/mandos/trunk : revision 463.1.9

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#!/usr/bin/python2.7

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#!/usr/bin/python

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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@recompile.se>.

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# Contact the authors at <mandos@fukt.bsnet.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 optparse

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import datetime

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import errno

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import gnutls.crypto

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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 = "1.6.7"

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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(str("16s16x"),

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interface))

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

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ifreq[16:20])[0]

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return interface_index

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

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"""init logger and add loglevel"""

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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 = 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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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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version = "1.2.3"

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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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class AvahiError(Exception):

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

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Used to optionally bind to the specified interface.

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name: string; Example: 'Mandos'

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

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

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

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port: integer; what port to announce

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TXT: list of strings; TXT record for the service

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

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server: D-Bus Server

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bus: dbus.SystemBus()

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"""

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

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

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

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self.group = None # our entry group

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self.server = None

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self.bus = bus

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self.entry_group_state_changed_match = None

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def rename(self):

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

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if self.rename_count >= self.max_renames:

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" 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

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.GetAlternativeServiceName(self.name))

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

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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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try:

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self.add()

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except dbus.exceptions.DBusException as error:

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

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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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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.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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self.group.connect_to_signal('StateChanged',

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self

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.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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elif state == avahi.ENTRY_GROUP_FAILURE:

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

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unicode(error))

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

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.format(error))

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raise AvahiGroupError("State changed: %s"

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% unicode(error))

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def cleanup(self):

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

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if self.group is not None:

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try:

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self.group.Free()

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except (dbus.exceptions.UnknownMethodException,

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dbus.exceptions.DBusException):

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pass

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self.group.Free()

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self.group = None

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self.remove()

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

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def server_state_changed(self, state):

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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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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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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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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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follow_name_owner_changes=True),

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avahi.DBUS_PATH_SERVER),

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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):

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

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ret = AvahiService.rename(self)

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syslogger.setFormatter(logging.Formatter

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

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

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.format(self.name)))

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return ret

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def timedelta_to_milliseconds(td):

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"Convert a datetime.timedelta() to milliseconds"

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

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+ (td.seconds * 1000)

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+ (td.microseconds // 1000))

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class Client(object):

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

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Attributes:

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

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

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

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

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

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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_checker_status: integer between 0 and 255 reflecting exit

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status of last checker. -1 reflects crashed

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checker, -2 means no checker completed yet.

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

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last_enabled: datetime.datetime(); (UTC)

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

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D-Bus identifiers

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

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

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until this client is disabled

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extended_timeout: extra long timeout when secret has been sent

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runtime_expansions: Allowed attributes for runtime expansion.

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

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disabled, or None

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server_settings: The server_settings dict from main()

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"""

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runtime_expansions = ("approval_delay", "approval_duration",

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

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

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"last_approval_request", "last_checked_ok",

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

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

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

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client_defaults = { "timeout": "PT5M",

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"extended_timeout": "PT15M",

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"interval": "PT2M",

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

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"host": "",

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"approval_delay": "PT0S",

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"approval_duration": "PT1S",

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"approved_by_default": "True",

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"enabled": "True",

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}

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@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 timedelta_to_milliseconds(self.timeout)

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def extended_timeout_milliseconds(self):

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"Return the 'extended_timeout' attribute in milliseconds"

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return timedelta_to_milliseconds(self.extended_timeout)

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return 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 timedelta_to_milliseconds(self.interval)

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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 timedelta_to_milliseconds(self.approval_delay)

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@staticmethod

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def config_parser(config):

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

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

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with exceptions for any special settings as defined above.

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

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value given the same arguments.

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"""

494

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

501

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,

504

"enabled")

505

506

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

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.replace(" ", ""))

508

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

512

(section["secfile"])),

513

"rb") as secfile:

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

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else:

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

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.format(section))

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

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client["extended_timeout"] = string_to_delta(

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section["extended_timeout"])

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

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client["approval_delay"] = string_to_delta(

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section["approval_delay"])

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client["approval_duration"] = string_to_delta(

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section["approval_duration"])

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

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client["last_approval_request"] = None

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client["last_checked_ok"] = None

529

client["last_checker_status"] = -2

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return settings

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533

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

297

return self._timedelta_to_milliseconds(self.approval_delay)

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

300

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

301

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

302

attribute."""

534

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self.name = name

535

if server_settings is None:

536

server_settings = {}

537

self.server_settings = server_settings

538

# adding all client settings

539

for setting, value in settings.iteritems():

540

setattr(self, setting, value)

541

542

if self.enabled:

543

if not hasattr(self, "last_enabled"):

544

self.last_enabled = datetime.datetime.utcnow()

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if not hasattr(self, "expires"):

546

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

547

+ self.timeout)

548

else:

549

self.last_enabled = None

550

self.expires = None

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if config is None:

305

config = {}

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

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# Uppercase and remove spaces from fingerprint for later

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# comparison purposes with return value from the fingerprint()

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# function

310

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

311

.replace(" ", ""))

556

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

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

558

datetime.datetime.utcnow())

559

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# attributes specific for this server instance

313

if "secret" in config:

314

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

315

elif "secfile" in config:

316

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

317

(config["secfile"])),

318

"rb") as secfile:

319

self.secret = secfile.read()

320

else:

321

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

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% self.name)

323

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

324

self.created = datetime.datetime.utcnow()

325

self.enabled = False

326

self.last_approval_request = None

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self.last_enabled = None

328

self.last_checked_ok = None

329

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

330

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

331

self.disable_hook = disable_hook

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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

336

self.checker_command = config["checker"]

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self.current_checker_command = None

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self.approved = None

338

self.last_connect = None

339

self._approved = None

340

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

341

True)

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self.approvals_pending = 0

568

self.changedstate = (multiprocessing_manager

569

.Condition(multiprocessing_manager

570

.Lock()))

571

self.client_structure = [attr for attr in

572

self.__dict__.iterkeys()

573

if not attr.startswith("_")]

574

self.client_structure.append("client_structure")

575

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

577

lambda obj:

578

isinstance(obj,

579

property)):

580

if not name.startswith("_"):

581

self.client_structure.append(name)

343

self.approval_delay = string_to_delta(

344

config["approval_delay"])

345

self.approval_duration = string_to_delta(

346

config["approval_duration"])

347

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

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348

583

# Send notice to process children that client state has changed

584

349

def send_changedstate(self):

585

with self.changedstate:

586

self.changedstate.notify_all()

587

350

self.changedstate.acquire()

351

self.changedstate.notify_all()

352

self.changedstate.release()

353

588

354

def enable(self):

589

355

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

590

356

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

591

357

# Already enabled

592

358

return

593

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

594

self.enabled = True

359

self.send_changedstate()

595

360

self.last_enabled = datetime.datetime.utcnow()

596

self.init_checker()

597

self.send_changedstate()

598

599

def disable(self, quiet=True):

600

"""Disable this client."""

601

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

602

return False

603

if not quiet:

604

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

605

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

606

gobject.source_remove(self.disable_initiator_tag)

607

self.disable_initiator_tag = None

608

self.expires = None

609

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

610

gobject.source_remove(self.checker_initiator_tag)

611

self.checker_initiator_tag = None

612

self.stop_checker()

613

self.enabled = False

614

if not quiet:

615

self.send_changedstate()

616

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

617

return False

618

619

def __del__(self):

620

self.disable()

621

622

def init_checker(self):

623

361

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

624

362

# and every interval from then on.

625

if self.checker_initiator_tag is not None:

626

gobject.source_remove(self.checker_initiator_tag)

627

363

self.checker_initiator_tag = (gobject.timeout_add

628

364

(self.interval_milliseconds(),

629

365

self.start_checker))

630

366

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

631

if self.disable_initiator_tag is not None:

632

gobject.source_remove(self.disable_initiator_tag)

633

367

self.disable_initiator_tag = (gobject.timeout_add

634

368

(self.timeout_milliseconds(),

635

369

self.disable))

370

self.enabled = True

636

371

# Also start a new checker *right now*.

637

372

self.start_checker()

638

373

374

def disable(self, quiet=True):

375

"""Disable this client."""

376

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

377

return False

378

if not quiet:

379

self.send_changedstate()

380

if not quiet:

381

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

382

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

383

gobject.source_remove(self.disable_initiator_tag)

384

self.disable_initiator_tag = None

385

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

386

gobject.source_remove(self.checker_initiator_tag)

387

self.checker_initiator_tag = None

388

self.stop_checker()

389

if self.disable_hook:

390

self.disable_hook(self)

391

self.enabled = False

392

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

393

return False

394

395

def __del__(self):

396

self.disable_hook = None

397

self.disable()

398

639

399

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

640

400

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

641

401

self.checker_callback_tag = None

642

402

self.checker = None

643

403

if os.WIFEXITED(condition):

644

self.last_checker_status = os.WEXITSTATUS(condition)

645

if self.last_checker_status == 0:

404

exitstatus = os.WEXITSTATUS(condition)

405

if exitstatus == 0:

646

406

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

647

407

vars(self))

648

408

self.checked_ok()

650

410

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

651

411

vars(self))

652

412

else:

653

self.last_checker_status = -1

654

413

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

655

414

vars(self))

656

415

657

416

def checked_ok(self):

658

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

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

"""

659

422

self.last_checked_ok = datetime.datetime.utcnow()

660

self.last_checker_status = 0

661

self.bump_timeout()

662

663

def bump_timeout(self, timeout=None):

664

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

665

if timeout is None:

666

timeout = self.timeout

667

if self.disable_initiator_tag is not None:

668

gobject.source_remove(self.disable_initiator_tag)

669

self.disable_initiator_tag = None

670

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

671

self.disable_initiator_tag = (gobject.timeout_add

672

(timedelta_to_milliseconds

673

(timeout), self.disable))

674

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

423

gobject.source_remove(self.disable_initiator_tag)

424

self.disable_initiator_tag = (gobject.timeout_add

425

(self.timeout_milliseconds(),

426

self.disable))

675

427

676

428

def need_approval(self):

677

429

self.last_approval_request = datetime.datetime.utcnow()

682

434

If a checker already exists, leave it running and do

683

435

nothing."""

684

436

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

685

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

686

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

687

# would inevitably timeout, since no checker would get a

688

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

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

689

441

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

690

442

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

691

443

# should be.

693

445

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

694

446

try:

695

447

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

696

except AttributeError:

697

pass

698

except OSError as error:

699

if error.errno != errno.ECHILD:

700

raise

448

except (AttributeError, OSError), error:

449

if (isinstance(error, OSError)

450

and error.errno != errno.ECHILD):

451

raise error

701

452

else:

702

453

if pid:

703

454

logger.warning("Checker was a zombie")

706

457

self.current_checker_command)

707

458

# Start a new checker if needed

708

459

if self.checker is None:

709

# Escape attributes for the shell

710

escaped_attrs = dict(

711

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

712

for attr in

713

self.runtime_expansions)

714

460

try:

715

command = self.checker_command % escaped_attrs

716

except TypeError as error:

717

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

718

self.checker_command, exc_info=error)

719

return True # Try again later

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

720

479

self.current_checker_command = command

721

480

try:

722

481

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

725

484

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

726

485

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

727

486

# always replaced by /dev/null.)

728

# The exception is when not debugging but nevertheless

729

# running in the foreground; use the previously

730

# created wnull.

731

popen_args = {}

732

if (not self.server_settings["debug"]

733

and self.server_settings["foreground"]):

734

popen_args.update({"stdout": wnull,

735

"stderr": wnull })

736

487

self.checker = subprocess.Popen(command,

737

488

close_fds=True,

738

shell=True, cwd="/",

739

**popen_args)

740

except OSError as error:

741

logger.error("Failed to start subprocess",

742

exc_info=error)

743

return True

744

self.checker_callback_tag = (gobject.child_watch_add

745

(self.checker.pid,

746

self.checker_callback,

747

data=command))

748

# The checker may have completed before the gobject

749

# watch was added. Check for this.

750

try:

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.

751

496

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

752

except OSError as error:

753

if error.errno == errno.ECHILD:

754

# This should never happen

755

logger.error("Child process vanished",

756

exc_info=error)

757

return True

758

raise

759

if pid:

760

gobject.source_remove(self.checker_callback_tag)

761

self.checker_callback(pid, status, command)

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)

762

503

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

763

504

return True

764

505

771

512

return

772

513

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

773

514

try:

774

self.checker.terminate()

515

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

775

516

#time.sleep(0.5)

776

517

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

777

# self.checker.kill()

778

except OSError as error:

518

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

519

except OSError, error:

779

520

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

780

521

raise

781

522

self.checker = None

782

523

783

784

524

def dbus_service_property(dbus_interface, signature="v",

785

525

access="readwrite", byte_arrays=False):

786

526

"""Decorators for marking methods of a DBusObjectWithProperties to

797

537

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

798

538

if byte_arrays and signature != "ay":

799

539

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

800

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

540

" signature %r" % signature)

801

541

def decorator(func):

802

542

func._dbus_is_property = True

803

543

func._dbus_interface = dbus_interface

811

551

return decorator

812

552

813

553

814

def dbus_interface_annotations(dbus_interface):

815

"""Decorator for marking functions returning interface annotations

816

817

Usage:

818

819

@dbus_interface_annotations("org.example.Interface")

820

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

821

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

822

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

823

"false"}

824

"""

825

def decorator(func):

826

func._dbus_is_interface = True

827

func._dbus_interface = dbus_interface

828

func._dbus_name = dbus_interface

829

return func

830

return decorator

831

832

833

def dbus_annotations(annotations):

834

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

835

Usage:

836

837

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

838

access="r")

839

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

840

"org.freedesktop.DBus.Property."

841

"EmitsChangedSignal": "false"})

842

def Property_dbus_property(self):

843

return dbus.Boolean(False)

844

"""

845

def decorator(func):

846

func._dbus_annotations = annotations

847

return func

848

return decorator

849

850

851

554

class DBusPropertyException(dbus.exceptions.DBusException):

852

555

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

853

556

"""

869

572

870

573

class DBusObjectWithProperties(dbus.service.Object):

871

574

"""A D-Bus object with properties.

872

575

873

576

Classes inheriting from this can use the dbus_service_property

874

577

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

875

578

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

876

579

"""

877

580

878

581

@staticmethod

879

def _is_dbus_thing(thing):

880

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

881

882

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

883

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

884

"""

885

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

886

False)

582

def _is_dbus_property(obj):

583

return getattr(obj, "_dbus_is_property", False)

887

584

888

def _get_all_dbus_things(self, thing):

585

def _get_all_dbus_properties(self):

889

586

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

890

587

"""

891

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

892

name),

893

athing.__get__(self))

894

for cls in self.__class__.__mro__

895

for name, athing in

896

inspect.getmembers(cls,

897

self._is_dbus_thing(thing)))

588

return ((prop._dbus_name, prop)

589

for name, prop in

590

inspect.getmembers(self, self._is_dbus_property))

898

591

899

592

def _get_dbus_property(self, interface_name, property_name):

900

593

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

901

594

property with the specified name and interface.

902

595

"""

903

for cls in self.__class__.__mro__:

904

for name, value in (inspect.getmembers

905

(cls,

906

self._is_dbus_thing("property"))):

907

if (value._dbus_name == property_name

908

and value._dbus_interface == interface_name):

909

return value.__get__(self)

910

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

911

606

# No such property

912

607

raise DBusPropertyNotFound(self.dbus_object_path + ":"

913

608

+ interface_name + "."

937

632

# The byte_arrays option is not supported yet on

938

633

# signatures other than "ay".

939

634

if prop._dbus_signature != "ay":

940

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

941

"'ay' signature {0!r}"

942

.format(prop._dbus_signature))

943

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

944

for byte in value))

635

raise ValueError

636

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

637

for byte in value))

945

638

prop(value)

946

639

947

640

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

949

642

def GetAll(self, interface_name):

950

643

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

951

644

standard.

952

645

953

646

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

954

647

"""

955

properties = {}

956

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

648

all = {}

649

for name, prop in self._get_all_dbus_properties():

957

650

if (interface_name

958

651

and interface_name != prop._dbus_interface):

959

652

# Interface non-empty but did not match

963

656

continue

964

657

value = prop()

965

658

if not hasattr(value, "variant_level"):

966

properties[name] = value

659

all[name] = value

967

660

continue

968

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

969

value.variant_level+1)

970

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

661

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

662

value.variant_level+1)

663

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

971

664

972

665

@dbus.service.method(dbus.INTROSPECTABLE_IFACE,

973

666

out_signature="s",

974

667

path_keyword='object_path',

975

668

connection_keyword='connection')

976

669

def Introspect(self, object_path, connection):

977

"""Overloading of standard D-Bus method.

978

979

Inserts property tags and interface annotation tags.

670

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

980

671

"""

981

672

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

982

673

connection)

989

680

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

990

681

return e

991

682

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

992

# Add property tags

993

683

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

994

684

for name, prop

995

in self._get_all_dbus_things("property")

685

in self._get_all_dbus_properties()

996

686

if prop._dbus_interface

997

687

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

998

688

if_tag.appendChild(tag)

999

# Add annotation tags

1000

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

1001

for tag in if_tag.getElementsByTagName(typ):

1002

annots = dict()

1003

for name, prop in (self.

1004

_get_all_dbus_things(typ)):

1005

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

1006

and prop._dbus_interface

1007

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

1008

annots.update(getattr

1009

(prop,

1010

"_dbus_annotations",

1011

{}))

1012

for name, value in annots.iteritems():

1013

ann_tag = document.createElement(

1014

"annotation")

1015

ann_tag.setAttribute("name", name)

1016

ann_tag.setAttribute("value", value)

1017

tag.appendChild(ann_tag)

1018

# Add interface annotation tags

1019

for annotation, value in dict(

1020

itertools.chain.from_iterable(

1021

annotations().iteritems()

1022

for name, annotations in

1023

self._get_all_dbus_things("interface")

1024

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

1025

)).iteritems():

1026

ann_tag = document.createElement("annotation")

1027

ann_tag.setAttribute("name", annotation)

1028

ann_tag.setAttribute("value", value)

1029

if_tag.appendChild(ann_tag)

1030

689

# Add the names to the return values for the

1031

690

# "org.freedesktop.DBus.Properties" methods

1032

691

if (if_tag.getAttribute("name")

1045

704

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

1046

705

document.unlink()

1047

706

except (AttributeError, xml.dom.DOMException,

1048

xml.parsers.expat.ExpatError) as error:

707

xml.parsers.expat.ExpatError), error:

1049

708

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

1050

exc_info=error)

709

error)

1051

710

return xmlstring

1052

711

1053

712

1054

def datetime_to_dbus(dt, variant_level=0):

1055

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

1056

if dt is None:

1057

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

1058

return dbus.String(dt.isoformat(),

1059

variant_level=variant_level)

1060

1061

1062

def alternate_dbus_interfaces(alt_interface_names, deprecate=True):

1063

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

1064

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

1065

interface names according to the "alt_interface_names" mapping.

1066

Usage:

1067

1068

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

1069

"net.example.AlternateInterface"})

1070

class SampleDBusObject(dbus.service.Object):

1071

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

1072

def SampleDBusMethod():

1073

pass

1074

1075

The above "SampleDBusMethod" on "SampleDBusObject" will be

1076

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

1077

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

1078

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

1079

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

1080

1081

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

1082

(from DBusObjectWithProperties) and interfaces (from the

1083

dbus_interface_annotations decorator).

1084

"""

1085

def wrapper(cls):

1086

for orig_interface_name, alt_interface_name in (

1087

alt_interface_names.iteritems()):

1088

attr = {}

1089

interface_names = set()

1090

# Go though all attributes of the class

1091

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

1092

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

1093

# with the wrong interface name

1094

if (not hasattr(attribute, "_dbus_interface")

1095

or not attribute._dbus_interface

1096

.startswith(orig_interface_name)):

1097

continue

1098

# Create an alternate D-Bus interface name based on

1099

# the current name

1100

alt_interface = (attribute._dbus_interface

1101

.replace(orig_interface_name,

1102

alt_interface_name))

1103

interface_names.add(alt_interface)

1104

# Is this a D-Bus signal?

1105

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

1106

# Extract the original non-method undecorated

1107

# function by black magic

1108

nonmethod_func = (dict(

1109

zip(attribute.func_code.co_freevars,

1110

attribute.__closure__))["func"]

1111

.cell_contents)

1112

# Create a new, but exactly alike, function

1113

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

1114

# with the alternate D-Bus interface name

1115

new_function = (dbus.service.signal

1116

(alt_interface,

1117

attribute._dbus_signature)

1118

(types.FunctionType(

1119

nonmethod_func.func_code,

1120

nonmethod_func.func_globals,

1121

nonmethod_func.func_name,

1122

nonmethod_func.func_defaults,

1123

nonmethod_func.func_closure)))

1124

# Copy annotations, if any

1125

try:

1126

new_function._dbus_annotations = (

1127

dict(attribute._dbus_annotations))

1128

except AttributeError:

1129

pass

1130

# Define a creator of a function to call both the

1131

# original and alternate functions, so both the

1132

# original and alternate signals gets sent when

1133

# the function is called

1134

def fixscope(func1, func2):

1135

"""This function is a scope container to pass

1136

func1 and func2 to the "call_both" function

1137

outside of its arguments"""

1138

def call_both(*args, **kwargs):

1139

"""This function will emit two D-Bus

1140

signals by calling func1 and func2"""

1141

func1(*args, **kwargs)

1142

func2(*args, **kwargs)

1143

return call_both

1144

# Create the "call_both" function and add it to

1145

# the class

1146

attr[attrname] = fixscope(attribute, new_function)

1147

# Is this a D-Bus method?

1148

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

1149

# Create a new, but exactly alike, function

1150

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

1151

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

1152

# to the class.

1153

attr[attrname] = (dbus.service.method

1154

(alt_interface,

1155

attribute._dbus_in_signature,

1156

attribute._dbus_out_signature)

1157

(types.FunctionType

1158

(attribute.func_code,

1159

attribute.func_globals,

1160

attribute.func_name,

1161

attribute.func_defaults,

1162

attribute.func_closure)))

1163

# Copy annotations, if any

1164

try:

1165

attr[attrname]._dbus_annotations = (

1166

dict(attribute._dbus_annotations))

1167

except AttributeError:

1168

pass

1169

# Is this a D-Bus property?

1170

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

1171

# Create a new, but exactly alike, function

1172

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

1173

# property with the alternate D-Bus interface

1174

# name. Add it to the class.

1175

attr[attrname] = (dbus_service_property

1176

(alt_interface,

1177

attribute._dbus_signature,

1178

attribute._dbus_access,

1179

attribute

1180

._dbus_get_args_options

1181

["byte_arrays"])

1182

(types.FunctionType

1183

(attribute.func_code,

1184

attribute.func_globals,

1185

attribute.func_name,

1186

attribute.func_defaults,

1187

attribute.func_closure)))

1188

# Copy annotations, if any

1189

try:

1190

attr[attrname]._dbus_annotations = (

1191

dict(attribute._dbus_annotations))

1192

except AttributeError:

1193

pass

1194

# Is this a D-Bus interface?

1195

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

1196

# Create a new, but exactly alike, function

1197

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

1198

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

1199

# to the class.

1200

attr[attrname] = (dbus_interface_annotations

1201

(alt_interface)

1202

(types.FunctionType

1203

(attribute.func_code,

1204

attribute.func_globals,

1205

attribute.func_name,

1206

attribute.func_defaults,

1207

attribute.func_closure)))

1208

if deprecate:

1209

# Deprecate all alternate interfaces

1210

iname="_AlternateDBusNames_interface_annotation{0}"

1211

for interface_name in interface_names:

1212

@dbus_interface_annotations(interface_name)

1213

def func(self):

1214

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

1215

"true" }

1216

# Find an unused name

1217

for aname in (iname.format(i)

1218

for i in itertools.count()):

1219

if aname not in attr:

1220

attr[aname] = func

1221

break

1222

if interface_names:

1223

# Replace the class with a new subclass of it with

1224

# methods, signals, etc. as created above.

1225

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

1226

(cls,), attr)

1227

return cls

1228

return wrapper

1229

1230

1231

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

1232

"se.bsnet.fukt.Mandos"})

1233

713

class ClientDBus(Client, DBusObjectWithProperties):

1234

714

"""A Client class using D-Bus

1235

715

1244

724

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

1245

725

1246

726

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

727

self._approvals_pending = 0

1247

728

self.bus = bus

1248

729

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

1249

730

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

1255

736

("/clients/" + client_object_name))

1256

737

DBusObjectWithProperties.__init__(self, self.bus,

1257

738

self.dbus_object_path)

1258

1259

def notifychangeproperty(transform_func,

1260

dbus_name, type_func=lambda x: x,

1261

variant_level=1):

1262

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

1263

its changes to DBus.

1264

1265

transform_fun: Function that takes a value and a variant_level

1266

and transforms it to a D-Bus type.

1267

dbus_name: D-Bus name of the variable

1268

type_func: Function that transform the value before sending it

1269

to the D-Bus. Default: no transform

1270

variant_level: D-Bus variant level. Default: 1

1271

"""

1272

attrname = "_{0}".format(dbus_name)

1273

def setter(self, value):

1274

if hasattr(self, "dbus_object_path"):

1275

if (not hasattr(self, attrname) or

1276

type_func(getattr(self, attrname, None))

1277

!= type_func(value)):

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

setattr(self, attrname, value)

1284

1285

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

1286

1287

expires = notifychangeproperty(datetime_to_dbus, "Expires")

1288

approvals_pending = notifychangeproperty(dbus.Boolean,

1289

"ApprovalPending",

1290

type_func = bool)

1291

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

1292

last_enabled = notifychangeproperty(datetime_to_dbus,

1293

"LastEnabled")

1294

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

1295

type_func = lambda checker:

1296

checker is not None)

1297

last_checked_ok = notifychangeproperty(datetime_to_dbus,

1298

"LastCheckedOK")

1299

last_checker_status = notifychangeproperty(dbus.Int16,

1300

"LastCheckerStatus")

1301

last_approval_request = notifychangeproperty(

1302

datetime_to_dbus, "LastApprovalRequest")

1303

approved_by_default = notifychangeproperty(dbus.Boolean,

1304

"ApprovedByDefault")

1305

approval_delay = notifychangeproperty(dbus.UInt64,

1306

"ApprovalDelay",

1307

type_func =

1308

timedelta_to_milliseconds)

1309

approval_duration = notifychangeproperty(

1310

dbus.UInt64, "ApprovalDuration",

1311

type_func = timedelta_to_milliseconds)

1312

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

1313

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

1314

type_func =

1315

timedelta_to_milliseconds)

1316

extended_timeout = notifychangeproperty(

1317

dbus.UInt64, "ExtendedTimeout",

1318

type_func = timedelta_to_milliseconds)

1319

interval = notifychangeproperty(dbus.UInt64,

1320

"Interval",

1321

type_func =

1322

timedelta_to_milliseconds)

1323

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

1324

1325

del notifychangeproperty

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

1326

783

1327

784

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

1328

785

try:

1337

794

*args, **kwargs):

1338

795

self.checker_callback_tag = None

1339

796

self.checker = None

797

# Emit D-Bus signal

798

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

799

dbus.Boolean(False, variant_level=1))

1340

800

if os.WIFEXITED(condition):

1341

801

exitstatus = os.WEXITSTATUS(condition)

1342

802

# Emit D-Bus signal

1352

812

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

1353

813

*args, **kwargs)

1354

814

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

1355

833

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

1356

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

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

1357

839

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

1358

840

# Only if new checker process was started

1359

841

if (self.checker is not None

1360

842

and old_checker_pid != self.checker.pid):

1361

843

# Emit D-Bus signal

1362

844

self.CheckerStarted(self.current_checker_command)

845

self.PropertyChanged(

846

dbus.String("CheckerRunning"),

847

dbus.Boolean(True, variant_level=1))

1363

848

return r

1364

849

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

1365

859

def _reset_approved(self):

1366

self.approved = None

860

self._approved = None

1367

861

return False

1368

862

1369

863

def approve(self, value=True):

1370

self.approved = value

1371

gobject.timeout_add(timedelta_to_milliseconds

864

self.send_changedstate()

865

self._approved = value

866

gobject.timeout_add(self._timedelta_to_milliseconds

1372

867

(self.approval_duration),

1373

868

self._reset_approved)

1374

self.send_changedstate()

869

1375

870

1376

871

## D-Bus methods, signals & properties

1377

_interface = "se.recompile.Mandos.Client"

1378

1379

## Interfaces

1380

1381

@dbus_interface_annotations(_interface)

1382

def _foo(self):

1383

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

1384

"false"}

872

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

1385

873

1386

874

## Signals

1387

875

1434

922

# CheckedOK - method

1435

923

@dbus.service.method(_interface)

1436

924

def CheckedOK(self):

1437

self.checked_ok()

925

return self.checked_ok()

1438

926

1439

927

# Enable - method

1440

928

@dbus.service.method(_interface)

1473

961

if value is None: # get

1474

962

return dbus.Boolean(self.approved_by_default)

1475

963

self.approved_by_default = bool(value)

964

# Emit D-Bus signal

965

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

966

dbus.Boolean(value, variant_level=1))

1476

967

1477

968

# ApprovalDelay - property

1478

969

@dbus_service_property(_interface, signature="t",

1481

972

if value is None: # get

1482

973

return dbus.UInt64(self.approval_delay_milliseconds())

1483

974

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))

1484

978

1485

979

# ApprovalDuration - property

1486

980

@dbus_service_property(_interface, signature="t",

1487

981

access="readwrite")

1488

982

def ApprovalDuration_dbus_property(self, value=None):

1489

983

if value is None: # get

1490

return dbus.UInt64(timedelta_to_milliseconds(

984

return dbus.UInt64(self._timedelta_to_milliseconds(

1491

985

self.approval_duration))

1492

986

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))

1493

990

1494

991

# Name - property

1495

992

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

1507

1004

def Host_dbus_property(self, value=None):

1508

1005

if value is None: # get

1509

1006

return dbus.String(self.host)

1510

self.host = unicode(value)

1007

self.host = value

1008

# Emit D-Bus signal

1009

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

1010

dbus.String(value, variant_level=1))

1511

1011

1512

1012

# Created - property

1513

1013

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

1514

1014

def Created_dbus_property(self):

1515

return datetime_to_dbus(self.created)

1015

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

1516

1016

1517

1017

# LastEnabled - property

1518

1018

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

1519

1019

def LastEnabled_dbus_property(self):

1520

return datetime_to_dbus(self.last_enabled)

1020

if self.last_enabled is None:

1021

return dbus.String("")

1022

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

1521

1023

1522

1024

# Enabled - property

1523

1025

@dbus_service_property(_interface, signature="b",

1537

1039

if value is not None:

1538

1040

self.checked_ok()

1539

1041

return

1540

return datetime_to_dbus(self.last_checked_ok)

1541

1542

# LastCheckerStatus - property

1543

@dbus_service_property(_interface, signature="n",

1544

access="read")

1545

def LastCheckerStatus_dbus_property(self):

1546

return dbus.Int16(self.last_checker_status)

1547

1548

# Expires - property

1549

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

1550

def Expires_dbus_property(self):

1551

return datetime_to_dbus(self.expires)

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))

1552

1046

1553

1047

# LastApprovalRequest - property

1554

1048

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

1555

1049

def LastApprovalRequest_dbus_property(self):

1556

return datetime_to_dbus(self.last_approval_request)

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))

1557

1055

1558

1056

# Timeout - property

1559

1057

@dbus_service_property(_interface, signature="t",

1561

1059

def Timeout_dbus_property(self, value=None):

1562

1060

if value is None: # get

1563

1061

return dbus.UInt64(self.timeout_milliseconds())

1564

old_timeout = self.timeout

1565

1062

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

1566

# Reschedule disabling

1567

if self.enabled:

1568

now = datetime.datetime.utcnow()

1569

self.expires += self.timeout - old_timeout

1570

if self.expires <= now:

1571

# The timeout has passed

1572

self.disable()

1573

else:

1574

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

1575

is None):

1576

return

1577

gobject.source_remove(self.disable_initiator_tag)

1578

self.disable_initiator_tag = (

1579

gobject.timeout_add(

1580

timedelta_to_milliseconds(self.expires - now),

1581

self.disable))

1582

1583

# ExtendedTimeout - property

1584

@dbus_service_property(_interface, signature="t",

1585

access="readwrite")

1586

def ExtendedTimeout_dbus_property(self, value=None):

1587

if value is None: # get

1588

return dbus.UInt64(self.extended_timeout_milliseconds())

1589

self.extended_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))

1590

1083

1591

1084

# Interval - property

1592

1085

@dbus_service_property(_interface, signature="t",

1595

1088

if value is None: # get

1596

1089

return dbus.UInt64(self.interval_milliseconds())

1597

1090

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))

1598

1094

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

1599

1095

return

1600

if self.enabled:

1601

# Reschedule checker run

1602

gobject.source_remove(self.checker_initiator_tag)

1603

self.checker_initiator_tag = (gobject.timeout_add

1604

(value, self.start_checker))

1605

self.start_checker() # Start one now, too

1606

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

1607

1102

# Checker - property

1608

1103

@dbus_service_property(_interface, signature="s",

1609

1104

access="readwrite")

1610

1105

def Checker_dbus_property(self, value=None):

1611

1106

if value is None: # get

1612

1107

return dbus.String(self.checker_command)

1613

self.checker_command = unicode(value)

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))

1614

1113

1615

1114

# CheckerRunning - property

1616

1115

@dbus_service_property(_interface, signature="b",

1643

1142

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

1644

1143

if not self._pipe.recv():

1645

1144

raise KeyError()

1646

1145

1647

1146

def __getattribute__(self, name):

1648

if name == '_pipe':

1147

if(name == '_pipe'):

1649

1148

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

1650

1149

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

1651

1150

data = self._pipe.recv()

1656

1155

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

1657

1156

return self._pipe.recv()[1]

1658

1157

return func

1659

1158

1660

1159

def __setattr__(self, name, value):

1661

if name == '_pipe':

1160

if(name == '_pipe'):

1662

1161

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

1663

1162

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

1664

1163

1675

1174

unicode(self.client_address))

1676

1175

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

1677

1176

self.server.child_pipe.fileno())

1678

1177

1679

1178

session = (gnutls.connection

1680

1179

.ClientSession(self.request,

1681

1180

gnutls.connection

1682

1181

.X509Credentials()))

1683

1182

1684

1183

# Note: gnutls.connection.X509Credentials is really a

1685

1184

# generic GnuTLS certificate credentials object so long as

1686

1185

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

1687

1186

# here despite using OpenPGP certificates.

1688

1187

1689

1188

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

1690

1189

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

1691

1190

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

1697

1196

(gnutls.library.functions

1698

1197

.gnutls_priority_set_direct(session._c_object,

1699

1198

priority, None))

1700

1199

1701

1200

# Start communication using the Mandos protocol

1702

1201

# Get protocol number

1703

1202

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

1704

1203

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

1705

1204

try:

1706

1205

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

1707

raise RuntimeError(line)

1708

except (ValueError, IndexError, RuntimeError) as error:

1206

raise RuntimeError

1207

except (ValueError, IndexError, RuntimeError), error:

1709

1208

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

1710

1209

return

1711

1210

1712

1211

# Start GnuTLS connection

1713

1212

try:

1714

1213

session.handshake()

1715

except gnutls.errors.GNUTLSError as error:

1214

except gnutls.errors.GNUTLSError, error:

1716

1215

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

1717

1216

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

1718

1217

# established. Just abandon the request.

1719

1218

return

1720

1219

logger.debug("Handshake succeeded")

1721

1220

1722

1221

approval_required = False

1723

1222

try:

1724

1223

try:

1725

1224

fpr = self.fingerprint(self.peer_certificate

1726

1225

(session))

1727

except (TypeError,

1728

gnutls.errors.GNUTLSError) as error:

1226

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

1729

1227

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

1730

1228

return

1731

1229

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

1732

1230

1733

1231

try:

1734

1232

client = ProxyClient(child_pipe, fpr,

1735

1233

self.client_address)

1743

1241

1744

1242

while True:

1745

1243

if not client.enabled:

1746

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

1244

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

1747

1245

client.name)

1748

1246

if self.server.use_dbus:

1749

1247

# Emit D-Bus signal

1750

client.Rejected("Disabled")

1248

client.Rejected("Disabled")

1751

1249

return

1752

1250

1753

if client.approved or not client.approval_delay:

1251

if client._approved or not client.approval_delay:

1754

1252

#We are approved or approval is disabled

1755

1253

break

1756

elif client.approved is None:

1254

elif client._approved is None:

1757

1255

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

1758

1256

client.name)

1759

1257

if self.server.use_dbus:

1770

1268

return

1771

1269

1772

1270

#wait until timeout or approved

1271

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

1773

1272

time = datetime.datetime.now()

1774

1273

client.changedstate.acquire()

1775

client.changedstate.wait(

1776

float(timedelta_to_milliseconds(delay)

1777

/ 1000))

1274

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

1778

1275

client.changedstate.release()

1779

1276

time2 = datetime.datetime.now()

1780

1277

if (time2 - time) >= delay:

1795

1292

while sent_size < len(client.secret):

1796

1293

try:

1797

1294

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

1798

except gnutls.errors.GNUTLSError as error:

1799

logger.warning("gnutls send failed",

1800

exc_info=error)

1295

except (gnutls.errors.GNUTLSError), error:

1296

logger.warning("gnutls send failed")

1801

1297

return

1802

1298

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

1803

1299

sent, len(client.secret)

1804

1300

- (sent_size + sent))

1805

1301

sent_size += sent

1806

1302

1807

1303

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

1808

# bump the timeout using extended_timeout

1809

client.bump_timeout(client.extended_timeout)

1304

# bump the timeout as if seen

1305

client.checked_ok()

1810

1306

if self.server.use_dbus:

1811

1307

# Emit D-Bus signal

1812

1308

client.GotSecret()

1816

1312

client.approvals_pending -= 1

1817

1313

try:

1818

1314

session.bye()

1819

except gnutls.errors.GNUTLSError as error:

1820

logger.warning("GnuTLS bye failed",

1821

exc_info=error)

1315

except (gnutls.errors.GNUTLSError), error:

1316

logger.warning("GnuTLS bye failed")

1822

1317

1823

1318

@staticmethod

1824

1319

def peer_certificate(session):

1880

1375

# Convert the buffer to a Python bytestring

1881

1376

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

1882

1377

# Convert the bytestring to hexadecimal notation

1883

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

1378

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

1884

1379

return hex_fpr

1885

1380

1886

1381

1889

1384

def sub_process_main(self, request, address):

1890

1385

try:

1891

1386

self.finish_request(request, address)

1892

except Exception:

1387

except:

1893

1388

self.handle_error(request, address)

1894

1389

self.close_request(request)

1895

1390

1896

1391

def process_request(self, request, address):

1897

1392

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

1898

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

1899

args = (request, address))

1900

proc.start()

1901

return proc

1902

1393

multiprocessing.Process(target = self.sub_process_main,

1394

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

1903

1395

1904

1396

class MultiprocessingMixInWithPipe(MultiprocessingMixIn, object):

1905

1397

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

1909

1401

This function creates a new pipe in self.pipe

1910

1402

"""

1911

1403

parent_pipe, self.child_pipe = multiprocessing.Pipe()

1912

1913

proc = MultiprocessingMixIn.process_request(self, request,

1914

client_address)

1404

1405

super(MultiprocessingMixInWithPipe,

1406

self).process_request(request, client_address)

1915

1407

self.child_pipe.close()

1916

self.add_pipe(parent_pipe, proc)

1917

1918

def add_pipe(self, parent_pipe, proc):

1408

self.add_pipe(parent_pipe)

1409

1410

def add_pipe(self, parent_pipe):

1919

1411

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

1920

raise NotImplementedError()

1921

1412

pass

1922

1413

1923

1414

class IPv6_TCPServer(MultiprocessingMixInWithPipe,

1924

1415

socketserver.TCPServer, object):

1930

1421

use_ipv6: Boolean; to use IPv6 or not

1931

1422

"""

1932

1423

def __init__(self, server_address, RequestHandlerClass,

1933

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

1934

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

1935

creating a new one with socket.socket().

1936

"""

1424

interface=None, use_ipv6=True):

1937

1425

self.interface = interface

1938

1426

if use_ipv6:

1939

1427

self.address_family = socket.AF_INET6

1940

if socketfd is not None:

1941

# Save the file descriptor

1942

self.socketfd = socketfd

1943

# Save the original socket.socket() function

1944

self.socket_socket = socket.socket

1945

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

1946

#

1947

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

1948

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

1949

# patching socket.socket.)

1950

#

1951

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

1952

@functools.wraps(socket.socket)

1953

def socket_wrapper(*args, **kwargs):

1954

# Restore original function so subsequent calls are

1955

# not affected.

1956

socket.socket = self.socket_socket

1957

del self.socket_socket

1958

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

1959

# saved file descriptor.

1960

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

1961

# Replace socket.socket() function with wrapper

1962

socket.socket = socket_wrapper

1963

# The socketserver.TCPServer.__init__ will call

1964

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

1965

# socket_wrapper(), if socketfd was set.

1966

1428

socketserver.TCPServer.__init__(self, server_address,

1967

1429

RequestHandlerClass)

1968

1969

1430

def server_bind(self):

1970

1431

"""This overrides the normal server_bind() function

1971

1432

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

1979

1440

try:

1980

1441

self.socket.setsockopt(socket.SOL_SOCKET,

1981

1442

SO_BINDTODEVICE,

1982

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

1983

except socket.error as error:

1984

if error.errno == errno.EPERM:

1985

logger.error("No permission to bind to"

1986

" interface %s", self.interface)

1987

elif error.errno == errno.ENOPROTOOPT:

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:

1988

1451

logger.error("SO_BINDTODEVICE not available;"

1989

1452

" cannot bind to interface %s",

1990

1453

self.interface)

1991

elif error.errno == errno.ENODEV:

1992

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

1993

" cannot bind", self.interface)

1994

1454

else:

1995

1455

raise

1996

1456

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

1999

1459

if self.address_family == socket.AF_INET6:

2000

1460

any_address = "::" # in6addr_any

2001

1461

else:

2002

any_address = "0.0.0.0" # INADDR_ANY

1462

any_address = socket.INADDR_ANY

2003

1463

self.server_address = (any_address,

2004

1464

self.server_address[1])

2005

1465

elif not self.server_address[1]:

2026

1486

"""

2027

1487

def __init__(self, server_address, RequestHandlerClass,

2028

1488

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

2029

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

1489

gnutls_priority=None, use_dbus=True):

2030

1490

self.enabled = False

2031

1491

self.clients = clients

2032

1492

if self.clients is None:

2033

self.clients = {}

1493

self.clients = set()

2034

1494

self.use_dbus = use_dbus

2035

1495

self.gnutls_priority = gnutls_priority

2036

1496

IPv6_TCPServer.__init__(self, server_address,

2037

1497

RequestHandlerClass,

2038

1498

interface = interface,

2039

use_ipv6 = use_ipv6,

2040

socketfd = socketfd)

1499

use_ipv6 = use_ipv6)

2041

1500

def server_activate(self):

2042

1501

if self.enabled:

2043

1502

return socketserver.TCPServer.server_activate(self)

2044

2045

1503

def enable(self):

2046

1504

self.enabled = True

2047

2048

def add_pipe(self, parent_pipe, proc):

1505

def add_pipe(self, parent_pipe):

2049

1506

# Call "handle_ipc" for both data and EOF events

2050

1507

gobject.io_add_watch(parent_pipe.fileno(),

2051

1508

gobject.IO_IN | gobject.IO_HUP,

2052

1509

functools.partial(self.handle_ipc,

2053

parent_pipe =

2054

parent_pipe,

2055

proc = proc))

2056

1510

parent_pipe = parent_pipe))

1511

2057

1512

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

2058

proc = None, client_object=None):

2059

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

2060

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

2061

# Wait for other process to exit

2062

proc.join()

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):

2063

1530

return False

2064

1531

2065

1532

# Read a request from the child

2070

1537

fpr = request[1]

2071

1538

address = request[2]

2072

1539

2073

for c in self.clients.itervalues():

1540

for c in self.clients:

2074

1541

if c.fingerprint == fpr:

2075

1542

client = c

2076

1543

break

2077

1544

else:

2078

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

2079

"dress: %s", fpr, address)

1545

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

1546

"dress: %s", fpr, address)

2080

1547

if self.use_dbus:

2081

1548

# Emit D-Bus signal

2082

mandos_dbus_service.ClientNotFound(fpr,

2083

address[0])

1549

mandos_dbus_service.ClientNotFound(fpr, address[0])

2084

1550

parent_pipe.send(False)

2085

1551

return False

2086

1552

2087

1553

gobject.io_add_watch(parent_pipe.fileno(),

2088

1554

gobject.IO_IN | gobject.IO_HUP,

2089

1555

functools.partial(self.handle_ipc,

2090

parent_pipe =

2091

parent_pipe,

2092

proc = proc,

2093

client_object =

2094

client))

1556

parent_pipe = parent_pipe,

1557

client_object = client))

2095

1558

parent_pipe.send(True)

2096

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

2097

# same fileno

1559

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

2098

1560

return False

2099

1561

if command == 'funcall':

2100

1562

funcname = request[1]

2101

1563

args = request[2]

2102

1564

kwargs = request[3]

2103

1565

2104

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

2105

funcname)(*args,

2106

**kwargs)))

2107

1566

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

1567

2108

1568

if command == 'getattr':

2109

1569

attrname = request[1]

2110

1570

if callable(client_object.__getattribute__(attrname)):

2111

1571

parent_pipe.send(('function',))

2112

1572

else:

2113

parent_pipe.send(('data', client_object

2114

.__getattribute__(attrname)))

1573

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

2115

1574

2116

1575

if command == 'setattr':

2117

1576

attrname = request[1]

2118

1577

value = request[2]

2119

1578

setattr(client_object, attrname, value)

2120

1579

2121

1580

return True

2122

1581

2123

1582

2124

def rfc3339_duration_to_delta(duration):

2125

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

2126

2127

>>> rfc3339_duration_to_delta("P7D")

2128

datetime.timedelta(7)

2129

>>> rfc3339_duration_to_delta("PT60S")

2130

datetime.timedelta(0, 60)

2131

>>> rfc3339_duration_to_delta("PT60M")

2132

datetime.timedelta(0, 3600)

2133

>>> rfc3339_duration_to_delta("PT24H")

2134

datetime.timedelta(1)

2135

>>> rfc3339_duration_to_delta("P1W")

2136

datetime.timedelta(7)

2137

>>> rfc3339_duration_to_delta("PT5M30S")

2138

datetime.timedelta(0, 330)

2139

>>> rfc3339_duration_to_delta("P1DT3M20S")

2140

datetime.timedelta(1, 200)

2141

"""

2142

2143

# Parsing an RFC 3339 duration with regular expressions is not

2144

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

2145

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

2146

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

2147

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

2148

# avoid excessive use of external libraries.

2149

2150

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

2151

Token = collections.namedtuple("Token",

2152

("regexp", # To match token; if

2153

# "value" is not None,

2154

# must have a "group"

2155

# containing digits

2156

"value", # datetime.timedelta or

2157

# None

2158

"followers")) # Tokens valid after

2159

# this token

2160

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

2161

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

2162

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

2163

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

2164

datetime.timedelta(seconds=1),

2165

frozenset((token_end,)))

2166

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

2167

datetime.timedelta(minutes=1),

2168

frozenset((token_second, token_end)))

2169

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

2170

datetime.timedelta(hours=1),

2171

frozenset((token_minute, token_end)))

2172

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

2173

None,

2174

frozenset((token_hour, token_minute,

2175

token_second)))

2176

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

2177

datetime.timedelta(days=1),

2178

frozenset((token_time, token_end)))

2179

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

2180

datetime.timedelta(weeks=4),

2181

frozenset((token_day, token_end)))

2182

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

2183

datetime.timedelta(weeks=52),

2184

frozenset((token_month, token_end)))

2185

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

2186

datetime.timedelta(weeks=1),

2187

frozenset((token_end,)))

2188

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

2189

frozenset((token_year, token_month,

2190

token_day, token_time,

2191

token_week)))

2192

# Define starting values

2193

value = datetime.timedelta() # Value so far

2194

found_token = None

2195

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

2196

s = duration # String left to parse

2197

# Loop until end token is found

2198

while found_token is not token_end:

2199

# Search for any currently valid tokens

2200

for token in followers:

2201

match = token.regexp.match(s)

2202

if match is not None:

2203

# Token found

2204

if token.value is not None:

2205

# Value found, parse digits

2206

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

2207

# Add to value so far

2208

value += factor * token.value

2209

# Strip token from string

2210

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

2211

# Go to found token

2212

found_token = token

2213

# Set valid next tokens

2214

followers = found_token.followers

2215

break

2216

else:

2217

# No currently valid tokens were found

2218

raise ValueError("Invalid RFC 3339 duration")

2219

# End token found

2220

return value

2221

2222

2223

1583

def string_to_delta(interval):

2224

1584

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

2225

1585

2236

1596

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

2237

1597

datetime.timedelta(0, 330)

2238

1598

"""

2239

2240

try:

2241

return rfc3339_duration_to_delta(interval)

2242

except ValueError:

2243

pass

2244

2245

1599

timevalue = datetime.timedelta(0)

2246

1600

for s in interval.split():

2247

1601

try:

2258

1612

elif suffix == "w":

2259

1613

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

2260

1614

else:

2261

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

2262

.format(suffix))

2263

except IndexError as e:

2264

raise ValueError(*(e.args))

1615

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

1616

except (ValueError, IndexError), e:

1617

raise ValueError(e.message)

2265

1618

timevalue += delta

2266

1619

return timevalue

2267

1620

2268

1621

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

2269

1646

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

2270

1647

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

2271

1648

2279

1656

sys.exit()

2280

1657

if not noclose:

2281

1658

# Close all standard open file descriptors

2282

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

1659

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

2283

1660

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

2284

1661

raise OSError(errno.ENODEV,

2285

"{0} not a character device"

2286

.format(os.devnull))

1662

"%s not a character device"

1663

% os.path.devnull)

2287

1664

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

2288

1665

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

2289

1666

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

2296

1673

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

2297

1674

# Parsing of options, both command line and config file

2298

1675

2299

parser = argparse.ArgumentParser()

2300

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

2301

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

2302

help="show version number and exit")

2303

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

2304

help="Bind to interface IF")

2305

parser.add_argument("-a", "--address",

2306

help="Address to listen for requests on")

2307

parser.add_argument("-p", "--port", type=int,

2308

help="Port number to receive requests on")

2309

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

2310

help="Run self-test")

2311

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

2312

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

2313

" to terminal", default=None)

2314

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

2315

help="Debug level for stdout output")

2316

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

2317

" priority string (see GnuTLS documentation)")

2318

parser.add_argument("--servicename",

2319

metavar="NAME", help="Zeroconf service name")

2320

parser.add_argument("--configdir",

2321

default="/etc/mandos", metavar="DIR",

2322

help="Directory to search for configuration"

2323

" files")

2324

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

2325

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

2326

" system bus interface", default=None)

2327

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

2328

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

2329

default=None)

2330

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

2331

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

2332

" state", default=None)

2333

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

2334

help="Specify a file descriptor to a network"

2335

" socket to use instead of creating one")

2336

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

2337

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

2338

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

2339

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

2340

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

2341

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

2342

default=None)

2343

2344

options = parser.parse_args()

1676

parser = optparse.OptionParser(version = "%%prog %s" % version)

1677

parser.add_option("-i", "--interface", type="string",

1678

metavar="IF", help="Bind to interface IF")

1679

parser.add_option("-a", "--address", type="string",

1680

help="Address to listen for requests on")

1681

parser.add_option("-p", "--port", type="int",

1682

help="Port number to receive requests on")

1683

parser.add_option("--check", action="store_true",

1684

help="Run self-test")

1685

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

1686

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

1687

" terminal")

1688

parser.add_option("--debuglevel", type="string", metavar="LEVEL",

1689

help="Debug level for stdout output")

1690

parser.add_option("--priority", type="string", help="GnuTLS"

1691

" priority string (see GnuTLS documentation)")

1692

parser.add_option("--servicename", type="string",

1693

metavar="NAME", help="Zeroconf service name")

1694

parser.add_option("--configdir", type="string",

1695

default="/etc/mandos", metavar="DIR",

1696

help="Directory to search for configuration"

1697

" files")

1698

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

1699

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

1700

" system bus interface")

1701

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

1702

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

1703

options = parser.parse_args()[0]

2345

1704

2346

1705

if options.check:

2347

1706

import doctest

2348

fail_count, test_count = doctest.testmod()

2349

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

1707

doctest.testmod()

1708

sys.exit()

2350

1709

2351

1710

# Default values for config file for server-global settings

2352

1711

server_defaults = { "interface": "",

2354

1713

"port": "",

2355

1714

"debug": "False",

2356

1715

"priority":

2357

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

1716

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

2358

1717

"servicename": "Mandos",

2359

1718

"use_dbus": "True",

2360

1719

"use_ipv6": "True",

2361

1720

"debuglevel": "",

2362

"restore": "True",

2363

"socket": "",

2364

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

2365

"foreground": "False",

2366

"zeroconf": "True",

2367

1721

}

2368

1722

2369

1723

# Parse config file for server-global settings

2374

1728

# Convert the SafeConfigParser object to a dict

2375

1729

server_settings = server_config.defaults()

2376

1730

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

2377

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

1731

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

2378

1732

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

2379

1733

option)

2380

1734

if server_settings["port"]:

2381

1735

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

2382

1736

"port")

2383

if server_settings["socket"]:

2384

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

2385

"socket")

2386

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

2387

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

2388

# happen with a supplied network socket.

2389

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

2390

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

2391

["socket"])

2392

1737

del server_config

2393

1738

2394

1739

# Override the settings from the config file with command line

2395

1740

# options, if set.

2396

1741

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

2397

1742

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

2398

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

2399

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

1743

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

2400

1744

value = getattr(options, option)

2401

1745

if value is not None:

2402

1746

server_settings[option] = value

2405

1749

for option in server_settings.keys():

2406

1750

if type(server_settings[option]) is str:

2407

1751

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

2408

# Force all boolean options to be boolean

2409

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

2410

"foreground", "zeroconf"):

2411

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

2412

# Debug implies foreground

2413

if server_settings["debug"]:

2414

server_settings["foreground"] = True

2415

1752

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

2416

1753

2417

1754

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

2418

1755

2419

if (not server_settings["zeroconf"] and

2420

not (server_settings["port"]

2421

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

2422

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

2423

" Zeroconf")

2424

2425

1756

# For convenience

2426

1757

debug = server_settings["debug"]

2427

1758

debuglevel = server_settings["debuglevel"]

2428

1759

use_dbus = server_settings["use_dbus"]

2429

1760

use_ipv6 = server_settings["use_ipv6"]

2430

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

2431

stored_state_file)

2432

foreground = server_settings["foreground"]

2433

zeroconf = server_settings["zeroconf"]

2434

2435

if debug:

2436

initlogger(debug, logging.DEBUG)

2437

else:

2438

if not debuglevel:

2439

initlogger(debug)

2440

else:

2441

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

2442

initlogger(debug, level)

2443

1761

2444

1762

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

2445

1763

syslogger.setFormatter(logging.Formatter

2446

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

2447

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

2448

.format(server_settings

2449

["servicename"])))

1764

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

1765

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

1766

% server_settings["servicename"]))

2450

1767

2451

1768

# Parse config file with clients

2452

client_config = configparser.SafeConfigParser(Client

2453

.client_defaults)

1769

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

1770

"interval": "5m",

1771

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

1772

"host": "",

1773

"approval_delay": "0s",

1774

"approval_duration": "1s",

1775

}

1776

client_config = configparser.SafeConfigParser(client_defaults)

2454

1777

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

2455

1778

"clients.conf"))

2456

1779

2457

1780

global mandos_dbus_service

2458

1781

mandos_dbus_service = None

2459

1782

2460

socketfd = None

2461

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

2462

socketfd = server_settings["socket"]

2463

1783

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

2464

1784

server_settings["port"]),

2465

1785

ClientHandler,

2468

1788

use_ipv6=use_ipv6,

2469

1789

gnutls_priority=

2470

1790

server_settings["priority"],

2471

use_dbus=use_dbus,

2472

socketfd=socketfd)

2473

if not foreground:

2474

pidfilename = "/run/mandos.pid"

2475

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

2476

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

2477

pidfile = None

1791

use_dbus=use_dbus)

1792

if not debug:

1793

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

2478

1794

try:

2479

1795

pidfile = open(pidfilename, "w")

2480

except IOError as e:

2481

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

2482

exc_info=e)

1796

except IOError:

1797

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

2483

1798

2484

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

1799

try:

1800

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

1801

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

1802

except KeyError:

2485

1803

try:

2486

uid = pwd.getpwnam(name).pw_uid

2487

gid = pwd.getpwnam(name).pw_gid

2488

break

1804

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

1805

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

2489

1806

except KeyError:

2490

continue

2491

else:

2492

uid = 65534

2493

gid = 65534

1807

try:

1808

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

1809

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

1810

except KeyError:

1811

uid = 65534

1812

gid = 65534

2494

1813

try:

2495

1814

os.setgid(gid)

2496

1815

os.setuid(uid)

2497

except OSError as error:

2498

if error.errno != errno.EPERM:

2499

raise

1816

except OSError, error:

1817

if error[0] != errno.EPERM:

1818

raise error

2500

1819

1820

if not debug and not debuglevel:

1821

syslogger.setLevel(logging.WARNING)

1822

console.setLevel(logging.WARNING)

1823

if debuglevel:

1824

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

1825

syslogger.setLevel(level)

1826

console.setLevel(level)

1827

2501

1828

if debug:

2502

1829

# Enable all possible GnuTLS debugging

2503

1830

2513

1840

.gnutls_global_set_log_function(debug_gnutls))

2514

1841

2515

1842

# Redirect stdin so all checkers get /dev/null

2516

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

1843

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

2517

1844

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

2518

1845

if null > 2:

2519

1846

os.close(null)

1847

else:

1848

# No console logging

1849

logger.removeHandler(console)

2520

1850

2521

1851

# Need to fork before connecting to D-Bus

2522

if not foreground:

1852

if not debug:

2523

1853

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

2524

1854

daemon()

2525

1855

2526

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

2527

# need to inform gobject that threads will be used.

2528

gobject.threads_init()

2529

2530

1856

global main_loop

2531

1857

# From the Avahi example code

2532

DBusGMainLoop(set_as_default=True)

1858

DBusGMainLoop(set_as_default=True )

2533

1859

main_loop = gobject.MainLoop()

2534

1860

bus = dbus.SystemBus()

2535

1861

# End of Avahi example code

2536

1862

if use_dbus:

2537

1863

try:

2538

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

1864

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

2539

1865

bus, do_not_queue=True)

2540

old_bus_name = (dbus.service.BusName

2541

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

2542

do_not_queue=True))

2543

except dbus.exceptions.NameExistsException as e:

2544

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

1866

except dbus.exceptions.NameExistsException, e:

1867

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

2545

1868

use_dbus = False

2546

1869

server_settings["use_dbus"] = False

2547

1870

tcp_server.use_dbus = False

2548

if zeroconf:

2549

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

2550

service = AvahiServiceToSyslog(name =

2551

server_settings["servicename"],

2552

servicetype = "_mandos._tcp",

2553

protocol = protocol, bus = bus)

2554

if server_settings["interface"]:

2555

service.interface = (if_nametoindex

2556

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

1871

protocol = avahi.PROTO_INET6 if use_ipv6 else avahi.PROTO_INET

1872

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

1873

servicetype = "_mandos._tcp",

1874

protocol = protocol, bus = bus)

1875

if server_settings["interface"]:

1876

service.interface = (if_nametoindex

1877

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

2557

1878

2558

1879

global multiprocessing_manager

2559

1880

multiprocessing_manager = multiprocessing.Manager()

2561

1882

client_class = Client

2562

1883

if use_dbus:

2563

1884

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

2564

2565

client_settings = Client.config_parser(client_config)

2566

old_client_settings = {}

2567

clients_data = {}

2568

2569

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

2570

global wnull

2571

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

2572

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

2573

# mode

2574

if debug or not foreground:

2575

wnull.close()

2576

2577

# Get client data and settings from last running state.

2578

if server_settings["restore"]:

2579

try:

2580

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

2581

clients_data, old_client_settings = (pickle.load

2582

(stored_state))

2583

os.remove(stored_state_path)

2584

except IOError as e:

2585

if e.errno == errno.ENOENT:

2586

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

2587

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

2588

else:

2589

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

2590

exc_info=e)

2591

raise

2592

except EOFError as e:

2593

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

2594

"EOFError:", exc_info=e)

2595

2596

with PGPEngine() as pgp:

2597

for client_name, client in clients_data.iteritems():

2598

# Skip removed clients

2599

if client_name not in client_settings:

2600

continue

2601

2602

# Decide which value to use after restoring saved state.

2603

# We have three different values: Old config file,

2604

# new config file, and saved state.

2605

# New config value takes precedence if it differs from old

2606

# config value, otherwise use saved state.

2607

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

2608

try:

2609

# For each value in new config, check if it

2610

# differs from the old config value (Except for

2611

# the "secret" attribute)

2612

if (name != "secret" and

2613

value != old_client_settings[client_name]

2614

[name]):

2615

client[name] = value

2616

except KeyError:

2617

pass

2618

2619

# Clients who has passed its expire date can still be

2620

# enabled if its last checker was successful. Clients

2621

# whose checker succeeded before we stored its state is

2622

# assumed to have successfully run all checkers during

2623

# downtime.

2624

if client["enabled"]:

2625

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

2626

if not client["last_checked_ok"]:

2627

logger.warning(

2628

"disabling client {0} - Client never "

2629

"performed a successful checker"

2630

.format(client_name))

2631

client["enabled"] = False

2632

elif client["last_checker_status"] != 0:

2633

logger.warning(

2634

"disabling client {0} - Client "

2635

"last checker failed with error code {1}"

2636

.format(client_name,

2637

client["last_checker_status"]))

2638

client["enabled"] = False

2639

else:

2640

client["expires"] = (datetime.datetime

2641

.utcnow()

2642

+ client["timeout"])

2643

logger.debug("Last checker succeeded,"

2644

" keeping {0} enabled"

2645

.format(client_name))

1885

def client_config_items(config, section):

1886

special_settings = {

1887

"approved_by_default":

1888

lambda: config.getboolean(section,

1889

"approved_by_default"),

1890

}

1891

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

2646

1892

try:

2647

client["secret"] = (

2648

pgp.decrypt(client["encrypted_secret"],

2649

client_settings[client_name]

2650

["secret"]))

2651

except PGPError:

2652

# If decryption fails, we use secret from new settings

2653

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

2654

.format(client_name))

2655

client["secret"] = (

2656

client_settings[client_name]["secret"])

2657

2658

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

2659

for client_name in (set(old_client_settings)

2660

- set(client_settings)):

2661

del clients_data[client_name]

2662

for client_name in (set(client_settings)

2663

- set(old_client_settings)):

2664

clients_data[client_name] = client_settings[client_name]

2665

2666

# Create all client objects

2667

for client_name, client in clients_data.iteritems():

2668

tcp_server.clients[client_name] = client_class(

2669

name = client_name, settings = client,

2670

server_settings = server_settings)

2671

1893

yield (name, special_settings[name]())

1894

except KeyError:

1895

yield (name, value)

1896

1897

tcp_server.clients.update(set(

1898

client_class(name = section,

1899

config= dict(client_config_items(

1900

client_config, section)))

1901

for section in client_config.sections()))

2672

1902

if not tcp_server.clients:

2673

1903

logger.warning("No clients defined")

2674

2675

if not foreground:

2676

if pidfile is not None:

2677

try:

2678

with pidfile:

2679

pid = os.getpid()

2680

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

2681

except IOError:

2682

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

2683

pidfilename, pid)

2684

del pidfile

1904

1905

if not debug:

1906

try:

1907

with pidfile:

1908

pid = os.getpid()

1909

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

1910

del pidfile

1911

except IOError:

1912

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

1913

pidfilename, pid)

1914

except NameError:

1915

# "pidfile" was never created

1916

pass

2685

1917

del pidfilename

2686

1918

1919

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

1920

2687

1921

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

2688

1922

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

2689

1923

2690

1924

if use_dbus:

2691

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

2692

"se.bsnet.fukt.Mandos"})

2693

class MandosDBusService(DBusObjectWithProperties):

1925

class MandosDBusService(dbus.service.Object):

2694

1926

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

2695

1927

def __init__(self):

2696

1928

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

2697

_interface = "se.recompile.Mandos"

2698

2699

@dbus_interface_annotations(_interface)

2700

def _foo(self):

2701

return { "org.freedesktop.DBus.Property"

2702

".EmitsChangedSignal":

2703

"false"}

1929

_interface = "se.bsnet.fukt.Mandos"

2704

1930

2705

1931

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

2706

1932

def ClientAdded(self, objpath):

2721

1947

def GetAllClients(self):

2722

1948

"D-Bus method"

2723

1949

return dbus.Array(c.dbus_object_path

2724

for c in

2725

tcp_server.clients.itervalues())

1950

for c in tcp_server.clients)

2726

1951

2727

1952

@dbus.service.method(_interface,

2728

1953

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

2730

1955

"D-Bus method"

2731

1956

return dbus.Dictionary(

2732

1957

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

2733

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

1958

for c in tcp_server.clients),

2734

1959

signature="oa{sv}")

2735

1960

2736

1961

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

2737

1962

def RemoveClient(self, object_path):

2738

1963

"D-Bus method"

2739

for c in tcp_server.clients.itervalues():

1964

for c in tcp_server.clients:

2740

1965

if c.dbus_object_path == object_path:

2741

del tcp_server.clients[c.name]

1966

tcp_server.clients.remove(c)

2742

1967

c.remove_from_connection()

2743

1968

# Don't signal anything except ClientRemoved

2744

1969

c.disable(quiet=True)

2753

1978

2754

1979

def cleanup():

2755

1980

"Cleanup function; run on exit"

2756

if zeroconf:

2757

service.cleanup()

2758

2759

multiprocessing.active_children()

2760

wnull.close()

2761

if not (tcp_server.clients or client_settings):

2762

return

2763

2764

# Store client before exiting. Secrets are encrypted with key

2765

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

2766

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

2767

clients = {}

2768

with PGPEngine() as pgp:

2769

for client in tcp_server.clients.itervalues():

2770

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

2771

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

2772

key)

2773

client_dict = {}

2774

2775

# A list of attributes that can not be pickled

2776

# + secret.

2777

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

2778

"checker", "server_settings" }

2779

for name, typ in (inspect.getmembers

2780

(dbus.service.Object)):

2781

exclude.add(name)

2782

2783

client_dict["encrypted_secret"] = (client

2784

.encrypted_secret)

2785

for attr in client.client_structure:

2786

if attr not in exclude:

2787

client_dict[attr] = getattr(client, attr)

2788

2789

clients[client.name] = client_dict

2790

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

2791

2792

try:

2793

with (tempfile.NamedTemporaryFile

2794

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

2795

dir=os.path.dirname(stored_state_path),

2796

delete=False)) as stored_state:

2797

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

2798

tempname=stored_state.name

2799

os.rename(tempname, stored_state_path)

2800

except (IOError, OSError) as e:

2801

if not debug:

2802

try:

2803

os.remove(tempname)

2804

except NameError:

2805

pass

2806

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

2807

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

2808

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

2809

else:

2810

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

2811

exc_info=e)

2812

raise

2813

2814

# Delete all clients, and settings from config

1981

service.cleanup()

1982

2815

1983

while tcp_server.clients:

2816

name, client = tcp_server.clients.popitem()

1984

client = tcp_server.clients.pop()

2817

1985

if use_dbus:

2818

1986

client.remove_from_connection()

1987

client.disable_hook = None

2819

1988

# Don't signal anything except ClientRemoved

2820

1989

client.disable(quiet=True)

2821

1990

if use_dbus:

2822

1991

# Emit D-Bus signal

2823

mandos_dbus_service.ClientRemoved(client

2824

.dbus_object_path,

1992

mandos_dbus_service.ClientRemoved(client.dbus_object_path,

2825

1993

client.name)

2826

client_settings.clear()

2827

1994

2828

1995

atexit.register(cleanup)

2829

1996

2830

for client in tcp_server.clients.itervalues():

1997

for client in tcp_server.clients:

2831

1998

if use_dbus:

2832

1999

# Emit D-Bus signal

2833

2000

mandos_dbus_service.ClientAdded(client.dbus_object_path)

2834

# Need to initiate checking of clients

2835

if client.enabled:

2836

client.init_checker()

2001

client.enable()

2837

2002

2838

2003

tcp_server.enable()

2839

2004

tcp_server.server_activate()

2840

2005

2841

2006

# Find out what port we got

2842

if zeroconf:

2843

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

2007

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

2844

2008

if use_ipv6:

2845

2009

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

2846

" flowinfo %d, scope_id %d",

2847

*tcp_server.socket.getsockname())

2010

" flowinfo %d, scope_id %d"

2011

% tcp_server.socket.getsockname())

2848

2012

else: # IPv4

2849

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

2850

*tcp_server.socket.getsockname())

2013

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

2014

% tcp_server.socket.getsockname())

2851

2015

2852

2016

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

2853

2017

2854

2018

try:

2855

if zeroconf:

2856

# From the Avahi example code

2857

try:

2858

service.activate()

2859

except dbus.exceptions.DBusException as error:

2860

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

2861

cleanup()

2862

sys.exit(1)

2863

# End of Avahi example code

2019

# From the Avahi example code

2020

try:

2021

service.activate()

2022

except dbus.exceptions.DBusException, error:

2023

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

2024

cleanup()

2025

sys.exit(1)

2026

# End of Avahi example code

2864

2027

2865

2028

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

2866

2029

lambda *args, **kwargs:

2869

2032

2870

2033

logger.debug("Starting main loop")

2871

2034

main_loop.run()

2872

except AvahiError as error:

2873

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

2035

except AvahiError, error:

2036

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

2874

2037

cleanup()

2875

2038

sys.exit(1)

2876

2039

except KeyboardInterrupt: