/mandos/trunk : revision 518.1.2

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

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#

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# Everything else is

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#

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

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

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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import SocketServer as socketserver

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import socket

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import argparse

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import cPickle as pickle

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import multiprocessing

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import types

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import binascii

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import tempfile

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import itertools

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import collections

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import hashlib

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import dbus

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import dbus.service

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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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import Crypto.Cipher.AES

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try:

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SO_BINDTODEVICE = socket.SO_BINDTODEVICE

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.6.1"

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stored_state_file = "clients.pickle"

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version = "1.4.1"

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logger = logging.getLogger()

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stored_state_path = "/var/lib/mandos/clients.pickle"

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syslogger = (logging.handlers.SysLogHandler

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(facility = logging.handlers.SysLogHandler.LOG_DAEMON,

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

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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.if_nametoindex)

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except (OSError, AttributeError):

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def if_nametoindex(interface):

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

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

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

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ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

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

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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

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"""init logger and add loglevel"""

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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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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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logger.setLevel(level)

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class PGPError(Exception):

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"""Exception if encryption/decryption fails"""

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pass

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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.gnupgargs = ['--batch',

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'--home', self.tempdir,

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'--force-mdc',

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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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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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os.rmdir(os.path.join(root, dirname))

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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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encoded = b"mandos" + binascii.hexlify(password)

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if len(encoded) > 2048:

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# GnuPG can't handle long passwords, so encode differently

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encoded = (b"mandos" + password.replace(b"\\", b"\\\\")

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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(dir=self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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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

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def decrypt(self, data, password):

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passphrase = self.password_encode(password)

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with tempfile.NamedTemporaryFile(dir = self.tempdir

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) as passfile:

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passfile.write(passphrase)

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passfile.flush()

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

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'--passphrase-file',

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passfile.name]

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+ self.gnupgargs,

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stdin = subprocess.PIPE,

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stdout = subprocess.PIPE,

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stderr = subprocess.PIPE)

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decrypted_plaintext, err = proc.communicate(input

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= 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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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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console = logging.StreamHandler()

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

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' [%(process)d]:'

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' %(levelname)s:'

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' %(message)s'))

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logger.addHandler(console)

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class AvahiError(Exception):

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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

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

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See <http://www.dns-sd.org/ServiceTypes.html>

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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domain: string; Domain to publish on, default to .local if empty.

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

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

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

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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):

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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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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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

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logger.critical("DBusException: %s", error)

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self.cleanup()

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os._exit(1)

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self.rename_count += 1

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def remove(self):

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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()

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def add(self):

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

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self.remove()

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dbus.UInt16(self.port),

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avahi.string_array_to_txt_array(self.TXT))

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self.group.Commit()

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def entry_group_state_changed(self, state, error):

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

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

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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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unicode(error))

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

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.format(error))

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raise AvahiGroupError("State changed: %s"

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% unicode(error))

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def cleanup(self):

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

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if self.group is not None:

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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException):

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dbus.exceptions.DBusException) as e:

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pass

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self.group = None

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self.remove()

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

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

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

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

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else:

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

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def activate(self):

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

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if self.server is None:

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self.server_state_changed)

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

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class AvahiServiceToSyslog(AvahiService):

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def rename(self):

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

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ret = AvahiService.rename(self)

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syslogger.setFormatter(logging.Formatter

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

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

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.format(self.name)))

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

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

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% self.name))

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return ret

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def timedelta_to_milliseconds(td):

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def _timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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class Client(object):

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

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Attributes:

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

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

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

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

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

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

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

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

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last_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, -2 means no checker completed yet.

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

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last_checker_status: integer between 0 and 255 reflecting exit status

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of last checker. -1 reflect crashed checker,

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or None.

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last_enabled: datetime.datetime(); (UTC)

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name: string; from the config file, used in log messages and

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D-Bus identifiers

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secret: bytestring; sent verbatim (over TLS) to client

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timeout: datetime.timedelta(); How long from last_checked_ok

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until this client is disabled

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extended_timeout: extra long timeout when secret has been sent

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extended_timeout: extra long timeout when password has been sent

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runtime_expansions: Allowed attributes for runtime expansion.

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expires: datetime.datetime(); time (UTC) when a client will be

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disabled, or None

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server_settings: The server_settings dict from main()

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"""

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runtime_expansions = ("approval_delay", "approval_duration",

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

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

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"last_approval_request", "last_checked_ok",

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"created", "enabled", "fingerprint",

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"host", "interval", "last_checked_ok",

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

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client_defaults = { "timeout": "PT5M",

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"extended_timeout": "PT15M",

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"interval": "PT2M",

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

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"host": "",

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"approval_delay": "PT0S",

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"approval_duration": "PT1S",

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"approved_by_default": "True",

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"enabled": "True",

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}

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def timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.timeout)

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return _timedelta_to_milliseconds(self.timeout)

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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.extended_timeout)

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return _timedelta_to_milliseconds(self.extended_timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return timedelta_to_milliseconds(self.interval)

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return _timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

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return timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

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def config_parser(config):

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

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{ client_name: {setting_name: value, ...}, ...}

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with exceptions for any special settings as defined above.

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NOTE: Must be a pure function. Must return the same result

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value given the same arguments.

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"""

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settings = {}

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for client_name in config.sections():

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section = dict(config.items(client_name))

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client = settings[client_name] = {}

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

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# Reformat values from string types to Python types

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client["approved_by_default"] = config.getboolean(

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client_name, "approved_by_default")

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

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"enabled")

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

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.replace(" ", ""))

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if "secret" in section:

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

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elif "secfile" in section:

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

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(section["secfile"])),

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"rb") as secfile:

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

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else:

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

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.format(section))

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

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client["extended_timeout"] = string_to_delta(

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section["extended_timeout"])

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

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client["approval_delay"] = string_to_delta(

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section["approval_delay"])

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client["approval_duration"] = string_to_delta(

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section["approval_duration"])

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client["checker_command"] = section["checker"]

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client["last_approval_request"] = None

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client["last_checked_ok"] = None

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client["last_checker_status"] = -2

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return settings

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

346

return _timedelta_to_milliseconds(self.approval_delay)

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def __init__(self, name = None, config=None):

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"""Note: the 'checker' key in 'config' sets the

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'checker_command' attribute and *not* the 'checker'

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attribute."""

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self.name = name

532

if server_settings is None:

533

server_settings = {}

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self.server_settings = server_settings

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# adding all client settings

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for setting, value in settings.iteritems():

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setattr(self, setting, value)

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if self.enabled:

540

if not hasattr(self, "last_enabled"):

541

self.last_enabled = datetime.datetime.utcnow()

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if not hasattr(self, "expires"):

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

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+ self.timeout)

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else:

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self.last_enabled = None

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self.expires = None

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if config is None:

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config = {}

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

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# Uppercase and remove spaces from fingerprint for later

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# comparison purposes with return value from the fingerprint()

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# function

359

self.fingerprint = (config["fingerprint"].upper()

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.replace(" ", ""))

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

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

555

datetime.datetime.utcnow())

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# attributes specific for this server instance

362

if "secret" in config:

363

self.secret = config["secret"].decode("base64")

364

elif "secfile" in config:

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

366

(config["secfile"])),

367

"rb") as secfile:

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self.secret = secfile.read()

369

else:

370

raise TypeError("No secret or secfile for client %s"

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% self.name)

372

self.host = config.get("host", "")

373

self.created = datetime.datetime.utcnow()

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self.enabled = True

375

self.last_approval_request = None

376

self.last_enabled = datetime.datetime.utcnow()

377

self.last_checked_ok = None

378

self.last_checker_status = None

379

self.timeout = string_to_delta(config["timeout"])

380

self.extended_timeout = string_to_delta(config

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["extended_timeout"])

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self.interval = string_to_delta(config["interval"])

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self.checker = None

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self.checker_initiator_tag = None

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self.disable_initiator_tag = None

386

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

561

387

self.checker_callback_tag = None

388

self.checker_command = config["checker"]

562

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self.current_checker_command = None

563

self.approved = None

390

self._approved = None

391

self.approved_by_default = config.get("approved_by_default",

392

True)

564

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self.approvals_pending = 0

394

self.approval_delay = string_to_delta(

395

config["approval_delay"])

396

self.approval_duration = string_to_delta(

397

config["approval_duration"])

565

398

self.changedstate = (multiprocessing_manager

566

399

.Condition(multiprocessing_manager

567

400

.Lock()))

568

self.client_structure = [attr for attr in

569

self.__dict__.iterkeys()

570

if not attr.startswith("_")]

401

self.client_structure = [attr for attr in self.__dict__.iterkeys() if not attr.startswith("_")]

571

402

self.client_structure.append("client_structure")

572

403

404

573

405

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

574

lambda obj:

575

isinstance(obj,

576

property)):

406

lambda obj: isinstance(obj, property)):

577

407

if not name.startswith("_"):

578

408

self.client_structure.append(name)

579

409

587

417

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

588

418

# Already enabled

589

419

return

420

self.send_changedstate()

590

421

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

591

422

self.enabled = True

592

423

self.last_enabled = datetime.datetime.utcnow()

593

424

self.init_checker()

594

self.send_changedstate()

595

425

596

426

def disable(self, quiet=True):

597

427

"""Disable this client."""

598

428

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

599

429

return False

600

430

if not quiet:

431

self.send_changedstate()

432

if not quiet:

601

433

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

602

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

434

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

603

435

gobject.source_remove(self.disable_initiator_tag)

604

436

self.disable_initiator_tag = None

605

437

self.expires = None

606

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

438

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

607

439

gobject.source_remove(self.checker_initiator_tag)

608

440

self.checker_initiator_tag = None

609

441

self.stop_checker()

610

442

self.enabled = False

611

if not quiet:

612

self.send_changedstate()

613

443

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

614

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return False

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445

616

446

def __del__(self):

617

447

self.disable()

618

448

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449

def init_checker(self):

620

450

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

621

451

# and every interval from then on.

622

if self.checker_initiator_tag is not None:

623

gobject.source_remove(self.checker_initiator_tag)

624

452

self.checker_initiator_tag = (gobject.timeout_add

625

453

(self.interval_milliseconds(),

626

454

self.start_checker))

627

455

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

628

if self.disable_initiator_tag is not None:

629

gobject.source_remove(self.disable_initiator_tag)

630

456

self.disable_initiator_tag = (gobject.timeout_add

631

457

(self.timeout_milliseconds(),

632

458

self.disable))

633

459

# Also start a new checker *right now*.

634

460

self.start_checker()

635

461

462

636

463

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

637

464

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

638

465

self.checker_callback_tag = None

639

466

self.checker = None

640

467

if os.WIFEXITED(condition):

641

self.last_checker_status = os.WEXITSTATUS(condition)

468

self.last_checker_status = os.WEXITSTATUS(condition)

642

469

if self.last_checker_status == 0:

643

470

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

644

471

vars(self))

651

478

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

652

479

vars(self))

653

480

654

def checked_ok(self):

655

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

656

self.last_checked_ok = datetime.datetime.utcnow()

657

self.last_checker_status = 0

658

self.bump_timeout()

659

660

def bump_timeout(self, timeout=None):

661

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

481

def checked_ok(self, timeout=None):

482

"""Bump up the timeout for this client.

483

484

This should only be called when the client has been seen,

485

alive and well.

486

"""

662

487

if timeout is None:

663

488

timeout = self.timeout

489

self.last_checked_ok = datetime.datetime.utcnow()

664

490

if self.disable_initiator_tag is not None:

665

491

gobject.source_remove(self.disable_initiator_tag)

666

self.disable_initiator_tag = None

667

492

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

668

493

self.disable_initiator_tag = (gobject.timeout_add

669

(timedelta_to_milliseconds

494

(_timedelta_to_milliseconds

670

495

(timeout), self.disable))

671

496

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

672

497

679

504

If a checker already exists, leave it running and do

680

505

nothing."""

681

506

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

682

# did that, and if a checker (for some reason) started running

683

# slowly and taking more than 'interval' time, then the client

684

# would inevitably timeout, since no checker would get a

685

# chance to run to completion. If we instead leave running

507

# did that, then if a checker (for some reason) started

508

# running slowly and taking more than 'interval' time, the

509

# client would inevitably timeout, since no checker would get

510

# a chance to run to completion. If we instead leave running

686

511

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

687

512

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

688

513

# should be.

702

527

self.current_checker_command)

703

528

# Start a new checker if needed

704

529

if self.checker is None:

705

# Escape attributes for the shell

706

escaped_attrs = dict(

707

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

708

for attr in

709

self.runtime_expansions)

710

530

try:

711

command = self.checker_command % escaped_attrs

712

except TypeError as error:

713

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

714

self.checker_command, exc_info=error)

715

return True # Try again later

531

# In case checker_command has exactly one % operator

532

command = self.checker_command % self.host

533

except TypeError:

534

# Escape attributes for the shell

535

escaped_attrs = dict(

536

(attr,

537

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

538

errors=

539

'replace')))

540

for attr in

541

self.runtime_expansions)

542

543

try:

544

command = self.checker_command % escaped_attrs

545

except TypeError as error:

546

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

547

' %s', self.checker_command, error)

548

return True # Try again later

716

549

self.current_checker_command = command

717

550

try:

718

551

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

721

554

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

722

555

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

723

556

# always replaced by /dev/null.)

724

# The exception is when not debugging but nevertheless

725

# running in the foreground; use the previously

726

# created wnull.

727

popen_args = {}

728

if (not self.server_settings["debug"]

729

and self.server_settings["foreground"]):

730

popen_args.update({"stdout": wnull,

731

"stderr": wnull })

732

557

self.checker = subprocess.Popen(command,

733

558

close_fds=True,

734

shell=True, cwd="/",

735

**popen_args)

736

except OSError as error:

737

logger.error("Failed to start subprocess",

738

exc_info=error)

739

return True

740

self.checker_callback_tag = (gobject.child_watch_add

741

(self.checker.pid,

742

self.checker_callback,

743

data=command))

744

# The checker may have completed before the gobject

745

# watch was added. Check for this.

746

try:

559

shell=True, cwd="/")

560

self.checker_callback_tag = (gobject.child_watch_add

561

(self.checker.pid,

562

self.checker_callback,

563

data=command))

564

# The checker may have completed before the gobject

565

# watch was added. Check for this.

747

566

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

567

if pid:

568

gobject.source_remove(self.checker_callback_tag)

569

self.checker_callback(pid, status, command)

748

570

except OSError as error:

749

if error.errno == errno.ECHILD:

750

# This should never happen

751

logger.error("Child process vanished",

752

exc_info=error)

753

return True

754

raise

755

if pid:

756

gobject.source_remove(self.checker_callback_tag)

757

self.checker_callback(pid, status, command)

571

logger.error("Failed to start subprocess: %s",

572

error)

758

573

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

759

574

return True

760

575

767

582

return

768

583

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

769

584

try:

770

self.checker.terminate()

585

os.kill(self.checker.pid, signal.SIGTERM)

771

586

#time.sleep(0.5)

772

587

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

773

# self.checker.kill()

588

# os.kill(self.checker.pid, signal.SIGKILL)

774

589

except OSError as error:

775

590

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

776

591

raise

777

592

self.checker = None

778

593

594

# Encrypts a client secret and stores it in a varible encrypted_secret

595

def encrypt_secret(self, key):

596

# Encryption-key need to be of a specific size, so we hash inputed key

597

hasheng = hashlib.sha256()

598

hasheng.update(key)

599

encryptionkey = hasheng.digest()

600

601

# Create validation hash so we know at decryption if it was sucessful

602

hasheng = hashlib.sha256()

603

hasheng.update(self.secret)

604

validationhash = hasheng.digest()

605

606

# Encrypt secret

607

iv = os.urandom(Crypto.Cipher.AES.block_size)

608

ciphereng = Crypto.Cipher.AES.new(encryptionkey,

609

Crypto.Cipher.AES.MODE_CFB, iv)

610

ciphertext = ciphereng.encrypt(validationhash+self.secret)

611

self.encrypted_secret = (ciphertext, iv)

612

613

# Decrypt a encrypted client secret

614

def decrypt_secret(self, key):

615

# Decryption-key need to be of a specific size, so we hash inputed key

616

hasheng = hashlib.sha256()

617

hasheng.update(key)

618

encryptionkey = hasheng.digest()

619

620

# Decrypt encrypted secret

621

ciphertext, iv = self.encrypted_secret

622

ciphereng = Crypto.Cipher.AES.new(encryptionkey,

623

Crypto.Cipher.AES.MODE_CFB, iv)

624

plain = ciphereng.decrypt(ciphertext)

625

626

# Validate decrypted secret to know if it was succesful

627

hasheng = hashlib.sha256()

628

validationhash = plain[:hasheng.digest_size]

629

secret = plain[hasheng.digest_size:]

630

hasheng.update(secret)

631

632

# if validation fails, we use key as new secret. Otherwhise, we use

633

# the decrypted secret

634

if hasheng.digest() == validationhash:

635

self.secret = secret

636

else:

637

self.secret = key

638

del self.encrypted_secret

639

779

640

780

641

def dbus_service_property(dbus_interface, signature="v",

781

642

access="readwrite", byte_arrays=False):

793

654

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

794

655

if byte_arrays and signature != "ay":

795

656

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

796

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

657

" signature %r" % signature)

797

658

def decorator(func):

798

659

func._dbus_is_property = True

799

660

func._dbus_interface = dbus_interface

807

668

return decorator

808

669

809

670

810

def dbus_interface_annotations(dbus_interface):

811

"""Decorator for marking functions returning interface annotations

812

813

Usage:

814

815

@dbus_interface_annotations("org.example.Interface")

816

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

817

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

818

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

819

"false"}

820

"""

821

def decorator(func):

822

func._dbus_is_interface = True

823

func._dbus_interface = dbus_interface

824

func._dbus_name = dbus_interface

825

return func

826

return decorator

827

828

829

def dbus_annotations(annotations):

830

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

831

Usage:

832

833

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

834

access="r")

835

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

836

"org.freedesktop.DBus.Property."

837

"EmitsChangedSignal": "false"})

838

def Property_dbus_property(self):

839

return dbus.Boolean(False)

840

"""

841

def decorator(func):

842

func._dbus_annotations = annotations

843

return func

844

return decorator

845

846

847

671

class DBusPropertyException(dbus.exceptions.DBusException):

848

672

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

849

673

"""

872

696

"""

873

697

874

698

@staticmethod

875

def _is_dbus_thing(thing):

876

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

877

878

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

879

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

880

"""

881

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

882

False)

699

def _is_dbus_property(obj):

700

return getattr(obj, "_dbus_is_property", False)

883

701

884

def _get_all_dbus_things(self, thing):

702

def _get_all_dbus_properties(self):

885

703

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

886

704

"""

887

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

888

name),

889

athing.__get__(self))

705

return ((prop.__get__(self)._dbus_name, prop.__get__(self))

890

706

for cls in self.__class__.__mro__

891

for name, athing in

892

inspect.getmembers(cls,

893

self._is_dbus_thing(thing)))

707

for name, prop in

708

inspect.getmembers(cls, self._is_dbus_property))

894

709

895

710

def _get_dbus_property(self, interface_name, property_name):

896

711

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

898

713

"""

899

714

for cls in self.__class__.__mro__:

900

715

for name, value in (inspect.getmembers

901

(cls,

902

self._is_dbus_thing("property"))):

716

(cls, self._is_dbus_property)):

903

717

if (value._dbus_name == property_name

904

718

and value._dbus_interface == interface_name):

905

719

return value.__get__(self)

934

748

# signatures other than "ay".

935

749

if prop._dbus_signature != "ay":

936

750

raise ValueError

937

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

938

for byte in value))

751

value = dbus.ByteArray(''.join(unichr(byte)

752

for byte in value))

939

753

prop(value)

940

754

941

755

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

946

760

947

761

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

948

762

"""

949

properties = {}

950

for name, prop in self._get_all_dbus_things("property"):

763

all = {}

764

for name, prop in self._get_all_dbus_properties():

951

765

if (interface_name

952

766

and interface_name != prop._dbus_interface):

953

767

# Interface non-empty but did not match

957

771

continue

958

772

value = prop()

959

773

if not hasattr(value, "variant_level"):

960

properties[name] = value

774

all[name] = value

961

775

continue

962

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

963

value.variant_level+1)

964

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

776

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

777

value.variant_level+1)

778

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

965

779

966

780

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

967

781

out_signature="s",

968

782

path_keyword='object_path',

969

783

connection_keyword='connection')

970

784

def Introspect(self, object_path, connection):

971

"""Overloading of standard D-Bus method.

972

973

Inserts property tags and interface annotation tags.

785

"""Standard D-Bus method, overloaded to insert property tags.

974

786

"""

975

787

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

976

788

connection)

983

795

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

984

796

return e

985

797

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

986

# Add property tags

987

798

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

988

799

for name, prop

989

in self._get_all_dbus_things("property")

800

in self._get_all_dbus_properties()

990

801

if prop._dbus_interface

991

802

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

992

803

if_tag.appendChild(tag)

993

# Add annotation tags

994

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

995

for tag in if_tag.getElementsByTagName(typ):

996

annots = dict()

997

for name, prop in (self.

998

_get_all_dbus_things(typ)):

999

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

1000

and prop._dbus_interface

1001

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

1002

annots.update(getattr

1003

(prop,

1004

"_dbus_annotations",

1005

{}))

1006

for name, value in annots.iteritems():

1007

ann_tag = document.createElement(

1008

"annotation")

1009

ann_tag.setAttribute("name", name)

1010

ann_tag.setAttribute("value", value)

1011

tag.appendChild(ann_tag)

1012

# Add interface annotation tags

1013

for annotation, value in dict(

1014

itertools.chain.from_iterable(

1015

annotations().iteritems()

1016

for name, annotations in

1017

self._get_all_dbus_things("interface")

1018

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

1019

)).iteritems():

1020

ann_tag = document.createElement("annotation")

1021

ann_tag.setAttribute("name", annotation)

1022

ann_tag.setAttribute("value", value)

1023

if_tag.appendChild(ann_tag)

1024

804

# Add the names to the return values for the

1025

805

# "org.freedesktop.DBus.Properties" methods

1026

806

if (if_tag.getAttribute("name")

1041

821

except (AttributeError, xml.dom.DOMException,

1042

822

xml.parsers.expat.ExpatError) as error:

1043

823

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

1044

exc_info=error)

824

error)

1045

825

return xmlstring

1046

826

1047

827

1048

def datetime_to_dbus(dt, variant_level=0):

828

def datetime_to_dbus (dt, variant_level=0):

1049

829

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

1050

830

if dt is None:

1051

831

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

1052

832

return dbus.String(dt.isoformat(),

1053

833

variant_level=variant_level)

1054

834

1055

1056

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1057

"""A class decorator; applied to a subclass of

1058

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

1059

interface names according to the "alt_interface_names" mapping.

1060

Usage:

1061

1062

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

1063

"net.example.AlternateInterface"})

1064

class SampleDBusObject(dbus.service.Object):

1065

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

1066

def SampleDBusMethod():

1067

pass

1068

1069

The above "SampleDBusMethod" on "SampleDBusObject" will be

1070

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

1071

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

1072

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

1073

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

1074

1075

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

1076

(from DBusObjectWithProperties) and interfaces (from the

1077

dbus_interface_annotations decorator).

835

class AlternateDBusNamesMetaclass(DBusObjectWithProperties

836

.__metaclass__):

837

"""Applied to an empty subclass of a D-Bus object, this metaclass

838

will add additional D-Bus attributes matching a certain pattern.

1078

839

"""

1079

def wrapper(cls):

1080

for orig_interface_name, alt_interface_name in (

1081

alt_interface_names.iteritems()):

1082

attr = {}

1083

interface_names = set()

1084

# Go though all attributes of the class

1085

for attrname, attribute in inspect.getmembers(cls):

840

def __new__(mcs, name, bases, attr):

841

# Go through all the base classes which could have D-Bus

842

# methods, signals, or properties in them

843

for base in (b for b in bases

844

if issubclass(b, dbus.service.Object)):

845

# Go though all attributes of the base class

846

for attrname, attribute in inspect.getmembers(base):

1086

847

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

1087

848

# with the wrong interface name

1088

849

if (not hasattr(attribute, "_dbus_interface")

1089

850

or not attribute._dbus_interface

1090

.startswith(orig_interface_name)):

851

.startswith("se.recompile.Mandos")):

1091

852

continue

1092

853

# Create an alternate D-Bus interface name based on

1093

854

# the current name

1094

855

alt_interface = (attribute._dbus_interface

1095

.replace(orig_interface_name,

1096

alt_interface_name))

1097

interface_names.add(alt_interface)

856

.replace("se.recompile.Mandos",

857

"se.bsnet.fukt.Mandos"))

1098

858

# Is this a D-Bus signal?

1099

859

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

1100

# Extract the original non-method undecorated

1101

# function by black magic

860

# Extract the original non-method function by

861

# black magic

1102

862

nonmethod_func = (dict(

1103

863

zip(attribute.func_code.co_freevars,

1104

864

attribute.__closure__))["func"]

1115

875

nonmethod_func.func_name,

1116

876

nonmethod_func.func_defaults,

1117

877

nonmethod_func.func_closure)))

1118

# Copy annotations, if any

1119

try:

1120

new_function._dbus_annotations = (

1121

dict(attribute._dbus_annotations))

1122

except AttributeError:

1123

pass

1124

878

# Define a creator of a function to call both the

1125

# original and alternate functions, so both the

1126

# original and alternate signals gets sent when

1127

# the function is called

879

# old and new functions, so both the old and new

880

# signals gets sent when the function is called

1128

881

def fixscope(func1, func2):

1129

882

"""This function is a scope container to pass

1130

883

func1 and func2 to the "call_both" function

1137

890

return call_both

1138

891

# Create the "call_both" function and add it to

1139

892

# the class

1140

attr[attrname] = fixscope(attribute, new_function)

893

attr[attrname] = fixscope(attribute,

894

new_function)

1141

895

# Is this a D-Bus method?

1142

896

elif getattr(attribute, "_dbus_is_method", False):

1143

897

# Create a new, but exactly alike, function

1154

908

attribute.func_name,

1155

909

attribute.func_defaults,

1156

910

attribute.func_closure)))

1157

# Copy annotations, if any

1158

try:

1159

attr[attrname]._dbus_annotations = (

1160

dict(attribute._dbus_annotations))

1161

except AttributeError:

1162

pass

1163

911

# Is this a D-Bus property?

1164

912

elif getattr(attribute, "_dbus_is_property", False):

1165

913

# Create a new, but exactly alike, function

1179

927

attribute.func_name,

1180

928

attribute.func_defaults,

1181

929

attribute.func_closure)))

1182

# Copy annotations, if any

1183

try:

1184

attr[attrname]._dbus_annotations = (

1185

dict(attribute._dbus_annotations))

1186

except AttributeError:

1187

pass

1188

# Is this a D-Bus interface?

1189

elif getattr(attribute, "_dbus_is_interface", False):

1190

# Create a new, but exactly alike, function

1191

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

1192

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

1193

# to the class.

1194

attr[attrname] = (dbus_interface_annotations

1195

(alt_interface)

1196

(types.FunctionType

1197

(attribute.func_code,

1198

attribute.func_globals,

1199

attribute.func_name,

1200

attribute.func_defaults,

1201

attribute.func_closure)))

1202

if deprecate:

1203

# Deprecate all alternate interfaces

1204

iname="_AlternateDBusNames_interface_annotation{0}"

1205

for interface_name in interface_names:

1206

@dbus_interface_annotations(interface_name)

1207

def func(self):

1208

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

1209

"true" }

1210

# Find an unused name

1211

for aname in (iname.format(i)

1212

for i in itertools.count()):

1213

if aname not in attr:

1214

attr[aname] = func

1215

break

1216

if interface_names:

1217

# Replace the class with a new subclass of it with

1218

# methods, signals, etc. as created above.

1219

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

1220

(cls,), attr)

1221

return cls

1222

return wrapper

1223

1224

1225

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

1226

"se.bsnet.fukt.Mandos"})

930

return type.__new__(mcs, name, bases, attr)

931

1227

932

class ClientDBus(Client, DBusObjectWithProperties):

1228

933

"""A Client class using D-Bus

1229

934

1240

945

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

1241

946

self.bus = bus

1242

947

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

948

949

self._approvals_pending = 0

1243

950

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

1244

951

# the D-Bus

1245

952

client_object_name = unicode(self.name).translate(

1249

956

("/clients/" + client_object_name))

1250

957

DBusObjectWithProperties.__init__(self, self.bus,

1251

958

self.dbus_object_path)

1252

959

1253

960

def notifychangeproperty(transform_func,

1254

961

dbus_name, type_func=lambda x: x,

1255

962

variant_level=1):

1256

963

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

1257

964

its changes to DBus.

1258

965

1259

966

transform_fun: Function that takes a value and a variant_level

1260

967

and transforms it to a D-Bus type.

1261

968

dbus_name: D-Bus name of the variable

1278

985

1279

986

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

1280

987

988

1281

989

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1282

990

approvals_pending = notifychangeproperty(dbus.Boolean,

1283

991

"ApprovalPending",

1290

998

checker is not None)

1291

999

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1292

1000

"LastCheckedOK")

1293

last_checker_status = notifychangeproperty(dbus.Int16,

1294

"LastCheckerStatus")

1295

1001

last_approval_request = notifychangeproperty(

1296

1002

datetime_to_dbus, "LastApprovalRequest")

1297

1003

approved_by_default = notifychangeproperty(dbus.Boolean,

1298

1004

"ApprovedByDefault")

1299

approval_delay = notifychangeproperty(dbus.UInt64,

1005

approval_delay = notifychangeproperty(dbus.UInt16,

1300

1006

"ApprovalDelay",

1301

1007

type_func =

1302

timedelta_to_milliseconds)

1008

_timedelta_to_milliseconds)

1303

1009

approval_duration = notifychangeproperty(

1304

dbus.UInt64, "ApprovalDuration",

1305

type_func = timedelta_to_milliseconds)

1010

dbus.UInt16, "ApprovalDuration",

1011

type_func = _timedelta_to_milliseconds)

1306

1012

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

1307

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

1013

timeout = notifychangeproperty(dbus.UInt16, "Timeout",

1308

1014

type_func =

1309

timedelta_to_milliseconds)

1015

_timedelta_to_milliseconds)

1310

1016

extended_timeout = notifychangeproperty(

1311

dbus.UInt64, "ExtendedTimeout",

1312

type_func = timedelta_to_milliseconds)

1313

interval = notifychangeproperty(dbus.UInt64,

1017

dbus.UInt16, "ExtendedTimeout",

1018

type_func = _timedelta_to_milliseconds)

1019

interval = notifychangeproperty(dbus.UInt16,

1314

1020

"Interval",

1315

1021

type_func =

1316

timedelta_to_milliseconds)

1022

_timedelta_to_milliseconds)

1317

1023

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

1318

1024

1319

1025

del notifychangeproperty

1361

1067

return r

1362

1068

1363

1069

def _reset_approved(self):

1364

self.approved = None

1070

self._approved = None

1365

1071

return False

1366

1072

1367

1073

def approve(self, value=True):

1368

self.approved = value

1369

gobject.timeout_add(timedelta_to_milliseconds

1074

self.send_changedstate()

1075

self._approved = value

1076

gobject.timeout_add(_timedelta_to_milliseconds

1370

1077

(self.approval_duration),

1371

1078

self._reset_approved)

1372

self.send_changedstate()

1079

1373

1080

1374

1081

## D-Bus methods, signals & properties

1375

1082

_interface = "se.recompile.Mandos.Client"

1376

1083

1377

## Interfaces

1378

1379

@dbus_interface_annotations(_interface)

1380

def _foo(self):

1381

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

1382

"false"}

1383

1384

1084

## Signals

1385

1085

1386

1086

# CheckerCompleted - signal

1485

1185

access="readwrite")

1486

1186

def ApprovalDuration_dbus_property(self, value=None):

1487

1187

if value is None: # get

1488

return dbus.UInt64(timedelta_to_milliseconds(

1188

return dbus.UInt64(_timedelta_to_milliseconds(

1489

1189

self.approval_duration))

1490

1190

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

1491

1191

1505

1205

def Host_dbus_property(self, value=None):

1506

1206

if value is None: # get

1507

1207

return dbus.String(self.host)

1508

self.host = unicode(value)

1208

self.host = value

1509

1209

1510

1210

# Created - property

1511

1211

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

1512

1212

def Created_dbus_property(self):

1513

return datetime_to_dbus(self.created)

1213

return dbus.String(datetime_to_dbus(self.created))

1514

1214

1515

1215

# LastEnabled - property

1516

1216

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

1537

1237

return

1538

1238

return datetime_to_dbus(self.last_checked_ok)

1539

1239

1540

# LastCheckerStatus - property

1541

@dbus_service_property(_interface, signature="n",

1542

access="read")

1543

def LastCheckerStatus_dbus_property(self):

1544

return dbus.Int16(self.last_checker_status)

1545

1546

1240

# Expires - property

1547

1241

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

1548

1242

def Expires_dbus_property(self):

1559

1253

def Timeout_dbus_property(self, value=None):

1560

1254

if value is None: # get

1561

1255

return dbus.UInt64(self.timeout_milliseconds())

1562

old_timeout = self.timeout

1563

1256

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

1564

# Reschedule disabling

1565

if self.enabled:

1566

now = datetime.datetime.utcnow()

1567

self.expires += self.timeout - old_timeout

1568

if self.expires <= now:

1569

# The timeout has passed

1570

self.disable()

1571

else:

1572

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

1573

is None):

1574

return

1575

gobject.source_remove(self.disable_initiator_tag)

1576

self.disable_initiator_tag = (

1577

gobject.timeout_add(

1578

timedelta_to_milliseconds(self.expires - now),

1579

self.disable))

1257

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

1258

return

1259

# Reschedule timeout

1260

gobject.source_remove(self.disable_initiator_tag)

1261

self.disable_initiator_tag = None

1262

self.expires = None

1263

time_to_die = _timedelta_to_milliseconds((self

1264

.last_checked_ok

1265

+ self.timeout)

1266

- datetime.datetime

1267

.utcnow())

1268

if time_to_die <= 0:

1269

# The timeout has passed

1270

self.disable()

1271

else:

1272

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

1273

+ datetime.timedelta(milliseconds =

1274

time_to_die))

1275

self.disable_initiator_tag = (gobject.timeout_add

1276

(time_to_die, self.disable))

1580

1277

1581

1278

# ExtendedTimeout - property

1582

1279

@dbus_service_property(_interface, signature="t",

1595

1292

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

1596

1293

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

1597

1294

return

1598

if self.enabled:

1599

# Reschedule checker run

1600

gobject.source_remove(self.checker_initiator_tag)

1601

self.checker_initiator_tag = (gobject.timeout_add

1602

(value, self.start_checker))

1603

self.start_checker() # Start one now, too

1295

# Reschedule checker run

1296

gobject.source_remove(self.checker_initiator_tag)

1297

self.checker_initiator_tag = (gobject.timeout_add

1298

(value, self.start_checker))

1299

self.start_checker() # Start one now, too

1604

1300

1605

1301

# Checker - property

1606

1302

@dbus_service_property(_interface, signature="s",

1608

1304

def Checker_dbus_property(self, value=None):

1609

1305

if value is None: # get

1610

1306

return dbus.String(self.checker_command)

1611

self.checker_command = unicode(value)

1307

self.checker_command = value

1612

1308

1613

1309

# CheckerRunning - property

1614

1310

@dbus_service_property(_interface, signature="b",

1643

1339

raise KeyError()

1644

1340

1645

1341

def __getattribute__(self, name):

1646

if name == '_pipe':

1342

if(name == '_pipe'):

1647

1343

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

1648

1344

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

1649

1345

data = self._pipe.recv()

1656

1352

return func

1657

1353

1658

1354

def __setattr__(self, name, value):

1659

if name == '_pipe':

1355

if(name == '_pipe'):

1660

1356

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

1661

1357

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

1662

1358

1359

class ClientDBusTransitional(ClientDBus):

1360

__metaclass__ = AlternateDBusNamesMetaclass

1663

1361

1664

1362

class ClientHandler(socketserver.BaseRequestHandler, object):

1665

1363

"""A class to handle client connections.

1748

1446

client.Rejected("Disabled")

1749

1447

return

1750

1448

1751

if client.approved or not client.approval_delay:

1449

if client._approved or not client.approval_delay:

1752

1450

#We are approved or approval is disabled

1753

1451

break

1754

elif client.approved is None:

1452

elif client._approved is None:

1755

1453

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

1756

1454

client.name)

1757

1455

if self.server.use_dbus:

1770

1468

#wait until timeout or approved

1771

1469

time = datetime.datetime.now()

1772

1470

client.changedstate.acquire()

1773

client.changedstate.wait(

1774

float(timedelta_to_milliseconds(delay)

1775

/ 1000))

1471

(client.changedstate.wait

1472

(float(client._timedelta_to_milliseconds(delay)

1473

/ 1000)))

1776

1474

client.changedstate.release()

1777

1475

time2 = datetime.datetime.now()

1778

1476

if (time2 - time) >= delay:

1794

1492

try:

1795

1493

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

1796

1494

except gnutls.errors.GNUTLSError as error:

1797

logger.warning("gnutls send failed",

1798

exc_info=error)

1495

logger.warning("gnutls send failed")

1799

1496

return

1800

1497

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

1801

1498

sent, len(client.secret)

1804

1501

1805

1502

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

1806

1503

# bump the timeout using extended_timeout

1807

client.bump_timeout(client.extended_timeout)

1504

client.checked_ok(client.extended_timeout)

1808

1505

if self.server.use_dbus:

1809

1506

# Emit D-Bus signal

1810

1507

client.GotSecret()

1815

1512

try:

1816

1513

session.bye()

1817

1514

except gnutls.errors.GNUTLSError as error:

1818

logger.warning("GnuTLS bye failed",

1819

exc_info=error)

1515

logger.warning("GnuTLS bye failed")

1820

1516

1821

1517

@staticmethod

1822

1518

def peer_certificate(session):

1878

1574

# Convert the buffer to a Python bytestring

1879

1575

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

1880

1576

# Convert the bytestring to hexadecimal notation

1881

hex_fpr = binascii.hexlify(fpr).upper()

1577

hex_fpr = ''.join("%02X" % ord(char) for char in fpr)

1882

1578

return hex_fpr

1883

1579

1884

1580

1887

1583

def sub_process_main(self, request, address):

1888

1584

try:

1889

1585

self.finish_request(request, address)

1890

except Exception:

1586

except:

1891

1587

self.handle_error(request, address)

1892

1588

self.close_request(request)

1893

1589

1894

1590

def process_request(self, request, address):

1895

1591

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

1896

1592

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

1897

args = (request, address))

1593

args = (request,

1594

address))

1898

1595

proc.start()

1899

1596

return proc

1900

1597

1928

1625

use_ipv6: Boolean; to use IPv6 or not

1929

1626

"""

1930

1627

def __init__(self, server_address, RequestHandlerClass,

1931

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

1932

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

1933

creating a new one with socket.socket().

1934

"""

1628

interface=None, use_ipv6=True):

1935

1629

self.interface = interface

1936

1630

if use_ipv6:

1937

1631

self.address_family = socket.AF_INET6

1938

if socketfd is not None:

1939

# Save the file descriptor

1940

self.socketfd = socketfd

1941

# Save the original socket.socket() function

1942

self.socket_socket = socket.socket

1943

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

1944

#

1945

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

1946

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

1947

# patching socket.socket.)

1948

#

1949

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

1950

@functools.wraps(socket.socket)

1951

def socket_wrapper(*args, **kwargs):

1952

# Restore original function so subsequent calls are

1953

# not affected.

1954

socket.socket = self.socket_socket

1955

del self.socket_socket

1956

# This time only, return a new socket object from the

1957

# saved file descriptor.

1958

return socket.fromfd(self.socketfd, *args, **kwargs)

1959

# Replace socket.socket() function with wrapper

1960

socket.socket = socket_wrapper

1961

# The socketserver.TCPServer.__init__ will call

1962

# socket.socket(), which might be our replacement,

1963

# socket_wrapper(), if socketfd was set.

1964

1632

socketserver.TCPServer.__init__(self, server_address,

1965

1633

RequestHandlerClass)

1966

1967

1634

def server_bind(self):

1968

1635

"""This overrides the normal server_bind() function

1969

1636

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

1977

1644

try:

1978

1645

self.socket.setsockopt(socket.SOL_SOCKET,

1979

1646

SO_BINDTODEVICE,

1980

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

1647

str(self.interface

1648

+ '\0'))

1981

1649

except socket.error as error:

1982

if error.errno == errno.EPERM:

1983

logger.error("No permission to bind to"

1984

" interface %s", self.interface)

1985

elif error.errno == errno.ENOPROTOOPT:

1650

if error[0] == errno.EPERM:

1651

logger.error("No permission to"

1652

" bind to interface %s",

1653

self.interface)

1654

elif error[0] == errno.ENOPROTOOPT:

1986

1655

logger.error("SO_BINDTODEVICE not available;"

1987

1656

" cannot bind to interface %s",

1988

1657

self.interface)

1989

elif error.errno == errno.ENODEV:

1990

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

1991

" cannot bind", self.interface)

1992

1658

else:

1993

1659

raise

1994

1660

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

1997

1663

if self.address_family == socket.AF_INET6:

1998

1664

any_address = "::" # in6addr_any

1999

1665

else:

2000

any_address = "0.0.0.0" # INADDR_ANY

1666

any_address = socket.INADDR_ANY

2001

1667

self.server_address = (any_address,

2002

1668

self.server_address[1])

2003

1669

elif not self.server_address[1]:

2024

1690

"""

2025

1691

def __init__(self, server_address, RequestHandlerClass,

2026

1692

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

2027

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

1693

gnutls_priority=None, use_dbus=True):

2028

1694

self.enabled = False

2029

1695

self.clients = clients

2030

1696

if self.clients is None:

2034

1700

IPv6_TCPServer.__init__(self, server_address,

2035

1701

RequestHandlerClass,

2036

1702

interface = interface,

2037

use_ipv6 = use_ipv6,

2038

socketfd = socketfd)

1703

use_ipv6 = use_ipv6)

2039

1704

def server_activate(self):

2040

1705

if self.enabled:

2041

1706

return socketserver.TCPServer.server_activate(self)

2054

1719

2055

1720

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

2056

1721

proc = None, client_object=None):

1722

condition_names = {

1723

gobject.IO_IN: "IN", # There is data to read.

1724

gobject.IO_OUT: "OUT", # Data can be written (without

1725

# blocking).

1726

gobject.IO_PRI: "PRI", # There is urgent data to read.

1727

gobject.IO_ERR: "ERR", # Error condition.

1728

gobject.IO_HUP: "HUP" # Hung up (the connection has been

1729

# broken, usually for pipes and

1730

# sockets).

1731

}

1732

conditions_string = ' | '.join(name

1733

for cond, name in

1734

condition_names.iteritems()

1735

if cond & condition)

2057

1736

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

2058

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

1737

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

2059

1738

# Wait for other process to exit

2060

1739

proc.join()

2061

1740

return False

2119

1798

return True

2120

1799

2121

1800

2122

def rfc3339_duration_to_delta(duration):

2123

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

2124

2125

>>> rfc3339_duration_to_delta("P7D")

2126

datetime.timedelta(7)

2127

>>> rfc3339_duration_to_delta("PT60S")

2128

datetime.timedelta(0, 60)

2129

>>> rfc3339_duration_to_delta("PT60M")

2130

datetime.timedelta(0, 3600)

2131

>>> rfc3339_duration_to_delta("PT24H")

2132

datetime.timedelta(1)

2133

>>> rfc3339_duration_to_delta("P1W")

2134

datetime.timedelta(7)

2135

>>> rfc3339_duration_to_delta("PT5M30S")

2136

datetime.timedelta(0, 330)

2137

>>> rfc3339_duration_to_delta("P1DT3M20S")

2138

datetime.timedelta(1, 200)

2139

"""

2140

2141

# Parsing an RFC 3339 duration with regular expressions is not

2142

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

2143

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

2144

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

2145

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

2146

# avoid excessive use of external libraries.

2147

2148

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

2149

Token = collections.namedtuple("Token",

2150

("regexp", # To match token; if

2151

# "value" is not None,

2152

# must have a "group"

2153

# containing digits

2154

"value", # datetime.timedelta or

2155

# None

2156

"followers")) # Tokens valid after

2157

# this token

2158

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

2159

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

2160

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

2161

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

2162

datetime.timedelta(seconds=1),

2163

frozenset((token_end,)))

2164

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

2165

datetime.timedelta(minutes=1),

2166

frozenset((token_second, token_end)))

2167

token_hour = Token(re.compile(r"(\d+)H"),

2168

datetime.timedelta(hours=1),

2169

frozenset((token_minute, token_end)))

2170

token_time = Token(re.compile(r"T"),

2171

None,

2172

frozenset((token_hour, token_minute,

2173

token_second)))

2174

token_day = Token(re.compile(r"(\d+)D"),

2175

datetime.timedelta(days=1),

2176

frozenset((token_time, token_end)))

2177

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

2178

datetime.timedelta(weeks=4),

2179

frozenset((token_day, token_end)))

2180

token_year = Token(re.compile(r"(\d+)Y"),

2181

datetime.timedelta(weeks=52),

2182

frozenset((token_month, token_end)))

2183

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

2184

datetime.timedelta(weeks=1),

2185

frozenset((token_end,)))

2186

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

2187

frozenset((token_year, token_month,

2188

token_day, token_time,

2189

token_week))),

2190

# Define starting values

2191

value = datetime.timedelta() # Value so far

2192

found_token = None

2193

followers = frozenset(token_duration,) # Following valid tokens

2194

s = duration # String left to parse

2195

# Loop until end token is found

2196

while found_token is not token_end:

2197

# Search for any currently valid tokens

2198

for token in followers:

2199

match = token.regexp.match(s)

2200

if match is not None:

2201

# Token found

2202

if token.value is not None:

2203

# Value found, parse digits

2204

factor = int(match.group(1), 10)

2205

# Add to value so far

2206

value += factor * token.value

2207

# Strip token from string

2208

s = token.regexp.sub("", s, 1)

2209

# Go to found token

2210

found_token = token

2211

# Set valid next tokens

2212

followers = found_token.followers

2213

break

2214

else:

2215

# No currently valid tokens were found

2216

raise ValueError("Invalid RFC 3339 duration")

2217

# End token found

2218

return value

2219

2220

2221

1801

def string_to_delta(interval):

2222

1802

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

2223

1803

2234

1814

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

2235

1815

datetime.timedelta(0, 330)

2236

1816

"""

2237

2238

try:

2239

return rfc3339_duration_to_delta(interval)

2240

except ValueError:

2241

pass

2242

2243

1817

timevalue = datetime.timedelta(0)

2244

1818

for s in interval.split():

2245

1819

try:

2256

1830

elif suffix == "w":

2257

1831

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

2258

1832

else:

2259

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

2260

.format(suffix))

1833

raise ValueError("Unknown suffix %r" % suffix)

2261

1834

except (ValueError, IndexError) as e:

2262

1835

raise ValueError(*(e.args))

2263

1836

timevalue += delta

2264

1837

return timevalue

2265

1838

2266

1839

1840

def if_nametoindex(interface):

1841

"""Call the C function if_nametoindex(), or equivalent

1842

1843

Note: This function cannot accept a unicode string."""

1844

global if_nametoindex

1845

try:

1846

if_nametoindex = (ctypes.cdll.LoadLibrary

1847

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

1848

.if_nametoindex)

1849

except (OSError, AttributeError):

1850

logger.warning("Doing if_nametoindex the hard way")

1851

def if_nametoindex(interface):

1852

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

1853

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

1854

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

1855

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1856

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

1857

interface))

1858

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

1859

ifreq[16:20])[0]

1860

return interface_index

1861

return if_nametoindex(interface)

1862

1863

2267

1864

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

2268

1865

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

2269

1866

2277

1874

sys.exit()

2278

1875

if not noclose:

2279

1876

# Close all standard open file descriptors

2280

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

1877

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

2281

1878

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

2282

1879

raise OSError(errno.ENODEV,

2283

"{0} not a character device"

2284

.format(os.devnull))

1880

"%s not a character device"

1881

% os.path.devnull)

2285

1882

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

2286

1883

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

2287

1884

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

2296

1893

2297

1894

parser = argparse.ArgumentParser()

2298

1895

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

2299

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

1896

version = "%%(prog)s %s" % version,

2300

1897

help="show version number and exit")

2301

1898

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

2302

1899

help="Bind to interface IF")

2308

1905

help="Run self-test")

2309

1906

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

2310

1907

help="Debug mode; run in foreground and log"

2311

" to terminal", default=None)

1908

" to terminal")

2312

1909

parser.add_argument("--debuglevel", metavar="LEVEL",

2313

1910

help="Debug level for stdout output")

2314

1911

parser.add_argument("--priority", help="GnuTLS"

2321

1918

" files")

2322

1919

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

2323

1920

dest="use_dbus", help="Do not provide D-Bus"

2324

" system bus interface", default=None)

1921

" system bus interface")

2325

1922

parser.add_argument("--no-ipv6", action="store_false",

2326

dest="use_ipv6", help="Do not use IPv6",

2327

default=None)

1923

dest="use_ipv6", help="Do not use IPv6")

2328

1924

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

2329

dest="restore", help="Do not restore stored"

2330

" state", default=None)

2331

parser.add_argument("--socket", type=int,

2332

help="Specify a file descriptor to a network"

2333

" socket to use instead of creating one")

2334

parser.add_argument("--statedir", metavar="DIR",

2335

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

2336

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

2337

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

2338

1925

dest="restore", help="Do not restore stored state",

1926

default=True)

1927

2339

1928

options = parser.parse_args()

2340

1929

2341

1930

if options.check:

2349

1938

"port": "",

2350

1939

"debug": "False",

2351

1940

"priority":

2352

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

1941

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

2353

1942

"servicename": "Mandos",

2354

1943

"use_dbus": "True",

2355

1944

"use_ipv6": "True",

2356

1945

"debuglevel": "",

2357

"restore": "True",

2358

"socket": "",

2359

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

2360

"foreground": "False",

2361

1946

}

2362

1947

2363

1948

# Parse config file for server-global settings

2368

1953

# Convert the SafeConfigParser object to a dict

2369

1954

server_settings = server_config.defaults()

2370

1955

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

2371

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

1956

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

2372

1957

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

2373

1958

option)

2374

1959

if server_settings["port"]:

2375

1960

server_settings["port"] = server_config.getint("DEFAULT",

2376

1961

"port")

2377

if server_settings["socket"]:

2378

server_settings["socket"] = server_config.getint("DEFAULT",

2379

"socket")

2380

# Later, stdin will, and stdout and stderr might, be dup'ed

2381

# over with an opened os.devnull. But we don't want this to

2382

# happen with a supplied network socket.

2383

if 0 <= server_settings["socket"] <= 2:

2384

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

2385

["socket"])

2386

1962

del server_config

2387

1963

2388

1964

# Override the settings from the config file with command line

2389

1965

# options, if set.

2390

1966

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

2391

1967

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

2392

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

2393

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

1968

"use_dbus", "use_ipv6", "debuglevel", "restore"):

2394

1969

value = getattr(options, option)

2395

1970

if value is not None:

2396

1971

server_settings[option] = value

2399

1974

for option in server_settings.keys():

2400

1975

if type(server_settings[option]) is str:

2401

1976

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

2402

# Force all boolean options to be boolean

2403

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

2404

"foreground"):

2405

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

2406

# Debug implies foreground

2407

if server_settings["debug"]:

2408

server_settings["foreground"] = True

2409

1977

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

2410

1978

2411

1979

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

2415

1983

debuglevel = server_settings["debuglevel"]

2416

1984

use_dbus = server_settings["use_dbus"]

2417

1985

use_ipv6 = server_settings["use_ipv6"]

2418

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

2419

stored_state_file)

2420

foreground = server_settings["foreground"]

2421

2422

if debug:

2423

initlogger(debug, logging.DEBUG)

2424

else:

2425

if not debuglevel:

2426

initlogger(debug)

2427

else:

2428

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

2429

initlogger(debug, level)

2430

1986

2431

1987

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

2432

1988

syslogger.setFormatter(logging.Formatter

2433

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

2434

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

2435

.format(server_settings

2436

["servicename"])))

1989

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

1990

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

1991

% server_settings["servicename"]))

2437

1992

2438

1993

# Parse config file with clients

2439

client_config = configparser.SafeConfigParser(Client

2440

.client_defaults)

1994

client_defaults = { "timeout": "5m",

1995

"extended_timeout": "15m",

1996

"interval": "2m",

1997

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

1998

"host": "",

1999

"approval_delay": "0s",

2000

"approval_duration": "1s",

2001

}

2002

client_config = configparser.SafeConfigParser(client_defaults)

2441

2003

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

2442

2004

"clients.conf"))

2443

2005

2452

2014

use_ipv6=use_ipv6,

2453

2015

gnutls_priority=

2454

2016

server_settings["priority"],

2455

use_dbus=use_dbus,

2456

socketfd=(server_settings["socket"]

2457

or None))

2458

if not foreground:

2459

pidfilename = "/run/mandos.pid"

2460

pidfile = None

2017

use_dbus=use_dbus)

2018

if not debug:

2019

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

2461

2020

try:

2462

2021

pidfile = open(pidfilename, "w")

2463

except IOError as e:

2464

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

2465

exc_info=e)

2022

except IOError:

2023

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

2466

2024

2467

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

2025

try:

2026

uid = pwd.getpwnam("_mandos").pw_uid

2027

gid = pwd.getpwnam("_mandos").pw_gid

2028

except KeyError:

2468

2029

try:

2469

uid = pwd.getpwnam(name).pw_uid

2470

gid = pwd.getpwnam(name).pw_gid

2471

break

2030

uid = pwd.getpwnam("mandos").pw_uid

2031

gid = pwd.getpwnam("mandos").pw_gid

2472

2032

except KeyError:

2473

continue

2474

else:

2475

uid = 65534

2476

gid = 65534

2033

try:

2034

uid = pwd.getpwnam("nobody").pw_uid

2035

gid = pwd.getpwnam("nobody").pw_gid

2036

except KeyError:

2037

uid = 65534

2038

gid = 65534

2477

2039

try:

2478

2040

os.setgid(gid)

2479

2041

os.setuid(uid)

2480

2042

except OSError as error:

2481

if error.errno != errno.EPERM:

2043

if error[0] != errno.EPERM:

2482

2044

raise error

2483

2045

2046

if not debug and not debuglevel:

2047

logger.setLevel(logging.WARNING)

2048

if debuglevel:

2049

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

2050

logger.setLevel(level)

2051

2484

2052

if debug:

2053

logger.setLevel(logging.DEBUG)

2485

2054

# Enable all possible GnuTLS debugging

2486

2055

2487

2056

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

2496

2065

.gnutls_global_set_log_function(debug_gnutls))

2497

2066

2498

2067

# Redirect stdin so all checkers get /dev/null

2499

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

2068

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

2500

2069

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

2501

2070

if null > 2:

2502

2071

os.close(null)

2072

else:

2073

# No console logging

2074

logger.removeHandler(console)

2503

2075

2504

2076

# Need to fork before connecting to D-Bus

2505

if not foreground:

2077

if not debug:

2506

2078

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

2507

2079

daemon()

2508

2080

2509

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

2510

# need to inform gobject that threads will be used.

2511

gobject.threads_init()

2512

2513

2081

global main_loop

2514

2082

# From the Avahi example code

2515

DBusGMainLoop(set_as_default=True)

2083

DBusGMainLoop(set_as_default=True )

2516

2084

main_loop = gobject.MainLoop()

2517

2085

bus = dbus.SystemBus()

2518

2086

# End of Avahi example code

2524

2092

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

2525

2093

do_not_queue=True))

2526

2094

except dbus.exceptions.NameExistsException as e:

2527

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

2095

logger.error(unicode(e) + ", disabling D-Bus")

2528

2096

use_dbus = False

2529

2097

server_settings["use_dbus"] = False

2530

2098

tcp_server.use_dbus = False

2542

2110

2543

2111

client_class = Client

2544

2112

if use_dbus:

2545

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

2546

2547

client_settings = Client.config_parser(client_config)

2113

client_class = functools.partial(ClientDBusTransitional,

2114

bus = bus)

2115

2116

special_settings = {

2117

# Some settings need to be accessd by special methods;

2118

# booleans need .getboolean(), etc. Here is a list of them:

2119

"approved_by_default":

2120

lambda section:

2121

client_config.getboolean(section, "approved_by_default"),

2122

}

2123

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

2124

# { client_name: {setting_name: value, ...}, ...}

2125

# with exceptions for any special settings as defined above

2126

client_settings = dict((clientname,

2127

dict((setting,

2128

(value if setting not in special_settings

2129

else special_settings[setting](clientname)))

2130

for setting, value in client_config.items(clientname)))

2131

for clientname in client_config.sections())

2132

2548

2133

old_client_settings = {}

2549

clients_data = {}

2550

2551

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

2552

global wnull

2553

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

2554

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

2555

# mode

2556

if debug or not foreground:

2557

wnull.close()

2558

2559

# Get client data and settings from last running state.

2134

clients_data = []

2135

2136

# Get client data and settings from last running state.

2560

2137

if server_settings["restore"]:

2561

2138

try:

2562

2139

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

2563

clients_data, old_client_settings = (pickle.load

2564

(stored_state))

2140

clients_data, old_client_settings = pickle.load(stored_state)

2565

2141

os.remove(stored_state_path)

2566

2142

except IOError as e:

2567

if e.errno == errno.ENOENT:

2568

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

2569

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

2570

else:

2571

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

2572

exc_info=e)

2143

logger.warning("Could not load persistant state: {0}".format(e))

2144

if e.errno != errno.ENOENT:

2573

2145

raise

2574

except EOFError as e:

2575

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

2576

"EOFError:", exc_info=e)

2577

2578

with PGPEngine() as pgp:

2579

for client_name, client in clients_data.iteritems():

2580

# Skip removed clients

2581

if client_name not in client_settings:

2582

continue

2583

2584

# Decide which value to use after restoring saved state.

2585

# We have three different values: Old config file,

2586

# new config file, and saved state.

2587

# New config value takes precedence if it differs from old

2588

# config value, otherwise use saved state.

2589

for name, value in client_settings[client_name].items():

2590

try:

2591

# For each value in new config, check if it

2592

# differs from the old config value (Except for

2593

# the "secret" attribute)

2594

if (name != "secret" and

2595

value != old_client_settings[client_name]

2596

[name]):

2597

client[name] = value

2598

except KeyError:

2599

pass

2600

2601

# Clients who has passed its expire date can still be

2602

# enabled if its last checker was successful. Clients

2603

# whose checker succeeded before we stored its state is

2604

# assumed to have successfully run all checkers during

2605

# downtime.

2606

if client["enabled"]:

2607

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

2608

if not client["last_checked_ok"]:

2609

logger.warning(

2610

"disabling client {0} - Client never "

2611

"performed a successful checker"

2612

.format(client_name))

2613

client["enabled"] = False

2614

elif client["last_checker_status"] != 0:

2615

logger.warning(

2616

"disabling client {0} - Client "

2617

"last checker failed with error code {1}"

2618

.format(client_name,

2619

client["last_checker_status"]))

2620

client["enabled"] = False

2621

else:

2622

client["expires"] = (datetime.datetime

2623

.utcnow()

2624

+ client["timeout"])

2625

logger.debug("Last checker succeeded,"

2626

" keeping {0} enabled"

2627

.format(client_name))

2146

2147

for client in clients_data:

2148

client_name = client["name"]

2149

2150

# Decide which value to use after restoring saved state.

2151

# We have three different values: Old config file,

2152

# new config file, and saved state.

2153

# New config value takes precedence if it differs from old

2154

# config value, otherwise use saved state.

2155

for name, value in client_settings[client_name].items():

2628

2156

try:

2629

client["secret"] = (

2630

pgp.decrypt(client["encrypted_secret"],

2631

client_settings[client_name]

2632

["secret"]))

2633

except PGPError:

2634

# If decryption fails, we use secret from new settings

2635

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

2636

.format(client_name))

2637

client["secret"] = (

2638

client_settings[client_name]["secret"])

2639

2640

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

2641

for client_name in (set(old_client_settings)

2642

- set(client_settings)):

2643

del clients_data[client_name]

2644

for client_name in (set(client_settings)

2645

- set(old_client_settings)):

2646

clients_data[client_name] = client_settings[client_name]

2647

2648

# Create all client objects

2649

for client_name, client in clients_data.iteritems():

2650

tcp_server.clients[client_name] = client_class(

2651

name = client_name, settings = client,

2652

server_settings = server_settings)

2653

2157

# For each value in new config, check if it differs

2158

# from the old config value (Except for the "secret"

2159

# attribute)

2160

if name != "secret" and value != old_client_settings[client_name][name]:

2161

setattr(client, name, value)

2162

except KeyError:

2163

pass

2164

2165

# Clients who has passed its expire date, can still be enabled if its

2166

# last checker was sucessful. Clients who checkers failed before we

2167

# stored it state is asumed to had failed checker during downtime.

2168

if client["enabled"] and client["last_checked_ok"]:

2169

if ((datetime.datetime.utcnow() - client["last_checked_ok"])

2170

> client["interval"]):

2171

if client["last_checker_status"] != 0:

2172

client["enabled"] = False

2173

else:

2174

client["expires"] = datetime.datetime.utcnow() + client["timeout"]

2175

2176

client["changedstate"] = (multiprocessing_manager

2177

.Condition(multiprocessing_manager

2178

.Lock()))

2179

if use_dbus:

2180

new_client = ClientDBusTransitional.__new__(ClientDBusTransitional)

2181

tcp_server.clients[client_name] = new_client

2182

new_client.bus = bus

2183

for name, value in client.iteritems():

2184

setattr(new_client, name, value)

2185

client_object_name = unicode(client_name).translate(

2186

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

2187

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

2188

new_client.dbus_object_path = (dbus.ObjectPath

2189

("/clients/" + client_object_name))

2190

DBusObjectWithProperties.__init__(new_client,

2191

new_client.bus,

2192

new_client.dbus_object_path)

2193

else:

2194

tcp_server.clients[client_name] = Client.__new__(Client)

2195

for name, value in client.iteritems():

2196

setattr(tcp_server.clients[client_name], name, value)

2197

2198

tcp_server.clients[client_name].decrypt_secret(

2199

client_settings[client_name]["secret"])

2200

2201

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

2202

for clientname in set(old_client_settings) - set(client_settings):

2203

del tcp_server.clients[clientname]

2204

for clientname in set(client_settings) - set(old_client_settings):

2205

tcp_server.clients[clientname] = (client_class(name = clientname,

2206

config =

2207

client_settings

2208

[clientname]))

2209

2210

2654

2211

if not tcp_server.clients:

2655

2212

logger.warning("No clients defined")

2656

2657

if not foreground:

2658

if pidfile is not None:

2659

try:

2660

with pidfile:

2661

pid = os.getpid()

2662

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

2663

except IOError:

2664

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

2665

pidfilename, pid)

2666

del pidfile

2213

2214

if not debug:

2215

try:

2216

with pidfile:

2217

pid = os.getpid()

2218

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

2219

del pidfile

2220

except IOError:

2221

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

2222

pidfilename, pid)

2223

except NameError:

2224

# "pidfile" was never created

2225

pass

2667

2226

del pidfilename

2227

2228

signal.signal(signal.SIGINT, signal.SIG_IGN)

2668

2229

2669

2230

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

2670

2231

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

2671

2232

2672

2233

if use_dbus:

2673

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

2674

"se.bsnet.fukt.Mandos"})

2675

class MandosDBusService(DBusObjectWithProperties):

2234

class MandosDBusService(dbus.service.Object):

2676

2235

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

2677

2236

def __init__(self):

2678

2237

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

2679

2238

_interface = "se.recompile.Mandos"

2680

2239

2681

@dbus_interface_annotations(_interface)

2682

def _foo(self):

2683

return { "org.freedesktop.DBus.Property"

2684

".EmitsChangedSignal":

2685

"false"}

2686

2687

2240

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

2688

2241

def ClientAdded(self, objpath):

2689

2242

"D-Bus signal"

2731

2284

2732

2285

del _interface

2733

2286

2734

mandos_dbus_service = MandosDBusService()

2287

class MandosDBusServiceTransitional(MandosDBusService):

2288

__metaclass__ = AlternateDBusNamesMetaclass

2289

mandos_dbus_service = MandosDBusServiceTransitional()

2735

2290

2736

2291

def cleanup():

2737

2292

"Cleanup function; run on exit"

2738

2293

service.cleanup()

2739

2294

2740

2295

multiprocessing.active_children()

2741

wnull.close()

2742

2296

if not (tcp_server.clients or client_settings):

2743

2297

return

2744

2745

# Store client before exiting. Secrets are encrypted with key

2746

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

2747

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

2748

clients = {}

2749

with PGPEngine() as pgp:

2750

for client in tcp_server.clients.itervalues():

2751

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

2752

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

2753

key)

2754

client_dict = {}

2755

2756

# A list of attributes that can not be pickled

2757

# + secret.

2758

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

2759

"checker", "server_settings"))

2760

for name, typ in (inspect.getmembers

2761

(dbus.service.Object)):

2762

exclude.add(name)

2763

2764

client_dict["encrypted_secret"] = (client

2765

.encrypted_secret)

2766

for attr in client.client_structure:

2767

if attr not in exclude:

2768

client_dict[attr] = getattr(client, attr)

2769

2770

clients[client.name] = client_dict

2771

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

2772

2298

2299

# Store client before exiting. Secrets are encrypted with key based

2300

# on what config file has. If config file is removed/edited, old

2301

# secret will thus be unrecovable.

2302

clients = []

2303

for client in tcp_server.clients.itervalues():

2304

client.encrypt_secret(client_settings[client.name]["secret"])

2305

2306

client_dict = {}

2307

2308

# A list of attributes that will not be stored when shuting down.

2309

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

2310

for name, typ in inspect.getmembers(dbus.service.Object):

2311

exclude.add(name)

2312

2313

client_dict["encrypted_secret"] = client.encrypted_secret

2314

for attr in client.client_structure:

2315

if attr not in exclude:

2316

client_dict[attr] = getattr(client, attr)

2317

2318

clients.append(client_dict)

2319

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

2320

2773

2321

try:

2774

with (tempfile.NamedTemporaryFile

2775

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

2776

dir=os.path.dirname(stored_state_path),

2777

delete=False)) as stored_state:

2322

with os.fdopen(os.open(stored_state_path, os.O_CREAT|os.O_WRONLY|os.O_TRUNC, 0600), "wb") as stored_state:

2778

2323

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

2779

tempname=stored_state.name

2780

os.rename(tempname, stored_state_path)

2781

except (IOError, OSError) as e:

2782

if not debug:

2783

try:

2784

os.remove(tempname)

2785

except NameError:

2786

pass

2787

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

2788

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

2789

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

2790

else:

2791

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

2792

exc_info=e)

2793

raise e

2794

2324

except IOError as e:

2325

logger.warning("Could not save persistant state: {0}".format(e))

2326

if e.errno != errno.ENOENT:

2327

raise

2328

2795

2329

# Delete all clients, and settings from config

2796

2330

while tcp_server.clients:

2797

2331

name, client = tcp_server.clients.popitem()

2815

2349

# Need to initiate checking of clients

2816

2350

if client.enabled:

2817

2351

client.init_checker()

2352

2818

2353

2819

2354

tcp_server.enable()

2820

2355

tcp_server.server_activate()

2823

2358

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

2824

2359

if use_ipv6:

2825

2360

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

2826

" flowinfo %d, scope_id %d",

2827

*tcp_server.socket.getsockname())

2361

" flowinfo %d, scope_id %d"

2362

% tcp_server.socket.getsockname())

2828

2363

else: # IPv4

2829

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

2830

*tcp_server.socket.getsockname())

2364

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

2365

% tcp_server.socket.getsockname())

2831

2366

2832

2367

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

2833

2368

2836

2371

try:

2837

2372

service.activate()

2838

2373

except dbus.exceptions.DBusException as error:

2839

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

2374

logger.critical("DBusException: %s", error)

2840

2375

cleanup()

2841

2376

sys.exit(1)

2842

2377

# End of Avahi example code

2849

2384

logger.debug("Starting main loop")

2850

2385

main_loop.run()

2851

2386

except AvahiError as error:

2852

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

2387

logger.critical("AvahiError: %s", error)

2853

2388

cleanup()

2854

2389

sys.exit(1)

2855

2390

except KeyboardInterrupt:

2860

2395

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

2861

2396

cleanup()

2862

2397

2398

2863

2399

if __name__ == '__main__':

2864

2400

main()