/mandos/release : revision 237.7.333

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#!/usr/bin/python3 -bI

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

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#

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#!/usr/bin/python2.7

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

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#

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

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#

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#

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

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# service publisher, downloaded from

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

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

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

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

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#

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#

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# Everything else is

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#

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# This file is part of Mandos.

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#

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

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

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#

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

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

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

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# (at your option) any later version.

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#

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

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# WITHOUT ANY WARRANTY; without even the implied warranty of

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

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

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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# GNU General Public License for more details.

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#

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#

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

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

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#

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# along with this program. If not, see

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

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#

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

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#

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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try:

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from future_builtins import *

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except ImportError:

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pass

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from future_builtins import *

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38

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try:

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40

import SocketServer as socketserver

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44

import argparse

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import datetime

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46

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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try:

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import ConfigParser as configparser

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except ImportError:

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import itertools

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import collections

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import codecs

80

import unittest

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import random

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import shlex

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import dbus

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import dbus.service

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import gi

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from gi.repository import GLib

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try:

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import gobject

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except ImportError:

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from gi.repository import GObject as gobject

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import avahi

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90

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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95

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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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# Show warnings by default

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if not sys.warnoptions:

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import warnings

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warnings.simplefilter("default")

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# Try to find the value of SO_BINDTODEVICE:

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try:

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

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

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except AttributeError:

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99

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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101

except ImportError:

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

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# Try running the C preprocessor:

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try:

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

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"/dev/stdin"],

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE)

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stdout = cc.communicate(

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

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

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except (OSError, ValueError, IndexError):

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# No value found

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SO_BINDTODEVICE = None

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if sys.version_info < (3, 2):

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configparser.Configparser = configparser.SafeConfigParser

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version = "1.8.11"

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.6.9"

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stored_state_file = "clients.pickle"

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109

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logger = logging.getLogger()

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

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syslogger = None

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try:

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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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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return interface_index

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def copy_function(func):

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

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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183

184

128

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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facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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pass

209

153

210

154

211

class PGPEngine:

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class PGPEngine(object):

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

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157

214

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def __init__(self):

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159

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

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == b"gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

227

160

self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--home', self.tempdir,

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162

'--force-mdc',

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'--quiet']

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

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

233

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

234

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'--quiet',

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'--no-use-agent']

165

235

166

def __enter__(self):

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167

return self

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168

238

169

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

239

170

self._cleanup()

240

171

return False

241

172

242

173

def __del__(self):

243

174

self._cleanup()

244

175

245

176

def _cleanup(self):

246

177

if self.tempdir is not None:

247

178

# Delete contents of tempdir

248

179

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

249

topdown=False):

180

topdown = False):

250

181

for filename in files:

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182

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

252

183

for dirname in dirs:

254

185

# Remove tempdir

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os.rmdir(self.tempdir)

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187

self.tempdir = None

257

188

258

189

def password_encode(self, password):

259

190

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

260

191

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

265

196

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

266

197

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

267

198

return encoded

268

199

269

200

def encrypt(self, data, password):

270

201

passphrase = self.password_encode(password)

271

202

with tempfile.NamedTemporaryFile(

272

203

dir=self.tempdir) as passfile:

273

204

passfile.write(passphrase)

274

205

passfile.flush()

275

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

206

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

276

207

'--passphrase-file',

277

208

passfile.name]

278

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+ self.gnupgargs,

279

stdin=subprocess.PIPE,

280

stdout=subprocess.PIPE,

281

stderr=subprocess.PIPE)

282

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

210

stdin = subprocess.PIPE,

211

stdout = subprocess.PIPE,

212

stderr = subprocess.PIPE)

213

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

283

214

if proc.returncode != 0:

284

215

raise PGPError(err)

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216

return ciphertext

286

217

287

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def decrypt(self, data, password):

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219

passphrase = self.password_encode(password)

289

220

with tempfile.NamedTemporaryFile(

290

dir=self.tempdir) as passfile:

221

dir = self.tempdir) as passfile:

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222

passfile.write(passphrase)

292

223

passfile.flush()

293

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

224

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

294

225

'--passphrase-file',

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226

passfile.name]

296

227

+ self.gnupgargs,

297

stdin=subprocess.PIPE,

298

stdout=subprocess.PIPE,

299

stderr=subprocess.PIPE)

300

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

228

stdin = subprocess.PIPE,

229

stdout = subprocess.PIPE,

230

stderr = subprocess.PIPE)

231

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

301

232

if proc.returncode != 0:

302

233

raise PGPError(err)

303

234

return decrypted_plaintext

304

235

305

236

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

332

237

class AvahiError(Exception):

333

238

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

334

239

self.value = value

344

249

pass

345

250

346

251

347

class AvahiService:

252

class AvahiService(object):

348

253

"""An Avahi (Zeroconf) service.

349

254

350

255

Attributes:

351

256

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

352

257

Used to optionally bind to the specified interface.

364

269

server: D-Bus Server

365

270

bus: dbus.SystemBus()

366

271

"""

367

272

368

273

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):

274

interface = avahi.IF_UNSPEC,

275

name = None,

276

servicetype = None,

277

port = None,

278

TXT = None,

279

domain = "",

280

host = "",

281

max_renames = 32768,

282

protocol = avahi.PROTO_UNSPEC,

283

bus = None):

379

284

self.interface = interface

380

285

self.name = name

381

286

self.type = servicetype

390

295

self.server = None

391

296

self.bus = bus

392

297

self.entry_group_state_changed_match = None

393

298

394

299

def rename(self, remove=True):

395

300

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

396

301

if self.rename_count >= self.max_renames:

416

321

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

417

322

self.cleanup()

418

323

os._exit(1)

419

324

420

325

def remove(self):

421

326

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

422

327

if self.entry_group_state_changed_match is not None:

424

329

self.entry_group_state_changed_match = None

425

330

if self.group is not None:

426

331

self.group.Reset()

427

332

428

333

def add(self):

429

334

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

430

335

self.remove()

447

352

dbus.UInt16(self.port),

448

353

avahi.string_array_to_txt_array(self.TXT))

449

354

self.group.Commit()

450

355

451

356

def entry_group_state_changed(self, state, error):

452

357

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

453

358

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

454

359

455

360

if state == avahi.ENTRY_GROUP_ESTABLISHED:

456

361

logger.debug("Zeroconf service established.")

457

362

elif state == avahi.ENTRY_GROUP_COLLISION:

461

366

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

462

367

str(error))

463

368

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

464

369

465

370

def cleanup(self):

466

371

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

467

372

if self.group is not None:

472

377

pass

473

378

self.group = None

474

379

self.remove()

475

380

476

381

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

477

382

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

478

383

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

507

412

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

508

413

else:

509

414

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

510

415

511

416

def activate(self):

512

417

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

513

418

if self.server is None:

524

429

class AvahiServiceToSyslog(AvahiService):

525

430

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

526

431

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

527

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

432

ret = AvahiService.rename(self, *args, **kwargs)

528

433

syslogger.setFormatter(logging.Formatter(

529

434

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

530

435

.format(self.name)))

531

436

return ret

532

437

533

534

# Pretend that we have a GnuTLS module

535

class gnutls:

536

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

537

538

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

539

if library is None:

540

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

541

_library = ctypes.cdll.LoadLibrary(library)

542

del library

543

544

# Unless otherwise indicated, the constants and types below are

545

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

546

547

# Constants

548

E_SUCCESS = 0

549

E_INTERRUPTED = -52

550

E_AGAIN = -28

551

CRT_OPENPGP = 2

552

CRT_RAWPK = 3

553

CLIENT = 2

554

SHUT_RDWR = 0

555

CRD_CERTIFICATE = 1

556

E_NO_CERTIFICATE_FOUND = -49

557

X509_FMT_DER = 0

558

NO_TICKETS = 1<<10

559

ENABLE_RAWPK = 1<<18

560

CTYPE_PEERS = 3

561

KEYID_USE_SHA256 = 1 # gnutls/x509.h

562

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

563

564

# Types

565

class session_int(ctypes.Structure):

566

_fields_ = []

567

session_t = ctypes.POINTER(session_int)

568

569

class certificate_credentials_st(ctypes.Structure):

570

_fields_ = []

571

certificate_credentials_t = ctypes.POINTER(

572

certificate_credentials_st)

573

certificate_type_t = ctypes.c_int

574

575

class datum_t(ctypes.Structure):

576

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

577

('size', ctypes.c_uint)]

578

579

class openpgp_crt_int(ctypes.Structure):

580

_fields_ = []

581

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

582

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

583

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

584

credentials_type_t = ctypes.c_int

585

transport_ptr_t = ctypes.c_void_p

586

close_request_t = ctypes.c_int

587

588

# Exceptions

589

class Error(Exception):

590

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

591

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

592

# code is passed, convert it to a string with

593

# gnutls.strerror()

594

self.code = code

595

if message is None and code is not None:

596

message = gnutls.strerror(code)

597

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

598

message, *args)

599

600

class CertificateSecurityError(Error):

601

pass

602

603

# Classes

604

class Credentials:

605

def __init__(self):

606

self._c_object = gnutls.certificate_credentials_t()

607

gnutls.certificate_allocate_credentials(

608

ctypes.byref(self._c_object))

609

self.type = gnutls.CRD_CERTIFICATE

610

611

def __del__(self):

612

gnutls.certificate_free_credentials(self._c_object)

613

614

class ClientSession:

615

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

616

self._c_object = gnutls.session_t()

617

gnutls_flags = gnutls.CLIENT

618

if gnutls.check_version(b"3.5.6"):

619

gnutls_flags |= gnutls.NO_TICKETS

620

if gnutls.has_rawpk:

621

gnutls_flags |= gnutls.ENABLE_RAWPK

622

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

623

del gnutls_flags

624

gnutls.set_default_priority(self._c_object)

625

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

626

gnutls.handshake_set_private_extensions(self._c_object,

627

True)

628

self.socket = socket

629

if credentials is None:

630

credentials = gnutls.Credentials()

631

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

632

ctypes.cast(credentials._c_object,

633

ctypes.c_void_p))

634

self.credentials = credentials

635

636

def __del__(self):

637

gnutls.deinit(self._c_object)

638

639

def handshake(self):

640

return gnutls.handshake(self._c_object)

641

642

def send(self, data):

643

data = bytes(data)

644

data_len = len(data)

645

while data_len > 0:

646

data_len -= gnutls.record_send(self._c_object,

647

data[-data_len:],

648

data_len)

649

650

def bye(self):

651

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

652

653

# Error handling functions

654

def _error_code(result):

655

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

656

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

657

if result >= 0:

658

return result

659

if result == gnutls.E_NO_CERTIFICATE_FOUND:

660

raise gnutls.CertificateSecurityError(code=result)

661

raise gnutls.Error(code=result)

662

663

def _retry_on_error(result, func, arguments):

664

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

665

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

666

while result < 0:

667

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

668

return _error_code(result)

669

result = func(*arguments)

670

return result

671

672

# Unless otherwise indicated, the function declarations below are

673

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

674

675

# Functions

676

priority_set_direct = _library.gnutls_priority_set_direct

677

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

678

ctypes.POINTER(ctypes.c_char_p)]

679

priority_set_direct.restype = _error_code

680

681

init = _library.gnutls_init

682

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

683

init.restype = _error_code

684

685

set_default_priority = _library.gnutls_set_default_priority

686

set_default_priority.argtypes = [session_t]

687

set_default_priority.restype = _error_code

688

689

record_send = _library.gnutls_record_send

690

record_send.argtypes = [session_t, ctypes.c_void_p,

691

ctypes.c_size_t]

692

record_send.restype = ctypes.c_ssize_t

693

record_send.errcheck = _retry_on_error

694

695

certificate_allocate_credentials = (

696

_library.gnutls_certificate_allocate_credentials)

697

certificate_allocate_credentials.argtypes = [

698

ctypes.POINTER(certificate_credentials_t)]

699

certificate_allocate_credentials.restype = _error_code

700

701

certificate_free_credentials = (

702

_library.gnutls_certificate_free_credentials)

703

certificate_free_credentials.argtypes = [

704

certificate_credentials_t]

705

certificate_free_credentials.restype = None

706

707

handshake_set_private_extensions = (

708

_library.gnutls_handshake_set_private_extensions)

709

handshake_set_private_extensions.argtypes = [session_t,

710

ctypes.c_int]

711

handshake_set_private_extensions.restype = None

712

713

credentials_set = _library.gnutls_credentials_set

714

credentials_set.argtypes = [session_t, credentials_type_t,

715

ctypes.c_void_p]

716

credentials_set.restype = _error_code

717

718

strerror = _library.gnutls_strerror

719

strerror.argtypes = [ctypes.c_int]

720

strerror.restype = ctypes.c_char_p

721

722

certificate_type_get = _library.gnutls_certificate_type_get

723

certificate_type_get.argtypes = [session_t]

724

certificate_type_get.restype = _error_code

725

726

certificate_get_peers = _library.gnutls_certificate_get_peers

727

certificate_get_peers.argtypes = [session_t,

728

ctypes.POINTER(ctypes.c_uint)]

729

certificate_get_peers.restype = ctypes.POINTER(datum_t)

730

731

global_set_log_level = _library.gnutls_global_set_log_level

732

global_set_log_level.argtypes = [ctypes.c_int]

733

global_set_log_level.restype = None

734

735

global_set_log_function = _library.gnutls_global_set_log_function

736

global_set_log_function.argtypes = [log_func]

737

global_set_log_function.restype = None

738

739

deinit = _library.gnutls_deinit

740

deinit.argtypes = [session_t]

741

deinit.restype = None

742

743

handshake = _library.gnutls_handshake

744

handshake.argtypes = [session_t]

745

handshake.restype = _error_code

746

handshake.errcheck = _retry_on_error

747

748

transport_set_ptr = _library.gnutls_transport_set_ptr

749

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

750

transport_set_ptr.restype = None

751

752

bye = _library.gnutls_bye

753

bye.argtypes = [session_t, close_request_t]

754

bye.restype = _error_code

755

bye.errcheck = _retry_on_error

756

757

check_version = _library.gnutls_check_version

758

check_version.argtypes = [ctypes.c_char_p]

759

check_version.restype = ctypes.c_char_p

760

761

_need_version = b"3.3.0"

762

if check_version(_need_version) is None:

763

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

764

.format(_need_version))

765

766

_tls_rawpk_version = b"3.6.6"

767

has_rawpk = bool(check_version(_tls_rawpk_version))

768

769

if has_rawpk:

770

# Types

771

class pubkey_st(ctypes.Structure):

772

_fields = []

773

pubkey_t = ctypes.POINTER(pubkey_st)

774

775

x509_crt_fmt_t = ctypes.c_int

776

777

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

778

pubkey_init = _library.gnutls_pubkey_init

779

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

780

pubkey_init.restype = _error_code

781

782

pubkey_import = _library.gnutls_pubkey_import

783

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

784

x509_crt_fmt_t]

785

pubkey_import.restype = _error_code

786

787

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

788

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

789

ctypes.POINTER(ctypes.c_ubyte),

790

ctypes.POINTER(ctypes.c_size_t)]

791

pubkey_get_key_id.restype = _error_code

792

793

pubkey_deinit = _library.gnutls_pubkey_deinit

794

pubkey_deinit.argtypes = [pubkey_t]

795

pubkey_deinit.restype = None

796

else:

797

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

798

799

openpgp_crt_init = _library.gnutls_openpgp_crt_init

800

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

801

openpgp_crt_init.restype = _error_code

802

803

openpgp_crt_import = _library.gnutls_openpgp_crt_import

804

openpgp_crt_import.argtypes = [openpgp_crt_t,

805

ctypes.POINTER(datum_t),

806

openpgp_crt_fmt_t]

807

openpgp_crt_import.restype = _error_code

808

809

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

810

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

811

ctypes.POINTER(ctypes.c_uint)]

812

openpgp_crt_verify_self.restype = _error_code

813

814

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

815

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

816

openpgp_crt_deinit.restype = None

817

818

openpgp_crt_get_fingerprint = (

819

_library.gnutls_openpgp_crt_get_fingerprint)

820

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

821

ctypes.c_void_p,

822

ctypes.POINTER(

823

ctypes.c_size_t)]

824

openpgp_crt_get_fingerprint.restype = _error_code

825

826

if check_version(b"3.6.4"):

827

certificate_type_get2 = _library.gnutls_certificate_type_get2

828

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

829

certificate_type_get2.restype = _error_code

830

831

# Remove non-public functions

832

del _error_code, _retry_on_error

833

834

835

438

def call_pipe(connection, # : multiprocessing.Connection

836

439

func, *args, **kwargs):

837

440

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

838

441

839

442

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

840

443

return value on the provided multiprocessing.Connection.

841

444

"""

842

445

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

843

446

connection.close()

844

447

845

846

class Client:

448

class Client(object):

847

449

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

848

450

849

451

Attributes:

850

452

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

851

453

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

852

454

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

853

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

854

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

855

running.

856

checker_callback_tag: a GLib event source tag, or None

455

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

456

to see if the client lives.

457

'None' if no process is running.

458

checker_callback_tag: a gobject event source tag, or None

857

459

checker_command: string; External command which is run to check

858

460

if client lives. %() expansions are done at

859

461

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

860

462

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

861

checker_initiator_tag: a GLib event source tag, or None

463

checker_initiator_tag: a gobject event source tag, or None

862

464

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

863

465

client_structure: Object describing what attributes a client has

864

466

and is used for storing the client at exit

865

467

current_checker_command: string; current running checker_command

866

disable_initiator_tag: a GLib event source tag, or None

468

disable_initiator_tag: a gobject event source tag, or None

867

469

enabled: bool()

868

470

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

869

uniquely identify an OpenPGP client

870

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

871

a client using raw public keys

471

uniquely identify the client

872

472

host: string; available for use by the checker command

873

473

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

874

474

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

890

490

disabled, or None

891

491

server_settings: The server_settings dict from main()

892

492

"""

893

493

894

494

runtime_expansions = ("approval_delay", "approval_duration",

895

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

495

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

896

496

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

897

497

"last_approval_request", "last_checked_ok",

898

498

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

907

507

"approved_by_default": "True",

908

508

"enabled": "True",

909

509

}

910

510

911

511

@staticmethod

912

512

def config_parser(config):

913

513

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

920

520

for client_name in config.sections():

921

521

section = dict(config.items(client_name))

922

522

client = settings[client_name] = {}

923

523

924

524

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

925

525

# Reformat values from string types to Python types

926

526

client["approved_by_default"] = config.getboolean(

927

527

client_name, "approved_by_default")

928

528

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

929

529

"enabled")

930

931

# Uppercase and remove spaces from key_id and fingerprint

932

# for later comparison purposes with return value from the

933

# key_id() and fingerprint() functions

934

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

935

.replace(" ", ""))

530

531

# Uppercase and remove spaces from fingerprint for later

532

# comparison purposes with return value from the

533

# fingerprint() function

936

534

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

937

535

.replace(" ", ""))

938

536

if "secret" in section:

939

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

940

.encode("utf-8"),

941

"base64")

537

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

942

538

elif "secfile" in section:

943

539

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

944

540

(section["secfile"])),

959

555

client["last_approval_request"] = None

960

556

client["last_checked_ok"] = None

961

557

client["last_checker_status"] = -2

962

558

963

559

return settings

964

965

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

560

561

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

966

562

self.name = name

967

563

if server_settings is None:

968

564

server_settings = {}

970

566

# adding all client settings

971

567

for setting, value in settings.items():

972

568

setattr(self, setting, value)

973

569

974

570

if self.enabled:

975

571

if not hasattr(self, "last_enabled"):

976

572

self.last_enabled = datetime.datetime.utcnow()

980

576

else:

981

577

self.last_enabled = None

982

578

self.expires = None

983

579

984

580

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

985

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

986

581

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

987

582

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

988

583

datetime.datetime.utcnow())

989

584

990

585

# attributes specific for this server instance

991

586

self.checker = None

992

587

self.checker_initiator_tag = None

998

593

self.changedstate = multiprocessing_manager.Condition(

999

594

multiprocessing_manager.Lock())

1000

595

self.client_structure = [attr

1001

for attr in self.__dict__.keys()

596

for attr in self.__dict__.iterkeys()

1002

597

if not attr.startswith("_")]

1003

598

self.client_structure.append("client_structure")

1004

599

1005

600

for name, t in inspect.getmembers(

1006

601

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

1007

602

if not name.startswith("_"):

1008

603

self.client_structure.append(name)

1009

604

1010

605

# Send notice to process children that client state has changed

1011

606

def send_changedstate(self):

1012

607

with self.changedstate:

1013

608

self.changedstate.notify_all()

1014

609

1015

610

def enable(self):

1016

611

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

1017

612

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

1022

617

self.last_enabled = datetime.datetime.utcnow()

1023

618

self.init_checker()

1024

619

self.send_changedstate()

1025

620

1026

621

def disable(self, quiet=True):

1027

622

"""Disable this client."""

1028

623

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

1030

625

if not quiet:

1031

626

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

1032

627

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

1033

GLib.source_remove(self.disable_initiator_tag)

628

gobject.source_remove(self.disable_initiator_tag)

1034

629

self.disable_initiator_tag = None

1035

630

self.expires = None

1036

631

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

1037

GLib.source_remove(self.checker_initiator_tag)

632

gobject.source_remove(self.checker_initiator_tag)

1038

633

self.checker_initiator_tag = None

1039

634

self.stop_checker()

1040

635

self.enabled = False

1041

636

if not quiet:

1042

637

self.send_changedstate()

1043

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

638

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

1044

639

return False

1045

640

1046

641

def __del__(self):

1047

642

self.disable()

1048

643

1049

644

def init_checker(self):

1050

645

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

1051

646

# and every interval from then on.

1052

647

if self.checker_initiator_tag is not None:

1053

GLib.source_remove(self.checker_initiator_tag)

1054

self.checker_initiator_tag = GLib.timeout_add(

1055

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

1056

+ 1)),

648

gobject.source_remove(self.checker_initiator_tag)

649

self.checker_initiator_tag = gobject.timeout_add(

650

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

1057

651

self.start_checker)

1058

652

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

1059

653

if self.disable_initiator_tag is not None:

1060

GLib.source_remove(self.disable_initiator_tag)

1061

self.disable_initiator_tag = GLib.timeout_add(

654

gobject.source_remove(self.disable_initiator_tag)

655

self.disable_initiator_tag = gobject.timeout_add(

1062

656

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

1063

657

# Also start a new checker *right now*.

1064

658

self.start_checker()

1065

659

1066

660

def checker_callback(self, source, condition, connection,

1067

661

command):

1068

662

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

663

self.checker_callback_tag = None

664

self.checker = None

1069

665

# Read return code from connection (see call_pipe)

1070

666

returncode = connection.recv()

1071

667

connection.close()

1072

if self.checker is not None:

1073

self.checker.join()

1074

self.checker_callback_tag = None

1075

self.checker = None

1076

668

1077

669

if returncode >= 0:

1078

670

self.last_checker_status = returncode

1079

671

self.last_checker_signal = None

1089

681

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

1090

682

vars(self))

1091

683

return False

1092

684

1093

685

def checked_ok(self):

1094

686

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

1095

687

self.last_checked_ok = datetime.datetime.utcnow()

1096

688

self.last_checker_status = 0

1097

689

self.last_checker_signal = None

1098

690

self.bump_timeout()

1099

691

1100

692

def bump_timeout(self, timeout=None):

1101

693

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

1102

694

if timeout is None:

1103

695

timeout = self.timeout

1104

696

if self.disable_initiator_tag is not None:

1105

GLib.source_remove(self.disable_initiator_tag)

697

gobject.source_remove(self.disable_initiator_tag)

1106

698

self.disable_initiator_tag = None

1107

699

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

1108

self.disable_initiator_tag = GLib.timeout_add(

700

self.disable_initiator_tag = gobject.timeout_add(

1109

701

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

1110

702

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

1111

703

1112

704

def need_approval(self):

1113

705

self.last_approval_request = datetime.datetime.utcnow()

1114

706

1115

707

def start_checker(self):

1116

708

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

1117

709

1118

710

If a checker already exists, leave it running and do

1119

711

nothing."""

1120

712

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

1125

717

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

1126

718

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

1127

719

# should be.

1128

720

1129

721

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

1130

722

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

1131

723

self.checker.join()

1134

726

if self.checker is None:

1135

727

# Escape attributes for the shell

1136

728

escaped_attrs = {

1137

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

1138

for attr in self.runtime_expansions}

729

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

730

for attr in self.runtime_expansions }

1139

731

try:

1140

732

command = self.checker_command % escaped_attrs

1141

733

except TypeError as error:

1153

745

# The exception is when not debugging but nevertheless

1154

746

# running in the foreground; use the previously

1155

747

# created wnull.

1156

popen_args = {"close_fds": True,

1157

"shell": True,

1158

"cwd": "/"}

748

popen_args = { "close_fds": True,

749

"shell": True,

750

"cwd": "/" }

1159

751

if (not self.server_settings["debug"]

1160

752

and self.server_settings["foreground"]):

1161

753

popen_args.update({"stdout": wnull,

1162

"stderr": wnull})

1163

pipe = multiprocessing.Pipe(duplex=False)

754

"stderr": wnull })

755

pipe = multiprocessing.Pipe(duplex = False)

1164

756

self.checker = multiprocessing.Process(

1165

target=call_pipe,

1166

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

1167

kwargs=popen_args)

757

target = call_pipe,

758

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

759

kwargs = popen_args)

1168

760

self.checker.start()

1169

self.checker_callback_tag = GLib.io_add_watch(

1170

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

1171

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

761

self.checker_callback_tag = gobject.io_add_watch(

762

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

1172

763

self.checker_callback, pipe[0], command)

1173

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

764

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

1174

765

return True

1175

766

1176

767

def stop_checker(self):

1177

768

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

1178

769

if self.checker_callback_tag:

1179

GLib.source_remove(self.checker_callback_tag)

770

gobject.source_remove(self.checker_callback_tag)

1180

771

self.checker_callback_tag = None

1181

772

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

1182

773

return

1191

782

byte_arrays=False):

1192

783

"""Decorators for marking methods of a DBusObjectWithProperties to

1193

784

become properties on the D-Bus.

1194

785

1195

786

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

1196

787

and with one argument by "Set".

1197

788

1198

789

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

1199

790

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

1200

791

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

1204

795

if byte_arrays and signature != "ay":

1205

796

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

1206

797

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

1207

798

1208

799

def decorator(func):

1209

800

func._dbus_is_property = True

1210

801

func._dbus_interface = dbus_interface

1213

804

func._dbus_name = func.__name__

1214

805

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

1215

806

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

1216

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

807

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1217

808

return func

1218

809

1219

810

return decorator

1220

811

1221

812

1222

813

def dbus_interface_annotations(dbus_interface):

1223

814

"""Decorator for marking functions returning interface annotations

1224

815

1225

816

Usage:

1226

817

1227

818

@dbus_interface_annotations("org.example.Interface")

1228

819

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

1229

820

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

1230

821

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

1231

822

"false"}

1232

823

"""

1233

824

1234

825

def decorator(func):

1235

826

func._dbus_is_interface = True

1236

827

func._dbus_interface = dbus_interface

1237

828

func._dbus_name = dbus_interface

1238

829

return func

1239

830

1240

831

return decorator

1241

832

1242

833

1243

834

def dbus_annotations(annotations):

1244

835

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

1245

836

Usage:

1246

837

1247

838

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

1248

839

"org.freedesktop.DBus.Property."

1249

840

"EmitsChangedSignal": "false"})

1251

842

access="r")

1252

843

def Property_dbus_property(self):

1253

844

return dbus.Boolean(False)

1254

845

1255

846

See also the DBusObjectWithAnnotations class.

1256

847

"""

1257

848

1258

849

def decorator(func):

1259

850

func._dbus_annotations = annotations

1260

851

return func

1261

852

1262

853

return decorator

1263

854

1264

855

1282

873

1283

874

class DBusObjectWithAnnotations(dbus.service.Object):

1284

875

"""A D-Bus object with annotations.

1285

876

1286

877

Classes inheriting from this can use the dbus_annotations

1287

878

decorator to add annotations to methods or signals.

1288

879

"""

1289

880

1290

881

@staticmethod

1291

882

def _is_dbus_thing(thing):

1292

883

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

1293

884

1294

885

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

1295

886

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

1296

887

"""

1297

888

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

1298

889

False)

1299

890

1300

891

def _get_all_dbus_things(self, thing):

1301

892

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

1302

893

"""

1305

896

for cls in self.__class__.__mro__

1306

897

for name, athing in

1307

898

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

1308

899

1309

900

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1310

out_signature="s",

1311

path_keyword='object_path',

1312

connection_keyword='connection')

901

out_signature = "s",

902

path_keyword = 'object_path',

903

connection_keyword = 'connection')

1313

904

def Introspect(self, object_path, connection):

1314

905

"""Overloading of standard D-Bus method.

1315

906

1316

907

Inserts annotation tags on methods and signals.

1317

908

"""

1318

909

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

1319

910

connection)

1320

911

try:

1321

912

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

1322

913

1323

914

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

1324

915

# Add annotation tags

1325

916

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

1352

943

if_tag.appendChild(ann_tag)

1353

944

# Fix argument name for the Introspect method itself

1354

945

if (if_tag.getAttribute("name")

1355

== dbus.INTROSPECTABLE_IFACE):

946

== dbus.INTROSPECTABLE_IFACE):

1356

947

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

1357

948

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

1358

949

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

1371

962

1372

963

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1373

964

"""A D-Bus object with properties.

1374

965

1375

966

Classes inheriting from this can use the dbus_service_property

1376

967

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

1377

968

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

1378

969

"""

1379

970

1380

971

def _get_dbus_property(self, interface_name, property_name):

1381

972

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

1382

973

property with the specified name and interface.

1387

978

if (value._dbus_name == property_name

1388

979

and value._dbus_interface == interface_name):

1389

980

return value.__get__(self)

1390

981

1391

982

# No such property

1392

983

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

1393

984

self.dbus_object_path, interface_name, property_name))

1394

985

1395

986

@classmethod

1396

987

def _get_all_interface_names(cls):

1397

988

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

1400

991

for x in (inspect.getmro(cls))

1401

992

for attr in dir(x))

1402

993

if name is not None)

1403

994

1404

995

@dbus.service.method(dbus.PROPERTIES_IFACE,

1405

996

in_signature="ss",

1406

997

out_signature="v")

1414

1005

if not hasattr(value, "variant_level"):

1415

1006

return value

1416

1007

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

1417

1008

1418

1009

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

1419

1010

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

1420

1011

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

1429

1020

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

1430

1021

"'ay' signature {!r}"

1431

1022

.format(prop._dbus_signature))

1432

value = dbus.ByteArray(bytes(value))

1023

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

1024

for byte in value))

1433

1025

prop(value)

1434

1026

1435

1027

@dbus.service.method(dbus.PROPERTIES_IFACE,

1436

1028

in_signature="s",

1437

1029

out_signature="a{sv}")

1438

1030

def GetAll(self, interface_name):

1439

1031

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

1440

1032

standard.

1441

1033

1442

1034

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

1443

1035

"""

1444

1036

properties = {}

1455

1047

properties[name] = value

1456

1048

continue

1457

1049

properties[name] = type(value)(

1458

value, variant_level=value.variant_level + 1)

1050

value, variant_level = value.variant_level + 1)

1459

1051

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

1460

1052

1461

1053

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

1462

1054

def PropertiesChanged(self, interface_name, changed_properties,

1463

1055

invalidated_properties):

1465

1057

standard.

1466

1058

"""

1467

1059

pass

1468

1060

1469

1061

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1470

1062

out_signature="s",

1471

1063

path_keyword='object_path',

1472

1064

connection_keyword='connection')

1473

1065

def Introspect(self, object_path, connection):

1474

1066

"""Overloading of standard D-Bus method.

1475

1067

1476

1068

Inserts property tags and interface annotation tags.

1477

1069

"""

1478

1070

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1480

1072

connection)

1481

1073

try:

1482

1074

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

1483

1075

1484

1076

def make_tag(document, name, prop):

1485

1077

e = document.createElement("property")

1486

1078

e.setAttribute("name", name)

1487

1079

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

1488

1080

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

1489

1081

return e

1490

1082

1491

1083

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

1492

1084

# Add property tags

1493

1085

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

1535

1127

exc_info=error)

1536

1128

return xmlstring

1537

1129

1538

1539

1130

try:

1540

1131

dbus.OBJECT_MANAGER_IFACE

1541

1132

except AttributeError:

1542

1133

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

1543

1134

1544

1545

1135

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1546

1136

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

1547

1137

1548

1138

Classes inheriting from this exposes the standard

1549

1139

GetManagedObjects call and the InterfacesAdded and

1550

1140

InterfacesRemoved signals on the standard

1551

1141

"org.freedesktop.DBus.ObjectManager" interface.

1552

1142

1553

1143

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

1554

1144

manually.

1555

1145

"""

1556

1146

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1557

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

1147

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

1558

1148

def GetManagedObjects(self):

1559

1149

"""This function must be overridden"""

1560

1150

raise NotImplementedError()

1561

1151

1562

1152

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1563

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

1153

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

1564

1154

def InterfacesAdded(self, object_path, interfaces_and_properties):

1565

1155

pass

1566

1567

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

1156

1157

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1158

signature = "oas")

1568

1159

def InterfacesRemoved(self, object_path, interfaces):

1569

1160

pass

1570

1161

1571

1162

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1572

out_signature="s",

1573

path_keyword='object_path',

1574

connection_keyword='connection')

1163

out_signature = "s",

1164

path_keyword = 'object_path',

1165

connection_keyword = 'connection')

1575

1166

def Introspect(self, object_path, connection):

1576

1167

"""Overloading of standard D-Bus method.

1577

1168

1578

1169

Override return argument name of GetManagedObjects to be

1579

1170

"objpath_interfaces_and_properties"

1580

1171

"""

1581

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1582

object_path,

1583

connection)

1172

xmlstring = DBusObjectWithAnnotations(self, object_path,

1173

connection)

1584

1174

try:

1585

1175

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

1586

1176

1587

1177

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

1588

1178

# Fix argument name for the GetManagedObjects method

1589

1179

if (if_tag.getAttribute("name")

1590

== dbus.OBJECT_MANAGER_IFACE):

1180

== dbus.OBJECT_MANAGER_IFACE):

1591

1181

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

1592

1182

if (cn.getAttribute("name")

1593

1183

== "GetManagedObjects"):

1603

1193

except (AttributeError, xml.dom.DOMException,

1604

1194

xml.parsers.expat.ExpatError) as error:

1605

1195

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

1606

exc_info=error)

1196

exc_info = error)

1607

1197

return xmlstring

1608

1198

1609

1610

1199

def datetime_to_dbus(dt, variant_level=0):

1611

1200

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

1612

1201

if dt is None:

1613

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

1202

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

1614

1203

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

1615

1204

1616

1205

1619

1208

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

1620

1209

interface names according to the "alt_interface_names" mapping.

1621

1210

Usage:

1622

1211

1623

1212

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

1624

1213

"net.example.AlternateInterface"})

1625

1214

class SampleDBusObject(dbus.service.Object):

1626

1215

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

1627

1216

def SampleDBusMethod():

1628

1217

pass

1629

1218

1630

1219

The above "SampleDBusMethod" on "SampleDBusObject" will be

1631

1220

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

1632

1221

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

1633

1222

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

1634

1223

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

1635

1224

1636

1225

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

1637

1226

(from DBusObjectWithProperties) and interfaces (from the

1638

1227

dbus_interface_annotations decorator).

1639

1228

"""

1640

1229

1641

1230

def wrapper(cls):

1642

1231

for orig_interface_name, alt_interface_name in (

1643

1232

alt_interface_names.items()):

1658

1247

interface_names.add(alt_interface)

1659

1248

# Is this a D-Bus signal?

1660

1249

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

1661

# Extract the original non-method undecorated

1662

# function by black magic

1663

1250

if sys.version_info.major == 2:

1251

# Extract the original non-method undecorated

1252

# function by black magic

1664

1253

nonmethod_func = (dict(

1665

1254

zip(attribute.func_code.co_freevars,

1666

1255

attribute.__closure__))

1667

1256

["func"].cell_contents)

1668

1257

else:

1669

nonmethod_func = (dict(

1670

zip(attribute.__code__.co_freevars,

1671

attribute.__closure__))

1672

["func"].cell_contents)

1258

nonmethod_func = attribute

1673

1259

# Create a new, but exactly alike, function

1674

1260

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

1675

1261

# with the alternate D-Bus interface name

1676

new_function = copy_function(nonmethod_func)

1262

if sys.version_info.major == 2:

1263

new_function = types.FunctionType(

1264

nonmethod_func.func_code,

1265

nonmethod_func.func_globals,

1266

nonmethod_func.func_name,

1267

nonmethod_func.func_defaults,

1268

nonmethod_func.func_closure)

1269

else:

1270

new_function = types.FunctionType(

1271

nonmethod_func.__code__,

1272

nonmethod_func.__globals__,

1273

nonmethod_func.__name__,

1274

nonmethod_func.__defaults__,

1275

nonmethod_func.__closure__)

1677

1276

new_function = (dbus.service.signal(

1678

1277

alt_interface,

1679

1278

attribute._dbus_signature)(new_function))

1683

1282

attribute._dbus_annotations)

1684

1283

except AttributeError:

1685

1284

pass

1686

1687

1285

# Define a creator of a function to call both the

1688

1286

# original and alternate functions, so both the

1689

1287

# original and alternate signals gets sent when

1692

1290

"""This function is a scope container to pass

1693

1291

func1 and func2 to the "call_both" function

1694

1292

outside of its arguments"""

1695

1696

@functools.wraps(func2)

1293

1697

1294

def call_both(*args, **kwargs):

1698

1295

"""This function will emit two D-Bus

1699

1296

signals by calling func1 and func2"""

1700

1297

func1(*args, **kwargs)

1701

1298

func2(*args, **kwargs)

1702

# Make wrapper function look like a D-Bus

1703

# signal

1704

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

1705

if name.startswith("_dbus_"):

1706

setattr(call_both, name, attr)

1707

1299

1708

1300

return call_both

1709

1301

# Create the "call_both" function and add it to

1710

1302

# the class

1720

1312

alt_interface,

1721

1313

attribute._dbus_in_signature,

1722

1314

attribute._dbus_out_signature)

1723

(copy_function(attribute)))

1315

(types.FunctionType(attribute.func_code,

1316

attribute.func_globals,

1317

attribute.func_name,

1318

attribute.func_defaults,

1319

attribute.func_closure)))

1724

1320

# Copy annotations, if any

1725

1321

try:

1726

1322

attr[attrname]._dbus_annotations = dict(

1738

1334

attribute._dbus_access,

1739

1335

attribute._dbus_get_args_options

1740

1336

["byte_arrays"])

1741

(copy_function(attribute)))

1337

(types.FunctionType(

1338

attribute.func_code,

1339

attribute.func_globals,

1340

attribute.func_name,

1341

attribute.func_defaults,

1342

attribute.func_closure)))

1742

1343

# Copy annotations, if any

1743

1344

try:

1744

1345

attr[attrname]._dbus_annotations = dict(

1753

1354

# to the class.

1754

1355

attr[attrname] = (

1755

1356

dbus_interface_annotations(alt_interface)

1756

(copy_function(attribute)))

1357

(types.FunctionType(attribute.func_code,

1358

attribute.func_globals,

1359

attribute.func_name,

1360

attribute.func_defaults,

1361

attribute.func_closure)))

1757

1362

if deprecate:

1758

1363

# Deprecate all alternate interfaces

1759

iname = "_AlternateDBusNames_interface_annotation{}"

1364

iname="_AlternateDBusNames_interface_annotation{}"

1760

1365

for interface_name in interface_names:

1761

1366

1762

1367

@dbus_interface_annotations(interface_name)

1763

1368

def func(self):

1764

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

1765

"true"}

1369

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

1370

"true" }

1766

1371

# Find an unused name

1767

1372

for aname in (iname.format(i)

1768

1373

for i in itertools.count()):

1772

1377

if interface_names:

1773

1378

# Replace the class with a new subclass of it with

1774

1379

# methods, signals, etc. as created above.

1775

if sys.version_info.major == 2:

1776

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

1777

(cls, ), attr)

1778

else:

1779

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

1780

(cls, ), attr)

1380

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

1381

(cls, ), attr)

1781

1382

return cls

1782

1383

1783

1384

return wrapper

1784

1385

1785

1386

1787

1388

"se.bsnet.fukt.Mandos"})

1788

1389

class ClientDBus(Client, DBusObjectWithProperties):

1789

1390

"""A Client class using D-Bus

1790

1391

1791

1392

Attributes:

1792

1393

dbus_object_path: dbus.ObjectPath

1793

1394

bus: dbus.SystemBus()

1794

1395

"""

1795

1396

1796

1397

runtime_expansions = (Client.runtime_expansions

1797

1398

+ ("dbus_object_path", ))

1798

1399

1799

1400

_interface = "se.recompile.Mandos.Client"

1800

1401

1801

1402

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

1802

1803

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

1403

1404

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

1804

1405

self.bus = bus

1805

1406

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

1806

1407

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

1812

1413

"/clients/" + client_object_name)

1813

1414

DBusObjectWithProperties.__init__(self, self.bus,

1814

1415

self.dbus_object_path)

1815

1416

1816

1417

def notifychangeproperty(transform_func, dbus_name,

1817

1418

type_func=lambda x: x,

1818

1419

variant_level=1,

1820

1421

_interface=_interface):

1821

1422

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

1822

1423

its changes to DBus.

1823

1424

1824

1425

transform_fun: Function that takes a value and a variant_level

1825

1426

and transforms it to a D-Bus type.

1826

1427

dbus_name: D-Bus name of the variable

1829

1430

variant_level: D-Bus variant level. Default: 1

1830

1431

"""

1831

1432

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

1832

1433

1833

1434

def setter(self, value):

1834

1435

if hasattr(self, "dbus_object_path"):

1835

1436

if (not hasattr(self, attrname) or

1842

1443

else:

1843

1444

dbus_value = transform_func(

1844

1445

type_func(value),

1845

variant_level=variant_level)

1446

variant_level = variant_level)

1846

1447

self.PropertyChanged(dbus.String(dbus_name),

1847

1448

dbus_value)

1848

1449

self.PropertiesChanged(

1849

1450

_interface,

1850

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

1851

dbus_value}),

1451

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

1452

dbus_value }),

1852

1453

dbus.Array())

1853

1454

setattr(self, attrname, value)

1854

1455

1855

1456

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

1856

1457

1857

1458

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1858

1459

approvals_pending = notifychangeproperty(dbus.Boolean,

1859

1460

"ApprovalPending",

1860

type_func=bool)

1461

type_func = bool)

1861

1462

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

1862

1463

last_enabled = notifychangeproperty(datetime_to_dbus,

1863

1464

"LastEnabled")

1864

1465

checker = notifychangeproperty(

1865

1466

dbus.Boolean, "CheckerRunning",

1866

type_func=lambda checker: checker is not None)

1467

type_func = lambda checker: checker is not None)

1867

1468

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1868

1469

"LastCheckedOK")

1869

1470

last_checker_status = notifychangeproperty(dbus.Int16,

1874

1475

"ApprovedByDefault")

1875

1476

approval_delay = notifychangeproperty(

1876

1477

dbus.UInt64, "ApprovalDelay",

1877

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

1478

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

1878

1479

approval_duration = notifychangeproperty(

1879

1480

dbus.UInt64, "ApprovalDuration",

1880

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

1481

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

1881

1482

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

1882

1483

timeout = notifychangeproperty(

1883

1484

dbus.UInt64, "Timeout",

1884

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

1485

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

1885

1486

extended_timeout = notifychangeproperty(

1886

1487

dbus.UInt64, "ExtendedTimeout",

1887

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

1488

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

1888

1489

interval = notifychangeproperty(

1889

1490

dbus.UInt64, "Interval",

1890

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

1491

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

1891

1492

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

1892

1493

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

1893

1494

invalidate_only=True)

1894

1495

1895

1496

del notifychangeproperty

1896

1497

1897

1498

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

1898

1499

try:

1899

1500

self.remove_from_connection()

1902

1503

if hasattr(DBusObjectWithProperties, "__del__"):

1903

1504

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

1904

1505

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

1905

1506

1906

1507

def checker_callback(self, source, condition,

1907

1508

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

1908

1509

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

1924

1525

| self.last_checker_signal),

1925

1526

dbus.String(command))

1926

1527

return ret

1927

1528

1928

1529

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

1929

1530

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

1930

1531

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

1934

1535

# Emit D-Bus signal

1935

1536

self.CheckerStarted(self.current_checker_command)

1936

1537

return r

1937

1538

1938

1539

def _reset_approved(self):

1939

1540

self.approved = None

1940

1541

return False

1941

1542

1942

1543

def approve(self, value=True):

1943

1544

self.approved = value

1944

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

1945

* 1000), self._reset_approved)

1545

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

1546

* 1000), self._reset_approved)

1946

1547

self.send_changedstate()

1947

1948

# D-Bus methods, signals & properties

1949

1950

# Interfaces

1951

1952

# Signals

1953

1548

1549

## D-Bus methods, signals & properties

1550

1551

## Interfaces

1552

1553

## Signals

1554

1954

1555

# CheckerCompleted - signal

1955

1556

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

1956

1557

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

1957

1558

"D-Bus signal"

1958

1559

pass

1959

1560

1960

1561

# CheckerStarted - signal

1961

1562

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

1962

1563

def CheckerStarted(self, command):

1963

1564

"D-Bus signal"

1964

1565

pass

1965

1566

1966

1567

# PropertyChanged - signal

1967

1568

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

1968

1569

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

1969

1570

def PropertyChanged(self, property, value):

1970

1571

"D-Bus signal"

1971

1572

pass

1972

1573

1973

1574

# GotSecret - signal

1974

1575

@dbus.service.signal(_interface)

1975

1576

def GotSecret(self):

1978

1579

server to mandos-client

1979

1580

"""

1980

1581

pass

1981

1582

1982

1583

# Rejected - signal

1983

1584

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

1984

1585

def Rejected(self, reason):

1985

1586

"D-Bus signal"

1986

1587

pass

1987

1588

1988

1589

# NeedApproval - signal

1989

1590

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

1990

1591

def NeedApproval(self, timeout, default):

1991

1592

"D-Bus signal"

1992

1593

return self.need_approval()

1993

1994

# Methods

1995

1594

1595

## Methods

1596

1996

1597

# Approve - method

1997

1598

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

1998

1599

def Approve(self, value):

1999

1600

self.approve(value)

2000

1601

2001

1602

# CheckedOK - method

2002

1603

@dbus.service.method(_interface)

2003

1604

def CheckedOK(self):

2004

1605

self.checked_ok()

2005

1606

2006

1607

# Enable - method

2007

1608

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

2008

1609

@dbus.service.method(_interface)

2009

1610

def Enable(self):

2010

1611

"D-Bus method"

2011

1612

self.enable()

2012

1613

2013

1614

# StartChecker - method

2014

1615

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

2015

1616

@dbus.service.method(_interface)

2016

1617

def StartChecker(self):

2017

1618

"D-Bus method"

2018

1619

self.start_checker()

2019

1620

2020

1621

# Disable - method

2021

1622

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

2022

1623

@dbus.service.method(_interface)

2023

1624

def Disable(self):

2024

1625

"D-Bus method"

2025

1626

self.disable()

2026

1627

2027

1628

# StopChecker - method

2028

1629

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

2029

1630

@dbus.service.method(_interface)

2030

1631

def StopChecker(self):

2031

1632

self.stop_checker()

2032

2033

# Properties

2034

1633

1634

## Properties

1635

2035

1636

# ApprovalPending - property

2036

1637

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

2037

1638

def ApprovalPending_dbus_property(self):

2038

1639

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

2039

1640

2040

1641

# ApprovedByDefault - property

2041

1642

@dbus_service_property(_interface,

2042

1643

signature="b",

2045

1646

if value is None: # get

2046

1647

return dbus.Boolean(self.approved_by_default)

2047

1648

self.approved_by_default = bool(value)

2048

1649

2049

1650

# ApprovalDelay - property

2050

1651

@dbus_service_property(_interface,

2051

1652

signature="t",

2055

1656

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

2056

1657

* 1000)

2057

1658

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

2058

1659

2059

1660

# ApprovalDuration - property

2060

1661

@dbus_service_property(_interface,

2061

1662

signature="t",

2065

1666

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

2066

1667

* 1000)

2067

1668

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

2068

1669

2069

1670

# Name - property

2070

1671

@dbus_annotations(

2071

1672

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

2072

1673

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

2073

1674

def Name_dbus_property(self):

2074

1675

return dbus.String(self.name)

2075

2076

# KeyID - property

2077

@dbus_annotations(

2078

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

2079

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

2080

def KeyID_dbus_property(self):

2081

return dbus.String(self.key_id)

2082

1676

2083

1677

# Fingerprint - property

2084

1678

@dbus_annotations(

2085

1679

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

2086

1680

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

2087

1681

def Fingerprint_dbus_property(self):

2088

1682

return dbus.String(self.fingerprint)

2089

1683

2090

1684

# Host - property

2091

1685

@dbus_service_property(_interface,

2092

1686

signature="s",

2095

1689

if value is None: # get

2096

1690

return dbus.String(self.host)

2097

1691

self.host = str(value)

2098

1692

2099

1693

# Created - property

2100

1694

@dbus_annotations(

2101

1695

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

2102

1696

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

2103

1697

def Created_dbus_property(self):

2104

1698

return datetime_to_dbus(self.created)

2105

1699

2106

1700

# LastEnabled - property

2107

1701

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

2108

1702

def LastEnabled_dbus_property(self):

2109

1703

return datetime_to_dbus(self.last_enabled)

2110

1704

2111

1705

# Enabled - property

2112

1706

@dbus_service_property(_interface,

2113

1707

signature="b",

2119

1713

self.enable()

2120

1714

else:

2121

1715

self.disable()

2122

1716

2123

1717

# LastCheckedOK - property

2124

1718

@dbus_service_property(_interface,

2125

1719

signature="s",

2129

1723

self.checked_ok()

2130

1724

return

2131

1725

return datetime_to_dbus(self.last_checked_ok)

2132

1726

2133

1727

# LastCheckerStatus - property

2134

1728

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

2135

1729

def LastCheckerStatus_dbus_property(self):

2136

1730

return dbus.Int16(self.last_checker_status)

2137

1731

2138

1732

# Expires - property

2139

1733

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

2140

1734

def Expires_dbus_property(self):

2141

1735

return datetime_to_dbus(self.expires)

2142

1736

2143

1737

# LastApprovalRequest - property

2144

1738

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

2145

1739

def LastApprovalRequest_dbus_property(self):

2146

1740

return datetime_to_dbus(self.last_approval_request)

2147

1741

2148

1742

# Timeout - property

2149

1743

@dbus_service_property(_interface,

2150

1744

signature="t",

2165

1759

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

2166

1760

is None):

2167

1761

return

2168

GLib.source_remove(self.disable_initiator_tag)

2169

self.disable_initiator_tag = GLib.timeout_add(

1762

gobject.source_remove(self.disable_initiator_tag)

1763

self.disable_initiator_tag = gobject.timeout_add(

2170

1764

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

2171

1765

self.disable)

2172

1766

2173

1767

# ExtendedTimeout - property

2174

1768

@dbus_service_property(_interface,

2175

1769

signature="t",

2179

1773

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

2180

1774

* 1000)

2181

1775

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

2182

1776

2183

1777

# Interval - property

2184

1778

@dbus_service_property(_interface,

2185

1779

signature="t",

2192

1786

return

2193

1787

if self.enabled:

2194

1788

# Reschedule checker run

2195

GLib.source_remove(self.checker_initiator_tag)

2196

self.checker_initiator_tag = GLib.timeout_add(

1789

gobject.source_remove(self.checker_initiator_tag)

1790

self.checker_initiator_tag = gobject.timeout_add(

2197

1791

value, self.start_checker)

2198

self.start_checker() # Start one now, too

2199

1792

self.start_checker() # Start one now, too

1793

2200

1794

# Checker - property

2201

1795

@dbus_service_property(_interface,

2202

1796

signature="s",

2205

1799

if value is None: # get

2206

1800

return dbus.String(self.checker_command)

2207

1801

self.checker_command = str(value)

2208

1802

2209

1803

# CheckerRunning - property

2210

1804

@dbus_service_property(_interface,

2211

1805

signature="b",

2217

1811

self.start_checker()

2218

1812

else:

2219

1813

self.stop_checker()

2220

1814

2221

1815

# ObjectPath - property

2222

1816

@dbus_annotations(

2223

1817

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

2224

1818

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

2225

1819

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

2226

1820

def ObjectPath_dbus_property(self):

2227

return self.dbus_object_path # is already a dbus.ObjectPath

2228

1821

return self.dbus_object_path # is already a dbus.ObjectPath

1822

2229

1823

# Secret = property

2230

1824

@dbus_annotations(

2231

1825

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

2236

1830

byte_arrays=True)

2237

1831

def Secret_dbus_property(self, value):

2238

1832

self.secret = bytes(value)

2239

1833

2240

1834

del _interface

2241

1835

2242

1836

2243

class ProxyClient:

2244

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

1837

class ProxyClient(object):

1838

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

2245

1839

self._pipe = child_pipe

2246

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

1840

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

2247

1841

if not self._pipe.recv():

2248

raise KeyError(key_id or fpr)

2249

1842

raise KeyError(fpr)

1843

2250

1844

def __getattribute__(self, name):

2251

1845

if name == '_pipe':

2252

1846

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

2255

1849

if data[0] == 'data':

2256

1850

return data[1]

2257

1851

if data[0] == 'function':

2258

1852

2259

1853

def func(*args, **kwargs):

2260

1854

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

2261

1855

return self._pipe.recv()[1]

2262

1856

2263

1857

return func

2264

1858

2265

1859

def __setattr__(self, name, value):

2266

1860

if name == '_pipe':

2267

1861

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

2270

1864

2271

1865

class ClientHandler(socketserver.BaseRequestHandler, object):

2272

1866

"""A class to handle client connections.

2273

1867

2274

1868

Instantiated once for each connection to handle it.

2275

1869

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

2276

1870

2277

1871

def handle(self):

2278

1872

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

2279

1873

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

2280

1874

str(self.client_address))

2281

1875

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

2282

1876

self.server.child_pipe.fileno())

2283

2284

session = gnutls.ClientSession(self.request)

2285

2286

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

2287

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

2288

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

2289

# "+DHE-DSS"))

1877

1878

session = gnutls.connection.ClientSession(

1879

self.request, gnutls.connection .X509Credentials())

1880

1881

# Note: gnutls.connection.X509Credentials is really a

1882

# generic GnuTLS certificate credentials object so long as

1883

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

1884

# here despite using OpenPGP certificates.

1885

1886

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

1887

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

1888

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

1889

# "+DHE-DSS"))

2290

1890

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

2291

1891

priority = self.server.gnutls_priority

2292

1892

if priority is None:

2293

1893

priority = "NORMAL"

2294

gnutls.priority_set_direct(session._c_object,

2295

priority.encode("utf-8"),

2296

None)

2297

1894

gnutls.library.functions.gnutls_priority_set_direct(

1895

session._c_object, priority, None)

1896

2298

1897

# Start communication using the Mandos protocol

2299

1898

# Get protocol number

2300

1899

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

2305

1904

except (ValueError, IndexError, RuntimeError) as error:

2306

1905

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

2307

1906

return

2308

1907

2309

1908

# Start GnuTLS connection

2310

1909

try:

2311

1910

session.handshake()

2312

except gnutls.Error as error:

1911

except gnutls.errors.GNUTLSError as error:

2313

1912

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

2314

1913

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

2315

1914

# established. Just abandon the request.

2316

1915

return

2317

1916

logger.debug("Handshake succeeded")

2318

1917

2319

1918

approval_required = False

2320

1919

try:

2321

if gnutls.has_rawpk:

2322

fpr = b""

2323

try:

2324

key_id = self.key_id(

2325

self.peer_certificate(session))

2326

except (TypeError, gnutls.Error) as error:

2327

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

2328

return

2329

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

2330

2331

else:

2332

key_id = b""

2333

try:

2334

fpr = self.fingerprint(

2335

self.peer_certificate(session))

2336

except (TypeError, gnutls.Error) as error:

2337

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

2338

return

2339

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

2340

2341

try:

2342

client = ProxyClient(child_pipe, key_id, fpr,

1920

try:

1921

fpr = self.fingerprint(

1922

self.peer_certificate(session))

1923

except (TypeError,

1924

gnutls.errors.GNUTLSError) as error:

1925

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

1926

return

1927

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

1928

1929

try:

1930

client = ProxyClient(child_pipe, fpr,

2343

1931

self.client_address)

2344

1932

except KeyError:

2345

1933

return

2346

1934

2347

1935

if client.approval_delay:

2348

1936

delay = client.approval_delay

2349

1937

client.approvals_pending += 1

2350

1938

approval_required = True

2351

1939

2352

1940

while True:

2353

1941

if not client.enabled:

2354

1942

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

2357

1945

# Emit D-Bus signal

2358

1946

client.Rejected("Disabled")

2359

1947

return

2360

1948

2361

1949

if client.approved or not client.approval_delay:

2362

# We are approved or approval is disabled

1950

#We are approved or approval is disabled

2363

1951

break

2364

1952

elif client.approved is None:

2365

1953

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

2376

1964

# Emit D-Bus signal

2377

1965

client.Rejected("Denied")

2378

1966

return

2379

2380

# wait until timeout or approved

1967

1968

#wait until timeout or approved

2381

1969

time = datetime.datetime.now()

2382

1970

client.changedstate.acquire()

2383

1971

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

2396

1984

break

2397

1985

else:

2398

1986

delay -= time2 - time

2399

2400

try:

2401

session.send(client.secret)

2402

except gnutls.Error as error:

2403

logger.warning("gnutls send failed",

2404

exc_info=error)

2405

return

2406

1987

1988

sent_size = 0

1989

while sent_size < len(client.secret):

1990

try:

1991

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

1992

except gnutls.errors.GNUTLSError as error:

1993

logger.warning("gnutls send failed",

1994

exc_info=error)

1995

return

1996

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

1997

len(client.secret) - (sent_size

1998

+ sent))

1999

sent_size += sent

2000

2407

2001

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

2408

2002

# bump the timeout using extended_timeout

2409

2003

client.bump_timeout(client.extended_timeout)

2410

2004

if self.server.use_dbus:

2411

2005

# Emit D-Bus signal

2412

2006

client.GotSecret()

2413

2007

2414

2008

finally:

2415

2009

if approval_required:

2416

2010

client.approvals_pending -= 1

2417

2011

try:

2418

2012

session.bye()

2419

except gnutls.Error as error:

2013

except gnutls.errors.GNUTLSError as error:

2420

2014

logger.warning("GnuTLS bye failed",

2421

2015

exc_info=error)

2422

2016

2423

2017

@staticmethod

2424

2018

def peer_certificate(session):

2425

"Return the peer's certificate as a bytestring"

2426

try:

2427

cert_type = gnutls.certificate_type_get2(session._c_object,

2428

gnutls.CTYPE_PEERS)

2429

except AttributeError:

2430

cert_type = gnutls.certificate_type_get(session._c_object)

2431

if gnutls.has_rawpk:

2432

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2433

else:

2434

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2435

# If not a valid certificate type...

2436

if cert_type not in valid_cert_types:

2437

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

2438

valid_cert_types)

2439

# ...return invalid data

2440

return b""

2019

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

2020

# If not an OpenPGP certificate...

2021

if (gnutls.library.functions.gnutls_certificate_type_get(

2022

session._c_object)

2023

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

2024

# ...do the normal thing

2025

return session.peer_certificate

2441

2026

list_size = ctypes.c_uint(1)

2442

cert_list = (gnutls.certificate_get_peers

2027

cert_list = (gnutls.library.functions

2028

.gnutls_certificate_get_peers

2443

2029

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

2444

2030

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

2445

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

2031

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

2032

" certificate")

2446

2033

if list_size.value == 0:

2447

2034

return None

2448

2035

cert = cert_list[0]

2449

2036

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

2450

2451

@staticmethod

2452

def key_id(certificate):

2453

"Convert a certificate bytestring to a hexdigit key ID"

2454

# New GnuTLS "datum" with the public key

2455

datum = gnutls.datum_t(

2456

ctypes.cast(ctypes.c_char_p(certificate),

2457

ctypes.POINTER(ctypes.c_ubyte)),

2458

ctypes.c_uint(len(certificate)))

2459

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

2460

# New empty GnuTLS certificate

2461

pubkey = gnutls.pubkey_t()

2462

gnutls.pubkey_init(ctypes.byref(pubkey))

2463

# Import the raw public key into the certificate

2464

gnutls.pubkey_import(pubkey,

2465

ctypes.byref(datum),

2466

gnutls.X509_FMT_DER)

2467

# New buffer for the key ID

2468

buf = ctypes.create_string_buffer(32)

2469

buf_len = ctypes.c_size_t(len(buf))

2470

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

2471

gnutls.pubkey_get_key_id(pubkey,

2472

gnutls.KEYID_USE_SHA256,

2473

ctypes.cast(ctypes.byref(buf),

2474

ctypes.POINTER(ctypes.c_ubyte)),

2475

ctypes.byref(buf_len))

2476

# Deinit the certificate

2477

gnutls.pubkey_deinit(pubkey)

2478

2479

# Convert the buffer to a Python bytestring

2480

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

2481

# Convert the bytestring to hexadecimal notation

2482

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

2483

return hex_key_id

2484

2037

2485

2038

@staticmethod

2486

2039

def fingerprint(openpgp):

2487

2040

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2488

2041

# New GnuTLS "datum" with the OpenPGP public key

2489

datum = gnutls.datum_t(

2042

datum = gnutls.library.types.gnutls_datum_t(

2490

2043

ctypes.cast(ctypes.c_char_p(openpgp),

2491

2044

ctypes.POINTER(ctypes.c_ubyte)),

2492

2045

ctypes.c_uint(len(openpgp)))

2493

2046

# New empty GnuTLS certificate

2494

crt = gnutls.openpgp_crt_t()

2495

gnutls.openpgp_crt_init(ctypes.byref(crt))

2047

crt = gnutls.library.types.gnutls_openpgp_crt_t()

2048

gnutls.library.functions.gnutls_openpgp_crt_init(

2049

ctypes.byref(crt))

2496

2050

# Import the OpenPGP public key into the certificate

2497

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

2498

gnutls.OPENPGP_FMT_RAW)

2051

gnutls.library.functions.gnutls_openpgp_crt_import(

2052

crt, ctypes.byref(datum),

2053

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

2499

2054

# Verify the self signature in the key

2500

2055

crtverify = ctypes.c_uint()

2501

gnutls.openpgp_crt_verify_self(crt, 0,

2502

ctypes.byref(crtverify))

2056

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

2057

crt, 0, ctypes.byref(crtverify))

2503

2058

if crtverify.value != 0:

2504

gnutls.openpgp_crt_deinit(crt)

2505

raise gnutls.CertificateSecurityError(code

2506

=crtverify.value)

2059

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2060

raise gnutls.errors.CertificateSecurityError(

2061

"Verify failed")

2507

2062

# New buffer for the fingerprint

2508

2063

buf = ctypes.create_string_buffer(20)

2509

2064

buf_len = ctypes.c_size_t()

2510

2065

# Get the fingerprint from the certificate into the buffer

2511

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

2512

ctypes.byref(buf_len))

2066

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

2067

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

2513

2068

# Deinit the certificate

2514

gnutls.openpgp_crt_deinit(crt)

2069

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2515

2070

# Convert the buffer to a Python bytestring

2516

2071

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

2517

2072

# Convert the bytestring to hexadecimal notation

2519

2074

return hex_fpr

2520

2075

2521

2076

2522

class MultiprocessingMixIn:

2077

class MultiprocessingMixIn(object):

2523

2078

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

2524

2079

2525

2080

def sub_process_main(self, request, address):

2526

2081

try:

2527

2082

self.finish_request(request, address)

2528

2083

except Exception:

2529

2084

self.handle_error(request, address)

2530

2085

self.close_request(request)

2531

2086

2532

2087

def process_request(self, request, address):

2533

2088

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

2534

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

2535

args=(request, address))

2089

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

2090

args = (request, address))

2536

2091

proc.start()

2537

2092

return proc

2538

2093

2539

2094

2540

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

2095

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2541

2096

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

2542

2097

2543

2098

def process_request(self, request, client_address):

2544

2099

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

2545

2100

2546

2101

This function creates a new pipe in self.pipe

2547

2102

"""

2548

2103

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2549

2104

2550

2105

proc = MultiprocessingMixIn.process_request(self, request,

2551

2106

client_address)

2552

2107

self.child_pipe.close()

2553

2108

self.add_pipe(parent_pipe, proc)

2554

2109

2555

2110

def add_pipe(self, parent_pipe, proc):

2556

2111

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

2557

2112

raise NotImplementedError()

2558

2113

2559

2114

2560

2115

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2561

socketserver.TCPServer):

2116

socketserver.TCPServer, object):

2562

2117

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

2563

2118

2564

2119

Attributes:

2565

2120

enabled: Boolean; whether this server is activated yet

2566

2121

interface: None or a network interface name (string)

2567

2122

use_ipv6: Boolean; to use IPv6 or not

2568

2123

"""

2569

2124

2570

2125

def __init__(self, server_address, RequestHandlerClass,

2571

2126

interface=None,

2572

2127

use_ipv6=True,

2582

2137

self.socketfd = socketfd

2583

2138

# Save the original socket.socket() function

2584

2139

self.socket_socket = socket.socket

2585

2586

2140

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

2587

#

2141

#

2588

2142

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

2589

2143

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

2590

2144

# patching socket.socket.)

2591

#

2145

#

2592

2146

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

2593

2147

@functools.wraps(socket.socket)

2594

2148

def socket_wrapper(*args, **kwargs):

2606

2160

# socket_wrapper(), if socketfd was set.

2607

2161

socketserver.TCPServer.__init__(self, server_address,

2608

2162

RequestHandlerClass)

2609

2163

2610

2164

def server_bind(self):

2611

2165

"""This overrides the normal server_bind() function

2612

2166

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

2613

2167

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

2614

global SO_BINDTODEVICE

2615

2168

if self.interface is not None:

2616

2169

if SO_BINDTODEVICE is None:

2617

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

2618

# common enough.

2619

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

2620

SO_BINDTODEVICE = 25

2621

try:

2622

self.socket.setsockopt(

2623

socket.SOL_SOCKET, SO_BINDTODEVICE,

2624

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

2625

except socket.error as error:

2626

if error.errno == errno.EPERM:

2627

logger.error("No permission to bind to"

2628

" interface %s", self.interface)

2629

elif error.errno == errno.ENOPROTOOPT:

2630

logger.error("SO_BINDTODEVICE not available;"

2631

" cannot bind to interface %s",

2632

self.interface)

2633

elif error.errno == errno.ENODEV:

2634

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

2635

" cannot bind", self.interface)

2636

else:

2637

raise

2170

logger.error("SO_BINDTODEVICE does not exist;"

2171

" cannot bind to interface %s",

2172

self.interface)

2173

else:

2174

try:

2175

self.socket.setsockopt(

2176

socket.SOL_SOCKET, SO_BINDTODEVICE,

2177

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

2178

except socket.error as error:

2179

if error.errno == errno.EPERM:

2180

logger.error("No permission to bind to"

2181

" interface %s", self.interface)

2182

elif error.errno == errno.ENOPROTOOPT:

2183

logger.error("SO_BINDTODEVICE not available;"

2184

" cannot bind to interface %s",

2185

self.interface)

2186

elif error.errno == errno.ENODEV:

2187

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

2188

" cannot bind", self.interface)

2189

else:

2190

raise

2638

2191

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

2639

2192

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

2640

if self.server_address[1]:

2641

self.allow_reuse_address = True

2642

2193

if not self.server_address[0]:

2643

2194

if self.address_family == socket.AF_INET6:

2644

any_address = "::" # in6addr_any

2195

any_address = "::" # in6addr_any

2645

2196

else:

2646

any_address = "0.0.0.0" # INADDR_ANY

2197

any_address = "0.0.0.0" # INADDR_ANY

2647

2198

self.server_address = (any_address,

2648

2199

self.server_address[1])

2649

2200

elif not self.server_address[1]:

2659

2210

2660

2211

class MandosServer(IPv6_TCPServer):

2661

2212

"""Mandos server.

2662

2213

2663

2214

Attributes:

2664

2215

clients: set of Client objects

2665

2216

gnutls_priority GnuTLS priority string

2666

2217

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

2667

2668

Assumes a GLib.MainLoop event loop.

2218

2219

Assumes a gobject.MainLoop event loop.

2669

2220

"""

2670

2221

2671

2222

def __init__(self, server_address, RequestHandlerClass,

2672

2223

interface=None,

2673

2224

use_ipv6=True,

2683

2234

self.gnutls_priority = gnutls_priority

2684

2235

IPv6_TCPServer.__init__(self, server_address,

2685

2236

RequestHandlerClass,

2686

interface=interface,

2687

use_ipv6=use_ipv6,

2688

socketfd=socketfd)

2689

2237

interface = interface,

2238

use_ipv6 = use_ipv6,

2239

socketfd = socketfd)

2240

2690

2241

def server_activate(self):

2691

2242

if self.enabled:

2692

2243

return socketserver.TCPServer.server_activate(self)

2693

2244

2694

2245

def enable(self):

2695

2246

self.enabled = True

2696

2247

2697

2248

def add_pipe(self, parent_pipe, proc):

2698

2249

# Call "handle_ipc" for both data and EOF events

2699

GLib.io_add_watch(

2700

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

2701

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

2250

gobject.io_add_watch(

2251

parent_pipe.fileno(),

2252

gobject.IO_IN | gobject.IO_HUP,

2702

2253

functools.partial(self.handle_ipc,

2703

parent_pipe=parent_pipe,

2704

proc=proc))

2705

2254

parent_pipe = parent_pipe,

2255

proc = proc))

2256

2706

2257

def handle_ipc(self, source, condition,

2707

2258

parent_pipe=None,

2708

proc=None,

2259

proc = None,

2709

2260

client_object=None):

2710

2261

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

2711

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

2262

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

2712

2263

# Wait for other process to exit

2713

2264

proc.join()

2714

2265

return False

2715

2266

2716

2267

# Read a request from the child

2717

2268

request = parent_pipe.recv()

2718

2269

command = request[0]

2719

2270

2720

2271

if command == 'init':

2721

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

2722

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

2723

address = request[3]

2724

2725

for c in self.clients.values():

2726

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2727

continue

2728

if key_id and c.key_id == key_id:

2729

client = c

2730

break

2731

if fpr and c.fingerprint == fpr:

2272

fpr = request[1]

2273

address = request[2]

2274

2275

for c in self.clients.itervalues():

2276

if c.fingerprint == fpr:

2732

2277

client = c

2733

2278

break

2734

2279

else:

2735

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

2736

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

2280

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

2281

"dress: %s", fpr, address)

2737

2282

if self.use_dbus:

2738

2283

# Emit D-Bus signal

2739

mandos_dbus_service.ClientNotFound(key_id or fpr,

2284

mandos_dbus_service.ClientNotFound(fpr,

2740

2285

address[0])

2741

2286

parent_pipe.send(False)

2742

2287

return False

2743

2744

GLib.io_add_watch(

2745

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

2746

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

2288

2289

gobject.io_add_watch(

2290

parent_pipe.fileno(),

2291

gobject.IO_IN | gobject.IO_HUP,

2747

2292

functools.partial(self.handle_ipc,

2748

parent_pipe=parent_pipe,

2749

proc=proc,

2750

client_object=client))

2293

parent_pipe = parent_pipe,

2294

proc = proc,

2295

client_object = client))

2751

2296

parent_pipe.send(True)

2752

2297

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

2753

2298

# same fileno

2756

2301

funcname = request[1]

2757

2302

args = request[2]

2758

2303

kwargs = request[3]

2759

2304

2760

2305

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

2761

2306

funcname)(*args,

2762

2307

**kwargs)))

2763

2308

2764

2309

if command == 'getattr':

2765

2310

attrname = request[1]

2766

2311

if isinstance(client_object.__getattribute__(attrname),

2767

collections.abc.Callable):

2312

collections.Callable):

2768

2313

parent_pipe.send(('function', ))

2769

2314

else:

2770

2315

parent_pipe.send((

2771

2316

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

2772

2317

2773

2318

if command == 'setattr':

2774

2319

attrname = request[1]

2775

2320

value = request[2]

2776

2321

setattr(client_object, attrname, value)

2777

2322

2778

2323

return True

2779

2324

2780

2325

2781

2326

def rfc3339_duration_to_delta(duration):

2782

2327

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

2783

2784

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

2785

True

2786

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

2787

True

2788

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

2789

True

2790

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

2791

True

2792

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

2793

True

2794

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

2795

True

2796

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

2797

True

2328

2329

>>> rfc3339_duration_to_delta("P7D")

2330

datetime.timedelta(7)

2331

>>> rfc3339_duration_to_delta("PT60S")

2332

datetime.timedelta(0, 60)

2333

>>> rfc3339_duration_to_delta("PT60M")

2334

datetime.timedelta(0, 3600)

2335

>>> rfc3339_duration_to_delta("PT24H")

2336

datetime.timedelta(1)

2337

>>> rfc3339_duration_to_delta("P1W")

2338

datetime.timedelta(7)

2339

>>> rfc3339_duration_to_delta("PT5M30S")

2340

datetime.timedelta(0, 330)

2341

>>> rfc3339_duration_to_delta("P1DT3M20S")

2342

datetime.timedelta(1, 200)

2798

2343

"""

2799

2344

2800

2345

# Parsing an RFC 3339 duration with regular expressions is not

2801

2346

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

2802

2347

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

2803

2348

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

2804

2349

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

2805

2350

# avoid excessive use of external libraries.

2806

2351

2807

2352

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

2808

2353

Token = collections.namedtuple("Token", (

2809

2354

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

2842

2387

frozenset((token_year, token_month,

2843

2388

token_day, token_time,

2844

2389

token_week)))

2845

# Define starting values:

2846

# Value so far

2847

value = datetime.timedelta()

2390

# Define starting values

2391

value = datetime.timedelta() # Value so far

2848

2392

found_token = None

2849

# Following valid tokens

2850

followers = frozenset((token_duration, ))

2851

# String left to parse

2852

s = duration

2393

followers = frozenset((token_duration, )) # Following valid tokens

2394

s = duration # String left to parse

2853

2395

# Loop until end token is found

2854

2396

while found_token is not token_end:

2855

2397

# Search for any currently valid tokens

2879

2421

2880

2422

def string_to_delta(interval):

2881

2423

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

2882

2883

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

2884

True

2885

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

2886

True

2887

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

2888

True

2889

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

2890

True

2891

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

2892

True

2893

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

2894

True

2424

2425

>>> string_to_delta('7d')

2426

datetime.timedelta(7)

2427

>>> string_to_delta('60s')

2428

datetime.timedelta(0, 60)

2429

>>> string_to_delta('60m')

2430

datetime.timedelta(0, 3600)

2431

>>> string_to_delta('24h')

2432

datetime.timedelta(1)

2433

>>> string_to_delta('1w')

2434

datetime.timedelta(7)

2435

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

2436

datetime.timedelta(0, 330)

2895

2437

"""

2896

2438

2897

2439

try:

2898

2440

return rfc3339_duration_to_delta(interval)

2899

2441

except ValueError:

2900

2442

pass

2901

2443

2902

2444

timevalue = datetime.timedelta(0)

2903

2445

for s in interval.split():

2904

2446

try:

2922

2464

return timevalue

2923

2465

2924

2466

2925

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

2467

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

2926

2468

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

2927

2469

2928

2470

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

2929

2471

if os.fork():

2930

2472

sys.exit()

2948

2490

2949

2491

2950

2492

def main():

2951

2493

2952

2494

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

2953

2495

# Parsing of options, both command line and config file

2954

2496

2955

2497

parser = argparse.ArgumentParser()

2956

2498

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

2957

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

2499

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

2958

2500

help="show version number and exit")

2959

2501

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

2960

2502

help="Bind to interface IF")

2996

2538

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

2997

2539

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

2998

2540

default=None)

2999

2541

3000

2542

options = parser.parse_args()

3001

2543

2544

if options.check:

2545

import doctest

2546

fail_count, test_count = doctest.testmod()

2547

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

2548

3002

2549

# Default values for config file for server-global settings

3003

if gnutls.has_rawpk:

3004

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

3005

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

3006

else:

3007

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

3008

":+SIGN-DSA-SHA256")

3009

server_defaults = {"interface": "",

3010

"address": "",

3011

"port": "",

3012

"debug": "False",

3013

"priority": priority,

3014

"servicename": "Mandos",

3015

"use_dbus": "True",

3016

"use_ipv6": "True",

3017

"debuglevel": "",

3018

"restore": "True",

3019

"socket": "",

3020

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

3021

"foreground": "False",

3022

"zeroconf": "True",

3023

}

3024

del priority

3025

2550

server_defaults = { "interface": "",

2551

"address": "",

2552

"port": "",

2553

"debug": "False",

2554

"priority":

2555

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

2556

":+SIGN-DSA-SHA256",

2557

"servicename": "Mandos",

2558

"use_dbus": "True",

2559

"use_ipv6": "True",

2560

"debuglevel": "",

2561

"restore": "True",

2562

"socket": "",

2563

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

2564

"foreground": "False",

2565

"zeroconf": "True",

2566

}

2567

3026

2568

# Parse config file for server-global settings

3027

server_config = configparser.ConfigParser(server_defaults)

2569

server_config = configparser.SafeConfigParser(server_defaults)

3028

2570

del server_defaults

3029

2571

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

3030

# Convert the ConfigParser object to a dict

2572

# Convert the SafeConfigParser object to a dict

3031

2573

server_settings = server_config.defaults()

3032

2574

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

3033

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

3034

"foreground", "zeroconf"):

2575

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

3035

2576

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

3036

2577

option)

3037

2578

if server_settings["port"]:

3047

2588

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

3048

2589

["socket"])

3049

2590

del server_config

3050

2591

3051

2592

# Override the settings from the config file with command line

3052

2593

# options, if set.

3053

2594

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

3071

2612

if server_settings["debug"]:

3072

2613

server_settings["foreground"] = True

3073

2614

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

3074

2615

3075

2616

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

3076

2617

3077

2618

if (not server_settings["zeroconf"]

3078

2619

and not (server_settings["port"]

3079

2620

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

3080

2621

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

3081

2622

3082

2623

# For convenience

3083

2624

debug = server_settings["debug"]

3084

2625

debuglevel = server_settings["debuglevel"]

3088

2629

stored_state_file)

3089

2630

foreground = server_settings["foreground"]

3090

2631

zeroconf = server_settings["zeroconf"]

3091

2632

3092

2633

if debug:

3093

2634

initlogger(debug, logging.DEBUG)

3094

2635

else:

3097

2638

else:

3098

2639

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

3099

2640

initlogger(debug, level)

3100

2641

3101

2642

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

3102

2643

syslogger.setFormatter(

3103

2644

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

3104

2645

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

3105

2646

server_settings["servicename"])))

3106

2647

3107

2648

# Parse config file with clients

3108

client_config = configparser.ConfigParser(Client.client_defaults)

2649

client_config = configparser.SafeConfigParser(Client

2650

.client_defaults)

3109

2651

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

3110

2652

"clients.conf"))

3111

2653

3112

2654

global mandos_dbus_service

3113

2655

mandos_dbus_service = None

3114

2656

3115

2657

socketfd = None

3116

2658

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

3117

2659

socketfd = server_settings["socket"]

3133

2675

except IOError as e:

3134

2676

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

3135

2677

exc_info=e)

3136

3137

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

3138

("mandos", "mandos"),

3139

("nobody", "nogroup")):

2678

2679

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

3140

2680

try:

3141

2681

uid = pwd.getpwnam(name).pw_uid

3142

gid = pwd.getpwnam(group).pw_gid

2682

gid = pwd.getpwnam(name).pw_gid

3143

2683

break

3144

2684

except KeyError:

3145

2685

continue

3149

2689

try:

3150

2690

os.setgid(gid)

3151

2691

os.setuid(uid)

3152

if debug:

3153

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

3154

gid))

3155

2692

except OSError as error:

3156

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

3157

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

3158

2693

if error.errno != errno.EPERM:

3159

2694

raise

3160

2695

3161

2696

if debug:

3162

2697

# Enable all possible GnuTLS debugging

3163

2698

3164

2699

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

3165

2700

# - GnuTLS manual

3166

gnutls.global_set_log_level(11)

3167

3168

@gnutls.log_func

2701

gnutls.library.functions.gnutls_global_set_log_level(11)

2702

2703

@gnutls.library.types.gnutls_log_func

3169

2704

def debug_gnutls(level, string):

3170

2705

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

3171

3172

gnutls.global_set_log_function(debug_gnutls)

3173

2706

2707

gnutls.library.functions.gnutls_global_set_log_function(

2708

debug_gnutls)

2709

3174

2710

# Redirect stdin so all checkers get /dev/null

3175

2711

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

3176

2712

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

3177

2713

if null > 2:

3178

2714

os.close(null)

3179

2715

3180

2716

# Need to fork before connecting to D-Bus

3181

2717

if not foreground:

3182

2718

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

3183

2719

daemon()

3184

3185

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

3186

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

3187

# need to inform GLib that threads will be used.

3188

GLib.threads_init()

3189

2720

2721

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

2722

# need to inform gobject that threads will be used.

2723

gobject.threads_init()

2724

3190

2725

global main_loop

3191

2726

# From the Avahi example code

3192

2727

DBusGMainLoop(set_as_default=True)

3193

main_loop = GLib.MainLoop()

2728

main_loop = gobject.MainLoop()

3194

2729

bus = dbus.SystemBus()

3195

2730

# End of Avahi example code

3196

2731

if use_dbus:

3209

2744

if zeroconf:

3210

2745

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3211

2746

service = AvahiServiceToSyslog(

3212

name=server_settings["servicename"],

3213

servicetype="_mandos._tcp",

3214

protocol=protocol,

3215

bus=bus)

2747

name = server_settings["servicename"],

2748

servicetype = "_mandos._tcp",

2749

protocol = protocol,

2750

bus = bus)

3216

2751

if server_settings["interface"]:

3217

2752

service.interface = if_nametoindex(

3218

2753

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

3219

2754

3220

2755

global multiprocessing_manager

3221

2756

multiprocessing_manager = multiprocessing.Manager()

3222

2757

3223

2758

client_class = Client

3224

2759

if use_dbus:

3225

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

3226

2760

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

2761

3227

2762

client_settings = Client.config_parser(client_config)

3228

2763

old_client_settings = {}

3229

2764

clients_data = {}

3230

2765

3231

2766

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

3232

2767

global wnull

3233

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

2768

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

3234

2769

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

3235

2770

# mode

3236

2771

if debug or not foreground:

3237

2772

wnull.close()

3238

2773

3239

2774

# Get client data and settings from last running state.

3240

2775

if server_settings["restore"]:

3241

2776

try:

3242

2777

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

3243

if sys.version_info.major == 2:

3244

clients_data, old_client_settings = pickle.load(

3245

stored_state)

3246

else:

3247

bytes_clients_data, bytes_old_client_settings = (

3248

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

3249

# Fix bytes to strings

3250

# clients_data

3251

# .keys()

3252

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

3253

if isinstance(key, bytes)

3254

else key): value

3255

for key, value in

3256

bytes_clients_data.items()}

3257

del bytes_clients_data

3258

for key in clients_data:

3259

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

3260

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

3261

for k, v in

3262

clients_data[key].items()}

3263

clients_data[key] = value

3264

# .client_structure

3265

value["client_structure"] = [

3266

(s.decode("utf-8")

3267

if isinstance(s, bytes)

3268

else s) for s in

3269

value["client_structure"]]

3270

# .name, .host, and .checker_command

3271

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

3272

if isinstance(value[k], bytes):

3273

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

3274

if "key_id" not in value:

3275

value["key_id"] = ""

3276

elif "fingerprint" not in value:

3277

value["fingerprint"] = ""

3278

# old_client_settings

3279

# .keys()

3280

old_client_settings = {

3281

(key.decode("utf-8")

3282

if isinstance(key, bytes)

3283

else key): value

3284

for key, value in

3285

bytes_old_client_settings.items()}

3286

del bytes_old_client_settings

3287

# .host and .checker_command

3288

for value in old_client_settings.values():

3289

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

3290

if isinstance(value[attribute], bytes):

3291

value[attribute] = (value[attribute]

3292

.decode("utf-8"))

2778

clients_data, old_client_settings = pickle.load(

2779

stored_state)

3293

2780

os.remove(stored_state_path)

3294

2781

except IOError as e:

3295

2782

if e.errno == errno.ENOENT:

3303

2790

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

3304

2791

"EOFError:",

3305

2792

exc_info=e)

3306

2793

3307

2794

with PGPEngine() as pgp:

3308

2795

for client_name, client in clients_data.items():

3309

2796

# Skip removed clients

3310

2797

if client_name not in client_settings:

3311

2798

continue

3312

2799

3313

2800

# Decide which value to use after restoring saved state.

3314

2801

# We have three different values: Old config file,

3315

2802

# new config file, and saved state.

3326

2813

client[name] = value

3327

2814

except KeyError:

3328

2815

pass

3329

2816

3330

2817

# Clients who has passed its expire date can still be

3331

2818

# enabled if its last checker was successful. A Client

3332

2819

# whose checker succeeded before we stored its state is

3365

2852

client_name))

3366

2853

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

3367

2854

["secret"])

3368

2855

3369

2856

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

3370

2857

for client_name in (set(old_client_settings)

3371

2858

- set(client_settings)):

3373

2860

for client_name in (set(client_settings)

3374

2861

- set(old_client_settings)):

3375

2862

clients_data[client_name] = client_settings[client_name]

3376

2863

3377

2864

# Create all client objects

3378

2865

for client_name, client in clients_data.items():

3379

2866

tcp_server.clients[client_name] = client_class(

3380

name=client_name,

3381

settings=client,

3382

server_settings=server_settings)

3383

2867

name = client_name,

2868

settings = client,

2869

server_settings = server_settings)

2870

3384

2871

if not tcp_server.clients:

3385

2872

logger.warning("No clients defined")

3386

2873

3387

2874

if not foreground:

3388

2875

if pidfile is not None:

3389

2876

pid = os.getpid()

3395

2882

pidfilename, pid)

3396

2883

del pidfile

3397

2884

del pidfilename

3398

3399

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

3400

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3401

lambda: main_loop.quit() and False)

3402

2885

2886

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

2887

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

2888

3403

2889

if use_dbus:

3404

2890

3405

2891

@alternate_dbus_interfaces(

3406

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

2892

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

3407

2893

class MandosDBusService(DBusObjectWithObjectManager):

3408

2894

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

3409

2895

3410

2896

def __init__(self):

3411

2897

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

3412

2898

3413

2899

_interface = "se.recompile.Mandos"

3414

2900

3415

2901

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

3416

2902

def ClientAdded(self, objpath):

3417

2903

"D-Bus signal"

3418

2904

pass

3419

2905

3420

2906

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

3421

def ClientNotFound(self, key_id, address):

2907

def ClientNotFound(self, fingerprint, address):

3422

2908

"D-Bus signal"

3423

2909

pass

3424

2910

3425

2911

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

3426

2912

"true"})

3427

2913

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

3428

2914

def ClientRemoved(self, objpath, name):

3429

2915

"D-Bus signal"

3430

2916

pass

3431

2917

3432

2918

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

3433

2919

"true"})

3434

2920

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

3435

2921

def GetAllClients(self):

3436

2922

"D-Bus method"

3437

2923

return dbus.Array(c.dbus_object_path for c in

3438

tcp_server.clients.values())

3439

2924

tcp_server.clients.itervalues())

2925

3440

2926

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

3441

2927

"true"})

3442

2928

@dbus.service.method(_interface,

3444

2930

def GetAllClientsWithProperties(self):

3445

2931

"D-Bus method"

3446

2932

return dbus.Dictionary(

3447

{c.dbus_object_path: c.GetAll(

2933

{ c.dbus_object_path: c.GetAll(

3448

2934

"se.recompile.Mandos.Client")

3449

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

2935

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

3450

2936

signature="oa{sv}")

3451

2937

3452

2938

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

3453

2939

def RemoveClient(self, object_path):

3454

2940

"D-Bus method"

3455

for c in tcp_server.clients.values():

2941

for c in tcp_server.clients.itervalues():

3456

2942

if c.dbus_object_path == object_path:

3457

2943

del tcp_server.clients[c.name]

3458

2944

c.remove_from_connection()

3462

2948

self.client_removed_signal(c)

3463

2949

return

3464

2950

raise KeyError(object_path)

3465

2951

3466

2952

del _interface

3467

2953

3468

2954

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3469

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

2955

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

3470

2956

def GetManagedObjects(self):

3471

2957

"""D-Bus method"""

3472

2958

return dbus.Dictionary(

3473

{client.dbus_object_path:

3474

dbus.Dictionary(

3475

{interface: client.GetAll(interface)

3476

for interface in

3477

client._get_all_interface_names()})

3478

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

3479

2959

{ client.dbus_object_path:

2960

dbus.Dictionary(

2961

{ interface: client.GetAll(interface)

2962

for interface in

2963

client._get_all_interface_names()})

2964

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

2965

3480

2966

def client_added_signal(self, client):

3481

2967

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

3482

2968

if use_dbus:

3484

2970

self.InterfacesAdded(

3485

2971

client.dbus_object_path,

3486

2972

dbus.Dictionary(

3487

{interface: client.GetAll(interface)

3488

for interface in

3489

client._get_all_interface_names()}))

2973

{ interface: client.GetAll(interface)

2974

for interface in

2975

client._get_all_interface_names()}))

3490

2976

# Old signal

3491

2977

self.ClientAdded(client.dbus_object_path)

3492

2978

3493

2979

def client_removed_signal(self, client):

3494

2980

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

3495

2981

if use_dbus:

3500

2986

# Old signal

3501

2987

self.ClientRemoved(client.dbus_object_path,

3502

2988

client.name)

3503

2989

3504

2990

mandos_dbus_service = MandosDBusService()

3505

3506

# Save modules to variables to exempt the modules from being

3507

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

3508

mp = multiprocessing

3509

wn = wnull

3510

2991

3511

2992

def cleanup():

3512

2993

"Cleanup function; run on exit"

3513

2994

if zeroconf:

3514

2995

service.cleanup()

3515

3516

mp.active_children()

3517

wn.close()

2996

2997

multiprocessing.active_children()

2998

wnull.close()

3518

2999

if not (tcp_server.clients or client_settings):

3519

3000

return

3520

3001

3521

3002

# Store client before exiting. Secrets are encrypted with key

3522

3003

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

3523

3004

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

3524

3005

clients = {}

3525

3006

with PGPEngine() as pgp:

3526

for client in tcp_server.clients.values():

3007

for client in tcp_server.clients.itervalues():

3527

3008

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

3528

3009

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

3529

3010

key)

3530

3011

client_dict = {}

3531

3012

3532

3013

# A list of attributes that can not be pickled

3533

3014

# + secret.

3534

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

3535

"checker", "server_settings"}

3015

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

3016

"checker", "server_settings" }

3536

3017

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

3537

3018

.Object):

3538

3019

exclude.add(name)

3539

3020

3540

3021

client_dict["encrypted_secret"] = (client

3541

3022

.encrypted_secret)

3542

3023

for attr in client.client_structure:

3543

3024

if attr not in exclude:

3544

3025

client_dict[attr] = getattr(client, attr)

3545

3026

3546

3027

clients[client.name] = client_dict

3547

3028

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

3548

3029

3549

3030

try:

3550

3031

with tempfile.NamedTemporaryFile(

3551

3032

mode='wb',

3553

3034

prefix='clients-',

3554

3035

dir=os.path.dirname(stored_state_path),

3555

3036

delete=False) as stored_state:

3556

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

3557

protocol=2)

3037

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

3558

3038

tempname = stored_state.name

3559

3039

os.rename(tempname, stored_state_path)

3560

3040

except (IOError, OSError) as e:

3570

3050

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

3571

3051

exc_info=e)

3572

3052

raise

3573

3053

3574

3054

# Delete all clients, and settings from config

3575

3055

while tcp_server.clients:

3576

3056

name, client = tcp_server.clients.popitem()

3579

3059

# Don't signal the disabling

3580

3060

client.disable(quiet=True)

3581

3061

# Emit D-Bus signal for removal

3582

if use_dbus:

3583

mandos_dbus_service.client_removed_signal(client)

3062

mandos_dbus_service.client_removed_signal(client)

3584

3063

client_settings.clear()

3585

3064

3586

3065

atexit.register(cleanup)

3587

3588

for client in tcp_server.clients.values():

3066

3067

for client in tcp_server.clients.itervalues():

3589

3068

if use_dbus:

3590

3069

# Emit D-Bus signal for adding

3591

3070

mandos_dbus_service.client_added_signal(client)

3592

3071

# Need to initiate checking of clients

3593

3072

if client.enabled:

3594

3073

client.init_checker()

3595

3074

3596

3075

tcp_server.enable()

3597

3076

tcp_server.server_activate()

3598

3077

3599

3078

# Find out what port we got

3600

3079

if zeroconf:

3601

3080

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

3606

3085

else: # IPv4

3607

3086

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

3608

3087

*tcp_server.socket.getsockname())

3609

3610

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

3611

3088

3089

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

3090

3612

3091

try:

3613

3092

if zeroconf:

3614

3093

# From the Avahi example code

3619

3098

cleanup()

3620

3099

sys.exit(1)

3621

3100

# End of Avahi example code

3622

3623

GLib.io_add_watch(

3624

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

3625

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

3626

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

3627

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

3628

3101

3102

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

3103

lambda *args, **kwargs:

3104

(tcp_server.handle_request

3105

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

3106

3629

3107

logger.debug("Starting main loop")

3630

3108

main_loop.run()

3631

3109

except AvahiError as error:

3640

3118

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

3641

3119

cleanup()

3642

3120

3643

3644

def should_only_run_tests():

3645

parser = argparse.ArgumentParser(add_help=False)

3646

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

3647

args, unknown_args = parser.parse_known_args()

3648

run_tests = args.check

3649

if run_tests:

3650

# Remove --check argument from sys.argv

3651

sys.argv[1:] = unknown_args

3652

return run_tests

3653

3654

# Add all tests from doctest strings

3655

def load_tests(loader, tests, none):

3656

import doctest

3657

tests.addTests(doctest.DocTestSuite())

3658

return tests

3659

3121

3660

3122

if __name__ == '__main__':

3661

try:

3662

if should_only_run_tests():

3663

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

3664

unittest.main()

3665

else:

3666

main()

3667

finally:

3668

logging.shutdown()

3123

main()