/mandos/trunk : revision 738.1.2

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#!/usr/bin/python

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#!/usr/bin/python2.7

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

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#

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

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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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# along with this program. If not, see

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

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#

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# Contact the authors at <mandos@fukt.bsnet.se>.

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

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#

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from __future__ import (division, absolute_import, print_function,

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unicode_literals)

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from future_builtins import *

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import SocketServer as socketserver

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import socket

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import argparse

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import functools

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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 dbus

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import dbus.service

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except ImportError:

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SO_BINDTODEVICE = None

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version = "1.3.0"

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#logger = logging.getLogger('mandos')

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logger = logging.Logger('mandos')

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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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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('%(name)s [%(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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if sys.version_info.major == 2:

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str = unicode

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version = "1.6.9"

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stored_state_file = "clients.pickle"

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logger = logging.getLogger()

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syslogger = None

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try:

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if_nametoindex = (ctypes.cdll.LoadLibrary

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

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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(b"16s16x", interface))

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interface_index = struct.unpack("I", 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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global syslogger

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syslogger = (logging.handlers.SysLogHandler

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(facility =

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logging.handlers.SysLogHandler.LOG_DAEMON,

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address = "/dev/log"))

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syslogger.setFormatter(logging.Formatter

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

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' %(message)s'))

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logger.addHandler(syslogger)

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if debug:

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console = logging.StreamHandler()

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

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' [%(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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class AvahiError(Exception):

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

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self.value = value

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super(AvahiError, self).__init__(value, *args, **kwargs)

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def __unicode__(self):

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return unicode(repr(self.value))

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return super(AvahiError, self).__init__(value, *args,

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**kwargs)

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class AvahiServiceError(AvahiError):

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pass

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

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

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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.group = None # our entry group

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self.server = None

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self.bus = bus

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def rename(self):

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self.entry_group_state_changed_match = None

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def rename(self, remove=True):

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

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if self.rename_count >= self.max_renames:

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logger.critical("No suitable Zeroconf service name found"

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" after %i retries, exiting.",

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self.rename_count)

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raise AvahiServiceError("Too many renames")

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self.name = unicode(self.server.GetAlternativeServiceName(self.name))

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self.name = str(self.server

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.GetAlternativeServiceName(self.name))

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self.rename_count += 1

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logger.info("Changing Zeroconf service name to %r ...",

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self.name)

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syslogger.setFormatter(logging.Formatter

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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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self.remove()

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if remove:

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self.remove()

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try:

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self.add()

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except dbus.exceptions.DBusException, 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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except dbus.exceptions.DBusException as error:

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if (error.get_dbus_name()

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== "org.freedesktop.Avahi.CollisionError"):

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logger.info("Local Zeroconf service name collision.")

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return self.rename(remove=False)

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else:

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

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self.cleanup()

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os._exit(1)

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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.remove()

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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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if self.group is None:

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self.group = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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self.server.EntryGroupNew()),

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avahi.DBUS_INTERFACE_ENTRY_GROUP)

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self.group.connect_to_signal('StateChanged',

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self

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.entry_group_state_changed)

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self.entry_group_state_changed_match = (

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self.group.connect_to_signal(

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'StateChanged', self.entry_group_state_changed))

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logger.debug("Adding Zeroconf service '%s' of type '%s' ...",

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self.name, self.type)

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self.group.AddService(

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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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self.rename()

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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: %s"

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% unicode(error))

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str(error))

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

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.format(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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self.group.Free()

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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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pass

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self.group = None

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def server_state_changed(self, state):

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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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if state == avahi.SERVER_COLLISION:

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logger.error("Zeroconf server name collision")

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self.remove()

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bad_states = { avahi.SERVER_INVALID:

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"Zeroconf server invalid",

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avahi.SERVER_REGISTERING: None,

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avahi.SERVER_COLLISION:

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"Zeroconf server name collision",

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avahi.SERVER_FAILURE:

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"Zeroconf server failure" }

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if state in bad_states:

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if bad_states[state] is not None:

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if error is None:

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logger.error(bad_states[state])

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else:

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logger.error(bad_states[state] + ": %r", error)

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self.cleanup()

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elif state == avahi.SERVER_RUNNING:

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self.add()

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else:

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if error is None:

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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 = dbus.Interface(

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self.bus.get_object(avahi.DBUS_NAME,

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avahi.DBUS_PATH_SERVER),

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avahi.DBUS_PATH_SERVER,

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follow_name_owner_changes=True),

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avahi.DBUS_INTERFACE_SERVER)

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self.server.connect_to_signal("StateChanged",

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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, *args, **kwargs):

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

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

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syslogger.setFormatter(logging.Formatter

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

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

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.format(self.name)))

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return ret

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

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checker_initiator_tag: a gobject event source tag, or None

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

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client_structure: Object describing what attributes a client has

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and is used for storing the client at exit

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current_checker_command: string; current running checker_command

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disable_hook: If set, called by disable() as disable_hook(self)

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disable_initiator_tag: a gobject event source tag, or None

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enabled: bool()

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

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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_enabled: datetime.datetime(); (UTC)

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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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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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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", "fingerprint",

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

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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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"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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@staticmethod

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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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def timeout_milliseconds(self):

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"Return the 'timeout' attribute in milliseconds"

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return self._timedelta_to_milliseconds(self.timeout)

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def interval_milliseconds(self):

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"Return the 'interval' attribute in milliseconds"

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return self._timedelta_to_milliseconds(self.interval)

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def approval_delay_milliseconds(self):

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return self._timedelta_to_milliseconds(self.approval_delay)

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def __init__(self, name = None, disable_hook=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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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 {}"

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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):

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self.name = name

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if config is None:

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config = {}

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if server_settings is None:

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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.items():

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setattr(self, setting, value)

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if self.enabled:

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if not hasattr(self, "last_enabled"):

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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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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

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

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.replace(" ", ""))

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

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if "secret" in config:

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

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elif "secfile" in config:

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

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(config["secfile"])),

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"rb") as secfile:

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self.secret = secfile.read()

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else:

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

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% self.name)

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

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self.created = datetime.datetime.utcnow()

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self.enabled = False

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self.last_approval_request = None

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self.last_enabled = None

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self.last_checked_ok = None

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

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

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self.disable_hook = disable_hook

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

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datetime.datetime.utcnow())

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# attributes specific for this server instance

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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

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self.checker_callback_tag = None

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self.checker_command = config["checker"]

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self.current_checker_command = None

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self.last_connect = None

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self._approved = None

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

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True)

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self.approved = None

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self.approvals_pending = 0

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self.approval_delay = string_to_delta(

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config["approval_delay"])

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self.approval_duration = string_to_delta(

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config["approval_duration"])

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self.changedstate = multiprocessing_manager.Condition(multiprocessing_manager.Lock())

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self.changedstate = (multiprocessing_manager

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.Condition(multiprocessing_manager

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.Lock()))

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self.client_structure = [attr for attr in

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self.__dict__.iterkeys()

557

if not attr.startswith("_")]

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self.client_structure.append("client_structure")

559

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

561

lambda obj:

562

isinstance(obj,

563

property)):

564

if not name.startswith("_"):

565

self.client_structure.append(name)

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# Send notice to process children that client state has changed

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def send_changedstate(self):

350

self.changedstate.acquire()

351

self.changedstate.notify_all()

352

self.changedstate.release()

353

569

with self.changedstate:

570

self.changedstate.notify_all()

571

354

572

def enable(self):

355

573

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

356

574

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

357

575

# Already enabled

358

576

return

359

self.send_changedstate()

577

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

578

self.enabled = True

360

579

self.last_enabled = datetime.datetime.utcnow()

361

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

362

# and every interval from then on.

363

self.checker_initiator_tag = (gobject.timeout_add

364

(self.interval_milliseconds(),

365

self.start_checker))

366

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

367

self.disable_initiator_tag = (gobject.timeout_add

368

(self.timeout_milliseconds(),

369

self.disable))

370

self.enabled = True

371

# Also start a new checker *right now*.

372

self.start_checker()

580

self.init_checker()

581

self.send_changedstate()

373

582

374

583

def disable(self, quiet=True):

375

584

"""Disable this client."""

376

585

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

377

586

return False

378

587

if not quiet:

379

self.send_changedstate()

380

if not quiet:

381

588

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

382

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

589

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

383

590

gobject.source_remove(self.disable_initiator_tag)

384

591

self.disable_initiator_tag = None

385

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

592

self.expires = None

593

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

386

594

gobject.source_remove(self.checker_initiator_tag)

387

595

self.checker_initiator_tag = None

388

596

self.stop_checker()

389

if self.disable_hook:

390

self.disable_hook(self)

391

597

self.enabled = False

598

if not quiet:

599

self.send_changedstate()

392

600

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

393

601

return False

394

602

395

603

def __del__(self):

396

self.disable_hook = None

397

604

self.disable()

398

605

606

def init_checker(self):

607

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

608

# and every interval from then on.

609

if self.checker_initiator_tag is not None:

610

gobject.source_remove(self.checker_initiator_tag)

611

self.checker_initiator_tag = (gobject.timeout_add

612

(int(self.interval

613

.total_seconds() * 1000),

614

self.start_checker))

615

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

616

if self.disable_initiator_tag is not None:

617

gobject.source_remove(self.disable_initiator_tag)

618

self.disable_initiator_tag = (gobject.timeout_add

619

(int(self.timeout

620

.total_seconds() * 1000),

621

self.disable))

622

# Also start a new checker *right now*.

623

self.start_checker()

624

399

625

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

400

626

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

401

627

self.checker_callback_tag = None

402

628

self.checker = None

403

629

if os.WIFEXITED(condition):

404

exitstatus = os.WEXITSTATUS(condition)

405

if exitstatus == 0:

630

self.last_checker_status = os.WEXITSTATUS(condition)

631

if self.last_checker_status == 0:

406

632

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

407

633

vars(self))

408

634

self.checked_ok()

410

636

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

411

637

vars(self))

412

638

else:

639

self.last_checker_status = -1

413

640

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

414

641

vars(self))

415

642

416

643

def checked_ok(self):

417

"""Bump up the timeout for this client.

418

419

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

420

alive and well.

421

"""

644

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

422

645

self.last_checked_ok = datetime.datetime.utcnow()

423

gobject.source_remove(self.disable_initiator_tag)

424

self.disable_initiator_tag = (gobject.timeout_add

425

(self.timeout_milliseconds(),

426

self.disable))

646

self.last_checker_status = 0

647

self.bump_timeout()

648

649

def bump_timeout(self, timeout=None):

650

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

651

if timeout is None:

652

timeout = self.timeout

653

if self.disable_initiator_tag is not None:

654

gobject.source_remove(self.disable_initiator_tag)

655

self.disable_initiator_tag = None

656

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

657

self.disable_initiator_tag = (gobject.timeout_add

658

(int(timeout.total_seconds()

659

* 1000), self.disable))

660

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

427

661

428

662

def need_approval(self):

429

663

self.last_approval_request = datetime.datetime.utcnow()

434

668

If a checker already exists, leave it running and do

435

669

nothing."""

436

670

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

437

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

438

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

439

# client would inevitably timeout, since no checker would get

440

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

671

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

672

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

673

# would inevitably timeout, since no checker would get a

674

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

441

675

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

442

676

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

443

677

# should be.

445

679

# If a checker exists, make sure it is not a zombie

446

680

try:

447

681

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

448

except (AttributeError, OSError), error:

449

if (isinstance(error, OSError)

450

and error.errno != errno.ECHILD):

451

raise error

682

except AttributeError:

683

pass

684

except OSError as error:

685

if error.errno != errno.ECHILD:

686

raise

452

687

else:

453

688

if pid:

454

689

logger.warning("Checker was a zombie")

457

692

self.current_checker_command)

458

693

# Start a new checker if needed

459

694

if self.checker is None:

695

# Escape attributes for the shell

696

escaped_attrs = { attr:

697

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

698

for attr in self.runtime_expansions }

460

699

try:

461

# In case checker_command has exactly one % operator

462

command = self.checker_command % self.host

463

except TypeError:

464

# Escape attributes for the shell

465

escaped_attrs = dict(

466

(attr,

467

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

468

errors=

469

'replace')))

470

for attr in

471

self.runtime_expansions)

472

473

try:

474

command = self.checker_command % escaped_attrs

475

except TypeError, error:

476

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

477

' %s', self.checker_command, error)

478

return True # Try again later

700

command = self.checker_command % escaped_attrs

701

except TypeError as error:

702

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

703

self.checker_command, exc_info=error)

704

return True # Try again later

479

705

self.current_checker_command = command

480

706

try:

481

707

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

484

710

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

485

711

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

486

712

# always replaced by /dev/null.)

713

# The exception is when not debugging but nevertheless

714

# running in the foreground; use the previously

715

# created wnull.

716

popen_args = {}

717

if (not self.server_settings["debug"]

718

and self.server_settings["foreground"]):

719

popen_args.update({"stdout": wnull,

720

"stderr": wnull })

487

721

self.checker = subprocess.Popen(command,

488

722

close_fds=True,

489

shell=True, cwd="/")

490

self.checker_callback_tag = (gobject.child_watch_add

491

(self.checker.pid,

492

self.checker_callback,

493

data=command))

494

# The checker may have completed before the gobject

495

# watch was added. Check for this.

723

shell=True, cwd="/",

724

**popen_args)

725

except OSError as error:

726

logger.error("Failed to start subprocess",

727

exc_info=error)

728

return True

729

self.checker_callback_tag = (gobject.child_watch_add

730

(self.checker.pid,

731

self.checker_callback,

732

data=command))

733

# The checker may have completed before the gobject

734

# watch was added. Check for this.

735

try:

496

736

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

497

if pid:

498

gobject.source_remove(self.checker_callback_tag)

499

self.checker_callback(pid, status, command)

500

except OSError, error:

501

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

502

error)

737

except OSError as error:

738

if error.errno == errno.ECHILD:

739

# This should never happen

740

logger.error("Child process vanished",

741

exc_info=error)

742

return True

743

raise

744

if pid:

745

gobject.source_remove(self.checker_callback_tag)

746

self.checker_callback(pid, status, command)

503

747

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

504

748

return True

505

749

512

756

return

513

757

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

514

758

try:

515

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

759

self.checker.terminate()

516

760

#time.sleep(0.5)

517

761

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

518

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

519

except OSError, error:

762

# self.checker.kill()

763

except OSError as error:

520

764

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

521

765

raise

522

766

self.checker = None

523

767

768

524

769

def dbus_service_property(dbus_interface, signature="v",

525

770

access="readwrite", byte_arrays=False):

526

771

"""Decorators for marking methods of a DBusObjectWithProperties to

537

782

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

538

783

if byte_arrays and signature != "ay":

539

784

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

540

" signature %r" % signature)

785

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

541

786

def decorator(func):

542

787

func._dbus_is_property = True

543

788

func._dbus_interface = dbus_interface

551

796

return decorator

552

797

553

798

799

def dbus_interface_annotations(dbus_interface):

800

"""Decorator for marking functions returning interface annotations

801

802

Usage:

803

804

@dbus_interface_annotations("org.example.Interface")

805

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

806

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

807

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

808

"false"}

809

"""

810

def decorator(func):

811

func._dbus_is_interface = True

812

func._dbus_interface = dbus_interface

813

func._dbus_name = dbus_interface

814

return func

815

return decorator

816

817

818

def dbus_annotations(annotations):

819

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

820

Usage:

821

822

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

823

"org.freedesktop.DBus.Property."

824

"EmitsChangedSignal": "false"})

825

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

826

access="r")

827

def Property_dbus_property(self):

828

return dbus.Boolean(False)

829

"""

830

def decorator(func):

831

func._dbus_annotations = annotations

832

return func

833

return decorator

834

835

554

836

class DBusPropertyException(dbus.exceptions.DBusException):

555

837

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

556

838

"""

557

def __unicode__(self):

558

return unicode(str(self))

559

839

pass

560

840

561

841

class DBusPropertyAccessException(DBusPropertyException):

562

842

"""A property's access permissions disallows an operation.

572

852

573

853

class DBusObjectWithProperties(dbus.service.Object):

574

854

"""A D-Bus object with properties.

575

855

576

856

Classes inheriting from this can use the dbus_service_property

577

857

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

578

858

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

579

859

"""

580

860

581

861

@staticmethod

582

def _is_dbus_property(obj):

583

return getattr(obj, "_dbus_is_property", False)

862

def _is_dbus_thing(thing):

863

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

864

865

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

866

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

867

"""

868

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

869

False)

584

870

585

def _get_all_dbus_properties(self):

871

def _get_all_dbus_things(self, thing):

586

872

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

587

873

"""

588

return ((prop._dbus_name, prop)

589

for name, prop in

590

inspect.getmembers(self, self._is_dbus_property))

874

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

875

name),

876

athing.__get__(self))

877

for cls in self.__class__.__mro__

878

for name, athing in

879

inspect.getmembers(cls,

880

self._is_dbus_thing(thing)))

591

881

592

882

def _get_dbus_property(self, interface_name, property_name):

593

883

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

594

884

property with the specified name and interface.

595

885

"""

596

for name in (property_name,

597

property_name + "_dbus_property"):

598

prop = getattr(self, name, None)

599

if (prop is None

600

or not self._is_dbus_property(prop)

601

or prop._dbus_name != property_name

602

or (interface_name and prop._dbus_interface

603

and interface_name != prop._dbus_interface)):

604

continue

605

return prop

886

for cls in self.__class__.__mro__:

887

for name, value in (inspect.getmembers

888

(cls,

889

self._is_dbus_thing("property"))):

890

if (value._dbus_name == property_name

891

and value._dbus_interface == interface_name):

892

return value.__get__(self)

893

606

894

# No such property

607

895

raise DBusPropertyNotFound(self.dbus_object_path + ":"

608

896

+ interface_name + "."

632

920

# The byte_arrays option is not supported yet on

633

921

# signatures other than "ay".

634

922

if prop._dbus_signature != "ay":

635

raise ValueError

636

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

637

for byte in value))

923

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

924

"'ay' signature {!r}"

925

.format(prop._dbus_signature))

926

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

927

for byte in value))

638

928

prop(value)

639

929

640

930

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

642

932

def GetAll(self, interface_name):

643

933

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

644

934

standard.

645

935

646

936

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

647

937

"""

648

all = {}

649

for name, prop in self._get_all_dbus_properties():

938

properties = {}

939

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

650

940

if (interface_name

651

941

and interface_name != prop._dbus_interface):

652

942

# Interface non-empty but did not match

656

946

continue

657

947

value = prop()

658

948

if not hasattr(value, "variant_level"):

659

all[name] = value

949

properties[name] = value

660

950

continue

661

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

662

value.variant_level+1)

663

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

951

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

952

value.variant_level+1)

953

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

954

955

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

956

def PropertiesChanged(self, interface_name, changed_properties,

957

invalidated_properties):

958

"""Standard D-Bus PropertiesChanged() signal, see D-Bus

959

standard.

960

"""

961

pass

664

962

665

963

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

666

964

out_signature="s",

667

965

path_keyword='object_path',

668

966

connection_keyword='connection')

669

967

def Introspect(self, object_path, connection):

670

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

968

"""Overloading of standard D-Bus method.

969

970

Inserts property tags and interface annotation tags.

671

971

"""

672

972

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

673

973

connection)

680

980

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

681

981

return e

682

982

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

983

# Add property tags

683

984

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

684

985

for name, prop

685

in self._get_all_dbus_properties()

986

in self._get_all_dbus_things("property")

686

987

if prop._dbus_interface

687

988

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

688

989

if_tag.appendChild(tag)

990

# Add annotation tags

991

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

992

for tag in if_tag.getElementsByTagName(typ):

993

annots = dict()

994

for name, prop in (self.

995

_get_all_dbus_things(typ)):

996

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

997

and prop._dbus_interface

998

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

999

annots.update(getattr

1000

(prop,

1001

"_dbus_annotations",

1002

{}))

1003

for name, value in annots.items():

1004

ann_tag = document.createElement(

1005

"annotation")

1006

ann_tag.setAttribute("name", name)

1007

ann_tag.setAttribute("value", value)

1008

tag.appendChild(ann_tag)

1009

# Add interface annotation tags

1010

for annotation, value in dict(

1011

itertools.chain.from_iterable(

1012

annotations().items()

1013

for name, annotations in

1014

self._get_all_dbus_things("interface")

1015

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

1016

)).items():

1017

ann_tag = document.createElement("annotation")

1018

ann_tag.setAttribute("name", annotation)

1019

ann_tag.setAttribute("value", value)

1020

if_tag.appendChild(ann_tag)

689

1021

# Add the names to the return values for the

690

1022

# "org.freedesktop.DBus.Properties" methods

691

1023

if (if_tag.getAttribute("name")

704

1036

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

705

1037

document.unlink()

706

1038

except (AttributeError, xml.dom.DOMException,

707

xml.parsers.expat.ExpatError), error:

1039

xml.parsers.expat.ExpatError) as error:

708

1040

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

709

error)

1041

exc_info=error)

710

1042

return xmlstring

711

1043

712

1044

1045

def datetime_to_dbus(dt, variant_level=0):

1046

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

1047

if dt is None:

1048

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

1049

return dbus.String(dt.isoformat(),

1050

variant_level=variant_level)

1051

1052

1053

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1054

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

1055

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

1056

interface names according to the "alt_interface_names" mapping.

1057

Usage:

1058

1059

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

1060

"net.example.AlternateInterface"})

1061

class SampleDBusObject(dbus.service.Object):

1062

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

1063

def SampleDBusMethod():

1064

pass

1065

1066

The above "SampleDBusMethod" on "SampleDBusObject" will be

1067

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

1068

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

1069

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

1070

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

1071

1072

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

1073

(from DBusObjectWithProperties) and interfaces (from the

1074

dbus_interface_annotations decorator).

1075

"""

1076

def wrapper(cls):

1077

for orig_interface_name, alt_interface_name in (

1078

alt_interface_names.items()):

1079

attr = {}

1080

interface_names = set()

1081

# Go though all attributes of the class

1082

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

1083

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

1084

# with the wrong interface name

1085

if (not hasattr(attribute, "_dbus_interface")

1086

or not attribute._dbus_interface

1087

.startswith(orig_interface_name)):

1088

continue

1089

# Create an alternate D-Bus interface name based on

1090

# the current name

1091

alt_interface = (attribute._dbus_interface

1092

.replace(orig_interface_name,

1093

alt_interface_name))

1094

interface_names.add(alt_interface)

1095

# Is this a D-Bus signal?

1096

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

1097

# Extract the original non-method undecorated

1098

# function by black magic

1099

nonmethod_func = (dict(

1100

zip(attribute.func_code.co_freevars,

1101

attribute.__closure__))["func"]

1102

.cell_contents)

1103

# Create a new, but exactly alike, function

1104

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

1105

# with the alternate D-Bus interface name

1106

new_function = (dbus.service.signal

1107

(alt_interface,

1108

attribute._dbus_signature)

1109

(types.FunctionType(

1110

nonmethod_func.func_code,

1111

nonmethod_func.func_globals,

1112

nonmethod_func.func_name,

1113

nonmethod_func.func_defaults,

1114

nonmethod_func.func_closure)))

1115

# Copy annotations, if any

1116

try:

1117

new_function._dbus_annotations = (

1118

dict(attribute._dbus_annotations))

1119

except AttributeError:

1120

pass

1121

# Define a creator of a function to call both the

1122

# original and alternate functions, so both the

1123

# original and alternate signals gets sent when

1124

# the function is called

1125

def fixscope(func1, func2):

1126

"""This function is a scope container to pass

1127

func1 and func2 to the "call_both" function

1128

outside of its arguments"""

1129

def call_both(*args, **kwargs):

1130

"""This function will emit two D-Bus

1131

signals by calling func1 and func2"""

1132

func1(*args, **kwargs)

1133

func2(*args, **kwargs)

1134

return call_both

1135

# Create the "call_both" function and add it to

1136

# the class

1137

attr[attrname] = fixscope(attribute, new_function)

1138

# Is this a D-Bus method?

1139

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

1140

# Create a new, but exactly alike, function

1141

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

1142

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

1143

# to the class.

1144

attr[attrname] = (dbus.service.method

1145

(alt_interface,

1146

attribute._dbus_in_signature,

1147

attribute._dbus_out_signature)

1148

(types.FunctionType

1149

(attribute.func_code,

1150

attribute.func_globals,

1151

attribute.func_name,

1152

attribute.func_defaults,

1153

attribute.func_closure)))

1154

# Copy annotations, if any

1155

try:

1156

attr[attrname]._dbus_annotations = (

1157

dict(attribute._dbus_annotations))

1158

except AttributeError:

1159

pass

1160

# Is this a D-Bus property?

1161

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

1162

# Create a new, but exactly alike, function

1163

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

1164

# property with the alternate D-Bus interface

1165

# name. Add it to the class.

1166

attr[attrname] = (dbus_service_property

1167

(alt_interface,

1168

attribute._dbus_signature,

1169

attribute._dbus_access,

1170

attribute

1171

._dbus_get_args_options

1172

["byte_arrays"])

1173

(types.FunctionType

1174

(attribute.func_code,

1175

attribute.func_globals,

1176

attribute.func_name,

1177

attribute.func_defaults,

1178

attribute.func_closure)))

1179

# Copy annotations, if any

1180

try:

1181

attr[attrname]._dbus_annotations = (

1182

dict(attribute._dbus_annotations))

1183

except AttributeError:

1184

pass

1185

# Is this a D-Bus interface?

1186

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

1187

# Create a new, but exactly alike, function

1188

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

1189

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

1190

# to the class.

1191

attr[attrname] = (dbus_interface_annotations

1192

(alt_interface)

1193

(types.FunctionType

1194

(attribute.func_code,

1195

attribute.func_globals,

1196

attribute.func_name,

1197

attribute.func_defaults,

1198

attribute.func_closure)))

1199

if deprecate:

1200

# Deprecate all alternate interfaces

1201

iname="_AlternateDBusNames_interface_annotation{}"

1202

for interface_name in interface_names:

1203

@dbus_interface_annotations(interface_name)

1204

def func(self):

1205

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

1206

"true" }

1207

# Find an unused name

1208

for aname in (iname.format(i)

1209

for i in itertools.count()):

1210

if aname not in attr:

1211

attr[aname] = func

1212

break

1213

if interface_names:

1214

# Replace the class with a new subclass of it with

1215

# methods, signals, etc. as created above.

1216

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

1217

(cls,), attr)

1218

return cls

1219

return wrapper

1220

1221

1222

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

1223

"se.bsnet.fukt.Mandos"})

713

1224

class ClientDBus(Client, DBusObjectWithProperties):

714

1225

"""A Client class using D-Bus

715

1226

721

1232

runtime_expansions = (Client.runtime_expansions

722

1233

+ ("dbus_object_path",))

723

1234

1235

_interface = "se.recompile.Mandos.Client"

1236

724

1237

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

725

1238

726

1239

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

727

self._approvals_pending = 0

728

1240

self.bus = bus

729

1241

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

730

1242

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

731

1243

# the D-Bus

732

client_object_name = unicode(self.name).translate(

1244

client_object_name = str(self.name).translate(

733

1245

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

734

1246

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

735

1247

self.dbus_object_path = (dbus.ObjectPath

736

1248

("/clients/" + client_object_name))

737

1249

DBusObjectWithProperties.__init__(self, self.bus,

738

1250

self.dbus_object_path)

739

740

def _get_approvals_pending(self):

741

return self._approvals_pending

742

def _set_approvals_pending(self, value):

743

old_value = self._approvals_pending

744

self._approvals_pending = value

745

bval = bool(value)

746

if (hasattr(self, "dbus_object_path")

747

and bval is not bool(old_value)):

748

dbus_bool = dbus.Boolean(bval, variant_level=1)

749

self.PropertyChanged(dbus.String("ApprovalPending"),

750

dbus_bool)

751

752

approvals_pending = property(_get_approvals_pending,

753

_set_approvals_pending)

754

del _get_approvals_pending, _set_approvals_pending

755

756

@staticmethod

757

def _datetime_to_dbus(dt, variant_level=0):

758

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

759

return dbus.String(dt.isoformat(),

760

variant_level=variant_level)

761

762

def enable(self):

763

oldstate = getattr(self, "enabled", False)

764

r = Client.enable(self)

765

if oldstate != self.enabled:

766

# Emit D-Bus signals

767

self.PropertyChanged(dbus.String("Enabled"),

768

dbus.Boolean(True, variant_level=1))

769

self.PropertyChanged(

770

dbus.String("LastEnabled"),

771

self._datetime_to_dbus(self.last_enabled,

772

variant_level=1))

773

return r

774

775

def disable(self, quiet = False):

776

oldstate = getattr(self, "enabled", False)

777

r = Client.disable(self, quiet=quiet)

778

if not quiet and oldstate != self.enabled:

779

# Emit D-Bus signal

780

self.PropertyChanged(dbus.String("Enabled"),

781

dbus.Boolean(False, variant_level=1))

782

return r

1251

1252

def notifychangeproperty(transform_func,

1253

dbus_name, type_func=lambda x: x,

1254

variant_level=1, invalidate_only=False,

1255

_interface=_interface):

1256

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

1257

its changes to DBus.

1258

1259

transform_fun: Function that takes a value and a variant_level

1260

and transforms it to a D-Bus type.

1261

dbus_name: D-Bus name of the variable

1262

type_func: Function that transform the value before sending it

1263

to the D-Bus. Default: no transform

1264

variant_level: D-Bus variant level. Default: 1

1265

"""

1266

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

1267

def setter(self, value):

1268

if hasattr(self, "dbus_object_path"):

1269

if (not hasattr(self, attrname) or

1270

type_func(getattr(self, attrname, None))

1271

!= type_func(value)):

1272

if invalidate_only:

1273

self.PropertiesChanged(_interface,

1274

dbus.Dictionary(),

1275

dbus.Array

1276

((dbus_name,)))

1277

else:

1278

dbus_value = transform_func(type_func(value),

1279

variant_level

1280

=variant_level)

1281

self.PropertyChanged(dbus.String(dbus_name),

1282

dbus_value)

1283

self.PropertiesChanged(_interface,

1284

dbus.Dictionary({

1285

dbus.String(dbus_name):

1286

dbus_value }), dbus.Array())

1287

setattr(self, attrname, value)

1288

1289

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

1290

1291

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1292

approvals_pending = notifychangeproperty(dbus.Boolean,

1293

"ApprovalPending",

1294

type_func = bool)

1295

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

1296

last_enabled = notifychangeproperty(datetime_to_dbus,

1297

"LastEnabled")

1298

checker = notifychangeproperty(dbus.Boolean, "CheckerRunning",

1299

type_func = lambda checker:

1300

checker is not None)

1301

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1302

"LastCheckedOK")

1303

last_checker_status = notifychangeproperty(dbus.Int16,

1304

"LastCheckerStatus")

1305

last_approval_request = notifychangeproperty(

1306

datetime_to_dbus, "LastApprovalRequest")

1307

approved_by_default = notifychangeproperty(dbus.Boolean,

1308

"ApprovedByDefault")

1309

approval_delay = notifychangeproperty(dbus.UInt64,

1310

"ApprovalDelay",

1311

type_func =

1312

lambda td: td.total_seconds()

1313

* 1000)

1314

approval_duration = notifychangeproperty(

1315

dbus.UInt64, "ApprovalDuration",

1316

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

1317

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

1318

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

1319

type_func = lambda td:

1320

td.total_seconds() * 1000)

1321

extended_timeout = notifychangeproperty(

1322

dbus.UInt64, "ExtendedTimeout",

1323

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

1324

interval = notifychangeproperty(dbus.UInt64,

1325

"Interval",

1326

type_func =

1327

lambda td: td.total_seconds()

1328

* 1000)

1329

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

1330

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

1331

invalidate_only=True)

1332

1333

del notifychangeproperty

783

1334

784

1335

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

785

1336

try:

794

1345

*args, **kwargs):

795

1346

self.checker_callback_tag = None

796

1347

self.checker = None

797

# Emit D-Bus signal

798

self.PropertyChanged(dbus.String("CheckerRunning"),

799

dbus.Boolean(False, variant_level=1))

800

1348

if os.WIFEXITED(condition):

801

1349

exitstatus = os.WEXITSTATUS(condition)

802

1350

# Emit D-Bus signal

812

1360

return Client.checker_callback(self, pid, condition, command,

813

1361

*args, **kwargs)

814

1362

815

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

816

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

817

# Emit D-Bus signal

818

self.PropertyChanged(

819

dbus.String("LastCheckedOK"),

820

(self._datetime_to_dbus(self.last_checked_ok,

821

variant_level=1)))

822

return r

823

824

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

825

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

826

# Emit D-Bus signal

827

self.PropertyChanged(

828

dbus.String("LastApprovalRequest"),

829

(self._datetime_to_dbus(self.last_approval_request,

830

variant_level=1)))

831

return r

832

833

1363

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

834

old_checker = self.checker

835

if self.checker is not None:

836

old_checker_pid = self.checker.pid

837

else:

838

old_checker_pid = None

1364

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

839

1365

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

840

1366

# Only if new checker process was started

841

1367

if (self.checker is not None

842

1368

and old_checker_pid != self.checker.pid):

843

1369

# Emit D-Bus signal

844

1370

self.CheckerStarted(self.current_checker_command)

845

self.PropertyChanged(

846

dbus.String("CheckerRunning"),

847

dbus.Boolean(True, variant_level=1))

848

1371

return r

849

1372

850

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

851

old_checker = getattr(self, "checker", None)

852

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

853

if (old_checker is not None

854

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

855

self.PropertyChanged(dbus.String("CheckerRunning"),

856

dbus.Boolean(False, variant_level=1))

857

return r

858

859

1373

def _reset_approved(self):

860

self._approved = None

1374

self.approved = None

861

1375

return False

862

1376

863

1377

def approve(self, value=True):

1378

self.approved = value

1379

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

1380

* 1000), self._reset_approved)

864

1381

self.send_changedstate()

865

self._approved = value

866

gobject.timeout_add(self._timedelta_to_milliseconds

867

(self.approval_duration),

868

self._reset_approved)

869

870

1382

871

1383

## D-Bus methods, signals & properties

872

_interface = "se.bsnet.fukt.Mandos.Client"

1384

1385

## Interfaces

873

1386

874

1387

## Signals

875

1388

886

1399

pass

887

1400

888

1401

# PropertyChanged - signal

1402

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

889

1403

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

890

1404

def PropertyChanged(self, property, value):

891

1405

"D-Bus signal"

922

1436

# CheckedOK - method

923

1437

@dbus.service.method(_interface)

924

1438

def CheckedOK(self):

925

return self.checked_ok()

1439

self.checked_ok()

926

1440

927

1441

# Enable - method

928

1442

@dbus.service.method(_interface)

961

1475

if value is None: # get

962

1476

return dbus.Boolean(self.approved_by_default)

963

1477

self.approved_by_default = bool(value)

964

# Emit D-Bus signal

965

self.PropertyChanged(dbus.String("ApprovedByDefault"),

966

dbus.Boolean(value, variant_level=1))

967

1478

968

1479

# ApprovalDelay - property

969

1480

@dbus_service_property(_interface, signature="t",

970

1481

access="readwrite")

971

1482

def ApprovalDelay_dbus_property(self, value=None):

972

1483

if value is None: # get

973

return dbus.UInt64(self.approval_delay_milliseconds())

1484

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

1485

* 1000)

974

1486

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

975

# Emit D-Bus signal

976

self.PropertyChanged(dbus.String("ApprovalDelay"),

977

dbus.UInt64(value, variant_level=1))

978

1487

979

1488

# ApprovalDuration - property

980

1489

@dbus_service_property(_interface, signature="t",

981

1490

access="readwrite")

982

1491

def ApprovalDuration_dbus_property(self, value=None):

983

1492

if value is None: # get

984

return dbus.UInt64(self._timedelta_to_milliseconds(

985

self.approval_duration))

1493

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

1494

* 1000)

986

1495

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

987

# Emit D-Bus signal

988

self.PropertyChanged(dbus.String("ApprovalDuration"),

989

dbus.UInt64(value, variant_level=1))

990

1496

991

1497

# Name - property

992

1498

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

1004

1510

def Host_dbus_property(self, value=None):

1005

1511

if value is None: # get

1006

1512

return dbus.String(self.host)

1007

self.host = value

1008

# Emit D-Bus signal

1009

self.PropertyChanged(dbus.String("Host"),

1010

dbus.String(value, variant_level=1))

1513

self.host = str(value)

1011

1514

1012

1515

# Created - property

1013

1516

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

1014

1517

def Created_dbus_property(self):

1015

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

1518

return datetime_to_dbus(self.created)

1016

1519

1017

1520

# LastEnabled - property

1018

1521

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

1019

1522

def LastEnabled_dbus_property(self):

1020

if self.last_enabled is None:

1021

return dbus.String("")

1022

return dbus.String(self._datetime_to_dbus(self.last_enabled))

1523

return datetime_to_dbus(self.last_enabled)

1023

1524

1024

1525

# Enabled - property

1025

1526

@dbus_service_property(_interface, signature="b",

1039

1540

if value is not None:

1040

1541

self.checked_ok()

1041

1542

return

1042

if self.last_checked_ok is None:

1043

return dbus.String("")

1044

return dbus.String(self._datetime_to_dbus(self

1045

.last_checked_ok))

1543

return datetime_to_dbus(self.last_checked_ok)

1544

1545

# LastCheckerStatus - property

1546

@dbus_service_property(_interface, signature="n",

1547

access="read")

1548

def LastCheckerStatus_dbus_property(self):

1549

return dbus.Int16(self.last_checker_status)

1550

1551

# Expires - property

1552

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

1553

def Expires_dbus_property(self):

1554

return datetime_to_dbus(self.expires)

1046

1555

1047

1556

# LastApprovalRequest - property

1048

1557

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

1049

1558

def LastApprovalRequest_dbus_property(self):

1050

if self.last_approval_request is None:

1051

return dbus.String("")

1052

return dbus.String(self.

1053

_datetime_to_dbus(self

1054

.last_approval_request))

1559

return datetime_to_dbus(self.last_approval_request)

1055

1560

1056

1561

# Timeout - property

1057

1562

@dbus_service_property(_interface, signature="t",

1058

1563

access="readwrite")

1059

1564

def Timeout_dbus_property(self, value=None):

1060

1565

if value is None: # get

1061

return dbus.UInt64(self.timeout_milliseconds())

1566

return dbus.UInt64(self.timeout.total_seconds() * 1000)

1567

old_timeout = self.timeout

1062

1568

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

1063

# Emit D-Bus signal

1064

self.PropertyChanged(dbus.String("Timeout"),

1065

dbus.UInt64(value, variant_level=1))

1066

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

1067

return

1068

# Reschedule timeout

1069

gobject.source_remove(self.disable_initiator_tag)

1070

self.disable_initiator_tag = None

1071

time_to_die = (self.

1072

_timedelta_to_milliseconds((self

1073

.last_checked_ok

1074

+ self.timeout)

1075

- datetime.datetime

1076

.utcnow()))

1077

if time_to_die <= 0:

1078

# The timeout has passed

1079

self.disable()

1080

else:

1081

self.disable_initiator_tag = (gobject.timeout_add

1082

(time_to_die, self.disable))

1569

# Reschedule disabling

1570

if self.enabled:

1571

now = datetime.datetime.utcnow()

1572

self.expires += self.timeout - old_timeout

1573

if self.expires <= now:

1574

# The timeout has passed

1575

self.disable()

1576

else:

1577

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

1578

is None):

1579

return

1580

gobject.source_remove(self.disable_initiator_tag)

1581

self.disable_initiator_tag = (

1582

gobject.timeout_add(

1583

int((self.expires - now).total_seconds()

1584

* 1000), self.disable))

1585

1586

# ExtendedTimeout - property

1587

@dbus_service_property(_interface, signature="t",

1588

access="readwrite")

1589

def ExtendedTimeout_dbus_property(self, value=None):

1590

if value is None: # get

1591

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

1592

* 1000)

1593

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

1083

1594

1084

1595

# Interval - property

1085

1596

@dbus_service_property(_interface, signature="t",

1086

1597

access="readwrite")

1087

1598

def Interval_dbus_property(self, value=None):

1088

1599

if value is None: # get

1089

return dbus.UInt64(self.interval_milliseconds())

1600

return dbus.UInt64(self.interval.total_seconds() * 1000)

1090

1601

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

1091

# Emit D-Bus signal

1092

self.PropertyChanged(dbus.String("Interval"),

1093

dbus.UInt64(value, variant_level=1))

1094

1602

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

1095

1603

return

1096

# Reschedule checker run

1097

gobject.source_remove(self.checker_initiator_tag)

1098

self.checker_initiator_tag = (gobject.timeout_add

1099

(value, self.start_checker))

1100

self.start_checker() # Start one now, too

1101

1604

if self.enabled:

1605

# Reschedule checker run

1606

gobject.source_remove(self.checker_initiator_tag)

1607

self.checker_initiator_tag = (gobject.timeout_add

1608

(value, self.start_checker))

1609

self.start_checker() # Start one now, too

1610

1102

1611

# Checker - property

1103

1612

@dbus_service_property(_interface, signature="s",

1104

1613

access="readwrite")

1105

1614

def Checker_dbus_property(self, value=None):

1106

1615

if value is None: # get

1107

1616

return dbus.String(self.checker_command)

1108

self.checker_command = value

1109

# Emit D-Bus signal

1110

self.PropertyChanged(dbus.String("Checker"),

1111

dbus.String(self.checker_command,

1112

variant_level=1))

1617

self.checker_command = str(value)

1113

1618

1114

1619

# CheckerRunning - property

1115

1620

@dbus_service_property(_interface, signature="b",

1131

1636

@dbus_service_property(_interface, signature="ay",

1132

1637

access="write", byte_arrays=True)

1133

1638

def Secret_dbus_property(self, value):

1134

self.secret = str(value)

1639

self.secret = bytes(value)

1135

1640

1136

1641

del _interface

1137

1642

1142

1647

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

1143

1648

if not self._pipe.recv():

1144

1649

raise KeyError()

1145

1650

1146

1651

def __getattribute__(self, name):

1147

if(name == '_pipe'):

1652

if name == '_pipe':

1148

1653

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

1149

1654

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

1150

1655

data = self._pipe.recv()

1155

1660

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

1156

1661

return self._pipe.recv()[1]

1157

1662

return func

1158

1663

1159

1664

def __setattr__(self, name, value):

1160

if(name == '_pipe'):

1665

if name == '_pipe':

1161

1666

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

1162

1667

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

1163

1668

1171

1676

def handle(self):

1172

1677

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

1173

1678

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

1174

unicode(self.client_address))

1679

str(self.client_address))

1175

1680

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

1176

1681

self.server.child_pipe.fileno())

1177

1682

1178

1683

session = (gnutls.connection

1179

1684

.ClientSession(self.request,

1180

1685

gnutls.connection

1181

1686

.X509Credentials()))

1182

1687

1183

1688

# Note: gnutls.connection.X509Credentials is really a

1184

1689

# generic GnuTLS certificate credentials object so long as

1185

1690

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

1186

1691

# here despite using OpenPGP certificates.

1187

1692

1188

1693

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

1189

1694

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

1190

1695

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

1196

1701

(gnutls.library.functions

1197

1702

.gnutls_priority_set_direct(session._c_object,

1198

1703

priority, None))

1199

1704

1200

1705

# Start communication using the Mandos protocol

1201

1706

# Get protocol number

1202

1707

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

1203

1708

logger.debug("Protocol version: %r", line)

1204

1709

try:

1205

1710

if int(line.strip().split()[0]) > 1:

1206

raise RuntimeError

1207

except (ValueError, IndexError, RuntimeError), error:

1711

raise RuntimeError(line)

1712

except (ValueError, IndexError, RuntimeError) as error:

1208

1713

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

1209

1714

return

1210

1715

1211

1716

# Start GnuTLS connection

1212

1717

try:

1213

1718

session.handshake()

1214

except gnutls.errors.GNUTLSError, error:

1719

except gnutls.errors.GNUTLSError as error:

1215

1720

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

1216

1721

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

1217

1722

# established. Just abandon the request.

1218

1723

return

1219

1724

logger.debug("Handshake succeeded")

1220

1725

1221

1726

approval_required = False

1222

1727

try:

1223

1728

try:

1224

1729

fpr = self.fingerprint(self.peer_certificate

1225

1730

(session))

1226

except (TypeError, gnutls.errors.GNUTLSError), error:

1731

except (TypeError,

1732

gnutls.errors.GNUTLSError) as error:

1227

1733

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

1228

1734

return

1229

1735

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

1230

1736

1231

1737

try:

1232

1738

client = ProxyClient(child_pipe, fpr,

1233

1739

self.client_address)

1241

1747

1242

1748

while True:

1243

1749

if not client.enabled:

1244

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

1750

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

1245

1751

client.name)

1246

1752

if self.server.use_dbus:

1247

1753

# Emit D-Bus signal

1248

client.Rejected("Disabled")

1754

client.Rejected("Disabled")

1249

1755

return

1250

1756

1251

if client._approved or not client.approval_delay:

1757

if client.approved or not client.approval_delay:

1252

1758

#We are approved or approval is disabled

1253

1759

break

1254

elif client._approved is None:

1760

elif client.approved is None:

1255

1761

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

1256

1762

client.name)

1257

1763

if self.server.use_dbus:

1258

1764

# Emit D-Bus signal

1259

1765

client.NeedApproval(

1260

client.approval_delay_milliseconds(),

1261

client.approved_by_default)

1766

client.approval_delay.total_seconds()

1767

* 1000, client.approved_by_default)

1262

1768

else:

1263

1769

logger.warning("Client %s was not approved",

1264

1770

client.name)

1268

1774

return

1269

1775

1270

1776

#wait until timeout or approved

1271

#x = float(client._timedelta_to_milliseconds(delay))

1272

1777

time = datetime.datetime.now()

1273

1778

client.changedstate.acquire()

1274

client.changedstate.wait(float(client._timedelta_to_milliseconds(delay) / 1000))

1779

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

1275

1780

client.changedstate.release()

1276

1781

time2 = datetime.datetime.now()

1277

1782

if (time2 - time) >= delay:

1292

1797

while sent_size < len(client.secret):

1293

1798

try:

1294

1799

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

1295

except (gnutls.errors.GNUTLSError), error:

1296

logger.warning("gnutls send failed")

1800

except gnutls.errors.GNUTLSError as error:

1801

logger.warning("gnutls send failed",

1802

exc_info=error)

1297

1803

return

1298

1804

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

1299

1805

sent, len(client.secret)

1300

1806

- (sent_size + sent))

1301

1807

sent_size += sent

1302

1808

1303

1809

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

1304

# bump the timeout as if seen

1305

client.checked_ok()

1810

# bump the timeout using extended_timeout

1811

client.bump_timeout(client.extended_timeout)

1306

1812

if self.server.use_dbus:

1307

1813

# Emit D-Bus signal

1308

1814

client.GotSecret()

1312

1818

client.approvals_pending -= 1

1313

1819

try:

1314

1820

session.bye()

1315

except (gnutls.errors.GNUTLSError), error:

1316

logger.warning("GnuTLS bye failed")

1821

except gnutls.errors.GNUTLSError as error:

1822

logger.warning("GnuTLS bye failed",

1823

exc_info=error)

1317

1824

1318

1825

@staticmethod

1319

1826

def peer_certificate(session):

1375

1882

# Convert the buffer to a Python bytestring

1376

1883

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

1377

1884

# Convert the bytestring to hexadecimal notation

1378

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

1885

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

1379

1886

return hex_fpr

1380

1887

1381

1888

1384

1891

def sub_process_main(self, request, address):

1385

1892

try:

1386

1893

self.finish_request(request, address)

1387

except:

1894

except Exception:

1388

1895

self.handle_error(request, address)

1389

1896

self.close_request(request)

1390

1897

1391

1898

def process_request(self, request, address):

1392

1899

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

1393

multiprocessing.Process(target = self.sub_process_main,

1394

args = (request, address)).start()

1900

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

1901

args = (request, address))

1902

proc.start()

1903

return proc

1904

1395

1905

1396

1906

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1397

1907

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

1401

1911

This function creates a new pipe in self.pipe

1402

1912

"""

1403

1913

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1404

1405

super(MultiprocessingMixInWithPipe,

1406

self).process_request(request, client_address)

1914

1915

proc = MultiprocessingMixIn.process_request(self, request,

1916

client_address)

1407

1917

self.child_pipe.close()

1408

self.add_pipe(parent_pipe)

1409

1410

def add_pipe(self, parent_pipe):

1918

self.add_pipe(parent_pipe, proc)

1919

1920

def add_pipe(self, parent_pipe, proc):

1411

1921

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

1412

raise NotImplementedError

1922

raise NotImplementedError()

1923

1413

1924

1414

1925

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1415

1926

socketserver.TCPServer, object):

1421

1932

use_ipv6: Boolean; to use IPv6 or not

1422

1933

"""

1423

1934

def __init__(self, server_address, RequestHandlerClass,

1424

interface=None, use_ipv6=True):

1935

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

1936

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

1937

creating a new one with socket.socket().

1938

"""

1425

1939

self.interface = interface

1426

1940

if use_ipv6:

1427

1941

self.address_family = socket.AF_INET6

1942

if socketfd is not None:

1943

# Save the file descriptor

1944

self.socketfd = socketfd

1945

# Save the original socket.socket() function

1946

self.socket_socket = socket.socket

1947

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

1948

#

1949

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

1950

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

1951

# patching socket.socket.)

1952

#

1953

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

1954

@functools.wraps(socket.socket)

1955

def socket_wrapper(*args, **kwargs):

1956

# Restore original function so subsequent calls are

1957

# not affected.

1958

socket.socket = self.socket_socket

1959

del self.socket_socket

1960

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

1961

# saved file descriptor.

1962

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

1963

# Replace socket.socket() function with wrapper

1964

socket.socket = socket_wrapper

1965

# The socketserver.TCPServer.__init__ will call

1966

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

1967

# socket_wrapper(), if socketfd was set.

1428

1968

socketserver.TCPServer.__init__(self, server_address,

1429

1969

RequestHandlerClass)

1970

1430

1971

def server_bind(self):

1431

1972

"""This overrides the normal server_bind() function

1432

1973

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

1440

1981

try:

1441

1982

self.socket.setsockopt(socket.SOL_SOCKET,

1442

1983

SO_BINDTODEVICE,

1443

str(self.interface

1444

+ '\0'))

1445

except socket.error, error:

1446

if error[0] == errno.EPERM:

1447

logger.error("No permission to"

1448

" bind to interface %s",

1449

self.interface)

1450

elif error[0] == errno.ENOPROTOOPT:

1984

(self.interface + "\0")

1985

.encode("utf-8"))

1986

except socket.error as error:

1987

if error.errno == errno.EPERM:

1988

logger.error("No permission to bind to"

1989

" interface %s", self.interface)

1990

elif error.errno == errno.ENOPROTOOPT:

1451

1991

logger.error("SO_BINDTODEVICE not available;"

1452

1992

" cannot bind to interface %s",

1453

1993

self.interface)

1994

elif error.errno == errno.ENODEV:

1995

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

1996

" cannot bind", self.interface)

1454

1997

else:

1455

1998

raise

1456

1999

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

1459

2002

if self.address_family == socket.AF_INET6:

1460

2003

any_address = "::" # in6addr_any

1461

2004

else:

1462

any_address = socket.INADDR_ANY

2005

any_address = "0.0.0.0" # INADDR_ANY

1463

2006

self.server_address = (any_address,

1464

2007

self.server_address[1])

1465

2008

elif not self.server_address[1]:

1486

2029

"""

1487

2030

def __init__(self, server_address, RequestHandlerClass,

1488

2031

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

1489

gnutls_priority=None, use_dbus=True):

2032

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

1490

2033

self.enabled = False

1491

2034

self.clients = clients

1492

2035

if self.clients is None:

1493

self.clients = set()

2036

self.clients = {}

1494

2037

self.use_dbus = use_dbus

1495

2038

self.gnutls_priority = gnutls_priority

1496

2039

IPv6_TCPServer.__init__(self, server_address,

1497

2040

RequestHandlerClass,

1498

2041

interface = interface,

1499

use_ipv6 = use_ipv6)

2042

use_ipv6 = use_ipv6,

2043

socketfd = socketfd)

1500

2044

def server_activate(self):

1501

2045

if self.enabled:

1502

2046

return socketserver.TCPServer.server_activate(self)

2047

1503

2048

def enable(self):

1504

2049

self.enabled = True

1505

def add_pipe(self, parent_pipe):

2050

2051

def add_pipe(self, parent_pipe, proc):

1506

2052

# Call "handle_ipc" for both data and EOF events

1507

2053

gobject.io_add_watch(parent_pipe.fileno(),

1508

2054

gobject.IO_IN | gobject.IO_HUP,

1509

2055

functools.partial(self.handle_ipc,

1510

parent_pipe = parent_pipe))

1511

2056

parent_pipe =

2057

parent_pipe,

2058

proc = proc))

2059

1512

2060

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

1513

client_object=None):

1514

condition_names = {

1515

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

1516

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

1517

# blocking).

1518

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

1519

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

1520

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

1521

# broken, usually for pipes and

1522

# sockets).

1523

}

1524

conditions_string = ' | '.join(name

1525

for cond, name in

1526

condition_names.iteritems()

1527

if cond & condition)

1528

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

1529

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

2061

proc = None, client_object=None):

2062

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

2063

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

2064

# Wait for other process to exit

2065

proc.join()

1530

2066

return False

1531

2067

1532

2068

# Read a request from the child

1537

2073

fpr = request[1]

1538

2074

address = request[2]

1539

2075

1540

for c in self.clients:

2076

for c in self.clients.itervalues():

1541

2077

if c.fingerprint == fpr:

1542

2078

client = c

1543

2079

break

1544

2080

else:

1545

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

1546

"dress: %s", fpr, address)

2081

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

2082

"dress: %s", fpr, address)

1547

2083

if self.use_dbus:

1548

2084

# Emit D-Bus signal

1549

mandos_dbus_service.ClientNotFound(fpr, address[0])

2085

mandos_dbus_service.ClientNotFound(fpr,

2086

address[0])

1550

2087

parent_pipe.send(False)

1551

2088

return False

1552

2089

1553

2090

gobject.io_add_watch(parent_pipe.fileno(),

1554

2091

gobject.IO_IN | gobject.IO_HUP,

1555

2092

functools.partial(self.handle_ipc,

1556

parent_pipe = parent_pipe,

1557

client_object = client))

2093

parent_pipe =

2094

parent_pipe,

2095

proc = proc,

2096

client_object =

2097

client))

1558

2098

parent_pipe.send(True)

1559

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

2099

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

2100

# same fileno

1560

2101

return False

1561

2102

if command == 'funcall':

1562

2103

funcname = request[1]

1563

2104

args = request[2]

1564

2105

kwargs = request[3]

1565

2106

1566

parent_pipe.send(('data', getattr(client_object, funcname)(*args, **kwargs)))

1567

2107

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

2108

funcname)(*args,

2109

**kwargs)))

2110

1568

2111

if command == 'getattr':

1569

2112

attrname = request[1]

1570

2113

if callable(client_object.__getattribute__(attrname)):

1571

2114

parent_pipe.send(('function',))

1572

2115

else:

1573

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

2116

parent_pipe.send(('data', client_object

2117

.__getattribute__(attrname)))

1574

2118

1575

2119

if command == 'setattr':

1576

2120

attrname = request[1]

1577

2121

value = request[2]

1578

2122

setattr(client_object, attrname, value)

1579

2123

1580

2124

return True

1581

2125

1582

2126

2127

def rfc3339_duration_to_delta(duration):

2128

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

2129

2130

>>> rfc3339_duration_to_delta("P7D")

2131

datetime.timedelta(7)

2132

>>> rfc3339_duration_to_delta("PT60S")

2133

datetime.timedelta(0, 60)

2134

>>> rfc3339_duration_to_delta("PT60M")

2135

datetime.timedelta(0, 3600)

2136

>>> rfc3339_duration_to_delta("PT24H")

2137

datetime.timedelta(1)

2138

>>> rfc3339_duration_to_delta("P1W")

2139

datetime.timedelta(7)

2140

>>> rfc3339_duration_to_delta("PT5M30S")

2141

datetime.timedelta(0, 330)

2142

>>> rfc3339_duration_to_delta("P1DT3M20S")

2143

datetime.timedelta(1, 200)

2144

"""

2145

2146

# Parsing an RFC 3339 duration with regular expressions is not

2147

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

2148

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

2149

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

2150

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

2151

# avoid excessive use of external libraries.

2152

2153

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

2154

Token = collections.namedtuple("Token",

2155

("regexp", # To match token; if

2156

# "value" is not None,

2157

# must have a "group"

2158

# containing digits

2159

"value", # datetime.timedelta or

2160

# None

2161

"followers")) # Tokens valid after

2162

# this token

2163

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

2164

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

2165

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

2166

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

2167

datetime.timedelta(seconds=1),

2168

frozenset((token_end,)))

2169

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

2170

datetime.timedelta(minutes=1),

2171

frozenset((token_second, token_end)))

2172

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

2173

datetime.timedelta(hours=1),

2174

frozenset((token_minute, token_end)))

2175

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

2176

None,

2177

frozenset((token_hour, token_minute,

2178

token_second)))

2179

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

2180

datetime.timedelta(days=1),

2181

frozenset((token_time, token_end)))

2182

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

2183

datetime.timedelta(weeks=4),

2184

frozenset((token_day, token_end)))

2185

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

2186

datetime.timedelta(weeks=52),

2187

frozenset((token_month, token_end)))

2188

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

2189

datetime.timedelta(weeks=1),

2190

frozenset((token_end,)))

2191

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

2192

frozenset((token_year, token_month,

2193

token_day, token_time,

2194

token_week)))

2195

# Define starting values

2196

value = datetime.timedelta() # Value so far

2197

found_token = None

2198

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

2199

s = duration # String left to parse

2200

# Loop until end token is found

2201

while found_token is not token_end:

2202

# Search for any currently valid tokens

2203

for token in followers:

2204

match = token.regexp.match(s)

2205

if match is not None:

2206

# Token found

2207

if token.value is not None:

2208

# Value found, parse digits

2209

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

2210

# Add to value so far

2211

value += factor * token.value

2212

# Strip token from string

2213

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

2214

# Go to found token

2215

found_token = token

2216

# Set valid next tokens

2217

followers = found_token.followers

2218

break

2219

else:

2220

# No currently valid tokens were found

2221

raise ValueError("Invalid RFC 3339 duration")

2222

# End token found

2223

return value

2224

2225

1583

2226

def string_to_delta(interval):

1584

2227

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

1585

2228

1596

2239

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

1597

2240

datetime.timedelta(0, 330)

1598

2241

"""

2242

2243

try:

2244

return rfc3339_duration_to_delta(interval)

2245

except ValueError:

2246

pass

2247

1599

2248

timevalue = datetime.timedelta(0)

1600

2249

for s in interval.split():

1601

2250

try:

1602

suffix = unicode(s[-1])

2251

suffix = s[-1]

1603

2252

value = int(s[:-1])

1604

2253

if suffix == "d":

1605

2254

delta = datetime.timedelta(value)

1612

2261

elif suffix == "w":

1613

2262

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

1614

2263

else:

1615

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

1616

except (ValueError, IndexError), e:

2264

raise ValueError("Unknown suffix {!r}"

2265

.format(suffix))

2266

except IndexError as e:

1617

2267

raise ValueError(*(e.args))

1618

2268

timevalue += delta

1619

2269

return timevalue

1620

2270

1621

2271

1622

def if_nametoindex(interface):

1623

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

1624

1625

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

1626

global if_nametoindex

1627

try:

1628

if_nametoindex = (ctypes.cdll.LoadLibrary

1629

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

1630

.if_nametoindex)

1631

except (OSError, AttributeError):

1632

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

1633

def if_nametoindex(interface):

1634

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

1635

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

1636

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

1637

ifreq = fcntl.ioctl(s, SIOCGIFINDEX,

1638

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

1639

interface))

1640

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

1641

ifreq[16:20])[0]

1642

return interface_index

1643

return if_nametoindex(interface)

1644

1645

1646

2272

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

1647

2273

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

1648

2274

1656

2282

sys.exit()

1657

2283

if not noclose:

1658

2284

# Close all standard open file descriptors

1659

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

2285

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

1660

2286

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

1661

raise OSError(errno.ENODEV,

1662

"%s not a character device"

1663

% os.path.devnull)

2287

raise OSError(errno.ENODEV, "{} not a character device"

2288

.format(os.devnull))

1664

2289

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

1665

2290

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

1666

2291

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

1675

2300

1676

2301

parser = argparse.ArgumentParser()

1677

2302

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

1678

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

2303

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

1679

2304

help="show version number and exit")

1680

2305

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

1681

2306

help="Bind to interface IF")

1687

2312

help="Run self-test")

1688

2313

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

1689

2314

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

1690

" to terminal")

2315

" to terminal", default=None)

1691

2316

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

1692

2317

help="Debug level for stdout output")

1693

2318

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

1700

2325

" files")

1701

2326

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

1702

2327

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

1703

" system bus interface")

2328

" system bus interface", default=None)

1704

2329

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

1705

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

2330

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

2331

default=None)

2332

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

2333

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

2334

" state", default=None)

2335

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

2336

help="Specify a file descriptor to a network"

2337

" socket to use instead of creating one")

2338

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

2339

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

2340

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

2341

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

2342

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

2343

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

2344

default=None)

2345

1706

2346

options = parser.parse_args()

1707

2347

1708

2348

if options.check:

1709

2349

import doctest

1710

doctest.testmod()

1711

sys.exit()

2350

fail_count, test_count = doctest.testmod()

2351

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

1712

2352

1713

2353

# Default values for config file for server-global settings

1714

2354

server_defaults = { "interface": "",

1716

2356

"port": "",

1717

2357

"debug": "False",

1718

2358

"priority":

1719

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

2359

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

1720

2360

"servicename": "Mandos",

1721

2361

"use_dbus": "True",

1722

2362

"use_ipv6": "True",

1723

2363

"debuglevel": "",

2364

"restore": "True",

2365

"socket": "",

2366

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

2367

"foreground": "False",

2368

"zeroconf": "True",

1724

2369

}

1725

2370

1726

2371

# Parse config file for server-global settings

1731

2376

# Convert the SafeConfigParser object to a dict

1732

2377

server_settings = server_config.defaults()

1733

2378

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

1734

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

2379

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

1735

2380

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

1736

2381

option)

1737

2382

if server_settings["port"]:

1738

2383

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

1739

2384

"port")

2385

if server_settings["socket"]:

2386

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

2387

"socket")

2388

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

2389

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

2390

# happen with a supplied network socket.

2391

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

2392

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

2393

["socket"])

1740

2394

del server_config

1741

2395

1742

2396

# Override the settings from the config file with command line

1743

2397

# options, if set.

1744

2398

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

1745

2399

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

1746

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

2400

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

2401

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

1747

2402

value = getattr(options, option)

1748

2403

if value is not None:

1749

2404

server_settings[option] = value

1750

2405

del options

1751

2406

# Force all strings to be unicode

1752

2407

for option in server_settings.keys():

1753

if type(server_settings[option]) is str:

1754

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

2408

if isinstance(server_settings[option], bytes):

2409

server_settings[option] = (server_settings[option]

2410

.decode("utf-8"))

2411

# Force all boolean options to be boolean

2412

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

2413

"foreground", "zeroconf"):

2414

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

2415

# Debug implies foreground

2416

if server_settings["debug"]:

2417

server_settings["foreground"] = True

1755

2418

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

1756

2419

1757

2420

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

1758

2421

2422

if (not server_settings["zeroconf"] and

2423

not (server_settings["port"]

2424

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

2425

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

2426

" Zeroconf")

2427

1759

2428

# For convenience

1760

2429

debug = server_settings["debug"]

1761

2430

debuglevel = server_settings["debuglevel"]

1762

2431

use_dbus = server_settings["use_dbus"]

1763

2432

use_ipv6 = server_settings["use_ipv6"]

1764

2433

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

2434

stored_state_file)

2435

foreground = server_settings["foreground"]

2436

zeroconf = server_settings["zeroconf"]

2437

2438

if debug:

2439

initlogger(debug, logging.DEBUG)

2440

else:

2441

if not debuglevel:

2442

initlogger(debug)

2443

else:

2444

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

2445

initlogger(debug, level)

2446

1765

2447

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

1766

2448

syslogger.setFormatter(logging.Formatter

1767

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

1768

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

1769

% server_settings["servicename"]))

2449

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

2450

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

2451

.format(server_settings

2452

["servicename"])))

1770

2453

1771

2454

# Parse config file with clients

1772

client_defaults = { "timeout": "1h",

1773

"interval": "5m",

1774

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

1775

"host": "",

1776

"approval_delay": "0s",

1777

"approval_duration": "1s",

1778

}

1779

client_config = configparser.SafeConfigParser(client_defaults)

2455

client_config = configparser.SafeConfigParser(Client

2456

.client_defaults)

1780

2457

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

1781

2458

"clients.conf"))

1782

2459

1783

2460

global mandos_dbus_service

1784

2461

mandos_dbus_service = None

1785

2462

2463

socketfd = None

2464

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

2465

socketfd = server_settings["socket"]

1786

2466

tcp_server = MandosServer((server_settings["address"],

1787

2467

server_settings["port"]),

1788

2468

ClientHandler,

1791

2471

use_ipv6=use_ipv6,

1792

2472

gnutls_priority=

1793

2473

server_settings["priority"],

1794

use_dbus=use_dbus)

1795

if not debug:

1796

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

2474

use_dbus=use_dbus,

2475

socketfd=socketfd)

2476

if not foreground:

2477

pidfilename = "/run/mandos.pid"

2478

if not os.path.isdir("/run/."):

2479

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

2480

pidfile = None

1797

2481

try:

1798

2482

pidfile = open(pidfilename, "w")

1799

except IOError:

1800

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

2483

except IOError as e:

2484

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

2485

exc_info=e)

1801

2486

1802

try:

1803

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

1804

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

1805

except KeyError:

2487

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

1806

2488

try:

1807

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

1808

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

2489

uid = pwd.getpwnam(name).pw_uid

2490

gid = pwd.getpwnam(name).pw_gid

2491

break

1809

2492

except KeyError:

1810

try:

1811

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

1812

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

1813

except KeyError:

1814

uid = 65534

1815

gid = 65534

2493

continue

2494

else:

2495

uid = 65534

2496

gid = 65534

1816

2497

try:

1817

2498

os.setgid(gid)

1818

2499

os.setuid(uid)

1819

except OSError, error:

1820

if error[0] != errno.EPERM:

1821

raise error

2500

except OSError as error:

2501

if error.errno != errno.EPERM:

2502

raise

1822

2503

1823

if not debug and not debuglevel:

1824

syslogger.setLevel(logging.WARNING)

1825

console.setLevel(logging.WARNING)

1826

if debuglevel:

1827

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

1828

syslogger.setLevel(level)

1829

console.setLevel(level)

1830

1831

2504

if debug:

1832

2505

# Enable all possible GnuTLS debugging

1833

2506

1843

2516

.gnutls_global_set_log_function(debug_gnutls))

1844

2517

1845

2518

# Redirect stdin so all checkers get /dev/null

1846

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

2519

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

1847

2520

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

1848

2521

if null > 2:

1849

2522

os.close(null)

1850

else:

1851

# No console logging

1852

logger.removeHandler(console)

1853

2523

1854

2524

# Need to fork before connecting to D-Bus

1855

if not debug:

2525

if not foreground:

1856

2526

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

1857

2527

daemon()

1858

2528

2529

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

2530

# need to inform gobject that threads will be used.

2531

gobject.threads_init()

2532

1859

2533

global main_loop

1860

2534

# From the Avahi example code

1861

DBusGMainLoop(set_as_default=True )

2535

DBusGMainLoop(set_as_default=True)

1862

2536

main_loop = gobject.MainLoop()

1863

2537

bus = dbus.SystemBus()

1864

2538

# End of Avahi example code

1865

2539

if use_dbus:

1866

2540

try:

1867

bus_name = dbus.service.BusName("se.bsnet.fukt.Mandos",

2541

bus_name = dbus.service.BusName("se.recompile.Mandos",

1868

2542

bus, do_not_queue=True)

1869

except dbus.exceptions.NameExistsException, e:

1870

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

2543

old_bus_name = (dbus.service.BusName

2544

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

2545

do_not_queue=True))

2546

except dbus.exceptions.NameExistsException as e:

2547

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

1871

2548

use_dbus = False

1872

2549

server_settings["use_dbus"] = False

1873

2550

tcp_server.use_dbus = False

1874

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1875

service = AvahiService(name = server_settings["servicename"],

1876

servicetype = "_mandos._tcp",

1877

protocol = protocol, bus = bus)

1878

if server_settings["interface"]:

1879

service.interface = (if_nametoindex

1880

(str(server_settings["interface"])))

2551

if zeroconf:

2552

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2553

service = AvahiServiceToSyslog(name =

2554

server_settings["servicename"],

2555

servicetype = "_mandos._tcp",

2556

protocol = protocol, bus = bus)

2557

if server_settings["interface"]:

2558

service.interface = (if_nametoindex

2559

(server_settings["interface"]

2560

.encode("utf-8")))

1881

2561

1882

2562

global multiprocessing_manager

1883

2563

multiprocessing_manager = multiprocessing.Manager()

1885

2565

client_class = Client

1886

2566

if use_dbus:

1887

2567

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

1888

def client_config_items(config, section):

1889

special_settings = {

1890

"approved_by_default":

1891

lambda: config.getboolean(section,

1892

"approved_by_default"),

1893

}

1894

for name, value in config.items(section):

2568

2569

client_settings = Client.config_parser(client_config)

2570

old_client_settings = {}

2571

clients_data = {}

2572

2573

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

2574

global wnull

2575

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

2576

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

2577

# mode

2578

if debug or not foreground:

2579

wnull.close()

2580

2581

# Get client data and settings from last running state.

2582

if server_settings["restore"]:

2583

try:

2584

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

2585

clients_data, old_client_settings = (pickle.load

2586

(stored_state))

2587

os.remove(stored_state_path)

2588

except IOError as e:

2589

if e.errno == errno.ENOENT:

2590

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

2591

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

2592

else:

2593

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

2594

exc_info=e)

2595

raise

2596

except EOFError as e:

2597

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

2598

"EOFError:", exc_info=e)

2599

2600

with PGPEngine() as pgp:

2601

for client_name, client in clients_data.items():

2602

# Skip removed clients

2603

if client_name not in client_settings:

2604

continue

2605

2606

# Decide which value to use after restoring saved state.

2607

# We have three different values: Old config file,

2608

# new config file, and saved state.

2609

# New config value takes precedence if it differs from old

2610

# config value, otherwise use saved state.

2611

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

2612

try:

2613

# For each value in new config, check if it

2614

# differs from the old config value (Except for

2615

# the "secret" attribute)

2616

if (name != "secret" and

2617

value != old_client_settings[client_name]

2618

[name]):

2619

client[name] = value

2620

except KeyError:

2621

pass

2622

2623

# Clients who has passed its expire date can still be

2624

# enabled if its last checker was successful. Clients

2625

# whose checker succeeded before we stored its state is

2626

# assumed to have successfully run all checkers during

2627

# downtime.

2628

if client["enabled"]:

2629

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

2630

if not client["last_checked_ok"]:

2631

logger.warning(

2632

"disabling client {} - Client never "

2633

"performed a successful checker"

2634

.format(client_name))

2635

client["enabled"] = False

2636

elif client["last_checker_status"] != 0:

2637

logger.warning(

2638

"disabling client {} - Client last"

2639

" checker failed with error code {}"

2640

.format(client_name,

2641

client["last_checker_status"]))

2642

client["enabled"] = False

2643

else:

2644

client["expires"] = (datetime.datetime

2645

.utcnow()

2646

+ client["timeout"])

2647

logger.debug("Last checker succeeded,"

2648

" keeping {} enabled"

2649

.format(client_name))

1895

2650

try:

1896

yield (name, special_settings[name]())

1897

except KeyError:

1898

yield (name, value)

1899

1900

tcp_server.clients.update(set(

1901

client_class(name = section,

1902

config= dict(client_config_items(

1903

client_config, section)))

1904

for section in client_config.sections()))

2651

client["secret"] = (

2652

pgp.decrypt(client["encrypted_secret"],

2653

client_settings[client_name]

2654

["secret"]))

2655

except PGPError:

2656

# If decryption fails, we use secret from new settings

2657

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

2658

.format(client_name))

2659

client["secret"] = (

2660

client_settings[client_name]["secret"])

2661

2662

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

2663

for client_name in (set(old_client_settings)

2664

- set(client_settings)):

2665

del clients_data[client_name]

2666

for client_name in (set(client_settings)

2667

- set(old_client_settings)):

2668

clients_data[client_name] = client_settings[client_name]

2669

2670

# Create all client objects

2671

for client_name, client in clients_data.items():

2672

tcp_server.clients[client_name] = client_class(

2673

name = client_name, settings = client,

2674

server_settings = server_settings)

2675

1905

2676

if not tcp_server.clients:

1906

2677

logger.warning("No clients defined")

1907

1908

if not debug:

1909

try:

1910

with pidfile:

1911

pid = os.getpid()

1912

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

1913

del pidfile

1914

except IOError:

1915

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

1916

pidfilename, pid)

1917

except NameError:

1918

# "pidfile" was never created

1919

pass

2678

2679

if not foreground:

2680

if pidfile is not None:

2681

try:

2682

with pidfile:

2683

pid = os.getpid()

2684

pidfile.write("{}\n".format(pid).encode("utf-8"))

2685

except IOError:

2686

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

2687

pidfilename, pid)

2688

del pidfile

1920

2689

del pidfilename

1921

1922

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

1923

2690

1924

2691

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

1925

2692

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

1926

2693

1927

2694

if use_dbus:

1928

class MandosDBusService(dbus.service.Object):

2695

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

2696

"se.bsnet.fukt.Mandos"})

2697

class MandosDBusService(DBusObjectWithProperties):

1929

2698

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

1930

2699

def __init__(self):

1931

2700

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

1932

_interface = "se.bsnet.fukt.Mandos"

2701

_interface = "se.recompile.Mandos"

2702

2703

@dbus_interface_annotations(_interface)

2704

def _foo(self):

2705

return { "org.freedesktop.DBus.Property"

2706

".EmitsChangedSignal":

2707

"false"}

1933

2708

1934

2709

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

1935

2710

def ClientAdded(self, objpath):

1950

2725

def GetAllClients(self):

1951

2726

"D-Bus method"

1952

2727

return dbus.Array(c.dbus_object_path

1953

for c in tcp_server.clients)

2728

for c in

2729

tcp_server.clients.itervalues())

1954

2730

1955

2731

@dbus.service.method(_interface,

1956

2732

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

1957

2733

def GetAllClientsWithProperties(self):

1958

2734

"D-Bus method"

1959

2735

return dbus.Dictionary(

1960

((c.dbus_object_path, c.GetAll(""))

1961

for c in tcp_server.clients),

2736

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

2737

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

1962

2738

signature="oa{sv}")

1963

2739

1964

2740

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

1965

2741

def RemoveClient(self, object_path):

1966

2742

"D-Bus method"

1967

for c in tcp_server.clients:

2743

for c in tcp_server.clients.itervalues():

1968

2744

if c.dbus_object_path == object_path:

1969

tcp_server.clients.remove(c)

2745

del tcp_server.clients[c.name]

1970

2746

c.remove_from_connection()

1971

2747

# Don't signal anything except ClientRemoved

1972

2748

c.disable(quiet=True)

1981

2757

1982

2758

def cleanup():

1983

2759

"Cleanup function; run on exit"

1984

service.cleanup()

1985

2760

if zeroconf:

2761

service.cleanup()

2762

2763

multiprocessing.active_children()

2764

wnull.close()

2765

if not (tcp_server.clients or client_settings):

2766

return

2767

2768

# Store client before exiting. Secrets are encrypted with key

2769

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

2770

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

2771

clients = {}

2772

with PGPEngine() as pgp:

2773

for client in tcp_server.clients.itervalues():

2774

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

2775

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

2776

key)

2777

client_dict = {}

2778

2779

# A list of attributes that can not be pickled

2780

# + secret.

2781

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

2782

"checker", "server_settings" }

2783

for name, typ in (inspect.getmembers

2784

(dbus.service.Object)):

2785

exclude.add(name)

2786

2787

client_dict["encrypted_secret"] = (client

2788

.encrypted_secret)

2789

for attr in client.client_structure:

2790

if attr not in exclude:

2791

client_dict[attr] = getattr(client, attr)

2792

2793

clients[client.name] = client_dict

2794

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

2795

2796

try:

2797

with (tempfile.NamedTemporaryFile

2798

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

2799

dir=os.path.dirname(stored_state_path),

2800

delete=False)) as stored_state:

2801

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

2802

tempname=stored_state.name

2803

os.rename(tempname, stored_state_path)

2804

except (IOError, OSError) as e:

2805

if not debug:

2806

try:

2807

os.remove(tempname)

2808

except NameError:

2809

pass

2810

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

2811

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

2812

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

2813

else:

2814

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

2815

exc_info=e)

2816

raise

2817

2818

# Delete all clients, and settings from config

1986

2819

while tcp_server.clients:

1987

client = tcp_server.clients.pop()

2820

name, client = tcp_server.clients.popitem()

1988

2821

if use_dbus:

1989

2822

client.remove_from_connection()

1990

client.disable_hook = None

1991

2823

# Don't signal anything except ClientRemoved

1992

2824

client.disable(quiet=True)

1993

2825

if use_dbus:

1994

2826

# Emit D-Bus signal

1995

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2827

mandos_dbus_service.ClientRemoved(client

2828

.dbus_object_path,

1996

2829

client.name)

2830

client_settings.clear()

1997

2831

1998

2832

atexit.register(cleanup)

1999

2833

2000

for client in tcp_server.clients:

2834

for client in tcp_server.clients.itervalues():

2001

2835

if use_dbus:

2002

2836

# Emit D-Bus signal

2003

2837

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2004

client.enable()

2838

# Need to initiate checking of clients

2839

if client.enabled:

2840

client.init_checker()

2005

2841

2006

2842

tcp_server.enable()

2007

2843

tcp_server.server_activate()

2008

2844

2009

2845

# Find out what port we got

2010

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

2846

if zeroconf:

2847

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

2011

2848

if use_ipv6:

2012

2849

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

2013

" flowinfo %d, scope_id %d"

2014

% tcp_server.socket.getsockname())

2850

" flowinfo %d, scope_id %d",

2851

*tcp_server.socket.getsockname())

2015

2852

else: # IPv4

2016

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

2017

% tcp_server.socket.getsockname())

2853

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

2854

*tcp_server.socket.getsockname())

2018

2855

2019

2856

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

2020

2857

2021

2858

try:

2022

# From the Avahi example code

2023

try:

2024

service.activate()

2025

except dbus.exceptions.DBusException, error:

2026

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

2027

cleanup()

2028

sys.exit(1)

2029

# End of Avahi example code

2859

if zeroconf:

2860

# From the Avahi example code

2861

try:

2862

service.activate()

2863

except dbus.exceptions.DBusException as error:

2864

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

2865

cleanup()

2866

sys.exit(1)

2867

# End of Avahi example code

2030

2868

2031

2869

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

2032

2870

lambda *args, **kwargs:

2035

2873

2036

2874

logger.debug("Starting main loop")

2037

2875

main_loop.run()

2038

except AvahiError, error:

2039

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

2876

except AvahiError as error:

2877

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

2040

2878

cleanup()

2041

2879

sys.exit(1)

2042

2880

except KeyboardInterrupt: