/mandos/trunk : revision 780

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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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import argparse

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import datetime

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import errno

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import gnutls.crypto

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import gnutls.connection

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import gnutls.errors

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import gnutls.library.functions

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import gnutls.library.constants

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import gnutls.library.types

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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 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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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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if sys.version_info.major == 2:

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__metaclass__ = type

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# Show warnings by default

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if not sys.warnoptions:

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import warnings

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warnings.simplefilter("default")

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# Try to find the value of SO_BINDTODEVICE:

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try:

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

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

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except AttributeError:

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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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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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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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if sys.version_info < (3, 2):

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configparser.Configparser = configparser.SafeConfigParser

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version = "1.8.9"

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version = "1.6.9"

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stored_state_file = "clients.pickle"

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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,

160

func.func_closure)

161

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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168

169

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

194

153

195

154

196

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

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def __init__(self):

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

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == b"gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

212

160

self.gnupgargs = ['--batch',

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'--homedir', self.tempdir,

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'--home', self.tempdir,

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'--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"):

218

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

219

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'--quiet',

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'--no-use-agent']

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220

166

def __enter__(self):

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167

return self

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168

223

169

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

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self._cleanup()

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return False

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172

227

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def __del__(self):

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self._cleanup()

229

175

230

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def _cleanup(self):

231

177

if self.tempdir is not None:

232

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# Delete contents of tempdir

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

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topdown=False):

180

topdown = False):

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for filename in files:

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

237

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for dirname in dirs:

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# Remove tempdir

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os.rmdir(self.tempdir)

241

187

self.tempdir = None

242

188

243

189

def password_encode(self, password):

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

245

191

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

250

196

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

251

197

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

252

198

return encoded

253

199

254

200

def encrypt(self, data, password):

255

201

passphrase = self.password_encode(password)

256

202

with tempfile.NamedTemporaryFile(

257

203

dir=self.tempdir) as passfile:

258

204

passfile.write(passphrase)

259

205

passfile.flush()

260

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

206

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

261

207

'--passphrase-file',

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208

passfile.name]

263

209

+ self.gnupgargs,

264

stdin=subprocess.PIPE,

265

stdout=subprocess.PIPE,

266

stderr=subprocess.PIPE)

267

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)

268

214

if proc.returncode != 0:

269

215

raise PGPError(err)

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216

return ciphertext

271

217

272

218

def decrypt(self, data, password):

273

219

passphrase = self.password_encode(password)

274

220

with tempfile.NamedTemporaryFile(

275

dir=self.tempdir) as passfile:

221

dir = self.tempdir) as passfile:

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222

passfile.write(passphrase)

277

223

passfile.flush()

278

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

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

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225

'--passphrase-file',

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226

passfile.name]

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+ self.gnupgargs,

282

stdin=subprocess.PIPE,

283

stdout=subprocess.PIPE,

284

stderr=subprocess.PIPE)

285

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

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stdin = subprocess.PIPE,

229

stdout = subprocess.PIPE,

230

stderr = subprocess.PIPE)

231

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

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232

if proc.returncode != 0:

287

233

raise PGPError(err)

288

234

return decrypted_plaintext

289

235

290

236

291

# Pretend that we have an Avahi module

292

class avahi:

293

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

294

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

295

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

296

PROTO_INET = 0 # avahi-common/address.h

297

PROTO_INET6 = 1 # avahi-common/address.h

298

DBUS_NAME = "org.freedesktop.Avahi"

299

DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

300

DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

301

DBUS_PATH_SERVER = "/"

302

303

@staticmethod

304

def string_array_to_txt_array(t):

305

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

306

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

307

ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

308

ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

309

ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

310

SERVER_INVALID = 0 # avahi-common/defs.h

311

SERVER_REGISTERING = 1 # avahi-common/defs.h

312

SERVER_RUNNING = 2 # avahi-common/defs.h

313

SERVER_COLLISION = 3 # avahi-common/defs.h

314

SERVER_FAILURE = 4 # avahi-common/defs.h

315

316

317

237

class AvahiError(Exception):

318

238

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

319

239

self.value = value

329

249

pass

330

250

331

251

332

class AvahiService:

252

class AvahiService(object):

333

253

"""An Avahi (Zeroconf) service.

334

254

335

255

Attributes:

336

256

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

337

257

Used to optionally bind to the specified interface.

349

269

server: D-Bus Server

350

270

bus: dbus.SystemBus()

351

271

"""

352

272

353

273

def __init__(self,

354

interface=avahi.IF_UNSPEC,

355

name=None,

356

servicetype=None,

357

port=None,

358

TXT=None,

359

domain="",

360

host="",

361

max_renames=32768,

362

protocol=avahi.PROTO_UNSPEC,

363

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):

364

284

self.interface = interface

365

285

self.name = name

366

286

self.type = servicetype

375

295

self.server = None

376

296

self.bus = bus

377

297

self.entry_group_state_changed_match = None

378

298

379

299

def rename(self, remove=True):

380

300

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

381

301

if self.rename_count >= self.max_renames:

401

321

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

402

322

self.cleanup()

403

323

os._exit(1)

404

324

405

325

def remove(self):

406

326

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

407

327

if self.entry_group_state_changed_match is not None:

409

329

self.entry_group_state_changed_match = None

410

330

if self.group is not None:

411

331

self.group.Reset()

412

332

413

333

def add(self):

414

334

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

415

335

self.remove()

432

352

dbus.UInt16(self.port),

433

353

avahi.string_array_to_txt_array(self.TXT))

434

354

self.group.Commit()

435

355

436

356

def entry_group_state_changed(self, state, error):

437

357

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

438

358

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

439

359

440

360

if state == avahi.ENTRY_GROUP_ESTABLISHED:

441

361

logger.debug("Zeroconf service established.")

442

362

elif state == avahi.ENTRY_GROUP_COLLISION:

446

366

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

447

367

str(error))

448

368

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

449

369

450

370

def cleanup(self):

451

371

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

452

372

if self.group is not None:

457

377

pass

458

378

self.group = None

459

379

self.remove()

460

380

461

381

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

462

382

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

463

383

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

492

412

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

493

413

else:

494

414

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

495

415

496

416

def activate(self):

497

417

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

498

418

if self.server is None:

509

429

class AvahiServiceToSyslog(AvahiService):

510

430

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

511

431

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

512

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

432

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

513

433

syslogger.setFormatter(logging.Formatter(

514

434

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

515

435

.format(self.name)))

516

436

return ret

517

437

518

519

# Pretend that we have a GnuTLS module

520

class gnutls:

521

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

522

523

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

524

if library is None:

525

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

526

_library = ctypes.cdll.LoadLibrary(library)

527

del library

528

529

# Unless otherwise indicated, the constants and types below are

530

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

531

532

# Constants

533

E_SUCCESS = 0

534

E_INTERRUPTED = -52

535

E_AGAIN = -28

536

CRT_OPENPGP = 2

537

CRT_RAWPK = 3

538

CLIENT = 2

539

SHUT_RDWR = 0

540

CRD_CERTIFICATE = 1

541

E_NO_CERTIFICATE_FOUND = -49

542

X509_FMT_DER = 0

543

NO_TICKETS = 1<<10

544

ENABLE_RAWPK = 1<<18

545

CTYPE_PEERS = 3

546

KEYID_USE_SHA256 = 1 # gnutls/x509.h

547

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

548

549

# Types

550

class session_int(ctypes.Structure):

551

_fields_ = []

552

session_t = ctypes.POINTER(session_int)

553

554

class certificate_credentials_st(ctypes.Structure):

555

_fields_ = []

556

certificate_credentials_t = ctypes.POINTER(

557

certificate_credentials_st)

558

certificate_type_t = ctypes.c_int

559

560

class datum_t(ctypes.Structure):

561

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

562

('size', ctypes.c_uint)]

563

564

class openpgp_crt_int(ctypes.Structure):

565

_fields_ = []

566

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

567

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

568

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

569

credentials_type_t = ctypes.c_int

570

transport_ptr_t = ctypes.c_void_p

571

close_request_t = ctypes.c_int

572

573

# Exceptions

574

class Error(Exception):

575

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

576

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

577

# code is passed, convert it to a string with

578

# gnutls.strerror()

579

self.code = code

580

if message is None and code is not None:

581

message = gnutls.strerror(code)

582

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

583

message, *args)

584

585

class CertificateSecurityError(Error):

586

pass

587

588

# Classes

589

class Credentials:

590

def __init__(self):

591

self._c_object = gnutls.certificate_credentials_t()

592

gnutls.certificate_allocate_credentials(

593

ctypes.byref(self._c_object))

594

self.type = gnutls.CRD_CERTIFICATE

595

596

def __del__(self):

597

gnutls.certificate_free_credentials(self._c_object)

598

599

class ClientSession:

600

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

601

self._c_object = gnutls.session_t()

602

gnutls_flags = gnutls.CLIENT

603

if gnutls.check_version(b"3.5.6"):

604

gnutls_flags |= gnutls.NO_TICKETS

605

if gnutls.has_rawpk:

606

gnutls_flags |= gnutls.ENABLE_RAWPK

607

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

608

del gnutls_flags

609

gnutls.set_default_priority(self._c_object)

610

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

611

gnutls.handshake_set_private_extensions(self._c_object,

612

True)

613

self.socket = socket

614

if credentials is None:

615

credentials = gnutls.Credentials()

616

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

617

ctypes.cast(credentials._c_object,

618

ctypes.c_void_p))

619

self.credentials = credentials

620

621

def __del__(self):

622

gnutls.deinit(self._c_object)

623

624

def handshake(self):

625

return gnutls.handshake(self._c_object)

626

627

def send(self, data):

628

data = bytes(data)

629

data_len = len(data)

630

while data_len > 0:

631

data_len -= gnutls.record_send(self._c_object,

632

data[-data_len:],

633

data_len)

634

635

def bye(self):

636

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

637

638

# Error handling functions

639

def _error_code(result):

640

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

641

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

642

if result >= 0:

643

return result

644

if result == gnutls.E_NO_CERTIFICATE_FOUND:

645

raise gnutls.CertificateSecurityError(code=result)

646

raise gnutls.Error(code=result)

647

648

def _retry_on_error(result, func, arguments):

649

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

650

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

651

while result < 0:

652

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

653

return _error_code(result)

654

result = func(*arguments)

655

return result

656

657

# Unless otherwise indicated, the function declarations below are

658

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

659

660

# Functions

661

priority_set_direct = _library.gnutls_priority_set_direct

662

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

663

ctypes.POINTER(ctypes.c_char_p)]

664

priority_set_direct.restype = _error_code

665

666

init = _library.gnutls_init

667

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

668

init.restype = _error_code

669

670

set_default_priority = _library.gnutls_set_default_priority

671

set_default_priority.argtypes = [session_t]

672

set_default_priority.restype = _error_code

673

674

record_send = _library.gnutls_record_send

675

record_send.argtypes = [session_t, ctypes.c_void_p,

676

ctypes.c_size_t]

677

record_send.restype = ctypes.c_ssize_t

678

record_send.errcheck = _retry_on_error

679

680

certificate_allocate_credentials = (

681

_library.gnutls_certificate_allocate_credentials)

682

certificate_allocate_credentials.argtypes = [

683

ctypes.POINTER(certificate_credentials_t)]

684

certificate_allocate_credentials.restype = _error_code

685

686

certificate_free_credentials = (

687

_library.gnutls_certificate_free_credentials)

688

certificate_free_credentials.argtypes = [

689

certificate_credentials_t]

690

certificate_free_credentials.restype = None

691

692

handshake_set_private_extensions = (

693

_library.gnutls_handshake_set_private_extensions)

694

handshake_set_private_extensions.argtypes = [session_t,

695

ctypes.c_int]

696

handshake_set_private_extensions.restype = None

697

698

credentials_set = _library.gnutls_credentials_set

699

credentials_set.argtypes = [session_t, credentials_type_t,

700

ctypes.c_void_p]

701

credentials_set.restype = _error_code

702

703

strerror = _library.gnutls_strerror

704

strerror.argtypes = [ctypes.c_int]

705

strerror.restype = ctypes.c_char_p

706

707

certificate_type_get = _library.gnutls_certificate_type_get

708

certificate_type_get.argtypes = [session_t]

709

certificate_type_get.restype = _error_code

710

711

certificate_get_peers = _library.gnutls_certificate_get_peers

712

certificate_get_peers.argtypes = [session_t,

713

ctypes.POINTER(ctypes.c_uint)]

714

certificate_get_peers.restype = ctypes.POINTER(datum_t)

715

716

global_set_log_level = _library.gnutls_global_set_log_level

717

global_set_log_level.argtypes = [ctypes.c_int]

718

global_set_log_level.restype = None

719

720

global_set_log_function = _library.gnutls_global_set_log_function

721

global_set_log_function.argtypes = [log_func]

722

global_set_log_function.restype = None

723

724

deinit = _library.gnutls_deinit

725

deinit.argtypes = [session_t]

726

deinit.restype = None

727

728

handshake = _library.gnutls_handshake

729

handshake.argtypes = [session_t]

730

handshake.restype = _error_code

731

handshake.errcheck = _retry_on_error

732

733

transport_set_ptr = _library.gnutls_transport_set_ptr

734

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

735

transport_set_ptr.restype = None

736

737

bye = _library.gnutls_bye

738

bye.argtypes = [session_t, close_request_t]

739

bye.restype = _error_code

740

bye.errcheck = _retry_on_error

741

742

check_version = _library.gnutls_check_version

743

check_version.argtypes = [ctypes.c_char_p]

744

check_version.restype = ctypes.c_char_p

745

746

_need_version = b"3.3.0"

747

if check_version(_need_version) is None:

748

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

749

.format(_need_version))

750

751

_tls_rawpk_version = b"3.6.6"

752

has_rawpk = bool(check_version(_tls_rawpk_version))

753

754

if has_rawpk:

755

# Types

756

class pubkey_st(ctypes.Structure):

757

_fields = []

758

pubkey_t = ctypes.POINTER(pubkey_st)

759

760

x509_crt_fmt_t = ctypes.c_int

761

762

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

763

pubkey_init = _library.gnutls_pubkey_init

764

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

765

pubkey_init.restype = _error_code

766

767

pubkey_import = _library.gnutls_pubkey_import

768

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

769

x509_crt_fmt_t]

770

pubkey_import.restype = _error_code

771

772

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

773

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

774

ctypes.POINTER(ctypes.c_ubyte),

775

ctypes.POINTER(ctypes.c_size_t)]

776

pubkey_get_key_id.restype = _error_code

777

778

pubkey_deinit = _library.gnutls_pubkey_deinit

779

pubkey_deinit.argtypes = [pubkey_t]

780

pubkey_deinit.restype = None

781

else:

782

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

783

784

openpgp_crt_init = _library.gnutls_openpgp_crt_init

785

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

786

openpgp_crt_init.restype = _error_code

787

788

openpgp_crt_import = _library.gnutls_openpgp_crt_import

789

openpgp_crt_import.argtypes = [openpgp_crt_t,

790

ctypes.POINTER(datum_t),

791

openpgp_crt_fmt_t]

792

openpgp_crt_import.restype = _error_code

793

794

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

795

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

796

ctypes.POINTER(ctypes.c_uint)]

797

openpgp_crt_verify_self.restype = _error_code

798

799

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

800

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

801

openpgp_crt_deinit.restype = None

802

803

openpgp_crt_get_fingerprint = (

804

_library.gnutls_openpgp_crt_get_fingerprint)

805

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

806

ctypes.c_void_p,

807

ctypes.POINTER(

808

ctypes.c_size_t)]

809

openpgp_crt_get_fingerprint.restype = _error_code

810

811

if check_version(b"3.6.4"):

812

certificate_type_get2 = _library.gnutls_certificate_type_get2

813

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

814

certificate_type_get2.restype = _error_code

815

816

# Remove non-public functions

817

del _error_code, _retry_on_error

818

819

820

438

def call_pipe(connection, # : multiprocessing.Connection

821

439

func, *args, **kwargs):

822

440

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

823

441

824

442

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

825

443

return value on the provided multiprocessing.Connection.

826

444

"""

827

445

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

828

446

connection.close()

829

447

830

831

class Client:

448

class Client(object):

832

449

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

833

450

834

451

Attributes:

835

452

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

836

453

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

837

454

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

838

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

839

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

840

running.

841

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

842

459

checker_command: string; External command which is run to check

843

460

if client lives. %() expansions are done at

844

461

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

845

462

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

846

checker_initiator_tag: a GLib event source tag, or None

463

checker_initiator_tag: a gobject event source tag, or None

847

464

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

848

465

client_structure: Object describing what attributes a client has

849

466

and is used for storing the client at exit

850

467

current_checker_command: string; current running checker_command

851

disable_initiator_tag: a GLib event source tag, or None

468

disable_initiator_tag: a gobject event source tag, or None

852

469

enabled: bool()

853

470

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

854

uniquely identify an OpenPGP client

855

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

856

a client using raw public keys

471

uniquely identify the client

857

472

host: string; available for use by the checker command

858

473

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

859

474

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

875

490

disabled, or None

876

491

server_settings: The server_settings dict from main()

877

492

"""

878

493

879

494

runtime_expansions = ("approval_delay", "approval_duration",

880

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

495

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

881

496

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

882

497

"last_approval_request", "last_checked_ok",

883

498

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

892

507

"approved_by_default": "True",

893

508

"enabled": "True",

894

509

}

895

510

896

511

@staticmethod

897

512

def config_parser(config):

898

513

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

905

520

for client_name in config.sections():

906

521

section = dict(config.items(client_name))

907

522

client = settings[client_name] = {}

908

523

909

524

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

910

525

# Reformat values from string types to Python types

911

526

client["approved_by_default"] = config.getboolean(

912

527

client_name, "approved_by_default")

913

528

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

914

529

"enabled")

915

916

# Uppercase and remove spaces from key_id and fingerprint

917

# for later comparison purposes with return value from the

918

# key_id() and fingerprint() functions

919

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

920

.replace(" ", ""))

530

531

# Uppercase and remove spaces from fingerprint for later

532

# comparison purposes with return value from the

533

# fingerprint() function

921

534

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

922

535

.replace(" ", ""))

923

536

if "secret" in section:

924

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

925

.encode("utf-8"),

926

"base64")

537

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

927

538

elif "secfile" in section:

928

539

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

929

540

(section["secfile"])),

944

555

client["last_approval_request"] = None

945

556

client["last_checked_ok"] = None

946

557

client["last_checker_status"] = -2

947

558

948

559

return settings

949

950

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

560

561

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

951

562

self.name = name

952

563

if server_settings is None:

953

564

server_settings = {}

955

566

# adding all client settings

956

567

for setting, value in settings.items():

957

568

setattr(self, setting, value)

958

569

959

570

if self.enabled:

960

571

if not hasattr(self, "last_enabled"):

961

572

self.last_enabled = datetime.datetime.utcnow()

965

576

else:

966

577

self.last_enabled = None

967

578

self.expires = None

968

579

969

580

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

970

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

971

581

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

972

582

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

973

583

datetime.datetime.utcnow())

974

584

975

585

# attributes specific for this server instance

976

586

self.checker = None

977

587

self.checker_initiator_tag = None

983

593

self.changedstate = multiprocessing_manager.Condition(

984

594

multiprocessing_manager.Lock())

985

595

self.client_structure = [attr

986

for attr in self.__dict__.keys()

596

for attr in self.__dict__.iterkeys()

987

597

if not attr.startswith("_")]

988

598

self.client_structure.append("client_structure")

989

599

990

600

for name, t in inspect.getmembers(

991

601

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

992

602

if not name.startswith("_"):

993

603

self.client_structure.append(name)

994

604

995

605

# Send notice to process children that client state has changed

996

606

def send_changedstate(self):

997

607

with self.changedstate:

998

608

self.changedstate.notify_all()

999

609

1000

610

def enable(self):

1001

611

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

1002

612

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

1007

617

self.last_enabled = datetime.datetime.utcnow()

1008

618

self.init_checker()

1009

619

self.send_changedstate()

1010

620

1011

621

def disable(self, quiet=True):

1012

622

"""Disable this client."""

1013

623

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

1015

625

if not quiet:

1016

626

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

1017

627

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

1018

GLib.source_remove(self.disable_initiator_tag)

628

gobject.source_remove(self.disable_initiator_tag)

1019

629

self.disable_initiator_tag = None

1020

630

self.expires = None

1021

631

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

1022

GLib.source_remove(self.checker_initiator_tag)

632

gobject.source_remove(self.checker_initiator_tag)

1023

633

self.checker_initiator_tag = None

1024

634

self.stop_checker()

1025

635

self.enabled = False

1026

636

if not quiet:

1027

637

self.send_changedstate()

1028

# 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

1029

639

return False

1030

640

1031

641

def __del__(self):

1032

642

self.disable()

1033

643

1034

644

def init_checker(self):

1035

645

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

1036

646

# and every interval from then on.

1037

647

if self.checker_initiator_tag is not None:

1038

GLib.source_remove(self.checker_initiator_tag)

1039

self.checker_initiator_tag = GLib.timeout_add(

648

gobject.source_remove(self.checker_initiator_tag)

649

self.checker_initiator_tag = gobject.timeout_add(

1040

650

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

1041

651

self.start_checker)

1042

652

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

1043

653

if self.disable_initiator_tag is not None:

1044

GLib.source_remove(self.disable_initiator_tag)

1045

self.disable_initiator_tag = GLib.timeout_add(

654

gobject.source_remove(self.disable_initiator_tag)

655

self.disable_initiator_tag = gobject.timeout_add(

1046

656

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

1047

657

# Also start a new checker *right now*.

1048

658

self.start_checker()

1049

659

1050

660

def checker_callback(self, source, condition, connection,

1051

661

command):

1052

662

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

663

self.checker_callback_tag = None

664

self.checker = None

1053

665

# Read return code from connection (see call_pipe)

1054

666

returncode = connection.recv()

1055

667

connection.close()

1056

if self.checker is not None:

1057

self.checker.join()

1058

self.checker_callback_tag = None

1059

self.checker = None

1060

668

1061

669

if returncode >= 0:

1062

670

self.last_checker_status = returncode

1063

671

self.last_checker_signal = None

1073

681

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

1074

682

vars(self))

1075

683

return False

1076

684

1077

685

def checked_ok(self):

1078

686

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

1079

687

self.last_checked_ok = datetime.datetime.utcnow()

1080

688

self.last_checker_status = 0

1081

689

self.last_checker_signal = None

1082

690

self.bump_timeout()

1083

691

1084

692

def bump_timeout(self, timeout=None):

1085

693

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

1086

694

if timeout is None:

1087

695

timeout = self.timeout

1088

696

if self.disable_initiator_tag is not None:

1089

GLib.source_remove(self.disable_initiator_tag)

697

gobject.source_remove(self.disable_initiator_tag)

1090

698

self.disable_initiator_tag = None

1091

699

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

1092

self.disable_initiator_tag = GLib.timeout_add(

700

self.disable_initiator_tag = gobject.timeout_add(

1093

701

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

1094

702

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

1095

703

1096

704

def need_approval(self):

1097

705

self.last_approval_request = datetime.datetime.utcnow()

1098

706

1099

707

def start_checker(self):

1100

708

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

1101

709

1102

710

If a checker already exists, leave it running and do

1103

711

nothing."""

1104

712

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

1109

717

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

1110

718

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

1111

719

# should be.

1112

720

1113

721

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

1114

722

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

1115

723

self.checker.join()

1119

727

# Escape attributes for the shell

1120

728

escaped_attrs = {

1121

729

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

1122

for attr in self.runtime_expansions}

730

for attr in self.runtime_expansions }

1123

731

try:

1124

732

command = self.checker_command % escaped_attrs

1125

733

except TypeError as error:

1137

745

# The exception is when not debugging but nevertheless

1138

746

# running in the foreground; use the previously

1139

747

# created wnull.

1140

popen_args = {"close_fds": True,

1141

"shell": True,

1142

"cwd": "/"}

748

popen_args = { "close_fds": True,

749

"shell": True,

750

"cwd": "/" }

1143

751

if (not self.server_settings["debug"]

1144

752

and self.server_settings["foreground"]):

1145

753

popen_args.update({"stdout": wnull,

1146

"stderr": wnull})

1147

pipe = multiprocessing.Pipe(duplex=False)

754

"stderr": wnull })

755

pipe = multiprocessing.Pipe(duplex = False)

1148

756

self.checker = multiprocessing.Process(

1149

target=call_pipe,

1150

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

1151

kwargs=popen_args)

757

target = call_pipe,

758

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

759

kwargs = popen_args)

1152

760

self.checker.start()

1153

self.checker_callback_tag = GLib.io_add_watch(

1154

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

1155

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

761

self.checker_callback_tag = gobject.io_add_watch(

762

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

1156

763

self.checker_callback, pipe[0], command)

1157

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

764

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

1158

765

return True

1159

766

1160

767

def stop_checker(self):

1161

768

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

1162

769

if self.checker_callback_tag:

1163

GLib.source_remove(self.checker_callback_tag)

770

gobject.source_remove(self.checker_callback_tag)

1164

771

self.checker_callback_tag = None

1165

772

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

1166

773

return

1175

782

byte_arrays=False):

1176

783

"""Decorators for marking methods of a DBusObjectWithProperties to

1177

784

become properties on the D-Bus.

1178

785

1179

786

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

1180

787

and with one argument by "Set".

1181

788

1182

789

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

1183

790

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

1184

791

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

1188

795

if byte_arrays and signature != "ay":

1189

796

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

1190

797

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

1191

798

1192

799

def decorator(func):

1193

800

func._dbus_is_property = True

1194

801

func._dbus_interface = dbus_interface

1197

804

func._dbus_name = func.__name__

1198

805

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

1199

806

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

1200

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

807

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1201

808

return func

1202

809

1203

810

return decorator

1204

811

1205

812

1206

813

def dbus_interface_annotations(dbus_interface):

1207

814

"""Decorator for marking functions returning interface annotations

1208

815

1209

816

Usage:

1210

817

1211

818

@dbus_interface_annotations("org.example.Interface")

1212

819

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

1213

820

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

1214

821

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

1215

822

"false"}

1216

823

"""

1217

824

1218

825

def decorator(func):

1219

826

func._dbus_is_interface = True

1220

827

func._dbus_interface = dbus_interface

1221

828

func._dbus_name = dbus_interface

1222

829

return func

1223

830

1224

831

return decorator

1225

832

1226

833

1227

834

def dbus_annotations(annotations):

1228

835

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

1229

836

Usage:

1230

837

1231

838

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

1232

839

"org.freedesktop.DBus.Property."

1233

840

"EmitsChangedSignal": "false"})

1235

842

access="r")

1236

843

def Property_dbus_property(self):

1237

844

return dbus.Boolean(False)

1238

1239

See also the DBusObjectWithAnnotations class.

1240

845

"""

1241

846

1242

847

def decorator(func):

1243

848

func._dbus_annotations = annotations

1244

849

return func

1245

850

1246

851

return decorator

1247

852

1248

853

1264

869

pass

1265

870

1266

871

1267

class DBusObjectWithAnnotations(dbus.service.Object):

1268

"""A D-Bus object with annotations.

1269

1270

Classes inheriting from this can use the dbus_annotations

1271

decorator to add annotations to methods or signals.

872

class DBusObjectWithProperties(dbus.service.Object):

873

"""A D-Bus object with properties.

874

875

Classes inheriting from this can use the dbus_service_property

876

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

877

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

1272

878

"""

1273

879

1274

880

@staticmethod

1275

881

def _is_dbus_thing(thing):

1276

882

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

1277

883

1278

884

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

1279

885

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

1280

886

"""

1281

887

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

1282

888

False)

1283

889

1284

890

def _get_all_dbus_things(self, thing):

1285

891

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

1286

892

"""

1289

895

for cls in self.__class__.__mro__

1290

896

for name, athing in

1291

897

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

1292

1293

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1294

out_signature="s",

1295

path_keyword='object_path',

1296

connection_keyword='connection')

1297

def Introspect(self, object_path, connection):

1298

"""Overloading of standard D-Bus method.

1299

1300

Inserts annotation tags on methods and signals.

1301

"""

1302

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

1303

connection)

1304

try:

1305

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

1306

1307

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

1308

# Add annotation tags

1309

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

1310

for tag in if_tag.getElementsByTagName(typ):

1311

annots = dict()

1312

for name, prop in (self.

1313

_get_all_dbus_things(typ)):

1314

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

1315

and prop._dbus_interface

1316

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

1317

annots.update(getattr(

1318

prop, "_dbus_annotations", {}))

1319

for name, value in annots.items():

1320

ann_tag = document.createElement(

1321

"annotation")

1322

ann_tag.setAttribute("name", name)

1323

ann_tag.setAttribute("value", value)

1324

tag.appendChild(ann_tag)

1325

# Add interface annotation tags

1326

for annotation, value in dict(

1327

itertools.chain.from_iterable(

1328

annotations().items()

1329

for name, annotations

1330

in self._get_all_dbus_things("interface")

1331

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

1332

)).items():

1333

ann_tag = document.createElement("annotation")

1334

ann_tag.setAttribute("name", annotation)

1335

ann_tag.setAttribute("value", value)

1336

if_tag.appendChild(ann_tag)

1337

# Fix argument name for the Introspect method itself

1338

if (if_tag.getAttribute("name")

1339

== dbus.INTROSPECTABLE_IFACE):

1340

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

1341

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

1342

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

1343

if (arg.getAttribute("direction")

1344

== "out"):

1345

arg.setAttribute("name",

1346

"xml_data")

1347

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

1348

document.unlink()

1349

except (AttributeError, xml.dom.DOMException,

1350

xml.parsers.expat.ExpatError) as error:

1351

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

1352

exc_info=error)

1353

return xmlstring

1354

1355

1356

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1357

"""A D-Bus object with properties.

1358

1359

Classes inheriting from this can use the dbus_service_property

1360

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

1361

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

1362

"""

1363

898

1364

899

def _get_dbus_property(self, interface_name, property_name):

1365

900

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

1366

901

property with the specified name and interface.

1371

906

if (value._dbus_name == property_name

1372

907

and value._dbus_interface == interface_name):

1373

908

return value.__get__(self)

1374

909

1375

910

# No such property

1376

911

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

1377

912

self.dbus_object_path, interface_name, property_name))

1378

1379

@classmethod

1380

def _get_all_interface_names(cls):

1381

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

1382

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

1383

"_dbus_interface", None)

1384

for x in (inspect.getmro(cls))

1385

for attr in dir(x))

1386

if name is not None)

1387

913

1388

914

@dbus.service.method(dbus.PROPERTIES_IFACE,

1389

915

in_signature="ss",

1390

916

out_signature="v")

1398

924

if not hasattr(value, "variant_level"):

1399

925

return value

1400

926

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

1401

927

1402

928

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

1403

929

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

1404

930

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

1416

942

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

1417

943

for byte in value))

1418

944

prop(value)

1419

945

1420

946

@dbus.service.method(dbus.PROPERTIES_IFACE,

1421

947

in_signature="s",

1422

948

out_signature="a{sv}")

1423

949

def GetAll(self, interface_name):

1424

950

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

1425

951

standard.

1426

952

1427

953

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

1428

954

"""

1429

955

properties = {}

1440

966

properties[name] = value

1441

967

continue

1442

968

properties[name] = type(value)(

1443

value, variant_level=value.variant_level + 1)

969

value, variant_level = value.variant_level + 1)

1444

970

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

1445

971

1446

972

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

1447

973

def PropertiesChanged(self, interface_name, changed_properties,

1448

974

invalidated_properties):

1450

976

standard.

1451

977

"""

1452

978

pass

1453

979

1454

980

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1455

981

out_signature="s",

1456

982

path_keyword='object_path',

1457

983

connection_keyword='connection')

1458

984

def Introspect(self, object_path, connection):

1459

985

"""Overloading of standard D-Bus method.

1460

986

1461

987

Inserts property tags and interface annotation tags.

1462

988

"""

1463

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1464

object_path,

1465

connection)

989

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

990

connection)

1466

991

try:

1467

992

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

1468

993

1469

994

def make_tag(document, name, prop):

1470

995

e = document.createElement("property")

1471

996

e.setAttribute("name", name)

1472

997

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

1473

998

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

1474

999

return e

1475

1000

1476

1001

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

1477

1002

# Add property tags

1478

1003

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

1481

1006

if prop._dbus_interface

1482

1007

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

1483

1008

if_tag.appendChild(tag)

1484

# Add annotation tags for properties

1485

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

1486

annots = dict()

1487

for name, prop in self._get_all_dbus_things(

1488

"property"):

1489

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

1490

and prop._dbus_interface

1491

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

1492

annots.update(getattr(

1493

prop, "_dbus_annotations", {}))

1494

for name, value in annots.items():

1495

ann_tag = document.createElement(

1496

"annotation")

1497

ann_tag.setAttribute("name", name)

1498

ann_tag.setAttribute("value", value)

1499

tag.appendChild(ann_tag)

1009

# Add annotation tags

1010

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

1011

for tag in if_tag.getElementsByTagName(typ):

1012

annots = dict()

1013

for name, prop in (self.

1014

_get_all_dbus_things(typ)):

1015

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

1016

and prop._dbus_interface

1017

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

1018

annots.update(getattr(

1019

prop, "_dbus_annotations", {}))

1020

for name, value in annots.items():

1021

ann_tag = document.createElement(

1022

"annotation")

1023

ann_tag.setAttribute("name", name)

1024

ann_tag.setAttribute("value", value)

1025

tag.appendChild(ann_tag)

1026

# Add interface annotation tags

1027

for annotation, value in dict(

1028

itertools.chain.from_iterable(

1029

annotations().items()

1030

for name, annotations

1031

in self._get_all_dbus_things("interface")

1032

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

1033

)).items():

1034

ann_tag = document.createElement("annotation")

1035

ann_tag.setAttribute("name", annotation)

1036

ann_tag.setAttribute("value", value)

1037

if_tag.appendChild(ann_tag)

1500

1038

# Add the names to the return values for the

1501

1039

# "org.freedesktop.DBus.Properties" methods

1502

1040

if (if_tag.getAttribute("name")

1521

1059

return xmlstring

1522

1060

1523

1061

1524

try:

1525

dbus.OBJECT_MANAGER_IFACE

1526

except AttributeError:

1527

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

1528

1529

1530

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1531

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

1532

1533

Classes inheriting from this exposes the standard

1534

GetManagedObjects call and the InterfacesAdded and

1535

InterfacesRemoved signals on the standard

1536

"org.freedesktop.DBus.ObjectManager" interface.

1537

1538

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

1539

manually.

1540

"""

1541

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1542

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

1543

def GetManagedObjects(self):

1544

"""This function must be overridden"""

1545

raise NotImplementedError()

1546

1547

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1548

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

1549

def InterfacesAdded(self, object_path, interfaces_and_properties):

1550

pass

1551

1552

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

1553

def InterfacesRemoved(self, object_path, interfaces):

1554

pass

1555

1556

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1557

out_signature="s",

1558

path_keyword='object_path',

1559

connection_keyword='connection')

1560

def Introspect(self, object_path, connection):

1561

"""Overloading of standard D-Bus method.

1562

1563

Override return argument name of GetManagedObjects to be

1564

"objpath_interfaces_and_properties"

1565

"""

1566

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1567

object_path,

1568

connection)

1569

try:

1570

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

1571

1572

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

1573

# Fix argument name for the GetManagedObjects method

1574

if (if_tag.getAttribute("name")

1575

== dbus.OBJECT_MANAGER_IFACE):

1576

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

1577

if (cn.getAttribute("name")

1578

== "GetManagedObjects"):

1579

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

1580

if (arg.getAttribute("direction")

1581

== "out"):

1582

arg.setAttribute(

1583

"name",

1584

"objpath_interfaces"

1585

"_and_properties")

1586

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

1587

document.unlink()

1588

except (AttributeError, xml.dom.DOMException,

1589

xml.parsers.expat.ExpatError) as error:

1590

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

1591

exc_info=error)

1592

return xmlstring

1593

1594

1595

1062

def datetime_to_dbus(dt, variant_level=0):

1596

1063

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

1597

1064

if dt is None:

1598

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

1065

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

1599

1066

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

1600

1067

1601

1068

1604

1071

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

1605

1072

interface names according to the "alt_interface_names" mapping.

1606

1073

Usage:

1607

1074

1608

1075

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

1609

1076

"net.example.AlternateInterface"})

1610

1077

class SampleDBusObject(dbus.service.Object):

1611

1078

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

1612

1079

def SampleDBusMethod():

1613

1080

pass

1614

1081

1615

1082

The above "SampleDBusMethod" on "SampleDBusObject" will be

1616

1083

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

1617

1084

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

1618

1085

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

1619

1086

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

1620

1087

1621

1088

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

1622

1089

(from DBusObjectWithProperties) and interfaces (from the

1623

1090

dbus_interface_annotations decorator).

1624

1091

"""

1625

1092

1626

1093

def wrapper(cls):

1627

1094

for orig_interface_name, alt_interface_name in (

1628

1095

alt_interface_names.items()):

1643

1110

interface_names.add(alt_interface)

1644

1111

# Is this a D-Bus signal?

1645

1112

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

1646

# Extract the original non-method undecorated

1647

# function by black magic

1648

1113

if sys.version_info.major == 2:

1114

# Extract the original non-method undecorated

1115

# function by black magic

1649

1116

nonmethod_func = (dict(

1650

1117

zip(attribute.func_code.co_freevars,

1651

1118

attribute.__closure__))

1652

1119

["func"].cell_contents)

1653

1120

else:

1654

nonmethod_func = (dict(

1655

zip(attribute.__code__.co_freevars,

1656

attribute.__closure__))

1657

["func"].cell_contents)

1121

nonmethod_func = attribute

1658

1122

# Create a new, but exactly alike, function

1659

1123

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

1660

1124

# with the alternate D-Bus interface name

1661

new_function = copy_function(nonmethod_func)

1125

if sys.version_info.major == 2:

1126

new_function = types.FunctionType(

1127

nonmethod_func.func_code,

1128

nonmethod_func.func_globals,

1129

nonmethod_func.func_name,

1130

nonmethod_func.func_defaults,

1131

nonmethod_func.func_closure)

1132

else:

1133

new_function = types.FunctionType(

1134

nonmethod_func.__code__,

1135

nonmethod_func.__globals__,

1136

nonmethod_func.__name__,

1137

nonmethod_func.__defaults__,

1138

nonmethod_func.__closure__)

1662

1139

new_function = (dbus.service.signal(

1663

1140

alt_interface,

1664

1141

attribute._dbus_signature)(new_function))

1668

1145

attribute._dbus_annotations)

1669

1146

except AttributeError:

1670

1147

pass

1671

1672

1148

# Define a creator of a function to call both the

1673

1149

# original and alternate functions, so both the

1674

1150

# original and alternate signals gets sent when

1677

1153

"""This function is a scope container to pass

1678

1154

func1 and func2 to the "call_both" function

1679

1155

outside of its arguments"""

1680

1681

@functools.wraps(func2)

1156

1682

1157

def call_both(*args, **kwargs):

1683

1158

"""This function will emit two D-Bus

1684

1159

signals by calling func1 and func2"""

1685

1160

func1(*args, **kwargs)

1686

1161

func2(*args, **kwargs)

1687

# Make wrapper function look like a D-Bus

1688

# signal

1689

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

1690

if name.startswith("_dbus_"):

1691

setattr(call_both, name, attr)

1692

1162

1693

1163

return call_both

1694

1164

# Create the "call_both" function and add it to

1695

1165

# the class

1705

1175

alt_interface,

1706

1176

attribute._dbus_in_signature,

1707

1177

attribute._dbus_out_signature)

1708

(copy_function(attribute)))

1178

(types.FunctionType(attribute.func_code,

1179

attribute.func_globals,

1180

attribute.func_name,

1181

attribute.func_defaults,

1182

attribute.func_closure)))

1709

1183

# Copy annotations, if any

1710

1184

try:

1711

1185

attr[attrname]._dbus_annotations = dict(

1723

1197

attribute._dbus_access,

1724

1198

attribute._dbus_get_args_options

1725

1199

["byte_arrays"])

1726

(copy_function(attribute)))

1200

(types.FunctionType(

1201

attribute.func_code,

1202

attribute.func_globals,

1203

attribute.func_name,

1204

attribute.func_defaults,

1205

attribute.func_closure)))

1727

1206

# Copy annotations, if any

1728

1207

try:

1729

1208

attr[attrname]._dbus_annotations = dict(

1738

1217

# to the class.

1739

1218

attr[attrname] = (

1740

1219

dbus_interface_annotations(alt_interface)

1741

(copy_function(attribute)))

1220

(types.FunctionType(attribute.func_code,

1221

attribute.func_globals,

1222

attribute.func_name,

1223

attribute.func_defaults,

1224

attribute.func_closure)))

1742

1225

if deprecate:

1743

1226

# Deprecate all alternate interfaces

1744

iname = "_AlternateDBusNames_interface_annotation{}"

1227

iname="_AlternateDBusNames_interface_annotation{}"

1745

1228

for interface_name in interface_names:

1746

1229

1747

1230

@dbus_interface_annotations(interface_name)

1748

1231

def func(self):

1749

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

1750

"true"}

1232

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

1233

"true" }

1751

1234

# Find an unused name

1752

1235

for aname in (iname.format(i)

1753

1236

for i in itertools.count()):

1757

1240

if interface_names:

1758

1241

# Replace the class with a new subclass of it with

1759

1242

# methods, signals, etc. as created above.

1760

if sys.version_info.major == 2:

1761

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

1762

(cls, ), attr)

1763

else:

1764

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

1765

(cls, ), attr)

1243

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

1244

(cls, ), attr)

1766

1245

return cls

1767

1246

1768

1247

return wrapper

1769

1248

1770

1249

1772

1251

"se.bsnet.fukt.Mandos"})

1773

1252

class ClientDBus(Client, DBusObjectWithProperties):

1774

1253

"""A Client class using D-Bus

1775

1254

1776

1255

Attributes:

1777

1256

dbus_object_path: dbus.ObjectPath

1778

1257

bus: dbus.SystemBus()

1779

1258

"""

1780

1259

1781

1260

runtime_expansions = (Client.runtime_expansions

1782

1261

+ ("dbus_object_path", ))

1783

1262

1784

1263

_interface = "se.recompile.Mandos.Client"

1785

1264

1786

1265

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

1787

1788

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

1266

1267

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

1789

1268

self.bus = bus

1790

1269

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

1791

1270

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

1797

1276

"/clients/" + client_object_name)

1798

1277

DBusObjectWithProperties.__init__(self, self.bus,

1799

1278

self.dbus_object_path)

1800

1279

1801

1280

def notifychangeproperty(transform_func, dbus_name,

1802

1281

type_func=lambda x: x,

1803

1282

variant_level=1,

1805

1284

_interface=_interface):

1806

1285

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

1807

1286

its changes to DBus.

1808

1287

1809

1288

transform_fun: Function that takes a value and a variant_level

1810

1289

and transforms it to a D-Bus type.

1811

1290

dbus_name: D-Bus name of the variable

1814

1293

variant_level: D-Bus variant level. Default: 1

1815

1294

"""

1816

1295

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

1817

1296

1818

1297

def setter(self, value):

1819

1298

if hasattr(self, "dbus_object_path"):

1820

1299

if (not hasattr(self, attrname) or

1827

1306

else:

1828

1307

dbus_value = transform_func(

1829

1308

type_func(value),

1830

variant_level=variant_level)

1309

variant_level = variant_level)

1831

1310

self.PropertyChanged(dbus.String(dbus_name),

1832

1311

dbus_value)

1833

1312

self.PropertiesChanged(

1834

1313

_interface,

1835

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

1836

dbus_value}),

1314

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

1315

dbus_value }),

1837

1316

dbus.Array())

1838

1317

setattr(self, attrname, value)

1839

1318

1840

1319

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

1841

1320

1842

1321

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1843

1322

approvals_pending = notifychangeproperty(dbus.Boolean,

1844

1323

"ApprovalPending",

1845

type_func=bool)

1324

type_func = bool)

1846

1325

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

1847

1326

last_enabled = notifychangeproperty(datetime_to_dbus,

1848

1327

"LastEnabled")

1849

1328

checker = notifychangeproperty(

1850

1329

dbus.Boolean, "CheckerRunning",

1851

type_func=lambda checker: checker is not None)

1330

type_func = lambda checker: checker is not None)

1852

1331

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1853

1332

"LastCheckedOK")

1854

1333

last_checker_status = notifychangeproperty(dbus.Int16,

1859

1338

"ApprovedByDefault")

1860

1339

approval_delay = notifychangeproperty(

1861

1340

dbus.UInt64, "ApprovalDelay",

1862

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

1341

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

1863

1342

approval_duration = notifychangeproperty(

1864

1343

dbus.UInt64, "ApprovalDuration",

1865

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

1344

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

1866

1345

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

1867

1346

timeout = notifychangeproperty(

1868

1347

dbus.UInt64, "Timeout",

1869

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

1348

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

1870

1349

extended_timeout = notifychangeproperty(

1871

1350

dbus.UInt64, "ExtendedTimeout",

1872

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

1351

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

1873

1352

interval = notifychangeproperty(

1874

1353

dbus.UInt64, "Interval",

1875

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

1354

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

1876

1355

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

1877

1356

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

1878

1357

invalidate_only=True)

1879

1358

1880

1359

del notifychangeproperty

1881

1360

1882

1361

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

1883

1362

try:

1884

1363

self.remove_from_connection()

1887

1366

if hasattr(DBusObjectWithProperties, "__del__"):

1888

1367

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

1889

1368

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

1890

1369

1891

1370

def checker_callback(self, source, condition,

1892

1371

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

1893

1372

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

1897

1376

if exitstatus >= 0:

1898

1377

# Emit D-Bus signal

1899

1378

self.CheckerCompleted(dbus.Int16(exitstatus),

1900

# This is specific to GNU libC

1901

dbus.Int64(exitstatus << 8),

1379

dbus.Int64(0),

1902

1380

dbus.String(command))

1903

1381

else:

1904

1382

# Emit D-Bus signal

1905

1383

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

1906

1384

dbus.Int64(

1907

# This is specific to GNU libC

1908

(exitstatus << 8)

1909

| self.last_checker_signal),

1385

self.last_checker_signal),

1910

1386

dbus.String(command))

1911

1387

return ret

1912

1388

1913

1389

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

1914

1390

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

1915

1391

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

1919

1395

# Emit D-Bus signal

1920

1396

self.CheckerStarted(self.current_checker_command)

1921

1397

return r

1922

1398

1923

1399

def _reset_approved(self):

1924

1400

self.approved = None

1925

1401

return False

1926

1402

1927

1403

def approve(self, value=True):

1928

1404

self.approved = value

1929

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

1930

* 1000), self._reset_approved)

1405

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

1406

* 1000), self._reset_approved)

1931

1407

self.send_changedstate()

1932

1933

# D-Bus methods, signals & properties

1934

1935

# Interfaces

1936

1937

# Signals

1938

1408

1409

## D-Bus methods, signals & properties

1410

1411

## Interfaces

1412

1413

## Signals

1414

1939

1415

# CheckerCompleted - signal

1940

1416

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

1941

1417

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

1942

1418

"D-Bus signal"

1943

1419

pass

1944

1420

1945

1421

# CheckerStarted - signal

1946

1422

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

1947

1423

def CheckerStarted(self, command):

1948

1424

"D-Bus signal"

1949

1425

pass

1950

1426

1951

1427

# PropertyChanged - signal

1952

1428

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

1953

1429

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

1954

1430

def PropertyChanged(self, property, value):

1955

1431

"D-Bus signal"

1956

1432

pass

1957

1433

1958

1434

# GotSecret - signal

1959

1435

@dbus.service.signal(_interface)

1960

1436

def GotSecret(self):

1963

1439

server to mandos-client

1964

1440

"""

1965

1441

pass

1966

1442

1967

1443

# Rejected - signal

1968

1444

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

1969

1445

def Rejected(self, reason):

1970

1446

"D-Bus signal"

1971

1447

pass

1972

1448

1973

1449

# NeedApproval - signal

1974

1450

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

1975

1451

def NeedApproval(self, timeout, default):

1976

1452

"D-Bus signal"

1977

1453

return self.need_approval()

1978

1979

# Methods

1980

1454

1455

## Methods

1456

1981

1457

# Approve - method

1982

1458

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

1983

1459

def Approve(self, value):

1984

1460

self.approve(value)

1985

1461

1986

1462

# CheckedOK - method

1987

1463

@dbus.service.method(_interface)

1988

1464

def CheckedOK(self):

1989

1465

self.checked_ok()

1990

1466

1991

1467

# Enable - method

1992

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

1993

1468

@dbus.service.method(_interface)

1994

1469

def Enable(self):

1995

1470

"D-Bus method"

1996

1471

self.enable()

1997

1472

1998

1473

# StartChecker - method

1999

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

2000

1474

@dbus.service.method(_interface)

2001

1475

def StartChecker(self):

2002

1476

"D-Bus method"

2003

1477

self.start_checker()

2004

1478

2005

1479

# Disable - method

2006

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

2007

1480

@dbus.service.method(_interface)

2008

1481

def Disable(self):

2009

1482

"D-Bus method"

2010

1483

self.disable()

2011

1484

2012

1485

# StopChecker - method

2013

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

2014

1486

@dbus.service.method(_interface)

2015

1487

def StopChecker(self):

2016

1488

self.stop_checker()

2017

2018

# Properties

2019

1489

1490

## Properties

1491

2020

1492

# ApprovalPending - property

2021

1493

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

2022

1494

def ApprovalPending_dbus_property(self):

2023

1495

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

2024

1496

2025

1497

# ApprovedByDefault - property

2026

1498

@dbus_service_property(_interface,

2027

1499

signature="b",

2030

1502

if value is None: # get

2031

1503

return dbus.Boolean(self.approved_by_default)

2032

1504

self.approved_by_default = bool(value)

2033

1505

2034

1506

# ApprovalDelay - property

2035

1507

@dbus_service_property(_interface,

2036

1508

signature="t",

2040

1512

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

2041

1513

* 1000)

2042

1514

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

2043

1515

2044

1516

# ApprovalDuration - property

2045

1517

@dbus_service_property(_interface,

2046

1518

signature="t",

2050

1522

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

2051

1523

* 1000)

2052

1524

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

2053

1525

2054

1526

# Name - property

2055

1527

@dbus_annotations(

2056

1528

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

2057

1529

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

2058

1530

def Name_dbus_property(self):

2059

1531

return dbus.String(self.name)

2060

2061

# KeyID - property

2062

@dbus_annotations(

2063

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

2064

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

2065

def KeyID_dbus_property(self):

2066

return dbus.String(self.key_id)

2067

1532

2068

1533

# Fingerprint - property

2069

1534

@dbus_annotations(

2070

1535

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

2071

1536

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

2072

1537

def Fingerprint_dbus_property(self):

2073

1538

return dbus.String(self.fingerprint)

2074

1539

2075

1540

# Host - property

2076

1541

@dbus_service_property(_interface,

2077

1542

signature="s",

2080

1545

if value is None: # get

2081

1546

return dbus.String(self.host)

2082

1547

self.host = str(value)

2083

1548

2084

1549

# Created - property

2085

1550

@dbus_annotations(

2086

1551

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

2087

1552

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

2088

1553

def Created_dbus_property(self):

2089

1554

return datetime_to_dbus(self.created)

2090

1555

2091

1556

# LastEnabled - property

2092

1557

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

2093

1558

def LastEnabled_dbus_property(self):

2094

1559

return datetime_to_dbus(self.last_enabled)

2095

1560

2096

1561

# Enabled - property

2097

1562

@dbus_service_property(_interface,

2098

1563

signature="b",

2104

1569

self.enable()

2105

1570

else:

2106

1571

self.disable()

2107

1572

2108

1573

# LastCheckedOK - property

2109

1574

@dbus_service_property(_interface,

2110

1575

signature="s",

2114

1579

self.checked_ok()

2115

1580

return

2116

1581

return datetime_to_dbus(self.last_checked_ok)

2117

1582

2118

1583

# LastCheckerStatus - property

2119

1584

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

2120

1585

def LastCheckerStatus_dbus_property(self):

2121

1586

return dbus.Int16(self.last_checker_status)

2122

1587

2123

1588

# Expires - property

2124

1589

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

2125

1590

def Expires_dbus_property(self):

2126

1591

return datetime_to_dbus(self.expires)

2127

1592

2128

1593

# LastApprovalRequest - property

2129

1594

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

2130

1595

def LastApprovalRequest_dbus_property(self):

2131

1596

return datetime_to_dbus(self.last_approval_request)

2132

1597

2133

1598

# Timeout - property

2134

1599

@dbus_service_property(_interface,

2135

1600

signature="t",

2150

1615

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

2151

1616

is None):

2152

1617

return

2153

GLib.source_remove(self.disable_initiator_tag)

2154

self.disable_initiator_tag = GLib.timeout_add(

1618

gobject.source_remove(self.disable_initiator_tag)

1619

self.disable_initiator_tag = gobject.timeout_add(

2155

1620

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

2156

1621

self.disable)

2157

1622

2158

1623

# ExtendedTimeout - property

2159

1624

@dbus_service_property(_interface,

2160

1625

signature="t",

2164

1629

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

2165

1630

* 1000)

2166

1631

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

2167

1632

2168

1633

# Interval - property

2169

1634

@dbus_service_property(_interface,

2170

1635

signature="t",

2177

1642

return

2178

1643

if self.enabled:

2179

1644

# Reschedule checker run

2180

GLib.source_remove(self.checker_initiator_tag)

2181

self.checker_initiator_tag = GLib.timeout_add(

1645

gobject.source_remove(self.checker_initiator_tag)

1646

self.checker_initiator_tag = gobject.timeout_add(

2182

1647

value, self.start_checker)

2183

self.start_checker() # Start one now, too

2184

1648

self.start_checker() # Start one now, too

1649

2185

1650

# Checker - property

2186

1651

@dbus_service_property(_interface,

2187

1652

signature="s",

2190

1655

if value is None: # get

2191

1656

return dbus.String(self.checker_command)

2192

1657

self.checker_command = str(value)

2193

1658

2194

1659

# CheckerRunning - property

2195

1660

@dbus_service_property(_interface,

2196

1661

signature="b",

2202

1667

self.start_checker()

2203

1668

else:

2204

1669

self.stop_checker()

2205

1670

2206

1671

# ObjectPath - property

2207

1672

@dbus_annotations(

2208

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

2209

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

1673

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

2210

1674

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

2211

1675

def ObjectPath_dbus_property(self):

2212

return self.dbus_object_path # is already a dbus.ObjectPath

2213

1676

return self.dbus_object_path # is already a dbus.ObjectPath

1677

2214

1678

# Secret = property

2215

1679

@dbus_annotations(

2216

1680

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

2221

1685

byte_arrays=True)

2222

1686

def Secret_dbus_property(self, value):

2223

1687

self.secret = bytes(value)

2224

1688

2225

1689

del _interface

2226

1690

2227

1691

2228

class ProxyClient:

2229

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

1692

class ProxyClient(object):

1693

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

2230

1694

self._pipe = child_pipe

2231

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

1695

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

2232

1696

if not self._pipe.recv():

2233

raise KeyError(key_id or fpr)

2234

1697

raise KeyError(fpr)

1698

2235

1699

def __getattribute__(self, name):

2236

1700

if name == '_pipe':

2237

1701

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

2240

1704

if data[0] == 'data':

2241

1705

return data[1]

2242

1706

if data[0] == 'function':

2243

1707

2244

1708

def func(*args, **kwargs):

2245

1709

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

2246

1710

return self._pipe.recv()[1]

2247

1711

2248

1712

return func

2249

1713

2250

1714

def __setattr__(self, name, value):

2251

1715

if name == '_pipe':

2252

1716

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

2255

1719

2256

1720

class ClientHandler(socketserver.BaseRequestHandler, object):

2257

1721

"""A class to handle client connections.

2258

1722

2259

1723

Instantiated once for each connection to handle it.

2260

1724

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

2261

1725

2262

1726

def handle(self):

2263

1727

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

2264

1728

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

2265

1729

str(self.client_address))

2266

1730

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

2267

1731

self.server.child_pipe.fileno())

2268

2269

session = gnutls.ClientSession(self.request)

2270

2271

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

2272

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

2273

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

2274

# "+DHE-DSS"))

1732

1733

session = gnutls.connection.ClientSession(

1734

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

1735

1736

# Note: gnutls.connection.X509Credentials is really a

1737

# generic GnuTLS certificate credentials object so long as

1738

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

1739

# here despite using OpenPGP certificates.

1740

1741

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

1742

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

1743

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

1744

# "+DHE-DSS"))

2275

1745

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

2276

1746

priority = self.server.gnutls_priority

2277

1747

if priority is None:

2278

1748

priority = "NORMAL"

2279

gnutls.priority_set_direct(session._c_object,

2280

priority.encode("utf-8"),

2281

None)

2282

1749

gnutls.library.functions.gnutls_priority_set_direct(

1750

session._c_object, priority, None)

1751

2283

1752

# Start communication using the Mandos protocol

2284

1753

# Get protocol number

2285

1754

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

2290

1759

except (ValueError, IndexError, RuntimeError) as error:

2291

1760

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

2292

1761

return

2293

1762

2294

1763

# Start GnuTLS connection

2295

1764

try:

2296

1765

session.handshake()

2297

except gnutls.Error as error:

1766

except gnutls.errors.GNUTLSError as error:

2298

1767

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

2299

1768

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

2300

1769

# established. Just abandon the request.

2301

1770

return

2302

1771

logger.debug("Handshake succeeded")

2303

1772

2304

1773

approval_required = False

2305

1774

try:

2306

if gnutls.has_rawpk:

2307

fpr = b""

2308

try:

2309

key_id = self.key_id(

2310

self.peer_certificate(session))

2311

except (TypeError, gnutls.Error) as error:

2312

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

2313

return

2314

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

2315

2316

else:

2317

key_id = b""

2318

try:

2319

fpr = self.fingerprint(

2320

self.peer_certificate(session))

2321

except (TypeError, gnutls.Error) as error:

2322

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

2323

return

2324

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

2325

2326

try:

2327

client = ProxyClient(child_pipe, key_id, fpr,

1775

try:

1776

fpr = self.fingerprint(

1777

self.peer_certificate(session))

1778

except (TypeError,

1779

gnutls.errors.GNUTLSError) as error:

1780

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

1781

return

1782

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

1783

1784

try:

1785

client = ProxyClient(child_pipe, fpr,

2328

1786

self.client_address)

2329

1787

except KeyError:

2330

1788

return

2331

1789

2332

1790

if client.approval_delay:

2333

1791

delay = client.approval_delay

2334

1792

client.approvals_pending += 1

2335

1793

approval_required = True

2336

1794

2337

1795

while True:

2338

1796

if not client.enabled:

2339

1797

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

2342

1800

# Emit D-Bus signal

2343

1801

client.Rejected("Disabled")

2344

1802

return

2345

1803

2346

1804

if client.approved or not client.approval_delay:

2347

# We are approved or approval is disabled

1805

#We are approved or approval is disabled

2348

1806

break

2349

1807

elif client.approved is None:

2350

1808

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

2361

1819

# Emit D-Bus signal

2362

1820

client.Rejected("Denied")

2363

1821

return

2364

2365

# wait until timeout or approved

1822

1823

#wait until timeout or approved

2366

1824

time = datetime.datetime.now()

2367

1825

client.changedstate.acquire()

2368

1826

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

2381

1839

break

2382

1840

else:

2383

1841

delay -= time2 - time

2384

2385

try:

2386

session.send(client.secret)

2387

except gnutls.Error as error:

2388

logger.warning("gnutls send failed",

2389

exc_info=error)

2390

return

2391

1842

1843

sent_size = 0

1844

while sent_size < len(client.secret):

1845

try:

1846

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

1847

except gnutls.errors.GNUTLSError as error:

1848

logger.warning("gnutls send failed",

1849

exc_info=error)

1850

return

1851

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

1852

len(client.secret) - (sent_size

1853

+ sent))

1854

sent_size += sent

1855

2392

1856

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

2393

1857

# bump the timeout using extended_timeout

2394

1858

client.bump_timeout(client.extended_timeout)

2395

1859

if self.server.use_dbus:

2396

1860

# Emit D-Bus signal

2397

1861

client.GotSecret()

2398

1862

2399

1863

finally:

2400

1864

if approval_required:

2401

1865

client.approvals_pending -= 1

2402

1866

try:

2403

1867

session.bye()

2404

except gnutls.Error as error:

1868

except gnutls.errors.GNUTLSError as error:

2405

1869

logger.warning("GnuTLS bye failed",

2406

1870

exc_info=error)

2407

1871

2408

1872

@staticmethod

2409

1873

def peer_certificate(session):

2410

"Return the peer's certificate as a bytestring"

2411

try:

2412

cert_type = gnutls.certificate_type_get2(session._c_object,

2413

gnutls.CTYPE_PEERS)

2414

except AttributeError:

2415

cert_type = gnutls.certificate_type_get(session._c_object)

2416

if gnutls.has_rawpk:

2417

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2418

else:

2419

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2420

# If not a valid certificate type...

2421

if cert_type not in valid_cert_types:

2422

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

2423

valid_cert_types)

2424

# ...return invalid data

2425

return b""

1874

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

1875

# If not an OpenPGP certificate...

1876

if (gnutls.library.functions.gnutls_certificate_type_get(

1877

session._c_object)

1878

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1879

# ...do the normal thing

1880

return session.peer_certificate

2426

1881

list_size = ctypes.c_uint(1)

2427

cert_list = (gnutls.certificate_get_peers

1882

cert_list = (gnutls.library.functions

1883

.gnutls_certificate_get_peers

2428

1884

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

2429

1885

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

2430

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

1886

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

1887

" certificate")

2431

1888

if list_size.value == 0:

2432

1889

return None

2433

1890

cert = cert_list[0]

2434

1891

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

2435

2436

@staticmethod

2437

def key_id(certificate):

2438

"Convert a certificate bytestring to a hexdigit key ID"

2439

# New GnuTLS "datum" with the public key

2440

datum = gnutls.datum_t(

2441

ctypes.cast(ctypes.c_char_p(certificate),

2442

ctypes.POINTER(ctypes.c_ubyte)),

2443

ctypes.c_uint(len(certificate)))

2444

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

2445

# New empty GnuTLS certificate

2446

pubkey = gnutls.pubkey_t()

2447

gnutls.pubkey_init(ctypes.byref(pubkey))

2448

# Import the raw public key into the certificate

2449

gnutls.pubkey_import(pubkey,

2450

ctypes.byref(datum),

2451

gnutls.X509_FMT_DER)

2452

# New buffer for the key ID

2453

buf = ctypes.create_string_buffer(32)

2454

buf_len = ctypes.c_size_t(len(buf))

2455

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

2456

gnutls.pubkey_get_key_id(pubkey,

2457

gnutls.KEYID_USE_SHA256,

2458

ctypes.cast(ctypes.byref(buf),

2459

ctypes.POINTER(ctypes.c_ubyte)),

2460

ctypes.byref(buf_len))

2461

# Deinit the certificate

2462

gnutls.pubkey_deinit(pubkey)

2463

2464

# Convert the buffer to a Python bytestring

2465

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

2466

# Convert the bytestring to hexadecimal notation

2467

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

2468

return hex_key_id

2469

1892

2470

1893

@staticmethod

2471

1894

def fingerprint(openpgp):

2472

1895

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2473

1896

# New GnuTLS "datum" with the OpenPGP public key

2474

datum = gnutls.datum_t(

1897

datum = gnutls.library.types.gnutls_datum_t(

2475

1898

ctypes.cast(ctypes.c_char_p(openpgp),

2476

1899

ctypes.POINTER(ctypes.c_ubyte)),

2477

1900

ctypes.c_uint(len(openpgp)))

2478

1901

# New empty GnuTLS certificate

2479

crt = gnutls.openpgp_crt_t()

2480

gnutls.openpgp_crt_init(ctypes.byref(crt))

1902

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1903

gnutls.library.functions.gnutls_openpgp_crt_init(

1904

ctypes.byref(crt))

2481

1905

# Import the OpenPGP public key into the certificate

2482

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

2483

gnutls.OPENPGP_FMT_RAW)

1906

gnutls.library.functions.gnutls_openpgp_crt_import(

1907

crt, ctypes.byref(datum),

1908

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

2484

1909

# Verify the self signature in the key

2485

1910

crtverify = ctypes.c_uint()

2486

gnutls.openpgp_crt_verify_self(crt, 0,

2487

ctypes.byref(crtverify))

1911

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1912

crt, 0, ctypes.byref(crtverify))

2488

1913

if crtverify.value != 0:

2489

gnutls.openpgp_crt_deinit(crt)

2490

raise gnutls.CertificateSecurityError(code

2491

=crtverify.value)

1914

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1915

raise gnutls.errors.CertificateSecurityError(

1916

"Verify failed")

2492

1917

# New buffer for the fingerprint

2493

1918

buf = ctypes.create_string_buffer(20)

2494

1919

buf_len = ctypes.c_size_t()

2495

1920

# Get the fingerprint from the certificate into the buffer

2496

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

2497

ctypes.byref(buf_len))

1921

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1922

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

2498

1923

# Deinit the certificate

2499

gnutls.openpgp_crt_deinit(crt)

1924

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2500

1925

# Convert the buffer to a Python bytestring

2501

1926

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

2502

1927

# Convert the bytestring to hexadecimal notation

2504

1929

return hex_fpr

2505

1930

2506

1931

2507

class MultiprocessingMixIn:

1932

class MultiprocessingMixIn(object):

2508

1933

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

2509

1934

2510

1935

def sub_process_main(self, request, address):

2511

1936

try:

2512

1937

self.finish_request(request, address)

2513

1938

except Exception:

2514

1939

self.handle_error(request, address)

2515

1940

self.close_request(request)

2516

1941

2517

1942

def process_request(self, request, address):

2518

1943

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

2519

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

2520

args=(request, address))

1944

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

1945

args = (request, address))

2521

1946

proc.start()

2522

1947

return proc

2523

1948

2524

1949

2525

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

1950

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2526

1951

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

2527

1952

2528

1953

def process_request(self, request, client_address):

2529

1954

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

2530

1955

2531

1956

This function creates a new pipe in self.pipe

2532

1957

"""

2533

1958

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2534

1959

2535

1960

proc = MultiprocessingMixIn.process_request(self, request,

2536

1961

client_address)

2537

1962

self.child_pipe.close()

2538

1963

self.add_pipe(parent_pipe, proc)

2539

1964

2540

1965

def add_pipe(self, parent_pipe, proc):

2541

1966

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

2542

1967

raise NotImplementedError()

2543

1968

2544

1969

2545

1970

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2546

socketserver.TCPServer):

1971

socketserver.TCPServer, object):

2547

1972

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

2548

1973

2549

1974

Attributes:

2550

1975

enabled: Boolean; whether this server is activated yet

2551

1976

interface: None or a network interface name (string)

2552

1977

use_ipv6: Boolean; to use IPv6 or not

2553

1978

"""

2554

1979

2555

1980

def __init__(self, server_address, RequestHandlerClass,

2556

1981

interface=None,

2557

1982

use_ipv6=True,

2567

1992

self.socketfd = socketfd

2568

1993

# Save the original socket.socket() function

2569

1994

self.socket_socket = socket.socket

2570

2571

1995

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

2572

#

1996

#

2573

1997

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

2574

1998

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

2575

1999

# patching socket.socket.)

2576

#

2000

#

2577

2001

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

2578

2002

@functools.wraps(socket.socket)

2579

2003

def socket_wrapper(*args, **kwargs):

2591

2015

# socket_wrapper(), if socketfd was set.

2592

2016

socketserver.TCPServer.__init__(self, server_address,

2593

2017

RequestHandlerClass)

2594

2018

2595

2019

def server_bind(self):

2596

2020

"""This overrides the normal server_bind() function

2597

2021

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

2598

2022

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

2599

global SO_BINDTODEVICE

2600

2023

if self.interface is not None:

2601

2024

if SO_BINDTODEVICE is None:

2602

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

2603

# common enough.

2604

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

2605

SO_BINDTODEVICE = 25

2606

try:

2607

self.socket.setsockopt(

2608

socket.SOL_SOCKET, SO_BINDTODEVICE,

2609

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

2610

except socket.error as error:

2611

if error.errno == errno.EPERM:

2612

logger.error("No permission to bind to"

2613

" interface %s", self.interface)

2614

elif error.errno == errno.ENOPROTOOPT:

2615

logger.error("SO_BINDTODEVICE not available;"

2616

" cannot bind to interface %s",

2617

self.interface)

2618

elif error.errno == errno.ENODEV:

2619

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

2620

" cannot bind", self.interface)

2621

else:

2622

raise

2025

logger.error("SO_BINDTODEVICE does not exist;"

2026

" cannot bind to interface %s",

2027

self.interface)

2028

else:

2029

try:

2030

self.socket.setsockopt(

2031

socket.SOL_SOCKET, SO_BINDTODEVICE,

2032

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

2033

except socket.error as error:

2034

if error.errno == errno.EPERM:

2035

logger.error("No permission to bind to"

2036

" interface %s", self.interface)

2037

elif error.errno == errno.ENOPROTOOPT:

2038

logger.error("SO_BINDTODEVICE not available;"

2039

" cannot bind to interface %s",

2040

self.interface)

2041

elif error.errno == errno.ENODEV:

2042

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

2043

" cannot bind", self.interface)

2044

else:

2045

raise

2623

2046

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

2624

2047

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

2625

if self.server_address[1]:

2626

self.allow_reuse_address = True

2627

2048

if not self.server_address[0]:

2628

2049

if self.address_family == socket.AF_INET6:

2629

any_address = "::" # in6addr_any

2050

any_address = "::" # in6addr_any

2630

2051

else:

2631

any_address = "0.0.0.0" # INADDR_ANY

2052

any_address = "0.0.0.0" # INADDR_ANY

2632

2053

self.server_address = (any_address,

2633

2054

self.server_address[1])

2634

2055

elif not self.server_address[1]:

2644

2065

2645

2066

class MandosServer(IPv6_TCPServer):

2646

2067

"""Mandos server.

2647

2068

2648

2069

Attributes:

2649

2070

clients: set of Client objects

2650

2071

gnutls_priority GnuTLS priority string

2651

2072

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

2652

2653

Assumes a GLib.MainLoop event loop.

2073

2074

Assumes a gobject.MainLoop event loop.

2654

2075

"""

2655

2076

2656

2077

def __init__(self, server_address, RequestHandlerClass,

2657

2078

interface=None,

2658

2079

use_ipv6=True,

2668

2089

self.gnutls_priority = gnutls_priority

2669

2090

IPv6_TCPServer.__init__(self, server_address,

2670

2091

RequestHandlerClass,

2671

interface=interface,

2672

use_ipv6=use_ipv6,

2673

socketfd=socketfd)

2674

2092

interface = interface,

2093

use_ipv6 = use_ipv6,

2094

socketfd = socketfd)

2095

2675

2096

def server_activate(self):

2676

2097

if self.enabled:

2677

2098

return socketserver.TCPServer.server_activate(self)

2678

2099

2679

2100

def enable(self):

2680

2101

self.enabled = True

2681

2102

2682

2103

def add_pipe(self, parent_pipe, proc):

2683

2104

# Call "handle_ipc" for both data and EOF events

2684

GLib.io_add_watch(

2685

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

2686

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

2105

gobject.io_add_watch(

2106

parent_pipe.fileno(),

2107

gobject.IO_IN | gobject.IO_HUP,

2687

2108

functools.partial(self.handle_ipc,

2688

parent_pipe=parent_pipe,

2689

proc=proc))

2690

2109

parent_pipe = parent_pipe,

2110

proc = proc))

2111

2691

2112

def handle_ipc(self, source, condition,

2692

2113

parent_pipe=None,

2693

proc=None,

2114

proc = None,

2694

2115

client_object=None):

2695

2116

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

2696

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

2117

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

2697

2118

# Wait for other process to exit

2698

2119

proc.join()

2699

2120

return False

2700

2121

2701

2122

# Read a request from the child

2702

2123

request = parent_pipe.recv()

2703

2124

command = request[0]

2704

2125

2705

2126

if command == 'init':

2706

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

2707

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

2708

address = request[3]

2709

2710

for c in self.clients.values():

2711

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2712

continue

2713

if key_id and c.key_id == key_id:

2714

client = c

2715

break

2716

if fpr and c.fingerprint == fpr:

2127

fpr = request[1]

2128

address = request[2]

2129

2130

for c in self.clients.itervalues():

2131

if c.fingerprint == fpr:

2717

2132

client = c

2718

2133

break

2719

2134

else:

2720

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

2721

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

2135

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

2136

"dress: %s", fpr, address)

2722

2137

if self.use_dbus:

2723

2138

# Emit D-Bus signal

2724

mandos_dbus_service.ClientNotFound(key_id or fpr,

2139

mandos_dbus_service.ClientNotFound(fpr,

2725

2140

address[0])

2726

2141

parent_pipe.send(False)

2727

2142

return False

2728

2729

GLib.io_add_watch(

2730

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

2731

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

2143

2144

gobject.io_add_watch(

2145

parent_pipe.fileno(),

2146

gobject.IO_IN | gobject.IO_HUP,

2732

2147

functools.partial(self.handle_ipc,

2733

parent_pipe=parent_pipe,

2734

proc=proc,

2735

client_object=client))

2148

parent_pipe = parent_pipe,

2149

proc = proc,

2150

client_object = client))

2736

2151

parent_pipe.send(True)

2737

2152

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

2738

2153

# same fileno

2741

2156

funcname = request[1]

2742

2157

args = request[2]

2743

2158

kwargs = request[3]

2744

2159

2745

2160

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

2746

2161

funcname)(*args,

2747

2162

**kwargs)))

2748

2163

2749

2164

if command == 'getattr':

2750

2165

attrname = request[1]

2751

2166

if isinstance(client_object.__getattribute__(attrname),

2754

2169

else:

2755

2170

parent_pipe.send((

2756

2171

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

2757

2172

2758

2173

if command == 'setattr':

2759

2174

attrname = request[1]

2760

2175

value = request[2]

2761

2176

setattr(client_object, attrname, value)

2762

2177

2763

2178

return True

2764

2179

2765

2180

2766

2181

def rfc3339_duration_to_delta(duration):

2767

2182

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

2768

2769

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

2770

True

2771

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

2772

True

2773

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

2774

True

2775

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

2776

True

2777

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

2778

True

2779

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

2780

True

2781

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

2782

True

2183

2184

>>> rfc3339_duration_to_delta("P7D")

2185

datetime.timedelta(7)

2186

>>> rfc3339_duration_to_delta("PT60S")

2187

datetime.timedelta(0, 60)

2188

>>> rfc3339_duration_to_delta("PT60M")

2189

datetime.timedelta(0, 3600)

2190

>>> rfc3339_duration_to_delta("PT24H")

2191

datetime.timedelta(1)

2192

>>> rfc3339_duration_to_delta("P1W")

2193

datetime.timedelta(7)

2194

>>> rfc3339_duration_to_delta("PT5M30S")

2195

datetime.timedelta(0, 330)

2196

>>> rfc3339_duration_to_delta("P1DT3M20S")

2197

datetime.timedelta(1, 200)

2783

2198

"""

2784

2199

2785

2200

# Parsing an RFC 3339 duration with regular expressions is not

2786

2201

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

2787

2202

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

2788

2203

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

2789

2204

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

2790

2205

# avoid excessive use of external libraries.

2791

2206

2792

2207

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

2793

2208

Token = collections.namedtuple("Token", (

2794

2209

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

2827

2242

frozenset((token_year, token_month,

2828

2243

token_day, token_time,

2829

2244

token_week)))

2830

# Define starting values:

2831

# Value so far

2832

value = datetime.timedelta()

2245

# Define starting values

2246

value = datetime.timedelta() # Value so far

2833

2247

found_token = None

2834

# Following valid tokens

2835

followers = frozenset((token_duration, ))

2836

# String left to parse

2837

s = duration

2248

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

2249

s = duration # String left to parse

2838

2250

# Loop until end token is found

2839

2251

while found_token is not token_end:

2840

2252

# Search for any currently valid tokens

2864

2276

2865

2277

def string_to_delta(interval):

2866

2278

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

2867

2868

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

2869

True

2870

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

2871

True

2872

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

2873

True

2874

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

2875

True

2876

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

2877

True

2878

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

2879

True

2279

2280

>>> string_to_delta('7d')

2281

datetime.timedelta(7)

2282

>>> string_to_delta('60s')

2283

datetime.timedelta(0, 60)

2284

>>> string_to_delta('60m')

2285

datetime.timedelta(0, 3600)

2286

>>> string_to_delta('24h')

2287

datetime.timedelta(1)

2288

>>> string_to_delta('1w')

2289

datetime.timedelta(7)

2290

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

2291

datetime.timedelta(0, 330)

2880

2292

"""

2881

2293

2882

2294

try:

2883

2295

return rfc3339_duration_to_delta(interval)

2884

2296

except ValueError:

2885

2297

pass

2886

2298

2887

2299

timevalue = datetime.timedelta(0)

2888

2300

for s in interval.split():

2889

2301

try:

2907

2319

return timevalue

2908

2320

2909

2321

2910

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

2322

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

2911

2323

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

2912

2324

2913

2325

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

2914

2326

if os.fork():

2915

2327

sys.exit()

2933

2345

2934

2346

2935

2347

def main():

2936

2348

2937

2349

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

2938

2350

# Parsing of options, both command line and config file

2939

2351

2940

2352

parser = argparse.ArgumentParser()

2941

2353

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

2942

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

2354

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

2943

2355

help="show version number and exit")

2944

2356

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

2945

2357

help="Bind to interface IF")

2981

2393

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

2982

2394

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

2983

2395

default=None)

2984

2396

2985

2397

options = parser.parse_args()

2986

2398

2399

if options.check:

2400

import doctest

2401

fail_count, test_count = doctest.testmod()

2402

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

2403

2987

2404

# Default values for config file for server-global settings

2988

if gnutls.has_rawpk:

2989

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

2990

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

2991

else:

2992

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

2993

":+SIGN-DSA-SHA256")

2994

server_defaults = {"interface": "",

2995

"address": "",

2996

"port": "",

2997

"debug": "False",

2998

"priority": priority,

2999

"servicename": "Mandos",

3000

"use_dbus": "True",

3001

"use_ipv6": "True",

3002

"debuglevel": "",

3003

"restore": "True",

3004

"socket": "",

3005

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

3006

"foreground": "False",

3007

"zeroconf": "True",

3008

}

3009

del priority

3010

2405

server_defaults = { "interface": "",

2406

"address": "",

2407

"port": "",

2408

"debug": "False",

2409

"priority":

2410

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

2411

":+SIGN-DSA-SHA256",

2412

"servicename": "Mandos",

2413

"use_dbus": "True",

2414

"use_ipv6": "True",

2415

"debuglevel": "",

2416

"restore": "True",

2417

"socket": "",

2418

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

2419

"foreground": "False",

2420

"zeroconf": "True",

2421

}

2422

3011

2423

# Parse config file for server-global settings

3012

server_config = configparser.ConfigParser(server_defaults)

2424

server_config = configparser.SafeConfigParser(server_defaults)

3013

2425

del server_defaults

3014

2426

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

3015

# Convert the ConfigParser object to a dict

2427

# Convert the SafeConfigParser object to a dict

3016

2428

server_settings = server_config.defaults()

3017

2429

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

3018

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

3019

"foreground", "zeroconf"):

2430

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

3020

2431

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

3021

2432

option)

3022

2433

if server_settings["port"]:

3032

2443

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

3033

2444

["socket"])

3034

2445

del server_config

3035

2446

3036

2447

# Override the settings from the config file with command line

3037

2448

# options, if set.

3038

2449

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

3056

2467

if server_settings["debug"]:

3057

2468

server_settings["foreground"] = True

3058

2469

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

3059

2470

3060

2471

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

3061

2472

3062

2473

if (not server_settings["zeroconf"]

3063

2474

and not (server_settings["port"]

3064

2475

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

3065

2476

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

3066

2477

3067

2478

# For convenience

3068

2479

debug = server_settings["debug"]

3069

2480

debuglevel = server_settings["debuglevel"]

3073

2484

stored_state_file)

3074

2485

foreground = server_settings["foreground"]

3075

2486

zeroconf = server_settings["zeroconf"]

3076

2487

3077

2488

if debug:

3078

2489

initlogger(debug, logging.DEBUG)

3079

2490

else:

3082

2493

else:

3083

2494

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

3084

2495

initlogger(debug, level)

3085

2496

3086

2497

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

3087

2498

syslogger.setFormatter(

3088

2499

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

3089

2500

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

3090

2501

server_settings["servicename"])))

3091

2502

3092

2503

# Parse config file with clients

3093

client_config = configparser.ConfigParser(Client.client_defaults)

2504

client_config = configparser.SafeConfigParser(Client

2505

.client_defaults)

3094

2506

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

3095

2507

"clients.conf"))

3096

2508

3097

2509

global mandos_dbus_service

3098

2510

mandos_dbus_service = None

3099

2511

3100

2512

socketfd = None

3101

2513

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

3102

2514

socketfd = server_settings["socket"]

3118

2530

except IOError as e:

3119

2531

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

3120

2532

exc_info=e)

3121

3122

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

3123

("mandos", "mandos"),

3124

("nobody", "nogroup")):

2533

2534

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

3125

2535

try:

3126

2536

uid = pwd.getpwnam(name).pw_uid

3127

gid = pwd.getpwnam(group).pw_gid

2537

gid = pwd.getpwnam(name).pw_gid

3128

2538

break

3129

2539

except KeyError:

3130

2540

continue

3134

2544

try:

3135

2545

os.setgid(gid)

3136

2546

os.setuid(uid)

3137

if debug:

3138

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

3139

gid))

3140

2547

except OSError as error:

3141

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

3142

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

3143

2548

if error.errno != errno.EPERM:

3144

2549

raise

3145

2550

3146

2551

if debug:

3147

2552

# Enable all possible GnuTLS debugging

3148

2553

3149

2554

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

3150

2555

# - GnuTLS manual

3151

gnutls.global_set_log_level(11)

3152

3153

@gnutls.log_func

2556

gnutls.library.functions.gnutls_global_set_log_level(11)

2557

2558

@gnutls.library.types.gnutls_log_func

3154

2559

def debug_gnutls(level, string):

3155

2560

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

3156

3157

gnutls.global_set_log_function(debug_gnutls)

3158

2561

2562

gnutls.library.functions.gnutls_global_set_log_function(

2563

debug_gnutls)

2564

3159

2565

# Redirect stdin so all checkers get /dev/null

3160

2566

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

3161

2567

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

3162

2568

if null > 2:

3163

2569

os.close(null)

3164

2570

3165

2571

# Need to fork before connecting to D-Bus

3166

2572

if not foreground:

3167

2573

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

3168

2574

daemon()

3169

3170

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

3171

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

3172

# need to inform GLib that threads will be used.

3173

GLib.threads_init()

3174

2575

2576

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

2577

# need to inform gobject that threads will be used.

2578

gobject.threads_init()

2579

3175

2580

global main_loop

3176

2581

# From the Avahi example code

3177

2582

DBusGMainLoop(set_as_default=True)

3178

main_loop = GLib.MainLoop()

2583

main_loop = gobject.MainLoop()

3179

2584

bus = dbus.SystemBus()

3180

2585

# End of Avahi example code

3181

2586

if use_dbus:

3194

2599

if zeroconf:

3195

2600

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3196

2601

service = AvahiServiceToSyslog(

3197

name=server_settings["servicename"],

3198

servicetype="_mandos._tcp",

3199

protocol=protocol,

3200

bus=bus)

2602

name = server_settings["servicename"],

2603

servicetype = "_mandos._tcp",

2604

protocol = protocol,

2605

bus = bus)

3201

2606

if server_settings["interface"]:

3202

2607

service.interface = if_nametoindex(

3203

2608

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

3204

2609

3205

2610

global multiprocessing_manager

3206

2611

multiprocessing_manager = multiprocessing.Manager()

3207

2612

3208

2613

client_class = Client

3209

2614

if use_dbus:

3210

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

3211

2615

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

2616

3212

2617

client_settings = Client.config_parser(client_config)

3213

2618

old_client_settings = {}

3214

2619

clients_data = {}

3215

2620

3216

2621

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

3217

2622

global wnull

3218

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

2623

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

3219

2624

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

3220

2625

# mode

3221

2626

if debug or not foreground:

3222

2627

wnull.close()

3223

2628

3224

2629

# Get client data and settings from last running state.

3225

2630

if server_settings["restore"]:

3226

2631

try:

3227

2632

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

3228

if sys.version_info.major == 2:

3229

clients_data, old_client_settings = pickle.load(

3230

stored_state)

3231

else:

3232

bytes_clients_data, bytes_old_client_settings = (

3233

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

3234

# Fix bytes to strings

3235

# clients_data

3236

# .keys()

3237

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

3238

if isinstance(key, bytes)

3239

else key): value

3240

for key, value in

3241

bytes_clients_data.items()}

3242

del bytes_clients_data

3243

for key in clients_data:

3244

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

3245

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

3246

for k, v in

3247

clients_data[key].items()}

3248

clients_data[key] = value

3249

# .client_structure

3250

value["client_structure"] = [

3251

(s.decode("utf-8")

3252

if isinstance(s, bytes)

3253

else s) for s in

3254

value["client_structure"]]

3255

# .name, .host, and .checker_command

3256

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

3257

if isinstance(value[k], bytes):

3258

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

3259

if "key_id" not in value:

3260

value["key_id"] = ""

3261

elif "fingerprint" not in value:

3262

value["fingerprint"] = ""

3263

# old_client_settings

3264

# .keys()

3265

old_client_settings = {

3266

(key.decode("utf-8")

3267

if isinstance(key, bytes)

3268

else key): value

3269

for key, value in

3270

bytes_old_client_settings.items()}

3271

del bytes_old_client_settings

3272

# .host and .checker_command

3273

for value in old_client_settings.values():

3274

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

3275

if isinstance(value[attribute], bytes):

3276

value[attribute] = (value[attribute]

3277

.decode("utf-8"))

2633

clients_data, old_client_settings = pickle.load(

2634

stored_state)

3278

2635

os.remove(stored_state_path)

3279

2636

except IOError as e:

3280

2637

if e.errno == errno.ENOENT:

3288

2645

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

3289

2646

"EOFError:",

3290

2647

exc_info=e)

3291

2648

3292

2649

with PGPEngine() as pgp:

3293

2650

for client_name, client in clients_data.items():

3294

2651

# Skip removed clients

3295

2652

if client_name not in client_settings:

3296

2653

continue

3297

2654

3298

2655

# Decide which value to use after restoring saved state.

3299

2656

# We have three different values: Old config file,

3300

2657

# new config file, and saved state.

3311

2668

client[name] = value

3312

2669

except KeyError:

3313

2670

pass

3314

2671

3315

2672

# Clients who has passed its expire date can still be

3316

2673

# enabled if its last checker was successful. A Client

3317

2674

# whose checker succeeded before we stored its state is

3350

2707

client_name))

3351

2708

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

3352

2709

["secret"])

3353

2710

3354

2711

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

3355

2712

for client_name in (set(old_client_settings)

3356

2713

- set(client_settings)):

3358

2715

for client_name in (set(client_settings)

3359

2716

- set(old_client_settings)):

3360

2717

clients_data[client_name] = client_settings[client_name]

3361

2718

3362

2719

# Create all client objects

3363

2720

for client_name, client in clients_data.items():

3364

2721

tcp_server.clients[client_name] = client_class(

3365

name=client_name,

3366

settings=client,

3367

server_settings=server_settings)

3368

2722

name = client_name,

2723

settings = client,

2724

server_settings = server_settings)

2725

3369

2726

if not tcp_server.clients:

3370

2727

logger.warning("No clients defined")

3371

2728

3372

2729

if not foreground:

3373

2730

if pidfile is not None:

3374

2731

pid = os.getpid()

3380

2737

pidfilename, pid)

3381

2738

del pidfile

3382

2739

del pidfilename

3383

3384

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

3385

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3386

lambda: main_loop.quit() and False)

3387

2740

2741

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

2742

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

2743

3388

2744

if use_dbus:

3389

2745

3390

2746

@alternate_dbus_interfaces(

3391

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

3392

class MandosDBusService(DBusObjectWithObjectManager):

2747

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

2748

class MandosDBusService(DBusObjectWithProperties):

3393

2749

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

3394

2750

3395

2751

def __init__(self):

3396

2752

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

3397

2753

3398

2754

_interface = "se.recompile.Mandos"

3399

2755

2756

@dbus_interface_annotations(_interface)

2757

def _foo(self):

2758

return {

2759

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

2760

"false" }

2761

3400

2762

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

3401

2763

def ClientAdded(self, objpath):

3402

2764

"D-Bus signal"

3403

2765

pass

3404

2766

3405

2767

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

3406

def ClientNotFound(self, key_id, address):

2768

def ClientNotFound(self, fingerprint, address):

3407

2769

"D-Bus signal"

3408

2770

pass

3409

3410

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

3411

"true"})

2771

3412

2772

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

3413

2773

def ClientRemoved(self, objpath, name):

3414

2774

"D-Bus signal"

3415

2775

pass

3416

3417

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

3418

"true"})

2776

3419

2777

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

3420

2778

def GetAllClients(self):

3421

2779

"D-Bus method"

3422

2780

return dbus.Array(c.dbus_object_path for c in

3423

tcp_server.clients.values())

3424

3425

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

3426

"true"})

2781

tcp_server.clients.itervalues())

2782

3427

2783

@dbus.service.method(_interface,

3428

2784

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

3429

2785

def GetAllClientsWithProperties(self):

3430

2786

"D-Bus method"

3431

2787

return dbus.Dictionary(

3432

{c.dbus_object_path: c.GetAll(

3433

"se.recompile.Mandos.Client")

3434

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

2788

{ c.dbus_object_path: c.GetAll("")

2789

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

3435

2790

signature="oa{sv}")

3436

2791

3437

2792

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

3438

2793

def RemoveClient(self, object_path):

3439

2794

"D-Bus method"

3440

for c in tcp_server.clients.values():

2795

for c in tcp_server.clients.itervalues():

3441

2796

if c.dbus_object_path == object_path:

3442

2797

del tcp_server.clients[c.name]

3443

2798

c.remove_from_connection()

3444

# Don't signal the disabling

2799

# Don't signal anything except ClientRemoved

3445

2800

c.disable(quiet=True)

3446

# Emit D-Bus signal for removal

3447

self.client_removed_signal(c)

2801

# Emit D-Bus signal

2802

self.ClientRemoved(object_path, c.name)

3448

2803

return

3449

2804

raise KeyError(object_path)

3450

2805

3451

2806

del _interface

3452

3453

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3454

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

3455

def GetManagedObjects(self):

3456

"""D-Bus method"""

3457

return dbus.Dictionary(

3458

{client.dbus_object_path:

3459

dbus.Dictionary(

3460

{interface: client.GetAll(interface)

3461

for interface in

3462

client._get_all_interface_names()})

3463

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

3464

3465

def client_added_signal(self, client):

3466

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

3467

if use_dbus:

3468

# New standard signal

3469

self.InterfacesAdded(

3470

client.dbus_object_path,

3471

dbus.Dictionary(

3472

{interface: client.GetAll(interface)

3473

for interface in

3474

client._get_all_interface_names()}))

3475

# Old signal

3476

self.ClientAdded(client.dbus_object_path)

3477

3478

def client_removed_signal(self, client):

3479

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

3480

if use_dbus:

3481

# New standard signal

3482

self.InterfacesRemoved(

3483

client.dbus_object_path,

3484

client._get_all_interface_names())

3485

# Old signal

3486

self.ClientRemoved(client.dbus_object_path,

3487

client.name)

3488

2807

3489

2808

mandos_dbus_service = MandosDBusService()

3490

3491

# Save modules to variables to exempt the modules from being

3492

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

3493

mp = multiprocessing

3494

wn = wnull

3495

2809

3496

2810

def cleanup():

3497

2811

"Cleanup function; run on exit"

3498

2812

if zeroconf:

3499

2813

service.cleanup()

3500

3501

mp.active_children()

3502

wn.close()

2814

2815

multiprocessing.active_children()

2816

wnull.close()

3503

2817

if not (tcp_server.clients or client_settings):

3504

2818

return

3505

2819

3506

2820

# Store client before exiting. Secrets are encrypted with key

3507

2821

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

3508

2822

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

3509

2823

clients = {}

3510

2824

with PGPEngine() as pgp:

3511

for client in tcp_server.clients.values():

2825

for client in tcp_server.clients.itervalues():

3512

2826

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

3513

2827

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

3514

2828

key)

3515

2829

client_dict = {}

3516

2830

3517

2831

# A list of attributes that can not be pickled

3518

2832

# + secret.

3519

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

3520

"checker", "server_settings"}

2833

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

2834

"checker", "server_settings" }

3521

2835

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

3522

2836

.Object):

3523

2837

exclude.add(name)

3524

2838

3525

2839

client_dict["encrypted_secret"] = (client

3526

2840

.encrypted_secret)

3527

2841

for attr in client.client_structure:

3528

2842

if attr not in exclude:

3529

2843

client_dict[attr] = getattr(client, attr)

3530

2844

3531

2845

clients[client.name] = client_dict

3532

2846

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

3533

2847

3534

2848

try:

3535

2849

with tempfile.NamedTemporaryFile(

3536

2850

mode='wb',

3538

2852

prefix='clients-',

3539

2853

dir=os.path.dirname(stored_state_path),

3540

2854

delete=False) as stored_state:

3541

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

3542

protocol=2)

2855

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

3543

2856

tempname = stored_state.name

3544

2857

os.rename(tempname, stored_state_path)

3545

2858

except (IOError, OSError) as e:

3555

2868

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

3556

2869

exc_info=e)

3557

2870

raise

3558

2871

3559

2872

# Delete all clients, and settings from config

3560

2873

while tcp_server.clients:

3561

2874

name, client = tcp_server.clients.popitem()

3562

2875

if use_dbus:

3563

2876

client.remove_from_connection()

3564

# Don't signal the disabling

2877

# Don't signal anything except ClientRemoved

3565

2878

client.disable(quiet=True)

3566

# Emit D-Bus signal for removal

3567

2879

if use_dbus:

3568

mandos_dbus_service.client_removed_signal(client)

2880

# Emit D-Bus signal

2881

mandos_dbus_service.ClientRemoved(

2882

client.dbus_object_path, client.name)

3569

2883

client_settings.clear()

3570

2884

3571

2885

atexit.register(cleanup)

3572

3573

for client in tcp_server.clients.values():

2886

2887

for client in tcp_server.clients.itervalues():

3574

2888

if use_dbus:

3575

# Emit D-Bus signal for adding

3576

mandos_dbus_service.client_added_signal(client)

2889

# Emit D-Bus signal

2890

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3577

2891

# Need to initiate checking of clients

3578

2892

if client.enabled:

3579

2893

client.init_checker()

3580

2894

3581

2895

tcp_server.enable()

3582

2896

tcp_server.server_activate()

3583

2897

3584

2898

# Find out what port we got

3585

2899

if zeroconf:

3586

2900

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

3591

2905

else: # IPv4

3592

2906

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

3593

2907

*tcp_server.socket.getsockname())

3594

3595

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

3596

2908

2909

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

2910

3597

2911

try:

3598

2912

if zeroconf:

3599

2913

# From the Avahi example code

3604

2918

cleanup()

3605

2919

sys.exit(1)

3606

2920

# End of Avahi example code

3607

3608

GLib.io_add_watch(

3609

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

3610

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

3611

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

3612

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

3613

2921

2922

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

2923

lambda *args, **kwargs:

2924

(tcp_server.handle_request

2925

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

2926

3614

2927

logger.debug("Starting main loop")

3615

2928

main_loop.run()

3616

2929

except AvahiError as error:

3625

2938

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

3626

2939

cleanup()

3627

2940

3628

3629

def should_only_run_tests():

3630

parser = argparse.ArgumentParser(add_help=False)

3631

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

3632

args, unknown_args = parser.parse_known_args()

3633

run_tests = args.check

3634

if run_tests:

3635

# Remove --check argument from sys.argv

3636

sys.argv[1:] = unknown_args

3637

return run_tests

3638

3639

# Add all tests from doctest strings

3640

def load_tests(loader, tests, none):

3641

import doctest

3642

tests.addTests(doctest.DocTestSuite())

3643

return tests

3644

2941

3645

2942

if __name__ == '__main__':

3646

try:

3647

if should_only_run_tests():

3648

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

3649

unittest.main()

3650

else:

3651

main()

3652

finally:

3653

logging.shutdown()

2943

main()