/mandos/release : revision 237.7.333

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#!/usr/bin/python

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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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#

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

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#

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#

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

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# service publisher, downloaded from

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

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

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

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

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#

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#

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# Everything else is

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#

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# This file is part of Mandos.

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#

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

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

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#

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

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

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

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# (at your option) any later version.

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#

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

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# WITHOUT ANY WARRANTY; without even the implied warranty of

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

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

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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

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# GNU General Public License for more details.

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#

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#

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

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

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#

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# along with this program. If not, see

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

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#

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

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#

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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try:

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from future_builtins import *

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except ImportError:

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pass

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from future_builtins import *

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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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try:

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import ConfigParser as configparser

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except ImportError:

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import dbus

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import dbus.service

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from gi.repository import GLib

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try:

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import gobject

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except ImportError:

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from gi.repository import GObject as gobject

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import avahi

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from dbus.mainloop.glib import DBusGMainLoop

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import ctypes

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import ctypes.util

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import xml.dom.minidom

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import inspect

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

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# Try running the C preprocessor:

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try:

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

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"/dev/stdin"],

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stdin=subprocess.PIPE,

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stdout=subprocess.PIPE)

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stdout = cc.communicate(

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

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

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except (OSError, ValueError, IndexError):

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# No value found

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SO_BINDTODEVICE = None

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SO_BINDTODEVICE = None

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if sys.version_info.major == 2:

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str = unicode

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version = "1.8.4"

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version = "1.6.9"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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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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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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class PGPEngine(object):

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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 == "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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'--homedir', self.tempdir,

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'--home', self.tempdir,

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'--force-mdc',

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'--quiet']

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

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

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

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'--quiet',

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'--no-use-agent']

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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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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.

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

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

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return encoded

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def encrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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

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'--passphrase-file',

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passfile.name]

249

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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)

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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)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return ciphertext

257

217

258

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def decrypt(self, data, password):

259

219

passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(

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dir=self.tempdir) as passfile:

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dir = self.tempdir) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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

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'--passphrase-file',

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passfile.name]

267

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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)

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decrypted_plaintext, 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)

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

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if proc.returncode != 0:

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raise PGPError(err)

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return decrypted_plaintext

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# Pretend that we have an Avahi module

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class avahi(object):

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

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

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

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PROTO_INET = 0 # avahi-common/address.h

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PROTO_INET6 = 1 # avahi-common/address.h

284

DBUS_NAME = "org.freedesktop.Avahi"

285

DBUS_INTERFACE_ENTRY_GROUP = DBUS_NAME + ".EntryGroup"

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DBUS_INTERFACE_SERVER = DBUS_NAME + ".Server"

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DBUS_PATH_SERVER = "/"

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@staticmethod

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def string_array_to_txt_array(t):

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

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

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ENTRY_GROUP_ESTABLISHED = 2 # avahi-common/defs.h

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ENTRY_GROUP_COLLISION = 3 # avahi-common/defs.h

295

ENTRY_GROUP_FAILURE = 4 # avahi-common/defs.h

296

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

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SERVER_FAILURE = 4 # avahi-common/defs.h

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302

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237

class AvahiError(Exception):

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238

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

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239

self.value = value

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251

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class AvahiService(object):

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"""An Avahi (Zeroconf) service.

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254

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Attributes:

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

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Used to optionally bind to the specified interface.

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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272

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def __init__(self,

340

interface=avahi.IF_UNSPEC,

341

name=None,

342

servicetype=None,

343

port=None,

344

TXT=None,

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domain="",

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host="",

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max_renames=32768,

348

protocol=avahi.PROTO_UNSPEC,

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bus=None):

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interface = avahi.IF_UNSPEC,

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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 = "",

280

host = "",

281

max_renames = 32768,

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protocol = avahi.PROTO_UNSPEC,

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bus = None):

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self.interface = interface

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self.name = name

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self.type = servicetype

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self, remove=True):

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

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if self.rename_count >= self.max_renames:

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

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self.cleanup()

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os._exit(1)

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391

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def remove(self):

392

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

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if self.entry_group_state_changed_match is not None:

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self.entry_group_state_changed_match = None

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if self.group is not None:

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self.group.Reset()

398

332

399

333

def add(self):

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

401

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self.remove()

418

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dbus.UInt16(self.port),

419

353

avahi.string_array_to_txt_array(self.TXT))

420

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self.group.Commit()

421

355

422

356

def entry_group_state_changed(self, state, error):

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

424

358

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

425

359

426

360

if state == avahi.ENTRY_GROUP_ESTABLISHED:

427

361

logger.debug("Zeroconf service established.")

428

362

elif state == avahi.ENTRY_GROUP_COLLISION:

432

366

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

433

367

str(error))

434

368

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

435

369

436

370

def cleanup(self):

437

371

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

438

372

if self.group is not None:

443

377

pass

444

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self.group = None

445

379

self.remove()

446

380

447

381

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

448

382

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

449

383

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

478

412

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

479

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else:

480

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

481

415

482

416

def activate(self):

483

417

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

484

418

if self.server is None:

495

429

class AvahiServiceToSyslog(AvahiService):

496

430

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

497

431

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

498

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

432

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

499

433

syslogger.setFormatter(logging.Formatter(

500

434

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

501

435

.format(self.name)))

502

436

return ret

503

437

504

505

# Pretend that we have a GnuTLS module

506

class gnutls(object):

507

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

508

509

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

510

if library is None:

511

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

512

_library = ctypes.cdll.LoadLibrary(library)

513

del library

514

515

# Unless otherwise indicated, the constants and types below are

516

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

517

518

# Constants

519

E_SUCCESS = 0

520

E_INTERRUPTED = -52

521

E_AGAIN = -28

522

CRT_OPENPGP = 2

523

CRT_RAWPK = 3

524

CLIENT = 2

525

SHUT_RDWR = 0

526

CRD_CERTIFICATE = 1

527

E_NO_CERTIFICATE_FOUND = -49

528

X509_FMT_DER = 0

529

NO_TICKETS = 1<<10

530

ENABLE_RAWPK = 1<<18

531

CTYPE_PEERS = 3

532

KEYID_USE_SHA256 = 1 # gnutls/x509.h

533

OPENPGP_FMT_RAW = 0 # gnutls/openpgp.h

534

535

# Types

536

class session_int(ctypes.Structure):

537

_fields_ = []

538

session_t = ctypes.POINTER(session_int)

539

540

class certificate_credentials_st(ctypes.Structure):

541

_fields_ = []

542

certificate_credentials_t = ctypes.POINTER(

543

certificate_credentials_st)

544

certificate_type_t = ctypes.c_int

545

546

class datum_t(ctypes.Structure):

547

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

548

('size', ctypes.c_uint)]

549

550

class openpgp_crt_int(ctypes.Structure):

551

_fields_ = []

552

openpgp_crt_t = ctypes.POINTER(openpgp_crt_int)

553

openpgp_crt_fmt_t = ctypes.c_int # gnutls/openpgp.h

554

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

555

credentials_type_t = ctypes.c_int

556

transport_ptr_t = ctypes.c_void_p

557

close_request_t = ctypes.c_int

558

559

# Exceptions

560

class Error(Exception):

561

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

562

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

563

# code is passed, convert it to a string with

564

# gnutls.strerror()

565

self.code = code

566

if message is None and code is not None:

567

message = gnutls.strerror(code)

568

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

569

message, *args)

570

571

class CertificateSecurityError(Error):

572

pass

573

574

# Classes

575

class Credentials(object):

576

def __init__(self):

577

self._c_object = gnutls.certificate_credentials_t()

578

gnutls.certificate_allocate_credentials(

579

ctypes.byref(self._c_object))

580

self.type = gnutls.CRD_CERTIFICATE

581

582

def __del__(self):

583

gnutls.certificate_free_credentials(self._c_object)

584

585

class ClientSession(object):

586

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

587

self._c_object = gnutls.session_t()

588

gnutls_flags = gnutls.CLIENT

589

if gnutls.check_version("3.5.6"):

590

gnutls_flags |= gnutls.NO_TICKETS

591

if gnutls.has_rawpk:

592

gnutls_flags |= gnutls.ENABLE_RAWPK

593

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

594

del gnutls_flags

595

gnutls.set_default_priority(self._c_object)

596

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

597

gnutls.handshake_set_private_extensions(self._c_object,

598

True)

599

self.socket = socket

600

if credentials is None:

601

credentials = gnutls.Credentials()

602

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

603

ctypes.cast(credentials._c_object,

604

ctypes.c_void_p))

605

self.credentials = credentials

606

607

def __del__(self):

608

gnutls.deinit(self._c_object)

609

610

def handshake(self):

611

return gnutls.handshake(self._c_object)

612

613

def send(self, data):

614

data = bytes(data)

615

data_len = len(data)

616

while data_len > 0:

617

data_len -= gnutls.record_send(self._c_object,

618

data[-data_len:],

619

data_len)

620

621

def bye(self):

622

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

623

624

# Error handling functions

625

def _error_code(result):

626

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

627

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

628

if result >= 0:

629

return result

630

if result == gnutls.E_NO_CERTIFICATE_FOUND:

631

raise gnutls.CertificateSecurityError(code=result)

632

raise gnutls.Error(code=result)

633

634

def _retry_on_error(result, func, arguments):

635

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

636

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

637

while result < 0:

638

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

639

return _error_code(result)

640

result = func(*arguments)

641

return result

642

643

# Unless otherwise indicated, the function declarations below are

644

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

645

646

# Functions

647

priority_set_direct = _library.gnutls_priority_set_direct

648

priority_set_direct.argtypes = [session_t, ctypes.c_char_p,

649

ctypes.POINTER(ctypes.c_char_p)]

650

priority_set_direct.restype = _error_code

651

652

init = _library.gnutls_init

653

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

654

init.restype = _error_code

655

656

set_default_priority = _library.gnutls_set_default_priority

657

set_default_priority.argtypes = [session_t]

658

set_default_priority.restype = _error_code

659

660

record_send = _library.gnutls_record_send

661

record_send.argtypes = [session_t, ctypes.c_void_p,

662

ctypes.c_size_t]

663

record_send.restype = ctypes.c_ssize_t

664

record_send.errcheck = _retry_on_error

665

666

certificate_allocate_credentials = (

667

_library.gnutls_certificate_allocate_credentials)

668

certificate_allocate_credentials.argtypes = [

669

ctypes.POINTER(certificate_credentials_t)]

670

certificate_allocate_credentials.restype = _error_code

671

672

certificate_free_credentials = (

673

_library.gnutls_certificate_free_credentials)

674

certificate_free_credentials.argtypes = [

675

certificate_credentials_t]

676

certificate_free_credentials.restype = None

677

678

handshake_set_private_extensions = (

679

_library.gnutls_handshake_set_private_extensions)

680

handshake_set_private_extensions.argtypes = [session_t,

681

ctypes.c_int]

682

handshake_set_private_extensions.restype = None

683

684

credentials_set = _library.gnutls_credentials_set

685

credentials_set.argtypes = [session_t, credentials_type_t,

686

ctypes.c_void_p]

687

credentials_set.restype = _error_code

688

689

strerror = _library.gnutls_strerror

690

strerror.argtypes = [ctypes.c_int]

691

strerror.restype = ctypes.c_char_p

692

693

certificate_type_get = _library.gnutls_certificate_type_get

694

certificate_type_get.argtypes = [session_t]

695

certificate_type_get.restype = _error_code

696

697

certificate_get_peers = _library.gnutls_certificate_get_peers

698

certificate_get_peers.argtypes = [session_t,

699

ctypes.POINTER(ctypes.c_uint)]

700

certificate_get_peers.restype = ctypes.POINTER(datum_t)

701

702

global_set_log_level = _library.gnutls_global_set_log_level

703

global_set_log_level.argtypes = [ctypes.c_int]

704

global_set_log_level.restype = None

705

706

global_set_log_function = _library.gnutls_global_set_log_function

707

global_set_log_function.argtypes = [log_func]

708

global_set_log_function.restype = None

709

710

deinit = _library.gnutls_deinit

711

deinit.argtypes = [session_t]

712

deinit.restype = None

713

714

handshake = _library.gnutls_handshake

715

handshake.argtypes = [session_t]

716

handshake.restype = _error_code

717

handshake.errcheck = _retry_on_error

718

719

transport_set_ptr = _library.gnutls_transport_set_ptr

720

transport_set_ptr.argtypes = [session_t, transport_ptr_t]

721

transport_set_ptr.restype = None

722

723

bye = _library.gnutls_bye

724

bye.argtypes = [session_t, close_request_t]

725

bye.restype = _error_code

726

bye.errcheck = _retry_on_error

727

728

check_version = _library.gnutls_check_version

729

check_version.argtypes = [ctypes.c_char_p]

730

check_version.restype = ctypes.c_char_p

731

732

_need_version = b"3.3.0"

733

if check_version(_need_version) is None:

734

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

735

.format(_need_version))

736

737

_tls_rawpk_version = b"3.6.6"

738

has_rawpk = bool(check_version(_tls_rawpk_version))

739

740

if has_rawpk:

741

# Types

742

class pubkey_st(ctypes.Structure):

743

_fields = []

744

pubkey_t = ctypes.POINTER(pubkey_st)

745

746

x509_crt_fmt_t = ctypes.c_int

747

748

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

749

pubkey_init = _library.gnutls_pubkey_init

750

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

751

pubkey_init.restype = _error_code

752

753

pubkey_import = _library.gnutls_pubkey_import

754

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

755

x509_crt_fmt_t]

756

pubkey_import.restype = _error_code

757

758

pubkey_get_key_id = _library.gnutls_pubkey_get_key_id

759

pubkey_get_key_id.argtypes = [pubkey_t, ctypes.c_int,

760

ctypes.POINTER(ctypes.c_ubyte),

761

ctypes.POINTER(ctypes.c_size_t)]

762

pubkey_get_key_id.restype = _error_code

763

764

pubkey_deinit = _library.gnutls_pubkey_deinit

765

pubkey_deinit.argtypes = [pubkey_t]

766

pubkey_deinit.restype = None

767

else:

768

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

769

770

openpgp_crt_init = _library.gnutls_openpgp_crt_init

771

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

772

openpgp_crt_init.restype = _error_code

773

774

openpgp_crt_import = _library.gnutls_openpgp_crt_import

775

openpgp_crt_import.argtypes = [openpgp_crt_t,

776

ctypes.POINTER(datum_t),

777

openpgp_crt_fmt_t]

778

openpgp_crt_import.restype = _error_code

779

780

openpgp_crt_verify_self = _library.gnutls_openpgp_crt_verify_self

781

openpgp_crt_verify_self.argtypes = [openpgp_crt_t, ctypes.c_uint,

782

ctypes.POINTER(ctypes.c_uint)]

783

openpgp_crt_verify_self.restype = _error_code

784

785

openpgp_crt_deinit = _library.gnutls_openpgp_crt_deinit

786

openpgp_crt_deinit.argtypes = [openpgp_crt_t]

787

openpgp_crt_deinit.restype = None

788

789

openpgp_crt_get_fingerprint = (

790

_library.gnutls_openpgp_crt_get_fingerprint)

791

openpgp_crt_get_fingerprint.argtypes = [openpgp_crt_t,

792

ctypes.c_void_p,

793

ctypes.POINTER(

794

ctypes.c_size_t)]

795

openpgp_crt_get_fingerprint.restype = _error_code

796

797

if check_version("3.6.4"):

798

certificate_type_get2 = _library.gnutls_certificate_type_get2

799

certificate_type_get2.argtypes = [session_t, ctypes.c_int]

800

certificate_type_get2.restype = _error_code

801

802

# Remove non-public functions

803

del _error_code, _retry_on_error

804

805

806

438

def call_pipe(connection, # : multiprocessing.Connection

807

439

func, *args, **kwargs):

808

440

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

809

441

810

442

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

811

443

return value on the provided multiprocessing.Connection.

812

444

"""

813

445

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

814

446

connection.close()

815

447

816

817

448

class Client(object):

818

449

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

819

450

820

451

Attributes:

821

452

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

822

453

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

824

455

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

825

456

to see if the client lives.

826

457

'None' if no process is running.

827

checker_callback_tag: a GLib event source tag, or None

458

checker_callback_tag: a gobject event source tag, or None

828

459

checker_command: string; External command which is run to check

829

460

if client lives. %() expansions are done at

830

461

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

831

462

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

832

checker_initiator_tag: a GLib event source tag, or None

463

checker_initiator_tag: a gobject event source tag, or None

833

464

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

834

465

client_structure: Object describing what attributes a client has

835

466

and is used for storing the client at exit

836

467

current_checker_command: string; current running checker_command

837

disable_initiator_tag: a GLib event source tag, or None

468

disable_initiator_tag: a gobject event source tag, or None

838

469

enabled: bool()

839

470

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

840

uniquely identify an OpenPGP client

841

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

842

a client using raw public keys

471

uniquely identify the client

843

472

host: string; available for use by the checker command

844

473

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

845

474

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

861

490

disabled, or None

862

491

server_settings: The server_settings dict from main()

863

492

"""

864

493

865

494

runtime_expansions = ("approval_delay", "approval_duration",

866

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

495

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

867

496

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

868

497

"last_approval_request", "last_checked_ok",

869

498

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

878

507

"approved_by_default": "True",

879

508

"enabled": "True",

880

509

}

881

510

882

511

@staticmethod

883

512

def config_parser(config):

884

513

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

891

520

for client_name in config.sections():

892

521

section = dict(config.items(client_name))

893

522

client = settings[client_name] = {}

894

523

895

524

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

896

525

# Reformat values from string types to Python types

897

526

client["approved_by_default"] = config.getboolean(

898

527

client_name, "approved_by_default")

899

528

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

900

529

"enabled")

901

902

# Uppercase and remove spaces from key_id and fingerprint

903

# for later comparison purposes with return value from the

904

# key_id() and fingerprint() functions

905

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

906

.replace(" ", ""))

530

531

# Uppercase and remove spaces from fingerprint for later

532

# comparison purposes with return value from the

533

# fingerprint() function

907

534

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

908

535

.replace(" ", ""))

909

536

if "secret" in section:

910

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

911

.encode("utf-8"),

912

"base64")

537

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

913

538

elif "secfile" in section:

914

539

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

915

540

(section["secfile"])),

930

555

client["last_approval_request"] = None

931

556

client["last_checked_ok"] = None

932

557

client["last_checker_status"] = -2

933

558

934

559

return settings

935

936

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

560

561

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

937

562

self.name = name

938

563

if server_settings is None:

939

564

server_settings = {}

941

566

# adding all client settings

942

567

for setting, value in settings.items():

943

568

setattr(self, setting, value)

944

569

945

570

if self.enabled:

946

571

if not hasattr(self, "last_enabled"):

947

572

self.last_enabled = datetime.datetime.utcnow()

951

576

else:

952

577

self.last_enabled = None

953

578

self.expires = None

954

579

955

580

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

956

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

957

581

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

958

582

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

959

583

datetime.datetime.utcnow())

960

584

961

585

# attributes specific for this server instance

962

586

self.checker = None

963

587

self.checker_initiator_tag = None

969

593

self.changedstate = multiprocessing_manager.Condition(

970

594

multiprocessing_manager.Lock())

971

595

self.client_structure = [attr

972

for attr in self.__dict__.keys()

596

for attr in self.__dict__.iterkeys()

973

597

if not attr.startswith("_")]

974

598

self.client_structure.append("client_structure")

975

599

976

600

for name, t in inspect.getmembers(

977

601

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

978

602

if not name.startswith("_"):

979

603

self.client_structure.append(name)

980

604

981

605

# Send notice to process children that client state has changed

982

606

def send_changedstate(self):

983

607

with self.changedstate:

984

608

self.changedstate.notify_all()

985

609

986

610

def enable(self):

987

611

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

988

612

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

993

617

self.last_enabled = datetime.datetime.utcnow()

994

618

self.init_checker()

995

619

self.send_changedstate()

996

620

997

621

def disable(self, quiet=True):

998

622

"""Disable this client."""

999

623

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

1001

625

if not quiet:

1002

626

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

1003

627

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

1004

GLib.source_remove(self.disable_initiator_tag)

628

gobject.source_remove(self.disable_initiator_tag)

1005

629

self.disable_initiator_tag = None

1006

630

self.expires = None

1007

631

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

1008

GLib.source_remove(self.checker_initiator_tag)

632

gobject.source_remove(self.checker_initiator_tag)

1009

633

self.checker_initiator_tag = None

1010

634

self.stop_checker()

1011

635

self.enabled = False

1012

636

if not quiet:

1013

637

self.send_changedstate()

1014

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

638

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

1015

639

return False

1016

640

1017

641

def __del__(self):

1018

642

self.disable()

1019

643

1020

644

def init_checker(self):

1021

645

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

1022

646

# and every interval from then on.

1023

647

if self.checker_initiator_tag is not None:

1024

GLib.source_remove(self.checker_initiator_tag)

1025

self.checker_initiator_tag = GLib.timeout_add(

648

gobject.source_remove(self.checker_initiator_tag)

649

self.checker_initiator_tag = gobject.timeout_add(

1026

650

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

1027

651

self.start_checker)

1028

652

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

1029

653

if self.disable_initiator_tag is not None:

1030

GLib.source_remove(self.disable_initiator_tag)

1031

self.disable_initiator_tag = GLib.timeout_add(

654

gobject.source_remove(self.disable_initiator_tag)

655

self.disable_initiator_tag = gobject.timeout_add(

1032

656

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

1033

657

# Also start a new checker *right now*.

1034

658

self.start_checker()

1035

659

1036

660

def checker_callback(self, source, condition, connection,

1037

661

command):

1038

662

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

1041

665

# Read return code from connection (see call_pipe)

1042

666

returncode = connection.recv()

1043

667

connection.close()

1044

668

1045

669

if returncode >= 0:

1046

670

self.last_checker_status = returncode

1047

671

self.last_checker_signal = None

1057

681

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

1058

682

vars(self))

1059

683

return False

1060

684

1061

685

def checked_ok(self):

1062

686

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

1063

687

self.last_checked_ok = datetime.datetime.utcnow()

1064

688

self.last_checker_status = 0

1065

689

self.last_checker_signal = None

1066

690

self.bump_timeout()

1067

691

1068

692

def bump_timeout(self, timeout=None):

1069

693

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

1070

694

if timeout is None:

1071

695

timeout = self.timeout

1072

696

if self.disable_initiator_tag is not None:

1073

GLib.source_remove(self.disable_initiator_tag)

697

gobject.source_remove(self.disable_initiator_tag)

1074

698

self.disable_initiator_tag = None

1075

699

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

1076

self.disable_initiator_tag = GLib.timeout_add(

700

self.disable_initiator_tag = gobject.timeout_add(

1077

701

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

1078

702

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

1079

703

1080

704

def need_approval(self):

1081

705

self.last_approval_request = datetime.datetime.utcnow()

1082

706

1083

707

def start_checker(self):

1084

708

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

1085

709

1086

710

If a checker already exists, leave it running and do

1087

711

nothing."""

1088

712

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

1093

717

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

1094

718

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

1095

719

# should be.

1096

720

1097

721

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

1098

722

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

1099

723

self.checker.join()

1103

727

# Escape attributes for the shell

1104

728

escaped_attrs = {

1105

729

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

1106

for attr in self.runtime_expansions}

730

for attr in self.runtime_expansions }

1107

731

try:

1108

732

command = self.checker_command % escaped_attrs

1109

733

except TypeError as error:

1121

745

# The exception is when not debugging but nevertheless

1122

746

# running in the foreground; use the previously

1123

747

# created wnull.

1124

popen_args = {"close_fds": True,

1125

"shell": True,

1126

"cwd": "/"}

748

popen_args = { "close_fds": True,

749

"shell": True,

750

"cwd": "/" }

1127

751

if (not self.server_settings["debug"]

1128

752

and self.server_settings["foreground"]):

1129

753

popen_args.update({"stdout": wnull,

1130

"stderr": wnull})

1131

pipe = multiprocessing.Pipe(duplex=False)

754

"stderr": wnull })

755

pipe = multiprocessing.Pipe(duplex = False)

1132

756

self.checker = multiprocessing.Process(

1133

target=call_pipe,

1134

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

1135

kwargs=popen_args)

757

target = call_pipe,

758

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

759

kwargs = popen_args)

1136

760

self.checker.start()

1137

self.checker_callback_tag = GLib.io_add_watch(

1138

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

761

self.checker_callback_tag = gobject.io_add_watch(

762

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

1139

763

self.checker_callback, pipe[0], command)

1140

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

764

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

1141

765

return True

1142

766

1143

767

def stop_checker(self):

1144

768

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

1145

769

if self.checker_callback_tag:

1146

GLib.source_remove(self.checker_callback_tag)

770

gobject.source_remove(self.checker_callback_tag)

1147

771

self.checker_callback_tag = None

1148

772

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

1149

773

return

1158

782

byte_arrays=False):

1159

783

"""Decorators for marking methods of a DBusObjectWithProperties to

1160

784

become properties on the D-Bus.

1161

785

1162

786

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

1163

787

and with one argument by "Set".

1164

788

1165

789

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

1166

790

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

1167

791

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

1171

795

if byte_arrays and signature != "ay":

1172

796

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

1173

797

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

1174

798

1175

799

def decorator(func):

1176

800

func._dbus_is_property = True

1177

801

func._dbus_interface = dbus_interface

1180

804

func._dbus_name = func.__name__

1181

805

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

1182

806

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

1183

func._dbus_get_args_options = {'byte_arrays': byte_arrays}

807

func._dbus_get_args_options = {'byte_arrays': byte_arrays }

1184

808

return func

1185

809

1186

810

return decorator

1187

811

1188

812

1189

813

def dbus_interface_annotations(dbus_interface):

1190

814

"""Decorator for marking functions returning interface annotations

1191

815

1192

816

Usage:

1193

817

1194

818

@dbus_interface_annotations("org.example.Interface")

1195

819

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

1196

820

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

1197

821

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

1198

822

"false"}

1199

823

"""

1200

824

1201

825

def decorator(func):

1202

826

func._dbus_is_interface = True

1203

827

func._dbus_interface = dbus_interface

1204

828

func._dbus_name = dbus_interface

1205

829

return func

1206

830

1207

831

return decorator

1208

832

1209

833

1210

834

def dbus_annotations(annotations):

1211

835

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

1212

836

Usage:

1213

837

1214

838

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

1215

839

"org.freedesktop.DBus.Property."

1216

840

"EmitsChangedSignal": "false"})

1218

842

access="r")

1219

843

def Property_dbus_property(self):

1220

844

return dbus.Boolean(False)

1221

845

1222

846

See also the DBusObjectWithAnnotations class.

1223

847

"""

1224

848

1225

849

def decorator(func):

1226

850

func._dbus_annotations = annotations

1227

851

return func

1228

852

1229

853

return decorator

1230

854

1231

855

1249

873

1250

874

class DBusObjectWithAnnotations(dbus.service.Object):

1251

875

"""A D-Bus object with annotations.

1252

876

1253

877

Classes inheriting from this can use the dbus_annotations

1254

878

decorator to add annotations to methods or signals.

1255

879

"""

1256

880

1257

881

@staticmethod

1258

882

def _is_dbus_thing(thing):

1259

883

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

1260

884

1261

885

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

1262

886

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

1263

887

"""

1264

888

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

1265

889

False)

1266

890

1267

891

def _get_all_dbus_things(self, thing):

1268

892

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

1269

893

"""

1272

896

for cls in self.__class__.__mro__

1273

897

for name, athing in

1274

898

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

1275

899

1276

900

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1277

out_signature="s",

1278

path_keyword='object_path',

1279

connection_keyword='connection')

901

out_signature = "s",

902

path_keyword = 'object_path',

903

connection_keyword = 'connection')

1280

904

def Introspect(self, object_path, connection):

1281

905

"""Overloading of standard D-Bus method.

1282

906

1283

907

Inserts annotation tags on methods and signals.

1284

908

"""

1285

909

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

1286

910

connection)

1287

911

try:

1288

912

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

1289

913

1290

914

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

1291

915

# Add annotation tags

1292

916

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

1319

943

if_tag.appendChild(ann_tag)

1320

944

# Fix argument name for the Introspect method itself

1321

945

if (if_tag.getAttribute("name")

1322

== dbus.INTROSPECTABLE_IFACE):

946

== dbus.INTROSPECTABLE_IFACE):

1323

947

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

1324

948

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

1325

949

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

1338

962

1339

963

class DBusObjectWithProperties(DBusObjectWithAnnotations):

1340

964

"""A D-Bus object with properties.

1341

965

1342

966

Classes inheriting from this can use the dbus_service_property

1343

967

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

1344

968

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

1345

969

"""

1346

970

1347

971

def _get_dbus_property(self, interface_name, property_name):

1348

972

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

1349

973

property with the specified name and interface.

1354

978

if (value._dbus_name == property_name

1355

979

and value._dbus_interface == interface_name):

1356

980

return value.__get__(self)

1357

981

1358

982

# No such property

1359

983

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

1360

984

self.dbus_object_path, interface_name, property_name))

1361

985

1362

986

@classmethod

1363

987

def _get_all_interface_names(cls):

1364

988

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

1367

991

for x in (inspect.getmro(cls))

1368

992

for attr in dir(x))

1369

993

if name is not None)

1370

994

1371

995

@dbus.service.method(dbus.PROPERTIES_IFACE,

1372

996

in_signature="ss",

1373

997

out_signature="v")

1381

1005

if not hasattr(value, "variant_level"):

1382

1006

return value

1383

1007

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

1384

1008

1385

1009

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

1386

1010

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

1387

1011

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

1399

1023

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

1400

1024

for byte in value))

1401

1025

prop(value)

1402

1026

1403

1027

@dbus.service.method(dbus.PROPERTIES_IFACE,

1404

1028

in_signature="s",

1405

1029

out_signature="a{sv}")

1406

1030

def GetAll(self, interface_name):

1407

1031

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

1408

1032

standard.

1409

1033

1410

1034

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

1411

1035

"""

1412

1036

properties = {}

1423

1047

properties[name] = value

1424

1048

continue

1425

1049

properties[name] = type(value)(

1426

value, variant_level=value.variant_level + 1)

1050

value, variant_level = value.variant_level + 1)

1427

1051

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

1428

1052

1429

1053

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

1430

1054

def PropertiesChanged(self, interface_name, changed_properties,

1431

1055

invalidated_properties):

1433

1057

standard.

1434

1058

"""

1435

1059

pass

1436

1060

1437

1061

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1438

1062

out_signature="s",

1439

1063

path_keyword='object_path',

1440

1064

connection_keyword='connection')

1441

1065

def Introspect(self, object_path, connection):

1442

1066

"""Overloading of standard D-Bus method.

1443

1067

1444

1068

Inserts property tags and interface annotation tags.

1445

1069

"""

1446

1070

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1448

1072

connection)

1449

1073

try:

1450

1074

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

1451

1075

1452

1076

def make_tag(document, name, prop):

1453

1077

e = document.createElement("property")

1454

1078

e.setAttribute("name", name)

1455

1079

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

1456

1080

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

1457

1081

return e

1458

1082

1459

1083

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

1460

1084

# Add property tags

1461

1085

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

1503

1127

exc_info=error)

1504

1128

return xmlstring

1505

1129

1506

1507

1130

try:

1508

1131

dbus.OBJECT_MANAGER_IFACE

1509

1132

except AttributeError:

1510

1133

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

1511

1134

1512

1513

1135

class DBusObjectWithObjectManager(DBusObjectWithAnnotations):

1514

1136

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

1515

1137

1516

1138

Classes inheriting from this exposes the standard

1517

1139

GetManagedObjects call and the InterfacesAdded and

1518

1140

InterfacesRemoved signals on the standard

1519

1141

"org.freedesktop.DBus.ObjectManager" interface.

1520

1142

1521

1143

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

1522

1144

manually.

1523

1145

"""

1524

1146

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

1525

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

1147

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

1526

1148

def GetManagedObjects(self):

1527

1149

"""This function must be overridden"""

1528

1150

raise NotImplementedError()

1529

1151

1530

1152

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1531

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

1153

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

1532

1154

def InterfacesAdded(self, object_path, interfaces_and_properties):

1533

1155

pass

1534

1535

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

1156

1157

@dbus.service.signal(dbus.OBJECT_MANAGER_IFACE,

1158

signature = "oas")

1536

1159

def InterfacesRemoved(self, object_path, interfaces):

1537

1160

pass

1538

1161

1539

1162

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

1540

out_signature="s",

1541

path_keyword='object_path',

1542

connection_keyword='connection')

1163

out_signature = "s",

1164

path_keyword = 'object_path',

1165

connection_keyword = 'connection')

1543

1166

def Introspect(self, object_path, connection):

1544

1167

"""Overloading of standard D-Bus method.

1545

1168

1546

1169

Override return argument name of GetManagedObjects to be

1547

1170

"objpath_interfaces_and_properties"

1548

1171

"""

1549

xmlstring = DBusObjectWithAnnotations.Introspect(self,

1550

object_path,

1551

connection)

1172

xmlstring = DBusObjectWithAnnotations(self, object_path,

1173

connection)

1552

1174

try:

1553

1175

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

1554

1176

1555

1177

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

1556

1178

# Fix argument name for the GetManagedObjects method

1557

1179

if (if_tag.getAttribute("name")

1558

== dbus.OBJECT_MANAGER_IFACE):

1180

== dbus.OBJECT_MANAGER_IFACE):

1559

1181

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

1560

1182

if (cn.getAttribute("name")

1561

1183

== "GetManagedObjects"):

1571

1193

except (AttributeError, xml.dom.DOMException,

1572

1194

xml.parsers.expat.ExpatError) as error:

1573

1195

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

1574

exc_info=error)

1196

exc_info = error)

1575

1197

return xmlstring

1576

1198

1577

1578

1199

def datetime_to_dbus(dt, variant_level=0):

1579

1200

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

1580

1201

if dt is None:

1581

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

1202

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

1582

1203

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

1583

1204

1584

1205

1587

1208

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

1588

1209

interface names according to the "alt_interface_names" mapping.

1589

1210

Usage:

1590

1211

1591

1212

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

1592

1213

"net.example.AlternateInterface"})

1593

1214

class SampleDBusObject(dbus.service.Object):

1594

1215

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

1595

1216

def SampleDBusMethod():

1596

1217

pass

1597

1218

1598

1219

The above "SampleDBusMethod" on "SampleDBusObject" will be

1599

1220

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

1600

1221

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

1601

1222

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

1602

1223

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

1603

1224

1604

1225

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

1605

1226

(from DBusObjectWithProperties) and interfaces (from the

1606

1227

dbus_interface_annotations decorator).

1607

1228

"""

1608

1229

1609

1230

def wrapper(cls):

1610

1231

for orig_interface_name, alt_interface_name in (

1611

1232

alt_interface_names.items()):

1626

1247

interface_names.add(alt_interface)

1627

1248

# Is this a D-Bus signal?

1628

1249

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

1629

# Extract the original non-method undecorated

1630

# function by black magic

1631

1250

if sys.version_info.major == 2:

1251

# Extract the original non-method undecorated

1252

# function by black magic

1632

1253

nonmethod_func = (dict(

1633

1254

zip(attribute.func_code.co_freevars,

1634

1255

attribute.__closure__))

1635

1256

["func"].cell_contents)

1636

1257

else:

1637

nonmethod_func = (dict(

1638

zip(attribute.__code__.co_freevars,

1639

attribute.__closure__))

1640

["func"].cell_contents)

1258

nonmethod_func = attribute

1641

1259

# Create a new, but exactly alike, function

1642

1260

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

1643

1261

# with the alternate D-Bus interface name

1644

new_function = copy_function(nonmethod_func)

1262

if sys.version_info.major == 2:

1263

new_function = types.FunctionType(

1264

nonmethod_func.func_code,

1265

nonmethod_func.func_globals,

1266

nonmethod_func.func_name,

1267

nonmethod_func.func_defaults,

1268

nonmethod_func.func_closure)

1269

else:

1270

new_function = types.FunctionType(

1271

nonmethod_func.__code__,

1272

nonmethod_func.__globals__,

1273

nonmethod_func.__name__,

1274

nonmethod_func.__defaults__,

1275

nonmethod_func.__closure__)

1645

1276

new_function = (dbus.service.signal(

1646

1277

alt_interface,

1647

1278

attribute._dbus_signature)(new_function))

1651

1282

attribute._dbus_annotations)

1652

1283

except AttributeError:

1653

1284

pass

1654

1655

1285

# Define a creator of a function to call both the

1656

1286

# original and alternate functions, so both the

1657

1287

# original and alternate signals gets sent when

1660

1290

"""This function is a scope container to pass

1661

1291

func1 and func2 to the "call_both" function

1662

1292

outside of its arguments"""

1663

1664

@functools.wraps(func2)

1293

1665

1294

def call_both(*args, **kwargs):

1666

1295

"""This function will emit two D-Bus

1667

1296

signals by calling func1 and func2"""

1668

1297

func1(*args, **kwargs)

1669

1298

func2(*args, **kwargs)

1670

# Make wrapper function look like a D-Bus

1671

# signal

1672

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

1673

if name.startswith("_dbus_"):

1674

setattr(call_both, name, attr)

1675

1299

1676

1300

return call_both

1677

1301

# Create the "call_both" function and add it to

1678

1302

# the class

1688

1312

alt_interface,

1689

1313

attribute._dbus_in_signature,

1690

1314

attribute._dbus_out_signature)

1691

(copy_function(attribute)))

1315

(types.FunctionType(attribute.func_code,

1316

attribute.func_globals,

1317

attribute.func_name,

1318

attribute.func_defaults,

1319

attribute.func_closure)))

1692

1320

# Copy annotations, if any

1693

1321

try:

1694

1322

attr[attrname]._dbus_annotations = dict(

1706

1334

attribute._dbus_access,

1707

1335

attribute._dbus_get_args_options

1708

1336

["byte_arrays"])

1709

(copy_function(attribute)))

1337

(types.FunctionType(

1338

attribute.func_code,

1339

attribute.func_globals,

1340

attribute.func_name,

1341

attribute.func_defaults,

1342

attribute.func_closure)))

1710

1343

# Copy annotations, if any

1711

1344

try:

1712

1345

attr[attrname]._dbus_annotations = dict(

1721

1354

# to the class.

1722

1355

attr[attrname] = (

1723

1356

dbus_interface_annotations(alt_interface)

1724

(copy_function(attribute)))

1357

(types.FunctionType(attribute.func_code,

1358

attribute.func_globals,

1359

attribute.func_name,

1360

attribute.func_defaults,

1361

attribute.func_closure)))

1725

1362

if deprecate:

1726

1363

# Deprecate all alternate interfaces

1727

iname = "_AlternateDBusNames_interface_annotation{}"

1364

iname="_AlternateDBusNames_interface_annotation{}"

1728

1365

for interface_name in interface_names:

1729

1366

1730

1367

@dbus_interface_annotations(interface_name)

1731

1368

def func(self):

1732

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

1733

"true"}

1369

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

1370

"true" }

1734

1371

# Find an unused name

1735

1372

for aname in (iname.format(i)

1736

1373

for i in itertools.count()):

1740

1377

if interface_names:

1741

1378

# Replace the class with a new subclass of it with

1742

1379

# methods, signals, etc. as created above.

1743

if sys.version_info.major == 2:

1744

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

1745

(cls, ), attr)

1746

else:

1747

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

1748

(cls, ), attr)

1380

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

1381

(cls, ), attr)

1749

1382

return cls

1750

1383

1751

1384

return wrapper

1752

1385

1753

1386

1755

1388

"se.bsnet.fukt.Mandos"})

1756

1389

class ClientDBus(Client, DBusObjectWithProperties):

1757

1390

"""A Client class using D-Bus

1758

1391

1759

1392

Attributes:

1760

1393

dbus_object_path: dbus.ObjectPath

1761

1394

bus: dbus.SystemBus()

1762

1395

"""

1763

1396

1764

1397

runtime_expansions = (Client.runtime_expansions

1765

1398

+ ("dbus_object_path", ))

1766

1399

1767

1400

_interface = "se.recompile.Mandos.Client"

1768

1401

1769

1402

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

1770

1771

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

1403

1404

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

1772

1405

self.bus = bus

1773

1406

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

1774

1407

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

1780

1413

"/clients/" + client_object_name)

1781

1414

DBusObjectWithProperties.__init__(self, self.bus,

1782

1415

self.dbus_object_path)

1783

1416

1784

1417

def notifychangeproperty(transform_func, dbus_name,

1785

1418

type_func=lambda x: x,

1786

1419

variant_level=1,

1788

1421

_interface=_interface):

1789

1422

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

1790

1423

its changes to DBus.

1791

1424

1792

1425

transform_fun: Function that takes a value and a variant_level

1793

1426

and transforms it to a D-Bus type.

1794

1427

dbus_name: D-Bus name of the variable

1797

1430

variant_level: D-Bus variant level. Default: 1

1798

1431

"""

1799

1432

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

1800

1433

1801

1434

def setter(self, value):

1802

1435

if hasattr(self, "dbus_object_path"):

1803

1436

if (not hasattr(self, attrname) or

1810

1443

else:

1811

1444

dbus_value = transform_func(

1812

1445

type_func(value),

1813

variant_level=variant_level)

1446

variant_level = variant_level)

1814

1447

self.PropertyChanged(dbus.String(dbus_name),

1815

1448

dbus_value)

1816

1449

self.PropertiesChanged(

1817

1450

_interface,

1818

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

1819

dbus_value}),

1451

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

1452

dbus_value }),

1820

1453

dbus.Array())

1821

1454

setattr(self, attrname, value)

1822

1455

1823

1456

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

1824

1457

1825

1458

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1826

1459

approvals_pending = notifychangeproperty(dbus.Boolean,

1827

1460

"ApprovalPending",

1828

type_func=bool)

1461

type_func = bool)

1829

1462

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

1830

1463

last_enabled = notifychangeproperty(datetime_to_dbus,

1831

1464

"LastEnabled")

1832

1465

checker = notifychangeproperty(

1833

1466

dbus.Boolean, "CheckerRunning",

1834

type_func=lambda checker: checker is not None)

1467

type_func = lambda checker: checker is not None)

1835

1468

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1836

1469

"LastCheckedOK")

1837

1470

last_checker_status = notifychangeproperty(dbus.Int16,

1842

1475

"ApprovedByDefault")

1843

1476

approval_delay = notifychangeproperty(

1844

1477

dbus.UInt64, "ApprovalDelay",

1845

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

1478

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

1846

1479

approval_duration = notifychangeproperty(

1847

1480

dbus.UInt64, "ApprovalDuration",

1848

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

1481

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

1849

1482

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

1850

1483

timeout = notifychangeproperty(

1851

1484

dbus.UInt64, "Timeout",

1852

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

1485

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

1853

1486

extended_timeout = notifychangeproperty(

1854

1487

dbus.UInt64, "ExtendedTimeout",

1855

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

1488

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

1856

1489

interval = notifychangeproperty(

1857

1490

dbus.UInt64, "Interval",

1858

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

1491

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

1859

1492

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

1860

1493

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

1861

1494

invalidate_only=True)

1862

1495

1863

1496

del notifychangeproperty

1864

1497

1865

1498

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

1866

1499

try:

1867

1500

self.remove_from_connection()

1870

1503

if hasattr(DBusObjectWithProperties, "__del__"):

1871

1504

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

1872

1505

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

1873

1506

1874

1507

def checker_callback(self, source, condition,

1875

1508

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

1876

1509

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

1892

1525

| self.last_checker_signal),

1893

1526

dbus.String(command))

1894

1527

return ret

1895

1528

1896

1529

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

1897

1530

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

1898

1531

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

1902

1535

# Emit D-Bus signal

1903

1536

self.CheckerStarted(self.current_checker_command)

1904

1537

return r

1905

1538

1906

1539

def _reset_approved(self):

1907

1540

self.approved = None

1908

1541

return False

1909

1542

1910

1543

def approve(self, value=True):

1911

1544

self.approved = value

1912

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

1913

* 1000), self._reset_approved)

1545

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

1546

* 1000), self._reset_approved)

1914

1547

self.send_changedstate()

1915

1916

# D-Bus methods, signals & properties

1917

1918

# Interfaces

1919

1920

# Signals

1921

1548

1549

## D-Bus methods, signals & properties

1550

1551

## Interfaces

1552

1553

## Signals

1554

1922

1555

# CheckerCompleted - signal

1923

1556

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

1924

1557

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

1925

1558

"D-Bus signal"

1926

1559

pass

1927

1560

1928

1561

# CheckerStarted - signal

1929

1562

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

1930

1563

def CheckerStarted(self, command):

1931

1564

"D-Bus signal"

1932

1565

pass

1933

1566

1934

1567

# PropertyChanged - signal

1935

1568

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

1936

1569

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

1937

1570

def PropertyChanged(self, property, value):

1938

1571

"D-Bus signal"

1939

1572

pass

1940

1573

1941

1574

# GotSecret - signal

1942

1575

@dbus.service.signal(_interface)

1943

1576

def GotSecret(self):

1946

1579

server to mandos-client

1947

1580

"""

1948

1581

pass

1949

1582

1950

1583

# Rejected - signal

1951

1584

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

1952

1585

def Rejected(self, reason):

1953

1586

"D-Bus signal"

1954

1587

pass

1955

1588

1956

1589

# NeedApproval - signal

1957

1590

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

1958

1591

def NeedApproval(self, timeout, default):

1959

1592

"D-Bus signal"

1960

1593

return self.need_approval()

1961

1962

# Methods

1963

1594

1595

## Methods

1596

1964

1597

# Approve - method

1965

1598

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

1966

1599

def Approve(self, value):

1967

1600

self.approve(value)

1968

1601

1969

1602

# CheckedOK - method

1970

1603

@dbus.service.method(_interface)

1971

1604

def CheckedOK(self):

1972

1605

self.checked_ok()

1973

1606

1974

1607

# Enable - method

1975

1608

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

1976

1609

@dbus.service.method(_interface)

1977

1610

def Enable(self):

1978

1611

"D-Bus method"

1979

1612

self.enable()

1980

1613

1981

1614

# StartChecker - method

1982

1615

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

1983

1616

@dbus.service.method(_interface)

1984

1617

def StartChecker(self):

1985

1618

"D-Bus method"

1986

1619

self.start_checker()

1987

1620

1988

1621

# Disable - method

1989

1622

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

1990

1623

@dbus.service.method(_interface)

1991

1624

def Disable(self):

1992

1625

"D-Bus method"

1993

1626

self.disable()

1994

1627

1995

1628

# StopChecker - method

1996

1629

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

1997

1630

@dbus.service.method(_interface)

1998

1631

def StopChecker(self):

1999

1632

self.stop_checker()

2000

2001

# Properties

2002

1633

1634

## Properties

1635

2003

1636

# ApprovalPending - property

2004

1637

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

2005

1638

def ApprovalPending_dbus_property(self):

2006

1639

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

2007

1640

2008

1641

# ApprovedByDefault - property

2009

1642

@dbus_service_property(_interface,

2010

1643

signature="b",

2013

1646

if value is None: # get

2014

1647

return dbus.Boolean(self.approved_by_default)

2015

1648

self.approved_by_default = bool(value)

2016

1649

2017

1650

# ApprovalDelay - property

2018

1651

@dbus_service_property(_interface,

2019

1652

signature="t",

2023

1656

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

2024

1657

* 1000)

2025

1658

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

2026

1659

2027

1660

# ApprovalDuration - property

2028

1661

@dbus_service_property(_interface,

2029

1662

signature="t",

2033

1666

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

2034

1667

* 1000)

2035

1668

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

2036

1669

2037

1670

# Name - property

2038

1671

@dbus_annotations(

2039

1672

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

2040

1673

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

2041

1674

def Name_dbus_property(self):

2042

1675

return dbus.String(self.name)

2043

2044

# KeyID - property

2045

@dbus_annotations(

2046

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

2047

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

2048

def KeyID_dbus_property(self):

2049

return dbus.String(self.key_id)

2050

1676

2051

1677

# Fingerprint - property

2052

1678

@dbus_annotations(

2053

1679

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

2054

1680

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

2055

1681

def Fingerprint_dbus_property(self):

2056

1682

return dbus.String(self.fingerprint)

2057

1683

2058

1684

# Host - property

2059

1685

@dbus_service_property(_interface,

2060

1686

signature="s",

2063

1689

if value is None: # get

2064

1690

return dbus.String(self.host)

2065

1691

self.host = str(value)

2066

1692

2067

1693

# Created - property

2068

1694

@dbus_annotations(

2069

1695

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

2070

1696

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

2071

1697

def Created_dbus_property(self):

2072

1698

return datetime_to_dbus(self.created)

2073

1699

2074

1700

# LastEnabled - property

2075

1701

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

2076

1702

def LastEnabled_dbus_property(self):

2077

1703

return datetime_to_dbus(self.last_enabled)

2078

1704

2079

1705

# Enabled - property

2080

1706

@dbus_service_property(_interface,

2081

1707

signature="b",

2087

1713

self.enable()

2088

1714

else:

2089

1715

self.disable()

2090

1716

2091

1717

# LastCheckedOK - property

2092

1718

@dbus_service_property(_interface,

2093

1719

signature="s",

2097

1723

self.checked_ok()

2098

1724

return

2099

1725

return datetime_to_dbus(self.last_checked_ok)

2100

1726

2101

1727

# LastCheckerStatus - property

2102

1728

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

2103

1729

def LastCheckerStatus_dbus_property(self):

2104

1730

return dbus.Int16(self.last_checker_status)

2105

1731

2106

1732

# Expires - property

2107

1733

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

2108

1734

def Expires_dbus_property(self):

2109

1735

return datetime_to_dbus(self.expires)

2110

1736

2111

1737

# LastApprovalRequest - property

2112

1738

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

2113

1739

def LastApprovalRequest_dbus_property(self):

2114

1740

return datetime_to_dbus(self.last_approval_request)

2115

1741

2116

1742

# Timeout - property

2117

1743

@dbus_service_property(_interface,

2118

1744

signature="t",

2133

1759

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

2134

1760

is None):

2135

1761

return

2136

GLib.source_remove(self.disable_initiator_tag)

2137

self.disable_initiator_tag = GLib.timeout_add(

1762

gobject.source_remove(self.disable_initiator_tag)

1763

self.disable_initiator_tag = gobject.timeout_add(

2138

1764

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

2139

1765

self.disable)

2140

1766

2141

1767

# ExtendedTimeout - property

2142

1768

@dbus_service_property(_interface,

2143

1769

signature="t",

2147

1773

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

2148

1774

* 1000)

2149

1775

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

2150

1776

2151

1777

# Interval - property

2152

1778

@dbus_service_property(_interface,

2153

1779

signature="t",

2160

1786

return

2161

1787

if self.enabled:

2162

1788

# Reschedule checker run

2163

GLib.source_remove(self.checker_initiator_tag)

2164

self.checker_initiator_tag = GLib.timeout_add(

1789

gobject.source_remove(self.checker_initiator_tag)

1790

self.checker_initiator_tag = gobject.timeout_add(

2165

1791

value, self.start_checker)

2166

self.start_checker() # Start one now, too

2167

1792

self.start_checker() # Start one now, too

1793

2168

1794

# Checker - property

2169

1795

@dbus_service_property(_interface,

2170

1796

signature="s",

2173

1799

if value is None: # get

2174

1800

return dbus.String(self.checker_command)

2175

1801

self.checker_command = str(value)

2176

1802

2177

1803

# CheckerRunning - property

2178

1804

@dbus_service_property(_interface,

2179

1805

signature="b",

2185

1811

self.start_checker()

2186

1812

else:

2187

1813

self.stop_checker()

2188

1814

2189

1815

# ObjectPath - property

2190

1816

@dbus_annotations(

2191

1817

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

2192

1818

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

2193

1819

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

2194

1820

def ObjectPath_dbus_property(self):

2195

return self.dbus_object_path # is already a dbus.ObjectPath

2196

1821

return self.dbus_object_path # is already a dbus.ObjectPath

1822

2197

1823

# Secret = property

2198

1824

@dbus_annotations(

2199

1825

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

2204

1830

byte_arrays=True)

2205

1831

def Secret_dbus_property(self, value):

2206

1832

self.secret = bytes(value)

2207

1833

2208

1834

del _interface

2209

1835

2210

1836

2211

1837

class ProxyClient(object):

2212

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

1838

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

2213

1839

self._pipe = child_pipe

2214

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

1840

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

2215

1841

if not self._pipe.recv():

2216

raise KeyError(key_id or fpr)

2217

1842

raise KeyError(fpr)

1843

2218

1844

def __getattribute__(self, name):

2219

1845

if name == '_pipe':

2220

1846

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

2223

1849

if data[0] == 'data':

2224

1850

return data[1]

2225

1851

if data[0] == 'function':

2226

1852

2227

1853

def func(*args, **kwargs):

2228

1854

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

2229

1855

return self._pipe.recv()[1]

2230

1856

2231

1857

return func

2232

1858

2233

1859

def __setattr__(self, name, value):

2234

1860

if name == '_pipe':

2235

1861

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

2238

1864

2239

1865

class ClientHandler(socketserver.BaseRequestHandler, object):

2240

1866

"""A class to handle client connections.

2241

1867

2242

1868

Instantiated once for each connection to handle it.

2243

1869

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

2244

1870

2245

1871

def handle(self):

2246

1872

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

2247

1873

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

2248

1874

str(self.client_address))

2249

1875

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

2250

1876

self.server.child_pipe.fileno())

2251

2252

session = gnutls.ClientSession(self.request)

2253

2254

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

2255

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

2256

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

2257

# "+DHE-DSS"))

1877

1878

session = gnutls.connection.ClientSession(

1879

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

1880

1881

# Note: gnutls.connection.X509Credentials is really a

1882

# generic GnuTLS certificate credentials object so long as

1883

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

1884

# here despite using OpenPGP certificates.

1885

1886

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

1887

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

1888

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

1889

# "+DHE-DSS"))

2258

1890

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

2259

1891

priority = self.server.gnutls_priority

2260

1892

if priority is None:

2261

1893

priority = "NORMAL"

2262

gnutls.priority_set_direct(session._c_object,

2263

priority.encode("utf-8"),

2264

None)

2265

1894

gnutls.library.functions.gnutls_priority_set_direct(

1895

session._c_object, priority, None)

1896

2266

1897

# Start communication using the Mandos protocol

2267

1898

# Get protocol number

2268

1899

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

2273

1904

except (ValueError, IndexError, RuntimeError) as error:

2274

1905

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

2275

1906

return

2276

1907

2277

1908

# Start GnuTLS connection

2278

1909

try:

2279

1910

session.handshake()

2280

except gnutls.Error as error:

1911

except gnutls.errors.GNUTLSError as error:

2281

1912

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

2282

1913

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

2283

1914

# established. Just abandon the request.

2284

1915

return

2285

1916

logger.debug("Handshake succeeded")

2286

1917

2287

1918

approval_required = False

2288

1919

try:

2289

if gnutls.has_rawpk:

2290

fpr = ""

2291

try:

2292

key_id = self.key_id(

2293

self.peer_certificate(session))

2294

except (TypeError, gnutls.Error) as error:

2295

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

2296

return

2297

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

2298

2299

else:

2300

key_id = ""

2301

try:

2302

fpr = self.fingerprint(

2303

self.peer_certificate(session))

2304

except (TypeError, gnutls.Error) as error:

2305

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

2306

return

2307

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

2308

2309

try:

2310

client = ProxyClient(child_pipe, key_id, fpr,

1920

try:

1921

fpr = self.fingerprint(

1922

self.peer_certificate(session))

1923

except (TypeError,

1924

gnutls.errors.GNUTLSError) as error:

1925

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

1926

return

1927

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

1928

1929

try:

1930

client = ProxyClient(child_pipe, fpr,

2311

1931

self.client_address)

2312

1932

except KeyError:

2313

1933

return

2314

1934

2315

1935

if client.approval_delay:

2316

1936

delay = client.approval_delay

2317

1937

client.approvals_pending += 1

2318

1938

approval_required = True

2319

1939

2320

1940

while True:

2321

1941

if not client.enabled:

2322

1942

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

2325

1945

# Emit D-Bus signal

2326

1946

client.Rejected("Disabled")

2327

1947

return

2328

1948

2329

1949

if client.approved or not client.approval_delay:

2330

# We are approved or approval is disabled

1950

#We are approved or approval is disabled

2331

1951

break

2332

1952

elif client.approved is None:

2333

1953

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

2344

1964

# Emit D-Bus signal

2345

1965

client.Rejected("Denied")

2346

1966

return

2347

2348

# wait until timeout or approved

1967

1968

#wait until timeout or approved

2349

1969

time = datetime.datetime.now()

2350

1970

client.changedstate.acquire()

2351

1971

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

2364

1984

break

2365

1985

else:

2366

1986

delay -= time2 - time

2367

2368

try:

2369

session.send(client.secret)

2370

except gnutls.Error as error:

2371

logger.warning("gnutls send failed",

2372

exc_info=error)

2373

return

2374

1987

1988

sent_size = 0

1989

while sent_size < len(client.secret):

1990

try:

1991

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

1992

except gnutls.errors.GNUTLSError as error:

1993

logger.warning("gnutls send failed",

1994

exc_info=error)

1995

return

1996

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

1997

len(client.secret) - (sent_size

1998

+ sent))

1999

sent_size += sent

2000

2375

2001

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

2376

2002

# bump the timeout using extended_timeout

2377

2003

client.bump_timeout(client.extended_timeout)

2378

2004

if self.server.use_dbus:

2379

2005

# Emit D-Bus signal

2380

2006

client.GotSecret()

2381

2007

2382

2008

finally:

2383

2009

if approval_required:

2384

2010

client.approvals_pending -= 1

2385

2011

try:

2386

2012

session.bye()

2387

except gnutls.Error as error:

2013

except gnutls.errors.GNUTLSError as error:

2388

2014

logger.warning("GnuTLS bye failed",

2389

2015

exc_info=error)

2390

2016

2391

2017

@staticmethod

2392

2018

def peer_certificate(session):

2393

"Return the peer's certificate as a bytestring"

2394

try:

2395

cert_type = gnutls.certificate_type_get2(session._c_object,

2396

gnutls.CTYPE_PEERS)

2397

except AttributeError:

2398

cert_type = gnutls.certificate_type_get(session._c_object)

2399

if gnutls.has_rawpk:

2400

valid_cert_types = frozenset((gnutls.CRT_RAWPK,))

2401

else:

2402

valid_cert_types = frozenset((gnutls.CRT_OPENPGP,))

2403

# If not a valid certificate type...

2404

if cert_type not in valid_cert_types:

2405

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

2406

valid_cert_types)

2407

# ...return invalid data

2408

return b""

2019

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

2020

# If not an OpenPGP certificate...

2021

if (gnutls.library.functions.gnutls_certificate_type_get(

2022

session._c_object)

2023

!= gnutls.library.constants.GNUTLS_CRT_OPENPGP):

2024

# ...do the normal thing

2025

return session.peer_certificate

2409

2026

list_size = ctypes.c_uint(1)

2410

cert_list = (gnutls.certificate_get_peers

2027

cert_list = (gnutls.library.functions

2028

.gnutls_certificate_get_peers

2411

2029

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

2412

2030

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

2413

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

2031

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

2032

" certificate")

2414

2033

if list_size.value == 0:

2415

2034

return None

2416

2035

cert = cert_list[0]

2417

2036

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

2418

2419

@staticmethod

2420

def key_id(certificate):

2421

"Convert a certificate bytestring to a hexdigit key ID"

2422

# New GnuTLS "datum" with the public key

2423

datum = gnutls.datum_t(

2424

ctypes.cast(ctypes.c_char_p(certificate),

2425

ctypes.POINTER(ctypes.c_ubyte)),

2426

ctypes.c_uint(len(certificate)))

2427

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

2428

# New empty GnuTLS certificate

2429

pubkey = gnutls.pubkey_t()

2430

gnutls.pubkey_init(ctypes.byref(pubkey))

2431

# Import the raw public key into the certificate

2432

gnutls.pubkey_import(pubkey,

2433

ctypes.byref(datum),

2434

gnutls.X509_FMT_DER)

2435

# New buffer for the key ID

2436

buf = ctypes.create_string_buffer(32)

2437

buf_len = ctypes.c_size_t(len(buf))

2438

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

2439

gnutls.pubkey_get_key_id(pubkey,

2440

gnutls.KEYID_USE_SHA256,

2441

ctypes.cast(ctypes.byref(buf),

2442

ctypes.POINTER(ctypes.c_ubyte)),

2443

ctypes.byref(buf_len))

2444

# Deinit the certificate

2445

gnutls.pubkey_deinit(pubkey)

2446

2447

# Convert the buffer to a Python bytestring

2448

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

2449

# Convert the bytestring to hexadecimal notation

2450

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

2451

return hex_key_id

2452

2037

2453

2038

@staticmethod

2454

2039

def fingerprint(openpgp):

2455

2040

"Convert an OpenPGP bytestring to a hexdigit fingerprint"

2456

2041

# New GnuTLS "datum" with the OpenPGP public key

2457

datum = gnutls.datum_t(

2042

datum = gnutls.library.types.gnutls_datum_t(

2458

2043

ctypes.cast(ctypes.c_char_p(openpgp),

2459

2044

ctypes.POINTER(ctypes.c_ubyte)),

2460

2045

ctypes.c_uint(len(openpgp)))

2461

2046

# New empty GnuTLS certificate

2462

crt = gnutls.openpgp_crt_t()

2463

gnutls.openpgp_crt_init(ctypes.byref(crt))

2047

crt = gnutls.library.types.gnutls_openpgp_crt_t()

2048

gnutls.library.functions.gnutls_openpgp_crt_init(

2049

ctypes.byref(crt))

2464

2050

# Import the OpenPGP public key into the certificate

2465

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

2466

gnutls.OPENPGP_FMT_RAW)

2051

gnutls.library.functions.gnutls_openpgp_crt_import(

2052

crt, ctypes.byref(datum),

2053

gnutls.library.constants.GNUTLS_OPENPGP_FMT_RAW)

2467

2054

# Verify the self signature in the key

2468

2055

crtverify = ctypes.c_uint()

2469

gnutls.openpgp_crt_verify_self(crt, 0,

2470

ctypes.byref(crtverify))

2056

gnutls.library.functions.gnutls_openpgp_crt_verify_self(

2057

crt, 0, ctypes.byref(crtverify))

2471

2058

if crtverify.value != 0:

2472

gnutls.openpgp_crt_deinit(crt)

2473

raise gnutls.CertificateSecurityError(code

2474

=crtverify.value)

2059

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2060

raise gnutls.errors.CertificateSecurityError(

2061

"Verify failed")

2475

2062

# New buffer for the fingerprint

2476

2063

buf = ctypes.create_string_buffer(20)

2477

2064

buf_len = ctypes.c_size_t()

2478

2065

# Get the fingerprint from the certificate into the buffer

2479

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

2480

ctypes.byref(buf_len))

2066

gnutls.library.functions.gnutls_openpgp_crt_get_fingerprint(

2067

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

2481

2068

# Deinit the certificate

2482

gnutls.openpgp_crt_deinit(crt)

2069

gnutls.library.functions.gnutls_openpgp_crt_deinit(crt)

2483

2070

# Convert the buffer to a Python bytestring

2484

2071

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

2485

2072

# Convert the bytestring to hexadecimal notation

2489

2076

2490

2077

class MultiprocessingMixIn(object):

2491

2078

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

2492

2079

2493

2080

def sub_process_main(self, request, address):

2494

2081

try:

2495

2082

self.finish_request(request, address)

2496

2083

except Exception:

2497

2084

self.handle_error(request, address)

2498

2085

self.close_request(request)

2499

2086

2500

2087

def process_request(self, request, address):

2501

2088

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

2502

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

2503

args=(request, address))

2089

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

2090

args = (request, address))

2504

2091

proc.start()

2505

2092

return proc

2506

2093

2507

2094

2508

2095

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

2509

2096

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

2510

2097

2511

2098

def process_request(self, request, client_address):

2512

2099

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

2513

2100

2514

2101

This function creates a new pipe in self.pipe

2515

2102

"""

2516

2103

parent_pipe, self.child_pipe = multiprocessing.Pipe()

2517

2104

2518

2105

proc = MultiprocessingMixIn.process_request(self, request,

2519

2106

client_address)

2520

2107

self.child_pipe.close()

2521

2108

self.add_pipe(parent_pipe, proc)

2522

2109

2523

2110

def add_pipe(self, parent_pipe, proc):

2524

2111

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

2525

2112

raise NotImplementedError()

2528

2115

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

2529

2116

socketserver.TCPServer, object):

2530

2117

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

2531

2118

2532

2119

Attributes:

2533

2120

enabled: Boolean; whether this server is activated yet

2534

2121

interface: None or a network interface name (string)

2535

2122

use_ipv6: Boolean; to use IPv6 or not

2536

2123

"""

2537

2124

2538

2125

def __init__(self, server_address, RequestHandlerClass,

2539

2126

interface=None,

2540

2127

use_ipv6=True,

2550

2137

self.socketfd = socketfd

2551

2138

# Save the original socket.socket() function

2552

2139

self.socket_socket = socket.socket

2553

2554

2140

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

2555

#

2141

#

2556

2142

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

2557

2143

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

2558

2144

# patching socket.socket.)

2559

#

2145

#

2560

2146

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

2561

2147

@functools.wraps(socket.socket)

2562

2148

def socket_wrapper(*args, **kwargs):

2574

2160

# socket_wrapper(), if socketfd was set.

2575

2161

socketserver.TCPServer.__init__(self, server_address,

2576

2162

RequestHandlerClass)

2577

2163

2578

2164

def server_bind(self):

2579

2165

"""This overrides the normal server_bind() function

2580

2166

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

2581

2167

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

2582

global SO_BINDTODEVICE

2583

2168

if self.interface is not None:

2584

2169

if SO_BINDTODEVICE is None:

2585

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

2586

# common enough.

2587

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

2588

SO_BINDTODEVICE = 25

2589

try:

2590

self.socket.setsockopt(

2591

socket.SOL_SOCKET, SO_BINDTODEVICE,

2592

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

2593

except socket.error as error:

2594

if error.errno == errno.EPERM:

2595

logger.error("No permission to bind to"

2596

" interface %s", self.interface)

2597

elif error.errno == errno.ENOPROTOOPT:

2598

logger.error("SO_BINDTODEVICE not available;"

2599

" cannot bind to interface %s",

2600

self.interface)

2601

elif error.errno == errno.ENODEV:

2602

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

2603

" cannot bind", self.interface)

2604

else:

2605

raise

2170

logger.error("SO_BINDTODEVICE does not exist;"

2171

" cannot bind to interface %s",

2172

self.interface)

2173

else:

2174

try:

2175

self.socket.setsockopt(

2176

socket.SOL_SOCKET, SO_BINDTODEVICE,

2177

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

2178

except socket.error as error:

2179

if error.errno == errno.EPERM:

2180

logger.error("No permission to bind to"

2181

" interface %s", self.interface)

2182

elif error.errno == errno.ENOPROTOOPT:

2183

logger.error("SO_BINDTODEVICE not available;"

2184

" cannot bind to interface %s",

2185

self.interface)

2186

elif error.errno == errno.ENODEV:

2187

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

2188

" cannot bind", self.interface)

2189

else:

2190

raise

2606

2191

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

2607

2192

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

2608

2193

if not self.server_address[0]:

2609

2194

if self.address_family == socket.AF_INET6:

2610

any_address = "::" # in6addr_any

2195

any_address = "::" # in6addr_any

2611

2196

else:

2612

any_address = "0.0.0.0" # INADDR_ANY

2197

any_address = "0.0.0.0" # INADDR_ANY

2613

2198

self.server_address = (any_address,

2614

2199

self.server_address[1])

2615

2200

elif not self.server_address[1]:

2625

2210

2626

2211

class MandosServer(IPv6_TCPServer):

2627

2212

"""Mandos server.

2628

2213

2629

2214

Attributes:

2630

2215

clients: set of Client objects

2631

2216

gnutls_priority GnuTLS priority string

2632

2217

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

2633

2634

Assumes a GLib.MainLoop event loop.

2218

2219

Assumes a gobject.MainLoop event loop.

2635

2220

"""

2636

2221

2637

2222

def __init__(self, server_address, RequestHandlerClass,

2638

2223

interface=None,

2639

2224

use_ipv6=True,

2649

2234

self.gnutls_priority = gnutls_priority

2650

2235

IPv6_TCPServer.__init__(self, server_address,

2651

2236

RequestHandlerClass,

2652

interface=interface,

2653

use_ipv6=use_ipv6,

2654

socketfd=socketfd)

2655

2237

interface = interface,

2238

use_ipv6 = use_ipv6,

2239

socketfd = socketfd)

2240

2656

2241

def server_activate(self):

2657

2242

if self.enabled:

2658

2243

return socketserver.TCPServer.server_activate(self)

2659

2244

2660

2245

def enable(self):

2661

2246

self.enabled = True

2662

2247

2663

2248

def add_pipe(self, parent_pipe, proc):

2664

2249

# Call "handle_ipc" for both data and EOF events

2665

GLib.io_add_watch(

2250

gobject.io_add_watch(

2666

2251

parent_pipe.fileno(),

2667

GLib.IO_IN | GLib.IO_HUP,

2252

gobject.IO_IN | gobject.IO_HUP,

2668

2253

functools.partial(self.handle_ipc,

2669

parent_pipe=parent_pipe,

2670

proc=proc))

2671

2254

parent_pipe = parent_pipe,

2255

proc = proc))

2256

2672

2257

def handle_ipc(self, source, condition,

2673

2258

parent_pipe=None,

2674

proc=None,

2259

proc = None,

2675

2260

client_object=None):

2676

2261

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

2677

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

2262

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

2678

2263

# Wait for other process to exit

2679

2264

proc.join()

2680

2265

return False

2681

2266

2682

2267

# Read a request from the child

2683

2268

request = parent_pipe.recv()

2684

2269

command = request[0]

2685

2270

2686

2271

if command == 'init':

2687

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

2688

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

2689

address = request[3]

2690

2691

for c in self.clients.values():

2692

if key_id == "E3B0C44298FC1C149AFBF4C8996FB92427AE41E4649B934CA495991B7852B855":

2693

continue

2694

if key_id and c.key_id == key_id:

2695

client = c

2696

break

2697

if fpr and c.fingerprint == fpr:

2272

fpr = request[1]

2273

address = request[2]

2274

2275

for c in self.clients.itervalues():

2276

if c.fingerprint == fpr:

2698

2277

client = c

2699

2278

break

2700

2279

else:

2701

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

2702

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

2280

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

2281

"dress: %s", fpr, address)

2703

2282

if self.use_dbus:

2704

2283

# Emit D-Bus signal

2705

mandos_dbus_service.ClientNotFound(key_id or fpr,

2284

mandos_dbus_service.ClientNotFound(fpr,

2706

2285

address[0])

2707

2286

parent_pipe.send(False)

2708

2287

return False

2709

2710

GLib.io_add_watch(

2288

2289

gobject.io_add_watch(

2711

2290

parent_pipe.fileno(),

2712

GLib.IO_IN | GLib.IO_HUP,

2291

gobject.IO_IN | gobject.IO_HUP,

2713

2292

functools.partial(self.handle_ipc,

2714

parent_pipe=parent_pipe,

2715

proc=proc,

2716

client_object=client))

2293

parent_pipe = parent_pipe,

2294

proc = proc,

2295

client_object = client))

2717

2296

parent_pipe.send(True)

2718

2297

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

2719

2298

# same fileno

2722

2301

funcname = request[1]

2723

2302

args = request[2]

2724

2303

kwargs = request[3]

2725

2304

2726

2305

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

2727

2306

funcname)(*args,

2728

2307

**kwargs)))

2729

2308

2730

2309

if command == 'getattr':

2731

2310

attrname = request[1]

2732

2311

if isinstance(client_object.__getattribute__(attrname),

2735

2314

else:

2736

2315

parent_pipe.send((

2737

2316

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

2738

2317

2739

2318

if command == 'setattr':

2740

2319

attrname = request[1]

2741

2320

value = request[2]

2742

2321

setattr(client_object, attrname, value)

2743

2322

2744

2323

return True

2745

2324

2746

2325

2747

2326

def rfc3339_duration_to_delta(duration):

2748

2327

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

2749

2328

2750

2329

>>> rfc3339_duration_to_delta("P7D")

2751

2330

datetime.timedelta(7)

2752

2331

>>> rfc3339_duration_to_delta("PT60S")

2762

2341

>>> rfc3339_duration_to_delta("P1DT3M20S")

2763

2342

datetime.timedelta(1, 200)

2764

2343

"""

2765

2344

2766

2345

# Parsing an RFC 3339 duration with regular expressions is not

2767

2346

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

2768

2347

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

2769

2348

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

2770

2349

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

2771

2350

# avoid excessive use of external libraries.

2772

2351

2773

2352

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

2774

2353

Token = collections.namedtuple("Token", (

2775

2354

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

2808

2387

frozenset((token_year, token_month,

2809

2388

token_day, token_time,

2810

2389

token_week)))

2811

# Define starting values:

2812

# Value so far

2813

value = datetime.timedelta()

2390

# Define starting values

2391

value = datetime.timedelta() # Value so far

2814

2392

found_token = None

2815

# Following valid tokens

2816

followers = frozenset((token_duration, ))

2817

# String left to parse

2818

s = duration

2393

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

2394

s = duration # String left to parse

2819

2395

# Loop until end token is found

2820

2396

while found_token is not token_end:

2821

2397

# Search for any currently valid tokens

2845

2421

2846

2422

def string_to_delta(interval):

2847

2423

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

2848

2424

2849

2425

>>> string_to_delta('7d')

2850

2426

datetime.timedelta(7)

2851

2427

>>> string_to_delta('60s')

2859

2435

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

2860

2436

datetime.timedelta(0, 330)

2861

2437

"""

2862

2438

2863

2439

try:

2864

2440

return rfc3339_duration_to_delta(interval)

2865

2441

except ValueError:

2866

2442

pass

2867

2443

2868

2444

timevalue = datetime.timedelta(0)

2869

2445

for s in interval.split():

2870

2446

try:

2888

2464

return timevalue

2889

2465

2890

2466

2891

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

2467

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

2892

2468

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

2893

2469

2894

2470

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

2895

2471

if os.fork():

2896

2472

sys.exit()

2914

2490

2915

2491

2916

2492

def main():

2917

2493

2918

2494

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

2919

2495

# Parsing of options, both command line and config file

2920

2496

2921

2497

parser = argparse.ArgumentParser()

2922

2498

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

2923

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

2499

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

2924

2500

help="show version number and exit")

2925

2501

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

2926

2502

help="Bind to interface IF")

2962

2538

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

2963

2539

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

2964

2540

default=None)

2965

2541

2966

2542

options = parser.parse_args()

2967

2543

2968

2544

if options.check:

2969

2545

import doctest

2970

2546

fail_count, test_count = doctest.testmod()

2971

2547

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

2972

2548

2973

2549

# Default values for config file for server-global settings

2974

if gnutls.has_rawpk:

2975

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

2976

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

2977

else:

2978

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

2979

":+SIGN-DSA-SHA256")

2980

server_defaults = {"interface": "",

2981

"address": "",

2982

"port": "",

2983

"debug": "False",

2984

"priority": priority,

2985

"servicename": "Mandos",

2986

"use_dbus": "True",

2987

"use_ipv6": "True",

2988

"debuglevel": "",

2989

"restore": "True",

2990

"socket": "",

2991

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

2992

"foreground": "False",

2993

"zeroconf": "True",

2994

}

2995

del priority

2996

2550

server_defaults = { "interface": "",

2551

"address": "",

2552

"port": "",

2553

"debug": "False",

2554

"priority":

2555

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

2556

":+SIGN-DSA-SHA256",

2557

"servicename": "Mandos",

2558

"use_dbus": "True",

2559

"use_ipv6": "True",

2560

"debuglevel": "",

2561

"restore": "True",

2562

"socket": "",

2563

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

2564

"foreground": "False",

2565

"zeroconf": "True",

2566

}

2567

2997

2568

# Parse config file for server-global settings

2998

2569

server_config = configparser.SafeConfigParser(server_defaults)

2999

2570

del server_defaults

3001

2572

# Convert the SafeConfigParser object to a dict

3002

2573

server_settings = server_config.defaults()

3003

2574

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

3004

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

3005

"foreground", "zeroconf"):

2575

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

3006

2576

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

3007

2577

option)

3008

2578

if server_settings["port"]:

3018

2588

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

3019

2589

["socket"])

3020

2590

del server_config

3021

2591

3022

2592

# Override the settings from the config file with command line

3023

2593

# options, if set.

3024

2594

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

3042

2612

if server_settings["debug"]:

3043

2613

server_settings["foreground"] = True

3044

2614

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

3045

2615

3046

2616

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

3047

2617

3048

2618

if (not server_settings["zeroconf"]

3049

2619

and not (server_settings["port"]

3050

2620

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

3051

2621

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

3052

2622

3053

2623

# For convenience

3054

2624

debug = server_settings["debug"]

3055

2625

debuglevel = server_settings["debuglevel"]

3059

2629

stored_state_file)

3060

2630

foreground = server_settings["foreground"]

3061

2631

zeroconf = server_settings["zeroconf"]

3062

2632

3063

2633

if debug:

3064

2634

initlogger(debug, logging.DEBUG)

3065

2635

else:

3068

2638

else:

3069

2639

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

3070

2640

initlogger(debug, level)

3071

2641

3072

2642

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

3073

2643

syslogger.setFormatter(

3074

2644

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

3075

2645

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

3076

2646

server_settings["servicename"])))

3077

2647

3078

2648

# Parse config file with clients

3079

2649

client_config = configparser.SafeConfigParser(Client

3080

2650

.client_defaults)

3081

2651

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

3082

2652

"clients.conf"))

3083

2653

3084

2654

global mandos_dbus_service

3085

2655

mandos_dbus_service = None

3086

2656

3087

2657

socketfd = None

3088

2658

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

3089

2659

socketfd = server_settings["socket"]

3105

2675

except IOError as e:

3106

2676

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

3107

2677

exc_info=e)

3108

3109

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

3110

("mandos", "mandos"),

3111

("nobody", "nogroup")):

2678

2679

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

3112

2680

try:

3113

2681

uid = pwd.getpwnam(name).pw_uid

3114

gid = pwd.getpwnam(group).pw_gid

2682

gid = pwd.getpwnam(name).pw_gid

3115

2683

break

3116

2684

except KeyError:

3117

2685

continue

3121

2689

try:

3122

2690

os.setgid(gid)

3123

2691

os.setuid(uid)

3124

if debug:

3125

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

3126

gid))

3127

2692

except OSError as error:

3128

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

3129

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

3130

2693

if error.errno != errno.EPERM:

3131

2694

raise

3132

2695

3133

2696

if debug:

3134

2697

# Enable all possible GnuTLS debugging

3135

2698

3136

2699

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

3137

2700

# - GnuTLS manual

3138

gnutls.global_set_log_level(11)

3139

3140

@gnutls.log_func

2701

gnutls.library.functions.gnutls_global_set_log_level(11)

2702

2703

@gnutls.library.types.gnutls_log_func

3141

2704

def debug_gnutls(level, string):

3142

2705

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

3143

3144

gnutls.global_set_log_function(debug_gnutls)

3145

2706

2707

gnutls.library.functions.gnutls_global_set_log_function(

2708

debug_gnutls)

2709

3146

2710

# Redirect stdin so all checkers get /dev/null

3147

2711

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

3148

2712

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

3149

2713

if null > 2:

3150

2714

os.close(null)

3151

2715

3152

2716

# Need to fork before connecting to D-Bus

3153

2717

if not foreground:

3154

2718

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

3155

2719

daemon()

3156

3157

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

3158

# to inform GLib that threads will be used.

3159

GLib.threads_init()

3160

2720

2721

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

2722

# need to inform gobject that threads will be used.

2723

gobject.threads_init()

2724

3161

2725

global main_loop

3162

2726

# From the Avahi example code

3163

2727

DBusGMainLoop(set_as_default=True)

3164

main_loop = GLib.MainLoop()

2728

main_loop = gobject.MainLoop()

3165

2729

bus = dbus.SystemBus()

3166

2730

# End of Avahi example code

3167

2731

if use_dbus:

3180

2744

if zeroconf:

3181

2745

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

3182

2746

service = AvahiServiceToSyslog(

3183

name=server_settings["servicename"],

3184

servicetype="_mandos._tcp",

3185

protocol=protocol,

3186

bus=bus)

2747

name = server_settings["servicename"],

2748

servicetype = "_mandos._tcp",

2749

protocol = protocol,

2750

bus = bus)

3187

2751

if server_settings["interface"]:

3188

2752

service.interface = if_nametoindex(

3189

2753

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

3190

2754

3191

2755

global multiprocessing_manager

3192

2756

multiprocessing_manager = multiprocessing.Manager()

3193

2757

3194

2758

client_class = Client

3195

2759

if use_dbus:

3196

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

3197

2760

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

2761

3198

2762

client_settings = Client.config_parser(client_config)

3199

2763

old_client_settings = {}

3200

2764

clients_data = {}

3201

2765

3202

2766

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

3203

2767

global wnull

3204

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

2768

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

3205

2769

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

3206

2770

# mode

3207

2771

if debug or not foreground:

3208

2772

wnull.close()

3209

2773

3210

2774

# Get client data and settings from last running state.

3211

2775

if server_settings["restore"]:

3212

2776

try:

3213

2777

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

3214

if sys.version_info.major == 2:

3215

clients_data, old_client_settings = pickle.load(

3216

stored_state)

3217

else:

3218

bytes_clients_data, bytes_old_client_settings = (

3219

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

3220

# Fix bytes to strings

3221

# clients_data

3222

# .keys()

3223

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

3224

if isinstance(key, bytes)

3225

else key): value

3226

for key, value in

3227

bytes_clients_data.items()}

3228

del bytes_clients_data

3229

for key in clients_data:

3230

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

3231

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

3232

for k, v in

3233

clients_data[key].items()}

3234

clients_data[key] = value

3235

# .client_structure

3236

value["client_structure"] = [

3237

(s.decode("utf-8")

3238

if isinstance(s, bytes)

3239

else s) for s in

3240

value["client_structure"]]

3241

# .name & .host

3242

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

3243

if isinstance(value[k], bytes):

3244

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

3245

if not value.has_key("key_id"):

3246

value["key_id"] = ""

3247

elif not value.has_key("fingerprint"):

3248

value["fingerprint"] = ""

3249

# old_client_settings

3250

# .keys()

3251

old_client_settings = {

3252

(key.decode("utf-8")

3253

if isinstance(key, bytes)

3254

else key): value

3255

for key, value in

3256

bytes_old_client_settings.items()}

3257

del bytes_old_client_settings

3258

# .host

3259

for value in old_client_settings.values():

3260

if isinstance(value["host"], bytes):

3261

value["host"] = (value["host"]

3262

.decode("utf-8"))

2778

clients_data, old_client_settings = pickle.load(

2779

stored_state)

3263

2780

os.remove(stored_state_path)

3264

2781

except IOError as e:

3265

2782

if e.errno == errno.ENOENT:

3273

2790

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

3274

2791

"EOFError:",

3275

2792

exc_info=e)

3276

2793

3277

2794

with PGPEngine() as pgp:

3278

2795

for client_name, client in clients_data.items():

3279

2796

# Skip removed clients

3280

2797

if client_name not in client_settings:

3281

2798

continue

3282

2799

3283

2800

# Decide which value to use after restoring saved state.

3284

2801

# We have three different values: Old config file,

3285

2802

# new config file, and saved state.

3296

2813

client[name] = value

3297

2814

except KeyError:

3298

2815

pass

3299

2816

3300

2817

# Clients who has passed its expire date can still be

3301

2818

# enabled if its last checker was successful. A Client

3302

2819

# whose checker succeeded before we stored its state is

3335

2852

client_name))

3336

2853

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

3337

2854

["secret"])

3338

2855

3339

2856

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

3340

2857

for client_name in (set(old_client_settings)

3341

2858

- set(client_settings)):

3343

2860

for client_name in (set(client_settings)

3344

2861

- set(old_client_settings)):

3345

2862

clients_data[client_name] = client_settings[client_name]

3346

2863

3347

2864

# Create all client objects

3348

2865

for client_name, client in clients_data.items():

3349

2866

tcp_server.clients[client_name] = client_class(

3350

name=client_name,

3351

settings=client,

3352

server_settings=server_settings)

3353

2867

name = client_name,

2868

settings = client,

2869

server_settings = server_settings)

2870

3354

2871

if not tcp_server.clients:

3355

2872

logger.warning("No clients defined")

3356

2873

3357

2874

if not foreground:

3358

2875

if pidfile is not None:

3359

2876

pid = os.getpid()

3365

2882

pidfilename, pid)

3366

2883

del pidfile

3367

2884

del pidfilename

3368

3369

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

3370

GLib.unix_signal_add(GLib.PRIORITY_HIGH, termsig,

3371

lambda: main_loop.quit() and False)

3372

2885

2886

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

2887

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

2888

3373

2889

if use_dbus:

3374

2890

3375

2891

@alternate_dbus_interfaces(

3376

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

2892

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

3377

2893

class MandosDBusService(DBusObjectWithObjectManager):

3378

2894

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

3379

2895

3380

2896

def __init__(self):

3381

2897

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

3382

2898

3383

2899

_interface = "se.recompile.Mandos"

3384

2900

3385

2901

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

3386

2902

def ClientAdded(self, objpath):

3387

2903

"D-Bus signal"

3388

2904

pass

3389

2905

3390

2906

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

3391

def ClientNotFound(self, key_id, address):

2907

def ClientNotFound(self, fingerprint, address):

3392

2908

"D-Bus signal"

3393

2909

pass

3394

2910

3395

2911

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

3396

2912

"true"})

3397

2913

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

3398

2914

def ClientRemoved(self, objpath, name):

3399

2915

"D-Bus signal"

3400

2916

pass

3401

2917

3402

2918

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

3403

2919

"true"})

3404

2920

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

3405

2921

def GetAllClients(self):

3406

2922

"D-Bus method"

3407

2923

return dbus.Array(c.dbus_object_path for c in

3408

tcp_server.clients.values())

3409

2924

tcp_server.clients.itervalues())

2925

3410

2926

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

3411

2927

"true"})

3412

2928

@dbus.service.method(_interface,

3414

2930

def GetAllClientsWithProperties(self):

3415

2931

"D-Bus method"

3416

2932

return dbus.Dictionary(

3417

{c.dbus_object_path: c.GetAll(

2933

{ c.dbus_object_path: c.GetAll(

3418

2934

"se.recompile.Mandos.Client")

3419

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

2935

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

3420

2936

signature="oa{sv}")

3421

2937

3422

2938

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

3423

2939

def RemoveClient(self, object_path):

3424

2940

"D-Bus method"

3425

for c in tcp_server.clients.values():

2941

for c in tcp_server.clients.itervalues():

3426

2942

if c.dbus_object_path == object_path:

3427

2943

del tcp_server.clients[c.name]

3428

2944

c.remove_from_connection()

3432

2948

self.client_removed_signal(c)

3433

2949

return

3434

2950

raise KeyError(object_path)

3435

2951

3436

2952

del _interface

3437

2953

3438

2954

@dbus.service.method(dbus.OBJECT_MANAGER_IFACE,

3439

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

2955

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

3440

2956

def GetManagedObjects(self):

3441

2957

"""D-Bus method"""

3442

2958

return dbus.Dictionary(

3443

{client.dbus_object_path:

3444

dbus.Dictionary(

3445

{interface: client.GetAll(interface)

3446

for interface in

3447

client._get_all_interface_names()})

3448

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

3449

2959

{ client.dbus_object_path:

2960

dbus.Dictionary(

2961

{ interface: client.GetAll(interface)

2962

for interface in

2963

client._get_all_interface_names()})

2964

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

2965

3450

2966

def client_added_signal(self, client):

3451

2967

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

3452

2968

if use_dbus:

3454

2970

self.InterfacesAdded(

3455

2971

client.dbus_object_path,

3456

2972

dbus.Dictionary(

3457

{interface: client.GetAll(interface)

3458

for interface in

3459

client._get_all_interface_names()}))

2973

{ interface: client.GetAll(interface)

2974

for interface in

2975

client._get_all_interface_names()}))

3460

2976

# Old signal

3461

2977

self.ClientAdded(client.dbus_object_path)

3462

2978

3463

2979

def client_removed_signal(self, client):

3464

2980

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

3465

2981

if use_dbus:

3470

2986

# Old signal

3471

2987

self.ClientRemoved(client.dbus_object_path,

3472

2988

client.name)

3473

2989

3474

2990

mandos_dbus_service = MandosDBusService()

3475

3476

# Save modules to variables to exempt the modules from being

3477

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

3478

mp = multiprocessing

3479

wn = wnull

3480

2991

3481

2992

def cleanup():

3482

2993

"Cleanup function; run on exit"

3483

2994

if zeroconf:

3484

2995

service.cleanup()

3485

3486

mp.active_children()

3487

wn.close()

2996

2997

multiprocessing.active_children()

2998

wnull.close()

3488

2999

if not (tcp_server.clients or client_settings):

3489

3000

return

3490

3001

3491

3002

# Store client before exiting. Secrets are encrypted with key

3492

3003

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

3493

3004

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

3494

3005

clients = {}

3495

3006

with PGPEngine() as pgp:

3496

for client in tcp_server.clients.values():

3007

for client in tcp_server.clients.itervalues():

3497

3008

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

3498

3009

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

3499

3010

key)

3500

3011

client_dict = {}

3501

3012

3502

3013

# A list of attributes that can not be pickled

3503

3014

# + secret.

3504

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

3505

"checker", "server_settings"}

3015

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

3016

"checker", "server_settings" }

3506

3017

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

3507

3018

.Object):

3508

3019

exclude.add(name)

3509

3020

3510

3021

client_dict["encrypted_secret"] = (client

3511

3022

.encrypted_secret)

3512

3023

for attr in client.client_structure:

3513

3024

if attr not in exclude:

3514

3025

client_dict[attr] = getattr(client, attr)

3515

3026

3516

3027

clients[client.name] = client_dict

3517

3028

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

3518

3029

3519

3030

try:

3520

3031

with tempfile.NamedTemporaryFile(

3521

3032

mode='wb',

3523

3034

prefix='clients-',

3524

3035

dir=os.path.dirname(stored_state_path),

3525

3036

delete=False) as stored_state:

3526

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

3527

protocol=2)

3037

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

3528

3038

tempname = stored_state.name

3529

3039

os.rename(tempname, stored_state_path)

3530

3040

except (IOError, OSError) as e:

3540

3050

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

3541

3051

exc_info=e)

3542

3052

raise

3543

3053

3544

3054

# Delete all clients, and settings from config

3545

3055

while tcp_server.clients:

3546

3056

name, client = tcp_server.clients.popitem()

3549

3059

# Don't signal the disabling

3550

3060

client.disable(quiet=True)

3551

3061

# Emit D-Bus signal for removal

3552

if use_dbus:

3553

mandos_dbus_service.client_removed_signal(client)

3062

mandos_dbus_service.client_removed_signal(client)

3554

3063

client_settings.clear()

3555

3064

3556

3065

atexit.register(cleanup)

3557

3558

for client in tcp_server.clients.values():

3066

3067

for client in tcp_server.clients.itervalues():

3559

3068

if use_dbus:

3560

3069

# Emit D-Bus signal for adding

3561

3070

mandos_dbus_service.client_added_signal(client)

3562

3071

# Need to initiate checking of clients

3563

3072

if client.enabled:

3564

3073

client.init_checker()

3565

3074

3566

3075

tcp_server.enable()

3567

3076

tcp_server.server_activate()

3568

3077

3569

3078

# Find out what port we got

3570

3079

if zeroconf:

3571

3080

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

3576

3085

else: # IPv4

3577

3086

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

3578

3087

*tcp_server.socket.getsockname())

3579

3580

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

3581

3088

3089

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

3090

3582

3091

try:

3583

3092

if zeroconf:

3584

3093

# From the Avahi example code

3589

3098

cleanup()

3590

3099

sys.exit(1)

3591

3100

# End of Avahi example code

3592

3593

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

3594

lambda *args, **kwargs:

3595

(tcp_server.handle_request

3596

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

3597

3101

3102

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

3103

lambda *args, **kwargs:

3104

(tcp_server.handle_request

3105

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

3106

3598

3107

logger.debug("Starting main loop")

3599

3108

main_loop.run()

3600

3109

except AvahiError as error: