtypes = [ctypes.c_char_p]

781

check_version.restype = ctypes.c_char_p

782

783

_need_version = b"3.3.0"

784

if check_version(_need_version) is None:

785

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

786

.format(_need_version))

787

788

_tls_rawpk_version = b"3.6.6"

789

has_rawpk = bool(check_version(_tls_rawpk_version))

790

791

if has_rawpk:

792

# Types

793

class pubkey_st(ctypes.Structure):

794

_fields = []

795

pubkey_t = ctypes.POINTER(pubkey_st)

796

797

x509_crt_fmt_t = ctypes.c_int

798

799

# All the function declarations below are from

800

# gnutls/abstract.h

801

pubkey_init = _library.gnutls_pubkey_init

802

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

803

pubkey_init.restype = _error_code

804

805

pubkey_import = _library.gnutls_pubkey_import

806

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

807

x509_crt_fmt_t]

808

pubkey_import.restype = _error_code

809

810

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

811

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

812

ctypes.POINTER(ctypes.c_ubyte),

813

ctypes.POINTER(ctypes.c_size_t)]

814

pubkey_get_key_id.restype = _error_code

815

816

pubkey_deinit = _library.gnutls_pubkey_deinit

817

pubkey_deinit.argtypes = [pubkey_t]

818

pubkey_deinit.restype = None

819

else:

820

# All the function declarations below are from

821

# gnutls/openpgp.h

822

823

openpgp_crt_init = _library.gnutls_openpgp_crt_init

824

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

825

openpgp_crt_init.restype = _error_code

826

827

openpgp_crt_import = _library.gnutls_openpgp_crt_import

828

openpgp_crt_import.argtypes = [openpgp_crt_t,

829

ctypes.POINTER(datum_t),

830

openpgp_crt_fmt_t]

831

openpgp_crt_import.restype = _error_code

832

833

openpgp_crt_verify_self = \

834

_library.gnutls_openpgp_crt_verify_self

835

openpgp_crt_verify_self.argtypes = [

836

openpgp_crt_t,

837

ctypes.c_uint,

838

ctypes.POINTER(ctypes.c_uint),

839

]

840

openpgp_crt_verify_self.restype = _error_code

841

842

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

843

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

844

openpgp_crt_deinit.restype = None

845

846

openpgp_crt_get_fingerprint = (

847

_library.gnutls_openpgp_crt_get_fingerprint)

848

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

849

ctypes.c_void_p,

850

ctypes.POINTER(

851

ctypes.c_size_t)]

852

openpgp_crt_get_fingerprint.restype = _error_code

853

854

if check_version(b"3.6.4"):

855

certificate_type_get2 = _library.gnutls_certificate_type_get2

856

certificate_type_get2.argtypes = [ClientSession, ctypes.c_int]

857

certificate_type_get2.restype = _error_code

858

859

# Remove non-public functions

860

del _error_code, _retry_on_error

861

862

863

def call_pipe(connection, # : multiprocessing.Connection

864

func, *args, **kwargs):

865

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

866

867

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

868

return value on the provided multiprocessing.Connection.

869

"""

870

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

871

connection.close()

872

873

874

class Client:

409

875

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

410

876

411

877

Attributes:

412

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

878

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

413

879

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

414

880

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

415

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

416

to see if the client lives.

417

'None' if no process is running.

418

checker_callback_tag: a gobject event source tag, or None

881

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

882

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

883

running.

884

checker_callback_tag: a GLib event source tag, or None

419

885

checker_command: string; External command which is run to check

420

886

if client lives. %() expansions are done at

421

887

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

422

888

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

423

checker_initiator_tag: a gobject event source tag, or None

889

checker_initiator_tag: a GLib event source tag, or None

424

890

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

425

891

client_structure: Object describing what attributes a client has

426

892

and is used for storing the client at exit

427

893

current_checker_command: string; current running checker_command

428

disable_initiator_tag: a gobject event source tag, or None

894

disable_initiator_tag: a GLib event source tag, or None

429

895

enabled: bool()

430

896

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

431

uniquely identify the client

897

uniquely identify an OpenPGP client

898

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

899

a client using raw public keys

432

900

host: string; available for use by the checker command

433

901

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

434

902

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

436

904

last_checker_status: integer between 0 and 255 reflecting exit

437

905

status of last checker. -1 reflects crashed

438

906

checker, -2 means no checker completed yet.

907

last_checker_signal: The signal which killed the last checker, if

908

last_checker_status is -1

439

909

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

440

910

441

911

D-Bus identifiers

448

918

disabled, or None

449

919

server_settings: The server_settings dict from main()

450

920

"""

451

921

452

922

runtime_expansions = ("approval_delay", "approval_duration",

453

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

923

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

454

924

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

455

925

"last_approval_request", "last_checked_ok",

456

926

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

457

client_defaults = { "timeout": "PT5M",

458

"extended_timeout": "PT15M",

459

"interval": "PT2M",

460

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

461

"host": "",

462

"approval_delay": "PT0S",

463

"approval_duration": "PT1S",

464

"approved_by_default": "True",

465

"enabled": "True",

466

}

467

468

def timeout_milliseconds(self):

469

"Return the 'timeout' attribute in milliseconds"

470

return timedelta_to_milliseconds(self.timeout)

471

472

def extended_timeout_milliseconds(self):

473

"Return the 'extended_timeout' attribute in milliseconds"

474

return timedelta_to_milliseconds(self.extended_timeout)

475

476

def interval_milliseconds(self):

477

"Return the 'interval' attribute in milliseconds"

478

return timedelta_to_milliseconds(self.interval)

479

480

def approval_delay_milliseconds(self):

481

return timedelta_to_milliseconds(self.approval_delay)

482

927

client_defaults = {

928

"timeout": "PT5M",

929

"extended_timeout": "PT15M",

930

"interval": "PT2M",

931

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

932

"host": "",

933

"approval_delay": "PT0S",

934

"approval_duration": "PT1S",

935

"approved_by_default": "True",

936

"enabled": "True",

937

}

938

483

939

@staticmethod

484

940

def config_parser(config):

485

941

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

492

948

for client_name in config.sections():

493

949

section = dict(config.items(client_name))

494

950

client = settings[client_name] = {}

495

951

496

952

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

497

953

# Reformat values from string types to Python types

498

954

client["approved_by_default"] = config.getboolean(

499

955

client_name, "approved_by_default")

500

956

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

501

957

"enabled")

502

958

959

# Uppercase and remove spaces from key_id and fingerprint

960

# for later comparison purposes with return value from the

961

# key_id() and fingerprint() functions

962

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

963

.replace(" ", ""))

503

964

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

504

965

.replace(" ", ""))

505

966

if "secret" in section:

506

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

967

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

968

.encode("utf-8"),

969

"base64")

507

970

elif "secfile" in section:

508

971

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

509

972

(section["secfile"])),

510

973

"rb") as secfile:

511

974

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

512

975

else:

513

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

976

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

514

977

.format(section))

515

978

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

516

979

client["extended_timeout"] = string_to_delta(

524

987

client["last_approval_request"] = None

525

988

client["last_checked_ok"] = None

526

989

client["last_checker_status"] = -2

527

990

528

991

return settings

529

530

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

992

993

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

531

994

self.name = name

532

995

if server_settings is None:

533

996

server_settings = {}

534

997

self.server_settings = server_settings

535

998

# adding all client settings

536

for setting, value in settings.iteritems():

999

for setting, value in settings.items():

537

1000

setattr(self, setting, value)

538

1001

539

1002

if self.enabled:

540

1003

if not hasattr(self, "last_enabled"):

541

1004

self.last_enabled = datetime.datetime.utcnow()

545

1008

else:

546

1009

self.last_enabled = None

547

1010

self.expires = None

548

549

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

550

# Uppercase and remove spaces from fingerprint for later

551

# comparison purposes with return value from the fingerprint()

552

# function

553

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

1011

1012

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

1013

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

1014

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

554

1015

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

555

1016

datetime.datetime.utcnow())

556

1017

557

1018

# attributes specific for this server instance

558

1019

self.checker = None

559

1020

self.checker_initiator_tag = None

562

1023

self.current_checker_command = None

563

1024

self.approved = None

564

1025

self.approvals_pending = 0

565

self.changedstate = (multiprocessing_manager

566

.Condition(multiprocessing_manager

567

.Lock()))

568

self.client_structure = [attr for attr in

569

self.__dict__.iterkeys()

1026

self.changedstate = multiprocessing_manager.Condition(

1027

multiprocessing_manager.Lock())

1028

self.client_structure = [attr

1029

for attr in self.__dict__.keys()

570

1030

if not attr.startswith("_")]

571

1031

self.client_structure.append("client_structure")

572

573

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

574

lambda obj:

575

isinstance(obj,

576

property)):

1032

1033

for name, t in inspect.getmembers(

1034

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

577

1035

if not name.startswith("_"):

578

1036

self.client_structure.append(name)

579

1037

580

1038

# Send notice to process children that client state has changed

581

1039

def send_changedstate(self):

582

1040

with self.changedstate:

583

1041

self.changedstate.notify_all()

584

1042

585

1043

def enable(self):

586

1044

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

587

1045

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

592

1050

self.last_enabled = datetime.datetime.utcnow()

593

1051

self.init_checker()

594

1052

self.send_changedstate()

595

1053

596

1054

def disable(self, quiet=True):

597

1055

"""Disable this client."""

598

1056

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

599

1057

return False

600

1058

if not quiet:

601

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

1059

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

602

1060

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

603

gobject.source_remove(self.disable_initiator_tag)

1061

GLib.source_remove(self.disable_initiator_tag)

604

1062

self.disable_initiator_tag = None

605

1063

self.expires = None

606

1064

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

607

gobject.source_remove(self.checker_initiator_tag)

1065

GLib.source_remove(self.checker_initiator_tag)

608

1066

self.checker_initiator_tag = None

609

1067

self.stop_checker()

610

1068

self.enabled = False

611

1069

if not quiet:

612

1070

self.send_changedstate()

613

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

1071

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

614

1072

return False

615

1073

616

1074

def __del__(self):

617

1075

self.disable()

618

1076

619

1077

def init_checker(self):

620

1078

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

621

1079

# and every interval from then on.

622

1080

if self.checker_initiator_tag is not None:

623

gobject.source_remove(self.checker_initiator_tag)

624

self.checker_initiator_tag = (gobject.timeout_add

625

(self.interval_milliseconds(),

626

self.start_checker))

1081

GLib.source_remove(self.checker_initiator_tag)

1082

self.checker_initiator_tag = GLib.timeout_add(

1083

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

1084

+ 1)),

1085

self.start_checker)

627

1086

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

628

1087

if self.disable_initiator_tag is not None:

629

gobject.source_remove(self.disable_initiator_tag)

630

self.disable_initiator_tag = (gobject.timeout_add

631

(self.timeout_milliseconds(),

632

self.disable))

1088

GLib.source_remove(self.disable_initiator_tag)

1089

self.disable_initiator_tag = GLib.timeout_add(

1090

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

633

1091

# Also start a new checker *right now*.

634

1092

self.start_checker()

635

636

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

1093

1094

def checker_callback(self, source, condition, connection,

1095

command):

637

1096

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

1097

# Read return code from connection (see call_pipe)

1098

returncode = connection.recv()

1099

connection.close()

1100

if self.checker is not None:

1101

self.checker.join()

638

1102

self.checker_callback_tag = None

639

1103

self.checker = None

640

if os.WIFEXITED(condition):

641

self.last_checker_status = os.WEXITSTATUS(condition)

1104

1105

if returncode >= 0:

1106

self.last_checker_status = returncode

1107

self.last_checker_signal = None

642

1108

if self.last_checker_status == 0:

643

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

644

vars(self))

1109

log.info("Checker for %(name)s succeeded", vars(self))

645

1110

self.checked_ok()

646

1111

else:

647

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

648

vars(self))

1112

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

649

1113

else:

650

1114

self.last_checker_status = -1

651

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

652

vars(self))

653

1115

self.last_checker_signal = -returncode

1116

log.warning("Checker for %(name)s crashed?", vars(self))

1117

return False

1118

654

1119

def checked_ok(self):

655

1120

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

656

1121

self.last_checked_ok = datetime.datetime.utcnow()

657

1122

self.last_checker_status = 0

1123

self.last_checker_signal = None

658

1124

self.bump_timeout()

659

1125

660

1126

def bump_timeout(self, timeout=None):

661

1127

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

662

1128

if timeout is None:

663

1129

timeout = self.timeout

664

1130

if self.disable_initiator_tag is not None:

665

gobject.source_remove(self.disable_initiator_tag)

1131

GLib.source_remove(self.disable_initiator_tag)

666

1132

self.disable_initiator_tag = None

667

1133

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

668

self.disable_initiator_tag = (gobject.timeout_add

669

(timedelta_to_milliseconds

670

(timeout), self.disable))

1134

self.disable_initiator_tag = GLib.timeout_add(

1135

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

671

1136

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

672

1137

673

1138

def need_approval(self):

674

1139

self.last_approval_request = datetime.datetime.utcnow()

675

1140

676

1141

def start_checker(self):

677

1142

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

678

1143

679

1144

If a checker already exists, leave it running and do

680

1145

nothing."""

681

1146

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

686

1151

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

687

1152

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

688

1153

# should be.

689

690

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

691

try:

692

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

693

except AttributeError:

694

pass

695

except OSError as error:

696

if error.errno != errno.ECHILD:

697

raise

698

else:

699

if pid:

700

logger.warning("Checker was a zombie")

701

gobject.source_remove(self.checker_callback_tag)

702

self.checker_callback(pid, status,

703

self.current_checker_command)

1154

1155

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

1156

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

1157

self.checker.join()

1158

self.checker = None

704

1159

# Start a new checker if needed

705

1160

if self.checker is None:

706

1161

# Escape attributes for the shell

707

escaped_attrs = dict(

708

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

709

for attr in

710

self.runtime_expansions)

1162

escaped_attrs = {

1163

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

1164

for attr in self.runtime_expansions}

711

1165

try:

712

1166

command = self.checker_command % escaped_attrs

713

1167

except TypeError as error:

714

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

715

self.checker_command, exc_info=error)

716

return True # Try again later

1168

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

1169

self.checker_command, exc_info=error)

1170

return True # Try again later

717

1171

self.current_checker_command = command

718

try:

719

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

720

command, self.name)

721

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

722

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

723

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

724

# always replaced by /dev/null.)

725

# The exception is when not debugging but nevertheless

726

# running in the foreground; use the previously

727

# created wnull.

728

popen_args = {}

729

if (not self.server_settings["debug"]

730

and self.server_settings["foreground"]):

731

popen_args.update({"stdout": wnull,

732

"stderr": wnull })

733

self.checker = subprocess.Popen(command,

734

close_fds=True,

735

shell=True, cwd="/",

736

**popen_args)

737

except OSError as error:

738

logger.error("Failed to start subprocess",

739

exc_info=error)

740

return True

741

self.checker_callback_tag = (gobject.child_watch_add

742

(self.checker.pid,

743

self.checker_callback,

744

data=command))

745

# The checker may have completed before the gobject

746

# watch was added. Check for this.

747

try:

748

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

749

except OSError as error:

750

if error.errno == errno.ECHILD:

751

# This should never happen

752

logger.error("Child process vanished",

753

exc_info=error)

754

return True

755

raise

756

if pid:

757

gobject.source_remove(self.checker_callback_tag)

758

self.checker_callback(pid, status, command)

759

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

1172

log.info("Starting checker %r for %s", command, self.name)

1173

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

1174

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

1175

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

1176

# always replaced by /dev/null.)

1177

# The exception is when not debugging but nevertheless

1178

# running in the foreground; use the previously

1179

# created wnull.

1180

popen_args = {"close_fds": True,

1181

"shell": True,

1182

"cwd": "/"}

1183

if (not self.server_settings["debug"]

1184

and self.server_settings["foreground"]):

1185

popen_args.update({"stdout": wnull,

1186

"stderr": wnull})

1187

pipe = multiprocessing.Pipe(duplex=False)

1188

self.checker = multiprocessing.Process(

1189

target=call_pipe,

1190

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

1191

kwargs=popen_args)

1192

self.checker.start()

1193

self.checker_callback_tag = GLib.io_add_watch(

1194

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

1195

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

1196

self.checker_callback, pipe[0], command)

1197

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

760

1198

return True

761

1199

762

1200

def stop_checker(self):

763

1201

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

764

1202

if self.checker_callback_tag:

765

gobject.source_remove(self.checker_callback_tag)

1203

GLib.source_remove(self.checker_callback_tag)

766

1204

self.checker_callback_tag = None

767

1205

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

768

1206

return

769

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

770

try:

771

self.checker.terminate()

772

#time.sleep(0.5)

773

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

774

# self.checker.kill()

775

except OSError as error:

776

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

777

raise

1207

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

1208

self.checker.terminate()

778

1209

self.checker = None

779

1210

780

1211

781

def dbus_service_property(dbus_interface, signature="v",

782

access="readwrite", byte_arrays=False):

1212

def dbus_service_property(dbus_interface,

1213

signature="v",

1214

access="readwrite",

1215

byte_arrays=False):

783

1216

"""Decorators for marking methods of a DBusObjectWithProperties to

784

1217

become properties on the D-Bus.

785

1218

786

1219

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

787

1220

and with one argument by "Set".

788

1221

789

1222

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

790

1223

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

791

1224

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

794

1227

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

795

1228

if byte_arrays and signature != "ay":

796

1229

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

797

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

1230

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

1231

798

1232

def decorator(func):

799

1233

func._dbus_is_property = True

800

1234

func._dbus_interface = dbus_interface

803

1237

func._dbus_name = func.__name__

804

1238

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

805

1239

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

806

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1240

func._dbus_get_args_options = {"byte_arrays": byte_arrays}

807

1241

return func

1242

808

1243

return decorator

809

1244

810

1245

811

1246

def dbus_interface_annotations(dbus_interface):

812

1247

"""Decorator for marking functions returning interface annotations

813

1248

814

1249

Usage:

815

1250

816

1251

@dbus_interface_annotations("org.example.Interface")

817

1252

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

818

1253

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

819

1254

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

820

1255

"false"}

821

1256

"""

1257

822

1258

def decorator(func):

823

1259

func._dbus_is_interface = True

824

1260

func._dbus_interface = dbus_interface

825

1261

func._dbus_name = dbus_interface

826

1262

return func

1263

827

1264

return decorator

828

1265

829

1266

830

1267

def dbus_annotations(annotations):

831

1268

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

832

1269

Usage:

833

1270

1271

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

1272

"org.freedesktop.DBus.Property."

1273

"EmitsChangedSignal": "false"})

834

1274

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

835

1275

access="r")

836

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

837

"org.freedesktop.DBus.Property."

838

"EmitsChangedSignal": "false"})

839

1276

def Property_dbus_property(self):

840

1277

return dbus.Boolean(False)

1278

1279

See also the DBusObjectWithAnnotations class.

841

1280

"""

1281

842

1282

def decorator(func):

843

1283

func._dbus_annotations = annotations

844

1284

return func

1285

845

1286

return decorator

846

1287

847

1288

848

1289

class DBusPropertyException(dbus.exceptions.DBusException):

849

1290

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

850

1291

"""

851

def __unicode__(self):

852

return unicode(str(self))

1292

pass

853

1293

854

1294

855

1295

class DBusPropertyAccessException(DBusPropertyException):

864

1304

pass

865

1305

866

1306

867

class DBusObjectWithProperties(dbus.service.Object):

868

"""A D-Bus object with properties.

869

870

Classes inheriting from this can use the dbus_service_property

871

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

872

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

1307

class DBusObjectWithAnnotations(dbus.service.Object):

1308

"""A D-Bus object with annotations.

1309

1310

Classes inheriting from this can use the dbus_annotations

1311

decorator to add annotations to methods or signals.

873

1312

"""

874

1313

875

1314

@staticmethod

876

1315

def _is_dbus_thing(thing):

877

1316

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

878

1317

879

1318

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

880

1319

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

881

1320

"""

882

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

1321

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

883

1322

False)

884

1323

885

1324

def _get_all_dbus_things(self, thing):

886

1325

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

887

1326

"""

888

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

889

name),

1327

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

890

1328

athing.__get__(self))

891

1329

for cls in self.__class__.__mro__

892

1330

for name, athing in

893

inspect.getmembers(cls,

894

self._is_dbus_thing(thing)))

895

1331

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

1332

1333

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1334

out_signature="s",

1335

path_keyword="object_path",

1336

connection_keyword="connection")

1337

def Introspect(self, object_path, connection):

1338

"""Overloading of standard D-Bus method.

1339

1340

Inserts annotation tags on methods and signals.

1341

"""

1342

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

1343

connection)

1344

try:

1345

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

1346

1347

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

1348

# Add annotation tags

1349

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

1350

for tag in if_tag.getElementsByTagName(typ):

1351

annots = dict()

1352

for name, prop in (self.

1353

_get_all_dbus_things(typ)):

1354

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

1355

and prop._dbus_interface

1356

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

1357

annots.update(getattr(

1358

prop, "_dbus_annotations", {}))

1359

for name, value in annots.items():

1360

ann_tag = document.createElement(

1361

"annotation")

1362

ann_tag.setAttribute("name", name)

1363

ann_tag.setAttribute("value", value)

1364

tag.appendChild(ann_tag)

1365

# Add interface annotation tags

1366

for annotation, value in dict(

1367

itertools.chain.from_iterable(

1368

annotations().items()

1369

for name, annotations

1370

in self._get_all_dbus_things("interface")

1371

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

1372

)).items():

1373

ann_tag = document.createElement("annotation")

1374

ann_tag.setAttribute("name", annotation)

1375

ann_tag.setAttribute("value", value)

1376

if_tag.appendChild(ann_tag)

1377

# Fix argument name for the Introspect method itself

1378

if (if_tag.getAttribute("name")

1379

== dbus.INTROSPECTABLE_IFACE):

1380

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

1381

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

1382

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

1383

if (arg.getAttribute("direction")

1384

== "out"):

1385

arg.setAttribute("name",

1386

"xml_data")

1387

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

1388

document.unlink()

1389

except (AttributeError, xml.dom.DOMException,

1390

xml.parsers.expat.ExpatError) as error:

1391

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

1392

exc_info=error)

1393

return xmlstring

1394

1395

1396

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1397

"""A D-Bus object with properties.

1398

1399

Classes inheriting from this can use the dbus_service_property

1400

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

1401

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

1402

"""

1403

896

1404

def _get_dbus_property(self, interface_name, property_name):

897

1405

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

898

1406

property with the specified name and interface.

899

1407

"""

900

for cls in self.__class__.__mro__:

901

for name, value in (inspect.getmembers

902

(cls,

903

self._is_dbus_thing("property"))):

1408

for cls in self.__class__.__mro__:

1409

for name, value in inspect.getmembers(

1410

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

904

1411

if (value._dbus_name == property_name

905

1412

and value._dbus_interface == interface_name):

906

1413

return value.__get__(self)

907

1414

908

1415

# No such property

909

raise DBusPropertyNotFound(self.dbus_object_path + ":"

910

+ interface_name + "."

911

+ property_name)

912

913

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

1416

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

1417

self.dbus_object_path, interface_name, property_name))

1418

1419

@classmethod

1420

def _get_all_interface_names(cls):

1421

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

1422

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

1423

"_dbus_interface", None)

1424

for x in (inspect.getmro(cls))

1425

for attr in dir(x))

1426

if name is not None)

1427

1428

@dbus.service.method(dbus.PROPERTIES_IFACE,

1429

in_signature="ss",

914

1430

out_signature="v")

915

1431

def Get(self, interface_name, property_name):

916

1432

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

922

1438

if not hasattr(value, "variant_level"):

923

1439

return value

924

1440

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

925

1441

926

1442

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

927

1443

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

928

1444

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

934

1450

# The byte_arrays option is not supported yet on

935

1451

# signatures other than "ay".

936

1452

if prop._dbus_signature != "ay":

937

raise ValueError

938

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

939

for byte in value))

1453

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

1454

"'ay' signature {!r}"

1455

.format(prop._dbus_signature))

1456

value = dbus.ByteArray(bytes(value))

940

1457

prop(value)

941

942

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

1458

1459

@dbus.service.method(dbus.PROPERTIES_IFACE,

1460

in_signature="s",

943

1461

out_signature="a{sv}")

944

1462

def GetAll(self, interface_name):

945

1463

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

946

1464

standard.

947

1465

948

1466

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

949

1467

"""

950

1468

properties = {}

960

1478

if not hasattr(value, "variant_level"):

961

1479

properties[name] = value

962

1480

continue

963

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

964

value.variant_level+1)

1481

properties[name] = type(value)(

1482

value, variant_level=value.variant_level + 1)

965

1483

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

966

1484

1485

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

1486

def PropertiesChanged(self, interface_name, changed_properties,

1487

invalidated_properties):

1488

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

1489

standard.

1490

"""

1491

pass

1492

967

1493

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

968

1494

out_signature="s",

969

path_keyword='object_path',

970

connection_keyword='connection')

1495

path_keyword="object_path",

1496

connection_keyword="connection")

971

1497

def Introspect(self, object_path, connection):

972

1498

"""Overloading of standard D-Bus method.

973

1499

974

1500

Inserts property tags and interface annotation tags.

975

1501

"""

976

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

977

connection)

1502

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1503

object_path,

1504

connection)

978

1505

try:

979

1506

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

1507

980

1508

def make_tag(document, name, prop):

981

1509

e = document.createElement("property")

982

1510

e.setAttribute("name", name)

983

1511

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

984

1512

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

985

1513

return e

1514

986

1515

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

987

1516

# Add property tags

988

1517

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

991

1520

if prop._dbus_interface

992

1521

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

993

1522

if_tag.appendChild(tag)

994

# Add annotation tags

995

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

996

for tag in if_tag.getElementsByTagName(typ):

997

annots = dict()

998

for name, prop in (self.

999

_get_all_dbus_things(typ)):

1000

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

1001

and prop._dbus_interface

1002

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

1003

annots.update(getattr

1004

(prop,

1005

"_dbus_annotations",

1006

{}))

1007

for name, value in annots.iteritems():

1008

ann_tag = document.createElement(

1009

"annotation")

1010

ann_tag.setAttribute("name", name)

1011

ann_tag.setAttribute("value", value)

1012

tag.appendChild(ann_tag)

1013

# Add interface annotation tags

1014

for annotation, value in dict(

1015

itertools.chain.from_iterable(

1016

annotations().iteritems()

1017

for name, annotations in

1018

self._get_all_dbus_things("interface")

1019

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

1020

)).iteritems():

1021

ann_tag = document.createElement("annotation")

1022

ann_tag.setAttribute("name", annotation)

1023

ann_tag.setAttribute("value", value)

1024

if_tag.appendChild(ann_tag)

1523

# Add annotation tags for properties

1524

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

1525

annots = dict()

1526

for name, prop in self._get_all_dbus_things(

1527

"property"):

1528

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

1529

and prop._dbus_interface

1530

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

1531

annots.update(getattr(

1532

prop, "_dbus_annotations", {}))

1533

for name, value in annots.items():

1534

ann_tag = document.createElement(

1535

"annotation")

1536

ann_tag.setAttribute("name", name)

1537

ann_tag.setAttribute("value", value)

1538

tag.appendChild(ann_tag)

1025

1539

# Add the names to the return values for the

1026

1540

# "org.freedesktop.DBus.Properties" methods

1027

1541

if (if_tag.getAttribute("name")

1041

1555

document.unlink()

1042

1556

except (AttributeError, xml.dom.DOMException,

1043

1557

xml.parsers.expat.ExpatError) as error:

1044

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

1045

exc_info=error)

1558

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

1559

exc_info=error)

1560

return xmlstring

1561

1562

1563

try:

1564

dbus.OBJECT_MANAGER_IFACE

1565

except AttributeError:

1566

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

1567

1568

1569

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1570

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

1571

1572

Classes inheriting from this exposes the standard

1573

GetManagedObjects call and the InterfacesAdded and

1574

InterfacesRemoved signals on the standard

1575

"org.freedesktop.DBus.ObjectManager" interface.

1576

1577

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

1578

manually.

1579

"""

1580

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1581

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

1582

def GetManagedObjects(self):

1583

"""This function must be overridden"""

1584

raise NotImplementedError()

1585

1586

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1587

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

1588

def InterfacesAdded(self, object_path, interfaces_and_properties):

1589

pass

1590

1591

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

1592

def InterfacesRemoved(self, object_path, interfaces):

1593

pass

1594

1595

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1596

out_signature="s",

1597

path_keyword="object_path",

1598

connection_keyword="connection")

1599

def Introspect(self, object_path, connection):

1600

"""Overloading of standard D-Bus method.

1601

1602

Override return argument name of GetManagedObjects to be

1603

"objpath_interfaces_and_properties"

1604

"""

1605

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1606

object_path,

1607

connection)

1608

try:

1609

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

1610

1611

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

1612

# Fix argument name for the GetManagedObjects method

1613

if (if_tag.getAttribute("name")

1614

== dbus.OBJECT_MANAGER_IFACE):

1615

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

1616

if (cn.getAttribute("name")

1617

== "GetManagedObjects"):

1618

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

1619

if (arg.getAttribute("direction")

1620

== "out"):

1621

arg.setAttribute(

1622

"name",

1623

"objpath_interfaces"

1624

"_and_properties")

1625

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

1626

document.unlink()

1627

except (AttributeError, xml.dom.DOMException,

1628

xml.parsers.expat.ExpatError) as error:

1629

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

1630

exc_info=error)

1046

1631

return xmlstring

1047

1632

1048

1633

1049

1634

def datetime_to_dbus(dt, variant_level=0):

1050

1635

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

1051

1636

if dt is None:

1052

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

1053

return dbus.String(dt.isoformat(),

1054

variant_level=variant_level)

1637

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

1638

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

1055

1639

1056

1640

1057

1641

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1059

1643

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

1060

1644

interface names according to the "alt_interface_names" mapping.

1061

1645

Usage:

1062

1646

1063

1647

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

1064

1648

"net.example.AlternateInterface"})

1065

1649

class SampleDBusObject(dbus.service.Object):

1066

1650

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

1067

1651

def SampleDBusMethod():

1068

1652

pass

1069

1653

1070

1654

The above "SampleDBusMethod" on "SampleDBusObject" will be

1071

1655

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

1072

1656

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

1073

1657

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

1074

1658

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

1075

1659

1076

1660

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

1077

1661

(from DBusObjectWithProperties) and interfaces (from the

1078

1662

dbus_interface_annotations decorator).

1079

1663

"""

1664

1080

1665

def wrapper(cls):

1081

1666

for orig_interface_name, alt_interface_name in (

1082

alt_interface_names.iteritems()):

1667

alt_interface_names.items()):

1083

1668

attr = {}

1084

1669

interface_names = set()

1085

1670

# Go though all attributes of the class

1087

1672

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

1088

1673

# with the wrong interface name

1089

1674

if (not hasattr(attribute, "_dbus_interface")

1090

or not attribute._dbus_interface

1091

.startswith(orig_interface_name)):

1675

or not attribute._dbus_interface.startswith(

1676

orig_interface_name)):

1092

1677

continue

1093

1678

# Create an alternate D-Bus interface name based on

1094

1679

# the current name

1095

alt_interface = (attribute._dbus_interface

1096

.replace(orig_interface_name,

1097

alt_interface_name))

1680

alt_interface = attribute._dbus_interface.replace(

1681

orig_interface_name, alt_interface_name)

1098

1682

interface_names.add(alt_interface)

1099

1683

# Is this a D-Bus signal?

1100

1684

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

1101

1685

# Extract the original non-method undecorated

1102

1686

# function by black magic

1103

nonmethod_func = (dict(

1687

if sys.version_info.major == 2:

1688

nonmethod_func = (dict(

1104

1689

zip(attribute.func_code.co_freevars,

1105

attribute.__closure__))["func"]

1106

.cell_contents)

1690

attribute.__closure__))

1691

["func"].cell_contents)

1692

else:

1693

nonmethod_func = (dict(

1694

zip(attribute.__code__.co_freevars,

1695

attribute.__closure__))

1696

["func"].cell_contents)

1107

1697

# Create a new, but exactly alike, function

1108

1698

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

1109

1699

# with the alternate D-Bus interface name

1110

new_function = (dbus.service.signal

1111

(alt_interface,

1112

attribute._dbus_signature)

1113

(types.FunctionType(

1114

nonmethod_func.func_code,

1115

nonmethod_func.func_globals,

1116

nonmethod_func.func_name,

1117

nonmethod_func.func_defaults,

1118

nonmethod_func.func_closure)))

1700

new_function = copy_function(nonmethod_func)

1701

new_function = (dbus.service.signal(

1702

alt_interface,

1703

attribute._dbus_signature)(new_function))

1119

1704

# Copy annotations, if any

1120

1705

try:

1121

new_function._dbus_annotations = (

1122

dict(attribute._dbus_annotations))

1706

new_function._dbus_annotations = dict(

1707

attribute._dbus_annotations)

1123

1708

except AttributeError:

1124

1709

pass

1710

1125

1711

# Define a creator of a function to call both the

1126

1712

# original and alternate functions, so both the

1127

1713

# original and alternate signals gets sent when

1130

1716

"""This function is a scope container to pass

1131

1717

func1 and func2 to the "call_both" function

1132

1718

outside of its arguments"""

1719

1720

@functools.wraps(func2)

1133

1721

def call_both(*args, **kwargs):

1134

1722

"""This function will emit two D-Bus

1135

1723

signals by calling func1 and func2"""

1136

1724

func1(*args, **kwargs)

1137

1725

func2(*args, **kwargs)

1726

# Make wrapper function look like a D-Bus

1727

# signal

1728

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

1729

if name.startswith("_dbus_"):

1730

setattr(call_both, name, attr)

1731

1138

1732

return call_both

1139

1733

# Create the "call_both" function and add it to

1140

1734

# the class

1145

1739

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

1146

1740

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

1147

1741

# to the class.

1148

attr[attrname] = (dbus.service.method

1149

(alt_interface,

1150

attribute._dbus_in_signature,

1151

attribute._dbus_out_signature)

1152

(types.FunctionType

1153

(attribute.func_code,

1154

attribute.func_globals,

1155

attribute.func_name,

1156

attribute.func_defaults,

1157

attribute.func_closure)))

1742

attr[attrname] = (

1743

dbus.service.method(

1744

alt_interface,

1745

attribute._dbus_in_signature,

1746

attribute._dbus_out_signature)

1747

(copy_function(attribute)))

1158

1748

# Copy annotations, if any

1159

1749

try:

1160

attr[attrname]._dbus_annotations = (

1161

dict(attribute._dbus_annotations))

1750

attr[attrname]._dbus_annotations = dict(

1751

attribute._dbus_annotations)

1162

1752

except AttributeError:

1163

1753

pass

1164

1754

# Is this a D-Bus property?

1167

1757

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

1168

1758

# property with the alternate D-Bus interface

1169

1759

# name. Add it to the class.

1170

attr[attrname] = (dbus_service_property

1171

(alt_interface,

1172

attribute._dbus_signature,

1173

attribute._dbus_access,

1174

attribute

1175

._dbus_get_args_options

1176

["byte_arrays"])

1177

(types.FunctionType

1178

(attribute.func_code,

1179

attribute.func_globals,

1180

attribute.func_name,

1181

attribute.func_defaults,

1182

attribute.func_closure)))

1760

attr[attrname] = (dbus_service_property(

1761

alt_interface, attribute._dbus_signature,

1762

attribute._dbus_access,

1763

attribute._dbus_get_args_options

1764

["byte_arrays"])

1765

(copy_function(attribute)))

1183

1766

# Copy annotations, if any

1184

1767

try:

1185

attr[attrname]._dbus_annotations = (

1186

dict(attribute._dbus_annotations))

1768

attr[attrname]._dbus_annotations = dict(

1769

attribute._dbus_annotations)

1187

1770

except AttributeError:

1188

1771

pass

1189

1772

# Is this a D-Bus interface?

1192

1775

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

1193

1776

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

1194

1777

# to the class.

1195

attr[attrname] = (dbus_interface_annotations

1196

(alt_interface)

1197

(types.FunctionType

1198

(attribute.func_code,

1199

attribute.func_globals,

1200

attribute.func_name,

1201

attribute.func_defaults,

1202

attribute.func_closure)))

1778

attr[attrname] = (

1779

dbus_interface_annotations(alt_interface)

1780

(copy_function(attribute)))

1203

1781

if deprecate:

1204

1782

# Deprecate all alternate interfaces

1205

iname="_AlternateDBusNames_interface_annotation{0}"

1783

iname = "_AlternateDBusNames_interface_annotation{}"

1206

1784

for interface_name in interface_names:

1785

1207

1786

@dbus_interface_annotations(interface_name)

1208

1787

def func(self):

1209

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

1210

"true" }

1788

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

1789

"true"}

1211

1790

# Find an unused name

1212

1791

for aname in (iname.format(i)

1213

1792

for i in itertools.count()):

1217

1796

if interface_names:

1218

1797

# Replace the class with a new subclass of it with

1219

1798

# methods, signals, etc. as created above.

1220

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

1221

(cls,), attr)

1799

if sys.version_info.major == 2:

1800

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

1801

(cls, ), attr)

1802

else:

1803

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

1804

(cls, ), attr)

1222

1805

return cls

1806

1223

1807

return wrapper

1224

1808

1225

1809

1226

1810

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

1227

"se.bsnet.fukt.Mandos"})

1811

"se.bsnet.fukt.Mandos"})

1228

1812

class ClientDBus(Client, DBusObjectWithProperties):

1229

1813

"""A Client class using D-Bus

1230

1814

1231

1815

Attributes:

1232

1816

dbus_object_path: dbus.ObjectPath

1233

1817

bus: dbus.SystemBus()

1234

1818

"""

1235

1819

1236

1820

runtime_expansions = (Client.runtime_expansions

1237

+ ("dbus_object_path",))

1238

1821

+ ("dbus_object_path", ))

1822

1823

_interface = "se.recompile.Mandos.Client"

1824

1239

1825

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

1240

1241

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

1826

1827

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

1242

1828

self.bus = bus

1243

1829

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

1244

1830

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

1245

1831

# the D-Bus

1246

client_object_name = unicode(self.name).translate(

1832

client_object_name = str(self.name).translate(

1247

1833

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

1248

1834

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

1249

self.dbus_object_path = (dbus.ObjectPath

1250

("/clients/" + client_object_name))

1835

self.dbus_object_path = dbus.ObjectPath(

1836

"/clients/" + client_object_name)

1251

1837

DBusObjectWithProperties.__init__(self, self.bus,

1252

1838

self.dbus_object_path)

1253

1254

def notifychangeproperty(transform_func,

1255

dbus_name, type_func=lambda x: x,

1256

variant_level=1):

1839

1840

def notifychangeproperty(transform_func, dbus_name,

1841

type_func=lambda x: x,

1842

variant_level=1,

1843

invalidate_only=False,

1844

_interface=_interface):

1257

1845

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

1258

1846

its changes to DBus.

1259

1847

1260

1848

transform_fun: Function that takes a value and a variant_level

1261

1849

and transforms it to a D-Bus type.

1262

1850

dbus_name: D-Bus name of the variable

1264

1852

to the D-Bus. Default: no transform

1265

1853

variant_level: D-Bus variant level. Default: 1

1266

1854

"""

1267

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

1855

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

1856

1268

1857

def setter(self, value):

1269

1858

if hasattr(self, "dbus_object_path"):

1270

1859

if (not hasattr(self, attrname) or

1271

1860

type_func(getattr(self, attrname, None))

1272

1861

!= type_func(value)):

1273

dbus_value = transform_func(type_func(value),

1274

variant_level

1275

=variant_level)

1276

self.PropertyChanged(dbus.String(dbus_name),

1277

dbus_value)

1862

if invalidate_only:

1863

self.PropertiesChanged(

1864

_interface, dbus.Dictionary(),

1865

dbus.Array((dbus_name, )))

1866

else:

1867

dbus_value = transform_func(

1868

type_func(value),

1869

variant_level=variant_level)

1870

self.PropertyChanged(dbus.String(dbus_name),

1871

dbus_value)

1872

self.PropertiesChanged(

1873

_interface,

1874

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

1875

dbus_value}),

1876

dbus.Array())

1278

1877

setattr(self, attrname, value)

1279

1878

1280

1879

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

1281

1880

1282

1881

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1283

1882

approvals_pending = notifychangeproperty(dbus.Boolean,

1284

1883

"ApprovalPending",

1285

type_func = bool)

1884

type_func=bool)

1286

1885

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

1287

1886

last_enabled = notifychangeproperty(datetime_to_dbus,

1288

1887

"LastEnabled")

1289

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

1290

type_func = lambda checker:

1291

checker is not None)

1888

checker = notifychangeproperty(

1889

dbus.Boolean, "CheckerRunning",

1890

type_func=lambda checker: checker is not None)

1292

1891

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1293

1892

"LastCheckedOK")

1294

1893

last_checker_status = notifychangeproperty(dbus.Int16,

1297

1896

datetime_to_dbus, "LastApprovalRequest")

1298

1897

approved_by_default = notifychangeproperty(dbus.Boolean,

1299

1898

"ApprovedByDefault")

1300

approval_delay = notifychangeproperty(dbus.UInt64,

1301

"ApprovalDelay",

1302

type_func =

1303

timedelta_to_milliseconds)

1899

approval_delay = notifychangeproperty(

1900

dbus.UInt64, "ApprovalDelay",

1901

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

1304

1902

approval_duration = notifychangeproperty(

1305

1903

dbus.UInt64, "ApprovalDuration",

1306

type_func = timedelta_to_milliseconds)

1904

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

1307

1905

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

1308

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

1309

type_func =

1310

timedelta_to_milliseconds)

1906

timeout = notifychangeproperty(

1907

dbus.UInt64, "Timeout",

1908

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

1311

1909

extended_timeout = notifychangeproperty(

1312

1910

dbus.UInt64, "ExtendedTimeout",

1313

type_func = timedelta_to_milliseconds)

1314

interval = notifychangeproperty(dbus.UInt64,

1315

"Interval",

1316

type_func =

1317

timedelta_to_milliseconds)

1911

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

1912

interval = notifychangeproperty(

1913

dbus.UInt64, "Interval",

1914

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

1318

1915

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

1319

1916

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

1917

invalidate_only=True)

1918

1320

1919

del notifychangeproperty

1321

1920

1322

1921

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

1323

1922

try:

1324

1923

self.remove_from_connection()

1327

1926

if hasattr(DBusObjectWithProperties, "__del__"):

1328

1927

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

1329

1928

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

1330

1331

def checker_callback(self, pid, condition, command,

1332

*args, **kwargs):

1333

self.checker_callback_tag = None

1334

self.checker = None

1335

if os.WIFEXITED(condition):

1336

exitstatus = os.WEXITSTATUS(condition)

1929

1930

def checker_callback(self, source, condition,

1931

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

1932

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

1933

connection, command, *args,

1934

**kwargs)

1935

exitstatus = self.last_checker_status

1936

if exitstatus >= 0:

1337

1937

# Emit D-Bus signal

1338

1938

self.CheckerCompleted(dbus.Int16(exitstatus),

1339

dbus.Int64(condition),

1939

# This is specific to GNU libC

1940

dbus.Int64(exitstatus << 8),

1340

1941

dbus.String(command))

1341

1942

else:

1342

1943

# Emit D-Bus signal

1343

1944

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

1344

dbus.Int64(condition),

1945

dbus.Int64(

1946

# This is specific to GNU libC

1947

(exitstatus << 8)

1948

| self.last_checker_signal),

1345

1949

dbus.String(command))

1346

1347

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

1348

*args, **kwargs)

1349

1950

return ret

1951

1350

1952

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

1351

old_checker = self.checker

1352

if self.checker is not None:

1353

old_checker_pid = self.checker.pid

1354

else:

1355

old_checker_pid = None

1953

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

1356

1954

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

1357

1955

# Only if new checker process was started

1358

1956

if (self.checker is not None

1360

1958

# Emit D-Bus signal

1361

1959

self.CheckerStarted(self.current_checker_command)

1362

1960

return r

1363

1961

1364

1962

def _reset_approved(self):

1365

1963

self.approved = None

1366

1964

return False

1367

1965

1368

1966

def approve(self, value=True):

1369

1967

self.approved = value

1370

gobject.timeout_add(timedelta_to_milliseconds

1371

(self.approval_duration),

1372

self._reset_approved)

1968

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

1969

* 1000), self._reset_approved)

1373

1970

self.send_changedstate()

1374

1375

## D-Bus methods, signals & properties

1376

_interface = "se.recompile.Mandos.Client"

1377

1378

## Interfaces

1379

1380

@dbus_interface_annotations(_interface)

1381

def _foo(self):

1382

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

1383

"false"}

1384

1385

## Signals

1386

1971

1972

# D-Bus methods, signals & properties

1973

1974

# Interfaces

1975

1976

# Signals

1977

1387

1978

# CheckerCompleted - signal

1388

1979

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

1389

1980

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

1390

1981

"D-Bus signal"

1391

1982

pass

1392

1983

1393

1984

# CheckerStarted - signal

1394

1985

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

1395

1986

def CheckerStarted(self, command):

1396

1987

"D-Bus signal"

1397

1988

pass

1398

1989

1399

1990

# PropertyChanged - signal

1991

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

1400

1992

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

1401

1993

def PropertyChanged(self, property, value):

1402

1994

"D-Bus signal"

1403

1995

pass

1404

1996

1405

1997

# GotSecret - signal

1406

1998

@dbus.service.signal(_interface)

1407

1999

def GotSecret(self):

1410

2002

server to mandos-client

1411

2003

"""

1412

2004

pass

1413

2005

1414

2006

# Rejected - signal

1415

2007

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

1416

2008

def Rejected(self, reason):

1417

2009

"D-Bus signal"

1418

2010

pass

1419

2011

1420

2012

# NeedApproval - signal

1421

2013

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

1422

2014

def NeedApproval(self, timeout, default):

1423

2015

"D-Bus signal"

1424

2016

return self.need_approval()

1425

1426

## Methods

1427

2017

2018

# Methods

2019

1428

2020

# Approve - method

1429

2021

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

1430

2022

def Approve(self, value):

1431

2023

self.approve(value)

1432

2024

1433

2025

# CheckedOK - method

1434

2026

@dbus.service.method(_interface)

1435

2027

def CheckedOK(self):

1436

2028

self.checked_ok()

1437

2029

1438

2030

# Enable - method

2031

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

1439

2032

@dbus.service.method(_interface)

1440

2033

def Enable(self):

1441

2034

"D-Bus method"

1442

2035

self.enable()

1443

2036

1444

2037

# StartChecker - method

2038

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

1445

2039

@dbus.service.method(_interface)

1446

2040

def StartChecker(self):

1447

2041

"D-Bus method"

1448

2042

self.start_checker()

1449

2043

1450

2044

# Disable - method

2045

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

1451

2046

@dbus.service.method(_interface)

1452

2047

def Disable(self):

1453

2048

"D-Bus method"

1454

2049

self.disable()

1455

2050

1456

2051

# StopChecker - method

2052

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

1457

2053

@dbus.service.method(_interface)

1458

2054

def StopChecker(self):

1459

2055

self.stop_checker()

1460

1461

## Properties

1462

2056

2057

# Properties

2058

1463

2059

# ApprovalPending - property

1464

2060

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

1465

2061

def ApprovalPending_dbus_property(self):

1466

2062

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

1467

2063

1468

2064

# ApprovedByDefault - property

1469

@dbus_service_property(_interface, signature="b",

2065

@dbus_service_property(_interface,

2066

signature="b",

1470

2067

access="readwrite")

1471

2068

def ApprovedByDefault_dbus_property(self, value=None):

1472

2069

if value is None: # get

1473

2070

return dbus.Boolean(self.approved_by_default)

1474

2071

self.approved_by_default = bool(value)

1475

2072

1476

2073

# ApprovalDelay - property

1477

@dbus_service_property(_interface, signature="t",

2074

@dbus_service_property(_interface,

2075

signature="t",

1478

2076

access="readwrite")

1479

2077

def ApprovalDelay_dbus_property(self, value=None):

1480

2078

if value is None: # get

1481

return dbus.UInt64(self.approval_delay_milliseconds())

2079

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

2080

* 1000)

1482

2081

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

1483

2082

1484

2083

# ApprovalDuration - property

1485

@dbus_service_property(_interface, signature="t",

2084

@dbus_service_property(_interface,

2085

signature="t",

1486

2086

access="readwrite")

1487

2087

def ApprovalDuration_dbus_property(self, value=None):

1488

2088

if value is None: # get

1489

return dbus.UInt64(timedelta_to_milliseconds(

1490

self.approval_duration))

2089

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

2090

* 1000)

1491

2091

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

1492

2092

1493

2093

# Name - property

2094

@dbus_annotations(

2095

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

1494

2096

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

1495

2097

def Name_dbus_property(self):

1496

2098

return dbus.String(self.name)

1497

2099

2100

# KeyID - property

2101

@dbus_annotations(

2102

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

2103

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

2104

def KeyID_dbus_property(self):

2105

return dbus.String(self.key_id)

2106

1498

2107

# Fingerprint - property

2108

@dbus_annotations(

2109

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

1499

2110

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

1500

2111

def Fingerprint_dbus_property(self):

1501

2112

return dbus.String(self.fingerprint)

1502

2113

1503

2114

# Host - property

1504

@dbus_service_property(_interface, signature="s",

2115

@dbus_service_property(_interface,

2116

signature="s",

1505

2117

access="readwrite")

1506

2118

def Host_dbus_property(self, value=None):

1507

2119

if value is None: # get

1508

2120

return dbus.String(self.host)

1509

self.host = unicode(value)

1510

2121

self.host = str(value)

2122

1511

2123

# Created - property

2124

@dbus_annotations(

2125

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

1512

2126

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

1513

2127

def Created_dbus_property(self):

1514

2128

return datetime_to_dbus(self.created)

1515

2129

1516

2130

# LastEnabled - property

1517

2131

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

1518

2132

def LastEnabled_dbus_property(self):

1519

2133

return datetime_to_dbus(self.last_enabled)

1520

2134

1521

2135

# Enabled - property

1522

@dbus_service_property(_interface, signature="b",

2136

@dbus_service_property(_interface,

2137

signature="b",

1523

2138

access="readwrite")

1524

2139

def Enabled_dbus_property(self, value=None):

1525

2140

if value is None: # get

1528

2143

self.enable()

1529

2144

else:

1530

2145

self.disable()

1531

2146

1532

2147

# LastCheckedOK - property

1533

@dbus_service_property(_interface, signature="s",

2148

@dbus_service_property(_interface,

2149

signature="s",

1534

2150

access="readwrite")

1535

2151

def LastCheckedOK_dbus_property(self, value=None):

1536

2152

if value is not None:

1537

2153

self.checked_ok()

1538

2154

return

1539

2155

return datetime_to_dbus(self.last_checked_ok)

1540

2156

1541

2157

# LastCheckerStatus - property

1542

@dbus_service_property(_interface, signature="n",

1543

access="read")

2158

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

1544

2159

def LastCheckerStatus_dbus_property(self):

1545

2160

return dbus.Int16(self.last_checker_status)

1546

2161

1547

2162

# Expires - property

1548

2163

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

1549

2164

def Expires_dbus_property(self):

1550

2165

return datetime_to_dbus(self.expires)

1551

2166

1552

2167

# LastApprovalRequest - property

1553

2168

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

1554

2169

def LastApprovalRequest_dbus_property(self):

1555

2170

return datetime_to_dbus(self.last_approval_request)

1556

2171

1557

2172

# Timeout - property

1558

@dbus_service_property(_interface, signature="t",

2173

@dbus_service_property(_interface,

2174

signature="t",

1559

2175

access="readwrite")

1560

2176

def Timeout_dbus_property(self, value=None):

1561

2177

if value is None: # get

1562

return dbus.UInt64(self.timeout_milliseconds())

2178

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

1563

2179

old_timeout = self.timeout

1564

2180

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

1565

2181

# Reschedule disabling

1573

2189

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

1574

2190

is None):

1575

2191

return

1576

gobject.source_remove(self.disable_initiator_tag)

1577

self.disable_initiator_tag = (

1578

gobject.timeout_add(

1579

timedelta_to_milliseconds(self.expires - now),

1580

self.disable))

1581

2192

GLib.source_remove(self.disable_initiator_tag)

2193

self.disable_initiator_tag = GLib.timeout_add(

2194

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

2195

self.disable)

2196

1582

2197

# ExtendedTimeout - property

1583

@dbus_service_property(_interface, signature="t",

2198

@dbus_service_property(_interface,

2199

signature="t",

1584

2200

access="readwrite")

1585

2201

def ExtendedTimeout_dbus_property(self, value=None):

1586

2202

if value is None: # get

1587

return dbus.UInt64(self.extended_timeout_milliseconds())

2203

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

2204

* 1000)

1588

2205

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

1589

2206

1590

2207

# Interval - property

1591

@dbus_service_property(_interface, signature="t",

2208

@dbus_service_property(_interface,

2209

signature="t",

1592

2210

access="readwrite")

1593

2211

def Interval_dbus_property(self, value=None):

1594

2212

if value is None: # get

1595

return dbus.UInt64(self.interval_milliseconds())

2213

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

1596

2214

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

1597

2215

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

1598

2216

return

1599

2217

if self.enabled:

1600

2218

# Reschedule checker run

1601

gobject.source_remove(self.checker_initiator_tag)

1602

self.checker_initiator_tag = (gobject.timeout_add

1603

(value, self.start_checker))

1604

self.start_checker() # Start one now, too

1605

2219

GLib.source_remove(self.checker_initiator_tag)

2220

self.checker_initiator_tag = GLib.timeout_add(

2221

value, self.start_checker)

2222

self.start_checker() # Start one now, too

2223

1606

2224

# Checker - property

1607

@dbus_service_property(_interface, signature="s",

2225

@dbus_service_property(_interface,

2226

signature="s",

1608

2227

access="readwrite")

1609

2228

def Checker_dbus_property(self, value=None):

1610

2229

if value is None: # get

1611

2230

return dbus.String(self.checker_command)

1612

self.checker_command = unicode(value)

1613

2231

self.checker_command = str(value)

2232

1614

2233

# CheckerRunning - property

1615

@dbus_service_property(_interface, signature="b",

2234

@dbus_service_property(_interface,

2235

signature="b",

1616

2236

access="readwrite")

1617

2237

def CheckerRunning_dbus_property(self, value=None):

1618

2238

if value is None: # get

1621

2241

self.start_checker()

1622

2242

else:

1623

2243

self.stop_checker()

1624

2244

1625

2245

# ObjectPath - property

2246

@dbus_annotations(

2247

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

2248

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

1626

2249

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

1627

2250

def ObjectPath_dbus_property(self):

1628

return self.dbus_object_path # is already a dbus.ObjectPath

1629

2251

return self.dbus_object_path # is already a dbus.ObjectPath

2252

1630

2253

# Secret = property

1631

@dbus_service_property(_interface, signature="ay",

1632

access="write", byte_arrays=True)

2254

@dbus_annotations(

2255

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

2256

"invalidates"})

2257

@dbus_service_property(_interface,

2258

signature="ay",

2259

access="write",

2260

byte_arrays=True)

1633

2261

def Secret_dbus_property(self, value):

1634

self.secret = str(value)

1635

2262

self.secret = bytes(value)

2263

1636

2264

del _interface

1637

2265

1638

2266

1639

class ProxyClient(object):

1640

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

2267

class ProxyClient:

2268

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

1641

2269

self._pipe = child_pipe

1642

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

2270

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

1643

2271

if not self._pipe.recv():

1644

raise KeyError()

1645

2272

raise KeyError(key_id or fpr)

2273

1646

2274

def __getattribute__(self, name):

1647

if name == '_pipe':

2275

if name == "_pipe":

1648

2276

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

1649

self._pipe.send(('getattr', name))

2277

self._pipe.send(("getattr", name))

1650

2278

data = self._pipe.recv()

1651

if data[0] == 'data':

2279

if data[0] == "data":

1652

2280

return data[1]

1653

if data[0] == 'function':

2281

if data[0] == "function":

2282

1654

2283

def func(*args, **kwargs):

1655

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

2284

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

1656

2285

return self._pipe.recv()[1]

2286

1657

2287

return func

1658

2288

1659

2289

def __setattr__(self, name, value):

1660

if name == '_pipe':

2290

if name == "_pipe":

1661

2291

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

1662

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

2292

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

1663

2293

1664

2294

1665

2295

class ClientHandler(socketserver.BaseRequestHandler, object):

1666

2296

"""A class to handle client connections.

1667

2297

1668

2298

Instantiated once for each connection to handle it.

1669

2299

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

1670

2300

1671

2301

def handle(self):

1672

2302

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

1673

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

1674

unicode(self.client_address))

1675

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

1676

self.server.child_pipe.fileno())

1677

1678

session = (gnutls.connection

1679

.ClientSession(self.request,

1680

gnutls.connection

1681

.X509Credentials()))

1682

1683

# Note: gnutls.connection.X509Credentials is really a

1684

# generic GnuTLS certificate credentials object so long as

1685

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

1686

# here despite using OpenPGP certificates.

1687

1688

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

1689

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

1690

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

1691

# "+DHE-DSS"))

2303

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

2304

str(self.client_address))

2305

log.debug("Pipe FD: %d", self.server.child_pipe.fileno())

2306

2307

session = gnutls.ClientSession(self.request)

2308

2309

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

2310

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

2311

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

2312

# "+DHE-DSS"))

1692

2313

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

1693

2314

priority = self.server.gnutls_priority

1694

2315

if priority is None:

1695

2316

priority = "NORMAL"

1696

(gnutls.library.functions

1697

.gnutls_priority_set_direct(session._c_object,

1698

priority, None))

1699

2317

gnutls.priority_set_direct(session,

2318

priority.encode("utf-8"), None)

2319

1700

2320

# Start communication using the Mandos protocol

1701

2321

# Get protocol number

1702

2322

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

1703

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

2323

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

1704

2324

try:

1705

2325

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

1706

2326

raise RuntimeError(line)

1707

2327

except (ValueError, IndexError, RuntimeError) as error:

1708

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

2328

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

1709

2329

return

1710

2330

1711

2331

# Start GnuTLS connection

1712

2332

try:

1713

2333

session.handshake()

1714

except gnutls.errors.GNUTLSError as error:

1715

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

2334

except gnutls.Error as error:

2335

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

1716

2336

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

1717

2337

# established. Just abandon the request.

1718

2338

return

1719

logger.debug("Handshake succeeded")

1720

2339

log.debug("Handshake succeeded")

2340

1721

2341

approval_required = False

1722

2342

try:

1723

try:

1724

fpr = self.fingerprint(self.peer_certificate

1725

(session))

1726

except (TypeError,

1727

gnutls.errors.GNUTLSError) as error:

1728

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

1729

return

1730

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

1731

1732

try:

1733

client = ProxyClient(child_pipe, fpr,

2343

if gnutls.has_rawpk:

2344

fpr = b""

2345

try:

2346

key_id = self.key_id(

2347

self.peer_certificate(session))

2348

except (TypeError, gnutls.Error) as error:

2349

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

2350

return

2351

log.debug("Key ID: %s",

2352

key_id.decode("utf-8",

2353

errors="replace"))

2354

2355

else:

2356

key_id = b""

2357

try:

2358

fpr = self.fingerprint(

2359

self.peer_certificate(session))

2360

except (TypeError, gnutls.Error) as error:

2361

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

2362

return

2363

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

2364

2365

try:

2366

client = ProxyClient(child_pipe, key_id, fpr,

1734

2367

self.client_address)

1735

2368

except KeyError:

1736

2369

return

1737

2370

1738

2371

if client.approval_delay:

1739

2372

delay = client.approval_delay

1740

2373

client.approvals_pending += 1

1741

2374

approval_required = True

1742

2375

1743

2376

while True:

1744

2377

if not client.enabled:

1745

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

1746

client.name)

2378

log.info("Client %s is disabled", client.name)

1747

2379

if self.server.use_dbus:

1748

2380

# Emit D-Bus signal

1749

2381

client.Rejected("Disabled")

1750

2382

return

1751

2383

1752

2384

if client.approved or not client.approval_delay:

1753

#We are approved or approval is disabled

2385

# We are approved or approval is disabled

1754

2386

break

1755

2387

elif client.approved is None:

1756

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

2388

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

2389

client.name)

2390

if self.server.use_dbus:

2391

# Emit D-Bus signal

2392

client.NeedApproval(

2393

client.approval_delay.total_seconds()

2394

* 1000, client.approved_by_default)

2395

else:

2396

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

1757

2397

client.name)

1758

2398

if self.server.use_dbus:

1759

2399

# Emit D-Bus signal

1760

client.NeedApproval(

1761

client.approval_delay_milliseconds(),

1762

client.approved_by_default)

1763

else:

1764

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

1765

client.name)

1766

if self.server.use_dbus:

1767

# Emit D-Bus signal

1768

2400

client.Rejected("Denied")

1769

2401

return

1770

1771

#wait until timeout or approved

2402

2403

# wait until timeout or approved

1772

2404

time = datetime.datetime.now()

1773

2405

client.changedstate.acquire()

1774

client.changedstate.wait(

1775

float(timedelta_to_milliseconds(delay)

1776

/ 1000))

2406

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

1777

2407

client.changedstate.release()

1778

2408

time2 = datetime.datetime.now()

1779

2409

if (time2 - time) >= delay:

1780

2410

if not client.approved_by_default:

1781

logger.warning("Client %s timed out while"

1782

" waiting for approval",

1783

client.name)

2411

log.warning("Client %s timed out while"

2412

" waiting for approval",

2413

client.name)

1784

2414

if self.server.use_dbus:

1785

2415

# Emit D-Bus signal

1786

2416

client.Rejected("Approval timed out")

1789

2419

break

1790

2420

else:

1791

2421

delay -= time2 - time

1792

1793

sent_size = 0

1794

while sent_size < len(client.secret):

1795

try:

1796

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

1797

except gnutls.errors.GNUTLSError as error:

1798

logger.warning("gnutls send failed",

1799

exc_info=error)

1800

return

1801

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

1802

sent, len(client.secret)

1803

- (sent_size + sent))

1804

sent_size += sent

1805

1806

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

2422

2423

try:

2424

session.send(client.secret)

2425

except gnutls.Error as error:

2426

log.warning("gnutls send failed", exc_info=error)

2427

return

2428

2429

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

1807

2430

# bump the timeout using extended_timeout

1808

2431

client.bump_timeout(client.extended_timeout)

1809

2432

if self.server.use_dbus:

1810

2433

# Emit D-Bus signal

1811

2434

client.GotSecret()

1812

2435

1813

2436

finally:

1814

2437

if approval_required:

1815

2438

client.approvals_pending -= 1

1816

2439

try:

1817

2440

session.bye()

1818

except gnutls.errors.GNUTLSError as error:

1819

logger.warning("GnuTLS bye failed",

1820

exc_info=error)

1821

2441

except gnutls.Error as error:

2442

log.warning("GnuTLS bye failed", exc_info=error)

2443

1822

2444

@staticmethod

1823

2445

def peer_certificate(session):

1824

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

1825

# If not an OpenPGP certificate...

1826

if (gnutls.library.functions

1827

.gnutls_certificate_type_get(session._c_object)

1828

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1829

# ...do the normal thing

1830

return session.peer_certificate

2446

"Return the peer's certificate as a bytestring"

2447

try:

2448

cert_type = gnutls.certificate_type_get2(

2449

session, gnutls.CTYPE_PEERS)

2450

except AttributeError:

2451

cert_type = gnutls.certificate_type_get(session)

2452

if gnutls.has_rawpk:

2453

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2454

else:

2455

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2456

# If not a valid certificate type...

2457

if cert_type not in valid_cert_types:

2458

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

2459

valid_cert_types)

2460

# ...return invalid data

2461

return b""

1831

2462

list_size = ctypes.c_uint(1)

1832

cert_list = (gnutls.library.functions

1833

.gnutls_certificate_get_peers

1834

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

2463

cert_list = (gnutls.certificate_get_peers

2464

(session, ctypes.byref(list_size)))

1835

2465

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

1836

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

1837

" certificate")

2466

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

1838

2467

if list_size.value == 0:

1839

2468

return None

1840

2469

cert = cert_list[0]

1841

2470

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

1842

2471

2472

@staticmethod

2473

def key_id(certificate):

2474

"Convert a certificate bytestring to a hexdigit key ID"

2475

# New GnuTLS "datum" with the public key

2476

datum = gnutls.datum_t(

2477

ctypes.cast(ctypes.c_char_p(certificate),

2478

ctypes.POINTER(ctypes.c_ubyte)),

2479

ctypes.c_uint(len(certificate)))

2480

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

2481

# New empty GnuTLS certificate

2482

pubkey = gnutls.pubkey_t()

2483

gnutls.pubkey_init(ctypes.byref(pubkey))

2484

# Import the raw public key into the certificate

2485

gnutls.pubkey_import(pubkey,

2486

ctypes.byref(datum),

2487

gnutls.X509_FMT_DER)

2488

# New buffer for the key ID

2489

buf = ctypes.create_string_buffer(32)

2490

buf_len = ctypes.c_size_t(len(buf))

2491

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

2492

gnutls.pubkey_get_key_id(

2493

pubkey,

2494

gnutls.KEYID_USE_SHA256,

2495

ctypes.cast(ctypes.byref(buf),

2496

ctypes.POINTER(ctypes.c_ubyte)),

2497

ctypes.byref(buf_len))

2498

# Deinit the certificate

2499

gnutls.pubkey_deinit(pubkey)

2500

2501

# Convert the buffer to a Python bytestring

2502

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

2503

# Convert the bytestring to hexadecimal notation

2504

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

2505

return hex_key_id

2506

1843

2507

@staticmethod

1844

2508

def fingerprint(openpgp):

1845

2509

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1846

2510

# New GnuTLS "datum" with the OpenPGP public key

1847

datum = (gnutls.library.types

1848

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

1849

ctypes.POINTER

1850

(ctypes.c_ubyte)),

1851

ctypes.c_uint(len(openpgp))))

2511

datum = gnutls.datum_t(

2512

ctypes.cast(ctypes.c_char_p(openpgp),

2513

ctypes.POINTER(ctypes.c_ubyte)),

2514

ctypes.c_uint(len(openpgp)))

1852

2515

# New empty GnuTLS certificate

1853

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1854

(gnutls.library.functions

1855

.gnutls_openpgp_crt_init(ctypes.byref(crt)))

2516

crt = gnutls.openpgp_crt_t()

2517

gnutls.openpgp_crt_init(ctypes.byref(crt))

1856

2518

# Import the OpenPGP public key into the certificate

1857

(gnutls.library.functions

1858

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

1859

gnutls.library.constants

1860

.GNUTLS_OPENPGP_FMT_RAW))

2519

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

2520

gnutls.OPENPGP_FMT_RAW)

1861

2521

# Verify the self signature in the key

1862

2522

crtverify = ctypes.c_uint()

1863

(gnutls.library.functions

1864

.gnutls_openpgp_crt_verify_self(crt, 0,

1865

ctypes.byref(crtverify)))

2523

gnutls.openpgp_crt_verify_self(crt, 0,

2524

ctypes.byref(crtverify))

1866

2525

if crtverify.value != 0:

1867

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1868

raise (gnutls.errors.CertificateSecurityError

1869

("Verify failed"))

2526

gnutls.openpgp_crt_deinit(crt)

2527

raise gnutls.CertificateSecurityError(code

2528

=crtverify.value)

1870

2529

# New buffer for the fingerprint

1871

2530

buf = ctypes.create_string_buffer(20)

1872

2531

buf_len = ctypes.c_size_t()

1873

2532

# Get the fingerprint from the certificate into the buffer

1874

(gnutls.library.functions

1875

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

1876

ctypes.byref(buf_len)))

2533

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

2534

ctypes.byref(buf_len))

1877

2535

# Deinit the certificate

1878

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2536

gnutls.openpgp_crt_deinit(crt)

1879

2537

# Convert the buffer to a Python bytestring

1880

2538

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

1881

2539

# Convert the bytestring to hexadecimal notation

1883

2541

return hex_fpr

1884

2542

1885

2543

1886

class MultiprocessingMixIn(object):

2544

class MultiprocessingMixIn:

1887

2545

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

2546

1888

2547

def sub_process_main(self, request, address):

1889

2548

try:

1890

2549

self.finish_request(request, address)

1891

2550

except Exception:

1892

2551

self.handle_error(request, address)

1893

2552

self.close_request(request)

1894

2553

1895

2554

def process_request(self, request, address):

1896

2555

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

1897

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

1898

args = (request, address))

2556

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

2557

args=(request, address))

1899

2558

proc.start()

1900

2559

return proc

1901

2560

1902

2561

1903

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2562

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

1904

2563

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

2564

1905

2565

def process_request(self, request, client_address):

1906

2566

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

1907

2567

1908

2568

This function creates a new pipe in self.pipe

1909

2569

"""

1910

2570

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1911

2571

1912

2572

proc = MultiprocessingMixIn.process_request(self, request,

1913

2573

client_address)

1914

2574

self.child_pipe.close()

1915

2575

self.add_pipe(parent_pipe, proc)

1916

2576

1917

2577

def add_pipe(self, parent_pipe, proc):

1918

2578

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

1919

2579

raise NotImplementedError()

1920

2580

1921

2581

1922

2582

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1923

socketserver.TCPServer, object):

1924

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

1925

2583

socketserver.TCPServer):

2584

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

2585

1926

2586

Attributes:

1927

2587

enabled: Boolean; whether this server is activated yet

1928

2588

interface: None or a network interface name (string)

1929

2589

use_ipv6: Boolean; to use IPv6 or not

1930

2590

"""

2591

1931

2592

def __init__(self, server_address, RequestHandlerClass,

1932

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

2593

interface=None,

2594

use_ipv6=True,

2595

socketfd=None):

1933

2596

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

1934

2597

creating a new one with socket.socket().

1935

2598

"""

1941

2604

self.socketfd = socketfd

1942

2605

# Save the original socket.socket() function

1943

2606

self.socket_socket = socket.socket

2607

1944

2608

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

1945

#

2609

#

1946

2610

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

1947

2611

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

1948

2612

# patching socket.socket.)

1949

#

2613

#

1950

2614

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

1951

2615

@functools.wraps(socket.socket)

1952

2616

def socket_wrapper(*args, **kwargs):

1964

2628

# socket_wrapper(), if socketfd was set.

1965

2629

socketserver.TCPServer.__init__(self, server_address,

1966

2630

RequestHandlerClass)

1967

2631

1968

2632

def server_bind(self):

1969

2633

"""This overrides the normal server_bind() function

1970

2634

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

1971

2635

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

2636

global SO_BINDTODEVICE

1972

2637

if self.interface is not None:

1973

2638

if SO_BINDTODEVICE is None:

1974

logger.error("SO_BINDTODEVICE does not exist;"

1975

" cannot bind to interface %s",

1976

self.interface)

1977

else:

1978

try:

1979

self.socket.setsockopt(socket.SOL_SOCKET,

1980

SO_BINDTODEVICE,

1981

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

1982

except socket.error as error:

1983

if error.errno == errno.EPERM:

1984

logger.error("No permission to bind to"

1985

" interface %s", self.interface)

1986

elif error.errno == errno.ENOPROTOOPT:

1987

logger.error("SO_BINDTODEVICE not available;"

1988

" cannot bind to interface %s",

1989

self.interface)

1990

elif error.errno == errno.ENODEV:

1991

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

1992

" cannot bind", self.interface)

1993

else:

1994

raise

2639

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

2640

# common enough.

2641

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

2642

SO_BINDTODEVICE = 25

2643

try:

2644

self.socket.setsockopt(

2645

socket.SOL_SOCKET, SO_BINDTODEVICE,

2646

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

2647

except socket.error as error:

2648

if error.errno == errno.EPERM:

2649

log.error("No permission to bind to interface %s",

2650

self.interface)

2651

elif error.errno == errno.ENOPROTOOPT:

2652

log.error("SO_BINDTODEVICE not available; cannot"

2653

" bind to interface %s", self.interface)

2654

elif error.errno == errno.ENODEV:

2655

log.error("Interface %s does not exist, cannot"

2656

" bind", self.interface)

2657

else:

2658

raise

1995

2659

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

1996

2660

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

2661

if self.server_address[1]:

2662

self.allow_reuse_address = True

1997

2663

if not self.server_address[0]:

1998

2664

if self.address_family == socket.AF_INET6:

1999

any_address = "::" # in6addr_any

2665

any_address = "::" # in6addr_any

2000

2666

else:

2001

any_address = "0.0.0.0" # INADDR_ANY

2667

any_address = "0.0.0.0" # INADDR_ANY

2002

2668

self.server_address = (any_address,

2003

2669

self.server_address[1])

2004

2670

elif not self.server_address[1]:

2005

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

2006

0)

2671

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

2007

2672

# if self.interface:

2008

2673

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

2009

2674

# 0, # port

2015

2680

2016

2681

class MandosServer(IPv6_TCPServer):

2017

2682

"""Mandos server.

2018

2683

2019

2684

Attributes:

2020

2685

clients: set of Client objects

2021

2686

gnutls_priority GnuTLS priority string

2022

2687

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

2023

2024

Assumes a gobject.MainLoop event loop.

2688

2689

Assumes a GLib.MainLoop event loop.

2025

2690

"""

2691

2026

2692

def __init__(self, server_address, RequestHandlerClass,

2027

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

2028

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

2693

interface=None,

2694

use_ipv6=True,

2695

clients=None,

2696

gnutls_priority=None,

2697

use_dbus=True,

2698

socketfd=None):

2029

2699

self.enabled = False

2030

2700

self.clients = clients

2031

2701

if self.clients is None:

2034

2704

self.gnutls_priority = gnutls_priority

2035

2705

IPv6_TCPServer.__init__(self, server_address,

2036

2706

RequestHandlerClass,

2037

interface = interface,

2038

use_ipv6 = use_ipv6,

2039

socketfd = socketfd)

2707

interface=interface,

2708

use_ipv6=use_ipv6,

2709

socketfd=socketfd)

2710

2040

2711

def server_activate(self):

2041

2712

if self.enabled:

2042

2713

return socketserver.TCPServer.server_activate(self)

2043

2714

2044

2715

def enable(self):

2045

2716

self.enabled = True

2046

2717

2047

2718

def add_pipe(self, parent_pipe, proc):

2048

2719

# Call "handle_ipc" for both data and EOF events

2049

gobject.io_add_watch(parent_pipe.fileno(),

2050

gobject.IO_IN | gobject.IO_HUP,

2051

functools.partial(self.handle_ipc,

2052

parent_pipe =

2053

parent_pipe,

2054

proc = proc))

2055

2056

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

2057

proc = None, client_object=None):

2720

GLib.io_add_watch(

2721

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

2722

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

2723

functools.partial(self.handle_ipc,

2724

parent_pipe=parent_pipe,

2725

proc=proc))

2726

2727

def handle_ipc(self, source, condition,

2728

parent_pipe=None,

2729

proc=None,

2730

client_object=None):

2058

2731

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

2059

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

2732

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

2060

2733

# Wait for other process to exit

2061

2734

proc.join()

2062

2735

return False

2063

2736

2064

2737

# Read a request from the child

2065

2738

request = parent_pipe.recv()

2066

2739

command = request[0]

2067

2068

if command == 'init':

2069

fpr = request[1]

2070

address = request[2]

2071

2072

for c in self.clients.itervalues():

2073

if c.fingerprint == fpr:

2740

2741

if command == "init":

2742

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

2743

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

2744

address = request[3]

2745

2746

for c in self.clients.values():

2747

if key_id == ("E3B0C44298FC1C149AFBF4C8996FB924"

2748

"27AE41E4649B934CA495991B7852B855"):

2749

continue

2750

if key_id and c.key_id == key_id:

2751

client = c

2752

break

2753

if fpr and c.fingerprint == fpr:

2074

2754

client = c

2075

2755

break

2076

2756

else:

2077

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

2078

"dress: %s", fpr, address)

2757

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

2758

" %s", key_id or fpr, address)

2079

2759

if self.use_dbus:

2080

2760

# Emit D-Bus signal

2081

mandos_dbus_service.ClientNotFound(fpr,

2761

mandos_dbus_service.ClientNotFound(key_id or fpr,

2082

2762

address[0])

2083

2763

parent_pipe.send(False)

2084

2764

return False

2085

2086

gobject.io_add_watch(parent_pipe.fileno(),

2087

gobject.IO_IN | gobject.IO_HUP,

2088

functools.partial(self.handle_ipc,

2089

parent_pipe =

2090

parent_pipe,

2091

proc = proc,

2092

client_object =

2093

client))

2765

2766

GLib.io_add_watch(

2767

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

2768

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

2769

functools.partial(self.handle_ipc,

2770

parent_pipe=parent_pipe,

2771

proc=proc,

2772

client_object=client))

2094

2773

parent_pipe.send(True)

2095

2774

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

2096

2775

# same fileno

2097

2776

return False

2098

if command == 'funcall':

2777

if command == "funcall":

2099

2778

funcname = request[1]

2100

2779

args = request[2]

2101

2780

kwargs = request[3]

2102

2103

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

2781

2782

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

2104

2783

funcname)(*args,

2105

**kwargs)))

2106

2107

if command == 'getattr':

2784

**kwargs)))

2785

2786

if command == "getattr":

2108

2787

attrname = request[1]

2109

if callable(client_object.__getattribute__(attrname)):

2110

parent_pipe.send(('function',))

2788

if isinstance(client_object.__getattribute__(attrname),

2789

collections.abc.Callable):

2790

parent_pipe.send(("function", ))

2111

2791

else:

2112

parent_pipe.send(('data', client_object

2113

.__getattribute__(attrname)))

2114

2115

if command == 'setattr':

2792

parent_pipe.send((

2793

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

2794

2795

if command == "setattr":

2116

2796

attrname = request[1]

2117

2797

value = request[2]

2118

2798

setattr(client_object, attrname, value)

2119

2799

2120

2800

return True

2121

2801

2122

2802

2123

2803

def rfc3339_duration_to_delta(duration):

2124

2804

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

2125

2126

>>> rfc3339_duration_to_delta("P7D")

2127

datetime.timedelta(7)

2128

>>> rfc3339_duration_to_delta("PT60S")

2129

datetime.timedelta(0, 60)

2130

>>> rfc3339_duration_to_delta("PT60M")

2131

datetime.timedelta(0, 3600)

2132

>>> rfc3339_duration_to_delta("PT24H")

2133

datetime.timedelta(1)

2134

>>> rfc3339_duration_to_delta("P1W")

2135

datetime.timedelta(7)

2136

>>> rfc3339_duration_to_delta("PT5M30S")

2137

datetime.timedelta(0, 330)

2138

>>> rfc3339_duration_to_delta("P1DT3M20S")

2139

datetime.timedelta(1, 200)

2805

2806

>>> timedelta = datetime.timedelta

2807

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

2808

True

2809

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

2810

True

2811

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

2812

True

2813

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

2814

True

2815

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

2816

True

2817

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

2818

True

2819

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

2820

True

2821

>>> del timedelta

2140

2822

"""

2141

2823

2142

2824

# Parsing an RFC 3339 duration with regular expressions is not

2143

2825

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

2144

2826

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

2145

2827

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

2146

2828

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

2147

2829

# avoid excessive use of external libraries.

2148

2830

2149

2831

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

2150

Token = collections.namedtuple("Token",

2151

("regexp", # To match token; if

2152

# "value" is not None,

2153

# must have a "group"

2154

# containing digits

2155

"value", # datetime.timedelta or

2156

# None

2157

"followers")) # Tokens valid after

2158

# this token

2832

Token = collections.namedtuple("Token", (

2833

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

2834

# a "group" containing digits

2835

"value", # datetime.timedelta or None

2836

"followers")) # Tokens valid after this token

2159

2837

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

2160

2838

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

2161

2839

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

2162

2840

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

2163

2841

datetime.timedelta(seconds=1),

2164

frozenset((token_end,)))

2842

frozenset((token_end, )))

2165

2843

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

2166

2844

datetime.timedelta(minutes=1),

2167

2845

frozenset((token_second, token_end)))

2183

2861

frozenset((token_month, token_end)))

2184

2862

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

2185

2863

datetime.timedelta(weeks=1),

2186

frozenset((token_end,)))

2864

frozenset((token_end, )))

2187

2865

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

2188

2866

frozenset((token_year, token_month,

2189

2867

token_day, token_time,

2190

token_week))),

2191

# Define starting values

2192

value = datetime.timedelta() # Value so far

2868

token_week)))

2869

# Define starting values:

2870

# Value so far

2871

value = datetime.timedelta()

2193

2872

found_token = None

2194

followers = frozenset(token_duration,) # Following valid tokens

2195

s = duration # String left to parse

2873

# Following valid tokens

2874

followers = frozenset((token_duration, ))

2875

# String left to parse

2876

s = duration

2196

2877

# Loop until end token is found

2197

2878

while found_token is not token_end:

2198

2879

# Search for any currently valid tokens

2214

2895

break

2215

2896

else:

2216

2897

# No currently valid tokens were found

2217

raise ValueError("Invalid RFC 3339 duration")

2898

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

2899

.format(duration))

2218

2900

# End token found

2219

2901

return value

2220

2902

2221

2903

2222

2904

def string_to_delta(interval):

2223

2905

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

2224

2225

>>> string_to_delta('7d')

2226

datetime.timedelta(7)

2227

>>> string_to_delta('60s')

2228

datetime.timedelta(0, 60)

2229

>>> string_to_delta('60m')

2230

datetime.timedelta(0, 3600)

2231

>>> string_to_delta('24h')

2232

datetime.timedelta(1)

2233

>>> string_to_delta('1w')

2234

datetime.timedelta(7)

2235

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

2236

datetime.timedelta(0, 330)

2906

2907

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

2908

True

2909

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

2910

True

2911

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

2912

True

2913

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

2914

True

2915

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

2916

True

2917

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

2918

True

2237

2919

"""

2238

2920

2239

2921

try:

2240

2922

return rfc3339_duration_to_delta(interval)

2241

2923

except ValueError:

2242

2924

pass

2243

2925

2244

2926

timevalue = datetime.timedelta(0)

2245

2927

for s in interval.split():

2246

2928

try:

2247

suffix = unicode(s[-1])

2929

suffix = s[-1]

2248

2930

value = int(s[:-1])

2249

2931

if suffix == "d":

2250

2932

delta = datetime.timedelta(value)

2257

2939

elif suffix == "w":

2258

2940

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

2259

2941

else:

2260

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

2261

.format(suffix))

2942

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

2262

2943

except IndexError as e:

2263

2944

raise ValueError(*(e.args))

2264

2945

timevalue += delta

2265

2946

return timevalue

2266

2947

2267

2948

2268

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

2949

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

2269

2950

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

2270

2951

2271

2952

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

2272

2953

if os.fork():

2273

2954

sys.exit()

2281

2962

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

2282

2963

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

2283

2964

raise OSError(errno.ENODEV,

2284

"{0} not a character device"

2965

"{} not a character device"

2285

2966

.format(os.devnull))

2286

2967

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

2287

2968

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

2291

2972

2292

2973

2293

2974

def main():

2294

2975

2295

2976

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

2296

2977

# Parsing of options, both command line and config file

2297

2978

2298

2979

parser = argparse.ArgumentParser()

2299

2980

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

2300

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

2981

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

2301

2982

help="show version number and exit")

2302

2983

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

2303

2984

help="Bind to interface IF")

2336

3017

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

2337

3018

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

2338

3019

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

2339

3020

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

3021

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

3022

default=None)

3023

2340

3024

options = parser.parse_args()

2341

2342

if options.check:

2343

import doctest

2344

doctest.testmod()

2345

sys.exit()

2346

3025

2347

3026

# Default values for config file for server-global settings

2348

server_defaults = { "interface": "",

2349

"address": "",

2350

"port": "",

2351

"debug": "False",

2352

"priority":

2353

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

2354

"servicename": "Mandos",

2355

"use_dbus": "True",

2356

"use_ipv6": "True",

2357

"debuglevel": "",

2358

"restore": "True",

2359

"socket": "",

2360

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

2361

"foreground": "False",

2362

}

2363

3027

if gnutls.has_rawpk:

3028

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

3029

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

3030

else:

3031

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

3032

":+SIGN-DSA-SHA256")

3033

server_defaults = {"interface": "",

3034

"address": "",

3035

"port": "",

3036

"debug": "False",

3037

"priority": priority,

3038

"servicename": "Mandos",

3039

"use_dbus": "True",

3040

"use_ipv6": "True",

3041

"debuglevel": "",

3042

"restore": "True",

3043

"socket": "",

3044

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

3045

"foreground": "False",

3046

"zeroconf": "True",

3047

}

3048

del priority

3049

2364

3050

# Parse config file for server-global settings

2365

server_config = configparser.SafeConfigParser(server_defaults)

3051

server_config = configparser.ConfigParser(server_defaults)

2366

3052

del server_defaults

2367

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

2368

"mandos.conf"))

2369

# Convert the SafeConfigParser object to a dict

3053

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

3054

# Convert the ConfigParser object to a dict

2370

3055

server_settings = server_config.defaults()

2371

3056

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

2372

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

3057

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

3058

"foreground", "zeroconf"):

2373

3059

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

2374

3060

option)

2375

3061

if server_settings["port"]:

2385

3071

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

2386

3072

["socket"])

2387

3073

del server_config

2388

3074

2389

3075

# Override the settings from the config file with command line

2390

3076

# options, if set.

2391

3077

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

2392

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

2393

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

2394

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

3078

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

3079

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

3080

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

2395

3081

value = getattr(options, option)

2396

3082

if value is not None:

2397

3083

server_settings[option] = value

2398

3084

del options

2399

3085

# Force all strings to be unicode

2400

3086

for option in server_settings.keys():

2401

if type(server_settings[option]) is str:

2402

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

3087

if isinstance(server_settings[option], bytes):

3088

server_settings[option] = (server_settings[option]

3089

.decode("utf-8"))

2403

3090

# Force all boolean options to be boolean

2404

3091

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

2405

"foreground"):

3092

"foreground", "zeroconf"):

2406

3093

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

2407

3094

# Debug implies foreground

2408

3095

if server_settings["debug"]:

2409

3096

server_settings["foreground"] = True

2410

3097

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

2411

3098

2412

3099

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

2413

3100

3101

if (not server_settings["zeroconf"]

3102

and not (server_settings["port"]

3103

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

3104

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

3105

2414

3106

# For convenience

2415

3107

debug = server_settings["debug"]

2416

3108

debuglevel = server_settings["debuglevel"]

2419

3111

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

2420

3112

stored_state_file)

2421

3113

foreground = server_settings["foreground"]

2422

3114

zeroconf = server_settings["zeroconf"]

3115

2423

3116

if debug:

2424

3117

initlogger(debug, logging.DEBUG)

2425

3118

else:

2428

3121

else:

2429

3122

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

2430

3123

initlogger(debug, level)

2431

3124

2432

3125

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

2433

syslogger.setFormatter(logging.Formatter

2434

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

2435

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

2436

.format(server_settings

2437

["servicename"])))

2438

3126

syslogger.setFormatter(

3127

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

3128

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

3129

server_settings["servicename"])))

3130

2439

3131

# Parse config file with clients

2440

client_config = configparser.SafeConfigParser(Client

2441

.client_defaults)

3132

client_config = configparser.ConfigParser(Client.client_defaults)

2442

3133

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

2443

3134

"clients.conf"))

2444

3135

2445

3136

global mandos_dbus_service

2446

3137

mandos_dbus_service = None

2447

2448

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

2449

server_settings["port"]),

2450

ClientHandler,

2451

interface=(server_settings["interface"]

2452

or None),

2453

use_ipv6=use_ipv6,

2454

gnutls_priority=

2455

server_settings["priority"],

2456

use_dbus=use_dbus,

2457

socketfd=(server_settings["socket"]

2458

or None))

3138

3139

socketfd = None

3140

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

3141

socketfd = server_settings["socket"]

3142

tcp_server = MandosServer(

3143

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

3144

ClientHandler,

3145

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

3146

use_ipv6=use_ipv6,

3147

gnutls_priority=server_settings["priority"],

3148

use_dbus=use_dbus,

3149

socketfd=socketfd)

2459

3150

if not foreground:

2460

3151

pidfilename = "/run/mandos.pid"

2461

3152

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

2462

3153

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

2463

3154

pidfile = None

2464

3155

try:

2465

pidfile = open(pidfilename, "w")

3156

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

2466

3157

except IOError as e:

2467

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

2468

exc_info=e)

2469

2470

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

3158

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

3159

exc_info=e)

3160

3161

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

3162

("mandos", "mandos"),

3163

("nobody", "nogroup")):

2471

3164

try:

2472

3165

uid = pwd.getpwnam(name).pw_uid

2473

gid = pwd.getpwnam(name).pw_gid

3166

gid = pwd.getpwnam(group).pw_gid

2474

3167

break

2475

3168

except KeyError:

2476

3169

continue

2480

3173

try:

2481

3174

os.setgid(gid)

2482

3175

os.setuid(uid)

3176

log.debug("Did setuid/setgid to %s:%s", uid, gid)

2483

3177

except OSError as error:

3178

log.warning("Failed to setuid/setgid to %s:%s: %s", uid, gid,

3179

os.strerror(error.errno))

2484

3180

if error.errno != errno.EPERM:

2485

3181

raise

2486

3182

2487

3183

if debug:

2488

3184

# Enable all possible GnuTLS debugging

2489

3185

2490

3186

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

2491

3187

# - GnuTLS manual

2492

gnutls.library.functions.gnutls_global_set_log_level(11)

2493

2494

@gnutls.library.types.gnutls_log_func

3188

gnutls.global_set_log_level(11)

3189

3190

@gnutls.log_func

2495

3191

def debug_gnutls(level, string):

2496

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

2497

2498

(gnutls.library.functions

2499

.gnutls_global_set_log_function(debug_gnutls))

2500

3192

log.debug("GnuTLS: %s",

3193

string[:-1].decode("utf-8", errors="replace"))

3194

3195

gnutls.global_set_log_function(debug_gnutls)

3196

2501

3197

# Redirect stdin so all checkers get /dev/null

2502

3198

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

2503

3199

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

2504

3200

if null > 2:

2505

3201

os.close(null)

2506

3202

2507

3203

# Need to fork before connecting to D-Bus

2508

3204

if not foreground:

2509

3205

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

2510

3206

daemon()

2511

2512

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

2513

# need to inform gobject that threads will be used.

2514

gobject.threads_init()

2515

3207

3208

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

3209

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

3210

# need to inform GLib that threads will be used.

3211

GLib.threads_init()

3212

2516

3213

global main_loop

2517

3214

# From the Avahi example code

2518

3215

DBusGMainLoop(set_as_default=True)

2519

main_loop = gobject.MainLoop()

3216

main_loop = GLib.MainLoop()

2520

3217

bus = dbus.SystemBus()

2521

3218

# End of Avahi example code

2522

3219

if use_dbus:

2523

3220

try:

2524

3221

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

2525

bus, do_not_queue=True)

2526

old_bus_name = (dbus.service.BusName

2527

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

2528

do_not_queue=True))

2529

except dbus.exceptions.NameExistsException as e:

2530

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

3222

bus,

3223

do_not_queue=True)

3224

old_bus_name = dbus.service.BusName(

3225

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

3226

do_not_queue=True)

3227

except dbus.exceptions.DBusException as e:

3228

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

2531

3229

use_dbus = False

2532

3230

server_settings["use_dbus"] = False

2533

3231

tcp_server.use_dbus = False

2534

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2535

service = AvahiServiceToSyslog(name =

2536

server_settings["servicename"],

2537

servicetype = "_mandos._tcp",

2538

protocol = protocol, bus = bus)

2539

if server_settings["interface"]:

2540

service.interface = (if_nametoindex

2541

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

2542

3232

if zeroconf:

3233

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3234

service = AvahiServiceToSyslog(

3235

name=server_settings["servicename"],

3236

servicetype="_mandos._tcp",

3237

protocol=protocol,

3238

bus=bus)

3239

if server_settings["interface"]:

3240

service.interface = if_nametoindex(

3241

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

3242

2543

3243

global multiprocessing_manager

2544

3244

multiprocessing_manager = multiprocessing.Manager()

2545

3245

2546

3246

client_class = Client

2547

3247

if use_dbus:

2548

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

2549

3248

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

3249

2550

3250

client_settings = Client.config_parser(client_config)

2551

3251

old_client_settings = {}

2552

3252

clients_data = {}

2553

3253

2554

3254

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

2555

3255

global wnull

2556

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

3256

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

2557

3257

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

2558

3258

# mode

2559

3259

if debug or not foreground:

2560

3260

wnull.close()

2561

3261

2562

3262

# Get client data and settings from last running state.

2563

3263

if server_settings["restore"]:

2564

3264

try:

2565

3265

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

2566

clients_data, old_client_settings = (pickle.load

2567

(stored_state))

3266

if sys.version_info.major == 2:

3267

clients_data, old_client_settings = pickle.load(

3268

stored_state)

3269

else:

3270

bytes_clients_data, bytes_old_client_settings = (

3271

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

3272

# Fix bytes to strings

3273

# clients_data

3274

# .keys()

3275

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

3276

if isinstance(key, bytes)

3277

else key): value

3278

for key, value in

3279

bytes_clients_data.items()}

3280

del bytes_clients_data

3281

for key in clients_data:

3282

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

3283

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

3284

for k, v in

3285

clients_data[key].items()}

3286

clients_data[key] = value

3287

# .client_structure

3288

value["client_structure"] = [

3289

(s.decode("utf-8")

3290

if isinstance(s, bytes)

3291

else s) for s in

3292

value["client_structure"]]

3293

# .name, .host, and .checker_command

3294

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

3295

if isinstance(value[k], bytes):

3296

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

3297

if "key_id" not in value:

3298

value["key_id"] = ""

3299

elif "fingerprint" not in value:

3300

value["fingerprint"] = ""

3301

# old_client_settings

3302

# .keys()

3303

old_client_settings = {

3304

(key.decode("utf-8")

3305

if isinstance(key, bytes)

3306

else key): value

3307

for key, value in

3308

bytes_old_client_settings.items()}

3309

del bytes_old_client_settings

3310

# .host and .checker_command

3311

for value in old_client_settings.values():

3312

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

3313

if isinstance(value[attribute], bytes):

3314

value[attribute] = (value[attribute]

3315

.decode("utf-8"))

2568

3316

os.remove(stored_state_path)

2569

3317

except IOError as e:

2570

3318

if e.errno == errno.ENOENT:

2571

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

2572

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

3319

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

3320

" %s", os.strerror(e.errno))

2573

3321

else:

2574

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

2575

exc_info=e)

3322

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

3323

exc_info=e)

2576

3324

raise

2577

3325

except EOFError as e:

2578

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

2579

"EOFError:", exc_info=e)

2580

3326

log.warning("Could not load persistent state: EOFError:",

3327

exc_info=e)

3328

2581

3329

with PGPEngine() as pgp:

2582

for client_name, client in clients_data.iteritems():

3330

for client_name, client in clients_data.items():

2583

3331

# Skip removed clients

2584

3332

if client_name not in client_settings:

2585

3333

continue

2586

3334

2587

3335

# Decide which value to use after restoring saved state.

2588

3336

# We have three different values: Old config file,

2589

3337

# new config file, and saved state.

2594

3342

# For each value in new config, check if it

2595

3343

# differs from the old config value (Except for

2596

3344

# the "secret" attribute)

2597

if (name != "secret" and

2598

value != old_client_settings[client_name]

2599

[name]):

3345

if (name != "secret"

3346

and (value !=

3347

old_client_settings[client_name][name])):

2600

3348

client[name] = value

2601

3349

except KeyError:

2602

3350

pass

2603

3351

2604

3352

# Clients who has passed its expire date can still be

2605

# enabled if its last checker was successful. Clients

3353

# enabled if its last checker was successful. A Client

2606

3354

# whose checker succeeded before we stored its state is

2607

3355

# assumed to have successfully run all checkers during

2608

3356

# downtime.

2609

3357

if client["enabled"]:

2610

3358

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

2611

3359

if not client["last_checked_ok"]:

2612

logger.warning(

2613

"disabling client {0} - Client never "

2614

"performed a successful checker"

2615

.format(client_name))

3360

log.warning("disabling client %s - Client"

3361

" never performed a successful"

3362

" checker", client_name)

2616

3363

client["enabled"] = False

2617

3364

elif client["last_checker_status"] != 0:

2618

logger.warning(

2619

"disabling client {0} - Client "

2620

"last checker failed with error code {1}"

2621

.format(client_name,

2622

client["last_checker_status"]))

3365

log.warning("disabling client %s - Client"

3366

" last checker failed with error"

3367

" code %s", client_name,

3368

client["last_checker_status"])

2623

3369

client["enabled"] = False

2624

3370

else:

2625

client["expires"] = (datetime.datetime

2626

.utcnow()

2627

+ client["timeout"])

2628

logger.debug("Last checker succeeded,"

2629

" keeping {0} enabled"

2630

.format(client_name))

3371

client["expires"] = (

3372

datetime.datetime.utcnow()

3373

+ client["timeout"])

3374

log.debug("Last checker succeeded, keeping %s"

3375

" enabled", client_name)

2631

3376

try:

2632

client["secret"] = (

2633

pgp.decrypt(client["encrypted_secret"],

2634

client_settings[client_name]

2635

["secret"]))

3377

client["secret"] = pgp.decrypt(

3378

client["encrypted_secret"],

3379

client_settings[client_name]["secret"])

2636

3380

except PGPError:

2637

3381

# If decryption fails, we use secret from new settings

2638

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

2639

.format(client_name))

2640

client["secret"] = (

2641

client_settings[client_name]["secret"])

2642

3382

log.debug("Failed to decrypt %s old secret",

3383

client_name)

3384

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

3385

["secret"])

3386

2643

3387

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

2644

3388

for client_name in (set(old_client_settings)

2645

3389

- set(client_settings)):

2647

3391

for client_name in (set(client_settings)

2648

3392

- set(old_client_settings)):

2649

3393

clients_data[client_name] = client_settings[client_name]

2650

3394

2651

3395

# Create all client objects

2652

for client_name, client in clients_data.iteritems():

3396

for client_name, client in clients_data.items():

2653

3397

tcp_server.clients[client_name] = client_class(

2654

name = client_name, settings = client,

2655

server_settings = server_settings)

2656

3398

name=client_name,

3399

settings=client,

3400

server_settings=server_settings)

3401

2657

3402

if not tcp_server.clients:

2658

logger.warning("No clients defined")

2659

3403

log.warning("No clients defined")

3404

2660

3405

if not foreground:

2661

3406

if pidfile is not None:

3407

pid = os.getpid()

2662

3408

try:

2663

3409

with pidfile:

2664

pid = os.getpid()

2665

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

3410

print(pid, file=pidfile)

2666

3411

except IOError:

2667

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

2668

pidfilename, pid)

3412

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

3413

pidfilename, pid)

2669

3414

del pidfile

2670

3415

del pidfilename

2671

2672

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

2673

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

2674

3416

3417

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

3418

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3419

lambda: main_loop.quit() and False)

3420

2675

3421

if use_dbus:

2676

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

2677

"se.bsnet.fukt.Mandos"})

2678

class MandosDBusService(DBusObjectWithProperties):

3422

3423

@alternate_dbus_interfaces(

3424

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

3425

class MandosDBusService(DBusObjectWithObjectManager):

2679

3426

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

3427

2680

3428

def __init__(self):

2681

3429

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

3430

2682

3431

_interface = "se.recompile.Mandos"

2683

2684

@dbus_interface_annotations(_interface)

2685

def _foo(self):

2686

return { "org.freedesktop.DBus.Property"

2687

".EmitsChangedSignal":

2688

"false"}

2689

3432

2690

3433

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

2691

3434

def ClientAdded(self, objpath):

2692

3435

"D-Bus signal"

2693

3436

pass

2694

3437

2695

3438

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

2696

def ClientNotFound(self, fingerprint, address):

3439

def ClientNotFound(self, key_id, address):

2697

3440

"D-Bus signal"

2698

3441

pass

2699

3442

3443

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

3444

"true"})

2700

3445

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

2701

3446

def ClientRemoved(self, objpath, name):

2702

3447

"D-Bus signal"

2703

3448

pass

2704

3449

3450

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

3451

"true"})

2705

3452

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

2706

3453

def GetAllClients(self):

2707

3454

"D-Bus method"

2708

return dbus.Array(c.dbus_object_path

2709

for c in

2710

tcp_server.clients.itervalues())

2711

3455

return dbus.Array(c.dbus_object_path for c in

3456

tcp_server.clients.values())

3457

3458

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

3459

"true"})

2712

3460

@dbus.service.method(_interface,

2713

3461

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

2714

3462

def GetAllClientsWithProperties(self):

2715

3463

"D-Bus method"

2716

3464

return dbus.Dictionary(

2717

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

2718

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

3465

{c.dbus_object_path: c.GetAll(

3466

"se.recompile.Mandos.Client")

3467

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

2719

3468

signature="oa{sv}")

2720

3469

2721

3470

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

2722

3471

def RemoveClient(self, object_path):

2723

3472

"D-Bus method"

2724

for c in tcp_server.clients.itervalues():

3473

for c in tcp_server.clients.values():

2725

3474

if c.dbus_object_path == object_path:

2726

3475

del tcp_server.clients[c.name]

2727

3476

c.remove_from_connection()

2728

# Don't signal anything except ClientRemoved

3477

# Don't signal the disabling

2729

3478

c.disable(quiet=True)

2730

# Emit D-Bus signal

2731

self.ClientRemoved(object_path, c.name)

3479

# Emit D-Bus signal for removal

3480

self.client_removed_signal(c)

2732

3481

return

2733

3482

raise KeyError(object_path)

2734

3483

2735

3484

del _interface

2736

3485

3486

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3487

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

3488

def GetManagedObjects(self):

3489

"""D-Bus method"""

3490

return dbus.Dictionary(

3491

{client.dbus_object_path:

3492

dbus.Dictionary(

3493

{interface: client.GetAll(interface)

3494

for interface in

3495

client._get_all_interface_names()})

3496

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

3497

3498

def client_added_signal(self, client):

3499

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

3500

if use_dbus:

3501

# New standard signal

3502

self.InterfacesAdded(

3503

client.dbus_object_path,

3504

dbus.Dictionary(

3505

{interface: client.GetAll(interface)

3506

for interface in

3507

client._get_all_interface_names()}))

3508

# Old signal

3509

self.ClientAdded(client.dbus_object_path)

3510

3511

def client_removed_signal(self, client):

3512

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

3513

if use_dbus:

3514

# New standard signal

3515

self.InterfacesRemoved(

3516

client.dbus_object_path,

3517

client._get_all_interface_names())

3518

# Old signal

3519

self.ClientRemoved(client.dbus_object_path,

3520

client.name)

3521

2737

3522

mandos_dbus_service = MandosDBusService()

2738

3523

3524

# Save modules to variables to exempt the modules from being

3525

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

3526

mp = multiprocessing

3527

wn = wnull

3528

2739

3529

def cleanup():

2740

3530

"Cleanup function; run on exit"

2741

service.cleanup()

2742

2743

multiprocessing.active_children()

2744

wnull.close()

3531

if zeroconf:

3532

service.cleanup()

3533

3534

mp.active_children()

3535

wn.close()

2745

3536

if not (tcp_server.clients or client_settings):

2746

3537

return

2747

3538

2748

3539

# Store client before exiting. Secrets are encrypted with key

2749

3540

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

2750

3541

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

2751

3542

clients = {}

2752

3543

with PGPEngine() as pgp:

2753

for client in tcp_server.clients.itervalues():

3544

for client in tcp_server.clients.values():

2754

3545

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

2755

3546

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

2756

3547

key)

2757

3548

client_dict = {}

2758

3549

2759

3550

# A list of attributes that can not be pickled

2760

3551

# + secret.

2761

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

2762

"checker", "server_settings"))

2763

for name, typ in (inspect.getmembers

2764

(dbus.service.Object)):

3552

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

3553

"checker", "server_settings"}

3554

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

3555

.Object):

2765

3556

exclude.add(name)

2766

3557

2767

3558

client_dict["encrypted_secret"] = (client

2768

3559

.encrypted_secret)

2769

3560

for attr in client.client_structure:

2770

3561

if attr not in exclude:

2771

3562

client_dict[attr] = getattr(client, attr)

2772

3563

2773

3564

clients[client.name] = client_dict

2774

3565

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

2775

3566

2776

3567

try:

2777

with (tempfile.NamedTemporaryFile

2778

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

2779

dir=os.path.dirname(stored_state_path),

2780

delete=False)) as stored_state:

2781

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

2782

tempname=stored_state.name

3568

with tempfile.NamedTemporaryFile(

3569

mode="wb",

3570

suffix=".pickle",

3571

prefix="clients-",

3572

dir=os.path.dirname(stored_state_path),

3573

delete=False) as stored_state:

3574

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

3575

protocol=2)

3576

tempname = stored_state.name

2783

3577

os.rename(tempname, stored_state_path)

2784

3578

except (IOError, OSError) as e:

2785

3579

if not debug:

2788

3582

except NameError:

2789

3583

pass

2790

3584

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

2791

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

2792

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

3585

log.warning("Could not save persistent state: %s",

3586

os.strerror(e.errno))

2793

3587

else:

2794

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

2795

exc_info=e)

3588

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

3589

exc_info=e)

2796

3590

raise

2797

3591

2798

3592

# Delete all clients, and settings from config

2799

3593

while tcp_server.clients:

2800

3594

name, client = tcp_server.clients.popitem()

2801

3595

if use_dbus:

2802

3596

client.remove_from_connection()

2803

# Don't signal anything except ClientRemoved

3597

# Don't signal the disabling

2804

3598

client.disable(quiet=True)

3599

# Emit D-Bus signal for removal

2805

3600

if use_dbus:

2806

# Emit D-Bus signal

2807

mandos_dbus_service.ClientRemoved(client

2808

.dbus_object_path,

2809

client.name)

3601

mandos_dbus_service.client_removed_signal(client)

2810

3602

client_settings.clear()

2811

3603

2812

3604

atexit.register(cleanup)

2813

2814

for client in tcp_server.clients.itervalues():

3605

3606

for client in tcp_server.clients.values():

2815

3607

if use_dbus:

2816

# Emit D-Bus signal

2817

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3608

# Emit D-Bus signal for adding

3609

mandos_dbus_service.client_added_signal(client)

2818

3610

# Need to initiate checking of clients

2819

3611

if client.enabled:

2820

3612

client.init_checker()

2821

3613

2822

3614

tcp_server.enable()

2823

3615

tcp_server.server_activate()

2824

3616

2825

3617

# Find out what port we got

2826

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

3618

if zeroconf:

3619

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

2827

3620

if use_ipv6:

2828

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

2829

" flowinfo %d, scope_id %d",

2830

*tcp_server.socket.getsockname())

3621

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

3622

" scope_id %d", *tcp_server.socket.getsockname())

2831

3623

else: # IPv4

2832

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

2833

*tcp_server.socket.getsockname())

2834

2835

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

2836

3624

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

3625

*tcp_server.socket.getsockname())

3626

3627

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

3628

2837

3629

try:

2838

# From the Avahi example code

2839

try:

2840

service.activate()

2841

except dbus.exceptions.DBusException as error:

2842

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

2843

cleanup()

2844

sys.exit(1)

2845

# End of Avahi example code

2846

2847

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

2848

lambda *args, **kwargs:

2849

(tcp_server.handle_request

2850

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

2851

2852

logger.debug("Starting main loop")

3630

if zeroconf:

3631

# From the Avahi example code

3632

try:

3633

service.activate()

3634

except dbus.exceptions.DBusException as error:

3635

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

3636

cleanup()

3637

sys.exit(1)

3638

# End of Avahi example code

3639

3640

GLib.io_add_watch(

3641

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

3642

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

3643

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

3644

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

3645

3646

log.debug("Starting main loop")

2853

3647

main_loop.run()

2854

3648

except AvahiError as error:

2855

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

3649

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

2856

3650

cleanup()

2857

3651

sys.exit(1)

2858

3652

except KeyboardInterrupt:

2859

3653

if debug:

2860

3654

print("", file=sys.stderr)

2861

logger.debug("Server received KeyboardInterrupt")

2862

logger.debug("Server exiting")

3655

log.debug("Server received KeyboardInterrupt")

3656

log.debug("Server exiting")

2863

3657

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

2864

3658

cleanup()

2865

3659

2866

if __name__ == '__main__':

2867

main()

3660

3661

def should_only_run_tests():

3662

parser = argparse.ArgumentParser(add_help=False)

3663

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

3664

args, unknown_args = parser.parse_known_args()

3665

run_tests = args.check

3666

if run_tests:

3667

# Remove --check argument from sys.argv

3668

sys.argv[1:] = unknown_args

3669

return run_tests

3670

3671

# Add all tests from doctest strings

3672

def load_tests(loader, tests, none):

3673

import doctest

3674

tests.addTests(doctest.DocTestSuite())

3675

return tests

3676

3677

if __name__ == "__main__":

3678

try:

3679

if should_only_run_tests():

3680

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

3681

unittest.main()

3682

else:

3683

main()

3684

finally:

3685

logging.shutdown()