/mandos/release : revision 237.7.749

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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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#!/usr/bin/python3 -bI

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

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#

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

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#

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#

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

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# service publisher, downloaded from

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

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

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

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

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#

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#

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# Everything else is

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#

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

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

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#

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# This file is part of Mandos.

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#

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

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

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

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# (at your option) any later version.

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#

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

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

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

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# WITHOUT ANY WARRANTY; without even the implied warranty of

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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# GNU General Public License for more details.

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#

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#

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

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# along with this program. If not, see

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

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#

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

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#

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

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#

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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try:

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from future_builtins import *

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except ImportError:

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pass

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try:

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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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51

try:

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import ConfigParser as configparser

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53

except ImportError:

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import itertools

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import collections

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import codecs

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import unittest

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import random

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import dbus

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import dbus.service

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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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import gi

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from gi.repository import GLib

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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if sys.version_info.major == 2:

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__metaclass__ = type

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str = unicode

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# Show warnings by default

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if not sys.warnoptions:

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import warnings

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warnings.simplefilter("default")

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# Try to find the value of SO_BINDTODEVICE:

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try:

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

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

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except AttributeError:

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try:

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# This is where SO_BINDTODEVICE was up to and including Python

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# 2.6, and also 3.2:

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from IN import SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.6.9"

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

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# Try running the C preprocessor:

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try:

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

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"/dev/stdin"],

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE)

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stdout = cc.communicate(

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

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

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except (OSError, ValueError, IndexError):

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# No value found

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SO_BINDTODEVICE = None

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if sys.version_info < (3, 2):

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configparser.Configparser = configparser.SafeConfigParser

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version = "1.8.9"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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

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syslogger = None

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try:

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if_nametoindex = ctypes.cdll.LoadLibrary(

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

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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return interface_index

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def copy_function(func):

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

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if sys.version_info.major == 2:

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return types.FunctionType(func.func_code,

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func.func_globals,

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func.func_name,

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func.func_defaults,

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func.func_closure)

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else:

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return types.FunctionType(func.__code__,

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func.__globals__,

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func.__name__,

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func.__defaults__,

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func.__closure__)

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128

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

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"""init logger and add loglevel"""

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global syslogger

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syslogger = (logging.handlers.SysLogHandler(

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facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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facility=logging.handlers.SysLogHandler.LOG_DAEMON,

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address="/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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pass

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194

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class PGPEngine(object):

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class PGPEngine:

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

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def __init__(self):

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

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self.gpg = "gpg"

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try:

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

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for line in output.splitlines():

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

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if name == b"gpg":

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self.gpg = path

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break

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except OSError as e:

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if e.errno != errno.ENOENT:

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raise

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self.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--homedir', self.tempdir,

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'--force-mdc',

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'--quiet',

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'--no-use-agent']

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'--quiet']

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

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

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

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166

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def __enter__(self):

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return self

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

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self._cleanup()

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return False

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def __del__(self):

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self._cleanup()

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def _cleanup(self):

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if self.tempdir is not None:

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# Delete contents of tempdir

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

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topdown = False):

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topdown=False):

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for filename in files:

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

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for dirname in dirs:

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# Remove tempdir

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os.rmdir(self.tempdir)

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self.tempdir = None

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241

189

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def password_encode(self, password):

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

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

196

249

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

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

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return encoded

199

252

200

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

202

255

with tempfile.NamedTemporaryFile(

203

256

dir=self.tempdir) as passfile:

204

257

passfile.write(passphrase)

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passfile.flush()

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

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

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260

'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

213

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

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE,

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stderr=subprocess.PIPE)

266

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

214

267

if proc.returncode != 0:

215

268

raise PGPError(err)

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return ciphertext

217

270

218

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def decrypt(self, data, password):

219

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passphrase = self.password_encode(password)

220

273

with tempfile.NamedTemporaryFile(

221

dir = self.tempdir) as passfile:

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

223

276

passfile.flush()

224

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

277

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

229

stdout = subprocess.PIPE,

230

stderr = subprocess.PIPE)

231

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

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stdin=subprocess.PIPE,

282

stdout=subprocess.PIPE,

283

stderr=subprocess.PIPE)

284

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

232

285

if proc.returncode != 0:

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286

raise PGPError(err)

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return decrypted_plaintext

235

288

236

289

290

# Pretend that we have an Avahi module

291

class avahi:

292

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

293

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

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

295

PROTO_INET = 0 # avahi-common/address.h

296

PROTO_INET6 = 1 # avahi-common/address.h

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DBUS_NAME = "org.freedesktop.Avahi"

298

DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

299

DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

300

DBUS_PATH_SERVER = "/"

301

302

@staticmethod

303

def string_array_to_txt_array(t):

304

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

305

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

306

ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

308

ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

309

SERVER_INVALID = 0 # avahi-common/defs.h

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SERVER_REGISTERING = 1 # avahi-common/defs.h

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SERVER_RUNNING = 2 # avahi-common/defs.h

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SERVER_COLLISION = 3 # avahi-common/defs.h

313

SERVER_FAILURE = 4 # avahi-common/defs.h

314

315

237

316

class AvahiError(Exception):

238

317

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

239

318

self.value = value

249

328

pass

250

329

251

330

252

class AvahiService(object):

331

class AvahiService:

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"""An Avahi (Zeroconf) service.

254

333

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Attributes:

256

335

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

257

336

Used to optionally bind to the specified interface.

269

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server: D-Bus Server

270

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bus: dbus.SystemBus()

271

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"""

272

351

273

352

def __init__(self,

274

interface = avahi.IF_UNSPEC,

275

name = None,

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servicetype = None,

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port = None,

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TXT = None,

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domain = "",

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host = "",

281

max_renames = 32768,

282

protocol = avahi.PROTO_UNSPEC,

283

bus = None):

353

interface=avahi.IF_UNSPEC,

354

name=None,

355

servicetype=None,

356

port=None,

357

TXT=None,

358

domain="",

359

host="",

360

max_renames=32768,

361

protocol=avahi.PROTO_UNSPEC,

362

bus=None):

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self.interface = interface

285

364

self.name = name

286

365

self.type = servicetype

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374

self.server = None

296

375

self.bus = bus

297

376

self.entry_group_state_changed_match = None

298

377

299

378

def rename(self, remove=True):

300

379

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

301

380

if self.rename_count >= self.max_renames:

321

400

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

322

401

self.cleanup()

323

402

os._exit(1)

324

403

325

404

def remove(self):

326

405

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

327

406

if self.entry_group_state_changed_match is not None:

329

408

self.entry_group_state_changed_match = None

330

409

if self.group is not None:

331

410

self.group.Reset()

332

411

333

412

def add(self):

334

413

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

335

414

self.remove()

352

431

dbus.UInt16(self.port),

353

432

avahi.string_array_to_txt_array(self.TXT))

354

433

self.group.Commit()

355

434

356

435

def entry_group_state_changed(self, state, error):

357

436

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

358

437

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

359

438

360

439

if state == avahi.ENTRY_GROUP_ESTABLISHED:

361

440

logger.debug("Zeroconf service established.")

362

441

elif state == avahi.ENTRY_GROUP_COLLISION:

366

445

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

367

446

str(error))

368

447

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

369

448

370

449

def cleanup(self):

371

450

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

372

451

if self.group is not None:

377

456

pass

378

457

self.group = None

379

458

self.remove()

380

459

381

460

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

382

461

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

383

462

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

412

491

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

413

492

else:

414

493

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

415

494

416

495

def activate(self):

417

496

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

418

497

if self.server is None:

429

508

class AvahiServiceToSyslog(AvahiService):

430

509

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

431

510

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

432

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

511

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

433

512

syslogger.setFormatter(logging.Formatter(

434

513

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

435

514

.format(self.name)))

436

515

return ret

437

516

517

518

# Pretend that we have a GnuTLS module

519

class gnutls:

520

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

521

522

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

523

if library is None:

524

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

525

_library = ctypes.cdll.LoadLibrary(library)

526

del library

527

528

# Unless otherwise indicated, the constants and types below are

529

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

530

531

# Constants

532

E_SUCCESS = 0

533

E_INTERRUPTED = -52

534

E_AGAIN = -28

535

CRT_OPENPGP = 2

536

CRT_RAWPK = 3

537

CLIENT = 2

538

SHUT_RDWR = 0

539

CRD_CERTIFICATE = 1

540

E_NO_CERTIFICATE_FOUND = -49

541

X509_FMT_DER = 0

542

NO_TICKETS = 1<<10

543

ENABLE_RAWPK = 1<<18

544

CTYPE_PEERS = 3

545

KEYID_USE_SHA256 = 1 # gnutls/x509.h

546

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

547

548

# Types

549

class session_int(ctypes.Structure):

550

_fields_ = []

551

session_t = ctypes.POINTER(session_int)

552

553

class certificate_credentials_st(ctypes.Structure):

554

_fields_ = []

555

certificate_credentials_t = ctypes.POINTER(

556

certificate_credentials_st)

557

certificate_type_t = ctypes.c_int

558

559

class datum_t(ctypes.Structure):

560

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

561

('size', ctypes.c_uint)]

562

563

class openpgp_crt_int(ctypes.Structure):

564

_fields_ = []

565

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

566

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

567

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

568

credentials_type_t = ctypes.c_int

569

transport_ptr_t = ctypes.c_void_p

570

close_request_t = ctypes.c_int

571

572

# Exceptions

573

class Error(Exception):

574

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

575

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

576

# code is passed, convert it to a string with

577

# gnutls.strerror()

578

self.code = code

579

if message is None and code is not None:

580

message = gnutls.strerror(code)

581

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

582

message, *args)

583

584

class CertificateSecurityError(Error):

585

pass

586

587

# Classes

588

class Credentials:

589

def __init__(self):

590

self._c_object = gnutls.certificate_credentials_t()

591

gnutls.certificate_allocate_credentials(

592

ctypes.byref(self._c_object))

593

self.type = gnutls.CRD_CERTIFICATE

594

595

def __del__(self):

596

gnutls.certificate_free_credentials(self._c_object)

597

598

class ClientSession:

599

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

600

self._c_object = gnutls.session_t()

601

gnutls_flags = gnutls.CLIENT

602

if gnutls.check_version(b"3.5.6"):

603

gnutls_flags |= gnutls.NO_TICKETS

604

if gnutls.has_rawpk:

605

gnutls_flags |= gnutls.ENABLE_RAWPK

606

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

607

del gnutls_flags

608

gnutls.set_default_priority(self._c_object)

609

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

610

gnutls.handshake_set_private_extensions(self._c_object,

611

True)

612

self.socket = socket

613

if credentials is None:

614

credentials = gnutls.Credentials()

615

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

616

ctypes.cast(credentials._c_object,

617

ctypes.c_void_p))

618

self.credentials = credentials

619

620

def __del__(self):

621

gnutls.deinit(self._c_object)

622

623

def handshake(self):

624

return gnutls.handshake(self._c_object)

625

626

def send(self, data):

627

data = bytes(data)

628

data_len = len(data)

629

while data_len > 0:

630

data_len -= gnutls.record_send(self._c_object,

631

data[-data_len:],

632

data_len)

633

634

def bye(self):

635

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

636

637

# Error handling functions

638

def _error_code(result):

639

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

640

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

641

if result >= 0:

642

return result

643

if result == gnutls.E_NO_CERTIFICATE_FOUND:

644

raise gnutls.CertificateSecurityError(code=result)

645

raise gnutls.Error(code=result)

646

647

def _retry_on_error(result, func, arguments):

648

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

649

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

650

while result < 0:

651

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

652

return _error_code(result)

653

result = func(*arguments)

654

return result

655

656

# Unless otherwise indicated, the function declarations below are

657

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

658

659

# Functions

660

priority_set_direct = _library.gnutls_priority_set_direct

661

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

662

ctypes.POINTER(ctypes.c_char_p)]

663

priority_set_direct.restype = _error_code

664

665

init = _library.gnutls_init

666

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

667

init.restype = _error_code

668

669

set_default_priority = _library.gnutls_set_default_priority

670

set_default_priority.argtypes = [session_t]

671

set_default_priority.restype = _error_code

672

673

record_send = _library.gnutls_record_send

674

record_send.argtypes = [session_t, ctypes.c_void_p,

675

ctypes.c_size_t]

676

record_send.restype = ctypes.c_ssize_t

677

record_send.errcheck = _retry_on_error

678

679

certificate_allocate_credentials = (

680

_library.gnutls_certificate_allocate_credentials)

681

certificate_allocate_credentials.argtypes = [

682

ctypes.POINTER(certificate_credentials_t)]

683

certificate_allocate_credentials.restype = _error_code

684

685

certificate_free_credentials = (

686

_library.gnutls_certificate_free_credentials)

687

certificate_free_credentials.argtypes = [

688

certificate_credentials_t]

689

certificate_free_credentials.restype = None

690

691

handshake_set_private_extensions = (

692

_library.gnutls_handshake_set_private_extensions)

693

handshake_set_private_extensions.argtypes = [session_t,

694

ctypes.c_int]

695

handshake_set_private_extensions.restype = None

696

697

credentials_set = _library.gnutls_credentials_set

698

credentials_set.argtypes = [session_t, credentials_type_t,

699

ctypes.c_void_p]

700

credentials_set.restype = _error_code

701

702

strerror = _library.gnutls_strerror

703

strerror.argtypes = [ctypes.c_int]

704

strerror.restype = ctypes.c_char_p

705

706

certificate_type_get = _library.gnutls_certificate_type_get

707

certificate_type_get.argtypes = [session_t]

708

certificate_type_get.restype = _error_code

709

710

certificate_get_peers = _library.gnutls_certificate_get_peers

711

certificate_get_peers.argtypes = [session_t,

712

ctypes.POINTER(ctypes.c_uint)]

713

certificate_get_peers.restype = ctypes.POINTER(datum_t)

714

715

global_set_log_level = _library.gnutls_global_set_log_level

716

global_set_log_level.argtypes = [ctypes.c_int]

717

global_set_log_level.restype = None

718

719

global_set_log_function = _library.gnutls_global_set_log_function

720

global_set_log_function.argtypes = [log_func]

721

global_set_log_function.restype = None

722

723

deinit = _library.gnutls_deinit

724

deinit.argtypes = [session_t]

725

deinit.restype = None

726

727

handshake = _library.gnutls_handshake

728

handshake.argtypes = [session_t]

729

handshake.restype = _error_code

730

handshake.errcheck = _retry_on_error

731

732

transport_set_ptr = _library.gnutls_transport_set_ptr

733

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

734

transport_set_ptr.restype = None

735

736

bye = _library.gnutls_bye

737

bye.argtypes = [session_t, close_request_t]

738

bye.restype = _error_code

739

bye.errcheck = _retry_on_error

740

741

check_version = _library.gnutls_check_version

742

check_version.argtypes = [ctypes.c_char_p]

743

check_version.restype = ctypes.c_char_p

744

745

_need_version = b"3.3.0"

746

if check_version(_need_version) is None:

747

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

748

.format(_need_version))

749

750

_tls_rawpk_version = b"3.6.6"

751

has_rawpk = bool(check_version(_tls_rawpk_version))

752

753

if has_rawpk:

754

# Types

755

class pubkey_st(ctypes.Structure):

756

_fields = []

757

pubkey_t = ctypes.POINTER(pubkey_st)

758

759

x509_crt_fmt_t = ctypes.c_int

760

761

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

762

pubkey_init = _library.gnutls_pubkey_init

763

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

764

pubkey_init.restype = _error_code

765

766

pubkey_import = _library.gnutls_pubkey_import

767

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

768

x509_crt_fmt_t]

769

pubkey_import.restype = _error_code

770

771

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

772

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

773

ctypes.POINTER(ctypes.c_ubyte),

774

ctypes.POINTER(ctypes.c_size_t)]

775

pubkey_get_key_id.restype = _error_code

776

777

pubkey_deinit = _library.gnutls_pubkey_deinit

778

pubkey_deinit.argtypes = [pubkey_t]

779

pubkey_deinit.restype = None

780

else:

781

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

782

783

openpgp_crt_init = _library.gnutls_openpgp_crt_init

784

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

785

openpgp_crt_init.restype = _error_code

786

787

openpgp_crt_import = _library.gnutls_openpgp_crt_import

788

openpgp_crt_import.argtypes = [openpgp_crt_t,

789

ctypes.POINTER(datum_t),

790

openpgp_crt_fmt_t]

791

openpgp_crt_import.restype = _error_code

792

793

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

794

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

795

ctypes.POINTER(ctypes.c_uint)]

796

openpgp_crt_verify_self.restype = _error_code

797

798

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

799

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

800

openpgp_crt_deinit.restype = None

801

802

openpgp_crt_get_fingerprint = (

803

_library.gnutls_openpgp_crt_get_fingerprint)

804

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

805

ctypes.c_void_p,

806

ctypes.POINTER(

807

ctypes.c_size_t)]

808

openpgp_crt_get_fingerprint.restype = _error_code

809

810

if check_version(b"3.6.4"):

811

certificate_type_get2 = _library.gnutls_certificate_type_get2

812

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

813

certificate_type_get2.restype = _error_code

814

815

# Remove non-public functions

816

del _error_code, _retry_on_error

817

818

438

819

def call_pipe(connection, # : multiprocessing.Connection

439

820

func, *args, **kwargs):

440

821

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

441

822

442

823

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

443

824

return value on the provided multiprocessing.Connection.

444

825

"""

445

826

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

446

827

connection.close()

447

828

448

class Client(object):

829

830

class Client:

449

831

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

450

832

451

833

Attributes:

452

834

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

453

835

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

454

836

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

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

837

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

838

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

839

running.

840

checker_callback_tag: a GLib event source tag, or None

459

841

checker_command: string; External command which is run to check

460

842

if client lives. %() expansions are done at

461

843

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

462

844

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

463

checker_initiator_tag: a gobject event source tag, or None

845

checker_initiator_tag: a GLib event source tag, or None

464

846

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

465

847

client_structure: Object describing what attributes a client has

466

848

and is used for storing the client at exit

467

849

current_checker_command: string; current running checker_command

468

disable_initiator_tag: a gobject event source tag, or None

850

disable_initiator_tag: a GLib event source tag, or None

469

851

enabled: bool()

470

852

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

471

uniquely identify the client

853

uniquely identify an OpenPGP client

854

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

855

a client using raw public keys

472

856

host: string; available for use by the checker command

473

857

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

474

858

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

490

874

disabled, or None

491

875

server_settings: The server_settings dict from main()

492

876

"""

493

877

494

878

runtime_expansions = ("approval_delay", "approval_duration",

495

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

879

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

496

880

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

497

881

"last_approval_request", "last_checked_ok",

498

882

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

507

891

"approved_by_default": "True",

508

892

"enabled": "True",

509

893

}

510

894

511

895

@staticmethod

512

896

def config_parser(config):

513

897

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

520

904

for client_name in config.sections():

521

905

section = dict(config.items(client_name))

522

906

client = settings[client_name] = {}

523

907

524

908

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

525

909

# Reformat values from string types to Python types

526

910

client["approved_by_default"] = config.getboolean(

527

911

client_name, "approved_by_default")

528

912

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

529

913

"enabled")

530

531

# Uppercase and remove spaces from fingerprint for later

532

# comparison purposes with return value from the

533

# fingerprint() function

914

915

# Uppercase and remove spaces from key_id and fingerprint

916

# for later comparison purposes with return value from the

917

# key_id() and fingerprint() functions

918

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

919

.replace(" ", ""))

534

920

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

535

921

.replace(" ", ""))

536

922

if "secret" in section:

537

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

923

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

924

.encode("utf-8"),

925

"base64")

538

926

elif "secfile" in section:

539

927

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

540

928

(section["secfile"])),

555

943

client["last_approval_request"] = None

556

944

client["last_checked_ok"] = None

557

945

client["last_checker_status"] = -2

558

946

559

947

return settings

560

561

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

948

949

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

562

950

self.name = name

563

951

if server_settings is None:

564

952

server_settings = {}

566

954

# adding all client settings

567

955

for setting, value in settings.items():

568

956

setattr(self, setting, value)

569

957

570

958

if self.enabled:

571

959

if not hasattr(self, "last_enabled"):

572

960

self.last_enabled = datetime.datetime.utcnow()

576

964

else:

577

965

self.last_enabled = None

578

966

self.expires = None

579

967

580

968

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

969

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

581

970

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

582

971

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

583

972

datetime.datetime.utcnow())

584

973

585

974

# attributes specific for this server instance

586

975

self.checker = None

587

976

self.checker_initiator_tag = None

593

982

self.changedstate = multiprocessing_manager.Condition(

594

983

multiprocessing_manager.Lock())

595

984

self.client_structure = [attr

596

for attr in self.__dict__.iterkeys()

985

for attr in self.__dict__.keys()

597

986

if not attr.startswith("_")]

598

987

self.client_structure.append("client_structure")

599

988

600

989

for name, t in inspect.getmembers(

601

990

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

602

991

if not name.startswith("_"):

603

992

self.client_structure.append(name)

604

993

605

994

# Send notice to process children that client state has changed

606

995

def send_changedstate(self):

607

996

with self.changedstate:

608

997

self.changedstate.notify_all()

609

998

610

999

def enable(self):

611

1000

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

612

1001

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

617

1006

self.last_enabled = datetime.datetime.utcnow()

618

1007

self.init_checker()

619

1008

self.send_changedstate()

620

1009

621

1010

def disable(self, quiet=True):

622

1011

"""Disable this client."""

623

1012

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

625

1014

if not quiet:

626

1015

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

627

1016

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

628

gobject.source_remove(self.disable_initiator_tag)

1017

GLib.source_remove(self.disable_initiator_tag)

629

1018

self.disable_initiator_tag = None

630

1019

self.expires = None

631

1020

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

632

gobject.source_remove(self.checker_initiator_tag)

1021

GLib.source_remove(self.checker_initiator_tag)

633

1022

self.checker_initiator_tag = None

634

1023

self.stop_checker()

635

1024

self.enabled = False

636

1025

if not quiet:

637

1026

self.send_changedstate()

638

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

1027

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

639

1028

return False

640

1029

641

1030

def __del__(self):

642

1031

self.disable()

643

1032

644

1033

def init_checker(self):

645

1034

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

646

1035

# and every interval from then on.

647

1036

if self.checker_initiator_tag is not None:

648

gobject.source_remove(self.checker_initiator_tag)

649

self.checker_initiator_tag = gobject.timeout_add(

650

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

1037

GLib.source_remove(self.checker_initiator_tag)

1038

self.checker_initiator_tag = GLib.timeout_add(

1039

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

1040

+ 1)),

651

1041

self.start_checker)

652

1042

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

653

1043

if self.disable_initiator_tag is not None:

654

gobject.source_remove(self.disable_initiator_tag)

655

self.disable_initiator_tag = gobject.timeout_add(

1044

GLib.source_remove(self.disable_initiator_tag)

1045

self.disable_initiator_tag = GLib.timeout_add(

656

1046

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

657

1047

# Also start a new checker *right now*.

658

1048

self.start_checker()

659

1049

660

1050

def checker_callback(self, source, condition, connection,

661

1051

command):

662

1052

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

663

self.checker_callback_tag = None

664

self.checker = None

665

1053

# Read return code from connection (see call_pipe)

666

1054

returncode = connection.recv()

667

1055

connection.close()

668

1056

if self.checker is not None:

1057

self.checker.join()

1058

self.checker_callback_tag = None

1059

self.checker = None

1060

669

1061

if returncode >= 0:

670

1062

self.last_checker_status = returncode

671

1063

self.last_checker_signal = None

681

1073

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

682

1074

vars(self))

683

1075

return False

684

1076

685

1077

def checked_ok(self):

686

1078

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

687

1079

self.last_checked_ok = datetime.datetime.utcnow()

688

1080

self.last_checker_status = 0

689

1081

self.last_checker_signal = None

690

1082

self.bump_timeout()

691

1083

692

1084

def bump_timeout(self, timeout=None):

693

1085

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

694

1086

if timeout is None:

695

1087

timeout = self.timeout

696

1088

if self.disable_initiator_tag is not None:

697

gobject.source_remove(self.disable_initiator_tag)

1089

GLib.source_remove(self.disable_initiator_tag)

698

1090

self.disable_initiator_tag = None

699

1091

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

700

self.disable_initiator_tag = gobject.timeout_add(

1092

self.disable_initiator_tag = GLib.timeout_add(

701

1093

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

702

1094

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

703

1095

704

1096

def need_approval(self):

705

1097

self.last_approval_request = datetime.datetime.utcnow()

706

1098

707

1099

def start_checker(self):

708

1100

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

709

1101

710

1102

If a checker already exists, leave it running and do

711

1103

nothing."""

712

1104

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

717

1109

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

718

1110

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

719

1111

# should be.

720

1112

721

1113

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

722

1114

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

723

1115

self.checker.join()

727

1119

# Escape attributes for the shell

728

1120

escaped_attrs = {

729

1121

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

730

for attr in self.runtime_expansions }

1122

for attr in self.runtime_expansions}

731

1123

try:

732

1124

command = self.checker_command % escaped_attrs

733

1125

except TypeError as error:

745

1137

# The exception is when not debugging but nevertheless

746

1138

# running in the foreground; use the previously

747

1139

# created wnull.

748

popen_args = { "close_fds": True,

749

"shell": True,

750

"cwd": "/" }

1140

popen_args = {"close_fds": True,

1141

"shell": True,

1142

"cwd": "/"}

751

1143

if (not self.server_settings["debug"]

752

1144

and self.server_settings["foreground"]):

753

1145

popen_args.update({"stdout": wnull,

754

"stderr": wnull })

755

pipe = multiprocessing.Pipe(duplex = False)

1146

"stderr": wnull})

1147

pipe = multiprocessing.Pipe(duplex=False)

756

1148

self.checker = multiprocessing.Process(

757

target = call_pipe,

758

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

759

kwargs = popen_args)

1149

target=call_pipe,

1150

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

1151

kwargs=popen_args)

760

1152

self.checker.start()

761

self.checker_callback_tag = gobject.io_add_watch(

762

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

1153

self.checker_callback_tag = GLib.io_add_watch(

1154

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

1155

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

763

1156

self.checker_callback, pipe[0], command)

764

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

1157

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

765

1158

return True

766

1159

767

1160

def stop_checker(self):

768

1161

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

769

1162

if self.checker_callback_tag:

770

gobject.source_remove(self.checker_callback_tag)

1163

GLib.source_remove(self.checker_callback_tag)

771

1164

self.checker_callback_tag = None

772

1165

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

773

1166

return

782

1175

byte_arrays=False):

783

1176

"""Decorators for marking methods of a DBusObjectWithProperties to

784

1177

become properties on the D-Bus.

785

1178

786

1179

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

787

1180

and with one argument by "Set".

788

1181

789

1182

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

790

1183

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

791

1184

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

795

1188

if byte_arrays and signature != "ay":

796

1189

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

797

1190

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

798

1191

799

1192

def decorator(func):

800

1193

func._dbus_is_property = True

801

1194

func._dbus_interface = dbus_interface

804

1197

func._dbus_name = func.__name__

805

1198

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

806

1199

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

807

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1200

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

808

1201

return func

809

1202

810

1203

return decorator

811

1204

812

1205

813

1206

def dbus_interface_annotations(dbus_interface):

814

1207

"""Decorator for marking functions returning interface annotations

815

1208

816

1209

Usage:

817

1210

818

1211

@dbus_interface_annotations("org.example.Interface")

819

1212

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

820

1213

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

821

1214

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

822

1215

"false"}

823

1216

"""

824

1217

825

1218

def decorator(func):

826

1219

func._dbus_is_interface = True

827

1220

func._dbus_interface = dbus_interface

828

1221

func._dbus_name = dbus_interface

829

1222

return func

830

1223

831

1224

return decorator

832

1225

833

1226

834

1227

def dbus_annotations(annotations):

835

1228

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

836

1229

Usage:

837

1230

838

1231

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

839

1232

"org.freedesktop.DBus.Property."

840

1233

"EmitsChangedSignal": "false"})

842

1235

access="r")

843

1236

def Property_dbus_property(self):

844

1237

return dbus.Boolean(False)

1238

1239

See also the DBusObjectWithAnnotations class.

845

1240

"""

846

1241

847

1242

def decorator(func):

848

1243

func._dbus_annotations = annotations

849

1244

return func

850

1245

851

1246

return decorator

852

1247

853

1248

869

1264

pass

870

1265

871

1266

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.

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.

878

1272

"""

879

1273

880

1274

@staticmethod

881

1275

def _is_dbus_thing(thing):

882

1276

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

883

1277

884

1278

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

885

1279

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

886

1280

"""

887

1281

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

888

1282

False)

889

1283

890

1284

def _get_all_dbus_things(self, thing):

891

1285

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

892

1286

"""

895

1289

for cls in self.__class__.__mro__

896

1290

for name, athing in

897

1291

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

898

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

899

1364

def _get_dbus_property(self, interface_name, property_name):

900

1365

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

901

1366

property with the specified name and interface.

906

1371

if (value._dbus_name == property_name

907

1372

and value._dbus_interface == interface_name):

908

1373

return value.__get__(self)

909

1374

910

1375

# No such property

911

1376

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

912

1377

self.dbus_object_path, interface_name, property_name))

913

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

914

1388

@dbus.service.method(dbus.PROPERTIES_IFACE,

915

1389

in_signature="ss",

916

1390

out_signature="v")

924

1398

if not hasattr(value, "variant_level"):

925

1399

return value

926

1400

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

927

1401

928

1402

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

929

1403

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

930

1404

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

939

1413

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

940

1414

"'ay' signature {!r}"

941

1415

.format(prop._dbus_signature))

942

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

943

for byte in value))

1416

value = dbus.ByteArray(bytes(value))

944

1417

prop(value)

945

1418

946

1419

@dbus.service.method(dbus.PROPERTIES_IFACE,

947

1420

in_signature="s",

948

1421

out_signature="a{sv}")

949

1422

def GetAll(self, interface_name):

950

1423

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

951

1424

standard.

952

1425

953

1426

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

954

1427

"""

955

1428

properties = {}

966

1439

properties[name] = value

967

1440

continue

968

1441

properties[name] = type(value)(

969

value, variant_level = value.variant_level + 1)

1442

value, variant_level=value.variant_level + 1)

970

1443

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

971

1444

972

1445

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

973

1446

def PropertiesChanged(self, interface_name, changed_properties,

974

1447

invalidated_properties):

976

1449

standard.

977

1450

"""

978

1451

pass

979

1452

980

1453

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

981

1454

out_signature="s",

982

1455

path_keyword='object_path',

983

1456

connection_keyword='connection')

984

1457

def Introspect(self, object_path, connection):

985

1458

"""Overloading of standard D-Bus method.

986

1459

987

1460

Inserts property tags and interface annotation tags.

988

1461

"""

989

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

990

connection)

1462

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1463

object_path,

1464

connection)

991

1465

try:

992

1466

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

993

1467

994

1468

def make_tag(document, name, prop):

995

1469

e = document.createElement("property")

996

1470

e.setAttribute("name", name)

997

1471

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

998

1472

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

999

1473

return e

1000

1474

1001

1475

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

1002

1476

# Add property tags

1003

1477

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

1006

1480

if prop._dbus_interface

1007

1481

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

1008

1482

if_tag.appendChild(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)

1483

# Add annotation tags for properties

1484

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

1485

annots = dict()

1486

for name, prop in self._get_all_dbus_things(

1487

"property"):

1488

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

1489

and prop._dbus_interface

1490

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

1491

annots.update(getattr(

1492

prop, "_dbus_annotations", {}))

1493

for name, value in annots.items():

1494

ann_tag = document.createElement(

1495

"annotation")

1496

ann_tag.setAttribute("name", name)

1497

ann_tag.setAttribute("value", value)

1498

tag.appendChild(ann_tag)

1038

1499

# Add the names to the return values for the

1039

1500

# "org.freedesktop.DBus.Properties" methods

1040

1501

if (if_tag.getAttribute("name")

1059

1520

return xmlstring

1060

1521

1061

1522

1523

try:

1524

dbus.OBJECT_MANAGER_IFACE

1525

except AttributeError:

1526

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

1527

1528

1529

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1530

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

1531

1532

Classes inheriting from this exposes the standard

1533

GetManagedObjects call and the InterfacesAdded and

1534

InterfacesRemoved signals on the standard

1535

"org.freedesktop.DBus.ObjectManager" interface.

1536

1537

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

1538

manually.

1539

"""

1540

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1541

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

1542

def GetManagedObjects(self):

1543

"""This function must be overridden"""

1544

raise NotImplementedError()

1545

1546

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1547

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

1548

def InterfacesAdded(self, object_path, interfaces_and_properties):

1549

pass

1550

1551

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

1552

def InterfacesRemoved(self, object_path, interfaces):

1553

pass

1554

1555

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1556

out_signature="s",

1557

path_keyword='object_path',

1558

connection_keyword='connection')

1559

def Introspect(self, object_path, connection):

1560

"""Overloading of standard D-Bus method.

1561

1562

Override return argument name of GetManagedObjects to be

1563

"objpath_interfaces_and_properties"

1564

"""

1565

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1566

object_path,

1567

connection)

1568

try:

1569

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

1570

1571

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

1572

# Fix argument name for the GetManagedObjects method

1573

if (if_tag.getAttribute("name")

1574

== dbus.OBJECT_MANAGER_IFACE):

1575

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

1576

if (cn.getAttribute("name")

1577

== "GetManagedObjects"):

1578

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

1579

if (arg.getAttribute("direction")

1580

== "out"):

1581

arg.setAttribute(

1582

"name",

1583

"objpath_interfaces"

1584

"_and_properties")

1585

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

1586

document.unlink()

1587

except (AttributeError, xml.dom.DOMException,

1588

xml.parsers.expat.ExpatError) as error:

1589

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

1590

exc_info=error)

1591

return xmlstring

1592

1593

1062

1594

def datetime_to_dbus(dt, variant_level=0):

1063

1595

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

1064

1596

if dt is None:

1065

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

1597

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

1066

1598

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

1067

1599

1068

1600

1071

1603

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

1072

1604

interface names according to the "alt_interface_names" mapping.

1073

1605

Usage:

1074

1606

1075

1607

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

1076

1608

"net.example.AlternateInterface"})

1077

1609

class SampleDBusObject(dbus.service.Object):

1078

1610

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

1079

1611

def SampleDBusMethod():

1080

1612

pass

1081

1613

1082

1614

The above "SampleDBusMethod" on "SampleDBusObject" will be

1083

1615

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

1084

1616

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

1085

1617

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

1086

1618

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

1087

1619

1088

1620

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

1089

1621

(from DBusObjectWithProperties) and interfaces (from the

1090

1622

dbus_interface_annotations decorator).

1091

1623

"""

1092

1624

1093

1625

def wrapper(cls):

1094

1626

for orig_interface_name, alt_interface_name in (

1095

1627

alt_interface_names.items()):

1110

1642

interface_names.add(alt_interface)

1111

1643

# Is this a D-Bus signal?

1112

1644

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

1645

# Extract the original non-method undecorated

1646

# function by black magic

1113

1647

if sys.version_info.major == 2:

1114

# Extract the original non-method undecorated

1115

# function by black magic

1116

1648

nonmethod_func = (dict(

1117

1649

zip(attribute.func_code.co_freevars,

1118

1650

attribute.__closure__))

1119

1651

["func"].cell_contents)

1120

1652

else:

1121

nonmethod_func = attribute

1653

nonmethod_func = (dict(

1654

zip(attribute.__code__.co_freevars,

1655

attribute.__closure__))

1656

["func"].cell_contents)

1122

1657

# Create a new, but exactly alike, function

1123

1658

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

1124

1659

# with the alternate D-Bus interface name

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__)

1660

new_function = copy_function(nonmethod_func)

1139

1661

new_function = (dbus.service.signal(

1140

1662

alt_interface,

1141

1663

attribute._dbus_signature)(new_function))

1145

1667

attribute._dbus_annotations)

1146

1668

except AttributeError:

1147

1669

pass

1670

1148

1671

# Define a creator of a function to call both the

1149

1672

# original and alternate functions, so both the

1150

1673

# original and alternate signals gets sent when

1153

1676

"""This function is a scope container to pass

1154

1677

func1 and func2 to the "call_both" function

1155

1678

outside of its arguments"""

1156

1679

1680

@functools.wraps(func2)

1157

1681

def call_both(*args, **kwargs):

1158

1682

"""This function will emit two D-Bus

1159

1683

signals by calling func1 and func2"""

1160

1684

func1(*args, **kwargs)

1161

1685

func2(*args, **kwargs)

1162

1686

# Make wrapper function look like a D-Bus

1687

# signal

1688

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

1689

if name.startswith("_dbus_"):

1690

setattr(call_both, name, attr)

1691

1163

1692

return call_both

1164

1693

# Create the "call_both" function and add it to

1165

1694

# the class

1175

1704

alt_interface,

1176

1705

attribute._dbus_in_signature,

1177

1706

attribute._dbus_out_signature)

1178

(types.FunctionType(attribute.func_code,

1179

attribute.func_globals,

1180

attribute.func_name,

1181

attribute.func_defaults,

1182

attribute.func_closure)))

1707

(copy_function(attribute)))

1183

1708

# Copy annotations, if any

1184

1709

try:

1185

1710

attr[attrname]._dbus_annotations = dict(

1197

1722

attribute._dbus_access,

1198

1723

attribute._dbus_get_args_options

1199

1724

["byte_arrays"])

1200

(types.FunctionType(

1201

attribute.func_code,

1202

attribute.func_globals,

1203

attribute.func_name,

1204

attribute.func_defaults,

1205

attribute.func_closure)))

1725

(copy_function(attribute)))

1206

1726

# Copy annotations, if any

1207

1727

try:

1208

1728

attr[attrname]._dbus_annotations = dict(

1217

1737

# to the class.

1218

1738

attr[attrname] = (

1219

1739

dbus_interface_annotations(alt_interface)

1220

(types.FunctionType(attribute.func_code,

1221

attribute.func_globals,

1222

attribute.func_name,

1223

attribute.func_defaults,

1224

attribute.func_closure)))

1740

(copy_function(attribute)))

1225

1741

if deprecate:

1226

1742

# Deprecate all alternate interfaces

1227

iname="_AlternateDBusNames_interface_annotation{}"

1743

iname = "_AlternateDBusNames_interface_annotation{}"

1228

1744

for interface_name in interface_names:

1229

1745

1230

1746

@dbus_interface_annotations(interface_name)

1231

1747

def func(self):

1232

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

1233

"true" }

1748

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

1749

"true"}

1234

1750

# Find an unused name

1235

1751

for aname in (iname.format(i)

1236

1752

for i in itertools.count()):

1240

1756

if interface_names:

1241

1757

# Replace the class with a new subclass of it with

1242

1758

# methods, signals, etc. as created above.

1243

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

1244

(cls, ), attr)

1759

if sys.version_info.major == 2:

1760

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

1761

(cls, ), attr)

1762

else:

1763

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

1764

(cls, ), attr)

1245

1765

return cls

1246

1766

1247

1767

return wrapper

1248

1768

1249

1769

1251

1771

"se.bsnet.fukt.Mandos"})

1252

1772

class ClientDBus(Client, DBusObjectWithProperties):

1253

1773

"""A Client class using D-Bus

1254

1774

1255

1775

Attributes:

1256

1776

dbus_object_path: dbus.ObjectPath

1257

1777

bus: dbus.SystemBus()

1258

1778

"""

1259

1779

1260

1780

runtime_expansions = (Client.runtime_expansions

1261

1781

+ ("dbus_object_path", ))

1262

1782

1263

1783

_interface = "se.recompile.Mandos.Client"

1264

1784

1265

1785

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

1266

1267

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

1786

1787

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

1268

1788

self.bus = bus

1269

1789

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

1270

1790

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

1276

1796

"/clients/" + client_object_name)

1277

1797

DBusObjectWithProperties.__init__(self, self.bus,

1278

1798

self.dbus_object_path)

1279

1799

1280

1800

def notifychangeproperty(transform_func, dbus_name,

1281

1801

type_func=lambda x: x,

1282

1802

variant_level=1,

1284

1804

_interface=_interface):

1285

1805

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

1286

1806

its changes to DBus.

1287

1807

1288

1808

transform_fun: Function that takes a value and a variant_level

1289

1809

and transforms it to a D-Bus type.

1290

1810

dbus_name: D-Bus name of the variable

1293

1813

variant_level: D-Bus variant level. Default: 1

1294

1814

"""

1295

1815

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

1296

1816

1297

1817

def setter(self, value):

1298

1818

if hasattr(self, "dbus_object_path"):

1299

1819

if (not hasattr(self, attrname) or

1306

1826

else:

1307

1827

dbus_value = transform_func(

1308

1828

type_func(value),

1309

variant_level = variant_level)

1829

variant_level=variant_level)

1310

1830

self.PropertyChanged(dbus.String(dbus_name),

1311

1831

dbus_value)

1312

1832

self.PropertiesChanged(

1313

1833

_interface,

1314

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

1315

dbus_value }),

1834

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

1835

dbus_value}),

1316

1836

dbus.Array())

1317

1837

setattr(self, attrname, value)

1318

1838

1319

1839

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

1320

1840

1321

1841

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1322

1842

approvals_pending = notifychangeproperty(dbus.Boolean,

1323

1843

"ApprovalPending",

1324

type_func = bool)

1844

type_func=bool)

1325

1845

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

1326

1846

last_enabled = notifychangeproperty(datetime_to_dbus,

1327

1847

"LastEnabled")

1328

1848

checker = notifychangeproperty(

1329

1849

dbus.Boolean, "CheckerRunning",

1330

type_func = lambda checker: checker is not None)

1850

type_func=lambda checker: checker is not None)

1331

1851

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1332

1852

"LastCheckedOK")

1333

1853

last_checker_status = notifychangeproperty(dbus.Int16,

1338

1858

"ApprovedByDefault")

1339

1859

approval_delay = notifychangeproperty(

1340

1860

dbus.UInt64, "ApprovalDelay",

1341

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

1861

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

1342

1862

approval_duration = notifychangeproperty(

1343

1863

dbus.UInt64, "ApprovalDuration",

1344

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

1864

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

1345

1865

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

1346

1866

timeout = notifychangeproperty(

1347

1867

dbus.UInt64, "Timeout",

1348

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

1868

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

1349

1869

extended_timeout = notifychangeproperty(

1350

1870

dbus.UInt64, "ExtendedTimeout",

1351

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

1871

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

1352

1872

interval = notifychangeproperty(

1353

1873

dbus.UInt64, "Interval",

1354

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

1874

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

1355

1875

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

1356

1876

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

1357

1877

invalidate_only=True)

1358

1878

1359

1879

del notifychangeproperty

1360

1880

1361

1881

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

1362

1882

try:

1363

1883

self.remove_from_connection()

1366

1886

if hasattr(DBusObjectWithProperties, "__del__"):

1367

1887

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

1368

1888

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

1369

1889

1370

1890

def checker_callback(self, source, condition,

1371

1891

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

1372

1892

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

1376

1896

if exitstatus >= 0:

1377

1897

# Emit D-Bus signal

1378

1898

self.CheckerCompleted(dbus.Int16(exitstatus),

1379

dbus.Int64(0),

1899

# This is specific to GNU libC

1900

dbus.Int64(exitstatus << 8),

1380

1901

dbus.String(command))

1381

1902

else:

1382

1903

# Emit D-Bus signal

1383

1904

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

1384

1905

dbus.Int64(

1385

self.last_checker_signal),

1906

# This is specific to GNU libC

1907

(exitstatus << 8)

1908

| self.last_checker_signal),

1386

1909

dbus.String(command))

1387

1910

return ret

1388

1911

1389

1912

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

1390

1913

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

1391

1914

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

1395

1918

# Emit D-Bus signal

1396

1919

self.CheckerStarted(self.current_checker_command)

1397

1920

return r

1398

1921

1399

1922

def _reset_approved(self):

1400

1923

self.approved = None

1401

1924

return False

1402

1925

1403

1926

def approve(self, value=True):

1404

1927

self.approved = value

1405

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

1406

* 1000), self._reset_approved)

1928

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

1929

* 1000), self._reset_approved)

1407

1930

self.send_changedstate()

1408

1409

## D-Bus methods, signals & properties

1410

1411

## Interfaces

1412

1413

## Signals

1414

1931

1932

# D-Bus methods, signals & properties

1933

1934

# Interfaces

1935

1936

# Signals

1937

1415

1938

# CheckerCompleted - signal

1416

1939

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

1417

1940

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

1418

1941

"D-Bus signal"

1419

1942

pass

1420

1943

1421

1944

# CheckerStarted - signal

1422

1945

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

1423

1946

def CheckerStarted(self, command):

1424

1947

"D-Bus signal"

1425

1948

pass

1426

1949

1427

1950

# PropertyChanged - signal

1428

1951

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

1429

1952

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

1430

1953

def PropertyChanged(self, property, value):

1431

1954

"D-Bus signal"

1432

1955

pass

1433

1956

1434

1957

# GotSecret - signal

1435

1958

@dbus.service.signal(_interface)

1436

1959

def GotSecret(self):

1439

1962

server to mandos-client

1440

1963

"""

1441

1964

pass

1442

1965

1443

1966

# Rejected - signal

1444

1967

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

1445

1968

def Rejected(self, reason):

1446

1969

"D-Bus signal"

1447

1970

pass

1448

1971

1449

1972

# NeedApproval - signal

1450

1973

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

1451

1974

def NeedApproval(self, timeout, default):

1452

1975

"D-Bus signal"

1453

1976

return self.need_approval()

1454

1455

## Methods

1456

1977

1978

# Methods

1979

1457

1980

# Approve - method

1458

1981

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

1459

1982

def Approve(self, value):

1460

1983

self.approve(value)

1461

1984

1462

1985

# CheckedOK - method

1463

1986

@dbus.service.method(_interface)

1464

1987

def CheckedOK(self):

1465

1988

self.checked_ok()

1466

1989

1467

1990

# Enable - method

1991

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

1468

1992

@dbus.service.method(_interface)

1469

1993

def Enable(self):

1470

1994

"D-Bus method"

1471

1995

self.enable()

1472

1996

1473

1997

# StartChecker - method

1998

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

1474

1999

@dbus.service.method(_interface)

1475

2000

def StartChecker(self):

1476

2001

"D-Bus method"

1477

2002

self.start_checker()

1478

2003

1479

2004

# Disable - method

2005

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

1480

2006

@dbus.service.method(_interface)

1481

2007

def Disable(self):

1482

2008

"D-Bus method"

1483

2009

self.disable()

1484

2010

1485

2011

# StopChecker - method

2012

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

1486

2013

@dbus.service.method(_interface)

1487

2014

def StopChecker(self):

1488

2015

self.stop_checker()

1489

1490

## Properties

1491

2016

2017

# Properties

2018

1492

2019

# ApprovalPending - property

1493

2020

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

1494

2021

def ApprovalPending_dbus_property(self):

1495

2022

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

1496

2023

1497

2024

# ApprovedByDefault - property

1498

2025

@dbus_service_property(_interface,

1499

2026

signature="b",

1502

2029

if value is None: # get

1503

2030

return dbus.Boolean(self.approved_by_default)

1504

2031

self.approved_by_default = bool(value)

1505

2032

1506

2033

# ApprovalDelay - property

1507

2034

@dbus_service_property(_interface,

1508

2035

signature="t",

1512

2039

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

1513

2040

* 1000)

1514

2041

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

1515

2042

1516

2043

# ApprovalDuration - property

1517

2044

@dbus_service_property(_interface,

1518

2045

signature="t",

1522

2049

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

1523

2050

* 1000)

1524

2051

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

1525

2052

1526

2053

# Name - property

2054

@dbus_annotations(

2055

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

1527

2056

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

1528

2057

def Name_dbus_property(self):

1529

2058

return dbus.String(self.name)

1530

2059

2060

# KeyID - property

2061

@dbus_annotations(

2062

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

2063

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

2064

def KeyID_dbus_property(self):

2065

return dbus.String(self.key_id)

2066

1531

2067

# Fingerprint - property

2068

@dbus_annotations(

2069

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

1532

2070

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

1533

2071

def Fingerprint_dbus_property(self):

1534

2072

return dbus.String(self.fingerprint)

1535

2073

1536

2074

# Host - property

1537

2075

@dbus_service_property(_interface,

1538

2076

signature="s",

1541

2079

if value is None: # get

1542

2080

return dbus.String(self.host)

1543

2081

self.host = str(value)

1544

2082

1545

2083

# Created - property

2084

@dbus_annotations(

2085

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

1546

2086

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

1547

2087

def Created_dbus_property(self):

1548

2088

return datetime_to_dbus(self.created)

1549

2089

1550

2090

# LastEnabled - property

1551

2091

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

1552

2092

def LastEnabled_dbus_property(self):

1553

2093

return datetime_to_dbus(self.last_enabled)

1554

2094

1555

2095

# Enabled - property

1556

2096

@dbus_service_property(_interface,

1557

2097

signature="b",

1563

2103

self.enable()

1564

2104

else:

1565

2105

self.disable()

1566

2106

1567

2107

# LastCheckedOK - property

1568

2108

@dbus_service_property(_interface,

1569

2109

signature="s",

1573

2113

self.checked_ok()

1574

2114

return

1575

2115

return datetime_to_dbus(self.last_checked_ok)

1576

2116

1577

2117

# LastCheckerStatus - property

1578

2118

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

1579

2119

def LastCheckerStatus_dbus_property(self):

1580

2120

return dbus.Int16(self.last_checker_status)

1581

2121

1582

2122

# Expires - property

1583

2123

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

1584

2124

def Expires_dbus_property(self):

1585

2125

return datetime_to_dbus(self.expires)

1586

2126

1587

2127

# LastApprovalRequest - property

1588

2128

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

1589

2129

def LastApprovalRequest_dbus_property(self):

1590

2130

return datetime_to_dbus(self.last_approval_request)

1591

2131

1592

2132

# Timeout - property

1593

2133

@dbus_service_property(_interface,

1594

2134

signature="t",

1609

2149

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

1610

2150

is None):

1611

2151

return

1612

gobject.source_remove(self.disable_initiator_tag)

1613

self.disable_initiator_tag = gobject.timeout_add(

2152

GLib.source_remove(self.disable_initiator_tag)

2153

self.disable_initiator_tag = GLib.timeout_add(

1614

2154

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

1615

2155

self.disable)

1616

2156

1617

2157

# ExtendedTimeout - property

1618

2158

@dbus_service_property(_interface,

1619

2159

signature="t",

1623

2163

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

1624

2164

* 1000)

1625

2165

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

1626

2166

1627

2167

# Interval - property

1628

2168

@dbus_service_property(_interface,

1629

2169

signature="t",

1636

2176

return

1637

2177

if self.enabled:

1638

2178

# Reschedule checker run

1639

gobject.source_remove(self.checker_initiator_tag)

1640

self.checker_initiator_tag = gobject.timeout_add(

2179

GLib.source_remove(self.checker_initiator_tag)

2180

self.checker_initiator_tag = GLib.timeout_add(

1641

2181

value, self.start_checker)

1642

self.start_checker() # Start one now, too

1643

2182

self.start_checker() # Start one now, too

2183

1644

2184

# Checker - property

1645

2185

@dbus_service_property(_interface,

1646

2186

signature="s",

1649

2189

if value is None: # get

1650

2190

return dbus.String(self.checker_command)

1651

2191

self.checker_command = str(value)

1652

2192

1653

2193

# CheckerRunning - property

1654

2194

@dbus_service_property(_interface,

1655

2195

signature="b",

1661

2201

self.start_checker()

1662

2202

else:

1663

2203

self.stop_checker()

1664

2204

1665

2205

# ObjectPath - property

2206

@dbus_annotations(

2207

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

2208

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

1666

2209

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

1667

2210

def ObjectPath_dbus_property(self):

1668

return self.dbus_object_path # is already a dbus.ObjectPath

1669

2211

return self.dbus_object_path # is already a dbus.ObjectPath

2212

1670

2213

# Secret = property

2214

@dbus_annotations(

2215

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

2216

"invalidates"})

1671

2217

@dbus_service_property(_interface,

1672

2218

signature="ay",

1673

2219

access="write",

1674

2220

byte_arrays=True)

1675

2221

def Secret_dbus_property(self, value):

1676

2222

self.secret = bytes(value)

1677

2223

1678

2224

del _interface

1679

2225

1680

2226

1681

class ProxyClient(object):

1682

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

2227

class ProxyClient:

2228

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

1683

2229

self._pipe = child_pipe

1684

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

2230

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

1685

2231

if not self._pipe.recv():

1686

raise KeyError(fpr)

1687

2232

raise KeyError(key_id or fpr)

2233

1688

2234

def __getattribute__(self, name):

1689

2235

if name == '_pipe':

1690

2236

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

1693

2239

if data[0] == 'data':

1694

2240

return data[1]

1695

2241

if data[0] == 'function':

1696

2242

1697

2243

def func(*args, **kwargs):

1698

2244

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

1699

2245

return self._pipe.recv()[1]

1700

2246

1701

2247

return func

1702

2248

1703

2249

def __setattr__(self, name, value):

1704

2250

if name == '_pipe':

1705

2251

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

1708

2254

1709

2255

class ClientHandler(socketserver.BaseRequestHandler, object):

1710

2256

"""A class to handle client connections.

1711

2257

1712

2258

Instantiated once for each connection to handle it.

1713

2259

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

1714

2260

1715

2261

def handle(self):

1716

2262

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

1717

2263

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

1718

2264

str(self.client_address))

1719

2265

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

1720

2266

self.server.child_pipe.fileno())

1721

1722

session = gnutls.connection.ClientSession(

1723

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

1724

1725

# Note: gnutls.connection.X509Credentials is really a

1726

# generic GnuTLS certificate credentials object so long as

1727

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

1728

# here despite using OpenPGP certificates.

1729

1730

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

1731

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

1732

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

1733

# "+DHE-DSS"))

2267

2268

session = gnutls.ClientSession(self.request)

2269

2270

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

2271

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

2272

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

2273

# "+DHE-DSS"))

1734

2274

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

1735

2275

priority = self.server.gnutls_priority

1736

2276

if priority is None:

1737

2277

priority = "NORMAL"

1738

gnutls.library.functions.gnutls_priority_set_direct(

1739

session._c_object, priority, None)

1740

2278

gnutls.priority_set_direct(session._c_object,

2279

priority.encode("utf-8"),

2280

None)

2281

1741

2282

# Start communication using the Mandos protocol

1742

2283

# Get protocol number

1743

2284

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

1748

2289

except (ValueError, IndexError, RuntimeError) as error:

1749

2290

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

1750

2291

return

1751

2292

1752

2293

# Start GnuTLS connection

1753

2294

try:

1754

2295

session.handshake()

1755

except gnutls.errors.GNUTLSError as error:

2296

except gnutls.Error as error:

1756

2297

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

1757

2298

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

1758

2299

# established. Just abandon the request.

1759

2300

return

1760

2301

logger.debug("Handshake succeeded")

1761

2302

1762

2303

approval_required = False

1763

2304

try:

1764

try:

1765

fpr = self.fingerprint(

1766

self.peer_certificate(session))

1767

except (TypeError,

1768

gnutls.errors.GNUTLSError) as error:

1769

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

1770

return

1771

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

1772

1773

try:

1774

client = ProxyClient(child_pipe, fpr,

2305

if gnutls.has_rawpk:

2306

fpr = b""

2307

try:

2308

key_id = self.key_id(

2309

self.peer_certificate(session))

2310

except (TypeError, gnutls.Error) as error:

2311

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

2312

return

2313

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

2314

2315

else:

2316

key_id = b""

2317

try:

2318

fpr = self.fingerprint(

2319

self.peer_certificate(session))

2320

except (TypeError, gnutls.Error) as error:

2321

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

2322

return

2323

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

2324

2325

try:

2326

client = ProxyClient(child_pipe, key_id, fpr,

1775

2327

self.client_address)

1776

2328

except KeyError:

1777

2329

return

1778

2330

1779

2331

if client.approval_delay:

1780

2332

delay = client.approval_delay

1781

2333

client.approvals_pending += 1

1782

2334

approval_required = True

1783

2335

1784

2336

while True:

1785

2337

if not client.enabled:

1786

2338

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

1789

2341

# Emit D-Bus signal

1790

2342

client.Rejected("Disabled")

1791

2343

return

1792

2344

1793

2345

if client.approved or not client.approval_delay:

1794

#We are approved or approval is disabled

2346

# We are approved or approval is disabled

1795

2347

break

1796

2348

elif client.approved is None:

1797

2349

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

1808

2360

# Emit D-Bus signal

1809

2361

client.Rejected("Denied")

1810

2362

return

1811

1812

#wait until timeout or approved

2363

2364

# wait until timeout or approved

1813

2365

time = datetime.datetime.now()

1814

2366

client.changedstate.acquire()

1815

2367

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

1828

2380

break

1829

2381

else:

1830

2382

delay -= time2 - time

1831

1832

sent_size = 0

1833

while sent_size < len(client.secret):

1834

try:

1835

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

1836

except gnutls.errors.GNUTLSError as error:

1837

logger.warning("gnutls send failed",

1838

exc_info=error)

1839

return

1840

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

1841

len(client.secret) - (sent_size

1842

+ sent))

1843

sent_size += sent

1844

2383

2384

try:

2385

session.send(client.secret)

2386

except gnutls.Error as error:

2387

logger.warning("gnutls send failed",

2388

exc_info=error)

2389

return

2390

1845

2391

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

1846

2392

# bump the timeout using extended_timeout

1847

2393

client.bump_timeout(client.extended_timeout)

1848

2394

if self.server.use_dbus:

1849

2395

# Emit D-Bus signal

1850

2396

client.GotSecret()

1851

2397

1852

2398

finally:

1853

2399

if approval_required:

1854

2400

client.approvals_pending -= 1

1855

2401

try:

1856

2402

session.bye()

1857

except gnutls.errors.GNUTLSError as error:

2403

except gnutls.Error as error:

1858

2404

logger.warning("GnuTLS bye failed",

1859

2405

exc_info=error)

1860

2406

1861

2407

@staticmethod

1862

2408

def peer_certificate(session):

1863

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

1864

# If not an OpenPGP certificate...

1865

if (gnutls.library.functions.gnutls_certificate_type_get(

1866

session._c_object)

1867

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

1868

# ...do the normal thing

1869

return session.peer_certificate

2409

"Return the peer's certificate as a bytestring"

2410

try:

2411

cert_type = gnutls.certificate_type_get2(session._c_object,

2412

gnutls.CTYPE_PEERS)

2413

except AttributeError:

2414

cert_type = gnutls.certificate_type_get(session._c_object)

2415

if gnutls.has_rawpk:

2416

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2417

else:

2418

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2419

# If not a valid certificate type...

2420

if cert_type not in valid_cert_types:

2421

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

2422

valid_cert_types)

2423

# ...return invalid data

2424

return b""

1870

2425

list_size = ctypes.c_uint(1)

1871

cert_list = (gnutls.library.functions

1872

.gnutls_certificate_get_peers

2426

cert_list = (gnutls.certificate_get_peers

1873

2427

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

1874

2428

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

1875

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

1876

" certificate")

2429

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

1877

2430

if list_size.value == 0:

1878

2431

return None

1879

2432

cert = cert_list[0]

1880

2433

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

1881

2434

2435

@staticmethod

2436

def key_id(certificate):

2437

"Convert a certificate bytestring to a hexdigit key ID"

2438

# New GnuTLS "datum" with the public key

2439

datum = gnutls.datum_t(

2440

ctypes.cast(ctypes.c_char_p(certificate),

2441

ctypes.POINTER(ctypes.c_ubyte)),

2442

ctypes.c_uint(len(certificate)))

2443

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

2444

# New empty GnuTLS certificate

2445

pubkey = gnutls.pubkey_t()

2446

gnutls.pubkey_init(ctypes.byref(pubkey))

2447

# Import the raw public key into the certificate

2448

gnutls.pubkey_import(pubkey,

2449

ctypes.byref(datum),

2450

gnutls.X509_FMT_DER)

2451

# New buffer for the key ID

2452

buf = ctypes.create_string_buffer(32)

2453

buf_len = ctypes.c_size_t(len(buf))

2454

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

2455

gnutls.pubkey_get_key_id(pubkey,

2456

gnutls.KEYID_USE_SHA256,

2457

ctypes.cast(ctypes.byref(buf),

2458

ctypes.POINTER(ctypes.c_ubyte)),

2459

ctypes.byref(buf_len))

2460

# Deinit the certificate

2461

gnutls.pubkey_deinit(pubkey)

2462

2463

# Convert the buffer to a Python bytestring

2464

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

2465

# Convert the bytestring to hexadecimal notation

2466

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

2467

return hex_key_id

2468

1882

2469

@staticmethod

1883

2470

def fingerprint(openpgp):

1884

2471

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

1885

2472

# New GnuTLS "datum" with the OpenPGP public key

1886

datum = gnutls.library.types.gnutls_datum_t(

2473

datum = gnutls.datum_t(

1887

2474

ctypes.cast(ctypes.c_char_p(openpgp),

1888

2475

ctypes.POINTER(ctypes.c_ubyte)),

1889

2476

ctypes.c_uint(len(openpgp)))

1890

2477

# New empty GnuTLS certificate

1891

crt = gnutls.library.types.gnutls_openpgp_crt_t()

1892

gnutls.library.functions.gnutls_openpgp_crt_init(

1893

ctypes.byref(crt))

2478

crt = gnutls.openpgp_crt_t()

2479

gnutls.openpgp_crt_init(ctypes.byref(crt))

1894

2480

# Import the OpenPGP public key into the certificate

1895

gnutls.library.functions.gnutls_openpgp_crt_import(

1896

crt, ctypes.byref(datum),

1897

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

2481

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

2482

gnutls.OPENPGP_FMT_RAW)

1898

2483

# Verify the self signature in the key

1899

2484

crtverify = ctypes.c_uint()

1900

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

1901

crt, 0, ctypes.byref(crtverify))

2485

gnutls.openpgp_crt_verify_self(crt, 0,

2486

ctypes.byref(crtverify))

1902

2487

if crtverify.value != 0:

1903

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

1904

raise gnutls.errors.CertificateSecurityError(

1905

"Verify failed")

2488

gnutls.openpgp_crt_deinit(crt)

2489

raise gnutls.CertificateSecurityError(code

2490

=crtverify.value)

1906

2491

# New buffer for the fingerprint

1907

2492

buf = ctypes.create_string_buffer(20)

1908

2493

buf_len = ctypes.c_size_t()

1909

2494

# Get the fingerprint from the certificate into the buffer

1910

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

1911

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

2495

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

2496

ctypes.byref(buf_len))

1912

2497

# Deinit the certificate

1913

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2498

gnutls.openpgp_crt_deinit(crt)

1914

2499

# Convert the buffer to a Python bytestring

1915

2500

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

1916

2501

# Convert the bytestring to hexadecimal notation

1918

2503

return hex_fpr

1919

2504

1920

2505

1921

class MultiprocessingMixIn(object):

2506

class MultiprocessingMixIn:

1922

2507

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

1923

2508

1924

2509

def sub_process_main(self, request, address):

1925

2510

try:

1926

2511

self.finish_request(request, address)

1927

2512

except Exception:

1928

2513

self.handle_error(request, address)

1929

2514

self.close_request(request)

1930

2515

1931

2516

def process_request(self, request, address):

1932

2517

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

1933

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

1934

args = (request, address))

2518

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

2519

args=(request, address))

1935

2520

proc.start()

1936

2521

return proc

1937

2522

1938

2523

1939

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2524

class MultiprocessingMixInWithPipe(MultiprocessingMixIn):

1940

2525

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

1941

2526

1942

2527

def process_request(self, request, client_address):

1943

2528

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

1944

2529

1945

2530

This function creates a new pipe in self.pipe

1946

2531

"""

1947

2532

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1948

2533

1949

2534

proc = MultiprocessingMixIn.process_request(self, request,

1950

2535

client_address)

1951

2536

self.child_pipe.close()

1952

2537

self.add_pipe(parent_pipe, proc)

1953

2538

1954

2539

def add_pipe(self, parent_pipe, proc):

1955

2540

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

1956

2541

raise NotImplementedError()

1957

2542

1958

2543

1959

2544

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1960

socketserver.TCPServer, object):

2545

socketserver.TCPServer):

1961

2546

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

1962

2547

1963

2548

Attributes:

1964

2549

enabled: Boolean; whether this server is activated yet

1965

2550

interface: None or a network interface name (string)

1966

2551

use_ipv6: Boolean; to use IPv6 or not

1967

2552

"""

1968

2553

1969

2554

def __init__(self, server_address, RequestHandlerClass,

1970

2555

interface=None,

1971

2556

use_ipv6=True,

1981

2566

self.socketfd = socketfd

1982

2567

# Save the original socket.socket() function

1983

2568

self.socket_socket = socket.socket

2569

1984

2570

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

1985

#

2571

#

1986

2572

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

1987

2573

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

1988

2574

# patching socket.socket.)

1989

#

2575

#

1990

2576

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

1991

2577

@functools.wraps(socket.socket)

1992

2578

def socket_wrapper(*args, **kwargs):

2004

2590

# socket_wrapper(), if socketfd was set.

2005

2591

socketserver.TCPServer.__init__(self, server_address,

2006

2592

RequestHandlerClass)

2007

2593

2008

2594

def server_bind(self):

2009

2595

"""This overrides the normal server_bind() function

2010

2596

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

2011

2597

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

2598

global SO_BINDTODEVICE

2012

2599

if self.interface is not None:

2013

2600

if SO_BINDTODEVICE is None:

2014

logger.error("SO_BINDTODEVICE does not exist;"

2015

" cannot bind to interface %s",

2016

self.interface)

2017

else:

2018

try:

2019

self.socket.setsockopt(

2020

socket.SOL_SOCKET, SO_BINDTODEVICE,

2021

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

2022

except socket.error as error:

2023

if error.errno == errno.EPERM:

2024

logger.error("No permission to bind to"

2025

" interface %s", self.interface)

2026

elif error.errno == errno.ENOPROTOOPT:

2027

logger.error("SO_BINDTODEVICE not available;"

2028

" cannot bind to interface %s",

2029

self.interface)

2030

elif error.errno == errno.ENODEV:

2031

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

2032

" cannot bind", self.interface)

2033

else:

2034

raise

2601

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

2602

# common enough.

2603

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

2604

SO_BINDTODEVICE = 25

2605

try:

2606

self.socket.setsockopt(

2607

socket.SOL_SOCKET, SO_BINDTODEVICE,

2608

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

2609

except socket.error as error:

2610

if error.errno == errno.EPERM:

2611

logger.error("No permission to bind to"

2612

" interface %s", self.interface)

2613

elif error.errno == errno.ENOPROTOOPT:

2614

logger.error("SO_BINDTODEVICE not available;"

2615

" cannot bind to interface %s",

2616

self.interface)

2617

elif error.errno == errno.ENODEV:

2618

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

2619

" cannot bind", self.interface)

2620

else:

2621

raise

2035

2622

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

2036

2623

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

2624

if self.server_address[1]:

2625

self.allow_reuse_address = True

2037

2626

if not self.server_address[0]:

2038

2627

if self.address_family == socket.AF_INET6:

2039

any_address = "::" # in6addr_any

2628

any_address = "::" # in6addr_any

2040

2629

else:

2041

any_address = "0.0.0.0" # INADDR_ANY

2630

any_address = "0.0.0.0" # INADDR_ANY

2042

2631

self.server_address = (any_address,

2043

2632

self.server_address[1])

2044

2633

elif not self.server_address[1]:

2054

2643

2055

2644

class MandosServer(IPv6_TCPServer):

2056

2645

"""Mandos server.

2057

2646

2058

2647

Attributes:

2059

2648

clients: set of Client objects

2060

2649

gnutls_priority GnuTLS priority string

2061

2650

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

2062

2063

Assumes a gobject.MainLoop event loop.

2651

2652

Assumes a GLib.MainLoop event loop.

2064

2653

"""

2065

2654

2066

2655

def __init__(self, server_address, RequestHandlerClass,

2067

2656

interface=None,

2068

2657

use_ipv6=True,

2078

2667

self.gnutls_priority = gnutls_priority

2079

2668

IPv6_TCPServer.__init__(self, server_address,

2080

2669

RequestHandlerClass,

2081

interface = interface,

2082

use_ipv6 = use_ipv6,

2083

socketfd = socketfd)

2084

2670

interface=interface,

2671

use_ipv6=use_ipv6,

2672

socketfd=socketfd)

2673

2085

2674

def server_activate(self):

2086

2675

if self.enabled:

2087

2676

return socketserver.TCPServer.server_activate(self)

2088

2677

2089

2678

def enable(self):

2090

2679

self.enabled = True

2091

2680

2092

2681

def add_pipe(self, parent_pipe, proc):

2093

2682

# Call "handle_ipc" for both data and EOF events

2094

gobject.io_add_watch(

2095

parent_pipe.fileno(),

2096

gobject.IO_IN | gobject.IO_HUP,

2683

GLib.io_add_watch(

2684

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

2685

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

2097

2686

functools.partial(self.handle_ipc,

2098

parent_pipe = parent_pipe,

2099

proc = proc))

2100

2687

parent_pipe=parent_pipe,

2688

proc=proc))

2689

2101

2690

def handle_ipc(self, source, condition,

2102

2691

parent_pipe=None,

2103

proc = None,

2692

proc=None,

2104

2693

client_object=None):

2105

2694

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

2106

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

2695

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

2107

2696

# Wait for other process to exit

2108

2697

proc.join()

2109

2698

return False

2110

2699

2111

2700

# Read a request from the child

2112

2701

request = parent_pipe.recv()

2113

2702

command = request[0]

2114

2703

2115

2704

if command == 'init':

2116

fpr = request[1]

2117

address = request[2]

2118

2119

for c in self.clients.itervalues():

2120

if c.fingerprint == fpr:

2705

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

2706

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

2707

address = request[3]

2708

2709

for c in self.clients.values():

2710

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2711

continue

2712

if key_id and c.key_id == key_id:

2713

client = c

2714

break

2715

if fpr and c.fingerprint == fpr:

2121

2716

client = c

2122

2717

break

2123

2718

else:

2124

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

2125

"dress: %s", fpr, address)

2719

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

2720

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

2126

2721

if self.use_dbus:

2127

2722

# Emit D-Bus signal

2128

mandos_dbus_service.ClientNotFound(fpr,

2723

mandos_dbus_service.ClientNotFound(key_id or fpr,

2129

2724

address[0])

2130

2725

parent_pipe.send(False)

2131

2726

return False

2132

2133

gobject.io_add_watch(

2134

parent_pipe.fileno(),

2135

gobject.IO_IN | gobject.IO_HUP,

2727

2728

GLib.io_add_watch(

2729

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

2730

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

2136

2731

functools.partial(self.handle_ipc,

2137

parent_pipe = parent_pipe,

2138

proc = proc,

2139

client_object = client))

2732

parent_pipe=parent_pipe,

2733

proc=proc,

2734

client_object=client))

2140

2735

parent_pipe.send(True)

2141

2736

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

2142

2737

# same fileno

2145

2740

funcname = request[1]

2146

2741

args = request[2]

2147

2742

kwargs = request[3]

2148

2743

2149

2744

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

2150

2745

funcname)(*args,

2151

2746

**kwargs)))

2152

2747

2153

2748

if command == 'getattr':

2154

2749

attrname = request[1]

2155

2750

if isinstance(client_object.__getattribute__(attrname),

2158

2753

else:

2159

2754

parent_pipe.send((

2160

2755

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

2161

2756

2162

2757

if command == 'setattr':

2163

2758

attrname = request[1]

2164

2759

value = request[2]

2165

2760

setattr(client_object, attrname, value)

2166

2761

2167

2762

return True

2168

2763

2169

2764

2170

2765

def rfc3339_duration_to_delta(duration):

2171

2766

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

2172

2173

>>> rfc3339_duration_to_delta("P7D")

2174

datetime.timedelta(7)

2175

>>> rfc3339_duration_to_delta("PT60S")

2176

datetime.timedelta(0, 60)

2177

>>> rfc3339_duration_to_delta("PT60M")

2178

datetime.timedelta(0, 3600)

2179

>>> rfc3339_duration_to_delta("PT24H")

2180

datetime.timedelta(1)

2181

>>> rfc3339_duration_to_delta("P1W")

2182

datetime.timedelta(7)

2183

>>> rfc3339_duration_to_delta("PT5M30S")

2184

datetime.timedelta(0, 330)

2185

>>> rfc3339_duration_to_delta("P1DT3M20S")

2186

datetime.timedelta(1, 200)

2767

2768

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

2769

True

2770

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

2771

True

2772

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

2773

True

2774

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

2775

True

2776

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

2777

True

2778

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

2779

True

2780

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

2781

True

2187

2782

"""

2188

2783

2189

2784

# Parsing an RFC 3339 duration with regular expressions is not

2190

2785

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

2191

2786

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

2192

2787

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

2193

2788

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

2194

2789

# avoid excessive use of external libraries.

2195

2790

2196

2791

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

2197

2792

Token = collections.namedtuple("Token", (

2198

2793

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

2231

2826

frozenset((token_year, token_month,

2232

2827

token_day, token_time,

2233

2828

token_week)))

2234

# Define starting values

2235

value = datetime.timedelta() # Value so far

2829

# Define starting values:

2830

# Value so far

2831

value = datetime.timedelta()

2236

2832

found_token = None

2237

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

2238

s = duration # String left to parse

2833

# Following valid tokens

2834

followers = frozenset((token_duration, ))

2835

# String left to parse

2836

s = duration

2239

2837

# Loop until end token is found

2240

2838

while found_token is not token_end:

2241

2839

# Search for any currently valid tokens

2265

2863

2266

2864

def string_to_delta(interval):

2267

2865

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

2268

2269

>>> string_to_delta('7d')

2270

datetime.timedelta(7)

2271

>>> string_to_delta('60s')

2272

datetime.timedelta(0, 60)

2273

>>> string_to_delta('60m')

2274

datetime.timedelta(0, 3600)

2275

>>> string_to_delta('24h')

2276

datetime.timedelta(1)

2277

>>> string_to_delta('1w')

2278

datetime.timedelta(7)

2279

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

2280

datetime.timedelta(0, 330)

2866

2867

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

2868

True

2869

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

2870

True

2871

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

2872

True

2873

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

2874

True

2875

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

2876

True

2877

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

2878

True

2281

2879

"""

2282

2880

2283

2881

try:

2284

2882

return rfc3339_duration_to_delta(interval)

2285

2883

except ValueError:

2286

2884

pass

2287

2885

2288

2886

timevalue = datetime.timedelta(0)

2289

2887

for s in interval.split():

2290

2888

try:

2308

2906

return timevalue

2309

2907

2310

2908

2311

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

2909

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

2312

2910

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

2313

2911

2314

2912

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

2315

2913

if os.fork():

2316

2914

sys.exit()

2334

2932

2335

2933

2336

2934

def main():

2337

2935

2338

2936

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

2339

2937

# Parsing of options, both command line and config file

2340

2938

2341

2939

parser = argparse.ArgumentParser()

2342

2940

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

2343

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

2941

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

2344

2942

help="show version number and exit")

2345

2943

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

2346

2944

help="Bind to interface IF")

2382

2980

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

2383

2981

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

2384

2982

default=None)

2385

2983

2386

2984

options = parser.parse_args()

2387

2388

if options.check:

2389

import doctest

2390

fail_count, test_count = doctest.testmod()

2391

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

2392

2985

2393

2986

# Default values for config file for server-global settings

2394

server_defaults = { "interface": "",

2395

"address": "",

2396

"port": "",

2397

"debug": "False",

2398

"priority":

2399

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

2400

":+SIGN-RSA-SHA224:+SIGN-RSA-RMD160",

2401

"servicename": "Mandos",

2402

"use_dbus": "True",

2403

"use_ipv6": "True",

2404

"debuglevel": "",

2405

"restore": "True",

2406

"socket": "",

2407

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

2408

"foreground": "False",

2409

"zeroconf": "True",

2410

}

2411

2987

if gnutls.has_rawpk:

2988

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

2989

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

2990

else:

2991

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

2992

":+SIGN-DSA-SHA256")

2993

server_defaults = {"interface": "",

2994

"address": "",

2995

"port": "",

2996

"debug": "False",

2997

"priority": priority,

2998

"servicename": "Mandos",

2999

"use_dbus": "True",

3000

"use_ipv6": "True",

3001

"debuglevel": "",

3002

"restore": "True",

3003

"socket": "",

3004

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

3005

"foreground": "False",

3006

"zeroconf": "True",

3007

}

3008

del priority

3009

2412

3010

# Parse config file for server-global settings

2413

server_config = configparser.SafeConfigParser(server_defaults)

3011

server_config = configparser.ConfigParser(server_defaults)

2414

3012

del server_defaults

2415

3013

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

2416

# Convert the SafeConfigParser object to a dict

3014

# Convert the ConfigParser object to a dict

2417

3015

server_settings = server_config.defaults()

2418

3016

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

2419

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

3017

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

3018

"foreground", "zeroconf"):

2420

3019

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

2421

3020

option)

2422

3021

if server_settings["port"]:

2432

3031

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

2433

3032

["socket"])

2434

3033

del server_config

2435

3034

2436

3035

# Override the settings from the config file with command line

2437

3036

# options, if set.

2438

3037

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

2456

3055

if server_settings["debug"]:

2457

3056

server_settings["foreground"] = True

2458

3057

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

2459

3058

2460

3059

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

2461

3060

2462

3061

if (not server_settings["zeroconf"]

2463

3062

and not (server_settings["port"]

2464

3063

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

2465

3064

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

2466

3065

2467

3066

# For convenience

2468

3067

debug = server_settings["debug"]

2469

3068

debuglevel = server_settings["debuglevel"]

2473

3072

stored_state_file)

2474

3073

foreground = server_settings["foreground"]

2475

3074

zeroconf = server_settings["zeroconf"]

2476

3075

2477

3076

if debug:

2478

3077

initlogger(debug, logging.DEBUG)

2479

3078

else:

2482

3081

else:

2483

3082

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

2484

3083

initlogger(debug, level)

2485

3084

2486

3085

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

2487

3086

syslogger.setFormatter(

2488

3087

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

2489

3088

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

2490

3089

server_settings["servicename"])))

2491

3090

2492

3091

# Parse config file with clients

2493

client_config = configparser.SafeConfigParser(Client

2494

.client_defaults)

3092

client_config = configparser.ConfigParser(Client.client_defaults)

2495

3093

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

2496

3094

"clients.conf"))

2497

3095

2498

3096

global mandos_dbus_service

2499

3097

mandos_dbus_service = None

2500

3098

2501

3099

socketfd = None

2502

3100

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

2503

3101

socketfd = server_settings["socket"]

2519

3117

except IOError as e:

2520

3118

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

2521

3119

exc_info=e)

2522

2523

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

3120

3121

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

3122

("mandos", "mandos"),

3123

("nobody", "nogroup")):

2524

3124

try:

2525

3125

uid = pwd.getpwnam(name).pw_uid

2526

gid = pwd.getpwnam(name).pw_gid

3126

gid = pwd.getpwnam(group).pw_gid

2527

3127

break

2528

3128

except KeyError:

2529

3129

continue

2533

3133

try:

2534

3134

os.setgid(gid)

2535

3135

os.setuid(uid)

3136

if debug:

3137

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

3138

gid))

2536

3139

except OSError as error:

3140

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

3141

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

2537

3142

if error.errno != errno.EPERM:

2538

3143

raise

2539

3144

2540

3145

if debug:

2541

3146

# Enable all possible GnuTLS debugging

2542

3147

2543

3148

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

2544

3149

# - GnuTLS manual

2545

gnutls.library.functions.gnutls_global_set_log_level(11)

2546

2547

@gnutls.library.types.gnutls_log_func

3150

gnutls.global_set_log_level(11)

3151

3152

@gnutls.log_func

2548

3153

def debug_gnutls(level, string):

2549

3154

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

2550

2551

gnutls.library.functions.gnutls_global_set_log_function(

2552

debug_gnutls)

2553

3155

3156

gnutls.global_set_log_function(debug_gnutls)

3157

2554

3158

# Redirect stdin so all checkers get /dev/null

2555

3159

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

2556

3160

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

2557

3161

if null > 2:

2558

3162

os.close(null)

2559

3163

2560

3164

# Need to fork before connecting to D-Bus

2561

3165

if not foreground:

2562

3166

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

2563

3167

daemon()

2564

2565

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

2566

# need to inform gobject that threads will be used.

2567

gobject.threads_init()

2568

3168

3169

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

3170

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

3171

# need to inform GLib that threads will be used.

3172

GLib.threads_init()

3173

2569

3174

global main_loop

2570

3175

# From the Avahi example code

2571

3176

DBusGMainLoop(set_as_default=True)

2572

main_loop = gobject.MainLoop()

3177

main_loop = GLib.MainLoop()

2573

3178

bus = dbus.SystemBus()

2574

3179

# End of Avahi example code

2575

3180

if use_dbus:

2588

3193

if zeroconf:

2589

3194

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2590

3195

service = AvahiServiceToSyslog(

2591

name = server_settings["servicename"],

2592

servicetype = "_mandos._tcp",

2593

protocol = protocol,

2594

bus = bus)

3196

name=server_settings["servicename"],

3197

servicetype="_mandos._tcp",

3198

protocol=protocol,

3199

bus=bus)

2595

3200

if server_settings["interface"]:

2596

3201

service.interface = if_nametoindex(

2597

3202

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

2598

3203

2599

3204

global multiprocessing_manager

2600

3205

multiprocessing_manager = multiprocessing.Manager()

2601

3206

2602

3207

client_class = Client

2603

3208

if use_dbus:

2604

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

2605

3209

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

3210

2606

3211

client_settings = Client.config_parser(client_config)

2607

3212

old_client_settings = {}

2608

3213

clients_data = {}

2609

3214

2610

3215

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

2611

3216

global wnull

2612

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

3217

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

2613

3218

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

2614

3219

# mode

2615

3220

if debug or not foreground:

2616

3221

wnull.close()

2617

3222

2618

3223

# Get client data and settings from last running state.

2619

3224

if server_settings["restore"]:

2620

3225

try:

2621

3226

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

2622

clients_data, old_client_settings = pickle.load(

2623

stored_state)

3227

if sys.version_info.major == 2:

3228

clients_data, old_client_settings = pickle.load(

3229

stored_state)

3230

else:

3231

bytes_clients_data, bytes_old_client_settings = (

3232

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

3233

# Fix bytes to strings

3234

# clients_data

3235

# .keys()

3236

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

3237

if isinstance(key, bytes)

3238

else key): value

3239

for key, value in

3240

bytes_clients_data.items()}

3241

del bytes_clients_data

3242

for key in clients_data:

3243

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

3244

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

3245

for k, v in

3246

clients_data[key].items()}

3247

clients_data[key] = value

3248

# .client_structure

3249

value["client_structure"] = [

3250

(s.decode("utf-8")

3251

if isinstance(s, bytes)

3252

else s) for s in

3253

value["client_structure"]]

3254

# .name, .host, and .checker_command

3255

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

3256

if isinstance(value[k], bytes):

3257

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

3258

if "key_id" not in value:

3259

value["key_id"] = ""

3260

elif "fingerprint" not in value:

3261

value["fingerprint"] = ""

3262

# old_client_settings

3263

# .keys()

3264

old_client_settings = {

3265

(key.decode("utf-8")

3266

if isinstance(key, bytes)

3267

else key): value

3268

for key, value in

3269

bytes_old_client_settings.items()}

3270

del bytes_old_client_settings

3271

# .host and .checker_command

3272

for value in old_client_settings.values():

3273

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

3274

if isinstance(value[attribute], bytes):

3275

value[attribute] = (value[attribute]

3276

.decode("utf-8"))

2624

3277

os.remove(stored_state_path)

2625

3278

except IOError as e:

2626

3279

if e.errno == errno.ENOENT:

2634

3287

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

2635

3288

"EOFError:",

2636

3289

exc_info=e)

2637

3290

2638

3291

with PGPEngine() as pgp:

2639

3292

for client_name, client in clients_data.items():

2640

3293

# Skip removed clients

2641

3294

if client_name not in client_settings:

2642

3295

continue

2643

3296

2644

3297

# Decide which value to use after restoring saved state.

2645

3298

# We have three different values: Old config file,

2646

3299

# new config file, and saved state.

2657

3310

client[name] = value

2658

3311

except KeyError:

2659

3312

pass

2660

3313

2661

3314

# Clients who has passed its expire date can still be

2662

3315

# enabled if its last checker was successful. A Client

2663

3316

# whose checker succeeded before we stored its state is

2696

3349

client_name))

2697

3350

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

2698

3351

["secret"])

2699

3352

2700

3353

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

2701

3354

for client_name in (set(old_client_settings)

2702

3355

- set(client_settings)):

2704

3357

for client_name in (set(client_settings)

2705

3358

- set(old_client_settings)):

2706

3359

clients_data[client_name] = client_settings[client_name]

2707

3360

2708

3361

# Create all client objects

2709

3362

for client_name, client in clients_data.items():

2710

3363

tcp_server.clients[client_name] = client_class(

2711

name = client_name,

2712

settings = client,

2713

server_settings = server_settings)

2714

3364

name=client_name,

3365

settings=client,

3366

server_settings=server_settings)

3367

2715

3368

if not tcp_server.clients:

2716

3369

logger.warning("No clients defined")

2717

3370

2718

3371

if not foreground:

2719

3372

if pidfile is not None:

2720

3373

pid = os.getpid()

2726

3379

pidfilename, pid)

2727

3380

del pidfile

2728

3381

del pidfilename

2729

2730

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

2731

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

2732

3382

3383

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

3384

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3385

lambda: main_loop.quit() and False)

3386

2733

3387

if use_dbus:

2734

3388

2735

3389

@alternate_dbus_interfaces(

2736

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

2737

class MandosDBusService(DBusObjectWithProperties):

3390

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

3391

class MandosDBusService(DBusObjectWithObjectManager):

2738

3392

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

2739

3393

2740

3394

def __init__(self):

2741

3395

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

2742

3396

2743

3397

_interface = "se.recompile.Mandos"

2744

2745

@dbus_interface_annotations(_interface)

2746

def _foo(self):

2747

return {

2748

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

2749

"false" }

2750

3398

2751

3399

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

2752

3400

def ClientAdded(self, objpath):

2753

3401

"D-Bus signal"

2754

3402

pass

2755

3403

2756

3404

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

2757

def ClientNotFound(self, fingerprint, address):

3405

def ClientNotFound(self, key_id, address):

2758

3406

"D-Bus signal"

2759

3407

pass

2760

3408

3409

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

3410

"true"})

2761

3411

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

2762

3412

def ClientRemoved(self, objpath, name):

2763

3413

"D-Bus signal"

2764

3414

pass

2765

3415

3416

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

3417

"true"})

2766

3418

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

2767

3419

def GetAllClients(self):

2768

3420

"D-Bus method"

2769

3421

return dbus.Array(c.dbus_object_path for c in

2770

tcp_server.clients.itervalues())

2771

3422

tcp_server.clients.values())

3423

3424

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

3425

"true"})

2772

3426

@dbus.service.method(_interface,

2773

3427

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

2774

3428

def GetAllClientsWithProperties(self):

2775

3429

"D-Bus method"

2776

3430

return dbus.Dictionary(

2777

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

2778

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

3431

{c.dbus_object_path: c.GetAll(

3432

"se.recompile.Mandos.Client")

3433

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

2779

3434

signature="oa{sv}")

2780

3435

2781

3436

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

2782

3437

def RemoveClient(self, object_path):

2783

3438

"D-Bus method"

2784

for c in tcp_server.clients.itervalues():

3439

for c in tcp_server.clients.values():

2785

3440

if c.dbus_object_path == object_path:

2786

3441

del tcp_server.clients[c.name]

2787

3442

c.remove_from_connection()

2788

# Don't signal anything except ClientRemoved

3443

# Don't signal the disabling

2789

3444

c.disable(quiet=True)

2790

# Emit D-Bus signal

2791

self.ClientRemoved(object_path, c.name)

3445

# Emit D-Bus signal for removal

3446

self.client_removed_signal(c)

2792

3447

return

2793

3448

raise KeyError(object_path)

2794

3449

2795

3450

del _interface

2796

3451

3452

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3453

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

3454

def GetManagedObjects(self):

3455

"""D-Bus method"""

3456

return dbus.Dictionary(

3457

{client.dbus_object_path:

3458

dbus.Dictionary(

3459

{interface: client.GetAll(interface)

3460

for interface in

3461

client._get_all_interface_names()})

3462

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

3463

3464

def client_added_signal(self, client):

3465

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

3466

if use_dbus:

3467

# New standard signal

3468

self.InterfacesAdded(

3469

client.dbus_object_path,

3470

dbus.Dictionary(

3471

{interface: client.GetAll(interface)

3472

for interface in

3473

client._get_all_interface_names()}))

3474

# Old signal

3475

self.ClientAdded(client.dbus_object_path)

3476

3477

def client_removed_signal(self, client):

3478

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

3479

if use_dbus:

3480

# New standard signal

3481

self.InterfacesRemoved(

3482

client.dbus_object_path,

3483

client._get_all_interface_names())

3484

# Old signal

3485

self.ClientRemoved(client.dbus_object_path,

3486

client.name)

3487

2797

3488

mandos_dbus_service = MandosDBusService()

2798

3489

3490

# Save modules to variables to exempt the modules from being

3491

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

3492

mp = multiprocessing

3493

wn = wnull

3494

2799

3495

def cleanup():

2800

3496

"Cleanup function; run on exit"

2801

3497

if zeroconf:

2802

3498

service.cleanup()

2803

2804

multiprocessing.active_children()

2805

wnull.close()

3499

3500

mp.active_children()

3501

wn.close()

2806

3502

if not (tcp_server.clients or client_settings):

2807

3503

return

2808

3504

2809

3505

# Store client before exiting. Secrets are encrypted with key

2810

3506

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

2811

3507

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

2812

3508

clients = {}

2813

3509

with PGPEngine() as pgp:

2814

for client in tcp_server.clients.itervalues():

3510

for client in tcp_server.clients.values():

2815

3511

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

2816

3512

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

2817

3513

key)

2818

3514

client_dict = {}

2819

3515

2820

3516

# A list of attributes that can not be pickled

2821

3517

# + secret.

2822

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

2823

"checker", "server_settings" }

3518

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

3519

"checker", "server_settings"}

2824

3520

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

2825

3521

.Object):

2826

3522

exclude.add(name)

2827

3523

2828

3524

client_dict["encrypted_secret"] = (client

2829

3525

.encrypted_secret)

2830

3526

for attr in client.client_structure:

2831

3527

if attr not in exclude:

2832

3528

client_dict[attr] = getattr(client, attr)

2833

3529

2834

3530

clients[client.name] = client_dict

2835

3531

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

2836

3532

2837

3533

try:

2838

3534

with tempfile.NamedTemporaryFile(

2839

3535

mode='wb',

2841

3537

prefix='clients-',

2842

3538

dir=os.path.dirname(stored_state_path),

2843

3539

delete=False) as stored_state:

2844

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

3540

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

3541

protocol=2)

2845

3542

tempname = stored_state.name

2846

3543

os.rename(tempname, stored_state_path)

2847

3544

except (IOError, OSError) as e:

2857

3554

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

2858

3555

exc_info=e)

2859

3556

raise

2860

3557

2861

3558

# Delete all clients, and settings from config

2862

3559

while tcp_server.clients:

2863

3560

name, client = tcp_server.clients.popitem()

2864

3561

if use_dbus:

2865

3562

client.remove_from_connection()

2866

# Don't signal anything except ClientRemoved

3563

# Don't signal the disabling

2867

3564

client.disable(quiet=True)

3565

# Emit D-Bus signal for removal

2868

3566

if use_dbus:

2869

# Emit D-Bus signal

2870

mandos_dbus_service.ClientRemoved(

2871

client.dbus_object_path, client.name)

3567

mandos_dbus_service.client_removed_signal(client)

2872

3568

client_settings.clear()

2873

3569

2874

3570

atexit.register(cleanup)

2875

2876

for client in tcp_server.clients.itervalues():

3571

3572

for client in tcp_server.clients.values():

2877

3573

if use_dbus:

2878

# Emit D-Bus signal

2879

mandos_dbus_service.ClientAdded(client.dbus_object_path)

3574

# Emit D-Bus signal for adding

3575

mandos_dbus_service.client_added_signal(client)

2880

3576

# Need to initiate checking of clients

2881

3577

if client.enabled:

2882

3578

client.init_checker()

2883

3579

2884

3580

tcp_server.enable()

2885

3581

tcp_server.server_activate()

2886

3582

2887

3583

# Find out what port we got

2888

3584

if zeroconf:

2889

3585

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

2894

3590

else: # IPv4

2895

3591

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

2896

3592

*tcp_server.socket.getsockname())

2897

2898

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

2899

3593

3594

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

3595

2900

3596

try:

2901

3597

if zeroconf:

2902

3598

# From the Avahi example code

2907

3603

cleanup()

2908

3604

sys.exit(1)

2909

3605

# End of Avahi example code

2910

2911

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

2912

lambda *args, **kwargs:

2913

(tcp_server.handle_request

2914

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

2915

3606

3607

GLib.io_add_watch(

3608

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

3609

GLib.PRIORITY_DEFAULT, GLib.IO_IN,

3610

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

3611

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

3612

2916

3613

logger.debug("Starting main loop")

2917

3614

main_loop.run()

2918

3615

except AvahiError as error:

2927

3624

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

2928

3625

cleanup()

2929

3626

3627

3628

def should_only_run_tests():

3629

parser = argparse.ArgumentParser(add_help=False)

3630

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

3631

args, unknown_args = parser.parse_known_args()

3632

run_tests = args.check

3633

if run_tests:

3634

# Remove --check argument from sys.argv

3635

sys.argv[1:] = unknown_args

3636

return run_tests

3637

3638

# Add all tests from doctest strings

3639

def load_tests(loader, tests, none):

3640

import doctest

3641

tests.addTests(doctest.DocTestSuite())

3642

return tests

2930

3643

2931

3644

if __name__ == '__main__':

2932

main()

3645

try:

3646

if should_only_run_tests():

3647

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

3648

unittest.main()

3649

else:

3650

main()

3651

finally:

3652

logging.shutdown()